CN205188319U - Online negative pressure dewatering system of blast furnace grain slag - Google Patents
Online negative pressure dewatering system of blast furnace grain slag Download PDFInfo
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- CN205188319U CN205188319U CN201520959614.2U CN201520959614U CN205188319U CN 205188319 U CN205188319 U CN 205188319U CN 201520959614 U CN201520959614 U CN 201520959614U CN 205188319 U CN205188319 U CN 205188319U
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- slag
- sealing coat
- grain slag
- blast furnace
- dewatering system
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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
- 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 utility model belongs to the technical field of the slag is handled, concretely relates to blast furnace grain slag dewatering system. The utility model discloses a blast furnace grain slag dewatering system, including the grain slag ditch of establishing ties in proper order, granulation tower, the grain slag pond that the top has the nozzle, the grain slag pond in the lower part have the isolator, the export in grain slag pond be connected with the suction pump through suction duct, the suction pump is established ties through the pipeline in proper order has the heat exchanger, the cistern, towards the pulp water pump, dash and be connected through the pipeline between pulp water pump and the granulation tower upper portion. The utility model discloses a dewatering system sets up the isolator in the grain slag pond, come slag in the slag -water slurry and separation of water, reaches the purpose of grain slag dehydration. Adopt the utility model discloses a system has shortened the processing time of grain slag, has alleviateed worker labor intensity, in dehydration process, can carry out recycle to the pulp water heat moreover, has practiced thrift the energy consumption.
Description
Technical field
The utility model belongs to grain slag processing technology field, is specifically related to a kind of blast furnace granulated slag dewatering system, also relates to above-mentioned blast furnace granulated slag dewatering.
Background technology
In the processes such as ironmaking and copper metallurgy, nickel, lead, zinc, can produce the slag of a large amount of high temperature fused states, the treatment process of these slags roughly has two kinds: a kind of is traditional grain slag water quenching and natural cooling; Two is the broken and evaporations of Bao Er Water Company of Luxembourg grain slag water.These grain slags are former is a kind of waste produced in smelting, but if select water quenching process, the heat of grain slag just can be made to be fully utilized, turn waste into wealth.
Adopt above-mentioned grain slag water quenching, after grain slag dehydration, because the water ratio of grain slag is higher, can not transport immediately, in order to avoid the sewage in transport road in grain slag spills on road surface, affect environmental health, therefore, need to arrange control water grain slag field, grain slag is placed in grain slag field control water and reaches requirement to the water ratio of grain slag and just can be transported to other place, can not realize disposablely online completing dehydration in grain slag control water process, reach moisture requirement and directly to set out on a journey transport.
Mainly there is following defect in above-mentioned grain slag treatment process:
1, control grain slag field floor space large, the control water time is long, meets wind and plays dust pollution environment;
2, dewatering system maintenance is large, and labor strength is large, and running cost is high;
3, the calorific loss of washing slag water in dehydration, heat energy is not all recycled.
Method conventional is at present that grain slag is delivered to water slag groove, then delivers to the condensation of granulation tower, is expelled to granulating pit, then is delivered to grain slag field control water.Above-mentioned system and method, still can not solve moisture content height in grain slag needs special grain slag field to grain slag control water problem.
The people such as Wang Maohua deliver " Treating Methods for BF Slag " in the 2nd phase in 2006 total 338th phase " Anshan iron and steel plant technology ", disclose in this article, end filter method is adopted to process blast furnace slag, its technical process is: after the high pressure water that blast furnace slag is sprayed by porous nozzle in Punched box carries out shrend, Water Quenching Slag flows through shot tank and enters detritus pool, grain slag in detritus pool is caught by grab bucket and is deposited in the continuation dehydration of dry slag field, water in detritus pool and suspended substance flow into filtering basin by channel of allocation, gravel packing is laid in filtering basin, and establish shaped steel to protect, washing slag water after filtration is reused after header is pressurizeed the cooling of feeding cooling tower by pump.
In above-mentioned method, it is leave production line that grain slag is separated, and be deposited in the dehydration of dry slag field, the speed of dehydration is still slow, generally needs the time of 3-4 days.
Therefore, need to improve for above-mentioned defect, do not change existing iron-smelting process, do not affect ironmaking production prerequisite under, conventional treatment process method that grain slag is dewatered (slag bath filtration, rotary drum dehydration, dehydration slot type, lifting evaporation etc.), transform online negative pressure processed technique as, existing utility is utilized to design a set of can effectively dehydration on a production line to grain slag, adopt isolation method to make grain slag rapid dehydration reach certain water ratio, be directly convenient to the system of transporting (grain slag does not drip).
