CN2177214Y

CN2177214Y - Detachable enamelled tube shell heat exchanger

Info

Publication number: CN2177214Y
Application number: CN 93210670
Authority: CN
Inventors: 王平
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-22
Filing date: 1993-04-22
Publication date: 1994-09-14
Anticipated expiration: 2003-04-22

Abstract

The utility model relates to a novel tube casing heat exchanger, which is characterized in that a heat exchange tube is made of a steel tube or an iron tube with enamel on the outside of the tube, and has a detachable structure. The designed pressure of the heat exchanger can reach 1.6MPa, the heat exchange area can reach 50m <2> per set, and the heat exchanger can be used for processing various high corrosive medium (except hydrofluoric acid). The utility model has the advantages that the utility model not only keeps high heat transfer coefficient and economy, but also endures the strong corrosive medium; the utility model can replace double-pipe, calandria, jacketed and laminated heat exchangers in many fields, and is a somewhat ideal novel tube casing corrosion-resistance heat exchanger.

Description

Detachable enamelled tube shell heat exchanger

Removable enamel pipe shell-and-tube heat exchanger belongs in the mechanical engineering, the fluid heater that separates with pipe, and with the enamel pipe as basic heat exchange element.Be applicable in the industry such as chemical industry, pharmacy that it is then more effective particularly the medium with corrosion to be carried out exchange heat.

At present, employed enamel heat exchanger mainly contains bushing type, stacked and jacket type.Bushing type is to constitute the heat exchanger of two different runners by two kinds of straight being nested together through the different pipe of size, and its resistance to pressure good (can reach 10MPa) make simply, but the thermal efficiency is low, and volume is big.Stacked is to be made of the equitant enamel plate of multilayer, and the rubber blanket of sealing is housed between every layer, has the hole that goes out, goes into for fluid on the plate, and to form different runners, its heat-transfer effect is better, and is easy to operate, but withstand voltage properties poor (less than 0.25MPa).Jacket type is made of the column type bobbin that two diameter axis inequality coincide.Its advantage is that processed amount is big, but the thermal efficiency is low, and volume is big.

Implementing the purpose of this utility model is for the technical field of heat exchange in the mechanical engineering provides a kind of performance preferable, i.e. pressure≤1.6MPa; Temperature≤180 ℃; Heat transfer coefficient reaches 900～1100; Volume is less, has corrosion resistance and is convenient to the heat exchanger of fitting operation.

The utility model technical conceive required for protection and technical scheme are as follows: in view of the many products in chemical industry and the pharmaceutical industry and intermediate products thereof all have stronger corrosivity, and above cited several heat exchangers are difficult to meet the demands simultaneously for performance indications aspects such as anti-corrosive properties, resistance to pressure, sealing, dismoutability and conductivities of heat.For this reason, the utility model is equipped with sealing between tube sheet and heat exchanger tube hands over circle, ring washer and tight loop, to guarantee the sealing property of heat exchanger.Tube sheet and heat exchanger tube are that appearance scribbles the steel plate of enamel or made by polytetrafluoroethylene (PTFE) fiberglass, to improve anti-corrosive properties.Heat exchanger tube is straight shape, U-shaped or disk-shaped tube, to improve heat transfer property.Simultaneously, the cylindrical car of tight loop has screw thread, and it and ring washer, O-ring seal had both played the fit sealing effect, is again movable dismountable, makes fitting operation convenient.

The utility model is further described below in conjunction with embodiment.Fig. 1 is a kind of generalized section of removable enamel pipe shell-and-tube heat exchanger structure.Fig. 2 is the structure enlarged drawing that I comprises part.Among the figure: the 1-bobbin carriage; The corrosion-resistant tube sheet of 2-; The 3-appearance scribbles the heat exchanger tube of enamel; 4-split flow plate; 5-shell side casing; The 6-Corrosion resistant linings; 7-pull bar, spacing bar; The 8-bearing; 9-erosion control baffle plate is contained in the import department of fluid; 10-bolt, nut and pad play the connection effect; The 11-O-ring seal; The 12-ring washer; The 13-tight loop, its place's circle car has screw thread, plays the role of fastening; The 14-dividing plate.Mordant medium is entered by the C place, d output.Another kind of medium then all can by a, the turnover of b place.

Existing heat exchanger is compared with the utility model, is by O-ring seal 11 between its heat exchanger tube 3 and the tube sheet 2, and back-up ring 12 and tight loop 13 link together them, and reach the purpose of sealing.Leave the gap (see figure 2) of 0.2～1.5mm between heat exchanger tube 3 and the tube sheet 2, to the heat exchanger tube of different-diameter and the desirable different numerical value of tube sheet of different-thickness, to guarantee the normal mounting and the use of heat exchanger tube.O-ring seal 11 is respectively an angle with the axial binding face of tube sheet 2 and back-up ring 12, according to different pressure ratings and different heat exchanger tubes, be decided to be 15 °～45 ° and 90 °～135 ° (calculating counter clockwise) respectively, to guarantee the reliability of sealing with the angle of tube axis.The outer of back-up ring 12 is provided with two positioning boss (symmetry), and its effect is to provide axial force for 11 of O-ring seals.The effect of tight loop 13 is that the interaction of the internal thread of being attacked on outer silk and the tube sheet 2 by self to seal needed thrust for O-ring seal provides, and leaves the gap of 0.4～1.6mm between it and the heat exchanger tube.When screwing tight loop 13, the axial thrust of generation is delivered on the O-ring seal 11 by back-up ring 12, reaches the effect of sealing after the O-ring seal distortion.Korrosionsmedium can only be flowed on the surface that enamel is arranged, and heat exchanger gets final product heat exchange like this, again can be anticorrosion.Heat exchanger when work, the two media that temperature is different, promptly a kind of is that mordant medium is entered by C, scribbles the heat exchanger tube 3 of enamel through appearance, is exported by d; And non-corrosive medium by the turnover of a, b place all can, its flow through outer surface of heat exchanger tube 3, two media carry out the exchange of heat energy in casing.Only told about the situation of heat exchanger tube one end sealing device here, two ends of each root heat exchanger tube are equipped with same sealing device (heat exchanger tube as straight tube time also identical) in actual the use, and the tube bank of a removable enamel pipe shell worker heat exchanger is formed with the heat exchanger tube of spline structure and sealing device by many.In addition with polytetrafluoroethylene (PTFE) or fluorubber lining at all inner surfaces that can contact with medium of shell side bobbin carriage 5.The user can turn round down earlier tight loop as required, pulls down heat exchanger tube again, and structure in addition is identical with the conventional tube shell heat exchanger.

Removable enamel pipe shell-and-tube heat exchanger has following useful effect compared with prior art.

(1) compressive resistance is higher, can reach 1.6MPa, is better than stacked and jacket type, but not as good as bushing type.

(2) good thermal conduction, thermal conductivity factor be greater than bushing type and jacket type, but be slightly less than stacked.

(3) heat resistance is higher than stackedly, but is lower than bushing type and jacket type.

(4) volume is little than bushing type and jacket type.

(5) corrosion resistance is stronger than bushing type and jacket type.

(6) be convenient to fitting operation.

To sum up state, by global index as can be known the utility model be the heat exchanger that is better than other type.

Claims

1, a kind of removable enamel pipe shell-and-tube heat exchanger, it is made up of bobbin carriage 1, tube sheet 2, heat exchanger tube 3, split flow plate 4, shell side casing 5, Corrosion resistant linings 6, pull bar and spacing bar 7, bearing 8, erosion control baffle plate 9 and connecting bolt assembly 10, it is characterized in that: O-ring seal 11, ring washer 12 and tight loop 13 are housed between tube sheet 2 and heat exchanger tube 3; Tube sheet 2 is to be made by steel plate or polytetrafluoroethylene (PTFE) fiberglass that outer surface scribbles enamel; Heat exchanger tube 3 is steel pipe or iron pipes that appearance scribbles enamel, its shape or straight shape pipe, or U-shaped pipe, or disk-shaped tube.

2, according to the described removable enamel pipe shell-and-tube heat exchanger of claim 1, the angle that it is characterized in that the axial veneer of O-ring seal 11 and tube sheet 2, back-up ring 12 is respectively 15 °～45 ° and ° 90～135 ° (and the angle numerical value between tube axis calculates counter clockwise).

3, according to claim 1 and 2 described removable enamel pipe shell-and-tube heat exchangers, it is characterized in that rubber ring, fluorubber or polytetrafluoroethylene (PTFE) that O-ring seal 11 is sealed by polytetrafluoroethylene (PTFE) make, its cross section is rounded.

4, according to claim 1 or 2 described removable enamel pipe shell-and-tube heat exchangers, there is the boss of a symmetry outer that it is characterized in that back-up ring 12.

5, according to the described removable enamel pipe shell-and-tube heat exchanger of claim 1, it is characterized in that the cylindrical car of tight loop 13 has screw thread.