Dual-fuel high-temperature heat source and dual-fuel gas turbine unit

Abstract

This invention provides a dual-fuel high-temperature heat source and a dual-fuel gas turbine device, belonging to the field of thermodynamics and thermal power technology. An external high-grade fuel channel connects to a heating furnace, and an external air channel connects to the heating furnace via a heat source regenerator. The heating furnace also has a gas channel connecting to the outside via the heat source regenerator. An external low-grade fuel channel connects to the combustion chamber, and an external air channel connects to the combustion chamber via a compressor and a high-temperature regenerator. The combustion chamber also has a gas channel connecting to the gas turbine via the heating furnace. The gas turbine then has a gas channel connecting to itself via the high-temperature regenerator, and a gas channel connecting to the outside. The gas turbine connects to the compressor and transmits power, forming a dual-fuel gas turbine device. The combustion chamber, heating furnace, and heat source regenerator constitute the dual-fuel high-temperature heat source.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of thermodynamics and thermodynamic technology. BACKGROUND

[0002] Cold demand, heat demand and power demand are common in human life and production; among them, the high-temperature heat source formed by burning different quality fossil fuels, biomass fuels and the like is the primary link for cold, heat and power production and utilization; reducing the temperature difference irreversible loss in the high-temperature heat source formation process is the key and primary link to achieve energy efficient utilization; converting the chemical energy of fuel into heat energy through combustion, and then converting the heat energy into mechanical energy through different heat-to-work devices, is an important means to provide power or electricity to humans.

[0003] There are different types and different properties of fuels, and the temperature of the fuel combustion to form the combustion gas is closely related to the conversion efficiency; from the temperature of the combustion gas formed, such as the adiabatic combustion temperature or the constant pressure combustion temperature, the high-grade fuel with high constant pressure combustion temperature corresponds to a high-grade heat source, which can convert more mechanical energy; while the low-grade fuel with low constant pressure combustion temperature is difficult to form high-temperature combustion products, corresponding to a low-grade heat source, and the converted mechanical energy is relatively small.

[0004] Due to the limitation of working principle, or the limitation of the properties of working medium, or the limitation of material properties, or the limitation of the manufacturing level of compression equipment and other components, there is a large temperature difference loss in the formation process of high-temperature heat source in the combustion chamber of the gas power device using high-grade fuel, which brings a large quality loss in fuel utilization; however, this provides an opportunity for low-grade fuel to participate in the construction of high-temperature heat source and provide driving heat load.

[0005] People need to use fuel simply, actively, safely and efficiently to form high-temperature heat source, and the present application provides a dual-fuel high-temperature heat source and a dual-fuel gas turbine device, which reasonably uses low-grade fuel and high-grade fuel to realize complementary advantages and improve the utilization value of both fuels, reduce greenhouse gas emissions, and effectively reduce fuel costs. SUMMARY

[0006] The main purpose of the present application is to provide a dual-fuel high-temperature heat source and a dual-fuel gas turbine device, and the specific invention content is described as follows:

[0007] 1. A dual-fuel high-temperature heat source mainly consists of a combustion chamber, a heating furnace, and a heat source regenerator. It has a high-grade fuel channel connected to the heating furnace, an air channel connected to the heating furnace via the heat source regenerator, a gas channel connected to the outside via the heat source regenerator, a low-grade fuel channel connected to the combustion chamber, an air channel connected to the combustion chamber, and a gas channel connected to the outside via the heating furnace, thus forming a dual-fuel high-temperature heat source.

[0008] 2. A dual-fuel gas turbine unit mainly consists of a combustion chamber, a heater, a heat source regenerator, a compressor, and a gas turbine. It has an external high-grade fuel passage connecting to the heater, an external air passage connecting to the heater via the heat source regenerator, a gas passage connecting the heater to the outside via the heat source regenerator, an external low-grade fuel passage connecting to the combustion chamber, an external air passage connecting to the combustion chamber via the compressor, and a gas passage connecting the combustion chamber to the outside via the heater and the gas turbine. The gas turbine connects to the compressor and transmits power, forming a dual-fuel gas turbine unit.

[0009] 3. A dual-fuel gas turbine unit mainly consists of a combustion chamber, a heater, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. Externally, it has a high-grade fuel passage connecting to the heater, and an external air passage connecting to the heater via the heat source regenerator. The heater also has a gas passage connecting to the outside via the heat source regenerator. Externally, it has a low-grade fuel passage connecting to the combustion chamber, and externally, it has an air passage connecting to the combustion chamber via the compressor and the high-temperature regenerator. The combustion chamber also has a gas passage connecting to the gas turbine via the heater, and the gas turbine also has a gas passage connecting to the outside via the high-temperature regenerator. The gas turbine connects to the compressor and transmits power, forming a dual-fuel gas turbine unit.

[0010] 4. A dual-fuel gas turbine unit mainly consists of a combustion chamber, a heater, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. Externally, it has a high-grade fuel passage connecting to the heater, and an external air passage connecting to the heater via the heat source regenerator. The heater also has a gas passage connecting to the outside via the heat source regenerator. Externally, it has a low-grade fuel passage connecting to the combustion chamber, and an external air passage connecting to the combustion chamber via the compressor. The combustion chamber also has a gas passage connecting to the gas turbine via the high-temperature regenerator and the heater, and the gas turbine also has a gas passage connecting to the outside via the high-temperature regenerator. The gas turbine connects to the compressor and transmits power, forming a dual-fuel gas turbine unit.

[0011] 5. A dual-fuel gas turbine unit mainly consists of a combustion chamber, a heater, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. Externally, it has a high-grade fuel passage connecting to the heater, and an external air passage connecting to the heater via the heat source regenerator. The heater also has a gas passage connecting to the outside via the heat source regenerator. Externally, it has a low-grade fuel passage connecting to the combustion chamber, and an external air passage connecting to the combustion chamber via the compressor and the high-temperature regenerator. The combustion chamber also has a gas passage connecting to the gas turbine via the heater, and the gas turbine itself has a gas passage connecting to itself via the high-temperature regenerator. The gas turbine also has a gas passage connecting to the outside. The gas turbine connects to the compressor and transmits power, forming a dual-fuel gas turbine unit.

[0012] 6. A dual-fuel gas turbine unit mainly consists of a combustion chamber, a heater, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. Externally, it has a high-grade fuel passage connecting to the heater, and an external air passage connecting to the heater via the heat source regenerator. The heater also has a gas passage connecting to the outside via the heat source regenerator. Externally, it has a low-grade fuel passage connecting to the combustion chamber, and an external air passage connecting to the combustion chamber via the compressor. The combustion chamber also has a gas passage connecting to the gas turbine via the high-temperature regenerator and the heater. The gas turbine then has a gas passage connecting to itself via the high-temperature regenerator, and another gas passage connecting to the outside. The gas turbine connects to the compressor and transmits power, forming a dual-fuel gas turbine unit.

[0013] 7. A dual-fuel gas turbine unit mainly consists of a combustion chamber, a heater, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. Externally, it has a high-grade fuel passage connecting to the heater, and an external air passage connecting to the heater via the heat source regenerator. The heater also has a gas passage connecting to the outside via the heat source regenerator. Externally, it has a low-grade fuel passage connecting to the combustion chamber, and an external air passage connecting to the compressor. The compressor then has an air passage connecting to itself via the high-temperature regenerator, and an air passage connecting to the combustion chamber. The combustion chamber has a gas passage connecting to the gas turbine via the heater, and the gas turbine also has a gas passage connecting to the outside via the high-temperature regenerator. The gas turbine connects to the compressor and transmits power, forming a dual-fuel gas turbine unit.

[0014] 8. A dual-fuel gas turbine unit mainly consists of a combustion chamber, a heater, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. Externally, it has a high-grade fuel passage connecting to the heater; externally, it also has an air passage connecting to the heater via the heat source regenerator; the heater has a gas passage connecting to the outside via the heat source regenerator; externally, it has a low-grade fuel passage connecting to the combustion chamber; externally, it has an air passage connecting to the compressor, which in turn has an air passage connecting to itself via the high-temperature regenerator; the compressor also has an air passage connecting to the combustion chamber; the combustion chamber has a gas passage connecting to the gas turbine via the heater; the gas turbine then has a gas passage connecting to itself via the high-temperature regenerator; and the gas turbine also has a gas passage connecting to the outside. The gas turbine connects to the compressor and transmits power, forming a dual-fuel gas turbine unit. Attached image description:

[0015] Figure 1 This is a principle thermodynamic system diagram of a dual-fuel gas turbine device provided in accordance with the present invention.

[0016] Figure 2 This is a first principle thermodynamic system diagram of a dual-fuel gas turbine device provided according to the present invention.

[0017] Figure 3 This is a second principle thermodynamic system diagram of a dual-fuel gas turbine device provided according to the present invention.

[0018] Figure 4 This is a third principle thermodynamic system diagram of a dual-fuel gas turbine device provided according to the present invention.

[0019] Figure 5 This is a fourth principle thermodynamic system diagram of a dual-fuel gas turbine device provided according to the present invention.

[0020] Figure 6 This is a fifth principle thermodynamic system diagram of a dual-fuel gas turbine device provided according to the present invention.

