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Methane separation and purification device and method thereof for purifying methane by absorbing CO2 through alkaline method

A purification device and a technology for purifying gas, which are applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of unreasonable equipment selection, large engineering design margins, and high operating costs, and achieve small equipment size, Inexpensive, low-cost effects

Inactive Publication Date: 2013-05-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with advanced countries, there is a big gap in my country's industrial technology, such as large engineering design margin, unreasonable equipment selection, large investment, high operating costs, and low gas production efficiency.

Method used

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  • Methane separation and purification device and method thereof for purifying methane by absorbing CO2 through alkaline method
  • Methane separation and purification device and method thereof for purifying methane by absorbing CO2 through alkaline method

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Open the pipeline valve of the biogas cylinder to enter the biogas storage tank, adjust the pressure of the storage tank to 0.05MPa, and when the biogas pressure in the rotating packed bed reactor is balanced with the pressure of the storage tank, turn on the infusion pump to release Ca 2+ Ca(OH) with a concentration of 0.08mol / L 2 The absorption solution was continuously pumped into the rotary packed bed reactor at a speed of 20ml / min. At the same time, the motor speed of the reactor was adjusted to 500r / min. After 5 minutes of reaction, the gas was collected from the sampling port G1 every 5 minutes. Gas samples will be collected and analyzed on a gas chromatograph. CO before biogas absorption and after 5 minutes of absorption 2 、CH 4 The results of the content analysis are listed in Table 1.

Embodiment 2

[0046] Open the pipeline valve of the biogas cylinder to feed the gas into the biogas storage tank, adjust the pressure of the storage tank to 0.1 MPa, and when the biogas pressure in the rotating packed bed reactor is balanced with the pressure of the storage tank, turn on the infusion pump to release Ca 2+ Ca(OH) with a concentration of 0.05mol / L 2 The absorption liquid was continuously pumped into the rotary packed bed reactor at a speed of 50ml / min. At the same time, the motor speed of the reactor was adjusted to 1500r / min. After 5 minutes of reaction, the gas was collected from the sampling port G1 every 5 minutes. Gas samples will be collected and analyzed on a gas chromatograph. CO before biogas absorption and after 5 minutes of absorption 2 、CH 4 The results of the content analysis are listed in Table 1.

Embodiment 3

[0048] Open the pipeline valve of the biogas cylinder to feed the gas into the biogas storage tank, and adjust the pressure of the storage tank to 0.15MPa. 2+ Ca(OH) with a concentration of 0.06mol / L 2 The absorption solution was continuously pumped into the rotary packed bed reactor at a speed of 80ml / min. At the same time, the motor speed of the reactor was adjusted to 2500r / min. After 5 minutes of reaction, the gas was collected from the sampling port G1 every 5 minutes. Gas samples will be collected and analyzed on a gas chromatograph. CO before biogas absorption and after 5 minutes of absorption 2 、CH 4 The results of the content analysis are listed in Table 1.

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Abstract

The invention discloses a methane separation and purification device and a method thereof for purifying methane by absorbing CO2 through an alkaline method, and belongs to the technical field of methane separation and purification. CO2 contained in the methane is absorbed and separated through a rotating packed bed reactor by taking Ca(OH)2 as an absorbing agent. The methane separation and purification device and the method thereof, which are disclosed by the invention, have the advantages of wide source, low cost and environmental friendliness of the selected absorbing agent, simple reaction device, moderate reaction condition, convenience for operation, high CO2 absorption rate and high purity of the separated methane; and according to the invention, a small amount of nanometer CaCO3 generated in the absorption process can be used for plastics, rubbers, coatings, ink and cathode electrophoretic paint, and a large amount of generated Ca(HCO3)2 solutions can be returned to a CaO water solution to generate Ca(OH)2 for recycling. The process disclosed by the invention has the advantages of easiness for separation and regeneration, low energy consumption and cost and high absorption efficiency. The methane separation and purification device and the method thereof, which are disclosed by the invention, play an important promotion role on the development of the field of energy and chemical industry and a methane purification and separation technology especially.

Description

technical field [0001] The invention belongs to the technical field of biogas separation and purification, in particular to a biogas separation and purification device and its alkaline method for absorbing CO 2 Methods of purifying biogas. Background technique [0002] Energy and the environment are major issues in today's social development and human survival. It has become an urgent and arduous task for the world to actively develop renewable energy, protect the ecological environment and achieve sustainable development. Compared with other renewable energy sources, biomass can not only produce solid, liquid, and gas three-state energy products, but also can be used as a material carrier to produce other chemical products, which is expected to replace fossil energy and various chemical products derived from it; biogas as biomass A kind of energy, which has a history of nearly a hundred years of development and application in our country. It can be used directly as fuel, o...

Claims

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Application Information

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IPC IPC(8): C10L3/10B01D53/78B01D53/62C01F11/18
CPCY02P20/151
Inventor 蒲薇华李十中肖杨张成明
Owner TSINGHUA UNIV
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