CN101880032B - Device and method for comprehensively utilizing heat produced by decomposition of phosphorous gypsum in circulating fluid bed - Google Patents
Device and method for comprehensively utilizing heat produced by decomposition of phosphorous gypsum in circulating fluid bed Download PDFInfo
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- CN101880032B CN101880032B CN2010101918277A CN201010191827A CN101880032B CN 101880032 B CN101880032 B CN 101880032B CN 2010101918277 A CN2010101918277 A CN 2010101918277A CN 201010191827 A CN201010191827 A CN 201010191827A CN 101880032 B CN101880032 B CN 101880032B
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- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000012530 fluid Substances 0.000 title claims abstract description 14
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical group [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 11
- 239000010440 gypsum Substances 0.000 title claims abstract description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000003546 flue gas Substances 0.000 claims abstract description 85
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000012298 atmosphere Substances 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 31
- 238000005243 fluidization Methods 0.000 claims description 16
- 239000000779 smoke Substances 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- 230000001351 cycling effect Effects 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000004568 cement Substances 0.000 abstract description 9
- 239000002918 waste heat Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000007865 diluting Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 229910052925 anhydrite Inorganic materials 0.000 abstract 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 33
- 239000002994 raw material Substances 0.000 description 9
- 239000003245 coal Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 101100400378 Mus musculus Marveld2 gene Proteins 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000007405 data analysis Methods 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000007600 charging Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a device and a method for comprehensively utilizing heat produced by decomposition of phosphorous gypsum in a circulating fluid bed, namely, a novel fluidizing air supply device of an integrated device for utilizing the waste heat of a phosphorous gypsum decomposition circulating fluid bed and a method for reducing energy consumption and enhancing CaSO4 decomposition rate and SO2 concentration in the process of coproducing cement clinker and sulfuric acid by decomposing the phosphorous gypsum through the circulating fluid bed. A fluidizing air source consisting of air serving as a primary component and main circulating flue gas serving as a secondary component is adopted, a material is fed into a main furnace of the circulating fluid bed under the action of the gasforce of circularly flowing flue gas and corresponding reformation is performed on an exhaust pipeline so as to fulfill the aim of exhausting and circulating the flue gas. A reaction atmosphere in the fluid bed can be controlled effectively and the phosphorous gypsum is decomposed under the condition of reduction-oxidation atmosphere, so that the decomposition efficiency of the phosphorous gypsumis improved. The comprehensive utilization of circulating flue gas having waste heat reduces energy loss in an air heating and material delivering process and further saves energy sources. Simultaneously, the circulating flue gas weakens the diluting effect of the fluidizing air on SO2 instead of a part of air, so that the aim of obtaining high-concentration SO2 is fulfilled.
Description
Technical field
The present invention relates to a kind of fluidized wind feeding mechanism and air supply mode of phosphogypsum Decomposition Cycle fluidized-bed UTILIZATION OF VESIDUAL HEAT IN integrated apparatus; Especially utilizing produced by decomposition of phosphorous gypsum in circulating fluid bed thermolysis comprehensive utilization, fluidized wind feeding mechanism energy-conservation, circular fluid bed efficiently, belong to the reclamation of solid wastes equipment technical field.
Technical background
Phosphogypsum is the industrial residue that produces in the production process of phosphoric acid, staple CaSO
4China's phosphogypsum quantity discharged has reached 3,000 ten thousand t/a at present.Phosphogypsum is stacked and is taken a large amount of soils, solubility P wherein
2O
5With objectionable constituent such as fluorochemical through the diffusion of water body ambient, soil, water, atmosphere are caused severe contamination.Therefore, ardealite innocent is handled and comprehensive utilization becomes solid waste disposal disposal and resource utilization hot research fields, also is pressing for of phosphorous chemical industry sustainable development.At present, utilize phosphogypsum to decompose and produce the main development trends that cement clinker co-producing sulfuric acid technology has become a large amount of utilizations of phosphogypsum.Along with the development of circulating fluidized bed technique, people's tendency utilizes this technology to realize that phosphogypsum decomposes the purpose of producing the cement clinker co-producing sulfuric acid.
