Four-tower heat accumulating type oxidizing furnace

Abstract

The utility model discloses a four-tower heat accumulating type oxidizing furnace which comprises a furnace body, a gas inlet main pipe, a gas exhaust main pipe, a purging main pipe and a reverse combustion main pipe, a combustion chamber and four heat accumulating chambers are arranged in the furnace body, and the four heat accumulating chambers are communicated with the combustion chamber; a waste gas inlet is formed in one end of the gas inlet main pipe, a gas inlet fan is arranged on the gas inlet main pipe, and the gas inlet main pipe is connected with four gas inlet branch pipes; one end of the exhaust main pipe is provided with a waste gas exhaust port, and the exhaust main pipe is connected with four exhaust branch pipes; one end of the purging main pipe is communicated with the waste gas inlet, and the purging main pipe is connected with four purging branch pipes; a cold air inlet is formed in one end of the reverse combustion main pipe, a reverse combustion cooling fan is arranged on the reverse combustion main pipe, and the reverse combustion main pipe is connected with four reverse combustion branch pipes. According to the utility model, through the reverse combustion process, the temperature of the low-temperature area of the heat storage material at the lower part of the heat storage chamber is increased, the originally deposited viscous substance is heated and gasified, and the low-temperature area of the heat storage material is cleaned.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, specifically relating to a four-tower regenerative oxidizer. Background Technology

[0002] Regenerative Thermal Oxidizers (RTOs) excel in purification efficiency and are widely used to treat exhaust gases from printing and packaging, coating, and pharmaceutical industries. Their purification efficiency exceeds 98%, and their thermal utilization efficiency reaches over 95%, significantly reducing energy consumption. With increasingly stringent environmental protection requirements, RTO technology plays an increasingly important role in waste gas treatment, helping to reduce air pollutant emissions and improve air quality. It is an indispensable pollution control device in many industrial sectors.

[0003] Conventional regenerative thermal oxidizers consist of three, five, or more odd-numbered chambers. For example, a three-chamber system operates with one inlet, one outlet, and one purging cycle; a five-chamber system operates with two inlets, two outlets, and one purging cycle. However, in certain manufacturing industries, such as asphalt mixing, waterproofing materials, coke production, and phthalic anhydride preparation, the organic waste gas generated during production processes is often quite complex, containing tar-like viscous substances. These tar-like viscous substances form deposits in the low-temperature zone of the regenerative thermal oxidizer's heat storage material, adhering to all surfaces through which the waste gas passes. Because the waste gas passages in regenerative thermal oxidizers are narrow and their surface area is very large, these materials are easily clogged by tar-like viscous substances. This clogging can lead to the following consequences: Blockage of the heat storage material's inner surface will cause equipment interruptions, preventing long-term operation and affecting normal production, resulting in unplanned shutdowns. Furthermore, the viscous substances, once deposited, pose a serious safety hazard; if ignited by high temperatures, they can cause a fire. Utility Model Content

[0004] The purpose of this invention is to provide a four-tower regenerative oxidation furnace to solve the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a four-tower regenerative oxidizer, comprising a furnace body, an inlet main pipe, an exhaust main pipe, a purging main pipe, and a reverse combustion main pipe. The furnace body contains a combustion chamber and four regenerator chambers, which are spaced apart and all four regenerator chambers are connected to the combustion chamber. One end of the inlet main pipe has a waste gas inlet, and an inlet fan is mounted on it. The inlet main pipe is connected to four inlet branch pipes, each corresponding to one of the four regenerator chambers. One end of the exhaust main pipe has a waste gas outlet, and the exhaust main pipe is connected to four exhaust branch pipes, each corresponding to one of the four regenerator chambers. One end of the purging main pipe… The main purging pipe is connected to the exhaust gas inlet and has four purging branch pipes. Each of the four purging branch pipes is connected to one of the four heat storage chambers. The purging branch pipes are used to transport the gas from the combustion chamber through one of the heat storage chambers to the main purging pipe, and then use the intake pipe to transport the gas to the other heat storage chambers, thereby sending the incompletely combusted gas back to the combustion chamber for re-combustion. One end of the back-combustion main pipe is provided with a cold air inlet, and a back-combustion cooling fan is provided on the back-combustion main pipe. The back-combustion main pipe is connected to four back-combustion branch pipes, each of the four back-combustion branch pipes is connected to one of the four heat storage chambers. The back-combustion main pipe is used to introduce cold air and transport it to the heat storage chamber through the back-combustion branch pipes. The heat storage chamber achieves the back-combustion function through the mixing and circulation of hot and cold gases.

[0006] As an optional implementation of the above technical solution, both the combustion chamber and the heat storage chamber have an insulation layer on their inner walls.

[0007] As an optional implementation of the above technical solution, the combustion chamber is provided with a flame observation port, and the heat storage chamber is provided with an inspection door.

[0008] As an optional implementation of the above technical solution, the exhaust outlet is connected to a chimney.

[0009] As an optional implementation of the above technical solution, an intake booster valve is provided on the intake branch pipe.

[0010] As an optional implementation of the above technical solution, the exhaust branch pipe is provided with an exhaust booster valve.

[0011] As an optional implementation of the above technical solution, the purging branch pipe is equipped with a return air valve.

[0012] As an optional implementation of the above technical solution, the anti-burning branch pipe is provided with an anti-burning valve.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. By designing a reverse combustion main pipe, one of the regenerator chambers is used as a reverse combustion chamber. The heat stored in the regenerator chamber is used to heat up the low-temperature zone of the heat storage material at the bottom of the regenerator chamber through the reverse combustion process. The originally deposited viscous substances are heated and vaporized. The low-temperature zone of these heat storage materials is cleaned. The gas phase passes through the purge branch pipe, purge main pipe, intake main pipe, intake branch pipe and regenerator chamber in sequence and then returns to the combustion chamber for secondary incineration treatment, which meets the environmental protection emission standards of the reverse combustion process.

[0015] 2. The four-tower design increases the volume of the combustion chamber and extends the residence time of the exhaust gas in the combustion chamber, thereby improving the conversion efficiency of exhaust gas incineration.

[0016] 3. It will not increase the user's energy consumption or add extra energy costs to the user's usage. Attached Figure Description

[0017] Figure 1 This is a front structural diagram of a four-tower regenerative oxidizer in one embodiment of this utility model;

[0018] Figure 2 This is a top view of a four-tower regenerative oxidizer in one embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of a four-tower regenerative oxidation furnace in one embodiment of this utility model.

[0020] In the diagram: 1-furnace body; 2-inlet main pipe; 3-exhaust main pipe; 4-purge main pipe; 5-reverse combustion main pipe; 6-combustion chamber; 7-regenerator chamber; 8-exhaust gas inlet; 9-inlet fan; 10-purge branch pipe; 11-reverse combustion cooling fan; 12-reverse combustion branch pipe; 13-insulation layer; 14-flame observation port; 15-inspection door; 16-chimney; 17-inlet lift valve; 18-exhaust lift valve; 19-return air valve; 20-reverse combustion valve. Detailed Implementation

[0021] like Figures 1-3 As shown, this embodiment provides a four-tower regenerative oxidation furnace, including a furnace body 1, an inlet main pipe 2, an exhaust main pipe 3, a purging main pipe 4, and a backfire main pipe 5. A support frame is provided at the bottom of the furnace body 1. The furnace body 1 contains one combustion chamber 6 and four regenerator chambers 7, which are spaced apart and all four regenerator chambers 7 are connected to the combustion chamber 6. The four regenerator chambers 7 are designated as regenerator chamber A, regenerator chamber B, regenerator chamber C, and regenerator chamber D. Figure 1 and Figure 3 As shown, the combustion chamber 6 is located on top of the heat storage chamber 7. Both the combustion chamber 6 and the heat storage chamber 7 have an insulation layer 13 on their inner walls. The combustion chamber 6 has a flame observation port 14, and the heat storage chamber 7 has an inspection door 15 with a sealing ring to prevent gas leakage.

[0022] One end of the main intake pipe 2 is provided with an exhaust gas inlet 8. An intake fan 9 is provided on the main intake pipe 2. The main intake pipe 2 is connected to four intake branch pipes, which are connected one-to-one with four heat storage chambers 7. Each intake branch pipe is provided with an intake lift valve 17. The four intake branch pipes are intake branch pipe A, intake branch pipe B, intake branch pipe C, and intake branch pipe D. Intake branch pipe A is connected to heat storage chamber A, intake branch pipe B is connected to heat storage chamber B, intake branch pipe C is connected to heat storage chamber C, and intake branch pipe D is connected to heat storage chamber D. Intake branch pipe A is provided with an intake lift valve A, intake branch pipe B is provided with an intake lift valve B, intake branch pipe C is provided with an intake lift valve C, and intake branch pipe D is provided with an intake lift valve D.

