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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