WO2022148329A1 - Dual-fuel gas-steam combined cycle power equipment - Google Patents

Abstract

The invention provides dual-fuel gas-steam combined cycle power equipment and relates to the technical field of thermodynamics and thermal power. Externally, a low-grade fuel is in communication with an air heating furnace. Also externally, a high-grade fuel channel is in communication with a combustion chamber. Also externally, an air channel is in communication with the air heating furnace via a heat source regenerator. The air heating furnace also is provided with a gas channel in communication with the external environment via the heat source regenerator. Externally, the air channel is in communication with the combustion chamber via a compressor and the air heating furnace. The combustion chamber also is provided with a gas channel in communication with a gas turbine. The gas turbine also is provided with a gas channel in communication with the external environment via a high-temperature heat exchanger. A condenser is provided with a condensate pipe in communication with the high-temperature heat exchanger via a booster pump and the high-temperature heat exchanger in turn is in communication with a steam turbine via a steam channel. The steam turbine also is provided with a low-pressure steam channel in communication with the condenser. The condenser also is provided with a cooling medium channel in communication with the external environment. The gas turbine is connected to the compressor and transfers power. This forms the dual-fuel gas-steam combined cycle power equipment.

Description

Dual fuel gas-steam combined cycle power plant Technical field:

The invention belongs to the technical field of thermodynamics and thermodynamics.

Background technique:

Cold demand, heat demand and power demand are common in human life and production; among them, the chemical energy of high-quality fuel is converted into thermal energy through combustion, and then the thermal energy is efficiently converted into mechanical energy through a gas-steam power plant. An important means for humans to provide power or electricity.

There are different types of fuels and different properties. The temperature of the gas formed by the combustion of the fuel directly determines the thermal power conversion efficiency; from the temperature of the gas formed by combustion (such as the combustion temperature at constant pressure) High-grade fuels correspond to high-grade heat sources, which can convert more mechanical energy; while low-grade fuels with low constant-pressure combustion temperatures are difficult to form high-temperature combustion products, corresponding to low-grade heat sources—relative to the former, less mechanical energy can be converted.

In conventional gas-steam power plants, the gasoline, diesel, natural gas and other fuels used are high-quality and high-grade fuels; due to the limitation of working principle or material properties or equipment manufacturing level, the high-quality and high-grade fuels form high temperature During the combustion process of the heat source, the difference between the temperature of the combustion-supporting medium (such as air) and the combustion temperature of the fuel at constant pressure is large, and there is a large irreversible loss of the temperature difference in the combustion process, which leads to the loss of mass in the utilization of the fuel - however, this is low. The opportunity for grade fuels to participate in the construction of heat sources.

People need simple, active, safe and efficient use of fuel to obtain power. The present invention provides the rational use of low-grade fuel and high-grade fuel to achieve learning from each other's strengths and complement each other's advantages, and greatly improve the thermal power conversion efficiency of low-grade fuel. A dual-fuel gas-steam combined cycle power plant that reduces greenhouse gas emissions and effectively reduces fuel costs.

Invention content:

The main purpose of the present invention is to provide a dual-fuel gas-steam combined cycle power plant, and the specific content of the invention is explained as follows:

1. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber and a heat source regenerator; The high-grade fuel is communicated with the air heating furnace, the external high-grade fuel channel is communicated with the combustion chamber, the external air channel is communicated with the air heating furnace through the heat source regenerator, and the air heating furnace has a gas channel connected with the outside through the heat source regenerator. The external air channel is connected to the combustion chamber through the compressor and the air heating furnace, the combustion chamber and the gas channel are connected to the gas turbine, and the gas turbine and the gas channel are connected to the outside through the high temperature heat exchanger; the condenser has a condensate pipeline through the After the booster pump is connected to the high-temperature heat exchanger, the high-temperature heat exchanger has a steam passage that communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser; the condenser also has a cooling medium passage that communicates with the outside, and the gas turbine is connected to the compressor and transmits power to form a dual-fuel gas-steam combined cycle power plant.

2. Dual fuel gas-steam combined cycle power plant, mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, gas turbine, air heating furnace, combustion chamber, heat source regenerator and high temperature regenerator. Composition; external low-grade fuel communicates with the air heating furnace, external high-grade fuel channel communicates with the combustion chamber, external air channel communicates with the air heating furnace through the heat source regenerator, and the air heating furnace also has a gas channel through the heat source. The regenerator is communicated with the outside, and the outside has an air passage that communicates with the combustion chamber through the compressor, the high-temperature regenerator and the air heating furnace. The combustion chamber also has a gas channel that communicates with the gas turbine. The heat exchanger is communicated with the outside; the condenser has a condensate pipeline that is connected to the high-temperature heat exchanger via a booster pump, and then the high-temperature heat exchanger has a steam passage that communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser; the condenser There is also a cooling medium channel that communicates with the outside, and the gas turbine is connected to the compressor and transmits power to form a dual-fuel gas-steam combined cycle power plant.

3. Dual-fuel gas-steam combined cycle power plant, mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, gas turbine, air heating furnace, combustion chamber, heat source regenerator and high temperature regenerator. Composition; external low-grade fuel communicates with the air heating furnace, external high-grade fuel channel communicates with the combustion chamber, external air channel communicates with the air heating furnace through the heat source regenerator, and the air heating furnace also has a gas channel through the heat source. The regenerator is communicated with the outside, and the outside has an air channel that communicates with the combustion chamber through the compressor, the air heating furnace and the high-temperature regenerator, and the combustion chamber also has a gas channel that communicates with the gas turbine. The heat exchanger is communicated with the outside; the condenser has a condensate pipeline that is connected to the high-temperature heat exchanger via a booster pump, and then the high-temperature heat exchanger has a steam passage that communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser; the condenser There is also a cooling medium channel that communicates with the outside, and the gas turbine is connected to the compressor and transmits power to form a dual-fuel gas-steam combined cycle power plant.

4. Dual-fuel gas-steam combined cycle power plant, mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, gas turbine, air heating furnace, combustion chamber, heat source regenerator and high temperature regenerator. Composition; external low-grade fuel communicates with the air heating furnace, external high-grade fuel channel communicates with the combustion chamber, external air channel communicates with the air heating furnace through the heat source regenerator, and the air heating furnace also has a gas channel through the heat source. The regenerator communicates with the outside, and there is an air channel outside that communicates with the compressor. After that, the compressor has an air channel that communicates with itself through the high-temperature regenerator. The compressor also has an air channel that communicates with the combustion chamber through the air heating furnace. The combustion chamber also has The gas channel is connected with the gas turbine, and the gas turbine and the gas channel are connected with the outside through the high temperature regenerator and the high temperature heat exchanger; the condenser has a condensate pipeline connected with the high temperature heat exchanger through the booster pump, and then the high temperature heat exchanger has steam. The passage communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser; the condenser and a cooling medium passage communicate with the outside, and the gas turbine is connected to the compressor and transmits power to form a dual-fuel gas-steam combined cycle power plant.

