CN2481727Y - Wet dust collector for smoke gas of blast furnace - Google Patents

Abstract

A wet dust collector for smoke gas of blast furnace has a barrel (4) which is filled by water and is provided with two layers of micropore plates (5, 6). Packing material (9) is arranged in the barrel. A raw gas pipe (2) and a clean gas pipe (3) penetrate through the two layers of micropore plates with umbrella type baffles (7) arranged on the lower ends, a half raw gas pipe (1) penetrates through the two layers of micropore plates, and the lower section of the half raw gas pipe is provided with micropores with an umbrella type baffle (7) arranged on the end part. A dehydration demister (12) is arranged at the entrance of an emptying port (10), and a anti-explosion hole (8) is arranged on the upper part of the barrel. The utility model has the advantages of good dust removal effects, safety and reliability, easy operation, water and electric power saved.

Description

The wet cleaner of blast furnace flue gas

The utility model belongs to be specifically designed to the device that dispersed granules is separated from gas, relates to a kind of wet cleaner of blast furnace flue gas.

Blast furnace is the key equipment of iron work, also is primary pollution source, and the raw gas of its discharging contains a large amount of dust and obnoxious flavour, and flue-gas temperature is also higher, and people, animal, plant and buildings are had harm, must just can enter atmosphere after purifying.Existing blast furnace flue gas is to utilize cloth bag dust separating.The inward flow filtration-type sack cleaner of normally a kind of lower end air inlet, because raw gas is big to the scouring force of cloth bag by cloth bag one end induction air flow ratio height, work-ing life is short." the inward flow filtration-type bag-type dust collector of air inlet up and down " of CN2273615Y bulletin though it can reduce cloth bag inlet end gas speed, overcomes the too high shortcoming of local temperature, thereby improves the work-ing life of cloth bag.But, because its capacity is little, directly emptying of a part, another part enters in the cloth bag, produces to purify to reclaim the direct emptying of half raw gas that produces when cloth bag blowback wind.Therefore, utilize bag-type dust not reach the dust discharge standard of national regulation and the hygienic standard of operational area.

The purpose of this utility model is in order to overcome the shortcoming of prior art, a kind of wet cleaner of blast furnace flue gas to be provided, and it not only has the advantage of good dedusting effect, and safe and reliable, easy and simple to handle, water and electric saving.

The utility model takes following measure to realize its purpose.A kind of wet cleaner of blast furnace flue gas, its structure comprises: the cylindrical tube of band lower cone, half raw gas that is connected with cylindrical shell enters that pipe, raw gas enter pipe, purified gas enters pipe, and is positioned at the evacuation port of cylindrical shell upper end and is positioned at the ash discharging hole of cylindrical shell lower end.The inside of its cylindrical shell is provided with double-deck microwell plate, and filler (Raschig ring) is set between the two-layer microwell plate; Water-filling in the cylindrical shell, water level exceed goes up microwell plate.Raw gas enters pipe and purified gas enters pipe and passes double-deck microwell plate, and its lower end has the umbrella shape plate washer; Half raw gas enters pipe and passes two microwell plates, and the hypomere of its pipe is provided with micropore, and the end has the umbrella shape plate washer.The dehydrating demisting device is installed by ingress at evacuation port.Nearly top cover place at cylindrical shell offers venting.The dehydrating demisting device is the centrifugal dewatering unit that is made of 16 blades.The aperture 8mm of last microwell plate, the aperture 10mm of following microwell plate is equilateral triangle and arranges; Half raw gas enters the micro-pore diameter 4mm of pipe hypomere, is equilateral triangle and arranges.

The utility model is owing to take the principle of chemical technique packing tower to carry out dedusting on the structure, the raw gas that blast furnace is directly discharged enters pipe by raw gas and enters cylindrical shell, purified gas enters pipe by purified gas and enters cylindrical shell, half raw gas enters pipe by half raw gas and enters cylindrical shell, gas dependence self pressure directly pours in the water, produce air pocket with the plate washer back of meeting, the air pocket fragmentation becomes small bubbles under the obstruction of microwell plate down, and the macrobead dust falls into the water; Gas passes down microwell plate and enters packing layer, at this moment gas is curved moves upward, and gas and liquid have had sufficient duration of contact, attaching space and contact area, thereby reaches more satisfactory mass transfer, heat-transfer effect, catch tiny micronic dust simultaneously, cut down on the hurdle of last microwell plate and fall into the water; Purge gas after the dedusting emerges from the water, move upward, the gas that has a large amount of water droplets, water smoke enters the dehydrating demisting device, produce centrifugal force by blade, water droplet is thrown toward wall and falls into the water, and the gas after the dehydration enters chimney through evacuation port, at chimney outlet gas is lighted discharging, reached the national environmental protection standard limit of smog release, so the utlity model has the advantage of good dedusting effect.In addition, because flue gas in equipment is an inflammable gas, for preventing the blast furnace tempering that meets accident, makes and press anxious increasing in the equipment, blast, be provided with venting in equipment, the defence potential risk is so another advantage of the present utility model is safe and reliable.Because device structure installs easy-maintaining simply, well, not needing increases any power, thus the utility model also have easy and simple to handle, the advantage of water and electric saving.

