CN109442382B - Water supply system of gas power generation boiler - Google Patents
Water supply system of gas power generation boiler Download PDFInfo
- Publication number
- CN109442382B CN109442382B CN201811451558.6A CN201811451558A CN109442382B CN 109442382 B CN109442382 B CN 109442382B CN 201811451558 A CN201811451558 A CN 201811451558A CN 109442382 B CN109442382 B CN 109442382B
- Authority
- CN
- China
- Prior art keywords
- water supply
- pipe
- regulating valve
- low
- steam drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 238000010248 power generation Methods 0.000 title abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims abstract description 50
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/26—Automatic feed-control systems
- F22D5/34—Applications of valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a water supply system of a gas power generation boiler, which comprises the following components: the system comprises a water supply main pipe, wherein at least two boiler water supply pumps are connected in parallel on the water supply main pipe, an outlet of the water supply main pipe is communicated with a steam drum through a steam drum water supply pipe, and is simultaneously communicated with a low-temperature superheater through a low-temperature superheater water supply pipe, a first electric regulating valve, a first main regulating valve and a second electric regulating valve are sequentially arranged on the steam drum water supply pipe, a steam drum water supply bypass pipe with a first bypass valve is connected in parallel on the steam drum water supply pipe, a third electric regulating valve, a second main regulating valve and a fourth electric regulating valve are sequentially arranged on the low-temperature superheater water supply pipe along the medium flowing direction, and a low-temperature superheater water supply bypass pipe with a second bypass valve is connected in parallel on the low-temperature superheater water supply pipe. The invention has the advantages that: the operation stability and the use safety are high, the regulating valve and the boiler feed pump can be maintained on line, the safety and the smoothness of a gas power generation boiler production system are ensured, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of gas power generation boilers, in particular to a water supply system of a gas power generation boiler.
Background
The water supply system of the gas power generation boiler is an important component part of the production of the gas power generation boiler and is mainly used for supplying water to a steam drum of the gas power generation boiler so as to control the steam generation amount of the gas power generation boiler. The structure of the gas power generation boiler comprises: the boiler comprises a boiler body and a low-temperature superheater, wherein an upper header is arranged above the boiler body, a steam drum is arranged above the upper header, a lower header is arranged below the boiler body, a water outlet of the steam drum is communicated with an inlet of the lower header through a descending pipe arranged outside the boiler body in a surrounding manner, an outlet of the lower header is communicated with an inlet of the upper header through a ascending pipe arranged inside the boiler body, an outlet of the upper header is communicated with a steam inlet of the steam drum, and a steam outlet of the steam drum is communicated with a steam inlet of the low-temperature superheater.
When the gas power generation boiler is produced, hot water in a condenser of a condensing steam turbine is pumped into the steam drum from a water supply port of the steam drum, meanwhile, hot water entering the steam drum enters a lower header through a descending pipe and then enters all ascending pipes through the lower header, hot water exchanges heat with high-temperature gas generated in a furnace body when passing through the ascending pipes to form a steam-water mixture, the steam-water mixture enters the upper header and then enters the steam drum through the upper header, the steam-water mixture entering the steam drum is separated into saturated steam and water in the steam drum, the saturated steam in the steam drum enters the low-temperature superheater through a steam outlet, the saturated steam entering the low-temperature superheater exchanges heat with the hot water entering the low-temperature superheater to form superheated steam, and the superheated steam is used by the steam turbine of the condensing steam turbine and simultaneously, and the hot water in the low-temperature superheater exchanges heat with the saturated steam is returned to the steam drum. The water supply system of the coal gas power generation boiler currently used comprises a water supply main pipe provided with a regulating valve and a boiler water supply pump. The water supply system of the gas power generation boiler has the following defects: the operation stability and the use safety are low, when the regulating valve or the boiler feed water pump fails, the whole gas power generation boiler production system is stopped to maintain the regulating valve or the boiler feed water pump, the safety and the smoothness of the gas power generation boiler production system can not be ensured, and the production efficiency is affected.
