CN201028471Y - Low-temperature waste-gas exhaust-heat boiler of sintering cooler - Google Patents
Low-temperature waste-gas exhaust-heat boiler of sintering cooler Download PDFInfo
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- CN201028471Y CN201028471Y CNU2007200351728U CN200720035172U CN201028471Y CN 201028471 Y CN201028471 Y CN 201028471Y CN U2007200351728 U CNU2007200351728 U CN U2007200351728U CN 200720035172 U CN200720035172 U CN 200720035172U CN 201028471 Y CN201028471 Y CN 201028471Y
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Abstract
The utility model provides a waste heat boiler with low energy consumption, small bulk, not easy ash collecting and wear-resisting, which can effectively use the low temperature to heating and generate electricity. The entire of the waste heat boiler uses vertical type arrangement and header type structure; the boiler header is arranged inside a superheater, an evaporating area, a low pressure evaporating area, a coal economizer and a low voltage coal economizer, wherein, the evaporating area and the low pressure evaporating area are provided with a plurality groups of evaporators, the evaporators are obliquely arranged inside the flues, the slope angle is 5 DEG to 15 DEG; the evaporators are the lantern tube structures; the evaporators are arranged above an upper header, a lower header and the convection tubes; the upper header and the lower header are connected by the staggered convection tubes consists of vertical helix finned tubes. the evaporators have separate declining tubes and stream water inducing pipe. The evaporator in the evaporating area is connected to the stream drum by the declining tube and the stream water inducing pipe, and the evaporator in low pressure evaporating area is connected to the low pressure stream drum by the declining tube and the stream water inducing pipe; the surface of the boiler being heated is provided with a helix finned tubes.
Description
One, technical field
The invention belongs to a kind of boiler plant, particularly a kind of sinter cooler low temperature waste gas residual heat boiler.
Two, background technology
Prior art: " state key industry clearer production technology guiding catalogue " state's economy and trade resource [2000] No. 137 (first) and State Economic and Trade Commission unite bulletin [2003] No. 21 (second batches) with State Environmental Protection Administration and have issued 28 clearer production technologies directly related with steel industry.From coking, ironmaking, steel-making, steel rolling production technology, choose and best embody integrated iron and steel works' cleaner production achievement, reflection steel industry " energy-conservation ", " subtracting dirt ", the most representative index, sintering waste heat reclaims and just is decided to be wherein one.Sintering circuit is that iron and steel enterprise produces the power consumption major part in the circulation, its energy consumption is only second to the ironmaking operation, account for 10% of steel industry total energy consumption, and nearly 50% energy consumption is arranged in the sintering circuit total energy consumption all is that sensible heat form with sintering device flue gas and cooling machine waste gas enters atmosphere, has not only wasted heat energy but also contaminated environment.Because the sintered discharge gas temperature is not high, iron and steel enterprise paid attention to inadequately the recycling of this part heat energy in the past, but in fact because the amount of sintered discharge gas is very big, thereby can be also considerable for the heat that reclaims.Utilize low-temperature flue gas to produce the superheated steam steam supply turbine generating of low parameter, can reduce the production cost of iron and steel enterprise greatly, produce remarkable economic efficiency and environment protecting.Therefore sintered discharge gas generating prospect is well worth doing.
Sinter cooler discharges a large amount of low-temperature heat sources in running, if pass through to existing smelter sintering plant sintering cooling device, as cool off the car cover, the ore bucket that falls, cooling blower carries out suitable transformation that the low temperature heatrejection is brought up to about 380 ℃, produce 1.25～2.45MPa, 290～330 ℃ of superheated steams by waste heat boiler, for sintering machine cogeneration provides precondition.
The low temperature exhaust heat of present domestic sinter cooler is mainly used in: 1, draw the sub-fraction hot waste gas and be used for combustion-supporting to igniter; 2, utilize heat pipe jacket type waste heat boiler to produce the following saturated vapor of 1.0Mpa.Exhaust gas temperature is more than 200 ℃, and the waste gas heat utilization rate is low, and a large scale sintering cooler need be arranged many cover low capacity heat pipe waste heat boiler operations, maintenance management inconvenience.These two kinds of methods all can not fundamentally solve the high problem of sintering machine energy consumption.
