CN105771520A - Coking furnace roof dust removing device - Google Patents

Abstract

The invention discloses a coking furnace roof dust removing device. A supporting seat is arranged on a base line of a furnace roof, and a fan and a dust remover are fixed onto the supporting seat. The coking furnace roof dust removing device further comprises a main air pipe and a plurality of air collecting hoods, wherein the air collecting hoods right cover the outer sides of two adjacent coke side small furnace heads, one end of the main air pipe is communicated with an air sucking opening of the fan and an air inlet of the dust remover, and the other end of the main air pipe is communicated with the air collecting hoods through branch air pipes. Each air collecting hood is formed by a collecting section and a refracting section which are connected with each other, a spiral groove is formed in the inner wall of the collecting section in the axial direction, the refracting section is in a conical shape, and a conical top portion of the refracting section is communicated with the tail ends of the branch pipes. In work, the air collecting hoods can collect flue gas dissipated out of the small furnace heads above the base line of the furnace roof together in a concentrated mode, collected flue gas enters the main air pipe through the branch air pipes and then enters the dust remover under traction of air force of the fan, the flue gas is processed, flue gas dissipation on the furnace roof is avoided, and environmental pollution is avoided.

Description

Oven top of coke oven dust arrester

Technical field

The present invention relates to Environmental Protection Technology in Coking Industry field, specifically refer to oven top of coke oven dust arrester.

Background technology

Coking is that multi-source pollutes industry, and flue dust is mainly to pollute emissions in coking production process.Modern cell-type coke oven is generally fitted provided with vehicular or ground standing posture is coaling and coke discharging and dedusting system, and wherein the application of ground standing posture dust pelletizing system is relatively broad.Ground standing posture coke discharging and dedusting system utilizes coupling fluid-structure or VFC blower fan and to be purified its overwhelming majority flue dust collecting through coke discharging and dedusting device by the collecting hood being arranged on coke guide mainly for coke side flue dust.But the little furnace head position of coke side still has part flue dust loss to worsen working environment.The little burner of coke side discharges of the coke that flue dust derives from blow-on door, red Jiao enters grid at first, continues coke pushing and close 4 stages of fire door, wherein red Jiao to enter grid stage flue dust at first the most prominent.

Because of the front of the single little burner of coke side, firedoor frame and furnace stay to coke guide orbit centre from there are differences, bucket type dust gathering arrester scratching furnace stay is covered for preventing from leading burnt grid, its nearly body of heater end and coke side little burner front spacing are relatively big, thus leaving structural defect for flue dust from little burner loss.Flue dust temperature of the discharging of the coke height, transient heat buoyancy and dirt are large-minded, but bucket type dust gathering arrester area ratio great disparity is covered with both coke quenching cart compartment tops in coke guide grid of coke guide top, ground dedusting blower fan suction is mainly allocated to coke quenching cart compartment top and covers bucket type dust gathering arrester, cover between bucket type dust gathering arrester and little burner, there is interstice coverage plus leading burnt grid, therefore cause part flue dust from little burner loss.In order to improve its dust removing effects, some coal chemical enterprises are taked leading Jiao Shanding and cover perforate the auxiliary dust suction of additional vehicle-mounted fan on the side plate of bucket type dust gathering arrester nearly body of heater side, and Some Enterprises is taked to adjust earth station's dedusting fan time parameter that runs up in advance and entered grid stage suction at first to increase red Jiao in advance；But it is all undesirable to produce effects, but also adds power consumption.

Summary of the invention

It is an object of the invention to provide oven top of coke oven dust arrester, stop the loss of furnace roof flue gas, it is to avoid contaminated environment.

The purpose of the present invention is achieved through the following technical solutions:

Oven top of coke oven dust arrester, furnace roof baseline is provided with supporting seat, blower fan and cleaner unit are fixed on described supporting seat, also include main trachea, tedge, temporary cavity and multiple gas skirt, described gas skirt covers directly over outside two little burners of adjacent coke side, described main trachea one end connects with the inlet scoop of blower fan, temporary cavity respectively, the main trachea other end is connected with multiple described gas skirts by bronchus, tedge one end connects with cleaner unit air inlet, and the tedge other end connects with temporary cavity；Described gas skirt is made up of interconnective collection section and refraction section, and described collection section is tubular and offers helicla flute along its axis direction wall within it, and described refraction section is coniform and its cone tip portion connects with described bronchial end；Described cleaner unit includes casing, pure qi (oxygen) chamber and the filter chamber of isolation mutually it is provided with at described box house, the two side of casing is respectively equipped with air inlet pipe and escape pipe, and described pure qi (oxygen) chamber connects with escape pipe, described filter chamber connects with air inlet pipe, described pure qi (oxygen) intracavity is provided with air jet pipe, described air jet pipe one end is run through pure qi (oxygen) chamber and is extended to outside casing and be provided with pulse valve in this end, multiple filter bag it is provided with in described filter chamber, one end of described filter bag connects with described pure qi (oxygen) chamber, described air jet pipe has multiple with filter bag nozzle one to one；Also include the hinged pre-dirt plate being arranged on filter chamber top of resistant to elevated temperatures organ cover and end, one end, the other end at described pre-dirt plate is provided with the deflector tilted along airintake direction by torsion spring, described deflector end extends bottom described filter chamber, and it is fixed with balancing weight on the pre-dirt backboard side to air inlet pipe, described organ cover one end is connected with the top inner wall of filter chamber cavity, and the organ cover other end is connected with the outer wall of described balancing weight air inlet pipe side dorsad.

When the present invention works, loss flue gas out in burner little on furnace roof baseline is carried out centralized collection together by multiple gas skirts simultaneously, and the flue gas collected enters in main trachea by bronchus, enter in temporary cavity under the traction of blower fan wind-force, when the flue gas in temporary cavity is moved to dirt catcher by tedge again, can temporarily be stored by temporary cavity flue gas, convenient cleaner unit carry out debugging or to smoke filtration after carry out replying state time sustainable flue gas in little burner is collected, the flue gas in gas skirt is avoided to pile up, to complete the process of flue gas, stop the loss of furnace roof flue gas, avoid contaminated environment.Wherein, flue gas forms turbulent flow when moving in bronchus and main trachea so that flue gas has component velocity in the radial direction along trachea, and namely inner surface of trachea can be formed certain impact by flue gas, and similarly flow of flue gas can be caused certain obstruction by inner surface of trachea；And, turbulent flow can be regarded as the flowing being formed by stacking by the vortex of various different scales from physically saying, the size of these whirlpools is random in the distribution of trachea axis direction, the vortex of large scale mainly has the boundary condition of flowing to be certainly sized, can be comparable with the size in flow field, it is the reason causing low frequency pulsating；The vortex of little yardstick is mainly toughness power and is determined, its size is likely to the one thousandth magnitude of only flow field yardstick, is the reason causing dither；Microvortex rotation is formed after the Vortex Breakdown of large scale, the vortex of less yardstick is formed after the Vortex Breakdown of smaller scale, thus in full-blown turbulent region, the yardstick of watery nasal discharge vortex can change continuously in comparatively wide scope, the vortex of large scale constantly obtains energy from main flow and sets up to little vortex transmission by the interaction energy between vortex, last owing to the vortex constantly disappearance mechanical energy acting on little yardstick of fluid viscosity just converts or is called the heat energy dissipated as fluid, namely the temperature causing main trachea sharply raises, main endotracheal pressure increases, correspondingly, the workload of blower fan also sharply increases.And in the present invention, gas skirt is made up of collection section and refraction section, and on the inwall of collection section, have the helicla flute being distributed along its axis direction, the flue gas before entering main trachea is made to gradually form the eddy current of large scale in gas skirt, and non-turbulent flow, namely flue gas is rotationally advancing around the axis of trachea, particularly in being perpendicular to horizontal main duct portion, the energy that the energy that the flue gas being rotationally advancing consumes consumes when rising less than flue gas under normal circumstances, and the mechanical energy of fluid to be converted to the amount of heat energy less, the variations in temperature of main trachea is inconspicuous, and then reduce the consumption of blower fan and electric power.

