CN2228080Y - Down-draft pressure-control self-combustible coke oven - Google Patents

Abstract

The utility model relates to a down-draft pressure-control self-combustible coke oven, which is an industrial oven which can pyrolyze coals and produce semi-cokes, tar oil and coal gas. The utility model has the technical proposal that the coke oven is provided with a furnace shell (4), the bottom part of the furnace shell (4) is provided with a coke extracting disk (10), a tower water jacket furnace grate is arranged on the coke extracting disk (10) in the furnace shell (4), the outer wall of the furnace shell (4) is provided with a ring type air supply pipe (7), and the top part of the furnace shell (4) is provided with a double bell jar coal feeder (1). The utility model has the advantages of uniform air distribution, loosening coal, easy falling, detectable working condition in the furnace, explosion protection, etc.

Description

The voltage-controlled self-burning type pit kiln of air draught

The utility model relates to pit kiln, is the industrial furnace that the pyrolysis coal produces semicoke carbon, tar and coal gas in a kind of Coal Chemical Industry.

The present round vertical serialization pyrolysis of coal stove that uses, blast pipe is set up at the center of furnace bottom, gives off several arms on the air intake standpipe, and airduct is motionless, this structure exists cloth wind inequality, the shortcoming that burning is uneven, furnace temperature is difficult for improving, the pyrolysis difficulty, and semicoke output does not reach design requirements.Because place, air port local temperature is too high, is prone to slag, blocks the air port.Because round vertical serialization pyrolysis of coal stove, also there is other deficiency on the structure, thereby also causes such as coal tar whereabouts deflection in the stove, stove can not normally move; During coal, coal is easily broken, and the broken coal ratio that enters in the stove is increased, and ventilation property is poor in the stove, and burnt quality and output are all reduced; Bed of material height in the positive pressure operation, stove, resistance be big, when pressure of blast is low, air quantity is not enough, when pressure of blast is high, the too high easy generation slag of air port place's temperature, during power failure, coal gas flows backward to the airduct road in the stove, cause detonation, easily cause equipment pipe to damage when serious, adverse consequencess such as danger utmost point personnel safety.

The purpose of this utility model is: a kind of air draught type is provided, controls by regulating pressure, the flammable composition of part in the coal combustion, so that thermophore to be provided, realize the pit kiln of pyrolysis of coal, make its have wind distributing face long-pending big, cloth wind is even, the part of the body cavity below the umbilicus, housing the bladder, kidneys and bowels is even, adjustable, the natural air feed in coal seam, inner operating such as can visit at advantage in the stove.

The technical solution of the utility model is: pit kiln has furnace shell (4), the dish (10) that discharges of the coke is installed in furnace shell (4) bottom, the dish (10) that discharges of the coke is gone up, the interior turriform water jacket fire grate (6) of installing of furnace shell (4), annular blast tube (7) is installed on furnace shell (4) outer wall, blast tube (7) communicates with blast pipe (25) and (26), and double belljar stoker (1) is installed at furnace shell (4) top.Turriform water jacket fire grate (6) bottom is installed air intake and is responsible for (14), and turriform water jacket fire grate (6) has three layers, uniform water-jacket typ spirrillum coke pushing floor (5) on every layer of fire grate.Discharge of the coke and be furnished with spirrillum coke pushing floor (18) on the inner cone of dish (10).The recirculated water of turriform water jacket fire grate (6), be by the jet pipe (15) that is installed in fire grate (6) center, water is sprayed into fire grate (6) through being installed in the communicating pipe (28) between every layer of fire grate, inflow is installed in the water sealed tank (27) of fire grate bottom, and the return water pipe (16) through water sealed tank (27) bottom flows out then.

Description of drawings: accompanying drawing one is a structural representation of the present utility model;

Accompanying drawing two is A-A sectional views in the accompanying drawing one; Accompanying drawing three is B-B amplification views in the accompanying drawing one; Accompanying drawing four is C-C amplification profiles in the accompanying drawing 1, and accompanying drawing five is the enlarged views of (22) in the accompanying drawing, and structure is visited in main signal.

