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After sales service

Zibo Dongda Chemical Co., Ltd. Contact address: Room 1-905, Huijin Building, Lutai Avenue, Zhangdian District, Zibo City Domestic Sales: 0533-2183539
Sales Manager's Office Phone: 0533-2159621
Domestic sales email: dongdashuzhi@126.com
Foreign sales: 0533-2159617
International Trade Email: zhaijinghua@sina.com

Resin preservation

Instructions for use of ion exchange resin

  1. Resin filling

    、彻底清洗、清扫离子交换器和水力装卸器,检查各流通部位,不得跑漏树脂,各布水装置正常,交换器水压试验合格。 1. Thoroughly clean and clean the ion exchanger and hydraulic loading and unloading device, check the circulation parts, do not leak resin, the water distribution devices are normal, and the water pressure test of the exchanger is qualified.

    1. Before filling the resin, pour a layer of water into the exchanger at a height of about one meter to prevent the resin from directly hitting the bottom device and cushion of the exchanger. When filling the resin with a hydraulic loader, fill the cation resin with clean water and the anion resin with demineralized water. During manual filling, care must be taken not to put packing bags, certifications and other debris into the exchanger, so as not to affect the water production.

    2. Fill the resin according to the design requirements. After measuring the resin height to meet the requirements, close the exchanger, perform a large backwash on the resin layer, thoroughly clean the resin, settle, drain, and level the resin layer. If the resin layer height is not reached, Then open the exchanger and continue filling to the design height.

  2. Pretreatment of resin

    In the industrial production of ion exchange resins, they often contain a small amount of organic oligomers and monomers that have not participated in the reaction, as well as some inorganic impurities such as iron, lead, and copper. New resins must be pre-treated to remove them before they are applied to avoid the initial operation Affect effluent water quality. The specific processing method is as follows:

  3. Backwash: Backwash the resin layer with water, the expansion rate is 50-70%, until the effluent is clear, no odor, no impurities, and no fine resin.

    、 用稀盐酸处理:用约2-3倍树脂体积的约5%左右的盐酸溶液向交换器内边打边排,控制流量流速2-4m/h,进完后浸泡不少于4-8小时,然后用纯水洗至中性为止,冲洗流速10-20m/h。 2. Treatment with dilute hydrochloric acid: Use about 2-3 times the resin volume of about 5% of the hydrochloric acid solution to drive the inside of the exchanger, control the flow rate of 2-4m / h, and soak not less than 4- 8 hours, then washed with pure water until it is neutral, and the flow rate is 10-20m / h.

    、用稀氢氧化钠处理:用约2-3倍树脂体积的约4%左右的氢氧化钠溶液向交换器内边打边排,控制流量流速2-4m/h,进完后浸泡不少于4-8小时,然后用纯水洗至中性为止,冲洗流速10-20m/h。 3. Treatment with dilute sodium hydroxide: use about 2-3 times the resin volume of about 4% sodium hydroxide solution to drive the inside of the exchanger, and control the flow rate of 2-4m / h. Less than 4-8 hours, then wash with pure water until it is neutral, and the flow rate is 10-20m / h.

    If the acid-base treatment can be repeated 2-3 times, the effect will be better, and the stability of the new resin will be significantly improved after treatment.

    Regeneration of resin

    、反洗:清水反洗树脂层,展开率50-70%,至出水澄清、无气味、无杂质、无细碎树脂为止。 1. Backwash: Backwash the resin layer with fresh water, the expansion rate is 50-70%, until the effluent is clear, no odor, no impurities, and no fine crushed resin.

    、单床逆流再生方法 2.Single-bed countercurrent regeneration method

    Regeneration of strong acid (weak acid) cation resin:

    (1) Drain: Open the exhaust valve and the middle row, and drain all the water above the middle row.

    (2) Regeneration: use about 2-3 times the resin volume of about 3-5% hydrochloric acid solution, and discharge while controlling the flow rate and flow rate of 3-5m / h. ) Stop counting after 40-60 minutes.

    (3) Replacement: After entering the regeneration solution, continue to rinse with pure water and the regeneration flow rate, and the waste solution is also discharged from the middle row for about 30-40 minutes.

    (4) Full water: drain the water from it, fill the upper space with water from the air valve, and then close the middle water valve and air valve.

    (5) Positive washing: Open and operate the water inlet valve and drain valve, and perform the positive washing at a flow rate of 10-20m / h until the water is qualified.

    Regeneration of strong base (weak base) anion resin:

    (1) Backwash: fully backwash the resin layer at a flow rate of 10-20m / h, the resin expansion rate is 50% -100%, and backwash until the effluent is clear.

    (2) Drain: Open the exhaust valve and the middle row, and drain all the water above the middle row.

    (3) Regeneration: use 2-4% NaOH solution of 2-3 times the resin volume to discharge into the exchanger while controlling the flow rate of 3-5m / h. The test strips are black.) Count, stop after 40-60 minutes.

    (4) Replacement: After entering the regeneration solution, continue to rinse with pure water and the regeneration flow rate, and the waste liquid is also discharged from the middle row for about 30-40 minutes.

    (5) Full of water: The upper space is filled with the water discharged from it. After the air valve is out of the water, close the middle water inlet valve and air valve.

    (6) Positive washing: Open and operate the water inlet valve and drain valve, and use the water from the male bed (carbon remover) to clean at a flow rate of 10-20m / h, and wash until the conductivity is qualified.

    、单床顺流再生方法 3.Single-bed downstream regeneration method

    Regeneration of cation resin

    (1) Regeneration: use 2-3 times the volume of resin solution of about 3-5% hydrochloric acid, while discharging while controlling the flow rate of 3-5m / h. (Redness) Stop counting after 40-60 minutes.

    (2) Positive washing: Use the incoming water to perform a positive washing at a flow rate of 10-20m / h until the effluent is qualified.

    Regeneration of anion resin

    (1) Regeneration: use 2-4% NaOH solution of 2-3 times resin volume to drain into the exchanger while controlling the flow rate of 3-5m / h. The test strips are black.) Count, stop after 40-60 minutes.

    (2) Positive washing: Use the effluent of the positive bed (carbon remover) to wash at a flow rate of 10-20m / h, and wash until the conductivity is qualified.

    、混床再生方法 4 , mixed bed regeneration method

      1 )反洗分层:用除盐水以 10-20m/h 的流速充分反洗树脂层,展开率 70-100 %,反洗 15-20 分钟,缓慢关闭进水阀,待树脂自由沉降,阴、阳树脂会由于各自密度不同出现明显的分层,如分层不好须重新反洗,直至出现明显的分层为止。 ( 1 ) Backwash layering: fully backwash the resin layer with demineralized water at a flow rate of 10-20m / h , the development rate is 70-100 %, backwash for 15-20 minutes, slowly close the water inlet valve, and wait for the resin to settle freely. Yin and yang resins will have obvious delamination due to their different densities. If the delamination is not good, they must be backwashed until obvious delamination occurs.

    再生:阴树脂再生:以约 3-4 倍树脂体积的 2-3 %的 NaOH 再生液从上部进入进行再生,流速约 2-4m/h ,废液由中排排出,同时阳树脂再生:以约 3 倍树脂体积的 2.5-4 %的 HCL 再生液从下部进入进行再生,流速约 2-4m/h ,废液亦由中排排出,再生时间不少于 60min ;废液由中排排出。 (2) Regeneration: Anion resin regeneration: 2-3 % of the resin volume of 2-3 % NaOH regeneration solution enters from the top for regeneration, the flow rate is about 2-4m / h , the waste liquid is discharged from the middle row, and the cation resin Regeneration: 2.5-4 % HCL regeneration solution with 3 times the resin volume enters from the bottom for regeneration, the flow rate is about 2-4m / h , the waste liquid is also discharged from the middle row, and the regeneration time is not less than 60min ; the waste liquid is from the middle Drain.

    置换:阴阳树脂同时从上下进行冲洗,从中排取样 PH 近中性,电导率 <20us/cm 止,硬度为零,硅 <50ug/l, 时间约 30-90min (3) Replacement: Yin and Yang resins are washed from above and below at the same time, and the PH from the middle row is sampled near neutral, the conductivity is <20us / cm , the hardness is zero, the silicon is <50ug / l, and the time is about 30-90min

    混匀:将水排至树脂层上约 5-250px 处,用 0.10-0.20MPa 压缩空气进行混匀,时间约 2-5min ,停气同时进行快速放水,防止树脂由于重力不同而重新分层。 (4) Mixing : Drain the water to about 5-250px on the resin layer, mix with 0.10-0.20MPa compressed air for about 2-5min , stop the gas and release water quickly to prevent the resin from being re-due to different gravity Layered.

    5 )正洗:用阴床进水以 20-30m/h 的流速进行正洗至出水合格为止。 ( 5 ) Positive washing: Use the water in the overcast bed to perform positive washing at a flow rate of 20-30m / h until the effluent is qualified.

    1-3% ,至排出液显碱性为止,浸泡 Tip: If the delamination of the large backwash is not obvious, the advanced lye concentration can be 1-3% , until the discharged liquid becomes alkaline, soak

    小时,带碱液反洗分层。 After 1-4 hours, the layers were backwashed with lye.

    Fourth, matters needing attention

    、石英砂垫层乱层 1. Random layer of quartz sand cushion
    When the quartz sand cushion layer is selected at the bottom of the exchanger, the quartz sand layer will agglomerate due to improper backwash operation or fouling; if the backwash water is flushed out locally, the quartz sand cushion layer will be disordered.
    The center of the dome-shaped perforated plate under the quartz sand cushion layer should not be open to avoid the high water flow velocity at the bottom to disturb the quartz sand layer. If the dome plate is all open, you can install a baffle under the dome plate. However, slot sprinklers or perforated flower baskets cannot be used because their water flow rate is too high and it is close to the dome plate. , Will still make the water flow concentrated in the local small holes and spray, disrupting the quartz sand layer.
    The quartz sand cushion layer should be laid in layers in strict accordance with the gradation, and the thickness of each layer must be uniform. 40-60m/h 时,石英砂垫层不乱层,不移动。 Before loading the resin, a backwash test can be performed. When the flow rate reaches 40-60m / h , the quartz sand cushion layer will not be disordered and will not move.

    、防腐涂层脱落问题 2 , the problem of anti-corrosion coating peeling off
    At present, rubber linings are widely used as anticorrosive coatings in ion exchangers, and their corrosion resistance is good. 10-15 年,不会脱落。 Under normal use conditions, the life can reach 10-15 years without falling off. However, water treatment equipment using epoxy coatings or FRP linings often suffers from coating shedding.
    After the coating is peeled off, the medium with strong acid and alkali will cause severe corrosion to the equipment (steel or concrete), and the corrosion products will also seriously pollute the resin and effluent water. A large piece of epoxy resin coating or glass fiber reinforced plastic that has fallen off may also cover the water distribution device, causing a biased flow of water flow and regeneration liquid, which prevents the exchanger from operating normally. When the coating is found to be off, the equipment should be overhauled in time, the off part of the coating should be polished, cleaned, and the anticorrosive coating should be reapplied.

    V. Resin pollution and treatment methods

  4. Suspended matter fouling

    The suspended matter in the raw water will block the pores of the resin layer, thereby increasing its resistance to water flow, and also covering the surface of the resin particles, thereby reducing its working exchange capacity. In order to prevent the suspended matter from being blocked, it is mainly to strengthen the pretreatment of the raw water to reduce the suspended matter content in the water. To remove suspended matter in the resin layer, methods such as increasing the number and time of back washing or scrubbing with compressed air can be used.

  5. Iron pollution

    The iron in cation resin mainly comes from iron ions in raw water, especially when iron salts are used as coagulant. Anion resin's iron is mainly derived from regeneration fluid. The stained resin becomes darker in color, reduces the exchange capacity, and accelerates the degradation of the anion resin. 10~15% )浸泡树脂 5~12 小时,甚至更长。 The method of removing iron compounds is usually to soak the resin with inhibitor-containing high-concentration hydrochloric acid ( 10-15% ) for 5-12 hours, or even longer. EDTA 等络合物进行处理。 It can also be treated with complexes such as citric acid, aminotriacetic acid, and EDTA .

