Incineration system for cooperatively processing large-air-volume low-concentration waste gas and small-air-volume high-concentration waste gas and operation method thereof

Abstract

According to the method, the high-concentration waste gas and the low-concentration waste gas are not premixed in advance, an independent incineration chamber is arranged for treating the high-concentration waste gas, a heat storage bed is not arranged in the incineration chamber, and a combustor is arranged in the incineration chamber; the combustor uses high-concentration waste gas as fuel and low-concentration oxygen-containing waste gas as combustion-supporting air. Three heat storage incineration chambers are arranged and used for treating low-concentration waste gas, lifting valves are arranged at an inlet and an outlet of each heat storage incineration chamber, during normal operation, opening and closing of the lifting valves are controlled through a time sequence, one lifting valve serves as an air inlet chamber, one lifting valve serves as an air outlet chamber, and the other lifting valve serves as a purging chamber. In this way, it is ensured that all waste gas can be discharged to reach the standard, and the safety and the optimal cost of the operation process are also ensured. The problems of potential safety hazards and overhigh energy consumption when high-concentration and low-concentration waste gases are simultaneously treated by a traditional RTO technology are solved.

Description

Technical Field

[0001] The present invention relates to an incineration system for waste gas and its operation method, and particularly to an incineration system and its operation method for co-processing large-volume low-concentration waste gas and small-volume high-concentration waste gas. Background Art

[0002] RTO (Regenerative Thermal Oxidizer) has always been the primary choice for VOCs waste gas treatment. However, since RTO is a premixed incineration, that is, the premixing of waste gas and oxygen has been completed before the waste gas enters the RTO furnace, and the lower explosion limit gradually decreases with the increase of temperature. Therefore, to ensure the safe and stable operation of the RTO furnace, it is necessary to ensure that the organic matter concentration in the waste gas entering the RTO furnace is lower than 25% of the lower explosion limit.

[0003] However, for most factories at present, especially in the chemical industry, in addition to a large amount of low-concentration waste gas, there will also be a small amount of high-concentration waste gas. If the high-concentration waste gas and low-concentration waste gas are mixed and then enter the RTO furnace for incineration, the organic matter concentration in the waste gas is higher than 25% of the lower explosion limit, and a large amount of air needs to be supplemented to reduce the concentration of the waste gas to ensure that the organic matter concentration in the waste gas is lower than 25% of the lower explosion limit. In addition, if air is supplemented at the front end, the tail gas emission standard needs to be converted for oxygen, resulting in non-compliance of the tail gas emission.

[0004] If the small amount of high-concentration waste gas is treated separately, the investment cost is high. If the overall treatment process is replaced and a TO furnace is used to treat all waste gas, since the amount of low-concentration waste gas is much larger than that of high-concentration waste gas, TO needs to supplement a large amount of natural gas, and the operating cost is too high. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art, and provide an incineration system and its operation method for co-processing large-volume low-concentration waste gas and small-volume high-concentration waste gas, which can not only safely treat high-concentration waste gas, but also maximize the utilization of the heat of the flue gas, save fuel, and improve the incineration efficiency.

[0006] The present invention adopts the following technical solutions:

[0007] An incineration system for co-processing large-volume low-concentration waste gas and small-volume high-concentration waste gas of the present invention includes a first adiabatic incineration chamber, a first regenerative incineration chamber, a second regenerative incineration chamber, and a third regenerative incineration chamber which are sequentially arranged at intervals from left to right. The tops of the first adiabatic incineration chamber, the first regenerative incineration chamber, the second regenerative incineration chamber, and the third regenerative incineration chamber are connected to the bottom wall of the second adiabatic incineration chamber.

