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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