CN111905445A - Method for separating mixed lipid of anion resin and cation resin - Google Patents
Method for separating mixed lipid of anion resin and cation resin Download PDFInfo
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- CN111905445A CN111905445A CN202010849268.8A CN202010849268A CN111905445A CN 111905445 A CN111905445 A CN 111905445A CN 202010849268 A CN202010849268 A CN 202010849268A CN 111905445 A CN111905445 A CN 111905445A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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Abstract
The invention discloses a method for separating mixed lipid of anion resin and cation resin, which comprises the following steps: s1, introducing the mixed resin into a cation-anion resin separation tank, and introducing an industrial sodium chloride solution into the cation-anion resin separation tank for soaking for layering; s2, after layering is finished, opening a positive resin discharge valve arranged at the bottom of the positive and negative resin separation tank, conveying the positive resin to a positive resin filter tank through a pipeline, and separating salt solution from the positive resin in the positive resin filter tank; s3, conveying the cation resin to a cation bed; and S4, when the male resin in the male and female resin separation tank is conveyed, closing the male resin discharge valve, introducing power water into the male and female resin separation tank, floating the female resin to the female resin discharge port, opening the female resin discharge valve on the male and female resin separation tank, and conveying the female resin to the female bed through a pipeline. The invention solves the problems of low separation rate and low reduction amplitude of the conductivity and the pH value caused by the existing separation by adopting compressed air.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a method for separating mixed lipid of anion resin and cation resin.
Background
In the secondary desalting process of the cation bed, the carbon remover, the intermediate pump and the anion bed, in the daily production process, after a filter cap or a partition plate at the bottom of the cation bed fails, cation resin enters the anion bed, so that cation resin and anion resin are mixed, and after the mixture, the cation resin and sodium ions in alkali are adsorbed and reacted in the regeneration process of the anion bed, so that the conductivity of effluent of the anion bed is increased, and the pH value is increased.
The existing treatment method for mixed lipid of cation and anion resin is waste or adopts compressed air separation, and the waste can cause a great deal of resource waste. The separation rate of the separation by adopting the compressed air is 80-85%, the reduction amplitude of the conductivity and the pH value is not large, and the resin has no resuscitation effect, namely the effect of separating mixed grease of the cation resin and the anion resin by adopting the compressed air is not ideal.
Disclosure of Invention
The invention aims to provide a method for separating mixed resin of cation and anion, which can realize the separation of cation resin and anion resin and has the advantage of high separation degree.
The invention is realized by the following technical scheme:
a method for separating mixed lipid of anion resin and cation resin comprises the following steps:
s1, introducing the mixed resin into a cation-anion resin separation tank, introducing an industrial sodium chloride solution into the cation-anion resin separation tank, and soaking for layering, wherein the concentration of the industrial sodium chloride solution is more than 16% and less than or equal to 18%;
s2, after layering is finished, opening a positive resin discharge valve arranged at the bottom of the positive and negative resin separation tank, conveying the positive resin to a positive resin filter tank through a pipeline, and separating salt solution from the positive resin in the positive resin filter tank;
s3, after the salt solution is completely separated from the cation resin, conveying the cation resin to an cation bed;
and S4, when the male resin in the male and female resin separation tank is conveyed, closing the male resin discharge valve, introducing power water into the male and female resin separation tank, floating the female resin to the female resin discharge port, opening the female resin discharge valve on the male and female resin separation tank, and conveying the female resin to the female bed through a pipeline.
The inventive concept of the present application resides in:
introducing mixed resin and high-salt sodium chloride solution into the cation-anion resin separation tank, soaking the mixed resin in the high-salt sodium chloride solution to separate the anion resin and the cation resin into layers, directly introducing the layered anion resin into the anion bed, introducing the cation resin into the cation resin filter box to perform filtration separation of the cation resin and the salt solution, and introducing the cation resin retained by the cation resin separation plate into the cation bed
In the separation process of the system, the main factor is the concentration of the sodium chloride in the high-concentration salt solution, the concentration of the sodium chloride solution in the whole separation process is controlled to be 16% -18%, wherein the density of the 16% concentrated salt solution is 1.109 g/cm3And the density of 18 percent concentrated brine is 1.132 g/cm3While the density of the common cation resin is 1.24-1.29 g/cm3The density of the negative resin is 1.06-1.11 g/cm3The density of the cation resin, the anion resin and the salt solution is in the following relation: cation resin>Salt solution>The negative resin, for which the positive resin is at the bottom layer and the negative resin is at the top layer in the separating tank, has separating conditions, and the density of the negative resin in water must be more than 16 percent.
The separation method can directly carry out the layered separation of the cation resin and the anion resin through the high-salt solution, provide necessary conditions for the separation of the cation resin and the anion resin by reasonably designing the concentration of the sodium chloride solution and adopting the high-concentration salt solution sodium chloride (16% -18%), simultaneously improve the layered effect by controlling the volume ratio and the soaking time of the industrial sodium chloride solution and the mixed resin, and then carry out the filtration separation of the cation resin and the salt solution to realize the separation of the anion resin and the cation resin.
The process has the advantages that:
1) the anion resin and the cation resin can be directly and effectively separated, and the annual cost of the anion resin is saved by about 96 ten thousand yuan;
2) because the resin is soaked in high-concentration salt, the poisoning degree of the anion resin can be reduced, the positive washing water of the anion resin is reduced, and the consumption of the anion bed is reduced every yearThe water amount is 25m315 × 365d ═ 13.68 ten thousand tons;
3) the water consumption of the positive washing of the negative bed is qualified effluent of the positive bed, so that the preparation amount of the positive bed can be reduced by 13.68 ten thousand meters per year3The electric energy for producing water is saved by 3.2 ten thousand degrees, and 23.2 tons of hydrochloric acid are saved;
4) and because the preparation amount of the cation bed is reduced, the acid-base wastewater discharge amount in the preparation process can be directly released, and the environment protection and the development of circular economy are facilitated.
The separation method adopts the high-salt sodium chloride solution to soak the mixed resin to realize separation, compared with compressed air separation, the separation degree is high and is more than 98 percent, the separation degree of the compressed air separation is 80-85 percent, the poisoning degree can be reduced by adopting the high-salt sodium chloride solution to soak the mixed resin, the compressed air separation has no effect, the conductivity and the pH value of the water quality after the implementation of the process are in qualified ranges, and the conductivity and the pH value of the water quality after the implementation of the compressed air separation are not greatly reduced.
In conclusion, the separation method of the invention not only can realize the separation of the cation resin and the anion resin, but also can solve the problems of low separation rate and small reduction amplitude of the conductivity and the pH value caused by the existing separation by adopting compressed air.
Further, in the step S1, the volume ratio of the industrial sodium chloride solution to the mixed resin is 1.3-1.5, and the soaking time is more than or equal to 24 hours.
Further, the concentration of the industrial sodium chloride solution is 18%, and the soaking time is 24 h.
Further, hydrochloric acid and alkali are respectively adopted in the anion bed and the cation bed to regenerate the anion resin and the cation resin.
Further, the bottom of negative and positive resin knockout drum is provided with positive resin bleeder valve, the lateral wall of negative and positive resin knockout drum is provided with two negative resin bleeder valves, is bleeder valve and negative resin lower bleeder valve on the negative resin respectively, the bleeder valve sets up 2 negative resin discharge gates that are setting up from top to bottom under the negative resin promptly.
The positive and negative resin knockout drum sets up 2 negative resin bleeder valves and is the observation resin separation condition, generally when the positive resin in bottom or the poisoning resin layer of degree of depth is many and to the baiting valve in, open the bleeder valve can, then need not open lower bleeder valve again, avoids bottom positive resin or the poisoning resin of degree of depth to get into the negative bed jar body once more like this and causes secondary pollution.
Furthermore, a power water inlet is arranged on the anion and cation resin separating tank.
The power water (clear water) is convenient to be introduced into the cation-anion resin separation tank from an independent inlet.
The power water is obtained by pressurizing normal pressure filtered water, namely clean water, by a water pump, and making the filtered water obtain water pressure, namely impulsive force.
Furthermore, a positive resin separation plate is arranged in the positive resin filter box, a feeding port is formed in the side wall of the positive resin filter box above the positive resin separation plate and is connected with a positive resin discharge valve through a pipeline, a filtering separation box positive resin discharge valve and a filtering separation box salt solution control valve are respectively arranged on the side wall of the positive resin filter box above and below the positive resin separation plate, and the filtering separation box positive resin discharge valve is communicated with the cation bed through a pipeline.
Further, the salt liquid control valve of the filtering and separating box is communicated with the anion-cation resin separating tank through a pipeline, and a circulating booster pump is arranged on the pipeline.
The arrangement is favorable for circulating the salt solution to the anion-cation resin separation tank, and further layering is realized.
Further, the male resin separation plate is disposed obliquely.
The positive resin adopts the inclined arrangement mode, is mainly convenient for the resin because of the effect of gravity, deposits at the minimum on inclined plane, helps the quick and complete clearance of positive resin.
Furthermore, the aperture of the filter screen holes on the positive resin separation plate is 0.3-0.5 mm.
The effective resin particle size of the strong acid polystyrene cation exchange resin and the strong base polystyrene anion exchange resin of the current 001 x 1 and 201 x 7 is larger than 0.5mm, and in the design process of the filter box, the separation of the filter box adopts a polyethylene filter screen of 0.3-0.5mm for separation.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the separation method can directly carry out the layered separation of the cation resin and the anion resin through the high-salt solution, provide necessary conditions for the separation of the cation resin and the anion resin by reasonably designing the concentration of the sodium chloride solution and adopting the high-concentration salt solution sodium chloride (16% -18%), simultaneously improve the layered effect by controlling the volume ratio and the soaking time of the industrial sodium chloride solution and the mixed resin, and then carry out the filtration separation of the cation resin and the salt solution to realize the separation of the anion resin and the cation resin.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a layered processing system.
Reference numbers and corresponding part names in the drawings:
1-cation bed, 2-anion bed, 3-cation resin separation tank, 4-transparent observation mirror, 5-feed valve, 6-anion resin upper discharge valve, 7-anion resin lower discharge valve, 8-cation resin discharge valve, 9-cation resin filter tank, 10-circulating booster pump, 11-filtration separation tank cation resin discharge valve, 12-filtration separation tank salt solution control valve, 13-cation resin separation plate and 14-power water inlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
a method for separating mixed lipid of anion resin and cation resin comprises the following steps:
s1, introducing the mixed resin into a cation-anion resin separation tank 3 through a feed valve 5, introducing an industrial sodium chloride solution into the cation-anion resin separation tank 3, and soaking, wherein the concentration of the industrial sodium chloride solution is 18% (mass concentration), the volume ratio of the industrial sodium chloride solution to the mixed resin is 1.3-1.5, the soaking time is 24 hours, and the soaking temperature is 25-30 ℃;
s2, after layering is finished, opening a positive resin discharge valve 8 arranged at the bottom of a positive and negative resin separation tank 3, conveying positive resin to a positive resin filter tank 9 through a pipeline, separating salt liquid from the positive resin in the positive resin filter tank 9, and arranging a positive resin separation plate 13 in the positive resin filter tank 9;
s3, opening a salt solution control valve 12 on the filtering and separating tank 9 to discharge salt solution, then opening a filtering and separating tank cation resin discharge valve 11 on the filtering and separating tank 9, and conveying cation resin to the cation bed 1 through a pipeline connected with the cation resin discharge valve 11;
s4, when the delivery of the male resin in the male and female resin separation tank 3 is finished, closing the male resin discharge valve 8, introducing power water into the male and female resin separation tank 3, enabling the female resin to float to the female resin discharge port, opening the female resin discharge valve on the male and female resin separation tank 3, and delivering the female resin to the female bed 2 through a pipeline; then, hydrochloric acid and separated alkali are respectively adopted in the anion bed 2 and the cation bed 1 for regeneration.
A layered treatment system adopted in the separation method in the embodiment is shown in fig. 1, and comprises an anode bed 1, an cathode bed 2, an anode-cathode resin separation tank 3 and an anode resin filter tank 9, wherein the anode bed 1 and the cathode bed 2 are both tank structures;
a feed inlet and a female resin discharge outlet are formed in the side wall of the male and female resin separation tank 3, a feed valve 5 and a female resin discharge valve are respectively arranged on the feed inlet and the female resin discharge outlet, the female resin discharge valve is communicated with the female bed 2 through a pipeline, the bottom of the male and female resin separation tank 3 is communicated with a male resin filter box 9 through a pipeline, and a male resin discharge valve 8 is arranged on a pipeline between the male and female resin separation tank 3 and the male resin filter box 9;
a positive resin separation plate 13 is arranged in the positive resin filter box 9, the aperture of filter mesh holes on the positive resin separation plate 13 is smaller than the particle size of positive resin, the aperture of filter mesh holes on the positive resin separation plate 13 is 0.35mm, the particle size of positive resin is 0.55mm, a feed port, a filtered positive resin discharge port and a salt solution discharge port are arranged on the positive resin filter box 9, the feed port is communicated with the positive resin separation tank 3 through a pipeline, the filtered positive resin discharge port and the salt solution discharge port are respectively arranged above and below the positive resin separation plate 13, a filtered positive resin discharge valve 11 and a filtered separation box salt solution control valve 12 are respectively arranged on the filtered positive resin discharge port and the salt solution discharge port, and the filtered separation box positive resin discharge valve 11 is communicated with the positive bed 1 through a pipeline; be provided with transparent sight glass 4 on the lateral wall of negative and positive resin knockout drum 3, transparent sight glass 4 is used for observing the layering condition of negative resin and positive resin in the negative and positive resin knockout drum 3, filtration separator box salt solution control valve 12 passes through pipeline and negative and positive resin knockout drum 3 intercommunication, is provided with circulation booster pump 10 on this pipeline, be provided with power water entry 14 on the negative and positive resin knockout drum 3.
The separation process mainly comprises soaking, layering, separation, circulation and recovery of concentrated salt, wherein in the implementation process, the mixed resin of the cation resin and the anion resin is introduced into a cation-anion resin separation tank-3 through a feed valve-5, then the high-concentration salt solution sodium chloride with the concentration of 18% is input into the cation-anion resin separation tank-3, soaking is effectively carried out for 24 hours, and the condition of resin layering observation is carried out through a transparent observation mirror-4.
The system process can directly carry out layered separation on anion and cation resin through high salt solution, achieves the purpose of ensuring the water quality of anion resin effluent through lower cost investment, has high implementation, economy and reliability, and the ratio of the original treatment process and the new process of mixed fat layering is shown in the following table 1:
TABLE 1
Example 2:
as shown in fig. 1, this embodiment is based on embodiment 1, the female resin discharge valve is provided with two, respectively, a female resin upper discharge valve 6 and a female resin lower discharge valve 7, the female resin upper discharge valve 6 is provided above the female resin lower discharge valve 7, and the feed valve 5 is provided above the female resin upper discharge valve 6.
Example 3:
as shown in fig. 1, this embodiment is based on embodiment 1, and the male resin separation plate 13 is disposed obliquely.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for separating mixed lipid of anion resin and cation resin is characterized by comprising the following steps:
s1, introducing the mixed resin into a cation-anion resin separation tank (3), and introducing an industrial sodium chloride solution into the cation-anion resin separation tank (3) for soaking for layering, wherein the concentration of the industrial sodium chloride solution is more than 16% and less than or equal to 18%;
s2, after layering is finished, opening a positive resin discharge valve (8) arranged at the bottom of the positive and negative resin separation tank (3), conveying the positive resin to a positive resin filter tank (9) through a pipeline, and separating salt liquid from the positive resin in the positive resin filter tank (9);
s3, after the salt solution is completely separated from the cation resin, conveying the cation resin to the cation bed (1);
and S4, when the delivery of the cation resin in the cation-anion resin separation tank (3) is finished, closing the cation resin discharge valve (8), introducing power water into the cation-anion resin separation tank (3), enabling the anion resin to float to the anion resin discharge hole, opening the anion resin discharge valve on the cation-anion resin separation tank (3), and delivering the anion resin to the anion bed (2) through a pipeline.
2. The method for separating mixed lipid of anion and cation resins of claim 1, wherein the volume ratio of the industrial sodium chloride solution to the mixed resin in step S1 is 1.3-1.5, and the soaking time is not less than 24 h.
3. The method for separating lipid mixture of anion and cation resins as claimed in claim 2, wherein the concentration of the industrial sodium chloride solution is 18%, and the soaking time is 24 h.
4. The method for separating mixed lipid of anion and cation resins according to claim 1, wherein the regeneration of anion resin and cation resin is performed in the anion bed (2) and the cation bed (1) by using hydrochloric acid and alkali.
5. The method for separating mixed lipid of anion and cation resins according to claim 1, wherein the bottom of the anion and cation resin separation tank (3) is provided with an anion resin discharge valve (8), the side wall of the anion and cation resin separation tank (3) is provided with two anion resin discharge valves, namely an anion resin upper discharge valve (6) and an anion resin lower discharge valve (7), and the anion resin upper discharge valve (6) is arranged above the anion resin lower discharge valve (7).
6. The method for separating mixed lipid of anion and cation resins according to claim 1, wherein the anion and cation resin separation tank (3) is provided with a dynamic water inlet (14).
7. The method for separating mixed resin of cathode and anode according to claim 1, wherein a cathode resin separation plate (13) is arranged in the cathode resin filter tank (9), a feed port is arranged on the side wall of the cathode resin filter tank (9) above the cathode resin separation plate (13), the feed port is connected with the cathode resin discharge valve (8) through a pipeline, a filtering separation tank cathode resin discharge valve (11) and a filtering separation tank salt solution control valve (12) are respectively arranged on the side wall of the cathode resin filter tank (9) above and below the cathode resin separation plate (13), and the filtering separation tank cathode resin discharge valve (11) is communicated with the anode bed (1) through a pipeline.
8. The method for separating mixed lipid of anion and cation resins of claim 7, wherein the salt liquid control valve (12) of the filtering and separating tank is connected with the anion and cation resin separating tank (3) through a pipeline, and the pipeline is provided with a circulating booster pump (10).
9. The method for separating mixed fat of male and female resins according to claim 7, wherein the male resin separation plate (13) is disposed obliquely.
10. The method for separating mixed lipid of male and female resins according to claim 7, wherein the pore size of the filter mesh on the male resin separation plate (13) is 0.3-0.5 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010849268.8A CN111905445A (en) | 2020-08-21 | 2020-08-21 | Method for separating mixed lipid of anion resin and cation resin |
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| CN202010849268.8A CN111905445A (en) | 2020-08-21 | 2020-08-21 | Method for separating mixed lipid of anion resin and cation resin |
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Cited By (1)
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Application publication date: 20201110 |