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To undertake all kinds of water-cooled condenser, horizontal shell condenser, tube condenser, U condenser

承接各種水冷式冷凝器 臥式管殼式冷凝器 套管式冷凝器 U型冷凝器

Detailed description:



表面冷凝器, F=92㎡, D=700mm, L=5.5m, 不銹鋼


表面冷凝器, F=46.7㎡,D=500mm,L=5.5m, 不銹鋼




according to user needs to design and manufacture various types of heat transfer equipment. A variety of fixed tube plate heat exchanger, heat exchangers, stuffing type heat exchanger, U type heat exchanger, condenser, condenser tube, heat exchanger, stainless steel heat exchanger, water-cooled condenser, air condenser, evaporative condenser, shell and tube condenser, horizontal shell and tube condenser, condenser, condenser type U
Tube type heat exchanger
The tubular heat exchanger is a heat exchanger currently produces chemicals and alcohol on the most widely used. The utility model is mainly composed of a shell, a pipe plate, a heat exchange tube, a sealing head and a baffle baffle. The required material can be made of plain carbon steel, copper or stainless steel. In the heat exchanger, a fluid from the head of the connecting pipe into the pipe, flow, flow from the head of the other end of the outlet pipe, the said tube; another fluid from the housing from the housing into the nozzle, a connecting pipe outflow, this is called the shell tube heat exchanger for.
Tubular heat exchanger type
Fixed tube plate heat exchanger
The structure of this kind of heat exchanger is simple, compact and cheap, but it can not be cleaned outside the pipe. The heat exchanger pipe bundle is connected with the pipe plate, the pipe plate is welded at both ends of the shell and is connected with a top cover, and the top cover and the shell are provided with a fluid inlet and outlet pipe. A series of tubes perpendicular to the tube are usually arranged outside the pipe. At the same time, the connections between the tube and the tube plate and the casing are rigid, while the tubes are two fluids of different temperature. Therefore, when the pipe wall and the shell wall temperature difference is large, due to the different thermal expansion, great temperature stress, and pipe bending or the pipe from the tube plate loose, or even the destruction of heat exchanger.
In order to overcome the temperature stress, there must be a temperature difference compensation device. Generally, when the temperature difference between the tube wall and the shell wall is above 50 degrees Celsius, for the sake of safety, the heat exchanger should have a temperature difference compensation device. But the compensating device (expansion joint) can only be used in the case that the temperature difference between the shell wall and the tube wall is lower than 60~70 degrees and the liquid pressure in the shell side is not high. When the shell pressure exceeds 0.6Mpa, due to the excessive thickness of the compensating ring, it is difficult to expand and lose the temperature difference compensation, so other structures should be considered.
Floating head type heat exchanger
The heat exchanger is connected with a tube plate flange and shell, another piece of pipe plate is connected with the outer shell, so that the pipe is heated or cooled when the free expansion, but connected with a cover in the tube plate, called &ldquo " floating head heat exchanger; and so this is called floating head heat exchanger. Its advantages are: the tube can be pulled out, so that cleaning; bundle expansion shell invariant constraints, so when the two heat exchanger medium temperature, not due to the thermal expansion of tube bundle and shell have different temperature stress. Its disadvantages are complicated structure and high cost.
Stuffing box heat exchanger
This type of heat exchanger is free to expand, simple structure than the float, the cost is low than the floating head. However, it is possible for the medium in the shell to leak out, and Yi Huifa, flammable, explosive and poisonous medium should not be treated in the shell course.
U tube heat exchanger
U tube type heat exchanger, each tube is bent into U shape, both ends are fixed on the same tube plate, each tube can be freely telescopic, so as to solve the heat compensation problem. The pipe is at least two courses, the tube can be removed and cleaned, and the pipe can expand freely. The disadvantage is that the inner wall of the pipe is difficult to be cleaned, the replacement of the pipe is difficult, and the tubes arranged on the pipe plate are less. The utility model has the advantages of simple structure and light weight, and is suitable for the condition of high temperature and high pressure.
Tubular heat exchanger baffle
In order to improve the flow velocity of the shell side, a baffle plate with a number of baffles perpendicular to each other is often installed in the shell. Baffle baffles can not only prevent short flow of fluid and increase flow velocity of fluid, but also force the fluid to flow through the tube according to the prescribed path. The turbulence degree increases greatly. The common baffles are round, short and circular, and the former is more commonly used than the other two.
Multi tube shell heat exchanger heat exchanger
The tubular heat exchanger must consider the effects of thermal expansion from the structure, adopt various ways to compensate, eliminate or reduce thermal stress, according to the temperature compensation measures.
Heat exchanger leakage analysis
Heat exchanger leakage is a heat exchanger equipment management problems in most common use, the leakage is mainly caused by corrosion, a small part of the manufacturing defect is due to the selection of heat exchanger and the heat exchanger itself, corrosion forms of tubular heat exchanger basically has two kinds: the electrochemical corrosion and chemical corrosion. Tubular heat exchanger in production, plate and tube welding by manual arc welding, weld shape in the presence of different degrees of defects, such as depression, porosity, slag, weld seam stress distribution is not uniform. When in use, the tube plate part generally contacts the industrial cooling water, and the impurities, salts, gases and microorganisms in the industrial cooling water form corrosion to the tube plate and the weld. This is what we call electrochemical corrosion. Studies show that industrial water, either fresh or sea water, has a variety of ions and dissolved oxygen, in which the concentration of chloride and oxygen plays an important role in the corrosion of metals. In addition, the complexity of the metal structure also affects the corrosion morphology. Therefore, the corrosion of tube and tube welds is dominated by pitting corrosion and crevice corrosion. From the outside view, there will be many corrosion products and deposits on the surface of the tube plate, and the pits with different sizes are distributed. When seawater is used as a medium, it also produces galvanic corrosion. Chemical corrosion is the corrosion of the medium, and the heat exchanger tube plate is exposed to various chemical mediums and is corroded by chemical medium. In addition, the heat exchanger tube plate and the heat exchange tube will produce a certain