CN112875784A - Process water resource utilization process for membrane coal gasifier - Google Patents
Process water resource utilization process for membrane coal gasifier Download PDFInfo
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- CN112875784A CN112875784A CN202110033231.2A CN202110033231A CN112875784A CN 112875784 A CN112875784 A CN 112875784A CN 202110033231 A CN202110033231 A CN 202110033231A CN 112875784 A CN112875784 A CN 112875784A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 239000012528 membrane Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 72
- 230000008569 process Effects 0.000 title claims abstract description 65
- 239000003245 coal Substances 0.000 title claims abstract description 43
- 239000002699 waste material Substances 0.000 claims abstract description 20
- 238000001704 evaporation Methods 0.000 claims abstract description 16
- 230000008020 evaporation Effects 0.000 claims abstract description 16
- 239000006228 supernatant Substances 0.000 claims abstract description 12
- 238000004064 recycling Methods 0.000 claims abstract description 10
- 239000010797 grey water Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 35
- 238000004458 analytical method Methods 0.000 claims description 28
- 239000000945 filler Substances 0.000 claims description 16
- 238000003795 desorption Methods 0.000 claims description 7
- 238000000108 ultra-filtration Methods 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 238000001728 nano-filtration Methods 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000006227 byproduct Substances 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 6
- 239000000084 colloidal system Substances 0.000 abstract description 4
- 239000003814 drug Substances 0.000 description 7
- 238000002309 gasification Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 239000002270 dispersing agent Substances 0.000 description 5
- 238000001223 reverse osmosis Methods 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002455 scale inhibitor Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- -1 suspended matters Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a membrane method coal gasifier process water resource utilization process, which comprises the following steps: the process water enters a buffer settling tank after being subjected to three-stage flash evaporation treatment, primary settling is carried out, supernatant in the buffer settling tank is conveyed to a membrane device through a pump, and waste residues are discharged from the bottom of the tank; treating the supernatant entering the membrane device and then entering a next-stage softening tank, wherein water produced by one concentrated water end of the membrane device flows back to the buffer settling tank, meanwhile, the other concentrated water end of the membrane device is connected with a deslagging device to realize indirect deslagging, and water produced by the deslagging device also flows back to the buffer settling tank; the softening tank treats the high-salt and high-hardness water and then recycles the treated water to an evaporation hot water tower or a coal gasifier grey water system, and the reuse water is recycled to the inlet of the flash tank for recycling; the process separates colloid, suspended matter and solid content, has no chemical added, low operation cost and stable effluent quality.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a membrane-method coal gasifier process water resource utilization process.
Background
The coal chemical industry is a key development industry in China, the core device of the coal chemical industry is a coal gasifier, a coal gasification process water system is a main facility for ensuring the safe and stable production of the coal gasifier, and the coal gasifier generates a large amount of process water in the production process and has the characteristics of high temperature, high pressure, high turbidity, high suspended matter, high solid content and the like; the process water containing high hardness, high alkalinity, high ammonia nitrogen and high COD is treated by adopting the processes of multi-stage flash evaporation, medicament, gravity settling and the like, and a high-temperature flocculating agent, a coagulant aid, a dispersing agent, a scale inhibitor and the like are required to be added, so that the problems of high medicament consumption, unstable effluent quality, large wastewater discharge amount, high treatment difficulty and the like exist, the problem is the objective production problem of the industry, the coal chemical industry is always troubled for years, the long-period stable operation of the coal gasifier is also restricted, and the economical efficiency of the coal gasifier is further influenced.
In the traditional coal chemical industry, the treatment of the process water of the coal gasifier is carried out by adding a medicament (flocculant), then settling and finally adopting a deslagging device; the method has the following problems after treatment: (1) high suspended matter in water: the concentration of suspended matters in the treated water is high, the water quality is poor, secondary cyclic utilization causes certain damage to system equipment, such as blockage of a spray head, uneven water outlet, failure in achieving the purification effect of the process and the like. (2) High hardness in water: the water hardness reaches more than 1600-2000 mg/l, not only can the formation of calcium carbonate and magnesium scale be induced, but also a part of scaling substances can be softened and gathered together to be adhered to the pipe wall, and the solid suspension is also easy to deposit in the pipeline and equipment, so that the equipment pipeline is more seriously scaled. (3) For the reasons, in order to ensure the stability of the system, a large amount of fresh water can only be continuously injected to increase the amount of discharged water, and the load of the sewage treatment system is increased. (4) The sludge dewatering equipment has large load, and because the water quantity is large, a large amount of flocculating agent and dispersing agent are added into the water, so that the processing capacity of the filter pressing equipment is limited. (5) High-speed washing and large air resistance, thus reducing the service life of the equipment and the strength.
Disclosure of Invention
The application aims to provide a membrane coal gasifier process water resource utilization process, which adopts a process of 'flash evaporation, sedimentation, module, softening, analysis and resource' to treat coal gasification process water, can realize recycling, saves a large amount of water resources, and effectively reduces the dosage of a scale inhibition dispersant; meanwhile, the system scaling problem is effectively reduced, and the operation is stable.
In order to achieve the purpose, the technical scheme of the application is as follows: a membrane method coal gasifier process water resource utilization process comprises the following steps:
the process water enters a buffer settling tank after being subjected to three-stage flash evaporation treatment, primary settling is carried out, supernatant in the buffer settling tank is conveyed to a membrane device through a pump, and waste residues are discharged from the bottom of the tank;
treating the supernatant entering the membrane device and then entering a next-stage softening tank, wherein water produced by one concentrated water end of the membrane device flows back to the buffer settling tank, meanwhile, the other concentrated water end of the membrane device is connected with a deslagging device to realize indirect deslagging, and water produced by the deslagging device also flows back to the buffer settling tank;
the softening tank treats the high-salt and high-hardness water and then recycles the treated water to an evaporation hot water tower or a coal gasifier grey water system, and the reuse water is recycled to the inlet of the flash tank for recycling;
the filler is analyzed at the work interval of the softening tank, the generated analysis waste liquid enters the reactor, the saline water treated by the reactor is used for analyzing the filler again, the analysis capability of the filler recovers the softening capability, the softening tank operates stably, and the enrichment generated in the reactor can be recycled.
Further, inside from last to being equipped with filter sieve an, filter sieve b and water cap down in proper order of buffering settling cask, be connected with turbid water pipeline in buffering settling cask upper portion one side, the opposite side bottom is connected with the water intake pipe, be equipped with turbid water control valve on the turbid water pipeline, be equipped with into water control valve on the water intake pipe.
Furthermore, the bottom of the buffering sedimentation tank is of an inclined structure and is provided with a plurality of vibrating rappers, a discharge screw conveyor is arranged at the low end of the inclined structure and is connected with a vacuum filter press, water produced by the vacuum filter press returns to a water inlet pipeline, and waste residues are discharged outside.
Furthermore, the analytic liquid in the analytic liquid pool is lifted to a filter by an analytic pump and then is sent into a softening tank.
Furthermore, the softening tank is internally provided with a softening filler which can directionally soften the hardness of the grey water at the temperature of 30-120 ℃, and the effluent index is 0-50 mg/L.
Furthermore, the membrane device adopts a nanoscale inorganic membrane with the precision of 200-500 nm.
Further, solveSeparating out waste liquid, namely high-salt high-hardness waste water, and adopting CO as a by-product of a factory2And treating the alkali liquor to realize the recycling of the analysis liquid, and using the analysis liquid as the analysis liquid again or discharging the analysis liquid into an external discharge system.
Furthermore, the reactor comprises a reactor body, and the reactor body is connected with a dosing pump, a clear liquid pump and a sludge pump.
As a further step, the waste liquid from the reactor is treated by adding CO produced as a by-product of the plant2And treating industrial alkali, recycling the clear liquid, and discharging the high-concentration slurry or sending the high-concentration slurry into a slag water plate-and-frame filter press for treatment.
As a further step, the supernatant is subjected to a pretreatment by a multimedia filter, a sand filter, a centrifuge, a ceramic ultrafiltration membrane, a ceramic nanofiltration membrane or a tubular ultrafiltration membrane before entering the membrane device.
