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CN203395584U - Nitrogen purging system for large medium-low calorific value synthesis-gas gas turbine for integrated gasification combined cycle (IGCC) power station - Google Patents

Nitrogen purging system for large medium-low calorific value synthesis-gas gas turbine for integrated gasification combined cycle (IGCC) power station Download PDF

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Publication number
CN203395584U
CN203395584U CN201320491060.9U CN201320491060U CN203395584U CN 203395584 U CN203395584 U CN 203395584U CN 201320491060 U CN201320491060 U CN 201320491060U CN 203395584 U CN203395584 U CN 203395584U
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China
Prior art keywords
medium
pressure nitrogen
valve
purging
storage tank
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Expired - Lifetime
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CN201320491060.9U
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Chinese (zh)
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韩子俊
毕建惠
安永尧
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Northwest Electric Power Design Institute of China Power Engineering Consulting Group
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Northwest Electric Power Design Institute of China Power Engineering Consulting Group
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]

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Abstract

The utility model discloses a nitrogen purging system for a large medium-low calorific value synthesis-gas gas turbine for an integrated gasification combined cycle (IGCC) power station. The nitrogen purging system comprises a high-pressure nitrogen storage tank system and a medium-pressure nitrogen storage tank system, one end of a high-pressure nitrogen storage tank is connected with a nitrogen outlet of an air separation device through a high-pressure nitrogen storage tank inlet pipe, and the other end of the high-pressure nitrogen storage tank is connected with a purging inlet of the medium-low calorific value synthesis-gas gas turbine through a pressure reducing valve front pipe, a pressure reducing valve and a pressure reducing valve rear pipe which are connected in sequence. A medium-pressure nitrogen storage tank is communicated with the purging inlet of the medium-low calorific value synthesis-gas gas turbine. In a few minutes before the pressure reducing valve is opened, gas turbine purging nitrogen is provided through the medium-pressure nitrogen storage tank system until the pressure reducing valve of the high-pressure nitrogen storage tank system is completely opened, the continuous purging nitrogen is provided, and the nitrogen is supplemented to the medium-pressure nitrogen storage tank; the precision requirements of the large medium-low calorific value synthesis-gas gas turbine for purging starting and stopping time, purging pressure and purging flow are met, and the medium-pressure nitrogen storage tank system has pressure stabilization effect in the whole system.

