CN101482261B - Comprehensive utilization apparatus for flue gas exhaust heat - Google Patents
Comprehensive utilization apparatus for flue gas exhaust heat Download PDFInfo
- Publication number
- CN101482261B CN101482261B CN200910036973XA CN200910036973A CN101482261B CN 101482261 B CN101482261 B CN 101482261B CN 200910036973X A CN200910036973X A CN 200910036973XA CN 200910036973 A CN200910036973 A CN 200910036973A CN 101482261 B CN101482261 B CN 101482261B
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- flue gas
- heating surface
- water
- temperature
- flue
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- 239000003546 flue gas Substances 0.000 title claims description 90
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 86
- 238000010438 heat treatment Methods 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000003517 fume Substances 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 12
- 238000009834 vaporization Methods 0.000 claims description 8
- 230000008016 vaporization Effects 0.000 claims description 8
- 230000003750 conditioning effect Effects 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 239000002352 surface water Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000008236 heating water Substances 0.000 abstract 3
- 239000002918 waste heat Substances 0.000 description 15
- 238000011084 recovery Methods 0.000 description 7
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010960 commercial process Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The invention provides a comprehensive utilization device for smoke gas exhaust heat, comprising a steam dome, a flue-type furnace and a flue-type exhaust heat boiler which is arranged in the flue-type furnace and formed by a heating surface of vapouring water and a heating surface of heating water; at least two smoke gas take-away devices are additionally arranged in the furnace, one is arrangedbetween the heating surface of vapouring water and the heating surface of heating water to form a low-temperature smoke gas take-away device and the other is inserted in the middle of the heating surface of vapouring water to form a high-temperature smoke gas take-away device; the delivery outlets of the two smoke gas take-away devices are combined to a smoke gas delivery outlet by a smoke gas adjusting device and the smoke gas delivery outlet is connected with a draught fan and delivers hot smoke gas outwards. The comprehensive utilization device for smoke gas exhaust heat can not only heat water to generate steam by the heating surface of vapouring water and the heating surface of heating water, but also deliver hot smoke gas with controllable flow and temperature by the low-temperaturesmoke gas take-away device and the high-temperature smoke gas take-away device for manufacturing technique, thereby remarkably improving the utilization ratio of the smoke gas exhaust heat.
Description
Technical field
The invention belongs to the industrial afterheat recovery apparatus field, specifically relate to improvement the waste heat boiler technology.
Background technology
The form of industrial exhaust heat Chang Yire flue gas occurs, and common this fume afterheat is used to produce steam.In waste heat boiler, carrying out the exothermic process of flue gas and the heat absorption vaporescence of water, heat is transferred to the water from flue gas.The transfer of heat is accompanied by the increase of entropy, causes the quality of heat energy to descend.It is little that desirable waste heat boiler should make that the increase of entropy is tried one's best.The exothermic process of flue gas is the cooling procedure of gas, and the temperature curve of its heat release is a dull curve that descends.The process of water heat absorption generation steam is one and relates to the process that thing changes mutually that its temperature curve is a broken line.The The initial segment of this broken line is the dull straight line that rises, and represents the intensification of water, and this broken line transfers horizontal line to after the temperature that reaches capacity, and represents the isothermal vaporescence of saturation water.Flue gas heat release and water heat up and have occurred " turning point " of a heat transfer temperature difference minimum between these two temperature curves of vaporization, depart from this " turning point ", and heat transfer temperature difference all is dull increases.Heat transfer temperature difference is big more, and the entropy increase is many more.Therefore, the UTILIZATION OF VESIDUAL HEAT IN method of this simple generation steam has high entropy and increases, i.e. the bigger speciality of heat grade decline.In addition, because flue gas exothermic temperature curve and water heat absorption vapourizing temperature curve do not match, cause the waste heat recovery rate low.Centering low-temperature flue gas (such as about 380 ℃) particularly, if only be used for producing the saturated vapor of 2.5 MPa, then waste heat recovery rate has only 52%.
For comparing clean flue gas or hot-air, then also there is a kind of method of UTILIZATION OF VESIDUAL HEAT IN more efficiently, just except producing steam, suitably extract in the part, the low temperature clean flue gas is used for drying or insulation, then can make system's entropy increase and decrease few, and can greatly improve the afterheat utilization rate.
