Method of removing siloxane from combustible gas, application and system thereof

A siloxane and gas technology, which is applied in the field of combustible gas impurity removal, can solve problems such as the influence of gas equipment, and achieve the effects of quick effect, simple system and low investment.

Inactive Publication Date: 2008-07-23
吴未立
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] One of the purposes of the present invention is to invent a method for removing siloxane and other impurities in combustible gas by using a refrigeration compressor system to solve the problem that siloxane impurities in combustible gases will have a serious impact on gas-consuming equipment

Method used

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  • Method of removing siloxane from combustible gas, application and system thereof

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Experimental program
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Effect test

Embodiment 1

[0026] A method for removing siloxane in combustible gas, its specific steps are as follows:

[0027] First, the combustible gas containing siloxane (such as landfill gas, biogas generated in sewage or biogas generated from sludge) is sent into the compressor for compression, and the pressure is increased to 10kPa ~ 1.6MPa to remove liquid water and granular impurities; this is because most of the gaseous impurities in the combustible gas will become liquid and granular under high pressure, so pressurization is the first step to remove impurities;

[0028] Then, send the compressed combustible gas into the pre-cooling heat exchanger to cool the combustible gas to 0-5°C to further remove moisture and liquid impurities in the combustible gas; after the gas is cooled, a large amount of moisture and After the liquid impurities are condensed, they can be discharged from the sewage outlet on the pre-cooling heat exchanger;

[0029] Thirdly, the above-mentioned cooled combustible ga...

Embodiment 2

[0031] The above method for removing siloxane in combustible gas is used to remove heavy carbon hydrocarbons in petroleum associated gas. Among them, the removal rate of heavy carbon hydrocarbons is 85%, while that of siloxane is 90%.

Embodiment 3

[0033] As shown in Figure 1.

[0034] A system for removing siloxane impurities in combustible gas, which consists of a pre-cooling heat exchanger 1, a refrigeration compressor 2 for pre-cooling, heat exchangers 3, 4, and a refrigeration compressor 5, and the pre-cooling heat exchanger 1 and Pre-cooling is connected with refrigeration compressor 2, and pre-cooling heat exchanger 1 is connected with gas inlet, outlet and liquid impurity discharge port (not shown in the figure), heat exchanger 3, 4 and refrigeration compressor 5 are connected in parallel, pre-cooling exchanging The air inlet of the heater 1 is connected with the combustible gas source (which can be landfill gas, sewage biogas, sludge biogas or petroleum-associated gas, etc.), and its gas outlet is respectively connected to the installed heat exchangers 3 and 4 through the valve 7. The air inlets on the gas tanks are connected, and the gas tanks installed with heat exchangers 3 and 4 are respectively connected wi...

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Abstract

The invention relates to a method for removing siloxane from garbage landfill gas, sewage and mud marsh gas. The method compresses the marsh gas from garbage landfill fields and sewage and mud pools and remove water and granule impurities, and the marsh gas is compressed into a pre-cooling heat exchanger, cold source of which is provided by a cooling compressor to cool the gas to 0 DEG C and then the majority of the water and liquid impurities are removed. Then, the gas is compressed into a freezing device formed by two groups of heat exchanger to be frozen to minus 25 DEG C to minus 30 DEG C, and then siloxane and heavy hydrocarbons, etc. impurities with a high dew point are absorbed to the surface of the heat exchanger, and at the same time the system makes use of the heat in an evaporator of the cooling device to melt the siloxane and heavy hydrocarbons, etc. impurities with a high dew point which are absorbed to the surface of the heat exchanger; the high dew point siloxane and heavy hydrocarbons, etc. impurities are drained to the outside of the heat exchanger along with liquid impurities in the effect of pressure and two groups of heat exchangers work alternatively, so the invention realizes the aim of removing siloxane from garbage landfill gas, sewage and mud marsh gas and has the advantages of simple processes, health and environment-protection.

Description

technical field [0001] The invention relates to a method and device for removing impurities in combustible gas, especially a method for removing siloxane in combustible gas and a device thereof, in particular to a method for removing siloxane in combustible gas and its application and system. Background technique [0002] As we all know, in the power generation of landfill gas, sewage and sludge biogas, the siloxane in landfill gas and the siloxane in sewage and sludge biogas are organic polymers, which are viscous when the temperature is low. , and decomposes into white powder with extremely high hardness at high temperature. Siloxane is a very harmful substance in power generation projects using landfill gas, sewage, and sludge biogas. At low temperatures, viscous siloxane can clog filters and drain lines, hindering the flow of gas and the discharge of liquid impurities. Siloxane is easily decomposed at high temperature, and the decomposed product is white powder with ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D5/00F25J3/08
Inventor 吴未立
Owner 吴未立
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