Gas recuperation oxidation heating system and method

Abstract

The application provides a gas heat recovery and oxidation heat supply system and method, and belongs to the technical field of coal mine gas emission reduction and utilization. The system is a gas emission reduction and utilization system adopting heat recovery and oxidation technology and heat storage technology to oxidize coal mine extraction gas with a concentration of less than 3%, simultaneously recover and store gas oxidation heat, and meet the heat supply demand of coal mine production and life. The utilization rate of the heat recovery and oxidation device, the maximum heat supply capacity of the heat supply system, and the reliability of the heat supply system are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mine gas emission reduction and utilization, and specifically discloses a gas back-heat oxidation heat supply system and method. BACKGROUND

[0002] The coal mine gas back-heat oxidation heat supply system is a complete device for decomposing coal mine gas with a concentration of less than 3% into carbon dioxide and water through oxidation and recycling heat for coal mine heat supply by using back-heat oxidation technology. The heat source of the back-heat oxidation device is stable, while the heat load of the coal mine varies greatly with the seasonal and diurnal changes of air temperature. Therefore, the heat supply and demand are mismatched, and sometimes there is no place to use the heat, and sometimes the heat is not enough. SUMMARY

[0003] The present application provides a gas back-heat oxidation heat supply system and method to solve the problem of mismatch between heat supply and demand in the existing gas back-heat oxidation heat supply system.

[0004] The present application provides a gas back-heat oxidation heat supply system, which comprises a gas concentration adjustment unit, a blower, a back-heat oxidation device, a waste heat boiler, a boiler inlet control valve, a boiler outlet control valve, a water distributor, a second type heat supply terminal, a second type terminal inlet control valve, a second type terminal outlet control valve, a heat storage water tank, a heat storage inlet control valve, a heat storage outlet control valve, a back-heat circulating water pump, a heat release outlet control valve, a heat release inlet control valve, a heat release circulating water pump, a heat release terminal inlet control valve, and a heat release terminal outlet control valve. The gas concentration adjustment unit is provided with a gas inlet, an air inlet, and a gas outlet, the gas inlet is connected with a gas pipeline, and the air inlet is connected with the blower. The gas inlet of the back-heat oxidation device is connected with the gas outlet of the gas concentration adjustment unit, and the high-temperature flue gas outlet is connected with the gas inlet of the waste heat boiler. The water inlet and the water outlet of the waste heat boiler are respectively provided with the boiler inlet control valve and the boiler outlet control valve, the boiler inlet control valve is connected with the water outlet of the back-heat circulating water pump, and the boiler outlet control valve is connected with the water inlet of the water distributor. The second type heat supply terminal is provided with two groups of water inlets and water outlets, the two groups of water inlets are respectively provided with the second type terminal inlet control valve and the heat release terminal inlet control valve, the two groups of water outlets are respectively provided with the second type terminal outlet control valve and the heat release terminal outlet control valve, the second type terminal inlet control valve is connected with the water outlet of the water distributor, and the second type terminal outlet control valve is connected with the water inlet of the back-heat circulating water pump. The heat storage water tank is provided with two groups of water inlets and water outlets, the two groups of water inlets are respectively provided with the heat storage inlet control valve and the heat release inlet control valve, the two groups of water outlets are respectively provided with the heat storage outlet control valve and the heat release outlet control valve, the heat storage inlet control valve is connected with the water outlet of the water distributor, the heat storage outlet control valve is connected with the water inlet of the back-heat circulating water pump, the heat release outlet control valve is connected with the water inlet of the heat release circulating water pump, the water outlet of the heat release circulating water pump is connected with the heat release terminal inlet control valve, and the heat release terminal outlet control valve is connected with the heat release inlet control valve.

[0005] Further, the heat storage water tank capacity calculation formula is as follows:

[0006] V=947·E / (T C -T F )

[0007] Wherein: heat storage water tank capacity V, unit m 3 ; design heat storage E, unit MWh; heat storage temperature T C , unit ℃; heat release temperature T F , unit ℃.

[0008] Further, the heat storage temperature T C is in the range of 90-95℃, and the heat release temperature T F is in the range of 10-30℃.

[0009] Further, the above-mentioned gas regenerative oxidation heat supply system is configured with multiple sets of parallel heat storage water tanks.

