With the advent of the era of ultra-low emission, the control of fugitive emission has become one of the most important tasks of “Defending the Blue Sky”. As one of the leaders in the control of fugitive emission, 新葡萄在线8883官网 has advanced core technologies in many fields, including dust control, VOCs control and regional air monitoring.
Comprehensive Regional Dust Removal System
In theory, the control of fugitive dusts can be categorized into two types: controlling after emission and suppressing dust at source. Controlling after emission focuses on the collection and capture of dust after emission, while suppressing dust at source is centered on control the production and emission of dust at source.
In practice, a single fugitive dust control technique cannot solve all the problems about dust. Therefore, 新葡萄在线8883官网 proposed comprehensive dust removal concept according to the difficulties of dust control in different industries and different production techniques. If we take controlling after emission as temporary solution and suppressing dust at source as permanent cure, then the comprehensive dust suppression system of 新葡萄在线8883官网 addresses both symptoms and root causes to prevent and control the dust pollution completely.
新葡萄在线8883官网’s comprehensive regional dust removal system combines different dust removal technologies, including biological nano membrane dust suppression technology, fry fog dust suppression technology, airtight dust suppression technology and mechanical dust collecting technology, and captures the dust according to the stages that dust is produced. According to the dust producing characteristics and dust features, different dust suppression equipment is adopted flexibly to guarantee higher dust suppression efficiency and save the energy. This system can be used in many industries that discharge fugitive dust, including iron and steel, power, cement, mining, construction waste recovery, storage yard and port etc., to effectively reduce the producing of particulate matters, control PM2.5 and PM10 and prevent fog and haze.
In addition, 新葡萄在线8883官网 comprehensive regional dust removal system is equipped with 新葡萄在线8883官网 cloud intelligent control system and each device can be controlled automatically through the network. 新葡萄在线8883官网 cloud intelligent system automatically controls the load level of the system and the usage amount of nano membrane preparation according to the dust output or concentration. The whole system can significantly reduce labor costs, avoid misoperation, allocate parameters automatically, save energy to the greatest extent while ensure that the system controls the dust effectively. Besides, it ensures long-term stable operation of the system and reduces the operating and maintenance costs.
Exhaust Gas Control System
The exhaust gas treatment technologies of 新葡萄在线8883官网 include single technology and combined technologies.
新葡萄在线8883官网’s CND technique creatively solves the energy utilization efficiency problem during the hot gas desorption process. The recovery rate of volatile organic components is more than 95%, and there is no secondary water pollution. This technique is suitable for the control of organic pollutants with higher boiling point to improve economic returns. Besides, it is characterized by the features of low energy consumption, low operation cost, good safety performance and low explosion risk.
The integrated technology of 新葡萄在线8883官网 is mainly catalytic oxidation and regenerative thermal oxidation combined with zeolite roller adsorption and concentration technology, and can removal different exhaust gases, including benzene, toluene, xylene, ethyl acetate, 2-butanone, butyl acetate, cyclohexanone, etc. The removal rate of VOCs reaches more than 99%.
Regenerative Thermal Oxidizer (RTO)
Working principle: the VOCs are oxidized into CO2 and H2O under high temperature so as to purify exhaust gas and recover the heat released by the decomposition of waste gas. The three-chamber RTO exhaust gas decomposition efficiency reaches more than 99%, and the heat recovery efficiency reaches more than 95%. The main structure of Regenerative Thermal Oxidizer is composed of combustor, heat storage chamber and switching valve, etc.
The high temperature gas after oxidization flows through specially designed ceramic regenerator and the heat is stored in it to preheat the subsequent VOCs and save the fuel consumption used to heat the exhaust gas. There are two or more ceramic regenerators, and each regenerator goes through the procedures of heat storage, heat release and cleaning successively and works continuously. The regenerator shall be immediately cleaned by introducing an appropriate amount of clean air (to ensure the VOC removal rate reaches more than 98%) after the “heat release”, and only after the cleaning is completed can the regenerator enter the "heat storage" process. Otherwise, the residual VOCs will be discharged into the chimney along with the flue gas to reduce the removal efficiency.
Regenerative Catalytic Oxidizer (RCO)
Operating principle: The exhaust gas containing VOCs enters double halt regenerative oxidizer, and the three-way switchover air valve leads the exhaust gas into the heat storage halt for preheating. The polluted exhaust gas is gradually heated by the ceramic regenerator and then enters the catalyst bed. The ceramic regenerator is heated, and the clean gas after combustion and oxidation gradually reduces its temperature, so the outlet temperature is slightly higher than the inlet temperature of the RCO. The three-way switchover air valve switches to change the outlet/inlet temperature of the RCO. If VOCs concentration is high enough and enough heat is released, the regenerative catalytic oxidizer doesn’t need fuel. For example, when the heat recovery rate is above 95%, the outlet temperature of the RCO is only 25℃ higher than the inlet temperature.
Regional Monitoring and Early Warning System
The “regional grid monitoring and warning system” of 新葡萄在线8883官网 is suitable for the air monitoring of industrial park, environmental information and industrial emission process control, etc.
The system can monitor the source, distribution and trend of the regional fugitive particulate matters and exhaust gas accurately and fastly in real time, and the cost can be reduced. Besides, the system simulates the diffusion scope and extant of the fugitive particulate matters to conduct early warning.
At the same time, the system is available for the overall monitoring of emission area, warning of pollutants diffusion trend, tracing and analyzing of emission source, etc. In addition, it supports the unified query of air pollutant monitoring information in industrial areas and has formed a dynamic evaluation system for the regional air pollutant emission status and regional atmospheric environment status to provide reliable data and scientific supporting decision.
The regional monitoring and early warning system of 新葡萄在线8883官网 strictly implements national policies for the prevention and control of fugitive emissions pollution, to monitor and conduct warning on the fugitive emission, and provide data for the administrative department to trace pollution source, make plan, control pollution at the source, analyze pollutant transport channel, claim responsibility in accordance with the law, conduct multidimensional forensics and comprehensive assessment and control the fugitive emission scientifically according to the law and evidence.
