CN104474895B - The device and method of the fixing bed on-line regeneration low-temperature denitration catalyst of swinging - Google Patents
The device and method of the fixing bed on-line regeneration low-temperature denitration catalyst of swinging Download PDFInfo
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Abstract
The invention discloses the device of the fixing bed on-line regeneration low-temperature denitration catalyst of a kind of swinging, including fixed bed reactors, upper end cover, bottom end cover, four air inlet pipe, four exhaustors, drive axle, the first sealing member, bracing frame, motor, shaft coupling, frame and the second sealing member；Fixed bed reactors inner space is separated into four independent reaction zones by four pieces of dividing plates；Four reaction areas is followed successively by elimination district, First Transition district, renewing zone and the second transition region；Four air inlet pipe are arranged on bottom end cover, and four exhaustors are arranged on upper end cover, and each reaction zone is corresponding with an air inlet pipe and an exhaustor respectively.This device is capable of on-line continuous regeneration low-temperature denitration catalyst, additionally provides the method utilizing this device to carry out on-line regeneration simultaneously, solves in current Thermal Power Generation Industry coal-fired flue gas denitration process, it is difficult to the problem realizing on-line regeneration low-temperature denitration catalyst.
Description
Technical field
The present invention relates to the preparation field of low-temperature denitration catalyst, it particularly relates to the device and method of the fixing bed on-line regeneration low-temperature denitration catalyst of a kind of swinging.
Background technology
China is coal consumption state maximum in the world, and coal consumption amount accounts for about the 76% of primary energy consumption figure.The coal-fired process using coal resource with other can produce the harmful substances such as substantial amounts of flue dust, sulfur dioxide, nitrogen oxides.Wherein nitrogen oxides is one of main harmful substance of atmosphere pollution.Its kind includes: N2O5、N2O4、N2O3、N2O2、N2O、NO、NO2, general name NOx.The whole world enters the NOx about 0.5 hundred million tons of air every year, wherein about 60% derives from coal-fired flue-gas.Mainly NO and the NO that coal combustion produces2, NO accounts for about 95%.The Thermal Power Enterprises of China accounts for sizable proportion in power industry, and China's electric power, heating power production and supply industry are discharged NOx amount every year and accounted for the 66.7% of the whole nation according to statistics, and wherein Thermal Power Generation Industry discharge capacity accounts for the 38% of whole nation total amount.Therefore, country and local relevant department pay much attention to the emission control of Thermal Power Generation Industry NOx, list its emphasis in the binding indicator that " 12 " plan.
Selective catalytic reduction (SelectiveCatalyticReduction, SCR) is to control that NOx emission is the most ripe, most efficient method at present.The method is under uniform temperature and catalyst action, ammonia is utilized to do the method that NOx is optionally reduced to nitrogen and water by reducing agent, NOx removal rate can be made to reach more than 90%, the method has denitration efficiency height, the plurality of advantages such as course of reaction no coupling product, device are simple, reliable, easy to maintenance, obtain domestic and international extensive use.Wherein, catalyst is the core of SCR system, and its expense is the highest accounts for the 60% of initial stage gross investment, and performance quality directly affects overall denitration effect.Exploitation low temperature catalyst can make reaction (about 100 260 DEG C) at a lower temperature carry out, it is possible to reduces energy consumption of reaction, reduce cost, after making SCR system can be arranged in the relatively low desulfurization of flue-gas temperature, dust arrester, to reduce SO simultaneously2With the dust murder by poisoning problem to catalyst.The temperature range of the low temperature in low-temperature denitration catalyst is at 100 260 DEG C.
In industrial practice, along with SCR denitration uses the growth of time, the activity of catalyst will can not meet SCR denitration requirement gradually, until catalysqt deactivation needs to change.For economy and the consideration reducing dead catalyst secondary pollution, the method generally adopting catalyst regeneration.Due to the existence of ammonia in flue gas and sulfur, catalyst surface easily generates ammonium salt and sulphate particle, causes the blocking of micropore in catalyst, makes catalysqt deactivation.Therefore, with the anti-oxidation of inert protective gas atmosphere, raise catalyst temperature with given pace, utilize reducibility gas and catalyst surface sulfate, ammonium salt to react in hot environment, it may be achieved the desulfurization regeneration process of catalyst.Conventional catalyst regeneration needs denitrating catalyst is removed flue, realizes regeneration in optional equipment.This needs fluidisation segregation apparatus, had both wasted energy, and had added again the complexity of system.If a kind of catalyst on-line continuous denitration regenerating unit of invention, it is possible to use fume afterheat, save catalyst regeneration heat dissipation, it is achieved run continuously, there is very strong realistic meaning.
