CN2208045Y - Gas generator from poor quality coal - Google Patents

Abstract

The utility model relates to a gas generator from poor quality coal. A double-bell jar coal feeder is arranged above a furnace body. The lower part of a furnace roof is weld with a set of coal distributors, and the side face is provided with a gas inlet pipe port. A skirt plate on the lower part of the furnace body extends into an ash tray, and a slag broken plate and an ash-removing plough are welded on the skirt plate. A grate comprises a blast cap layer, a grate layer, and a base. The base, the ash tray, and a driving device are connected into one unit. A mixer is connected to one side of a lower air pipe. The utility model has the advantages of low equipment investment, convenient operation, and low cost.

Description

Gas generator from poor quality coal

The utility model belongs to by solid carbon-contg material production producer gas technical field, particularly a kind of device with gasification of poor coal.

Current, owing to reasons such as environment protection and energy utilization rates, the coal scope of using that directly acts as a fuel is dwindled greatly.The substitute is and be translated into coal gas clean, high utilization rate.The gas making technology of coal is ripe already preferably for quality.The for example domestic all kinds of fixed bed coal gas producers that more generally adopt.But the gasification technology of low grade coal still is among the research.Reason is that low grade coal exists moisture content height, ash height, fugitive constituent height, chemically reactive height, weakness such as carbon content is low, physical strength is low, thermal stability is low, ash fusion point is low, easily broken in gasification, easily slagging scorification, ash discharge amount are big, make gasification condition deterioration in the stove, bring a lot of difficulties to gas making.For finishing gasification of poor coal, must seek new way.The technology of carrying out gasification of poor coal of stablizing that has proposed at present has Ke Pasi one Tuo Qiekefa, Lurgi process, Texaco method etc.These methods all belong to pressurization producer gas production technology.Be feed coal and oxygen and flow and at high temperature carry out fluidized-bed system gas that as Ke Pasi one Tuo Qiekefa lime-ash is discharged vapourizing furnace in liquid mode.But these class methods are brought some new problems again, handle complexity as giving of coal, and the oxygen depletion amount is big, and the equipment consumption is big, need with bearing highly compressed equipment, and gas-making process difficulty height finally causes the cost of coal gas to increase.

Assorted for the equipment that overcomes on the existing smut gasification technology, the gas-making process difficulty is big, the shortcoming that the output gas cost is high.The purpose of this utility model is to propose a kind of less investment, and is easy to operate, the gasification of poor coal equipment that the gas making cost is low.

The purpose of this utility model is achieved in that

A kind of low grade coal producer gas generator, it is characterized in that above body of heater, being equipped with the double belljar stoker, form by the manual coal mechanism of weight by two eclipsed circular shells and side system, interior outstanding two conical bell jars, body of heater is by furnace roof, housing, full water jacket samdwich is formed, be welded with three below and be supported on ground leg, the furnace roof bottom is welded with one group of coal distributing device, water-in is arranged at the body of heater bottom, the steam water interface outlet is arranged at top, also is provided with the gas exit pore, and the skirtboard of body of heater bottom stretches in the ash-pan, its inboard is welded with oblique densely covered angle steel, constitute the break plate, the outside is welded with 1 ash disposal plough, and grate comprises the blast cap layer, the grate layer, base, all be welded as a whole and pass through mutually with cloth solar or lunar halo, because of fixing on the base, base is fixed on the ash-pan, and ash-pan is fixed on the worm gear, links to each other with motor through transmission mechanism, grate and base outer surface are respectively equipped with the ash discharge muscle, the break cutter, the break awl, the gray moving cutter is equipped with airduct in the bottom.

The utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is a low grade coal producer gas generator structure iron.

Fig. 2 is a Venturi meter mixing tank sectional view.

Fig. 3 is the grate front view.

Fig. 4 is the grate vertical view.

Fig. 5 is a furnace roof coal distributing device upward view.

Fig. 6 is the circumferential local stretch-out view of coal distributing device.

Wherein: 1-double belljar stoker, 2-body of heater, 3-mixing tank, 4-grate, the 5-base, 6-transmission mechanism, 7-airduct, 8-fly-ash separator, the 9-ash-pan, 10-humidity discharging pipe, 11-break plate, 12-manhole, 13-exports pore, the 4th layer of grate of 14-, 15-ash discharge muscle, 16-cloth solar or lunar halo, 17-break cutter, 18-gray moving cutter, 19-coal distributing device, 20-break awl, the 21-grate, 22-fire exploring hole, 23-oblique gap.

1. double belljar stoker: formed by the manual coal mechanism of weight by two eclipsed circular shells and side system, interiorly hang two conical bell jars, play sealing, coal effect, prevent that coal gas from escaping.The connection of it and body of heater is to be fixed on the furnace roof with the flange on the lower housing, and lower housing partly stretches within the body of heater.

2. body of heater: body of heater is made up of furnace roof, housing, full water jacket samdwich, is supported on the basis by means of the suspension column of 3 shaped steel seam.

Uniform six fire exploring holes in furnace roof top are for surveying the bed of material and processing ash erosion use in the stove.The furnace roof bottom is welded with one group of coal distributing device, makes coal charge evenly enter the bed of material, keeps the bed of material smooth.The water jacket samdwich of body of heater plays cooling effect, and water-in is arranged at the bottom, and top does not have the steam water interface outlet, imports and exports all to link to each other with elevated tank or drum, constitutes water circulation system.

