CN216711666U - Water treatment system for preventing calcium sulfate scaling - Google Patents
Water treatment system for preventing calcium sulfate scaling Download PDFInfo
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- CN216711666U CN216711666U CN202123183528.1U CN202123183528U CN216711666U CN 216711666 U CN216711666 U CN 216711666U CN 202123183528 U CN202123183528 U CN 202123183528U CN 216711666 U CN216711666 U CN 216711666U
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Abstract
A raw water pool conveys pretreated raw water to a primary membrane concentration unit through a first conveying pipeline; the primary membrane concentration unit is connected with the crystallization unit through a second conveying pipeline, a first lifting pump is arranged on the second conveying pipeline, the primary membrane concentration unit is used for concentrating the received raw water conveyed by the raw water pool, and the concentrated water is conveyed to the crystallization unit through the first lifting pump on the second conveying pipeline; the return pipeline is connected to a second conveying pipeline between the primary membrane concentration unit and the first lifting pump, and the crystallization unit is used for carrying out crystallization treatment on the received concentrated water conveyed by the primary membrane concentration unit; the return line is used for returning the calcium sulfate precipitation layer generated at the bottom of the crystallization unit to the second conveying line in front of the first lift pump. The utility model can prevent the scaling of the wall surfaces of pumps, pipelines and crystallization equipment, reduce the dosage of the scale inhibitor and the calcium sulfate crystal seeds and save the cost.
Description
Technical Field
The utility model relates to a water treatment system for preventing calcium sulfate scaling, and belongs to the technical field of water treatment.
Background
Calcium sulfate is slightly soluble in water and if too much is present, precipitation, i.e., scaling, occurs. In the water treatment process, because the saturation of calcium sulfate in the concentrated water is high, calcium sulfate is separated out from the concentrated water in the transportation process of the pump and the pipeline in the transportation process of the concentrated water, and part of calcium sulfate can scale on the wall surfaces of the pump and the pipeline, so that the pump and the pipeline are easily corroded, and the operation of the pump and the pipeline is influenced. In addition, the concentrated water entering the crystallization device is added with the seed crystal to separate out calcium sulfate crystals, the calcium sulfate crystals in the part are gradually deposited in the crystallization device, and a part of the calcium sulfate crystals inevitably adheres to the inner wall of the crystallization device to form a scale layer, so that the stable operation of the crystallization device is influenced.
At present, in the water treatment industry, for calcium sulfate type scaling, the descaling scheme mainly includes modes of adding a descaling agent, gypsum crystal seeds, physical descaling (mechanical, high-pressure water gun and ultrasonic waves) and the like, and a large amount of the descaling agent and the gypsum crystal seeds are added, so that the treatment cost is relatively high. There is a need for a water treatment solution that can prevent calcium sulfate scaling.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a water treatment system for preventing calcium sulfate scaling, and solves the problems that pumps and pipelines are easy to scale and the scaling treatment cost is high in the existing water treatment.
The technical scheme for solving the technical problems is as follows: a water treatment system for preventing calcium sulfate scaling comprises a raw water pool, a primary membrane concentration unit and a crystallization unit;
the raw water tank is connected with the primary membrane concentration unit through a first conveying pipeline and is used for conveying pretreated raw water to the primary membrane concentration unit through the first conveying pipeline;
the primary membrane concentration unit is connected with the crystallization unit through a second conveying pipeline, a first lifting pump is arranged on the second conveying pipeline, the primary membrane concentration unit is used for concentrating the received raw water conveyed by the raw water pool, and the primary membrane concentration unit is also used for conveying concentrated water to the crystallization unit through the first lifting pump on the second conveying pipeline;
the bottom end of the crystallization unit is connected with a return pipeline, the return pipeline is connected to the second conveying pipeline between the primary membrane concentration unit and the first lift pump, and the crystallization unit is used for carrying out crystallization treatment on the received concentrated water conveyed by the primary membrane concentration unit;
the return pipeline is used for returning a calcium sulfate precipitation layer generated at the bottom of the crystallization unit to the second conveying pipeline in front of the first lifting pump.
As a preferable scheme of the water treatment system for preventing calcium sulfate scaling, a first check valve is arranged on the second conveying pipeline between the first lifting pump and the crystallization unit, and a first butterfly valve is further arranged on the second conveying pipeline between the first check valve and the crystallization unit.
