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Desulfurization gypsum drying and calcining production process

A technology for desulfurization gypsum and production process, applied in the field of gypsum treatment, can solve the problems of inability to realize heat recycling, increase of human, material and financial resources, heat loss to the environment, etc., and achieve the effects of improving dust removal effect, stabilizing thermal efficiency and avoiding environmental pollution

Inactive Publication Date: 2014-12-10
ZHENGZHOU DINGLI DRYING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, for desulfurization gypsum drying and calcining equipment, but in the prior art, the drying equipment and calcining equipment are separated, occupying space, and one more storage and transshipment operation is required, which will cause a large increase in manpower, material and financial resources. It will cause heat loss and environmental pollution; the equipment is separated, resulting in the two sets of drying and calcination processes being carried out separately, which cannot realize the recycling of heat

Method used

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  • Desulfurization gypsum drying and calcining production process
  • Desulfurization gypsum drying and calcining production process
  • Desulfurization gypsum drying and calcining production process

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Desulfurization gypsum drying and calcining equipment, such as figure 1 , 2 As shown in the figure, it includes a post-combustion hot gas generator as a heat source (here specifically refers to a post-combustion hot gas generator with a patent number of 201210302219.8) 1, a drying drum 3, a calcining drum 2, a screw conveyor 7, a belt conveyor 6, The first screw feeder 501, the second screw feeder 502 and the induced draft fan 4, the described afterburning hot gas generator and the calcining drum are connected through the hot air pipe 8; The double-layer drum of the first layer, the lifting plate set in the inner layer drum 301 is opposite to the inclination direction of the lifting plate set in the outer layer drum 302, and the outer layer drum is 1 meter longer than the inner layer drum, at the distance from the end of the drying drum (that is, end B in the figure) the position of 1 meter is the end of the inner drum, the lifting plate of the inner drum is inclined d...

Embodiment 2

[0034] Desulfurization gypsum drying and calcining equipment, such as figure 2 , 3 As shown, the difference from the first embodiment above is that the equipment also includes a cyclone dust collector 9 and a bag filter 10, the calcining drum is connected to the gas inlet of the cyclone dust collector, and the gas outlet of the cyclone dust collector is connected to the bag filter The gas inlet of the filter is socketed, and the gas outlet of the bag filter is socketed with the air inlet of the induced draft fan.

[0035] The operation process of the heat source is as follows: the heat source generated in the continuous combustion hot gas generator first enters the calcining drum through the hot air pipe. After the calcining drum is calcined, the induced draft of the induced draft fan generates wind pressure, so that the exhaust gas enters the cyclone dust collector for dust removal, and then in the The dust is further removed in the bag filter, and finally the pure and dust-f...

Embodiment 3

[0038] Desulfurized gypsum drying and calcining production process, the process uses desulfurized gypsum drying and calcining equipment to make desulfurized gypsum into β hemihydrate gypsum, and the desulfurizing gypsum drying and calcining equipment is the desulfurized gypsum drying and calcining equipment described in Example 1, here No more details, the steps of the process are as follows:

[0039] Step S01: the belt conveyor pre-conveys the desulfurized gypsum to the first screw feeder, and the first screw feeder feeds the desulfurized gypsum into the inner drum of the drying drum;

[0040] Step S02: The subsequent combustion hot gas generator supplies the heat source for the calcining drum, and the heat source in the calcining drum is pumped into the drying drum by the induced draft fan;

[0041] Step S03: drying the desulfurized gypsum in the inner drum of the drying drum, the drying temperature is 200°C, the drying time is 60 minutes, and the product after drying is des...

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Abstract

The invention relates to desulfurization gypsum drying and calcining equipment for drying and calcining the desulfurization gypsum to obtain high-quality beta hemihydrate gypsum, and a production process. The equipment comprises a drying drum, a calcining drum and an induced draft fan, wherein an air inlet of the induced draft fan is communicated with the calcining drum; an air outlet of the induced draft fan is communicated with the tail end of the drying drum; the front end of the drying drum is in butt joint with a first feeder and a second conveyor; the first feeder is in butt joint with a first conveyor; the second conveyor is in butt joint with a second feeder; the second feeder is in butt joint with the calcining drum; and a heat source supply furnace is communicated with the calcining drum through a hot air pipe. Two pieces of equipment of a drying process and a calcining process are combined, so the problems about transfer and storage of intermediate products are solved, space is saved, and environmental pollution caused by the intermediate products is avoided; and meanwhile, the induced draft fan is used for leading calcining waste gas in the calcining drum to the drying drum to serve as a heat source for drying the desulfurization gypsum, so the waste gas is reutilized and resources are saved.

Description

technical field [0001] The invention relates to the field of gypsum treatment, in particular to desulfurized gypsum drying and calcining equipment and a production process for obtaining high-quality β hemihydrate gypsum after drying and calcining the desulfurized gypsum. Background technique [0002] With the increasing awareness of environmental protection, my country's control over the emission of sulfur dioxide in coal-fired flue gas is becoming more and more stringent, and desulfurization of power plants is imperative. At present, the most widely used flue gas desulfurization and the most mature technology is the limestone / gypsum wet desulfurization process. The average sulfur content of the coal used by the unit is 1.23%, and the average desulfurization efficiency reaches 92.5%. Incrementally, at present, the country can reduce sulfur dioxide emissions by 2.3 million tons per year, and the amount of desulfurized gypsum waiting to be treated is more than 10 million tons....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B11/02
Inventor 李留纪罗刚银张志宇周云飞薛艳芬朱甲哲刘彦辰符新国
Owner ZHENGZHOU DINGLI DRYING EQUIP
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