[0021] Figure 7 This is a sixth principle thermodynamic system diagram of a dual-fuel gas turbine device provided according to the present invention.

[0022] Figure 8 This is the seventh principle thermodynamic system diagram of a dual-fuel gas turbine device provided according to the present invention.

[0023] In the diagram, 1-combustion chamber, 2-heating furnace, 3-heat source regenerator, 4-compressor, 5-gas turbine, 6-high temperature regenerator.

[0024] Regarding combustion chamber 1, heating furnace 2, low-grade fuel, and high-grade fuel, the following explanation is provided:

[0025] (1) Combustion chamber 1 and heating furnace 2:

[0026] ① Combustion chamber 1 is mainly used to generate the working medium of gas. If necessary, heat exchange tube bundles can be installed inside it to heat other media.

[0027] ②The heat source regenerator relates to the temperature grade of the combustion gas (i.e., high-temperature heat source) inside the heating furnace 2, and is listed separately.

[0028] ③ As needed, a heat exchanger (heat exchange tube bundle) is installed inside the heating furnace 2 to heat the working medium flowing through it, including a heat exchanger for heating the medium, an evaporator for heating and vaporizing, and a reheater for reheating the steam.

[0029] ④ Instead of specifying the specific heat exchange tube bundles involved when the circulating medium flows through the heating furnace and is heated and vaporized or reheated, the term "heating furnace" is used uniformly.

[0030] (2) Low-grade fuels and high-grade fuels:

[0031] ① Low-grade fuels: These refer to fuels whose combustion products can generate a relatively low maximum temperature (such as adiabatic combustion temperature or constant pressure combustion temperature); for example, coal gangue and coal slime are low-grade fuels compared to high-quality coal. From the perspective of heat source, low-grade fuels refer to fuels whose combustion products are difficult to generate a high-temperature heat source.

[0032] ② High-grade fuels: These refer to fuels whose combustion products can generate a relatively high maximum temperature (such as adiabatic combustion temperature or isobaric combustion temperature). For example, compared to fuels such as coal gangue and coal slime, high-quality coal, natural gas, methane, and hydrogen are all high-grade fuels. From the perspective of heat source, low-grade fuels refer to fuels whose combustion products can generate a high-temperature heat source.

[0033] ③ For solid fuels, the gaseous substances of combustion products are the core of the heat source and an important part of the thermal system; while the solid substances in the combustion products, such as waste residue, contain thermal energy that is utilized (the utilization process and equipment are included in the heating furnace, or the air is preheated outside the heating furnace body) and then discharged. They do not need to be listed separately, and their role is not described separately. Detailed implementation method:

[0034] First, it should be noted that the structure and process are not repeated unless necessary; obvious processes are not described. The invention will now be described in detail with reference to the accompanying drawings and examples.

[0035] Figure 1 The dual-fuel high-temperature heat source shown is implemented as follows:

[0036] (1) Structurally, it is mainly composed of a combustion chamber, a heating furnace and a heat source regenerator; there is a high-grade fuel channel connected to the heating furnace 2 externally, and an air channel connected to the heating furnace 2 via the heat source regenerator 3 externally. The heating furnace 2 also has a gas channel connected to the outside via the heat source regenerator 3. There is low-grade fuel connected to the combustion chamber 1 externally, and an air channel connected to the combustion chamber 1 externally. The combustion chamber 1 also has a gas channel connected to the outside via the heating furnace 2.

[0037] (2) In terms of process, the first external air flows through the heat source regenerator 3 to absorb heat and increase its temperature before entering the heating furnace 2 to participate in combustion. The high-grade external fuel enters the heating furnace 2, mixes with the air from the heat source regenerator 3, and burns into high-temperature gas. The gas generated by the heating furnace 2 releases heat from the gas produced in the combustion chamber 1 and flows through the heating furnace 2 and is cooled down. Then it flows through the heat source regenerator 3 to release heat and cool down, and then is discharged to the outside. The second external air enters the combustion chamber 1 to participate in combustion. The low-grade external fuel enters the combustion chamber 1. The low-grade fuel and air mix in the combustion chamber 1 and burn into high-temperature gas. This gas flows through the heating furnace 2 to absorb heat and increase its temperature before being supplied to the outside. The low-grade fuel through the combustion chamber 1 and the high-grade fuel through the heating furnace 2 provide heat loads to the high-temperature heat source, respectively. The gas formed in the combustion chamber 1 provides high-temperature heat loads to the outside, forming a dual-fuel high-temperature heat source.

[0038] Figure 2 The dual-fuel gas turbine unit shown is implemented as follows:

[0039] (1) Structurally, it is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor and a gas turbine; there is a high-grade fuel passage connected to the heating furnace 2, and an air passage connected to the heating furnace 2 via the heat source regenerator 3. The heating furnace 2 also has a gas passage connected to the outside via the heat source regenerator 3. There is low-grade fuel connected to the combustion chamber 1, and an air passage connected to the combustion chamber 1 via the compressor 4. The combustion chamber 1 also has a gas passage connected to the outside via the heating furnace 2 and the gas turbine 5. The gas turbine 5 is connected to the compressor 4 and transmits power.

[0040] (2) In terms of process, the first external air flows through the heat source regenerator 3 to absorb heat and increase its temperature before entering the heating furnace 2 to participate in combustion. The high-grade external fuel enters the heating furnace 2, mixes with the air from the heat source regenerator 3, and burns into high-temperature gas. The gas generated by the heating furnace 2 releases heat from the gas from the combustion chamber 1 and flows through the heating furnace 2 to cool down. Then it flows through the heat source regenerator 3 to release heat and cool down before being discharged to the outside. The second external air flows through the compressor 4 to increase its pressure and temperature before entering the combustion chamber 1 to participate in combustion. The low-grade external fuel enters the combustion chamber 1. The low-grade fuel and air mix in the combustion chamber 1 and burn into high-temperature gas. The gas produced by the combustion chamber 1 flows through the heating furnace 2 to absorb heat and increase its temperature. It flows through the gas turbine 5 to decrease its pressure and do work before being discharged to the outside. The low-grade fuel through the combustion chamber 1 and the high-grade fuel through the heating furnace 2 jointly provide the driving heat load. The air and gas carry away the low-temperature heat load through the inlet and outlet process. The power output of the gas turbine 5 provides power to the compressor 4 and the external gas, forming a dual-fuel gas turbine unit.

[0041] Figure 3 The dual-fuel gas turbine unit shown is implemented as follows:

[0042] (1) Structurally, it is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. There is a high-grade fuel channel connected to the heating furnace 2 externally, and an air channel connected to the heating furnace 2 via the heat source regenerator 3. The heating furnace 2 also has a gas channel connected to the outside via the heat source regenerator 3. There is low-grade fuel connected to the combustion chamber 1 externally, and an air channel connected to the combustion chamber 1 via the compressor 4 and the high-temperature regenerator 6. The combustion chamber 1 also has a gas channel connected to the gas turbine 5 via the heating furnace 2. The gas turbine 5 also has a gas channel connected to the outside via the high-temperature regenerator 6. The gas turbine 5 is connected to the compressor 4 and transmits power.

[0043] (2) In terms of process, the first external airflow passes through the heat source regenerator 3 to absorb heat and increase its temperature before entering the heating furnace 2 to participate in combustion. High-grade external fuel enters the heating furnace 2, mixes with the air from the heat source regenerator 3, and burns into high-temperature fuel gas. The fuel gas generated by the heating furnace 2 releases heat from the fuel gas from the combustion chamber 1 and flows through the heating furnace 2, thus cooling it down. It then flows through the heat source regenerator 3 to release heat and decrease its temperature before being discharged to the outside. The second external airflow passes through the compressor 4 to increase its pressure and temperature, passes through the high-temperature regenerator 6 to absorb heat and increase its temperature before entering the combustion chamber 1 to participate in combustion. Low-grade external fuel... Low-grade fuel enters combustion chamber 1, where low-grade fuel and air mix and burn to produce high-temperature gas. The gas produced in combustion chamber 1 flows through heater 2 to absorb heat and increase its temperature, then flows through gas turbine 5 to reduce pressure and perform work, and finally flows through high-temperature regenerator 6 to release heat and reduce its temperature before being discharged to the outside. Low-grade fuel and high-grade fuel together provide the driving heat load through combustion chamber 1 and heater 2. Air and gas carry away the low-temperature heat load through the inlet and outlet processes. The power output of gas turbine 5 is provided to compressor 4 and external power sources, forming a dual-fuel gas turbine unit.

[0044] Figure 4 The dual-fuel gas turbine unit shown is implemented as follows:

[0045] (1) Structurally, it is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. There is a high-grade fuel channel connected to the heating furnace 2 externally, and an air channel connected to the heating furnace 2 via the heat source regenerator 3. The heating furnace 2 also has a gas channel connected to the outside via the heat source regenerator 3. There is low-grade fuel connected to the combustion chamber 1 externally, and an air channel connected to the combustion chamber 1 via the compressor 4 externally. The combustion chamber 1 also has a gas channel connected to the gas turbine 5 via the high-temperature regenerator 6 and the heating furnace 2. The gas turbine 5 also has a gas channel connected to the outside via the high-temperature regenerator 6. The gas turbine 5 is connected to the compressor 4 and transmits power.

