Analysis of principle and technology of low carbon energy saving low temperature sludge drying equipment

Sludge is the product of sewage treatment, its water content can be as high as 90%, organic matter content is high, easy to decay. At present, the most effective way to treat sludge is low temperature sludge drying. The purpose of low temperature sludge drying is to reduce and sanitize. Drying does not change the properties of sludge itself, and the low-temperature sludge drying equipment adopts low-temperature drying mode, which is not easy to cause sludge degradation or quality problems.

In view of this, whether from the quality of sludge products or drying efficiency, the higher the drying temperature, the better the drying quality and efficiency. However, according to the research, in the drying process, when the ignition energy of sludge dust is very low and the concentration of oxygen and dust reaches a certain amount, explosion will occur. In order to ensure the safe operation of the equipment, low-temperature drying is to reduce the drying temperature as far as possible and reduce the ignition point of dust explosion, which can better ensure the safety of equipment operation.

Process steps of low temperature sludge drying equipment

The purpose of low temperature sludge drying is to quickly remove the moisture in the sludge, so as to adapt to the different disposal requirements of sludge. Drying is to transfer heat to the sludge in unit time to vaporize the water in the sludge, so as to separate the water from the sludge, and then collect the water from the sludge and gasification respectively to complete the drying process. The whole process of low temperature sludge drying equipment can be divided into feeding, drying, gas-solid separation, solid transportation, dust collection, etc.

Advantage analysis of low temperature sludge drying equipment:

1. Low temperature drying can reduce the operation safety of the equipment. In the drying process, low temperature can reduce the volatilization of harmful substances in the sludge, less explosion and other problems, making the operation of the equipment more stable.

2. Energy saving, consumption reduction, production cost reduction. In the face of the same production output, the requirement of low temperature drying for hot air temperature is not high, and the heat consumption in drying process is relatively reduced, so as to reduce energy consumption and production cost investment.

3. Extend the service life of the equipment. Low temperature drying can restrain the corrosion of harmful gases on the equipment, thus effectively extending the service life of the equipment.