CN114904295A - Efficient energy-saving separation and recovery system of extraction centrifuge in resin production - Google Patents
Efficient energy-saving separation and recovery system of extraction centrifuge in resin production Download PDFInfo
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- CN114904295A CN114904295A CN202210668070.9A CN202210668070A CN114904295A CN 114904295 A CN114904295 A CN 114904295A CN 202210668070 A CN202210668070 A CN 202210668070A CN 114904295 A CN114904295 A CN 114904295A
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- 238000000605 extraction Methods 0.000 title claims abstract description 87
- 238000011084 recovery Methods 0.000 title claims abstract description 45
- 238000000926 separation method Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000011347 resin Substances 0.000 title claims abstract description 21
- 229920005989 resin Polymers 0.000 title claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000012266 salt solution Substances 0.000 claims abstract description 35
- 239000002699 waste material Substances 0.000 claims abstract description 34
- 238000003860 storage Methods 0.000 claims abstract description 32
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 abstract description 12
- 239000003960 organic solvent Substances 0.000 abstract description 11
- 239000000243 solution Substances 0.000 abstract description 10
- 238000004064 recycling Methods 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 150000003839 salts Chemical class 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002920 hazardous waste Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000012267 brine Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009292 forward osmosis Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0492—Applications, solvents used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0476—Moving receptacles, e.g. rotating receptacles
- B01D11/048—Mixing by counter-current streams provoked by centrifugal force, in rotating coils or in other rotating spaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The invention discloses an efficient energy-saving separation and recovery system of an extraction centrifuge in resin production, which comprises a waste salt solution main pipeline, a nitrogen main pipeline, a heavy phase main pipeline, a recovery main pipeline and a plurality of extraction centrifuges, wherein the extraction centrifuges are arranged in parallel; the last first storage tank that is connected with of terminal extraction centrifuge, the bottom access connection of terminal extraction centrifuge has extractant storage jar, and the upper portion exit linkage of terminal extraction centrifuge has the extractant main line, and the extractant main line is connected with a plurality of extraction centrifuge. By adopting the structure, the organic solvent and the salt solution which are used as harmful substances in the traditional process are separated and recovered, so that the problems of high cost, environmental pollution and resource waste caused by the separation of waste salt solution and organic solvent are solved, the separated solution has high purity and higher recycling value, the treatment cost of the whole system is greatly reduced, and the enterprise benefit is increased.
Description
Technical Field
The invention relates to the technical field of separation and recycling, in particular to an efficient and energy-saving separation and recycling system of an extraction centrifuge in resin production.
Background
With the tightening of the national policy on environmental protection, the industrial waste brine is not allowed to be directly discharged, and the zero emission technology becomes an important way for breaking the contradiction between the industrial development and the water resources and the environment. The developed zero-emission process removes organic substances to a certain extent by methods such as ion exchange, biochemistry, membrane method and the like, and realizes salt preparation by purifying high-concentration mother liquor by discharging, but brings about the problem of mother liquor disposal. In addition, the existing near-zero emission project, the produced salt still belongs to dangerous waste, enterprises need solutions for low-cost disposal, and the market demand is urgent. Therefore, the treatment technology research is carried out aiming at the two aspects of concentrated solution and salt, and the zero-emission business range is widened. For several different treatment technologies of high-salt and high-organic matter wastewater, electrodialysis has the defects of high investment, high operation cost and incapability of meeting the recycling standard of produced water. The forward osmosis process is complex, the technology is immature and the energy consumption is high. The biochemical and advanced oxidation methods aim at the problems of low efficiency and high consumption of the high-salt wastewater due to the adsorption of the activated carbon, and the adsorbed activated carbon also needs hazardous waste disposal and has high cost. And organic matters cannot be completely removed, so that the final inorganic salt product does not reach the standard. There are also reports in the prior art relating to the removal of organic matter from industrial wastewater. Patent CN104190697A relates to a method for recycling hazardous wastes containing water-soluble salts and organic matters, and discloses a method for removing organic matters from hazardous wastes containing water-soluble salts and organic matters through high-temperature desorption, dissolution filtration and residue incineration.
Disclosure of Invention
The invention aims to provide an efficient and energy-saving separation and recovery system for an extraction centrifuge in resin production, which separates and recovers an organic solvent and a salt solution which are harmful substances in the traditional process, solves the problems of high cost, environmental pollution and resource waste caused by the separation of a waste salt solution and the organic solvent, has high purity of the separated solution and higher recycling value, greatly reduces the treatment cost of the whole system, and increases the enterprise benefit.
