CN217604125U

CN217604125U - VOCs exhaust-gas treatment system

Info

Publication number: CN217604125U
Application number: CN202121490106.6U
Authority: CN
Inventors: 龙志
Original assignee: Guangzhou Zunji Environmental Protection Technology Co ltd
Current assignee: Guangzhou Zunji Environmental Protection Technology Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-10-18
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to an exhaust-gas treatment technical field discloses a VOCs exhaust-gas treatment system, it is including setting gradually the desorption fan on the desorption return circuit, the adsorber, heat exchanger and catalytic combustion ware, the first input port and the adsorber of heat exchanger are linked together, the first delivery outlet of heat exchanger is linked together with catalytic combustion ware's entry, catalytic combustion ware's export is linked together with the second input port of heat exchanger, the second delivery outlet and the desorption fan of heat exchanger are linked together, be equipped with the stop valve that is located between heat exchanger and the desorption fan on the desorption return circuit, exhaust pipe has been drawn forth between heat exchanger and the stop valve, be equipped with first governing valve on the exhaust pipe, the desorption return circuit has accessed the inlet line between stop valve and desorption fan, be equipped with the second governing valve on the inlet line. Based on this, this VOCs exhaust-gas treatment system has cancelled the air supply machine, directly adopts desorption fan negative pressure suction hot gas stream and cold air current simultaneously, and the desorption air current is comparatively stable, and the desorption effect of desorbent is better.

Description

VOCs exhaust-gas treatment system

Technical Field

The utility model relates to an exhaust-gas treatment technical field especially relates to a VOCs exhaust-gas treatment system.

Background

VOCs (volatile organic compounds) are organic compounds emitted in industrial production processes, have strong volatility, diffusivity and chemical toxicity, and once discharged into the atmosphere, seriously pollute the environment and threaten the health of people, so that various feasible means are adopted for purifying and removing the VOCs. As a large country in manufacturing industry, china bears most of global productivity in the heavy pollution industries of VOCs such as bulk drug manufacturing, synthetic leather, flexible package printing, electronic terminal product manufacturing, artificial boards, fiber boards, wooden furniture manufacturing, chemical fibers, shipbuilding, container manufacturing, coal chemical industry, pesticide manufacturing and the like, and the total discharge amount of the VOCs is huge and the treatment task is difficult.

Due to huge market demand, the VOCs treatment technology in China is rapidly developed in recent years. Mainstream treatment technologies such as adsorption technologies, incineration technologies and catalytic technologies are continuously developed and improved, the application range of biological treatment technologies is continuously widened, and new treatment technologies such as normal-temperature catalytic oxidation technologies, low-temperature plasma technologies, photolysis technologies, photocatalytic technologies and the like are also continuously improved.

At present, a VOCs waste gas treatment system generally comprises a catalytic combustor, a heat exchanger, a desorption fan and a fan for supplementing air in order to perform desorption and regeneration on an adsorbent, wherein hot air flow passing through the heat exchanger and cold air flow supplemented by the fan are mixed to form desorption hot air flow with a target temperature, and the desorption hot air flow enters an adsorber to perform desorption and regeneration on the adsorbent. The existing VOCs waste gas treatment system adopts the air supply fan to supply cold air, and the air supply fan can change the air pressure of cold air flow while changing the flow of the cold air flow, so that the air pressure is unstable when hot air flow and the cold air flow are mixed, and even the cold air flow flows back into a hot air flow pipeline or the hot air flow flows back into the cold air flow pipeline, so that the desorption air flow is unstable, and the desorption effect is influenced. In addition, because the desorption fan and the air supplement fan which meet the explosion-proof requirement are adopted at the same time, the equipment cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a VOCs exhaust-gas treatment system that desorption effect is good, equipment cost is low.

In order to realize the above-mentioned purpose, the utility model provides a VOCs exhaust-gas treatment system, it is including setting gradually desorption fan, adsorber, heat exchanger and the catalytic combustor on the desorption return circuit, the first input port of heat exchanger with the adsorber is linked together, the first delivery outlet of heat exchanger with the entry of catalytic combustor is linked together, the export of catalytic combustor with the second input port of heat exchanger is linked together, the second delivery outlet of heat exchanger with the desorption fan is linked together, be equipped with in the desorption return circuit and be located the heat exchanger with stop valve between the desorption fan, the heat exchanger with exhaust pipe has been drawn forth between the stop valve, exhaust pipe is last to be equipped with first governing valve, the desorption return circuit is in the stop valve with it has the air inlet pipeline to insert between the desorption fan, be equipped with the second governing valve on the air inlet pipeline.

In some embodiments of the application, a mixer between the stop valve and the desorption fan is arranged on the desorption loop, and the air inlet pipeline is connected to the mixer.

In some embodiments of the present application, a dust remover is provided on the intake pipe, and the dust remover is provided on a downstream side of the second regulating valve.

In some embodiments of the present application, the number of the adsorbers is two, and two of the adsorbers are disposed in parallel on the desorption circuit.

In some embodiments of the present application, the adsorber further comprises an exhaust fan, and the exhaust fan is communicated with the adsorber through an adsorption pipeline.

In some embodiments of the present application, an exhaust gas collector is disposed on the adsorption pipeline, and the exhaust gas collector is located on an upstream side of the adsorber.

In some embodiments of the present application, a sprayer is disposed on the adsorption pipeline, and the sprayer is located between the exhaust gas collector and the adsorber.

In some embodiments of the present application, an ozone generation unit is disposed on the adsorption pipeline, and the ozone generation unit is located between the sprayer and the adsorber.

The utility model provides a VOCs exhaust-gas treatment system compares with prior art, and its beneficial effect lies in:

the utility model provides a VOCs exhaust-gas treatment system is including setting gradually the desorption fan on the desorption return circuit, the adsorber, heat exchanger and catalytic combustor, the first input port and the adsorber of heat exchanger are linked together, the first delivery outlet of heat exchanger is linked together with catalytic combustor's entry, catalytic combustor's export is linked together with the second input port of heat exchanger, the second delivery outlet and the desorption fan of heat exchanger are linked together, be equipped with the stop valve that is located between heat exchanger and the desorption fan in the desorption return circuit, exhaust pipe has been drawn forth between heat exchanger and the stop valve, be equipped with first governing valve on the exhaust pipe, the desorption return circuit has inserted the air inlet line between stop valve and desorption fan, be equipped with the second governing valve on the air inlet line. Based on the structure, the VOCs waste gas treatment system cancels a fan supplementing machine, directly adopts a desorption fan to simultaneously suck hot air flow and cold air flow in a negative pressure manner, adjusts the proportion of the hot air flow and the cold air flow through the opening degrees of the first regulating valve and the second regulating valve so as to control the temperature of the desorption air flow, ensures that the air pressure is stable when the hot air flow and the cold air flow are mixed, prevents the cold air flow from flowing back into a hot air flow pipeline or prevents the hot air flow from flowing back into a cold air flow pipeline, namely ensures that the desorption air flow is stable, and has better desorption effect of a desorption agent; and secondly, the equipment cost is lower due to the elimination of the air supplement fan. In addition, when desorption airflow after desorption enters the catalytic combustor, the temperature needs to be raised to a preset temperature, so that the VOCs can be subjected to catalytic combustion, and the catalytic combustion VOCs can generate large heat.

Drawings

Fig. 1 is the utility model discloses the overall structure of VOCs exhaust-gas treatment system of embodiment schematically.

In the figure: 1. a desorption fan; 2. an adsorber; 3. a heat exchanger; 4. a catalytic combustor; 5. a mixer; 6. a dust remover; 7. an exhaust fan; 8. an exhaust gas collector; 9. a sprayer; 10. a desorption loop; 101. a stop valve; 20. an exhaust line; 201. a first regulating valve; 30. an air intake line; 301. a second regulating valve; 40. an adsorption pipeline.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that in the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, i.e. a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Further, unless otherwise specified, "a plurality" means two or more.

