A checker brick hot stove grate board device

Abstract

The present invention proposes a grate plate device for a checker brick regenerator type hot blast stove for blast furnaces, which includes a horizontal layer composed of a flat splitter plate, arranged on the support grate plate assembly; the support grate plate assembly consists of It consists of grate boards and hollow supporting columns with ventilation holes. Each transparent hole on the flat splitter plate expands upward, or appears in the form of a collection of upwardly expanding channels; the transparent hole on the grate plate either has a vertical partition wall, or has a partition wall that gradually widens downward along the length of the hole. The application of the present invention can greatly reduce the metal consumption, simplify the production and manufacture of the flat splitter plate and the support grate plate assembly, and greatly improve the utilization factor of the hot blast stove. The present invention can also be used in other technical fields that utilize gas exchange for heat exchange, such as directly or indirectly heated flame furnaces for metal heat treatment, boiler devices for thermal power stations and industrial enterprises, and the like.

Description

technical field [0001] The invention relates to a grate plate device for a hot blast stove or a combustion furnace in the field of metallurgy. Background technique [0002] At present, the most commonly used grate structure for most large and medium-sized blast furnace hot blast stoves is a flat-bottomed grate device with beams. This structure is supported by beams arranged in a well-shaped arrangement at the lower part of the grate, and each grate is fixed. On the beam, there is a pillar support under the beam; the grate plate holes of this structure have various shapes, mainly petal-shaped, round, square (rectangular, rhombus). This kind of grate board device generally lays checker bricks directly on the grate board. In addition, there is also an improved device, which is to add a transitional grate block with the same structure as the checker brick. The sub-blocks are laid on the grate board, and then the checker bricks are laid on the transitional grate block (Wang Ying...

AI Technical Summary

Problems solved by technology

[0005]However, after a long-term operation test, the shortcomings of the first type of grate plate device are very obvious: firstly, the stability of the grate plate combination device is poor, The strength of the grate plate with large hole size (such as square shape, petal shape, etc.) is reduced, and there is a risk of fracture and damage in long-term operation; this kind of grate plate has a complicated structure after assembly, and it is difficult to ensure sufficient installation accuracy. The structural stress is difficult to eliminate due to operation; the beams and columns block the holes of the grate plate, which creates great resistance to the gas flow and reduces the efficiency of the hot blast stove; the structural stress between the grate plates fixed together by the beam will gradually accumulate, resulting in Overall deformation of the grate assembly; its disadvantage also manifests itself in the increased likelihood of clogging of the holes of the small hole grate assembly due to clay checker brick debris and dust in the stove

For the checker bricks in the regenerator of the hot blast stove with different hole sizes, the structure of the transitional grate plate also needs to be changed accordingly, which increases the difficulty of manufacturing and makes it difficult to carry out standardized design

[0006] The main defect of the second type of grate board device is that it increases the difficulty of manufacturing the grate board, and also increases the weight of a single grate board

Because the shape of the grate plate close to the furnace shell is relatively complicated, the structure of its reinforcing rib is correspondingly complicated

However, this device has not made substantial improvements to the transitional grate block (that is, the splitter plate) on the grate plate.

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