A power plant drum boiler continuous blowdown water temperature utilization device

Abstract

The utility model discloses a power plant drum boiler continuous discharge furnace water temperature utilization equipment, including boiler drum and boiler fixed discharge cooling pond, one end of boiler drum is connected with the continuous discharge expansion vessel main part that is equipped, the other end of continuous discharge expansion vessel main part is equipped with the boiler fixed discharge expansion vessel, the other end of boiler fixed discharge expansion vessel is connected with boiler fixed discharge cooling pond, and the continuous discharge expansion vessel main part is equipped with the continuous discharge expansion vessel drain to heating user manual door between boiler fixed discharge expansion vessel, the other end of continuous discharge expansion vessel drain to heating user manual door is connected with hot air curtain main part and steam heating main part respectively, and the other end of hot air curtain main part and steam heating main part is connected with boiler fixed discharge cooling pond. The utility model has the advantages compared with prior art: through change continuous discharge expansion vessel drain recovery path, when running in winter, through the changed hot air curtain and steam heating device steam inlet pipeline, utilize continuous discharge expansion vessel high temperature drain heat, reduce the heat source loss of boiler.

Description

Technical Field

[0001] This utility model relates to the field of power plant drum boiler technology, specifically to a device for utilizing the temperature of continuous grate boiler water in a power plant drum boiler. Background Technology

[0002] Continuous blowdown of boilers is one of the losses in the operation of steam drum boilers. In order to control the quality of boiler water and steam, boilers must carry out continuous blowdown, also known as surface blowdown. This requires continuously discharging a portion of the boiler water from the part with the highest salt and alkali concentration to reduce the salt content, alkali content, silica content and suspended slag content in the boiler water.

[0003] The existing boiler drum continuous blowdown first recovers a small amount of heat to the deaerator through simple flash evaporation in the continuous blowdown expansion tank, and then discharges the rest directly into the continuous blowdown cooling pool after depressurization and expansion in the fixed blowdown expansion tank, resulting in a huge waste of heat source. Utility Model Content

[0004] The technical problem to be solved by this utility model is the waste of heat source, and a device for utilizing the temperature of continuous grate boiler water in power plant steam drum boilers is provided.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a power plant boiler drum continuous grate boiler water temperature utilization device, including a boiler drum and a boiler fixed grate cooling tank, wherein a continuous grate expansion vessel body is connected to one end of the boiler drum, and a boiler fixed grate expansion vessel is connected to the other end of the continuous grate expansion vessel body, a continuous grate expansion vessel drain valve is provided between the continuous grate expansion vessel body and the boiler fixed grate expansion vessel, and the other end of the boiler fixed grate expansion vessel is connected to the boiler fixed grate cooling tank, a fixed grate expansion vessel drain valve is provided between the boiler fixed grate expansion vessel and the boiler fixed grate cooling tank, and a continuous grate expansion vessel drain valve is provided between the continuous grate expansion vessel body and the boiler fixed grate expansion vessel, located before the continuous grate expansion vessel drain valve to the boiler fixed grate cooling tank. The heating user manual valve is connected to a hot air curtain body and a steam heating body at the other end of the drain expansion container. The other ends of the hot air curtain body and the steam heating body are connected to the boiler's fixed exhaust cooling pool. A hot air curtain inlet manual valve and a hot air curtain outlet manual valve are connected between the drain expansion container and the hot air curtain body and the boiler's fixed exhaust cooling pool. A steam heating steam supply manual main valve is connected between the drain expansion container and the steam heating body. A steam heating steam inlet branch valve one and a steam heating steam inlet branch valve two are connected between the steam heating steam supply manual main valve and the steam heating body. The other end of the steam heating body is connected to a low-temperature drain valve one and a low-temperature drain valve two that are connected to the boiler's fixed exhaust cooling pool.

[0006] As an improvement, a hot air curtain bypass manual door is provided between the hot air curtain inlet manual door and the hot air curtain outlet manual door. When the hot air curtain body fails, surface heat exchange can be performed by opening the hot air curtain bypass manual door and closing the hot air curtain inlet manual door and the hot air curtain outlet manual door.

[0007] As an improvement, a deaerator is connected to one side of the main body of the continuous blowdown expansion tank. After continuous blowdown of the boiler drum, the steam is first flashed through the main body of the continuous blowdown expansion tank, and a small amount of steam is recovered to the deaerator.

[0008] As an improvement, the main body of the continuous expansion container is provided with two branches. One side of the continuous expansion container is connected to the boiler's periodic expansion container via a drain valve to the periodic expansion container manual door. The other side of the main body of the continuous expansion container is connected to the hot air curtain body and the steam heating body via a drain valve to the heating user manual door. This enables multiple channels to simultaneously drain heat at high temperatures, improving the ambient temperature of the boiler room.

[0009] The advantages of this invention compared with the prior art are as follows: by changing the drainage recovery path of the continuous expansion tank, the high-temperature drainage heat of the continuous expansion tank can be utilized to improve the ambient temperature of the boiler room, reduce the heat source loss of the boiler, and reduce environmental pollution during winter operation by modifying the hot air curtain and steam heating device steam inlet pipe. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a power plant steam drum boiler continuous grate water temperature utilization device according to the present invention.

[0011] As shown in the figure: 1. Manual valve for draining water from the continuous blower expansion container to the heating user; 2. Manual valve for draining water from the continuous blower expansion container to the fixed blower expansion container; 3. Manual valve for draining water from the fixed blower expansion container; 4. Manual valve for the hot air curtain bypass; 5. Manual valve for the hot air curtain inlet; 6. Manual valve for the hot air curtain outlet; 7. Manual main valve for steam heating supply; 8. Steam heating inlet branch valve one; 9. Steam heating inlet branch valve two; 10. Low-temperature drain via valve one; 11. Low-temperature drain via valve two; 12. Boiler steam drum; 13. Main body of the continuous blower expansion container; 14. Boiler fixed blower expansion container; 15. Boiler fixed blower cooling pool; 16. Main body of the hot air curtain; 17. Main body of the steam heating system. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings.

[0013] Combined with appendix Figure 1 As shown, a power plant boiler continuous grate boiler water temperature utilization device includes a boiler drum 12 and a boiler fixed grate cooling tank 15. One end of the boiler drum 12 is connected to a continuous grate expansion tank body 13.

[0014] The main body 13 of the continuous drainage expansion tank is arranged at a height of 18 meters. The drainage of the main body 13 of the continuous drainage expansion tank provides high-temperature drainage to the heating users through a gravity difference of about 0.2MPa. The drainage of the heating users is discharged to the pressureless drainage system of the fixed drainage cooling pool, which can ensure the safety of the entire system.

[0015] A deaerator is connected to one side of the continuous blowdown expansion tank body 13, and a boiler fixed blowdown expansion tank 14 is connected to the other end of the continuous blowdown expansion tank body 13. A manual drain valve 2 is provided between the continuous blowdown expansion tank body 13 and the boiler fixed blowdown expansion tank 14 to drain water from the continuous blowdown expansion tank body to the fixed blowdown expansion tank. The other end of the boiler fixed blowdown expansion tank 14 is connected to the boiler fixed blowdown cooling pool 15. A manual drain valve 3 is provided between the boiler fixed blowdown expansion tank 14 and the boiler fixed blowdown cooling pool 15 to drain water from the boiler fixed blowdown expansion tank body. A manual valve 1 for draining water from the main body 13 of the exhaust expansion container and the boiler fixed exhaust expansion container 14 is provided between them. This valve is located before the manual valve 2 for draining water from the exhaust expansion container to the fixed exhaust expansion container. The other end of the manual valve 1 is connected to a hot air curtain body 16 and a steam heater body 17, respectively. The other ends of both the hot air curtain body 16 and the steam heater body 17 are connected to the boiler fixed exhaust cooling pool 15. The manual valve 1 for draining water from the exhaust expansion container to the heating user and the hot air curtain body 16 are connected to each other. A hot air curtain inlet manual door 5 and a hot air curtain outlet manual door 6, connected to the boiler's fixed-flow cooling pool 15, are provided. A hot air curtain bypass manual door 4 is provided between the hot air curtain inlet manual door 5 and the hot air curtain outlet manual door 6. A steam heating main manual door 7 is provided between the drain expansion container's drain to heating users manual door 1 and the steam heating body 17. A steam heating main manual door 7 is provided between the steam heating main manual door 7 and the steam heating body 17. A steam heating inlet branch door 1 8 and a steam heating inlet branch door 2 9 are provided. The other end of the main body 17 is connected to a low-temperature drain valve 10 and a low-temperature drain valve 2 connected to the boiler fixed exhaust cooling pool 15. The main body 13 of the continuous exhaust expansion container is provided with two branches. One side of the main body 13 of the continuous exhaust expansion container is connected to the boiler fixed exhaust expansion container 14 through the continuous exhaust expansion container drain to the fixed exhaust expansion container manual door 2. The other side of the main body 13 of the continuous exhaust expansion container is connected to the hot air curtain main body 16 and the steam heating main body 17 through the continuous exhaust expansion container drain to the heating user manual door 1.