[0010] Further, the above-mentioned gas regenerative oxidation heat supply system is configured with multiple sets of parallel second-type heat supply terminals.

[0011] Further, the above-mentioned gas regenerative oxidation heat supply system is configured with multiple sets of parallel regenerative oxidation devices and waste heat boilers.

[0012] Further, the above-mentioned gas regenerative oxidation heat supply system further comprises a first-type heat supply terminal and a first-type terminal inlet control valve; a first-type terminal inlet control valve is arranged on the water inlet of the first-type heat supply terminal, and the water outlet is connected with the water inlet of the regenerative circulating water pump; the first-type terminal inlet control valve is connected with the water outlet of the water distributor.

[0013] Further, the above-mentioned gas regenerative oxidation heat supply system is configured with multiple sets of parallel first-type heat supply terminals.

[0014] The present application provides a gas regenerative oxidation heat supply method, wherein when the above-mentioned gas regenerative oxidation heat supply system is normally running, low-concentration gas with a concentration of 3% or below enters the gas concentration adjustment unit from the gas inlet, is mixed with air sent by the air blower, and is adjusted to a preset concentration, enters the regenerative oxidation device, is oxidized and releases heat in the regenerative oxidation device, generates high-temperature flue gas, enters the waste heat boiler, and the high-temperature flue gas exchanges heat with low-temperature water in the waste heat boiler; high-temperature hot water enters the water distributor, the second-type terminal inlet control valve, the second-type terminal outlet control valve, the heat storage inlet control valve, the heat storage outlet control valve and the regenerative circulating water pump are opened, the heat release outlet control valve and the heat release inlet control valve are closed, the water distributor sends the high-temperature hot water to the second-type heat supply terminal and the heat storage water tank, and the heat storage water tank stores heat;

[0015] When the heat provided by the waste heat boiler is less than the demand of the second type of heat supply terminal, the heat storage inlet control valve and the heat storage outlet control valve are closed, the heat release outlet control valve, the heat release inlet control valve, the heat release circulating water pump, the heat release terminal inlet control valve and the heat release terminal outlet control valve are opened, and the waste heat boiler and the heat storage water tank jointly supply heat to the second type of heat supply terminal.

[0016] When the gas regenerative oxidation heat supply system is unstable, the regenerative oxidation device fails or the pipeline for supplying heat from the waste heat boiler to the second type of heat supply terminal fails, the second type of terminal inlet control valve, the second type of terminal outlet control valve, the heat storage inlet control valve, the heat storage outlet control valve and the regenerative circulating water pump are closed, the heat release outlet control valve, the heat release inlet control valve, the heat release circulating water pump, the heat release terminal inlet control valve and the heat release terminal outlet control valve are opened, and the heat storage water tank supplies heat to the second type of heat supply terminal.

[0017] The present application provides a gas regenerative oxidation heat supply method, wherein when the gas regenerative oxidation heat supply system is in normal operation, low-concentration gas with a concentration of 3% or less enters a gas concentration adjustment unit from a gas inlet, is mixed with air sent by a blower, and is adjusted to a preset concentration, enters a regenerative oxidation device, is oxidized in the regenerative oxidation device and releases heat, generates high-temperature flue gas, enters a waste heat boiler, and exchanges heat with low-temperature water in the waste heat boiler. High-temperature hot water enters a water distributor, the first type of terminal inlet control valve, the second type of terminal inlet control valve, the second type of terminal outlet control valve, the heat storage inlet control valve, the heat storage outlet control valve and the regenerative circulating water pump are opened, the heat release outlet control valve and the heat release inlet control valve are closed, and the water distributor sends the high-temperature hot water to the first type of heat supply terminal, the second type of heat supply terminal and the heat storage water tank, and the heat storage water tank stores heat.

[0018] When the heat provided by the waste heat boiler is less than the demand of the second type of heat supply terminal, the heat storage inlet control valve and the heat storage outlet control valve are closed, the heat release outlet control valve, the heat release inlet control valve, the heat release circulating water pump, the heat release terminal inlet control valve and the heat release terminal outlet control valve are opened, and the waste heat boiler and the heat storage water tank jointly supply heat to the second type of heat supply terminal.

