CN110898642A - Energy-saving emission-reducing waste gas treatment system - Google Patents
Energy-saving emission-reducing waste gas treatment system Download PDFInfo
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- CN110898642A CN110898642A CN201911139047.5A CN201911139047A CN110898642A CN 110898642 A CN110898642 A CN 110898642A CN 201911139047 A CN201911139047 A CN 201911139047A CN 110898642 A CN110898642 A CN 110898642A
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Abstract
The embodiment of the invention discloses an energy-saving emission-reducing waste gas treatment system, which is based on a zero-emission framework and comprises: closed cycle device, exhaust purification processing apparatus and energy processing recovery unit, closed cycle device is used for realizing gas circulation, exhaust purification processing apparatus is used for right exhaust in the closed cycle device carries out purification treatment, energy processing recovery unit with closed cycle device and exhaust purification processing apparatus links to each other for carry out energy recovery back to gas of gas vent exhanst gas in the closed cycle device and send into exhaust purification processing apparatus. This scheme possesses cyclic processing, three major key functions of limit purification and gas balance, gaseous adoption cyclic processing, do not exchange with external gaseous phase environment, waste gas comes from the system, get back to the system after the purification processing and go, in the purification processing in-process, purification technology and system configuration optimization, select the most accurate process route and system to different objects and overlap and be equipped with in order to make the treatment effect best, the running cost is reasonable, the price/performance ratio is the highest, because the use of gas balance unit, make in the whole waste gas treatment process, gaseous total volume keeps balanced, realize the zero release from the real meaning.
Description
Technical Field
The embodiment of the application relates to the technical field of waste gas treatment, in particular to an energy-saving and emission-reducing waste gas treatment system.
Background
Along with the acceleration of the urbanization process of China, the living standard of people is continuously improved, the environmental awareness of people is continuously enhanced, the requirements on the ecological environment are higher and higher, the pressure of traditional industrial environment protection upgrading is higher and higher, and the social responsibility of enterprises is stronger and higher.
The fourth industrial revolution started and innovated in the 21 st century is a brand new green industrial revolution, and the essence and the characteristics of the fourth industrial revolution are that the production utilization rate of resources is greatly improved, economic growth is comprehensively decoupled from non-renewable resource elements, and the fourth industrial revolution is decoupled from the gas emission of a carbon dioxide isothermal chamber. From a historical perspective, from an industrial perspective, we clearly realized that the fourth industrial revolution of the world, namely the green revolution, has come. China can catch up with the dawn period and the launch period of the revolution, and is not easy and fortunate.
With the development of the fourth industrial revolution, the industrialization upgrading of China is further accelerated, and the method relates to the fields of wide range of aspects, large influence range, deep touch on various industries, no transfer of the will of people, and huge kinetic energy generated impacts on the industrial production of the whole society and various fields of people' life.
According to the various industrial industries, municipal administration and sewage treatment fields which produce waste gas pollution in the traditional production process, the air pollution is treated by means of dealing with the waste gas pollution in a clear color or dealing with the waste gas pollution, the overall ecological environment is rapidly worsened due to extensive industrial production and wild industrial growth, and the haze area is continuously enlarged, the time is continuously increased, the PM2.5 is slowly reduced, and the local area has a rising and worsening trend. Under the promotion of strong policies of pollution control such as 'strengthening environment ecological civilization construction', the ecological environment is gradually improved, but the treatment of waste gas pollution is still bound by the laggard concept of 'after treatment', and a long distance is left from 'green and clean' production.
Disclosure of Invention
The embodiment of the invention provides an energy-saving emission-reducing waste gas treatment system, and the energy-saving emission-reducing and waste gas circulation treatment system based on a zero emission architecture provides a brand-new thinking mode and a brand-new technical idea, so that on the aspects of treating the traditional industrial production technology and the industrial production technology which is already upgraded or to be upgraded, the coping mode of treating the generated atmospheric environmental pollution thoroughly discards the laggard thinking mode of 'after treatment', radically and thoroughly solves the problems of maximally recycling the wasted energy in the industrial production and even social activities generating the waste gas pollution, and maximally and circularly treats the originally discharged waste gas polluting the environment, the invention of an energy-saving emission-reduction and waste gas circulation treatment system based on a zero emission framework is considered to be a subversion of the existing air pollution prevention concept and is a revolution in the field of air pollution prevention.
