CN103771464B - A kind of flyash clinkersintering device - Google Patents
A kind of flyash clinkersintering device Download PDFInfo
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- CN103771464B CN103771464B CN201210397288.1A CN201210397288A CN103771464B CN 103771464 B CN103771464 B CN 103771464B CN 201210397288 A CN201210397288 A CN 201210397288A CN 103771464 B CN103771464 B CN 103771464B
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- cooler
- preheater
- heat exchanger
- hotblast stove
- sintering oven
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The present invention relates to coal ash clinkersintering device, particularly relate to one and be applied to clinkersintering device in " flyash-ammonium sulfate sintering process produces alumina technology ", solve exist in prior art be difficult to problems such as adapting to maximization production requirement, heat exchange efficiency is low, cost of manufacture is high.This device is provided with preheater, sintering oven, cooler, air heat exchanger, hotblast stove, dust collecting system, preheater is connected with sintering oven kiln tail, cooler and hotblast stove are connected with sintering oven kiln hood respectively, air heat exchanger is connected with cooler, hotblast stove and cooler dust collecting system respectively, preheater is connected with rotary kiln dust collecting system, and preheater, sintering oven, cooler, air heat exchanger, hotblast stove, dust collecting system are in a workshop.The present invention meeting and on the basis that produces of large industrialized, can not only avoid sintering and producing the loss of ammonia, and the heat in efficient recovery system, achieves energy-saving and cost-reducing.
Description
Technical field
The present invention relates to coal ash clinkersintering device, particularly relate to one and be applied to clinkersintering device in " flyash-ammonium sulfate sintering process produces alumina technology ".
Background technology
In " flyash-ammonium sulfate sintering process produces alumina technology " middle clinkersintering kiln, ammonium sulfate and flyash react and generate grog (main exsiccated ammonium alum and white residue) and ammonia, and this part ammonia needs to recycle.Once containing carbonic acid gas in thermal source, then in ammonia absorption system, carbonic acid gas can generate bicarbonate of ammonia with ammonia gas react, causes the loss of ammonia.
Have two kinds of corresponding sintering technologies at present, namely external heating type reacts " a kind of low temperature ammonia process flyash produces the sintering rotary kiln device of aluminum oxide " of kiln technology and patent 201120263968.5 proposition indirectly.
" indirect external heating type reaction kiln technology " adopts indirect external heating type to react klining powder process coal ash grog, and it is as follows to propose its advantage:
1, in indirect external heating type reaction kiln, the flue gas of fuel combustion does not contact with the ammonia in rotary kiln, can not cause the loss of ammonia.
2, the ammonia that the flue gas of fuel combustion does not produce with clinkersintering mixes, and reduces the burden of the latter linked ammonia absorption system of rotary kiln.
But show according to detailed research, indirect external heating type reaction klining powder process coal ash grog has following shortcoming:
1, adopt indirect external-heat to react kiln technology, due to kiln plant by outer hot jacket barrel structure and present stage equipment processing ability impact, inner core maximum specification is Φ 3.5m, is difficult to adapt to maximization production requirement.
2, indirectly the fuel flue gas of external-heat reaction kiln walks kiln outer sleeve, and in flue gas and kiln, raw material heat-transfer surface is kiln wall steel, and its heat exchange efficiency reacts kiln lower than internal heat type.
3, for ensureing that clinkersintering temperature reaches 500 DEG C, fuel flue-gas temperature is about 800 DEG C, and rotary kiln outer wall is ensure that effective heat exchange need adopt expensive high temperature steel, causes whole rotary kiln cost of manufacture high.
" a kind of low temperature ammonia process flyash produces the sintering rotary kiln device of aluminum oxide " that Chinese patent 201120263968.5 proposes proposes to adopt internal heat type kiln to prepare sintered clinker, but this technology still has following shortcoming:
1, raw material directly enter sintering oven and sinter, and cause sintering oven length long, be unfavorable for the application that large scale industry is produced because sintering time is long;
2, the grog sintered into directly enters stripping groove, higher owing to sintering rear clinker temperature, and stripping groove thermal discharge is large, and thermosteresis is large;
3, the flue gas of fuel combustion directly enters rotary kiln and reflects in rotary kiln that the ammonia of generation mixes, and owing to containing carbonic acid gas in fuel flue gas, the ammonia in ammonia absorption system can be caused to lose;
4, to go out the flue-gas temperature of rotary kiln high for this technique, but ammonia absorption system requires into flue-gas temperature low, and for solving this problem, the flue gas of rotary kiln must cooling down, can increase system thermosteresis like this.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of flyash clinkersintering device, what exist in solution prior art is difficult to problems such as adapting to maximization production requirement, heat exchange efficiency is low, cost of manufacture is high.
