CN215336264U - Hydrophobic power recovery device for boiler air heater - Google Patents

Abstract

The utility model belongs to the technical field of a hydrophobic recovery processing device of a thermodynamic system, and particularly relates to a hydrophobic power recovery device for a boiler air heater, which comprises: the device comprises a drain tank (1), a radiator (2), a controller (3), a drain electronic valve (4), a main pipe drain valve (5), a steam valve (6) and a drain valve (7); a steam valve (6) is arranged on a steam pipeline (9) communicated with the inlet end of the steam trap (1), and a steam trap (7) is arranged on a steam trap (10) which is arranged in parallel with the steam pipeline communicated with the inlet end of the steam trap (1); the output end of the drain tank (1) is communicated with the radiator (2) through a water pipeline (12), an electronic drain valve (11) is arranged on the water pipeline (12), and the electronic drain valve (11) is electrically connected with the controller (3); the output end of the radiator (2) is sequentially provided with a drainage electronic valve (4) and a main pipe drainage valve (5).

Description

Hydrophobic power recovery device for boiler air heater

Technical Field

The utility model belongs to the technical field of drainage recovery processing equipment of a thermodynamic system, and particularly relates to a drainage power recovery device for a boiler air heater.

Background

A thermodynamic system of a power plant can generate hydrophobic water during operation, the hydrophobic water can be subjected to 'flash evaporation' in the process of being discharged into a low-pressure system to cause vibration of a thermodynamic system pipeline, the hydrophobic water in a saturated state is conveyed by a water pump, and the water pump is easy to generate 'cavitation', so that the operation safety of equipment is influenced.

When the drainage of the thermodynamic system is in a saturated state and is discharged into a drainage pipeline through a drainage device, the pressure of the drainage pipeline is lower than the saturated pressure of the drainage, so that the drainage has a flash evaporation phenomenon, steam and water in the drainage pipeline coexist, the vibration (water hammer phenomenon) of the drainage pipeline is caused, and the pipeline is easy to damage; the drain pipe needs to be lifted through equipment (or a building), the water resistance is easily generated at the lifting position of the drain pipe, and when the steam supply pressure is lower than the removal pressure (the drain generates the static pressure of a water column), the drain cannot be removed. When the steam supply pressure is higher than the removal pressure (static pressure of water column generated by drainage), the pipeline vibration occurs at the lifting position of the drainage pipeline, and the pipeline is easy to damage.

In conclusion, the conventional drainage power recovery device can only realize drainage recovery under specific pressure, cannot meet drainage recovery of any type, and particularly cannot solve the problem of 'flash evaporation' of saturated drainage, the pressure at the inlet of a drainage pump is reduced, the pressure at the inlet of the drainage pump cannot meet the required cavitation allowance of a water pump, cavitation frequently occurs during operation of the drainage pump, the damage to the drainage pump is caused, the saturated drainage cannot be recovered, and the pipeline vibration and the whole device vibration in the recovery device cannot be eliminated, so that the waste of working media and heat is caused; meanwhile, the existing drainage recovery device has large volume and high cost, and cannot realize large-batch arrangement; in addition, the existing drainage device generally adopts a mode of manual drainage or direct drainage of a steam trap, but the two modes greatly increase the labor capacity of workers and simultaneously cause the loss of working media and heat.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned defects existing in the prior art, the utility model provides a hydrophobic power recovery device for a boiler air heater, comprising: the device comprises a drain tank, a radiator, a controller, a drain electronic valve, a main pipe drain valve, a steam valve and a drain valve;

a steam pipeline communicated with the inlet end of the drain tank is provided with a steam valve, and a drain pipeline communicated with the inlet end of the drain tank is provided with a drain valve in parallel;

the controller is electrically connected with the drain tank; the output end of the drain tank is communicated with the radiator through a water pipeline, and an electronic drain valve is arranged on the water pipeline and is electrically connected with the controller;

the output end of the radiator is sequentially provided with a drainage electronic valve and a main pipe drainage valve;

the water discharge electronic valve is electrically connected with the controller.

As one improvement of the technical scheme, the bottom of the drain tank is communicated with a sewage pipeline, and a sewage valve is arranged on the sewage pipeline.

As one improvement of the technical scheme, the steam in the steam pipeline is low-temperature and low-pressure steam.

As one improvement of the technical scheme, the controller is in an integrated design and has the functions of measurement, operation and control.

As one improvement of the technical scheme, the drain tank stores low-temperature steam from the steam pipeline and drain water from the boiler air heater in the drain pipeline, the low-temperature steam is used as conveying drain power, and the drain water of the boiler air heater in the thermodynamic system is conveyed into the radiator to be cooled.

Compared with the prior art, the utility model has the beneficial effects that:

the recovery device of the utility model changes saturated drainage into super-cooled drainage after pressurization treatment, cancels the prior drainage pump, adopts steam drive, eliminates the vibration problem of a drainage pipeline in the drainage recovery process, realizes the complete recovery of all saturated drainage, greatly reduces the cost, has simple structure and small volume, is suitable for installation in any installation environment, and greatly improves the treatment efficiency. The whole device has no water pump or other rotating equipment, the running reliability of the equipment is greatly improved, and the maintenance cost is reduced; the device adopts a totally-enclosed arrangement, thereby avoiding the leakage loss of working medium; the device of the utility model improves the recovery of the heat dissipating capacity of the drainage and improves the utilization amount of low-quality steam. In addition, the drainage pipeline is in a supercooled state in the whole drainage conveying process, so that the drainage pipeline cannot vibrate; the hydrophobic recovery device is not provided with a water pump or other rotating parts, the device is not easy to break down, and the maintenance is convenient.

Drawings

FIG. 1 is a schematic structural diagram of a hydrophobic power recovery device for a boiler air heater according to the present invention;

reference numerals:

1. draining tank 2 and radiator

3. Controller 4, drainage electronic valve

5. Main pipe drain valve 6, steam valve

7. Drain valve 8 and blow-down valve

9. Steam pipeline 10 and drain pipeline

11. Electronic steam trap 12 and water pipeline

Detailed Description

The utility model will now be further described with reference to the accompanying drawings.

As shown in fig. 1, the present invention provides a hydrophobic power recovery apparatus for a boiler heater, the apparatus including: the device comprises a drain tank 1, a radiator 2, a controller 3, a drain electronic valve 4, a main pipe drain valve 5, a steam valve 6 and a drain valve 7;

a steam valve 6 is arranged on a steam pipeline 9 communicated with the inlet end of the steam trap 1, and a steam trap 7 is arranged on a steam trap 10 arranged in parallel with the steam pipeline 9 communicated with the inlet end of the steam trap 1;

the controller 3 is electrically connected with the drain tank 1; the output end of the drain tank 1 is communicated with the radiator 2 through a water pipeline 11, an electronic drain valve 11 is arranged on the water pipeline 12, and the electronic drain valve 11 is electrically connected with the controller 3;

the output end of the radiator 2 is sequentially provided with a drainage electronic valve 4 and a main pipe drainage valve 5;

the electronic drain valve 4 is electrically connected with the controller 3.

Wherein, the steam in the steam pipeline 9 is low-temperature steam.

Wherein, the bottom of the drain tank 1 is communicated with a sewage pipeline 13, and a sewage valve 8 is arranged on the sewage pipeline 13. The low-temperature steam in the steam trap 1 is used as water delivery power, and the residual drained water is sent to a recovery device connected with the outside through a drain pipe 13, the recovery device has a draining and pressurizing function, and the residual drained water is pressurized and then sent to the steam trap 1.

The steam trap 1 stores low-temperature steam from the steam pipeline 9 and drain water from the boiler air heater in the drain pipeline 10, the low-temperature steam is used as water delivery power, and the drain water in the boiler air heater is sent into the radiator 2 to be cooled.

In this embodiment, the drain electronic valve 4, the main drain valve 5, the steam valve 6, the trap 7, and the blowdown valve 8 are all conventional devices known in the art.

The hydrophobic power recovery device carries out full-sealing arrangement on each joint, and 100% hydrophobic recovery is realized.

The controller 3 is a PLC controller.

The drainage power recovery device is arranged according to the actual situation of a production field, after drainage generated by a steam heater or a fan heater enters a drainage tank 1 through a drainage pipeline 10, a controller 3 monitors the drainage water level in the drainage tank 1 in real time, when the drainage water level in the drainage tank 1 reaches a preset water level threshold value, the controller 3 controls an electronic drainage valve 11 to be opened, pressurized drainage passing through the drainage tank 1 is sent into a radiator 2 through a water pipeline 12 to be cooled, and drainage in a super-cooled state is formed; the controller 3 controls the drainage electronic valve 4 to be opened, and simultaneously opens the drainage valve 5 of the main pipe to drain the drainage into the main pipe; the controller 3 monitors the residual water level in the steam trap 1 in real time, when the residual water level in the steam trap 1 reaches a preset residual threshold value and the temperature of the cooled steam in the radiator 2 reaches a preset temperature threshold value, the controller 3 controls the drainage electronic valve to be opened, and the residual steam in the steam trap 1 is drained in a pressurized mode. The drain water in the radiator 2 is in a supercooled state, so that after entering the water conveying pipeline 12, the situation of flash evaporation cannot occur, and the water conveying pipeline does not vibrate.

The drainage power recovery device adopts an integrated design, so that the drainage power recovery device is convenient to install in a production field; the device is driven by steam (or compressed air), the whole device has no water pump or other rotating equipment, the running reliability of the equipment is greatly improved, and the maintenance cost is reduced; all the joints of the device are arranged in a fully-sealed manner, so that the leakage loss of working media is avoided; the device changes pressurized saturated drainage into supercooled drainage, and eliminates the problem of vibration of a drainage pipeline (equipment) in the recovery process; the heat dissipation of the automatic drainage recovery device can increase the heat dissipation capacity of drainage, improve the environmental temperature of a factory building and improve the utilization amount of low-quality steam. The hydrophobic power recovery device is also suitable for hydrophobic recovery of other thermodynamic systems.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (4)

1. A hydrophobic power recovery device for a boiler air heater, the device comprising: the device comprises a drain tank (1), a radiator (2), a controller (3), a drain electronic valve (4), a main pipe drain valve (5), a steam valve (6) and a drain valve (7);

a steam valve (6) is arranged on a steam pipeline (9) communicated with the inlet end of the steam trap (1), and a steam trap (7) is arranged on a steam trap (10) which is arranged in parallel with the steam pipeline communicated with the inlet end of the steam trap (1);

the controller (3) is electrically connected with the drain tank (1); the output end of the drain tank (1) is communicated with the radiator (2) through a water pipeline (12), an electronic drain valve (11) is arranged on the water pipeline (12), and the electronic drain valve (11) is electrically connected with the controller (3);

the output end of the radiator (2) is sequentially provided with a drainage electronic valve (4) and a main pipe drainage valve (5);

the electronic drainage valve (4) is electrically connected with the controller (3).

2. The hydrophobic power recovery device for a boiler heater according to claim 1, wherein the bottom of the hydrophobic tank (1) is communicated with a drain pipe (13), and a drain valve (8) is arranged on the drain pipe (13).

3. The hydrophobic power recovery device for a boiler heater according to claim 1, characterized in that the steam in the steam duct (9) is low-temperature, low-pressure steam.

4. The hydrophobic power recovery device for the boiler air heater according to claim 1, wherein the hydrophobic tank (1) stores and separates low-temperature steam from the steam pipeline (9) and hydrophobic water from the boiler air heater in the hydrophobic pipeline (10), the low-temperature steam is used as power for conveying the hydrophobic water, and the hydrophobic water in the boiler air heater is conveyed into the radiator (2) to be cooled, so that the temperature of the hydrophobic water is reduced to be lower than the saturation temperature corresponding to the discharge pressure.

Images