CN218544380U - Energy-efficient exhaust-heat steam boiler - Google Patents

Abstract

The utility model discloses an energy-efficient waste heat steam boiler relates to waste heat steam boiler technical field, including economizer and water heater collection case and drum and one-level evaporimeter and second grade evaporimeter, low temperature overheat collection case and the overheated collection case of high temperature and gas collecting tank and chimney, the equal fixedly connected with lid in top and the bottom of economizer, the inside fixed mounting of economizer has a plurality of soda pipelines, the beneficial effects of the utility model are that: through adopting being connected of circulating pipe and back flow, with the inside water that flows of one-level evaporimeter and second grade evaporimeter, at the in-process that gets into the drum through the back flow, partial water can get into in the circulating pipe, then gets into the soda pipeline once more through first shunt tubes, continues to absorb the heat of flue gas, has reduced the exhaust gas temperature relatively, reduces the loss of discharging fume, and fuel is saved can also make the water in the soda pipeline be in the mobile state, avoids its vaporization, and has increased the utilization ratio to the high temperature flue gas.

Description

Energy-efficient exhaust-heat steam boiler

Technical Field

The utility model relates to a waste heat boiler technical field specifically is a high-efficient energy-conserving waste heat boiler.

Background

The temperature of the gas exhausted from the gas turbine is as high as 600 ℃, and the gas still has high energy, and the high-temperature gas is sent to a boiler, water is heated into steam to push a steam turbine, and a generator is driven to generate electricity, so that the power generation capacity and the heat efficiency of the combined cycle unit are relatively increased by about 50%. This boiler that generates steam by using waste heat of exhaust gas from the gas turbine is called a waste heat boiler. The waste heat boiler is a boiler which heats water to a certain temperature by utilizing waste heat in waste gas, waste materials or waste liquid in various industrial processes and heat generated after combustible substances are combusted. The oil-fired boiler, the gas-fired boiler and the coal-fired boiler with the smoke box and the smoke flue waste heat recycling function are also called waste heat boilers.

The existing waste heat steam boiler reduces the temperature of the flue gas from high temperature to the temperature of the discharged flue gas to release heat for converting water into steam, and because the existing waste heat steam boiler absorbs the heat of the high-temperature flue gas once, the utilization rate is low, the heat energy of the flue gas is not fully absorbed, the temperature of the flue gas discharged into the atmosphere through a chimney is high, and the loss of the discharged flue gas is increased, therefore, the high-efficiency energy-saving waste heat steam boiler is provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to prior art not enough, the utility model provides a high-efficient energy-conserving exhaust-heat steam boiler has solved and has proposed in the above-mentioned background art because current exhaust-heat steam boiler is the heat of disposable absorption high temperature flue gas, and the utilization ratio is lower, does not let the heat energy of flue gas fully absorbed, leads to at last to emit into atmospheric flue gas temperature through the chimney still higher, has increased the problem of the loss of discharging fume.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a high-efficient energy-conserving exhaust-heat steam boiler, includes economizer and water heater collection box and drum and one-level evaporator and second grade evaporator, low temperature overheat collection box and high temperature overheat collection box and gas collecting tank and chimney, the equal fixedly connected with lid in top and the bottom of economizer, the inside fixed mounting of economizer has a plurality of soda pipelines, the inside of economizer just is located the outer wall fixedly connected with four baffles of a plurality of soda pipelines, and a plurality of the water inlet department of soda pipeline pegs graft and has first shunt tubes, the delivery port department of water heater collection box pegs graft and has the second elbow, the water inlet department of water heater collection box pegs graft and has the inlet tube, the other end of second elbow pegs graft in the inside of first shunt tubes, a plurality of the delivery socket department of soda pipeline has the second shunt tubes, the one end of second shunt tubes pegs graft and has the water pipe, the other end of water diversion pipe pegs graft in the inside of drum, the one end of first shunt tubes pegs graft and has the back flow pipe in the inside of back flow pipe, one of them the top peg graft of first branch tube has the first-class evaporator and the second grade evaporator tube communicates with the inside pipe of flue gas evaporator tube.

Preferably, a plurality of evaporator tubes are fixedly mounted inside the first-stage evaporator and the second-stage evaporator, a downcomer and an ascending tube are inserted into the boiler barrel, the downcomer, the ascending tube and a return tube penetrate through one end of the second-stage evaporator and are located inside the first-stage evaporator, a first elbow is inserted into the outer wall of the ascending tube, the other end of the first elbow is inserted into the bottom of the return tube, water in the boiler barrel enters the first-stage evaporator and the second-stage evaporator along the downcomer, part of the water is changed into steam and then enters the boiler barrel from the ascending tube, and the rest of the water enters the boiler barrel from the return tube.

Preferably, one end of each of the evaporator tubes is inserted into the interior of the downcomer, the other end of each of the evaporator tubes is inserted into the interior of the riser, one side of the primary evaporator is inserted with the flue gas inlet tube, the flue gas enters the primary evaporator, enters the secondary evaporator through the second flue gas inlet tube, and enters the economizer through the first flue gas inlet tube.

Preferably, a first steam pipe is inserted into the top of the boiler barrel, the other end of the first steam pipe is inserted into the low-temperature overheating header, a second steam pipe is inserted into the outer wall of the first steam pipe, the other end of the second steam pipe is inserted into the high-temperature overheating header, a steam connecting pipe is inserted into one side of the low-temperature overheating header, the low-temperature overheating header and the high-temperature overheating header are connected through the steam connecting pipe, and saturated steam enters the low-temperature overheating header and the high-temperature overheating header and is changed into overheated steam.

Preferably, a connecting pipeline is inserted between the high-temperature overheating collecting tank and the gas collecting tank, a steam discharge pipe is inserted at the exhaust end of the gas collecting tank, and the overheated steam is discharged through the steam discharge pipe so as to be supplied to the turbine for power generation.

Preferably, the bottom of one of the cover is inserted with a smoke exhaust pipe, the other end of the smoke exhaust pipe is connected with the air inlet end of the chimney, and the absorbed smoke enters the chimney through the smoke exhaust pipe and is exhausted into the atmosphere from the chimney.

Preferably, valves are arranged inside the circulating pipe and the return pipe and inside the first steam pipe and the second steam pipe, the circulating pipe and the return pipe enter the low-temperature overheating header or the high-temperature overheating header through the control of the valves according to the water content of saturated steam, the circulating pipe and the return pipe increase the heat return process, the average heat absorption degree is improved, and the circulating efficiency is increased.

The utility model provides a high-efficient energy-conserving exhaust-heat steam boiler possesses following beneficial effect:

1. this energy-efficient exhaust-heat steam boiler through adopting being connected of circulating pipe and back flow, with the inside flowing water of one-level evaporimeter and second grade evaporimeter, at the in-process that gets into the drum through the back flow, partial water can enter into the circulating pipe, then through first shunt tubes reentrant steam-water pipeline in, continue to absorb the heat of flue gas, reduced exhaust gas temperature relatively, reduce the loss of discharging fume, save fuel, can also make the water in the steam-water pipeline be in the mobile state, avoid its vaporization, and increased the utilization ratio to the high temperature flue gas.

2. This energy-efficient exhaust-heat steam boiler through adopting the second flue gas to manage, leads high temperature flue gas to the second grade evaporimeter from the one-level evaporimeter, carries out the secondary absorption to high temperature flue gas, and the steam that the inside evaporimeter pipe of one-level evaporimeter and second grade evaporimeter produced all gets into the drum through the tedge, has increased the absorption to high temperature flue gas heat, improves the average heat degree of absorbing heat.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic structural view of the economizer of the present invention;

FIG. 4 is a schematic view of the internal structure of the economizer of the present invention;

fig. 5 is a sectional view of the economizer of the present invention;

FIG. 6 is a schematic view of the internal structure of the first-stage evaporator and the second-stage evaporator of the present invention;

fig. 7 is a front view of the first-stage evaporator and the second-stage evaporator of the present invention;

fig. 8 is a top cross-sectional view of the economizer of the present invention.

In the figure: 1. a coal economizer; 2. a water heater header; 3. a smoke exhaust pipe; 4. a chimney; 5. a first shunt pipe; 6. a second shunt pipe; 7. a cover; 8. a water conduit; 9. a drum; 10. a circulation pipe; 11. a first-stage evaporator; 12. a secondary evaporator; 13. a return pipe; 14. a riser pipe; 15. a first steam pipe; 16. a low temperature superheat header; 17. a high temperature superheat header; 18. a second steam pipe; 19. a gas collection tank; 20. a first flue gas duct; 21. a steam discharge pipe; 22. a flue gas inlet pipe; 23. a down pipe; 24. an evaporator tube; 25. a first elbow; 26. a second flue gas pipe; 27. a second elbow; 28. a water inlet pipe; 29. a partition plate; 30. a steam-water pipeline; 31. a steam connecting pipe; 32. and connecting the pipelines.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1 to 8, the present invention provides a technical solution: an efficient energy-saving waste heat steam boiler comprises an economizer 1, a water heater header 2, a boiler barrel 9, a first-stage evaporator 11 and a second-stage evaporator 12, a low-temperature overheating header 16, a high-temperature overheating header 17, a gas collecting tank 19 and a chimney 4, wherein the top and the bottom of the economizer 1 are fixedly connected with a cover 7, a plurality of steam-water pipelines 30 are fixedly installed inside the economizer 1, four partition plates 29 are fixedly connected inside the economizer 1 and positioned on the outer walls of the plurality of steam-water pipelines 30, a first shunt pipe 5 is inserted at the water inlet of the plurality of steam-water pipelines 30, a second elbow 27 is inserted at the water outlet of the water heater header 2, a water inlet pipe 28 is inserted at the water inlet of the water heater header 2, the other end of the second elbow 27 is inserted inside the first shunt pipe 5, a second shunt pipe 6 is inserted at the water outlet of the plurality of steam-water pipelines 30, a water guide pipe 8 is inserted at one end of the second shunt pipe 6, the other end of the water guide pipe 8 is inserted inside the boiler barrel 9, a return pipe 10 is inserted at one end of the return pipe 5, the other end of the boiler barrel 9 is inserted and inserted between the first-stage evaporator cover and the first-stage evaporator pipe 20, and the second-stage evaporator 20, the second-stage evaporator 20 is connected with the second-stage evaporator pipe 26, the second evaporator pipe 20.

A plurality of evaporator tubes 24 are fixedly installed inside the primary evaporator 11 and the secondary evaporator 12, a downcomer 23 and an ascending tube 14 are inserted inside the drum 9, the downcomer 23, the ascending tube 14 and the return tube 13 penetrate through one end of the secondary evaporator 12 and are located inside the primary evaporator 11, a first elbow 25 is inserted in the outer wall of the ascending tube 14, the other end of the first elbow 25 is inserted in the bottom of the return tube 13, one ends of the evaporator tubes 24 are inserted in the downcomer 23, the other ends of the evaporator tubes 24 are inserted in the ascending tube 14, a flue gas inlet tube 22 is inserted in one side of the primary evaporator 11, water in the drum 9 enters the primary evaporator 11 and the secondary evaporator 12 along the downcomer 23 to absorb heat of flue gas, part of the water can generate steam, the steam can enter the drum 9 from the ascending tube 14, the rest of the water enters the drum 9 from the return tube 13, the drum 9 separates the steam and the water through a steam-water separation device, the water continuously absorbs heat through the downcomer 23, and during the period, high-temperature flue gas enters the primary evaporator 11, enters the secondary evaporator 11 through the first evaporator tube 26, and then enters the flue gas through the first evaporator tube 1.

