CN212315616U - High-salt-content high-concentration organic wastewater integrated treatment system - Google Patents
High-salt-content high-concentration organic wastewater integrated treatment system Download PDFInfo
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- CN212315616U CN212315616U CN202021935369.9U CN202021935369U CN212315616U CN 212315616 U CN212315616 U CN 212315616U CN 202021935369 U CN202021935369 U CN 202021935369U CN 212315616 U CN212315616 U CN 212315616U
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Abstract
The utility model discloses an integrated treatment system for high-salt content and high-concentration organic wastewater, which comprises a wastewater pump I, a wastewater pump II, an elutriator, an evaporator, a pyrolysis carbonizer, a slag cooler, a combustion heat exchanger, a purifier, an induced draft fan and a chimney; the utility model discloses an integrated technical scheme and desicator and pyrolysis carbonizer inner packing disturbance dispersed structural design of filler disturbance in "earlier low temperature drying dehydration + back medium temperature pyrolysis carbonization + pyrolysis carbonization resultant waste heat direct recovery are used for waste water drying dehydration", thoroughly solve dry dehydration and pyrolysis carbonization equipment's corruption jam problem and high energy consumption of system, costly problem, finally reach the purpose of low energy consumption, low-cost processing waste water waste salt.
Description
Technical Field
The utility model relates to an industrial wastewater treatment technical field especially relates to a high integrated treatment system of organic waste water who contains salt high concentration.
Background
The industrial waste liquid with high salt and high COD is difficult to be treated in a harmless and recycling way due to high-concentration inorganic salt and a large amount of organic matters or toxic substances which are difficult to be degraded, and becomes an obstacle for restricting the development of enterprises. Industrial waste liquid as a harmful substance also exerts a great pressure on the ecological environment because it cannot be effectively treated in time. Therefore, according to the characteristics of the industrial waste liquid, the method adopts a suitable and effective process and equipment to recover the inorganic salt, realizes resource utilization and performs harmless treatment, thereby having great significance for the development of production enterprises and the ecological environment protection. At present, the treatment of domestic high-salt and high-COD industrial waste liquid mainly comprises the following four methods:
1. natural evaporation treatment, namely discharging high-salinity wastewater generated in industrial production into an evaporation tank for natural evaporation crystallization after pretreatment. The treatment method has the advantages of low wastewater pretreatment condition, low input cost, low operating cost and the like. However, the construction and utilization of the evaporation tank are influenced by land occupation, various conditions of geography and climate, and the crystallized salt is difficult to sell due to poor quality.
2. The evaporative crystallization technology adopts a multi-effect evaporative crystallization technology or MVR technology, and is used for evaporating and concentrating industrial waste liquid to saturation, wherein inorganic salt is crystallized and separated out, so that the purpose of separating salt is achieved. However, too high COD causes technical problems of scaling blockage, heat transfer efficiency reduction and the like in the evaporation and crystallization process, and meanwhile, the crystallized salt cannot be used as an industrial raw material because of organic matters contained in the crystallized salt, needs to be treated in a solid waste form in a centralized way, and has high treatment cost;
3. the membrane method salt separation technology and the membrane separation technology are used for treating industrial waste liquid and mainly comprise the technologies of Microfiltration (MF), Ultrafiltration (UF), Nanofiltration (NF), Reverse Osmosis (RO) dialysis and the like. For the treatment of high-salt and high-COD waste liquid, the technical problem of scaling and blockage also exists in the membrane method treatment, so that membrane pollution and flux attenuation are caused, and continuous normal production cannot be realized.
4. The high-temperature treatment technology can be divided into an incineration method and a high-temperature pyrolysis method. The incineration method is to incinerate the water, organic matters and salt in the waste liquid at high temperature under the aerobic condition to realize the harmless treatment and the reduction of the waste liquid. However, the incineration method mostly uses natural gas as a heat source, the combustion temperature is high and is not easy to control, the production cost is high, the energy consumption is high, the flue gas treatment difficulty is high, the cost is high, and more seriously, the equipment corrosion is serious and the long-term stable operation is difficult to realize due to the high-temperature hot melting of waste salt. The high-temperature pyrolysis method utilizes the instability of organic matters, and the organic matters are carbonized and decomposed under the high-temperature condition of no oxygen or lack of oxygen to form small molecular substances and carbonized particles, so that salt is separated. At present, the main problem of the technology is that inorganic salt melts and bonds equipment at high temperature, so that the equipment is blocked and production operation is influenced.