Burning device of circulating fluidized bed is the chemical plant installations that utilizes the combustion principle of Dual-Phrase Distribution of Gas olid to react, and it mainly comprises fluid bed reacting tower, air supply device, gas-solid separator, charging and material returning device, interchanger etc.Present fluidized wind air feed mainly is divided into two portions; The one, the main body air feed part (wind) of air distribution plate below; The 2nd, the auxiliary air supply of epimere part (secondary air and tertiary air) in the body of heater, the basic demand that the two cooperates air feed to operate with the needs that satisfy fuel combustion and fluidisation.A wind of traditional fluidized-bed process is directly to provide to satisfy the needs of bottom fuel combustion and fluidized state through gas blower, is equipped with auxiliary air supply and carries out fluidized bed process.And the fluidized-bed reactor decomposing phosphogypsum is produced higher phosphogypsum rate of decomposition of the processing requirement of cement clinker co-producing sulfuric acid and stable high density SO
2Therefore source of the gas needs the strict control of the reaction atmosphere in the reactor drum so that realize the requirement of this technology.But traditional air supply device and mode are a large amount of air that blasts, and are unfavorable for forming weak reduction one bis oxide atmospheric condition, therefore to the decomposition and the SO of phosphogypsum
2Concentration etc. have a negative impact.It mainly shows is to get in the main stove for the needs of keeping fluidized state and fuel combustion will blast a large amount of fluidization airs, causes in the process that phosphogypsum decomposes that hypomere can't form decomposition and the SO that stable weak reductive condition is unfavorable for phosphogypsum in the bed body
2Generation, simultaneously a large amount of air also make SO
2Concentration reduces because of dilution, has increased the difficulty and the cost of follow-up acid-making process.Utility model patent CN201261720Y discloses a kind of phosphogypsum Decomposition Cycle fluidized-bed UTILIZATION OF VESIDUAL HEAT IN integrated apparatus, and its applied fluidized wind feeding mechanism use primary air fan and overfire air fan that promptly the typical case is traditional cooperate with the air supply device of air as the fluidisation source of the gas.Patent of invention CN117084C discloses a kind of device that fluidized wind is provided, and the fluidized wind device of its use is the improved device that primary air fan cooperates with the secondary booster fan, and fluidization air gets into the bed body and carries out the fluidisation operation behind the external placed type preheater.Patent of invention CN1389663A discloses a kind of a kind of method that fluidized wind is provided, and it is through increasing the secondary booster fan fluidized wind of low discharge, high pressure to be provided to on-mechanical formula gas-solid valve or external heat exchanger.
Summary of the invention
Produce the subject matter that cement clinker co-producing sulfuric acid technology exists to utilizing produced by decomposition of phosphorous gypsum in circulating fluid bed at present; The technical problem that the present invention solved provides a kind of novel fluidized wind air supply device and air supply mode, reaches phosphogypsum high de-agglomeration rate, less energy-consumption, stable high density SO
2The purpose of source of the gas.
A kind of heat produced by decomposition of phosphorous gypsum in circulating fluid bed comprehensive utilization device of the present invention and method are to adopt following technical scheme to realize; Comprise smoke circulating device, air-blast device, auxiliary air supply device; It is characterized in that: cyclone drying high-temperature separator (4) below at circulating fluidized bed installs flue gas recirculation air inlet regulation device additional; And make the exhaust side of smoke discharging pipe into two channel-style pipelines; Flue gas recirculation air inlet regulation device and gas blower (1) are the fluidisation source of the gas with circulating flue gas and air; And utilizing circulating flue gas to implement the air conveying of material, said flue gas recirculation air inlet regulation device is made up of stopping valve (5), circulating flue gas pipeline (6), vacuum breaker (7), flue gas surge tank (8), circulating air compressor (9).
Adopting air is the fluidized wind source of the gas of assisting for the major cycle flue gas; And utilize the air conveying material of cycling stream flue gas to send in the fluidized-bed master stove; Cyclone drying high-temperature separator (4) below at circulating fluidized bed installs flue gas recirculation air inlet regulation device additional; Flue gas recirculation air inlet regulation device and gas blower (1) are the fluidisation source of the gas with circulating flue gas and air, and utilize circulating flue gas to implement the air conveying of material, make the exhaust side of smoke discharging pipe into two channel-style pipelines; Cooperate auxiliary air supply to control the reaction atmosphere of hypomere in the fluidized-bed with the week reduction flue gas that contains CO, vertically form redox atmosphere at main furnace interior.
Described flue gas recirculation air inlet regulation device is made up of stopping valve (5), circulating flue gas pipeline (6), vacuum breaker (7), flue gas surge tank (8), circulating air compressor (9).
The novel fluidized wind feeding mechanism of phosphogypsum Decomposition Cycle fluidized-bed UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention; Its smoke discharging pipe with circulating fluidized bed transform smoke evacuation and the pipeline of circulation double-purpose as and below cyclonic separator 4, installs devices such as stopping valve 5, circulating flue gas pipeline 6, vacuum breaker 7, flue gas surge tank 8, circulating air compressor 9 additional and flue gas and strength are driven recycle stock carries and become owner of in the stove conveying operations that carries out fluidisation and recycle stock with alternative part fluidization air, has so promptly reduced the fluidized wind total amount to SO
2Dilution, fume afterheat is effectively used, mass transport is more happy and reduced the transmission energy consumption.Simultaneously contain portion C O because of circulating flue gas, it can form longitudinally reduction-oxidation reaction atmosphere and be more conducive to phosphogypsum and effectively decompose and obtain high density SO in main stove
2Source of the gas and high-quality cement clinker.Its infrastructure investment of the present invention has a little increase but to improving the phosphogypsum decomposition efficiency, obtaining stable high density SO
2There is positive effect source of the gas and high-quality cement clinker and the aspect that cuts down the consumption of energy.From economy and this fluidized wind feeding mechanism of industriallization angle analysis and air supply mode is the fluidized wind feeding mechanism of the phosphogypsum Decomposition Cycle fluidized-bed UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of both economical practicality.
The present invention has following beneficial effect:
1, the present invention is different with the fluidized wind feeding mechanism and the air supply mode of traditional fluidized-bed.Traditional fluidized wind supply is to adopt gas blower that air is sent into main stove, and improved fluidized wind feeding mechanism is that devices such as employing circulating flue gas regulation device and gas blower are the fluidized wind method of supplying of the collaborative air feed of fluidisation source of the gas with flue gas and air.
2, the present invention adopts novel fluidized wind air supply device and air supply mode will have the direct recycle of flue gas of waste heat on phosphogypsum Decomposition Cycle fluidized-bed UTILIZATION OF VESIDUAL HEAT IN integrated apparatus basis; Utilize mode more effectively can practice thrift the more energy than waste heat heat exchange, also make the construction of partial devices and safeguard convenient simultaneously.
3, the present invention sends weak reduction flue gas into main stove and can better control reaction atmosphere in the stove and make phosphogypsum that higher rate of decomposition arranged and obtain stable high density SO in implementation process
2Source of the gas and high-quality cement clinker.
4, the present invention utilizes the air conveying recycle stock of circulating flue gas in implementation process, has promptly practiced thrift the energy and has guaranteed effectively that also the conveying of recycle stock is unimpeded.
Description of drawings
Fig. 1 is circulating fluidized bed device figure of the present invention.
Wherein: gas blower 1, circulating fluidized bed reaction tower 2, high temperature cyclone separator 3, cyclone drying high-temperature separator 4, stopping valve 5, circulating flue gas discharge tube 6, vacuum breaker 7, gas buffer jar 8 and circulating air compressor 9 and other indispensable accessory structure.
Embodiment
With instance further explain flesh and blood of the present invention, but content of the present invention is not limited to this below in conjunction with accompanying drawing.
The present invention adopts air to be the fluidized wind source of the gas of assisting for the major cycle flue gas and to utilize the air conveying material of cycling stream flue gas to send in the fluidized-bed master stove, simultaneously smoke discharging pipe is carried out corresponding transformation so that realize the discharging and the circulation dp of flue gas.The novel fluidized wind feeding mechanism of phosphogypsum Decomposition Cycle fluidized-bed UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, it mainly comprises smoke circulating device, air-blast device, auxiliary air supply device etc.Be primarily characterized in that; Below the cyclone drying high-temperature separator 4 of circulating fluidized bed, install devices such as stopping valve 5, circulating flue gas pipeline 6, vacuum breaker 7, flue gas surge tank 8, circulating air compressor 9 additional flue gas recirculation air inlet regulation device and gas blower 1 are the fluidisation source of the gas with circulating flue gas and air and utilize circulating flue gas to implement the air conveying of material that the exhaust side with smoke discharging pipe makes two channel-style pipelines into so that realize flue gas recirculation and smoke evacuation dual-use function simultaneously.
The flue gas that utilizes circulating air compressor will be partly with waste heat is sent in the main stove and air conveying material,
The total amount that reduces fluidized wind is to reduce SO
2The dilution of concentration also cuts down the consumption of energy.
Week reduction flue gas (containing certain density CO) cooperates auxiliary air supply can effectively control the reaction atmosphere of hypomere in the fluidized-bed, vertically forms reduction one oxidizing atmosphere at main furnace interior, makes phosphogypsum efficiently decompose and obtain the SO of high density
2With high-quality cement clinker.
