A pulverized coal pressurized conveying system and process

Abstract

The invention provides a pulverized coal pressure transmission system which comprises a cloth bag filter, a pulverized coal transmission tank, a low-pressure pulverized coal storage tank, a pulverized coal lock hopper, a high-pressure pulverized coal storage tank and a rotary feeder, wherein the cloth bag filter is connected with the pulverized coal transmission tank, the low-pressure pulverized coal storage tank, the pulverized coal lock hopper, the high-pressure pulverized coal storage tank and the rotary feeder in sequence; gas-phase outlets of the low-pressure pulverized coal storage tank, the pulverized coal lock hopper, and the high-pressure pulverized coal storage tank are respectively connected with the cloth bag filter through pipelines; and ventilation guns are respectively arranged in the pulverized coal transmission tank, the low-pressure pulverized coal storage tank, the pulverized coal lock hopper, the high-pressure pulverized coal storage tank and the rotary feeder, and adopt porous pipeline structures. The system adopts the ventilation guns with the porous pipelines as main parts to complete pulverized coal fluidization, pressurization and discharging, and adopts the rotary feeder with a discharging flow-guiding device to achieve the stable transmission and flow adjustment of pulverized coal.

Description

technical field [0001] The invention relates to the technical field of chemistry and chemical engineering, in particular to a pulverized coal pressurized conveying system and process. Background technique [0002] With the increasing scarcity of oil and natural gas resources, people pay more and more attention to the clean utilization of coal. The development of large-scale coal gasification technology is the key to clean utilization of coal resources. Among the large-scale coal gasification technologies, entrained bed technology has attracted much attention. Entrained bed coal gasification technologies mainly include Shell pulverized coal gasification technology (SCGP), G.E. coal-water slurry gasification technology, and entrained bed coal gasification technologies such as GSP, HT-L, CROLIN, two-stage furnace, and E-GAS. Entrained bed coal gasification technology can be divided into two types according to its feeding method: coal water slurry and pulverized coal feeding. ...

AI Technical Summary

Problems solved by technology

This patent uses a rotary feeding valve to control the feeding. The carrier gas does not pass through the ventilation equipment, so the pulverized coal cannot be well fluidized. The dense phase transportation of the pulverized coal is difficult to stabilize, and the pulverized coal flow cannot be accurately controlled; this technology does not have a pulverized coal start-up cycle. circuit, it is difficult to realize the normal ignition of the coal burner; in addition, the sintered metal ventilation plate is expensive, and it is not easy to replace after damage

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