阅读说明：本技术 一种反渗透膜钙镁硅铁垢清洗剂的制备方法 (A kind of preparation method of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent ) 是由 周爱珍 黄豹 李春腾 陆明 于 2019-09-04 设计创作，主要内容包括：本发明公开了一种反渗透膜钙镁硅铁垢清洗剂的制备方法,具体包括以下步骤：S1、原料的选取和称量,S2、初混液的混合制备,S3、反渗透膜钙镁硅铁垢清洗剂的配制,本发明涉及反渗透膜清洗技术领域。该反渗透膜钙镁硅铁垢清洗剂的制备方法,避免事态恶化,恢复原膜状况,延长了膜的使用寿命,降低了成本和人员费用,使压差降低,脱盐率升高,产水率增大.清洗效果明显,运行正常,很好的解决了在反渗透装置在长期运行后,会在膜上浓水侧积累胶体、金属氧化物、细菌、有机物、水垢等物质,造成膜污堵的问题,从而使膜通量提高,组件进出口压差降低,脱盐率上升,经过常规清洗效果明显,清洗频率减小,产水量大大提高。(The invention discloses a kind of preparation methods of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent, specifically includes the following steps: the selection and weighing of S1, raw material, S2, just mixed liquid are mixed with, and the preparation of S3, reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent, the present invention relates to reverse osmosis membrane cleaning technique fields.The preparation method of the reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent, the state of affairs is avoided to deteriorate, restore former membranaceous condition, extend the service life of film, it reduces costs and personal expenditures, reduce pressure difference, salt rejection rate increases, it is obvious that producing water ratio increases cleaning effect, normal operation, very good solution is in reverse osmosis unit after longtime running, colloid can be accumulated in concentrated water side on film, metal oxide, bacterium, organic matter, the substances such as scale, the problem for causing film dirt stifled, to make membrane flux improve, component inlet outlet pressure differential reduces, salt rejection rate rises, it is obvious by conventional cleaning effect, cleaning frequency reduces, water yield greatly improves.)

1. a kind of preparation method of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent, it is characterised in that: specifically includes the following steps:

The selection and weighing of S1, raw material: citric acid, oxalic acid, hydrogen of the desired weight than part are distinguished by weighing equipment first Fluoric acid, boric acid, hydrochloric acid and ACS aqueous solution, and saved by storing equipment, in case using；

S2, just mixed liquid are mixed with: and then the ACS aqueous solution for measuring step S1 is added in stirring container, opens stirring, then will The boric acid and hydrochloric acid that step S1 is measured are added sequentially in stirring container, at normal temperatures and pressures, mixing speed 70-80r/min, 8-12min is stirred, keeps boric acid and dissolving with hydrochloric acid bright；

The preparation of S3, reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent: the step S1 oxalic acid measured and citric acid are added sequentially to again Stirring and dissolving in stirring container in step S2, it is in uniform clear liquid that hydrofluoric acid mixing time 1-2h, which is then added, can be obtained To reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent.

2. a kind of preparation method of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent according to claim 1, it is characterised in that: anti- The raw material of permeable membrane calcium and magnesium ferrosilicon scale washing agent includes: 18-21 parts of citric acid, 8-12 parts of oxalic acid, hydrofluoric acid 6-7 by weight part Part, 2-3 parts of boric acid, 2-3 parts of hydrochloric acid and 57-61 parts of ACS aqueous solution.

3. a kind of preparation method of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent according to claim 2, it is characterised in that: institute It includes: 18 parts of citric acids, 12 parts of oxalic acid, 7 parts that the raw material of the formula A of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent, which is stated, by weight part Hydrofluoric acid, 3 parts of boric acid, 3 parts of hydrochloric acid and 57 parts of ACS aqueous solutions.

4. a kind of preparation method of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent according to claim 2, it is characterised in that: institute It includes: 20 parts of citric acids, 10 parts of oxalic acid, 5 parts that the raw material of the formula B of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent, which is stated, by weight part Hydrofluoric acid, 3 parts of boric acid, 2 parts of hydrochloric acid and 60 parts of ACS aqueous solutions.

5. a kind of preparation method of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent according to claim 2, it is characterised in that: institute It includes: 21 parts of citric acids, 8 parts of oxalic acid, 6 parts that the raw material of the formula C of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent, which is stated, by weight part Hydrofluoric acid, 2 parts of boric acid, 2 parts of hydrochloric acid and 61 parts of ACS aqueous solutions.