The embodiment of the invention provides an energy-saving emission-reducing waste gas treatment system, which comprises: closed cycle device, exhaust purification processing apparatus and energy processing recovery unit, closed cycle device is used for realizing gas circulation, exhaust purification processing apparatus is used for right exhaust in the closed cycle device carries out purification treatment, energy processing recovery unit with closed cycle device and exhaust purification processing apparatus links to each other for carry out energy recovery back to gas of gas vent exhanst gas in the closed cycle device and send into exhaust purification processing apparatus.
Optionally, the exhaust gas purification treatment device includes a pretreatment unit, a purification treatment unit and a gas balance unit, the pretreatment unit is connected to the purification treatment unit, the purification treatment unit is connected to the gas balance unit, and the pretreatment unit is configured to pretreat the exhaust gas using a chemical process and/or a physical process according to at least one of an exhaust gas component, an exhaust gas concentration, an exhaust gas property, a recovery level, a reliability level and an economic value level in the closed-loop circulation device; the purification treatment unit is used for further purifying the gas treated by the pretreatment unit; the gas balance unit is used for consuming the gas generated by the pretreatment unit and the purification treatment unit and supplementing the reduced gas.
Optionally, the pretreatment unit uses a chemical process and/or a physical process to pretreat the exhaust gas, and the pretreatment unit comprises:
the pretreatment unit is used for pretreating the waste gas by at least one of filtration, dust removal, adsorption and concentration, heating and desorption, freezing and regeneration, catalysis and oxidation; and/or
The pretreatment unit pretreats the waste gas by at least one of acid-base neutralization, chemical oxidation, washing absorption, extraction separation and filtering decomposition.
Optionally, the purifying treatment unit is configured to further purify the gas treated by the pretreatment unit, and the purifying treatment unit includes:
purifying the waste gas containing organic components by at least one of adsorption concentration, heating desorption, freezing recovery, adsorption concentration, catalytic combustion, heat storage combustion and biodegradation purification;
and (3) purifying the waste gas containing inorganic components by at least one of biological washing, biological filtration, acid-base washing and chemical oxidation.
Optionally, the gas balancing unit comprises: the gas consumption device is used for eliminating gas increased in the treatment process, the gas supplement device is used for supplementing reduced gas in the treatment process, and the gas quality guarantee device is used for adjusting the temperature, the humidity and the cleanliness of the treated gas.
Optionally, the closed cycle apparatus includes an air inlet, an air outlet and a safety vent valve.
Optionally, the energy processing and recycling device is configured to select a corresponding process route and a corresponding equipment composition for energy recycling according to characteristic attributes of gas exhausted from the gas outlet, where the characteristic attributes of the gas include a temperature value, a humidity value, a gas corrosion level, a recycling level, a climate level of a region where the gas is located, and at least one of a temperature value, a humidity value, and a cleanliness level of a corresponding recycled gas.
Optionally, the energy processing and recycling device is specifically configured to:
any one or more devices of a heat exchanger, a water chilling unit, a heat pump and a magnetic heat steam generator are adopted for energy recovery, wherein the recovered energy comprises energy corresponding to any one or more substances of hot water, low-pressure steam or high-temperature heat conduction oil.
Optionally, the energy-saving emission-reduction exhaust gas treatment system further includes: the device comprises an exhaust fan and a detection control unit, wherein the detection control unit is used for detecting and controlling the components and the concentration of the gas to be detected, and the gas to be detected comprises waste gas in the closed circulation device.
Optionally, the energy-saving emission-reduction exhaust gas treatment system further includes: the system control unit comprises at least one of a field control device, a remote control device, an application App or a cloud platform device.
The energy saving and emission reduction exhaust treatment system that this scheme provided, possess the circulation and handle, limit purification and three major key functions of gas balance, gaseous circulation that adopts is handled, do not exchange with external gaseous phase environment, waste gas comes from the system, get back to the system again after the purification treatment and go, in the purification treatment process, purification technology and system configuration optimization, select the most accurate process route and system to make the treatment effect best to different objects, the running cost is reasonable, the price/performance ratio is the highest, because the use of gas balance unit, make in the whole exhaust treatment process, gaseous total volume keeps balanced.
