CN202315908U - Online regeneration system for flue gas denitrification catalyst - Google Patents
Online regeneration system for flue gas denitrification catalyst Download PDFInfo
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- CN202315908U CN202315908U CN2011204913148U CN201120491314U CN202315908U CN 202315908 U CN202315908 U CN 202315908U CN 2011204913148 U CN2011204913148 U CN 2011204913148U CN 201120491314 U CN201120491314 U CN 201120491314U CN 202315908 U CN202315908 U CN 202315908U
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- 230000008929 regeneration Effects 0.000 title claims abstract description 42
- 238000011069 regeneration method Methods 0.000 title claims abstract description 42
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000003546 flue gas Substances 0.000 title claims abstract description 37
- 230000001172 regenerating effect Effects 0.000 claims abstract description 60
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides an online regeneration system for a flue gas denitrification catalyst. The system comprises a flue external system, a flue internal system and a connecting pipeline, wherein the flue external system comprises a regeneration medium storing or generating part, a regeneration medium heating part and a regeneration medium conveying part; and the flue internal system comprises a regeneration medium distributing part which is arranged in the flue and can move to a position above any catalyst module in the flue. The regeneration medium storing or generating part, the regeneration medium heating part and the regeneration medium conveying part in the flue external system are adjusted and opened/closed, and regeneration media are conveyed to the regeneration medium distributing part in the flue so as to finish catalyst regenerating steps including dust blowing, cleaning, drying and activating of the catalyst module in the flue, and the catalyst module is not required to be shifted out of the flue to be regenerated. According to the utility model, the catalyst module is prevented from being damaged in the moving process, the operating steps are simplified, the energy consumption is reduced, the cost is reduced, and the working efficiency is improved.
Description
Technical field
The utility model belongs to the flue gas processing technology field, relates in particular to a kind of online regenerative system of catalyst for denitrating flue gas.
Background technology
Recently, country has issued the stricter atmosphere pollutants emission standards GB13223-2011 of thermal power plant, comes into effect from January 1st, 2012.Wherein the discharging to nitrogen oxide in thermal power plant's atmosphere pollution defines higher standard, so from 2012, the startup in national denitration market was imperative.
In power plant boiler at home and abroad and other power boiler flue gas denitrification system, about selective catalytic reduction, i.e. SCR method of adopting more than 90%.Use therein catalyst for denitrating flue gas is the honeycomb fashion that has catalytic activity, board-like, corrugated plate dst solid, vertically is covered with in one about 2 meters long, 1 meter wide, 2 meters high steel casing (no loam cake, grid is arranged at the bottom), constitutes the denitrating catalyst module.The place arranges three or four layers of steelframe in vertical flue different level cross section, occupies the denitrating catalyst module on every layer of steelframe compactly, is called the denitrating catalyst layer.In denitration when operation,, the flue gas that has sprayed into the selective reduction agent passes each denitrating catalyst layer from top to bottom successively, the nitrogen oxide in the flue gas under the catalysis of catalyst activity sex factor with reducing agent reaction generation nitrogen G&W.The SCR catalyst is in long-term use, and it is active to descend even lose activity, can't denitration, and catalyst accounts for 50% of whole denitrating flue gas cost, and catalyst is running stores, service life is generally in 16000～24000 hours.Expensive catalysts can lose efficacy after operation a period of time, and it is the effective way that prolongs its service life, reduces denitrating system operating cost that catalyst is regenerated.A large amount of scientific experiments prove that good regeneration can make spent catalyst return to more than 90% of original activity.
One Chinese patent application 200920039767.X discloses a kind of utility model patent of regenerated offline device of denitrating catalyst; This utility model is that catalyst module is hung out flue; Each catalyst module respectively in regenerating unit experience blow ash, cleaning, drying, activation, dry a plurality of operation, i.e. regenerated offline again.Its weak point is: 1, from flue, remove before the catalyst module regeneration and hang out ground, hang in flue after the regeneration playback is installed again, quantities is very big; 2, because the regenerating unit ability is limit, can only regenerate one by one to individual module, each module need lift five ponds of turnover could accomplish whole step for regeneration, and the operation of each module is switched needs a large amount of loaded down with trivial details valve operations; 3, catalyst strength is limited, and frequent carrying is very easily broken, causes the back flue gas resistance that puts into operation big even can't move; 4, the regeneration chemical consumption is big, and the regeneration expense is high, and whole regeneration is long in time limit, can not satisfy the requirement that boiler in time puts into operation.
The utility model content
In order to overcome the deficiency that is used for the catalyst for denitrating flue gas regeneration techniques in the prior art, the purpose of the utility model provides a kind of online regenerative system of catalyst for denitrating flue gas.
The online regenerative system of the described catalyst for denitrating flue gas of the utility model comprises flue external system, the interior system of flue and is connected pipeline;
The flue external system comprises regenerating medium storage or generation part, regenerating medium heater block and regenerating medium transfer unit; System comprises the regenerating medium distribution member in the said flue; The regenerating medium distribution member is placed in the flue, can move to the top position of any catalyst module in the flue;
Regenerating medium comprises liquids and gases, and said liquid comprises cleaning fluid and/or activating solution.Said cleaning fluid and activating solution can adopt uses the regeneration of flue denitrating catalyst always with cleaning fluid or activating solution in the prior art.
The flue external system connects through being connected pipeline with the interior system of flue.
Particularly, regenerating medium storage or generation part described in the flue external system comprise liquid tank, and described regenerating medium transfer unit comprises liquid delivery pump and fluid pipeline, and described regenerating medium heater block comprises liquid heater; Described liquid tank is connected with liquid interface medium on the regenerating medium distribution member through liquid delivery pump, liquid heater.
Particularly, regenerating medium storage or generation part described in the flue external system comprise the gas generation part, and described regenerating medium transfer unit comprises gas pipeline, and described regenerating medium heater block comprises gas heater; Said gas generation part is connected with gas medium interface on the regenerating medium distribution member through gas heater.Wherein said gas generation part comprises blower fan or station-service compressed air source.
In concrete application, the regenerating medium distribution member is a distributor.Send to various regenerating mediums arbitrary zone of working face (flue inner catalyst layer) for ease; Accomplish do not need with catalyst module hang out flue can accomplish to catalyst blow operations such as ash, cleaning, activating and regenerating, distributor can be at said flue internal diameter to horizontal, axis vertical, radially vertically move freely.
Said distributor comprises top-support, bottom bracket and suspension arrangement; Bottom bracket hangs on the top-support through suspension arrangement; Bottom bracket is provided with gas nozzle and fluid injector, is connected pipeline with gas connection pipe road and liquid through gas medium interface and liquid interface medium respectively and connects; Described gas medium interface or liquid interface medium can be valve mechanisms.The top-support of said distributor is placed on the last layer structure of flue inner catalyst layer, and the last layer structure that perhaps also can adopt the flue inner catalyst layer is as top-support.The last layer structure of said here flue inner catalyst layer generally comprises the bottom steel shelf structure of last layer catalyst layer, or the bottom steel shelf structure of the superiors' rectification layer in the flue.Move the top position of arbitrary catalyst module of arbitrary catalyst layer in said suspension arrangement and bottom bracket to the flue through manual or electronic mode.
System also comprises gatherer in the flue, and gatherer can be installed in the flue bottom, sets up liquid flow path with distributor.
In order to strengthen regeneration effect, the flue external system comprises supersonic generator, and supersonic generator comprises interface A and interface B; Interface A and interface B are placed on the catalyst module; Act on catalyst module through output ultrasonic wave, regenerating medium is vibrated, to bring better treatment effect.
For preventing regenerating medium to the pollution to regenerating medium of the corrosion of flue inwall and flue impurity, system also comprises protecting film in the flue, when catalyst for denitrating flue gas is carried out online regeneration, can protecting film be fixed on the said flue inwall steel plate through magnet.Said protecting film can adopt disclosed anti-corrosion material in the prior aries such as plastics, waterproof cloth.
The online regenerative system of this catalyst for denitrating flue gas is equally applicable to the online regeneration that independent flue gas desulfurization, demercuration catalyst and combined type flue gas are handled catalyst.
