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Catalytic oxidation process device and catalytic oxidation process method for magnesium sulfite

An oxidation device and catalytic oxidation technology, applied in the direction of magnesium sulfate, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of non-continuous production, low oxidation rate, large device volume, etc., and achieve a small number of devices and high operating efficiency High, small size effect

Pending Publication Date: 2020-04-24
广东雪迪龙环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] A catalytic oxidation process device and method for magnesium sulfite provided by the present invention is mainly used to solve the problems of low oxidation rate, large device volume, and difficult operation during the recovery and utilization of magnesium sulfite, a by-product of boiler flue gas desulfurization. High energy consumption, non-continuous production, and high operating costs

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  • Catalytic oxidation process device and catalytic oxidation process method for magnesium sulfite
  • Catalytic oxidation process device and catalytic oxidation process method for magnesium sulfite
  • Catalytic oxidation process device and catalytic oxidation process method for magnesium sulfite

Examples

Experimental program
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Effect test

Embodiment 1

[0066] Such as Figure 1-6 Shown, a kind of catalytic oxidation process unit for magnesium sulfite, this process unit comprises successively connected by pipeline:

[0067] Pulping device 1, for adding water to magnesium sulfite raw material to make magnesium sulfite slurry;

[0068] Oxidation device 2 is located at the downstream of pulping device 1, and a slurry delivery pipe 10 communicating with each other is provided between the oxidation device 2 and pulping device 1. A slurry delivery pump 101 is arranged on the slurry delivery pipe 10, and a Gas delivery pipe 21, gas delivery pipe 21 is used for passing into oxidation reaction required air in oxidation device 2, magnesium sulfite slurry is sent into oxidation device 2 through slurry delivery pipe 10 and carries out oxidation reaction, generates magnesium sulfate solution;

[0069] The evaporating device 3 is located at the downstream of the oxidizing device 2. A solution delivery pipe 20 communicating with each other ...

Embodiment 2

[0092] Such as Figure 1-2 with Figure 7 Shown, adopt catalytic oxidation process device of the present invention to carry out catalytic oxidation to solid magnesium sulfite, its processing method is specifically as follows:

[0093] S1. Slurry preparation: Add solid magnesium sulfite raw material and water into the slurry preparation tank 11 to prepare a magnesium sulfite slurry with a concentration of 35%;

[0094] S2. Catalytic oxidation: Send the magnesium sulfite slurry prepared in S1 to the oxidation device 2 through the slurry delivery pipe 10, the delivery flow rate is 300kg / h, and air is introduced, and the catalytic oxidation is carried out at a temperature of 60°C and normal pressure Reaction generates magnesium sulfate solution;

[0095] In step S2, the volume ratio of the amount of catalyst added to the reaction solution in the oxidation device 2 is 80 g:1 L, and the molar ratio of magnesium sulfite to air is 1:2.5.

[0096] S3. Evaporation and concentration: ...

Embodiment 3

[0101] Such as Figure 1-2 with Figure 7 Shown, adopt catalytic oxidation process device of the present invention to carry out catalytic oxidation to solid magnesium sulfite, its processing method is specifically as follows:

[0102] S1. Slurry preparation: Add solid magnesium sulfite raw material and water into the slurry preparation tank 11 to prepare magnesium sulfite slurry with a concentration of 40%;

[0103] S2. Catalytic oxidation: send the magnesium sulfite slurry prepared in S1 to the oxidation device 2 through the slurry delivery pipe 10, the delivery flow rate is 300kg / h, and air is introduced, and the catalytic oxidation is carried out at a temperature of 55°C and normal pressure Reaction generates magnesium sulfate solution;

[0104] In step S2, the volume ratio of the amount of catalyst added to the reaction solution in the oxidation device 2 is 100 g:1 L, and the molar ratio of magnesium sulfite to air is 1:3.

[0105] S3. Evaporation and concentration: the...

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Abstract

The invention relates to the technical field of chemical engineering, and discloses a catalytic oxidation process device for magnesium sulfite. The process device comprises a pulping device, an oxidation device, an evaporation device, a crystallization device and a collection device which are sequentially connected through pipelines, a granular catalyst is arranged in the oxidation device in bulk,the catalyst is in a free suspension state in a reaction solution, and a reflux device communicated with the bottom and the side part of the oxidation device is arranged on the outer side of the oxidation device and is used for stirring the reaction solution in the oxidation device. The process device is reasonable in design, all the devices are connected in series, the magnesium sulfite can be efficiently catalyzed and oxidized to generate magnesium sulfate, magnesium sulfate heptahydrate is finally prepared through evaporation concentration and cooling crystallization, the operation efficiency is high, and energy consumption is low; and a catalytic oxidation process method for the magnesium sulfite, provided by the invention, is simple and feasible, mild in reaction condition, low in energy consumption, short in reaction period, low in operation cost and suitable for promotion and application.

Description

technical field [0001] The invention relates to the technical field of chemical industry, more specifically, to a catalytic oxidation process device and method for magnesium sulfite. Background technique [0002] The tonnage of coal-fired boilers in my country is currently the largest in the world. With the increasingly stringent environmental protection policies and the implementation of energy-saving and emission-reduction strategies, boiler flue gas desulfurization is becoming more and more important. Among the current mainstream flue gas desulfurization processes, the magnesium oxide wet flue gas desulfurization process has been vigorously promoted and used because of its advantages such as high desulfurization efficiency, simple operation, not easy to scale, and low operation and maintenance costs. In recent years, a large number of magnesium-based flue gas desulfurization devices have been built in China. These devices use my country's abundant magnesium resources to r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/22C01F5/40
CPCB01J8/1872B01J8/228C01F5/40
Inventor 苏航张改革韦康潘宏光庞立海
Owner 广东雪迪龙环境科技有限公司
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