CN202074562U - Pulverized coal rich-lean concentration ratio adjusting device suitable for rich-lean burner - Google Patents
Pulverized coal rich-lean concentration ratio adjusting device suitable for rich-lean burner Download PDFInfo
- Publication number
- CN202074562U CN202074562U CN 201120090382 CN201120090382U CN202074562U CN 202074562 U CN202074562 U CN 202074562U CN 201120090382 CN201120090382 CN 201120090382 CN 201120090382 U CN201120090382 U CN 201120090382U CN 202074562 U CN202074562 U CN 202074562U
- Authority
- CN
- China
- Prior art keywords
- burner
- adjusting device
- rich
- lean
- pulverized coal
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a pulverized coal rich-lean concentration ratio adjusting device suitable for a rich-lean burner. The pulverized coal rich-lean concentration ratio adjusting device comprises a direct flow burner communicated with a gas combustion flame path of a gas burner, wherein an adjustable baffle plate is arranged in the direct flow burner and is fixedly connected with a wear resisting plate, and the wear resisting plate is connected with a gear worm adjusting device. In the utility model, the adjustable baffle plate is added in the ordinary direct flow burner and is fixedly connected with the wear resisting plate, and the wear resisting plate is connected with a gear worm adjusting device, so that the adjustable baffle plate can move vertically by adjusting a gear worm to achieve the purpose that the rich-lean phase pulverized coal ratio is adjustable.
Description
Technical field
The utility model belongs to the Thermal Power Engineering of Power Plant technical field, is specifically related to a kind of coal powder light-dark of shade burner that is applicable to and compares adjusting device.
Background technology
DC burner is used the earliest, kind is also many, and common have conventional DC burner, direct current surrounding air burner, sandwich-wind combustor, horizontal bias burner, cross center wind combustor, multi-functional hull, WR burner, EI type burner, PM type burner and a multicenter combustor etc.Various burners are only different aspect a spout structure pattern and a wind adapter.
The conventional DC spout: one time airduct is the circumference transiens, a circular end and an airduct casting elbow join, and an outstanding reflex block is cast or fixed to back of the body arc side in this elbow of some boiler, on the one hand abrasionproof, play reflex on the one hand, a square end joins by seal box and spout.Be provided with vertical gusset of eliminating the breeze airflow rotation in the adapter.The deflector of horizontal direction is housed in the spout, during the spout swing, makes the breeze airflow jet direction consistent with pendulum angle.
WR type burner: WR---mean wide regulating ratio.Its early stage structure is that primary air nozzle is divided into two air ports that can swing, and two spouts close up when high load capacity, during underload, then separate up and down at a certain angle, has now developed to be dress V-type bluff body in the spout.The characteristics of this burner are with vertically-arranged or near the elbow that the wind jet pipe and the burner of vertically-arranged joins, and do not add reflex block in the elbow, and the airduct of level that joins with elbow also is by circle change side, and a horizontal division board is arranged in the pipe.The breeze airflow elbow of flowing through, under centrifugal action, dense phase pulverized coal becomes to combining in the back of the body arc side on elbow top, and the dividing plate in a time wind is taken over will keep the fluidised form of the deep or light separation of breeze airflow, and dense, light phase breeze airflow is introduced burner hearth by upper and lower two parts of spout respectively.
From all up till now fixedly V-type bluff bodies of the intention of upper and lower two primary air nozzles of original design, both have had bigger difference.The waveform at V-type bluff body edge and the thermal expansion of turnup structure under can compensating high temperature, mainly be the contact-making surface that increases breeze airflow and high-temperature flue gas, and make the miscarriage of working off one's feeling vent one's spleen give birth to stronger disturbance, entrainment flue gas, form and reflux, improve the ignition condition of a wind, realize the low-load combustion-stabilizing function.The WR spout of this fixing V-type bluff body uses on the most of bituminous coal of China, meager coal boiler.But be noted that not to be characteristic, because when high load capacity, remain dense, light two-phase separately for wide regulating ratio.
The burner of band spiral homogenize plate: this type burner has been arranged a spirality reciprocating type guide plate in a wind is taken over, in the airduct elbow of vertically-arranged reflex block is housed, the porch guide plate of horizontal nozzle is a vertical direction, and revolve gradually and be horizontal direction, its effect is to make the breeze airflow homogenize, eliminates the deviation that coal powder density distributes.This burner be for the opposite consideration of WR type burner: to combustibility bituminous coal preferably, when coal powder density is uneven, can cause local oxygen enrichment of spout outlet area or local anoxic, unfavorable to initiation combustion, therefore emphasized homogenize.
Multifunctional burner: multifunctional burner also claims hull, stable combustion technology for the exploitation of Thermal Power Engineering system of Tsing-Hua University, one of its major function makes the bigger recirculating zone of the inner formation of wind outlet breeze airflow one time for hull, and the high-temperature flue gas that entrainments promotes a wind advanced ignition.
PM (Pollution Minimum) type burner: PM type burner is former to mean low pollution products, is dense, the light divergence type burner of a kind of vertical direction, by an airduct elbow, a wind is divided into last dense light two spouts down, joins unit pulverized-coal system.
The binary channels burner: this type burner full name is a binary channels self-stabilization type burner, is that two-layer primary air nozzle is reduced in the cavity, and both sides are long and narrow overfiren air port in the about 400mm of cavity length, cavity, and the steam jet nozzle is housed simultaneously.Its principle is to rely on the sudden expansion effect of high-speed jet to entrainment high-temperature flue gas, and reduces primary air velocity, reaches from steady combustion effect.This type burner is used for minority meager coal boiler, can be described as the cavity stable combustion technology.
The horizontal bias burner: venetian blind type horizontal bias burner is a shutter of arranging that in a horizontally disposed wind is taken over a plurality of interlaced concentrated grid are formed, when a wind breeze airflow is flowed through shutter, launch in the concentrated phase air-flow after most of pulverized coal particle and the collision of concentrated grid, the concentrated phase air-flow is concentrated, and the concentrated phase air-flow is guided the side of waring oneself in front of a fire into.Shutter can be adjusted, and makes cocnentration factor and change in resistance.This type burner is mainly used in bad bituminous coal and meager coal boiler, pastes wall to alleviate the water-cooling wall slagging scorification and to reduce the NOx function and consider that it also is feasible being used for bituminous coal fired boiler from preventing a wind.
The advantage of louver pulverized coal concentrator:
1) is implemented in adjusting cocnentration factor in service, satisfies the needs that various loads and coal change;
2) cocnentration factor of inspissator is big, and promptly concentrating and separating is effective, can satisfy the needs that unburnable coal changes;
3) burner nozzle arranges that the free degree is big, helps the optimization of burner;
4) resistance is moderate;
5) simple in structure;
6) be easy to dock with existing system.
The EI type is being strengthened ignition combustor
Strengthening the coal nozzle (EI nozzle) that catches fire is by the class that Alstom develops burner to be caught fire fast in certain distance, volatile matter conflagration in the zone of rich fuel, reduce the discharge capacity of NOx, prolong coke burning time simultaneously, to reduce the burner of uncompleted burned carbon heat loss as much as possible.
The various DC burner of prior art comprises shade type and non-shade type burner, and it is adjustable wherein having only the venetian blind type pulverized coal concentrator, and other pulverized coal concentrator is all unadjustable.For coal-burning boiler, using fuel is often change, and change bigger sometimes, and fixed pulverized coal concentrator must depart from best cocnentration factor when bigger variation takes place ature of coal, thereby the effect of shade burner is had a greatly reduced quality, and it is necessary therefore adopting the shade burner of cocnentration factor adjustable type.
