Upper furnace door of clean heat recovery coke oven

Abstract

The invention provides an upper furnace door of a clean heat recovery coke oven. The upper furnace door comprises a furnace door body (1) and three detachable zigzag-form cast iron lower edges (2), wherein an arc segment is arranged on the body (1) and is provided with a semicircular groove (3), an asbestine circular rope is arranged in the semicircular groove (3), and the detachable zigzag-form cast iron lower edges (2) are connected with the furnace door body (1) through heatproof bolts. According to the invention, through improvement of the structure of the furnace door and the material of a fireproof casting layer, the sealing mode of the furnace door is changed into flexible sealing, so the problems of poor sealing, severe leakage, unorganized air supply for the coke oven and great amount of heat dissipation of current rigid surface contact are overcome, the rate of non-fully coked char is reduced, waste heat utilization and total char yield are improved, and less resources are wasted; meanwhile, frequency of replacing of the whole upper furnace door due to burnt lower edges of the upper furnace door is reduced, and it only needs to replace a burnt lower edge with the detachable zigzag-form cast iron lower edge, so economic benefits and social benefits of an enterprise can be improved.

Description

technical field [0001] The invention belongs to an upper furnace door of a coke oven, in particular to a clean heat recovery upper furnace door of a coke oven. Background technique: [0002] In 2000, the Shanxi Provincial Chemical Engineering Design Institute independently developed the QRD-2000 clean heat recovery tamping coke oven with good environmental protection effect. This furnace type is operated under negative pressure. The carbonization chamber of the furnace body is wide and high. High, strict requirements for furnace door sealing, and the technology is not yet mature, the furnace door has been sealed with a rigid hard seal, the sealing effect is poor, since it was put into operation, there has been a large amount of unorganized air intake from the furnace door, high surface temperature of the furnace door, and The upper and lower edges of the door are easy to burn and fall off, and the furnace door is frequently replaced. The vicious cycle intensifies the air int...

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Problems solved by technology

[0003] The present invention aims to solve the problems of poor sealing effect of the upper furnace door of the existing clean heat recovery tamping type coke oven, serious leakage, large heat dissipation, easy burning of the lower edge of the upper furnace door, frequent replacement of the upper furnace door, and severe coking

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