Summary of the invention
The objective of the invention is for solving a kind of fume afterheat comprehensive utilization device that above-mentioned reality technology problem proposes.This device can also produce the hot flue gas that temperature and flow can be regulated as required simultaneously except can producing steam, thereby overcomes the conventional low drawback of fume afterheat utilization rate.
For achieving the above object, the designed fume afterheat comprehensive utilization device of the present invention is to improve on the basis of common flue type residual heat boiler structure, heat in the waste heat boiler of heating surface at the water vapor heating surface and the water that include drum, chimney flue type burner hearth and be arranged in the chimney flue type burner hearth, the flue gas ejector has been set up in the appropriate location in the chimney flue type burner hearth.Described flue gas ejector is divided into two at least, one between water vapor heating surface and water heating heating surface, form the low-temperature flue gas ejector; Another is located in the middle of the water vapor heating surface, forms the high-temperature flue gas ejector, and the delivery outlet of two flue gas ejectors is behind flue gas conditioning device and be combined into a flue gas delivery outlet, is connected with air-introduced machine, outwards the heat outputting flue gas.Like this, fume afterheat comprehensive utilization device of the present invention can heat generation steam to water by water vapor heating surface and water heating heating surface on the one hand, the high and low temperature flue gas that can extract out in the burner hearth by the flue gas ejector on the other hand, through flue gas conditioning device, produce flow and all controlled hot flue gas of temperature.
In the present invention, control the low-temperature flue gas of output and the ratio of high-temperature flue gas in order to adjusting, thereby reach the hot flue-gas temperature of change output and the purpose of flow by set flue gas conditioning device.
Described flue gas conditioning device can have multiple version, generally can use the flapper valve of two interlocks, a delivery outlet that is contained in the high-temperature flue gas ejector, and another is contained in the delivery outlet of low-temperature flue gas ejector.Open when big when one, another then turns down, and changes the ratio of high-temperature flue gas and low-temperature flue gas flow like this and keeps the flue gas total flow constant as far as possible.Flue gas is extracted total amount out and then can be controlled with the rotating speed that changes air-introduced machine.
Described flue gas ejector can have multiple version.A kind of typical structure is to arrange a circle exhaust gases passes on the section of burner hearth perpendicular to the flow of flue gas direction, around the furnace wall one week, and passage has slit-shaped openings to lead to burner hearth, and opening can be continuous also can being interrupted.Exhaust gases passes has a total delivery outlet to lead to outside the stove.Exhaust gases passes can be designed to the uniform flow variable cross-section, and is big near the sectional area of total equipped at outlet port, reduces gradually towards the far-end sectional area.
The structure of another kind of flue gas ejector can be one group of pipe row of passing through section of burner hearth perpendicular to the flow of flue gas direction, forms on pipe row's the pipe to be laid with air inlet.Air inlet can be any direction, but preferably opens at lee face, and it is principle that the distribution of opening is compared the even velocity field with the flue gas formation of pipe row back.
The technical scheme of fume afterheat comprehensive utilization device proposed by the invention, overcome and improve the existing problem of traditional flue gas UTILIZATION OF VESIDUAL HEAT IN method that only produces steam, just this fume afterheat comprehensive utilization device also produces hot flue gas simultaneously except producing steam.Owing to extract the slope that partial fume can change the exotherm of flue gas, thereby can reduce heat transfer temperature difference between the cigarette G﹠W, significantly reduce the entropy increment of water vapor process by in position extracting flue gas out.Also can improve the heat energy recovery rate of whole fume afterheat comprehensive utilization device simultaneously.Such as, above-mentioned about 380 ℃ flue gas, except the saturated vapor of the 2.5Mpa that is used for producing equal number, if also extract hot flue gas about 220 ℃ simultaneously, then its utilization rate of waste heat can reach more than 73%.
A lot of commercial processes produce a large amount of waste heat flue gases, and need to consume simultaneously steam and hot flue gas.Come to this such as iron ore concentrate sintered production line, use above-mentioned fume afterheat comprehensive utilization device can significantly improve capacity usage ratio this moment.
With following data instance, illustrate and utilize the efficient of the present invention's waste heat recovery afterwards:
Certain production line gives off 400,000 Nm3/h, 380 ℃ of waste heat flue gases when producing, and the saturated vapor that its production technology needs 200,000 Nm3/h, 230 ℃ of hot flue gases, remaining waste heat to be used to produce 2MPa is used for generating.Conventional way is with 120,000 Nm
3/ h, 380 ℃ waste heat flue gas and 80,000 Nm
3/ h air is mixed into 200,000 Nm
3The hot flue gas of/h.Remaining 280,000 Nm
3/ h, 380 ℃ of waste heat flue gases are used to produce the saturated vapor of 30t/h, 2MPa, about 180 ℃ of its exhaust gas temperature.If the fume afterheat comprehensive utilization device that adopts us to invent produces steam simultaneously and hot blast is provided, then providing 200,000 Nm
3In the time of 230 ℃ of hot blasts of/h, can also produce the saturated vapor of the 2MPa of 42t/h, about 100 ℃ of exhaust gas temperature.The PR usual manner of afterheat steam has improved 40%.The waste heat recovery rate of usual manner is 66.7%, adopts waste heat recovery rate of the present invention then can reach 73.4%, has just improved about 10% than usual manner.
Description of drawings
Fig. 1 is the structural representation of fume afterheat comprehensive utilization device of the present invention;
Fig. 2 is the structural representation of exhaust gases passes formula flue gas ejector;
Fig. 3 is that the A of Fig. 2 is to partial view;
Fig. 4 is the structural representation of pipe row formula flue gas ejector;
Fig. 5 is that the B of Fig. 4 is to partial view.
The specific embodiment
Further specify the present invention in the following examples, but should be as the restriction to scope of the present invention.
Embodiment
The structure of the embodiment of the invention as shown in Figure 1.This fume afterheat comprehensive utilization device comprises drum 1 and the water heating heating surface 6 and the water vapor heating surface that are arranged in the chimney flue type burner hearth 11, by water vapor heating surface and water heating heating surface water is heated generation steam, wherein the water vapor heating surface is made up of high-temperature evaporation heating surface 2 and low-temperature vaporization heating surface 4, drum is connected with the water vapor heating surface with water heating heating surface by the input and output pipeline, between high-temperature evaporation heating surface 2 and low-temperature vaporization heating surface 4, high-temperature flue gas ejector 3 is set, between low-temperature vaporization heating surface 4 and water heating heating surface 6, low-temperature flue gas ejector 5 is set, flue gas is imported behind the entrance point of chimney flue type burner hearth 11 and is passed through high-temperature evaporation heating surface 2 successively, high-temperature flue gas ejector 3, low-temperature vaporization heating surface 4, low-temperature flue gas ejector 5, go out boiler behind the water heating heating surface 6 and enter boiler induced-draft fan 9, discharge from chimney 10 then, the flue gas of extracting out from the delivery outlet of the delivery outlet of high-temperature flue gas ejector 3 and low-temperature flue gas ejector 5 is through behind the flue gas conditioning device and unification input air-introduced machine 8, and output is for the production use after its supercharging.
Described high-temperature flue gas ejector 3 adopts exhaust gases passes formula flue gas ejector, its structure such as Fig. 2, shown in Figure 3.Its exhaust gases passes 13 arranges that around one week of furnace wall of chimney flue type burner hearth 11 passage has slit-shaped openings to lead to burner hearth, has a total delivery outlet 12 to lead to outside the stove.
Described low-temperature flue gas ejector 5 adopts pipe row formula flue gas ejector, its structure such as Fig. 4, shown in Figure 5.Constitute one group of pipe row by 4 smoke evacuation pipes 15 and be installed in the chimney flue type burner hearth 11, pipe row is laid with some air inlets perpendicular to the flow of flue gas direction on the every pipe, and this pipe row lead to outside the stove by a total delivery outlet 14.
Claims (4)
1. fume afterheat comprehensive utilization device, comprise by drum, chimney flue type burner hearth and be arranged at water vapor heating surface in the chimney flue type burner hearth and water heating heating surface and the flue type residual heat boiler that constitutes, by water vapor heating surface and water heating heating surface water is heated generation steam, it is characterized in that also being provided with in the chimney flue type burner hearth flue gas ejector, described flue gas ejector is provided with two at least, one is arranged between water vapor heating surface and the water heating heating surface, forms the low-temperature flue gas ejector; Another is arranged in the middle of the water vapor heating surface, forms the high-temperature flue gas ejector, and the delivery outlet of two flue gas ejectors is behind flue gas conditioning device and be combined into a flue gas delivery outlet, is connected with air-introduced machine, outwards the heat outputting flue gas; Described flue gas ejector is that this exhaust gases passes has slit-shaped openings to lead in the stove perpendicular to the flow of flue gas direction exhaust gases passes in one week around the furnace wall, and has a total outlet flue to lead to outside the stove.
2. fume afterheat comprehensive utilization device according to claim 1 is characterized in that described exhaust gases passes is designed to the uniform flow variable cross-section, and is big near the sectional area of total equipped at outlet port, reduces gradually towards the far-end sectional area.
3. fume afterheat comprehensive utilization device, comprise by drum, chimney flue type burner hearth and be arranged at water vapor heating surface in the chimney flue type burner hearth and water heating heating surface and the flue type residual heat boiler that constitutes, by water vapor heating surface and water heating heating surface water is heated generation steam, it is characterized in that also being provided with in the chimney flue type burner hearth flue gas ejector, described flue gas ejector is provided with two at least, one is arranged between water vapor heating surface and the water heating heating surface, forms the low-temperature flue gas ejector; Another is arranged in the middle of the water vapor heating surface, forms the high-temperature flue gas ejector, and the delivery outlet of two flue gas ejectors is behind flue gas conditioning device and be combined into a flue gas delivery outlet, is connected with air-introduced machine, outwards the heat outputting flue gas; Described flue gas ejector is one group of pipe row of passing through section of burner hearth perpendicular to the flow of flue gas direction, forms on pipe row's the pipe to be laid with air inlet.
4. according to claim 1 or 3 described fume afterheat comprehensive utilization device, it is characterized in that described water vapor heating surface is made up of high-temperature evaporation heating surface (2) and low-temperature vaporization heating surface (4), described high-temperature flue gas ejector is arranged between high-temperature evaporation heating surface (2) and the low-temperature vaporization heating surface (4), and described low-temperature flue gas ejector is arranged between low-temperature vaporization heating surface (4) and the water heating heating surface (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910036973XA CN101482261B (en) | 2009-01-23 | 2009-01-23 | Comprehensive utilization apparatus for flue gas exhaust heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910036973XA CN101482261B (en) | 2009-01-23 | 2009-01-23 | Comprehensive utilization apparatus for flue gas exhaust heat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101482261A CN101482261A (en) | 2009-07-15 |
| CN101482261B true CN101482261B (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910036973XA Expired - Fee Related CN101482261B (en) | 2009-01-23 | 2009-01-23 | Comprehensive utilization apparatus for flue gas exhaust heat |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062384B (en) * | 2011-02-10 | 2013-09-04 | 孙军如 | Double-inlet double-outlet waste heat boiler system |
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- 2009-01-23 CN CN200910036973XA patent/CN101482261B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101482261A (en) | 2009-07-15 |
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Address after: 100036, Beijing, Fengtai District village, 288 Huaxin Building Complex floor Patentee after: Beijing Century Benefits Co., Ltd. Address before: 100840 No. 27, Beijing, Wanshou Road Patentee before: Beijing Century Yuanbo R&D Co., Ltd. |
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Address after: 100036, Beijing, Fengtai District village, 288 Huaxin Building Complex floor Patentee after: Beijing Century Benefits Co., Ltd. Address before: 100036, Beijing, Fengtai District village, 288 Huaxin Building Complex floor Patentee before: Beijing Century Benefits Co., Ltd. |
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Denomination of invention: Comprehensive utilization apparatus for flue gas exhaust heat Effective date of registration: 20120308 Granted publication date: 20110216 Pledgee: Zhongguancun Beijing science and technology Company limited by guarantee Pledgor: Beijing Century Benefits Co., Ltd. Registration number: 2012990000083 |
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Date of cancellation: 20140526 Granted publication date: 20110216 Pledgee: Zhongguancun Beijing technology financing Company limited by guarantee Pledgor: Beijing Century Benefits Co., Ltd. Registration number: 2012990000083 |
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Denomination of invention: Comprehensive utilization apparatus for flue gas exhaust heat Effective date of registration: 20141209 Granted publication date: 20110216 Pledgee: Zhongguancun Beijing technology financing Company limited by guarantee Pledgor: Beijing Century Benefits Co., Ltd. Registration number: 2014990001053 |
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Date of cancellation: 20160516 Granted publication date: 20110216 Pledgee: Zhongguancun Beijing technology financing Company limited by guarantee Pledgor: Beijing Century Benefits Co., Ltd. Registration number: 2014990001053 |
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