CN108506921B - Medium-high pressure industrial steam supply system and method for power station boiler - Google Patents
Medium-high pressure industrial steam supply system and method for power station boiler Download PDFInfo
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- CN108506921B CN108506921B CN201810379350.1A CN201810379350A CN108506921B CN 108506921 B CN108506921 B CN 108506921B CN 201810379350 A CN201810379350 A CN 201810379350A CN 108506921 B CN108506921 B CN 108506921B
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- 238000000034 method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims description 30
- 238000000605 extraction Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
Abstract
The invention discloses a medium-high pressure industrial steam supply system and a method of a power station boiler, comprising a boiler, a steam-water separator, a steam-steam heat exchanger, a medium-temperature reheater outlet header and a high-temperature reheater inlet header; the water-cooled wall outlet of the boiler is communicated with the inlet of the steam-water separator, the water outlet of the steam-water separator is communicated with the water-cooled wall inlet of the boiler, the steam outlet of the steam-water separator is communicated with the low-temperature side inlet of the steam-steam heat exchanger, the low-temperature side outlet of the steam-steam heat exchanger is communicated with an external industrial steam supply system, the high-temperature side inlet of the steam-steam heat exchanger is communicated with the outlet of the medium-temperature reheater outlet header, and the high-temperature side outlet of the steam-steam heat exchanger is communicated with the high-temperature reheater inlet header.
Description
Technical Field
The invention belongs to the technical field of thermal power generation, and relates to a medium-high pressure industrial steam supply system and method of a power station boiler.
Background
In order to meet the national policy requirements of energy conservation and emission reduction and realize the maximization of enterprise benefits, the demand of industrial steam supply is unprecedented. The low-pressure steam can be satisfied by the intermediate-stage extraction of the steam turbine, for example, the medium-pressure cylinder extraction or the high-pressure cylinder extraction. However, if the parameters (pressure) of the industrial steam are higher than those of any stage of steam extraction (including first stage steam extraction and high-pressure cylinder steam extraction) of the steam turbine, the steam turbine side steam extraction cannot meet the requirements, and the direct use of main steam for temperature and pressure reduction causes great waste of effective energy. At present, the supply requirements of medium-high pressure parameter steam are more and more, but the steam extraction of the conventional generator set can not realize the stable medium-high pressure parameter industrial steam supply with larger flow.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a medium-high pressure industrial steam supply system and a method for a power station boiler, which can provide large flow and stable medium-high pressure parameter industrial steam supply.
In order to achieve the aim, the medium-high pressure industrial steam supply system of the power station boiler comprises a boiler, a steam-water separator, a steam-steam heat exchanger, a medium-temperature reheater outlet header and a high-temperature reheater inlet header; the outlet of the water-cooled wall of the boiler is communicated with the inlet of the steam-water separator, the water outlet of the steam-water separator is communicated with the inlet of the water-cooled wall of the boiler, the steam outlet of the steam-water separator is communicated with the low-temperature side inlet of the steam-steam heat exchanger, the low-temperature side outlet of the steam-steam heat exchanger is communicated with an external industrial steam supply system, the high-temperature side inlet of the steam-steam heat exchanger is communicated with the outlet of the medium-temperature reheater outlet header, and the high-temperature side outlet of the steam-steam heat exchanger is communicated with the high-temperature reheater inlet header.
The steam outlet of the steam-water separator is communicated with the low-temperature side inlet of the steam-water heat exchanger through a first regulating valve.
The outlet of the intermediate temperature reheater outlet header is communicated with the high Wen Ceru port of the steam-steam heat exchanger through a second regulating valve.
The medium-high pressure industrial steam supply method of the utility boiler comprises the following steps:
When the unit has no industrial steam supply requirement, the first regulating valve and the second regulating valve are closed, so that the industrial steam supply system is completely separated;
When the industrial steam supply system has certain middle-high pressure industrial steam supply requirement, the first regulating valve and the second regulating valve are opened, and the steam flow and the steam pressure after the valve are regulated by the first regulating valve, so that the pressure and flow parameters required by industrial steam supply are met; the flow of the high-temperature side steam entering the steam-steam heat exchanger is regulated by the second regulating valve, so that the temperature of the steam at the low-temperature side of the steam-steam heat exchanger is increased to the temperature required by industrial steam supply, and meanwhile, the temperature of the steam entering an outlet header of the high-temperature reheater is reduced, and the overtemperature of the high-temperature reheater is avoided.
The invention has the following beneficial effects:
When the medium-high pressure industrial steam supply system and method of the utility boiler are specifically operated, steam separated by the steam-water separator enters the low-temperature side of the steam-steam heat exchanger, steam output by the outlet header of the medium-temperature reheater enters the high-temperature side of the steam-steam heat exchanger and heats the steam at the low-temperature side of the steam-steam heat exchanger, so that the steam at the low-temperature side of the steam-steam heat exchanger is heated to the temperature required by industrial steam supply, the industrial steam output by the steam-steam heat exchanger enters the industrial steam supply system, large-flow and stable medium-high pressure parameter industrial steam supply is realized, the steam output by the high-temperature side of the steam-steam heat exchanger enters the outlet header of the high-temperature reheater, the steam temperature of the steam at the high-temperature side is reduced, the overtemperature of the high-temperature reheater is avoided, the structure is simple, the operation is convenient, and the practicability is extremely strong.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Wherein, 1 is boiler, 2 is steam-water separator, 3 is first governing valve, 4 is steam-water heat exchanger, 5 is the second governing valve.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
Referring to fig. 1, the medium-high pressure industrial steam supply system of the utility boiler comprises a boiler 1, a steam-water separator 2, a steam-steam heat exchanger 4, a medium-temperature reheater outlet header and a high-temperature reheater inlet header; the water-cooled wall outlet of the boiler 1 is communicated with the inlet of the steam-water separator 2, the water outlet of the steam-water separator 2 is communicated with the water-cooled wall inlet of the boiler 1, the steam outlet of the steam-water separator 2 is communicated with the low-temperature side inlet of the steam-steam heat exchanger 4, the low-temperature side outlet of the steam-steam heat exchanger 4 is communicated with an external industrial steam supply system, the high-temperature side inlet of the steam-steam heat exchanger 4 is communicated with the outlet of the medium-temperature reheater outlet header, and the high-temperature side outlet of the steam-steam heat exchanger 4 is communicated with the high-temperature reheater inlet header.
The steam outlet of the steam-water separator 2 is communicated with the low-temperature side inlet of the steam-water heat exchanger 4 through a first regulating valve 3; the outlet of the intermediate temperature reheater outlet header is communicated with the high Wen Ceru port of the steam-steam heat exchanger 4 through a second regulating valve 5.
The medium-high pressure industrial steam supply method of the utility boiler comprises the following steps:
when the unit has no industrial steam supply requirement, the first regulating valve 3 and the second regulating valve 5 are closed, so that the industrial steam supply system is completely separated, and the normal operation of the unit is not affected.
When the industrial steam supply system has a certain middle-high pressure industrial steam supply requirement, the first regulating valve 3 and the second regulating valve 5 are opened, and the steam flow and the steam pressure after the valve are regulated by the first regulating valve 3, so that the pressure and flow parameters required by industrial steam supply are met; the flow of the high-temperature side steam entering the steam-steam heat exchanger 4 is regulated by the second regulating valve 5, so that the temperature of the steam at the low-temperature side of the steam-steam heat exchanger 4 is increased to the temperature required by industrial steam supply, and meanwhile, the temperature of the steam entering an outlet header of the high-temperature reheater is reduced, and the problem of overtemperature of the high-temperature reheater is avoided.
Claims (4)
1. The medium-high pressure industrial steam supply system of the utility boiler is characterized by comprising a boiler (1), a steam-water separator (2), a steam-steam heat exchanger (4), a medium-temperature reheater outlet header and a high-temperature reheater inlet header; the water-cooled wall outlet of the boiler (1) is communicated with the inlet of the steam-water separator (2), the water outlet of the steam-water separator (2) is communicated with the water-cooled wall inlet of the boiler (1), the steam outlet of the steam-water separator (2) is communicated with the low-temperature side inlet of the steam-steam heat exchanger (4), the low-temperature side outlet of the steam-steam heat exchanger (4) is communicated with an external industrial steam supply system, the high-temperature side inlet of the steam-steam heat exchanger (4) is communicated with the outlet of the medium-temperature reheater outlet header, and the high-temperature side outlet of the steam-steam heat exchanger (4) is communicated with the high-temperature reheater inlet header.
2. The medium-high pressure industrial steam supply system of a utility boiler according to claim 1, characterized in that the steam outlet of the steam-water separator (2) is connected to the low temperature side inlet of the steam-steam heat exchanger (4) via a first regulating valve (3).
3. The medium-high pressure industrial steam supply system of the utility boiler according to claim 2, characterized in that the outlet of the medium-temperature reheater outlet header is communicated with the high Wen Ceru port of the steam-steam heat exchanger (4) through the second regulating valve (5).
4. A method for supplying medium-high pressure industrial steam for a utility boiler, characterized in that the medium-high pressure industrial steam supply system based on the utility boiler of claim 3 comprises the following steps:
when the unit has no industrial steam supply requirement, the first regulating valve (3) and the second regulating valve (5) are closed, so that the industrial steam supply system is completely separated;
When the industrial steam supply system has a certain middle-high pressure industrial steam supply requirement, the first regulating valve (3) and the second regulating valve (5) are opened, and the steam flow and the steam pressure after the valve are regulated through the first regulating valve (3) so that the industrial steam supply meets the required pressure and flow parameters; the steam flow entering the high-temperature side of the steam-steam heat exchanger (4) is regulated through the second regulating valve (5), so that the steam at the low-temperature side of the steam-steam heat exchanger (4) is heated to the temperature required by industrial steam supply, and meanwhile, the temperature of the steam entering the outlet header of the high-temperature reheater is reduced, and the overtemperature of the high-temperature reheater is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810379350.1A CN108506921B (en) | 2018-04-25 | 2018-04-25 | Medium-high pressure industrial steam supply system and method for power station boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810379350.1A CN108506921B (en) | 2018-04-25 | 2018-04-25 | Medium-high pressure industrial steam supply system and method for power station boiler |
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| Publication Number | Publication Date |
|---|---|
| CN108506921A CN108506921A (en) | 2018-09-07 |
| CN108506921B true CN108506921B (en) | 2024-04-30 |
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| CN201810379350.1A Active CN108506921B (en) | 2018-04-25 | 2018-04-25 | Medium-high pressure industrial steam supply system and method for power station boiler |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1010594A3 (en) * | 1996-09-02 | 1998-11-03 | Cockerill Mech Ind Sa | Process for conducting the boiler boiler and forced circulation for its implementation. |
| DE102006048538A1 (en) * | 2006-10-13 | 2008-04-17 | Hitachi Power Europe Gmbh | Single pass boiler or single pass extraction steam generator, has separation walls dividing flue gas string into standard strings with areas forming flue gas channel, where one string is attached to control butterfly valve |
| CN103328887A (en) * | 2010-04-29 | 2013-09-25 | 西门子公司 | Method and device for controlling the temperature of steam in a boiler |
| CN103808178A (en) * | 2012-11-09 | 2014-05-21 | 中国科学院过程工程研究所 | Sub-control phase-change heat exchange system and method based on grading combination heat exchange |
| CN203927862U (en) * | 2014-05-16 | 2014-11-05 | 淮南中科储能科技有限公司 | Paddy electric smelting salt heat accumulation biofermentation steam generating system |
| CN205261518U (en) * | 2015-10-31 | 2016-05-25 | 中建科技（福州）有限公司 | Steaming system |
| CN205480920U (en) * | 2016-03-14 | 2016-08-17 | 西安热工研究院有限公司 | System for power station unit auxiliary steam header utilizes local boiler to supply vapour |
| CN206222288U (en) * | 2016-11-27 | 2017-06-06 | 冯伟忠 | A kind of Steam Cooler System |
| CN207196593U (en) * | 2017-09-19 | 2018-04-06 | 南京电力设备质量性能检验中心 | It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology |
| CN208124260U (en) * | 2018-04-25 | 2018-11-20 | 西安西热节能技术有限公司 | A kind of mesohigh industry steam-supplying system of station boiler |
-
2018
- 2018-04-25 CN CN201810379350.1A patent/CN108506921B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1010594A3 (en) * | 1996-09-02 | 1998-11-03 | Cockerill Mech Ind Sa | Process for conducting the boiler boiler and forced circulation for its implementation. |
| DE102006048538A1 (en) * | 2006-10-13 | 2008-04-17 | Hitachi Power Europe Gmbh | Single pass boiler or single pass extraction steam generator, has separation walls dividing flue gas string into standard strings with areas forming flue gas channel, where one string is attached to control butterfly valve |
| CN103328887A (en) * | 2010-04-29 | 2013-09-25 | 西门子公司 | Method and device for controlling the temperature of steam in a boiler |
| CN103808178A (en) * | 2012-11-09 | 2014-05-21 | 中国科学院过程工程研究所 | Sub-control phase-change heat exchange system and method based on grading combination heat exchange |
| CN203927862U (en) * | 2014-05-16 | 2014-11-05 | 淮南中科储能科技有限公司 | Paddy electric smelting salt heat accumulation biofermentation steam generating system |
| CN205261518U (en) * | 2015-10-31 | 2016-05-25 | 中建科技（福州）有限公司 | Steaming system |
| CN205480920U (en) * | 2016-03-14 | 2016-08-17 | 西安热工研究院有限公司 | System for power station unit auxiliary steam header utilizes local boiler to supply vapour |
| CN206222288U (en) * | 2016-11-27 | 2017-06-06 | 冯伟忠 | A kind of Steam Cooler System |
| CN207196593U (en) * | 2017-09-19 | 2018-04-06 | 南京电力设备质量性能检验中心 | It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology |
| CN208124260U (en) * | 2018-04-25 | 2018-11-20 | 西安西热节能技术有限公司 | A kind of mesohigh industry steam-supplying system of station boiler |
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| CN108506921A (en) | 2018-09-07 |
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