CN112303652A - Gravure workshop waste gas air reduction treatment system and treatment method - Google Patents

Gravure workshop waste gas air reduction treatment system and treatment method Download PDF

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Publication number
CN112303652A
CN112303652A CN202010594764.3A CN202010594764A CN112303652A CN 112303652 A CN112303652 A CN 112303652A CN 202010594764 A CN202010594764 A CN 202010594764A CN 112303652 A CN112303652 A CN 112303652A
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chamber
valve
reversing valve
air
gravure
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CN202010594764.3A
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CN112303652B (en
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李朝刚
刘小文
武继勇
余铭信
雷明荣
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Dongguan Kwg Color Printing Co ltd
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Dongguan Kwg Color Printing Co ltd
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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
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
    • F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
    • F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means
    • 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
    • B01D53/02—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 adsorption, e.g. preparative gas chromatography
    • B01D53/04—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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
  • Incineration Of Waste (AREA)

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a gravure workshop waste gas air reduction treatment system and a treatment method, wherein the gravure workshop waste gas air reduction treatment system comprises a gas collection fan, a gas transmission pipeline, a main fan, an RTO incinerator, an exhauster, a first reversing valve, a second reversing valve, a third reversing valve, an air reduction device and an LEL detector; the RTO incinerator is provided with a regenerative chamber, a furnace body and an alternate combustion adsorption device; a left chamber, a combustion chamber and a right chamber are sequentially arranged in the furnace body in parallel, a main fan is connected with one end of a first reversing valve, the other end of the first reversing valve is connected with the left chamber or the right chamber, one end of a second reversing valve is connected with the left chamber or the right chamber, the other end of the second reversing valve is connected with one end of a third reversing valve, and the other end of the third reversing valve is connected with the combustion chamber or an air reducing device. The gravure workshop waste gas air reduction treatment system and the treatment method can reduce the content of organic gas, and can further reduce the air delivery volume and reduce the waste gas treatment cost when the concentration of the organic gas in the waste gas does not reach LEL.

Description

Gravure workshop waste gas air reduction treatment system and treatment method
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a gravure workshop waste gas air reduction treatment system and a treatment method.
Background
In the packaging and printing industry, in order to ensure the drying quality and production safety of products in a long period of time, the air exhaust volume of an oven is very large in the drying process, and in order to ensure that the smell of a workshop is small and reduce the discomfort of workers, part of printing workshops can exhaust air increasingly, and organic solvents which are diffused in the workshops are further collected through pipelines and then discharged. Generally, when a 10-color gravure press is used for producing conventional products, the exhaust volume of oven waste gas is approximately 20000-50000 m under different printing speeds3Perh, the printing enterprise exhausting air partially and additionally can increase 10000-20000 m on the basis of the original exhaust air quantity3The ground of/h exhausts.
The waste gas discharged from the gravure workshop is sent to an RTO device for oxidation reaction. According to the operating principle of RTO, the organic waste gas can be removed only when the temperature in the furnace is over 760 ℃. Generally, if the VOCs in the exhaust gas is higher than 700ppm, the heat generated by the oxidation reaction of the organic matter is enough to heat the exhaust gas to 760 ℃, and the RTO can be self-maintained without consuming natural gas. However, the concentration of the waste gas of the current gravure workshop is low, which is not enough to enable the RTO to realize self-maintenance, so that a large amount of natural gas is consumed in the waste gas treatment process, and the cost is high. The heat taken away by the traditional printer by the externally exhausted air is about 80% of the heating energy consumption, the air exhaust amount is reduced by half, the heating energy consumption can be reduced by 40%, meanwhile, the air exhaust amount is reduced by half, under the condition that an air path pipe network system is not changed, the power of a selected main fan is greatly reduced, the electric energy consumed by the fan is reduced, the increase of the concentration of VOCs in the waste gas is an important method for reducing the waste gas treatment cost, and therefore 'air reduction and concentration increase' is an actively pursued target in the industry. However, the concentration of the organic waste gas is strictly controlled below the LEL, otherwise a safety accident may occur. How to reduce the air quantity as much as possible and make the concentration of the total organic gas in the waste gas lower than LEL becomes an industrial problem.
Disclosure of Invention
The invention aims to provide a gravure workshop waste gas air reduction treatment system and a treatment method aiming at the defects of the prior art, and the gravure workshop waste gas air reduction treatment system and the treatment method can solve the problems.
In order to achieve the purpose, the gravure workshop waste gas air reduction treatment system comprises a gas collection fan, a gas transmission pipeline, a main fan, an RTO incinerator and an exhauster, wherein two ends of the main fan are respectively communicated and connected with the gas collection fan and the RTO incinerator through the gas transmission pipeline;
the RTO incinerator is provided with a regenerative chamber, a furnace body and an alternate combustion adsorption device; the furnace body is internally provided with a left chamber, a combustion chamber and a right chamber in sequence in parallel, the alternate combustion adsorption device comprises a first containing chamber and a second containing chamber which are arranged in parallel, and combustible adsorption bricks are arranged in the first containing chamber and the second containing chamber; the alternative combustion adsorption device can move among the left chamber, the combustion chamber and the right chamber, and when the first accommodating chamber is positioned in the left chamber, the second accommodating chamber is positioned in the combustion chamber; when the first accommodating chamber is positioned in the combustion chamber, the second accommodating chamber is positioned in the right chamber;
the main fan is connected with one end of a first reversing valve, the other end of the first reversing valve is connected with the left chamber or the right chamber, one end of a second reversing valve is connected with the left chamber or the right chamber, the other end of the second reversing valve is connected with one end of a third reversing valve, and the other end of the third reversing valve is connected with the combustion chamber or the air reducing device;
the combustion chamber is communicated with the exhaust device; the LEL detector is connected in series between the air reduction device and the combustion chamber.
Furthermore, the RTO incinerator also comprises a first poppet valve and a second poppet valve, the regenerator comprises a first regenerator and a second regenerator, the first regenerator and the second regenerator are respectively communicated with two ends of the combustion chamber, the first regenerator is communicated with the first poppet valve, and the second regenerator is communicated with the second poppet valve; the other end of the third reversing valve is communicated with the air inlet chambers of the first poppet valve and the second poppet valve, and the exhaust chambers of the first poppet valve and the second poppet valve are communicated with the exhaust device.
Further, according to the gravure workshop waste gas air reduction treatment system, the first heat storage chamber and the second heat storage chamber are internally provided with the plurality of layers of honeycomb heat storage bricks.
Furthermore, the gravure workshop waste gas air reduction treatment system is characterized in that the first poppet valve/the second poppet valve is provided with a valve body, a valve core and a driving cylinder for adjusting the position of the valve core, an air inlet chamber and an air outlet chamber are arranged inside the valve body and are formed by the valve core at intervals, and a piston rod of the driving cylinder is connected with the valve core.
Further, according to the gravure workshop waste gas air reduction treatment system, the combustible adsorption bricks are activated carbon bricks.
Further, according to the gravure workshop waste gas air-reducing treatment system, the activated carbon brick is internally provided with the adsorption vent hole which is divided into the air inlet end and the air outlet end, and the caliber of the air inlet end is 3-10 times that of the air outlet end.
Furthermore, the relationship between the caliber a cm of the air inlet end, the caliber b cm of the air outlet end, the length c cm of the adsorption vent hole and the blast speed d m/s of the blast of the main fan is a-b-d/(x c), wherein x is 10-50.
Furthermore, according to the gravure workshop exhaust gas air reduction treatment system, heat insulation cotton is arranged between the first accommodating chamber and the second accommodating chamber and can generate heat transfer.
Furthermore, the gravure workshop waste gas air reduction treatment system also comprises a driving cylinder for driving the alternative combustion adsorption device to move among the left chamber, the combustion chamber and the right chamber.
Furthermore, according to the gravure workshop waste gas wind reduction treatment system, the left chamber and the right chamber are respectively provided with a heat insulation sealing door, the inner wall of each heat insulation sealing door is provided with a heat insulation ceramic tile, and the end parts of the first accommodating chamber and the second accommodating chamber are respectively provided with an opening and closing door.
Further, according to the gravure workshop waste gas air reduction treatment system, the combustible adsorption bricks are stacked in the first containing chamber/the second containing chamber to form adsorption walls which are arranged in a multi-row interval mode, each adsorption wall comprises a left side wall and a right side wall, the left end portion of the left side wall is in contact with the inner wall of the first containing chamber/the second containing chamber, the right end portion of the right side wall is in contact with the inner wall of the first containing chamber/the second containing chamber, and the left side wall and the right side wall are arranged in a staggered mode.
Furthermore, the gravure workshop waste gas air reduction treatment system further comprises a fresh air valve, one end of the fresh air valve is arranged in parallel with the gas collection fan and is communicated with the main fan, and the other end of the fresh air valve is communicated with the outside.
In order to achieve the above object, the method for reducing the amount of exhaust gas from the gravure printing workshop according to the present invention comprises the steps of using the system for reducing the amount of exhaust gas from the gravure printing workshop according to any one of claims 1 to 9, in a first stage, positioning a first accommodating chamber in a left chamber, positioning a second accommodating chamber in a combustion chamber, controlling a first reversing valve to conduct a main blower with the left chamber, controlling a second reversing valve to conduct the left chamber with a third reversing valve, controlling the third reversing valve to conduct the second reversing valve with an air reducing device, so that the exhaust gas enters the first accommodating chamber in the left chamber through a gas collecting blower, and combustible adsorption bricks in the first accommodating chamber adsorb organic matters in the exhaust gas; controlling the first poppet valve and the second poppet valve to enable the adsorbed waste gas to enter a first heat storage chamber after being subjected to wind reduction and thickening through a wind reduction device, then enter a combustion chamber for combustion, enter a second heat storage chamber after coming out of the combustion chamber, and enter an exhaust chimney after coming out of the second heat storage chamber; when the value of the LEL detector exceeds a preset value, controlling a third reversing valve to conduct the second reversing valve with the first heat storage chamber, and reducing the concentration of the waste gas entering the first heat storage chamber; when the numerical value of the LEL detector exceeds the alarm, opening a fresh air valve to introduce fresh air into the gas transmission pipeline; after working for a certain time, controlling the first poppet valve and the second poppet valve to change the direction of the waste gas in the first regenerative chamber, the second regenerative chamber and the combustion chamber; after working for a certain time, controlling the first reversing valve to conduct the main fan with the right chamber, and controlling the second reversing valve to conduct the right chamber with the third reversing valve; the first accommodating chamber is controlled to be located in the combustion chamber, so that the combustible adsorption bricks adsorbing organic matters in the first accommodating chamber are combusted in the combustion chamber, and the second accommodating chamber is located in the right chamber to adsorb the organic matters in the waste gas after the combustible adsorption bricks are replaced.
The invention has the beneficial effects that: according to the gravure workshop waste gas air reduction treatment system, the combustible adsorption bricks can adsorb organic gas in waste gas, the content of the organic gas in the waste gas is reduced, the concentration of the organic waste gas in the waste gas can not reach LEL, the air delivery quantity can be further reduced, and the system cost is reduced.
Drawings
Fig. 1 is a schematic view of the connection structure of the present invention.
FIG. 2 is a schematic cross-sectional view of an alternative combustion adsorption apparatus and furnace body according to the present invention.
FIG. 3 is a schematic top view of the adsorption wall of the present invention with multiple rows of adsorption walls arranged at intervals.
The reference numerals include:
1-gas collection fan 2-main fan 3-RTO incinerator
31-furnace body 32-left chamber 33-combustion chamber 34-right chamber
35-first regenerator 36-second regenerator
4-alternative combustion adsorption device
41-first containing chamber 42-second containing chamber 43-combustible adsorption brick 44-adsorption wall
5-LEL detector
61-first direction changing valve 62-second direction changing valve 63-third direction changing valve 64-fresh air valve
7-wind reducing device 8-exhauster
91-first poppet valve 92-second poppet valve.
Detailed Description
The present invention is described in detail below with reference to the attached drawings.
As shown in fig. 1 and 2, the gravure workshop exhaust gas air reduction treatment system of the present invention includes a gas collection fan 1, a gas transmission pipeline, a main fan 2, an RTO incinerator 3 and an exhaust fan 8, wherein two ends of the main fan 2 are respectively connected with the gas collection fan 1 and the RTO incinerator 3 through the gas transmission pipeline, the RTO incinerator 3 is connected with the exhaust fan 8, and the system further includes a first reversing valve 61, a second reversing valve 62, a third reversing valve 63, an air reduction device 7 and an LEL detector;
the RTO incinerator 3 is provided with a regenerator, a furnace body 31 and an alternate combustion adsorption device 4; the furnace body 31 is internally provided with a left chamber 32, a combustion chamber 33 and a right chamber 34 in parallel in sequence, the alternative combustion adsorption device 4 comprises a first containing chamber 41 and a second containing chamber 42 which are arranged in parallel, and combustible adsorption bricks 43 are arranged in the first containing chamber 41 and the second containing chamber 42; the alternate combustion adsorption device 4 can move among the left chamber 32, the combustion chamber 33 and the right chamber 34, and when the first accommodating chamber 41 is positioned in the left chamber 32, the second accommodating chamber 42 is positioned in the combustion chamber 33; when the first housing chamber 41 is located in the combustion chamber 33, the second housing chamber 42 is located in the right chamber 34;
the main fan 2 is connected with one end of a first reversing valve 61, the other end of the first reversing valve 61 is connected with the left chamber 32 or the right chamber 34, one end of a second reversing valve 62 is connected with the left chamber 32 or the right chamber 34, the other end of the second reversing valve 62 is connected with one end of a third reversing valve 63, and the other end of the third reversing valve 63 is connected with the combustion chamber 33 or the air reducing device 7; the combustion chamber 33 is connected with the exhaust device 8 in a conduction way; the LEL detector is connected in series between the air reduction device 7 and the combustion chamber 33. According to the gravure workshop waste gas air reduction treatment system, the combustible adsorption bricks 43 can adsorb organic gas in waste gas, reduce the content of the organic gas in the waste gas, further reduce the air delivery rate, reduce the electric energy consumption cost of the system and improve the safety performance of the system while the concentration of the organic waste gas in the waste gas does not reach LEL. The LEL of the present invention to the lower explosive limit of the exhaust gas.
Further, in the gravure printing shop exhaust gas wind reduction treatment system of the present invention, the RTO incinerator 3 further includes a first poppet valve 91 and a second poppet valve 92, the regenerators include a first regenerator 35 and a second regenerator 36, the first regenerator 35 and the second regenerator 36 are respectively communicated with two ends of the combustion chamber 33, the first regenerator 35 is communicated with the first poppet valve 91, and the second regenerator 36 is communicated with the second poppet valve 92; the other end of the third switching valve 63 is in communication with the intake chambers of the first poppet valve 91 and the second poppet valve 92, and the exhaust chambers of the first poppet valve 91 and the second poppet valve 92 are in communication with the exhaust stack 8.
In the gravure workshop exhaust gas air reduction treatment system, a plurality of layers of honeycomb heat storage bricks are arranged in the first heat storage chamber 35 and the second heat storage chamber 36. According to the gravure workshop waste gas air-reducing treatment system, after the gravure workshop waste gas air-reducing treatment system is used for a certain time, the flow directions of gas in the first heat storage chamber 35 and the second heat storage chamber 36 can be adjusted through the first lifting valve 91 and the second lifting valve 92, and the phenomenon that floccules in VOCs waste gas are accumulated on the windward side of honeycomb heat storage bricks is avoided or reduced, so that the honeycomb heat storage bricks are prevented or reduced from being blocked, the service life of the RTO incinerator 3 is prolonged, the times of shutdown maintenance are reduced, the use cost of waste gas treatment equipment is reduced, and the production efficiency is improved.
Specifically, the gravure printing workshop exhaust gas air reduction treatment system comprises a first poppet valve 91/a second poppet valve 92 and an air inlet chamber and an air outlet chamber, wherein the first poppet valve and the second poppet valve are provided with a valve body, a valve core and a driving cylinder for adjusting the position of the valve core, the air inlet chamber and the air outlet chamber are arranged in the valve body and are formed by the valve core at intervals, and a piston rod of the driving cylinder is connected with the valve core. According to the gravure workshop waste gas air reduction treatment system, the first poppet valve 91/the second poppet valve 92 are sensitive in reaction, and automatic control is convenient to realize.
Further, in the gravure workshop exhaust gas air reduction treatment system, the combustible adsorption brick 43 is an activated carbon brick. The activated carbon brick can adsorb organic gas in waste gas and can be combusted, and the activated carbon brick can be pushed into the combustion chamber 33 to be combusted after adsorbing enough organic gas and can be used as fuel to be combusted, so that the consumption of natural gas is further reduced, and the use cost of a system is reduced.
Further, according to the gravure workshop waste gas air-reducing treatment system, the activated carbon brick is internally provided with the adsorption vent hole which is divided into the air inlet end and the air outlet end, and the caliber of the air inlet end is 3-10 times that of the air outlet end. The activated carbon brick has high adsorption rate to organic gas.
The system for treating the exhaust gas of the gravure workshop by reducing the wind has the relationship that the aperture of the air inlet end is a centimeter, the aperture of the air outlet end is b centimeter, the length of the adsorption vent hole is c centimeter, and the wind speed of blast of the main fan 2 is d meter per second, wherein x is 10-50. The activated carbon brick of the present invention further improves the adsorption rate of organic gases in the exhaust gas, and allows the wind attenuation rate to be within a proper range when the exhaust gas passes through the first and second storage chambers 41 and 42.
Furthermore, in the gravure printing workshop exhaust gas wind reduction treatment system, the heat insulation cotton is arranged between the first accommodating chamber 41 and the second accommodating chamber 42 and can generate heat transfer, so that the heat loss of the first accommodating chamber 41 and the second accommodating chamber 42 during combustion in the combustion chamber 33 can be reduced, and meanwhile, the heat lost from the combustion chamber 33 can preheat the exhaust gas in the first accommodating chamber 41 or the second accommodating chamber 42 outside the combustion chamber 33, so that the use cost of the system is further reduced.
Further, the gravure workshop waste gas air reduction treatment system further comprises a driving cylinder for driving the alternative combustion adsorption device 4 to move among the left chamber 32, the combustion chamber 33 and the right chamber 34, and automatic electrical control can be realized.
Further, in the gravure workshop exhaust gas wind reduction treatment system of the present invention, the left chamber 32 and the right chamber 34 are respectively provided with a heat insulation sealing door, the inner wall of the heat insulation sealing door is provided with heat insulation ceramic bricks, and the end portions of the first accommodating chamber 41 and the second accommodating chamber 42 are respectively provided with an opening and closing door. The gravure workshop waste gas air reduction treatment system is convenient for replacing the combustible adsorption bricks 43.
Further, as shown in fig. 3, in the gravure workshop exhaust gas wind reduction processing system of the present invention, the combustible adsorbent bricks 43 are stacked in the first accommodating chamber 41/the second accommodating chamber 42 to form a plurality of rows of adsorbent walls 44 arranged at intervals, each adsorbent wall 44 includes a left side wall and a right side wall, a left end portion of the left side wall is in contact with an inner wall of the first accommodating chamber 41/the second accommodating chamber 42, a right end portion of the right side wall is in contact with an inner wall of the first accommodating chamber 41/the second accommodating chamber 42, and the left side wall and the right side wall are arranged in an intersecting manner. The distance between two adjacent rows of the adsorption walls 44 is 0.3-0.7 times of the thickness of the adsorption wall 44. The gravure workshop exhaust gas air reduction treatment system further improves the adsorption rate of organic gas in the exhaust gas, and can ensure that the wind force attenuation rate is in a proper range when the exhaust gas passes through the first accommodating chamber 41 and the second accommodating chamber 42.
According to the activated carbon brick, the relation between the caliber a cm of the air inlet end, the caliber b cm of the air outlet end, the length c cm of the adsorption vent hole and the blast speed d m/s of the blast of the main fan 2 is a-b-d/(x c), wherein x is 10-50, when x is 20, the wind attenuation rate of waste gas passing through the first accommodating chamber 41 and the second accommodating chamber 42 is 40-50%, and the concentration ratio of organic waste gas in the waste gas is lower than LEL.
Further, the gravure workshop waste gas air reduction treatment system further comprises a fresh air valve 64, one end of the fresh air valve 64 is arranged in parallel with the air collection fan 1 and is communicated with the main fan 2, and the other end of the fresh air valve 64 is communicated with the outside. According to the gravure workshop waste gas air-reducing treatment system, when the concentration proportion of organic waste gas in the waste gas is close to LEL, fresh air can be rapidly introduced through the fresh air valve 64 to reduce the concentration of the organic gas.
In order to achieve the above object, in the method for reducing the amount of exhaust gas in the gravure workshop according to the present invention, using the system for reducing the amount of exhaust gas in the gravure workshop according to any one of the above aspects of the present invention, in the first stage, the first accommodating chamber 41 is located in the left chamber 32, the second accommodating chamber 42 is located in the combustion chamber 33, the first reversing valve 61 is controlled to conduct the main blower 2 with the left chamber 32, the second reversing valve 62 is controlled to conduct the left chamber 32 with the third reversing valve 63, and the third reversing valve 63 is controlled to conduct the second reversing valve 62 with the air reducing device 7, so that the exhaust gas enters the first accommodating chamber 41 in the left chamber 32 through the gas collecting blower 1, and the combustible adsorption bricks 43 in the first accommodating chamber 41 adsorb organic matters in the exhaust gas; controlling the first poppet valve 91 and the second poppet valve 92 to make the adsorbed exhaust gas enter the first regenerative chamber 35 after being subjected to wind reduction and concentration by the wind reduction device 7, then enter the combustion chamber 33 for combustion, enter the second regenerative chamber 36 after coming out of the combustion chamber 33, and enter the exhaust chimney after coming out of the second regenerative chamber 36; when the value of the LEL detector exceeds a preset value, controlling a third reversing valve 63 to conduct a second reversing valve 62 with the first heat storage chamber 35, and reducing the concentration of the exhaust gas entering the first heat storage chamber 35; when the numerical value of the LEL detector exceeds the alarm, opening a fresh air valve 64 to introduce fresh air into the gas transmission pipeline; after a certain time of operation, the first poppet valve 91 and the second poppet valve 92 are controlled to change the direction of the exhaust gas in the first regenerator 35, the second regenerator 36, and the combustion chamber 33; after working for a certain time, controlling the first reversing valve 61 to conduct the main fan 2 with the right chamber 34, and controlling the second reversing valve 62 to conduct the right chamber 34 with the third reversing valve 63; the first containing chamber 41 is controlled to be positioned in the combustion chamber 33, so that the combustible adsorption bricks 43 adsorbing organic matters in the first containing chamber 41 are combusted in the combustion chamber 33, and the second containing chamber 42 is positioned in the right chamber 34 to adsorb the organic matters in the exhaust gas after the combustible adsorption bricks 43 are replaced. The method for treating the gravure workshop waste gas by reducing the air reduces the content of organic gas in the waste gas, can further reduce the air delivery volume and the system cost while not causing the concentration of the organic waste gas in the waste gas to reach LEL, and can also reduce the usage amount of natural gas and further reduce the use cost.
In conclusion, the present invention has the above-mentioned excellent characteristics, so that it can be used to enhance the performance of the prior art and has practicability, and becomes a product with practical value.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. Gravure workshop waste gas subtracts wind processing system, burn burning furnace and air exhauster including gas collection fan, gas transmission pipeline, main blower, RTO, the both ends of main blower burn burning furnace turn-on connection through gas transmission pipeline and gas collection fan, RTO respectively, and RTO burns burning furnace and air exhauster turn-on connection, its characterized in that: the wind-reducing device also comprises a first reversing valve, a second reversing valve, a third reversing valve, a wind-reducing device and an LEL detector;
the RTO incinerator is provided with a regenerative chamber, a furnace body and an alternate combustion adsorption device; the furnace body is internally provided with a left chamber, a combustion chamber and a right chamber in sequence in parallel, the alternate combustion adsorption device comprises a first containing chamber and a second containing chamber which are arranged in parallel, and combustible adsorption bricks are arranged in the first containing chamber and the second containing chamber; the alternative combustion adsorption device can move among the left chamber, the combustion chamber and the right chamber, and when the first accommodating chamber is positioned in the left chamber, the second accommodating chamber is positioned in the combustion chamber; when the first accommodating chamber is positioned in the combustion chamber, the second accommodating chamber is positioned in the right chamber;
the main fan is connected with one end of a first reversing valve, the other end of the first reversing valve is connected with the left chamber or the right chamber, one end of a second reversing valve is connected with the left chamber or the right chamber, the other end of the second reversing valve is connected with one end of a third reversing valve, and the other end of the third reversing valve is connected with the combustion chamber or the air reducing device;
the combustion chamber is communicated with the exhaust device; the LEL detector is connected in series between the air reduction device and the combustion chamber.
2. The gravure shop exhaust air reduction processing system according to claim 1, wherein: the RTO incinerator also comprises a first poppet valve and a second poppet valve, the heat storage chamber comprises a first heat storage chamber and a second heat storage chamber, the first heat storage chamber and the second heat storage chamber are respectively communicated with two ends of the combustion chamber, the first heat storage chamber is communicated with the first poppet valve, and the second heat storage chamber is communicated with the second poppet valve; the other end of the third reversing valve is communicated with the air inlet chambers of the first poppet valve and the second poppet valve, and the exhaust chambers of the first poppet valve and the second poppet valve are communicated with the exhaust device.