Technical scheme of the present invention is:
A kind of flyash clinkersintering device, this device is provided with preheater, sintering oven, cooler, air heat exchanger, hotblast stove, dust collecting system, preheater is connected with sintering oven kiln tail, cooler and hotblast stove are connected with sintering oven kiln hood respectively, air heat exchanger is connected with cooler, hotblast stove and cooler dust collecting system respectively, and preheater is connected with rotary kiln dust collecting system.
Described flyash clinkersintering device, preheater, sintering oven, cooler, air heat exchanger, hotblast stove, dust collecting system are in a workshop.
Described flyash clinkersintering device, raw material are placed in preheater, and preheater discharge port is connected with the kiln tail feed end of sintering oven, and the exhaust outlet of preheater is connected with cyclone.
Described flyash clinkersintering device, the kiln hood discharge end of sintering oven is connected with the import of cooler and the heating duct of hotblast stove, and cooler discharging is the grog sintered.
Described flyash clinkersintering device, the gas approach of air heat exchanger is connected with cooler exhaust outlet, and the exhanst gas outlet of air heat exchanger is connected with bagroom I.
Described flyash clinkersintering device, the fresh inlet of air heat exchanger directly connects air, and the new wind outlet of air heat exchanger is connected with the blast inlet of hotblast stove.
Described flyash clinkersintering device, the exhanst gas outlet of hotblast stove has two branch roads, and a branch road is connected with hotblast stove, for hotblast stove provides readjustment wind, another discharged gas fume.
Described flyash clinkersintering device, the fresh inlet of hotblast stove exports with the new wind of air heat exchanger and is connected, and the hot-blast outlet of hotblast stove is connected with sintering oven.
Described flyash clinkersintering device, dust collecting system is divided into two portions, is respectively rotary kiln dust collecting system and cooler dust collecting system.
Described flyash clinkersintering device, rotary kiln dust collecting system is provided with cyclone, bagroom II, blower fan II, gather dust warehouse, the inlet mouth of cyclone is connected with the exhaust outlet of preheater, the air outlet of cyclone is connected with the import of bagroom II, the outlet of bagroom II is connected with blower fan II, the outlet of blower fan II is connected with ammonia absorption system, and cyclone is all connected with the warehouse that gathers dust with the dust-exhausting port of bagroom II.
Described flyash clinkersintering device, cooler dust collecting system is provided with bagroom, blower fan and chimney, bagroom I import is connected with air heat exchanger, and the outlet of bagroom I is connected with the blast inlet of blower fan II, and the exhaust outlet of blower fan II is connected with chimney.
Described flyash clinkersintering device, the import of bagroom I is connected with air heat exchanger, and the outlet of bagroom I is connected with blower fan I, and the outlet of blower fan I connects air and arranged outward by hot blast.
Described flyash clinkersintering device, preheater is adverse current direct heat-exchanging type preheater.
Described flyash clinkersintering device, preheater is connected with sintering oven by tremie pipe, and the raw material after the tail gas of sintering oven and preheating all flow through tremie pipe.
Described flyash clinkersintering device, sintering oven is internal heat type rotary kiln.
Described flyash clinkersintering device, cooler is air-cooled direct heat-exchanging type cooler.
Described flyash clinkersintering device, is provided with water spray system outside cooler simultaneously, by the mode at cooler outer wall spray water, in conjunction with the mode of cold front heavy rain, is embodied as grog cooling in cooling cylinder.
Described flyash clinkersintering device, is provided with airlock between cooler and sintering oven.
Described flyash clinkersintering device, air heat exchanger is indirect heat exchange type interchanger.
Described flyash clinkersintering device, air heat exchanger is tubular air preheater or rotary regenerative air preheater.
Described flyash clinkersintering device, hotblast stove is indirect heat exchange type hotblast stove.
The present invention has the following advantages:
1, the present invention includes preheater, sintering oven, cooler, air heat exchanger, hotblast stove, dust collecting system, adopt indirect heating type hotblast stove to prepare hot air cleaning, the flue gas avoiding fuel combustion mixes the generation caused in ammonia loss with rotary kiln exhaust gas;
2, the present invention arranges preheater at kiln tail, and adopts rotary kiln exhaust gas preheated raw meal method to reclaim heat in tail gas, reduces the burden of ammonia absorption system simultaneously;
3, the present invention adopts direct heat-exchanging type sintering oven, effectively can not only be applied to large scale industry and produce, simultaneously thermo-efficiency height and indirect heating type sintering oven;
4, the present invention adopts cooler to cool grog, and the heat not only in efficient recovery grog, obtains low temp. material simultaneously, ensures that the next stage production of grog leaching is carried out smoothly;
5, the present invention has reclaimed the heat in cooler discharge hot blast, achieves energy-saving and cost-reducing.
6, the present invention is meeting and on the basis that produces of large industrialized, can not only avoid sintering and producing the loss of ammonia, and the heat in efficient recovery system, achieves energy-saving and cost-reducing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, preheater; 2, sintering oven; 3, cooler; 4, hotblast stove; 5, air heat exchanger; 6, bagroom I; 7, blower fan I; 8, cyclone; 9, bagroom II; 10, blower fan II; 11, gather dust warehouse; 12, ammonia absorption system.
Embodiment
Clinkersintering device during the present invention is applied to " flyash-ammonium sulfate sintering process produces alumina technology ", by preheater, sintering oven, cooler, air heat exchanger, hotblast stove, dust collecting system (cooler dust collecting system, rotary kiln dust collecting system) etc. composition, preheater, sintering oven, cooler, air heat exchanger, hotblast stove, dust collecting system is in a workshop, preheater is connected with sintering oven kiln tail, cooler and hotblast stove are connected with sintering oven kiln hood respectively, air heat exchanger respectively with cooler, hotblast stove is connected with cooler dust collecting system, preheater is connected with rotary kiln dust collecting system.
As shown in Figure 1, mainly comprise preheater 1, sintering oven 2, cooler 3, hotblast stove 4, air heat exchanger 5, bagroom I 6, blower fan I 7, cyclone 8, bagroom II 9, blower fan II 10, gather dust warehouse 11, ammonia absorption system 12 etc., concrete structure is as follows:
Raw material enter preheater 1, and preheater 1 discharge port is connected with the kiln tail feed end of sintering oven 2, and the exhaust outlet of preheater 1 is connected with cyclone 8;
The kiln hood discharge end of sintering oven 2 is connected with the heating duct of the import of cooler 3 and hotblast stove 4, and cooler 3 discharging is the grog sintered;
The gas approach of air heat exchanger 5 is connected with cooler 3 exhaust outlet, and the exhanst gas outlet of air heat exchanger 5 is connected with bagroom I 6; The fresh inlet of air heat exchanger 5 directly connects air, and the new wind outlet of air heat exchanger 5 is connected with the blast inlet of hotblast stove 4;
The exhanst gas outlet of hotblast stove 4 has two branch roads, and a branch road is connected with hotblast stove 4, for hotblast stove provides readjustment wind, and another discharged gas fume;
The fresh inlet of hotblast stove 4 exports with the new wind of air heat exchanger 5 and is connected, and the hot-blast outlet of hotblast stove 4 is connected with sintering oven 2.
