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Double-hearth shaft kiln and calcining method

A double-chamber shaft kiln and shaft kiln technology, which is applied in the field of industrial furnaces and kilns, can solve problems such as affecting the calcining quality of products, failure of calcining materials, and deviation of hot air flow.

Pending Publication Date: 2020-10-13
MCC CAPITAL ENGINEERING & RESEARCH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, with the increase of the cross-sectional size of the kiln, it is easy to form a biased flow of hot air in the kiln, especially at the corner of the vertical kiln and the channel to form a dead zone of hot air, so that the materials in the dead zone cannot be fully absorbed. Calcination, which affects the calcined quality of the product

Method used

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Embodiment Construction

[0024] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0025] like Figure 1 to Figure 3 As shown, the embodiment of the present invention provides a double-chamber shaft kiln, including a first shaft kiln 1 and a second shaft kiln 2 with the same structure and symmetrically arranged, the first shaft kiln 1 includes a middle kiln chamber 12, and the middle kiln chamber 12 The cross section of is a regular polygon with more than five sides, and the side wall of the middle kiln chamber 12 of the first shaft kiln 1 is connected with the side wall of the middle kiln chamber 12 of the second shaft kiln 2 .

[0026] The side wall of the middle kiln chamber 12 of the first shaft kiln 1 and the side wall of the middle kiln chamber 12 of the second shaft k...

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Abstract

The invention provides a double-hearth shaft kiln and a calcining method. The double-hearth shaft kiln comprises a first shaft kiln body and a second shaft kiln body which are the same in structure and are symmetrically arranged, wherein the first shaft kiln body comprises a middle kiln hearth, the cross section of the middle kiln hearth is a regular polygon with five or more edges, and the side wall of the middle kiln hearth of the first shaft kiln body is connected and communicated with the side wall of the middle kiln hearth of the second shaft kiln body. The double-hearth shaft kiln has the beneficial effects that alkaline steam in the kiln can quickly and directly enter the second shaft kiln from a connecting channel formed in the communicating position of the side walls of the middlekiln hearths, steam cannot be condensed on quick lime, and any hard crusting phenomenon is prevented from occuring on the connecting channel.

Description

technical field [0001] The invention relates to the technical field of industrial furnaces, in particular to a double-chamber shaft kiln and a calcination method. Background technique [0002] The double-chamber shaft kiln adopts the advanced co-current regenerative calcination principle. Parallel flow means that the combustion-supporting air, fuel, and materials all flow downward from the upper part of the calcination zone, and the three flow in the same direction, and the materials realize gradient combustion, thereby avoiding overburning. Heat storage means that the flue gas produced by calcination enters another kiln chamber through the flue to preheat the preheated material so that the heat can be fully recovered. The thermal characteristics of co-current calcination and counter-current heat storage determine that the double-chamber kiln has high thermal efficiency, and its thermal energy consumption is the lowest among all types of lime kilns such as rotary kiln and s...

Claims

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Application Information

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IPC IPC(8): C04B2/12
CPCC04B2/12
Inventor 田辉段国建全强孟凯彪王艳民王得刚冯燕波岳杰
Owner MCC CAPITAL ENGINEERING & RESEARCH
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