CN2175030Y - Fluidized bed gas purification device - Google Patents

Abstract

The utility model relates to a fluidized bed gas purification device. The fluidized bed gas purification device adopts fluidized bed technique. The utility model is provided with a uniform fluidized wind-distribution plate and a casing matching with the wind-distribution plate, makes liquid and washing liquid fluidize, enhances mass transmission process, combines the mechanisms of gravity, inertia, collision, wetting and purification by diffusion together and has high purification efficiency. The utility model can simultaneously carry out dust removing and eliminating harmful gases, and has the advantages of simple structure, simple structure and high efficiency.

Description

Fluidized bed gas purification device

This utility model relates to a kind of industrial discharge gas cleaning equipment that is used for atmospheric environment protection, particularly a kind of fluidized bed gas clarifier.

Contain a lot of dusts and pernicious gas in the various discharging gas of industry; atmospheric environment has been caused pollution; be the protection environment, each advanced country of the China and the world has all stipulated strict dust and pernicious gas (as flue dust in the flue gas and sulfur dioxide etc.) discharge standard.Be to reduce emission of harmful substances, solve atmosphere polluting problem, require purifier can be simultaneously effectively dedusting and remove pernicious gas, and require that product manufacture is simple, cost is low, equipment resistance is little.Therefore, have only the clarifier product of dedusting function can not satisfy dedusting simultaneously and remove the environmental requirement of pernicious gas, the desulfation dust-extraction device of having developed at present, can not ensure simultaneously product have manufacturing process simple, purify the low and efficient height of cost, performance requirement that equipment resistance is low.The disclosed energy-saving type boiler flue-gas dust-removing and desulfurization of Chinese patent CN2111456U device has higher purification efficiency, but manufacturing process is complicated, cost is high, and operation maintenance is very loaded down with trivial details; Disclosed flue gas desulfurization dust arrester of Chinese patent CN2050932U and Chinese patent CN2110141U and self-priming waste heat alkaline gas desulfurizing dust-eliminating device, the spray eddy current atomization mode desulfurization that the former adopts not is best reactive mode, desulfurizing agent adopts ammonium hydrogencarbonate to increase the purification cost, the latter uses the steam injection desulfurization dedusting of slag alkalies not have reliable purification efficiency, and both structures are all complicated; Disclosed flue gas ash removal of Chinese patent CN2069748U and the difunctional clarifier of desulfurization are actually the combination of cyclone dust collectors and a foam scrubber, and desulfurization, dedusting are carried out step by step, and equipment is huge, cost is high, and bigger resistance is arranged.

The purpose of this utility model is to overcome the deficiency of above-mentioned prior art, and a kind of while dedusting and the new gas clarifier that removes pernicious gas are provided.This device compare with existing product have simple in structure, volume is little, low cost of manufacture, operating cost is few and purification efficiency is high characteristics.

The utility model is realized by following manner: this clarifier has adopted fluidization, and it is formed structure and mainly contains: air-intake device, air-distribution device, demister, cleaning solution jet pipe, overflow pipe and housing.Air-intake device with primary purifying function can reduce the initial dust content of air intake effectively, and its structure has cowl, whirlwind moisture film and three kinds of patterns of impact type.Air distribution plate is the critical component of clarifier, and its effect is a cloth wind, promptly the total flow point of gas is turned to many uniform threads, and sprays into cleaning solution with certain speed and direction, makes the cleaning solution fluidisation, and this is the necessary condition of washing, purifying.The function of housing is to form and keep fluidized state, reasonably the fluidization form is the abundant guarantee of high purification efficiency, shell structure of the present utility model has two kinds of forms: the first is along the housing of the variable cross-section of short transverse change of flow state design, and it two is along the constant uiform section housing of short transverse fluidised form.Have catch drip, the demister of circulatory function can remove the cleaning solution droplet in the air-flow, cleaning solution is effectively utilized, and helps the safe operation of clarifier rear fan.Demister can be arranged with the clarifier one, but also split is arranged, its structure has shutter, silk screen and three kinds of patterns of whirlwind tube.This technology also shows and adds additive in the cleaning solution, adds lime liquor or spent lye when purifying flue gas, and additive makes that to remove pernicious gas more effective, and can eliminate or alleviate the harmful substance in the sewer, prevents to cause secondary pollution.

The utility model adopts fluidization, integrates mixing, gravity, collision, inertia, soaks, convection current and purification by diffusion mechanism, forms the fluid bed purification style, constitutes its theory characteristic; Integrate dust removal process and remove the pernicious gas process, finish simultaneously, and adopt the fluidized-bed structure pattern, constituted its architectural feature.Be described in detail implementation process of the present utility model below with reference to the accompanying drawings.

Description of drawings: Fig. 1 is a structural representation of the present utility model.Fig. 2 and Fig. 3 are the structural representation of the utility model embodiment.Among the figure: 1-air inlet, 2-air compartment (air-intake device), 3-air distribution plate (bubbling plate), 4-jet pipe, 5-demister, 6-exhaust outlet, 7-housing, 8-overflow pipe, 9-blowdown tank.