As a preferred scheme of the water treatment system for preventing calcium sulfate scaling, the system further comprises a second lift pump, wherein the second lift pump is connected to the first conveying pipeline, and is used for conveying raw water pretreated by the raw water tank to the primary membrane concentration unit.
As a preferred scheme of the water treatment system for preventing calcium sulfate scaling, a second check valve is arranged on the first conveying pipeline between the second lifting pump and the primary membrane concentration unit, and a second butterfly valve is further arranged between the second check valve and the primary membrane concentration unit.
As a preferred scheme of the water treatment system for preventing calcium sulfate scaling, the system further comprises a sludge concentration tank, and the return pipeline is further connected to the sludge concentration tank; the sludge concentration tank is used for filtering part of calcium sulfate precipitation layer generated at the bottom of the crystallization unit to obtain a gypsum product;
and the return pipeline is connected with a third butterfly valve.
The water treatment system for preventing calcium sulfate scaling preferably further comprises a secondary membrane concentration unit, the crystallization unit is communicated with the secondary membrane concentration unit through a third conveying pipeline, and the secondary membrane concentration unit is used for carrying out secondary concentration on the received produced water of the crystallization unit.
As a preferred scheme of the water treatment system for preventing calcium sulfate scaling, the system further comprises a water producing tank, wherein the secondary membrane concentration unit is connected with the water producing tank through a fourth conveying pipeline, and the water producing tank is used for receiving the water produced after the concentration treatment of the secondary membrane concentration unit;
and a fourth butterfly valve is connected to the fourth conveying pipeline.
As a preferred scheme of the water treatment system for preventing calcium sulfate scaling, the primary membrane concentration unit is connected with the water production tank through a fifth conveying pipeline, and the water production tank is also used for receiving the water produced after the concentration treatment of the primary membrane concentration unit;
and a fifth butterfly valve is connected to the fifth conveying pipeline.
The system has the advantages that the raw water tank is connected with the primary membrane concentration unit through the first conveying pipeline and is used for conveying pretreated raw water to the primary membrane concentration unit through the first conveying pipeline; the primary membrane concentration unit is connected with the crystallization unit through a second conveying pipeline, a first lifting pump is arranged on the second conveying pipeline, the primary membrane concentration unit is used for concentrating the received raw water conveyed by the raw water pool, and the primary membrane concentration unit is also used for conveying concentrated water to the crystallization unit through the first lifting pump on the second conveying pipeline; the bottom end of the crystallization unit is connected with a return pipeline, the return pipeline is connected to a second conveying pipeline between the primary membrane concentration unit and the first lift pump, and the crystallization unit is used for carrying out crystallization treatment on the received concentrated water conveyed by the primary membrane concentration unit; the return line is used for returning the calcium sulfate precipitation layer generated at the bottom of the crystallization unit to the second conveying line in front of the first lift pump. The utility model can not only prevent the scaling of the wall surfaces of a pump, a pipeline and crystallization equipment, but also reduce the dosage of the scale inhibitor and the calcium sulfate crystal seed, thereby saving the cost; the crystal seeds flow back to the front of the pump, precipitated calcium sulfate is attached to the surfaces of the crystal seeds, the concentration of calcium sulfate at the inlet of the crystallization unit is reduced, the wall surface of the crystallization device is prevented from scaling, the processing load of the crystallization unit is reduced, and the service life of the crystallization unit is prolonged; can reduce the concentration of calcium sulfate in the concentrated water, further reduce the hardness of calcium and effectively reduce the scaling tendency of subsequent water treatment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a schematic diagram of a water treatment system for preventing calcium sulfate scaling provided in an embodiment of the present invention.
