A hydrogen exhaust device for a generator

Abstract

The invention discloses a generator hydrogen discharge device, which includes: an exhaust pipe, a hydrogen detector, a circulating water tank, a hydrogen cooler, a steam-water sampling cooler, a water supply device, a water return device and a hydrogen buffer tank, wherein the exhaust pipe is connected to the circulating water tank, the hydrogen detector is connected to the exhaust pipe, the hydrogen cooler is connected to the circulating water tank, and the hydrogen cooler is also connected to the steam-water sampling cooler, one end of the hydrogen buffer tank is connected to the hydrogen cooler, the other end of the hydrogen buffer tank is connected to the circulating water tank, and the hydrogen buffer tank is also connected to the steam-water sampling cooler, one end of the steam-water sampling cooler is connected to the water supply device, and the other end is connected to the water return device. The invention can thoroughly collect the hydrogen leaked into the closed cold water pipeline in the hydrogen cooler and lead it out of the roof of the factory building, reducing the risk of hydrogen explosion. At the same time, the invention adds a hydrogen detection device, which can timely alarm when hydrogen leakage is found, report to the operating personnel for quick processing, and further increase safety.

Description

Technical Field

[0001] The invention relates to the field of generators, and in particular to a hydrogen exhaust device for a generator. Background Art

[0002] Since the late 1930s, generators with a capacity greater than 50MW have gradually transitioned from air cooling to hydrogen cooling. Hydrogen has a low density, which is only 1 / 14 of that of air, and a thermal conductivity that is 7 times that of air. At the same temperature and flow rate, the heat release coefficient is 14-15 times that of air. Therefore, modern large-capacity steam turbine generators are almost all cooled by hydrogen. There are two types of hydrogen cooling: hydrogen cooling and water-hydrogen-hydrogen cooling.

[0003] The function of the closed cooling water is to provide cooling water to the auxiliary equipment in the power station, using a closed circulation loop. Hydrogen has a strong penetrating ability. If there are slight cracks or sand holes in the welds or pipes in the generator hydrogen cooler, hydrogen will penetrate into the closed cooling water pipeline and diffuse along the cooling water to other auxiliary equipment in the power plant. When it diffuses to auxiliary equipment working under high temperature conditions, such as the steam-water sampling cooler, it may cause a hydrogen explosion and endanger the safety of the system and equipment. Nuclear power units have large unit capacity (1000MW~1750MW) and large hydrogen flow, and the amount of leaked and accumulated hydrogen is much larger, and the risk of hydrogen explosion is significantly increased.

[0004] The existing technology is to connect a DN25 drain pipe at the high position of each cooling water pipe (6-8 pipes) on the outlet of the hydrogen cooler body to lead the hydrogen overflowing from the pipe to the roof of the plant. However, the pipe diameter of the existing technology is too small, the hydrogen discharge capacity is weak, and it is not suitable for large-capacity nuclear power units. Summary of the invention

[0005] The object of the present invention is to provide a generator hydrogen discharge device to solve the problems mentioned in the above background technology that the existing hydrogen discharge device has too small a pipe diameter, weak hydrogen discharge capacity, and is not suitable for large-capacity nuclear power units.

[0006] In order to solve the above problems, the present invention discloses a generator hydrogen discharge device, which includes: an exhaust pipe, a hydrogen detector, a circulating water tank, a hydrogen cooler, a steam-water sampling cooler, a water supply device, a water return device and a hydrogen buffer tank, wherein the exhaust pipe is connected to the circulating water tank, the hydrogen detector is connected to the exhaust pipe, the hydrogen cooler is connected to the circulating water tank, and the hydrogen cooler is also connected to the steam-water sampling cooler, one end of the hydrogen buffer tank is connected to the hydrogen cooler, the other end of the hydrogen buffer tank is connected to the circulating water tank, and the hydrogen buffer tank is also connected to the steam-water sampling cooler, the steam-water sampling cooler and the hydrogen cooler are arranged opposite to each other, one end of the steam-water sampling cooler is connected to the water supply device, and the other end is connected to the water return device.

[0007] As a preferred embodiment, the hydrogen buffer tank also includes a tank body, a drain port, an air inlet, a water inlet pipe, a water outlet pipe and a manhole, the drain port is opened on the top of the tank body, the air inlet is evenly opened on the surface of the tank body, the water inlet pipe and the water outlet pipe are both connected to the tank body, and the water inlet pipe is connected to the water outlet pipe, and the manhole is opened on one side of the tank body.

