Pulverized coal feeding system with self-circulating function

Abstract

The invention provides a pulverized coal feeding system with a self-circulating function. The system supplies pulverized coal to a reactor. The system comprises an injection tank, a nitrogen input valve, a dust remover, a rotating feeding machine, a feedback device, a pressure transmitter, a gas input valve, an online analyzer and a controller. A tank truck provided with a gas distribution systempours the pulverized coal into the injection tank. The injection tank adopts nitrogen gas to carry out fluidization and pressurization, hydrogen is utilized as carrier gas, and the pulverized coal feeding system operates in a self-circulating manner, and then conveys the pulverized coal into the reactor. The pulverized coal feeding system with the self-circulating function can operate in a self-circulating manner, the pulverized coal dense phase conveying process is stable, continuous and high in precision, and the system can adapt to changing of different flow amounts and can adapt to pressure fluctuation of a downstream reactor.

Description

technical field [0001] The invention relates to a pulverized coal feeding system with self-circulation, which belongs to the field of coal chemical industry. Background technique [0002] The clean and efficient utilization of coal is the key to China's realization of a low-carbon economy. The new coal chemical industry combines the advantages of high energy utilization rate, sufficient resource utilization, and low emissions of greenhouse gases such as carbon dioxide. It is a key direction for future development. In reality, there are still many problems to be solved in pulverized coal transportation: For example, during the pulverized coal feeding process, it is difficult to guarantee the stability and controllability of pulverized coal supply, which in turn affects the continuity and uniformity of pulverized coal transportation. The specific performance is as follows: The flow of pulverized coal in the injection tank is unstable; sometimes the pulverized coal cannot be un...

AI Technical Summary

Problems solved by technology

For quite a long period of time, dilute phase transportation is the main method, that is, during the transportation process, the material is suspended in the gas, and the volume concentration fraction does not exceed 10%. Dilute phase transportation requires a large amount of gas, high energy consumption, and gas velocity Faster, resulting in severe material and pipeline wear

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