CN214468683U - Circulation of administering printing waste gas is from concentrated system - Google Patents
Circulation of administering printing waste gas is from concentrated system Download PDFInfo
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- CN214468683U CN214468683U CN202023170629.0U CN202023170629U CN214468683U CN 214468683 U CN214468683 U CN 214468683U CN 202023170629 U CN202023170629 U CN 202023170629U CN 214468683 U CN214468683 U CN 214468683U
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Abstract
The utility model provides a administer circulation of printing waste gas from concentrated system, including the second grade circulation circuit, including first fan and a plurality of first grade circulation circuit, first grade circulation circuit includes the printing machine, second fan and third fan, the gas outlet of the oven of printing machine communicates with the air intake of second fan, the air outlet of second fan communicates with the air intake of third fan, and the intercommunication is provided with first control valve between second fan and the third fan, the air outlet of third fan communicates with the air inlet of oven, the air intake of first fan communicates with the air outlet of second fan, and the intercommunication is provided with the second control valve between first fan and the second fan, the air outlet of first fan communicates with the air intake of third fan, and the intercommunication is provided with the third control valve between first fan and the third fan; the second air inlet of the low-temperature catalytic furnace is communicated with the air outlet of the first fan; the system can treat waste gas with medium and high temperature and medium and high concentration, and has the advantages of large treatment capacity, energy conservation and good treatment effect.
Description
Technical Field
The utility model belongs to the technical field of the printing exhaust-gas treatment technique and specifically relates to an administer circulation of printing waste gas from concentrated system.
Background
The printing process is subjected to processes of ink mixing, printing, drying and the like, Volatile Organic Compounds (VOCs) are generated and discharged in the processes, and the concentration of the discharged volatile organic compounds is usually 500mg/m3To 3000mg/m3. In addition, in the printing process, a plurality of printing machines are generally operated independently or jointly, so that a large amount of waste gas is generated in the process (for example, thirty-thousand to forty-thousand air volumes are required when one ten-color printing machine works), the concentration of volatile organic compounds is high, the temperature of the discharged waste gas (the volatile organic compounds are mixed in the waste gas) is high, and this results in that a large amount of natural gas is consumed when the discharged waste gas is treated in a direct combustion manner, so that the operation cost is very high, and the treated waste gas cannot easily reach the emission standard. Moreover, because the exhaust gas temperature is high, the conventional concentration methods such as activated carbon and molecular sieve cannot be adopted, so that the operation cost cannot be reduced.
Disclosure of Invention
In order to solve the above problems, the main object of the present invention is to provide a self-concentration system for treating waste gas with high temperature and medium-high concentration, and treating waste gas with high treatment capacity, energy saving and good treatment effect.
In order to realize the main purpose of the utility model, the utility model provides a circulating self-concentration system for treating printing waste gas, which comprises a secondary circulating loop and a low-temperature catalytic furnace, wherein the secondary circulating loop comprises a first fan and more than two primary circulating loops, each primary circulating loop comprises a printing machine, a second fan and a third fan, a first pipeline is connected between a first air outlet of an oven of the printing machine and a second air inlet of the second fan, a second pipeline is connected between a second air outlet of the second fan and a third air inlet of the third fan, a first control valve is arranged on the second pipeline, a third pipeline is connected between a third air outlet of the third fan and a first air inlet of the oven, a fourth pipeline is connected between a first air inlet and a second air outlet of the first fan, a second control valve is arranged on the fourth pipeline, a fifth pipeline is connected between the first air outlet and the third air inlet of the first fan, and a third control valve is arranged on the fifth pipeline, and a sixth pipeline is connected between the second air inlet and the first air outlet of the low-temperature catalytic furnace.
