Issues related to coiled tube heat exchangers
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I searched the Internet for information on coiled-tube heat exchangers and learned that they have advantages such as high heat exchange efficiency and low pressure drop. I now have a new project that requires a condenser, which is to be used in front of a dry vacuum pump. Can a coiled-tube heat exchanger replace a horizontal shell-and-tube condenser?
If condensation is carried out using a coiled tubular heat exchanger, how is the shell-side condensate removed? Will it be drawn into the vacuum pump?
This post was last edited by CHANGBAISHI on 2021-5-15 at 15:45. It’s best to clarify the relevant data and provide simple diagrams to facilitate discussion. These types of heat exchangers all belong to the partitioned-type heat exchange category; the specific choice depends on your application. In terms of the application, it’s not a medium under high pressure, so it seems unnecessary to use this type of winding design; for reference only.
Since the spiral-wound tubular heat exchanger is composed of many tightly wound tubes with very small diameters, it is necessary to consider whether this will affect the pumping capacity of the vacuum pump. . .
Can’t this thing be calculated? See if there are any manufacturers, and have them do the calculations
Coiled tube heat exchangers have high heat transfer efficiency, but they are prone to scaling and require clean fluids. If there is enough space at the construction site, it’s better to use shell-and-tube exchangers – they have lower costs and are easier to repair
The general process is to ensure that the low-boiling substances in the vapor phase are condensed as much as possible
The key is to ensure that the cooling water is demineralized water; otherwise, scaling is likely to occur. In terms of oil and gas recovery using the condensation method, we use coiled-tube heat exchangers for the evaporator of the first-stage compressor, and the results are quite good. Compared to shell-and-tube heat exchangers, they are smaller in size and cheaper, and they do not fall under the category of special pressure vessels. Also, does the gas that needs to be condensed contain water? If it does, it’s better to use a two-channel design for the heat exchanger used as a coolant; in case of ice blockage, the other channel can be switched to, and the heat exchanger affected by the ice blockage can be thawed.
1. It will affect the exhaust volume. II. Excessive water content can lead to ice blockages, and a high freezing point also has an impact.
Thank you for your valuable advice. Water is indeed present in exhaust gases, and it is indeed necessary to consider designing a backup route