CN216079739U - Novel cement kiln head membrane type water-cooled wall integrated waste heat boiler - Google Patents
Novel cement kiln head membrane type water-cooled wall integrated waste heat boiler Download PDFInfo
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- CN216079739U CN216079739U CN202121513676.2U CN202121513676U CN216079739U CN 216079739 U CN216079739 U CN 216079739U CN 202121513676 U CN202121513676 U CN 202121513676U CN 216079739 U CN216079739 U CN 216079739U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a novel integrated waste heat boiler with a membrane water-cooled wall at the kiln head of a cement kiln, which comprises the membrane water-cooled wall, a superheater, an evaporator, an economizer and a drum, and is characterized in that: the economizer is provided with an economizer inlet header and an economizer outlet header, a membrane wall inlet header and a membrane wall outlet header are arranged on the membrane water-cooled wall, a water feeding pipe is arranged on the membrane wall inlet header, a branch of the water feeding pipe is connected with the membrane wall inlet header, the boiler adopts an integrated design, a settling chamber is omitted, the boiler is directly connected with a grate cooler, boiler resistance can be effectively reduced, smoke with higher temperature is obtained simultaneously, the membrane water-cooled wall is arranged in a cavity at the bottom of the boiler, boiler evaporation capacity is remarkably improved through radiation heat exchange effect, boiler smoke exhaust temperature is reduced, the cavity at the bottom of the boiler is provided with the membrane water-cooled wall, the integral air tightness of the boiler is better, air leakage rate is reduced, heat dissipation loss is reduced, and the heat efficiency of the boiler is improved.
Description
Technical Field
The application relates to the technical field of cement kiln waste heat recovery, in particular to a novel cement kiln head membrane type water-cooled wall integrated waste heat boiler.
Background
In recent years, pure low-temperature waste heat power generation technology is continuously used in a novel dry-process cement kiln, a newly-built cement line and a waste heat power generation station can be synchronously built, the occupied area is considered in unified design, the arrangement is compact, the air pipe resistance is reduced, the loss of the temperature of inlet smoke air is reduced, a kiln head boiler can be directly arranged on a grate cooler platform in the design, the opening of the grate cooler is large, the grate cooler is directly connected with the inlet of the boiler, most of grate cooler opening air pipes need to be provided with a castable abrasion-proof material, a large amount of smoke radiation heat is wasted, the existing boiler arrangement scheme is combined, a membrane water-cooling wall integrated waste heat boiler is adopted, a large amount of smoke radiation heat exchange can be absorbed, the castable is cancelled, the waste heat utilization efficiency is improved, and the generated energy is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel cement kiln head membrane water-cooled wall integrated waste heat boiler to solve the problems in the background technology.
The embodiment of the application adopts the following technical scheme:
a novel cement kiln head membrane water-cooled wall integrated waste heat boiler comprises a membrane water-cooled wall, a superheater, an evaporator, an economizer and a boiler drum, wherein an economizer inlet header and an economizer outlet header are arranged on the economizer, a membrane water-cooled wall inlet header and a membrane water-cooled wall outlet header are arranged on the membrane water-cooled wall, a water feed pipe is arranged on the membrane water-cooled wall inlet header, a branch of the water feed pipe is connected with the membrane water-cooled wall inlet header, a water inlet pipe is arranged on the economizer outlet header, an evaporator inlet header and an evaporator outlet header are arranged on the evaporator, a down pipe is arranged on the evaporator inlet header, a riser is arranged on the evaporator outlet header, a branch pipe of the riser is connected with the membrane water-cooled wall outlet header, a superheater inlet header and a superheater outlet header are arranged on the superheater, the superheater inlet header is provided with a steam guide pipe, and the boiler body is provided with a flue gas inlet and a flue gas outlet.
Preferably, the economizer outlet header is connected with the drum through a water inlet pipe.
Preferably, the evaporator inlet header is connected to the drum via a downcomer.
Preferably, the evaporator outlet header is connected with the drum through a riser.
Preferably, the superheater inlet header is connected with the drum through a steam guide pipe.
Preferably, the superheater outlet header is connected with a steam pipeline outside the boiler body, the flue gas inlet is connected with a wind intake of the grate cooler, and the flue gas outlet is connected with a dust removal device through a flue gas pipeline outside the boiler.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
firstly, the boiler adopts an integrated design, a settling chamber is omitted, the boiler is directly connected with a grate cooler, the resistance of the boiler can be effectively reduced, and meanwhile, the flue gas with higher temperature is obtained.
And secondly, a membrane water-cooled wall is arranged in a cavity at the bottom of the boiler, so that the evaporation capacity of the boiler is obviously improved and the exhaust gas temperature of the boiler is reduced under the radiation heat exchange effect.
And thirdly, the cavity at the bottom of the boiler is provided with a membrane type water-cooled wall, so that the whole air tightness of the boiler is better, the air leakage rate is reduced, the heat dissipation loss is reduced, and the heat efficiency of the boiler is improved.
Fourthly, the cavity at the bottom of the boiler is provided with the membrane water-cooling wall, the cavity is not required to be filled with refractory materials, the cavity is externally provided with heat preservation measures, the whole weight of the boiler can be reduced, and the cavity at the bottom of the boiler is provided with the membrane water-cooling wall, so that the boiler is more convenient to install.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic view of the overall structure of the boiler;
fig. 2 is a schematic structural view of the installation of the boiler.
In the figure: 1. a membrane wall; 10. an economizer inlet header; 11. an economizer outlet header; 12. an evaporator outlet header; 13. a superheater outlet header; 14. a membrane wall outlet header; 15. a membrane wall inlet header; 16. a water supply pipe; 17. a flue gas inlet; 18. a flue gas outlet; 2. a superheater; 20. a superheater inlet header; 3. an evaporator; 31. an evaporator inlet header; 4. a coal economizer; 5. a drum; 6. a steam guide pipe; 7. a riser pipe; 8. a down pipe; 9. and (4) a water inlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1 and 2, the utility model provides a novel cement kiln head membrane water-cooled wall integrated waste heat boiler, comprising a membrane water-cooled wall 1, a superheater 2, an evaporator 3, an economizer 4 and a boiler barrel 5, wherein the economizer 4 is provided with an economizer inlet header 10 and an economizer outlet header 11, the membrane water-cooled wall 1 is provided with a membrane water-cooled wall inlet header 15 and a membrane water-cooled wall outlet header 14, the membrane water-cooled wall inlet header 15 is provided with a water supply pipe 16, a branch of the water supply pipe 16 is connected with the membrane water-cooled wall inlet header 15, the economizer outlet header 11 is provided with a water inlet pipe 9, the evaporator 3 is provided with an evaporator inlet header 31 and an evaporator outlet header 12, the evaporator inlet header 31 is provided with a downcomer pipe 8, the evaporator outlet header 12 is provided with an ascension pipe 7, a branch pipe of the ascension pipe 7 is connected with the membrane water-cooled wall outlet header 14, be provided with over heater entry header 20 and over heater export header 13 on the over heater 2, install steam guide 6 on the over heater entry header 20, be provided with flue gas inlet 17 and exhanst gas outlet 18 on the boiler body, economizer export header 11 is connected with boiler barrel 5 through inlet tube 9, evaporimeter entry header 31 is connected with boiler barrel 5 through downcomer 8, evaporimeter export header 12 is connected with boiler barrel 5 through tedge 7, over heater entry header 20 is connected with boiler barrel 5 through steam guide 6, over heater export header 13 is connected with this external steam conduit of boiler, flue gas inlet 17 is connected with the comb formula cooler air intake, exhanst gas outlet 18 is through boiler outside flue gas pipe connection dust collector.
