CN201268710Y - Fume extractor of gas heating type ferrous powder refining reducing belt furnace - Google Patents

Abstract

The utility model discloses a smoke discharge device for a gas heating type iron powder precise reduction draper-type furnace, which has simple structure, is easy to realize the sufficient utilization of combustion waste heat, avoids wasting the energy resource, improves the high-temperature state of an operation environment, lower the labor intensity, prolongs the service life of a smoke discharge pipe and an smoke discharge draught fan, can effectively enhance the utility ratio of the gas, and the like. The smoke discharge device comprises a reduction furnace which is provided with a plurality of smoke discharge holes, other smoke discharge holes except a furnace tail smoke discharge hole and a furnace head smoke discharge hole arranged on the reduction furnace are closed by a smoke discharge hole blocking device, and the smoke discharge pipeline is only provided with a smoke gas collection opening which is matched with the furnace tail smoke discharge hole and the furnace head smoke discharge hole.

Description

The smart reduction of coal gas heating-type iron powder belt fire grate cigarette device

Technical field

The utility model relates to a kind of reduction furnace fume extractor, the particularly a kind of smart reduction of coal gas heating-type iron powder belt fire grate cigarette device that is applicable to powder metallurgy production line.

Background technology

Produce in the powder metallurgy production of iron powder in the solid carbon reduction method, generally adopt iron scale and reductive agent tinning, sending into tunnel furnace by kiln car once reduces, carry out the smart reduction of secondary by reduction furnace again after the sponge iron fragmentation of being produced, so that the abundant decarburization of reduced iron powder, deoxidation, desulfurization improve its iron level, eliminate the work hardening of sponge iron in crushing process simultaneously, to improve its plasticity, change the compression performance of iron powder.The most extensive, the most practical band oven of present domestic use generally adopts electricity, coal gas, oil heating, the heating means of the smart reduction of coal gas heating-type iron powder band oven are: in the band oven heating zone, burner in the cross arrangement of stove both sides, the corresponding combustion chamber of each burner, flame horse not below the burning, burner hearth bottom is built into many buttresses by refractory brick, the SiC plate is placed on the buttress, horse not lies on the SiC plate, can slide on the SiC plate during expanded by heating.Roof of the furnace is with the insulation of multi-layer fiber felt, and has a plurality of venting holes (4-5, even more, below statement is an example with 5) burning residual air is discharged from the top, sees Fig. 1.The deficiency of this fume extractor is: (1) burning residual air is directly discharged, and causes the interior upper and lower temperature difference of burner hearth big, has a strong impact on the reduced iron powder quality; (2) burning residual air is directly discharged, and the coal gas thermal source can not make full use of and cause energy dissipation serious; (3) burning residual air is directly discharged, because of its high temperature causes the smoke discharging pipe and the smoke exhaust fan lost of life and burns the normal operation that causes production interruption, the hyperthermia radiation of smoke discharging pipe can cause the temperature of Working environment to raise and influence automatic control system; (4) burning residual air is directly discharged, and its hyperthermia radiation heat can be damaged test sets such as furnace roof thermopair; (5) burning residual air is directly discharged, and can cause stove interior temperature control difficulty and influence the reduced iron powder quality.At present, in order to improve iron powder quality and fume extractor life-span, much more general adopt the old worker's temperature adjustment that makes full use of skilled operation transfer fire so that coal gas fully burn and reduce furnace pressure prolong heat energy in stove residence time and smoke discharging pipe carried out heat insulation protection and thickening is reinforced, smoke exhaust fan is carried out air-cooled measure solved, the weak point of these measures is: strict to operator is difficult for realizing production management, control; Require high to automatic control system and test set, cause production cost to raise, and these measures can not fundamentally improve energy dissipation and the high problem of operating ambient temperature, and the problem that the automatic control system failure rate is high and test set easily burns and the preheating of burning can not make full use of still can not solve.At present, Shang Weijian is used for the report of the smart reduction of coal gas heating-type iron powder belt fire grate cigarette appliance arrangement.

Summary of the invention

The purpose of this utility model is exactly in order to address the above problem, provide a kind of simple in structure, easily realize burner exhaust heat make full use of, avoid energy dissipation, improve operating environment high-temperature situation, reduce labour intensity, prolong smoke discharging pipe and smoke exhaust fan life-span, can effectively improve the smart reduction of the coal gas heating-type iron powder belt fire grate cigarette device of gas utilization rate.

For achieving the above object, the technical scheme that the utility model adopted is:

The smart reduction of a kind of coal gas heating-type iron powder belt fire grate cigarette device, it comprises reduction furnace, is provided with a plurality of exhaust smoke holes on reduction furnace, all the other each exhaust smoke holes on the described reduction furnace except that stove tail exhaust smoke hole and burner exhaust smoke hole are sealed by the exhaust smoke hole plugging device; Only be provided with the flue gas acquisition port that matches with stove tail exhaust smoke hole and burner exhaust smoke hole on the smoke discharging pipe simultaneously.