In the present embodiment, dust collecting system is divided into two portions, is respectively rotary kiln dust collecting system and cooler dust collecting system.Wherein:
Described rotary kiln dust collecting system is made up of cyclone 8, bagroom II 9, blower fan II 10, the warehouse 11 that gathers dust, the inlet mouth of cyclone 8 is connected with the exhaust outlet of preheater 1, the air outlet of cyclone 8 is connected with the import of bagroom II 9, the outlet of bagroom II 9 is connected with blower fan II 10, the outlet of blower fan II 10 is connected with ammonia absorption system 12, and cyclone 8 is connected with the warehouse 11 that gathers dust with the dust-exhausting port of bagroom II 9;
Described cooler dust collecting system is made up of bagroom I 6, blower fan II 10 and chimney, bagroom I 6 import is connected with air heat exchanger 5, the outlet of bagroom I 6 is connected with the blast inlet of blower fan II 10, and the exhaust outlet of blower fan II 10 is connected with chimney.
The import of bagroom I 6 is connected with air heat exchanger 5, and the outlet of bagroom I 6 is connected with blower fan I 7, and the outlet of blower fan I 7 connects air and arranged outward by hot blast;
In the present embodiment, preheater 1 is adverse current direct heat-exchanging type preheater.
In the present embodiment, preheater 1 is connected with sintering oven 2 by tremie pipe, and the raw material after the tail gas of sintering oven 2 and preheating all flow through tremie pipe.
In the present embodiment, sintering oven 2 is internal heat type rotary kiln.
In the present embodiment, cooler 3 is air-cooled direct heat-exchanging type cooler.
In the present embodiment, outside cooler 3, water spray system can be provided with simultaneously, by the mode at cooler outer wall spray water, in conjunction with the mode of cold front heavy rain, grog cooling in cooling cylinder can be embodied as better.
In the present embodiment, between cooler 3 and sintering oven 2, be provided with airlock.
In the present embodiment, air heat exchanger 5 is indirect heat exchange type interchanger, and air heat exchanger can be tubular air preheater, also can be rotary regenerative air preheater.
In the present embodiment, hotblast stove 4 is indirect heat exchange type hotblast stove.
During flyash clinkersintering device of the present invention work, after flyash raw material enter preheater 1 and the heat exchange of sintering oven 2 tail gas, the raw material after preheating sinter grog in sintering oven 2.Grog after sintering enters cooler 3 and is sent into grog leaching workshop by after air cooling by transfer roller, after the hot blast that cooler 3 exhaust outlet is discharged enters air heat exchanger 5 cooling, outer row after cooler dust collecting system is gathered dust, enter hotblast stove 4 after the air that air heat exchanger 5 fresh inlet enters is heated and prepare clean air, using the thermal source as sintering oven 2.Sintering oven 2 tail gas enters ammonia absorption system 12 after preheater 1 is lowered the temperature after rotary kiln dust collecting system is gathered dust.
Claims (7)
1. a flyash clinkersintering device, it is characterized in that, this device is provided with preheater, sintering oven, cooler, air heat exchanger, hotblast stove, dust collecting system, preheater is connected with sintering oven kiln tail, cooler and hotblast stove are connected with sintering oven kiln hood respectively, air heat exchanger is connected with cooler, hotblast stove and cooler dust collecting system respectively, and preheater is connected with rotary kiln dust collecting system;
Dust collecting system is divided into two portions, is respectively rotary kiln dust collecting system and cooler dust collecting system:
Rotary kiln dust collecting system is provided with cyclone, bagroom II, blower fan II, gather dust warehouse, the inlet mouth of cyclone is connected with the exhaust outlet of preheater, the air outlet of cyclone is connected with the import of bagroom II, the outlet of bagroom II is connected with blower fan II, the outlet of blower fan II is connected with ammonia absorption system, and cyclone is all connected with the warehouse that gathers dust with the dust-exhausting port of bagroom II;
Cooler dust collecting system is provided with bagroom I, blower fan I and chimney, and bagroom I import is connected with air heat exchanger, and the outlet of bagroom I is connected with the blast inlet of blower fan I, and the exhaust outlet of blower fan I is connected with chimney;
During the work of flyash clinkersintering device, flyash raw material enter after preheater with the heat exchange of sintering oven tail gas, the raw material after preheating sinter grog in sintering oven; Grog after sintering enters cooler and is sent into grog leaching workshop by after air cooling by transfer roller, after the hot blast that cooler exhaust outlet is discharged enters air heat exchanger cooling, outer row after cooler dust collecting system is gathered dust, enter hotblast stove after the air that air heat exchanger fresh inlet enters is heated and prepare clean air, using the thermal source as sintering oven; Sintering oven tail gas enters ammonia absorption system after preheater cooling after rotary kiln dust collecting system is gathered dust;
Preheater, sintering oven, cooler, air heat exchanger, hotblast stove, dust collecting system are in a workshop;
Raw material are placed in preheater, and preheater discharge port is connected with the kiln tail feed end of sintering oven, and the exhaust outlet of preheater is connected with cyclone;
The kiln hood discharge end of sintering oven is connected with the import of cooler and the heating duct of hotblast stove, and cooler discharging is the grog sintered;
The gas approach of air heat exchanger is connected with cooler exhaust outlet, and the exhanst gas outlet of air heat exchanger is connected with bagroom I;
The fresh inlet of air heat exchanger directly connects air, and the new wind outlet of air heat exchanger is connected with the blast inlet of hotblast stove;
The exhanst gas outlet of hotblast stove has two branch roads, and a branch road is connected with hotblast stove, for hotblast stove provides readjustment wind, and another discharged gas fume;
The fresh inlet of hotblast stove exports with the new wind of air heat exchanger and is connected, and the hot-blast outlet of hotblast stove is connected with sintering oven;
Preheater is connected with sintering oven by tremie pipe, and the raw material after the tail gas of sintering oven and preheating all flow through tremie pipe;
Be provided with water spray system outside cooler simultaneously, by the mode at cooler outer wall spray water, in conjunction with the mode of cold front heavy rain, be embodied as grog cooling in cooling cylinder;
Airlock is provided with between cooler and sintering oven.
2. according to flyash clinkersintering device according to claim 1, it is characterized in that, preheater is adverse current direct heat-exchanging type preheater.
3. according to flyash clinkersintering device according to claim 1, it is characterized in that, sintering oven is internal heat type rotary kiln.
4. according to flyash clinkersintering device according to claim 1, it is characterized in that, cooler is air-cooled direct heat-exchanging type cooler.
5. according to flyash clinkersintering device according to claim 1, it is characterized in that, air heat exchanger is indirect heat exchange type interchanger.
6. according to flyash clinkersintering device according to claim 1, it is characterized in that, air heat exchanger is tubular air preheater or rotary regenerative air preheater.
7. according to flyash clinkersintering device according to claim 1, it is characterized in that, hotblast stove is indirect heat exchange type hotblast stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210397288.1A CN103771464B (en) | 2012-10-18 | 2012-10-18 | A kind of flyash clinkersintering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210397288.1A CN103771464B (en) | 2012-10-18 | 2012-10-18 | A kind of flyash clinkersintering device |
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| CN103771464A CN103771464A (en) | 2014-05-07 |
| CN103771464B true CN103771464B (en) | 2016-02-10 |
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| CN201210397288.1A Active CN103771464B (en) | 2012-10-18 | 2012-10-18 | A kind of flyash clinkersintering device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106222427A (en) * | 2016-08-31 | 2016-12-14 | 中国华能集团清洁能源技术研究院有限公司 | A kind of aluminum-extracted pulverized fuel ash device |
| CN110220386A (en) * | 2019-06-04 | 2019-09-10 | 苏州中材非金属矿工业设计研究院有限公司 | A kind of kaolin powder pre-heating system and kaolin powder calcination system and method for calcinating comprising it |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105830A (en) * | 1986-07-18 | 1987-03-25 | 汤从心 | Coal ash produces alumina, cement burning novel process |
| CN202156936U (en) * | 2011-07-25 | 2012-03-07 | 北京世纪地和科技有限公司 | Sintering rotary kiln device using coal ash to produce alumina in low temperature-ammonia method |
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2012
- 2012-10-18 CN CN201210397288.1A patent/CN103771464B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105830A (en) * | 1986-07-18 | 1987-03-25 | 汤从心 | Coal ash produces alumina, cement burning novel process |
| CN202156936U (en) * | 2011-07-25 | 2012-03-07 | 北京世纪地和科技有限公司 | Sintering rotary kiln device using coal ash to produce alumina in low temperature-ammonia method |
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| CN103771464A (en) | 2014-05-07 |
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