CN218913016U

CN218913016U - Gas-steam combined cycle unit

Info

Publication number: CN218913016U
Application number: CN202222797713.8U
Authority: CN
Inventors: 聂海龙; 叶今墨; 韩嘉桢
Original assignee: Baoding Slow Niu Information Technology Co ltd
Current assignee: Baoding Slow Niu Information Technology Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-04-25
Anticipated expiration: 2032-10-24

Abstract

The utility model discloses a gas-steam combined cycle unit which comprises a gas turbine A, a gas turbine B, a waste heat boiler A, a waste heat boiler B, a steam turbine, a generator A, a generator B and a generator C, wherein the generator A and the generator B are respectively connected with the gas turbine A and the gas turbine B, combustion exhaust gas of the gas turbine A and combustion exhaust gas of the gas turbine B are respectively connected with water circulation of the waste heat boiler A and the waste heat boiler B, a steam output pipe of the water circulation is connected with the steam turbine, and an output end of the steam turbine is connected with the generator C.

Description

Gas-steam combined cycle unit

Technical Field

The utility model relates to the technical field of dynamic working conditions of gas turbines, in particular to a gas-steam combined cycle unit.

Background

The China is taken as an energy source for large countries, actively participates in solving the global climate change problem, and proposes that carbon emission reaches a peak value in 2030 and carbon neutralization is realized in 2060, and the national strategy level is improved. Under the target constraint of the 'double carbon' task, the energy and power industry has remolded the pattern, and the coal and electricity which is used as main energy source of China is transformed into the adjustment energy source for a long time, and the energy production is driven by renewable energy sources to be clean. By 2020, the installed capacity of a fan and a photovoltaic in China only completes half of the accumulated targets in the next ten years, wind-solar power generation has more limited factors, the uncertainty of output can bring serious impact to the stability adjustment and the flexible scheduling of a power system, and new energy power generation is completed as a main power generation energy source never in the first time, and reasonable planning and time transition are still needed. During the period, the gas-steam combined cycle unit can support system transformation and can be matched with new energy development, so that the gas-steam combined cycle unit is the best option under the existing conditions.

The gas-steam combined cycle unit belongs to thermal power generation, and is different from the traditional pulverized coal thermal unit, the combustion system of the gas-steam combined cycle unit is completed by a gas turbine, and the fuel is selected from natural gas (methane CH) ₄ ) And after full combustion, higher heat value and zero pollution emission are obtained. The emission reduction effect of the gas-steam combined cycle unit is obvious, and meanwhile, the effective capacity with high duty ratio can be provided. In recent years, the accident of power shortage and power failure of 'switching-off and limiting-on' occurs in China, and the problems of unbalanced supply of a power generation side and a power grid side in a power system and unmatched power supply capacity and maximum load are reflected. The method is characterized in that the consumption of residents is increased, the social electricity utilization structure is changed, the electricity utilization load is increased particularly in winter and summer, the peak-valley difference of a power grid is continuously enlarged, the frequency modulation and voltage regulation capability is insufficient, and the severity of the power guarantee supply problem is highlighted. Therefore, the capacity of the newly added gas-steam combined cycle unit can effectively solve and relieve the peak shaving problem of the power grid, the total amount of the gas power generator during fourteen-five periods is estimated to reach 1.4-1.5 hundred million kilowatts, and the growth space is greatly improved.

Disclosure of Invention

In view of the deficiencies of the prior art, the present utility model is directed to a gas-steam combined cycle unit.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the gas-steam combined cycle unit comprises a gas turbine A, a gas turbine B, a waste heat boiler A, a waste heat boiler B, a steam turbine, a generator A, a generator B and a generator C, wherein the generator A and the generator B are respectively connected with the gas turbine A and the gas turbine B, combustion exhaust of the gas turbine A and combustion exhaust of the gas turbine B are respectively connected with water circulation of the waste heat boiler A and the waste heat boiler B, a steam output pipe of the water circulation is connected with the steam turbine, and an output end of the steam turbine is connected with the generator C.

The gas turbine A comprises a gas compressor A, a combustion chamber A and a turbine A, wherein the generator A is connected with an input point of the gas compressor A, an output pipe of the gas compressor A is connected with an input end of the combustion chamber A, an output end of the combustion chamber A is connected with an input end of the turbine A, and an output end of the turbine A is connected with water circulation of the waste heat boiler A.

The gas turbine B comprises a gas compressor B, a combustion chamber B and a turbine B, wherein the generator B is connected with an input point of the gas compressor B, an output pipe of the gas compressor B is connected with an input end of the combustion chamber B, an output end of the combustion chamber B is connected with an input end of the turbine B, and an output end of the turbine B is connected with water circulation of the waste heat boiler B.

The system also comprises a DMS prediction controller and a T-S fuzzy model module of the gas turbine, which are used for controlling the power output and the exhaust temperature output of the gas turbine.

The utility model has the beneficial effects that: the success rate is high, the starting success rate of the auxiliary steam starting gas-steam combined cycle unit is over 99 percent by utilizing the waste heat boiler, and the utilization efficiency of the waste heat boiler is improved; the energy is saved, auxiliary steam is provided by the waste heat boiler to replace the starting boiler for auxiliary steam, and a large amount of natural gas and electricity consumed by the starting boiler to start the combined cycle unit are saved.

Drawings

FIG. 1 is a schematic diagram of a structural connection of the present utility model;

FIG. 2 is a block diagram of a prediction system according to the present utility model.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings, and it should be noted that, on the premise of the present technical solution, the present embodiment provides a detailed implementation manner and a specific operation procedure, but the protection scope of the present utility model is not limited to the present embodiment.

As shown in fig. 1, the utility model is a gas-steam combined cycle unit, the unit comprises a gas turbine A1, a gas turbine B2, a waste heat boiler A3, a waste heat boiler B4, a steam turbine 5, and a generator A6, a generator B7 and a generator C8, wherein the generator A6 and the generator B7 are respectively connected with the gas turbine A1 and the gas turbine B2, combustion exhaust gas of the gas turbine A1 and the gas turbine B2 is respectively connected with water circulation of the waste heat boiler A3 and the waste heat boiler B4, a steam output pipe of the water circulation is connected with the steam turbine 5, and an output end of the steam turbine 5 is connected with the generator C8.

Further, as shown in fig. 1, the gas turbine A1 includes a compressor a11, a combustion chamber a12 and a turbine a13, wherein the generator A6 is connected to an input point of the compressor a11, an output pipe of the compressor a11 is connected to an input end of the combustion chamber a12, an output end of the combustion chamber a12 is connected to an input end of the turbine a13, and an output end of the turbine a13 is connected to a water circulation of the waste heat boiler A3.

Further, as shown in fig. 1, the gas turbine B2 includes a compressor B21, a combustion chamber B22, and a turbine B23, where the generator B7 is connected to an input point of the compressor B21, an output pipe of the compressor B21 is connected to an input end of the combustion chamber B22, an output end of the combustion chamber B22 is connected to an input end of the turbine B23, and an output end of the turbine B23 is connected to a water circulation of the waste heat boiler B4.

Examples

The working principle of the utility model is as follows: the gas-steam combined cycle unit in the high-well gas thermal power plant comprises: the utility model has the advantages of higher operation heat efficiency, flexible adjustment capability and the like, the gas turbines and the waste heat boilers are coaxially arranged, and the steam turbines and the generators are independently arranged.

Various other corresponding changes and modifications will occur to those skilled in the art from the foregoing description and the accompanying drawings, and all such changes and modifications are intended to be included within the scope of the present utility model as defined in the appended claims.

Claims

1. The gas-steam combined cycle unit is characterized by comprising a gas turbine A, a gas turbine B, a waste heat boiler A, a waste heat boiler B, a steam turbine, a generator A, a generator B and a generator C, wherein the generator A and the generator B are respectively connected with the gas turbine A and the gas turbine B, combustion exhaust gas of the gas turbine A and combustion exhaust gas of the gas turbine B are respectively connected with water circulation of the waste heat boiler A and the waste heat boiler B, a steam output pipe of the water circulation is connected with the steam turbine, and an output end of the steam turbine is connected with the generator C.

2. The gas-steam combined cycle unit according to claim 1, wherein the gas turbine a comprises a compressor a, a combustion chamber a and a turbine a, wherein the generator a is connected to an input point of the compressor a, an output pipe of the compressor a is connected to an input end of the combustion chamber a, an output end of the combustion chamber a is connected to an input end of the turbine a, and an output end of the turbine a is connected to a water cycle of the waste heat boiler a.

3. The gas-steam combined cycle unit according to claim 1, wherein the gas turbine B comprises a compressor B, a combustion chamber B and a turbine B, wherein the generator B is connected to an input point of the compressor B, an output pipe of the compressor B is connected to an input end of the combustion chamber B, an output end of the combustion chamber B is connected to an input end of the turbine B, and an output end of the turbine B is connected to a water cycle of the waste heat boiler B.