6. a kind of preparation method of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent according to claim 1, it is characterised in that: institute The concentration for stating ACS aqueous solution is 3%.

7. a kind of preparation method of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent according to claim 1, it is characterised in that: institute The reverse osmosis membrane cleaning agent application method of step S1 preparation is stated, specifically includes the following steps:

T1, first by the acidic cleaner prepared be heated to 30-35 DEG C it is stand-by；

T2, then by reverse osmosis acidic cleaner with 1:10 dilution proportion to reverse osmosis membrane carry out off line chemical cleaning.

8. a kind of preparation method of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent according to claim 7, it is characterised in that: institute When stating step T2 progress off line chemical cleaning, adjusting pH value with hydrochloric acid is 2.

Technical field

The present invention relates to reverse osmosis membrane cleaning technique field, specially a kind of system of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent Preparation Method.

Background technique

Reverse osmosis membrane dirt is stifled to show as serious high calcium, high magnesium and silica, the dirt of pipe network iron oxide deposits object Stifled and pollution has become the biggest obstacle that counter-infiltration system is run steadily in the long term, show that dirty stifled object is heavy for calcium and magnesium ferrosilicon dirt through analysis The dirt of product object is stifled, needs effectively practical cleaning technique to realize the operation steady in a long-term of counter-infiltration system.

The problem of designing or run with water supply source worsening and pretreatment system, reverse osmosis membrane utilizes chemical cleaning Method, with anthology reagent by deposit calcium carbonate, magnesium carbonate and ferrosilite, calcium silicates and iron oxide dirt, by chemical Acid and chelation etc., it is effective by reaction, the deposit on film is eliminated, the cleaning way of reverse osmosis membrane is divided at present Off line cleaning way and on-line cleaning mode, off line cleaning refer to and split out reverse osmosis membrane from system, to single branch membrane module into Row chemical cleaning, thoroughly, cleaning effect is good, but scavenging period is longer for the cleaning of this cleaning wayization, dirt removal it is thorough.

Conventional on-line cleaning mainly carries out anti-seepage membrane using the cleaning corollary apparatus connecting with system clear at present It washes, short for scavenging period the characteristics of on-line cleaning, easy to operate, expense is cleaned low compared with off line, but cleaning effect is cleaned compared with off line Want poor, the stifled Resolving probiems of dirt are not thorough, and therefore, there is an urgent need to develop a kind of excellent reverse osmosis membrane cleaning agent formulas, solve film Dirt block up problem, reduce pressure difference, salt rejection rate increase, producing water ratio increase cleaning effect it is obvious, normal operation.

The present invention is solved in reverse osmosis unit after longtime running, concentrated water side accumulation colloid, metal can be aoxidized on film The substances such as object, bacterium, organic matter, scale cause film dirt stifled, membrane flux are caused to reduce, and component inlet outlet pressure differential increases, salt rejection rate Decline, unobvious by conventional cleaning effect, cleaning frequency increases, the big heavy discount of water yield, the knot of simultaneous inorganic matter Dirt, the stifled ingredient of dirt is more complicated, and it is apparent and have that film weight at 20 kilograms or more, for this existing phenomenon has developed a kind of effect The cleaning agents of membrane of selectivity is to solve the problems, such as that the dirt of film is stifled.

Summary of the invention

(1) the technical issues of solving

In view of the deficiencies of the prior art, the present invention provides a kind of preparation sides of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent Method is solved in reverse osmosis unit after longtime running, can on film concentrated water side accumulation colloid, metal oxide, bacterium, organic The substances such as object, scale cause film dirt stifled, membrane flux are caused to reduce, and component inlet outlet pressure differential increases, salt rejection rate decline, by normal Advise the problem of cleaning effect is unobvious, and cleaning frequency increases, water yield big heavy discount.

(2) technical solution

In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of reverse osmosis membrane calcium and magnesium ferrosilicon dirt The preparation method of cleaning agent, specifically includes the following steps:

The selection and weighing of S1, raw material: citric acid of the desired weight than part, grass are distinguished by weighing equipment first Acid, hydrofluoric acid, boric acid, hydrochloric acid and ACS aqueous solution, and saved by storing equipment, in case using；

S2, just mixed liquid are mixed with: and then the ACS aqueous solution for measuring step S1 is added in stirring container, opens stirring, The step S1 boric acid measured and hydrochloric acid are added sequentially in stirring container again, at normal temperatures and pressures, mixing speed 70-80r/ Min stirs 8-12min, keeps boric acid and dissolving with hydrochloric acid bright；

The preparation of S3, reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent: the step S1 oxalic acid measured and citric acid are successively added again Enter the stirring and dissolving into the stirring container in step S2, it is in uniform clear liquid that hydrofluoric acid mixing time 1-2h, which is then added, i.e., Reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent can be obtained.

Preferably, the raw material of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent includes: 18-21 parts of citric acid, grass by weight part 8-12 parts sour, 6-7 parts of hydrofluoric acid, 2-3 parts of boric acid, 2-3 parts of hydrochloric acid and 57-61 parts of ACS aqueous solution.

Preferably, the raw material of the formula A of the reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent includes: 18 parts of lemons by weight part Lemon acid, 12 parts of oxalic acid, 7 parts of hydrofluoric acid, 3 parts of boric acid, 3 parts of hydrochloric acid and 57 parts of ACS aqueous solutions.

Preferably, the raw material of the formula B of the reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent includes: 20 parts of lemons by weight part Lemon acid, 10 parts of oxalic acid, 5 parts of hydrofluoric acid, 3 parts of boric acid, 2 parts of hydrochloric acid and 60 parts of ACS aqueous solutions.

Preferably, the raw material of the formula C of the reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent includes: 21 parts of lemons by weight part Lemon acid, 8 parts of oxalic acid, 6 parts of hydrofluoric acid, 2 parts of boric acid, 2 parts of hydrochloric acid and 61 parts of ACS aqueous solutions.

Preferably, the concentration of the ACS aqueous solution is 3%.

Preferably, the reverse osmosis membrane cleaning agent application method of the step S1 preparation, specifically includes the following steps:

T1, first by the acidic cleaner prepared be heated to 30-35 DEG C it is stand-by；

T2, then by reverse osmosis acidic cleaner with 1:10 dilution proportion to reverse osmosis membrane carry out off line chemical cleaning.

Preferably, when the step T2 carries out off line chemical cleaning, adjusting pH value with hydrochloric acid is 2.

(3) beneficial effect

The present invention provides a kind of preparation methods of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent.Have compared with prior art Below the utility model has the advantages that the preparation method of the reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent, specifically includes the following steps: S1, raw material It chooses and weighs: desired weight being distinguished than the citric acid of part, oxalic acid, hydrofluoric acid, boric acid, hydrochloric acid by weighing equipment first It with ACS aqueous solution, and is saved by storing equipment, in case using, S2, just mixed liquid are mixed with: and then by step S1 The ACS aqueous solution of measurement is added in stirring container, opens stirring, then the step S1 boric acid measured and hydrochloric acid are added sequentially to stir In container, at normal temperatures and pressures, mixing speed 70-80r/min stirs 8-12min, keeps boric acid and dissolving with hydrochloric acid bright, S3, The preparation of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent: the step S1 oxalic acid measured and citric acid are added sequentially in step S2 again Stirring container in stirring and dissolving, then be added hydrofluoric acid mixing time 1-2h be in uniform clear liquid, can be obtained reverse osmosis Film calcium and magnesium ferrosilicon scale washing agent, by having developed, a kind of effect is apparent and selective cleaning agents of membrane is to solve film The stifled problem of dirt, stifled in the dirt that can effectively remove inorganic matter, cleaning effect is good, and thoroughly, the method for on-line cleaning is not for cleaning The operation pressure of reverse osmosis membrane can be reduced, therefore is then needed clear by off line in the water yield of short time fast quick-recovery counter-infiltration system The mode washed goes to alleviate reverse osmosis pressure, the state of affairs is avoided to deteriorate, and restores former membranaceous condition, extends the service life of film, reduces Cost and personal expenditures, reduce pressure difference, and salt rejection rate increases, and it is obvious that producing water ratio increases cleaning effect, normal operation, very well Solve in reverse osmosis unit after longtime running, can on film concentrated water side accumulation colloid, metal oxide, bacterium, organic The substances such as object, scale, the problem for causing film dirt stifled, so that membrane flux be made to improve, component inlet outlet pressure differential is reduced, in salt rejection rate It rises, obvious by conventional cleaning effect, cleaning frequency reduces, and water yield greatly improves.

Detailed description of the invention

Fig. 1 is flow chart of the invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Referring to Fig. 1, the embodiment of the present invention provides three kinds of technical solutions: a kind of reverse osmosis membrane calcium and magnesium ferrosilicon scale washing agent Preparation method specifically includes following embodiment: