CN212050903U - Utilize device of bipolar membrane electrodialysis equipment electrolytic treatment mirabilite - Google Patents
Utilize device of bipolar membrane electrodialysis equipment electrolytic treatment mirabilite Download PDFInfo
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- CN212050903U CN212050903U CN201922343544.9U CN201922343544U CN212050903U CN 212050903 U CN212050903 U CN 212050903U CN 201922343544 U CN201922343544 U CN 201922343544U CN 212050903 U CN212050903 U CN 212050903U
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Abstract
The utility model belongs to the technical field of solid waste treatment process, specificly relate to an utilize device of bipolar membrane electrodialysis equipment electrolytic treatment mirabilite. The device of the utility model comprises a dissolving tank, a sedimentation tank, a first delivery pump, a second delivery pump, a third delivery pump, an ion exchange resin device and bipolar membrane electrodialysis equipment. The device of the utility model is simple and convenient to produce and operate. Simultaneously because sulphuric acid and sodium hydroxide are the essential raw materials in viscose fiber enterprise in production, consequently the utility model discloses can recycle sulfate radical and sodium ion, not only can reduce the manufacturing cost of enterprise, can also alleviate the environmental protection pressure of solid useless processing and the sales pressure of anhydrous sodium sulphate. Solves the technical problem that the prior art lacks a method for effectively treating mirabilite.
Description
Technical Field
The utility model belongs to the technical field of solid waste treatment process, specificly relate to an utilize device of bipolar membrane electrodialysis equipment electrolytic treatment mirabilite.
Background
Natrii sulfas is sulfate mineral Natrii sulfas, and mainly contains hydrous sodium sulfate (Na)2SO4·10H2O). The bipolar membrane electrodialysis device comprises a first polar chamber, an acid chamber, a salt chamber, an alkali chamber and a second polar chamber which are sequentially connected in series. The first polar chamber and the acid chamber are connected in series through a bipolar membrane, the acid chamber and the salt chamber are connected in series through an anode membrane, the salt chamber and the alkali chamber are connected in series through a cathode membrane, and the alkali chamber and the second polar chamber are connected in series through a bipolar membrane.
The existing method for treating mirabilite is to remove crystal water of mirabilite and then change the crystal water into anhydrous sodium sulphate for sale. Due to the influence of the reduction of market demand, a large amount of anhydrous sodium sulphate is stacked in a viscose factory and cannot be treated. Bringing great pressure to environmental protection and sale. And therefore lack a device that can effectively treat salt cake.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve prior art among the above-mentioned background art and lack a method technical problem that can carry out effective treatment to the glauber's salt, provide a device that utilizes bipolar membrane electrodialysis equipment electrolytic treatment glauber's salt.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides an utilize bipolar membrane electrodialysis equipment electrolytic treatment mirabilite's device, includes dissolving tank, sedimentation tank, first delivery pump, sewage pipes, second delivery pump, third delivery pump, ion exchange resin device and bipolar membrane electrodialysis equipment, wherein:
the outlet of the dissolving tank is communicated with the inlet of the sedimentation tank through a pipeline and is arranged above the sedimentation tank;
an outlet of the sedimentation tank is communicated with an input end of the first conveying pump through a pipeline, and an output end of the first conveying pump is communicated with an inlet of the ion exchange resin device through a pipeline;
the outlet of the ion exchange resin device is communicated with the input end of the second delivery pump through a pipeline;
the bipolar membrane electrodialysis device comprises a first polar chamber, an acid chamber, a salt chamber, an alkali chamber and a second polar chamber;
the output end of the second delivery pump is communicated with the inlet of the salt chamber through a pipeline;
the outlet of the salt chamber is communicated with the input end of the third delivery pump through a pipeline, and the output end of the third delivery pump is communicated with the sewage discharge pipeline.
The utility model has the advantages that: mixing solid mirabilite with soft water in a dissolving tank to form mirabilite solution, and then settling impurities such as silt in the solution by standing in a settling tank. Then calcium, magnesium and zinc plasma in the water is intercepted by feeding the water into an ion exchange resin device. Interference is avoided for the treatment of mirabilite. And then feeding the filtrate into a salt chamber in the bipolar membrane electrodialysis equipment, and adding water with the same volume as the filtrate into an acid chamber and an alkali chamber of the bipolar membrane electrodialysis equipment respectively to start electrolysis of the bipolar membrane electrodialysis equipment. Water is decomposed on two bipolar membranes, hydroxide radicals enter an alkali chamber, hydrogen ions enter an acid chamber, sodium ions in a salt chamber enter the alkali chamber through a cationic membrane under the action of a direct current power supply, and sodium hydroxide is formed in the alkali chamber; the sulfate ions pass through the anion membrane into the acid chamber where sulfuric acid is formed. Thereby decomposing the sodium sulfate in the filtrate in the salt chamber, realizing the environment-friendly treatment of the mirabilite and not introducing other harmful substances. The device of the utility model is simple and convenient to produce and operate. Simultaneously because sulphuric acid and sodium hydroxide are the essential raw materials in viscose fiber enterprise in production, consequently the utility model discloses can recycle sulfate radical and sodium ion, not only can reduce the manufacturing cost of enterprise, can also alleviate the environmental protection pressure of solid useless processing and the sales pressure of anhydrous sodium sulphate. Solves the technical problem that the prior art lacks a method for effectively treating mirabilite. Better start-stop function between each workshop section can be realized to the setting of gate valve. The bipolar membrane electrodialysis device can adopt CJBMED-2040 type bipolar membrane electrodialysis device produced by Sophiaceae high polymer material science and technology limited. And gate valves are arranged on a pipeline between the dissolving tank and the sedimentation tank, a pipeline between the second delivery pump and the bipolar membrane electrodialysis equipment, and a pipeline between the bipolar membrane electrodialysis equipment and the third delivery pump.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the ion exchange resin device consists of a first ion exchange resin and a second ion exchange resin which are connected in parallel, and the output end of the first conveying pump is respectively communicated with the inlet of the first ion exchange resin and the inlet of the second ion exchange resin through pipelines; the outlet of the first ion exchange resin and the outlet of the second ion exchange resin are both communicated with the inlet of the salt chamber through pipelines.
The further scheme has the beneficial effects that when the first ion exchange resin works, the second ion exchange resin can be overhauled, and the ion exchange membrane of the second ion exchange resin is washed by inorganic acid or alkali with proper concentration, so that the second ion exchange resin is restored to the original initial state. Through the bottom crossing work and the maintenance of the first ion exchange resin and the second ion exchange resin, the continuity and the filtering effect of the device in use are ensured.
The bipolar membrane electrodialysis device further comprises an acid liquid storage tank and an alkali liquid storage tank, wherein the acid liquid storage tank and the alkali liquid storage tank are both arranged below the bipolar membrane electrodialysis device, an outlet of the acid chamber is communicated with an inlet of the acid liquid storage tank through a pipeline, and an outlet of the alkali chamber is communicated with an inlet of the alkali liquid storage tank through a pipeline; the outlet of the acid liquid storage tank and the outlet of the alkali liquid storage tank are respectively communicated with one end of each of the two concentration pipelines.
The further scheme has the beneficial effects that as hydroxyl enters the alkali chamber and hydrogen ions enter the acid chamber during electrolysis, sodium ions in the salt chamber enter the alkali chamber through the cationic membrane under the action of the direct current power supply to form sodium hydroxide in the alkali chamber; the sulfate ions pass through the anion membrane into the acid chamber where sulfuric acid is formed. Therefore, the sulfuric acid can be collected in the acid liquid storage tank by opening the outlets of the acid chamber and the alkali chamber, and the sodium hydroxide can be collected in the alkali liquid storage tank. Realizes recycling. And the concentrated sulfuric acid and sodium hydroxide which are introduced into a flash tank for flash evaporation and concentration to required concentration can be used as concentrated sulfuric acid and caustic soda or sold. And gate valves are arranged on the pipeline between the bipolar membrane electrodialysis equipment and the acid liquor storage tank, the pipeline between the bipolar membrane electrodialysis equipment and the alkali liquor storage tank and two concentration pipelines.
Further, still include drying tower, hydrogen storage tank and oxygen storage tank, wherein:
the drying tower comprises a first drying tower and a second drying tower which are arranged in parallel;
the inlet of the first drying tower is communicated with the top end of the first polar chamber through a pipeline, and the outlet of the first drying tower is communicated with the inlet of the hydrogen storage tank through a pipeline;
the inlet of the second drying tower is communicated with the top end of the second polar chamber through a pipeline, and the outlet of the second drying tower is communicated with the inlet of the oxygen storage tank through a pipeline.
The beneficial effect of adopting the above further scheme is that because the first polar chamber in the bipolar membrane electrodialysis device generates hydrogen and the second polar chamber generates oxygen in the electrolysis process, the hydrogen and the oxygen respectively enter the first drying tower and the second drying tower through two pipelines communicated with the top wall in the ascending process, and the water vapor attached to the gas is dried. The dried hydrogen and oxygen are respectively collected into the hydrogen storage tank and the oxygen storage tank, so that the recovery and the utilization of resources are realized.
Furthermore, the dissolving tank and the salt chamber are both internally provided with conductivity meters, and the acid chamber and the alkali chamber are both internally provided with pH meters.
The beneficial effect of adopting the further scheme is that the concentration of sodium sulfate in the mirabilite solution in the dissolving tank and the concentration of sodium sulfate in the salt chamber of the bipolar membrane electrodialysis device can be known through the conductivity. The pH meter can know the pH value of the acid liquor, so that whether the acid liquor is collected into the acid liquor storage tank or not can be determined.
Further, a fourth delivery pump is included, wherein:
the input end of the fourth delivery pump is communicated with the outlet of the salt chamber through a pipeline, and the output end of the fourth delivery pump is communicated with the inlet of the dissolving tank through a pipeline.
The method has the advantages that the electrolyzed filtrate containing the sodium sulfate with the lower concentration can be returned to the dissolving tank through the fourth delivery pump to be used as a mirabilite solvent, and the mirabilite solvent is mixed with the fixed mirabilite to form the mirabilite solution. The inlet of the fourth delivery pump communicated with the dissolving tank is a first inlet of the dissolving tank, and the inlet of the dissolving tank for adding raw materials is a second inlet.
Drawings
FIG. 1 is a schematic structural diagram of the device of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a dissolving tank, 2, a sedimentation tank, 3, a first delivery pump, 4, an ion exchange resin device, 401, first ion exchange resin, 402, second ion exchange resin, 5, a bipolar membrane electrodialysis device, 501, a first polar chamber, 502, an acid chamber, 503, a salt chamber, 504, an alkali chamber, 505, a second polar chamber, 601, an acid storage tank, 602, an alkali storage tank, 7, a drying tower, 701, a first drying tower, 702, a second drying tower, 801, a hydrogen storage tank, 802, an oxygen storage tank, 9, a sewage discharge pipeline, 10, a second delivery pump, 11, a third delivery pump, 12, a fourth delivery pump, 13 and a concentration pipeline.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Examples 1,
As shown in fig. 1, an apparatus for electrolytically treating mirabilite using a bipolar membrane electrodialysis device, comprising a dissolving tank 1, a settling tank 2, a first transfer pump 3, a sewage discharge pipe 9, a second transfer pump 10, a third transfer pump 11, an ion exchange resin device 4, and a bipolar membrane electrodialysis device 5, the bipolar membrane electrodialysis device 5 comprising a first compartment 501, an acid compartment 502, a salt compartment 503, an alkali compartment 504, and a second compartment 504, wherein an outlet of the dissolving tank 1 communicates with an inlet of the settling tank 2 through a pipe and is disposed above the settling tank 2; an outlet of the sedimentation tank 2 is communicated with an input end of the first conveying pump 3 through a pipeline, and an output end of the first conveying pump 3 is communicated with an inlet of the ion exchange resin device 4 through a pipeline; the outlet of the ion exchange resin device 4 is communicated with the input end of the second delivery pump 10 through a pipeline; the output end of the second delivery pump 10 is communicated with the inlet of the salt chamber 503 through a pipeline; the outlet of the salt chamber 503 is communicated with the input end of the third delivery pump 11 through a pipeline, and the output end of the third delivery pump 11 is communicated with the sewage discharge pipeline 9.
Optionally, the ion exchange resin device 4 is composed of a first ion exchange resin 401 and a second ion exchange resin 402 which are connected in parallel, and the output end of the first delivery pump 3 is respectively communicated with the inlet of the first ion exchange resin 401 and the inlet of the second ion exchange resin 402 through pipelines; the outlet of the first ion exchange resin 401 and the outlet of the second ion exchange resin 402 are both communicated with the inlet of the salt chamber 503 through a pipeline.
Optionally, the system further comprises an acid storage tank 601 and an alkali storage tank 602, wherein: an acid liquid storage tank 601 and an alkali liquid storage tank 602 are both arranged below the bipolar membrane electrodialysis device 5, an outlet of the acid chamber 502 is communicated with an inlet of the acid liquid storage tank 601 through a pipeline, and an outlet of the alkali chamber 502 is communicated with an inlet of the alkali liquid storage tank 602 through a pipeline; the outlet of the acid liquid storage tank 601 and the outlet of the alkali liquid storage tank 602 are respectively communicated with one end of two concentration pipelines 13. Gate valves are arranged on a pipeline between the bipolar membrane electrodialysis device 5 and the acid liquid storage tank 601, a pipeline between the bipolar membrane electrodialysis device 5 and the alkali liquid storage tank 602, and two concentration pipelines 13.
Optionally, the drying device further comprises a drying tower 7, a hydrogen storage tank 801 and an oxygen storage tank 802, wherein the drying tower 7 comprises a first drying tower 701 and a second drying tower 702 which are arranged in parallel; an inlet of the first drying tower 701 is communicated with the top end of the first polar chamber 501 through a pipeline, and an outlet of the first drying tower 701 is communicated with an inlet of the hydrogen storage tank 801 through a pipeline; the inlet of the second drying tower 702 is communicated with the top end of the second polar chamber 505 through a pipeline, and the outlet of the second drying tower 702 is communicated with the inlet of the oxygen storage tank 802 through a pipeline.
Optionally, conductivity meters are respectively arranged in the dissolving pool 1 and the salt chamber 503, and pH meters are respectively arranged in the acid chamber 502 and the alkali chamber 504.
Optionally, a fourth delivery pump 12 is also included, wherein: the input end of the fourth delivery pump 12 is communicated with the outlet of the salt chamber 503 through a pipeline, and the output end of the fourth delivery pump 12 is communicated with the inlet of the dissolving tank 1 through a pipeline.
In a specific mirabilite treatment process, the method for treating the mirabilite by using the device for electrolyzing the mirabilite by using the bipolar membrane electrodialysis device comprises the following steps:
A. mirabilite and soft water are mixed according to the mass ratio of 1: 3.4, respectively adding the mixed solution into the dissolving tank 1 from the inlet of the dissolving tank 1 to obtain a mixed solution; the mixed solution enters a sedimentation tank 2 and stands for 1-3 hours; then, the supernatant in the sedimentation tank 2 is conveyed into an ion exchange resin device 4 through a first conveying pump 3 for filtration to obtain filtrate;
B. conveying the filtrate in the step A into a salt chamber 503 of a bipolar membrane electrodialysis device 5 through a second conveying pump 10, then respectively adding soft water with the same volume as the filtrate in the step A into an acid chamber 502 and an alkali chamber 504, and then electrolyzing the bipolar membrane electrodialysis device 5 under the conditions that the voltage is 35-45V and the current is 25-35A;
C. when the conductivity of the filtrate in the salt chamber 503 is less than or equal to 20mS/cm, the electrolysis is stopped, and the filtrate enters a sewage discharge pipeline 9 through a third delivery pump 11 and is discharged or is delivered back to the dissolving tank 1 through a fourth delivery pump 12.
Optionally, in the step a, when the first ion exchange resin 401 of the ion exchange resin device 4 is used for filtering, the inlet of the second ion exchange resin 402 is closed, and the time for flushing the second ion exchange resin 402 with a sodium hydroxide solution with a mass percentage of 30% -70% is 1-2 h; when the second ion exchange resin 402 of the ion exchange resin device 4 is used for filtering operation, the inlet of the first ion exchange resin 401 is closed, and the first ion exchange resin 401 is washed by 30-70% by mass of sodium hydroxide solution for 1-2 hours.
Optionally, in the step A, the temperature of the soft water is 30-55 ℃;
in step B, when the bipolar membrane electrodialysis device 5 performs electrolysis, the gas in the first polar chamber 501 passes through the first drying tower 701 and then is introduced into the hydrogen storage tank 801, and the gas in the second polar chamber 505 passes through the second drying tower 702 and then is introduced into the oxygen storage tank 802.
Optionally, in step B, when the pH of the acid chamber 502 is 0, the solution in the acid chamber 502 is introduced into the acid solution storage tank 601; when the pH value of the alkali chamber 504 is 14, the solution in the alkali chamber 504 is introduced into the alkali solution storage tank 602.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed in a specific direction, and be operated, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The utility model provides an utilize bipolar membrane electrodialysis equipment electrolytic treatment mirabilite's device which characterized in that, including dissolving tank (1), sedimentation tank (2), first delivery pump (3), blowdown pipeline (9), second delivery pump (10), third delivery pump (11), ion exchange resin device (4) and bipolar membrane electrodialysis equipment (5), wherein:
an outlet of the dissolving tank (1) is communicated with an inlet of the sedimentation tank (2) through a pipeline and is arranged above the sedimentation tank (2);
the outlet of the sedimentation tank (2) is communicated with the input end of the first delivery pump (3) through a pipeline, and the output end of the first delivery pump (3) is communicated with the inlet of the ion exchange resin device (4) through a pipeline;
the outlet of the ion exchange resin device (4) is communicated with the input end of the second delivery pump (10) through a pipeline;
the bipolar membrane electrodialysis device (5) comprises a first polar chamber (501), an acid chamber (502), a salt chamber (503), a base chamber (504) and a second polar chamber (505);
the output end of the second conveying pump (10) is communicated with the inlet of the salt chamber (503) through a pipeline;
the outlet of the salt chamber (503) is communicated with the input end of the third delivery pump (11) through a pipeline, and the output end of the third delivery pump (11) is communicated with the sewage discharge pipeline (9).
2. The device for the electrolytic treatment of mirabilite using a bipolar membrane electrodialysis apparatus according to claim 1, characterized in that the ion exchange resin device (4) is composed of a first ion exchange resin (401) and a second ion exchange resin (402) connected in parallel, and the output end of the first transfer pump (3) is communicated with the inlet of the first ion exchange resin (401) and the inlet of the second ion exchange resin (402) through pipes, respectively; the outlet of the first ion exchange resin (401) and the outlet of the second ion exchange resin (402) are both communicated with the inlet of the salt chamber (503) through pipelines.
3. The device for electrolytically treating mirabilite by using a bipolar membrane electrodialysis device according to claim 1, further comprising an acid storage tank (601) and an alkali storage tank (602), wherein:
the acid liquid storage tank (601) and the alkali liquid storage tank (602) are both arranged below the bipolar membrane electrodialysis device (5), the outlet of the acid chamber (502) is communicated with the inlet of the acid liquid storage tank (601) through a pipeline, and the outlet of the alkali chamber (504) is communicated with the inlet of the alkali liquid storage tank (602) through a pipeline; the outlet of the acid liquor storage tank (601) and the outlet of the alkali liquor storage tank (602) are respectively communicated with one end of a concentration pipeline (13).
4. The device for electrolytically treating mirabilite using a bipolar membrane electrodialysis apparatus according to any one of claims 1 to 3, further comprising a drying tower (7), a hydrogen storage tank (801), and an oxygen storage tank (802), wherein:
the drying tower (7) comprises a first drying tower (701) and a second drying tower (702) which are arranged in parallel;
the inlet of the first drying tower (701) is communicated with the top end of the first polar chamber (501) through a pipeline, and the outlet of the first drying tower (701) is communicated with the inlet of the hydrogen storage tank (801) through a pipeline;
the inlet of the second drying tower (702) is communicated with the top end of the second polar chamber (505) through a pipeline, and the outlet of the second drying tower (702) is communicated with the inlet of the oxygen storage tank (802) through a pipeline.
5. The device for electrolytically treating mirabilite by using the bipolar membrane electrodialysis device according to any one of claims 1 to 3, wherein each of the dissolution tank (1) and the salt chamber (503) is provided with a conductivity meter, and each of the acid chamber (502) and the alkali chamber (504) is provided with a pH meter.
6. The device for the electrolytic treatment of mirabilite using a bipolar membrane electrodialysis apparatus according to any one of claims 1 to 3, further comprising a fourth transfer pump (12), wherein:
the input end of the fourth delivery pump (12) is communicated with the outlet of the salt chamber (503) through a pipeline, and the output end of the fourth delivery pump (12) is communicated with the inlet of the dissolving tank (1) through a pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922343544.9U CN212050903U (en) | 2019-12-23 | 2019-12-23 | Utilize device of bipolar membrane electrodialysis equipment electrolytic treatment mirabilite |
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| CN201922343544.9U CN212050903U (en) | 2019-12-23 | 2019-12-23 | Utilize device of bipolar membrane electrodialysis equipment electrolytic treatment mirabilite |
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