Air separation parts FAQ

The world's iron and steel industry has experienced several revolutions. Around 1865, the air side blowing converter steelmaking method and flat furnace steelmaking method appeared in Britain, and then the flat furnace replaced the side blowing converter. In order to strengthen the flat furnace smelting, then adopt the oxygen blowing operation. After Austria invented the oxygen top-blown converter steelmaking method (LD method) in 1952, the world steel industry has entered a period of rapid development. With the great leap of iron and steel industry, oxygen generator is developing towards large scale rapidly, and oxygen and steel are closely connected. After Austria, the United States is the first country to adopt oxygen top-blown converter in the world. Japan has introduced this technology and developed it vigorously since 1957. Within only ten years, the steel production has soared from 10 million tons to 0.1 billion tons. Its development speed is so fast, and the proportion of ox...

In the normal operation of the crude argon Tower, sometimes the resistance drop, the argon content drop and the oxygen content increase of the crude argon tower will happen suddenly, and the normal operation condition of the crude argon tower will be destroyed, it is called "nitrogen plug" working condition of crude argon tower. The direct reason for the "nitrogen plug" of the crude argon Tower is that the nitrogen content of the argon distillation in the upper tower exceeds, and generally the nitrogen content should not exceed 0.1%. This is because the separation of oxygen and argon is conducted in the crude argon Tower, and most of the oxygen in the argon distillation is condensed in the rising process, while the nitrogen component of low boiling point is not condensed, and all of them are left in the crude argon, making the nitrogen content in the crude argon be dozens of times larger than that in the argon distillation. The heat transfer temperature difference of the crude argon...

What should be paid attention to when operating liquid oxygen and liquid nitrogen evaporators in air separation equipment

What are the respective proportions of cold loss and incomplete heat exchange loss in the total cold loss of air separation equipment

Before the automatic valve is installed in the automatic valve box, it must be disassembled and washed clean, and the oil must be removed with clean alcohol. If it has been used, the automatic valve must grind the sealing surface, and then test the pressure with special tools. According to the manufacturing requirements, the leakage is less than 0.1L/min under the pressure of 0.6MPa. In actual work, kerosene leakage detection or soap water leakage detection can be used. Install the automatic valve in special tools first, put the pressure of 0.6MPa into it, and stop the pressure for 3 min. The standard of air leakage is: no more than 6 soap bubbles with a diameter of 40mm should be blown out within 3 minutes. The automatic valve that has passed the pressure test should be equipped with Open pin for standby. Special attention should be paid to the use of low temperature resistant brass or stainless steel products for the opening pin, and ordinary opening pin should not be used casuall...

Why does the air separation equipment require inflation before starting the water pump when starting the air cooling tower

What is dew point in air separation equipment and why can dew point be used to represent the moisture content in the air?

Before filling the molecular sieve, check that the sieve bed can not leak the molecular sieve, otherwise it should be handled. Oil and other sundries are not allowed in the tank; people who take part in the filling are not allowed to wear working shoes with nails in order to avoid stepping on the sieve bed; people should wear clean work clothes without oil. Several standard height marks should be made in the middle part, first check the ring chamber, and fill the aluminum glue to reach the standard height, then fill the molecular sieve. Due to the large amount of molecular sieves, the secondary output of molecular sieves in different kilns is generally different. Therefore, the molecular sieves of the same batch of kilns should be evenly filled with two molecular sieves. After the filling is completed, use the flattening mechanism to flattening first, and check whether the filling of the molecular sieve reaches the standard height (the molecular sieve has been buried below in the ri...

Core tips: answer: (l) the general requirements of reforming the high oil tank l) reforming the lubrication system of the centrifugal air compressor, the key equipment in the system of air separation plant. After transformation, centrifugal air compressor suddenly encountered emergency power outage, etc.

What is the difference between full heating of air separation equipment in the cold state and in the hot state, and what is the difference in the operation method?

Switching valve (forced Valve) is a pneumatic switching valve installed on the hot end of switching heat exchanger (or cooler. The switch of the switch valve is controlled by the signal compressed air through the solenoid valve. According to the different functions in the process, there are air, sewage and nitrogen switching valve, pure nitrogen suppression valve, sewage and nitrogen three-way valve, etc. It can be divided into vertical and horizontal structures. Vertical switch valve can be divided into air open type and Air closed type. Air open type means that when the signal compressed air is cut off, the valve flap can open automatically depending on its own weight; otherwise, it is gas closed type. The selection of gas on and off is determined by the safety of the device. Nitrogen switch valve uses air open type, air switch valve uses Air closed type. Since the movement of the switch valve is controlled by the solenoid valve, in addition to the choice of open gas and closed ga...

At the beginning of starting the full low pressure oxygen generator, all the air entering the equipment is inflated through the expander, while the total expansion volume of the expander (including the standby) set by the equipment is much smaller than that of the air compressor. In addition, at the beginning, the intake temperature of the expansion machine is much higher than the design value, and the actual air volume that can enter the expansion machine is less than the design expansion volume. Therefore, there must be a part of air to be emptied first, in order to avoid the air compressor overpressure or surge. When the liquid begins to accumulate, air is sent to the lower tower, then through the throttle throttle to the upper tower, and then combined with the expansion gas to the heat exchanger to recover the cooling. However, at the beginning, the air that can be eaten in the air separation tower is very small, because the liquid air, liquid nitrogen pipeline and regulating va...