CN216236374U - Centrifugal mother liquor advanced treatment digestion device - Google Patents
Centrifugal mother liquor advanced treatment digestion device Download PDFInfo
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- CN216236374U CN216236374U CN202122222356.8U CN202122222356U CN216236374U CN 216236374 U CN216236374 U CN 216236374U CN 202122222356 U CN202122222356 U CN 202122222356U CN 216236374 U CN216236374 U CN 216236374U
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- mother liquor
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- centrifugal mother
- liquid
- buffer tank
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Abstract
The utility model discloses a centrifugal mother liquor advanced treatment digestion device, which comprises a centrifugal mother liquor buffer tank, an air inlet system and a liquid reflux system, wherein the centrifugal mother liquor buffer tank is provided with a liquid inlet pipe; the top of the centrifugal mother liquor buffer tank is connected with a liquid inlet pipe and a tail gas discharge pipe, and the lower end of the liquid inlet pipe extends into the centrifugal mother liquor buffer tank and is connected with a spray head; the air inlet system comprises an air inlet pump, an air inlet pipe and an aeration disc, wherein the tail end of the air inlet pipe penetrates through the top of the centrifugal mother liquid buffer tank and extends to the bottom of the centrifugal mother liquid buffer tank, the aeration disc is connected to the tail end of the air inlet pipe, and the air inlet pump is connected to the head end of the air inlet pipe; the liquid reflux system comprises a liquid discharge pipe, a liquid delivery pump, a reflux pipe and a pump outlet pipe, wherein the head end of the liquid discharge pipe is connected to the bottom of the centrifugal mother liquid buffer tank, the tail end of the reflux pipe is connected to the top of the centrifugal mother liquid buffer tank, the liquid delivery pump is connected between the liquid discharge pipe and the reflux pipe, the pump outlet pipe is connected to the reflux pipe, and the reflux pipe is further connected with a regulating valve.
Description
Technical Field
The utility model belongs to the technical field of chemical production, and particularly relates to a centrifugal mother liquor advanced treatment digestion device.
Background
At present, the advanced treatment and recycling technology of centrifugal mother liquor is continuously and widely applied in the field of wastewater treatment in the polyvinyl chloride industry, the main technology is that ozone and mother liquor water are subjected to oxidation sterilization reaction in a closed container, and then are subjected to multi-medium filtration and ultrafiltration precision filtration, the CODcr of produced water is less than 10mg/L, and desalted water can be further prepared by secondary reverse osmosis and mixed bed treatment. Although CODcr of the mother liquor water after advanced treatment is efficiently degraded, the introduction of ozone also brings new problems to system devices. Ozone is the most oxidizing oxidant in nature and has a solubility in water of 49mg/100ml water (0 ℃). After the ozone oxidation reaction is finished, part of the ozone which does not participate in the reaction is dissolved in the mother liquor water, and if the ozone is not effectively removed, the ozone directly enters an ultrafiltration device, so that great damage is certainly caused to the ultrafiltration membrane, and the service life of the membrane is influenced; the ozone that another part did not participate in the reaction dissipates in reaction unit gas phase space, will along with evacuation pipe, overflow pipe, sample connection, exhaust valve etc. the loss outside the device, not only polluted environment also can cause very big harm to staff's healthy, extravagant energy also increases PVC's manufacturing cost simultaneously.
SUMMERY OF THE UTILITY MODEL
The utility model provides a centrifugal mother liquor advanced treatment digestion device, and aims to solve the technical problems.