Drawings
Fig. 1 is a structural block diagram of a "zero emission architecture" of an energy-saving emission-reduction exhaust gas treatment system according to an embodiment of the present invention;
fig. 2 is a block diagram showing a configuration of an exhaust gas purification apparatus according to an embodiment of the present invention;
fig. 3 is a block diagram of a processing unit 3 according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a thermal energy processing and recycling apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a cold energy processing and recycling device according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a conventional printing industry exhaust treatment module;
fig. 7 is a schematic structural diagram of an energy-saving emission-reducing exhaust gas treatment system based on a zero-emission architecture for screen printing according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another energy-saving emission-reducing exhaust gas treatment system for screen printing based on a zero-emission architecture, provided by an embodiment of the invention;
fig. 9 is a schematic structural diagram of another energy-saving emission-reducing exhaust gas treatment system for screen printing based on a zero emission architecture according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad invention. It should be further noted that, for convenience of description, only some structures, not all structures, relating to the embodiments of the present invention are shown in the drawings.
This scheme discloses an energy saving and emission reduction exhaust treatment system, its suitable scene includes:
air displacement type spaces, such as a garbage unloading hall, a garbage compression transfer station, a garbage sorting production line, sewage treatment and the like, and all production workshops and spaces needing ventilation and air exchange;
air displacement type production system: fermenting compost of feed, food, sludge (feces and garbage), making shoes, spraying paint (spraying), drying and the like.
The main coping markets include:
the energy-saving emission-reducing market and the waste gas treatment market can also be classified into an energy-saving emission-reducing and waste gas treatment comprehensive market, namely, the waste gas pollution is eliminated in the energy-saving emission-reducing process, and the energy consumption in the production process is reduced while the waste gas pollution is eliminated.
The scheme realizes the following three major elements:
and (3) circulating treatment: the gas must be circularly treated, and can not be exchanged with the external gas phase environment, and the waste gas comes from the system, is purified and then returns to the system, and the process is repeated in cycles and is circularly reciprocated. Without circular processing, a 'zero emission architecture' cannot be realized;
limiting purification: the optimization of the gas purification technology and system configuration is required, and the most accurate process route and system collocation are selected aiming at different objects, so that the treatment effect is optimal, the operation cost is reasonable, and the cost performance is highest. The basic requirement of zero emission architecture cannot be met if the limit purification cannot be achieved;
gas balance: the total volume of the gas in the whole treatment process is not increased or reduced, the redundant gas is removed by adopting a corresponding technology, the consumed gas is supplemented by adopting a corresponding technology, what is lacked, what is supplemented, what is generated and what is eliminated. The gas balance cannot be realized, and finally, a zero emission framework cannot be really achieved.
The present solution will now be described in detail with reference to the system.
Fig. 1 is a structural block diagram of a "zero emission architecture" of an energy-saving emission-reduction exhaust gas treatment system provided in an embodiment of the present invention, and as shown in fig. 1, a specific product is obtained after a production raw material is treated by a production unit 10, where the energy-saving emission-reduction exhaust gas treatment system includes: the system comprises a production unit 10, an air inlet 11 and an air outlet 12, an energy treatment recycling device 2, an air inlet 21 and an air outlet 22, an exhaust gas purification treatment device 3, an air inlet 31 and an air outlet 32, wherein the closed-loop circulation device 1 consists of the production unit 10, the air inlet 11, the air outlet 12, a pressure relief safety valve (namely a safety discharge valve) 13, and various communicated pipelines, the air inlet, the air outlet, the energy treatment recycling device 2 and the exhaust gas purification treatment device 3, wherein the closed-loop circulation device 1 is used for realizing gas circulation so as to complete closed-loop circulation and safe and stable operation of the whole system, the exhaust gas purification treatment device 3 is used for purifying exhaust gas (such as the exhaust gas generated by the production unit 10) in the closed-loop circulation device, and the gas meeting the quality requirement of the recycled gas is sent back to the initial end of the whole system again so as to realize the final, the energy processing and recovering device 2 is connected with the closed-loop circulating device (namely the exhaust port 12 of the production unit 10) and the waste gas purifying and treating device 3, and is used for recovering energy of gas exhausted from the exhaust port in the closed-loop circulating device and then sending the gas into the waste gas purifying and treating device 3, and the energy processing and recovering device 2 is provided with an energy (heat or cold) processing, recovering and utilizing device, can effectively process the gas without recovery value, has recovery value, and recovers and utilizes the energy exhausted to the environment along with the waste gas.
In one embodiment, the exhaust gas purification treatment device comprises a pretreatment unit, a purification treatment unit and a gas balance unit, wherein the pretreatment unit is connected with the purification treatment unit, the purification treatment unit is connected with the gas balance unit, and the pretreatment unit is used for pretreating the exhaust gas by using a chemical process and/or a physical process according to at least one of the exhaust gas composition, the exhaust gas concentration, the exhaust gas property, the recovery grade, the reliability grade and the economic value grade in the closed-loop circulation device; the purification treatment unit is used for further purifying the gas treated by the pretreatment unit; the gas balance unit is used for consuming the gas generated by the pretreatment unit and the purification treatment unit and supplementing the reduced gas.
Fig. 2 is a block diagram of an exhaust gas purification treatment device according to an embodiment of the present invention, as shown in fig. 2, the waste gas purification treatment device comprises three treatment units, namely a treatment unit 1(301), a treatment unit 2(302) and a treatment unit 3(303), which respectively correspond to a pretreatment unit, a purification treatment unit and a gas balance unit, wherein the treatment unit 1 and the treatment unit 2 are connected through a communication pipeline 3012, the treatment unit 2 and the treatment unit 3 are connected through a communication pipeline 3023, the treatment unit 1 is connected with waste gas generated by a waste gas generation space 300, the waste gas generation space 300 is connected with the treatment unit 1 through a pipeline 3001, the exhaust gas generating space 300 includes an exhaust port 3010 and an intake port 331, the processing unit 1 includes an intake port 3011 and an exhaust port 3012, the processing unit 2 includes an intake port 3021 and an exhaust port 3022, and the processing unit 3 includes an intake port 3031 and an exhaust port 335.
Fig. 3 is a schematic block diagram of a processing unit 3 according to an embodiment of the present invention, and as shown in fig. 3, the processing unit 3 (i.e., a gas balancing unit) includes a gas supplementing device 3031, a gas eliminating device 3032, a temperature adjusting device 30331, a humidity adjusting device 30332, a cleanliness processing device 30333, and a suction fan 3034.
Wherein the pretreatment unit (i.e., the treatment unit 1) pretreats the exhaust gas using a chemical process and/or a physical process, including: the pretreatment unit is used for pretreating the waste gas by at least one of filtration, dust removal, adsorption and concentration, heating and desorption, freezing and regeneration, catalysis and oxidation; and/or the pretreatment unit pretreats the exhaust gas by at least one of acid-base neutralization, chemical oxidation, washing absorption, extraction separation and filter decomposition. The pretreatment unit carries out pretreatment on the waste gas according to the components, concentration, properties, recycling necessity, technical reliability and economic value of the waste gas, and aims to reduce the treatment load and difficulty of the subsequent process for the ultimate purification of the waste gas and meet the condition of recycling. The adopted process comprises the physical treatment process (such as filtration and dust removal, adsorption, concentration, heating, desorption, freezing and regeneration, catalysis and oxidation), the chemical treatment process (such as acid-base neutralization, chemical oxidation, washing and absorption, extraction and separation, filtration and decomposition) and the like.
Wherein, purification unit is used for selecting accurate technology to handle to the waste gas: for waste gas containing organic components (such as various VOC and the like), adsorption concentration, heating desorption and freezing recovery are adopted; or/and adsorbing (activated carbon (carbon fiber), macroporous resin, and rotary wheel) for concentration, heating for desorption, and performing catalytic combustion (RCO); or/and regenerative thermal combustion (RTO); performing biodegradation purification treatment; the waste gas containing inorganic components (such as sulfur, nitrogen and the like) is purified by adopting the processes of biological washing, and/or biological filtration (trickling filtration), and/or acid-base washing, and/or chemical oxidation and the like.
The gas balance unit is used for performing a quality assurance treatment process required by a circulation process on waste gas, and comprises the steps of treating gas generated (increased) when a reaction (biological reaction or chemical reaction) occurs in the treatment process of the pretreatment unit and the purification treatment unit, supplementing consumed gas (reduced), and treating the gas quality when the gas enters the production system after being treated by the purification treatment unit in a circulation mode, so that the stable and safe operation of the whole production system is guaranteed. Specifically, the gas consuming apparatus 3031 is configured to add different types, characteristics and properties of gas to the reaction process of the processing unit 2, and perform processing by using corresponding process technologies, for example, carbon dioxide generated in the microbial decomposition process and a chemical absorption process, and the reaction formula is:
2R2O2+2CO2＝R2CO3+O2
the gas supplementing device 3031 is configured to supplement the consumed oxygen by the oxygen generating device aiming at the oxygen consumed in the reaction process of the processing unit 1 and the processing unit 2, so as to keep the balance of the total gas amount of the whole system.
The temperature adjusting device 30331, the humidity adjusting device 30332 and the cleanliness processing device 30333 are used for ensuring that the quality of the gas treated by the waste gas purification processing device meets the quality requirement of the production system.
In the process of gas treatment by the pretreatment unit, the purification treatment unit and the gas balance unit, all units are not independent and completely separated from each other, the respective process technology and equipment composition select an optimal configuration principle mainly according to the properties and characteristics of waste gas, and the waste gas which needs to be cooled and dehumidified and then heated is recycled for high temperature and high humidity containing dust; for the waste gas containing VOC organic components, the main aim of the waste gas purification treatment device is to adopt a physical, chemical or biological degradation process to remove the residual organic components in the gas to the maximum extent after the VOC components in the waste gas are separated and recovered to the maximum extent with the energy treatment and recovery device, so that the waste gas meets the quality requirement of recycling; for the waste gas which generally needs to be purified (such as the waste gas generated in the air replacement processes of various domestic sewage and industrial sewage treatment, garbage compression, sorting, compost fermentation and incineration power generation pretreatment, sludge drying, kitchen waste treatment, workshop ventilation and the like), the waste gas purification treatment device mainly aims at pure waste gas treatment and ensures that the quality of the treated gas meets the requirement of recycling.
In one embodiment, the energy processing and recycling device is used for selecting a corresponding process route and equipment composition for energy recycling according to characteristic attributes of gas exhausted from the gas exhaust port, wherein the characteristic attributes of the gas comprise a temperature value, a humidity value, a gas corrosion grade, a recycling grade, a regional climate grade and at least one of a corresponding temperature value, a humidity value and a cleanliness grade of recycled gas.
Fig. 4 is a schematic structural diagram of a thermal energy processing and recycling device according to an embodiment of the present invention. Such as
As shown in fig. 4, the energy processing and recovering device 2 comprises a filter, a heat regenerator, an evaporator and a condenser, wherein a compressor 232 and an expansion valve 234 are connected between the evaporator 231 and the condenser 233 for processing and recovering the heat energy.
Fig. 5 is a schematic structural diagram of a cold energy processing and recycling device according to an embodiment of the present invention. As shown in fig. 5, the energy processing and recovering device 2 comprises a filter, a heat regenerator, a heat exchanger and a water chilling unit, and is used for processing and recovering cold energy.
The energy treatment and recovery device in the scheme is composed of process routes and equipment of energy recovery and utilization devices in different forms, wherein the energy recovery and utilization devices are configured according to the characteristics of energy in waste gas. The energy recycling device adopts an optimized energy recycling process and matched optimized system equipment according to the comprehensive factors of the temperature, the humidity, the gas corrosivity, the recycling value, the climate characteristics of the region where the gas is generated by the production system, the temperature, the humidity, the cleanliness of the recycled gas and the like.
For waste gas with high temperature, high humidity and certain heat (a production system is accompanied with a heating process, such as each process unit of feed production, drying and spray drying industries, various food processing industries and the like), the energy recycling process of the waste gas adopts heat exchangers in different forms, or/and water chilling units, or/and heat pump (or/and high temperature heat pump) technologies, or/and magnetic heat steam generator technologies, and the recovered heat is hot water, low-pressure steam or high-temperature heat conduction oil. The moisture contained in the gas is condensed and separated out in the process of temperature reduction and heat exchange and is discharged outside the environment. If the circulating gas needs to be heated, the recycled gas can be heated to a set temperature by the aid of regenerative or heat exchange technical equipment, so that the recycled heat is partially recycled into a production system, and redundant heat needs to be comprehensively utilized by combining with the whole enterprise and the surrounding environment.