In the figure, 1, a raw water pool; 2. a first-stage membrane concentration unit; 3. a crystallization unit; 4. a first delivery line; 5. a second delivery line; 6. a first lift pump; 7. a return line; 8. a first check valve; 9. a first butterfly valve; 10. a second lift pump; 11. a second check valve; 12. a second butterfly valve; 13. a sludge concentration tank; 14. a third butterfly valve; 15. a secondary membrane concentration unit; 16. a third delivery line; 17. a water producing pool; 18. a fourth delivery line; 19. a fourth butterfly valve; 20. a fifth delivery line; 21. and a fifth butterfly valve.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides a water treatment system for preventing calcium sulfate scaling, including a raw water tank 1, a primary membrane concentration unit 2, and a crystallization unit 3;
the raw water tank 1 is connected with the primary membrane concentration unit 2 through a first conveying pipeline 4, and the raw water tank 1 is used for conveying pretreated raw water to the primary membrane concentration unit 2 through the first conveying pipeline 4;
the primary membrane concentration unit 2 is connected with the crystallization unit 3 through a second conveying pipeline 5, a first lifting pump 6 is arranged on the second conveying pipeline 5, the primary membrane concentration unit 2 is used for concentrating raw water conveyed by the received raw water pool 1, and the primary membrane concentration unit 2 is also used for conveying concentrated water to the crystallization unit 3 through the first lifting pump 6 on the second conveying pipeline 5;
the bottom end of the crystallization unit 3 is connected with a return pipeline 7, the return pipeline 7 is connected to a second conveying pipeline 5 between the primary membrane concentration unit 2 and the first lift pump 6, and the crystallization unit 3 is used for carrying out crystallization treatment on the received concentrated water conveyed by the primary membrane concentration unit 2;
the return line 7 is used for returning the precipitated calcium sulphate layer produced at the bottom of the crystallization unit 3 to the second conveying line 5 before the first lift pump 6.
In this embodiment, because the return line 7 is connected to the front end of the first lift pump 6, the calcium sulfate precipitation layer generated at the bottom of the crystallization unit 3 flows back through the return line 7 as a seed crystal, and is mixed with the concentrated water to be introduced into the crystallization unit 3, because the affinity of calcium sulfate in the concentrated water for calcium sulfate crystals is much greater than that of the pump and the pipeline wall surface, calcium sulfate is preferentially attached to the surface of the calcium sulfate seed crystal after being precipitated, rather than being attached to the wall surfaces of the pump and the pipeline, and the problem of scaling of calcium sulfate in the pump and the pipeline wall surface in the concentrated water is effectively prevented through seed crystal backflow.
In this embodiment, a first check valve 8 is disposed on the second conveying pipeline 5 between the first lift pump 6 and the crystallization unit 3, and a first butterfly valve 9 is further disposed on the second conveying pipeline 5 between the first check valve 8 and the crystallization unit 3.
Specifically, the first check valve 8 is disposed at the rear end of the first lift pump 6, that is, on the second conveying pipe 5 close to the crystallization unit 3, and the first check valve 8 can function as a check function of the second conveying pipe 5, and at the same time, the conveyance control of the second conveying pipe 5 can be realized in cooperation with the first butterfly valve 9.
In this embodiment, the membrane bioreactor further comprises a second lift pump 10, the second lift pump 10 is connected to the first conveying pipeline 4, and the second lift pump 10 is used for conveying the raw water pretreated by the raw water tank 1 to the first-stage membrane concentration unit 2. A second check valve 11 is arranged on the first conveying pipeline 4 between the second lifting pump 10 and the first-stage membrane concentration unit 2, and a second butterfly valve 12 is further arranged on the second conveying pipeline 5 between the second check valve 11 and the first-stage membrane concentration unit 2.
Specifically, after the raw water in the raw water tank 1 is pretreated (flocculation, primary filtration, etc.), the raw water is conveyed to the primary membrane concentration unit 2 by the second lift pump 10 to be concentrated. The concentrated water after the concentration treatment is conveyed to the crystallization unit 3 through the first lifting pump 6, and the concentrated water after the concentration treatment is mixed with the calcium sulfate sediment refluxed by the reflux pipeline 7 in the conveying process of the second conveying pipeline 5.
Specifically, the second check valve 11 is disposed at the rear end of the second lift pump 10, that is, on the first conveying pipeline 4 close to the first-stage membrane concentration unit 2, and the second check valve 11 can function as a check function of the first conveying pipeline 4, and at the same time, the conveyance control of the first conveying pipeline 4 can be realized by cooperating with the second butterfly valve 12.
In this embodiment, the system further comprises a sludge concentration tank 13, and the return pipeline 7 is further connected to the sludge concentration tank 13; the sludge concentration tank 13 is used for performing filter pressing treatment on part of the calcium sulfate precipitation layer generated at the bottom of the crystallization unit 3 to obtain a gypsum product.
Specifically, a part of the calcium sulfate precipitation layer generated at the bottom of the crystallization unit 3 flows back to the crystallization unit 3 through the return line 7 and is mixed with the concentrated calcium sulfate water with higher saturation entering the first lift pump 6 and the second conveying line 5, and due to the induction effect of the calcium sulfate crystals, the calcium sulfate precipitated in the concentrated water is preferentially attached to the calcium sulfate crystals instead of depositing on the walls of the first lift pump 6 and the second conveying line 5 to form a fouling layer; and the other part of the calcium sulfate precipitation layer in the crystallization unit 3 is discharged into the sludge concentration tank 13 and then is subjected to filter pressing treatment to generate a gypsum product, so that the economic benefit is increased.
