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A kind of desulfurization and demercuration agent used in fixed bed reactor and preparation method thereof

A fixed bed reactor and mercury removal technology, applied in chemical instruments and methods, separation methods, gas treatment and other directions, can solve the problems of poor application prospects of desulfurization and mercury removal agents, poor sulfur and mercury removal efficiency, and high application costs, Achieving low cost, increased activity, and easy access

Active Publication Date: 2020-01-31
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the removal efficiency of sulfur and mercury in the existing technology is still poor, so that a large number of researchers are committed to continuous research on desulfurization and mercury removal technology, and strive to obtain a method that can improve the desulfurization and mercury removal rate of combustion tail gas, making the existing technology A large number of technical literature reports on desulfurization and mercury removal agents have appeared in
[0004] For example, the patent document 200810118580.9 provides a kind of manganese dioxide and magnetic iron oxide as active components, and the active components and carrier are formulated into a desulfurization and mercury removal agent, but due to the magnetic iron oxide iron Fe used therein 21.333 o 3 The composition is prepared by the enterprise itself, and the cost of preparing this composition is high, which makes the wide application prospect of this kind of desulfurization and mercury removal agent poor, and the application cost is high, which makes the sulfur in the tail gas and hydrocarbon components in the industrial gas combustion process , the cost of mercury removal is higher

Method used

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preparation example Construction

[0048] In some embodiments, the method for preparing a desulfurization and mercury removal agent used in a fixed bed reactor includes the following steps:

[0049] (1) Take pyrolusite, crush it, treat with microwave radiation, add γ-Fe in the microwave radiation process 2 O 3 Mix the powder evenly to obtain the mixture; or take the pyrolusite, crush it, add water to prepare a slurry, and use microwave radiation treatment, add γ-Fe in the microwave radiation process 2 O 3 The powder is stirred evenly, spray dried, and passed through a 30-80 mesh sieve to obtain a mixture;

[0050] (2) Mix the carrier and manganese carbonate in a mass ratio of 1:0.2-0.7, calcinate at a temperature of 120-170°C for 10-20 minutes, and grind into a powder of 30-90 mesh;

[0051] (3) Mix the mixture of step (1) with the powder of step (2), mix so that the carrier occupies 20-60% of the total mass of the desulfurization and mercury removal agent, and use ultrasonic treatment for 10-20 minutes.

[0052] In som...

Embodiment 1

[0054] A desulfurization and mercury removal agent used in a fixed bed reactor, which is composed of a carrier and an active component, wherein the active component is a mixture of pyrolusite powder and γ-Fe2O3 powder in a mass ratio of 100:0.5; The carrier accounts for 20% of the total mass of the desulfurization and mercury removal agent. The carrier is activated carbon.

Embodiment 2

[0056] A desulfurization and mercury removal agent used in a fixed bed reactor, which is composed of a carrier and an active component, wherein the active component is a mixture of pyrolusite powder and γ-Fe2O3 powder in a mass ratio of 100:19; The carrier accounts for 60% of the total mass of the desulfurization and mercury removal agent. The carrier is a mixture of silica and activated carbon in any mass ratio.

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PUM

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Abstract

The invention relates to the technical field of desulfurization and demercuration, and in particular to a desulfurization and demercuration agent used in fixed bed reactors and a preparation method thereof. With pyrolusite powder and Gamma-Fe2O3 powder as active component materials of the desulfurization and demercuration agent and a carrier for carrying the active components, the desulfurization and demercuration agent is applied in a fixed bed reactor, and can ensure that the rate of removing sulfur in exhaust gas can reach more than 90 percent and that the rate of removing mercury can reach more than 83 percent.

Description

Technical field [0001] The invention relates to the technical field of desulfurization and mercury removal, in particular to a desulfurization and mercury removal agent used in a fixed bed reactor and a preparation method thereof. Background technique [0002] Industrial gases such as coal, coke oven gas, water gas, and natural gas all contain mercury and sulfur components. During the combustion process, sulfur and mercury form sulfur dioxide gas, and the form of mercury molecules or ionic mercury is emitted in the combustion exhaust gas. The discharge of gas into the air causes serious pollution to the environment and poses serious health threats to humans. The reason is that after sulfur enters the air, as rain falls, it forms acid rain with rainwater, which threatens land preparation and biological drinking water. Mercury enters the food chain and enters organisms as the rain falls. In the body, it is easy to form highly toxic methylmercury, and methylmercury will combine wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81B01D53/64B01D53/50
CPCB01D53/508B01D53/64B01D53/81B01D2257/602B01D2258/0283
Inventor 陈肖虎黎志英刘利金会心陈庆唐道文赵平原王丽远鲁圣军黄碧芳
Owner GUIZHOU UNIV