CN210533075U - Novel high-efficient cement kiln hood combined overheating waste heat boiler - Google Patents
Novel high-efficient cement kiln hood combined overheating waste heat boiler Download PDFInfo
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- CN210533075U CN210533075U CN201921440315.2U CN201921440315U CN210533075U CN 210533075 U CN210533075 U CN 210533075U CN 201921440315 U CN201921440315 U CN 201921440315U CN 210533075 U CN210533075 U CN 210533075U
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Abstract
The utility model discloses a novel high-efficiency cement kiln head combined overheating waste heat boiler, wherein an inlet flue expansion joint, a high-temperature zone heating surface flue, a buffer flue expansion joint, a low-temperature zone heating surface flue and an outlet flue are arranged in a vertical flue from bottom to top; condensed water is sent into a water heater through a water feeding pump, then enters a coal economizer or a temperature reduction adjusting device, then enters a boiler barrel through the coal economizer, circularly returns to the boiler barrel through a primary evaporator and a secondary evaporator, is output to a mixing header, and then forms steam with qualified quality through a low-temperature superheater, a medium-temperature superheater, the temperature reduction adjusting device and a high-temperature superheater. The utility model discloses an adaptable 500 ~ 800 ℃ high temperature waste heat waste flue gas of exhaust-heat boiler is undulant to can realize the temperature control of steam.
Description
Technical Field
The utility model relates to an utilize kiln head exhaust-heat boiler of superheated steam electricity generation, especially relate to an utilize kiln head exhaust-heat boiler that recovery cement kiln head and kiln tail waste heat production saturated steam is used for the electricity generation.
Background art:
in the cement kiln waste heat power generation system, the conventional kiln head waste heat boiler can only adapt to the fluctuation of waste heat and waste flue gas below 500 ℃, and when the temperature and the flue gas quantity of the waste gas at the outlet of the kiln head grate cooler fluctuate greatly, on one hand, the flow velocity of dust particles entering the kiln head waste heat boiler is increased, and the abrasion rate of a heating surface is accelerated; on the other hand, superheated steam will have steam over-temperature, over-pressure and cannot be regulated. The boiler is easy to cause pipe explosion safety accidents caused by the abrasion of particles on the pipe wall of a heating surface and overtemperature when operated under the fluctuation working condition for a long time, the service life of steam turbine equipment can be shortened by overheating steam and overpressure, and the safety and the economical efficiency of waste heat power generation are greatly influenced.
Disclosure of Invention
The utility model aims to solve the technical problem that a cement kiln hood that can adapt to kiln hood grate cooler export waste gas 500 ~ 800 ℃ big fluctuation high temperature waste heat exhaust gas is provided to can carry out the cement kiln hood that adjusts to steam temperature jointly overheated exhaust-heat boiler.
In order to solve the technical problem, the novel high-efficiency cement kiln head combined overheating waste heat boiler comprises an inlet flue expansion joint, a high-temperature zone heating surface flue is connected above the inlet flue expansion joint, a buffer flue expansion joint is connected above the high-temperature zone heating surface flue, a low-temperature zone heating surface flue is connected above the buffer flue expansion joint, an outlet flue is connected above the low-temperature zone heating surface flue, and a high-temperature superheater, a medium-temperature superheater and a low-temperature superheater are sequentially arranged in the high-temperature zone heating surface flue from bottom to top; a primary evaporator, a secondary evaporator, an economizer and a water heater are sequentially arranged in the flue of the heating surface of the low-temperature zone from bottom to top; the lower header of the primary evaporator is connected with the drum through a first descending pipe, and the upper header of the primary evaporator is connected with the drum through a first ascending pipe; the lower header of the secondary evaporator is connected with the drum through a second descending pipe, and the upper header of the secondary evaporator is connected with the drum through a second ascending pipe; the boiler barrel is connected with the mixing header through a saturated steam connecting pipe; the outlet end of the mixing header is connected with an upper header of the low-temperature superheater; the lower header of the low-temperature superheater is connected with the upper header of the medium-temperature superheater; the lower header of the medium-temperature superheater is connected with a temperature reduction adjusting device; the temperature reduction adjusting device is connected with an upper header of the high-temperature superheater; the upper header of the water heater is connected with a water feeding pump through a water feeding pipeline, and the lower header of the water heater is connected with the lower header of the economizer through a pipeline; the upper header of the economizer is connected with the drum through a pipeline; a temperature reduction water pipeline is connected to a pipeline between a lower collecting tank of the economizer and a lower collecting tank of the water heater, the other end of the temperature reduction water pipeline is connected with a temperature reduction adjusting device, and the temperature reduction water pipeline is provided with an adjusting device and an adjusting valve; and the mixing header is connected with the kiln tail boiler through a second saturated steam connecting pipe.
According to the further optimization of the scheme, the high-temperature superheater, the medium-temperature superheater and the low-temperature superheater all adopt light pipe serpentine tube group suspension type structures.
According to the further optimization of the scheme, the 3-6 rows of tube bundles in front of the windward side of the high-temperature superheater adopt a 240 ℃ anti-abrasion cover structure.
According to the further optimization of the scheme, a spiral fin tube type false pipe is arranged between the high-temperature superheater and the inlet flue expansion joint.
According to the further optimization of the scheme, the primary evaporator and the secondary evaporator adopt a single-stroke independent circulating inclined arrangement structure.
According to the further optimization of the scheme, the primary evaporator, the secondary evaporator, the economizer and the water heater all adopt spiral finned tube box structures.
According to the further optimization of the scheme, steel frames are arranged on the outer sides of the inlet flue expansion joint, the high-temperature zone heating surface flue and the buffer flue expansion joint.
According to the further optimization of the scheme, the high-temperature superheater, the medium-temperature superheater and the low-temperature superheater are all self-supporting structures and are supported on the lower beam of the steel frame; the first-stage evaporator, the second-stage evaporator, the economizer and the water heater are all self-supporting structures and are supported on a middle beam of the steel frame.
The utility model has the advantages that:
(1) the utility model discloses a kiln head jointly overheated exhaust-heat boiler sets up the heating surface structural style according to flue gas temperature subregion, adopts fluorescent lamp coiled tube group suspension type structure in the high temperature district section, and this structure is effectual to have guaranteed that the tube bank is heated free expansion, and the low temperature section adopts spiral finned tube case self-supporting structure, and simple to operate accounts for the space little.
(2) The spiral finned tube type dummy tube is arranged in front of the high-temperature superheater, a 240-DEG C wear-resistant cover structure is adopted for 3-6 rows of tube bundles in front of the windward side, double protection is achieved, abrasion of large particle ash in flue gas is effectively prevented, a proper waste gas flow field is organized, heat exchange is enhanced, and the service life of equipment is prolonged.
(3) And a combined overheating structure is adopted, so that the saturated steam at the tail of the kiln is heated to the overheating steam, and the power generation efficiency of the system is improved.
(4) Design attemperator between high temperature over heater and the medium temperature over heater, the main steam that effectual solution cement kiln production process flue gas fluctuation caused is super temperature and the technical problem of the incident of the super temperature booster of superheater pipe that arouses, and equipment such as steam turbine safe effectual operation can be guaranteed to stable main steam simultaneously, reduces the maintenance number of times, improves power generation system's stability and annual operating duration.
(5) The primary evaporator and the secondary evaporator adopt a single-stroke independent circulating inclined arrangement structure, the circulating power is strong, and the water circulation is safe and reliable.
(6) The heating surface is self-supported on the lower part and the middle beam of the steel frame in a partitioning mode, so that the load of the heating surface pipe box in a high-temperature area is effectively reduced, and meanwhile, the heating surface pipe box can expand freely.
(7) The high-temperature zone heating surface flue and the low-temperature zone heating surface flue are connected through a buffer flue expansion joint, so that expansion is effectively absorbed, and the safety of equipment is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of the steam-water flow of the present invention.
Fig. 3 is a schematic view of the spiral fin tube type false tube in the scheme of the present invention.
Fig. 4 is a schematic side view of the spiral fin tube type dummy tube in fig. 3.
Fig. 5 is a schematic view of a 240 ℃ wear-proof cover according to the present invention.
Fig. 6 is a schematic side view of the 240 ℃ wear prevention cover in fig. 5.
Detailed Description
The high-temperature superheater 4, the medium-temperature superheater 3, the low-temperature superheater 2, the primary evaporator 6, the secondary evaporator 7, the economizer 8 and the water heater 9 are all special names in the field of boilers, and the connection modes mentioned in the text refer to pipeline connection unless otherwise specified.
With reference to fig. 1 and 2, the utility model discloses a novel high-efficient cement kiln hood combined overheating exhaust-heat boiler, whole boiler flue is vertical to be arranged. The inlet of the flue is upwards provided with an inlet flue expansion joint 1, a high-temperature zone heating surface flue 13, a buffer flue expansion joint 5, a low-temperature zone heating surface flue 14 and an outlet flue 10 in sequence, and the components are connected by welding to form the whole flue.
