This kind of cooler are bi-metal
rolling compound fin tube type heat exchanger, it is composed of casing、tube bundle、tube box and
separator and so on. The specific heat exchanging process is as follow：After heat
air flow into gas inlet connect piping, and then swerve to cross outside of the
fin, and exchange heat with cooling water in the pipe. Cooled air is separated
into oil and gas through separator, and then it flow out to circle from gas
outlet tube via turning, thereby complete two courses
of heat exchanging and separation. Due to process air flow through tube bundle,
its pressure lost will be smaller than traditional baffle plate heat exchanger.
The casing of bi-metal rolling compound fin
tube type heat exchanger is composed of
front-end plate、barrel、gas inlet connecting and flanges、gas outlet connecting and flanges、rear-end plate、saddle、seal plate、slide
way and so on. Front-end plate is rotundity with square hole opened on it,
where the tube bundle thrust into casing. It has advantage of strong capacity
of bearing inner pressure and simple manufacturing. Gas inlet and outlet
connecting are arranged separately at two sides of barrel. Connecting flange
adopt loose flange，which can settle problems such as
centering in course of piping installation. Rear-end plate often adopt
rotundity slab, the heat exchanger with bigger diameter or bearing bigger
pressure also can adopt ellipse head. The saddle adopted by this suites of
inter-stage cooler is spring pedestal，which
can remove temperature difference stress existing in the course of working of
inter-stage cooler and portion axial\radial stress in piping. Seal plate is divided into upper spacer、lower
spacer、rear spacer. The material of seal bar
is silicon rubber, due to seal bar is easy to damage, we make the connection
between seal bar and spacer design into bolt connection. After seal bar meet
the tube bundle, it separate casing into two portions that is gas inlet and
outlet so that succeed to prevent gas is short circuit. The design of slide way
by our company is replaceable type. It is better to settle the problem of
replacing. Condensation water exhaust outlet is set at the end of casing, where
the condensation water flow out from head exchanger.
The tube bundle of bi-metal rolling compound fin tube type heat
exchanger is composed of heat exchanging tube、tube
sheet、upper and lower side plate and wheel
assembly etc. heat exchanging tube adopted bi-metal rolling compound fin tube.
Tube sheet adopted compound tube sheet material. For processing precision of
tube hole, it should be according to GB151. Connection of tube sheet and heat
exchanger adopt welding structure. Between tube sheet and upper & lower
side plate adopt bolt connection. Upper & lower side plate can be taken out
in course of checking and repair for the purpose of washing completely for tube
bundle. Channel steel and reinforcement strip on upper & lower side plate
are playing the strengthening rules. In additional, the surface of channel steel
contact with seal bar of upper & lower spacer to come true seal structure.
Sliding unit of this heat exchanger adopt structure of wheel and slide way for
assembling easily, wheel assembly and lower side plate adopt bolt connection
for replacing in time.
Tube tank of bi-metal rolling compound fin tube type heat exchanger
divided into fore-tube tank and rear-tube tank. Number of water-circle need to
confirm according to the request of casing diameter and heat-exchanging. In
general there are 2、4、6
water-circle number, and it rely on U type seal washer to detach the circle.
Numbers of seal channel are made between two bolt holes, screw plug press the O
ring tightly to make tube tank and fore-end tube plate connect together. Gas
outlet and water discharge are set on fore-tube tank. Gas outlet can ensure
that cooling water can be filled in all tube bundle in early operation of heat
exchanger. Water discharge is used in checking and repair, it can remove
cooling water in pipe.
The separator of bi-metal rolling compound fin tube type heat exchanger
is composed of separator frame and wire mesh demister etc.. The material of
separator frame is stainless steel. In order to ensure separating effect, wire
mesh demister always adopt high-efficiency type. When the length of heater is
more than two meter, it adopt multi-separator, with the structure connected by
bolt between separators or separator and casing for convenient checking and
repair.
Bi-metal rolling compound fin tube type heat exchanger is with advantage
of low power consumption、small pressure
lost、good proof-rust、high
heat exchanging efficiency. Nowadays it has been widely used in air-separation
industry.
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