Disclosure of Invention
The invention aims to provide a water supply system of a gas power generation boiler, which has high operation stability and high use safety.
In order to achieve the above purpose, the invention adopts the following technical scheme: the water supply system of the gas power generation boiler comprises: the water supply main pipe is characterized in that: the water supply main pipe is at least connected with two boiler water supply pumps in parallel, an outlet of the water supply main pipe is communicated with a water supply port of a steam drum through a steam drum water supply pipe, and is simultaneously communicated with a water inlet of a low-temperature superheater through a low-temperature superheater water supply pipe, a first electric control valve, a first main control valve and a second electric control valve are sequentially arranged on the steam drum water supply pipe along the medium flow direction, a steam drum water supply bypass pipe with a first bypass valve is connected in parallel on the steam drum water supply pipe, one side pipe end of the steam drum water supply bypass pipe is connected with the steam drum water supply pipe in front of the first electric control valve, the other side pipe end of the steam drum water supply bypass pipe is connected with the steam drum water supply pipe behind the second electric control valve, a third electric control valve, a second main control valve and a fourth electric control valve are sequentially arranged on the low-temperature superheater water supply pipe along the medium flow direction, one side pipe end of the low-temperature superheater water supply pipe is connected with the low-temperature bypass pipe with the second bypass valve in parallel, and the other side pipe end of the low-temperature superheater water supply bypass pipe is connected with the low-temperature superheater water supply pipe behind the fourth electric control valve.
Further, the foregoing gas power generation boiler water supply system, wherein: the steam drum water supply pipe behind the second electric regulating valve is communicated with a water supply exhaust pipe, and a water supply exhaust valve is arranged on the water supply exhaust pipe.
Further, the foregoing gas power generation boiler water supply system, wherein: a fifth electric regulating valve, a manual regulating valve and a flowmeter are arranged on the water supply main pipe.
Further, the foregoing gas power generation boiler water supply system, wherein: a flowmeter is arranged on the steam drum water supply pipe behind the second electric regulating valve.
Further, the foregoing gas power generation boiler water supply system, wherein: a flowmeter is arranged on the low-temperature superheater water supply pipe behind the fourth electric regulating valve.
Through implementation of the technical scheme, the invention has the beneficial effects that: the operation stability and the use safety are high, the regulating valve and the boiler feed pump can be maintained on line, the safety and the smoothness of a gas power generation boiler production system are ensured, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the water supply system of a gas power generation boiler according to the present invention.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1, the water supply system of the gas power generation boiler comprises: in the embodiment, the two boiler feed pumps 2 are connected in parallel on the feed header pipe 1, when the boiler feed pump is in operation, the two boiler feed pumps 2 are first connected in parallel on the feed header pipe 1, the outlet of the feed header pipe 1 is communicated with the feed port of a steam drum 4 through the steam drum feed pipe 3 and is simultaneously communicated with the water inlet of a low-temperature superheater 6 through a low-temperature superheater feed pipe 5, a first electric control valve 7, a first main control valve 8 and a second electric control valve 9 are sequentially arranged on the steam drum feed pipe 3 along the medium flow direction, a steam drum feed by-pass pipe 11 with a first bypass valve 10 is connected in parallel on the steam drum feed pipe 3, one end of the steam drum feed by-pass pipe 11 is connected with the steam drum feed pipe 3 in front of the first electric control valve 7, the other end of the steam drum feed pipe is connected with the steam drum feed pipe 3 behind the second electric control valve 9, a third electric control valve 12, a second main control valve 13 and a fourth electric control valve 14 are sequentially arranged on the low-temperature superheater feed pipe 5 along the medium flow direction, the other end of the low-temperature superheater feed pipe 5 is connected with the low-temperature superheater feed pipe 16 in parallel with the low-temperature superheater feed pipe 16, and the other end of the fourth electric control valve 14 is connected with the low-temperature superheater feed pipe 16 in front of the low-temperature superheater feed pipe 5; in the embodiment, the water supply pipe 17 is communicated with the drum water supply pipe 3 behind the second electric regulating valve 9, the water supply exhaust valve 18 is arranged on the water supply exhaust pipe 17, and the air in the drum water supply pipe 3 can be timely discharged through the water supply exhaust pipe and the water supply exhaust valve, so that the running stability and the use safety of the system are improved; in the embodiment, the fifth electric control valve 19, the manual control valve 20 and the first flowmeter 21 are arranged on the water supply main pipe 1, the second flowmeter 22 is arranged on the drum water supply pipe 3 behind the second electric control valve 9, and the third flowmeter 23 is arranged on the low-temperature superheater water supply pipe 5 behind the fourth electric control valve 14, so that the flow rate on each pipeline can be more intuitively known, a worker can find abnormal conditions in time, and the system can be adjusted in time; in the embodiment, the sixth electric regulating valve 27 is arranged at the inlet and the outlet of each boiler feed pump 2, so that on-line maintenance of the fault boiler feed pump can be realized on the premise of ensuring smooth production of the gas power generation boiler;
the working principle of the invention is as follows:
The boiler feed pump 2 pumps hot water in a condenser 24 of the condensing steam turbine into the feed water header pipe 1, and then the hot water is distributed to the steam drum feed water pipe 3 and the low-temperature superheater feed water pipe 5 sequentially through the fifth electric control valve 19, the manual control valve 20 and the first flowmeter 21, and then the hot water entering the steam drum feed water pipe 3 sequentially enters the steam drum 4 of the gas power generation boiler 25 from the feed water inlet of the steam drum 4 through the first electric control valve 7, the first main control valve 8, the second electric control valve 9 and the second flowmeter 22; the hot water entering the low-temperature superheater water supply pipe 5 sequentially enters the low-temperature superheater 6 of the gas power generation boiler 25 from the water inlet of the low-temperature superheater 6 through the third electric regulating valve 12, the second main regulating valve 13, the fourth electric regulating valve 14 and the third flowmeter 23; the gas power generation boiler 25 discharges hot water in the steam drum 4 into a steam turbine 26 of a condensing steam turbine after forming superheated steam, and the condensing steam turbine then introduces the steam after working into the condenser 24 for recycling; in the working process of the gas power generation boiler 25, the water supply exhaust valve 18 needs to be opened at regular time, and the gas in the steam drum water supply pipe 3 is timely discharged through the water supply exhaust valve 18, so that the running stability and the use safety of the steam drum water supply pipe 3 are ensured;
When the first main regulating valve 8 breaks down and needs to be maintained, the first electric regulating valve 7 and the second electric regulating valve 9 are closed, and the first bypass valve 10 is opened at the same time, at the moment, hot water distributed to the drum water supply pipe 3 by the water supply main pipe 1 can enter the drum through the drum water supply bypass pipe 11 and can not pass through the first main regulating valve 8 any more, so that the first main regulating valve 8 can be maintained on line, the safety and the smoothness of a gas power generation boiler production system can not be influenced by the first main regulating valve 8, and the production efficiency is ensured; similarly, when the second main regulating valve 13 fails and needs to be maintained, the third electric regulating valve 12 and the fourth electric regulating valve 14 are closed, and the second bypass valve 15 is opened at the same time, at this time, hot water distributed to the low-temperature superheater water supply pipe 5 by the water supply header pipe 1 enters the low-temperature superheater 6 through the low-temperature superheater water supply bypass pipe 16 and does not pass through the second main regulating valve 13 any more, so that the second main regulating valve 13 can be maintained on line, the safety and the smoothness of a production system of the gas power generation boiler are not affected by the failure of the second main regulating valve 13, and the production efficiency is ensured; similarly, when one of the boiler feed water pumps 2 fails, the sixth electric control valve 27 at the inlet and outlet of the failed boiler feed water pump 2 is closed, and the other normal boiler feed water pump 2 is started, and the sixth electric control valve 27 at the inlet and outlet of the normal boiler feed water pump 2 is opened, at this time, the maintenance of the failed boiler feed water pump can be performed online.
The invention has the advantages that: the operation stability and the use safety are high, the regulating valve and the boiler feed pump can be maintained on line, the safety and the smoothness of a gas power generation boiler production system are ensured, and the production efficiency is improved.
Claims (1)
1. A gas power boiler feed water system comprising: the water supply main pipe is characterized in that: at least two boiler feed pumps are connected in parallel on a feed water main pipe, an outlet of the feed water main pipe is communicated with a feed water mouth of a steam drum through a steam drum feed water pipe, and is simultaneously communicated with a water inlet of a low-temperature superheater through a low-temperature superheater feed water pipe, a first electric regulating valve, a first main regulating valve and a second electric regulating valve are sequentially arranged on the steam drum feed water pipe along the medium flowing direction, a steam drum feed water bypass pipe with a first bypass valve is connected in parallel on the steam drum feed water pipe, one side pipe end of the steam drum feed water bypass pipe is connected with the steam drum feed water pipe in front of the first electric regulating valve, the other side pipe end is connected with the steam drum feed water pipe behind the second electric regulating valve, a third electric regulating valve, a second main regulating valve and a fourth electric regulating valve are sequentially arranged on the low-temperature superheater water supply pipe along the medium flowing direction, a low-temperature superheater water supply bypass pipe with a second bypass valve is connected in parallel on the low-temperature superheater water supply pipe, one pipe end of the low-temperature superheater water supply bypass pipe is connected with the low-temperature superheater water supply pipe in front of the third electric regulating valve, and the other pipe end of the low-temperature superheater water supply bypass pipe is connected with the low-temperature superheater water supply pipe behind the fourth electric regulating valve; a water supply exhaust pipe is communicated with a steam drum water supply pipe behind the second electric regulating valve, and a water supply exhaust valve is arranged on the water supply exhaust pipe; a fifth electric regulating valve, a manual regulating valve and a flowmeter are arranged on the water supply main pipe; a flowmeter is arranged on the steam drum water supply pipe behind the second electric regulating valve; a flowmeter is arranged on the low-temperature superheater water supply pipe behind the fourth electric regulating valve; and a sixth electric regulating valve is arranged at the inlet and the outlet of each boiler water supply pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451558.6A CN109442382B (en) | 2018-11-30 | 2018-11-30 | Water supply system of gas power generation boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451558.6A CN109442382B (en) | 2018-11-30 | 2018-11-30 | Water supply system of gas power generation boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109442382A CN109442382A (en) | 2019-03-08 |
| CN109442382B true CN109442382B (en) | 2024-05-14 |
Family
ID=65554505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811451558.6A Active CN109442382B (en) | 2018-11-30 | 2018-11-30 | Water supply system of gas power generation boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109442382B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110201786A (en) * | 2019-05-30 | 2019-09-06 | 安徽铜冠（庐江）矿业有限公司 | A kind of grinding machine adds water system and its application method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202768378U (en) * | 2012-09-12 | 2013-03-06 | 中国神华能源股份有限公司 | Feed pump warming-up system |
| CN203605211U (en) * | 2013-10-28 | 2014-05-21 | 中国能源建设集团广东省电力设计研究院 | Water feeding system of boiler |
| CN105782948A (en) * | 2016-04-14 | 2016-07-20 | 长安益阳发电有限公司 | Method for starting thermal power generating unit under recycling fault of turbine driven feed water pumps |
| CN205447710U (en) * | 2016-03-14 | 2016-08-10 | 西安热工研究院有限公司 | System for utilize steam turbine bypass steam heating boiler feed water |
| CN205655277U (en) * | 2016-05-16 | 2016-10-19 | 中国华电科工集团有限公司 | Water system in small -size power plant boiler start -up |
| CN207674419U (en) * | 2017-12-26 | 2018-07-31 | 广州发展集团股份有限公司 | A kind of boiler feedwater pipeline optimization system |
| CN209470194U (en) * | 2018-11-30 | 2019-10-08 | 联峰钢铁（张家港）有限公司 | A kind of coal gas electricity generation boiler water supply system |
-
2018
- 2018-11-30 CN CN201811451558.6A patent/CN109442382B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202768378U (en) * | 2012-09-12 | 2013-03-06 | 中国神华能源股份有限公司 | Feed pump warming-up system |
| CN203605211U (en) * | 2013-10-28 | 2014-05-21 | 中国能源建设集团广东省电力设计研究院 | Water feeding system of boiler |
| CN205447710U (en) * | 2016-03-14 | 2016-08-10 | 西安热工研究院有限公司 | System for utilize steam turbine bypass steam heating boiler feed water |
| CN105782948A (en) * | 2016-04-14 | 2016-07-20 | 长安益阳发电有限公司 | Method for starting thermal power generating unit under recycling fault of turbine driven feed water pumps |
| CN205655277U (en) * | 2016-05-16 | 2016-10-19 | 中国华电科工集团有限公司 | Water system in small -size power plant boiler start -up |
| CN207674419U (en) * | 2017-12-26 | 2018-07-31 | 广州发展集团股份有限公司 | A kind of boiler feedwater pipeline optimization system |
| CN209470194U (en) * | 2018-11-30 | 2019-10-08 | 联峰钢铁（张家港）有限公司 | A kind of coal gas electricity generation boiler water supply system |
Non-Patent Citations (1)
| Title |
|---|
| 汪卫东.《热力发电厂》.北京：中国电力出版社,2012,133-142. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109442382A (en) | 2019-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105973017B (en) | Ring cold machine waste gas residual heat utilization system | |
| CN201074826Y (en) | Flue gas/oil-fired boiler energy conservation equipment | |
| CN106640235A (en) | Subcritical direct air cooling unit cold starting method | |
| CN107270383A (en) | A kind of thermoelectricity peak load regulation heating system | |
| CN202954856U (en) | System for improving afterheat power generation running efficiency | |
| CN206361703U (en) | A kind of SCR inlet flue gas temperature raising system for meeting full load denitration | |
| CN206320728U (en) | Attemperation water system of boiler superheater | |
| CN109442382B (en) | Water supply system of gas power generation boiler | |
| CN114592928A (en) | BEST small-machine steam inlet and outlet system and steam outlet pressure control operation method thereof | |
| CN209470194U (en) | A kind of coal gas electricity generation boiler water supply system | |
| CN210485839U (en) | Heat supply system | |
| CN113154356A (en) | High-temperature steam composite thermodynamic system and utilization method thereof | |
| CN112178620A (en) | Condensed water energy utilization device of high-pressure heater of thermal power plant | |
| CN217978755U (en) | Gas supply system of supercritical gas boiler | |
| CN108487955B (en) | Coal gas efficiency-increasing utilization system based on steam parameter promotion | |
| CN217604068U (en) | Adjacent machine heating thermal state flushing system of boiler | |
| CN106765039A (en) | A kind of SCR inlet flue gas water side temperature raising system and method | |
| CN104132326B (en) | A kind of CFB boiler emergency water compensating system without emergency water compensating case | |
| CN203810382U (en) | Switchable secondary reheat steam surface type desuperheater system of ultra-supercritical unit | |
| CN103939886B (en) | Extra-supercritical unit switchable type double reheat steam convection-type desuperheater system | |
| RU2528190C2 (en) | Steam gas plant | |
| CN214223075U (en) | Novel desuperheating water system of million tower boiler superheater and reheater | |
| CN211273584U (en) | Low-temperature recovery evaporator system for sulfuric acid production | |
| CN208473941U (en) | A kind of heat supply cooling system | |
| CN103438722B (en) | Combined type low temperature exhaust heat power generation system in dry method cement production lines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |