Cooling steam supply device based on gas-steam combined cycle unit

Abstract

The utility model discloses a cooling steam supply device based on a gas-steam combined cycle unit, which relates to the technical field of cooling steam supply devices and comprises a box body, an automatic water discharge mechanism mounted on the surface of the box body, a boiler mounted in the box body, a heater mounted on the rear side of the boiler and a combustion-supporting mechanism mounted on the front side of the boiler. A transmission valve is installed at the top of the boiler, a pipeline is installed at one end of the transmission valve, a low-pressure cylinder is fixedly connected to one end of the pipeline, and a guide pipe is installed on the front side of the low-pressure cylinder. Gas is transmitted into the cylinder body through the transmission valve, the cooling machine is started, the cooling machine is connected with the cooling pipe in a sealed mode through the conduction pipe, the cooling machine injects cooling liquid into the cooling pipe through the conduction pipe, the cooling liquid absorbs heat from the cylinder sleeve and then flows out of the other end of the cooling pipe, the heat is taken away from the cylinder body, and cooling is completed. Therefore, the steam is effectively and quickly cooled, the step of manual cooling is omitted, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling steam supply devices, in particular to a cooling steam supply device based on a gas-steam combined cycle unit. Background Technique

[0002] A gas-steam combined cycle unit is a power device that combines a steam turbine cycle and a gas turbine cycle. When a single-shaft gas-steam combined cycle unit is rigidly connected without an SSS clutch between the steam turbine and the generator, the steam turbine rotates synchronously with the gas turbine. When the gas turbine ignites and accelerates to a certain speed, cooling steam needs to be provided to the steam turbine to prevent the temperature of the turbine blades from rising too high. After the first set of units' gas turbines start igniting, the steam turbines rotate with the gas turbines. When the unit speed reaches a certain value, the low-pressure regulating valve of the steam turbine opens to the cooling position so that auxiliary steam enters the steam turbine to cool the low-pressure cylinder. After the first set of units are started, the auxiliary boiler usually stops; when the second set of units start, steam is provided from the auxiliary steam main pipe of the adjacent unit; when the unit operates under the fast cut-back load (FCB) condition, the steam turbine will be dragged by the gas turbine to continuously rotate. As time goes by, the exhaust temperature of the low-pressure cylinder of the steam turbine will rise. Therefore, the low-pressure main steam regulating valve needs to be opened to a certain opening again to introduce a small amount of cooling steam into the low-pressure cylinder.

[0003] Currently, the auxiliary boiler usually only provides cooling steam during the start-up process of the first set of units. After the first set of units are started, the auxiliary boiler usually stops; the cooling steam is provided by the manual operation of the unit operators, and the steam combustion volatilization is not sufficient, resulting in a low operation quality of the overall device. Content of the Utility Model

[0004] The purpose of the utility model is to provide a cooling steam supply device based on a gas-steam combined cycle unit to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A cooling steam supply device based on a gas-steam combined cycle unit includes a box body. An automatic water drainage mechanism is installed on the surface of the box body. A boiler is installed inside the box body. A heating machine is installed at the rear of the boiler. A combustion assisting mechanism is installed at the front of the boiler. A transmission valve is installed on the top of the boiler. One end of the transmission valve is installed with a pipeline. One end of the pipeline is fixedly connected to a low-pressure cylinder. A conduit is installed at the front of the low-pressure cylinder.

[0007] The combustion assisting mechanism includes a combustion assisting turbine. The combustion assisting turbine is installed on one side of the boiler. A gas pipeline is installed at one end of the combustion assisting turbine.

[0008] A further improvement of the technical solution of the present utility model lies in that: an installation box is installed on the surface of the combustion-supporting turbine, an air suction shell is installed on the top of the installation box, and a filter plate is installed on the surface of the air suction shell, and the filter plate is used to filter dust.

[0009] A further improvement of the technical solution of the present utility model lies in that: the low-pressure cylinder includes a housing, the housing is installed on one side of the box body, and a cylinder body is installed inside the housing, and the cylinder body is used to load steam.

[0010] A further improvement of the technical solution of the present utility model lies in that: a cooling pipe is installed on the surface of the cylinder body, one end of the cooling pipe is fixedly connected to a transfer pipe, and one end of the transfer pipe is fixedly connected to a cooler, and the coolant is transmitted through the cooler.

[0011] A further improvement of the technical solution of the present utility model lies in that: the heater includes a protection column, the protection column is installed on the surface of the box body, a leak hole is opened on the top surface of the protection column, two water inlets with a horn-shaped cross section are opened on the side wall of the protection column, a water discharge port is opened at the bottom of the protection column, and the protection column penetrates through and communicates with the boiler, and water is discharged through the water discharge port.

[0012] A further improvement of the technical solution of the present utility model lies in that: a floating plate is slidably connected inside the protection column, and a connecting rod is vertically fixedly connected to the bottom of the floating plate. The floating plate is slidably connected inside the protection column, and a connecting rod is vertically fixedly connected to the bottom of the floating plate, so that when the inside of the boiler reaches a certain amount, the floating plate is automatically floated up.

[0013] A further improvement of the technical solution of the present utility model lies in that: a sealing plate is fixedly connected to the surface of the connecting rod, and a baffle is fixedly connected to one end of the connecting rod, and the sealing plate and the baffle are used for shielding and sealing.

[0014] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model compared with the prior art is:

[0015] 1. The present utility model provides a cooling steam supply device based on a gas-steam combined cycle unit. The gas is transmitted into the cylinder body through a transmission valve. The cooler is started. The cooler is hermetically connected to the cooling pipe through the transfer pipe. The cooler injects the coolant into the cooling pipe through the transfer pipe. The coolant absorbs heat from the cylinder liner and then flows out from the other end of the cooling pipe, taking the heat away from the cylinder body to complete the cooling, so that the gas inside the cylinder body can be cooled, and thus the steam can be effectively and quickly cooled, eliminating the step of manual cooling and improving the work efficiency.

[0016] 2. The utility model provides a cooling steam supply device based on a gas-steam combined cycle unit, which heats and burns water in the boiler through a heater, intensifies the combustion of the boiler through a combustion-supporting mechanism, and increases the combustion effect of the gas. By starting the combustion-supporting turbine, two gas pipes for conveying gas are installed on the side wall of the combustion-supporting turbine, and a mounting box is fixedly connected to the side wall of the combustion-supporting turbine. A hollow prism-shaped air suction shell is symmetrically installed on the top and bottom of the mounting box, and a filter plate for filtering dust in the air is installed inside the air suction shell, which increases the combustion effect of the gas, makes the steam dissipation more sufficient, increases the steam volume of subsequent cooling steam, and improves the operation quality of the overall device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a structural schematic diagram of the combustion-supporting mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the low-pressure cylinder of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the utility model.

[0021] In the figure: 1. box body; 2. heating machine; 3. automatic water discharge mechanism; 30. protection column; 31. air leakage hole; 32. floating plate; 33. water inlet; 34. connecting rod; 35. sealing plate; 37. baffle; 38. water discharge port; 4. transmission valve; 5. pipeline; 6. combustion-supporting mechanism; 60. combustion-supporting turbine; 61. gas pipe; 62. installation box; 63. filter plate; 64. suction shell; 7. duct; 8. low-pressure cylinder; 80. shell; 81. cylinder body; 82. cooling pipe; 83. conduction pipe; 84. cooler; 9. boiler. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the embodiments:

[0023] Example 1

[0024] like Figures 1-4As shown, the utility model provides a cooling steam supply device based on a gas-steam combined cycle unit, comprising a box body 1, an automatic water discharge mechanism 3 is installed on the surface of the box body 1, a boiler 9 is installed inside the box body 1, a heating machine 2 is installed on the rear side of the boiler 9, a combustion-supporting mechanism 6 is installed on the front side of the boiler 9, a transmission valve 4 is installed on the top of the boiler 9, a pipe 5 is installed on one end of the transmission valve 4, a low-pressure cylinder 8 is fixedly connected to one end of the pipe 5, a guide tube 7 is installed on the front side of the low-pressure cylinder 8, the combustion-supporting mechanism 6 includes a combustion-supporting turbine 60, the combustion-supporting turbine 60 is installed on one side of the boiler 9, a gas pipe 61 is installed on one end of the combustion-supporting turbine 60, a mounting box 62 is installed on the surface of the combustion-supporting turbine 60, an air suction shell 64 is installed on the top of the mounting box 62, and a filter plate 63 is installed on the surface of the air suction shell 64;

[0025] Specifically, water is discharged through the automatic water discharge mechanism 3, and then the water is transmitted to the boiler 9, the water in the boiler 9 is heated and burned by the heater 2, and the combustion of the boiler 9 is intensified by the combustion-supporting mechanism 6, so as to increase the combustion effect of the gas, and the combustion-supporting turbine 60 is started, and two gas pipes 61 for conveying gas are installed on the side wall of the combustion-supporting turbine 60, and the side wall of the combustion-supporting turbine 60 is fixedly connected with an installation box 62, and a hollow prism-shaped air suction shell 64 is symmetrically installed on the top and bottom of the installation box 62, and a filter plate 63 for filtering dust in the air is installed inside the air suction shell 64, so as to increase the combustion effect of the gas.

[0026] Example 2

[0027] like Figures 1-4 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the low-pressure cylinder 8 includes a shell 80, the shell 80 is installed on one side of the box body 1, a cylinder body 81 is installed inside the shell 80, a cooling pipe 82 is installed on the surface of the cylinder body 81, one end of the cooling pipe 82 is fixedly connected to a conduction pipe 83, and one end of the conduction pipe 83 is fixedly connected to a cooler 84, the heating machine 2 includes a protective column 30, the protective column 30 is installed on the surface of the box body 1, a leakage hole 31 is opened on the top surface of the protective column 30, two water inlets 33 with a trumpet-shaped cross-section are opened on the side wall of the protective column 30, a drain port 38 is opened at the bottom of the protective column 30, the protective column 30 passes through the boiler 9 and is connected, the inner part of the protective column 30 is slidably connected to the bottom of the floating plate 32 and is vertically fixedly connected to a connecting rod 34, a sealing plate 35 is fixedly connected to the surface of the connecting rod 34, and a baffle 37 is fixedly connected to one end of the connecting rod 34;

[0028] Specifically, when the boiler 9 burns to generate steam, the gas is transmitted into the cylinder block 81 through the transmission valve 4. The cooler 84 is started. The cooler 84 is hermetically connected to the cooling pipe 82 through the transmission pipe 83. The cooler 84 injects the coolant into the cooling pipe 82 through the transmission pipe 83. After the coolant absorbs heat from the cylinder liner, it flows out from the other end of the cooling pipe 82, taking the heat away from the cylinder block 81 to complete the cooling. Thus, the gas inside the cylinder block 81 can be cooled, and the steam can be effectively and quickly cooled. When the steam is cooled, it is transmitted back into the boiler 9 through the conduit 7 to form a cycle. Inside the protection column 30, the bottom of the floating plate 32 is slidably connected, and the connecting rod 34 is vertically fixedly connected. When the inside of the boiler 9 reaches a certain amount, the floating plate 32 is automatically lifted, and water flows from the protection column 30 into the boiler 9 for heating, reducing gas consumption, reducing manpower, and improving the preheating utilization rate.

[0029] Next, the working principle of the cooling steam supply device based on the gas-steam combined cycle unit will be specifically described.

[0030] As Figures 1-4 shown, when the boiler 9 burns to generate steam, the gas is transmitted into the cylinder block 81 through the transmission valve 4. The cooler 84 is started. The cooler 84 is hermetically connected to the cooling pipe 82 through the transmission pipe 83. The cooler 84 injects the coolant into the cooling pipe 82 through the transmission pipe 83. After the coolant absorbs heat from the cylinder liner, it flows out from the other end of the cooling pipe 82, taking the heat away from the cylinder block 81 to complete the cooling. Thus, the gas inside the cylinder block 81 can be cooled, and the steam can be effectively and quickly cooled. When the steam is cooled, it is transmitted back into the boiler 9 through the conduit 7 to form a cycle. Inside the protection column 30, the bottom of the floating plate 32 is slidably connected, and the connecting rod 34 is vertically fixedly connected. When the inside of the boiler 9 reaches a certain amount, the floating plate 32 is automatically lifted, and water flows from the protection column 30 into the boiler 9 for heating, reducing gas consumption, reducing manpower, and improving the preheating utilization rate.

[0031] The above has generally described the present invention in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, the modifications or improvements made without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A cooling steam supply device for a gas-steam combined cycle unit, comprising a box body (1), characterized in that: An automatic water discharge mechanism (3) is installed on the surface of the box body (1). A boiler (9) is installed inside the box body (1). A heater (2) is installed at the rear side of the boiler (9). A combustion assisting mechanism (6) is installed at the front side of the boiler (9). A transmission valve (4) is installed at the top of the boiler (9). One end of the transmission valve (4) is installed with a pipeline (5). One end of the pipeline (5) is fixedly connected to a low-pressure cylinder (8). A conduit (7) is installed at the front side of the low-pressure cylinder (8). The combustion assisting mechanism (6) includes a combustion assisting turbine (60). The combustion assisting turbine (60) is installed on one side of the boiler (9). A gas pipe (61) is installed at one end of the combustion assisting turbine (60).

2. The cooling steam supply device based on a gas-steam combined cycle unit according to claim 1, characterized in that: An installation box (62) is installed on the surface of the combustion assisting turbine (60). An air suction shell (64) is installed at the top of the installation box (62). A filter plate (63) is installed on the surface of the air suction shell (64).

3. The cooling steam supply device based on a gas-steam combined cycle unit according to claim 1, characterized in that: The low-pressure cylinder (8) includes a shell (80). The shell (80) is installed on one side of the box body (1). A cylinder block (81) is installed inside the shell (80).

4. The cooling steam supply device based on a gas-steam combined cycle unit according to claim 3, characterized in that: A cooling pipe (82) is installed on the surface of the cylinder block (81). One end of the cooling pipe (82) is fixedly connected to a transfer conduit (83). One end of the transfer conduit (83) is fixedly connected to a cooler (84).

5. The cooling steam supply device based on a gas-steam combined cycle unit according to claim 1, characterized in that: The heater (2) includes a protection column (30). The protection column (30) is installed on the surface of the box body (1). An air leakage hole (31) is opened on the top surface of the protection column (30). Two water inlets (33) with a trumpet-shaped cross-section are opened on the side wall of the protection column (30). A water discharge port (38) is opened at the bottom of the protection column (30). The protection column (30) penetrates and communicates with the boiler (9).

6. The cooling steam supply device based on a gas-steam combined cycle unit according to claim 5, characterized in that: A floating plate (32) is slidably connected inside the protection column (30). A connecting rod (34) is vertically fixedly connected to the bottom of the floating plate (32).

7. The cooling steam supply device based on a gas-steam combined cycle unit according to claim 6, characterized in that: A sealing plate (35) is fixedly connected to the surface of the connecting rod (34). A baffle (37) is fixedly connected to one end of the connecting rod (34).

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