[0019] When the gas regenerative oxidation heat supply system is unstable, the regenerative oxidation device fails or the pipeline for supplying heat from the waste heat boiler to the second type of heat supply terminal fails, the second type of terminal inlet control valve, the second type of terminal outlet control valve, the heat storage inlet control valve, the heat storage outlet control valve and the regenerative circulating water pump are closed, the heat release outlet control valve, the heat release inlet control valve, the heat release circulating water pump, the heat release terminal inlet control valve and the heat release terminal outlet control valve are opened, and the heat storage water tank supplies heat to the second type of heat supply terminal.

[0020] The present application has the following beneficial effects.

[0021] (1) The above system is a gas emission reduction and utilization system using regenerative oxidation technology and heat storage technology to oxidize coal mine gas with a concentration of less than 3%, while recovering and storing the heat generated by gas oxidation, to meet the heating needs of coal mine production and life.

[0022] (2) The utilization rate of the regenerative oxidation device of the heating system is improved. When the heat demand decreases and there is excess heat, the oxidation device still operates normally, and the excess heat is stored in the heat storage water tank. The utilization rate of the regenerative oxidation device, the core equipment of the heating system, is improved.

[0023] (3) The maximum heating capacity of the heating system is improved. When the heat demand increases and the heat generated is insufficient, the heat stored in the heat storage water tank begins to be released, and the oxidation device and the heat storage water tank supply heat at the same time, improving the maximum heating capacity of the heating system.

[0024] (4) The reliability of the heating system is improved. When the gas source of the oxidation device is unstable or the oxidation device fails for a short period of time, the heating system can still ensure stable heating, improving the reliability of the heating system. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0026] Figure 1 Process flow diagram of the gas regenerative oxidation heating system;

[0027] In the figure: 1-gas concentration adjustment unit; 2-blower; 3-regenerative oxidation device; 4-waste heat boiler; 5-boiler inlet control valve; 6-boiler outlet control valve; 7-water separator; 8-first heating terminal; 9-first terminal inlet control valve; 10-second heating terminal; 11-second terminal inlet control valve; 12-second terminal outlet control valve; 13-heat storage water tank; 14-heat storage inlet control valve; 15-heat storage outlet control valve; 16-regenerative circulating water pump; 17-heat release outlet control valve; 18-heat release inlet control valve; 19-heat release circulating water pump; 20-heat release terminal inlet control valve; 21-heat release terminal outlet control valve. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0029] Embodiment 1

[0030] The embodiment provides a gas regenerative oxidation heat supply system, which comprises a gas concentration adjusting unit 1, a blower 2, a regenerative oxidation device 3, a waste heat boiler 4, a boiler inlet control valve 5, a boiler outlet control valve 6, a water distributor 7, a second type heat supply terminal 10, a second type terminal inlet control valve 11, a second type terminal outlet control valve 12, a heat storage water tank 13, a heat storage inlet control valve 14, a heat storage outlet control valve 15, a regenerative circulating water pump 16, a heat release outlet control valve 17, a heat release inlet control valve 18, a heat release circulating water pump 19, a heat release terminal inlet control valve 20 and a heat release terminal outlet control valve 21. The gas concentration adjusting unit 1 is provided with a gas inlet, an air inlet and a gas outlet, the gas inlet is connected with a gas pipeline, and the air inlet is connected with the blower 2. The gas inlet of the regenerative oxidation device 3 is connected with the gas outlet of the gas concentration adjusting unit 1, and the high-temperature flue gas outlet is connected with the gas inlet of the waste heat boiler 4. The water inlets and outlets of the waste heat boiler 4 are respectively provided with the boiler inlet control valve 5 and the boiler outlet control valve 6, the boiler inlet control valve 5 is connected with the water outlet of the regenerative circulating water pump 16, and the boiler outlet control valve 6 is connected with the water inlet of the water distributor 7. The second type heat supply terminal 10 is provided with two groups of water inlets and outlets, the two groups of water inlets are respectively provided with the second type terminal inlet control valve 11 and the heat release terminal inlet control valve 20, the two groups of water outlets are respectively provided with the second type terminal outlet control valve 12 and the heat release terminal outlet control valve 21, the second type terminal inlet control valve 11 is connected with the water outlet of the water distributor 7, and the second type terminal outlet control valve 12 is connected with the water inlet of the regenerative circulating water pump 16. The heat storage water tank 13 is provided with two groups of water inlets and outlets, the two groups of water inlets are respectively provided with the heat storage inlet control valve 14 and the heat release inlet control valve 18, the two groups of water outlets are respectively provided with the heat storage outlet control valve 15 and the heat release outlet control valve 17, the heat storage inlet control valve 14 is connected with the water outlet of the water distributor 7, the heat storage outlet control valve 15 is connected with the water inlet of the regenerative circulating water pump 16, the heat release outlet control valve 17 is connected with the water inlet of the heat release circulating water pump 19, the water outlet of the heat release circulating water pump 19 is connected with the heat release terminal inlet control valve 20, and the heat release terminal outlet control valve 21 is connected with the heat release inlet control valve 18.

