"Dilute phase pneumatic conveying system": a detailed explanation
"Dilute phase pneumatic conveying system" adopts Roots blower Or the vacuum pump is used as the air source equipment. The parts of the reclaiming device are usually suction gun and volume feeder. The air source equipment is installed at the end of the system. After the fan runs, the whole system forms negative pressure, and the air is sucked into the conveying pipe by the pressure difference between inside and outside the pipeline. At the same time, the material and a part of air are simultaneously sucked in by the suction nozzle and transported to the vacuum feeder. In the vacuum feeder, the material and air are separated, and the separated materials are discharged from the bottom of the vacuum feeder, and the fine particles that are not separated out enter the dust collector for purification with the airflow, and the purified air is discharged into the atmosphere through the dust collector.
1、 Characteristics and advantages
The advantage of the "dilute phase pneumatic conveying system" is that it is easy to take materials, and it is suitable for the occasions where the materials are required to be free from dust; it is suitable for the occasions where the materials are fed from low places, deep places, narrow sampling points and from several places to one place; as the gas source is set at the end of the system, the lubricating oil or moisture will not mix with the transported materials; Because the pressure in the conveying pipe system is lower than the atmospheric pressure, the transported materials will not leak even if there is wear and clearance; because the pressure in the conveying system is lower than the atmospheric pressure, the moisture is easy to evaporate, so the material with more moisture is easier to transport than the pressure feeding type. It is especially suitable for conveying materials in general air drying process and food industry.
2、 It is widely used
"Dilute phase pneumatic conveying system" It is widely used to transport bulk packaging solid materials. When the bulk packaging material is transported by air, the interaction may be caused by the increase of the number of particles, and then the pipe wall will be bent by multiple impacts. It is also possible for particles to slide along the pipe wall in low velocity dense phase flow. These collisions and interactions will generate collision forces on the particles, which may cause damage and disconnection of the pipe wall.
There are advantages and disadvantages. This is the characteristic of all things, "Dilute phase pneumatic conveying system" In the process of transporting goods, the abrasion and damage of solid particles are inevitable, which will affect the quality of particles and transportation quality. Many experiments are devoted to the study of particles "Dilute phase pneumatic conveying system" A loss in. It was proposed by Bell et al. That the relationship between the wear ratio and the salt particle transfer parameters was obtained through a three straight pipe and elbow pipe transportation experiment. Kalman and goder confirm that "Dilute phase pneumatic conveying system" The crushing rate after passing through the particles. Several experiments were carried out by Kalman, and the effects of various parameters were taken into account to provide preset wear criteria for the inflow particles, such as particle strength (determined by material, size and pattern), operating parameters (particle velocity and loading rate), and bending structure (bending radius, material structure, type and number of bends).
Summary: "Dilute phase pneumatic conveying system" Generally, the conveying distance can reach several hundred meters with high air velocity and low solid gas ratio. Air or nitrogen is often used to transport gas, and the power is generally controlled by Roots blower Yes, the material is suspended in the pipeline. The conveying mode can be divided into pressure (positive pressure) type and suction (negative pressure) type. The main characteristics of pressure conveying are large conveying capacity, long conveying distance and stable operation. The main feature of suction conveying is that it can be transported from low place (or bulk), multi-point to high place and one point. Pressure and suction can be combined to meet special conveying requirements.
"Dilute phase pneumatic conveying system": Details: http://theoxfordjazz.com/qlss/137.html
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