CN210463065U

CN210463065U - Flue heat exchanger and combustion boiler thereof

Info

Publication number: CN210463065U
Application number: CN201921051242.8U
Authority: CN
Inventors: 周润峰; 张俊杰
Original assignee: Zhejiang Siteli Heat Energy Equipment Manufacturing Co ltd
Current assignee: Zhejiang Siteli Heat Energy Equipment Manufacturing Co ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-05-05
Anticipated expiration: 2029-07-05

Abstract

The utility model discloses a flue heat exchanger and a combustion boiler thereof, which belong to the field of boiler equipment manufacture and have the advantage of improving the heat exchange effect of flue gas, its technical scheme as follows, including the heat transfer case, the inlet tube, the heat transfer case both ends are equipped with smoke inlet and exhaust port respectively, the inlet tube passes through the heat transfer case, the inlet tube includes the cold water section in proper order, the heat transfer section, the intercommunication section, heat transfer section spiral range upon range of is the tube-shape, the heat transfer section cross-section is waist shape, range upon range of adjacent heat transfer section side forms the heat transfer clearance, the heat transfer section is located the heat transfer incasement, the cold water section all sets up on the heat transfer case lateral wall with the intercommunication section, smoke inlet is located heat transfer section tubular structure opening one end, the exhaust port is located the heat transfer section tubular structure opening other end, the inside flue gas barrier plate that is equipped with of heat transfer section tubular structure, the flue gas barrier plate is close to smoke inlet and forms into.

Description

Flue heat exchanger and combustion boiler thereof

Technical Field

The utility model relates to a boiler equipment makes the field, in particular to flue heat exchanger and burning boiler thereof.

Background

The methanol boiler is a novel green fuel boiler, uses methanol as fuel, heats the inside of the boiler body through the action of the burner, heats water into hot water or steam, and is applied very widely in the current market.

Chinese patent publication No. CN206037770U discloses a spiral tube type flue heat exchanger, which comprises a shell and a spiral tube arranged in the shell, and the heat exchanger has a simple spiral structure to increase the contact area with flue gas to achieve a better heat exchange effect, but in the actual use process, the heat exchange effect is lower, and the heat loss is larger.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a flue heat exchanger and burning boiler thereof, it has the advantage that promotes flue gas heat transfer effect.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a flue heat exchanger, includes heat transfer case, inlet tube, the heat transfer case both ends are equipped with into smoke mouth and exhaust port respectively, the inlet tube passes through the heat transfer case, the inlet tube includes cold water section, heat transfer section, intercommunication section in proper order, heat transfer section spiral is range upon range of to be the tube-shape, heat transfer section cross-section is waist shape, and range upon range of adjacent heat transfer section side forms the heat transfer clearance, the heat transfer section is located the heat transfer incasement, cold water section all sets up on the heat transfer case lateral wall with the intercommunication section, it is located heat transfer section tubular structure opening one end to advance the smoke mouth, the exhaust port is located heat transfer section tubular structure opening other end, the inside flue gas barrier plate that is equipped with of heat transfer section tubular structure, the flue gas barrier plate is close to into the smoke mouth and forms into cigarette portion, the flue gas barrier plate.

By adopting the technical scheme, the smoke enters the heat exchange box through the smoke inlet, the entered smoke is positioned in the smoke inlet and contacts with the spirally-laminated cylindrical heat exchange section, so that primary heat exchange is carried out, the smoke continuously enters the heat exchange box, due to the blocking effect of the smoke blocking plate, the smoke flows to the position close to the inner wall surface of the heat exchange box from the heat exchange gap formed by laminating the smoke inlet, the heat exchange gap is smaller due to the laminating of the heat exchange sections, so that the contact area between the heat exchange section and the smoke is furthest increased, secondary heat exchange is carried out, the heat exchange effect is improved, the smoke continuously flows at the position close to the inner wall surface of the heat exchange box, the smoke and the heat exchange section close to the side wall of the heat exchange box carry out tertiary heat exchange with the smoke, the smoke flows to the smoke return part through the heat exchange gap formed by laminating the smoke return part, four times of heat exchange are carried out, the smoke, thereby furthest's promotion heat recovery effect promotes flue gas heat transfer effect, reduces the waste of the energy.

Further, the volume of the smoke inlet part is larger than that of the smoke return part.

Through adopting above-mentioned technical scheme, it is great to advance cigarette position flue gas heat, promotes the gas storage volume of advancing cigarette portion, and thereby the flue gas temperature is high bulky, and under the equal sectional area, the flue gas velocity of flow is just big, and the heat transfer effect is just better.

Furthermore, a support frame is arranged inside the heat exchange section cylindrical structure, and the smoke blocking plate is connected to the support frame through screws.

Through adopting above-mentioned technical scheme, the barrier plate passes through the bolted connection and is convenient for install.

Furthermore, a necking is arranged at the connecting position of the cold water section and the heat exchange section, and a flaring is arranged at the connecting position of the heat exchange section and the communicating section.

Through adopting above-mentioned technical scheme, through the setting of throat, promote the inside pressure of heat transfer section, increase the flow efficiency, promote the preheating efficiency to liquid.

Furthermore, one side of the heat exchange section, which is far away from the flue gas blocking plate, is planar.

Through adopting above-mentioned technical scheme, the flue gas that is convenient for to be close to heat exchange box internal face flows in plane shape setting.

Furthermore, a discharge pipe is arranged at the bottom of the heat exchange box, and a smoke sealing water collector is connected to the bottom of the discharge pipe.

By adopting the technical scheme, latent heat of vaporization released by condensing water vapor in the smoke of the cold water section is absorbed by water entering the cold water section, and the generated condensed water is discharged through the discharge pipe and the smoke sealing water collector; the sensible heat in the flue gas is not only absorbed to the cold water section, has also absorbed most latent heat simultaneously to promote the thermal efficiency of boiler, it is more energy-conserving, seal the effectual comdenstion water of collecting of cigarette water collector, simultaneously effectual closed flue gas direct flow to the atmosphere.

Further, seal cigarette water collector and include header tank, overflow pipe, the overflow pipe is connected at the header tank lateral wall, delivery pipe connection is in the header tank side, delivery pipe and header tank's joint height is less than overflow pipe and header tank's joint height, liquid has been irritated in the header tank.

Through adopting above-mentioned technical scheme, too much comdenstion water is discharged through the overflow pipe, avoids the liquid in the header tank too much.

The utility model provides a combustion boiler, includes furnace body and flue heat exchanger, the furnace body includes heating pipe, parcel pipe, discharges fume pipe, inlet tube, outlet pipe, the heating pipe is horizontal segment, vertical section in proper order, the section of discharging fume, the horizontal segment communicates with each other with vertical section bottom, the section of discharging fume communicates with each other with vertical section top, the section of discharging fume communicates with each other with the inlet flue, the pipe of discharging fume communicates with each other with the outlet flue, the heating pipe is located the parcel intraductal, intercommunication section and parcel socle intercommunication, the furnace body is kept away from the pipe of discharging fume and is connected with the combustor.

Through adopting above-mentioned technical scheme, the combustor sprays flame, makes the temperature in the furnace body promote, carries out effectual heating to the intraductal water of parcel, and the intraductal water of parcel passes through the flue heat exchanger and reenters in the parcel, and in the flue gas that produces in the furnace body got into the flue heat exchanger, the water that makes the entering preheated to the hot effect of effectual promotion.

Furthermore, a liquid discharge pipe is arranged at the bottom of the heating pipe, and a smoke sealing water collector is connected to the bottom of the liquid discharge pipe.

By adopting the technical scheme, the condensed water generated in the furnace body can be effectively collected through the smoke sealing water collector.

To sum up, the utility model discloses following beneficial effect has:

1. the heat exchange effect is effectively improved by spirally laminating the heat exchange sections into a cylindrical shape and arranging the flue gas blocking plate, so that the energy waste is reduced;

2. through the setting of flue heat exchanger, preheat the water that gets into the furnace body, reduce furnace body heating pressure, provide energy utilization.

Drawings

FIG. 1 is a schematic view of a combustion boiler;

FIG. 2 is an enlarged view of A in FIG. 1;

fig. 3 is an enlarged view of B in fig. 2.

In the figure, 1, a heat exchange box; 11. a cold water section; 111. necking; 12. a heat exchange section; 121. a heat exchange gap; 13. a communicating section; 131. flaring; 14. a smoke inlet; 15. a smoke outlet; 16. a flue gas blocking plate; 161. a support frame; 17. a smoke inlet part; 18. a smoke returning part; 19. a discharge pipe; 2. a furnace body; 21. wrapping the pipe; 22. a horizontal segment; 23. a vertical section; 24. a smoke exhaust section; 25. a liquid discharge pipe; 26. a smoke exhaust pipe; 27. a water outlet pipe; 3. a burner; 4. a smoke-sealing water collector; 41. a water collection tank; 42. and (4) an overflow pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A flue heat exchanger comprises a heat exchange box 1 and a water inlet pipe, wherein a smoke inlet 14 and a smoke outlet 15 are respectively arranged at two ends of the heat exchange box 1, the water inlet pipe passes through the heat exchange box 1, the flue heat exchanger is arranged at the tail part of a furnace body 2, a burner 3 is arranged at the head part of the furnace body 2 to form a complete combustion boiler, wherein the furnace body 2 comprises a heating pipe, a wrapping pipe 21, a smoke exhaust pipe 26 and a water outlet pipe 27, the smoke exhaust port 15 is connected with the tail part of the heating pipe, the heating pipe is sequentially a horizontal section 22, a vertical section 23 and a smoke discharging section 24, the horizontal section 22 is communicated with the bottom of the vertical section 23, the smoke discharging section 24 is communicated with the top of the vertical section 23, therefore, the smoke inlet 14 is communicated with the tail part of the smoke exhaust section 24, so that the smoke in the heating pipe can enter the flue heat exchanger for heat exchange, further improving the heat recovery rate, wherein the smoke exhaust pipe 26 is communicated with the smoke exhaust port 15, the heating pipe is positioned in the wrapping pipe 21, and the communicating section 13 is communicated with the bottom end of the wrapping pipe 21.

Use combustion boiler to carry out the during operation at needs, combustor 3 sprays flame, make the temperature in the furnace body 2 promote, carry out effectual heating to the water in the parcel pipe 21, the flue gas that produces in the furnace body 2 gets into in the flue heat exchanger, and the water in the parcel pipe 21 passes through in the flue heat exchanger reentrants parcel pipe 21, consequently the hydroenergy that gets into carries out direct flame heating in the rethread parcel pipe 21 after preheating through the heat transfer effect of flue heat exchanger preferentially, thereby the thermal effect of effectual promotion, the thermal efficiency is promoted.

Wherein the inlet tube in the flue heat exchanger includes cold water section 11 in proper order, heat transfer section 12, intercommunication section 13, cold water section 11 is equipped with throat 111 with heat transfer section 12 hookup location, heat transfer section 12 is equipped with flaring 131 with intercommunication section 13 hookup location, outside cold water gets into heat transfer section 12 through cold water section 11, consequently, cold water can pass through throat 111, the cross-section that leads to rivers reduces, thereby the pressure of rivers has been promoted, make heat transfer section 12 internal pressure promote, increase the liquid flow efficiency, avoid the temperature to preheat liquid still exists in heat transfer section 12 after reaching flue gas preheating temperature upper limit, and influence heat exchange efficiency, promote the maximize to guaranteeing heat recovery, and the water after preheating gets into intercommunication section 13 through flaring 131, make the velocity of water relax, reduce the rivers impact to the inside of parcel pipe 21, guarantee the inside rivers stability of furnace body 2.