Body of heater is provided with manhole, hand hole, mudhole and gas exit pore.The skirtboard of body of heater bottom stretches into following 300 millimeters of the water-bath of ash-pan, and its inboard is welded with oblique densely covered angle steel, constitutes the break plate.The outside is welded with 1 ash disposal plough.

3. grate: the first layer grate is a blast cap, comprises blast cap layer, grate layer, base (also claiming bellows), all adopts welding process to pass through mutually with cloth solar or lunar halo, is fixed on the base, and base is fixed on the ash-pan, and ash-pan is fixed on the worm gear, and worm gear is bearing on the support roller.Therefore grate can be executed commentaries on classics with ash-pan under power wheel drive.Grate and base outer surface are respectively equipped with ash discharge muscle, break cutter, break awl, gray moving cutter.When operation is revolved in commentaries on classics, can successfully be displaced into lime-ash the outer zone of ash-pan bottom, automatically lime-ash is discharged out of the furnace through immobilized ash disposal plough.The main effect of grate is the supporting bed of material, removes lime-ash, and vaporized chemical is evenly entered in the stove, guarantees normally gasification.See Fig. 3, Fig. 4 for details.

4. mixing tank: adopt the venturi tube principle to make air and water vapor uniform mixing.It is rolled, is welded by steel plate, and two inlets are arranged, and an outlet is attached at flange on the airduct road of furnace bottom.See Fig. 1, Fig. 2 for details.

5. transmission mechanism: ash-pan and grate drive its rotation by transmission mechanism.Be installed in power that the electric motor of furnace bottom produces through speed reduction unit, eccentric disc, connecting rod, ratchet, support tooth greatly and drive worm and worm wheel, ash-pan, grate and worm gear are rotated synchronously.By adjusting the eccentricity of eccentric disc, can make ash-pan, grate obtain different rotating speeds.

6. cleaning apparatus: be made up of housing, central dividing plate, water sealed tank, the dust that heating gas is carried secretly obtains removing through sedimentation.It connects with the gas furnace outlet mutually by pipeline.

This equipment and fat coal, coke gasification equipment are different.Be high water content (up to 25%), the ash-rich (reaching 49%) of adaptation low grade coal, ash fusion point low (≤1180 ℃), characteristics such as fugitive constituent 〉=50%, the main difference part of its equipment is:

1. grate part: grate is the most critical position of producer gas generator, and can its structure, form greatly influence the coal gasification process and normally carry out.This equipment is on the basis of tower grate, for strengthening ash disposal, dreg-breaking performance, make vaporized chemical evenly enter burner hearth, we at 90 °～105 °, form the grate taper design by five layers, pass through each layer fixing mutually with the cloth solar or lunar halo of solely establishing, each layer is provided with the ash discharge muscle, not only be convenient to lime-ash and under action of gravity, discharge smoothly, and make vaporized chemical even, prevent that simultaneously lime-ash from entering grate inside along the vertical and section of burner hearth cloth wind of grate.Low for solving ash fusion point, easy slagging scorification piece influences the problem of gasification operating mode in the stove under the high temperature, go up the conical surface at grate base (bellows) and be provided with eight curved face type break cuttves, 3 powerful break awls and 3 are set the gray moving cutter of oblique rotation in its side, this is that domestic and international same category of device is unexistent.

2. the oblique densely covered break circle of body of heater skirt is complementary with break cutter, the break awl of furnace base, and big cinder block is discharged out of the furnace smoothly, and this also is only structure design.(see Fig. 1, Fig. 3)

3. initiate duct type vaporized chemical mixing tank, made air and water vapor carry out external mix going into the stokehold, improved the gasification efficiency of stove.(see figure 2)

4. the furnace roof coal distributing device adopts the coal distributing device of novel ladder type board structure, forms oblique seam gland, makes feed coal enter the bed of material in the stove more equably, makes the bed of material smooth.

Original coal distributing device structure is a rectangle, and the slit is vertical between plate, cloth coal effect not as oblique evenly.Also be initiative.Totally 8 of coal distributing devices.

5. improved the structure design of double belljar.Have the coal controlling organization of weight in side arrangement, simultaneously, the lower inverted bell housing parts stretches into body of heater and absorbs furnace heat, makes the more feed coal of water content give drying in the bell jar housing, helps the gasification behind the stove.

Claims (2)

1, a kind of low grade coal producer gas generator, it is characterized in that above body of heater, being equipped with the double belljar stoker, form by the manual coal mechanism of weight by two eclipsed circular shells and side system, interior outstanding two conical bell jars, body of heater is by furnace roof, housing, full water jacket samdwich is formed, be welded with three below and be supported on ground leg, the furnace roof bottom is welded with one group of coal distributing device, water-in is arranged at the body of heater bottom, the steam water interface outlet is arranged at top, also is provided with the gas exit pore, and the skirtboard of body of heater bottom stretches in the ash-pan, its inboard is welded with oblique densely covered angle steel, constitute the break plate, the outside is welded with 1 ash disposal plough, and grate comprises the blast cap layer, the grate layer, base, all be welded as a whole and pass through mutually with cloth solar or lunar halo, because of fixing on the base, base is fixed on the ash-pan, and ash-pan is fixed on the worm gear, links to each other with motor through transmission mechanism, grate and base outer surface are respectively equipped with the ash discharge muscle, the break cutter, the break awl, the gray moving cutter is equipped with airduct in the bottom.

2, low grade coal producer gas generator according to claim 1 is characterized in that being connected with the mixing tank that adopts venturi principle to make in a side of airduct.

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