CN2378392Y

CN2378392Y - Shaft kiln

Info

Publication number: CN2378392Y
Application number: CN99223918U
Authority: CN
Inventors: 于国强
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-23
Filing date: 1999-05-23
Publication date: 2000-05-17
Anticipated expiration: 2009-05-23

Abstract

The utility model provides a kiln body of a shaft kiln. A pipe lining is additionally arranged between an inner lining of a shaft kiln and an insulating layer of the shaft kiln. The pipe lining is a heat absorption pipe of the shaft kiln, and is also a reaction pipe of light burning magnesium (or dolomite light burning). The recovery of carbon dioxide which is decomposed can be realized. The utility model solves the problems of large fuel consumption of magnesia (or dolomite) shaft kilns, undersintering, kiln sticking, agglomeration, kiln breaking, etc., and can also cause a furnace kiln to obtain three products. The utility model has reasonable structure, low cost, simple use and simple maintenance, and is suitable for being applied to large, medium and small magnesia (or dolomite) shaft kilns.

Description

A kind of Shaft kiln

The utility model belongs to a kind of kiln of refractory materials, specifically is the kiln body of a kind of magnesia (or rhombspar) shaft furnace.

Existing magnesia (or rhombspar) shaft furnace has two kinds of coventional type (manual kiln discharge, do not take the kiln machine out of be called earth kiln) and mechanize shaft furnaces, and the kiln lining of shaft furnace has two kinds on water vapor cooling furnace lining and refractory brick.The purpose that water vapor cooling furnace lining is set is the heat that absorbs calcining zone kiln wall by means of water vapor, thereby reach the sticking kiln accident of deduction and exemption to reduce its temperature, though this furnace lining has solved sticking kiln accident preferably but thermal losses is very big, be the water pipe lining because of vaporization refrigerative kiln wall again, temperature is low, at the Yao Bichu product underburnt phenomenon is arranged; Firebrick lining is the liner of building by laying bricks or stones with refractory brick, and according to the refractory brick that the kind and the calcining temperature of product are selected corresponding material for use, fuel consumption is big, the phenomenon of underburnt though this kind bricking stove has been avoided, and the accident of sticking kiln and producing piece, canopy kiln often takes place.

It is of a great variety for the various kilns that existing magnesia unslacked kiln (or rhombspar light baking kiln) and lime are used, as long as temperature just can be decomposed when reaching 400～710 ℃ (magnesiumcarbonate), 898 ℃ (lime carbonate), but the stove of producing magnesia unslacked (or rhombspar is light-burned) at present generally still adopts the fire combustion and is directly contacted by the incinerating material, not every the combustion type of heating, the carbonic acid gas that decomposes is put into atmosphere, be atmosphere pollution, waste this raw material of carbonic acid gas again.

Problems such as magnesia (or rhombspar) shaft furnace fuel consumption is big in order to solve, underburnt, sticking kiln and producing piece, canopy kiln and carbon dioxide recovery, the utility model provides a kind of Shaft kiln that has the pipe lining.

The purpose of this utility model is achieved in that it is made up of shaft furnace liner and shaft furnace thermal insulation layer, at the shaft furnace liner, adds the pipe lining between the shaft furnace thermal insulation layer, and this bushing pipe is the decomposition reaction pipe of magnesia unslacked (or rhombspar is light-burned).

Concrete scheme of the present utility model has: be provided with effuser, vapor pipe on the pipe lining, the bottom of pipe lining is light-burned discharge port, and the top of pipe lining is light-burned opening for feed.

Pipe of the present utility model serves as a contrast concrete pattern to be had: the pipe lining is to be trapped among shaft furnace liner outside by the cylinder that two steel plates are made.

Pipe of the present utility model serves as a contrast concrete pattern to be also had: the cylinder that the pipe lining is made by two steel plates is trapped among shaft furnace liner outside, is welded with dividing plate between steel plate.

Pipe of the present utility model serves as a contrast concrete pattern to be also had: the pipe lining is to be arranged in shaft furnace liner outside by steel pipe, and is fixed by ramming mass.

The utility model is owing to add pipe and serve as a contrast between the shaft furnace liner of magnesia shaft furnace and shaft furnace thermal insulation layer, in the pipe lining is the reaction tubes of magnesia unslacked (or rhombspar is light-burned), and the carbonic acid gas that makes decomposition obtains reclaiming, make it not only solve problems such as magnesia (or rhombspar) shaft furnace fuel consumption is big, underburnt, sticking kiln and producing piece, canopy kiln, also make its a kind of stove obtain three kinds of products, it is rational in infrastructure, and cost is low, use, easy to maintenance is fit to the application of each large, medium and small magnesia (or rhombspar) shaft furnace.

Below in conjunction with accompanying drawing the utility model is done and to be specified.

Accompanying drawing 1 is a structural representation of the present utility model.

Accompanying drawing 2 is the synoptic diagram of the utility model pipe lining.

Accompanying drawing 3 is the synoptic diagram of the utility model pipe lining.

Accompanying drawing 4 is the synoptic diagram of the utility model pipe lining.

As shown in Figure 1: the utility model is by shaft furnace liner 3, shaft furnace thermal insulation layer 4 is formed, its combustion chamber, heavily burn dog-house 2, reburned magnesia discharge port 12, heavy firing kiln discharge machine 11, heavily the firing gas blower 7, shaft furnace dilatation joint 20, shell 5 grades are the same with other reburned magnesia shaft furnace, its feature is to add pipe lining 6 between shaft furnace liner 3 and shaft furnace thermal insulation layer 4, this bushing pipe 6 promptly solves the heat lost by radiation of reburned magnesia shaft furnace, it also is the reaction tubes of magnesia unslacked (or rhombspar is light-burned), the heat that shaft furnace liner 3 passes over is enough to make magnesia unslacked (or rhombspar is light-burned) material to decompose, top at pipe lining 6 is light-burned opening for feed 1, light-burned material burns opening for feed on the lenient side and knocks down, because material heating, the nitrogen that it is inner and a spot of water vapour are at first overflowed from material, discharge from the vapor pipe 19 on pipe lining 6 tops, material continues descending magnesia unslacked (or rhombspar is light-burned) and is heated and reaches certain temperature and split the carbon dioxide off from effuser 8 to gas gathering manifold 9, become liquid to become the attitude carbonic acid gas to compressor compresses again, its purity is high especially, and the bottom of pipe lining 6 is light-burned discharge ports 10.

As shown in Figure 2: the concrete structure of the utility model pipe lining has: pipe lining 6 cylinders of being made by inner layer steel plate 16,14 liang of steel plates of outer layer plate are trapped among shaft furnace liner 3 outsides.

The cylinder that pipe lining of the present utility model is as shown in Figure 3 made by inner layer steel plate 16,14 liang of steel plates of outer layer plate is trapped among shaft furnace liner 3 outsides, is welded with dividing plate 15 between steel plate, makes its pipe lining be each segmental reaction tubes 17.

Pipe lining 6 of the present utility model as shown in Figure 4 is to be arranged in shaft furnace liner 3 outsides by steel pipe 18, and fixing by ramming mass 13.

Claims

1, a kind of Shaft kiln is by shaft furnace liner (3), and shaft furnace thermal insulation layer (4) is formed, and it is characterized in that: in shaft furnace liner (3), add pipe lining (6) between the shaft furnace thermal insulation layer (4).

2, a kind of Shaft kiln according to claim 1 is characterized in that: be provided with effuser (8), vapor pipe (19) on pipe lining (6), the bottom of pipe lining (6) is light-burned discharge port (10), and the top of pipe lining (6) is light-burned opening for feed (1).

3, a kind of Shaft kiln according to claim 1 is characterized in that: the cylinder that described pipe lining (6) is made by two steel plates is trapped among shaft furnace liner (3) outside.

4, a kind of Shaft kiln according to claim 1 is characterized in that: the cylinder that described pipe lining (6) is made by two steel plates is trapped among shaft furnace liner outside, is welded with dividing plate (15) between steel plate.

5, a kind of Shaft kiln according to claim 1 is characterized in that: described pipe lining (6) is to be arranged in shaft furnace liner (3) outside by steel pipe (18), and fixing by ramming mass (13).