Cyclonic coal mine ventilation air methane (VAM) catalytic oxidization reactor

A catalytic oxidation and reactor technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve problems such as environmental pollution and energy waste, and achieve the effects of reducing costs, increasing residence time, and avoiding maintenance costs

Pending Publication Date: 2018-12-04
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a cyclone-type coal mine exhaust air catalytic oxidation device for the defects in the prior art, which solves the problems of energy waste and environmental pollution in the existing mine exhaust air directly discharged into the atmosphere, and achieves The effect of resource utilization

Method used

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  • Cyclonic coal mine ventilation air methane (VAM) catalytic oxidization reactor
  • Cyclonic coal mine ventilation air methane (VAM) catalytic oxidization reactor
  • Cyclonic coal mine ventilation air methane (VAM) catalytic oxidization reactor

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 2 As shown, the exhaust air enters the reactor through tangential entry of the volute, the inner wall of the inlet pipe is tangent to the cylinder, and the outer wall adopts an involute form with an involute angle of 180°. The reactor shell is composed of an air inlet, a volute type air inlet pipe, a cylinder, a cone, an ash storage hopper and an air outlet. The air inlet is arranged on the cylinder and connected by flanges, the reactor is supported by a bracket and a support plate, and the bracket is connected with the base, so that the reactor is more stable.

[0041] Such as image 3 As shown, the gas flow direction in the reactor is mainly divided into outer vortex and inner vortex. After the gas enters the reactor, it rotates from top to bottom along the outer wall of the reactor, that is, the outer vortex. At this time, the gas reacts with the catalyst coated on the inner wall of the reactor. At the same time, the dust particles contained in the...

Embodiment 2

[0048] Preheat the reactor to 500°C with a gas flow rate of 1.2m 3 / h, the flow rate is 0.04m / s, the methane concentration is 0.8%, the reversing period is 5min, the methane conversion rate can reach more than 85%, and the outlet temperature is only 35°C.

Embodiment 3

[0050] Preheat the reactor to 500 °C with a gas flow rate of 1.2 m 3 / h, the flow rate is 0.04m / s, the methane concentration is 0.3%, the reversing period is 5min, the methane conversion rate can reach more than 80%, and the outlet gas temperature is below 45°C.

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Abstract

A cyclonic coal mine ventilation air methane catalytic oxidization reactor belongs to the technical field of ultralow concentration methane catalytic oxidization and comprises: a gas feeding / dischargesystem, a preheating system, a reaction system, a pipeline system, and a test and control system. The VAM is preheated in a preheater and is fed into a first reactor in a volute tangential entering direction; the gas then rotates from the top to the bottom along an inner wall of the reactor and is reacted with a catalyst coating the inner wall of the reactor to generate CO2 and H2O; meanwhile, dust particles in the VAM are removed after falling into an ash hopper along the inner wall of the reactor; after the reaction, high-temperature gas rotates upwardly along axis and is finally dischargedthrough an exhaust pipe and fed into a second reactor; then the gas is subjected to the same reaction in the second reactor, a large amount of heat being released; the processes are repeatedly and alternately carried out to achieve auto-operation of the apparatus. The reactor can treat the VAM being 0.1-5% of concentration, can reach 1000 m<3> / h in maximum treatment load and 0.35 m / s in gas flowspeed, can reach 1000 DEG C in maximum working temperature and is more than 80% in removal rate.

Description

[0001] This application is a divisional application with an application date of August 10, 2015, an application number of 201510488057.5, and an invention name of a cyclone-type coal mine exhaust air catalytic oxidation reactor. technical field [0002] The invention relates to a cyclone type coal mine exhaust air catalytic oxidation reaction device, which belongs to the technical field of ultra-low concentration methane oxidation. Background technique [0003] Coal mine exhaust air is one of the main sources of gas industry emissions. At present, the CH 4 The total is 25 million tons, of which 70% (90% in China) comes from coal mine ventilation (VAM). Methane is an important greenhouse gas second only to carbon dioxide. The impact of a unit mass of methane on the atmospheric greenhouse effect is equivalent to 21 times that of the same mass of carbon dioxide. 4 Direct discharge into the atmosphere not only causes a serious waste of limited non-renewable resources, but also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72
Inventor 竹涛和娴娴陈锐夏妮李冉冉
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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