5. Dual-fuel gas-steam combined cycle power plant, mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, gas turbine, air heating furnace, combustion chamber, heat source regenerator and high temperature regenerator. Composition; external low-grade fuel communicates with the air heating furnace, external high-grade fuel channel communicates with the combustion chamber, external air channel communicates with the air heating furnace through the heat source regenerator, and the air heating furnace also has a gas channel through the heat source. The regenerator is communicated with the outside, and there is an external air channel that is connected to the combustion chamber through the compressor, the high-temperature regenerator and the air heating furnace, and the combustion chamber also has a gas channel that communicates with the gas turbine. The gas turbine and the gas channel are connected with the outside through the high temperature heat exchanger; the condenser has a condensate pipeline connected with the high temperature heat exchanger through the booster pump, and then the high temperature heat exchanger has a steam channel connected with the steam turbine, and the steam turbine also has a low pressure The steam channel is communicated with the condenser; the condenser and the cooling medium channel are communicated with the outside, and the gas turbine is connected to the compressor and transmits power to form a dual-fuel gas-steam combined cycle power plant.

6. Dual-fuel gas-steam combined cycle power plant, mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, gas turbine, air heating furnace, combustion chamber, heat source regenerator and high temperature regenerator. Composition; external low-grade fuel communicates with the air heating furnace, external high-grade fuel channel communicates with the combustion chamber, external air channel communicates with the air heating furnace through the heat source regenerator, and the air heating furnace also has a gas channel through the heat source. The regenerator is communicated with the outside, and there is an air channel on the outside that communicates with the combustion chamber through the compressor, the air heating furnace and the high temperature regenerator, and the combustion chamber also has a gas channel that communicates with the gas turbine. The gas turbine and the gas channel are connected with the outside through the high temperature heat exchanger; the condenser has a condensate pipeline connected with the high temperature heat exchanger through the booster pump, and then the high temperature heat exchanger has a steam channel connected with the steam turbine, and the steam turbine also has a low pressure The steam channel is communicated with the condenser; the condenser and the cooling medium channel are communicated with the outside, and the gas turbine is connected to the compressor and transmits power to form a dual-fuel gas-steam combined cycle power plant.

7. Dual-fuel gas-steam combined cycle power plant, mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, gas turbine, air heating furnace, combustion chamber, heat source regenerator and high temperature regenerator. Composition; external low-grade fuel communicates with the air heating furnace, external high-grade fuel channel communicates with the combustion chamber, external air channel communicates with the air heating furnace through the heat source regenerator, and the air heating furnace also has a gas channel through the heat source. The regenerator communicates with the outside, and there is an air channel outside that communicates with the compressor. After that, the compressor has an air channel that communicates with itself through the high-temperature regenerator. The compressor also has an air channel that communicates with the combustion chamber through the air heating furnace. The combustion chamber also has After the gas channel is connected with the gas turbine, the gas turbine has a gas channel that communicates with itself through the high-temperature regenerator, and the gas turbine and the gas channel communicate with the outside through the high-temperature heat exchanger; the condenser has a condensate pipeline through the booster pump and the high-temperature heat exchanger. After the connection, the high-temperature heat exchanger has a steam passage that communicates with the steam turbine, the steam turbine also has a low-pressure steam passage that communicates with the condenser; the condenser and a cooling medium passage communicate with the outside, and the gas turbine is connected to the compressor and transmits power to form dual-fuel gas-steam. Combined cycle power plant.

8. Dual-fuel gas-steam combined cycle power plant, in any of the dual-fuel gas-steam combined cycle power plants described in items 1-7, the high-temperature heat exchanger has a steam passage to communicate with the steam turbine and is adjusted to The high temperature heat exchanger has a steam passage connected with the steam turbine through the air heating furnace to form a dual-fuel gas-steam combined cycle power plant.

9. Dual-fuel gas-steam combined cycle power plant, in any of the dual-fuel gas-steam combined cycle power plants described in items 1-7, the high-temperature heat exchanger has a steam passage connected with the steam turbine and is adjusted to be The high-temperature heat exchanger has a steam channel that communicates with the steam turbine, and then the steam turbine has a steam channel to communicate with itself through the air heating furnace to form a dual-fuel gas-steam combined cycle power plant.

10. The dual-fuel gas-steam combined cycle power plant is any one of the dual-fuel gas-steam combined cycle power plants described in items 1-9, adding a second booster pump and a low-temperature regenerator to replace the The condenser has a condensate pipeline that communicates with the booster pump and is adjusted so that the condenser has a condensate pipeline that communicates with the low-temperature regenerator through the second booster pump. Then a condensate pipeline is connected with the booster pump to form a dual-fuel gas-steam combined cycle power plant.

11. Dual-fuel gas-steam combined cycle power plant, in any of the dual-fuel gas-steam combined cycle power plants described in items 1-9, adding an expansion speed-up machine and replacing a steam turbine, adding a diffuser pipe And replace the booster pump to form a dual-fuel gas-steam combined cycle power plant.

12. Dual-fuel gas-steam combined cycle power plant, in any of the dual-fuel gas-steam combined cycle power plants described in item 10, adding an expansion speed increaser and replacing a steam turbine, adding a diffuser pipe and replacing it Booster pump, adding a second diffuser pipe to replace the second booster pump to form a dual-fuel gas-steam combined cycle power plant.

13. Dual fuel gas-steam combined cycle power plant, mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, gas turbine, primary combustion chamber and combustion chamber; external low-grade fuel passage and primary combustion chamber The combustion chamber is connected, the external high-grade fuel channel is connected to the combustion chamber, and the external air channel is connected to the compressor and then divided into two paths - the first path is connected to the primary combustion chamber, and the second path is connected to the primary combustion chamber and the combustion chamber. The primary combustion chamber and the primary gas channel are connected to the combustion chamber, and the combustion chamber and the gas channel are connected to the outside through the gas turbine and the high temperature heat exchanger; the condenser has a condensate pipeline connected to the high temperature heat exchanger through the booster pump. The high-temperature heat exchanger has a steam passage that communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser; the condenser also has a cooling medium passage that communicates with the outside, and the gas turbine is connected to the compressor and transmits power to form a dual-fuel gas-steam combined cycle powerplant.

14. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, a gas turbine, a primary combustion chamber and a combustion chamber; there are low-grade fuel channels and primary combustion chambers outside The combustion chamber is connected, the external high-grade fuel channel is connected to the combustion chamber, the external air channel is connected to the primary combustion chamber through the compressor, the primary combustion chamber and the primary gas channel are connected to the combustion chamber, and the combustion chamber and the gas channel are connected to the combustion chamber. The gas turbine and the high-temperature heat exchanger are connected to the outside; the condenser has a condensate pipeline that is connected to the high-temperature heat exchanger through a booster pump, and then the high-temperature heat exchanger has a steam channel that communicates with the steam turbine, and the steam turbine also has a low-pressure steam channel that communicates with the condenser. ; The condenser and the cooling medium channel are communicated with the outside, and the gas turbine is connected to the compressor and transmits power to form a dual-fuel gas-steam combined cycle power plant.

Description of drawings:

Figure 1/14 is a first principle thermodynamic system diagram of a dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Figure 2/14 is a second principle thermodynamic system diagram of a dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Figure 3/14 is a third principle thermodynamic system diagram of a dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Figure 4/14 is a fourth principle thermodynamic system diagram of a dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Fig. 5/14 is the fifth principle thermodynamic system diagram of the dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Fig. 6/14 is a sixth principle thermodynamic system diagram of a dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Fig. 7/14 is the seventh principle thermodynamic system diagram of the dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Fig. 8/14 is the eighth principle thermodynamic system diagram of the dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Fig. 9/14 is the ninth principle thermodynamic system diagram of the dual-fuel gas-steam combined cycle power plant provided according to the present invention.

