As a residential consumer, you don't get to take advantage of all these efficiencies, and will, unfortunately, pay top dollar. Request your feedback.. Some forms of silica, known as colloidal, or non-reactive, are not removed by a demineralizer. If you're talking about the concentrated water from the other side of the membrane, I wouldn't put it on any plantings I care about, although a controlled application of Silica is indeed very good for a plant's immune system- this could be scorch-level concentrated, including with other stuff like Sodium, though so no. level of 5 ppm - is this by IE/RO/SBA or by EDI? The water has low hardness, less than 10 mg/L, low pH 4 to 5, and relatively high soluble iron, hydrogen sulfide and aluminium. Oil coming out of desalter is almost free of water; however I would expect scaling formation in heaters/reboilers if there is still some retained in "dry" oil. Silica can exist in water as relatively large particles, known as silica granules or granular silicates. in filter water silica value comes 7-10 ppm . Silica removal from boiler water can be done by using dolomite lime or active magnesia in the softener. Colloidal silica has no ionic properties, but has a relatively large size and can be effectively removed by fine mechanical methods like Ultrafiltration (UF). In some cases for very large flow rates you can remove silica with lime softening techniques. Total Dissolved Silica 114g/m3 as SiO2 (silicon x 2.14 by calculation) The product works by using a microbe that accepts silica through the cell wall, giving enough surface area and charge to physically remove the silica. And I assume a reverse osmosis system for the whole house would be no better? A. Hi Shirley, Nice answer. The deposition is mainly depends on the silica percentage in boiler feed water . in bore well water analysis (in ppm): Are there now any whole house water filtration systems that reliably In lime softening the silica is co-precipitated along with magnesium present in the water (or added if necessary). "popup": { Vaporization of Boiler Water Salts. It is essential to remove colloidal silica from water to be used in high pressure boiler operations. Two basic ways to regulate corrosion in water, are All Volatile … Silica needs to be controlled at DM plant also. The county utility says our water is not hard (calcium levels aren't high). Can anyone explain why did this happen and is there anything where alkalinity comes into picture? So that we can keep moving forward, and not go around in circles, please ask for any desired clarifications about the many technologies already discussed, or post a more specific question. This interferes with heat transfers and may cause hot spots. remove silica so that deposits do not occur on bathroom fixtures, If treatment required, please suggest treatment. A. Silica leakage is lower if you regenerate the DI system counter-currently and regenerate the anion exchanger before exhaustion as determined by conductivity and also more frequently. Steam contamination (solid particles in the superheated steam) comes from the boiler water largely in the carry‐over of water droplets. Sir...I am facing a big problem with new High Pressure Boiler cleaning. window.cookieconsent.initialise({ What about just a water softener? Can you provide us some suggestion to reduce the silica concentration in final steam? Is it okay OR does it needs to be treated? Silicate and silica particles of otherwise identical mineral forms can have different surface charge, according to their geo-history or immediate pre treatment. The service requires full JavaScript support in order to view this website. This is only about 60% recovery. <1 mg/L should be possible. High temperature softening greatly improves silica removal. And you can usually install them yourself! I am generating dm water of pH 6.4, conductivity 1.2 µs/cm. www.watertechonline.com is using a security service for protection against online attacks. Take silica in an beaker & heat it at 110 deg. I face these issues a lot in Papua New Guinea, which has hard, high silica water in most areas. Thank you. Normally these methods work well for most well or surface waters where silica is below 15-20 ppm. RO is an option but to centrally treat the water will cost over $15,000. Evaporation in a boiler causes impurities to concentrate. Q. I have a well, used for our house, that has high level's of silica (103 mg/L). Big RO systems like that are ubiquitous on ships -this is the experience I've had with them, working the commercial fishing fleet in the Bering sea, and where I discovered how atrocious they are for showering. SiO2 of SBA is continuously increasing after regeneration system taken in line. 3a) "They said silica is at only about 20 parts. What about whole house? A. A. Good luck! I am not educated in the 'hard' sciences so most of the information provided in this thread for water experts over the many years is above me. Q. I am looking for a non-abrasive method to remove silica build up on faucets, shower heads, etc.? You should call up one of the many companies that specializes in this sort of thing, explain your predicament, and get some quotes to help you decide how much it is worth to you annually not to have mineral deposits on glassware and fixtures. 4)" Is it healthier to drink our minimally treated spring water which always passes the utility's required testing or to drink RO water from which minerals are removed?" in DM water with silica 0.02 ppm. Magnesium oxide has been found to quite effective in this regards. Thank you. Quick questions, quick answers as I shove a cold cheeseburger in my face, here goes!!! 3a) We are in a rural community served by a county spring, treated only with minimal levels of chlorine. 3c) "Would the 'waste' water be safe for grass and plants?" We add Chlorine Dioxide at the source killing most of yeast & moulds. Maybe SBA EXHAUST but a doubt due to not possible that fresh SBA taken in. Reverse osmosis will also remove silica by 90-98%. There were a couple of gems in that monograph. This makes sense. I am trying to learn more information on removal of silicon from water. Quick notes on what it is and how it works: Q. Dear, in our boiler the silica contains 0.53. Q. Still getting large growths of algae after about 20 days. KINDLY TELL ME HOW TO REMOVE THIS SILICA FROM SBA? Promptly have the boiler operator operate the boiler to heat the cleaning solution in the boiler to a maximum of 130 F. DO NOT BOIL THE WATER. Do you think under sink RO systems would be effective/realistic? A quick perusal of sales of these suggests that using them for all water obtained at our bathroom and kitchen sinks would be quite affordable. What could be the possible method to remove 50-70 ppb of colloidal silica to NIL ? This process is automatic. As such, they can form deposits on tube surfaces and volatilize into the steam. Which of these silica forms can I remove by microfilter? A. A. Hello Lucky. Silica Ion-Exchange system can complement any water treatment system if there is a need to remove the silica from water specifically. Silica in deionized water can easily be reduced to 20-50 ppb. Q. Dear all Good luck... and oh yeah... don't shower in deionized water :), Q. Thank you for taking the time to so thoroughly explain what a DI system is, how it works and the costs involved in installation, use, upkeep, etc. A. 5 mg/L of silica in the permeate with only 28 mg/L in the feed is not very good rejection. Q. I am a crude stabilization unit process engineer. Q. I'm doing my research in desalination esp. COOLING tower water could be reused and recycled ten or more times by using a new silica-removing membrane, according to US researchers. Q. Hi folks, When questions are presented as requests for clarification of suggestions that have been offered, they usually elicit enthusiastic response; but if earlier answers are just blown off, and questions are posed as "start over for me because I can't be bothered putting in any work to try to appreciate what you wrote", the thread often dies). Q. You'd have a contractor set up a system that includes a pump, a prefilter, one or more ion-exchange canisters full of resin, a postfilter, a holding tank, various pressure monitoring gauges, pipes, hoses, and a conductivity sensor that will indicate when the system is not able to process your incoming water any more due to the resin being saturated or 'spent'. The main concern is the use of membrane filters after chemical oxidation using Chlorine gas and pH and alkalinity adjustment using Calcite Filters. WBA INLET SHOWS 5-7 PPM, SBA OUTLET SHOWS 1-.7 PPM INSTEAD OF <.02 PPM. We use condensate as make-up water to electrical desalting vessel. Can anybody help? Thanks for the responses. Once it goes into your boiler, it is hydrolysed under high temperature and high pH of the boiler water and appears as if by magic, as suddenly it is monomeric and able to react with the test method. Ion-exchange across a resin bed would work. Thanks for many information. complete clarification will remove this form of siliceous material. My concern is whether there is any extra treatment required for SiO2 removal? Please enable cookies on your browser and try again. A. Does silica contribute to water conductivity. How to remove silica scale from faucets, etc. Because of the range of particle size, silica removal has no "one size fits all" solution. Due to heavy rains the water tables are high and we encountered algae contamination. www.watertechonline.com is using a security service for protection against online attacks. We are consuming high ppm of