Low-energy-consumption RTO system

Abstract

The utility model discloses a low-energy-consumption RTO system which comprises an RTO equipment body, a gas inlet pipeline unit, a gas exhaust pipeline unit, a natural gas pipeline unit and a heat bypass pipeline unit. The system further comprises a purging pipeline unit and a combustion-supporting pipeline unit. A pipeline of an existing system is modified, two strands of treated clean flue gas are led out from the RTO outlet waste gas header pipe, and one strand of clean flue gas is connected into an inlet of the combustion-supporting fan to serve as combustion-supporting air to be used by a combustion engine; and the other strand of clean flue gas is introduced into an inlet of the blowing fan and is used as blowing air. In the running process of the system, clean flue gas treated by the RTO hearth is utilized as combustion-supporting air and blowing air which need to be supplemented, and new air does not need to be additionally introduced. The problem that the oxygen content of flue gas at an outlet of the RTO device is higher than that at an inlet of the device can be solved, meanwhile, the temperature of the clean flue gas is higher than that of normal-temperature air, the clean flue gas has certain pressure, the consumption of natural gas and pressure head selection of a fan can be reduced, and power consumption is saved.

Description

Technical Field

[0001] The utility model relates to the field of RTO systems, in particular to a low-energy consumption RTO system. Background Art

[0002] The regenerative thermal oxidizer is referred to as RTO. It uses thermal oxidation method. The volatile organic matter in the exhaust gas undergoes oxidation reaction with oxygen in the air in the high temperature environment (above 760℃) of the oxidation furnace to produce harmless water and carbon dioxide which are discharged into the atmosphere.

[0003] Most of the existing thermal storage oxidation equipment (three-bed RTO) uses natural gas as the fuel for the RTO burner, and the burner needs to be supplemented with combustion-supporting air for combustion; the three-bed RTO also needs to use fresh air to purge the heat storage chamber. In both cases, some additional fresh air is added, which may dilute the exhaust gas on the one hand, and on the other hand, if the selection or adjustment is improper, more fresh air is introduced, which may cause the oxygen content of the flue gas at the outlet of the RTO device to be higher than the oxygen content at the inlet of the device, so that the VOCs emission concentration needs to be converted to a 3% baseline oxygen content, resulting in excessive emissions.

[0004] As Figure 1 As shown in the figure, during the design and operation of conventional RTO, the combustion air of the burner and the purge air of the heat storage bed layer use fresh air, which is an additional air volume in addition to the RTO design air volume. There is a problem of exhaust gas dilution. If the selection or adjustment is improper, more fresh air is introduced, which may cause the oxygen content of the flue gas at the outlet of the RTO device to be higher than the oxygen content at the inlet of the device, and the exhaust gas needs to be converted to a 3% benchmark oxygen content. As a result, the conversion value is very high and does not meet the relevant emission requirements. Utility Model Content

[0005] Purpose of the utility model: In order to solve the problems of the prior art, the utility model provides a low-energy consumption RTO system. During the normal operation of the RTO, no additional air needs to be added, which can not only reduce the energy consumption of the system, but also solve the problem of converting the oxygen content of exhaust gas emissions.

[0006] Technical solution: The low-energy consumption RTO system described in the utility model includes an RTO equipment body, an air intake pipeline unit, an exhaust pipeline unit, a natural gas pipeline unit and a thermal bypass pipeline unit; it also includes a purge pipeline unit and a combustion-supporting pipeline unit;

[0007] The RTO equipment body includes a combustion chamber and a plurality of heat storage chambers;

[0008] The air intake pipeline unit is connected to a plurality of heat storage chambers through a plurality of air intake branch pipelines;

[0009] The exhaust pipeline unit includes a plurality of exhaust branch pipelines connected from the heat storage chamber to the mixing box; the rear end of the mixing box is connected to the chimney;

[0010] The natural gas pipeline unit includes a burner disposed above the combustion chamber to provide natural gas supply to the combustion chamber;

[0011] The heat bypass unit is connected to the mixing box from the side of the combustion chamber;

[0012] The purge pipeline unit is connected between the mixing box and the plurality of heat storage chambers, and includes a purge fan and a plurality of purge branch pipelines respectively connected to each heat storage chamber;

[0013] The combustion-supporting pipeline unit includes a combustion-supporting fan connected between the mixing box and the burner.

[0014] Furthermore, the RTO body includes a combustion chamber, and a first heat storage chamber, a second heat storage chamber and a third heat storage chamber are connected in parallel below the combustion chamber; the upper parts of the three heat storage chambers are filled with first heat storage chamber heat storage ceramics, second heat storage chamber heat storage ceramics and third heat storage chamber heat storage ceramics respectively; the combustion chamber is flange-connected to the three heat storage chambers.

[0015] Furthermore, the air intake pipeline unit includes a system fan, an inlet main pipeline, an outlet main pipeline, and a first inlet branch pipeline, a second inlet branch pipeline, and a third inlet branch pipeline respectively connected to the three heat storage chambers. The exhaust gas enters the system fan through the inlet main pipeline, and the system fan is connected to the three inlet branch pipelines through the outlet main pipeline and enters the three heat storage chambers respectively; each of the inlet branch pipelines is also correspondingly provided with a first heat storage chamber inlet switching valve, a second heat storage chamber inlet switching valve, and a third heat storage chamber inlet switching valve;

[0016] Furthermore, a fresh air bypass is provided on the inlet main line 1; a VOCs waste gas cut-off valve is provided at the front end of the inlet of the fresh air bypass; and a fresh air regulating valve is provided on the fresh air bypass.

[0017] Furthermore, the exhaust pipeline unit includes an outlet exhaust main pipe connected to the inlet of the mixing box, a first exhaust branch pipe, a second exhaust branch pipe and a third exhaust branch pipe respectively connected from the three heat storage chambers to the outlet exhaust main pipe, and also includes an outlet exhaust main pipe connected from the mixing box outlet to the chimney; each exhaust branch pipe is also correspondingly provided with a first heat storage chamber outlet switching valve, a second heat storage chamber outlet switching valve and a third heat storage chamber outlet switching valve.

[0018] Furthermore, the natural gas pipeline unit includes a burner, a natural gas intake main pipe, a burner main fire pipeline, and a burner ignition pipeline arranged above the combustion chamber; the natural gas enters from the natural gas intake main pipe, is connected with the burner main fire pipeline and the burner ignition pipeline through a three-way flange, and the natural gas is input into the burner to generate a flame in the combustion chamber.

[0019] Furthermore, the thermal bypass unit is connected to the mixing box through a thermal bypass pipeline from the side of the combustion chamber; a thermal bypass regulating valve is also provided on the thermal bypass pipeline.

[0020] Furthermore, the purge pipeline unit is connected between the mixing box and the three heat storage chambers, including a purge fan and a first purge branch pipeline, a second purge branch pipeline, and a third purge branch pipeline respectively connected to each heat storage chamber; each purge branch pipeline is also correspondingly provided with a first heat storage chamber purge valve, a second heat storage chamber purge valve, and a third heat storage chamber purge valve; the mixing box is connected to the purge fan through a purge fan inlet pipeline, and then connected to the three purge branch pipelines through a purge fan outlet pipeline; a purge air regulating valve is also provided on the purge fan inlet pipeline.

[0021] Furthermore, the combustion-supporting pipeline unit includes a combustion-supporting fan connected between a mixing box and a burner; the mixing box is connected to the combustion-supporting fan through a combustion-supporting fan inlet pipeline, and then connected to the burner through a combustion-supporting fan outlet pipeline; a combustion-supporting air regulating valve is also provided on the combustion-supporting fan inlet pipeline.

[0022] The working principle of the low-energy RTO system of the utility model is as follows: the intake air is heated by the heat storage ceramic, and the burner is used to heat the intake air to the set temperature for oxidation and decomposition. When discharged, the heat storage ceramic absorbs most of the heat, and the airflow direction is switched regularly by the airflow switching valve, so as to cycle the heat absorption and heat release process of the heat storage ceramic. The high-temperature gas generated by oxidation flows through the special ceramic heat storage body, so that the ceramic body is heated up and "heat is stored". This "heat storage" is used to preheat the organic waste gas that enters later, thereby saving the fuel consumption for heating the waste gas. The ceramic heat storage body is divided into more than one area or chamber. Each heat storage chamber undergoes the procedures of heat storage-heat release-purge in turn, and works continuously over and over again. During the operation of the conventional system, the combustion-supporting fan introduces fresh air at room temperature and natural gas to form a flame in the burner to maintain the set temperature of the combustion chamber; the purge fan introduces fresh air at room temperature and injects it into each heat storage chamber. After the intake stage of the heat storage chamber is completed, the next stage introduces fresh air at room temperature to clean the heat storage chamber to ensure the high removal efficiency of the RTO equipment.

[0023] Beneficial effects: Compared with the prior art, the utility model has the following advantages: (1) The pipelines of the existing system are modified to lead out two streams of treated clean flue gas on the mixing box. One stream of clean flue gas is connected to the inlet of the combustion-supporting fan and used as combustion-supporting air for the burner; the other stream of clean flue gas is connected to the inlet of the purge fan and used as purge air. The combustion-supporting air and purge air required to be supplemented during the operation of the system utilize the clean flue gas treated by the RTO furnace, and there is no need to introduce new air. This can avoid the problem that the oxygen content of the flue gas at the outlet of the RTO device is higher than the oxygen content at the inlet of the device. At the same time, the temperature of the clean flue gas is higher than that of the air at normal temperature and has a certain pressure, which can reduce the use of natural gas and the pressure head selection of the fan, saving electricity consumption. (2) Since the clean exhaust gas at the RTO outlet is waste gas that has been oxidized at high temperature, the VOCs in the waste gas have been removed by 99% or more, and the temperature is higher than that of normal temperature air. The flue gas can be used as combustion-supporting air. Because the flue gas temperature is higher than that of normal temperature air, assuming that the combustion chamber is set at 800°C, the temperature difference of the combustion-supporting air to reach this set temperature can be reduced, saving the consumption of natural gas; and the gas discharged from the system is recycled, avoiding the problem of additional air supplement. (3) As above, when the clean flue gas is used as purge air, its temperature is higher than that of normal temperature air. Assuming that the combustion chamber is set at 800°C, the temperature difference of the purge air to reach this set temperature can be reduced, saving the consumption of natural gas; and the gas discharged from the system is recycled, avoiding the problem of additional air supplement. (4) The conventional RTO system is a positive pressure system. There is still a certain pressure when the clean flue gas is discharged at the RTO outlet. In this way, the combustion-supporting fan and the purge fan can use this part of the pressure when selecting the pressure head, which can save the pressure head selection of the fan, reduce the power of the fan, and thus save electricity consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the RTO system before transformation in the background technology;

[0025] Figure 2 It is a structural schematic diagram of the low energy consumption RTO system of the utility model. DETAILED DESCRIPTION

[0026] Embodiment 1:

[0027] like Figure 2 As shown, a low-energy consumption RTO system described in the utility model includes an RTO device body 33, an air intake pipeline unit, an exhaust pipeline unit, a natural gas pipeline unit and a thermal bypass pipeline unit; and also includes a purge pipeline unit and a combustion-supporting pipeline unit;

[0028] The RTO equipment body 33 includes a combustion chamber 32, and the first regenerator 26, the second regenerator 27 and the third regenerator 28 are connected in parallel below the combustion chamber 32; the upper parts of the three regenerators are filled with the first regenerator thermal storage ceramic 29, the second regenerator thermal storage ceramic 30 and the third regenerator thermal storage ceramic 31 respectively; the combustion chamber 32 is flange-connected with the three regenerators;

[0029] The air intake pipeline unit includes a system fan 22, an inlet main pipeline 1, an outlet main pipeline 2, and a first air intake branch pipeline 3, a second air intake branch pipeline 4, and a third air intake branch pipeline 5 respectively connected to three heat storage chambers. The exhaust gas enters the system fan 22 through the inlet main pipeline 1, and the system fan 22 is connected to the three air intake branch pipelines through the outlet main pipeline 2 and enters the three heat storage chambers respectively; the pipeline, the fan, and the heat storage chamber are connected by flanges; each air intake branch pipeline is also correspondingly provided with a first heat storage chamber inlet switching valve 36, a second heat storage chamber inlet switching valve 37, and a third heat storage chamber inlet switching valve 38.

[0030] In addition, a fresh air bypass 50 is provided on the inlet main line 1; and a VOCs waste gas cut-off valve 48 is provided at the front end of the inlet of the fresh air bypass 50; and a fresh air regulating valve 49 is provided on the fresh air bypass 50. When the conventional RTO is started, the VOCs waste gas cut-off valve 48 is closed, the fresh air regulating valve 49 is opened, and fresh air is introduced from the fresh air bypass 50 through the system fan 22 to the combustion chamber 32 for combustion. After the combustion chamber reaches the set temperature and the RTO is ready to process the waste gas, the VOCs waste gas cut-off valve 48 is opened, the fresh air regulating valve 49 is closed, and the waste gas is introduced into the RTO system for processing.

[0031] The exhaust pipeline unit includes an outlet exhaust main pipe 9 connected to the inlet of the mixing box 34, a first exhaust branch pipe 6, a second exhaust branch pipe 7 and a third exhaust branch pipe 8 respectively connected from three heat storage chambers to the outlet exhaust main pipe 9, and also includes an outlet exhaust main pipe 10 connected from the outlet of the mixing box 34 to the chimney 35; flange connections are adopted between the pipes and between the mixing box 34 and the chimney 35; each exhaust branch pipe is also provided with a first heat storage chamber outlet switching valve 39, a second heat storage chamber outlet switching valve 40 and a third heat storage chamber outlet switching valve 41.

[0032] The natural gas pipeline unit provides natural gas supply to the combustion chamber 32, including a burner 25, a natural gas intake main pipe 19, a burner main fire pipeline 20, and a burner ignition pipeline 21 arranged above the combustion chamber 32; the natural gas enters from the natural gas intake main pipe 19, is connected to the burner main fire pipeline 20 and the burner ignition pipeline 21 through a three-way flange, and the natural gas is input into the burner 25 to generate a flame in the combustion chamber 32.

[0033] The combustion-supporting pipeline unit includes a combustion-supporting fan 24 connected between a mixing box 34 and a burner 25. The mixing box 34 is connected to the combustion-supporting fan 24 through a combustion-supporting fan inlet pipeline 12, and then connected to the burner 25 through a combustion-supporting fan outlet pipeline 13; a combustion-supporting air regulating valve 46 is also provided on the combustion-supporting fan inlet pipeline 12.

[0034] The thermal bypass unit is connected to the mixing box 34 from the side of the combustion chamber 32 through a thermal bypass pipeline 11; a thermal bypass regulating valve 45 is also provided on the thermal bypass pipeline 11.

[0035] The purge pipeline unit is connected between the mixing box 34 and multiple heat storage chambers, including a purge fan 23 and a first purge branch pipeline 16, a second purge branch pipeline 17, and a third purge branch pipeline 18 respectively connected to each heat storage chamber; each purge branch pipeline is also provided with a first heat storage chamber purge valve 42, a second heat storage chamber purge valve 43, and a third heat storage chamber purge valve 44; the mixing box 34 is connected to the purge fan 23 through the purge fan inlet pipeline 14, and then connected to the three purge branch pipelines through the purge fan outlet pipeline 15, and flange connections are adopted between the pipelines and between other components; a purge air regulating valve 47 is also provided on the purge fan inlet pipeline 14.

[0036] The operation process of the above RTO system is as follows:

[0037] RTO startup phase: When a conventional RTO is started, the VOCs waste gas shut-off valve 48 is closed, the fresh air regulating valve 49 is opened, and fresh air is introduced from the fresh air bypass 50 through the system fan 22 into the combustion chamber 32 for combustion. When the combustion chamber reaches the set temperature and the RTO is ready to treat the waste gas, the VOCs waste gas shut-off valve 48 is opened, the fresh air regulating valve 49 is closed, and the waste gas is introduced into the RTO system for treatment. At this time, the second heat storage chamber heat storage ceramic 30 of the second heat storage chamber 27 is already in a heat storage state, and the combustion chamber 32 has reached the set temperature.

[0038] Phase 1: The second regenerator 27 takes in air, the third regenerator 28 exhausts air, and the first regenerator 26 is purged. The exhaust gas passes through the system fan inlet pipe 1 and then through the system fan 22 for pressurization before passing through the system fan outlet pipe 2 to enter the second regenerator 27. At this time, the second regenerator inlet switching valve 37 is opened, the third regenerator outlet switching valve 41 is opened, and the remaining first regenerator inlet switching valve 36, the first regenerator outlet switching valve 39, the second regenerator outlet switching valve 40, and the third regenerator inlet switching valve 38 are closed. The first regenerator purge valve 42 is opened, and the second regenerator purge valve 43 and the third regenerator purge valve 44 are closed. The exhaust gas first passes through the second regenerator heat storage ceramic 30 of the second regenerator 27 for preheating and then enters the combustion chamber 32 for oxidation. At this time, the combustion-supporting fan 24 introduces the purified high-temperature flue gas into the burner 25 from the RTO outlet through the combustion-supporting air regulating valve 46 to maintain flame combustion, thereby ensuring that the temperature of the combustion chamber 32 is maintained at the set temperature. The purge fan 23 introduces the purified high-temperature flue gas into the first regenerator 26 from the RTO outlet through the purge air regulating valve 47 for purge, thereby ensuring the purification efficiency of the RTO equipment.

