Indirect heating biomass gas turbine system and method thereof

Abstract

The invention belongs to the technical field of gas turbines, and relates to an indirect heating biomass gas turbine system and a method thereof, the indirect heating biomass gas turbine system comprises an air compressor, an air turbine, a generator, a combustion chamber, a first waste heat recovery module, an indirect heating module, a second waste heat recovery module and a third waste heat recovery module. The compressed air is heated in a mode of indirect heat exchange between the compressed air and the flue gas, direct contact between fuel combustion products and turbine blades is avoided, the problems of corrosion, dust deposition, abrasion, scaling and the like of the turbine blades are effectively prevented, the service life of core components such as the turbine blades is prolonged, and meanwhile the service life of the turbine blades is prolonged. The tail gas waste heat of the air turbine is used for heating compressed air, the average heat absorption temperature of air is increased, and therefore the fuel combustion thermoelectric conversion efficiency is improved, in addition, heat supply and cold supply are conducted on users through the tail gas waste heat of the air turbine, the energy utilization efficiency of the system is improved, and the energy consumption is reduced. And combined heat and power generation can be realized in winter, and combined cooling and power generation can be realized in summer.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas turbines and relates to an indirect heating biomass gas turbine system and a method thereof. Background Art

[0002] A gas turbine is a device that converts the thermal energy of gas into mechanical power output through a thermodynamic cycle. It has the advantages of high efficiency, fast startup, and short construction period. Traditional gas turbines usually include a compressor, a combustion chamber, and a turbine. They suck in and compress air from the atmosphere, and then provide high-pressure air to the combustion chamber. In the combustion chamber, the chemical energy of the fuel is converted into thermal energy, providing high-temperature and high-pressure flue gas to the turbine. Finally, the turbine is used to convert the thermal energy of the high-temperature and high-pressure flue gas into mechanical energy of the turbine rotor, and the mechanical energy is used to drive the generator to generate electricity.

[0003] At present, traditional gas turbines use direct combustion to introduce the flue gas generated by combustion directly into the turbine to perform work. This has many defects. First, impurities in the flue gas will affect the safe and stable operation of the turbine, posing a safety hazard; second, direct combustion power generation lacks a multi-energy synergistic utilization mechanism, resulting in a large amount of waste of medium and low-temperature waste heat resources. Summary of the Invention

[0004] The object of the present invention is to provide an indirect heating biomass gas turbine system and method thereof, which can ensure the safe and stable operation of the turbine while reducing the waste of low-temperature waste heat resources.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: An indirect heating biomass gas turbine system includes an air compressor, an air turbine, a generator and a combustion chamber, wherein the air compressor, the air turbine and the generator are coaxially connected, and further includes: a first waste heat recovery module, comprising a regenerator, wherein a first inlet of the regenerator is connected to the outlet of the air compressor, a second inlet of the regenerator is connected to the outlet of the air turbine, and the regenerator is used to heat the compressed air from the air compressor using the exhaust gas of the air turbine; An indirect heating module includes a heater and a preheater, wherein a first inlet of the heater is connected to a first outlet of a regenerator, the first outlet of the heater is connected to an inlet of an air turbine, a second inlet of the heater is connected to an outlet of a combustion chamber, the first inlet of the preheater is connected to the atmosphere, the first outlet of the preheater is connected to a first inlet of the combustion chamber, and the second inlet of the combustion chamber is connected to a fuel source. The preheater is used to deliver preheated air into the combustion chamber for combustion with the fuel, the generated flue gas enters the heater to reheat the heated compressed air and is discharged from the second outlet of the heater, the compressed air heated twice enters the air turbine for expansion and work, and the mechanical energy generated by the expansion and work drives the air compressor and the generator to generate electricity; a second waste heat recovery module connected to the second outlet of the regenerator, for utilizing waste heat in the exhaust gas of the air turbine to provide heating to users; The third waste heat recovery module is connected to the second outlet of the regenerator and is used to use the waste heat in the exhaust gas of the air turbine to provide cooling to the user.

[0006] The present invention is also characterized in that: The second outlet of the regenerator is connected to a second waste heat recovery module and a third waste heat recovery module respectively. The second waste heat recovery module is used to utilize the waste heat in the air turbine exhaust gas to provide heating to the user, and the third waste heat recovery module is used to utilize the waste heat in the air turbine exhaust gas to provide cooling to the user.

[0007] The second waste heat recovery module includes: a heating heat exchanger, wherein the first inlet is connected to the second outlet of the regenerator, and the first outlet of the heating heat exchanger is connected to the atmosphere; The first circulation component is connected to the second inlet and the second outlet of the heating heat exchanger, and is used to introduce circulating water into the heating heat exchanger for heating and then delivering it to the user.

[0008] The third waste heat recovery module includes: A generator, wherein the first inlet is connected to the second outlet of the regenerator, the first outlet of the generator is connected to the atmosphere, the generator stores a pressurized refrigerant concentrated solution, and the generator is used to obtain a dilute refrigerant solution and refrigerant vapor after the refrigerant concentrated solution absorbs heat; A condenser, the inlet of which is connected to the second outlet of the generator, the condenser introduces refrigerant vapor and condenses the refrigerant vapor; The evaporator, the first inlet and the condenser are connected via a throttle valve; The second circulation part is connected to the second inlet and the second outlet of the evaporator, and is used to send the cooling medium into the evaporator to absorb the coldness in the condensed refrigerant passing through the throttle valve to provide cooling to the user, and at the same time, the condensed refrigerant is converted into refrigerant vapor.

[0009] The first outlet of the evaporator is connected to the first inlet of the absorber, the second inlet of the absorber is connected to the third outlet of the generator through a pressure reducing valve, and the outlet of the absorber is connected to the second inlet of the generator through a booster pump. The absorber is used to utilize the dilute refrigerant solution from the generator and absorb the refrigerant vapor after reducing the pressure through the pressure reducing valve to obtain a concentrated refrigerant solution, which is then pressurized by the booster pump and sent into the generator.

[0010] The refrigerant is ammonia water or lithium bromide.

[0011] The second outlet of the heater is connected to the second inlet of the preheater. The preheater is used to preheat the air using the flue gas after heat exchange. The second outlet of the preheater is connected to the carbon capture device.

[0012] An indirect heating biomass gas turbine method comprises the following steps: Normal temperature air is introduced into the air compressor and preheater respectively. Normal temperature air enters the air compressor for compression to obtain medium temperature and high pressure air. The medium temperature and high pressure air enters the regenerator for heating to obtain medium temperature and high pressure air. Normal temperature air enters the preheater for preheating and then enters the combustion chamber to burn with fuel to obtain high temperature flue gas. The high temperature flue gas enters the heater for heat exchange with the medium temperature and high pressure air. The medium temperature and high pressure air becomes high temperature and high pressure air and enters the air turbine for expansion and work. The mechanical energy generated by the expansion work drives the air compressor and the generator to generate electricity. The high temperature flue gas enters the preheater for heat exchange and cooling and then is discharged. The high temperature and high pressure air after expansion and work enters the regenerator for heat exchange and cooling to become medium temperature and normal pressure air. During heating, medium-temperature and normal-pressure air enters the heating heat exchanger to heat the circulating water, which is then used to provide heating to users and then discharged into the atmosphere. During cooling, medium-temperature and normal-pressure air enters the generator to heat the high-pressure refrigerant concentrated solution, and then is discharged into the atmosphere. The high-pressure refrigerant concentrated solution absorbs heat and becomes a dilute refrigerant solution and medium-temperature and high-pressure refrigerant vapor. The medium-temperature and high-pressure refrigerant vapor enters the condenser and condenses to obtain medium-low-temperature and high-pressure refrigerant. The medium-low-temperature and high-pressure refrigerant passes through the throttle valve to obtain low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the evaporator to exchange heat with the cooling medium. The cooling medium absorbs the cold and supplies cooling to the user. The low-temperature and low-pressure refrigerant absorbs heat and becomes low-temperature and low-pressure refrigerant vapor and enters the absorber. The dilute refrigerant solution in the generator is reduced in pressure by the pressure-reducing valve and then enters the absorber to absorb the low-temperature and low-pressure refrigerant vapor to obtain a concentrated refrigerant solution. The concentrated refrigerant solution is pressurized by the booster pump to obtain a high-pressure concentrated refrigerant solution and enters the generator for recirculation.

