CN201779697U - Ignition and stable combustion system for pulverized-coal fired boiler using natural gas - Google Patents
Ignition and stable combustion system for pulverized-coal fired boiler using natural gas Download PDFInfo
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- CN201779697U CN201779697U CN2010202811573U CN201020281157U CN201779697U CN 201779697 U CN201779697 U CN 201779697U CN 2010202811573 U CN2010202811573 U CN 2010202811573U CN 201020281157 U CN201020281157 U CN 201020281157U CN 201779697 U CN201779697 U CN 201779697U
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Abstract
The utility model belongs to the field of an auxiliary machine of a boiler, in particular to an ignition and stable combustion system for a pulverized-coal fired boiler using natural gas. The ignition and stable combustion system comprises a boiler ignition system communicated with a natural gas supply pipe. The ignition and stable combustion system is characterized in that a pressure regulating station is arranged between the natural gas supply pipe and the boiler ignition system; a gas source master cut-off valve is arranged on the natural gas supply pipe in the front of the pressure regulating station; the pressure regulating station is formed by sequentially connecting a gas-distributing cylinder, a multi-path parallel pressure regulating pipeline and a gas collection cylinder; a main pipe extended out from on the gas collection cylinder enters a boiler house; and a lead-out pipeline on the main pipe is communicated with a natural gas spray gun on each pulverized coal burner. The ignition and stable combustion system has the advantages that the problem of oil gun blockage in case of fuel ignition is avoided, the cost of boiler ignition and stable combustion is greatly reduced, the stability of boiler ignition is improved, no additional steam is required for fuel atomization, the economical efficiency is enhanced and the installation cost is saved by using a part of the original fuel pipeline.
Description
(1) technical field
The utility model belongs to the boiler accessory machinery field, and 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 the 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, easily stops up as the oil gun mouth, the easy failure of igniting 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 utility model 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 deficiencies in the prior art.
The utility model is achieved by the following technical solution:
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, the total stop valve of source of the gas is installed on the natural gas supply pipe before the voltage regulating station; Voltage regulating station is formed by connecting by sub-cylinder, multidiameter delay pressure regulation pipeline and gas collection cylinder successively, stretches out female pipe on the gas collection cylinder and enters the boiler room, draws the locational natural gas spraying gun of each coal burner of pipeline connection on female pipe.
The utility model is introduced 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 the natural gas fuel of fuel oil as an alternative, 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 utility model 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, bypass pipe in parallel 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 described mother who enters the boiler room manages by flowing to and is provided with exhaust stack, self-contained pressure regulator, low pressure limit switch in parallel and upper pressure limit switch, thermometer, safety valve successively, 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 described spray gun.
Female pipe between described voltage regulating station and the boiler room has the pipe laying of 10～15m underground, imports the boiler room into to prevent noise.
Described 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.
Described spray gun is installed in airduct, and is identical with former small oil gun position.
The oil gun blockage problem that the utility model has taken place when having avoided adopting fuel ignition, greatly reduce ignition of the boiler and steady combustion cost, improved the stability of ignition of the boiler, do not need to carry out fuel-oil atmozation with extra steam, improved economy, can use the original fuel pipe of part, save installation cost.
(4) description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing is a schematic flow sheet of the present utility model.
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 utility model.This embodiment is as follows:
Introduce combustion gas by natural gas supply pipe 22 and behind the total stop valve 19 of source of the gas, enter 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 bypass pipe 16 in parallel, parallel pressure regulation pipeline is in parallel with 21 realizations of gas collection cylinder by 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 by female 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, enter the boiler room stepmother and manage by flowing to the low pressure limit switch 3 of establishing exhaust stack 6, self-contained pressure regulator 7, parallel connection successively and upper pressure limit switch 4, thermometer 2, safety valve 1 and being 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 female 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 utility model 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 when purging, can in time diffuse.
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 (7)
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 by 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 enters the boiler room, draws the locational natural gas spraying gun of each coal burner of pipeline connection on female pipe.
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 described parallel pressure regulation pipeline, all be provided with blow-off pipe (17) on sub-cylinder (20) and the gas collection cylinder (21), gas collection cylinder (21) be equipped with safety valve (10 and the other end of safety valve (1) be 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 described mother who enters the boiler room manages by flowing to and is provided with exhaust stack (6), self-contained pressure regulator (7), low pressure limit switch (3) in parallel and upper pressure limit switch (4), thermometer (2), safety valve (1) successively, 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: be provided with hand off valve (13), flowmeter (9), flow control valve (10), Pressure gauge (11), safety cut-off magnetic valve (12) successively by flowing to before the described spray gun.
5. use natural gas according to claim 1 and 2 carries out pulverized coal boiler ignition and steady combustion system, and it is characterized in that: the female pipe between described voltage regulating station (23) and the boiler room has the pipe laying of 10～15m underground.
6. use natural gas according to claim 1 and 2 carries out pulverized coal boiler ignition and steady combustion system, and it is characterized in that: described system is provided with and independently purges pipeline (24).
7. use natural gas according to claim 1 and 2 carries out pulverized coal boiler ignition and steady combustion system, it is characterized in that: described spray gun is installed in airduct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202811573U CN201779697U (en) | 2010-08-04 | 2010-08-04 | Ignition and stable combustion system for pulverized-coal fired boiler using natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202811573U CN201779697U (en) | 2010-08-04 | 2010-08-04 | Ignition and stable combustion system for pulverized-coal fired boiler using natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201779697U true CN201779697U (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202811573U Expired - Lifetime CN201779697U (en) | 2010-08-04 | 2010-08-04 | Ignition and stable combustion system for pulverized-coal fired boiler using natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201779697U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893257A (en) * | 2010-08-04 | 2010-11-24 | 济南海普电力节能科技有限公司 | System for ignition and stable combustion of pulverized coal fired boiler by using natural gas |
| CN103203514A (en) * | 2013-04-23 | 2013-07-17 | 陕西华秦新能源科技有限责任公司 | Oxyhydrogen flame numerical control punching and cutting process |
-
2010
- 2010-08-04 CN CN2010202811573U patent/CN201779697U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893257A (en) * | 2010-08-04 | 2010-11-24 | 济南海普电力节能科技有限公司 | System for ignition and stable combustion of pulverized coal fired boiler by using natural gas |
| CN103203514A (en) * | 2013-04-23 | 2013-07-17 | 陕西华秦新能源科技有限责任公司 | Oxyhydrogen flame numerical control punching and cutting process |
| CN103203514B (en) * | 2013-04-23 | 2016-01-06 | 陕西华秦新能源科技有限责任公司 | A kind of oxyhydrogen flame numerical control punch-cuts technique |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110330 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |