CN209405951U

CN209405951U - A kind of back-fire relief cooling dedusting auxiliary device for bag filter

Info

Publication number: CN209405951U
Application number: CN201822008676.1U
Authority: CN
Inventors: 李林山; 李明福; 李传宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2019-09-20
Anticipated expiration: 2028-11-23

Abstract

The utility model discloses a kind of back-fire relief cooling dedusting auxiliary device for bag filter, in the air inlet pipeline for three-phase ac electric arc furnace bag filter, it is made of whirlwind storehouse, cooler, ash bucket three parts.Including blast pipe, bulkhead, upper cover, cooler wall, upper face plate, lower face plate, fume pipe, air blast cooling or forced water-cooling cooler, ash bucket, cinder-discharging port, discharge pipe.It can make the particulate matter with high temperature under the action of the centrifugal force, by hitting bottom of the bulkhead from marginal deposit to ash bucket, it is discharged convenient for particulate matter, while using Forced water cooling or air blast cooling mode, flue gas tube heat exchange is cooled down, the dusty gas temperature into deduster is made to meet cloth bag performance requirement.The apparatus structure is simple, low cost, has back-fire relief, cooling, dedusting function, has ideal effect for improving bag filter efficiency of dust collection and extending the service life of cloth bag.

Description

A kind of back-fire relief cooling dedusting auxiliary device for bag filter

Technical field

The utility model relates to the dedusting of electric arc furnace smelting equipment, in particular to a kind of back-fire relief for bag filter drops Warm dedusting auxiliary device.

Background technique

The refractory materials such as fused magnesite or corundum are usually made by three-phase ac electric arc furnace melting.Its technical process is with three The be powered electric arc to be formed and electrode resistance of phase carbon pole is high temperature heat source, manipulates production process by material submerged arc mode, electricity Pole lower end forms material molten bath, and the layer-by-layer cloth in top in molten bath will remain certain thickness material bed, molten bath top It is material bed that preheating, decomposition, melting are sequentially completed under high temperature action, until the entire molten formation to stick together.Since material is preheating, is dividing In solution preocess, a large amount of carbon dioxide gas can be generated, air bag can be formed in electrode tip, the size of air bag affects electric current Variation is usually controlled by promoting or declining electrode.When cloth is not uniform enough in furnace, the bed of material has Bao Youhou, three-phase electrode When electric current, voltage not enough balance, material is breathed freely bad, and air bag can be made excessive, and if material collapses suddenly, it is existing just to will appear " spray furnace " As.Bulk gas can enter ventilation duct by dust gathering arrester entrainment of the high-temperature material particle for burning red with high speed when spraying furnace Road enters in deduster.The common cloth bag that deduster uses, nominal temperature is at 100 DEG C or so, high temperature resistant cloth bag such as " U.S. tower This ", the nominal temperatures such as " fluorine beauty this " be 180 DEG C -200 DEG C, instantaneous temperature is 250 DEG C, and actually sprays the red granules of furnace entrainment Temperature is up to 500 DEG C or more, once entering in deduster, cloth bag scald will be made impaired, influence dust removing effects, needed often Cloth bag is replaced, deduster use cost is increased.Therefore, the measure taken first is that by deduster and electric arc furnaces keep it is enough away from From reducing the temperature of high-temperature particle object and high-temperature flue gas with sufficiently long connecting line, cause cleaner occupied space It increases, increases equipment input cost；Second is that installing fire arrester in deduster intake stack.But back-fire relief cooling effect is paid no attention to Think.

Summary of the invention

To solve the above-mentioned problems, the utility model provides the back-fire relief cooling before a kind of air inlet for bag filter Dedusting one auxiliary device can stop high-temperature particle object, reduce dust flue gas temperature, deposit and remove particulate matter, make to enter The flue dust temperature of deduster entrance is lower than 200 DEG C, plays a protective role to dust-collecting bag, can effectively extend the use of cloth bag Service life.In, the higher situation of dust temperature shorter especially for intake stack, using effect is even more ideal.

To achieve the above object, the utility model uses following technical scheme:

One kind is for bag filter back-fire relief cooling dedusting auxiliary device, by whirlwind storehouse, cooler, ash bucket three parts structure At.

Whirlwind position in storehouse connects furnace body dust gathering arrester in the upper section of the present apparatus, including blast pipe, bulkhead, upper cover, air inlet pipe one end Flue dust outlet, the other end and cylinder-shaped bulkhead be oriented in a tangential direction welding, and conical upper cover is coupled with the suitable for reading of bulkhead.

Cooler is located at the middle section of the present apparatus, including wall, upper face plate, lower face plate, fume pipe and cooling system, upper face plate It is identical with lower face plate shape, it is disc, is evenly distributed with multiple flue gas tube connection ports above, wall is cylindrical tube shape, suitable for reading It is welded with upper face plate, lower mouth is welded with lower face plate, and fume pipe is welded between upper face plate and lower face plate, and cooling system uses air blast cooling Mode or Forced water cooling mode, air blast cooling mode is to be provided with ventilation opening in wall front and back, and in front on ventilation opening Equipped with axial flow blower, using axial flow blower wind-force by outside fume pipe between wall air and outside air force pair Stream, makes fume pipe cool down；Forced water cooling mode is to be welded with water outlet on the top of wall, and lower part is welded with water inlet, external cold water Entered in cooler by water inlet and flowed through in wall with the gap outside fume pipe, after cold water completes heat exchange with fume pipe, led to Water outlet exclusion is crossed, fume pipe is made to cool down.

Ash bucket includes ash bucket, cinder-discharging port, discharge pipe, and ash bucket is reverse frustoconic, mouth under the wall suitable for reading with cooler It is linked, mouth is cinder-discharging port under ash bucket, and cinder-discharging port lower part can match gate valve and discharge apparatus, and discharge pipe is connected on ash bucket, outlet air Nozzle is put in ash bucket, and built-in length is the 1/3 to 1/2 of bin diameter.

The beneficial effects of the utility model are:

(1) the utility model is assemblied in deduster air inlet pipeline, does not need separately to match power, flue dust is produced by fan of dust remover Raw negative pressure and form quick flowing.

(2) whirlwind chamber structure is used, after high-temperature particle object rapidly enters whirlwind storehouse, understands along bulkhead high velocity impact, move, both It can make high-temperature particle object fast cooling, and under the influence of centrifugal force, particulate matter declines along the fume pipe that bulkhead enters edge, Hopper bottom is deposited to along headwall in ash bucket, is excluded convenient for particulate matter.

(3) outlet air pipe port is put in 1/3 to 1/2 place of bin diameter in ash bucket, can only siphon away position among ash bucket Dust flue gas, particulate matter, which is in ash bucket edge and can only decline, is deposited on hopper bottom, will not enter in discharge pipe, can be avoided and remove The scaling loss of dirt cloth bag.

(4) cooler is used, flue dust carries out heat exchange by flue dust pipe and compulsory recirculated water or compulsory moving air, Temperature into discharge pipe can be substantially reduced, and guarantee that the temperature for entering deduster meets the requirements.

(5) the utility model structure is simple, and low manufacture cost is convenient and practical, prolongs the service life to deduster, and reduction makes With cost, play a significant role.

Detailed description of the invention

Fig. 1 is the utility model main view

Fig. 2 is the Section A-A figure of Fig. 1

Fig. 3 is the main view for forcing air blast cooling device

Fig. 4 is the section B-B figure of Fig. 3

In figure: 1- wall, 2- fume pipe, 3- ash bucket, 4- bulkhead, 5- blast pipe, 6- discharge pipe, 7- water inlet, 8- water outlet Mouthful, 9- upper cover, 10- lower face plate, 11- upper face plate, 12- cinder-discharging port, 13- axial flow blower, 14- air inlet hole

Specific embodiment

Specific embodiments of the utility model will be further explained with reference to the accompanying drawing:

Embodiment 1:

Whirlwind position in storehouse connects furnace body in the upper section of the present apparatus, including blast pipe 5, bulkhead 4, upper cover 9, one end of blast pipe 5 The flue dust of dust gathering arrester exports, and the other end and cylinder-shaped bulkhead 4 are oriented in a tangential direction welding, conical upper cover 9 and bulkhead 4 it is suitable for reading Knot.

Cooler is located at the middle section of the present apparatus, including wall 1, upper face plate 11, lower face plate 10, fume pipe 2 and cooling system, Upper face plate 11 is identical with 10 shape of lower face plate, is disc, above uniformly distributed multiple 2 connectors of fume pipe, and wall 1 is cylinder Tubular, suitable for reading to be welded with upper face plate 11, lower mouth is welded with lower face plate 10, and multiple flue gases are welded between upper face plate 11 and lower face plate 10 Pipe 2, cooling system use Forced water cooling mode, are welded with water outlet 8 on the top of wall 1, lower part is welded with water inlet 7, external cold Water is entered in cooler by water inlet 7, is flowed through in wall 1 and is completed hot friendship with the gap outside fume pipe 2, cold water and fume pipe 2 It after changing, is excluded by water outlet 8, fume pipe 2 is made to cool down.

Ash bucket includes ash bucket 3, cinder-discharging port 12, discharge pipe 6, and ash bucket 3 is reverse frustoconic, the wall suitable for reading with cooler 1 lower mouth is linked, and the lower mouth of ash bucket 3 is cinder-discharging port 12, and 12 lower part of cinder-discharging port can match gate valve and unloading valve, and discharge pipe 6 is connected to On ash bucket 3, air outlet tube mouth is put in ash bucket, and built-in length is the 1/3 to 1/2 of bin diameter.

Embodiment 2:

One kind is for bag filter back-fire relief cooling dedusting auxiliary device, by whirlwind storehouse, cooler, ash bucket three parts structure At.Wherein whirlwind storehouse and ash bucket two parts are same as Example 1, and cooler part includes wall 1, upper face plate 11, lower face plate 10, fume pipe 2 and cooling system.Upper face plate 11 is identical with 10 shape of lower face plate, is disc, above uniformly distributed multiple flue gases 2 connector of pipe, wall 1 are cylindrical tube shape, and suitable for reading to be welded with upper face plate 11, lower mouth is welded with lower face plate 10, in upper face plate 11 under Fume pipe 2 is welded between card 10, it is to be provided with ventilation hole in 1 front and back of wall that cooling system, which uses air blast cooling mode, 14, and axial flow blower 13 is housed on same side opening, it will be between 2 outside of fume pipe and wall 1 using the wind-force of axial flow blower 13 Air and outside air forced convertion, the dust temperature for passing in and out fume pipe 2 form the temperature difference, the temperature into deduster drops to Suitable temperature.

Claims

The dedusting auxiliary device 1. a kind of back-fire relief for bag filter cools down, by whirlwind storehouse, cooler, ash bucket three parts structure At, it is characterised in that: whirlwind storehouse includes blast pipe (5), bulkhead (4), upper cover (9), and one end of the blast pipe (5) connects furnace The flue dust of body dust gathering arrester exports, and the other end is coupled with bulkhead (4), suitable for reading being coupled of conical upper cover (9) and bulkhead (4)；Cooling Device includes wall (1), upper face plate (11), lower face plate (10), fume pipe (2) and cooling system, upper face plate (11) and lower face plate (10) shape is identical, is disc, above uniformly distributed multiple fume pipe (2) connectors, and wall (1) is cylindrical tube shape, thereon Mouth is welded with upper face plate (11), and lower mouth is welded with lower face plate (10), is welded with multiple flue gases between upper face plate (11) and lower face plate (10) It manages (2)；Ash bucket includes ash bucket (3), cinder-discharging port (12), discharge pipe (6), and ash bucket (3) is reverse frustoconic, suitable for reading and cooler Wall (1) under mouth be linked, the lower mouth of ash bucket (3) is cinder-discharging port (12), and cinder-discharging port (12) lower part with gate valve and can unload ash One end of device, discharge pipe (6) is coupled with the headwall of ash bucket (3), and communicates with ash bucket (3), the other end of discharge pipe (6) and dedusting Device air intake vent is coupled.
The dedusting auxiliary device 2. a kind of back-fire relief for bag filter according to claim 1 cools down, it is characterised in that: The cooling system can use Forced water cooling mode, be welded with water outlet (8) on the top of wall (1), lower part is welded with into water Mouthful (7), external cold water are entered in cooler by water inlet (7), flow through in wall (1) with the gap of fume pipe (2) outside, cold water It after completing heat exchange with fume pipe (2), is excluded by water outlet (8), fume pipe (2) is made to cool down.
The dedusting auxiliary device 3. a kind of back-fire relief for bag filter according to claim 1 cools down, it is characterised in that: The cooling system can use air blast cooling mode, be provided with ventilation opening (14) in wall (1) front and back, and preceding Axial flow blower (13) are housed on face mouthful, using the wind-force of axial flow blower (13) by the external sky between wall (1) of fume pipe (2) Gas and outside air forced convertion make fume pipe (2) to cool down.
The dedusting auxiliary device 4. a kind of back-fire relief for bag filter according to claim 1 cools down, it is characterised in that: The blast pipe (5) is oriented in a tangential direction with the bulkhead (4) to be coupled.
The dedusting auxiliary device 5. a kind of back-fire relief for bag filter according to claim 1 cools down, it is characterised in that: The discharge pipe (6) is coupled with the headwall of ash bucket (3), and puts in ash bucket (3), puts in 1/3 that length is bin diameter To 1/2.