CN1210965A

CN1210965A - Method for reforming five-stage cyclone preheater using predecomposition technology

Info

Publication number: CN1210965A
Application number: CN 97106089
Authority: CN
Inventors: 赵静山; 郭红军; 赵吉刚; 赵砚铠
Original assignee: Kebang Building Material Tech Co Ltd Zibo City
Current assignee: Kebang Building Material Tech Co Ltd Zibo City
Priority date: 1997-09-08
Filing date: 1997-09-08
Publication date: 1999-03-17

Abstract

In available five-stage cyclone preheater one off-line vertical decomposing furnace is installed on one side of the fifth cyclone cylinder or is used to replace the fifth cyclone cylinder or the rising flue connected to the fifth cyclone cylinder. At the same time, air hose, coal sprayer and material spreader are installed successively on the decomposing furnace. The present invention has the advantages of raising preheating efficiency of cyclone preheater and the decomposing rate of material in kiln, reducing the discharge block at the discharge port and preventing encrustation, raising efficiency and production, and reducing heat loss.

Description

Transform the method for five-stage cyclone preheater with using predecomposition technology

The invention belongs in the cement industry grog calcination process the remodeling method of preheating device, specifically is a kind of method of transforming five-stage cyclone preheater with using predecomposition technology.

The five-stage cyclone preheater system that prior art is used in cement industry grog calcination process, generally be that the five-stage whirlwind tube uprightly is composed in series, with rotary kiln when supporting, easily cause the hear rate height of rotary kiln, yield poorly, the cement clinker quality instability, defectives such as running rate is low, and the blanking pipeline of five-stage cyclone preheater itself easily stops up, skinning, labor strength is big in the operating process, from the raw material that five-stage cyclone preheater comes out, resolution ratio has only about 40%, and hear rate is up to 1400Kcd/Kg.cl.

The purpose of this invention is to provide a kind of preheating predecomposition theory of utilizing, the pre-thermal efficiency by transform improving cyclone preheater and material go into the kiln resolution ratio, improve the blanking clogging of discharge gate, the running rate height, reduce hear rate, improve the method with using predecomposition technology transformation five-stage cyclone preheater of output.

The present invention is achieved by the following technical solutions:

It is a kind of method of transforming five-stage cyclone preheater with using predecomposition technology, comprise one-level whirlwind tube, secondary whirlwind tube, three grades of whirlwind tubes, Category Four cyclone tube and five-stage whirlwind tubes, whirlwind tubes at different levels are uprightly installed successively, the discharge gate of five-stage whirlwind tube connects rotary kiln, its transformation is in a side of existing five-stage whirlwind tube the off-line dore furnace to be installed uprightly, the top of dore furnace links by the air inlet of pipeline and five-stage whirlwind tube, dore furnace links by the discharge gate of pipeline and Category Four cyclone tube, and airduct, coal powder injection device and material-strewing device are installed on the dore furnace successively.

The described method of transforming five-stage cyclone preheater with using predecomposition technology, can also substitute existing level V whirlwind tube with dore furnace, the top of dore furnace is communicated with by the air inlet of pipeline with the Category Four cyclone tube, the bottom of dore furnace communicates by the discharge gate of pipeline with three grades of whirlwind tubes, the discharge gate of the bottom of dore furnace and Category Four cyclone tube all is communicated with rotary kiln, and airduct, coal powder injection device and material-strewing device are installed on dore furnace successively.

The described method of transforming five-stage cyclone preheater with using predecomposition technology, can also be the uptake flue that leads to level V whirlwind tube from existing rotary kiln, substitute with dore furnace, the pre-portion of dore furnace is communicated with by the air inlet of pipeline with the five-stage whirlwind tube, the bottom of dore furnace communicates by the discharge gate of pipeline with the Category Four cyclone tube, the discharge gate that the bottom of dore furnace and five-stage whirlwind are logical all is communicated with rotary kiln, and airduct, coal powder injection device and material-strewing device are installed on dore furnace successively.

The present invention has compared with prior art adorned the off-line dore furnace or level V whirlwind tube has been substituted with dore furnace because of the side at the whirlwind tube increases, and on dore furnace, airduct has been installed successively, coal powder injection device and material-strewing device, so have the following advantages:

That 1, improves the pre-thermal efficiency of cyclone preheater and material goes into the kiln resolution ratio.

2, improve the blanking clogging of discharge gate, not skinning.

3, running rate height reduces hear rate, improves output.

The present invention compared with prior art can make the output of rotary kiln be enhanced about more than once, and the hear rate of kilogram grog is from 1400 kilocalories, be reduced to below 1000 kilocalories, and blanking pipeline obstruction, skinning no longer appear, labor strength reduces greatly, and cement clinker quality is stable.

Advance a detailed description below in conjunction with embodiment:

Embodiment 1: adopt the reforming mode that installs the off-line dore furnace in level V whirlwind tube one side additional.

Fig. 1: the embodiment of the invention 1 structural representation.

Among the figure: 1 one-level whirlwind tube, 2 secondary whirlwind tubes, 3 three grades of whirlwind tubes, 4 Category Four cyclone tubes, 5 five-stage whirlwind tubes, 6 dore furnaces, 7 material-strewing devices, 8 coal powder injection devices, 9 airducts, 10 rotary kilns

Embodiment 1 as shown in Figure 1, go in the increase in pipeline of kiln raw material by lifting device feeding secondary whirlwind tube 2, heated by ascending air, and be brought in the one-level whirlwind tube 1, after in one-level whirlwind tube 1, carrying out gas solid separation, the raw material powder drops to the increase in pipeline of three grades of whirlwind tubes 3 from the discharge gate of one-level whirlwind tube 1, here by ascending air once more behind the heat temperature raising, be brought in the secondary whirlwind tube 2, after in secondary whirlwind tube 2, carrying out gas solid separation, the raw material powder drops to the increase in pipeline of Category Four cyclone tube 4 from the discharge gate of secondary whirlwind tube 2, here further be brought in three grades of whirlwind tubes 3 after the heating by ascending air, after in three grades of whirlwind tubes 3, carrying out gas solid separation, the raw material powder enters the increase in pipeline of five-stage whirlwind tube 5 from the discharge gate of three grades of whirlwind tubes 3, here further be brought in the Category Four cyclone tube 4 after the heating by ascending air, after in Category Four cyclone tube 4, carrying out gas solid separation, the raw material powder enters off-line dore furnace 6 from the discharge gate of Category Four cyclone tube 4, after impact material-strewing device 7 is dispersed, the thermal current that is entered by the airduct 9 from off-line dore furnace 6 bottoms dispels, and a large amount of thermal currents that produced by the coal dust firing that sprays into by coal powder injection device 8 are heated to rapidly about 850 ℃, make the calcium carbonate in the raw material powder reach 85% resolution ratio, ascending air is brought in the increase in pipeline of rotary kiln 10 in the raw material pruinescence dore furnace simultaneously, enter into five-stage whirlwind tube 5, after in five-stage whirlwind tube 5, carrying out gas solid separation, the raw material powder enters in the rotary kiln 10 from the discharge gate of five-stage whirlwind tube 5, further decomposes and burns.

Embodiment 2: adopt dore furnace to substitute the reforming mode of level V whirlwind tube.

Fig. 2: the embodiment of the invention 2 structural representations.

Among the figure: 1 one-level whirlwind tube, 2 secondary whirlwind tubes, 3 three grades of whirlwind tubes, 4 Category Four cyclone tubes, 6 dore furnaces, 7 material-strewing devices, 8 coal powder injection devices, 9 airducts, 10 rotary kilns

Embodiment 2 as shown in Figure 2, go in the increase in pipeline of kiln raw material by lifting device feeding secondary whirlwind tube 2, heated by ascending air, and be brought in the one-level whirlwind tube 1, after in one-level whirlwind tube 1, carrying out gas solid separation, the raw material powder drops to the increase in pipeline of three grades of whirlwind tubes 3 from the discharge gate of one-level whirlwind tube 1, here by ascending air once more behind the heat temperature raising, be brought in the secondary whirlwind tube 2, after in secondary whirlwind tube 2, carrying out gas solid separation, the raw material powder drops to the increase in pipeline of Category Four cyclone tube 4 from the discharge gate of secondary whirlwind tube 2, here further be brought in three grades of whirlwind tubes 3 after the heating by ascending air, after in three grades of whirlwind tubes 3, carrying out gas solid separation, the raw material powder enters dore furnace 6 from the discharge gate of three grades of whirlwind tubes 3, after impact material-strewing device 7 is dispersed, the thermal current that is entered by the airduct 9 from dore furnace 6 bottoms dispels, and a large amount of thermal currents that produced by the coal dust firing that sprays into by coal powder injection device 8 are heated to rapidly about 850 ℃, make the calcium carbonate in the raw material powder reach 85% resolution ratio, ascending air is brought in the Category Four cyclone tube 4 in the raw material pruinescence stove simultaneously, after in Category Four cyclone tube 4, carrying out gas solid separation, the raw material powder enters in the rotary kiln 10 from the discharge gate of Category Four cyclone tube 4, further decomposes and burns.

Embodiment 3: the reforming mode that the uptake flue that adopts rotary kiln to link to each other with level V whirlwind tube substitutes with dore furnace.

Fig. 3: the embodiment of the invention 3 structural representations.

Embodiment 3 as shown in Figure 3, go in the increase in pipeline of kiln raw material by lifting device feeding secondary whirlwind tube 2, heated by ascending air, and be brought in the one-level whirlwind tube 1, after in one-level whirlwind tube 1, carrying out gas solid separation, the raw material powder drops to the increase in pipeline of three grades of whirlwind tubes 3 from the discharge gate of one-level whirlwind tube 1, here by ascending air once more behind the heat temperature raising, be brought in the secondary whirlwind tube 2, after in secondary whirlwind tube 2, carrying out gas solid separation, the raw material powder drops to the increase in pipeline of Category Four cyclone tube 4 from the discharge gate of secondary whirlwind tube 2, here further be brought in three grades of whirlwind tubes 3 after the heating by ascending air, after in three grades of whirlwind tubes 3, carrying out gas solid separation, the raw material powder enters the increase in pipeline of five-stage whirlwind tube 5 from the discharge gate of three grades of whirlwind tubes 3, here further be brought in the Category Four cyclone tube 4 after the heating by ascending air, after in Category Four cyclone tube 4, carrying out gas solid separation, the raw material powder enters dore furnace 6 from the discharge gate of Category Four cyclone tube 4, after impact material-strewing device 7 is dispersed, the thermal current that is entered by the airduct 9 from dore furnace 6 bottoms dispels, and a large amount of thermal currents that produced by the coal dust firing that sprays into by coal powder injection device 8 are heated to rapidly about 850 ℃, make the calcium carbonate in the raw material powder reach 85% resolution ratio, ascending air is brought into five-stage whirlwind tube 5 in the raw material pruinescence dore furnace 6 simultaneously, after in five-stage whirlwind tube 5, carrying out gas solid separation, the raw material powder enters in the rotary kiln 10 from the discharge gate of five-stage whirlwind tube 5, further decomposes and burns.

To existing five-stage cyclone preheater with above three kinds of reforming modes transformation after, the output of rotary kiln is enhanced about more than once, the hear rate of kilogram grog is from 1400 kilocalories, be reduced to below 1000 kilocalories, and blanking pipeline obstruction, skinning no longer appear, labor strength reduces greatly, and cement clinker quality is stable, and that has greatly improved the pre-thermal efficiency of cyclone preheater and material goes into the kiln resolution ratio.

Claims

1, a kind of method of transforming five-stage cyclone preheater with using predecomposition technology, comprise one-level whirlwind tube, secondary whirlwind tube, three grades of whirlwind tubes, Category Four cyclone tube and five-stage whirlwind tubes, whirlwind tubes at different levels are uprightly installed successively, the discharge gate of five-stage whirlwind tube connects rotary kiln, it is characterized in that the off-line dore furnace uprightly being installed in a side of existing five-stage whirlwind tube, the top of dore furnace links by the air inlet of pipeline and five-stage whirlwind tube, dore furnace links by the discharge gate of pipeline and Category Four cyclone tube, and airduct, coal powder injection device and material-strewing device are installed on the dore furnace successively.

2, a kind of method of transforming five-stage cyclone preheater with using predecomposition technology, it is characterized in that it being that existing level V whirlwind tube is substituted with dore furnace, the top of dore furnace is communicated with by the air inlet of pipeline with the Category Four cyclone tube, the bottom of dore furnace communicates by the discharge gate of pipeline with three grades of whirlwind tubes, the discharge gate of the bottom of dore furnace and Category Four cyclone tube all is communicated with rotary kiln, and airduct, coal powder injection device and material-strewing device are installed on dore furnace successively.

3, a kind of method of transforming five-stage cyclone preheater with using predecomposition technology, it is characterized in that it being that the uptake flue of existing rotary kiln towards level V whirlwind tube substituted with dore furnace, the top of dore furnace is communicated with by the air inlet of pipeline with the five-stage whirlwind tube, the bottom of dore furnace communicates by the discharge gate of pipeline with the Category Four cyclone tube, the discharge gate that the bottom of dore furnace and five-stage whirlwind are logical all is communicated with rotary kiln, and airduct, coal powder injection device and material-strewing device are installed on dore furnace successively.