CN87107725A - Industrial smoke purifying and device - Google Patents

Abstract

The invention provides a kind of industrial flue gas cleaning equipment.Promptly remove other pernicious gases in the flue gas simultaneously at the removal dust.Be characterized in that spraying the liquid that contains chemical substance in the terminal nozzle of flue washs flue gas, thereby reach the purpose that purifies flue gas.Simple in structure, cost is low, small investment, good purification, uses easy to maintenancely, is applicable to various tonnage boilers.Toxic gases such as carbon monoxide, sulfur dioxide, nitrogen oxide and dust all there is better clean-up effect.

Description

The present invention relates to administer the method and apparatus of noxious industry flue gas, particularly relate to and use the method and apparatus that contains chemical substance fluid purification industrial smoke.

The modern industry development is discharged into the industrial smoke in the atmospheric environment, becomes the main root of atmosphere pollution.Comprise harmful poisonous gases such as dust, sulfide, nitrogen oxide, carbon monoxide in the industrial smoke, become the main root of industrial malicious mist, acid rain.Electrostatic method, cloth bag method, whirlwind method are being arranged aspect the dust removing, and method such as moisture film spray, and the pernicious gas in removing smoke is not still had the practical and effective method and apparatus.

Task of the present invention provides a kind of method of administering the noxious industry flue gas, promptly removes other pernicious gas in the flue gas simultaneously in dedusting, reaches the purpose of purifying industrial smoke.

Task of the present invention realizes with following technical method: the method for the washing soup purifying industrial smoke by containing chemical substance, its main feature is that industrial smoke is imported in the eddy current washing chamber, to wash medical liquid spraying and be vaporific, foam-like and be full of the eddy current washing chamber, the washing soup comprises oxidant, surfactant and the water that period 4 major-minor family metal oxide and compound are formed.It is filled a prescription by weight, and water is 100 parts, and oxidant is 0.1-0.35 part, and surfactant is 0.1-0.25 part, and foaming agent is 0.05-0.2 part.

The device that designs for method of the present invention is such: the main feature by comprising the flue purifier of boiler that motor 1, water pump 2, nozzle 3, flue 4, blast pipe 7, backwater skewed slot 8, return pipe 9, sedimentation basin 10, medical solution pool 11 formed is that water pump and nozzle are medium-pressure or high pressure, its nozzle places flue not hold, constitute a pressure-reducing chamber 5, nozzle is the soup that vaporific ejection has absorption and oxidability.Also available compressed air siphon soup sprays to the eddy current washing chamber.

Air-flow barrier plate 12 with porous is installed in eddy current washing chamber 6.

The injection direction of nozzle and flow of flue gas direction are and are not more than 90 ° angle in the pressure-reducing chamber.

Below the invention will be further described: flue gas imports that flue gas flow rate and pressure reduce greatly behind the eddy current washing chamber, flue gas fully mixes with the washing soup of the show bubble that is full of the eddy current washing chamber and contacts, be equivalent to the foam barrier that flue gas is formed through soup, make flue gas obtain crossing fully Lu and washing, this method demonstrates fully among the industrial flue gas cleaning equipment by this viewpoint design.

Below this device is described further: will wash soup by motor 1 driving medium-pressure or high pressure water pump 2 and at full speed be vaporific ejection from nozzle 3, nozzle places the not end of flue 4, nozzle is one or more, the injection direction of nozzle and flow of flue gas direction are and are not more than 90 ° angle, thereby cause negative pressure, this partly constitutes pressure-reducing chamber 5, helps the burner hearth air and flows and also to help chimney is shortened greatly.The rear portion, pressure-reducing chamber is eddy current washing chamber 6, and the air-flow barrier plate 12 of porous is housed in the eddy current washing chamber, and the effect of air-flow barrier plate is cleaning solution fully to be mixed with flue gas contact, to reach the cleaning function of absorption dust and oxidation pernicious gas.Because washing contains foaming agent in the soup, thus in the eddy current washing chamber main show bubble, and match with surfactant, reach washing, purifying effect to flue gas.Make it to meet the industrial smoke discharge index.Flue gas after being purified is discharged by blast pipe 7.The washing soup flows into return pipe 9 by backwater skewed slot 8, enters sedimentation basin 10, and the soup that the dust in the soup is deposited in bottom, top flows into medical solution pool 11, begins new cyclic process again.The soup periodic replacement of medical solution pool adds new soup.The washing soup is by oxidant, surfactant, foaming agent and water are formed, its weight proportion is: water is 100 parts, oxidant is 0.1-0.35 part, surfactant is 0.1-0.25 part, foaming agent is 0.05-0.2 part, and oxidant is period 4 major-minor family metal oxide or compound, as manganese dioxide, potassium permanganate, calcium oxide, cupric oxide, ferrous sulfide etc.Surfactant is lauryl sodium sulfate and neopelex etc.

