CN215523359U - Flue gas waste heat recovery device of steam boiler - Google Patents
Flue gas waste heat recovery device of steam boiler Download PDFInfo
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- CN215523359U CN215523359U CN202121228601.XU CN202121228601U CN215523359U CN 215523359 U CN215523359 U CN 215523359U CN 202121228601 U CN202121228601 U CN 202121228601U CN 215523359 U CN215523359 U CN 215523359U
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- flue gas
- waste heat
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- steam boiler
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a flue gas waste heat recovery device of a steam boiler, which comprises a waste heat circulating mechanism and a waste heat caching mechanism, wherein the waste heat circulating mechanism comprises rectangular flue gas and a circulating pipe, one end of the rectangular flue gas is connected with a flue gas pipe of the steam boiler, the other end of the rectangular flue gas is connected with the waste heat caching mechanism, one end of the circulating pipe is communicated with the rectangular flue gas, the other end of the circulating pipe is communicated with a combustion chamber of the steam boiler, a fuel slag filtering mechanism is arranged in the rectangular flue gas, the fuel slag filtering mechanism is positioned between the circulating pipe and the waste heat caching mechanism, the waste heat caching mechanism comprises a heat storage pipe and a coil pipe, two ends of the heat storage pipe are respectively communicated with the coil pipe and the rectangular flue gas, and the diameter of the heat storage pipe is larger than the length of a port of the rectangular flue gas. The full combustion of the fuel is realized, the waste heat of the high-temperature flue gas is fully utilized, and the loss of energy is reduced.
Description
Technical Field
The utility model relates to the technical field of boiler flue gas waste heat utilization, in particular to a flue gas waste heat recovery device of a steam boiler.
Background
The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy. The boiler is a water container heated on fire, a furnace is a place where fuel is combusted, and the boiler comprises a boiler and a furnace. The hot water or steam generated in the boiler can directly provide heat energy for industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into electric energy through a generator. The existing combustion boiler directly enters a chimney through an cupola pipe to be discharged, the smoke flow is short, the combustion is insufficient, a large part of heat is discharged along with the smoke, the heat efficiency is low, the temperature of the discharged smoke is high, and the energy waste is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a flue gas waste heat recovery device of a steam boiler, which realizes the full combustion of fuel, fully utilizes the waste heat of high-temperature flue gas and reduces the loss of energy.
The purpose of the utility model is realized by the following technical scheme: a flue gas waste heat recovery device of a steam boiler comprises a waste heat circulating mechanism and a waste heat caching mechanism, wherein the waste heat circulating mechanism comprises a rectangular flue gas and a circulating pipe, one end of the rectangular flue gas is connected with a flue gas pipe of the steam boiler, the other end of the rectangular flue gas is connected with the waste heat caching mechanism, one end of the circulating pipe is communicated with the rectangular flue gas, the other end of the circulating pipe is communicated with a combustion chamber of the steam boiler, a fuel slag filtering mechanism is arranged in the rectangular flue gas, and the fuel slag filtering mechanism is located between the circulating pipe and the waste heat caching mechanism;
the waste heat caching mechanism comprises a heat storage pipe and a coiled pipe, the two ends of the heat storage pipe are communicated with the coiled pipe and the rectangular flue gas body respectively, and the diameter of the heat storage pipe is larger than the length of a port of the rectangular flue gas body.
Further, the fuel slag filtering mechanism comprises a rectangular plate and a filter screen, the rectangular plate is of a frame structure with a rectangular through groove formed in the middle, a rectangular frame is fixed on the inner wall of the rectangular through groove, and the filter screen is mounted on the rectangular frame through screws.
Further, the mounting plates are symmetrically fixed in the rectangular flue gas body up and down, and the rectangular plates are mounted on the mounting plates through screws.
Furthermore, a plurality of spoilers are arranged on the inner wall of the heat storage tube and are arranged in a vertically staggered mode.
Furthermore, a flange plate is fixed at one end, far away from the heat storage pipe, of the rectangular smoke gas.
Furthermore, one end, far away from the heat storage pipe, of the coiled pipe is connected with a spray tower, and a smoke exhaust pipe is arranged at the top of the spray tower.
Furthermore, a main water pipe is arranged in the spray tower, and the bottom of the main water pipe is communicated with a plurality of spray heads.
Furthermore, the inner wall of the spray tower is fixed with an annular boss, the annular boss is located above the main water pipe, and an active carbon disinfection layer is arranged on the annular boss.
The utility model has the beneficial effects that:
1. the utility model provides a fuel sediment filters through the filter screen in the flue gas waste heat recovery device of steam boiler, makes it fall into the circulating pipe and brings into the combustion chamber of steam boiler through the flow of high temperature flue gas, burns again the burning sediment that does not fully burn, makes the burning more abundant.
2. The flow velocity of the high-temperature flue gas is reduced through the heat storage pipe with the large diameter, the flowing time of the high-temperature flue gas in the heat storage pipe is prolonged, after the high-temperature flue gas flows into the coiled pipe, the flowing path of the high-temperature flue gas is improved through the coiled pipe, the time of the high-temperature flue gas in the coiled pipe is prolonged, heat exchange is carried out with the waste heat boiler through the waste heat caching mechanism, the heat exchange time of the high-temperature flue gas is prolonged, and the waste heat of the high-temperature flue gas is fully utilized.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a flue gas waste heat recovery device of a steam boiler according to the present invention;
FIG. 2 is a schematic view of the internal structure of a rectangular flue gas and heat storage pipe according to the present invention;
FIG. 3 is a perspective view of a fuel slag filter mechanism according to the present invention;
FIG. 4 is a perspective view of a rectangular plate according to the present invention;
FIG. 5 is a schematic view of the internal structure of the spray tower of the present invention;
in the figure, 1-rectangular smoke gas, 2-circulating pipe, 3-heat storage pipe, 4-coiled pipe, 5-rectangular plate, 6-filter screen, 7-rectangular through groove, 8-rectangular frame, 9-mounting plate, 10-spoiler, 11-flange plate, 12-spray tower, 13-smoke exhaust pipe, 14-main water pipe, 15-spray head, 16-annular boss and 17-active carbon disinfection layer.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1 to 5, a flue gas waste heat recovery device of a steam boiler comprises a waste heat circulation mechanism and a waste heat buffer mechanism, wherein the waste heat circulation mechanism comprises a rectangular flue gas 1 and a circulation pipe 2, one end of the rectangular flue gas 1 is connected with a flue gas pipe of the steam boiler, the other end of the rectangular flue gas is connected with the waste heat buffer mechanism, one end of the circulation pipe 2 is communicated with the rectangular flue gas 1, the other end of the circulation pipe 2 is communicated with a combustion chamber of the steam boiler, a fuel slag filtering mechanism is arranged in the rectangular flue gas 1 and located between the circulation pipe 2 and the waste heat buffer mechanism, fuel slag in high-temperature flue gas is filtered through the fuel slag filtering mechanism and falls into the circulation pipe 2, the fuel slag is brought into the combustion chamber of the steam boiler through the flow of the high-temperature flue gas, and the insufficiently combusted combustion slag is combusted again, so that the combustion is more sufficient; the waste heat caching mechanism comprises a heat storage pipe 3 and a coiled pipe 4, two ends of the heat storage pipe 3 are respectively communicated with the coiled pipe 4 and the rectangular flue gas 1, the diameter of the heat storage pipe 3 is larger than the length of a port of the rectangular flue gas 1, the diameter of the heat storage pipe 2 is larger than the length and the width of the end part of the rectangular flue gas 1, the end part of the rectangular flue gas 1 is communicated with the middle part of one end of the heat storage pipe 3, the flow velocity of the high-temperature flue gas is reduced through the heat storage pipe 3 with large diameter, the flowing time of the high-temperature flue gas in the heat storage pipe 3 is prolonged, after the high-temperature flue gas flows into the coiled pipe 4, the serpentine pipe 4 is used for improving the flowing path of the high-temperature flue gas and prolonging the time of the high-temperature flue gas in the serpentine pipe 4, when in specific implementation, the waste heat caching mechanism is arranged in the inner cavity of the waste heat boiler, the waste heat caching mechanism exchanges heat with water in the inner cavity of the waste heat boiler, so that the heat exchange time of high-temperature flue gas is prolonged, and the waste heat of the high-temperature flue gas is fully utilized.
Further, as shown in fig. 3 and fig. 4, during litigation, the fuel slag filtering mechanism includes a rectangular plate 5 and a filter screen 6, the rectangular plate 5 is a frame structure with a rectangular through groove 7 formed in the middle, a rectangular frame 8 is fixed on the inner wall of the rectangular through groove 7, the filter screen 6 is mounted on the rectangular frame 8 through screws, mounting plates 9 are symmetrically fixed in the rectangular flue gas 1 up and down, and the rectangular plate 5 is mounted on the mounting plates 9 through screws. The two ends of the rectangular plate 5 are respectively installed on the two installation plates 9 through screws, so that the rectangular plate 5 can be detachably connected, the rectangular plate 5 can be conveniently detached, the filter screen 6 on the rectangular plate can be cleaned or maintained, the filter screen 6 is prevented from being blocked due to fuel slag, meanwhile, the filter screen 6 is installed on the rectangular frame 8 through screws, the detachable connection of the filter screen 6 is realized, and the filter screen 6 can be conveniently replaced; in specific implementation, the rectangular plate 5 and the rectangular frame 8 are made of high-temperature-resistant steel, and the filter screen 6 is made of high-temperature-resistant material, such as tungsten wire.
Further, as shown in fig. 2, a plurality of spoilers 10 are disposed on the inner wall of the heat storage pipe 3, and the spoilers 10 are staggered up and down. The flow velocity of the high-temperature flue gas is further delayed through the spoiler 10, the heat exchange time of the high-temperature flue gas is prolonged, and the utilization effect of the waste heat of the high-temperature flue gas is improved.
