CN2495375Y - Circulating flow type circulation dust removing system - Google Patents

Abstract

The utility model relates to a circulating flow type circulation dust removing system which belongs to a cyclone dust removing device. The utility model is composed of two stages of circulating flow type cyclone dust collectors, wherein each stage is composed of an outer cylinder body, an inner cylinder body, a conical cylinder body, a dust discharge pipe, a seal head, an air discharge pipe and an inlet pipe. The upper end of the outer cylinder body of a first-stage is connected with a cylindrical cyclone, and the edge wall of the top part is communicated with inlet pipe of a second stage. The air discharge pipe of the second stage goes back the first stage by a blower, and is connected with the inlet pipe. Dust-laden air is removed by two stages of circulation, and powder dust lower than 0.5 mu m is removed, and the efficiency of removing dust reaches more than 98 percents. The utility model has the advantages of less investment and low cost, and is widely used for dust removing of exhaust air in the industries of a furnace, a boiler, the air channel, etc.

Description

The circulation type circulating-dedusting system

The utility model relates to cyclone dust collectors, a kind of circulation type circulating-dedusting system that utilizes the two-stage circumfluent cyclone to be connected can to remove common and little grit to 0.5～3 μ m in the dusty gas of more clearly saying so.

The ZL92106712.7 Chinese patent has been released a kind of circumfluent cyclone.This circumfluent cyclone pressure drop is low, efficiency of dust collection is high, can remove the above grit of 3.0 μ m, has been successfully applied to the dedusting of systems such as composite fertilizer's drying, gas washing in SA production, fluidized-bed reaction, and is respond well.But the grit difficulty of removing below the 3.0 μ m with it is then bigger.In some industrial discharge gas (as Industrial Stoves, boiler, flue gas etc.), it is more to contain the dust that reaches 0.5～3 μ m about 1 μ m at present.Remove this part dust, at present can be with the method for electric precipitation or bag-type dust.But the equipment investment of bag-type dust is very high, and electric precipitation is then higher, generally wants tens and even millions of unit.And, being not suitable for handling high temperature, inflammable, explosion hazard gases, bag-type dust also exists grit to stick with paste defectives such as bag easily.In a word, the dust difficulty of removing at present about 0.5～3 μ m is very big, and the cost of dedusting is also higher.

The purpose of this utility model is to overcome above-mentioned shortcoming and defect, and a kind of dust that not only can remove greater particle size is provided, and can remove the fine dusts about 0.5～3 μ m, the circulation type circulating-dedusting system that equipment investment is few, the dedusting cost is low.

In order to achieve the above object, inner barrel, the conic tube that is connected in the outer cylinder body lower end, the ash releasing tube that is connected the conic tube lower end, the end socket that is connected in the outer cylinder body top that are connected by outer cylinder body, with bracing frame and outer cylinder body concentric of the utility model, be connected in the central row tracheae on the end socket and pass the circumfluent cyclone that inlet tube was constituted that the outer cylinder body lower tangential inserts inner barrel and form.It is combined by the two-stage circumfluent cyclone actually.Adjunction one cylindrical barrel body again on the outer cylinder body of previous stage circumfluent cyclone, the top sides wall place of cylindrical shell also is connected with a rectangular tube, and this rectangular tube is the inlet tube of second level circumfluent cyclone.The blast pipe of second level circumfluent cyclone connects a blower fan, by blower fan the exhaust of secondary circulation formula cyclone dust collectors is sent in the import circulation pipe of first order circumfluent cyclone.Circulation pipe tangentially inserts the bottom of cylindrical barrel body.In other words, can also connect a cylindrical barrel body between the outer cylinder body of first order circumfluent cyclone upper end and the end socket lower end, the inlet tube of second level circumfluent cyclone is connected the top sides wall place of this cylindrical barrel body.

