Low-concentration odor treatment system

Abstract

The utility model belongs to the technical field of low-concentration odor treatment, and particularly relates to a low-concentration odor treatment system which comprises a booster fan, a steam heater, an alkali furnace, a first gas supply pipeline, a second gas supply pipeline, a third gas supply pipeline and a fourth gas supply pipeline, the first gas feeding pipeline is communicated with an air inlet of the booster fan and is used for feeding low-concentration odor into the booster fan; the second air supply pipeline is communicated with an air inlet of the steam heater and is used for feeding air into the steam heater; the third air supply pipeline is connected between the air outlet of the steam heater and the air inlet of the booster fan, and is used for feeding air heated by the steam heater into the booster fan; the fourth gas supply pipeline is communicated with the air outlet of the booster fan and the alkali furnace. The low-concentration odor and the heated air are mixed, then the low-concentration odor is indirectly heated, then the mixed gas is fed into the booster fan, and the low-concentration odor is prevented from being directly fed into the steam heater to be heated.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-concentration odor treatment, and in particular relates to a low-concentration odor treatment system. Background Art

[0002] In the papermaking industry, the evaporation section, combustion section, and caustic section will all produce a large amount of low-concentration non-condensable odor (referred to as low-concentration odor). The main components of this odor are air and water vapor, and less than 0.1% of total reducing sulfide, referred to as TRS. The components of TRS include hydrogen sulfide, methyl mercaptan, dimethyl sulfide, and dimethyl disulfide.

[0003] The existing low-concentration odor treatment technology usually sends the odor from each process section into the alkali furnace for combustion to reduce the impact on the surrounding environment. Before being sent to the alkali furnace for combustion, the low-concentration odor is generally required to be pre-treated by the odor treatment unit (according to the pre-treatment requirements of the low-concentration odor, the pre-treatment of the low-concentration odor by the odor treatment unit includes but is not limited to: dust removal in a water washing tower, condensation and water removal in a condenser, and demisting in a demister, etc.), and then the pre-treated low-concentration odor is sent to the steam heater for heating and the booster fan for pressurization in turn, and finally sent to the alkali furnace for combustion.

[0004] However, since the composition of low-concentration odor is complex and has certain corrosiveness, the use of the above-mentioned low-concentration odor treatment technology requires that the pre-treated low-concentration odor be directly sent into the steam heater for heating, which is easy to produce impurities in the steam heater, increase the dirt thermal resistance in the steam heater, and then cause the steam heater to become blocked. It is also easy to corrode the steam heater, affecting the service life of the steam heater, and even causing low-concentration odor leakage, deteriorating the surrounding working environment. Utility Model Content

[0005] In order to solve the defects of the above-mentioned prior art, the utility model provides a low-concentration odor treatment system to solve the technical problems that the existing low-concentration odor treatment technology needs to directly send the pre-treated low-concentration odor into the steam heater for heating, which is easy to produce impurities in the steam heater, increase the dirt thermal resistance in the steam heater, and then cause the steam heater to become blocked, and it is also easy to corrode the steam heater, affecting the service life of the steam heater, and even causing low-concentration odor leakage, deteriorating the surrounding working environment.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A low-concentration odor treatment system comprises a booster fan, a steam heater, an alkali furnace, a first air supply pipeline, a second air supply pipeline, a third air supply pipeline and a fourth air supply pipeline; the first air supply pipeline is connected to the air inlet of the booster fan, and the first air supply pipeline is used to deliver low-concentration odor into the booster fan; the second air supply pipeline is connected to the air inlet of the steam heater, and the second air supply pipeline is used to deliver air into the steam heater; the third air supply pipeline is connected between the air outlet of the steam heater and the air inlet of the booster fan, and the third air supply pipeline is used to deliver air heated by the steam heater into the booster fan; the fourth air supply pipeline connects the air outlet of the booster fan and the alkali furnace.

[0008] The first air supply pipeline is used to send low-concentration odor into the booster fan, the second air supply pipeline is used to send air into the steam heater, and the third air supply pipeline is used to send the air heated by the steam heater into the booster fan, so as to mix the low-concentration odor and the heated air, and then indirectly heat the low-concentration odor, and then send the mixed gas into the booster fan, so as to avoid the low-concentration odor being directly sent into the steam heater for heating, and solve the technical problems that the existing low-concentration odor treatment technology needs to send the pre-treated low-concentration odor directly into the steam heater for heating, which is easy to produce impurities in the steam heater, increase the dirt thermal resistance of the steam heater, and then cause the steam heater to become blocked, and it is also easy to corrode the steam heater, affecting the service life of the steam heater, and even causing low-concentration odor leakage, deteriorating the surrounding working environment.