10/14 is a tenth principle thermodynamic system diagram of a dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Fig. 11/14 is an eleventh principle thermodynamic system diagram of a dual-fuel gas-steam combined cycle power plant provided according to the present invention.

Fig. 12/14 is a twelfth principle thermodynamic system diagram of a dual-fuel gas-steam combined cycle power plant provided according to the present invention.

13/14 are diagrams of the 13th principle thermodynamic system of the dual-fuel gas-steam combined cycle power plant provided according to the present invention.

14/14 are diagrams of the fourteenth principle thermodynamic system of a dual-fuel gas-steam combined cycle power plant provided according to the present invention.

In the figure, 1-steam turbine, 2-boost pump, 3-high temperature heat exchanger, 4-condenser, 5-compressor, 6-gas turbine, 7-air heating furnace, 8-combustion chamber, 9-heat source recuperation 10-high temperature regenerator, 11-second booster pump, 12-low temperature regenerator, 13-expansion speed-up machine, 14-diffuser, 15-second diffuser, 16-initial combustion chamber .

Here is a brief description of the expansion speed increaser, air heating furnace, heat source regenerator, low-grade fuel and high-grade fuel:

(1) In order to reveal the difference in the work flow between the steam turbine 1 and the expansion speed increaser 13, the following explanations are made here:

①In Figure 1, steam flows through steam turbine 1 to achieve thermal power conversion. The steam at the outlet of steam turbine 1 has a very low pressure and a small flow rate (corresponding to a small kinetic energy), and the mechanical energy required by the booster pump 2 can be transmitted by the steam turbine 1 or by the mechanical transmission. Provided externally.

② In contrast, in Fig. 11/14, the steam at the outlet of the expansion speed-up machine 13 also has a very low pressure, but the flow rate is relatively large (a part of the pressure drop is converted into the kinetic energy of the low-pressure steam) to meet the speed reduction of the diffuser pipe 14. Boost needs.

③ For the process of steam flowing through the steam turbine 1 to realize thermal power conversion in Figure 1/14, "depressurization to work" is used, and for the process of steam flowing through the expansion speed increaser 13 to realize thermal power conversion in Figure 11/14, "depressurization" is adopted. work and increase speed”.

(2) Instructions on air heating furnace and heat source regenerator:

① In the application of the present invention, the air heating furnace 7 undertakes the task of heating the air entering the second-stage combustion chamber 8, and at the same time provides part of the high-temperature driving heat load for the power plant; in some cases, the air heating furnace 7 also undertakes the bottom Rankine cycle. Subsystem circulates steam for heating tasks.

②As required, relevant heat exchangers (heat exchange tube bundles) are installed inside the air heating furnace; for example, the superheater for heating the steam from the high temperature heat exchanger 3 in Fig. The steam is heated by the reheater.

③ The specific heat exchange tube bundle (superheater or reheater) is not specified, but the air heating furnace is uniformly expressed.

④The heat source regenerator refers to the temperature grade of the gas in the air heating furnace, which is listed separately.

(3) Instructions on fuel:

①Low-grade fuel: refers to the fuel with the highest temperature (such as adiabatic combustion temperature or constant pressure combustion temperature) that can be formed by combustion products, such as coal gangue, coal slime, combustible garbage, etc. From the concept of heat source, low-grade fuel refers to fuel whose combustion products are difficult to form a high-temperature heat source with higher temperature.

②High-grade fuel: refers to the fuel with relatively high highest temperature (such as adiabatic combustion temperature or constant pressure combustion temperature) that can be formed by combustion products, such as high-quality coal, natural gas, methane, hydrogen, etc. From the concept of heat source, high-grade fuel refers to fuel whose combustion products can form a high-temperature heat source with higher temperature.

③ For solid fuels, the gaseous substances of the combustion products are the core of the heat source and are an important part of the thermal system; while the solid substances in the combustion products, such as waste residue, the heat energy contained in them is utilized (the utilization process and equipment are included in the In the boiler, or after preheating air outside the boiler body), it is not required to be listed separately, and its function is not described separately.

④Limited by the current technical conditions or material properties, especially for fuels that need to provide the circulating working fluid with high-temperature heat load through indirect means, their grades should be based on the highest temperature that the combustion products can form minus the indirect fuel. It is divided by the temperature after the heat transfer temperature difference; or, it can be divided by the temperature that the circulating working fluid can reach under the current technical conditions - the higher temperature that the circulating working fluid (working medium) can reach is the high grade. Fuel, the lower temperature that the circulating working fluid (working medium) can reach is the low-grade fuel.

Detailed ways:

The first thing to note is that in the presentation of the structure and process, it will not be repeated unless it is necessary; the obvious process will not be described. The present invention will be described in detail below with reference to the accompanying drawings and examples.

The dual-fuel gas-steam combined cycle power plant shown in Figure 1/14 is implemented as follows:

(1) Structurally, it is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber and a heat source regenerator; there are low-grade fuel and air heating outside The furnace 7 is communicated with, and the external high-grade fuel channel is communicated with the combustion chamber 8, and the external air channel is communicated with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source regenerator 9. External communication, external air passages are communicated with the combustion chamber 8 through the compressor 5 and the air heating furnace 7, the combustion chamber 8 also has a gas passage and is communicated with the gas turbine 6, and the gas turbine 6 also has a gas passage communicated with the outside through the high temperature heat exchanger 3; The condenser 4 has a condensate pipeline that is communicated with the high-temperature heat exchanger 3 via the booster pump 2, and then the high-temperature heat exchanger 3 has a steam passage that communicates with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage that communicates with the condenser 4; the condenser 4 and a cooling medium passage communicated with the outside, and the gas turbine 6 is connected to the compressor 5 and transmits power.

(2) In the process, the external low-grade fuel enters the air heating furnace 7, the first external air flows through the heat source regenerator 9 and enters the air heating furnace 7 after absorbing heat and heating up, and the low-grade fuel and air are mixed in the air heating furnace 7 And burn into high temperature gas, the gas in the air heating furnace 7 releases heat to the compressed air flowing through it and cools down, and then flows through the heat source regenerator 9 to release heat to cool down and discharge to the outside; The compressor 5 boosts the pressure and heats up, flows through the air heating furnace 7 to absorb heat and heat up, and then enters the combustion chamber 8; the external high-grade fuel enters the combustion chamber 8, mixes with the compressed air from the air heating furnace 7 and burns into high temperature and high pressure gas; combustion The high-temperature and high-pressure gas generated in the chamber 8 flows through the gas turbine 6 to depressurize and perform work, flows through the high-temperature heat exchanger 3 to release heat and cool down, and then discharges to the outside; The heat exchanger 3 heats up, vaporizes and superheats, the steam discharged from the high-temperature heat exchanger 3 flows through the steam turbine 1 to depressurize, and the low-pressure steam discharged from the steam turbine 1 enters the condenser 4 to release heat and condense; the low-grade fuel passes through the air heating furnace 7 and high-grade fuel jointly provide the driving heat load through the combustion chamber 8, the cooling medium takes away the low-temperature heat load through the condenser 4, and the air and gas take away the low-temperature heat load through the in-out process; the work output by the steam turbine 1 and the gas turbine 6 is provided to the compressor. The engine 5 and the external power, or the work output by the steam turbine 1 and the gas turbine 6 provide the booster pump 2, the compressor 5 and the external power to form a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Fig. 2/14 is implemented as follows:

(1) Structurally, it is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The high-grade fuel is communicated with the air heating furnace 7, the external high-grade fuel channel is communicated with the combustion chamber 8, and the external air channel is communicated with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source. The regenerator 9 is communicated with the outside, and the outside has an air passage that communicates with the combustion chamber 8 through the compressor 5, the high temperature regenerator 10 and the air heating furnace 7, and the combustion chamber 8 also has a gas passage that communicates with the gas turbine 6, and the gas turbine 6 also has gas. The passage is communicated with the outside through the high temperature regenerator 10 and the high temperature heat exchanger 3; the condenser 4 has a condensate pipeline connected with the high temperature heat exchanger 3 through the booster pump 2, and then the high temperature heat exchanger 3 has a steam passage and the steam turbine 1. The steam turbine 1 also has a low-pressure steam channel that communicates with the condenser 4; the condenser 4 also has a cooling medium channel that communicates with the outside, and the gas turbine 6 is connected to the compressor 5 and transmits power.

(2) In terms of the process, compared with the dual-fuel gas-steam combined cycle power plant shown in FIG. 1 , the difference is: the external second air flows through the compressor 5 to increase the pressure and temperature, and flows through the high-temperature regenerator 10 and the air heating furnace 7 gradually absorb heat and heat up, and then enter the combustion chamber 8; the external high-grade fuel enters the combustion chamber 8, mixes with the compressed air from the air heating furnace 7 and burns into high temperature and high pressure gas; the high temperature and high pressure gas generated by the combustion chamber 8 It flows through the gas turbine 6 to depressurize the power, and then flows through the high-temperature regenerator 10 and the high-temperature heat exchanger 3 to gradually release heat to cool down, and then discharge to the outside to form a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Figure 3/14 is implemented as follows:

(1) Structurally, it is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The high-grade fuel is communicated with the air heating furnace 7, the external high-grade fuel channel is communicated with the combustion chamber 8, and the external air channel is communicated with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source. The regenerator 9 is communicated with the outside, and the outside has an air passage that communicates with the combustion chamber 8 through the compressor 5, the air heating furnace 7 and the high temperature regenerator 10. The combustion chamber 8 also has a gas passage that communicates with the gas turbine 6, and the gas turbine 6 also has gas The passage is communicated with the outside through the high temperature regenerator 10 and the high temperature heat exchanger 3; the condenser 4 has a condensate pipeline connected with the high temperature heat exchanger 3 through the booster pump 2, and then the high temperature heat exchanger 3 has a steam passage and the steam turbine 1. The steam turbine 1 also has a low-pressure steam channel that communicates with the condenser 4; the condenser 4 also has a cooling medium channel that communicates with the outside, and the gas turbine 6 is connected to the compressor 5 and transmits power.

(2) In terms of the process, compared with the dual-fuel gas-steam combined cycle power plant shown in FIG. 1, the difference is: the external second air flows through the compressor 5 to increase the pressure and heat up, and flows through the air heating furnace 7 and the air heating furnace. The high temperature regenerator 10 gradually absorbs heat and heats up, and then enters the combustion chamber 8; the external high-grade fuel enters the combustion chamber 8, is mixed with the compressed air from the high temperature regenerator 10 and burns into high temperature and high pressure gas; the high temperature and high pressure generated by the combustion chamber 8 The gas flows through the gas turbine 6 to depressurize, and then flows through the high-temperature regenerator 10 and the high-temperature heat exchanger 3 to gradually release heat to cool down, and then discharge to the outside to form a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Fig. 4/14 is implemented as follows:

(1) Structurally, it is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The high-grade fuel is communicated with the air heating furnace 7, the external high-grade fuel channel is communicated with the combustion chamber 8, and the external air channel is communicated with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source. The regenerator 9 is communicated with the outside, and there is an air channel outside that communicates with the compressor 5. After the compressor 5 has an air channel that communicates with itself through the high temperature regenerator 10, the compressor 5 also has an air channel that communicates with the combustion chamber through the air heating furnace 7. 8 is connected, and the combustion chamber 8 also has a gas channel to communicate with the gas turbine 6, and the gas turbine 6 also has a gas channel to communicate with the outside through the high temperature regenerator 10 and the high temperature heat exchanger 3; the condenser 4 has a condensate pipeline through the booster pump 2. After being communicated with the high-temperature heat exchanger 3, the high-temperature heat exchanger 3 has a steam passage that communicates with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage that communicates with the condenser 4; the condenser 4 also has a cooling medium passage that communicates with the outside, and the gas turbine 6 is connected Compressor 5 and transmit power.

(2) In the process, compared with the dual-fuel gas-steam combined cycle power plant shown in Figure 1, the difference is: the external second air enters the compressor 5 to be boosted and heated to a certain degree, and then flows through the high-temperature recuperation The device 10 absorbs heat and heats up, and then enters the compressor 5 to continue to increase the pressure and heat up; the high-pressure air discharged from the compressor 5 flows through the air heating furnace 7 to absorb heat and heat up, and then enters the combustion chamber 8; the external high-grade fuel enters the combustion chamber 8, and the The compressed air from the air heating furnace 7 is mixed and burned into high-temperature and high-pressure gas; the high-temperature and high-pressure gas generated in the combustion chamber 8 flows through the gas turbine 6 to depressurize and perform work, and flows through the high-temperature regenerator 10 and the high-temperature heat exchanger 3 to gradually release heat and cool down. , and then discharged to the outside to form a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Figure 5/14 is implemented as follows:

(1) Structurally, it is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The high-grade fuel is communicated with the air heating furnace 7, the external high-grade fuel channel is communicated with the combustion chamber 8, and the external air channel is communicated with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source. The regenerator 9 is communicated with the outside, and there is an air passage outside, which is communicated with the combustion chamber 8 through the compressor 5, the high temperature regenerator 10 and the air heating furnace 7, and the combustion chamber 8 also has a gas passage that is communicated with the gas turbine 6. After that, the gas turbine 6 has gas again. The channel is communicated with itself through the high temperature regenerator 10, the gas turbine 6 and the gas channel are communicated with the outside through the high temperature heat exchanger 3; The exchanger 3 has a steam passage communicating with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage communicating with the condenser 4; the condenser 4 also has a cooling medium passage communicating with the outside, and the gas turbine 6 is connected to the compressor 5 and transmits power.