[0013] The temperature of medium temperature and high pressure air is 160℃~200℃ and the pressure is 300kPa~400kPa, the temperature of medium temperature and high pressure air is 500℃~600℃ and the pressure is 300kPa~400kPa, the temperature of high temperature flue gas is 1000℃~1300℃, the temperature of high temperature and high pressure air is 900℃~1200℃ and the pressure is 300kPa~400kPa, the temperature of medium temperature and normal pressure air is 550℃~600℃, The pressure is 101.3kPa, the pressure of the high-pressure refrigerant concentrated solution is 1.17MPa~1.35MPa, the temperature of the medium-temperature and high-pressure refrigerant vapor is 150℃~160℃, and the pressure is 1.17MPa~1.35MPa, the temperature of the medium-low temperature and high-pressure refrigerant is 30℃~35℃, and the pressure is 1.17MPa~1.35MPa, and the temperature of the low-temperature and low-pressure refrigerant is -5℃~0℃, and the pressure is 350kPa~430kPa.

[0014] The fuel is biomass fuel.

[0015] The indirect heating biomass gas turbine system and method of the present invention have the following advantages: The present invention heats the compressed air by indirect heat exchange between compressed air and flue gas, avoiding direct contact between fuel combustion products and turbine blades, effectively preventing problems such as corrosion, dust accumulation, wear and scaling of turbine blades, extending the service life of core components such as turbine blades, and ensuring the reliability and stability of long-term operation of the system. At the same time, the waste heat of the exhaust gas of the air turbine is used to heat the compressed air, and the average heat absorption temperature of the air is increased, thereby improving the thermal power conversion efficiency of fuel combustion. In addition, by utilizing the waste heat of the exhaust gas of the air turbine to provide heating and cooling to users, not only the energy utilization efficiency of the system is improved, but also cogeneration of heat and power can be achieved in winter and cogeneration of cooling and power in summer, thereby realizing the joint supply of different types of energy in different seasons and avoiding the waste of low-temperature waste heat resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the overall process of the present invention.

[0018] Reference numerals: 1. Air compressor, 2. Regenerator, 3. Heater, 4. Air turbine, 5. Combustion chamber, 6. Preheater, 7. Carbon capture device, 8. Generator, 9. Condenser, 10. Throttle valve, 11. Evaporator, 12. Absorber, 13. Booster pump, 14. Pressure reducing valve, 15. Heating heat exchanger, 101. First control valve, 102. Second control valve, 103. Third control valve. DETAILED DESCRIPTION

[0019] The technical solutions in the present invention will be described clearly and in detail below with reference to the accompanying drawings. In the description of the embodiments of the present invention, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, such as A and / or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present invention, "multiple" refers to two or more than two. The following terms "first" and "second" are used for descriptive purposes only and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0020] like Figure 1As shown, the present invention provides an indirect heating biomass gas turbine system, including an air compressor 1, an air turbine 4, a generator, a combustion chamber 5, a first waste heat recovery module, an indirect heating module, a second waste heat recovery module and a third waste heat recovery module. The air compressor 1, the air turbine 4 and the generator are coaxially connected. The first waste heat recovery module includes a regenerator 2, a first inlet of the regenerator 2 is connected to the outlet of the air compressor 1, and a second inlet of the regenerator 2 is connected to the outlet of the air turbine 4. The regenerator 2 is used to heat the compressed air from the air compressor 1 using the exhaust gas of the air turbine 4. The indirect heating module includes a heater 3 and a preheater 6, a first inlet of the heater 3 is connected to the first outlet of the regenerator 2, a first outlet of the heater 3 is connected to the inlet of the air turbine 4, and a second inlet of the heater 3 is connected to the outlet of the combustion chamber 5. The first inlet of the preheater 6 is connected to the atmosphere, the first outlet of the preheater 6 is connected to the first inlet of the combustion chamber 5, and the second inlet of the combustion chamber 5 is connected to the fuel source. The preheater 6 is used to send the preheated air into the combustion chamber 5 for combustion with the fuel. The generated flue gas enters the heater 3 to heat the heated compressed air again and is discharged from the second outlet of the heater 3. The compressed air after twice heating enters the air turbine 4 to expand and do work. The mechanical energy generated by the expansion work drives the air compressor 1 and drives the generator to generate electricity. The second waste heat recovery module is connected to the second outlet of the regenerator 2. The second waste heat recovery module is used to use the waste heat in the exhaust gas of the air turbine 4 to provide heating to the user. The third waste heat recovery module is connected to the second outlet of the regenerator 2. The third waste heat recovery module is used to use the waste heat in the exhaust gas of the air turbine 4 to provide cooling to the user. The present invention heats the compressed air by indirect heat exchange between compressed air and flue gas, avoiding direct contact between fuel combustion products and turbine blades, effectively preventing problems such as corrosion, dust accumulation, wear and scaling of turbine blades, extending the service life of core components such as turbine blades, and ensuring the reliability and stability of long-term operation of the system. At the same time, the exhaust waste heat of the air turbine 4 is used to heat the compressed air, and the average heat absorption temperature of the air is increased, thereby improving the fuel combustion thermoelectric conversion efficiency. In addition, by utilizing the exhaust waste heat of the air turbine 4 to provide heating and cooling to users, not only the energy utilization efficiency of the system is improved, but also cogeneration of heat and power can be achieved in winter and cogeneration of cooling and power in summer, thereby realizing the joint supply of different types of energy in different seasons and avoiding the waste of low-temperature waste heat resources.

[0021] like Figure 1 As shown, the second outlet of the regenerator 2 is respectively connected to the second waste heat recovery module and the third waste heat recovery module. The second waste heat recovery module is used to utilize the waste heat in the exhaust gas of the air turbine 4 to provide heating to the user, and the third waste heat recovery module is used to utilize the waste heat in the exhaust gas of the air turbine 4 to provide cooling to the user. By further converting the waste heat of the exhaust gas of the air turbine 4 into heat and cooling, the energy utilization efficiency of the system is improved.

[0022] like Figure 1 As shown, the second waste heat recovery module includes a heating heat exchanger 15 and a first circulation component. The first inlet of the heating heat exchanger 15 is connected to the second outlet of the regenerator 2, the first outlet of the heating heat exchanger 15 is connected to the atmosphere, and the first circulation component is connected to the second inlet and the second outlet of the heating heat exchanger 15. The first circulation component is used to introduce circulating water into the heating heat exchanger 15 for heating and then transporting it to the user.

[0023] Among them, the first circulation component includes a first circulation pump, the inlet of the first circulation pump is connected to the user side through a first connecting pipe, the outlet of the first circulation pump is connected to the second inlet of the heating heat exchanger 15, and the second outlet of the heating heat exchanger 15 is connected to the user side through a second connecting pipe. The circulating medium of the first circulation component is circulating water.

[0024] like Figure 1 As shown, the third waste heat recovery module includes a generator 8, a condenser 9 and a second circulation component. The first inlet of the generator 8 is connected to the second outlet of the regenerator 2, and the first outlet of the generator 8 is connected to the atmosphere. A pressurized refrigerant concentrated solution is stored in the generator 8. The generator 8 is used to obtain a dilute refrigerant solution and refrigerant vapor after absorbing heat from the refrigerant concentrated solution. The inlet of the condenser 9 is connected to the second outlet of the generator 8. The condenser 9 introduces refrigerant vapor and condenses the refrigerant vapor. The first inlet of the evaporator 11 is connected to the condenser 9 through a throttle valve 10. The second circulation component is connected to the second inlet and the second outlet of the evaporator 11. The second circulation component is used to send the cooling medium into the evaporator 11 to absorb the cold in the condensed refrigerant passing through the throttle valve 10 to supply cooling to the user, and at the same time, the condensed refrigerant is converted into refrigerant vapor.

