CN2319767Y

CN2319767Y - High temp. waste heat generating kiln with preheater

Info

Publication number: CN2319767Y
Application number: CN 97232278
Authority: CN
Inventors: 郭红军; 赵静山
Original assignee: Kebang Building Material Tech
Current assignee: Kebang Building Material Tech
Priority date: 1997-12-16
Filing date: 1997-12-16
Publication date: 1999-05-19
Anticipated expiration: 2007-12-16

Abstract

The utility model relates to a high temperature waste heat generating kiln with a charge end preheater, which comprises a rotary kiln, a fume chamber, and a cooling machine, wherein the fume chamber and the cooling machine are connected with the rotary kiln; an exhaust blower and a turbine generator are connected with a waste heat boiler; the waste heat boiler is communicated with a charge end; a rear row blower is connected with a first level cyclone barrel; the first level cyclone barrel, a second level cyclone barrel, a third level cyclone barrel, a fourth level cyclone barrel and a fifth level cyclone barrel are successively connected. The utility model is characterized in that the bottoms of the five cyclone barrels are communicated with the rotary kiln through unloading pipes; the air inlets on the upper parts of the five cyclone barrels are communicated with the cooling machine through hot air pipes. The utility model can improve production yield by 1-4 times under the condition of no adding energy consumption. The utility model can regulate productive output or electricity generation quantity.

Description

The high-temperature residual heat generating kiln of band preheater

The utility model belongs to cement rotary kiln equipment, relates generally to the rotary kiln of kiln tail preheater and high-temperature residual heat generating.

The rotary kiln of prior art band TRT, because of domestic low-temperature electricity-generating technology does not pass a test, so all adopt the high temperature generation technology, promptly boiler temperature is at 800～850 ℃ high temperature.The rotary kiln of this band boiler of power generation by waste heat, all be that 800～850 ℃ the high-temperature gas that utilizes the kiln tail to come out carries out cogeneration, the rotary kiln of this band cogeneration, all be to adopt the hollow kiln, the yielding poorly of kiln is though can ensure most electricity consumption of self production line because of generating, reduce production costs, but whole system is big because of the generating equipment investment, and causes productivity effect on the low side.

The purpose of this utility model provides a kind of output that improves rotary kiln, improves the high-temperature residual heat generating kiln of the band preheater of its generating effect.

Kiln tail smoke-box and cooler that the utility model comprises rotary kiln, links to each other with rotary kiln, exhaust blower is connected with waste heat boiler with steam turbine generator, waste heat boiler communicates with the kiln tail of rotary kiln, back exhaust blower links to each other with one-level whirlwind tube, one-level whirlwind tube, secondary whirlwind tube, three grades of whirlwind tubes, Category Four cyclone tube and five-stage whirlwind tubes link to each other successively, the bottom that it is characterized in that the five-stage whirlwind tube communicates with rotary kiln by tremie pipe, and its top air inlet communicates with cooler by warm-air pipe.

On five-stage whirlwind tube of the present utility model and the warm-air pipe that rotary kiln links to each other dore furnace can be set, the dore furnace bottom links to each other with warm-air pipe, and the tremie pipe of Category Four cyclone tube communicates with the top of the material-strewing device that is positioned at dore furnace.

The utility model can improve 1～4 times of the output of rotary kiln, and can easier regulate output or generated energy under the situation that does not increase energy consumption.

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

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the structural representation of the utility model embodiment band dore furnace;

Among Fig. 1, go into the kiln raw material under the effect of exhaust blower 1, in the increase in pipeline by lifting device feeding secondary whirlwind tube 3, and heated by ascending air, bring in the one-level whirlwind tube 2, after in one-level whirlwind tube 2, carrying out gas solid separation, the raw material powder drops to the increase in pipeline of three grades of whirlwind tubes 4 from the discharge gate of one-level whirlwind tube 2, in pipeline by ascending air once more behind the heat temperature raising, be brought in the secondary whirlwind tube 3, after in secondary whirlwind tube 3, carrying out gas solid separation, the raw material powder drops to the increase in pipeline of Category Four cyclone tube 5 from the discharge gate of secondary whirlwind tube, in pipeline by ascending air further after the heating, be brought in three grades of whirlwind tubes 4, after in three grades of whirlwind tubes 4, carrying out gas solid separation, the raw material powder enters the increase in pipeline of five-stage whirlwind tube 6 from the discharge gate of three grades of whirlwind tubes, be brought in the Category Four cyclone tube 5, after in the Category Four cyclone tube, carrying out gas solid separation, the raw material powder enters into warm-air pipe 8 from the discharge gate of Category Four cyclone tube, be brought at last in the five-stage whirlwind tube 6, raw material decompose more than 40% in the five-stage whirlwind tube, carry out gas solid separation after, the material powder enters in the rotary kiln 10 from the tremie pipe 7 of five-stage whirlwind tube, further decomposition combustion.In rotary kiln 10, behind the coal dust firing that sprays into from kiln hood, the thermal current of generation makes the calcium carbonate in the kiln raw material all finish decomposition, enters cooler 9 cooling backs from kiln hood and discharges through burning till the back.800～850 ℃ of waste gas in that rotary kiln 10 internal combustion produce enter waste heat boiler 12 by kiln tail smoke-box 11, make the water generates steam in the boiler, promote steam turbine generator 14 generatings.Waste gas after the cooling is drawn after exhaust blower 13 is discharged in waste heat boiler 12.

Present embodiment only increases by a cover four or a five-stage cyclone preheater at the kiln tail of former cogeneration kiln, the air inlet of afterbody whirlwind tube sucks hot blast by pipeline the raw material powder is heated from cooler, make the resolution ratio of raw material powder reach 45～55%, thereby improved output greatly.In addition,, there are two cover exhaust treatment systems to control separately, are easy to control production scale and production is managed the waste gas of preheater and waste heat boiler.

Among Fig. 2, raw material enter dore furnace 15 from the discharge gate of Category Four cyclone tube 5, to expect that by material-strewing device 16 powder scatters, and dispelled by thermal current from the warm-air pipe 8 that communicates with dore furnace 15 bottoms, simultaneously, the heat that is produced by the coal dust firing that sprays into by coal powder injection device 17 is heated to rapidly about 850 ℃, makes the calcium carbonate decomposition rate in the raw material powder reach 85%, the back is brought in the five-stage whirlwind tube 6 by the ascending air in the stove, and all the other are with embodiment 1.

Under the situation that present embodiment is motionless at former cogeneration kiln kiln tail, waste heat boiler is motionless, generator is motionless, above former kiln tail or a side increase the cyclone preheater of a cover band dore furnace, divide the bottom of boiler to be connected with the cooler of kiln hood with warm-air pipe.Can make former design output 20.8T/H, the rotary kiln of actual power amount 2000KW/H reaches output 75T/H, the ability of generated energy 3000KW/H, and the ton investment of incremental productive capacity only is 20% of former ton production capacity investment.

Claims

1, a kind of high-temperature residual heat generating kiln with preheater, comprise rotary kiln (10), kiln tail smoke-box (11) that links to each other with rotary kiln (10) and cooler (9), exhaust blower (13) is connected with waste heat boiler (12) with steam turbine generator (14), waste heat boiler (12) communicates with the kiln tail of rotary kiln (10), last exhaust blower (1) links to each other with one-level whirlwind tube (2), one-level whirlwind tube (2), secondary whirlwind tube (3), three grades of whirlwind tubes (4), Category Four cyclone tube (5) links to each other successively with five-stage whirlwind tube (6), the bottom that it is characterized in that five-stage whirlwind tube (6) communicates with rotary kiln (10) by tremie pipe (7), and its top air inlet communicates with cooler (12) by warm-air pipe (8).

2, the high-temperature residual heat generating kiln of band preheater according to claim 1, it is characterized in that on five-stage whirlwind tube (6) and the warm-air pipe (8) that rotary kiln (10) links to each other dore furnace (15) being set, the dore furnace bottom links to each other with warm-air pipe, and the tremie pipe of Category Four cyclone tube (5) communicates with the top of the material-strewing device that is positioned at dore furnace (15) (16).