In this embodiment, the return line 7 is connected to a third butterfly valve 14, and the delivery of the return line 7 can be controlled by the third butterfly valve 14.
In this embodiment, the system further comprises a secondary membrane concentration unit 15, the crystallization unit 3 is communicated with the secondary membrane concentration unit 15 through a third conveying pipeline 16, and the secondary membrane concentration unit 15 is used for performing secondary concentration on the received produced water of the crystallization unit 3.
Specifically, the produced water treated by the crystallization unit 3 is conveyed to the secondary membrane concentration unit 15 through the third conveying pipeline 16 for subsequent secondary concentration, so that the water treatment effect is further improved.
In this embodiment, the system further comprises a water production tank 17, the secondary membrane concentration unit 15 is connected with the water production tank 17 through a fourth conveying pipeline 18, and the water production tank 17 is used for receiving the water produced after the concentration treatment of the secondary membrane concentration unit 15; a fourth butterfly valve 19 is connected to the fourth feed line 18. The primary membrane concentration unit 2 is connected with a water producing tank 17 through a fifth conveying pipeline 20, and the water producing tank 17 is also used for receiving the water produced after the concentration treatment of the primary membrane concentration unit 2; a fifth butterfly valve 21 is connected to the fifth delivery pipe 20.
Specifically, the fourth conveying pipeline 18 and the fourth butterfly valve 19 are matched to control the water produced by the second-stage membrane concentration unit 15 to be conveyed to the water producing pool 17, and the fifth conveying pipeline 20 and the fifth butterfly valve 21 are matched to control the water produced by the first-stage membrane concentration unit 2 to be conveyed to the water producing pool 17. The water produced by the primary membrane concentration unit 2 and the secondary membrane concentration unit 15 is received by the water producing tank 17, and the water produced by the water producing tank 17 can be reused.
In summary, in the present invention, the raw water tank 1 is connected to the primary membrane concentration unit 2 through the first conveying pipeline 4, and the raw water tank 1 is used for conveying the pretreated raw water to the primary membrane concentration unit 2 through the first conveying pipeline 4; the primary membrane concentration unit 2 is connected with the crystallization unit 3 through a second conveying pipeline 5, a first lifting pump 6 is arranged on the second conveying pipeline 5, the primary membrane concentration unit 2 is used for concentrating raw water conveyed by the received raw water pool 1, and the primary membrane concentration unit 2 is also used for conveying concentrated water to the crystallization unit 3 through the first lifting pump 6 on the second conveying pipeline 5; the bottom end of the crystallization unit 3 is connected with a return pipeline 7, the return pipeline 7 is connected to a second conveying pipeline 5 between the primary membrane concentration unit 2 and the first lift pump 6, and the crystallization unit 3 is used for carrying out crystallization treatment on the received concentrated water conveyed by the primary membrane concentration unit 2; the return line 7 is used for returning the precipitated calcium sulphate layer produced at the bottom of the crystallization unit 3 to the second conveying line 5 before the first lift pump 6. The utility model can not only prevent the scaling of the wall surfaces of a pump, a pipeline and crystallization equipment, but also reduce the dosage of the scale inhibitor and the calcium sulfate crystal seeds, and can realize the crystallization circulation in the whole operation state only by adding a proper amount of crystal seeds in the initial state to initiate the crystallization circulation process in the crystallization unit 3, thereby reducing the cost of adding the crystal seeds and saving the operation cost; the addition and the backflow of the calcium sulfate crystal seeds simultaneously reduce the dosage of a subsequent softening scheme and also greatly reduce the medicament cost; the crystal seeds flow back to the front of the pump, the precipitated calcium sulfate is attached to the surfaces of the crystal seeds, the concentration of the calcium sulfate at the inlet of the crystallization unit 3 is reduced, the wall surface of the crystallization device is prevented from scaling, the processing load of the crystallization unit 3 is reduced, and the service life of the crystallization unit 3 is prolonged; can reduce the concentration of calcium sulfate in the concentrated water, further reduce the hardness of calcium, and effectively reduce the scaling tendency of subsequent water treatment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A water treatment system for preventing calcium sulfate scaling is characterized by comprising a raw water pool (1), a primary membrane concentration unit (2) and a crystallization unit (3);
the raw water tank (1) is connected with the primary membrane concentration unit (2) through a first conveying pipeline (4), and the raw water tank (1) is used for conveying pretreated raw water to the primary membrane concentration unit (2) through the first conveying pipeline (4);
the primary membrane concentration unit (2) is connected with the crystallization unit (3) through a second conveying pipeline (5), a first lifting pump (6) is arranged on the second conveying pipeline (5), the primary membrane concentration unit (2) is used for concentrating received raw water conveyed by the raw water tank (1), and the primary membrane concentration unit (2) is also used for conveying concentrated water to the crystallization unit (3) through the first lifting pump (6) on the second conveying pipeline (5);
the bottom end of the crystallization unit (3) is connected with a return pipeline (7), the return pipeline (7) is connected to the second conveying pipeline (5) between the primary membrane concentration unit (2) and the first lift pump (6), and the crystallization unit (3) is used for carrying out crystallization treatment on the received concentrated water conveyed by the primary membrane concentration unit (2);
the return pipeline (7) is used for returning a calcium sulfate precipitation layer generated at the bottom of the crystallization unit (3) to the second conveying pipeline (5) in front of the first lifting pump (6).
2. A water treatment system for preventing calcium sulphate scaling according to claim 1, wherein a first check valve (8) is arranged on the second transportation pipeline (5) between the first lift pump (6) and the crystallization unit (3), and a first butterfly valve (9) is further arranged on the second transportation pipeline (5) between the first check valve (8) and the crystallization unit (3).
3. The water treatment system for preventing calcium sulfate scaling according to claim 1, further comprising a second lift pump (10), wherein the second lift pump (10) is connected to the first conveying pipeline (4), and the second lift pump (10) is used for conveying raw water pretreated by the raw water tank (1) to the primary membrane concentration unit (2).
4. A water treatment system for preventing calcium sulphate scaling according to claim 3, wherein a second check valve (11) is arranged on the first transfer line (4) between the second lift pump (10) and the primary membrane concentration unit (2), and a second butterfly valve (12) is arranged between the second check valve (11) and the primary membrane concentration unit (2).
5. A water treatment system for preventing calcium sulphate scaling according to claim 4, further comprising a sludge concentration tank (13), wherein the return line (7) is further connected to the sludge concentration tank (13); the sludge concentration tank (13) is used for filtering part of calcium sulfate precipitation layer generated at the bottom of the crystallization unit (3) into a gypsum product;
and a third butterfly valve (14) is connected to the return pipeline (7).
6. A water treatment system for preventing calcium sulphate scaling according to claim 1, further comprising a secondary membrane concentration unit (15), wherein the crystallization unit (3) is communicated with the secondary membrane concentration unit (15) via a third transfer line (16), and the secondary membrane concentration unit (15) is used for carrying out secondary concentration on the received water produced by the crystallization unit (3).
7. The water treatment system for preventing calcium sulfate scaling according to claim 6, further comprising a water production tank (17), wherein the secondary membrane concentration unit (15) is connected to the water production tank (17) through a fourth conveying pipeline (18), and the water production tank (17) is used for receiving the water produced after the concentration treatment of the secondary membrane concentration unit (15);
and a fourth butterfly valve (19) is connected to the fourth conveying pipeline (18).
8. The water treatment system for preventing calcium sulfate scaling according to claim 7, wherein the primary membrane concentration unit (2) is connected to the water production tank (17) through a fifth transfer pipeline (20), and the water production tank (17) is further configured to receive the water produced after the concentration treatment of the primary membrane concentration unit (2);
and a fifth butterfly valve (21) is connected to the fifth conveying pipeline (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123183528.1U CN216711666U (en) | 2021-12-17 | 2021-12-17 | Water treatment system for preventing calcium sulfate scaling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123183528.1U CN216711666U (en) | 2021-12-17 | 2021-12-17 | Water treatment system for preventing calcium sulfate scaling |
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| Publication Number | Publication Date |
|---|---|
| CN216711666U true CN216711666U (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123183528.1U Active CN216711666U (en) | 2021-12-17 | 2021-12-17 | Water treatment system for preventing calcium sulfate scaling |
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| CN (1) | CN216711666U (en) |
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2021
- 2021-12-17 CN CN202123183528.1U patent/CN216711666U/en active Active
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