SU293491A1 - Plate heat exchanger - Google Patents

Description

The invention relates to those exchangers used when working in corrosive environments and in the production of highly pure organic and inorganic substances.

Known plate heat exchangers containing a package of heat transfer plates mounted on the rods and sandwiched between the movable and fixed plates. The use of plastics for the manufacture of heat exchangers, such as fluoroplast-4, is known, but it is complicated by the poor weldability of this material and the presence of residual temperature distortions.

In order to intensify heat exchange and compensate for thermal deformations, it is proposed in a fluoroplast-4 plate heat exchanger that is heat resistant at temperatures from -250 to 260 ° C, which allows the use of heat transfer media that provide significant temperature gradients encountered in many chemical processes of chemical technology between the heat transfer plates carrying corrugated plates, having distribution channels in the upper and lower parts, and it is desirable to provide a mobile clamping plate with gases m damper embodied as a slide, bearing against it, and a flexible membrane secured to the plate

a disk forming a gas-tight sealed chamber with a membrane.

FIG. 1 shows a longitudinal section of a heat exchanger; in fig. 2 - section along AA

in fig. one; in fig. 3 is a section along BB in FIG. 2; in fig. 4 - gas compensator.

The heat transfer surface of the heat exchanger is made in the form of rectangular flat plates 1 with a thickness of 0.5-1.5 mm, which, together with alternating bearing corrugated plates 2 and 3 in the form of a package, are clamped between the fixed 4 and the movable 5 plates. The corrugations are located on both sides.

carrier plates, and on the first, designed for vapor-phase medium - vertically, and on the second - for heat-transfer fluids - horizontally. In heat exchange between two liquids, plates with horizontal corrugations are used.

In traverse 6, which is rigidly connected to the fixed plate with the help of two screws 7, there is a screw 8, the end of which rests on the end face of the slider 9 of the gas shock absorber placed in the movable plate and made in the form of a slider, a flexible membrane 10 made of rubber or fluoroplastic forming disc 11 sealed chamber 12 connected to the tank 13 with a liquefied gas, and resting the middle part of the slide, and the peripheral - on the discharge ring 14, which, depending on the position of the slide, interact with the conical end surface of the wedges 15.

During operation of the heat exchanger, a countercurrent of coolants in adjacent plates is carried out, when steam enters the upper channel 16 and is parallelly distributed through the channels 17 between the supporting plates 2 and heat exchange plates, from which condensate flows into the channel 18, and the cooling fluid passes through the lower channel 19 in the horizontal channels 20 between the heat exchange plates and the carrier plates 3, through the channel 21 leaves the heat exchanger.

The tightness of compacted joints between the plates and heat transfer plates is provided by a gas damper that maintains a certain specific pressure, for which the hermetic shock absorber chamber is filled with carbon dioxide from the tank and, when the diaphragm under pressure of the gas moves the slider to the extreme left position, the screw slider position.

In the event of a leakage temperature, leakage does not occur, since

By compressing the fluoroplastic, the movable plate under the pressure of gas in the hermetic chamber moves to the right.

The proposed heat exchanger allows to carry out various heat transfer processes with aggressive substances at temperatures from -200 to 250 ° C in some processes to exclude the use of platinum and other precious metals.

Subject invention

Claims (2)

1. A plate heat exchanger, for example, of fluoroplastic, containing a package of heat exchanger plates mounted on shtanga, movable and fixed clamping plates, characterized in that, in order to intensify heat exchange, support corrugated plates are fitted with distribution channels along the ends. 2. Heat exchange according to claim 1, characterized in that, in order to compensate for thermal deformations, the movement of the clamping plate is provided with a gas shock absorber, made in the form of a slide, a flexible membrane and a disk fixed in the plate that forms a gas-tight chamber with the membrane. 7 5 // 13 -G -№ :: Ш ±: & Psh mr FIG. one b.I iБ Vu 2 , f - i --- - - / -.- // yA-- :: fSK ffy. .:,. lf t f rtni Rig 3 15