CN203810436U - Feeding device for biomass granular fuel - Google Patents

Feeding device for biomass granular fuel Download PDF

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Publication number
CN203810436U
CN203810436U CN201420164150.1U CN201420164150U CN203810436U CN 203810436 U CN203810436 U CN 203810436U CN 201420164150 U CN201420164150 U CN 201420164150U CN 203810436 U CN203810436 U CN 203810436U
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CN
China
Prior art keywords
hopper
feeding
batcher
fuel
biomass
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CN201420164150.1U
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Chinese (zh)
Inventor
赵卫
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上海益格新技术工程有限公司
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Priority to CN201420164150.1U priority Critical patent/CN203810436U/en
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Publication of CN203810436U publication Critical patent/CN203810436U/en

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Abstract

The utility model discloses a feeding device for biomass granular fuel. The feeding device is characterized by comprising a hopper arranged on a grate, wherein the top part of the hopper is connected with a feeding machine directly or through a connecting pipe; the top part of the feeding machine is communicated with a stock bin; a coal strobe is arranged on the hopper, and is connected with the transmission shaft of a transmission device. The feeding device overcomes the defect of sprinkling under wind power, can ensure that a material layer is smooth and uniform, can control tempering, and is simple to mount and low in investment; the feeding quantity of the biomass fuel can be regulated so long as the capacity of the feeding machine and the capacity of the hopper are regulated on the basis of the boiler capacity, and the thickness of the material layer can be regulated by regulating the height of the coal strobe; the uniform and smooth feeding of the biomass fuel on the grate-firing grate is realized, the combustion efficiency is effectively improved, and the discharge of harmful flue gas is lowered; the feeding device can further be applied in a feeding system of granular fuel with the same problems.

Description

A kind of biomass granule fuel charging gear

Technical field

The utility model relates to a kind of feeding system of granular fuel, for the feed of biomass granule fuel, belongs to biomass fuel technical field.

Background technology

Coal is the most important primary energy of China, accounts for 62% of primary energy.Coal fired power generation and heating for us, facilitate and comfortable in, also discharging a large amount of dust, sulfur dioxide, nitrogen oxide and greenhouse gases carbon dioxide, our living environment has also been polluted in these discharges.Along with China has strengthened discharge renovation dynamics for improving haze, use environmentally-friendly alternative fuel to become inexorable trend.

Biomass energy is a kind of desirable regenerative resource, and biomass energy is compared with fossil fuel, has the following advantages: 1. recyclability, has a large amount of industry, agricultural and forest discarded object output every year.2. low contaminative, its SOX, NOX concentration of emission are extremely low.And living beings are in its growth cycle, and the clean discharge capacity of the carbon dioxide of atmosphere is similar to zero, can effectively alleviate greenhouse effects.In developing country, biomass energy (being mainly corn, wheat rice straw, rice husk, straw, wooden class) is occupied larger proportion, reaches more than 50%.

Conventionally the coal supply system of coal burning layered boiler is that coal is added in the hopper of stokehold, and the coal in hopper is fallen on fire grate, and coal-supplying amount is to control by fire grate and with the rotating speed of the governing box of its interlock, and the thickness in coal seam is controlled by coal gate.

The feeding system of common biomass fuel grate firing boiler is the mode that adopts wind-force to shed.This feed-type is mainly the tempering phenomenon existing in order to solve biomass fuel.So-called tempering is that ignition temperature is low because the volatile matter of biomass fuel is high, therefore, if the hopper by stokehold is directly given on fire grate by biomass fuel, because the ignition point of biomass fuel is near hopper, high-temperature flue gas and flame are easy to hopper, even the ignited fuel in feed bin.So shed and biomass fuel be given to slightly away from hopper local by wind-force, will after ignition point, move, avoid tempering.The major defect that wind-force is shed has: first cannot guarantee the uniformity of thickness of feed layer.Thickness of feed layer is uneven, easily causes burning uneven.The thin place of bed of material resistance is little, ventilates strong, and burning velocity is fast, and it is less that resistance becomes, and easily forms perforation.The place that the bed of material is thick, because resistance is large, ventilates not smooth, and incomplete combustion, has increased unburned carbon loss, thereby has reduced boiler efficiency.The secondth, wind-force has been shed part of fuel and has directly been taken out of by flue gas, has both increased unburned carbon loss, has reduced boiler efficiency, has increased again investment and the operating cost of follow-up dust pelletizing system.

