CN202845023U - Heat treatment regeneration device of SCR (Selective Catalytic Reduction) denitration catalyst - Google Patents
Heat treatment regeneration device of SCR (Selective Catalytic Reduction) denitration catalyst Download PDFInfo
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- CN202845023U CN202845023U CN 201220494808 CN201220494808U CN202845023U CN 202845023 U CN202845023 U CN 202845023U CN 201220494808 CN201220494808 CN 201220494808 CN 201220494808 U CN201220494808 U CN 201220494808U CN 202845023 U CN202845023 U CN 202845023U
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- 239000003054 catalyst Substances 0.000 title claims abstract description 124
- 238000011069 regeneration method Methods 0.000 title claims abstract description 51
- 230000008929 regeneration Effects 0.000 title claims abstract description 49
- 238000010438 heat treatment Methods 0.000 title abstract description 9
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000007789 gas Substances 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000003860 storage Methods 0.000 claims abstract description 24
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 20
- 239000000428 dust Substances 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 238000010926 purge Methods 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 37
- 230000008569 process Effects 0.000 claims description 27
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 20
- 230000002779 inactivation Effects 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 239000003595 mist Substances 0.000 claims description 15
- 230000009719 regenerative response Effects 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 14
- 239000006096 absorbing agent Substances 0.000 claims description 11
- 238000002203 pretreatment Methods 0.000 claims description 11
- 230000001172 regenerating effect Effects 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 238000013517 stratification Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- 238000012545 processing Methods 0.000 abstract description 7
- 229910000069 nitrogen hydride Inorganic materials 0.000 abstract description 4
- 238000007664 blowing Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000178 monomer Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 238000012856 packing Methods 0.000 description 6
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 5
- 230000009849 deactivation Effects 0.000 description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 3
- 235000011130 ammonium sulphate Nutrition 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
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- 238000009418 renovation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- ZSDSQXJSNMTJDA-UHFFFAOYSA-N trifluralin Chemical compound CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O ZSDSQXJSNMTJDA-UHFFFAOYSA-N 0.000 description 3
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
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- 208000008316 Arsenic Poisoning Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
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- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- -1 ammonium sulfate compound Chemical class 0.000 description 1
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- 229910052720 vanadium Inorganic materials 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a heat treatment regeneration device of a SCR (Selective Catalytic Reduction) denitration catalyst. The regeneration device comprises a pretreatment mechanism, a regeneration reaction mechanism and a tail gas absorbing mechanism arranged sequentially. The regeneration reaction mechanism comprises an ammonia storage tank, a nitrogen storage tank, a mixed preheating furnace, a regeneration reaction furnace and a condenser. The ammonia storage tank and the nitrogen storage tank are communicated with the mixed preheating furnace through a pipeline respectively, and NH3 and N2 are introduced into the mixed preheating furnace. The mixed preheating furnace, the regeneration reaction furnace and the condenser are connected sequentially. A heater is arranged in the regeneration reaction furnace, a catalyst which is deactivated after being subjected to dust blowing processing is placed in a furnace hearth, the mixed gas of NH3 and N2 enters the regeneration reaction furnace through the mixed preheating furnace so as to conduct heat treatment regeneration on the deactivated catalyst in the furnace hearth. The device is simple in structure and easy to operate. By using the device, cost for exchanging the catalyst is reduced, and the service life of catalyst is prolonged.
Description
Technical field
The utility model relates to the treatment facility of SCR denitrating catalyst, specifically a kind of thermal process regeneration device of SCR denitrating catalyst.
Background technology
Nitrogen oxide is one of main atmosphere pollution, can bring the environmental problems such as acid rain, photochemical fog, and the fume emission of coal-burning power plant is the main source of artificial nitrogen oxide.In recent years, the discharge capacity of China's coal-burning power plant's nitrogen oxide constantly rose, and the environmental protection situation is increasingly severe, China's will go into overdrive strictly to control discharging of nitrogen oxide.According to " fossil-fuel power plant atmospheric pollutant emission standard " requirement (GB13223-2011) of up-to-date promulgation, the discharged nitrous oxides of newly-built thermal power generation boiler will be carried out 100mg/m from 1 day January in 2012
3Emission limit.Along with the continuous increase of environmental pressure and the increasingly stringent of environmental protection standard, the coal-fired plant flue gas denitration has become another efforts at environmental protection emphasis after flue gas desulfurization.
