A visual long-distance dense phase positive pressure pneumatic conveying test device

Abstract

The invention discloses a visual long-distance concentrated-phase positive-pressure pneumatic conveying test device, and relates to the technical field of pneumatic conveying. The device is composed of an air source power system, a feeding-mixing-accelerating system, a pipeline conveying system, a gas-solid separation system, a measuring and monitoring system and a control system. According to thevisual long-distance concentrated-phase positive-pressure pneumatic conveying test device, a multi-parameter-adjustable concentrated-phase positive-pressure pneumatic conveying test can be achieved;visual monitoring is carried out on the flow state of solid powder particles in a conveying pipeline through a capacitive sensor, and parameters such as the solid phase holdup, the solid instantaneous flow rate, the solid accumulated volume flow and the like in the pipeline can be directly measured; concentrated-phase pneumatic conveying tests with different conveying lengths are realized; the internal pressure drop condition of the conveying pipeline can be monitored in real time through a pressure transmitter, so that the blockage situation of the pipeline is automatically distinguished, and the automatic blockage removal function is achieved; and meanwhile, concentrated-phase pneumatic conveying tests under different material-gas ratio conditions can be realized. The visual long-distance concentrated-phase positive-pressure pneumatic conveying test device is mainly used for the test research for monitoring the internal flow type and relevant parameters of the solid powder particlesin the long-distance pipeline conveying process.

Description

technical field [0001] The invention relates to the technical field of pneumatic conveying, in particular to a visual long-distance dense-phase positive pressure pneumatic conveying test device. Background technique [0002] At present, the pneumatic conveying of solid powder particles is mainly divided into dilute phase pneumatic conveying and dense phase pneumatic conveying. Pneumatic conveying technology has been rapidly developed and applied in all countries in the world. The conveying objects have rapidly developed from early flour, grain and letters to metallurgy, cement, chemical industry, mining, electric power and other fields. It is widely used in the bottom of dust collectors in coal-fired power plants in my country. Fly ash transportation, coal mine goaf filling, dry coal powder hydrogenation coal gasification and IGCC power generation and other engineering fields. Due to the low solid-gas ratio of dilute-phase pneumatic conveying, high energy consumption, and se...

AI Technical Summary

Problems solved by technology

At present, the technologies disclosed about the solid powder particle pneumatic conveying device, such as CN201367257Y and CN202529573U, all use gas supply pipelines or blowing aids to realize long-distance dense phase pneumatic transportation. Disturbs the operation law of solid powder particles in the pipeline, which is not conducive to stable transportation; CN105347040A is equipped with a pressure charging port, a powder inlet, and a nitrogen replacement gas pressure charging port on the top head of the discharge type delivery tank to realize high-pressure For the powder transportation of the lower ultra-high dense phase, the delivery pressure of each section of the delivery pipeline cannot be monitored in real time, and it does not have the function of automatic blockage removal, which is prone to blockage; Airflow inlets are arranged around the material opening, and the size of the airflow injection has a great influence on the flow in the tank, which is not conducive to the stable control of conveying, and the concentration of pulverized coal is relatively low; CN103213845A installs a star feeder at the bottom of the material tank to Control the material flow rate, which makes the power running parts added to the delivery tank, which seriously affects the safety of the high-pressure system; CN105858226A and CN201052926 only provide a pneumatic conveying device and method for powder and small particle materials, and do not affect the conveying flow. phase and system control etc.

Images