Thoughts on the choice of desulfurization technology triggered by the implementation of the new solid waste law

The new solid waste law improves the industrial solid waste pollution prevention and control system. It is clear that the polluter is responsible, and the waste-producing unit must perform the environmental pollution prevention and control responsibility system for the entire process of industrial solid waste generation, collection, storage, transportation, utilization, and disposal.

The new solid waste law also clarifies that the prevention and control of environmental pollution by solid waste adhere to the principles of reduction, recycling and harmlessness. Increase the regulations on clean production audits conducted by waste-producing units, encourage enterprises to adopt advanced production techniques and equipment, and reduce the amount and hazards of solid waste generated from the source.

Under the background of industrial ultra-low emissions, the implementation of the new solid waste law has undoubtedly raised requirements for environmental protection technology. There are many existing flue gas desulfurization technologies that are mature and stable, but most of the by-products generated after desulfurization are low or unable to be recycled. Recycling has formed an accumulation of industrial solid waste.

For example, in the limestone-gypsum method of wet desulfurization, the by-product of desulfurization is gypsum, and the output of gypsum after desulfurization is excessive. If it is not comprehensively used, it will cause secondary pollution to the environment. Desulfurized gypsum can be used as a cement retarder, but the blending amount is only 3% to 5%, and it can also be used for the manufacture of gypsum board. However, there are few successful applications, and most of them are stacked. In short, the utilization rate is low. The difficulty in handling is the current status of desulfurized gypsum. The implementation of the new solid waste law has increased the requirements for solid waste treatment in enterprises. When choosing a flue gas treatment process, no secondary pollution and no solid waste output should be the primary considerations.

Compared with the disadvantages of the limestone-gypsum method, the ammonia process in wet desulfurization can perfectly avoid these problems. Ammonia desulfurization produces no waste water and the by-product is ammonium sulfate particles, which can be used to process chemical fertilizers, organic fertilizers, etc. Organic compound fertilizer. Ammonium sulfate particles can be sold directly to chemical companies without the problem of stacking treatment, which solves the difficult problem of desulfurization and solid waste treatment. In this field, Mingsheng Environmental has gone through six generations of technology research and development, and successful business cases have been distributed all over the country.

There is a close relationship between the control of gas, water, and solid waste. The improvement of the new laws and regulations has given us the enlightenment: any field of environmental governance should be based on the basic principles of "sustainable development" and "green cycle". Pollution control should not address the symptoms but not the root cause. Environmental protection companies should in-depth research and development of new technologies to continue to contribute to the harmonious development of ecology.