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Chemical VOCs treatment
INDUSTRY OVERVIEW
Treatment of VOCs in Petrochemical Industry
Petrochemical industry is an important component of the chemical industry and plays an important role in the development of the national economy. It is one of the pillar industries in China. Petrochemical industry refers to the processing industry that produces petroleum products and petrochemical products using petroleum and natural gas as raw materials. Petroleum products, also known as oil products, mainly include various fuel oils (gasoline, kerosene, diesel, etc.) and lubricants, as well as liquefied petroleum gas, petroleum coke, paraffin, asphalt, etc. The process of producing these products is often referred to as petroleum refining, abbreviated as refining. Petrochemical products are obtained through further chemical processing of the raw oil provided by the refining process.
SOURCES OF EXHAUST GASES
Solvent extraction
Adsorption
Organisms
Membrane separation
Oxidisation
Incinerators
EXHAUST GAS COMPOSITION
benzene
toluene
xylene
Acrylic acid
Ethers
lipid
alcohols
Ketones
styrene
The main sources of production include combustion flue gas, process exhaust gas, hydrocarbon gases leaked from equipment, and foul odor gases emitted from alkali residue treatment plants, sewage treatment plants, etc.
EMISSION STANDARDS
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Number
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Control project
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Exhaust pipe height(m)
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Draft for soliciting opinions allows for emission rates (kg/h)
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Emission release rate of version 93(kg/h)
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Check location
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1
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NH3
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15
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0.6
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4.9
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Workshop or production facility exhaust pipe
|
|
2
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C3H9N
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15
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0.15
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0.54
|
|
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3
|
H2S
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15
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0.06
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0.33
|
|
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4
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CH3SH
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15
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0.006
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0.04
|
|
|
5
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(CH3)2S
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15
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0.06
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0.33
|
|
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6
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C2H6S2
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15
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0.15
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0.43
|
|
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7
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CS2
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15
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1.5
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1.5
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|
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8
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C8H8
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15
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3.0
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6.5
|
|
|
9
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Odor concentration
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Exhaust pipe height (m) ≥ 15
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Standard value (dimensionless) 1000
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Standard value (dimensionless) 2000
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TREATMENT CHALLENGES
High intensity of exhaust emissions
As a major manufacturing country, China ranks first in the world in terms of VOC emissions. According to the latest data from the China Environmental Planning Research Institute, China's VOC emissions exceed 30 million tons. The total amount of VOCs emitted by the petrochemical industry accounts for about 20% of the total national emissions. Based on this proportion, the estimated annual VOCs emissions from the petrochemical industry reach 6 million tons.
The concentration of emitted exhaust gas is generally high
The petrochemical industry emits a variety of pollutants, in addition to gasoline, diesel, and natural gas emitted during petroleum refining and storage, as well as a large amount of benzene, alcohols, aldehydes, and ketones emitted from the production of petrochemical products using petroleum and natural gas as raw materials.
The types of pollutants in exhaust gas are complex
The petrochemical industry often uses organic raw materials, resulting in a higher concentration of organic components in wastewater and a higher concentration of volatile organic odor pollutants. Some organic pollutants also have certain toxicity.
Multiple sources of exhaust emissions
There are many sources of VOCs emissions in the petrochemical industry, including: leakage from equipment dynamic and static sealing points; Organic liquid storage and blending volatile losses; Volatility loss during loading and unloading of organic liquids; Organized emissions from processes; Process unorganized emissions; Torch discharge; Cooling tower and circulating water cooling system release.
PROCESS FLOW
ECLEAR ADVANTAGES
Strength guarantee
More than 20 waste gas treatment technologies developed by the Sino British joint venture team of a national high-tech enterprise
Quality assurance
200+ project cases of stable operation without worrying about advantages
After-sales service
Free 24-hour online service with after-sales team
Technical Team
Team members have more than ten years of experience in waste gas management, including three registered HVAC engineers registered drainage engineers, two builders
Sourcing company
Cost-effective equipment engineering for better control of your costs
Environmental compliance
Full process management services make it easy for you to cope with the environmental protection bureau acceptance of meeting the new exhaust emission standards
Eclear Environmental RELATED CASES
Wastewater deodorization by Zhongte New Chemical Energy Technology Co., Ltd. in Huangshi City, Hubei Province
Hubei Zhongte New Energy Technology Co., Ltd. is a limited liability company that has been deeply involved in the manufacturing industry for a long time. The company has 8 main members. After its establishment in Hubei Province, our company has developed rapidly and continuously accumulated innovative advanced technologies with strong technical strength. While developing, our company always adheres to the guiding ideology of "survival through quality and development through innovation", putting quality and innovation first. Hubei Zhongte New Energy Technology Co., Ltd. pursues professionalism and specialization, always adhering to the corporate purpose of "integrity, innovation, and communication", and the team spirit of "technology and service" as the foundation of business, continuously improving user satisfaction.
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Jining City, Shandong Province Jining Coal Chemical Deodorisation Project
Shandong Jimei Minsheng Coal Chemical Co., Ltd. was established in 2008-12-26, the legal representative is Tan Fangfeng, the registered capital is 300 million yuan RMB, the unified social credit code is 91370800683233988B, the enterprise address is located in Jining City, Jining Jinxiang County, Huji Town, Jining Chemical Industrial Development Zone, belongs to the industry of non-metallic mineral products industry, the scope of business includes: coal tar, Crude benzene, sulphur, gas production and sales (the above items are operated with a licence, the validity of which shall be subject to the licence); coke production and sales; ammonium sulphate production and sales; needle coke and its by-products of the production and sales; steam production and sales; import and export of goods and technology (except for those goods and technologies that are restricted or prohibited by the state). (Items subject to approval by law can only be operated after approval by relevant departments). Shandong Jimei Minsheng Coal Chemical Co., Ltd. is currently operating as an operating (open) enterprise.
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Tangshan Iron and Steel Tianshun Coking Wastewater Deodorization Project in Tangshan City, Hebei Province
The three enterprises under Tangshan Iron and Steel Group are all large backbone steel enterprises with early factory construction in China. Tanggang was founded in 1943 and is known as the "hometown of converters". It is also one of the earliest enterprises in China to successfully apply continuous casting technology to large-scale industrial production. After the reform and opening up, Tangsteel has continuously accelerated its development pace and entered the top ten steel companies in the country. Xuangang was founded in 1919. During the planned economy period, it was a designated national pig iron supply base and also trained a large number of professional technical talents in mining and pig iron smelting for the metallurgical industry. Under the conditions of a market economy, Xuansteel has risen and achieved rapid development in adversity, becoming one of the key national steel enterprises. Chenggang is one of the 156 key projects established by the country in 1954. It has been committed to the development and utilization of vanadium titanium magnetite resources and the industrialization process of related scientific research achievements. It is the birthplace of blast furnace smelting technology for vanadium titanium magnetite in China and the largest vanadium containing steel production base in the north.
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Shaanxi Yulin North China Oil & Gas Branch Gas Field Water Centralised Treatment Plant Odour Control Project
North China Petroleum Bureau Co., Ltd. and North China Oil and Gas Branch is a professional team of oil and gas exploration and development with a glorious history of 60 years, covering 22 provinces (municipalities and autonomous regions) in China, and playing a strategic leading role and making important contributions to the discovery and construction of oil and gas fields such as Daqing, Shengli, Central China Plains and Jianghan, etc. After merging into SINOPEC in 2000, it has successfully developed Da Niu Di gas field, the first large-scale gas field constructed by SINOPEC itself, and become the main gas source of SINOPEC in North China. After merging into SINOPEC in 2000, SINOPEC successfully developed the Da Niu Di gas field, the first large gas field built by the Group, which became the main source of gas for SINOPEC in the North China region, and effectively supported the economic construction and regional development of the provinces and regions along the Yellow River Basin, and realised a successful transition from a traditional geological exploration unit to an oil and gas field enterprise. "At the end of 2012, after professional restructuring, the company realised the operation of oil bureau, oil company and engineering section in three parts, and changed its name to North China Petroleum Bureau Co.
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Eclear Environmental RELATED EQUIPMENT
Zeolite wheel+CO
The zeolite rotary device+catalytic combustion of CO is mainly suitable for treating high concentration CO waste gas. Usually, when the CO concentration is 500 ppm (volume fraction) or higher, a zeolite rotary device combined with catalytic combustion of CO is required for treatment. If the CO concentration is low, other waste gas treatment technologies may be more suitable. Zeolite rotary device is a technology used to separate components from gas mixtures. This type of device usually includes many zeolite molecular sieve wheels, which can selectively adsorb certain molecules without adsorbing other molecules, thereby achieving component separation in gas mixtures. Catalytic combustion of CO is a technology that converts CO (a toxic and harmful gas) into CO2 (a relatively harmless gas). This technology uses catalysts to accelerate the reaction between CO and oxygen, thereby reducing the concentration of CO.