And it is not good for the dust removing effects of cleaner in prior art, the present invention is provided with pre-dirt plate in the filter chamber of flue gas, namely flue gas enters into after in filter chamber through air inlet pipe, under the effect of pre-dirt plate, due to effect of inertia, crude particle dust in air-flow falls directly into the bottom (i.e. the bottom of casing) of filter chamber, and then plays the effect of pre-dirt；Air-flow continues to move up, pass through filter bag, by the dust catching outer surface at filter bag, purified gas then enters in filter bag the pure qi (oxygen) intracavity rising to filter chamber top, after converging, this purified gas is directly discharged by escape pipe, and when filter bag external dust gathers certain thickness, pulse valve action, compression air is made to flow in air jet pipe, and sprayed in the filter bag of its correspondence by multiple nozzles, high velocity air drives surrounding air to spray in each filter bag through nozzle, make the dust releasing being captured on filter bag outer wall, finally it is collected into the bottom of filter chamber, after dust bottom filter chamber is collected, pulse valve cuts out, filter bag returns back to original filtration condition；By the secondary of dust in flue gas is collected so that finally met industrial standard by expellant gas in escape pipe, reach to be badly in need of in the industry improving the purpose of dust removing effects.In prior art, when the flue gas produced in process that coke furnace carbonization chamber is coaling processes, the design path of intake stack is shorter, in flue gas, the Mars of residual can enter directly in cleaner unit and filter bag is caused damage, inventor carries out further investigation and finds, the flue gas flow velocity when entering in air inlet pipe is very unstable, in high temperature environments, the Mars flowed out with flue gas cannot consume the amount of heat himself carried when flue gas flow rate is too fast in moving process, and at flue gas flow rate relatively time slack, Mars can in moving process automatic distinguishing, namely filter bag cannot be caused damage；Meanwhile, the pre-dirt plate being fixedly installed in filter chamber can hinder the normal pass of flue gas, and therefore, the dust in flue gas can not only be filtered for the first time by the present invention at the pre-dirt plate of the hinged setting of import department of air inlet pipe, moreover it is possible to the air-flow in air inlet pipe is intercepted；When the flow velocity of flue gas stream is too fast, pre-dirt plate can be formed and impact, the pre-dirt plate flow direction around its pin joint and along flue gas is swung, utilize the balancing weight in pre-dirt back to increase the gravity of pre-dirt plate, the amplitude of fluctuation preventing pre-dirt is excessive, and once when flue gas, the impact dynamics of pre-dirt plate be reduced, reverse swing will be there is in pre-dirt plate, to control the size of the passage formed between air inlet pipe and pre-dirt plate, and then the flow velocity controlled in flue gas entrance filter chamber (namely utilizes the gas in unit volume to enter after in big passage by passage aisle with certain flow velocity, the principle that its speed can reduce)；Namely when flue gas enters in exhaustor with speed faster, under the effect of pre-dirt plate, flue gas is made all to enter in filter chamber with relatively stable speed, the Mars simultaneously entered in the lump with flue gas has enough displacements makes it be distributed by heat that self is entrained, it is to avoid Mars directly contacts with filter bag and causes that it is impaired.

Wherein, at spiral nozzle to inflation in filter bag so as to when expanding, it is attached to the dust on filter bag to sputter everywhere in filter chamber, and balancing weight upper surface has certain area, and balancing weight can accumulate more dust in balancing weight top in the process swung with pre-dirt plate, and then the gross weight of balancing weight is increased, namely increase the pre-dirt plate stop dynamics to flue gas, namely reduce the cleaning efficiency of dust in filter chamber；And in the present invention, being provided with resistant to elevated temperatures organ cover in filter chamber top inner wall, balancing weight upper surface is opened by this organ cover with the isolation of filter chamber inner space, has stopped the possibility that dust is piled up at balancing weight top, ensure the adjustment to flue gas flow rate of the pre-dirt plate, improve the efficiency of dust collection of flue gas.nullAnd deflector is connected with pre-dirt plate lower end by torsion spring，And deflector tilts along the airintake direction of air inlet inner tube smoke，Namely an initial angle being sized to obtuse angle is left between deflector and pre-dirt plate，In the process that deflector swings with pre-dirt plate，The flow direction of the flue gas entered in filter chamber can be carried out fine setting control by deflector，Deflector is impacted by the flue gas namely flowed，And when flue gas flow rate is too fast，By torsion spring, the angle between deflector and pre-dirt plate is diminished，Reduce further by the flow velocity of flue gas before flue gas contacts with filter bag，The end of deflector extends to the bottom of filter chamber simultaneously，Namely filter chamber body wall is increased、The flue gas flow channel length that pre-dirt plate sidewall and deflector sidewall are constituted，A small amount of Mars for carrying in flue gas provides longer displacement，Ensure the extinguishing of the even heat release in flue gas and a small amount of Mars，Improve the service life of filter bag.And it is arranged on the spiral nozzle on air jet pipe, cone shape air-flow can be produced, first along its inwall high-speed mobile when this gas shock filter bag is internal, and the dust that is attached to filter bag surrounding is relatively many, traditional direct-injection nozzle is directly directed at the bottom of filter bag to be carried out impacting till gas is full of filter bag, the dust that filter bag just can will be attached to because of volumetric expansion on its outer wall ejects, and filter bag inwall can be carried out high speed impact in moment by spiral nozzle, the instantaneous dust that will be attached on filter bag outer wall ejects so that on filter bag, the cleaning speed of dust is greatly improved.