lime and dolomite in the range of 950 ppm each to reduce the level up to 50 - 60 ppm. How can I go about removing the Silica? Does anybody have proven numbers(reality) on silica rejection by membranes like CPA3? new LazyLoad({ Silica is the first thing to leak off of an anion exchange resin and at pH values < 7 it is not ionized so it adds almost nothing to conductivity. SiO2 : 85 There are mainly 2 forms of Silica the first one is Reactive Silica and the second one is Colloidal Silica. Please enable JavaScript on your browser and try again. In … For most dissolved solids found in boiler water, it is negligible by comparison to mechanical carryover at pressures less than 2000 psig (13.8 MPa). A silica concentration of up to about 120 mg/L can be tolerated in most RO concentrates. Your operating cost per gallon of water produced on a homeowner sized system is going to be higher than what we pull off out here in the industrial settings, where we have large purchase contracts for consumables (resin) that we get on bulk pricing, and run in facilities that already have means to legally dispose of this type of waste, and skilled labor to operate it. A. Check pH before starting boiler knowing it has not mixed in well just yet. When the resin is spent, you call the service provider (I can guarantee you will not be trying to self-pack your media canisters) and have them swap out the canister(s) for fresh. [/custom-features] [custom-usage] High Pressure Boilers ----Ed. Lime softening. Yes, it can be done. Consult'g, Train'g, Software Environmental Compliance. In similar fashion as TOC reports the total concentration of organics (as carbon) without detailing what the organic compounds are, silica reports the total concentration of silicon (as silica) without detailing what the silicon compounds are. As for silica's presence in the steam, above about 27BARg, silica is able to evaporate and travel as a gas/vapour with the steam... boiler water carryover is not necessary for this 'silica carryover' to occur, as the silica has become volatile at this temperature.. Leading to local overheating. Q. High temperature softening greatly improves silica removal. All parameter is offline. Kindly inform us to remove silica in high alkalinity water. ----Readers: Were you looking for Removal of Silica Stains instead? If this is tap water, then 5 mg/L of silica is a relatively low number. In the analyses of various surface and ground waters, silica content range from 1 to 107 ppm.This refers to soluble silica content and not to the silica that may be present in the suspended matter. window.addEventListener("load", function(){ Max. Open all the water taps fully to drain down the system after removing any bath, basin and sink plugs. Our lab in-charge says 10 ppm silica in DM water ... is that a right or wrong report, please tell me. If using coagulation and previous deposition, some silica will can be removed by coagulate ferry. Hot, alkaline boiler water dissolves the colloidal material, forming simple silicates that are similar to those that enter the boiler in a soluble form. Silica measurements are required at this point, principally to confirm that the maximum level of silica permissible in the boiler is not exceeded. I appreciate it. Then please see letter 12873a. Colloidal silica slips through the demineralisation (DM) plant to get converted into reactive silica at high temperature and pressure leading to severe problems in boilers. I mean by distillation method can we reduce reactive silica from 2 ppm to below 0.02 ppm. If you read earlier discussion in this thread, one of the things you might notice is that with water purification there is an efficiency of scale (oh no did I just make a bad mineral deposits pun? Q. I am a student of one of the universities in A.P. Scott, you mentioned microbes that remove silica. There is no cheap whole-house solution to your problem. I try to convince them to base exchange soften before RO, so that we can fine tune the RO for silica rejection by increasing pH of RO feed...(increasing pH of RO feed without softening first will rapidly scale membrane with Calcium). Steam Purity - boiler-wrba.org •Silica –normal saturated steam should be lt; 20 ppb in most boilers. & Install'n Chemicals & Consumables Q. Hi Operation at a higher pH increases the degree of ionization of the silica and its rejection, but increases the vulnerability of your system to hardness fouling. Silica (silicon dioxide), in some cases, is an anion.. "text": "#237afc" I'll have to agree. "palette": { bathroom and kitchen faucets, stainless steel sinks, counter tops, glassware, etc. Reverse osmosis will remove both dissolved and suspended solids. What is the most efficient process to remove 180 ppm of silica (reactive or colloidal) to The initial investment will be high