Three, summary of the invention
The present invention is directed to above-mentioned technical problem, provide that a kind of energy consumption is low, volume is little, be difficult for dust stratification, wear-resistant, good seal performance and can effectively utilize the waste heat boiler of cryogenic heat transfer generating.
Technical solution of the present invention is: a kind of sinter cooler low temperature waste gas residual heat boiler, comprise superheater, evaporating area, low pressure evaporating area, economizer and low-pressure coal saver, be provided with between the equipment and be communicated with flue and vapour pipe, it is characterized in that whole vertical layout, the box type structure of adopting of waste heat boiler, from top to bottom be provided with superheater, evaporating area, low pressure evaporating area, economizer and low-pressure coal saver in the boiler bobbin carriage successively, wherein evaporating area, low pressure evaporating area are provided with many group evaporimeters, evaporimeter tilts to be placed in the flue, and the angle of inclination is 5 °～15 °; Evaporimeter is the lantern tubular construction, described evaporimeter is provided with upper collecting chamber, next part case and convection bank, form the convection bank connection of stagger arrangement between the upper and lower collection case by vertical multi-detector finned tube, each evaporimeter has independently down-comer, carbonated drink fairlead, wherein the evaporimeter of evaporating area is connected with drum by down-comer, carbonated drink fairlead, and the evaporimeter of low pressure evaporating area is connected with low-pressure drum by down-comer, carbonated drink fairlead.Channel structure surrounds the casing that opens wide up and down for around being made of steel plate and shaped steel, and the box inside plate installs expansion joint additional, and the outer insulation construction surface of casing is provided with outer casing.The smoke entrance zone of flue is provided with the round steel that two misarrangements row are arranged.Low-pressure coal saver is the wrong spiral finned tube of arranging and putting.
Enter from the boiler top at high-temperature flue gas and to pass through steam water interface that superheater, evaporating area (low pressure evaporating area), soft water heater (low pressure soft water heater) evaporating area (low pressure evaporating area) produced successively and be pooled to upper collecting chamber and enter the waste heat boiler drum by fairlead, the water supply of evaporator section is fitted on next part case by down-comer with saturation moisture by drum, constitutes reliable water-flow circuit.Soft water enters the waste heat boiler drum after heating through soft water heater (low pressure soft water heater).
Heating surface adopts the spiral finned tube with height extended surface, and ratio-frequency welding is adopted in extended surface tube and pipe welding, and fitting between extended surface tube and the pipe does not have the gap fully, eliminates heat transfer resistance; Superheater, economizer adopt the coiled pipe structure, two ends free wxpansion when being heated, and pipe is indeformable; Evaporator section is designed to lantern pipe (going up next part case and convection bank) structure, and the steam-generating bank two ends are free end when being heated, the free wxpansion of being heated.
Boiler each several part heating surface is arranged in by surrounding all around in the casing that opens wide up and down that steel plate and shaped steel are made; The box inside plate installs expansion joint additional, eliminates swelling stress; Different mining according to the heating surface arrangement in the casing is hung structure with different propping up; Directly lift bobbin carriage during installation, bobbin carriage is delivered to own wt on the crossbeam of steelframe by bottom shaped steel; Adopt the box type structure boiler can be leaked out to reduce to minimum, reduce the boiler heat loss of leaking out, improve boiler efficiency; Boiler adopts the outer insulation construction of casing.Installing outer casing in insulation outside is protected insulation material outside, and radiation loss is no more than 4%.
Evaporator section is designed to lantern pipe (going up next part case and convection bank) structure and it is characterized in that: between each upper and lower collection case, be made of the convection bank of stagger arrangement the finned tubes of vertically arranging more; Each evaporimeter has independently that down-comer, carbonated drink fairlead link to each other with drum, forms simple Natural Circulation pipeline; Tube bank adopts wrong row to wash away fully, and heating surface is dust stratification not.