Summary of the invention
In order to solve above-mentioned technical problem, the utility model provides a kind of system fast grain slag being carried out online negative pressure dehydration;
The utility model additionally provides the method adopting above-mentioned dewatering system to dewater to grain slag.
Grain slag dewatering system of the present utility model solves above technical problem by following technical scheme:
Grain slag dewatering system of the present utility model comprise connect successively water slag groove, top is with granulation tower, the granulating pit of nozzle, water slag groove is connected with the import of granulation tower, the granulation outlet of tower is connected with the import of granulating pit, in granulating pit, shield retaining is arranged at bottom, and shield retaining comprises separation net and is positioned at the three layers of sealing coat be made up of solid filler below separation net; The outlet of granulating pit is connected with water suction pump by suction piping, and water suction pump is in series with interchanger, water reservoir, slag-washing-out pump successively by pipeline, is connected between slag-washing-out pump with granulation tower top by pipeline.
The area of shield retaining is identical with the area of granulating pit.
Shield retaining is positioned at below the import of granulating pit, and shield retaining top has below separation net, separation net and has three layers of sealing coat.
Three layers of sealing coat comprise the sealing coat I, sealing coat II and the sealing coat III that arrange from top to bottom successively.
The thickness of sealing coat I is 30-50cm, and the thickness of sealing coat II is 40-60cm, and the thickness of sealing coat III is 50-70cm.
Being the solid filler of diameter 50mm in sealing coat I, is the solid filler of diameter 70mm in sealing coat II; It is the solid filler of diameter 90mm in described sealing coat III.
Solids in three layers of sealing coat is at least one in steel ball, nylon ball, pebbles.
The material of separation net is DN50 steel pipe, and separation net is square frame-shaped fenestral fabric, and the specification of grid is 1m × 1m.
The online negative pressure dewatering system of above-mentioned blast furnace granulated slag carries out the method for dewatering, and comprises following step:
Blast furnace granulated slag flows through water slag groove and the import of granulation tower; enter granulation tower bottom; the grain slag of nozzle to granulation tower bottom of granulation top of tower smashes, quenching; slag-water slurry after quenching exports in inflow granulating pit by being granulated tower; grain slag passes through shield retaining; water in grain slag is evacuated to interchanger heat exchange by water suction pump, enters water reservoir after cooling, and the water in water reservoir sprays quenching cycling use of water to granulation tower as granulation tower by slag-washing-out pump pump.
When grain slag water ratio≤12% in granulating pit, grain slag is taken out.
By above-mentioned structure design, do not need to build control grain slag field, simple to operate, alleviate labor strength, grain slag realizes disposablely online completing dehydration, reaches moisture requirement and directly to set out on a journey transport.Finally realize energy-conservation, reduce discharging, safety in production, thoroughly change the dehydration of traditional grain slag and complete in control grain slag field, and control grain slag field floor space is large, the control water time is long, the drawback of contaminate environment.Both reduce running cost, realize again the object of heat energy recycle.
The beneficial effects of the utility model are, adopt dewatering system of the present utility model and dewatering, in granulating pit, shield retaining is set, and by water suction pump to the water negative pressure absorbing in the slag-water slurry above sealing coat, slag in slag-water slurry and water are separated, reach the object of grain slag dehydration, it is high and cause it not transport in time that the utility model well solves grain slag water ratio, need special grain slag field control water problem, do not changing in ironmaking original production process, realize grain slag fast dewatering in production line to complete, substantially reduce the treatment time of grain slag dehydration, alleviate manual labor's intensity, and in dehydration, can recycle pulp water heat, save energy consumption.
Accompanying drawing explanation
Fig. 1 is dewatering system structural representation of the present utility model;
Fig. 2 is the schematic diagram that dewatering system of the present utility model runs;
Fig. 3 is the structural representation of shield retaining of the present utility model;
In figure, 1-water slag groove, 2-is granulated tower, 3-granulating pit; 4-shield retaining, 5-water suction pump, 6-interchanger, 7-water reservoir; 8-slag-washing-out pump, 9-nozzle, 10-is granulated tower import; 11-is granulated tower outlet, the import of 12-granulating pit, and 13-granulating pit exports; 14-grain slag, 15-separation net, 16-sealing coat I; 17-sealing coat II, 18-sealing coat III, 19-chimney.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described, so that those skilled in the art more understands the utility model, but does not limit the utility model with this.
Blast furnace granulated slag dewatering system of the present utility model, comprise connect successively water slag groove 1, top is with granulation tower 2, the granulating pit 3 of nozzle 9, water slag groove 1 is connected with granulation tower import 10, granulation tower outlet 11 is connected with granulating pit import 12, in granulating pit 3, shield retaining 4 is arranged at bottom, and shield retaining 4 is made up of separation net 15 and three layers of sealing coat, and the material of separation net 15 is DN50 steel pipes, separation net 15 is in square frame-shaped fenestral fabric, and the specification of grid is 1m × 1m; Granulating pit outlet 13 is connected with water suction pump 5 by pipeline, and water suction pump 5 is in series with interchanger 6, water reservoir 7, slag-washing-out pump 8 successively by pipeline, is connected between slag-washing-out pump 8 with granulation tower 2 top by pipeline.
The area of shield retaining 4 is identical with the area of granulating pit 3.
Shield retaining 4 is positioned at below granulating pit import 12, and shield retaining 4 is positioned at the top of granulating pit outlet 13.
Three layers of sealing coat from top to bottom the first layer sealing coat I 16 is the solids of diameter 50 millimeter, and second layer sealing coat II 17 is the solids of diameter 70 millimeter, and third layer sealing coat III 18 is the solids of diameter 90 millimeter.
The thickness of sealing coat I is 40cm, and the thickness of sealing coat II is 50cm, and the thickness of sealing coat III is 60cm.
Above-mentioned solids is at least one in steel ball, nylon ball, pebbles, can the solids of Selective filling as the case may be.
Blast furnace granulated slag 14 flows through water slag groove 1 and the import of granulation tower 2; enter bottom granulation tower 2; the nozzle 9 at granulation tower 2 top smashes the grain slag bottom granulation tower 2, quenching; under the effect of high pressure water; warm sludge is broken at Shui Zhongshui; slag-water slurry after quenching exports in 11 inflow granulating pits 3 by being granulated tower; granulating pit 3 is by shield retaining 4; water in slag-water slurry above shield retaining 4 is evacuated to interchanger 6 heat exchange by water suction pump 5; be delivered to water reservoir 7 after cooling, the water in water reservoir 7 sprays quenching water to granulation tower 2 as granulation tower 2 by slag-washing-out pump 8 pump.Through interchanger 6 heat exchange, using heat in order to central heating or as follow-up production use, can compare with existing grain slag processing mode, saved energy consumption.
Water vapor in granulation tower 2 is discharged by the chimney 19 at its top.
When grain slag water ratio≤12% in granulating pit 3, grain slag is picked up, can directly transport.
Comparative example 1
If sealing coat is set to from top to bottom: sealing coat II, sealing coat I, sealing coat III; It is the solid filler of diameter about 50mm in sealing coat I; It is the solid filler of diameter about 70mm in sealing coat II; It is the solid filler of diameter about 90mm in sealing coat III.Namely change the position of sealing coat, in every layer of sealing coat the diameter of solid filler and thickness constant; Namely the thickness of sealing coat I is 40cm, and the thickness of sealing coat II is 50cm, and the thickness of sealing coat III is 60cm.
Due to sealing coat II is arranged on the top, along with the carrying out of isolation, slag can fill the space of the solid filler of sealing coat II, slows down the isolation speed of pulp water; Result shows, in comparative example 1, isolation time can 30-40% longer than embodiment 1.
Comparative example 2
If sealing coat is set to from top to bottom: sealing coat III, sealing coat II, sealing coat I; It is the solid filler of diameter about 50mm in sealing coat I; It is the solid filler of diameter about 70mm in sealing coat II; It is the solid filler of diameter about 90mm in sealing coat III.
Namely change the position of sealing coat, in every layer of sealing coat the diameter of solid filler and thickness constant; Result shows, in comparative example 2, isolation time can 50-60% longer than embodiment 1.
Comparative example 3
If sealing coat to be set to the thickness of 150cm, identical with embodiment 1 thickness, but only lay the solid filler that diameter is about 50mm in whole sealing coat; Dewater same slag, and the time in comparative example 3 is 1 hours; Longer than the time of embodiment 1.
Comparative example 4
If sealing coat to be set to the thickness of 150cm, identical with embodiment 1 thickness, but only lay the solid filler that diameter is about 70mm in whole sealing coat; Dewater same slag, and the time in comparative example 3 is 2 hours; Treatment time is longer than embodiment 1 far away.Analyzing, may be because solid filler diameter is comparatively large, the space of slag in isolation processes between the easy blocking of the carrying out along with isolation solid filler, thus slows down the speed of dehydration.
Comparative example 5
With comparative example 1 unlike, the thickness of sealing coat I 4 is set to about 25cm, and the thickness of sealing coat II 6 is about 30cm, the thickness of sealing coat III 7 is about 45cm, the thickness of whole sealing coat is 100cm, and the time of dehydration is 1.5 hours, also will be longer than the dewatering time in embodiment 1 far away.