See also shown in Figure 1; The required wind of burning device of circulating fluidized bed is provided by primary air fan 1 and the circulating flue gas regulation device be made up of devices such as stopping valve 5, circulating flue gas pipeline 6, vacuum breaker 7, flue gas surge tank 8 and circulating air compressors 9 jointly, gets in the stove through bottom and Material pipeline respectively.Secondary air is sent in the stove from burner hearth sidewall by overfire air fan.Flue gas surge tank 8 plays the balance air-flow.At the beginning of operation; Start igniting and warming temperature that primary air fan 1 carries out main stove; After reaching stable burning, beginning to adjust primary air fan 1, stopping valve 5 and 9 pairs of fluidization airs of recycle compressor and flue gas adjusts; Under the prerequisite that does not influence normal operation, send into the flue gas of expectation amount in the main stove and be warming up to service temperature, subsequently via the operation splitting of spiral dry feed device 4 chargings carrying out phosphogypsum.
Embodiment 1
Raw material 1 phosphogypsum
The staple of phosphogypsum sees the following form
| Composition | SO 3 | CaO | SiO 2 | Al 2O 3 | Fe 2O 3 | MgO | Total P 2O 5 | Total F | Na 2O | K 2O | Moisture |
| Content (%) | 40.86 | 29.82 | 9.43 | 0.236 | 0.132 | 0.055 | 1.17 | 0.52 | 0.043 | 0.086 | 9.65 |
Raw material 2 raw coal
The raw coal carbon content is 63.9%, and ash content is 28.67%, and thermal value is 24.22MJ/kg, and raw material is adopted in the Chuxiong, Yunnan.
Implementation method:
Keeping under normal running temperature (1000～1200 ℃) condition, by 930kg/h phosphogypsum evenly is being transported in the fluidized-bed through the dry feed appliance of spiral, the fluidized wind air quantity is 700～800m
3/ h, flue gas recirculation amount 10%, after the roasting that repeatedly circulates, its grog is mainly CaO, contains the SO of high density in the flue gas
2
Result of implementation:
Grog composition and fume component analysis are following:
The binding data analysis can be known CaSO
4Rate of decomposition is about 81.2%, SO
2Volume(tric)fraction is 16.00%.
Embodiment 2
Raw material 1 phosphogypsum
The staple of phosphogypsum sees the following form
| Composition | SO 3 | CaO | SiO 2 | Al 2O 3 | Fe 2O 3 | MgO | Total P 2O 5 | Total F | Na 2O | K 2O | Moisture |
| Content (%) | 40.86 | 29.82 | 9.43 | 0.236 | 0.132 | 0.055 | 1.17 | 0.52 | 0.043 | 0.086 | 9.65 |
Raw material 2 raw coal
The raw coal carbon content is 73.9%, and ash content is 28.67%, and thermal value is 24.22MJ/kg, and raw material is adopted in the Chuxiong, Yunnan.
Implementation method:
Keeping under normal running temperature (1000～1200 ℃) condition, by 930kg/h phosphogypsum evenly is being transported in the fluidized-bed through the dry feed appliance of spiral, the fluidized wind air quantity is 700～800m
3/ h, flue gas (120～200 ℃) internal circulating load is 20%, after the roasting that repeatedly circulates, its grog is mainly CaO, contains the SO of high density in the flue gas
2
Result of implementation
Grog composition and fume component analysis are following:
The binding data analysis can be known CaSO
4Rate of decomposition is 85.18%, SO
2Volume(tric)fraction is 16.03%.
Embodiment 3
Raw material 1 phosphogypsum
The staple of phosphogypsum sees the following form
| Composition | SO 3 | CaO | SiO 2 | Al 2O 3 | Fe 2O 3 | MgO | Total P 2O 5 | Total F | Na 2O | K 2O | Moisture |
| Content (%) | 40.86 | 29.82 | 9.43 | 0.236 | 0.132 | 0.055 | 1.17 | 0.52 | 0.043 | 0.086 | 9.65 |
Raw material 2 raw coal
The raw coal carbon content is 63.9%, and ash content is 28.67%, and thermal value is 24.22MJ/kg, and raw material is adopted in the Chuxiong, Yunnan.
Implementation method:
Keeping under normal running temperature (1000～1200 ℃) condition, by 930kg/h phosphogypsum evenly is being transported in the fluidized-bed through the dry feed appliance of spiral, the fluidized wind air quantity is 700～800m
3/ h, flue gas (120～200 ℃) internal circulating load is 30%, after the roasting that repeatedly circulates, its grog is mainly CaO, contains the SO of high density in the flue gas
2
Result of implementation
Grog composition and fume component analysis are following:
The binding data analysis can be known CaSO
4Rate of decomposition is 90.25%, SO
2Volume(tric)fraction is 16.09%.
The present invention can effectively control the reaction atmosphere in the fluidized-bed, phosphogypsum is decomposed under the redox atmospheric condition and then improves its decomposition efficiency.The comprehensive utilization that has the circulating flue gas of waste heat has reduced the energy waste of air heating and material conveying process and then has practiced thrift the energy, and circulating flue gas has substituted part air reduction fluidized wind to SO simultaneously
2Diluting effect realized obtaining high density SO
2Purpose.
Claims (2)
1. heat produced by decomposition of phosphorous gypsum in circulating fluid bed comprehensive utilization device; Comprise smoke circulating device, air-blast device, auxiliary air supply device; It is characterized in that: cyclone drying high-temperature separator (4) below at circulating fluidized bed installs flue gas recirculation air inlet regulation device additional; And make the exhaust side of smoke discharging pipe into two channel-style pipelines; Flue gas recirculation air inlet regulation device and gas blower (1) are the fluidisation source of the gas with circulating flue gas and air, and utilize circulating flue gas to implement the air conveying of material, and said flue gas recirculation air inlet regulation device is made up of stopping valve (5), circulating flue gas pipeline (6), vacuum breaker (7), flue gas surge tank (8), circulating air compressor (9);
Adopting air is the fluidized wind source of the gas of assisting for the major cycle flue gas; And utilize the air conveying material of cycling stream flue gas to send in the fluidized-bed master stove; Cyclone drying high-temperature separator (4) below at circulating fluidized bed installs flue gas recirculation air inlet regulation device additional; Flue gas recirculation air inlet regulation device and gas blower (1) are the fluidisation source of the gas with circulating flue gas and air, and utilize circulating flue gas to implement the air conveying of material, make the exhaust side of smoke discharging pipe into two channel-style pipelines; Cooperate auxiliary air supply to control the reaction atmosphere of hypomere in the fluidized-bed with the week reduction flue gas that contains CO, vertically form redox atmosphere at main furnace interior.
2. heat produced by decomposition of phosphorous gypsum in circulating fluid bed method of comprehensive utilization; Comprise smoke circulating device, air-blast device, auxiliary air supply device; It is characterized in that: cyclone drying high-temperature separator (4) below at circulating fluidized bed installs flue gas recirculation air inlet regulation device additional; And make the exhaust side of smoke discharging pipe into two channel-style pipelines; Flue gas recirculation air inlet regulation device and gas blower (1) are the fluidisation source of the gas with circulating flue gas and air, and utilize circulating flue gas to implement the air conveying of material, and said flue gas recirculation air inlet regulation device is made up of stopping valve (5), circulating flue gas pipeline (6), vacuum breaker (7), flue gas surge tank (8), circulating air compressor (9);
Adopting air is the fluidized wind source of the gas of assisting for the major cycle flue gas; And utilize the air conveying material of cycling stream flue gas to send in the fluidized-bed master stove; Cyclone drying high-temperature separator (4) below at circulating fluidized bed installs flue gas recirculation air inlet regulation device additional; Flue gas recirculation air inlet regulation device and gas blower (1) are the fluidisation source of the gas with circulating flue gas and air, and utilize circulating flue gas to implement the air conveying of material, make the exhaust side of smoke discharging pipe into two channel-style pipelines; Cooperate auxiliary air supply to control the reaction atmosphere of hypomere in the fluidized-bed with the week reduction flue gas that contains CO, vertically form redox atmosphere at main furnace interior.
Priority Applications (1)
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|---|---|---|---|
| CN2010101918277A CN101880032B (en) | 2010-06-04 | 2010-06-04 | Device and method for comprehensively utilizing heat produced by decomposition of phosphorous gypsum in circulating fluid bed |
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|---|---|---|---|
| CN2010101918277A CN101880032B (en) | 2010-06-04 | 2010-06-04 | Device and method for comprehensively utilizing heat produced by decomposition of phosphorous gypsum in circulating fluid bed |
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| CN101386464A (en) * | 2008-10-29 | 2009-03-18 | 中国科学院工程热物理研究所 | Anhydration and incineration processing method for wet sludge |
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