DKT Energy Technology
National High-Tech Enterprise; Sichuan Provincial Enterprise Technology Center; Class B Qualification For Chemical Engineering Design; Class A Qualification For Environmental Pollution Prevention And Control; Pressure Pipeline GC1 Design Qualification
Technology for Recovering and Treating Ammonia-Containing Tail Gas to Produce Concentrated Ammonia Solution
Release Date:
2021-12-21
Source:
In the production processes of the energy and chemical industries as well as the semiconductor sector, certain gas streams—such as blast furnace gas and off-gas from gallium nitride epitaxy—contain varying concentrations of ammonia, necessitating the recovery and treatment of this ammonia. In response to this technical need, Dakote has developed a highly efficient water-washing absorption technology for capturing ammonia from ammonia-containing off-gases to produce concentrated ammonium hydroxide. This technology has been successfully implemented in multiple projects across China, effectively addressing a range of challenges associated with conventional sulfuric acid scrubbing, including high sulfuric acid consumption, elevated operating costs, and difficulties in marketing the byproduct ammonium sulfate.
Technical Features and Advantages
µ Advanced and mature technology, with stable and reliable operation.
µ The water-washing ammonia-absorption process can be flexibly configured according to operating conditions, optimizing both capital investment and energy consumption.
µ The self-developed GXR high-efficiency absorption reactor features rapid mass-transfer rates and high purification efficiency.
µ Producing concentrated ammonia solution from ammonia-containing tail gas yields good economic benefits.
Application Fields
Recovery and utilization of ammonia from ammonia-containing tail gases, such as raw coal gas and exhaust gases from gallium nitride epitaxy processes.
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Sichuan DKT Energy Technology Co., Ltd. (A subsidiary of Hydrexia (China)) has established the Sichuan Provincial Enterprise Technology Center, the Chengdu Engineering Technology Research Center for Industrial Waste Gas Purification and Utilization, and the China Petroleum and Petrochemical Engineering Gas Separation and Purification Technology Center, and boasts a professional team with high-level innovative R&D capabilities. After more than ten years of continuous research, DKT has successfully developed 30 new adsorbent materials on its own, which are widely used in the petrochemical, natural gas chemical, coal chemical, fine chemical, steel, metallurgical, environmental protection, and new energy industries, thereby establishing a complete industrial chain spanning R&D, production, design, and application.
High-Efficiency Helium Purification and Crude Helium Recovery Technology
For many years, Dakote has been dedicated to the development and application of helium extraction technologies, providing turnkey systems for helium recovery projects that have operated efficiently, safely, and reliably to this day. Specifically targeting helium-bearing feed streams such as natural gas and boil-off gas (BOG), the company has independently developed a patented ambient-temperature separation process for producing high-purity helium. Compared with conventional cryogenic helium separation technology, this approach offers greater operational convenience and significantly reduced energy consumption.
Hydrogen Production Technology
Hydrogen, as the cleanest green fuel, was officially classified as an energy source by the National Energy Administration on April 10, 2020, heralding an explosive surge in demand for hydrogen energy.
In response to the compositional characteristics of syngas generated during the clean, fractionated utilization of modern coal chemical processes and the associated application requirements, a comprehensive integrated technology for syngas separation and purification has been successfully developed. This technology encompasses pre-treatment via temperature swing adsorption (TSA) for impurity removal, sulfur-tolerant wide-temperature shift conversion, organic sulfur hydrolysis, water scrubbing for ammonia removal, MDEA-based desulfurization and decarbonization, fine desulfurization and dechlorination, catalytic deoxygenation, acid-gas desulfurization and sulfur recovery, PSA-based hydrogen enrichment, PSA-based methane concentration, PSA-based CO concentration, and membrane separation. The technology has been successfully implemented in several large-scale coal chemical projects across China and has received unanimous praise from users.
Pressure Swing Adsorption and Membrane Separation Technologies for Hydrogen Purification
Hydrogen is an important green and clean energy source as well as a key chemical feedstock, and has already been widely applied in numerous fields.
Sichuan DKT Energy Technology Co., Ltd.( A subsidiary of Hydrexia (China))
Sichuan DKT Energy Technology Co., Ltd.
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(A subsidiary of Hydrexia (China))
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