CN104888869A - Waste flue gas denitration catalyst regeneration method and equipment - Google Patents
Waste flue gas denitration catalyst regeneration method and equipment Download PDFInfo
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- CN104888869A CN104888869A CN201510321840.2A CN201510321840A CN104888869A CN 104888869 A CN104888869 A CN 104888869A CN 201510321840 A CN201510321840 A CN 201510321840A CN 104888869 A CN104888869 A CN 104888869A
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Abstract
The invention discloses a waste flue gas denitration catalyst regeneration method, and belongs to the field of air pollution control. The method comprises the following steps: (1) removing dust through vacuum adsorption; (2) spray-cleaning and cleaning using a high-pressure spray gun; (3) washing with deionized water after ultrasonic cleaning; (4) draining off after acid pickling; (5) soaking with an activation solution, wherein the activation solution is an aqueous solution of a precursor of V2O5-WO3 or V2O5-MoO3, the weight percentage of metal oxides in the V2O5-WO3 activation solution is as follows: 0.8-5.0% of V2O5, 0.3-1.0% WO3 and the balance of water, the weight percentage of metal oxides in the V2O5-MoO3 activation solution is as follows: 0.8-5.0% of V2O5, 0.15-1.0% of MoO3 and the balance of water; (6) drying and calcining. The invention also discloses waste flue gas denitration catalyst regeneration equipment which includes a tracked conveying device, a spray cleaning device, an ultrasonic cleaning tank, a deionized water cleaning device, a pickling tank, a drain basket, an activation tank, a rail transport device, a tunnel kiln and a tunnel calciner, which are sequentially arranged.
Description
Technical field
The invention belongs to Air Pollution Control field, be specifically related to a kind of waste flue gas denitration catalyst renovation process and equipment.
Background technology
Nitrogen oxide is one of main atmosphere pollution, and nitrogen oxide can form acid rain, photochemical fog etc., and present nationwide haze weather and nitrogen oxide have very large relation.Thermal power plant coal-fired flue-gas discharge be the main source of artificial nitrogen oxide.According to " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) of up-to-date promulgation to NO
xconcentration of emission has formulated control criterion (100mg/m the strictest in world wide especially
3).
For controlling the discharge of nitrogen oxide, SCR(Selective Catalytic Reduction) denitrating catalyst, namely waste flue gas denitration catalyst is applied in the transformation of old thermal power plant and new Thermal Power Plant Construction widely, to reduce the discharge capacity of nitrogen oxide.SCR denitration has efficiently, reliable denitration performance, but only has 2 ~ 3 years the service life of SCR denitration.In use for some time, the reduced activity of SCR denitration or inactivation, even damaged.Cause SCR denitration inactivation reason mainly comprise the following aspects: (1) SCR denitration is in the working environment of high temperature for a long time, and the alkali metal (as potassium, sodium, calcium etc.) contained in ash content, arsenic, phosphorus etc. very easily cause catalyst that sintering and the poisoning and inactivation of alkaline-earth metal occur; (2) SO in outer flue gas
2, SO
3sour gas is known from experience and NH
3react and generate ammonium sulfate compound (as ammonium sulfate, Ammonium hydrogen sulfate etc.), this type of ammonium sulfate compound can be adsorbed on the surface of catalyst, the active sites of catalyst surface is covered, and hinders the carrying out of catalytic reaction; (3) the flying dust granule contained in mechanical wear and discharged gas fume is accumulated for a long time at catalyst surface, defines barrier layer, hinders NH
3arrive the activity site of catalysis.
SCR denitration is the core place of SCR denitration system, and owing to urging the expensive of catalyst, in the SCR denitration engineering initial stage drops into, catalyst cost accounts for 20 ~ 40% of out of stock engineering totle drilling cost.Along with the Large scale construction of coal-burning power plant's SCR denitration engineering, the use amount of SCR catalyst increases suddenly, the regeneration process of waste flue gas denitration catalyst can save the replacement cost of SCR denitration, avoid the mishandling secondary pollution caused of waste catalyst simultaneously, there is good ecnomics and enviroment benefit.
Existing SCR denitration renovation process is situ regeneration, and only carry out deashing process for catalyst duct and surface, be difficult to accomplish deep clean, the active response rate of the catalyst of situ regeneration is low, and after regeneration, service life is short.Meanwhile, situ regeneration catalyst process in, cleaning fluid is easily revealed or is spilt, and easily causes environmental pollution.
Therefore develop a kind of easy to operate, cost is low, cleaning and regeneration is effective, be applicable to industrialization large-scale production and application SCR denitration renovation process and provide corresponding equipment significant.
Summary of the invention
The object of the present invention is to provide a kind of waste flue gas denitration catalyst renovation process, provide corresponding waste flue gas denitration catalyst reclaim equiment to be then another object of the present invention.
