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

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...

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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 10% of the weight of coal (dry basis), and the concentration of coal slurry is 33% ~ 70%, and the particle size of coal is less than 300 microns. This invention only involves high-concentration coal-water slurry, which is not disclosed for pipeline transportation, and the concentration value is too wide, and it also contains additives. The concentration of coal slurry in the United States is too thin, and there is an increase Defects in Shipping Costs

Another example is "a slurry pipeline transportation device" applied by "Yunnan Dahongshan Pipeline Co., Ltd." on February 13, 2009. and its anti-blocking control method", the application number is 201010169064.6, both of these two patents are used for general short-distance transportation, not suitable for large-volume, long-distance transportation

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