Summary of the invention

To be solved in the utility model is that existing biomass granule fuel feeding system adopts wind-force to shed the bed of material skewness that feed causes, and the technical problem of tempering phenomenon easily occurs the low and biomass granule fuel of boiler efficiency.

In order to address the above problem, the technical scheme that the utility model provides is: a kind of biomass granular fuel boiler charging gear, it is characterized in that, and comprise the hopper of being located on fire grate, the top of hopper is by tube connector or be directly connected with batcher, and the top of batcher is communicated with feed bin; Described hopper is provided with coal gate, and coal gate is connected with the power transmission shaft of transmission device.

Preferably, described hopper is provided with flashboard and at least one valve.

Further, the width of described hopper lower openings width, flashboard width, coal gate is all identical with fire grate effective width.

Preferably, described hopper is provided with two level-sensing devices that distribute up and down.

Preferably, described hopper is provided with the temperature sensor of by-pass valve control and batcher.

Preferably, described hopper is provided with steel pipe, and steel pipe is located at hopper upper area, is horizontally placed on hopper cover plate or integrated with cover plate, or is arranged in the panel of hopper or tube connector, fixes with the side plate of hopper or tube connector; The outer end of steel pipe is connected with external water source or liquid fire-fighting equipment by valve, and the inner is enclosed construction; Steel pipe is provided with aperture.

Batcher can adopt star-shaped feeding machine, close the equipment with feed function of the patterns such as air door, screw(-type) feeder, disk feeder and/or revolving plow reclaimer; Aperture quantity on steel pipe and size are determined according to place capacity and control temperature; The signal that valve provides according to temperature sensor opens or closes.The high limited signal of temperature sensor offers batcher, automatically or/and manual-lock batcher; The signal that batcher provides by level-sensing device is controlled, and can be interrupted feed, also can continuous-feeding.

The utility model has overcome the shortcoming that wind-force is shed, and both can guarantee the smooth even of the bed of material, and tempering also can be controlled, and small investment is installed simply; As long as adjusting the capacity of batcher and hopper according to boiler capacity is the feeding coal of capable of regulating biomass fuel, by adjusting the height of coal gate, can adjust the thickness of the bed of material; Realize biomass fuel even and smooth feed on grate firing fire grate, effectively raised efficiency of combustion, reduced the discharge of harmful smoke.The utility model also can be used on the feeding system of the granular fuel with equal problem.

Compared with prior art, the utility model has the advantage of:

1. the mechanical feed of realizing biomass granule fuel, has reduced labour intensity;

2. the ratio that realizes feeding coal by batcher regulates, and effectively control combustion process, improves boiler efficiency;

3. hopper and feed bin are effectively isolated, and have eliminated the tempering risk of biomass fuel;

4. compact conformation, is easy to arrange, is easy to operation maintenance.

Accompanying drawing explanation

The front view of the biomass granule fuel charging gear that Fig. 1 provides for the utility model;

Fig. 2 is the side view of Fig. 1.

The specific embodiment

For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.

Embodiment

With a 5800kW, take the charging gear of the traveling-grate stoker heat conducting oil boiler that palm shell is fuel as example, as shown in Figure 1-2, the structural representation of a kind of biomass granular fuel boiler charging gear providing for the present embodiment, comprise the hopper 3 of being located on fire grate 5 (adopting scale chain grate in the present embodiment), the top of hopper 3 is passed through tube connector 7 or is directly connected with batcher 2, and the top of batcher 2 is communicated with feed bin 1.Hopper 3 is provided with coal gate 4, flashboard 6 and at least one valve 11, and coal gate 4, between hopper 3 and boiler front arch panel, is suspended on by chain 14 on the power transmission shaft of transmission device 13, and transmission device 13 is fixed by bolts on hopper 3.The width of hopper 3 lower openings width, flashboard 6 width, coal gate 4 is all identical with fire grate effective width.Hopper 3 is provided with two level-sensing devices 8 that distribute up and down (the present embodiment level-sensing device adopts blocking rotary type level-sensing device).When hopper 3 low material level, level-sensing device 8 sends signal to batcher, batcher 2 operations; When hopper 3 high charge level, level-sensing device 8 sends signal to batcher 2, and batcher 2 is out of service.

Hopper 3 is provided with steel pipe 10, and steel pipe 10 is arranged on hopper 3 upper areas, is horizontally placed on hopper 3 cover plates or integrated with cover plate, or through the panel of tube connector 7, fixes with the side plate of tube connector 7; The outer end of steel pipe 10 is connected with external water source or other liquid fire-fighting equipment by valve 11, and the inner is enclosed construction; Steel pipe 10 is provided with aperture.

Feed bin 1 for capacity be 10M 3airtight pyramidal structure container, by Plate Welding, formed, feed bin 1 supports on the ground by support 15.Feed bin 1 volume is in order to alleviate material loading workload at night, moves that required fuel quantity determines according to boiler night.On feed bin 1, be provided with peep hole 15, by peep hole 15, can observe the material level in feed bin 1 and whether have and put up a bridge and caking phenomenon.On feed bin 1, material toggling rod can also be set, for the granular fuel of loose silo 1.

Batcher 2 can adopt star-shaped feeding machine, close the equipment with feed function of the patterns such as air door, screw(-type) feeder, disk feeder and/or revolving plow reclaimer, in the present embodiment, adopt star-shaped feeding machine, it is comprised of feed inlet and outlet, casing, impeller and transmission device; Casing and feed inlet and outlet are formed by Plate Welding, be flange be connected with feed bin 1, hopper 3.Blade in circumference of impeller is divided into 5 groups vertically, and 12 every group uniform.The signal that batcher 2 provides by level-sensing device 8 is controlled, and by frequency converter, can realize continuous adjusting.The feeding coal of the present embodiment batcher can regulate continuously within the scope of 0~2000kg/11.

Hopper 3 is flat-shaped pyramidal structure containers, by Plate Welding, is formed.Its bottom opening width is with the width of fire grate 5.Level-sensing device 8 has upper and lower two material level measuring points, detects respectively the high and low material level of hopper 3.This signal is used for controlling the start and stop of batcher 2, and when material level is low, batcher 2 starts feed, and when material level is high, batcher 2 stops feed, the material level of hopper 3 can be controlled in certain scope like this.

Steel pipe 10 is arranged on the top of hopper 3, horizontal on hopper 3 through hopper 3 front panels, fixes with biside plate.Steel pipe 10 internal diameter 25mm.A magnetic valve valve 11 has been installed in steel pipe 10 outer end imports, and normal condition lower valve 11 is in closed condition.The signal that valve 11 provides according to sensor 9 opens or closes.The signal of sensor 9 passes to batcher 2 simultaneously, and when batcher receives the high temperature signal of sensor 9, batcher 2 will be automatically or/and manual-lock.Steel pipe 10 is inner, and with closure plate 12 shutoff, this end also has the aperture that diameter is 8mm, and aperture quantity and size can and be controlled temperature and determine according to place capacity.

The sensor 9 arranging on hopper 3 is for detecting the temperature of hopper 3.This temperature signal passes to valve 11 and batcher 2 simultaneously.When temperature is high, valve 11 is opened automatically; When temperature is low, valve 11 is closed automatically.When temperature is high, batcher 2 is automatically out of service.At this moment batcher 2 just can cut off high-temperature gas or the flame in bottom hopper 3, the top feed bin 1 of preventing something from spreading, the tempering phenomenon that has just solved biomass granule fuel like this.

Coal gate 4 is arranged on the rear portion of hopper 3, and coal gate 4 is cast housings, and centre has castable to fill.Coal gate 4 width are with the width of fire grate 5.Transmission device 13 is worm gear structure, and the rotation of rotation worm and gear band movable sprocket, can make chain 14 be wrapped on sprocket wheel, thereby drive coal gate 4 to move up and down.Move up and down coal gate 4 and can adjust the thickness of fuel on fire grate.Coal gate 4 lower frames and grate surface contact-making surface are the position bottom of coal gate 4.When coal gate 4 moves up, the distance of its lower frame and grate surface is thickness of feed layer, when fuel moves through coal gate 4 with fire grate 5, higher than the part of coal gate lower frame, is stopped, the bed of material is calibrated whole, has so just guaranteed the even thickness of biomass granule fuel bed of material on fire grate 5.Under rated load, in the present embodiment, the height of coal gate 4 is 180mm.

Vacuum-packed palm shell is by expecting on electric block in feed bin 1, and the palm shell in feed bin 1 is given in hopper 3 by star-shaped feeding machine 2, and the palm shell in hopper 3 is on fire grate 5.

Claims (6)

1. a biomass granule fuel charging gear, it is characterized in that, comprise the hopper (3) of being located on fire grate (5), the top of hopper (3) is passed through tube connector (7) or is directly connected with batcher (2), and the top of batcher (2) is communicated with feed bin (1); Described hopper (3) is provided with coal gate (4), and coal gate (4) is connected with the power transmission shaft of transmission device (13).
2. biomass granule fuel charging gear as claimed in claim 1, is characterized in that, described hopper (3) is provided with flashboard (6) and at least one valve (11).
3. biomass granule fuel charging gear as claimed in claim 2, is characterized in that, the width of described hopper (3) lower openings width, flashboard (6) width, coal gate (4) is all identical with fire grate effective width.
4. biomass granule fuel charging gear as claimed in claim 1 or 2, is characterized in that, described hopper (3) is provided with two level-sensing devices (8) that distribute up and down.
5. biomass granule fuel charging gear as claimed in claim 1 or 2, is characterized in that, described hopper (3) is provided with the temperature sensor (9) of by-pass valve control (11) and batcher (2).
6. biomass granule fuel charging gear as claimed in claim 1 or 2, it is characterized in that, described hopper (3) is provided with steel pipe (10), steel pipe (10) is located at hopper (3) upper area, be horizontally placed on hopper (3) cover plate or integrated with cover plate, or be arranged in the panel of hopper (3) or tube connector (7), fix with the side plate of hopper (3) or tube connector (7); The outer end of steel pipe (10) is connected with external water source or liquid fire-fighting equipment by valve (11), and the inner is enclosed construction; Steel pipe (10) is provided with aperture.
CN201420164150.1U 2014-04-04 2014-04-04 Feeding device for biomass granular fuel CN203810436U (en)

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CN201420164150.1U CN203810436U (en) 2014-04-04 2014-04-04 Feeding device for biomass granular fuel

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Application Number Priority Date Filing Date Title
CN201420164150.1U CN203810436U (en) 2014-04-04 2014-04-04 Feeding device for biomass granular fuel

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104456547A (en) * 2014-11-27 2015-03-25 江苏太湖锅炉股份有限公司 Feeding structure for suspension combustion biomass boiler
CN104879770A (en) * 2015-04-27 2015-09-02 浙江特富锅炉有限公司 Feeding mechanism of modified structure biomass boiler
CN105114946A (en) * 2015-09-28 2015-12-02 东南大学 Fluidized bed mixing and charging equipment for coal and biomass
CN106196140A (en) * 2016-08-31 2016-12-07 苏州迪森生物能源有限公司 A kind of anti-backfire biomass boiler feeding system
CN106287818A (en) * 2016-09-29 2017-01-04 盐城工学院 One is glowed stove and system of glowing
CN108006613A (en) * 2017-11-20 2018-05-08 河北约翰节能设备科技有限公司 Reduce the air supply device and method of boiler discharged nitrous oxides total amount
CN110671694A (en) * 2019-09-30 2020-01-10 大唐东营发电有限公司 Environment-friendly boiler for power plant

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104456547A (en) * 2014-11-27 2015-03-25 江苏太湖锅炉股份有限公司 Feeding structure for suspension combustion biomass boiler
CN104879770A (en) * 2015-04-27 2015-09-02 浙江特富锅炉有限公司 Feeding mechanism of modified structure biomass boiler
CN105114946A (en) * 2015-09-28 2015-12-02 东南大学 Fluidized bed mixing and charging equipment for coal and biomass
CN106196140A (en) * 2016-08-31 2016-12-07 苏州迪森生物能源有限公司 A kind of anti-backfire biomass boiler feeding system
CN106287818A (en) * 2016-09-29 2017-01-04 盐城工学院 One is glowed stove and system of glowing
CN106287818B (en) * 2016-09-29 2018-12-11 盐城工学院 One kind is glowed furnace and system of glowing
CN108006613A (en) * 2017-11-20 2018-05-08 河北约翰节能设备科技有限公司 Reduce the air supply device and method of boiler discharged nitrous oxides total amount
CN110671694A (en) * 2019-09-30 2020-01-10 大唐东营发电有限公司 Environment-friendly boiler for power plant

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