[0008] The waste gas burner is installed at the bottom of the first adiabatic incineration chamber. The outlet of the high-concentration waste gas pipeline equipped with a high-concentration waste gas cut-off valve is communicated with the main air inlet of the waste gas burner; heat storage bodies are installed in the first heat storage incineration chamber, the second heat storage incineration chamber, and the third heat storage incineration chamber. There is a flue gas space left between each heat storage body and the bottom wall of the corresponding heat storage incineration chamber;

[0009] The outlet of the low-concentration waste gas fan is communicated with the auxiliary air inlet of the waste gas burner through the first low-concentration waste gas branch equipped with a first low-concentration waste gas cut-off valve. The outlet of the low-concentration waste gas fan is communicated with the inlet of the second low-concentration waste gas branch equipped with a second low-concentration waste gas cut-off valve. The outlet of the second low-concentration waste gas branch is connected to the inlets of three low-concentration waste gas inlet branches respectively equipped with intake lift valves. The outlets of the three low-concentration waste gas inlet branches are respectively connected to the flue gas spaces of the first heat storage incineration chamber, the second heat storage incineration chamber, and the third heat storage incineration chamber;

[0010] The three flue gas spaces are respectively communicated with the inlet of the mixer through the flue gas outlet branch equipped with an outlet lift valve and the bypass outlet branch of the second adiabatic incineration chamber equipped with an emergency heat bypass valve. The outlet of the mixer is communicated with the bottom inlet of the chimney through a connecting pipeline;

[0011] The outlet of the purge fan is respectively communicated with the flue gas spaces of the first heat storage incineration chamber, the second heat storage incineration chamber, and the third heat storage incineration chamber through three purge pipeline branches respectively equipped with purge valves. The inlet of the purge fan is communicated with the three flue gas outlet branches.

[0012] An operating method of an incineration system for co-processing large-volume low-concentration waste gas and small-volume high-concentration waste gas according to the present invention includes the following steps:

[0013] Step 1: When the device is operating normally, high-concentration waste gas with an explosion lower limit greater than or equal to 25% LEL and a pressure > 30 kPag enters the waste gas burner through the high-concentration waste gas cut-off valve for combustion, so that the temperature of the first adiabatic incineration chamber is not lower than 850 °C. At the same time, low-concentration waste gas with an explosion lower limit lower than 25% LEL is sent into the device by a fan and is divided into two paths. The first path enters the waste gas burner through the first low-concentration waste gas cut-off valve; during this process, the first heat storage incineration chamber, the second heat storage incineration chamber, and the third heat storage incineration chamber perform cyclic air intake and exhaust switching through the intake lift valve and the exhaust lift valve. One serves as the intake chamber, one serves as the exhaust chamber, and one serves as the purge chamber. The specific process is as follows:

[0014] In the first stage, the first regenerative incineration chamber serves as the intake chamber, the second regenerative incineration chamber serves as the exhaust chamber, and the third regenerative incineration chamber serves as the purging chamber. The second low-concentration waste gas passes through the second low-concentration waste gas cut-off valve and then enters the first regenerative incineration chamber through the intake lift valve connected to the first regenerative incineration. It flows upward through the first regenerative incineration chamber. During this process, the heat storage body in the first regenerative incineration chamber transfers heat to the low-concentration waste gas, and the low-concentration waste gas is preheated. Then it reaches the second adiabatic incineration chamber. In the second adiabatic incineration chamber, the waste gas is heated to the final reaction temperature of 850 °C, and the organic matter is completely oxidized. At the same time, the high-temperature flue gas generated after incineration will flow downward through the second regenerative incineration chamber, transfer the heat of the flue gas to the heat storage body in the second regenerative incineration chamber and become low-temperature clean flue gas. The low-temperature clean flue gas then passes through the exhaust lift valve connected to the second regenerative incineration chamber. Part of the low-temperature clean flue gas enters the purging fan. The purging fan blows the low-temperature clean flue gas after incineration into the third regenerative incineration chamber again through the purging valve connected to the third regenerative incineration chamber, and blows the unburned low-temperature flue gas at the bottom of the third regenerative incineration chamber into the second adiabatic incineration chamber again for complete incineration. After this stage is completed, the second stage is executed;

[0015] In the second stage, the second regenerative incineration chamber serves as the intake chamber, the third regenerative incineration chamber serves as the exhaust chamber, and the first regenerative incineration chamber serves as the purging chamber. During this process, the intake chamber, exhaust chamber, and purging chamber in the second stage respectively adopt the same gas circulation methods as the intake chamber, exhaust chamber, and purging chamber in the first stage;

[0016] In the third stage, the third regenerative incineration chamber serves as the intake chamber, the first regenerative incineration chamber serves as the exhaust chamber, and the second regenerative incineration chamber serves as the purging chamber. During this process, the intake chamber, exhaust chamber, and purging chamber in the third stage respectively adopt the same gas circulation methods as the intake chamber, exhaust chamber, and purging chamber in the first stage;

[0017] In the fourth stage, after the three stages are completed, the first to third stages are repeated again and the operation is continuously cycled;

[0018] Step 2: When the temperature of the incinerator is higher than 950 °C, the emergency hot bypass valve opens, and the high-temperature flue gas in the second adiabatic incineration chamber is directly discharged, and is mixed with the low-temperature flue gas coming out of the regenerative incineration chamber serving as the exhaust chamber and then discharged to the chimney.

[0019] Advantages of the present invention:

[0020] 1. It can not only energy-efficiently treat large-volume low-concentration waste gas, but also efficiently and synergistically treat high-concentration waste gas, without the need for additional supplementary fuel gas.

[0021] 2. The high-concentration waste gas enters the incinerator separately through the burner. The high-concentration waste gas has a separate incineration space, ensuring the incineration temperature and the residence time of the flue gas, and ensuring the incineration efficiency.

[0022] 3. Before entering the incinerator, the high-concentration waste gas and the low-concentration waste gas are not mixed. The organic matter concentration in the low-concentration waste gas is lower than 25% of the lower explosion limit, and the high-concentration waste gas does not contain oxygen. Both can enter the incinerator safely and stably without explosion risk.

[0023] 4. The combustion-supporting air of the burner uses the low-concentration waste gas without the incorporation of fresh air, saving fuel and cost.

[0024] 5. The purging air uses the clean flue gas after incineration without the incorporation of air, saving fuel and cost.

[0025] 6. The low-concentration waste gas enters and exits the incinerator through three cyclically switched chambers, which can not only ensure the incineration efficiency of the low-concentration waste gas but also maximize the utilization of the heat of the flue gas and save fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of an incineration system for co-processing a large volume of low-concentration waste gas and a small volume of high-concentration waste gas according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0028] As shown in the drawings, an incineration system for co-processing a large volume of low-concentration waste gas and a small volume of high-concentration waste gas according to the present invention includes a first adiabatic incineration chamber 2, a first regenerative incineration chamber 3, a second regenerative incineration chamber 4, and a third regenerative incineration chamber 5 that are sequentially arranged at intervals from left to right. The tops of the first adiabatic incineration chamber 2, the first regenerative incineration chamber 3, the second regenerative incineration chamber 4, and the third regenerative incineration chamber 5 are communicated with the bottom wall of the second adiabatic incineration chamber 1.

[0029] The waste gas burner 6 is installed at the bottom of the first adiabatic incineration chamber 2 and does not contain a regenerator inside. The outlet of the high-concentration waste gas pipeline equipped with the high-concentration waste gas cut-off valve 10 is communicated with the main air inlet of the waste gas burner. Regenerators 16 are installed in the first regenerative incineration chamber 3, the second regenerative incineration chamber 4, and the third regenerative incineration chamber 5, and a flue gas space is left between each regenerator and the bottom wall of the corresponding regenerative incineration chamber.

[0030] The outlet of the low-concentration waste gas fan 13 is communicated with the auxiliary air inlet of the waste gas burner through the first low-concentration waste gas branch with the first low-concentration waste gas cut-off valve 11 installed. The outlet of the low-concentration waste gas fan 13 is communicated with the inlet of the second low-concentration waste gas branch with the second low-concentration waste gas cut-off valve 12 installed. The outlet of the second low-concentration waste gas branch is connected to the inlets of three low-concentration waste gas inlet branches respectively installed with the intake lift valves 7. The outlets of the three low-concentration waste gas inlet branches are respectively connected to the flue gas spaces of the first regenerative incineration chamber 3, the second regenerative incineration chamber 4, and the third regenerative incineration chamber 5.

[0031] The three flue gas spaces are respectively communicated with the inlet of the mixer 15 through the flue gas outlet branch installed with the outlet lift valve 8 and the bypass outlet branch installed with the emergency hot bypass valve 17 through the second adiabatic incineration chamber 1. The outlet of the mixer 15 is communicated with the bottom inlet of the chimney 18 through a connecting pipeline.

[0032] The outlet of the purge fan 14 is communicated with the flue gas spaces of the first regenerative incineration chamber 3, the second regenerative incineration chamber 4, and the third regenerative incineration chamber 5 respectively through three purge pipeline branches respectively installed with the purge valves 9. The inlet of the purge fan 14 is communicated with the three flue gas outlet branches.

[0033] The first regenerative incineration chamber 3, the second regenerative incineration chamber 4, and the third regenerative incineration chamber perform cyclic inlet and outlet gas switching through the intake lift valve 7 and the outlet lift valve 8 to ensure full recovery and utilization of heat.

[0034] The high-concentration waste gas cut-off valve 10 controls the entry of high-concentration waste gas into the waste gas burner 6. The first low-concentration waste gas cut-off valve 11 and the second low-concentration waste gas cut-off valve 12 respectively control the entry of low-concentration waste gas into the waste gas burner 6 and the regenerative incineration chamber.

[0035] The intake lift valve 7, the high-concentration waste gas cut-off valve 10, the purge valve 9, the first low-concentration waste gas cut-off valve 11, and the second low-concentration waste gas cut-off valve 12 are arranged at the inlet of the incineration system.

[0036] The outlet lift valve 8 and the emergency hot bypass valve 17 are arranged at the outlet of the incineration system.

[0037] The purge fan 14 blows the clean flue gas after incineration into the bottom of the regenerative incineration chamber again, and sends the unprocessed waste gas at the bottom of the regenerative incineration chamber into the adiabatic incineration chamber 1 for incineration again. Only 1 regenerative incineration chamber is purged at the same time, and the purging sequence is switched through the 3 purge valves 9.

[0038] The emergency hot bypass valve 17 controls the flue gas volume of the high-temperature flue gas out of the adiabatic incineration chamber 1.

[0039] The mixer 15 is used for mixing high-temperature flue gas and low-temperature flue gas.

[0040] The chimney 18 is used for discharging the clean flue gas.

[0041] A method for operating an incineration system for co-processing large-volume low-concentration waste gas and small-volume high-concentration waste gas according to the present invention includes the following steps:

[0042] Step 1: When the device is operating normally, the high-concentration waste gas with an explosion lower limit greater than or equal to 25% LEL and a pressure > 30 kPag enters the waste gas burner 6 through the high-concentration waste gas cut-off valve 10 for combustion, so that the temperature of the first adiabatic incineration chamber 2 is not lower than 850 °C. At the same time, the low-concentration waste gas with an explosion lower limit lower than 25% LEL is sent into the device through the fan 13 and is divided into two paths. The first path enters the waste gas burner 6 through the first low-concentration waste gas cut-off valve 11; during this process, the first regenerative incineration chamber 3, the second regenerative incineration chamber 4, and the third regenerative incineration chamber perform cyclic intake and exhaust gas switching through the intake lift valve 7 and the exhaust lift valve 8. One is used as the intake chamber, one is used as the exhaust chamber, and one is used as the purge chamber. The specific process is as follows:

[0043] The first stage: The first regenerative incineration chamber 3 is used as the intake chamber, the second regenerative incineration chamber 4 is used as the exhaust chamber, and the third regenerative incineration chamber 5 is used as the purge chamber. The second path of the low-concentration waste gas passes through the second low-concentration waste gas cut-off valve 12 and then enters the first regenerative incineration chamber 3 through the intake lift valve 7 connected to the first regenerative incineration, flowing from bottom to top through the first regenerative incineration chamber 3. During this process, the heat storage body 16 in the first regenerative incineration chamber transfers heat to the low-concentration waste gas, and the low-concentration waste gas is preheated (the temperature is usually 600 - 800 °C

[0044] ), and then reaches the second adiabatic incineration chamber 1. In the second adiabatic incineration chamber 1, the waste gas is heated to the final reaction temperature of 850 °C, and the organic matter is completely oxidized. At the same time, the high-temperature flue gas generated after incineration will flow from top to bottom through the second regenerative incineration chamber 4, transfer the heat of the flue gas to the heat storage body 16 in the second regenerative incineration chamber and become low-temperature clean flue gas (the temperature is usually 80 - 100 °C). The low-temperature clean flue gas then passes through the exhaust lift valve 8 connected to the second regenerative incineration chamber. Part of the low-temperature clean flue gas enters the purge fan, and the purge fan 14 blows the low-temperature clean flue gas after incineration into the third regenerative incineration chamber 5 again through the purge valve 9 connected to the third regenerative incineration chamber, and blows the low-temperature flue gas that has not been incinerated at the bottom of the third regenerative incineration chamber 5 into the second adiabatic incineration chamber 1 again for complete incineration. After this stage is completed, the second stage is executed;

[0045] The second stage: The second regenerative incineration chamber 4 is used as the intake chamber, the third regenerative incineration chamber 5 is used as the exhaust chamber, and the first regenerative incineration chamber 3 is used as the purge chamber. During this process, the intake chamber, the exhaust chamber, and the purge chamber respectively adopt the same gas circulation steps of the intake chamber, the exhaust chamber, and the purge chamber in the first stage;

[0046] In the third stage, the third regenerative incineration chamber 5 serves as the intake chamber, the first regenerative incineration chamber 3 serves as the exhaust chamber, and the second regenerative incineration chamber 4 serves as the purging chamber. During this process, the intake chamber, the exhaust chamber, and the purging chamber respectively adopt the same gas circulation steps as those of the intake chamber, the exhaust chamber, and the purging chamber in the first stage;

[0047] In the fourth stage, after the three stages are completed, the first to third stages are repeated again and run in a cycle continuously.

[0048] Preferably, the volume flow ratio of the intake air volume of the low-concentration waste gas to the intake air volume of the high-concentration waste gas is greater than 10, so that the flow field is uniform and the incineration efficiency is high. For example, the intake air volume of the low-concentration waste gas > 10000 Nm 3 / h; small air volume: the intake air volume of the high-concentration waste gas < 1000 Nm 3 / h.

[0049] Step 2: When the total heat of the waste gas entering the device is relatively high, that is, when the temperature of the incinerator is higher than 950 °C, the emergency heat bypass valve 17 is opened, and the high-temperature flue gas in the second adiabatic incineration chamber 1 is directly discharged, and is mixed with the low-temperature flue gas coming out of the regenerative incineration chamber serving as the exhaust chamber and then discharged to the chimney 18.

[0050] In this method, the low-concentration waste gas entering the waste gas burner 6 through the first low-concentration waste gas cut-off valve 11 is used as the combustion-supporting air for the high-concentration waste gas. No new air is introduced into the incineration device.

[0051] The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many deformations without departing from the purpose of the present invention and the scope protected by the claims, and these all belong to the protection scope of the present invention.

Claims

1. An incineration system for co-processing high-volume low-concentration waste gas and small-volume high-concentration waste gas, characterized in that: It includes a first adiabatic incineration chamber (2), a first regenerative incineration chamber (3), a second regenerative incineration chamber (4), and a third regenerative incineration chamber (5) which are arranged at intervals from left to right. The tops of the first adiabatic incineration chamber, the first regenerative incineration chamber, the second regenerative incineration chamber, and the third regenerative incineration chamber are communicated with the bottom wall of the second adiabatic incineration chamber (1). An exhaust gas burner (6) is installed at the bottom of the first adiabatic incineration chamber. The outlet of the high-concentration exhaust gas pipeline equipped with a high-concentration exhaust gas cut-off valve (10) is communicated with the main intake port of the exhaust gas burner. Regenerators (16) are installed in the first regenerative incineration chamber, the second regenerative incineration chamber, and the third regenerative incineration chamber. A flue gas space is left between each regenerator and the bottom wall of the corresponding regenerative incineration chamber. The outlet of the low-concentration exhaust gas fan (13) is communicated with the auxiliary intake port of the exhaust gas burner through a first low-concentration exhaust gas branch equipped with a first low-concentration exhaust gas cut-off valve (11). The outlet of the low-concentration exhaust gas fan is communicated with the inlet of a second low-concentration exhaust gas branch equipped with a second low-concentration exhaust gas cut-off valve (12). The outlet of the second low-concentration exhaust gas branch is connected to the inlets of three low-concentration exhaust gas intake branches respectively equipped with intake lift valves (7). The outlets of the three low-concentration exhaust gas intake branches are respectively connected to the flue gas spaces of the first regenerative incineration chamber, the second regenerative incineration chamber, and the third regenerative incineration chamber. The three flue gas spaces are respectively communicated with the inlet of the mixer (15) through a flue gas outlet branch equipped with an outlet lift valve (8) and the second adiabatic incineration chamber through a bypass outlet branch equipped with an emergency heat bypass valve (17). The outlet of the mixer is communicated with the bottom inlet of the chimney (18) through a connecting pipeline. The outlet of the purge fan (14) is communicated with the flue gas spaces of the first regenerative incineration chamber, the second regenerative incineration chamber, and the third regenerative incineration chamber respectively through three purge pipeline branches each equipped with a purge valve. The inlet of the purge fan is communicated with the three flue gas outlet branches.