Therefore, the utility model adopts the following technical scheme:
a centrifugal mother liquor advanced treatment digestion device comprises a centrifugal mother liquor buffer tank, an air inlet system and a liquid reflux system;
the centrifugal mother liquor buffer tank is of a cylindrical structure with a closed top, the top of the centrifugal mother liquor buffer tank is connected with a liquid inlet pipe and a tail gas discharge pipe, the lower end of the liquid inlet pipe extends into the centrifugal mother liquor buffer tank and is connected with a spray head, the liquid inlet pipe is used for inputting centrifugal mother liquor into the centrifugal mother liquor buffer tank, and the tail gas discharge pipe is used for discharging waste gas in the centrifugal mother liquor buffer tank;
the air inlet system comprises an air inlet pump, an air inlet pipe and an aeration disc, wherein the tail end of the air inlet pipe penetrates through the top of the centrifugal mother liquid buffer tank and extends to the bottom of the centrifugal mother liquid buffer tank, the aeration disc is connected to the tail end of the air inlet pipe, and the air inlet pump is connected to the head end of the air inlet pipe;
the liquid reflux system comprises a liquid discharge pipe, a liquid delivery pump, a reflux pipe and a pump outlet pipe, wherein the head end of the liquid discharge pipe is connected to the bottom of the centrifugal mother liquid buffer tank, the tail end of the reflux pipe is connected to the top of the centrifugal mother liquid buffer tank, the liquid delivery pump is connected between the liquid discharge pipe and the reflux pipe, the pump outlet pipe is connected to the reflux pipe, and the reflux pipe is further connected with a regulating valve.
Further, the bottom of centrifugation mother liquor buffer tank is equipped with the level gauge, and the top of centrifugation mother liquor buffer tank is equipped with waste gas pressure table.
Further, an air inlet pressure gauge is connected to the air inlet pipe.
Furthermore, the air inlet pipe is also connected with an emptying pipe, and the emptying pipe is connected with a valve.
Furthermore, a backflow pressure gauge is connected to the backflow pipe, and the backflow pressure gauge is close to the liquid delivery pump.
Furthermore, a drain port is arranged at the bottom of the centrifugal mother liquor buffer tank.
The design principle and the purpose of each part of the utility model are as follows:
the centrifugal mother liquor buffer tank is designed in a closed manner, so that the situation that unreacted ozone overflows out of the device to cause potential safety hazards and environmental pollution is effectively prevented.
The waste gas manometer is installed additional at centrifugation mother liquor dashpot top, but in time monitoring centrifugation mother liquor dashpot top pressure change, and in time adjusting device inflow and aeration rate proportion make things convenient for the control.
A plurality of nozzles are additionally arranged on the aeration disc, so that the aeration nozzles are fully distributed in the whole centrifugal mother liquor buffer tank part. The air passes through the nozzle and sprays downwards, and the aeration is even, makes air and mother liquor fully contact, adopts this structure can improve the desorption effect of ozone in the mother liquor aquatic, improves the exorbitant speed of ozone. The design of the aeration disc can be specifically determined according to the actual condition of mother liquor water treatment.
An emptying pipe is led out from an air inlet pipe of the air inlet pump, and valves are respectively additionally arranged on the air inlet pipe and the emptying pipe. Can be according to centrifugal mother liquor dashpot top pressure monitoring condition like this, in time adjust the mother liquor dashpot in logical blast volume, when the dashpot top is in the malleation, close the valve of little intake pipe, open big discharge tube valve, ensure that the dashpot is in little negative pressure state, improve the desorption effect of ozone in the mother liquor aquatic.
The liquid reflux system conveys the mother liquor water without ozone in the buffer tank to the next procedure, the reflux amount can be set according to the dissolution amount of ozone in the effluent of the buffer tank, the reflux liquid is continuously circulated, so that the mother liquor water at the bottom and the upper part is fully mixed, the ozone and the organic matters in the mother liquor water continue to react, the ozone content in the device is reduced, and meanwhile, the CODcr index of the mother liquor water is further reduced.
The tail gas discharge pipe can discharge the tail gas in the gas phase space at the top of the buffer tank to the degassing tower, and the overflow speed of ozone in the mother liquor water is increased while the pressure at the top of the tank is reduced.
According to the utility model, the tail gas digestion device is developed on the basis of the polyvinyl chloride centrifugal mother liquid advanced treatment process, and the tail gas digestion device is used for removing the ozone which is a factor polluting the environment and is remained in the centrifugal mother liquid advanced treatment device, so that the aims of reducing the ozone content in the mother liquid water, reasonably recovering the tail gas in the advanced treatment device and reducing the environmental pollution are fulfilled. Meanwhile, the centrifugal mother liquor deep treatment device has the advantages of reasonable structure, convenience in operation, small occupied area and the like, and can be widely applied to the centrifugal mother liquor deep treatment in the process of producing polyvinyl chloride by the calcium carbide method.
