Views: 6873 Author: Site Editor Publish Time: 2015-05-07 Origin: Site
I. Project overview
Date of signing: 2015-05-07
Processing materials: municipal sludge, clay
Processing capacity: 200,000 m³/a
Equipment configuration: Φ2.5m rotary kiln, vertical cooling machine, scale conveyor, belt machine, box feeder, dust collector, drum screen and other equipment (two lines)
A company in Guangdong Province, the main business is to reduce, stabilize, harmless treatment and disposal of general industrial solid waste and strictly controlled waste and comprehensive utilization of resources. In order to realize the harmless treatment of municipal sludge, two production lines with an annual output of 100,000 square meters of sludge clay ceramic were built in May 2015. The project includes sludge aging storage, batching mixing, granulation, preheating, calcination, cooling, waste gas treatment and oil and gas mixing and burning through multi-channel burners. The solution and all the host, supporting equipment and control platform were designed and produced by our company, and the equipment was installed in May 2016.
The production line adopts the advanced granulation process in the kiln, the double-barrel plug-in rotary kiln to control the preheating and roasting process of the materials and the supporting energy-saving vertical cooler and other technologies, and adopts a variety of safety, environmental protection and energy saving measures, using the surrounding urban sludge as raw materials and adding clay as admixture for the preparation of pottery particles. Its advanced technology, reasonable layout, excellent indicators, smooth acceptance and production, laying a solid foundation for continued cooperation between the two sides in the next step.
II. Solution
On the basis of traditional construction ceramic preparation, the two sludge clay ceramic production lines in this project adopt new technologies and solutions for pelleting, tail gas treatment, cooling, kiln sealing and other issues:
1) The plug-in double-barrel rotary kiln can realize the preheating and roasting of materials in different rotary kilns, respectively control their respective speed, change the residence time of materials, and achieve reasonable operating parameters. At the same time, the chain, spiral plate and grate plate are set in the preheating kiln, the granulation link is moved in the kiln, and the preheating, granulation and calcination are set in a equipment, eliminating the granulation equipment, making full use of the exhaust gas heat in the kiln, and achieving good results.
2) The exhaust gas from the kiln tail is disposed of by the cyclone dust collector, and then desulfurized by three desulfurization towers and photocatalytic devices. Three desulfurization towers are water spray tower, acid spray tower and alkali spray tower, water, acid and alkali and have their own perfect circulation cooling system and supplement system, these equipment to remove sulfur dioxide and other harmful components in the exhaust gas, in the environmental requirements are extremely strict at this stage, for the environmental protection permit to remove obstacles.
3) The use of multi-channel burners to achieve mixed combustion of oil and gas, and can use waste oil as supplementary fuel, can save more than 80 tons of coal and reduce production costs. The ignition and release device is set on one side of the kiln to ensure the safety of personal equipment after shutdown.
4) The kiln head adopts the integrated design and construction of the vertical cooler and the kiln head cover, which covers a small area and has good sealing performance, effectively avoiding the organized emission of hot exhaust gas.
5) The sealing of rotary kiln adopts stainless steel fish scale sealing method, which reduces the leakage of external air, and also reduces the unloading of materials, durable, environmental protection and energy saving.
III. Project site
