CN213396679U

CN213396679U - Silicon carbide heat exchange plate and heat exchanger thereof

Info

Publication number: CN213396679U
Application number: CN202021969984.1U
Authority: CN
Inventors: 关德军; 张美凤; 马喜强
Original assignee: Shandong Wintech Technology Co ltd
Current assignee: Shandong Wintech Technology Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-06-08
Anticipated expiration: 2030-09-10

Abstract

The utility model relates to a carborundum heat transfer board and heat exchanger thereof, the heat transfer board includes the carborundum slab, is equipped with the cavity in the carborundum slab, and carborundum slab both ends are equipped with the defeated water hole of intercommunication cavity, and carborundum slab both ends are fixed with a collection liquid shell, and both sides collection liquid shell outside is connected with the takeover. The heat exchanger includes the foretell carborundum heat transfer board of polylith and holds the heat transfer box of installation it, and both ends are equipped with flue gas inlet pipeline and exhanst gas outlet pipe way around the heat transfer box. The utility model discloses use carborundum heat transfer board, have high corrosion-resistant, anti-oxidant, erosion resistance can, have splendid life. The problem of low-temperature dew point corrosion in the field of heat exchangers is effectively solved, and the heat conducting performance is better.

Description

Silicon carbide heat exchange plate and heat exchanger thereof

Technical Field

The utility model relates to a carborundum heat transfer board and heat exchanger thereof belongs to heat transfer technical field.

Background

In the field of low-temperature waste heat recovery heat exchangers, the heat exchange between smoke and air or media such as water is carried out to achieve the effects of reducing the temperature of the smoke and improving the temperature of the air or the water, the heat exchangers have various forms and mainly comprise a plate type heat exchanger and a tubular type heat exchanger, the plate type heat exchanger is mainly of a stainless steel plate type, and the tubular type heat exchanger is mainly of an enamel tubular type. However, the temperature of the flue gas outlet is generally over 120 ℃, and equipment is corroded and scrapped due to low-temperature dew point corrosion when the temperature of the flue gas outlet is reduced, so that the problem of low-temperature dew point corrosion is always a difficult problem in the industry of low-temperature waste heat recovery heat exchangers.

SUMMERY OF THE UTILITY MODEL

The utility model provides a carborundum heat transfer board and heat exchanger thereof solves present low temperature dew point corrosion and leads to indirect heating equipment to corrode condemned problem.

The utility model provides a carborundum heat transfer board, including the carborundum slab, be equipped with the cavity in the carborundum slab, carborundum slab both ends are equipped with the defeated water hole of intercommunication cavity, and carborundum slab both ends are fixed with a liquid collection shell, and both sides collect the liquid shell outside and are connected with the takeover. The heat exchange plate is a silicon carbide plate which has extremely high corrosion resistance, oxidation resistance and erosion resistance, and can resist sulfuric acid, nitric acid, phosphoric acid mixed acid, strong base, oxidant and the like. Is a ceramic material which can resist the corrosion of hydrofluoric acid and has excellent service life. The thermal conductivity of silicon carbide is about 140W/mK, and the thermal conductivity of stainless steel is about 16W/mK. Therefore, the heat conduction effect of the silicon carbide plate is better than that of the stainless steel plate. Has good acid resistance effect, and effectively solves the problem of low-temperature dew point corrosion in the field of heat exchangers.

Preferably, positioning bulges are fixed at two ends of the liquid collection shell. The heat exchange plate is convenient to install and position.

Preferably, both sides the liquid collecting shell outside be fixed with the interface nipple joint, liquid collecting shell and location arch be integrated into one piece, are equipped with the annular groove on the interface nipple joint outer wall, are equipped with sealing washer one in the annular groove, also are equipped with the annular groove who holds sealing washer one on the inner wall of takeover. The connecting structure is simple and convenient, and the sealing effect is better. The liquid collecting shell is made of plastic.

Preferably, an annular groove is formed in the outer wall of the outer end of the connecting pipe, and a second sealing ring is arranged in the annular groove. The sealing effect is better.

The utility model also provides a carborundum heat exchanger, including the foretell carborundum heat transfer board of polylith and hold the heat transfer box of installation it, both ends are equipped with flue gas inlet pipeline and exhanst gas outlet pipeline around the heat transfer box. The heat exchanger carries out the heat exchange with the flue gas in the heat transfer box, and during the exchange, the heat transfer board is carborundum heat transfer board, can prevent low temperature dew point corrosion, and heat exchange efficiency is higher.

Preferably, the heat exchange box body comprises tube plates arranged on the left side and the right side of the silicon carbide heat exchange plate and box plates fixed on the upper side and the lower side of the tube plates, through holes for the connection tubes to penetrate are formed in the tube plates, annular grooves for containing the second sealing rings are formed in the through holes, the sealing effect is better, smoke leakage is prevented, tube boxes are fixed on the outer sides of the tube plates, the outer ends of the connection tubes extend into the tube boxes, the tube boxes on one side are provided with liquid inlets, the tube boxes on the other side are provided with liquid.

Preferably, the front side and the rear side of the silicon carbide heat exchange plate are provided with positioning plates fixed with the tube plate, and the positioning plates are provided with positioning holes matched with the positioning protrusions, so that the silicon carbide heat exchange plate is convenient to install, position and fix.

Preferably, the flue gas inlet pipeline and the flue gas outlet pipeline are both reducer pipes with the outer side calibers smaller than the inner side calibers, and the flue gas inlet pipeline and the flue gas outlet pipeline are fixed at two ends of the pipe plate and the box plate. The reducer pipe can increase the heat exchange space as much as possible on the basis of not increasing the smoke conveying caliber.

Preferably, the outer ends of the flue gas inlet pipeline and the flue gas outlet pipeline are both fixed with connecting flange pipes, so that the connection is convenient.

The adapter tubes on two sides can be changed into long plastic hoses made of PTFE or PA materials, the tube plates and the tube boxes on two sides can be changed into water inlet and outlet collecting tubes on two sides, a row of water inlet or outlet interfaces are arranged on the collecting tubes, one end of each long plastic hose is connected with the interface short section on the silicon carbide plate, and the other end of each long plastic hose is connected to the collecting tube, so that water enters from one end of the collecting tube, enters the silicon carbide plate through the long plastic hose, and flows out of the collecting tube on the other side through the long plastic hose on the other end after exchanging heat with flue gas, and.

The utility model discloses, following beneficial effect has:

the silicon carbide heat exchange plate has extremely high corrosion resistance, oxidation resistance and erosion resistance, and has excellent service life. The problem of low-temperature dew point corrosion in the field of heat exchangers is effectively solved, and the heat conducting performance is better.

Drawings

Fig. 1 is a schematic structural view of a silicon carbide heat exchange plate of the present invention;

FIG. 2 is a schematic view of the split structure of the silicon carbide heat exchange plate of the present invention;

FIG. 3 is a schematic structural diagram of a heat exchange box body;

FIG. 4 is a schematic diagram of the internal structure of the heat exchange box;

FIG. 5 is a schematic diagram of a heat exchanger;

FIG. 6 is a schematic view of the water hole;

in the figure: 1. a silicon carbide sheet; 2. taking over a pipe; 3. a liquid collection shell; 4. positioning the projection; 5. a connector nipple; 6. a tube sheet; 7. a pipe box; 8. positioning a plate; 9. a boxboard; 10. a first sealing ring; 11. a second sealing ring; 12. a flue gas inlet duct; 13. a flue gas outlet duct; 14. connecting a flange pipe; 15. a water delivery hole.

Detailed Description

The present invention will be further described with reference to the following examples.

Embodiment 1, as shown in fig. 1, fig. 2 and fig. 6, the utility model relates to a carborundum heat transfer board, including carborundum slab 1, be equipped with the cavity in the carborundum slab 1, carborundum slab 1 both ends are equipped with the water delivery hole 15 of intercommunication cavity, and 1 both ends of carborundum slab are fixed with

album liquid shell

3, and 3 outsides of both sides album liquid shell are connected with takeover 2.

And positioning bulges 4 are fixed at two ends of the liquid collecting shell 3.

Both sides 3 outside of collection liquid shell be fixed with interface nipple joint 5, collection liquid shell 3 and location arch 4 are integrated into one piece, are equipped with the annular groove on the 5 outer walls of interface nipple joint, are equipped with sealing washer one 10 in the annular groove, also are equipped with the annular groove who holds sealing washer one 10 on the inner wall of takeover 2.

An annular groove is formed in the outer wall of the outer end of the connecting pipe 2, and a second sealing ring 11 is arranged in the annular groove.

The silicon carbide plate has extremely high corrosion resistance, oxidation resistance and erosion resistance, and can resist sulfuric acid, nitric acid, phosphoric acid mixed acid, strong base, oxidant and the like. Is a ceramic material which can resist the corrosion of hydrofluoric acid and has excellent service life. The thermal conductivity of silicon carbide is about 140W/mK, and the thermal conductivity of stainless steel is about 16W/mK. Therefore, the heat conduction effect of the silicon carbide plate is better than that of the stainless steel plate. Has good acid resistance effect, and effectively solves the problem of low-temperature dew point corrosion in the field of heat exchangers. The liquid collection shell 3, the interface short section 5 and the positioning protrusion 4 are made of plastic materials, the temperature resistance is 200 ℃, and the first sealing ring 10 and the second sealing ring 11 are made of rubber materials.

The thickness of the silicon carbide plate 1 is about 6mm, the size of the water conveying hole 15 is about 3x3mm, and the size of the water flowing channel can be adjusted. Two ends of the silicon carbide plate 1 are respectively stuck with a plastic liquid collecting shell 3. One side of the liquid collecting shell 3 is bonded with the plate, and the other side is provided with an interface short section 5 for water inlet and outlet. The joint of the interface short section 5 and the connecting pipe is sealed by glue. The sealant can resist the temperature of 200 ℃, and sealants with different temperature resistant ranges can be adopted according to actual working conditions.

Embodiment 2, as shown in fig. 1 to 6, the utility model relates to a silicon carbide heat exchanger, including the silicon carbide heat transfer board in polylith embodiment 1 and the heat transfer box body that holds installation it, both ends are equipped with flue gas inlet pipeline 12 and exhanst gas outlet pipeline 13 around the heat transfer box body.

The heat exchange box body comprises tube plates 6 arranged on the left side and the right side of the silicon carbide heat exchange plate and box plates 9 fixed on the upper side and the lower side of the tube plates 6, through holes for the connection tubes 2 to penetrate through are formed in the tube plates 6, annular grooves for accommodating the sealing rings II 11 are formed in the through holes, tube boxes 7 are fixed on the outer sides of the tube plates 6, the outer ends of the connection tubes 2 extend into the tube boxes 7, a liquid inlet is formed in the tube box 7 on one side, and a liquid outlet is formed.

Locating plates 8 fixed with the tube plates 6 are arranged on the front side and the rear side of the silicon carbide heat exchange plate, and locating holes matched with the locating protrusions 4 are formed in the locating plates 8.

The flue gas inlet pipeline 12 and the flue gas outlet pipeline 13 are both reducer pipes with the outer side caliber smaller than the inner side caliber, and the flue gas inlet pipeline 12 and the flue gas outlet pipeline 13 are fixed at two ends of the tube plate 6 and the box plate 9.

And the outer ends of the flue gas inlet pipeline 12 and the flue gas outlet pipeline 13 are both fixed with connecting flange pipes 14.

Wherein, the heat exchange box body is provided with a through hole at the corresponding position of the tube plate 6 according to the flow and the trend of water in the heat exchanger, so that the connecting tube 2 can pass through the through hole. The joint of the connecting pipe 2 and the outer side of the pipe plate 6 is sealed by sealant. The positioning bulge 4 is used for positioning the plate in the plate assembling process, and the positioning plate 8 is provided with a hole corresponding to the position of the positioning bulge 4. The medium flowing out of the silicon carbide plate 1 is flue gas or air.

In the installation process, the positioning protrusions 4 at the two ends of the silicon carbide heat exchange plate are inserted into the holes of the positioning plate 8. The distance between adjacent silicon carbide plates 1 is the flue gas flow channel. A plurality of silicon carbide plate heat exchange plates form a heat exchange core body, pipe boxes 7 are welded outside pipe plates 6 on two sides and used for water inlet and outlet, the box plates 9 are welded on two sides parallel to the silicon carbide plate pieces 1, and a flue gas inlet pipeline 12 and a flue gas outlet pipeline 13 are welded on two sides perpendicular to the silicon carbide plate pieces 1. The pipe box 7 is welded with an external pipeline and is communicated with a water inlet and outlet pipeline.

During the use, the flue gas gets into the heat transfer box from flue gas inlet pipe 12, then the flue gas between the flue gas walking carborundum slab 1 leads to, and water or heat transfer air get into from the pipe case, then water or heat transfer air walk carborundum slab 1 inboard, through the high-efficient heat conductivity of carborundum slab 1, realize reducing the flue gas temperature, the temperature of water risees to realize the heat transfer. The flue gas after heat exchange is discharged from a chimney through a flue gas outlet pipeline 13, and the heated water can be used for next heat exchange.

