Method for comprehensively utilizing fine coal gasification slag

Abstract

The invention discloses a method for preparing an adsorption material from fine coal gasification slag. The method comprises the following steps: 1, taking a proper amount of the fine coal gasification slag, and adding water to prepare a fine coal gasification slag slurry with the solid content being 10-30 wt%; 2, fully stirring the slurry prepared in step 1, performing gravity cyclone separation,collecting the obtained heavy separation product to obtain a silicon-rich composite slurry, and collecting the obtained light separation product to obtain a carbon-rich composite slurry; and 3, carrying out solid-liquid separation and drying on the carbon-rich composite slurry to obtain the carbon-rich adsorption material, and further preparing other products from the remaining silicon-rich composite slurry. The method realizes the high-added value recycling of the fine coal gasification slag.

Description

technical field

[0001] The invention belongs to the field of resource utilization of solid waste, in particular to a comprehensive utilization method of coal gasification fine slag. Background technique

[0002] Coal gasification technology is one of the core contents of clean coal technology. Incomplete oxidation of coal to obtain combustible coal gasification gas (such as crude gas) for downstream use has rapidly become an important direction of coal resources and energy utilization in recent years. In the past 20 years, my country has built a number of coal chemical enterprises in Yulin, Shaanxi, Ordos, Inner Mongolia, Changzhi, Shanxi and other places, which have been put into production one after another, and the output has increased year by year. The clean and comprehensive utilization of coal resources has formed a certain scale in my country.

[0003] In the coal gasification technology system, while most of the carbonaceous part of the coal is converted into gas, th...

Examples

Embodiment 1-1

[0066] Weigh 500g of coal gasification fine slag (moisture content 55%), add water to dilute to 10% solid content, and use a high-speed dispersion mixer (Guangdong Foshan Yifu Machinery Co., Ltd.) to stir at room temperature. The stirring conditions are: the speed is 1600r / min, Stir for 20min. The slurry is introduced into a cyclone separator for separation, and the obtained lower slurry is a silicon-rich composite slurry; the obtained upper slurry is a carbon-rich composite slurry;

[0067] The carbon-rich composite slurry was subjected to solid-liquid separation to obtain a carbon-rich mud cake, which was then dried in an oven at 110° C. for 6 hours to obtain a carbon-rich adsorption material. The carbon content of the carbon-rich adsorption material was 83 wt%. After testing, the iodine value was 541.7mg / g, and the methylene blue adsorption capacity was 116.5mg / g.

Embodiment 1-2

[0069] Weigh and weigh 500g of coal gasification mud (55% of which contains water), add water to dilute to a solid content of 20%, and use a high-speed dispersion mixer (Guangdong Foshan Yifu Machinery Co., Ltd.) to stir at room temperature. The stirring conditions are: the speed is 1600r / min, Stir for 40min. The slurry is introduced into a cyclone separator for separation, and the obtained lower slurry is a silicon-rich composite slurry; the obtained upper slurry is a carbon-rich composite slurry;

[0070] The carbon-rich composite slurry was subjected to solid-liquid separation. After the solid-liquid separation, a carbon-rich mud cake was obtained, which was then dried in an oven at 110° C. for 6 hours to obtain a carbon-rich adsorption material. The carbon content in the carbon-rich adsorption material was 81 wt%. After testing, the iodine value was 526.81 mg / g, and the methylene blue adsorption capacity was 123.2 mg / g.

Embodiment 1-3

[0072] Weigh and weigh 500g of coal gasification mud (55% of which contains water), add water to dilute to a solid content of 20%, and use a high-speed dispersion mixer (Guangdong Foshan Yifu Machinery Co., Ltd.) to stir at room temperature. The stirring conditions are: the speed is 1600r / min, Stir for 60min. The slurry is introduced into a cyclone separator for separation, and the obtained lower slurry is a silicon-rich composite slurry; the obtained upper slurry is a carbon-rich composite slurry;

[0073] The carbon-rich composite slurry was subjected to solid-liquid separation. After the solid-liquid separation, a carbon-rich mud cake was obtained, which was then dried in an oven at 110° C. for 6 hours to obtain a carbon-rich adsorption material. The carbon content of the carbon-rich adsorption material was 79 wt%. After testing, the iodine value was 553.6 mg / g, and the methylene blue adsorption capacity was 147.1 mg / g.

[0074] Preparation of carbon-rich composite adsorbe...

technical field

[0001] The invention belongs to the field of resource utilization of solid waste, in particular to a comprehensive utilization method of coal gasification fine slag. Background technique

[0002] Coal gasification technology is one of the core contents of clean coal technology. Incomplete oxidation of coal to obtain combustible coal gasification gas (such as crude gas) for downstream use has rapidly become an important direction of coal resources and energy utilization in recent years. In the past 20 years, my country has built a number of coal chemical enterprises in Yulin, Shaanxi, Ordos, Inner Mongolia, Changzhi, Shanxi and other places, which have been put into production one after another, and the output has increased year by year. The clean and comprehensive utilization of coal resources has formed a certain scale in my country.

[0003] In the coal gasification technology system, while most of the carbonaceous part of the coal is converted into gas, th...

Examples

Embodiment 1-1

[0066] Weigh 500g of coal gasification fine slag (moisture content 55%), add water to dilute to 10% solid content, and use a high-speed dispersion mixer (Guangdong Foshan Yifu Machinery Co., Ltd.) to stir at room temperature. The stirring conditions are: the speed is 1600r / min, Stir for 20min. The slurry is introduced into a cyclone separator for separation, and the obtained lower slurry is a silicon-rich composite slurry; the obtained upper slurry is a carbon-rich composite slurry;

[0067] The carbon-rich composite slurry was subjected to solid-liquid separation to obtain a carbon-rich mud cake, which was then dried in an oven at 110° C. for 6 hours to obtain a carbon-rich adsorption material. The carbon content of the carbon-rich adsorption material was 83 wt%. After testing, the iodine value was 541.7mg / g, and the methylene blue adsorption capacity was 116.5mg / g.

Embodiment 1-2

[0069] Weigh and weigh 500g of coal gasification mud (55% of which contains water), add water to dilute to a solid content of 20%, and use a high-speed dispersion mixer (Guangdong Foshan Yifu Machinery Co., Ltd.) to stir at room temperature. The stirring conditions are: the speed is 1600r / min, Stir for 40min. The slurry is introduced into a cyclone separator for separation, and the obtained lower slurry is a silicon-rich composite slurry; the obtained upper slurry is a carbon-rich composite slurry;

[0070] The carbon-rich composite slurry was subjected to solid-liquid separation. After the solid-liquid separation, a carbon-rich mud cake was obtained, which was then dried in an oven at 110° C. for 6 hours to obtain a carbon-rich adsorption material. The carbon content in the carbon-rich adsorption material was 81 wt%. After testing, the iodine value was 526.81 mg / g, and the methylene blue adsorption capacity was 123.2 mg / g.

Embodiment 1-3

[0072] Weigh and weigh 500g of coal gasification mud (55% of which contains water), add water to dilute to a solid content of 20%, and use a high-speed dispersion mixer (Guangdong Foshan Yifu Machinery Co., Ltd.) to stir at room temperature. The stirring conditions are: the speed is 1600r / min, Stir for 60min. The slurry is introduced into a cyclone separator for separation, and the obtained lower slurry is a silicon-rich composite slurry; the obtained upper slurry is a carbon-rich composite slurry;

[0073] The carbon-rich composite slurry was subjected to solid-liquid separation. After the solid-liquid separation, a carbon-rich mud cake was obtained, which was then dried in an oven at 110° C. for 6 hours to obtain a carbon-rich adsorption material. The carbon content of the carbon-rich adsorption material was 79 wt%. After testing, the iodine value was 553.6 mg / g, and the methylene blue adsorption capacity was 147.1 mg / g.

[0074] Preparation of carbon-rich composite adsorbe...

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