System for conveying solid raw materials by using supercritical carbon dioxide and conveying method thereof

Abstract

The invention discloses a system for conveying solid raw materials by using supercritical carbon dioxide and a conveying method thereof, and relate to the technical field of energy and chemical industry. The system for conveying the solid raw materials by using the supercritical carbon dioxide and the conveying method thereof aims to achieve the technical effects that the problem that a solid rawmaterial conveying and gasifying device is low in pressure can be solved, the system steam or power consumption is reduced, and the material conveying stability is high. According to the adopted technical scheme, the system comprises a buffering device, a storage bin, a pressurizing device, a material issuing device and a material issuing conveying pipeline, the buffering device is provided with asupercritical CO2 inlet, moreover, an outlet is connected with a supercritical CO2 supply pipeline, a discharging port at the lower end of the storage bin communicates with a feeding port at the upper end of the pressurizing device, the pressurizing device is provided with a pressurized gas inlet, moreover, the pressurized gas inlet communicates with the supercritical CO2 supply pipeline, the discharging port of the pressurizing device communicates with the feeding port of the material issuing device, and the discharging port of the material issuing device communicates with a feeding port ofa high-pressure gasification furnace through the material issuing conveying pipeline.

Description

technical field [0001] The system and method for transporting solid raw materials by supercritical carbon dioxide of the present invention relate to the technical field of energy and chemical engineering, and in particular relate to the transport of solid powder. Background technique [0002] my country is a country rich in coal, poor in oil, and low in gas. Coal will remain the main fossil energy in my country for a long time. At present, the direct combustion and utilization of coal not only has a low utilization rate of energy, but also causes serious environmental pollution, which promotes the development of clean coal utilization technology. Coal gasification technology is the key and leading technology for clean and efficient utilization of coal. At present, gasification technology can be mainly divided into three categories, fixed bed, fluidized bed and entrained bed gasification technology. Among them, the entrained bed gasification technology has gradually become ...

AI Technical Summary

Problems solved by technology

However, the above gasification technologies currently use high-pressure CO 2 The solid powder is transported in dense phase, the operating pressure of the gasifier can only reach 4.5MPa, and the ultra-high pressure CO 2 The stability of conveying solid powder is still a technical problem; however, the coal-water slurry gasification technology has achieved the operating pressure of the gasifier to 6.5MPa and directly removed the downstream system synthesis gas compressor, which greatly reduced the production and operation costs of users. Solid powder gasifier urgently needs to solve the technical problem of 6.5MPa operating pressure

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