Technological Upgrading Of Xinji Leather Industry Makes Backward Production Capacity "Turn Waste Into Treasure"

August 26, 2010 to curry leather Among the eight Hebei enterprises that have eliminated backward production capacity, the "bull's-eye" is "drum". Nowadays, most enterprises have eliminated the old drum and purchased the new drum with advanced technology Xinji Hebei Dongming Industrial Group Co., Ltd. (hereinafter referred to as Dongming company), which ranks among the top in leather industry, has fought a "renovation battle" relying on technological innovation eliminate The 18 drums were upgraded to & lsquo; New drum;, Let it & lsquo; Turn waste into treasure On August 23, Gao Yuchun, deputy director of Xinji Industry Promotion Bureau, told reporters.

In the past, in the preparation process of cattle hide tanning, cattle hair was burned and discharged along with the wastewater, which became an important factor for the high COD concentration. Now the wool protection method is used to filter out the cow hair completely and become the raw material for the production of organic nitrogen fertilizer and nitrogen-based acid; In the past, chrome liquor produced in leather tanning process was a heavy pollution source, and how to control it was a big problem& mdash; All the problems can be solved by the new process of overload drum hair protection depilation and the recycling of Liming and chrome tanning wastewater“ sewage Here we are just & lsquo; Passers by;, The Liming wastewater and chrome tanning waste liquid produced in the tanning workshop are collected by special pipes for solid-liquid separation, sedimentation treatment and test proportion, and then recycled. This is our company's first domestic source control tannery wastewater discharge new technology. " Dongming company general manager Xie Shenghu said.

It is understood that as early as 2006, Dongming company hired Shaanxi science and technology Wei Shilin and Liu Zhenhua, university professors and well-known domestic leather experts, led the technical research and development, and invested 2 million yuan of special research and development funds, and carried out independent innovation on the basis of digesting and absorbing domestic and foreign leather making clean technology and waste water treatment technology. After hundreds of experiments, 135 technical problems, such as chemical screening and its application method, operation of overload drum, recycling and treatment of wastewater, have been overcome, and the system technology integration of overload drum hair protection unhairing method and recycling of Liming wastewater and chrome tanning waste liquid has been formed. In order to promote energy conservation and emission reduction, Xinji city has promoted the technology in the city's tanning enterprises. At present, 14 tannery enterprises have used the technology.

According to the person in charge of the Management Committee of Xinji tanning Industrial Zone, they supervised the enterprises to carry out the project of "separate discharge" of tannery wastewater and chromium liquid, and realized the "separate storage of the enterprise, transportation of the sewage treatment plant and centralized treatment" of the chromium solution. At the same time, new technologies and new equipment, such as recycling of chrome liquor and alkali liquor, ash free expansion and water-saving drum, will be vigorously promoted in enterprises, which will save more than 1 / 3 of water consumption in tannery, reduce 80% of tannery sludge and 70% of discharge of chromium and alkali liquor. In particular, the tannery wastewater recycling technology project developed by Dongming group has won the first prize of national energy conservation and emission reduction. By guiding enterprises to adopt chrome free tanning, chrome free tanned leather has accounted for more than 70% of the total amount, becoming a real "green leather".

Just as Dongming company can actively innovate and set an example of turning backward production capacity into treasure, Xinji tanning district has become the first-class leather industrial park in China.