Fixed tube heat exchanger consists of tube bundle, tube plate, shell, head, folded plate, etc. Tube bundle ends fixed in the tube plate, the tube can be expanded (the inner hole of the tube with mechanical expansion, so that the tube wall from the inward to outward extrusion and fixed in the tube plate) or welded to the tube plate. The tube bundle is placed within the tube shell, with headers and flanges fixed at both ends. In this way, one fluid flows from the inside of the tube and the other from the outside. The space between the two heads and the tube plate is used to distribute or collect the fluids inside the tube. The two fluids do not mix with each other, but only exchange heat through the tube wall.
Advantages: simple and compact structure, high pressure resistance, low cost and easy to clean the tube side.
Disadvantages: Risk of blockage when the tube is damaged or needs to be replaced.
When the difference between the wall temperature of the tube bundle and the shell or the coefficient of linear expansion of the material is large, a large thermal stress will be generated in the shell and the tube bundle. A flexible compensation ring (also called expansion joint) should be installed on the shell to reduce the thermal stress.
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Recently, in order to celebrate the 92nd anniversary of the founding of the Party, all Party members and cadres of the Changyi City Transportation Bureau visited the Changyi City Clean Government Education Base. Copper can be used as a mirror, and ancient times can be used as a mirror. Through organizing visits to the anti-corruption education base, excavating and promoting the essence of clean government in the traditional Chinese history and culture, and transforming the cultural resources of honest administration into education resources will have positive and practical significance in advancing the construction of a clean government culture under the new situation and promoting anti-corruption work.
The Sub-Office of the Anti-Corruption Education Base and the Office of the Warning Education Department are divided into "Leader's Discourse", "Glorious Course", "Great Men's Style", "Bringing in the Future", "Models of the Times", "Ancient Officials", and "Clock of the Ancients" The seven-part content mainly shows the history of anti-corruption development since the founding of the Communist Party of China and the fruitful results achieved since the reform and opening up of the city in economic and social development and the construction of a clean and honest government. Through visits to exhibitions, all party members and cadres of education have firmly established the concept of the masses, further improved their awareness of honesty and diligence, and their awareness of honesty and self-discipline, built a ideological and moral defense line based on corruption, and consciously committed themselves to the people, pragmatic, honest, and empowered people. It is used for the sake of the people, for the benefit of the people, to vigorously promote the spirit of seeking truth and being pragmatic, and to closely focus on the development of the party's primary task of ruling and rejuvenating the country, to do a real job, clean and honest, and to create a new situation for the Changshu City traffic undertaking. Make new and bigger contributions.