[0016] With the above structure, the continuous blowdown of the boiler drum 12 first undergoes simple flash evaporation through the main body 13 of the continuous blowdown expansion container, and a small amount of steam is recovered to the deaerator. The remaining part is directly drained through the main body 13 of the continuous blowdown expansion container to the manual valve 2 of the fixed blowdown expansion container and enters the boiler fixed blowdown expansion container 14. Finally, it is discharged into the boiler fixed blowdown cooling pool 15 through the manual valve 3 of the fixed blowdown expansion container. The remaining high-temperature condensate from the continuous blowdown enters the main body 16 of the hot air curtain and the main body 17 of the steam heating system, respectively. Part of it is drained through the main body 13 of the continuous blowdown expansion container to the manual valve 1 of the heating user and undergoes heat exchange through the manual valve 5 of the hot air curtain inlet and the manual valve 6 of the hot air curtain outlet. When the hot air curtain main body 16 fails, surface heat exchange can be achieved by opening the manual valve 4 of the hot air curtain bypass and closing the manual valve 5 of the hot air curtain inlet and the manual valve 6 of the hot air curtain outlet. The low-temperature condensate after heat exchange is recovered to the boiler fixed blowdown cooling pool 15.

[0017] Finally, the remaining high-temperature drain water is drained through the main body 13 of the drain expansion container to the manual door 1 of the heating user, and then through the manual main valve 7 of the steam heating supply, and the steam heating inlet branch valve 1 8 and the steam heating inlet branch valve 2 9 to the two sets of steam heating pipes for surface heat exchange. The low-temperature drain water after heat exchange is discharged through valve 1 10 and through valve 2 to the boiler fixed discharge cooling pool 15. When there is a leak in any set of steam heating pipes, it can be isolated through the branch inlet and outlet.

[0018] In a specific implementation of this utility model, the continuous blowdown of the boiler drum 12 first passes through the main body 13 of the continuous blowdown expansion container for simple flash evaporation, and a small amount of steam is recovered to the deaerator. The remaining part is directly drained through the continuous blowdown expansion container to the manual gate 2 of the fixed blowdown expansion container and enters the boiler fixed blowdown expansion container 14. Finally, it is discharged into the boiler fixed blowdown cooling pool 15 through the manual drain gate 3 of the fixed blowdown expansion container.

[0019] Before the main body 13 of the continuous expansion container drains water to the manual valve 2 of the fixed expansion container, a continuous expansion container drains water to the manual valve 1 of the heating user and supplies heat to the hot air curtain and steam heating system through a DN50mm pipeline for heat exchange.

[0020] For hot air curtain users: the high-temperature condensate drains through the continuous drain expansion container to the heating user manual door 1, where it exchanges heat through the hot air curtain inlet manual door 5 and the hot air curtain outlet manual door 6. In case of hot air curtain failure, surface heat exchange can be achieved by opening the hot air curtain bypass manual door 4 and closing the hot air curtain inlet manual door 5 and the hot air curtain outlet manual door 6. The low-temperature condensate after heat exchange is recycled to the fixed-drain cooling pool.

[0021] For steam heating users: High-temperature drain water is drained through the drain expansion container to the manual valve 1 of the heating user, and then through the manual main valve 7 of the steam heating supply, and the steam heating inlet branch valve 1 8 and the steam heating inlet branch valve 2 9 to the two sets of steam heating pipes for surface heat exchange. The low-temperature drain water after heat exchange is discharged through valve 1 10 and through valve 2 11 to the boiler fixed discharge cooling pool 15. When there is a leak in any set of steam heating pipes, it can be isolated through the branch inlet and outlet.

[0022] The main body of the continuous discharge expansion tank has a high-temperature condensate temperature of 180℃. After heat exchange through steam heating and hot air curtain, the condensate temperature drops to 50℃. The average annual discharge of continuous discharge condensate is 2t / h. Based on a 5-month winter heating period, it can save approximately 124.16 tons of standard coal.

[0023] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for utilizing the temperature of boiler water in a power plant steam drum boiler, comprising a boiler drum (12) and a boiler degassing cooling pool (15), wherein a main body (13) of a degassing expansion vessel is connected to one end of the boiler drum (12), and a boiler degassing expansion vessel (14) is connected to the other end of the main body (13), a manual valve (2) for draining water from the degassing expansion vessel to the degassing expansion vessel is provided between the main body (13) and the boiler degassing expansion vessel (14), and the other end of the boiler degassing expansion vessel (14) is connected to the boiler degassing cooling pool (15), and a manual valve (3) for draining water from the boiler degassing expansion vessel (14) is provided between the boiler degassing expansion vessel (14) and the boiler degassing cooling pool (15), characterized in that: Between the main body (13) of the continuous expansion container and the boiler fixed expansion container (14), there is a manual valve (1) for draining water from the continuous expansion container to the heating user, located before the manual valve (2) for draining water from the continuous expansion container to the fixed expansion container. The other end of the manual valve (1) for draining water from the continuous expansion container to the heating user is connected to a hot air curtain body (16) and a steam heater body (17). The other ends of the hot air curtain body (16) and the steam heater body (17) are both connected to the boiler fixed exhaust cooling pool (15). A connection is provided between the manual valve (1) for draining water from the continuous expansion container to the heating user and the hot air curtain body (16). The hot air curtain inlet manual door (5) and hot air curtain outlet manual door (6) are connected to the boiler fixed exhaust cooling pool (15). The manual door (1) for draining water to heating users of the continuous exhaust expansion container is connected to the steam heating body (17) and a steam heating supply manual main door (7) is provided. The steam heating supply manual main door (7) and the steam heating body (17) are connected to a steam heating inlet branch door one (8) and a steam heating inlet branch door two (9). The other end of the steam heating body (17) is connected to a low temperature drain valve one (10) and a low temperature drain valve two (11) connected to the boiler fixed exhaust cooling pool (15).

2. The device for utilizing the temperature of continuous grate boiler water in a power plant steam drum boiler according to claim 1, characterized in that: A hot air curtain bypass manual door (4) is provided between the hot air curtain inlet manual door (5) and the hot air curtain outlet manual door (6).

3. The device for utilizing the temperature of continuous grate boiler water in a power plant steam drum boiler according to claim 1, characterized in that: A deaerator is connected to one side of the main body (13) of the continuous expansion container.

4. The device for utilizing the temperature of continuous grate boiler water in a power plant steam drum boiler according to claim 1, characterized in that: The main body (13) of the continuous expansion container is provided with two branches. One side of the main body (13) of the continuous expansion container is connected to the boiler continuous expansion container (14) through the continuous expansion container drain to the periodic expansion container manual door. The other side of the main body (13) of the continuous expansion container is connected to the hot air curtain body (16) and the steam heating body (17) through the continuous expansion container drain to the heating user manual door (1).

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