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Phosphogypsum calcining system

A phosphogypsum and calcination technology, applied in the field of calcination treatment system, can solve the problems of large occupied area, secondary pollution, small output, etc., and achieve the effect of reducing floor space, reasonable and compact layout, and high production efficiency

Inactive Publication Date: 2019-08-06
ZHENGZHOU SUNDY BUILDING TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Phosphogypsum is an industrial by-product in the production process of phosphorus chemical enterprises. Because it contains various components, it cannot be directly used in construction. Enough for building construction; in the calcination process of phosphogypsum, the most primitive is to use steamers, frying pans and other equipment, the efficiency is low, the quality of the produced hemihydrate gypsum powder is unstable, the output is small, and it cannot Adapt to large-scale industrial production; waste of energy will cause secondary pollution; with the advancement of phosphogypsum calcination technology, its calcination equipment has also improved. At present, most of the calcination furnaces are used for calcination. The phosphogypsum is processed separately in the permanent kiln, which has low energy utilization rate, many links, and occupies a large area of ​​the site

Method used

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  • Phosphogypsum calcining system

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Embodiment Construction

[0016] In order to further illustrate the technical solution of the present invention, the specific implementation manner of the present invention is now described in conjunction with the accompanying drawings, as figure 1 In this example, a double-barrel rotary calciner with a diameter of 3 meters that is common in this industry is selected as the calciner 1, and it is installed on the installation base of the calciner; 2. Install the flame-injection furnace 2 at the feed port end of the calciner 1, and ensure that the fire-injection direction faces the open end of the inner cylinder of the calciner 1; in this example, a thin-walled steel pipe commonly used in the industry is selected as the front dust collector The return pipe 3, the front dust collector return pipe 3 is installed between the front dust collector 2 and the calciner 1, one end is connected to the discharge port of the collecting bin of the front dust collector 2, and the other end is connected to the calciner ...

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Abstract

A phosphogypsum calcining system belongs to the field of phosphorous gypsum calcination, and includes a calcining furnace, a fire spraying furnace, a front deduster material returning tube, a settlingchamber, a front deduster, an air duct from the front deduster to a preheating furnace, the preheating furnace, an air duct from the preheating furnace to a rear deduster, the rear deduster, an air duct form the rear deduster to a reducing furnace, the reducing furnace, a material discharging air duct, an air duct from the settling chamber to the front deduster, and an induced draft fan. The phosphogypsum calcining system has the characteristics of compact structure, energy reuse, small occupied area and high thermal efficiency.

Description

technical field [0001] The invention belongs to the field of calcination of phosphogypsum, in particular to a calcination treatment system for converting phosphogypsum into building gypsum after calcination. Background technique [0002] Phosphogypsum is an industrial by-product in the production process of phosphorus chemical enterprises. Because it contains various components, it cannot be directly used in construction. Enough for building construction; in the calcination process of phosphogypsum, the most primitive is to use steamers, frying pans and other equipment, the efficiency is low, the quality of the produced hemihydrate gypsum powder is unstable, the output is small, and it cannot Adapt to large-scale industrial production; waste of energy will cause secondary pollution; with the advancement of phosphogypsum calcination technology, its calcination equipment has also improved. At present, most of the calcination furnaces are used for calcination. Phosphogypsum is...

Claims

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Application Information

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IPC IPC(8): C04B11/036
CPCC04B11/036
Inventor 赵嘉珩赵建纲
Owner ZHENGZHOU SUNDY BUILDING TECH
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