Sleeve type double-hearth shaft kiln

Abstract

The invention relates to the field of roasting kilns and in particular relates to a sleeve type double-hearth shaft kiln. The sleeve type double-hearth shaft kiln is characterized in that inner sleeves are respectively arranged at the centers of two kiln hearths; the upper ends of the inner sleeves are hinged to the upper sides of the kiln hearths; the end sockets of axial positioning clamps are hinged to kiln hearth shells; the inner sleeves are of steel structure bodies from bottom to top; protection covers made of fireproof materials are built outside the inner sleeves; air channels are formed in the inner sleeves; the specification and the size of the shaft kiln are only related to a regional area of an annular section; basically, heights of a preheating region, a roasting region and the like of the kiln body are not changed along with the change of the specification of the kiln. Compared with the prior art, the sleeve type double-hearth shaft kiln disclosed by the invention has the beneficial effects that the resistance loss of the kiln body is low, the phenomenon that heat cannot be distributed uniformly in a roasting process is improved, the quality of a product is high, electric energy can be saved, and the problem in large sizes of lime and dolomite double-hearth shaft kilns is solved; the sleeve type double-hearth shaft kiln is suitable for new construction, reconstruction and extension and the technical design of the conventional kiln with the daily yield being more than 600 tons and even the daily yield being more than thousands of tons.

Description

technical field [0001] The invention relates to the field of block material roasting kilns, in particular to a sleeve-type double-chamber shaft kiln. Background technique [0002] As the output of general shaft kiln increases, its geometric size should increase according to a certain ratio. As far as the double-chamber shaft kiln is concerned, since the high-temperature gas in the roasting zone is directly exhausted or inhaled through the surrounding area, this makes the high-temperature gas In the process of downward flow or upward flow, it is far away from the center of the lower part of the roasting zone, resulting in insufficient heat supply in this part and underfiring. The larger the equivalent diameter of the kiln, the more obvious the phenomenon. In order to compensate for this defect, the roasting zone can only be increased. Therefore, the height of the kiln body of the existing shaft kiln is related to the diameter of the cross section of the kiln chamber, and the ...

AI Technical Summary

Problems solved by technology

[0002] As the output of general shaft kiln increases, its geometric size should increase according to a certain ratio. As far as the double-chamber shaft kiln is concerned, since the high-temperature gas in the roasting zone is directly exhausted or inhaled through the surrounding area, this makes the high-temperature gas In the process of downward flow or upward flow, it is far away from the center of the lower part of the roasting zone, resulting in insufficient heat supply in this part and underfiring. The larger the equivalent diameter of the kiln, the more obvious the phenomenon. In order to compensate for this defect, the roasting zone can only be increased. Therefore, the height of the kiln body of the existing shaft kiln is related to the diameter of the section of the kiln chamber, and the specification of the shaft kiln generally needs to keep the height-to-diameter ratio constant

[0003] In this way, the problems brought are that the kiln body is too high, the resistance loss is large, the heat distribution between the center and the periphery is uneven, and the material roasting time is too long to affect the product quality. With the increase of the kiln diameter, the installation of the cantilever spray gun and the spray gun protection It is also very difficult, which hinders the development of the shaft kiln to a large scale

Images