Energy saving and emission reduction of air separation equipment

Under the design working condition, the positive and return air volume of the Heat section of the switching heat exchanger (or cooler) is basically equal. While in the cold section, the return flow volume must be larger than the positive flow air volume, and keep a certain proportion relationship, so that the temperature difference of the cold end is within the required range of moisture and carbon dioxide self-elimination, and the temperature difference of the hot end should be appropriate. In actual operation, when the temperature condition fluctuates, the method of changing the air volume or the distribution of product gas volume is also often used to adjust. When the middle temperature deviation occurs between two groups of switching heat exchanger (or between two groups of refrigerators), air inlet stop valve (or thin film butterfly valve) can be used for adjustment. The group with lower temperature in the middle part is larger, increasing air ventilation. In this way, the requ...

There are many types and types of low temperature valves. Now taking the low temperature stop valve as an example, the common failures can be divided into three categories: the first category: the failures occurring on the top of the valve. The valve top (valve head) of this kind of valve is connected with the valve stem by movement, so that when the valve is closed, the two sealing surfaces can be "corrected automatically ". After long-term use, sometimes the lock nut is loosened due to the damage of anti-back gasket, and finally the top of the valve falls off when opening the valve. At this time, the valve will lose its function of closing. Sometimes the damage of the lock nut is caused by the improper material and the replacement of cold and fragile metal. Another common fault is that the valve top is not closed strictly, that is, the valve leaks. The common reason is that the sealing surface of the valve top and the valve seat is crushed by hard objects (such as hard objects suc...