The technology close to the utility model is mainly a pyrolysis carbonization method: in the prior art, for example, in a patent "a device and a method for carrying out classified carbonization treatment on high-salt-content and high-COD industrial waste liquid" (patent publication No. CN108159718A), the treatment method comprises the steps of atomizing the industrial waste liquid, drying, decomposing and pre-carbonizing, carrying out secondary carbonization on collected powdery solid salt through a carbonization furnace, discharging product salt, and treating carbonized tail gas through a secondary combustion chamber and a waste heat recovery system to realize resource recycling and harmless discharge. However, the technology still does not solve the problems of scaling and blockage of the atomizing nozzle, hot melting and blockage of the carbide and recovery and utilization of waste heat of evaporated water. As another example, the patent "a pyrolysis treatment system for removing organic matters in chemical waste salt" (patent publication No. CN 111288473A), the utility model comprises a primary pyrolysis device, a secondary pyrolysis device and a waste gas treatment system consisting of a quench tower, a spray tower and an organic waste gas purification device. Removing moisture, hydrogen chloride and volatile organic pollutants in the chemical waste salt through first-stage low-temperature pyrolysis, and then performing second-stage medium-temperature anaerobic pyrolysis at a temperature lower than the salt melting temperature to pyrolyze organic matters in the chemical waste salt into gaseous products, and separating the gaseous products from the waste salt; meanwhile, the waste gas generated by the two-stage pyrolysis is treated by a waste gas treatment system and then is discharged after reaching the standard. However, the technology still does not solve the problems of hot melting and blocking of the carbide and waste heat recycling.
The existing drying and dewatering technology for high-salt organic wastewater mostly adopts a direct incineration method, the incineration fuel is mostly natural gas, so that the treatment cost is high, the energy consumption is high, and the solid product after incineration still belongs to dangerous waste, so that the cost is high; the existing waste salt pyrolysis carbonization technology adopts a two-step carbonization method, and mainly has the problems of equipment corrosion and blockage caused by high-temperature hot melting of waste salt, high energy consumption of an equipment system and incapability of long-term stable operation. In conclusion, the existing technical route mainly has the problems of high energy consumption, insufficient energy conservation, insufficient waste heat utilization and easy corrosion and blockage of pyrolysis and carbonization equipment, particularly the problem of corrosion and blockage of the equipment, which directly results in the unstable operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high integrated treatment system of organic waste water who contains salt high concentration to solve the problem that above-mentioned prior art exists, through the integrated technical scheme and the structural design of desicator and pyrolysis carbonizer inner packing disturbance dispersion that "low temperature drying dehydration earlier + middle temperature pyrolysis carbonization + pyrolysis carbonization waste heat direct recovery in back is used for waste water drying dehydration", thoroughly solve the corruption jam problem and the high energy consumption of system, high cost problem of drying dehydration and pyrolysis carbonization equipment, finally reach low energy consumption, the purpose of low-cost processing waste water salt waste.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides an integrated treatment system for high-salt content and high-concentration organic wastewater, which comprises a wastewater pump I, a wastewater pump II, an elutriator, an evaporator, a pyrolysis carbonizer, a slag cooler, a combustion heat exchanger, a purifier, an induced draft fan and a chimney;
the water inlet end of the first wastewater pump is connected with wastewater to be treated, the other end of the first wastewater pump is connected with the water inlet of the elutriator through a pipeline, the water outlet of the elutriator is connected with the water inlet of the second wastewater pump through a pipeline, and the water outlet of the second wastewater pump is connected with the water inlet of the evaporator through a pipeline; the slag outlet of the evaporator is connected with the feed inlet of the pyrolysis carbonizer through a feeder, the pyrolysis gas outlet of the pyrolysis carbonizer is connected with the gas inlet of the eluter through a pipeline, the gas outlet of the eluter is connected with the gas inlet of the combustion heat exchanger through a pipeline, the gas outlet of the combustion heat exchanger is connected with the gas inlet of the purifier through a pipeline, the gas outlet of the purifier is connected with the gas inlet of the induced draft fan through a pipeline, and the gas outlet of the induced draft fan is connected with the gas inlet of the chimney through a pipeline; the residue discharge port of the pyrolysis carbonizer is connected with the feed inlet of the residue discharge cooler, and the residue outlet of the residue discharge cooler is connected with the residue inlet of the residue container; a first steam inlet of the evaporator is connected with a steam outlet of the combustion heat exchanger through a pipeline, and a second steam inlet of the evaporator is connected with a steam outlet of the slag cooler through a pipeline; the first condensate water outlet of the evaporator is connected with a water inlet of a sewage treatment plant through a pipeline, the second condensate water outlet of the evaporator is connected with a water inlet of the slag cooler through a pipeline, and the third condensate water outlet of the evaporator is connected with a water inlet of the combustion heat exchanger through a pipeline.
Preferably, the elution device adopts a direct spraying elution structure, the structure of the elution device is divided into three sections, the upper section is a wastewater spraying section, and a wastewater spray head is arranged on the upper section; the middle section is an elution section and is provided with a gas-liquid distribution sieve plate; the lower section is a water collecting section and is provided with a water collecting tank. The spray head is fixed above the distribution sieve plate in the elution device and is connected with a water outlet of the first waste water pump through a pipeline; the distribution sieve plate is fixed at the middle section of the elution device and plays a role in uniformly distributing gas and water; and the water collecting tank is positioned at the bottom of the elution device at the lower part of the distribution sieve plate, and a water outlet of the water collecting tank is connected with a water inlet of the waste water pump II through a pipeline.
The utility model discloses following beneficial technological effect has been gained for prior art:
(1) the utility model discloses a "evaporation dehydration + pyrolysis carbonization" integrated technology replaces the tradition and burns the technique, waste water treatment temperature greatly reduced to showing reduction energy consumption, practicing thrift the cost, easily industrialization.
(2) The utility model discloses utilize the waste water quenching and tempering harmful gas in the direct elution pyrolysis gas to preheat waste water, not only reduce and avoid pyrolysis gas direct combustion harmful gas to produce, retrieve the pyrolysis gas sensible heat moreover, reach energy-concerving and environment-protective dual effect.
(3) The utility model discloses with the clean gas direct combustion after the elution edulcoration and the heat recovery in the carbonization high temperature residue, the production steam directly is used for the energy of waste water evaporation dehydration, and greatly reduced waste water treatment cost realizes that the system is energy-conserving.
(4) The utility model discloses the steam condensate water that produces the evaporimeter is used as carbonization high temperature residue and volatile branch burning next door heat transfer medium, realizes clean water resource cyclic utilization, has good water conservation and energy saving effect.
(5) The utility model discloses the residue that produces after the pyrolysis carbonization directly is used for mineral fluxing agent or mineral grinding aid or chemical industry salt, realizes solid useless utilization, and then reduces solid useless emission and reduces solid useless treatment cost.