[0025] Among them, the second circulation component includes a second circulation pump, the inlet of the second circulation pump is connected to the user side through a third connecting pipe, the outlet of the second circulation pump is connected to the second inlet of the evaporator 11, and the second outlet of the evaporator 11 is connected to the user side through a fourth connecting pipe. The circulating medium of the second circulation component is a cooling medium.

[0026] like Figure 1 As shown, the first outlet of the evaporator 11 is connected to the first inlet of the absorber 12, the second inlet of the absorber 12 is connected to the third outlet of the generator 8 through a pressure reducing valve 14, and the outlet of the absorber 12 is connected to the second inlet of the generator 8 through a booster pump 13. The absorber 12 is used to utilize the dilute refrigerant solution from the generator 8 and absorb the refrigerant vapor after reducing the pressure through the pressure reducing valve 14 to obtain a concentrated refrigerant solution, which is then pressurized by the booster pump 13 and sent into the generator 8.

[0027] like Figure 1 As shown, the refrigerant is ammonia water or lithium bromide.

[0028] like Figure 1 As shown, the second outlet of the heater 3 is connected to the second inlet of the preheater 6, which is used to preheat the air with the flue gas after heat exchange. The second outlet of the preheater 6 is connected to the carbon capture device 7, which uses the waste heat of the flue gas to preheat the air, thereby increasing the air temperature in the combustion chamber and effectively reducing fuel consumption. At the same time, the flue gas is processed by the carbon capture device 7 to effectively separate and capture the carbon dioxide therein, thereby reducing the carbon dioxide content ultimately discharged into the atmosphere and ensuring low carbon emissions of the system.

[0029] like Figure 1 As shown, the inlet of the air compressor 1 is provided with a first control valve 101 , the first inlet of the heating heat exchanger 15 is provided with a second control valve 102 , and the first inlet of the generator 8 is provided with a third control valve 103 .

[0030] like Figure 2 As shown, the present invention also provides an indirect heating biomass gas turbine method, comprising the following steps: Normal temperature air is introduced into the air compressor 1 and the preheater 6 respectively. Normal temperature air enters the air compressor 1 for compression to obtain medium temperature and high pressure air. The medium temperature and high pressure air enters the regenerator 2 for heating to obtain medium temperature and high pressure air. The normal temperature air enters the preheater 6 for preheating and then enters the combustion chamber 5 to burn with the fuel to obtain high temperature flue gas. The high temperature flue gas enters the heater 3 for heat exchange with the medium temperature and high pressure air. The medium temperature and high pressure air becomes high temperature and high pressure air and enters the air turbine 4 for expansion and work. The mechanical energy generated by the expansion work drives the air compressor 1 and drives the generator to generate electricity. The high temperature flue gas enters the preheater 6 for heat exchange and cooling and then is discharged. The high temperature and high pressure air after expansion and work enters the regenerator 2 for heat exchange and cooling to become medium temperature and normal pressure air. During heating, the medium-temperature, normal-pressure air enters the heating heat exchanger 15 to heat the circulating water, which is then used to provide heating to the user and then discharged into the atmosphere. During cooling, medium-temperature and normal-pressure air enters the generator 8 to heat the high-pressure refrigerant concentrated solution, and then is discharged into the atmosphere. The high-pressure refrigerant concentrated solution absorbs heat and becomes a dilute refrigerant solution and medium-temperature and high-pressure refrigerant vapor. The medium-temperature and high-pressure refrigerant vapor enters the condenser 9 to condense to obtain medium-low-temperature and high-pressure refrigerant. The medium-low-temperature and high-pressure refrigerant passes through the throttle valve 10 to obtain a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the evaporator 11 to exchange heat with the cooling medium. The cooling medium absorbs the cold energy and provides cooling to the user. The low-temperature and low-pressure refrigerant absorbs heat and becomes a low-temperature and low-pressure refrigerant vapor and enters the absorber 12. The dilute refrigerant solution in the generator 8 is reduced in pressure by the pressure-reducing valve 14 and then enters the absorber 12 to absorb the low-temperature and low-pressure refrigerant vapor to obtain a concentrated refrigerant solution. The concentrated refrigerant solution is pressurized by the booster pump 13 to obtain a high-pressure refrigerant concentrated solution and enters the generator 8 for recirculation.

[0031] Among them, the fuel is biomass fuel.

[0032] Among them, the temperature of medium-temperature high-pressure air is 160℃~200℃ and the pressure is 300kPa~400kPa, the temperature of medium-temperature high-pressure air is 500℃~600℃ and the pressure is 300kPa~400kPa, the temperature of high-temperature flue gas is 1000℃~1300℃, the temperature of high-temperature high-pressure air is 900℃~1200℃ and the pressure is 300kPa~400kPa, the temperature of medium-temperature normal-pressure air is 550℃~600℃, The pressure is 101.3kPa, the pressure of the high-pressure refrigerant concentrated solution is 1.17MPa~1.35MPa, the temperature of the medium-temperature and high-pressure refrigerant vapor is 150℃~160℃, and the pressure is 1.17MPa~1.35MPa, the temperature of the medium-low temperature and high-pressure refrigerant is 30℃~35℃, and the pressure is 1.17MPa~1.35MPa, and the temperature of the low-temperature and low-pressure refrigerant is -5℃~0℃, and the pressure is 350kPa~430kPa.

[0033] Working principle: When the system is running, open the first control valve 101 and introduce normal temperature air into the air compressor 1 and the preheater 6 respectively. The normal temperature air enters the air compressor 1 for compression to obtain medium temperature and high pressure air. The medium temperature and high pressure air enters the reheater 2 for heating to obtain medium temperature and high pressure air. The normal temperature air enters the preheater 6 for preheating and then enters the combustion chamber 5 to burn with the fuel to obtain high temperature flue gas. The high temperature flue gas enters the heater 3 for heat exchange with the medium temperature and high pressure air. The medium temperature and high pressure air becomes high temperature and high pressure air and enters the air turbine 4 for expansion and work. The mechanical energy generated by the expansion work drives the air compressor 1 and drives the generator to generate electricity. The high temperature flue gas enters the preheater 6 for heat exchange and cooling and then is discharged. The high temperature and high pressure air after expansion and work enters the reheater 2 for heat exchange and cooling to become medium temperature and normal pressure air.

[0034] When heating is needed in winter, the second control valve 102 is opened and the third control valve 103 is closed. The medium-temperature and normal-pressure air enters the heating heat exchanger 15 to heat the circulating water. The heated circulating water is used to provide heating to the user and then discharged into the atmosphere.

[0035] When cooling is needed in summer, the third control valve 103 is opened and the second control valve 102 is closed. The medium-temperature and normal-pressure air enters the generator 8 to heat the high-pressure refrigerant concentrated solution, and is then discharged into the atmosphere. The high-pressure refrigerant concentrated solution absorbs heat and becomes a dilute refrigerant solution and medium-temperature and medium-pressure refrigerant vapor. The medium-temperature and medium-pressure refrigerant vapor enters the condenser 9 to condense to obtain medium-low-temperature and medium-pressure refrigerant. The medium-low-temperature and medium-pressure refrigerant passes through the throttle valve 10 to obtain a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the evaporator 11 to exchange heat with the cooling medium. The cooling medium absorbs the cold and provides cooling to the user. The low-temperature and low-pressure refrigerant absorbs heat and becomes a low-temperature and low-pressure refrigerant vapor. The low-temperature and low-pressure refrigerant vapor enters the absorber 12 and is absorbed by the dilute refrigerant solution from the generator 8 and is pressurized by the booster pump 13 to obtain a high-pressure refrigerant concentrated solution and enters the generator 8 for recirculation.

[0036] Other advantages of the indirect heating biomass gas turbine system and method of the present invention are as follows: First, the present invention can utilize the exhaust waste heat of the air turbine in a cascade manner and further convert it into heat and cooling through the cooperation of the air turbine, the regenerator, the second waste heat recovery module and the third waste heat recovery module.

[0037] Second, the present invention utilizes the waste heat of flue gas to preheat the air, thereby increasing the air temperature in the combustion chamber and effectively reducing fuel consumption.

[0038] Third, the present invention utilizes a carbon capture device to treat flue gas, effectively separating and capturing carbon dioxide therein, thereby reducing the carbon dioxide content ultimately emitted into the atmosphere and ensuring low carbon emissions of the system.

[0039] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present invention are intended to be protected by the present invention.

Claims

1. An indirect heating biomass gas turbine system, comprising an air compressor (1), an air turbine (4), a generator and a combustion chamber (5), wherein the air compressor (1), the air turbine (4) and the generator are coaxially connected, and characterized in that: Also includes: A first waste heat recovery module includes a regenerator (2), a first inlet of the regenerator (2) connected to the outlet of the air compressor (1), a second inlet of the regenerator (2) connected to the outlet of the air turbine (4), and the regenerator (2) is used to heat the compressed air from the air compressor (1) using the exhaust gas of the air turbine (4); An indirect heating module comprises a heater (3) and a preheater (6), wherein a first inlet of the heater (3) is connected to a first outlet of the regenerator (2), a first outlet of the heater (3) is connected to an inlet of an air turbine (4), a second inlet of the heater (3) is connected to an outlet of a combustion chamber (5), a first inlet of the preheater (6) is connected to the atmosphere, a first outlet of the preheater (6) is connected to a first inlet of the combustion chamber (5), and a second inlet of the combustion chamber (5) is connected to a fuel source. The preheater (6) is used to send preheated air into the combustion chamber (5) for combustion with the fuel, and the generated flue gas enters the heater (3) to heat the heated compressed air again and is discharged from the second outlet of the heater (3). The compressed air heated twice enters the air turbine (4) for expansion and work, and the mechanical energy generated by the expansion and work drives the air compressor (1) and the generator to generate electricity; A second waste heat recovery module is connected to the second outlet of the regenerator (2) and is used to utilize waste heat in the exhaust gas of the air turbine (4) to provide heating to users; The third waste heat recovery module is connected to the second outlet of the regenerator (2) and is used to utilize the waste heat in the tail gas of the air turbine (4) to provide cooling to the user.

2. The indirect heating biomass gas turbine system according to claim 1, characterized in that: The second waste heat recovery module includes: A heating heat exchanger (15), wherein a first inlet is connected to the second outlet of the regenerator (2), and a first outlet of the heating heat exchanger (15) is connected to the atmosphere; The first circulation element is connected to the second inlet and the second outlet of the heating heat exchanger (15) and is used to introduce circulating water into the heating heat exchanger (15), heat it, and then deliver it to the user.

3. The indirect heating biomass gas turbine system according to claim 2, characterized in that: The third waste heat recovery module includes: A generator (8), wherein a first inlet is connected to a second outlet of the regenerator (2), and a first outlet of the generator (8) is connected to the atmosphere. A pressurized refrigerant concentrated solution is stored in the generator (8), and the generator (8) is used to obtain a dilute refrigerant solution and refrigerant vapor after the refrigerant concentrated solution absorbs heat; A condenser (9), the inlet of which is connected to the second outlet of the generator (8), wherein the condenser (9) introduces refrigerant vapor and condenses the refrigerant vapor; The evaporator (11), the first inlet and the condenser (9) are connected via a throttle valve (10); The second circulation element is connected to the second inlet and the second outlet of the evaporator (11) and is used to send the cooling medium into the evaporator (11) to absorb the cold energy in the condensed refrigerant passing through the throttle valve (10) to supply cooling to the user, and at the same time, the condensed refrigerant is converted into refrigerant vapor.

4. The indirect heating biomass gas turbine system according to claim 3, characterized in that: The first outlet of the evaporator (11) is connected to the first inlet of the absorber (12), the second inlet of the absorber (12) is connected to the third outlet of the generator (8) via a pressure reducing valve (14), and the outlet of the absorber (12) is connected to the second inlet of the generator (8) via a booster pump (13). The absorber (12) is used to utilize the dilute refrigerant solution from the generator (8) and absorb the refrigerant vapor after reducing the pressure through the pressure reducing valve (14) to obtain a concentrated refrigerant solution, which is then pressurized by the booster pump (13) and sent into the generator (8).

5. The indirect heating biomass gas turbine system according to claim 4, characterized in that: The refrigerant is ammonia water or lithium bromide.

6. The indirect heating biomass gas turbine system according to claim 1, characterized in that: The second outlet of the heater (3) is connected to the second inlet of the preheater (6), and the preheater (6) is used to preheat the air using the flue gas after heat exchange. The second outlet of the preheater (6) is connected to a carbon capture device (7).

7. An indirect heating biomass gas turbine method, characterized in that: The system according to claim 5 comprises the following steps: Normal temperature air is introduced into the air compressor (1) and the preheater (6) respectively. Normal temperature air enters the air compressor (1) for compression to obtain medium temperature and high pressure air. The medium temperature and high pressure air enters the regenerator (2) for heating to obtain medium temperature and high pressure air. Normal temperature air enters the preheater (6) for preheating and then enters the combustion chamber (5) to burn with fuel to obtain high temperature flue gas. The high temperature flue gas enters the heater (3) to exchange heat with the medium temperature and high pressure air. The medium temperature and high pressure air is converted into high temperature and high pressure air and enters the air turbine (4) to expand and perform work. The mechanical energy generated by the expansion work drives the air compressor (1) and drives the generator to generate electricity. The high temperature flue gas enters the preheater (6) after heat exchange and is discharged after heat exchange and cooling. The high temperature and high pressure air after expansion and work enters the regenerator (2) to exchange heat and cool to obtain medium temperature and normal pressure air. During heating, medium-temperature normal-pressure air enters the heating heat exchanger (15) to heat circulating water, and the heated circulating water is used to provide heating to users, and then discharged into the atmosphere; During cooling, medium-temperature normal-pressure air enters the generator (8) to heat the high-pressure refrigerant concentrated solution, and then is discharged into the atmosphere. The high-pressure refrigerant concentrated solution absorbs heat and becomes a dilute refrigerant solution and medium-temperature high-pressure refrigerant vapor. The medium-temperature high-pressure refrigerant vapor enters the condenser (9) and is condensed to obtain medium-low-temperature high-pressure refrigerant. The medium-low-temperature high-pressure refrigerant passes through the throttle valve (10) to obtain a low-temperature low-pressure refrigerant. The low-temperature low-pressure refrigerant enters the evaporator (11) to exchange heat with the cooling medium. The cooling medium absorbs the cold energy and provides cooling to the user. The low-temperature low-pressure refrigerant absorbs heat and becomes a low-temperature low-pressure refrigerant vapor and enters the absorber (12). The dilute refrigerant solution in the generator (8) is reduced in pressure by the pressure-reducing valve (14) and then enters the absorber (12) to absorb the low-temperature low-pressure refrigerant vapor to obtain a concentrated refrigerant solution. The concentrated refrigerant solution is pressurized by the booster pump (13) to obtain a high-pressure refrigerant concentrated solution and enters the generator (8) for recirculation.

8. The indirect heating biomass gas turbine method according to claim 7, characterized in that: The temperature of the medium-temperature high-pressure air is 160°C~200°C and the pressure is 300kPa~400kPa, the temperature of the medium-temperature high-pressure air is 500°C~600°C and the pressure is 300kPa~400kPa, the temperature of the high-temperature flue gas is 1000°C~1300°C, the temperature of the high-temperature high-pressure air is 900°C~1200°C and the pressure is 300kPa~400kPa, the temperature of the medium-temperature normal-pressure air is 550°C~600°C, The pressure is 101.3kPa, the pressure of the high-pressure refrigerant concentrated solution is 1.17MPa~1.35MPa, the temperature of the medium-temperature and high-pressure refrigerant vapor is 150℃~160℃, and the pressure is 1.17MPa~1.35MPa, the temperature of the medium-low temperature and high-pressure refrigerant is 30℃~35℃, and the pressure is 1.17MPa~1.35MPa, and the temperature of the low-temperature and low-pressure refrigerant is -5℃~0℃, and the pressure is 350kPa~430kPa.

9. The indirect heating biomass gas turbine method according to claim 7, characterized in that: The fuel is biomass fuel.

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