1. Waste incineration power plants turn waste around us into treasure
With the continuous advancement of science and technology, waste recycling technology has been rapidly promoted. Waste incineration power plant – a major scientific discovery that can turn most waste into treasure. Let us live cleaner and healthier. Waste incineration power plants will inevitably produce fly ash after incineration. If the fly ash is not handled properly, it will definitely cause secondary environmental pollution.
2. Analysis of the selection of types of pneumatic conveying of waste incineration fly ash
The fly ash gas conveying system is to transport the fly ash flue gas after garbage incineration to the ash storage from the ash hopper of the dust collector after purification. Because fly ash is poisonous and harmful, the national environmental protection department stipulates that the transportation of fly ash should be sealed without secondary pollution. Therefore, we design to use the pneumatic conveying system to convey the fly ash instead of the traditional mechanical conveying system.
There are many forms of powder pneumatic conveying and air conveying. Pneumatic conveying systems can be divided into types: positive pressure conveying, that is, pressure conveying, negative pressure conveying and suction conveying, and positive and negative pressure combined conveying.
How should we choose which conveying system to use for fly ash conveying?
Negative pressure pneumatic conveying:
This system uses wind force, that is to say, air force, to transport materials from one place to the silo. It is suitable for material transportation with a wide accumulation area or deep storage. The feeding method is simple, but compared with the pressure feeding type in terms of transportation, there are certain restrictions on the transportation output and the transportation distance.
Positive and negative pressure combined conveying:
This system is often used in more complex processes of the conveying system. The pneumatic conveying of fly ash involved in us is transported from the dust collector to the silo, and the process is relatively simple. Not very special conveying conditions. It is more convenient, energy-saving and consumption-reducing to use a simple conveying method, and it is more reasonable.
Positive pressure pneumatic conveying:
The system has mature technology, many engineering practices, high conveying efficiency, and will not be affected by changes in conveying conditions. It is suitable for dispersed transportation from one place to many places.
Suitable for large-capacity, long-distance transportation. They are all under positive pressure, and the materials are easily discharged from the discharge port. The location of the air leak can be easily found for timely treatment.
Because the dusty gas does not pass through the inside of the fan, the wear on the fan is less and the service life is long.
Based on the above introduction, it is more about the characteristics of fly ash itself, as well as the requirements of conveying conditions and conveying volume. Therefore, it is more reasonable to choose positive pressure pneumatic conveying for fly ash conveying.
Overview of fly ash pneumatic conveying system
In recent years, for the treatment of fly ash in waste incineration power plants, we often use fly ash low-pressure pneumatic conveying devices. Low-pressure pneumatic conveying is an advanced and effective technology that uses gas energy to transport solid particles, and has a history of more than 100 years. In the development history of low-pressure pneumatic conveying, especially in recent decades, low-pressure pneumatic conveying technology has made rapid progress. The low-pressure pneumatic conveying device is generally composed of a transmitter, a feed valve, an exhaust valve, an automatic control part and a conveying pipeline.
The solution to the problem of waste incineration fly ash will effectively improve the surrounding environmental problems, and is a major measure that benefits the country and the people.
Post time: Mar-15-2023