CN102861621B - Movable cleaning and regenerating device and cleaning and regenerating method for SCR (selective catalytic reduction) denitration catalysts - Google Patents
Movable cleaning and regenerating device and cleaning and regenerating method for SCR (selective catalytic reduction) denitration catalysts Download PDFInfo
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Abstract
Disclosed are a movable cleaning and regenerating device and a cleaning and regenerating method for SCR (selective catalytic reduction) denitration catalysts. The device comprises a soot blowing system, a cleaning and regenerating system and a drying and calcining system. The complete offline cleaning and regenerating system for the SCR catalysts is highly integrated to be mobile, can be transported to a user via railway or road traffic to clean the SCR catalysts according to the degree of catalyst poisoning, and the catalysts are regenerated by adding catalytic ingredients while sediments, pore blockage, alkali metal and other soluble toxic substances on surfaces of the catalysts are removed. The device and the method have the advantages that activity of the catalysts is improved, the service lives of the catalysts are prolonged, a full cleaning and regenerating process can be completed without long-distance transportation, the catalysts can be regenerated to the greatest extent, cleaning cycle of the catalysts is shortened, and cost is saved for the user of the SCR denitration catalysts.
Description
Technical field
The present invention relates to SCR denitrating catalyst cleaning and regeneration technical field, be specifically related to a kind of packaged type SCR denitrating catalyst cleaning regenerating unit and cleaning and regeneration method.
Background technology
Along with the issuing and implementation of new edition " fossil-fuel power plant atmospheric pollutant emission standard " during " 12 ", thermal power plant is more and more stricter for the requirement of discharged nitrous oxides control, and discharge how effectively to control nitrogen oxide has become one of important topic urgently to be resolved hurrily in current field of Environment Protection.SCR (Selective Catalytic Reduction is called for short SCR) is the Major Technology that current coal steam-electric plant smoke denitration adopts, and catalyst is the core of SCR flue gas denitrification system.SCR catalyst is in use due to ash cutting, deposition of solids and alkali (soil) metal poisoning, and its active meeting constantly declines, and the commercial catalyst life-span is generally 2 to 3 years at present.Catalyst is expensive, and its purchase cost occupies 40% left and right of Flue Gas Denitrification Engineering one-time investment, and belongs to running stores.Meanwhile, catalyst raw material is poisonous, and spent catalyst is difficult to process, and easily environment is produced to secondary pollution.
At present, in many employing cleaning and regeneration mode extending catalyst life-spans, save denitration costs both at home and abroad.Wherein be divided into on-line cleaning and off-line and clean, on-line cleaning is convenient and swift, and cost is relatively cheap, but catalyst activity is recovered to limited.It is generally that catalyst module is disassembled and is transported to special factory that off-line cleans, and utilizes professional equipment to carry out cleaning and regeneration.Off-line cleans can carry out cleaning and regeneration to SCR denitrating catalyst thoroughly, the activation recovering degree of regeneration rear catalyst is higher, but the problem that this technology exists is need to dismantle catalyst, transport, process is loaded down with trivial details, complex process, required personnel are many, cleaning frequency is long, has increased the fringe cost of cleaning and regeneration.Catalyst is easily damaged in disassembled for transport process.
Summary of the invention
For solving above-mentioned problems of the prior art, order of the present invention is to provide a kind of packaged type SCR denitrating catalyst cleaning regenerating unit and cleaning and regeneration method, apparatus of the present invention can be used railway or highway transportation to the thermal power plant that need to clean inactivation SCR catalyst, and complete the entire flow of the cleaning and regeneration of SCR denitrating catalyst in thermal power plant, when at utmost bringing back to life catalyst, exempt traditional off-line and cleaned the drawback that needs long-distance transportation catalyst.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of packaged type SCR denitrating catalyst cleaning regenerating unit, comprise the regenerated liquid container 1 that is built-in with electric mixer 2, the fluid injector array 4 being connected by fluid pipeline 3 with regenerated liquid container 1, cleaning case 15 tops pass into fluid injector array 4, on the fluid pipeline 3 being connected in regenerated liquid container 1 and fluid injector array 4, be provided with pump 5 and liquid choke valve 6, the first gate valve 7 is set on the fluid pipeline 3 between regenerated liquid container 1 and pump 5, fluid pipeline 3 between pump 5 and the first gate valve 7 and external deionized water or acid solution are connected by outside connector 9 and the second gate valve 8, cleaning case 15 bottoms pass into gas nozzle array 14, gas nozzle array 14 is connected by pipeline 11 and hot-blast stove 10, on the pipeline 11 being connected at gas nozzle array 14 and hot-blast stove 10, be provided with blower fan 12 and choke valve 13, catalyst module 16 is placed on the hollow out dividing plate 17 of cleaning case 15 bottoms, be provided with the draining/tracheae 18 of the 3rd gate valve 19 in cleaning case 15 afterbody bottoms, top is provided with the slide rail crane 20 of lifting catalyst module 16, middle part is provided with supersonic generator 21, described regenerated liquid container 1, fluid pipeline 3, fluid injector array 4, pump 5, liquid choke valve 6, outside connector 9, cleaning case 15, draining/tracheae 18 and supersonic generator 21 have formed cleaning and regenerative system, described hot-blast stove 10, pipeline 11, blower fan 12, choke valve 13, gas nozzle array 14, cleaning case 15 and draining/tracheae 18 have formed drying and calcining system, and described drying and calcining system can be taken into account ash and the bubbling effect of blowing simultaneously.
The inwall of described regenerated liquid container 1, electric mixer 2, fluid pipeline 3, cleaning case 15 and fluid injector array 4, gas nozzle array 14, hollow out dividing plate 17, draining/tracheae 18 all adopt acid corrosion-resistant materials processing making or carry out anti-corrosion spray processing.
Described cleaning case 15 inwalls adopt exotic material.
A cleaning and regeneration method for packaged type SCR denitrating catalyst cleaning regenerating unit, step is as follows:
Step 1: detect: test poisoned catalyst activity, and determine cleaning and regeneration system cleaning fluid regenerated liquid used concentration and cleaning and regeneration time according to degree of intoxication, level of deactivation exceedes 80% and thinks severe inactivation, and 50%-80% is moderate inactivation, is slight inactivation lower than 50%;
Step 2: liquid processed: add regenerated liquid container 1 to configure regenerated liquid oxalic acid solution, Dispersant MF, ammonium metavanadate and ammonium metatungstate, use electric mixer to stir and within 10 minutes, obtain above regenerated liquid, wherein to account for the percentage by weight of regenerated liquid be 1wt% to Dispersant MF, the percentage by weight that ammonium metavanadate accounts for regenerated liquid is 5-10wt%, the percentage by weight that ammonium paratungstate concentration accounts for regenerated liquid is 15-20wt%, with oxalic acid solution by the pH value of regenerated liquid for being adjusted to 6;
Step 3: install: open the door of cleaning case 15, catalyst module 16 is vertically hung in cleaning case 15 with slide rail crane 20, and pile up neat, accurately according to region, close the door of cleaning case 15;
Step 4: blow ash: open the 3rd gate valve 19, open blower fan 12, keep hot-blast stove 10 to close or underload, regulate choke valve 13, the gas flow rate that makes gas nozzle array 14 is 13-22m/s, keeps 5-10 minute;
Step 5: washing: close blower fan 12, choke valve 13, close the first gate valve 7, open the second gate valve 8, external deionized water, to outside connector 9, is opened pump 5, regulator solution body choke valve 6, making fluid injector array 4 place's flow velocitys is 1-3m/s, keeps 5-8 minute;
Step 6: pickling: close pump 5, close the 3rd gate valve 19, outside connector 9 changes acid solution into, described acid solution is the aqueous solution that contains sulfuric acid and acid restrainer, wherein sulfuric acid concentration in the aqueous solution is 0.5mol/L, acid restrainer percentage by weight in the aqueous solution is 0.1%, open pump 5, regulator solution body choke valve 6 makes fluid injector array 4 place's flow velocitys be no more than 2m/s, rise to while not having catalyst module completely until acid solution liquid level, close pump 5 and liquid choke valve 6, open blower fan 12 and choke valve 13, adjustments of gas nozzle array 14 place's gas flow rates are 0.2-0.5m/s, the washing of generation bubble-help, open supersonic generator 21, keep 15-20 minute,
Step 7: regeneration: close supersonic generator 21, open the 3rd gate valve 19, after treating fluid discharge, close blower fan 12 and choke valve 13, close the second gate valve 8 and the 3rd gate valve 19, open the first gate valve 7, open pump 5, regulator solution body choke valve 6 makes fluid injector array 4 place's flow velocitys be no more than 2m/s, rises to while not having catalyst module completely until regenerated liquid liquid level, closes pump 5 and liquid choke valve 6, open blower fan 12 and choke valve 13, adjustments of gas nozzle array 14 place's gas flow rates are 0.2-0.5m/s, produce bubble-help regeneration, keep 15-20 minute;
Step 8: dry: to open the 3rd gate valve 19, after treating fluid discharge, regulate hot-blast stove 10 power, making hot blast temperature is 220 ℃, regulate blower fan 12 and choke valve 13, making gas nozzle array 14 place's hot blast flow velocitys is 1m/s, after draining/tracheae 18 place's temperature reach 200 ℃, starts timing, keeps 20-30min;
Step 9: calcining: regulate hot-blast stove 10 power, make hot blast temperature reach 500 ℃, start timing after draining/tracheae 18 place's temperature reach 450 ℃, keep 60-90min;
Step 10: unloading: after case 15 to be cleaned is cooling, open the door of cleaning case 15, catalyst module 16 is vertically hung out with slide rail crane 20, station boiler completes by SCR denitrating catalyst cleaning and regeneration overall process.
