Plate structure of spiral plate heat exchanger
At present, the spiral plate heat exchanger equipment adopts the plate structure form, in most cases, it will be mainly herringbone waviness, from this point of view, in fact, it is a typical network flow plate structure, which is characterized by the fluid channel formed between the plates, the wrong line is full of contacts, the fluid around these contacts form a spiral forward orbit, at this time will produce strong disturbance.
The design of the spiral plate heat exchanger on the plate, if increase the fluid flow degree, the actual use, can also reduce the thickness of the bottom layer of laminar flow, effectively improve the convective heat transfer coefficient without phase transition, so as to achieve the purpose of increasing the heat transfer coefficient.
Murphy experts proved by experiments that for water medium, when Re=20 ~ 200 and the flow rate is 0 2 ~ 0 5m/s, the fluid enters the turbulent state and has a high heat transfer coefficient. For this reason, the contact points are arranged evenly and randomly on the plate, and the spacing is reduced appropriately, which can not only greatly strengthen the overall stiffness of the plate, but also bear a large pressure difference.
Design of spiral plate heat exchanger equipment on sealing gasket:
Sealing gasket is an important part of the spiral plate heat exchanger equipment, at the time of assembly should pay attention to use glue to stick gasket first prison in plate seal groove, and, in the middle of the slot hole weeks at this time also will be based on the fluid flow need to place the gasket, so to allow or prevent fluid into the channel between sheets, achieve the goal of heat exchange.
Sealing gasket material, structure and compression ratio are directly related to the sealing effect of spiral plate heat exchanger equipment. At present commonly used sealing gasket materials mainly include synthetic rubber and asbestos rubber two categories. Synthetic rubber is commonly used to include nitrile butadiene rubber, epdm and fluoro rubber. The physical performance index of synthetic rubber gasket mainly includes compression deformation and elongation at break under working conditions, and the hardness index of rubber gasket should be determined according to the form of sealing groove and compression amount
The design of the spiral plate heat exchanger on the plate, if increase the fluid flow degree, the actual use, can also reduce the thickness of the bottom layer of laminar flow, effectively improve the convective heat transfer coefficient without phase transition, so as to achieve the purpose of increasing the heat transfer coefficient.
Murphy experts proved by experiments that for water medium, when Re=20 ~ 200 and the flow rate is 0 2 ~ 0 5m/s, the fluid enters the turbulent state and has a high heat transfer coefficient. For this reason, the contact points are arranged evenly and randomly on the plate, and the spacing is reduced appropriately, which can not only greatly strengthen the overall stiffness of the plate, but also bear a large pressure difference.
Design of spiral plate heat exchanger equipment on sealing gasket:
Sealing gasket is an important part of the spiral plate heat exchanger equipment, at the time of assembly should pay attention to use glue to stick gasket first prison in plate seal groove, and, in the middle of the slot hole weeks at this time also will be based on the fluid flow need to place the gasket, so to allow or prevent fluid into the channel between sheets, achieve the goal of heat exchange.
Sealing gasket material, structure and compression ratio are directly related to the sealing effect of spiral plate heat exchanger equipment. At present commonly used sealing gasket materials mainly include synthetic rubber and asbestos rubber two categories. Synthetic rubber is commonly used to include nitrile butadiene rubber, epdm and fluoro rubber. The physical performance index of synthetic rubber gasket mainly includes compression deformation and elongation at break under working conditions, and the hardness index of rubber gasket should be determined according to the form of sealing groove and compression amount
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