Below by embodiment, be further described in conjunction with the accompanying drawings.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the sectional view of dehydrating demisting device.

As shown in Figure 1, a kind of wet cleaner of blast furnace flue gas, comprise the cylindrical tube 4 that has lower cone, half raw gas that is connected with cylindrical shell enters pipe 1, and raw gas enters pipe 2, purified gas and enters pipe 3 and be positioned at the evacuation port 10 of cylindrical shell upper end and be positioned at the ash discharging hole 11 of cylindrical shell lower end.Above-mentioned part is roughly the same with prior art, its improvement part: the inside of cylindrical shell 1 is provided with double-deck microwell plate apart from 940 millimeters places of top cover, between last microwell plate 5 and the following microwell plate 6 at a distance of 200 millimeters, built-in filler Raschig ring 9.The aperture 8mm of last micropore, width between centers 12mm, the aperture 10mm of following microwell plate, width between centers 14mm, all be equilateral triangle and arrange, water-filling in the equipment, water level exceed goes up microwell plate 5 (about 100 millimeters), is the control water level, ball float is installed in the water inlet, and liquid level meter is installed herein, can observe water level at any time.Be provided with the venting 8 of 300 millimeters of Φ at 100 millimeters places of distance top cover.Raw gas enters pipe 2 and purified gas enters pipe 3 insertion microwell plates, passes 100 millimeters, and the termination has umbrella shape plate washer 7, and its space is 250 millimeters.Half raw gas enters pipe 1 and inserts microwell plate, passes 200 millimeters, and the termination also has umbrella shape plate washer 7, and its space is 150 millimeters, and half raw gas enters hypomere 400 mm lengths of pipe 1 and establishes 9 millimeters of 4 millimeters width between centers of Φ, the micropore that equilateral triangle is arranged.Dehydrating demisting device 12 is installed by ingress at evacuation port 10, has 16 leaves and constitutes (referring to Fig. 2).Dust is discharged by ash discharging hole 11, enters flue-dust retainer 13, is controlled by two butterfly valves 14.

Claims (5)

1, a kind of wet cleaner of blast furnace flue gas, comprise: the cylindrical tube (4) of band lower cone, half raw gas that is connected with cylindrical shell enters that pipe (1), raw gas enter pipe (2), purified gas enters pipe (3), and be positioned at the evacuation port (10) of cylindrical shell upper end and be positioned at the ash discharging hole (11) of cylindrical shell lower end, it is characterized in that: the inside of described cylindrical shell (4) is provided with the double-deck microwell plate of being made up of last microwell plate (5) and following microwell plate (6), filler Raschig ring (9) is set between the two-layer microwell plate, water-filling in the cylindrical shell, water level exceeds microwell plate; Described raw gas enters pipe (2) and purified gas and enters pipe (3) and pass double-deck microwell plate, and its lower end has umbrella shape plate washer (7), and half raw gas enters pipe (1) and passes two microwell plates, and the hypomere of its pipe is provided with micropore, and the end has umbrella shape plate washer (7); Dehydrating demisting device (12) is installed by the ingress of described evacuation port (10).

2, according to the wet cleaner of the described blast furnace flue gas of claim 1, it is characterized in that: the nearly top cover place of described cylindrical shell (4) offers venting (8).

3, according to the wet cleaner of the described blast furnace flue gas of claim 1, it is characterized in that: described dehydrating demisting device (12) is the centrifugal dewatering unit that is made of 16 blades.

4, according to the wet cleaner of the described blast furnace flue gas of claim 1, it is characterized in that: described aperture of going up microwell plate (5) is 8 millimeters, and width between centers is 12 millimeters, is equilateral triangle and arranges; The aperture of following microwell plate (6) is 10 millimeters, and width between centers is 14 millimeters, is equilateral triangle and arranges.

5, according to the wet cleaner of the described blast furnace flue gas of claim 1, it is characterized in that: the micropore size that described half raw gas enters pipe (1) hypomere is 4 millimeters, and width between centers is 9 millimeters, is equilateral triangle and arranges.

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