Selective catalytic reduction (Selective Catalytic Redcution, SCR) is most widely used, the most ripe flue-gas denitration process of present coal-burning power plant, has that efficient is high, the selective advantage such as good, stable.Present newly-built coal-burning power plant is auxiliary construction SCR denitrating system, and the existing coal-burning power plant of part also progressively begins the transformation of SCR denitrating system according to the requirement of environmental protection.According to data statistics, SCR denitration engineering contract capacity reached 57950MW in 2011, and the SCR denitration engineering that totally puts into operation at present surpasses 90000MW.
The SCR denitrating catalyst is the core place of SCR denitrating system, and is high owing to catalyst raw material price, produce the reason such as not yet fully production domesticization, causes the expensive of catalyst, and the catalyst cost accounts for 20%～40% of denitration engineering totle drilling cost in the initial stage input.Large scale construction along with the SCR of coal-burning power plant denitration engineering, the use amount of SCR catalyst increases greatly, and only be 2-3 the service life of present SCR catalyst, the cost that can save catalyst change is processed in the regeneration of decaying catalyst, the secondary pollution of avoiding simultaneously decaying catalyst to bring has good economic benefit and environmental benefit.
Publication number is renovation process and the device that the patent of invention of CN102266723A has proposed a kind of denitrifying catalyst with selective catalytic reduction, the poisoning SCR denitrating catalyst that practical application in industry is crossed activates and calcine technology through ultrasonic pretreatment, deionized water washing, expanding agent immersion, HTHP evaporation, active material successively, so that catalyst can regeneration.
Publication number is that the Chinese invention patent of CN102101060A has proposed a kind of technique for restoring activity of smoke denitration catalyst and device, and the device of this regenerative process includes soot blower, ultrasonic cleaning pond, chemical activation pond, rinsing bath, drying device etc.Above two kinds of methods can realize the recovery of catalyst activity, but the use amount of activating solution, regenerated liquid is larger in the processing procedure, and regeneration cost is higher, simultaneously catalyst are carried out wet-cleaning, and the mechanical strength of catalyst is had to a certain degree impact.
Publication number then provides ozone treatment renovation process and the device of a kind of vanadium titanium-base flue gas denitration catalyst agent for the Chinese invention patent of CN102133547A, the method is carried out oxidation processes with ozone-air gas mixture to catalyst, namely finishes the regenerative process of catalyst for denitrating flue gas.
Studies show that at present, cause the reason of SCR catalysqt deactivation to mainly contain: mechanical wear, the catalyst that flying dust, sulfate etc. causes stops up, catalyst alkali metal, arsenic poisoning etc.The deactivation cause of SCR catalyst and the smoke components of coal-burning power plant and the method for operation are closely related, and according to the practical operation situation of coal-burning power plant, it is the main cause that causes at present the SCR catalysqt deactivation that catalyst stops up.At present, the high cloud of dust gas section arrangement of the most of employing of SCR system, namely the SCR reactor is arranged between air preheater and the economizer, and dustiness is high in this section flue gas, and a large amount of flying dust granules can be accumulated in catalyst surface behind the long-play, hinder NH
3Deng arriving the catalyst activity position, cause catalysqt deactivation; In addition, the SO in the flue gas
2, SO
3Deng meeting and NH
3The generation ammonium sulfate compound that reacts, such as ammonium sulfate, ammonium hydrogen sulfate etc., this type of material can be adsorbed on catalyst surface, and its active sites is covered, and affects the carrying out of normal reaction.Main chemical equation has:
SO
2+1/2O
2→SO
3
SO
3+2NH
3+H
2O→(NH
4)
2SO
4
SO
3+NH
3+H
2O→NH
4HSO
4
The utility model content
The purpose of this utility model provides a kind of thermal process regeneration device of SCR denitrating catalyst, this apparatus structure is simple, easy operating, the regeneration that can be applicable to the SCR denitrating catalyst is processed, being particularly useful for catalyst stops up and the type of inactivation, adopt this device can reduce the expense of catalyst change, the service life of extending catalyst.
This purpose of the present utility model realizes by the following technical solutions: a kind of thermal process regeneration device of SCR denitrating catalyst, it is characterized in that: this regenerating unit comprises pre-treatment mechanism, regenerative response mechanism and the tail gas absorbing mechanism of placing successively, and regenerative response mechanism is connected with tail gas absorbing mechanism; Described pre-treatment mechanism comprises compressed air reservoir, purge nozzle and purges the pond, purge the catalyst of placing inactivation in the pond, described compressed air reservoir is connected by pipeline with purge nozzle, purge nozzle is over against the Chi Kou that purges the pond, be used for that the catalyst that purges inactivation in the pond is blown ash and process, remove the superficial dust of catalyst; Described regenerative response mechanism comprises ammonia storage tank, nitrogen storage tank, mixing preheating furnace, converter and condenser, described ammonia storage tank, nitrogen storage tank respectively with mix preheating furnace by pipeline connection, pass into NH to mixing in the preheating furnace
3With N
2, described mixing preheating furnace, converter are connected with condenser and are connected, and described converter is provided with heater, places the catalyst that blows the inactivation after ash is processed in the burner hearth, NH
3With N
2Mist after mixing preheating furnace, enter converter, the catalyst to inactivation in burner hearth is heat-treated regeneration; Described tail gas absorbing mechanism comprises continuous sulfur dioxide absorber and ammonia scrubber, and wherein, condenser is communicated with the sulfur dioxide absorber, and the reacted tail gas of converter enters tail gas absorbing mechanism to absorb the SO in the tail gas after the condenser cooling
2And NH
3
Regenerative response mechanism described in the utility model is tubular react furnace, will pack in the reacting furnace through the catalyst after the purge, is provided with heater in the stove, and temperature remains on 360～420 ℃ in the control stove, and the used gas of regenerative response is by 3～5%NH
3With N
2Mist forms, and passes in the tubular react furnace after mixing preheating, and gas flow is regulated by mass flowmenter, and the control gas flow is that 5-10L/min heat-treats reaction, successive reaction 3-5h.
In the utility model, described pre-treatment mechanism also comprises ash collection slot, and this ash collection slot is positioned at the bottom that purges the pond, is used for collecting the dust stratification that purges the pond.This pre-treatment mechanism upper end is connected to the compressed air blow valve port, the purging that can move and stretch, and blowing medium is clean dried compressed air, purging pressure is 0.4-0.6MPa; Mechanism bottom is provided with ash collection slot, is used for collecting the dust impurity that purges etc.
In the utility model, be provided with pressure-reducing valve and mass flowmenter on described compressed air reservoir and the pipeline that purge nozzle is connected, be used for the purging pressure of control purge nozzle.
In the utility model, the outer wall of described converter also is coated with one deck insulating.
In the utility model, described ammonia storage tank with mix the pipeline that preheating furnace is communicated with on be provided with pressure-reducing valve and mass flowmenter, also be provided with pressure-reducing valve and mass flowmenter on described nitrogen storage tank and the pipeline that the mixing preheating furnace is communicated with.
Tail gas absorbing mechanism described in the utility model is comprised of the absorption bottle of two or more series connection, is used for absorbing the NH of tail gas
3And SO
2, wherein, described sulfur dioxide absorber is absorption bottle, the splendid attire mass fraction is 3% aqua calcis in this absorption bottle, is used for absorbing the SO of tail gas
2And dissolving part NH
3Described ammonia scrubber is absorption bottle, and splendid attire concentration is 10% sulfuric acid solution in this absorption bottle, is used for absorbing the NH of tail gas
3
Compared with prior art, the utlity model has following remarkable result:
(1) that dust stratification, sulfate are stopped up serious SCR denitrating catalyst regeneration treatment effect is obvious for the utility model, catalyst surface dust stratification situation after regeneration is processed is obviously improved, the activity of catalyst is greatly improved before regenerating, and the catalyst after the regeneration satisfies the requirement of actual industrial operation;
(2) required compressed air and ammonia are gas commonly used in coal-burning power plant's denitrating system running in the regenerating unit of the present utility model, are easy to obtain, and greatly reduce the maintenance cost of the SCR of enterprise denitrating catalyst;
(3) the utility model, can effectively be avoided washing the decline of catalyst mechanical strength and the surface active composition losing issue that regeneration or acid reclaim etc. cause almost without damaging to catalyst body, and regeneration cost is low;
(4) tail gas of the present utility model absorbing mechanism can absorb the NH in the tail gas
3, SO
2Deng, can not cause secondary pollution to environment;
(5) regenerating unit of the present utility model is simple, and economical and efficient has a good application prospect.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the overall structure schematic diagram of the thermal process regeneration device of the utility model SCR denitrating catalyst.
Description of reference numerals
1, compressed air reservoir; 2, pressure-reducing valve; 3, mass flowmenter; 4, purge nozzle; 5, purge the pond; 6, ash collection slot; 7, exhaust outlet; 8, ammonia storage tank; 9, nitrogen storage tank; 10, temperature controller; 11, mix preheating furnace; 12, converter; 13, insulating; 14, heater; 15, condenser; 16, the sulfur dioxide absorber 1; 17, ammonia scrubber
The specific embodiment
Embodiment 1
Adopt method of the present utility model, to the processing of regenerating of the honeycomb fashion SCR denitrating catalyst monomer of an inactivation.The catalyst A of getting is the honeycomb type denitrification catalyst monomer of 150mm * 150mm * 850mm, and the cross section specification is 16 holes * 16 holes.
The thermal process regeneration method of this SCR denitrating catalyst comprises the steps:
(1) at first the catalyst monomer of inactivation is placed and purge the pond, open compressed air, adopt compressed air that the catalyst of inactivation is blown ash and process, remove the superficial dust of catalyst, keeping purging pressure is 0.5MPa, continues to purge 10min;
The catalyst monomer that (2) will blow after ash is processed takes out in the converter of packing into, and startup regenerative response device carries out heat regeneration to catalyst to be processed, and passes into NH
3With N
2Mist, regulate mist NH by mass flowmenter
3With N
2The total flow of mist be 10L/min, wherein, NH
3What shared volume accounted for whole mist volume is 3%,, be heat treatment 3h under 365 ℃ the temperature in furnace temperature, finish the hot regeneration process of catalyst;
(3) tail gas after step (2) is processed passes in the tail gas absorbing mechanism that absorption liquid is housed, and absorbs the SO in the tail gas
2, NH
3
Realize above-mentioned SCR denitrating catalyst heat treatment method regenerating unit as shown in Figure 1, this regenerating unit comprises successively pre-treatment mechanism, regenerative response mechanism and the tail gas absorbing mechanism of placing, regenerative response mechanism is connected with tail gas absorbing mechanism; Pre-treatment mechanism comprises compressed air reservoir 1, purge nozzle 4 and purges pond 5, purge the catalyst of pond 5 interior placement inactivations, compressed air reservoir 1 and purge nozzle 4 are connected by pipeline, be provided with pressure-reducing valve 2 and mass flowmenter 3 on compressed air reservoir 1 and the pipeline that purge nozzle 4 is connected, purge nozzle 4 is over against the Chi Kou that purges pond 5, be used for that the catalyst that purges pond 5 interior inactivations is blown ash and process, remove the superficial dust of catalyst; Regenerative response mechanism comprises ammonia storage tank 8, nitrogen storage tank 9, mixes preheating furnace 11, converter 12 and condenser 15, ammonia storage tank 8, nitrogen storage tank 9 respectively with mixes preheating furnace 11 by pipeline connection, in mixing preheating furnace 11, pass into NH
3With N
2Ammonia storage tank 8 with mix the pipeline that preheating furnace 11 is communicated with on be provided with pressure-reducing valve 2 and mass flowmenter 3, nitrogen storage tank 9 with mix the pipeline that preheating furnace 11 is communicated with on also be provided with pressure-reducing valve 2 and mass flowmenter 3, mixing preheating furnace 11, converter 12 is connected with condenser and connects successively, converter 12 is provided with heater 14, furnace temperature shows and control by the temperature controller 10 that is arranged in the burner hearth, place the catalyst that blows the inactivation after ash is processed in the burner hearth, the outer wall of converter 12 also is coated with one deck insulating 13, NH
3With N
2Mist after mixing preheating furnace 11, enter converter 12, the catalyst to inactivation in burner hearth is heat-treated regeneration; Tail gas absorbing mechanism comprises continuous sulfur dioxide absorber 16 and ammonia scrubber 17, wherein, condenser 15 is communicated with sulfur dioxide absorber 16, and converter 12 reacted tail gas enter tail gas absorbing mechanism to absorb the SO in the tail gas after condenser 15 coolings
2And NH
3
In the utility model, pre-treatment mechanism also comprises ash collection slot 6, and this ash collection slot 6 is positioned at the bottom that purges pond 5, is used for the dust stratification impurity in collection purging pond 5 etc., and ash collection slot 6 sides also are provided with exhaust outlet 7.
In the utility model, sulfur dioxide absorber 16 is absorption bottle, and the splendid attire mass fraction is 3% aqua calcis in this absorption bottle, is used for absorbing the SO of tail gas
2And dissolving part NH
3Ammonia scrubber 17 is absorption bottle, and splendid attire concentration is 10% sulfuric acid solution in this absorption bottle, is used for absorbing the NH of tail gas
3
Described pre-treatment mechanism is connected to the airtight container that compressed air is blown into mouthful, described regenerative response mechanism is the tubular react furnace that is provided with heating arrangements, to pack in the reacting furnace through the catalyst after the purge, be provided with heater in the stove, gas flow is regulated by mass flowmenter, heat-treat reaction, described tail gas absorbing mechanism is comprised of the absorber of two or more series connection.
In converter, the meetings such as ammonium sulfate, ammonium hydrogen sulfate that are attached to catalyst surface are decomposed, thereby the blocked active sites of catalyst surface is restored, and make that the SCR denitration reaction is active to be improved, and main chemical equation has:
(NH
4)
2SO
4→SO
3+2NH
3+H
2O
NH
4HSO
4→SO
3+NH
3+H
2O
SO
3→SO
2+1/2O
2
SCR denitrating catalyst regenerability test: the catalyst activity evaluating apparatus of packing into of the catalyst A intercepting catalyst test unit after the regeneration is tested, and compares before the regeneration, and the catalyst A denitration efficiency improves 23%; Other gets TriStar II 3020 type specific areas and the pore analysis instrument that the catalyst A sample adopts U.S. Micromeritics company to produce and carries out the test of BET specific area, and compares before the regeneration, and the catalyst A specific area increases by 57.1%.
Embodiment 2
Adopt method of the present utility model, to the processing of regenerating of the honeycomb type denitrification catalyst monomer of an inactivation.The catalyst B of getting is the honeycomb type denitrification catalyst monomer of 150mm * 150mm * 900mm, and the cross section specification is 18 holes * 18 holes.
The thermal process regeneration method of this SCR denitrating catalyst comprises the steps:
(1) at first the catalyst monomer of inactivation is placed and purge the pond, open compressed air, adopt compressed air that the catalyst of inactivation is blown ash and process, remove the superficial dust of catalyst, keeping purging pressure is 0.5MPa, continues to purge 15min;
The catalyst monomer that (2) will blow after ash is processed takes out in the converter of packing into, and startup regenerative response device carries out heat regeneration to catalyst to be processed, and passes into NH
3With N
2Mist, regulate mist NH by mass flowmenter
3With N
2The total flow of mist be 10L/min, wherein, NH
3What shared volume accounted for whole mist volume is 5%,, be heat treatment 3h under 380 ℃ the temperature in furnace temperature, finish the hot regeneration process of catalyst;
(3) tail gas after step (2) is processed passes in the tail gas absorbing mechanism that absorption liquid is housed, and absorbs the SO in the tail gas
2, NH
3
The regenerating unit of heat treatment method of realizing above-mentioned SCR denitrating catalyst is identical with embodiment 1, at this repeated description no longer.
SCR denitrating catalyst regenerability test: the catalyst activity evaluating apparatus of packing into of the catalyst B intercepting catalyst test unit after the regeneration is tested, and compares before the regeneration, and the catalyst B denitration efficiency improves 19%; Other gets TriStar II 3020 type specific areas and the pore analysis instrument that the catalyst B sample adopts U.S. Micromeritics company to produce and carries out the test of BET specific area, and compares before the regeneration, and the catalyst B specific area increases by 36.3%.
Embodiment 3
Adopt method described in the utility model, to the processing of regenerating of the honeycomb type denitrification catalyst monomer of an inactivation.The catalyst C that gets is the honeycomb type denitrification catalyst monomer of 150mm * 150mm * 900mm, and the cross section specification is 20 holes * 20 holes.At first the catalyst monomer being packed into purges in the pond, opens compressed air and purges, and keeping purging pressure is 0.5MPa, continues to purge 20min; Catalyst monomer after purging is taken out in the converter of packing into, start the regenerative response device catalyst is carried out heat regeneration processing, regulating mist by mass flowmenter is 5%NH
3-95%N
2, total flow is 10L/min, it is 385 ℃ that the reacting furnace temperature is set, and heat-treats continuously 5h, finishes hot regeneration process.
SCR denitrating catalyst regenerability test: the catalyst activity evaluating apparatus of packing into of the catalyst C intercepting catalyst test unit after the regeneration is tested, and compares before the regeneration, and catalyst C denitration efficiency improves 17%; Other gets TriStar II 3020 type specific areas and the pore analysis instrument that catalyst C sample adopts U.S. Micromeritics company to produce and carries out the test of BET specific area, and compares before the regeneration, and catalyst C specific area increases by 31.0%.
In the renovation process of the present utility model, can also do such as down conversion:
Described step (1) blow ash purge in processing pressure can be between 0.4～0.6MPa value, blowing time can be between 10～20min value.
Enter in the described step (2) flow of the mist of the NH3 of converter and N2 can be between 5～10L/min value, wherein, the shared volume of NH3 accounts for 3～5% of whole mist volume; The furnace temperature of converter can be between 360～420 ℃ value, heat treatment time can be between 3～5h value.
Above-described embodiment of the present utility model is not the restriction to the utility model protection domain; embodiment of the present utility model is not limited to this; all this kind is according to foregoing of the present utility model; ordinary skill knowledge and customary means according to this area; do not breaking away under the above-mentioned basic fundamental thought of the utility model prerequisite; modification, replacement or the change of other various ways that the utility model said structure is made all should drop within the protection domain of the present utility model.
Claims (7)
1. the thermal process regeneration device of a SCR denitrating catalyst is characterized in that: this regenerating unit comprises pre-treatment mechanism, regenerative response mechanism and the tail gas absorbing mechanism of placing successively, and regenerative response mechanism is connected with tail gas absorbing mechanism; Described pre-treatment mechanism comprises compressed air reservoir, purge nozzle and purges the pond, purge the catalyst of placing inactivation in the pond, described compressed air reservoir is connected by pipeline with purge nozzle, purge nozzle is over against the Chi Kou that purges the pond, be used for that the catalyst that purges inactivation in the pond is blown ash and process, remove the superficial dust of catalyst; Described regenerative response mechanism comprises ammonia storage tank, nitrogen storage tank, mixing preheating furnace, converter and condenser, described ammonia storage tank, nitrogen storage tank respectively with mix preheating furnace by pipeline connection, pass into NH to mixing in the preheating furnace
3With N
2, described mixing preheating furnace, converter are connected with condenser and are connected, and described converter is provided with heater, places the catalyst that blows the inactivation after ash is processed in the burner hearth, NH
3With N
2Mist after mixing preheating furnace, enter converter, the catalyst to inactivation in burner hearth is heat-treated regeneration; Described tail gas absorbing mechanism comprises continuous sulfur dioxide absorber and ammonia scrubber, and wherein, condenser is communicated with the sulfur dioxide absorber, and the reacted tail gas of converter enters tail gas absorbing mechanism to absorb the SO in the tail gas after the condenser cooling
2And NH
3
2. the thermal process regeneration device of SCR denitrating catalyst according to claim 1 is characterized in that: described pre-treatment mechanism also comprises ash collection slot, and this ash collection slot is positioned at the bottom that purges the pond, is used for collecting the dust stratification that purges the pond.
3. the thermal process regeneration device of SCR denitrating catalyst according to claim 1 is characterized in that: be provided with pressure-reducing valve and mass flowmenter on described compressed air reservoir and the pipeline that purge nozzle is connected.
4. the thermal process regeneration device of SCR denitrating catalyst according to claim 1, it is characterized in that: the outer wall of described converter also is coated with one deck insulating.
5. the thermal process regeneration device of SCR denitrating catalyst according to claim 1, it is characterized in that: described ammonia storage tank with mix the pipeline that preheating furnace is communicated with on be provided with pressure-reducing valve and mass flowmenter, also be provided with pressure-reducing valve and mass flowmenter on described nitrogen storage tank and the pipeline that the mixing preheating furnace is communicated with.
6. the thermal process regeneration device of SCR denitrating catalyst according to claim 1, it is characterized in that: described sulfur dioxide absorber is absorption bottle, the splendid attire mass fraction is 3% aqua calcis in this absorption bottle, is used for absorbing the SO of tail gas
2And dissolving part NH
3
7. the thermal process regeneration device of SCR denitrating catalyst according to claim 1, it is characterized in that: described ammonia scrubber is absorption bottle, splendid attire concentration is 10% sulfuric acid solution in this absorption bottle, is used for absorbing the NH of tail gas
3
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| CN 201220494808 CN202845023U (en) | 2012-09-26 | 2012-09-26 | Heat treatment regeneration device of SCR (Selective Catalytic Reduction) denitration catalyst |
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| CN 201220494808 CN202845023U (en) | 2012-09-26 | 2012-09-26 | Heat treatment regeneration device of SCR (Selective Catalytic Reduction) denitration catalyst |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909104A (en) * | 2012-09-26 | 2013-02-06 | 广东电网公司电力科学研究院 | Thermal regeneration method and device of SCR (selective catalytic reduction) denitration catalyst |
| CN104726713A (en) * | 2015-02-16 | 2015-06-24 | 浙江大学 | Process for comprehensive recovery of metal-containing oxides in disabled SCR (selective catalytic reduction) denitration catalyst |
| CN109926104A (en) * | 2019-03-25 | 2019-06-25 | 江苏奥利思特环保科技有限公司 | A kind of low-temperature denitration catalyst hot recycling device |
-
2012
- 2012-09-26 CN CN 201220494808 patent/CN202845023U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909104A (en) * | 2012-09-26 | 2013-02-06 | 广东电网公司电力科学研究院 | Thermal regeneration method and device of SCR (selective catalytic reduction) denitration catalyst |
| CN102909104B (en) * | 2012-09-26 | 2014-08-13 | 广东电网公司电力科学研究院 | Thermal regeneration method and device of SCR (selective catalytic reduction) denitration catalyst |
| CN104726713A (en) * | 2015-02-16 | 2015-06-24 | 浙江大学 | Process for comprehensive recovery of metal-containing oxides in disabled SCR (selective catalytic reduction) denitration catalyst |
| CN109926104A (en) * | 2019-03-25 | 2019-06-25 | 江苏奥利思特环保科技有限公司 | A kind of low-temperature denitration catalyst hot recycling device |
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