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What are the advantages of plate heat exchanger work?

What are the advantages of plate heat exchanger work?

  • Categories:Common problem
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  • Time of issue:2019-07-18 20:13
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(Summary description)In the plate heat exchanger leakage occurs, the medium in the plate heat exchanger leaks on the outer surface, unlike the tube heat exchanger, which occurs in a pair of permanent and secondary water, and is not easy to detect under normal conditions.

What are the advantages of plate heat exchanger work?

(Summary description)In the plate heat exchanger leakage occurs, the medium in the plate heat exchanger leaks on the outer surface, unlike the tube heat exchanger, which occurs in a pair of permanent and secondary water, and is not easy to detect under normal conditions.

  • Categories:Common problem
  • Author:
  • Origin:
  • Time of issue:2019-07-18 20:13
  • Views:
Information

Advantages of plate heat exchangers

1. The time required for starting and stopping the plate heat exchanger is short, and the operation is convenient, which is welcomed by the operation management personnel.

2. In the plate heat exchanger leakage occurs, the medium in the plate heat exchanger leaks on the outer surface, not like the tube heat exchanger, which occurs in a string of permanent and secondary water, and is not easy to detect under normal conditions. .

3. According to different loads, the number of plates and the number of passes can be combined, so the plate assembly is flexible. If the medium-sensing connecting plate or the intermediate partition is used, several heat exchangers can be installed on one rig to run different loads, which can reduce the pipelines, valve fittings and other equipment in the system, and reduce the construction cost and the floor space. benefit.

4. The plate heat exchanger is lighter in dirt because of the higher end flow between the plates, which causes the contaminated material to float. At this time, the heat transfer surface of the plate is very smooth, even if the dirt deposits on the plate, because there is no dead angle, the plate The surface is not easily corroded, and the turbulent flow helps the self-washing, flushing the dirt on the attached plate, and peeling off. At the same time, the flow between the plates, the space is small, so that the amount of medium retention is small, so the cleaning is simple and convenient.

5. The plate is small in size, so there is less heat lost to the kitchen environment. According to relevant literature reports, generally only the heat loss of the tube is about 1t5. At the same time, the plate type covers a small area, only 1/5 to 1/10 of the tube-type heat exchanger, plus the inspection and inspection of the tube-type heat exchanger core-pulling tube, the number is smaller, the weight is light, When the belt has the same heat load, the weight of the plate is only about 1/4 of the tube type, which brings convenience conditions for inspection cleaning and maintenance.

6. There are three main types of plate heat exchangers with high heat transfer coefficient. The raised plate, the corrugated plate and the herringbone plate are the most used in the heating field. The turbulent flow state can be excited at a low flow rate of 0.15 to 0.85 m/s, and the heat transfer coefficient is high on both sides of the plate. According to the relevant data, the plate heat exchanger has a Reynolds number greater than 50 to 200. The heat transfer coefficient of water to water is 15000~21000K/m2·h·°C, and the two tubes are only 3200~6300K/mh·°C. The data shows that the heat transfer coefficient of plate heat exchanger is tube type 2 ~ 4 times, and the pressure drop is close.

7. The heat resistance of the plate heat exchanger is small. The plate heat exchanger plate is generally made of alloy steel plate such as stainless steel plate or titanium plate. The general thickness gauge is 0.B~0.9mm. Due to the thin wall, the thermal resistance of the plate wall is reduced. Of course, it is also related to the strong turbulence of the slab, which causes the heat resistance of the surface of the heat exchanger to be small. According to the American Tender Heat Exchanger Manufacturing Association (TEMA) standard, the thermal resistance of the t-plate heat exchanger is determined. When the same medium is used, it can be selected according to the thermal resistance of the heat exchanger in the tubular heat exchanger. According to some other literatures, the thermal resistance of the plate heat exchanger is generally about 0.00012m·°C· htkcal. When designing, when the medium is condensed water or steam, the thermal resistance of the plate heat exchanger is 0.O0001m·°C·h/kcal, while the heat resistance of the heat exchanger of the tubular heat exchanger is 0.0001, which is 1: 10.

 

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