Wherein the heat exchange sections 12 are spirally laminated to form a cylinder, a heat exchange gap 121 is formed on the side surface of each heat exchange section 12 adjacent to each other, the heat exchange sections 12 are positioned in the heat exchange box 1, the cold water section 11 and the communicating section 13 are both arranged on the side wall of the heat exchange box 1, the smoke inlet 14 is positioned at one end of the opening of the cylinder structure of each heat exchange section 12, the smoke outlet 15 is positioned at the other end of the opening of the cylinder structure of each heat exchange section 12, a smoke blocking plate 16 is arranged in the cylinder structure of each heat exchange section 12, the smoke blocking plate 16 is close to the smoke inlet 14 to form a smoke inlet portion 17, the smoke blocking plate 16 is close to the smoke outlet to form a smoke return portion 18, the volume of the smoke inlet portion 17 is larger than that of the smoke return portion 18, a large amount of smoke with temperature is generated when the burner 3 generates heat, the smoke enters the heat exchange box 1 through the smoke inlet 14 and reaches the position of the smoke inlet portion 17, the, the heat exchanger has larger heat energy, so the heat exchanger is contacted with the inner wall surface of the spirally laminated cylindrical heat exchange section 12, the heat exchange is realized, and the temperature of liquid in the heat exchange section 12 can be greatly improved.

And because the flue gas barrier 16 blocks the effect, the flue gas can not directly be along the axial direction that the spiral of the heat transfer section 12 spiral that the spiral stacks to be the tube-shape forms and remove, but flow to the position that is close to heat transfer case 1 internal wall face from the heat transfer clearance 121 that advances the range of cigarette portion 17 position and form, because heat transfer section 12 cross-section is waist shape, and heat transfer clearance 121 is smaller, therefore the flue gas is very big with the area of contact of heat transfer section 12 when flowing through heat transfer clearance 121, thereby effectual heat transfer effect that has promoted, secondary heat transfer has been carried out, promote heat transfer effect.

After the flue gas flows through heat transfer clearance 121, the flue gas gets into and is located and is close to 1 internal face position of heat transfer case and then the case exhaust port 15 orientation continues to flow, carries out the cubic heat transfer with the flue gas with heat transfer section 12 near heat transfer case 1 lateral wall, because heat transfer section 12 keeps away from flue gas barrier plate 16 one side and is the plane, has consequently promoted the flue gas and has been located the stability when flowing near 1 internal face position of heat transfer case, is convenient for carry out the heat transfer, and reduces the noise that the flue gas produced when flowing.

After the flue gas flows to being close to cigarette portion 18 position of returning, the heat transfer clearance 121 that the range upon range of formation of rethread cigarette portion 18 position of returning flows cigarette portion 18 of returning to carried out the quartic heat transfer, the flue gas gathering carries out the quintic heat transfer and discharges again when returning cigarette portion 18, thereby furthest's promotion heat recovery effect promotes the flue gas heat transfer effect, reduces the waste of the energy.

And the flue gas continuously enters the heat exchange box 1, so that the flue heat exchanger continuously preheats the entering liquid.

The inside support frame 161 that is equipped with of 12 tubular structure of heat transfer section, flue gas barrier plate 16 passes through the screwed connection on support frame 161, and the barrier plate passes through the screwed connection and is convenient for install, also is convenient for later stage change maintenance.

When heat exchange and in-furnace heating, can produce partial comdenstion water in furnace body 2 and the flue heat exchanger, its comdenstion water is untimely got rid of can seriously influence the normal work of furnace body 2 and flue heat exchanger, consequently heat transfer case 1 is all being connected with the heating pipe and is sealing the cigarette collector, seal the effectual comdenstion water of collecting of cigarette water collector 4, effectual sealed flue gas directly flows to the atmosphere simultaneously, wherein heat transfer case 1 bottom is equipped with delivery pipe 19, the heating pipe bottom is equipped with fluid-discharge tube 25, fluid-discharge tube 25 bottom and delivery pipe 19 bottom all are connected with a cigarette water collector 4.