As can be seen from above contrast, the setting of sealing coat of the present utility model be dewatering speed the most fast.Change the diameter of solid filler or the thickness of sealing coat, all can have an impact for dewatering speed.
Adopt system of the present utility model to after grain slag process, relative to original processing mode, the 72 hours original grain slag control water time is shortened to about 15 minutes by the utility model, process grain slag dewatering time is short, do not need grain slag field, grain slag dehydration after water ratio≤12%, direct Automobile Transportation, in transport, grain slag does not drip, running cost is low, stable, good reliability, in dehydration, the heat of washing slag water can be recycled, and is a kind of energy-saving environment protecting waste processed technique.
After the transformation of application the utility model, grain slag processing cost will significantly reduce, with 1750m
3blast furnace is example: save processing cost about 10.27 yuan/ton, energy efficient about 2000 tons mark coal.
The conventional treatment process method (as rotary drum evaporation) of grain slag dehydration, in use there is finished product grain slag water content too high, system cloud gray model, energy consumption are high, environment is poor, and maintenance cost is high, and the problem such as casualty ratio of accidents is all high, and labor strength is large.Because grain slag water content is higher, after entrucking, infiltration is on the way overflow and is spread seriously, and therefore need can transport after 2 ~ 3 days to dedicated storage yard control water, as this increased use and the secondary conveying cost in place, site environment is seriously polluted.Application the utility model can reduce grain slag facility operation and maintenance cost, environmental protect, and the source recycle of grain slag hydro-thermal, saves energy and reduce the cost further.Add guarantee with lower casualty ratio of accidents for blast fumance, beautify blast fumance environment.
Claims (8)
1. the online negative pressure dewatering system of blast furnace granulated slag, comprise connect successively water slag groove, top is with granulation tower, the granulating pit of nozzle, described water slag groove is connected with the import of granulation tower, the described outlet of granulation tower is connected with the import of granulating pit, it is characterized in that, in described granulating pit, shield retaining is arranged at bottom, and described shield retaining comprises separation net and is positioned at the three layers of sealing coat be made up of solid filler below separation net; The outlet of described granulating pit is connected with water suction pump by pipeline, and described water suction pump is in series with interchanger, water reservoir, slag-washing-out pump successively by pipeline, is connected between described slag-washing-out pump with granulation tower top by pipeline.
2. the online negative pressure dewatering system of a kind of blast furnace granulated slag as claimed in claim 1, it is characterized in that, the area of described shield retaining is identical with the area of granulating pit.
3. the online negative pressure dewatering system of a kind of blast furnace granulated slag as claimed in claim 1, is characterized in that, described separation net is positioned at below the import of granulating pit, and described separation net is positioned at the top of granulating pit outlet.
4. the online negative pressure dewatering system of a kind of blast furnace granulated slag as claimed in claim 1, is characterized in that, three layers of described sealing coat comprise the sealing coat I, sealing coat II and the sealing coat III that arrange from top to bottom successively.
5. the online negative pressure dewatering system of a kind of blast furnace granulated slag as claimed in claim 4, is characterized in that, the thickness of described sealing coat I is 30-50cm, and the thickness of described sealing coat II is 40-60cm, and the thickness of described sealing coat III is 50-70cm.
6. the online negative pressure dewatering system of a kind of blast furnace granulated slag as claimed in claim 4, is characterized in that, is the solid filler of diameter 40-60mm in described sealing coat I; It is the solid filler of diameter 60-80mm in described sealing coat II; It is the solid filler of diameter 80-100mm in described sealing coat III.
7. the online negative pressure dewatering system of a kind of blast furnace granulated slag as claimed in claim 1, is characterized in that, the solid filler in three layers of described sealing coat is at least one in steel ball, nylon ball, pebbles.
8. the online negative pressure dewatering system of a kind of blast furnace granulated slag as claimed in claim 1, is characterized in that, the material of described separation net is DN50 steel pipe, and described separation net is square frame-shaped fenestral fabric, and the specification of grid is 1m × 1m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520959614.2U CN205188319U (en) | 2015-11-27 | 2015-11-27 | Online negative pressure dewatering system of blast furnace grain slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520959614.2U CN205188319U (en) | 2015-11-27 | 2015-11-27 | Online negative pressure dewatering system of blast furnace grain slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205188319U true CN205188319U (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520959614.2U Expired - Fee Related CN205188319U (en) | 2015-11-27 | 2015-11-27 | Online negative pressure dewatering system of blast furnace grain slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205188319U (en) |
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2015
- 2015-11-27 CN CN201520959614.2U patent/CN205188319U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20171127 |