CN201534059U - Renewable heat-accumulating type selective catalytic reduction denitration device - Google Patents
Renewable heat-accumulating type selective catalytic reduction denitration device Download PDFInfo
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- CN201534059U CN201534059U CN2009201088781U CN200920108878U CN201534059U CN 201534059 U CN201534059 U CN 201534059U CN 2009201088781 U CN2009201088781 U CN 2009201088781U CN 200920108878 U CN200920108878 U CN 200920108878U CN 201534059 U CN201534059 U CN 201534059U
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- ammonia
- gas
- spray
- accumulating type
- catalytic reduction
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Abstract
The utility model relates to a renewable heat-accumulating type selective catalytic reduction denitration device. The device adopts the structure that a catalytic bed layer and a heat-accumulating bed layer are arranged in a casing of the device and vertically distributed; the area where the catalytic bed layer and the heat-accumulating bed layer are located is uniformly divided into a plurality of axial gas flow passages; a gas distributing device capable of uniformly distributing a gas to be reacted is arranged below the axial gas flow passages; an ammonia injection chamber is arranged below the gas distributing device; an ammonia injection grid is arranged in the ammonia injection chamber; a gas inlet flue duct interface is arranged on the ammonia injection chamber; a catalytic reaction chamber is arranged above the catalytic bed layer and used for the full reaction of the gas to be reacted; a gas outlet flue duct interface is arranged on the catalytic reaction chamber; an inlet of the ammonia injection grid is connected with an ammonia outlet of an ammonia production device; and an ammonia injection regulating valve and an ammonia-air mixer are arranged on a connecting pipeline of the ammonia injection grid. The utility model integrates the technologies of ammonia injection, heat-accumulating type energy recovery and denitration, so as to realize the denitration of industrial waste gas at low and moderate temperatures.
Description
Technical field
The utility model relates to a kind of reproducible heat accumulating type selective catalytic reduction denitration device, belongs to environmental technology field.
Background technology
At present, the industrial waste gas that flue gas etc. contain nitrogen oxide adopts the catalytic oxidation mode to carry out the denitration processing more, under 200-400 degree centigrade reaction condition, and under the effect of catalyst, the NO that is contained in the waste gas
XSame NH
3React and generate N
2And H
2O.And the temperature of waste gas can not reach so high usually in the actual production.In order to realize above-mentioned reaction, adopt heater means usually, for example electricity, steam etc. make it to maintain this temperature, if necessary also will establish heat exchanger and reclaim heat.With this understanding, whole system energy consumption height, complexity.
At present the ammonia sprinkling equipment that adopts is more, but most spray equipment structures are too complicated, and often because that the injection direction of nozzle is provided with is unreasonable, influences ammonia with the flue gas mixed effect, and may increase the spray resistance.
Because it is generally lower to contain the industrial tail gas temperature of contaminative volatile matter, before carrying out catalytic reaction, need heating, and existing mode of heating adopts steam etc. that tail gas is heated usually, therefore consume big energy the same period, not only improved a large amount of wastes that the industrial waste gas processing cost also causes the energy.
The utility model content
In order to overcome the above-mentioned defective of prior art, the utility model provides a kind of reproducible heat accumulating type selective catalytic reduction denitration device, the utility model combines heat accumulating type energy recovery technology with denitration technology, make technological adaptability improve greatly, and with every technology become one the makeup put, simple in structure, easy for installation, easy operating, ammonia is with the good mixing effect of flue gas, catalytic reaction is thorough, and energy resource consumption is few.
The technical solution adopted in the utility model: a kind of reproducible heat accumulating type selective catalytic reduction denitration device, be provided with the catalytic bed and the accumulation of heat bed that distribute up and down in its housing, the zone at described catalytic bed and accumulation of heat bed place is separated into some axial flow passages equably, be provided with below described each axial flow passage and can make the equally distributed distribution device in gas-fluid of question response gas, it below the described distribution device in gas-fluid spray ammonia chamber, the indoor ammonia injection grid that is used to spray ammonia that is provided with of described spray ammonia, described spray ammonia chamber is provided with air inlet flue interface, be to be used for the catalytic reaction chamber that reacting gas fully reacts above the described catalytic bed, described catalytic reaction chamber is provided with the flue interface of giving vent to anger, the import that described ammonia sprays grid connects the ammonia outlet of making ammonia equipment, its connecting pipe is provided with spray ammonia control valve, also is provided with the ammonia air mixer.
