CN113758315B

CN113758315B - Plate-fin heat exchanger for waste gas heat exchange

Info

Publication number: CN113758315B
Application number: CN202111028792.XA
Authority: CN
Inventors: 王秀丽; 刘蛟; 韩彬; 史坤昊
Original assignee: Changzhou Bingrui Heat Exchanger Technology Co ltd
Current assignee: Changzhou Bingrui Heat Exchanger Technology Co ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2023-08-29
Anticipated expiration: 2041-09-02
Also published as: CN113758315A

Abstract

The application relates to the field of heat exchangers, in particular to a plate-fin heat exchanger for waste gas heat exchange, which comprises a sliding scraping assembly respectively arranged in an inner channel and an outer channel, wherein the sliding scraping assembly comprises a plurality of scraping pieces sliding in the corresponding channels, the plurality of scraping pieces are arranged along the length direction of the corresponding channels, the scraping pieces are closely attached to corresponding partition plates and corresponding fins, a plurality of water passing holes are formed in the scraping pieces, a pressure spring is arranged between every two adjacent scraping pieces, fixing plates are arranged at two ends of the inner channel and the outer channel, a space is reserved between the two ends of the inner channel and the two ends of the outer channel, and the scraping pieces at the two ends of the sliding scraping assembly are respectively arranged on the corresponding fixing plates through the pressure spring. The application has the advantage of convenient impurity removal.

Description

Plate-fin heat exchanger for waste gas heat exchange

Technical Field

The application relates to the field of heat exchangers, in particular to a plate-fin heat exchanger for waste gas heat exchange.

Background

Plate-fin heat exchangers are typically composed of baffles, fins, seals, and deflectors. The fin, the guide vane and the seal are placed between two adjacent partition boards to form a sandwich layer called a channel, the sandwich layers are stacked according to different modes of fluid, and the sandwich layers are brazed into a whole to form a plate bundle, wherein the plate bundle is the core of the plate-fin heat exchanger.

The Chinese patent with the publication number of CN210533124U discloses an aluminum plate-fin type fuel cooler, which comprises a cooler box body, wherein a cooler core body is arranged in the cooler box body, the cooler core body comprises two side plates which are vertically spaced and are opposite to each other, inner channel assemblies and outer channel assemblies are uniformly and alternately distributed between the two side plates, a partition plate is arranged between the inner channel assemblies and the outer channel assemblies, and the partition plate and the side plates are arranged in parallel; the inner channel component consists of an inner fin and long seals on the left side and the right side of the inner fin, and an inner channel running forwards and backwards is arranged in the inner fin; the outer channel component consists of outer fins and short seals on the front side and the rear side of the outer fins; an outer channel which is left and right is arranged in the outer fin; the inner channel component and the outer channel component are in an upper-lower overlapped vertical structure.

In the use process of the cooler, fluid passes through the inner channel and the outer channel, however, impurities possibly exist in the fluid, and the impurities are attached to the corresponding partition plates, the inner fins and the outer fins and gradually increase along with the time, so that the heat exchange effect is affected.

For this reason, when the cooler is used for a certain period of time, it needs to be disassembled and cleaned of impurities. At present, impurities on the partition plate, the inner fins and the outer fins are usually removed one by one manually by workers, so that certain inconvenience and obvious defects exist.

Disclosure of Invention

In order to facilitate impurity removal, the application provides a plate-fin heat exchanger for waste gas heat exchange.

The application provides a plate-fin heat exchanger for waste gas heat exchange, which adopts the following technical scheme:

the utility model provides a waste gas is plate-fin heat exchanger for heat exchange, includes the slip scraping subassembly that sets up respectively in interior passageway and outer passageway, the slip scraping subassembly includes that a plurality of slides the doctor-bar in corresponding passageway, a plurality of the doctor-bar sets up along the length direction of corresponding passageway, the doctor-bar all hugs closely with the baffle that corresponds the doctor-bar with the fin that corresponds, it has a plurality of water holes to open on the doctor-bar, adjacent two be provided with the pressure spring between the doctor-bar, interior passageway with the both ends of outer passageway all are provided with the fixed plate and have the interval between, the slip scraping subassembly is at the extreme both ends the doctor-bar passes through respectively the pressure spring sets up corresponding on the fixed plate.

Through adopting above-mentioned technical scheme, during the clearance, the workman pulls down the heat exchanger and forward intercommunication in the water system among the prior art, and clear water gets into in outer passageway and the interior passageway, passes from the water hole on each doctor-bar in proper order, flows outer passageway and interior passageway. In the process of the clear water flowing in the channel, a certain impact can be formed on the scraping blade, the scraping blade is impacted by the clear water to slide along the flowing direction of the clear water, so that impurities attached to the partition plate and the fins are scraped, and the scraped impurities are brought out of the heat exchanger by the clear water. And then the heat exchanger is reversely communicated in the water system, so that the scraping blade reversely scrapes the impurities, and the comprehensiveness of impurity scraping is improved. Through the mode, the heat exchanger does not need to be split, so that impurities in the heat exchanger can be removed, the operation is convenient, and labor and time are saved.

Optionally, the scraping blade is coated with a wear-resistant smooth layer.

Through adopting above-mentioned technical scheme, the smooth layer of inner membrance has increased the surface smoothness of doctor-bar to this makes the doctor-bar slide in corresponding passageway more smoothly.

Optionally, the positions of the outer fin and the inner fin relative to two ends of each channel are connected with limiting strips.

Through adopting above-mentioned technical scheme, spacing plays spacing effect to the doctor-bar, is favorable to reducing the doctor-bar under the impact of clear water, moves out the possibility of corresponding passageway.

Optionally, the inlet end and the outlet end of outer passageway, the inlet end and the outlet end of interior passageway all communicate there is inside hollow kuppe, every the kuppe all communicates there is the two-way water pump of adjustable speed, fixed plate fixed connection is in corresponding in the kuppe, it has a plurality of through-holes to open on the fixed plate.

Through adopting above-mentioned technical scheme, the velocity of flow of clear water can be adjusted to two-way water pump to this adjusts the sliding range of doctor-bar in corresponding passageway, is favorable to improving the effect of doctoring of doctor-bar to impurity.

Optionally, the caliber of the air guide sleeve is gradually reduced along the direction away from the corresponding channel, each air guide sleeve is internally provided with a plurality of air guide plates, and the distance between two adjacent air guide plates is gradually reduced along the direction away from the corresponding channel.

Through adopting above-mentioned technical scheme, the guide plate plays the guide effect to the flow of medium to this makes the medium flow into whole heat exchanger more evenly and smoothly in, can also reduce the medium and strike the fixed plate after simultaneously, produces the possibility of turbulent flow.

Optionally, a water channel is formed in a side wall of the partition corresponding to the water inlet end of the channel, the water channel is formed along the length direction of the channel corresponding to the partition, the partition is closed relative to the other side of the water channel, a plurality of side punching holes are formed in the partition, and the side punching holes are communicated with the water channel and the side punching holes are communicated with the corresponding channels.

Through adopting above-mentioned technical scheme, when the forward clear away impurity, clear water gets into the water course from the kuppe in, then spouts to piling up the impurity in corresponding passageway through the side punching for the impurity is incessantly turned over in the passageway, so that clear water is more easy to take the impurity out of the heat exchanger.

Optionally, the open end of water course is provided with first filter cloth, the water course inner wall is provided with the second filter cloth corresponding to one side of fin.

Through adopting above-mentioned technical scheme, first filter cloth and second filter cloth cooperation can reduce and pile up in the water course to influence the possibility that clear water was spouted from the side blow hole.

Optionally, the baffle includes two plates that hug closely and can dismantle the connection, the water course includes seting up respectively two on the lateral wall is hugged closely each other to the plate body.

Through adopting above-mentioned technical scheme, the workman can be more convenient to the change of second filter cloth realization.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the clean water flows forward and backward in the channel to drive the scraping blade to move, so that impurities attached to the partition plate and the fins are scraped, meanwhile, the flowing clean water can bring the scraped impurities out of the heat exchanger, the heat exchanger is not required to be split, the impurities can be removed, the operation is convenient, and the labor and the time are saved;

2. the bidirectional water pump can adjust the flow rate of clear water, so that the sliding range of the scraping blade in the corresponding channel is adjusted, and the scraping effect of the scraping blade on impurities is improved;

3. when the impurity is positively removed, clean water enters the water channel from the guide cover, and then is sprayed to the impurity piled in the corresponding channel through the side punching holes, so that the impurity continuously turns over in the channel, and the clean water can be more easily brought out of the heat exchanger.

Drawings

FIG. 1 is a schematic diagram of a structure for embodying the present application;

FIG. 2 is a schematic view of a structure for embodying the connection relationship among the fixing plate, the compression spring and the side plate in the present application;

FIG. 3 is an exploded view of the connection relationship between the plate body, the second filter cloth and the inner fins for embodying the present application;

FIG. 4 is an exploded view of the connection between the plate body, the second filter cloth and the outer fins for embodying the present application;

FIG. 5 is a schematic view of the structure of the connection relationship among the outer fins, the limit strips, the compression springs and the wiper blade in the application;

fig. 6 is an exploded view of the connection between the pod, baffle, and retainer plate used in the present application.