[0031] Further, the capacity calculation formula of the heat storage water tank 13 is as follows:

[0032] V = 947 · E / (T C -T F)

[0033] V, unit m 3 ; design heat storage E, unit MWh; heat storage temperature T C , unit ℃; heat release temperature T F , unit ℃.

[0034] Further, the heat storage temperature T C is in the range of 90-95℃, and the heat release temperature T F is in the range of 10-30℃.

[0035] Further, the above gas regenerative oxidation heating system is configured with multiple sets of parallel heat storage water tanks 13. When the set of heat storage water tank 13 is put into use and stores heat, the corresponding heat release outlet control valve 17 and heat release inlet control valve 18 are closed, and the corresponding heat storage inlet control valve 14 and heat storage outlet control valve 15 are opened; when the set of heat storage water tank 13 is put into use and releases heat, the corresponding heat storage inlet control valve 14 and heat storage outlet control valve 15 are closed, and the corresponding heat release outlet control valve 17 and heat release inlet control valve 18 are opened; when the set of heat storage water tank 13 is disabled, the corresponding heat storage inlet control valve 14, heat storage outlet control valve 15, heat release outlet control valve 17 and heat release inlet control valve 18 are closed. When the heat storage water tank 13 is put into use and stores heat, high-temperature hot water enters and mixes with cold water in the heat storage water tank 13, and then returns to the heat storage circulating water pump 16; after a period of operation, the water temperature in the heat storage water tank 13 is the same as that of the high-temperature hot water, and the heat storage reaches the upper limit, and the heat storage stops. When the heat storage water tank 13 is put into use and releases heat, the hot water in the heat storage water tank 13 is pressurized by the heat release circulating water pump 19 and enters the second type of heating terminal heat release 10, and then returns and mixes with the hot water in the heat storage water tank 13; after a period of operation, the water temperature in the heat storage water tank 13 is lower than 30℃ (for wellbore anti-freezing, the water temperature is lower than 10℃), and the heat release reaches the upper limit, and the heat release stops.

[0036] Further, the above gas heat recovery and oxidation heating system is configured with multiple sets of parallel second type heating terminal 10. When this set of second type heating terminal 10 is put into use and directly heated by the waste heat boiler 4, the corresponding heat release terminal inlet control valve 20 and heat release terminal outlet control valve 21 are closed, and the corresponding second type terminal inlet control valve 11 and second type terminal outlet control valve 12 are opened; when this set of second type heating terminal 10 is put into use and heated by the heat storage water tank 13, the corresponding second type terminal inlet control valve 11 and second type terminal outlet control valve 12 are closed, and the corresponding heat release terminal inlet control valve 20 and heat release terminal outlet control valve 21 are opened; when this set of second type heating terminal 10 is put into use and heated by the waste heat boiler 4 and the heat storage water tank 13, the corresponding second type terminal inlet control valve 11, second type terminal outlet control valve 12, heat release terminal inlet control valve 20 and heat release terminal outlet control valve 21 are opened; when this set of second type heating terminal 10 is not in use, the corresponding second type terminal inlet control valve 11, second type terminal outlet control valve 12, heat release terminal inlet control valve 20 and heat release terminal outlet control valve 21 are closed.

[0037] Further, the above gas heat recovery and oxidation heating system is configured with multiple sets of parallel heat recovery and oxidation device 3 and waste heat boiler 4. When this set of heat recovery and oxidation device 3 is put into use, the corresponding boiler inlet control valve 5 and boiler outlet control valve 6 are opened; otherwise, the corresponding boiler inlet control valve 5 and boiler outlet control valve 6 are closed.