Described accumulation of heat bed is formed by some regenerative block layering piles, is covered with the whole cross section of described gas channel, and described regenerative block adopts the material of high heat storage performance to make, and is provided with the hole that supplied gas is passed.
Described reproducible heat accumulating type selective catalytic reduction denitration device is provided with the fixed support that is used for fixing the movable frame of laying each layer regenerative block and is used to support these movable frames.
Described catalytic bed is formed by some catalysis piece layering piles, the whole cross section that is covered with described gas channel, described catalysis piece is provided with the hole that supplied gas is passed, and the surfaces externally and internally of described catalysis piece all scribbles high performance catalyst or described catalysis piece is made by the material that comprises catalyst.
Described reproducible heat accumulating type selective catalytic reduction denitration device is provided with and is used for fixing the movable frame of laying each layer catalysis piece and the fixed support that is used to support these movable frames.
The cross section of described housing is rounded, and described distribution device in gas-fluid is in the form of annular discs, is provided with some alternate breach, and its axis is overlapping with the axis of described housing, and its lower end connects transmission device by rotating shaft, and described transmission device is provided with drive motors.
Described ammonia sprays grid and comprises the female pipe of spray and one or more spray arm, and described spray arm connects the female pipe of described spray, and described spray arm is provided with the plurality of nozzles hole, and the inlet end of the female pipe of described spray is arranged on outside the described housing, connects system ammonia equipment.
Described spray arm is provided with degree adjustment valve, described degree adjustment valve is furnished with the control circuit that is used to control its aperture size, and described control circuit is connected with the flow sensor that is used to gather the pressure sensor of gas pressure in the described spray arm or is used to gather gas flow in the described spray arm; The female pipe of described spray is provided with the flow control valve that is used to control ammonia flow, described flow control valve is furnished with the flow-control module that is used to control its aperture, and described flow-control module is connected with the concentration sensor that is used to gather the flow sensor of gas flow in the female pipe of described spray and/or is used to gather ammonia concentration in the female pipe of described spray; The inlet end that described ammonia sprays grid also is provided with the ammonia air mixer that is used for ammonia and air mixing, dilutes ammonia concentration.
The quantity of described spray arm is a plurality of, is distributed in the both sides of the female pipe of described spray, and the employing welding manner connects or connects by flange between the female pipe of described spray arm and described spray.
Be provided with some dividing plates parallel in the described housing with axis, by described dividing plate the corresponding space in the housing is separated into described axial flow passage, described each dividing plate and described each axial flow passage are that symmetry axis evenly distributes along circumference with the axis of housing, the upper end of described each axial flow passage is uncovered, connects described catalytic reaction chamber.
The beneficial effects of the utility model: owing in reproducible heat accumulating type selective catalytic reduction denitration device, added the accumulation of heat bed of high thermal storage effect, the gas that enters described reproducible heat accumulating type selective catalytic reduction denitration device is by described accumulation of heat bed, and absorb heat in the described accumulation of heat bed and reach reaction temperature and enter described catalytic bed and carry out denitration reaction, the heat that produces in the denitration reaction is absorbed by described accumulation of heat bed again simultaneously, described accumulation of heat bed temperature recovers, low temperature ammonia in preparing against next time, the gaseous mixture of air and waste gas by the time heat, thereby reach recycling effect; Catalyst or catalysis material by selecting to suit make it have specificity, and denitration reaction is played catalytic action efficiently, to improve denitration effect; Because the ammonia through particular design sprays grid, it is grid-like that the arm formation is responsible for and is sprayed to spray, and spray is responsible for and the spray arm is provided with the plurality of nozzles hole, and be symmetrical distribution, it is balanced more that mixture pressure is distributed, and mixes more even with waste gas in the gas pipeline.Denitration efficiency of the present utility model can reach more than 90%, and heat recovery efficiency reaches more than 95%, and overall structure is simple, processing ease, and the scene is easy for installation, the time spent is few, and floor space is few, has saved a large amount of equipment costs and capital construction cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the schematic top plan view that ammonia of the present utility model sprays grid.
The specific embodiment
The utility model provides a kind of reproducible heat accumulating type selective catalytic reduction denitration device, be provided with the catalytic bed 1 and the accumulation of heat bed 2 that distribute up and down in its housing, the zone at described catalytic bed and accumulation of heat bed place is separated into some axial flow passages equably, be provided with below described each axial flow passage and can make the equally distributed distribution device in gas-fluid 3 of question response gas, it below the described distribution device in gas-fluid spray ammonia chamber 4, the indoor ammonia injection grid 8 that is used to spray ammonia that is provided with of described spray ammonia, described spray ammonia chamber is provided with air inlet flue 9 interfaces, for waste gas and ammonia are fully mixed, described ammonia sprays the exit that grid is arranged on described air inlet flue usually, the waste gas and the described ammonia that enter in the described reproducible heat accumulating type selective catalytic reduction denitration device by described air inlet flue spray the ammonia of grid ejection after the indoor abundant mixing of described spray ammonia, equably mixed gas is sent into described axial flow passage by described distribution device in gas-fluid, make it by described accumulation of heat bed and catalytic bed, be to be used for the catalytic reaction chamber 5 that reacting gas fully reacts above the described catalytic bed, mixed gas by described catalytic bed after in the indoor abundant reaction of described catalytic reaction, described catalytic reaction chamber is provided with flue 10 interfaces of giving vent to anger, reacted gas can be discharged described reproducible heat accumulating type selective catalytic reduction denitration device by the described flue of giving vent to anger, the import that described ammonia sprays grid connects the ammonia outlet of making ammonia equipment, its connecting pipe is provided with spray ammonia control valve, also is provided with the ammonia air mixer.
Described accumulation of heat bed is formed by some regenerative block layering piles, the whole cross section that is covered with described axial flow passage, described regenerative block adopts the material of high heat storage performance to make, and be provided with the hole that supplied gas is passed, must pass the hole on the described regenerative block when making mixed gas through described axial flow passage, fully contact with described regenerative block and carry out heat exchange, to reach the purpose of intensification.
Described reproducible heat accumulating type selective catalytic reduction denitration device is provided with the fixed support that is used for fixing the movable frame of laying each layer regenerative block and is used to support these movable frames, changes as long as extract corresponding framework out during replacing.
Described catalytic bed is formed by some catalysis piece layering piles, the whole cross section that is covered with described axial flow passage, described catalysis piece is provided with the hole that supplied gas is passed, its surfaces externally and internally all scribbles high performance catalyst or described catalysis piece is made by the material that comprises catalyst, must pass the hole on the described catalysis piece when making mixed gas through described axial flow passage, fully contact with the catalysis material on the described catalysis piece, to carry out catalytic oxidation.
Described reproducible heat accumulating type selective catalytic reduction denitration device is provided with and is used for fixing the movable frame of laying each layer catalysis piece and the fixed support that is used to support these movable frames, changes as long as extract corresponding framework out during replacing.
The cross section of described housing is rounded, described distribution device in gas-fluid is in the form of annular discs, described distribution device in gas-fluid is provided with some alternate breach, the shape of described breach is corresponding with described axial flow passage with distribution mode, also can be different with the shape of described axial flow passage, as long as can guarantee in rotary course, to connect successively each axial flow passage, described distribution device in gas-fluid can be provided with framework and other annex, its axis is overlapping with the axis of described housing, its lower end connects transmission device 6 by rotating shaft, described transmission device is provided with drive motors 7, rotates so that drive described distribution device in gas-fluid.
In order to guarantee the unobstructed of described axial flow passage, can also in described reproducible heat accumulating type selective catalytic reduction denitration device, steam blowing equipment be set, described steam blowing equipment is evenly distributed on the below of the described accumulation of heat bed in the described axial flow passage, comprise some steam jets and the jet pipe that is connected these nozzles, described each steam jet should be evenly distributed on the cross section of described axial flow passage substantially, do not stay the dead angle, the structure of described jet pipe can be provided with as required, can be that a jet pipe connects whole nozzles, also can be a plurality of jet pipes, each jet pipe respectively connects plurality of nozzles.High steam flows through described jet pipe after described nozzle ejection, with the vaporization of the organic polymer on the described accumulation of heat bed or purge.Its purge cycles can also can be the multiple of its work period, promptly through ventilating post-purge several times once with the work period unanimity of described axial flow passage.The jet pipe of described steam blowing equipment is fixedly mounted on the described housing, and its outer end connects jet chimney, to obtain required steam.
