CN209116788U - Make steel waste heat recycling system - Google Patents
Make steel waste heat recycling system Download PDFInfo
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- CN209116788U CN209116788U CN201821856804.1U CN201821856804U CN209116788U CN 209116788 U CN209116788 U CN 209116788U CN 201821856804 U CN201821856804 U CN 201821856804U CN 209116788 U CN209116788 U CN 209116788U
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- waste heat
- oxygen
- eliminating device
- heat
- steel
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Abstract
The utility model discloses a kind of steel-making waste heat recycling system, this system, which drains storage heater, is sent into oxygen-eliminating device, recyclable soft water and the heat for taking full advantage of draining.And the deoxygenation of hot water can reduce the consumption of deoxygenation steam in turn in the heat auxiliary oxygen-eliminating device generated using low pressure recycle waste heat boiler.In Heating Season, the hot water through low pressure recycle waste heat boiler enters heating heat-exchange station and carries out heat exchange, can heat heating water, and then heated using the heat that low pressure recycle waste heat boiler recycles.By this system, the cascade utilization of heat can be sufficiently realized, reduce the soft water loss of system, reduce environmental pollution.
Description
Technical field
The utility model belongs to waste heat recycling field, and in particular to a kind of steel-making waste heat recycling system.
Background technique
In steelmaking process, a large amount of high-temperature flue gas will be generated, this part of waste heat can be generally recycled by waste heat boiler.Due to
The periodicity of smelting, the quantity of steam that waste heat boiler generates also have biggish fluctuation, and the instantaneous steam production for such as smelting the phase is reachable
Up to a hundred ton/hours, rather than phase boiler duty is smelted close to zero.To balance so huge steam load fluctuation, it is usually used
The technology that waste heat boiler+steam accumulator combines realizes the continuous-stable output of afterheat steam.
Steel-making residual neat recovering system generally uses high pressure and low pressure binary cycle system.Low pressure recycle system plays heating soft water
And the effect of auxiliary deoxygenation, and high-pressure recycle system then mainly generates afterheat steam.For pneumatic steelmaking residual neat recovering system
Speech, movable gas hood, feed opening, oxygen rifle mouth, mobile section generally form low pressure recycle by low pressure recycle pump and oxygen-eliminating device together
System；And fixed section, one section of tail portion, two sections of tail portion and drum then form high-pressure recycle system together.For electric furnace steel making waste heat
For recovery system, bell, four hole flues, movable sliding sleeve, bend pipe flue, expansion chamber top cover etc. are followed with oxygen-eliminating device composition low pressure
Loop system；Waste heat boiler evaporator section and drum then form high-pressure recycle system.
It is larger due to smelting phase boiler duty, if catch water of boiler barrel safeguards that not in place or drum sends steam stream outside
Amount control is bad, will lead to and sends steam seriously band water outside.The mechanical water that drum is taken out of is finally captured by storage heater, leads to accumulation of heat
Device liquid level increases extremely, and then need to largely exhaust it.The draining of storage heater is all made of automatic control at present, sets when liquid level is higher than
Just start to drain after definite value, draining is directly entered trench, leads to a large amount of soft water and thermal loss.The practical system of domestic more steel mills
Count display, the afterheat steam yield of pneumatic steelmaking is 80~120kg/t steel, but system soft water consumption be 130~
180kg/t steel.Soft water waste is up to 50~100kg/t steel.The loss of soft water is pressed from both sides by boiler blow-off, storage heater draining and steam
Band mechanical water three parts form, and according to design data, boiler blowdown rate is usually no more than 10% (8~12kg/t steel).Steam warp
After crossing storage heater, band regimen condition will obtain biggish improvement, and it is negligible that accumulator outlet steam contains mechanical water.Thus may be used
See, the soft water amount lost by storage heater draining is larger, and the temperature of storage heater draining is generally 180~250 DEG C of (corresponding pressures
1~4MPa of power), pressure drop when condensed water is discharged, and then vaporize, it generates a large amount of " Bai Yu " and pollutes environment, while also making
At a large amount of heat waste.
