CN103574569B - cement kiln head waste heat boiler - Google Patents
cement kiln head waste heat boiler Download PDFInfo
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- CN103574569B CN103574569B CN201310517128.0A CN201310517128A CN103574569B CN 103574569 B CN103574569 B CN 103574569B CN 201310517128 A CN201310517128 A CN 201310517128A CN 103574569 B CN103574569 B CN 103574569B
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- boiler
- economizer
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- superheater
- tube
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
Present invention is disclosed a kind of cement kiln head waste heat boiler, the exhaust gas entrance of this boiler is positioned at its top, and waste gas outlet is positioned at its bottom, is provided with superheater, evaporimeter and economizer from top to bottom in described boiler.This boiler heating surface structure is stable, and booster rate is low, long service life, and the thermal efficiency is high.
Description
Technical field
The present invention relates to cement kiln heat recovery technology.
Background technology
Cement kiln heat recovery technology is exactly the grog waste gas design boiler utilizing cement kiln head, arrange boiler heating surface, recycle the heat in grog waste gas, this technology needs to carry out reasonable Arrangement to boiler heating surface, the heat exchange efficiency of boiler can be improved like this, reduce heating surface wear, improve boiler service life, reduce costs, and the reliable needs with meeting user of boiler operatiopn can be ensured.Also there is heating surface and arrange defect in the boiler being at present, still needs to improve boiler hot utilization rate by improving.
Summary of the invention
Technical problem to be solved by this invention realizes a kind of heat exchange efficiency improving existing boiler heating surface, reduces heating surface wear, improves boiler service life, reduce costs, to ensure the reliable of boiler operatiopn and to meet the needs of user.
To achieve these goals, the technical solution used in the present invention is: a kind of cement kiln head waste heat boiler, and the exhaust gas entrance of this boiler is positioned at its top, and waste gas outlet is positioned at its bottom, is provided with superheater, evaporimeter and economizer from top to bottom in described boiler.
Described superheater, evaporimeter and economizer inside are respectively equipped with superheater tube bank, evaporator tube row and economizer hand, and described pipe row is all fixed in frame structure, and frame structure peripheral hardware has the detachable panel for transporting protection.
Described economizer hand arrival end is provided with water inlet pipe, described water inlet pipe is provided with water pump, economizer tube outlet connects evaporator tube row by pipeline through drum, described evaporator tube outlet connects superheater tube bank by pipeline through drum, and described superheater tube outlet is connected with steam turbine by pipeline.
Boiler side walls is all located in described superheater tube bank, evaporator tube row and economizer hand gateway, and pipe row of horizontal is placed in boiler.
Described evaporator tube row porch height is lower than its exit height.
Interlaced arrangement between described every layer, evaporimeter pipe row.
Described pipe row is spiral finned tube, and described superheater tube bank specification is Φ 51x3.5, and fin pitch is 6.25mm, be highly 24mm, thickness is 1.2mm, and the specification of evaporator tube row and economizer hand is Φ 38x3.5, fin pitch is 6.25mm, is highly 21mm, and thickness is 1.2mm.
Described boiler wall skin is light-duty backplate furnace wall, and internal layer heat-insulation layer adopts aluminosilicate fiberboard, and thickness is 150-170mm.
The deflector arranged along exhaust gas flow direction is provided with in described frame structure.
The invention has the advantages that this boiler heating surface structure is stable, booster rate is low, long service life, and the thermal efficiency is high.
Accompanying drawing explanation
Mark in the content expressed every width accompanying drawing in description of the present invention below and figure is briefly described:
Fig. 1 is cement kiln production line kiln hood waste heat boiler structural representation;
Fig. 2 is cement kiln production line kiln hood waste heat boiler structure side view;
Mark in above-mentioned figure is: 1, superheater; 2, evaporimeter; 3, economizer;
In Fig. 1, arrow A is exhaust gas entrance; Arrow B is waste gas outlet.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is as the effect of the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part and operation principle, manufacturing process and operation using method etc., be described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.
See Fig. 1,2 known, cement kiln head waste heat boiler adopts vertical structure, the exhaust gas entrance of boiler is positioned at its top, waste gas outlet is positioned at its bottom, flue gas flow rate is lower than 5m/s, and flue gas flow direction as shown by the arrows in Figure 1, is provided with superheater 1, evaporimeter 2 and economizer 3 from top to bottom in boiler, such structure makes boiler floor space reduce, flow of flue gas evenly.
Superheater 1, evaporimeter 2 and economizer 3 inside are respectively equipped with superheater tube bank, evaporator tube row and economizer hand, owing to adopting vertical structure, pipe is discharged entrance and is all located at boiler side walls, pipe row of horizontal is placed in boiler, such water-cycling mode is Natural Circulation, and reliability is strong, good stability, convenient operating maintenance, and the investment, the expense such as operation and maintenance that eliminate the circulating pump of forced circulation.
