CN216281320U

CN216281320U - Hydrophobic steam-water separation device of boiler evaporator

Info

Publication number: CN216281320U
Application number: CN202122318211.8U
Authority: CN
Inventors: 龚金新; 任建华
Original assignee: Jianli Wangneng Environmental Protection Energy Co ltd
Current assignee: Jianli Wangneng Environmental Protection Energy Co ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-04-12
Anticipated expiration: 2031-09-24

Abstract

The utility model discloses a hydrophobic steam-water separation device of a boiler evaporator, which comprises an evaporator assembly, a steam-water separator and a hydrophobic tank, wherein the evaporator assembly is provided with an air channel and a steam channel which are separated from each other; the steam channel of the pre-evaporator assembly is provided with a first input end communicated with the output end of the steam turbine, a second input end communicated with the boiler drum and a condensation end; the condensation end of the steam channel is communicated with a steam inlet arranged in the middle of the steam-water separator; the upper part and the lower part of the steam-water separator are respectively provided with a steam discharge port and a drain port, and the drain port of the steam-water separator is communicated with the drain tank. The hydrophobic steam-water separation device of the boiler evaporator provided by the utility model has the advantages that the steam evaporator is hydrophobic smoothly, and the problem of pipeline water hammer is avoided.

Description

Hydrophobic steam-water separation device of boiler evaporator

Technical Field

The utility model relates to the field of steam treatment of boiler power generation, in particular to a hydrophobic steam-water separation device of a boiler preheater.

Background

In a thermal power plant system of a boiler, part of steam generated by a boiler steam drum enters a steam turbine to generate power, and the other part of the steam passes through a pre-evaporator to heat air ready to enter the boiler, so that the air inlet temperature of the boiler is increased, and the energy consumption is reduced. However, at present, the condensation end of the pre-evaporator is directly connected with the drain tank through a drain pipe, and as the water body output from the condensation end of the pre-evaporator still contains more steam to form a steam-water mixture, the pre-evaporator is not smooth in drainage and the pipe is subjected to water hammer, wherein the water hammer is the phenomenon that the instantaneous pressure is obvious, repeated and rapidly changed due to the rapid change of the flow velocity of the liquid in the pipe. The normal operation of the equipment can be influenced when the drainage is not smooth and the pipeline water hammer is serious.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a steam-water separation device for the steam condenser of a boiler, which has smooth drainage of the steam condenser and avoids the problem of water hammer of a pipeline.

In order to achieve the aim, the utility model provides a hydrophobic steam-water separation device of a boiler evaporator, which comprises an evaporator assembly, a steam-water separator and a hydrophobic tank, wherein the evaporator assembly is provided with an air channel and a steam channel which are separated from each other; the steam channel of the pre-evaporator assembly is provided with a first input end communicated with the output end of the steam turbine, a second input end communicated with the boiler drum and a condensation end; the condensation end of the steam channel is communicated with a steam inlet arranged in the middle of the steam-water separator; the upper part and the lower part of the steam-water separator are respectively provided with a steam discharge port and a drain port, and the drain port of the steam-water separator is communicated with the drain tank.

As a further improvement of the utility model, a steam outlet of the steam-water separator is connected with a deaerator.

As a further improvement of the utility model, the pre-steaming device assembly comprises a primary pre-steaming device and a secondary pre-steaming device which are both provided with an air channel and a steam channel; the first input end of the pre-steaming device assembly is arranged on a steam channel of the primary pre-steaming device, and the output end of the steam channel of the primary pre-steaming device is connected with a primary steam extraction pipe of a steam turbine; the second input end of the steam preheater assembly is arranged on a steam channel of the secondary steam preheater; the steam channels of the first-stage steam preheater and the second-stage steam preheater are isolated from each other.

As a further improvement of the present invention, the steam-water separator includes a second steam-water separator and a first steam-water separator; the condensation end of the secondary steam preheater is communicated with a steam inlet of the second steam-water separator through a second condensation pipeline, and a second condensation stop valve is arranged on the second condensation pipeline; the condensation end of the first-level pre-evaporator is communicated with the steam inlet of the first steam-water separator through a first condensation pipeline, and a first condensation stop valve is arranged on the first condensation pipeline.

As a further improvement of the utility model, a drain port of the second steam-water separator is connected with a drain tank through a second drain pipe, and the second drain pipe is connected with a second drain stop valve and a second drain valve; the drain port of the first steam-water separator is connected with the drain tank through a first drain pipe, and the first drain pipe is connected with a first drain stop valve and a first drain valve.

As a further improvement of the utility model, the steam outlet of the second steam-water separator is communicated with the deaerator through a second steam exhaust pipe, and the second steam exhaust pipe is connected with a second steam exhaust stop valve; the steam outlet of the first steam-water separator is communicated with the deaerator through a first steam exhaust pipe, and a first steam exhaust stop valve is connected to the first steam exhaust pipe.

Advantageous effects

Compared with the prior art, the hydrophobic steam-water separation device of the boiler pre-evaporator has the advantages that:

1. set up catch water through evaporating between the steam channel condensation end and the drain trap of ware assembly in advance, make evaporate ware hydrophobic catch water in advance, avoid the steam-water mixture to cause the impact to the pipeline, prolong the life of pipeline, pressure stability when also can ensureing the oxygen-eliminating device in addition moves, catch water is effectual.

2. Steam input by a steam turbine passes through a steam channel of the first-stage pre-evaporator, steam output by a boiler drum passes through a steam channel of the second-stage pre-evaporator, so that air passing through two air channels of the two pre-evaporators is heated, heated air enters the boiler, primary air is heated twice by the first stage and the second stage to obtain a higher air temperature effect, and the two units are independent at the steam part of the pre-evaporators, so that two sets of independent operation are arranged in the steam-water separator.

The utility model will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a boiler pre-evaporator hydrophobic steam-water separation unit;

FIG. 2 is an enlarged schematic view of the digester assembly;

FIG. 3 is a cross-sectional view of a second steam-water separator.

Detailed Description

Embodiments of the present invention will now be described with reference to the accompanying drawings.

Examples

The specific implementation mode of the utility model is shown in fig. 1 to 3, and the boiler evaporator hydrophobic steam-water separation device comprises an evaporator assembly, a steam-water separator and a hydrophobic tank 15, wherein the evaporator assembly is provided with an air channel and a steam channel which are separated from each other; the steam channel of the pre-evaporator assembly is provided with a first input end communicated with the output end of the steam turbine, a second input end communicated with the boiler drum and a condensation end; the condensing end of the steam channel is communicated with a steam inlet arranged in the middle of the steam-water separator. The upper part and the lower part of the steam-water separator are respectively provided with a steam discharge port and a drain port, and the drain port of the steam-water separator is communicated with the drain tank 15. The upper part and the lower part of the steam-water separator are respectively provided with a steam discharge port and a drain port, and the drain port of the steam-water separator is communicated with a drain tank 15. The drain tank 15 is used for storing the recovered condensed water.

The steam preheater assembly can heat air to be fed into the boiler by utilizing heat of steam output from both the boiler drum and the steam turbine, and an air channel of the steam preheater assembly is communicated with the boiler.

The steam outlet of the steam-water separator is connected with a deaerator 12. The deaerator is one of the key equipments of boiler and heat supply system, and can remove oxygen and other gases dissolved in feed water, and can prevent and reduce corrosion of boiler feed water pipe, coal economizer and other auxiliary equipments.

In this embodiment, the pre-evaporator assembly includes a first-stage pre-evaporator 4 and a second-stage pre-evaporator 3 both provided with an air passage and a steam passage. The first input end of the pre-steaming device assembly is arranged on a steam channel of the first-stage pre-steaming device 4, and the output end of the steam channel of the first-stage pre-steaming device 4 is connected with a first-stage steam extraction pipe 16 of a steam turbine. The second input end of the pre-steaming device assembly is arranged on a steam channel of the secondary pre-steaming device 3 and is connected with a boiler drum connecting pipe 1, and the boiler drum connecting pipe 1 leads the steam output from the boiler drum into the steam channel of the secondary pre-steaming device 3. The steam channels of the first-stage steam pre-heater 4 and the second-stage steam pre-heater 3 are isolated from each other, and the air channels of the first-stage steam pre-heater and the second-stage steam pre-heater are communicated with each other.

The steam-water separator comprises a second steam-water separator 5 and a first steam-water separator 6. The condensation end of the second-stage pre-evaporator 3 is communicated with the steam inlet of the second steam-water separator 5 through a second condensation pipeline 7, and a second condensation stop valve 71 is arranged on the second condensation pipeline 7. The condensation end of the first-level pre-evaporator 4 is communicated with the steam inlet of the first steam-water separator 6 through a first condensation pipeline 8, and a first condensation stop valve 81 is arranged on the first condensation pipeline 8. The second steam-water separator 5 and the first steam-water separator 6 have the same structure, and the second steam-water separator 5 includes a first steam inlet 51, a first steam outlet 52, and a first drain port 53. The steam-water separator 5 is vertically arranged in a cylindrical shape, the first steam outlet 52, the first steam inlet 51 and the first drain outlet 53 are sequentially arranged from top to bottom, a guide channel corresponding to the first steam inlet 51 is arranged in the second steam-water separator 5, and the output end of the guide channel faces downwards, so that steam-water separation is facilitated.

The drain port of the second steam-water separator 5 is connected to the drain tank 15 through a second drain pipe 13, and the second drain pipe 13 is connected to a second drain stop valve 131 and a second drain valve 132. The drain port of the first steam-water separator 6 is connected to the drain tank 15 through a first drain pipe 14, and the first drain pipe 14 is connected to a first drain stop valve 141 and a first drain valve 142.

The steam outlet of the second steam-water separator 5 is communicated with the deaerator 12 through a second steam exhaust pipe 9, and the second steam exhaust pipe 9 is connected with a second steam exhaust stop valve 91. The steam outlet of the first steam-water separator 6 is communicated with the deaerator 12 through a first steam outlet pipe 10, and the first steam outlet pipe 10 is connected with a first steam outlet stop valve 101.

When the steam boiler works, steam input by the steam turbine passes through the steam channel of the first-stage pre-evaporator 4, steam output by the boiler drum passes through the steam channel of the second-stage pre-evaporator 3, so that air passing through the two pre-evaporator air channels is heated, and the heated air enters the boiler. The steam which is not condensed in the primary steam preheater 4 is discharged from the primary steam extraction pipe 16 of the steam turbine, and the steam which is not condensed in the secondary steam preheater 3 is discharged from a steam outlet. The steam-water mixture condensed in the steam channels of the second-stage pre-evaporator 3 and the first-stage pre-evaporator 4 respectively enters the second steam-water separator 5 and the first steam-water separator 6 through the second condensation pipeline 7 and the first condensation pipeline 8, the steam-water mixture entering the steam-water separators is subjected to steam-water separation again, steam is upwards discharged from a steam outlet and enters the deaerator 12 through a steam discharge pipe, and condensed water is downwards discharged from a drain port and enters the drain tank 15 through the drain pipe.

The present invention has been described in connection with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, and is intended to cover various modifications, equivalent combinations, which are made in accordance with the spirit of the present invention.

Claims

1. The hydrophobic steam-water separation device of the boiler evaporator is characterized by comprising an evaporator assembly, a steam-water separator and a hydrophobic tank (15), wherein the evaporator assembly is provided with an air channel and a steam channel which are separated from each other; the steam channel of the pre-evaporator assembly is provided with a first input end communicated with the output end of the steam turbine, a second input end communicated with the boiler drum and a condensation end; the condensation end of the steam channel is communicated with a steam inlet arranged in the middle of the steam-water separator; the upper part and the lower part of the steam-water separator are respectively provided with a steam discharge port and a drain port, and the drain port of the steam-water separator is communicated with the drain tank (15).

2. The hydrophobic steam-water separation device of the boiler evaporator according to claim 1, characterized in that a deaerator (12) is connected to a steam outlet of the steam-water separator.

3. The hydrophobic steam-water separation device of the boiler evaporator according to claim 2, characterized in that the evaporator assembly comprises a primary evaporator (4) and a secondary evaporator (3) which are both provided with an air channel and a steam channel; the first input end of the pre-steaming device assembly is arranged on a steam channel of the primary pre-steaming device (4), and the output end of the steam channel of the primary pre-steaming device (4) is connected with a primary steam extraction pipe (16) of a steam turbine; the second input end of the pre-steaming device assembly is arranged on a steam channel of the secondary pre-steaming device (3); the steam channels of the first-stage steam preheater (4) and the second-stage steam preheater (3) are isolated from each other.

4. The boiler pre-evaporator hydrophobic steam-water separation device according to claim 3, characterized in that the steam-water separator comprises a second steam-water separator (5) and a first steam-water separator (6); the condensation end of the secondary steam preheater (3) is communicated with the steam inlet of the second steam-water separator (5) through a second condensation pipeline (7), and a second condensation stop valve (71) is arranged on the second condensation pipeline (7); the condensation end of the first-level pre-evaporator (4) is communicated with the steam inlet of the first steam-water separator (6) through a first condensation pipeline (8), and a first condensation stop valve (81) is arranged on the first condensation pipeline (8).

5. The boiler evaporator hydrophobic steam-water separation device according to claim 4, characterized in that the hydrophobic port of the second steam-water separator (5) is connected with the hydrophobic tank (15) through a second hydrophobic pipe (13), and a second hydrophobic stop valve (131) and a second hydrophobic valve (132) are connected on the second hydrophobic pipe (13); the drain port of the first steam-water separator (6) is connected with a drain tank (15) through a first drain pipe (14), and the first drain pipe (14) is connected with a first drain stop valve (141) and a first drain valve (142).

6. The hydrophobic steam-water separation device of the boiler pre-evaporator according to claim 5, characterized in that a steam outlet of the second steam-water separator (5) is communicated with a deaerator (12) through a second steam discharge pipe (9), and the second steam discharge pipe (9) is connected with a second steam discharge stop valve (91); the steam outlet of the first steam-water separator (6) is communicated with the deaerator (12) through a first steam outlet pipe (10), and the first steam outlet pipe (10) is connected with a first steam outlet stop valve (101).