Due to the special effect of the corrugated surface of the plates, the spiral plate heat exchanger causes the fluid to flow along the narrow and curved channel, and the direction of its speed continuously changes, causing the fluid to flow at a small flow rate (Rc= 200 hours), arousing strong end motion, thus accelerating the destruction of the fluid boundary layer, strengthening the heat transfer process, and effectively improving the heat transfer capacity.
And it has the outstanding advantages of compact structure, low metal consumption, high operational flexibility, low heat loss, convenient installation, inspection, disassembly and cleaning, strong corrosion resistance, and long service life. The heat exchanger process is composed of many plates assembled according to certain processes and technical work requirements of the buyer.
During assembly, plates A and B are arranged alternately, and a mesh channel is formed between the plates. The four corner holes form distribution pipes and converging pipes. The sealing gasket seals the hot and cold media in the heat exchanger, and at the same time Reasonably separate hot and cold media without mixing. In the channel, hot and cold fluids flow at intervals, either countercurrent or downstream. During the flow process, the hot and cold fluids undergo heat exchange through the plate wall.
There are many process combinations of spiral plate heat exchangers, which are realized by using different reversing plates and different assemblies. The process combinations can be divided into single process, multi-process and vapor-liquid exchange process. , mixed process form.
Extended information
1. The nominal pressure PN of the spiral plate heat exchanger is 0.6, 1, 1.6, 2.5Mpa (i.e. the original 6, 10, 16, 25kg/cm) (Referring to the maximum working pressure of a single channel) The test pressure is 1.25 times the working pressure.
2. The materials of the parts in contact with the medium of the spiral plate heat exchanger are Q235A and Q235B for carbon steel and SUS321, SUS304 and 3161 for stainless steel acid ports. Other materials can be selected according to user requirements.
3. Allowable working temperature: t=0-350℃ for carbon steel. The t of stainless steel acid steel is -40-500℃. The temperature rise and pressure reduction range is in accordance with the relevant regulations of pressure vessels. When selecting this equipment, appropriate process calculations should be made to make the fluid in the equipment channel reach a turbulent state. The equipment can be placed horizontally or vertically, but it can only be placed vertically when used for steam condensation; when used in the caustic soda industry, the overall heat treatment must be carried out to eliminate stress.
4. When selecting equipment, appropriate process calculations should be carried out to make the liquid in the equipment channel reach a turbulent state (general liquid speed ≥0.5m/s; gas ≥10m/s).
5. The equipment can be placed horizontally or vertically, but it can only be placed vertically when used for steam condensation.
6. When used in the caustic soda industry, the overall heat treatment must be carried out to eliminate stress.
7. When the flow value difference on both sides of the channel is large, unequal spacing channels can be used to optimize the process design.
Baidu Encyclopedia - Spiral Plate Heat Exchanger
Baidu Encyclopedia - Spiral Plate Heat Exchanger Group