CN2188743Y

CN2188743Y - Shell-and-tube heat exchanger

Info

Publication number: CN2188743Y
Application number: CN 93225774
Authority: CN
Inventors: 徐建平
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-28
Filing date: 1993-05-28
Publication date: 1995-02-01
Anticipated expiration: 2003-05-28

Abstract

The utility model relates to a shell-and-tube heat exchanger which is composed of a casing, a heat exchange tube bundle, an upper sealing head and a bottom sealing head and relates to the field of the chemical engineering machinery. The utility model is characterized in that the heat exchange tube bundle is made of the steel tube whose inner wall is coated with the plastic; the inner wall of the steel tube whose inner wall is coated with the plastic is coated with a layer of the powder. The utility model has the advantages the manufacture is convenient, the performance of the prevention of the cauterization and scale can improve in duplication mode and consequently, the service lift is extended.

Description

Shell-and-tube heat exchanger

The utility model relates to chemical machinery field, a kind of specifically shell-and-tube heat exchanger of heat exchanger tube inwall plastic-coated.

The heat-exchanging tube bundle of existing shell-and-tube heat exchanger mainly adopts metal tube and tube plate expanded-connecting or welding to make.Because the medium that flows in the heat exchanger tube can produce corrosion by the heat exchanging inside pipe wall, corrosivity dirt body is so often make shell-and-tube heat exchanger in use lose efficacy.For preventing this phenomenon, adopt again before shell-and-tube heat exchanger drops into actual the use, with manual mode of operation brushing liquid coating in heat exchanger tube, this method has certain effectiveness, but labour intensity big (need be coated with 6 times) thus the volatilization of paint solvent produces pin hole on coating can't eliminate and reduced the anti-corrosion anti-scale performance.

The purpose of this utility model is at above-mentioned defective, provides a kind of and can improve the anti-corrosion anti-scale performance greatly, the novel pipe shell type heat exchanger that increases the service life.

The utility model is achieved by the following technical solution, the metal tube that heat-exchanging tube bundle is used in the manufacture process of shell-and-tube heat exchanger, all adopt the inwall plastic-coated steel of coated inner wall powdery paints to replace, and can determine according to the performance of concrete service condition of heat exchanger and powdery paints, for example flow media is seawater or industrial wastewater in the heat exchanger tube, temperature is below 100 ℃, and then heat exchanger tube can be selected the inwall plastic-coated steel (physical and chemical performance of every kind of powdery paints all is disclosed by powdery paints manufacturer) of anti-corrosion type epoxies powdery paints coating for use.

Thereby only the utility model has the advantages that need to the heat-exchanging tube bundle of original heat exchanger transform thereby make easy to process since heat exchange steel pipe coated inner wall one deck powder coating significantly improved anticorrosion, dirty performance, and can prolong service life of the present utility model greatly.

Fig. 1 is the utility model structural representation;

Fig. 2 is the cutaway view of inwall plastic-coated heat exchanger tube of the present utility model.

(1)-inwall plastic-coated steel wherein, (1.a)-inside pipe wall, (1.b)-coating layer, (2)-tube sheet, (3)-and upper cover, (4)-low head, (5)-baffling, gripper shoe, (6)-housing, (7)-and the upper cover inlet, (8)-low head liquid outlet, (9) expansion joint, (10)-and the housing inlet, (11)-housing liquid outlet.

Structure of the present utility model is provided by following examples in conjunction with the accompanying drawings.

What as shown in Figure 1, the heat exchanger tube in the heat-exchanging tube bundle adopted is the inwall plastic-coated steel (1) of coated inner wall powdery paints.Tube sheet (2) is gone up the radical of pressing inwall plastic-coated steel (1), arrange after the perforate of position, with expanded joint or welding method with inwall plastic-coated steel (1) and tube sheet (2) sealing and fixing, make heat-exchanging tube bundle, be connected with housing (6), there is housing inlet (10) the housing upper right side, the lower-left side has housing liquid outlet (11), 1 expansion joint (9) is arranged in the middle of the housing (6), and housing (6) upper end connects upper cover (3), and upper cover one side has upper cover inlet (7); The lower end connects the first side of low head (4) lower seal a low head liquid outlet (8), is provided with split flow, gripper shoe (5) between heat-exchanging tube bundle, makes fluid follow prescribed path and crosses tube bank through cross-current repeatedly, increases end flow process degree, improves advection heat coefficient between pipe.

Shown in the accompanying drawing 2, inwall plastic-coated heat exchange steel pipe (1) is made up of inside pipe wall (1.a) and coating layer (1.b), in the heat-exchanging tube bundle manufacture process, the about 50mm of inwall plastic-coated heat exchange steel pipe (1) pipe end section coating layer (1.b) can damage, so after tube bank is made, powdery paints with the performance unanimity applies inwall plastic-coated heat exchange steel pipe (1) pipe end, makes pipe end place coating intact.

Claims

The shell-and-tube heat exchanger of a kind of heat-exchanging tube bundle of making by housing, inwall plastic-coated steel, upper cover, low head, the heat exchanger tube inwall plastic-coated formed, it is characterized in that heat-exchanging tube bundle makes with the inwall plastic-coated steel, the powdery paints coating layer of inwall plastic-coated steel inside pipe wall coating one deck different performance.