Gasification process and preparation method of heavy metal ion adsorbent for gasification process

An adsorbent, heavy metal technology, applied in gasification process, chemical instruments and methods, fixed bed gasification and other directions, can solve the problems of increasing investment cost, reducing output, reducing feed amount, etc., to reduce the consumption of water resources, Low water vapor content, reducing carbon deposition

Active Publication Date: 2017-07-18
NINGBO NOTTINGHAM NEW MATERIALS INST CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will lead to a reduction in the amount of effective raw material (coal) in the furnace, or to rebuild a new gasifier, which will undoubtedly reduce the output of the existing coal gasification plant or increase the investment cost

Method used

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  • Gasification process and preparation method of heavy metal ion adsorbent for gasification process
  • Gasification process and preparation method of heavy metal ion adsorbent for gasification process
  • Gasification process and preparation method of heavy metal ion adsorbent for gasification process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of a heavy metal adsorbent for a gasification process, the raw material of the adsorbent is a single or mixed oil shale pyrolysis residue,

[0029] The method comprises the steps of:

[0030] (1) Recovery of oil shale pyrolysis residue: The oil shale pyrolysis residue used in this example is the pyrolysis residue of Fushun oil shale obtained by dry distillation at 500° C. for 30 minutes under nitrogen gas.

[0031] (2) Characterization of the test coal and the collected oil shale pyrolysis residue: the coal tested in this example is a typical steam coal, namely Shanxi Datong coal and Dongning coal. The industrial components of coal and oil shale pyrolysis residues were determined by the industrial analysis method of GB / T212-2008 coal, and the elemental analysis results of coal and oil shale pyrolysis residues were obtained by the elemental analysis method of GB / T31391-2015 coal. The analysis results are shown in Table 1:

[0032]

[0033] Table...

Embodiment 2

[0040] In this embodiment, on the basis of the foregoing embodiments, the characteristics of coal and oil shale pyrolysis residues have a great influence on the entire process. In order to better understand the physical and chemical properties of the raw materials, in the step (2), the Coal and oil shale pyrolysis residues were detected by field scanning electron microscope / energy dispersive X-ray spectrometer (SEM / EDX), X-ray diffraction spectrum (XRD), specific surface aperture tester (BET) and ash melting characteristics.

[0041] The XRD analysis results show that the content of kaolin in Fushun oil shale pyrolysis residue is relatively high, and the main reaction mechanism for its absorption of Cd is Al 2 o 3 2SiO2 2 +CdCl 2 +H 2 O=CdO·Al 2 o 3 2SiO2 2 +2HCl↑.

Embodiment 3

[0043] In this example, on the basis of the above examples, six kinds of oil shale pyrolysis residues were recovered for testing, namely Fushun oil shale, Wulin oil shale, Laoheishan oil shale, Xingsheng oil shale and Xinghua oil shale. Table 3 shows the elemental composition of oil shale determined by energy spectrum analyzer EDS:

[0044]

[0045] table 3

[0046] Table 4 shows the results of industrial analysis and elemental analysis of oil shale:

[0047]

[0048] Table 4

[0049] The composition and content of clay minerals in oil shale pyrolysis residues can be quickly identified through the method of the present invention, and the most suitable oil shale pyrolysis residues can be selected or mixed with various oil shales in a certain proportion according to the different types of heavy metals in coal The pyrolysis residue is used as an adsorbent to achieve the optimal purification effect.

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Abstract

The invention discloses a preparation method of heavy metal ion adsorbent for a gasification process. A raw material of the adsorbent is single or mixed oil shale pyrolysis residue. The method comprises the following steps: (1) recycling various oil shale pyrolysis residues; (2) testing the characteristics of coal and the collected oil shale pyrolysis residues; (3) testing the adsorption capacity of the collected oil shale pyrolysis residues; and (4) obtaining the adsorbent recipes of different coals according to the characteristics of the coal and the adsorption capacity of the collected oil shale pyrolysis residues. The invention further discloses the gasification process. The gasification process comprises the steps of burning, pyrolyzing and gasifying the coal or biomass; the heavy metal ion adsorbent is added in a gasifying furnace in the gasification process, and the heavy metal ion adsorbent is single or mixed oil shale pyrolysis residue. The oil shale pyrolysis residues are used as the solid adsorbent of the gasification process, thereby realizing the integral purification of the organics and the inorganics in the furnace, the pollutant concentration is effectively lowered, the process water and the wastewater pollutant concentration are reduced.

Description

technical field [0001] The invention relates to the field of gasification technology, in particular to a preparation method of a heavy metal adsorbent used in the gasification technology and a gasification technology. Background technique [0002] my country's energy situation can be summarized as "coal-rich, oil-poor, and gas-deficient", which makes my country the world's largest coal producer and consumer. For a long time, coal has accounted for more than 70% of domestic primary energy consumption. The vast majority of coal resources are directly burned, which is not only inefficient but also brings serious environmental pollution problems. Therefore, how to transform coal, an unclean and cheap energy, into clean, efficient, and easier-to-use energy is an urgent problem for China's coal industry to solve. Coal gasification technology is an important means to realize the comprehensive utilization of coal and clean coal technology, which has the characteristics of cleanness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02C10J3/02C10J3/72C10J3/82
CPCB01J20/02C10J3/02C10J3/72C10J3/723C10J3/82C10J2300/0916C10J2300/093C10J2300/0953C10J2300/0983
Inventor 冯增兴吴韬孟杨唐璐瑶闫誉馨洪瑜
Owner NINGBO NOTTINGHAM NEW MATERIALS INST CO LTD
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