CN101893257B - System for ignition and stable combustion of pulverized coal fired boiler by using natural gas - Google Patents
System for ignition and stable combustion of pulverized coal fired boiler by using natural gas Download PDFInfo
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- CN101893257B CN101893257B CN2010102446926A CN201010244692A CN101893257B CN 101893257 B CN101893257 B CN 101893257B CN 2010102446926 A CN2010102446926 A CN 2010102446926A CN 201010244692 A CN201010244692 A CN 201010244692A CN 101893257 B CN101893257 B CN 101893257B
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Abstract
The invention belongs to the field of auxiliary boilers, and in particular relates to a system for ignition and stable combustion of a pulverized coal fired boiler by using natural gas. The system for ignition and stable combustion of the pulverized coal fired boiler by using the natural gas comprises a boiler ignition system communicated with a natural gas supply pipe, and is characterized in that: a pressure regulating station is arranged between the natural gas supply pipe and the boiler ignition system, and the natural gas supply pipe in front of the pressure regulating station is provided with a main gas source shut-off valve; the pressure regulating station is formed by orderly connecting a gas separating cylinder, a multichannel parallel pressure regulating pipeline and a gas collecting cylinder; a main pipe extends out of the gas collecting cylinder and enters a boiler house; and a pipeline is led out from the main pipe and is communicated with natural gas guns at pulverized coal burners. The system has the advantages of solving the problem of oil gun blockage during ignition by adopting fuel oil, greatly reducing ignition and stable combustion cost of the boiler, improving the stability of the ignition of the boiler, avoiding additional stream for fuel atomization, improving economy and saving installation cost by using part of the original fuel pipeline.
Description
(1) technical field
The invention belongs to the boiler accessory machinery field, particularly a kind of use natural gas carries out pulverized coal boiler ignition and steady combustion system.
(2) background technology
The small oil gun firing technique is the fuel-economizing firing technique that grows up this year, is widely used in the igniting and steady combustion of generating plant pulverized coal boiler, also is the tiny-oil ignition technology, and the characteristics of low oil consumption are arranged compared to conventional grease gun igniting.But also there are problems in the small oil gun igniting, is prone to stop up like the oil gun mouth, and igniting is prone to failure etc.
Along with rise of the oil price, use the fuel ignition cost to improve, in order further to reduce the ignition of the boiler cost, employing calorific value natural gas higher, relative low price carries out ignition of the boiler and steady combustion is necessary.
(3) summary of the invention
The present invention provides a kind of use natural gas that improves Ignition Stability, reduction igniting cost to carry out pulverized coal boiler ignition and surely fire system in order to remedy the deficiency of prior art.
The present invention realizes through following technical scheme:
A kind of use natural gas carries out pulverized coal boiler ignition and steady combustion system; Comprise the ignition of the boiler system that is communicated with the natural gas supply pipe; It is characterized in that: be provided with voltage regulating station between natural gas supply pipe and the ignition of the boiler system, on the natural gas supply pipe before the voltage regulating station, the total stop valve of source of the gas be installed; Voltage regulating station is formed by connecting in sub-cylinder, multidiameter delay pressure regulation pipeline and gas collection cylinder successively, stretches out female pipe on the gas collection cylinder and gets into the boiler room, draws the locational natural gas spraying gun of each coal burner of pipeline connection on female pipe.
The present invention introduces natural gas from industrial pipe network, carry out sending into the ignition of the boiler system after pressure regulation and the voltage stabilizing through voltage regulating station.Use natural gas as the fuel that substitutes fuel oil, pressurized natural gas is sent into natural gas spraying gun replace small oil gun to light a fire and steady combustion.
More excellent scheme of the present invention is:
Regulate for guaranteeing that gas discharge is convenient after the pressure regulation; And the assurance security, except that adopting multidiameter delay pressure regulation pipeline, parallelly connected bypass pipe on parallel pressure regulation pipeline; All be provided with blow-off pipe on sub-cylinder and the gas collection cylinder, the other end that the gas collection cylinder is equipped with safety valve and safety valve is connected with exhaust stack.
The mother of said entering boiler room manages by flowing to the low pressure limit switch be provided with exhaust stack, self-contained pressure regulator, parallel connection successively and upper pressure limit switch, thermometer, safety valve, and connects exhaust stack at safety valve one end.
Be provided with hand off valve, flowmeter, flow control valve, Pressure gauge, safety cut-off magnetic valve successively by flowing to before the said spray gun.
The pipe laying that mother's pipe between said voltage regulating station and the boiler room has 10～15m is imported the boiler room underground into to prevent noise.
Said system is provided with and independently purges pipeline, purges pipeline and links to each other with main combustible pipe road diverse location, near the pipeline tie point, exhaust stack is set, and the interior combustion gas of pipe can in time be diffused when purging.
Said spray gun is installed in airduct, and is identical with former small oil gun position.
The oil gun blockage problem that the present invention has taken place when having avoided adopting fuel ignition greatly reduces ignition of the boiler and steady combustion cost, has improved the stability of ignition of the boiler; Need not carry out fuel-oil atmozation with extra steam; Improve economy, can use the original fuel pipe of part, practiced thrift installation cost.
(4) description of drawings
Below in conjunction with accompanying drawing the present invention is further described.
Accompanying drawing is a schematic flow sheet of the present invention.
Among the figure, 1 safety valve, 2 thermometers, 3 low pressure limit switches, 4 upper pressure limit switches, 5 hand sluice valves, 6 exhaust stacks; 7 self-contained pressure regulators, 8 hand off valves, 9 flowmeters, 10 flow control valves, 11 Pressure gauges, 12 safety cut-off magnetic valves; 13 stop valves, 14 pressure regulators, 15 filters, 16 bypass pipes, 17 blow-off pipes, 18 diffuse valve; The total stop valve of 18 sources of the gas, 20 sub-cylinders, 21 gas collection cylinders, 22 natural gas supply pipes, 23 voltage regulating stations, 24 purge pipeline.
(5) specific embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.This embodiment is following:
Introduce combustion gas by natural gas supply pipe 22 and behind the total stop valve 19 of source of the gas, get into voltage regulating station 23 (among the figure in the square frame); For gas discharge after guaranteeing pressure regulation satisfies the igniting demand; Adopt multidiameter delay pressure regulation pipeline; And on parallel pressure regulation pipeline parallelly connected bypass pipe 16, parallel pressure regulation pipeline is parallelly connected with 21 realizations of gas collection cylinder through sub-cylinder 20 with bypass pipe 16.All be provided with blow-off pipe 17 on sub-cylinder 20 and the gas collection cylinder 21, the other end that safety valve 1 and safety valve 1 are installed on the gas collection cylinder 21 is connected with exhaust stack 6.Natural gas is sent into the boiler room through mother's pipe after pressure regulation; Between voltage regulating station and boiler room, need have the pipe laying of the female pipe of 10～15m underground to prevent that noise from importing the boiler room into, get into the boiler room stepmother and manage by flowing to and establish exhaust stack 6, self-contained pressure regulator 7, parallelly connected low pressure limit switch 3 and upper pressure limit switch 4, thermometer 2, safety valve 1 successively and be connected exhaust stack 6 at safety valve 1 one ends.Draw the natural gas spraying gun that pipeline is sent into natural gas each coal burner position respectively by mother's pipe; All be provided with hand off valve 8, flowmeter 9, flow control valve 10, Pressure gauge 11, safety cut-off magnetic valve 12 successively by flow direction before each spray gun, send into natural gas spraying gun at last.
The present invention is provided with and purges pipeline 24; Should purge constantly at start stop system; Purging can use air also can use gases such as nitrogen, carbon dioxide; Purge female pipe and tell a plurality of arms and link to each other with main combustible pipe road diverse location, be provided with near the pipeline tie point exhaust stack 6 make inside the Pass combustion gas can in time diffuse during at purging.
Adopt natural gas spraying gun to be installed in airduct, with former small oil gun position.When adopting natural gas fired, the igniting initial stage is because water-cooling wall water-cooled effect should adopt theory to need 1.5～2 times of gas quantity to light a fire.Need to guarantee that the natural gas spraying gun outlet pressure prevents that greater than a blast breeze airflow from flowing backwards, need enough pressure assurance fuel gas flow rigidity in addition and guarantee that flow velocity prevents tempering greater than flame propagation velocity.
Claims (6)
1. one kind is used natural gas to carry out pulverized coal boiler ignition and steady combustion system; Comprise the ignition of the boiler system that is communicated with natural gas supply pipe (22); It is characterized in that: be provided with voltage regulating station (23) between natural gas supply pipe and the ignition of the boiler system, on voltage regulating station (23) natural gas supply pipe (22) before, the total stop valve of source of the gas (19) be installed; Voltage regulating station (23) is formed by connecting in sub-cylinder (20), multidiameter delay pressure regulation pipeline and gas collection cylinder (21) successively, stretches out female pipe on the gas collection cylinder (21) and gets into the boiler room, draws the locational natural gas spraying gun of each coal burner of pipeline connection on female pipe; Be provided with hand off valve (8), flowmeter (9), flow control valve (10), Pressure gauge (11), safety cut-off magnetic valve (12) successively by flowing to before the said spray gun.