Zeolite wheel+TO
Zeolite wheel+TO direct combustion furnace is an efficient and environmentally friendly industrial waste gas treatment equipment. It can effectively treat various organic pollutants in industrial waste gas through two methods: physical adsorption and high-temperature incineration. This device has the advantages of high efficiency, energy conservation, wide applicability, and easy maintenance, and has broad application prospects in the field of industrial waste gas treatment in the future.
Zeolite wheel+RCO
The zeolite wheel+RCO catalytic combustion equipment is currently a mature and practical process in the field of organic waste gas treatment in China. Adopting a three step continuous program of adsorption desorption cooling, with simultaneous adsorption and desorption. The zeolite wheel first adsorbs and collects organic waste gas, compresses it, and increases its concentration. Then, high concentration waste gas molecules are desorbed from the zeolite wheel and sent to a catalytic oxidation furnace (CO furnace) for flameless combustion. To achieve the purpose of purifying organic waste gas. The zeolite wheel+RCO equipment mainly consists of exhaust gas pretreatment system, zeolite wheel adsorption concentration system, desorption system, catalytic combustion system, cooling and drying system, and automatic control system.
Zeolite wheel+RTO
The zeolite wheel+RTO process is currently one of the hottest processes in the waste gas treatment industry. Compared to other new materials, industries such as new energy, chemical, and semiconductor directly use RTO for incineration. The zeolite wheel RTO process has very guaranteed compliance and safety performance. The working principle of zeolite rotary RTO is to use combustion reactions at high temperatures to oxidize organic compounds in exhaust gas into harmless carbon dioxide and water, thereby achieving the goal of purifying exhaust gas. Its core is a rotating heat exchanger filled with adsorption materials such as zeolite.
Spray tower
Spray tower, as a type of environmental waste gas treatment equipment, exists. According to its working principle, it can be divided into circulating water spray tower, alkali spray tower, and acid spray tower (also known as acid washing tower). According to the material of the tower, it is divided into fiberglass spray towers, PP spray towers, and stainless steel spray towers. Choose a reasonable spray material and spray process based on the different properties of the exhaust gas. Spray tower is an important industrial waste gas treatment equipment, whose working principle is to use water and power technology to spray liquid or gas in a mist form into the waste gas, in order to remove harmful substances in the waste gas.
Washing tower
Washing tower is a mature waste gas treatment equipment widely used in pre-treatment of industrial waste gas treatment, dust removal, and other aspects. Gas enters the tower and fully contacts, adsorbs, and dissolves with the washing liquid inside the tower, achieving purification effect. The design forms of Yi cleaning towers are diverse, and vertical or horizontal structures can be used according to the project application site. The commonly used materials for washing tower equipment include PP, FRP, and stainless steel. PP and FRP are commonly used in chemical absorption towers and have the characteristics of acid resistance, alkali resistance, and corrosion resistance. Stainless steel materials can be used for high-temperature exhaust gas.
VOCs integrated processing equipment
The activated carbon adsorption box (YQA all-in-one machine) is a VOCs waste gas treatment equipment developed by Eclear Environmental through years of research and engineering experience combined with the photocatalyst technology of university research institutions. It adopts a dual process combination of photocatalytic oxidation and activated carbon adsorption, as well as an integrated design concept.
Biological deodorization
Biological deodorization is the process of using effective deodorizing bacteria and a reasonable equipment structure to oxidize and decompose large molecules or structurally complex organic matter into simple inorganic substances such as water and carbon dioxide through differentiation. Eclear Environmental Biological Deodorization has been improved compared to its peers, adopting an integrated process of pre-treatment and deep adsorption of biological treatment to ensure the stability of the intake during the biological treatment stage. At the same time, deep treatment is not configured at the end, which can ensure that the exhaust gas meets the standard emission when the emission concentration exceeds the design emission concentration.
Biological filter
A biological filter is a device that uses effective deodorizing bacteria and a reasonable equipment structure to oxidize and decompose large molecules or structurally complex organic matter into simple inorganic substances such as water and carbon dioxide through differentiation. Eclear Environmental Biological Filter has been improved compared to its peers, adopting an integrated treatment process of pre-treatment and deep adsorption of biological treatment to ensure the stability of the intake during the biological treatment stage. At the same time, deep treatment is not configured at the end, which can ensure that the exhaust gas meets the standard when the emission concentration exceeds the design.
Coupling catalytic all-in-one machine
The equipment adopts a stainless steel fixed pry mounted fully sealed structure, which is easy to install. The interior is coated with stainless steel special anti-corrosion material, which is resistant to acid, alkali and waste gas environments. The equipment has a long service life and is composed of a pre-treatment section, a coupled reaction device, and an array drawer type module. The high-energy particle field generated by the coupling catalytic network of precious metals is irradiated through the ultraviolet band to the coupling synergy effect of independently prepared precious metals and titanium dioxide nanoparticles. VOCs organic waste gas is decomposed into carbon dioxide, water, etc. Other waste gas molecules that have not been completely degraded can be oxidized into water-soluble small molecules and some active free radicals.
Activated carbon adsorption box
Activated carbon adsorption box is an environmentally friendly mechanical product that filters waste gas and adsorbs odors. This equipment is used to clean organic chemical waste gas and spray waste gas with high concentration. Activated carbon has a high-strength adsorption level. When the waste gas is powered by a centrifugal fan, negative pressure enters the adsorption box and then enters the activated carbon adsorption layer, it has a very good adsorption effect on organic solution waste gas.
Coupling catalytic exhaust gas treatment equipment
The equipment adopts a stainless steel fixed pry mounted fully sealed structure, which is easy to install. The interior is coated with stainless steel special anti-corrosion material, which is resistant to acid, alkali and waste gas environments. The equipment has a long service life and is composed of a pre-treatment section, a coupled reaction device, and an array drawer type module. The high-energy particle field generated by the coupling catalytic network of precious metals is irradiated through the ultraviolet band to the coupling synergy effect of independently prepared precious metals and titanium dioxide nanoparticles. VOCs organic waste gas is decomposed into carbon dioxide, water, etc. Other waste gas molecules that have not been completely degraded can be oxidized into water-soluble small molecules and some active free radicals.
RCO thermal storage catalytic combustion
Regenerative catalytic combustion (RCO) is a method of using catalysts to decompose organic waste gases into harmless small molecules such as carbon dioxide and water. Due to the need to consume heat in the reaction, it is called regenerative catalytic combustion method. The RCO device mainly consists of three parts: a purification chamber, a preheating chamber, and a high-temperature gas outlet, with the temperature of the preheating chamber generally ranging from 300 to 600 ° C; The purification room is equipped with a packing layer to adsorb pollutants from organic waste gas; The high-temperature gas outlet is connected to the atmosphere to recover heat.
RTO thermal storage oxidation furnace
The English name of a regenerative thermal incinerator is "Regenerative Thermal Oxidizer", therefore it is abbreviated as "RTO". The principle is to heat the organic waste gas to above 800 degrees Celsius, causing the VOC in the waste gas to oxidize and decompose into carbon dioxide and water. The high-temperature gas generated by oxidation flows through a specially designed ceramic heat storage body, causing the ceramic body to heat up and "store heat". This "heat storage" is used to preheat the subsequent organic waste gas entering, thereby saving fuel consumption for waste gas heating. The ceramic heat storage body should be divided into three compartments, each of which should go through the procedures of heat storage, heat release, and cleaning in sequence, and work continuously. After the heat storage chamber releases heat, a portion of the treated and qualified clean exhaust should be immediately introduced to clean the chamber (to ensure a VOC removal rate of over 95%). Only after the cleaning is completed can the "heat storage" program be entered.
CO catalytic combustion
Catalytic combustion is a purification method that uses a catalyst to oxidize and decompose combustible substances in exhaust gas at lower temperatures. So, catalytic combustion is also known as catalytic chemical conversion. Due to the catalyst accelerating the process of oxidation and decomposition, most hydrocarbons can be completely oxidized through the catalyst at temperatures ranging from 300 to 450 ℃. Compared with thermal combustion, catalytic combustion requires less auxiliary fuel, consumes less energy, and has a smaller volume of equipment and facilities. However, due to the poisoning of the catalyst used, the replacement of the catalytic bed, and the high cost of cleaning, the promotion and application of this method in industrial production processes have been affected.
TO direct combustion oxidation furnace
Direct combustion incinerators process VOCs through the principle of high-temperature oxidation. The internal structure of conventional furnaces is a cavity structure, and various heat recovery devices such as heat exchangers and boilers can be installed outside the furnace according to customer needs. Direct combustion incinerators can be widely used for complex waste gases with high concentrations and particulate matter, and effectively recover the heat energy released during the oxidation process. Direct combustion incinerators have diverse shapes and can be designed according to the characteristics of the site space, such as square and cylindrical chambers. They can also be made into vertical furnaces, horizontal furnaces, L-shaped furnaces, etc.
