Negative pressure conveying

The rapid development of economy, the production of all walks of life is also expanding, some industries such as thermal power plants, chemical plants, cement plants, pharmaceutical factories, food processing plants and other raw materials, powder materials in the transmission of production engineering, the environmental pollution has been more and more widespread attention. The negative pressure conveying technology has been gradually promoted. Negative pressure conveying is an important part of cleaner production, which is a kind of modern logistics system suitable for bulk conveying, which is a process of replacing traditional mechanical conveying material with sealed conveying pipeline. Will be a strong advantage to replace the traditional mechanical conveying.

Negative pressure conveyingis a comprehensive technology, it involves in fluid mechanics, materials science, automation technology, manufacturing technology and other fields, is a transport efficiency, less occupied, economic and non-polluting technology.

I. Overview:

For conveying the gas pressure lower than the atmosphere is called negative pressure suction delivery type, negative pressure suction type negative pressure conveying is the engineering

The earliest practical use in history, the most reliable and most mature way of conveying.

Second, the negative pressure system characteristics:

1, the best reliability of environmental protection, the dust in the pipeline will not leak in the environment;

2, equipment manufacturing, maintenance requirements low, the workers are strong operability;

3, the use of pressure (vacuum degree) small, high safety;

4, gas (generally gas) from the atmosphere, the temperature of the gas is the local temperature, the heat sensitive materials, especially

as appropriate;

5, conveying for continuous, also intermittent, no accumulation of pipelines;

6, easy to achieve more points to feed, a lot of unloading the delivery project objectives;

7, the gas power source is generally centrifugal fan, vortex pump, roots fan (pump), long service life;

8, suitable for short distance transmission, generally not more than 100m, the process of transport is particularly appropriate;

9. Strong adaptability to conveying materials, powder and granular materials can be transported smoothly.

Three, the system operation principle:

The negative pressure conveying generally uses the roots vacuum pump as the power source, will the pipeline and the tank storehouse take a certain vacuum condition, causes the air inlet to form the material powder grain material and the gas two-phase flow under the atmospheric pressure, enters the cyclone separator through the transportation pipeline. The two-phase flow separates most of the material from the gas due to the centrifugal force and the gravity action in the cyclone separator. A small amount of material and gas enters the dust collector, separating the powder from the gas through the filter bag function. The gas is discharged into the atmosphere.

Negative pressure conveying is a fully enclosed pipeline conveying system

The layout is not two times pollution high energy-efficient material transportation and recovery, no leakage conveying negative pressure conveying system with a strong advantage. will replace the traditional mechanical conveying. Computer control, high degree of automation

Negative pressure conveying form:

Negative pressure negative pressure conveying system: general working pressure for -0.04~0.08 MPa

Bolong, Kinschender, Macquarie, Hanry and other domestic companies in this field have a lot of experience and technology.

Another kind of and negative pressure conveying is the positive pressure conveying, positive pressure negative pressure conveying system: the general working pressure for 0.1~0.5mpa, we will explain in the future article.