3. The gravure workshop exhaust air reduction processing system according to claim 2, wherein: and a plurality of layers of honeycomb heat storage bricks are arranged in the first heat storage chamber and the second heat storage chamber.
4. The gravure workshop exhaust air reduction processing system according to claim 2, wherein: the first poppet valve/the second poppet valve is provided with a valve body, a valve core and a driving cylinder for adjusting the position of the valve core, an air inlet chamber and an air outlet chamber are arranged inside the valve body, the air inlet chamber and the air outlet chamber are formed by the valve core at intervals, and a piston rod of the driving cylinder is connected with the valve core.
5. The gravure shop exhaust air reduction processing system according to claim 1, wherein: the combustible adsorption brick is an activated carbon brick.
6. The gravure shop exhaust air reduction processing system according to claim 5, wherein: the activated carbon brick is internally provided with an adsorption vent hole which is divided into an air inlet end and an air outlet end, and the caliber of the air inlet end is 3-10 times that of the air outlet end.
7. The gravure shop exhaust air reduction processing system according to claim 1, wherein: the left chamber and the right chamber are respectively provided with a heat insulation sealing door, the inner wall of each heat insulation sealing door is provided with a heat insulation ceramic tile, and the end parts of the first accommodating chamber and the second accommodating chamber are respectively provided with an opening and closing door.
8. The gravure shop exhaust air reduction processing system according to claim 1, wherein: the combustible adsorption bricks are stacked in the first accommodating chamber/the second accommodating chamber to form adsorption walls arranged at intervals in multiple rows, each adsorption wall comprises a left side wall and a right side wall, the left end portion of each left side wall is in contact with the inner wall of the corresponding first accommodating chamber/the corresponding second accommodating chamber, the right end portion of each right side wall is in contact with the inner wall of the corresponding first accommodating chamber/the corresponding second accommodating chamber, and the left side wall and the right side wall are arranged in a staggered mode.
9. The gravure shop exhaust air reduction processing system according to claim 1, wherein: the air collecting fan is characterized by further comprising a fresh air valve, one end of the fresh air valve is arranged in parallel with the air collecting fan and is in conduction connection with the main fan, and the other end of the fresh air valve is in conduction with the outside.
10. The method for reducing the air in the waste gas of the gravure workshop is characterized by comprising the following steps: the gravure workshop waste gas air reduction treatment system is used, in the first stage, the first containing chamber is located in the left chamber, the second containing chamber is located in the combustion chamber, the first reversing valve is controlled to conduct the main fan with the left chamber, the second reversing valve is controlled to conduct the left chamber with the third reversing valve, the third reversing valve is controlled to conduct the second reversing valve with the air reduction device, waste gas enters the first containing chamber in the left chamber through the gas collection fan, and combustible adsorption bricks in the first containing chamber adsorb organic matters in the waste gas; controlling the first poppet valve and the second poppet valve to enable the adsorbed waste gas to enter a first heat storage chamber after being subjected to wind reduction and thickening through a wind reduction device, then enter a combustion chamber for combustion, enter a second heat storage chamber after coming out of the combustion chamber, and enter an exhaust chimney after coming out of the second heat storage chamber; when the value of the LEL detector exceeds a preset value, controlling a third reversing valve to conduct the second reversing valve with the first heat storage chamber, and reducing the concentration of the waste gas entering the first heat storage chamber; when the numerical value of the LEL detector exceeds the alarm, opening a fresh air valve to introduce fresh air into the gas transmission pipeline; after working for a certain time, controlling the first poppet valve and the second poppet valve to change the direction of the waste gas in the first regenerative chamber, the second regenerative chamber and the combustion chamber; after working for a certain time, controlling the first reversing valve to conduct the main fan with the right chamber, and controlling the second reversing valve to conduct the right chamber with the third reversing valve; the first accommodating chamber is controlled to be located in the combustion chamber, so that the combustible adsorption bricks adsorbing organic matters in the first accommodating chamber are combusted in the combustion chamber, and the second accommodating chamber is located in the right chamber to adsorb the organic matters in the waste gas after the combustible adsorption bricks are replaced.
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