[0009] Furthermore, the low-concentration odor treatment system further includes an odor treatment unit and a fifth air supply pipeline, wherein the first air supply pipeline is connected between the air inlet of the booster fan and the air outlet of the low-concentration odor treatment unit;

[0010] One end of the fifth air supply pipeline is communicated with the air inlet of the odor treatment unit, and the fifth air supply pipeline is used to deliver low-concentration odor into the odor treatment unit.

[0011] Furthermore, the odor treatment unit includes a demister.

[0012] Furthermore, the low-concentration odor treatment system also includes a first sewage pipeline, one end of which is connected to the sewage outlet of the demister.

[0013] In another technical solution, the odor treatment unit includes a condenser.

[0014] In another technical solution, the odor treatment unit includes a water washing tower.

[0015] In another technical solution, the odor treatment unit includes a water scrubber, a condenser and a demister connected in series in sequence, the first air supply pipeline is connected between the air inlet of the booster fan and the air outlet of the demister, one end of the fifth air supply pipeline is connected to the air inlet of the water scrubber, and the fifth air supply pipeline is used to deliver low-concentration odor into the water scrubber.

[0016] Furthermore, the low-concentration odor treatment system also includes a second sewage pipeline, a first low-point drain valve installed on the first air supply pipeline, and a second low-point drain valve installed on the fourth air supply pipeline. The first air supply pipeline is connected to the second sewage pipeline through the first low-point drain valve, and the fourth air supply pipeline is connected to the second sewage pipeline through the second low-point drain valve.

[0017] By providing the first low-point drain valve, the second low-point drain valve and the second sewage pipeline, the condensed waste water condensed in the first air supply pipeline and the fourth air supply pipeline can be recovered.

[0018] Furthermore, the steam heater is provided with a first heat exchange channel and a second heat exchange channel, one end of the first heat exchange channel is connected to the second air supply pipeline, and the other end of the first heat exchange channel is connected to the third air supply pipeline; one end of the second heat exchange channel is connected to a steam pipe, and the other end of the second heat exchange channel is connected to a condensed water pipe, the steam pipe is used to send condensed water vapor into the second heat exchange channel to release heat, and the condensed water pipe is used to receive condensed water condensed by heat release in the second heat exchange channel;

[0019] The steam pipeline is provided with a first electric regulating valve, the third air supply pipeline is provided with a temperature sensor, and the temperature sensor is electrically connected to the first electric regulating valve.

[0020] The temperature sensor is used to send temperature information of the air in the third air supply pipeline to the first electric regulating valve; the first electric regulating valve adjusts the opening according to the received temperature information.

[0021] The temperature sensor is used to send temperature information of the air in the third air supply pipeline to the first electric regulating valve, and then the first electric regulating valve is made to adjust its opening according to the received temperature information, so that the first electric regulating valve can adjust its opening according to the temperature information of the air in the third air supply pipeline (that is, the wind temperature of the outlet hot air of the steam heater) to adjust the air intake amount of condensed water vapor sent into the second heat exchange channel, thereby realizing the control of the wind temperature of the outlet hot air of the steam heater.

[0022] Furthermore, the low-concentration odor treatment system also includes a muffler arranged on the second air supply pipeline.

[0023] By using the muffler arranged on the second air supply pipeline, the noise generated when the air is supplied to the steam heater through the second air supply pipeline can be effectively reduced.

[0024] Furthermore, the third air supply pipeline is provided with a flow meter and a second electric regulating valve, the first air supply pipeline is provided with a pressure transmitter, and the flow meter and the pressure transmitter are both electrically connected to the second electric regulating valve.

[0025] Among them, the flow meter is used to send the flow information of the air in the third air supply pipeline to the second electric regulating valve, and the pressure transmitter is used to send the pressure information of the low-concentration odor in the first air supply pipeline to the second electric regulating valve; the second electric regulating valve adjusts the opening according to the received flow information and pressure information.

[0026] The flow meter is used to send the flow information of the air in the third air supply pipeline to the second electric regulating valve, and the pressure transmitter is used to send the pressure information of the low-concentration odor in the first air supply pipeline to the second electric regulating valve; then the second electric regulating valve is made to adjust the opening according to the received flow information and pressure information, so that the second electric regulating valve can adjust the opening according to the flow information of the air in the third air supply pipeline (that is, the flow value of the air in the third air supply pipeline) and the pressure information of the low-concentration odor in the first air supply pipeline (that is, the pressure value of the low-concentration odor in the first air supply pipeline), thereby enabling the low-concentration odor treatment system provided by the present invention to adjust the intake amount of hot air sent into the booster fan according to the intake amount of low-concentration odor sent into the booster fan, thereby achieving control of the temperature of the mixed gas sent by the booster fan, so as to control the temperature of the mixed gas sent into the alkali furnace for combustion within an appropriate temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 It is a structural schematic diagram of an existing low-concentration odor treatment system;

[0029] Figure 2 is a schematic structural diagram of a low-concentration odor treatment system in an embodiment;

[0030] 1—boost fan, 2—steam heater, 3—first air supply pipeline, 4—second air supply pipeline, 5—third air supply pipeline, 6—fourth air supply pipeline, 7—fifth air supply pipeline, 8—demister, 9—first sewage pipeline, 10—condenser, 11—water washing tower, 12—second sewage pipeline, 13—first low point drain valve, 14—second low point drain valve, 15—steam pipeline, 16—condensate pipe, 17—first electric regulating valve, 18—temperature sensor, 19—muffler, 20—flow meter, 21—second electric regulating valve, 22—pressure transmitter. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] like Figure 1 As shown, the existing low-concentration odor treatment technology usually sends the odor from each process section into the alkali furnace for combustion to reduce the impact on the surrounding environment. Before being sent to the alkali furnace for combustion, the low-concentration odor is generally required to be pre-treated by the odor treatment unit (according to the pre-treatment requirements of the low-concentration odor, the pre-treatment of the low-concentration odor by the odor treatment unit includes but is not limited to: dust removal in a water washing tower, condensation and water removal in a condenser, and demisting in a demister, etc.), and then the pre-treated low-concentration odor is successively sent to the steam heater 2 for heating and the booster fan 1 for pressurization, and finally sent to the alkali furnace for combustion.

[0033] like Figure 2 As shown, the present embodiment provides a low-concentration odor treatment system, comprising a booster fan 1, a steam heater 2, an alkali furnace, a first air supply pipeline 3, a second air supply pipeline 4, a third air supply pipeline 5 and a fourth air supply pipeline 6; the first air supply pipeline 3 is connected to the air inlet of the booster fan 1, and the first air supply pipeline 3 is used to deliver low-concentration odor into the booster fan 1; the second air supply pipeline 4 is connected to the air inlet of the steam heater 2, and the second air supply pipeline 4 is used to deliver air into the steam heater 2; the third air supply pipeline 5 is connected between the air outlet of the steam heater 2 and the air inlet of the booster fan 1, and the third air supply pipeline 5 is used to deliver the air heated by the steam heater 2 into the booster fan 1; the fourth air supply pipeline 6 connects the air outlet of the booster fan 1 and the alkali furnace.

[0034] The low-concentration odor is sent into the booster fan 1 by the first air supply pipeline 3, the air is sent into the steam heater 2 by the second air supply pipeline 4, and the air heated by the steam heater 2 is sent into the booster fan 1 by the third air supply pipeline 5, so as to mix the low-concentration odor and the heated air, and then indirectly heat the low-concentration odor, and then the mixed gas is sent into the booster fan 1, so as to avoid the low-concentration odor being directly sent into the steam heater 2 for heating, and solves the technical problem that the existing low-concentration odor treatment technology needs to send the pre-treated low-concentration odor directly into the steam heater for heating, which is easy to produce impurities in the steam heater, increase the dirt thermal resistance of the steam heater, and then cause the steam heater to be blocked, and it is also easy to corrode the steam heater, affecting the service life of the steam heater, and even causing low-concentration odor leakage, deteriorating the surrounding working environment.