In order to achieve the purpose, the invention provides an efficient and energy-saving separation and recovery system of an extraction centrifuge in resin production, which comprises a waste salt solution main pipeline, a nitrogen main pipeline, a heavy phase main pipeline, a recovery main pipeline and a plurality of extraction centrifuges, wherein the plurality of extraction centrifuges are arranged in parallel, and each extraction centrifuge is connected with the recovery main pipeline, the heavy phase main pipeline, the nitrogen main pipeline and the waste salt solution main pipeline;
the extraction centrifuge at the tail end is connected with a first storage tank, the first storage tank is connected with the end part of the waste salt solution main pipeline, an extracting agent storage tank is connected with an inlet at the bottom of the extraction centrifuge at the tail end, an extracting agent main pipeline is connected with an outlet at the upper part of the extraction centrifuge at the tail end, and the extracting agent main pipeline is connected with a plurality of extraction centrifuges;
the heavy phase main pipeline is connected with a second storage tank, and the recovery main pipeline is connected with a recovery tank. Preferably, the front end part of the waste salt solution main pipeline is provided with a raw material inlet adjusting valve and a raw material inlet stop valve, and the raw material inlet stop valve is arranged at the rear end of the raw material inlet adjusting valve.
Preferably, the main waste salt solution pipeline is connected with a raw material inlet of the extraction centrifuge through a waste salt solution branch pipeline, and the main waste salt solution pipeline is connected with an extractant inlet of the extraction centrifuge through an extractant branch pipeline.
Preferably, the main nitrogen pipeline is connected with a nitrogen inlet of the extraction centrifuge through a branch nitrogen pipeline.
Preferably, the heavy phase main pipeline is connected with the heavy phase outlet of the extraction centrifuge through a heavy phase branch pipeline.
Preferably, the main recovery pipeline is connected with the extraction centrifuge through a branch recovery pipeline.
Preferably, the waste salt solution branch line, the extractant branch line, the nitrogen branch line, the heavy phase branch line and the recovery branch line are all provided with control valves.
Preferably, the extraction centrifuge at the tail end is connected with the first storage tank through a light phase pipeline, and a light phase outlet cut-off valve is arranged on the light phase pipeline.
Preferably, the extraction centrifuge at the tail end is connected with the extractant storage tank through an extractant inlet pipeline, and an extractant inlet cut-off valve is arranged on the extractant inlet pipeline.
Preferably, the outlet end of the first storage tank, the outlet end of the second storage tank and the outlet end of the recovery tank are connected with delivery pumps.
Therefore, the efficient energy-saving separation and recovery system for the extraction centrifuge in the resin production, which adopts the structure, separates and recovers the organic solvent and the salt solution which are harmful substances in the traditional process, solves the problems of high cost, environmental pollution and resource waste caused by the separation of the waste salt solution and the organic solvent, has high solution purity after separation and higher recycling value, greatly reduces the treatment cost and increases the enterprise benefit.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic flow diagram of an embodiment of an efficient energy-saving separation and recovery system for an extraction centrifuge in resin production according to the present invention.
Detailed Description
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Examples
Fig. 1 is a schematic flow diagram of an embodiment of an efficient energy-saving separation and recovery system for an extraction centrifuge in resin production, and as shown in the drawing, the efficient energy-saving separation and recovery system for an extraction centrifuge in resin production provided by the invention comprises a waste salt solution main pipeline 1, a nitrogen main pipeline 2, a heavy phase main pipeline 3, a recovery main pipeline 4 and a plurality of extraction centrifuges 5, wherein the plurality of extraction centrifuges 5 are arranged in parallel, and each extraction centrifuge 5 is connected with the recovery main pipeline 4, the heavy phase main pipeline 3, the nitrogen main pipeline 2 and the waste salt solution main pipeline 1; the extraction centrifuge 5 at the tail end is connected with a first storage tank 6, the first storage tank 6 is connected with the end part of a waste salt solution main pipeline 1, an extractant storage tank 7 is connected to an inlet at the bottom of the extraction centrifuge 5 at the tail end, an extractant main pipeline 8 is connected to an outlet at the upper part of the extraction centrifuge 5 at the tail end, and the extractant main pipeline 8 is connected with a plurality of extraction centrifuges 5; the heavy phase main pipeline 3 is connected with a second storage tank 9, and the recovery main pipeline 4 is connected with a recovery tank 10. The extraction separation is carried out by arranging multistage countercurrent contact, the extracted light-phase component (salt solution) enters a first storage tank for storage, when the light-phase component in the first storage tank still contains a small amount of organic solvent through detection, namely the light-phase component is unqualified, the light-phase component can enter a system again for extraction until the content of the organic solvent in the light-phase component meets the process requirements, if the light-phase component is qualified, the salt solution can be recovered through a delivery pump, and the extracted heavy-phase component (extractant and organic solvent) enters a second storage tank for storage.
The front end of the waste salt solution main pipeline 1 is provided with a raw material inlet regulating valve 11 and a raw material inlet stop valve 12, and the raw material inlet stop valve 12 is arranged at the rear end of the raw material inlet regulating valve 11. The main waste salt solution line 1 is connected with a raw material inlet of the extraction centrifuge 5 through a waste salt solution branch line 13, and the main waste salt solution line 1 is connected with an extractant inlet of the extraction centrifuge 5 through an extractant branch line 14.
The nitrogen main line 2 is connected to the nitrogen inlet of the extraction centrifuge 5 through a nitrogen branch line 15.
The main heavy phase line 3 is connected to the heavy phase outlet of the extractor centrifuge 5 via a heavy phase branch line 16.
The main recovery line 4 is connected to the extraction centrifuge 5 via a recovery branch line 17.
The waste salt solution branch line 13, the extractant branch line 14, the nitrogen branch line 15, the heavy phase branch line 16 and the recovery branch line 17 are all provided with control valves 18. The inlet and outlet of each extraction centrifuge are provided with control valves, when one or more extraction centrifuges are in fault, the control valves of the inlet and outlet of the extraction centrifuges are closed, the faulty extraction centrifuges can be cut out from the system, the whole line shutdown is not needed, the whole continuous production is not influenced, and the overhaul of the faulty extraction centrifuges is not influenced. When the extraction centrifugal system is integrally stopped for maintenance, nitrogen can be introduced to replace two phases in the equipment, the maintenance safety is ensured, and meanwhile, the residual solution in the centrifuge equipment body can be temporarily recovered. The inlet and outlet of the extraction centrifuge are provided with cut-off valves, and when the liquid level of the storage tank is too high or the delivery pump breaks down, the extraction centrifuge automatically closes the cut-off valves to ensure safety.
The extraction centrifuge 5 at the tail end is connected with the first storage tank 6 through a light phase pipeline 19, and a light phase outlet cut-off valve 20 is arranged on the light phase pipeline 19. The extraction centrifuge 5 at the tail end is connected with the extraction agent storage tank 7 through an extraction agent inlet pipeline 21, an extraction agent inlet cut-off valve 22 is arranged on the extraction agent inlet pipeline 21, and the inlet flow of the extraction agent can be controlled by setting a ratio.
The outlet end of the first storage tank 6, the outlet end of the second storage tank 9 and the outlet end of the recovery tank 10 are connected with a delivery pump 23.
Therefore, the efficient energy-saving separation and recovery system for the extraction centrifuge in the resin production, which adopts the structure, separates and recovers the organic solvent and the salt solution which are harmful substances in the traditional process, solves the problems of high cost, environmental pollution and resource waste caused by the separation of the waste salt solution and the organic solvent, has high solution purity after separation and higher recycling value, greatly reduces the treatment cost and increases the enterprise benefit.
Finally, it should be noted that: the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (10)
1. An extraction centrifuge is energy-efficient separation recovery system in resin production which characterized in that:
the system comprises a waste salt solution main pipeline, a nitrogen main pipeline, a heavy phase main pipeline, a recovery main pipeline and a plurality of extraction centrifuges, wherein the extraction centrifuges are arranged in parallel, and each extraction centrifuge is connected with the recovery main pipeline, the heavy phase main pipeline, the nitrogen main pipeline and the waste salt solution main pipeline;
the extraction centrifuge at the tail end is connected with a first storage tank, the first storage tank is connected with the end part of the waste salt solution main pipeline, an extracting agent storage tank is connected with an inlet at the bottom of the extraction centrifuge at the tail end, an extracting agent main pipeline is connected with an outlet at the upper part of the extraction centrifuge at the tail end, and the extracting agent main pipeline is connected with a plurality of extraction centrifuges;
the heavy phase main pipeline is connected with a second storage tank, and the recovery main pipeline is connected with a recovery tank.
2. The system for efficiently and energy-saving separation and recovery of the extraction centrifuge in resin production according to claim 1 is characterized in that: the front end part of the waste salt solution main pipeline is provided with a raw material inlet adjusting valve and a raw material inlet stop valve, and the raw material inlet stop valve is arranged at the rear end of the raw material inlet adjusting valve.
3. The system for efficiently and energy-saving separation and recovery of resin production by an extraction centrifuge as claimed in claim 2, wherein: the waste salt solution main pipeline is connected with a raw material inlet of the extraction centrifugal machine through a waste salt solution branch pipeline, and the waste salt solution main pipeline is connected with an extracting agent inlet of the extraction centrifugal machine through an extracting agent branch pipeline.
4. The system for efficiently and energy-saving separation and recovery of resin production by an extraction centrifuge as claimed in claim 3, is characterized in that: the nitrogen main pipeline is connected with a nitrogen inlet of the extraction centrifuge through a nitrogen branch pipeline.
5. The system of claim 4 for efficient and energy-saving separation and recovery of resin in the production of extraction centrifuges, which is characterized in that: and the heavy phase main pipeline is connected with a heavy phase outlet of the extraction centrifuge through a heavy phase branch pipeline.
