Brief description of technology

Control industrial exhaust gas and nitrogen oxide gas pollution by integrating functional carbon materials and efficient photoelectric catalytic technology. Pollutants are adsorbed and oxidized by functional carbon materials and then enter the photoelectric catalytic treatment unit for treatment. Functional carbon materials are prepared from biomass with local characteristics, and modification gives them adsorption and redox properties; high-efficiency photoelectric catalytic technology applies a small bias to the photocatalytic system, which can greatly improve the removal rate and the durability of the catalyst. The technical characteristics are the use of local biomass to prepare functional carbon materials and advanced gas-phase photocatalytic technology; the key equipment is a three-phase reactor filled with carbon materials and a gas-phase photocatalytic reactor.

technical information

The equipment shell is welded with 2mm thick 304 stainless steel. size 3800*2200*2000。The pretreatment air volume is 40000m3/h. Configure LED light sources.

Commercial applications

no

Help/support you hope to receive during the technology transfer process

no

equipment investment

Investment in waste gas treatment mainly includes two parts: equipment purchase and equipment operation. Power system: fans, electrical supporting equipment Gas collection system: gas collection hood, ventilation pipe, exhaust cylinder Purification equipment: carbonaceous material packed towers, photocatalytic oxidation equipment consumables: carbonaceous materials, photo-oxygen lamp tubes and catalytic plates handle air volume of 40,000 m3/h Main equipment: packed towers, photocatalytic oxidation equipment, etc., a total of 160,000; Air pipes and accessories: 70,000; Fans and auxiliary materials: 90,000; Electronic control system: 70,000; Installation and miscellaneous items: 90,000; Taxes: 71,500 Total price: 551,500 carbon materials are maintained semi-annually and photocatalytic oxidation equipment is maintained annually.

Annual operation and maintenance fee

Operating expenses mainly include electricity, water, pharmaceutical fees, manual maintenance fees and other expenses. The total power of the system is 55 kW, and the power factor of the electricity bill is calculated as 0.80. The electricity bill is 0.65 yuan/(kW·h). It runs for 8 hours and runs for 300 days a year. The annual electricity bill for exhaust gas treatment equipment is about 107,000 yuan; The water bill is calculated as 3.5 yuan/ton and runs for 300 days a year. Among them, the circulating water in the carbon three-phase packed tower needs to be replaced every half a month, and each replacement requires 10 m3. Therefore, the annual water change needs: 10×2×12=240 (tons), annual water fee: 240×3.5 = 0.84 million yuan; the spray liquid in the three-phase packed tower of carbonaceous materials is 10 mmol/L sulfite solution, and the annual consumption of sulfite is 0.39 t. If the sulfite is 4000 yuan/ton, the pharmaceutical fee is 0.39×0.4=0.16  million yuan; According to the annual production of waste residue, the equivalent to the waste and solid treatment cost per ton  is 8,000 yuan; the annual maintenance cost for carbon materials is 10,000 yuan, the annual maintenance cost for photocatalytic is 5,000 yuan, and the labor cost of 100,000/person-year ×2 person-years = 200,000 yuan. The total maintenance and operation cost for the first year is approximately 332,400 yuan.

investment recovery period

This project belongs to gas pollution control and restoration technology, and its benefits are mainly reflected in environmental and social benefits, that is,"mountains of gold and silver are not as good as lucid waters and green mountains."  On the other hand, compared with the currently mature activated carbon adsorption-photocatalytic combination exhaust gas treatment technology, this technology uses advanced functional carbon instead of activated carbon, and advanced gas photoelectric catalytic technology replaces traditional photocatalytic technology. The combination of high-efficiency technologies achieves the same purification effect, while saving one-time investment and annual operating costs by 12% and 26% respectively.

added benefit

Investment in photocatalytic exhaust gas treatment mainly includes two parts: equipment purchase and equipment operation. Equipment purchase cost for treating waste gas of 40,000 m3/h is approximately 60~800,000 yuan, of which investment in photocatalytic oxidation, absorption tower and activated carbon adsorption accounted for about 15%, 10% and 12% of the total investment respectively, and the system purification rate ranged from 60% to 90%. The initial investment in functional carbon material integrated photoelectric catalytic industrial exhaust gas treatment technology mainly includes photoelectric catalytic equipment, functional carbon material three-phase packed towers and their supporting equipment. Among them, the three-phase packed tower of carbonaceous materials integrates spraying, adsorption and redox functions. Compared with traditional photocatalytic-based exhaust gas treatment technology, the initial investment of the system is directly reduced by 12% by removing activated carbon adsorption equipment. The operating cost of waste gas treatment technology equipment includes electricity, water, and material maintenance fees. The total power of the existing exhaust gas treatment system with a typical 40,000 m3/h treatment capacity is about 75 kW. The photoelectric catalytic industrial exhaust gas treatment technology uses a shallow ultraviolet LED light source, which reduces the power by 20 kW and saves electricity bills by 39,000 yuan/year. Existing waste gas treatment technology costs 126,000 yuan per year on activated carbon, and activated carbon needs to be disposed of as hazardous waste; while functional carbon materials have self-cleaning functions, long replacement cycles, and average maintenance costs of 10,000 yuan/year, saving activated carbon maintenance by 116,000 yuan/year. The annual operating cost of traditional spraying-activated carbon adsorption-photocatalytic oxidation technology is 449,000 yuan/year, while the total annual maintenance and operation cost of functional carbon material integrated photoelectric catalytic industrial exhaust gas treatment technology is approximately 332,400 yuan, and the annual operating cost is reduced by approximately 26%.

comprehensive benefits

According to the "Comprehensive Emission Standard for Air Pollutants"(GB 16297-1996), gaseous pollutants are detected, and the purification rate of VOCs and other pollutants is>90%.

Level of impact of obstacles on technology transfer

no

technology maturity

The adsorption-photocatalytic combination technology is safe and effective, has low construction and operation costs, and has a small floor area. It is an industrial waste gas treatment technology widely used internationally. After nearly 20 years of industrial practice, a complete process route, equipment and system integration has been established, and its market share has reached more than 45% in my country. This project integrates two core patented technologies into existing processes and equipment, utilizing local materials and adapting local conditions to improve efficiency and reduce costs.

technical applicability

Functional carbon materials integrate photoelectric catalytic exhaust gas treatment technology, which can fully couple the rich biomass with the characteristics of the "Belt and Road" region as a substrate to prepare functional carbon materials to achieve adsorption and oxidation and reduction of pollutants; at the same time, the "Belt and Road" region has rich reserves of rare earth oxides, combined with my country's semiconductor industry technology, to achieve advanced and low-cost photoelectric catalyst production. This technology does not involve high-end manufacturing and has a good matching relationship with the upstream and downstream technology chains of the "Belt and Road" countries. Collaborative technology is suitable for purifying low-concentration exhaust gases released by many industrial processes, especially for countries along the Belt and Road Initiative with sufficient solar energy resources.

technical stability

In China, basic technologies for integrated control of carbon materials and photocatalytic gas pollutants have been widely used in the treatment of exhaust gases and nitrogen oxides generated by various industrial processes. Many environmental protection companies including Wuhan Fengbaishun Environmental Protection Purification and Ventilation Equipment Co., Ltd., the partner of this project, have mastered similar technologies and have gone through long-term engineering practice. This project is an improvement of the core technology. Based on the characteristics of countries along the Belt and Road Initiative, it uses local biomass to prepare high-efficiency carbon materials, and adopts the most advanced gas-phase photoelectric catalytic technology to reduce one-time investment and operating costs, and build environmental protection technologies that are more in line with the national conditions of countries along the Belt and Road Initiative. Photocatalysis is a pollutant control technology that uses light energy to convert chemical energy. Abundant sunlight resources are conducive to the development and implementation of the technology.

technical safety

Integrated control of carbon materials and photocatalytic gas pollutants is a green and environmentally friendly approach. It does not produce secondary pollution during operation and does not involve environmental and safety accident risks such as leakage of flammable, explosive and highly toxic substances; Carbon materials can be made from biomass with territorial characteristics. The photocatalytic materials are prepared from Ti-containing substances and rare earth oxides. There are no systemic risks such as upstream resource limitations, imperfect supporting facilities, and low market acceptance.

Barriers to technology transfer and promotion

no

intellectual property transfer

(1) If it is jointly developed by multiple units, it must be noted at the same time. Wuhan Fengbaishun Environmental Protection Purification and Ventilation Equipment Co., Ltd. (2) If intellectual property rights such as patents are obtained, the patent number must be indicated.  (3) If it is a result of a national science and technology plan project, the source of the project topic must be indicated. Some of the results come from the national cooperation project "2016YFE0126300" with Japan.  (4) If there are multiple units involved in technology research and development, a representative unit must be selected and listed after judgment. Wuhan Fengbaishun Environmental Protection Purification and Ventilation Equipment Co., Ltd. (5) Focus on domestic intellectual property technologies, and the technical requirements introduced from abroad have been localized.