CN2222886Y

CN2222886Y - Kiln rear flue gas cooler

Info

Publication number: CN2222886Y
Application number: CN 95209316
Authority: CN
Inventors: 刘志惇; 何基堤; 李福州
Original assignee: Wuhan Building Material Ind Design Inst State Building Material Ind Bureau (
Current assignee: Wuhan Building Material Ind Design Inst State Building Material Ind Bureau (
Priority date: 1995-04-20
Filing date: 1995-04-20
Publication date: 1996-03-20
Anticipated expiration: 2005-04-20

Abstract

The utility model relates to a kiln rear flue gas cooler, which is suitable for the miniature dry process of the kiln rear flue gas of cement kilns and can be comprehensively utilized. The utility model comprises a tower body and a hot flue gas inlet, wherein a discharge pipe is positioned inside the tower body, a cooling arrangement is positioned around the discharge pipe, a spiral-flow dust collector is connected with the outlet end of the discharge pipe, the discharge pipe is provided with an auxiliary blower, and a flue gas outlet and a material outlet are respectively positioned on the lower end of the spiral-system dust collector. The utility model has good cooling performance and a compact structure, and can provide hot water and hot air by making full use of the residual heat which is produced by flue gas. Meanwhile, the utility model has a stronger dust removal function and provides a favorable operating condition for the next lower level dust removal.

Description

The kiln exit gas cooler

The utility model relates to a kind of kiln exit gas cooler that is applicable to that small-sized dry-process cement rotary kiln kiln exit gas is handled and can be fully utilized.

The general temperature of dry-process cement rotary kiln kiln exit gas is 320-380 ℃, before entering kiln tail blower fan and dust-precipitator, flue-gas temperature must be cooled to below 150 ℃, otherwise will cause the damage of equipment, at present, dual mode is generally adopted in the cooling of this flue gas, a kind of is to carry out humidifying cooling with conditioning Tower, another kind is to adopt the cooling coil heat radiation, the former needs large-scale equipment and water injector, and cost is higher, and the latter requires area of dissipation big, also need to dispose the big equipment of appearance structure, in addition, the said equipment is thrown into a large amount of heats in the air, has also caused the waste of the energy.

Task of the present utility model is to avoid the weak point of above-mentioned existence and a kind of kiln exit gas cooler that can make full use of waste heat and have dedusting function is provided.

Task of the present utility model is realized by following scheme: have a tower body 18, the tower body upper end is provided with hot gas approach 1, be installed on comb 4 in the tower body, comb disposes cooling device outward, the port of export at comb 4 connects a spiral-flow type dust-precipitator, and configuration accessory fan 12, the lower end of spiral-flow type dust-precipitator is set up exhanst gas outlet 16 and material outlet 17 separately.

Press such scheme, described cooling device can be water-cooling apparatus, air cooling radiator cooler or water-air cooling radiator cooler.

According to such scheme, during work, the high-temperature flue gas that the kiln tail is discharged is entered in the cooler by gas approach 1, flow into comb 4 via tower body top air chamber 2, under the effect of cooling device, with cooling medium (water, gas) carry out heat exchange, hot flue gas is cooled off by heat absorption fully in comb, temperature drops to below 150 ℃, and this moment, the medium in the cooling device then constantly absorbs heat in flowing and is heated to form hot water or hot gas, discharge the usefulness of back for production or life, simultaneously, cooled smoke continues to flow and enter the spiral-flow type dust-precipitator, under the effect of accessory fan 12, part of smoke is drawn out of along circumferential passageway, spray at a high speed from tangential spout again, the air-flow that whole flue gas in the dust-precipitator is drawn out of with high velocity jet drives the formation eddy flow, the dust that makes considerable part in the ash-laden gas in action of centrifugal force to being separated, discharge from material outlet 17, the flue gas after preliminary purification is then discharged by exhanst gas outlet 16, enters the next stage dust removal process.The utility model compared with prior art has the advantage of following aspect: 1, comb has been adopted the reinforcement type of cooling, improved the heat exchanger effectiveness of cooler, made complete machine structure trend compactness and miniaturization; 2, produce via cooling device and hot water hot gas is provided, made full use of the waste heat in the useless flue gas, have energy-conservation effect; 3, be provided with the spiral-flow type dust-precipitator in the bottom of cooler, have higher dust collection rate, this not only makes gas cooler increase a new function, and has created good operating mode for the dedusting of next stage bag, thereby improves the dust removing effects of entire equipment.

Fig. 1 is the structure chart of an embodiment of the utility model, and arrow is represented air-flow and water (flow) direction among the figure.

Fig. 2 is the A-A cutaway view among Fig. 1.

Fig. 3 is the B-B cutaway view among Fig. 1.

An embodiment of the present utility model such as Fig. 1, shown in 2, has a tubular tower body 18, the tower body top offers hot gas approach 1, air chamber 2 is arranged at tower body top, be installed on air-distribution device 3 in the air chamber, so that cigarette wind is evenly distributed in tower body, avoid producing the dust stratification phenomenon of blocking, in tower body air chamber 2 below be installed on through-type comb 4, leave certain clearance between each comb, the comb two ends are provided with capping, make the comb outside form a sealed space, offer water supply connector 9 and hot water joint 10 in the both sides of tower body, and be connected with the sealing space, for preventing the short circuit of current, also can install baffle plate 8 in the space between comb, constitute water-cooling apparatus, in addition, as required, also the seal cavity of water-cooling apparatus can be separated, epimere is provided with an air cooling radiator cooler outside comb, like this, can be the hot-air that provides about 200 ℃ is provided, the air cooling radiator cooler includes inlet suction port 6, set baffle plate 8 between hot-air joint 7 and comb, gas, water-cooling apparatus is by lateral partitions 5 seal isolation, its big I in space is separately pressed water, the heat exchange ratio and the demand of gas medium are set, smoke outlet at comb 4 is connected with a spiral-flow type dust-precipitator, its structure is: have one with tower body 18 joining housings 19, housing second line of a couplet taper ash bucket 20, above housing, be provided with the circumferential passageway 11 of scroll casing shape, be connected with the suction end of accessory fan 12, below circumferential passageway 11, be provided with tangential spout 13 along the air draft passage direction, the input of this tangential spout is connected with the exhaust end of accessory fan 12, the spacer body 14 in one band tapering also is installed above the middle part of housing, in taper ash bucket 20, be installed on and overlap 15 in the taper, circumferential uniform spiral type blade 21 of cover and the corresponding gas channel of offering in the taper, cover 15 and the inwall of the taper ash bucket spacing of being separated by in the taper, compile particulate dust in order to sedimentation, its lower end and material outlet 17 join, and the inner space of taper spacer 15 then is connected with exhanst gas outlet 16.

Claims

1, a kind of kiln exit gas cooler, has tower body (18), the tower body upper end is provided with hot gas approach (1), it is characterized in that in tower body, being installed on comb (4), comb disposes cooling device outward, the port of export at comb (4) connects a spiral-flow type dust-precipitator, and configuration accessory fan (12), and the lower end of spiral-flow type dust-precipitator is set up exhanst gas outlet (16) and material outlet (17) separately.

2, by the described kiln exit gas cooler of claim 1, it is characterized in that air chamber (2) is arranged at tower body top, is installed on air-distribution device (3) in the air chamber.

3, by claim 1 or 2 described kiln exit gas coolers, it is characterized in that described cooling device is a water-cooling apparatus.

4, by the described kiln exit gas cooler of claim 3, it is characterized in that epimere is provided with an air cooling radiator cooler outside comb (4), gas, water-cooling apparatus are by lateral partitions (5) seal isolation.

5, by claim 1 or 2 described kiln exit gas coolers, it is characterized in that being installed in the space between comb (4) baffle plate (8).

6, by claim 1 or 2 described kiln exit gas coolers, the structure that it is characterized in that the spiral-flow type dust-precipitator is: have one with the joining housing of tower body (18) (19), housing second line of a couplet taper ash bucket (20), above housing, be provided with the circumferential passageway (11) of scroll casing shape, be connected with the suction end of accessory fan (12), be provided with the tangential spout (13) of suitable air draft passage direction in the below of circumferential passageway (11), the input of this tangential spout is connected with the exhaust end of accessory fan (12), the spacer body (14) in one band tapering also is installed in the top, middle part of housing (19), in taper ash bucket (20), is installed on cover (15) in the taper.