For the venetian blind type pulverized coal concentrator, owing to concentrate between the baffle plate and the breeze airflow direction of motion angle is arranged, the coal dust solid particle is very strong to the souring of baffle plate, causes the baffle plate wearing and tearing very fast, must adopt high-abrasive material.
Summary of the invention
The purpose of this utility model is to provide a kind of and is guaranteeing to reduce the wearing and tearing of metal baffle under adjustable situation as far as possible, and the coal powder light-dark that is applicable to shade burner that reduces the high-abrasive material use amount simultaneously compares adjusting device.
For achieving the above object, the technical solution adopted in the utility model is: comprise the DC burner that is connected with the fuel gas buring quirk of gas burner, in DC burner, be provided with a fender plate, this fender plate is fixedlyed connected with wearing plate, and wearing plate links to each other with the worm and gear adjusting device.
Described fender plate is parallel with the airflow direction in the DC burner, and gas-flow resistance is very little.
The outlet of described fuel gas buring quirk also is provided with guiding cone.
The utility model increases a fender plate in the conventional DC burner, fender plate is fixedlyed connected with wearing plate, wearing plate is connected with the worm and gear adjusting device, thereby by regulating worm and gear fender plate is moved up and down, and has reached the purpose of deep or light phase coal dust adjustable ratio.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Referring to Fig. 1, the utility model comprises the DC burner 3 that is connected with the fuel gas buring quirk 2 of gas burner 1, outlet at fuel gas buring quirk 2 is provided with guiding cone 7, in DC burner 3, be provided with a fender plate 4, this fender plate 4 is fixedlyed connected with wearing plate 5, wearing plate 5 links to each other with worm and gear adjusting device 6, and fender plate 4 is parallel with the airflow direction in the DC burner 3.
Thereby the utility model moves up and down fender plate by regulating worm and gear, has reached the purpose of deep or light phase coal dust adjustable ratio.The flow path direction of meeting at fender plate adds and is about 100mm, and this part is adopted the high-abrasive material manufacturing.Because this slab integral is parallel to airflow direction, and adopt wearing piece meeting the stream end, therefore, the utility model has abrasionproof, wear-resisting effect on structure and material.
The utility model is the technology of using on the solid-fuelled burner of the difficult combustion of using gases ignited fuel, uses this technological means, can make the solid fuel of lighting same quantity, and the consumption of gaseous fuel reduces.The theoretical foundation that can reach effect like this is: breeze airflow fire burns have a best coal powder density zone, under best coal powder density, the ignition temperature of breeze airflow is minimum, the heat of lighting this fuel requirement external world is few more.
For example, if do not adjust the position of skimming baffle, igniting needs gas quantity at least more than 12～15% (referring to percent of calories), and coal dust is gone into behind the stove because the cooling effect in the vast space of burner hearth does not have its combustion efficiency of clean-burning coal dust relatively poor.Adjust baffle plate to the optimum position, the igniting air consumption can be reduced to about 10%, and combustion efficiency is better.
For different coals, its ignition temperature difference makes the minimum best coal powder density of ignition temperature also different, so this burner application need constantly adjust during boiler operatiopn in boiler, seeks only position.
Claims (3)
1. a coal powder light-dark that is applicable to shade burner compares adjusting device, it is characterized in that: comprise the DC burner (3) that is connected with the fuel gas buring quirk (2) of gas burner (1), in DC burner (3), be provided with a fender plate (4), this fender plate (4) is fixedlyed connected with wearing plate (5), and wearing plate (5) links to each other with worm and gear adjusting device (6).
2. the coal powder light-dark that is applicable to shade burner according to claim 1 is characterized in that than adjusting device: described fender plate (4) is parallel with the airflow direction in the DC burner (3), and gas-flow resistance is very little.