[0023] One end of the main exhaust pipe 3 is provided with an exhaust gas outlet, which is connected to a chimney 16. The main exhaust pipe 3 is connected to four exhaust branch pipes, which are connected one-to-one with four heat storage chambers 7. Each exhaust branch pipe is equipped with an exhaust lift valve 18. The four exhaust branch pipes are exhaust branch pipe A, exhaust branch pipe B, exhaust branch pipe C, and exhaust branch pipe D. Exhaust branch pipe A is connected to heat storage chamber A, exhaust branch pipe B is connected to heat storage chamber B, exhaust branch pipe C is connected to heat storage chamber C, and exhaust branch pipe D is connected to heat storage chamber D. Exhaust branch pipe A is equipped with an exhaust lift valve A, exhaust branch pipe B is equipped with an exhaust lift valve B, exhaust branch pipe C is equipped with an exhaust lift valve C, and exhaust branch pipe D is equipped with an exhaust lift valve D.

[0024] like Figure 2 As shown, one end of the main purge pipe 4 is connected to the exhaust gas inlet 8. The main purge pipe 4 is connected to four purge branch pipes 10, which are connected one-to-one with the four heat storage chambers 7. Each purge branch pipe 10 is equipped with a return air valve 19. The purge branch pipes 10 are used to transport the gas from the combustion chamber 6 through one of the heat storage chambers 7 to the main purge pipe 4, and then use the intake pipe 2 to transport the gas to the other heat storage chambers 7, thereby sending the incompletely combusted gas back to the combustion chamber 6 for re-combustion. The four main purge pipes 4 are purge pipe A, purge pipe B, purge pipe C, and purge pipe D. Purge pipe A is connected to heat storage chamber A, purge pipe B is connected to heat storage chamber B, purge pipe C is connected to heat storage chamber C, and purge pipe D is connected to heat storage chamber D. Each purge pipe has a return air valve A, a return air valve B, a return air valve C, and a return air valve D.

[0025] like Figure 2As shown, one end of the main cooling pipe 5 is equipped with a cold air inlet, and a cooling fan 11 is mounted on the main cooling pipe 5. The main cooling pipe 5 is connected to four cooling branch pipes 12, which are connected one-to-one with four heat storage chambers 7. Each cooling branch pipe 12 is equipped with a cooling valve 20. The main cooling pipe 5 is used to introduce cold air, which is then transported to the heat storage chambers 7 through the cooling branch pipes 12. The heat storage chambers 7 achieve the cooling function through a mixed circulation of hot and cold gases. The four main cooling pipes 5 are designated as main cooling pipe A, main cooling pipe B, main cooling pipe C, and main cooling pipe D. Main cooling pipe A is connected to heat storage chamber A, main cooling pipe B is connected to heat storage chamber B, main cooling pipe C is connected to heat storage chamber C, and main cooling pipe D is connected to heat storage chamber D. Main cooling pipe A is equipped with a cooling valve A, main cooling pipe B with a cooling valve B, main cooling pipe C with a cooling valve C, and main cooling pipe D with a cooling valve D.

[0026] This invention solves the self-cleaning problem of heat storage materials by designing the reverse combustion main pipe 5 and using one of the regenerator chambers 7 as the reverse combustion chamber. Moreover, the four-tower regenerator oxidation furnace can achieve compliant emissions during the reverse combustion process. That is, when the reverse combustion process is carried out in one regenerator chamber 7, the other three towers switch to a three-tower operation mode. The emission data of the three-tower operation mode fully meets the existing environmental emission standards. In this way, the reverse combustion process can be realized while meeting the environmental emission requirements.

[0027] The operating cycle mode of the four-tower regenerative oxidizer of this utility model is as follows:

[0028] Mode 1: Exhaust gas enters from heat storage chamber A, exits from heat storage chamber B, is purged from heat storage chamber C, and is reverse-burned from heat storage chamber D.