Can leave certain space between described accumulation of heat bed and the described catalytic bed, the sidewall in this space is provided with manhole 11, with convenient maintenance and maintenance.
Described ammonia sprays grid and comprises the female pipe 12 of spray and one or more spray arm 13, described spray arm connects the female pipe of described spray, described spray arm is provided with plurality of nozzles hole 14, described plurality of nozzles hole can evenly distribute, also can be according to other suitable regular distribution, the inlet end of the female pipe of described spray is arranged on outside the described housing, connects system ammonia equipment, and the female pipe of described spray is positioned at the indoor part of described spray ammonia and also the plurality of nozzles hole can be set.
Described spray arm is provided with degree adjustment valve 15, described degree adjustment valve is furnished with the control circuit that is used to control its aperture size, described control circuit is connected with the flow sensor that is used to gather the pressure sensor of gas pressure in the described spray arm or is used to gather gas flow in the described spray arm, realizes the control that respectively sprays the ammonia spraying amount of arm to described thus; The female pipe of described spray is provided with the flow control valve that is used to control ammonia flow, described flow control valve is furnished with the flow-control module that is used to control its aperture, described flow-control module is connected with the concentration sensor that is used to gather the flow sensor of gas flow in the female pipe of described spray and/or is used to gather ammonia concentration in the female pipe of described spray, realizes the control to total ammonia spraying amount thus; The inlet end that described ammonia sprays grid can also be provided with the ammonia air mixer that is used for ammonia and air mixing, dilutes ammonia concentration.
The quantity of described spray arm is a plurality of, be distributed in the both sides of the female pipe of described spray, also can be distributed in a side of the female pipe of described spray, the employing welding manner connects or connects by flange between the female pipe of described spray arm and described spray, it is indoor that described spray arm can all be arranged on described spray ammonia, also can partly or entirely insert in the described air inlet flue.
The female pipe of described spray can be that straight tube maybe can be a bend pipe, when described spray arm partly or entirely inserts in the described air inlet flue, the bearing of trend of described spray arm can with the axially parallel of described air inlet flue or axial vertical with described air inlet flue, the injection direction of the described spray arm parallel with described air inlet flue axial is the axial vertical direction of described sprinkling gas flue, and the injection direction of the described spray arm vertical with described air inlet flue axial is the axially parallel of described air inlet flue and along the flue gas direction.
Be provided with some dividing plates parallel in the described housing with axis, by described dividing plate the corresponding space in the housing is separated into described axial flow passage, described each dividing plate and described each axial flow passage are that symmetry axis evenly distributes along circumference with the axis of housing, the upper end of described each axial flow passage is uncovered, connects described catalytic reaction chamber.
The ammonia that system ammonia equipment produces sprays grid by described ammonia and is injected in described spray ammonia chamber or the described air inlet flue, be suitable flow by described flow-control valve regulation ammonia flow, flow-control module on the described flow control valve can receive and transmit the flow and/or the concentration information of described flow sensor and/or concentration sensor collection, and control the aperture size of described flow control valve, thereby control ammonia spraying amount by the control circuit on it.The ammonia that flows out from described flow control valve system ammonia equipment dilutes through described ammonia air mixer, and the concentration of ammonia is controlled at below 5%, the concentration of dilution ammonia be in order to ensure the concentration of ammonia avoid explosive range (LEL:16%, HEL:25%).For the temperature maintenance that makes air more than the liquefaction point of ammonia, can air preheater be set at the air intake place of described ammonia air mixer.Ammonia after the dilution enters in the female pipe of described spray of described ammonia injection grid, pressure sensor on the described degree adjustment valve or concentration sensor collection ammonia pressure or concentration herein, and control the aperture size of described degree adjustment valve by connecting thereon control circuit, prevent ammonia generation bias current or ammonia skewness, ammonia in the described spray arm is reached evenly as far as possible, reduce amount of ammonia slip simultaneously.
The ammonia air gas mixture that described ammonia injection grid will be spared after the pressure is ejected in described spray ammonia chamber or the air inlet flue, ammonia and Air mixing gas are fully mixed with waste gas in the described flue, and described ammonia sprays grid also can be adopted except that adopting described mode and be fit to the device that gas sprays arbitrarily.
Mist fully contacts by pore on the described regenerative block and described regenerative block and carries out heat exchange, to reach the purpose of intensification, the pore that passes then on the described catalysis piece fully contacts with catalyst on the described catalysis piece, in the indoor redox reaction of carrying out of described catalytic reaction, when mist passes through, NH
3, NO
XAnd O
2Under the effect of catalytic reaction piece, carry out following denitration reaction:
4NO+4NH
3+O
2→4N
2+6H
2O (1)
2NO
2+4NH
3+O
2→3N
2+6H
2O (2)
6NO
2+8NH
3→7N
2+12H
2O (3)
Discharge by the described flue of giving vent to anger through the gas behind the denitration reaction.
Claims (10)
1. reproducible heat accumulating type selective catalytic reduction denitration device, it is characterized in that being provided with in its housing the catalytic bed and the accumulation of heat bed that distribute up and down, the zone at described catalytic bed and accumulation of heat bed place is separated into some axial flow passages equably, be provided with below described each axial flow passage and can make the equally distributed distribution device in gas-fluid of question response gas, it below the described distribution device in gas-fluid spray ammonia chamber, the indoor ammonia injection grid that is used to spray ammonia that is provided with of described spray ammonia, described spray ammonia chamber is provided with air inlet flue interface, be to be used for the catalytic reaction chamber that reacting gas fully reacts above the described catalytic bed, described catalytic reaction chamber is provided with the flue interface of giving vent to anger, the import that described ammonia sprays grid connects the ammonia outlet of making ammonia equipment, and its connecting pipe is provided with spray ammonia control valve and ammonia air mixer.
2. reproducible heat accumulating type selective catalytic reduction denitration device as claimed in claim 1, it is characterized in that described accumulation of heat bed is formed by some regenerative block layering piles, the whole cross section that is covered with described gas channel, described regenerative block adopts the material of high heat storage performance to make, and is provided with the hole that supplied gas is passed.
3. reproducible heat accumulating type selective catalytic reduction denitration device as claimed in claim 2 is characterized in that being provided with the fixed support that is used for fixing the movable frame of laying each layer regenerative block and is used to support these movable frames.
4. reproducible heat accumulating type selective catalytic reduction denitration device as claimed in claim 1, it is characterized in that described catalytic bed is formed by some catalysis piece layering piles, the whole cross section that is covered with described gas channel, described catalysis piece is provided with the hole that supplied gas is passed, and the surfaces externally and internally of described catalysis piece all scribbles high performance catalyst or described catalysis piece is made by the material that comprises catalyst.
5. reproducible heat accumulating type selective catalytic reduction denitration device as claimed in claim 4 is characterized in that being provided with and is used for fixing the movable frame of laying each layer catalysis piece and the fixed support that is used to support these movable frames.
6. reproducible heat accumulating type selective catalytic reduction denitration device as claimed in claim 1, the cross section that it is characterized in that described housing is rounded, described distribution device in gas-fluid is in the form of annular discs, be provided with some alternate breach, its axis is overlapping with the axis of described housing, its lower end connects transmission device by rotating shaft, and described transmission device is provided with drive motors.
7. reproducible heat accumulating type selective catalytic reduction denitration device as claimed in claim 1, it is characterized in that described ammonia sprays grid and comprises the female pipe of spray and one or more spray arm, described spray arm connects the female pipe of described spray, described spray arm is provided with the plurality of nozzles hole, the inlet end of the female pipe of described spray is arranged on outside the described housing, connects system ammonia equipment.
8. reproducible heat accumulating type selective catalytic reduction denitration device as claimed in claim 7, it is characterized in that described spray arm is provided with degree adjustment valve, described degree adjustment valve is furnished with the control circuit that is used to control its aperture size, and described control circuit is connected with the flow sensor that is used to gather the pressure sensor of gas pressure in the described spray arm or is used to gather gas flow in the described spray arm; The female pipe of described spray is provided with the flow control valve that is used to control ammonia flow, described flow control valve is furnished with the flow-control module that is used to control its aperture, and described flow-control module is connected with the concentration sensor that is used to gather the flow sensor of gas flow in the female pipe of described spray and/or is used to gather ammonia concentration in the female pipe of described spray; The inlet end that described ammonia sprays grid also is provided with the ammonia air mixer that is used for ammonia and air mixing, dilutes ammonia concentration.
