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Method for preparing biological hydrogen by using traditional Chinese medicine residue

A traditional Chinese medicine slag and biological technology, which is applied in the field of gas fuel, can solve the problems of the amount of material gas, the instability of the system, and the uneven distribution of the bed, and achieve the effect of reducing the content.

Inactive Publication Date: 2015-08-05
BEIJING GUOHUAN TSINGHUA ENVIRONMENT ENG DESIGN & RES INST CO LTD BEIJING CHINA +1
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Problems solved by technology

[0010] Although some studies have been carried out on the use of twin-bed systems to treat cellulose-rich biomass, most of the existing twin-bed technologies suffer from uneven bed distribution, unstable and effective circulation of the entire system, and poor gas volume and gas quality of the produced materials. Defects such as stability

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  • Method for preparing biological hydrogen by using traditional Chinese medicine residue
  • Method for preparing biological hydrogen by using traditional Chinese medicine residue
  • Method for preparing biological hydrogen by using traditional Chinese medicine residue

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Embodiment 1

[0042] The method that the present invention proposes adopts the pyrolysis gasification reaction system prepared by Institute of Process Engineering, Chinese Academy of Sciences, see figure 1 . The system includes a pyrolyzer 1, a gasification bed 2, a primary cyclone separator 3, and a secondary cyclone separator 4. The bottom of the pyrolyzer 1 is provided with an air inlet 7 for the pyrolyzer, and the middle part is an inlet 6 for Chinese medicinal residues. The material outlet of the pyrolyzer is connected with the gasification bed 2 . The top of the gasification bed 2 is connected to the primary cyclone separator 3 and the secondary cyclone separator 4 through pipelines, and the two cyclone separators are connected in series. The air inlet 5 of the return valve at the bottom of the primary cyclone separator 3 is used to control the return of the heat carrier to the pyrolyzer. A gasification agent inlet 8 is provided at the bottom of the gasification bed 2 . The gas ou...

Embodiment 2

[0063] System is the same as embodiment 1. The composition of traditional Chinese medicine dregs is as follows:

[0064] Table 6 Industrial analysis and elemental analysis of traditional Chinese medicine residues

[0065]

[0066] In step 2), the water vapor ratio is controlled at 0.7, and the equivalent oxygen ratio is controlled at 0.2.

[0067] In step 4), the temperature of the reforming reaction is 880-900 ° C, the pressure is 2.8 MPa, and the molar ratio of water vapor to C is controlled at 3.3; the reformed gas is first cooled to 370 ° C by a cooler, and enters the high-temperature conversion reaction After the conversion reaction is carried out in the high-temperature conversion reactor, it is cooled to 200°C and then enters the low-temperature conversion reactor for conversion reaction. Hydrogen is purified by pressure swing adsorption device, and the recovery rate of hydrogen is 96%.

[0068] All the other operating parameters are the same as in Example 1.

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Abstract

The invention provides a method for preparing biological hydrogen by using traditional Chinese medicine residue. The method comprises that: 1) traditional Chinese medicine residue enters a pyrolysis device, and air enters from the bottom portion of the pyrolysis device so as to make the traditional Chinese medicine residue be subjected to pyrolysis under a fluidized state; 2) the pyrolysis product enters a gasification bed, and gasification is performed by adopting water vapor and oxygen as gasification agents; 3) the gasification product enters a two-stage cyclone separation device to separate; 4) the gas being subjected to the cyclone separation is the gasified gas, and the gasified gas is sequentially purified through a venturi washing device, a washing tower, and a desulfurization tower; 5) the purified gasified gas sequentially passes through a reforming reactor, a high-temperature conversion reactor and a low-temperature conversion reactor so as to complete reforming and conversion; and 6) hydrogen purification is performed. The present invention provides the method for carrying out pyrolysis gasification on the traditional Chinese medicine residue so as to prepare the biological hydrogen. According to the present invention, the pyrolysis gasification of the traditional Chinese medicine residue is performed by using the double-bed system, the appropriate process parameters are controlled to avoid the generation of the tar in the gasification product, and the gasified gas is directly reformed and converted to prepare the biological hydrogen without cracking.

Description

technical field [0001] The invention belongs to the field of gas fuel, in particular to a method for producing hydrogen by utilizing carbon-containing biomass through pyrolysis and gasification. Background technique [0002] With the development of my country's traditional Chinese medicine and the enhancement of people's health awareness, the application of Chinese herbal medicines and Chinese patent medicines has become more and more extensive, but there has also arisen a problem that cannot be ignored-the disposal of Chinese medicine residues. Traditional Chinese medicine dregs mainly come from the production process of various traditional Chinese medicines. According to statistics, the annual discharge of Chinese medicine dregs from major Chinese medicine pharmaceutical factories in my country is as high as 30 million tons. Traditional Chinese medicine dregs generally have high water content and certain nutrients, and are easily corrupted. Traditional treatment methods su...

Claims

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Application Information

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IPC IPC(8): C01B3/00C01B3/02C01B3/12C01B3/34C01B3/50C10J3/66C10J3/84
CPCY02E60/32Y02P20/52
Inventor 李艳汪诚文姚常斌
Owner BEIJING GUOHUAN TSINGHUA ENVIRONMENT ENG DESIGN & RES INST CO LTD BEIJING CHINA
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