From the above, a part of volatile organic compounds generated in the printing process of the printing machine realize internal circulation in the primary circulation loop through the second fan, the third fan, the first pipeline, the second pipeline and the third pipeline of the primary circulation loop, so that the part of volatile organic compounds continuously enter the gas of the primary circulation loop to perform primary concentration treatment; and the other part of the volatile organic compounds are continuously mixed with the volatile organic compounds in the gas discharged by other primary circulation loops to carry out secondary concentration treatment. In addition, a part of volatile organic compounds in the external circulation loop enter the low-temperature catalytic furnace through a sixth pipeline for low-temperature catalytic combustion treatment and then are discharged; the rest part of the volatile organic compounds reenter each primary circulation loop through a fifth pipeline to participate in the internal circulation concentration treatment of the entered primary circulation loop again, and the volatile organic compounds generated in the printing process of the printing machine are subjected to concentration treatment in a reciprocating way. The utility model discloses a structural design from concentrated system to the circulation, make the volatile organic compounds that produces in the printing machine printing process constantly concentrated by the one-level circulation circuit of second grade circulation circuit and second grade circulation circuit, make the concentration multiplying power of volatile organic compounds can reach 3 times to 20 times, and low temperature catalytic furnace then carries out low temperature catalytic combustion to the volatile organic compounds after being concentrated and handles, discharge after being carbon dioxide and water with the volatile organic compounds catalytic cracking in the gas again, the problem that needs to consume a large amount of natural gas when having solved the mode of current adoption direct combustion and handling volatile organic compounds, still solved simultaneously because the gas temperature who discharges is higher and can't carry out concentrated problem to the volatile organic compounds in the gas, thereby by a wide margin reduction production running cost.
The circulating self-concentration system further comprises a heat exchange device, and a seventh pipeline is connected between a second air outlet of the low-temperature catalytic furnace and a hot air inlet of the heat exchange device; the fifth pipeline is also provided with a fourth control valve, an eighth pipeline is connected between a cold air inlet of the heat exchange device and an inlet end of the fourth control valve, the eighth pipeline is provided with a fifth control valve, and a ninth pipeline is connected between a cold air outlet of the heat exchange device and an outlet end of the fourth control valve.
It can be seen from the above that, because the volatile organic compounds after the low temperature catalytic combustion processing can give off a large amount of heat and mix in the gas of emission, consequently, through setting up heat transfer device, make the gas of emission after the low temperature catalytic combustion processing contain the gas of volatile organic compounds in heat transfer device and outer circulation return circuit and carry out the heat exchange, so that the temperature of the gas in the outer circulation return circuit keeps in a suitable state, and then make the gas in the outer circulation return circuit after the oven that gets into the printing machine of one-level circulation return circuit, need not the oven and heat or reduce the time that the oven heated this part of gas to this part of gas, and then play the effect of practicing thrift the energy consumption, in order further to reduce production running cost.
A tenth pipeline is connected between a fourth air outlet of the air supplementing fan and the fifth pipeline; and the communication part of the tenth pipeline and the fifth pipeline is positioned between the first air outlet and the inlet end of the fourth control valve.
Therefore, in order to ensure that the secondary circulation loop has enough air quantity, the air flowing out of the secondary circulation loop is supplemented by arranging the air supplementing fan, and the normal operation of the secondary circulation loop is further ensured.
According to a further scheme, the circulating self-concentration system further comprises a dust remover, the dust remover is installed on the sixth pipeline and flows along the airflow direction of the sixth pipeline, and the dust remover is communicated between the first air outlet and the second air inlet.
It can be seen from the above that, the dust remover is used for filtering the gas of carrying to low temperature catalytic furnace to impurity such as mixed granule, colloid in the filtering gas prevents that the granule from entering into low temperature catalytic furnace after, to the catalyst destruction in the low temperature catalytic furnace, makes the catalyst inefficacy, still avoids simultaneously that the colloid is lighted after entering into low temperature catalytic furnace, prevents to appear the production accident.
In a further aspect, the self-concentrating circulation system further comprises a flame arrester mounted on the sixth conduit and flowing along the flow of the gas in the sixth conduit, the flame arrester communicating between the dust collector and the second gas inlet.
Therefore, the flame arrester is used for preventing the flame of inflammable gas and/or inflammable liquid steam from spreading to the low-temperature catalytic furnace, so that the safety of the low-temperature catalytic furnace in low-temperature catalytic combustion treatment of volatile organic compounds is ensured, and production accidents are prevented.
In a further aspect, the self-circulation concentration system further includes a sixth control valve, and an eleventh pipeline is connected between an inlet end of the sixth control valve and the first air outlet.
Therefore, the sixth control valve is used as an emergency control valve of the circulating self-concentration system, so that when the secondary circulation loop or the primary circulation loop in the secondary circulation loop fails, the circulating self-concentration system can directly discharge the gas containing the volatile organic compounds in the circulating self-concentration system through the sixth control valve, and the safety of the circulating self-concentration system is ensured.
In a further aspect, the self-circulation concentration system further includes a seventh control valve, the seventh control valve is installed on the fifth pipeline and flows along the air flow direction of the fifth pipeline, and the seventh control valve is communicated between the first air outlet and the inlet end of the fourth control valve.
Therefore, when the circulation self-concentration system has a fault, the seventh control valve can prevent the gas containing the volatile organic compounds in the circulation self-concentration system from entering the low-temperature catalytic furnace by part or all of the gas before the gas is discharged from the circulation self-concentration system through the sixth control valve, so that the safety of the circulation self-concentration system is further ensured.
According to a further scheme, the circulating self-concentration system further comprises an eighth control valve, the eighth control valve is installed on the sixth pipeline and flows along the airflow direction of the sixth pipeline, and the eighth control valve is communicated between the first air outlet and the dust remover.
From the above, when the circulation is from the concentrated system trouble, the eighth control valve can prevent that the gas that contains volatile organic compounds in the circulation from the concentrated system appears some or whole gas and gets into second grade circulation return circuit before discharging the circulation from the concentrated system through the sixth control valve to further guarantee the security of circulation from the concentrated system.
In a further scheme, the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline and the seventh pipeline are all heat-insulating pipelines.
Therefore, when the gas containing the volatile organic compounds circulates in each circulation loop, the heat loss in the gas is better avoided, so that the gas is not required to be heated or the heating time of the gas is reduced, the effect of saving energy consumption is achieved, and the production and operation cost can be further reduced.
In a further embodiment, the number of primary circulation circuits is two to ten.
From the above, the number of the first-stage circulation loops can be adjusted according to the use requirement, the design requirement and the like of the circulating self-concentration system.
Drawings
Fig. 1 is a system schematic diagram of the present invention of a circulating self-concentration system.
Fig. 2 is an enlarged view at a in fig. 1.
Fig. 3 is an enlarged view at B in fig. 1.
The present invention will be further explained with reference to the drawings and examples.
Detailed Description
Example of a circulating self-concentration system:
the utility model provides a circulation is used for carrying out the concentrated processing to the Volatile Organic Compounds (VOCs) that produce among the printing machine printing process from concentrated system to carry out low temperature catalytic combustion to the gas that contains volatile organic compounds after the concentrated processing and handle, so that discharge after volatile organic compounds are carbon dioxide and water by catalytic cracking again. Referring to fig. 1, the circulation self-concentration system 100 includes a secondary circulation circuit 1, a low-temperature catalytic furnace 2, a heat exchange device 3, an air supply fan 5, a dust remover 6, a flame arrester 7, a sixth control valve 81, a seventh control valve 82, an eighth control valve 83, and an exhaust fan 91.
Referring to fig. 2, the secondary circulation circuit 1 includes a first fan 11, a primary circulation circuit 12, a fourth pipe 13, a fifth pipe 14, a second control valve 15, a third control valve 16, and a fourth control valve 17, wherein the number of the primary circulation circuits 12 is preferably two to ten, and in the present embodiment, the number of the primary circulation circuits 12 is ten, and each of the primary circulation circuits 12 establishes a circulation circuit with the first fan 11.
Referring to fig. 3, each primary circulation circuit 12 includes a printer 121, a second fan 122, a third fan 123, a first pipe 124, a second pipe 125, a third pipe 126, a first control valve 127, a sixth pipe 18, and a ninth control valve 19. A first air outlet of the oven of the printer 121 is connected to a second air inlet of the second fan 122 through a first pipeline 124, a second air outlet of the second fan 122 is connected to a third air inlet of the third fan 123 through a second pipeline 125, a third air outlet of the third fan 123 is connected to a first air inlet of the oven of the printer 121 through a third pipeline 126, and a first control valve 127 is installed on the second pipeline 125, where the first control valve 127 is used for controlling a flow rate in the second pipeline 125 by controlling an opening degree thereof. Preferably, the first control valve 127 is a manual air valve; of course, the first control valve 127 may be an electric air valve.
The first air inlet of the first fan 11 is connected to the second air outlet of the second fan 122 of each primary circulation loop 12 through the fourth pipeline 13, that is, the air discharged from the second fan 122 can be divided into two air flows to enter the second pipeline 125 and the first fan 11, respectively. The number of the second control valves 15 is equal to the number of the primary circulation loops 12, the second control valves 15 are installed on the fourth pipeline 13, one second control valve 15 is arranged corresponding to one primary circulation loop 12, the second control valve 15 is used for controlling the flow rate of the gas output to the fourth pipeline 13 from the corresponding one primary circulation loop 12 by controlling the opening degree of the second control valve 15, and then the flow rate of the gas respectively discharged to the second pipeline 125 and the first fan 11 by the second fan 122 is adjusted by matching with the first control valve 127. Preferably, the second control valve 15 is an electric air valve; of course, the second control valve 15 may be a manual air valve.
In addition, the first air outlet of the first fan 11 is connected to the third air inlet of the third fan 123 of each primary circulation loop 12 through the fifth pipeline 14, and the first air outlet of the first fan 11 is further connected to the second air inlet of the low-temperature catalytic furnace 2 through the sixth pipeline 18, so that the air discharged by the first fan 11 can be divided into two air flows to enter the fifth pipeline 14 and the low-temperature catalytic furnace 2, respectively. Wherein the number of the third control valves 16 is equal to the number of the primary circulation circuits 12, the third control valves 16 are installed on the fifth pipeline 14, one third control valve 16 is arranged corresponding to one primary circulation circuit 12, and the third control valve 16 is used for controlling the flow rate of the gas entering one primary circulation circuit 12 corresponding to the third control valve 16 from the fifth pipeline 14 through the opening degree of the third control valve 16. A fourth control valve 17 is installed on the fifth pipeline 14 and is along the flow direction of the gas flow in the fifth pipeline 14, the fourth control valve 17 is located at the upstream end of the third control valve 16, and the fourth control valve 17 is used for controlling the flow rate of the gas entering the fifth pipeline 14 by controlling the opening degree of the fourth control valve 17; a ninth control valve 19 is installed on the sixth pipeline 18, and the ninth control valve 19 is used for controlling the flow rate of the gas entering the sixth pipeline 18 by controlling the opening degree of the ninth control valve 19, that is, the fourth control valve 17 and the ninth control valve 19 cooperate with each other to adjust the proportion of the gas discharged from the first fan 11 to the fifth pipeline 14 and the low-temperature catalytic furnace 2. Preferably, the third control valve 16, the fourth control valve 17 and the ninth control valve 19 are all electric air valves; of course, at least one of the third control valve 16, the fourth control valve 17, or the ninth control valve 19 may also be a manual air valve.
It can be seen that a part of the volatile organic compounds generated during the printing process of the printing machine 121 is internally circulated in the primary circulation loop 12 through the second fan 122, the third fan 123, the first pipeline 124, the second pipeline 125 and the third pipeline 126 of the primary circulation loop 12, so that the part of the volatile organic compounds continuously enters the gas of the primary circulation loop 12 for primary concentration treatment; and the other part of the volatile organic compounds is circulated outside the primary circulation loop 12 through the first fan 11, the fourth pipeline 13, the fifth pipeline 14 and the primary circulation loop 12, so that the part of the volatile organic compounds is continuously mixed with the volatile organic compounds in the gas discharged from the other primary circulation loop 12 to carry out secondary concentration treatment. In addition, a part of volatile organic compounds in the external circulation loop enter the low-temperature catalytic furnace 2 through a sixth pipeline 18 for low-temperature catalytic combustion treatment and then are discharged; the remaining part of the volatile organic compounds re-enters each primary circulation loop 12 through the fifth pipeline 14 to participate in the internal circulation concentration treatment of the entered primary circulation loop 12 again, and the volatile organic compounds generated in the printing process of the printer 121 are subjected to concentration treatment in such a reciprocating way.
