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Large-scale natural gas liquefaction unit

Large-scale natural gas liquefaction unit
The core of the large natural gas liquefaction equipment in the tube wound heat exchanger, the aluminium alloy tube welded to the composite tube plate, the shaking conditions and the impact on the reliability of the connection structure of the tube wound body, tube plate and central cylinder.
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May 09, 2021
On May 6, the conference of DEAR Air Separation celebrated May 1st International Labor Day and the provincial “May 1st” advanced Model Recognition Con
Apr 09, 2021
In order to improve the safety awareness and safety operation skills, make employees have the knowledge of safety production necessary for their own w
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Large complete air separation plant KDON(Ar)- 30000/70000-900 solution for chemical industry
DEAR air separation has provided many sets of air separation plant for chemical industry for many years, with rich experience and the safe and stable unit operation. This unit adopts molecular sieve purification, booster turbine expander to supply the cooling capacity of the unit, and the whole rectification hydrogen-free argon production process. The rapid growth of enterprises in the industry is accompanied by the demand for production and the demand for air separation plant. DEAR air separation has cooperated with customers in the large-scale complete set of air separation plant KDON (AR) - 36000/70000-1200 project, which provides customers air separation plant with mature technology, reliable and convenient operation, and energy saving intelligence, which improves the production efficiency of customers, saving the operation cost and creates greater economic benefits.
Large complete air separation plant KDON(Ar)-13000/22000-350 solution for chemical industry
DEAR air separation has provided many sets of air separation plant for chemical industry for many years, with rich experience and the safe and stable unit operation. This unit adopts molecular sieve purification, booster turbine expander to supply the cooling capacity of the unit, and the whole rectification hydrogen-free argon production process. The rapid growth of enterprises in the industry is accompanied by the demand for production and the demand for air separation plant. DEAR air separation has cooperated with customers in the large-scale complete set of air separation plant KDON (AR) - 13000 / 22000-350 project, which has meet the capacity demand and safety demand of the enterprise.
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The principle of expander with motor brake in air separation plant is to control the speed of expander by braking torque generated by motor generator braking state. Once the brake motor fails, the expander speed will lose control and overspeed will occur. At this time, it is necessary to automatically open the protection and control system. The principle is that the speed measuring motor will send out the overspeed signal to cut off the three-way solenoid valve. The three-way solenoid valve directly controls the air open pneumatic butterfly valve at the inlet of the expander, so that the butterfly valve is quickly closed and the air inlet is cut off. At the same time, the rotation of the valve rod touches the stop and limit switch, so that the power supply of the expander motor is cut off and the safe shutdown is realized.
Dec 03, 2024
1. Before the overall large air separation unit cold test. Fractionation should be fully heated and blown out. Air turbine compressor, turbine expander, air pre-cooling system, molecular sieve purification system and electrical, instrumentation and control system must be ready for operation. 2、The operation of the cold test is carried out in accordance with the operating instructions of the large air separation unit, in order to cool the distillation tower, the main condenser and othe...
Mar 23, 2022
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