Method and apparatus for treating organic particulate matter exhaust gas

Abstract

The application discloses a treatment method and a treatment device for organic particulate matter waste gas, wherein the treatment method comprises the following steps: directly conveying the organic particulate matter waste gas to a combustion chamber of a regenerative combustion furnace through a conveying pipe, mixing the organic particulate matter waste gas with organic waste gas which is heated by a heat accumulator of the regenerative combustion furnace and then enters the combustion chamber, and combusting the organic particulate matter waste gas and the organic waste gas together in the combustion chamber. The application changes the way of the organic particulate matter waste gas entering the regenerative combustion furnace, and changes the original way of entering the combustion chamber from the heat accumulator together with the ordinary organic waste gas to directly entering the combustion chamber of the regenerative combustion furnace for combustion through the conveying pipe. The treatment method can solve the problem that the organic particulate matter waste gas softens and blocks the honeycomb heat accumulator holes when passing through the heat accumulator in the original method.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment, specifically to methods and equipment for treating organic particulate waste gas. Background Technology

[0002] The existing method for treating waste gas in regenerative combustion furnaces involves the gas entering the lower chamber through a riser valve, then being preheated by regenerative bricks (regenerative materials) within the lower chamber. Once a certain temperature is reached, the gas enters the upper chamber for combustion. This "heat storage" is used to preheat the subsequently entering organic waste gas, thus saving fuel consumption for heating the waste gas. The lower chamber with regenerative bricks should be divided into two or more sections. Each lower chamber with regenerative bricks sequentially undergoes a heat storage-heat release-cleaning process, repeating continuously. After the regenerative bricks "release heat," an appropriate amount of clean air should be immediately introduced to clean the regenerative bricks in the lower chamber (to ensure a VOC removal rate of over 98%). Only after cleaning can the "heat storage" process begin; otherwise, residual VOCs will be emitted into the chimney with the flue gas, reducing treatment efficiency. The regenerative bricks are typically honeycomb ceramic regenerative materials. Their heat exchange area is directly related to the pore size and wall thickness of the honeycomb ceramic. The smaller the pore size and the thinner the wall thickness, the larger the surface area, resulting in a larger heat exchange area and higher heat exchange efficiency.

[0003] When the exhaust gas contains organic particulate matter, the organic particulate matter melts in the honeycomb ceramic pores of the heat storage brick because the temperature inside the heat storage brick has not reached the combustion temperature. This melts and blocks the honeycomb ceramic pores of the heat storage body, causing the required pressure drop through the heat storage brick to increase. Eventually, after complete blockage, the exhaust gas cannot pass through the heat storage brick to enter the upper chamber, and the regenerative combustion furnace loses its ability to treat exhaust gas. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a method and equipment for treating organic particulate waste gas.

[0005] The technical solution adopted in this invention is as follows:

[0006] A method for treating particulate matter waste gas involves directly conveying the particulate matter waste gas through a conveying pipe to the combustion chamber of a regenerative combustion furnace, mixing it with the organic waste gas that has been heated in the regenerative combustion furnace before entering the combustion chamber, and then burning the particulate matter waste gas and the organic waste gas together in the combustion chamber.

[0007] This application changes the way particulate matter waste gas enters the regenerative thermal oxidizer. Instead of entering the combustion chamber from the regenerator along with ordinary organic waste gas, it now enters the combustion chamber directly through a feed pipe. This treatment method solves the problem in the original method where particulate matter waste gas softens and clogs the honeycomb regenerator pores as it passes through the regenerator.

[0008] Since the heat storage body in this application does not need to pass through organic particulate waste gas, the pore size of the honeycomb ceramic pores in the heat storage body can be made relatively small, reducing the volume of the heat storage chamber and the number of heat storage bricks, thus lowering the manufacturing cost. Since the organic waste gas passing through the heat storage chamber does not contain components that coke or soften at high temperatures, the maintenance time of the heat storage chamber combustion furnace can be reduced, and the number of times the heat storage bricks need to be replaced can be decreased, thus reducing the operating cost.

[0009] This application also discloses a treatment device for organic particulate matter waste gas, including a regenerative thermal ignition furnace and a conveying pipe;

[0010] The regenerative combustion furnace includes:

[0011] The combustion furnace body has a combustion chamber and at least two independent regenerator chambers. The combustion chamber is located above the regenerator chambers and has interconnecting channels. The combustion chambers are connected to each regenerator chamber through corresponding interconnecting channels. The outlet of the feed pipe is connected to the combustion chamber and is used to transport organic particulate waste gas to the combustion chamber. The regenerator chamber is provided with an organic waste gas inlet, a waste outlet, and a purging inlet.

[0012] The heat storage body is installed in the corresponding heat storage chamber, and the organic waste gas inlet, waste outlet and purge air inlet are all located at the end of the heat storage body facing away from the combustion chamber.

[0013] The burner is disposed in the combustion chamber;

[0014] The organic waste gas conveying pipe is connected to the organic waste gas inlet of each heat storage chamber through pipelines;

[0015] The purge pipe is connected to the purge air inlet of each heat storage chamber via pipelines;

[0016] Waste discharge pipes are connected to the waste discharge outlets of each heat storage chamber via pipelines.

[0017] In one embodiment of the present invention, a plurality of control valves are also included, which control the opening and closing of the organic waste gas inlet, the opening and closing of the waste discharge port, and the opening and closing of the purge air inlet.

[0018] The control valve described in this application can be installed on the corresponding pipeline, and the opening and closing of the organic waste gas inlet, exhaust outlet and purging inlet can be individually controlled by controlling the opening and closing of the corresponding pipeline.

[0019] In one embodiment of the present invention, there are multiple conveying pipes arranged at intervals in the combustion chamber; the organic particulate matter waste gas treatment equipment also includes a main conveying pipe, and each conveying pipe is connected to the main conveying pipe;

[0020] A conveying fan is installed on the main conveying pipe, which is used to convey organic particulate waste gas to the combustion chamber.

[0021] In one embodiment of the present invention, the number of conveying pipes is the same as the number of heat storage chambers, and the conveying pipes and heat storage chambers are matched one-to-one. The outlet of the conveying pipe is located directly above or diagonally above the corresponding heat storage chamber.

[0022] By introducing organic particulate waste gas through multiple feed pipes, the residence time of the organic particulate waste gas in the combustion chamber can be guaranteed, thus ensuring the treatment effect.

[0023] In one embodiment of the present invention, there are three heat storage chambers, namely a first heat storage chamber, a second heat storage chamber, and a third heat storage chamber.

[0024] In one embodiment of the present invention, the burner is equipped with a gas pipe and a gas-supporting pipe.

[0025] In one embodiment of the present invention, the heat storage body is a honeycomb ceramic heat storage body.

[0026] In one embodiment of the present invention, it further includes a main fan, an induced draft fan, and a purging fan;

[0027] The main fan is installed on the organic waste gas conveying pipe and is used to convey organic waste gas to the combustion furnace body;

[0028] The purging fan is installed on the purging pipe and is used to purge residual organic matter in the heat storage body in the heat storage chamber;

[0029] The induced draft fan is installed on the waste discharge pipe and is used to extract the treated waste gas from the combustion furnace body.

[0030] The beneficial effects of this invention are as follows: This application changes the way organic particulate waste gas enters the regenerative combustion furnace. Instead of entering the combustion chamber from the regenerator along with ordinary organic waste gas, it now enters the combustion chamber directly through a conveying pipe. This treatment method solves the problem in the original method where organic particulate waste gas softens and clogs the honeycomb regenerator pores as it passes through the regenerator. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the principle of an organic particulate matter waste gas treatment device.

[0032] The labels for the attached figures are as follows:

[0033] 1. Regenerative combustion furnace; 10. Combustion furnace body; 101. Combustion chamber; 102. Interconnection passage; 103a. First regenerative chamber; 103b. Second regenerative chamber; 103c. Third regenerative chamber; 104. Organic waste gas inlet; 105. Waste outlet; 106. Purge air inlet; 11. Regenerator; 12. Burner; 121. Gas pipe; 122. Combustion-supporting pipe; 13. Organic waste gas conveying pipe; 14. Purge pipe; 15. Waste outlet; 16. Main fan; 17. Exhaust fan; 18. Purge fan; 20a. First conveying pipe; 20b. Second conveying pipe; 20c. Third conveying pipe; 21. Main conveying pipe; 22. Conveying fan. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] The present invention will now be described in detail with reference to the accompanying drawings.

[0038] like Figure 1 As shown, a method for treating organic particulate waste gas involves directly conveying the organic particulate waste gas through conveying pipes (20a, 20b, 20c) to the combustion chamber 101 of a regenerative combustion furnace 1, where it is mixed with the organic waste gas that has been heated in the regenerative chamber of the regenerative combustion furnace 1 before entering the combustion chamber 101. The organic particulate waste gas and the organic waste gas are then burned together in the combustion chamber 101.

[0039] This application changes the way particulate matter waste gas enters the regenerative thermal oxidizer 1. Instead of entering the combustion chamber 101 from the regenerator along with ordinary organic waste gas, it directly enters the combustion chamber 101 of the regenerative thermal oxidizer 1 through a conveying pipe. This treatment method can solve the problem in the original method where particulate matter waste gas softens and clogs the honeycomb regenerator pores when passing through the regenerator.

[0040] Since the heat storage body 11 of the heat storage chamber does not need to pass through organic particulate waste gas, the pore size of the honeycomb ceramic pores in the heat storage body 11 can be made relatively small, reducing the volume of the heat storage chamber and the number of heat storage bricks, thus reducing manufacturing costs. Since the organic waste gas passing through the heat storage chamber does not contain components that coke or soften at high temperatures, the maintenance time of the heat storage chamber combustion furnace can be reduced, and the number of times the heat storage bricks need to be replaced can be reduced, thus reducing operating costs.

[0041] like Figure 1 As shown, this embodiment also discloses an organic particulate matter waste gas treatment device, including a regenerative combustion furnace 1 and a material conveying pipe (20a, 20b, 20c);

[0042] The regenerative combustion furnace 1 includes:

[0043] The combustion furnace body 10 has a combustion chamber 101 and three independent heat storage chambers, namely a first heat storage chamber 103a, a second heat storage chamber 103b and a third heat storage chamber 103c. The combustion chamber 101 is distributed above the heat storage chambers. An interconnection channel 102 is provided on the combustion chamber 101, and the combustion chamber 101 is connected to each heat storage chamber through the corresponding interconnection channel 102. The outlet of the conveying pipe is connected to the combustion chamber 101, and the conveying pipe is used to convey organic particulate waste gas to the combustion chamber 101. Each of the three heat storage chambers (first heat storage chamber 103a, second heat storage chamber 103b and third heat storage chamber 103c) is provided with an organic waste gas inlet 104, a waste outlet 105 and a purging air inlet 106.

[0044] The heat storage body 11 is installed in the corresponding heat storage chamber. The organic waste gas inlet 104, the waste outlet 105 and the purge air inlet 106 are all located at the end of the heat storage body 11 that is away from the combustion chamber 101.

[0045] Burner 12 is disposed in combustion chamber 101;

[0046] The organic waste gas conveying pipe 13 is connected to the organic waste gas inlet 104 of each heat storage chamber through a pipeline;

[0047] The purge pipe 14 is connected to the purge air inlet 106 of each heat storage chamber via a pipeline;

[0048] Waste discharge pipe 15 is connected to the waste discharge port 105 of each heat storage chamber through a pipeline.

[0049] In practical applications, the heat storage chamber can be set to 2 or more than 3.