(2) In terms of the process, compared with the dual-fuel gas-steam combined cycle power plant shown in FIG. 1 , the difference is: the external second air flows through the compressor 5 to increase the pressure and temperature, and flows through the high-temperature regenerator 10 and the air heating furnace 7 gradually absorb heat and heat up, and then enter the combustion chamber 8; the external high-grade fuel enters the combustion chamber 8, mixes with the compressed air from the air heating furnace 7 and burns into high temperature and high pressure gas; the high temperature and high pressure gas generated by the combustion chamber 8 After entering the gas turbine 6 to depressurize the work to a certain extent, it flows through the high-temperature regenerator 10 to release heat and cool down, and then enters the gas turbine 6 to continue to depressurize and perform work; the gas discharged from the gas turbine 6 flows through the high-temperature heat exchanger 3 to release heat and cool down, and then externally emissions to form a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Figure 6/14 is implemented as follows:

(1) Structurally, it is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The high-grade fuel is communicated with the air heating furnace 7, the external high-grade fuel channel is communicated with the combustion chamber 8, and the external air channel is communicated with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source. The regenerator 9 is communicated with the outside, and there is an air passage outside, which is communicated with the combustion chamber 8 through the compressor 5, the air heating furnace 7 and the high temperature regenerator 10, and the combustion chamber 8 also has a gas passage connected with the gas turbine 6. After the gas turbine 6 is connected with gas The channel is communicated with itself through the high temperature regenerator 10, the gas turbine 6 and the gas channel are communicated with the outside through the high temperature heat exchanger 3; The exchanger 3 has a steam passage communicating with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage communicating with the condenser 4; the condenser 4 also has a cooling medium passage communicating with the outside, and the gas turbine 6 is connected to the compressor 5 and transmits power.

(2) In the process, compared with the dual-fuel gas-steam combined cycle power plant shown in FIG. 1, the difference is: the external second air flows through the compressor 5 to increase the pressure and temperature, and flows through the air heating furnace 7 and the air heating furnace. The high temperature regenerator 10 gradually absorbs heat and heats up, and then enters the combustion chamber 8; the external high-grade fuel enters the combustion chamber 8, is mixed with the compressed air from the high temperature regenerator 10 and burns into high temperature and high pressure gas; the high temperature and high pressure generated by the combustion chamber 8 The gas enters the gas turbine 6 to depressurize and perform work to a certain extent, and then flows through the high-temperature regenerator 10 to release heat and cool down, and then enters the gas turbine 6 to continue to depressurize and perform work; the gas discharged from the gas turbine 6 flows through the high-temperature heat exchanger 3 to release heat and cool down, and then It is discharged to the outside to form a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Figure 7/14 is implemented as follows:

(1) Structurally, it is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The high-grade fuel is communicated with the air heating furnace 7, the external high-grade fuel channel is communicated with the combustion chamber 8, and the external air channel is communicated with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source. The regenerator 9 is communicated with the outside, and there is an air channel outside that communicates with the compressor 5. After the compressor 5 has an air channel that communicates with itself through the high temperature regenerator 10, the compressor 5 also has an air channel that communicates with the combustion chamber through the air heating furnace 7. 8 is connected, the combustion chamber 8 also has a gas channel and is connected to the gas turbine 6. After the gas turbine 6 is connected to itself through the high temperature regenerator 10, the gas turbine 6 also has a gas channel to communicate with the outside through the high temperature heat exchanger 3; the condenser 4 After the condensate pipeline is communicated with the high-temperature heat exchanger 3 through the booster pump 2, the high-temperature heat exchanger 3 has a steam channel communicated with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam channel communicated with the condenser 4; the condenser 4 also has The cooling medium passage communicates with the outside, and the gas turbine 6 is connected to the compressor 5 to transmit power.

(2) In the process, compared with the dual-fuel gas-steam combined cycle power plant shown in Figure 1, the difference is: the external second air enters the compressor 5 to be boosted and heated to a certain degree, and then flows through the high-temperature recuperation The device 10 absorbs heat and heats up, and then enters the compressor 5 to continue to increase the pressure and heat up; the air discharged from the compressor 5 flows through the air heating furnace 7 to absorb heat and heat up, and then enters the combustion chamber 8; the external high-grade fuel enters the combustion chamber 8, and comes from The compressed air of the air heating furnace 7 is mixed and combusted into high temperature and high pressure gas; the high temperature and high pressure gas generated in the combustion chamber 8 enters the gas turbine 6 to depressurize and perform work to a certain extent, and then flows through the high temperature regenerator 10 to release heat and cool down, and then enters the gas turbine 6 to continue. Depressurization works; the gas discharged from the gas turbine 6 flows through the high temperature heat exchanger 3 to release heat and cool down, and then is discharged to the outside to form a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Figure 8/14 is implemented as follows:

(1) Structurally, in the dual-fuel gas-steam combined cycle power plant shown in Figure 1/14, the high-temperature heat exchanger 3 has a steam passage to communicate with the steam turbine 1 and is adjusted so that the high-temperature heat exchanger 3 has a steam passage through the air The heating furnace 7 communicates with the steam turbine 1 .

(2) In the process, compared with the dual-fuel gas-steam combined cycle power plant shown in Figure 1/14, the difference is that the condensate of the condenser 4 flows through the booster pump 2 for boosting, and flows through the high-temperature heat The exchanger 3 absorbs heat to heat up and vaporize, flows through the air heating furnace 7 to continue to absorb heat, and flows through the steam turbine 1 for decompression to perform work, and then enters the condenser 4 to release heat and condense, forming a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Fig. 9/14 is implemented as follows:

(1) Structurally, in the dual-fuel gas-steam combined cycle power plant shown in Figure 1/14, the high-temperature heat exchanger 3 has a steam passage and is connected to the steam turbine 1 and is adjusted so that the high-temperature heat exchanger 3 has a steam passage and the steam turbine After 1 is connected, the steam turbine 1 has a steam passage to communicate with itself through the air heating furnace 7 .

(2) In the process, compared with the dual-fuel gas-steam combined cycle power plant shown in Figure 1/14, the difference is that the condensate in the condenser 4 flows through the booster pump 2 for boosting, and then enters the steam turbine 1 for lowering. After the pressure work reaches a certain level, it flows through the air heating furnace 7 to absorb heat and heat up, and then enters the steam turbine 1 to depressurize and perform work; the low-pressure steam discharged from the steam turbine 1 enters the condenser 4 to release heat and condense, forming a dual-fuel gas-steam combined cycle power device.

The dual-fuel gas-steam combined cycle power plant shown in Figure 10/14 is implemented as follows:

(1) Structurally, in the dual-fuel gas-steam combined cycle power plant shown in Figure 1/14, a second booster pump and a low-temperature regenerator are added, and the condenser 4 has a condensate pipeline and a booster pump. 2. The connection is adjusted so that the condenser 4 has a condensate pipeline that communicates with the low-temperature regenerator 12 through the second booster pump 11, and the steam turbine 1 is provided with an extraction channel to communicate with the low-temperature regenerator 12, and the low-temperature regenerator 12 has condensate again. The pipeline communicates with the booster pump 2 .

(2) In terms of the process, compared with the dual-fuel gas-steam combined cycle power plant shown in Figure 1/14, the difference is that the condensate discharged from the condenser 4 flows through the second booster pump 11 and then enters the The low temperature regenerator 12 mixes with the extraction steam from the steam turbine 1, absorbs heat and raises the temperature, and releases the heat from the extraction steam to form a condensate; the condensate of the low temperature regenerator 12 flows through the booster pump 2 for boosting, and flows through the high temperature heat exchange The steam generator 3 absorbs heat to heat up, vaporize and superheat, and then enters the steam turbine 1 to depressurize the work; the steam entering the steam turbine 1 is depressurized to a certain extent and then divided into two paths - the first path is provided to the low-temperature regenerator 12, and the second path After continuing to depressurize and work, it enters the condenser 4 to release heat and condense to form a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Figure 11/14 is implemented as follows:

(1) Structurally, in the dual-fuel gas-steam combined cycle power plant shown in FIG. 1/14, an expansion speed-up machine 13 is added to replace the steam turbine 1, and a diffuser pipe 14 is added to replace the booster pump 2.

(2) In the process, compared with the dual-fuel gas-steam combined cycle power plant shown in Figure 1/14, the difference is that the condensate of the condenser 4 flows through the diffuser 14 to reduce the speed and increase the pressure, and flows through The high-temperature heat exchanger 3 absorbs heat to heat up, vaporize and superheat, and flows through the expansion speed-up machine 13 to depressurize and increase the speed, and then enter the condenser 4 to release heat and condense; the low-grade fuel passes through the air heating furnace 7 and the high-grade fuel. The driving heat load is jointly provided by the combustion chamber 8, the cooling medium takes away the low-temperature heat load through the condenser 4, and the air and gas take away the low-temperature heat load through the in-out process; the work output by the gas turbine 6 and the expansion speed-up machine 13 is provided to the compressor 5. and external power to form a dual-fuel gas-steam combined cycle power plant.

The dual fuel gas-steam combined cycle power plant shown in Figure 12/14 is implemented as follows:

(1) Structurally, in the dual-fuel gas-steam combined cycle power plant shown in Figure 10/14, an expansion speed increaser 13 is added to replace the steam turbine 1, a diffuser pipe 14 is added to replace the booster pump 2, and a second The second diffuser 15 replaces the second booster pump 11 .

(2) In the process, compared with the dual-fuel gas-steam combined cycle power plant shown in Figure 10/14, the difference is that the condensate discharged from the condenser 4 flows through the second diffuser pipe 15 to reduce speed and increase the pressure After that, it enters the low-temperature regenerator 12, mixes with the extraction steam from the expansion speed-up machine 13, absorbs heat, and raises the temperature, and the extraction steam releases heat into condensate; pressure, flows through the high temperature heat exchanger 3 to absorb heat, heat up, vaporize and superheat, and then enter the expansion speed-up machine 13 to depressurize and increase the speed; the steam entering the expansion speed-up machine 13 is depressurized to a certain extent and then divided into two paths. - The first path is supplied to the low-temperature regenerator 12, and the second path continues to depressurize and perform work and accelerates, and then enters the condenser 4 to release heat and condense, forming a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Figures 13/14 is implemented as follows:

(1) Structurally, it is mainly composed of a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, a gas turbine, a primary combustion chamber and a combustion chamber; a low-grade fuel passage is externally connected to the primary combustion chamber 16, There is also a high-grade fuel channel on the outside that communicates with the combustion chamber 8, and an air channel on the outside that communicates with the compressor 5 and then is divided into two paths—the first path communicates with the primary combustion chamber 16 and the second path passes through the primary combustion chamber 16 and the combustion chamber. 8 is connected, the primary combustion chamber 16 and the primary gas channel are communicated with the combustion chamber 8, and the combustion chamber 8 also has a gas channel to communicate with the outside through the gas turbine 6 and the high temperature heat exchanger 3; the condenser 4 has a condensate pipeline through a booster pump. 2 After being communicated with the high-temperature heat exchanger 3, the high-temperature heat exchanger 3 has a steam passage that communicates with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage that communicates with the condenser 4; the condenser 4 also has a cooling medium passage that communicates with the outside, and the gas turbine 6 Compressor 5 is connected and power is transmitted.

(2) In the process, the external air flows through the compressor 5 to increase the pressure and temperature, and then is divided into two paths—the first path directly enters the primary combustion chamber 16 to participate in the combustion, and the second path flows through the primary combustion chamber 16 to absorb heat and then enter the combustion Chamber 8 participates in combustion; external low-grade fuel enters primary combustion chamber 16, low-grade fuel and air are mixed in primary combustion chamber 16 and burn into primary gas with higher temperature, and primary gas releases heat to the air flowing through primary combustion chamber 16 Then, it is supplied to the combustion chamber 8; the external high-grade fuel enters the combustion chamber 8, is mixed with the air from the primary combustion chamber 16 and the primary gas and burns into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas generated by the combustion chamber 8 flows through the gas turbine 6. The condensate flows through the high-temperature heat exchanger 3 to release heat and cool down, and then is discharged to the outside; the condensate of the condenser 4 flows through the booster pump 2 to boost pressure, and flows through the high-temperature heat exchanger 3 to absorb heat, heat up, vaporize and superheat, and then enter the steam turbine. 1. Depressurization and work, the low-pressure steam discharged from the steam turbine 1 enters the condenser 4 to release heat and condense; the low-grade fuel passes through the primary combustion chamber 16 and the high-grade fuel passes through the combustion chamber 8 to jointly provide the driving heat load, and the cooling medium passes through the condenser 4. The low temperature heat load is taken away, and the air and gas take away the low temperature heat load through the in and out process; the work output by the steam turbine 1 and the gas turbine 6 is provided to the compressor 5 and the external power, or the work output by the steam turbine 1 and the gas turbine 6 is provided to the booster pump 2 , compressor 5 and external power to form a dual-fuel gas-steam combined cycle power plant.

The dual-fuel gas-steam combined cycle power plant shown in Figure 14/14 is implemented as follows:

(1) Structurally, it is mainly composed of a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, a gas turbine, a primary combustion chamber and a combustion chamber; a low-grade fuel passage is externally connected to the primary combustion chamber 16, There is also a high-grade fuel channel on the outside that communicates with the combustion chamber 8, and an air channel on the outside that communicates with the primary combustion chamber 16 through the compressor 5. The primary combustion chamber 16 also has a primary gas channel that communicates with the combustion chamber 8, and the combustion chamber 8 also has gas. The passage is communicated with the outside through the gas turbine 6 and the high temperature heat exchanger 3; the condenser 4 has a condensate pipeline connected with the high temperature heat exchanger 3 through the booster pump 2, and then the high temperature heat exchanger 3 has a steam passage communicated with the steam turbine 1. The steam turbine 1 also has a low-pressure steam passage that communicates with the condenser 4; the condenser 4 also has a cooling medium passage that communicates with the outside, and the gas turbine 6 is connected to the compressor 5 and transmits power.

(2) In the process, the external air flows into the primary combustion chamber 16 after being boosted and heated by the compressor 5, the external low-grade fuel enters the primary combustion chamber 16, and the low-grade fuel and air are mixed in the primary combustion chamber 16 and burned to a higher temperature. The high and air-rich primary gas is then supplied to the combustion chamber 8; the external high-grade fuel enters the combustion chamber 8, mixes with the primary gas from the primary combustion chamber 16 and burns into high temperature and high pressure gas, and the high temperature and high pressure gas generated by the combustion chamber 8 The condensate flows through the gas turbine 6 for depressurization, and flows through the high-temperature heat exchanger 3 to release heat and cool down, and then discharge to the outside; and overheating, then enter the steam turbine 1 to depressurize and perform work, and the low-pressure steam discharged from the steam turbine 1 enters the condenser 4 to release heat and condense; The medium takes away the low-temperature heat load through the condenser 4, and the air and gas take away the low-temperature heat load through the inlet and outlet processes; the work output by the steam turbine 1 and the gas turbine 6 is provided to the compressor 5 and the external power, or the work output by the steam turbine 1 and the gas turbine 6. Provide power to the booster pump 2, the compressor 5 and the outside to form a dual-fuel gas-steam combined cycle power plant.

The effect that the technology of the present invention can achieve—the dual-fuel gas-steam combined cycle power plant proposed by the present invention has the following effects and advantages:

(1) Reasonably mix low-grade fuel and high-grade fuel to build a high-temperature heat source to effectively reduce fuel costs.

(2) Hierarchical utilization of high temperature heat load, significantly reducing the irreversible loss of temperature difference, and effectively improving the thermal power conversion efficiency.

(3) The low-grade fuel completes the increase in the temperature of the compressed air and provides it for the high-grade fuel, effectively reducing the irreversible loss of temperature difference during the combustion process of the high-grade fuel.

(4) The combination of low-grade fuel and high-grade fuel provides high-temperature driving heat load for dual-fuel gas-steam combined cycle power plant.

(5) Low-grade fuels can be used or help to reduce the compression ratio of the top gas turbine circulation system, increase the gas circulation working fluid flow, and increase the power plant load.

(6) Directly reducing the input of high-grade fuel, the effect is equivalent to improving the utilization rate of converting high-grade fuel into mechanical energy.

(7) When the low-grade fuel is used alone, the high-temperature gas grade can be significantly improved, and the utilization value of the low-grade fuel can be improved.

(8) Significantly expand the range of fuels used by gas-steam combined cycle power plants and reduce the cost of energy consumption of the plant.

(9) Improve the value of fuel utilization, reduce greenhouse gas emissions, reduce pollutant emissions, and achieve outstanding energy conservation and emission reduction benefits.

(10) The structure is simple, the flow is reasonable, and the solutions are abundant, which is beneficial to reduce the manufacturing cost of the device and expand the technical application range.

Claims (14)

1. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber and a heat source regenerator; there is a low-grade fuel outside. It is communicated with the air heating furnace (7), and the external high-grade fuel channel is communicated with the combustion chamber (8), and the external air channel is connected with the air heating furnace (7) through the heat source regenerator (9). 7) There is also a gas channel that communicates with the outside through the heat source regenerator (9), and an external air channel that communicates with the combustion chamber (8) through the compressor (5) and the air heating furnace (7), and the combustion chamber (8) also has The gas channel is communicated with the gas turbine (6), and the gas turbine (6) and the gas channel are communicated with the outside through the high temperature heat exchanger (3); the condenser (4) has a condensate pipeline through the booster pump (2) to exchange heat with the high temperature After the device (3) is connected, the high temperature heat exchanger (3) is connected with the steam turbine (1), and the steam turbine (1) and the low-pressure steam channel are connected with the condenser (4); the condenser (4) also has a cooling medium. The passage is communicated with the outside, and the gas turbine (6) is connected to the compressor (5) and transmits power to form a dual-fuel gas-steam combined cycle power plant.
2. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The external low-grade fuel communicates with the air heating furnace (7), the external high-grade fuel channel communicates with the combustion chamber (8), and the external air channel communicates with the air heating furnace (7) through the heat source regenerator (9). , the air heating furnace (7) also has a gas channel connected to the outside through the heat source regenerator (9), and the external air channel is connected to the combustion chamber through the compressor (5), the high temperature regenerator (10) and the air heating furnace (7). The chamber (8) is communicated, and the combustion chamber (8) also has a gas channel communicated with the gas turbine (6), and the gas turbine (6) also has a gas channel communicated with the outside through the high temperature regenerator (10) and the high temperature heat exchanger (3); The condenser (4) has a condensate pipeline connected with the high-temperature heat exchanger (3) through the booster pump (2), and then the high-temperature heat exchanger (3) has a steam passage connected with the steam turbine (1), and the steam turbine (1) also A low-pressure steam passage communicates with the condenser (4); the condenser (4) also has a cooling medium passage communicated with the outside, and the gas turbine (6) is connected to the compressor (5) and transmits power to form a dual-fuel gas-steam combined cycle power plant .
3. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The external low-grade fuel communicates with the air heating furnace (7), the external high-grade fuel channel communicates with the combustion chamber (8), and the external air channel communicates with the air heating furnace (7) through the heat source regenerator (9). , the air heating furnace (7) also has a gas channel connected to the outside through the heat source regenerator (9), and the external air channel is connected to the combustion chamber through the compressor (5), the air heating furnace (7) and the high temperature regenerator (10). The chamber (8) is communicated, and the combustion chamber (8) also has a gas channel communicated with the gas turbine (6), and the gas turbine (6) also has a gas channel communicated with the outside through the high temperature regenerator (10) and the high temperature heat exchanger (3); The condenser (4) has a condensate pipeline connected with the high-temperature heat exchanger (3) through the booster pump (2), and then the high-temperature heat exchanger (3) has a steam passage connected with the steam turbine (1), and the steam turbine (1) also A low-pressure steam passage communicates with the condenser (4); the condenser (4) also has a cooling medium passage communicated with the outside, and the gas turbine (6) is connected to the compressor (5) and transmits power to form a dual-fuel gas-steam combined cycle power plant .
4. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The external low-grade fuel communicates with the air heating furnace (7), the external high-grade fuel channel communicates with the combustion chamber (8), and the external air channel communicates with the air heating furnace (7) through the heat source regenerator (9). , the air heating furnace (7) also has a gas channel connected to the outside through the heat source regenerator (9), and an external air channel is connected to the compressor (5), and then the compressor (5) has an air channel through the high temperature regenerator ( 10) Connected with itself, the compressor (5) also has an air passage connected with the combustion chamber (8) through the air heating furnace (7), the combustion chamber (8) also has a gas passage connected with the gas turbine (6), and the gas turbine (6) There is also a gas channel connected to the outside through the high temperature regenerator (10) and the high temperature heat exchanger (3); the condenser (4) has a condensate pipeline connected to the high temperature heat exchanger (3) through the booster pump (2) Afterwards, the high temperature heat exchanger (3) has a steam passage communicating with the steam turbine (1), the steam turbine (1) also has a low pressure steam passage communicating with the condenser (4); the condenser (4) also has a cooling medium passage communicating with the outside, The gas turbine (6) is connected to the compressor (5) and transmits power to form a dual-fuel gas-steam combined cycle power plant.
5. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The external low-grade fuel communicates with the air heating furnace (7), the external high-grade fuel channel communicates with the combustion chamber (8), and the external air channel communicates with the air heating furnace (7) through the heat source regenerator (9). , the air heating furnace (7) also has a gas channel connected to the outside through the heat source regenerator (9), and the external air channel is connected to the combustion chamber through the compressor (5), the high temperature regenerator (10) and the air heating furnace (7). The chamber (8) is connected, and the combustion chamber (8) also has a gas channel connected with the gas turbine (6). After the gas turbine (6) is connected with itself through the high temperature regenerator (10), the gas turbine (6) also has a gas channel. The high temperature heat exchanger (3) communicates with the outside; the condenser (4) has a condensate pipeline connected with the high temperature heat exchanger (3) via the booster pump (2), and then the high temperature heat exchanger (3) has a steam passage. Connected with the steam turbine (1), the steam turbine (1) also has a low-pressure steam passage that communicates with the condenser (4); the condenser (4) also has a cooling medium passage that communicates with the outside, and the gas turbine (6) is connected to the compressor (5) and transmits power to form a dual-fuel gas-steam combined cycle power plant.
6. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The external low-grade fuel communicates with the air heating furnace (7), the external high-grade fuel channel communicates with the combustion chamber (8), and the external air channel communicates with the air heating furnace (7) through the heat source regenerator (9). , the air heating furnace (7) also has a gas channel connected to the outside through the heat source regenerator (9), and the external air channel is connected to the combustion chamber through the compressor (5), the air heating furnace (7) and the high temperature regenerator (10). The chamber (8) is connected, and the combustion chamber (8) also has a gas channel connected with the gas turbine (6). After the gas turbine (6) is connected with itself through the high temperature regenerator (10), the gas turbine (6) also has a gas channel. The high temperature heat exchanger (3) communicates with the outside; the condenser (4) has a condensate pipeline connected with the high temperature heat exchanger (3) via the booster pump (2), and then the high temperature heat exchanger (3) has a steam passage. Connected with the steam turbine (1), the steam turbine (1) also has a low-pressure steam passage that communicates with the condenser (4); the condenser (4) also has a cooling medium passage that communicates with the outside, and the gas turbine (6) is connected to the compressor (5) and transmits power to form a dual-fuel gas-steam combined cycle power plant.
7. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high temperature heat exchanger, a condenser, a compressor, a gas turbine, an air heating furnace, a combustion chamber, a heat source regenerator and a high temperature regenerator; The external low-grade fuel communicates with the air heating furnace (7), the external high-grade fuel channel communicates with the combustion chamber (8), and the external air channel communicates with the air heating furnace (7) through the heat source regenerator (9). , the air heating furnace (7) also has a gas channel connected to the outside through the heat source regenerator (9), and an external air channel is connected to the compressor (5), and then the compressor (5) has an air channel through the high temperature regenerator ( 10) Connect with itself, the compressor (5) and the air passage are connected with the combustion chamber (8) through the air heating furnace (7), and the combustion chamber (8) and the gas passage are connected with the gas turbine (6) after the gas turbine (6) Then there is a gas channel that communicates with itself through the high temperature regenerator (10), the gas turbine (6) and the gas channel communicate with the outside through the high temperature heat exchanger (3); the condenser (4) has a condensate pipeline through a booster pump. (2) After being connected with the high temperature heat exchanger (3), the high temperature heat exchanger (3) has a steam passage connected with the steam turbine (1), and the steam turbine (1) also has a low pressure steam passage connected with the condenser (4); the condenser (4) There is also a cooling medium channel that communicates with the outside, and the gas turbine (6) is connected to the compressor (5) and transmits power to form a dual-fuel gas-steam combined cycle power plant.
8. The dual-fuel gas-steam combined cycle power plant is a dual-fuel gas-steam combined cycle power plant described in any one of claims 1-7, in which the high-temperature heat exchanger (3) is provided with a steam passage and a steam turbine (1). ) communication is adjusted so that the high temperature heat exchanger (3) has a steam passage connected with the steam turbine (1) through the air heating furnace (7) to form a dual-fuel gas-steam combined cycle power plant.
9. The dual-fuel gas-steam combined cycle power plant is a dual-fuel gas-steam combined cycle power plant described in any one of claims 1-7, in which the high-temperature heat exchanger (3) is provided with a steam passage and a steam turbine (1). ) connection is adjusted so that the high-temperature heat exchanger (3) has a steam passage connected with the steam turbine (1), after which the steam turbine (1) has a steam passage connected with itself through the air heating furnace (7) to form a dual-fuel gas-steam combined cycle power plant .
10. The dual-fuel gas-steam combined cycle power plant is any one of the dual-fuel gas-steam combined cycle power plants described in claims 1-9, adding a second booster pump and a low-temperature regenerator, the condenser (4) The condensate pipeline is communicated with the booster pump (2) and adjusted so that the condenser (4) has the condensate pipeline communicated with the low temperature regenerator (12) through the second booster pump (11), and the steam turbine (1) ) A steam extraction channel is arranged to communicate with the low temperature regenerator (12), and the low temperature regenerator (12) has a condensate pipeline connected with the booster pump (2) to form a dual-fuel gas-steam combined cycle power plant.
11. The dual-fuel gas-steam combined cycle power plant is any one of the dual-fuel gas-steam combined cycle power plants described in claims 1-9, adding an expansion speed increaser (13) and replacing the steam turbine (1), A diffuser pipe (14) is added and the booster pump (2) is replaced to form a dual-fuel gas-steam combined cycle power plant.
12. The dual-fuel gas-steam combined cycle power plant is any one of the dual-fuel gas-steam combined cycle power plants described in claim 10, adding an expansion speed increaser (13) and replacing the steam turbine (1), increasing the expansion The pressure pipe (14) is replaced by the booster pump (2), and the second diffuser pipe (15) is added to replace the second booster pump (11) to form a dual-fuel gas-steam combined cycle power plant.
13. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, a gas turbine, a primary combustion chamber and a combustion chamber; there are low-grade fuel passages and primary combustion chambers outside. (16) is connected, and there is a high-grade fuel channel outside that communicates with the combustion chamber (8), and an external air channel that communicates with the compressor (5) and then divides into two paths—the first path communicates with the primary combustion chamber (16) and The second path is communicated with the combustion chamber (8) through the primary combustion chamber (16), the primary combustion chamber (16) and the primary gas passage are communicated with the combustion chamber (8), and the combustion chamber (8) and the gas passage are passed through the gas turbine (6). ) and the high temperature heat exchanger (3) are communicated with the outside; the condenser (4) has a condensate pipeline connected with the high temperature heat exchanger (3) through the booster pump (2), and then the high temperature heat exchanger (3) has steam. The passage is communicated with the steam turbine (1), the steam turbine (1) and the low-pressure steam passage are communicated with the condenser (4); the condenser (4) and the cooling medium passage are communicated with the outside, and the gas turbine (6) is connected to the compressor (5) and Power is transmitted to form a dual-fuel gas-steam combined cycle power plant.
14. The dual-fuel gas-steam combined cycle power plant is mainly composed of a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, a gas turbine, a primary combustion chamber and a combustion chamber; there are low-grade fuel passages and primary combustion chambers outside. (16) is connected, the external high-grade fuel channel is connected to the combustion chamber (8), and the external air channel is connected to the primary combustion chamber (16) through the compressor (5), and the primary combustion chamber (16) also has primary gas. The passage is communicated with the combustion chamber (8), and the combustion chamber (8) and the gas passage are communicated with the outside through the gas turbine (6) and the high temperature heat exchanger (3); the condenser (4) has a condensate pipeline through a booster pump ( 2) After being communicated with the high-temperature heat exchanger (3), the high-temperature heat exchanger (3) has a steam passage that communicates with the steam turbine (1), and the steam turbine (1) also has a low-pressure steam passage that communicates with the condenser (4); the condenser ( 4) There is also a cooling medium channel that communicates with the outside, and the gas turbine (6) is connected to the compressor (5) and transmits power to form a dual-fuel gas-steam combined cycle power plant.

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