A coal deep purification system and method

A deep purification and coal technology, applied in the direction of solid separation, flotation, etc., can solve the problems of unfeasible economical flotation, difficult spread of collectors, and unsatisfactory flotation results, so as to improve the comprehensive utilization rate and save reagents The effect of dosage and low ash content

Inactive Publication Date: 2011-12-14
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In conventional flotation, kerosene or diesel oil is directly added into the coal slime water in a liquid state and dispersed under the action of stirring. Theoretically speaking, the thickness of the oil film on the surface of coal particles only needs to be one to two molecules thick, but due to the incompatibility of oil and water, The conventional direct drug delivery method cannot disperse the drug evenly in the pulp, resulting in too large oil droplets, so that the coal particles with a small particle size and a large number collide with each other and contact with the drug droplets with a large particle size and a small number. Opportunities are reduced, leading to high oil consumption, and low-rank coals have low coal ranks, high oxygen-containing functional groups in coal, and poor surface wettability, which tends to be more hydrophilic. Particles are not easy to attach to the air bubbles and it is difficult or impossible to float. Therefore, it can only be compensated by increasing the dosage of chemicals (u

Method used

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  • A coal deep purification system and method
  • A coal deep purification system and method
  • A coal deep purification system and method

Examples

Experimental program
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Embodiment 1

[0020] Embodiment one, as figure 1 As shown, the coal deep purification system is mainly composed of a flotation column 1, a mixing tank 2, a circulation pump 6, a bubble generator 7, an oil storage tank 8, a fuel pump 9, and an oil gas generator 10. The top of the flotation column 1 is provided with a foam The discharge port 4 is provided with a tailings discharge port 5 at the bottom, the mixing tank 2 is connected to the feeding port 3 of the flotation column 1 through the pipeline, the bubble generator 7 is connected to the cylinder of the flotation column 1 through the pipeline, and the bubble generator The inlet of 7 and the outlet of flotation column 1 are respectively connected with circulating pump 6 through pipelines, and bubble generator 7 is connected with an oil-gas generator 10 through pipelines, and oil-gas generator 10 is provided with the spherical container 10-1 of three ports and the device The electric heating jacket 10-2 under the spherical container 10-1 ...

Embodiment 2

[0022] Embodiment two, such as figure 2 As shown, the coal deep purification system is basically the same as the first embodiment, and the same parts are omitted. The difference is that the oil and gas generator 10 is composed of an electric heating plate 10-3 and a conical gas collecting hood 10-4 arranged above the electric heating plate 10-3.

[0023] The method for deep coal purification: the oil and gas outlet of the oil and gas generator 10 is connected to the suction port of the bubble generator 7 through the connecting pipeline, and the connection of the inlet and outlet is sealed; the power supply of the electric heating plate 10-3 of the oil and gas generator 10 is turned on , so that the heating temperature of the electric heating plate 10-3 reaches 200-250°C; turn on the circulation pump 6 of the flotation column 1, so that the 1 / 3-2 / 3 column volume of clear water added in advance in the flotation column 1 will be generated by air bubbles The device 7 circulates ...

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Abstract

The invention relates to a system and a method for deeply purifying coal. The system is composed of a flotation column, a mixing tank, a circulating pump, a bubble generator, an oil storage barrel, a gasoline pump and an oil gas generator. The method comprises the following steps: adding kerosene or diesel oil into the oil gas generator and then heating and evaporating the kerosene or diesel oil,thereby generating kerosene or diesel oil steam; introducing the kerosene or diesel oil steam together with air into a floatation device, thereby generating oil bubbles; and promoting the wetting property of the bubbles under the condition of maintaining the floatation of a mineral main body, thereby achieving the purpose of promoting the floatability of the mineral. The problem of difficulty in flotation of low-rank coals can be solved, the rate of multipurpose utilization of the coal can be increased and the economic value can be promoted. The system and method provided by the invention aresuitable for deeply purifying the low-rank coals with low metamorphic grade, such as brown coal, long flame coal, non-caking coal, weakly caking coal, gas coal, and the like, can be used for greatly promoting the yield of clean coal and can be used for obviously reducing the dosage of the kerosene or diesel oil used as a collecting agent. The system has the advantages that the structure is simple, the operation is convenient, the floatation index of the low-rank coals is excellent and the dosage is small.

Description

technical field [0001] The present invention relates to a deep purification system and method for coal, especially a system and method for deep purification of coal using oil bubbles as a flotation carrier, which is suitable for lignite, long-flame coal, non-sticky coal, weakly sticky coal and gas Deep purification of low rank coal such as coal. Background technique [0002] In conventional flotation, kerosene or diesel oil is directly added into the coal slime water in a liquid state and dispersed under the action of stirring. Theoretically speaking, the thickness of the oil film on the surface of coal particles only needs to be one to two molecules thick, but due to the incompatibility of oil and water, The conventional direct drug delivery method cannot disperse the drug evenly in the pulp, resulting in too large oil droplets, so that the coal particles with a small particle size and a large number collide with each other and contact with the drug droplets with a large pa...

Claims

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Application Information

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IPC IPC(8): B03D1/14B03D1/02
Inventor 王永田刘炯天于伟
Owner CHINA UNIV OF MINING & TECH
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