Superheater 1 effect is superheated steam saturated vapor being heated as uniform temperature, the superheater 1 of this boiler is arranged in boiler smoke entrance side, horizontally disposed in the boiler the superiors, rely on heat convection draw heat, what the superheater 1 of boiler adopted is spiral finned tube, convection superheater 1 accepts the sweep of gases of higher temperature, and to absorb smoke convection heat, the radiant heat of flue gas is auxiliary.Superheater 1 is primarily of spiral finned tube and two box frame compositions.Superheater tube bank and box frame adopt and are welded to connect.Superheater 1 spiral finned tube number number relevant with steam flow rate, steam flow rate is large, and heat convection is effective, and metal pipe can be cooled preferably, but steam drop increases; Tube wall cooling is also relevant with vapour density, and density is large, good cooling results, but drag losses is large.
The effect of evaporimeter 2 relies on the used heat of flowing and the heat exchange of evaporating heating surface in stove, makes the saturation water in evaporimeter, flash to saturated vapor.What adopt due to this boiler is convection current evaporating heating surface, so the evaporimeter 2 in boiler is made up of convection bank, it is also spiral finned tube that the evaporimeter of boiler adopts.Evaporimeter 2 pipe row porch height, lower than its exit height, ensures that it is inclined upwardly along medium.Evaporimeter 2 heat-transfer surface is staggered, and effectively changes the flow direction of waste gas, increases the time that waste gas stops at boiler internal, increases the heat exchange efficiency of boiler.
The effect of economizer 3 is feedwater of heating boiler, improves the water temperature entering drum.The horizontally disposed bottom at boiler vertical gas pass of economizer 3 of this boiler, relies on heat convection draw heat, and what the economizer 3 of boiler adopted is spiral finned tube.Convection type economizer formed primarily of framework and spiral finned tube.Flue gas exhaust gas temperature after economizer 3 is down to less than 100 DEG C, improves boiler efficiency, and can reduce the thermal stress of the drum wall caused because of the temperature difference, extends the service life of drum.
Flue gas passes through superheater 1, evaporimeter and the economizer 3 in boiler.Between superheater 1, evaporimeter and economizer 3, annexation is as follows: water enters this boiler economizer 3 by boiler feed pump booster and heats, after economizer 3, water is heated to 167 DEG C by 50-60 DEG C, moisture after heating delivers to drum, enter the water of drum, the evaporimeter 2 of boiler is introduced by the pipeline bottom drum, the saturated vapor evaporated enters the drum of boiler again, sends into the superheated steam that superheater 1 is heated as 360 DEG C further and enter steam turbine acting after carbonated drink is separated.
Because the pipe row of superheater 1, evaporimeter 2 and economizer 3 all adopts the spiral finned tube with high extended surface, can obtain best heat-transfer effect and minimum flue gas resistance, make boiler structure compact, volume is little, lightweight, saves investment of equipment.In addition, adopt spiral finned tube also can reduce boiler smoke collateral resistance, the electrical power of system air-introduced machine is reduced, thus reduce the operating cost of boiler.Wherein pipe row preferred size is as follows: superheater tube bank specification is Φ 51x3.5, fin pitch is 6.25mm, be highly 24mm, thickness is 1.2mm, and the specification of evaporator tube row and economizer hand is Φ 38x3.5, fin pitch is 6.25mm, be highly 21mm, thickness is 1.2mm, and size is put in the best pipe arrangement that such dimensional structure is through experiment acquisition, heat exchange can be carried out the most efficiently, can the degree of wear be reduced simultaneously.
Conveniently transport and equipment are installed, all pipe rows are all fixed in frame structure, and frame structure peripheral hardware has the detachable panel for transporting protection, load onto panel in transport, container form, when being arranged in boiler, only need to remove panel, only retain framework stationary pipes to arrange, such superheater tube bank, after evaporator tube row and economizer hand can weld in factory, rear shipping has been assembled with bobbin carriage, Site Welding, said structure makes boiler each several part weight can pass to pipe row's framework (steelframe) simultaneously, framework Vertical Uniform is stressed, structure is simple.And boiler evaporating heating surface adopts many headers lantern tubular construction, effectively solve tube bundle heat expansion issues.
Due to inevitable larger containing particle in flue gas, the ash that hardness is higher.For preventing the generation of wearing and tearing, adopt rational flow velocity to design, be provided with the deflector arranged along exhaust gas flow direction in pipe row frame structure, organize smoke power field, make flow of flue gas even, avoid occurring smoke corridor and the heat transfer efficiency reduction caused and wearing and tearing of locally overrunning.