(6) The utility model discloses a filler disturbance dispersion and the dry dehydrator of evaporation steam waste heat recovery + filler disturbance formula electrical heating medium temperature absolute oxygen carbonizer thoroughly solves desicator and pyrolysis carbonizer corrosion blockage difficult problem.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a process flow diagram of the integrated treatment system for high-salt content and high-concentration organic wastewater of the utility model;
in the figure: 1-a wastewater pump I, 2-a wastewater pump II, 3-an eluter, 4-an evaporator, 5-a pyrolysis carbonizer, 6-a slag cooler, 7-a combustion heat exchanger, 8-a purifier, 9-an induced draft fan, 10-a chimney and 11-a slag container.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a high integrated treatment system of organic waste water who contains salt high concentration to solve the problem that prior art exists.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The integrated treatment system for the high-salt-content and high-concentration organic wastewater in the embodiment is shown in fig. 1 and comprises a wastewater pump I1, a wastewater pump II 2, an elutriator 3, an evaporator 4, a pyrolysis carbonizer 5, a slag cooler 6, a combustion heat exchanger 7, a purifier 8, an induced draft fan 9, a chimney 10 and a slag container 11;
one end of the wastewater pump I1 is connected with wastewater to be treated, the other end of the wastewater pump I is connected with a water inlet of the eluter 3 through a pipeline, a water outlet of the eluter 3 is connected with a water inlet of the wastewater pump II 2 through a pipeline, and a water outlet of the wastewater pump II 2 is connected with a water inlet of the evaporator 4 through a pipeline; a slag outlet of the evaporator 4 is connected with a feed inlet of the pyrolysis carbonizer 5 through a feeder, a pyrolysis gas outlet of the pyrolysis carbonizer 5 is connected with a gas inlet of the eluter 3 through a pipeline, a gas outlet of the eluter 3 is connected with a gas inlet of the combustion heat exchanger 7 through a pipeline, a gas outlet of the combustion heat exchanger 7 is connected with a gas inlet of the purifier 8 through a pipeline, a gas outlet of the purifier 8 is connected with a gas inlet of the induced draft fan 9 through a pipeline, and a gas outlet of the induced draft fan 9 is connected with a gas inlet of the chimney 10 through a pipeline; a residue discharge port of the pyrolysis carbonizer 5 is connected through a feed inlet of a residue cooler 6, and a residue outlet of the residue cooler 6 is connected with a residue inlet of a residue container 11; a first steam inlet of the evaporator 4 is connected with a steam outlet of the combustion heat exchanger 7 through a pipeline, and a second steam inlet of the evaporator 4 is connected with a steam outlet of the slag cooler 6 through a pipeline; the first condensate water outlet of the evaporator 4 is connected with a water inlet of a sewage treatment plant through a pipeline, the second condensate water outlet of the evaporator 4 is connected with a water inlet of a slag cooler 6 through a pipeline, and the third condensate water outlet of the evaporator 4 is connected with a water inlet of a combustion heat exchanger 7 through a pipeline.
In the embodiment, the elution device 3 adopts a direct spraying elution structure, the structure of the elution device 3 is divided into three sections, the upper section is a wastewater spraying section, and a wastewater spray head is arranged on the upper section; the middle section is an elution section and is provided with a gas-liquid distribution sieve plate; the lower section is a water collecting section and is provided with a water collecting tank. The spray head is fixed above the distribution sieve plate in the elution device 3 and is connected with the water outlet of the waste water pump I1 through a pipeline; the distribution sieve plate is fixed at the middle section of the elution device 3 and plays a role in uniformly distributing gas and water; the water collecting tank is positioned at the bottom of the elutriator 3 at the lower part of the distribution sieve plate, and a water outlet of the water collecting tank is connected with a water inlet of the waste water pump II 2 through a pipeline.
In this embodiment, the evaporator 4 adopts the device and method for drying and dehydrating by heat exchange condensation in the steam body (patent number: 202010237572.7) disclosed by the utility model, the filler disturbing mechanism and the heat exchange condensing device in the steam pipe generated by waste water evaporation are arranged in the evaporator 4, waste water is firstly contacted with the hot filler in the evaporator 3 for heat exchange, the crystallized salt after the waste water absorbs heat and water evaporation is attached to the surface of the filler, the filler is uniformly disturbed by the filler disturbing mechanism, on one hand, the waste water dispersion heat exchange evaporation is promoted, on the other hand, the stirring and falling of the waste salt crystallized on the surface of the filler are promoted, the surface of the filler is timely updated, the problems of crystallization and blockage of the heat exchange pipe in the dryer are effectively solved, and the drying and dehydrating efficiency; the water vapor generated by the evaporation of the waste water directly enters the heat exchange tube in the evaporator 4 to participate in the heat exchange of the wall of the waste water evaporation, and the latent heat of vaporization of the evaporated water vapor is recovered in situ, so that the energy consumption and the cost of the system are reduced, and the evaporated water after the heat exchange is discharged from the bottom of the evaporator 4 in the form of condensed water.