Heating surface adopts wrong row's mode, and whole heating surface adopts the mistake mode of putting of arranging, and makes whole heating surface wash away fully the heat transfer coefficient height; Boiler heating surface is based on horizontally disposed vertical structure in addition, and heating surface is difficult for dust stratification.
Heating surface adopts unique mode to avoid wearing and tearing, adopts rational flue gas flow rate, to alleviate uniform wear.Because wearing and tearing are proportional with 3 powers of flue gas flow rate, so whole boiler adopts low flow velocity design, peak flow rate (PFR) is no more than 7.0m/s to reduce uniform wear; Rationalization the smoke power field, make flow of flue gas even, can avoid the flue gas corridor occurring and cause heat transfer efficiency to reduce and the part wearing and tearing of overrunning; At flue surface zone easy to wear (superheater gas approach) round steel that two misarrangements row arrange is set and avoids dust granule, eliminate the kinetic energy of dust granule, alleviate concentrated wear directly the washing away of heating surface tube; The whole heating surface pipe of boiler adopts the life-span of thick-walled pipe with the prolonged boiler heating surface; Whole heating surface adopts the helix fin tubular construction, and pipe is had the certain protection effect.
At boiler tail the low-temp low-pressure economizer is set, the low-temp low-pressure economizer adopts the wrong helix fin tubular construction of arranging and putting, and it is used for adding the heat generating system make-up water, enters oxygen-eliminating device after the make-up water heating; Because deoxygenation is not passed through in feedwater, tubing should be selected the material of oxytolerant corrosion such as cast iron pipe etc.
The present invention produces following beneficial effect:
1, boiler adopts to concentrate and reclaims the sinter cooler waste heat, and promptly every cover agglomerating plant is only joined a cover afterheat boiler system;
2, waste heat boiler adopts vertical layout, and flue gas enters from the boiler top and passes through successively to discharge from the bottom behind superheater, evaporating area, economizer (soft water heater) and the low-pressure coal saver, makes things convenient for the boiler ash discharge again when saving the occupation of land space;
3, boiler evaporative section is made up of many groups evaporimeter, and evaporimeter tilts and to be placed in the flue, with horizontal sextant angle at 5 °～15 °; Evaporimeter adopts goes up next part case combined (lantern tubular construction) structure, between each upper and lower collection case, is made of the convection bank of stagger arrangement the finned tubes of vertically arranging more; Each evaporimeter has independently that down-comer, carbonated drink fairlead link to each other with drum, forms simple and reliable Natural Circulation pipeline; Tube bank adopts wrong row to wash away fully, and heating surface is dust stratification not;
4, the whole box type structure that adopts of boiler has superheater bobbin carriage, evaporimeter bobbin carriage and economizer bobbin carriage from top to bottom.Bobbin carriage is delivered to own wt on the crossbeam of steelframe by bottom shaped steel.Adopt the box type structure boiler can be leaked out to reduce to minimum, reduce the boiler heat loss of leaking out, reduced the power consumption of air-introduced machine when improving boiler efficiency;
5, boiler adopts the outer insulation construction of casing.At heat-insulation layer outside installing outer casing, insulation material to be protected, radiation loss is few;
6, heating surface adopts the spiral finned tube with high extended surface to obtain best heat-transfer effect and minimum flue gas resistance, makes boiler structure become very compact, and volume is little, and is in light weight, saves the boiler initial cost;
7, boiler tubes is horizontally disposed, and flue dust is difficult for amassing on fin; The tubule footpath heating surface that boiler adopts, under same flue gas flow rate, resistance is less; Adopt the fin pitch big (t 〉=6.25) of finned tube, help deashing.
8, the boiler water cycle mode is a Natural Circulation.Natural cycle system has good reliability, good stability, and advantages such as convenient operating maintenance, and saved the expenses such as investment, operation and maintenance of the circulating pump of forced circulation;
9, the Boiler Steam system can be designed to single pressing system, single pressure zone flash distillation single-stage filling system and dual pressure system according to the actual conditions of sinter cooler and steam turbine, makes system's generating capacity reach optimization so as far as possible.
10, the solution of wear problem:
Because the factor of influence wearing and tearing is main relevant with situations such as flue gas condition, smoke property and heating surface materials, so under the certain situation of smoke property and heating surface material, take following measure to prevent boiler abrasion:
10.1 adopt rational flue gas flow rate, to alleviate uniform wear.Because wearing and tearing are proportional with 3 powers of flue gas flow rate, so whole boiler adopts low flow velocity design, peak flow rate (PFR) is no more than 7.0m/s to reduce uniform wear;
10.2 rationalization the smoke power field, make flow of flue gas even, can avoid the flue gas corridor occurring and cause heat transfer efficiency to reduce and the part wearing and tearing of overrunning;
Avoid dust granule to directly the washing away of heating surface tube 10.3 two row's round steel are set, alleviate concentrated wear at flue surface zone easy to wear (superheater gas approach);
10.4 the whole heating surface pipe of boiler adopts the life-span of thick-walled pipe with the prolonged boiler heating surface;
10.5 whole heating surface adopts the helix fin tubular construction, and pipe is had the certain protection effect.
11, thermal expansion solution:
11.1 superheater, economizer adopt the coiled pipe structure, two ends free wxpansion, and pipe is indeformable;
11.2 the steam-generating bank two ends are free end, the free wxpansion of being heated;
Install expansion joint additional 11.3 interior side guard plate adopts, eliminate swelling stress.
Four, description of drawings
Fig. 1 is of the present utility model couple of Hair Fixer electric system figure;
Fig. 2 is boiler evaporative section bobbin carriage figure of the present utility model;
Fig. 3 is a boiler structure schematic diagram of the present utility model;
(1) superheater (2) evaporating area (3) soft water heater (economizer) (4) low pressure evaporating area (5) low pressure soft water heater (low-pressure coal saver) (6) drum (7) low-pressure drum (8) upper collecting chamber (9) bobbin carriage (10) spiral fin coil (11) device for hoisting (12) next part case (13) gas approach (14) steam turbine (15) generator (16) oxygen-eliminating device (17) condenser (18) condensate pump (19) low-temp low-pressure economizer (20) feed pump among the figure
Five, the specific embodiment
Embodiment 1:
Dual pressure system: the two single-stage filling systems that press that adopt steam compensating turbine, waste heat boiler is provided with superheater 1, evaporating area 2, low pressure evaporating area 4, soft water heater (economizer) 3, low pressure soft water heater (low-pressure coal saver) 5, and flue gas is from top to bottom by superheater 1, evaporating area 2, low pressure evaporating area 4, soft water heater (economizer) 3, low pressure soft water heater (low-pressure coal saver) 5.The steam of two kinds of different parameters of sintering waste heat boiler for producing, one is main steam, another is the low pressure filling.Since be provided with the low pressure evaporator section, low-pressure steam pressure: 0.55MPa, 162 ℃ of low-pressure steam saturation temperatures, exhaust gas temperature can drop to about 110 ℃.
Embodiment 2:
In Fig. 2, the steam water interface that evaporating area 2 is produced is pooled to upper collecting chamber 8 and enters waste heat boiler drum 6 by fairlead, and the water supply of evaporating area 2 is fitted on next part case 12 by down-comer with saturation moisture by drum 6, constitutes reliable water-flow circuit like this.Drum 6 separates steam water interface, and saturated vapor enters superheater 1 and is heated to form superheated steam.Economizer 3,5 heating surfaces adopt spiral fin coil 10 structures, and feedwater enters drum 6,7 after heating.
In Fig. 3, evaporator section 2 is designed to the lantern tubular construction, promptly goes up next part case 8,12 and convection bank 10 structures.
Embodiment 3:
A kind of sinter cooler low temperature waste gas residual heat boiler, comprise superheater, evaporating area, low pressure evaporating area, economizer and low-pressure coal saver, be provided with between the equipment and be communicated with flue and vapour pipe, whole vertical layout, the box type structure of adopting of waste heat boiler, from top to bottom be provided with superheater 1, evaporating area 2, low pressure evaporating area 4, economizer 3 and low-pressure coal saver 5 in the boiler bobbin carriage successively, wherein evaporating area, low pressure evaporating area are provided with many group evaporimeters, evaporimeter tilts to be placed in the flue, and the angle of inclination is 5 °～15 °; Evaporimeter is the lantern tubular construction, described evaporimeter is provided with upper collecting chamber, next part case and convection bank, form the convection bank connection of stagger arrangement between the upper and lower collection case by vertical multi-detector finned tube, each evaporimeter has independently down-comer, carbonated drink fairlead, wherein the evaporimeter of evaporating area is connected with drum by down-comer, carbonated drink fairlead, and the evaporimeter of low pressure evaporating area is connected with low-pressure drum by down-comer, carbonated drink fairlead.Channel structure surrounds the casing that opens wide up and down for around being made of steel plate and shaped steel, and the box inside plate installs expansion joint additional, and the outer insulation construction surface of casing is provided with outer casing.The smoke entrance zone of flue is provided with the round steel that two misarrangements row are arranged.The low-temp low-pressure economizer is the wrong spiral finned tube of arranging and putting.
Embodiment 4:
A kind of sinter cooler low temperature waste gas residual heat boiler electricity generation system, flue gas are successively by superheater-main evaporator-low pressure evaporator-main economizer-low-pressure coal saver-low-temp low-pressure economizer-air-introduced machine-chimney; The main steam that waste heat boiler produces enters steam turbine 14 main air intakes, low-pressure saturated steam admission turbine 14 filling mouths, steam is sent after doing work in steam turbine and driving generator 15, enter condenser 17, in condenser, be condensed into 37 ℃ water, 37 ℃ water is delivered to low-temp low-pressure economizer 19 together by water pump 18 and system's make-up water and is heated, be heated to 50 ℃～60 ℃ hot water, hot water is delivered to oxygen-eliminating device 16 and is carried out deoxygenation, deaerated water is delivered to boiler by boiler feed pump 20, has so just finished vapour-water circulation.
Claims (4)
1. sinter cooler low temperature waste gas residual heat boiler, comprise superheater (1), evaporating area (2), low pressure evaporating area (4), economizer (3) and low-pressure coal saver (5), be provided with between the equipment and be communicated with flue and vapour pipe, it is characterized in that the vertical layout of the whole employing of waste heat boiler, the box type structure, from top to bottom be provided with superheater (1) in the boiler bobbin carriage successively, evaporating area (2), low pressure evaporating area (4), economizer (3) and low-pressure coal saver (5), evaporating area (2) wherein, low pressure evaporating area (4) is provided with many group evaporimeters, evaporimeter tilts to be placed in the flue, and the angle of inclination is 5 °～15 °; Evaporimeter is the lantern tubular construction, described evaporimeter is provided with upper collecting chamber (8), next part case (12) and convection bank, form the convection bank connection of stagger arrangement between the upper and lower collection case by longitudinal spiral finned tube (10), evaporimeter has independently down-comer, carbonated drink fairlead, wherein the evaporimeter of evaporating area is connected with drum (6) by down-comer, carbonated drink fairlead, and the evaporimeter of low pressure evaporating area is connected with low-pressure drum (7) by down-comer, carbonated drink fairlead; Boiler heating surface is provided with spiral finned tube.
2. sinter cooler low temperature waste gas residual heat boiler as claimed in claim 1, it is characterized in that described channel structure surrounds the casing that opens wide up and down for around being made of steel plate and shaped steel, the box inside plate installs expansion joint additional, and casing is provided with heat-insulation layer outward, and the heat-insulation layer outer surface is provided with outer casing.
3. sinter cooler low temperature waste gas residual heat boiler as claimed in claim 1 is characterized in that the smoke entrance zone of described flue is provided with the round steel that two misarrangements row are arranged.
