Gasket type and fixing of plate heat exchanger

Plate heat exchanger is composed of many stamping corrugated plates at certain intervals, all around through the gasket seal, and pressing frame and overlapping spiral pressed plate and a gasket, the angle of the four hole forming fluid distributing and collecting pipe, and reasonably cold and hot fluid separately, which were flowing in on both sides of each runner plate, through the heat exchange plate. The seal of the plate heat exchanger is mainly divided into adhesive seal and non adhesive seal.

Bonded seal. Prior to bonding, steam and air flow should be used to completely remove the adhesive residue and the residual gasket. In the case of flexible seal, it is necessary to use the residual binder and residual gasket on the plate surface. Bond in large quantities, the pool should be prepared to seal the liquid nitrogen frozen, ready for the heating furnace with a plate heat exchanger gasket for drying, heating temperature should be 160 degrees.

Non adhesive seal. Under the condition of high temperature, the service life of the plate heat exchanger can be increased by 1 times to about 2 times because of the corrosion of the rubber plate. The utility model has the advantages of convenient maintenance, no bonding, no labor intensity, and low maintenance cost. At the same time, avoid the adhesive pad to prevent the rubber pad in the groove sliding, can improve the use of pressure 6 kg. The sealing operation procedure is the first step on, the sealing ring in place; the second step is to put in, the sealing ring is correctly into the sealing groove; the third step is pressed into the sealing groove, a groove shaped structure cross section decreases gradually, so that the sealing ring is positioned correctly.

Plate heat exchanger should be cleaned with chemical cleaning agent, such as acetone. Also, must also use chemical cleaning agent to remove adhesive in the sealing gasket softener and anti adhesion coating. The adhesive is applied in the middle of each bonding surface. Depending on the width of the gasket, the width of the binder is about the width of a match, and then the adhesive is evenly distributed on the whole bonding surface with a brush, so as to make full use of the whole bonding surface. Depending on the type of binder, wait for a certain amount of drying time, and then put the seal. Each plate heat exchanger is stacked together, with the tension screw tension, or with heavy pressure on the stack of heat exchanger group. Depending on the type of binder, the hardening time is about 8 h ~ 20 h. In order to reconcile the binder, screw tightening and furnace hardening.