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A kind of water washing regeneration method of desulfurization catalyst

A technology for desulfurization catalysts and desulfurization zones, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of incomplete regeneration and low efficiency of carbon-based desulfurization catalysts, and achieve easy implementation, Effect of reducing flow rate and improving regeneration efficiency

Inactive Publication Date: 2019-07-12
成都中祥天宇环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above problems and provide a desulfurization catalyst regeneration method by water washing, which can effectively solve the problems of incomplete regeneration and low efficiency of carbon-based desulfurization catalysts in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The desulfurization catalyst tested in this example reaches saturation after a period of simulated flue gas desulfurization under the above conditions, and is regenerated through the following steps:

[0022] S1: Regulating valves: close the flue gas inlet and outlet valves of the two desulfurization zones that need to be regenerated, open the water inlet valve of the first desulfurization zone, close the water outlet valve, and close the water inlet valve and outlet valve of the second desulfurization zone. Open the outlet valve and inlet valve of the regeneration tank;

[0023] S2: Primary spraying: turn on the regeneration pump and spray the first desulfurization zone with a spraying density of 18m 3 / m 2 After spraying for 4 minutes, close the water inlet valve of the first desulfurization zone, open the water inlet valve of the second desulfurization zone, and spray the second desulfurization zone with a spray density of 18m 3 / m 2 , after spraying for 4 minutes...

Embodiment 2

[0031] The desulfurization catalyst tested in this example reaches saturation after a period of simulated flue gas desulfurization under the above conditions, and is regenerated through the following steps:

[0032] S1: Regulating valves: close the flue gas inlet and outlet valves of the two desulfurization zones that need to be regenerated, open the water inlet valve of the first desulfurization zone, close the water outlet valve, and close the water inlet valve and outlet valve of the second desulfurization zone. Open the outlet valve and inlet valve of the regeneration tank;

[0033] S2: Primary spraying: turn on the regeneration pump and spray the first desulfurization zone with a spray density of 16m 3 / m 2 , after spraying for 5 minutes, close the water inlet valve of the first desulfurization zone, open the water inlet valve of the second desulfurization zone, and spray the second desulfurization zone with a spray density of 16m 3 / m 2 , after spraying for 5 minutes,...

Embodiment 3

[0041] The desulfurization catalyst tested in this example reaches saturation after a period of simulated flue gas desulfurization under the above conditions, and is regenerated through the following steps:

[0042] S1: Regulating valves: close the flue gas inlet and outlet valves of the two desulfurization zones that need to be regenerated, open the water inlet valve of the first desulfurization zone, close the water outlet valve, and close the water inlet valve and outlet valve of the second desulfurization zone. Open the outlet valve and inlet valve of the regeneration tank;

[0043] S2: Primary spraying: turn on the regeneration pump and spray the first desulfurization zone with a spraying density of 20m 3 / m 2 , after spraying for 3 minutes, close the water inlet valve of the first desulfurization zone, open the water inlet valve of the second desulfurization zone, and spray the second desulfurization zone with a spray density of 20m 3 / m 2 , after spraying for 3 minut...

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PUM

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Abstract

The invention discloses a method for regenerating a desulfurization catalyst by water washing; the method employs pulsed regeneration, so that regeneration can be performed in a plurality of desulfurization areas, a regenerating liquid spraying area is controlled through a valve, spraying time is set first for each desulfurization area during regeneration, standing and impregnating are then performed, a liquid discharge valve opened for discharging after sulfuric acid in pores of the catalyst are brought out by the regenerating liquid, and the regenerating liquid is discharged into a regenerating tank; after discharging, the liquid discharge valve is closed, and a next cycle: spraying-impregnating-discharging is entered; the cycle is repeated in a such a way until the desulfurization catalyst is regenerated thoroughly. The method for regenerating the desulfurization catalyst by water washing provided herein allows regeneration time to be effectively saved, catalyst regeneration efficiency can be effectively improved, the flow of a regenerating pump can be effectively lowered, and operating cost can be effectively saved.

Description

technical field [0001] The invention belongs to the technical field of desulfurization catalysts, and in particular relates to a water washing and regeneration method for desulfurization catalysts. Background technique [0002] The new catalytic flue gas desulfurization technology takes the catalyst as the core. The catalyst not only has the adsorption function of activated carbon, but also has a certain storage capacity for sulfuric acid. More importantly, it has a catalytic function. In the presence of oxygen, it can convert SO 2 Oxidation to SO 3 , while reacting with water vapor in the flue gas to generate sulfuric acid, turning the desulfurization process into a sulfuric acid production process. [0003] During the process of oxidizing sulfur dioxide to produce sulfuric acid, the catalyst will reach saturation after a certain period of time, and the catalyst with saturated adsorption needs to be washed with water to wash out the sulfuric acid adsorbed in the catalyst, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/48B01J38/00
CPCB01J38/00B01J38/48B01J38/485
Inventor 李月丽李刚岑望来殷实刘敏杨忠强郭益江
Owner 成都中祥天宇环保科技有限公司
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