Blue charcoal wastewater resource utilization short-process treatment technology is leading in China

On December 8th, the short-process treatment technology of blue charcoal wastewater resource recycling developed by Jiangsu Wodeckai Environmental Protection Technology Co.
, Ltd.
passed the scientific and technological achievement appraisal
organized by the Shaanxi Petroleum and Chemical Industry Federation in Xi'an.
The appraisal committee, led by Professor Li Wenhong of the School of Chemical Engineering of Northwest University, believes that the technology ranks at the leading level in China and recommends accelerating the industrialization and application
.

Li Zuqiang, general manager of Wodecke Company, introduced that the technology consists of
three core processes: deamination, recombinant separation and separation, and advanced treatment.
The invention of "in-situ pH desamination" technology and a special negative pressure injection type ammonia deamination tower for high ammonia nitrogen wastewater, the ammonia nitrogen removal rate exceeds 99%.

And the membrane separation water advanced treatment technology is adopted, and the traditional biochemical treatment method
is no longer used.
The treated purified water not only meets or exceeds the coke quenching standard, but also separates and recovers pollutants such as ammonia nitrogen, tar, fly ash and complex organic matter in blue charcoal wastewater to obtain by-products
such as concentrated ammonia water and recombinant concentrates.
The high-efficiency and energy-saving recombinant sub-analysis technology and device have been developed, and the calorific value of the recovered recombinant sub-products is high, among which the recombinant sub-concentrate can be mixed with fly ash as fuel, which has utilization value and realizes resource utilization
.
At the same time, the operation of the plant only consumes steam and electricity, which has the characteristics of short process flow, low investment and operating costs, and less land occupation, and has significant social and economic benefits
.

In March 2022, Wodecke completed a 48-ton industrial demonstration plant for the recycling and recycling of blue charcoal wastewater per day in Yulin Northwest Chemical Co.
, Ltd.
, Shaanxi Province, to treat the blue charcoal wastewater
of the company's coking plant.
The results of the expert on-site assessment show that the device has achieved full load operation, the water production index has reached the design requirements, and the blue charcoal quenching index
has been met.
After third-party testing, the COD content of blue charcoal wastewater into the device was 30025mg/L, ammonia nitrogen 1830mg/L, volatile phenol 2399mg/L and petroleum 241.
5mg/L
.
After treatment, it was only 36.
25mg/L, ammonia nitrogen 9.
07mg/L, volatile phenol 6.
52mg/L, and petroleum 0.
26mg/L
, respectively.

It is understood that as a national high-tech enterprise focusing on high ammonia nitrogen, difficult industrial wastewater treatment and resource recycling, after years of cooperation with domestic universities and painstaking research, it has broken through key technologies such as efficient recycling of ammonia nitrogen, blocking and recycling of phenol in wastewater, and has obtained more than 40 patented technical achievements, which are widely used in coal chemical industry, metallurgy, rare earth, pharmaceutical, textile, new materials and other fields
.
Among them, through further technology integration, the "Blue Charcoal Wastewater Resource Recycling Short Process Treatment Technology"
was successfully developed.

Blue charcoal wastewater refers to the wastewater produced in the process of medium and low temperature dry distillation of coal, which mainly contains ammonia nitrogen, benzene series, phenols, polycyclic aromatic hydrocarbons and other refractory and highly toxic pollutants, with complex composition and difficult treatment
.
At present, the treatment of blue charcoal wastewater at home and abroad mainly adopts methods such as "physical and chemical treatment + biochemical treatment", and there are bottlenecks
such as difficult to completely eliminate pollution, large investment, and high operating costs.