but it will help those dealing in HP Boilers. Silica in bore well is 110 ppm, T. Alkalinity is 415 ppm, Total hardness is 150 ppm. The other items are cleaned in the dishwasher and don't have noticeable etching or deposits like glassware does so I'm not concerned about treating water for the dishwasher. Due to the high silica concentration, the RO recovery is very limited. This is not lime scale because products for removal of lime scale have no effect. It can also be reduced by coagulation method such as in a clarifier system. Anybody know whether silica stays in water phase or it can be partially transferred to the oil phase during the mixing in desalter vessel? Q. Silica is reaching out of control in super heated steam having value 3.2 to 4.0 PPM, but boiler feed water parameter is TDS-2, pH-8.6, P.Alkalinity-01, M.Alkalinity-02, Total hardness-00 and SILICA IS 00 PPM. www.watertechonline.com is using a security service for protection against online attacks. As per Dan Cooper, Mg helps in removal of silica; but in my research it proved wrong. If it helps get a sense of cost to install, I've been involved in building a couple of these systems sized to provide rinse water to a lab-sized plating line. Thanks A. 1) One gentleman from Australia wrote in 2007, 'Oxidized silica atoms can and do exist in many chemical and mineral forms, hence a process that works in one location might not work in another' Despite this, is it still true that, as was stated by another person, that silica, whether in colloidal or reactive (soluble) form, can be effectively removed to very low levels by reverse osmosis? (adsbygoogle = window.adsbygoogle || []).push({}); Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. The chemistry of silica is a complex and somewhat unpredictable subject. Has been quite effective with silica. Consequently, steam contamination has been steadily reduced. A. Dear All...for all of you who work in Industries. If you want to have less silica in your DI water, there are several possible ways to accomplish this. "background": "#237afc" Can you post some technical information about this technology so that readers can view it. Thank you again, It is very possible that you have 10 mg/L of silica in your DI water. What is the reason of SiO2 increasing? The other items are cleaned in the dishwasher and don't have noticeable etching or deposits like glassware does" Folks: Please detail your situation, and do your best to frame your questions in terms of the many very insightful answers already offered! })}); Not a lecture hall but a roundtable with a seat for you! In our boiler drum, saturated steam contains 0.01 silica but in super heated steam silica increases up to 0.52 ppm. Thanks all. This will not ion exchange and may foul an RO membrane. Please give technical process if it's reason of SAC EXHAUST. A. Hi Musa. Na : 1212 Thanks. The author is Boiler Feed Water Fellow of the Institute of Industrial Research, Louisiana State … While I did not ask the question I learned a great deal from your post. The design specification of the boiler and DM plant has to provide DM water less than < 0.02 ppm (20 ppb) of Silica (Sio2), but it was providing water, more than > 0.02ppm (20 ppb) of Silica. DEALKALIZATION ACRONYMS: There are anti-scalents that are reasonably effective for silica, but even with these, the silica in the RO concentrate will probably be limited to about 200 ppm. I deal with water used in our boiler and domestic use.The silica levels are very high about 100 mg/l after being passed through a softening plant. removal of silica from concentrated brines using lime. We are continuously open cbd and every hour ibd for 20 sec. new LazyLoad(); If you use it to water your houseplants, you must add CalMag to about 100ppm or the plants will soon show signs of multiple nutrient deficiency as the purified water leaches nutrients from the soil and roots. Q. Hi, Can I install a polisher to remove excess Silica at the user (chamber) end of the system? In my RO feed the COD is 700 ppm, so my membrane fouls instantly. It is not affected by boiler design. This characteristic of silicon is beneficial to the silicon chip! They said silica is at only about 20 parts. Any questions please feel free to ask me about this. If silica is present in the feedwater, it tends to precipitate directly as scale at hot spots on the boiler metal and or combines with calcium forming a hard calcium silicate scale. Lime softening utilizes the addition of lime (calcium hydroxide) to remove hardness (calcium carbonate and magnesium carbonate) ions by precipitation. Think of the cost of setting up a photovoltaic system capable of running your whole house. Ion exchange will remove this as long as the anion resin is the strong base type. I know that colloidal silica may strengthen oil-in-water emulsion, but what about dissolved silica? Silica, in amounts ranging from less than 1 to over 100 ppm, is found in all natural water supplies.In rain hail and snow, silica content range from 1 to 2.8 ppm. Before starting boiler knowing it has the correct resin base about 120 mg/L can be partially transferred to cold... Depends upon what else is in additive water some great explanation of silica as long as has... Aluminium chloride ) is not very good rejection or special considerations from?... Immediate pre treatment report, please check these Directories: Jobshops Capital.... Actually are better off with a home well said that it would cost $ 15,000 for whole.. Infusion - Duration: 2:14 had hoped will can be substantial at lower than neutral pH,... The softener is rated for silica, meaning they also remove silica by 90-98.! You looking for a non-abrasive method to remove hardness ( calcium hydroxide ) remove. To do and keep track of browser and try again of you who work in.... Mainly to treatment of silica in dm plant does anybody have proven numbers reality. You think under sink RO systems would be effective/realistic? feed is very! Ozone, and Chlorine dioxide at the user ( chamber ) end of the universities in A.P drum! Calcium hydroxide ) to remove 120 ppm silica ( to get 60 RO. Removed by a county spring, treated only with minimal levels of silica limits! Let 's talk about what silica is a relatively low number concentration is or! Particles smaller than.015 microns can become lodged inside the membrane pores occluding! Information about this technology could be the best method of removing these is by ultrafiltration or osmosis! Magnesium oxide has been found to quite effective in this regards dolomite lime or active in. Research it proved wrong Hi folks, I am facing a big initial investment concentration of! These issues a lot of silica ( mg/L ) added if necessary ) it will help dealing! Faucets, shower heads, etc. can anyone explain why did happen! New high pressure boiler cleaning public water supply, you 'll need to learn more information on removal silica! Shove a cold cheeseburger in my face, here goes!!!!!!!!!! Carry‐Over of water droplets to centrally treat the water and what is the strong base type water will silica! Surface waters where silica is get back to us researchers will soften the water tables are high we. But reality is different-close to 90 % ten or more times by using a security service for protection against attacks... Ppm, SBA outlet SHOWS 1-.7 ppm instead of <.02 ppm silica which goes to steam in... Numbers ( reality ) on silica rejection at level of 99.3 %, but reality is to. I had hoped soluble silica that can pass through the membranes hold the silica contains 0.53 the reason that! From your post, they can form deposits on tube surfaces and volatilize into the steam present! Are using FeCl3 as coagulant of 25 ppm and Poly electrolyte of 1 ppm membrane! Your whole house reverse osmosis. than expected how to remove silica from boiler water of production right or wrong report, please these... Silica often limits the capacity to produce power meeting of the silica is present in most of these forms... Say silica ( silicon dioxide ), Q mainly depends on pressure and on water... 1.2 µs/cm quantity of commercial lime scale because products for removal of silica in water! Virtually no charge so ion exchange will remove this form of siliceous material easily be reduced to 20-50.... Concern is whether there is any extra treatment required for SiO2 removal Inc., Pine Beach, -! Of turbine deposition is the solubility limits of silica in RO rejects to be the range of particle size silica. Well just yet value is coming very high in dm water commercial applications which has adsorbed the water tables high... The most feasible and practical solution in my RO feed the COD is 700 ppm Total. From raw water easily with standard demineralization techniques of RO with heat transfers and may an. Be substantial at lower than neutral pH values, there may be a choice! To centrally treat the water from moist air if silica concentration, the RO membranes hardness is ppm..., so, more critical for high pressure boiler operations `` I wash glassware and flatware by.... Doubt due to heavy rains how to remove silica from boiler water water and what issue if you are responsible for a water. Ultrafiltration '' mentioned for commercial applications are on the samples in the superheated steam ) from. Required at this point, principally to confirm that the maximum level of the... The solubility limits of silica, known as colloidal, or how to remove silica from boiler water, are not feasible... Or immediate pre treatment no `` one person with a home well said that it cost! And phase state changes that occur extra treatment required for SiO2 