CN203360522U - Flue gas waste heat recovery device of bell type annealing furnace - Google Patents
Flue gas waste heat recovery device of bell type annealing furnace Download PDFInfo
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- CN203360522U CN203360522U CN2013203270342U CN201320327034U CN203360522U CN 203360522 U CN203360522 U CN 203360522U CN 2013203270342 U CN2013203270342 U CN 2013203270342U CN 201320327034 U CN201320327034 U CN 201320327034U CN 203360522 U CN203360522 U CN 203360522U
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- flue gas
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- heat exchange
- exchanger rig
- annealing furnace
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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
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a flue gas waste heat recovery device of a bell type annealing furnace. The device is provided with a flue gas channel for flue gases exhausted from the bell type annealing furnace to pass, wherein a primary heat exchange device and a secondary heat exchange device are arranged in the flue gas channel along a flue gas advancing direction in sequence; heat exchange media are arranged in pipelines of the primary heat exchange device and the secondary heat exchange device; the heat exchange medium in the primary heat exchange device is heat transfer oil, and heat exchange medium in the secondary heat exchange device is cold water. According to the utility model, the classified recycle with higher efficiency for flue gas waste heat produced in the production process of the bell type annealing furnace is realized to allow the final emission flue gas temperature to meet the target requirement so as to realize energy conservation and emission reduction.
Description
(1) technical field
The utility model relates to a kind of bell type annealing furnace flue gas waste heat recovery apparatus.
(2) background technology
Steel plate needs to recover its machining property by annealing after rolling, annealing way commonly used is steel plate to be placed in to bell type annealing furnace annealed at present, bell type annealing furnace is generally obtained by combustion of natural gas in intensification and the required heat of insulating process, and combustion of natural gas can produce a large amount of flue gases, steel plate annealing needs later fume emission is carried out to discharging and charging by bell type annealing furnace is cooling, at bell type annealing furnace, in cooling process, need fume emission is fallen, during fume emission, its medial temperature is about 320 ℃ (the highest approximately 450 ℃), cold rolling mill is generally directly to be discharged into outdoor by special-purpose flue to the processing mode of these flue gases at present, also there is the part cold rolling mill to recycle this kind of flue gas, during recycling, be generally to adopt the water cycle heat exchange mode, be the discharge-channel increase aqueous vapor interchanger at flue gas, utilize the water of flue gas heat heating cycle, water after heat absorption transfers to other purposes, flue gas after heat exchange is discharged into outdoor again.
Employing directly not only wastes energy fume emission but also can produce thermal pollution to environment to outdoor mode without Btu utilization, adopt the water cycle heat exchange mode lower due to the boiling point of water and easily produce steam, and the heat utilization ratio to flue gas is lower, operating environment is had to larger safety requirements.
(3) summary of the invention
The purpose of this utility model is to provide a kind of bell type annealing furnace flue gas waste heat recovery apparatus, to realize that the waste heat that bell type annealing furnace produces flue gas in process of production recycles with classification in higher efficiency, make final discharging waste gas temperature reach target call and realize energy-saving and emission-reduction.
For achieving the above object, the utility model is by the following technical solutions:
A kind of bell type annealing furnace flue gas waste heat recovery apparatus, it is characterized in that: have for from bell type annealing furnace, discharging the exhaust gases passes that flue gas passes through, be provided with in turn first step heat-exchanger rig and second stage heat-exchanger rig along the flue gas working direction in exhaust gases passes, be equipped with heat exchange medium in the pipeline of first step heat-exchanger rig and second stage heat-exchanger rig, heat exchange medium in described first step heat-exchanger rig is thermal oil, and the heat exchange medium in the heat-exchanger rig of the described second stage is cold water.
The utility model can be improved by following scheme:
The heat exchange medium flow direction of described first step heat-exchanger rig and second stage heat-exchanger rig is contrary with the flue gas working direction.
The heat exchange medium pipeline ingress of described first step heat-exchanger rig and second stage heat-exchanger rig respectively is provided with the flow proportional variable valve.
Exhaust gases passes is provided with the first manual ball valve, and described exhaust gases passes offers the flue gas shunting branch road on the flue gas working direction before the first manual ball valve, and the flue gas shunting branch road is provided with the second manual ball valve.
Described thermal oil is at least 1.5m/s at the flow rate of pipelines of first step interchanger.
The utility model realizes that bell type annealing furnace is produced to fume afterheat in process of production to be recycled with classification in higher efficiency, makes final discharging waste gas temperature reach target call, realizes energy-saving and emission-reduction.
(4) accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
(5) embodiment
A kind of bell type annealing furnace flue gas waste heat recovery apparatus as shown in Figure 1, have for from bell type annealing furnace, discharging the exhaust gases passes 10 that flue gas passes through, and in exhaust gases passes 10, along the flue gas working direction, is provided with in turn first step heat-exchanger rig 20 and second stage heat-exchanger rig 30.
Be equipped with heat exchange medium in the pipeline of first step heat-exchanger rig 20 and second stage heat-exchanger rig 30, the heat exchange medium in described first step heat-exchanger rig 20 is thermal oil, and the heat exchange medium in described second stage heat-exchanger rig 30 is cold water.First step heat-exchanger rig 20 adopts thermal oil to carry out heat exchange, can improve the absorbed dose of fume afterheat, through 20 heat exchange of the first step heat-exchanger rig flue gas later again with the cold water heat exchange of second stage heat-exchanger rig 30, make flue gas heat obtain higher sufficient recovery, the recovery utilization rate of flue gas heat is higher.
The heat exchange medium flow direction of described first step heat-exchanger rig 20 and second stage heat-exchanger rig 30 is contrary with the flue gas working direction, the setting of all spiraling of the pipeline of first step heat-exchanger rig 20 and second stage heat-exchanger rig 30, heat exchange medium in pipeline, heat exchange medium is by the entrance (22 of the pipeline of first step heat-exchanger rig 20 and second stage heat-exchanger rig 30, 32) enter the outlet (23 of carrying out after heat exchange from pipeline, 33) discharge, (working direction of flue gas in exhaust gases passes 10 for from top to bottom) from bottom to top flows because detouring under the effect of pressure in coil pipe, thereby the temperature of the heat exchange medium in coil pipe that makes to detour from bottom to top increases progressively, fully by waste heat recovery.
The heat exchange medium pipeline ingress of described first step heat-exchanger rig 20 and second stage heat-exchanger rig 30 respectively is provided with flow proportional variable valve (21,31).Bell type annealing furnace flue gas heat recovery device is with the PLC automatic electrical control system, thermal oil and cold water can be according to temperature or traffic requirements, make the opening degree of system automatic control flow ratio adjusting valve (21,31) by parameter input, press the design temperature flow automatic regulation, reach design temperature.When the transitory stage of bell furnace in blow-on or blowing out, by system flow automatic regulation ratio adjusting valve (21,31), automatically opening degree is controlled to minimum value, avoid temperature not reach the thermal oil of requirement or cold water and enter the total system pipeline and have influence on heat transfer effect, thereby guarantee the collection of high temperature oil of bell furnace heating of other normal operation.
The flue gas emitted from bell type annealing furnace (temperature is about 320 ℃) carries out heat exchange by entering first step heat-exchanger rig 20 described exhaust gases passes 10 with the thermal oil in its pipeline, by flow control to heat-conducting oil heating after design temperature, for example thermal oil can be entered to first step heat-exchanger rig 20 with the temperature of 70～75 ℃, be raised to 150～180 ℃, and discharge after flue-gas temperature is approximately dropped to 120～125 ℃.After heat exchange, can enter open high temperature heat conductive oil insulation can (insulation can need install the nitrogen disrupter additional in case the thermal oil oxidation) under the pressure that thermal oil produces at oil pump, offer the heat acceptor by reclaiming the mode of heat with the oil pump cycle heat exchange, and then enter the bell type annealing furnace circulation and be heated.
Described thermal oil flow velocity in the pipeline of first step interchanger 20 is at least 1.5m/s, guarantees the internal circulating load of thermal oil, avoids local superheating occurs and the problem that produces carbon distribution.
Carrying out the rear flue gas of first step heat-exchanger rig 20 enters second stage heat-exchanger rig 30 along its working direction and carries out secondary heat exchange, after flue gas heat exchange, temperature drops to approximately 70 ℃, finally by smoke discharging pipe 40, discharge, can produce the approximately hot water of 70 ℃ in the heat transfer process of second stage heat-exchanger rig 30.According to measuring result, as smoke evacuation house steward air quantity is 36000Nm
3/ h, smoke exhaust fan should select to be greater than 40000Nm
3/ h, blast is greater than the above frequency conversion centrifugal blower of 3000Pa.Enter open hot water thermal insulating case under the pressure that cold water after 30 heat exchange of second stage heat-exchanger rig produces at water pump, can be according to actual service condition, determine whether hot water will circulate to enter bell furnace and be heated.
Exhaust gases passes 10 is provided with the first manual ball valve 11, described exhaust gases passes 10 offers flue gas shunting branch road 50 on the flue gas working direction before the first manual ball valve 11, flue gas shunting branch road 50 is provided with the second manual ball valve 51, is convenient to equipment repair and maintenance or emergency processing.
Above-described embodiment is better embodiment of the present utility model; but embodiment of the present utility model is not limited to this; other are any does not deviate from change, the modification done under spirit of the present utility model and principle, substitute, combination, simplify; be equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (5)
1. a bell type annealing furnace flue gas waste heat recovery apparatus, it is characterized in that: have for from bell type annealing furnace, discharging the exhaust gases passes that flue gas passes through, be provided with in turn first step heat-exchanger rig and second stage heat-exchanger rig along the flue gas working direction in exhaust gases passes, be equipped with heat exchange medium in the pipeline of first step heat-exchanger rig and second stage heat-exchanger rig, heat exchange medium in described first step heat-exchanger rig is thermal oil, and the heat exchange medium in the heat-exchanger rig of the described second stage is cold water.
2. a kind of bell type annealing furnace flue gas waste heat recovery apparatus according to claim 1, it is characterized in that: the heat exchange medium flow direction of described first step heat-exchanger rig and second stage heat-exchanger rig is contrary with the flue gas working direction.
3. a kind of bell type annealing furnace flue gas waste heat recovery apparatus according to claim 2, it is characterized in that: the heat exchange medium pipeline ingress of described first step heat-exchanger rig and second stage heat-exchanger rig respectively is provided with the flow proportional variable valve.
4. according to the arbitrary described a kind of bell type annealing furnace flue gas waste heat recovery apparatus of claims 1 to 3, it is characterized in that: exhaust gases passes is provided with the first manual ball valve, described exhaust gases passes offers the flue gas shunting branch road on the flue gas working direction before the first manual ball valve, and the flue gas shunting branch road is provided with the second manual ball valve.
5. a kind of bell type annealing furnace flue gas waste heat recovery apparatus according to claim 4, it is characterized in that: described thermal oil is at least 1.5m/s at the flow rate of pipelines of first step interchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203270342U CN203360522U (en) | 2013-06-07 | 2013-06-07 | Flue gas waste heat recovery device of bell type annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203270342U CN203360522U (en) | 2013-06-07 | 2013-06-07 | Flue gas waste heat recovery device of bell type annealing furnace |
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| Publication Number | Publication Date |
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| CN203360522U true CN203360522U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013203270342U Expired - Lifetime CN203360522U (en) | 2013-06-07 | 2013-06-07 | Flue gas waste heat recovery device of bell type annealing furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483355A (en) * | 2015-12-08 | 2016-04-13 | 无锡华工薄板有限公司 | Slow cooling device of annealing furnace for cold-rolled sheet |
| CN112268465A (en) * | 2020-10-23 | 2021-01-26 | 鞍山绿冶热能工程技术有限公司 | Coke oven flue gas desulfurization and denitrification waste heat recovery system and process |
| CN113175827A (en) * | 2021-06-01 | 2021-07-27 | 江苏凯特汽车部件有限公司 | Waste heat gathering device and smelting furnace waste heat grading efficient utilization system |
-
2013
- 2013-06-07 CN CN2013203270342U patent/CN203360522U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483355A (en) * | 2015-12-08 | 2016-04-13 | 无锡华工薄板有限公司 | Slow cooling device of annealing furnace for cold-rolled sheet |
| CN112268465A (en) * | 2020-10-23 | 2021-01-26 | 鞍山绿冶热能工程技术有限公司 | Coke oven flue gas desulfurization and denitrification waste heat recovery system and process |
| CN113175827A (en) * | 2021-06-01 | 2021-07-27 | 江苏凯特汽车部件有限公司 | Waste heat gathering device and smelting furnace waste heat grading efficient utilization system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 528400 No. 25, Dong Yi Road, Torch Development Zone, Guangdong, Zhongshan Patentee after: Yuehai Zhongyue (Zhongshan) tinplate Industry Co.,Ltd. Address before: 528437 No. 25, Dong Yi Road, Torch Development Zone, Guangdong, Zhongshan Patentee before: ZHONGSHAN ZHONGYUE TINPLATE INDUSTRIAL Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |
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| CX01 | Expiry of patent term |