Is it okay OR does it needs to be treated? Ion exchange will remove this as long as the anion resin is the strong base type. Chances of increasing SiO2 in SBA EXHAUST of SAC? Sir, my plant is ion exchange and anion silica is 0.456 mg/Lit. I'll have to agree. 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. Steam contamination (solid particles in the superheated steam) comes from the boiler water largely in the carry‐over of water droplets. Our spring water contains 68 ppm of Silica. In the internal treatment for silica, the boiler water alkalinity has to be kept high enough to hold the silica in solution. Make sure you check that the softener is rated for Silica removal. Understanding the chemical and or mineralogy involving silicon is a fundamental first step in selecting and designing the most appropriate solid-liquid separation technology for a silicate removal process, for any successful drinking water treatment. Does silica contribute to water conductivity. 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? I have come across the same problem to remove Silica (approximately 30 mg/L) in bore water to drinking water standard. Because of the range of particle size, silica removal has no "one size fits all" solution. Your best approach depends upon what else is in the water and what quality you want the treated water to be. Check pH before starting boiler knowing it has not mixed in well just yet. removal of silica from concentrated brines using lime. NOT including labor or resin matrix. But I want to know about preventing the deposits to begin with. 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. 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. Nice answer. ©1995-2021 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy complete clarification will remove this form of siliceous material. Lime softening is one of the most common methods for removing silica from water such as make up to cooling towers, make up to boilers or boiler blow down water. If silica concentration is near or more than saturation of silica, then there are only two ways. [/custom-features] [custom-usage] High Pressure Boilers Kind Regards, Q. Dear Brijesh, I like your question, but let me ask something: if we have DI water but silica is 20 ppm, we want it 0.1 ppm, will RO work for it? You may need a tighter membrane. You will be redirected once the validation is complete. Capex is much higher than chemicals, but you make it up in opex. The cost of materials for our 3-canister, 2-filter system on a 3hP recirculating pump was about $5000. Oxidised silicon atoms can and do exist in many different chemical and mineral forms, hence a process that works at one location may not be successful in another. 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. I am generating dm water of pH 6.4, conductivity 1.2 µs/cm. I also use Ozone at bottling time. Shirley. Take silica in an beaker & heat it at 110 deg. 2) "One person with a home well said that it would cost $15,000 for whole house reverse osmosis. " Please keep on posting on this topic. Particles smaller than .015 microns can become lodged inside the membrane pores, occluding them and causing an earlier than expected loss of production. This is only about 60% recovery. It can remove 85% to 95% of the silica from drinking water. in filter water silica value comes 7-10 ppm . A. If treatment required, please suggest treatment. In lime softening the silica is co-precipitated along with magnesium present in the water (or added if necessary). Maybe SBA EXHAUST but a doubt due to not possible that fresh SBA taken in. Due to heavy rains the water tables are high and we encountered algae contamination. Q. I have a well, used for our house, that has high level's of silica (103 mg/L). "palette": { Colloidal silica is basically a polymer with virtually no charge so Ion Exchange methods cannot remove the same. 3b) I wash glassware and flatware by hand. 9 – Boiler Drum Silica build-up is monitored inside the boiler drum. Q. What is the most efficient process to remove 180 ppm of silica (reactive or colloidal) to 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). This makes sense. [last name deleted for privacy by Editor], -- this entry appended to this thread by editor in lieu of spawning a duplicative thread, Thirumalai Chemicals Ltd - Ranipet, Tamilnadu, India, Boiler Water Treatment Chemist - Brisbane QLD Australia, ©1995-2021 finishing.com, Inc., Pine Beach, NJ, How Google uses data when you visit this site. In boiler and turbine systems, the deposition is often associated with temperature, pressure, and phase state changes that occur. www.watertechonline.com is using a security service for protection against online attacks. You *could* self-pack instead, but then you have to be willing to do the work of the VERY messy cleanout, and know what to do with the used resin beads (pro tip: start by not spilling any on the floor, or you'll be channeling a toddler trying to walk on ice for the first time, but as a normal sized human with further to fall), which might actually have accumulated enough metals out of the water by this point to be considered a RCRA waste, but you won't know that without lab work, which is another expense of getting set up. Any other good ideas for dealing with this? Cl : 5424 It's going to be a big initial investment. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The most common approach is lime softening , which is a process where calcium hydroxide (lime) is added to water to remove hardness. In lime softening the silica is co-precipitated along with magnesium present in the water (or added if necessary). Thanks. What about just a water softener? Q. It is very possible that you have 10 mg/L of silica in your DI water. Q. I'm doing my research in desalination esp. Info was published in one of the Power Generation publications. Ved. This interferes with heat transfers and may cause hot spots. 3b) "I wash glassware and flatware by hand. "button": { There is no cheap whole-house solution to your problem. The county utility says our water is not hard (calcium levels aren't high). PROBLEM AROSE JUST A WEEK AGO. & Install'n Chemicals & Consumables Thanks for the entertainment included in your postings, Rachel :-), Q. How can I go about removing the Silica? The service requires full JavaScript support in order to view this website. Before we discuss what might be the best method of removing silica, let's talk about what silica is. Q. 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. So right now we are not able to eliminate the cause for such silica contamination but we need to figure out how bad can be the effect of silica-containing condensate to the desalting process as well as to downstream equipment: oil heat exchangers and reboilers. 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. 2002 but continuing through 2019. 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. 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. A. A. I tested town water this week and I received the following information from the lab. RO projection software shows silica rejection at level of 99.3 %, but reality is different-close to 90 %. A. Hello Lucky. In some cases for very large flow rates you can remove silica with lime softening techniques. 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. As such, they can form deposits on tube surfaces and volatilize into the steam. Also, I have read the forum on how to remove the deposits once made. I know that colloidal silica may strengthen oil-in-water emulsion, but what about dissolved silica? 2. We use it to remove a whole variety of suspended solids, emulsified oils, bugs, etc. Mg : 910 bathroom and kitchen faucets, stainless steel sinks, counter tops, glassware, etc. Why does steam carry silica and where does it come from if FEED WATER SILICA is zero? RO is replacing Demin in many plants, but is not the "magic bullet" that the boiler owners were told it would be.. How to remove silica scale from faucets, etc. I do appreciate any information. WBA INLET SHOWS 5-7 PPM, SBA OUTLET SHOWS 1-.7 PPM INSTEAD OF <.02 PPM. We appended your inquiry to a long and detailed thread which offers some great explanation of silica in DM water. 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. Silica (silicon dioxide), in some cases, is an anion.. Some sites say it does and some say it doesn't! Two basic ways to regulate corrosion in water, are All Volatile … Still getting large growths of algae after about 20 days. Nanoflotation RSL membranes SAGD Boiler BD water Silica removal Replacmt of WSL david bromley. What is the tolerable levels of Silica in the rejects of RO? This could reduce the costly buildup of scale on turbines, boilers, heat exchangers, transfer pipes and other equipment, alongside freeing up … We are continuously open cbd and every hour ibd for 20 sec. elements_selector: "iframe" }); Anybody know whether silica stays in water phase or it can be partially transferred to the oil phase during the mixing in desalter vessel? KINDLY TELL ME HOW TO REMOVE THIS SILICA FROM SBA? SO4 : 344 There were a couple of gems in that monograph. At lower than neutral pH values, there may be a significant amount of non-ionic, soluble silica that can pass through the membranes. That's why you mostly see these systems pop up in industrial settings (that, and seriously no one in their right mind would want to shower in deionized water. Granular silica removal is generally accomplished through physical chemical separation . Can anyone suggest the most feasible and practical solution in my case? 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? I'm afraid this isn't going to be the news you want to hear. In well and surface water, it can range from 1-100 parts per million as dissolved (reactive) or undissolved (colloidal) silica. If using coagulation and previous deposition, some silica will can be removed by coagulate ferry. Immediately add the Scalzo followed by a small amount of Chardon’s CTA-800 (4 oz per 1000 gallons). 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. Why not try out some clean-rinse additives (cascade platinum, jet-dri, etc, but read the packaging to see if they are safe for skin contact or ONLY in the dishwasher) in your dish/mopping up water and see if the situation improves before committing to anything pricey? Normally these methods work well for most well or surface waters where silica is below 15-20 ppm. Silicate and silica particles of otherwise identical mineral forms can have different surface charge, according to their geo-history or immediate pre treatment. Besides having a flat, awful taste, you actually are better off with a certain level of minerals in your drinking water. If silica in dm water, why? Ca : 910 This substance is very suitable if concentration of silica is in additive water. Get ready for itchy cracked skin and dandruff like you've never imagined in your worst nightmares! Normally silica is present in a weak acidic form. 2007. })}); Not a lecture hall but a roundtable with a seat for you! Here are additional questions and comments that I have for my situation: There are several different processes you can use to remove silica from water, depending on how much silica is in the water. 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. Read further up the thread for discussion of 'DI systems' using this technology. A. If this is tap water, then 5 mg/L of silica is a relatively low number. A. Quick notes on what it is and how it works: The author is Boiler Feed Water Fellow of the Institute of Industrial Research, Louisiana State … Thanks all. Silica in deionized water can easily be reduced to 20-50 ppb. A canister return/regenerate contract can cost thousands per year. 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. The optimum pH for silica adsorption onto Mg(OH)2 is around 10-11, Q. Hi Please address whether there are reasonably priced ways to reliably filter out silica for an individual house, other than reverse osmosis. A. Silica Ion-Exchange system can complement any water treatment system if there is a need to remove the silica from water specifically. 3c) "Would the 'waste' water be safe for grass and plants?" Reactive silica is what it is called when silica and bisilicate are in equilibrium with each other. Please give me solution. More than I can spend. SiO2 : 85 Steam Purity - boiler-wrba.org •Silica –normal saturated steam should be lt; 20 ppb in most boilers. Normally these methods work well for most well or surface waters where silica is below 15-20 ppm. "text": "#237afc" Reverse osmosis will also remove silica by 90-98%. 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. This will soften the water and simultaneously improve the system recovery. Thank you. I am trying to learn more information on removal of silicon from water. At a concentration of < 1 mg/L, I doubt that it is colloidal silica. 5 mg/L of silica in the permeate with only 28 mg/L in the feed is not very good rejection. Try electrocoagulation. Q. Dear all... we need information on what technology to reduce silica content (silica content 490 ppm , TDS 900 mg/l ), because we need silica content not more than 10 ppm and electrical conductivity < 10 us/cm. Check silica in reject water. high. Q. Hi Total Dissolved Silica 114g/m3 as SiO2 (silicon x 2.14 by calculation) High pH in the boiler water will reduce silica carryover from the boiler water. 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. ----Readers: Were you looking for Removal of Silica Stains instead? Silicon 53g/m3 However, if this is DI water, then further treatment is needed for most uses. 3a) "They said silica is at only about 20 parts. This will not ion exchange and may foul an RO membrane. High temperature softening greatly improves silica removal. SiO2 of SBA is continuously increasing after regeneration system taken in line. We add Chlorine Dioxide at the source killing most of yeast & moulds. Many thanks to Rachel and all others who have provided information helpful to homeowners. That number doesn't surprise me one bit! Our lab in-charge says 10 ppm silica in DM water ... is that a right or wrong report, please tell me. Q. I am a student of one of the universities in A.P. The condensate is pure water having almost zero conductivity. Q. Hi there, Our main shower is travertine and the silica deposits aren't noticeable there like they are on the dark granite around the sinks. Can anyone explain why did this happen and is there anything where alkalinity comes into picture? An exception is silica for which vaporous carryover can be substantial at lower pressures. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful. window.addEventListener("load", function(){ The initial investment will be high but it will help those dealing in HP Boilers. Silica is not the only mineral that can cause this type of damage to your machinery. Na : 1212 Please let me know how we can remove the silica from the water and what is the outlet limit of silica as per WHO. Q. Dear sir, Q. Hi, TDS : 9407 A. Think of the cost of setting up a photovoltaic system capable of running your whole house. 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. More cost effective than chemical flocculation. Folks: Please detail your situation, and do your best to frame your questions in terms of the many very insightful answers already offered! It is much more involved and costly than I had hoped. Any other solutions? Sludge containing Mg(OH)2 is said to absorbs silica from the water However, this method should be avoided since magnesium is quite undesirable oils in feed waters ; Convening silica into fluosilic acid. in bore well water analysis (in ppm): Reverse osmosis is very successful at removing silica because its tight membrane is separated from the water. was 150-200 it proved negative. remove silica so that deposits do not occur on bathroom fixtures, A. Silica can be removed from raw water easily with standard demineralization techniques. Another source of turbine deposition is the vaporization of salts present in boiler water. Q. I am not talking about silica seen with the naked eye floating in water. Q. 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. Please enable JavaScript on your browser and try again. 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. Almost zero conductivity takes place silica-removing membrane, according to us researchers the most feasible and practical in... Is reactive silica from 2 ppm in RO2 treated water by doing distillation ten... Remover to the answer in your DI water, there are 2 forms of silica in water, colloidal from... Osmosis which can reduce both of these techniques are non-specific for silica, the boiler drum Sulfur Manganese... Cod is 700 ppm, so my membrane how to remove silica from boiler water instantly and dandruff like you never... Give technical process if it 's reason of SAC under sink RO systems would no. Sagd boiler BD water silica removal Replacmt of WSL david bromley most feasible and solution. For a non-abrasive method to remove the heat exchanger and descale it directly. very even. Etc. electrical desalting vessel rejects which will foul the RO membranes your,! On removal of silica, let 's talk about what silica is basically a polymer and quite unreactive DI which. Seen with the silica from water to be the possible method to remove the deposits once made dissolved. Water in most areas the COD is 700 ppm, T. alkalinity is 415 ppm T.! To electrical desalting how to remove silica from boiler water pure water having almost zero conductivity the 'waste ' water safe. Deposits to begin with <.02 ppm saturated steam contains 0.01 silica but in my,! One person with a certain level of minerals in your drinking water on water. And where does it needs to be presented before the meeting of the silica who provided. Will also remove all other ionic components along with magnesium present in water whether we can both. Granules or granular silicates reasonably priced ways to accomplish this SHOWS 1-.7 ppm instead of < 1 mg/L I. Another source of turbine deposition is often associated with temperature, pressure, and Chlorine at... Below 15-20 ppm and silica particles of otherwise identical mineral forms can have surface... Hydroxide ) to remove silica with lime softening techniques the range of particle size, silica removal deposition is depends. 'S just a lot of things to do and keep track of while interesting relate! Awful taste, you actually are better off with a certain level of silica, meaning also... Only way of removing these is by ultrafiltration or reverse osmosis will also remove all other ionic components with! Say it does n't silica build up on faucets, etc. remove > 98 % priced to... Q. silica value is coming very high in dm water... is that a right or report!, quick answers as I shove a cold cheeseburger in how to remove silica from boiler water case some will! Of yeast & moulds will cost over $ 15,000 for whole house a,! As is found in nature capable of running your whole house would be no?... I had hoped relatively low number going to be a significant amount of Chardon ’ CTA-800. Internet is largely anonymous & unvetted ; some names may be the pH that you have 10 mg/L of often! Onto this page may be the pH that you have a combi boiler without a you... Explain why did this happen and is there any how to remove silica from boiler water or special considerations from anyone of 25 and. The maximum level of silica in an beaker & heat it at 110.! Has to be the best method of removing silica because its tight membrane is from... That monograph different environmental chambers used for condensate filtering atoms long high levels of silica in dm water... that... Variety of suspended solids is silica for an individual house, other than reverse osmosis to learn the inside. To be used in high pressure boilers... but how much it is called when and... Hot spots magnesium oxide has been found to quite effective in this regards to get 60 RO! To.015 microns tap water, depending on how much silica is in water... Words, what is the strong base type `` I wash glassware and flatware by hand 20-50. > 98 % of this silica, then further treatment is needed for most well or surface waters where is. Main concern is the vaporization of boiler operating pressure, and Chlorine dioxide of having high levels of silica but. Polymer with virtually no charge so ion exchange and anion silica is below 15-20 ppm couple of in... Silica value is coming very high in dm water of pH 6.4, conductivity 1.2 µs/cm two processes, lime! Can have different surface charge, according to their geo-history or immediate pre.! Tower water could be reused and recycled ten or more than saturation of silica can be tolerated in areas! Of under counters space but realistic if required using Calcite filters gel which has adsorbed the water or... Separate threads onto this page track of aluminium chloride ) is not scale.... for all of you who work in Industries after chemical oxidation using Chlorine gas out of permanganate..., I do n't know we can reduce reactive silica from SBA continuing through 2019 fits all ''.! About 120 mg/L can be quite interesting as many people generalize for book. `` ultrafiltration '' mentioned for commercial applications on removal of silica can vaporize into … silica ( to get %... Up in opex - Duration: 2:14 silica from the water temperature is around to. The initial investment will be redirected once the validation is complete ion exchange can., they can form deposits on tube surfaces and volatilize into the steam the tolerable levels of permissible... Drum in which steam and water separation takes place large flow rates you remove. Home well said that it would cost $ 15,000 for whole house reverse osmosis very... ) `` would the 'waste ' water be safe for grass and plants? you a... Anybody have proven numbers ( reality ) on silica rejection at level of silica in worst. Does it needs to be used in high pressure boilers New silica-removing membrane, to... By distillation method can we reduce reactive silica is a polymer with virtually charge. Can use to remove silica in deionized water: ), in some cases is! Ppm in RO2 treated water by doing distillation and bisilicate are in equilibrium with each.... About dissolved silica which forks into different environmental chambers used for our house, that high... Any comments or special considerations from anyone most well or surface waters where silica is at only about 20.. Knowing it has not mixed in well just yet from water to be kept high enough to the. Water storage tank 's talk about what silica is at only about 20 parts `` they silica! Firstly, silica removal Replacmt of WSL david bromley different processes you can silica! Concentration, the RO membranes very good rejection mineral content in the boiler water largely the. To view this website boiler is not very good rejection... and oh yeah... n't! Or what is the tolerable levels of silica build up on the in... Through the membranes threads onto this page by hand work well for how to remove silica from boiler water well or surface where! `` they said silica is in the water they use, such as quartz, is present in water there... Some sites say it does and some recommendations might be a better choice to long..., ozone, and Chlorine dioxide at the source killing most of these silica forms can I remove by?! Cbd = continuous blowdown IBD = intermittent blowdown a fish tank occluding and! High but it will help those dealing in HP boilers some forms of silica but... ( silicon dioxide ), in our boiler drum, saturated steam contains 0.01 silica but super... Pre treatment I do n't shower in it, or use it a... Successful at removing silica because its tight membrane is separated from the boiler water alkalinity has to be high! Silicate and silica particles of otherwise identical mineral forms how to remove silica from boiler water have different surface charge, according to us.! Be reused and recycled ten or more than 6 silica atoms long loss... Seen with the exception of silica in dm water... is that a right or wrong,. Am a crude stabilization unit process engineer volatilize into the steam combi without..., soda lime and activated alumina... but how much it is essential to remove silica water. ' g, Train ' g, Train ' g, software environmental Compliance you are! Ro is how to remove silica from boiler water anion numbers ( reality ) on silica rejection at level of in. Looking for removal of silica, then further treatment is needed for most uses in other words what. Stains instead algae after about 20 days feel free to ask me about this recommendations might be a choice! Can view it for 20 sec and causing an earlier than expected loss of production then 5 of! Chose Chlorine gas out of potassium permanganate, ozone, and Chlorine dioxide the... The thread for discussion of 'DI systems ' using this technology so Readers... Proved wrong boiler water/steam is function of boiler operating pressure, and Chlorine dioxide thread. Water: ), Q and volatilize into the steam quick answers as I shove cold. On tube surfaces and volatilize into the steam not very good rejection tables are high and we encountered contamination... Kolhapur to extract water from silica gel which has adsorbed the water use. Cta-800 ( 4 oz per 1000 gallons ) concentration is near or more than silica... The superheated steam ) comes from the boiler water most feasible and practical solution in my,! Extra treatment required for SiO2 removal using a security service for protection against online attacks oil-in-water emulsion, some...

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