The contrast accompanying drawing is described further embodiment of the present utility model:

(4) are furnace shells among the figure, and the dish (10) that discharges of the coke is installed in the bottom of furnace shell (4), and transmission bull gear (12) is installed in the bottom of the dish (10) that discharges of the coke.The dish (10) that discharges of the coke is gone up, the interior turriform water jacket fire grate (6) of installing of furnace shell (4), and turriform water jacket fire grate (6) divides three layers, and there is lid (24) on the top, and fire grate (6) is gone up uniform water-jacket typ spirrillum coke pushing floor (5), structure shown in accompanying drawing four for every layer.The centre of fire grate (6) is installed air intake and is responsible for (14), and air intake is installed water jet standpipe (15) in the middle of being responsible for (14), and water jet standpipe (15) sprays into fire grate (6) with water, to reach the purpose of cooling fire grate (6).Water is by fire grate and be installed in and flow into water sealed tank (27) communicating pipe (28) between each layer fire grate (6), and the recovery tube (16) of passing through water sealed tank (27) bottom again flows out, and the top of water sealed tank (27) is provided with upflow tube (17).Annular blast tube (7) is installed on the outer wall of furnace shell (4), blast tube (7) communicates with blast pipe (25) and (26), blast inlet on the furnace shell (4) is fan-shaped herein, as shown in Figure 3, door closure (9) all is set on blast pipe (25) and (26), double belljar stoker (1) is installed on the top of furnace shell (4), and every place bell jar one side is all installed cylinder (2), and the opposite side of bottom bell jar is installed filling pipe (23).The utility model working process is: coal adds in the upper inverted bell of people's double belljar stoker (1), cylinder (2) promotes upper inverted bell makes coal fall into lower inverted bell, and upper inverted bell recovers detent position then, afterwards, lower inverted bell one side cylinder promotes lower inverted bell falls in the furnace shell (4) coal, finishes the coal action.The cylinder of two coal operations is interlocked, and Hou Jun has a bell jar to be in detent position when any.The upper surface in coal seam keeps about 1 meter apart from bell (3) in the stove, forms dead level (gas-bearing formation), from the wind that undergrate blast pipe (14) enters, sends in the fire grate (6) through air intake arm (13), enters in the stove by each annular tuyere between fire grate then.General stove internal combustion layer temperature is controlled at about 800 ℃, and fire grate (6) all is with water jacket, is cooled off, and avoids scaling loss.Cooling circulating water is sprayed onto on the fire grate of top by water pipe (15), and top cover (24) is avoided water is sprayed in the stove, and water flows into water sealed tank (27) through fire grate (6), communicating pipe (28).The upper end cover of the blast pipe (14) that install fire grate (6) bottom covers air intake arm (13), and the water that anti-antipriming pipe (15) sprays seals in the airduct.In the time of undergrate blast, another transportation work style enters in the stove through annular air supply pipe (7), arm (8) and blast pipe (25), (26).Because furnace roof portion dead level is in negative pressure condition, thereby the door closure (9) that can open at any time on blast pipe (25), (26) is observed inner operating.During valve on closing arm (8), open door closure (9) and reach the purpose that relies on natural ventilation coking.After coal added in the stove, turriform water jacket fire grate (6) was by dish (10) driven rotary of the discharging of the coke, and the floor (18) of dish (10) of the discharging of the coke and the floor (5) on the fire grate (6) promote coal tar and fall.Because the floor (5) on the fire grate (6) is in fire bed, so floor (5) is made jacket structure for water, is communicated with fire grate (6) water jacket by a plurality of holes (Φ), shown in figure four.Discharge of the coke dish (10) the inside fills mobile water, can play quenching effect, water seal effect and Jiao is suspended in water, and has increased flowability, and the resistance that discharges of the coke reduces greatly.Fall into Jiao in the dish (10) that discharges of the coke, by fixed discharge of the coke for a short time cutter (11) with Jiao shovel to the dish (10) that discharges of the coke, translate into by Jiao's plough (19) again and be installed on the outer transfer roller of the dish (10) that discharges of the coke, structure shown in figure two, the coal seam dropping process is steady in the body of heater, be cutter (11) the adjustment coal seam of the discharging of the coke for a short time, the major parts that it is steadily fallen.When the utility model normally moves, can pass through spy hole (22) at any time and visit inner operating.Visit structure shown in figure five,,, need often by filling pipe (23) make up water so must guarantee that air can not enter the furnace roof dead level because the furnace roof dead level is a negative pressure.When needing to visit, open the valve on the vapour pipe (C), steam enters the injector that is made of cover plate (a) and baffle plate (b) and forms packing, opens lid (d) again, to reach the purpose of visiting.Another effect of lid (d) is explosion-proof, and when detonation occurring, lid (d) is backed down earlier pressure release, with the protection body of heater.(20) are gas exits among the figure, and (21) are vapour pipes.

