This environmentally friendly brick
is made of ceramic sludge, printing and dyeing sludge, and papermaking sludge through more than 30 hours of drying and sintering according to a certain share. You listen, the sound is crisp. "The person in charge of the" Guangzhou Solid Waste Disposal and Recycling Center "introduced the red brick in his hand to the reporter.
There are countless such bricks in the large and bright hall of the "center", and they are stacked neatly in all corners. But what is unexpected is that these squarely solid bricks may have been just a pile of mud on the construction site a few days ago, or silt with bubbles in rivers and streams.
The main material of the "center" environmentally friendly sintered brick is the sludge that occurs during ceramic polishing, and its content accounts for 40% of the original guess. Other materials include construction sludge, municipal sludge, river banks, river channels, lake sludge, printing and dyeing sludge, papermaking sludge, and so on. These may be considered "sludge" and "waste" by many people. But when they arrived at the "center", fate began to pick up.
These materials come to the "center". In the future, the staff must first measure and proportion according to a certain share; then they are destroyed and mixed to allow them to be fully mixed together; the mixed materials are sent to the kneading machine for extrusion. The bricks are formed and then cut into the same size as the construction bricks; the cut bricks are mechanically gathered and piled up in a local place for roughing, boring, and then sent to a sintering kiln for sintering. The process from boring to firing takes about 30 hours. Through these processes, ceramic sludge and industrial sludge, which were originally dirty and smelly, have changed and become indispensable materials for the construction industry.
It is worth mentioning that as long as the fuel used in the sintering kiln is organic sludge (such as printing and dyeing sludge, papermaking sludge, etc.), biodiesel will increase when the material is lacking. These biodiesel is mainly extracted from trench oil Made. The whole project can be said to give full play to the value of waste.
Waste residues make use of waste heat
Ceramic scraps and construction waste, in our impression, these things have little value in addition to being used for filling pits and paving. However, in the "central" workshop, their value is more than that.
In the "burn-free" brick workshop in the "center", the reporter saw that ceramic scraps, construction waste, metal training dust, kiln waste slag and other materials are being thrown into the destruction machine for destruction. ratio. After the destruction, the materials are mixed, and then the molding is restricted and cut into blocks according to a certain size. Finally, it is put into a maintenance kiln for boring and maintenance. Throughout the production process, the first added material is cement, and the intention is to let the material condense.
According to on-site technicians, both sintered bricks and non-fired bricks can be used in construction, such as sidewalks, fences, flower gardens, etc., and their performance is not much different from ordinary construction bricks. The reporter picked up a few sintered bricks and non-fired bricks on the spot and weighed them. Their weight is slightly heavier than normal, and the density is relatively large. It is very hard to knock the bricks apart.
"Guangzhou Solid Waste Disposal and Recycling Center" is a project introduced in Baiyun District for the treatment of ceramic sludge in Taihe Town. The first phase of the project officially started operation in September this year. Half of the sludge waste can be disposed of here. From the materials provided by the center, it can be seen that in the first phase of the project, it will be able to produce 120 million environmentally friendly sintered bricks each year and treat municipal sludge, printing and dyeing sludge, papermaking sludge, food sludge, 1.3 million tons of food residues, etc. Annually treat 250,000 tons of non-water-containing ceramic polishing slag, sediment from waterworks, construction of residual mud, river surge, river course, lake silt, etc. The non-fired brick project can produce 45 million pieces of environmentally friendly non-fired bricks each year. Annually, it uses 135,000 tons of non-water-containing ceramic scraps, construction waste, metal training dust, waste incineration ash, boiler, kiln waste, etc.
"Now our sewage treatment plant is planning to treat 30,000 tons of sewage a day. If it is operated at full capacity, about 20 tons of sludge will occur every day. In the future, this center will not only be able to handle the waste from ceramic enterprises, but also effectively The sludge of the sewage treatment plant will be disposed of and energy conservation and emission reduction will be completed. "With the pressure of emission reduction intensifying, the intention to put into production and operation will undoubtedly be welcomed by the Baiyun District as well.
Tackling both symptoms and causes, energy saving and emission reduction are effective
High scientific and technological content, good economic benefits, low resource consumption, less environmental pollution, and full use of human resources advantages, this is the long-standing industrialization road of the Baiyun District District Party Committee and District Government. Therefore, when introducing the ceramic sludge waste disposal project to deal with the shackles of the sustainable development of the ceramic industry, it also actively encouraged and supported ceramic enterprises to work hard on technological innovation, energy saving and cost reduction, in order to complete the reduction of energy consumption, intensive produce.
In Bangmin's polishing workshop, the sludge residues from the polishing followed the flowing water all the way to the sedimentation pond. After passing through the small sedimentation ponds, the muddy muddy water became very clear. The sludge deposited on the bottom of the pond is pumped up by the machine. After the dewatering process, it is transported back to the workshop and used from scratch. Part of it is used for the production of polished tiles, part of it is continuously added to the production of ceramics, and clean water is continuously reused. On the other hand, since 2011, the Baiyun District District Party Committee and District Government have repeatedly arranged the government, district publicity department, court, procuratorate, public security branch, city supervision bureau, legal system bureau, letters and visits bureau, emergency office and other districts directly to ceramic materials. Processing plants and other companies carry out iron fist improvement. Shock illegal excavation and investigation of illegal land use; conduct comprehensive inspections, investigations, and reorganizations of all mines, ceramics sites, illegal land use, random piles, and deterrents in the jurisdiction; conduct re-cultivation and greening of farmland, and unify the accumulation of ceramic materials Field, crushing plant, processing plant, etc. These actions not only standardize the production order of ceramic enterprises, but also further improve the air quality in Guangzhou.