CN2474976Y - Plate-fin type overflow falling membrane heat calorie exchanger - Google Patents

Abstract

The utility model relates to a plate-fin overflow falling-film thermal mass exchanger which comprises a flow regulator, a plate-fin heat exchanger, a shell, liquid feed and drain pipes and a steam inlet cavity. The flow regulator is arranged on the top of the shell, the steam inlet cavity is arranged on the two sides of the shell, a plate-fin heat exchanging component is disposed on the lower portion of the flow regulator, the liquid feed pipes are arranged on the two sides of the flow regulator, the liquid feed pipes are connected with a major delivery channel. The liquid gets into the major delivery channel and is full and overflowed into a falling-film channel through a branch delivery channel, and is heat exchanged through the plate-fin heat exchanger. The plate-fin heat exchanger is high efficient and compact, and makes the falling-film pattern to be the overflow pattern, thereby the utility model is compact in structure, small in volume, low in cost and has a batter heat transferring and mass transferring effect.

Description

Plate-fin overflow film-lowering type heat and mass exchanger

The plate-fin overflow film-lowering type heat and mass exchanger of industry such as the utility model relates to and a kind ofly is used for freezing, air-conditioning, chemical industry.

At present, employed film-lowering type heat and mass exchanger sprays the falling liquid film form based on shell-and-tube in the industries such as refrigeration, air-conditioning and chemical industry.According to different mass transfer purposes, shell-and-tube spray film-lowering type heat and mass exchanger can be divided into shell-and-tube spray film-lowering type absorber and shell-and-tube spray film-lowering type generator.In shell-and-tube spray film-lowering type absorber, as shown in Figure 1, absorb liquid and spray in the following front row tube bank 2, and drip on the following comb bundle 3 by the front row tube bank according to this by nozzle 1 part, it is dirty that liquid is liquid film along the tube wall outside.All the other liquid then are sprayed onto in the space between the shell.Being absorbed medium is gas 4, is full of between the shell, and a part is absorbed into film when contacting with liquid liquid film on the tube wall, and all the other directly contact and be absorbed with the drop 5 that is sprayed between the shell.Owing to generally will discharge when absorbing and absorb heat, the rising of liquid film temperature, absorbability are weakened, thereby be connected with cooling medium 6 in the pipe, be used to cool off liquid film 7, strengthen its absorbability.Shell-and-tube spray film-lowering type generator schematic structure is also as above schemed, in shell-and-tube spray falling liquid film gas generator, liquid takes place to spray in the following front row tube bank 2 by nozzle 1 part, and dripped on the following comb bundle 3 by the front row tube bank according to this, it is dirty that liquid is liquid film along the tube wall outside.Different is logically in the pipe has plenty of heat medium 6 with aforementioned tube shell-type spray film-lowering type absorber, is used to heat liquid film 7, and gas component is come out.Because this shell-and-tube spray falling liquid film equipment heat transfer coefficient is not high, make heat transfer area bigger, structure is not compact, and volume is big, investment is higher.In recent years, though plate-fin heat exchanger by the industrial quarters extensive use, yet do not used in the heat and mass as yet.By the plate-fin spray film-lowering type heat and mass exchanger of the applicant's application, overcome shell-and-tube spray film-lowering type heat and mass exchanger shortcoming, adopt plate-fin heat exchanger, but it has adopted the spray mode, can produce non-uniform spraying, influences falling liquid film effect and heat-transfer effect.

Therefore, the purpose of this utility model is in order to overcome the shortcoming of prior art, a kind of effective plate-fin overflow film-lowering type heat and mass exchanger of compact conformation, heat and mass that adopts the overflow film-lowering type with the plate-fin heat exchange element again to be provided.

The technical solution of the utility model is achieved like this, plate-fin heat exchanger, housing, feed tube, discharging tube and admission chamber that it comprises current distribution device, is made up of a plurality of plate fin heat-exchanging elements, current distribution device places housing top, the plate fin heat-exchanging element places the bottom of current distribution device, the admission chamber is distributed in the housing both sides, the current distribution device both sides are equipped with feed tube, feed tube is connected with the main liquid bath that divides, liquid enters the main liquid bath that divides by feed tube, put the falling liquid film groove through a full hydrorrhea stream of branch liquid bath again, by the plate-fin heat exchanger heat exchange.