2. use natural gas according to claim 1 carries out pulverized coal boiler ignition and steady combustion system; It is characterized in that: be parallel with bypass pipe (16) on the said parallel pressure regulation pipeline; All be provided with blow-off pipe (17) on sub-cylinder (20) and the gas collection cylinder (21), the other end that gas collection cylinder (21) is equipped with safety valve (1) and safety valve (1) is connected with exhaust stack (6).
3. use natural gas according to claim 1 and 2 carries out pulverized coal boiler ignition and steady combustion system; It is characterized in that: the mother of said entering boiler room manages the low pressure limit switch (3) and upper pressure limit switch (4), thermometer (2), safety valve (1) be provided with exhaust stack (6), self-contained pressure regulator (7), parallel connection successively by flowing to, and at safety valve (1) one end connection exhaust stack (6).
4. use natural gas according to claim 1 and 2 carries out pulverized coal boiler ignition and steady combustion system, it is characterized in that: the pipe laying that the mother's pipe between said voltage regulating station (23) and the boiler room has 10～15m is underground.
5. use natural gas according to claim 1 and 2 carries out pulverized coal boiler ignition and steady combustion system, it is characterized in that: said pulverized coal boiler ignition is provided with steady combustion system and independently purges pipeline (24).
6. use natural gas according to claim 1 and 2 carries out pulverized coal boiler ignition and steady combustion system, it is characterized in that: said spray gun is installed in airduct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102446926A CN101893257B (en) | 2010-08-04 | 2010-08-04 | System for ignition and stable combustion of pulverized coal fired boiler by using natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102446926A CN101893257B (en) | 2010-08-04 | 2010-08-04 | System for ignition and stable combustion of pulverized coal fired boiler by using natural gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101893257A CN101893257A (en) | 2010-11-24 |
| CN101893257B true CN101893257B (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102446926A Active CN101893257B (en) | 2010-08-04 | 2010-08-04 | System for ignition and stable combustion of pulverized coal fired boiler by using natural gas |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287228A (en) * | 2015-06-05 | 2017-01-04 | 江苏腾天工业炉有限公司 | Industrial gas furnace voltage stabilizing pipe-line system |
| CN112594683A (en) * | 2020-12-15 | 2021-04-02 | 安徽长江钢铁股份有限公司 | Nitrogen purging system and process for boiler burner |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070277C (en) * | 1997-06-27 | 2001-08-29 | 魏德军 | Carrier gas evaporation pentane pipeline gas conveyer |
| US6250063B1 (en) * | 1999-08-19 | 2001-06-26 | General Electric Co. | Fuel staging apparatus and methods for gas turbine nozzles |
| JP2002303398A (en) * | 2001-04-04 | 2002-10-18 | Yazaki Corp | Gas pressure adjusting system |
| CN2477966Y (en) * | 2001-05-08 | 2002-02-20 | 山东博山化工机械股份有限公司 | Safety pressure stablizing hot gas feeder |
| JP5105615B2 (en) * | 2008-09-19 | 2012-12-26 | 東京瓦斯株式会社 | Combustion gas supply method and pipeline for supplying the combustion gas |
| CN201416879Y (en) * | 2009-06-18 | 2010-03-03 | 哈尔滨瑞尔能源技术有限公司 | Natural gas pipe valve safety arrangement and management control system |
| CN201779697U (en) * | 2010-08-04 | 2011-03-30 | 济南海普电力节能科技有限公司 | Ignition and stable combustion system for pulverized-coal fired boiler using natural gas |
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| CN101893257A (en) | 2010-11-24 |
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Owner name: SHANDONG YINGDIAN ENERGY SAVING TECHNOLOGY CO., LT Free format text: FORMER OWNER: JI NAN HIPOWER TECHNOLOGY CO., LTD. Effective date: 20140409 |
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Effective date of registration: 20140409 Address after: 250000 Shandong city of Ji'nan province high tech Zone Shun Road No. 1 Building No. 5, Qilu Software Park (Business Plaza E block, room A515) Patentee after: SHANDONG ECO-POWER ENERGY SAVING SCIENCE & TECHNOLOGY CO., LTD. Address before: 250101 Shandong Province, Ji'nan City Xinyu High-tech Development Zone on the west side of the road Licheng District century wealth center block AB room 602 Patentee before: Jinan Hipower Technology Co., Ltd. |
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Effective date of registration: 20151228 Address after: 250000 Shandong city of Ji'nan province high tech Zone Shun Road No. 109 Department of building 302-1 Patentee after: Shandong Environmental Protection Technology Co., Ltd. Address before: 250000 Shandong city of Ji'nan province high tech Zone Shun Road No. 1 Building No. 5, Qilu Software Park (Business Plaza E block, room A515) Patentee before: SHANDONG ECO-POWER ENERGY SAVING SCIENCE & TECHNOLOGY CO., LTD. |