Nanjing Dongda Energy is a high-tech enterprise in Jiangsu Province, which covers energy and power, environmental protection engineering and municipal engineering. It has Nanjing Dongda Energy Engineering Design Institute and Nanjing Dongda Suwei Energy and Environmental Protection Engineering Co., Ltd.
Nanjing Dongda Energy Engineering Design Institute
Dongda Energy Engineering Design Institute is a high-tech enterprise with the technical background of College of Energy and Environment of Southeast University. Founded in 2003, the registered capital of 10 million yuan, the Department in Nanjing, under the Xinjiang Branch, Suzhou Branch, Henan Branch, Nantong Branch and Shandong Branch.
Nanjing Dongda Suwei Energy Environmental Protection Engineering Co., Ltd.
On the basis of Nanjing Dongda Energy and Environmental Protection Technology Co., Ltd. in 2005, we introduced a professional energy/environmental protection engineering company established by the British Suwei Technology Co., Ltd. with a registered capital of 15.6 million US dollars.
The company has the power industry design, environmental engineering professional design qualifications, strong design force, design level among the advanced domestic. In flue gas treatment, water treatment, solid waste treatment, renewable energy development and utilization and control system, the company has a number of independent intellectual property rights technology and related products and complete sets of equipment, with equipment research and development, design and manufacturing capabilities.
Our technology research and Development Center - Southeast University Thermal Energy Institute "973" large unit flue gas desulfurization technology research and engineering undertaking unit, with flue gas desulfurization pilot plant and perfect testing equipment. The technology of dry, semi-dry and wet desulfurization has won the national patent and the certification of Jiangsu Science and Technology Bureau. After the FGD technical team of Southeast University joined the Nanjing Dongda Energy Engineering Design Institute Co., Ltd. with flue gas purification technology, it has undertaken more than 30 flue gas desulfurization projects, and achieved good economic and social benefits.

Professional technology:

Integrated technology of denitration, desulfurization and dust removal
Thematic series gypsum rain prevention and control measures
Main technology of desulfurization and denitrification

  The process uses cheap and easy-to-get limestone to make desulfurization absorption slurry, which is mixed with flue gas in the absorption tower. The SO2 in flue gas reacts with calcium carbonate in the slurry and the oxygen inflated into the slurry to remove it. The final reaction product is gypsum. After desulfurization, the flue gas is removed by demister, heated by GGH device and discharged into the chimney or directly through the wet chimney. The desulfurized gypsum slurry can be recovered after dehydration.
Dry process of bottom feed spouted circulating fluidized bed
The process is independently developed on the basis of the company's patented technology - circulating fluidized bed technology. Based on the principle of circulating fluidized bed, Ca (OH) 2 is obtained by dry digestion of limestone. Under humidifying conditions, the SO gas in flue gas is removed by desulfurization tower, and the desulfurization is carried out by bottom feeding of circulating materials, and the ash is discharged into the ash field. In the engineering process, the contact time between absorbent and sulphur in flue gas is greatly prolonged after repeated cycles, so as to achieve higher calcium utilization rate, higher desulfurization efficiency and Ca utilization ratio than the ordinary dry process, which has the advantages of low cost and simple process, and is suitable for the areas with water shortage and low desulfurization efficiency requirements, and has been successfully applied to large-scale projects. Process project.
For example, simplified bottom feeding spouted circulating fluidized bed dry process, the use of economically designed circulating fluidized bed dry desulfurization technology to reduce the cost and operation costs, known as a simple circulating fluidized bed dry process.
Simple limestone gypsum process
The traditional limestone-gypsum wet process and equipment are simplified with the independent intellectual property rights jet bubble absorption tower as the core technology. It has the characteristics of less investment, high efficiency of desulphurization and dust removal, small equipment size and low running cost.
On the basis of this process, adding sodium salt replacement regeneration device, it can be operated according to the double alkali method, which has the advantages of further optimizing the absorption system and solving the problem of pipeline blockage.
Ammonia ammonium sulphate process
In view of the large amount of waste ammonia water in the production process of power plants owned by petrochemical and chemical fertilizers enterprises, a wet ammonia-ammonium sulfide desulfurization process with its own characteristics has been developed according to the advanced ammonia process technology abroad. The ammonia escape rate has been strictly controlled by the combination of two towers and spraying technology, which not only has high desulfurization efficiency, but also can be recovered. The sale of ammonium sulfate products can produce better economic results.
SCR flue gas denitration technology
The Department has a mature flue gas denitrification - SCR (selective catalytic reduction) technology, which is an economical and practical NOx removal technology. The principle is that NH3 and urea [CO (NH2) 2] are used as reducing agents to atomize before being injected into the boiler or heat evaporation and atomization in the boiler. Ammonia or urea in the gas phase can be decomposed into free radicals NH3 and NH2 in an appropriate temperature range. Under certain temperature and oxygen conditions, the reaction of reductant with NOx is superior to other reactions, so it is a selective chemical process.
The technology is also the most widely used and the most effective flue gas denitration technology.

Desulphurization and denitration division business scope

 Smart Substation Technology
Power generation design department -- advantages in the field of thermal power plant design
Advantages of enterprises in the field of power transmission and transformation
Treatment technology of boiler make-up water (desalted water or pure water)
Biological carbon sewage treatment and reuse technology
A small sewage treatment technology combined with anaerobic, drop aeration and constructed wetland

Application of wet electrostatic precipitator technology in coal-fired power plants
Wet electrostatic precipitator technology