Because plate-fin heat exchanger is a kind of high-efficiency compact formula heat transmission equipment, now be used to have heat transfer that the occasion of mass transfer is arranged again, the effect that can obtain, it and current distribution device make up, making the falling liquid film generation type is overflow type, so the utility model patent structure compactness, and volume is little, can reduce cost, heat and mass is effective.

The utility model embodiment does an into explanation in conjunction with the accompanying drawings.

Fig. 1 is shell-and-tube spray film-lowering type heat and mass exchanger principle schematic;

Fig. 2 is the utility model structural front view;

Fig. 3 is the utility model structure side view;

Fig. 4 is Fig. 3 A-A partial sectional view;

Fig. 5 is a plate fin heat-exchanging component structure schematic diagram.

The utility model embodiment is used in the refrigeration system with lithium bromide absorption, by Fig. 2,3, shown in 4, it comprises current distribution device 9, the plate-fin heat exchanger of forming by a plurality of plate fin heat-exchanging elements 8, housing 10, feed tube 11, discharging tube 12 and admission chamber 13, current distribution device 9 places housing 10 tops, plate-fin heat exchanger 8 places the bottom of current distribution device 9, admission chamber 13 is distributed in housing 10 both sides, the current distribution device both sides are equipped with feed tube 11, feed tube 11 is connected with the main liquid bath 16 that divides, liquid enters the main liquid bath 16 that divides by feed tube 11, put falling liquid film groove 15 through a branch liquid bath 14 full hydrorrhea streams again, by the plate-fin heat exchanger heat exchange.Each plate-fin heat exchanger 8 is made up of with a plurality of plate fin heat-exchanging elements 18 tube connector 17 of two logical cold and hot media, by shown in Figure 5, each plate fin heat-exchanging element 18 is formed by two thin plates 19 and fin 20 encapsulation, can be little concaveconvex shape or be equipped with wing on the face of thin plate 19 formation falling liquid films, leave the gap between a plurality of plate fin heat-exchanging elements.The number of plies of plate fin heat-exchanging element, row's number can be set according to designing requirement, during fabrication, the withstand voltage properties test of 0.3Mpa need be carried out in plate fin heat-exchanging element inboard, and the assurance housing is not ganged up leakage with the external world and plate fin heat-exchanging element inboard under negative pressure, and indeformable.

Claims (4)

1, a kind of plate-fin overflow film-lowering type heat and mass exchanger, it is characterized in that, it comprises current distribution device (9), the plate-fin heat exchanger of forming by a plurality of plate fin heat-exchanging elements (8), housing (10), feed tube (11), discharging tube (12) and admission chamber (13), current distribution device (9) places housing (10) top, plate-fin heat exchanger (8) places the bottom of current distribution device (9), admission chamber (13) is distributed in housing (10) both sides, the current distribution device both sides are equipped with feed tube (11), feed tube (11) is connected with the main liquid bath (16) that divides, liquid enters the main liquid bath (16) that divides by feed tube (11), put falling liquid film groove (15) through the full hydrorrhea stream of a branch liquid bath (14) again, by the plate-fin heat exchanger heat exchange.

2, plate-fin overflow film-lowering type heat and mass exchanger according to claim 1, it is characterized in that, described plate-fin heat exchanger (8) is made up of with a plurality of plate fin heat-exchanging elements (18) the tube connector (17) of two logical cold and hot media, leaves the gap between a plurality of plate fin heat-exchanging elements (18).

According to claim 1,2 described plate-fin overflow film-lowering type heat and mass exchangers, it is characterized in that 3, described plate fin heat-exchanging element (18) is formed by two thin plates (19) and fin (20) encapsulation.

4, according to claim 1,3 described plate-fin overflow film-lowering type heat and mass exchangers, it is characterized in that, can be little concaveconvex shape or be equipped with wing on the face of described thin plate (19) formation falling liquid film.

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