It should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

As shown in fig. 1, the embodiment of the utility model provides a VOCs exhaust treatment system, it is including setting gradually desorption fan 1 on desorption return circuit 10, adsorber 2, heat exchanger 3 and catalytic combustion ware 4, the first input port of heat exchanger 3 is linked together with adsorber 2, the first delivery outlet of heat exchanger 3 is linked together with catalytic combustion ware 4's entry, catalytic combustion ware 4's export is linked together with heat exchanger 3's second input port, heat exchanger 3's second delivery outlet is linked together with desorption fan 1, be equipped with the stop valve 101 that is located between heat exchanger 3 and the desorption fan 1 on the desorption return circuit 10, exhaust pipe 20 has been drawn forth between heat exchanger 3 and the stop valve 101, be equipped with first governing valve 201 on exhaust pipe 20, desorption return circuit 10 has accessed air inlet pipeline 30 between stop valve 101 and desorption fan 1, be equipped with second governing valve 301 on air inlet pipeline 30.

Based on the structure, the VOCs waste gas treatment system cancels the air supplement machine, directly adopts the desorption fan 1 to simultaneously suck hot air flow and cold air flow in a negative pressure mode, adjusts the proportion of the hot air flow and the cold air flow through the opening degree of the first regulating valve 201 and the second regulating valve 301 so as to control the temperature of the desorption air flow, enables the air pressure to be stable when the hot air flow and the cold air flow are mixed, prevents the cold air flow from flowing back into a hot air flow pipeline or prevents the hot air flow from flowing back into a cold air flow pipeline, namely, enables the desorption air flow to be stable, and has a good desorption effect of a desorption agent; and secondly, the equipment cost is lower due to the elimination of the air supplement fan. In addition, when desorption airflow after desorption enters the catalytic combustor 4, the temperature needs to be raised to a preset temperature, so that the VOCs can be subjected to catalytic combustion, and the catalytic combustion VOCs can generate large heat, so that the VOCs waste gas treatment system performs heat exchange and temperature rise on low-temperature airflow which is about to enter the catalytic combustor 4 in the heat exchanger 3 by utilizing high-temperature airflow discharged from the catalytic combustor 4, the energy efficiency is improved, the heat recovery and reutilization are realized, and the environment friendliness and the energy conservation are realized.

Alternatively, as shown in fig. 1, in the present embodiment, a mixer 5 is provided on the desorption circuit 10 between the stop valve 101 and the desorption fan 1, and the air inlet line 30 is connected to the mixer 5. Based on this, the cold air flow and the hot air flow are mixed in the mixer 5, and the mixing is relatively uniform and sufficient.

Alternatively, as shown in fig. 1, in the present embodiment, the air intake pipe 30 is provided with the dust remover 6, and the dust remover 6 is provided on the downstream side of the second regulating valve 301. Based on this, can remove dust to the cold air current before getting into blender 5, prevent that the impurity in the air from getting into this VOCs exhaust-gas treatment system.

Alternatively, as shown in fig. 1, in the present embodiment, two adsorbers 2 are provided, and two adsorbers 2 are provided in parallel on the desorption circuit 10. So, can realize need not the outage at 2 this VOCs processing apparatus of an adsorber in order to change the adsorbent, can realize keeping one of them adsorber 2 and carrying out the desorption regeneration to the adsorbent in another adsorber 2 when carrying out the VOCs absorption, possess the function of going on simultaneously of adsorption and desorption regeneration, VOCs's treatment effeciency is higher, and VOCs's desorption effect is better.

Optionally, as shown in fig. 1, in the present embodiment, an exhaust fan 7 is further included, and the exhaust fan 7 is communicated with the adsorber 2 through an adsorption pipeline 40. Therefore, the exhaust fan 7 sucks the waste gas treated by the desorption agent to return to the chimney, and the emission of the waste gas reaching the standard is completed.

Alternatively, as shown in fig. 1, in the present embodiment, the adsorption line 40 is provided with an exhaust gas collector 8, and the exhaust gas collector 8 is located on the upstream side of the adsorber 2.

Alternatively, as shown in fig. 1, in the present embodiment, a sprayer 9 is provided on the adsorption pipeline 40, and the sprayer 9 is located between the exhaust gas collector 8 and the adsorber 2. Based on this, the shower 9 can remove dust to the waste gas before entering the adsorber 2, prevents that the dust from weakening the adsorption effect of adsorbent after entering the adsorber 2.

Alternatively, as shown in fig. 1, in the present embodiment, an ozone generating unit is disposed on the adsorption pipeline 40, and the ozone generating unit is located between the sprayer 9 and the adsorber 2. So, the ozone that ozone generation unit produced can carry out preliminary desorption to the VOCs in the waste gas, and adsorber 2 carries out the secondary desorption to VOCs to further optimized VOCs's desorption effect.

The embodiment of the utility model provides a VOCs exhaust-gas treatment system's working process does: the waste gas discharged from the chimney is dedusted by a sprayer 9, then VOCs are preliminarily removed by an ozone generation unit, the waste gas enters an adsorber 2 for adsorption to remove the VOCs, and the waste gas after the VOCs are removed returns to the chimney through an exhaust fan 7; when the adsorbent in the adsorber 2 needs desorption and regeneration, the desorbed gas flows through the heat exchanger 3 and enters the catalytic combustor 4 for catalytic combustion after being heated, the flow of the hot gas flow discharged by the catalytic combustor 4 is controlled by the first regulating valve 201, the flow of the cold gas flow in the gas inlet pipeline 30 is controlled by the second regulating valve 301, the hot gas flow and the cold gas flow are simultaneously sucked in a negative pressure manner by the desorption fan 1, the hot gas flow and the cold gas flow are mixed in the mixer 5 and then enter the adsorber 2 to desorb the adsorbent, and VOCs removed from the adsorbent are carried back to the catalytic combustor 4 again.

To sum up, the embodiment of the utility model provides a VOCs exhaust-gas treatment system, it is mainly by setting gradually desorption fan 1 on desorption return circuit 10, adsorber 2, heat exchanger 3 and catalytic combustor 4 constitute, the first input port and the adsorber 2 of heat exchanger 3 are linked together, the first delivery outlet of heat exchanger 3 is linked together with catalytic combustor 4's entry, the export of catalytic combustor 4 is linked together with the second input port of heat exchanger 3, the second delivery outlet and the desorption fan 1 of heat exchanger 3 are linked together, be equipped with the stop valve 101 that is located between heat exchanger 3 and the desorption fan 1 on the desorption return circuit 10, exhaust pipe 20 has been drawn forth between heat exchanger 3 and the stop valve 101, be equipped with first governing valve 201 on exhaust pipe 20, desorption return circuit 10 has accessed air inlet pipe 30 between stop valve 101 and desorption fan 1, be equipped with second governing valve 301 on air inlet pipe 30. Compared with the prior art, the VOCs waste gas treatment system has the advantages of good desorption effect, low equipment cost and the like.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a VOCs exhaust-gas treatment system, its characterized in that, including setting gradually desorption fan, adsorber, heat exchanger and the catalytic combustor on the desorption return circuit, the first input port of heat exchanger with the adsorber is linked together, the first delivery outlet of heat exchanger with the entry of catalytic combustor is linked together, the export of catalytic combustor with the second input port of heat exchanger is linked together, the second delivery outlet of heat exchanger with the desorption fan is linked together, be equipped with in the desorption return circuit and be located the heat exchanger with stop valve between the desorption fan, the heat exchanger with exhaust pipe has been drawn forth between the stop valve, be equipped with first governing valve on the exhaust pipe, the desorption return circuit is in the stop valve with it has the pipeline of admitting air to insert between the desorption fan, be equipped with the second governing valve on the pipeline of admitting air.

2. The VOCs exhaust treatment system of claim 1, wherein a mixer is disposed in the desorption loop between the shutoff valve and the desorption blower, and the inlet line is connected to the mixer.

3. The VOCs exhaust treatment system of claim 1, wherein a dust separator is disposed in the inlet line downstream of the second regulator valve.

4. The system of claim 1 wherein there are two adsorbers and two adsorbers are disposed in parallel on the desorption circuit.

5. The VOCs exhaust treatment system of claim 1, further comprising an exhaust blower in communication with the adsorber via an adsorption line.

6. The VOCs exhaust treatment system of claim 5, wherein an exhaust trap is disposed on the adsorption line, the exhaust trap being located upstream of the adsorber.

7. The VOCs exhaust treatment system of claim 6, wherein a sprayer is disposed on the adsorption line between the exhaust collector and the adsorber.

8. The system of claim 7, wherein the adsorption line has an ozone generating unit disposed between the shower and the adsorber.