CN110065962A - A kind of energy-efficient oxidative system of the useless ash of desulfurization and method - Google Patents
A kind of energy-efficient oxidative system of the useless ash of desulfurization and method Download PDFInfo
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- CN110065962A CN110065962A CN201910305514.0A CN201910305514A CN110065962A CN 110065962 A CN110065962 A CN 110065962A CN 201910305514 A CN201910305514 A CN 201910305514A CN 110065962 A CN110065962 A CN 110065962A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
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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
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Abstract
The present invention provides a kind of energy-efficient oxidative system of the useless ash of desulfurization and method, belongs to field of environment engineering technology.The system includes deduster, preheating kiln, oxidation kiln, externally heated oven and cooling kiln, and deduster setting is in preheating kiln front end, and preheating kiln rear portion setting oxidation kiln, externally heated oven is oxidation kiln heat supply, and cooling kiln is arranged in oxidation kiln rear portion.Deduster includes gas inlet, exhanst gas outlet and ash discharging hole；Preheating kiln includes feed inlet, exhaust outlet, discharge gate and air inlet；Aoxidizing kiln includes feed inlet, exhaust outlet, air inlet and discharge gate；Externally heated oven includes fuel feed inlet, combustion-supporting wind inlet and hot fume outlet；Cooling kiln includes feed inlet, exhaust outlet, air inlet and discharge gate.The system has many advantages, such as that low energy consumption, oxidation efficiency is high, processing capacity is big, is suitble to industrialized production and application.
Description
Technical field
The present invention relates to field of environment engineering technology, a kind of energy-efficient oxidative system of the useless ash of desulfurization and side are particularly related to
Method.
Background technique
Domestic and international application is broadly divided into wet desulphurization, semi-dry desulphurization and dry desulfurization in the technology of flue gas desulfurization.Due to
The advantages that desulfuration efficiency of wet desulphurization is high, desulfurizing byproduct utilizes technology maturation, application percentage is up to 85% or more, but the skill
Art the problems such as there are gypsum rains, coloured plume itself, as national requirements for environmental protection is continuously improved, major industrial enterprise is gradually inclined to
In using Summary of Semi-dry Flue Gas Desulfurization, the technological investment and operating cost are lower than wet desulphurization, and coloured misty rain is not present,
Promote its application percentage constantly.
As semi-dry desulphurization technology is widely applied, especially in steel, power industry, production process, all produce every year
The raw useless ash of a large amount of desulfurization, due to containing a large amount of calcium sulfite (CaSO in the useless ash of desulfurization3), the material stability is poor, hydration reaction
Slowly, it is not directly applicable cement building material industry, it is difficult to be carried out comprehensive utilization of resources.Caused by current each large enterprises
The useless ash of desulfurization all in stockpiling state, occupies a large amount of soils greatly, and the useless grey granularity of desulfurization is thinner, belongs to alkaline matter, easily
Pollute surrounding enviroment.Therefore, solve desulfurization give up ash comprehensive utilization of resources key be grey sulfite calcium how efficiently,
Low consumption is converted into calcium sulfate (CaSO4).
Patent CN201410380659 .4 discloses a kind of dry method, two sections of the semi-dry desulphurization ash oxygen-enriched external heat oxygen of revolution
Chemical industry skill and device, the atmospheric heat which leads in kiln exchange heat from heating furnace hot fume, and heat exchange efficiency is low, material preheating
Effect is poor, and energy consumption is higher；Using kiln hood into air, with preheated section of raw material cocurrent, oxidation panel, preheating material effect is poor, air-flow
Portable non-oxidation particle mixes with finished product to kiln tail, causes finished product calcium sulfite content high, be unfavorable for subsequent building materials application；
Technology finished product heat exchange uses heat pipe indirect heat exchange, and heat exchange efficiency is low, and product temperature, subsequent transportation, storage cannot be effectively reduced
There are larger problems.For the device because being influenced by the revolving cylinder strength of materials, processing material ability is limited, and annual production capacity highest is only
There are 40,000 tons.
ZL201710150077.0 " sintering desulfuration ash treatment system and method ", is directly added slag for Desulphurization for Desulphurization
Ditch, produces slag, and grey sulfite calcium can decomposite SO at high temperature2, pollute atmospheric environment.
The ZL201710123582.6 device and oxidation modifying method of semi-dry desulphurization ash oxidation modification " a kind of be sintered " and
ZL201710123453.7 " a kind of method of sintering flue gas semi-dry desulphurization ash acid oxidation modification ", though above two method is former
It is feasible in reason, but industrialization large-scale production is not suitable for from technology and equipment.
Summary of the invention
The useless grey oxidation processes of prior art desulfurization are at high cost, generate secondary pollution, oxidation efficiency is low in order to solve by the present invention
The problems such as, a kind of energy-efficient oxidative system of the useless ash of desulfurization and method are provided, the ash that gives up of the desulfurization after oxidation processes is answered
For cement, building materials of gypsum industry, recycling, high value added utilization are realized.
The system includes that deduster, preheating kiln, oxidation kiln, externally heated oven and cooling kiln, deduster are arranged before preheating kiln
End, preheating kiln rear portion setting oxidation kiln, externally heated oven is oxidation kiln heat supply, and cooling kiln is arranged in oxidation kiln rear portion；Wherein, deduster
Including gas inlet, exhanst gas outlet and ash discharging hole, preheating kiln includes preheating kiln exhaust outlet, preheating kiln feed inlet, preheating kiln air inlet
Mouth and preheating kiln discharge gate, oxidation kiln include oxidation kiln exhaust gas mouth, aoxidize kiln feed inlet, oxidation kiln air inlet and oxidation kiln discharge
Mouthful, externally heated oven includes burner, hot fume outlet, fuel feed inlet and combustion-supporting wind inlet, cooling kiln include cooling kiln exhaust gas mouth,
Cooling kiln feed inlet, cooling kiln air inlet and cooling kiln discharge gate.
Wherein, ash discharging hole connects preheating kiln feed inlet, and preheating kiln exhaust outlet connects gas inlet, the connection of preheating kiln discharge gate
Kiln feed inlet is aoxidized, kiln exhaust gas mouth and hot fume outlet connection preheating kiln air inlet are aoxidized, oxidation kiln discharge gate connects cooling kiln
Feed inlet, cooling kiln exhaust gas mouth connection oxidation kiln air inlet and combustion-supporting wind inlet.
Preheating kiln and cooling kiln outer layer are steel roller, and internal building heat insulation material, oxidation kiln is external heating rotary kiln, oxidation
The roller of kiln is made of 310s stainless steel material.
It is respectively provided with special construction lifting blade in the roller of preheating kiln, oxidation kiln and cooling kiln, lifting blade is radially equal along roller
Cloth 12 are one group, and axial every 20cm one group of lifting blade of arrangement along roller, the rotation angle of lifting blade is according to one group of cloth thereon
Situation is set, successively rotates 10 ° in the same direction.
Wherein, lifting blade is that 310s stainless steel materials are welded in 90 ° by two stock materials, with preheating kiln, oxidation kiln and
The fixed plate of the kiln body of cooling kiln is rectangle, and rectangle width is 10 ~ 20cm, and rectangle length is 20 ~ 40cm, another piece
Plate is right angled triangle, right angled triangle 5 ~ 10cm of short side, and right angled triangle long side is identical as material of rectangular channel length.
The burner of externally heated oven is arranged in below oxidation kiln roller, and oxidation kiln roller is located at externally heated oven center.
Using the method for the system, comprise the following steps that
S1: material preheating: material is sent into preheating kiln after the useless ash of desulfurization is mixed with the dedusting ash of deduster, aoxidizes hot fume in kiln
It is sent into externally heated oven hot fume by preheating kiln kiln tail, flue gas and material counterflow heat exchange, flue gas enters deduster in kiln after heat exchange,
Flue gas outlet after dedusting；
S2: material oxidation: the material after preheating in S1 is sent into oxidation kiln, is reacted with the high temperature air in oxidation kiln, complete
At oxidation process, the high temperature air aoxidized in kiln is sent into from oxidation kiln kiln tail, and material aoxidizes heat source and derives from externally heated oven, fuel
With high temperature combustion supporting air combustion heat release, heat supply is aoxidized for material, the hot fume generated after burning is sent into preheating kiln；
S3: material is cooling: the material after aoxidizing in S2 is sent into cooling kiln, and the cold air being sent into cooling kiln kiln tail carries out adverse current and changes
Heat, from cooling kiln blade trailing cooling kiln discharge gate discharge, cold air is heated to be high temperature air by material, the cooling from cooling kiln front
The discharge of kiln exhaust gas mouth is respectively fed to inside externally heated oven and oxidation kiln.
Wherein, material is preheating kiln residence time as 60 ~ 90min in S1, and aoxidizing hot fume temperature in kiln is 500 ~ 550
DEG C, externally heated oven flue-gas temperature is 650 ~ 700 DEG C.
The control of kiln interior reaction temperature is aoxidized in S2 at 600 ~ 650 DEG C, material oxidation kiln kiln residence time be 15 ~
20min。
Material after aoxidizing in S3 is 60 ~ 90min in cooling kiln residence time, temperature be reduced to 200 DEG C hereinafter, cooling
High temperature air temperature in kiln after heat exchange is 400 ~ 450 DEG C.
The advantageous effects of the above technical solutions of the present invention are as follows:
In above scheme, it is respectively completed preheating, oxidation, refrigerating function using preheating kiln, oxidation kiln, cooling three kilns of kiln,
According to material in each kiln technological parameter, the parameters such as different kiln sizes, revolving speed can be designed, can effectively improve external heat
The working efficiency of kiln is aoxidized, single devices annual amount for the treatment of can be improved to 7 ~ 80,000 tons.
The present invention makes full use of oxidation kiln hot waste gas and externally heated oven hot fume high temperature heat, carries out in preheating kiln and material
Direct counterflow heat exchange, heat exchange efficiency are up to 70%, reduce system energy consumption.Preheating kiln roller is inside holding, and equipment can be according to object
Expect preheating requirement, diameter of cylinder and length are expanded, to guarantee sufficient heat-exchange time and treating capacity, improves material preheating temperature
Degree.Further, material heating-up time in oxidation kiln can be reduced, improves oxidation kiln revolving speed, and then improve yield.
The present invention, which aoxidizes kiln, can reduce kiln tail object with material countercurrent movement using kiln tail 400 ~ 450 DEG C of high temperature airs of feeding
Material temperature degree is avoided because of exothermic heat of reaction, and kiln tail temperature of charge is more than 670 DEG C and causes CaSO3Decompose SO2Again problem is discharged.Using outer
Heat form prevents CaSO3It is directly contacted with thermal-flame and decomposes generation.
Material of the present invention is cooling to use the direct heat exchange mode of gas-solid, and heat exchange efficiency is high, can recycle product waste heat, reduces system
20% or more energy consumption of system.Discharge of materials temperature is low simultaneously, is conducive to subsequent transportation, storage.
Detailed description of the invention
Fig. 1 is the useless energy-efficient oxidative system structural schematic diagram of ash of desulfurization of the invention；
Fig. 2 is the lifting blade of the invention distribution schematic diagram in kiln；
Fig. 3 is lifting blade structural schematic diagram of the invention, wherein (a) is lifting blade main view, (b) is lifting blade right view.
Wherein: 1- deduster；2- preheating kiln；3- aoxidizes kiln；4- externally heated oven；5- cools down kiln；101- gas inlet；102-
Exhanst gas outlet；103- ash discharging hole；201- preheating kiln exhaust outlet；202- preheating kiln feed inlet；203- preheating kiln air inlet；204- is pre-
Heating kiln discharge gate；301- aoxidizes kiln exhaust gas mouth；302- aoxidizes kiln feed inlet；303- aoxidizes kiln air inlet；304- aoxidizes kiln discharge
Mouthful；The outlet of 401- hot fume；402- fuel feed inlet；The combustion-supporting wind inlet of 403-；501- cools down kiln exhaust gas mouth；The cooling kiln of 502- into
Material mouth；503- cools down kiln air inlet；504- cools down kiln discharge gate.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of energy-efficient oxidative system of the useless ash of desulfurization and method.
As shown in Figure 1, the system includes deduster 1, preheating kiln 2, oxidation kiln 3, externally heated oven 4 and cooling kiln 5, deduster
1 setting is in 2 front end of preheating kiln, and 2 rear portion of preheating kiln setting oxidation kiln 3, externally heated oven 4 is oxidation 3 heat supply of kiln, aoxidizes 3 rear portion of kiln
Cooling kiln 5 is set；
Wherein, deduster 1 includes gas inlet 101, exhanst gas outlet 102 and ash discharging hole 103, for kiln will be discharged in preheating kiln 2
Dust in interior flue gas is removed, and the dedusting ash of generation is mixed with the useless ash of desulfurization is again introduced into preheating kiln 2.
Preheating kiln 2 includes preheating kiln exhaust outlet 201, preheating kiln feed inlet 202, preheating kiln air inlet 203 and preheating kiln row
Material mouth 204, the mixed flue gas that material and kiln tail are sent into preheating kiln 2 carry out gas-solid counterflow heat exchange, for the heat exchange effect for increasing material
Rate, the lifting blade that the present invention is arranged in kiln can make material form uniform and stable material curtain in kiln, promote dry materials preheating,
Temperature of charge rises to 350 ~ 400 DEG C, and the residence time is 60 ~ 90min in preheating kiln 2.Flue gas enters deduster in kiln after heat exchange
1, the flue gas outlet after dedusting.Aoxidize kiln 3 in hot fume temperature be 500 ~ 550 DEG C, 4 hot fume temperature of externally heated oven be 650 ~
700℃。
Aoxidizing kiln 3 includes oxidation kiln exhaust gas mouth 301, oxidation kiln feed inlet 302, oxidation kiln air inlet 303 and oxidation kiln row
Material mouth 304, the useless ash of desulfurization after preheating are sent into oxidation kiln 3, are reacted with high temperature air, complete oxidation process.Aoxidize kiln 3
At 600 ~ 650 DEG C, material is 15 ~ 20min in kiln residence time for interior reaction temperature control.
Externally heated oven 4 includes burner, hot fume outlet 401, fuel feed inlet 402 and combustion-supporting wind inlet 403, externally heated oven
The hot fume that fuel combustion generates enters preheating kiln 2, preheats to material.Burner is arranged in below oxidation kiln roller, oxidation
Kiln roller is located at externally heated oven center.
Cooling kiln 5 includes cooling kiln exhaust gas mouth 501, cooling kiln feed inlet 502, cooling kiln air inlet 503 and cooling kiln row
Material mouth 504, the finished product ash that temperature is 500 ~ 550 DEG C after oxidation are sent into cooling kiln, carry out adverse current with the cold air that kiln tail is sent into and change
Heat, product ash in 60 ~ 90min of kiln residence time, temperature be reduced to 200 DEG C hereinafter, from cooling kiln tail portion discharging end shield discharge.
Wherein 400 ~ 450 DEG C of high temperature air temperature.
As shown in Figure 1, ash discharging hole 103 connects preheating kiln feed inlet 202, preheating kiln exhaust outlet 201 connects gas inlet
101, the connection oxidation kiln feed inlet 302 of preheating kiln discharge gate 204 aoxidizes the 401 connection preheating of kiln exhaust gas mouth 301 and hot fume outlet
Kiln air inlet 203, oxidation kiln discharge gate 304 connect cooling kiln feed inlet 502, the cooling connection of kiln exhaust gas mouth 501 oxidation kiln air inlet
Mouth 303 and combustion-supporting wind inlet 403.
Fig. 2 is the lifting blade setting structure schematic diagram in preheating kiln 2, oxidation kiln 3 and cooling kiln 5 that the present invention uses.It raises
Flitch is one group along roller radial equipartition 12, axial every 20cm one group of lifting blade of arrangement along roller, rotates angle according to it
Upper one group of deployment scenarios successively rotate 10 ° in the same direction.As shown in figure 3, lifting blade is 310s stainless steel plate by two stock materials
Material is welded in 90 °, is 10 ~ 20cm with kiln body fixed plate height, and length is 20 ~ 40cm.Another side plate is right angle trigonometry
Shape, 5 ~ 10cm of short side, long side are consistent with above-mentioned material of rectangular channel length.
It is explained combined with specific embodiments below.
Embodiment 1
The present embodiment uses system shown in FIG. 1, carries out oxidation processes to the useless ash of desulfurization.The useless ash of desulfurization is handled in the present embodiment,
CaSO3Content is 39%, CaSO4Content is 15%, remaining ingredient is CaCO3、Ca(OH)2。
Detailed process is as follows for processing:
Preheating: the useless ash of desulfurization enters in preheating kiln, and the mixed flue gas that kiln tail is passed through 550 DEG C heats material, moves to kiln
When tail, 350 DEG C can be heated to, kiln residence time 60min.
Oxidation: being warming up to the useless ash of 350 DEG C of desulfurization and enter oxidation kiln, and kiln interior reaction temperature is 650 DEG C, is moved through to kiln tail
Oxidation process, kiln residence time 15min are completed in journey.
Cooling: the finished product ash that temperature is 550 DEG C after oxidation is sent into the cooling kiln, carries out with the cold air that kiln tail is sent into inverse
Stream heat exchange, for product ash in kiln residence time 60min, temperature is reduced to 200 DEG C, from cooling kiln tail portion discharging end shield discharge.Through
400 DEG C of high temperature air temperature are crossed after exchanging heat.
Product ash detects CaSO by GB/T 5484-2012 chemical analysis of gypsum method after oxidation3Content is 1.8%,
CaSO4Content is 55.3%.
Embodiment 2
The present embodiment uses system shown in FIG. 1, carries out oxidation processes to the useless ash of desulfurization.The useless ash of desulfurization is handled in the present embodiment,
CaSO3Content is 39%, CaSO4Content is 15%, remaining ingredient is CaCO3、Ca(OH)2。
Concrete processing procedure is as follows:
Preheating: the useless ash of desulfurization enters in preheating kiln, and the mixed flue gas that kiln tail is passed through 650 DEG C heats material, moves to kiln
When tail, 400 DEG C can be heated to, kiln residence time 90min.
Oxidation: being warming up to the useless ash of 400 DEG C of desulfurization and enter oxidation kiln, and kiln interior reaction temperature is 610 DEG C, is moved through to kiln tail
Oxidation process, kiln residence time 20min are completed in journey.
Cooling: the finished product ash that temperature is 520 DEG C after oxidation is sent into the cooling kiln, carries out with the cold air that kiln tail is sent into inverse
Stream heat exchange, for product ash in kiln residence time 90min, temperature is reduced to 150 DEG C, from cooling kiln tail portion discharging end shield discharge.Through
410 DEG C of high temperature air temperature are crossed after exchanging heat.
Product ash detects CaSO by GB/T 5484-2012 chemical analysis of gypsum method after oxidation3Content is 1.7%,
CaSO4Content is 55.6%.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of useless energy-efficient oxidative system of ash of desulfurization, it is characterised in that: including deduster (1), preheating kiln (2), oxidation kiln
(3), externally heated oven (4) and cooling kiln (5), deduster (1) setting is in preheating kiln (2) front end, the setting oxidation of preheating kiln (2) rear portion
Kiln (3), externally heated oven (4) are oxidation kiln (3) heat supply, and cooling kiln (5) are arranged in oxidation kiln (3) rear portion；Wherein, deduster (1) wraps
Include gas inlet (101), exhanst gas outlet (102) and ash discharging hole (103), preheating kiln (2) includes preheating kiln exhaust outlet (201), pre-
Heating kiln feed inlet (202), preheating kiln air inlet (203) and preheating kiln discharge gate (204), oxidation kiln (3) include oxidation kiln exhaust gas
Mouth (301), oxidation kiln feed inlet (302), oxidation kiln air inlet (303) and oxidation kiln discharge gate (304), externally heated oven (4) packet
Burner, hot fume outlet (401), fuel feed inlet (402) and combustion-supporting wind inlet (403) are included, cooling kiln (5) include cooling kiln row
Port (501), cooling kiln feed inlet (502), cooling kiln air inlet (503) and cooling kiln discharge gate (504).
2. the useless energy-efficient oxidative system of ash of desulfurization according to claim 1, it is characterised in that: the ash discharging hole (103)
It connects preheating kiln feed inlet (202), preheating kiln exhaust outlet (201) connects gas inlet (101), and preheating kiln discharge gate (204) is even
Oxidation kiln feed inlet (302) is connect, kiln exhaust gas mouth (301) and hot fume outlet (401) connection preheating kiln air inlet (203) are aoxidized,
It aoxidizes kiln discharge gate (304) to connect cooling kiln feed inlet (502), cooling kiln exhaust gas mouth (501) connection oxidation kiln air inlet (303)
With combustion-supporting wind inlet (403).
3. the useless energy-efficient oxidative system of ash of desulfurization according to claim 1, it is characterised in that: the preheating kiln (2) and
Cooling kiln (5) outer layer is steel roller, and internal building heat insulation material, oxidation kiln (3) is external heating rotary kiln, aoxidizes the rolling of kiln (3)
Cylinder is made of 310s stainless steel material.
4. the useless energy-efficient oxidative system of ash of desulfurization according to claim 1, it is characterised in that: the preheating kiln (2), oxygen
Change and be respectively provided with special construction lifting blade in the roller of kiln (3) and cooling kiln (5), lifting blade is one along roller radial equipartition 12
Group, axial every 20cm one group of lifting blade of arrangement along roller, the rotation angle of lifting blade is according to one group of deployment scenarios thereon, along same
One direction successively rotates 10 °.
5. the useless energy-efficient oxidative system of ash of desulfurization according to claim 4, it is characterised in that: the lifting blade is by two pieces
Material is that 310s stainless steel materials are welded in 90 °, is fixed with the kiln body of preheating kiln (2), oxidation kiln (3) and cooling kiln (5)
Plate be rectangle, rectangle width is 10~20cm, and rectangle length is 20~40cm, and another block of plate is right angle trigonometry
Shape, right angled triangle 5~10cm of short side, right angled triangle long side are identical as material of rectangular channel length.
6. the useless energy-efficient oxidative system of ash of desulfurization according to claim 1, it is characterised in that: the externally heated oven (4)
Burner be arranged in oxidation kiln (3) roller below, oxidation kiln (3) roller be located at externally heated oven (4) center.
7. using the method for the useless energy-efficient oxidative system of ash of desulfurization described in claim 1, it is characterised in that: such as including step
Under:
S1: material preheating: material is sent into preheating kiln after the useless ash of desulfurization is mixed with the dedusting ash of deduster, aoxidizes hot fume in kiln
It is sent into externally heated oven hot fume by preheating kiln kiln tail, flue gas and material counterflow heat exchange, flue gas enters deduster in kiln after heat exchange,
Flue gas outlet after dedusting；
S2: material oxidation: the material after preheating in S1 is sent into oxidation kiln, is reacted with the high temperature air in oxidation kiln, complete
At oxidation process, the high temperature air aoxidized in kiln is sent into from oxidation kiln kiln tail, and material aoxidizes heat source and derives from externally heated oven, fuel
With high temperature combustion supporting air combustion heat release, heat supply is aoxidized for material, the hot fume generated after burning is sent into preheating kiln；
S3: material is cooling: the material after aoxidizing in S2 is sent into cooling kiln, and the cold air being sent into cooling kiln kiln tail carries out adverse current and changes
Heat, from cooling kiln blade trailing cooling kiln discharge gate discharge, cold air is heated to be high temperature air by material, the cooling from cooling kiln front
The discharge of kiln exhaust gas mouth is respectively fed to inside externally heated oven and oxidation kiln.
8. the application method of the useless energy-efficient oxidative system of ash of desulfurization according to claim 7, it is characterised in that: the S1
Middle material is 60~90min in preheating kiln residence time, and aoxidizing hot fume temperature in kiln is 500~550 DEG C, externally heated oven cigarette
Temperature degree is 650~700 DEG C.
9. the application method of the useless energy-efficient oxidative system of ash of desulfurization according to claim 7, it is characterised in that: the S2
At 600~650 DEG C, material is 15~20min in oxidation kiln kiln residence time for middle oxidation kiln interior reaction temperature control.
10. the method for the useless energy-efficient oxidative system of ash of desulfurization according to claim 7, it is characterised in that: in the S3
Material after oxidation is 60~90min in cooling kiln residence time, temperature be reduced to 200 DEG C hereinafter, in cooling kiln after heat exchange
High temperature air temperature be 400~450 DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110514021A (en) * | 2019-09-04 | 2019-11-29 | 营口仁和昌顺耐火材料有限公司 | A kind of rotation dynamic sinter system |
| CN110833813A (en) * | 2019-12-02 | 2020-02-25 | 北京北科环境工程有限公司 | Desulfurization ash oxidation device |
| CN110849169A (en) * | 2019-12-02 | 2020-02-28 | 北京北科环境工程有限公司 | Desulfurized fly ash preheating device |
| CN110864555A (en) * | 2019-12-02 | 2020-03-06 | 北京北科环境工程有限公司 | Hot flue gas circulation-based desulfurization ash indirect heating oxidation modification system and method |
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