Embodiment 3, different from embodiment 1, the both sides are taken over 2 and can be changed into the long plastic hose of PTFE or PA material, both sides tube sheet 6 and channel case 7 can be changed into the both sides business turn over water collector tube, have one row of water inlet or play water interface on the collector tube, long plastic hose one end and carborundum sheet bar 1 on the interface nipple joint 5, the other end connects on the collector tube, so realize, water enters from collector tube one end, enter carborundum sheet bar 1 through long plastic hose, flow out to the collector tube of the opposite side through the long plastic hose of the other end after exchanging heat with the flue gas, accomplish the heat transfer.

The utility model discloses use carborundum heat transfer board, have high corrosion-resistant, anti-oxidant, erosion resistance can, have splendid life. The problem of low-temperature dew point corrosion in the field of heat exchangers is effectively solved, and the heat conducting performance is better. The mounting structure is simple, the heat exchange space is larger, and the sealing effect is better.

The present embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Claims

1. A carborundum heat transfer board which characterized in that: the silicon carbide plate comprises a silicon carbide plate (1), wherein a cavity is arranged in the silicon carbide plate (1), water conveying holes (15) communicated with the cavity are formed in two ends of the silicon carbide plate (1), liquid collecting shells (3) are fixed at two ends of the silicon carbide plate (1), and connecting pipes (2) are connected to the outer sides of the liquid collecting shells (3) on two sides.

2. The silicon carbide heat exchange plate of claim 1, wherein: and positioning bulges (4) are fixed at two ends of the liquid collection shell (3).

3. A silicon carbide heat exchanger plate according to claim 2, wherein: both sides collection liquid shell (3) outside be fixed with interface nipple joint (5), collection liquid shell (3) and location arch (4) be integrated into one piece, be equipped with annular groove on interface nipple joint (5) outer wall, be equipped with sealing washer (10) in the annular groove, also be equipped with the annular groove who holds sealing washer (10) on the inner wall of takeover (2).

4. A silicon carbide heat exchanger plate according to claim 3, wherein: an annular groove is formed in the outer wall of the outer end of the connecting pipe (2), and a second sealing ring (11) is arranged in the annular groove.

5. A silicon carbide heat exchanger is characterized in that: comprising a plurality of silicon carbide heat exchange plates according to any one of claims 1 to 4 and a heat exchange box for accommodating and mounting the same, wherein the heat exchange box is provided with a flue gas inlet pipe (12) and a flue gas outlet pipe (13) at the front end and the rear end.

6. The silicon carbide heat exchanger of claim 5, wherein: the heat exchange box body comprises tube plates (6) arranged on the left side and the right side of the silicon carbide heat exchange plate and box plates (9) fixed on the upper side and the lower side of the tube plates (6), through holes for the connection tubes (2) to penetrate are formed in the tube plates (6), annular grooves for accommodating the sealing rings II (11) are formed in the through holes, tube boxes (7) are fixed on the outer sides of the tube plates (6), the outer ends of the connection tubes (2) extend into the tube boxes (7), a liquid inlet is formed in the tube boxes (7) on one side, and a liquid outlet is formed in the tube boxes (.

7. The silicon carbide heat exchanger of claim 5, wherein: positioning plates (8) fixed with the tube plates (6) are arranged on the front side and the rear side of the silicon carbide heat exchange plate, and positioning holes matched with the positioning protrusions (4) are formed in the positioning plates (8).

8. The silicon carbide heat exchanger of claim 6, wherein: the flue gas inlet pipeline (12) and the flue gas outlet pipeline (13) are both reducer pipes with the outer side calibers smaller than the inner side calibers, and the flue gas inlet pipeline (12) and the flue gas outlet pipeline (13) are fixed at two ends of the tube plate (6) and the box plate (9).

9. The silicon carbide heat exchanger of claim 8, wherein: the outer ends of the flue gas inlet pipeline (12) and the flue gas outlet pipeline (13) are both fixed with connecting flange pipes (14).

10. The silicon carbide heat exchanger of claim 8, wherein: the connecting pipes (2) at two sides can be changed into long plastic hoses made of PTFE or PA materials, the tube plates (6) at two sides and the tube box (7) at two sides can be changed into water inlet and outlet collecting pipes at two sides, a row of water inlet or outlet interfaces are arranged on the collecting pipes, one end of each long plastic hose is connected with the interface short joint (5) on the silicon carbide plate (1), and the other end of each long plastic hose is connected with the collecting pipes.