Sealing water return system for water feeding pump of thermal power plant

Abstract

The utility model relates to the technical field of water return systems of water feed pumps, in particular to a sealing water return system of a water feed pump of a thermal power plant, which provides redundancy when a water seal of the system is damaged, prolongs the operation time of workers and improves the usability of the system by arranging a labyrinth pipe and performing labyrinth sealing on the system. When the system water seal is damaged, the system is closed, the vacuum state of other parts of the system is maintained, loss is reduced, maintenance is convenient, and the maintainability of the system is improved; comprising a body; the water return device, the water seal device and the analysis deoxygenization device are all installed on the machine body, and the two labyrinth pipes and the two sets of electric control valves are all installed on the water return device.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of water supply pump backwater system, in particular to a kind of sealing water backwater system of water supply pump of thermal power plant. BACKGROUND

[0002] To reduce resource waste, the sealing water of water supply pump of thermal power plant usually needs to be recycled to condenser inside.

[0003] For example, a kind of sealing water backwater system of water supply pump of thermal power plant of Chinese utility model patent for representative one class of prior art with announcement number CN207881508U, its main structure includes water seal cylinder, electric flow regulating valve and waveguide radar liquid level meter, water seal cylinder is sealed to system, electric flow regulating valve adjusts the water level in water seal cylinder, and waveguide radar liquid level meter measures the water level height in water seal cylinder.

[0004] But the existing system still has the following problems when using: the existing water seal device is in water seal destruction, and the water inlet speed is fast, the worker reaction time is short, the system usability is poor, and the existing water seal device is easy to make the system mechanical parts inside a large amount of water after water seal destruction, is not convenient for repair, and the system maintenance is poor. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a kind of sealing water backwater system of water supply pump of thermal power plant by setting labyrinth pipe, labyrinth seal is carried out to system, redundancy is provided when system water seal is destroyed, worker operation time is extended, system usability is improved, and by setting electric control valve, system is closed when system water seal is destroyed, the vacuum state of the rest of system is maintained, loss is reduced, repair is facilitated, and the easy maintenance of system is improved.

[0006] The utility model provides a kind of sealing water backwater system of water supply pump of thermal power plant, including fuselage;Still include backwater device, two labyrinth pipes, two groups of electric control valves, water seal device and analytic deoxidizing device, backwater device, water seal device and analytic deoxidizing device are all installed on fuselage, two labyrinth pipes and two groups of electric control valves are all installed on backwater device;Fuselage provides support, backwater device carries backwater, labyrinth pipe provides redundancy when water seal breaks through, electric control valve is automatically controlled to the water amount in backwater device, water seal device is sealed to backwater device, and analytic deoxidizing device is deoxidized to the water in backwater device.

[0007] Preferably, the fuselage includes a bottom plate and a plurality of supports, and the plurality of supports are installed at the top end of the bottom plate.

[0008] Preferably, the water return device comprises a water supply pump, a water return pipe, a condenser and a water supply pipe, the water supply pump is installed on the plurality of supports, the condenser is installed on the top end of the bottom plate, the water return pipe and the water supply pipe are both installed on the water supply pump and the condenser, and the water supply pump, the water return pipe, the condenser and the water supply pipe are all communicated; the water in the water supply pump is driven to move to the condenser by the water return pipe to complete water return, and flows back to the water supply pump through the water supply pipe, thereby sealing the water supply pump, reducing the oxygen content in the loop, and prolonging the machine use time.

[0009] Preferably, the two labyrinth pipes are both communicated and installed on the water return pipe; the labyrinth pipes provide redundancy when the water seal of the water return pipe is damaged, prolong the worker operation time, and improve the system usability.

[0010] Preferably, the two groups of electric control valves are respectively installed at the front and rear ends of the two labyrinth pipes; the electric control valves control the water inflow and outflow of the labyrinth pipes, close the labyrinth pipes when the water seal is damaged, maintain the vacuum state of the rest of the system, reduce the loss, facilitate maintenance, and improve the maintainability of the system.

[0011] Preferably, the water seal device comprises a water seal cylinder outer wall, a water seal cylinder top cover, a water seal cylinder inner wall, a water inlet pipe and a valve, the water seal cylinder outer wall is installed on the top end of the bottom plate, the top of the water seal cylinder outer wall is provided with an overflow port and a water inlet port, the water seal cylinder top cover is installed on the top end of the water seal cylinder outer wall, the water return pipe is connected to the water seal cylinder outer wall and the water seal cylinder top cover respectively, the water seal cylinder inner wall is installed on the bottom end of the water seal cylinder outer wall, the water inlet pipe is installed at the water inlet port, and the valve is installed on the water inlet pipe; the water seal cylinder outer wall, the water seal cylinder top cover and the water seal cylinder inner wall are filled with water to seal the water return pipe, the water inlet pipe supplies water to the water seal cylinder outer wall, and the valve closes the water inlet pipe.

[0012] Preferably, the resolving deoxidizing device comprises a gas tank, a resolving deoxidizer shell, a gas pipe I, a gear pump, a speed reducer, a motor and a gas pipe II, the gas tank is installed at the top end of the bottom plate, the resolving deoxidizer shell is installed at the top end of the gas tank, and the resolving deoxidizer shell is communicated and installed on the water supply pipe, the inside of the resolving deoxidizer shell is provided with a nozzle, a gas-water separation plate and a deoxidizing filler plate from bottom to top, and the nozzle is communicated with the water supply pipe, the gas pipe I is communicated and installed on the gas tank and the resolving deoxidizer shell, the gear pump is installed at the top end of the resolving deoxidizer shell, the speed reducer is fixedly installed at the side end of the gear pump, the motor is fixedly installed at the side end of the speed reducer, and the motor provides power to the gear pump through the speed reducer, and the gas pipe II is communicated and installed on the gear pump and the gas tank; the gas tank inputs deoxidizing gas into the inside of the resolving deoxidizer shell, the nozzle of the resolving deoxidizer shell uniformly sprays water into the inside of the resolving deoxidizer shell, the deoxidizing gas dissolves oxygen in the water, then the deoxidizing gas filters out water at the gas-water separation plate of the resolving deoxidizer shell, removes the dissolved oxygen at the deoxidizing filler plate of the resolving deoxidizer shell, then the motor is turned on, the motor provides power to drive the gear pump to run and transport the deoxidizing gas in the inside of the resolving deoxidizer shell to the gas tank, so that the water is continuously deoxidized.

[0013] Compared with the prior art, the beneficial effects of the utility model are that the system can be labyrinth sealed, redundancy is provided when the system water seal is damaged, the worker operates for a long time, the system has good usability, the system can be closed when the system water seal is damaged, the vacuum state of the rest of the system is maintained, loss is small, maintenance is convenient, and the system has good maintainability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the axonometric structure schematic diagram of the utility model;

[0015] Figure 2 is the axonometric structure schematic diagram of the fuselage, the water return device and the labyrinth pipe etc.;

[0016] Figure 3 is the axonometric section structure schematic diagram of the fuselage, the water return device and the labyrinth pipe etc.;

[0017] Figure 4 is the axonometric structure schematic diagram of the resolving deoxidizing device.

[0018] Markings in the drawings: 01, fuselage; 11, bottom plate; 12, support; 02, water return device; 21, water supply pump; 22, water return pipe; 23, condenser; 24, water supply pipe; 03, labyrinth pipe; 04, electric control valve; 05, water seal device; 51, water seal cylinder outer wall; 52, water seal cylinder top cover; 53, water seal cylinder inner wall; 54, water inlet pipe; 55, valve; 06, resolving deoxidizing device; 61, gas tank; 62, resolving deoxidizer shell; 63, gas pipe I; 64, gear pump; 65, speed reducer; 66, motor; 67, gas pipe II. DETAILED DESCRIPTION

[0019] For the purpose of facilitating the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The present application can be realized in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present application will be more thorough and complete.

[0020] Embodiment 1

[0021] As shown in Figure 1 , it comprises a body 01; further comprising a backwater device 02, two labyrinth pipes 03, two groups of electric control valves 04, a water seal device 05 and an analytical deoxidizing device 06, the backwater device 02, the water seal device 05 and the analytical deoxidizing device 06 are all installed on the body 01, the two labyrinth pipes 03 and the two groups of electric control valves 04 are all installed on the backwater device 02; the body 01 provides support, the backwater device 02 backwaters, the labyrinth pipe 03 provides redundancy when the water seal breaks, the electric control valve 04 automatically controls the water quantity in the backwater device 02, the water seal device 05 seals the water of the backwater device 02, and the analytical deoxidizing device 06 deoxidizes the water in the backwater device 02;

[0022] As shown in Figure 2 and Figure 3 , the body 01 comprises a bottom plate 11 and a plurality of supports 12, and the plurality of supports 12 are all installed on the top end of the bottom plate 11;

[0023] As shown in Figure 2 and Figure 3 , the backwater device 02 comprises a feed water pump 21, a backwater pipe 22, a condenser 23 and a feed water pipe 24, the feed water pump 21 is installed on the plurality of supports 12, the condenser 23 is installed on the top end of the bottom plate 11, and the backwater pipe 22 and the feed water pipe 24 are both installed on the feed water pump 21 and the condenser 23, and the interiors of the feed water pump 21, the backwater pipe 22, the condenser 23 and the feed water pipe 24 are all communicated;

[0024] As shown in Figure 2 and Figure 3 , the two labyrinth pipes 03 are both installed in communication on the backwater pipe 22;

[0025] As shown in Figure 2 and Figure 3 , the two groups of electric control valves 04 are respectively installed at the front and rear ends of the two labyrinth pipes 03;

[0026] As shown in Figure 2 and Figure 3As shown, the water seal device 05 includes an outer wall 51 of the water seal cylinder, a top cover 52 of the water seal cylinder, an inner wall 53 of the water seal cylinder, an inlet pipe 54, and a valve 55. The outer wall 51 of the water seal cylinder is installed at the top of the base plate 11. An overflow port and an inlet are provided at the top of the outer wall 51 of the water seal cylinder. The top cover 52 of the water seal cylinder is installed at the top of the outer wall 51 of the water seal cylinder, and the return pipe 22 is connected to the outer wall 51 of the water seal cylinder and the top cover 52 of the water seal cylinder respectively. The inner wall 53 of the water seal cylinder is installed at the bottom of the outer wall 51 of the water seal cylinder. The inlet pipe 54 is installed at the inlet, and the valve 55 is installed on the inlet pipe 54.

[0027] First, open valve 55 to fill water into the outer wall 51, top cover 52, and inner wall 53 of the water seal cylinder through inlet pipe 54, thus sealing the return pipe 22. When water overflows from the overflow port of the outer wall 51 of the water seal cylinder, the water seal is complete. Then, turn on feed water pump 21. Feed water pump 21 drives the internal water to move through return pipe 22 to condenser 23 to complete the return water, and then flows back to feed water pump 21 through feed water pipe 24 to seal feed water pump 21, reducing the oxygen content in the circuit and extending the machine's service life. When the water seal is broken, labyrinth tube 03 provides a labyrinth seal for return pipe 22, providing redundancy when the water seal of return pipe 22 is broken, extending the operator's operation time, and improving system usability.

[0028] Example 2

[0029] In addition to Example 1, it also includes:

[0030] like Figure 4 As shown, the deoxygenation device 06 includes a gas tank 61, a deoxygenator housing 62, a first gas pipe 63, a gear pump 64, a reducer 65, a motor 66, and a second gas pipe 67. The gas tank 61 is installed on the top of the base plate 11, and the deoxygenator housing 62 is installed on the top of the gas tank 61. The deoxygenator housing 62 is connected to the water supply pipe 24. Inside the deoxygenator housing 62, from bottom to top, there are nozzles, a gas-water separation plate, and a deoxygenation packing plate. The nozzles are connected to the water supply pipe 24. The first gas pipe 63 is connected to the gas tank 61 and the deoxygenator housing 62. The gear pump 64 is installed on the top of the deoxygenator housing 62. The reducer 65 is fixedly installed on the side of the gear pump 64. The motor 66 is fixedly installed on the side of the reducer 65. The motor 66 provides power to the gear pump 64 through the reducer 65. The second gas pipe 67 is connected to the gear pump 64 and the gas tank 61.

[0031] First open the valve 55, through the water inlet pipe 54 to the water seal cylinder outer wall 51, water seal cylinder top cover 52 and water seal cylinder inner wall 53 in the water, to the backwater pipe 22 water seal, when the water from the overflow of water seal cylinder outer wall 51 overflow, it is water seal, after opening the water pump 21, water pump 21 drive inside the water from the backwater pipe 22 to the condenser 23 complete backwater, and through the water pipe 24 back to the water pump 21, to the water pump 21 seal, at the same time the gas tank 61 will be deaerated gas into the analysis deaerator shell 62 inside, the nozzle of the analysis deaerator shell 62 will be evenly sprayed to the analysis deaerator shell 62 inside, the deaerated gas will dissolve the oxygen in the water, after the deaerated gas in the analysis deaerator shell 62 gas water separation plate filter water, at the analysis deaerator shell 62 deaerating filler plate to remove dissolved oxygen, then open the motor 66, the motor 66 provides power, drive gear pump 64 operation will be deaerated gas in the analysis deaerator shell 62 to the gas tank 61, realize the continuous deaeration of water, reduce the oxygen content in the loop, prolong the machine use time, when the water seal damage, the labyrinth pipe 03 to the backwater pipe 22 labyrinth seal, provide redundancy when the backwater pipe 22 water seal damage, prolong the operation time of workers, improve the system usability, electric control valve 04 control the amount of water flowing into and out of the labyrinth pipe 03, when the water seal damage, close the labyrinth pipe 03, maintain the vacuum state of the rest of the system, reduce the loss, convenient maintenance, improve the system maintainability.

[0032] As Figures 1 to 4As shown, the utility model discloses a kind of sealing water return system of thermal power plant feed pump, when working, first open valve 55, water is filled in water seal cylinder outer wall 51, water seal cylinder top cover 52 and water seal cylinder inner wall 53 by inlet pipe 54, water seal is carried out to return pipe 22, when water overflows from the overflow port of water seal cylinder outer wall 51, it is water seal completion, then open feed pump 21, water in the inside of feed pump 21 is moved to condenser 23 by return pipe 22 by drive, and return to feed pump 21 by feed pipe 24, seal feed pump 21, while gas tank 61 imports deaerating gas into resolving deaerator shell 62 inside, and the nozzle of resolving deaerator shell 62 is uniformly sprayed to resolving deaerator shell 62 inside, and deaerating gas is filtered to remove water at the gas-water separation plate of resolving deaerator shell 62, and dissolved oxygen is removed at the deaerating filler plate of resolving deaerator shell 62, then open motor 66, and motor 66 provides power, drives gear pump 64 to operate and transports deaerating gas in resolving deaerator shell 62 to gas tank 61, realizes continuous deaeration to water, reduces the oxygen content in loop, prolongs machine use time, when water seal is damaged, labyrinth pipe 03 carries out labyrinth seal to return pipe 22, provides redundancy when water seal in return pipe 22 is damaged, prolongs worker operation time, improves system usability, and electric control valve 04 controls the amount of water flowing into and out of labyrinth pipe 03, closes labyrinth pipe 03 when water seal is damaged, maintains the vacuum state of the rest of the system, reduces loss, facilitates maintenance, and improves the maintainability of the system.

[0033] The feed pump 21, the condenser 23, the two groups of electric control valves 04, the valve 55, the gas-water separation plate, the deaerating filler plate, the gear pump 64 and the motor 66 are purchased on the market, and the technical personnel in the industry only need to install and operate according to the attached instruction manual, without the creative labor of the technical personnel in the field.

[0034] The utility model realizes the main function as follows: the labyrinth pipe 03 is arranged to seal the system in a labyrinth manner, to provide redundancy when the water seal of the system is damaged, prolong the worker operation time, improve the system usability, and the electric control valve 04 is arranged to close the system when the water seal is damaged, maintain the vacuum state of the rest of the system, reduce the loss, facilitate maintenance, and improve the maintainability of the system.

[0035] The above merely is the preferred implementation manner of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A thermal power plant feed water pump seal water return system, comprising a machine body (01) ; characterized in that, The water return device (02), the two labyrinth pipes (03), the two groups of electric control valves (04), the water seal device (05) and the analytic deoxygenization device (06) are all installed on the machine body (01), and the two labyrinth pipes (03) and the two groups of electric control valves (04) are both installed on the water return device (02).

2. A system for sealing water return for feed water pumps in a thermal power plant according to claim 1, characterized in that, The machine body (01) comprises a bottom plate (11) and a plurality of supports (12), and the plurality of supports (12) are all installed on the top end of the bottom plate (11).

3. A system for sealing water of feed water pumps of a thermal power plant according to claim 2, characterized in that, The water return device (02) comprises a water supply pump (21), a water return pipe (22), a condenser (23) and a water supply pipe (24), the water supply pump (21) is installed on the plurality of supports (12), the condenser (23) is installed on the top end of the bottom plate (11), the water return pipe (22) and the water supply pipe (24) are both installed on the water supply pump (21) and the condenser (23), and the water supply pump (21), the water return pipe (22), the condenser (23) and the water supply pipe (24) are all communicated.

4. A system for sealing water of feed water pumps of a thermal power plant according to claim 3, characterized in that, The two labyrinth pipes (03) are both communicated and installed on the water return pipe (22).

5. A fossil plant feed water pump seal water return system as set forth in claim 4, characterized by, The two groups of electric control valves (04) are respectively installed on the front and rear ends of the two labyrinth pipes (03).

6. A system for sealing water of feed water pumps of a thermal power plant according to claim 3, characterized in that, The water seal device (05) comprises a water seal cylinder outer wall (51), a water seal cylinder top cover (52), a water seal cylinder inner wall (53), a water inlet pipe (54) and a valve (55), the water seal cylinder outer wall (51) is installed on the top end of the bottom plate (11), the top of the water seal cylinder outer wall (51) is provided with an overflow port and a water inlet port, the water seal cylinder top cover (52) is installed on the top end of the water seal cylinder outer wall (51), the water return pipe (22) is connected to the water seal cylinder outer wall (51) and the water seal cylinder top cover (52) respectively, the water seal cylinder inner wall (53) is installed on the bottom end of the water seal cylinder outer wall (51), the water inlet pipe (54) is installed at the water inlet port, and the valve (55) is installed on the water inlet pipe (54).

7. A system for sealing water of feed water pumps of a thermal power plant according to claim 3, characterized in that, The analytic deoxidizing device (06) includes a gas tank (61), an analytic deoxidizer shell (62), a gas pipe I (63), a gear pump (64), a speed reducer (65), a motor (66) and a gas pipe II (67), the gas tank (61) is installed at the top end of the bottom plate (11), the analytic deoxidizer shell (62) is installed at the top end of the gas tank (61), and the analytic deoxidizer shell (62) is communicated and installed on the water supply pipe (24), the analytic deoxidizer shell (62) is internally provided with a nozzle, a gas-water separation plate and a deoxidizing filler plate from bottom to top, and the nozzle is communicated with the water supply pipe (24), the gas pipe I (63) is communicated and installed on the gas tank (61) and the analytic deoxidizer shell (62), the gear pump (64) is installed at the top end of the analytic deoxidizer shell (62), the speed reducer (65) is fixedly installed at the side end of the gear pump (64), the motor (66) is fixedly installed at the side end of the speed reducer (65), and the motor (66) provides power to the gear pump (64) through the speed reducer (65), and the gas pipe II (67) is communicated and installed on the gear pump (64) and the gas tank (61).

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