Technology of preparing synthetic gas using non agglomerating or weak agglomerating coal fluidized destructive distillation

A synthesis gas and cohesive technology, applied in the field of coal chemical industry, can solve the problems of high investment and high operating cost, and achieve the effect of low investment, high raw material utilization rate and high yield

Active Publication Date: 2007-02-14
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, the overall liquid yield of coal liquefaction is 4.3 tons of coal to...

Method used

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  • Technology of preparing synthetic gas using non agglomerating or weak agglomerating coal fluidized destructive distillation

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Embodiment 1

[0029] The non-caking or weakly caking coal of the present invention includes: lignite, long-flame coal, and gas coal. The process is used to produce coal tar synthesis gas.

[0030] Refer to attached figure 1 , the present invention a kind of non-caking property or weakly cohesive coal fluidized dry distillation process for producing synthesis gas, comprising the following steps:

[0031] Step 1, pulverizing the non-caking or weakly caking coal from Yunnan Xianfeng Coal Mine to make pulverized coal; the particle size is in the range of 0-1000 microns, showing a normal distribution.

[0032] Step 2, send the obtained pulverized coal into the carbonization reactor for high-temperature heating to generate carbonization gas, tar vapor and carbonization semi-coke; the reaction pressure of the carbonization reactor is 0.1-0.2MPa, the operating temperature is 450-800°C, and the gas-solid ratio is 1.0- 20:1 (v / v), the gas is a mixture of methane, hydrogen, carbon monoxide, carbon di...

Embodiment 2

[0037] The present invention provides a process for preparing synthesis gas by fluidized dry distillation of non-caking or weakly caking coal, comprising the following steps:

[0038]In step 1, the non-caking or weakly caking coal of Harbin Yilan Coal Mine is pulverized to make pulverized coal; the particle size is 20-600 microns, and it is normally distributed. In order to fully heat and facilitate the fluidization reaction.

[0039] Step 2, send the obtained pulverized coal into the carbonization reactor to generate carbonization gas, tar vapor and carbonization semi-coke; the reaction pressure of the carbonization reactor is 0.18MPa, the operating temperature is 600°C, and the gas-solid ratio is 4.5:1 (v / v). A riser reactor is selected as the dry distillation reactor, and a settler is installed on the top of the settler, and a three-stage rotary separation is installed in the settler, so as to minimize the coal ash content in the synthesis gas.

[0040] Step 3, after cooli...

Embodiment 3

[0044] The present invention provides a process for preparing synthesis gas by fluidized dry distillation of non-caking or weakly caking coal, comprising the following steps:

[0045] In step 1, the non-cohesive or weakly cohesive coal of Liangshuijing Coal Mine in northern Shaanxi is pulverized to produce pulverized coal; the particle size is 20-600 microns, and it is normally distributed.

[0046] Step 2, send the obtained pulverized coal into the carbonization reactor to generate carbonization gas, tar vapor and carbonization semi-coke; the reaction pressure of the carbonization reactor is 0.18MPa, the operating temperature is 600°C, and the gas-solid ratio is 4.5:1 (v / v). A riser reactor is selected as the dry distillation reactor, and a settler is installed on the top of the settler, and a three-stage rotary separation is arranged in the settler, so as to minimize the coal ash content in the generated coal gas.

[0047] Step 3, after cooling the dry distillation gas and t...

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Abstract

The invention discloses a process for making synthetic gas by non-adhesive or low-adhesiveness coal fluidized carbonization, comprising the steps of: crushing non-adhesive or low-adhesiveness coal into fine coal; feeding the fine coal into a carbonization reactor and producing coal gas, tar steam and semicoke; cooling the coal gas and tar steam, and extracting the coal gas and coal tar; feeding the semicoke into a coal gas generator to react with oxygen gas and water steam to produce generated coal gas and coal ash; feeding the generated coal gas into a CO conversion reactor to regulate composition of the synthetic gas and act as synthetic methanol gas. And the utilization ratio of raw materials can be 100%. And the oil yield of fine coal fluidized carbonization is high. And the produced semicoke can completely turn into generated coal gas, and finally only coal ash is left. And the yield of liquid products by carbonization and liquid products synthetized by synthetic gas is higher than that of liquid products by coal liquefaction.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a process for producing synthesis gas by fluidized dry distillation of non-caking or weakly cohesive coal and dry distillation of semi-coke. Background technique [0002] Lignite is a non-caking or weakly caking coal, and it is the coal with the lowest degree of coalification. It is characterized by high moisture, low specific gravity, high volatile content, non-sticking, strong chemical reactivity, poor thermal stability, low calorific value, and contains different amounts of humic acid. It is mostly used as fuel, raw material for gasification or low-temperature dry distillation, and can also be used to extract montan wax and humic acid to make sulfonated coal or activated carbon. Long-flame coal has a high volatile content, no or only small cohesiveness, and the thickness of the gelatinous layer does not exceed 5mm. It is easy to burn and has a long flame when burned, so ...

Claims

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Application Information

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IPC IPC(8): C10J3/54C10J3/58
CPCY02E20/18
Inventor 王守峰吕子胜李秀辉
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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