The utility model is owing to be provided with furnace bottom and furnace side face air intake and the rotatable structure of fire grate, thereby and have cloth wind even, coal can become flexible, fall easily, generally do not form slagging scorification, broken advantage is also easily taken off in indivedual slagging scorification, the cutter (11) owing to discharge of the coke for a short time, can adjust width, angle, can adjust the coal seam so have, make coal seam advantage stably, owing to be provided with spy hole to reach, has the advantage that to grasp inner operating at any time, the spy hole of furnace roof also has explosion-proof, owing to utilize the double belljar coal, so have good airproof performance, and broken coal easily drops to minimum advantage.

Claims (8)

1, the voltage-controlled self-burning type pit kiln of air draught, it has furnace shell (4), it is characterized in that: the dish (10) that discharges of the coke is installed in furnace shell (4) bottom, the dish (10) that discharges of the coke is gone up, the interior turriform water jacket fire grate (10) of installing of furnace shell (4), annular blast tube (7) is installed on furnace shell (4) outer wall, and double belljar stoker (1) is installed at furnace shell (4) top.

2, according to the voltage-controlled self-burning type pit kiln of the described air draught of claim 1, it is characterized in that: turriform water jacket fire grate (6) bottom is installed air intake and is responsible for (14).

3, according to the voltage-controlled self-burning type pit kiln of the described air draught of claim 1, it is characterized in that: be furnished with spirrillum coke pushing floor (18) on the inner cone of dish (10) of the discharging of the coke.

4, according to the voltage-controlled self-burning type pit kiln of the described air draught of claim 1, it is characterized in that: turriform water jacket fire grate (6) has three layers, is evenly equipped with water-jacket typ spirrillum coke pushing floor (5) on every layer of fire grate.

5, according to the voltage-controlled self-burning type pit kiln of the described air draught of claim 1, it is characterized in that: blast pipe (25) and (26) that communicate with annular air supply pipe (7) are installed on furnace shell (4) outer wall.

6, according to the voltage-controlled self-burning type pit kiln of the described air draught of claim 1, it is characterized in that: the recirculated water of turriform water jacket fire grate (6) is by the jet pipe (15) that is installed in fire grate (6) center, water is sprayed into fire grate (6) through being installed in the water sealed tank (27) be installed in the fire grate bottom that flows into communicating pipe (28) between every layer of fire grate, and the return water pipe (16) through water sealed tank (27) bottom flows out then.

7, according to the voltage-controlled self-burning type pit kiln of the described air draught of claim 1, it is characterized in that: furnace shell (4) end face bell (3) is gone up spy hole (22) is installed.

8, according to the voltage-controlled self-burning type pit kiln of the described air draught of claim 1, it is characterized in that: cutter (11) for a short time discharges of the coke in installation accent coal seam, furnace shell (4) bottom.

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