CN115164220A - Heat exchange catalytic combustion furnace for VOCs treatment in industrial production - Google Patents

Abstract

The invention belongs to the technical field of organic waste gas treatment devices, and particularly relates to a heat exchange catalytic combustion furnace for treating VOCs in industrial production; the device comprises a heat exchanger A, a heat exchanger B, a catalytic reaction device and an exhaust system; the waste gas discharge port of the production unit is communicated with the gas inlet of the catalytic reaction device through a heat exchanger A, the gas outlet of the catalytic reaction device is communicated with the hot fluid inlet of the heat exchanger A through a heat exchanger B, and the hot fluid outlet of the heat exchanger A is communicated with the gas inlet end of the exhaust system; the medium pipeline is communicated to the production unit through the heat exchanger B. The exhaust system in this heat transfer catalytic combustion stove pumps the organic waste gas that the production unit produced to catalytic reaction device in and handles, and organic waste gas can release a large amount of heat energy at the reaction, and this part heat energy can be along with the gas after the purification passes through heat exchanger C, heat exchanger B and heat exchanger A in proper order to heat the used medium heat of production unit and organic waste gas, thereby the effectual loss that reduces the energy.

Description

Heat exchange catalytic combustion furnace for VOCs treatment in industrial production

Technical Field

The invention belongs to the technical field of organic waste gas treatment devices, and particularly relates to a heat exchange catalytic combustion furnace for treating VOCs in industrial production.

Background

At present, the atmospheric pollution conditions in various parts of China are not optimistic, especially the pollution of VOCs organic waste gas.

In the prior art, organic waste gas generated in daily production and processing of industrial enterprises is easy to react with nitrogen oxides in the atmosphere to generate ozone, photochemical smog is formed, and harmful effects on human health are generated, so that the treatment of the organic waste gas is highly regarded by various countries.

However, the existing organic waste gas treatment device generates a large amount of heat energy when treating the organic waste gas, and many organic waste gas treatment devices do not reasonably arrange and use the part of heat energy, so that the part of heat energy is directly discharged to the external environment along with the purified air, which causes a large amount of energy loss. Therefore, it is an urgent technical problem to be solved by those skilled in the art to invent an organic waste gas treatment device capable of reasonably utilizing the heat energy generated during the reaction of the organic waste gas.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a heat exchange catalytic combustion furnace for treating VOCs in industrial production, so as to solve the technical problem that a large amount of energy is wasted because an organic waste gas treatment device in the prior art cannot recycle heat energy generated in the organic waste gas reaction.

The invention is realized by the following technical scheme:

a heat exchange catalytic combustion furnace for treating VOCs in industrial production comprises a heat exchanger A, a heat exchanger B, a heat exchanger C, a catalytic reaction device and an exhaust system;

a cold fluid inlet of the heat exchanger A is communicated with a waste gas discharge port of a production unit, a cold fluid outlet of the heat exchanger A is communicated with a cold fluid inlet of the heat exchanger C, a cold fluid outlet of the heat exchanger C is communicated with a gas inlet of the catalytic reaction device, a gas outlet of the catalytic reaction device is communicated with a hot fluid inlet of the heat exchanger C, a hot fluid outlet of the heat exchanger C is communicated with a hot fluid inlet of the heat exchanger B, a hot fluid outlet of the heat exchanger B is communicated with a hot fluid inlet of the heat exchanger A, and a hot fluid outlet of the heat exchanger A is communicated with a gas inlet end of the exhaust system;

and the medium pipeline is communicated to the production unit through the heat exchanger B.

In order to better implement the present invention, the above structure is further optimized, and the heat exchange catalytic combustion furnace further comprises a heating device for heating the organic waste gas, and the cold fluid outlet of the heat exchanger C is communicated with the air inlet of the catalytic reaction device through the heating device.

In order to better implement the invention, the structure is further optimized, and the heating device comprises a heat exchanger D, a heating cavity and a burner; the cold fluid outlet of the heat exchanger C is communicated with the cold fluid inlet of the heat exchanger D, the cold fluid outlet of the heat exchanger D is communicated with the air inlet of the catalytic reaction device, the combustor is arranged in the heating cavity, the air inlet end of the combustor is communicated with an external natural gas pipeline, and the hot fluid inlet of the heat exchanger D and the hot fluid outlet of the heat exchanger D are communicated with the heating cavity.

In order to better implement the invention, the above structure is further optimized, and the heating device comprises a shell and a burner; the shell is provided with a waste gas inlet and a waste gas outlet, a cold fluid outlet of the heat exchanger C is communicated with the waste gas inlet, the waste gas outlet is communicated with a gas inlet of the catalytic reaction device, the combustor is arranged in the shell, and a gas inlet end of the combustor is communicated with an external natural gas pipeline.

In order to better realize the invention, the structure is further optimized, an air supplement valve is arranged on the catalytic reaction device, a temperature sensor A is arranged at an air outlet of the catalytic reaction device, and the air supplement valve and the temperature sensor A are electrically connected with a control part of the catalytic reaction device.

In order to better realize the invention, the structure is further optimized, the heat exchange catalytic combustion furnace further comprises an exhaust gas concentration device, a three-way pipe is arranged at a hot fluid outlet of the heat exchanger C, the hot fluid outlet of the heat exchanger C is respectively communicated with a hot fluid inlet of the heat exchanger B and the exhaust gas concentration device through the three-way pipe, and hot air entering the exhaust gas concentration device is used for desorbing organic exhaust gas in the exhaust gas concentration device.

In order to better implement the invention, the structure is further optimized, and the waste gas concentration device is a zeolite rotating wheel or activated carbon adsorption and desorption equipment.

In order to better realize the invention, the structure is further optimized, the heat exchange catalytic combustion furnace further comprises an exhaust gas channel, and the cold fluid outlet of the heat exchanger A and the concentrated exhaust gas outlet end of the exhaust gas concentrating device are communicated with the cold fluid inlet of the heat exchanger C through the exhaust gas channel.

In order to better implement the invention, the structure is further optimized, and the heat exchange catalytic combustion furnace further comprises a filtering device, wherein an exhaust gas discharge port of a production unit is communicated with a cold fluid inlet of the heat exchanger A through the filtering device.

In summary, the present invention has the following technical effects:

the exhaust system in this heat transfer catalytic combustion stove pumps the organic waste gas that the production unit produced to catalytic reaction device in and handles, and organic waste gas can release a large amount of heat energy at the reaction time, and this part heat energy can be along with the gas after the purification passes through heat exchanger C, heat exchanger B and heat exchanger A in proper order to heat the used medium heat of production unit and organic waste gas, thereby the effectual loss that reduces the energy.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a heat exchange catalytic combustion furnace for VOCs remediation in industrial processes as set forth in example one;

FIG. 2 is a schematic diagram of the heating apparatus of a heat exchange catalytic combustion furnace for VOCs remediation in industrial production as set forth in example one;

FIG. 3 is a schematic diagram of a heat-exchange catalytic combustion furnace for VOCs remediation in industrial production as described in example II;

FIG. 4 is a schematic structural diagram of a heating device in a heat-exchange catalytic combustion furnace for VOCs remediation in industrial production as described in example two.

Reference numerals are as follows:

1. a production unit;

21. a heat exchanger A; 22. a heat exchanger B; 23. a heat exchanger C; 24. heat exchanger D

3. A catalytic reaction device; 31. a wind supplement valve; 32. a temperature sensor A;

4. an exhaust system;

5. a heating device; 51. a housing; 52. a burner; 53. a temperature sensor B; 54. heating cavity

6. An exhaust gas concentration device;

7. an exhaust gas passage;

8. a filtration device;

9. a medium line;

10. and (4) a chimney.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be noted that "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

The first embodiment is as follows:

as shown in fig. 1 and 2:

a heat exchange catalytic combustion furnace for treating VOCs in industrial production comprises a heat exchanger A21, a heat exchanger B22, a heat exchanger C23, a catalytic reaction device 3 and an exhaust system 4; wherein, the first and the second end of the pipe are connected with each other,

a cold fluid inlet of the heat exchanger A21 is communicated with a waste gas discharge port of the production unit 1, a cold fluid outlet of the heat exchanger A21 is communicated with a cold fluid inlet of the heat exchanger C23, a cold fluid outlet of the heat exchanger C23 is communicated with a gas inlet of the catalytic reaction device 3, a gas outlet of the catalytic reaction device 3 is communicated with a hot fluid inlet of the heat exchanger C23, a hot fluid outlet of the heat exchanger C23 is communicated with a hot fluid inlet of the heat exchanger B22, a hot fluid outlet of the heat exchanger B22 is communicated with a hot fluid inlet of the heat exchanger A21, and a hot fluid outlet of the heat exchanger A21 is communicated with a gas inlet end of the exhaust system 4;

the medium line 9 is connected to the production assembly 1 via a heat exchanger B22.

