CN2175395Y

CN2175395Y - Drawer type heat exchanger

Info

Publication number: CN2175395Y
Application number: CN 93246834
Authority: CN
Inventors: 熊育铭; 熊朝晖
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-09
Filing date: 1993-12-09
Publication date: 1994-08-24
Anticipated expiration: 2003-12-09

Abstract

The utility model discloses a drawer type heat exchanger for carrying out the wall-type heat exchange for two fluids with different temperatures, and the heat exchanger is composed of a supporting framework (1), a heat insulating housing (2), heat exchanging units (4), pipe joints (3, 5, 6, 7), etc. Because bafflers enhancing heat transfer are arranged in the heat exchanging units, the utility model reduces the operating channel between the heat exchanging units and makes full use of space heights, so the drawer type heat exchanger has compact structure, house occupying area of the drawer type heat exchanger is 1/2-1/4 of a general shell-and-tube heat exchanger, and the heat transfer coefficient is raised by 10-30% higher than that of the general shell-and-tube heat exchanger; due to the adoption of a unit combining structure, the utility model has simple producing process and high regulating performance and standby. When the drawer type heat exchanger is used as a gas-water heat exchanger, the discharge temperature of condensed water can be reduced to a lower value than a preset value.

Description

Drawer type heat exchanger

The utility model belongs to heat-exchange apparatus, is to be used for heat exchanger that two kinds of fluid at differing temperatures (liquid or steam) are carried out the dividing wall type heat exchange.During design, different according to the phase of heat transferring medium with kind, can be divided into drawer formula steam water heat exchanger, drawer formula water-water heat exchanger, drawer formula oil heater or the like.

At present, China uses more general heat exchanger that three kinds of shell-and-tube heat exchanger, plate type heat exchanger and spiral heat exchangers etc. are arranged.Wherein shell-and-tube heat exchanger uses the extensivelyst, and it has with the manufacturing of common vessel steel, adopts welding and expand tube structure, can bear high temperature, high pressure, operation maintenance advantage such as conveniently; But because of heat transfer coefficient is lower, steel quantity consumption is bigger, particularly because the bodily form and equipment station floor space are big, it are promoted the use of be subjected to very big obstruction.In addition, existing shell-and-tube steam water heat exchanger, its condensate water discharge temperature is generally all pressed the saturation water temperature design under the relevant work pressure, need dispose the consumable accessory steam trap in the condensate water exit, system's leakage vapour and heat loss are bigger, as will further reducing condensing water temperature, need be installed in series water-water heat exchanger usually behind steam trap again, thereby make system complicated more, floor space is bigger.Plate type heat exchanger uses more in recent years, and its advantage is a compact conformation, saves floor space, and when the heat exchange that is used between the liquid, heat transfer coefficient is big.But board-like heat exchanger will will be equipped with a large amount of nonmetal rapid wear packing rings with the compacting of expensive metal such as stainless steel or titanium steel, generally is not suitable for the heat-exchange system of high temperature, high-pressure fluid, inconvenient maintenance.In addition, plate type heat exchanger is because of its design feature, and when being used for vapour-water heat-exchange system, heat transfer coefficient is lower.Spiral heat exchanger, because of its structural shortcoming, use amount is less relatively.

The purpose of this utility model is: make a kind of novel drawer formula heat exchanger, and its compact conformation, the heat transfer efficiency height, the station floor space is little, and load adjustment ability is good, can high temperature resistant, high pressure and sturdy and durable.When being heat transferring medium, can in same equipment, the condensate water discharge temperature be reduced to lower assigned temperature with steam.From leaking vapour and radiation loss in reducing.

For achieving the above object, the utility model " drawer formula heat exchanger " is used in down structure: in the non-garden shape lagging casing and shared framework of a unification, install several or several groups of novel pipe shell type heat exchange units (when having only a heat exchange unit, be a novel pipe shell type heat exchanger), phase, flow, the temperature difference and outlet temperature according to heat transferring medium between each heat exchange unit require to carry out parallel connection or tandem compound.Every group of heat exchange unit can switch use according to load variations, and each heat exchange unit can be extracted out in housing separately, does not normally move and do not influence other unit in parallel.

Heat exchange unit is by cylindrical shell, bobbin carriage, U-shaped heat-exchanging tube bundle, tube sheet, shell side deflection plate, deflector and respectively import and export parts such as pipe joint, bearing and form.The U-shaped heat-exchanging tube bundle bends with seamless steel pipe or copper pipe, adopts expanded joint to be connected with tube sheet, and cylindrical shell adopts flange to be connected with bobbin carriage, can demolition.

In drawer formula heat exchanger, each pipe joint that is connected with external pipe is drawn by shell upper or front end.The instrument board (not giving expression in the accompanying drawing) that shows each unit operational factor (temperature, pressure) is equipped with at the shell front end.

The advantage of the utility model " drawer formula heat exchanger " is: (1) compact conformation, and floor space is little, owing to can make full use of spatial altitude and reduce the both sides operating walk way, floor space only is 1/2～1/4 of an existing shell-and-tube heat exchanger; (2) heat transfer coefficient height, steel quantity consumption is few, owing to be provided with plane deflector and flanging deflector between the deflection plate of each unit, from having reduced the stagnant area, has improved heat transfer boundary condition, can improve heat transfer efficiency 10～30% than existing shell-and-tube heat exchanger.Simultaneously, the situation of two kinds of heat transferring mediums can be guaranteed, all suitable flow velocity can be chosen in any flow-rate ratio; (3) load adjustment ability is good, and each heat exchange unit in parallel can switch separately, and is standby each other.When a certain heat exchange unit inspection is cleaned, do not influence the continuous operation of other unit in parallel.(4) because a plurality of heat exchange units are installed in the unified lagging casing, reduce area of dissipation, simplified insulation construction; (5) drawer formula steam water heat exchanger can be reduced to the steam condensate discharge temperature lower temperature of appointment, from the leakage vapour and the radiation loss that have reduced system; (6) adopt common vessel steel making and welding or expand tube structure, no easily worn part can bear high temperature, high pressure, sturdy and durable, easy to maintenance.

Below in conjunction with drawings and Examples the utility model " drawer formula heat exchanger " is further described:

Fig. 1 is the heat exchange unit structural representation of the utility model " drawer formula heat exchanger ", is made up of cylindrical shell (1), heat-exchanging tube bundle (2), flanging deflector (3), bearing (4), tube side media outlet (5), bobbin carriage (6), pass partition (7), tube sheet (8), tube side medium inlet (9), shell side medium inlet (10), safety valve connecting pipe (11), deflection plate (12), shell side media outlet (13), plane deflector (14), impingement baffle (15) etc.Its heat-exchanging tube bundle (2) bends with seamless steel pipe or copper pipe, and expanded joint is on tube sheet (8).When the tube side medium was steam, U type tube bank should be horizontally disposed, when the tube side medium is liquid, but level or be arranged vertically.Tube sheet is fixed between the flange of cylindrical shell and bobbin carriage, can demolition, and flanging deflector (3) is arranged between the deflection plate (12), and its quantity is selected according to width of flow path lattice needs.Plane deflector (14) is arranged in shell side media outlet end.Each of heat exchange unit import and export to be taken over (5,9,10,11,13) according to its installation site in drawer formula heat exchanger, can make straight tube or 90 ° of elbows are drawn by housing top or front end.

Fig. 2 is the drawer formula heat exchanger of three group of nine unit of the utility model.Form by tube side medium inlet (1), shell side media outlet (2), heat exchange unit (3, totally nine), lagging casing (4), supporting frame (5), tube side media outlet (6), shell side medium inlet critical pieces such as (7).Vertical per three heat exchange units series connection is one group, three groups parallel connections, but each is adaptive switched, and is standby each other.

Fig. 3 is the drawer formula heat exchanger of two group of four unit of the utility model.Vertical two units in series are one group, and totally two groups compose in parallel.

Fig. 4 is the drawer formula heat exchanger of the utility model two unit parallel connections.Two unit can be standby each other.

The critical piece numbering is identical in Fig. 3 and Fig. 4, promptly is made up of supporting frame (1), lagging casing (2), tube side medium inlet (3), heat exchange unit (4), shell side media outlet (5), tube side media outlet (6) and shell side medium inlet (7) etc.

In the embodiment of Fig. 2 to Fig. 4, the import and export of drawer formula heat exchanger are taken over and are drawn by the top and the front end of lagging casing, and the shell front end is equipped with the instrument board (not shown) that shows each medium out temperature and pressure.

Claims

1, a kind of drawer formula heat exchanger is made up of lagging casing, shared supporting frame, shell-and-tube heat exchange unit and medium import and export, communicating pipe and relief valve connection etc.It is characterized in that: every equipment is in the non-garden shape lagging casing of a unification and supporting frame several shell-and-tube heat exchange units to be set, between each heat exchange unit by carrying out the serial or parallel connection combination communicating pipe.Each heat exchange unit all can be extracted out in lagging casing separately, and does not influence the heat exchange unit that other is installed in parallel.

2, drawer formula heat exchanger according to claim 1, it is characterized in that: each heat exchange unit is except that having the parts such as housing, bobbin carriage, tube bank, tube sheet, impingement baffle, deflection plate and pipe joint that general shell-and-tube heat exchanger possesses, between every two adjacent deflection plates, reach the cylindrical shell two ends and set up flanging deflector and plane deflector, runner between per two deflection plates and deflection plate are divided into two or more parallel shuntings with passage between the cylindrical shell two ends, and deflector adopts the thick steel plate of 4～10mm.

3, drawer formula heat exchanger according to claim 1 is characterized in that: its lagging casing is that folding plate combines, and this lagging casing depends on the supporting frame.

4, drawer formula heat exchanger according to claim 1, it is characterized in that: all (comprise the medium gateway with the extraneous pipe joint that is connected in this heat exchanger, the exhaust outlet mouth, relief valve connection etc.) to draw by the top or the front end of lagging casing, pipe joint can be straight joint or 90 ° of elbows.

5, drawer formula heat exchanger according to claim 1 is characterized in that: when being heat transferring medium with steam, utilize the tandem compound of heat exchange unit the condensate water discharge temperature to be reduced to the lower temperature of appointment in same heat exchanger.