This boiler heating surface adopts box type structure, can ensure boiler seal function admirable.Boiler entirety adopts the full welded seal of steel plate, skin is light-duty backplate furnace wall, internal layer heat-insulation layer adopts aluminosilicate fiberboard, thickness is 150-170mm, and adopt special pipe wall-through sealing device and special furnace door gear, thus solve in boiler operatiopn a serious difficult problem of leaking out, reduce Air Leakage Into Boilers and heat loss, improve the efficiency of boiler, reduce the power consumption of air-introduced machine simultaneously.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (3)
1. cement kiln head waste heat boiler, is characterized in that: the exhaust gas entrance of this boiler is positioned at its top, and waste gas outlet is positioned at its bottom, is provided with superheater, evaporimeter and economizer from top to bottom in described boiler;
Described superheater, evaporimeter and economizer inside are respectively equipped with superheater tube bank, evaporator tube row and economizer hand, and described pipe row is all fixed in frame structure, and frame structure peripheral hardware has the detachable panel for transporting protection;
Described evaporator tube row porch height is lower than its exit height;
The deflector arranged along exhaust gas flow direction is provided with in described frame structure;
Interlaced arrangement between described every layer, evaporimeter pipe row;
Described pipe row is spiral finned tube, and described superheater tube bank specification is Φ 51x3.5, and fin pitch is 6.25mm, be highly 24mm, thickness is 1.2mm, and the specification of evaporator tube row and economizer hand is Φ 38x3.5, fin pitch is 6.25mm, is highly 21mm, and thickness is 1.2mm;
Described boiler wall skin is light-duty backplate furnace wall, and internal layer heat-insulation layer adopts aluminosilicate fiberboard, and thickness is 150-170mm.
2. cement kiln head waste heat boiler according to claim 1, it is characterized in that: described economizer hand arrival end is provided with water inlet pipe, described water inlet pipe is provided with water pump, economizer tube outlet connects evaporator tube row by pipeline through drum, described evaporator tube outlet connects hot organ pipe row by pipeline through drum, and described superheater tube outlet is connected with steam turbine by pipeline.
3. cement kiln head waste heat boiler according to claim 1 and 2, is characterized in that: boiler side walls is all located in described superheater tube bank, evaporator tube row and economizer hand gateway, and pipe row of horizontal is placed in boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310517128.0A CN103574569B (en) | 2013-10-26 | 2013-10-26 | cement kiln head waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310517128.0A CN103574569B (en) | 2013-10-26 | 2013-10-26 | cement kiln head waste heat boiler |
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| Publication Number | Publication Date |
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| CN103574569A CN103574569A (en) | 2014-02-12 |
| CN103574569B true CN103574569B (en) | 2016-04-13 |
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| CN201310517128.0A Active CN103574569B (en) | 2013-10-26 | 2013-10-26 | cement kiln head waste heat boiler |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322341A (en) * | 2016-10-10 | 2017-01-11 | 无锡华光锅炉股份有限公司 | Building structure merged in vertical waste heat boiler |
| CN107654985A (en) * | 2017-10-17 | 2018-02-02 | 安徽海螺川崎节能设备制造有限公司 | A kind of new cement kiln tail waste heat boiler |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH074602A (en) * | 1993-06-14 | 1995-01-10 | Mitsubishi Heavy Ind Ltd | Waste heat boiler |
| CN201028471Y (en) * | 2007-03-20 | 2008-02-27 | 盐城市锅炉制造有限公司 | Low-temperature waste-gas exhaust-heat boiler of sintering cooler |
| CN101793467A (en) * | 2010-02-10 | 2010-08-04 | 洛阳水泥工程设计研究院有限公司 | Pure medium-low temperature waste heat generating system in cement kiln |
| CN201599786U (en) * | 2010-01-14 | 2010-10-06 | 中国石油化工集团公司 | Modular structure of heating surface of exhaust-heat boiler in convection segment of heating furnace |
| CN103170230A (en) * | 2013-03-01 | 2013-06-26 | 大连易世达新能源发展股份有限公司 | Selective non-catalytic reduction reaction denitration system for cement kiln |
-
2013
- 2013-10-26 CN CN201310517128.0A patent/CN103574569B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH074602A (en) * | 1993-06-14 | 1995-01-10 | Mitsubishi Heavy Ind Ltd | Waste heat boiler |
| CN201028471Y (en) * | 2007-03-20 | 2008-02-27 | 盐城市锅炉制造有限公司 | Low-temperature waste-gas exhaust-heat boiler of sintering cooler |
| CN201599786U (en) * | 2010-01-14 | 2010-10-06 | 中国石油化工集团公司 | Modular structure of heating surface of exhaust-heat boiler in convection segment of heating furnace |
| CN101793467A (en) * | 2010-02-10 | 2010-08-04 | 洛阳水泥工程设计研究院有限公司 | Pure medium-low temperature waste heat generating system in cement kiln |
| CN103170230A (en) * | 2013-03-01 | 2013-06-26 | 大连易世达新能源发展股份有限公司 | Selective non-catalytic reduction reaction denitration system for cement kiln |
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| CN103574569A (en) | 2014-02-12 |
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