CN105385801A - Waste heat utilization system for cooling wall of blast furnace and application method of waste heat utilization system - Google Patents
Waste heat utilization system for cooling wall of blast furnace and application method of waste heat utilization system Download PDFInfo
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- CN105385801A CN105385801A CN201510840508.7A CN201510840508A CN105385801A CN 105385801 A CN105385801 A CN 105385801A CN 201510840508 A CN201510840508 A CN 201510840508A CN 105385801 A CN105385801 A CN 105385801A
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Abstract
The invention provides a waste heat utilization system for the cooling wall of a blast furnace. The waste heat utilization system comprises a blast furnace body and an evaporating cooling tower. The evaporating cooling tower is connected with an absorption type heat pump through a cooling wall circulating pipe in parallel. The evaporating cooling tower and the absorption type heat pump which are connected in parallel are connected with a cooling wall circulating pump and the blast furnace body in series through the cooling wall circulating pipe. A first valve and a second valve are installed at the front end and the rear end of the evaporating cooling tower respectively. A fifth valve and a sixth valve are installed at the front end and the rear end of the absorption type heat pump respectively. The system is simple in structure, installation and operation are convenient, the absorption type heat pump is used for recycling waste heat of low-temperature water in a blast furnace cooling wall circulating system, high-temperature water is made to be supplied to a user for heating and other use, heat of the blast furnace cooling wall circulating system is fully utilized, and energy is saved.
Description
Technical field
The present invention is specifically related to a kind of blast furnace cooling stave bootstrap system and application method thereof, is applied to ironmaking and waits blast furnace cooling stave waste heat recovery.
Background technology
At metallurgy industry, wait for protection ironmaking the structures such as blast furnace and equipment to be convenient to high temperature failure, need constantly to cool blast furnace, make it control in certain temperature range.At present, the cooling scheme that blast furnace cooling adopts, after adopting soft water tape loop to walk the heat of blast furnace, transfers heat to water coolant and outside air through evaporative cooler, the heat that water coolant absorbs again by cooling tower discharged to air.
But this type of cooling the most at last heat that distributes of blast furnace, all discharged to air, causes the huge waste of energy.With 1800m
3iron-smelting blast furnace is example, and the heat that blast furnace cooling stave is dispersed into air by cooling system is 18000kW, and this heat about can meet the heating demand of 180,000 square metres of floor area of building in the winter time.
Summary of the invention
The object of the invention is to overcome heat that existing blast furnace distributes all discharged to air, cause the problem of the huge waste of energy.
For this reason, the invention provides a kind of blast furnace cooling stave bootstrap system, comprise blast furnace and wet cooling tower, described wet cooling tower and absorption heat pump are connected in parallel by cooling stave circulation tube, wet cooling tower after described parallel connection and absorption heat pump are connected with cooling stave recycle pump and blast furnace by cooling stave circulation tube, and wet cooling tower and absorption heat pump two branch road of described parallel connection are switched by Valve controlling.
As one preferred embodiment, described wet cooling tower front and back end is separately installed with valve one and valve two, and the front and back end of absorption heat pump is separately installed with valve five and valve six.
Further, above-mentioned wet cooling tower is in series with cooling water circulating pump one, cooling tower and cooling water circulating pump two successively by cooling water circulation pipe.
Further, the front and back end of above-mentioned cooling water circulation pipe turnover wet cooling tower is respectively arranged with valve three and valve four.
Further, above-mentioned absorption heat pump thermal source interface connects high-pressure steam pipe; Absorption heat pump water of condensation interface connects condensate pipe, and this condensate pipe arranges condensate pump.
Further, above-mentioned absorption heat pump water inlet of hot water connects user side return water pipe; Absorption heat pump hot water outlet connects user side heating tube, and this user side heating tube arranges user side water pump.
In addition, present invention also offers the application method of this blast furnace cooling stave bootstrap system, specifically comprise the steps:
1) in cooling stave circulation tube, soft water is filled.
2) when not needing to reclaim heat in blast furnace production process, pass through valve transfer, open the branch road of wet cooling tower, close the branch road of absorption heat pump, soft water absorption blast furnace thermal temperature enters in wet cooling tower by cooling stave circulation tube through valve one after raising, and soft water entering in blast furnace cooling stave and absorb heat after releasing thermal temperature in wet cooling tower and reducing after valve two and the pressurization of cooling stave recycle pump.
3) when needing to reclaim heat in blast furnace production process, switch valve, close the branch road of wet cooling tower, open the branch road of absorption heat pump, soft water absorption blast furnace thermal temperature enters in absorption heat pump by cooling stave circulation tube through valve five after raising, and soft water entering in blast furnace cooling stave and absorb heat after releasing thermal temperature in absorption heat pump and reducing after valve six and the pressurization of cooling stave recycle pump.
Further, above-mentioned steps 2) in wet cooling tower be in series with cooling water circulating pump one, cooling tower and cooling water circulating pump two successively by cooling water circulation pipe, the front and back end of cooling water circulation pipe turnover wet cooling tower is respectively arranged with valve three and valve four;
Tap water is filled in cooling water circulation pipe, open valve three and valve four, water coolant in wet cooling tower Lower Half header tank enters into cooling tower through valve three and cooling water circulating pump one, enter in wet cooling tower by valve four after cooling water circulating pump two pressurizes again after water coolant and outside air heat-exchange temperature reduce, absorb in wet cooling tower after thermal temperature raises and enter in the header tank of wet cooling tower Lower Half.
Further, above-mentioned steps 3) middle absorption heat pump thermal source interface connection high-pressure steam pipe; Absorption heat pump water of condensation interface connects condensate pipe, and this condensate pipe arranges condensate pump; Absorption heat pump water inlet of hot water connects user side return water pipe; Absorption heat pump hot water outlet connects user side heating tube, and this user side heating tube arranges user side water pump;
Be delivered to through user side water pump after the return water pipe backwater that personal hot family temperature is lower in the future in user side is delivered in absorption heat pump and absorbs thermal temperature rising and use with hot family, form the thermal cycling of user side; High pressure steam enters in absorption heat pump by high-pressure steam pipe, drives the heat transfer process in absorption heat pump, is condensed into water of condensation and is delivered to water of condensation downstream line after high pressure steam heating after condensate pump pressurization.
Compared with prior art, beneficial effect of the present invention:
(1) this blast furnace cooling stave bootstrap system provided by the invention adopts absorption heat pump to reclaim the waste heat of water at low temperature in the blast furnace cooling stave recycle system, produce the uses such as high-temperature water supply user heating, take full advantage of the heat in the blast furnace cooling stave recycle system, save energy.
(2) this blast furnace cooling stave bootstrap system structure provided by the invention is simple, installs easy to operate, can switch wet cooling tower and absorption heat pump at any time, realizes not reclaiming heat and reclaiming heat two technological processs.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is the structural representation of blast furnace cooling stave bootstrap system of the present invention.
Description of reference numerals: 1, cooling stave circulation tube; 2, wet cooling tower; 3, valve one; 4, valve two; 5, cooling stave recycle pump; 6, cooling tower; 7, cooling water circulation pipe; 8, cooling water circulating pump one; 9, valve three; 10, valve four; 11, cooling water circulating pump two; 12, valve five; 13, valve six; 14, high-pressure steam pipe; 15, condensate pipe; 16, condensate pump; 17, absorption heat pump; 18, user side return water pipe; 19, user side heating tube; 20, user side water pump.
Embodiment
Embodiment 1:
In order to overcome heat that existing blast furnace distributes all discharged to air, cause the problem of the huge waste of energy, a kind of blast furnace cooling stave bootstrap system as shown in Figure 1 that the present embodiment provides, comprise blast furnace and wet cooling tower 2, described wet cooling tower 2 is connected in parallel by cooling stave circulation tube 1 with absorption heat pump 17, wet cooling tower 2 after described parallel connection and absorption heat pump 17 are connected with cooling stave recycle pump 5 and blast furnace by cooling stave circulation tube 1, wet cooling tower 2 and absorption heat pump 17 liang of branch roads of described parallel connection are switched by Valve controlling.
Wherein, as a kind of embodiment, above-mentioned valve can be T-valve, controls by T-valve the opening and closing switching wet cooling tower 2 and absorption heat pump 17 liang of branch roads.Another preferred embodiment is that described wet cooling tower 2 front and back end is separately installed with valve 1 and valve 24, and the front and back end of absorption heat pump 17 is separately installed with valve 5 12 and valve 6 13.
The application process of this blast furnace cooling stave bootstrap system specifically comprises the steps:
1) in cooling stave circulation tube 1, fill soft water, soft water can prevent scale effect furnace structure safety in pipeline.
2) when not needing to reclaim heat in blast furnace production process, open valve 1 and valve 24, valve-off 5 12 and valve 6 13, soft water absorption blast furnace thermal temperature enters in wet cooling tower 2 by cooling stave circulation tube 1 through valve 1 after raising, and soft water enters in blast furnace cooling stave again and absorbs heat after releasing thermal temperature in wet cooling tower 2 and reducing after valve 24 and cooling stave recycle pump 5 pressurize.
3) when needing to reclaim heat in blast furnace production process, valve-off 1 and valve 24, open valve 5 12 and valve 6 13, soft water absorption blast furnace thermal temperature enters in absorption heat pump 17 by cooling stave circulation tube 1 through valve 5 12 after raising, and soft water enters in blast furnace cooling stave again and absorbs heat after releasing thermal temperature in absorption heat pump 17 and reducing after valve 6 13 and cooling stave recycle pump 5 pressurize.
And as one preferred embodiment, step 2) in do not need reclaim heat time, wet cooling tower 2 is in series with cooling water circulating pump 1, cooling tower 6 and cooling water circulating pump 2 11 successively by cooling water circulation pipe 7, and the front and back end that described cooling water circulation pipe 7 passes in and out wet cooling tower 2 is respectively arranged with valve 39 and valve 4 10.
Tap water is filled in cooling water circulation pipe 7, open valve 39 and valve 4 10, water coolant in wet cooling tower 2 Lower Half header tank enters into cooling tower 6 through valve 39 and cooling water circulating pump 1, enter in wet cooling tower 2 by valve 4 10 after cooling water circulating pump 2 11 pressurizes again after water coolant and outside air heat-exchange temperature reduce, absorb in wet cooling tower 2 after thermal temperature raises and enter in the header tank of wet cooling tower 2 Lower Half.By this circulation, the heat of blast furnace cooling stave is dispersed in air indirectly.
In addition, step 3) in when needing to reclaim heat, absorption heat pump 17 thermal source interface is connected high-pressure steam pipe 14; Absorption heat pump 17 water of condensation interface connects condensate pipe 15, and this condensate pipe 15 arranges condensate pump 16; Absorption heat pump 17 water inlet of hot water connects user side return water pipe 18; Absorption heat pump 17 hot water outlet connects user side heating tube 19, and this user side heating tube 19 arranges user side water pump 20.
Be delivered to through user side water pump 20 after return water pipe 18 backwater that personal hot family temperature is lower in the future in user side is delivered in absorption heat pump 17 and absorbs thermal temperature rising and use with hot family, form the thermal cycling of user side; High pressure steam enters in absorption heat pump 17 by high-pressure steam pipe 14, drives the heat transfer process in absorption heat pump 17, is condensed into water of condensation and is delivered to water of condensation downstream line after high pressure steam heating after condensate pump 16 pressurizes.By this system, under the driving of high pressure steam (more than 0.6MPa) thermal source, constantly the waste heat recovery of lower for blast furnace cooling stave temperature (45 DEG C) is become the delivery of temperature higher (about 95 DEG C) to using with hot family.
In sum, this blast furnace cooling stave bootstrap system structure provided by the invention is simple, install easy to operate, absorption heat pump is adopted to reclaim the waste heat of water at low temperature in the blast furnace cooling stave recycle system, produce the uses such as high-temperature water supply user heating, take full advantage of the heat in the blast furnace cooling stave recycle system, save energy.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (9)
1. a blast furnace cooling stave bootstrap system, comprise blast furnace and wet cooling tower (2), it is characterized in that: described wet cooling tower (2) and absorption heat pump (17) are connected in parallel by cooling stave circulation tube (1), wet cooling tower (2) after described parallel connection and absorption heat pump (17) are connected with cooling stave recycle pump (5) and blast furnace by cooling stave circulation tube (1), and wet cooling tower (2) and absorption heat pump (17) two branch road of described parallel connection are switched by Valve controlling.
2. blast furnace cooling stave bootstrap system as claimed in claim 1, it is characterized in that: described wet cooling tower (2) front and back end is separately installed with valve one (3) and valve two (4), the front and back end of absorption heat pump (17) is separately installed with valve five (12) and valve six (13).
3. blast furnace cooling stave bootstrap system as claimed in claim 1 or 2, is characterized in that: described wet cooling tower (2) is in series with cooling water circulating pump one (8), cooling tower (6) and cooling water circulating pump two (11) successively by cooling water circulation pipe (7).
4. blast furnace cooling stave bootstrap system as claimed in claim 3, is characterized in that: the front and back end of described cooling water circulation pipe (7) turnover wet cooling tower (2) is respectively arranged with valve three (9) and valve four (10).
5. blast furnace cooling stave bootstrap system as claimed in claim 1 or 2, is characterized in that: described absorption heat pump (17) thermal source interface connects high-pressure steam pipe (14); Absorption heat pump (17) water of condensation interface connects condensate pipe (15), this condensate pipe (15) is arranged condensate pump (16).
6. blast furnace cooling stave bootstrap system as claimed in claim 5, is characterized in that: described absorption heat pump (17) water inlet of hot water connects user side return water pipe (18); Absorption heat pump (17) hot water outlet connects user side heating tube (19), and this user side heating tube (19) arranges user side water pump (20).
7. the application method of the blast furnace cooling stave bootstrap system as described in any one of claim 1 ~ 6, is characterized in that: comprise the steps:
1) in cooling stave circulation tube (1), soft water is filled;
2) when not needing to reclaim heat in blast furnace production process, pass through valve transfer, open the branch road of wet cooling tower (2), close the branch road of absorption heat pump (17), enter in wet cooling tower (2) by cooling stave circulation tube (1) after soft water absorption blast furnace thermal temperature raises, soft water enters in blast furnace cooling stave again and absorbs heat after releasing thermal temperature in wet cooling tower (2) and reducing after cooling stave recycle pump (5) pressurization;
3) when needing to reclaim heat in blast furnace production process, switch valve, close the branch road of wet cooling tower (2), open the branch road of absorption heat pump (17), enter in absorption heat pump (17) by cooling stave circulation tube (1) after soft water absorption blast furnace thermal temperature raises, enter again in blast furnace cooling stave after cooling stave recycle pump (5) pressurization after soft water releases thermal temperature reduction in absorption heat pump (17) and absorb heat.
8. the application method of blast furnace cooling stave bootstrap system as claimed in claim 7, it is characterized in that: described step 2) in wet cooling tower (2) be in series with cooling water circulating pump one (8), cooling tower (6) and cooling water circulating pump two (11) successively by cooling water circulation pipe (7), the front and back end that described cooling water circulation pipe (7) passes in and out wet cooling tower (2) is respectively arranged with valve three (9) and valve four (10);
Cooling water circulation pipe fills tap water in (7), open valve three (9) and valve four (10), water coolant in wet cooling tower (2) Lower Half header tank enters into cooling tower (6) through valve three (9) and cooling water circulating pump one (8), enter in wet cooling tower (2) by valve four (10) after cooling water circulating pump two (11) pressurizes again after water coolant and outside air heat-exchange temperature reduce, absorb in wet cooling tower (2) after thermal temperature raises and enter in the header tank of wet cooling tower (2) Lower Half.
9. the application method of blast furnace cooling stave bootstrap system as claimed in claim 7, is characterized in that: described step 3) middle absorption heat pump (17) thermal source interface connection high-pressure steam pipe (14); Absorption heat pump (17) water of condensation interface connects condensate pipe (15), this condensate pipe (15) is arranged condensate pump (16); Absorption heat pump (17) water inlet of hot water connects user side return water pipe (18); Absorption heat pump (17) hot water outlet connects user side heating tube (19), and this user side heating tube (19) arranges user side water pump (20);
Be delivered to through user side water pump (20) after user side return water pipe (18) backwater that personal hot family temperature is lower is in the future delivered in absorption heat pump (17) and absorbs thermal temperature rising and use with hot family, form the thermal cycling of user side; High pressure steam enters in absorption heat pump (17) by high-pressure steam pipe (14), drive the heat transfer process in absorption heat pump (17), be condensed into water of condensation after high pressure steam heating and be delivered to water of condensation downstream line after condensate pump (16) pressurization.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510840508.7A CN105385801B (en) | 2015-11-27 | 2015-11-27 | A kind of blast furnace cooling stave afterheat utilizing system and its application process |
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| CN201510840508.7A CN105385801B (en) | 2015-11-27 | 2015-11-27 | A kind of blast furnace cooling stave afterheat utilizing system and its application process |
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| CN105385801B CN105385801B (en) | 2018-07-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105864107A (en) * | 2016-05-27 | 2016-08-17 | 山东钢铁股份有限公司 | Sealed cooling system of hot water circulating pump and heating furnace water beam stand column cooling mechanism |
| CN109988874A (en) * | 2017-12-29 | 2019-07-09 | 西安华江环保科技股份有限公司 | A kind of blast furnace pure water closed circulating water system waste heat recycling system and method |
| CN113046504A (en) * | 2021-03-18 | 2021-06-29 | 东北大学 | Blast furnace production system utilizing waste heat, residual pressure and residual cooling |
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| CN104196584A (en) * | 2014-09-04 | 2014-12-10 | 昆明理工大学 | System capable of conducting power recovering and cooling by using waste heat of blast furnace slag flushing water |
| CN104279788A (en) * | 2013-07-08 | 2015-01-14 | 北京华航盛世能源技术有限公司 | Process system capable of utilizing waste heat and complementary energy of cooling water of blast furnace |
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| CN101135437A (en) * | 2007-10-12 | 2008-03-05 | 莱芜钢铁集团有限公司 | Method and device for recycling residual heat of blast furnace low-temperature recirculated water with heat pump technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864107A (en) * | 2016-05-27 | 2016-08-17 | 山东钢铁股份有限公司 | Sealed cooling system of hot water circulating pump and heating furnace water beam stand column cooling mechanism |
| CN105864107B (en) * | 2016-05-27 | 2019-03-01 | 山东钢铁股份有限公司 | The cooling system and heating furnace water beam column cooling body of the sealing of hot water circulating pump |
| CN109988874A (en) * | 2017-12-29 | 2019-07-09 | 西安华江环保科技股份有限公司 | A kind of blast furnace pure water closed circulating water system waste heat recycling system and method |
| CN109988874B (en) * | 2017-12-29 | 2024-03-15 | 西安华江环保科技股份有限公司 | System and method for recycling waste heat of pure water closed-loop circulating water of blast furnace |
| CN113046504A (en) * | 2021-03-18 | 2021-06-29 | 东北大学 | Blast furnace production system utilizing waste heat, residual pressure and residual cooling |
| CN113046504B (en) * | 2021-03-18 | 2022-06-21 | 东北大学 | Blast furnace production system utilizing waste heat, residual pressure and residual cooling |
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| CN105385801B (en) | 2018-07-24 |
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