CN2398600Y

CN2398600Y - Reformed five-stage revolving-wine preheater

Info

Publication number: CN2398600Y
Application number: CN 99247398
Authority: CN
Inventors: 郭红军; 侯池水; 崔海波
Original assignee: Kebang Building Material Tech
Current assignee: Kebang Building Material Tech
Priority date: 1999-12-07
Filing date: 1999-12-07
Publication date: 2000-09-27
Anticipated expiration: 2009-12-07

Abstract

The utility model mainly relates to a cyclone preheater of a cement rotary kiln. The cyclone preheater, which comprises a cyclone cylinder, a wind outlet pipe, a blanking pipe and a kiln tail smoke chamber, is characterized in that the internal diameter of the wind outlet pipe is greater than the diameter of an inner cylinder of the cyclone cylinder; two hinges and two flap valves are vertically installed on the blanking pipe of a four-stage cyclone cylinder; a shrinkage cavity is arranged on the lower end of a rising smoke passage on the upper part of a kiln tail. The use of the utility model can make the output of an original kiln which adopts a five-stage cyclone preheater increased by 40-50%, the decomposition rate of materials fed into the kiln increased to 45-50% from the original 30%, energy consumption reduced, and the output of the kiln basically reach design performance.

Description

The reworked five-stage cyclone preheater

The utility model belongs to cement machinery, relates generally to the cyclone preheater of cement rotary kiln.

Prior art adopts the kiln of five-stage cyclone preheater that daily output 300 tons and 600 tons of two kinds of specifications, supporting Φ 2.5 * 40M and Φ 3.2 * 52M rotary kiln are respectively arranged.Though domestic have nearly various schools of thinkers enterprise to use this equipment, all do not reach designed capacity.Particularly produce the kiln of 300 tons of scales daily, should reach the designed capacity of 12.5t/h, but designing unit just is reduced to 11.5t/h when design, and only reach 9-10.5t/h in the actual production, the resolution ratio of going into the kiln material only reaches about 30%.The situation of 600 tons of scale kilns of daily output is a little better, but it is also lower to go into the resolution ratio of kiln material.Its main cause is that the pre-heat effect of cyclone preheater is relatively poor, makes the resolution ratio into the kiln material not reach requirement, has promptly influenced the output of kiln, has also increased energy consumption.

It is good that the purpose of this utility model provides a kind of pre-heat effect, goes into kiln material resolution ratio height, thereby improve the output of kiln, the reworked five-stage cyclone preheater that cuts down the consumption of energy.

The utility model comprises whirlwind tube, discharge pipe, tremie pipe and kiln tail smoke-box, it is characterized in that the diameter of discharge pipe internal diameter greater than whirlwind tube inner core, the vertical pair flap valves of installing on Category Four cyclone tube tremie pipe, the lower end that is positioned at kiln tail top uptake flue is provided with reducing.

The smoke-box that is shaped as band expansion storehouse formula of the utility model kiln tail smoke-box.The discharge pipe internal diameter of secondary～five-stage whirlwind tube is greater than the internal diameter of inner core.The uptake flue lower end cross section of close kiln tail smoke-box is less than its top cross sectional dimensions.

Employing of the present utility model can make the output of original five-stage cyclone preheater kiln improve 40～50%, and the resolution ratio of going into the kiln material is by original 30%, bring up to 45～50%, and when output improves, reduce energy resource consumption and reach 40%, the cyclone preheater SR reduces by 5～10%.By to producing the transformation of 300 tons and 600 tons kilns daily, make it reach designed capacity substantially.

The utility model is described in further detail below in conjunction with accompanying drawing:

Accompanying drawing 1 is the structural representation of the utility model embodiment;

Accompanying drawing 2 is left views of accompanying drawing 1.

Among the figure, raw material are in the raw material porch feeding discharge pipe of discharge pipe 2 settings of secondary whirlwind tube 3, disperseed by the spreading plate at the blanking point place, the high-temperature flue gas heating that raw material pruinescence after the dispersion comes out from secondary whirlwind tube inner core 13, and be brought in the one-level whirlwind tube 1, the raw material powder of not taken away at spreading point place by flue gas, the flue gas that is subjected to coming out in secondary whirlwind tube in dropping process impacts, and because the diameter of secondary whirlwind tube inner core 13 is less than the diameter dimension of discharge pipe 2, therefore, velocity of flue gas in the inner core is higher than the velocity of flue gas in the discharge pipe, form eddy current at the speed place of differing,, above secondary whirlwind tube inner core 13, taken up again and enter in the one-level whirlwind tube 1 so the material that falls is carried secretly upset by eddy current, because this speed difference, material reduces from the bleed chance of secondary whirlwind tube of increase in pipeline.Equally, the diameter of three grades of whirlwind tube inner cores 15, Category Four cyclone tube inner core 16 and five-stage whirlwind tube inner cores 18 is respectively less than its corresponding discharge pipe diameter dimension; And because blanking point moves down, material powder time of staying in increase in pipeline prolongs, and has strengthened the pre-heat effect to the raw material powder, has improved material temperature.

After the raw material pruinescence is brought one-level whirlwind tube 1 into, because the separated and collected effect of whirlwind tube, raw material pruinescence one-level whirlwind tube is accepted, enter in the discharge pipe 4 of three grades of whirlwind tubes 5 through air valve and tremie pipe 14 from discharge gate, after having experienced process same as above, enter into the discharge pipe 7 of Category Four cyclone tube 8 from the tremie pipe 6 of secondary whirlwind tube 3, in pipe, experienced after aforesaid process, the material powder enters into separated collection in three grades of whirlwind tubes 5, then from the discharge gate of three grades of whirlwind tubes 5 in tremie pipe 9 enters into the discharge pipe 17 of five-stage whirlwind tube 19, dispersed-heated, be brought into separated and collected in the Category Four cyclone tube 8, discharge gate from the Category Four cyclone tube enters in the uptake flue 20 of preheater through tremie pipe 11 and two turnover panel air valve 10 then, owing to adopted two turnover panel air valves 10, therefore the flue gas along uptake flue 20 and 11 risings of Category Four cyclone tube tremie pipe is not easy to enter into the Category Four cyclone tube, has reduced and has leaked out, and has improved the dust-collecting efficiency of Category Four cyclone tube.The material that is disperseed by material-strewing device at the total place of blanking, the high-temperature flue gas heating of being come out in rotary kiln also is brought into separated and collected in the five-stage whirlwind tube, feed opening, air valve, tremie pipe 21 through the five-stage whirlwind tube enter in the kiln tail smoke-box 22, because the expansion storehouse of kiln tail smoke-box 22 effect, the air-flow that comes out in the kiln is slowed down at this, avoid the non-uniform temperature phenomenon of kiln tail, reduced skinning.The speed that powder enters in the kiln is fast, and airborne dust is few, has reduced the leakage material phenomenon of kiln tail.Connecting of uptake flue 20 and kiln tail smoke-box 22 is convenient in reducing 12, further strengthens going into the pre-heat effect of kiln material, and can reduce improvement expenses, is convenient to operation.

The utility model makes material prolong the time of staying in preheater, has improved dispersion effect and has added thermal effect, and that has therefore also improved material goes into the kiln resolution ratio, thereby has improved the output of kiln.

Claims

1, a kind of reworked five-stage cyclone preheater, comprise whirlwind tube, discharge pipe, tremie pipe and kiln tail smoke-box, it is characterized in that the diameter of discharge pipe internal diameter greater than whirlwind tube inner core, the vertical pair flap valves of installing on Category Four cyclone tube tremie pipe, the lower end that is positioned at kiln tail top uptake flue is provided with reducing.

2, reworked five-stage cyclone preheater according to claim 1 is characterized in that the smoke-box that is shaped as band expansion storehouse formula of kiln tail smoke-box.

3, reworked five-stage cyclone preheater according to claim 1 is characterized in that the internal diameter of the discharge pipe internal diameter of secondary～five-stage whirlwind tube greater than inner core.

4, reworked five-stage cyclone preheater according to claim 2, the uptake flue lower end cross section that it is characterized in that close kiln tail smoke-box is less than its top cross sectional dimensions.