A corrosion-resistant organic waste gas regenerative thermal combustion purification device

Abstract

This utility model relates to the field of organic waste gas treatment technology, and in particular to a corrosion-resistant organic waste gas regenerative thermal combustion purification device, comprising: a preheating mixer, a regenerative chamber group, a combustion chamber, an RTO fan, a hot air return pipeline, an RTO inlet main pipe, an RTO exhaust main pipe, a purge fan, and a purge air main pipe; wherein, the preheating mixer is provided with a waste gas inlet, a waste gas outlet, and a hot air return inlet; the high-temperature flue gas outlet of the combustion chamber is connected to the hot air return inlet through the hot air return pipeline; the waste gas outlet is connected to the inlet pipeline of the RTO fan, and the outlet of the RTO fan is connected to the first inlet end of the regenerative chamber group through the RTO inlet main pipe; the outlet end of the regenerative chamber group is connected to the inlet end of the RTO exhaust main pipe, and the combustion chamber is located at the top of the regenerative chamber group; this utility model introduces the high-temperature flue gas from the combustion chamber into the preheating mixer through the hot air return pipeline to preheat the corrosive organic waste gas, preventing corrosive components from condensing and corroding the regenerative body, RTO device, and pipelines.

Description

Technical Field

[0001] This utility model relates to the field of organic waste gas treatment technology, and in particular to a corrosion-resistant organic waste gas heat storage thermal combustion purification device. Background Technology

[0002] In industrial production processes such as chemical and pharmaceutical manufacturing, a large amount of organic waste gas containing corrosive components is generated. Direct emission of this waste gas would cause serious air pollution, so it must be purified to meet emission standards before being released. Regenerative thermal oxidizers (RTOs) have become one of the mainstream equipment for treating organic waste gas due to their advantages of high purification efficiency and good heat recovery and utilization.

[0003] However, existing RTO (Regenerative Thermal Oxidizer) units have significant shortcomings in treating corrosive organic waste gases. On one hand, cold, corrosive waste gases directly enter the regenerator and come into contact with the regenerator, causing condensation of corrosive components in the pipes, RTO unit, and regenerator, leading to corrosion, shortening equipment lifespan, and increasing maintenance costs. On the other hand, RTO units treating corrosive components lack a stable waste gas preheating and regulation mechanism, failing to ensure that corrosive components in the waste gas form condensation corrosion in the pipes, RTO unit, and other components. This results in shortened equipment lifespan and equipment failure due to condensation corrosion of the entire waste gas treatment system.

[0004] Based on the existing problems of condensation corrosion of corrosive components in the above-mentioned devices, this utility model provides a corrosion-resistant organic waste gas heat storage thermal combustion purification device, which aims to improve the adaptability of the equipment to organic waste gas containing corrosive components, while ensuring purification efficiency and operational stability. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by providing a corrosion-resistant organic waste gas heat storage thermal combustion purification device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A corrosion-resistant organic waste gas regenerative thermal combustion purification device includes: a preheating mixer, a regenerative chamber group, a combustion chamber, an RTO fan, a hot air return pipeline, an RTO inlet main pipe, an RTO exhaust main pipe, a purge fan, and a purge air main pipe;

[0008] The preheating mixer is equipped with an exhaust gas inlet, an exhaust gas outlet, and a hot air recirculation inlet.

[0009] The high-temperature flue gas outlet of the combustion chamber is connected to the hot air return inlet via a hot air return pipe;

[0010] The exhaust outlet is connected to the inlet pipe of the RTO fan, and the outlet of the RTO fan is connected to the first inlet end of the heat storage chamber group through the RTO air intake manifold.

[0011] The outlet end of the regenerator assembly is connected to the inlet end of the RTO exhaust manifold, and the combustion chamber is located at the top of the regenerator assembly, and the combustion chamber is connected to the regenerator assembly.

[0012] The purge fan is connected to the second inlet end of the heat storage chamber group through the purge air main pipe.

[0013] Furthermore, the heat storage chamber group includes: a first heat storage chamber, a second heat storage chamber, and a third heat storage chamber;

[0014] The three are arranged in parallel at the bottom of the combustion chamber, and the tops of the first regenerator, the second regenerator, and the third regenerator are all connected to the combustion chamber.

[0015] The interiors of the first, second, and third heat storage chambers are each provided with, from bottom to top, heat storage chamber inlet or outlet chambers and honeycomb ceramic heat storage layers.

[0016] Furthermore, a heat storage chamber inlet shut-off valve is fixedly installed at the first inlet end of the heat storage chamber inlet or exhaust chamber, and the inlet end of the heat storage chamber inlet shut-off valve is connected to the outlet end of the RTO inlet manifold.