2. A running method of an incineration system for co-processing large-volume low-concentration exhaust gas and small-volume high-concentration exhaust gas as described in claim 1, comprising the following steps: Step 1: When the device is operating normally, high-concentration exhaust gas with an explosion lower limit greater than or equal to 25% LEL and a pressure > 30 kPag enters the exhaust gas burner through the high-concentration exhaust gas cut-off valve for combustion, so that the temperature of the first adiabatic incineration chamber is not lower than 850°C. At the same time, low-concentration exhaust gas with an explosion lower limit lower than 25% LEL is sent into the device by a fan and is divided into two paths. The first path enters the exhaust gas burner through the first low-concentration exhaust gas cut-off valve. During this process, the first regenerative incineration chamber, the second regenerative incineration chamber, and the third regenerative incineration chamber perform cyclic air intake and exhaust switching through the intake lift valve and the outlet lift valve. One serves as the intake chamber, one serves as the exhaust chamber, and one serves as the purge chamber. The specific process is as follows: In the first stage, the first regenerative incineration chamber serves as the intake chamber, the second regenerative incineration chamber serves as the outlet chamber, and the third regenerative incineration chamber serves as the purging chamber. The second low-concentration waste gas passes through the second low-concentration waste gas cut-off valve and then enters the first regenerative incineration chamber through the intake lift valve connected to the first regenerative incineration. It flows upward through the first regenerative incineration chamber. During this process, the heat storage body in the first regenerative incineration chamber transfers heat to the low-concentration waste gas, and the low-concentration waste gas is preheated. Then it reaches the second adiabatic incineration chamber. In the second adiabatic incineration chamber, the waste gas is heated to the final reaction temperature of 850 °C, and the organic matter is completely oxidized. At the same time, the high-temperature flue gas generated after incineration will flow downward through the second regenerative incineration chamber, transfer the heat of the flue gas to the heat storage body in the second regenerative incineration chamber and become low-temperature clean flue gas. The low-temperature clean flue gas then passes through the outlet lift valve connected to the second regenerative incineration chamber. Part of the low-temperature clean flue gas enters the purging fan. The purging fan blows the low-temperature clean flue gas after incineration into the third regenerative incineration chamber again through the purging valve connected to the third regenerative incineration chamber, and blows the low-temperature flue gas that has not been incinerated at the bottom of the third regenerative incineration chamber into the second adiabatic incineration chamber for complete incineration. After this stage is completed, the second stage is executed; In the second stage, the second regenerative incineration chamber serves as the intake chamber, the third regenerative incineration chamber serves as the outlet chamber, and the first regenerative incineration chamber serves as the purging chamber. During this process, the intake chamber, outlet chamber, and purging chamber in the second stage respectively adopt the same gas circulation method as the intake chamber, outlet chamber, and purging chamber in the first stage; In the third stage, the third regenerative incineration chamber serves as the intake chamber, the first regenerative incineration chamber serves as the outlet chamber, and the second regenerative incineration chamber serves as the purging chamber. During this process, the intake chamber, outlet chamber, and purging chamber in the third stage respectively adopt the same gas circulation method as the intake chamber, outlet chamber, and purging chamber in the first stage; In the fourth stage, after the three stages are completed, the first to third stages are repeated again and run in a cycle all the time; Step 2: When the temperature of the incinerator is higher than 950 °C, the emergency heat bypass valve opens, and the high-temperature flue gas in the second adiabatic incineration chamber is directly discharged and mixed with the low-temperature flue gas coming out of the regenerative incineration chamber serving as the outlet chamber and then discharged to the chimney.

3. The operation method of an incineration system for co-processing large-volume low-concentration waste gas and small-volume high-concentration waste gas according to claim 2, characterized in that: The volume flow ratio of the intake air volume of the low-concentration waste gas to the intake air volume of the high-concentration waste gas is greater than 10.

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