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Pulverized coal molding method without binding agent and double-roller molding machine suitable for method

A binder-free, forming method technology, which is applied in the direction of material forming presses, presses, manufacturing tools, etc., can solve the problems of reduced calorific value of briquettes, limited sources of binders, complex process systems, etc., to achieve The effects of high pelleting strength, simplified raw coal preparation process, and simplified control system

Inactive Publication Date: 2010-06-09
CHNA ENERGY INVESTMENT CORP LTD +4
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Problems solved by technology

There are complex process systems, the addition of organic binders has problems such as insufficient sources of binders and high costs, and the addition of inorganic binders has problems such as reduced calorific value of briquettes

Method used

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  • Pulverized coal molding method without binding agent and double-roller molding machine suitable for method
  • Pulverized coal molding method without binding agent and double-roller molding machine suitable for method
  • Pulverized coal molding method without binding agent and double-roller molding machine suitable for method

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Embodiment Construction

[0033] Below, combine figure 1 , 2 , the specific embodiment of the present invention will be described in detail.

[0034] The pulverized coal binder-free forming method of the present invention comprises the following steps: the first step is to screen out pulverized coal with a particle size of ≤6 mm through a screening device, and perform drying and dehydration treatment on the pulverized coal to control the moisture content to 2-15 mm; %; the second step, the pulverized coal obtained in the first step is fed between the roll gaps of the pair of rollers 2 and 3 of the pair of roll forming machines through feeder 4 (preferred screw feeder) forcibly compressed; the third step, The pair-roll forming machine operates, and the pair of rollers with dimples arranged on the circular surface of at least one roller continuously rotates, and the briquettes are compacted and formed through the dimples.

[0035] In the powdered coal binderless molding method of the present invention,...

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Abstract

The invention provides a pulverized coal molding method without binding agent, which comprises the following steps of: 1. screening pulverized coal with the granularity of not more than 6mm by a screening device, carrying out drying dehydration processing on the pulverized coal and controlling the water content to be 2-15 percent; 2. forcibly compressing and feeding the pulverized coal obtained in the step 1 into a seam between double rollers of a double-roller molding machine by a feeding machine; and 3. running the double-roller molding machine, continuously rotating the double rollers of which at least one roller circular surface is distributed with pits and compacting and molding molded coal by the pits. The invention also provides the double-roller molding machine which is suitable for the method. The invention solves the problem of pulverized coal molding without binding agent of weak caking coal and non-caking coal, such as low-order bituminous coal, middle and old aged lignite, and the like.

Description

technical field [0001] The present invention relates to a pulverized coal molding method, in particular to a pulverized coal binder-free molding method suitable for low-rank bituminous coal, middle-aged lignite and other weakly caking coals and non-caking coals, and the invention also relates to a powdered coal molding method suitable for the method Double roll forming machine. Background technique [0002] Coal is one of the main energy sources in the world. In my country's energy production and consumption, coal occupies a dominant position. However, compared with other energy sources, the direct combustion and utilization of coal will bring about environmental pollution problems. Therefore, countries all over the world are vigorously developing clean coal technology. As a clean coal technology product, briquette has attracted much attention. At present, the main pulverized coal forming processes include two types: binder forming and binder-free forming. Stamping and ro...

Claims

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Application Information

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IPC IPC(8): B30B11/16
CPCB30B11/16
Inventor 邵俊杰王继生朱书全苏晓辉张平郝兵张光宇王素玲曾鸣何立新崔郎郎
Owner CHNA ENERGY INVESTMENT CORP LTD
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