When the boiler is used, the air inlet pipe of the boiler and the boiler body form an integrated structure, the whole boiler is closer to the grate cooler, and the membrane water-cooling wall 1 is arranged between the opening of the grate cooler and the heat exchange pipe bundle of the boiler to form a cooling cavity. The boiler heat exchange tube bundle is sequentially provided with a superheater 2, an evaporator 3 and an economizer 4 from bottom to top, high-temperature flue gas directly enters a cooling cavity from a grate cooler, the high-temperature flue gas is cooled in the cavity under the action of a membrane water wall 1, the generated saturated water and the saturated water of the evaporator 3 enter a boiler drum 5, steam separated from the drum 5 enters the superheater 2 to be superheated to generate superheated steam, a settling chamber is not arranged at the bottom of the boiler, a boiler flue gas inlet is directly connected with the grate cooler to form an integrated structure, a traditional cement kiln head waste heat boiler is connected with the grate cooler through a pipeline, the boiler resistance is large, the boiler resistance can be effectively reduced by adopting the integrated structure, meanwhile, the occupied area of the boiler can be reduced without the settling chamber, a feeder, a conveyor and the like can be cancelled, naturally settled dust particles and the like can directly return to the grate cooler, the problems of boiler ash discharge and conveying do not need to be considered;
the membrane type water-cooling wall 1 is arranged in a cavity at the bottom of a boiler, the heat efficiency of the boiler can be obviously improved by adopting the membrane type water-cooling wall 1, the temperature of the smoke gas at the inlet of the traditional kiln head waste heat boiler is 350-380 ℃, the temperature of the smoke gas can reach 450-500 ℃ when the boiler with an integrated structure is installed and is closer to the air intake position of a grate cooler, the evaporation capacity of the boiler can be improved by utilizing the membrane type water-cooling wall 1 to absorb the radiation heat of the smoke gas, the temperature of the smoke gas at the outlet of the boiler can be effectively reduced, when the temperature of the smoke gas fluctuates, the normal operation of the boiler can be ensured by adjusting the water flow of the membrane type water-cooling wall 1, the membrane type water-cooling wall 1 can be directly split when the temperature of the smoke gas is too low, the air tightness in the boiler can be better by arranging the water-cooling wall in the cavity at the bottom of the boiler, the air leakage rate is reduced, the heat efficiency of the boiler is improved, and the membrane type water-cooling wall 1 is arranged in the cavity at the bottom of the boiler, only need lay insulation material in the cavity outside, need not additionally to increase refractory material inside the cavity, so not only make furnace body structure simplify, can also alleviate boiler weight. In addition, the membrane water wall 1 is convenient to install;
flue gas (450-500 ℃) from a grate cooler firstly enters a cavity at the bottom of a boiler through a flue gas inlet 17, and performs radiation heat exchange with a membrane water-cooled wall 1 in the cavity, the temperature of the flue gas is reduced (350-380 ℃), and then the flue gas sequentially passes through a superheater 2, an evaporator 3 and an economizer 4 from bottom to top, and finally enters a dust removal system through a flue gas outlet 18;
the boiler adopts natural circulation, demineralized water is pressurized by a water feeding pump and then respectively enters an inlet header 10 of a boiler economizer and an inlet header 15 of a membrane water-cooling wall, the water absorbs heat by the economizer 4 and is heated to a saturation temperature slightly lower than the pressure of a drum 5, then enters the drum 5, the water entering the drum 5 is mixed with saturated water in the drum 5, enters an evaporator through a downcomer 8 of the drum 5 and is further heated to the saturation temperature (steam-water mixture), the water is directly heated to the saturation temperature in the membrane water-cooling wall 1 through the radiation heat exchange effect with flue gas, the heated saturated water is connected to an upper riser 7 through an outlet header 14 of the membrane water-cooling wall and is mixed with saturated water (steam-water mixture) led out through an outlet header 12 of the evaporator, then enters the drum 5, and the water returns to the drum 5 through the action of a steam-water separator in the drum 5 and continues absorbing heat through the downcomer 8, the separated saturated steam reaches a superheater inlet header 20 through a steam guide pipe 6 at the upper part of the drum 5, the temperature is further increased to superheated steam, and the superheated steam is led to subsequent equipment through a superheater outlet header 13;
when the flue gas temperature is higher, the water inlet flow of the membrane water-cooled wall 1 is increased through the regulating valve, the flue gas temperature is reduced, and then the flue gas passes through the subsequent heat exchange tube bundle, so that the increase of the boiler can be increased, and the exhaust gas temperature of the boiler is reduced; when the flue gas temperature is lower, the water inlet flow of the membrane water wall 1 is reduced through the regulating valve so as to meet the tail end flue gas temperature of the superheater 2 and ensure the steam quality; when the temperature of the flue gas is too low, the regulating valve is closed, and the membrane water-cooled wall 1 is directly split without influencing the heat exchange effect of other boiler tube bundles;
the specific installation method is as follows: the method comprises the following steps that a rear opening is determined in the air taking position of a grate cooler, a boiler platform is arranged above the grate cooler platform, a boiler flue gas inlet is directly connected with the grate cooler, a membrane type water-cooling wall 1 is arranged in a bottom cavity after a boiler body is installed, an electric butterfly valve and a metal expansion joint are arranged at a position close to the grate cooler, wear-resistant castable is not needed to be added in the bottom cavity of the boiler, heat preservation is only needed for pipes, an electric butterfly valve and a metal expansion joint are arranged in a smoke exhaust pipeline at the top of the boiler, a water supply pipe 16 is connected to an inlet of a boiler economizer 4 and an inlet of the membrane type water-cooling wall 1 after a boiler body is installed, and a boiler water supply pump is generally arranged in a factory building;
this boiler adopts the integral type design, cancel the deposit room, the boiler is direct to be connected with the comb formula cooler, can effectively reduce the boiler resistance, obtain the flue gas of higher temperature simultaneously, set up membrane water-cooling wall 1 in the boiler bottom cavity, through the radiation heat transfer effect, make the boiler evaporation capacity show and improve, reduce boiler exhaust gas temperature, boiler bottom cavity sets up membrane water-cooling wall 1, make the whole gas tightness of boiler better, the air leakage rate reduces, reduce the heat dissipation loss, improve the thermal efficiency of boiler, boiler bottom cavity sets up membrane water-cooling wall 1, the cavity is inside need not to fill refractory material, the outside heat preservation measure of only taking of cavity, this can make the whole weight of boiler alleviate, boiler bottom cavity sets up membrane water-cooling wall 1, it is more convenient when the installation.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (6)
1. The utility model provides a novel cement kiln hood membrane water-cooling wall integral type exhaust-heat boiler, includes membrane water-cooling wall (1), over heater (2), evaporimeter (3), economizer (4) and drum (5), its characterized in that: the economizer (4) is provided with an economizer inlet header (10) and an economizer outlet header (11), the membrane water-cooling wall (1) is provided with a membrane water-cooling wall inlet header (15) and a membrane water-cooling wall outlet header (14), a water supply pipe (16) is arranged on the membrane water wall inlet header (15), a branch of the water supply pipe (16) is connected with the membrane water wall inlet header (15), a water inlet pipe (9) is arranged on the economizer outlet header (11), an evaporator inlet header (31) and an evaporator outlet header (12) are arranged on the evaporator (3), a downcomer (8) is arranged on the evaporator inlet header (31), an ascending pipe (7) is arranged on the evaporator outlet header (12), and a branch pipe of the ascending pipe (7) is connected with a membrane water wall outlet header (14).
2. The novel cement kiln head membrane water-cooled wall integrated waste heat boiler as claimed in claim 1, characterized in that: be provided with over heater entry header (20) and over heater export header (13) on over heater (2), install steam guide (6) on over heater entry header (20), be provided with flue gas entry (17) and exhanst gas outlet (18) on the boiler body, economizer export header (11) are connected with boiler barrel (5) through inlet tube (9).
3. The novel cement kiln head membrane water-cooled wall integrated waste heat boiler as claimed in claim 1, characterized in that: the evaporator inlet header (31) is connected with the drum (5) through a downcomer (8).
4. The novel cement kiln head membrane water-cooled wall integrated waste heat boiler as claimed in claim 1, characterized in that: the evaporator outlet header (12) is connected with the drum (5) through an ascending pipe (7).
5. The novel cement kiln head membrane water-cooled wall integrated waste heat boiler as claimed in claim 2, characterized in that: the superheater inlet header (20) is connected with the drum (5) through a steam guide pipe (6).
6. The novel cement kiln head membrane water-cooled wall integrated waste heat boiler as claimed in claim 2, characterized in that: the superheater outlet header (13) is connected with a steam pipeline outside the boiler body, the flue gas inlet (17) is connected with a wind taking port of the grate cooler, and the flue gas outlet (18) is connected with a dust removal device through a flue gas pipeline outside the boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121513676.2U CN216079739U (en) | 2021-07-05 | 2021-07-05 | Novel cement kiln head membrane type water-cooled wall integrated waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121513676.2U CN216079739U (en) | 2021-07-05 | 2021-07-05 | Novel cement kiln head membrane type water-cooled wall integrated waste heat boiler |
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| Publication Number | Publication Date |
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| CN216079739U true CN216079739U (en) | 2022-03-18 |
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| CN202121513676.2U Active CN216079739U (en) | 2021-07-05 | 2021-07-05 | Novel cement kiln head membrane type water-cooled wall integrated waste heat boiler |
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| CN (1) | CN216079739U (en) |
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- 2021-07-05 CN CN202121513676.2U patent/CN216079739U/en active Active
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