Steam after storage heater accumulation of heat can realize the output of continuous-stable, be generally used for power generation and full factory's heating.And
The requirement to heat to heat source is lower, and the principle of cascaded utilization of energy is not met with afterheat steam heating, and heating economy is poor.
To sum up, it need to seek that a kind of solution steel-making residual neat recovering system soft water loss amount is big, afterheat steam heating is less economical
The problems such as method.
Summary of the invention
In view of this, realizing heat the purpose of this utility model is to provide a kind of steel-making waste heat recycling system
Cascade utilization reduces the soft water loss of system.
In order to achieve the above objectives, the utility model provides the following technical solutions:
A kind of steel-making waste heat recycling system, including high-pressure recycle system and low pressure recycle system, wherein cycle of higher pressure
System the sequentially connected cycle of higher pressure waste heat boiler of pipeline, drum and storage heater mainly by being made up of, low pressure recycle system
It is mainly formed by oxygen-eliminating device and by the low pressure recycle waste heat boiler that low pressure recycle pump is connected with oxygen-eliminating device, storage heater and deoxygenation
Steam conveying pipe is connected between device；The draining conveying that storage heater draining is conveyed into oxygen-eliminating device is connected between storage heater and oxygen-eliminating device
Pipeline；Further include the heating heat-exchange station being connected with heating user, is parallel with branch I on the outlet conduit of low pressure recycle waste heat boiler
With branch II, branch I is directly connected with oxygen-eliminating device, and branch II is connected with oxygen-eliminating device again behind heating heat-exchange station, branch I and branch
Road II is correspondingly provided with valve.
It further, further include the Turbo-generator Set for being connected and receiving the steam after accumulation of heat with storage heater.
Further, Turbo-generator Set is connected by condenser with oxygen-eliminating device.
Further, condenser is connected by condensate pump with oxygen-eliminating device.
Further, the outlet of oxygen-eliminating device is connect with drum and storage heater respectively by aqueduct, is set on aqueduct
There is feed pump.
Further, the aqueduct being connected with storage heater is equipped with water compensating valve.
Further, heating heat-exchange station is plate heat exchanger or shell-and-tube heat exchanger.
Further, for pneumatic steelmaking system, low pressure recycle waste heat boiler is movable gas hood, feed opening, oxygen rifle mouth, movement
Any one in section.
Further, for electric furnace steel-making system, low pressure recycle waste heat boiler be furnace lid, four hole flues, movable sliding sleeve,
Any one in bend pipe flue, expansion chamber top cover.
The utility model has the beneficial effects that: this system, which drains storage heater, is sent into oxygen-eliminating device, recyclable soft water simultaneously fills
Divide the heat that draining is utilized.And using low pressure recycle waste heat boiler generate heat auxiliary oxygen-eliminating device in hot water deoxygenation into
And the consumption of deoxygenation steam can be reduced.In Heating Season, the hot water through low pressure recycle waste heat boiler enters heating heat-exchange station and carries out heat
Exchange, can heat heating water, and then be heated using the heat that low pressure recycle waste heat boiler recycles.It, can by this system
The cascade utilization for sufficiently realizing heat reduces the soft water loss of system, reduces environmental pollution.
Detailed description of the invention
In order to keep the purpose of this utility model, technical scheme and beneficial effects clearer, the utility model provides as follows
Attached drawing is illustrated:
Fig. 1 is the schematic diagram of this system；
Wherein: cycle of higher pressure waste heat boiler -1, drum -2, storage heater -3, drain valve -3.1, water compensating valve -3.2, vapour
Turbine generator group -4, condenser -5, condensate pump -5.1, oxygen-eliminating device -6, feed pump -6.1, low pressure recycle pump -6.2,
Heating heat-exchange station -7, heat exchange station by-passing valve -7.1, heat exchange station exits and entrances valve -7.2, heating user -8, more than low pressure recycle
Heat boiler -9, draining conveyance conduit -10, branch I -11, branch II -12, aqueduct -13, steam conveying pipe -
14。
Specific embodiment
Below in conjunction with attached drawing, the preferred embodiment of the utility model is described in detail.
