CN103184299B - Heat recovery method and heat recovery device for slag flushing water of iron and steel plant - Google Patents
Heat recovery method and heat recovery device for slag flushing water of iron and steel plant Download PDFInfo
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- CN103184299B CN103184299B CN201210276910.3A CN201210276910A CN103184299B CN 103184299 B CN103184299 B CN 103184299B CN 201210276910 A CN201210276910 A CN 201210276910A CN 103184299 B CN103184299 B CN 103184299B
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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
- Y02P10/20—Recycling
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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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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention provides a heat recovery method for slag flushing water of an iron and steel plant, which comprises the following steps: (1) the slag flushing water flows into a heat recovery device from a slag flushing water pool; (2) heating circulating water flows into the heat recovery device; and (3) in the heat recovery device, the high-temperature slag flushing water transfers heat to the low-temperature circulating water. The method is characterized in that the slag flushing water flows into the heat recovery device and is subjected to flash evaporation to generate steam; and the steam coagulates in the heating circulating water flowing into the heat recovery device, so that the temperature of the circulating water rises. The main structure of the heat recovery device for slag flushing water of the iron and steel plant, provided by the invention, comprises a slag flushing water radiator, a circulating water heat absorber, an air removing device, an anti-cavitation device and a water suction pump, wherein heat release and temperature reduction of the slag flushing water are realized in the slag flushing water radiator by virtue of flash evaporation; and heat absorption and temperature rise of the heating circulating water are realized in the circulating water heat absorber by virtue of steam condensation; the heat recovery device is characterized in that a steam channel of the slag flushing water is arranged between the slag flushing water radiator and the circulating water heat absorber; and the steam of the slag flushing water gets into the circulating water heat absorber to heat the heating circulating water.
Description
Technical field
The present invention relates to hot swapping, particularly relate to Steel Plant's washing slag water heat energy recovering method and device.
Background technology
China has been the big country of Iron and Steel Production, and the annual production of iron and steel accounts for 40% of Gross World Product.No matter be steel-making or ironmaking, all will produce a large amount of slags.Slag is generation of accompanying with iron and steel, it is the byproduct of smelting iron and steel, it is again the primary condition of a series of important metallurgical reaction, it participates in physical-chemical reaction and the mass-and heat-transfer process of steel smelting procedure directly, it not only has influence on iron and steel output, quality, and has close relationship with the consumption of starting material, energy.
In ferrous metallurgy stove, produce the high temperature furnace slag of 1400-1500 DEG C, after cinder notch flows out, again when slag runner enters flushing cinder chute, with certain water yield, hydraulic pressure and the chute gradient, water is made to become certain angle of cut with slag stream, slag, by cold shock, bursts into the qualified grain slag of certain particle size.After pulp water is separated, slag is used as material of construction; Carry out the washing slag water of heat exchange with high temperature furnace slag, enter flushing cinder pond.Flushing cinder pond takes up an area several thousand square metres usually; above flushing cinder pond, hot vapour soars; washing slag water temperature remains on 60-80 DEG C throughout the year; be a huge potential heat energy energy, if can effectively be used, such as utilize the heat energy of washing slag water; winter is Residential areas heating; can be not only that country saves a large amount of fuel, and decrease carbon emission, protect environment.
The heat of Steel Plant's washing slag water can Utilizing question, is not also well solved so far.
Due to washing slag water Reusability, dissolved into the plurality of inorganic salt and oxide compound that contain in slag in washing slag water, defining is almost saturated saline-alkali water solution.When slag bursts in grain slag process by cold shock, some tiny slag enters in water and suspends.Detect through reality, washing slag water turbidity is 60-80mg/l.
Certain enterprise that heats, by recuperative heat exchanger, passes to recirculated water by the heat of washing slag water, utilizes recirculated water to heat to Residential areas.In an only winter, less than the heating duration of 4 months, the washing slag water side of recuperative heat exchanger, fouling reached 3-5 centimetre, and dirty layer is hard, fluffs loose after weathering.Think afterwards by analysis, the composition of washing slag water fouling in interchanger is the multiple inorganic salt containing crystal water, such as, containing the silicate of crystal water.The crystallization incrustation scale that washing slag water is hard, makes recuperative heat exchanger almost scrap completely.
Someone attempts there is metre filter washing slag water, to solve washing slag water scaling problem on heat exchangers.Washing slag water is the saline-alkali water of Multiple components, and for saline-alkali water, strainer is not used completely.Saline-alkali water can pass through any strainer smoothly, and it is inner to have arrived interchanger, runs into cold interchanger wall, and saline-alkali water is lowered the temperature, supersaturation, at once crystallization on cold wall.
In saline-alkali water solution, crystal formation process is called crystallization.The method of crystallization generally has two kinds: one is evaporating solvent method, and it is applicable to temperature affects little material to solubleness.Coastland produces and evaporates brine is exactly this method utilized.Another kind is cooling heat saturated solution method, and this method is applicable to temperature and raises, the material that solubleness also increases.As the salt lake of northern area, summer temperature is high, and lake surface occurs without crystal; In every winter, temperature reduces, and the materials such as crystal soda (Na2CO310H2O), saltcake (Na2SO410H2O) just separate out from salt lake.Washing slag water fouling, just because of on interchanger wall, cools saline and alkaline hydro-thermal saturated solution, the crystallization of generation.
In industrial or agricultural and people's lives, discharge various sewage.Sewage heat exchanger and ordinary heat exchanger working conditions make a big difference, the method for design of ordinary heat exchanger, and use experience can not be used for sewage heat exchanger.It is although the method for design of ordinary heat exchanger and manufacturing process, all very ripe, sewage heat exchanger science design method, so far, does not also solve very well.
The above-mentioned background technology about sewage heat exchanger and saline-alkali water crystallization, has a detailed description in following monograph:
1, Zhao Jun, Dai Chuanshan chief editor, ground source heat pump technology and building energy conservation are applied, Beijing: China Construction Industry Press, 2009.
2, (U.S.) salad, Sai Kulike work, Cheng Linyi, design of heat exchanger technology, Beijing: China Machine Press, 2010.
3, Xin Jian, Wang Huilong chief editor, Advanced Inorganic Chemistry, Beijing: during Higher education publishing, 2010.
4, He Fengjiao chief editor, inorganic chemistry, Beijing: Science Press, 2007.
Summary of the invention
The present invention provides a kind of Steel Plant washing slag water heat energy recovering method, and it is made up of the following step:
(1) washing slag water flows into heat-energy recovering apparatus from flushing cinder pond; (2) circulation water for heating flows into heat-energy recovering apparatus; (3) in heat-energy recovering apparatus, high temperature washing slag water is to cold cycle heat transfer water; (4) circulation water for heating heated up flows out heat-energy recovering apparatus, to user's heat supply; (5) washing slag water of having lowered the temperature flows out heat-energy recovering apparatus, return to flushing cinder pond, the method is characterized in that: washing slag water flows into heat-energy recovering apparatus flash distillation and produces steam, vapor condenses, in the circulation water for heating flowing into heat-energy recovering apparatus, makes recirculated water heat up.
The present invention provides a kind of Steel Plant washing slag water heat-energy recovering apparatus, its primary structure comprises: washing slag water radiator, recirculated water heat absorber, deaeration device, anti cavitation device and lift pump, washing slag water is lowered the temperature in the heat release of washing slag water radiator, circulation water for heating absorbs heat intensification in recirculated water heat absorber, deaeration device picks out above recirculated water heat absorber, anti cavitation device to be connected on washing slag water radiator rising pipe before lift pump, it is characterized in that:
(1) said washing slag water radiator is washing slag water flasher;
(2) said recirculated water heat absorber is carbonated drink contact circulating water heating hydrophone;
(3) its structure also comprises: in the middle of washing slag water radiator and recirculated water heat absorber, have the vapour passage of a washing slag water.
The structure (one) of washing slag water radiator comprises: cylindrical shell, vapour passage, water inlet pipe, traverse baffle, ponding room, water level sensor and rising pipe, washing slag water enters washing slag water radiator by water inlet pipe, along the tortuous passageway of Multi-level deflector plate, flow downward step by step, flash distillation simultaneously produces steam, steam upwards enters recirculated water heat absorber by vapour passage, remaining saturated washing slag water flows out from the rising pipe of bottom, in washing slag water radiator, there is a water level sensor, the signal that it provides passes to the automatic regulating valve of water inlet pipe, control the ponding room water surface in the altitude range of regulation.
The structure (two) of washing slag water radiator comprises: cylindrical shell, vapour passage, water inlet pipe, water spraying tray, ponding room, water level sensor and rising pipe, washing slag water enters washing slag water radiator by water inlet pipe, along the tortuous passageway of multistage water spraying tray 1,100 leaking holes, trickle down downwards step by step, flash distillation simultaneously produces steam, steam upwards enters recirculated water heat absorber by vapour passage, remaining saturated washing slag water flows out from the rising pipe of bottom, in washing slag water radiator, there is a water level sensor, the signal that it provides passes to the automatic regulating valve of water inlet pipe, control the ponding room water surface in the altitude range of regulation.
The structure (three) of washing slag water radiator comprises: cylindrical shell, vapour passage, water inlet pipe, water jet standpipe, ponding room, water level sensor and rising pipe, washing slag water enters washing slag water radiator by water inlet pipe, to circle round 1,100 spout holes of downward water jet standpipe from being close to cylinder inboard wall, spray to inner barrel space fierceness, flash distillation simultaneously produces steam, steam upwards enters recirculated water heat absorber by vapour passage, remaining saturated washing slag water flows out from the rising pipe of bottom, in washing slag water radiator, there is a water level sensor, the signal that it provides passes to the automatic regulating valve of water inlet pipe, control the ponding room water surface in the altitude range of regulation.
The structure (one) of recirculated water heat absorber comprises: cylindrical shell, effuser, water inlet pipe, traverse baffle, water deflector cover, water level sensor and rising pipe, recirculated water enters recirculated water heat absorber from water inlet pipe, along the tortuous passageway of Multi-level deflector plate, trickle downwards step by step, from the washing slag water steam that bottom steam passage is come in, get around water deflector cover, ascension from bottom to top, the two meets in recirculated water heat absorber internal space, steam is dissolved in undersaturated recirculated water, improve circulating water temperature, last recirculated water is flowed out by rising pipe, a water level sensor is arranged at cylindrical shell bottom, water level signal passes to the automatic regulating valve on water inlet pipe, to control cylindrical shell accumulating at lower part hydroecium water level in specialized range, the noncondensable gas of recirculated water heat absorber cylinder cylinder accumulation, be discharged in air through effuser.
The structure (two) of recirculated water heat absorber comprises: cylindrical shell, effuser, water inlet pipe, water spraying tray, water deflector cover, water level sensor and rising pipe, recirculated water enters recirculated water heat absorber from water inlet pipe, 1,100 leaking holes along multistage water spraying tray are trickled down downwards, from the washing slag water steam that bottom steam passage is come in, get around water deflector cover, ascension from bottom to top, the two meets in recirculated water heat absorber internal space, steam is dissolved in undersaturated recirculated water, improve circulating water temperature, last recirculated water is flowed out by rising pipe, a water level sensor is arranged at cylindrical shell bottom, water level signal passes to the automatic regulating valve on water inlet pipe, to control cylindrical shell accumulating at lower part hydroecium water level in specialized range, the noncondensable gas of recirculated water heat absorber cylinder cylinder accumulation, be discharged in air through effuser.
The structure (three) of recirculated water heat absorber comprises: cylindrical shell, effuser, water inlet pipe, water jet standpipe, water deflector cover, water level sensor and rising pipe, recirculated water enters recirculated water heat absorber from water inlet pipe, to circle round 1,100 spout holes of downward water jet standpipe from being close to cylinder inboard wall, spray to inner barrel space fierceness, from the washing slag water steam that bottom steam passage is come in, get around water deflector cover, ascension from bottom to top, the two meets in recirculated water heat absorber internal space, steam is dissolved in undersaturated recirculated water, improve circulating water temperature, last recirculated water is flowed out by rising pipe, a water level sensor is arranged at cylindrical shell bottom, water level signal passes to the automatic regulating valve on water inlet pipe, to control cylindrical shell accumulating at lower part hydroecium water level in specialized range, the noncondensable gas of recirculated water heat absorber cylinder cylinder accumulation, be discharged in air through effuser.
The structure of deaeration device comprises: air collector, reverse checkvalve, vacuum pump, temperature sensor and controller, the air collector of deaeration device passes through effuser, be connected to the top of recirculated water heat absorber, the escape pipe of air collector connects vacuum pump, reverse checkvalve is had before vacuum pump, the noncondensable gas comprised in the system of washing slag water radiator and recirculated water heat absorber extracted out by vacuum pump, the opening and closing of vacuum pump is controlled by the controller, controller gathers the numerical value of the temperature sensor on air collector and recirculated water heat absorber at any time, when both temperature difference are greater than prescribed value, just start vacuum pump, stop without temperature difference.
The structure of anti cavitation device comprises: cooling pond, water inlet pipe, rising pipe, automatic regulating valve, temperature sensor and lift pump, the saturated washing slag water of washing slag water radiator flows out from water shoot, mix with the cold water come from cooling pond rising pipe, cooling becomes unsaturated water, extract out through lift pump again, on the rising pipe of cooling pond, there is automatic regulating valve, it gathers the temperature sensor signal of on water shoot 2, automatic adjustment cool water pipe flow area, in control water shoot, washing slag water is before entering lift pump, blending cold water cooling 3-5 DEG C, ensure that washing slag water lift pump does not produce cavitation.
Accompanying drawing explanation
The basic step figure of Tu1Shi Steel Plant of the present invention washing slag water heat energy recovering method;
The overall construction drawing of Tu2Shi Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment;
The washing slag water radiator structure (one) of Tu3Shi Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment;
The washing slag water radiator structure (two) of Tu4Shi Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment;
The washing slag water radiator structure (three) of Tu5Shi Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment;
The recirculated water heat absorber structure (one) of Tu6Shi Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment;
The recirculated water heat absorber structure (two) of Tu7Shi Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment;
The recirculated water heat absorber structure (three) of Tu8Shi Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment;
The deaeration device structure iron of Tu9Shi Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment;
Figure 10 is the anti cavitation device structure iron of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Fig. 1 gives the basic step figure of Steel Plant of the present invention washing slag water heat energy recovering method.
The basic step of Steel Plant's washing slag water heat energy recovering method is:
1, the hot washing slag water in flushing cinder pond 5, enters washing slag water radiator 30 by washing slag water radiator inlet channel, and washing slag water radiator inlet channel has inlet regulating valve 31.
2, the pressure in washing slag water radiator 30 lower than saturation pressure corresponding to import hot washing slag water temperature, so washing slag water enters part evaporation at once after washing slag water radiator, also referred to as being flash distillation or dilatation.
3, the steam produced in washing slag water radiator 30, by steam conveying pipe, enters recirculated water heat absorber 20.
4, remaining saturated washing slag water in washing slag water radiator 30, flows out from the water shoot of bottom, mixes, becomes unsaturated water, then discharge through lift pump 45, and send flushing cinder pond back to the part cold water of cooling pond 40.On the rising pipe of cooling pond 40, there is variable valve 41.
