Floating ring seals also have two major drawbacks: (1) the internal leakage is large, and the equipment for recycling the leaked oil (soil) is complicated and large, including oil and gas separators, degassing tanks and control systems. Especially when the internal leakage is too large and the system fails, there is a danger of the sealing oil polluting the process circuit. The result is to reduce the product quality and even poison the catalyst until the device is shut down; (2) the oil pressure difference of the floating ring seal is small, The control system is complex. The investment in the floating ring seal assist system is much higher than the investment in the seal itself. It is precisely because of the above two major shortcomings of the floating ring seal that the normal operation of the unit is affected. The steam blockage seal steam blockage seal is a modified version of the labyrinth pumped air seal that injects steam directly into the machine and draws it with steam. Using steam blocking and sealing, it can be done: (1) zero leakage outside the medium, no environmental pollution; (2) non-contact sealing operation, high reliability and long service life; (3) simple structure and convenient operation; (4) The use of steam as a sealing gas is easy to obtain, inexpensive, and economically significant.

There are three main problems with sealing. (1) The large amount of leakage and poor economic efficiency are inherent defects of the labyrinth seal. The water vapor entering the machine accounts for about 0.5 to 1% of the total mass flow of the compressor. In fact, the water vapor is not required for the process, and the power consumption of the compressor is increased in vain after entering the machine. This means a drop in compressor efficiency. (2) After the superheated water vapor enters the machine, it will condense into water in the low temperature zone (such as the intercooler), and the acid gas such as hydrogen sulfide existing in the process gas will generate more corrosive acid when it meets the water, and the equipment will be intensified. Especially the corrosion of the intercooler. The decrease in equipment life caused by acid corrosion will not appear in the short term, but after a long period of time, the degree of damage may be more serious than the economic loss described above, especially after the intercooler is corroded and perforated. Contaminants and further corrosion of other equipment that uses recycled water. (3) The pumping strength is difficult to control. If the pumping strength is too small, the bearing oil will enter the water; if the pumping strength is too large, the bearing oil will be pumped away. More serious problems with process gas contamination of bearing oil and the atmosphere can occur.

Square Vacuum Light Box

Blister light box is a luminous light box composed of LED light bars and acrylic panels. It is characterized by its unique vacuum shape, more attractive than the LED light box symbol on the plane, and more three-dimensional.The blister light box adopts the three-dimensional luminous character processing technology. Due to the stable quality of acrylic, its products are characterized by good light transmittance, clear farsightedness, high compressive strength, colorfast for more than ten years, and bright as new, which are incomparable with other light boxes and metal characters. It is the best choice for businesses with sustainable business and strong strength.

The square Vacuum Light Box is the most common one, which can be used as a blank light box, UV screen, or an inner screen, logo.

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