Based on above-mentioned purpose, the present invention adopts following technical scheme: a kind of waste flue gas denitration catalyst renovation process, comprises the following steps:
(1) negative-pressure adsorption dedusting is adopted to carry out deashing process to waste flue gas denitration catalyst module;
(2) cleaning showers, high-pressure spray gun cleaning: first carry out cleaning showers 5 ~ 60min to catalyst module, spray pressure 0.5 ~ 1.3Mpa, then with high-pressure spray gun cleaning 5 ~ 60min; The percentage by weight of spray and spray gun cleaning fluid consists of: surfactant 0.1 ~ 3.0%, penetrating agent JFC 0.1 ~ 3.0%, surplus are water;
(3) deionized water rinsing after ultrasonic cleaning: catalyst module is placed in ultrasonic cleaning liquid ultrasonic vibration process 5 ~ 60min, the percentage by weight of ultrasonic cleaning liquid consists of; Surfactant 0.3 ~ 3.0%, penetrating agent JFC 0.3 ~ 3.0%, surplus is water; Then deionized water rinsing 5 ~ 60min is used;
(4) pickling: pickling 10 ~ 180min at 50 ~ 70 DEG C, drains;
(5) activating solution soaks: at 60 ~ 70 DEG C, use activating solution to soak 0.5 ~ 6h; Described activating solution is V
2o
5-WO
3or V
2o
5-MoO
3the aqueous solution of presoma, V
2o
5-WO
3activating solution consists of with its percentage by weight of metal oxide: V
2o
50.8 ~ 5.0%, WO
30.3 ~ 1.0%, surplus is water, V
2o
5-MoO
3activating solution consists of with its percentage by weight of metal oxide: V
2o
50.8 ~ 5.0%, MoO
30.15 ~ 1.0%, surplus is water;
(6) dry, calcining: first dry 1 ~ 12h at 70 ~ 120 DEG C, then in 300 ~ 700 DEG C of calcining 1 ~ 12h.
Further, in the ultrasonic cleaning process of step (3), carry out intermittent aeration process to catalyst module, aeration pressure is 0.2 ~ 0.8Mpa.Under hyperacoustic oscillation action, the material on catalyst module surface is forced to depart from, and the material departing from catalyst module surface can be taken away catalyst surface by aeration, improves cleaning effect.
Further, in step (2) and (3), described surfactant is OP-10 or dodecyl sodium sulfate.
Further, in step (4), carry out aeration while pickling, aeration pressure is 0.2 ~ 0.8Mpa.The material that aeration can make pickling get off hightails catalyst, improves cleaning effect.
Further, in step (5), V
2o
5presoma be selected from one in vanadyl oxalate, ammonium vanadate and ammonium metavanadate; WO
3presoma be ammonium metatungstate or ammonium paratungstate; MoO
3presoma be selected from one in ammonium paramolybdate, ammonium dimolybdate, ammonium tetramolybdate and ammonium heptamolybdate.
Further, in step (5), before using activating solution to soak catalyst module, first activating solution is stirred 1 ~ 10h at 70 ~ 110 DEG C, the activation effect to catalyst of activating solution can be improved.
A kind of waste flue gas denitration catalyst reclaim equiment, comprise set gradually track conveying device, spraying and cleaning apparatus, ultrasonic cleaning pond, washed with de-ionized water device, pickling tube, draining basket, activating tank, track conveying device, tunnel type drying oven and tunnel type calcining furnace; Moving vacuum cleaner is provided with above the leading portion of track conveying device, the back segment of track conveying device is through spraying and cleaning apparatus, described spraying and cleaning apparatus comprises to be located at spray thrower above track conveying device and giant, to be located at cleaning fluid collecting pit below track conveying device, the vertical screen pack be positioned at below spray thrower front end is provided with in cleaning fluid collecting pit, cleaning fluid collecting pit is divided into former and later two ponds by screen pack, be provided with circulating pump in the pond of front end, giant is connected with circulating pump respectively with spray thrower; Pickle collecting pit is provided with below draining basket; Be provided with hanging apparatus between track conveying device end and track conveying device front end, track conveying device passes through tunnel formula drying oven and tunnel type calcining furnace.
Further, spraying and cleaning apparatus, ultrasonic cleaning pond, pickling tube and activating tank are connected to waste liquid circulation treating apparatus.
Further, bottom described ultrasonic cleaning pond, pickling tube and activating tank, be respectively equipped with aeration tube, the effect of ultrasonic cleaning, pickling and activation can be improved.
Further, described equipment also comprises activating solution reactor, and the discharging opening of activating solution reactor is communicated with activating tank.
Further, track conveying device, spraying and cleaning apparatus, ultrasonic cleaning pond, pickling tube, draining basket, activating tank, track conveying device, tunnel type drying oven and tunnel type calcining furnace are equipped with control system component, to realize control of industrialization.
