Gypsum slurry recycling and purifying device

Abstract

The utility model relates to the technical field of environmental protection, and discloses a gypsum slurry recovery and purification device, which comprises coagulating sedimentation and filtration modules which are sequentially communicated through pipelines and are used for carrying out primary treatment on gypsum slurry; the ultrafiltration module is communicated with the coagulating sedimentation filtration module and is used for separating substances with different molecular sizes; and the disinfection module is communicated with the ultrafiltration module and is used for disinfection. Compared with the prior art, the device has the beneficial effects that the high-concentration gypsum slurry is fully and effectively recycled and purified so as to meet the environmental protection requirement of a power plant, the purification efficiency is high, the effluent quality is better, and long-term stable automatic operation can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, in particular to a gypsum slurry recovery and purification device. Background Art

[0002] The high concentration of suspended solids in the gypsum slurry of coal-fired power plants seriously affects the turbidity of the water, and is prone to scaling in equipment and pipelines, affecting the operation of the desulfurization device. With the recycling of desulfurization liquid, the chloride ions and fluoride ions in the desulfurization liquid are continuously enriched. Fluoride ions will form a complex with aluminum in the slurry (aluminum brought in by fly ash generated by coal combustion, desulfurization limestone, etc.), thereby hindering the dissolution of lime powder in the lime slurry, causing the effective components of the slurry to decrease and the desulfurization efficiency to decrease.

[0003] The traditional three-unit process can only process primary gypsum slurry, but the high-concentration gypsum slurry downstream cannot be effectively treated, making it difficult to meet environmental protection requirements. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the utility model provides a gypsum slurry recovery and purification device, which can effectively recover and purify high-concentration gypsum slurry.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a gypsum slurry recovery and purification device, comprising:

[0006] The coagulation sedimentation filtration modules are sequentially connected through pipelines and are used to preliminarily treat the gypsum slurry;

[0007] The ultrafiltration module is connected to the coagulation sedimentation filtration module and is used to separate substances of different molecular sizes;

[0008] The disinfection module is connected to the ultrafiltration module and is used for disinfection.

[0009] The coagulation sedimentation filtration module comprises a regulating tank, a coagulation sedimentation tank connected to the regulating tank, and a fine grid tank connected to the coagulation sedimentation tank, which are sequentially connected through pipelines.

[0010] The ultrafiltration module comprises an ultrafiltration membrane pool, which is connected to a fine grid pool through a pipeline, and an ultrafiltration water pump is arranged on the pipeline.

[0011] The disinfection module comprises an ozone oxidation pool, which is connected to an activated carbon filter through a pipeline, and an ozone generator is installed in the ozone oxidation pool.

[0012] It also includes a clean water pool arranged behind the disinfection module which is connected via a pipeline, and a clean water pump is arranged on the pipeline.

[0013] A coagulation and dosing device is arranged in the coagulation and sedimentation tank.

[0014] An ultrafiltration water pump flow meter is also provided.

[0015] A clean water pump flow meter is also provided.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The first module of this device is coagulation sedimentation filtration, which precipitates in the coagulation sedimentation tank and is filtered by a fine grid, so that the gypsum slurry is preliminarily treated. The second module is ultrafiltration, which uses pressurized membrane separation technology to separate substances of different molecular sizes to achieve a higher separation effect. The third module is oxidation disinfection, which uses ozone produced by an ozone generator to carry out oxidation disinfection in an ozone oxidation tank, followed by adsorption treatment with activated carbon, and finally sent to a clean water tank by a clean water pump, so as to fully and effectively recover and purify the high-concentration gypsum slurry to meet the environmental protection requirements of the power plant and achieve long-term stable automatic operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] The numbers shown in the accompanying drawings are: 1. regulating tank; 2. coagulation sedimentation tank; 3. coagulation dosing device; 4. fine grid tank; 5. ultrafiltration water pump; 6. ultrafiltration water pump flow meter; 7. ultrafiltration membrane tank; 8. ozone oxidation tank; 9. ozone generator; 10. activated carbon filter; 11. clean water pump; 12. clean water pump flow meter; 13. clean water tank. DETAILED DESCRIPTION

[0020] In conjunction with specific embodiments, the present invention will be further described. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0021] like Figure 1 As shown, the utility model discloses a gypsum slurry recovery and purification device, comprising:

[0022] The coagulation sedimentation filtration modules are sequentially connected through pipelines and are used to preliminarily treat the gypsum slurry;

[0023] The ultrafiltration module is connected to the coagulation sedimentation filtration module and is used to separate substances of different molecular sizes;

[0024] The disinfection module is connected to the ultrafiltration module and is used for disinfection.

[0025] Specifically, the coagulation sedimentation filtration module includes a regulating tank 1 connected in sequence through a pipeline, a coagulation sedimentation tank 2 connected to the regulating tank 1, and a fine grid tank 4 connected to the coagulation sedimentation tank 2. The ultrafiltration module includes an ultrafiltration membrane tank 7, and the ultrafiltration membrane tank 7 is connected to the fine grid tank 4 through a pipeline, and an ultrafiltration water pump 5 and an ultrafiltration water pump flowmeter 6 are arranged on the pipeline. The disinfection module includes an ozone oxidation tank 8, and the ozone oxidation tank 8 is connected to an activated carbon filter 10 through a pipeline. An ozone generator 9 is installed in the ozone oxidation tank 8, and it also includes a clean water tank 13 arranged behind the disinfection module connected through a pipeline, and a clean water pump 11 and a clean water pump flowmeter 12 are arranged on the pipeline.

[0026] In order to further enhance the flocculation and sedimentation effect, a coagulation and dosing device 3 is provided in the coagulation and sedimentation tank 2, and a coagulant, such as polyacrylamide, is added into the coagulation and sedimentation tank through the coagulation and dosing device.

[0027] The specific workflow is as follows

[0028] The gypsum slurry enters the regulating tank 1, which is used to prevent uneven water quality and unstable water volume from affecting the subsequent treatment effect. The slurry after the regulating tank enters the coagulation sedimentation tank 2 for coagulation and sedimentation of large particles to reduce the turbidity of the slurry, and then passes through the fine grid tank 4 for filtration. The fine grid effluent is transported by the ultrafiltration water pump 5 into the core equipment ultrafiltration membrane tank 7, and the flow is monitored by the ultrafiltration water pump flowmeter 6. The ultrafiltration membrane tank 7 uses membrane separation technology to achieve the separation of substances with different micron particle sizes. The effluent after ultrafiltration is transferred to the ozone oxidation tank 8, and the ozone produced by the ozone generator 9 is oxidized and disinfected, and then enters the activated carbon filter 10 for adsorption. The final output water is sent to the clean water tank 13 for storage by the clean water pump 11, and the flow is monitored by the clean water pump flowmeter. This device can fully and effectively recycle and purify high-concentration gypsum slurry to meet the environmental protection requirements of the power plant, and has high purification efficiency, good effluent water quality, and can achieve long-term stable automatic operation.

Claims

1. A gypsum slurry recovery and purification device, It is characterized in that include: The coagulation sedimentation filtration modules are sequentially connected through pipelines and are used to preliminarily treat the gypsum slurry; The ultrafiltration module is connected to the coagulation sedimentation filtration module and is used to separate substances of different molecular sizes; The disinfection module is connected to the ultrafiltration module and is used for disinfection.

2. A gypsum slurry recovery and purification device according to claim 1, It is characterized in that The coagulation sedimentation filtration module comprises a regulating tank (1), a coagulation sedimentation tank (2) connected to the regulating tank (1), and a fine grid tank (4) connected to the coagulation sedimentation tank (2), which are sequentially connected via pipelines.

3. A slurry recovery and purification device according to claim 2, It is characterized in that The ultrafiltration module comprises an ultrafiltration membrane pool (7), the ultrafiltration membrane pool (7) is connected to a fine grid pool (4) via a pipeline, and an ultrafiltration water pump (5) is provided on the pipeline.

4. A gypsum slurry recovery and purification device according to claim 3, It is characterized in that The disinfection module comprises an ozone oxidation pool (8), the ozone oxidation pool (8) is connected to an activated carbon filter (10) via a pipeline, and an ozone generator (9) is installed in the ozone oxidation pool (8).

5. A gypsum slurry recovery and purification device according to claim 1, It is characterized in that It also includes a clean water pool (13) arranged behind the disinfection module and connected via a pipeline, and a clean water pump (11) is arranged on the pipeline.

6. A gypsum slurry recovery and purification device according to claim 2, It is characterized in that A coagulation and dosing device (3) is provided in the coagulation and sedimentation tank (2).

7. A gypsum slurry recovery and purification device according to claim 3, It is characterized in that An ultrafiltration water pump flow meter (6) is also provided.

8. A gypsum slurry recovery and purification device according to claim 5, It is characterized in that A clean water pump flow meter (12) is also provided.

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