According to Fig. 1 operation principle of the present utility model is described below: raw gas enters air compartment from air inlet, enters housing (fluid bed) by air distribution plate. According to the fluid bed principle, have many tiny wind holes at air distribution plate, during gas process air distribution plate, air-flow is divided into uniform thread, and make that certain thickness cleaning solution obtains fluidisation on the air distribution plate, and form gas-liquid two-phase and flow, promoted gas-liquid fully to mix contact. At collision, inertia, gravity, soak, under the comprehensive function of convection current and purification by diffusion mechanism, removed dust and the pernicious gas in the gas. Because the fluidization of gas-liquid has greatly been strengthened liquid transmission and the transmission of diffusion matter, and has been strengthened the effect of soaking, and pernicious gas and fine dusts in the gas is dissolved in the liquid effectively, thereby improved purification efficiency. Purified gas is deviate from the liquid mist through demister and is discharged by exhaust outlet. Cleaning solution sprays in jet pipe in the housing of fluid bed clarifier, forms certain thickness liquid layer at air distribution plate, and fluidisation washing in bed, and the washing soiling solution flows into the blowdown tank discharge through overflow pipe or spout hole. Housing adopts the variable cross-section design, circulation in the bed that purpose is to form best fluidization form and form cleaning solution: in the gas-liquid uphill process, increase along with sectional area, flow velocity reduces, the drop that elutriation is got up is stagnated or is fallen back on the air distribution plate, because air distribution plate overdraught speed is higher, the drop of falling may be got up by elutriation again, makes the reaction of pernicious gas and cleaning solution more abundant. The function of demister is except precipitation of liquid droplets and remove the liquid mist, be conducive to outside the safe operation of clarifier rear fan, also can form recycling of cleaning solution, cleaning solution is fully used: when demister and housing one layout, the isolated cleaning solution of demister drips back in the fluid bed, forms circulation in the bed: when demister and housing split layout, as shown in Figure 3,, be transmitted back in the fluid bed by the loopback pipe through the isolated cleaning solution of demister, consisted of the bed outer circulation; In addition, if the sedimentation basin of washing soiling solution is set, after after precipitation washing clear liquid adds additive, pumps in the clarifier again and recycle, consisted of thus the outer forced circulation of bed of cleaning solution. Cleaning solution is recycling to make the cleaning solution utilization abundant, and consumption is little, and eliminates or alleviate the washing soiling solution and discharge the secondary pollution that causes.

The utility model has multiple Variant Design.More typical embodiment has: 1, the primary purifying device is set in the air compartment under the air distribution plate, cowl as shown in Figure 2 (2), also can adopt whirlwind moisture film structure and impact type structure, its main purpose is that the gas dust content is reduced before entering fluid bed.2, as shown in Figure 2, can adopt lower fluidizing velocity in fluid bed and on the air distribution plate, at this moment fluidised form belongs to the bubbling state, and this fluid bed is called the bubbling bed.When being in the bubbling state, adopt layer cloth aerofoil (3), i.e. double bed structure.In this case, housing adopts the uiform section structure.3, as Fig. 3 institute formula, in fluid bed, adopt higher gas-liquid fluidizing velocity and higher elutriation rate, the clarifier structure adopts the constant uiform section structure of fluidized state.Demister adopts the whirlwind cartridge type, and arranges with the housing split.The cleaning solution that elutriation rises obtains separating in whirlwind cartridge type demister, and is transmitted back in the fluid bed through the loopback pipe.4, the structure of demister can adopt venetian blind type, screen type and whirlwind cartridge type, has entire arrangement and split to arrange two kinds with the connected mode of housing.Connected mode shown in accompanying drawing 1 and the accompanying drawing 2 is entire arrangement, and the connected mode shown in the accompanying drawing 3 is that split is arranged, and has adopted whirlwind cartridge type demister.

The most general purposes of the utility model is the purification of flue gas.Contain a large amount of dusts in the flue gas and based on the pernicious gas of sulfur dioxide, flue gas is the most serious pollution sources of atmospheric environment.The utility model can be effectively applied to the dedusting and the desulfurization of flue gas.Flue gas desulfurization and dedusting as boiler and industrial furnace.In this was used, additive was lime or spent lye.Desulfurizing dust-collector has been widely used at present in China.

Claims (4)

1, the fluidized bed gas clarifier comprises air-intake device, demister, cleaning solution jet pipe, overflow pipe or hole, housing and blowdown tank, it is characterized in that being provided with in the clarifier air distribution plate that makes the even threadization of Purge gas and can form and keep fluidized state and be matched to the housing of fluidized-bed structure pattern with air distribution plate.

2,, it is characterized in that the air-intake device before the air distribution plate can be arranged to have cowl structure, whirlwind moisture film structure or the impact type structure of primary purifying function according to right 1 described fluidized bed gas clarifier.

3, according to right 1 described fluidized bed gas clarifier, it is characterized in that the housing of clarifier has two kinds of structural shapes: the first changes the variable cross-section housing that is provided with according to fluidized state; It two is to keep the constant and uiform section housing that is provided with of fluidized state.

4, according to right 1 described fluidized bed gas clarifier, it is characterized in that having catch drip, the demister of circulatory function, can arrange with the housing one, but also split is arranged that its structure can be venetian blind type, screen type and whirlwind cartridge type.

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