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A method for pipeline transportation of molded coal and molded coke

A technology of pipeline transportation and coke molding, applied in conveyors, transportation and packaging, petroleum industry, etc., can solve the problems of large demand for water resources and low efficiency of pipeline transportation, and achieve low maintenance costs, reduced impact, and reduced water demand. Effect

Active Publication Date: 2015-11-18
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a matching method for pipeline transportation of coal-water slurry or water-coke slurry and molded coal or molded coke, so as to solve the problems of low pipeline transportation efficiency and large demand for water resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] 2) Preparation of pipeline transportation carrier: mix graded solid particles according to the ratio of solid particles to water mass ratio of 0% to 80%: 100% to 20%, and make a pipeline transportation carrier after fully stirring; the preferred The mass ratio is: total particle size distribution of raw coal or semi-coke or coke: water = 10% to 55%: 90% to 45%.

[0038] 3) Make briquettes and coke as conveying objects: make briquettes and coke according to the specifications of the delivery pipeline;

[0039] For the shape of the conveyed object, select spherical coal, molded coke, columnar molded coal, and molded coke; the molded coal is prepared by cold pressing or hot pressing; the molded coke can be cold pressed or hot pressed with a binder.

[0040] The diameter of spherical briquettes and molded coke depends on the inner diameter of the pipe. Coal transportation pipelines with a pipe inner diameter of 20-500mm use spherical briquettes and molded cokes with a diame...

Embodiment 1

[0045] In this embodiment, the total amount of particles graded by the transport carrier is used: water = 0%: 100%, that is, water is used as the transport carrier; then the molded coal is formed by cold pressing without binder, and the coke is formed by cold pressing with binder, and finally Prepare columnar briquettes and cokes with a diameter of 15mm and a length-to-diameter ratio of 1.3, and transport them through coal pipelines with an inner diameter of 20mm.

[0046] The following examples use graded granules and water prepared according to the mass ratio as the carrier for pipeline transportation.

Embodiment 2

[0048] After crushing, grinding, and screening, the maximum particle diameter of raw coal or semi-coke or coke solid particles is ≤1mm, accounting for 100% of the solid particles in the carrier;

[0049] Diameter ≤ 0.700mm accounts for 93% of the solid particles in the carrier;

[0050] Diameter ≤ 0.500mm accounts for 78% of the solid particles in the carrier;

[0051] Diameter ≤ 0.300mm accounts for 70% of the solid particles in the carrier;

[0052] Diameter ≤ 0.150mm accounts for 53% of the solid particles in the carrier;

[0053] Diameter ≤ 0.075mm accounts for 40% of the solid particles in the carrier;

[0054] Diameter ≤ 0.045mm accounts for 30% of the solid particles in the carrier;

[0055] The total amount of grading particles of the conveying carrier: water = 10%: 90%; the briquette is hot-pressed without binder, and the coke is hot-pressed with binder, and finally prepared into a 20mm diameter and an aspect ratio of 1.5 Columnar briquettes and cokes are transpor...

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Abstract

A disclosed pipeline transportation method for briquette and formed coke comprises: 1) selection and gradation of a pipeline transportation carrier; 2) mixing the gradated solid particles and water with a mass ratio of 0%-80%:100%-20% to prepare the pipeline transportation carrier; 3) preparing the briquette and the formed coke as transportation materials according to the specification of the transportation pipeline; 4) coating and immersing the briquette and the formed coke with the pipeline transportation carrier, and then carrying out pipeline transportation. The invention provides corresponding gradation of the pipeline transportation carrier. According to the method, the transportation materials are coated and immersed by the transportation carrier for pipeline transportation; the transportation carrier has a viscosity less than 100 cp, and a lowest viscosity less than 20 cp; the method can help to reduce friction resistance in the pipeline transportation process and effectively control the subsidence velocities of the briquette and the formed coke, and therefore helps to realize effective migration of the briquette and the formed coke in the pipeline; the transportation efficiency is improved, the water demand amount is reduced, and thus the pressure of a downstream dehydration process is reduced and the production cost is reduced; and the storage of the transportation materials which comprise the briquette and the formed coke is convenient, and the method is wide in application scope and has no pollution to the environment.

Description

technical field [0001] The invention relates to the field of energy transmission, in particular to a method for pipeline transportation of molded coal and molded coke. Background technique [0002] The development of energy transmission facilities and related supporting technologies is one of the key issues of energy utilization efficiency. The long-distance transportation methods of traditional coal fossil resources, such as ships, trains and automobiles, have transportation losses, environmental pollution, and long cycles to varying degrees. The problem is that it does not take advantage of ecological environment protection and does not meet the requirements of green transportation of coal resources. Pipeline transportation is widely used because of its advantages such as strong terrain adaptability, small footprint, no pollution during transportation, no loss in the process, closed safety, and less personnel support. At present, coal transportation by pipeline is mainly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32B65G51/04
Inventor 郑化安王小宪付东升李应平吕晓丽
Owner SHAANXI COAL & CHEM TECH INST