[0038] Example 2

[0039] The embodiment provides a gas heat recovery and oxidation heating method. The gas heat recovery and oxidation heating system in Example 1 is in normal operation. Low-concentration gas with a concentration of 3% or less enters the gas concentration adjustment unit 1 from the gas inlet, is mixed with air sent by the air blower 2, and is adjusted to a preset concentration, enters the heat recovery and oxidation device 3, is oxidized and releases heat in the heat recovery and oxidation device 3, generates high-temperature flue gas at 800-850°C, enters the waste heat boiler 4, and exchanges heat with low-temperature water in the waste heat boiler 4, so that the temperature of the flue gas is reduced to 150°C or less, and then the flue gas is discharged into the atmosphere. High-temperature hot water enters the water distributor 7, the second type terminal inlet control valve 11, the second type terminal outlet control valve 12, the heat storage inlet control valve 14, the heat storage outlet control valve 15 and the heat recovery circulating water pump 16 are opened, the heat release outlet control valve 17 and the heat release inlet control valve 18 are closed, the water distributor 7 sends the high-temperature hot water to the second type heating terminal 10 and the heat storage water tank 13, the heat storage water tank 13 stores heat, and the low-temperature water returned from the second type heating terminal 10 and the heat storage water tank 13 is pressurized by the heat recovery circulating water pump 16 and enters the waste heat boiler 4 to become high-temperature hot water, forming a circulation;

[0040] When the heat provided by the waste heat boiler 4 is less than the demand of the second type of heat supply terminal 10, the heat storage inlet control valve 14 and the heat storage outlet control valve 15 are closed, and the heat release outlet control valve 17, the heat release inlet control valve 18, the heat release circulating water pump 19, the heat release terminal inlet control valve 20, and the heat release terminal outlet control valve 21 are opened, so that the waste heat boiler 4 and the heat storage water tank 13 jointly supply heat to the second type of heat supply terminal 10.

[0041] When the gas heat supply system is unstable, the heat recovery oxidation device 3 is faulty, or the pipeline for supplying heat from the waste heat boiler 4 to the second type of heat supply terminal 10 is faulty, the second type of terminal inlet control valve 11, the second type of terminal outlet control valve 12, the heat storage inlet control valve 14, the heat storage outlet control valve 15, and the heat recovery circulating water pump 16 are closed, and the heat release outlet control valve 17, the heat release inlet control valve 18, the heat release circulating water pump 19, the heat release terminal inlet control valve 20, and the heat release terminal outlet control valve 21 are opened, so that the heat storage water tank 13 supplies heat to the second type of heat supply terminal 10.

[0042] Embodiment 3

[0043] The embodiment provides a gas heat supply system, which is different from the embodiment 1 in that the gas heat supply system further comprises a first type of heat supply terminal 8 and a first type of terminal inlet control valve 9. The first type of terminal inlet control valve 9 is arranged on the water inlet of the first type of heat supply terminal 8, and the water outlet is connected with the water inlet of the heat recovery circulating water pump 16. The first type of terminal inlet control valve 9 is connected with the water outlet of the water distributor 7.

[0044] In the embodiment, the heat supply terminals of the gas heat supply system are divided into two types according to the heat supply characteristics: the first type of heat supply terminal 8 and the second type of heat supply terminal 10. The first type of heat supply terminal 8 is a heat load with little change in heat supply load, such as bath water preparation, coal slime drying, and heavy crystallization water treatment. The first type of heat supply terminal 8 is directly supplied with heat by the waste heat boiler 4. The second type of heat supply terminal 10 is a heat load with relatively large change in heat supply load, such as winter building heating and well shaft anti-freezing. The second type of heat supply terminal 10 can be directly supplied with heat by the waste heat boiler 4 or the heat storage water tank 13, and is automatically switched according to the heat supply and demand matching situation.

[0045] Further, the above-mentioned gas heat supply system is configured with multiple sets of parallel first type of heat supply terminals 8. When the set of first type of heat supply terminal 8 is put into use, the corresponding first type of terminal inlet control valve 9 is opened; otherwise, the corresponding first type of terminal inlet control valve 9 is closed.