Reference numerals illustrate: 1. a cooler housing; 2. a side plate; 3. an inner fin; 4. a long seal; 5. an outer fin; 6. a short seal; 71. a wiper blade; 711. a water passing hole; 72. a pressure spring; 73. a fixing plate; 731. a through hole; 8. a limit bar; 9. a guide cover; 10. a two-way water pump; 11. a deflector; 12. a first filter cloth; 13. a second filter cloth; 14. a plate body; 141. a water tank; 142. and (5) side punching.

Detailed Description

The application is described in further detail below with reference to fig. 1-6.

The embodiment of the application discloses a plate-fin heat exchanger for waste gas heat exchange. Referring to fig. 1 and 2, the plate-fin heat exchanger for exhaust gas heat exchange includes a cooler case 1 having a hollow interior, and a cooler core is provided in the cooler case 1.

Referring to fig. 1 and 2, the cooler core comprises two side plates 2 which are vertically opposite to each other at intervals, wherein inner channel components and outer channel components are uniformly and alternately distributed between the two side plates 2, and the inner channel components and the outer channel components are in an up-down overlapped vertical structure.

Referring to fig. 3 and 4, the inner channel assembly comprises an inner fin 3, long seals 4 positioned at the left side and the right side of the inner fin 3, and partition plates positioned at the upper side and the lower side of the inner fin 3, wherein an inner channel which is in a front-back trend is arranged in the inner fin 3.

The outer channel component comprises an outer fin 5 and short seals 6 positioned on the front side and the rear side of the outer fin 5, the upper side and the lower side of the outer fin 5 are also provided with partition plates, and an outer channel which is left and right is arranged in the outer fin 5.

Referring to fig. 2 and 5, the plate-fin heat exchanger for exhaust gas heat exchange further includes sliding scraper assemblies respectively disposed in the inner and outer channels, the sliding scraper assemblies including a scraper blade 71, a compression spring 72, and a fixing plate 73.

The scraping blade 71 is in sliding fit with the corresponding channel, the scraping blade 71 is closely attached to the corresponding partition plate, the scraping blade 71 is closely attached to the corresponding fin, and a plurality of scraping blades 71 are arranged along the length direction of the corresponding channel.

The doctor blade 71 is coated with a wear-resistant smoothing layer (not shown in the drawings), and the provision of the wear-resistant smoothing layer increases the smoothness of the blade surface, thereby enabling the doctor blade 71 to slide more smoothly in the corresponding channel.

Each scraping blade 71 is provided with a plurality of water passing holes 711, and a pressure spring 72 is fixedly connected between any two adjacent scraping blades 71.

Referring to fig. 2 and 5, the fixing plate 73 is provided at both ends of the inner and outer passages with a space between the ends of the inner and outer passages and the corresponding fixing plate 73. The scraping pieces 71 at the two ends of the sliding scraping component are fixedly connected to the corresponding fixing plates 73 through pressure springs 72.

Referring to fig. 4 and 5, during cleaning, a cleaning person removes the heat exchanger and communicates the heat exchanger forward to a prior art water system (not shown) so that clean water flows forward within the cooler core.

Clear water enters the outer channel from the water inlet of the outer channel, then sequentially passes through the water passing holes 711 on each scraping blade 71 and flows out from the water outlet of the outer channel.

Because clear water has a certain flow velocity in the process of flowing in the outer channel, a certain pushing force can be applied to the scraping blade 71, the scraping blade 71 slides towards the direction close to the water outlet end of the outer channel under the action of the pushing force, and meanwhile, the pressure spring 72 close to the water inlet end of the outer channel is pulled, and the pressure spring 72 close to the water outlet end of the outer channel is pressed.

In the sliding process of the scraping blade 71, impurities attached to the corresponding partition plate and the outer fins 5 can be scraped, and clean water can be taken out of the cooler core body through the water passing holes 711, so that the forward cleaning of the impurities is realized.

When the clear water stops flowing in the forward direction in the channel, the deformation force of the pressure spring 72 drives each scraping blade 71 to automatically reset. Since the flow rate of clear water is limited, the range of unidirectional slip of each blade 71 is limited, and for this reason, reverse cleaning is also required.

During reverse cleaning, only the heat exchanger is reversely communicated in the water system, so that clear water reversely flows in the outer channel, the scraping blade 71 reversely slides, and the scraping blade 71 can reversely scrape impurities.

The principle and the method for removing impurities in the inner channel and the outer channel are communicated, so that the forward and reverse scraping movement of the channel can be realized through the sliding scraping assembly, impurities in the channel can be removed, and the heat exchange effect of the heat exchanger is further improved.

When the impurity is removed from the heat exchanger in the mode, the impurity is removed by virtue of the sliding scraping assembly, the heat exchanger is not required to be split manually, and each part is cleaned independently, so that the operation is convenient, and the consumed labor and time can be saved.

Referring to fig. 3 and 5, the positions of the outer fin 5 and the inner fin 3 opposite to the two ends of each channel are fixedly connected with a limit bar 8, and the limit bar 8 is used for limiting the doctor blade 71, so that the possibility that the doctor blade 71 slides out of the corresponding channel and is difficult to automatically reset when moving forward and backward is reduced.

Referring to fig. 1 and 6, the positions of the cooler box 1 relative to the inner channel water inlet end, the inner channel water outlet end, the outer channel water inlet end and the outer channel water outlet end are all communicated with the hollow guide covers, the fixing plates 73 are fixedly connected in the corresponding guide covers 9, and a plurality of through holes 731 are formed in the fixing plates 73.

After entering the guide cover 9, the clear water passes through the through holes 731 on the fixing plate 73 and then flows into the corresponding channels.

Referring to fig. 5 and 6, each guide cover 9 is communicated with a speed-adjustable bidirectional water pump 10 in the prior art, and the flow rate of clean water is adjusted through the arrangement of the bidirectional water pump 10, so that the length of a moving path of the scraping blade 71 in a corresponding channel can be adjusted, and the scraping effect on impurities is improved.

Referring to fig. 5 and 6, the air guide covers 9 are arranged in a rectangular pyramid shape, the caliber of the air guide covers is gradually reduced along the direction away from the corresponding channel, a plurality of air guide plates 11 are fixedly connected in each air guide cover 9, and the distance between two adjacent air guide plates 11 is gradually reduced along the direction away from the corresponding channel.

The baffle 11 guides the flow of the medium so that the medium can flow relatively uniformly and smoothly into the entire cooler core, and at the same time, the possibility of turbulence after the medium hits the fixing plate 73 can be reduced.

Referring to fig. 4 and 5, since the foreign matter scraped off by the wiper 71 has a certain volume, the foreign matter is easily accumulated in the passage by gravity and causes clogging.

For this reason, a water channel is formed on the side wall of the partition corresponding to the water inlet end of the channel, the water channel is formed along the length direction of the partition corresponding to the channel, the partition is closed relative to the other side of the water channel, a plurality of side punching holes 142 are formed in the partition, and the side punching holes 142 are communicated with the water channel and the side punching holes 142 and the corresponding channels.

In the process of removing impurities or normally using the heat exchanger, the medium flows into the water channel and then is sprayed out from the side punching holes 142, so that impact is formed on the impurities accumulated in the channel, the impurities are impacted and continuously roll, the medium can more easily bring the impurities out of the core body of the cooler, and the service life and effect of the heat exchanger are further improved.

Referring to fig. 4 and 5, the open end of the water channel is adhered with a first filter cloth 12, one side of the inner wall of the water channel corresponding to the corresponding fin is adhered with a second filter cloth 13, and the arrangement of the first filter cloth 12 and the second filter cloth 13 is beneficial to reducing the possibility of accumulation of impurities in the water channel.

When the heat exchanger is being used, impurities may adhere to the side of the first filter cloth 12 facing away from its corresponding water channel, thereby causing a certain obstruction to the passage of the clean water medium through the first filter cloth 12.

When the impurities are reversely removed, the medium can enter the water channel from the side punching holes 142 and then reversely pass through the first filter cloth 12, so that the impurities attached to the first filter cloth 12 are backflushed, and the filtering effect and the service life of the first filter cloth 12 are improved.

Referring to fig. 4 and 5, the partition plate includes two closely attached and bolted plate bodies 14, the water channel includes water tanks 141 respectively opened on the side walls of the two plate bodies 14 closely attached to each other, and the partition plate is separately arranged, so that a worker can more conveniently replace the second filter cloth 13.

The implementation principle of the plate-fin heat exchanger for waste gas heat exchange in the embodiment of the application is as follows: the cleaning personnel detach and forward communicate the heat exchanger into the water system. Clear water enters the outer channel from the water inlet of the outer channel, then sequentially passes through the water passing holes 711 on each scraping blade 71 and flows out from the water outlet of the outer channel. The clear water drives the scraping blade 71 to slide in the direction close to the water outlet end of the outer channel in the flowing process. During the sliding of the wiper blade 71, impurities adhering to the corresponding separator and the outer fin 5 can be scraped off. The clear water flows into the water channel and then is sprayed out from the side punching holes 142, so that impact is formed on impurities accumulated in the outer channel, the impurities are impacted and continuously roll, the clear water brings the impurities in the outer channel out of the cooler core, and the forward cleaning of the impurities is realized. When the clear water stops flowing in the outer channel, the deformation force of the pressure spring 72 drives each scraping blade 71 to automatically reset.

During reverse cleaning, only the heat exchanger is reversely communicated in the water system, so that clear water reversely flows in the outer channel, the scraping blade 71 reversely slides, and the scraping blade 71 can reversely scrape impurities. The impurity removing mode in the inner channel is the same as that in the outer channel, so that the description is omitted.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The utility model provides a waste gas is board fin heat exchanger for heat exchange, includes two curb plates, and even upper and lower alternating distribution has interior channel subassembly and outer channel subassembly between two curb plates, is equipped with the baffle between interior channel subassembly and the outer channel subassembly, and interior channel subassembly includes the long strip of paper used for sealing of interior fin and left and right sides thereof, is equipped with interior passageway in the interior fin, and outer channel subassembly includes the short strip of paper used for sealing of outer fin and front and back both sides thereof, is equipped with outer passageway in the outer fin, its characterized in that: the sliding scraping device comprises a sliding scraping component, wherein the sliding scraping component is arranged in an inner channel and an outer channel respectively, the sliding scraping component comprises a plurality of scraping blades (71) sliding in the corresponding channels, the scraping blades (71) are arranged along the length direction of the corresponding channels, the scraping blades (71) are tightly attached to corresponding partition plates and corresponding fins, a plurality of water passing holes (711) are formed in the scraping blades (71), a pressure spring (72) is arranged between every two adjacent scraping blades (71), fixing plates (73) are arranged at two ends of each inner channel and each outer channel respectively, a distance is reserved between every two ends of each inner channel and each outer channel, and the scraping blades (71) at the two ends of each sliding scraping component are arranged on the corresponding fixing plates (73) through the pressure springs (72).

2. The plate-fin heat exchanger for heat exchange of exhaust gas according to claim 1, wherein: the scraping blade (71) is coated with a wear-resistant smooth layer.

3. The plate-fin heat exchanger for heat exchange of exhaust gas according to claim 1, wherein: the positions of the outer fins (5) and the inner fins (3) relative to the two ends of each channel are connected with limiting strips (8).

4. The plate-fin heat exchanger for heat exchange of exhaust gas according to claim 1, wherein: the liquid inlet end and the liquid outlet end of the outer channel, the liquid inlet end and the liquid outlet end of the inner channel are all communicated with inner hollow air guide covers (9), each air guide cover (9) is all communicated with a speed-adjustable bidirectional water pump (10), the fixing plate (73) is fixedly connected in the corresponding air guide cover (9), and a plurality of through holes (731) are formed in the fixing plate (73).

5. The plate-fin heat exchanger for heat exchange of exhaust gas according to claim 4, wherein: the air guide covers (9) gradually become smaller along the direction away from the corresponding channels, a plurality of air guide plates (11) are arranged in each air guide cover (9), and the distance between every two adjacent air guide plates (11) gradually becomes smaller along the direction away from the corresponding channels.

6. The plate-fin heat exchanger for heat exchange of exhaust gas according to claim 1, wherein: the side wall of the partition plate corresponding to the water inlet end of the channel is provided with a water channel, the water channel is arranged along the length direction of the channel corresponding to the partition plate, the partition plate is closed relative to the other side of the water channel, the partition plate is provided with a plurality of side punching holes (142), and the side punching holes (142) are communicated with the water channel and the side punching holes (142) and the corresponding channels.

7. The plate-fin heat exchanger for heat exchange of exhaust gas according to claim 6, wherein: the open end of the water channel is provided with a first filter cloth (12), and one side of the inner wall of the water channel corresponding to the fins is provided with a second filter cloth (13).

8. The plate-fin heat exchanger for heat exchange of exhaust gas according to claim 6, wherein: the partition plate comprises two plate bodies (14) which are tightly attached and detachably connected, and the water channel comprises water tanks (141) which are respectively arranged on the side walls of the two plate bodies (14) which are tightly attached to each other.