The first company in Dongguan with a total investment of 390 million yuan Sludge treatment The plant will be officially put into operation next month. After more than half a year of trial operation, the daily sludge treatment capacity of the plant is more than 500 tons. Through technical treatment, sludge is not only transformed into a new type of plate, but also widely used for aluminum plastic sandwich, outdoor floor, urban greening and other purposes. It can also be used to manufacture biomass liquid fuel and other items.
At present, the environmental protection acceptance of the project has been carried out, and the Municipal Environmental Protection Bureau recently invited the media to visit the site.
35 transport vehicles are fully armed to prevent leakage
A total of 34 sewage treatment plants have been built in Dongguan, producing thousands of tons of sludge every day. Four years ago, Dongguan began to find a way out for sludge and explore the construction of sludge treatment plants.
"The sludge is high in water content, easy to rot, and has a strong odor. It also contains a large number of pathogenic bacteria, parasite eggs, and a large number of toxic and harmful heavy metals." Qi Jihong, chief engineer of Huangjiang Sludge Treatment Plant, said that if not properly treated, it will bring secondary pollution to water and soil. At present, 34 sewage treatment plants in Dongguan can produce thousands of tons of sludge per day.
"We invested 390 million yuan to build a sludge treatment plant in Huangjiang, and the equipment was installed and put into trial operation last July." Wu Shaofeng, chairman of Jinmao Environmental Protection Investment Co., Ltd., told reporters that the project was completed and put into trial operation last July.
At present, there are 35 special transport vehicles in the sludge treatment plant. The sludge produced by 34 sewage treatment plants in the city will be transported by special sealed sludge transport vehicles every day, and the transport capacity of each vehicle is 15 tons. At the same time, in order to ensure safety, each vehicle is equipped with a satellite positioning monitoring device and emergency measures for sludge leakage. The control center of the sludge treatment plant can monitor the whole process of the sludge transport vehicle.
"During the trial operation, the daily handling capacity is more than 500 tons." Qi Liren, director of the R&D center of the factory, said that the daily handling capacity can exceed 800 tons at the peak before the Spring Festival. After the completion of all sewage interceptors in the city, even if the total amount of sludge continues to increase, the treatment capacity of the plant can meet the demand.
Sludge can be made into fuel, plate, etc
In the past, it was too late to talk about sludge, but today how to "waste for treasure"?
"Sludge is difficult to treat, because its water content is more than 80%." Qi Jihong told reporters that the water content of the sludge from the sewage treatment plant was compressed to 80% after one treatment. At this time, the sludge appears to be in a semi fluid state. If it is difficult to press water again just by machine, secondary treatment is required. "We added a dehydrating agent to modify the sludge, reduce it to a fluid state, and then carry out mechanical dehydration." Qi Jihong said, reducing the water content of the sludge to 40%, and then recycling.
Qi Jihong made a settlement for the reporter. 1000 tons of sludge with a moisture content of 80%, after modified dehydration, the sludge is 330 tons with a moisture content of 40%. "With our treatment method, the sludge can be reduced by 65% in weight and 75% in volume." Qi Jihong said that sludge can also become a variety of "treasures". In front of the reporter, Qi Jihong took out a plastic grain the size of a rice grain. "This is the engineering plastic granules produced from sludge." Qi Jihong said that the sludge with a moisture content of 40% was crushed and dried into ultra-fine powder with a moisture content of less than 1% as a plastic modification filler, and then the engineering plastic modification technology was used to modify the sludge powder. Under the condition of improving the compatibility and fluidity of sludge powder and plastic, Engineering plastic granules are made by mixing sludge powder and plastic.
At present, engineering plastic granules can be used to produce various plates, sheets and pipes, and the products can be used in industry, construction, decoration industry, municipal engineering, etc. In addition to making engineering plastic granules, sludge is also used for urban landscaping, biomass liquid fuel and other useful products.
Visit Huangjiang Sludge Treatment Plant in advance. From the gate of the plant, you can see the closed transport vehicles carrying sludge back to the plant from all places.
The transport vehicle first stops at the unloading area. The unloading area is divided into three ports, and the transport vehicle will discharge the sludge to the designated unloading port according to the classification of the sludge transported by the sewage treatment plant. "We have classified the sludge of 38 sewage treatment plants in advance, and we have divided them into those with excessive heavy metal content and those with the same and similar components." Qi Jihong said that if the heavy metal content exceeds the standard, report it to the environmental protection department for treatment according to the hazardous waste standard.
The sludge whose heavy metal content meets the standard is still in semi fluid state. Through the discharge port and rolling belt, it enters the sludge squeezing dehydration workshop. Here, the sludge enters the reactor, and the modifier is added at the same time. A 5-minute stirring reaction is carried out in the reactor. The sludge coming out of the reactor becomes fluid, and looks like wet sticky cement. Then, it enters the extrusion dehydrator for mechanical dehydration, which takes 40 minutes.
After 40 minutes, from Sludge dewatering machine The moisture content of the sludge is reduced from 80% to less than 40%. Then, the sludge came to the solar drying workshop. After the modified and dehydrated sludge was stabilized and dried by solar energy for 24 hours, its moisture content was reduced to less than 30% and sent to the pulverizing workshop for pulverizing.
Sludge can be transformed into engineering plastic particles, plates, sheets, pipes, etc.
Zhejiang Zhengda Environmental Protection Equipment Co., Ltd.: focusing on Horizontal spiral sedimentation centrifuge, sludge dewatering machine, sludge treatment equipment, centrifugal dewatering machine, sludge dewatering equipment, solid-liquid separation equipment, horizontal spiral centrifuge, centrifuge, mud dewatering machine, mud dewatering equipment, mud treatment equipment, horizontal centrifuge, solid-liquid separator Production, sales and service of various solid-liquid separation equipment. Welcome new and old customers to come for consultation and investigation.
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