[0017] Furthermore, an exhaust shut-off valve is fixedly installed at the outlet end of the heat storage chamber's inlet or outlet chamber, and the outlet end of the exhaust shut-off valve is connected to the inlet end of the RTO exhaust manifold.

[0018] Furthermore, a purge air shut-off valve is fixedly installed at the second inlet end of the heat storage chamber's inlet or outlet chamber, and the inlet end of the purge air shut-off valve is connected to the outlet end of the purge air main pipe.

[0019] Furthermore, a gas burner is installed at the top of the combustion chamber, and the gas inlet of the gas burner is connected to the gas pipeline.

[0020] Furthermore, a hot air return flow regulating valve is installed on the hot air return pipeline.

[0021] Furthermore, a temperature detector is fixedly installed at the exhaust outlet of the preheating mixer, and the temperature detector is interlocked with the hot air return flow regulating valve.

[0022] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0023] This invention introduces high-temperature flue gas from the combustion chamber into a preheating mixer via a hot air return pipeline to preheat the corrosive, cold organic waste gas. This prevents corrosive components in the waste gas from condensing in the pipes, RTO unit, and heat storage medium, thus avoiding corrosion of the equipment and pipes. Simultaneously, interlocking control between a temperature detector and a hot air return flow regulating valve ensures stable waste gas temperature after preheating. Three parallel heat storage chambers alternately perform the heating, heat storage, and purging processes. Combined with precise control of the shut-off valve, this achieves efficient heat recovery and removes residual waste gas from the heat storage medium through purging, preventing cross-contamination and comprehensively improving the device's corrosion resistance and purification efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the process flow structure of this utility model;

[0025] The reference numerals in the attached figures are:

[0026] 1. First regenerator chamber; 2. Second regenerator chamber; 3. Third regenerator chamber; 4. Combustion chamber; 5. Hot air return pipeline; 6. Preheating mixer; 7. RTO fan; 8. RTO inlet manifold; 9. RTO exhaust manifold; 10. Purge fan; 11. Regenerator chamber inlet or exhaust chamber; 121. Honeycomb ceramic regenerator layer; 13. Gas burner; 14. Hot air return flow regulating valve; 15. Temperature detector; 111. Regenerator chamber inlet shut-off valve; 112. Exhaust shut-off valve; 113. Purge air shut-off valve; 12. Purge air manifold; 61. Exhaust gas inlet; 62. Exhaust gas outlet; 63. Hot air return inlet. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0030] Example

[0031] like Figure 1As shown, this embodiment provides a corrosion-resistant organic waste gas heat storage thermal combustion purification device, including: a preheating mixer 6, a heat storage chamber group, a combustion chamber 4, an RTO fan 7, a hot air return pipeline 5, an RTO inlet main pipe 8, an RTO exhaust main pipe 9, a purge fan 10, and a purge air main pipe 12.

[0032] The preheating mixer 6 is equipped with an exhaust gas inlet 61, an exhaust gas outlet 62, and a hot air recirculation inlet 63. The high-temperature flue gas outlet of the combustion chamber 4 is connected to the hot air recirculation inlet 63 via the hot air recirculation pipe 5. The exhaust gas outlet 62 is connected to the inlet pipe of the RTO fan 7, and the outlet of the RTO fan 7 is connected to the first inlet end of the regenerator assembly via the RTO intake manifold 8. The outlet end of the regenerator assembly is connected to the inlet end of the RTO exhaust manifold 9. The combustion chamber 4 is located at the top of the regenerator assembly and is connected to the regenerator assembly. The purge fan 10 is connected to the second inlet end of the regenerator assembly via the purge air manifold 12. The function of the RTO fan 7 is to provide power for the exhaust gas flow.

[0033] The heat storage chamber assembly includes a first heat storage chamber 1, a second heat storage chamber 2, and a third heat storage chamber 3; these three chambers are arranged horizontally in parallel at the bottom of the combustion chamber 4, and their internal structures are identical. The tops of the first heat storage chamber 1, the second heat storage chamber 2, and the third heat storage chamber 3 are all connected to the combustion chamber 4; the interiors of the first heat storage chamber 1, the second heat storage chamber 2, and the third heat storage chamber 3 are each provided with a heat storage chamber inlet or exhaust chamber 11 and a honeycomb ceramic heat storage layer 121, arranged sequentially from bottom to top. The heat storage chamber inlet or exhaust chamber 11 serves as a transition space for gas flow and is used to connect external pipelines to the honeycomb ceramic heat storage layer 121.

[0034] The heat storage chamber inlet or outlet chamber 11 is fixedly equipped with a heat storage chamber inlet shut-off valve 111, and the inlet end of the heat storage chamber inlet shut-off valve 111 is connected to the outlet end of the RTO inlet manifold 8. The heat storage chamber inlet shut-off valve 111 is a pneumatic valve, and the function of the three heat storage chambers is switched by switching the valve's on / off state.

[0035] An exhaust shut-off valve 112 is fixedly installed at the outlet end of the heat storage chamber inlet or exhaust chamber 11, and the outlet end of the exhaust shut-off valve 112 is connected to the inlet end of the RTO exhaust manifold 9. The exhaust shut-off valve 112 is also a pneumatic valve, used to control the clean flue gas cooled by the heat storage chamber to enter the RTO exhaust manifold 9 for discharge. It works in conjunction with the heat storage chamber inlet shut-off valve 111 to ensure the conversion of heat release-heat storage-purging in the three heat storage chambers of the gas.

[0036] Each heat storage chamber inlet or outlet chamber 11 is fixedly equipped with a purge air shut-off valve 113, the inlet of which is connected to the outlet of the purge air main duct 12. The purge air shut-off valve 113 is an electric or pneumatic valve used to control whether the fresh air delivered by the purge blower 10 enters the corresponding heat storage chamber, thereby cleaning and purging the heat storage body.

[0037] The combustion chamber 4 is equipped with a gas burner 13 at the top, and the gas inlet of the gas burner 13 is connected to the gas pipeline. The gas burner 13 is equipped with an igniter and a flame detector, which heats the exhaust gas entering the combustion chamber to the combustion reaction temperature of organic pollutants (usually 750-850℃) to ensure that the pollutants are fully combusted and decomposed.

[0038] The hot air return pipeline 5 is equipped with a hot air return flow regulating valve 14; a temperature detector 15 is fixedly installed at the exhaust gas outlet 62 of the preheating mixer 6, and the temperature detector 15 is interlocked with the hot air return flow regulating valve 14. The temperature detector 15 monitors the temperature of the preheated exhaust gas in real time. When the temperature is lower than the set value, the hot air return flow regulating valve 14 automatically increases the opening to increase the high-temperature flue gas return flow; when the temperature is higher than the set value, the valve opening decreases to reduce the high-temperature flue gas return flow, thereby ensuring the stability of the exhaust gas preheating temperature.

[0039] During operation, corrosive organic waste gas (such as chlorinated organic waste gas) enters the equipment through the waste gas inlet 61 of the preheating mixer 6. Simultaneously, the RTO fan 7 starts, generating a suction effect that draws approximately 5% V / V high-temperature flue gas (780-850℃) from the combustion chamber 4 into the hot air return inlet 63 of the preheating mixer 6 via the hot air return pipe 5. The high-temperature flue gas and organic waste gas are thoroughly mixed within the preheating mixer 6, raising the waste gas temperature.

[0040] At 10℃-15℃, the temperature detector 15 monitors the temperature of the exhaust gas outlet 62 in real time and transmits the signal to the PLC system. By controlling the opening of the hot air return flow regulating valve 14, the exhaust gas temperature is kept stable.

[0041] After preheating, the exhaust gas is pressurized by RTO fan 7 and enters the heat storage chamber group through RTO inlet manifold 8. The device achieves continuous switching operation by alternately performing the "heating-heat storage-purging" process in three parallel heat storage chambers. The initial cycle is as follows:

[0042] First Regenerator Chamber (Heating Process): The PLC controls the opening of the inlet shut-off valve 111 of the first regenerator chamber 1, and the closing of the exhaust shut-off valve 112 and the purge air shut-off valve 113. Exhaust gas enters the inlet or exhaust chamber 11 of the first regenerator chamber 1, passes through the honeycomb ceramic regenerator layer 121 from bottom to top, absorbs the heat stored in the regenerator layer, and rises to 700-750℃. It then enters the combustion chamber 4 from the top. The combustion chamber 4 is heated to 750-850℃ by the gas burner at the top, and the organic pollutants in the exhaust gas are fully combusted and converted into CO2 and H2O.

[0043] Second Regenerator Chamber (Regenerator Process): The PLC controls the exhaust shut-off valve 112 of the second regenerator chamber 2 to open, and the regenerator chamber inlet shut-off valve 111 and purge air shut-off valve 113 to close. The high-temperature clean flue gas after combustion enters the second regenerator chamber 2 from the bottom of the combustion chamber 4, passes through the honeycomb ceramic regenerator layer 121 from top to bottom, and transfers heat to the regenerator layer. After the flue gas temperature drops to 100-200℃ after recovering heat energy through the regenerator layer, it enters the regenerator chamber inlet or exhaust chamber 11, and finally passes through the RTO exhaust manifold 9 to meet emission standards.

