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Method and device for preparing dry desulfurizing agent by using carbide slag

A dry desulfurization and preparation device technology, applied in separation methods, chemical instruments and methods, calcium/strontium/barium oxides/hydroxides, etc., can solve the problems of high chloride ion concentration, complex system, poor economy, etc. Achieve the effect of simple process flow, less engineering investment and low production cost

Active Publication Date: 2010-12-01
FUJIAN LONGKING DSDN ENGINEERING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former is difficult to adjust the pH value of the calcium carbide slag slurry and the concentration of chloride ions is high, resulting in high failure rates of system corrosion, fouling, blockage, and equipment wear; while the latter will cause the quality of the absorbent to decline during the drying process of calcium carbide slag, and the drying system High energy consumption, complex system and poor economy

Method used

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  • Method and device for preparing dry desulfurizing agent by using carbide slag
  • Method and device for preparing dry desulfurizing agent by using carbide slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: the quality of carbide slag is: Ca(OH) 2 The content is 66%, and the water content is 30%. The quality of the quicklime powder is: the CaO content is 65%, and the particle size is ≤1mm; the ratio of calcium carbide slag and quicklime powder is 1:1. Calcium carbide slag enters the quantitative feeder through the feeding funnel for weighing, and after weighing, it is sent to the pre-mixer through the belt conveyor for preliminary mixing and crushing with the quicklime quantitatively added after the quicklime bin, screw feeder and belt weighing machine . The uniformly mixed material enters the calcium carbide slag humidity setting machine. After the calcium carbide slag humidity setting and quicklime digestion reaction in the humidity setting machine for 60 minutes, the slaked lime powder is obtained. 2 Content 80%.

Embodiment 2

[0024] Embodiment 2: the quality of carbide slag is: Ca(OH) 2 The content is 60%, and the water content is 35%. The quality of the quicklime powder is: the CaO content is 85%, and the particle size is ≤1mm; the ratio of calcium carbide slag and quicklime powder is 1:0.4.

[0025] Calcium carbide slag enters the quantitative feeder through the feeding funnel for weighing, and after weighing, it is sent to the pre-mixer through the belt conveyor for preliminary mixing and crushing with the quicklime quantitatively added after the quicklime bin, screw feeder and belt weighing machine . The uniformly mixed material enters the calcium carbide slag humidity setting machine. After the calcium carbide slag humidity setting and the quicklime digestion reaction are carried out in the humidity setting machine for 60 minutes, the obtained slaked lime powder has the following qualities: 95% of the slaked lime has a particle size of less than 125um, a water content of 0.27%, and Ca(OH) 2 ...

Embodiment 3

[0026] Embodiment 3: similar to embodiment 1, the difference is that the proportioning of calcium carbide slag and unslaked lime powder is 1: 0.8.

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Abstract

The invention discloses a method and a device for preparing a dry desulfurizing agent by using carbide slag, and relates to a dry desulfurizing agent. The invention provides a dry desulfurizing agent preparation device with low equipment investment, low running cost and pollution avoidance and a preparation method for the dry desulfurizing agent. The device is provided with a carbide slag weighing device, a carbide slag conveying device, a calcined lime weighing device, a calcined lime conveying device, a pre-mixing crushing device and a humidity setting device; the discharge hole of the carbide slag weighing device is connected with the feeding hole of the carbide slag conveying device, and the discharge hole of the carbide slag conveying device is connected with the feeding hole of the pre-mixing crushing device; the discharge hole of the calcined lime weighing device is connected with the feeding hole of the calcined lime conveying device, and the discharge hole of the calcined lime conveying device is connected with the feeding hole of the pre-mixing crushing device; and the discharge hole of the pre-mixing crushing device is connected with the feeding hole of the humidity setting device, the bottom of the humidity setting device is provided with a slaked lime discharge hole, and the top of the humidity setting device is provided with an exhaust port. Carbide slag and calcined lime powder are premixed to obtain a solid mixture, and carbide slag humidity setting and calcined lime digestion are performed to obtain slaked lime powder.

Description

technical field [0001] The invention relates to a dry desulfurizer, in particular to a method and a device for preparing a dry desulfurizer from calcium carbide slag. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose synthetic resins. PVC production mainly includes calcium carbide method and ethylene method. In my country, calcium carbide method is the main method, and its output accounts for about 70% of the total PVC output. According to the statistics of relevant departments, in 2008 my country's PVC production capacity was 15.81 million tons, and the output was 8.82 million tons. The main component of carbide slag is Ca(OH) 2 , is the industrial waste produced by the calcium carbide method. According to experience, 1.5 to 1.6 tons of calcium carbide is consumed for the production of 1 ton of PVC products, and 1.2 tons of calcium carbide slag (dry basis) is produced per ton of calcium carbide. Carbide slag is usually discharged on...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/50C01F11/02
Inventor 陈宗华张原郑进朗詹威全王建春饶益龙章俊华
Owner FUJIAN LONGKING DSDN ENGINEERING CO LTD
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