Products
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Hydrogen production by splitting methanol
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MEA-MDEA-NHD Desulfurization Technology
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Special acid regeneration equipment
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Valve
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CO removal by pressure swing adsorption
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Methane extraction technology – coalbed methane
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Food grade CO2 purified
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Vinyl chloride recycling technology
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Unit desalting and demineralization equipment and special resin
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Coke gas purification technology
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Technology of desulfurization and CO2 removal using NHD method
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Flue gas desulfurization technology using ammonia
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Hydrogen production by coal gasification
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Ionic liquid desulfurization technology
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Ionic liquid desulfurizer
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CO2 removal by pressure swing adsorption
Ethylene tail gas recovery
In recent years, with the increase in people's awareness of environmental protection, the improvement of environmental requirements for petrochemical plants in China and around the world, and the recovery and reuse of waste to reduce production costs, considering the higher economic efficiency for enterprises, the exhaust gas recovery technology of ethylene and acrylic plants has great social and economic benefits.
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Ethylene tail gas recovery
Description of technology
In recent years, with the increase in people's awareness of environmental protection, the improvement of environmental requirements for petrochemical plants in China and around the world, and the recovery and reuse of waste to reduce production costs, considering the higher economic efficiency for enterprises, the exhaust gas recovery technology of ethylene and acrylic plants has great social and economic benefits.
Using the adsorption ability of the adsorbent to various gas components and the ability to change the adsorption capacity and adsorption rate under different pressures, a pressure absorption layer is used to adsorb the C2 component in the catalytic dry gas, eliminating components such as H2, CH4, N2, which are difficult to absorb; When the pressure of the adsorption layer drops, the adsorption components are eliminated to achieve the separation goal. The process uses a multi-column cycle to ensure process continuity
Flow diagram
Typical Performance
| 1 | Maoming Petrochemical Company | 600Nm3/h | Polypropylene waste gas | Propylene processing | P.S.A. |
| 2 | Shandong Dongfangming Chemical Co. | 2000 Nm3/h | Cyclohexane exhaust | recall (defective product) | TSA＋PSA |
| 3 | Kangzhou Petrochemical Company | 1000Nm3/h | Chlorpropylene off-gas | Propylene processing | P.S.A. |
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Wet CO2 removal technology
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Flue gas CO2 recovery technology
The flue gas from casing kilns (lime kilns) is characterized by low pressure, high temperature, dust, low CO2 content and the presence of impurities such as NOx and SO2. According to the characteristics of the feed gas and the product quality requirements, the technological process of flue gas CO2 recovery plant mainly includes: deep furnace gas purification, single-column VPSA enrichment, double-column VPSA enrichment, CO2 compression, CO2 purification, CO2 liquefaction and purification, CO2 evaporation, storage and supply system.
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Flue gas desulfurization technology using ammonia
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Ionic liquid desulfurization technology
Ionic liquid house gas desulphurization technology is mainly designed to treat and utilize sulfur dioxide in flue gas and other industrial waste gases. The most important feature of the technology is that, simultaneously with the removal of sulfur dioxide from the flue gas, high-purity sulfur dioxide (>99.5%) is produced by-product and sulfur pollutants are recycled. High-purity sulfur dioxide can serve as an excellent raw material for the production of liquid sulfur dioxide, sulfuric acid, sulfur and other chemical products.
CO removal by pressure swing adsorption
Purification of carbon monoxide from a mixture containing carbon monoxide is carried out by PSA technology. First remove carbon dioxide, moisture and traces of sulfur from the feed gas; The purified gas enters the VPSA unit to remove hydrogen, nitrogen, methane and other impurities, the adsorbed carbon monoxide is removed as a product after vacuum desorption during decompression.
Liquefaction of natural gas
The production of LNG from natural gas first involves the absorption of CO2, H2S and other acidic components of natural gas with an MDEA solution. The unabsorbed purified gas is dried after separating the liquid, then enters the cold box to produce LNG.
Hydrogen production by coal gasification
Producing technical hydrogen from coal is a good option for large-scale hydrogen production or in the absence of other suitable raw materials. From raw coal, high purity hydrogen is produced through gasification, conversion, purification, PSA, etc. units.
absorbent
An adsorbent is a solid substance that can effectively adsorb certain components from gases or liquids. Adsorbents usually have the following characteristics: large specific surface area, suitable pore structure and surface structure
MEA-MDEA-NHD Desulfurization Technology
A typical amine desulfurization and decarbonization process consists of four parts: absorption, flash evaporation, heat exchange and regeneration (stripping).
Hydrogen production from coke oven gases
Coke oven gas has the characteristics of large gas volume, low pressure, complex impurity content and low hydrogen content. In addition to being used to generate electricity, hydrogen can be recovered for use in chemical plants such as coal tar hydrogenation plants, glycol plants and synthetic ammonia plants. High purity hydrogen gas is obtained from coke oven gas through compression, purification, conversion, PSA, etc. units. Through process integration, it is also possible to simultaneously produce CO, hydrogen and LNG products.
Desulfurization technology using the redox wet method
HDS cyanogen desulfurization and removal technology is a wet oxidation method, which is a distinctive desulfurization method developed by Huaxi and scientific and technical personnel in the synthetic ammonia and coke industry, which allows the desulfurization percentage of H2S in gas to be at least 99.9%, and the desulfurization percentage of HCN to be more than 97%.
Hydrogen production by splitting methanol
This process is based on the convenient source of methanol and desalting water as raw materials, at a temperature of 220-280°C, a special catalyst is catalyzed into converted gas containing hydrogen and carbon dioxide, the principle of which is as follows: Main reaction: CH3OH=CO+2H2 +90.7 kJ/mol CO+H2O=CO2+H2 -41.2 kJ/mol General reaction: CH3OH+H2O=CO2+3H2 +49.5 kJ/mol Auxiliary reaction: 2CH3OH=CH3OCH3+H2O -24.9 kJ/mol CO+3H2=CH4+H2O -+206.3 kJ/mol
Methane extraction technology – coalbed methane
At present, both at home and abroad, the main method for separating oxygenated coalbed methane is membrane separation, oxygen removal method, pressure swing adsorption (PSA) method, direct liquefaction method. After comprehensive comparative study of other low-enrichment gas separation technologies, Huaxi, based on its own low-concentration gas development technology, with complete analysis of the properties of the source gas, adopted pressure swing adsorption technology to separate CH4 and N2/O2 under micro-pressure conditions. Gas with low concentration and methane content of 10 to 15% can be enriched up to 30% at a time for combustion and power generation, as well as secondary enrichment for natural gas production. Installation scale: 2000~30000nm³/h.
Unit desalting and demineralization equipment and special resin
This unit is an exclusive block device for the ionic liquid flue gas desulfurization project and is the key equipment for the ionic liquid desulfurization process, the desalting device is designed to remove harmful impurities such as sulfuric acid roots, chlorine and fluorine in the ionic liquid; Sodium Removal Device are used to remove harmful cationic impurities such as sodium in ionic liquid.
Food grade CO2 purified
Food CO₂ purified Adopting the internationally recognized new catalytic oxidation purification technology, the catalytic purification tower adopts a new type of internal cooling device, so that the bed temperature distribution is in the appropriate reaction zone, normal production heat balance, reducing the use of electric furnaces and extending the service life of the catalyst.