3. the coal powder light-dark that is applicable to shade burner according to claim 1 is characterized in that than adjusting device: the outlet of described fuel gas buring quirk (2) also is provided with guiding cone (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120090382 CN202074562U (en) | 2011-03-31 | 2011-03-31 | Pulverized coal rich-lean concentration ratio adjusting device suitable for rich-lean burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120090382 CN202074562U (en) | 2011-03-31 | 2011-03-31 | Pulverized coal rich-lean concentration ratio adjusting device suitable for rich-lean burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202074562U true CN202074562U (en) | 2011-12-14 |
Family
ID=45112663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120090382 Expired - Fee Related CN202074562U (en) | 2011-03-31 | 2011-03-31 | Pulverized coal rich-lean concentration ratio adjusting device suitable for rich-lean burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202074562U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091341A (en) * | 2014-05-16 | 2015-11-25 | 林内株式会社 | Heat source machine |
| CN112555885A (en) * | 2020-11-06 | 2021-03-26 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Coal powder concentration and dilution separation device and coal-fired boiler combustion system |
-
2011
- 2011-03-31 CN CN 201120090382 patent/CN202074562U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091341A (en) * | 2014-05-16 | 2015-11-25 | 林内株式会社 | Heat source machine |
| CN105091341B (en) * | 2014-05-16 | 2019-04-12 | 林内株式会社 | Heat source machine |
| CN112555885A (en) * | 2020-11-06 | 2021-03-26 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Coal powder concentration and dilution separation device and coal-fired boiler combustion system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101315184B (en) | Wall type arranged horizontal rich-lean direct current combustion device | |
| CN102434878A (en) | Three-layer secondary air low nitrogen oxide swirling burner | |
| CN103134049B (en) | A kind of multiple dimensioned coal dust decoupling combustion device of the polygonal circle of contact and decoupling burning method thereof | |
| CN102620291B (en) | Pulverized coal decoupling combustor with low nitrogen oxide discharge and pulverized coal decoupling combustion method with low nitrogen oxide discharge | |
| CN103267282B (en) | Deep or light separation coal burner | |
| CN202082915U (en) | W-shape flame boiler with grading secondary air layout structure | |
| CN202350012U (en) | Multi-angular tangential circle multi-scale coal dust decoupling combustion device | |
| CN110319437B (en) | Oxygen-enriched multi-flame rotational flow pulverized coal burner | |
| CN109931605B (en) | Multistage air distribution radial outer thick and inner thin cyclone burner | |
| CN201935184U (en) | Stable-combustion environment-friendly cyclone pulverized coal burner | |
| CN202074562U (en) | Pulverized coal rich-lean concentration ratio adjusting device suitable for rich-lean burner | |
| CN104154532A (en) | Center air ring concentrated type turbulent burner | |
| CN111947136B (en) | Combustion method of W flame boiler with flexible peak regulation and self-stabilization combustion performance | |
| CN201215311Y (en) | Adjustable bias jet DC coal burner | |
| CN103697463B (en) | The burner of upper and lower deep or light First air centralized arrangement | |
| CN104329669A (en) | Bitangent circular thick and thin separation adjustable direct-current coal powder combustor | |
| CN204574022U (en) | Many bluff bodies air-coal separating coal powder burner | |
| CN111189044A (en) | Burner with adjustable pulverized coal airflow speed for W-flame boiler and adjusting method thereof | |
| CN204420987U (en) | The burner of W flame boiler and W flame boiler | |
| CN205227306U (en) | Deep or light hierarchical buggy low NOx burner | |
| CN100585276C (en) | Side direction multilevel open type igniting center powder feeding vortex combustor of small oil mass gasification combustion | |
| CN201212676Y (en) | Horizontal bias DC combustion apparatus of wall arrangement | |
| CN201875703U (en) | Pulverized coal burner and pulverized coal boiler | |
| CN201306708Y (en) | Quick ignition coal dust nozzle capable of automatically adjusting ignition point | |
| CN201582804U (en) | Tangential-circle swirl combustion equipment of industrial pulverized-coal fired boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20170331 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |