CN214745667U - Elastic heat regenerative system of parallel steam cooler - Google Patents
Elastic heat regenerative system of parallel steam cooler Download PDFInfo
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- CN214745667U CN214745667U CN202120398257.2U CN202120398257U CN214745667U CN 214745667 U CN214745667 U CN 214745667U CN 202120398257 U CN202120398257 U CN 202120398257U CN 214745667 U CN214745667 U CN 214745667U
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Abstract
The utility model discloses an elastic heat recovery system of a parallel steam cooler, which comprises a high pressure cylinder, an intermediate pressure cylinder, an elastic heat recovery heater and a steam cooler; a steam cooler is arranged on a steam extraction pipeline of the existing regenerative system, a steam inlet of an elastic regenerative heater is communicated with a steam extraction port of a high-pressure cylinder through the steam extraction pipeline of the elastic regenerative heater, water inlets of the elastic regenerative heater and the steam cooler are communicated with a final-stage high-pressure feed water outlet of the existing regenerative system, and water outlets of the elastic regenerative heater and the steam cooler are communicated with a high-pressure feed water inlet of a boiler; an elastic regenerative heater steam extraction regulating valve is arranged on the elastic regenerative heater steam extraction pipeline; the utility model discloses a heat recovery system is a heat recovery system with adjustable part load, can adjust feedwater temperature jointly through adjusting elasticity backheat heater extraction of steam and transferring valve and steam cooler when the unit high load, opens at low-load elasticity backheat heater extraction of steam and transfers the valve, reduces system throttling loss under the condition that satisfies feedwater temperature demand.
Description
Technical Field
The utility model belongs to thermal power factory machine field, concretely relates to elasticity backheat system of parallelly connected steam cooler.
Background
With the continuous increase of the proportion of new energy installed, the peak regulation pressure of the thermal power generating unit is higher and higher, in recent years, the demand of a large-capacity unit for participating in deep peak regulation is increased increasingly, the lowest load of the unit reaches below 25%, and the deep peak regulation causes great harm to the efficiency and safety of the unit and the full-load efficient operation of a denitration system.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to above-mentioned prior art in the problem, provide one kind and can solve for the problem that the temperature degree is too low in the low-load section to promote unit efficiency and adjust the comprehensive solution of taking out vapour superheat degree at full load section homoenergetic at full load section.
In order to realize the purpose, the utility model discloses a technical scheme be: an elastic regenerative system of a parallel steam cooler comprises a high-pressure cylinder, an intermediate-pressure cylinder, an elastic regenerative heater and a steam cooler; a steam cooler is arranged on a steam extraction pipeline of the existing regenerative system, a steam inlet of an elastic regenerative heater is communicated with a steam extraction port of a high-pressure cylinder through the steam extraction pipeline of the elastic regenerative heater, water inlets of the elastic regenerative heater and the steam cooler are communicated with a final-stage high-pressure feed water outlet of the existing regenerative system, and water outlets of the elastic regenerative heater and the steam cooler are communicated with a high-pressure feed water inlet of a boiler; an elastic regenerative heater steam extraction regulating valve is arranged on the elastic regenerative heater steam extraction pipeline.
And an elastic regenerative heater steam extraction pipe seat is arranged on the outer side of the high-pressure cylinder, and the elastic regenerative heater steam extraction pipe is connected with the elastic regenerative heater steam extraction pipe seat.
The steam cooler is arranged on a steam extraction pipeline with a higher superheat degree in the existing regenerative system.
The steam cooler is arranged on the third stage or the fourth stage steam extraction pipeline.
And temperature transmitters are arranged at the high-pressure water supply outlet of the elastic regenerative heater and the steam cooler.
The drain port of the elastic regenerative heater is communicated with a drain pipeline of the heater with the last stage and the first stage in the original regenerative system through a drain pipeline of the elastic regenerative heater.
The steam extraction regulating valve of the elastic regenerative heater is an electric regulating valve and is connected with the output end of the power plant DCS.
The last stage high pressure feed water outlet is communicated with the steam cooler through a feed water pipeline of the steam cooler, a valve is arranged on the feed water pipeline of the steam cooler, and a valve is arranged at the high pressure feed water outlet of the steam cooler.
Compared with the prior art, the utility model discloses following beneficial effect has at least: the water supply temperature can be adjusted by adjusting the steam extraction regulating valve of the elastic regenerative heater at the full load and high load operation stages of the unit, the water supply temperature can be improved as much as possible after passing through a pipeline system consisting of the steam cooler, the elastic regenerative heater and the main water supply pipeline, support is provided for improving the cycle efficiency of the unit, the steam extraction temperature of the stage of steam extraction can be adjusted after the steam cooler is arranged, the steam extraction superheat degree is reduced, the cascade utilization of the stage of steam extraction is realized, the operation life of the stage of steam extraction is prolonged, and the economy of the unit is improved; the steam extraction regulating valve of the elastic regenerative heater is fully opened in the low-load section, so that the throttling loss of the system can be reduced, the water supply temperature is increased as much as possible through the elastic regenerative heater, the water supply temperature requirement required by the normal operation of the denitration system is ensured, the utilization rate of the denitration system is increased, the emission is reduced, and the unit economy is improved; the steam cooler is connected with the elastic regenerative heater in parallel, and compared with a series system, the resistance of a water supply system is reduced, so that the power of a water supply pump is reduced, and the running economy of a power plant is improved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
in the drawings: 1-high pressure cylinder, 2-intermediate pressure cylinder, 3-elastic regenerative heater steam extraction pipe seat, 4-elastic regenerative heater steam extraction pipeline, 5-elastic regenerative heater, 6-elastic regenerative heater steam extraction regulating valve, 7-elastic regenerative heater drain pipeline, 8-steam cooler, 9-final stage high pressure heater, 10-steam cooler water supply pipeline, 11-existing regenerative system.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, an elastic regenerative system of parallel steam coolers comprises a high pressure cylinder 1, an intermediate pressure cylinder 2, an elastic regenerative heater 5 and a steam cooler 8; a steam cooler 8 is arranged on a steam extraction pipeline of the existing regenerative system 11, a steam inlet of an elastic regenerative heater 5 is communicated with a steam extraction port of a high-pressure cylinder 1 through an elastic regenerative heater steam extraction pipeline 4, water inlets of the elastic regenerative heater 5 and the steam cooler 8 are communicated with a final-stage high-pressure 9 high-pressure water supply outlet of the existing regenerative system 11, and water outlets of the elastic regenerative heater 5 and the steam cooler 8 are communicated with a boiler high-pressure water supply inlet; an elastic regenerative heater steam extraction regulating valve 6 is arranged on the elastic regenerative heater steam extraction pipeline 4.
An elastic regenerative heater steam extraction pipe seat 3 is arranged on the outer side of the high-pressure cylinder 1, and an elastic regenerative heater steam extraction pipe 4 is connected with the elastic regenerative heater steam extraction pipe seat 3.
The steam cooler 8 is arranged on a steam extraction pipeline with a higher superheat degree in the existing regenerative system.
The steam cooler 8 is arranged on the third-stage or fourth-stage steam extraction pipeline, so that the cascade utilization of the steam extracted by the steam turbine is more convenient.
The high-pressure water supply outlets of the elastic regenerative heater 5 and the steam cooler 8 are provided with temperature transmitters, so that the outlet temperature can be monitored in real time, and accurate data can be provided for parameter adjustment.
The drain port of the elastic regenerative heater 5 is communicated with a drain pipeline of the last-stage high-pressure heater through a drain pipeline 7 of the elastic regenerative heater, and the drain pipeline of the steam cooler 8 is communicated with a drain pipeline of the last-stage high-pressure heater and the first-stage heater in the original regenerative system.
The elastic regenerative heater steam extraction regulating valve 6 is an electric regulating valve, and the elastic regenerative heater steam extraction regulating valve 6 is connected with the output end of the power plant DCS.
The last stage high-pressure water supply outlet 9 is communicated with the steam cooler 8 through a water supply pipeline 10 of the steam cooler, a valve is arranged on the water supply pipeline 10 of the steam cooler, and a valve is arranged at the high-pressure water supply outlet of the steam cooler 8.
The utility model discloses a regenerative system is a regenerative system with adjustable part load, when the unit is full load and high load, adjusts the supply water temperature and the extraction steam temperature of the extraction steam of steam cooler 8 level jointly through adjusting elastic regenerative heater extraction steam transfer valve 6 and steam cooler 8, opens at low-load elastic regenerative heater extraction steam transfer valve 6 completely, improves the supply water temperature as far as possible, satisfies denitration operation supply water temperature requirement; the utility model discloses an adjust feedwater temperature and get into the high steam extraction temperature that adds and reduce system throttling loss under the condition that satisfies the feedwater temperature demand to guarantee unit deNOx systems safety and stability operation, improve unit economic nature and operating stability.
The utility model discloses steam cooler and elasticity backheat heater are parallelly connected, and during steam cooler and elasticity backheat heater design, can adjust respective resistance and adjust through respective flow to realize final optimal feedwater temperature.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and the scope of the present invention as claimed.
Claims (7)
1. An elastic heat recovery system of a parallel steam cooler is characterized in that: comprises a high pressure cylinder (1), an intermediate pressure cylinder (2), an elastic regenerative heater (5) and a steam cooler (8); a steam cooler (8) is arranged on a steam extraction pipeline of the existing regenerative system (11), a steam inlet of an elastic regenerative heater (5) is communicated with a steam extraction port of a high-pressure cylinder (1) through the steam extraction pipeline (4) of the elastic regenerative heater, water inlets of the elastic regenerative heater (5) and the steam cooler (8) are communicated with a water supply outlet of a last-stage high-pressure heater (9) of the existing regenerative system (11), and water outlets of the elastic regenerative heater (5) and the steam cooler (8) are communicated with a high-pressure water supply inlet of a boiler; an elastic regenerative heater steam extraction regulating valve (6) is arranged on the elastic regenerative heater steam extraction pipeline (4).
2. The flexible regenerative system of parallel steam coolers of claim 1, wherein: an elastic regenerative heater steam extraction pipe seat (3) is arranged on the outer side of the high-pressure cylinder (1), and an elastic regenerative heater steam extraction pipe (4) is connected with the elastic regenerative heater steam extraction pipe seat (3).
3. The flexible regenerative system of parallel steam coolers of claim 1, wherein: the steam cooler (8) is arranged on the third stage or the fourth stage steam extraction pipeline.
4. The flexible regenerative system of parallel steam coolers of claim 1, wherein: temperature transmitters are arranged at the high-pressure water supply outlets of the elastic regenerative heater (5) and the steam cooler (8).
5. The flexible regenerative system of parallel steam coolers of claim 1, wherein: the drain port of the elastic regenerative heater (5) is communicated with the drain pipeline of the heater with the last stage and the first stage in the original regenerative system through the drain pipeline (7) of the elastic regenerative heater, and the drain pipeline of the steam cooler (8) is communicated with the drain pipeline of the heater with the last stage and the first stage in the original regenerative system.
6. The flexible regenerative system of parallel steam coolers of claim 1, wherein: the steam extraction regulating valve (6) of the elastic regenerative heater is an electric regulating valve, and the steam extraction regulating valve (6) of the elastic regenerative heater is connected with the output end of the power plant DCS.
7. The flexible regenerative system of parallel steam coolers of claim 1, wherein: the high-pressure water supply outlet of the last stage high-pressure heater (9) is communicated with the steam cooler (8) through a water supply pipeline (10) of the steam cooler, a valve is arranged on the water supply pipeline (10) of the steam cooler, and a valve is arranged at the high-pressure water supply outlet of the steam cooler (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120398257.2U CN214745667U (en) | 2021-02-23 | 2021-02-23 | Elastic heat regenerative system of parallel steam cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120398257.2U CN214745667U (en) | 2021-02-23 | 2021-02-23 | Elastic heat regenerative system of parallel steam cooler |
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| Publication Number | Publication Date |
|---|---|
| CN214745667U true CN214745667U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120398257.2U Active CN214745667U (en) | 2021-02-23 | 2021-02-23 | Elastic heat regenerative system of parallel steam cooler |
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| CN (1) | CN214745667U (en) |
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2021
- 2021-02-23 CN CN202120398257.2U patent/CN214745667U/en active Active
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