The heat exchange catalytic combustion furnace is mainly used for treating high-concentration organic waste gas and can be used in printing, coating and other industries.

In the using process, a worker starts the exhaust system 4, and the organic waste gas generated in the working process of the production unit 1 is sucked into the catalytic reaction device 3 for reaction by the suction force generated by the exhaust system 4;

the organic waste gas reacts in the catalytic reaction device 3 to produce carbon dioxide and water, and simultaneously releases a large amount of heat energy, the heat energy can change the gas into high-temperature gas, and the high-temperature gas passes through the heat exchanger C23, the heat exchanger B22 and the heat exchanger A21 in sequence;

when the high-temperature gas passes through the heat exchanger C23, the heat exchanger B22 and the heat exchanger A21, the high-temperature gas can heat the medium and the organic waste gas used by the production unit 1 through the heat exchanger C23, the heat exchanger B22 and the heat exchanger A21, so that the heat energy generated in the reaction of the organic waste gas is reasonably arranged and used, and the loss of energy is effectively reduced.

It should be noted that the exhaust system 4 is a centrifugal fan, and the heat exchanger a21 is communicated with the chimney 10 through the centrifugal fan, so that the purified gas can be discharged to the atmosphere through the chimney 10.

Preferably, the catalytic reactor 3 is divided into an upper zone and a lower zone; wherein the content of the first and second substances,

the upper region of the catalytic reaction device 3 is filled with a heat storage body, and the lower region is filled with a catalyst;

when organic waste gas gets into catalytic reaction unit 3 in the time, organic waste gas can be earlier through the heat accumulator, and organic waste gas can disperse when the heat accumulator, makes organic waste gas can get into catalytic reaction unit 3's lower region more evenly in the abundant contact with the catalyst for organic waste gas's reaction is more abundant, with the purification efficiency who improves organic waste gas.

It should be noted that the heat storage body is made of a ceramic material, and the cross-sectional shape of the heat storage body is a honeycomb structure, which can disperse the organic exhaust gas entering the catalytic reaction device 3, so that the organic exhaust gas is more fully contacted with the catalyst, thereby effectively improving the purification efficiency of the organic exhaust gas.

Preferably, the heat exchange catalytic combustion furnace further comprises a heating device 5; a cold fluid outlet of the heat exchanger C23 is communicated with an air inlet of the catalytic reaction device 3 through a heating device 5;

when organic waste gas enters the heating device 5, the heating device 5 heats the organic waste gas, so that the temperature of the organic waste gas is raised to the reaction temperature, and the treatment effect of the organic waste gas is effectively improved.

Preferably, the heating device 5 comprises a housing 51 and a burner 52; wherein, the first and the second end of the pipe are connected with each other,

a waste gas inlet and a waste gas outlet are formed in the shell 51, a cold fluid outlet of the heat exchanger C23 is communicated with the waste gas inlet, the waste gas outlet is communicated with a gas inlet of the catalytic reaction device 3, the combustor 52 is arranged in the shell 51, and an inlet end of the combustor 52 is communicated with an external natural gas pipeline;

when the organic waste gas enters the inside of the housing 51, the burner 52 starts to operate, and the heating device 5 heats the organic waste gas by open flame, so that the temperature of the organic waste gas is rapidly raised to the reaction temperature.