4. sinter cooler low temperature waste gas residual heat boiler as claimed in claim 1 is characterized in that described superheater, economizer and low-pressure coal saver adopt coiled pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200351728U CN201028471Y (en) | 2007-03-20 | 2007-03-20 | Low-temperature waste-gas exhaust-heat boiler of sintering cooler |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007200351728U CN201028471Y (en) | 2007-03-20 | 2007-03-20 | Low-temperature waste-gas exhaust-heat boiler of sintering cooler |
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| CN201028471Y true CN201028471Y (en) | 2008-02-27 |
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| CNU2007200351728U Expired - Lifetime CN201028471Y (en) | 2007-03-20 | 2007-03-20 | Low-temperature waste-gas exhaust-heat boiler of sintering cooler |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798942A (en) * | 2010-04-08 | 2010-08-11 | 天津港(集团)有限公司 | System for recycling waste heat |
| CN101344359B (en) * | 2008-08-20 | 2011-04-20 | 首钢总公司 | Sintered ring cold exhaust heat stepped recovery power generation system and technique |
| CN102042581A (en) * | 2011-01-21 | 2011-05-04 | 上海康洪精密机械有限公司 | System for generating low-pressure steam by utilizing flue gas waste heat |
| CN101706215B (en) * | 2009-05-07 | 2011-07-20 | 河北理工大学 | Method and device for double-source power cogeneration with sintering waste heat |
| CN102359400A (en) * | 2011-09-14 | 2012-02-22 | 中冶赛迪工程技术股份有限公司 | Comprehensive utilization system for waste heat steam of steel enterprise |
| CN103574569A (en) * | 2013-10-26 | 2014-02-12 | 安徽海螺川崎节能设备制造有限公司 | Cement kiln head waste heat boiler |
| CN104296544A (en) * | 2014-10-13 | 2015-01-21 | 中信重工机械股份有限公司 | Low-temperature cogeneration flashing system |
| 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 |
| CN112325307A (en) * | 2020-11-17 | 2021-02-05 | 中晟工程技术(天津)有限公司 | Rapid cooler of sintering flue gas incinerator |
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2007
- 2007-03-20 CN CNU2007200351728U patent/CN201028471Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344359B (en) * | 2008-08-20 | 2011-04-20 | 首钢总公司 | Sintered ring cold exhaust heat stepped recovery power generation system and technique |
| CN101706215B (en) * | 2009-05-07 | 2011-07-20 | 河北理工大学 | Method and device for double-source power cogeneration with sintering waste heat |
| CN101798942A (en) * | 2010-04-08 | 2010-08-11 | 天津港(集团)有限公司 | System for recycling waste heat |
| CN102042581A (en) * | 2011-01-21 | 2011-05-04 | 上海康洪精密机械有限公司 | System for generating low-pressure steam by utilizing flue gas waste heat |
| CN102359400A (en) * | 2011-09-14 | 2012-02-22 | 中冶赛迪工程技术股份有限公司 | Comprehensive utilization system for waste heat steam of steel enterprise |
| CN102359400B (en) * | 2011-09-14 | 2014-05-14 | 中冶赛迪工程技术股份有限公司 | Comprehensive utilization system for waste heat steam of steel enterprise |
| CN103574569A (en) * | 2013-10-26 | 2014-02-12 | 安徽海螺川崎节能设备制造有限公司 | Cement kiln head waste heat boiler |
| CN103574569B (en) * | 2013-10-26 | 2016-04-13 | 安徽海螺川崎节能设备制造有限公司 | cement kiln head waste heat boiler |
| CN104296544A (en) * | 2014-10-13 | 2015-01-21 | 中信重工机械股份有限公司 | Low-temperature cogeneration flashing system |
| CN104296544B (en) * | 2014-10-13 | 2016-07-06 | 中信重工机械股份有限公司 | A kind of low-temperature cogeneration flash system |
| 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 |
| CN112325307A (en) * | 2020-11-17 | 2021-02-05 | 中晟工程技术(天津)有限公司 | Rapid cooler of sintering flue gas incinerator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU DONGJIU HEAVY INDUSTRIES CO., LTD. Free format text: FORMER NAME: YANCHENG CITY BOILER MANUFACTURING CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 224005 No. 5, Pioneer Road, Jiangsu, Yancheng City Patentee after: East, Jiangsu nine heavy industry limited companies Address before: 224006 Jiangsu province Yancheng City Xiaohai Road No. 39 Patentee before: Yancheng City Boiler Manufacturing Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20080227 |
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| CX01 | Expiry of patent term |