CN213738621U - Phosphoric acid washing system - Google Patents
Phosphoric acid washing system Download PDFInfo
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- CN213738621U CN213738621U CN202021760743.6U CN202021760743U CN213738621U CN 213738621 U CN213738621 U CN 213738621U CN 202021760743 U CN202021760743 U CN 202021760743U CN 213738621 U CN213738621 U CN 213738621U
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Abstract
The utility model relates to a phosphoric acid washing system, two of the carousel filter among the phosphoric acid washing system wash the filtrating as one wash the washing liquid in district, and one washes the filtrating in district and returns to the phosphoric acid reaction tank again. And taking hot water in a hot water tank as washing liquid for three-stage water washing, and taking filtrate in a three-washing area as filter cloth washing liquid. The concentration of the phosphoric acid in the first washing filtrate is higher, so that the concentration of the phosphoric acid in the phosphoric acid reaction tank is not greatly reduced. And hot water in the hot water tank is used as washing liquid for the third-stage washing, and filtrate obtained by the third-stage washing is input into the filter cloth washing water settling tank, so that the filtrate obtained by the third-stage washing is fully used, and the phosphoric acid washing rate is ensured. The phosphoric acid washing rate of the utility model can reach more than 97 percent.
Description
Technical Field
The utility model relates to a washing system especially relates to a phosphoric acid washing system.
Background
Phosphoric acid is a widely used chemical raw material, a wet-process phosphoric acid production process is generally adopted in industry, and a filter is a core device in the wet-process phosphoric acid production process and plays roles in filtering slurry and washing a filter cake. The filter is provided with a filtering area and a washing area, the washing area is generally divided into a first-stage washing area, a second-stage washing area and a third-stage washing area, each washing area is connected with a washing pipe, the washing pipes are connected with washing pumps, filter cakes on washing liquid washing are pumped into the washing pipes through the washing pumps, and filter liquor generated by washing the filter cakes in each washing area flows out of respective filter liquor pipe.
In the prior art, a countercurrent washing system is generally adopted for washing, namely filtrate obtained by three-stage washing is used as washing liquid of second-stage washing, filtrate obtained by the second-stage washing is used as washing liquid of the first-stage washing, and finally the filtrate obtained by the first-stage washing is collected into a phosphoric acid ageing tank or a reaction tank. However, as the grade of the phosphate ore decreases, the water consumption of the tertiary water washing is required to be increased in order to increase the phosphoric acid washing rate, so that the concentration of the phosphoric acid collected in the phosphoric acid aging tank or the reaction tank is too low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to at least one technical problem who exists among the prior art, provide a phosphoric acid washing system, this system only collects second grade washing and one-level washing filtrating to the phosphoric acid reaction tank, collects the filter cloth washing water subsider with tertiary washing, has both solved and has collected the too low problem of phosphoric acid concentration in phosphoric acid ageing groove or the reaction, has improved the phosphoric acid washing rate again.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a phosphoric acid washing system comprises a phosphoric acid reaction tank, a phosphoric acid return pump connected with the phosphoric acid reaction tank and a filter, wherein the filter is provided with a first washing area, a second washing area and a third washing area, and the first washing area, the second washing area and the third washing area are respectively provided with a corresponding first washing water pipe, a corresponding second washing water pipe and a corresponding third washing water pipe; a first washing pump, a second washing pump and a third washing pump; a first filtrate washing pipe, a second filtrate washing pipe and a third filtrate washing pipe; washing liquid is input into the corresponding washing water pipe corresponding to the washing pump, and filtrate flows out of the corresponding filtrate pipe; the second washing area is also provided with a hot water tank, the third washing area is provided with a filter cloth washing water settling tank, the inlet of the second washing pump is communicated with the hot water tank, and the outlet of the second washing pump is communicated with a washing water pipe of the second washing area; the inlet of the first washing pump is communicated with the outlet of the second washing filtrate, the outlet of the first washing pump is communicated with the washing water pipe of the first washing area, the outlet of the first washing filtrate is connected with the inlet of the phosphoric acid returning pump, and the first washing filtrate is input into the phosphoric acid reaction tank; the inlet of the three washing pumps is communicated with the hot water tank, the outlet of the three washing pumps is communicated with the three washing water pipes, and the outlet of the three washing filtrate is connected with the filter cloth washing water settling tank.
The beneficial effect of adopting the further scheme is that: and (3) taking the second washing filtrate as a washing liquid of the first washing area, and only collecting the first washing filtrate to the phosphoric acid reaction tank, wherein the phosphoric acid concentration in the first washing filtrate is higher, so that the phosphoric acid concentration in the phosphoric acid reaction tank cannot be greatly reduced. The hot water in the hot water tank is used as the washing liquid of the third-stage washing, and the filtrate obtained by the third-stage washing is input into the filter cloth washing water settling tank, so that the filtrate of the third-stage washing is fully adapted, waste is avoided, and the phosphoric acid washing rate is ensured. The phosphoric acid washing rate of the utility model can reach more than 97 percent.
Further, the filter is a rotary disc filter.
The rotary disc filter has better filtering and washing effects.
Furthermore, a cleaning liquid tank is arranged between the three washing area washing water pipes and the hot water tank, and an inlet of the three washing pumps is communicated with the cleaning liquid tank.
Because the washing liquid in the second washing area and the washing liquid in the third washing area are both sourced from the hot water tank, when the instantaneous consumption of the washing liquid in the two washing areas is too large, the water yield of the hot water tank is possibly insufficient, and the washing rate of the phosphoric acid cannot meet the requirement. After the cleaning liquid tank is added, sufficient cleaning liquid can be stored in the cleaning liquid tank, the supply amount of the cleaning liquid is ensured, the cleaning rate of phosphoric acid can be improved by about 2 percent, and the cost can be saved by about 80 ten thousand yuan per year.
Furthermore, a flowmeter and a valve are arranged on the cleaning liquid tank.
And adjusting the flow rate of the three-washing water in real time according to the opening and closing degree of the three-washing water flow control valve in real time measured by the flowmeter.
Furthermore, a gypsum flushing tank communicated with the hot water tank is also arranged in the second washing area, and an inlet of the second washing pump is communicated with the gypsum flushing tank.
The gypsum flushing tank has the similar function as the cleaning liquid tank, and can also stabilize the supply amount of the cleaning liquid in the two washing areas.
And further, a filter cloth washing water tank is also arranged in the three washing areas and is communicated with the filter cloth washing water settling tank.
And (4) inputting the filtrate in the three washing areas into a filter cloth washing water settling tank, and enabling clear liquid overflowing from the filter cloth washing water settling tank to flow into a filter cloth washing water tank for cleaning the filter cloth.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below: 1 a washing area, 1-1 a washing pump, 2 a washing area, 2-1 a washing pump, 3 a washing area, 3-1 a washing pump, 4 a hot water tank, 5 a gypsum flushing tank, 6 a cleaning liquid tank, 7 a filter cloth washing water settling tank, 8 a filter cloth washing water tank, 9 a phosphoric acid reaction tank and 10 a phosphoric acid recycling pump.
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.
Fig. 1 is a schematic structural diagram of a phosphoric acid washing system of the present invention, and it can be seen from the diagram that the washing system includes a phosphoric acid reaction tank 9, a phosphoric acid return pump 10 connected to the phosphoric acid reaction tank 9, and a filter, wherein the filter is provided with a first washing zone 1, a second washing zone 2, and a third washing zone 3, and the first washing zone 1, the second washing zone 2, and the third washing zone 3 are respectively provided with a corresponding first washing water pipe, a corresponding second washing water pipe, and a corresponding third washing water pipe; a first washing pump 1-1, a second washing pump 2-1 and a third washing pump 3-1; a first filtrate washing pipe, a second filtrate washing pipe and a third filtrate washing pipe. The washing pump is used for inputting washing liquid to the corresponding washing pipe, the generated filtrate flows out from the corresponding filtering pipe, namely a washing pump 1-1 is connected with a washing water pipe of a washing area, a washing pump 1-1 is used for inputting the washing liquid of the washing area 1 into the washing area through the washing water pipe, and the washed filtrate flows out through a washing filtering pipe. Similarly, the second washing pump 2-1 is connected with the second washing water pipe of the second washing area, the second washing pump 2-1 inputs the washing liquid of the second washing area 2 into the second washing area 2 through the second washing water pipe, and the washed second washing liquid flows out through the second washing liquid pipe; the three-washing pump 3-1 is connected with the three-washing water pipe of the three-washing area 3, the three-washing pump 3-1 inputs the washing liquid of the three-washing area 3 into the three-washing area through the three-washing water pipe, and the washed three-washing filtrate flows out through the three-washing filtrate pipe. The filter is preferably a rotary disc filter which is a commercial commodity, and the specific structures and the connection modes of the washing pipe, the rotary disc, the washing area and the filtrate pipe are not repeated.
In the utility model, a hot water tank 4 is arranged in the second washing area 2, a filter cloth washing water settling tank 7 is arranged in the third washing area 3, the inlet of the second washing pump 2-1 is communicated with the hot water tank 4, and the outlet is communicated with a washing water pipe of the second washing area; the inlet of the first washing pump 1-1 is communicated with the outlet of the second washing filtrate, the outlet of the first washing pump is communicated with the washing water pipe of the first washing area, the outlet of the first washing filtrate is connected with the inlet of the back phosphoric acid pump 10, and the first washing filtrate is input into the phosphoric acid reaction tank 9; the inlet of the three-washing pump 3-1 is communicated with the hot water tank 4, the outlet of the three-washing pump is communicated with the three-washing water pipe, and the outlet of the three-washing filtrate is connected with the filter cloth washing water settling tank 7. In order to stabilize the flow of the washing liquid in the second washing area 2 and the third washing area 3, a gypsum washing tank 5 is arranged between the hot water tank 4 and the second washing pump 2-1, and a washing liquid tank 6 is arranged between the hot water tank 4 and the third washing pump 3-1. Hot water is pumped into the triple washing area 3 from the hot water tank 4 through the triple washing pump 3-1 for washing, generated triple washing filtrate flows out through the triple washing filtrate pipe and flows into the filter cloth washing water settling tank 7 for settling, supernatant in the filter cloth washing water settling tank 7 flows into the filter cloth washing water tank 8, and solution in the filter cloth washing water tank 8 is used for cleaning filter cloth.
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. A phosphoric acid washing system comprises a phosphoric acid reaction tank, a phosphoric acid return pump connected with the phosphoric acid reaction tank and a filter, wherein the filter is provided with a first washing area, a second washing area and a third washing area, and the first washing area, the second washing area and the third washing area are respectively provided with a corresponding first washing water pipe, a corresponding second washing water pipe and a corresponding third washing water pipe; a first washing pump, a second washing pump and a third washing pump; a first filtrate washing pipe, a second filtrate washing pipe and a third filtrate washing pipe; washing liquid is input into the corresponding washing water pipe corresponding to the washing pump, and generated filtrate flows out of the corresponding filtrate pipe; the device is characterized in that a hot water tank is also arranged in the second washing area, a filter cloth washing water settling tank is arranged in the third washing area, the inlet of the second washing pump is communicated with the hot water tank, and the outlet of the second washing pump is communicated with a washing water pipe of the second washing area; the inlet of the first washing pump is communicated with the outlet of the second washing filtrate, the outlet of the first washing pump is communicated with the washing water pipe of the first washing area, and the outlet of the first washing filtrate is connected with the inlet of the phosphoric acid returning pump and inputs the filtrate into the phosphoric acid reaction tank; the inlet of the three washing pumps is communicated with the hot water tank, the outlet of the three washing pumps is communicated with the three washing water pipes, and the outlet of the three washing filtrate is connected with the filter cloth washing water settling tank.
2. The phosphoric acid scrubbing system of claim 1, wherein the filter is a rotary disc filter.
3. The phosphoric acid scrubbing system of claim 1, wherein a cleaning liquid tank is disposed between said triple-wash pump and said hot water tank, and wherein said triple-wash pump inlet is in communication with said cleaning liquid tank.
4. The phosphoric acid scrubbing system of claim 3, wherein a flow meter and a valve are disposed on the cleaning fluid tank.
5. The phosphoric acid washing system of claim 1, wherein a gypsum flushing tank is further arranged between the secondary washing pump and the hot water tank, and the inlet of the secondary washing pump is communicated with the gypsum flushing tank.
6. The phosphoric acid washing system according to claim 1, wherein a filter cloth washing water tank is further provided in the triple washing zone, and the filter cloth washing water tank is communicated with the filter cloth washing water settling tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021760743.6U CN213738621U (en) | 2020-08-21 | 2020-08-21 | Phosphoric acid washing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021760743.6U CN213738621U (en) | 2020-08-21 | 2020-08-21 | Phosphoric acid washing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213738621U true CN213738621U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021760743.6U Active CN213738621U (en) | 2020-08-21 | 2020-08-21 | Phosphoric acid washing system |
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| CN (1) | CN213738621U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115557719A (en) * | 2022-08-16 | 2023-01-03 | 湖北祥云(集团)化工股份有限公司 | Comprehensive treatment method of phosphogypsum |
-
2020
- 2020-08-21 CN CN202021760743.6U patent/CN213738621U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115557719A (en) * | 2022-08-16 | 2023-01-03 | 湖北祥云(集团)化工股份有限公司 | Comprehensive treatment method of phosphogypsum |
| CN115557719B (en) * | 2022-08-16 | 2023-08-15 | 湖北祥云(集团)化工股份有限公司 | Comprehensive treatment method of phosphogypsum |
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