[0035] In one embodiment, if Figure 2 As shown, the low-concentration odor treatment system further includes an odor treatment unit and a fifth air supply pipeline 7, and the first air supply pipeline 3 is connected between the air inlet of the booster fan 1 and the air outlet of the low-concentration odor treatment unit;

[0036] One end of the fifth air supply pipeline 7 is connected to the air inlet of the odor treatment unit, and the fifth air supply pipeline 7 is used to deliver low-concentration odor into the odor treatment unit.

[0037] Among them, the setting method of the odor treatment unit is determined according to the pre-treatment requirements of the low-concentration odor, including but not limited to: if the low-concentration odor has a dust removal requirement, the odor treatment unit includes a water washing tower, and the water washing tower is used to remove dust from the low-concentration odor; if the low-concentration odor has a water removal requirement, the odor treatment unit includes a condenser, and the condenser is used to condense and remove water from the low-concentration odor; if the low-concentration odor has a demisting requirement, the odor treatment unit includes a demister, and the demister is used to demist the low-concentration odor.

[0038] Therefore, the configuration of the odor treatment unit includes but is not limited to the following configuration schemes.

[0039] Solution 1: The odor treatment unit includes a demister 8.

[0040] Solution 2: The odor treatment unit includes a condenser 10 .

[0041] Solution 3: The odor treatment unit includes a water washing tower 11.

[0042] Option 4: The odor treatment unit includes a water scrubber 11, a condenser 10 and a demister 8 which are connected in series in sequence. The first air supply pipeline 3 is connected between the air inlet of the booster fan 1 and the air outlet of the demister 8. One end of the fifth air supply pipeline 7 is connected to the air inlet of the water scrubber 11. The fifth air supply pipeline 7 is used to deliver low-concentration odor into the water scrubber 11.

[0043] Preferably, in this embodiment, the odor treatment unit is arranged in the fourth scheme described above.

[0044] In one embodiment, if Figure 2 As shown, the low-concentration odor treatment system also includes a first sewage pipe 9 , one end of which is connected to the sewage outlet of the demister 8 .

[0045] In one embodiment, if Figure 2 As shown, the low-concentration odor treatment system also includes a second sewage pipe 12, a first low-point drain valve 13 installed on the first air supply pipe 3, and a second low-point drain valve 14 installed on the fourth air supply pipe 6. The first air supply pipe 3 is connected to the second sewage pipe 12 through the first low-point drain valve 13, and the fourth air supply pipe 6 is connected to the second sewage pipe 12 through the second low-point drain valve 14.

[0046] By providing the first low-point drain valve 13 , the second low-point drain valve 14 and the second sewage pipeline 12 , the condensed waste water condensed in the first air supply pipeline 3 and the fourth air supply pipeline 6 can be recovered.

[0047] In this embodiment, if Figure 2 As shown, one end of the first sewage pipe 9 is connected to the sewage outlet of the demister 8 , and the other end of the first sewage pipe 9 is connected to the second sewage pipe 12 .

[0048] In one embodiment, if Figure 2 As shown, a first heat exchange channel and a second heat exchange channel are provided in the steam heater 2, one end of the first heat exchange channel is connected to the second air supply pipeline 4, and the other end of the first heat exchange channel is connected to the third air supply pipeline 5; one end of the second heat exchange channel is connected to a steam pipe 15, and the other end of the second heat exchange channel is connected to a condensed water pipe 16, the steam pipe 15 is used to send condensed water vapor (medium-pressure steam) into the second heat exchange channel for heat release, and the condensed water pipe 16 is used to receive condensed water condensed by heat release in the second heat exchange channel;

[0049] A first electric regulating valve 17 is provided on the steam pipeline 15 , and a temperature sensor (thermal resistor) 18 is provided on the third air supply pipeline 5 . The temperature sensor (thermal resistor) 18 is electrically connected to the first electric regulating valve 17 .

[0050] The temperature sensor (thermal resistor) 18 is used to send the temperature information of the air in the third air supply pipeline 5 to the first electric regulating valve 17; the first electric regulating valve 17 adjusts the opening according to the received temperature information.

[0051] The temperature sensor (thermal resistor) 18 is used to send the temperature information of the air in the third air supply pipeline 5 to the first electric regulating valve 17, and then the first electric regulating valve 17 adjusts its opening according to the received temperature information. In this way, the first electric regulating valve 17 can adjust its opening according to the temperature information of the air in the third air supply pipeline 5 (that is, the wind temperature of the outlet hot air of the steam heater 2) to adjust the air intake amount of condensed water vapor sent into the second heat exchange channel, thereby realizing the control of the wind temperature of the outlet hot air of the steam heater 2.

