Put green into every detail --- Documentary on environmental protection in Tianjin Soda Plant

As the cradle of China's soda manufacturing industry and the Tianjin Soda Plant, which has two “China Top Brand Products” titles, it has always been “creating green ammonia base” as the basis for establishing a factory and implementing it in every detail of the company’s development. After years of hard work, the plant has achieved remarkable results in terms of the recycling of "three wastes", as well as optimizing the environment, saving resources, and implementing cleaner production.

During the “10th Five-Year Plan” period, the Tianjin Soda Plant invested a total of 90 million yuan, built a series of advanced pollution control projects, achieved the goal of reducing pollution and recycling waste, and completed the dust pollution control of the top of the lime kiln kiln, building 7 towers. Four sets of dust treatment system of the lime kiln, and the recovered dust is all reused. This project has become a model project of the soda industry, and the treatment technology has obtained national patents; the #4 high-pressure boiler ammonia desulphurization device has been constructed, and the environmental protection special acceptance has passed. It is the largest in China, and it is the first time in China that the by-products of ammonia desulfurization are processed into agricultural ammonium sulfate fertilizers that meet national standards.

Tianjin Soda Plant adhered to technological innovation as its leader in environmental protection work, and took the lead in adopting new bag filter in the same industry to achieve dry treatment of ammonium chloride dust pollution, improved treatment efficiency, and low exhaust dust concentration. , And can directly recover materials for the company to increase efficiency, this project won the Soda Industry Association scientific and technological progress second prize; use of PPDC type air box pulse bag filter replaces the original dust collector, to complete the baking soot dust renovation project, improve the dust removal efficiency The calciner furnace gas entrains about 13g/Ndm3 of soda ash before it enters the furnace gas scrubber, causing a lot of waste. The plant uses electrostatic precipitator to dry the gas from the four kiln furnaces for total dry recovery. Changed the traditional soda ash furnace gas dust treatment method; completed the transformation of the compressed oil-water separator, and adopted the air flotation oil recovery system with advanced treatment technology and high treatment efficiency, wastewater discharge standards, waste oil recovery; investment over 15 million Yuan completed the carbon black wastewater treatment and reuse project, and processed the carbon black wastewater through equipment such as pressure filtration. The separated carbon black was sold as a product, and the clear liquid was reused to realize the environment. Benefits, economic benefits double harvest.

In terms of resource conservation and comprehensive utilization, Tianjin Soda Plant aims to use green ammonia as its base to re-allocate the waste of the soda process and reduce the environmental impact of the soda production process. The limestone calcining process at the Tianjin Soda Plant produces about 80,000 tons of waste sand every year, and high-pressure boilers need to add about 10% of a certain size of limestone to reduce the melting point of the ash. Through perfecting the control process of boilers with burning and returning sand, the plant has completely realized the complete blending of waste sands; the 2500m3/h seawater circulating water plant built by the company has a high salt content after seawater enrichment. Salts are used to reduce the salt consumption of soda ash production, and at the same time achieve the purpose of saving fresh water resources and reducing pollution emissions. The industrial boilers of enterprises produce a large amount of slag and fly ash each year, which occupies land and are easy to generate dust pollution. In March 2003, Tianjin Soda Plant cooperated with RISTARDA to use fly ash as raw material for building materials, and annual production of 400,000 cubic meters of building block bricks, which realized the comprehensive utilization of fly ash; the use of soda ash production process emissions Carbon dioxide-containing gas produces liquid edible carbon dioxide, which has become a supplier of Coca-Cola and Pepsi, and has occupied a high-end market. It also uses waste mother liquor produced during the production of heavy soda ash to produce sodium sulfite products. It not only comprehensively uses the waste liquid from the outside, but also reduces the pollution. It also has great economic benefits.

In order to beautify the surrounding environment of the plant, Tianjin Soda Plant, together with the National Environmental Protection Agency, the Ministry of Construction, Tianjin University, etc., conducted in-depth research and technical research on the soil engineering technology for soda slag. It not only completed the treatment of the old soda slag mountain, but also In 2002, on the basis of the original soda ash mountain, the company built a 330,000-square-meter Ziyun Park with beautiful mountains, flowers, and greenery. It became the only environmentally friendly park in the world to use industrial waste.

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