CN215112042U

CN215112042U - Ash conveying and gas storage tank capable of discharging pollution regularly

Info

Publication number: CN215112042U
Application number: CN202120973086.1U
Authority: CN
Inventors: 程延光; 唐伟; 徐亦然; 陈锡松
Original assignee: Huaneng Nanjing Jinling Power Generation Co Ltd
Current assignee: Huaneng Nanjing Jinling Power Generation Co Ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2021-12-10
Anticipated expiration: 2031-05-08

Abstract

The invention provides an ash conveying gas storage tank capable of discharging pollution regularly, which comprises an ash conveying gas storage tank, a drain pipe and a drain pipe; the outlet of the ash conveying and air storage tank is communicated with a drain pipe through a drain pipe; the drain pipe is provided with a drain electromagnetic valve; the drain solenoid valve is set with pulse through DCS system for periodic control. The invention effectively solves the problems of ash conveying efficiency reduction, environmental protection and excessive discharge, equipment damage accidents and the like caused by long-time unmanned drainage of the air storage tank due to manual negligence in the operation of the ash conveying system; the effect of controlling the water drainage period is achieved by additionally arranging the solenoid valve of the drain pipe and setting pulses through the DCS, so that the release of manpower can be realized, and the water drainage efficiency is greatly improved; the three-way valve is matched, so that water can be discharged manually, and the water can be discharged automatically by the water discharging electromagnetic valve. The problems that residual water of the gas storage tank is discharged out of time due to special conditions, water vapor siltation is not smooth, and the ash conveying quality is affected are avoided.

Description

Ash conveying and gas storage tank capable of discharging pollution regularly

Technical Field

The invention belongs to the field of program-controlled protection of thermal power plants, and particularly relates to an ash conveying and storing tank capable of discharging pollution regularly.

Background

In the existing ultra-supercritical unit, each furnace is provided with an independent fly ash collecting and conveying system. The ash conveying process equipment comprises an air compressor, a bin pump group, DCS control, ash warehouse separation and dry ash shipment. The conveying air source, the ash warehouse sorting and the dry ash shipment are common equipment of the two furnaces. Each furnace is provided with 2 three-chamber four-electric-field electric dust collectors, 24 electric fields which are relatively independent are arranged, and each electric field is provided with 2 ash hoppers. Each furnace is provided with 8 ash hoppers for denitration and coal economizer, and the total number of the ash hoppers in a single furnace is 64. Each ash bucket is correspondingly provided with 1 conveying bin pump. The 64 bin pumps are grouped according to the connected ash pipes and automatically conveyed according to preset parameter circulation intervals. Each furnace is provided with four ash conveying main pipes, two sides of an electric field A, B are respectively provided with a coarse ash pipe for conveying fly ash of an electric field, denitration and coal economizer ash bucket; the two electric fields are provided with an ash conveying pipe, and the three and four electric fields share a fine ash pipe.

The conveying of the fly ash is completed by the ash conveying bin pump unit once, and each working cycle comprises five stages of feeding, pressurized fluidization, conveying, purging and waiting.

The air reservoir serves, among other things, to store compressed air in the compressed air system and to dampen system pressure fluctuations, and to provide a very short buffer supply of air, in particular of the instrument air, in the event of a compressor failure. Compared with the pipeline, the gas flow velocity in the gas storage tank is very low, the gas has enough residence time, and the cooled gas temperature is still higher than the ambient temperature due to the heat exchange with the environment and the limitation of the capacity of the cooling device. During the storage period of the gas storage tank (the air compressor of the power plant runs discontinuously), heat is emitted outwards, the temperature is gradually reduced, and moisture and oil stains carried in the gas are gradually condensed. The moisture in the compressed air causes corrosion or ice plugs of gas equipment, pipelines and valves, so that the leakage and the resistance loss are increased, the service life of the equipment is shortened, the maintenance cost is increased, the product qualification rate is reduced, even accidents are caused, and the loss of the product greatly exceeds the cost of a drying system.

At present, the mode that the oil water in the gas holder generally all adopted the artifical stop valve of opening regularly to discharge, if because of the operating personnel lost work, the interior profit of jar will be carried by gas again and get into pneumatic equipment. Compressed air is used as the motive power of pneumatic regulating equipment in a power plant, and has certain requirements on the quality (drying and purification) of the pneumatic regulating equipment. Therefore, the water and oil stains in the air storage tank should be removed in time. Otherwise, the quality of the adjustment is seriously affected, and even equipment misoperation accidents occur.

Therefore, it is an urgent need to solve the above problems by those skilled in the art to develop a gas storage tank capable of discharging water and oil stains in time.

Disclosure of Invention

In order to solve the problems, the invention discloses an ash conveying and storing tank capable of discharging pollution regularly.

In order to achieve the purpose, the invention provides the following technical scheme:

an ash conveying and storing tank for periodic pollution discharge comprises an ash conveying and storing tank, a drain pipe and a drain pipe; the outlet of the ash conveying and air storage tank is communicated with a drain pipe through a drain pipe; the drain pipe is provided with a drain electromagnetic valve; the drain solenoid valve is set with pulse through DCS system for periodic control.

Furthermore, the device also comprises a check pipe; two ends of the check pipe are respectively communicated to the front end and the rear end of the drain electromagnetic valve on the drain pipe.

Furthermore, a check valve is arranged on the check pipe in a matching way.

Furthermore, a tee joint is arranged on the drain pipe in a matching way; two ends of the check pipe are respectively communicated to the outlet of the tee joint and the rear end of the drain electromagnetic valve on the drain pipe.

Compared with the prior art, the invention has the following beneficial effects:

1. the problems of ash conveying efficiency reduction, environmental protection super drainage, equipment damage accidents and the like caused by long-time unmanned drainage of the air storage tank due to manual negligence in the operation of the ash conveying system are effectively solved;

2. the effect of controlling the water drainage period is achieved by additionally arranging the solenoid valve of the drain pipe and setting pulses through the DCS, so that the release of manpower can be realized, and the water drainage efficiency is greatly improved;

3. the three-way valve is matched, so that water can be discharged manually, and the water can be discharged automatically by the water discharging electromagnetic valve. The problems that residual water of the gas storage tank is discharged out of time due to special conditions, water vapor siltation is not smooth, and the ash conveying quality is affected are avoided.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

List of reference numerals: ash conveying and gas storage tank 1, drain pipe 2, drain pipe 3, drain solenoid valve 4, check pipe 5, check valve 6, tee bend 7.

Detailed Description

The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the present invention is a schematic structural diagram of an ash conveying gas storage tank for periodic pollution discharge, and the ash conveying gas storage tank includes an ash conveying gas storage tank 1, a water discharge pipe 2 and a water discharge pipe 3.

The outlet of the ash conveying and gas storage tank 1 is communicated with a water drainage pipe 2 through a water drainage pipe 3; the drain pipe 3 is sequentially provided with a tee joint 7 and a drain electromagnetic valve 4; the drain solenoid valve 4 is set with pulses by the DCS system for periodic control.

Also comprises a check pipe 5; two ends of the check pipe 5 are respectively communicated to the outlet of the tee joint 7 and the rear end of the drain electromagnetic valve 4 on the drain pipe 3, and the check pipe 5 is provided with a check valve 6 in a matching way.

The invention utilizes the ash conveying DCS system to modify the pulse signal of the water drainage electromagnetic valve 4, achieves the aim of controlling the water drainage period, can greatly reduce the frequency of operators and realizes unattended operation.

Meanwhile, the tee joint 7 is used as a drainage standby system and connected with an original stop valve, and a set of manual and automatic integrated gas storage tank drainage system is established and belongs to the field of thermal power plant program control protection. The automatic function is put into use, so that the labor intensity of personnel for draining water regularly is reduced, the energy waste is reduced, meanwhile, the noise of an air compressor workshop is effectively reduced, zero-leakage drainage of gas is realized, and the effect is obvious. The pipe blockage of the system is greatly reduced, and the environmental pollution during pipe cleaning is reduced.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.

Claims

1. The utility model provides an ash conveying gas holder of periodic blowdown which characterized in that: comprises an ash conveying and gas storage tank (1), a drain pipe (2) and a drain pipe (3); the outlet of the ash conveying and gas storage tank (1) is communicated with a water drainage pipe (2) through a water drainage pipe (3); the drain pipe (3) is provided with a drain electromagnetic valve (4); the drainage electromagnetic valve (4) is set with pulses through a DCS system for periodic control.

2. The periodically blowdown ash conveying and storing tank as set forth in claim 1, wherein: also comprises a check pipe (5); two ends of the check pipe (5) are respectively communicated to the front end and the rear end of a drain electromagnetic valve (4) on the drain pipe (3).

3. The periodically blowdown ash conveying and storing tank as set forth in claim 2, wherein: and a check valve (6) is arranged on the check pipe (5) in a matching way.

4. The periodically blowdown ash conveying and storing tank as set forth in claim 2, wherein: a tee joint (7) is arranged on the drain pipe (3) in a matching way; two ends of the check pipe (5) are respectively communicated to an outlet of the tee joint (7) and the rear end of a drain electromagnetic valve (4) on the drain pipe (3).