CN111495180A - Final-stage integrated intelligent treatment process for harmful waste gas - Google Patents
Final-stage integrated intelligent treatment process for harmful waste gas Download PDFInfo
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- CN111495180A CN111495180A CN202010338296.3A CN202010338296A CN111495180A CN 111495180 A CN111495180 A CN 111495180A CN 202010338296 A CN202010338296 A CN 202010338296A CN 111495180 A CN111495180 A CN 111495180A
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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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
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
The invention relates to a new final-stage integrated intelligent treatment process for harmful waste gas. The invention comprises a preposed catalytic oxidation unit and a postposition high-temperature incineration oxidation unit, wherein the preposed catalytic oxidation unit is filled with more than 2 sections of catalysts with different properties and is provided with a circulating fan to realize multiple times of circulating catalytic oxidation, and harmful waste gas which does not reach the standard after being treated by the preposed catalytic oxidation unit is subjected to high-temperature incineration oxidation by the incineration oxidation unit and then is discharged after reaching the standard. The invention integrates catalytic oxidation and incineration oxidation, and the conversion efficiency of the treated harmful waste gas is up to more than 99%. The invention can realize the independent or combined operation of the preposed catalytic oxidation and the postposition incineration oxidation according to the different properties and compositions of harmful waste gas. The invention has the advantages of continuous heat exchange, safe essence, high efficiency, energy conservation, compact structure, simple and convenient operation and convenient realization of remote artificial intelligence and unmanned control.
Description
Technical Field
The invention relates to the field of energy conservation and environmental protection, in particular to a final-stage discharge integrated intelligent treatment process for harmful waste gas in industry, catering, medical treatment and health, resident life and the like.
Background
With the continuous promotion of the industrialization process of China and the increase of urban population, the situation of air pollution prevention and control of China is becoming more urgent and severe, firstly, industrial Volatile Organic Compounds (VOCs) seriously affect the quality of environmental air, and infectious viruses and carcinogenic smoke in medical and catering industries cause serious damage to the health of people. Various laws and regulations are set up for the national environmental protection department, and all related enterprises, universities and scientific research institutes also actively seek solutions. The method can be used for transmitting carcinogenic flue gas emitted by infection sources, catering and residents which need to be isolated in a medical system through air, and has no specialized treatment method at present except special medical waste treatment or industrial high-temperature combustion, so that the method only exemplifies the emission treatment of harmful waste gas VOCs.
The current treatment methods and techniques for industrial VOCs are mainly classified into the following 2 categories:
1. and (4) a recovery method. The recovery method mainly recovers the available part in the discharged waste gas by means of direct condensation, separation, solvent absorption, desorption, active substance adsorption, regeneration, membrane separation and the like. The method has strict requirements on condensation temperature, absorption solvent, adsorbent and membrane material due to different types and condensation concentrations of VOCs contained in different discharged waste gases, has strong pertinence, needs secondary treatment mostly, hardly achieves primary treatment standard discharge, needs to be provided with terminal treatment equipment, and is generally used for pre-treatment.
2. A combustion method. The combustion method is to oxidize VOCs waste gas into CO at high temperature by oxygen-enriched oxidation reaction2And H2And O. The combustion method currently comprises
Catalytic combustion (also called catalytic oxidation): the oxidation reaction is carried out under the action of a catalyst, and VOCs waste gas is converted into CO under the condition of no open fire2And H2O has the advantages of low temperature energy conservation, high conversion rate, no need of secondary treatment of the discharged tail gas and the like, but has the problems of limited catalyst coverage, volatility, short service life, high operation difficulty, overproof tail gas and the like when being used for final treatment.
Direct combustion (also known as incineration): adding a certain amount of combustible medium into the waste gas with the VOCs content reaching the combustible condition or the waste gas with the VOCs content not meeting the combustible condition in the discharged waste gas, adding enough oxygen enrichment, and burning under the condition of high temperature and open fire to quickly oxidize the VOCs into CO2And H2And O. This method is most representative of a foreign technology called RTO (regenerative thermal oxidizer). So-called RTO (regenerative thermal combustion) is simply a process that relies on a heat storage material to recover the heat of the combusted exhaust gas and then heats the inlet unburned exhaust gas by direct heat transfer. This process is generally accomplished by continuously switching over 9 or more large inlet valve groups. RTO (regenerative thermal oxidizer) has the advantages of complete oxidation combustion, high thermal efficiency and no secondary pollution, and is generally used for the final treatment of harmful waste gas VOCs. However, in the practical process of the method, the operation is relatively complex, the operation and maintenance cost is high, the occupied area is large, the process is uncontrollable and the tail gas does not reach the standard due to the faults such as valve switching leakage and the like, the device can explode to cause safety accidents, and unmanned intelligent operation is difficult to realize due to the fact that the device cannot guarantee the intrinsic safety.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a new final-stage integrated intelligent treatment process for harmful waste gas, which has the advantages of high conversion efficiency, wide coverage, good safety and reliability, stable operation and long service life of a catalyst.
The invention is realized by the following steps: a new process for final-stage integrated intelligent treatment of harmful waste gas comprises a preposed catalytic oxidation unit and a high-temperature incineration oxidation unit which are connected with each other; the method comprises the following steps:
(1) harmful waste gas is heated to reaction temperature by a heat exchanger in the preposed catalytic oxidation unit and enters a catalyst bed layer, and the harmful waste gas and oxygen in the air undergo oxidation reaction under the catalytic action of the catalyst to produce harmless CO2And H2And O, the gas reaching the national mandatory emission standard is discharged through a flue.
(2) When the activity of the catalyst bed begins to decline, harmful waste gas which does not reach the national standard after catalytic oxidation is recycled in the preposed catalytic oxidation unit, the recycled waste gas enters the high-temperature incineration oxidation unit for high-temperature incineration, and the waste gas is discharged after the waste gas reaches the national standard after the waste gas is incinerated.
The advanced catalytic oxidation unit comprises a separator (1), a circulating fan (2), a low-temperature heat exchanger, an electric heater, a catalytic reactor and a water cooler; the high-temperature oxidation incineration unit comprises an incineration oxidation furnace; the separator is connected with a circulating fan, the circulating fan is connected with a low-temperature heat exchanger, the low-temperature heat exchanger is respectively connected with an electric heater and a water cooler, the electric heater is connected with a catalytic reactor, and the catalytic reactor is connected with an incineration oxidation furnace and the low-temperature heat exchanger;
(1) firstly, efficiently separating fog-shaped liquid drops in the waste gas by a separator for recycling, then pumping the separated harmful waste gas by a circulating fan, and feeding the separated harmful waste gas into a low-temperature heat exchanger, and preliminarily heating the harmful waste gas by the low-temperature heat exchanger; then heating the waste gas to a catalytic reaction temperature by an electric heater, entering a catalytic reactor, and finishing catalytic oxidation reaction of harmful waste gas in the catalytic reactor filled with a catalyst; catalytic oxidation to produce harmless CO2And H2And O, after the gas reaches the national mandatory discharge standard, the gas is discharged after being cooled by a low-temperature heat exchanger.
(2) When the activity of the catalyst in the catalytic reactor begins to decline, the waste gas which does not reach the national standard after the catalytic oxidation reaction of the catalytic reactor enters a circulating fan for continuous recirculation after passing through a low-temperature heat exchanger and a water cooler, and the circulated harmful waste gas enters a high-temperature incineration oxidation furnace, reaches the national standard after being incinerated and oxidized at high temperature by the incineration oxidation furnace, and is discharged.
The further optimization scheme is that the incineration oxidation furnace is connected with a high-temperature water tube boiler for recovering high-level energy heat generated steam after oxidation.
The further optimization scheme is that the circulating fans are a plurality of circulating fans which are arranged side by side so as to improve the power for pumping harmful waste gas; the electric heater is a plurality of electric furnaces installed side by side to rapidly heat harmful exhaust gas.
The further optimized scheme is that the temperature of the catalytic oxidation reaction of harmful waste gas in the catalytic reactor is 200-500 ℃.
The further optimization scheme is that the incineration reaction temperature of harmful waste gas in the incineration oxidation furnace is 600-900 ℃.
The catalytic reactor comprises two or more sections of catalysts with different performances, low-temperature gas led out by the circulating fan enters any two adjacent sections of catalysts to cool and shock the temperature of the reacted gas so as to prevent the temperature rise of the catalytic bed from being too high, thereby protecting the activity of the catalysts and prolonging the service life of the catalysts.
The further optimization scheme is that the amount of the waste gas entering the incineration oxidation furnace is the same as the amount of the harmful waste gas supplied to the separator.
The further optimization scheme is that intelligent electronic elements are mounted on the components of the preposed catalytic oxidation unit and the high-temperature oxidation incineration unit to realize intelligent automatic operation.
The final-stage integrated intelligent treatment new process for harmful waste gas has the following advantages: the invention has the advantages of high conversion efficiency, wide coverage, good safety and reliability, stable operation and prolonged service life of the catalyst.
The invention relates to a new final-stage integrated intelligent treatment process for harmful waste gas, which is a catalytic oxidation integrated design; the conversion efficiency of the treated waste gas is as high as 99 percent; the catalysis has saved the energy for burning, and burning provides heat and assurance for the catalysis, and after catalytic oxidation handles, unqualified harmful waste gas recycles, reduces the input of the outside air of device, and the produced heat energy of make full use of catalytic oxidation has prolonged the engineering life of device moreover. The high-temperature incineration oxidation furnace can run in a self-heating way during catalytic oxidation and can be stopped when the requirement of environmental protection emission can be met. The invention has the advantages of good intrinsic safety and reliability and stable continuous heat exchange operation; energy-saving and efficient, has compact structure, occupies less space, is simple and convenient to operate, and is convenient for realizing artificial intelligence and unmanned control.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a flow chart of the final-stage integrated intelligent harmful waste gas treating process.
FIG. 2 is a block diagram of the new integrated intelligent harmful exhaust gas treatment process.
FIG. 3 is a block diagram of the new integrated intelligent harmful exhaust gas treatment process.
The symbols in the drawings illustrate that: 1. the system comprises a separator, 2, a circulating fan, 3, a low-temperature heat exchanger, 4, an electric heater, 5, a catalytic reactor, 6, an incineration oxidation furnace, 7, a water cooler, 8 and a high-temperature water pipe boiler.
Detailed Description
The present invention will be described in detail with reference to specific examples.
The specific implementation mode is as follows: a new process for final-stage integrated intelligent treatment of harmful waste gas comprises a preposed catalytic oxidation unit and a high-temperature incineration oxidation unit which are connected with each other; the method comprises the following steps:
(1) harmful waste gas is heated to reaction temperature by a heat exchanger in the preposed catalytic oxidation unit and enters a catalyst bed layer, and the harmful waste gas and oxygen in the air undergo oxidation reaction under the catalytic action of the catalyst to produce harmless CO2And H2O, the gas is discharged through a flue after reaching the national mandatory discharge standard;
(2) when the activity of the catalyst in the catalyst bed begins to decline in the later use period, the harmful waste gas after catalytic oxidation cannot reach the national emission standard, the waste gas after catalytic oxidation circulates in the front-mounted catalytic oxidation unit, the circulated harmful waste gas enters the high-temperature incineration oxidation unit for high-temperature incineration, and the harmful waste gas after incineration reaches the national standard and is discharged through the flue.
As shown in figure 1, the invention can install intelligent electronic elements on each component of the preposed catalytic oxidation unit and the high-temperature incineration oxidation unit to realize intelligent automatic operation. The preposed catalytic oxidation unit comprises a separator 1, a circulating fan 2, a low-temperature heat exchanger 3, an electric heater 4, a catalytic reactor 5 and a water cooler 7; the high-temperature incineration oxidation unit comprises an incineration oxidation furnace 6 and a high-temperature water pipe boiler 8 which is connected with the incineration oxidation furnace 6 and used for recovering high-level energy heat generated steam after oxidation; the separator 1 is connected with a circulating fan 2, the circulating fan 2 is connected with a low-temperature heat exchanger 3 and a catalytic reactor 5, the low-temperature heat exchanger 3 is respectively connected with an electric heater 4 and a water cooler 7, the electric heater 4 is connected with the catalytic reactor 5, and the catalytic reactor 5 is connected with an incineration oxidation furnace 6 and the low-temperature heat exchanger 3.
The invention discloses a final-stage integrated intelligent treatment new process for harmful waste gas, which comprises the following steps:
(1) firstly, the mist-shaped liquid drops in the harmful waste gas are efficiently separated by the separator 1 for recycling, then the circulating fan 2 sucks the separated harmful waste gas and enters the low-temperature heat exchanger 3, and the low-temperature heat exchanger 3 preliminarily heats the harmful waste gas; then the waste gas is heated by an electric heater 4 to the catalytic reaction temperature and enters a catalytic reactor 5, the harmful waste gas completes the catalytic oxidation reaction in the catalytic reactor 5 filled with the catalyst, the catalytic reactor 5 comprises two or more sections of catalysts with different performances, and the gas after the catalytic oxidation reaction is led out from the upper section or middle section outlet of the catalytic reactor 5 to reduce the space velocity of the rear end or tail section catalyst and improve the conversion rate; the low-temperature gas led out by the circulating fan 2 enters any two adjacent sections of catalysts to cool the temperature of the reacted gas so as to prevent the temperature rise of the catalytic bed from being too high, thereby protecting the activity of the catalysts. The service life of the catalyst is prolonged; catalytic oxidation to produce harmless CO2And H2And O, the gas reaching the national mandatory emission standard is cooled by the low-temperature heat exchanger 3 and then is discharged.
(2) When the activity of the catalyst in the catalytic reactor 5 begins to decline, harmful waste gas which does not reach the national standard after the catalytic oxidation reaction of the catalytic reactor 5 enters the circulating fan 2 for continuous recirculation after passing through the low-temperature heat exchanger 3 and the water cooler 7, continues catalytic oxidation through the catalytic reactor 5, then enters the incineration oxidation furnace 6, reaches the national standard after being completely incinerated and oxidized at high temperature through the incineration oxidation furnace 6, and is discharged after the heat is recovered through the high-temperature water pipe boiler 8.
The second embodiment is as follows:
example 1: a new final-stage integrated intelligent harmful waste gas treatment process comprises the following steps:
(1) firstly, the harmful waste gas is efficiently separated by the separator 1 to recycle the mist-like liquid drops in the waste gas,then 2 circulating fans 2 suck the separated harmful waste gas to enter a low-temperature heat exchanger 3, and the low-temperature heat exchanger 3 preliminarily heats the harmful waste gas; then heating the waste gas to 200-500 ℃ by two electric heaters 4, allowing the waste gas to enter a catalytic reactor 5, and finishing catalytic oxidation reaction of the harmful waste gas in the catalytic reactor 5 filled with catalyst, wherein the catalytic reactor 5 comprises three sections of catalysts with different performances, and the gas after catalytic oxidation reaction is led out from an upper section or a middle section outlet of the catalytic reactor 5 to reduce the space velocity of the rear end or the tail section catalyst and improve the conversion rate; the low-temperature gas led out by the circulating fan 2 enters the first section and the second section of the catalyst reactor 5, and the second section and the third section of the catalyst reactor cool and shock the reacted gas, so that the reaction temperature is reduced to prevent the temperature rise of a catalytic bed from being overhigh, the activity of the catalyst is protected, and the service life of the catalyst is prolonged; catalytic oxidation to produce harmless CO2And H2And O, the gas reaching the national mandatory emission standard is cooled by the low-temperature heat exchanger 3 and then is discharged.
(2) When the activity of the catalyst in the catalytic reactor 5 begins to decline, the waste gas which does not reach the national standard after the catalytic oxidation reaction of the catalytic reactor 5 enters the circulating fan 2 through the low-temperature heat exchanger 3 and the water cooler 7 to be continuously recycled, the recycled harmful waste gas enters the incineration oxidation furnace 6, is incinerated and oxidized at the high temperature of 600-900 ℃ by the incineration oxidation furnace 6, reaches the national standard, and is discharged after the heat is recovered by the high-temperature water tube boiler 8. The amount of the waste gas entering the incineration oxidation furnace 6 is the same as the amount of the harmful waste gas supplied to the separator 1.
