CN218154271U - Waste heat boiler of tilting header - Google Patents
Waste heat boiler of tilting header Download PDFInfo
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- CN218154271U CN218154271U CN202221633837.6U CN202221633837U CN218154271U CN 218154271 U CN218154271 U CN 218154271U CN 202221633837 U CN202221633837 U CN 202221633837U CN 218154271 U CN218154271 U CN 218154271U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model relates to an inclined type header waste heat boiler, which comprises a boiler, wherein the boiler is vertically arranged through a steel frame, and is provided with a flue gas inlet, a flue gas outlet, an ash bucket, a plurality of evaporators and an oxygen removal evaporator; an inlet header is arranged at one end of the evaporator, an outlet header is arranged at the other end of the evaporator, the inlet header is connected with the outlet header through a heating surface tube bundle, two end parts of the heating surface tube bundle are horizontally arranged, and the middle part of the heating surface tube bundle is obliquely arranged; and a shock wave pulse soot blower interface is arranged above the heating surface tube bundle of the evaporator or the oxygen removal evaporator and is connected with the shock wave pulse soot blower through a sealing device. The utility model discloses effectively solve the problem of boiler deposition and soot blower gas leakage, have stronger hydrologic cycle power, the pipe wall temperature variation that reduces the heating surface tube bank is big and the stress that produces for hydrologic cycle is stable and safe, has satisfied energy saving and emission reduction's needs, has certain economic benefits and social.
Description
Technical Field
The utility model relates to a waste heat boiler field specifically is a waste heat boiler of tilting collection case.
Background
The boiler is used for recycling the waste heat of the AOD furnace flue gas of the steel plant to generate saturated steam for external power generation. The waste heat boiler adopts a double-pressure system, medium-pressure steam is used for power generation, and low-pressure steam is used for deoxidizing in the boiler system. The AOD waste heat boiler is used as one of key waste heat recovery devices of AOD steel making furnaces of steel mills, the reliability of the AOD waste heat boiler directly influences the operation of the AOD furnace steel making process, and meanwhile, the AOD waste heat boiler has a decisive effect on reducing energy consumption of steel per ton, has good economic benefits and has great significance on energy conservation and emission reduction career of China. The AOD furnace flue gas has a large dust content, dust can be attached to the inner wall of a boiler or a heating surface tube bundle, the waste heat recovery efficiency of the system is reduced, and the existing soot blower vibrates along with long-term soot blowing to cause air leakage of a sealing device and pollution to the field environment. The periodic fluctuation of the smoke temperature is large, the temperature of the tube wall of the heating surface tube bundle is easily increased, the heat transfer is deteriorated, and the tube explosion phenomenon can be generated on the heating surface tube bundle when the temperature is serious.
In order to solve the above problems, workers in the field have made different studies on waste heat boilers with inclined headers: chinese patent publication No. CN202432495U discloses a multi-surface multi-return-stroke corner tube type waste heat boiler, which comprises four vertical tubes with certain strength distributed at four corners of the boiler, two ascending tubes and two descending tubes, wherein the upper ends of the two descending tubes are communicated with and support the boiler barrel, the lower ends of the two ascending tubes and the descending tubes are connected with a base, evaporator tube bundles are arranged below the boiler barrel and are arranged in a plurality of rows which are parallel up and down, two ends of the same row of evaporator tube bundles are respectively communicated with a header tube, two ends of the two header tubes are respectively communicated with the ascending tubes and the descending tubes, a plugging mechanism is arranged in the two ascending tubes and the descending tubes and is positioned below the lowest header of the evaporator tube bundles, a smoke inlet pipe and a smoke outlet pipe are respectively arranged on a side plate of the smoke box, and a baffle plate is arranged in the smoke box, and the evaporator tube bundles pass through the end edges of the three baffle plates which are connected with the smoke box. The utility model discloses equipment cost is low, occupation space is little, on-the-spot simple to operate. However, in the technical scheme, the effect of removing dust in the boiler is poor, dust can be attached to the heating surface tube bundle, and the system waste heat recovery efficiency is reduced.
