A pulverized coal forming dry distillation method using waste as a binder

Abstract

The invention discloses a pulverized coal forming and dry distillation method employing a waste as a binder. The method comprises the following steps: crushing and sieving coal to obtain pulverized coal; heating water to 80-100 DEG C, mixing and fully stirring heavy coal tar pitch, a tar residue and polyaluminum ferric chloride in sequence, fully stirring, pouring a mixture to dolomite powder when the mixture is softened, heating and stirring the dolomite powder into a sticky paste material to obtain the binder; carrying out cold press molding on the mixture obtained by compounding the prepared binder and the pulverized coal in a forming mould at a pressure of 8-20MPa to obtain briquette coal; carrying out low-temperature pyrolysis on the prepared briquette coal product in a dry distillation furnace at 500-750 DEG C for 2-4 hours to obtain semi-coke, coal tar and a coal gas. According to the method, a feasible way is provided for semi-coke production in short of raw lump coal, the problem that the tar residue of a factory cannot be effectively utilized is solved to the maximum extent; and the coal tar in the tar residue is completely squeezed, the oil yield rate of the briquette coal is improved and refuse reclamation is achieved, so that the utilization value of the pulverized coal is improved.

Description

technical field [0001] The invention relates to the technical field of semi-coke production in coal chemical industry, in particular to a pulverized coal forming dry distillation method using waste as a binder. Background technique [0002] Semi-coke (semi-coke) is a kind of high-fixed carbon combustible solid material obtained from Jurassic non-sticky and weakly sticky lump coal with a thickness of 30-80 mm, which is obtained by pyrolysis at medium and low temperatures. It has "three highs and four lows" It is a new generation of clean and environmentally friendly fuel. However, as the birthplace and main production area of ​​the national semi-coke industry, after years of development, the semi-coke industry has become the largest coal chemical industry and an important local economic pillar in Yulin City, but with the continuous improvement of mechanization, coal mining The method has changed from blast mining to fully mechanized mining, and the semi-coke industry has a s...

AI Technical Summary

Problems solved by technology

The waste residues such as tar residue, heavy coal tar pitch and fly ash produced in the above process will seriously pollute the environment if they are directly discarded. Tar residue and heavy coal tar contain a large amount of carcinogens, pollute water bodies and soil, and seriously Threat to human health; fly ash is the chief culprit of smog weather due to its tiny particles, which pollute the atmosphere when exposed to the air

Images