Drawings
FIG. 1 is a schematic diagram of the operation of the system of the present invention;
in the figure: 1-air inlet pump, 2-emptying pipe, 3-air inlet pressure gauge, 4-liquid inlet pipe, 5-air inlet pipe, 6-spray head, 7-centrifugal mother liquor buffer tank, 8-liquid level meter, 9-aeration disc, 10-nozzle, 11-drain port, 12-liquid discharge pipe, 13-tail gas discharge pipe, 14-regulating valve, 15-reflux pipe, 16-pump outlet pipe, 17-reflux pressure gauge, 18-liquid delivery pump and 19-waste gas pressure gauge.
Detailed Description
The utility model will be further described with reference to the accompanying drawings in which:
as shown in figure 1, the centrifugal mother liquor advanced treatment digestion device comprises a centrifugal mother liquor buffer tank 7, an air inlet system and a liquid reflux system.
Centrifugal mother liquor dashpot 7 is top confined cylinder structure, and the top of centrifugal mother liquor dashpot 7 is connected with feed liquor pipe 4 and tail gas discharge pipe 13, and the lower extreme of feed liquor pipe 4 extends to in the centrifugal mother liquor dashpot 7 and is connected with shower head 6, and feed liquor pipe 4 is used for to 7 input centrifugal mother liquor of centrifugal mother liquor dashpot, and tail gas discharge pipe 13 is used for discharging the waste gas in the centrifugal mother liquor dashpot 7. The bottom of the centrifugal mother liquor buffer tank 7 is provided with a drain port 11, and the drain port 11 is used for discharging liquid in the centrifugal mother liquor buffer tank 7 when the machine is stopped. The bottom of centrifugation mother liquor dashpot 7 is equipped with level gauge 8, and the top of centrifugation mother liquor dashpot 7 is equipped with exhaust gas pressure table 19, and level gauge 8 is used for monitoring the liquid level height of centrifugation mother liquor dashpot 7, and exhaust gas pressure table 19 is used for monitoring the gas pressure value in the centrifugation mother liquor dashpot 7.
Air intake system includes air intake pump 1, intake pipe 5 and aeration dish 9, and the tail end of intake pipe 5 penetrates and extends to 7 bottoms in centrifugal mother liquor buffer tank by 7 tops in centrifugal mother liquor buffer tank, and aeration dish 9 is connected on the tail end of intake pipe 5, is equipped with a plurality of nozzles 10 on the aeration dish 9. The air inlet pump 1 is connected to the head end of an air inlet pipe 5, an emptying pipe 2 is further connected to the air inlet pipe 5, a valve is connected to the emptying pipe 2, and an air inlet pressure gauge 3 is connected to the air inlet pipe 5.
The liquid reflux system comprises a liquid discharge pipe 12, a liquid delivery pump 18, a reflux pipe 15 and a pump outlet pipe 16, wherein the head end of the liquid discharge pipe 12 is connected to the bottom of the centrifugal mother liquid buffer tank 7, the tail end of the reflux pipe 15 is connected to the top of the centrifugal mother liquid buffer tank 7, the liquid delivery pump 18 is connected between the liquid discharge pipe 12 and the reflux pipe 15, the pump outlet pipe 16 is connected to the reflux pipe 15, and the reflux pipe 15 is further connected with a regulating valve 14. The return pipe 15 is connected with a return pressure gauge 17, and the return pressure gauge 17 is close to a liquid delivery pump 18.
The working principle of the utility model is as follows:
mother liquor water from biochemical treatment enters an ozone reaction device to carry out oxidation reaction, the mother liquor water after reaction overflows to a centrifugal mother liquor buffer tank 7, air is introduced into the bottom of the buffer tank to carry out aeration simultaneously, ozone dissolved in the mother liquor water is separated out, the mother liquor water after ozone removal is pumped to ultrafiltration and secondary reverse osmosis filtration through a delivery pump, anions and cations are removed through a mixed bed, desalted water meeting the use standard of polymerization is finally prepared, the tail gas removed in the buffer tank enters a degassing tower through a tail gas discharge pipe 13, then ozone is decomposed into oxygen through an ozone destructor, the ozone concentration of the tail gas after decomposition is less than 0.08ppm, and finally the tail gas up to the standard is discharged into the air.