The smart reduction of a kind of coal gas heating-type iron powder belt fire grate cigarette device, it comprises reduction furnace, on reduction furnace, be provided with a plurality of exhaust smoke holes, smoke discharging pipe is provided with the flue gas acquisition port that matches with each exhaust smoke hole, and all the other each exhaust smoke holes on the described reduction furnace except that stove tail exhaust smoke hole and burner exhaust smoke hole are sealed by the exhaust smoke hole plugging device; Simultaneously, on the described smoke discharging pipe except that with flue gas acquisition port that stove tail exhaust smoke hole and burner exhaust smoke hole match, all the other flue gas acquisition port adopt the sealing of smoke discharging pipe plugging devices.

Described each exhaust smoke hole plugging device comprises an operation handgrip that is positioned at the reduction furnace outside, and it is connected with circular bell steel plate, and the shape and the exhaust smoke hole of bell steel plate are corresponding; Be connected filling multilayer cellucotton between bell steel plate and Stainless Steel Band at the bell steel plate with Stainless Steel Band by a plurality of stainless steel bars.

Described each smoke discharging pipe plugging device is the circular arc steel plate, and it is identical with the radian of smoke discharging pipe, and external diameter is identical with the smoke discharging pipe internal diameter, and it and smoke discharging pipe weld, and its outside forms an integral body with the lagging material parcel and with smoke discharging pipe.

The utility model on original fume extractor basis (have 5 to be example explanation with exhaust smoke hole, its actual quantity should be the amount doesn't matter according to reduction furnace) go up envelope and fall two, three, four district's exhaust smoke holes, only keep one, five district's exhaust smoke holes (being stove tail and burner place).Two, three, four district's exhaust smoke hole plugging devices are made of circle shape multi-layer fiber felt, circle shape steel plate, remove two, three, four district's exhaust smoke holes earlier and be higher than the furnace roof part, described round shape steel plate external diameter is identical with the exhaust smoke hole internal diameter, one handgrip is arranged at steel plate top, be used for using when lifting or replacing fibrefelt, the steel plate bottom is welded with a plurality of stainless steel bars.When sealing, to justify shape multi-layer fiber felt earlier lifts and is welded on the stainless steel bar of round shape steel plate bottom with Stainless Steel Band, round shape steel plate external diameter is fully contacted with the exhaust smoke hole internal diameter and with its level after weld, described multi-layer fiber felt thickness is identical with the furnace roof fibrefelt, external diameter is more bigger than round shape steel plate, and the operation of two, three, four districts is identical.

In addition, envelope is fallen the flue gas acquisition port in two, three, four districts on the smoke discharging pipe, only keeps the flue gas acquisition port in one, five districts; Two, three, four flue gas acquisition port are removed the smoke discharging pipe convex part equally, form three ellipticity holes, adopt same material, the steel plate of same thickness also is processed into ellipticity, radian is identical with smoke discharging pipe and external diameter is identical with the smoke discharging pipe internal diameter, in ellipticity steel plate and fixing and welding after ellipticity hole on the smoke discharging pipe fully contacts and form a cambered surface, form an integral body with the lagging material parcel and with smoke discharging pipe then, two, three, four districts operate identical.

The beneficial effects of the utility model are: compare with the smart reduction of present coal gas heating-type iron powder belt fire grate cigarette device, greatly reduce upper and lower temperature difference in the burner hearth, make the throat temperature display instrument accurately show temperature in the stove, the strong temperature regulation that instructs, guarantee and raising reduced iron powder quality, make two simultaneously, three, four district's flue gases are clocklike to one, flow in five districts, the residence time of prolong smoke in stove, made full use of fume afterheat, the coal gas usage quantity reduces greatly, reduce labour intensity, increase work efficiency, funnel temperature reduces, overcome the operating ambient temperature height, automatic control system easy break-down and smoke discharging pipe, the problem that the smoke exhaust fan life-span is short, and working specification, the requirement that powder metallurgy is produced can be guaranteed, powder metallurgy production line can be widely used in.

Description of drawings

Fig. 1 is for transforming pre reduction producer gas burning back flue gas flow direction synoptic diagram;

Fig. 2 is a flue gas flow direction synoptic diagram after the reduction furnace gas-fired of transformation back;

Fig. 3 is an exhaust smoke hole plugging structure synoptic diagram;

Fig. 4 is a synoptic diagram after removal two, three, four district's flue gas acquisition port.

Wherein, 1. operate handgrip, 2. bell steel plate, 3. multi-layer fiber, 4. Stainless Steel Band, 5. stainless steel bar, 6. reduction furnace, 7. exhaust smoke hole, 8. smoke discharging pipe, 9. flue gas acquisition port.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Embodiment 1:

Among Fig. 2,3, having five venting holes 7 with reduction furnace 6 is the example explanation.

The smart reduction of this coal gas heating-type iron powder belt fire grate cigarette device is made of two exhaust smoke holes 7 of stove tail and burner, correspondingly two flue gas acquisition port 9 and smoke discharging pipe 8 and the smoke exhaust fan that is installed on the smoke discharging pipe 8.For on the reduction furnace 6 second and third, four district's exhaust smoke holes 7 adopt the exhaust smoke hole plugging devices, this device is made of circle shape multi-layer fiber 3, bell steel plate 2 (shown in Figure 3), remove two, three, four district's exhaust smoke holes 7 earlier and be higher than the furnace roof part, make round shape bell steel plate 2 external diameters identical then with exhaust smoke hole 7 internal diameters, one operation handgrip 1 is arranged at bell steel plate 2 tops, be used for using when lifting or replacing fibrefelt, bell steel plate 2 bottoms are welded with a plurality of stainless steel bars 5.When sealing, to justify shape multi-layer fiber 3 usefulness Stainless Steel Bands 4 earlier lifts and is welded on the stainless steel bar 5 of bell steel plate 2 bottoms, bell steel plate 2 external diameters are fully contacted with exhaust smoke hole 7 internal diameters and weld then with its level, multi-layer fiber 3 thickness are identical with the furnace roof fibrefelt, external diameter is more bigger than bell steel plate, and the operation of two, three, four districts is identical.Two flue gas acquisition port 9 only are set on the smoke discharging pipe 8, do not have other flue gas acquisition port 9.

Embodiment 2:

Among Fig. 4, having five venting holes 7 with reduction furnace 6 is the example explanation.

Smoke discharging pipe 8 is provided with a plurality of flue gas acquisition port 9, and the quantity of the exhaust smoke hole 7 on its quantity and the reduction furnace 6 is identical.For matching with reduction furnace 6, the flue gas acquisition port 9 that adopts the smoke discharging pipe plugging device to close two, three, four districts only keeps the flue gas acquisition port 9 of one, five districts (being burner and stove afterbody); Each smoke discharging pipe plugging device is the circular arc steel plate, and it is identical with the radian of smoke discharging pipe 8, and external diameter is identical with smoke discharging pipe 8 internal diameters, and it and smoke discharging pipe 8 weld, and its outside forms an integral body with the lagging material parcel and with smoke discharging pipe.Identical among all the other structures and the embodiment 1, repeat no more.

Claims (4)

1. the smart reduction of coal gas heating-type iron powder belt fire grate cigarette device, it comprises reduction furnace, be provided with a plurality of exhaust smoke holes on reduction furnace, it is characterized in that, all the other each exhaust smoke holes on the described reduction furnace except that stove tail exhaust smoke hole and burner exhaust smoke hole are sealed by the exhaust smoke hole plugging device; Only be provided with the flue gas acquisition port that matches with stove tail exhaust smoke hole and burner exhaust smoke hole on the smoke discharging pipe simultaneously.

2. the smart reduction of coal gas heating-type iron powder belt fire grate cigarette device, it comprises reduction furnace, on reduction furnace, be provided with a plurality of exhaust smoke holes, smoke discharging pipe is provided with the flue gas acquisition port that matches with each exhaust smoke hole, it is characterized in that all the other each exhaust smoke holes on the described reduction furnace except that stove tail exhaust smoke hole and burner exhaust smoke hole are sealed by the exhaust smoke hole plugging device; Simultaneously, on the described smoke discharging pipe except that with flue gas acquisition port that stove tail exhaust smoke hole and burner exhaust smoke hole match, all the other flue gas acquisition port adopt the sealing of smoke discharging pipe plugging devices.

3. the smart reduction of coal gas heating-type iron powder as claimed in claim 1 or 2 belt fire grate cigarette device, it is characterized in that, described each exhaust smoke hole plugging device comprises an operation handgrip that is positioned at the reduction furnace outside, and it is connected with circular bell steel plate, and the shape and the exhaust smoke hole of bell steel plate are corresponding; Be connected filling multilayer cellucotton between bell steel plate and Stainless Steel Band at the bell steel plate with Stainless Steel Band by a plurality of stainless steel bars.

4. the smart reduction of coal gas heating-type iron powder as claimed in claim 2 belt fire grate cigarette device, it is characterized in that, described each smoke discharging pipe plugging device is the circular arc steel plate, it is identical with the radian of smoke discharging pipe, and external diameter is identical with the smoke discharging pipe internal diameter, it and smoke discharging pipe weld, and its outside forms an integral body with the lagging material parcel and with smoke discharging pipe.

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