Due to the adoption of the technical scheme, the invention can obtain the following technical effects:
1. the process mainly treats process water after multistage flash evaporation, raw water is taken from a final-stage flash evaporator, enters a membrane device, is removed of turbidity, colloid, suspended matters, solid content and the like in the water, then enters a high-temperature membrane softening tank, is removed of hardness, alkalinity, ammonia nitrogen, COD and the like in the water, and produced water is directly recycled to a coal gasification production system or an evaporation hot water tower. The process separates colloid, suspended matter and solid content, has no chemical added, low operation cost and stable effluent quality.
2. The membrane softening process can effectively remove hardness in water, has short flow, high automation degree, small waste liquid amount and small occupied area, and effectively solves the problem of scaling of process water of a coal gasification system.
3. In the operation process, the use of a medicament is cancelled, the operation cost is reduced, water saving and emission reduction are realized, the long-period stable operation of the gasification furnace is facilitated, and the direct benefit, the indirect economic benefit and the environmental protection benefit are obvious.
Drawings
FIG. 1 is a process flow diagram of membrane coal gasifier process water resource utilization;
FIG. 2 is a schematic structural view of a buffer settling tank;
FIG. 3 is a schematic view of a membrane apparatus;
the sequence numbers in the figures illustrate: 1. a coal gasifier water outlet pipeline; 2. a flash tank; 3. a buffer settling tank; 4. a membrane device; 5. a deslagging device; 6. a resolving device; 7. a softening tank; 8. an evaporation hot water tower or a coal gasifier grey water system; 9. a reactor; 10. a filter screen a; 11. a filter sieve b; 12. a water cap; 13. a vibration knocker; 14. a water inlet control valve; 15. a turbid water control valve; 16. a discharge screw conveyor 17 and a vacuum filter press.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples: the present application is further described by taking this as an example.
Example 1
The embodiment provides a membrane coal gasifier process water resource utilization process, which is implemented through a flash tank, a buffer settling tank, a membrane device, a softening tank, an analysis device and a reactor. The buffer settling tank comprises a settling tank body, a centrifugal pump and a matched pipeline instrument valve; the membrane device comprises a nano inorganic membrane group, a centrifugal pump and a matched pipeline instrument valve; the softening tank comprises a softener and a matched pipeline instrument valve; the analysis device comprises an analysis liquid pool, an analysis pump, an analysis filter and a matched pipeline instrument valve; the reactor comprises a reactor body, a clear liquid pump, a dosing pump, a sludge pump and a matched pipeline instrument valve.
The process adopts a process of 'flash evaporation, module, softening, analysis and recovery', coal gasification process water is treated, the process water firstly enters a buffer settling tank after three-stage flash evaporation treatment and is subjected to primary settling, supernatant in the buffer settling tank is conveyed to a membrane device through a pump, waste residues are discharged from the bottom of the tank, supernatant entering the membrane device is treated and then enters a next-stage softening tank, water produced at one concentrated water end of the membrane device flows back to the buffer settling tank, meanwhile, the other concentrated water end is connected with a deslagging device to realize indirect deslagging, and water produced by the deslagging device also flows back to the buffer settling tank; the softening tank treats the high-salt and high-hardness water and then recycles the treated water to an evaporation hot water tower or a coal gasifier grey water system, and recycled circulating water is recycled to the inlet flash tank after passing through the device flow and is recycled. The filler is analyzed at the working interval of the softening tank, the generated analysis waste liquid enters the reactor, the saline water after the treatment of the reactor can be used for analyzing the filler again, the analysis capability of the filler recovers the softening capability, the softening tank stably operates, and the enriched substance generated in the reactor can be recycled, so that the dual benefits of energy conservation, emission reduction and environmental protection are achieved.
The process is implemented in a resource utilization device, the device comprises a flash tank connected with a water outlet pipeline of a coal gasifier, the flash tank is connected with a buffer settling tank, a clear liquid port of the buffer settling tank is connected to a membrane device through a pump, a clear liquid port of the membrane device is connected to a softening tank, the softening tank is connected with an evaporation hot water tower or a coal gasifier grey water system, one concentrated water port of the membrane device is connected back to the buffer settling tank, the other concentrated water port of the membrane device is connected with a deslagging device, and a water outlet of the deslagging device is connected back to the buffer settling tank; the softening tank is also connected with an analysis device, a waste liquid port of the analysis device is connected with the reactor, and a saline port of the reactor is connected back to the analysis device.
