Heat exchange area [Weekly Topic] December 2012 (4): What heat exchangers do you use, and what are your experiences with their operation?
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This post was last edited by Miaomiao is beyond ordinary on 2012-12-31 22:12. Topic of this issue: What type of heat exchangers do you use, and what are your experiences with them? Precautions: 1. Purpose: To further enhance mutual understanding of each other’s work and areas of expertise ； 2. Effective participation comes with financial rewards ； 3. Be sure to set the reply to be visible when replying; otherwise it will be deleted ； 4. Topics for each week are being sought in the heat exchange area; if you have any good suggestions, please visit http://bbs.hcbbs.com/thread-1068180-1-1.html ； 5. To encourage more marine enthusiasts to participate in the exchange area and to enhance their understanding of heat exchange equipment, this area will select outstanding and representative posts from the weekly topic submissions for publication. Enthusiastic participants are welcome to keep contributing. Below is a basic scope for discussion: regarding the type of heat exchanger you use and the operating conditions, it would be great if you could share your insights. Those who wish to help others are encouraged to provide detailed information; those interested can also leave their contact details for future use. There’s no need to hide.
This post was last edited by upcaa on 2013-1-1 11:24. We used shell-and-tube heat exchangers in our previous designs, but now we use plate heat exchangers. It seems that plate heat exchangers have a relatively high efficiency. Current operating condition of the plate heat exchanger: preheater for air and flue gas ； Materials containing solid particles ； Wait.
Our company’s small chemical plant primarily uses shell-and-tube heat exchangers; in 2010, two plate heat exchangers were installed. By the fall of 2012, one of those plate heat exchangers started to leak, and it was difficult to repair. I don’t have a very good impression of plate heat exchangers.
We use shell-and-tube heat exchangers, as well as plate heat exchangers. It seems that plate heat exchangers have a relatively high efficiency. The plate heat exchangers of German origin introduced by our factory have a higher efficiency than those made in China.
We all use them; plate exchangers are not as reliable as shell-and-tube exchangers. High requirements for operating environment, temperature, and medium
There are many types of heat exchangers available, but the most commonly used one is the tubular heat exchanger. Devices such as condensers, coolers, and reboilers primarily rely on tubular heat exchangers. Tubular heat exchangers are used in a wide range of applications and are very common. Plate heat exchangers are also widely used. The plate heat exchangers I have used are primarily employed in the production of thermal phosphoric acid from yellow phosphorus; when yellow phosphorus burns, it produces phosphorus pentoxide and releases a large amount of heat. Plate heat exchangers are used to remove this heat through circulating cooling water. They are convenient to use, easy to maintain, and offer high thermal efficiency as well. Double-tube plate heat exchangers have been used in phosphorus trichloride production plants. Since phosphorus trichloride can explode when it comes into contact with water, double-tube plates are employed to prevent such explosions caused by leakage of phosphorus trichloride, thereby enhancing the intrinsic safety of the plant. Spiral plate heat exchangers have also been used; they are typically employed in situations where the fluid is quite dirty. In the event of blockages, the resistance increases and the flow rate rises, which helps to wash away the obstructing debris, giving them a self-cleaning function. For reference only!
We specialize in the design and manufacture of heat exchangers; we have not used them before, and our main focus is on shell-and-tube heat exchangers.
We are shell-and-tube heat exchangers. It was selected based on the design requirements; its efficiency meets the process needs. The medium is propylene vapor (containing particles), and the biggest problem is tube blockage. Cleaning is done by the cleaning company using high-pressure spray guns.
Plate heat exchangers have relatively high heat exchange efficiency, occupy less space, and are easy to maintain and replace. However, they require high cleanliness of the fluid passing through them, are prone to clogging, and are also susceptible to leaks under conditions of high temperature and pressure. Tubular heat exchangers can be used in a wide range of operating conditions, but they are difficult to maintain; the main problems lie in leaks at the tube ends and the sealing surfaces. Air-cooled heat exchangers are mainly used in areas with water shortages. They are expensive and require a large amount of space; the main problem is that the fins tend to scale, which reduces the efficiency of heat exchange.
For the coolers or heaters used in our chemical production processes, spiral plate heat exchangers are commonly used; plate heat exchangers are used in some cases, and a small number of shell-and-tube heat exchangers are also utilized. As mentioned above, each type seems to have its own advantages
In the production process of polyacrylic acid, tubular heat exchangers were replaced with plate heat exchangers, and there have been no leaks in 2 years.