CN2176818Y - Dusting device - Google Patents

Abstract

The utility model relates to a dusting device, which is an environmental protection dedusting equipment used for boilers, in particular for boiling furnaces. The dusting device is a two-stage dedusting apparatus composed of a dry dust catcher and a wet dust catcher. The structure of this dusting device is characterized in that the shell of the dry dust catcher is provided with a tipping plate apparatus, and the inner space of the shell is formed into three dusting zones-a first deposition zone, a tipping plate zone, and a peace and quiet zone by the tipping plate apparatus. In addition, the shell of the wet dust catcher is also provided with an aqueous film body used for eliminating the dry zone in the center. The dusting efficiency of this dusting device reaches as high as 99.9%. The dust content of the smoke discharging is less than 200 mg/metre<3> stipulated by the government. This device can be widely applied to the fields of the dusting of boiling furnaces, the dusting of general fixed bed boilers, etc.

Description

Dusting device

The dust arrester that the utility model relates to is to be used for the particularly environmental protection cleaner of fluidized bed furnace of boiler, also can be used for fine dust capture separation in other industrial production.

After fluidized bed furnace is asked the city, obtained general applying, but the time longly it is found that fluidized bed furnace discharged flue gas dustiness is very big, generally at 20～60 gram/mark cubic meters.Can't be controlled at the smoke content of fluidized bed furnace discharging below the national environmental standard with existing dust arrester, environment is caused very big pollution.Existing cleaner has its efficient of cyclone separator to have only 70～80%; CCJ formula hydrofilter is owing to reasons such as operation, technology and dust contained flue gas fluctuation also often can not be up to standard; In recent years the ceramic cyclone separator efficiency of dust collection of Chu Xianing increases, also just between 70～90%.In a word to so far, do not find a kind of comparatively desirable dust arrester that the smoke content of fluidized bed furnace discharging can be controlled at below the national standard as yet.

The utility model purpose provide a kind of novel, efficient, can be controlled at dust arrester below the national standard to the boiler smoke dustiness.

The technical scheme that adopts that achieves the above object is: this dust-removing device for boiler that is used for, form by dry collector and wet scrubber, wet scrubber comprises the housing that is provided with smoke air inlet, smoke outlet tube, the sewage enrichment device that housing bottom is provided with, water supply system, drainage; Dry collector comprises housing, the discharge with endless screw device that is provided with in the smoke air inlet that is provided with on the housing, flue gas gas outlet and the housing, it is characterized in that the dry collector smoke outlet tube connects formation two-stage dust removal device with wet scrubber flue gas air intake pipeline, wherein also be provided with the sloping plate unit of the upper and lower fixing plate formation of swash plate group and swash plate group in the dry collector housing, the setting of this device makes the interior space of housing form just heavy district, swash plate district, three dedusting zones, peace and quiet district.

The dust arrester of making by technique scheme has following advantage, the setting of swash plate group and the choose reasonable by swash plate distance between plates, inclination angle can reach more than 97% dry collector efficient in dry collector, head and shoulders above the efficiency of dust collection of cyclone separator; In wet scrubber because the setting of taper water film body, the central dry area that can remove smoke and enter deduster housing internal cause centrifugal action and produce, the dust that elimination central dry area vortex up-flow is carried secretly is directly discharged, and has increased the moisture film area, can improve efficiency of dust collection; Enter an enrichment device after washing the sewage collecting of flue gas, the clear water of overflow can cycle applications, and the concentration of hydraulic mixture of bottom enrichment enters in the grey slag muck with a small-sized sludge pump within 20～30%, has accomplished no unloading water, and water saving; This dust arrester also have a significant advantage be do, the two-stage dust removal device that constitutes of wet dust catcher, its dust removing effects can be controlled at below the national standard fully.

Accompanying drawing has provided the structural representation of dust arrester of the present utility model.

Referring to accompanying drawing, this dry type deduster comprises housing (1), housing (1) is gone up smoke air inlet (2), the smoke outlet tube (3) that is provided with, the swash plate group that the plate washer (5) that housing (1) inner bottom part is provided with discharge with endless screw device (4) and locates to be provided with near air inlet (2), this dry type deduster main feature are made up of several swash plates (6) and being used for swash plate the group fixedly interior upper mounted plate (7) of what housing (1), bottom plate (8) and formation.As the core component sloping plate unit of dry collector, thin more good more board making under the preceding topic of requirement of strength can be selected smoothly, be satisfied to the material of its swash plate (6) for use.Grit separative efficiency and plate grow up to proportional relation in the length range that adapts to, so swash plate (6) sheet material should be decided as the case may be.The inclination angle of swash plate (6) can be selected in 55～70 degree, according to the selected optimum angle of incidence of on-the-spot dedusting material.Distance between plates can be selected within 15～30mm between adjacent two swash plates (6).The setting of sloping plate unit makes the first heavy district, the swash plate grit that form swash plate group below in the housing (1) separate dedusting area and three dedusting zones, peace and quiet district, swash plate group top.

Referring to accompanying drawing, this wet scrubber comprises housing (9), housing (9) is gone up smoke air inlet (10) and the exhaust outlet (11) that is provided with, water supply system by clarified water pump (12), valve (13), water spout (14), drainpipe (15), enrichment device (16), valve (17) and feed water valve (18) are formed connects the drainage that what enrichment device (16) constitutes by slush pump (19) by pipeline.All to be that the wet scrubber known technology is no longer superfluous state for above-mentioned housing, enrichment device water supply system, drainage structure, and the construction features of this wet scrubber are also to be provided with a water film body (20) in housing (9), the purpose that is provided with of this taper water film body is to eliminate the central dry area that housing internal cause centrifugal action produces, and makes the flue gas that enters in the housing (9) fully by discharging after the moisture film bathing in the housing.

The utility model main feature be do, the wet type two-stage dust removal, so dry collector smoke outlet tube (3) is connected by pipeline with the gas approach (10) of wet scrubber.

Further specify the course of work of the utility model dust arrester with reference to the accompanying drawings.Ash-laden gas enters dry collector by dry collector air inlet (2), imported at the just heavy district, below of housing (1) inner swash plate device by its inner damping plate washer (5), the ash-laden gas flow area strengthens suddenly, flow velocity drops to 0,2～0,4 meter per seconds, and big dust particle is deposited to bottom, just heavy district in the flue gas under the gravity effect.The dusty gas flow velocity reduces also makes flue gas obtain in first heavy district stablely making it can enter the swash plate grit uniformly to separate dedusting area.Flue gas stream rises along the smooth swash plate (6) that several are 55～70 degree oblique angles in the swash plate district with the speed of 0,1～0,2 meter per seconds, and forms the up-flow field laminar flow regime opposite with falling the flow field both direction between the plate distance of 15～30mm.Solia particle in the up-flow field is little because of air velocity, under the gravity effect and sedimentation enters the flow field that falls between plate, falls on the lower panel face.That falls that solia particle on the plate face has advances to rest on swash plate (6) the plate face temporarily, and what have then rolls downwards along the inclined-plane.The particle cluster that forms with temporarily resting on particulate adhesion on the inclined-plane in rolling has been accelerated the speed that tumbles, passes just heavy district and falls into the deduster bottom, discharges by discharge with endless screw device (4).The flue gas that enters peace and quiet district, top through the swash plate district has the solia particle more than 97% separated,, tangentially enter wet scrubber and carry out final dusting by outlet (3), wet scrubber smoke air inlet (10) than clean flue gas with the speed of 8～15 meter per seconds.Enter wet type remove device flue gas, under action of centrifugal force around the rotation of water film body (20) limit, Bian Shangsheng.The water smoke of water spout (14) ejection of the clear water that flue gas that rises and clarified water pump (12) are pressed on housing (9) meets, and the surplus particulate of institute is by under the water smoke band in the flue gas.Because central dry area has been eliminated in the setting of water film body (8), has guaranteed that flue gas can be cleaned by water more completely, enter that surplus solia particle 98% can be cleaned by water in the flue gas of wet scrubber.Dust-laden sewage is flowed in the sewage enrichment device (16) by wet scrubber drainpipe (15), and through the enrichment device, concentration is that 30% mud is drained in the escorial by slush pump (19).Discharged through the exhaust outlet (11) of wet scrubber by the flue gas after the water smoke cleaning.

The efficiency of dust collection of this dust arrester is up to 99,9%.The smoke evacuation dust-laden is at 200 milligrams/meter of national regulation ³Below.Can guarantee to discharge flue dust 400 milligrams/meter with the one-level dry collector on the outskirts of a town in regulation ³Below.This device mainly can be used on the fluidized bed furnace dedusting.Also can be used for general fixed bed boiler dusting.

Claims (3)

1, a kind of dust arrester that is used for boiler dusting is made up of dry collector and wet scrubber, and wet scrubber comprises the housing that is provided with smoke air inlet, exhaust outlet, the sewage enrichment device that housing bottom is provided with, water supply system, drainage; Dry collector comprises the discharge with endless screw device that is provided with in gas approach, smoke outlet tube and the housing that is provided with on housing, the housing, it is characterized in that dry collector smoke outlet tube and wet scrubber smoke air inlet pipeline are connected into the two-stage dust removal device, wherein also be provided with the sloping plate unit that is made of swash plate group and swash plate group upper and lower fixing plate in the dry collector housing, the setting of this device makes the interior space of housing form just heavy district, swash plate district, three dedusting zones, peace and quiet district.

2, by the described dust arrester of claim 1, the swash plate inclination angle that it is characterized in that said swash plate group is 55～70 degree.

3,, it is characterized in that also being provided with the water film body that is used to eliminate central dry area in the housing of said wet scrubber by the described dust arrester of claim 1.

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