CN107670491A - Improve the device of fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke - Google Patents
Improve the device of fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke Download PDFInfo
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- CN107670491A CN107670491A CN201711038164.3A CN201711038164A CN107670491A CN 107670491 A CN107670491 A CN 107670491A CN 201711038164 A CN201711038164 A CN 201711038164A CN 107670491 A CN107670491 A CN 107670491A
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- absorption tower
- fluidized bed
- circulating fluidized
- return mechanism
- desulfurization system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
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- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of device for improving fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke, fume circulating fluidized bed desulfurization system includes the pre-duster being sequentially connected, absorption tower, reduster and chimney, the slaking silos for adding absorbent are also accessed on smoke conveying duct between pre-duster and absorption tower, absorption tower is also connected with spraying it desuperheat water lines of desuperheating water, the bottom dust outlet of reduster also returns to connection absorption tower by air flume, pumping flue gas pipeline is also drawn in the smoke outlet of pre-duster and connects air flume upper end, also draw gas bypass and connect adsorption tower smoke entrance in air flume lower end.Compared with prior art, the present invention effectively can prevent recycle stock from condensing using high-temperature flue gas conveying recycle stock is evacuated, meanwhile the flue-gas temperature into absorption tower is also reduced, save spray water flux, in addition, also improving the time of contact of flue gas and absorbent, desulfuration efficiency etc. is improved.
Description
Technical field
The present invention relates to flue gas desulfurization field, improves flue gas circulating fluidized bed desulfurization using heat smoke more particularly, to one kind
The device of system material return mechanism characteristic.
Background technology
Most of flue gas desulfurizations both at home and abroad at present all use Limestone-gypsum Wet Flue Gas Desulfurization Process technique, wet desulfurizing process tool
There is the advantages that desulfuration efficiency is high, stable equipment operation.But wet desulphurization equipment is complicated, cost of investment is high, is used for large-scale fire
Group of motors.For the miniature boilers such as biomass, waste incineration, industrial exhaust heat, cost of investment is too high.
Circulating fluidized bed dry sulfur removal technology is from a kind of desulfurization by dry method for coming of circulating fluidized bed technique development, phase
For conventional wet desulfurization, circulating fluidized bed dry sulfur removal technology has the advantages that cost of investment is low, and occupation area of equipment is small,
It is the only choosing of the arcola flue gas desulfurization such as biomass, waste incineration, industrial exhaust heat.
The solid particle that traditional Analyss of Desulphurization Technology of Flue Gas Recirculation Fluid-bad falls reduster sends back to absorption tower circulation profit
With utilization, but as material by air flume is transported to absorption tower, temperature gradually reduces, and reaches dew-point temperature, causes material
Moisture cake, air flume is blocked, absorption tower bed cannot be supplemented, and bed body is caved in, and desulfuration efficiency is greatly reduced.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is changed using heat smoke
The device of kind fume circulating fluidized bed desulfurization system material return mechanism characteristic.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of device for improving fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke, flue gas recirculation stream
Fluidized bed desulfurizing system includes pre-duster, the absorption tower, again being sequentially connected according to flow of flue gas direction by smoke conveying duct
Deduster and chimney, the digestion for adding absorbent is also accessed on the smoke conveying duct between pre-duster and absorption tower
Storehouse, described absorption tower are also connected with spraying it desuperheat water lines of desuperheating water, the bottom dust outlet of described reduster
Connection absorption tower (i.e. material return mechanism) is also returned to by air flume, pumping flue gas is also drawn in the smoke outlet of pre-duster
Pipeline simultaneously connects the air flume upper end, and the air flume lower end also draws gas bypass and accesses connection adsorption tower smoke
The smoke conveying duct of entrance.
Preferably, the dust outlet of described pre-duster bottom also connects the slaking silos by dust pipeline.
Preferably, described air flume inner shell is divided into upper shell and lower house using air-permeable layer, wherein, upper casing
The upper end of body is provided with the chute feed mouth of connection reduster bottom dust outlet, and lower end, which is provided with, connects the oblique of the gas bypass
Groove gas outlet, the upper end of lower house are provided with the skewed slot air inlet for connecting the pumping flue gas pipeline.
It is furthermore preferred that at the Venturi exit on the lower end discharging opening connection absorption tower of the upper shell of described air flume
Negative pressure position.
Preferably, described pumping flue gas pipeline is provided with air blower and controls the second control valve of its rate of air sucked in required.
Preferably, the bottom dust outlet of described reduster is also connected with accessory substance storehouse.
Preferably, described desuperheat water lines include desuperheat water tank and desuperheat water pump, wherein, the delivery port of desuperheat water pump leads to
In over-subtraction warm water tube access absorption tower.
It is furthermore preferred that it is additionally provided with atomizer in the end of desuperheat water pipe.
Preferably, described absorbent is basic anhydride or alkaline hydrated oxide, and it is selected from calcium oxide, magnesia, hydrogen
One or more of combinations of calcium oxide or magnesium hydroxide etc..
Preferably, described absorption tower outlet and the connecting pipe of reduster, the dust outlet pipeline of reduster with
And air flume is laid with heat-insulation layer.
Compared with prior art, the present invention has advantages below：
(1)：Use the recycle stock of high warm flue gas conveying air flume.By extracting part heat out after pre-duster
Flue gas is used for the conveying wind as air flume, air flume is in a higher temperature, prevents material from condensing,
Still further aspect, pumping flue gas convey recycle stock after, temperature reduction, then by gas bypass send back in absorption tower with former cigarette
After gas mixing so that the flue-gas temperature into absorption tower reduces, and saves spray water flux.In addition, pumping flue gas is in conveying recycle
While material, also contacted with absorbent, add the time of contact of flue gas and absorbent, improve desulfuration efficiency.
(2)：Pre-duster is combined with reduster.Pre-duster is first passed through by solid particulate matter in non-purified flue gas
Removing, on absorption tower, outlet is again separated desulfurizing byproduct into accessory substance storehouse by reduster, is advantageous to desulfurization pair
The comprehensive utilization of product.
(3)：Using the dust removed in pre-duster as quicklime slaking additive, make full use of CaO in dust,
The alkaline matters such as MgO, while the addition of the molecule such as dust, are advantageous to SO in absorption tower2Removing, improve desulfuration efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the device of the present invention；
Fig. 2 is the structural representation of the air flume of the present invention；
In figure, 1- pre-dusters, 2- slaking silos, the control valves of 3- first, the control valves of 4- second, 5- desuperheat water tanks, 6- absorptions
Tower, 7- redusters, 8- air blowers, 9- desuperheat water pumps, 10- accessory substances storehouse, 11- chimneys, 12- air flumes, 13- upper shells,
14- lower houses, 15- air-permeable layers.
Embodiment
A kind of device for improving fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke, flue gas recirculation stream
Fluidized bed desulfurizing system include be sequentially connected according to flow of flue gas direction by smoke conveying duct pre-duster 1, absorption tower 6,
Reduster 7 and chimney 11, also access on the smoke conveying duct between pre-duster 1 and absorption tower 6 and absorbed for adding
The slaking silos 2 of agent, absorption tower 6 are also connected with spraying it desuperheat water lines of desuperheating water, and the bottom dust outlet of reduster 7 is also
Connection absorption tower 6 is returned to by air flume 12, pumping flue gas pipeline is also drawn in the smoke outlet of pre-duster 1 and connects
The upper end of air flume 12, the lower end of air flume 12 also draw gas bypass and access connection the smoke inlet of absorption tower 6 flue gas it is defeated
Send pipeline.
As a kind of preferred embodiment of the present invention, the dust outlet of the bottom of pre-duster 1 also passes through dust pipeline
Connect slaking silos 2.So flue gas first passes around pre-duster 1 and purified, and removes the flying dusts such as the dust of the inside, a part of from pre- dedusting
The bottom of device 1 is discharged, and another part (flying dust) is sent into slaking silos 2 and is used as additive.First control can also be set in dust pipeline
Valve 3 processed adds the amount of flying dust to control.Due to that can change containing alkaline matter, the additions of flying dust such as CaO, MgO in removing flying dust
The characteristic of kind absorbent, be advantageous to improve desulfuration efficiency so adding a part of flying dust.Slaking silos 2 are the slaking silos 2 of absorbent,
Can be CaO, MgO, etc. alkaline matter slaking silos 2.
As a kind of preferred embodiment of the present invention, on the inner shell of air flume 12 is divided into using air-permeable layer 15
Housing 13 and lower house 14, wherein, the upper end of upper shell 13 is provided with the chute feed of the connection bottom dust outlet of reduster 7
Mouthful, lower end is provided with the skewed slot gas outlet of connection gas bypass, and the upper end of lower house 14 is provided with the skewed slot of connection pumping flue gas pipeline
Air inlet.It is furthermore preferred that at the Venturi exit on the lower end discharging opening connection absorption tower 6 of the upper shell 13 of air flume 12
Negative pressure position, be advantageous to the circulation of material.
As a kind of preferred embodiment of the present invention, pumping flue gas pipeline is provided with air blower 8 and controls its pumping
Second control valve 4 of amount.Second control valve 4 is used for controlling rate of air sucked in required, makes have enough fluidisations in the lower house 14 of air flume 12
Wind, make solid circle particle fluidization, under gravity, return to absorption tower 6.
As a kind of preferred embodiment of the present invention, the bottom dust outlet of reduster 7 is also connected with accessory substance storehouse
10。
As a kind of preferred embodiment of the present invention, desuperheat water lines include desuperheat water tank 5 and desuperheat water pump 9, its
In, the delivery port of desuperheat water pump 9 is accessed in absorption tower 6 by desuperheat water pipe.It is furthermore preferred that it is additionally provided with the end of desuperheat water pipe
Atomizer.
As a kind of preferred embodiment of the present invention, absorbent is basic anhydride or alkaline hydrated oxide, its its
One or more of combinations selected from calcium oxide, magnesia, calcium hydroxide or magnesium hydroxide.
As a kind of preferred embodiment of the present invention, absorption tower 6 export with the connecting pipe of reduster 7, remove again
The dust outlet pipeline and air flume 12 of dirt device 7 are laid with heat-insulation layer.
In the present invention, the flue gas after the purification of pre-duster 1, it is oblique that an extraction part is used as pumping heat smoke to be sent into air
In groove 12, the most of charging aperture of upper shell 13 from air flume 12 of solid particulate matter that reduster 7 removes is fed, fraction
It is recovered to accessory substance storehouse 10.Pumping heat smoke is blown into lower house 14 by ad hoc air blower 8, and passes through the air-permeable layer for the hole that gathers
15 are distributed between material particles, material is carried out fluidization to change the angle of friction of material, the edge with its formation flow regime
Gradient glides, and is transmitted back to absorption tower 6, participates in circulation.Air outlet of the pumping flue gas again from the lower end of upper shell 13 returns to absorption tower 6 and entered
Mouthful, absorption tower 6 is entered after being mixed with former flue gas.Using said structure design, air flume 12 is on the one hand set to be in one higher
Temperature, prevent material from condensing, still further aspect, pumping flue gas convey recycle stock after, temperature reduction, send absorption tower 6 back to
In mixed with former flue gas after, into absorption tower 6 flue-gas temperature reduce, save spray water flux.Meanwhile it is evacuated flue gas and is followed in conveying
While ring material, due to also contains absorbent in the solid particulate matter of circulation, such flue gas also contacts with absorbent, increase
Time of contact of flue gas and absorbent, improve desulfuration efficiency.
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of device for improving fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke, its structure is as schemed
Shown in 1, fume circulating fluidized bed desulfurization system is pre- including being sequentially connected according to flow of flue gas direction by smoke conveying duct
Deduster 1, absorption tower 6, reduster 7 and chimney 11, on the smoke conveying duct between pre-duster 1 and absorption tower 6 also
The slaking silos 2 for adding absorbent are accessed, absorbent is basic anhydride, can be one kind or two of calcium oxide or magnesia
The combination of kind.The dust outlet of the bottom of pre-duster 1 also connects slaking silos 2 by dust pipeline.
Absorption tower 6 is also connected with spraying it desuperheat water lines of desuperheating water, and desuperheat water lines include desuperheat water tank 5 and desuperheat
Water pump 9, wherein, the delivery port of desuperheat water pump 9 is accessed in absorption tower 6 by desuperheat water pipe.It is additionally provided with the end of desuperheat water pipe
Atomizer.
The bottom dust of reduster 7 is most of to return to connection absorption tower 6, fraction dust granules by air flume 12
Thing is sent into accessory substance storehouse 10 by pipeline.
Pumping flue gas pipeline is also drawn in the smoke outlet of pre-duster 1 and connects the upper end of air flume 12, is evacuated cigarette
Air pipe is provided with air blower 8 and controls the second control valve 4 of its rate of air sucked in required.Also draw gas bypass simultaneously in the lower end of air flume 12
The smoke conveying duct of the access connection smoke inlet of absorption tower 6.As shown in Fig. 2 the inner shell of air flume 12 uses air-permeable layer
15 are divided into upper shell 13 and lower house 14, wherein, the upper end of upper shell 13 is provided with the connection bottom dust outlet of reduster 7
Chute feed mouth, lower end are provided with the skewed slot gas outlet of connection gas bypass, and the upper end of lower house 14 is provided with connection pumping fume pipe
The skewed slot air inlet on road.At the Venturi exit on the lower end discharging opening connection absorption tower 6 of the upper shell 13 of air flume 12
Negative pressure position.
In addition, the outlet of absorption tower 6 and connecting pipe, the dust outlet pipeline and air of reduster 7 of reduster 7
Skewed slot 12 is laid with heat-insulation layer.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using invention.
Person skilled in the art obviously can easily make various modifications to these embodiments, and described herein general
Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to above-described embodiment, ability
Field technique personnel do not depart from improvement that scope made and modification all should be the present invention's according to the announcement of the present invention
Within protection domain.
Claims (10)
1. a kind of device for improving fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke, flue gas recirculation fluidisation
Bed desulphurization system includes pre-duster (1), absorption tower (6) being sequentially connected according to flow of flue gas direction by smoke conveying duct
With reduster (7), also access on the smoke conveying duct between pre-duster (1) and absorption tower (6) and absorbed for adding
The slaking silos (2) of agent, described absorption tower (6) are also connected with setting the desuperheat water lines for spraying it desuperheating water, and described removes again
The bottom dust outlet of dirt device (7) also returns to connection absorption tower (6) by air flume (12), and forms material return mechanism, and it is special
Sign is, also draws pumping flue gas pipeline in the smoke outlet of pre-duster (1) and connects the air flume (12) upper end,
Also draw gas bypass and access the smoke conveying duct of connection absorption tower (6) smoke inlet in air flume (12) lower end.
2. one kind according to claim 1 improves fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke
Device, it is characterised in that the dust outlet of described pre-duster (1) bottom also connects the slaking silos by dust pipeline
(2)。
3. one kind according to claim 1 improves fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke
Device, it is characterised in that described air flume (12) inner shell using air-permeable layer (15) be divided into upper shell (13) and
Lower house (14), wherein, the upper end of upper shell (13) is provided with the chute feed mouth of connection reduster (7) bottom dust outlet,
Lower end is provided with the skewed slot gas outlet for connecting the gas bypass, and the upper end of lower house (14), which is provided with, connects the pumping flue gas pipeline
Skewed slot air inlet.
4. one kind according to claim 3 improves fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke
Device, it is characterised in that the text of lower end discharging opening connection absorption tower (6) of the upper shell (13) of described air flume (12)
The negative pressure position in venturi exit.
5. one kind according to claim 1 improves fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke
Device, it is characterised in that described pumping flue gas pipeline be provided with air blower (8) and control its rate of air sucked in required the second control valve
(4)。
6. one kind according to claim 1 improves fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke
Device, it is characterised in that the bottom dust outlet of described reduster (7) is also connected with accessory substance storehouse (10).
7. one kind according to claim 1 improves fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke
Device, it is characterised in that described desuperheat water lines include desuperheat water tank (5) and desuperheat water pump (9), wherein, desuperheat water pump
(9) delivery port passes through in desuperheat water pipe access absorption tower (6).
8. one kind according to claim 7 improves fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke
Device, it is characterised in that be additionally provided with atomizer in the end of desuperheat water pipe.
9. one kind according to claim 1 improves fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke
Device, it is characterised in that described absorbent is basic anhydride or alkaline hydrated oxide, its be selected from calcium oxide, magnesia,
One or more of combinations of calcium hydroxide or magnesium hydroxide.
It is 10. according to claim 1 a kind of special using heat smoke improvement fume circulating fluidized bed desulfurization system material return mechanism
Property device, it is characterised in that the connecting pipe of described absorption tower (6) outlet and reduster (7), reduster (7)
Dust outlet pipeline and air flume (12) are laid with heat-insulation layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711038164.3A CN107670491A (en) | 2017-10-24 | 2017-10-24 | Improve the device of fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke |
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| CN201711038164.3A CN107670491A (en) | 2017-10-24 | 2017-10-24 | Improve the device of fume circulating fluidized bed desulfurization system material return mechanism characteristic using heat smoke |
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| CN108636095A (en) * | 2018-07-27 | 2018-10-12 | 上海电力学院 | It is a kind of to integrate spraying, spray, charged flue gas desulfurization experiment device |
| CN113304585A (en) * | 2021-05-22 | 2021-08-27 | 北京铝能清新环境技术有限公司 | Semi-dry desulfurization system suitable for low-sulfur flue gas |
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| CN113304585A (en) * | 2021-05-22 | 2021-08-27 | 北京铝能清新环境技术有限公司 | Semi-dry desulfurization system suitable for low-sulfur flue gas |
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