CN105435864A - In-situ regeneration device and method for glass kiln SCR denitration catalyst - Google Patents
In-situ regeneration device and method for glass kiln SCR denitration catalyst Download PDFInfo
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- CN105435864A CN105435864A CN201510764153.8A CN201510764153A CN105435864A CN 105435864 A CN105435864 A CN 105435864A CN 201510764153 A CN201510764153 A CN 201510764153A CN 105435864 A CN105435864 A CN 105435864A
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Abstract
The invention relates to an in-situ regeneration device for a glass kiln SCR denitration catalyst, which comprises a denitration reactor, wherein the denitration reactor is connected with a washing device, a hot air conveying device and a dosing device; the dosing device is connected with a waste liquid collection device; the washing device is connected with the dosing device to form a circulation circuit. The in-situ regeneration device can be used for achieving in-situ regeneration of the denitration catalyst, and is high in regeneration efficiency, and meanwhile capable of preventing pollution of a regeneration solution to the environment, reducing the waste of regeneration solution and reducing the regeneration cost.
Description
Technical field
The invention belongs to the in-situ regeneration technical field of glass furnace SCR denitration, be specifically related to a kind of situ regeneration device for glass furnace SCR denitration and renovation process, for realizing the in-situ regeneration of denitrating catalyst.
Background technology
China's glass furnace also creates a large amount of nitrogen oxide (NO while promoting economic development
x).NO
xbe a kind ofly endanger huge atmosphere pollution, can cause the environmental problem such as photochemical fog, acid rain, also the moment threatens human health.For this reason, China " 12 " carries out NO comprehensively
xreduce discharging engineering.Reduce NO
xdischarge has Combustion Process Control and rear denitrating flue gas two approach of burning.In actual production, low NO
xcombustion technology efficiency is low, and mainly adopts gas denitrifying technology.At present, the SCR denitration technology in gas denitrifying technology has denitration rate high (can be greater than 90%), and selective good, the advantages such as technology maturation is reliable, become the main flow of glass furnace denitration.
In SCR denitration system, the part of most critical is catalyst, and its cost accounts for the 30%-50% of denitrification apparatus gross investment usually.At present, denitrating catalyst market consumption is huge.Denitrating catalyst is expensive in Flue Gas Denitrification Engineering, occupies very big share, and belong to running stores in cost of investment, and such as the annual amount of discarding of a 700MW unit catalyst is about 100m
3, the catalyst simultaneously changed because denitration activity declines is due to containing V
2o
5, heavy metal and other pollutants, belong to nuisance, must recycle.Invertibity poisoned catalyst and the active catalyst reduced can be re-used by regeneration, regeneration (return and produce regeneration) expense only has the 20-30% of whole renewal cost, and activity can return to original more than 90%, this method can produce the problems such as dismounting, replacing, expense increase.The problems such as in addition, in the in situ regeneration method of current denitrating catalyst, regeneration effect is poor, and the rear catalytic cycle of regeneration is short.
Therefore, situ regeneration device and the renovation process of inventing a kind of glass furnace SCR denitration are the technical barriers being badly in need of this area present stage solving.The present invention produces thus.
Summary of the invention
For the above-mentioned technical problem of prior art, the invention provides a kind of situ regeneration device for glass furnace SCR denitration and renovation process, object is the cost effective in-situ regeneration that can realize inactivation denitrating catalyst.
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of situ regeneration device of glass furnace SCR denitration, comprise Benitration reactor, described Benitration reactor is connected with cleaning device, hot-air conveying device and chemicals dosing plant, described chemicals dosing plant is connected with waste collecting device, described cleaning device is connected with chemicals dosing plant, forms a closed circuit.
Described cleaning device comprises the cleaning and regeneration nozzle for liquid be arranged on Benitration reactor, and described cleaning and regeneration nozzle for liquid is connected with circulating pump and filter, and described filter is connected with chemicals dosing plant.
Described hot-air conveying device comprises interconnective oil burner and air heat exchanger, and described air heat exchanger is connected with pressure fan and hot-air duct, and described hot-air duct is connected with Benitration reactor.
Described chemicals dosing plant comprises iris type precipitation dosing pond, and described waste collecting device comprises waste collection pond one and waste collection pond two, and described iris type precipitation dosing pond, waste collection pond one and waste collection pond two are interconnected by valve.
Described Benitration reactor is provided with gas flue.
An in situ regeneration method for glass furnace SCR denitration, comprises the following steps:
(1), the cleaning and regeneration nozzle for liquid started in Benitration reactor blows ash for several times, until be purged to without flying dust blowout, more manually purges several with the compressed air being mixed with appropriate amount of deionized water;
(2), in Benitration reactor, pass into the thermal air current being heated to more than 300 DEG C and heat certain hour;
(3), toward iris type precipitation dosing pond add appropriate deionized water, add appropriate bleeding agent and surfactant in deionized water, ON cycle pump cleans, until solution has consumed, by waste collection in waste collection pond one;
(4), the waste liquid in waste collection pond one in step (3) is poured in waste collection pond two, remove clean, open the valve of waste collection pond two to iris type precipitation dosing pond, in iris type precipitation dosing pond, configuration is applicable to the sulfuric acid solution of concentration, add appropriate sulfate in iris type precipitation dosing pond and clean special dose, ON cycle pump wash cycles, slowly constantly adds deionized water in cleaning process;
(5), the liquid in the waste liquid in the waste collection pond one in step (4) and iris type precipitation dosing pond is poured in waste collection pond two, clean by washed with de-ionized water, close the valve that waste liquid pool collects two, in iris type precipitation dosing pond, configure regenerated liquid, utilize circulating pump circular regeneration decaying catalyst;
(6), after regeneration ending, the unified waste liquid pool that is collected in of waste liquid is collected in two, passes into heated air drying certain hour;
(7), utilize the hot-air being heated to 500 DEG C by regeneration catalyzing oxidant layer calcining certain hour.
The described compressed air pressure with being mixed with appropriate amount of deionized water is 0.6-0.8MPa.
In described step (3), the content of bleeding agent is 0.1wt%-0.3wt%, and surface-active contents is 0.2wt%-0.5wt%.
In described step (4), the mass fraction of sulfuric acid used is 0.5wt%-2wt%.
The compound method of the regenerated liquid in described step (5) is: add ammonium metavanadate and ammonium paratungstate in deionized water, and the mass fraction of described ammonium metavanadate is 1wt%-4wt%, adds pH adjusting agent and regulates pH to be 4-6, V/W=1:5 in obtained regenerated liquid.
Beneficial effect of the present invention is as follows:
The situ regeneration device of glass furnace SCR denitration of the present invention and renovation process, not only achieve the in-situ regeneration of denitrating catalyst, regeneration efficiency is high, it also avoid the pollution of actified solution to environment simultaneously, decrease the waste of regenerated liquid, reduce regeneration cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of glass furnace denitrating catalyst situ regeneration device of the present invention;
Fig. 2 is the flow chart of glass furnace denitrating catalyst in-situ regeneration technique of the present invention;
In Fig. 1,1 be Benitration reactor, 2 be cleaning and regeneration nozzle for liquid, 3 be oil burner, 4 be air heat exchanger, 5 be pressure fan, 6 be circulating pump, 7 be filter, 8 be iris type precipitation dosing pond, 9 for waste collection pond two, 10 for waste collection pond one, 11 is gas flue, 12 is hot-air duct, 13 is thermometer, 14 is flowmeter, 15 is valve.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to this.
As shown in Figure 1, the situ regeneration device of glass furnace SCR denitration of the present invention, comprise the Benitration reactor 1 being provided with gas flue 11, Benitration reactor 1 is connected with cleaning device, hot-air conveying device and chemicals dosing plant, chemicals dosing plant is connected with waste collecting device, cleaning device is connected with chemicals dosing plant, forms a closed circuit.
Chemicals dosing plant in the present invention is iris type precipitation dosing pond 8, and cleaning device comprises the cleaning and regeneration nozzle for liquid 2 be arranged on Benitration reactor 1, and cleaning and regeneration nozzle for liquid 2 is connected with circulating pump 6 and filter 7, and filter 7 and iris type precipitate dosing pond 8 and be connected.
Hot-air conveying device in the present invention comprises interconnective oil burner 3 and air heat exchanger 4, and air heat exchanger 4 is connected with pressure fan 5 and hot-air duct 12, and hot-air duct 12 is connected with Benitration reactor 1.
Waste collecting device in the present invention comprises waste collection pond 1 and waste collection pond 29, and iris type precipitation dosing pond 8, waste collection pond 1 and waste collection pond 29 are interconnected by valve 15.
As shown in Figure 2, the in situ regeneration method of the glass furnace SCR denitration in the present invention, comprises the following steps:
(1), the cleaning and regeneration nozzle for liquid 2 started in Benitration reactor 1 blows ash for several times, blow out until be purged to without flying dust, manually purge for several times with the compressed air being mixed with appropriate amount of deionized water, time this compressed-air actuated pressure is 0.6-0.8MPa, the effect of purging is best again;
(2), in Benitration reactor 1, the thermal air current being heated to more than 300 DEG C is passed into and continuous heating 30min;
(3), 2m is added toward iris type precipitation dosing pond 8
3deionized water, add bleeding agent that 2kg content is 0.1wt%-0.3wt% in deionized water and 4kg content is the surfactant of 0.2wt%-0.5wt%, ON cycle pump 6 cleans, until solution has consumed, by waste collection in waste collection pond 1;
(4), the waste liquid in waste collection pond 1 in step (3) is poured in waste collection pond 29, remove clean, open the valve 15 of waste collection pond 29 to iris type precipitation dosing pond 8, in iris type precipitation dosing pond 8, configuration quality mark is the sulfuric acid solution of 0.5wt%-2wt%, add appropriate sulfate in iris type precipitation dosing pond 8 and clean special dose, ON cycle pump 6 wash cycles, slowly constantly adds deionized water in cleaning process;
(5), the liquid in the waste liquid in the waste collection pond 1 in step (4) and iris type precipitation dosing pond 8 is poured in waste collection pond 29, clean by washed with de-ionized water, close the valve 15 that waste liquid pool collects 29, in iris type precipitation dosing pond 8, configure regenerated liquid, utilize circulating pump 6 circular regeneration decaying catalyst;
The compound method of regenerated liquid is: at 2m
3add 20kg ammonium metavanadate and 100kg ammonium paratungstate in deionized water, the mass fraction of ammonium metavanadate is 1wt%-4wt%, adds pH adjusting agent and regulates pH to be 4-6, V/W=1:5 in obtained regenerated liquid.
(6), after regeneration ending, the unified waste liquid pool that is collected in of waste liquid is collected in 29, starts oil burner 3 and adds hot-air to 100 DEG C, dry 60min;
(7), start oil burner 3 add hot-air to 500 DEG C, with thermometer 13 control temperature, then by regenerated catalyst layer calcining 60min, naturally cooling, regeneration ending.
Purge in the present embodiment in compressed air add appropriate deionized water object be remove become hard ash group because long-time dust stratification is agglomerating, make it become soft, catalyst surface dust purged totally completely.
The object passing into the hot air 30min of 300 DEG C in the present embodiment in reactor is that the coal tar composition volatilization making glass furnace denitrating catalyst surface attachment is removed.
In sulfuric acid solution, add the object that appropriate sulfate cleans special dose in the present embodiment be to remove surperficial obstinate sulfate composition.
