The exhaust gas temperature after gas compression is an important parameter for safe and reliable operation of the compressor. The model of the methyl ethyl ketone unit hydrogen compressor is DW-10.5/30, which is a symmetric balanced piston three-stage compressor with a rated outlet pressure of 3.0 MPa. This compressor has excessive exhaust gas temperature during the initial use of the unit. Phenomenon, the device can not run smoothly for a long time. According to the actual operating conditions, the cause of hydrogen temperature rise was analyzed, and the modification was carried out accordingly, and satisfactory results were obtained. Pre-retrofit operation The gas phase sec-butanol is catalytically reacted to obtain methyl ethyl ketone, hydrogen and the remaining sec-butanol in the gas phase, and the mixture enters the cooling separation system. The sec-butanol and methyl ethyl ketone are cooled, liquefied, separated and purified to obtain methyl ethyl ketone product, and the remaining hydrogen is introduced into the compressor to be pressurized to 2.5 MPa and then removed to the hydrogen purification system. According to the design capability of the device, the daily hydrogen treatment capacity is 2.0t. After each stage of compression, the hydrogen gas is cooled by heat exchange and then enters the next stage of compression.
The hydrogen compressor design has a gauge pressure of 115e at the tertiary outlet. The three outlet temperatures in the initial operation are 118e, 120e, and 125e, respectively, which are higher than the allowable upper temperature limit of the equipment. Due to the excessive temperature rise of the compressed hydrogen gas, the outlet temperature is too high, so that the compressor cannot run smoothly, which affects the stability of the entire device. Reason analysis The temperature rise of the gas in the compressor can be considered as adiabatic process. The heating process follows the thermodynamic law. In the analysis, the hydrogen is calculated according to the ideal gas compression. Compressor primary compression cylinder inlet hydrogen absolute pressure is 0.20MPa, outlet absolute pressure is inlet temperature is 5e. According to the adiabatic compression final temperature formula T(k-1)/k, the theoretical outlet temperature is 85.3e for the cylinder internal gas calculation. Similarly, the compression outlet temperature is reduced at all levels.
Nylon cage Self-aligning ball bearings are one type of Self-aligning Ball Bearing. Include two rows of balls, the ATN nylon cage, the inner ring, and the outer ring with a common concave sphered raceway. Self-aligning Ball Bearing have a sphere raceway in the outer ring and a double raceway in the inner ring. This feature give the bearings their self-aligning property, permitting angular misalignment of the shaft relative to the housing. Nylon cage self-aligning ball bearings are therefore particularly suitable for applications where misalignment can arise from errors in mounting or from shaft deflection. Double row self-aligning ball bearings are mainly used to carry radial loads and light axial loads, but cann't carry pure axial loads.
Feature:
Mainly bear radial load, and can bear smaller axial load. Axis (shell) axial displacement limit in the clearance limits, the heart performance is automatically adjusted, normal work allows the inner and outer relatively small tilt conditions, suitable for bearing hole can not strictly ensure the concentricity. Self-aligning ball bearings are consequently self-aligning and insensitive to shaft deflections and angular misalignment of the shaft relative to the housing, It is particularly suitable for applications where considerable shaft deflections or misalignment are to be expected.
Main Application
Owning to its specific structure, the self aligning ball bearing can be used in some relative field and some general lines.For example, Self-Aligning Ball Bearing applies to carry heavy load and impact load. Mine machine, port hoisting machine, port transfer equipment.
Main Models:
1308ATN – 1316 ATN Nylon Cage Self-aligning Ball Bearing
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