A kind of steel-making waste heat recycling system, including high-pressure recycle system and low pressure recycle system, wherein cycle of higher pressure
System is mainly by passing through the sequentially connected cycle of higher pressure waste heat boiler 1 of pipeline, drum 2, storage heater 3 and Turbo-generator Set 4
Composition, low pressure recycle system is mainly by oxygen-eliminating device 6 and by more than 6.2 low pressure recycle that is connected with oxygen-eliminating device 6 of low pressure recycle pump
Heat boiler 9 forms；Steam conveying pipe 14 is connected between storage heater 3 and oxygen-eliminating device 6.Also being connected between storage heater 3 and oxygen-eliminating device 6 will store
Hot device drains the draining conveyance conduit 10 being conveyed into oxygen-eliminating device 6.It further include being connected in low pressure recycle system with heating user 8
Heating heat-exchange station 7, branch I 11 and branch II 12 are parallel on the outlet conduit of low pressure recycle waste heat boiler 9, and branch I 11 is direct
It is connected with oxygen-eliminating device 6, branch II 12 is connected with oxygen-eliminating device 6 again behind heating heat-exchange station 7, and branch I 11 is corresponding with branch II 12
Wherein it is heat exchange station by-passing valve 7.1 on branch I 11 equipped with valve, is heat exchange station exits and entrances valve 7.2 on branch II 12.
Specifically, cycle of higher pressure waste heat boiler 1 is connected with drum 2, the afterheat steam of generation is sent by pipeline to storage heater 3
Carry out accumulation of heat.On the one hand steam after 3 accumulation of heat of storage heater is sent to Turbo-generator Set 4 generates electricity, on the other hand defeated by steam
Pipeline 14 is sent to send to 6 deoxygenation of oxygen-eliminating device.
Oxygen-eliminating device 6 is connected by low pressure recycle pump 6.2 with low pressure recycle waste heat boiler 9, and low pressure recycle waste heat boiler 9 is passed through
Hot water after heating enters branch I 11 and branch II 12 by outlet conduit is corresponding, can both pass through the heat exchange station on branch I 11
By-passing valve 7.1 returns to oxygen-eliminating device 6, can also enter heating heat-exchange station 7 by the heat exchange station terminal valve 7.2 on branch II 12,
Oxygen-eliminating device 6 is returned again to after heating heat-exchange station 7 carries out heat exchange.Wherein heating heat-exchange station 7 can pass through dividing wall type heat exchanger, such as plate
The hot water and heating water that formula heat exchanger, shell-and-tube heat exchanger etc. generate low pressure recycle waste heat boiler 9 carry out heat exchange, and supply
Hot water is to heating user 8.
Be provided with drain valve 3.1 and water compensating valve 3.2 on storage heater 3, the outlet of oxygen-eliminating device 6 by aqueduct 13 respectively with
Drum 2 and storage heater 3 connect, and aqueduct 13 is equipped with feed pump 6.1.Wherein drain valve 3.1 is connected to draining delivery pipe
On road 10, storage heater draining is conveyed into oxygen-eliminating device 6；Water compensating valve 3.2 is connected in the aqueduct 13 being connected with storage heater 3
On, drum 2 or storage heater 3 are sent into after water pressurizes by feed pump 6.1 in the outlet of oxygen-eliminating device 6, are finally completed water-vapour circulation
Process.
Turbo-generator Set 4 is connected by condenser 5 with oxygen-eliminating device 6, is equipped with condensed water between condenser 5 and oxygen-eliminating device 6 again
Pump 5.1 is connected.Steam exhaust after the acting of Turbo-generator Set 4 enters condenser 5, and the condensed water formed after steam exhaust condensation passes through
Condensate pump 5.1 is sent to oxygen-eliminating device 6.
Storage heater is drained by draining conveyance conduit 10 and is sent into oxygen-eliminating device by this system, and recyclable soft water simultaneously takes full advantage of
The heat of draining.And the deoxygenation of hot water can subtract in turn in the heat auxiliary oxygen-eliminating device 6 generated using low pressure recycle waste heat boiler 9
The consumption of few deoxygenation steam.In Heating Season, (90~100 DEG C) of hot water through low pressure recycle waste heat boiler 9 enter heating heat-exchange station 7
The heat for carrying out heat exchange, heating water being heated to 80 DEG C from 50 DEG C, and then recycle using low pressure recycle waste heat boiler 9 into
Row heating.By this system, the cascade utilization of heat can be sufficiently realized, reduce the soft water loss of system.
For pneumatic steelmaking system, movable gas hood, feed opening, oxygen rifle mouth, mobile section etc. be can be used as more than low pressure recycle
Heat boiler；For electric furnace steel-making system, furnace lid, four hole flues, movable sliding sleeve, bend pipe flue, expansion chamber top cover etc.
Using as low pressure recycle waste heat boiler.
Finally, it is stated that preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage
Solution, can make various changes, without departing from the utility model claims book institute to it in the form and details
The range of restriction.
Claims (9)
1. a kind of steel-making waste heat recycling system, including high-pressure recycle system and low pressure recycle system, wherein cycle of higher pressure system
System the sequentially connected cycle of higher pressure waste heat boiler of pipeline, drum and storage heater mainly by being made up of, low pressure recycle system master
It to be formed by oxygen-eliminating device and by the low pressure recycle waste heat boiler that low pressure recycle pump is connected with oxygen-eliminating device, storage heater and oxygen-eliminating device
Between be connected with steam conveying pipe；Storage heater draining is conveyed into oxygen-eliminating device it is characterized by: being connected between storage heater and oxygen-eliminating device
Draining conveyance conduit；It further include the heating heat-exchange station being connected with heating user, on the outlet conduit of low pressure recycle waste heat boiler
Be parallel with branch I and branch II, branch I is directly connected with oxygen-eliminating device, branch II behind heating heat-exchange station again with oxygen-eliminating device phase
Even, branch I and branch II are correspondingly provided with valve.
2. steel-making waste heat recycling system according to claim 1, it is characterised in that: further include being connected simultaneously with storage heater
Receive the Turbo-generator Set of the steam after accumulation of heat.
3. steel-making waste heat recycling system according to claim 2, it is characterised in that: Turbo-generator Set passes through condensing
Device is connected with oxygen-eliminating device.
4. steel-making waste heat recycling system according to claim 3, it is characterised in that: condenser by condensate pump with
Oxygen-eliminating device is connected.
5. steel-making waste heat recycling system according to claim 1, it is characterised in that: the outlet of oxygen-eliminating device passes through water delivery
Pipeline is connect with drum and storage heater respectively, and aqueduct is equipped with feed pump.
6. steel-making waste heat recycling system according to claim 5, it is characterised in that: the water-supply-pipe being connected with storage heater
Road is equipped with water compensating valve.
7. steel-making waste heat recycling system according to claim 1, it is characterised in that: heating heat-exchange station is plate-type heat-exchange
Device or shell-and-tube heat exchanger.
8. steel-making waste heat recycling system according to claim 1, it is characterised in that: low for pneumatic steelmaking system
Pressure circulation Waste-heat Boiler is movable gas hood, feed opening, oxygen rifle mouth, any one in mobile section.
9. steel-making waste heat recycling system according to claim 1, it is characterised in that: low for electric furnace steel-making system
Pressure circulation Waste-heat Boiler is furnace lid, four hole flues, movable sliding sleeve, bend pipe flue, any one in expansion chamber top cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821856804.1U CN209116788U (en) | 2018-11-12 | 2018-11-12 | Make steel waste heat recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821856804.1U CN209116788U (en) | 2018-11-12 | 2018-11-12 | Make steel waste heat recycling system |
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| Publication Number | Publication Date |
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| CN209116788U true CN209116788U (en) | 2019-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269315A (en) * | 2018-11-12 | 2019-01-25 | 中冶赛迪技术研究中心有限公司 | Make steel waste heat recycling system |
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2018
- 2018-11-12 CN CN201821856804.1U patent/CN209116788U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269315A (en) * | 2018-11-12 | 2019-01-25 | 中冶赛迪技术研究中心有限公司 | Make steel waste heat recycling system |
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