Compared with prior art, waste flue gas denitration catalyst renovation process provided by the invention has following beneficial effect:
(1) this catalyst recovery process carries out under mild conditions, chemical deep layer cleaning up hill and dale can be realized to the waste flue gas denitration catalyst of inactivation, toxin in thorough removing catalyst, and regenerative process can be avoided the damage of the microcellular structure of catalyst and change;
(2) by the conbined usage of cleaning fluid, ultrasonic technology and aeration process, realize thoroughly cleaning inactivation waste flue gas denitration catalyst, in regenerative process, the mechanical strength of catalyst reduces less;
(3) renovation process provided by the invention has obvious regeneration effect to the waste flue gas denitration catalyst because of dust stratification, sulfate blocking, alkali (soil) factor such as metal poisoning and arsenic poisoning and inactivation, specific surface area of catalyst after regeneration returns to initial level, catalyst activity returns to original level, even catalytic activity increases, and the waste flue gas denitration catalyst after regeneration can meet the requirement of actual operation.
Waste flue gas denitration catalyst reclaim equiment assembling provided by the invention is simple, be easy to operation, to the favorable regeneration effect of waste flue gas denitration catalyst, achieve recycling of cleaning fluid, avoid secondary pollution, decrease new water use amount, improve water resource is utilization ratio, is applicable to industrialization large-scale production and application.In addition, this device adopts ultrasonic cleaning pond, achieves the conbined usage of cleaning fluid and ultrasonic technology.
Accompanying drawing explanation
Fig. 1 is the structural representation of catalyst regeneration equipment provided by the invention;
Fig. 2 is the structural representation of spraying and cleaning apparatus in Fig. 1;
Fig. 3 is the structural representation in ultrasonic cleaning pond in Fig. 1.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in detail.
embodiment 1
A kind of waste flue gas denitration catalyst reclaim equiment, as shown in Fig. 1 ~ 3, comprise the track conveying device 14 set gradually, spraying and cleaning apparatus 3, ultrasonic cleaning pond 5, washed with de-ionized water device 6, pickling tube 7, draining basket 8, activating tank 9, track conveying device 11, tunnel type drying oven 12 and tunnel type calcining furnace 13, spraying and cleaning apparatus 3 and ultrasonic cleaning pond 5 between be also provided with to lift and adjust district 4, hanging apparatus 15 is provided with between track conveying device 14 end and track conveying device 11 front end, track conveying device 11 passes through tunnel formula drying oven 12 and tunnel type calcining furnace 13.
Moving vacuum cleaner 1 is provided with above the leading portion of track conveying device 14, the back segment of track conveying device 14 is through spraying and cleaning apparatus 3, spraying and cleaning apparatus 3 comprises is located at spray thrower 31 above track conveying device 14 and giant 32, be located at the cleaning fluid collecting pit 33 below track conveying device 14, spraying and cleaning apparatus 3 sidewall is provided with observation window 34, to observe the cleaning situation of catalyst, the length of cleaning fluid collecting pit 33 is greater than the length of station shared by spray thrower 31 and giant 32, the vertical screen pack 36 be positioned at below spray thrower 31 front end is provided with in cleaning fluid collecting pit 33, cleaning fluid collecting pit 33 is divided into former and later two ponds by screen pack 36, circulating pump 35 is provided with in the pond of front end, giant 32 is connected with circulating pump 35 respectively with spray thrower 31.
Ultrasonic cleaning pond 5 inwall and bottom are provided with oscillator bearer bar 51, are provided with oscillator in oscillator bearer bar 51, and bottom is provided with the aeration tube 52 of band solarization air cap, is provided with control zone 53 outside ultrasonic cleaning pond.
Pickling tube 7 inwall is provided with heater 72, and bottom is provided with the aeration tube 71 of band solarization air cap, pickling tube 73; Pickle collecting pit is provided with below draining basket 8;
Be provided with heater 92 in activating tank 9, bottom is provided with the aeration tube 91 of band solarization air cap, and be provided with control zone 93 outside activating tank, the discharging opening of activating solution reactor 10 is communicated with activating tank 9.
From import, heating zone, flat-temperature zone, stove cold-zone and fast cold-zone is followed successively by calcining furnace 13.
Spraying and cleaning apparatus 3, ultrasonic cleaning pond 5, pickling tube 7 and activating tank 9 are connected to waste liquid circulation treating apparatus.
Track conveying device 14, spraying and cleaning apparatus 3, ultrasonic cleaning pond 5, washed with de-ionized water device 6, pickling tube 7, draining basket 8, activating tank 9, track conveying device 11, tunnel type drying oven 12 and tunnel type calcining furnace 13 are equipped with control system component,, to realize control of industrialization.
Adopt the said equipment to carry out regeneration to honeycomb fashion waste flue gas denitration catalyst (SCR denitration) module that the 150mm × 150mm × 900mm of an inactivation, specification are 16 × 16 holes to process, comprise the following steps:
(1) catalyst module 2 is placed on track conveying device, adopts the dedusting of Moveable industrial dust exhauster 1 pair of catalyst module 2 negative-pressure adsorption, and the artificial through hole that hockets, deashing process of giving a farfetched interpretation, improve deashing dust removing effects;
(2) cleaning showers, high-pressure spray gun cleaning: the catalyst module 2 after deashing dedusting moves in spraying and cleaning apparatus 3 along track conveying device 14, first adopt spray pressure be 0.8Mpa cleaning fluid by spray thrower 31 pairs of catalyst modules 2 of spraying and cleaning apparatus 3 carry out large area cleaning 60min after, adopt high-pressure spray gun 32 more manually to a cleaning catalyst module 60min, the percentage by weight of described cleaning fluid consists of: OP-10(APES) 0.1%, JFC(AEO) 0.1%, surplus is water;
(3) deionized water rinsing after ultrasonic cleaning: the catalyst module 2 after cleaning showers is lifted to store have ultrasonic cleaning liquid ultrasonic cleaning pond 5 in ultrasonic cleaning 60min, then catalyst module 2 is lifted and use deionized water rinsing 60min to manual cleaning district 6, hyperacoustic frequency is 28KHZ, during ultrasonic vibration cleaning, intermittent aerating process, aeration pressure is 0.8Mpa, the material departing from catalyst module surface can be taken away catalyst surface by aeration, improve cleaning effect, the percentage by weight of ultrasonic cleaning liquid consists of: OP-10(APES) 0.3%, JFC (AEO) 0.3%, surplus is water,
(4) pickling: the catalyst module 2 after manual cleaning is lifted have 50 DEG C to storing, concentration is pickling 10min in the pickling tube 7 of the aqueous sulfuric acid of 3.0mol/L, and carries out Air Exposure simultaneously, aeration pressure is 0.8Mpa; Catalyst module 2 after pickling is lifted and drains without obvious fluid drips pouring outflow to draining basket 8;
(5) activating solution soaks: lifted by the catalyst module 2 after draining and soak 6h to the activating tank 9 of 60 DEG C, and carry out Air Exposure simultaneously, aeration pressure is that 0.8Mpa activating solution used re-uses after homogenizing 10h at 70 DEG C, activating solution is the mixed solution of vanadyl oxalate, ammonium metatungstate, with metal oxide, the percentage by weight of activating solution consists of: V
2o
53.0%, WO
30.8%, surplus is water;
(6) dry, calcining: the catalyst module 2 after activating solution soaks first in 70 DEG C of drying ovens 12 after dry 12h, then is delivered in 700 DEG C of calcining furnaces 13 and calcines 1h under the effect of track conveying device.
embodiment 2
Adopt the equipment identical with the embodiment 1 pair SCR denitration module identical with embodiment 1 specification to carry out regeneration to process, comprise the following steps:
(1) catalyst module 2 is placed on track conveying device, adopts the dedusting of Moveable industrial dust exhauster 1 pair of catalyst module 2 negative-pressure adsorption, and the artificial through hole that hockets, deashing process of giving a farfetched interpretation, improve deashing dust removing effects;
(2) cleaning showers, high-pressure spray gun cleaning: the catalyst module 2 after deashing dedusting is moved in spraying and cleaning apparatus 3 along track conveying device 14, first adopt spray pressure be 1.3Mpa cleaning fluid by spray thrower 31 pairs of catalyst modules 2 of spraying and cleaning apparatus 3 carry out large area cleaning 5min after, adopt high-pressure spray gun 32 more manually to a cleaning catalyst module 5min, the percentage by weight of described cleaning fluid consists of: dodecyl sodium sulfate 3.0%, JFC 3.0%, surplus are water;
(3) deionized water rinsing after ultrasonic cleaning: the catalyst module 2 after cleaning showers is lifted to store have ultrasonic cleaning liquid ultrasonic cleaning pond 5 in ultrasonic cleaning 5min, then catalyst module 2 lifts and uses deionized water rinsing 5min to manual cleaning district 6, hyperacoustic frequency is 28KHZ, during ultrasonic vibration cleaning, intermittent aerating process, the material departing from catalyst module surface can be taken away catalyst surface by aeration, improve cleaning effect, wherein, aeration pressure is 0.2Mpa, the percentage by weight of ultrasonic cleaning liquid consists of: dodecyl sodium sulfate 3.0%, JFC 3.0%, surplus is water,
(4) pickling: the catalyst module 2 after manual cleaning is lifted store have 70 DEG C, concentration is pickling 180min in the pickling tube 7 of the aqueous sulfuric acid of 0.1mol/L, and carries out Air Exposure simultaneously, aeration pressure is 0.2Mpa; Catalyst module 2 after pickling is lifted and drains without obvious fluid drips pouring outflow to draining basket 8;
(5) activating solution soaks: lifted by the catalyst module 2 after draining and soak 0.5h to the activating tank 9 of 70 DEG C, activating solution used re-uses after homogenizing 1h at 110 DEG C, activating solution is the mixed solution of ammonium vanadate, ammonium paratungstate, with metal oxide, the percentage by weight of activating solution consists of: V
2o
52.0%, WO
30.4%, surplus is water;
(6) dry, calcining: the catalyst module 2 after activating solution soaks first after dry 1h, is transported in 300 DEG C of calcining furnaces 13 and calcines 12h under the effect of track conveying device 11 in 120 DEG C of drying ovens 12.
embodiment 3
Adopt the equipment identical with the embodiment 1 pair SCR denitration module identical with embodiment 1 specification to carry out regeneration to process, comprise the following steps:
(1) catalyst module 2 is placed on track conveying device, adopts the dedusting of Moveable industrial dust exhauster 1 pair of catalyst module 2 negative-pressure adsorption, and the artificial through hole that hockets, deashing process of giving a farfetched interpretation, improve deashing dust removing effects;
(2) cleaning showers, high-pressure spray gun cleaning: the catalyst module 2 after deashing dedusting is moved in spraying and cleaning apparatus 3 along track conveying device 14, first adopt spray pressure be 0.5Mpa cleaning fluid by spray thrower 31 pairs of catalyst modules of spraying and cleaning apparatus 3 carry out large area cleaning 40min after, adopt high-pressure spray gun 32 more manually to a cleaning catalyst module 40min, the percentage by weight of described cleaning fluid consists of: OP-102.0%, JFC 2.0%, surplus are water;
(3) deionized water rinsing after ultrasonic cleaning: the catalyst module 2 after cleaning showers is lifted to store have ultrasonic cleaning liquid ultrasonic cleaning pond 5 in ultrasonic cleaning 30min, then catalyst module lifting uses deionized water rinsing 30min to manual cleaning district 6, hyperacoustic frequency is 28KHZ, during ultrasonic vibration cleaning, intermittent aerating process, the material departing from catalyst module surface can be taken away catalyst surface by aeration, improve cleaning effect, wherein, aeration pressure is 0.5Mpa, the percentage by weight of ultrasonic cleaning liquid consists of: OP-102.0%, JFC 2.0%, surplus is water,
(4) pickling: the catalyst module 2 after manual cleaning is lifted have 60 DEG C to storing, concentration is pickling 50min in the pickling tube 7 of the aqueous sulfuric acid of 2mol/L, and carries out Air Exposure simultaneously, aeration pressure is 0.5Mpa; Catalyst module 2 after pickling is lifted and drains without obvious fluid drips pouring outflow to draining basket 8;
(5) activating solution soaks: lifted by the catalyst module 2 after draining and soak 3h to the activating tank 9 of 65 DEG C, activating solution used re-uses after homogenizing 5h at 90 DEG C, activating solution is the mixed solution of ammonium metavanadate, ammonium paramolybdate, with metal oxide, the percentage by weight of activating solution consists of: V
2o
50.8%, MoO
30.15%, surplus is water;
(6) dry, calcining: the catalyst module 2 after activating solution soaks first after dry 6h, is transported in 500 DEG C of calcining furnaces 13 and calcines 6h under the effect of track conveying device 11 in 100 DEG C of drying ovens 12.
embodiment 4
Adopt the equipment identical with the embodiment 1 pair SCR denitration module identical with embodiment 1 specification to carry out regeneration to process, comprise the following steps:
(1) catalyst module 2 is placed on track conveying device, adopts the dedusting of Moveable industrial dust exhauster 1 pair of catalyst module 2 negative-pressure adsorption, and the artificial through hole that hockets, deashing process of giving a farfetched interpretation, improve deashing dust removing effects;
(2) cleaning showers, high-pressure spray gun cleaning: after go-cart is put in catalyst module 2 lifting after deashing dedusting, move in spraying and cleaning apparatus along track conveying device 14, first adopt spray pressure be 0.6Mpa cleaning fluid by spray thrower 31 pairs of catalyst modules of spraying and cleaning apparatus 3 carry out large area cleaning 30min after, adopt high-pressure spray gun 32 more manually to a cleaning catalyst module 30min, the percentage by weight of described cleaning fluid consists of: dodecyl sodium sulfate 1.0%, JFC 1.0%, surplus are water;
(3) deionized water rinsing after ultrasonic cleaning: the catalyst module 2 after cleaning showers is lifted to store have ultrasonic cleaning liquid ultrasonic cleaning pond 5 in ultrasonic cleaning 40min, then catalyst module lifting uses deionized water rinsing 40min to manual cleaning district 6, hyperacoustic frequency is 28KHZ, during ultrasonic vibration cleaning, intermittent aerating process, the material departing from catalyst module surface can be taken away catalyst surface by aeration, improve cleaning effect, wherein, aeration pressure is 0.6Mpa, the percentage by weight of ultrasonic cleaning liquid consists of: dodecyl sodium sulfate 1.0%, JFC 1.0%, surplus is water,
(4) pickling: lifted by the catalyst module 2 after manual cleaning to entering to store to have 65 DEG C, concentration is pickling 130min in the pickling tube 7 of the aqueous sulfuric acid of 1mol/L, and carries out Air Exposure simultaneously, aeration pressure is 0.6Mpa; Catalyst module lifting after pickling is drained to draining basket 8 and drenches outflow without obvious fluid drips;
(5) activating solution soaks: lifted by the catalyst module 2 after draining and soak 5h to the activating tank 9 entering 63 DEG C, activating solution used re-uses after homogenizing 6h at 80 DEG C, activating solution is the mixed solution of ammonium vanadate, ammonium heptamolybdate, with metal oxide, the percentage by weight of activating solution consists of: V
2o
55.0%, MoO
31.0%, surplus is water;
(6) dry, calcining: the catalyst module 2 after activating solution soaks first after dry 9h, is transported in 600 DEG C of calcining furnaces 13 and calcines 4h under the effect of track conveying device 11 in 90 DEG C of drying ovens 12.
embodiment 5
The step of renovation process reference example 4, be that the composition of activating solution is different from the difference of embodiment 4, the activating solution used is vanadyl oxalate, the mixed aqueous solution of ammonium tetramolybdate or ammonium dimolybdate, and with metal oxide, the percentage by weight of activating solution consists of: V
2o
53%, MoO
30.6%, surplus is water.
embodiment 6 Performance Detection
Use routine techniques means to detect the performance of regeneration SCR denitration and fresh SCR denitration, testing result is in table 1.
After table 1 regenerates/fresh SCR denitration performance
As can be seen from Table 1, compared with fresh SCR denitration, axis and the radial crushing strength of regeneration SCR denitration do not change substantially, wear and tear less in regenerative process; After regeneration, the specific area of SCR denitration returns to initial level, has longer service life.Meanwhile, in the process of deashing to pickling, achieve the thorough cleaning of catalyst, acid cleaning process adds the sour position of catalyst, promotes the carrying out of interfacial reaction; It is more even that activating solution immersion process makes active material disperse, and adds active reaction center, therefore catalyst activity return to fresh catalyst level, even increase.
Claims (10)
1. a waste flue gas denitration catalyst renovation process, is characterized in that, comprises the following steps:
(1) negative-pressure adsorption dedusting is adopted to carry out deashing process to waste flue gas denitration catalyst module;
(2) cleaning showers, high-pressure spray gun cleaning: first carry out cleaning showers 5 ~ 60min to catalyst module, spray pressure 0.5 ~ 1.3Mpa, then with high-pressure spray gun cleaning 5 ~ 60min; The percentage by weight of spray and spray gun cleaning fluid consists of: surfactant 0.1 ~ 3.0%, penetrating agent JFC 0.1 ~ 3.0%, surplus are water;
(3) deionized water rinsing after ultrasonic cleaning: catalyst module is placed in ultrasonic cleaning liquid ultrasonic vibration process 5 ~ 60min, the percentage by weight of ultrasonic cleaning liquid consists of; Surfactant 0.3 ~ 3.0%, penetrating agent JFC 0.3 ~ 3.0%, surplus is water; Then deionized water rinsing 5 ~ 60min is used;
(4) pickling: pickling 10 ~ 180min at 50 ~ 70 DEG C, drains;
(5) activating solution soaks: at 60 ~ 70 DEG C, use activating solution to soak 0.5 ~ 6h; Described activating solution is V
2o
5-WO
3or V
2o
5-MoO
3the aqueous solution of presoma, V
2o
5-WO
3activating solution consists of with its percentage by weight of metal oxide: V
2o
50.8 ~ 5.0%, WO
30.3 ~ 1.0%, surplus is water, V
2o
5-MoO
3activating solution consists of with its percentage by weight of metal oxide: V
2o
50.8 ~ 5.0%, MoO
30.15 ~ 1.0%, surplus is water;
(6) dry, calcining: first dry 1 ~ 12h at 70 ~ 120 DEG C, then in 300 ~ 700 DEG C of calcining 1 ~ 12h.
2. waste flue gas denitration catalyst renovation process according to claim 1, is characterized in that, in the ultrasonic cleaning process of step (3), carries out intermittent aeration process to catalyst module, and aeration pressure is 0.2 ~ 0.8Mpa.
3. waste flue gas denitration catalyst renovation process according to claim 1 and 2, is characterized in that, in step (2) and (3), described surfactant is OP-10 or dodecyl sodium sulfate.
4. waste flue gas denitration catalyst renovation process according to claim 1, is characterized in that, in step (4), carries out aeration while pickling, and aeration pressure is 0.2 ~ 0.8Mpa.
5. waste flue gas denitration catalyst renovation process according to claim 1, is characterized in that, in step (5), and V
2o
5presoma be selected from one in vanadyl oxalate, ammonium vanadate and ammonium metavanadate; WO
3presoma be ammonium metatungstate or ammonium paratungstate; MoO
3presoma be selected from one in ammonium paramolybdate, ammonium dimolybdate, ammonium tetramolybdate and ammonium heptamolybdate.
6. waste flue gas denitration catalyst renovation process according to claim 1 or 5, is characterized in that, in step (5), before using activating solution to soak catalyst module, first activating solution is stirred 1 ~ 10h at 70 ~ 110 DEG C.
7. a waste flue gas denitration catalyst reclaim equiment, it is characterized in that, comprise set gradually track conveying device, spraying and cleaning apparatus, ultrasonic cleaning pond, washed with de-ionized water device, pickling tube, draining basket, activating tank, track conveying device, tunnel type drying oven and tunnel type calcining furnace; Moving vacuum cleaner is provided with above the leading portion of track conveying device, the back segment of track conveying device is through spraying and cleaning apparatus, described spraying and cleaning apparatus comprises to be located at spray thrower above track conveying device and giant, to be located at cleaning fluid collecting pit below track conveying device, the vertical screen pack be positioned at below spray thrower front end is provided with in cleaning fluid collecting pit, cleaning fluid collecting pit is divided into former and later two ponds by screen pack, be provided with circulating pump in the pond of front end, giant is connected with circulating pump respectively with spray thrower; Pickle collecting pit is provided with below draining basket; Be provided with hanging apparatus between track conveying device end and track conveying device front end, track conveying device passes through tunnel formula drying oven and tunnel type calcining furnace.
8. waste flue gas denitration catalyst reclaim equiment according to claim 7, is characterized in that, spraying and cleaning apparatus, ultrasonic cleaning pond, pickling tube and activating tank are connected to waste liquid circulation treating apparatus.
9. the waste flue gas denitration catalyst reclaim equiment according to claim 7 or 8, is characterized in that, is respectively equipped with aeration tube bottom described ultrasonic cleaning pond, pickling tube and activating tank.
10. waste flue gas denitration catalyst reclaim equiment according to claim 9, is characterized in that, described equipment also comprises activating solution reactor, and the discharging opening of activating solution reactor is communicated with activating tank.
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772028A (en) * | 2016-03-28 | 2016-07-20 | 武汉龙净环保科技有限公司 | Regeneration method for SCR (Selective Catalytic Reduction) denitration catalyst V2O5-WO3/TiO2 |
| CN105771643A (en) * | 2016-05-04 | 2016-07-20 | 中冶华天工程技术有限公司 | Online cleaning method and device for recovering activity of low-temperature denitration catalyst |
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| CN106622397A (en) * | 2017-02-16 | 2017-05-10 | 宁波诺威尔大气污染控制科技有限公司 | Automatic regeneration device for SCR (Selective Catalytic Reduction) denitration catalyst module and regeneration process thereof |
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| CN107126977A (en) * | 2016-02-29 | 2017-09-05 | 神华集团有限责任公司 | The method of cleansing composition and regeneration of deactivated denitrating catalyst |
| CN107252706A (en) * | 2017-06-07 | 2017-10-17 | 江苏龙净科杰催化剂再生有限公司 | The minimizing technology of metal oxide in poisoning denitrating catalyst |
| CN107961818A (en) * | 2017-12-06 | 2018-04-27 | 南京威安新材料科技有限公司 | The renovation process and production equipment of flue gas SCR catalyst |
| CN107983419A (en) * | 2017-12-15 | 2018-05-04 | 江苏龙净科杰催化剂再生有限公司 | The atomic layer deposition method regeneration technology of denitrating catalyst |
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| CN108499616A (en) * | 2018-03-20 | 2018-09-07 | 长沙理工大学 | Vehicular SCR catalyst situ regeneration is equipped |
| CN112090453A (en) * | 2020-10-15 | 2020-12-18 | 福建龙净环保股份有限公司 | Regeneration method and regeneration equipment for deactivated catalytic ceramic filter tube |
| CN112427050A (en) * | 2020-11-17 | 2021-03-02 | 北京科技大学 | Green recycling method of honeycomb type denitration catalyst |
| CN112642496A (en) * | 2020-11-18 | 2021-04-13 | 苏州西热节能环保技术有限公司 | Regenerated catalyst capable of realizing synchronous denitration and VOCs and CO removal and preparation method thereof |
| CN112958165A (en) * | 2021-02-26 | 2021-06-15 | 无锡迅德环保工程有限公司 | Technological process of SCR denitration catalyst regeneration production line |
| TWI757916B (en) * | 2020-10-14 | 2022-03-11 | 中國鋼鐵股份有限公司 | Method for recycling waste selective catalytic reduction catalyst, and selective catalytic reduction catalyst and method for producing the same |
| CN114917963A (en) * | 2022-05-11 | 2022-08-19 | 湖北景目环保科技有限公司 | SCR denitration catalyst cleaning and regenerating process |
| CN115970675A (en) * | 2022-12-05 | 2023-04-18 | 苏州西热节能环保技术有限公司 | Preparation method of heterogeneous SCR denitration catalyst with high denitration efficiency |
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| CN107126977A (en) * | 2016-02-29 | 2017-09-05 | 神华集团有限责任公司 | The method of cleansing composition and regeneration of deactivated denitrating catalyst |
| CN107126977B (en) * | 2016-02-29 | 2020-04-17 | 神华集团有限责任公司 | Cleaning agent composition and method for regenerating deactivated denitration catalyst |
| CN105772028A (en) * | 2016-03-28 | 2016-07-20 | 武汉龙净环保科技有限公司 | Regeneration method for SCR (Selective Catalytic Reduction) denitration catalyst V2O5-WO3/TiO2 |
| CN105771643A (en) * | 2016-05-04 | 2016-07-20 | 中冶华天工程技术有限公司 | Online cleaning method and device for recovering activity of low-temperature denitration catalyst |
| CN105945036A (en) * | 2016-06-22 | 2016-09-21 | 中电恒德（北京）环保投资有限公司 | Pretreatment method for waste smoke selective denitration catalyst |
| CN105945036B (en) * | 2016-06-22 | 2017-12-29 | 中电恒德（北京）环保投资有限公司 | A kind of preprocess method to flue gas selective denitrification catalyst |
| CN106179531A (en) * | 2016-07-13 | 2016-12-07 | 安徽元琛环保科技股份有限公司 | A kind of preparation method of the regeneration denitrification catalyst module for power plant's worst cold case |
| CN106732821A (en) * | 2016-12-30 | 2017-05-31 | 福建龙净环保股份有限公司 | A kind of renovation process of useless denitrating catalyst |
| CN106694467A (en) * | 2017-01-09 | 2017-05-24 | 安徽元琛环保科技股份有限公司 | Cleaning device and method and regeneration method for waste denitration catalyst |
| CN106622397A (en) * | 2017-02-16 | 2017-05-10 | 宁波诺威尔大气污染控制科技有限公司 | Automatic regeneration device for SCR (Selective Catalytic Reduction) denitration catalyst module and regeneration process thereof |
| CN107252706A (en) * | 2017-06-07 | 2017-10-17 | 江苏龙净科杰催化剂再生有限公司 | The minimizing technology of metal oxide in poisoning denitrating catalyst |
| CN107961818A (en) * | 2017-12-06 | 2018-04-27 | 南京威安新材料科技有限公司 | The renovation process and production equipment of flue gas SCR catalyst |
| CN108014818A (en) * | 2017-12-15 | 2018-05-11 | 江苏龙净科杰催化剂再生有限公司 | The regeneration technology of denitrating catalyst |
| CN107983419A (en) * | 2017-12-15 | 2018-05-04 | 江苏龙净科杰催化剂再生有限公司 | The atomic layer deposition method regeneration technology of denitrating catalyst |
| CN108499616A (en) * | 2018-03-20 | 2018-09-07 | 长沙理工大学 | Vehicular SCR catalyst situ regeneration is equipped |
| CN108499616B (en) * | 2018-03-20 | 2021-07-20 | 长沙理工大学 | Vehicle-mounted SCR catalyst on-site regeneration equipment |
| TWI757916B (en) * | 2020-10-14 | 2022-03-11 | 中國鋼鐵股份有限公司 | Method for recycling waste selective catalytic reduction catalyst, and selective catalytic reduction catalyst and method for producing the same |
| CN112090453A (en) * | 2020-10-15 | 2020-12-18 | 福建龙净环保股份有限公司 | Regeneration method and regeneration equipment for deactivated catalytic ceramic filter tube |
| CN112427050A (en) * | 2020-11-17 | 2021-03-02 | 北京科技大学 | Green recycling method of honeycomb type denitration catalyst |
| CN112427050B (en) * | 2020-11-17 | 2022-02-18 | 北京科技大学 | Green recycling method of honeycomb type denitration catalyst |
| CN112642496A (en) * | 2020-11-18 | 2021-04-13 | 苏州西热节能环保技术有限公司 | Regenerated catalyst capable of realizing synchronous denitration and VOCs and CO removal and preparation method thereof |
| CN112642496B (en) * | 2020-11-18 | 2023-11-10 | 苏州西热节能环保技术有限公司 | Regenerated catalyst capable of realizing synchronous denitration and VOCs (volatile organic compounds) and CO and preparation method thereof |
| CN112958165A (en) * | 2021-02-26 | 2021-06-15 | 无锡迅德环保工程有限公司 | Technological process of SCR denitration catalyst regeneration production line |
| CN114917963A (en) * | 2022-05-11 | 2022-08-19 | 湖北景目环保科技有限公司 | SCR denitration catalyst cleaning and regenerating process |
| CN115970675A (en) * | 2022-12-05 | 2023-04-18 | 苏州西热节能环保技术有限公司 | Preparation method of heterogeneous SCR denitration catalyst with high denitration efficiency |
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Application publication date: 20150909 |