[0039] Stage 2: The third heat storage chamber 28 takes in air, the first heat storage chamber 26 exhausts air, and the second heat storage chamber 27 is purged. The exhaust gas passes through the system fan inlet pipe 1 and then through the system fan 22 for pressurization, and then passes through the system fan outlet pipe 2 to enter the third heat storage chamber 28. At this time, the third heat storage chamber inlet switching valve 38 is opened, the first heat storage chamber outlet switching valve 39 is opened, and the remaining first heat storage chamber inlet switching valve 36, the third heat storage chamber outlet switching valve 41, the second heat storage chamber inlet switching valve 37, and the second heat storage chamber outlet switching valve 40 are closed. The first heat storage chamber purge valve 42 is closed, the second heat storage chamber purge valve 43 is opened, and the third heat storage chamber purge valve 44 is closed. The exhaust gas first passes through the third regenerator heat storage ceramic 31 of the third regenerator 28 for preheating and then enters the combustion chamber 32 for oxidation. At this time, the combustion-supporting fan 24 introduces the purified high-temperature flue gas into the burner 25 from the RTO outlet through the combustion-supporting air regulating valve 46 to maintain flame combustion, thereby ensuring that the temperature of the combustion chamber 32 is maintained at the set temperature. The purge fan 23 introduces the purified high-temperature flue gas into the second regenerator 27 from the RTO outlet through the purge air regulating valve 47 for purge, thereby ensuring the purification efficiency of the RTO equipment.

[0040] Stage 3: The first heat storage chamber 26 takes in air, the second heat storage chamber 27 discharges air, and the third heat storage chamber 28 is purged. The exhaust gas passes through the system fan inlet pipe 1 and then through the system fan 22 for pressurization, and then passes through the system fan outlet pipe 2 to enter the first heat storage chamber 26. At this time, the first heat storage chamber inlet switching valve 36 is opened, the second heat storage chamber outlet switching valve 40 is opened, and the remaining first heat storage chamber outlet switching valve 39, the second heat storage chamber inlet switching valve 37, the third heat storage chamber inlet switching valve 38, and the third heat storage chamber outlet switching valve 41 are closed. The first heat storage chamber purge valve 42 is closed, the second heat storage chamber purge valve 43 is closed, and the third heat storage chamber purge valve 44 is opened. The exhaust gas first passes through the first regenerator heat storage ceramic 29 of the first regenerator 26 for preheating and then enters the combustion chamber 32 for oxidation. At this time, the combustion-supporting fan 24 introduces the purified high-temperature flue gas into the burner 25 from the RTO outlet through the combustion-supporting air regulating valve 46 to maintain flame combustion, thereby ensuring that the temperature of the combustion chamber 32 is maintained at the set temperature. The purge fan 23 introduces the purified high-temperature flue gas into the third regenerator 28 from the RTO outlet through the purge air regulating valve 47 for purge, thereby ensuring the purification efficiency of the RTO equipment.

[0041] The above is a cycle of a three-bed RTO, and the switching time of the switching valve is about 60-180s; the combustion-supporting air and the purge air in all stages of the low-energy RTO system of the utility model are all quoted from the high-temperature flue gas purified by the RTO outlet.

[0042] During the operation of the utility model, since the clean flue gas at the RTO outlet is waste gas that has been oxidized at high temperature, the VOCs in the waste gas have been removed by 99% or more, and the temperature is higher than that of normal temperature air, the flue gas can be used as combustion-supporting air. Because the flue gas temperature is higher than that of normal temperature air, assuming that the combustion chamber is set at 800°C, the temperature difference of the combustion-supporting air to reach this set temperature can be reduced, saving the consumption of natural gas; and the gas discharged from the system is recycled, avoiding the problem of additional air supplement. Similarly, when the clean flue gas is used as purge air, the temperature is higher than that of normal temperature air. Assuming that the combustion chamber is set at 800°C, the temperature difference of the purge air to reach this set temperature can be reduced, saving the consumption of natural gas; and the gas discharged from the system is recycled, avoiding the problem of additional air supplement. Both the combustion-supporting air and the purge air use the clean flue gas discharged from the system, which can well avoid the problem that the oxygen content of the flue gas at the outlet of the RTO device is higher than the oxygen content at the inlet of the device, and the exhaust gas needs to be converted to a 3% benchmark oxygen content. In addition, the conventional RTO system is a positive pressure system. There is still a certain pressure when the clean flue gas is discharged at the RTO outlet. This part of the pressure can be used when selecting the pressure head of the combustion-supporting fan and the purge fan, which can save the pressure head selection of the fan, reduce the power of the fan, and thus save electricity consumption.

[0043] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A low-energy RTO system, comprising an RTO equipment body, an air intake pipeline unit, an exhaust pipeline unit, a natural gas pipeline unit and a thermal bypass pipeline unit; characterized in that It also includes a purge pipeline unit and a combustion-supporting pipeline unit; The RTO equipment body includes a combustion chamber and a plurality of heat storage chambers; The air intake pipeline unit is connected to a plurality of heat storage chambers through a plurality of air intake branch pipelines; The exhaust pipeline unit includes a plurality of exhaust branch pipelines connected from the heat storage chamber to the mixing box; the rear end of the mixing box is connected to the chimney; The natural gas pipeline unit includes a burner disposed above the combustion chamber to provide natural gas supply to the combustion chamber; The heat bypass pipeline unit is connected to the mixing box from the side of the combustion chamber; The purge pipeline unit is connected between the mixing box and the plurality of heat storage chambers, and includes a purge fan and a plurality of purge branch pipelines respectively connected to each heat storage chamber; The combustion-supporting pipeline unit includes a combustion-supporting fan connected between the mixing box and the burner.

2. The low energy consumption RTO system according to claim 1, characterized in that: The RTO equipment body includes a combustion chamber, and a first heat storage chamber, a second heat storage chamber and a third heat storage chamber are connected in parallel below the combustion chamber; the upper parts of the three heat storage chambers are filled with first heat storage chamber heat storage ceramics, second heat storage chamber heat storage ceramics and third heat storage chamber heat storage ceramics respectively; the combustion chamber is flange-connected with the three heat storage chambers.

3. The low energy consumption RTO system according to claim 2, characterized in that: The air intake pipeline unit includes a system fan, an inlet main pipeline, an outlet main pipeline, and a first air intake branch pipeline, a second air intake branch pipeline, and a third air intake branch pipeline respectively connected to three heat storage chambers. The exhaust gas enters the system fan through the inlet main pipeline, and the system fan is connected to the three air intake branch pipelines through the outlet main pipeline and enters the three heat storage chambers respectively.

4. The low energy consumption RTO system according to claim 3, characterized in that: The inlet main line is also provided with a fresh air bypass; a VOCs waste gas cut-off valve is provided at the front end of the inlet of the fresh air bypass; and a fresh air regulating valve is provided on the fresh air bypass.

5. The low energy consumption RTO system according to claim 2, characterized in that: The exhaust pipeline unit includes an outlet exhaust main pipe connected to the inlet of the mixing box, a first exhaust branch pipe, a second exhaust branch pipe and a third exhaust branch pipe respectively connected from three heat storage chambers to the outlet exhaust main pipe, and also includes an outlet exhaust main pipe connected from the outlet of the mixing box to the chimney.

6. The low energy consumption RTO system according to claim 1, wherein the thermal bypass pipeline unit is characterized by: The natural gas pipeline unit includes a burner, a natural gas intake main pipe, a burner main fire pipeline, and a burner ignition pipeline arranged above the combustion chamber; the natural gas enters from the natural gas intake main pipe, is connected with the burner main fire pipeline and the burner ignition pipeline through a three-way flange, and the natural gas is input into the burner to generate a flame in the combustion chamber.

7. The low energy consumption RTO system according to claim 1, characterized in that: The thermal bypass pipeline unit is connected to the mixing box through a thermal bypass pipeline from the side of the combustion chamber; a thermal bypass regulating valve is also provided on the thermal bypass pipeline.

8. The low energy consumption RTO system according to claim 2, characterized in that: The purge pipeline unit is connected between the mixing box and the three heat storage chambers, and includes a purge fan and a first purge branch pipeline, a second purge branch pipeline, and a third purge branch pipeline respectively connected to each heat storage chamber; the mixing box is connected to the purge fan through a purge fan inlet pipeline, and then connected to the three purge branch pipelines through a purge fan outlet pipeline; a purge air regulating valve is also provided on the purge fan inlet pipeline.

9. The low energy consumption RTO system according to claim 1, characterized in that: The combustion-supporting pipeline unit includes a combustion-supporting fan connected between a mixing box and a burner; the mixing box is connected to the combustion-supporting fan through a combustion-supporting fan inlet pipeline, and then connected to the burner through a combustion-supporting fan outlet pipeline; a combustion-supporting air regulating valve is also provided on the combustion-supporting fan inlet pipeline.

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