CN206905564U

CN206905564U - Electric stove dust flue gas shunting device

Info

Publication number: CN206905564U
Application number: CN201720461755.0U
Authority: CN
Inventors: 尹华勤
Original assignee: Wuxi Xuelang Environmental Technology Co Ltd
Current assignee: Wuxi Xuelang Environmental Technology Co Ltd
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2018-01-19
Anticipated expiration: 2027-04-28

Abstract

The utility model provides electric stove dust flue gas shunting device, not only meet that CO caused by oxygen blast of electric furnace smelting is fully burned, and can effectively solve the problems, such as that excessive cleaner and pipeline must be used, material usage is reduced, reduces investment cost and operation energy consumption；Electric furnace including setting gradually connection, smoke exhaust pipe in stove, first water-cooled flue, combustion settling chamber, second water-cooled flue, air cooler, booster fan, sack cleaner, dedusting fan, chimney, roof cover is arranged above electric furnace, and the outlet connection of the in line mouth and booster fan of roof cover, it also includes sleeve pipe, shunt conveying fan, connected after the diffluence pass connection shunting conveying fan of roof cover with sleeve pipe, sleeve pipe is set in smoke exhaust pipe outlet end in stove, and internal surface of sleeve pipe leaves space with smoke exhaust pipe outlet section outer wall in stove, smoke exhaust pipe closed front connects in the entrance point and stove of sleeve pipe, sleeve pipe, import of the outlet of smoke exhaust pipe with the first water-cooled flue is oppositely arranged in stove.

Description

Electric stove dust flue gas shunting device

Technical field

It the utility model is related to energy-conserving and environment-protective technical fiel, specially electric stove dust flue gas shunting device.

Background technology

In existing Electric-arc Furnaces Dedust System in Steelworks, the main electric furnace including setting gradually connection, smoke exhaust pipe, water cooling cigarette in stove Road, combustion settling chamber, air cooler, booster fan, sack cleaner, dedusting fan, chimney, electric furnace produce in charging, tapping Flue gas mainly trapped by being arranged at roof cover above electric furnace, then filtered using sack cleaner, the gas after filtering by Blowdown stack is discharged into air；Electric furnace contains CO flue gases in high temperature caused by oxygen blast smelting and mainly arranged by smoke exhaust pipe in stove simultaneously Go out, being mixed into air using the space in stove between smoke exhaust pipe and water-cooled flue is burnt, again through supercooling and roof after burning The secondary flue gas mixing of cover trapping discharge, is then filtered, the gas after filtering is discharged into greatly by blowdown stack using sack cleaner Gas；In the entirely steel-making cycle, the oxygen blast duration of heat is most long, accounts for for 3/5 ~ 4/5 time, needs persistently to be mixed into substantial amounts of sky therebetween Gas, so that caused CO is fully burned, then dust pelletizing system in order to handling the flue gas that electric furnace distributes in a long time Outside, mixed large quantity of air is also accommodated, then dust pelletizing system must use excessive cleaner and pipeline, also with regard to needing to disappear Substantial amounts of material is consumed, investment cost and operation energy consumption are all higher.

The content of the invention

In view of the above-mentioned problems, the utility model provides electric stove dust flue gas shunting device, it can not only meet electric furnace CO caused by oxygen blast smelting is fully burned, and can effectively solve the problems, such as that excessive cleaner and pipeline must be used, and subtracts Few material usage, reduces investment cost and operation energy consumption.

Its technical scheme is such：It include setting gradually the electric furnace of connection, smoke exhaust pipe in stove, the first water-cooled flue, Combustion settling chamber, the second water-cooled flue, air cooler, booster fan, sack cleaner, dedusting fan, chimney, roof cover are arranged at Above the electric furnace, and the in line mouth of the roof cover is connected with the outlet of the booster fan, it is characterised in that it is also Including sleeve pipe, shunting conveying fan, connected after the diffluence pass connection shunting conveying fan of the roof cover with described sleeve pipe, Described sleeve pipe is set in smoke exhaust pipe outlet end in the stove, and described sleeve pipe inwall and smoke exhaust pipe outlet section outer wall in the stove Space is left, the entrance point of described sleeve pipe is connected with smoke exhaust pipe closed front in the stove, and smoke exhaust pipe goes out in described sleeve pipe, stove Import of the mouth with first water-cooled flue is oppositely arranged.

It is further characterized by, the outlet of smoke exhaust pipe and the import phase of first water-cooled flue in described sleeve pipe, stove It is 50mm ~ 200mm to adjust the distance.

The beneficial effects of the utility model are that, by setting up sleeve pipe, shunting conveying fan in existing dust pelletizing system, can have The flue gas of effect shunting roof cover trapping, i.e. the electric furnace flue gas part of roof cover trapping can be sent by diffluence pass by shunting conveying fan Enter sleeve pipe, internal surface of sleeve pipe leaves space with smoke exhaust pipe outlet section outer wall in stove, and the flue gas of shunting conveying fan conveying is via the sky Gap is discharged, and is subsequently entered the first water-cooled flue with the flue gas that smoke exhaust pipe in stove is discharged and mixed, and is then entered in combustion settling chamber Row fully burning, coarse granule flue dust are settled, can shape by shunting conveying fan between cannula exit and the first water-cooled flue Into one layer of air curtain, the entrance of air can be stopped, instead of existing air and inner flue gas of the stove mixed combustion, so as to meet CO caused by oxygen blast of electric furnace smelting is fully burned, and can greatly reduce the exhaust gas volumn into sack cleaner, dedusting fan, Make sack cleaner filter area and volume reduces, dedusting fan flow and electric power reduce, reduce dust pelletizing system and remove The scale of dirt equipment, and because dedusting fan flow-reduction, the electric energy of dedusting fan reduction are far longer than shunting conveying The electric energy of blower fan consumption, because volume or length reduce, the use of electric energy is also accordingly reduced the other electrical equipments of dust pelletizing system, from And ensure that dust pelletizing system is run under low discharge, low energy consumption, investment and operating cost have been saved, has improved economic benefit and society Can benefit.

Brief description of the drawings

Fig. 1 is schematic flow sheet of the present utility model；

Fig. 2 is the partial enlargement structural representation that sleeve pipe is connected with smoke exhaust pipe in stove.

Embodiment

As shown in Figure 1 and Figure 2, the utility model include by pipeline 6 set gradually the electric furnace 1 of connection, smoke exhaust pipe 2 in stove, First water-cooled flue 4, combustion settling chamber 5, the second water-cooled flue 14, air cooler 7, booster fan 8, sack cleaner 11, dedusting Blower fan 12, chimney 13, roof cover 9 is arranged at the top of electric furnace 1, and the outlet of the in line mouth and booster fan of roof cover connects Connect, smoke exhaust pipe 2, sleeve pipe 3, the first water-cooled flue 4, the material of the second water-cooled flue 14 are steel pipe in stove；Smoke exhaust pipe 2 enters in stove Mouth end is connected with the bell of electric furnace 1；Combustion settling chamber 5 is cuboid or cylindrical structure, and internally flue gas can fully burn, slightly Particle dust is settled；Air cooler 7 mainly cools down to the flue gas being passed through；Booster fan 8 is the stream of smoke discharging in electric furnace Dynamic increase power, the import of booster fan 8 are connected by pipeline 6 and the outlet of air cooler 7, export pass through pipeline 6 respectively with roof cover 9 In line mouth, the import of sack cleaner 11 are connected；The housing of roof cover 9 is frustum structure, and main function is the trapping secondary fume of electric furnace 1 Gas, roof cover 9 are arranged in the top factory roof of electric furnace 1, and cover mouth is downward, and its diffluence pass passes through pipeline 6 and shunting conveying fan 10 imports are connected；Shunting conveying fan 10 is that the formation for setting up flow of flue gas in flue gas shunting transfer pipeline and air curtain is provided and moved Power, shunting conveying fan 10 are arranged between roof cover 9 and sleeve pipe 3, and its import and export is shunted with roof cover 9 respectively by pipeline 6 Mouth, the import of sleeve pipe 3 are connected；The shell of sack cleaner 11 is body structure, is internally provided with filter bag, and flue gas can be removed Dirt；Dedusting fan 12 provides power for the flowing of system flue gas.

The utility model also includes sleeve pipe 3, shunting conveying fan 10, the diffluence pass connection shunting conveying fan of roof cover 9 Connected after 10 with sleeve pipe 3, sleeve pipe 3 is set in the outlet end of smoke exhaust pipe 2 in stove, and the inwall of sleeve pipe 3 and the outlet section of smoke exhaust pipe 2 in stove Outer wall leaves space, the closed front of smoke exhaust pipe 2 connection in the entrance point and stove of sleeve pipe 3, smoke exhaust pipe 2 in the outlet of sleeve pipe 3, stove The import with the first water-cooled flue 4 is exported to be oppositely arranged；The outlet of smoke exhaust pipe 2 and the first water cooling cigarette in the outlet of sleeve pipe 3, stove The import relative distance in road 4 is 120mm.

The course of work of the present utility model is：（1）, electric furnace 1 charging, tapping caused by flue gas, from bottom to top towards room The direction of overhead guard 9 rises and trapped by roof cover 9, and the flue gas after trapping is filtered by pipeline 6 into sack cleaner 11, is reached Chimney 13 is sent into after mark by dedusting fan 12 to discharge；

（2）, electric furnace 1 first and second flue gas is produced when oxygen blast is smelted, secondary flue gas is trapped by roof cover 9, the cigarette after trapping Qi leel is into two parts：A part is discharged by 9 in line mouth of roof cover, is mixed by pipeline 6 with the flue gas to come from booster fan 8 Close；Another part is discharged by the diffluence pass of roof cover 9, and sleeve pipe 3 is sent into by shunting conveying fan 10 by pipeline 6, internal surface of sleeve pipe with Smoke exhaust pipe outlet section outer wall leaves space in stove, and the flue gas that shunting conveying fan 10 conveys is discharged via the space, and with stove Flue gas of smoke exhaust pipe discharge subsequently enters the first water-cooled flue 4 and mixed, while in the outlet of sleeve pipe 3 and the first water-cooled flue 4 Between formed one layer of air curtain, the entrance of air can be stopped, then fully burnt in combustion settling chamber 5, coarse granule cigarette Dirt is settled, and flue gas carries out cooling indirectly with cooling water in the second water-cooled flue 14, temperature reduces；Flue gas passes through afterwards Pipeline 6 is further cooled down into air cooler 7, is discharged after cooling with 9 in line mouth of roof cover by booster fan 8, pipeline 6 secondary Flue gas is mixed, and then mixed flue gas is filtered by pipeline 6 into sack cleaner 11, is sent into after up to standard by dedusting fan 12 Chimney 13 is discharged, and the flue dust except under is periodically discharged.

Claims

1. electric stove dust flue gas shunting device, it includes setting gradually the electric furnace of connection, smoke exhaust pipe, the first water cooling cigarette in stove Road, combustion settling chamber, the second water-cooled flue, air cooler, booster fan, sack cleaner, dedusting fan, chimney, roof cover are set It is placed in above the electric furnace, and the in line mouth of the roof cover is connected with the outlet of the booster fan, it is characterised in that Its also include sleeve pipe, shunting conveying fan, the roof cover diffluence pass connection it is described shunting conveying fan after with described sleeve pipe Connection, described sleeve pipe is set in smoke exhaust pipe outlet end in the stove, and described sleeve pipe inwall exports with smoke exhaust pipe in the stove Section outer wall leaves space, and the entrance point of described sleeve pipe is connected with smoke exhaust pipe closed front in the stove, is discharged fume in described sleeve pipe, stove Import of the outlet of pipe with first water-cooled flue is oppositely arranged.

2. electric stove dust according to claim 1 flue gas shunting device, it is characterised in that discharged fume in described sleeve pipe, stove The outlet of pipe and the import relative distance of first water-cooled flue are 50mm ~ 200mm.