Working principle and technical advantage of plate heat exchanger

1, plate heat exchanger

The detachable plate heat exchanger is a kind of heat exchanger with compact structure and high heat exchange efficiency. The processing and handling of detachable plate type heat exchanger is mainly used in the original milk, because it has the characteristics of small volume, easy disassembly and cleaning, soon widely used in food processing, beverage processing, chemical processing, beer. The plate heat exchanger is composed of a group of metal corrugated plates. The metal plate is mounted in a frame and clamped by a clamping stud. I believe that when the plate is installed upside down 180 degrees, forming a channel. The plate is provided with a sealing gasket, the liquid passage is completely lifted, and the liquid flow is led into the flow passage of the people to prevent the mixing of different mediums. The plate group is fixed by a fixing plate and a pressure plate, and is clamped by a clamping screw rod. In order to achieve a better heat transfer effect, the hot and cold medium in the heat exchanger is usually designed to counter flow. Each plate of AI Reed has at least two plates, and the heat transfer and pressure drop of the heat exchanger can be integrated by using the technology of thermal mixing. The inner bypass, the double channel technology and the unequal flow cross section assembly provide the perfect solution for the two sides of the medium flow rate difference. ARD plate heat exchanger has AB series, AM series, AL series, AP series, AS series, such as several large series of more than one hundred kinds of plates. Various models have deep ripple, shallow ripple, large angle, small angle, fully meet the needs of different users, special conditions can be designed and manufactured according to user needs.

2, board characteristics:

By using the numerical simulation technology and the precise experimental measurement method, the heat exchange plate with superior flow and heat transfer performance is designed. The plate can produce high turbulence and high heat transfer coefficient at low flow rate. Compared with other manufacturers, under the same conditions, the plate has a smaller drag coefficient under certain heat transfer coefficient. As many as thousands of contact points are formed between the corrugated sheets. The pressed plate has a very high precision, which makes the contact point between the plates even pressure, so as to withstand the pressure of up to 2.5MPa. Import plate design with the streamline Triage area guide, it has the difference between different flow channel function, the fluid flow and heat transfer in the plate region of uniform distribution, so as to avoid the decline of the heat transfer efficiency of uneven flow distribution and flow angle caused by pitting corrosion and scaling problems.

3, sheet material:

Stainless steel：

Material grade 1.4301 (AISI 304)

Material grade 1.4401 (AISI 316)

Material grade 1.4439 (AISI 317)

Material grade 1.4404 (AISI 316L)

Material grade 1.4462 (ASTM S32205 or duplex 2205)

Material grade 1.4539 (AISI 904L)

Material grade 1.4529 (corresponding to AVESTA 254 SMO)

Special alloy

Hastelloy alloy C-276, D-205

Industrial pure titanium TA1-A (ASTM B265 Gr.1)

Ti Pd alloy Ti-Pd

Other Monel alloy, Intco alloy, tantalum (Monel Incolnel Tantalum)

4, sealing gasket:

Gaskets are made of internationally renowned manufacturers of raw materials, and has a very long service life. In the hot and cold fluid between the two seal, the middle of the leak area. Regardless of whether the internal seal of the cold fluid or the hot fluid is damaged, the leaked fluid flows through the leak area from the leak hole of the specially designed sealing gasket to the outside world without mixing with each other. The convex section of the unique design makes the whole plate group stuck to each other when clamping, so as to avoid the dislocation and greatly enhance the sealing performance. The installation is divided into three ways: adhesive, embedded and hanging buckle type.

Gasket materials are mainly:

Nitrile rubber (NBR) temperature range of -15 DEG -110 DEG, strong applicability, can be used for water, sea water, mineral oil and brine; three EPDM (EPDM) temperature range of -25 DEG -150 DEG, suitable for food, beverage and other clean system, high temperature resistance, can be used for hot water, steam, acid and alkali hydrogenated nitrile rubber; (HNBR) -30 temperature range of -150 DEG C, high temperature resistance, suitable for high temperature oil; fluorine rubber (Viton) temperature range of -25 DEG -250 DEG, high temperature resistance, there is resistance to chemicals, suitable for acid and alkali, fluid.

5, plate heat exchanger technical advantages and characteristics

Economy: low investment, low operating costs, low maintenance costs

High heat transfer coefficient: the total heat transfer coefficient is about 3--5 times of the shell and tube heat exchanger

Asymmetric flow design meets the requirements of cost reduction

Highly turbulent self cleaning effect

Increase or decrease the plate to meet the requirements of process change

Medium mixed possibility is small, out of effect safety

Easy to maintain and clean

Compact structure, medium consumption, light weight