A gas-steam combined cycle unit structure and layout method

Abstract

The present invention relates to a gas-steam combined cycle unit structure and layout method. The gas-steam combined cycle unit structure includes an upper plant and a lower plant, wherein the lower plant is provided with a gas turbine and a gas turbine generator, and the upper plant includes a left plant and a right plant, wherein the left plant is provided with a steam turbine, a steam turbine generator and an auxiliary room for waste heat boiler equipment, and the right plant is provided with a waste heat boiler. The gas-steam combined cycle unit structure of the present invention reduces the total volume of the plant; reduces the distance between the steam turbine and the waste heat boiler, effectively reduces the length of the steam-water pipeline connecting the steam turbine and the waste heat boiler, and especially reduces the length of the expensive high-temperature and high-pressure steam pipeline in the steam pipeline system, which is conducive to reducing the initial investment. The gas-steam combined cycle unit structure and layout method of the present invention effectively reduce the pressure drop and heat dissipation loss of the pipeline system by reducing the length of the pipeline, thereby improving the thermal economy of the unit.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation equipment, and in particular to a gas-steam combined cycle unit structure and arrangement method. Background Art

[0002] The gas-steam combined cycle unit operates in the manner that the gas turbine drives the steam turbine, and the exhaust gas of the gas turbine is discharged into the waste heat boiler. The high-temperature and high-pressure steam generated drives the steam turbine, which in turn drives the steam turbine to generate electricity.

[0003] At present, the layout of the main plant of domestic gas-steam combined cycle units is generally arranged in several modules, including gas turbine generator module, steam turbine generator module and waste heat boiler island module. According to the current requirements of environmental protection and noise reduction, waste heat boiler feed water pumps are equipped with independent plant buildings, which are generally arranged next to waste heat boilers and are called boiler auxiliary rooms.

[0004] There are several typical main plant layouts, such as Figures 1 to 3 As shown. In the above main plant, the boiler auxiliary room is only equipped with boiler feed water pumps, boiler-turbine connecting pipes and some electronic equipment rooms, etc., and most of the space is not used, resulting in a large waste of space. In addition, the connecting pipes between the boiler and the steam turbine, especially the high-pressure main steam and reheating hot section pipes, are made of imported pipes. The distance from the auxiliary room to the main plant is relatively long, resulting in a large initial investment. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a gas-steam combined cycle unit structure and layout method to solve the technical problems of large space waste and high cost of existing gas-steam combined cycle units.

[0006] The technical solution of the gas-steam combined cycle unit structure of the present invention is:

[0007] A gas-steam combined cycle unit structure comprises an upper plant and a lower plant, wherein the lower plant is provided with a gas turbine and a gas turbine generator, and the upper plant comprises a left plant and a right plant, wherein the left plant is provided with a steam turbine, a steam turbine generator and an auxiliary room for waste heat boiler equipment, and the right plant is provided with a waste heat boiler.

[0008] As a further improvement of the above technical solution, a feed water pump, a vacuum pump, an auxiliary machine cooling water pump and a condensate pump are also provided in the left plant building, and the steam turbine and the steam turbine generator are located on the upper side of the feed water pump, the vacuum pump, the auxiliary machine cooling water pump and the condensate pump.

[0009] As a further improvement of the above technical solution, the left plant building is also equipped with steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves, and the steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves are located at the lower side of the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump.

[0010] The technical solution of the gas-steam combined cycle unit arrangement method of the present invention is:

[0011] A gas-steam combined cycle unit layout method includes arranging a gas turbine and a gas turbine generator in a lower plant, arranging a steam turbine, a steam turbine generator and an auxiliary room for waste heat boiler equipment in a left plant, and arranging a waste heat boiler in a right plant.

[0012] As a further improvement of the above technical solution, the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump are arranged in the left plant building, and the steam turbine and steam turbine generator are located on the upper side of the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump.

[0013] As a further improvement of the above technical solution, the steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves are arranged in the left plant building, and the steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves are located at the lower side of the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump.

[0014] The present invention provides a gas-steam combined cycle unit structure and arrangement method, which has the following beneficial effects compared with the prior art:

[0015] The gas-steam combined cycle unit structure and layout method of the present invention reduces the total volume of the plant; reduces the distance between the steam turbine and the waste heat boiler, effectively reduces the length of the steam-water pipeline connecting the steam turbine and the waste heat boiler, and especially reduces the length of the expensive high-temperature and high-pressure steam pipeline in the steam pipeline system, which is beneficial to reducing the initial investment.

[0016] The gas-steam combined cycle unit structure and layout method of the present invention effectively reduces the pressure drop and heat dissipation loss of the pipeline system by reducing the pipeline length, thereby improving the thermal economy of the unit.

[0017] The structure and layout method of the gas-steam combined cycle unit reduces the distance between the condenser and the circulating water pump room, and reduces the length of the circulating water pipe (buried pipe). BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a gas-steam combined cycle unit structure in the prior art;

[0019] Figure 2It is a structural schematic diagram of a gas-steam combined cycle unit structure in the prior art;

[0020] Figure 3 It is a structural schematic diagram of a gas-steam combined cycle unit structure in the prior art;

[0021] Figure 4 It is a structural schematic diagram of a gas-steam combined cycle unit structure in the prior art;

[0022] Figure 5 It is a structural schematic diagram of the gas-steam combined cycle unit structure of the present invention;

[0023] Figure 6 It is a schematic diagram of the internal structure of the gas-steam combined cycle unit structure of the present invention;

[0024] Among them: 1. Gas turbine; 2. Gas turbine generator; 3. Steam turbine; 4. Steam turbine generator; 5. Waste heat boiler; 6. Waste heat boiler equipment auxiliary room. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] A specific embodiment of the gas-steam combined cycle unit structure of the present invention includes an upper plant and a lower plant, wherein the lower plant is provided with a gas turbine 1 and a gas turbine generator 2, the upper plant includes a left plant and a right plant, wherein the left plant is provided with a steam turbine 3, a steam turbine generator 4 and a waste heat boiler equipment auxiliary room 6, and the right plant is provided with a waste heat boiler 5.

[0027] In this embodiment, a feed water pump, a vacuum pump, an auxiliary machine cooling water pump and a condensate pump are also provided in the left plant building, and the steam turbine 3 and the steam turbine generator 4 are located on the upper side of the feed water pump, the vacuum pump, the auxiliary machine cooling water pump and the condensate pump.

[0028] In this embodiment, the left plant building is also equipped with four sets of oil system equipment for the steam turbine generator, high, medium and low pressure main steam valves and bypass valves. The four sets of oil system equipment for the steam turbine generator, high, medium and low pressure main steam valves and bypass valves are located at the lower side of the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump.

[0029] The present invention provides a gas-steam combined cycle unit structure, which has the advantages of:

[0030] The gas-steam combined cycle unit structure of the present invention reduces the total volume of the plant; reduces the distance between the steam turbine 3 and the waste heat boiler 5, effectively reduces the length of the steam-water pipeline connecting the steam turbine 3 and the waste heat boiler 5, and especially reduces the length of the expensive high-temperature and high-pressure steam pipeline in the steam pipeline system, which is beneficial to reducing the initial investment.

[0031] The gas-steam combined cycle unit structure of the present invention reduces the length of the pipeline, effectively reduces the pressure drop and heat dissipation loss of the pipeline system, and improves the thermal economy of the unit.

[0032] The gas-steam combined cycle unit structure reduces the distance between the condenser and the circulating water pump room, and reduces the length of the circulating water pipe (buried pipe).

[0033] In a specific embodiment of the gas-steam combined cycle unit arrangement method of the present invention, the gas turbine and the gas turbine generator are arranged in the lower plant, the steam turbine, the steam turbine generator and the waste heat boiler equipment auxiliary room are arranged in the left plant, and the waste heat boiler is arranged in the right plant.

[0034] In this embodiment, the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump are arranged in the left plant building, and the steam turbine and steam turbine generator are located on the upper side of the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump.

[0035] In this embodiment, the steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves are arranged in the left plant building, and the steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves are located at the lower side of the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump.

[0036] The present invention provides a gas-steam combined cycle unit arrangement method, which has the advantages of:

[0037] The gas-steam combined cycle unit of the present invention reduces the total volume of the plant; reduces the distance between the steam turbine and the waste heat boiler, effectively reduces the length of the steam-water pipeline connecting the steam turbine and the waste heat boiler, and especially reduces the length of the expensive high-temperature and high-pressure steam pipeline in the steam pipeline system, which is beneficial to reducing the initial investment.

[0038] The gas-steam combined cycle unit of the present invention reduces the length of the pipeline, effectively reduces the pressure drop and heat dissipation loss of the pipeline system, and improves the thermal economy of the unit.

[0039] The gas-steam combined cycle unit reduces the distance between the condenser and the circulating water pump room, and reduces the length of the circulating water pipe (buried pipe).

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A gas-steam combined cycle unit structure, characterized in that: It includes an upper plant and a lower plant, wherein the lower plant is provided with a gas turbine and a gas turbine generator, and the upper plant includes a left plant and a right plant, wherein the left plant is provided with a steam turbine, a steam turbine generator and an auxiliary room for waste heat boiler equipment, and the right plant is provided with a waste heat boiler; The left plant is also provided with a feed water pump, a vacuum pump, an auxiliary machine cooling water pump and a condensate pump, and the steam turbine and the steam turbine generator are located on the upper side of the feed water pump, the vacuum pump, the auxiliary machine cooling water pump and the condensate pump; The left plant building is also equipped with steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves. The steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves are located at the lower side of the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump.

2. A method for arranging a gas-steam combined cycle unit structure as claimed in claim 1, characterized in that: The gas turbine and gas turbine generator are arranged in the lower plant building, the steam turbine, steam turbine generator and waste heat boiler equipment auxiliary room are arranged in the left plant building, and the waste heat boiler is arranged in the right plant building.

3. The method for arranging the structure of a gas-steam combined cycle unit according to claim 2, characterized in that: The feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump are arranged in the left plant building, and the steam turbine and steam turbine generator are located on the upper side of the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump.

4. The method for arranging the structure of a gas-steam combined cycle unit according to claim 2, characterized in that: The steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves are arranged in the left plant building, and the steam turbine generator oil system equipment, high, medium and low pressure main steam valves and bypass valves are located at the lower side of the feed water pump, vacuum pump, auxiliary machine cooling water pump and condensate pump.

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