CN202516560U - On-line cleaning and regeneration device for catalyst - Google Patents
On-line cleaning and regeneration device for catalyst Download PDFInfo
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- CN202516560U CN202516560U CN2012200186670U CN201220018667U CN202516560U CN 202516560 U CN202516560 U CN 202516560U CN 2012200186670 U CN2012200186670 U CN 2012200186670U CN 201220018667 U CN201220018667 U CN 201220018667U CN 202516560 U CN202516560 U CN 202516560U
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Abstract
The utility model discloses an on-line cleaning and regeneration device for a catalyst. The on-line cleaning and regeneration device for the catalyst comprises a liquid dispensing device, a liquid recovering device, a cleaning liquid supply device and an active replenishing liquid supply device, wherein the liquid dispensing device is arranged at the upper end of a selective catalytic reduction (SCR) catalyst; the liquid recovering device is arranged at the lower end of the SCR catalyst; and the cleaning liquid supply device and the active replenishing liquid supply device are communicated with the liquid dispensing device. The on-line cleaning and regeneration device has a reasonable structure, and is convenient to mount and dismount; the catalyst is cleaned and regenerated under the condition that a flue gas denitration catalyst is not removed out of a gas flue, so that the activity of the catalyst is recovered; and therefore, the service life of the catalyst is prolonged, and the use cost of SCR catalyst users is effectively saved.
Description
Technical field
The utility model relates to catalyst technical field, is specifically related to a kind of catalyst on-line cleaning and regenerating unit.
Background technology
AND ENERGY RESOURCES CONSUMPTION IN CHINA is main with coal, in the past nearly 30 years, and the ratio of coal in the AND ENERGY RESOURCES CONSUMPTION IN CHINA structure surpasses 70%, estimates that according to the expert to the year two thousand fifty, the ratio of coal in energy resource structure can not be lower than 50%.The utilization of coal is mainly used in combustion power generation, in its combustion process, will produce a large amount of pernicious gases, oxysulfide (SO
X), nitrogen oxide (N0
X) organic contamination, heavy metal and fine particle etc.According to statistics, the discharge capacity of national nitrogen oxide in 2000 expects the year two thousand thirty up to 1,170 ten thousand tons, and China's nitrogen oxide emission will reach 3,540 ten thousand tons.A large amount of nitrogen oxide not only impels NO in the atmosphere
2Concentration raises, the formation that also can produce photochemical fog and fine particle, heavy damage atmospheric ozone layer, infringement health.The NO of coal-burning power plant
XDischarging accounts for NO
XTherefore more than 70% of total discharging reduces station boiler NO
XDischarging is present urgent problem.
The nitrogen oxide control technology is divided into Combustion Process Control technology and gas denitrifying technology two big classes.The Combustion Process Control technology mainly is the generation that control stove combustion process reduces nitrogen oxide.SCR (SCR) is that application is the most extensive in the present gas denitrifying technology, and technology is the most ripe, the technology that denitration efficiency is the highest.Catalyst is the core of SCR technology, and its performance directly influences the denitration efficiency of whole denitrification process.At present the widest of catalyst applications is honeycomb type V
2O
5-WO
3/ TiO
2The type catalyst.Catalyst is (coal fired power plant SCR life of catalyst was generally 2～3 years at present) in use for some time, and the micropore that can take place in various degree stops up and phenomenons such as passage obstruction, catalyst poisoning, causes catalyst activity reduction even inactivation.SCR Preparation of Catalyst expense is very high, and the replacement decaying catalyst costs dearly, therefore; SCR catalyst through even inactivation very low to denitration efficiency cleans and regenerates, and makes its activity return to the fresh catalyst level basically, then can save fund greatly; According to estimates; A typical 600MW unit through SCR catalyst cleaning and regeneration technology, can be saved about 3,000,000 yuan every year.
At present; In the research for the cleaning of SCR catalyst and regeneration techniques; Mainly be off-line cleaning and regeneration to catalyst; Its technological process is roughly carries out the ultrasonic waves for cleaning of acidic cleaning solution, the active liquid dipping that replenishes successively to the catalyst of activity decline even inactivation, and processes such as drying improve the denitration efficiency of catalyst.These technologies all need shift out exhaust gases passes with catalyst, and are consuming time longer, and in dismounting, carrying and the installation process of catalyst, cause the damage of catalyst easily, and cleaning and the regeneration of accomplishing catalyst need long blowing out, and cost is higher.
The utility model content
In order to overcome the shortcoming that above-mentioned prior art exists, the purpose of the utility model is to provide a kind of catalyst on-line cleaning and regenerating unit, has rational in infrastructure; Installation and removal are convenient; Catalyst for denitrating flue gas is not being shifted out under the situation of flue, catalyst is cleaned and regenerates, activity of such catalysts is restored; Prolong the service life of catalyst, effectively saved catalyst user's use cost.
To achieve these goals, the utility model adopts following technical scheme:
A kind of catalyst on-line cleaning and regenerating unit comprise the liquid dispensing apparatus that is installed in SCR catalyst upper end, the liquid withdrawal system that is installed in SCR catalyst lower end and and liquid dispensing apparatus the cleaning fluid feeding mechanism and the active liquid supply unit that replenishes that are connected.
Said cleaning fluid feeding mechanism comprises the cleaning fluid conveying pipeline 3 that cleaning fluid liquid reserve tank 1 and cleaning fluid liquid reserve tank 1 are connected and is arranged on the cleaning fluid conveying pipeline 3 the first delivery pump 2-1 near cleaning fluid liquid reserve tank 1.
The first pressure-regulating valve 4-1 is installed on the said cleaning fluid conveying pipeline 3.
The cleaning fluid that places cleaning fluid liquid reserve tank 1 is H
2SO
4With the mixed liquor of emulsifying agent S-185, wherein H
2SO
4Concentration is 0.2～0.8mol/L, and the concentration of emulsifying agent S-185 is 0.05～1wt%, in the mixed liquor, and water: H
2SO
4: the ratio of the quality of S-185 is 16: 1: 1.
Said activity is replenished liquid supply unit and is comprised that the active liquid liquid reserve tank 6 and active of replenishing replenishes activity that liquid liquid reserve tank 6 is connected and replenishes liquid carrier pipe 7 and be arranged on the active second delivery pump 2-2 that replenishes liquid liquid reserve tank 6 near activity that replenishes on the liquid carrier pipe 7.
Said activity is replenished on the liquid carrier pipe 7 the second pressure-regulating valve 4-2 is installed.
Placing active activity of replenishing liquid liquid reserve tank 6 to replenish liquid is the mixed liquor of ammonium metavanadate, ammonium metatungstate, penetration enhancer and surfactant; Can recycle; In the mixed liquor, water: ammonium metavanadate: ammonium metatungstate: penetration enhancer: the ratio of the quality of surfactant is 100: 1: 5: 1: 1.
Said liquid dispensing apparatus comprises static housing 8; Be arranged on the current-sharing pipe 5 of static housing 8 tops; Be arranged on current-sharing pipe 5 belows, go up in the static housing 8 and and a plurality of separating liquid pipelines 9 of being connected of current-sharing pipe 5; Said each separating liquid pipeline 9 below are provided with a plurality of shower nozzles 10 that linearly are evenly arranged on the separating liquid pipeline 9, and said current-sharing pipe 5 is connected with cleaning fluid conveying pipeline 3 and the active liquid carrier pipe 7 that replenishes.
Said liquid withdrawal system comprises static housing 11 down; Be arranged on down the recovery bucket 12 of static housing 11 belows; Be arranged on the liquids recovery pipeline 14 that reclaims bucket 12 belows and be connected with recovery bucket 12; Be arranged on the recovery pond 15 of liquids recovery pipeline 14 other ends, and to following static housing 11 and recovery bucket 12 passive movable support frames 13.
Said movable support frame 13 can be regulated its height through bracing frame adjusting device 16, and bracing frame adjusting device 16 is for screwing valve.
The utility model has the advantages that: the off-line with respect to catalyst cleans and regeneration technology; The utility model need not catalyst is shifted out under the situation of flue; Just can the catalyst of activity decline even inactivation be cleaned and regenerate, recover its activity, need not to carry out the dismounting and the installation of catalyst; Effectively saved the labour, shortened and cleaned and regenerate the needed time.And the utility model is easy to operate, and efficient is high, has prolonged the service life of catalyst, has effectively saved SCR catalyst user's use cost.
Description of drawings
Fig. 1 is the front view of the utility model.
Fig. 2 is the vertical view of the utility model.
Fig. 3 is the right cutaway view of the utility model.
Fig. 4 is the utility model separating liquid pipeline sketch map.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done more detailed explanation.
Like Fig. 1, shown in Figure 2; A kind of catalyst on-line cleaning of the utility model and regenerating unit comprise the liquid dispensing apparatus that is installed in SCR catalyst upper end, the liquid withdrawal system that is installed in SCR catalyst lower end and and liquid dispensing apparatus the cleaning fluid feeding mechanism and the active liquid supply unit that replenishes that are connected.Said cleaning fluid feeding mechanism comprises the cleaning fluid conveying pipeline 3 that cleaning fluid liquid reserve tank 1 and cleaning fluid liquid reserve tank 1 are connected and is arranged on the cleaning fluid conveying pipeline 3 near the first delivery pump 2-1 of cleaning fluid liquid reserve tank 1, the first pressure-regulating valve 4-1 is installed on the cleaning fluid conveying pipeline 3; Said activity is replenished liquid supply unit and is comprised that the active liquid liquid reserve tank 6 and active of replenishing replenishes activity that liquid liquid reserve tank 6 is connected and replenishes liquid carrier pipe 7 and be arranged on the active second delivery pump 2-2 that replenishes liquid liquid reserve tank 6 near activity that replenishes on the liquid carrier pipe 7, and active replenishing on the liquid carrier pipe 7 is equipped with the second pressure-regulating valve 4-2; Cleaning fluid conveying pipeline 3 and the active current-sharing pipe 5 that replenishes liquid liquid reserve tank 6 and liquid dispensing apparatus are connected.Said liquid withdrawal system comprises static housing 11 down; Be arranged on down the recovery bucket 12 of static housing 11 belows, be arranged on the liquids recovery pipeline 14 that reclaims bucket 12 belows and be connected with recovery bucket 12; Be arranged on the recovery pond 15 of liquids recovery pipeline 14 other ends; To following static housing 11 and recovery bucket 12 passive movable support frames 13, and movable support frame arrangement for adjusting height 16, bracing frame adjusting device 16 is preferably screws valve.
As shown in Figure 3, liquid dispensing apparatus comprises static housing 8, is arranged on the current-sharing pipe 5 of static housing 8 tops; Be arranged on current-sharing pipe 5 belows, go up in the static housing 8 and and a plurality of separating liquid pipelines 9 of being connected of current-sharing pipe 5; Said each separating liquid pipeline 9 below are provided with a plurality of shower nozzles 10, mainly are through shower nozzle 10, and cleaning fluid or activity are replenished liquid under preset pressure; Speed with preset sprays into catalyst uniformly, and catalyst is cleaned and regenerates.
As shown in Figure 4, a plurality of shower nozzles 10 linearly are arranged on the separating liquid pipeline 9 uniformly.
The operation principle of the utility model is: at first will go up static housing 8 and be installed on the catalyst elements with following static housing 11 positions as shown in Figure 1; Wherein go up static housing 8 and cover catalyst top, casing frame and catalyst bracing frame frame can but be not limited to and adopt clamping plate to fix.Following static housing 11 is fixed on the catalyst lower end through the arrangement for adjusting height 16 of movable support frame 13 and movable support frame 13, active bracing frame height adjusting valve can but be not limited to adopt and screw valve.Open the first pressure-regulating valve 4-1 and the first delivery pump 2-1 on the cleaning fluid conveying pipeline road 3; With the cleaning fluid of cleaning fluid liquid reserve tank 1 through cleaning fluid conveying pipeline 3, current-sharing pipe 5; Arrive at last in the separating liquid pipeline 9, regulate the first pressure-regulating valve 4-1 on the cleaning fluid conveying pipeline road 3, make cleaning fluid under the pressure that the shower nozzle on the separating liquid pipeline 9 10 is being preset; Initial velocity to be higher than 5m/s sprays into catalyst, and catalyst is cleaned.Cleaning fluid is H
2SO
4Emulsifying agent S-185 mixed liquor, wherein H
2SO
4Concentration is 0.2～0.8mol/L, and the concentration of emulsifying agent S-185 is 0.05～1wt%.In the composition of cleaning fluid, water: H
2SO
4: the ratio of the quality of S-185 is 16: 1: 1.Cleaning fluid flows through catalyst under inertia and gravity effect, wash away and chemical action through physics, removes the impurity in the catalyst duct.Last cleaning fluid is reclaimed and handles by liquid withdrawal system in the catalyst bottom.The cleaning fluid scavenging period is 10～60min.
The SCR catalyst for improving its activity, also needs catalyst is carried out activation recovering after cleaning.At this moment; Open the active second pressure-regulating valve 4-2 and the second delivery pump 2-2 that replenishes on the liquid carrier pipe 7; The activity that activity is replenished in the liquid liquid reserve tank 6 is replenished liquid through the additional liquid carrier pipe 7 of activity, current-sharing pipe 5; Arrive at last in the separating liquid pipeline 9, the active second pressure-regulating valve 4-2 that replenishes on the liquid conveyance conduit 7 of adjusting simultaneously makes the active liquid that replenishes under the pressure that the shower nozzle on the separating liquid pipeline 9 10 is being preset; Initial velocity to be lower than 0.5m/s sprays into catalyst, makes the active liquid that replenishes slowly flow through catalyst.Active additional liquid is the mixed liquor of ammonium metavanadate, ammonium metatungstate, penetration enhancer and surfactant.In the composition of regenerated liquid, water: ammonium metavanadate: ammonium metatungstate: penetration enhancer: the ratio of the quality of surfactant is 100: 1: 5: 1: 1.After active additional flow is crossed catalyst, reclaimed, can be recycled after treatment by liquid withdrawal system.The recovery time of catalyst is 20～60min.
Catalyst after said method cleans and regenerates, its denitration efficiency obviously improves, and reaches instructions for use, can continue to come into operation.And at the use initial stage, under the desiccation of boiler hot flue gas, its active further raising, it is active more than 95% to arrive fresh catalyst.
Claims (8)
1. catalyst on-line cleaning and regenerating unit is characterized in that: comprise the liquid dispensing apparatus that is installed in SCR catalyst upper end, the liquid withdrawal system that is installed in SCR catalyst lower end and and liquid dispensing apparatus the cleaning fluid feeding mechanism and the active liquid supply unit that replenishes that are connected.
2. device according to claim 1 is characterized in that: said cleaning fluid feeding mechanism comprises the cleaning fluid conveying pipeline (3) that cleaning fluid liquid reserve tank (1) and cleaning fluid liquid reserve tank (1) are connected and is arranged on cleaning fluid conveying pipeline (3) goes up first delivery pump (2-1) near cleaning fluid liquid reserve tank (1).
3. device according to claim 2 is characterized in that: first pressure-regulating valve (4-1) is installed on the said cleaning fluid conveying pipeline (3).
4. device according to claim 1 is characterized in that: the additional liquid supply unit of said activity comprises the additional liquid carrier pipe (7) of activity that active additional liquid liquid reserve tank (6) and active additional liquid liquid reserve tank (6) are connected and is arranged on active additional liquid carrier pipe (7) goes up second delivery pump (2-2) near the additional liquid liquid reserve tank (6) of activity.
5. device according to claim 4 is characterized in that: said activity is replenished on the liquid carrier pipe (7) second pressure-regulating valve (4-2) is installed.
6. device according to claim 1; It is characterized in that: said liquid dispensing apparatus comprises static housing (8); Be arranged on the current-sharing pipe (5) of static housing (8) top; The a plurality of separating liquid pipelines (9) that are arranged on current-sharing pipe (5) below, go up in the static housing (8) and be connected with current-sharing pipe (5); Said each separating liquid pipeline (9) below is provided with a plurality of shower nozzles (10) that linearly are evenly arranged on the separating liquid pipeline (9), and said current-sharing pipe (5) and cleaning fluid conveying pipeline (3) and the active liquid carrier pipe (7) that replenishes are connected.
7. want 1 described device according to right; It is characterized in that: said liquid withdrawal system comprises static housing (11) down; Be arranged on down the recovery bucket (12) of static housing (11) below; Be arranged on reclaim bucket (12) below and with reclaim the liquids recovery pipeline (14) that bucket (12) is connected, be arranged on the recovery pond (15) of liquids recovery pipeline (14) other end, and to static housing (11) down with reclaim (12) the passive movable support frame (13) that struggles against.
8. want 7 described devices according to right, it is characterized in that: said movable support frame (13) can be regulated its height through bracing frame adjusting device (16), and bracing frame adjusting device (16) is for screwing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200186670U CN202516560U (en) | 2012-01-17 | 2012-01-17 | On-line cleaning and regeneration device for catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200186670U CN202516560U (en) | 2012-01-17 | 2012-01-17 | On-line cleaning and regeneration device for catalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202516560U true CN202516560U (en) | 2012-11-07 |
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ID=47099530
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200186670U Expired - Fee Related CN202516560U (en) | 2012-01-17 | 2012-01-17 | On-line cleaning and regeneration device for catalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202516560U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071545A (en) * | 2012-12-25 | 2013-05-01 | 北京国电龙源环保工程有限公司 | Ultrasonic cleaning device and method for regenerating catalyst |
| CN103203239A (en) * | 2013-03-08 | 2013-07-17 | 深圳市水苑水工业技术设备有限公司 | Technique and system device for regenerating exhaust gas denitration catalyst |
| CN103212423A (en) * | 2013-04-18 | 2013-07-24 | 武汉大学 | Online maintaining method of inactivating and denitrating catalyst |
-
2012
- 2012-01-17 CN CN2012200186670U patent/CN202516560U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071545A (en) * | 2012-12-25 | 2013-05-01 | 北京国电龙源环保工程有限公司 | Ultrasonic cleaning device and method for regenerating catalyst |
| CN103203239A (en) * | 2013-03-08 | 2013-07-17 | 深圳市水苑水工业技术设备有限公司 | Technique and system device for regenerating exhaust gas denitration catalyst |
| CN103212423A (en) * | 2013-04-18 | 2013-07-24 | 武汉大学 | Online maintaining method of inactivating and denitrating catalyst |
| CN103212423B (en) * | 2013-04-18 | 2015-04-29 | 武汉大学 | Online maintaining method of inactivating and denitrating catalyst |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20160117 |
|
| EXPY | Termination of patent right or utility model |