[0046] (2) In terms of process, the first external airflow passes through the heat source regenerator 3 to absorb heat and increase its temperature before entering the heating furnace 2 to participate in combustion. High-grade external fuel enters the heating furnace 2, mixes with the air from the heat source regenerator 3, and burns into high-temperature gas. The gas generated by the heating furnace 2 releases heat from the high-temperature regenerator 6 and flows through the heating furnace 2 to cool down. Then it flows through the heat source regenerator 3 to release heat and cool down before being discharged to the outside. The second external airflow passes through the compressor 4 to increase its pressure and temperature before entering the combustion chamber 1 to participate in combustion. Low-grade external fuel enters the combustion chamber 1. Low-grade fuel and air are mixed and burned in combustion chamber 1 to produce high-temperature gas. The gas produced in combustion chamber 1 flows through high-temperature regenerator 6 and heater 2 to gradually absorb heat and increase temperature. It then flows through gas turbine 5 to reduce pressure and do work, and flows through high-temperature regenerator 6 to release heat and decrease temperature before being discharged to the outside. Low-grade fuel through combustion chamber 1 and high-grade fuel through heater 2 jointly provide driving heat load. Air and gas carry away low-temperature heat load through the inlet and outlet process. The power output of gas turbine 5 is provided to compressor 4 and external power, forming a dual-fuel gas turbine unit.

[0047] Figure 5 The dual-fuel gas turbine unit shown is implemented as follows:

[0048] (1) Structurally, it is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. There is a high-grade fuel channel connected to the heating furnace 2, and an air channel connected to the heating furnace 2 via the heat source regenerator 3. The heating furnace 2 also has a gas channel connected to the outside via the heat source regenerator 3. There is low-grade fuel connected to the combustion chamber 1, and an air channel connected to the combustion chamber 1 via the compressor 4 and the high-temperature regenerator 6. The combustion chamber 1 also has a gas channel connected to the gas turbine 5 via the heating furnace 2. The gas turbine 5 then has a gas channel connected to itself via the high-temperature regenerator 6. The gas turbine 5 also has a gas channel connected to the outside. The gas turbine 5 is connected to the compressor 4 and transmits power.

[0049] (2) In terms of process, the first external airflow passes through the heat source regenerator 3 to absorb heat and increase its temperature before entering the heating furnace 2 to participate in combustion. High-grade external fuel enters the heating furnace 2, mixes with the air from the heat source regenerator 3, and burns into high-temperature fuel gas. The fuel gas generated by the heating furnace 2 releases heat from the fuel gas from the combustion chamber 1 and flows through the heating furnace 2 to cool down. Then it flows through the heat source regenerator 3 to release heat and cool down before being discharged to the outside. The second external airflow passes through the compressor 4 to increase its pressure and temperature, passes through the high-temperature regenerator 6 to absorb heat and increase its temperature before entering the combustion chamber 1 to participate in combustion. Low-grade external fuel enters the combustion chamber 1. Low-grade fuel and air are mixed and burned in combustion chamber 1 to produce high-temperature gas. The gas produced in combustion chamber 1 flows through heater 2 to absorb heat and increase its temperature. It then enters gas turbine 5 to reduce pressure and perform work. After reaching a certain level, it flows through high-temperature regenerator 6 to release heat and reduce its temperature. It then enters gas turbine 5 again to continue to reduce pressure and perform work before being discharged to the outside. Low-grade fuel through combustion chamber 1 and high-grade fuel through heater 2 jointly provide the driving heat load. Air and gas carry away the low-temperature heat load through the inlet and outlet processes. The power output of gas turbine 5 is provided to compressor 4 and external power sources, forming a dual-fuel gas turbine unit.

[0050] Figure 6 The dual-fuel gas turbine unit shown is implemented as follows:

[0051] (1) Structurally, it is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. There is a high-grade fuel channel connected to the heating furnace 2, and an air channel connected to the heating furnace 2 via the heat source regenerator 3. The heating furnace 2 also has a gas channel connected to the outside via the heat source regenerator 3. There is low-grade fuel connected to the combustion chamber 1, and an air channel connected to the combustion chamber 1 via the compressor 4. The combustion chamber 1 also has a gas channel connected to the gas turbine 5 via the high-temperature regenerator 6 and the heating furnace 2. The gas turbine 5 then has a gas channel connected to itself via the high-temperature regenerator 6. The gas turbine 5 also has a gas channel connected to the outside. The gas turbine 5 is connected to the compressor 4 and transmits power.