The invention relates to a new final-stage integrated intelligent treatment process for harmful waste gas, which is a catalytic oxidation integrated design; the conversion efficiency of the treated waste gas is as high as 99 percent; the catalysis saves energy for burning, the burning provides heat and guarantee for the catalysis, and after the catalytic oxidation treatment, the tail gas reaching the national emission standard is discharged through the flue. The catalytic oxidation unit uses trace harmful waste gas recycling which does not reach the standard in the later period, reduces the supplement amount of air outside the device, fully utilizes the heat energy generated by catalytic oxidation, and prolongs the engineering service life of the device. The high-temperature incineration process can be stopped when the catalytic oxidation can be operated by self-heating and can meet the requirement of environmental protection and emission. The invention has the advantages of good intrinsic safety and reliability and stable continuous heat exchange operation; energy-saving and efficient, has compact structure, occupies less space, is simple and convenient to operate, and is convenient for realizing artificial intelligence and unmanned control.
The basic principle of the invention, first of all, is that industrially hazardous gases, in particular the volatile organic compounds VOCs, are generally composed of hydrocarbons. Most of the hydrocarbon is flameless combusted under the action of oxygen enrichment and a catalyst at the temperature of 200-500 ℃, and is oxidized and decomposed into nontoxic and harmless CO2And H2O, with a large amount of heat evolved. A small amount of substances with heavy carbon chains which are difficult to decompose can be incinerated, oxidized and decomposed into CO at 800-900 DEG C2And H2O。
The reaction equation is as follows:
the new integrated intelligent treatment process for the harmful waste gas at the last stage fills more than 2 sections of catalysts with different properties and higher affinity to harmful gases under different working conditions, the temperature is controlled to be 200-500 ℃, the catalyst is used as a preposed catalytic oxidation unit, in order to improve the conversion rate, effectively control the proper reaction temperature and prolong the service life of the catalyst, a preposed unit is provided with a circulating fan, and the catalyst is subjected to multiple circulating catalytic oxidation and is provided with a cold shock cooling means. And then a high-temperature oxidation incineration unit is arranged, and the temperature can reach 600-900 ℃. The pre-unit catalytic oxidation can not be completely oxidized or due to the engineering factors such as catalyst poisoning and inactivation and the like, harmful waste gas of which the exhaust gas can not reach the standard after the pre-unit catalytic oxidation is put into the high-temperature incineration oxidation unit, and the harmful waste gas is continuously incinerated and oxidized and then is discharged after reaching the standard.
The final-stage integrated intelligent treatment new process for harmful waste gas can have more than 2 combinations according to different working conditions. As shown in figure 2, the final-stage integrated intelligent treatment new process combination of harmful waste gas of the invention is that VOCs waste gas passes through a separator, a circulating fan, a low-temperature heat exchanger tube, a start-up electric heater, a catalytic reactor and a low-temperature heat exchanger tube in sequence and is discharged after reaching standards. As shown in fig. 3, the final-stage integrated intelligent treatment new process combination ii of harmful exhaust gas of the present invention is that the VOCs exhaust gas sequentially passes through a separator, a circulating fan, a low-temperature heat exchanger tube, a start-up electric heater, and a catalytic reactor; one path of the waste water passes through the low-temperature heat exchanger pipe, the water cooler and the circulating fan after passing through the catalytic reactor to continue circulating; the other path of the waste water is discharged after reaching standards through an incineration oxidation furnace and a high-temperature water pipe boiler.
The catalytic reactor adopts cooling circulating gas to reduce temperature and transfer heat. For some large industrial devices, the cooling of the circulating cold shock gas of the catalytic reactor can be changed into cooling water phase change cooling heat transfer.
The new final-stage integrated intelligent treatment process for harmful waste gas is continuously operated, is intrinsically safe compared with the existing similar heat accumulating type RTO device, and can be used for harmless final-stage treatment of most industrial devices with explosion-proof requirements or toxic waste gas emission and waste gas treatment of industrial chemical hazardous waste site storage rooms and the like. And the system is matched with artificial intelligence design, so that unmanned or remote control can be realized.
The invention relates to a harmful waste gas treatment station of an intelligent integrated micro-scale of a new final-stage integrated intelligent treatment process of harmful waste gas, which can be used in occasions of micro-negative pressure temporary storage rooms of medical waste, catering industries, high-rise oil smoke emission of residential quarters and the like.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A new process for final-stage integrated intelligent treatment of harmful waste gas is characterized by comprising a preposed catalytic oxidation unit and a high-temperature incineration oxidation unit which are connected; the method comprises the following steps:
(1) harmful waste gas is heated to reaction temperature by a heat exchanger in the preposed catalytic oxidation unit and enters a catalyst bed layer, and the harmful waste gas and oxygen in the air undergo oxidation reaction under the catalytic action of the catalyst to produce harmless CO2And H2O, reaches the national emission standardGas is discharged through the flue;
(2) when the activity of the catalyst bed begins to decline, harmful waste gas which does not reach the national standard after catalytic oxidation circulates in the preposed catalytic oxidation unit, then enters the high-temperature incineration oxidation unit for high-temperature incineration, reaches the national emission standard after incineration, and is discharged through a flue.
2. The harmful exhaust gas final-stage integrated intelligent treatment new process according to claim 1, characterized in that: the preposed catalytic oxidation unit comprises a separator (1), a circulating fan (2), a low-temperature heat exchanger (3), an electric heater (4), a catalytic reactor (5) and a water cooler (7); the high-temperature oxidation incineration unit comprises an incineration oxidation furnace (6); the method comprises the following steps:
(1) harmful waste gas firstly enters a separator (1), atomized liquid drops in the separated waste gas are recycled through the separator (1), the separated harmful waste gas is sucked by a circulating fan (2) and enters a low-temperature heat exchanger (3), and the harmful waste gas is primarily heated by the low-temperature heat exchanger (3); then the waste gas is heated to the catalytic reaction temperature by an electric heater (4) and enters a catalytic reactor (5), and the harmful waste gas completes the catalytic oxidation reaction in the catalytic reactor (5) filled with the catalyst; catalytic oxidation to produce harmless CO2And H2O, the gas reaching the national emission standard is discharged after being cooled by the low-temperature heat exchanger (3);
(2) when the activity of the catalyst in the catalytic reactor (5) begins to decline, the waste gas which does not reach the national standard after the catalytic oxidation reaction of the catalytic reactor (5) enters the circulating fan (2) through the low-temperature heat exchanger (3) and the water cooler (7) to continue to be recycled, the recycled harmful waste gas enters the incineration oxidation furnace (6), and the harmful waste gas reaches the national standard after the high-temperature incineration oxidation of the incineration oxidation furnace (6) and is discharged.
3. The harmful exhaust gas final-stage integrated intelligent treatment new process according to claim 2, characterized in that: the incineration oxidation furnace (6) is connected with a high-temperature water tube boiler (8) for recovering high-level energy heat generated steam after oxidation.
4. The harmful exhaust gas final-stage integrated intelligent treatment new process according to claim 2, characterized in that: the circulating fans (2) are a plurality of circulating fans which are arranged side by side so as to improve the power for sucking harmful waste gas; the electric heater (4) is a plurality of electric furnaces which are arranged side by side so as to rapidly heat harmful waste gas.
5. The harmful exhaust gas final-stage integrated intelligent treatment new process according to claim 2, characterized in that: the temperature of the catalytic oxidation reaction of harmful waste gas in the catalytic reactor (5) is 200-500 ℃.
6. The harmful exhaust gas final-stage integrated intelligent treatment new process according to claim 2, characterized in that: the incineration oxidation reaction temperature of harmful waste gas in the incineration oxidation furnace (6) is 600-900 ℃.
7. The harmful exhaust gas final-stage integrated intelligent treatment new process according to claim 2, characterized in that: the catalytic reactor (5) comprises two or more sections of catalysts with different performances, and low-temperature gas led out by the circulating fan enters between any two adjacent sections of catalysts to cool the temperature of the reacted gas so as to prevent the temperature rise of a catalytic bed layer from being too high, thereby protecting the activity of the catalysts.
8. The harmful exhaust gas final-stage integrated intelligent treatment new process according to claim 7, characterized in that: the gas after catalytic oxidation reaction in the catalytic reactor (5) is led out from the outlet of the upper section or the middle section of the catalytic reactor (5) to reduce the space velocity of the rear end or the tail section catalyst so as to improve the conversion rate.
9. The harmful exhaust gas final-stage integrated intelligent treatment new process according to claim 2, characterized in that: the amount of the waste gas entering the incineration oxidation furnace (6) is the same as the amount of harmful waste gas supplied to the separator (1).
10. The harmful exhaust gas final-stage integrated intelligent treatment new process according to claim 2, characterized in that: and intelligent electronic elements are arranged on the components of the preposed catalytic oxidation unit and the high-temperature oxidation incineration unit to realize intelligent automatic operation.
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