In this application process water directly gets into membrane device after tertiary flash distillation, buffering settling cask are handled, not add the medicament, no flocculating agent, no coagulant aid, no scale inhibitor, no dispersant, need not carry out the PH and adjust, need not cool down and handle. After the buffer settling tank performs primary settling action on incoming water, supernatant liquor can overflow or be conveyed to a membrane device through a pump, the lower portion of the buffer settling tank is discharged and spirally pressed to be filtered, filter pressing produced water returns to an inlet, and waste residues are discharged; a water cap layer is arranged in the buffer settling tank, and process water is intercepted by the water cap to the waste residues, so that the effect of preliminary pre-filtering of the process water is achieved; two layers of filter sieves are arranged above the water cap layer, the precision of the lower layer is 100-200 mu m, and the precision of the upper layer is 20-50 mu m. The membrane device mainly removes solids, suspended matters, colloids and the like, comprises a membrane component and a matched pipeline instrument valve, can be combined in parallel or in series to meet the process requirements, can realize continuous work of the device, does not add medicaments or increase ion components in operation, and ensures that the turbidity of pretreated effluent is not more than 5 NTU. Softening tank mainlyThe filler can directionally soften the hardness of the grey water at the temperature of 30-120 ℃ and can endure the severe conditions of high COD, high turbidity, high NH3-N and the like; the water outlet index of the softening tank is generally 0-50 mg/L. The analytic device can carry out the analysis to the filler, makes the analytic ability of filler resume the softening ability, guarantees the softening tank steady operation. The waste liquid generated by the reactor is high-salt high-hardness waste water and can be added with CO produced in a factory2And industrial alkali, clear liquid can be recycled, and high-concentration slurry can be discharged or sent to a slag-water plate-and-frame filter press; or discharged into a discharge system for treatment. And (3) feeding the regenerated desorption waste liquid into a reactor, simultaneously starting a dosing pump and a sludge pump, carrying out filter pressing and discharging on the sludge after the desorption liquid is treated, and sending the supernatant liquid into a desorption liquid pool again through a clear liquid pump for recycling. The membrane device is preferably a nano-scale inorganic membrane with the precision of 200-500nm, a tubular membrane, a silicon carbide membrane, a silicon nitride membrane and the like can be selected, and any medicament is not required, so that the pollution and blockage phenomenon of the membrane component is avoided.
The membrane device can be preposed with a pretreatment device which is a multi-medium filter, a sand filter, a centrifuge, a ceramic ultrafiltration membrane, a ceramic nanofiltration membrane or a tubular ultrafiltration membrane; the residue removing device is a filter and membrane concentration, and the filter can be belt filter press, automatic cleaning filter, box filter press, vacuum filter, disc filter, etc.;
the analysis device can adopt reverse osmosis + electrodialysis, reverse osmosis + evaporation, nanofiltration + reverse osmosis, ultrafiltration + high-pressure reverse osmosis or nanofiltration + high-pressure reverse osmosis, the analysis device generates analysis waste liquid, and the filler recovers the softening capacity.
The membrane method coal gasifier process water resource utilization process treats the coal gasification process water, can realize recycling, saves a large amount of water resources, and effectively reduces the dosage of a scale inhibition dispersant; meanwhile, the system effectively reduces the scaling problem of the system, has stable system operation and obvious direct benefit and indirect economic benefit. In addition, the whole operation period of the system is also improved, and the method has certain engineering demonstration significance.
The above description is only for the purpose of creating a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (10)
1. A membrane method coal gasifier process water resource utilization technology is characterized by comprising the following steps:
the process water enters a buffer settling tank after being subjected to three-stage flash evaporation treatment, primary settling is carried out, supernatant in the buffer settling tank is conveyed to a membrane device through a pump, and waste residues are discharged from the bottom of the tank;
treating the supernatant entering the membrane device and then entering a next-stage softening tank, wherein water produced by one concentrated water end of the membrane device flows back to the buffer settling tank, meanwhile, the other concentrated water end of the membrane device is connected with a deslagging device to realize indirect deslagging, and water produced by the deslagging device also flows back to the buffer settling tank;
the softening tank treats the high-salt and high-hardness water and then recycles the treated water to an evaporation hot water tower or a coal gasifier grey water system, and the reuse water is recycled to the inlet of the flash tank for recycling;
the filler is analyzed at the work interval of the softening tank, the generated analysis waste liquid enters the reactor, the saline water treated by the reactor is used for analyzing the filler again, the analysis capability of the filler recovers the softening capability, the softening tank operates stably, and the enrichment generated in the reactor can be recycled.