[0046] Embodiment 4

[0047] The embodiment provides a gas regenerative oxidation heat supply method. The gas regenerative oxidation heat supply system in the embodiment 3 is in normal operation. Low-concentration gas with a concentration of 3% or less enters the gas concentration adjusting unit 1 from a gas inlet, is mixed with air sent by the air blower 2, and is adjusted to a preset concentration, enters the regenerative oxidation device 3, is oxidized in the regenerative oxidation device 3 and releases heat, generates high-temperature flue gas, enters the waste heat boiler 4, and exchanges heat with low-temperature water in the waste heat boiler 4. The high-temperature hot water enters the water distributor 7. The first type terminal inlet control valve 9, the second type terminal inlet control valve 11, the second type terminal outlet control valve 12, the heat storage inlet control valve 14, the heat storage outlet control valve 15 and the regenerative circulating water pump 16 are opened. The heat release outlet control valve 17 and the heat release inlet control valve 18 are closed. The water distributor 7 sends the high-temperature hot water to the first type heat supply terminal 8, the second type heat supply terminal 10 and the heat storage water tank 13. The heat storage water tank 13 stores heat. The low-temperature water returned by the first type heat supply terminal 8, the second type heat supply terminal 10 and the heat storage water tank 13 is pressurized by the regenerative circulating water pump 16 and enters the waste heat boiler 4 to absorb the heat contained in the high-temperature flue gas and become high-temperature hot water, forming a cycle.

[0048] When the heat provided by the waste heat boiler 4 is less than the demand of the second type heat supply terminal 10, the heat storage inlet control valve 14 and the heat storage outlet control valve 15 are closed, and the heat release outlet control valve 17, the heat release inlet control valve 18, the heat release circulating water pump 19, the heat release terminal inlet control valve 20 and the heat release terminal outlet control valve 21 are opened. The waste heat boiler 4 and the heat storage water tank 13 jointly supply heat to the second type heat supply terminal 10.

[0049] When the gas regenerative oxidation heat supply system is in a state that a gas source of the regenerative oxidation device 3 is unstable, the regenerative oxidation device 3 is faulty or a pipeline for supplying heat from the waste heat boiler 4 to the second type heat supply terminal 10 is faulty, the second type terminal inlet control valve 11, the second type terminal outlet control valve 12, the heat storage inlet control valve 14, the heat storage outlet control valve 15 and the regenerative circulating water pump 16 are closed, and the heat release outlet control valve 17, the heat release inlet control valve 18, the heat release circulating water pump 19, the heat release terminal inlet control valve 20 and the heat release terminal outlet control valve 21 are opened. The heat storage water tank 13 supplies heat to the second type heat supply terminal 10.

[0050] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas regenerative oxidation heat supply system, characterized by comprising: The gas concentration adjusting unit (1), the air blower (2), the regenerative oxidation device (3), the waste heat boiler (4), the boiler inlet control valve (5), the boiler outlet control valve (6), the water distributor (7), the second type heat supply terminal (10), the second type terminal inlet control valve (11), the second type terminal outlet control valve (12), the heat storage water tank (13), the heat storage inlet control valve (14), the heat storage outlet control valve (15), the regenerative circulating water pump (16), the heat release outlet control valve (17), the heat release inlet control valve (18), the heat release circulating water pump (19), the heat release terminal inlet control valve (20), and the heat release terminal outlet control valve (21) are included. The gas concentration adjusting unit (1) is provided with a gas inlet, an air inlet and a gas outlet, the gas inlet is connected with a gas pipeline, and the air inlet is connected with the air blower (2). The gas inlet of the regenerative oxidation device (3) is connected with the gas outlet of the gas concentration adjusting unit (1), and the high-temperature flue gas outlet is connected with the gas inlet of the waste heat boiler (4). The water inlet and the water outlet of the waste heat boiler (4) are respectively provided with the boiler inlet control valve (5) and the boiler outlet control valve (6), the boiler inlet control valve (5) is connected with the water outlet of the regenerative circulating water pump (16), and the boiler outlet control valve (6) is connected with the water inlet of the water distributor (7). The second type heat supply terminal (10) is provided with two groups of water inlets and water outlets, the two groups of water inlets are respectively provided with the second type terminal inlet control valve (11) and the heat release terminal inlet control valve (20), the two groups of water outlets are respectively provided with the second type terminal outlet control valve (12) and the heat release terminal outlet control valve (21), the second type terminal inlet control valve (11) is connected with the water outlet of the water distributor (7), and the second type terminal outlet control valve (12) is connected with the water inlet of the regenerative circulating water pump (16). The heat storage water tank (13) is provided with two groups of water inlets and water outlets, the two groups of water inlets are respectively provided with the heat storage inlet control valve (14) and the heat release inlet control valve (18), the two groups of water outlets are respectively provided with the heat storage outlet control valve (15) and the heat release outlet control valve (17), the heat storage inlet control valve (14) is connected with the water outlet of the water distributor (7), the heat storage outlet control valve (15) is connected with the water inlet of the regenerative circulating water pump (16), the heat release outlet control valve (17) is connected with the water inlet of the heat release circulating water pump (19), the water outlet of the heat release circulating water pump (19) is connected with the heat release terminal inlet control valve (20), and the heat release terminal outlet control valve (21) is connected with the heat release inlet control valve (18). The gas regenerative oxidation heating system runs normally, low-concentration gas with a concentration of 3% or less enters the gas inlet and is mixed with air sent by the air blower (2) in the gas concentration adjusting unit (1), and is adjusted to a preset concentration, enters the regenerative oxidation device (3), is oxidized and releases heat in the regenerative oxidation device (3), generates high-temperature flue gas, enters the waste heat boiler (4), the high-temperature flue gas exchanges heat with low-temperature water in the waste heat boiler (4), the high-temperature hot water enters the water distributor (7), the second-type terminal inlet control valve (11), the second-type terminal outlet control valve (12), the heat storage inlet control valve (14), the heat storage outlet control valve (15) and the regenerative circulating water pump (16) are opened, the heat release outlet control valve (17) and the heat release inlet control valve (18) are closed, the water distributor (7) sends the high-temperature hot water to the second-type heating terminal (10) and the heat storage water tank (13), and the heat storage water tank (13) stores heat; When the heat provided by the waste heat boiler (4) is less than the demand of the second-type heating terminal (10), the heat storage inlet control valve (14) and the heat storage outlet control valve (15) are closed, the heat release outlet control valve (17), the heat release inlet control valve (18), the heat release circulating water pump (19), the heat release terminal inlet control valve (20) and the heat release terminal outlet control valve (21) are opened, and the waste heat boiler (4) and the heat storage water tank (13) jointly supply heat to the second-type heating terminal (10); When the gas regenerative oxidation heating system, the regenerative oxidation device (3) gas source is unstable, the regenerative oxidation device (3) is faulty or the pipeline for supplying heat from the waste heat boiler (4) to the second-type heating terminal (10) is faulty, the second-type terminal inlet control valve (11), the second-type terminal outlet control valve (12), the heat storage inlet control valve (14), the heat storage outlet control valve (15) and the regenerative circulating water pump (16) are closed, the heat release outlet control valve (17), the heat release inlet control valve (18), the heat release circulating water pump (19), the heat release terminal inlet control valve (20) and the heat release terminal outlet control valve (21) are opened, and the heat storage water tank (13) supplies heat to the second-type heating terminal (10).

2. The gas regenerative oxidation heater system of claim 1, wherein, The capacity calculation formula of the heat storage water tank (13) is as follows: V = 947 · E / ( T C - T F ) Wherein: the heat storage water tank capacity V, unit m 3 ; design heat storage E, unit MWh; heat storage temperature T C , unit ℃; heat release temperature T F , unit ℃.

3. The gas regenerative oxidation heater system of claim 2, wherein, The value range of the heat storage temperature T C is 90 ~ 95℃, and the value range of the heat release temperature T F is 10 ~ 30℃.

4. The gas regenerative thermal oxidation system of claim 3, wherein, A plurality of parallel heat storage water tanks (13) are configured.

5. The gas recuperation oxidation heat supply system according to claim 4, characterized in that A plurality of parallel second-type heating terminals (10) are configured.

6. The gas recuperation oxidation heat supply system according to claim 5, characterized in that A plurality of parallel regenerative oxidation devices (3) and waste heat boilers (4) are configured.

7. A gas recuperation oxygen heating system according to any one of claims 1-6, characterized in that, The first-type heating terminal (8) and the first-type terminal inlet control valve (9) are further included; The first-type terminal inlet control valve (9) is arranged on the water inlet of the first-type heating terminal (8) and connected with the water outlet of the water distributor (7). The first-type terminal inlet control valve (9) is arranged on the water inlet of the first-type heating terminal (8) and connected with the water outlet of the water distributor (7).

8. The gas recuperation oxidation heat supply system according to claim 7, characterized in that A plurality of parallel first-type heating terminals (8) are configured.

Images