CN211232423U

CN211232423U - Erosion-preventing pressure-reducing protection device for temperature-reducing water system valve of power station boiler

Info

Publication number: CN211232423U
Application number: CN201922386194.4U
Authority: CN
Inventors: 高宏光; 程瑞声; 刘智勇; 张伟; 高波
Original assignee: Shandong Hongqiao New Material Co Ltd
Current assignee: Shandong Hongqiao New Material Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-11
Anticipated expiration: 2029-12-27

Abstract

The utility model provides a power plant boiler desuperheating water system valve erosion-proof pressure reduction protection device solves because the high valve erosive wear serious problem that leads to of desuperheating water pressure. The utility model provides a power plant boiler temperature reduction water system valve erosion-proof pressure reduction protection device, the pressure reduction protector has set gradually on the temperature reduction water main pipe of power plant boiler temperature reduction water system, teletransmission pressure transmitter and the electronic main door of temperature reduction water, the temperature reduction water main pipe is divided into one-level temperature reduction unit and second grade temperature reduction unit through two temperature reduction water branch pipes, one-level temperature reduction unit and second grade temperature reduction unit all include two temperature reduction unit branch pipes, all set up first temperature reduction water control valve on every temperature reduction unit branch pipe, the pneumatic regulating gate of temperature reduction water, second temperature reduction water control valve and desuperheater.

Description

Erosion-preventing pressure-reducing protection device for temperature-reducing water system valve of power station boiler

Technical Field

The utility model relates to a pressure reduction protection device, concretely relates to erosion-proof pressure reduction protection device of power station boiler desuperheating water system valve.

Background

Various valves of the temperature reduction water system of the power station boiler are more, the phenomena of serious erosion and abrasion of valve cores and valve seats generally exist, the frequent replacement of the valves does not increase the maintenance cost of manual maintenance, more importantly, the serious internal leakage of the valves can obviously increase the water erosion danger of turbine blades when the steam temperature is greatly reduced, and the safe and economic operation of a unit is greatly threatened.

Along with the increasingly severe environmental protection situation of China, all large and medium boilers are subjected to low-nitrogen emission reconstruction, the temperature reduction water valve is seriously scoured and worn due to the change of a combustion mode after reconstruction, particularly, the problems of steam temperature reduction, scaling water erosion of a turbine blade, coal consumption increase of a power plant and the like caused by the increasingly serious scouring and inner leakage of the temperature reduction water valve of a reheater are prominent, and the development of national coal reduction work is not facilitated. The existing conventional temperature-reducing water system can not meet the requirement of safe and economic operation of a unit because of easily causing valve erosion internal leakage, and meanwhile, if an imported high-grade anti-erosion valve is adopted, the factor quantity is large, the cost is high, and the enterprise production cost is not favorably reduced.

When pressure medium of an original temperature-reducing water system passes through the valve, a strong scouring and abrasion effect is generated on the valve core and the valve seat under the action of high pressure difference, so that the valve can be obviously leaked in a short time, and the phenomenon of vibration and noise generation of the valve body is shown on site.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a power plant boiler desuperheating water system valve erosion-proof pressure reduction protection device solves because the high valve erosive wear serious problem that leads to of desuperheating water pressure.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

the utility model provides a power plant boiler temperature reduction water system valve erosion-proof pressure reduction protection device, the pressure reduction protector has set gradually on the temperature reduction water main pipe of power plant boiler temperature reduction water system, teletransmission pressure transmitter and the electronic main door of temperature reduction water, the temperature reduction water main pipe is divided into one-level temperature reduction unit and second grade temperature reduction unit through two temperature reduction water branch pipes, one-level temperature reduction unit and second grade temperature reduction unit all include two temperature reduction unit branch pipes, all set up first temperature reduction water control valve on every temperature reduction unit branch pipe, the pneumatic regulating gate of temperature reduction water, second temperature reduction water control valve and desuperheater.