2. The membrane coal gasifier process water resource utilization process as claimed in claim 1, wherein the inside of the buffer settling tank is sequentially provided with a filter sieve a, a filter sieve b and a water cap from top to bottom, one side of the upper part of the buffer settling tank is connected with a turbid water pipeline, the bottom of the other side of the upper part of the buffer settling tank is connected with a water inlet pipeline, the turbid water pipeline is provided with a turbid water control valve, and the water inlet pipeline is provided with a water inlet control valve.
3. The membrane coal gasifier process water resource utilization process as claimed in claim 1, wherein the bottom of the buffer settling tank is of an inclined structure and is provided with a plurality of vibrating rappers, a discharge screw conveyor is arranged at the lower end of the inclined structure and is connected with a vacuum filter press, water produced by the vacuum filter press returns to a water inlet pipeline, and waste residues are discharged outside.
4. The membrane coal gasifier process water resource utilization process as claimed in claim 1, wherein the desorption solution in the desorption solution pool is lifted to a filter by a desorption pump and then is sent to a softening tank.
5. The membrane coal gasifier process water resource utilization process as claimed in claim 1, wherein the softening tank is provided with a softening filler, the softening filler directionally softens the hardness of the grey water at 30-120 ℃, and the effluent index is 0-50 mg/L.
6. The process for recycling process water of the membrane coal gasifier as claimed in claim 1, wherein the membrane device employs a nanoscale inorganic membrane with a precision of 200-500 nm.
7. The membrane coal gasifier process water resource utilization process as claimed in claim 1, wherein the desorption waste liquid is high-salt and high-hardness waste water, and CO byproduct of a factory is adopted2And treating the alkali liquor to realize the recycling of the analysis liquid, and using the analysis liquid as the analysis liquid again or discharging the analysis liquid into an external discharge system.
8. The membrane coal gasifier process water resource utilization process as claimed in claim 1, wherein the reactor comprises a reactor body, and the reactor body is connected with a dosing pump, a clear liquid pump and a sludge pump.
9. The membrane coal gasifier process water resource utilization process as claimed in claim 1, wherein the waste liquid of the reactor is treated by adding CO byproduct of factory2And treating with industrial alkali to obtain clear liquid for recyclingAnd discharging the high-concentration slurry or sending the high-concentration slurry into a slag water plate-and-frame filter press for treatment.
10. The membrane coal gasifier process water resource utilization process as claimed in claim 1, wherein the supernatant is pretreated before entering the membrane device, and the pretreatment is performed through a multi-media filter, a sand filter, a centrifuge, a ceramic ultrafiltration membrane, a ceramic nanofiltration membrane or a tubular ultrafiltration membrane.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113277668A (en) * | 2021-06-18 | 2021-08-20 | 海南合和环境科技有限公司 | Integrated electrocatalysis wastewater hardness removal zero-discharge process |
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| CN209383527U (en) * | 2018-12-26 | 2019-09-13 | 大连东道尔膜技术有限公司 | A kind of space flight furnace gasification ash water hardness removing device |
| CN110776153A (en) * | 2019-11-27 | 2020-02-11 | 宝鸡市捷龙商贸有限公司 | Sewage treatment plant is used in colliery processing |
| WO2022100313A1 (en) * | 2020-11-12 | 2022-05-19 | 南京万德斯环保科技股份有限公司 | Mine water advanced treatment system and mine water treatment method thereof |
| CN214422450U (en) * | 2021-01-11 | 2021-10-19 | 大连东道尔膜技术有限公司 | Membrane method coal gasification technology waste water treatment and resourceful device |
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| CN113277668A (en) * | 2021-06-18 | 2021-08-20 | 海南合和环境科技有限公司 | Integrated electrocatalysis wastewater hardness removal zero-discharge process |
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