KR890001920B1 - A process for the high caloric coal from low quality by the utilization of carbon black - Google Patents

Abstract

Low quality coal (1800-3100 kcal/kg) is improved by mixing with soot from Bc boiler. Thus, pulverize low-grade coal (2900kcal/kg) to 100- 120 mesh, mix powd. coal (former, 54%) and soot (46%) to give solid high caloric coal (4510kcal/kg).

Description

High deterioration method of low quality coal using soot

The present invention relates to a method of producing a solid fuel having a high calorific value by mixing low coal containing 1800-3100 kcal / kg of calorific value stored throughout the country with soot collected in a dust collector of an industrial oil boiler. . Conventionally, a method of using low-carbon coal is to make a hole coal by mixing banca seed oil and a small amount of coagulant with a low-carbon coal having a heating flow of about 3000 kcal / kg, but this hole coal removes heavy metal substances of sulfides contained in the banca oil. Not only does it generate toxic gas during combustion, but also mixes expensive banca seed oil, making it uneconomical with high production costs.

In consideration of such economics, the present invention collects soot (Dust) generated by incomplete combustion at the time of burning oil (Bc) in an industrial oil boiler in a dust collector installed under the chimney, and generates a low calorific value by mixing with low quality coal that has been discarded and wasted. It aims to expand energy resources and supply more economical solid fuels by developing low-carbon coal, which has no value in its own calories, to be used as industrial and household fuels.

Soot is a black ash produced by incomplete combustion in an industrial oil boiler and accumulated in a dust collector installed in a chimney. The analysis results of the National Institute of Industrial Testing according to KSE 3705-82, 3706-82, and 3707-82 are as follows.

The soot calorific value is 6400kcal / kg and the amount of heavy oil (BC) used in industrial oil boilers is estimated to be about 11.1 million tons per year, while the amount of soot produced by incomplete combustion is 2% -10%. It is estimated that 230,000 to 1.15 million tons of soot is collected annually, so it is not suitable to be blown or buried, so it is difficult to dispose of only environmental pollution. By mixing it at an appropriate ratio, it provides high-temperature solid fuel, so that it is useful to recycle soot, which was difficult to dispose of, to expand energy resources and to supply economical solid fuel. This will be described in detail according to an embodiment as follows.

Example 1

The collected 2900 kcal / kg of low-carbon coal is pulverized to a 100-120 mesh by a pulverizer and 54% of low-carbon coal and 46% of soot are mixed to obtain a solid fuel having a calorific value of 4510 kcal / kg.

Example 2

The collected 2900 kcal / kg of low quality coal is pulverized to a 100-120 mesh with a pulverizer and mixed with low carbon 68% and soot 32% to obtain a calorific value of 4020 kcal / kg of solid fuel.

Example 3

2,500 kcal / kg of coal is crushed 100-120 mesh and 74% of coal and 26% of soot are mixed to obtain 3514 kcal / kg of solid fuel.

Example 4

2,500 kcal / kg of low-carbon coal is crushed 100-120 mesh and 60% of low-carbon coal and 40% of soot are mixed to obtain 4060 cal / kg of solid fuel.

Example 5

The collected 3100kcal / kg low-carbon coal is pulverized into 100-120 mesh and 82% of low-carbon coal is mixed with soot 18% to obtain a calorific value of 4310kcal / kg solid fuel.

As such, the soot may be mixed according to the calorific value of the low quality coal, which could not be used as a fuel, to provide solid fuel having the calorific value required for each of the anthracite coal and lignite, and the soot accumulated in the dust collector due to incomplete combustion in an industrial oil boiler. Because it is incompletely burned, it is highly combustible and it is first-burned, so it has less toxic gas, promotes combustion of low-carbon, and recycles soot, which was difficult to dispose of due to pollution, as a fuel, eliminating environmental pollution, and high-temperature of low-purity low-carbon. As a fuel for gasoline fuels, the expansion of energy resources can replace imported coal and supply economical solid fuels.

Claims (1)

A method of high deterioration of low carbon using soot characterized in that the deterioration of the coal and sooty pulverized coal 100-120 mesh.