Furthermore, a flange 11 is fixed at one end of the rectangular flue gas 1 far away from the heat storage pipe 3. Rectangle flue gas 1 is the cuboid structure, and the installation of the rectangular plate 5 of being convenient for adopts ring flange 11 to be connected with the flue gas pipe on the steam boiler, is convenient for separate rectangle flue gas 1 and flue gas pipe to be convenient for pull down rectangular plate 5, shortened rectangle flue gas 1 simultaneously and be equipped with the distance of ring flange 11 one end and mounting panel 9, make it the use tools stretch into in the rectangle flue gas 1 can realize the dismantlement of rectangular plate 5.
Further, as shown in fig. 5, one end of the serpentine pipe 4, which is far away from the heat storage pipe 3, is connected with a spray tower 12, a smoke exhaust pipe 13 is arranged at the top of the spray tower 12, a main water pipe 14 is arranged in the spray tower 12, the bottom of the main water pipe 14 is communicated with a plurality of spray heads 15, an annular boss 16 is fixed on the inner wall of the spray tower 12, the annular boss 16 is located above the main water pipe 14, and an activated carbon disinfection layer 17 is arranged on the annular boss 16. Carry out the dust fall through shower nozzle 15 to the high temperature flue gas and handle, detach the small dust that filter screen 6 can not filter, then the rethread active carbon layer 17 purifies the flue gas, discharges from discharging fume pipe 13 at last, has realized the purification of flue gas and has discharged, has avoided causing the pollution to the atmosphere, and active carbon layer 17 is placed on annular boss 16 to be convenient for regularly change active carbon layer 17.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the utility model is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (8)
1. The flue gas waste heat recovery device of the steam boiler is characterized by comprising a waste heat circulating mechanism and a waste heat caching mechanism, wherein the waste heat circulating mechanism comprises rectangular flue gas (1) and a circulating pipe (2), one end of the rectangular flue gas (1) is connected with a flue gas pipe of the steam boiler, the other end of the rectangular flue gas is connected with the waste heat caching mechanism, one end of the circulating pipe (2) is communicated with the rectangular flue gas (1), the other end of the circulating pipe is communicated with a combustion chamber of the steam boiler, a fuel slag filtering mechanism is arranged in the rectangular flue gas (1), and the fuel slag filtering mechanism is positioned between the circulating pipe (2) and the waste heat caching mechanism;
the waste heat caching mechanism comprises a heat storage pipe (3) and a coiled pipe (4), the two ends of the heat storage pipe (3) are communicated with the coiled pipe (4) and rectangular flue gas (1) respectively, and the diameter of the heat storage pipe (3) is larger than the port length of the rectangular flue gas (1).
2. A flue gas waste heat recovery device for a steam boiler according to claim 1, wherein the fuel slag filtering mechanism comprises a rectangular plate (5) and a filtering screen (6), the rectangular plate (5) is a frame structure with a rectangular through groove (7) at the middle part, a rectangular frame (8) is fixed on the inner wall of the rectangular through groove (7), and the filtering screen (6) is installed on the rectangular frame (8) through screws.
3. A flue gas waste heat recovery device of a steam boiler according to claim 2, characterized in that mounting plates (9) are fixed in the rectangular flue gas (1) in an up-down symmetrical manner, and the rectangular plates (5) are mounted on the mounting plates (9) through screws.
4. A flue gas waste heat recovery device for a steam boiler according to claim 1, wherein a plurality of spoilers (10) are arranged on the inner wall of the heat storage tube (3), and the spoilers (10) are arranged in a staggered manner.
5. A flue gas waste heat recovery device for a steam boiler according to claim 1, characterized in that a flange (11) is fixed to one end of the rectangular flue gas (1) far away from the heat storage pipe (3).
6. A flue gas waste heat recovery device for a steam boiler according to claim 1, wherein a spray tower (12) is connected to one end of the serpentine pipe (4) far away from the heat storage pipe (3), and a smoke exhaust pipe (13) is arranged at the top of the spray tower (12).
7. A flue gas waste heat recovery device for a steam boiler according to claim 6, characterized in that a main water pipe (14) is arranged in the spray tower (12), and a plurality of spray nozzles (15) are communicated with the bottom of the main water pipe (14).
8. A flue gas waste heat recovery device of a steam boiler according to claim 7, characterized in that the inner wall of the spray tower (12) is fixed with an annular boss (16), the annular boss (16) is positioned above the main water pipe (14), and the annular boss (16) is provided with an activated carbon disinfection layer (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121228601.XU CN215523359U (en) | 2021-05-28 | 2021-05-28 | Flue gas waste heat recovery device of steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121228601.XU CN215523359U (en) | 2021-05-28 | 2021-05-28 | Flue gas waste heat recovery device of steam boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215523359U true CN215523359U (en) | 2022-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121228601.XU Active CN215523359U (en) | 2021-05-28 | 2021-05-28 | Flue gas waste heat recovery device of steam boiler |
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| CN (1) | CN215523359U (en) |
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2021
- 2021-05-28 CN CN202121228601.XU patent/CN215523359U/en active Active
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