Being provided with flap valve at described bronchial end, described flap valve connects with described refraction section upper end.By flap valve, the flow that the flue gas in gas skirt can enter bronchus and main trachea regulates and controls, it is to avoid idle running or overload occurs in the workload of blower fan, and then reduces cost when fume collection processes.

Described main trachea is provided with flue gas switching valve.When the flue gas loss of the little burner of coke side is serious, during the fume collection overload of bronchus and main trachea, it is positioned at the flue gas switching valve on main trachea can directly connect with ground station for dust removal, auxiliary conducting can be carried out by the flue gas in gas skirt, improve the fume collection treatment effeciency in the little burner of coke side.

Having stopper slot in the upper end of described balancing weight, be hinged with connecting rod at the top of described filter chamber, and be provided with roller at the end of connecting rod, described roller-coaster is arranged in stopper slot.When the amplitude of fluctuation of pre-dirt plate is excessive, is equivalent to the flue gas in exhaustor and directly impacts on filter bag, it is impossible to reach two-stage dust removal effect, and easily make filter bag be subject to the interference of Mars and impaired；The present invention has stopper slot in the upper end of balancing weight, and hinged on the cavity wall of filter chamber it is provided with connecting rod, and the pulley of connecting rod end is slidably at stopper slot, make to obtain to slide mobile extreme position on the left of stopper slot time, pre-dirt plate then cannot continue to swing to the right, similarly, when pulley moves the extreme position on the right side of stopper slot, pre-dirt plate then cannot continue to swing to the left, excessive with the left and right amplitude of oscillation that prevents pre-dirt plate, ensure that flue gas enters in filter chamber with stable flow velocity in dust removal process, maximizes the dust removing effects realizing flue gas.

Being provided with condenser on the sidewall of described casing, the gas outlet of described condenser connects with filter chamber, and the air inlet of condenser connects with air inlet pipe.Arranging condenser between air inlet pipe and filter chamber, described condenser is flue gas condenser, a large amount of heat energy carried can be eliminated a part, affect the service life of filter bag to prevent the flue-gas temperature entering in filter chamber too high in flue gas.

The bottom of described casing is provided with revolving valve.As preferably, rotary valve is installed back at box bottom, wherein revolving valve is also referred to as discharge valve or vane type wind stopping device, vane type wind stopping device Main Function in air conveying or casing is that and makes discharger when there being pressure differential, dust is smoothly discharged out, and stop air to leak, thus ensure that conveying and casing energy normally and work efficiently.

The present invention compared with prior art, has such advantages as and beneficial effect:

1, the gas skirt of the present invention is made up of collection section and refraction section, and on the inwall of collection section, have the helicla flute being distributed along its axis direction, the flue gas before entering main trachea is made to gradually form the eddy current of large scale in gas skirt, and non-turbulent flow, namely flue gas is rotationally advancing around the axis of trachea, particularly in being perpendicular to horizontal main duct portion, the energy that the energy that the flue gas being rotationally advancing consumes consumes when rising less than flue gas under normal circumstances, and the mechanical energy of fluid to be converted to the amount of heat energy less, the variations in temperature of main trachea is inconspicuous, and then reduce the consumption of blower fan and electric power；

2, the present invention is when the flue gas loss of the little burner of coke side is serious, during the fume collection overload of bronchus and main trachea, it is positioned at the flue gas switching valve on main trachea can directly connect with ground station for dust removal, auxiliary conducting can be carried out by flue gas in gas skirt, improve the fume collection treatment effeciency in the little burner of coke side；

3, in the present invention, the scope of bag dust filter process air quantity is wide, and little to per minute several square meters are big to tens thousand of square metres per minute, it is adaptable to the flue gas ash removal at industrial furnace cellar for storing things, can greatly reduce the discharge of atmosphere pollution.

