In early 2014, the company, in collaboration with relevant design institutes, fully absorbed and drew on the advanced technologies of similar equipment at home and abroad, and developed a new generation of gypsum slurry dewatering product with independent intellectual property rights, independent innovation technology and prominent features - the high-efficiency disc filter cloth dewatering machine (Patent No. : ZL.2016 1029933.X). It was put into operation at the Changxing Power Plant of Huaneng Power International Corporation Limited in May 2015. This pioneering application became the first successful example in the industry to use the disc filter cloth dewatering machine and achieve good usage results, economic energy conservation and environmental improvement. Since 2015, there have been over 80 power plants and more than 150 units in use. We have cooperative projects with many power groups such as Huaneng, Huadian, Guohua, Guodian, China Power Investment Corporation, Datang, Zhejiang Energy, Guangdong Electric, and Shaanxi Energy.

The main advantages of the high-efficiency disc filter cloth dehydrator over the traditional vacuum belt dehydrator are as follows:

1. Low system energy consumption

Compared with vacuum belt dewatering machines of the same output, it saves more than 75% of electricity consumption. Take Huadian Zhangqiu Power Plant as an example (with a gypsum output of 50 tons per hour), the total energy consumption of a belt dewatering machine is nearly 400KW, while that of a disc filter cloth dewatering machine with the same output is 88KW, saving more than 77% of electricity consumption. The energy-saving advantage is obvious.

Compared with vacuum belt dewatering machines of the same output, it saves more than 80% of water consumption. When the belt dewatering machine is in operation, the filter cloth needs to be continuously flushed. However, the disc filter cloth dewatering machine only requires a system cleaning once before the machine stops after each operation (which takes about 10 minutes and consumes about 6 tons of water), and the water-saving effect is obvious.

2. Small floor space

Compared with the vacuum belt dewatering machine, the disc filter cloth dewatering machine takes up less space, about 20% of the vacuum belt dewatering machine. After the renovation project is completed, the space in the dewatering workshop will be very large, and at the same time, the equipment layout will be more reasonable and beautiful. The advantages of newly-built power plants are more obvious, and the civil construction costs will be greatly reduced.

3. Strong adaptability to materials

The disc filter cloth dewatering machine relies on the micro-porous diaphragm formed by the filter cloth and the solid filter cake adsorbed on the filter cloth during operation, and has a strong adaptability to material changes. In practical application, it has strong adaptability to coal-containing wastewater, oil-containing, high-ash slurry and wastewater sludge, without affecting the dewatering effect. The moisture content and output remain basically stable. Currently, some power plants will repeatedly and in small amounts mix desulfurization wastewater sludge into gypsum slurry for treatment together.

4. Improve the working environment

The temperature of the gypsum slurry is above 60 degrees. The dewatering area of the belt dewatering machine is large and open. During the production process, a large amount of harmful hot steam is generated and spreads throughout the workshop, causing severe corrosion to the equipment and components in the dewatering building. It will have an impact on the physical health of the staff. The dewatering area of the disc filter cloth dewatering machine is small (a disc machine with an output of 50 tons per hour occupies approximately 12 square meters). The equipment itself is equipped with a steam barrier device, and it has a high vacuum. The filtrate flows rapidly, and harmful gases basically cannot diffuse, greatly improving the working environment of the dewatering building.

5. High vacuum degree utilization rate

The high-efficiency disc filter cloth dewatering machine uses vacuum tubes to fully seal and vacuum each filter fan, significantly reducing ineffective power consumption. During dewatering, the vacuum degree can reach -0.06 to 0.075Mpa, while the vacuum belt dewatering machine can only reach -0.03 to 0.04MPa. The vacuum utilization rate is high, and the moisture content control of the filter cake is more guaranteed.

6. Low operating cost

The main consumable part of the disc filter cloth dewatering machine is the filter cloth. If the period is one year, the cost of replacing the filter cloth of the disc filter cloth dewatering machine is approximately 60% of that of the belt conveyor. The belt conveyor operates in a horizontal direction. Besides the filter cloth, it also requires a large number of bearings and idlers, resulting in a considerable amount of maintenance work. Taking into account the annual maintenance cost comprehensively, the maintenance cost of the disc filter cloth dewatering machine is approximately 30-50% of that of the belt dewatering machine.

After the project goes into production, the disc filter cloth dewatering system can significantly reduce the noise, dust, sewage and harmful steam in the dewatering workshop. The equipment has a simple structure with no large or high-speed rotating parts. The main core components and flow-through parts are made of 2205 material, which has strong anti-corrosion properties. Meanwhile, the new equipment has significantly reduced the installation area and operational energy consumption, greatly saving production costs during project construction and daily operation, and is more beneficial for future production management.