CN2193198Y - Double-bed desulphurization dust remover - Google Patents

Abstract

The utility model relates to a double-bed desulphurization dust remover for smoke. The utility model adopts the combined structural form of a fluidized bed and a feeding bed, the fluidized bed is arranged at a lower layer, and the feeding bed is arranged at an upper layer. The fluidized bed is used for the primary purification of smoke, the feeding bed is used for the further purification of smoke, and the advantages of two beds are mutually complemented. Therefore, the utility model has high purification efficiency, dust removing efficiency is more than 98 %, and desulfurizing efficiency is between 80 % and 95 %. The utility model having simple structure, low cost, high loading adaptability and easy management is suitable for present the desulfurization and dust removal of smoke. Smoke purified by the double-bed desulphurization dust remover for smoke can achieve present environmental protection discharge standard.

Description

Double-bed desulphurization dust remover

This utility model relates to a kind of flue gas purifying equipment that is used for environmental protection, particularly a kind of double bed type heat desulfurizing dust-collector.

Contain a lot of dusts and pernicious gas in the flue gas, atmospheric environment has been caused pollution.For the protection atmospheric environment, in environmental regulation, emission of harmful substances in the flue gas there is certain restriction.The most serious harmful substance has flue dust and sulfur dioxide pernicious gas in the flue gas.Be to reduce the discharging of flue dust and sulfur dioxide gas, the protection atmospheric environment require the desulfurizing dust-collector product to have purification efficiency height, manufacturing process is simple, cost is low, equipment resistance is little performance, and operation maintenance is simple, and load adaptability is strong.The applicant's last utility model patent (93231936.7)---fluidized bed gas clarifier has possessed purification efficiency height, manufacturing process is simple, cost is low, equipment resistance is little performance, and dedusting and desulfurization simultaneously one finish.But discovery in service is when actual motion air quantity off-design air quantity is big, because of the fluid effect variation of fluid bed influences clean-up effect.For overcoming this defective, the utility model proposes a kind of double bed type desulfurizing dust-collector.This novel desulfurizing dust-collector has adopted the double bed structure of fluid bed and packed bed combination.Because of packed bed has stronger adaptive capacity to load, thereby ensure this novel product except that having the advantage that the fluidized bed gas clarifier had, also possessed stronger load performance.In addition, the combination of fluid bed and packed bed, its mutual supplement with each other's advantages.Fluid bed has high purification efficiency can prevent the obstruction of packed bed; Packed bed has load performance preferably, can compensate the deficiency of fluid bed to the load adaptability difference.Should point out that simultaneously packed bed has the deep purifying effect to flue gas, has ensured high purification efficiency.

The utility model is realized by following manner: this desulfurizing dust-collector has adopted the double bed version of fluid bed and packed bed combination.Its structure composition mainly contains: air-intake device, air-distribution device (fluidized bed plant), filling batch, cleaning solution jet pipe, demister and housing.The air-distribution device that is positioned at lower floor is divided into uniform thread to flue gas, and makes the cleaning solution fluidisation, and under the fluidized state of cleaning solution, cleaning solution fully mixes, contacts with flue gas, has guaranteed that flue gas obtains abundant washing, purifying.In the fluidized-bed layer on air-distribution device, most dust and sulfur dioxide pernicious gas have obtained removing.The upper strata of desulfurizing dust-collector is a filling batch, filler is the anti-corrosion material of soakage, at uniform washing liquid film on the filler or between filler, be covered with membranaceous cleaning solution, when flue gas is flowed through packing layer, flue gas flows along the filler slit, fully contact, promoted the adhesion of dust and liquid film, strengthened the reaction of cleaning solution and sulfur in smoke gas with the washing liquid film; Packed bed has played the effect of deep desulfuration and dedusting; Thereby guaranteed that this kind desulfurizing dust-collector has very high efficient.Flue gas behind the deep purifying of the fluidization wash of fluidized-bed layer and filling batch, remove droplet in the flue gas through demister after, discharge deduster, thereby finished the desulfurization and dedusting process.The cleaning solution that desulfurization and dedusting is used is sprayed onto packed bed top through shower, in packed bed flows to the fluid bed of lower floor, after overflow pipe is discharged to mortar bucket.Be that flue gas and cleaning solution have formed reverse flow generally, this is one of expedite of high purification efficiency.

The utility model has adopted fluidization and packed bed technology, collection mixing, gravity, collision, inertia, soak, convection current and purification by diffusion mechanism and one, formed the technical characterictic that dust removal process that the fluid bed purification mechanism combines with the packed bed purification mechanism and sweetening process are carried out simultaneously.The fluidisation air-distribution device (fluid bed) of desulfurizing dust-collector bottom has constituted architectural feature of the present utility model with the optimum organization of the filling batch on top.The packed bed that present technique adopted has two class materials: earthfill rockfill concrete riprap RCC and silk screen.

Narrate implementation process of the present utility model below in conjunction with Figure of description:

Fig. 1 is a structural representation of the present utility model.Description of drawings: 1-plasma discharge mouth; The 2-mortar bucket; The 3-air inlet; The 4-housing; 5-air distribution plate (fluidizer); The 6-filling batch; 7-cleaning solution shower; The 8-demister; The 9-exhanst gas outlet.

According to Fig. 1 operation principle of the present utility model is described below: flue gas enters air compartment from air inlet, enter housing (fluid bed) by air distribution plate, according to the fluid bed principle, on air distribution plate, be furnished with many tiny wind holes, during gas process air distribution plate, air-flow is divided into uniform thread, and make the cleaning solution on the air distribution plate obtain fluidisation, the formation gas-liquid two-phase flows, promoted gas-liquid fully to mix contact, at collision, inertia, soak, under the comprehensive function of convection current and purification by diffusion mechanism, removed dust and sulfur dioxide gas in most of flue gas.Because the fluidization of gas-liquid has been strengthened greatly liquid transmission and the transmission of diffusion matter, and strengthened the effect of soaking, make the dust in the flue gas and pernicious gas is easier is dissolved in the liquid.So far, finish the primary stage of gas cleaning, in this stage, removed most of dust and part sulfur dioxide gas.

Flue gas after the fluidisation washing enters packed bed (packing layer).Packing layer is made up of the stronger filler of immersion property, between the slit of filling surface and filler, formed liquid film, the surface area of liquid film is increased greatly, thereby strengthened the contact area of flue gas and cleaning solution, strengthened the matter diffusion strength, promoted absorption and the reaction of cleaning solution, strengthened deep removal sulfur dioxide to sulfur dioxide in flue gas; On the other hand, exist irregular slit in the packing layer, the flue gas break-in is worn the crack when flowing through, and under the effect of the surface force of collision, centrifugal force, inertia force and liquid film, thin dirt residual in the flue gas is further held back, thereby efficiency of dust collection is improved greatly.Packing layer has constituted the deep purifying stage of flue gas.Moreover in the space up and down of packing layer, splashing and spraying of cleaning solution constituted additional catharsis.

Flue gas behind the washing, purifying is discharged through air outlet after demister removes water smoke.Cleaning solution spreads on the packing layer equably from shower, is carrying from top to bottom in packing layer under the pollutant pouring, in the fluid bed of going forward side by side (on the air distribution plate), after the fluidisation washing, carries more pollutant and enters the mortar bucket discharge through overflow pipe.

The packing layer that the utility model relates to also can adopt screen net structure except that can adopting corrosion resistant filler.Demister has two kinds of versions: tortuous board-like shutter or screen net structure.

It is that fluid bed, upper strata are the combining structure of packed bed that the utility model adopts lower floor, has gathered the characteristics of fluid bed and packed bed, has complementary advantages, and make it have very high purification efficiency: efficiency of dust collection is greater than 98%, and desulfuration efficiency reaches (80-95) %. And have stronger load performance, particularly when underload, still have very strong clean-up effect. The flue gas that purifies through this novel product reaches present environmental emission standard.

Claims (2)

1, a kind of double bed type heat desulfurizing dust-collector, its structure is mainly formed to be had: air distribution plate (fluidizer), filling batch, demister, shower, mortar bucket and housing, it is characterized in that being provided with in the desulfurizing dust-collector fluid bed and packed bed, promptly lower floor is for forming the air distribution plate (fluidizer) of fluid bed fluidised form form in desulfurizing dust-collector, and the upper strata is provided with the filling batch with deep purifying effect.

2, double bed type heat desulfurizing dust-collector according to claim 1 is characterized in that packed bed has two kinds of structure composition forms: filler and silk screen.