The present invention is compared with the prior art simple in structure, low, the small investment of cost, and good purification is used easy to maintenancely, is applicable to the boiler of various tonnages.Compare with existing spray process dust arrester, be characterized in having adopted middle pressure high-pressure nozzle spraying at a high speed soup, its direction and flow of flue gas direction are and are not more than 90 ° angle.Do not hold at flue like this and cause negative pressure, help replenishing of boiler furnace fresh air.Prove the boiler to various tonnes by experiment, this covering device can replace the very high chimney of tall and big cost fully.Drag losses is little, and whole dust arrester drag losses is not more than 65 millimeters of water.

By detecting, this covering device is installed on the Industrial Boiler, and its dust purifying rate is more than 85%, and carbon monoxide (CO) purifying rate is more than 90%, sulfur dioxide (SO ₂) purifying rate is more than 90%, nitrogen oxide (NO _x) purifying rate be more than 70%, toxic and harmfuls such as other hydrocarbon, benzene class are also had clean-up effect preferably.Easy to install, soup is with low cost.Soup consumption and boiler are tonne proportional, about each tonne changed a soup with 1 ton of soup, an about week, and converted expenses is that level per ton is weekly about 8 yuan like this, therefore also have better economic benefit, be easy on various types of Industrial Boilers, promote the use of.

Accompanying drawing is the boiler soot purifying device schematic diagram.

Narrate specific embodiments and embodiment below.SLH/G type smoke purification equipment is 4 tons of horizontal hot water space heating boiler designs of chain.Motor 1 is 4 kilowatts, and water pump is 1 1/2, and " centrifugal pump, flow are 6 meters ³/ hour, lift is 69 meters, and the shower nozzle spray cone angle is 40-50 °, and nozzle injection direction and flue gas flow direction are 90 °, cause negative pressure, are the flue gas drainage, improve the burner hearth burning condition.Be provided with two air-flow barrier plates that have some holes in the eddy current washing chamber, both guaranteed the even contact of flue dust and soup, to reach washing and catharsis flue gas.The blast pipe combustion gas.The eddy current washing chamber divides into the backwater skewed slot, and released liquor flows into sedimentation basin through backwater skewed slot, return pipe.Soup is to add oxidant, surfactant, foaming agent to make in water, with water is 100 parts, oxidant is formulated mixtures such as manganese dioxide, potassium permanganate, calcium oxide, ferrous sulfide, cupric oxide, addition is 0.1-0.35 part, surfactant is lauryl sodium sulfate, neopelex etc., and addition is 0.1-0.25 part.Foaming agent is 0.05-0.2 part.This equipment is used for 4 tons of boilers.Series of products can be selected to 2 to 30 tonnes of boilers and use.Clean-up effect meets the relevant discharging mark of country and puts.Dust removal efficiency reaches 85%, and the purging sulfur dioxide rate reaches 93%, and nox purification rate is 77%, and the carbon monoxide purifying rate is 95%, and lingemann blackness is 0-1.

Claims (5)

1, a kind of method of the washing soup purifying industrial smoke by containing chemical substance, it is characterized in that industrial smoke is imported in the eddy current washing chamber, to wash medical liquid spraying and be vaporific, foam-like is full of the eddy current washing chamber, and the washing soup comprises oxidant, surfactant, foaming agent and the water that period 4 major-minor family metal oxide and compound are formed.

2, method according to claim 1 is characterized in that washing liquid formula by weight, and water is 100 parts, and oxidant is 0.1-0.35 part, and surfactant is 0.1-0.25 part, and foaming agent is 0.05-0.2 part.

3, method according to claim 1, a kind of industrial flue gas cleaning equipment that comprises that motor 1, water pump 2, nozzle 3, flue 4, blast pipe 7 are formed, its characteristics are:

A. also comprise, pressure-reducing chamber 5, eddy current washing chamber 6, backwater skewed slot 8, return pipe 9, sedimentation basin 10, soup pond 11 and air-flow barrier plate 12,

B. water pump 2 and nozzle 3 are medium-pressure or high pressure water pump and nozzle,

C. nozzle 3 places the end of flue 4, constitutes pressure-reducing chamber 5,

D. be provided with the air-flow barrier plate 12 of porous in the eddy current washing chamber 6.

4, device according to claim 1 is characterized in that the medical liquid spraying direction of nozzle in the pressure-reducing chamber and flow of flue gas direction are to be not more than 90 ° angle.

5, equipment according to claim 3, the compressed air of washing soup that has been siphon that it is characterized in that nozzle ejection.