[0052] (2) In terms of process, the first external airflow passes through the heat source regenerator 3 to absorb heat and increase its temperature before entering the heating furnace 2 to participate in combustion. High-grade external fuel enters the heating furnace 2, mixes with the air from the heat source regenerator 3, and burns into high-temperature gas. The gas generated by the heating furnace 2 releases heat from the high-temperature regenerator 6 and flows through the heating furnace 2 to cool down. Then it flows through the heat source regenerator 3 to release heat and cool down before being discharged to the outside. The second external airflow passes through the compressor 4 to increase its pressure and temperature before entering the combustion chamber 1 to participate in combustion. Low-grade external fuel enters the combustion chamber 1, and the low-grade fuel and air burn together. The mixture is burned in combustion chamber 1 to produce high-temperature gas. The gas produced in combustion chamber 1 flows through high-temperature regenerator 6 and heater 2 to gradually absorb heat and increase its temperature. It then enters gas turbine 5 to reduce pressure and perform work. After reaching a certain level, it flows through high-temperature regenerator 6 to release heat and reduce its temperature. After that, it enters gas turbine 5 again to continue to reduce pressure and perform work and is discharged to the outside. Low-grade fuel through combustion chamber 1 and high-grade fuel through heater 2 jointly provide the driving heat load. Air and gas carry away the low-temperature heat load through the inlet and outlet processes. The power output of gas turbine 5 is provided to compressor 4 and external power, forming a dual-fuel gas turbine unit.

[0053] Figure 7 The dual-fuel gas turbine unit shown is implemented as follows:

[0054] (1) Structurally, it is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. There is a high-grade fuel channel connected to the heating furnace 2, and an air channel connected to the heating furnace 2 via the heat source regenerator 3. The heating furnace 2 also has a gas channel connected to the outside via the heat source regenerator 3. There is low-grade fuel connected to the combustion chamber 1. There is an air channel connected to the compressor 4. The compressor 4 then has an air channel connected to itself via the high-temperature regenerator 6. The compressor 4 also has an air channel connected to the combustion chamber 1. The combustion chamber 1 also has a gas channel connected to the gas turbine 5 via the heating furnace 2. The gas turbine 5 also has a gas channel connected to the outside via the high-temperature regenerator 6. The gas turbine 5 is connected to the compressor 4 and transmits power.

[0055] (2) In terms of process, the first external air flows through the heat source regenerator 3 to absorb heat and increase its temperature before entering the heating furnace 2 to participate in combustion. High-grade external fuel enters the heating furnace 2, mixes with the air from the heat source regenerator 3, and burns into high-temperature fuel gas. The fuel gas generated by the heating furnace 2 releases heat from the fuel gas from the combustion chamber 1 and flows through the heating furnace 2 to cool down. Then it flows through the heat source regenerator 3 to release heat and cool down before being discharged to the outside. The second external air enters the compressor 4 to increase its pressure and temperature to a certain level before flowing through the high-temperature regenerator 6 to absorb heat and increase its temperature. Then it enters the compressor 4 to continue to increase its pressure and temperature. The air discharged by the compressor 4... Air enters combustion chamber 1 to participate in combustion. Low-grade fuel from outside enters combustion chamber 1. The low-grade fuel and air mix and burn in combustion chamber 1 to form high-temperature gas. The gas produced in combustion chamber 1 flows through heater 2 to absorb heat and increase temperature, flows through gas turbine 5 to reduce pressure and do work, flows through high-temperature regenerator 6 to release heat and decrease temperature, and is then discharged to the outside. Low-grade fuel through combustion chamber 1 and high-grade fuel through heater 2 jointly provide driving heat load. Air and gas carry away low-temperature heat load through the inlet and outlet process. The power output of gas turbine 5 is provided to compressor 4 and external power, forming a dual-fuel gas turbine unit.

[0056] Figure 8 The dual-fuel gas turbine unit shown is implemented as follows:

[0057] (1) Structurally, it is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine, and a high-temperature regenerator. There is a high-grade fuel channel connected to the heating furnace 2 externally, and an air channel connected to the heating furnace 2 via the heat source regenerator 3. The heating furnace 2 also has a gas channel connected to the outside via the heat source regenerator 3. There is low-grade fuel connected to the combustion chamber 1 externally. There is an air channel connected to the compressor 4 externally, and then the compressor 4 has an air channel connected to itself via the high-temperature regenerator 6. The compressor 4 also has an air channel connected to the combustion chamber 1. The combustion chamber 1 also has a gas channel connected to the gas turbine 5 via the heating furnace 2. Then the gas turbine 5 has a gas channel connected to itself via the high-temperature regenerator 6. The gas turbine 5 also has a gas channel connected to the outside. The gas turbine 5 is connected to the compressor 4 and transmits power.

