CN114890600A - A circulation processing system that is arranged in waste gas waste liquid of vehicle after market - Google Patents
A circulation processing system that is arranged in waste gas waste liquid of vehicle after market Download PDFInfo
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- CN114890600A CN114890600A CN202210532731.5A CN202210532731A CN114890600A CN 114890600 A CN114890600 A CN 114890600A CN 202210532731 A CN202210532731 A CN 202210532731A CN 114890600 A CN114890600 A CN 114890600A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention provides a waste gas and waste liquid circulating treatment system for the after-market of vehicles, and relates to the technical field of sewage treatment. The invention relates to a circulation treatment system for waste gas and liquid in the after-market of vehicles, which comprises: and the spray tower is used for mixing the waste gas with water to form a first mixed solution and discharging the first mixed solution. And the sewage treatment circulating system is connected with the spray tower and used for treating a second mixed solution formed by mixing the first mixed solution and the waste liquid in the spray tower to obtain treated reclaimed water, and simultaneously discharging the reclaimed water to circulate to the spray tower for recycling. The waste gas is dissolved in water through the spray tower, and then enters the sewage treatment circulating system together with the waste liquid for treatment, and the treated reclaimed water is further circulated and returned to the spray tower for recycling, so that the waste gas and waste liquid circulating treatment system disclosed by the invention realizes energy conservation and environmental protection, saves water resources and reduces the cost.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a circulating treatment system for waste gas and liquid in the after-market of vehicles.
Background
At present, the trend of the water-based vehicle spraying coating in the vehicle after-market is more obvious. Whether oil-based or water-based, it requires disposal to meet environmental requirements. In addition, in the vehicle aftermarket, the places where the treatment of the vehicles is located are mostly the city central positions, the requirement on environmental protection is high, the area of a factory building for treating the waste gas and the waste water is limited, and in addition, for the purpose of preventing stink, the environmental protection specification has strict limitation on the construction of an aeration tank, so that the waste gas and the waste water cannot be treated through a large-area aeration tank. At present, in the water-based paint commonly used in the vehicle spraying process, the commonly used alcohol, alcohol ether and alcohol ester solvents have serious environmental pollution. At present, the general treatment scheme is to collect the waste water and liquid after spraying and treat the collected waste water and liquid as hazardous waste. However, even if the degree of water and air pollution is reduced, the method has no help for emission reduction, and has high treatment cost and difficulty in meeting market requirements. On the contrary, water is used as a diluent in the conventional process due to the particularity of the water-based paint, and the water can be directly used for washing the gun, so that if the water is completely discharged, the resource waste is caused.
Disclosure of Invention
An object of the first aspect of the present invention is to provide a recycling system for waste water and waste liquid in the after-market of vehicles, which solves the problem of serious environmental pollution caused by waste water and waste liquid in the after-market of vehicles in the prior art.
Another object of the first aspect of the invention is to solve the problem of water waste in the prior art.
In particular, the present invention provides a system for the cyclic treatment of waste gases and liquids in the aftermarket of vehicles, comprising:
the spray tower is used for mixing the waste gas with water to form a first mixed solution and discharging the first mixed solution; and
and the sewage treatment circulating system is connected with the spray tower and used for treating a second mixed solution formed by mixing the first mixed solution and the waste liquid in the spray tower to obtain treated reclaimed water, and simultaneously discharging the reclaimed water to circulate to the spray tower for recycling.
Optionally, the wastewater treatment cycle system comprises:
the first filtering device is connected with the spray tower through a pipeline and is used for filtering the second mixture and discharging filter residues and sewage;
the sewage treatment system is connected with the first filtering device through a pipeline and is used for treating sewage in the first filtering device so as to discharge reclaimed water containing waste residues; and
and the second filtering device is connected with the sewage treatment system and the spray tower through pipelines and is used for filtering the reclaimed water containing the waste residues after the treatment in the sewage treatment system to obtain reclaimed water and then circulating the reclaimed water into the spray tower for recycling.