5, heating recirculated water, by recirculated water heat absorber water inlet pipe, enters recirculated water heat absorber from recirculated water heat absorber 20 top.Recirculated water heat absorber water inlet pipe there is inlet regulating valve 21.
6, in recirculated water heat absorber 20, heating recirculated water sprays downwards from top, and the washing slag water steam ascension from bottom to top of coming in from bottom, the two meets in recirculated water heat absorber internal space, and close contact, steam is dissolved in rapidly undersaturated recirculated water, and the heat of steam improves circulating water temperature.
7, by warmed-up heating recirculated water in recirculated water heat absorber 20, flowed out by recirculated water heat absorber rising pipe, recirculated water heat absorber rising pipe has lift pump 46.
8, above recirculated water heat absorber 20, there are an air collector 10 and vacuum pump 12, constantly extract the noncondensable gas comprised in the system of washing slag water radiator and recirculated water heat absorber out, it is exactly mainly the gas dissolved that washing slag water and recirculated water are separated out, and leaked-in air in system, thus intrasystem vacuum tightness can be ensured.
Fig. 2 gives the overall construction drawing of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment, is divided into four parts: washing slag water radiator, recirculated water heat absorber, deaeration device and anti cavitation device generally.
Recirculated water heat absorber 20 is seated in above washing slag water radiator 30, and the two is in same pressurized vessel, and deaeration device picks out above recirculated water heat absorber, and anti cavitation device connects with the rising pipe of washing slag water radiator 30.
Hot washing slag water enters washing slag water radiator 30 by washing slag water radiator inlet channel, and washing slag water radiator inlet channel has inlet regulating valve 31.Pressure in washing slag water radiator 30 lower than saturation pressure corresponding to import hot washing slag water temperature, so washing slag water evaporates after entering washing slag water radiator at once.The steam that washing slag water produces, by steam-pipe 34, enters recirculated water heat absorber 20., there is a water deflector cover 24 top of steam-pipe 34, and water deflector cover 24 can prevent the recirculated water that recirculated water heat absorber space is dripped from can not fall into washing slag water radiator, and washing slag water radiator is unaffected to recirculated water heat absorber delivering vapor.
Remaining saturated washing slag water in washing slag water radiator 30, flows out from the water shoot of bottom, mixes, becomes unsaturated water, then discharge through lift pump 45, and send flushing cinder pond back to the part cold water of cooling pond 40.On the rising pipe of cooling pond 40, have variable valve 41, it controls by temperature sensor 42,43, and variable valve 41 controls cool water pipe flow area, ensure that the washing slag water temperature drop scope that temperature sensor 42,43 records is 3-5 DEG C, can ensure that washing slag water lift pump 45 does not produce cavitation.
In washing slag water radiator 30, have a water level sensor 33, the signal that it provides, for controlling the inlet regulating valve 31 of washing slag water radiator, ensures at the washing slag water radiator internal water accumulation water surface in the altitude range of regulation.
Recirculated water heat absorber 20 is above washing slag water radiator 30, and the steam that washing slag water radiator 30 produces, enters recirculated water heat absorber 20 by vapour passage 34.There is the circulating water inlet that heats the top of recirculated water heat absorber 20, circulating water inlet there are inlet regulating valves 21, inlet regulating valves 21 by the control of the water level sensor 23 in recirculated water heat absorber, to ensure that water accumulation level in recirculated water heat absorber is in specialized range.
Recirculated water sprays from top to bottom in recirculated water heat absorber 20, and the washing slag water steam ascension from bottom to top of coming in from bottom, the two meets in recirculated water heat absorber internal space, and close contact, steam is dissolved in rapidly undersaturated recirculated water, and the heat of steam improves circulating water temperature.By warmed-up heating recirculated water in recirculated water heat absorber 20, flowed out by recirculated water heat absorber rising pipe, recirculated water heat absorber rising pipe has lift pump 46.
Above recirculated water heat absorber 20, there are an air collector 10 and vacuum pump 12, constantly extract the noncondensable gas comprised in the system of washing slag water radiator and recirculated water heat absorber out, it is exactly mainly the gas dissolved that washing slag water and recirculated water are separated out, and leaked-in air in system, thus intrasystem vacuum tightness can be ensured.
Fig. 3 gives the washing slag water radiator structure () of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
The washing slag water radiator 30 of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment, its profile is a pressurized vessel stood up, and its structure comprises: cylindrical shell, vapour passage 34, water inlet pipe 36, traverse baffle 39, ponding room 38, water level sensor 33 and rising pipe 37.
Hot washing slag water enters washing slag water radiator 30 by washing slag water radiator water inlet pipe 36, and washing slag water radiator water inlet pipe has inlet regulating valve.After hot washing slag water enters washing slag water radiator 30, along the tortuous passageway of Multi-level deflector plate 39, landing downwards step by step.Pressure in washing slag water radiator 30 lower than saturation pressure corresponding to import hot washing slag water temperature, so washing slag water evaporates after entering washing slag water radiator at once.The steam that washing slag water produces, by steam-pipe 34, upwards enters recirculated water heat absorber., there is a water deflector cover top of steam-pipe 34, and water deflector cover can prevent the recirculated water that recirculated water heat absorber space is dripped from can not fall into washing slag water radiator, and washing slag water radiator is unaffected to recirculated water heat absorber delivering vapor.
Remaining saturated washing slag water in washing slag water radiator 30, flows out from the water shoot 37 of bottom, mixes, become unsaturated water with the part cold water of cooling pond, then discharges through lift pump, and sends flushing cinder pond back to.
In washing slag water radiator 30, have a water level sensor 33, the signal that it provides, for controlling the water inlet automatic regulating valve of washing slag water radiator, ensures at washing slag water radiator inner product hydroecium 38 water surface in the altitude range of regulation
Fig. 4 gives the washing slag water radiator structure (two) of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
The washing slag water radiator 30 of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment, its profile is a pressurized vessel stood up, and its structure comprises: cylindrical shell, vapour passage 34, water inlet pipe 36, water spraying tray 32, ponding room 38, water level sensor 33 and rising pipe 37.
Hot washing slag water enters washing slag water radiator 30 by washing slag water radiator water inlet pipe 36, and washing slag water radiator water inlet pipe has inlet regulating valve.After hot washing slag water enters washing slag water radiator 30, along the tortuous passageway of multistage water spraying tray 32,000 hundred leaking holes, trickle down downwards step by step, very large surface-area can be had.Pressure in washing slag water radiator 30 lower than saturation pressure corresponding to import hot washing slag water temperature, so washing slag water evaporates after entering washing slag water radiator at once.The steam that washing slag water produces, by steam-pipe 34, upwards enters recirculated water heat absorber., there is a water deflector cover top of steam-pipe 34, and water deflector cover can prevent the recirculated water that recirculated water heat absorber space is dripped from can not fall into washing slag water radiator, and washing slag water radiator is unaffected to recirculated water heat absorber delivering vapor.
Remaining saturated washing slag water in washing slag water radiator 30, flows out from the water shoot 37 of bottom, mixes, become unsaturated water with the part cold water of cooling pond, then discharges through lift pump, and sends flushing cinder pond back to.
In washing slag water radiator 30, have a water level sensor 33, the signal that it provides, for controlling the water inlet automatic regulating valve of washing slag water radiator, ensures at washing slag water radiator inner product hydroecium 38 water surface in the altitude range of regulation
Fig. 5 gives the washing slag water radiator structure (three) of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
The washing slag water radiator 30 of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment, its profile is a pressurized vessel stood up, and its structure comprises: cylindrical shell, vapour passage 34, water inlet pipe 36, water jet standpipe 35, ponding room 38, water level sensor 33 and rising pipe 37.
Hot washing slag water enters washing slag water radiator 30 by washing slag water radiator water inlet pipe 36, and washing slag water radiator water inlet pipe has inlet regulating valve.Hot washing slag water enters washing slag water radiator 30, along being close to washing slag water radiator cylinder inboard wall, circle round 1,100 spout holes of downward water jet standpipe 35, spray to inner barrel space fierceness, article 1100, water column is woven into the network of rivers, a space in washing slag water radiator internal space, and trickle down downwards, very large surface-area can be had.Pressure in washing slag water radiator 30 lower than saturation pressure corresponding to import hot washing slag water temperature, so washing slag water evaporates after entering washing slag water radiator at once.The steam that washing slag water produces, by steam-pipe 34, upwards enters recirculated water heat absorber., there is a water deflector cover top of steam-pipe 34, and water deflector cover can prevent the recirculated water that recirculated water heat absorber space is dripped from can not fall into washing slag water radiator, and washing slag water radiator is unaffected to recirculated water heat absorber delivering vapor.
Remaining saturated washing slag water in washing slag water radiator 30, flows out from the water shoot 37 of bottom, mixes, become unsaturated water with the part cold water of cooling pond, then discharges through lift pump, and sends flushing cinder pond back to.
In washing slag water radiator 30, have a water level sensor 33, the signal that it provides, for controlling the water inlet automatic regulating valve of washing slag water radiator, ensures at washing slag water radiator inner product hydroecium 38 water surface in the altitude range of regulation
Fig. 6 gives the recirculated water heat absorber structure () of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
The recirculated water heat absorber structure of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment, its profile is a pressurized vessel, and its structure comprises: cylindrical shell, effuser 22, water inlet pipe 26, traverse baffle 25, water deflector cover 24, water level sensor 23 and rising pipe 27.
Recirculated water heat absorber 20 is above washing slag water radiator, and the steam that washing slag water radiator produces, by vapour passage 34, walks around vapour passage lid 24, enter recirculated water heat absorber 20.There is heating circulating water inlet 26 top of recirculated water heat absorber 20, circulating water inlet there is a water inlet automatic regulating valve, water inlet automatic regulating valve by the control of the water level sensor 23 in recirculated water heat absorber, to ensure that ponding room water level in recirculated water heat absorber is in specialized range.
Recirculated water enters recirculated water heat absorber 20, along the tortuous passageway of Multi-level deflector plate 25, trickle step by step, spray downwards at traverse baffle 25 edge at different levels as similar waterfall from top to bottom, and from the washing slag water steam that lower steam passage 34 comes, get around water deflector cover 24, ascension from bottom to top, the two meets in recirculated water heat absorber internal space, and close contact, steam is dissolved in rapidly undersaturated recirculated water, and the heat of steam improves circulating water temperature.
By warmed-up heating recirculated water in recirculated water heat absorber 20, finally fall into ponding room, flowed out by recirculated water heat absorber sidewall rising pipe 27, recirculated water heat absorber rising pipe has lift pump.The noncondensable gas of accumulation in recirculated water heat absorber 20, through effuser 22, is extracted out by vacuum pump, is discharged in air.
Fig. 7 gives the recirculated water heat absorber structure (two) of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
The recirculated water heat absorber structure of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment, its profile is a pressurized vessel, and its structure comprises: cylindrical shell, effuser 22, water inlet pipe 26, water spraying tray 28, water deflector cover 24, water level sensor 23 and rising pipe 27.
Recirculated water heat absorber 20 is above washing slag water radiator, and the steam that washing slag water radiator produces, by vapour passage 34, walks around water deflector cover 24, enter recirculated water heat absorber 20.There is heating circulating water inlet 26 top of recirculated water heat absorber 20, circulating water inlet there is a water inlet automatic regulating valve, water inlet automatic regulating valve by the control of the water level sensor 23 in recirculated water heat absorber, to ensure that ponding room water level in recirculated water heat absorber is in specialized range.
Recirculated water enters recirculated water heat absorber 20, along the tortuous passageway of 1,100 leaking holes of multistage water spraying tray 28, trickles down downwards step by step as heavy rain, can have very large surface-area.The steam that washing slag water produces, by steam-pipe 34, upwards enters recirculated water heat absorber., there is a water deflector cover 24 top of steam-pipe 34, and water deflector cover 24 can prevent the recirculated water that recirculated water heat absorber space is dripped from falling into washing slag water radiator, and washing slag water radiator is unaffected to recirculated water heat absorber delivering vapor.
From the washing slag water steam that lower steam passage 34 comes, ascension from bottom to top, with recirculated water unrestrained downwards, in recirculated water heat absorber internal space, reverse convection meets, and close contact, steam is dissolved in rapidly undersaturated recirculated water, and the heat of steam improves circulating water temperature.
By warmed-up heating recirculated water in recirculated water heat absorber 20, finally fall into ponding room, flowed out by recirculated water heat absorber sidewall rising pipe 27, recirculated water heat absorber rising pipe has lift pump.The noncondensable gas of accumulation in recirculated water heat absorber 20, through effuser 22, is extracted out by vacuum pump, is discharged in air.
Fig. 8 gives the recirculated water heat absorber structure (three) of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
The recirculated water heat absorber structure of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment, its profile is a pressurized vessel, and its structure comprises: cylindrical shell, effuser 22, water inlet pipe 26, water jet standpipe 29, water deflector cover 24, water level sensor 23 and rising pipe 27.
Recirculated water heat absorber 20 is above washing slag water radiator, and the steam that washing slag water radiator produces, by vapour passage 34, walks around water deflector cover 24, enter recirculated water heat absorber 20.There is heating circulating water inlet 26 top of recirculated water heat absorber 20, circulating water inlet there is a water inlet automatic regulating valve, water inlet automatic regulating valve by the control of the water level sensor 23 in recirculated water heat absorber, to ensure that ponding room water level in recirculated water heat absorber is in specialized range.
Recirculated water enters recirculated water heat absorber 20, from 1,100 spout holes being close to the water jet standpipe 29 that cylinder inboard wall circles round downward, spray to inner barrel space fierceness, article 1100, water column is woven into a dense network of rivers, space in recirculated water heat absorber internal space, trickle down downwards as violent storm, very large surface-area can be had.The steam that washing slag water produces, by steam-pipe 34, upwards enters recirculated water heat absorber., there is a water deflector cover 24 top of steam-pipe 34, and water deflector cover 24 can prevent the recirculated water that recirculated water heat absorber space is dripped from falling into washing slag water radiator, and washing slag water radiator is unaffected to recirculated water heat absorber delivering vapor.
From the washing slag water steam that lower steam passage 34 comes, ascension from bottom to top, with recirculated water unrestrained downwards, in recirculated water heat absorber internal space, reverse convection meets, and close contact, steam is dissolved in rapidly undersaturated recirculated water, and the heat of steam improves circulating water temperature.
By warmed-up heating recirculated water in recirculated water heat absorber 20, finally fall into ponding room, flowed out by recirculated water heat absorber sidewall rising pipe 27, recirculated water heat absorber rising pipe has lift pump.The noncondensable gas of accumulation in recirculated water heat absorber 20, through effuser 22, is extracted out by vacuum pump, is discharged in air.
Fig. 9 gives the deaeration device structure iron of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
The deaeration device of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment comprises: air collector 10, reverse checkvalve 11, vacuum pump 12, temperature sensor 14,15 and controller 16.
Above recirculated water heat absorber 20, air collector 10 is connected by effuser 22, the escape pipe of air collector 10 connects vacuum pump 12, constantly extract the noncondensable gas comprised in the system of washing slag water radiator and recirculated water heat absorber out, it is exactly mainly the gas dissolved that washing slag water and recirculated water are separated out, and leaked-in air in system, thus intrasystem vacuum tightness can be ensured.
The controlled device 16 of opening and closing of vacuum pump 12 controls, and controller 16 gathers the numerical value of the temperature sensor 14 on air collector 10 and the temperature sensor 15 on recirculated water heat absorber at any time.When both temperature difference are greater than prescribed value, controller 16 just starts vacuum pump 12, stops without temperature difference.Its principle is, vapor condenses in air collector, and air accumulation is more, and accumulation air dividing potential drop is higher, and vapor partial pressure declines, and air collector wall temperature just declines.
Figure 10 gives the anti cavitation device structure iron of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment.
The anti cavitation device of Steel Plant of the present invention washing slag water heat-energy recovering apparatus embodiment comprises: cooling pond 40, cooling pond water inlet pipe 47, cooling pond rising pipe, automatic regulating valve 41, temperature sensor 42,43 and washing slag water radiator lift pump 45.
Remaining saturated washing slag water in washing slag water radiator 30, flows out from the water shoot 37 of bottom, mixes with the part cold water from cooling pond 40, and cooling becomes unsaturated water, then discharges through lift pump 45, and sends flushing cinder pond back to.On the rising pipe of cooling pond 40, there is automatic regulating valve 41, the temperature signal of its collecting temperature sensor 42,43, automatically regulate cool water pipe flow area, the washing slag water temperature drop scope of guarantee temperature sensor 42,43 measuring point is 3-5 DEG C, can ensure that washing slag water lift pump 45 does not produce cavitation.
Claims (10)
1. Steel Plant's washing slag water heat energy recovering method, it is made up of the following step:
(1) washing slag water flows into heat-energy recovering apparatus from flushing cinder pond; (2) circulation water for heating flows into heat-energy recovering apparatus; (3) in heat-energy recovering apparatus, high temperature washing slag water is to cold cycle heat transfer water; (4) circulation water for heating heated up flows out heat-energy recovering apparatus, to user's heat supply; (5) washing slag water of having lowered the temperature flows out heat-energy recovering apparatus, return to flushing cinder pond, the method is characterized in that: washing slag water flows into heat-energy recovering apparatus flash distillation and produces steam, vapor condenses, in the circulation water for heating flowing into heat-energy recovering apparatus, makes recirculated water heat up.
2. Steel Plant's washing slag water heat-energy recovering apparatus, its primary structure comprises: washing slag water radiator, recirculated water heat absorber, deaeration device, anti cavitation device and lift pump, washing slag water is lowered the temperature in the heat release of washing slag water radiator, circulation water for heating absorbs heat intensification in recirculated water heat absorber, deaeration device picks out above recirculated water heat absorber, anti cavitation device to be connected on washing slag water radiator rising pipe before lift pump, it is characterized in that:
(1) said washing slag water radiator is washing slag water flasher;
(2) said recirculated water heat absorber is carbonated drink contact circulating water heating hydrophone;
(3) its structure also comprises: in the middle of washing slag water radiator and recirculated water heat absorber, have the vapour passage of a washing slag water.
3. according to Steel Plant according to claim 2 washing slag water heat-energy recovering apparatus, it is characterized in that: the structure of described washing slag water radiator comprises: cylindrical shell, vapour passage, water inlet pipe, traverse baffle, ponding room, water level sensor and rising pipe, washing slag water enters washing slag water radiator by water inlet pipe, along the tortuous passageway of Multi-level deflector plate, flow downward step by step, flash distillation simultaneously produces steam, steam upwards enters recirculated water heat absorber by vapour passage, remaining saturated washing slag water flows out from the rising pipe of bottom, in washing slag water radiator, there is a water level sensor, the signal that it provides passes to the automatic regulating valve of water inlet pipe, control the ponding room water surface in the altitude range of regulation.
4. according to Steel Plant according to claim 2 washing slag water heat-energy recovering apparatus, it is characterized in that: the structure of described washing slag water radiator comprises: cylindrical shell, vapour passage, water inlet pipe, water spraying tray, ponding room, water level sensor and rising pipe, washing slag water enters washing slag water radiator by water inlet pipe, along the tortuous passageway of multistage water spraying tray 1,100 leaking holes, trickle down downwards step by step, flash distillation simultaneously produces steam, steam upwards enters recirculated water heat absorber by vapour passage, remaining saturated washing slag water flows out from the rising pipe of bottom, in washing slag water radiator, there is a water level sensor, the signal that it provides passes to the automatic regulating valve of water inlet pipe, control the ponding room water surface in the altitude range of regulation.
5. according to Steel Plant according to claim 2 washing slag water heat-energy recovering apparatus, it is characterized in that: the structure of described washing slag water radiator comprises: cylindrical shell, vapour passage, water inlet pipe, water jet standpipe, ponding room, water level sensor and rising pipe, washing slag water enters washing slag water radiator by water inlet pipe, to circle round 1,100 spout holes of downward water jet standpipe from being close to cylinder inboard wall, spray to inner barrel space fierceness, flash distillation simultaneously produces steam, steam upwards enters recirculated water heat absorber by vapour passage, remaining saturated washing slag water flows out from the rising pipe of bottom, in washing slag water radiator, there is a water level sensor, the signal that it provides passes to the automatic regulating valve of water inlet pipe, control the ponding room water surface in the altitude range of regulation.
6. according to Steel Plant according to claim 2 washing slag water heat-energy recovering apparatus, it is characterized in that: the structure of described recirculated water heat absorber comprises: cylindrical shell, effuser, water inlet pipe, traverse baffle, water deflector cover, water level sensor and rising pipe, recirculated water enters recirculated water heat absorber from water inlet pipe, along the tortuous passageway of Multi-level deflector plate, trickle downwards step by step, from the washing slag water steam that bottom steam passage is come in, get around water deflector cover, ascension from bottom to top, the two meets in recirculated water heat absorber internal space, steam is dissolved in undersaturated recirculated water, improve circulating water temperature, last recirculated water is flowed out by rising pipe, a water level sensor is arranged at cylindrical shell bottom, water level signal passes to the automatic regulating valve on water inlet pipe, to control cylindrical shell accumulating at lower part hydroecium water level in specialized range, the noncondensable gas of recirculated water heat absorber cylinder cylinder accumulation, be discharged in air through effuser.
7. according to Steel Plant according to claim 2 washing slag water heat-energy recovering apparatus, it is characterized in that: the structure of described recirculated water heat absorber comprises: cylindrical shell, effuser, water inlet pipe, water spraying tray, water deflector cover, water level sensor and rising pipe, recirculated water enters recirculated water heat absorber from water inlet pipe, 1,100 leaking holes along multistage water spraying tray are trickled down downwards, from the washing slag water steam that bottom steam passage is come in, get around water deflector cover, ascension from bottom to top, the two meets in recirculated water heat absorber internal space, steam is dissolved in undersaturated recirculated water, improve circulating water temperature, last recirculated water is flowed out by rising pipe, a water level sensor is arranged at cylindrical shell bottom, water level signal passes to the automatic regulating valve on water inlet pipe, to control cylindrical shell accumulating at lower part hydroecium water level in specialized range, the noncondensable gas of recirculated water heat absorber cylinder cylinder accumulation, be discharged in air through effuser.
8. according to Steel Plant according to claim 2 washing slag water heat-energy recovering apparatus, it is characterized in that: the structure of described recirculated water heat absorber comprises: cylindrical shell, effuser, water inlet pipe, water jet standpipe, water deflector cover, water level sensor and rising pipe, recirculated water enters recirculated water heat absorber from water inlet pipe, to circle round 1,100 spout holes of downward water jet standpipe from being close to cylinder inboard wall, spray to inner barrel space fierceness, from the washing slag water steam that bottom steam passage is come in, get around water deflector cover, ascension from bottom to top, the two meets in recirculated water heat absorber internal space, steam is dissolved in undersaturated recirculated water, improve circulating water temperature, last recirculated water is flowed out by rising pipe, a water level sensor is arranged at cylindrical shell bottom, water level signal passes to the automatic regulating valve on water inlet pipe, to control cylindrical shell accumulating at lower part hydroecium water level in specialized range, the noncondensable gas of recirculated water heat absorber cylinder cylinder accumulation, be discharged in air through effuser.
9. according to Steel Plant according to claim 2 washing slag water heat-energy recovering apparatus, it is characterized in that: the structure of described deaeration device comprises: air collector, reverse checkvalve, vacuum pump, temperature sensor and controller, the air collector of deaeration device passes through effuser, be connected to the top of recirculated water heat absorber, the escape pipe of air collector connects vacuum pump, reverse checkvalve is had before vacuum pump, the noncondensable gas comprised in the system of washing slag water radiator and recirculated water heat absorber extracted out by vacuum pump, the opening and closing of vacuum pump is controlled by the controller, controller gathers the numerical value of the temperature sensor on air collector and recirculated water heat absorber at any time, when both temperature difference are greater than prescribed value, just start vacuum pump, stop without temperature difference.
10. according to Steel Plant according to claim 2 washing slag water heat-energy recovering apparatus, it is characterized in that: the structure of described anti cavitation device comprises: cooling pond, water inlet pipe, rising pipe, automatic regulating valve, temperature sensor and lift pump, the saturated washing slag water of washing slag water radiator flows out from water shoot, mix with the cold water come from cooling pond rising pipe, cooling becomes unsaturated water, extract out through lift pump again, on the rising pipe of cooling pond, there is automatic regulating valve, it gathers the temperature sensor signal of on water shoot 2, automatic adjustment cool water pipe flow area, in control water shoot, washing slag water is before entering lift pump, blending cold water cooling 3-5 DEG C, ensure that washing slag water lift pump does not produce cavitation.
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| CN104515176B (en) * | 2013-10-01 | 2018-10-30 | 黑龙江省金永科技开发有限公司 | Hot water circuit converter |
| CN105091408B (en) * | 2014-05-23 | 2018-03-30 | 哈尔滨工大金涛科技股份有限公司 | Steam jet heat pump |
| CN105091409B (en) * | 2014-05-23 | 2018-03-30 | 哈尔滨工大金涛科技股份有限公司 | Through type heat pump |
| CN104212923B (en) * | 2014-08-15 | 2016-05-11 | 青岛理工大学 | Low-pressure coil type flash evaporation device and flash evaporation method |
| CN109987663B (en) * | 2017-12-29 | 2023-06-16 | 东方电气集团东方锅炉股份有限公司 | Low-temperature hot water flash evaporation device and flash evaporation method |
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