For waste gas (production system accompanied with air conditioning process, such as silk-screen printing, shoe making, leather tanning, surface treatment and other industries) with temperature lower than ambient temperature and containing certain energy (cold energy) in summer, the energy recycling process adopts a heat exchanger for heat exchange, so that the heat exchange is carried out between the circulated gas and the gas which is pumped out and needs to be purified, and the waste of energy discharge is reduced to the maximum extent. Meanwhile, corresponding water chilling units or/and air conditioning units or/and heat pump air conditioning units are configured to supplement energy (reduce temperature) for the recycled gas, so that the recycled gas can meet the temperature requirement of the recycled gas. Traditional printing exhaust-gas treatment is as shown in fig. 5, and fig. 5 is a traditional printing trade exhaust-gas treatment module structure schematic diagram, and exhaust treatment device handles silk screen printing workshop waste gas, carries out emission up to standard after up to standard. Fig. 7 is a schematic structural diagram of an energy saving and emission reduction exhaust gas treatment system based on a zero-emission architecture for screen printing, which is provided by an embodiment of the present invention, and is configured to treat high-concentration organic exhaust gas, and select a direct freezing recovery and waste recycling treatment process for the high-concentration organic exhaust gas, as shown in fig. 7, specifically:
low-temperature (about 26 degrees) high-concentration organic waste gas generated in an air conditioner production workshop is subjected to heat exchange with treated high-temperature gas circulated, so that energy (cold energy) in air conditioner cold air discharged from the workshop is recovered, and when the temperature of the air conditioner in the workshop cannot be reached, the circulating return air temperature is adjusted to about 26 degrees through a cold energy exchanger, so that the waste of the cold energy is reduced to the maximum extent;
the organic waste gas after cold recovery directly enters a refrigeration recovery device, the organic components are refrigerated and liquefied according to the characteristics of different organic waste gases, the organic components are converted into liquid from gaseous state, the liquid waste gas enters a liquid storage tank and then returns to a production workshop for use, or the liquid waste gas is sold to a professional recovery company as heterocyclic organic components, so that the production cost is reduced;
a small amount of non-condensable gas (or non-condensable gas) exists in the waste gas after the organic components are recovered, the waste gas enters a waste gas circulating treatment device for further purification, a biological purification system or an ultraviolet light catalytic purification system or other purification processes can be selected as the process of the waste gas circulating treatment device, the gas after further purification returns to a production workshop through returning cold air, and the circulation is repeated.
Fig. 8 is a schematic structural diagram of another energy-saving emission-reduction exhaust gas treatment system for screen printing based on a zero-emission architecture, according to an embodiment of the present invention, and a cyclic treatment process is selected for low-concentration organic exhaust gas without recycling value. As shown in fig. 8, specifically:
the low-temperature (about 26 ℃) low-concentration organic waste gas generated in an air conditioner production workshop is subjected to heat exchange with treated high-temperature gas circulated back through a heat exchanger (a recooling device) to recover energy (cold quantity) in air conditioner cold air discharged from the workshop, and when the temperature of the air conditioner cold air cannot reach the temperature of the air conditioner in the workshop, the temperature of the circulated return air is adjusted to about 26 ℃ through a cold quantity exchanger, so that the waste of the cold quantity is reduced to the maximum extent;
the low-concentration organic waste gas which is not recovered after cold recovery directly enters a waste gas circulation treatment device for further purification, the process of the waste gas circulation treatment device can select a biological purification system, also can select an ultraviolet light catalytic purification system or other purification processes, and the gas after further purification returns to a production workshop through returning cold air and then returns to the production workshop to circulate.
The cold energy exchanger provides cold energy, can select the cooling water set, and the cooling water set provides required cold energy for the cold energy exchanger through freezing the storage water tank, and the cooling water set carries out the heat exchange through the cooling tower, realizes normal stable operation.
Fig. 9 is a schematic structural diagram of another energy-saving emission-reduction exhaust gas treatment system for screen printing based on a zero-emission architecture according to an embodiment of the present invention, and for organic exhaust gas with a certain recovery value in medium and low concentrations, an organic exhaust gas adsorption regeneration refrigeration recovery and exhaust gas circulation treatment process is selected, as shown in fig. 9, specifically:
the low-temperature (about 26 ℃) low-concentration organic waste gas generated in an air conditioner production workshop is subjected to heat exchange with treated high-temperature gas circulated back through a heat exchanger (a recooling device) to recover energy (cold quantity) in air conditioner cold air discharged from the workshop, and when the temperature of the air conditioner cold air cannot reach the temperature of the air conditioner in the workshop, the temperature of the circulated return air is adjusted to about 26 ℃ through a cold quantity exchanger, so that the waste of the cold quantity is reduced to the maximum extent;
the organic waste gas after cold recovery directly enters an adsorption concentration device, when a first group of adsorption tanks of the adsorption concentration device are saturated in adsorption, the waste gas enters a second group of adsorption tanks, the first group of adsorption tanks begin to be heated and regenerated, the hot air heats and blows off the organic components in the adsorption tanks saturated in adsorption, the organic components enter a refrigeration recovery device, in the refrigeration recovery device, the organic components are refrigerated and liquefied according to the characteristics of different organic waste gases, the organic components are converted into liquid from gas, the liquid waste gas enters a liquid storage tank and then returns to a production workshop for use, or the liquid waste gas is sold to a professional recovery company as heterocyclic organic components, and the production cost is reduced;
and a small amount of organic components are contained in the gas adsorbed by the adsorption tank, and then the gas enters a waste gas circulation treatment device for further purification, wherein the process of the waste gas circulation treatment device can select a biological purification system, also can select an ultraviolet light catalytic purification system or other purification processes, and the gas after further purification returns to a production workshop through cold air and is circulated and reciprocated.
In one embodiment, the "zero emission architecture" of the energy saving and emission reduction exhaust gas treatment system further includes: the device comprises an exhaust fan and a detection control unit, wherein the detection control unit is used for detecting and controlling the components and the concentration of the gas to be detected, and the gas to be detected comprises waste gas in the closed circulation device.
In one embodiment, the "zero emission architecture" of the energy saving and emission reduction exhaust gas treatment system further includes: the system control unit comprises at least one of a field control device, a remote control device, an application App or a cloud platform device. And the system control unit is used for controlling the whole energy-saving emission-reducing waste gas treatment system and each unit and node.
The zero emission framework of the energy-saving emission-reducing waste gas treatment system comprises a closed circulation structure formed by the whole air displacement type production system and an air displacement type space, an energy treatment and recycling system contained in waste gas and a waste gas circulation treatment system. The closed cycle structure formed by the air replacement type production system and the air replacement type space comprises an inlet and outlet pipeline, an air inlet, an air outlet and an emergency safe discharge (pressure relief) valve which are connected between an inlet and an outlet of the production system; the energy processing and recycling system is provided with an energy (heat or cold) processing, recycling and utilizing device, can effectively process the energy without recycling value, and can recycle and utilize the energy discharged to the environment along with the waste gas; the waste gas circulating treatment system carries out ultimate purification on waste gas which pollutes the environment by adopting a recycling and purifying technology with optimized configuration, so as to meet the quality requirement of the recycled gas; the purified gas meeting the requirement of the circulating gas is sent back to the initial end of the whole system again, so that the final aim of zero emission of waste gas is realized.
The invention relates to a zero emission framework for energy conservation, emission reduction and waste gas treatment, which creatively provides a brand-new zero emission treatment framework for an air displacement type production system which discharges a large amount of waste gas pollutants and energy. The environmental benefit, the social benefit and the economic benefit complement each other.
It should be noted that, in the embodiment of the energy-saving emission-reduction exhaust gas treatment system device, the units and modules included in the embodiment are only divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the embodiment of the invention.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will appreciate that the embodiments of the present invention are not limited to the specific embodiments described herein, and that various obvious changes, adaptations, and substitutions are possible, without departing from the scope of the embodiments of the present invention. Therefore, although the embodiments of the present invention have been described in more detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments, and many other equivalent embodiments may be included without departing from the concept of the embodiments of the present invention, and the scope of the embodiments of the present invention is determined by the scope of the appended claims.
Claims (10)
1. Energy saving and emission reduction exhaust gas treatment system, its characterized in that, the system includes: closed cycle device, exhaust purification processing apparatus and energy processing recovery unit, closed cycle device is used for realizing gas circulation, exhaust purification processing apparatus is used for right exhaust in the closed cycle device carries out purification treatment, energy processing recovery unit with closed cycle device and exhaust purification processing apparatus links to each other for carry out energy recovery back to gas of gas vent exhanst gas in the closed cycle device and send into exhaust purification processing apparatus.
2. The energy-saving emission-reducing exhaust gas treatment system according to claim 1, wherein the exhaust gas purification treatment device comprises a pretreatment unit, a purification treatment unit and a gas balance unit, the pretreatment unit is connected with the purification treatment unit, the purification treatment unit is connected with the gas balance unit, and the pretreatment unit is used for pretreating the exhaust gas by using a chemical process and/or a physical process according to at least one of exhaust gas composition, exhaust gas concentration, exhaust gas property, recovery grade, reliability grade and economic value grade in the closed-loop circulation device; the purification treatment unit is used for further purifying the gas treated by the pretreatment unit; the gas balance unit is used for consuming the gas generated by the pretreatment unit and the purification treatment unit and supplementing the reduced gas.
3. The energy-saving emission-reducing exhaust gas treatment system according to claim 2, wherein the pretreatment unit pretreats the exhaust gas using a chemical process and/or a physical process comprises:
the pretreatment unit is used for pretreating the waste gas by at least one of filtration, dust removal, adsorption and concentration, heating and desorption, freezing and regeneration, catalysis and oxidation; and/or
The pretreatment unit pretreats the waste gas by at least one of acid-base neutralization, chemical oxidation, washing absorption, extraction separation and filtering decomposition.
4. The energy-saving emission-reducing exhaust gas treatment system according to claim 2, wherein the purification treatment unit is configured to further purify the gas treated by the pretreatment unit, and the purification treatment unit comprises:
purifying the waste gas containing organic components by at least one of adsorption concentration, heating desorption, freezing recovery, adsorption concentration, catalytic combustion, heat storage combustion and biodegradation purification;
and (3) purifying the waste gas containing inorganic components by at least one of biological washing, biological filtration, acid-base washing and chemical oxidation.
5. The energy saving and emission reduction exhaust gas treatment system according to claim 2, wherein the gas balance unit includes: the gas consumption device is used for eliminating gas added in the treatment process, the gas supplement device is used for supplementing reduced gas in the treatment process, and the gas quality guarantee device is used for adjusting the temperature, the humidity and the cleanliness of the treated gas.
6. The energy saving and emission reduction exhaust gas treatment system according to claim 1, wherein the closed cycle device includes an air inlet, an air outlet, and a safety vent valve.
7. The energy-saving emission-reducing exhaust gas treatment system according to claim 1, wherein the energy treatment recovery device is configured to select a corresponding process route and equipment composition for energy recovery according to characteristic attributes of gas exhausted from the exhaust port, and the characteristic attributes of the gas include at least one of a temperature value, a humidity value, a gas corrosion grade, a recycling grade, a climate grade of a region where the gas is located, and a corresponding temperature value, a humidity value, and a cleanliness grade of recycled gas.
8. The energy-saving emission-reducing exhaust gas treatment system according to claim 7, wherein the energy treatment recovery device is specifically configured to:
any one or more devices of a heat exchanger, a water chilling unit, a heat pump and a magnetic heat steam generator are adopted for energy recovery, wherein the recovered energy comprises energy corresponding to any one or more substances of hot water, low-pressure steam or high-temperature heat conduction oil.
9. The energy saving and emission reduction exhaust gas treatment system according to any one of claims 1 to 8, further comprising: the device comprises an exhaust fan and a detection control unit, wherein the detection control unit is used for detecting and controlling the components and the concentration of the gas to be detected, and the gas to be detected comprises waste gas in the closed circulation device.
10. The energy saving and emission reduction exhaust gas treatment system according to any one of claims 1 to 8, further comprising: the system control unit comprises at least one of a field control device, a remote control device, an application App or a cloud platform device.
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| CN201911139047.5A CN110898642A (en) | 2019-11-20 | 2019-11-20 | Energy-saving emission-reducing waste gas treatment system |
| PCT/CN2019/129845 WO2021098019A1 (en) | 2019-11-20 | 2019-12-30 | Energy-conservation emission-reduction waste gas treatment system |
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| CN101284201A (en) * | 2008-06-02 | 2008-10-15 | 北京云辰天环保科技有限公司 | Organic waste gas treatment process without secondary pollution |
| US20130209338A1 (en) * | 2010-07-15 | 2013-08-15 | Quadrogen Power Systems, Inc. | Integrated biogas cleaning system to remove water, siloxanes, sulfur, oxygen, chlorides and volatile organic compounds |
| CN108079738A (en) * | 2018-01-03 | 2018-05-29 | 王理 | The circulating waste gas processing method of energy conservation and environmental protection applied to lacquering and stoving varnish technique |
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