Description

Large-scale medium-Btu syngas combustion machine nitrogen blowing system for IGCC power station
Technical field:
The utility model relates to IGCC(integral coal gasification-combustion and steam combined cycle) technical field, particularly a kind of large-scale medium-Btu syngas combustion machine nitrogen blowing system for IGCC power station.
Background technique:
IGCC(integral coal gasification-combustion and steam combined cycle) generation technology is a kind of Clean Coal Power Generating Technologies of gasification and the organic integration of combustion gas-steam combined cycle system.Coal produces synthetic gas through gasification, then adopts ripe chemical industry to purify and recovery process processing synthetic gas, and the synthetic gas after processing drives gas turbine power generation, the steam driven steam turbine generation that recycling high-temperature exhaust air produces in exhaust heat boiler.
IGCC mainly comprises following process system: gasification system, synthetic gas cleaning system, air separation system, combined cycle system.
Air separation system is to adopt deep cooling principle that airborne nitrogen and oxygen are separated, nitrogen after supercharging for the pressurization of coal dust and the protection of conveying, pressurized container and system or purging etc.
The combined cycle system that is applicable to IGCC power station adopts large-scale middle low-calorific-value gas turbine.Each firing chamber of middle low-calorific-value gas turbine is all furnished with double fuel (synthetic gas, Diesel oil) mixing burner, needs synthetic gas combustion machine intake duct, mixer and firing chamber to purge before startup.
Large-scale middle low-calorific-value gas turbine purge system all has strict requirement to inlet valve opening/closing time, purge flow rate, purging pressure, and the conventional purge system for rock gas combustion machine can not meet the demands.
Model utility content:
The purpose of this utility model is to provide large-scale medium-Btu syngas combustion machine nitrogen blowing system for a kind of IGCC power station, to meet large-scale medium-Btu syngas combustion machine to purging the requirement of entrance valve opening and closing time, purge flow rate, purging pressure.
To achieve these goals, the utility model adopts following technological scheme:
Large-scale medium-Btu syngas combustion machine nitrogen blowing system for IGCC power station, comprises high pressure nitrogen storage tank system, two subtense angles of medium pressure nitrogen gas-reservoir can system; Described high pressure nitrogen storage tank system comprises high pressure nitrogen basin, the first separating valve, the second separating valve, high pressure nitrogen basin inlet pipe, the 3rd separating valve, reduction valve, the 4th separating valve and safety check; One end of high pressure nitrogen basin connects the nitrogen outlet of air-separating plant by high pressure nitrogen basin inlet pipe, high pressure nitrogen basin inlet pipe is provided with the first separating valve and the second separating valve; The high pressure nitrogen basin the other end by the reduction valve preceding pipeline, reduction valve and the reduction valve that connect successively after pipeline be connected the purging entrance of medium-Btu syngas combustion machine; Reduction valve preceding pipeline is provided with the 3rd separating valve, and after reduction valve, pipeline is provided with the 4th separating valve and safety check; Medium pressure nitrogen gas-reservoir can system comprises medium pressure nitrogen gas-reservoir tank; Medium pressure nitrogen gas-reservoir tank is communicated with the purging entrance of medium-Btu syngas combustion machine by medium pressure nitrogen gas outlet conduit.
The utility model further improves and is: high pressure nitrogen basin, medium pressure nitrogen gas-reservoir tank are horizontal pressure vessel or vertical pressure vessel.
The utility model further improves and is: reduction valve is connected with PI controller, and described PI controller compares for gathering pressure and the setting value of the purging inlet valve of medium-Btu syngas combustion machine, controls the flow of reduction valve.
The utility model further improves and is: the purging inlet valve of medium-Btu syngas combustion machine is solenoid valve, hydraulic operated valve or pneumatic valve.
The utility model further improves and is: medium pressure nitrogen gas-reservoir tank connects pipeline after reduction valve by two medium pressure nitrogen gas outlet conduits, and after two medium pressure nitrogen gas outlet conduits and reduction valve, the connection mouth of pipeline fires between the purging entrance of machine at the 4th separating valve and medium-Btu syngas.
The utility model further improves and is: on high pressure nitrogen basin and medium pressure nitrogen gas-reservoir tank, be equipped with safety valve.
The utility model further improves and is: the purging pressure of medium pressure nitrogen gas-reservoir tank working pressure and medium-Btu syngas combustion machine matches.
The utility model further improves and is: high pressure nitrogen basin, medium pressure nitrogen gas-reservoir tank are equipped with tank body blowdown valve.
The utility model adopts PI controller to realize closed loop, the quick adjustment of controlled parameter.
With respect to prior art, the utility model advantage is: large-scale medium-Btu syngas combustion machine nitrogen blowing system for a kind of IGCC of the utility model power station, the purging inlet valve of medium-Btu syngas combustion machine can be solenoid valve, hydraulic operated valve, and its opening time can be much smaller than the actuation time of reduction valve; In several seconds before reduction valve is opened, by medium pressure nitrogen gas-reservoir can system, provide combustion machine purging nitrogen, met the requirement of large-scale medium-Btu syngas combustion machine to nitrogen blowing opening/closing time; Until high pressure nitrogen storage tank system reduction valve is opened completely, provide and continue purging nitrogen, and supplement nitrogen to medium pressure nitrogen gas-reservoir tank; Met large-scale medium-Btu syngas combustion machine to purging the accurate requirement of opening and closing time, purging pressure, purge flow rate; Medium pressure nitrogen gas-reservoir can system has played pressure stabilization function in whole system.
Adopt PI controller, realize the quick high-quality adjusting to systematic parameter, can adopt close-loop control mode to realize the quick adjustment of controlled parameter, guarantee to purge pressure stability in allowed band.
Accompanying drawing explanation:
Fig. 1 is the structural representation of large-scale medium-Btu syngas combustion machine nitrogen blowing system for the utility model IGCC power station;
In figure: 1, air-separating plant; 2, high pressure nitrogen basin; 3, medium pressure nitrogen gas-reservoir tank; 4, medium-Btu syngas combustion machine; 5, the first separating valve; 6, the second separating valve; 7, the 3rd separating valve; 8, reduction valve; 9, the 4th separating valve; 10, safety check; 11, solenoid valve; 12, safety valve; 13, separating valve; 14, separating valve; 15, safety valve; 16, separating valve; 17, separating valve; 100, high pressure nitrogen basin inlet pipe; 200 high pressure nitrogen basin outlet reduction valve preceding pipelines; 300, pipeline after reduction valve; 400, medium pressure nitrogen gas outlet conduit.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Shown in Figure 1, large-scale medium-Btu syngas combustion machine nitrogen blowing system for a kind of IGCC of the utility model power station, comprises high pressure nitrogen storage tank system and two subtense angles of medium pressure nitrogen gas-reservoir can system.
High pressure nitrogen storage tank system comprises high pressure nitrogen basin 2, the first separating valve 5, the second separating valve 6, high pressure nitrogen basin inlet pipe 100, the 3rd separating valve 7, reduction valve 8, the 4th separating valve 9, safety check 10.
One end of high pressure nitrogen basin 2 connects the nitrogen outlet of air-separating plant 1 by high pressure nitrogen basin inlet pipe 100, high pressure nitrogen basin inlet pipe 100 is provided with the first separating valve 5 and the second separating valve 6; The other end of high pressure nitrogen basin 2 is connected the purging entrance of medium-Btu syngas combustion machine 4 by reduction valve preceding pipeline 200, reduction valve 8 and the pipeline after reduction valve 300 connecting successively; Reduction valve preceding pipeline 200 is provided with the 3rd separating valve 7, and after reduction valve, pipeline 300 is provided with the 4th separating valve 9 and safety check 10.
Medium pressure nitrogen gas-reservoir can system comprises medium pressure nitrogen gas-reservoir tank 3 and corresponding pipeline thereof.Medium pressure nitrogen gas-reservoir tank 3 connects pipeline 300 after reduction valve by two medium pressure nitrogen gas outlet conduits 400, and after two medium pressure nitrogen gas outlet conduits 400 and reduction valve, the connection mouth of pipeline 300 fires between the purging entrance of machine 4 at the 4th separating valve 9 and medium-Btu syngas.
High pressure nitrogen basin 2, medium pressure nitrogen gas-reservoir tank 3 are horizontal pressure vessel or vertical pressure vessel.
When the purging inlet valve 11 of medium-Btu syngas combustion machine 4 is opened, reduction valve 8 is not action also, medium pressure nitrogen gas in medium pressure nitrogen gas-reservoir tank 3 provides combustion machine purging nitrogen by two medium pressure nitrogen gas outlet conduits 400, the purging pressure of medium pressure nitrogen gas-reservoir tank 3 working pressures and medium-Btu syngas combustion machine 4 matches, met the requirement of large-scale medium-Btu syngas combustion machine to nitrogen blowing opening/closing time, until high pressure nitrogen storage tank system reduction valve 8 is opened completely.The purging inlet valve of medium-Btu syngas combustion machine can be solenoid valve, hydraulic operated valve, and its opening time can be much smaller than the actuation time of reduction valve.In several seconds before reduction valve is opened, by medium pressure nitrogen gas-reservoir can system, provide combustion machine purging nitrogen, until high pressure nitrogen storage tank system reduction valve is opened completely; Medium pressure nitrogen gas-reservoir can system has played pressure stabilization function in whole system.
After reduction valve 8 actions are opened, high pressure nitrogen basin 2 is provided and is continued purging nitrogen by pipeline after reduction valve 300, and supplements nitrogen to medium pressure nitrogen gas-reservoir tank 3.
Pressure and setting value that PI controller gathers purging valve 11 outlets of medium-Btu syngas combustion machine 4 compare, and control the flow of reduction valve 8, and then meet the requirement that medium-Btu syngas fires 4 pairs of purge flow rates of machine, purges pressure.Adopt PI controller can realize closed loop, the quick adjustment of controlled parameter.
On high pressure nitrogen basin 2 and medium pressure nitrogen gas-reservoir tank 3, be respectively equipped with safety valve 12,15.The bottom of high pressure nitrogen basin 2 is provided with blow-off line, and the blow-off line of high pressure nitrogen basin 2 is provided with separating valve 13,14.The bottom of medium pressure nitrogen gas-reservoir tank 3 is provided with blow-off line, and the blow-off line of medium pressure nitrogen gas-reservoir tank 3 is provided with separating valve 16,17.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model; can not assert that embodiment of the present utility model only limits to this; for the utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; can also make some simple deduction or replace, all should be considered as belonging to the utility model and determine scope of patent protection by submitted to claims.