It should be noted that the above are only some embodiments of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (7)
1. The centrifugal mother liquor advanced treatment digestion device is characterized by comprising a centrifugal mother liquor buffer tank (7), an air inlet system and a liquid reflux system;
the centrifugal mother liquor buffer tank (7) is of a cylindrical structure with a closed top, the top of the centrifugal mother liquor buffer tank (7) is connected with a liquid inlet pipe (4) and a tail gas discharge pipe (13), the lower end of the liquid inlet pipe (4) extends into the centrifugal mother liquor buffer tank (7) and is connected with a spray header (6), the liquid inlet pipe (4) is used for inputting centrifugal mother liquor into the centrifugal mother liquor buffer tank (7), and the tail gas discharge pipe (13) is used for discharging waste gas in the centrifugal mother liquor buffer tank (7);
the air inlet system comprises an air inlet pump (1), an air inlet pipe (5) and an aeration disc (9), wherein the tail end of the air inlet pipe (5) penetrates through the top of the centrifugal mother liquor buffer tank (7) and extends to the bottom of the centrifugal mother liquor buffer tank (7), the aeration disc (9) is connected to the tail end of the air inlet pipe (5), and the air inlet pump (1) is connected to the head end of the air inlet pipe (5);
the liquid reflux system comprises a liquid discharge pipe (12), a liquid delivery pump (18), a reflux pipe (15) and a pump outlet pipe (16), wherein the head end of the liquid discharge pipe (12) is connected to the bottom of the centrifugal mother liquid buffer tank (7), the tail end of the reflux pipe (15) is connected to the top of the centrifugal mother liquid buffer tank (7), the liquid delivery pump (18) is connected between the liquid discharge pipe (12) and the reflux pipe (15), the pump outlet pipe (16) is connected to the reflux pipe (15), and the reflux pipe (15) is further connected with a regulating valve (14).
2. The advanced treatment digestion device for centrifugal mother liquor according to claim 1, characterized in that a liquid level meter (8) is arranged at the bottom of the centrifugal mother liquor buffer tank (7), and an exhaust gas pressure gauge (19) is arranged at the top of the centrifugal mother liquor buffer tank (7).
3. The centrifugal mother liquor advanced treatment digestion apparatus according to claim 1, characterized in that an air inlet pressure gauge (3) is connected to the air inlet pipe (5).
4. The centrifugal mother liquor advanced treatment digestion device according to the claim 3, characterized in that the air inlet pipe (5) is further connected with an emptying pipe (2), and the emptying pipe (2) is connected with a valve.
5. The centrifugal mother liquor advanced treatment digestion apparatus according to the claim 1, characterized in that a reflux pressure gauge (17) is connected to the reflux pipe (15), and the reflux pressure gauge (17) is close to the liquid delivery pump (18).
6. The advanced treatment digestion apparatus for centrifugal mother liquor according to claim 1, characterized in that the bottom of the centrifugal mother liquor buffer tank (7) is provided with a drain port (11).
7. The centrifugal mother liquor advanced treatment digestion apparatus according to the claim 1, characterized in that a plurality of nozzles (10) are arranged on the aeration disc (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122222356.8U CN216236374U (en) | 2021-09-14 | 2021-09-14 | Centrifugal mother liquor advanced treatment digestion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122222356.8U CN216236374U (en) | 2021-09-14 | 2021-09-14 | Centrifugal mother liquor advanced treatment digestion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216236374U true CN216236374U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122222356.8U Active CN216236374U (en) | 2021-09-14 | 2021-09-14 | Centrifugal mother liquor advanced treatment digestion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216236374U (en) |
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2021
- 2021-09-14 CN CN202122222356.8U patent/CN216236374U/en active Active
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