[0058] (2) In terms of process, the first external air flows through the heat source regenerator 3 to absorb heat and increase its temperature before entering the heating furnace 2 to participate in combustion. High-grade external fuel enters the heating furnace 2, mixes with the air from the heat source regenerator 3, and burns into high-temperature fuel gas. The fuel gas generated by the heating furnace 2 releases heat from the fuel gas from the combustion chamber 1 and flows through the heating furnace 2 to cool down. Then it flows through the heat source regenerator 3 to release heat and cool down before being discharged to the outside. The second external air enters the compressor 4 to increase its pressure and temperature to a certain level before flowing through the high-temperature regenerator 6 to absorb heat and increase its temperature. Then it enters the compressor 4 to continue to increase its pressure and temperature. The air discharged from the compressor 4 enters the combustion chamber 1 to participate in combustion. Low-grade fuel from the outside enters combustion chamber 1, where it mixes with air and burns to produce high-temperature gas. The gas produced in combustion chamber 1 flows through heater 2 to absorb heat and increase its temperature. It then enters gas turbine 5 to reduce its pressure and perform work. After reaching a certain level, it flows through high-temperature regenerator 6 to release heat and reduce its temperature. It then enters gas turbine 5 again to continue reducing its pressure and performing work before being discharged to the outside. Low-grade fuel from combustion chamber 1 and high-grade fuel from heater 2 jointly provide the driving heat load. Air and gas carry away the low-temperature heat load through the inlet and outlet processes. The power output from gas turbine 5 is provided to compressor 4 and external power sources, forming a dual-fuel gas turbine unit.

[0059] The effects achievable by this invention—the dual-fuel high-temperature heat source and dual-fuel gas turbine device proposed in this invention have the following effects and advantages:

[0060] (1) Reasonable combination and segmented construction effectively reduce the irreversible loss of temperature difference during the formation of high temperature heat source.

[0061] (2) Low-grade fuel and high-grade fuel together form a high-temperature heat source, which significantly improves the energy utilization value of low-grade fuel.

[0062] (3) Low-grade fuels are used to construct high-temperature heat sources, reducing the input of high-grade fuels and enhancing the utilization value of low-grade fuels.

[0063] (4) Reduce the irreversible temperature difference loss of high-grade fuel in the process of forming a high-temperature heat source, and enhance the utilization value of high-grade fuel in forming a high-temperature heat source.

[0064] (5) Reducing the system compression ratio is beneficial to increasing the flow rate of the circulating working fluid and to building a high-load gas turbine unit.

[0065] (6) Enhance the value of fuel utilization, reduce greenhouse gas emissions, reduce pollutant emissions, and achieve outstanding energy conservation and emission reduction benefits.

[0066] (7) The structure is simple and the process is reasonable; it can improve the range of fuel selection and use value, and reduce the energy consumption cost of gas turbine units.

Claims

1. A dual-fuel high-temperature heat source, mainly composed of a combustion chamber, a heating furnace and a heat source regenerator; externally, there is a high-grade fuel passage connected with the heating furnace (2), and there is also an air passage connected with the heating furnace (2) through the heat source regenerator (3), and the heating furnace (2) has a gas passage connected with the outside through the heat source regenerator (3), and externally, there is a low-grade fuel connected with the combustion chamber (1), and there is an air passage connected with the combustion chamber (1), and the combustion chamber (1) has a gas passage connected with the outside through the heating furnace (2), forming a dual-fuel high-temperature heat source.

2. A dual-fuel gas turbine device, mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor and a gas turbine; externally, there is a high-grade fuel passage connected with the heating furnace (2), and there is also an air passage connected with the heating furnace (2) through the heat source regenerator (3), and the heating furnace (2) has a gas passage connected with the outside through the heat source regenerator (3), and externally, there is a low-grade fuel connected with the combustion chamber (1), and there is an air passage connected with the combustion chamber (1) through the compressor (4), and the combustion chamber (1) has a gas passage connected with the outside through the heating furnace (2) and the gas turbine (5); the gas turbine (5) is connected with the compressor (4) and transmits power, forming a dual-fuel gas turbine device.

3. A dual-fuel gas turbine device, mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine and a high-temperature regenerator; externally, there is a high-grade fuel passage connected with the heating furnace (2), and there is also an air passage connected with the heating furnace (2) through the heat source regenerator (3), and the heating furnace (2) has a gas passage connected with the outside through the heat source regenerator (3), and externally, there is a low-grade fuel connected with the combustion chamber (1), and there is an air passage connected with the combustion chamber (1) through the compressor (4) and the high-temperature regenerator (6), and the combustion chamber (1) has a gas passage connected with the gas turbine (5) through the heating furnace (2), and the gas turbine (5) has a gas passage connected with the outside through the high-temperature regenerator (6); the gas turbine (5) is connected with the compressor (4) and transmits power, forming a dual-fuel gas turbine device.

4. A dual-fuel gas turbine device, mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine and a high-temperature regenerator; externally, there is a high-grade fuel passage connected with the heating furnace (2), and there is also an air passage connected with the heating furnace (2) through the heat source regenerator (3), and the heating furnace (2) has a gas passage connected with the outside through the heat source regenerator (3), and externally, there is a low-grade fuel connected with the combustion chamber (1), and there is an air passage connected with the combustion chamber (1) through the compressor (4), and the combustion chamber (1) has a gas passage connected with the gas turbine (5) through the high-temperature regenerator (6) and the heating furnace (2), and the gas turbine (5) has a gas passage connected with the outside through the high-temperature regenerator (6); the gas turbine (5) is connected with the compressor (4) and transmits power, forming a dual-fuel gas turbine device.

5. The dual fuel gas turbine device is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine and a high temperature regenerator; externally, there is a high-grade fuel passage connected with the heating furnace (2), and there is also an air passage connected with the heating furnace (2) through the heat source regenerator (3), the heating furnace (2) also has a gas passage connected with the outside through the heat source regenerator (3), externally, there is low-grade fuel connected with the combustion chamber (1), and there is an air passage connected with the combustion chamber (1) through the compressor (4) and the high temperature regenerator (6), the combustion chamber (1) also has a gas passage connected with the gas turbine (5) through the heating furnace (2), and then the gas turbine (5) has a gas passage connected with itself through the high temperature regenerator (6), and the gas turbine (5) also has a gas passage connected with the outside; the gas turbine (5) is connected with the compressor (4) and transmits power, forming the dual fuel gas turbine device.

6. The dual fuel gas turbine device is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine and a high temperature regenerator; externally, there is a high-grade fuel passage connected with the heating furnace (2), and there is also an air passage connected with the heating furnace (2) through the heat source regenerator (3), the heating furnace (2) also has a gas passage connected with the outside through the heat source regenerator (3), externally, there is low-grade fuel connected with the combustion chamber (1), and there is an air passage connected with the combustion chamber (1) through the compressor (4), the combustion chamber (1) also has a gas passage connected with the gas turbine (5) through the high temperature regenerator (6) and the heating furnace (2), and then the gas turbine (5) has a gas passage connected with itself through the high temperature regenerator (6), and the gas turbine (5) also has a gas passage connected with the outside; the gas turbine (5) is connected with the compressor (4) and transmits power, forming the dual fuel gas turbine device.

7. The dual fuel gas turbine device is mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine and a high temperature regenerator; externally, there is a high-grade fuel passage connected with the heating furnace (2), and there is also an air passage connected with the heating furnace (2) through the heat source regenerator (3), the heating furnace (2) also has a gas passage connected with the outside through the heat source regenerator (3), externally, there is low-grade fuel connected with the combustion chamber (1), and there is an air passage connected with the compressor (4) and then the compressor (4) has an air passage connected with itself through the high temperature regenerator (6), the compressor (4) also has an air passage connected with the combustion chamber (1), the combustion chamber (1) also has a gas passage connected with the gas turbine (5) through the heating furnace (2), and the gas turbine (5) also has a gas passage connected with the outside through the high temperature regenerator (6); the gas turbine (5) is connected with the compressor (4) and transmits power, forming the dual fuel gas turbine device.

8. A dual fuel gas turbine device, mainly composed of a combustion chamber, a heating furnace, a heat source regenerator, a compressor, a gas turbine and a high temperature regenerator; externally having a high grade fuel channel communicating with the heating furnace (2), externally having an air channel communicating with the heating furnace (2) through the heat source regenerator (3), the heating furnace (2) having a gas channel communicating with the outside through the heat source regenerator (3), externally having a low grade fuel communicating with the combustion chamber (1), externally having an air channel communicating with the compressor (4), the compressor (4) having an air channel communicating with itself through the high temperature regenerator (6) after the air channel communicates with the compressor (4), the compressor (4) having an air channel communicating with the combustion chamber (1), the combustion chamber (1) having a gas channel communicating with the gas turbine (5) through the heating furnace (2), the gas turbine (5) having a gas channel communicating with itself through the high temperature regenerator (6) after the gas channel communicates with the gas turbine (5), the gas turbine (5) having a gas channel communicating with the outside; the gas turbine (5) connecting the compressor (4) and transmitting power, forming the dual fuel gas turbine device.

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