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Multipurpose coal liquefaction device and coal liquefaction process

A coal liquefaction and process technology, applied in the field of multi-purpose coal liquefaction devices, can solve problems such as difficult changes in raw materials and product solutions, incompatibility of processes and devices, cumbersome processing procedures, etc., to reduce material diffusion resistance, improve liquid product yield, Avoid secondary cracking and condensation effects

Active Publication Date: 2008-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are mainly the following three methods for producing liquid organic matter from coal: (1) Pyrolysis of solid fuel (low temperature, high temperature dry distillation method), its basic process is to heat coal to produce decomposition and condensation reactions , generally carried out at normal pressure and at a temperature above 400°C, the reaction generates hydrogen-rich gas, low molecular liquid tar, coal coke and residue. This method is mainly used for the upgrading of low-quality coal, and its liquid yield is low
(2) Coal gasification to produce CO and H 2 Finally, purer liquid organic matter is generated under the catalyst action of iron, cobalt and nickel, the process is complicated and the technical requirements are high
However, it needs stirring, filtering, product hydrogenation and other processes, and has the disadvantage of cumbersome processing process.
[0005] The above methods belong to different process types, the processes and devices are not compatible, and the raw materials and product plans are not easy to change

Method used

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  • Multipurpose coal liquefaction device and coal liquefaction process

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A highly dispersed iron-based catalyst treated with a colloid mill, containing 65.4m% FeS 2 , 5.7m% Fe 2 o 3 , 11.3m% FeSO 4 , 11.5m% AL 2 o 3 and 6.1m% SiO 2 , the dosage is 1.8m% (for coal), and the residual oil at >400°C is used as the solvent to carry out the hydrogen kerosene co-refining test on 100 mesh lignite, the hydrogen purity is 96v%, and the feed space velocity is 1.0h -1 , raw material hydrogen to solid-liquid volume ratio 300(Nm 3 / m 3 ). The test results are shown in Table 1. The fraction composition of the liquefied oil corresponding to the test number is shown in Table 2.

[0038] Table 1

[0039]

[0040] The reaction results shown in Table 1 are for anhydrous and ash-free coal. The liquefied oil is distilled and analyzed. When the distillation temperature is higher than 360 ° C, the liquefied oil begins to have decomposed water, and the liquefied oil with a low reaction temperature decomposes water. Slightly more, the liquefied oil reac...

Embodiment 2

[0057] An improved liquid catalyst is used, the active ingredients are dimer acid urea complexed lanthanum 3.5m%, ethylenediaminetetraacetic acid complexed iron 6.8m%, glutaric acid urea complexed cobalt 5.6m%, isooctanoic acid urea complexed 1.8m% molybdenum, 2m% sorbitan monooleate as auxiliary agent, and residue oil at >400°C as solvent. 100% screened 100-mesh lignite was tested for low-pressure solvent hot-melt catalysis, the hydrogen purity of stirring was 96v%, and the feeding space velocity was 1.0h -1 , stirring hydrogen to solid-liquid volume ratio 100 (Nm 3 / m 3 ). In addition, the patent 200410015698.0 was implemented in an autoclave for comparison. The test results are shown in Table 3.

[0058] The reaction results shown in Table 3 are for anhydrous and ash-free coal. The pressure of the test of the present invention is automatically controlled by the hydrogen pressure, and the pressure of the control test is firstly filled with nitrogen to pressurize the aut...

Embodiment 3

[0069] A liquid catalyst containing 15.2m% of potassium aluminate, 8.5m% of potassium vanadate, 15.5m% of ferrous sulfate, 6.8m% of ammonium molybdate, 5.4m% of nickel nitrate and 35m% of acetic acid aqueous solution is used as the liquid catalyst. The dosage is 2.5m% (to coal), with industrial xylene: benzene: water = 60: 30: 10 (weight ratio) as solvent, adding 0.25m% (to solvent) sodium dodecylsulfonate as auxiliary agent Carry out the extraction test of 100% screening 100 order lignite on the device of the present invention, temperature 420 ℃, pressure 18MPa, the mixed gas that hydrogen and CO volume ratio are 1: 1 is stirring gas and hydrogenation gas, coal agent weight ratio =1:5, gas to solid-liquid volume ratio 150(Nm 3 / m 3 ), airspeed 1.0h -1 . In addition, a comparative test was carried out on an autoclave, with the same solvent and coal agent ratio, no catalyst and additives added, nitrogen pressure at 18MPa, heating at 50°C / h to 420°C for 1h at constant tempera...

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Abstract

The invention relates to a multi-purpose coal liquefaction device and a coal liquefaction process. The device mainly comprises a three-phase countercurrent reactor which uses coal to prepare the liquid product, a two-phase countercurrent reactor which uses residual coal to prepare the hydrogen for the hydro-grading of the liquid product and a correlative separation system; the technological processes of high-pressure hydrogenation coal liquefaction, thermally dissolving and catalytic of the coal low-pressure solvent or coal solvent extraction are realized through the adjustment of the operating conditions of the three-phase countercurrent reactor. Compared with the prior art, the multi-purpose coal liquefaction device and the coal liquefaction process has the advantages of strong flexibility, wide adaptability for the coal sources and realizing various coal liquefaction processes according to the coal quality and the product requirement.

Description

technical field [0001] The invention relates to the technical field of coal chemical processing, in particular to a multipurpose coal liquefaction device and process. Background technique [0002] There are mainly the following three methods for producing liquid organic matter from coal: (1) Pyrolysis of solid fuel (low temperature, high temperature dry distillation method), its basic process is to heat coal to produce decomposition and condensation reactions , generally carried out at normal pressure and temperature above 400°C, the reaction generates hydrogen-rich gas, low-molecular liquid tar, coal coke and residue. This method is mainly used for the upgrading of low-quality coal, and its liquid yield is low. (2) Coal gasification to produce CO and H 2 Finally, a relatively pure liquid organic matter is generated under the catalyst action of iron, cobalt, and nickel. The process is complicated and the technical requirements are high. (3) Coal direct liquefaction method ...

Claims

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Application Information

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IPC IPC(8): C10G1/06
Inventor 彭派
Owner CHINA PETROLEUM & CHEM CORP
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