[0050] In this embodiment, multiple control valves (not shown in the figure) are also included. The corresponding control valves control the opening and closing of the organic waste gas inlet 104, the opening and closing of the waste discharge port 105, and the opening and closing of the purge inlet 106.

[0051] The control valve mentioned in this application can be installed on the corresponding pipeline, and the opening and closing of the organic waste gas inlet 104, the waste outlet 105 and the purging inlet 106 can be individually controlled by controlling the opening and closing of the corresponding pipeline.

[0052] In this embodiment, there are multiple conveying pipes, which are spaced apart in the combustion chamber 101; the organic particulate matter waste gas treatment equipment also includes a main conveying pipe 21, and each conveying pipe is connected to the main conveying pipe 21.

[0053] A conveying fan 22 is installed on the conveying main pipe 21. The conveying fan 22 is used to transport the organic particulate waste gas to the combustion chamber 101.

[0054] In this embodiment, the number of conveying pipes is the same as the number of heat storage chambers. There are three conveying pipes: a first conveying pipe 20a, a second conveying pipe 20b, and a third conveying pipe 20c. Each conveying pipe corresponds to one heat storage chamber, and the outlet of each conveying pipe is located directly above or diagonally above the corresponding heat storage chamber. Each conveying pipe can be individually controlled to open or close. Using multiple conveying pipes to introduce particulate matter waste gas ensures that the residence time of the particulate matter waste gas in the combustion chamber 101 is guaranteed, thus ensuring the treatment effect.

[0055] like Figure 1 As shown, in this embodiment, the burner 12 is equipped with a gas pipe 121 and a gas-supporting pipe 122.

[0056] In this embodiment, the heat storage body 11 is a honeycomb ceramic heat storage body 11.

[0057] like Figure 1 As shown, in this embodiment, it also includes a main fan 16, an induced draft fan 17, and a purge fan 18;

[0058] The main fan 16 is installed on the organic waste gas conveying pipe 13 and is used to convey organic waste gas to the combustion furnace body 10.

[0059] The purge fan 18 is installed on the purge pipe 14 and is used to purge residual organic matter in the heat storage body 11 in the heat storage chamber.

[0060] The induced draft fan 17 is installed on the waste discharge pipe 15 and is used to extract the treated waste gas from the combustion furnace body 10.

[0061] One operating mode of the organic particulate matter waste gas treatment equipment in this embodiment:

[0062] First cycle: In the first heat storage chamber 103a, organic waste gas (without organic particulate matter) passes through the high-temperature heat storage body 11. The heat storage body 11 releases heat, its temperature decreases, and the organic waste gas absorbs heat, its temperature increases. After heat exchange in the first heat storage chamber 103a, the organic waste gas enters the combustion chamber 101 at a higher temperature. Simultaneously, organic particulate waste gas directly enters the combustion chamber 101 through the first feed pipe 20a. The organic particulate waste gas and organic waste gas entering the combustion chamber 101 are mixed and decomposed into CO2 and H2O gases due to the high temperature. If the temperature does not reach the oxidation temperature, the burner 12 in the combustion chamber 101 heats the temperature in the combustion chamber 101 to the oxidation temperature. After oxidation and decomposition, high-temperature waste gas is obtained. The high-temperature waste gas enters the third heat storage chamber 103c and releases a large amount of heat to the heat storage body 11 in the third heat storage chamber 103c. The heat storage body 11 in the third heat storage chamber 103c absorbs a large amount of heat and rises in temperature. The cooled waste gas is discharged through the exhaust pipe 15 by the action of the induced draft fan 17. The exhaust pipe 15 is usually connected to the chimney and is finally discharged into the atmosphere through the chimney to complete the waste gas treatment.

[0063] The second heat storage chamber 103b is in a cleaning state. The exhaust gas remaining in the heat storage body 11 and the second heat storage chamber 103b from the previous round of treatment is blown back into the combustion chamber 101 for high-temperature decomposition. After passing through the third heat storage chamber 103c, it is discharged by the action of the induced draft fan 17.