[0008] As a preferred embodiment, the number of the air inlets is eight, and the eight air inlets are evenly arranged on the surface of the tank body; the hydrogen cooler is also connected to connecting water pipes, the number of the connecting water pipes is eight, the eight connecting water pipes are arranged corresponding to the air inlets, and the eight air inlets are connected to the eight connecting water pipes.

[0009] As a preferred solution, the bottom of the tank body is further connected with support columns, the number of the support columns is three, and the three support columns are evenly connected to the bottom of the tank body.

[0010] As a preferred solution, a pump body and an electric control valve are further provided between the hydrogen buffer tank and the circulating water tank. The number of the electric control valves is two, and the two electric control valves are respectively connected to the two ends of the pump body.

[0011] As a preferred embodiment, it also includes a manual control valve, which includes: a first manual control valve, a second manual control valve, a third manual control valve, a fourth manual control valve, a fifth manual control valve and a sixth manual control valve. The first manual control valve is arranged between the circulating water tank and the electric control valve, the second manual control valve is arranged between the pump body and the electric control valve, the third manual control valve is arranged between the hydrogen cooler and the electric control valve, the fourth manual control valve is arranged between the circulating water tank and the hydrogen buffer tank, the fifth manual control valve is arranged between the return water device and the steam-water sampling cooler, and the sixth manual control valve is arranged between the water inlet and the steam-water sampling cooler.

[0012] The invention discloses a generator hydrogen discharge device, which includes: an exhaust pipe, a hydrogen detector, a circulating water tank, a hydrogen cooler, a steam-water sampling cooler, a water supply device, a water return device and a hydrogen buffer tank, wherein the exhaust pipe is connected to the circulating water tank, the hydrogen detector is connected to the exhaust pipe, the hydrogen cooler is connected to the circulating water tank, and the hydrogen cooler is also connected to the steam-water sampling cooler, one end of the hydrogen buffer tank is connected to the hydrogen cooler, the other end of the hydrogen buffer tank is connected to the circulating water tank, and the hydrogen buffer tank is also connected to the steam-water sampling cooler, one end of the steam-water sampling cooler is connected to the water supply device, and the other end is connected to the water return device. The invention can thoroughly collect the hydrogen leaked into the closed cold water pipeline in the hydrogen cooler and lead it out of the roof of the factory building, reducing the risk of hydrogen explosion. At the same time, the invention adds a hydrogen detection device, which can timely alarm when hydrogen leakage is found, report to the operating personnel for quick processing, and further increase safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is one of the structural schematic diagrams of a hydrogen exhaust device for a generator according to the present invention;

[0014] Figure 2 This is one of the structural schematic diagrams of a generator hydrogen exhaust device of the present invention.

[0015] In the figure:

[0016] 1. Exhaust pipe;

[0017] 2. Hydrogen detector;

[0018] 3. Circulating water tank;

[0019] 4. Hydrogen cooler; 41. Connect water pipe;

[0020] 5. Soda sampling cooler;

[0021] 6. Water supply device;

[0022] 7. Water return device;

[0023] 8. Hydrogen buffer tank; 81. Tank body; 82. Drain port; 83. Air inlet; 84. Water inlet pipe; 85. Water outlet pipe; 86. Manhole; 87. Support column;

[0024] 9. Pump body;

[0025] 10. Electric control valve;

[0026] 11. Manual control valve; 111. First manual control valve; 112. Second manual control valve; 113. Third manual control valve; 114. Fourth manual control valve; 115. Fifth manual control valve; 116. Sixth manual control valve. DETAILED DESCRIPTION

[0027] 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.

[0028] like Figure 1-2 As shown, the present invention discloses a generator hydrogen discharge device, which includes: an exhaust pipe 1, a hydrogen detector 2, a circulating water tank 3, a hydrogen cooler 4, a steam-water sampling cooler 5, a water supply device 6, a water return device 7 and a hydrogen buffer tank 8, the exhaust pipe 1 is connected to the circulating water tank 3, the hydrogen detector 2 is connected to the exhaust pipe 1, the hydrogen cooler 4 is connected to the circulating water tank 3, and the hydrogen cooler 4 is also connected to the steam-water sampling cooler 5, one end of the hydrogen buffer tank 8 is connected to the hydrogen cooler 4, the other end of the hydrogen buffer tank 8 is connected to the circulating water tank 3, and the hydrogen buffer tank 8 is also connected to the steam-water sampling cooler 5, the steam-water sampling cooler 5 and the hydrogen cooler 4 are arranged opposite to each other, one end of the steam-water sampling cooler 5 is connected to the water supply device 6, and the other end is connected to the water return device 7. The present invention can thoroughly collect the hydrogen leaking into the closed cold water pipe from the hydrogen cooler and lead it out of the roof of the plant, reducing the risk of hydrogen explosion. At the same time, the present invention adds a hydrogen detection device to promptly alarm when hydrogen leakage is found and report it to the operating personnel for quick processing, thereby further increasing safety.

[0029] It should be noted here that the present invention provides a hydrogen detector 2 which is arranged at the highest point of the device. When hydrogen leakage is detected, an alarm is given in time and reported to the operating personnel for prompt processing, thereby further increasing safety.

[0030] As a preferred embodiment, the hydrogen buffer tank 8 also includes a tank body 81, a drain port 82, an air inlet 83, a water inlet pipe 84, a water outlet pipe 85 and a manhole 86. The drain port 82 is opened at the top of the tank body 81, the air inlet 83 is evenly opened on the surface of the tank body, the water inlet pipe 84 and the water outlet pipe 85 are both connected to the tank body 81, and the water inlet pipe 84 is connected to the water outlet pipe 85, and the manhole 86 is opened on one side of the tank body 83.

[0031] It should be noted here that the water inlet and outlet method of the hydrogen buffer tank 8 of the present invention is top-in and bottom-out, and the drain port 83 is opened on the top of the tank body 81, and the water is discharged uniformly to the roof of the factory building through the drain port 83. The pipeline is short and the risk of hydrogen explosion is reduced. At the same time, the present invention provides a manhole 86 on the side of the tank body 81 to facilitate maintenance and inspection.

[0032] As a preferred solution, the number of air inlets 83 is eight, and the eight air inlets 83 are evenly arranged on the surface of the tank body 81; the hydrogen cooler 4 is also connected to connecting water pipes 41, the number of connecting water pipes 41 is eight, the eight connecting water pipes 41 are arranged corresponding to the air inlets 83, and the eight air inlets 83 are connected to the eight connecting water pipes 41.

[0033] It should be noted here that the connecting water pipe 41 of the present invention is directly connected to the hydrogen cooler 4, which simplifies the layout.

[0034] As a preferred solution, the bottom of the tank body 83 is further connected with support columns 87 , the number of the support columns 87 is three, and the three support columns 87 are evenly connected to the bottom of the tank body 83 .

[0035] As a preferred solution, a pump body 9 and an electric control valve 10 are further provided between the hydrogen buffer tank 8 and the circulating water tank. There are two electric control valves 10 , which are respectively connected to both ends of the pump body 9 .

[0036] It should be noted here that the present invention simplifies the control process by providing the electric control valve 10 .

[0037] As a preferred solution, a manual control valve 11 is also included, and the manual control valve 11 also includes: a first manual control valve 111, a second manual control valve 112, a third manual control valve 113, a fourth manual control valve 114, a fifth manual control valve 115 and a sixth manual control valve 116. The first manual control valve 111 is arranged between the circulating water tank 3 and the electric control valve 10, the second manual control valve 112 is arranged between the pump body 9 and the electric control valve 10, the third manual control valve 113 is arranged between the hydrogen cooler 4 and the electric control valve 10, the fourth manual control valve is arranged between the circulating water tank 3 and the hydrogen buffer tank 8, the fifth manual control valve 115 is arranged between the return water device 7 and the steam-water sampling cooler 5, and the sixth manual control valve 116 is arranged between the water inlet and the steam-water sampling cooler 5.

[0038] It should be noted here that the present invention ensures the safety of operation by providing a plurality of manual control valves 11 .

[0039] The working process of the present invention is as follows: the closed cooling water flows from the circulating water tank 3 into the hydrogen cooler 4, or flows into the hydrogen cooler 4 through the water supply device 6, and at the same time, the water of the water supply device 6 flows into the steam-water sampling cooler 5 for sampling and testing, and then flows into the return water device 7 after the testing is completed. The water in the hydrogen cooler 4 flows into the hydrogen buffer tank 8 through the water inlet pipe 84, and then flows out from the water outlet pipe 85 to the return water device 7 to perform the return water and water supply process. At the same time, the hydrogen in the hydrogen cooler 4 enters the hydrogen buffer tank 8 through the connecting water pipe 41, and the hydrogen in the hydrogen buffer tank 8 is discharged through the exhaust port 82. In addition, the hydrogen monitor is set at the highest point of the entire closed cooling water system, and hydrogen will gather here. When it is detected that the hydrogen content exceeds the standard, an alarm is triggered in time and reported to the operating personnel for quick processing.

[0040] In summary, the present invention discloses a generator hydrogen discharge device, which includes: an exhaust pipe, a hydrogen detector, a circulating water tank, a hydrogen cooler, a steam-water sampling cooler, a water supply device, a water return device and a hydrogen buffer tank, wherein the exhaust pipe is connected to the circulating water tank, the hydrogen detector is connected to the exhaust pipe, the hydrogen cooler is connected to the circulating water tank, and the hydrogen cooler is also connected to the steam-water sampling cooler, one end of the hydrogen buffer tank is connected to the hydrogen cooler, the other end of the hydrogen buffer tank is connected to the circulating water tank, and the hydrogen buffer tank is also connected to the steam-water sampling cooler, one end of the steam-water sampling cooler is connected to the water supply device, and the other end is connected to the water return device. The present invention can thoroughly collect the hydrogen leaked into the closed cold water pipeline in the hydrogen cooler and lead it out of the roof of the factory building, reducing the risk of hydrogen explosion. At the same time, the present invention adds a hydrogen detection device, which can timely alarm when hydrogen leakage is found, report to the operating personnel for quick processing, and further increase safety.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A generator hydrogen exhaust device, characterized in that: include: An exhaust pipe, a hydrogen detector, a circulating water tank, a hydrogen cooler, a soda sampling cooler, a water supply device, a water return device and a hydrogen buffer tank, wherein the exhaust pipe is connected to the circulating water tank, the hydrogen detector is connected to the exhaust pipe, the hydrogen cooler is connected to the circulating water tank, and the hydrogen cooler is also connected to the soda sampling cooler, one end of the hydrogen buffer tank is connected to the hydrogen cooler, the other end of the hydrogen buffer tank is connected to the circulating water tank, and the hydrogen buffer tank is also connected to the soda sampling cooler, the soda sampling cooler is arranged opposite to the hydrogen cooler, one end of the soda sampling cooler is connected to the water supply device, and the other end is connected to the water return device; The hydrogen buffer tank further comprises a tank body, an emptying port, an air inlet, a water inlet pipe, a water outlet pipe and a manhole, wherein the emptying port is provided at the top of the tank body, the air inlet is evenly provided at the surface of the tank body, the water inlet pipe and the water outlet pipe are both connected to the tank body, and the water inlet pipe is connected to the water outlet pipe, and the manhole is provided at one side of the tank body; A pump body and an electric control valve are also arranged between the hydrogen buffer tank and the circulating water tank. The number of the electric control valves is two, and the two electric control valves are respectively connected to the two ends of the pump body.

2. The hydrogen exhaust device for a generator according to claim 1, characterized in that: The number of the air inlets is eight, and the eight air inlets are evenly arranged on the surface of the tank body; the hydrogen cooler is also connected to connecting water pipes, the number of the connecting water pipes is eight, the eight connecting water pipes are arranged corresponding to the air inlets, and the eight air inlets are connected to the eight connecting water pipes.

3. The hydrogen exhaust device for a generator according to claim 1, characterized in that: The bottom of the tank body is also connected with support columns, the number of the support columns is three, and the three support columns are evenly connected to the bottom of the tank body.

4. The hydrogen exhaust device for a generator according to claim 1, characterized in that: It also includes manual control valves, which include: a first manual control valve, a second manual control valve, a third manual control valve, a fourth manual control valve, a fifth manual control valve and a sixth manual control valve. The first manual control valve is arranged between the circulating water tank and the electric control valve, the second manual control valve is arranged between the pump body and the electric control valve, the third manual control valve is arranged between the hydrogen cooler and the electric control valve, the fourth manual control valve is arranged between the circulating water tank and the hydrogen buffer tank, the fifth manual control valve is arranged between the return water device and the steam-water sampling cooler, and the sixth manual control valve is arranged between the water inlet and the steam-water sampling cooler.

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