Accompanying drawing explanation

Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes the part of the application, is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:

Fig. 1 is present configuration schematic diagram；

Fig. 2 is the structural representation of cleaner unit；

Fig. 3 is the structural representation under cleaner unit deashing state.

Labelling and corresponding parts title in accompanying drawing:

1-air inlet pipe, 2-condenser, 3-pulse valve, 4-pre-dirt plate, 5-air jet pipe, 6-connecting rod, 7-stopper slot, 8-balancing weight, 9-deflector, 10-escape pipe, 11-filter bag, 12-revolving valve, 13-casing, 14-organ cover, 15-supporting seat, 16-furnace roof baseline, 17-tedge, the main trachea of 18-, 19-helicla flute, 20-gas skirt, 21-flap valve, 22-bronchus, 23-flue gas switching valve, 24-cleaner unit, 25-blower fan, 26-keep in cavity.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and exemplary embodiment and the explanation thereof of the present invention are only used for explaining the present invention, not as a limitation of the invention.

Embodiment 1

As shown in Fig. 1 ~ Fig. 3, the present embodiment is provided with supporting seat 15 on furnace roof baseline 3, blower fan 25 and cleaner unit 24 are fixed on described supporting seat 15, also include main trachea 18, tedge 17, temporary cavity 26 and multiple gas skirt 20, described gas skirt 20 covers directly over outside two little burners of adjacent coke side, described main trachea 18 one end respectively with the inlet scoop of blower fan 25, temporary cavity 26 connects, main trachea 18 other end is connected with multiple described gas skirts 20 by bronchus 9, tedge 17 one end connects with cleaner unit 24 air inlet, tedge 17 other end connects with temporary cavity 26；Described gas skirt 20 is made up of interconnective collection section and refraction section, and described collection section is tubular and offers helicla flute 19 along its axis direction wall within it, and described refraction section is coniform and its cone tip portion connects with described bronchus 9 end；Described cleaner unit 24 includes casing 13, pure qi (oxygen) chamber and the filter chamber of isolation mutually it is internally provided with at described casing 13, the two side of casing 13 is respectively equipped with air inlet pipe 1 and escape pipe 10, and described pure qi (oxygen) chamber connects with escape pipe 10, described filter chamber connects with air inlet pipe 1, described pure qi (oxygen) intracavity is provided with air jet pipe 5, described air jet pipe 5 one end is run through pure qi (oxygen) chamber and is extended to outside casing 13 and be provided with pulse valve 3 in this end, multiple filter bag 11 it is provided with in described filter chamber, one end of described filter bag 11 connects with described pure qi (oxygen) chamber, described air jet pipe 5 have multiple with filter bag 11 nozzle one to one；Also include the hinged pre-dirt plate 4 being arranged on filter chamber top of resistant to elevated temperatures organ cover 14 and end, one end, the other end at described pre-dirt plate 4 is provided with the deflector 9 tilted along airintake direction by torsion spring, described deflector 9 end extends bottom described filter chamber, and on the side of air inlet pipe 1, it is fixed with balancing weight 8 at pre-dirt plate 4, described organ cover 14 one end is connected with the top inner wall of filter chamber cavity, and organ cover 14 other end is connected with the outer wall of described balancing weight 8 air inlet pipe 1 side dorsad.