[0064] After the first cycle is completed, the second cycle begins: organic waste gas enters through the third heat storage chamber 103c, organic particulate waste gas is introduced into the combustion chamber 101 through the third feed pipe 20c, and the resulting waste gas is discharged from the second heat storage chamber 103b. The first heat storage chamber 103a performs the purging function.

[0065] After the second cycle is completed, the third cycle begins: organic waste gas enters through the second heat storage chamber 103b, organic particulate waste gas is introduced into the combustion chamber 101 through the second feed pipe 20b, the resulting waste gas is discharged from the first heat storage chamber 103a, and the third heat storage chamber 103c performs the purging function.

[0066] Three loops form a group, and the next group of loops is repeated.

[0067] The above description is merely a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present invention.

Claims

1. A device for treating organic particulate matter waste gas, characterized in that, This includes a regenerative combustion furnace and material conveying pipes; The regenerative combustion furnace includes: The combustion furnace body has a combustion chamber and at least two independent regenerator chambers. The combustion chamber is located above the regenerator chambers and has interconnecting channels. The combustion chambers are connected to each regenerator chamber through corresponding interconnecting channels. The outlet of the feed pipe is connected to the combustion chamber and is used to transport organic particulate waste gas to the combustion chamber. The regenerator chamber is provided with an organic waste gas inlet, a waste outlet, and a purging inlet. The heat storage body is installed in the corresponding heat storage chamber, and the organic waste gas inlet, waste outlet and purge air inlet are all located at the end of the heat storage body facing away from the combustion chamber. The burner is disposed in the combustion chamber; The organic waste gas conveying pipe is connected to the organic waste gas inlet of each heat storage chamber through pipelines; The purge pipe is connected to the purge air inlet of each heat storage chamber via pipelines; Waste discharge pipes are connected to the waste discharge outlets of each heat storage chamber via pipelines; The feed pipes are multiple and spaced apart in the combustion chamber; the organic particulate matter waste gas treatment equipment also includes a feed main pipe, and each feed pipe is connected to the feed main pipe; A conveying fan is installed on the main conveying pipe, and the conveying fan is used to transport the organic particulate waste gas to the combustion chamber; The number of conveying pipes is the same as the number of regenerators, and the conveying pipes and regenerators are matched one-to-one. The outlet of the conveying pipe is located directly above or diagonally above the corresponding regenerator. The conveying pipe is used to transport organic particulate waste gas to the combustion chamber of the regenerator, where it is mixed with the organic waste gas that has been heated in the regenerator and enters the combustion chamber. The organic particulate waste gas and the organic waste gas are burned together in the combustion chamber. It also includes multiple control valves, which control the opening and closing of the organic waste gas inlet, the opening and closing of the waste discharge port, and the opening and closing of the purge inlet. Each feed pipe can be individually controlled to open or close.

2. The organic particulate matter waste gas treatment equipment as described in claim 1, characterized in that, There are three heat storage chambers, namely the first heat storage chamber, the second heat storage chamber and the third heat storage chamber.

3. The organic particulate matter waste gas treatment equipment as described in claim 1, characterized in that, The burner is equipped with a gas pipe and an auxiliary gas pipe.

4. The organic particulate matter waste gas treatment equipment as described in claim 1, characterized in that, The heat storage body is a honeycomb ceramic heat storage body.

5. The organic particulate matter waste gas treatment equipment as described in claim 1, characterized in that, It also includes the main fan, the induced draft fan, and the purge fan; The main fan is installed on the organic waste gas conveying pipe and is used to convey organic waste gas to the combustion furnace body; The purging fan is installed on the purging pipe and is used to purge residual organic matter in the heat storage body in the heat storage chamber; The induced draft fan is installed on the waste discharge pipe and is used to extract the treated waste gas from the combustion furnace body.

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