Large-volume long-distance airtight relay pipeline coal handling system and method

A technology of coal conveying system and transportation system, which is applied in the direction of transportation and packaging, conveyors, and conveying bulk materials. The occurrence of traffic accidents, the ease of use and operation, and the effect of reducing transportation pressure

Inactive Publication Date: 2013-01-09
WUHAN DESIGN & RES INST OF CHINA COALTECH & ENG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The development of the pipeline transportation industry has a history of more than 100 years, among which oil, natural gas, coal and other minerals are transported through pipelines. The United States began to study pipeline transportation in the laboratory in the 1880s. It has been used for pipeline transportation of coal since the 1990s, and the concentration of coal-water slurry is set to 45% to 49%. The cost of transportation at this concentration is too high, and there are defects in low-efficiency transportation; Chinese patent ZL85100543.8, sensitized by the Chinese Academy of Sciences The "high concentration coal water slurry" invented by the Institute of Chemistry, the coal water slurry contains additives, the additive is humic acid sodium salt, the dosage is between 0.05% and 1

Method used

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  • Large-volume long-distance airtight relay pipeline coal handling system and method
  • Large-volume long-distance airtight relay pipeline coal handling system and method
  • Large-volume long-distance airtight relay pipeline coal handling system and method

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Embodiment 1

[0055] 1. Main design parameters of pipeline transportation process

[0056] 1. Design coal slurry concentration, flow velocity and pipe diameter

[0057] The weight of the coal slurry in this design is 53%, and the pipeline transportation flow rate must meet the requirements of safe flow velocity and transportation volume at the same time. The selection of pipeline transportation concentration, flow velocity and pipe diameter of this project is shown in Table 4-4-2.

[0058] Pipeline Diameter Corresponding to Design Velocity Table

[0059] Table 4-4-2

[0060]

[0061] 2. Conveying resistance

[0062] According to the selected pipe diameter and transport concentration, and according to the laboratory experiment data, design the resistance at the design flow rate of each section of the pipe as shown in Table 4-4-3.

[0063] List of pipe diameter and friction loss

[0064] Table 4-4-3

[0065]

[0066] 3. Pipeline flow

[0067] See Table 4-4-4 for the normal deliver...

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Abstract

The invention discloses a large-volume long-distance airtight relay pipeline coal handling system and method. The delivering process includes the steps that coal slurry is fed into a loop pipeline through a slurry feeding pump and then fed into a main delivery pump and a pipeline of a first-level pump station after detected qualified, and main pumps are used for adding pressure to deliver the qualified coal slurry air tightly to a second relay pump station and the pipeline and finally to a user terminal. A clean water pool and a waste slurry pool are arranged in each pump station which is composed of a relay pump station and a transfer pump station; a pressure instrument and an overpressure tapping valve are arranged on an inlet manifold and an outlet manifold of each pump station and each pump; buffer gas tanks are arranged at the inlet and outlet of the main pumps; and the main pumps in each pump station are in a parallel connection, and an electron coupling mode is adopted to control the start and stop of the pumps. According to the system and the method, the structure is reasonable, the automation degree is high, the utilization and operation are simple and convenient, transportation pressure of trains and automobiles is reduced, abrasion of heavy-load automobiles to roads is reduced, and traffic accidents are reduced.

Description

technical field [0001] The invention relates to pipeline transportation, in particular to a large-capacity long-distance closed relay pipeline coal transportation system and method. Background technique [0002] The development of the pipeline transportation industry has a history of more than 100 years, among which oil, natural gas, coal and other minerals are transported through pipelines. The United States began to study pipeline transportation in the laboratory in the 1880s. It has been used for pipeline transportation of coal since the 1990s, and the concentration of coal-water slurry is set to 45% to 49%. The cost of this concentration of transportation is too high, and there are defects of low-efficiency transportation; Chinese patent ZL85100543.8, sensitized by the Chinese Academy of Sciences The "high concentration coal water slurry" invented by the Institute of Chemistry, the coal water slurry contains additives, the additive is humic acid sodium salt, the dosage i...

Claims

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Application Information

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IPC IPC(8): B65G53/30
Inventor 吴嘉林张卫东周秀隆涂昌德甘正旺
Owner WUHAN DESIGN & RES INST OF CHINA COALTECH & ENG GROUP
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