During work, loss flue gas out in burner little on furnace roof baseline 3 is carried out centralized collection together by multiple gas skirts 20 simultaneously, and the flue gas collected enters in temporary cavity 26 by bronchus 9, when the flue gas in temporary cavity 26 is moved to dirt catcher 11 by tedge 17 again, can temporarily be stored by temporary cavity 26 flue gas, convenient cleaner unit 24 carry out debugging or to smoke filtration after carry out replying state time sustainable flue gas in little burner is collected, the flue gas in gas skirt 20 is avoided to pile up, to complete the process of flue gas, stop the loss of furnace roof flue gas, avoid contaminated environment.Wherein, flue gas forms turbulent flow when moving in bronchus 9 and main trachea 18 so that flue gas has component velocity in the radial direction along trachea, and namely inner surface of trachea can be formed certain impact by flue gas, and similarly flow of flue gas can be caused certain obstruction by inner surface of trachea；And, turbulent flow can be regarded as the flowing being formed by stacking by the vortex of various different scales from physically saying, the size of these whirlpools is random in the distribution of trachea axis direction, the vortex of large scale mainly has the boundary condition of flowing to be certainly sized, can be comparable with the size in flow field, it is the reason causing low frequency pulsating；The vortex of little yardstick is mainly toughness power and is determined, its size is likely to the one thousandth magnitude of only flow field yardstick, is the reason causing dither；Microvortex rotation is formed after the Vortex Breakdown of large scale, the vortex of less yardstick is formed after the Vortex Breakdown of smaller scale, thus in full-blown turbulent region, the yardstick of watery nasal discharge vortex can change continuously in comparatively wide scope, the vortex of large scale constantly obtains energy from main flow and sets up to little vortex transmission by the interaction energy between vortex, last owing to the vortex constantly disappearance mechanical energy acting on little yardstick of fluid viscosity just converts or is called the heat energy dissipated as fluid, namely the temperature causing main trachea 18 sharply raises, pressure in main trachea 18 increases, correspondingly, the workload of blower fan 25 also sharply increases.And in the present invention, gas skirt 20 is made up of collection section and refraction section, and on the inwall of collection section, have the helicla flute 19 being distributed along its axis direction, the flue gas before entering main trachea 18 is made to gradually form the eddy current of large scale in gas skirt 20, and non-turbulent flow, namely flue gas is rotationally advancing around the axis of trachea, particularly in being perpendicular to horizontal main trachea 18 part, the energy that the energy that the flue gas being rotationally advancing consumes consumes when rising less than flue gas under normal circumstances, and the mechanical energy of fluid to be converted to the amount of heat energy less, the variations in temperature of main trachea 18 is inconspicuous, and then reduce the consumption of blower fan 25 and electric power.

Not good for the dust removing effects of cleaner in prior art, the present embodiment is provided with pre-dirt plate 4 in the filter chamber of flue gas, namely flue gas enters into after in filter chamber through air inlet pipe 1, under the effect of pre-dirt plate 4, due to effect of inertia, crude particle dust in air-flow falls directly into the bottom (i.e. the bottom of casing 13) of filter chamber, and then plays the effect of pre-dirt；Air-flow continues to move up, by filter bag 11, by the dust catching outer surface at filter bag 11, purified gas then enters the pure qi (oxygen) intracavity rising to filter chamber top in filter bag 11, after converging, this purified gas is directly discharged by escape pipe 10, and when filter bag 11 external dust gathers certain thickness, pulse valve 3 action, compression air is made to flow in air jet pipe 5, and sprayed in the filter bag 11 of its correspondence by multiple nozzles, high velocity air drives surrounding air to spray in each filter bag 11 through nozzle, make the dust releasing being captured on filter bag 11 outer wall, finally it is collected into the bottom of filter chamber, after dust bottom filter chamber is collected, pulse valve 3 cuts out, filter bag 11 returns back to original filtration condition；By the secondary of dust in flue gas is collected so that finally met industrial standard by expellant gas in escape pipe 10, reach to be badly in need of in the industry improving the purpose of dust removing effects.