Claims (7)

  1. Large-scale medium-Btu syngas combustion machine nitrogen blowing system for 1.IGCC power station, is characterized in that: comprise high pressure nitrogen storage tank system, two subtense angles of medium pressure nitrogen gas-reservoir can system;
    Described high pressure nitrogen storage tank system comprises high pressure nitrogen basin (2), the first separating valve (5), the second separating valve (6), high pressure nitrogen basin inlet pipe (100), the 3rd separating valve (7), reduction valve (8), the 4th separating valve (9) and safety check (10);
    One end of high pressure nitrogen basin (2) connects the nitrogen outlet of air-separating plant (1) by high pressure nitrogen basin inlet pipe (100), high pressure nitrogen basin inlet pipe (100) is provided with the first separating valve (5) and the second separating valve (6); High pressure nitrogen basin (2) the other end is connected the purging entrance of medium-Btu syngas combustion machine (4) by reduction valve preceding pipeline (200), reduction valve (8) and the pipeline after reduction valve (300) connecting successively; Reduction valve preceding pipeline (200) is provided with the 3rd separating valve (7), and pipeline after reduction valve (300) is provided with the 4th separating valve (9) and safety check (10);
    Medium pressure nitrogen gas-reservoir can system comprises medium pressure nitrogen gas-reservoir tank (3); Medium pressure nitrogen gas-reservoir tank (3) is communicated with the purging entrance of medium-Btu syngas combustion machine (4) by medium pressure nitrogen gas outlet conduit (400).
  2. 2. large-scale medium-Btu syngas combustion machine nitrogen blowing system for IGCC according to claim 1 power station, is characterized in that: high pressure nitrogen basin (2), medium pressure nitrogen gas-reservoir tank (3) are horizontal pressure vessel or vertical pressure vessel.
  3. 3. for IGCC according to claim 1 power station, large-scale medium-Btu syngas fires machine nitrogen blowing system, it is characterized in that: reduction valve (8) is connected with PI controller, pressure and setting value that described PI controller is used for gathering the purging inlet valve (11) of medium-Btu syngas combustion machine (4) compare, the flow of control reduction valve (8).
  4. 4. large-scale medium-Btu syngas combustion machine nitrogen blowing system for IGCC according to claim 1 power station, is characterized in that: the purging inlet valve (11) of medium-Btu syngas combustion machine (4) is solenoid valve, hydraulic operated valve or pneumatic valve.
  5. 5. for IGCC according to claim 1 power station, large-scale medium-Btu syngas fires machine nitrogen blowing system, it is characterized in that: medium pressure nitrogen gas-reservoir tank (3) connects pipeline (300) after reduction valve by two medium pressure nitrogen gas outlet conduits (400), after two medium pressure nitrogen gas outlet conduits (400) and reduction valve, the connection mouth of pipeline (300) is positioned at the 4th separating valve (9) and medium-Btu syngas fires between the purging entrance of machine (4).
  6. 6. large-scale medium-Btu syngas combustion machine nitrogen blowing system for IGCC according to claim 1 power station, is characterized in that: on high pressure nitrogen basin (2) and medium pressure nitrogen gas-reservoir tank (3), be equipped with safety valve.
  7. 7. large-scale medium-Btu syngas combustion machine nitrogen blowing system for IGCC according to claim 1 power station, is characterized in that: the purging pressure of medium pressure nitrogen gas-reservoir tank (3) working pressure and medium-Btu syngas combustion machine (4) matches.
CN201320491060.9U 2013-08-12 2013-08-12 Nitrogen purging system for large medium-low calorific value synthesis-gas gas turbine for integrated gasification combined cycle (IGCC) power station Expired - Lifetime CN203395584U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103742270A (en) * 2014-01-28 2014-04-23 重庆中节能三峰能源有限公司 Purging pipeline monitoring method of combustor
CN107859998A (en) * 2017-12-18 2018-03-30 中国科学技术大学先进技术研究院 A kind of mixed combustible gas body burner experimental rig

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103742270A (en) * 2014-01-28 2014-04-23 重庆中节能三峰能源有限公司 Purging pipeline monitoring method of combustor
CN107859998A (en) * 2017-12-18 2018-03-30 中国科学技术大学先进技术研究院 A kind of mixed combustible gas body burner experimental rig
CN107859998B (en) * 2017-12-18 2023-10-20 中国科学技术大学先进技术研究院 Application of mixed combustible gas burner test device in real fire extinguishing training

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Owner name: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE OF CHINA

Free format text: FORMER NAME: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE, CHINA POWER ENGINEERING CONSULTING GROUP CORPORATION

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Address after: 22 No. 710075, unity South Road, hi tech Industrial Development Zone, Shaanxi, Xi'an

Patentee after: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group

Address before: 710075 Xi'an province high tech Development Zone, unity South Road, No. 22, No.

Patentee before: NORTHWEST ELECTRIC POWER DESIGN INST. OF CHINA POWER ENGINEERING CONSULTING Group

CX01 Expiry of patent term
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Granted publication date: 20140115