9. reproducible heat accumulating type selective catalytic reduction denitration device as claimed in claim 8, the quantity that it is characterized in that described spray arm is a plurality of, be distributed in the both sides of the female pipe of described spray, the employing welding manner connects or connects by flange between the female pipe of described spray arm and described spray.
10. as claim 1,2,3,4,5,6,7,8 or 9 described reproducible heat accumulating type selective catalytic reduction denitration devices, it is characterized in that being provided with in the described housing some dividing plates parallel with axis, by described dividing plate the corresponding space in the housing is separated into described axial flow passage, described each dividing plate and described each axial flow passage are that symmetry axis evenly distributes along circumference with the axis of housing, the upper end of described each axial flow passage is uncovered, connects described catalytic reaction chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201088781U CN201534059U (en) | 2009-06-12 | 2009-06-12 | Renewable heat-accumulating type selective catalytic reduction denitration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201088781U CN201534059U (en) | 2009-06-12 | 2009-06-12 | Renewable heat-accumulating type selective catalytic reduction denitration device |
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|---|---|
| CN201534059U true CN201534059U (en) | 2010-07-28 |
Family
ID=42533845
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| CN2009201088781U Expired - Lifetime CN201534059U (en) | 2009-06-12 | 2009-06-12 | Renewable heat-accumulating type selective catalytic reduction denitration device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007751A (en) * | 2012-12-21 | 2013-04-03 | 江苏科行环境工程技术有限公司 | Process system utilizing preheated air to achieve flue gas denitration |
| CN104772039A (en) * | 2015-04-08 | 2015-07-15 | 北京华泰焦化工程技术有限公司 | Coke oven combustion exhaust denitration system and coke oven combustion exhaust denitration method |
| CN105344244A (en) * | 2015-11-04 | 2016-02-24 | 张玉伟 | Circulatory motion catalysis bed for flue gas denitration |
| CN108295656A (en) * | 2018-03-09 | 2018-07-20 | 上海电力学院 | A kind of efficient catalytic denitrification apparatus of phase-change temperature control |
| CN108325385A (en) * | 2018-04-18 | 2018-07-27 | 中冶京诚工程技术有限公司 | Increasing low temperature SCR catalyst activity and suppressing by-product N2SCR reactor of O |
-
2009
- 2009-06-12 CN CN2009201088781U patent/CN201534059U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007751A (en) * | 2012-12-21 | 2013-04-03 | 江苏科行环境工程技术有限公司 | Process system utilizing preheated air to achieve flue gas denitration |
| CN104772039A (en) * | 2015-04-08 | 2015-07-15 | 北京华泰焦化工程技术有限公司 | Coke oven combustion exhaust denitration system and coke oven combustion exhaust denitration method |
| CN104772039B (en) * | 2015-04-08 | 2017-12-05 | 北京华泰焦化工程技术有限公司 | A kind of coke oven combustion exhaust gas denitration system and method |
| CN105344244A (en) * | 2015-11-04 | 2016-02-24 | 张玉伟 | Circulatory motion catalysis bed for flue gas denitration |
| CN105344244B (en) * | 2015-11-04 | 2017-08-01 | 张玉伟 | A kind of denitrating flue gas gyration catalytic bed |
| CN108295656A (en) * | 2018-03-09 | 2018-07-20 | 上海电力学院 | A kind of efficient catalytic denitrification apparatus of phase-change temperature control |
| CN108295656B (en) * | 2018-03-09 | 2023-09-26 | 上海电力学院 | Phase-change temperature-control efficient catalytic denitration device |
| CN108325385A (en) * | 2018-04-18 | 2018-07-27 | 中冶京诚工程技术有限公司 | Increasing low temperature SCR catalyst activity and suppressing by-product N2SCR reactor of O |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100070 Building No. 3, block 188, South Fourth Ring Road, Fengtai District, Beijing Patentee after: Beijing CEC environmental protection Limited by Share Ltd Address before: 100070 Building No. 3, block 188, South Fourth Ring Road, Fengtai District, Beijing Patentee before: Beijing CEC Environment Engineering Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100728 |