[0052] In one embodiment, if Figure 2 As shown, the low-concentration odor treatment system also includes a muffler 19 arranged on the second air supply pipeline 4.

[0053] By using the silencer 19 arranged on the second air supply pipeline 4, the noise generated when the air is supplied to the steam heater 2 through the second air supply pipeline can be effectively reduced.

[0054] In one embodiment, if Figure 2 As shown, a flow meter 20 and a second electric regulating valve 21 are provided on the third air supply pipeline 5 , and a pressure transmitter 22 is provided on the first air supply pipeline 3 . Both the flow meter 20 and the pressure transmitter 22 are electrically connected to the second electric regulating valve 21 .

[0055] Among them, the flow meter 20 is used to send the flow information of the air in the third air supply pipeline 5 to the second electric control valve 21, and the pressure transmitter 22 is used to send the pressure information of the low-concentration odor in the first air supply pipeline 3 to the second electric control valve 21; the second electric control valve 21 adjusts the opening according to the received flow information and pressure information.

[0056] The flow meter 20 is used to send the flow information of the air in the third air supply pipeline 5 to the second electric regulating valve 21, and the pressure transmitter 22 is used to send the pressure information of the low-concentration odor in the first air supply pipeline 3 to the second electric regulating valve 21; then the second electric regulating valve 21 is made to adjust the opening according to the received flow information and pressure information, so that the second electric regulating valve 21 can adjust the opening according to the flow information of the air in the third air supply pipeline 5 (that is, the flow value of the air in the third air supply pipeline 5) and the pressure information of the low-concentration odor in the first air supply pipeline 3 (that is, the pressure value of the low-concentration odor in the first air supply pipeline 3), thereby enabling the low-concentration odor treatment system provided by the present invention to adjust the intake amount of hot air supplied to the booster fan 1 according to the intake amount of the low-concentration odor supplied to the booster fan 1, thereby realizing the control of the temperature of the mixed gas supplied by the booster fan 1, so as to control the temperature of the mixed gas supplied to the alkali furnace for combustion within an appropriate temperature range.

[0057] The low-concentration odor treatment system provided by the utility model has at least the following technical effects or advantages:

[0058] 1. The low-concentration odor is sent into the booster fan 1 by using the first air supply pipeline 3, the air is sent into the steam heater 2 by using the second air supply pipeline 4, and the air heated by the steam heater 2 is sent into the booster fan 1 by using the third air supply pipeline 5, so as to mix the low-concentration odor and the heated air, and then indirectly heat the low-concentration odor, and then send the mixed gas into the booster fan 1, so as to avoid the low-concentration odor being directly sent into the steam heater 2 for heating, and solve the technical problem that the existing low-concentration odor treatment technology needs to send the pre-treated low-concentration odor directly into the steam heater for heating, which is easy to generate impurities in the steam heater, increase the dirt thermal resistance in the steam heater, and then cause the steam heater to be blocked, and it is also easy to corrode the steam heater, affecting the service life of the steam heater, and even causing low-concentration odor leakage, deteriorating the surrounding working environment.

[0059] 2. By providing the first low-point drain valve 13, the second low-point drain valve 14 and the second sewage pipeline 12, the condensed waste water condensed in the first air supply pipeline 3 and the fourth air supply pipeline 6 can be recovered.

[0060] 3. Use the temperature sensor (thermal resistor) 18 to send the temperature information of the air in the third air supply pipeline 5 to the first electric regulating valve 17, and then adjust the opening of the first electric regulating valve 17 according to the received temperature information, so that the first electric regulating valve 17 can adjust the opening according to the temperature information of the air in the third air supply pipeline 5 (that is, the wind temperature of the outlet hot air of the steam heater 2) to adjust the air intake of the condensed water vapor sent into the second heat exchange channel, thereby realizing the control of the wind temperature of the outlet hot air of the steam heater 2.

[0061] 4. The silencer 19 provided on the second air supply pipeline 4 can effectively reduce the noise generated when the air is supplied to the steam heater 2 through the second air supply pipeline.

[0062] 5. Use the flow meter 20 to send the flow information of the air in the third air supply pipeline 5 to the second electric regulating valve 21, and use the pressure transmitter 22 to send the pressure information of the low-concentration odor in the first air supply pipeline 3 to the second electric regulating valve 21; then make the second electric regulating valve 21 adjust the opening according to the received flow information and pressure information, so that the second electric regulating valve 21 can adjust the opening according to the flow information of the air in the third air supply pipeline 5 (that is, the flow value of the air in the third air supply pipeline 5) and the pressure information of the low-concentration odor in the first air supply pipeline 3 (that is, the pressure value of the low-concentration odor in the first air supply pipeline 3), so that the low-concentration odor treatment system provided by the present invention can adjust the intake amount of hot air sent into the booster fan 1 according to the intake amount of the low-concentration odor sent into the booster fan 1, so as to control the temperature of the mixed gas sent by the booster fan 1, so as to control the temperature of the mixed gas sent to the alkali furnace for combustion within an appropriate temperature range.

[0063] The above are only specific application examples of the present utility model and do not constitute any limitation to the protection scope of the present invention. Any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A low-concentration odor treatment system, characterized in that: It includes a booster fan, a steam heater, an alkali furnace, a first air supply pipeline, a second air supply pipeline, a third air supply pipeline and a fourth air supply pipeline; the first air supply pipeline is connected to the air inlet of the booster fan, and the first air supply pipeline is used to deliver low-concentration odor into the booster fan; the second air supply pipeline is connected to the air inlet of the steam heater, and the second air supply pipeline is used to deliver air into the steam heater; the third air supply pipeline is connected between the air outlet of the steam heater and the air inlet of the booster fan, and the third air supply pipeline is used to deliver air heated by the steam heater into the booster fan; the fourth air supply pipeline connects the air outlet of the booster fan and the alkali furnace.

2. The low-concentration odor treatment system according to claim 1, characterized in that: It also includes an odor treatment unit and a fifth air supply pipeline, wherein the first air supply pipeline is connected between the air inlet of the booster fan and the air outlet of the low-concentration odor treatment unit; One end of the fifth air supply pipeline is communicated with the air inlet of the odor treatment unit, and the fifth air supply pipeline is used to deliver low-concentration odor into the odor treatment unit.

3. The low-concentration odor treatment system according to claim 2, characterized in that: The odor treatment unit includes a demister.

4. The low-concentration odor treatment system according to claim 3, characterized in that: It also includes a first sewage pipeline, one end of which is connected to the sewage outlet of the demister.

5. The low-concentration odor treatment system according to claim 2, characterized in that: The odor treatment unit includes a condenser.

6. The low-concentration odor treatment system according to claim 2, characterized in that: The odor treatment unit includes a water washing tower.

7. The low-concentration odor treatment system according to claim 1, characterized in that: It also includes a second sewage pipeline, a first low-point drain valve installed on the first air supply pipeline, and a second low-point drain valve installed on the fourth air supply pipeline. The first air supply pipeline is connected to the second sewage pipeline through the first low-point drain valve, and the fourth air supply pipeline is connected to the second sewage pipeline through the second low-point drain valve.

8. The low-concentration odor treatment system according to claim 1, characterized in that: The steam heater is provided with a first heat exchange channel and a second heat exchange channel, one end of the first heat exchange channel is connected to the second air supply pipeline, and the other end of the first heat exchange channel is connected to the third air supply pipeline; one end of the second heat exchange channel is connected to a steam pipe, and the other end of the second heat exchange channel is connected to a condensed water pipe, the steam pipe is used to send condensed water vapor into the second heat exchange channel to release heat, and the condensed water pipe is used to receive condensed water condensed by heat release in the second heat exchange channel; The steam pipeline is provided with a first electric regulating valve, the third air supply pipeline is provided with a temperature sensor, and the temperature sensor is electrically connected to the first electric regulating valve.

9. The low-concentration odor treatment system according to claim 1, characterized in that: It also includes a muffler arranged on the second air supply pipeline.

10. The low-concentration odor treatment system according to claim 1, characterized in that: The third air supply pipeline is provided with a flow meter and a second electric regulating valve, the first air supply pipeline is provided with a pressure transmitter, and both the flow meter and the pressure transmitter are electrically connected to the second electric regulating valve.

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