Phosphorite flotation wastewater pre-coating filtering device

Abstract

The utility model discloses a phosphorite flotation wastewater pre-coating filtering device, and particularly relates to the technical field of phosphorus chemical industry, the phosphorite flotation wastewater pre-coating filtering device comprises an automatic backwashing surface filter, a clear liquid pool, a slurry pool, a buffer pool, a pre-coating groove and a stock solution inlet pipe, and the automatic backwashing surface filter is communicated with the clear liquid pool, the slurry pool, the buffer pool and the pre-coating groove through pipelines; and the stock solution inlet pipe is arranged above the buffer pool. After phosphorite is floated, a large amount of superfine phosphorite, flotation reagent colloid and the like enter the thickener together, clear liquid discharged from the thickener enters the buffer tank, prepared phosphogypsum pre-coating liquid is pumped into automatic backwashing surface filter equipment by a pump to be pre-coated, and then the phosphogypsum pre-coating liquid is pumped into feed backwater to be subjected to rapid and effective solid-liquid separation; the filtered liquid is clear and transparent through visual inspection, the turbidity is basically below 1NTU (scattering turbidity), the equipment performs automatic back-flushing deslagging after filtration, the program is circularly operated, and the use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphorus chemical industry, in particular to a pre-coating filter device for phosphate rock flotation wastewater. Background Art

[0002] Most existing methods for filtering phosphate flotation wastewater rely on direct filtration, often using plate and frame filter presses, filter rods, or membrane filtration. This method uses a pressure differential to force the raw water through, allowing water and particles smaller than the membrane pores to pass through, while particles larger than the pores are retained. Over time, these retained particles form a filter cake layer on the membrane surface, increasing filtration resistance and significantly reducing filtration efficiency. Sticky substances in the raw water adhere to the membrane surface and are difficult to remove, preventing continuous operation. Cleaning with acidic or alkaline cleaning solutions is also ineffective.

[0003] After the phosphate rock is flotated, a large amount of ultrafine phosphate rock, flotation agent colloid, etc. enter the thickener together. When entering the thickener, flocculants are added for flocculation and precipitation. The clear liquid of the thickener still carries some ultrafine phosphate rock, agents and other substances and cannot be directly reused.

[0004] In order to solve the problems in the above background technology, the utility model provides a pre-coating filter device for phosphate rock flotation wastewater. Utility Model Content

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The utility model discloses a pre-coating filter device for phosphate rock flotation wastewater, comprising an automatic backwash surface filter, a clear liquid tank, a slurry tank, a buffer tank, a pre-coating tank and a raw liquid inlet pipe. The automatic backwash surface filter is interconnected with the clear liquid tank, the slurry tank, the buffer tank and the pre-coating tank through pipelines. A crushed gypsum slag pipe is provided above the pre-coating tank, and the raw liquid inlet pipe is provided above the buffer tank.

[0007] As a preferred technical solution of the present invention, a clear liquid reflux valve is fixedly connected to the pipeline between the automatic backwash surface filter and the pre-coating tank, and the clear liquid reflux valve is arranged on a side close to the automatic backwash surface filter.

[0008] As an optimal technical solution of the present invention, another pipe is connected between the automatic backwash surface filter and the pre-coating tank, and a liquid inlet reflux valve is fixedly connected to the pipe. The pipe fixedly connected to the liquid inlet reflux valve is located above the buffer tank.

[0009] As an optimal technical solution of the present invention, the pipeline on which the liquid inlet and reflux valve is installed is fixedly connected to a liquid inlet pump through another pipeline, the liquid inlet pump is fixedly connected to a horizontal pipe, the horizontal pipe is fixedly connected to the liquid inlet valve and the pre-coat liquid inlet pump, the liquid inlet and reflux valve is arranged on the side close to the automatic backwash surface filter, and the liquid inlet valve is arranged above the buffer tank.

[0010] As an optimal technical solution of the present utility model, the bottom of the automatic backwash surface filter is fixedly connected to a slag discharge pipe, and the slag discharge pipe is fixedly connected to a slag discharge valve. The bottom of the slag discharge pipe is located inside the slurry pool, and the interior of the slurry pool is connected to the automatic backwash surface filter through another pipe, and the pipe is fixedly connected to a backwash valve.

[0011] As a preferred technical solution of the present invention, the automatic backwash surface filter is connected to the clear liquid tank through a pipeline, and the bottom of the pipeline is located inside the clear liquid tank.

[0012] The beneficial effects of the utility model are as follows: in the utility model, after the phosphate rock is flotated, a large amount of ultrafine phosphate rock, flotation agent colloid, etc. enter the thickener together; the clear liquid from the thickener goes to the buffer tank; the prepared phosphogypsum pre-coating liquid is first pumped into the automatic backwash surface filter equipment by a pump for pre-coating, and then the feed return water is pumped into the filter to perform fast and effective solid-liquid separation; the liquid after filtration is visually clear and bright, and the turbidity is basically below 1NTU (scattered turbidity); after filtration, the equipment automatically backwashes and discharges slag, and the program runs in a cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the overall process of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0016] In the figure: 1. Automatic backwash surface filter; 2. Clean liquid tank; 3. Slurry tank; 4. Buffer tank; 5. Pre-coating tank; 6. Raw liquid inlet pipe; 7. Pre-coating liquid inlet pump; 8. Liquid inlet reflux valve; 9. Liquid inlet valve; 10. Clean liquid reflux valve; 11. Liquid inlet pump; 12. Slag discharge valve; 13. Slag discharge pipe; 14. Backflush valve. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0018] Example: Figures 1 to 2 As shown, the utility model phosphate rock flotation wastewater pre-coating filter device includes an automatic backwash surface filter 1, a clear liquid tank 2, a slurry tank 3, a buffer tank 4, a pre-coating tank 5 and a raw liquid inlet pipe 6. The automatic backwash surface filter 1 is interconnected with the clear liquid tank 2, the slurry tank 3, the buffer tank 4 and the pre-coating tank 5 through a pipeline. A crushed gypsum slag pipe is provided above the pre-coating tank 5, and the raw liquid inlet pipe 6 is provided above the buffer tank 4. By arranging the automatic backwash surface filter 1, the clear liquid tank 2, the slurry tank 3, the buffer tank 4, the pre-coating tank 5 and the raw liquid inlet pipe 6, it is easier to make the filtered liquid clear and bright, and the turbidity is basically below 1NTU (scattered turbidity). After filtration, the equipment automatically backwashes and discharges slag, and the program runs in a cycle, which is more convenient to use.

[0019] A clear liquid reflux valve 10 is fixedly connected to the pipeline between the automatic backwash surface filter 1 and the pre-coating tank 5. By setting the clear liquid reflux valve 10, it is easier to control the discharge of materials between the automatic backwash surface filter 1 and the pre-coating tank 5, and it is more convenient to use; the clear liquid reflux valve 10 is set on the side close to the automatic backwash surface filter 1.

[0020] Another pipe is connected between the automatic backwash surface filter 1 and the pre-coating tank 5, and a liquid inlet reflux valve 8 is fixedly connected to the pipe. The pipe fixedly connected to the liquid inlet reflux valve 8 is located above the buffer tank 4. The provision of the liquid inlet reflux valve 8 makes it easier to return the clear liquid to the inside of the buffer tank 4.

[0021] The pipeline on which the liquid inlet and reflux valve 8 is installed is fixedly connected to a liquid inlet pump 11 through another pipeline, and a cross pipe is fixedly connected to the liquid inlet pump 11, and the cross pipe is fixedly connected to the liquid inlet valve 9 and the pre-coat liquid inlet pump 7. By setting the liquid inlet valve 9, it is possible to more conveniently transport the material in the buffer tank 4; the liquid inlet and reflux valve 8 is arranged on the side close to the automatic backwash surface filter 1, and the liquid inlet valve 9 is arranged above the buffer tank 4; by setting the liquid inlet pump 11, it is possible to more conveniently transport the material in the buffer tank 4.

[0022] The bottom of the automatic backwash surface filter 1 is fixedly connected to a slag discharge pipe 13. The slag discharge pipe 13 fixedly connected to the bottom of the automatic backwash surface filter 1 can more conveniently discharge the slag in the wastewater into the slurry pool 3 for treatment, which is more convenient to use; the slag discharge pipe 13 is fixedly connected to a slag discharge valve 12. The slag discharge valve 12 fixedly connected to the slag discharge pipe 13 can more conveniently discharge the slag in the automatic backwash surface filter 1 into the slurry pool 3; the bottom of the slag discharge pipe 13 is located inside the slurry pool 3, and the interior of the slurry pool 3 is interconnected with the automatic backwash surface filter 1 through another pipe, and a backflush valve 14 is fixedly connected to the pipe; by setting the backflush valve 14, it is more convenient to perform secondary treatment on the liquid in the slurry pool 3, which is more convenient to use.

[0023] The automatic backwash surface filter 1 is connected to the clear liquid tank 2 through a pipeline, and the bottom of the pipeline is located inside the clear liquid tank 2; by utilizing the pipeline between the automatic backwash surface filter 1 and the clear liquid tank 2, it is more convenient to transport the clear liquid in the clear liquid tank 2.

[0024] During operation, after the phosphate rock is flotation-extracted, it generally enters a rotary filter or a belt filter for filtration. The intercepted slag is phosphogypsum. The phosphogypsum produced by the system is directly taken and added to raw water for pre-coating treatment liquid. The concentration is about 10%, and it is directly injected into the filter for pre-coating. A layer of phosphogypsum is evenly attached to the surface of the filter element in the filter, and then the raw water is added for filtration. The turbidity of the filtered liquid can reach below 1NTU (scattered turbidity), and the surface of the filter membrane is clean and free of attachments after each backwash.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. Phosphate rock flotation wastewater pre-coating filter device, characterized in that: The invention comprises an automatic backwash surface filter (1), a clear liquid tank (2), a slurry tank (3), a buffer tank (4), a pre-coating tank (5), and a raw liquid inlet pipe (6); the automatic backwash surface filter (1) is interconnected with the clear liquid tank (2), the slurry tank (3), the buffer tank (4), and the pre-coating tank (5) through pipelines; a crushed gypsum slag pipe is provided above the pre-coating tank (5); and the raw liquid inlet pipe (6) is provided above the buffer tank (4).

2. The phosphate rock flotation wastewater pre-coating filter device according to claim 1, characterized in that: A clear liquid reflux valve (10) is fixedly connected to the pipeline between the automatic backwashing surface filter (1) and the pre-coating tank (5), and the clear liquid reflux valve (10) is arranged on a side close to the automatic backwashing surface filter (1).

3. The phosphate rock flotation wastewater pre-coating filter device according to claim 1, characterized in that: Another pipe is connected between the automatic backwash surface filter (1) and the pre-coating tank (5), and a liquid inlet reflux valve (8) is fixedly connected to the pipe. The pipe fixedly connected to the liquid inlet reflux valve (8) is located above the buffer tank (4).

4. The phosphate rock flotation wastewater pre-coating filter device according to claim 3, characterized in that: The pipeline on which the liquid inlet reflux valve (8) is installed is fixedly connected to a liquid inlet pump (11) via another pipeline, the liquid inlet pump (11) is fixedly connected to a transverse pipe, the transverse pipe is fixedly connected to a liquid inlet valve (9) and a pre-coating liquid inlet pump (7), the liquid inlet reflux valve (8) is arranged on a side close to the automatic backwash surface filter (1), and the liquid inlet valve (9) is arranged above the buffer tank (4).

5. The phosphate rock flotation wastewater pre-coating filter device according to claim 4, characterized in that: A slag discharge pipe (13) is fixedly connected to the bottom of the automatic backwash surface filter (1), a slag discharge valve (12) is fixedly connected to the slag discharge pipe (13), the bottom of the slag discharge pipe (13) is located inside the slag slurry pool (3), the inside of the slag slurry pool (3) is connected to the automatic backwash surface filter (1) through another pipe, and a backwash valve (14) is fixedly connected to the pipe.

6. The phosphate rock flotation wastewater pre-coating filter device according to claim 1, characterized in that: The automatic backwash surface filter (1) is connected to the clear liquid pool (2) via a pipeline, and the bottom of the pipeline is located inside the clear liquid pool (2).

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