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Low-and-medium-temperature pyrolysis system for coal and method for producing upgraded coal, high-calorific-value pyrolysis gas and tar or liquefied synthetic oil by using same

A technology for low-temperature pyrolysis and upgrading of coal, applied in chemical instruments and methods, gasification process, bulk chemical production, etc., can solve problems such as fusion, operation accidents, high operation and cost

Inactive Publication Date: 2011-05-04
NAT INST OF CLEAN AND LOW CARBON ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] But above-mentioned system and method also have very big shortcoming, first: need three high-temperature reactors, its operation and cost are very high; The reactor is even as high as 1200°C-1550°C. At such a high temperature, the oxygen transfer material particles or coke will gradually fuse from small particles to large particles under the action of surface tension. When transported from one reactor to another reactor It will block the pipeline and cause operation accidents; third: in this system, the gasification of coal is carried out in two steps, in the first reactor, the coal is initially gasified, in the second reactor, part of the formed coke is fully vaporized
This invisibly increases the complexity of the system and the insecurity of system operation

Method used

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  • Low-and-medium-temperature pyrolysis system for coal and method for producing upgraded coal, high-calorific-value pyrolysis gas and tar or liquefied synthetic oil by using same
  • Low-and-medium-temperature pyrolysis system for coal and method for producing upgraded coal, high-calorific-value pyrolysis gas and tar or liquefied synthetic oil by using same
  • Low-and-medium-temperature pyrolysis system for coal and method for producing upgraded coal, high-calorific-value pyrolysis gas and tar or liquefied synthetic oil by using same

Examples

Experimental program
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Effect test

Embodiment 1

[0145] take as figure 1 and the system shown in Fig. 2 to implement the method for producing upgraded coal, high calorific value pyrolysis gas and coal tar or liquefied synthetic oil of the present invention

[0146] First, bituminous coal with the following chemical composition was crushed into particles with the following particle size distribution using conventional crushing equipment.

[0147] 5mm>95% by weight of bituminous coal particle size>1mm;

[0148] 10mm>100% by weight of bituminous coal particle size>500 microns.

[0149] The chemical composition of coal is as follows:

[0150] Table 1

[0151] C

H

O

N

S

Ash

Volatile matter

83-87％

5.5-5.7％

5-10％

1.5-5.5％

1％

18％

21％

[0152] The above values ​​are by weight

[0153] Usually, the moisture content of bituminous coal is not limited, but at this time, the moisture content of bituminous coal was 14%. The calorific value is 1990 joules...

Embodiment 2

[0181] After mixing the crushed bituminous coal particles in Example 1 with pyrrhotite (Fe(1-x)S) (wherein (1-x) is generally about 0.8) with the same or similar particle size in a ratio of 99:1 , The resulting mixture is injected into the medium and low temperature pyrolysis furnace (100) in the same manner as in Example 1. Under the catalysis of pyrrhotite and FeS produced in the coal pyrolysis process, the coal or the tar produced by coal pyrolysis will be cracked and hydrogenated with the hydrogen in the pyrolysis gas to form low molecular weight liquefied synthetic oil.

[0182] Finally, the chemical composition of coal pyrolysis gas is as follows:

[0183] Table 6

[0184] CO

H 2

CO 2

CH 4

h 2 o

SO 2

trace

38.6-47.4％

16-19.4％

14-15％

4-6％

17.8-19.8％

0.3-0.8％

[0185] The above values ​​are in moles

[0186] The calorific value of the above-mentioned pyrolysis gas after dehydration is...

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Abstract

The invention relates to a low-and-medium-temperature pyrolysis system for coal and a method for producing upgraded coal, high-calorific-value pyrolysis gas and tar or liquefied synthetic oil by using same, which can effectively capture carbon dioxide. The system comprises a low-and-medium-temperature pyrolysis furnace, at least one oxygen transferring material regenerator and a condenser, wherein the oxygen transferring material regenerator is communicated with the low-and-medium-temperature pyrolysis furnace; in the low-and-medium-temperature pyrolysis furnace, raw coal is subjected to low-and-medium-temperature pyrolysis and generates the upgraded coal, the high-calorific-value pyrolysis gas and the tar or liquefied synthetic oil gas; and the tar or liquefied synthetic oil gas is condensed into tar or liquefied synthetic oil; in the oxygen transferring material regenerator, a waste oxygen transferring material is regenerated by oxidation and enters the low-and-medium-temperature pyrolysis furnace again, and thus, the regenerative cycle of the oxygen transferring material is realized.

Description

technical field [0001] The invention relates to medium and low temperature pyrolysis of coal, more specifically, to a medium and low temperature coal pyrolysis system and a method for producing upgraded coal, high calorific value pyrolysis gas, coal tar or liquefied synthetic oil by using the system. Background technique [0002] The chemical composition of coal is very complex, but it can be summarized into two categories: organic matter and inorganic matter, with organic matter as the main body. The organic matter in coal is mainly composed of five elements including carbon, hydrogen, oxygen, nitrogen and organic sulfur, among which carbon, hydrogen and oxygen account for more than 95% of the organic matter. In addition, there are very small amounts of phosphorus and other elements. The inorganic substances in coal are mainly water and minerals, and their existence reduces the quality and utilization value of coal, most of which are harmful components in coal. Coal and w...

Claims

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Application Information

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IPC IPC(8): C10J3/60C10J3/84C10J3/46C10J3/56C10J3/62C10G1/08C10L9/08
CPCC10B53/04B01J27/043C10B49/22C10G1/02C10G2300/202C10J3/48C10J3/482C10J3/56C10J3/725C10J2300/093C10J2300/0976C10J2300/0993C10J2300/1807C10J2300/1853C10J2300/1869C10J2300/1884C10K1/005C10K1/32C10L9/08Y02P20/52
Inventor 刘科
Owner NAT INST OF CLEAN AND LOW CARBON ENERGY
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