    Judging the degree of resin iron pollution:

% Iron content %

Pollution

> 0.10

serious

0.01-0.10

medium

<0.01

Pollution-free

  1. Calcium sulfate precipitation

    When the calcium-type cation resin is regenerated with sulfuric acid, if it is not handled properly, it is possible to precipitate calcium sulfate in the resin layer. At this time, not only is cleaning difficult after regeneration, there is always hardness in the eluate, and the exchange capacity of the resin is reduced.

    Measures to prevent the precipitation of calcium sulfate, one is to reduce the concentration of sulfuric acid in the regeneration solution, and the other is to speed up the flow rate of the regeneration solution. A stepwise regeneration method can also be used, whose concentration gradually increases and the flow rate gradually decreases. 10% 的盐酸溶液浸泡沫 1-2 天,或改用盐酸再生数次。 Once the calcium sulfate is found, the foam can be immersed in 10% hydrochloric acid solution for 1-2 days, or regenerated with hydrochloric acid several times.

  2. Silicon pollution

Silicon compound pollution occurs in strong base anion exchangers, especially in equipment and systems where strong and weak anion resins are used in combination. As a result, the silicon removal efficiency of the anion exchanger is often reduced. This contamination occurs due to insufficient regeneration, or the resin was not regenerated in a timely manner after failure. Treatment method can be soaked and dissolved in dilute warm alkali solution. 2% ,温度约 40 The lye concentration is 2% and the temperature is about 40 . 4% 氢氧化钠溶液循环清洗。 When the pollution is serious, the heated 4% sodium hydroxide solution can be used for cycle cleaning.

  1. Oil pollution

    Oil pollution to resin is mainly absorbed on the resin skeleton or covered on the resin surface, which reduces the resin exchange capacity, and the water production capacity during the cycle is significantly reduced. At this time, the reason should be checked first to eliminate the fault and prevent oil from leaking in. 40 8-10/% 氢氧化钠溶液循环清洗,清洗中保持溶液浓度。 The contaminated resin can be cyclically cleaned with 8-10 /% sodium hydroxide solution at 40 , and the solution concentration is maintained during cleaning. 200 号溶剂汽油)或表面活性剂(如聚氯乙烯辛烷基苯醇)清洗。 It can also be cleaned with a suitable solvent (such as petroleum ether, No. 200 solvent gasoline) or a surfactant (such as polyvinyl octyl benzyl alcohol).

  2. Organic pollution

    1 )树脂颜色变深;( 2 )工作交换容量下降;( 3 )出水电导率增大;( 4 )出水 PH 值降低;( 5 )出水二氧化硅含量增大;( 6 )清洗水量增加。 Styrenic strong alkaline anion resin is susceptible to organic pollution, which is characterized by: ( 1 ) the resin color becomes darker; ( 2 ) the working exchange capacity decreases; ( 3 ) the effluent conductivity increases; ( 4 ) the effluent pH value decreases; ( 5 ) The content of effluent silica increases; ( 6 ) The amount of washing water increases.

    The basic measures to prevent organic pollution are to remove organics in water as much as possible during pretreatment, and use anti-pollution resins, such as macroporous weak alkali anion resin, and even acrylic anion resin.

    10%NaCl+4%NaOH 混合液,用量为 3 个树脂床体积,以缓慢的流速通过树脂层,当第 2 个床体积通入后,浸泡树脂 8 小时或放置过夜,再通入第 3 床体积混合液。 The commonly used recovery method is the alkaline salt method, which uses 10% NaCl + 4% NaOH mixed solution in an amount of 3 resin bed volumes and passes through the resin layer at a slow flow rate. After the second bed volume is passed in, the resin 8 Hour or overnight, and then pass in the third bed volume. 40-50 The mixture needs to be warmed to 40-50 . 1% 左右磷酸钠或硝酸钠,或结合压缩空气搅拌树脂层,则效果更佳。 Adding about 1% sodium phosphate or sodium nitrate to the mixed solution , or stirring the resin layer with compressed air, the effect is even better.

    When the alkaline salt method is not effective, you can consider washing with sodium hypochlorite solution. 10%NaCl 溶液通过树脂层,使树脂彻底失效。 At this time, in an anion single bed or mixed bed system, at least one bed volume of 10% NaCl solution is first passed through the resin layer, so that the resin is completely ineffective. The concentration of sodium hypochlorite solution is

    1% ,用量为 3 个树脂床体积。 The effective chlorine content is 1% , and the amount is 3 resin bed volumes. 2 个床体积溶液在树脂床内浸泡 4 小时,溶液不用加热。 The second bed volume solution was soaked in the resin bed for 4 hours without heating the solution. Finally, trace amounts of sodium hypochlorite must be rinsed (rinsed), including waste liquid in the sewer.

    Determine the degree of organic pollution:

     

Color

Pollution degree

Clear and transparent

No pollution

Light yellow

Light pollution

amber

Moderately polluted

brown

Severe pollution

Dark brown or black

Severe pollution

According to different situations, different resuscitation treatment methods can be adopted, and our company can provide technical guidance according to specific conditions.

Storage and transportation of ion exchange resins

、离子交换树脂在长期储存中,或需在停用设备内长期存放,强型树脂(强酸性和强碱性树脂)应转为盐型,弱型树脂(弱酸性和弱碱性树脂)可转为相应的氢型或游离胺型,也可转变为盐型,以保持树脂性能的稳定。 1. In long-term storage of ion exchange resins, or long-term storage in decommissioned equipment, strong resins (strongly acidic and strongly basic resins) should be converted to salt-type, weak resins (weakly acidic and weakly basic resins) It can be converted to the corresponding hydrogen type or free amine type, or it can be converted to the salt type to maintain the stability of the resin performance. Soak in clean water. If the decommissioned equipment must drain water, it should be sealed to prevent water loss from the resin.
、离子交换树脂内含有一定的平衡水份,在储存和运输中应保持湿润,防止脱水。 2. The ion exchange resin contains a certain amount of equilibrium moisture, which should be kept moist during storage and transportation to prevent dehydration. 5 -40 为宜。 The resin should be stored indoors or covered, and the ambient temperature is preferably 5 -40 . The bags of resin should be kept away from direct sunlight and away from heating devices such as boilers and heaters to avoid dehydration.
If it is found that the resin has been dehydrated, do not put the resin directly in water, otherwise the dry resin will swell sharply and break when encountering water. 10% 左右的食盐水慢慢加入到树脂中,浸泡数小时后用洁净水逐步稀释。 According to the degree of dehydration, about 10% of saline solution is slowly added to the resin, and it is gradually diluted with clean water after soaking for several hours.

、当环境温度在 0 或以下时,为防止树脂因内部水份结冰而崩裂,应做好保温措施,或根据气温条件,将树脂存于相应浓度的食盐水中,防止冰冻。 3. When the ambient temperature is 0 ° C or below, in order to prevent the resin from cracking due to internal water freezing, heat preservation measures should be taken, or the resin should be stored in salt water of corresponding concentration according to the temperature conditions to prevent freezing. If the resin is found to have been frozen, it should be allowed to thaw slowly and naturally, and it should not be applied to the resin with mechanical force.
  

The relationship between salt solution concentration and freezing point is as follows:

concentration

5%

10%

15%

20%

23.5%

freezing point

-3

-7

-10.8

-16.3

-21.2

4. Resin placed in the exchanger for a long time out of use. In order to prevent irreversible pollution of the resin by microorganisms (such as algae, bacteria, etc.), the resin must be thoroughly backwashed before removal to remove suspended matter accumulated during operation, and Pay attention to regular flushing and water changes. Or after thorough backwashing:
 
Anion resin : 10% NaCl + 2% NaOH mixed solution with 3 times the resin volume is passed through the resin layer twice, soaked for several hours each time, and then drained. If necessary, rinse the resin layer with 0.2% hydrogen peroxide (H 2 O 2 ) solution twice the resin volume before restarting.
 
Anion resin: 0.5% formaldehyde solution can be filled in the cation exchanger and the piping system, and this concentration is maintained during the shutdown period. Can also be soaked in saline. Rinse with 0.2% hydrogen peroxide or 0.5% formaldehyde solution before the device restarts.


0533-2183539

National Unified Customer Service Phone


Address: Room 1-905, Huijin Building, Lutai Avenue, Zhangdian District, Zibo City