Compared to the prior art, tool has the following advantages in the present invention:
This packaged type SCR catalyst cleaning regenerating unit can be transported to as required user visit clean service, avoided the long-distance transportation of catalyst, avoided traffic-induced damage, save clean cost.
2. this device is compared with existing movable cleaning device, can be in cleaning inactivation SCR catalyst, and complete regeneration, be dried, the omnidistance cleaning and regeneration process such as calcining, greatly improve the effect of cleaning and regeneration.
3. this device is compared with the fixing purging system of existing off-line, and device integration is high, and cost is lower, and has adopted high-performance hot-blast stove, has improved calcining heat, has obtained better cleaning and regeneration effect.
4. this device has adopted Ultrasonic Cleaning and bubble to clean means, has improved cleaning performance.
5. this device can be according to preparing regenerated liquid for the poisoning situation of difference and degree of intoxication, determines and blow ash, cleaning, pickling, regeneration, dry, calcination time, for user formulates personalized solution.
Accompanying drawing explanation
Accompanying drawing is the structural representation of apparatus of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in drawings, a kind of packaged type SCR of the present invention denitrating catalyst cleaning regenerating unit, comprise the regenerated liquid container 1 that is built-in with electric mixer 2, the fluid injector array 4 being connected by fluid pipeline 3 with regenerated liquid container 1, cleaning case 15 tops pass into fluid injector array 4, on the fluid pipeline 3 being connected in regenerated liquid container 1 and fluid injector array 4, be provided with pump 5 and liquid choke valve 6, the first gate valve 7 is set on the fluid pipeline 3 between regenerated liquid container 1 and pump 5, fluid pipeline 3 between pump 5 and the first gate valve 7 and external deionized water or acid solution are connected by outside connector 9 and the second gate valve 8, cleaning case 15 bottoms pass into gas nozzle array 14, gas nozzle array 14 is connected by pipeline 11 and hot-blast stove 10, on the pipeline 11 being connected at gas nozzle array 14 and hot-blast stove 10, be provided with blower fan 12 and choke valve 13, catalyst module 16 is placed on the hollow out dividing plate 17 of cleaning case 15 bottoms, be provided with the draining/tracheae 18 of the 3rd gate valve 19 in cleaning case 15 afterbody bottoms, top is provided with the slide rail crane 20 of lifting catalyst module 16, middle part is provided with supersonic generator 21, described regenerated liquid container 1, fluid pipeline 3, fluid injector array 4, pump 5, liquid choke valve 6, outside connector 9, cleaning case 15, draining/tracheae 18 and supersonic generator 21 have formed cleaning and regenerative system, described hot-blast stove 10, pipeline 11, blower fan 12, choke valve 13, gas nozzle array 14, cleaning case 15 and draining/tracheae 18 have formed drying and calcining system, and described drying and calcining system can be taken into account ash and the bubbling effect of blowing simultaneously.
Preferably, the inwall of described regenerated liquid container 1, electric mixer 2, fluid pipeline 3, cleaning case 15 and fluid injector array 4, gas nozzle array 14, hollow out dividing plate 17, draining/tracheae 18 all adopt acid corrosion-resistant materials processing make and carry out anti-corrosion spray processing, as adopt super 304 stainless steels or 316L stainless steel and rust prevention by applying liquid material paint.
Preferably, described cleaning case 15 inwalls adopt corrosion-and high-temp-resistant material, as adopted ceramic tile.The casing of whole cleaning case 15 must guarantee air-tightness.
Embodiment mono-:
As shown in drawings, the cleaning and regeneration method of a kind of packaged type SCR of the present embodiment denitrating catalyst cleaning regenerating unit, step is as follows:
Step 1: detect: test poisoned catalyst activity, determine catalyst 80% and above inactivation, be severe inactivation;
Step 2: liquid processed: add regenerated liquid container 1 to configure regenerated liquid oxalic acid solution, Dispersant MF, ammonium metavanadate and ammonium metatungstate, use electric mixer to stir and within 10 minutes, obtain above regenerated liquid, wherein to account for the percentage by weight of regenerated liquid be 1wt% to Dispersant MF, the percentage by weight that ammonium metavanadate accounts for regenerated liquid is 10wt%, the percentage by weight that ammonium paratungstate concentration accounts for regenerated liquid is 20wt%, with oxalic acid solution by the pH value of regenerated liquid for being adjusted to 6;
Step 3: install: open the door of cleaning case 15, catalyst module 16 is vertically hung in cleaning case 15 with slide rail crane 20, and pile up neat, accurately according to region, close the door of cleaning case 15;
Step 4: blow ash: open the 3rd gate valve 19, open blower fan 12, keep hot-blast stove 10 to close or underload, regulate choke valve 13, the gas flow rate that makes gas nozzle array 14 is 18-22m/s, keeps 10 minutes;
Step 5: washing: close blower fan 12, choke valve 13, close the first gate valve 7, open the second gate valve 8, external deionized water, to outside connector 9, is opened pump 5, regulator solution body choke valve 6, making fluid injector array 4 place's flow velocitys is 3m/s, keeps 8 minutes;
Step 6: pickling: close pump 5, close the 3rd gate valve 19, outside connector 9 changes acid solution into, described acid solution is the aqueous solution that contains sulfuric acid and acid restrainer, wherein sulfuric acid concentration in the aqueous solution is 0.5mol/L, acid restrainer percentage by weight in the aqueous solution is 0.1%, open pump 5, regulator solution body choke valve 6 makes fluid injector array 4 place's flow velocitys be no more than 2m/s, rise to while not having catalyst module completely until acid solution liquid level, close pump 5 and liquid choke valve 6, open blower fan 12 and choke valve 13, adjustments of gas nozzle array 14 place's gas flow rates are 0.2m/s, the washing of generation bubble-help, open supersonic generator 21, keep 20 minutes,
Step 7: regeneration: close supersonic generator 21, open the 3rd gate valve 19, after treating fluid discharge, close blower fan 12 and choke valve 13, close the second gate valve 8 and the 3rd gate valve 19, open the first gate valve 7, open pump 5, regulator solution body choke valve 6 makes fluid injector array 4 place's flow velocitys be no more than 2m/s, rises to while not having catalyst module completely until regenerated liquid liquid level, closes pump 5 and liquid choke valve 6, open blower fan 12 and choke valve 13, adjustments of gas nozzle array 14 place's gas flow rates are 0.2m/s, produce bubble-help regeneration, keep 20 minutes;
Step 8: dry: to open the 3rd gate valve 19, after treating fluid discharge, regulate hot-blast stove 10 power, making hot blast temperature is 220 ℃, regulate blower fan 12 and choke valve 13, making gas nozzle array 14 place's hot blast flow velocitys is 1m/s, after draining/tracheae 18 place's temperature reach 200 ℃, starts timing, keeps 30min;
Step 9: calcining: regulate hot-blast stove 10 power, make hot blast temperature reach 500 ℃, start timing after draining/tracheae 18 place's temperature reach 450 ℃, keep 90min;
Step 10: unloading: after case 15 to be cleaned is cooling, open the door of cleaning case 15, catalyst module 16 is vertically hung out with slide rail crane 20, station boiler completes by SCR denitrating catalyst cleaning and regeneration overall process.