Preferably, the exhaust gas inlet and the exhaust gas outlet are both provided with a temperature sensor B53;

when the temperature sensor B53 at the exhaust gas inlet detects that the temperature of the organic exhaust gas entering the housing 51 reaches or exceeds the reaction temperature, the burner 52 does not operate to reduce the energy consumption;

when the temperature of the organic waste gas entering the housing 51 does not reach the reaction temperature, the burner 52 starts to operate to heat the organic waste gas, so that the temperature of the organic waste gas rises; and when the temperature sensor B53 at the waste gas outlet detects that the temperature of the heated organic waste gas reaches the reaction temperature, the burner 52 automatically adjusts the angle of the natural gas delivery valve according to the temperature of the organic waste gas to control the fire power, so that the temperature of the heated organic waste gas is kept in a proper reaction interval, and the condition of overheating is avoided.

Preferably, an air supplement valve 31 is arranged on the catalytic reaction device 3, a temperature sensor A32 is arranged at an air outlet of the catalytic reaction device 3, and the air supplement valve 31 and the temperature sensor A32 are electrically connected with a control part of the catalytic reaction device 3;

when the concentration of the organic waste gas is too high, the temperature rise of the organic waste gas in the reaction process is large, and the temperature sensor a32 detects that the temperature of the high-temperature gas exceeds 500 ℃, the control part in the catalytic reaction device 3 controls the air supplement valve 31 to be opened, and fresh air is supplemented into the catalytic reaction device 3, so that the organic waste gas is diluted.

Preferably, the heat exchange catalytic combustion furnace further comprises an exhaust gas concentration device 6; wherein, the first and the second end of the pipe are connected with each other,

a three-way pipe is arranged at a hot fluid outlet of the heat exchanger C23, the hot fluid outlet of the heat exchanger C23 is respectively communicated with a hot fluid inlet of the heat exchanger B22 and the waste gas concentration device 6 through the three-way pipe, and hot air entering the waste gas concentration device 6 is used for desorbing organic waste gas in the waste gas concentration device 6, so that heat energy generated in the organic waste gas reaction process is more fully utilized.

Preferably, the waste gas concentration device 6 is a zeolite rotating wheel or activated carbon adsorption and desorption device.

Preferably, the heat exchange catalytic combustion furnace further comprises a waste gas channel 7; wherein the content of the first and second substances,

the cold fluid outlet of the heat exchanger A21 and the concentrated waste gas outlet end of the waste gas concentrating device 6 are communicated with the cold fluid inlet of the heat exchanger C23 through a waste gas channel 7.

Optimally, the heat exchange catalytic combustion furnace also comprises a filtering device 8, and a waste gas discharge port of the production unit 1 is communicated with a cold fluid inlet of the heat exchanger A21 through the filtering device 8, so that impurities such as dust, solid particles, sticky substances and the like in the organic waste gas can be intercepted, and the organic waste gas can be better purified.

Preferably, the filter device 8 is a dry filter, and a coarse filter, an intermediate filter, and a high-efficiency filter are provided inside the dry filter.

Example two:

as shown in fig. 3 and 4:

as another embodiment of the present invention, the heating device 5 includes a heat exchanger D24, a heating cavity 54 and a burner 52; wherein the content of the first and second substances,

the cold fluid outlet of the heat exchanger C23 is communicated with the cold fluid inlet of the heat exchanger D24, the cold fluid outlet of the heat exchanger D24 is communicated with the air inlet of the catalytic reaction device 3, the burner 52 is arranged in the heating cavity 54, the air inlet end of the burner 52 is communicated with an external natural gas pipeline, and the hot fluid inlet of the heat exchanger D24 and the hot fluid outlet of the heat exchanger D24 are both communicated with the heating cavity 54.

Since natural gas contains a small amount of sulfur, sulfur compounds formed in the catalyst may block the catalyst in the lower region of the catalytic reaction device 3, resulting in a decrease in the activity of the catalyst;

the burner 52 heats the gas in the heating cavity 54, so that the heated gas enters the heat exchanger D24 to exchange heat with the organic waste gas, the organic waste gas is not in direct contact with the burner 52 while the temperature is raised, the mixing of the components in the natural gas and the organic waste gas is avoided, and the occurrence of the condition that the components in the natural gas affect the activity of the catalyst is effectively avoided.