The top of the boiler barrel 9 is inserted with a first steam pipe 15, the other end of the first steam pipe 15 is inserted in the low-temperature overheating collection box 16, the outer wall of the first steam pipe 15 is inserted with a second steam pipe 18, the other end of the second steam pipe 18 is inserted in the high-temperature overheating collection box 17, one side of the low-temperature overheating collection box 16 is inserted with a steam connecting pipe 31, the low-temperature overheating collection box 16 is connected with the high-temperature overheating collection box 17 through the steam connecting pipe 31, the circulating pipe 10, the return pipe 13, the first steam pipe 15 and the second steam pipe 18 are internally provided with valves, when the water content of saturated steam discharged from the boiler barrel 9 through the first steam pipe 15 is high, the saturated steam can firstly enter the low-temperature overheating collection box 16 and then enter the high-temperature overheating collection box 17 through the steam connecting pipe 31, and when the water content is low, the saturated steam can directly enter the high-temperature overheating collection box 17 and is changed into overheated steam after being treated.

A connecting pipeline 32 is inserted between the high-temperature overheating collecting box 17 and the gas collecting box 19, a steam discharge pipe 21 is inserted at the exhaust end of the gas collecting box 19, the overheated steam enters the gas collecting box 19 through the connecting pipeline 32, and then the overheated steam is discharged through the steam discharge pipe 21 so as to be supplied to a turbine for power generation and recycling.

The bottom of one of the cover 7 is inserted with the smoke exhaust pipe 3, the other end of the smoke exhaust pipe 3 is connected with the air inlet end of the chimney 4, high-temperature smoke enters the primary evaporator 11 from the smoke inlet pipe 22, enters the secondary evaporator 12 through the second smoke pipe 26, then enters the economizer 1 through the first smoke pipe 20, and during the process, the high-temperature smoke is firstly absorbed by water in the evaporator pipe 24, then is absorbed by water in the steam-water pipeline 30, and finally enters the chimney 4 through the smoke exhaust pipe 3 and is exhausted into the atmosphere.

In summary, in the high-efficiency energy-saving waste heat steam boiler, when in use, high-temperature flue gas enters the inside of the first-stage evaporator 11 through the flue gas inlet pipe 22, is firstly absorbed by the evaporator pipe 24 inside the first-stage evaporator 11, then enters the inside of the second-stage evaporator 12 through the second flue gas pipe 26, is absorbed by the evaporator pipe 24 inside the second-stage evaporator 12, then enters the inside of the economizer 1 through the flue gas pipe 20, is absorbed by water inside the steam-water pipe 30, and finally is exhausted to the atmosphere through the smoke exhaust pipe 3 and the chimney 4, during the period, softened water enters the first branch pipe 5 through the second elbow 27 inside the water heater header 2, then flows into the steam-water pipe 30 to absorb the heat of the high-temperature flue gas inside the economizer 1, then enters the water space of the boiler barrel 9 through the second branch pipe 6 and the water conduit 8, and passes through the downcomer 23, water is conveyed into an evaporator tube 24 to absorb heat of high-temperature flue gas in a primary evaporator 11 and a secondary evaporator 12, a part of water is changed into steam, the steam enters a boiler barrel 9 through an ascending tube 14 and is separated by a steam-water separation device in the boiler barrel 9, the water can return to the boiler barrel 9 through a return tube 13 and then enters the primary evaporator 11 and the secondary evaporator 12 through the return tube 13 to continuously absorb heat energy of the high-temperature flue gas, during the period, a part of water can enter a first shunt tube 5 through a circulating tube 10 and then enter a steam-water pipeline 30 in an economizer 1, so that the water in the steam-water pipeline 30 is in a flowing state to avoid vaporization, the heat of the flue gas is continuously absorbed, the smoke temperature is relatively reduced, the utilization rate of the high-temperature flue gas is increased, and the steam enters a low-temperature overheating collection box 16 from a first steam tube 15 at the upper part of the boiler barrel 9, and then enters the high-temperature overheating header 17 through the steam connecting pipe 31 to change saturated steam into overheated steam, if the water content is low, the overheated steam can directly enter the high-temperature overheating header 17 through the second steam pipe 18, and then enters the gas collecting tank 19 through the connecting pipeline 32, and finally is discharged through the steam discharging pipe 21 to be supplied to the steam turbine for power generation.

The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.

Claims (7)

1. The utility model provides an energy-efficient exhaust-heat steam boiler, includes economizer (1) and water heater collection case (2) and drum (9) and one-level evaporimeter (11) and second grade evaporimeter (12), low temperature overheat collection case (16) and high temperature overheat collection case (17) and gas collection case (19) and chimney (4), its characterized in that: the water heater is characterized in that the top and the bottom of the coal economizer (1) are fixedly connected with a cover (7), a plurality of steam-water pipelines (30) are fixedly installed inside the coal economizer (1), four partition plates (29) are fixedly connected with the outer walls of the steam-water pipelines (30) inside the coal economizer (1), a first shunt pipe (5) is inserted into a water inlet of the steam-water pipelines (30), a second elbow (27) is inserted into a water outlet of the water heater header (2), a water inlet pipe (28) is inserted into a water inlet of the water heater header (2), the other end of the second elbow (27) is inserted into the first shunt pipe (5), a second shunt pipe (6) is inserted into a water outlet of the steam-water pipelines (30), a water diversion pipe (8) is inserted into one end of the second shunt pipe (6), the other end of the water diversion pipe (8) is inserted into the boiler barrel (9), one end of the first shunt pipe (5) is inserted into a return pipe (10), the other end of the boiler barrel (9) is inserted into a water diversion pipe (13), the other end of the circulation pipe (10) is inserted into the boiler barrel (13), the other end of the first recirculation pipe (7) is inserted into the boiler barrel (20), and a second flue gas recirculation pipe (12) is inserted into the top of the first flue gas recirculation pipe (7), a second flue gas passing pipe (26) is inserted between the secondary evaporator (12) and the primary evaporator (11), and the second flue gas passing pipe (26) is communicated with the first flue gas passing pipe (20).

2. An energy-efficient steam heat boiler according to claim 1, characterized in that: the boiler comprises a primary evaporator (11), a plurality of evaporator tubes (24) are fixedly mounted inside the primary evaporator (11) and the secondary evaporator (12), a down pipe (23) and an up pipe (14) are inserted inside a boiler barrel (9), the down pipe (23), the up pipe (14) and a return pipe (13) penetrate through one end of the secondary evaporator (12) and are located inside the primary evaporator (11), a first elbow (25) is inserted into the outer wall of the up pipe (14), and the other end of the first elbow (25) is inserted into the bottom of the return pipe (13).

3. An energy-efficient steam heat boiler according to claim 2, characterized in that: one end of each of the evaporator tubes (24) is inserted into the interior of the downcomer (23), the other end of each of the evaporator tubes (24) is inserted into the interior of the riser (14), and a flue gas inlet tube (22) is inserted into one side of the primary evaporator (11).

4. An energy efficient steam heat boiler according to claim 1, characterized in that: the boiler is characterized in that a first steam pipe (15) is inserted into the top of the boiler barrel (9), the other end of the first steam pipe (15) is inserted into the low-temperature overheating collection box (16), a second steam pipe (18) is inserted into the outer wall of the first steam pipe (15), the other end of the second steam pipe (18) is inserted into the high-temperature overheating collection box (17), a steam connecting pipe (31) is inserted into one side of the low-temperature overheating collection box (16), and the other end of the steam connecting pipe (31) is inserted into the high-temperature overheating collection box (17).

5. An energy efficient steam heat boiler according to claim 4, characterized in that: a connecting pipeline (32) is inserted between the high-temperature overheating collecting box (17) and the gas collecting box (19), and a steam discharge pipe (21) is inserted at the exhaust end of the gas collecting box (19).

6. An energy-efficient steam heat boiler according to claim 1, characterized in that: the bottom of one of the cover (7) is inserted with a smoke exhaust pipe (3), and the other end of the smoke exhaust pipe (3) is connected with the air inlet end of the chimney (4).

7. An energy efficient steam waste heat boiler according to claim 1, characterized in that; valves are arranged inside the circulating pipe (10), the return pipe (13) and the first steam pipe (15) and the second steam pipe (18).

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