CN101157874A - Coking coal dust shaping technique - Google Patents

Abstract

A process method of coking coal dust forming chiefly aims at settling the problem about a second dust emission in the course of transportation. First, the large quantity of small smut produced by a fluidized bed can be collected by a dust precipitator, be conveyed to a smut collecting storehouse, and constantly transmitted into a high pressure molding machine by an incessant closed conveyer. The feeding mouth of the high pressure molding machine is provided with a repressing screw to ensure the smut entering a high pressure rolling pair to be with certain pressure. Then the smut can be extruded into effigurate briquette, which at last is conveyed into a production coal conveying system after the molding. The process can prevent the production coal from producing the second dust emission during the transportation, thus reducing the engineering investment and environmental pollution with the advantages of less floor space and increasing the coke yield produced by coke oven.

Description

Coking coal dust shaping technique

Technical field

The present invention relates to the treatment process of coking coal dust, especially coking coal dust shaping technique.

Background technology

Coking coal air stream drying technology is at the coke oven coking coal, utilize coke oven flue waste gas, in the nucleus equipment fluidized-bed, coal is carried out classification by granularity requirements, utilize former waste-gas heat to deviate from part moisture in the coal simultaneously, thereby reach the purpose of optimizing the coking coal granularity and adjusting moisture.In fluidized-bed, carry out in the grading and conditioning process, to produce a large amount of tiny coal dusts, characteristics such as this coal dust has that granularity is little, water content is low, loose, easy reentrainment of dust are transported in the finished product coal dust as this coal dust is directly sent into, a large amount of reentrainment of dusts, serious environment pollution will be produced.Pulverized coal forming adopted the interpolation binding agent more in the past, the low pressure molding technology, and this arts demand configuration metering device, major equipments such as multistage whipping device and low pressure molding machine, this just needs floor space big, and process procedure is many, shortcomings such as contaminate environment.

Summary of the invention

The purpose of this invention is to provide a kind of coking coal dust moulding process, this processing method can avoid readymade coal to produce reentrainment of dust in transportation, reduces construction investment, reduces environmental pollution, and floor space is few, can also increase coke oven and produce burnt amount.

The technical solution adopted for the present invention to solve the technical problems is: at first fluidized-bed is produced a large amount of tiny coal dusts and arrive in the coal dust collecting bin by fly-ash separator collection and custody transfer, be transported to coal dust in the high-pressure forming machine continuously by continuous custody transfer equipment then, at the high-pressure molding machine inlet capable preload screw is set, make the coal dust that enters high pressure roller have certain pressure, by high pressure roller coal dust is squeezed into the coal briquette with definite shape then, at last the coal briquette after the moulding is transported to the product coal delivery system.

The invention has the beneficial effects as follows:

This process using high-pressure molding technology, import the coal dust that produces in the coking coal air stream drying technology in the high-pressure forming machine continuously, the readymade coal delivery system will be transported to after the coal dust compression moulding, coal briquette after the moulding has certain intensity, can be not broken in transportation, thus in transportation, can not produce reentrainment of dust.Simultaneously owing to, produce burnt amount thereby will increase coke oven with the coal briquette density height behind the loose coal dust high-pressure molding.This technology has following characteristics:

1. output is big, and this device fabrication moulding coal briquette is three times of high-pressure molding equipment in the past.

2. shaping efficiency height, this technology balling ratio is greater than 85%.

3. this process using binder free straight forming is the outstanding contributions of this technology.

4. this technology has compression ratio height, characteristics that balling-up intensity is big.

5. this technology is safe and reliable to operation, non-secondary pollution, and noise is low.Facility investment is little, and the occupation of land space is little.

Embodiment

This technology adopts the high-pressure molding technology to realize according to the thin characteristic of coking coal dust ash under low moisture.

At first fluidized-bed being produced a large amount of tiny coal dusts arrives in the coal dust collecting bin by fly-ash separator collection and custody transfer, be transported to coal dust in the high-pressure forming machine continuously by continuous custody transfer equipment then, characteristic according to the coal dust ash, for guaranteeing that the coal dust ball after the moulding has certain intensity, at opening for feed preload screw is set, make the coal dust that enters high pressure roller have certain pressure, by high pressure roller coal dust is squeezed into the coal briquette with definite shape then, at last the coal briquette after the moulding is transported to the product coal delivery system.

Its technical process is: fly-ash separator → scrape trigger → grey storehouse → worm conveyor → shaper → conveyor → coal tower.Related equipment is existing installation among the present invention.

Claims (1)

1. coking coal dust shaping technique, it is characterized in that, at first fluidized-bed being produced a large amount of tiny coal dusts arrives in the coal dust collecting bin by fly-ash separator collection and custody transfer, be transported to coal dust in the high-pressure forming machine continuously by continuous custody transfer equipment then, at the high-pressure molding machine inlet capable preload screw is set, make the coal dust that enters high pressure roller have certain pressure, by high pressure roller coal dust is squeezed into the coal briquette with definite shape then, at last the coal briquette after the moulding is transported to the product coal delivery system.