Manufacturing Technology of Double Tube Sheet Heat Exchanger
Double tube plate is a relatively common structure in heat exchangers in recent years. In order to avoid mixing of the two media in the tube side and the shell side to cause the material to be scrapped or cause a major accident, the double tube plate structure is generally adopted. During the hydraulic test of the equipment, the inner tube sheet leaked, which was difficult to rework, which would cause the equipment to be reworked. Therefore, the difficulty in manufacturing the heat exchanger with this structure was mainly the expansion of the inner tube sheet. If there is no experience in expansion of the same material and specification, expansion simulation test should be done to determine the expansion parameters.
Controlling the processing of the tube sheet during the equipment manufacturing process must meet the accuracy requirements of the tube holes, especially the inner tube sheet tube holes and expansion grooves. At the same time, focus on details such as heat exchange tube polishing and tube bundle assembly sequence. Ruikai Chemical has strictly implemented the above requirements during the manufacturing process of the double tube plate heat exchanger, and has completed the design of the 1.0 MPa, 2.0 MPa, 3.0 MPa, 4.0 MPa, and 5.0 MPa double tube plate heat exchanger samples in the test site. And the manufacturing test, the material is S31603, S30408 two kinds of materials, the heat exchange tube specification is φ25*2,,50*3, so that the equipment production can be completed smoothly and meet the needs of customers.
The key equipment of the process is shown in the figure, and the details are shown in the table below:
The concentricity and verticality of the inner and outer tube sheet tube holes and expansion grooves are the key points in the manufacture of the double tube sheet heat exchanger, and the strength expansion of the inner tube sheet is the difficulty in the manufacture of the double tube sheet heat exchanger. The manufacturing process must be strictly controlled. Through the efforts and exploration of process technicians and workshop workers and operators, we have accumulated experience in the manufacture of double tube sheet heat exchangers. One of the equipment has passed the test verification of process samples, and the maximum pressure of the shell side can reach nearly 10 MPa, which is much higher than the drawing. The required 5.1MP, the batch of equipment has been successfully manufactured at one time and has been operating normally.
Major customers in recent years:
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