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Briquette and calcium carbide preparation method and calcium carbide preparation system

A technology of briquette and calcium carbide, used in the petroleum industry, special forms of dry distillation, solid fuels, etc., can solve the problems of increased production cost, waste, low concentration of ionic liquid aqueous solution, etc. cost reduction effect

Inactive Publication Date: 2016-08-24
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the washing process after the second time, the concentration of the ionic liquid aqueous solution produced is low, and it will consume a large amount of electric energy to remove water and recover the ionic liquid through vacuum distillation, which will increase the production cost.
Therefore, at present, this part of the ionic liquid wastewater solution is basically directly discharged, which not only has an impact on the environment, but also has huge waste due to the high price of the ionic liquid.
[0003] At the same time, with the development of the modernization of the coal mining industry, the proportion of pulverized coal in raw coal is as high as 70%-80%. However, the current coal utilization industry has certain requirements on the size and shape of coal, especially the calcium carbide industry. , can only use lump semi-coke as raw material, resulting in tight supply of lump coal resources and a large backlog of pulverized coal

Method used

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  • Briquette and calcium carbide preparation method and calcium carbide preparation system
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preparation example Construction

[0036] figure 1 The schematic diagram of the process flow for the preparation method of calcium carbide provided by the embodiments of the present invention, as figure 1 As shown, the method includes:

[0037] The first step: raw material pretreatment, that is, the medium and low rank coal is crushed to <1mm through the crushing device; the second step: mixed aging: add ionic liquid wastewater solution to the coal powder, and the amount of water added is 10% of the mass of the coal powder- 50%; wherein, the type of ionic liquid referred to in the present invention is mainly imidazole ionic liquid with strong compatibility to biomass, that is: the cation is N-methylimidazolium cation, and the anion is acetate ion, chloride ion , trimethyl phosphate and other acid radical ions; the content of ionic liquid in the ionic liquid wastewater solution is 5%-30%; the aging time is 30-75 minutes;

[0038] Step 3: Forming. The forming device used in this embodiment is a common ball pres...

Embodiment 1

[0069] Using long-flame coal as the raw material, the particle size of the raw coal is first crushed to <1mm by a crushing device, and then the pulverized coal is placed in the aging tank, and an ionic liquid wastewater solution with a mass of 50% of the pulverized coal is sprayed. The concentration of the ionic liquid aqueous solution is 8 %, the amount of ionic liquid added is 4.0% of the total mass of pulverized coal; after mixing evenly, it is transported to a briquetting machine by a screw feeder for molding. The obtained balls are dried while being conveyed in a closed heat preservation conveying device at 180°C. The drying medium comes from the flue gas of the subsequent preheating furnace, and is conveyed in reverse with the balls. The dried balls carry heat directly into the preheating Furnace for pyrolysis, the temperature of the preheating furnace is 650°C to obtain high-quality oil and gas products and high-temperature pellets. The high-temperature pellets are tran...

Embodiment 2

[0071] The raw coal in this embodiment is gas coal. First, the particle size of the raw coal is crushed to <1mm by a crushing device; then, the pulverized coal is placed in an aging tank, sprayed with an ionic liquid wastewater solution with 15% of the pulverized coal mass, and continuously stirred, the concentration of the ionic liquid aqueous solution is 25%, and the ion The amount of liquid added is 3.75% of the total mass of pulverized coal; after mixing evenly, it is transported to the briquetting machine by a screw feeder for molding. The obtained balls are dried while being conveyed in a closed heat preservation conveying device at 180°C. The drying medium comes from the flue gas of the subsequent preheating furnace, and is conveyed in reverse with the balls. The dried balls carry heat directly into the preheating The furnace is used for pyrolysis, and the temperature of the preheating furnace is 780°C to obtain high-quality oil and gas products and high-temperature pel...

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Abstract

The invention discloses a briquette and calcium carbide preparation method and a calcium carbide preparation system. The briquette preparation method includes: crushing and screening low-and medium-rank coal to obtain low-and medium-rank coal powder; adding the low-and medium-rank coal powder into an ageing device, and mixing and ageing with ionic liquid wastewater solution; sending products obtained after mixing and ageing into a forming device to obtain briquettes in a preset shape; drying the briquettes to obtain the briquettes in the preset shape. The briquettes prepared according to the method are fed into a preheating furnace for pyrolysis to obtain oil-gas products and high-temperature briquette semicoke, and the high-temperature briquette semicoke is mixed with quick lime to obtain liquid calcium carbide and calcium carbide furnace gas by smelting.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of briquette and calcium carbide and a preparation system of calcium carbide. Background technique [0002] As an emerging green solvent for natural cellulose, ionic liquids have attracted much attention because of their strong solvency, non-volatility, and good chemical stability. At present, the process of preparing regenerated cellulose functional membrane with ionic liquid as solvent has been patented and industrialized production has been realized. In this process, the cellulose is dissolved in the ionic liquid, and after being made into a cellulose film, it needs to be washed many times to remove the ionic liquid, so a large amount of ionic liquid aqueous solution will be produced. Especially in the washing process after the second time, the concentration of the aqueous solution of the ionic liquid produced is low, and it will consume a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/04C10L5/14C10B53/08C10B57/10C10B57/06C01B31/32
CPCC10L5/04C10B53/08C10B57/06C10B57/10C10L5/14C10L2290/08C10L2290/32
Inventor 刘维娜路丙川许修强郭启海张顺利董宾丁力吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD