CN106323058A - Heat exchange system of MGGH - Google Patents

Abstract

The invention discloses a heat exchange system of an MGGH. The system comprises a heating heat-exchanger, desulfurization and dust removal equipment and a cooling heat-exchanger which are arranged sequentially; the heating heat-exchanger and the cooling heat-exchanger are connected by the aid of pipelines to form a closed circulation loop; a medium compensation tank, a circulation pump and a medium heater are arranged on the closed circulation loop; each of the heating heat-exchanger and the cooling heat-exchanger comprises a casing, a convergence box and a plate type heat exchange module; a smoke inlet channel and a smoke discharge channel are arranged at the upper end and the lower end of each casing, and each of the smoke inlet channel and the smoke discharge channel comprises a flange and a guiding barrel; and each plate type heat exchange module comprises multiple heat exchange plates, flue supporting bulges and medium channel supporting bulges are arranged on two sides of the heat exchange plates, heat exchange medium baffle runners are formed among the medium channel supporting bulges of the adjacent heat exchange plates, and discharged smoke once-through channels are formed among the flue supporting bulges of the adjacent heat exchange plates. The heat exchange system can treat smoke in a low energy consumption manner, adopts the simple structure, is low in input cost and running cost, runs reliably, has high heat exchange efficiency and is easy to clean and maintain, and the MGGH is high in strength and long in service life.

Description

A kind of MGGH heat-exchange system

Technical field

The present invention relates to power industry exhaust gas treatment plant technical field, particularly relate to a kind of MGGH Heat-exchange system.

Background technology

In order to adapt to the regulation of GB13553-2011 " fossil-fuel power plant atmospheric pollutant emission standard ", coal-fired Electricity power enterprise needs to carry out corresponding desulfurization process before smoke evacuation, at present, at flue gas desulfurization both domestic and external The heat exchanger that reason technology is mainly taked has swinging flue gas heat-exchange unit (RGGH) and intermediate heat media flue gas 2 kinds of heat exchanger (MGGH), wherein, MGGH is energy-conservation with it, performance driving economy and the advantage of reliability, There is bigger market prospect.

MGGH is the high-temperature heating medium utilizing former cigarette, reduces flue-gas temperature, reduces flue gas flow, carries High fume treatment performance, re-uses medium heating low temperature neat stress so that it is exhaust temperature raises, it is easy to Dissipate；The MGGH of prior art is mostly based on tubular type, finned, flue gas and cooling water pipeline table Face contact realizes heat exchange, and contact area is little, and heat exchange stroke is long, and smoke evacuation pressure drop is big, and heat exchange The design of tube bank and arrange and cannot make full use of the effective heat exchange area in heat exchange box body, meanwhile, Owing to flue gas and heat exchanger tube are perpendicular contact, smoke evacuation resistance is big, the lee face of cooling water pipeline and The easy dust stratification in stagnant area, is difficult to clear up, and causes its heat exchange property to reduce.

Summary of the invention

The technical problem to be solved is, overcomes the deficiencies in the prior art, it is provided that one Plant compact conformation, smoke evacuation resistance is little, clear up convenient and that heat exchange efficiency is high MGGH heat-exchange system.

A kind of MGGH heat-exchange system of the present invention is to be achieved by the following technical programs, its bag Include temperature rise heat exchanger, desulfurating dust-removing equipment and the cooling heat exchanger being set in turn on smoke discharge pipe, The medium import of pipeline connection temperature rise heat exchanger and the media outlet of cooling heat exchanger and pipeline connect The media outlet of temperature rise heat exchanger and the medium import of cooling heat exchanger, the closing forming heat catalysis follows Loop back path, closed circulation is provided with medium compensating tank, circulating pump and medium heater；

Wherein, temperature rise heat exchanger and cooling heat exchanger all include:

Housing, its upper and lower end is provided with fume inlet passage and discharge flue, fume inlet passage by suction flange and Enter cigarette guide cylinder constitute, discharge flue by outlet(discharge) flange and smoke evacuation guide cylinder constitute, enter cigarette guide cylinder and The inwall of smoke evacuation guide cylinder is provided with leads cigarette gradient；

The header box connected with housing, medium import and media outlet are respectively arranged on its two ends；

And it being positioned at the board-like heat exchange module of enclosure interior, its one end is connected with header box, board-like heat Exchange module includes several being parallel to the evenly distributed heat exchanger plates in direction of discharging fume, and the both sides of heat exchanger plates are respectively Being provided with flue support protrusion and medium road support protrusion, the medium road support protrusion of adjacent heat exchanger plates offsets Lean on or medium road support protrusion leans with the board plane of heat exchanger plates and is connected, form connection medium import The heat catalysis folding Cheng Liudao of the sealing with media outlet, heat catalysis folding Cheng Liudao include several having Circumferential passageway that standalone media is imported and exported and make heat catalysis circumferentially passage in being arranged on circumferential passageway The reciprocal pass partition rolling over Cheng Liudong, forms smoke evacuation once between the flue support protrusion of adjacent heat exchanger plates Flow through passage.

Further, it is equipped with temperature pick-up in the discharge flue of temperature rise heat exchanger and cooling heat exchanger Device, medium heater is also associated with heating electromagnetic valve, and closed circulation is additionally provided with connection cooling heat exchange The medium import of device and a bypass branch of media outlet, bypass branch is provided with bypass solenoid valve, rises Temperature transmitter on temperature heat exchanger is electrically connected with heating electromagnetic valve, and the temperature in cooling heat exchanger becomes Device is sent to be electrically connected with bypass solenoid valve.

Further, pass partition is at least one, and the folding number of passes of heat catalysis folding Cheng Liudao is even number, Header box is positioned at housing side, and is internally provided with dividing plate, and dividing plate will completely cut off in header box and medium The inlet distribution district of inlet communication and the outlet doab connected with media outlet.

Further, pass partition is at least one, and the folding number of passes of heat catalysis folding Cheng Liudao is odd number, Header box is made up of two housing parts being positioned at housing both sides.

Further, medium road support protrusion and flue support protrusion be that punching press ripple is protruding, weldering muscle or Plate muscle.

Further, it is provided with elastomer, elastomer between the other end and the housing of board-like heat exchange module For spring or rubber.

Further, it is provided with flexible board, flexible board between the other end and the housing of board-like heat exchange module It is against the L-shaped backup plate on board-like heat exchange module end angle and housing side including the one-body molded card that formed It is adjacent to the fixed plate of location and connects L-shaped backup plate and the bending bent plate of fixed plate.

The invention has the beneficial effects as follows:

1., under the cycle heat exchange of the heat catalysis in closed circulation, utilize the heat of former cigarette Neat stress, can realize low power consuming fume treatment, and fume treatment effect is notable, meanwhile, and simple in construction, Put into and operating cost is low, reliable；

2. smoke evacuation is through cooling heat exchanger and temperature rise heat exchanger, leads cigarette gradient enter cigarette guide cylinder Guide effect under, smoke evacuation be evenly distributed at board-like heat exchange module flow field, wall occur cold and hot not Isostasy, improves heat exchange efficiency；

3. smoke evacuation carries out many journeys interlock countercurrent flow with heat catalysis in heat exchange module, phase mutual connection Contacting surface is long-pending big, and therefore, heat exchange stroke can shorten largely, and the structure of heat exchanger is compacter, more It is easily mounted on smoke discharging pipe or chimney, and the distance of temperature rise heat exchanger and cooling heat exchanger is unrestricted System；

4. heat exchanger plates is respectively provided on two sides with support protrusion, not only can form heat catalysis and discharge flue, Also can improve heat exchanger plates simultaneously and bear the ability of pressure at both sides difference, prevent heat exchanger plates from deforming the sealing caused The problem lost efficacy, and board-like heat exchange module is originally as a mould that can independently realize sealing heat exchange Block, is not required to be formed with housing side seal, and therefore, longtime running is reliable, and is prone to carry out modularity Assemble.

Accompanying drawing explanation

Fig. 1 is the structural representation of the present invention；

Fig. 2 is the structural representation of temperature rise heat exchanger in Fig. 1；

Fig. 3 is the structural representation of flexible board in Fig. 2；

Fig. 4 is the countercurrent flow pattern schematic diagram of the heat exchanger plates pair of the present invention；

Fig. 5 is the forward flow pattern schematic diagram of the heat exchanger plates pair of the present invention.

In figure: 1. temperature rise heat exchanger, 10. housing, 11. flexible boards, 111. fixed plates, 112. bendings Bent plate, 113.L shape backup plate, 12. board-like heat exchange modules, 121. heat exchanger plates pair, 1211. points of journeys every Plate, 1212. circumferential passageways, 1213. flue support protrusion, 1214. medium road support protrusion, 13. rows Cigarette channel, 131. outlet(discharge) flanges, 132. smoke evacuation guide cylinders, 14. fume inlet passages, 141. suction flanges, 142. enter cigarette guide cylinder, 15. header boxs, 16. media outlet, 17. medium imports, 18. header boxs Cover plate, 19. dividing plates, 2. cooling heat exchanger, 3. bypass solenoid valve, 4. medium compensating tank, 5. circulation Pump, 6. medium heater, 7. heating electromagnetic valve, 8. desulfurating dust-removing equipment；

A: smoke evacuation, B: heat catalysis (can be the liquid that the coefficients of heat transfer such as water, coolant or oil are high).

Detailed description of the invention

In order to make those skilled in the art be more fully understood that technical scheme, below In conjunction with accompanying drawing and most preferred embodiment, the present invention is described in further detail.

As Figure 1-5, the board-like low-level (stack-gas) economizer of one of the present invention, it includes being set in turn in cigarette Temperature rise heat exchanger 1, desulfurating dust-removing equipment 8 and cooling heat exchanger 2 on gas delivery pipe, pipeline connects The medium import 17 of temperature rise heat exchanger 1 and the media outlet 16 of cooling heat exchanger 2 and pipeline are even Connect the media outlet 16 of temperature rise heat exchanger 1 and the medium import 17 of cooling heat exchanger 2, form heat transfer The closed circulation of medium, closed circulation be provided with medium compensating tank 4, circulating pump 5 and Medium heater 6, medium compensating tank 4 can supplement the heat catalysis in closed circulation, stablize back Medium pressure in road, circulating pump 5 provides heat catalysis circulation power, medium heater 6 to be located at liter Medium import 17 rear end of temperature heat exchanger 1, adds the heat catalysis entering temperature rise heat exchanger 1 Heat, it is ensured that exhaust gas temperature；

Wherein, temperature rise heat exchanger 1 is consistent with the structure of cooling heat exchanger 2, and it all includes:

Housing 10, its upper and lower end is provided with fume inlet passage 14 and discharge flue 13, fume inlet passage 14 By suction flange 141 with enter cigarette guide cylinder 142 and constitute, discharge flue 13 is by outlet(discharge) flange 131 He Smoke evacuation guide cylinder 132 is constituted, and enters the inwall of cigarette guide cylinder 142 and smoke evacuation guide cylinder 132 and is provided with and leads cigarette Gradient, i.e. enters cigarette guide cylinder 142 and smoke evacuation guide cylinder 132 has conical internal cavity, or enters cigarette guide cylinder 142 and smoke evacuation guide cylinder 132 inner chamber four wall be with discharge fume direction formed be more than 0 ° of angle oblique Wall, can select with the shape of housing 10 as required；Also set on the upper and lower side port of housing 10 simultaneously There are pull bar or lacing wire (not shown), for fixing and spacing board-like heat exchange module 12；

The header box 15 connected with housing 10, medium import 17 and media outlet 16 are respectively arranged on it Two ends；

And it is positioned at the board-like heat exchange module 12 within housing 10, its one end is connected with header box 15, Board-like heat exchange module 12 includes several being parallel to the evenly distributed heat exchanger plates in direction of discharging fume, heat exchanger plates Be respectively provided on two sides with flue support protrusion 1213 and medium road support protrusion 1214, adjacent heat exchanger plates Medium road support protrusion 1214 lean, or the medium road support protrusion 1214 on a heat exchanger plates Lean with another heat exchanger plates upper plate plane, and connect formation connection medium import 17 and media outlet The heat catalysis folding Cheng Liudao of the sealing of 16, heat catalysis folding Cheng Liudao include several having standalone media The circumferential passageway 1212 imported and exported and make heat catalysis circumferentially passage in being arranged on circumferential passageway 1212 1212 pass partitions 1211 back and forth rolling over Cheng Liudong, the flue support protrusion 1213 of adjacent heat exchanger plates it Between formed smoke evacuation once-through passage, between the flue support protrusion 1213 of adjacent heat exchanger plates formed row Cigarette once-through passage, flue support protrusion 1213 can connect by abutting contact relatively, it is possible to flue props up Support protruding 1213 leans with the board plane of heat exchanger plates and contact connection, prevents flatulence of heat type from deforming, discharge fume and Heat catalysis flows to be mutually perpendicular to, and carries out in staggered adverse current in flowing through board-like heat exchange module 12 Heat exchange；

As shown in Figure 4, circumferential passageway 1212 is divided into import and export passage and folding journey by pass partition 1211 Passage, importing and exporting channel width can be identical with folding journey channel width, it is also possible to different；Each journey channel width Degree can be identical, it is also possible to different；Folding number of passes and every journey channel width can be adjusted as required；

In medium road, the both sides support protrusion 1214 forming circumferential passageway 1212 after two heat exchanger plates overlappings Electric resistance welding or bonding connection is carried out with the medium road support protrusion 1214 as pass partition 1211, Circumferential passageway 1212 both sides sequential welding forms the medium folding Cheng Liudao sealed, and pass partition 1211 is permissible It is pressed into contact with connection, sequential welding, intermittent weld or multiple spot welding, forms internal tool Packed many journeys folding journey The heat exchanger plates of runner is to 121；Heat exchanger plates to the heat catalysis pressure in 121 more than heat exchanger plates to 121 Between smoke evacuation pressure；Heat exchanger plates the flue support protrusion 1213 between 121 is abutted or Flue support protrusion 1213 and board plane against, formed and flow to parallel smoke evacuation once-through with discharging fume Passage；Medium road support protrusion 1214 and flue support protrusion 1213 can be that punching press ripple is protruding, weld Muscle or plate muscle, medium road support protrusion 1214 and flue support protrusion 1213 are symmetrically or non-symmetrically, I.e. the protruding degree of depth of heat exchanger plates both sides can be equal, it is possible to；Projection can be various corrugated form, matchmaker Jie road support protrusion 1214 and flue support protrusion 12133 not only can form heat catalysis and smoke evacuation Passage, can mutually support simultaneously, improves heat exchanger plates and bears the ability of pressure at both sides difference, prevents heat exchanger plates The problem of the seal failure that deformation causes, and board-like heat exchange module 12 can be independently real as one Now sealing the module of heat exchange, be not required to be formed with housing 10 side seal, therefore, longtime running can Lean on, it is easy to carry out modularization assembling and large-scale production；

Heat exchanger plates can use carbon steel, rustless steel, titanium and alloy thereof, nickel and nickel-base alloy thereof or other steel Planting or non-ferrous metal, its temperature resistant range is at-196～1200 DEG C.

Therefore, compared with prior art, former cigarette initially enters cooling heat exchanger 2 to the MGGH of this invention With heat transfer medium generation heat exchange, it is achieved cooling, the former cigarette temperature after cooling reduces, and flow subtracts simultaneously Little, it is possible to carry out fully in the desulfurating dust-removing equipment 8 being positioned at cooling heat exchanger 2 front end fully Desulfurization and dedusting, effectively reduce the sulfur content of smoke evacuation；After heat catalysis absorbs heat in cooling heat exchanger 2, Being driven by circulating pump 5 and flow in closed circulation, heat release in temperature rise heat exchanger 1, to process After neat stress heating, improve neat stress exhaust temperature, prevent the Vapor adsorption that neat stress is condensed Corrosion flue or chimney, makes neat stress be more easy to, dissipate in the more rapid high-altitude that rises to；Therefore, this heat exchange system System can realize low power consuming fume treatment, and fume treatment effect is notable, meanwhile, simple in construction, put into and Operating cost is low, uses reliable；

As in figure 2 it is shown, smoke evacuation is when cooling heat exchanger 2 and temperature rise heat exchanger 1, enter in its taper Under the guide effect of cigarette guide cylinder 142, smoke evacuation is evenly distributed at board-like heat exchange module 12 flow field, There is weighing apparatus phenomenon uneven in temperature in wall, improves heat exchange efficiency；Discharge fume in heat exchange module and heat transfer matchmaker Being situated between and carry out many journeys and interlock countercurrent flow, the area that contacts with each other is big, and therefore, heat exchange stroke can be largely Shortening, the structure of heat exchanger is compacter, it is easier to be arranged on smoke discharging pipe or chimney；Heat exchanger plates Being parallel to smoke evacuation flow to arrange, smoke evacuation resistance is little, meanwhile, is prone to clear up and tie up inside heat exchanger Protect；Heat exchanger plates is respectively provided on two sides with support protrusion, not only can form heat catalysis and discharge flue 13, Also can improve heat exchanger plates simultaneously and bear the ability of pressure at both sides difference.