The preferable scheme of the erosion-preventing pressure-reducing protection device for the temperature-reducing water system valve of the power station boiler is that the pressure-reducing protector comprises a pressure-reducing valve and a film spring type pneumatic actuating mechanism matched with the pressure-reducing valve.

The preferable scheme of the erosion-preventing pressure-reducing protection device for the temperature-reducing water system valve of the power station boiler is that the first temperature-reducing water control valve and the second temperature-reducing water control valve are both electric stop valves.

The utility model has the advantages that: the pressure reduction protector can greatly reduce the front-back pressure difference of the valve, remarkably weaken the erosion effect on the valve core and the valve seat and achieve the aim of protecting the valve. The remote operation can be conveniently carried out according to the water supply pressure and the desuperheating water flow after the pressure reducing device, and a new desuperheating water flow device does not need to be added, so that the use is facilitated.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a schematic front view of embodiment 1 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a power plant boiler temperature reduction water system valve erosion-proof pressure reduction protection device, pressure reduction protector 1 has set gradually on power plant boiler temperature reduction water system's the female pipe 8 of temperature reduction water, teletransmission pressure transmitter 2 and the electronic main door 3 of temperature reduction water, the female pipe 8 of temperature reduction water is divided into one-level temperature reduction unit and second grade temperature reduction unit through two temperature reduction water branch pipes, one-level temperature reduction unit and second grade temperature reduction unit all include two temperature reduction unit branch pipes, all set up first temperature reduction water control valve 4 on every temperature reduction unit branch pipe, temperature reduction water pneumatic control door 5, second temperature reduction water control valve 9 and one-level temperature reduction ware (6) or second grade temperature reduction ware (7).

In this embodiment, the pressure reducing protector 1 includes a pressure reducing valve and a film spring type pneumatic actuator matched with the pressure reducing valve or can be adjusted on site by using a hand wheel of the pressure reducing valve, and when the pressure reducing valve is purchased, attention needs to be paid to the pressure and the temperature of the reduced-temperature water, the inner diameter of a reduced-temperature water mother pipe and the maximum reduced-temperature water flow rate under the conventional working condition of the unit, and the pressure reducing valve is matched with.

In the present embodiment, the first and second reduced-temperature water control valves 4 and 9 are both electric cut-off valves.

After the pressure reduction protector 1 is used for reducing the pressure of high-pressure feed water, the front and back pressure differences of the first temperature-reducing water control valve 4, the temperature-reducing water pneumatic adjusting valve 5 and the second temperature-reducing water control valve 9 are greatly reduced, so that the purpose of prolonging the service life of the valves is achieved, and the effect is obvious as proved by field production practices.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a power plant boiler temperature reduction water system valve scour protection loses pressure reduction protection device which characterized in that: the temperature reduction water system of the power station boiler comprises a temperature reduction water main pipe (8), a pressure reduction protector (1), a remote transmission pressure transmitter (2) and a temperature reduction water electric main door (3) are sequentially arranged on the temperature reduction water main pipe (8), the temperature reduction water main pipe (8) is divided into a first-stage temperature reduction unit and a second-stage temperature reduction unit through two temperature reduction water branch pipes, the first-stage temperature reduction unit and the second-stage temperature reduction unit respectively comprise two temperature reduction unit branch pipes, and each temperature reduction unit branch pipe is provided with a first temperature reduction water control valve (4), a temperature reduction water pneumatic adjusting door (5), a second temperature reduction water control valve (9) and a first-stage temperature reducer (6) or a second-stage temperature reducer (7).

2. The utility boiler temperature-reducing water system valve erosion-prevention pressure-reduction protection device of claim 1, characterized in that: the pressure reduction protector (1) comprises a pressure reduction valve and a film spring type pneumatic actuating mechanism matched with the pressure reduction valve.

3. The utility boiler desuperheating water system valve erosion-proof pressure reduction protection device of claim 1 or 2, characterized in that: the first temperature-reducing water control valve (4) and the second temperature-reducing water control valve (9) are both electric stop valves.