6. The system of claim 5 for efficient and energy-saving separation and recovery of resin in the production of extraction centrifuges, which is characterized in that: the recovery main pipeline is connected with the extraction centrifugal machine through a recovery branch pipeline.
7. The system of claim 6 for efficient and energy-saving separation and recovery of resin in the production of extraction centrifuges, which is characterized in that: and the waste salt solution branch pipeline, the extractant branch pipeline, the nitrogen branch pipeline, the heavy phase branch pipeline and the recovery branch pipeline are all provided with control valves.
8. The system of claim 7 for efficient and energy-saving separation and recovery of resin in the production of extraction centrifuges, which is characterized in that: the extraction centrifuge at the tail end is connected with the first storage tank through a light phase pipeline, and a light phase outlet cut-off valve is arranged on the light phase pipeline.
9. The system of claim 8 for efficient and energy-saving separation and recovery of resin in the production of extraction centrifuges, which is characterized in that: the extraction centrifuge at the tail end is connected with the extraction agent storage tank through an extraction agent inlet pipeline, and an extraction agent inlet stop valve is arranged on the extraction agent inlet pipeline.
10. The system for efficiently and energy-saving separation and recovery of resin production by an extraction centrifuge as claimed in claim 9, is characterized in that: the outlet end of the first storage tank, the outlet end of the second storage tank and the outlet end of the recovery tank are connected with delivery pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210668070.9A CN114904295A (en) | 2022-06-14 | 2022-06-14 | Efficient energy-saving separation and recovery system of extraction centrifuge in resin production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210668070.9A CN114904295A (en) | 2022-06-14 | 2022-06-14 | Efficient energy-saving separation and recovery system of extraction centrifuge in resin production |
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| CN114904295A true CN114904295A (en) | 2022-08-16 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4434028A (en) * | 1981-04-17 | 1984-02-28 | Critical Fluid Systems, Inc. | Apparatus for removing organic contaminants from inorganic-rich mineral solids |
| CN101927984A (en) * | 2009-06-22 | 2010-12-29 | 瓮福（集团）有限责任公司 | Phosphoric acid purification device |
| CN106698575A (en) * | 2017-01-12 | 2017-05-24 | 北京濮源新材料技术研究院(普通合伙) | Method for recovering organic solvent from maleic anhydride wastewater |
| CN106831472A (en) * | 2017-03-03 | 2017-06-13 | 北京宇极科技发展有限公司 | A kind of DMF salt bearing liquid wastes recovery process and system |
| CN107601791A (en) * | 2017-11-15 | 2018-01-19 | 新乡市双诚环保设备有限公司 | High salt organic waste water resource reclaim and handling process |
| CN108101843A (en) * | 2018-02-01 | 2018-06-01 | 湖南正清制药集团股份有限公司 | A kind of Sinomenine and its circular centrifugal preparation method |
| CN210163166U (en) * | 2019-07-04 | 2020-03-20 | 江西天宇化工有限公司 | Production system for reducing organic impurities in salt-containing wastewater |
| CN216614332U (en) * | 2022-01-27 | 2022-05-27 | 聊城鲁西甲胺化工有限公司 | High concentration salt and DMF waste water's processing system and waste water treatment line |
-
2022
- 2022-06-14 CN CN202210668070.9A patent/CN114904295A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4434028A (en) * | 1981-04-17 | 1984-02-28 | Critical Fluid Systems, Inc. | Apparatus for removing organic contaminants from inorganic-rich mineral solids |
| CN101927984A (en) * | 2009-06-22 | 2010-12-29 | 瓮福（集团）有限责任公司 | Phosphoric acid purification device |
| CN106698575A (en) * | 2017-01-12 | 2017-05-24 | 北京濮源新材料技术研究院(普通合伙) | Method for recovering organic solvent from maleic anhydride wastewater |
| CN106831472A (en) * | 2017-03-03 | 2017-06-13 | 北京宇极科技发展有限公司 | A kind of DMF salt bearing liquid wastes recovery process and system |
| CN107601791A (en) * | 2017-11-15 | 2018-01-19 | 新乡市双诚环保设备有限公司 | High salt organic waste water resource reclaim and handling process |
| CN108101843A (en) * | 2018-02-01 | 2018-06-01 | 湖南正清制药集团股份有限公司 | A kind of Sinomenine and its circular centrifugal preparation method |
| CN210163166U (en) * | 2019-07-04 | 2020-03-20 | 江西天宇化工有限公司 | Production system for reducing organic impurities in salt-containing wastewater |
| CN216614332U (en) * | 2022-01-27 | 2022-05-27 | 聊城鲁西甲胺化工有限公司 | High concentration salt and DMF waste water's processing system and waste water treatment line |
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