CN116143090A - Constant-pressure filtration treatment method and treatment device for phosphorus mud - Google Patents
Constant-pressure filtration treatment method and treatment device for phosphorus mud Download PDFInfo
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- CN116143090A CN116143090A CN202310408144.XA CN202310408144A CN116143090A CN 116143090 A CN116143090 A CN 116143090A CN 202310408144 A CN202310408144 A CN 202310408144A CN 116143090 A CN116143090 A CN 116143090A
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- phosphorus
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- sludge
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- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 68
- 239000011574 phosphorus Substances 0.000 title claims abstract description 68
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000011085 pressure filtration Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000010802 sludge Substances 0.000 claims abstract description 35
- 239000002893 slag Substances 0.000 claims abstract description 31
- 239000010865 sewage Substances 0.000 claims abstract description 28
- 208000028659 discharge Diseases 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000004062 sedimentation Methods 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 238000005086 pumping Methods 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 70
- 229910052757 nitrogen Inorganic materials 0.000 claims description 35
- 238000007664 blowing Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 abstract description 7
- 239000008213 purified water Substances 0.000 abstract description 6
- 239000007921 spray Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002269 spontaneous effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/04—Purification of phosphorus
- C01B25/047—Purification of phosphorus of yellow phosphorus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of sludge phosphorus treatment, and discloses a sludge phosphorus constant-pressure filtration treatment method and a sludge phosphorus constant-pressure filtration treatment device, wherein the sludge phosphorus constant-pressure filtration treatment method comprises the following steps: pumping the mud and water mixture in the sewage pool into a sewage buffer tank by using a mud pump; conveying the mud and water mixture into a mud-phosphorus filter by a conveying pump for constant-pressure filtration, and carrying out slag discharge treatment after filtration; the filtered clear liquid enters a yellow phosphorus collecting tank for sedimentation separation, and liquid yellow phosphorus settled at the bottom of the tank is discharged and collected; overflowing the settled clean water to a clean water tank, and recycling the clean water by a circulating pump. The recycling efficiency of the phosphorus mud is obviously improved; the solid content of the purified water is less than 100mg/L, and the purified water is circularly sprayed for use, so that the blockage problems of pipelines, spray heads and the like of a spraying system are effectively solved; the purified water is circulated in a washing tower, the washing efficiency is obviously improved, and the yellow phosphorus yield is obviously improved.
Description
Technical Field
The invention belongs to the technical field of sludge phosphorus treatment, and particularly relates to a sludge phosphorus constant-pressure filtration treatment method and a sludge phosphorus constant-pressure filtration treatment device.
Background
At present, about 10% of yellow phosphorus is discharged outwards as industrial waste in the industrialized production of yellow phosphorus, about 30% of yellow phosphorus is contained in the yellow phosphorus, spontaneous combustion can be generated when air is encountered, not only is resource waste caused, but also the environment is polluted, and the yellow phosphorus has long been a great difficulty in yellow phosphorus production.
At present, in the yellow phosphorus production process in China, a multistage water washing method is mainly adopted for yellow phosphorus collection, gaseous yellow phosphorus can be cooled and collected in the spray tower washing process, and a large amount of dust in the yellow phosphorus furnace gas is washed into circulating water. At present, the circulating water is purified and is settled through a sewage tank, the settling efficiency is low, so that the water quality of the circulating water is poor, the system is easy to be blocked, scaled and the like, and meanwhile, the washing efficiency is low because the circulating water quality is poor.
The common sludge phosphorus treatment technology at present is as follows:
gravity method: mainly uses a centrifugal machine, and separates phosphorus from the sludge phosphorus by the action of centrifugal force. The method has the defects that the centrifuge is frequently overhauled;
distillation method: the method has the advantages that the yellow phosphorus is sublimated by heating the sludge phosphorus to more than 330 ℃ mainly through hot steam and then is cooled and collected, the energy consumption is high, the treatment capacity is small, and meanwhile, the potential safety hazard is more;
plate and frame filtration method: and (3) using a plate-and-frame filter press to filter-press the sludge phosphorus. The filter bags used in the device are made of combustible fiber materials, so that the method has the risk of spontaneous combustion. And cannot stably operate for a long period.
Through the above analysis, the problems and defects existing in the prior art are as follows: the existing sludge phosphorus treatment method needs to carry out frequent maintenance on the device, has high energy consumption and small treatment capacity, has more potential safety hazards and has spontaneous combustion risk; and cannot stably operate for a long period.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a constant-pressure filtration treatment method and a constant-pressure filtration treatment device for phosphorus mud.
The invention discloses a constant-pressure filtration treatment method for sludge phosphorus, which comprises the following steps:
firstly, performing constant-pressure filtration and slag discharge treatment on a mud-water mixture in a sewage tank by using a mud-phosphorus filter;
secondly, settling separation is carried out in a yellow phosphorus collecting tank, and liquid yellow phosphorus is collected and clear water is recycled respectively.
Further, the constant-pressure filtration treatment method for the phosphorus mud comprises the following steps:
step one, pumping a mud and water mixture in a sewage pool into a sewage buffer tank by using a mud pump; conveying the mud and water mixture into a mud-phosphorus filter by a conveying pump for constant-pressure filtration, and carrying out slag discharge treatment after filtration;
step two, the filtered clear liquid enters a yellow phosphorus collecting tank to carry out sedimentation separation, and the liquid yellow phosphorus settled at the bottom of the tank is discharged and collected; overflowing the settled clean water to a clean water tank, and recycling the clean water by a circulating pump.
Further, the constant pressure filtration includes:
when the pressure reaches a set value, the opening and closing degree of a return orifice valve of the pump is regulated, and when the filtering time reaches the set time, the equipment is stopped for slag discharge treatment.
Further, the filtration pressure is constant during the constant pressure filtration.
Further, the constant pressure filtration temperature is greater than 80 ℃.
Further, the deslagging treatment includes:
1) When the constant pressure filtration of the filter reaches the set time, the filter discharge outlet and the nitrogen inlet are opened, sewage in the equipment is discharged, and the discharge outlet is closed;
2) Opening a slag discharge port, closing a valve of a nitrogen back-blowing pipe, closing a top valve of a yellow phosphorus collecting tank, and carrying out pulse back-blowing on equipment to enable lean phosphorus mud on a filter element to fall off and enter a slag receiving tank;
3) And after the slag discharge is finished, closing the slag discharge port, the nitrogen inlet and the valves of the nitrogen back-blowing pipe.
Another object of the present invention is to provide a constant pressure filtration treatment apparatus for sludge phosphorus for implementing the constant pressure filtration treatment method for sludge phosphorus, the constant pressure filtration treatment apparatus for sludge phosphorus comprising:
a nitrogen production system;
one end of the nitrogen making system is provided with an interface for introducing air; the other end of the nitrogen production system is connected with a nitrogen storage tank;
the nitrogen storage tank is connected with the phosphorus mud filter through a nitrogen back-flushing pipe;
one side of the sludge phosphorus filter is connected with the yellow phosphorus collecting tank through a water outlet pipe; the yellow phosphorus collecting tank is connected with the clean water tank through an overflow pipe.
Further, the nitrogen production system is provided with: air compressor machine and PSA nitrogen generation unit.
Further, the other side of the sludge phosphorus filter is connected with a sewage buffer tank; the sewage buffer tank is connected with the sewage pool.
Further, the sludge phosphorus filter is provided with: clear water pipe, heat tracing steam inlet, outlet pipe, heat tracing steam outlet, inlet tube, connect slag pot, balance pipe and blast pipe.
Aiming at the technical problems in the prior art and the difficulty in solving the problems, the technical problems solved by the technical proposal of the invention and the results, data and the like in the research and development process are closely combined, and the technical problems solved by the technical proposal of the invention are analyzed in detail and deeply, and some technical effects brought after the problems are solved are creative. The specific description is as follows:
from the aspect of production technology: according to the invention, the poor sludge phosphorus deposited in the circulating sewage pool is subjected to dry slag treatment, so that the problem that the sedimentation effect is poor due to the reduction of the sedimentation space of the sedimentation pool caused by long-term accumulation of the sludge phosphorus in the sedimentation pool is avoided; the dry slag treatment is carried out on lean phosphorus mud, the water content is low, and the recycling efficiency of the phosphorus mud is obviously improved; the solid content of the purified water is less than 100mg/L, and the purified water is circularly sprayed for use, so that the blockage problems of pipelines, spray heads and the like of a spraying system are effectively solved; the purified water is circulated in a washing tower, the washing efficiency is obviously improved, and the yellow phosphorus yield is obviously improved.
From the aspect of economic benefit: according to the invention, the mud and water mixture in the sewage pool is separated and purified, the lean mud and phosphorus is subjected to dry slag treatment, the subsequent treatment efficiency is improved, and the production cost is obviously reduced; the liquid yellow phosphorus in the pool and the filtered clear liquid pass through the filter material together, and after the liquid yellow phosphorus is settled in the yellow phosphorus collecting tank, the elemental phosphorus with the purity of more than 95% can be recovered, so that direct economic benefit can be generated; low energy consumption and long-period stable operation.
From the aspect of safety and environmental protection: the treatment process is in a fully-closed state, so that natural or fuming of the sludge phosphorus in the air is avoided, and the environment is polluted; the slag discharge back blowing and slag receiving process of the equipment is protected by nitrogen, and the sludge phosphorus has no natural risk.
Drawings
Fig. 1 is a schematic diagram of a constant-pressure filtration treatment method for phosphorus mud provided by the embodiment of the invention.
Fig. 2 is a flow chart of a constant-pressure filtration treatment method for phosphorus mud provided by the embodiment of the invention.
Fig. 3 is a schematic structural diagram of a sludge phosphorus filter according to an embodiment of the present invention.
In the figure: 1. a nitrogen production system; 2. a nitrogen storage tank; 3. a mud phosphorus filter; 4. a sewage pool; 5. a sewage buffer tank; 6. a slag receiving tank; 7. yellow phosphorus collecting tank; 8. a clean water tank; 9. a water inlet; 10. a water outlet; 11. a balancing port; 12. an exhaust nozzle; 13. a nitrogen inlet; 14. a clear water inlet; 15. a heat tracing steam inlet; 16. a drainage assisting port; 17. a slag discharge port; 18. a purge port; 19: a heat tracing steam outlet, 20 and a nitrogen back-blowing pipe; 21. an exhaust pipe; 22. a return pipe; 23. and (3) an overflow pipe.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1-2, the constant-pressure filtration treatment method for the phosphorus mud provided by the embodiment of the invention comprises the following steps:
s101, pumping a mud and water mixture in the sewage tank 4 into a sewage buffer tank 5 by using a mud pump; conveying the mud and water mixture into a mud-phosphorus filter 3 by a conveying pump for constant-pressure filtration, and carrying out slag discharge treatment after filtration;
s102, allowing filtered clear liquid to enter a yellow phosphorus collecting tank 7 for sedimentation separation, and discharging and collecting liquid yellow phosphorus settled at the bottom of the tank; and overflowing the settled clean water to a clean water tank 8, and recycling the clean water through a circulating pump.
The constant-pressure filtration treatment method for the phosphorus mud provided by the embodiment of the invention comprises the following steps:
1) Pumping a mud-water mixture (hereinafter referred to as sewage) in the sewage tank 4 into a sewage buffer tank 5 by a mud pump;
2) The sewage is sent to a phosphorus mud filter 3 by a delivery pump for constant pressure filtration, when the pressure reaches a set value, the constant filtration pressure is ensured by adjusting the opening and closing degree of a return port valve of the pump, and after the filtration time reaches the set time, the equipment is stopped for slag discharge operation;
3) The filtered clear liquid enters a yellow phosphorus collecting tank 7 for sedimentation separation, liquid yellow phosphorus is settled at the bottom of the tank, and is discharged and collected at regular time;
4) The settled clean water overflows to a clean water tank 8 and is recycled by a circulating pump.
The deslagging provided by the embodiment of the invention comprises the following steps:
1) When the constant pressure filtration of the filter reaches the set time, the equipment needs to carry out slag discharging operation;
2) Firstly, a filter discharge port 18 and a nitrogen inlet 13 are opened, sewage in the equipment is discharged, and the discharge port 18 is closed;
3) Opening a slag discharge port 17, closing a valve of a nitrogen back-blowing pipe, closing a top valve of the yellow phosphorus collecting tank 7, carrying out pulse back-blowing on equipment to enable lean sludge phosphorus on a filter element to fall off and enter a slag receiving tank;
4) After the slag discharge is finished, the valves of the slag discharge port 17, the nitrogen inlet 13 and the nitrogen back-blowing pipe 20 are closed.
The yellow phosphorus collection method provided by the embodiment of the invention comprises the following steps: constant pressure filtration is carried out at a temperature above 80 ℃, at which yellow phosphorus is in a liquid state, and can directly pass through the filter material together with the filtered liquid, enter the yellow phosphorus collecting tank 7, and the yellow phosphorus is deposited at the tank bottom through gravity sedimentation effect and is removed at fixed time according to actual conditions.
As shown in fig. 3, the constant-pressure filtration treatment device for phosphorus mud provided by the embodiment of the invention includes:
nitrogen making system 1, nitrogen storage tank 2, mud phosphorus filter 3, effluent water sump 4, sewage buffer tank 5, connect slag pot 6, yellow phosphorus collecting vat 7, clean water basin 8.
In order to prove the inventive and technical value of the technical solution of the present invention, this section is an application example of the technical solution on a specific product or on a related technology.
The constant-pressure filtration treatment method for the phosphorus mud provided by the embodiment of the invention is applied to the phosphorus mud treatment in the yellow phosphorus industrial production process, can utilize waste, improves economic benefit and avoids environmental pollution.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (9)
1. The constant-pressure filtration treatment method for the sludge phosphorus is characterized by comprising the following steps of:
step one, pumping a mud and water mixture in a sewage pool into a sewage buffer tank by using a mud pump; conveying the mud and water mixture into a mud-phosphorus filter by a conveying pump for constant-pressure filtration, and carrying out slag discharge treatment after filtration;
step two, the filtered clear liquid enters a yellow phosphorus collecting tank to carry out sedimentation separation, and the liquid yellow phosphorus settled at the bottom of the tank is discharged and collected; overflowing the settled clean water to a clean water tank, and recycling the clean water by a circulating pump;
the deslagging treatment comprises the following steps:
1) When the constant pressure filtration of the filter reaches the set time, the filter discharge outlet and the nitrogen inlet are opened, sewage in the equipment is discharged, and the discharge outlet is closed;
2) Opening a slag discharge port, closing a valve of a nitrogen back-blowing pipe, and closing a top valve of the yellow phosphorus collecting tank;
3) And after the slag discharge is finished, closing the slag discharge port, the nitrogen inlet and the valves of the nitrogen back-blowing pipe.
2. The constant pressure filtration treatment method of phosphorus mud according to claim 1, wherein the constant pressure filtration comprises:
when the pressure reaches a set value, the opening and closing degree of a return orifice valve of the pump is regulated, and when the filtering time reaches the set time, the equipment is stopped for slag discharge treatment.
3. The constant pressure filtration treatment method of phosphorus mud according to claim 1, wherein the filtration pressure is constant during the constant pressure filtration.
4. The constant pressure filtration treatment method of phosphorus mud according to claim 1, wherein the constant pressure filtration temperature is more than 80 ℃.
5. The constant pressure filtration treatment method of the sludge phosphorus as claimed in claim 1, wherein a top valve of the yellow phosphorus collecting tank is closed, pulse back blowing is carried out on the equipment, and the lean sludge phosphorus on the filter element is fallen into the slag receiving tank.
6. A constant pressure filtration treatment device for sludge phosphorus for implementing the constant pressure filtration treatment method for sludge phosphorus as claimed in any one of claims 1 to 5, characterized in that the constant pressure filtration treatment device for sludge phosphorus is provided with:
a nitrogen production system;
one end of the nitrogen making system is provided with an interface for introducing air; the other end of the nitrogen production system is connected with a nitrogen storage tank;
the nitrogen storage tank is connected with the phosphorus mud filter through a nitrogen back-flushing pipe;
one side of the sludge phosphorus filter is connected with the yellow phosphorus collecting tank through a water outlet pipe; the yellow phosphorus collecting tank is connected with the clean water tank through an overflow pipe.
7. The constant pressure filtration treatment device for phosphorus sludge as claimed in claim 6, wherein said nitrogen generation system is provided with: air compressor machine and PSA nitrogen generation unit.
8. The constant pressure filtration treatment device for sludge phosphorus as claimed in claim 6, wherein the other side of the sludge phosphorus filter is connected with a sewage buffer tank; the sewage buffer tank is connected with the sewage pool.
9. The constant pressure filtration treatment device for phosphorus mud according to claim 6, wherein the phosphorus mud filter is provided with: clear water pipe, heat tracing steam inlet, outlet pipe, heat tracing steam outlet, inlet tube, connect slag pot, balance pipe and blast pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310408144.XA CN116143090A (en) | 2023-04-17 | 2023-04-17 | Constant-pressure filtration treatment method and treatment device for phosphorus mud |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310408144.XA CN116143090A (en) | 2023-04-17 | 2023-04-17 | Constant-pressure filtration treatment method and treatment device for phosphorus mud |
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| CN116143090A true CN116143090A (en) | 2023-05-23 |
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| CN202310408144.XA Pending CN116143090A (en) | 2023-04-17 | 2023-04-17 | Constant-pressure filtration treatment method and treatment device for phosphorus mud |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213958A (en) * | 2013-03-29 | 2013-07-24 | 成都易态科技有限公司 | Method for recovering simple-substance phosphorus from sludge phosphorus via terminal membrane microfiltration and application for same |
| CN206991309U (en) * | 2016-12-30 | 2018-02-09 | 贵州民族大学 | A kind of sludge phosphorus recovery system for sewage treatment plants |
| AU2021100520A4 (en) * | 2021-01-21 | 2021-04-22 | Xuzhou University Of Technology | Biochemical combined sewage treatment method capable of obtaining phosphorus-enriched sludge |
| CN112979109A (en) * | 2021-01-28 | 2021-06-18 | 海宁一泓环境科技有限公司 | Method for in-situ treatment of river sediment phosphorus |
-
2023
- 2023-04-17 CN CN202310408144.XA patent/CN116143090A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213958A (en) * | 2013-03-29 | 2013-07-24 | 成都易态科技有限公司 | Method for recovering simple-substance phosphorus from sludge phosphorus via terminal membrane microfiltration and application for same |
| CN206991309U (en) * | 2016-12-30 | 2018-02-09 | 贵州民族大学 | A kind of sludge phosphorus recovery system for sewage treatment plants |
| AU2021100520A4 (en) * | 2021-01-21 | 2021-04-22 | Xuzhou University Of Technology | Biochemical combined sewage treatment method capable of obtaining phosphorus-enriched sludge |
| CN112979109A (en) * | 2021-01-28 | 2021-06-18 | 海宁一泓环境科技有限公司 | Method for in-situ treatment of river sediment phosphorus |
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