Use the system of the utility model; Carry out the online mobile regeneration of catalyst for denitrating flue gas; Its step is that the regenerating medium distribution member with system in the said flue is positioned in the flue, moves it arbitrary catalyst layer and the top position of arbitrary catalyst module in the flue through manual or electronic mode; Through regulating and open and close regenerating medium storage or generation part, regenerating medium heater block and the regenerating medium transfer unit in the flue external system; Regenerating medium is transported to the regenerating medium distribution member in the flue, accomplishes the process catalyst regeneration step of blowing ash, cleaning, drying, activation that comprises catalyst for denitrating flue gas module in the flue.
Its concrete steps are following:
A blows grey step: get into flue from a certain catalyst layer manhole door said distributor is installed, gas nozzle on the distributor is connected with the gas connection pipe road through the gas medium interface, start said gas generation part, close said gas heater; Move said distributor catalyst layer is blown ash, start boiler induced-draft fan, dust is siphoned away by air-introduced machine, accomplishes and blows ash; Distributor is arranged to other each layer catalyst layers repeats above operation.All catalyst layer blows and closes said boiler induced-draft fan and gas generation part after ash finishes, and purges said flue bottom ash bucket clean.Be back to the pipeline of said liquid tank in the flue bottom said gatherer of installation and with liquid; It is subsequent use in said liquid tank, to prepare cleaning fluid.
In this step,, generally after temperature in the flue is lower than 40 ℃, installs and operate just begin to carry out each item for production safety.
Blow in the grey step, the boiler induced-draft fan aperture is suitable, can be pulled away and not influence operating personnel with dust to be operating as suitable.Be used for blowing the gas flow and the pressure of ash, adjust according to the flue scale, be advisable can blow clean dust, the flow of preferred adjustments of gas is 1～500m
3/ h, pressure are 0.1～1.0Mpa.
B cleaning step: get into said flue, said protecting film is fixed on the said flue inwall steel plate through magnet; Unload the gas connection pipe that is connected on the said distributor; The liquid tube connector is connected on the liquid interface medium of said distributor and is communicated with fluid injector; Start said liquid delivery pump input cleaning fluid; Self-loopa door through regulating liquid delivery pump is regulated fluid flow, and starting said liquid heater, to make fluid temperature be 0～70 ℃, moves said distributor catalyst layer is cleaned; Cleaning fluid pours into and freely falls the said flue bottom collector from the catalyst module of catalyst layer, returns said liquid tank through pipeline, accomplishes and cleans; Distributor is arranged to other each layer catalyst layers repeats above operation; All catalyst layer is closed said liquid delivery pump and liquid heater after cleaning and finishing.
In the cleaning step; The aperture of self-loopa door through the adjustment liquid delivery pump; Guarantee to get into the cleaning fluid flow that cleans regional inner catalyst layer, the catalyst layer upper surface is submerged, and keep groundwater increment and its free-falling amount balance; Thereby realize the catalyst layer of handling on volume, be full of liquid fully; And have certain flow velocity, cleaning fluid is freely fallen the flue bottom collector from the bottom of catalyst module and is got back to the liquid tank through pipeline, accomplishes and cleans the indifference dynamic circulation cleaning on thickness of regional inner catalyst layer.After cleaning was accomplished in a cleaning zone, distributor moved to next cleaning zone and cleans.After the cleaning of whole layer catalyst layer finished, distributor moved to down the operation of one deck catalyst layer repeated washing.Generally look conditions such as catalyst layer thickness and scale, the flow and the pressure of adjustment cleaning fluid.Preferred cleaning fluid flow is 1～300m
3/ h, pressure are 0.1～0.5Mpa.
Can add soup at any time when concentration of lotion descends in the cleaning process.
C drying steps: get into said flue, open the local protecting film in said boiler induced-draft fan floss hole place, unload the liquid tube connector that is connected on the said distributor, gas connection pipe is connected on the gas medium interface of said distributor; Start said boiler induced-draft fan; Start said gas generation part, start said gas heater simultaneously, make that gas temperature is 1～100 ℃; Move said distributor said catalyst layer is carried out drying; Distributor is arranged to other each layer catalyst layers repeats above operation; All catalyst layers are dry closes said boiler induced-draft fan, gas generation part and gas heater after finishing, the cleaning fluid in said liquid tank of emptying and the pipeline, and it is subsequent use in said liquid tank, to prepare activating solution.
In the drying steps, the boiler induced-draft fan aperture is suitable, can be pulled away and does not influence operating personnel operation and fastness that can the tamper protection layer is advisable with humid air.Be used for dry gas flow and pressure, adjust according to the flue scale, be advisable with catalyst module that can the substantially dry catalyst layer, the flow of preferred adjustments of gas is 1～500m
3/ h, pressure are 0.1～1.0Mpa.
D activation step: get into said flue, recover the local protecting film in said boiler induced-draft fan floss hole place; Unload the gas connection pipe that is connected on the said distributor, said liquid tube connector is connected on the liquid interface medium of said distributor, start said liquid delivery pump input activating solution, regulate the self-loopa gate control fluid flow of said liquid delivery pump; Start said liquid heater and make that the activating solution temperature is 1～70 ℃ of degree, move said distributor catalyst layer is carried out activation; Activating solution pours into and freely falls said flue bottom collector from the catalyst module of said catalyst layer and gets back to the said liquid tank through pipeline, accomplishes activation; Distributor is arranged to other each layer catalyst layers repeats above operation; All the catalyst layer activation is closed said liquid delivery pump and liquid heater after finishing.
In the activation step; The aperture of self-loopa door through the adjustment liquid delivery pump; Guarantee to get into the activating solution flow of activating area inner catalyst layer, the catalyst layer upper surface is submerged, and keep groundwater increment and its free-falling amount balance; Thereby realize the catalyst layer of handling on volume, be full of liquid fully; And have certain flow velocity, activating solution is freely fallen the flue bottom collector from the bottom of catalyst module and is got back to the liquid tank through pipeline, accomplishes and cleans the indifference dynamic circulation activation on thickness of regional inner catalyst layer.After an activating area was accomplished activation, distributor moved to next activating area and carries out activation.After the activation of whole layer catalyst layer finished, distributor moved to down the operation of one deck catalyst layer repetition of activation.Generally look conditions such as catalyst layer thickness and scale, the flow and the pressure of adjustment activating solution.Preferred activating solution flow is 1～300m
3/ h, pressure are 0.1～0.5Mpa.
Can add soup at any time when activation solution concentration descends in the activation process.
E is drying steps again: get into said flue, remove the inner whole protecting films of said flue, remove said distributor and gatherer; Close all said manhole doors; Before ignition of the boiler puts into operation, start boiler fan and air-introduced machine oepration at full load, it is air-dry that catalyst layer is carried out normal temperature air; After ignition of the boiler, use flue gas drying.
In the dry run, ignition of the boiler puts into operation the preceding air-dry time of the normal temperature air to catalyst, is determined on a case-by-case basis, and generally gets final product at 1～5 hour again.
Flue gas drying after the ignition of the boiler, the cigarette temperature that needs control to get into catalyst layer, the programming rate in the unit interval can not be too fast, in order to avoid catalyst module is caused the too fast and impaired situation that heats up.So flue-gas temperatures are no less than 30 minutes from the time of normal temperature to 120 ℃ in the preferred flue 10, and keep 30～60 minutes at 120 ℃, be no less than 60 minutes from 120～300 ℃ times.
In addition; In order to strengthen in the online regenerative process of catalyst, the treatment effect of each step blows in ash, cleaning, drying, the activation step above-described; All or optionally start supersonic generator; The ultrasonic wave of its output acts on catalyst module, and regenerating medium is vibrated, to strengthen regeneration effect.
The beneficial effect of the utility model is: 1, the workload of the frequent carrying of catalyst module and the damage that catalyst causes because of carrying have thoroughly been exempted in online regeneration; 2, utilize flue, catalyst module self structure characteristics and utilize movably distributor to carry out step for regeneration, all the step for regeneration of catalyst layers can disposablely be accomplished; 3, regenerating medium consumption is little, and the regeneration expense is low; 4, regeneration duration weak point has improved operating efficiency.
Description of drawings
Fig. 1 is the schematic flow sheet of the online regenerative system of catalyst for denitrating flue gas;
Fig. 2 is the sketch map toward catalyst module perfusion fluid medium;
Fig. 3 is the dispensing arrangement sketch map.
Detailed description of main elements:
The 1-liquid tank; The 1-1-floss hole; The 1-2-water supplement port; 1-3-tonic liquid mouth; The 2-liquid delivery pump; The 3-blower fan; The 4-gas heater; The 5-liquid heater; The 6-supersonic generator; The 7-distributor; The 8-gatherer; The 9-protecting film; The 10-flue; The 11-catalyst layer; 12-station-service compressed air source; The 13-boiler induced-draft fan; 14-self-loopa door;
The 7-1-top-support; The 7-2-suspension arrangement; The 7-3-bottom bracket; 7-4-gas medium interface (gas valve); 7-5-liquid interface medium (Liquid valve); The 7-6-gas nozzle; The 7-7-fluid injector.
More than each width of cloth accompanying drawing will specifically combine the following specific embodiment to specify.
The specific embodiment
As shown in Figure 1, the online regenerative system of a kind of catalyst for denitrating flue gas comprises flue external system, the interior system of flue and is connected pipeline; The flue external system connects through being connected pipeline with the interior system of flue.
Wherein system comprises distributor 7, gatherer 8, protecting film 9 in the flue.
Said gatherer 8 is installed in flue 10 bottoms, sets up liquid flow path with distributor 7, and through pipeline liquid medium is back in the liquid tank 1.
When catalyst for denitrating flue gas is carried out online regeneration, through magnet said protecting film 9 is fixed on the said flue 10 inwall steel plates, play the effect that prevents that regenerating medium from polluting regenerating medium the corrosion of flue inwall and flue impurity.Protecting film 9 is a Polypropylence Sheet.
The flue external system comprises liquid tank 1 and liquid delivery pump 2, and system comprises distributor 7, gatherer 8 in the flue.Liquid heater 5 is arranged on being connected in the pipeline of liquid delivery pump 2 and distributor 7.Said flue external system also comprises supersonic generator 6, and the ultrasonic wave of the interface A of supersonic generator 6 and interface B output acts on catalyst module, and regenerating medium is vibrated, and strengthens regeneration effect.
Said flue external system comprises liquid tank 1, liquid delivery pump 2, liquid heater 5; Described liquid tank 1 is connected with liquid interface medium 7-5 on the distributor 7 through liquid delivery pump 2, liquid heater 5.
Said flue external system also comprises gas generation part, gas heater 4; Said gas generation part is connected with gas medium interface 7-4 on the distributor 7 through gas heater 4; Wherein the gas generation part is blower fan 3 or station-service compressed air source 12, and both can switch through valve.
As shown in Figure 3, said distributor 7 comprises top-support 7-1, bottom bracket 7-3 and suspension arrangement 7-2; Said bottom bracket 7-3 hangs on the top-support 7-1 through suspension arrangement 7-2; Bottom bracket 7-3 is provided with gas nozzle 7-6 and fluid injector 7-7, is connected pipeline with gas connection pipe road and liquid through gas medium interface 7-4 and liquid interface medium 7-5 respectively and connects.Said top-support 7-1 is placed on the last layer structure of flue 10 inner catalyst layers; Or the last layer structure that adopts flue 10 inner catalyst layers is as top-support 7-1, moves said suspension arrangement 7-2 and said bottom bracket 7-3 arbitrary catalyst layer and the top position of arbitrary catalyst module to the flue 10 through manual or electronic mode.
Said flue external system also comprises supersonic generator 6; Supersonic generator 6 comprises interface A and interface B; Interface A and interface B are placed on the catalyst module of flue inner catalyst layer; Act on catalyst module through output ultrasonic wave, regenerating medium is vibrated, to bring better treatment effect.
According to the system of Fig. 1, carry out the online mobile regeneration of catalyst for denitrating flue gas, applied flue, 25 meters of its superiors' catalyst layer height above sea levels.Its step is following:
A blows grey step: after temperature is lower than 40 degree in the flue, gets into flue 10 from a certain catalyst layer manhole door said distributor 7 is installed, gas nozzle 7-6 on the distributor 7 is connected with the gas connection pipe road through gas medium interface 7-4.Start blower fan 3 or station-service compressed air source 12, make that the flow of gas is 100m
3/ h, pressure are 0.2Mpa; Close gas heater 4 simultaneously, open supersonic generator 6; Move 7 pairs of catalyst layers of said distributor and blow ash; Air blows downwards through the catalyst layer upper surface, and after the catalyst body of flowing through, the air that contains dust is siphoned away by air-introduced machine from the bottom, accomplishes and blows ash process; Dust is siphoned away by boiler induced-draft fan 13, and the boiler induced-draft fan aperture is suitable, can be pulled away and not influence operating personnel with dust to be operating as suitable.After completion one deck catalyst layer blows ash, distributor 7 is arranged to other each layer catalyst layers repeats above operation.All catalyst layers blow and close said boiler induced-draft fan 13, supersonic generator 6 and blower fan 3 or station-service compressed air source 12 after ash finishes, and purge said flue bottom ash bucket clean.Be back to the pipeline of said liquid tank 1 in the flue bottom said gatherer 8 of installation and with liquid.It is subsequent use in said liquid tank 1, to prepare cleaning fluid.
B cleaning step: get into said flue 10, protecting film 9 is fixed on the said flue 10 inwall steel plates through magnet; Unload the gas connection pipe that is connected on the said distributor 7; The liquid interface medium 7-5 that the liquid tube connector is connected on said distributor 7 upward is communicated with fluid injector 7-7; Start said liquid delivery pump 2 input cleaning fluids; Self-loopa door 14 through regulating liquid delivery pump 2 is regulated fluid flow, makes that the cleaning fluid flow is 200m
3/ h, pressure is 0.3Mpa, starting said liquid heater 5, to make fluid temperature be 50 ℃, moves 7 pairs of catalyst layers of said distributor and clean; Cleaning fluid pours into and freely falls the said flue bottom collector 8 from the catalyst module of catalyst layer, returns said liquid tank 1 through pipeline; After accomplishing the cleaning of one deck catalyst layer, distributor 7 is arranged to other each layer catalyst layers repeats above operation; Close said liquid delivery pump 2, liquid heater 5, supersonic generator 6 after all catalyst layers clean and finish.
C drying steps: get into said flue 10, open the local protecting film 9 in said boiler induced-draft fan 13 floss hole places, unload the liquid tube connector that is connected on the said distributor 7, gas connection pipe is connected on the gas medium interface 7-4 of said distributor 7; Start said boiler induced-draft fan 13 and suitably draw phoenix, can be pulled away and do not influence operating personnel operation and fastness that can the tamper protection layer is advisable with humid air; Start blower fan 3 or station-service compressed air source 12, the flow of gas is 100m
3/ h, pressure are 0.2Mpa; Start gas heater 4 simultaneously, make that gas temperature is 100 ℃; Move 7 pairs of said catalyst layers of said distributor and carry out drying; After one deck catalyst layer drying finishes, distributor 7 is arranged to other each layer catalyst layers repeats above operation; All catalyst layers are dry closes said boiler induced-draft fan 13, blower fan 3 or station-service compressed air source 12, gas heater 4, supersonic generator 6 after finishing; Cleaning fluid in the said liquid tank of emptying 1 and the pipeline, it is subsequent use in said liquid tank 1, to prepare activating solution.
D activation step: get into said flue 10, recover the local protecting film in said boiler induced-draft fan 13 floss hole places; Unload the gas connection pipe that is connected on the said distributor 7; Said liquid tube connector is connected on the liquid interface medium 7-5 of said distributor 7; Start said liquid delivery pump 2 input activating solutions, the self-loopa door 14 control fluid floies of regulating said liquid delivery pump 2 are 200m
3/ h, pressure are 0.3Mpa (25 meters of the superiors' catalyst layer height above sea levels); Start said liquid heater 5 and make that the activating solution temperature is 60 ℃ of degree, start supersonic generator 6; Move 7 pairs of catalyst layers of said distributor and carry out activation; Activating solution pours into and freely falls said flue bottom collector 8 from the catalyst module of said catalyst layer 11 and gets back to the said liquid tank 1 through pipeline, accomplishes activation; Treat that the activation of one deck catalyst layer finishes, distributor 7 is arranged to other each layer catalyst layers repeats above operation; Close said liquid delivery pump 2, liquid heater 4 and supersonic generator 6 after all the catalyst layer activation finish.
E is drying steps again: get into said flue 10, remove whole protecting films 9, the said distributor 7 of dismounting and the gatherer 8 of said flue 10 inside; Close all said manhole doors; Before ignition of the boiler puts into operation, start boiler fan and air-introduced machine oepration at full load 2 hours, it is air-dry that catalyst layer is carried out normal temperature air; After ignition of the boiler, use flue gas drying: flue-gas temperature and kept 60 minutes at 120 ℃ from the 30 minutes time of normal temperature to 120 ℃ in the flue 10, from 120 ℃ of 60 minutes times that are raised to 300 ℃.
In the process of the online regeneration of above catalyst, when regenerating medium is liquid medium, as shown in Figure 2 to the filling process of catalyst module:
Cleaning fluid, activating solution pump into distributor 7 by delivery pump 2 from liquid tank 1, distributor 7 can move freely in flue 10, and liquid is through the liquid interface medium 7-5 of fluid pipeline to the distributor 7; Arrive fluid injector 7-7; Liquid is transported to catalyst layer, pours into downwards, after the area of passage zone catalyst body of flowing through by upper surface; Freely fall the flue bottom collector 8 from the catalyst module bottom, get back in the liquid tank 1 through pipeline again.Through regulating the supply of delivery pump 2; Catalyst layer 11 surfaces in area of passage zone are submerged; And keep groundwater increment and its free-falling amount balance; Thereby the catalyst layer 11 of realizing the area of passage zone is full of liquid fully on volume, accomplishes catalyst layer 11 indifference dynamic circulation on thickness and cleans and activation.Flow rate of liquid is controlled at 0.1～0.5m/s, then can stop 5～30 minutes in the area of passage zone, accomplish the cleaning or activation of area of passage zone inner catalyst module after, distributor 7 moves to next regional catalyst module and repeats above operation.
The above cleaning fluid and activating solution are through commercially available and get.
Carry out the online regeneration of flue denitrating catalyst according to the utility model specific embodiment, thoroughly exempted the workload of the frequent carrying of catalyst module and the damage that catalyst causes because of carrying; Utilize flue, catalyst module self structure characteristics and utilize movably distributor execution step for regeneration, all the step for regeneration of catalyst layers can disposablely be accomplished; Regenerating medium consumes little, and the regeneration expense is low; The regeneration duration is short, has improved operating efficiency.
Claims (7)
1. the online regenerative system of a catalyst for denitrating flue gas is characterized in that:
Comprise flue external system, the interior system of flue and be connected pipeline;
Said flue external system comprises regenerating medium storage or generation part, regenerating medium heater block and regenerating medium transfer unit; System comprises the regenerating medium distribution member in the said flue; The regenerating medium distribution member is placed in the flue, can move to the top position of any catalyst module in the flue;
Said regenerating medium comprises liquids and gases, and said liquid comprises cleaning fluid and/or activating solution;
Said flue external system connects through being connected pipeline with the interior system of flue.
2. according to the online regenerative system of the said catalyst for denitrating flue gas of claim 1, it is characterized in that:
Said flue external system comprises liquid tank (1), liquid delivery pump (2), liquid heater (5); Described liquid tank (1) is connected with liquid interface medium on the regenerating medium distribution member through liquid delivery pump (2), liquid heater (5).
3. according to the online regenerative system of the said catalyst for denitrating flue gas of claim 1, it is characterized in that:
Said flue external system comprises gas generation part, gas heater (4); Said gas generation part is connected with gas medium interface on the regenerating medium distribution member through gas heater (4); Wherein the gas generation part is blower fan (3) or station-service compressed air source (12).
4. according to the online regenerative system of claim 2 or 3 said catalyst for denitrating flue gas, it is characterized in that:
Said regenerating medium distribution member is distributor (7), and said distributor (7) comprises top-support (7-1), bottom bracket (7-3) and suspension arrangement (7-2); Said bottom bracket (7-3) hangs on the top-support (7-1) through suspension arrangement (7-2); Bottom bracket (7-3) is provided with gas nozzle (7-6) and fluid injector (7-7), is connected pipeline with gas connection pipe road and liquid through gas medium interface and liquid interface medium respectively and connects; Said top-support (7-1) is placed on the last layer structure of flue (10) inner catalyst layer; Or the last layer structure that adopts flue (10) inner catalyst layer is as top-support (7-1), moves the interior arbitrary catalyst layer of said suspension arrangement (7-2) and said bottom bracket (7-3) to flue (10) and the top position of arbitrary catalyst module through manual or electronic mode.
5. according to the online regenerative system of the said catalyst for denitrating flue gas of claim 4, it is characterized in that:
System comprises gatherer (8) in the said flue, and said gatherer (8) is installed in flue (10) bottom, sets up liquid flow path with distributor (7).
6. according to the online regenerative system of the said catalyst for denitrating flue gas of claim 4, it is characterized in that:
Said flue external system comprises supersonic generator (6), and said supersonic generator (6) comprises interface A and interface B, and said interface A and interface B are placed on the catalyst module.
7. according to the online regenerative system of the said catalyst for denitrating flue gas of claim 4, it is characterized in that:
System comprises protecting film (9) in the said flue, and when catalyst for denitrating flue gas was carried out online regeneration, said protecting film (9) was fixed on said flue (10) the inwall steel plate through magnet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011204913148U CN202315908U (en) | 2011-11-30 | 2011-11-30 | Online regeneration system for flue gas denitrification catalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204913148U CN202315908U (en) | 2011-11-30 | 2011-11-30 | Online regeneration system for flue gas denitrification catalyst |
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| CN202315908U true CN202315908U (en) | 2012-07-11 |
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| CN103055962A (en) * | 2012-12-25 | 2013-04-24 | 国电新能源技术研究院 | Method and equipment for selective catalystic reduction (SCR) denitration catalyst reactivation |
| CN103127963A (en) * | 2011-11-30 | 2013-06-05 | 徐树元 | On-line regeneration system and method of flue gas denitration catalyst |
| CN103127823A (en) * | 2013-02-22 | 2013-06-05 | 邹炎 | Modular flue gas cleaning device with in-situ regeneration function, and regeneration method |
| CN104148122A (en) * | 2012-12-25 | 2014-11-19 | 国电新能源技术研究院 | Regeneration equipment for SCR denitration catalyst |
| 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 |
| CN106492887A (en) * | 2016-10-28 | 2017-03-15 | 浙江大学 | A kind of method of the online activity recovery of SCR denitration |
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- 2011-11-30 CN CN2011204913148U patent/CN202315908U/en not_active Expired - Lifetime
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| CN103127963A (en) * | 2011-11-30 | 2013-06-05 | 徐树元 | On-line regeneration system and method of flue gas denitration catalyst |
| CN103127963B (en) * | 2011-11-30 | 2015-05-20 | 徐树元 | On-line regeneration system and method of flue gas denitration catalyst |
| CN103055962A (en) * | 2012-12-25 | 2013-04-24 | 国电新能源技术研究院 | Method and equipment for selective catalystic reduction (SCR) denitration catalyst reactivation |
| CN103055962B (en) * | 2012-12-25 | 2014-08-13 | 国电新能源技术研究院 | Selective catalystic reduction (SCR) denitration catalyst reactivation method |
| CN104148122A (en) * | 2012-12-25 | 2014-11-19 | 国电新能源技术研究院 | Regeneration equipment for SCR denitration catalyst |
| CN103127823A (en) * | 2013-02-22 | 2013-06-05 | 邹炎 | Modular flue gas cleaning device with in-situ regeneration function, and regeneration method |
| 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 |
| CN106492887A (en) * | 2016-10-28 | 2017-03-15 | 浙江大学 | A kind of method of the online activity recovery of SCR denitration |
| CN109647133A (en) * | 2019-01-23 | 2019-04-19 | 南京理工大学 | Sorbent injection mercury removal device in a kind of coal-fired flue-gas |
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