A high-pressure dilute-phase small-volume feeding device and control method

Abstract

The invention discloses a high-pressure dilute phase small material amount feeding apparatus and a control method. The length of an air supply pipe extending into the bell mouth of the lifting sectionis adjusted by controlling the height of the lifting section, thereby adjusting the flow area of the feeding. The fluidized powder enters the lifting pipe through the bell mouth, and the feeding amount into the lifting pipe is controlled by adjusting the flow area between the air supply pipe and the bell mouth. The high-pressure gas enters the lifting pipe through the air supply pipe to ensure the stability of the conveyance, thereby realizing the dilute phase small material amount feeding of the high-pressure feeding and discharging type sending tank. According to the high-pressure dilute phase small material amount feeding apparatus, the feeding apparatus is simple in structure, safe and reliable, the feeding mass flow rate can be accurately and rapidly adjusted, and the material conveying discontinuity is effectively avoided. The high-pressure dilute phase small material amount feeding apparatus and control method can be widely applied to the fields of energy, chemical engineering,medicine, mining, food processing or the like.

Description

technical field [0001] The invention belongs to the research field of high-efficiency and clean utilization of coal, and relates to equipment for realizing high-pressure dilute-phase small-volume feeding in high-pressure pneumatic conveying. Background technique [0002] Large-scale high-efficiency coal gasification technology is one of the important fields of research on efficient and clean utilization of coal. The pressurized feeding technology of pulverized coal into the furnace is one of the key issues of dry pulverized coal gasification, which plays a vital role in the safe and stable operation of the entire coal gasification process system. A stable and controllable delivery can be achieved. As one of the commonly used feeding devices, the sending tank is a kind of volumetric feeder. It is a device that sends powder materials into the conveying pipeline and fully mixes them with the conveying air flow. One of the important components of the gasification furnace, its ...

AI Technical Summary

Problems solved by technology

Due to the low speed, high solid phase concentration, complex flow form and reduced flow stability in the pneumatic conveying of high-pressure dense phase powder, the technical requirements and conditions of the system are quite different from those of the general conveying system.

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