CN2392599Y

CN2392599Y - Dry desulfurising denitridation dusting device

Info

Publication number: CN2392599Y
Application number: CN 99228810
Authority: CN
Inventors: 丁邦莹
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-06
Filing date: 1999-07-06
Publication date: 2000-08-23
Anticipated expiration: 2009-07-06

Abstract

The utility model relates to a dry desulfuring denitridation dusting device, which belongs to the separation technical field. The utility model is used for removing dust, sulfur, nitrogen, etc. in the smoke of a middle and a small industrial furnaces by a dry mode. The utility model is characterized in that an air inlet is tangentially arranged on one side of a casing of the dusting device; the air inlet is directly communicated with a lower ash bucket through a spiral lower vortex channel. A high voltage electrostatic field is arranged in the casing; a vibration device and an explosion protection are arranged on the top of the casing. The utility model can simultaneously carry out cyclone dusting, electrostatic dusting, desulphurization and denitrification; the utility model can be widely used for purifying the smoke of industrial furnaces.

Description

Dry desulfurization denitrification dedusting device

It is a kind of with the device of physics with the method purified industrial stove flue gas of chemistry that the utility model provides, and belongs to separation technology field.

According to the knowledge of the applicant, present domestic a large amount of middle-size and small-size industrial furnace that moving, as boiler, limekiln, furnace cupola, heating furnace etc., the purified treatment of its flue gas is absorbed in the condition of difficulty.Adopted single stage cyclone or sedimentation atomized water spray method in the past, though certain dust removing effects is arranged, far apart with the standard of environmental requirement, can't be up to standard, belonged to superseded row.Use now more high-efficiency cloth bag deduster or horizontal type electric dust collector, though dust emission can be up to state standards, can not desulfurization removing nitric, especially its system is huge, cost is high, the expense of controlling device substantially exceeds stove itself, for the user is difficult to acceptance.Now, country is for preventing acid rain harm, to burning the industrial furnace fume emission of coal, higher environmental requirement has been proposed, stipulated the desulfurization index, can further stipulate the denitrogenation index from now on, this makes that a large amount of middle-size and small-size industrial furnace discharged flue gas purified treatment problems is more outstanding.

The purpose of this utility model just is to provide a kind of controlling device of novel middle-size and small-size industrial furnace flue gas, and it adopts dry method dust, and can desulfurization removing nitric, and clean-up effect is obvious, the anxiety of non-secondary pollution, and cost of equipment is cheap, can accept for the user.

The purpose of this utility model is achieved in that in deduster housing one side, the tangential air inlet of installing, by the straight-through bottom of spiral helicine backspin runner ash bucket, in the ash bucket upper body, tubular positive plate and corresponding with it bar-shaped negative electrode, high-pressure between the two are installed, form the high-voltage electrostatic field, on housing top, the spraying pipe and the air outlet that can spray chemical absorbent are arranged, case top is equipped with vibrating device and explosion-protection equipment.By above device, in deduster, carry out cyclone dust removal, electrostatic precipitation and chemical method desulfurization removing nitric simultaneously.Flue gas from stove comes out enters at a high speed from air inlet, purifies the back through these three kinds of modes and discharges from air outlet.

Cyclone dust removal: flue gas tangentially enters annular backspin runner by air inlet, does downward rotation at a high speed, and wherein thick middle granule dust is got rid of to inner walls, falls and enters ash bucket.

Electrostatic precipitation: exist the high-voltage electrostatic field in bar-shaped negative electrode and tubular anode, dust is adsorbed by anode after part forms anion in this ionization, and the top vibrating device makes the anode starting of oscillation, and dust falls, and enters ash bucket.

The chemical method sulphur removal is denitrogenated: the ozone that generates in the high-voltage electrostatic field is sulfide, nitride oxidation, and with the absorbent reacting generating compound, form that ash dropping hopper reclaims under the solids.

The utility model advantage is: the efficiency of dust collection height, and dedusting can reach 99%, and desulfurization removing nitric can reach more than 90%, and its regenerant is good chemical fertilizer, and certain economic benefit is arranged.Be dry method dust owing to what adopt again, the danger of non-secondary pollution.This dust arrester is a vertical structure, and floor space is little, small investment, reliable, simple to operate, easy to maintenance.

The contrast accompanying drawing is described in further detail below:

Fig. 1 is the utility model structure working principle schematic diagram.

Fig. 2 is the cut-away view of A-A section.

Among the figure:

1. ash bucket 2. backspin runners 3. housings 4. positive plates 5. air inlets 6. absorbents spray pipe 7. air outlets 8. vibrating devices 9. leads 10. explosion-protection equipments 11. bar-shaped negative electrode 12. high-voltage power-supply units 13. bearings

As can be seen from Figure, air inlet 5 is positioned at the side of deduster housing 3, the tangential spiral backspin runner that connects 2 through bottom ash buckets 1.Ash bucket 1 upper bracket 13 installs and fixes whole deduster.On ash bucket 1 top, housing 3 inside, the positive plate 4 of two groups of concentric garden cartridge types is arranged, more than 11 on bar-shaped negative electrode is distributed in wherein.High-voltage power-supply unit 12 is contained on the bearing 13, and is connected with bar-shaped negative electrode 11 by lead 9, and positive plate 4 ground connection make and set up about 200,000 volts high-voltage electrostatic field between two.On housing 3 tops, spraying pipe 6 that can spray chemical absorbent and the air outlet 7 of discharging for flue gas are housed.At housing 3 tops, also have explosion-protection equipment 10 and make positive plate 4 can play the vibrating device 8 of vibration.

Ash-laden gas at a high speed tangentially enters from air inlet 5, along screw type backspin runner 2 straight-through bottom ash buckets 1.Flue gas in the process of rotation downwards at a high speed, in, coarse grained dust under action of centrifugal force, get rid of inwall to shell 3, be settled down in the ash bucket 1 along inwall.This whirlwind sedimentation dedusting can be removed 85% above dust.The flue gas rotary that reduces dust content rises, enter in the housing 3, owing between bar-shaped negative electrode 11 and positive plate 4, exist high voltage electric field, dust is ionized in the flue gas, it is adsorbed by positive plate 4 that the overwhelming majority forms anion, and the vibrating device 8 that is located at the top produces vibration, and the dust on the positive plate 4 is fallen in the ash bucket 1, this is an electrostatic precipitation, makes dust content reduction in the flue gas

In the high-voltage electrostatic field, the oxygen molecule (O in the flue gas ₂) be ionized decomposition, generate ozone (O ₃), the ozone with extremely strong oxidisability with the sulfide in the flue gas, nitride oxidation, generates sulphur and nitrogen oxide.At this moment, spray ejection chemical substance such as absorbents such as ammonia, lime the pipe 6 from absorbent, with above-mentioned oxide reaction, chemical combination generates as sulphur ammonium, ammonium nitrate, calcium carbonate, calcium nitrate and so on material, forms solid particle, falls into ash bucket.This process is the chemical method desulfurization removing nitric, and flue gas is further purified, and desulfurization removing nitric reaches more than 90%, reaches national specified discharge standard fully.Flue gas after being purified is discharged from air outlet 7.

Claims

1. dry desulfurization denitrification dedusting device, it is characterized in that: in deduster housing one side, the tangential air inlet of installing is by the straight-through bottom of spiral helicine backspin runner ash bucket, in the ash bucket upper body, tubular positive plate and corresponding with it bar-shaped negative electrode are installed, high-pressure forms the high-voltage electrostatic field, on housing top between the two, the spraying pipe and the air outlet that can spray chemical absorbent are arranged, and case top is equipped with vibrating device and explosion-protection equipment.