The water washing-distillation technology for ammonia-containing waste gas recovery: After the ammonia-containing waste gas is filtered and pre-cooled, it enters a multi-stage countercurrent water absorption system to obtain 18% to 22% concentrated ammonia water; the ammonia water is sent to the distillation tower for heating and absorption, and the high-purity ammonia gas at the top of the tower is compressed and condensed to produce industrial liquid ammonia products; the absorption water is recycled, and the deammonization exhaust gas is treated with water after purification to meet emission standards. This technology combines waste gas treatment with product recovery, solving the ammonia emission problem and producing marketable liquid ammonia or ammonia water products, which is suitable for the treatment of ammonia-containing exhaust gas from coking, synthetic ammonia, urea, and nitric acid plants. The technology has been implemented in engineering applications and has a mature industrial operation base. It can provide services such as process package design, support for the design of the absorption and distillation tower system, recommendations for the selection of ammonia compression and liquefaction system equipment, ammonia safety protection schemes, driving guidance, and operation training.

Dry flue gas desulfurization technology without water consumption and waste water discharge: using quicklime or limestone dry powder as desulfurization agent, directly injected into the flue gas pipeline or a dedicated reactor, the gas-solid two-phase contact completes the adsorption and neutralization reaction of sulfur dioxide, forming solid desulfurization ash, which can be collected by the dust removal system for integrated disposal or utilization. Compared with wet desulfurization, this technology is simple, occupies a small area, has no white smoke and waste water problems, and is particularly suitable for flue gas treatment in areas with water shortages, small and medium-sized boilers, and industrial furnaces. It can also be used as a pre-desulfurization unit before wet desulfurization. This technology has been industrialized and has a mature basis for operation. We can provide services such as process design, desulfurization agent preparation and spray system selection, reactor and dust removal system matching design, desulfurization ash disposal scheme consulting, driving guidance, and operation training to help owners meet emission standards with lower investment.

The pressure swing adsorption (PSA) technology for purification and recovery of medium and high concentration carbon dioxide gas sources is based on solid adsorbents such as molecular sieves and activated carbon. It selectively adsorbs CO2 under high pressure, and is regenerated by decompression or heating, resulting in high-purity CO2 products. The device has no chemical solvent consumption, high automation, and flexible start-up and shutdown, making it particularly suitable for processing high-concentration CO2 sources such as chemical exhaust gas, lime kiln gas, and fermentation gas. The recovered CO2 can be used for food-grade applications, welding protection gas, or further chemical utilization. This technology has been implemented in industrial applications and has a mature basis for industrial operation. Services include design of adsorption packages, selection and filling of adsorbents, recommendations for programmable valves and control systems, design of product gas purification systems, and driving instructions and operation training.

Chemical absorption technology for CO2 capture from high-volume, low-concentration flue gas: flue gas and amine absorption fluid are contacted in an inverse flow in the absorption tower, CO2 is selectively absorbed, the enriched liquid is regenerated by heating and desorption, and high-purity CO2 product gas is obtained. This technology is highly adaptable to low-pressure CO2 and has a large processing capacity, making it the mainstream choice for CCUS projects in coal-fired power plants, steel, cement, and chemical industries. The captured CO2 can be used for oil recovery, geological sequestration, or further processing into chemical products. The technology has been industrialized and has a mature basis for operation. The owner needs to evaluate the conditions for the integration of steam and electricity utilities. Services such as process package design, amine system selection, support for absorption and regeneration tower system design, energy efficiency optimization, CO2 compression and purification system design, commissioning guidance, and operation training can be provided.

The technology for the synthesis of isothiazolinone-type disinfectants (CITs) for industrial water treatment and corrosion prevention is oriented toward the industrial field. The products are produced through processes such as sulfurization, chlorination, and neutralization. These products are characterized by broad-spectrum, high efficiency, and low dosage. They are widely used in the control of microorganisms in fields such as circulating cooling water, paper making, coatings, and daily chemicals. The focus of the process design is on controlling the temperature and feed ratio of the sulfurization and chlorination processes, as well as the safe treatment of chlorine-containing waste gas. The technology has been implemented in industrial applications and has a mature basis for industrial operation, making it suitable for water treatment chemical enterprises in fine chemical parks or chemical enterprises planning to enter the disinfectant market. The owner must have safe supply and storage conditions for chlorine gas or chlorination reagents. Services such as process package authorization, reaction system basic design support, waste gas treatment solutions, product formulation application consulting, driving guidance, and operation training are available.

The classic production route for chlorine-free potassium sulfate is the Mannheim process: potassium chloride and sulfuric acid are reacted at high temperature in a Mannheim furnace to produce potassium sulfate, with the by-product hydrogen chloride being absorbed to produce hydrochloric acid for external sales. The product is a chlorine-free potassium fertilizer, suitable for tobacco, fruit trees, vegetables, and other crops that are sensitive to chlorine. It has a higher market value than ordinary potassium chloride fertilizer. This process is suitable for owners with potassium chloride resources (such as salt lake potassium fertilizer enterprises) or near sulfuric acid supply sources, and it is also suitable for fertilizer enterprises to enrich their high-end potassium fertilizer product lines. This technology has been implemented in industrial applications and has a mature industrial operation foundation. Services such as process package authorization, Mannheim furnace system basic design support, acid-resistant material and equipment selection recommendations, by-product hydrochloric acid absorption solutions, driving guidance, and operation training are available.