[0044] Third heat storage chamber (purging process): The PLC controls the opening of the purging air shut-off valve 113 of the third heat storage chamber 3, and the closing of the heat storage chamber inlet shut-off valve 111 and exhaust shut-off valve 112. The purging fan 10 sends fresh air through the purging air main pipe 12 into the heat storage chamber inlet or exhaust chamber 11 of the third heat storage chamber 3, purging the honeycomb ceramic heat storage layer 121 from bottom to top, and blowing the residual organic waste gas adsorbed on the surface of the heat storage layer into the combustion chamber 4 for combustion and purification.

[0045] After the above process is completed, the PLC system controls the valves to switch states: the second heat storage chamber 2 switches to the heating process, the third heat storage chamber 3 switches to the heat storage process, and the first heat storage chamber 1 switches to the purging process. Thereafter, the three heat storage chambers cycle in this order to achieve continuous purification of organic waste gas.

[0046] In summary, this invention introduces high-temperature flue gas from the combustion chamber into the preheating mixer via a hot air return pipeline to preheat the organic waste gas containing corrosive components. This prevents condensation of corrosive components in the cold waste gas on the inner walls of the equipment and pipelines, thus avoiding corrosion. Simultaneously, the interlocking control of a temperature detector and a hot air return flow regulating valve ensures stable waste gas temperature after preheating. The three regenerators are arranged in parallel and alternately perform the heating, heat storage, and purging processes. Combined with precise control of the shut-off valve, this achieves efficient heat recovery and removes residual organic waste gas from the regenerators through purging, preventing cross-contamination and comprehensively improving the device's corrosion resistance and purification stability.

[0047] The above description of this utility model is merely a preferred embodiment of this utility model and does not limit the implementation method and protection scope of this utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for purifying waste organic gas by regenerative thermal combustion with corrosion resistance, characterized in that, include: Preheating mixer (6), heat storage chamber group, combustion chamber (4), RTO fan (7), hot air return pipeline (5), RTO intake manifold (8), RTO exhaust manifold (9), purge fan (10), purge air manifold (12); The preheating mixer (6) is provided with an exhaust gas inlet (61), an exhaust gas outlet (62), and a hot air return inlet (63); The high-temperature flue gas outlet of the combustion chamber (4) is connected to the hot air return inlet (63) through the hot air return pipe (5); The exhaust gas outlet (62) is connected to the inlet pipe of the RTO fan (7), and the outlet of the RTO fan (7) is connected to the first inlet end of the heat storage chamber group through the RTO air intake manifold (8). The outlet end of the heat storage chamber group is connected to the inlet end of the RTO exhaust manifold (9), the combustion chamber (4) is located at the top of the heat storage chamber group, and the combustion chamber (4) is connected to the heat storage chamber group; The purge fan (10) is connected to the second inlet end of the heat storage chamber group through the purge air main pipe (12).

2. The apparatus of claim 1, wherein, The heat storage chamber group includes: a first heat storage chamber (1), a second heat storage chamber (2), and a third heat storage chamber (3); The top of the first heat storage chamber (1), the top of the second heat storage chamber (2), and the top of the third heat storage chamber (3) are all connected to the combustion chamber (4). The interior of the first heat storage chamber (1), the interior of the second heat storage chamber (2), and the interior of the third heat storage chamber (3) are provided with heat storage chamber inlet or outlet chamber (11) and honeycomb ceramic heat storage layer (121) from bottom to top.

3. The apparatus of claim 2, wherein, A heat storage chamber inlet or outlet chamber (11) is fixedly provided with a heat storage chamber inlet shut-off valve (111), and the inlet end of the heat storage chamber inlet shut-off valve (111) is connected to the outlet end of the RTO inlet manifold (8).

4. The apparatus of claim 2, wherein, An exhaust shut-off valve (112) is fixedly provided at the outlet end of the heat storage chamber inlet or exhaust chamber (11), and the outlet end of the exhaust shut-off valve (112) is connected to the inlet end of the RTO exhaust manifold (9).

5. The apparatus of claim 2, wherein, A purge air shut-off valve (113) is fixedly provided at the second inlet end of the heat storage chamber inlet or outlet chamber (11), and the inlet end of the purge air shut-off valve (113) is connected to the outlet end of the purge air main pipe (12).

6. The apparatus of claim 1, wherein, The combustion chamber (4) is provided with a gas burner (41) at the top, and the gas inlet of the gas burner (41) is connected to the gas pipeline.

7. The apparatus of claim 1, wherein, The hot air return pipeline (5) is equipped with a hot air return flow regulating valve (51).

8. The apparatus of claim 7, wherein, A temperature detector (TC-01) is fixedly installed at the exhaust gas outlet (62) of the preheating mixer (6), and the temperature detector (TC-01) is interlocked with the hot air return flow regulating valve (51).

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