And in prior art, when the flue gas produced in process that coke furnace carbonization chamber is coaling processes, the design path of intake stack is shorter, in flue gas, the Mars of residual can enter directly in cleaner unit and filter bag 11 is caused damage, inventor carries out further investigation and finds, the flue gas flow velocity when entering in air inlet pipe 1 is very unstable, in high temperature environments, the Mars flowed out with flue gas cannot consume the amount of heat himself carried when flue gas flow rate is too fast in moving process, and at flue gas flow rate relatively time slack, Mars can in moving process automatic distinguishing, namely filter bag 11 cannot be caused damage；Simultaneously, the pre-dirt plate 4 being fixedly installed in filter chamber can hinder the normal pass of flue gas, therefore, the dust in flue gas can not only be filtered for the first time by the present embodiment at the pre-dirt plate 4 of the hinged setting of import department of air inlet pipe 1, moreover it is possible to the air-flow in air inlet pipe 1 is intercepted；When the flow velocity of flue gas stream is too fast, pre-dirt plate 4 can be formed and impact, the pre-dirt plate 4 flow direction around its pin joint and along flue gas is swung, utilize the balancing weight 8 on pre-dirt plate 4 back side to increase the gravity of pre-dirt plate 4, the amplitude of fluctuation preventing pre-dirt is excessive, and once when flue gas, the impact dynamics of pre-dirt plate 4 be reduced, reverse swing will be there is in pre-dirt plate 4, to control the size of the passage formed between air inlet pipe 1 and pre-dirt plate 4, and then the flow velocity controlled in flue gas entrance filter chamber (namely utilizes the gas in unit volume to enter after in big passage by passage aisle with certain flow velocity, the principle that its speed can reduce)；Namely when flue gas enters in exhaustor with speed faster, under the effect of pre-dirt plate 4, flue gas is made all to enter in filter chamber with relatively stable speed, the Mars simultaneously entered in the lump with flue gas has enough displacements makes it be distributed by heat that self is entrained, it is to avoid Mars directly contacts with filter bag 11 and causes that it is impaired.nullWherein，Deflector 9 is connected with pre-dirt plate 4 lower end by torsion spring，And the airintake direction of deflector 9 flue gas along air inlet pipe 1 tilts，Namely an initial angle being sized to obtuse angle is left between deflector 8 and pre-dirt plate 4，In the process that deflector 8 swings with pre-dirt plate 4，The flow direction of the flue gas entered in filter chamber can be carried out fine setting control by deflector 8，Deflector 8 is impacted by the flue gas namely flowed，And when flue gas flow rate is too fast，By torsion spring, the angle between deflector 8 and pre-dirt plate 4 is diminished，Reduce further by the flow velocity of flue gas before flue gas contacts with filter bag 11，The end of deflector 9 extends to the bottom of filter chamber simultaneously，Namely filter chamber body wall is increased、The flue gas flow channel length that pre-dirt plate 4 sidewall and deflector 9 sidewall are constituted，A small amount of Mars for carrying in flue gas provides longer displacement，Ensure the extinguishing of the even heat release in flue gas and a small amount of Mars，Improve the service life of filter bag.And it is arranged on the spiral nozzle on air jet pipe 5, cone shape air-flow can be produced, first along its inwall high-speed mobile when this gas shock filter bag 11 is internal, and the dust that is attached to filter bag 11 surrounding is relatively many, traditional direct-injection nozzle is directly directed at the bottom of filter bag 11 to be carried out impacting till gas is full of filter bag 11, the dust that filter bag 11 just can will be attached to because of volumetric expansion on its outer wall ejects, and filter bag 11 inwall can be carried out high speed impact in moment by spiral nozzle, the instantaneous dust that will be attached on filter bag 11 outer wall ejects, the cleaning speed making dust on filter bag 11 is greatly improved.

The present embodiment passes through flap valve 21, and the flow that the flue gas in gas skirt 20 can enter bronchus 22 and main trachea 18 regulates and controls, it is to avoid idle running or overload occurs in the workload of blower fan 25, and then reduces cost when fume collection processes.When the flue gas loss of the little burner of coke side is serious, during the fume collection overload of bronchus 22 and main trachea 18, it is positioned at the flue gas switching valve 23 on main trachea 18 can directly connect with ground station for dust removal, auxiliary conducting can be carried out by flue gas in gas skirt 20, improve the fume collection treatment effeciency in the little burner of coke side.

Wherein, the present embodiment has stopper slot 7 in the upper end of described balancing weight 8, is hinged with connecting rod 6 at the top of described filter chamber, and is provided with roller at the end of connecting rod 6, and described roller-coaster is arranged in stopper slot 7；Being provided with condenser 2 on the sidewall of described casing 13, the gas outlet of described condenser 2 connects with filter chamber, and the air inlet of condenser 2 connects with air inlet pipe 1.

When the amplitude of fluctuation of pre-dirt plate 4 is excessive, is equivalent to the flue gas in exhaustor and directly impacts on filter bag 11, it is impossible to reach two-stage dust removal effect, and easily make filter bag 11 be subject to the interference of Mars and impaired；The present invention has stopper slot 7 in the upper end of balancing weight 8, and hinged on the cavity wall of filter chamber it is provided with connecting rod 6, and the pulley of connecting rod 6 end is slidably at stopper slot 7, make to obtain to slide mobile extreme position on the left of stopper slot 7 time, pre-dirt plate 4 then cannot continue to swing to the right, similarly, when pulley moves the extreme position on the right side of stopper slot 7, pre-dirt plate 4 then cannot continue to swing to the left, excessive with the left and right amplitude of oscillation that prevents pre-dirt plate 4, ensure that flue gas enters in filter chamber with stable flow velocity in dust removal process, maximizes the dust removing effects realizing flue gas.Arranging condenser 2 between air inlet pipe 1 and filter chamber, described condenser 2 is flue gas condenser 2, a large amount of heat energy carried can be eliminated a part, affect the service life of filter bag 11 to prevent the flue-gas temperature entering in filter chamber too high in flue gas.

As preferably, rotary valve 12 is installed back bottom casing 13, wherein revolving valve 12 is also referred to as discharge valve or vane type wind stopping device, vane type wind stopping device Main Function in air conveying or casing 13 is that and makes discharger when there being pressure differential, dust is smoothly discharged out, and stop air to leak, thus ensure that conveying and casing 13 energy normally and work efficiently.

Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect have been further described; it is it should be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims (6)

1. oven top of coke oven dust arrester, furnace roof baseline (16) is provided with supporting seat (15), blower fan (25) and cleaner unit (24) are fixed on described supporting seat (15), it is characterized in that: also include main trachea (18), tedge (17), temporary cavity (26) and multiple gas skirt (20), described gas skirt (20) covers directly over outside two little burners of adjacent coke side, described main trachea (18) one end respectively with the inlet scoop of blower fan (25), temporary cavity (26) connection, main trachea (18) other end is connected with multiple described gas skirts (20) by bronchus (22), tedge (17) one end connects with cleaner unit (24) air inlet, tedge (17) other end connects with temporary cavity (26)；Described gas skirt (20) is made up of interconnective collection section and refraction section, described collection section is tubular and offers helicla flute (19) along its axis direction wall within it, and described refraction section is coniform and its cone tip portion connects with described bronchus (22) end；Described cleaner unit includes casing (13), pure qi (oxygen) chamber and the filter chamber of isolation mutually it is internally provided with at described casing (13), the two side of casing (13) is respectively equipped with air inlet pipe (1) and escape pipe (10), and described pure qi (oxygen) chamber connects with escape pipe (10), described filter chamber connects with air inlet pipe (1), described pure qi (oxygen) intracavity is provided with air jet pipe (5), described air jet pipe (5) one end is run through pure qi (oxygen) chamber and is extended to casing (13) and outward and be provided with pulse valve (3) in this end, multiple filter bag (11) it is provided with in described filter chamber, one end of described filter bag (11) connects with described pure qi (oxygen) chamber, described air jet pipe (5) have multiple with filter bag (11) nozzle one to one；Also include the hinged pre-dirt plate (4) being arranged on filter chamber top of resistant to elevated temperatures organ cover (14) and end, one end, the other end described pre-dirt plate (4) is provided with the deflector (9) tilted along airintake direction by torsion spring, described deflector (9) end extends bottom described filter chamber, and on the side of air inlet pipe (1), it is fixed with balancing weight (8) pre-dirt plate (4), described organ cover (14) one end is connected with the top inner wall of filter chamber cavity, and organ cover (14) other end is connected with the outer wall of described balancing weight (8) air inlet pipe dorsad (1) side.

2. oven top of coke oven dust arrester according to claim 1, it is characterised in that: being provided with flap valve (21) at described bronchus (22) end, described flap valve (21) connects with described refraction section upper end.

3. oven top of coke oven dust arrester according to claim 1, it is characterised in that: on described main trachea (18), flue gas switching valve (23) is installed.

4. oven top of coke oven dust arrester according to claim 1, it is characterized in that: have stopper slot (7) in the upper end of described balancing weight (8), connecting rod (6) it is hinged with at the top of described filter chamber, and at the end of connecting rod (6), roller being installed, described roller-coaster is arranged in stopper slot (7).

5. oven top of coke oven dust arrester according to claim 1, it is characterized in that: condenser (2) is installed on the sidewall of described casing (13), the gas outlet of described condenser (2) connects with filter chamber, and the air inlet of condenser (2) connects with air inlet pipe (1).

6. oven top of coke oven dust arrester according to claim 1, it is characterised in that: the bottom of described casing (13) is provided with revolving valve (12).