Summary of the invention
Technical problem:The technical problem to be solved is: provide the device of the fixing bed on-line regeneration low-temperature denitration catalyst of a kind of swinging, this device is capable of on-line continuous regeneration low-temperature denitration catalyst, additionally provide the method utilizing this device to carry out on-line regeneration simultaneously, solve in current Thermal Power Generation Industry coal-fired flue gas denitration process, low-temperature denitration catalyst easily inactivates, it is difficult to the problem realizing on-line regeneration.
Technical scheme:For solving above-mentioned technical problem, the technical solution used in the present invention is:
The device of the fixing bed on-line regeneration low-temperature denitration catalyst of a kind of swinging, this device includes fixed bed reactors, upper end cover, bottom end cover, four air inlet pipe, four exhaustors, drives axle, the first sealing member, bracing frame, motor, shaft coupling, frame and the second sealing member；Described fixed bed reactors are cylinder, are provided with bed layer in the middle part of fixed bed reactors；Upper end cover is connected to the top of fixed bed reactors, contact surface between upper end cover bottom surface extension and fixed bed reactors end face extension is provided with sliding rail, upper sliding rail is provided with ball, first sealing member is fixedly connected on upper end cover, and covering the junction between upper end cover and fixed bed reactors, the outer side surface of upper end cover is fixing with bracing frame to be connected；Bottom end cover is connected to the bottom of fixed bed reactors, contact surface between end face extension and the fixed bed reactors bottom surface extension of bottom end cover is provided with lower slider track, lower slider track is provided with ball, second sealing member is fixedly connected on bottom end cover, and covering the junction between bottom end cover and fixed bed reactors, the bottom of bottom end cover is fixing with frame to be connected；Drive axle to be arranged in fixed bed reactors, arrange along fixed bed reactors central axis, drive axle through bed layer, and fixing with bed layer be connected；Drive the top of axle through upper end cover, drive the bottom of axle through bottom end cover, drive the bottom of axle to be connected with motor by shaft coupling；Bed layer is filled full surface and scribbles the carrier of low-temperature denitration catalyst, carrier vertical array；Being provided with four pieces of dividing plates in fixed bed reactors, every piece of dividing plate is fixedly connected on the inwall of fixed bed reactors and drives between axle, and every piece of dividing plate upper end contacts with upper end cover inside bottom, and every piece of dividing plate lower end contacts with bottom end cover inside top；Fixed bed reactors inner space is separated into four independent reaction zones by four pieces of dividing plates；Four reaction areas is followed successively by elimination district, First Transition district, renewing zone and the second transition region along fixed bed reactors circumference；Four air inlet pipe are arranged on bottom end cover, and four exhaustors are arranged on upper end cover, and each reaction zone is corresponding with an air inlet pipe and an exhaustor respectively.
Further, the diameter of described upper end cover and the diameter of bottom end cover are equal with the external diameter of fixed bed reactors respectively, and the internal diameter of bed layer external diameter and fixed bed reactors is equal.
Further, described upper sliding rail is uniformly distributed 4 10 balls, lower slider track is uniformly distributed 4 10 balls.
Further, described carrier is made up of pottery, cylindrical, and low-temperature denitration catalyst is the mixture of Cu oxide, Mn oxide and barium oxide.
Further, described air inlet pipe and exhaustor arrange valve and flow controller respectively simultaneously.
Further, the first described sealing member and the second sealing member are reciprocating dynamic seal or rotary dynamic seal.
A kind of method utilizing above-mentioned device to carry out low-temperature denitration catalyst on-line regeneration, the method comprises the following steps:
The first step: denitrating flue gas is purified: open motor, driving axle rotates, axle is driven to drive bed layer and fixed bed reactors to rotate, upper end cover and bottom end cover maintain static, flue gas and ammonia are entered in the elimination district of fixed bed reactors by first air inlet pipe, under the low-temperature denitration catalyst effect being coated in carrier surface, flue gas and ammonia generation denitration reaction, after flue gas is cleaned, enter in ambient atmosphere through the exhaustor corresponding with first air inlet pipe；
Second step: purge residual gas in catalyst: being rotated further fixed bed reactors, the low-temperature denitration catalyst having carried out denitrification process in the first step proceeds to First Transition district with carrier；Nitrogen is entered in First Transition district by second air inlet pipe, purges residual gas in carrier, and by the exhaustor corresponding with second air inlet pipe, residual gas is discharged fixed bed reactors；
3rd step: regeneration low-temperature denitration catalyst: be rotated further fixed bed reactors, the catalyst purged through second step proceeds in renewing zone with carrier, by regeneration gas ammonia and inert protective gas N2Enter in renewing zone by the 3rd air inlet pipe, make catalyst generation regenerative response, and by gas after regeneration being discharged fixed bed reactors with the 3rd exhaustor that air inlet pipe is corresponding；
4th step: purge residual regeneration gas in catalyst: be rotated further fixed bed reactors, regenerates complete low-temperature denitration catalyst through the 3rd step and proceeds to the second transition region with carrier；Nitrogen is entered in the second transition region by the 4th air inlet pipe, purges residual regeneration gas in carrier, and by residual regeneration gas being discharged fixed bed reactors with the 4th exhaustor that air inlet pipe is corresponding；
5th step: return the first step, circular regeneration low-temperature denitration catalyst, until stopping regeneration.
Further, in the described first step, in elimination district, the temperature of denitration reaction is 100 ~ 260 DEG C, and operating pressure is an atmospheric pressure, and the heat of denitration reaction is provided by flue gas.
Further, in the 3rd described step, in renewing zone, the temperature of catalyst regeneration reaction is 380 ~ 410 DEG C, and operating pressure is an atmospheric pressure, and the heat of regenerative response is provided with inert protective gas by regeneration gas.
Beneficial effect:Compared with prior art, the method have the advantages that
1. after assembly of the invention is arranged on cleaner unit and flue gas desulfurization device, denitrating catalyst operation temperature is low, be absent from blocking and the etching problem of flying dust, the pollution of catalyst and poisoning problem also more traditional SCR system be arranged in air preheater before arrangement alleviate a lot.Low-temperature denitration catalyst select pottery be carrier, ceramic monolith surface be coated with copper, manganese, vanadium oxide as compound adsorbent.Above-mentioned catalyst and carrier have higher denitration efficiency at the temperature window of 100 ~ 260 DEG C.
2., in the present invention, denitration purges the circulation of regeneration purge and can continuously run, and ensures good air-tightness simultaneously.Both remaining NH in denitrification process had been prevented3, flue gas interference denitrating catalyst regenerative process, after being also prevented from regenerative process, residual gas interference catalyst denitrification process.Regenerative process adopts thermal reduction regeneration means, both ensure that the decomposition of ammonium salt, and had also promoted the reduction of sulfate, and had made low-temperature denitration catalyst have higher regeneration capacity.
3. assembly of the invention adopts the fixing bed on-line regeneration low-temperature denitration catalyst of swinging, compared with general denitrating catalyst regenerating unit, it is not necessary to carry out catalyst transmission, eliminates fluidisation and carries the energy and fluidisation thereof and segregation apparatus that consume.Device can realize continuous operation, it is achieved the on-line continuous denitration regeneration of denitrating catalyst, reduces material and energy expenditure, it is to avoid complex system, it is achieved that green, circulation technology.
Accompanying drawing explanation
Fig. 1 is the structural representation of assembly of the invention.
Fig. 2 is A-A sectional view in Fig. 1.
Fig. 3 is B-B sectional view in Fig. 1.
Fig. 4 is C-C sectional view in Fig. 1.
Figure has: fixed bed reactors 1, upper end cover 2, bottom end cover 4, four exhaustors 5 of 3, four air inlet pipe, dividing plate 6, driving axle the 7, first sealing member 8, bracing frame 9, motor 10, shaft coupling 11, elimination district 12, First Transition district 13, renewing zone the 14, second transition region 15, upper sliding rail 16, lower slider track 17, frame 18, ball 19, bed floor 20, carrier the 21, second sealing member 22.
Detailed description of the invention
The present invention will be further described below with reference to accompanying drawings.
As shown in Figures 1 to 4, the device of the fixing bed on-line regeneration low-temperature denitration catalyst of a kind of swinging of the present invention, including fixed bed reactors 1, upper end cover 2, bottom end cover 4, four exhaustors 5 of 3, four air inlet pipe, drives axle the 7, first sealing member 8, bracing frame 9, motor 10, shaft coupling 11, frame 18 and the second sealing member 22.Fixed bed reactors 1, in cylinder, are provided with bed layer 20 in the middle part of fixed bed reactors 1.Upper end cover 2 is connected to the top of fixed bed reactors 1.Contact surface between upper end cover 2 bottom surface extension and fixed bed reactors 1 end face extension is provided with sliding rail 16.Upper sliding rail 16 is provided with ball 19.First sealing member 8 is fixedly connected on upper end cover 2, and covers the junction between upper end cover 2 and fixed bed reactors 1.The outer side surface of upper end cover 2 is fixing with bracing frame 9 to be connected.Bottom end cover 3 is connected to the bottom of fixed bed reactors 1, and the contact surface between end face extension and the fixed bed reactors 1 bottom surface extension of bottom end cover 3 is provided with lower slider track 17.Lower slider track 17 is provided with ball 19.Second sealing member 22 is fixedly connected on bottom end cover 3, and covers the junction between bottom end cover 3 and fixed bed reactors 1.The bottom of bottom end cover 3 is fixing with frame 18 to be connected.Drive axle 7 to be arranged in fixed bed reactors 1, arrange along fixed bed reactors 1 central axis, drive axle 7 through bed layer 20, and fixing with bed layer 20 be connected.Drive the top of axle 7 through upper end cover 2, drive the bottom of axle 7 through bottom end cover 3, drive the bottom of axle 7 to be connected with motor 10 by shaft coupling 11.Bed layer 20 is filled full surface and scribbles the carrier 21 of low-temperature denitration catalyst, carrier 21 vertical array.Four pieces of dividing plates 6 it are provided with in fixed bed reactors 1.Every piece of dividing plate 6 is fixedly connected on the inwall of fixed bed reactors 1 and drives between axle 7, and every piece of dividing plate 6 upper end contacts with upper end cover 2 inside bottom, and every piece of dividing plate 6 lower end contacts with bottom end cover 3 inside top.Fixed bed reactors 1 inner space is separated into four independent reaction zones by four pieces of dividing plates 6.Four reaction areas is followed successively by elimination district 12, First Transition district 13, renewing zone 14 and the second transition region 15 along fixed bed reactors 1 circumference.Four air inlet pipe 4 are arranged on bottom end cover 3, and four exhaustors 5 are arranged on upper end cover 2, and each reaction zone is corresponding with an air inlet pipe 4 and an exhaustor 5 respectively.
Further, the diameter of described upper end cover 2 and the diameter of bottom end cover 3 are equal with the external diameter of fixed bed reactors 1 respectively, and the internal diameter of bed layer 20 external diameter and fixed bed reactors 1 is equal.So it is provided with and is beneficial to upper end cover 2, bottom end cover 3 and the bed layer 20 installation on fixed bed reactors 1.Utilize bracing frame 9 to fix upper end cover 2, utilize frame 18 to fix bottom end cover 3, it is ensured that in the work rotation process of fixed bed reactors 1, the state that upper end cover 2 and bottom end cover 3 remain stable for.
Further, described upper sliding rail 16 is uniformly distributed 4 10 balls 19, lower slider track 17 is uniformly distributed 4 10 balls 19.In assembly of the invention work process, fixed bed reactors 1 and bed layer 20 will with driving axle 7 to rotate.Therefore, arranging sliding rail 16 and lower slider track 17 guarantees when fixed bed reactors 1 rotate, upper end cover 2 and bottom end cover 3 can be stablized motionless.Appropriate number of ball 19 is set, is conducive to uniformity and stability that fixed bed reactors 1 rotate.
Further, described carrier 21 is made up of pottery, cylindrical, and low-temperature denitration catalyst is the mixture of Cu oxide, Mn oxide and barium oxide.This material has good low temperature active and high-specific surface area, sulfur resistive, anti humility performance.Metal composite oxide with low cost, the selective adsorption capacity of nitrogen is strong.Carrier 21 is cylindrical, effectively increases adsorption surface area, and reduces the abrasion of catalyst.
Further, described air inlet pipe 4 and exhaustor 5 arrange valve and flow controller respectively simultaneously.Valve and flow controller are set with adjusting gas flow.
Further, the first described sealing member 8 and the second sealing member 22 are reciprocating dynamic seal or rotary dynamic seal.In the present invention, fixed bed reactors 1 are connected between upper end cover 2 and bottom end cover 3, in order to ensure the gas in fixed bed reactors 1 not from the space seepage between fixed bed reactors 1 and upper end cover 2 and bottom end cover 3, it is necessary to arrange sealing member between fixed bed reactors 1 and upper end cover 2 and bottom end cover 3.Due to fixed bed reactors 1 in the course of the work, it is in rotary state, so sealing member being set to reciprocating dynamic seal or rotary dynamic seal.
Above-mentioned device carries out the method for low-temperature denitration catalyst on-line regeneration, comprises the following steps:
The first step: denitrating flue gas is purified: open motor 10, axle 7 is driven to rotate, axle 7 is driven to drive bed layer 20 and fixed bed reactors 1 to rotate, upper end cover 2 and bottom end cover 3 maintain static, flue gas and ammonia are entered in the elimination district 12 of fixed bed reactors 1 by first air inlet pipe 4, under the low-temperature denitration catalyst effect being coated in carrier 21 surface, flue gas and ammonia generation denitration reaction, after flue gas is cleaned, enter in ambient atmosphere through the exhaustor 5 corresponding with first air inlet pipe 4.
In the first step, in elimination district 12, the temperature of denitration reaction is 100 ~ 260 DEG C, and operating pressure is an atmospheric pressure, and the heat of denitration reaction is provided by flue gas.
Second step: purge residual gas in catalyst: being rotated further fixed bed reactors 1, the low-temperature denitration catalyst having carried out denitrification process in the first step proceeds to First Transition district 13 with carrier 21；Nitrogen is entered in First Transition district 13 by second air inlet pipe 4, purges residual gas in carrier 21, and by the exhaustor 5 corresponding with second air inlet pipe 4, residual gas discharged fixed bed reactors 1.
By the operation of second step, remaining flue gas and remaining NH can be avoided3Interference to catalyst regeneration process.
3rd step: regeneration low-temperature denitration catalyst: be rotated further fixed bed reactors 1, the catalyst purged through second step proceeds in renewing zone 14 with carrier 21, by regeneration gas ammonia and inert protective gas N2Entered in renewing zone 14 by the 3rd air inlet pipe 4, make catalyst generation regenerative response, and by the gas after regeneration being discharged fixed bed reactors 1 with the 3rd exhaustor that air inlet pipe 4 is corresponding 5.
In the third step, in renewing zone 14, the temperature of catalyst regeneration reaction is 380 ~ 410 DEG C, and operating pressure is an atmospheric pressure, and the heat of regenerative response is provided with inert protective gas by regeneration gas.
4th step: purge residual regeneration gas in catalyst: be rotated further fixed bed reactors 1, regenerates complete low-temperature denitration catalyst through the 3rd step and proceeds to the second transition region 15 with carrier 21；Nitrogen is entered in the second transition region 15 by the 4th air inlet pipe 4, purges residual regeneration gas in carrier 21, and by with the 4th exhaustor that air inlet pipe 4 is corresponding 5 residual regeneration gas being discharged fixed bed reactors 1.
By the operation of the 4th step, the residual regeneration gas interference to catalyst denitrification process can be avoided.
5th step: return the first step, circular regeneration low-temperature denitration catalyst, until stopping regeneration.
The present invention adopts swinging fixed bed reactors on-line regeneration low-temperature denitration catalyst; compared with general denitrating catalyst regenerating unit; eliminate shutdown start process, it is not necessary to carry out catalyst off-line transmission, eliminate fluidisation and carry the energy and fluidisation thereof and segregation apparatus that consume.The circulation of system denitration-purging-regeneration-purging can continuously run, and ensures good air-tightness simultaneously.Both remaining NH in denitrification process had been prevented3, flue gas interference denitrating catalyst regenerative process, be also prevented from residual gas interference catalyst denitrification process after regenerative process.The present invention realizes the on-line continuous denitration regeneration of denitrating catalyst.Meanwhile, the present invention utilizes fume afterheat heatable catalyst, it is provided that heat dissipation needed for catalyst regeneration, has saved the energy, reduces material and energy expenditure, it is to avoid complex system, it is achieved that green, circulation technology.
The foregoing is only the better embodiment of the present invention; protection scope of the present invention is not limited with above-mentioned embodiment; in every case those of ordinary skill in the art modify or change according to the equivalence that disclosed content is made, and all should include in the protection domain recorded in claims.
Claims (9)
1. the device of the fixing bed on-line regeneration low-temperature denitration catalyst of swinging, it is characterized in that, this device includes fixed bed reactors (1), upper end cover (2), bottom end cover (3), four air inlet pipe (4), four exhaustors (5), drives axle (7), the first sealing member (8), bracing frame (9), motor (10), shaft coupling (11), frame (18) and the second sealing member (22)；
Described fixed bed reactors (1) are in cylinder, and fixed bed reactors (1) middle part is provided with bed layer (20)；Upper end cover (2) is connected to the top of fixed bed reactors (1), contact surface between upper end cover (2) bottom surface extension and fixed bed reactors (1) end face extension is provided with sliding rail (16), upper sliding rail (16) is provided with ball (19), first sealing member (8) is fixedly connected on upper end cover (2), and covering the junction between upper end cover (2) and fixed bed reactors (1), the outer side surface of upper end cover (2) is fixing with bracing frame (9) to be connected；Bottom end cover (3) is connected to the bottom of fixed bed reactors (1), contact surface between end face extension and fixed bed reactors (1) the bottom surface extension of bottom end cover (3) is provided with lower slider track (17), lower slider track (17) is provided with ball (19), second sealing member (22) is fixedly connected on bottom end cover (3), and covering the junction between bottom end cover (3) and fixed bed reactors (1), the bottom of bottom end cover (3) is fixing with frame (18) to be connected；
Drive axle (7) to be arranged in fixed bed reactors (1), arrange along fixed bed reactors (1) central axis, drive axle (7) through bed layer (20), and fixing with bed layer (20) be connected；Drive the top of axle (7) through upper end cover (2), drive the bottom of axle (7) through bottom end cover (3), drive the bottom of axle (7) to be connected with motor (10) by shaft coupling (11)；Bed layer (20) is filled full surface and scribbles the carrier (21) of low-temperature denitration catalyst, carrier (21) vertical array；
Four pieces of dividing plates (6) it are provided with in fixed bed reactors (1), every piece of dividing plate (6) is fixedly connected on the inwall of fixed bed reactors (1) and drives between axle (7), and every piece of dividing plate (6) upper end contacts with upper end cover (2) inside bottom, every piece of dividing plate (6) lower end contacts with bottom end cover (3) inside top；Fixed bed reactors (1) inner space is separated into four independent reaction zones by four pieces of dividing plates (6)；Four reaction areas is followed successively by elimination district (12), First Transition district (13), renewing zone (14) and the second transition region (15) along fixed bed reactors (1) circumference；
Four air inlet pipe (4) are arranged on bottom end cover (3), and four exhaustors (5) are arranged on upper end cover (2), and each reaction zone is corresponding with an air inlet pipe (4) and an exhaustor (5) respectively.
2. the device of the fixing bed on-line regeneration low-temperature denitration catalyst of swinging described in claim 1, it is characterized in that, the diameter of described upper end cover (2) and the diameter of bottom end cover (3) are equal with the external diameter of fixed bed reactors (1) respectively, and the internal diameter of bed layer (20) external diameter and fixed bed reactors (1) is equal.
3. the device of the fixing bed on-line regeneration low-temperature denitration catalyst of swinging described in claim 1, it is characterized in that, described upper sliding rail (16) is uniformly distributed 4 10 balls (19), lower slider track (17) is uniformly distributed 4 10 balls (19).
4. the device of the fixing bed on-line regeneration low-temperature denitration catalyst of swinging described in claim 1, it is characterised in that described carrier (21) is made up of pottery, cylindrical, and low-temperature denitration catalyst is the mixture of Cu oxide, Mn oxide and barium oxide.
5. the device of the fixing bed on-line regeneration low-temperature denitration catalyst of swinging according to claim 1, it is characterised in that in described air inlet pipe (4) and exhaustor (5), valve and flow controller are set respectively simultaneously.
6. the device of the fixing bed on-line regeneration low-temperature denitration catalyst of swinging according to claim 1,
It is characterized in that, described the first sealing member (8) and the second sealing member (22) are reciprocating dynamic seal or rotary dynamic seal.
7. the method that the device utilized described in claim 1 carries out low-temperature denitration catalyst on-line regeneration, it is characterised in that the method comprises the following steps:
The first step: denitrating flue gas is purified: open motor (10), axle (7) is driven to rotate, axle (7) is driven to drive bed layer (20) and fixed bed reactors (1) to rotate, upper end cover (2) and bottom end cover (3) maintain static, flue gas and ammonia are entered in the elimination district (12) of fixed bed reactors (1) by first air inlet pipe (4), under the low-temperature denitration catalyst effect being coated in carrier (21) surface, flue gas and ammonia generation denitration reaction, after flue gas is cleaned, enter in ambient atmosphere through the exhaustor (5) corresponding with first air inlet pipe (4)；
Second step: purge residual gas in catalyst: being rotated further fixed bed reactors (1), the low-temperature denitration catalyst having carried out denitrification process in the first step proceeds to First Transition district (13) with carrier (21)；Nitrogen is entered in First Transition district (13) by second air inlet pipe (4), purges residual gas in carrier (21), and by the exhaustor (5) corresponding with second air inlet pipe (4), residual gas discharged fixed bed reactors (1)；
3rd step: regeneration low-temperature denitration catalyst: be rotated further fixed bed reactors (1), the catalyst purged through second step proceeds in renewing zone (14) with carrier (21), by regeneration gas ammonia and inert protective gas N2Entered in renewing zone (14) by the 3rd air inlet pipe (4), make catalyst generation regenerative response, and by the exhaustor (5) corresponding with the 3rd air inlet pipe (4), the gas after regeneration is discharged fixed bed reactors (1)；
4th step: purge residual regeneration gas in catalyst: be rotated further fixed bed reactors (1), regenerates complete low-temperature denitration catalyst through the 3rd step and proceeds to the second transition region (15) with carrier (21)；Nitrogen is entered in the second transition region (15) by the 4th air inlet pipe (4), purges residual regeneration gas in carrier (21), and by the exhaustor (5) corresponding with the 4th air inlet pipe (4), residual regeneration gas discharged fixed bed reactors (1)；
5th step: return the first step, circular regeneration low-temperature denitration catalyst, until stopping regeneration.
8. the method carrying out low-temperature denitration catalyst on-line regeneration described in claim 7, it is characterized in that, in the described first step, in elimination district (12), the temperature of denitration reaction is 100 ~ 260 DEG C, operating pressure is an atmospheric pressure, and the heat of denitration reaction is provided by flue gas.
9. the method carrying out low-temperature denitration catalyst on-line regeneration described in claim 7 or 8; it is characterized in that; in the 3rd described step; in renewing zone (14), the temperature of catalyst regeneration reaction is 380 ~ 410 DEG C; operating pressure is an atmospheric pressure, and the heat of regenerative response is provided with inert protective gas by regeneration gas.
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| US5139757A (en) * | 1990-08-01 | 1992-08-18 | Haldor Topsoe A/S | Process for the removal of nitrogen oxides from flue gases |
| CN202719764U (en) * | 2012-07-30 | 2013-02-06 | 北京科技大学 | Rotary fixed bed chemical looping combustion reaction device |
| CN103994462A (en) * | 2014-06-05 | 2014-08-20 | 山东大学 | Air preheating and denitration integrated reactor and reaction method |
| CN104096478A (en) * | 2014-07-22 | 2014-10-15 | 山东大学 | Self-contained green denitration system and technology for iron and steel enterprises |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5139757A (en) * | 1990-08-01 | 1992-08-18 | Haldor Topsoe A/S | Process for the removal of nitrogen oxides from flue gases |
| CN202719764U (en) * | 2012-07-30 | 2013-02-06 | 北京科技大学 | Rotary fixed bed chemical looping combustion reaction device |
| CN103994462A (en) * | 2014-06-05 | 2014-08-20 | 山东大学 | Air preheating and denitration integrated reactor and reaction method |
| CN104096478A (en) * | 2014-07-22 | 2014-10-15 | 山东大学 | Self-contained green denitration system and technology for iron and steel enterprises |
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