Operation principle of the present utility model is: carry out one-time dedusting by primary circulation formula cyclone dust collectors.The dust-laden fluid rotates rising from bottom to top, and fine dust is progressively drawn close to wall when rotation is risen.The height of column Whirlwind barrel can calculate by the stokes formula.When arriving certain altitude, 0.5 μ m above dust content in center is very low, gives meter and can reach more than 90% the removal efficient of 0.5～1.0 μ m granularity dust.Clean gas is discharged from the central row tracheae of central upper portion.Simultaneously, dust and part air-flow enter secondary circulation formula cyclone dust collectors from the limit wall under the end socket through rectangular tube and carry out two-stage dust removal.The blast pipe of secondary circulation formula cyclone dust collectors returns the inlet tube that inserts primary circulation formula cyclone dust collectors, and circulation participates in primary dust removing again.Because fine dust is not discharged from the central row gas port at primary circulation formula cyclone dust collectors top, the fine dust concentration in the circulating air improves, and two-stage dust removal can be removed a part of fine dust.Concentration reaches one regularly, forms balance.So circulation can make the efficiency of dust collection of whole system reach more than 95%, and cut diameter d50 reduces to below the 0.5 μ m.

The inlet tube of circumfluent cyclone can have a plurality of.But should rotate in the same way by its dusty gas that enters.Outlet rectangular tube on the cylindrical barrel body also is tangential.Inner barrel can have conducting element, and the rotation that helps dusty gas is risen.

Task of the present utility model comes to this and finishes.

The utility model provides a kind of can remove the little low circulation type circulating-dedusting system of grit, efficiency of dust collection height, small investment, dedusting cost to 0.5 μ m.Its efficiency of dust collection can reach more than 95%.It can be widely used in the dedusting of industrial discharge gas such as Industrial Stoves, boiler, flue gas.

Below in conjunction with embodiment and accompanying drawing thereof the utility model is done further explanation.

Fig. 1 is the structural representation of embodiment 1.

Shown in Figure 1, the rectangular tube 10 on cylindrical barrel body 5 that connects between the inner barrel 3 that the primary circulation formula cyclone dust collectors of embodiment 1 support by outer cylinder body 1, with bracing frame 2, conic tube 4, ash releasing tube 6, end socket 7, central row tracheae 8, inlet tube 9, outer cylinder body 1 upper end and end socket 7 lower ends in outer cylinder body 1 bottom and the top sides wall that is connected cylindrical barrel body 5 is formed.Connect with lid 20 between outer cylinder body 1 and the cylindrical barrel body 5.Rectangular tube 10 tangential access secondary circulation formula cyclone dust collectors, that is its inlet tube.Secondary circulation formula cyclone dust collectors are made of outer cylinder body 11, bracing frame 12, inner barrel 13, conic tube 14, ash releasing tube 16, end socket 17, blast pipe 15.Blast pipe 15 returns the part dusty gas to primary circulation formula cyclone dust collectors by blower fan 18, with circulation pipe 19 its cylindrical barrel body 5 bottoms of tangential access, circulation dedusting.

Embodiment 1 can remove common and the little dust to 0.5 μ m of particle diameter.The efficiency of dust collection that for middle footpath is the molecular sieve powder of 3 μ m can reach more than 98%, can be widely used in the dedusting of industrial discharge gas such as cement kiln, boiler, flue gas.

Claims (1)

1, a kind of circulation type circulating-dedusting system, it is by outer cylinder body, the inner barrel that is connected with bracing frame and outer cylinder body concentric, be connected in the conic tube of outer cylinder body lower end, be connected the ash releasing tube of conic tube lower end, be connected in the end socket at outer cylinder body top, be connected in the central row tracheae on the end socket and pass the circumfluent cyclone that inlet tube the constituted composition that the outer cylinder body lower tangential inserts inner barrel, it is characterized in that it is combined by the two-stage circumfluent cyclone, adjunction one cylindrical barrel body on the outer cylinder body of previous stage circumfluent cyclone, the top sides wall place of cylindrical shell also links to each other with a rectangular tube, rectangular tube is the inlet tube of second level circumfluent cyclone, the blast pipe of second level circumfluent cyclone connects a blower fan, and the inlet tube of first order circumfluent cyclone is returned and inserts in the outlet of blower fan.