CN210399512U - Backwater split type water circulation boiler system - Google Patents
Backwater split type water circulation boiler system Download PDFInfo
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- CN210399512U CN210399512U CN201920083371.9U CN201920083371U CN210399512U CN 210399512 U CN210399512 U CN 210399512U CN 201920083371 U CN201920083371 U CN 201920083371U CN 210399512 U CN210399512 U CN 210399512U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The utility model relates to the technical field of boilers, and discloses a backwater split water circulation boiler system, which comprises a boiler shell with a furnace pipe, wherein the top of the furnace pipe is provided with a burner, one end of the furnace pipe is provided with a smoke chamber, and the outer wall of the furnace pipe, which is close to the burner, is connected with a separation plate; the inner cavity of the boiler shell is divided into an upper cavity and a lower cavity by the partition board, a first return pipe, a second return pipe and a water outlet pipe are sequentially arranged on the outer wall of the boiler shell from bottom to top, and a plurality of heat exchange pipes for communicating the smoke chamber with the upper cavity are arranged in the lower cavity along the periphery of the furnace pipe; and a flow guide pipe is inserted into the heat exchange pipe, the port of the flow guide pipe close to the smoke chamber is communicated with the first water return pipe, and the other end of the flow guide pipe is positioned in the lower chamber. The utility model discloses the honeycomb duct that utilizes and wet return intercommunication lets in the low temperature comdenstion water to the zone of heating of lower cavity beyond the stove courage, because of honeycomb duct partly insert locate the heat exchange tube in, solved the unable problem to the moisture condensation in the central flue gas of heat exchange tube among the prior art, improved the heat utilization rate of boiler.
Description
Technical Field
The utility model relates to a boiler technical field, concretely relates to return water split type water circulating boiler system.
Background
The water circulation boiler system is a preferred boiler for industrial production or heat supply due to small volume, compact structure, convenient operation, high thermal efficiency, cleanness and environmental protection. The boiler comprises a boiler shell, a burner, a heating cavity, a heat exchange tube and the like. In industry, natural gas is generally selected as fuel, after fuel gas is combusted in a boiler shell, combustion products are water, carbon dioxide and other substances, the water exists in the flue gas in the form of high-temperature steam, the temperature of the flue gas is about 200 ℃, and the thermal efficiency is over 90 percent. The specific principle is as follows: the natural gas is ignited by the burner in the furnace pipe to form high-temperature flue gas, the high-temperature flue gas exchanges heat with hot water on the outer wall of the furnace pipe and then enters the smoke chamber, and the flue gas is discharged through the exhaust pipe after being converted to 180 degrees in the smoke chamber and exchanges heat with the hot water through the heat exchange pipe. The cold water forms hot water or steam in the heating cavity and is conveyed to the heat supply end by the water outlet pipe, and condensed water is formed after heat exchange is carried out at the heat supply end and enters the heating cavity through the water return pipe.
The steam contains a large amount of heat in the furnace pipe and the heat exchange pipe, and if the steam is directly discharged, a large amount of waste can be caused, and the steam can release a large amount of heat in the condensation and liquefaction process, so that the problem that needs to be solved is to recycle the heat. The heat radiating fins are arranged in the existing heat exchange tubes, so that the heat transfer area between the flue gas and the heat exchange tubes can be increased, the heat release of water vapor condensation is facilitated, the temperature difference between the central temperature of the heat exchange tubes and the temperature of the flue gas is small, the condensation and liquefaction of the water vapor in the flue gas are not facilitated, and the heat utilization rate of a boiler is low.
SUMMERY OF THE UTILITY MODEL
Based on above problem, the utility model provides a return water split type water circulating boiler system has solved among the prior art unable problem to the moisture condensation in the central flue gas in the heat transfer pipe, has improved the heat utilization ratio of boiler.
For solving the technical problem, the utility model provides a following technical scheme:
a backwater split water circulation boiler system comprises a boiler shell, wherein a vertically arranged furnace is arranged in the boiler shell, a fire inlet is formed in the top of the furnace, a burner with a fire spraying direction facing the inner cavity of the furnace is arranged at the fire inlet of the furnace, a smoke chamber communicated with the inner cavity of the furnace is arranged at one end of the furnace far away from the burner, an isolation plate is connected to the outer wall of the furnace close to the burner, and the edge of the isolation plate is in sealing connection with the contact part of the inner wall of the boiler shell; the inner cavity of the boiler shell is divided into an upper cavity and a lower cavity by the partition board, a first water return pipe, a second water return pipe and a water outlet pipe which are communicated with the lower cavity are sequentially arranged on the outer wall of the boiler shell corresponding to the lower cavity from bottom to top, a plurality of heat exchange pipes are annularly arranged in the lower cavity along the periphery of the furnace pipe, one end of each heat exchange pipe is communicated with the smoke chamber, and the other end of each heat exchange pipe is communicated with the upper cavity; a flow guide pipe is inserted in the heat exchange pipe, one end of the flow guide pipe extends to a position close to the smoke chamber, and the other end of the flow guide pipe penetrates through the heat exchange pipe and is communicated with a lower chamber corresponding to the outer wall of the furnace pipe; the end openings of the diversion pipes close to the smoke chamber are communicated with the first water return pipe, and the outer wall of the boiler shell is provided with an exhaust pipe communicated with the upper chamber.
Furthermore, each flow guide pipe is communicated with the first water return pipe through an annular flow division pipe; the annular shunt tubes comprise annular main tubes communicated with the water return tubes, and shunt branch tubes communicated with each flow guide tube are arranged on the annular main tubes.
Further, a heat radiating fin parallel to the central axis of the heat exchange tube is arranged in a gap between the heat exchange tube and the flow guide tube.
Preferably, the flow guide pipe is a spiral pipe.
Furthermore, each flow guide pipe penetrates out of the end of the heat exchange pipe communicated with the upper cavity and penetrates through the partition plate to be communicated with the lower cavity.
Furthermore, the furnace wall of the furnace pipe is corrugated.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses the honeycomb duct that utilizes and a wet return intercommunication lets in low temperature comdenstion water to the zone of heating of lower cavity beyond the stove courage, because of honeycomb duct partly insert locate in the heat exchange tube, the flue gas of burning is discharged into the cavity by the clearance between heat exchange tube and the honeycomb duct, heat transfer to low temperature comdenstion water in the flue gas, moisture in the flue gas meets behind the low temperature comdenstion water with heat release and condensation one-tenth water droplet, the problem of the moisture condensation in the central flue gas of unable heat exchange tube among the prior art has been solved, the heat utilization rate of boiler has been improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of section A-A of FIG. 1;
fig. 3 is a schematic structural view of a heat dissipation fin, a heat exchange tube and a flow guide tube in embodiment 1;
FIG. 4 is a schematic structural view of a draft tube in example 2;
wherein: 1. a boiler housing; 2. a furnace pipe; 3. a burner; 4. a smoking chamber; 5. a separator plate; 6. an upper chamber; 7. a lower chamber; 8. a water return pipe I; 9. a water return pipe II; 10. a water outlet pipe; 11. a heat exchange pipe; 12. a flow guide pipe; 13. an exhaust pipe; 14. a ring main pipe; 15. a branch pipe; 16. and (4) radiating fins.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1:
referring to fig. 1-2, a backwater split water circulation boiler system comprises a boiler shell 1, a vertically arranged furnace pipe 2 is installed in the boiler shell 1, the top of the furnace pipe 2 is a fire inlet, a burner 3 with a fire spraying direction facing to the inner cavity of the furnace pipe 2 is arranged at the fire inlet of the furnace pipe 2, a smoke chamber 4 communicated with the inner cavity of the furnace pipe 2 is arranged at one end of the furnace pipe 2 far away from the burner 3, a partition plate 5 is connected to the outer wall of the furnace pipe 2 close to the burner 3, and the edge of the partition plate 5 is hermetically connected with the contact part of the inner wall of the boiler shell 1; the inner cavity of the boiler shell 1 is divided into an upper cavity 6 and a lower cavity 7 by the partition plate 5, a first water return pipe 8, a second water return pipe 9 and a water outlet pipe 10 which are communicated with the lower cavity 7 are sequentially arranged on the outer wall of the boiler shell 1 corresponding to the lower cavity 7 from bottom to top, a plurality of heat exchange pipes 11 are annularly arranged in the lower cavity 7 along the periphery of the furnace pipe 2, one end of each heat exchange pipe 11 is communicated with the smoke chamber 4, and the other end of each heat exchange pipe is communicated with the upper cavity 6; a flow guide pipe 12 is inserted in the heat exchange pipe 11, one end of the flow guide pipe 12 extends to a position close to the smoke chamber 4, and the other end of the flow guide pipe 12 penetrates through the heat exchange pipe 11 and is communicated with a lower chamber 7 corresponding to the outer wall of the furnace pipe 2; the ports of the draft tube 12 close to the smoke chamber 4 are communicated with the first water return pipe 8, and the outer wall of the boiler shell 1 is provided with an exhaust pipe 13 communicated with the upper chamber 6.
In the embodiment, when the burner 3 is used for combustion, flame directly heats the furnace pipe 2 in the inner cavity of the furnace pipe 2, smoke formed by fuel combustion contains water, carbon dioxide and other substances, wherein the water exists in the inner cavity of the furnace pipe 2 in the form of high-temperature water vapor; the flue gas enters the smoke chamber 4, then enters the upper chamber 6 through the gap between the heat exchange tube 11 and the draft tube 12, and is discharged through the exhaust pipe 13 communicated with the upper chamber 6. The part of the lower chamber 7 outside the outer wall of the furnace pipe 2 is a hot water heating area, and water in the heating area absorbs heat transferred by the outer wall of the furnace pipe 2 and the outer wall of the heat exchange pipe 11 to form hot water or high-temperature steam which is conveyed to a heat supply end needing to use the hot water by a water outlet pipe 10; water carries out the heat exchange at the heat supply end after, the backward flow water after the cooling divide into low temperature backward flow water and high temperature backward flow water at the distal end, high temperature backward flow water gets into the zone of heating of cavity 7 down by the two 9 wet return that lower cavity 7 middle part position corresponds, low temperature backward flow water lets in the honeycomb duct 12 by the wet return 8 that is located cavity 7 bottom correspondence down, and finally flow into the zone of heating of cavity 7 down by honeycomb duct 12, realize return water split water circulation heating, the low temperature backward flow water in the wet return 8 simultaneously cools off the heat transfer to the flue gas at heat exchange tube 11 center, and become liquid water with the high temperature vapor condensation in the flue gas, the heat utilization of boiler has been improved greatly.
Each draft tube 12 is communicated with the first water return tube 8 through an annular shunt tube; the annular shunt pipe comprises an annular main pipe 14 communicated with the water return pipe, and a shunt branch pipe 15 communicated with each guide pipe 12 is arranged on the annular main pipe 14. The low-temperature return water enters the annular main pipe 14 from the water return pipe I8 and then enters the draft tubes 12 through the branch flow pipes 15 communicated with the draft tubes 12, so that uniform water distribution of the low-temperature return water is realized.
Referring to fig. 1 to 3, a heat dissipation fin 16 parallel to the central axis of the heat exchange tube 11 is arranged in a gap between the heat exchange tube 11 and the draft tube 12, flue gas flows in the gap between the heat exchange tube 11 and the draft tube 12, the heat transfer area of the flue gas can be increased by adding the heat dissipation fin 16, the heat transfer efficiency is improved, and the temperature of the flue gas entering the upper chamber 6 is favorably reduced. Each flow guide pipe 12 penetrates out of the end of the heat exchange pipe 11 communicated with the upper chamber 6 and penetrates through the partition plate 5 to be communicated with the lower chamber 7, so that part of the flow guide pipe 12 is positioned in the upper chamber 6, the flue gas entering the upper chamber 6 can be subjected to further heat exchange, the temperature of the flue gas discharged by the exhaust pipe 13 is favorably reduced, and the utilization rate of heat is further improved.
Referring to fig. 1, the wall of the furnace pipe 2 is corrugated, which increases the contact area of the water bath furnace pipe 2 in the heating cavity, increases the heat exchange rate, and accelerates the generation rate of steam.
Example 2:
referring to fig. 1, 2 and 4, a water-return split water-circulation boiler system comprises a boiler shell 1, a vertically arranged furnace pipe 2 is installed in the boiler shell 1, the top of the furnace pipe 2 is a fire inlet, the fire inlet of the furnace pipe 2 is provided with a burner 3 with a fire spraying direction facing to the inner cavity of the furnace pipe 2, one end of the furnace pipe 2 far away from the burner 3 is provided with a smoke chamber 4 communicated with the inner cavity of the furnace pipe 2, the outer wall of the furnace pipe 2 close to the burner 3 is connected with a separation plate 5, and the edge of the separation plate 5 is hermetically connected with the contact part of the inner wall of the boiler shell 1; the inner cavity of the boiler shell 1 is divided into an upper cavity 6 and a lower cavity 7 by the partition plate 5, a first water return pipe 8, a second water return pipe 9 and a water outlet pipe 10 which are communicated with the lower cavity 7 are sequentially arranged on the outer wall of the boiler shell 1 corresponding to the lower cavity 7 from bottom to top, a plurality of heat exchange pipes 11 are annularly arranged in the lower cavity 7 along the periphery of the furnace pipe 2, one end of each heat exchange pipe 11 is communicated with the smoke chamber 4, and the other end of each heat exchange pipe is communicated with the upper cavity 6; a flow guide pipe 12 is inserted in the heat exchange pipe 11, one end of the flow guide pipe 12 extends to a position close to the smoke chamber 4, and the other end of the flow guide pipe 12 penetrates through the heat exchange pipe 11 and is communicated with a lower chamber 7 corresponding to the outer wall of the furnace pipe 2; the ports of the draft tube 12 close to the smoke chamber 4 are communicated with the first water return pipe 8, and the outer wall of the boiler shell 1 is provided with an exhaust pipe 13 communicated with the upper chamber 6.
