1. Outstanding achievements and constant praise
Wuxi Hudong Maester Environmental Engineering Co., Ltd., formerly known as Wuxi No.2 Construction Machinery Factory, is a professional manufacturer of chemical machinery in the Ministry of Chemical Industry. Wuxi Hudong Maester Environmental Engineering Co., Ltd. realized the importance of environmental protection for the sustainable development of the national economy earlier. With the country's emphasis on environmental protection, Wuxi Hudong Maester Environmental Engineering Co., Ltd. seized the opportunity and entered the field of environmental protection. As early as the end of 1981s, it invested millions of yuan to cooperate with foreign air flotation experts to research and develop super-efficient shallow air flotation water purifier. The first large-diameter (φ φ11m) super-efficient shallow air flotation water purifier in China was successfully developed by Wuxi Hudong Meister Environmental Engineering Co., Ltd. and put into the market first. The shallow air flotation equipment was first introduced in the printing and dyeing industry. Because the pollution of printing and dyeing industry is much bigger than that of general industry, there is a strong voice for environmental protection. The ultra-efficient shallow air flotation water purifier was put into industrial operation in 1992, and achieved good results in the treatment of printing and dyeing wastewater in Changshu Shuangmao Group, Jiangsu Province. Through the joint test of Jiangsu Environmental Monitoring Center, Jiangsu Environmental Monitoring Station, Shanghai Light Industry Design Institute, East China University of Science and Technology and Shanghai Environmental Technology Station, the authenticity and effectiveness of air flotation treatment of sewage were finally confirmed, which attracted widespread attention at home and abroad, and was praised by the leaders of the State Environmental Protection Administration as' the pride of national industry' at the national industrial wastewater treatment technology exchange meeting held in 194.
in p>1997, in the' Zero Action' of meeting the standards in Taihu Lake Basin and Yangtze River Basin, cqj super-efficient shallow air flotation water purifier of Wuxi Hudong Meister Environmental Engineering Co., Ltd. played an important role. Therefore, China Paper Association held a special seminar in Wuxi from March 5 to March 8, 1999 to promote cqj super-efficient shallow air flotation water purifier of Wuxi Hudong Meister Environmental Engineering Co., Ltd. Then, the Jiangsu provincial government held a working conference on the treatment of papermaking wastewater in the Yangtze River basin and six provinces and one city in East China on March 21-25, 1999. At the conference, cqj super-efficient shallow air flotation water purifier of Wuxi Hudong Master Environmental Engineering Co., Ltd. was introduced and promoted, and delegates were organized to visit the sewage treatment site of Taiwan Province Rongcheng Paper Co., Ltd. in Wuxi. Therefore, shallow air flotation technology has been rapidly popularized in the field of environmental protection.
cqj super-efficient shallow air flotation water purifier of Wuxi Hudong Meister Environmental Engineering Co., Ltd. was awarded as a national new product and high-tech product in 1998. At present, the ultra-efficient shallow air flotation water purifier sells well all over the country, especially in thousands of enterprises such as Guangzhou Paper Co., Ltd., Henan Luohe Yin Ge Paper, Shandong Linqing Yinhe Paper, Hunan Yueyang Paper, Hong Kong Liwen Paper, Zhongnan Company nine dragons paper, Taiwan Long Da Rongcheng Paper, Jinguang Group (app), Mudanjiang Hengfeng Paper, Jiaxing Minfeng Paper, Shandong Taiyang Paper, Shandong Chenming Paper, etc., which have been well used and generally praised. Some products have been exported abroad. At present, this product has become an ideal equipment for white water recovery and wastewater treatment in paper industry. However, Wuxi Hudong Meister Environmental Engineering Co., Ltd. is not satisfied with the status quo. Based on the purpose of "making continuous progress and striving to develop advanced environmental protection products suitable for China's national conditions for the benefit of future generations", it has invested a lot of manpower and material resources to conduct in-depth research and experiments, and has made many major improvements to the cqj super-efficient shallow air flotation water purifier, and has now developed the 6th and 7th generation ion air flotation products.
2. Insist on scientific and technological innovation and make a technological breakthrough
The principle of air flotation water purification is to introduce a large number of tiny bubbles into wastewater, and the bubbles adhere to the suspended matter through the action of surface tension, so that the overall density of the bubbles and suspended matter is less than 1, and float to the water surface under the action of buoyancy to realize solid-liquid separation, thus purifying the wastewater.
the traditional air flotation has low treatment capacity due to the defects in design and structure. The retention time of wastewater in air flotation is 41 ~ 61 min, and the equipment volume is very large, and the purification rate is very low.
The appearance of ultra-efficient shallow air flotation water purifier is a major breakthrough in air flotation water purifier technology. It changes static water inflow and dynamic water outflow into dynamic water inflow and static water outflow, and uses the principle of "zero speed" to make the flotation body float vertically to the water surface in a relatively static environment, and the floating distance is minimized, and it is not affected by the outflow velocity. The theoretical pool depth is only about 451 mm, the retention time of wastewater in air flotation is only about 3 ~ 5 min, and the equipment volume is greatly reduced. Coupled with the advantages of uniform bubble distribution, no bubble dead zone, and small disturbance of mud scraper to water body, the purification efficiency is greatly improved.
The successful development of p>CQJ super-efficient shallow ion air flotation water purifier is another major breakthrough in air flotation water purification technology, which has made a qualitative leap. On the basis of super-effective shallow air flotation, this product has made many major improvements, mainly using the patented products developed by the company-high-efficiency dissolved air device with special structure and high-efficiency integrated energy dissipation system, and the dissolved air rate reaches the theoretical maximum without concentration gradient.
CQJ super-efficient shallow ion air flotation water purifier not only removes 99.8% of suspended solids, but also has been personally sampled by famous water treatment experts from Shanghai design institute of light industry and tested by several authoritative institutions at the same time. The removal rate of dissolved CODCr is as high as 11% ~ 31%, and it has been evaluated as "ion air flotation with international leading level" by experts.
CQJ super-effect shallow ion air flotation water purifier has another great advantage: because the microbubbles are extremely small in diameter and extremely high in density, they can fully capture extremely fine suspended solids, and it is not necessary to condense them into large alum flowers in advance, so the dosage can be greatly reduced, and in some cases, it can even be operated without drugs, thus greatly reducing the operating cost. In biochemical treatment, dissolved oxygen can be rapidly increased.
3. Challenge the traditional theory to win the world's difficult problem
In the research of releaser, Wuxi Hudong Meister Environmental Engineering Co., Ltd. first broke the international traditional theory of manufacturing releaser. According to the traditional theory, the releaser is a decompression device. As long as the dissolved gas water is suddenly decompressed, microbubbles can be released. The greater the pressure difference, the smaller the microbubbles will be released. But research shows that this understanding is far from enough!
in fact, complete energy dissipation is very important for the release of dissolved gas, which is just ignored by traditional theory. At present, all kinds of releasers in the world have failed to completely dissipate energy, the outlet velocity is quite high, and the dissolved gas release environment is disturbed severely. Wuxi Hudong Meister Environmental Engineering Co., Ltd. has successfully developed an "efficient integrated energy dissipation system" after a long period of research and repeated experiments, which has solved the above problems well. The 6th generation CQJ series super-efficient shallow air flotation water purifier of Wuxi Hudong Meister Environmental Engineering Co., Ltd. has achieved ideal results after adopting this "integrated energy dissipation system" to replace the traditional releaser. After testing, the average diameter of the released microbubbles is only 1 ~ 7 μ m, and it is very uniform. According to the data, the microbubbles released at present in the world are generally between 51 and 111 μ m. That is to say, with this improvement, the number or density of bubbles is increased by at least 8111 times, and the total area of bubbles is increased by at least 411 times under the condition of equal dissolved gas!
In addition, the scientific and technical personnel of Wuxi Hudong Meister Environmental Engineering Co., Ltd. have successfully developed a new type of dissolved gas pipe with unique structure through the research of various existing dissolved gas devices, which completely overcomes the defects of various existing dissolved gas devices in the world, and can make the dissolved gas concentration of dissolved gas water reach the theoretical maximum in only 3 s, greatly improving the dissolved gas efficiency, and making air dissolve into water almost without diffusion process, thus accelerating the dissolution of air molecules, completely eliminating the concentration gradient, and.
the key of super-effect shallow air flotation with high efficiency lies in the "zero velocity principle". The 6th generation CQJ series ultra-efficient shallow air flotation water purifier of Wuxi Hudong Meister Environmental Engineering Co., Ltd. has really achieved "zero speed", so its treatment capacity is also the largest among the products of the same type and specification.
in a word, the 6th generation CQJ series ultra-effective shallow air flotation water purifier of Wuxi Hudong Meister Environmental Engineering Co., Ltd., because of its original proprietary technology, compared with similar products in the world, the air dissolving efficiency is improved by nearly 1 times under the same reflux ratio, and the number or density of bubbles and the total area of bubbles are greatly improved.
4. Overcoming the technical bottleneck, focusing on deinking wastewater
The advent of the 7th generation air flotation product has gone through the arduous process of denial, doubt, affirmation and approval. The new system took the lead in breaking through the technical bottleneck in the world and entered the white water recovery system and the CODCr decolorization project of pulping wastewater.
The 7th-generation air flotation products can effectively solve a series of problems in white water recovery, especially in household paper, such as pulp can't be reused, high water viscosity, poor drainage performance and high operating cost, which have long plagued the paper industry without adding any chemicals, and have caused great sensation in the industry, and successfully run in Japanese Prince, Taiwan Province Yongfengyu, Smick, German DE Company, American Qianli, Indonesian Jinguang and other enterprises. Small investment and big return have become a reality, and the quality of paper has been improved, which has been affirmed by customers.
The 7th generation air flotation products have also shown efficient decolorization effect in the field of advanced treatment of pulp intermediate water, further reduced CODCr, rapidly increased dissolved oxygen, and greatly improved biochemical efficiency. They have been successfully applied to advanced treatment of pulp intermediate water in dozens of pulp enterprises, and have been affirmed by customers.
due to the improvement of pulping and papermaking machinery, technical progress and the improvement of water circulation efficiency, the water consumption per ton of paper is greatly reduced; Under the premise that the total amount of pollutants has not changed greatly, the wastewater load, pollutant concentration and water temperature have been greatly improved, and it is difficult to meet the requirements of environmental protection by precipitation and biochemical treatment of wastewater. The air flotation system of Wuxi Hudong Meister Environmental Engineering Co., Ltd. can greatly increase dissolved oxygen, which guarantees the improvement of biochemical efficiency.
In the treatment of waste paper deinking wastewater, the 7th generation air flotation products also made a major breakthrough. Because the deinking wastewater is alkaline and the temperature is high, the dosage of polyaluminum chloride (PAC) is large, and the dosage of hydrogen peroxide needs to be increased after the wastewater is reused, which increases the operating cost. The 7th generation air flotation products have solved this problem well. In practical application, it can achieve good results without adding or adding a small amount of polyacrylamide (PAM), improve the reuse quality of wastewater, and greatly reduce the operating cost, which has become the focus of deinking wastewater treatment in the paper industry. Dozens of enterprises such as Guangzhou Paper Group, Liwen Group, Jindaxing, Jiangxi Chenming, Wuhan Chenming, Shouguang Chenming, Jilin Paper, Sun Paper, Shixian Bailu, Fujian Nanzhi Co., Ltd. and Yuezhi Group have run well and won high praise from users.
The super-efficient shallow air flotation technology has been ahead of the international level, which has been fully affirmed by the industry. However, General Manager Lu Yinming said that Wuxi Hudong Meister Environmental Engineering Co., Ltd. will continue to increase investment, make efforts in research and development, and make contributions to wastewater treatment in the pulp and paper industry.
5 environmental protection costs are included in the cost to create a level playing field
When asked about the gap in environmental protection in the paper industry between China and developed countries in the world, Lu Yinming, the general manager, said frankly: "Personally, I think the gap in environmental protection is mainly an ideological gap, but as far as hardware technology is concerned, the gap is not big. In my opinion, quite a few enterprises still think that pollution control is a helpless move and an image project, with only social benefits and no economic benefits. Even with complete facilities, it is subjectively ignored, and reducing the operating cost will cause the sewage treatment system to fail to operate normally, or even steal sewage. In some places, protection causes unfair competition, which is also one of the reasons why environmental protection governance is considered to be a burden. If one day the cost of environmental protection governance is included in the product cost and there is fair competition, then no unit or individual will regard environmental protection governance as a burden, which is fair and reasonable. "