The heat exchange device 3 is provided with a heat exchange bin, a heat exchanger, an eighth pipeline 31, a ninth pipeline 32 and a fifth control valve 33, the heat exchanger is arranged in the heat exchange bin and is provided with a hot gas inlet and a hot gas outlet, and the heat exchanger is provided with a cold gas inlet and a cold gas outlet. And a hot gas inlet of a heat exchange bin of the heat exchange device 3 is communicated with a second gas outlet of the low-temperature catalytic furnace 2 through a seventh pipeline 4.
The cold air inlet of the heat exchanger of the heat exchanging device 3 is connected with the inlet end of the fourth control valve 17 through an eighth pipeline 31, that is, the cold air inlet of the heat exchanger of the heat exchanging device 3 is connected with the fifth pipeline 14 through the eighth pipeline 31 and flows along the airflow direction of the fifth pipeline 14, and the communication position of the eighth pipeline 31 and the fifth pipeline 14 is located at the upstream end of the inlet end of the fourth control valve 17. The cold air outlet of the heat exchanger of the heat exchange device 3 is connected with the outlet end of the fourth control valve 17 through a ninth pipeline 32, that is, the cold air outlet of the heat exchanger of the heat exchange device 3 is connected with the fifth pipeline 14 through the ninth pipeline 32 and flows along the airflow of the fifth pipeline 14, and the communication position of the ninth pipeline 32 and the fifth pipeline 14 is located at the downstream end of the outlet end of the fourth control valve 17.
A fifth control valve 33 is installed on the eighth pipe 31, and the fifth control valve 33 controls the flow rate in the eighth pipe 31 by controlling the opening degree thereof. Wherein the fifth control valve 33 cooperates with the fourth control valve 17 to control the gas flow in the fifth duct 14 to continue through the fourth control valve 17 to the respective third control valve 16 and/or through the eighth duct 31, the ninth duct 32 and the fifth control valve 33 to the respective third control valve 16 and to adjust the proportion of gas entering the fifth duct 14 into the fourth control valve 17 and the fifth control valve 33.
Because the volatile organic compounds after the low-temperature catalytic combustion of the low-temperature catalytic furnace 2 can emit a large amount of heat and mix into the discharged gas, therefore, by arranging the heat exchange device 3, the heat exchange is carried out between the discharged gas after the low-temperature catalytic combustion treatment and the gas containing the volatile organic compounds in the external circulation loop in the heat exchange device 3, so that the temperature of the gas in the external circulation loop is kept in a proper state, and further, after the gas in the external circulation loop enters the oven of the printing machine 121 of the primary circulation loop 12, the oven is not needed to heat the part of gas or the time for heating the part of gas by the oven is reduced, and the effect of saving energy consumption is further played, so that the production and operation cost is reduced.
A fourth air outlet of the air supply fan 5 is connected with the fifth pipeline 14 through a tenth pipeline 51, and a fourth air inlet of the air supply fan 5 is communicated with the ground exhaust system through a twelfth pipeline 52. Preferably, in the gas flow direction of the fifth duct 14, the place where the tenth duct 51 communicates with the fifth duct 14 is located at the upstream end of the place where the eighth duct 31 communicates with the fifth duct 14. Because part of the gas in the secondary circulation loop 1 enters the low-temperature catalytic furnace 2 through the sixth pipeline 18 for low-temperature catalytic combustion treatment, so that the air volume in the secondary circulation loop 1 is lost, in order to ensure that the secondary circulation loop 1 only has enough air volume, the air supplementing fan 5 is arranged to supplement the gas flowing out of the secondary circulation loop 1, thereby ensuring the normal operation of the secondary circulation loop 1.
The dust remover 6 is arranged on the sixth pipeline 18, and along the airflow direction of the sixth pipeline 18, the dust remover 6 is communicated between the first air outlet of the first fan 11 and the second air inlet of the low-temperature catalytic furnace 2. The dust remover 6 is used for filtering the gas conveyed to the low-temperature catalytic furnace 2 in the sixth pipeline 18 to filter out impurities such as particles, colloid and the like mixed in the gas, so that after the particles enter the low-temperature catalytic furnace 2, the catalyst in the low-temperature catalytic furnace 2 is prevented from being damaged, the catalyst is made to lose efficacy, and meanwhile, the colloid can be prevented from being ignited after entering the low-temperature catalytic furnace 2, and production accidents are prevented.
The flame arrester 7 is arranged on the sixth pipeline 18 and flows along the airflow direction of the sixth pipeline 18, and the flame arrester 7 is communicated between the dust remover 6 and the second air inlet of the low-temperature catalytic furnace 2. The flame arrester 7 is used for preventing the flame of inflammable gas and/or inflammable liquid steam from spreading to the low-temperature catalytic furnace 2, so that the safety of the low-temperature catalytic furnace 2 in the low-temperature catalytic combustion treatment of volatile organic compounds is ensured, and production accidents are prevented.
The inlet end of the sixth control valve 81 is connected with the air outlet of the first fan 11 through the eleventh pipe 811, and the sixth control valve 81 is used as an emergency control valve of the circulation self-concentration system 100, so that when the secondary circulation loop 1 or the primary circulation loop 12 in the secondary circulation loop 1 fails, the circulation self-concentration system 100 can directly discharge the gas containing the volatile organic compounds therein through the sixth control valve 81, thereby ensuring the safety of the circulation self-concentration system 100. Preferably, the sixth control valve 81 is an electric air valve; of course, a manual air valve may be used as the sixth control valve 81.
The seventh control valve 82 is installed on the fifth pipeline 14, and along the airflow direction of the fifth pipeline 14, the seventh control valve 82 is communicated between the first air outlet of the first fan 11 and the communication position of the tenth pipeline 51 and the fifth pipeline 14. When the circulation self-concentration system 100 is in failure, the seventh control valve 82 can prevent part or all of the gas containing the volatile organic compounds circulated from the concentration system 100 from entering the low-temperature catalytic furnace 2 before the gas is discharged from the circulation self-concentration system 100 through the sixth control valve 81, thereby further ensuring the safety of the circulation self-concentration system 100. Preferably, the sixth control valve 81 is a manual air valve; of course, an electric air valve may be used as the sixth control valve 81.
The eighth control valve 83 is installed on the sixth pipeline 18 and along the airflow direction of the sixth pipeline 18, and the eighth control valve 83 is communicated between the air outlet of the first fan 11 and the dust remover 6. When the circulation self-concentration system 100 is in failure, the eighth control valve 83 can prevent part or all of the gas containing volatile organic compounds circulating from the concentration system 100 from entering the secondary circulation loop 1 before being discharged from the concentration system 100 through the sixth control valve 81, thereby further ensuring the safety of the circulation self-concentration system 100.
A fifth air inlet of the exhaust fan 91 is connected with a hot air inlet of the heat exchange chamber of the heat exchange device 3 through a thirteenth pipeline 911, and a fifth air outlet of the exhaust fan 91 is connected with the chimney 92 through a fourteenth pipeline 912, so as to pump the exhaust gas after the heat exchange chamber of the heat exchange device 3 is subjected to heat exchange and low-temperature catalytic combustion treatment to the chimney 92 and discharge the exhaust gas to the atmosphere.
In addition, in this embodiment, the first pipeline 124, the second pipeline 125, the third pipeline 126, the fourth pipeline 13, the fifth pipeline 14 and the seventh pipeline 4 are heat preservation pipelines, so that when the gas containing volatile organic compounds circulates in each circulation loop, heat loss in the gas is better avoided, so that the gas does not need to be heated or the heating time of the gas is reduced, the effect of saving energy consumption is achieved, and the production and operation cost can be further reduced.
To sum up, the utility model discloses a structural design from concentrated system to the circulation, make the volatile organic compounds that produces among the printing machine printing process constantly concentrated by the one-level circulation circuit of second grade circulation circuit and second grade circulation circuit, make the concentration multiplying power of volatile organic compounds can reach 3 times to 20 times, and low temperature catalytic furnace then carries out low temperature catalytic combustion to the volatile organic compounds after being concentrated and handles, discharge again after for carbon dioxide and water with the volatile organic compounds catalytic cracking in the gas, the problem that needs to consume a large amount of natural gas when having solved the mode of current adoption direct combustion and handling volatile organic compounds, still solved simultaneously because the gas temperature who discharges is higher and can't carry out concentrated problem to the volatile organic compounds in the gas, thereby by a wide margin reduction production running cost.
Finally, it should be emphasized that the above-described embodiments are merely preferred examples of the present invention, and are not intended to limit the invention, as those skilled in the art will appreciate that various changes and modifications may be made, and any and all modifications, equivalents, and improvements made, while remaining within the spirit and principles of the present invention, are intended to be included within the scope of the present invention.
Claims (10)
1. A circulating self-concentration system for treating printing waste gas is characterized by comprising
A secondary circulation loop comprising a first fan and more than two primary circulation loops, the primary circulation loop comprises a printing machine, a second fan and a third fan, a first pipeline is connected between a first air outlet of an oven of the printing machine and a second air inlet of the second fan, a second pipeline is connected between the second air outlet of the second fan and the third air inlet of the third fan, a first control valve is arranged on the second pipeline, a third pipeline is connected between a third air outlet of the third fan and the first air inlet of the oven, a fourth pipeline is connected between the first air inlet and the second air outlet of the first fan, a second control valve is arranged on the fourth pipeline, a fifth pipeline is connected between the first air outlet of the first fan and the third air inlet, and a third control valve is arranged on the fifth pipeline;
and a sixth pipeline is connected between the second air inlet of the low-temperature catalytic furnace and the first air outlet.
2. The circulating self-concentrating system of claim 1, wherein:
the circulating self-concentration system also comprises a heat exchange device, and a seventh pipeline is connected between a second air outlet of the low-temperature catalytic furnace and a hot air inlet of the heat exchange device;
still be provided with the fourth control valve on the fifth pipeline, be connected with the eighth pipeline between heat transfer device's air conditioning import and the entrance point of fourth control valve, be provided with the fifth control valve on the eighth pipeline, heat transfer device's air conditioning export with be connected with the ninth pipeline between the exit end of fourth control valve.
3. The circulating self-concentrating system of claim 2, wherein:
the circulating self-concentration system also comprises an air supplementing fan, and a tenth pipeline is connected between a fourth air outlet of the air supplementing fan and the fifth pipeline;
and the communication part of the tenth pipeline and the fifth pipeline is positioned between the first air outlet and the inlet end of the fourth control valve.
4. The circulating self-concentrating system of claim 3, wherein:
the circulating self-concentration system further comprises a dust remover, the dust remover is installed on the sixth pipeline and flows along the airflow direction of the sixth pipeline, and the dust remover is communicated between the first air outlet and the second air inlet.
5. The circulating self-concentrating system of claim 4, wherein:
the circulating self-concentration system further comprises a flame arrester, the flame arrester is installed on the sixth pipeline and flows along the airflow direction of the sixth pipeline, and the flame arrester is communicated between the dust remover and the second air inlet.
6. The circulating self-concentrating system of claim 5, wherein:
the circulating self-concentration system further comprises a sixth control valve, and an eleventh pipeline is connected between the inlet end of the sixth control valve and the first air outlet.
7. The circulating self-concentrating system of claim 6, wherein:
the circulating self-concentration system further comprises a seventh control valve, the seventh control valve is installed on the fifth pipeline and flows along the airflow direction of the fifth pipeline, and the seventh control valve is communicated between the first air outlet and the inlet end of the fourth control valve.
8. The circulating self-concentrating system of claim 7, wherein:
the circulating self-concentration system further comprises an eighth control valve, the eighth control valve is installed on the sixth pipeline and flows along the airflow direction of the sixth pipeline, and the eighth control valve is communicated between the first air outlet and the dust remover.
9. The circulating self-concentrating system of any one of claims 2 to 8, wherein:
the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline and the seventh pipeline are all heat-insulating pipelines.
10. The circulating self-concentrating system of any one of claims 1 to 8, wherein:
the number of the primary circulation loops is two to ten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023170629.0U CN214468683U (en) | 2020-12-24 | 2020-12-24 | Circulation of administering printing waste gas is from concentrated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023170629.0U CN214468683U (en) | 2020-12-24 | 2020-12-24 | Circulation of administering printing waste gas is from concentrated system |
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| Publication Number | Publication Date |
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| CN214468683U true CN214468683U (en) | 2021-10-22 |
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| CN202023170629.0U Active CN214468683U (en) | 2020-12-24 | 2020-12-24 | Circulation of administering printing waste gas is from concentrated system |
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2020
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