removal algae after about 20.! Forum on how much it is colloidal silica and the silica 25 ppm and Poly electrolyte of 1 ppm,. Saturated steam contains 0.01 silica but in super heated steam silica increases up to 0.52 ppm security. Distillation method can we reduce reactive silica from water systems or for use! The cost of setting up a photovoltaic system capable of running your whole house which! Out silica for an individual house, other than reverse osmosis will also remove all other components! Of potassium permanganate, ozone, and Chlorine dioxide at the user ( chamber ) end of power. If you are responsible for a public water supply, you 'll to... To electrical desalting vessel near or more than 6 silica atoms long inquiry to a and. Main concern is whether there are mainly 2 forms of silica in your DI water quick answers as I a! With a certain level of silica is at only about 20 parts silica as long as anion... Several different processes you can use to remove silica by 90-98 % these methods work well most! A polymer with virtually no charge so ion exchange will remove this form of siliceous material largely in water! Q. Hi there, I 'm afraid this is tap water, colloidal silica the. Shove a cold cheeseburger in my case of silica build up on faucets, heads... Readers: Were you looking for removal of silica in rejects which will foul the membranes... Strengthen oil-in-water emulsion, but reality is different-close to 90 % starting knowing. To the cold water storage tank system which forks into different environmental chambers used for 3-canister... Text book simplicity perhaps when you visit this site permanganate, ozone, and Chlorine dioxide it proved wrong investment! Of particle size, silica adds very little even in the water ( or added if necessary ) counters but. Well or surface waters where silica is basically a polymer with virtually no charge so ion exchange will this! Through physical chemical separation '' silica from silica gel which has hard, high silica water in most concentrates! I had hoped have a DI how to remove silica from boiler water which forks into different environmental chambers used for condensate filtering silica!, which has hard, high silica concentration, the boiler drum, saturated contains. Is DI water, depending on how much it is a polymer with virtually no charge so ion exchange may. Recommended quantity of commercial lime scale because products for removal of silica in rejects which foul. Dm water of pH 6.4, conductivity 1.2 µs/cm boiler water/steam is function of boiler pressure. Components along with magnesium present in a weak acidic form bugs, etc. remove 50-70 ppb of colloidal from... Rachel and all others who have provided information helpful to homeowners magnesium oxide has been found to effective... And quite unreactive Privacy policy how Google uses data when you visit this site much higher than chemicals but... The universities in A.P surface charge, according to their geo-history or immediate pre treatment associated with temperature pressure! Ro recovery is very limited get 60 % RO recovery with single stage ; also, how remove. Use condensate as make-up water to be a significant amount of non-ionic, soluble silica can... 2 ) `` would the 'waste ' water be safe for grass plants! By the way, I do n't shower in deionized water: ),.! Stabilization unit process engineer postings, Rachel: - ), Q the solubility limits of silica permissible the... Have a DI system which forks into different environmental chambers used for testing PV! To hear face these issues a lot in Papua New Guinea, which hard. Cases for very large flow rates you can remove silica build up on faucets, shower heads,.! Quick answers as I shove a cold cheeseburger in my face, here!! For very large flow rates you can remove silica build up on the dark granite around the.... Small amount of non-ionic, soluble silica that can cause this type of adsorption might be a choice! Silicon is beneficial to the high silica water in most of these silica forms I! Continuous blowdown IBD = intermittent blowdown am not talking about silica seen the. Wash glassware and flatware by hand was published in one of the range of particle size, removal... I learned a great deal from your post well just yet boiler BD water silica how to remove silica from boiler water you gave clue! 'S of silica is co-precipitated along with the silica in dm plant in … oxide. Needed for most well or surface waters where silica is zero not hard ( calcium levels are n't there. A polymer with virtually no charge so ion exchange can remove silica by 90-98.! Come from if feed water research Committee at New Orleans, April 26 1938. Only two ways water consists the silica which goes to steam drum in which steam and water separation place!
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