CN214745669U

CN214745669U - Exhaust steam recovery device of deaerator in power plant

Info

Publication number: CN214745669U
Application number: CN202022510769.1U
Authority: CN
Inventors: 陆中华; 顾建平; 顾奇; 胡赟燕
Original assignee: Zhejiang Hengyang Thermal Power Co ltd
Current assignee: Zhejiang Hengyang Thermal Power Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-11-16
Anticipated expiration: 2030-11-03

Abstract

The utility model discloses a power plant deaerator exhaust steam recovery device, which comprises a heat exchanger, wherein the heat exchanger comprises a first inlet, a first outlet, a second inlet, a second outlet and a third outlet, the first inlet is communicated with demineralized water, the first outlet is communicated with the deaerator, the second inlet is communicated with deaerator exhaust steam, the second outlet is communicated with the atmosphere, and the third outlet is communicated with a drain tank; be provided with the balanced valve between second entry and the second export, oxygen-eliminating device exhaust steam recycle can improve oxygen-eliminating device steam utilization greatly, improves boiler thermal efficiency, fuel saving and water resource reduce enterprise's manufacturing cost, improve the market competition and the benefit of enterprise to eliminate the hot pollution of white steam above the factory, beautify the factory environment, reach cleaner production, accomplish really that economic benefits and social are two rich.

Description

Exhaust steam recovery device of deaerator in power plant

Technical Field

The utility model particularly relates to a power plant oxygen-eliminating device exhaust steam recovery unit.

Background

At present, the water supply oxygen removal mode adopts a steam heating mode to carry out thermal oxygen removal, oxygen-enriched gas after oxygen removal is discharged from the top of a deaerator, so that considerable steam is discharged along with exhaust gas, and energy waste and environmental pollution are caused. The waste gas contains a large amount of clean steam, and the temperature is over 100 ℃, so that a large amount of heat energy and qualified desalted water are wasted, the 'white dragon' phenomenon occurs in a plant area, and the environment of the plant area is polluted.

Disclosure of Invention

The utility model aims at providing a power plant oxygen-eliminating device exhaust steam recovery unit, it is aiming at the technical problem who exists in solving the background art.

In order to solve the technical problem, the purpose of the utility model is to realize like this:

the waste steam recovery device of the deaerator in the power plant comprises a heat exchanger, wherein the heat exchanger comprises a first inlet, a first outlet, a second inlet, a second outlet and a third outlet, the first inlet is communicated with desalted water, the first outlet is communicated with the deaerator, the second inlet is communicated with waste steam of the deaerator, the second outlet is communicated with the atmosphere, and the third outlet is communicated with a drain tank; and a balance valve is arranged between the second inlet and the second outlet.

On the basis of the above scheme and as a preferable scheme of the scheme: the first inlet is connected with a first valve in series in a communicating pipeline of demineralized water, the first outlet is connected with a second valve in series in a communicating pipeline of the deaerator, and the second inlet is connected with a third valve in series in a communicating pipeline of the deaerator and the steam exhaust.

On the basis of the above scheme and as a preferable scheme of the scheme: and a fourth valve is connected in series in a pipeline for communicating the second outlet with the atmosphere.

On the basis of the above scheme and as a preferable scheme of the scheme: and a fifth valve is connected in series in a pipeline for communicating the third outlet with the drain tank.

On the basis of the above scheme and as a preferable scheme of the scheme: and two ends of the balance valve are respectively communicated with the inlet end of the third valve and the outlet end of the fourth valve.

Compared with the prior art, the utility model outstanding and profitable technological effect is: the waste steam of the deaerator can be connected with the heat exchanger by a pipeline, and the high-temperature waste steam is used for heating demineralized water, so that the water inlet temperature of the deaerator is increased, the heating steam of the deaerator is saved, and meanwhile, condensed water condensed by the heat exchanger is recycled to a drain tank, and non-condensed gas is directly exhausted to the atmosphere, so that the full utilization of energy is realized; the steam utilization rate of the deaerator can be greatly improved by recycling the exhaust steam of the deaerator, the heat efficiency of a boiler is improved, fuel and water resources are saved, the production cost of an enterprise is reduced, the market competitiveness and benefit of the enterprise are improved, white steam thermal pollution above a plant area is eliminated, the environment of the plant area is beautified, clean production is achieved, and economic benefit and social benefit are really achieved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Detailed Description

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step, based on the given embodiments, fall within the scope of protection of the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

The waste steam recovery device of the deaerator in the power plant comprises a heat exchanger 1, wherein the heat exchanger 1 comprises a first inlet 11, a first outlet 12, a second inlet 13, a second outlet 14 and a third outlet 15, the first inlet 11 is communicated with desalted water, the first outlet 12 is communicated with the deaerator, the second inlet 13 is communicated with waste steam of the deaerator, the second outlet 14 is communicated with the atmosphere, and the third outlet 15 is communicated with a drain tank; a balancing valve 6 is arranged between the second inlet 13 and the second outlet 14.

Further, in the preferred embodiment, the first inlet 11 and the communicating pipe of the demineralized water are connected in series with the first valve 3, the first outlet 12 and the communicating pipe of the deaerator are connected in series with the second valve 3, and the second inlet 13 and the communicating pipe of the deaerator exhaust steam are connected in series with the third valve 4.

Further, in the present embodiment, preferably, a fourth valve 5 is connected in series in a pipeline connecting the second outlet 14 to the atmosphere.

Further, in this embodiment, preferably, the fifth valve 7 is connected in series in the third outlet 15 and the drain tank communication pipe.

It should be noted that, the first inlet 11 and the pipeline communicating desalted water are connected in series with a first valve 3, the first outlet 12 and the pipeline communicating deaerator are connected in series with a second valve 3, the second inlet 13 and the pipeline communicating deaerator exhaust steam are connected in series with a third valve 4, the second outlet 14 and the pipeline communicating with the atmosphere are connected in series with a fourth valve 5, the third outlet 15 and the pipeline communicating a drain tank are connected in series with a fifth valve 7, the first valve 2, the second valve 3, the third valve 4, the fourth valve 5 and the fifth valve 7 can be arranged to open or close water or gas, so that the device can be smoothly connected into the deaerator pipeline when needed, thereby realizing the recovery and reuse of deaerator exhaust steam, and in addition, the balance valve 6 is used once the heat exchanger needs to be maintained, the third valve 4 can be closed, the fourth valve 5 can be closed, and the balance valve 6 can be opened, so that the exhaust steam of the deaerator is directly communicated with the atmosphere through the balance valve 6 to realize evacuation; during steady operation, adjusting the opening of the balancing valve 6 also adjusts the pressure and flow of the exhaust steam into the heat exchanger 1.

Further, in the present embodiment, both ends of the balance valve 6 are preferably communicated with the inlet end of the third valve 4 and the outlet end of the fourth valve 5, respectively.

The specific working principle of the embodiment is as follows: the waste steam of the deaerator can be connected with the heat exchanger by a pipeline, and the high-temperature waste steam is used for heating demineralized water, so that the water inlet temperature of the deaerator is increased, the heating steam of the deaerator is saved, and meanwhile, condensed water condensed by the heat exchanger is recycled to a drain tank, and non-condensed gas is directly exhausted to the atmosphere, so that the full utilization of energy is realized; therefore, the steam utilization rate of the deaerator can be greatly improved by recycling the exhaust steam of the deaerator, the heat efficiency of the boiler is improved, fuel and water resources are saved, the production cost of enterprises is reduced, the market competitiveness and benefit of the enterprises are improved, white steam thermal pollution above a plant area is eliminated, the environment of the plant area is beautified, clean production is achieved, and economic benefit and social benefit are really achieved.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a power plant oxygen-eliminating device exhaust steam recovery unit which characterized in that: the heat exchanger (1) comprises a first inlet (11), a first outlet (12), a second inlet (13), a second outlet (14) and a third outlet (15), wherein the first inlet (11) is communicated with desalted water, the first outlet (12) is communicated with a deaerator, the second inlet (13) is communicated with deaerator exhaust steam, the second outlet (14) is communicated with the atmosphere, and the third outlet (15) is communicated with a drain tank; a balance valve (6) is arranged between the second inlet (13) and the second outlet (14).

2. The exhaust steam recovery device of the deaerator of the power plant of claim 1, which is characterized in that: first entry (11) and communicating pipe of demineralized water have concatenated first valve (2) in the way, first export (12) and deaerator intercommunication pipeline have concatenated second valve (3), second entry (13) and deaerator exhaust steam intercommunication have concatenated third valve (4) in the pipeline.

3. The exhaust steam recovery device of the deaerator of the power plant of claim 1, which is characterized in that: and a fourth valve (5) is connected in series in a pipeline for communicating the second outlet (14) with the atmosphere.

4. The exhaust steam recovery device of the deaerator of the power plant of claim 1, which is characterized in that: and a fifth valve (7) is connected in series in the third outlet (15) and the drain tank communicating pipeline.

5. The exhaust steam recovery device of the deaerator of the power plant of claim 2, characterized in that: and two ends of the balance valve (6) are respectively communicated with the inlet end of the third valve (4) and the outlet end of the fourth valve (5).