Therefore, there is a need for further improvement of the inclined header type waste heat boiler to solve the above-mentioned disadvantages.
Disclosure of Invention
The purpose of the application is: the waste heat boiler with the inclined collecting box solves and overcomes the defects of the prior art and application, effectively solves the problems of boiler dust deposition and soot blower air leakage, has strong water circulation power, reduces stress generated by large temperature change of the tube wall of the heating surface tube bundle, ensures stable and safe water circulation, simultaneously recovers the waste heat of flue gas, meets the requirements of energy conservation and emission reduction, and has certain economic benefit and social benefit.
The waste heat boiler comprises a boiler, wherein the boiler is vertically arranged through a steel frame, and is provided with a flue gas inlet, a flue gas outlet, an ash bucket, a plurality of evaporators and an oxygen removal evaporator;
an inlet header is arranged at one end of the evaporator, an outlet header is arranged at the other end of the evaporator, the inlet header is connected with the outlet header through a heating surface tube bundle, two end parts of the heating surface tube bundle are horizontally arranged, and the middle part of the heating surface tube bundle is obliquely arranged;
and a shock wave pulse soot blower interface is arranged above the heating surface tube bundle of the evaporator or the oxygen removal evaporator, the shock wave pulse soot blower interface is connected with the shock wave pulse soot blower through a sealing device, and the shock wave pulse soot blower is supported on the boiler main body through a steel frame or is fixed on the steel frame.
Preferably, the inlet header is communicated with a downcomer and the outlet header is communicated with an riser.
Preferably, the steel frame is formed by welding a horizontal steel body and a vertical steel body at intervals, and two ends of the heating surface beam tube are fixedly connected with the horizontal steel bodies with different heights respectively.
Preferably, the horizontal inclination angle of the heated surface tube is 30-60 °.
Preferably, the sealing device comprises a sealing sleeve which is of a hollow structure, and the shock pulse soot blower comprises a spray pipe which penetrates through the sealing sleeve and extends to the inner wall of the boiler.
Preferably, the fixed embedding boiler wall body of sealing sleeve one end, the fixed welding of other end has expansion joint and sealing ring, the sealing ring fixed seal in the spray tube outer wall.
Preferably, the front end of the inner cavity of the sealing sleeve is provided with a guide ring, and the guide ring is fixedly sleeved on the outer wall of the spray pipe.
Preferably, rubber linings are filled between the inner cavity of the sealing sleeve and the outer wall of the spray pipe and between the guide ring and the sealing ring.
Compared with the prior art, the application has the following obvious advantages and effects:
1. the utility model discloses in, evaporimeter one end is equipped with the import collection box, and the other end is equipped with the export collection box, and the import collection box is connected through receiving the hot side tube bank with the export collection box, and the import collection box is linked together with the downtake, and the export collection box is linked together with the tedge. The two end parts of the heating surface tube bundle are horizontally arranged, and the middle part of the heating surface tube bundle is obliquely arranged. The inclined arrangement of the heating surface tube bundle not only enables accumulated dust blown off by the shock wave pulse soot blower to fall down, but also has stronger water circulation power due to the larger inclination angle of the heating surface tube bundle, reduces the stress generated by the large temperature change of the tube wall of the heating surface tube bundle, and enables the water circulation to be stable and safe. Meanwhile, the waste heat of the flue gas is recovered, the requirements of energy conservation and emission reduction are met, and certain economic benefits and social benefits are achieved. (refer to the beneficial effects of the Natural circulation boiler)
2. The utility model discloses in, be equipped with shock wave pulse soot blower interface above the heating surface tube bank of evaporimeter or oxygen removal evaporimeter, shock wave pulse soot blower interface is connected with the shock wave pulse soot blower through sealing device, and the shock wave pulse soot blower supports in the boiler main part through the steelframe, or hangs or be fixed in on the steelframe. The spray pipe of the shock wave pulse soot blower is fixedly arranged on the wall body of the boiler, soot deposition on a heating surface pipe bundle and the inner wall of the boiler is effectively reduced, smoke and dust are blown down to the soot hopper, the waste heat recovery efficiency of the system is improved, meanwhile, the shock wave pulse soot blower has the advantages of stability, reliability and capability of remarkably reducing vibration of the shock wave pulse soot blower during soot blowing through the sealing sleeve, and the service life of equipment is further prolonged.
Drawings
Fig. 1 is a diagram of the overall structural arrangement of the present application.
Fig. 2 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1 of the present application.
Fig. 3 is a cross-sectional view taken along line B-B of fig. 1 of the present application.
FIG. 4 is a schematic view of a heated surface tube bundle according to the present application.
Fig. 5 is a schematic view of the structure of the sealing device in the present application.
Reference numbers in this application:
the boiler comprises a boiler 100, a boiler wall body 101, a flue gas inlet 1, a flue gas outlet 2, an ash bucket 3, an evaporator 4, an inlet header 41, an outlet header 42, a downcomer 43, an ascending pipe 44, a heating surface tube bundle 45, an oxygen removal evaporator 5, a shock wave pulse soot blower interface 6, a shock wave pulse soot blower 7, a steel frame 8, a vertical steel body 81, a horizontal steel body 82, a sealing device 9, a sealing sleeve 91, an expansion joint 92, a sealing ring 93, a guide ring 94 and a rubber liner 95.
Detailed Description
Specific embodiments thereof are described in connection with the figures and the following description to teach those skilled in the art how to make and use the best mode of the application. For the purpose of teaching application principles, the following conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations from these embodiments that fall within the scope of the application. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the present application. In the present application, the terms "upper", "lower", "left", "right", "middle" and "one" are used for clarity of description, and are not used to limit the scope of the invention, and the relative relationship between the terms and the corresponding terms may be changed or adjusted without substantial technical change. Thus, the present application is not limited to the specific embodiments described below, but only by the claims and their equivalents.
Fig. 1 to 5 show that an embodiment of an inclined type header waste heat boiler 100100 of the present application includes a boiler 100, the boiler 100 is vertically arranged by a steel frame 8, the boiler 100 is provided with a flue gas inlet 1, a flue gas outlet 2, an ash bucket 3, a plurality of evaporators 4, and an oxygen removal evaporator 5; an inlet header 41 is arranged at one end of the evaporator 4, an outlet header 42 is arranged at the other end of the evaporator, the inlet header 41 is connected with the outlet header 42 through a heating surface tube bundle 45, two end parts of the heating surface tube bundle 45 are horizontally arranged, and the middle part of the heating surface tube bundle 45 is obliquely arranged; a shock wave pulse soot blower interface 6 is arranged above the evaporator 4 or the heating surface tube bundle 45 of the oxygen removal evaporator 5, and the shock wave pulse soot blower interface 6 is connected with the shock wave pulse soot blower 7 through a sealing device 9. The utility model discloses effectively solve the problem of 100 deposition of boiler and soot blowers gas leakage, have stronger hydrologic cycle power, the pipe wall temperature that reduces heating surface tube bank 45 changes greatly and the stress that produces for hydrologic cycle is stable and safe, has satisfied energy saving and emission reduction's needs, has certain economic benefits and social.
As shown in fig. 1 to 4, in the embodiment of the present application, an inclined header type waste heat boiler 100100 includes a boiler 100, the boiler 100 is vertically arranged by a steel frame 8, the steel frame 8 is formed by welding horizontal steel bodies 82 and vertical steel bodies 81 at intervals, the boiler 100 is provided with a flue gas inlet 1, a flue gas outlet 2, an ash bucket 3, a plurality of evaporators 4, a boiler barrel, and an oxygen removal evaporator 5, an inlet header 41 is communicated with a down pipe 43, and an outlet header 42 is communicated with an up pipe 44. Water in the boiler barrel enters the inlet header 41 through the downcomer 43 and then uniformly enters the heating surface tube bundle 45, a water-vapor mixture generated by heat absorption of the water in the heating surface tube bundle 45 enters the outlet header 42, and the outlet header 42 enters the boiler barrel through the riser 44 to generate steam which is separated by water vapor and then sent to a user needing the steam for use. The inlet flue gas volume of the boiler 100 in the embodiment of the application is 120000Nm 3 The temperature of the flue gas at the inlet of the boiler 100 is 100-900 ℃, the temperature of the water supply of the boiler 100 is 152 ℃, and the average temperature of the flue gas discharged from the boiler 100 is 230 ℃. By recycling the waste heat of the flue gas, the requirements of energy conservation and emission reduction are met, and certain economic benefits and social benefits are achievedWill benefit.