As it is shown in figure 1, be equipped with in the discharge flue 13 of temperature rise heat exchanger 1 and cooling heat exchanger 2 Temperature transmitter, medium heater 6 is also associated with heating electromagnetic valve 7, and closed circulation is additionally provided with The medium import 17 of connection cooling heat exchanger 2 and a bypass branch of media outlet 16, bypass branch Being provided with bypass solenoid valve 3, the temperature transmitter on temperature rise heat exchanger 1 is electrical with heating electromagnetic valve 7 Connecting, the temperature transmitter in cooling heat exchanger 2 is electrically connected with bypass solenoid valve 3, heating electromagnetic Valve 7 and bypass solenoid valve 3 start medium heater 6 according to the exhaust gas temperature in discharge flue 13 respectively Or bypass branch, on the basis of meeting fume treatment requirement, save the unnecessary energy further and disappear Consumption.

Pass partition 1211 at least one in this example, the folding number of passes of heat catalysis folding Cheng Liudao is even Number, heat catalysis imports and exports and is being positioned at housing 10 side with, header box 15, compact conformation, Dismountable header box cover plate 18 also can be provided with, it is simple to cleaning and access panel in the side of header box 15 Runner in formula heat exchange module 12, header box 15 is internal is provided with dividing plate 19, and dividing plate 19 will conflux Completely cut off into the inlet distribution district connected with medium import 17 in case 15 and connect with media outlet 16 Outlet doab；When pass partition 1211 is even number, medium just completes in circumferential passageway 1212 Odd-times folding journey, medium is imported and exported in different edge, and turnover flow direction is identical, and header box 15 is by position Two housing parts 10 in housing 10 both sides form.

As shown in Figure 4, when heat catalysis is reverse flow, plate package poststack, vertical direction is made For the import and export passage of smoke evacuation, i.e. discharge fume and guide and enter from below by entering cigarette guide cylinder 142, once flow Crossing plate, flow out from top, heat catalysis transverse reciprocating folding Cheng Liudong, below side, the first journey is led to Road junction enters, and after repeatedly rolling over journey, above side, the first journey passway is flowed out, i.e. low-temperature receiver turnover For reverse flow；Certainly both flow directions can also be inverted, with the flow direction the former described for Preferably.

As it is shown in figure 5, when heat catalysis is for forward flowing, plate package poststack, vertical direction is made For smoke evacuation import and export passage, i.e. discharge fume by enter cigarette guide cylinder 142 guide from top enter, once flow Crossing plate, from flowing out below, heat catalysis transverse reciprocating folding Cheng Liudong, below side one end first Journey passway enters, and after repeatedly rolling over journey, above the side other end, the first journey passway is flowed out, I.e. heat catalysis passes in and out as forward to flow；Certainly both flow directions can also be inverted.

In this example, the other end of board-like heat exchange module 12 and housing 10 are for flexibly connecting, when being heated, Each heat transfer plate in board-like heat exchange module 12 expands deformation, and mutually extruding easily occurs to seal to lose Effect and dielectric leakage mix, and heat exchanger effect was lost efficacy, the other end of board-like heat exchange module 12 and shell Presetting plastic deformation space between body 10, absorb flatulence of heat type deformation, improve the condenser life-span, flexibility is even Connect and can realize by being provided with elastomer between the other end of board-like heat exchange module 12 and housing 10, bullet Gonosome is spring or rubber, it is possible to by between the other end and the housing 10 of board-like heat exchange module 12 Arrange flexible board 11 to realize, as it is shown on figure 3, flexible board 11 includes that bending forms card and is against board-like heat Exchange module 12 end angle on L-shaped backup plate 113 and housing 10 side be adjacent to location fixed plate 111 And connect L-shaped backup plate 113 and the bending bent plate 112 of fixed plate 111.

The above is only the preferred embodiment of the present invention, it is noted that for the art For those of ordinary skill, under the premise without departing from the principles of the invention, it is also possible to make some improvement And retouching, these improvements and modifications also should be regarded as protection scope of the present invention.

