Device used for separating impurities in waste denitration catalyst and using method of device

A waste denitrification catalyst and impurity technology, which is applied in the field of devices for separating impurities from waste denitrification catalysts, and can solve the problems of unsuitable waste denitrification catalysts, dust collection and dust removal and waste catalyst particles, etc.

Inactive Publication Date: 2019-01-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the waste denitrification catalysts that damage the overall modular structure are mainly in the form of flakes, powders or broken blocks, and the waste catalyst particles are easily mixed with dust and dust.
[0006] Although the above documents are helpful to the recycling of spent denitrification catalysts, they are not suitable for spent denitrification catalysts whose integral modular structure is damaged.

Method used

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  • Device used for separating impurities in waste denitration catalyst and using method of device
  • Device used for separating impurities in waste denitration catalyst and using method of device
  • Device used for separating impurities in waste denitration catalyst and using method of device

Examples

Experimental program
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Effect test

Embodiment 1

[0058] This embodiment provides a device for separating impurities in spent denitrification catalysts, such as figure 2 shown. The device includes a feeding screening oscillation system, an ultrasonic sealing screening system and a separation circulation system connected in sequence.

[0059] The feed screening oscillation system includes a closed double-layer belt conveyor with a screen structure, which adopts a spiral arrangement and is a point vibration mode; the driving belt 2 of the belt conveyor is made of synthetic fiber screen. The lower end of the transmission belt 2 is equipped with a receiving trough 3, and the transmission belt adopts a slot-fitted and sealed receiving trough 3, and the outlet of the receiving trough 3 is connected to the impurity collection bin.

[0060] The ultrasonic closed screening system includes a cleaning box 4, an ultrasonic atomizer 5 and a sieve plate 6, wherein the cleaning box is connected to the conveyor 1 and the separation circula...

Embodiment 2

[0069] Compared with Embodiment 1, the ultrasonic airtight screening system described in this embodiment also includes a bubble generator 11, and the bubble generator 11 is arranged at the bottom of the cleaning box 4, and the schematic diagram of its specific device is as follows Figure 4 shown.

[0070] The process flow of using the device in this example to separate impurities in the spent denitration catalyst is as follows:

[0071] (1) Place the spent denitrification catalyst of the honeycomb monolithic structure with structural damage on the conveyor 1 with a screen mesh number of 100 meshes arranged in a spiral shape, the transmission distance of the transmission belt is 50m, and the spent denitrification catalyst is sheet and The powdery mixture adopts the transmission mode of continuous point vibration, and the sedimentation particle impurities are separated during the sieving transmission process. The deposition particle impurities are mainly mullite and quartz phas...

Embodiment 3

[0076] This implementation uses the same device as in Example 2, wherein the waste denitration catalyst is derived from a catalyst with a plate-shaped monolithic structure, and the process flow for separating impurities in the waste denitration catalyst is as follows:

[0077] (1) Place the waste denitration catalyst with structural damage on a conveyor 1 with a screen mesh of 40 meshes arranged in a spiral shape, the transmission distance of the transmission belt is 5m, and the waste denitration catalyst is a mixture of fragments and powders, Using the transmission mode of continuous point vibration, the deposition particles are separated and obtained. The deposition particles are mainly mullite and quartz phase structure ash, containing 45% SiO 2 and 27% Al 2 o 3 ;

[0078] (2) The waste denitrification catalyst that has been preliminarily separated in step (1) enters the ultrasonic closed screening system. The cleaning liquid of the ultrasonic closed screening system is dil...

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Abstract

The invention relates to a device used for separating impurities in a waste denitration catalyst and a using method of the device. The device comprises a feeding screening vibration system, an ultrasonic closed screening system and a separation circulation system which are connected with one another in sequence. In the technological process, the feeding screening vibration system is adopted for preliminarily separating the impurities, then the ultrasonic closed screening system is utilized for further removing soluble impurities and fly ash particles on the waste denitration catalyst, and thusthe efficiency of separating the impurities is improved; the separation circulation system is utilized for recycling cleaning liquid, and thus the impurity removal cost is reduced.

Description

technical field [0001] The invention relates to a device for separating impurities and a method thereof, in particular to a device for separating impurities in a spent denitration catalyst and a method for using the same. Background technique [0002] my country is a country with coal as the main energy supply. During the combustion of coal, a large amount of heavy metals such as smoke, nitrogen oxides, sulfur oxides, and mercury will be formed, causing air pollution and endangering human health. In order to effectively suppress the pollution of nitrogen oxides, Selective Catalytic Reduction (SCR) technology is currently the most widely used denitrification technology at home and abroad, and the core technology part is the denitrification catalyst. The catalysts widely used in the commercialization of flue gas denitrification in fixed source thermal power plants are usually installed in the denitrification device with an integral module structure. The main structures are hon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07B1/28B07B1/42B07B1/46B08B3/12B08B3/08B08B3/14B08B13/00
CPCB07B1/28B07B1/42B07B1/46B08B3/08B08B3/12B08B3/14B08B13/00
Inventor 李会泉武文粉王晨晔王兴瑞
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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