In addition, other structures of the heat exchange catalytic combustion furnace described in this embodiment are completely the same as those of the heat exchange catalytic combustion furnace described in the first embodiment, and specific reference may be made to the contents of the first embodiment, and a detailed description thereof will not be repeated.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A heat transfer catalytic combustion furnace for industrial production VOCs administers which characterized in that: comprises a heat exchanger A (21), a heat exchanger B (22), a heat exchanger C (23), a catalytic reaction device (3) and an exhaust system (4);

a cold fluid inlet of the heat exchanger A (21) is communicated with an exhaust gas discharge port of a production unit (1), a cold fluid outlet of the heat exchanger A (21) is communicated with a cold fluid inlet of the heat exchanger C (23), a cold fluid outlet of the heat exchanger C (23) is communicated with an air inlet of the catalytic reaction device (3), an air outlet of the catalytic reaction device (3) is communicated with a hot fluid inlet of the heat exchanger C (23), a hot fluid outlet of the heat exchanger C (23) is communicated with a hot fluid inlet of the heat exchanger B (22), a hot fluid outlet of the heat exchanger B (22) is communicated with a hot fluid inlet of the heat exchanger A (21), and a hot fluid outlet of the heat exchanger A (21) is communicated with an air inlet end of the exhaust system (4);

the medium pipeline (9) is communicated to the production unit (1) through the heat exchanger B (22).

2. A heat exchange catalytic combustion furnace as in claim 1 wherein: the device also comprises a heating device (5) for heating the organic waste gas, and a cold fluid outlet of the heat exchanger C (23) is communicated with an air inlet of the catalytic reaction device (3) through the heating device (5).

3. A heat exchange catalytic combustion furnace as in claim 2 wherein: the heating device (5) comprises a heat exchanger D (24), a heating cavity (54) and a burner (52); the cold fluid outlet of the heat exchanger C (23) is communicated with the cold fluid inlet of the heat exchanger D (24), the cold fluid outlet of the heat exchanger D (24) is communicated with the air inlet of the catalytic reaction device (3), the combustor (52) is arranged in the heating cavity, the air inlet end of the combustor (52) is communicated with an external natural gas pipeline, and the hot fluid inlet of the heat exchanger D (24) and the hot fluid outlet of the heat exchanger D (24) are communicated with the heating cavity (54).

4. A heat exchange catalytic combustion furnace as set forth in claim 2 wherein: the heating device (5) comprises a housing (51) and a burner (52); be provided with waste gas import and waste gas outlet on casing (51), the cold fluid export of heat exchanger C (23) with waste gas import intercommunication, waste gas outlet with the air inlet intercommunication of catalytic reaction device (3), combustor (52) set up in casing (51), just the inlet end and the outside natural gas pipeline intercommunication of combustor (52).

5. A heat exchange catalytic combustion furnace as set forth in claim 4 wherein: the air supply device is characterized in that an air supply valve (31) is arranged on the catalytic reaction device (3), a temperature sensor A (32) is arranged at an air outlet of the catalytic reaction device (3), and the air supply valve (31) and the temperature sensor A (32) are electrically connected with a control part of the catalytic reaction device (3).

6. A heat exchange catalytic combustion furnace as set forth in claim 5 wherein: the waste gas desorption device is characterized by further comprising a waste gas concentration device (6), a three-way pipe is arranged at a hot fluid outlet of the heat exchanger C (23), the hot fluid outlet of the heat exchanger C (23) is respectively communicated with a hot fluid inlet of the heat exchanger B (22) and the waste gas concentration device (6) through the three-way pipe, and hot air entering the waste gas concentration device (6) is used for desorbing organic waste gas in the waste gas concentration device (6).

7. A heat exchange catalytic combustion furnace as set forth in claim 6 wherein: the waste gas concentration device (6) is a zeolite rotating wheel or activated carbon adsorption and desorption device.

8. A heat exchange catalytic combustion furnace as set forth in claim 7 wherein: the heat exchanger further comprises an exhaust gas channel (7), and a cold fluid outlet of the heat exchanger A (21) and a concentrated exhaust gas outlet end of the exhaust gas concentrating device (6) are communicated with a cold fluid inlet of the heat exchanger C (23) through the exhaust gas channel (7).

9. A heat exchange catalytic combustion furnace according to any of claims 1 to 8, wherein: the system also comprises a filtering device (8), and an exhaust gas discharge port of the production unit (1) is communicated with a cold fluid inlet of the heat exchanger A (21) through the filtering device (8).

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