Optionally, the sewage treatment cycle system further comprises:
the water storage tank is arranged between the spray tower and the first filtering device, is communicated with the spray tower through a pipeline and is used for storing the second mixture; and
and the middle water tank is arranged between the second filtering device and the spray tower and is used for storing the middle water discharged from the second filtering device to be used by the spray tower.
Optionally, the wastewater treatment system comprises:
the sewage treatment device is used as a device for removing water-soluble organic matters in sewage by reacting the sewage with an oxidant under the conditions of preset temperature and preset pressure;
the heat exchange device is connected with the sewage treatment device in series and is used for preheating the sewage and then introducing the preheated sewage into the sewage treatment device, and cooling a product obtained after reaction in the sewage treatment device through the heat exchange device;
wherein, the sewage treatment device and the heat exchange device are integrated in the same tubular reactor.
Optionally, an oscillator is further included, which provides vibrational mixing of the liquid in the tubular reactor by modes of vacuum drawing, mechanical reciprocation, mechanical vibration, ultrasonic vibration, to prevent the occurrence of laminar flow of the liquid in the tubular reactor. Optionally, the oxidant is oxygen;
the preset temperature is 210-300 ℃, and the preset pressure is 50-150 atm;
the sewage and the oxygen react in the sewage treatment device under the conditions that the temperature is 210-300 ℃ and the pressure is 50-150 atm, so that water-soluble organic matters in the sewage are removed.
Optionally, each of the heat exchanging devices includes a sewage flowing pipe and a clean water flowing pipe, the sewage flowing pipe and the clean water flowing pipe are integrated close to each other to form one heat exchanging device, so as to cool the reacted product through the low temperature in the sewage flowing pipe, and simultaneously, the reacted product flows through the clean water flowing pipe to preheat the sewage.
Optionally, the number of the heat exchange devices is multiple, the multiple heat exchange devices comprise multiple sewage flow pipelines and multiple purified water flow pipelines, the multiple sewage pipelines are sequentially connected in series before the sewage treatment device to sequentially preheat the sewage, and the multiple purified water flow pipelines are sequentially connected after the sewage treatment device to sequentially cool products after the sewage treatment device; the oscillator is arranged between the liquid inlet of the sewage circulating pipeline of the heat exchange device farthest away from the sewage treatment device and the liquid outlet of the purified water circulating pipeline.
Optionally, the system further comprises a pressure reduction separation device which is arranged behind the heat exchange device and in front of the reclaimed water pool, and the pressure reduction separation device is connected with a liquid outlet of the purified water circulation pipeline of the heat exchange device to perform pressure reduction and gas-liquid separation on a product treated by the cooled sewage treatment device, and discharge reclaimed water.
Optionally, the spray tower comprises:
the spray head is used for spraying water and/or reclaimed water and is arranged above the spray tower;
the air inlet is used for introducing the waste gas and fully mixing the waste gas with water and/or reclaimed water sprayed by the spray head to obtain the first mixed liquid;
the gas outlet is used for discharging gas which is not compatible with water in the waste gas;
and the liquid outlet is used for discharging the first mixed liquid after the waste gas is compatible with the water.
In this scheme, dissolve waste gas in water through the spray column, enter into the inside processing that handles of sewage treatment circulating system together with the waste liquid again, reuse in the recycled water (by cyclic utilization's water) after handling the completion returns the spray column in further circulation again for the cyclic treatment system of the waste gas waste liquid of this embodiment both can effectually detach the pollutant in waste gas and the waste liquid, can realize the cyclic utilization of water again, thereby when realizing energy-concerving and environment-protective, the water economy resource, reduce cost. The circulation processing system of waste gas waste liquid of this scheme has realized the linkage processing of waste gas waste liquid, can effectively promote the treatment effeciency to reduce the treatment cost of waste gas and waste liquid by a wide margin.
The sewage treatment circulating system in this scheme carries out filtration treatment to the second mixture through first filter equipment, so can effectively get rid of the waste residue in the useless second mixture to form the sewage that can be handled by sewage treatment system, and recycle second filter equipment after sewage treatment system handles to go out the waste residue that follow-up sediment got off, thereby obtain can be by spray column cyclic utilization's normal water, realize the zero release of waste gas waste liquid and the recycle of normal water.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of a system for recycling exhaust waste liquid in the after-market of vehicles according to one specific embodiment of the present invention;
FIG. 2 is a schematic block diagram of a recycling system for exhaust waste liquid in the after-market of vehicles according to another specific embodiment of the present invention;
FIG. 3 is a schematic block diagram of a system for recycling exhaust waste liquid in the after-market of vehicles according to one specific embodiment of the present invention;
FIG. 4 is a schematic block diagram of a spray tower according to a specific embodiment of the present invention;
FIG. 5 is a schematic block diagram of a sewage treatment system for use in the aftermarket of vehicles in accordance with a specific embodiment of the present invention;
FIG. 6 is a schematic block diagram of a sewage treatment system for use in the aftermarket of vehicles according to a specific embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic configuration diagram of a circulation treatment system for exhaust waste liquid in the after-market of vehicles according to one specific embodiment of the present invention.
As a specific embodiment of the present invention, the recycling system 100 for exhaust gas waste liquid in the vehicle aftermarket of the present embodiment is mainly used for treating exhaust gas or waste liquid of paint for painting vehicles in the vehicle aftermarket. The paint for spraying vehicles in this embodiment is a water-based paint, and the contaminants mainly to be treated in the interior thereof include alcohols, alcohol ethers, and alcohol ester solvents, and these solvents are often mixed with water during use or after-treatment.
The circulation treatment system 100 for exhaust gas waste liquid in the after-market of vehicles of the present embodiment may include a spray tower 200 and a sewage treatment circulation system 300. The spray tower 200 is configured to mix the exhaust gas with water to form a first mixed solution, and discharge the first mixed solution. The sewage treatment circulating system 300 is connected to the spray tower 200, and is configured to treat a second mixed solution formed by mixing the first mixed solution and the waste liquid in the spray tower 200 to obtain treated reclaimed water, and discharge the reclaimed water to circulate to the spray tower 200 for reuse.
In this embodiment, dissolve waste gas in water through spray column 200, enter into sewage treatment circulation system 300 with the waste liquid again inside and handle, the reuse in the reuse is returned to spray column 200 by the further circulation of the normal water (the water of cyclic utilization) after handling the back completion again, make the waste gas waste liquid's of this embodiment circulation processing system 100 both can effectually detach the pollutant in waste gas and the waste liquid, can realize the cyclic utilization of water again, thereby when realizing satisfying energy-concerving and environment-protective on limited place, water economy resource, and low cost. The circulation processing system 100 for waste gas and waste liquid of the embodiment realizes linkage processing of waste gas and waste liquid, can effectively improve the processing efficiency, and greatly reduces the processing cost of waste gas and waste liquid.
FIG. 2 is a schematic block diagram of a recycling system for exhaust waste liquid in the after-market of vehicles according to another specific embodiment of the present invention;
as a specific example of the present invention, the sewage treatment cycle system 300 of the present embodiment may include a first filtering device 310, a sewage treatment system 400, and a second filtering device 320. The first filtering device 310 is connected to the spray tower 200 through a pipe for filtering the second mixture and discharging the residue and the contaminated water. The sewage treatment system 400 is connected to the first filtering apparatus 310 through a pipe, and is used for treating sewage in the first filtering apparatus 310 to discharge reclaimed water containing waste residues. The second filtering device 320 is connected to the sewage treatment system 400 and the spray tower 200 through a pipeline, and is configured to filter the reclaimed water containing the waste residues treated in the sewage treatment system 400 to obtain reclaimed water, and then circulate the reclaimed water into the spray tower 200 for reuse.
The sewage treatment circulation system 300 in this embodiment filters the second mixture through the first filtering device 310, so as to effectively remove waste residues in the waste second mixture, thereby forming sewage which can be treated by the sewage treatment system 400, and after the sewage treatment system 400 finishes treatment, the second filtering device 320 is used to remove waste residues from subsequent precipitation, thereby obtaining reclaimed water which can be recycled by the spray tower 200, and realizing zero emission of waste gas and waste liquid and recycling of the reclaimed water.
FIG. 3 is a schematic block diagram of a system for recycling exhaust waste liquid in the after-market of vehicles according to one specific embodiment of the present invention;
as an embodiment of the present invention, the sewage treatment recycling system 300 of this embodiment may further include a water reservoir 330 and a middle water pool 340. Wherein a water reservoir 330 is disposed between the spray tower 200 and the first filtering device 310 to communicate with the spray tower 200 through a pipe for storing the second mixture. The middle water tank 340 is disposed between the second filtering device 320 and the spray tower 200, and stores the middle water discharged from the second filtering device 320 to be used by the spray tower 200.
In the embodiment, the water reservoir 330 is disposed behind the spray tower 200, so that the first mixture can be mixed with the waste liquid at the water reservoir 330 to form a second mixture, and the second mixture can be litigation connected to the first filtering device 310 for filtering, so that a dynamic balance can be formed between the spray tower 200 and the filtering device. The middle water tank 340 arranged between the sewage treatment device and the spray tower 200 can store the sewage treated in the sewage treatment circulating system 300 for later use through the middle water tank 340, and the dynamic balance between the sewage treatment circulating system 300 and the spray tower 200 can be formed.
Fig. 4 is a schematic block diagram of a spray tower according to a specific embodiment of the present invention. As a specific embodiment of the present invention, the spray tower 200 of the present embodiment may include a spray head 210, a gas inlet 220, a gas outlet 230, and a liquid outlet 240. The spray head 210 is used to spray water and/or middle water, and the spray head 210 is disposed above the spray tower 200. The air inlet 220 is used for introducing the waste air, and the waste air can be fully mixed with the water and/or the middle water sprayed by the spray head 210 to obtain a first mixed liquid. The gas outlet 230 is used to discharge water-insoluble gas in the exhaust gas. The liquid discharge port 240 is used to discharge the first mixed liquid after the exhaust gas is compatible with water.
FIG. 5 is a schematic block diagram of a sewage treatment system 400 for use in the aftermarket of vehicles according to a specific embodiment of the present invention.
As a specific embodiment of the present invention, the sewage treatment system 400 of the present embodiment may include a sewage treatment apparatus 410 and at least one heat exchange apparatus 420. Specifically, the sewage treatment apparatus 410 is used as an apparatus for removing water-soluble organic substances in sewage by reacting the sewage with an oxidizing agent under conditions of a preset temperature and a preset pressure. The at least one heat exchange device 420 is connected in series with the sewage treatment device 410, and is used for preheating sewage and then introducing the preheated sewage into the sewage treatment device 410, and cooling a product obtained after reaction in the sewage treatment device 410 through the heat exchange device 420. Wherein, the sewage treatment device 410 and the heat exchange device 420 are both tubular reactors or are integrated in the same tubular reactor.
Specifically, the sewage treatment system 400 of this embodiment may include the sewage treatment device 410 and the heat exchange device 420, heat sewage through the heat exchange device 420 for sewage can react with the oxidant under certain conditions inside the sewage treatment device 410, thereby remove the water-soluble organic matter in the sewage, make in the market behind the vehicle, can in time detach when the spraying coating is water-soluble coating, thereby avoid harmful organic matter polluted environment in the coating. Meanwhile, the sewage treatment system 400 can recycle reclaimed water after sewage treatment is finished, so that the water consumption is reduced, and the cost is reduced.
In addition, because the temperature and the pressure required for sewage treatment are high in the embodiment, the sewage treatment device 410 and the heat exchange device 420 of the embodiment are integrated in the same tubular reactor, so that the high-temperature and high-pressure conditions for sewage removal are easy to achieve, and the method is very safe. In addition, the tubular reactor has small volume, low cost, high processing speed, controllability and reliability, and the equipment can simply realize the multiplication of the processing speed through the change of the number of pipelines. The accurate design of the diameter of the pipeline can obtain the optimal balance in various aspects such as water body treatment efficiency, mass transfer efficiency, heat transfer efficiency and the like, and can effectively prevent the occurrence of laminar flow.
