Contact Section -
Catalysts
- Nanjing Yungao
January 29, 2018
Introduction
Nanjing Yungao New-Type-Material Co., Ltd.
belongs to Nanjing Yun Tai Shan Group that has operated a 200 kt/a
sulphuric acid plant since the 1990's. With technology
innovation and nearly 30 years of sulphuric acid manufacture experience,
Yungao is devoted to provide excellent catalysts and solutions to help
sulphuric acid plants to reduce the emission and improve their
production capacity. The catalysts for SO2 oxidation
produced by Yungao have been used in over 200 plants, including a 800
kt/a metallurgical sulphuric acid at a copper smelter in China.
Nanjing YungaoCatalyst Types
| |
S101 |
S108 |
S112 |
SG101 |
| Characteristic |
Moderate Temperature |
Low Temperature |
Caesium |
Improved Vanadium |
| Application |
All Beds |
Bed 1
ignition Layer
Bed 3
Bed 4 after Inter Absorber |
Bed 1
ignition Layer
Bed 4 after Inter Absorber |
|
Article
New technology flourishing, sulfuric
acid industry has emboldened emission reduction
In the sulfuric acid industry in 2014
annual meeting, sulfuric acid catalyst, tail gas treatment, energy
saving technology, acid cleaning and sewage treatment and other
technical topics are the most popular. Reporter noted that, whether the
enthusiasm of enterprises to promote new technologies, new products, or
experts calm analysis of industry trends and trends, all involving
energy-saving emission reduction and cleaner production.
China Sulfuric Acid Industry Association vice president Wu Xuemei
introduction, technological innovation is the focus of the annual
meeting, through the exchange of technical experience, concerned about
the results of new technologies to help enterprises pulse technology
trends, promote cleaner production and sustainable development.
Catalyst: to achieve new breakthroughs
The catalyst is the core of sulfuric acid production, which is
directly related to the conversion of sulfur dioxide and exhaust
emissions. Kaifeng Mitutoyo Catalyst Co., Ltd. and Henan University,
Zhengzhou University, a joint research and development of vanadium
catalyst, the innovative use of microwave drying, intermediate frequency
calcination process, to achieve continuous drying and calcination
production, improved drying efficiency and catalytic activity, So that
sulfuric acid production conversion rate increased significantly reduced
emissions. This product is used by Guangxi Daxin Guinan Chemical Co.,
Ltd., Jiangsu Lvling Chemical Co., Ltd., Shandong Heavy Oil Chemical
Co., Ltd., Yingkou Shenghai Chemical Co., Ltd. and Shandong Mingrui
Chemical Industry Group Co., Ltd., etc. and received good results.
"In October 2012, we started to use this vanadium catalyst in the
200,000 t / y sulfur-based sulfuric acid plant, which has been used for
18 months. The effect is very obvious. The sulfur dioxide conversion
rate is 99.9%, two to three The average content of sulfur dioxide in the
tail gas is only 288 mg / cubic meter, far less than the original 1000
mg / cubic meter. The original catalyst is replaced every year, now see
an estimated 2 to 3 years replacement time no problem. "Guangxi Dahui
South Chemical Co., Ltd. chief engineer Guo Hongbin pleased to China
Chemical Industry News reporter, said the company was forced to exhaust
sulfur dioxide content is too high, decided to use the opportunity to
replace the catalyst overhaul, bold attempt to use Kaifeng Mitutoyo
catalyst.
In mid-May this year, Kaifeng Mitutoyo catalyst company has
independent intellectual property rights of vanadium catalyst
manufacturing method in Guangxi Dah Sing by the China Petrochemical
Federation of scientific and technological achievements appraisal,
reached the international advanced level.
Exhaust gas desulfurization: adapt to new standards
October 1, 2013, "sulfuric acid industrial pollutant discharge
standard" formally implemented, exhaust sulfur dioxide emission
concentration limit of 400 mg / cubic meter, sulfuric acid in key
control area enterprises to implement 200 mg / cubic meter of special
limits. The new standards prompted sulfuric acid enterprises to speed up
the technological transformation of tail gas treatment to achieve
discharge standards to meet the new situation of energy-saving emission
reduction.
Jinchuan Group Co., Ltd. smelting system supporting the construction
of seven sets of sulfuric acid plant. Due to smelting furnace and more
can not do with the sulfuric acid system, "one to one", resulting in
flue gas emissions and concentration fluctuations, resulting in exhaust
emissions can not be achieved. The company for this purpose sodium soda
acid desulfurization process, through the absorption of caustic soda to
achieve desulfurization. Jinchuan company chemical plant technical
director Jia Xiaojun introduction, operation practice results show that
the absorption of caustic soda with high efficiency, tail gas to adapt
to a large range of advantages. Currently Jinchuan company in its
530,000 tons, 300,000 tons, 480,000 tons, 700,000 tons of sulfuric acid
production systems for the application of sulfur dioxide in tail gas
content maintained at 100 to 200 mg / cubic meter.
Chengdu of the Environmental Protection Technology Co., Ltd. relying
on the National Flue Gas Desulfurization Engineering Technology Research
Center of technological superiority, research and development success of
new catalytic flue gas desulfurization technology. Different from the
traditional absorption method, the technology uses porous material as
carrier, catalyst is prepared by loading the active component,
adsorption, catalysis and regeneration are carried out in the same
device, and the sulfur dioxide in the flue gas is converted into
sulfuric acid, thus realizing the comprehensive utilization of
resources. At present, the desulfurization technology has been in the
Fuling, Yunfu Jintai Chemical, Sichuan Yingfeng sulfuric acid plant
chemical applications. In late May, the new catalytic sulfuric acid tail
gas treatment and resource utilization of scientific and technological
achievements by the China Petrochemical Federation organized the
technical appraisal, reached the international advanced level.
In addition, the Beijing University of Chemical Technology of the
Ministry of Education, High Gravity Engineering Research Center of the
high-gravity deep desulfurization technology, but also reached the
international advanced level of innovation.
Recycling Economy: Resource Reuse
The sulfuric acid production is exothermic and produces a large amount
of steam. In recent years, sulfuric acid enterprises focus on the
construction of circular economy, aimed at re-use of resources, a
substantial increase in energy-saving level, the use of low-temperature
waste heat recovery of 75% of total capacity, heat utilization rate of
60% to 90%, sulfuric acid recovery steam 1.6 to 1.7 Ton.
"I plant mineral sulfuric acid recycling economy standardization pilot
project, June 8 just passed the National Standardization Commission and
the National Development and Reform Commission Organization Examination
and acceptance, becoming the first in Zhejiang Province through the
standardization of circular economy pilot enterprises." Zhejiang Juhua
Co., Ltd. sulfuric acid Plant executive vice president Chen Li Jin told
the China Chemical Industry News reporter. Since May 2011, sulfuric acid
plant to circular economy standardization pilot as an opportunity to
explore and establish a standardized system of circular economy of
mineral sulfuric acid, organize the implementation of circular
economy-related standards, build circular economy standardized
information platform, and achieved remarkable results. 3 years to
establish a standard 579, involved in the development of national
standards 2, industry standard 1, the implementation of ultra-gravity
exhaust gas desulfurization technology, heat ladder recycling and other
large-scale technical transformation 4, annual COD5.12 tons, 345.6 tons
of sulfur dioxide, 7.6 tons of wastewater, an increase of 45.04 million
yuan of economic benefits.
Guizhou Wengfu Group Chemical Equipment Company, deputy general
manager of the Department of Energy Meitong You introduction, the
company 1.2 million tons / year of sulfuric acid produced entirely for
personal use, the sewage has reached zero emissions. Of which 200,000
tons / year sulfur acid last year on the new low-temperature waste heat
recovery device, and then in the 800,000 tons / year pyrite sulfuric
acid plant using self-developed phosphorus slurry washing
desulfurization treatment technology, is the construction and
installation, 7 Month put into operation exhaust gas sulfur dioxide
emissions concentration will reach 80 mg / cubic meter.
In the sulfuric acid industry, the annual meeting of the Nanjing Hai
Lu Energy Technology Co., Ltd. General Manager Yu Xiangdong introduced
the company's development and commitment to the implementation of
China's first set of pyrite sulfuric acid heat recovery device
operation. The device in Shandong Mingrui 120,000 tons / year pyrite
sulfuric acid production since the operation of low-temperature heat
recovery system is stable, direct production of 0.8MPa low-pressure
steam 5 to 7 tons / hour, heating desalination water and medium pressure
boiler feed water recovery Heat equivalent to 1.2 tons / hour of
low-pressure steam, the total heat recovery is equivalent to 6 to 8 tons
/ hour of low pressure steam, folding acid recycling steam rate of 0.4
to 0.53 tons / ton.
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