In this embodiment, the pyrolysis carbonizer 5 adopts the main structure of "a thermoplasticizer" that the utility model has applied for, and spherical high temperature resistant, wear-resisting and corrosion-resistant filler, filler disturbing mechanism and pyrolysis gas one-way discharge mechanism are provided in the pyrolysis carbonizer 5. The oily waste salt is firstly contacted with the red-hot filler in the pyrolysis carbonizer 5 for heat exchange, organic matters in the oily waste salt are heated and decomposed to generate pyrolysis gas, and the pyrolysis gas is discharged from a pyrolysis gas one-way valve discharge mechanism; residues generated by pyrolysis carbonization are attached to the surface of the filler, the filler is uniformly disturbed through the filler disturbing mechanism, on one hand, the dispersed heat exchange of the waste salt containing oil is promoted, on the other hand, the stirring and falling of carbonized residues on the surface of the filler are promoted, the surface of the filler is timely updated, the problems of scaling and blockage of a heating element in the pyrolysis carbonizer 5 are effectively solved, and the pyrolysis carbonization efficiency is improved; the temperature in the pyrolysis carbonizer 5 is easily and timely regulated and controlled by adopting electric heating, so that the temperature is stabilized in a set temperature range, the temperature is controlled below the waste salt hot melting temperature and above the organic matter thermal decomposition temperature, and the problems of equipment corrosion and blockage caused by high-temperature hot melting of the oil-containing waste salt are fundamentally solved.
Based on the integrated treatment system for the high-salt-content and high-concentration organic wastewater provided by the embodiment, the implementation process of the integrated treatment method for the high-salt-content and high-concentration organic wastewater is as follows: firstly, adjusting the pH value of the wastewater to ensure that the wastewater is eluted to remove acidic components in pyrolysis gas products, then pumping the wastewater into an elution device 3 from the top through a wastewater pump I1, feeding pyrolysis gas into the elution device 3 from the lower part, eluting and removing acidic gases (such as hydrogen sulfide, hydrogen chloride and the like) in the pyrolysis gas by using the wastewater, and simultaneously preheating the wastewater by using the waste heat of the pyrolysis gas; waste water preheated by the elutriator 3 is directly pumped into a filler outside a heat exchange pipe in the evaporator 4 through a waste water pump II 2 to perform partition wall heat exchange with external input steam in the heat exchange pipe, the waste water absorbs heat and evaporates to generate evaporation water vapor, the evaporation water vapor enters the heat exchange pipe in the evaporator 4 to participate in evaporation and heat exchange of the waste water, and the evaporation water vapor after heat exchange is finally discharged out of the evaporator 4 in a form of condensed water at 95-98 ℃ and is reused for secondary treatment of a sewage treatment system; after heat exchange is carried out on externally input steam in the evaporator 4, the externally input steam is independently discharged out of the evaporator 4 in a 95-98 ℃ condensed water form, and the condensed water is reused for producing steam in a heat exchange pipe in the eluted pyrolysis gas combustion heat exchanger 7, so that the steam is recycled; the residue after the evaporation of the wastewater is discharged from the bottom of the evaporator 4 and directly enters the pyrolysis carbonizer 5, the pyrolysis carbonizer 5 decomposes the organic components in the residue under the conditions of 400-500 ℃ and electrical heating and air isolation to respectively obtain pyrolysis gas at the temperature of about 200-300 ℃ and carbonized residue at the temperature of 400-500 ℃; the pyrolysis gas enters a wastewater elution device 3, and acidic gas (such as hydrogen sulfide, hydrogen chloride and the like) in the pyrolysis gas is eluted and removed according to an acid-base neutralization theory; the eluent adopts the waste water to be treated, the pH value of the waste water is properly adjusted according to the composition characteristics in the waste water so as to neutralize the acid gas in the pyrolysis gas, thereby achieving the purpose of removing the harmful gas by elution, the pyrolysis gas after elution and impurity removal belongs to clean fuel, the pyrolysis gas after elution and impurity removal directly enters a combustion heat exchanger 7 after coming out of an elutriator 3, the pyrolysis gas is directly combusted in a combustor, the high-temperature gas generated by combustion directly enters the heat exchanger to exchange heat with the wall of condensed water from an evaporator 4, the heat is recovered, and the steam with the temperature of about 150 and 200 ℃ for the evaporator 3 is generated and recycled, thereby realizing the energy recycling; the tail gas with the temperature of about 120 and 150 ℃ generated after heat exchange enters a purifier 8, and the purified clean gas is discharged into a chimney 10 through a draught fan 9; carbonized residues from the pyrolysis carbonizer 5 enter a slag cooler 6, firstly undergo wall heat exchange with condensed water from the evaporator 4 to generate water vapor for recycling as an input steam heat source of the evaporator 4, and the residues after heat exchange and cooling enter a slag container 11 to be used as a mineral grinding aid, a mineral fluxing agent or chemical salt, so that the resource utilization of the residues is realized.
The utility model discloses the principle and the implementation mode of the utility model are explained by applying the concrete examples, and the explanation of the above examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present description should not be construed as a limitation of the present invention.
Claims (2)
1. The utility model provides a high integrated treatment system of organic waste water that contains salt high concentration which characterized in that: the device comprises a wastewater pump I, a wastewater pump II, an eluter, an evaporator, a pyrolysis carbonizer, a slag cooler, a combustion heat exchanger, a purifier, an induced draft fan and a chimney;
the water inlet end of the first wastewater pump is connected with wastewater to be treated, the other end of the first wastewater pump is connected with the water inlet of the elutriator through a pipeline, the water outlet of the elutriator is connected with the water inlet of the second wastewater pump through a pipeline, and the water outlet of the second wastewater pump is connected with the water inlet of the evaporator through a pipeline; the slag outlet of the evaporator is connected with the feed inlet of the pyrolysis carbonizer through a feeder, the pyrolysis gas outlet of the pyrolysis carbonizer is connected with the gas inlet of the eluter through a pipeline, the gas outlet of the eluter is connected with the gas inlet of the combustion heat exchanger through a pipeline, the gas outlet of the combustion heat exchanger is connected with the gas inlet of the purifier through a pipeline, the gas outlet of the purifier is connected with the gas inlet of the induced draft fan through a pipeline, and the gas outlet of the induced draft fan is connected with the gas inlet of the chimney through a pipeline; the residue discharge port of the pyrolysis carbonizer is connected with the feed inlet of the residue discharge cooler, and the residue outlet of the residue discharge cooler is connected with the residue inlet of the residue container; a first steam inlet of the evaporator is connected with a steam outlet of the combustion heat exchanger through a pipeline, and a second steam inlet of the evaporator is connected with a steam outlet of the slag cooler through a pipeline; the first condensate water outlet of the evaporator is connected with a water inlet of a sewage treatment plant through a pipeline, the second condensate water outlet of the evaporator is connected with a water inlet of the slag cooler through a pipeline, and the third condensate water outlet of the evaporator is connected with a water inlet of the combustion heat exchanger through a pipeline.
2. The integrated treatment system for high-salinity high-concentration organic wastewater according to claim 1, characterized in that: the elution device adopts a direct spraying elution structure, the structure of the elution device is divided into three sections, the upper section is a waste water spraying section, and a waste water spray head is arranged on the upper section; the middle section is an elution section and is provided with a gas-liquid distribution sieve plate; the lower section is a water collecting section and is provided with a water collecting tank; the spray head is fixed above the distribution sieve plate in the elution device and is connected with a water outlet of the first waste water pump through a pipeline; the distribution sieve plate is fixed at the middle section of the elution device and plays a role in uniformly distributing gas and water; and the water collecting tank is positioned at the bottom of the elution device at the lower part of the distribution sieve plate, and a water outlet of the water collecting tank is connected with a water inlet of the waste water pump II through a pipeline.
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Assignee: JIANGSU YONGGUAN WATER AND WASTEWATER EQUIPMENT Co.,Ltd. Assignor: Xuzhou waste free city Technology Research Institute Co.,Ltd. Contract record no.: X2022320000378 Denomination of utility model: An Integrated Treatment System for High Salinity and High Concentration Organic Wastewater Granted publication date: 20210108 License type: Exclusive License Record date: 20221222 |
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