A high-temperature superheater 4, a medium-temperature superheater 3 and a low-temperature superheater 2 are sequentially arranged in a high-temperature-region heating surface flue 13 from bottom to top, and a primary evaporator 6, a secondary evaporator 7, an economizer 8 and a water heater 9 are sequentially arranged in a low-temperature-region heating surface flue 14 from bottom to top.
A steel frame 12 is arranged outside the flue, and the boiler barrel 11 is placed on the upper portion of the steel frame 12.
An upper header and a lower header of the primary evaporator are respectively connected with the drum 11 through a first ascending pipe 15 and a first descending pipe 16; the lower header and the upper header of the secondary evaporator are respectively connected with the drum 11 through a second downcomer 17 and a second riser 18. The boiler barrel 11 is connected with a mixing header 20 through a saturated steam connecting pipe 19, the outlet end of the mixing header 20 is connected with an upper header of a low-temperature superheater, a lower header of the low-temperature superheater is connected with an upper header of a medium-temperature superheater, the lower header of the medium-temperature superheater is connected with a temperature reduction adjusting device 21, and the temperature reduction adjusting device 21 is connected with the upper header of the high-temperature superheater.
The feed pump 25 is connected to the upper header of the water heater through a feed line 26, the lower header of the water heater is connected to the lower header of the economizer through a pipe 27, and the upper header of the economizer is connected to the drum 11 through a pipe 27.
The pipeline 27 between the economizer 8 and the water heater 9 is connected with a temperature-reducing water pipeline 22, the other end of the temperature-reducing water pipeline 22 is connected with a temperature-reducing adjusting device 21, the temperature-reducing water pipeline 22 is provided with an adjusting device 23 and an adjusting valve 24, and the adjusting device 23 is arranged at the side of the temperature-reducing adjusting device 21.
The mixing header 20 is connected with the kiln tail boiler through a second saturated steam connecting pipe 29.
Referring to fig. 1, the smoke flow in the scheme is as follows:
high-temperature flue gas → inlet flue expansion joint 1 → high-temperature superheater 4 → medium-temperature superheater 3 → low-temperature superheater 2 → buffer flue expansion joint 5 → primary evaporator 6 → secondary evaporator 7 → economizer 8 → water heater 9 → outlet flue 10.
Referring to fig. 2, the steam-water flow in the scheme is as follows:
the water feeding pump 25 sends the condensed water into the water heater 9 through the water feeding pipeline 26, the condensed water is sent into the economizer 8 through the pipeline 27 after being heated, the hot water heated to a certain pressure and temperature is sent into the boiler barrel 11 through the pipeline 27, then the hot water is led out from the boiler barrel, the hot water flows into the primary evaporator 6 and the secondary evaporator 7 through the first descending pipe 16 and the second descending pipe 17, the steam-water mixture heated in the boiler barrel is led back to the boiler barrel 11 through the first ascending pipe 15 and the second ascending pipe 18, then the saturated steam led out from the boiler barrel 11 is led into the mixing header 20 through the saturated steam connecting pipe 19 and the saturated steam from the kiln tail boiler through the second saturated steam connecting pipe 29, the two saturated steams are fully mixed and then enter the low-temperature superheater 2 together for overheating, then enter the medium-temperature superheater 3 for continuous heat absorption, the high-temperature superheater 4 is led in through the temperature reduction adjusting device 21 for continuous overheating, the hot water from the water heater 9 is adjusted by the adjusting valve 24 and the adjusting device 23 to spray water, and finally is heated into qualified superheated steam by the adjustment of the temperature-reducing adjusting device 21.
See fig. 3 to 6 for spiral fin tube type false tubes and 240 ℃ wear prevention cover structure.
A spiral fin tube type dummy tube 31 is arranged in front of the high-temperature superheater 4, a 240-DEG C abrasion-proof cover 32 structure is adopted for 3-6 tube bundles in front of the windward side, double protection is achieved, abrasion of large particle ash in flue gas is effectively prevented, a proper waste gas flow field is organized, heat exchange is enhanced, and the service life of equipment is prolonged.