With hydrogen fluoride and tetrachloroethylene as raw materials, the technology produces hydrofluorocarbon (R125) and related supporting processes for fluorinated refrigerants, and can extend the layout to include methane (R32). The reaction system uses fluorination catalysts, and supports the processes of hydrogen fluoride separation, product distillation purification, and waste gas treatment, ensuring product purity that meets the requirements for refrigerants. Both R125 and R32 are the current mainstream low-GWP alternative refrigerant components, widely used in the mixing of refrigerant media for household air conditioners and commercial refrigeration equipment. The technology has been implemented in industrial applications, with a mature basis for industrial operation, and is suitable for fluorine chemical enterprises with resources for fluorite-hydrofluoric acid-chloride. Services include process package authorization, fluorination reaction system base design support, catalyst selection recommendations, distillation and waste gas treatment schemes, start-up guidance, and operation training.

The source technology of the nitrogen fertilizer and chemical raw materials industry chain is the ammonia synthesis production process. The coal head route is to gasify raw coal to produce crude gas, and after transformation, carbon removal, and sulfur removal purification, qualified hydrogen-nitrogen gas is obtained; the gas head route is to convert natural gas into syngas, with a shorter process and relatively low carbon emissions. After purification, the nitrogen-hydrogen mixture gas is compressed and synthesized into ammonia under high temperature and pressure using an iron-based catalyst, and the liquid ammonia is separated and recycled to the system. Both routes have been implemented in engineering applications and have a mature industrial operation base, which can be selected according to the coal or natural gas resources available at the site of the owner. The product liquid ammonia can be further processed into urea, ammonium nitrate, or sold directly as a chemical raw material. Services such as feed route selection, plant-wide process package design, key equipment selection for gasification and synthesis systems, catalyst selection, start-up guidance, and operation training are available.

The key link in the downstream extension of oil and grease chemical industry is the technology of fatty acid methyl ester hydrogenation to fatty alcohols: fatty acid methyl ester and hydrogen gas react under the action of a catalyst to produce fatty alcohols, which are then separated by distillation and decarbonized to obtain alcohols with different carbon chain lengths. The products cover the C8-C18 series of fatty alcohols, which are important raw materials for surfactants, detergents, plasticizers, and cosmetics. This route is suitable for the layout of oil and grease chemical parks using natural oils such as palm oil and coconut oil as raw materials, and can also be combined with fatty acid and glycerol plants to form a complete industrial chain. The technology has been implemented in industrial applications and has a mature basis for industrialization. The owner must have hydrogen supply conditions. Services such as process package authorization, hydrogenation reaction system base design support, catalyst selection and filling scheme, distillation system equipment selection recommendations, commissioning guidance, and operation training are available.

Hubei Sanfeng Environmental Protection Technology Co., Ltd. is located in Block C, Han Street Headquarters International, Wuchang District, Wuhan City, Hubei Province. It is a nationally recognized high-tech enterprise specializing in energy-saving evaporation engineering. The factory is situated in Shili Industrial Park, Guangshui City, Hubei Province, with a production base for evaporation equipment exceeding 20,000 square meters, an intelligent titanium equipment manufacturing system, and an advanced R&D laboratory, integrating research, design, production, installation, commissioning, and delivery services.

Sanfeng Environmental has been deeply engaged in the environmental wastewater field for many years, investing substantial resources and building up technical reserves. With a wide portfolio of MVR evaporation system projects, it has become a national leader in professional evaporation system turnkey contracting. To date, Sanfeng Environmental has established cooperative relationships with renowned enterprises such as China Energy Group, Sinopec, PetroChina, China Wuhuan, Sedin Engineering, Beijing Energy Group, Shaanxi Coal Group, Yanchang Petroleum, and Pangang Group. In various sectors, it has provided high-quality evaporation crystallization "turnkey" projects for many premium clients across numerous industries.

Precision innovation and craftsmanship are the core beliefs of Sanfeng Environmental. The company strives to become a respected environmental system solution provider in the fields of zero discharge and resource recovery. Its products are mainly divided into two major segments: complete systems and individual equipment. Complete systems include MVR evaporation systems, multi-effect evaporation systems, thermal concentration, and freeze salt separation. Individual equipment includes skid-mounted evaporators, forced circulation evaporators, falling film evaporators, Oslo crystallizers, and compressors. Combining extensive engineering practice with R&D innovation, Sanfeng is skilled in the evaporation and salt separation processes for various types of high-salt and high-COD wastewater, including sodium chloride, sodium sulfate, ammonium sulfate, ammonium chloride, and potassium chloride. Its products cover numerous fields such as coal chemicals, mine water, coking, hazardous waste, fine chemicals, steel, power, and new energy, providing integrated system solutions including process design, civil design, 3D design, automation control, equipment manufacturing, on-site installation, and commissioning services. It is a national high-tech enterprise, Hubei Provincial Engineering Laboratory, Hidden Champion Demonstration Enterprise, Postdoctoral Industry Base, Academician Expert Workstation, three provincial-level R&D platforms, and one of the first batch of "Specialization, Refinement, Differentiation, and Innovation" Little Giant enterprises. The company holds 8 invention patents and over 200 utility model patents. As a backbone unit in the fan industry, it specializes in centrifugal compressors, MVR steam compressors, heat pump compressors, evaporation crystallization systems, and heat pump distillation systems.