The smoke-sealing water collector 4 comprises a water collecting tank 41 and an overflow pipe 42, wherein the overflow pipe 42 is connected to the side wall of the water collecting tank 41, the discharge pipe 19 and the liquid discharge pipe 25 are both connected to the side surface of the water collecting tank 41, the connection height between the discharge pipe 19 and the liquid discharge pipe 25 and the water collecting tank 41 is lower than that between the overflow pipe 42 and the water collecting tank 41, liquid is filled in the water collecting tank 41, excessive liquid can be discharged through the overflow pipe 42, excessive condensed water of the liquid in the water collecting tank 41 is avoided, and the connection position between the discharge pipe 19 and the liquid discharge pipe 25 is also ensured to be lower than, during operation, the condensed water passes through the drain pipe 25 and the drain pipe 19 respectively to the water collecting tank 41 due to gravity, the condensed water is directly merged into the liquid in the water collecting tank 41, the redundant liquid overflows through the overflow pipe 42, the smoke is sealed by the liquid level of the drain pipe 25 and the drain pipe 19, so that the smoke cannot enter the water collecting tank 41, and the effect of sealing the smoke by water collection is achieved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A flue heat exchanger is characterized in that: the heat exchange device comprises a heat exchange box (1) and a water inlet pipe, wherein a smoke inlet (14) and a smoke outlet (15) are respectively arranged at two ends of the heat exchange box (1), the water inlet pipe passes through the heat exchange box (1), the water inlet pipe sequentially comprises a cold water section (11), a heat exchange section (12) and a communication section (13), the heat exchange section (12) is spirally stacked to form a cylinder, the cross section of the heat exchange section (12) is waist-shaped, the side surfaces of the heat exchange section (12) are stacked and adjacent to each other to form a heat exchange gap (121), the heat exchange section (12) is positioned in the heat exchange box (1), the cold water section (11) and the communication section (13) are both arranged on the side wall of the heat exchange box (1), the smoke inlet (14) is positioned at one end of a tubular structure opening of the heat exchange section (12), the smoke outlet (15) is positioned at the other end of the tubular structure of the heat exchange section, the smoke blocking plate (16) is close to the smoke inlet (14) to form a smoke inlet part (17), and the smoke blocking plate (16) is close to the smoke outlet to form a smoke return part (18).

2. A flue heat exchanger as claimed in claim 1 wherein: the volume of the smoke inlet part (17) is larger than that of the smoke return part (18).

3. A flue heat exchanger as claimed in claim 2 wherein: a supporting frame (161) is arranged in the cylindrical structure of the heat exchange section (12), and the smoke blocking plate (16) is connected to the supporting frame (161) through screws.

4. A flue heat exchanger as claimed in claim 1 wherein: the connection position of the cold water section (11) and the heat exchange section (12) is provided with a necking (111), and the connection position of the heat exchange section (12) and the communication section (13) is provided with a flaring (131).

5. A flue heat exchanger as claimed in claim 4 wherein: one side of the heat exchange section (12) far away from the flue gas blocking plate (16) is planar.

6. A flue heat exchanger as claimed in claim 1 wherein: the bottom of the heat exchange box (1) is provided with a discharge pipe (19), and the bottom of the discharge pipe (19) is connected with a smoke sealing water collector (4).

7. A flue heat exchanger as claimed in claim 6 wherein: seal cigarette water collector (4) including header tank (41), overflow pipe (42) are connected at header tank (41) lateral wall, delivery pipe (19) are connected in header tank (41) side, the delivery pipe (19) is less than the joint height of overflow pipe (42) and header tank (41) with the joint height of header tank (41), water tank (41) are irritated liquid in.

8. A combustion boiler, characterized by: the flue heat exchanger comprises a furnace body (2) and the flue heat exchanger as claimed in any one of claims 1 to 7, wherein the furnace body (2) comprises a heating pipe, a wrapping pipe (21), a smoke exhaust pipe (26) and a water outlet pipe (27), the heating pipe is sequentially a horizontal section (22), a vertical section (23) and a smoke exhaust section (24), the horizontal section (22) is communicated with the bottom of the vertical section (23), the smoke exhaust section (24) is communicated with the top of the vertical section (23), the smoke exhaust section (24) is communicated with a smoke inlet (14), the smoke exhaust pipe (26) is communicated with a smoke exhaust port (15), the heating pipe is positioned in the wrapping pipe (21), the communicating section (13) is communicated with the bottom end of the wrapping pipe (21), and the furnace body (2) is connected with a combustor (3) far away from the smoke exhaust pipe (26).

9. A combustion boiler according to claim 8, characterized in that: a liquid discharge pipe (25) is arranged at the bottom of the heating pipe, and a smoke sealing water collector (4) is connected to the bottom of the liquid discharge pipe (25).