Embodiment bis-:
As shown in drawings, the cleaning and regeneration method of a kind of packaged type SCR of the present embodiment denitrating catalyst cleaning regenerating unit, step is as follows:
Step 1: detect: test poisoned catalyst activity, determine catalyst 50%-80% inactivation, be moderate inactivation;
Step 2: liquid processed: add regenerated liquid container 1 to configure regenerated liquid oxalic acid solution, Dispersant MF, ammonium metavanadate and ammonium metatungstate, use electric mixer to stir and within 10 minutes, obtain above regenerated liquid, wherein to account for the percentage by weight of regenerated liquid be 1wt% to Dispersant MF, the percentage by weight that ammonium metavanadate accounts for regenerated liquid is 8wt%, the percentage by weight that ammonium paratungstate concentration accounts for regenerated liquid is 18wt%, with oxalic acid solution by the pH value of regenerated liquid for being adjusted to 6;
Step 3: install: open the door of cleaning case 15, catalyst module 16 is vertically hung in cleaning case 15 with slide rail crane 20, and pile up neat, accurately according to region, close the door of cleaning case 15;
Step 4: blow ash: open the 3rd gate valve 19, open blower fan 12, keep hot-blast stove 10 to close or underload, regulate choke valve 13, the gas flow rate that makes gas nozzle array 14 is 15-18m/s, keeps 8 minutes;
Step 5: washing: close blower fan 12, choke valve 13, close the first gate valve 7, open the second gate valve 8, external deionized water, to outside connector 9, is opened pump 5, regulator solution body choke valve 6, making fluid injector array 4 place's flow velocitys is 2m/s, keeps 8 minutes;
Step 6: pickling: close pump 5, close the 3rd gate valve 19, outside connector 9 changes acid solution into, described acid solution is the aqueous solution that contains sulfuric acid and acid restrainer, wherein sulfuric acid concentration in the aqueous solution is 0.5mol/L, acid restrainer percentage by weight in the aqueous solution is 0.1%, open pump 5, regulator solution body choke valve 6 makes fluid injector array 4 place's flow velocitys be no more than 2m/s, rise to while not having catalyst module completely until acid solution liquid level, close pump 5 and liquid choke valve 6, open blower fan 12 and choke valve 13, adjustments of gas nozzle array 14 place's gas flow rates are 0.3m/s, the washing of generation bubble-help, open supersonic generator 21, keep 15 minutes,
Step 7: regeneration: close supersonic generator 21, open the 3rd gate valve 19, after treating fluid discharge, close blower fan 12 and choke valve 13, close the second gate valve 8 and the 3rd gate valve 19, open the first gate valve 7, open pump 5, regulator solution body choke valve 6 makes fluid injector array 4 place's flow velocitys be no more than 2m/s, rises to while not having catalyst module completely until regenerated liquid liquid level, closes pump 5 and liquid choke valve 6, open blower fan 12 and choke valve 13, adjustments of gas nozzle array 14 place's gas flow rates are 0.5m/s, produce bubble-help regeneration, keep 15 minutes;
Step 8: dry: to open the 3rd gate valve 19, after treating fluid discharge, regulate hot-blast stove 10 power, making hot blast temperature is 220 ℃, regulate blower fan 12 and choke valve 13, making gas nozzle array 14 place's hot blast flow velocitys is 1m/s, after draining/tracheae 18 place's temperature reach 200 ℃, starts timing, keeps 20min;
Step 9: calcining: regulate hot-blast stove 10 power, make hot blast temperature reach 500 ℃, start timing after draining/tracheae 18 place's temperature reach 450 ℃, keep 90min;
Step 10: unloading: after case 15 to be cleaned is cooling, open the door of cleaning case 15, catalyst module 16 is vertically hung out with slide rail crane 20, station boiler completes by SCR denitrating catalyst cleaning and regeneration overall process.
Embodiment tri-:
As shown in drawings, the cleaning and regeneration method of a kind of packaged type SCR of the present embodiment denitrating catalyst cleaning regenerating unit, step is as follows:
Step 1: detect: test poisoned catalyst activity, determine catalyst 50% and following inactivation, be slight inactivation;
Step 2: liquid processed: add regenerated liquid container 1 to configure regenerated liquid oxalic acid solution, Dispersant MF, ammonium metavanadate and ammonium metatungstate, use electric mixer to stir and within 10 minutes, obtain above regenerated liquid, wherein to account for the percentage by weight of regenerated liquid be 1wt% to Dispersant MF, the percentage by weight that ammonium metavanadate accounts for regenerated liquid is 5wt%, the percentage by weight that ammonium paratungstate concentration accounts for regenerated liquid is 15wt%, with oxalic acid solution by the pH value of regenerated liquid for being adjusted to 6;
Step 3: install: open the door of cleaning case 15, catalyst module 16 is vertically hung in cleaning case 15 with slide rail crane 20, and pile up neat, accurately according to region, close the door of cleaning case 15;
Step 4: blow ash: open the 3rd gate valve 19, open blower fan 12, keep hot-blast stove 10 to close or underload, regulate choke valve 13, the gas flow rate that makes gas nozzle array 14 is 13-15m/s, keeps 5 minutes;
Step 5: washing: close blower fan 12, choke valve 13, close the first gate valve 7, open the second gate valve 8, external deionized water, to outside connector 9, is opened pump 5, regulator solution body choke valve 6, making fluid injector array 4 place's flow velocitys is 1m/s, keeps 5 minutes;
Step 6: pickling: close pump 5, close the 3rd gate valve 19, outside connector 9 changes acid solution into, described acid solution is the aqueous solution that contains sulfuric acid and acid restrainer, wherein sulfuric acid concentration in the aqueous solution is 0.5mol/L, acid restrainer percentage by weight in the aqueous solution is 0.1%, open pump 5, regulator solution body choke valve 6 makes fluid injector array 4 place's flow velocitys be no more than 2m/s, rise to while not having catalyst module completely until acid solution liquid level, close pump 5 and liquid choke valve 6, open blower fan 12 and choke valve 13, adjustments of gas nozzle array 14 place's gas flow rates are 0.5m/s, the washing of generation bubble-help, open supersonic generator 21, keep 15 minutes,
Step 7: regeneration: close supersonic generator 21, open the 3rd gate valve 19, after treating fluid discharge, close blower fan 12 and choke valve 13, close the second gate valve 8 and the 3rd gate valve 19, open the first gate valve 7, open pump 5, regulator solution body choke valve 6 makes fluid injector array 4 place's flow velocitys be no more than 2m/s, rises to while not having catalyst module completely until regenerated liquid liquid level, closes pump 5 and liquid choke valve 6, open blower fan 12 and choke valve 13, adjustments of gas nozzle array 14 place's gas flow rates are 0.5m/s, produce bubble-help regeneration, keep 15 minutes;
Step 8: dry: to open the 3rd gate valve 19, after treating fluid discharge, regulate hot-blast stove 10 power, making hot blast temperature is 220 ℃, regulate blower fan 12 and choke valve 13, making gas nozzle array 14 place's hot blast flow velocitys is 1m/s, after draining/tracheae 18 place's temperature reach 200 ℃, starts timing, keeps 20min;
Step 9: calcining: regulate hot-blast stove 10 power, make hot blast temperature reach 500 ℃, start timing after draining/tracheae 18 place's temperature reach 450 ℃, keep 60min;
Step 10: unloading: after case 15 to be cleaned is cooling, open the door of cleaning case 15, catalyst module 16 is vertically hung out with slide rail crane 20, station boiler completes by SCR denitrating catalyst cleaning and regeneration overall process.
Claims (4)
1. a packaged type SCR denitrating catalyst cleaning regenerating unit, it is characterized in that: comprise the regenerated liquid container (1) that is built-in with electric mixer (2), the fluid injector array (4) being connected by fluid pipeline (3) with regenerated liquid container (1), cleaning case (15) top passes into fluid injector array (4), on the fluid pipeline (3) being connected in regenerated liquid container (1) and fluid injector array (4), be provided with pump (5) and liquid choke valve (6), on the fluid pipeline (3) between regenerated liquid container (1) and pump (5), the first gate valve (7) is set, fluid pipeline (3) between pump (5) and the first gate valve (7) and external deionized water or acid solution are connected by outside connector (9) and the second gate valve (8), cleaning case (15) bottom passes into gas nozzle array (14), gas nozzle array (14) is connected by pipeline (11) and hot-blast stove (10), on the pipeline (11) being connected at gas nozzle array (14) and hot-blast stove (10), be provided with blower fan (12) and choke valve (13), catalyst module (16) is placed on the hollow out dividing plate (17) of cleaning case (15) bottom, be provided with the draining/tracheae (18) of the 3rd gate valve (19) in cleaning case (15) afterbody bottom, top is provided with the slide rail crane (20) of lifting catalyst module (16), middle part is provided with supersonic generator (21), described regenerated liquid container (1), fluid pipeline (3), fluid injector array (4), pump (5), liquid choke valve (6), outside connector (9), cleaning case (15), draining/tracheae (18) and supersonic generator (21) have formed cleaning and regenerative system, described hot-blast stove (10), pipeline (11), blower fan (12), choke valve (13), gas nozzle array (14), cleaning case (15) and draining/tracheae (18) have formed drying and calcining system, and described drying and calcining system can be taken into account ash and the bubbling effect of blowing simultaneously.
2. packaged type SCR denitrating catalyst cleaning regenerating unit according to claim 1, is characterized in that: the inwall of described regenerated liquid container (1), electric mixer (2), fluid pipeline (3), cleaning case (15) and fluid injector array (4), gas nozzle array (14), hollow out dividing plate (17), draining/tracheae (18) all adopt acid corrosion-resistant materials processing making or carry out anti-corrosion spray processing.
3. packaged type SCR denitrating catalyst cleaning regenerating unit according to claim 1, is characterized in that: described cleaning case (15) inwall adopts exotic material.
4. the cleaning and regeneration method of packaged type SCR denitrating catalyst cleaning regenerating unit claimed in claim 1, is characterized in that: step is as follows:
Step 1: detect: test poisoned catalyst activity, and determine cleaning and regeneration system cleaning fluid regenerated liquid used concentration and cleaning and regeneration time according to degree of intoxication, level of deactivation exceedes 80% and thinks severe inactivation, and 50%-80% is moderate inactivation, is slight inactivation lower than 50%;
Step 2: liquid processed: oxalic acid solution, Dispersant MF, ammonium metavanadate and ammonium metatungstate are added to regenerated liquid container (1) preparation regenerated liquid, use electric mixer to stir and within 10 minutes, obtain above regenerated liquid, wherein to account for the percentage by weight of regenerated liquid be 1wt% to Dispersant MF, the percentage by weight that ammonium metavanadate accounts for regenerated liquid is 5-10wt%, the percentage by weight that ammonium metatungstate accounts for regenerated liquid is 15-20wt%, the pH value of regenerated liquid is adjusted to 6 with oxalic acid solution;
Step 3: install: open the door of cleaning case (15), catalyst module (16) vertically hung in cleaning case (15) with slide rail crane (20), and pile up according to region neat, accurate, the door of closing cleaning case (15);
Step 4: blow ash: open the 3rd gate valve (19), open blower fan (12), keep hot-blast stove (10) to close or underload, regulate choke valve (13), the gas flow rate that makes gas nozzle array (14) is 13-22m/s, keeps 5-10 minute;
Step 5: washing: close blower fan (12), choke valve (13), close the first gate valve (7), open the second gate valve (8), external deionized water is to outside connector (9), open pump (5), regulator solution body choke valve (6), making fluid injector array (4) locate flow velocity is 1-3m/s, keeps 5-8 minute;
Step 6: pickling: close pump (5), close the 3rd gate valve (19), outside connector (9) changes acid solution into, described acid solution is the aqueous solution that contains sulfuric acid and acid restrainer, wherein sulfuric acid concentration in the aqueous solution is 0.5mol/L, acid restrainer percentage by weight in the aqueous solution is 0.1%, open pump (5), regulator solution body choke valve (6) makes fluid injector array (4) locate flow velocity and is no more than 2m/s, rise to while not having catalyst module completely until acid solution liquid level, close pump (5) and liquid choke valve (6), open blower fan (12) and choke valve (13), it is 0.2-0.5m/s that adjustments of gas nozzle array (14) is located gas flow rate, the washing of generation bubble-help, open supersonic generator (21), keep 15-20 minute,
Step 7: regeneration: close supersonic generator (21), open the 3rd gate valve (19), after treating fluid discharge, close blower fan (12) and choke valve (13), close the second gate valve (8) and the 3rd gate valve (19), open the first gate valve (7), open pump (5), regulator solution body choke valve (6) makes fluid injector array (4) locate flow velocity and is no more than 2m/s, rise to while not having catalyst module completely until regenerated liquid liquid level, close pump (5) and liquid choke valve (6), open blower fan (12) and choke valve (13), it is 0.2-0.5m/s that adjustments of gas nozzle array (14) is located gas flow rate, the regeneration of generation bubble-help, keep 15-20 minute,
Step 8: dry: to open the 3rd gate valve (19), after treating fluid discharge, regulate hot-blast stove (10) power, making hot blast temperature is 220 ℃, regulate blower fan (12) and choke valve (13), making gas nozzle array (14) locate hot blast flow velocity is 1m/s, and draining/tracheae (18) is located after temperature reaches 200 ℃ to start timing, keeps 20-30min;
Step 9: calcining: regulate hot-blast stove (10) power, make hot blast temperature reach 500 ℃, draining/tracheae (18) is located after temperature reaches 450 ℃ to start timing, keeps 60-90min;
Step 10: unloading: after case to be cleaned (15) is cooling, open the door of cleaning case (15), catalyst module (16) is vertically hung out with slide rail crane (20), station boiler completes by SCR denitrating catalyst cleaning and regeneration overall process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210361132.8A CN102861621B (en) | 2012-09-25 | 2012-09-25 | Movable cleaning and regenerating device and cleaning and regenerating method for SCR (selective catalytic reduction) denitration catalysts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210361132.8A CN102861621B (en) | 2012-09-25 | 2012-09-25 | Movable cleaning and regenerating device and cleaning and regenerating method for SCR (selective catalytic reduction) denitration catalysts |
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| Publication Number | Publication Date |
|---|---|
| CN102861621A CN102861621A (en) | 2013-01-09 |
| CN102861621B true CN102861621B (en) | 2014-05-28 |
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| CN103055963B (en) * | 2013-01-25 | 2015-02-04 | 龙净科杰环保技术（上海）有限公司 | Integrated regeneration system and method of mobile SCR (Selective Catalytic Reduction) denitrification catalyst |
| US8946105B2 (en) * | 2013-03-13 | 2015-02-03 | Steag Energy Services Gmbh | Methods for removing iron material from a substrate |
| CN103769247B (en) * | 2013-11-21 | 2015-11-18 | 浙江大学 | For the cleaning dust arrester of SCR catalyst regeneration |
| CN103877996B (en) * | 2014-04-11 | 2016-05-25 | 武汉梅斯特工程技术有限公司 | A kind of renovation process of SCR catalyst |
| CN104475174B (en) * | 2014-11-25 | 2017-06-06 | 安徽迪诺环保新材料科技有限公司 | The renovation process of the SCR denitration that fails |
| CN104690064B (en) * | 2015-01-14 | 2016-06-22 | 北京华电斯莱克顿技术有限公司 | A kind of SCR catalyst method for innocent treatment |
| CN105170198A (en) * | 2015-09-21 | 2015-12-23 | 武汉钢铁(集团)公司 | Industrialized regeneration method of SCR plate-type denitration catalyst |
| CN105435862A (en) * | 2015-12-14 | 2016-03-30 | 江苏肯创催化剂再生技术有限公司 | Fixed automatic cleaning and regeneration line and regeneration process for SCR denitration catalyst |
| CN107297226A (en) * | 2016-04-14 | 2017-10-27 | 南京开拓环保科技有限公司 | A kind of SCR denitration renovation process |
| CN107983419A (en) * | 2017-12-15 | 2018-05-04 | 江苏龙净科杰催化剂再生有限公司 | The atomic layer deposition method regeneration technology of denitrating catalyst |
| CN108744967B (en) * | 2018-05-18 | 2020-03-31 | 重庆市机电设计研究院 | Waste gas treatment catalyst dredging process |
| CN113856606B (en) * | 2021-11-15 | 2023-04-07 | 盐城工学院 | Solution deoxygenation device for potential step method and deoxygenation method thereof |
| CN115646556B (en) * | 2022-10-26 | 2023-12-08 | 北京北科环境工程有限公司 | Method for regenerating organic sulfur hydrolytic agent of blast furnace gas |
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| CN102389838A (en) * | 2011-09-21 | 2012-03-28 | 西安交通大学 | Device for on-line cleaning of selective catalyctic reduction (SCR) denitration catalyst and cleaning process thereof |
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| CN202803259U (en) * | 2012-09-25 | 2013-03-20 | 西安交通大学 | Movable SCR (Selective Catalytic Reduction) denitration catalyst washing and regenerating apparatus |
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| CN102389838A (en) * | 2011-09-21 | 2012-03-28 | 西安交通大学 | Device for on-line cleaning of selective catalyctic reduction (SCR) denitration catalyst and cleaning process thereof |
| CN102658215A (en) * | 2012-04-09 | 2012-09-12 | 南京工业大学 | SCR flue gas denitration catalyst regeneration method |
| CN202803259U (en) * | 2012-09-25 | 2013-03-20 | 西安交通大学 | Movable SCR (Selective Catalytic Reduction) denitration catalyst washing and regenerating apparatus |
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