The object constantly adding deionized water in the present embodiment in sulfuric acid cleaned process is the acidity constantly reducing cleaning fluid, alleviates corrosion of metal in reactor.
In the present embodiment, the object of waste collecting device is can effectively collect the waste liquid produced in regenerative process, prevents the pollution to environment, can reduce the waste of cleaning and regeneration liquid simultaneously, reduce costs.
Utilize the oil burner 3 newly increased to add hot-air in the present invention to be passed into object in Benitration reactor 1 and to be in the regenerative process of catalyst that required heating, drying, calcining are hot, can also heat flue gas under flue gas low-temperature condition simultaneously, reach the optimum temperature needed for catalyst.
As seen from the above-described embodiment, the present invention not only achieves the in-situ regeneration of denitrating catalyst, and regeneration efficiency is high, it also avoid the pollution of actified solution to environment simultaneously, decreases the waste of regenerated liquid, reduce regeneration cost.
Above-described embodiment only illustrates inventive concept of the present invention for explaining, but not the restriction to rights protection of the present invention, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should fall into protection scope of the present invention.
Claims (10)
1. the situ regeneration device of a glass furnace SCR denitration, it is characterized in that: comprise Benitration reactor, described Benitration reactor is connected with cleaning device, hot-air conveying device and chemicals dosing plant, described chemicals dosing plant is connected with waste collecting device, described cleaning device is connected with chemicals dosing plant, forms a closed circuit.
2. the situ regeneration device of glass furnace SCR denitration as claimed in claim 1, it is characterized in that: described cleaning device comprises the cleaning and regeneration nozzle for liquid be arranged on Benitration reactor, described cleaning and regeneration nozzle for liquid is connected with circulating pump and filter, and described filter is connected with chemicals dosing plant.
3. the situ regeneration device of glass furnace SCR denitration as claimed in claim 1, it is characterized in that: described hot-air conveying device comprises interconnective oil burner and air heat exchanger, described air heat exchanger is connected with pressure fan and hot-air duct, and described hot-air duct is connected with Benitration reactor.
4. the situ regeneration device of glass furnace SCR denitration as claimed in claim 1, it is characterized in that: described chemicals dosing plant comprises iris type precipitation dosing pond, described waste collecting device comprises waste collection pond one and waste collection pond two, and described iris type precipitation dosing pond, waste collection pond one and waste collection pond two are interconnected by valve.
5. the situ regeneration device of glass furnace SCR denitration as claimed in claim 1, is characterized in that: described Benitration reactor is provided with gas flue.
6. an in situ regeneration method for glass furnace SCR denitration, is characterized in that comprising the following steps:
(1), the cleaning and regeneration nozzle for liquid started in Benitration reactor blows ash for several times, until be purged to without flying dust blowout, more manually purges several with the compressed air being mixed with appropriate amount of deionized water;
(2), in Benitration reactor, pass into the thermal air current being heated to more than 300 DEG C and heat certain hour;
(3), toward iris type precipitation dosing pond add appropriate deionized water, add appropriate bleeding agent and surfactant in deionized water, ON cycle pump cleans, until solution has consumed, by waste collection in waste collection pond one;
(4) waste liquid in waste collection pond one in step (3) is poured in waste collection pond two, remove clean, open the valve of waste collection pond two to iris type precipitation dosing pond, in iris type precipitation dosing pond, configuration is applicable to the sulfuric acid solution of concentration, add appropriate sulfate in iris type precipitation dosing pond and clean special dose, ON cycle pump wash cycles, slowly constantly adds deionized water in cleaning process;
(5) liquid in the waste liquid in the waste collection pond one in step (4) and iris type precipitation dosing pond is poured in waste collection pond two, clean by washed with de-ionized water, close the valve that waste liquid pool collects two, in iris type precipitation dosing pond, configure regenerated liquid, utilize circulating pump circular regeneration decaying catalyst;
(6), after regeneration ending, the unified waste liquid pool that is collected in of waste liquid is collected in two, passes into heated air drying certain hour;
(7) utilize the hot-air being heated to 500 DEG C by regeneration catalyzing oxidant layer calcining certain hour.
7. the in situ regeneration method of glass furnace SCR denitration as claimed in claim 6, is characterized in that: the described compressed air pressure with being mixed with appropriate amount of deionized water is 0.6-0.8MPa.
8. the in situ regeneration method of glass furnace SCR denitration as claimed in claim 6, it is characterized in that: in described step (3), the content of bleeding agent is 0.1wt%-0.3wt%, and surface-active contents is 0.2wt%-0.5wt%.
9. the in situ regeneration method of glass furnace SCR denitration as claimed in claim 6, is characterized in that: in described step (4), the mass fraction of sulfuric acid used is 0.5wt%-2wt%.
10. the in situ regeneration method of glass furnace SCR denitration as claimed in claim 6, it is characterized in that the compound method of the regenerated liquid in described step (5) is: add ammonium metavanadate and ammonium paratungstate in deionized water, the mass fraction of described ammonium metavanadate is 1wt%-4wt%, adding pH adjusting agent regulates pH to be 4-6, V/W=1:5 in obtained regenerated liquid.
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Cited By (6)
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| CN110013886A (en) * | 2018-01-09 | 2019-07-16 | 中国石油化工股份有限公司 | Catalyst situ regeneration device |
| CN110013887A (en) * | 2018-01-09 | 2019-07-16 | 中国石油化工股份有限公司 | The in situ regeneration method of catalyst inactivation |
| CN113477279A (en) * | 2021-07-27 | 2021-10-08 | 苏州西热节能环保技术有限公司 | Waste heat utilization method and device in denitration catalyst regeneration process |
| CN113499804A (en) * | 2021-06-29 | 2021-10-15 | 苏州西热节能环保技术有限公司 | Channel type countercurrent regeneration system for catalyst |
| CN114307909A (en) * | 2022-01-04 | 2022-04-12 | 湖南烯富环保科技有限公司 | Full-automatic regeneration dechlorination agent production line and production method for dechlorination slag |
| CN114870910A (en) * | 2022-05-24 | 2022-08-09 | 天津水泥工业设计研究院有限公司 | Method for carrying out in-situ regeneration on SCR denitration catalyst by coupling with cement production process |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110013886A (en) * | 2018-01-09 | 2019-07-16 | 中国石油化工股份有限公司 | Catalyst situ regeneration device |
| CN110013887A (en) * | 2018-01-09 | 2019-07-16 | 中国石油化工股份有限公司 | The in situ regeneration method of catalyst inactivation |
| CN110013886B (en) * | 2018-01-09 | 2021-11-02 | 中国石油化工股份有限公司 | Catalyst in-situ regeneration device |
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| CN113499804A (en) * | 2021-06-29 | 2021-10-15 | 苏州西热节能环保技术有限公司 | Channel type countercurrent regeneration system for catalyst |
| CN113477279A (en) * | 2021-07-27 | 2021-10-08 | 苏州西热节能环保技术有限公司 | Waste heat utilization method and device in denitration catalyst regeneration process |
| CN114307909A (en) * | 2022-01-04 | 2022-04-12 | 湖南烯富环保科技有限公司 | Full-automatic regeneration dechlorination agent production line and production method for dechlorination slag |
| CN114870910A (en) * | 2022-05-24 | 2022-08-09 | 天津水泥工业设计研究院有限公司 | Method for carrying out in-situ regeneration on SCR denitration catalyst by coupling with cement production process |
| CN114870910B (en) * | 2022-05-24 | 2024-04-30 | 天津水泥工业设计研究院有限公司 | Method for in-situ regeneration of SCR denitration catalyst by coupling with cement production process |
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Application publication date: 20160330 |