Recycling of renewable resources can be done

Protecting the environment is a basic national policy and an unshirkable responsibility. Chenming Group's renewable resources are mainly wastewater, waste residue, and waste steam. At present, the company has basically implemented effective control over the “three wastes”. While the Yunsheng has great social benefits, the economic benefits have also become increasingly prominent.

Wastewater Recycling Resources: Reducing Production Costs, Protecting Water Resources Wastewater reclaimed resources mainly refer to the mid-stream wastewater discharge and the papermaking white water.

The treatment method adopted in the middle section of the water system is the activated sludge method, which processes the middle-stage wastewater from pulp and papermaking. The system successfully passed the environmental protection inspection organized by Shandong Provincial Environmental Protection Bureau on May 16, 1997. At present, the system processes 40,000 cubic meters of middle-stage wastewater daily, and the COD content of the main pollution index of the discharged wastewater is lower than 450mg/L, reaching the original country. Secondary emission standards. In particular, nitrogen, phosphorus, and other organic fertilizers were added to the middle-stage water treatment. After the waste water discharged to the ecological demonstration park in the northern part of Shouguang City, it played an important role in improving the soil quality of the saline-alkali soil and promoting the growth of the reed and arundo. Chenming Group's pollution control idea was identified as one of the four "ecological chains", namely, the papermaking effluent waste water - the urban sewage comprehensive treatment field - the ecological demonstration park watering reed-reeds recycling pulping. At present, this ecological chain has taken shape. In addition, the use of bacteria to decolorize the middle of the water test, the effect is very good. After decolorization, the chroma was 16 times, the COD was 100 mg/L, and the SS was less than 50 mg/L. It completely met the standard of water for papermaking production and provided the feasibility basis for the closed loop recycling of mid-stream wastewater.

For recovery of paper white water, Chenming Group has invested more than 1.3 million yuan in succession to complete white water recovery facilities. After drug separation, the white water layer, substances that are difficult to separate from water, float to the surface of the flotation tank, and collect via the scum. Collected and discharged, the cleanliness of the treated water is greatly improved. At present, the daily processing of white water is nearly 10 000 cubic meters and all of it is used for pulping. In addition, the condensate produced by the plate condenser in the evaporation section of the alkali recovery workshop is also a valuable resource. This part of the water is at a temperature of about 50°C and can be collected and sent to the pulping plant to save a lot of steam. cost. In 2000, according to the equivalent calculation of the standard coal, the value of steam saving was 5.3 million yuan. Evaporation of condensate water is used to dissolve green liquor and wash causticized white mud. The temperature is about 80°C. In 2000, it saved 2.3 million yuan, which saves a lot of steam and saves water resources, and at the same time reduces the water load in the middle section.

Waste Residue Recycling Resources: Injecting Technology to Turn Waste into Bao Chenming Group has four main types of waste slag recycling resources: mid-water activated sludge, thermal power plant fly ash, alkali recovery white mud, and preparation dust removal.

Activated sludge is the waste residue produced in the mid-stage cement hydraulic section. The sludge contains rich organic fertilizer components. The company cooperated with the Institute of Ecology of the Chinese Academy of Environmental Sciences to carry out deep processing and development of activated sludge and developed a new type of microecological fertilizer. The eco-fertilizer has the characteristics of low cost and significant fertilizer effect, and is suitable for green agricultural production. It not only avoids secondary pollution but also improves soil.

Fly ash is an attached species produced by Chenming Thermal Power Plant during operation. It is generally buried and buried. After the power plant was put into operation in 2001, it will produce 300 tons of fly ash per day. The company organizes technical personnel to actively tackle the problem, and repeatedly debugs, using advanced technology to develop a block brick, with the next step in the construction industry policy adjustment, the block will be There is a wider range of application prospects.

Alkaline recovery of white mud is the residue produced during the production of sodium hydroxide in the caustic section of the alkali recovery plant. The main component is calcium carbonate. Alkaline recovery of white mud is mostly used for landfill pits, and it is sometimes used for road repairs. In 2001, the company increased its efforts to treat white mud, and developed ecological fertilizers using white mud and acid-eluting lignin.

The main components of dust preparation are fine wheatgrass dust and dust. At present, the pulping workshop produces 4340 tons of dust every year. It sells it to neighboring farmers on a contracted basis, which is used as a base for orchards and fields, and for the cultivation of edible fungus and Carrier culture bacteria.

Waste gas renewable resources: Relying on advanced equipment, minimizing the loss of steam resources With regard to the recycling of waste gas recycling resources, Chenming Group has invested 700,000 yuan in 1988 and installed 3 sets of steaming waste in the pulping workshop. The steam and waste heat recovery device adopts a more advanced jet condensing device for cooling, recovers the waste steam from the cooking and discharging system for heating waste water and hot water, and the recycling efficiency reaches over 70%, and the use effect is good.

One of the two issues that need to be noted in the recycling of renewable resources is that it should vigorously promote the implementation of low-cost, no-cost recovery programs, and ensure that the benefits of the output are greater than the input of the recycling process. Second, in the process of deep processing of renewable resources, secondary pollution should be avoided.

As a cause of Lizer’s future, environmental protection work is increasingly attracting people’s attention. Chenming Paper, with its strong sense of responsibility and deep green complex, has achieved a win-win result for both economic and social benefits. It has come up with a brand new environment-friendly road for China's paper industry. A green Chenming is increasingly showing itself clearly. In front of the world.

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