Claims (7)

1. a MGGH heat-exchange system, it is characterised in that: include being set in turn in smoke discharge pipe On temperature rise heat exchanger (1), desulfurating dust-removing equipment (8) and cooling heat exchanger (2), pipeline connect The medium import (17) of temperature rise heat exchanger (1) and the media outlet (16) of cooling heat exchanger (2), And pipeline connects media outlet (16) and the matchmaker of cooling heat exchanger (2) of temperature rise heat exchanger (1) Jie's import (17), forms the closed circulation of heat catalysis, and closed circulation is provided with medium Compensating tank (4), circulating pump (5) and medium heater (6)；Wherein, temperature rise heat exchanger (1) All include with cooling heat exchanger (2):

Housing (10), its upper and lower end is provided with fume inlet passage (14) and discharge flue (13), enters cigarette Passage (14) is by suction flange (141) and enters cigarette guide cylinder (142) and constitutes, discharge flue (13) It is made up of outlet(discharge) flange (131) and smoke evacuation guide cylinder (132), enters cigarette guide cylinder (142) and row The inwall of cigarette guide cylinder (132) is provided with leads cigarette gradient；

The header box (15) connected with housing (10), described medium import (17) and media outlet (16) its two ends it are respectively arranged on；

And it is positioned at the board-like heat exchange module (12) that housing (10) is internal, its one end and header box (15) connect, board-like heat exchange module (12) include several be parallel to discharge fume direction evenly distributed Heat exchanger plates, heat exchanger plates be respectively provided on two sides with flue support protrusion (1213) and medium road support protrusion (1214), medium road support protrusion (1214) of adjacent heat exchanger plates leans or medium road supports convex Rise (1214) lean with the board plane of heat exchanger plates and be connected, formed connect medium import (17) and The heat catalysis folding Cheng Liudao of the sealing of media outlet (16), heat catalysis folding Cheng Liudao includes several There is circumferential passageway (1212) that standalone media imports and exports and make in being arranged on circumferential passageway (1212) Heat catalysis circumferentially passage (1212) back and forth rolls over the pass partition (1211) of Cheng Liudong, adjacent changes Smoke evacuation once-through passage is formed between the flue support protrusion (1213) of hot plate.

A kind of MGGH heat-exchange system the most according to claim 1, it is characterised in that described It is equipped with temperature pick-up in the discharge flue (13) of temperature rise heat exchanger (1) and cooling heat exchanger (2) Device, described medium heater (6) is also associated with heating electromagnetic valve (7), described closed circulation It is additionally provided with medium import (17) and one side of media outlet (16) of connection cooling heat exchanger (2) Logical branch road, bypass branch is provided with bypass solenoid valve (3), the temperature on described temperature rise heat exchanger (1) Degree transmitter is electrically connected with heating electromagnetic valve (7), and the temperature in described cooling heat exchanger (2) becomes Device is sent to be electrically connected with bypass solenoid valve (3).

A kind of MGGH heat-exchange system the most according to claim 1, it is characterised in that described Pass partition (1211) at least one, the folding number of passes of described heat catalysis folding Cheng Liudao is even number, Described header box (15) is positioned at housing (10) side, and is internally provided with dividing plate (19), dividing plate (19) completely cut off into, by described header box (15), the inlet distribution district connected with medium import (17) And the outlet doab connected with media outlet (16).

A kind of MGGH heat-exchange system the most according to claim 1, it is characterised in that described Pass partition (1211) at least one, the folding number of passes of described heat catalysis folding Cheng Liudao is odd number, Described header box (15) is made up of two housing parts (10) being positioned at housing (10) both sides.

5. according to a kind of MGGH heat-exchange system described in claim 1, it is characterised in that institute State medium road support protrusion (1214) and flue support protrusion (1213) is that punching press ripple is protruding, welds Muscle or plate muscle.

The board-like low-level (stack-gas) economizer of one the most according to any one of claim 1 to 5, its feature It is, between the other end and the housing (10) of described board-like heat exchange module (12), is provided with elastomer, Described elastomer is spring or rubber.

The board-like low-level (stack-gas) economizer of one the most according to any one of claim 1 to 5, its feature It is, between the other end and the housing (10) of described board-like heat exchange module (12), is provided with flexible board (11), described flexible board (11) includes that one-body molded formation card is against board-like heat exchange module (12) The L-shaped backup plate (113) on angle and housing (10) side is held to be adjacent to the fixed plate (111) of location And connect L-shaped backup plate (113) and the bending bent plate (112) of fixed plate (111).