The production process of ammonium metatungstate requires a series of environmental protection technologies to ensure the environmental friendliness and sustainability of the production activities. The following is a detailed analysis of the environmental protection technologies required for the production process of ammonium metatungstate:
Exhaust gas treatment technology
Condensation-absorption treatment
Ammonia in the exhaust gas can be treated by condensation-absorption, e.g. using hydrochloric acid and ammonium chloride to circulate and absorb the ammonia, obtaining an absorbent solution with a high ammonia content and ammonia-containing condensate.
Emission control
Ensure that the waste gas emission meets the national and local emission standards, and the real-time monitoring of the waste gas emission can be done by setting up emission outlets and emission monitoring equipment.
Wastewater treatment technology
Neutralization and precipitation method
Use alkaline substances such as sodium hydroxide, lime, etc. to neutralize the acidic substances in the wastewater, so that heavy metal ions form insoluble precipitates, and then purify the wastewater.
Evaporation and crystallization method
Especially suitable for treating wastewater from APT (ammonium paratungstate) production, solutes in the wastewater are precipitated out in the form of crystals by evaporation and crystallization, thus realizing the purification and recovery of wastewater.
Solid Waste Treatment Technology
Reduction
Reduce the amount of solid waste generated by optimizing production processes and equipment. For example, adopting advanced production processes and equipment to reduce the consumption of raw materials and the generation of waste residue.
Resourcing
Recycle and reuse recyclable solid wastes, such as waste metals and waste plastics.
Harmless treatment
For solid wastes that cannot be recycled, carry out harmless treatment, such as incineration, landfill, curing, etc. The incinerator needs to be equipped with a tail gas treatment system to ensure that the gas emitted meets environmental standards.
Green Technology
Ion exchange method
Ion exchange resin is used to separate and purify tungsten-containing solution to obtain high-purity ammonium metatungstate. This method has the advantages of environmental protection and energy saving, but the cost of resin regeneration and waste liquid treatment is high.
Solvent extraction method
Use organic solvent to extract the tungsten-containing solution to realize the separation and purification of tungsten. This method has the advantages of good separation effect and easy operation, but the use and recovery of organic solvents are difficult.
Technological Innovation and Improvement Trend
High-efficiency energy-saving technology
Aiming at the problem of high energy consumption of traditional production process, research on high efficiency and energy saving technology, such as improving the reaction conditions, optimizing the process flow.
High-purity product preparation technology
In order to meet the demand for high-purity ammonium metatungstate in high-end application fields, develop high-purity product preparation technologies, such as ion exchange method and solvent extraction method.
Management and Supervision
Establish a sound solid waste management system and clarify the responsibilities and requirements of each link of waste generation, collection, treatment and disposal. Strengthen the supervision and inspection of solid waste disposal to ensure that the waste is properly handled and meets the requirements of environmental protection.
The production process of ammonium metatungstate requires the adoption of a variety of environmental protection technologies, including waste gas treatment technology, waste water treatment technology, solid waste treatment technology, green environmental protection technology, and technological innovation and improvement trends. The application of these technologies aims to reduce the emission of pollutants, improve the utilization rate of resources, and reduce energy consumption and costs, thus realizing the greening and sustainable development of ammonium metatungstate production.
More details of ammonium metatungstate product, please visit website: http://ammonium-metatungstate.com/
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