FIG. 6 is a schematic block diagram of a sewage treatment system for use in the after-market of vehicles according to another specific embodiment of the present invention.
As a specific embodiment of the present invention, the sewage treatment system 400 of this embodiment may further include an oscillator 430, which provides vibrational mixing to the liquid in the tubular reactor through vacuum drawing, mechanical reciprocating, mechanical vibration, and ultrasonic vibration modes to prevent the occurrence of laminar flow of the liquid in the tubular reactor. In this embodiment, the oscillator 430 continuously pushes the whole material to be fed and also oscillates back and forth according to a certain frequency, so as to avoid the condition that the materials are not uniformly mixed or laminar flow occurs in the tubular reactor. The materials in the reactor are mixed more uniformly by the oscillator 430, so that the reaction is more uniform and thorough.
The oscillator 430 of this embodiment may be a piston oscillator 430, which moves the liquid in the tubular reactor back and forth by the back and forth movement of the piston according to a certain frequency.
As a specific example of the present invention, the oxidant in this embodiment is oxygen. In this embodiment, the reaction between the sewage and the oxidant in the sewage treatment device is only to mix the oxygen and the sewage and then react to remove the organic matters in the sewage effectively. The embodiment takes oxygen as an oxidant to react, does not need to add any other materials, saves the cost and effectively avoids secondary pollution.
As a specific example of the present invention, the preset temperature of the present embodiment may be 210 ℃ to 300 ℃, and the preset pressure may be 50atm to 150 atm. The sewage reacts with oxygen in the sewage treatment device 410 under the conditions of the temperature of 210-300 ℃ and the pressure of 50-150 atm, thereby removing the water-soluble organic matters in the sewage. Specifically, the preset temperature of the present embodiment may be 210 ℃, 240 ℃, 280 ℃ or 300 ℃. The preset pressure may be 50atm, 60atm, 80atm, 120atm, or 150 atm.
In this embodiment, when the temperature is about 210 ℃ and the pressure is 50atm to 80atm, the sewage enters a subcritical state, and the sewage and oxygen undergo an oxidation reaction, so that organic matters in the sewage can be removed, and the COD in the sewage can be reduced. When the temperature is about 300 ℃ and the pressure is about 150atm, the sewage enters a supercritical state, and the reaction efficiency of organic matters in the sewage and oxygen is higher and the decontamination capability is stronger. In this embodiment, the COD of the wastewater treated by the above method can be reduced from 20000mg/L to 30000mg/L to about 1000 mg/L.
In this embodiment, sewage is heated and pressurized to a supercritical state or a subcritical state in the sewage treatment device 410 by oxygen to effectively reduce COD in sewage, thereby realizing a sewage purification function, and no impurities are introduced, and no pollutant exists after the reaction, thereby realizing zero emission. Meanwhile, as the sewage treatment system 400 of the embodiment does not need extra chemical dosing, other extra impurities cannot be contained in reclaimed water, the situation that the chemicals cause structure or corrosion to the spray tower 200 is prevented, the equipment loss is reduced, and the operation cost is further reduced.
Specifically, in this embodiment, before the sewage and the oxygen are delivered to the heat exchange device 420, the high-pressure air is introduced into the tubular reactor, and the sewage is introduced into the tubular reactor by the plunger pump, premixed, and further delivered into the heat exchange device 420. Inside the tubular reactor, the pressure thereof is always maintained at a preset pressure state.
As a specific embodiment of the present invention, each of the heat exchanging devices 420 of this embodiment includes a sewage flowing pipe and a clean water flowing pipe, which are integrated to be close to each other into one heat exchanging device 420, so as to cool the reacted product by the low temperature in the sewage pipe, and to preheat the sewage by the reacted product flowing through the clean water flowing pipe.
In this embodiment, set up sewage circulation pipeline and water purification circulation pipeline through heat transfer device 420, let sewage and water exchange each other, also cool off for the water purification when the sewage heating to increase thermal utilization ratio, reduce the heat loss, reduce the energy consumption.
As a specific embodiment of the present invention, the number of the heat exchanging devices 420 in this embodiment is multiple, the multiple heat exchanging devices 420 include multiple sewage circulating pipelines and multiple purified water circulating pipelines, the multiple sewage pipelines are sequentially connected in series before the sewage treatment device 410 to sequentially preheat sewage, and the multiple purified water circulating pipelines are sequentially connected after the sewage treatment device 410 to sequentially cool products after the sewage treatment device 410; the oscillator 430 is disposed between the inlet end of the sewage flow pipe of the heat exchange device 420 farthest from the sewage treatment device 410 and the outlet end of the clean water flow pipe.
The heat transfer device 420 of this embodiment is a plurality of, can establish ties heat transfer device 420, heats sewage many times, also cools off the water purification many times to reach the purpose to sewage treatment's temperature, improve heat recovery's ability simultaneously.
As a specific embodiment of the present invention, the number of the heat exchanging devices 420 of this embodiment is two, which are the first heat exchanging device 421 and the second heat exchanging device 422, the first heat exchanging device 421 may include a first sewage flowing pipeline 423 and a first clean water flowing pipeline 424, and the second heat exchanging device 422 may include a second sewage flowing pipeline 425 and a second clean water flowing pipeline 426. The sewage flows through the first sewage flow pipe 423 and the second sewage flow pipe 425 in sequence and then enters the sewage treatment apparatus 410, and the products of the reaction flow through the second purified water flow pipe 426 and the first purified water flow pipe 424 in sequence and then flow out.
In this embodiment, the number of the heat exchanging devices 420 is two, and the two heat exchanging devices may be the first heat exchanging device 421 and the second heat exchanging device 422, and the sewage and the purified water in the two heat exchanging devices can exchange heat with each other. Generally, the temperature of the product from the sewage treatment device 410 is still high, and if only one heat exchange device 420 is used to cool the product, the temperature is generally not lower than 100 ℃, and when the temperature is not lower than 100 ℃, the internal water still exists in a gas form, so that the purpose of recycling cannot be achieved. Therefore, the two heat exchange devices 420 of the embodiment are arranged, so that the temperature of the product after the sewage treatment device 410 is reduced to be below 100 ℃.
In the actual production process, since the temperature of the purified water needs to be reduced to less than 100 ℃ by cooling the purified water at the first heat exchange device 421, and the first heat exchange device 421 does not meet the requirement, a cooling mechanism 450 needs to be further arranged outside the first purified water circulation pipeline 424 of the first heat exchange device 421 to reduce the temperature of the purified water in the first purified water circulation pipeline 424. Specifically, the cooling mechanism 450 may be air-cooled or other devices that can be cooled.
Specifically, since the sewage treatment device 410 is connected behind the second heat exchange device 422, and the reaction between the sewage in the sewage treatment device 410 and the oxygen needs a higher temperature, the sewage needs to be heated to a certain temperature at the second heat exchange device 422, and the second heat exchange device 422 often cannot meet the requirement, in this embodiment, the first heating device 440 is further disposed at the second sewage circulation pipe 425 of the second heat exchange device 422 to heat the sewage in the second sewage circulation pipe 425, and the heat of the first heating device 440 comes from the sewage treatment device 410. In the embodiment, the first heating device 440 may be heated by using heat transfer oil, and the heat transfer oil is heated by the sewage treatment device 410. Since the reaction of the sewage inside the sewage treatment apparatus 410 with oxygen is combustion in nature, it emits a large amount of heat during combustion, and the heat can be utilized to heat the second sewage circulating pipe 425 of the second heat exchanging apparatus 422, thereby reducing the consumption of external energy.
Of course, in the actual use process, since the sewage and the oxygen will finally react inside the sewage treatment device 410, and the temperature of the sewage does not reach the reaction temperature before the sewage enters the sewage treatment device 410, the second heating device 460 is further disposed at the sewage treatment device 410, so that the temperature inside the sewage treatment device 410 heated by the sewage treatment device 410 can reach 210 ℃ to 300 ℃, that is, the reaction temperature is reached.
As a specific embodiment of the present invention, the sewage treatment system 400 of this embodiment may further include a pressure-reducing separation device 470, which is disposed behind the heat exchange device 420, and the pressure-reducing separation device 470 is communicated with a liquid outlet of the purified water circulation pipeline of the heat exchange device 420 to perform pressure reduction and gas-liquid separation on the purified water.
After the temperature of the product after the sewage treatment device 410 is reduced by the two heat exchange devices 420, the temperature of the product is reduced to below 100 ℃, at this time, the water in the product is pure in a liquid form, some gas still contained in the product is gas, the pressure in the heat exchange devices 420 is still large, so that the pressure reduction of the product is needed, after the pressure reduction, the gas is released to the controller, and the liquid (mainly water) can be further recycled.
At present, the technological parameters after the vehicle post-treatment sewage is purified by the device and the method are as follows:
from the above table, it can be seen that, after the sewage is treated by the apparatus and the method in the above embodiments, the COD of the sewage is greatly reduced, and the more the air is introduced, the higher the efficiency is, the higher the sewage treatment efficiency is, otherwise, the more the sewage is fed, the lower the efficiency is. Specifically, the overall structure of the system 100 for recycling exhaust gas waste liquid in the after-market of vehicles of the present embodiment includes a spray tower 200, a water reservoir 330, a first filtering device 310, a sewage treatment system 400, a second filtering device 320, and a reclaimed water tank 340 in this order. Waste gas forms first mixed liquid after water and/or well water in the spray column 200 sprays and enters into the cistern 330 inside, and the waste liquid then directly enters into the cistern 330 inside, and first mixed liquid forms the second mixed liquid with the waste liquid in the cistern to filter through first filter equipment 310, and the sewage after the filtration forms the normal water after sewage treatment system 400 handles, and it is waiting for spray column 200 cycle to use to enter well pond 340 after second filter equipment 320 filters again. The process can effectively improve the treatment efficiency by simultaneously treating the waste gas and the waste liquid, and greatly reduce the treatment cost of the waste gas and the waste liquid. Because the sewage treatment system 400 of this embodiment can go out most organic matters in the sewage, form the middling water that COD content is lower to this middling water also can further reuse, thereby realized the reuse of reclaimed water of waste water and the zero release of sewage.
Specifically, the sewage treatment system 400 of the embodiment includes the sewage treatment device 410 and the heat exchange device 420, so that the sewage is heated to a certain temperature by the heat exchange device 420, and the sewage and the oxygen are reacted under the conditions of a preset temperature and a preset pressure (a subcritical or supercritical state) by adopting a wet combustion technology in the sewage treatment device 410, and finally most of organic matters in the water are discharged, thereby completing purification of inorganic matters in the water, and the water is discharged for recycling.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A recycling system for exhaust waste liquid in the after-market of vehicles, characterized by comprising:
the spray tower is used for mixing the waste gas with water to form a first mixed solution and discharging the first mixed solution; and
and the sewage treatment circulating system is connected with the spray tower and used for treating a second mixed solution formed by mixing the first mixed solution and the waste liquid in the spray tower to obtain treated reclaimed water, and simultaneously discharging the reclaimed water to circulate to the spray tower for recycling.
2. The recycling treatment system for exhaust gas waste liquid in vehicle aftermarket according to claim 1,
the sewage treatment circulating system comprises:
the first filtering device is connected with the spray tower through a pipeline and is used for filtering the second mixture and discharging filter residues and sewage;
the sewage treatment system is connected with the first filtering device through a pipeline and is used for treating sewage in the first filtering device so as to discharge reclaimed water containing waste residues; and
and the second filtering device is connected with the sewage treatment system and the spray tower through pipelines and is used for filtering the reclaimed water containing the waste residues after the treatment in the sewage treatment system to obtain reclaimed water and then circulating the reclaimed water into the spray tower for recycling.
3. The recycling treatment system for exhaust gas waste liquid in vehicle aftermarket according to claim 2,
the sewage treatment circulating system further comprises:
the water storage tank is arranged between the spray tower and the first filtering device, is communicated with the spray tower through a pipeline and is used for storing the second mixture; and
and the middle water tank is arranged between the second filtering device and the spray tower and is used for storing the middle water discharged from the second filtering device to be used by the spray tower.
4. The recycling treatment system for exhaust gas waste liquid in vehicle aftermarket according to claim 3,
the sewage treatment system comprises:
the sewage treatment device is used as a device for removing water-soluble organic matters in sewage by reacting the sewage with an oxidant under the conditions of preset temperature and preset pressure;
the heat exchange device is connected with the sewage treatment device in series and is used for preheating the sewage and then introducing the preheated sewage into the sewage treatment device, and cooling a product obtained after reaction in the sewage treatment device through the heat exchange device;
wherein, the sewage treatment device and the heat exchange device are both tubular reactors.
5. The recycling processing system for exhaust gas waste liquid in vehicle aftermarket according to claim 4,
the device also comprises an oscillator which provides vibration mixing for the liquid in the tubular reactor through modes of vacuum drawing, mechanical reciprocating, mechanical vibration and ultrasonic vibration so as to prevent the liquid in the tubular reactor from generating laminar flow.
6. The recycling treatment system for exhaust gas waste liquid in vehicle aftermarket according to claim 5,
the oxidant is oxygen in the air;
the preset temperature is 210-300 ℃, and the preset pressure is 50-150 atm;
the sewage and the oxygen react in the sewage treatment device under the conditions that the temperature is 210-300 ℃ and the pressure is 50-150 atm, so that water-soluble organic matters in the sewage are removed.
7. The recycling treatment system for exhaust gas waste liquid in vehicle aftermarket according to claim 5,
each heat exchange device comprises a sewage flow pipeline and a purified water flow pipeline, the sewage flow pipeline and the purified water flow pipeline are integrated into one heat exchange device, so that a reacted product is cooled through low temperature in the sewage pipeline, and meanwhile, the reacted product flows through the purified water flow pipeline to preheat sewage.
8. The recycling treatment system for exhaust gas waste liquid in vehicle aftermarket according to claim 7,
the number of the heat exchange devices is multiple, the heat exchange devices comprise a plurality of sewage flow pipelines and a plurality of purified water flow pipelines, the sewage flow pipelines are sequentially connected in series before the sewage treatment device to sequentially preheat sewage, and the purified water flow pipelines are sequentially connected after the sewage treatment device to sequentially cool products after the sewage treatment device; the oscillator is arranged between the liquid inlet of the sewage circulating pipeline of the heat exchange device farthest away from the sewage treatment device and the liquid outlet of the purified water circulating pipeline.
9. The recycling treatment system of exhaust gas waste liquid for vehicle aftermarket according to claim 7 or 8,
the device also comprises a pressure reduction separation device which is arranged behind the heat exchange device and in front of the reclaimed water tank, the pressure reduction separation device is connected with a liquid outlet of the purified water circulation pipeline of the heat exchange device so as to perform pressure reduction and gas-liquid separation on a cooled product treated by the sewage treatment device and discharge reclaimed water.
10. The recycling treatment system for exhaust gas waste liquid in vehicle aftermarket according to claim 3,
the spray tower comprises:
the spray head is used for spraying water and/or reclaimed water and is arranged above the spray tower;
the air inlet is used for introducing the waste gas and fully mixing the waste gas with water and/or reclaimed water sprayed by the spray head to obtain the first mixed liquid;
the gas outlet is used for discharging gas which is not compatible with water in the waste gas;
and the liquid outlet is used for discharging the first mixed liquid after the waste gas is compatible with the water.
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