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Device and method for preparing composite activator clinker by using semi-dry-method desulfurized ash and application of clinker

A semi-dry desulfurization and compound excitation technology, which is applied in the restoration of polluted soil, etc., can solve the problems of low utilization efficiency of desulfurization ash, complicated treatment process, high treatment cost, etc., and achieve strong pozzolanic ash reactivity and excitation performance, and process connection Good performance, improved utilization efficiency and added value

Active Publication Date: 2020-03-06
安徽省融工博大环保技术材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the existing semi-dry desulfurization ash oxidation treatment method, such as high treatment cost, relatively complicated treatment process or relatively low utilization efficiency of desulfurization ash, and provide a semi-dry method using sintering, coal power, etc. Device and method for preparing compound activator clinker from dry desulfurization ash and application of the clinker

Method used

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  • Device and method for preparing composite activator clinker by using semi-dry-method desulfurized ash and application of clinker
  • Device and method for preparing composite activator clinker by using semi-dry-method desulfurized ash and application of clinker
  • Device and method for preparing composite activator clinker by using semi-dry-method desulfurized ash and application of clinker

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Embodiment 1

[0043] A device (sintered desulfurization ash oxidation treatment device) for preparing composite activator clinker using semi-dry desulfurization ash in this embodiment includes a shaft furnace 1, such as figure 2 As shown, the shaft furnace 1 includes a shaft furnace body 11, and the top of the shaft furnace body 11 is provided with a furnace cover 12, a feed port 110 and an exhaust gas discharge port 111, and its inner furnace includes a preheating section 112 distributed sequentially from top to bottom. , dehydration section 113, deep oxidation section 114, calcium hydroxide activation section 115 and discharge section 118, and the bottom of calcium hydroxide activation section 115 is provided with air disperser 116, and this air disperser 116 is connected with high-temperature air intake pipe.

[0044]The sintered desulfurization ash (semi-dry desulfurization ash produced in the sintering process, hereinafter referred to as "sintered desulfurization ash"), expanded perlit...

Embodiment 2

[0047] A device for preparing compound activator clinker using semi-dry desulfurization ash in this embodiment is basically the same in structure as in Embodiment 1, the difference mainly lies in that the cooler 13 of this embodiment adopts a grate cooler, and the bottom of the shaft furnace The discharged material is transported to the grate cooler through the hot clinker inlet 131, and the cold air is passed into the grate cooler through the cold air inlet 132 to cool the clinker. After cooling to room temperature, the composite activator clinker product obtained is cooled. Clinker outlet 133 is discharged. The hot blast outlet 134 of the grate cooler is connected to the air inlet 151 of the hot blast stove 15, and the air outlet 152 of the hot blast stove 15 is connected to the air diffuser 116 through the high-temperature air intake pipe. The hot air generated after heat exchange with the hot clinker in the grate cooler is heated by the hot blast stove 15 (using the waste ...

Embodiment 3

[0051] A method for preparing composite activator clinker using semi-dry desulfurization ash in this embodiment comprises the following steps: weighing respectively according to the mass ratio: sintering desulfurization ash, 95%; expanded perlite particles, 5%; and accounting for desulfurization Ash mass 50% water for batching. First add the desulfurized ash and water into the mixer to mix, and stir to form a slurry, then add expanded perlite to the slurry for stirring, the stirring time is 5 minutes, the stirring speed is 15 rpm, and the mud is formed after mixing well. Then the mud is taken out, and the mud is extruded into circular segment-shaped raw meal particles with a diameter of 10mm with an extrusion granulator, and it is first dried with a dryer to a green body with a certain strength (cylinder compressive strength 0.5MPa ), then add in the shaft furnace among the embodiment 2 and carry out deep oxidation reaction operation, reaction comprises: preheating, mud materi...

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Abstract

The invention discloses a device and method for preparing a composite activator clinker by using semi-dry-method desulfurized ash and an application of the clinker, and belongs to the technical fieldof metallurgy and flue gas desulfurization. The method comprises the following processes: proportioning semi-dry-method desulfurized ash, expanded perlite and water according to a mass ratio, and sequentially stirring, mixing, granulating and drying, to obtain desulfurized ash raw material particles; then carrying out segmented heating treatment on the dried desulfurized ash raw material particlesby high-temperature air; sequentially preheating and drying the desulfurized ash raw material particles, carrying out CaSO3 oxidization, carrying out Ca(OH)2 dehydration activation reaction, and carrying out sufficient reaction and cooling to obtain the composite activator clinker mainly composed of CaSO4, CaO and SiO2. By adopting the device and method, CaSO3 in the semi-dry-method desulfurizedash can be fully oxidized, the utilization efficiency and additional value of the oxidized desulfurized ash are effectively improved, and the treatment process is simple and low in cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and coal-fired power flue gas desulfurization, and in particular relates to a device and method for preparing composite activator clinker from semi-dry desulfurization ash produced by sintering and coal-fired power plants and the application of the clinker. Background technique [0002] In recent years, China's economy has developed rapidly, and the industry's demand for coal is increasing day by day. Coal combustion typically produces large amounts of SO 2 gas, the greater the consumption of coal, the more SO 2 More and more, thus creating increasingly serious acid rain pollution, which has caused great harm to the ecological balance and economic and social development on which human beings depend. Based on this, in recent years, the state has increased the SOE of major coal-fired enterprises 2 emission control efforts, and the SO 2 The reduction of the emission rate has put forward higher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B40/00B09C1/00
CPCC04B40/0046B09C1/00C04B22/143C04B22/064C04B14/06
Inventor 樊传刚郭小雨李健生樊鲁倩樊曦李家茂
Owner 安徽省融工博大环保技术材料研究院有限公司