[0029] With the intake lift valve A, exhaust lift valve B, return air valve C, and backfire valve D opened, the VOC gas to be treated is drawn in by the intake fan 9 through the exhaust inlet 8 and enters the bottom of the heat storage chamber A through the intake branch pipe A. At this time, the intake lift valve A below the heat storage chamber A opens, and the VOC gas passes through the heat storage material (ceramic brick) from the bottom into the combustion chamber 6 above the heat storage chamber A. Under the action of the burner, the combustion chamber 6 forms a high-temperature chamber, and the exhaust gas undergoes a high-temperature oxidation decomposition reaction under suitable conditions (temperature, turbulence, and residence time) to produce carbon dioxide and water. At this time, the exhaust lift valve B below the heat storage chamber B opens, and the clean gas after the reaction in the combustion chamber 6 is discharged through the exhaust branch pipe B below the heat storage chamber B and the exhaust main pipe 3, and then through the chimney 16.

[0030] At this time, the heat storage chamber C undergoes return air purification. The return air valve C is opened, and the gas that was not fully burned in the combustion chamber 6 is sent back to the exhaust gas inlet 8 through the purge branch pipe 10C and the purge main pipe 4. The gas that was not fully burned is then transported back to the combustion chamber 6 for further purification through the intake main pipe 2, thereby improving the purification efficiency.

[0031] The online back-burning process aims to remove deposits on the surface of the low-temperature zone of the heat storage material through decomposition. Decomposition requires raising the temperature of this area to 350 degrees Celsius and maintaining this temperature for a certain period. In Mode 1, when online back-burning is required, it occurs in heat storage chamber D. The process is as follows: the return air valve C (acting as a hot air circulation valve at this time) is opened, cooperating with the operating intake fan 9 to move the high-temperature gas from combustion chamber 6 down to the bottom of heat storage chamber D. Simultaneously, the back-burning cooling fan 11 is turned on, and the back-burning valve D is opened, sending cooling air into the bottom of heat storage chamber D. Through the mixing of hot and cold gases, the gas circulation temperature at the bottom of heat storage chamber D is controlled, achieving the back-burning cleaning function. In the case of online back-burning, heat storage chambers A, B, and C can treat VOC gases according to the normal three-tower mode, meeting emission requirements.

[0032] Mode 2: Exhaust gas enters from heat storage chamber B, exits from heat storage chamber C, is purged from heat storage chamber D, and is reverse-burned from heat storage chamber A.

[0033] With the intake lift valve B, exhaust lift valve C, return air valve D, and backfire valve A opened, the VOC gas to be treated is drawn in by the intake fan 9 through the exhaust inlet 8 and enters the bottom of the regenerator chamber B through the intake branch pipe B. At this time, the intake lift valve B below the regenerator chamber B opens, and the VOC gas passes through the heat storage material (ceramic brick) from the bottom into the combustion chamber 6 above the regenerator chamber B. Under the action of the burner, the combustion chamber 6 forms a high-temperature chamber, and the exhaust gas undergoes a high-temperature oxidation decomposition reaction under suitable conditions (temperature, turbulence, and residence time) to produce carbon dioxide and water. At this time, the exhaust lift valve C below the regenerator chamber C opens, and the clean gas after the reaction in the combustion chamber 6 is discharged through the exhaust branch pipe C below the regenerator chamber C and the exhaust main pipe 3, and then through the chimney 16.

[0034] At this time, the heat storage chamber D undergoes return air purification. The return air valve D is opened, and the gas that was not fully burned in the combustion chamber 6 is sent back to the exhaust gas inlet 8 through the purge branch pipe 10D and the purge main pipe 4. The gas that was not fully burned is then transported back to the combustion chamber 6 for further purification through the intake main pipe 2, thereby improving the purification efficiency.

[0035] In this mode, when online back-burning is required, back-burning occurs in regenerator A. The process is as follows: the return air valve D (which functions as a hot air circulation valve at this time) is opened, cooperating with the running intake fan 9 to move the high-temperature gas from combustion chamber 6 down to the bottom of regenerator A. Simultaneously, the back-burning cooling fan 11 is turned on, and the back-burning valve A is opened, sending cooling air into the bottom of regenerator A. Through the mixing of hot and cold gases, the gas circulation temperature at the bottom of regenerator A is controlled, achieving the back-burning cleaning function. In the case of online back-burning, regenerators B, C, and D can treat VOC gases according to the normal three-tower mode, meeting emission requirements.

[0036] Mode 3: Exhaust gas enters from heat storage chamber C, exits from heat storage chamber D, heat storage chamber A is purged, and heat storage chamber B is reverse-burned.

[0037] With the intake lift valve C, exhaust lift valve D, return air valve A, and backfire valve B opened, the VOC gas to be treated is drawn in by the intake fan 9 through the exhaust inlet 8 and enters the bottom of the heat storage chamber C through the intake branch pipe C. At this time, the intake lift valve C below the heat storage chamber C opens, and the VOC gas passes through the heat storage material (ceramic brick) from the bottom into the combustion chamber 6 above the heat storage chamber C. Under the action of the burner, the combustion chamber 6 forms a high-temperature chamber, and the exhaust gas undergoes a high-temperature oxidation decomposition reaction under suitable conditions (temperature, turbulence, and residence time) to produce carbon dioxide and water. At this time, the exhaust lift valve D below the heat storage chamber D opens, and the clean gas after the reaction in the combustion chamber 6 is discharged through the exhaust branch pipe D below the heat storage chamber D and the exhaust main pipe 3, and then through the chimney 16.

[0038] At this time, the heat storage chamber A undergoes return air purification. The return air valve A is opened, and the gas that was not fully burned in the combustion chamber 6 is sent back to the exhaust gas inlet 8 through the purge branch pipe 10A and the purge main pipe 4. The gas that was not fully burned is then transported back to the combustion chamber 6 for further purification through the intake main pipe 2, thereby improving the purification efficiency.

[0039] In this mode, when online back-burning is required, back-burning occurs in regenerator B. The process is as follows: Return air valve A is opened (acting as a hot air circulation valve at this time), cooperating with the running intake fan 9 to move the high-temperature gas from combustion chamber 6 to the bottom of regenerator B. Simultaneously, back-burning cooling fan 11 is turned on, and back-burning valve B is opened, sending cooling air into the bottom of regenerator B. Through the mixing of hot and cold gases, the gas circulation temperature at the bottom of regenerator B is controlled, achieving the back-burning cleaning function. In the case of online back-burning, regenerators A, C, and D can treat VOC gases according to the normal three-tower mode, meeting emission requirements.

[0040] Mode 4: Exhaust gas enters from heat storage chamber D, exits from heat storage chamber A, is purged from heat storage chamber B, and is reverse-burned from heat storage chamber C.

[0041] With the intake lift valve D, exhaust lift valve A, return air valve B, and backfire valve C opened, the VOC gas to be treated is drawn in by the intake fan 9 through the exhaust inlet 8 and enters the bottom of the regenerator chamber D through the intake branch pipe D. At this time, the intake lift valve D below the regenerator chamber D opens, and the VOC gas passes through the heat storage material (ceramic brick) from the bottom into the combustion chamber 6 above the regenerator chamber D. Under the action of the burner, the combustion chamber 6 forms a high-temperature chamber, where the exhaust gas undergoes a high-temperature oxidation decomposition reaction under suitable conditions (temperature, turbulence, and residence time) to produce carbon dioxide and water. At this time, the exhaust lift valve A below the regenerator chamber A opens, and the clean gas after the reaction in the combustion chamber 6 is discharged through the exhaust branch pipe A and the exhaust main pipe 3 below the regenerator chamber A and then through the chimney 16.

[0042] At this time, the heat storage chamber B undergoes return air purification. The return air valve B is opened, and the gas that was not fully burned in the combustion chamber 6 is sent back to the exhaust gas inlet 8 through the purge branch pipe 10B and the purge main pipe 4. The gas that was not fully burned is then transported back to the combustion chamber 6 for further purification through the intake main pipe 2, thereby improving the purification efficiency.

[0043] In this mode, when online back-burning is required, back-burning occurs in regenerator C. The process is as follows: The return air valve B (acting as a hot air circulation valve at this time) is opened, cooperating with the running intake fan 9 to move the high-temperature gas from combustion chamber 6 to the bottom of regenerator C. Simultaneously, the back-burning cooling fan 11 is turned on, and the back-burning valve C is opened, sending cooling air into the bottom of regenerator C. Through the mixing of hot and cold gases, the gas circulation temperature at the bottom of regenerator C is controlled, achieving the back-burning cleaning function. In the case of online back-burning, regenerators A, B, and D can treat VOC gases according to the normal three-tower mode, meeting emission requirements.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] 1. By designing the reverse combustion main pipe 5, one of the heat storage chambers 7 is used as the reverse combustion chamber. The heat stored in the heat storage chamber 7 is used to heat up the low-temperature zone of the heat storage material in the lower part of the heat storage chamber 7 through the reverse combustion process. The originally deposited viscous substances are heated and vaporized. The low-temperature zone of these heat storage materials is cleaned. The gas phase passes through the purge branch pipe 10, purge main pipe 4, intake main pipe 2, intake branch pipe and heat storage chamber 7 in sequence and then returns to the combustion chamber 6 for secondary incineration treatment, which meets the environmental protection emission standards of the reverse combustion process.

[0046] 2. The four-tower design increases the volume of combustion chamber 6 and extends the residence time of exhaust gas in combustion chamber 6, thereby improving the conversion efficiency of exhaust gas incineration.

[0047] 3. It will not increase the user's energy consumption or add extra energy costs to the user's usage.

[0048] In this description of the utility model, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. They can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model. Furthermore, the specific features and structures described in the embodiments are included in at least one implementation method. Those skilled in the art can combine features from different implementation methods without contradiction. The scope of protection of this utility model is not limited to the specific implementation methods described above. Based on the basic technical concept of this utility model, implementation methods that can be conceived by those skilled in the art without creative effort are all within the scope of protection of this utility model.

Claims

1. A four-tower regenerative oxidizer characterized by, The furnace includes a furnace body (1), an intake pipe (2), an exhaust pipe (3), a purging pipe (4), and a backfire pipe (5). The furnace body (1) contains a combustion chamber (6) and four heat storage chambers (7). The four heat storage chambers (7) are spaced apart and are all connected to the combustion chamber (6). One end of the intake pipe (2) is provided with an exhaust gas inlet (8). An intake fan (9) is provided on the intake pipe (2). The intake pipe (2) is connected to four intake branch pipes, which are connected to the four heat storage chambers (7) one by one. One end of the exhaust pipe (3) is provided with an exhaust gas outlet. The exhaust pipe (3) is connected to four exhaust branch pipes, which are connected to the four heat storage chambers (7) one by one. One end of the purging pipe (4) is connected to the exhaust gas inlet (8). The purging pipe (4) is connected to four exhaust branch pipes. There are four purge branch pipes (10), which are connected to four heat storage chambers (7) one by one. The purge branch pipes (10) are used to transport the gas from the combustion chamber (6) to the purge main pipe (4) through one of the heat storage chambers (7), and then use the intake main pipe (2) to transport the gas to the other heat storage chambers (7), so that the gas that has not been fully burned is sent back to the combustion chamber (6) for combustion again. One end of the back-burning main pipe (5) is provided with a cold air inlet. The back-burning main pipe (5) is provided with a back-burning cooling fan (11). The back-burning main pipe (5) is connected to four back-burning branch pipes (12), which are connected to four heat storage chambers (7) one by one. The back-burning main pipe (5) is used to introduce cold air and transport it to the heat storage chamber (7) through the back-burning branch pipes (12). The heat storage chamber (7) realizes the back-burning function through the mixing and circulation of hot and cold gas.

2. The four-tower regenerative oxidizer of claim 1, wherein, The inner walls of the combustion chamber (6) and the heat storage chamber (7) are both provided with a heat insulation layer (13).

3. The four-tower regenerative oxidizer of claim 1, wherein, The combustion chamber (6) is provided with a flame observation port (14), and the heat storage chamber (7) is provided with an inspection door (15).

4. The four-tower regenerative oxidizer of claim 1, wherein, The exhaust outlet is connected to a chimney (16).

5. The four-tower regenerative oxidizer of claim 1, wherein, An intake booster valve (17) is provided on the intake branch pipe.

6. The four-tower regenerative oxidizer of claim 1, wherein, An exhaust booster valve (18) is provided on the exhaust branch pipe.

7. The four-tower regenerative oxidizer of claim 1, wherein, The purge branch pipe (10) is equipped with a return air valve (19).

8. The four-tower regenerative oxidizer of claim 1, wherein, The back-burning branch pipe (12) is equipped with a back-burning valve (20).

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