Specifically, as shown in fig. 1, 3, and 4, in the embodiment of the present application, an inlet header 41 is disposed at one end of the evaporator 4, an outlet header 42 is disposed at the other end of the evaporator, the inlet header 41 and the outlet header 42 are connected by a heating surface tube bundle 45, two end portions of the heating surface tube bundle 45 are horizontally disposed, a middle portion of the heating surface tube bundle is obliquely disposed, and a horizontal inclination angle of the heating surface tube is 30 ° to 60 °, and preferably 45 ℃. Two ends of the heating surface beam tube are respectively fixedly connected with the transverse steel bodies 82 with different heights. The heating surface tube bundle 45 is composed of a plurality of vent pipes. The inclined arrangement of the heating surface tube bundle 45 not only enables the deposited ash blown off by the shock wave pulse soot blower 7 to drop downwards and reduces the secondary adhesion of the deposited ash to the heating surface tube bundle 45, but also has stronger water circulation power due to the larger inclined angle of the heating surface tube bundle 45, reduces the stress generated by the large temperature change of the tube wall of the heating surface tube bundle 45, and enables the water circulation to be stable and safe.
It should be noted that, as shown in fig. 1 and fig. 2, in the embodiment of the present application, a shock pulse soot blower interface 6 is provided above the heating surface tube bundle 45 of the evaporator 4 or the oxygen removal evaporator 5, the shock pulse soot blower interface 6 is connected with a shock pulse soot blower 7 through a sealing device 9, and the shock pulse soot blower 7 is supported on the main body of the boiler 100 through a steel frame 8 or is fixed on the steel frame 8. The spray pipe of the shock wave pulse soot blower 7 is fixedly arranged on the boiler wall body 101, so that soot deposition on the heating surface tube bundle 45 and the inner wall of the boiler 100 is effectively reduced, soot is blown to the soot hopper 3, and the system waste heat recovery efficiency is improved.
Further, as shown in FIG. 5, in the embodiment of the present application, the sealing device 9 includes a sealing sleeve 91, the sealing sleeve 91 has a hollow structure, and the shock pulse sootblower 7 includes a lance extending through the sealing sleeve 91 and to the inner wall of the boiler 100. Fixed embedding boiler wall body 101 of sealing sleeve 91 one end, the fixed welding of the other end has expansion joint 92 and sealing ring 93, and sealing ring 93 welds in the right side of expansion joint 92, through the setting of expansion joint 92, has effectually offset because of the influence that the thermal expansion brought, has released expansion stress. The sealing ring 93 is fixedly sealed on the outer wall of the spray pipe. The front end of the inner cavity of the sealing sleeve is provided with a guide ring 94, and the guide ring 94 is fixedly sleeved on the outer wall of the spray pipe. Rubber liners 95 are filled between the inner cavity of the sealing sleeve 91 and the outer wall of the lance tube and between the guide ring 94 and the sealing ring 93 to reduce small vibration generated during soot blowing of the lance tube. The shock wave pulse soot blower 7 has the advantages of stability and reliability and capability of remarkably reducing vibration during soot blowing of the shock wave pulse soot blower 7 by arranging the sealing sleeve 91, and further the service life of equipment is prolonged.
The utility model discloses when using, the water in the drum passes through downcomer 43 and gets into import header 41, evenly gets into heating surface tube bank 45 afterwards, and the steam mixture that the water in heating surface tube bank 45 absorbs heat and produces gets into export header 42, and export header 42 gets into the drum through tedge 44, produces steam and sends to the user that needs steam after the steam-water separation and uses. The inclined arrangement of the heating surface tube bundle 45 not only enables the deposited dust blown off by the shock wave pulse soot blower 7 to fall down and reduce the secondary adhesion of the deposited dust to the heating surface tube bundle 45, but also has stronger water circulation power due to the larger inclined angle of the heating surface tube bundle 45, reduces the stress generated by the large temperature change of the tube wall of the heating surface tube bundle 45, and enables the water circulation to be stable and safe. The spray pipe of the shock wave pulse soot blower 7 is fixedly arranged on the boiler wall body 101, so that soot deposition on the heating surface tube bundle 45 and the inner wall of the boiler 100 is effectively reduced, soot is blown to the soot hopper 3, and the system waste heat recovery efficiency is improved. The shock wave pulse soot blower 7 has the advantages of stability and reliability and capability of remarkably reducing vibration during soot blowing of the shock wave pulse soot blower 7 by arranging the sealing sleeve 91, and further the service life of equipment is prolonged.
Since any modifications, equivalents, improvements, etc. made within the spirit and principles of the application may readily occur to those skilled in the art, it is intended to be included within the scope of the claims of this application.
Claims (8)
1. The waste heat boiler with the inclined collecting box comprises a boiler and is characterized in that the boiler is vertically arranged through a steel frame, and is provided with a flue gas inlet, a flue gas outlet, an ash bucket, a plurality of evaporators and an oxygen removal evaporator;
an inlet header is arranged at one end of the evaporator, an outlet header is arranged at the other end of the evaporator, the inlet header is connected with the outlet header through a heating surface tube bundle, two end parts of the heating surface tube bundle are horizontally arranged, and the middle part of the heating surface tube bundle is obliquely arranged;
and a shock wave pulse soot blower interface is arranged above the heating surface tube bundle of the evaporator or the oxygen removal evaporator, the shock wave pulse soot blower interface is connected with the shock wave pulse soot blower through a sealing device, and the shock wave pulse soot blower is supported on the boiler main body through a steel frame or is fixed on the steel frame.
2. The inclined header type waste heat boiler as set forth in claim 1, wherein: the inlet header is communicated with the descending pipe, and the outlet header is communicated with the ascending pipe.
3. The inclined header type waste heat boiler as set forth in claim 1, wherein: the steel frame is formed by welding a horizontal steel body and a vertical steel body at intervals, and two ends of the heating surface beam tube are fixedly connected with the horizontal steel bodies with different heights respectively.
4. The inclined header type waste heat boiler as set forth in claim 1, wherein: the horizontal inclination angle of the heated surface pipe is 30-60 degrees.
5. The inclined header type waste heat boiler as set forth in claim 1, wherein: the sealing device comprises a sealing sleeve which is of a hollow structure, and the shock pulse soot blower comprises a spray pipe which penetrates through the sealing sleeve and extends to the inner wall of the boiler.
6. An inclined header waste heat boiler as set forth in claim 5, wherein: the fixed embedding boiler wall body of sealing sleeve one end, the fixed welding of the other end has expansion joint and sealing ring, the sealing ring fixed seal in the spray tube outer wall.
7. An inclined header waste heat boiler as set forth in claim 5, wherein: the front end of the inner cavity of the sealing sleeve is provided with a guide ring, and the guide ring is fixedly sleeved on the outer wall of the spray pipe.
8. The inclined header type waste heat boiler as set forth in claim 7, wherein: rubber linings are filled between the inner cavity of the sealing sleeve and the outer wall of the spray pipe and between the guide ring and the sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221633837.6U CN218154271U (en) | 2022-06-27 | 2022-06-27 | Waste heat boiler of tilting header |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221633837.6U CN218154271U (en) | 2022-06-27 | 2022-06-27 | Waste heat boiler of tilting header |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218154271U true CN218154271U (en) | 2022-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221633837.6U Active CN218154271U (en) | 2022-06-27 | 2022-06-27 | Waste heat boiler of tilting header |
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|---|---|
| CN (1) | CN218154271U (en) |
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- 2022-06-27 CN CN202221633837.6U patent/CN218154271U/en active Active
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