CN109704292A - It is a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater - Google Patents
It is a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater Download PDFInfo
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- CN109704292A CN109704292A CN201910117113.2A CN201910117113A CN109704292A CN 109704292 A CN109704292 A CN 109704292A CN 201910117113 A CN201910117113 A CN 201910117113A CN 109704292 A CN109704292 A CN 109704292A
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- gas
- calcium sulfate
- fluidized bed
- temperature flue
- heating furnace
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- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 title claims abstract description 80
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 80
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 54
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000003546 flue gas Substances 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 239000012530 fluid Substances 0.000 claims abstract description 28
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 26
- 230000000694 effects Effects 0.000 claims abstract description 23
- 238000005243 fluidization Methods 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 45
- 239000011593 sulfur Substances 0.000 claims description 33
- 229910052717 sulfur Inorganic materials 0.000 claims description 33
- 239000003575 carbonaceous material Substances 0.000 claims description 31
- 238000001354 calcination Methods 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000005864 Sulphur Substances 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 239000000571 coke Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000005539 carbonized material Substances 0.000 claims description 4
- 239000002817 coal dust Substances 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- 229910052602 gypsum Inorganic materials 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 239000010440 gypsum Substances 0.000 description 7
- 238000012546 transfer Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
Present disclose provides a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, including heating furnace body, burner and heat exchanger, calcium sulfate/calcium nitrate is added at the top of furnace body, under the action of bottom fluidization gas, the Micro Fluid state of fluid is appeared similar in fluidized bed, then under the heat effect of other side high-temperature flue gas, it is heated to decomposition temperature.The disclosure can realize efficiently separating for high-temperature flue gas and gas decomposition product, greatly improve the purity of gas decomposition product, and disclosure high temperature flue gas and material integrally show inverse formula and exchange heat, and fluidizer is additionally arranged at the bottom of in furnace makes material show Micro Fluid state, disturbance in bed can be enhanced, increase furnace tube internal heat exchange coefficient.
Description
Technical field
This disclosure relates to industrial solid castoff resource utilization field, more particularly to it is a kind of for calcined calcium sulfate hemihydrate/nitre
The fluidized bed indirect heater of sour calcium.
Background technique
With the fast development of China's high concentration phosphate fertilizer and phosphoric acid industry, the yield of by-product ardealite is sharply increased, phosphorus
The main component of gypsum is CaSO4·2H2O, while also containing other a small amount of metal ion sulfate.China's ardealite at present
Nearly hundred million tons of annual emissions, accumulate nearly 500,000,000 tons of accumulating amount.At present although country's ardealite has certain utilization ways, but all exists
Certain problem, and treating capacity is smaller, can not alleviate the pollution situation of China's ardealite.Ardealite contains acid and nuisance
Matter, it is necessary to it is special to stack, not only took up an area waste of resource again, and ardealite is stacked understand polluted underground water for a long time.
Sulfur dioxide has caused serious environmental problem as one of major pollutants, causes the strong pass of government
Note；State Council in 2014 sends the documents for the first time requires newly-built coal unit pollutant emission level to reach gas turbine unit, for two
The emission level of sulfur oxide requires to reach 35mg/m3.The generating set in China current 95% uses Limestone-gypsum Wet Flue Gas Desulfurization Process
Technology, the technology have many advantages, such as that system is simple, desulfuration efficiency is high and stable, but need a large amount of exploitation lime stones, make
Destroy and threaten ecological environment at massif, this method is the process of a solid sulphur row carbon, annual 2.15 hundred million tons of by-product poor quality gypsum.
Gypsum property inferior is poor, and containing compared with harmful substances such as multi-metals, therefore, it is difficult to utilize, a large amount of desulfurized gypsum is accumulated
Seriously destroy ecological environment.
Desulfurizing agent (calcium oxide) is regenerated using low-grade gypsum resource to be recycled, and can produce high concentration
SO2Gas can be used as the unstripped gas of production sulfuric acid and sulphur.China is sulphur resource default country, annual sulphur import and
Consumption position is at the forefront in the world, and external dependence degree is high, and sulphur is as important one of industrial chemicals, market value and using valence
Value is all larger than sulfuric acid.
Therefore the regeneration of now widely used fume desulfurizing agent calcium oxide and the resource utilization of sulfur dioxide are realized
It is the effective measures for solving environmental protection problem and reducing external dependence degree.But with regard to known to inventor, in existing calcining furnace
And chain grate furnace and rotary kiln converter are widely used that in incinerator, mainly added by burning coal and natural gas
Thermal material reaches calcining and decomposition temperature completes reaction.But the SO of the burning high-temperature flue gas generated and calcium sulfate generation2Mixing
Together, SO is reduced2Purity, therefore traditional calcining furnace be unfavorable for recycle calcined calcium sulfate hemihydrate gaseous products SO2。
Summary of the invention
In order to solve the deficiencies in the prior art, present disclose provides a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed
Indirect heater,
To achieve the goals above, the technical solution of the disclosure is as follows:
It is a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, including heating furnace body, the heating furnace
Upper of furnace body is equipped with heating furnace top headroom, and heating furnace top headroom is equipped with material inlet and decomposed gas outlet,
Slot type heat exchanger is equipped with inside the heating furnace body, material aisle and high-temperature flue gas aisle are longitudinally handed in the slot type heat exchanger
Mistake arrangement, material aisle bottom are connected with Micro Fluid bed heating furnace bellows, and the Micro Fluid bed heating furnace bellows are used for
The fluidized gas for making goods fluid is provided；
Calcium sulfate/the calcium nitrate enters in heat exchanger behind material aisle from material inlet, in the effect of bottom fluidization gas
Under show Micro Fluid state, then high-temperature flue gas effect under carry out pyrolytic.
Further, the connectivity part of the Micro Fluid bed heating furnace bellows and material aisle bottom is equipped with fluidization hood, institute
Fluidization hood is stated for stabilization fluid gas.
Further, when carrying out calcium sulfate calcining, the fluidized gas is sulfur-bearing lack of gas, is added in the material aisle
Carbon material, the calcium sulfate carry out high under high-temperature flue gas effect after mixing according to set proportion with carbon material and sulfur-bearing lack of gas
Temperature is decomposed, the carbon material and sulfur-bearing lack of gas for reducing calcium sulfate decomposition temperature；When carrying out calcium nitrate calcining, the stream
Changing gas is air or nitrogen.
Further, high-temperature flue gas aisle one end is connected with combustor exit, one end and is set to heating-furnace
The high-temperature flue gas outlet in side portion is connected, and the high-temperature flue-gas is 1100 DEG C -1300 DEG C.
It is a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, including heating furnace body, the heating furnace
Tube bundle heat exchanger is equipped in furnace body, it is high temperature cigarette in the heat exchange tube that the tube bundle heat exchanger, which includes several heat exchanger tubes,
Flow channel, outer pipe is material flow path, and the material flow path bottom end is equipped with the spouted pipe of fluidized bed, and the spouted pipe is for spraying into fluidisation
Gas；
After the calcium sulfate/calcium nitrate enters material flow path, Micro Fluid state is showed under the action of bottom fluidization gas,
Then pyrolytic is carried out under high-temperature flue gas effect.
Further, when carrying out calcium sulfate calcining, the fluidized gas is sulfur-bearing lack of gas, is added in the material flow path
Carbon material, the calcium sulfate carry out high under high-temperature flue gas effect after mixing according to set proportion with carbon material and sulfur-bearing lack of gas
Temperature is decomposed, the carbon material and sulfur-bearing lack of gas for reducing calcium sulfate decomposition temperature；When carrying out calcium nitrate calcining, the stream
Changing gas is air or nitrogen.
Further, the heat exchanger tube top is connected with high-temperature flue gas outlet, bottom end and combustion chamber, the height
Warm flue-gas temperature is 1100 DEG C -1300 DEG C.
Further, the partial size of the carbon material is 60 μm of -3mm, and the carbon material includes but is not limited to coal dust, activity
Coke, active carbocoal, active carbon, carbonized material and graphite.
Further, the sulfur-bearing lack of gas come from carbon thermal reduction system tail part exhaust, and the sulfur-bearing exhausted temperature is 800
DEG C -1200 DEG C, ingredient includes N2, S steam, CO and CO2。
Further, the heating furnace body bottom is equipped with solid decomposition product exit.
Compared with prior art, the beneficial effect of the disclosure is:
The disclosure proposes a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, and proposes same
Two kinds of arrangements under effect, for chain grate furnace and rotary kiln converter high-temperature flue gas and material in current calcining heating furnace
The problem of decomposing the decomposition gas mixing generated, can realize high-temperature flue gas and calcium sulfate using the fluidized bed indirect heater of the disclosure
Decompose the high concentration SO generated2Decomposition gas separation, greatly improves SO2The purity of atmosphere, indirect raising prepare sulphur and sulfuric acid
Degree of purity；And disclosure high temperature flue gas and material integrally show inverse formula and exchange heat, and fluidizer is additionally arranged at the bottom of in furnace
So that material is showed Micro Fluid state, disturbance in bed can be enhanced, increase furnace tube internal heat exchange coefficient, have broad application prospects.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is that main view of the disclosure for a certain embodiment of calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater is shown
It is intended to；
Fig. 2 is that left view of the disclosure for a certain embodiment of calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater is shown
It is intended to；
Fig. 3 is that vertical view of the disclosure for a certain embodiment of calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater is shown
It is intended to；
Fig. 4 is that main view of the disclosure for another embodiment of calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater is shown
It is intended to；
Fig. 5 is that left view of the disclosure for another embodiment of calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater is shown
It is intended to；
Fig. 6 is that vertical view of the disclosure for another embodiment of calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater is shown
It is intended to；
In figure: 1, heating furnace body；2, heating furnace top headroom；3, Micro Fluid bed heating furnace bellows；4, combustion chamber；5,
Burner；6, high-temperature flue gas aisle；7, material aisle；8, fluidization hood；9, heat exchanger tube；10, spouted pipe；11, hot cigarette plenum chamber.
Specific embodiment
The disclosure is described further with specific embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In the disclosure, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ",
The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this public affairs
The relative for opening each component or component structure relationship and determination, not refers in particular to either component or element in the disclosure, cannot understand
For the limitation to the disclosure.
In the disclosure, term such as " affixed ", " connected ", " connection " be shall be understood in a broad sense, and indicate may be a fixed connection,
It is also possible to be integrally connected or is detachably connected；It can be directly connected, it can also be indirectly connected through an intermediary.For
The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the disclosure as the case may be,
It should not be understood as the limitation to the disclosure.
As one or more embodiments, as shown in Figure 1-3, between a kind of fluidized bed for calcined calcium sulfate hemihydrate/calcium nitrate
Heating furnace, including heating furnace body 1 are connect, 1 top of heating furnace body is equipped with heating furnace top headroom 2, the heating furnace
Top headroom 2 is equipped with material inlet and decomposed gas outlet, and slot type heat exchanger is equipped with inside the heating furnace body 1, described
Material aisle 7 and high-temperature flue gas aisle 6 are in longitudinally staggered disposition in slot type heat exchanger, 7 bottom of material aisle and Micro Fluid bed
Heating furnace bellows 3 are connected, and the Micro Fluid bed heating furnace bellows 3 are for providing the fluidized gas for making goods fluid；
Calcium sulfate/the calcium nitrate enters in heat exchanger behind material aisle 7 from material inlet, in the effect of bottom fluidization gas
Under show Micro Fluid state, high-temperature flue gas effect under carry out pyrolytic.
The Micro Fluid bed heating furnace bellows 3 and the connectivity part of 7 bottom of material aisle are equipped with fluidization hood 8, the fluidisation
Blast cap 8 is used for stabilization fluid gas.
In the present embodiment, when carrying out calcium sulfate calcining, the fluidized gas is sulfur-bearing lack of gas, is added in the material aisle 7
Added with carbon material, the calcium sulfate mixed according to set proportion with carbon material and sulfur-bearing lack of gas after high-temperature flue gas effect under into
Row pyrolytic, the carbon material and sulfur-bearing lack of gas for reducing calcium sulfate decomposition temperature；When carrying out calcium nitrate calcining, institute
Stating fluidized gas is air or nitrogen.
The obstructed sulfur-bearing lack of gas of calcium nitrate and Carbon Materials；The decomposition for being related to nitrate refers to the decomposition of pure salt, without it
His reactant, is equivalent to calcining furnace.
The carbon material is added directly into material position line in furnace hereinafter, realizing pipe laying charging by stove top feeder pipe, prevents
Only gas anti-channeling.
The outlet of described 6 one end of high-temperature flue gas aisle and combustion chamber 4 is connected, and one end and is set to heating furnace body side
High-temperature flue gas outlet is connected, and the high-temperature flue-gas is 1100 DEG C -1300 DEG C.
The combustion chamber 4 is disposed with burner 5.
The decomposition gas enters other systems by the decomposed gas outlet outlet of heating furnace top headroom 2 and is subject to benefit
With the natural subsidence of solid product powder may be implemented in heated furnace top headroom 2, reaches high concentration and decomposes gas purification
Purpose.
The material aisle 7 and the contact surface in longitudinally staggered disposition that can increase material and heat exchanger of high-temperature flue gas aisle 6
Product increases heat transfer effect.
The slot type heat exchanger material wants high temperature resistant and gaseous products to corrode, it is contemplated that 310s or ceramic material.
The partial size of the carbon material is 60 μm of -3mm, and the carbon material includes but is not limited to coal dust, activated coke, activity half
Coke, active carbon, carbonized material and graphite.
The sulfur-bearing lack of gas come from carbon thermal reduction system tail part exhaust, and the sulfur-bearing exhausted temperature is 800 DEG C -1200 DEG C,
Its ingredient includes N2, S steam, CO and CO2.The sulfur-bearing lack of gas generated in carbothermic reduction process are reducing agent participation as fluidized gas
Reaction, not only reduces reaction temperature, while increasing material in bed and disturbing, and the heat exchange for increasing material and high-temperature flue gas is imitated
Fruit improves the coefficient of heat transfer.
1 bottom of heating furnace body is equipped with solid decomposition product exit.
As one or more embodiments, as Figure 4-Figure 6, between a kind of fluidized bed for calcined calcium sulfate hemihydrate/calcium nitrate
Heating furnace, including heating furnace body 1 are connect, is equipped with tube bundle heat exchanger, the tube bundle heat exchanger packet in the heating furnace body 1
Several heat exchanger tubes 9 are included, it is high-temperature flue gas runner that the heat exchanger tube 9, which is managed interior, and outer pipe is material flow path, and the material flow path bottom end is set
There is the spouted pipe 10 of fluidized bed, the spouted pipe 10 is for spraying into fluidized gas；
After the calcium sulfate/calcium nitrate enters material flow path, Micro Fluid state is showed under the action of bottom fluidization gas,
Then pyrolytic is carried out under high-temperature flue gas effect.
In the present embodiment, when carrying out calcium sulfate calcining, the fluidized gas is sulfur-bearing lack of gas, addition in the material flow path
It is carried out under high-temperature flue gas effect after thering is carbon material, the calcium sulfate to mix according to set proportion with carbon material and sulfur-bearing lack of gas
Pyrolytic, the carbon material and sulfur-bearing lack of gas for reducing calcium sulfate decomposition temperature；It is described when carrying out calcium nitrate calcining
Fluidized gas is air or nitrogen.
The obstructed sulfur-bearing lack of gas of calcium nitrate and Carbon Materials；The decomposition for being related to nitrate refers to the decomposition of pure salt, without it
His reactant, is equivalent to calcining furnace.
The carbon material is added directly into material position line in furnace hereinafter, realizing pipe laying charging by stove top feeder pipe, prevents
Only gas anti-channeling.
The spouted pipe 10 can increase material in bed and disturb, and improve heat transfer effect.
9 top of heat exchanger tube is connected with high-temperature flue gas outlet, and bottom end is connected with combustion chamber 4, the high-temperature flue gas
Temperature is 1100 DEG C -1300 DEG C.
In the present embodiment, the high-temperature flue gas outlet is arranged on hot cigarette plenum chamber 11, and hot cigarette plenum chamber 11 is arranged in furnace
Above body, combustion chamber 4 is arranged in below furnace body, and burner 5 is arranged in combustion chamber 4.
The pipe heat exchanger material wants high temperature resistant and gaseous products to corrode, it is contemplated that 310s or ceramic material.
The partial size of the carbon material is 60 μm of -3mm, and the carbon material includes but is not limited to coal dust, activated coke, activity half
Coke, active carbon, carbonized material and graphite.
The sulfur-bearing lack of gas come from carbon thermal reduction system tail part exhaust, and the sulfur-bearing exhausted temperature is 800 DEG C -1200 DEG C,
Its ingredient includes N2, S steam, CO and CO2.The sulfur-bearing lack of gas generated in carbothermic reduction process are reducing agent participation as fluidized gas
Reaction, not only reduces reaction temperature, while increasing material in bed and disturbing, and the heat exchange for increasing material and high-temperature flue gas is imitated
Fruit improves the coefficient of heat transfer.
The heating furnace body bottom is equipped with solid decomposition product exit.
By taking calcium sulfate decomposes as an example, in above two fluidized bed indirect heater, adopted between calcium sulfate and high-temperature flue gas
With wall-type heat exchange mode, the SO parsed2Gas is not mixed with high-temperature flue gas, and SO can be improved2The purity of unstripped gas, indirectly
Improve the sulfuric acid of preparation and the degree of purity of sulphur.
In specific implementation, calcium sulfate is added at the top of fluidized bed furnace, and under the action of bottom fluidization gas, calcium sulfate exists
The Micro Fluid state that fluid is appeared similar in bed, is mixed in heating furnace with carbon material and sulfur-bearing lack of gas according to a certain percentage
After conjunction under the heat effect of other side high-temperature flue gas, calcium sulfate is heated within the temperature range of 800~1200 DEG C, in furnace
Residence time is 10~60s；The solid product that reaction generates is mainly calcium oxide crystal, is discharged from the bottom of heating furnace, sulfuric acid
Inverse formula is integrally showed between calcium and high-temperature flue gas to exchange heat, and can be increased heat transfer temperature difference, be obtained better heat transfer effect；Reaction generates
Gas-phase product be high concentration SO2(SO in gas2Concentration is 5%~30%), gas temperature is between 700~1000 DEG C, through phase
Therefore the optimum temperature section that pass research and document show that this temperature prepares sulphur for carbon thermal reduction it is anti-to be sent to carbon thermal reduction
It answers system that can greatly improve the sulfur purity and conversion ratio of preparation, therefore current reluctant phosphorus stone may be implemented in technology
Cream (CaSO4·2H2) and the regeneration of desulfurized gypsum and SO O2Resource utilization.High concentration SO simultaneously2Gas can also be used to make
Standby raw material of industry sulfuric acid.
Carbon material is added in above-mentioned calcium sulfate pyrolysis process and sulfur-bearing lack of gas are because of according to existing pertinent literature
Prove, the decomposition temperature of calcium sulfate is higher, calcium sulfate could be decomposed completely between 1350 DEG C~1400 DEG C, decomposition temperature compared with
Height is intended to higher energy consumption；But after the reducing substances such as carbon material and sulphur are added, the decomposition temperature of calcium sulfate
It substantially reduces, decomposition temperature is about 800 DEG C~1100 DEG C, greatly reduces material and decomposes energy consumption, reaches energy-saving and emission-reduction and sulphur
The purpose of resource utilization
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Although above-mentioned be described in conjunction with specific embodiment of the attached drawing to the disclosure, model not is protected to the disclosure
The limitation enclosed, those skilled in the art should understand that, on the basis of the technical solution of the disclosure, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within the protection scope of the disclosure.
Claims (10)
1. a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, which is characterized in that including heating furnace body,
The heating furnace body top is equipped with heating furnace top headroom, and heating furnace top headroom is equipped with material inlet and decomposition
Gas vent, the heating furnace body inside are equipped with slot type heat exchanger, material aisle and high-temperature flue gas in the slot type heat exchanger
Aisle is in longitudinally staggered disposition, and material aisle bottom is connected with Micro Fluid bed heating furnace bellows, the Micro Fluid bed heating
Furnace bellows are for providing the fluidized gas for making goods fluid；
Calcium sulfate/the calcium nitrate enters in heat exchanger behind material aisle from material inlet, is under the action of bottom fluidization gas
Reveal Micro Fluid state, then carries out pyrolytic under high-temperature flue gas effect.
2. as described in claim 1 a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, feature exists
In the connectivity part of the Micro Fluid bed heating furnace bellows and material aisle bottom is equipped with fluidization hood, and the fluidization hood is used for
Stabilization fluid gas.
3. as described in claim 1 a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, feature exists
In when carrying out calcium sulfate calcining, the fluidized gas is sulfur-bearing lack of gas, is added with carbon material, the sulphur in the material aisle
Sour calcium carries out pyrolytic, the carbon under high-temperature flue gas effect after mixing according to set proportion with carbon material and sulfur-bearing lack of gas
Material and sulfur-bearing lack of gas for reducing calcium sulfate decomposition temperature；When carrying out calcium nitrate calcining, the fluidized gas be air or
Nitrogen.
4. as described in claim 1 a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, feature exists
In high-temperature flue gas aisle one end is connected with combustor exit, one end and the high temperature cigarette for being set to heating furnace body side
Gas outlet is connected, and the high-temperature flue-gas is 1100 DEG C -1300 DEG C.
5. a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, which is characterized in that including heating furnace body,
Tube bundle heat exchanger is equipped in the heating-furnace body, the tube bundle heat exchanger includes several heat exchanger tubes, the heat exchange tube
Interior is high-temperature flue gas runner, and outer pipe is material flow path, and the material flow path bottom end is equipped with the spouted pipe of fluidized bed, described spouted effective
In penetrating fluidized gas；
After the calcium sulfate/calcium nitrate enters material flow path, Micro Fluid state is showed under the action of bottom fluidization gas, then
Pyrolytic is carried out under high-temperature flue gas effect.
6. as claimed in claim 5 a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, feature exists
In when carrying out calcium sulfate calcining, the fluidized gas is sulfur-bearing lack of gas, is added with carbon material, the sulphur in the material flow path
Sour calcium carries out pyrolytic, the carbon under high-temperature flue gas effect after mixing according to set proportion with carbon material and sulfur-bearing lack of gas
Material and sulfur-bearing lack of gas for reducing calcium sulfate decomposition temperature；When carrying out calcium nitrate calcining, the fluidized gas be air or
Nitrogen.
7. as claimed in claim 5 a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, feature exists
In the heat exchanger tube top is connected with high-temperature flue gas outlet, bottom end and combustion chamber, and the high-temperature flue-gas is
1100℃-1300℃。
8. a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, feature as described in claim 3 or 6
It is, the partial size of the carbon material is 60 μm of -3mm, and the carbon material includes but is not limited to coal dust, activated coke, active carbocoal, work
Property charcoal, carbonized material and graphite.
9. a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, feature as described in claim 3 or 6
It is, the sulfur-bearing lack of gas come from carbon thermal reduction system tail part exhaust, and the sulfur-bearing exhausted temperature is 800 DEG C -1200 DEG C, at
Dividing includes N2, S steam, CO and CO2。
10. as claimed in claim 1 or 5 a kind of for calcined calcium sulfate hemihydrate/calcium nitrate fluidized bed indirect heater, feature
It is, the heating furnace body bottom is equipped with solid decomposition product exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910117113.2A CN109704292B (en) | 2019-02-15 | Fluidized bed indirect heating furnace for calcining calcium sulfate/calcium nitrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910117113.2A CN109704292B (en) | 2019-02-15 | Fluidized bed indirect heating furnace for calcining calcium sulfate/calcium nitrate |
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| Publication Number | Publication Date |
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| CN109704292A true CN109704292A (en) | 2019-05-03 |
| CN109704292B CN109704292B (en) | 2024-05-17 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2063615U (en) * | 1989-10-20 | 1990-10-10 | 云南农业大学 | Metal indirectly heated hot-air furnace with main and secondary heat interchanger |
| CN2702998Y (en) * | 2004-06-18 | 2005-06-01 | 隋川维 | Moisture-containing industrial phosphogypsum calcining furnace |
| JP2011020881A (en) * | 2009-07-15 | 2011-02-03 | Akita Univ | Method for converting calcium sulfate-containing material into calcium oxide and elemental sulfur, and method and system for recycling calcium sulfate-containing material |
| CN102557134A (en) * | 2011-12-23 | 2012-07-11 | 中国科学院过程工程研究所 | Fluidized reduction furnace for producing high-purity vanadium trioxide and production method |
| CN203295370U (en) * | 2013-05-06 | 2013-11-20 | 廊坊三利木业有限公司 | Desulfurized gypsum calcining device |
| CN105651050A (en) * | 2014-10-17 | 2016-06-08 | 湖州浙宝冶金辅料有限公司 | Calcinator for calcining active calcium conveniently |
| CN106745145A (en) * | 2017-01-11 | 2017-05-31 | 江苏德义通环保科技有限公司 | A kind of method and system device that calcium oxide and sulphur are produced from gypsum |
| CN209853729U (en) * | 2019-02-15 | 2019-12-27 | 山东大学 | Fluidized bed indirect heating furnace for calcining calcium sulfate/calcium nitrate |
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2063615U (en) * | 1989-10-20 | 1990-10-10 | 云南农业大学 | Metal indirectly heated hot-air furnace with main and secondary heat interchanger |
| CN2702998Y (en) * | 2004-06-18 | 2005-06-01 | 隋川维 | Moisture-containing industrial phosphogypsum calcining furnace |
| JP2011020881A (en) * | 2009-07-15 | 2011-02-03 | Akita Univ | Method for converting calcium sulfate-containing material into calcium oxide and elemental sulfur, and method and system for recycling calcium sulfate-containing material |
| CN102557134A (en) * | 2011-12-23 | 2012-07-11 | 中国科学院过程工程研究所 | Fluidized reduction furnace for producing high-purity vanadium trioxide and production method |
| CN203295370U (en) * | 2013-05-06 | 2013-11-20 | 廊坊三利木业有限公司 | Desulfurized gypsum calcining device |
| CN105651050A (en) * | 2014-10-17 | 2016-06-08 | 湖州浙宝冶金辅料有限公司 | Calcinator for calcining active calcium conveniently |
| CN106745145A (en) * | 2017-01-11 | 2017-05-31 | 江苏德义通环保科技有限公司 | A kind of method and system device that calcium oxide and sulphur are produced from gypsum |
| CN209853729U (en) * | 2019-02-15 | 2019-12-27 | 山东大学 | Fluidized bed indirect heating furnace for calcining calcium sulfate/calcium nitrate |
Non-Patent Citations (1)
| Title |
|---|
| 人民教育出版社高考用书编辑部组织选编: "《无机化学 下》", 人民教育出版社, pages: 244 * |
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