Claims (8)
1. The utility model provides a novel high-efficient cement kiln hood is overheated exhaust-heat boiler jointly, includes the import flue expansion joint, the top of import flue expansion joint is connected with the high temperature district heating surface flue, high temperature district heating surface flue top is connected with the buffering flue expansion joint, buffering flue expansion joint top is connected with the low temperature district heating surface flue, low temperature district heating surface flue top is connected with export flue, its characterized in that: a high-temperature superheater, a medium-temperature superheater and a low-temperature superheater are sequentially arranged in the high-temperature zone heating surface flue from bottom to top; a primary evaporator, a secondary evaporator, an economizer and a water heater are sequentially arranged in the flue of the heating surface of the low-temperature zone from bottom to top; the lower header of the primary evaporator is connected with the drum through a first descending pipe, and the upper header of the primary evaporator is connected with the drum through a first ascending pipe; the lower header of the secondary evaporator is connected with the drum through a second descending pipe, and the upper header of the secondary evaporator is connected with the drum through a second ascending pipe; the boiler barrel is connected with the mixing header through a saturated steam connecting pipe; the outlet end of the mixing header is connected with an upper header of the low-temperature superheater; the lower header of the low-temperature superheater is connected with the upper header of the medium-temperature superheater; the lower header of the medium-temperature superheater is connected with a temperature reduction adjusting device; the temperature reduction adjusting device is connected with an upper header of the high-temperature superheater; the upper header of the water heater is connected with a water feeding pump through a water feeding pipeline, and the lower header of the water heater is connected with the lower header of the economizer through a pipeline; the upper header of the economizer is connected with the drum through a pipeline; a temperature reduction water pipeline is connected to a pipeline between a lower collecting tank of the economizer and a lower collecting tank of the water heater, the other end of the temperature reduction water pipeline is connected with a temperature reduction adjusting device, and the temperature reduction water pipeline is provided with an adjusting device and an adjusting valve; and the mixing header is connected with the kiln tail boiler through a second saturated steam connecting pipe.
2. The novel high-efficiency cement kiln head combined overheating waste heat boiler as claimed in claim 1, wherein: the high-temperature superheater, the medium-temperature superheater and the low-temperature superheater are all of light tube serpentine tube group suspension type structures.
3. The novel high-efficiency cement kiln head combined overheating waste heat boiler as claimed in claim 1, wherein: and 3-6 rows of tube bundles in front of the windward side of the high-temperature superheater adopt a 240 ℃ anti-abrasion cover structure.
4. The novel high-efficiency cement kiln head combined overheating waste heat boiler as claimed in claim 1, wherein: and a spiral fin tube type dummy tube is arranged between the high-temperature superheater and the inlet flue expansion joint.
5. The novel high-efficiency cement kiln head combined overheating waste heat boiler as claimed in claim 1, wherein: the primary evaporator and the secondary evaporator adopt a single-stroke independent circulating inclined arrangement structure.
6. The novel high-efficiency cement kiln head combined overheating waste heat boiler as claimed in claim 1, wherein: the primary evaporator, the secondary evaporator, the economizer and the water heater all adopt spiral finned tube box structures.
7. The novel high-efficiency cement kiln head combined overheating waste heat boiler as claimed in claim 1, wherein: and steel frames are arranged outside the inlet flue expansion joint, the high-temperature zone heating surface flue and the buffer flue expansion joint.
8. The novel high-efficiency cement kiln head combined overheating waste heat boiler as claimed in claim 7, wherein: the high-temperature superheater, the medium-temperature superheater and the low-temperature superheater are all self-supporting structures and are supported on a lower beam of the steel frame; the first-stage evaporator, the second-stage evaporator, the economizer and the water heater are all self-supporting structures and are supported on a middle beam of the steel frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921440315.2U CN210533075U (en) | 2019-09-02 | 2019-09-02 | Novel high-efficient cement kiln hood combined overheating waste heat boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921440315.2U CN210533075U (en) | 2019-09-02 | 2019-09-02 | Novel high-efficient cement kiln hood combined overheating waste heat boiler |
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| CN210533075U true CN210533075U (en) | 2020-05-15 |
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| CN201921440315.2U Active CN210533075U (en) | 2019-09-02 | 2019-09-02 | Novel high-efficient cement kiln hood combined overheating waste heat boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623337A (en) * | 2020-06-23 | 2020-09-04 | 江苏太湖锅炉股份有限公司 | Natural circulation ferrosilicon exhaust-heat boiler circulation system |
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2019
- 2019-09-02 CN CN201921440315.2U patent/CN210533075U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623337A (en) * | 2020-06-23 | 2020-09-04 | 江苏太湖锅炉股份有限公司 | Natural circulation ferrosilicon exhaust-heat boiler circulation system |
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Address after: 226014 No.133, Zhongxiu Middle Road, Chongchuan District, Nantong City, Jiangsu Province Patentee after: Nantong Wanda Energy Power Technology Co.,Ltd. Address before: 226014 No.133, Zhongxiu Middle Road, Chongchuan District, Nantong City, Jiangsu Province Patentee before: NANTONG WANDA BOILER Co.,Ltd. |