The honeycomb duct 12 in this embodiment is a spiral tube, which can increase the contact area between the flue gas in the heat exchange tube 11 and the honeycomb duct 12, and the arrangement of the spiral tube also increases the residence time of the low-temperature return water in the honeycomb duct 12, thereby improving the heat exchange efficiency.
Other parts in this embodiment are the same as embodiment 1, and are not described herein again.
The embodiment of the present invention is the above. The specific parameters in the above embodiments and examples are only for the purpose of clearly showing the verification process of the present invention, and are not used to limit the protection scope of the present invention, which is still subject to the claims, and all the equivalent structural changes made by using the contents of the specification and drawings of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A backwater split type water circulation boiler system comprises a boiler shell (1), wherein a furnace pipe (2) is vertically arranged in the boiler shell (1), the top of the furnace pipe (2) is a fire inlet, a burner (3) with a fire spraying direction facing the inner cavity of the furnace pipe (2) is arranged at the fire inlet of the furnace pipe (2), a smoke chamber (4) communicated with the inner cavity of the furnace pipe (2) is arranged at one end, far away from the burner (3), of the furnace pipe (2), a partition plate (5) is connected to the outer wall, close to the burner (3), of the furnace pipe (2), and the edge of the partition plate (5) is in sealing connection with the contact part of the inner wall of the boiler shell (1); division board (5) are divided into upper plenum chamber (6) and lower plenum chamber (7) with boiler casing (1) inner chamber, its characterized in that: a water return pipe I (8), a water return pipe II (9) and a water outlet pipe (10) which are communicated with the lower cavity (7) are sequentially arranged on the outer wall of the boiler shell (1) corresponding to the lower cavity (7) from bottom to top, a plurality of heat exchange pipes (11) are annularly arranged in the lower cavity (7) along the periphery of the furnace container (2), one end of each heat exchange pipe (11) is communicated with the smoke chamber (4), and the other end of each heat exchange pipe is communicated with the upper cavity (6); a flow guide pipe (12) is inserted in the heat exchange pipe (11), one end of the flow guide pipe (12) extends to a position close to the smoke chamber (4), and the other end of the flow guide pipe penetrates through the heat exchange pipe (11) and is communicated with a lower chamber (7) corresponding to the outer wall of the furnace pipe (2); the ports of the guide pipe (12) close to the smoke chamber (4) are communicated with the first water return pipe (8), and the outer wall of the boiler shell (1) is provided with an exhaust pipe (13) communicated with the upper chamber (6).
2. The return water split water circulation boiler system according to claim 1, characterized in that: each draft tube (12) is communicated with the first water return tube (8) through an annular shunt tube; the annular shunt tubes comprise annular main tubes (14) communicated with the water return tubes, and shunt branch tubes (15) communicated with the flow guide tubes (12) are arranged on the annular main tubes (14).
3. The return water split water circulation boiler system according to claim 1, characterized in that: and a heat radiating fin (16) parallel to the central axis of the heat exchange tube (11) is arranged in a gap between the heat exchange tube (11) and the draft tube (12).
4. The return water split water circulation boiler system according to claim 1, characterized in that: the draft tube (12) is a spiral tube.
5. The return water split water circulation boiler system according to claim 3 or 4, characterized in that: each flow guide pipe (12) penetrates out of the end of a heat exchange pipe (11) communicated with the upper chamber (6) and penetrates through the partition plate (5) to be communicated with the lower chamber (7).
6. The return water split water circulation boiler system according to claim 1, characterized in that: the furnace wall of the furnace pipe (2) is corrugated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083371.9U CN210399512U (en) | 2019-01-18 | 2019-01-18 | Backwater split type water circulation boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083371.9U CN210399512U (en) | 2019-01-18 | 2019-01-18 | Backwater split type water circulation boiler system |
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| Publication Number | Publication Date |
|---|---|
| CN210399512U true CN210399512U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920083371.9U Expired - Fee Related CN210399512U (en) | 2019-01-18 | 2019-01-18 | Backwater split type water circulation boiler system |
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| CN (1) | CN210399512U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178922A (en) * | 2020-09-25 | 2021-01-05 | 祁新纪 | Condensing gas boiler |
| CN112880185A (en) * | 2021-03-31 | 2021-06-01 | 广东万和热能科技有限公司 | Full-premix heat exchanger, heat exchange structure and honeycomb duct |
-
2019
- 2019-01-18 CN CN201920083371.9U patent/CN210399512U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178922A (en) * | 2020-09-25 | 2021-01-05 | 祁新纪 | Condensing gas boiler |
| CN112880185A (en) * | 2021-03-31 | 2021-06-01 | 广东万和热能科技有限公司 | Full-premix heat exchanger, heat exchange structure and honeycomb duct |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200424 Termination date: 20220118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |