CN105944563A - Case-type pulse ash blowing system for cement kiln SCR denitration and use method thereof - Google Patents
Case-type pulse ash blowing system for cement kiln SCR denitration and use method thereof Download PDFInfo
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- CN105944563A CN105944563A CN201610109278.1A CN201610109278A CN105944563A CN 105944563 A CN105944563 A CN 105944563A CN 201610109278 A CN201610109278 A CN 201610109278A CN 105944563 A CN105944563 A CN 105944563A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a case-type pulse ash blowing system for cement kiln SCR denitration and a use method thereof. The case-type pulse ash blowing system comprises a compressed air system which is connected to an air storage bag. A welded steel pipe is connected to the air storage bag. One end of the welded steel pipe is arranged in the air storage bag and is provided with an immersed pulse electromagnetic valve. The other end of the welded steel pipe is provided with a blowing nozzle which is inclinedly towards to a catalyst bed layer at the top of an SCR reactor. The invention provides the compressed air case-type pulse ash blowing system for the SCR reactor in a cement production line, wherein compressed air generated through an air compressor passes through a cold dryer and a heater and then is intermittently blown above the catalyst in the SCR reactor under the control by the immersed pulse electromagnetic valve, so that accumulated ash on the surface of the catalyst is cleaned by means of instantaneous air vibration generated from the compressed air, thereby ensuring activity and service life of the catalyst. Furthermore, the system enables flue gas to smoothly enter the catalyst bed layer to carry out a catalytic denitration reaction.
Description
Technical field:
The present invention relates to cement kiln SCR denitration system, particularly relate to a kind of for cement kiln SCR denitration box pulse formula soot blower system and using method thereof.
Background technology:
Along with the requirement increasingly stringent to cement producing line discharged nitrous oxides, selective catalytic reduction (SCR) is used to carry out the main direction of studying that denitration is cement producing line denitration.Owing to containing dust in cement kiln flue gas, when flue gas is by beds, dust can be deposited on catalyst surface, blocking catalyst duct, reduces denitration efficiency.
In order to prevent dust deposit on catalyst layer, improve denitration efficiency, soot blower need to be installed on every layer of catalyst.Conventional soot blower has acoustic wave ash ejector steam sootblower and compressed air soot-blowing device.Owing to the flue gas viscosity in cement kiln flue gas is strong, the easy slagging scorification of catalyst layer surface, in engineering practice, prove that acoustic wave ash ejector soot blowing intensity is the highest, and using effect is unstable, is not suitable for cement kiln denitration soot blower system.Steam sootblower adds smoke moisture, and accelerator activator inactivates, and affects catalyst service life.
Summary of the invention:
In order to make up prior art problem, it is an object of the invention to provide a kind of for cement kiln SCR denitration box pulse formula soot blower system and using method thereof, it is possible to apply in cement producing line SCR denitration system reactor, deashing work can be automatically performed.
Technical scheme is as follows:
For cement kiln SCR denitration box pulse formula soot blower system, it is characterized in that, including air compressor machine, air compressor machine is sequentially connected with cooling driers, filter, heater, air accumulator by admission line, air accumulator outlet pipe is connected with some arms from top to bottom in turn, and every tube end connects gas storage bag, and connection is wrapped in gas storage two welded still pipes, welded still pipe one end is positioned at gas storage bag and is provided with submerged impulse electromagnetic valve, and the other end end of welded still pipe is provided with winding-up mouth；
The side of gas storage bag is provided with SCR reactor casing, and SCR reactor casing upper and lower side is respectively equipped with flue gas inlet pipe, flue gas goes out pipe, and SCR reactor casing is provided with multiple SCR reactor from top to bottom；
Described welded still pipe extend in SCR reactor casing from the left and right sides respectively, and winding-up mouth tilts the beds towards SCR reactor head, has certain distance with SCR catalyst.
Described for cement kiln SCR denitration box pulse formula soot blower system, it is characterised in that pressure maintaining valve to be installed on the escape pipe of described air accumulator, some arms are equipped with pressure transducer.
Described for cement kiln SCR denitration box pulse formula soot blower system; it is characterized in that; described pressure transducer automatically controls the bound protection of compressed air line, and a whole set of cooling driers of soot blower system, pressure transducer, heater etc. are controlled by the pid control module of PID automatic control system.
A kind of using method for cement kiln SCR denitration box pulse formula soot blower system, it is characterised in that comprise the steps:
Step A, the outside all pipelines of SCR reactor and air accumulator rock wool and galvanized iron sheet do isothermal holding；
Step B, air compressor machine produces compressed air, and the compressed air pressure that air compressor machine provides must not be less than 0.5Pa；
Step C, compressed air first passes through cooling driers and removes moisture, is then passed through filter, is heated to 148 ~ 152 DEG C finally by pipeline heater, and the compressed air after heating is temporarily stored within air accumulator；
Step D, the gas storage bag that air accumulator is arranged with each catalyst layer by pressure maintaining valve is connected, and in gas storage bag, compressed air pressure is 0.2 ~ 0.3MPa；
Step E, the submerged impulse electromagnetic valve that gas storage is wrapped is normally closed structure, and the submerged impulse electromagnetic valve that each catalyst layer is arranged is opened in turn, and a length of 0.1 ~ 0.15s during each action, each electromagnetic valve opening interval is 4 minutes；
Step F, compressed air sprays into SCR inside reactor by welded still pipe and winding-up mouth, will be attached to the dust separation on catalyst layer with the form of instantaneous gas shock, winding-up mouth is diagonally downward towards the beds of SCR reactor head so that compressed air is directly jetted to catalyst surface.
The invention have the advantage that
The present invention is that the SCR denitration reactor of cement producing line provides a set of compressed air box impulse soot blowing system, after the compressed air that air compressor machine produces is by cooling driers and heater, controlled by submerged impulse electromagnetic valve, be interrupted by injection tube winding-up catalyst in SCR reactor above, the instantaneous gas shock utilizing compressed air to produce removes the dust stratification of catalyst surface, present invention ensures that catalyst activity and life-span, and can guarantee that in flue gas smooth and easy entrance catalytic plate and carry out catalytic denitration reaction.
Accompanying drawing illustrates:
Fig. 1 is the cement kiln SCR denitration box pulse formula soot blower system flow chart of the present invention.
Fig. 2 is the cement kiln SCR denitration box pulse formula soot blowing layer top view layout of the present invention.
Fig. 3 is the cement kiln SCR denitration box pulse soot blower system schematic diagram of the present invention.
Detailed description of the invention:
See accompanying drawing:
For cement kiln SCR denitration box pulse formula soot blower system, including air compressor machine 1, air compressor machine 1 is sequentially connected with cooling driers 2, filter 3, heater 4, air accumulator 5 by admission line, air accumulator 5 outlet pipe 17 is connected with some arms 18 from top to bottom in turn, every arm 18 end connects gas storage bag 8, connect on gas storage bag 8 and have two welded still pipes 12, welded still pipe 12 one end is positioned at gas storage bag and is provided with submerged impulse electromagnetic valve 9, and the other end end of welded still pipe is provided with winding-up mouth 11；
The side of gas storage bag 8 is provided with SCR reactor casing 13, and SCR reactor casing 13 upper and lower side is respectively equipped with flue gas inlet pipe 14, flue gas goes out pipe 15, and SCR reactor casing 13 is provided with multiple SCR reactor 16 from top to bottom；
Welded still pipe 12 extend in SCR reactor casing 13 from the left and right sides respectively, and winding-up mouth 1 tilts the beds towards SCR reactor 16 top, has certain distance with SCR catalyst.
Pressure maintaining valve 6 is installed on the escape pipe of air accumulator, some arms 18 are equipped with pressure transducer 7.
Pressure transducer 7 automatically controls the bound protection of compressed air line, and a whole set of cooling driers of soot blower system, pressure transducer, heater etc. are controlled by the pid control module of PID automatic control system.
A kind of using method for cement kiln SCR denitration box pulse formula soot blower system, comprises the steps:
Step A, the outside all pipelines of SCR reactor 16 and air accumulator 5 rock wool and galvanized iron sheet do isothermal holding；
Step B, air compressor machine 1 produces compressed air, and the compressed air pressure that air compressor machine 1 provides must not be less than 0.5Pa；
Step C, compressed air first passes through cooling driers and removes moisture, is then passed through filter 3, is heated to 148 ~ 152 DEG C finally by pipeline heater 4, and the compressed air after heating is temporarily stored within air accumulator 5；
Step D, the gas storage bag 8 that air accumulator 5 is arranged with each catalyst layer by pressure maintaining valve is connected, and the inner compressed air pressure of gas storage bag 8 is 0.2 ~ 0.3MPa；
Step E, the submerged impulse electromagnetic valve 9 on gas storage bag 8 is normally closed structure, and the submerged impulse electromagnetic valve 9 that each catalyst layer is arranged is opened in turn, and a length of 0.1 ~ 0.15s during each action, each submerged impulse electromagnetic valve 9 opening interval is 4 minutes；
Step F, it is internal that compressed air sprays into SCR reactor 16 by welded still pipe 12 and winding-up mouth 11, the dust separation on catalyst layer is will be attached to the form of instantaneous gas shock, winding-up mouth is diagonally downward towards the beds of SCR reactor head, compressed air is directly jetted to catalyst surface, and winding-up mouth 11 has the height of 500mm apart from catalyst upper surface.
Soot blower system of the present invention is automatically controlled by PID, and pid control module is after soot blower system transmits soot blowing signal, and soot blower system starts soot blowing work, and submerged impulse electromagnetic valve 9 is opened, to the SCR inside reactor winding-up duration compressed air of 0.1 ~ 0.15 second.
Claims (4)
1. one kind is used for cement kiln SCR denitration box pulse formula soot blower system, it is characterized in that, including air compressor machine, air compressor machine is sequentially connected with cooling driers, filter, heater, air accumulator by admission line, air accumulator outlet pipe is connected with some arms from top to bottom in turn, and every tube end connects gas storage bag, and connection is wrapped in gas storage two welded still pipes, welded still pipe one end is positioned at gas storage bag and is provided with submerged impulse electromagnetic valve, and the other end end of welded still pipe is provided with winding-up mouth；
The side of gas storage bag is provided with SCR reactor casing, and SCR reactor casing upper and lower side is respectively equipped with flue gas inlet pipe, flue gas goes out pipe, and SCR reactor casing is provided with multiple SCR reactor from top to bottom；
Described welded still pipe extend in SCR reactor casing from the left and right sides respectively, and winding-up mouth tilts the beds towards SCR reactor head, has certain distance with SCR catalyst.
The most according to claim 1 for cement kiln SCR denitration box pulse formula soot blower system, it is characterised in that pressure maintaining valve to be installed on the escape pipe of described air accumulator, some arms are equipped with pressure transducer.
The most according to claim 1 for cement kiln SCR denitration box pulse formula soot blower system; it is characterized in that; described pressure transducer automatically controls the bound protection of compressed air line, and a whole set of cooling driers of soot blower system, pressure transducer, heater etc. are controlled by the pid control module of PID automatic control system.
4. the using method for cement kiln SCR denitration box pulse formula soot blower system, it is characterised in that comprise the steps:
Step A, the outside all pipelines of SCR reactor and air accumulator rock wool and galvanized iron sheet do isothermal holding；
Step B, air compressor machine produces compressed air, and the compressed air pressure that air compressor machine provides must not be less than 0.5Pa；
Step C, compressed air first passes through cooling driers and removes moisture, is then passed through filter, is heated to 148 ~ 152 DEG C finally by pipeline heater, and the compressed air after heating is temporarily stored within air accumulator；
Step D, the gas storage bag that air accumulator is arranged with each catalyst layer by pressure maintaining valve is connected, and in gas storage bag, compressed air pressure is 0.2 ~ 0.3MPa；
Step E, the submerged impulse electromagnetic valve that gas storage is wrapped is normally closed structure, and the submerged impulse electromagnetic valve that each catalyst layer is arranged is opened in turn, and a length of 0.1 ~ 0.15s during each action, each electromagnetic valve opening interval is 4 minutes；
Step F, compressed air sprays into SCR inside reactor by welded still pipe and winding-up mouth, will be attached to the dust separation on catalyst layer with the form of instantaneous gas shock, winding-up mouth is diagonally downward towards the beds of SCR reactor head so that compressed air is directly jetted to catalyst surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610109278.1A CN105944563A (en) | 2016-02-26 | 2016-02-26 | Case-type pulse ash blowing system for cement kiln SCR denitration and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610109278.1A CN105944563A (en) | 2016-02-26 | 2016-02-26 | Case-type pulse ash blowing system for cement kiln SCR denitration and use method thereof |
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| CN105944563A true CN105944563A (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610109278.1A Pending CN105944563A (en) | 2016-02-26 | 2016-02-26 | Case-type pulse ash blowing system for cement kiln SCR denitration and use method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623257A (en) * | 2016-12-28 | 2017-05-10 | 沪东重机有限公司 | Soot blowing system for SCR reactor |
| CN107952363A (en) * | 2017-10-17 | 2018-04-24 | 上海交通大学 | A kind of low-temperature flue gas RT-SCR heat-storage catalytics reduction denitrating system and method |
| CN109396114A (en) * | 2018-12-13 | 2019-03-01 | 北京国电龙源环保工程有限公司 | The intelligent cleaning system and its method for cleaning of SCR catalyst surface area ash |
| CN112827355A (en) * | 2020-12-30 | 2021-05-25 | 启源（西安）大荣环保科技有限公司 | Corrugated catalyst module capable of blowing soot online |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202893190U (en) * | 2012-11-21 | 2013-04-24 | 江苏中建材环保研究院有限公司 | Novel high-efficiency SCR (selective catalytic reduction) denitration catalyst soot blower |
| CN105169940A (en) * | 2015-09-14 | 2015-12-23 | 合肥水泥研究设计院 | Ash blowing system for SCR (Selective Catalytic Reduction) denitration reactor of cement kiln |
| CN205517270U (en) * | 2016-02-26 | 2016-08-31 | 合肥水泥研究设计院 | Be used for box pulsed soot blower system of cement kiln SCR denitration |
-
2016
- 2016-02-26 CN CN201610109278.1A patent/CN105944563A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202893190U (en) * | 2012-11-21 | 2013-04-24 | 江苏中建材环保研究院有限公司 | Novel high-efficiency SCR (selective catalytic reduction) denitration catalyst soot blower |
| CN105169940A (en) * | 2015-09-14 | 2015-12-23 | 合肥水泥研究设计院 | Ash blowing system for SCR (Selective Catalytic Reduction) denitration reactor of cement kiln |
| CN205517270U (en) * | 2016-02-26 | 2016-08-31 | 合肥水泥研究设计院 | Be used for box pulsed soot blower system of cement kiln SCR denitration |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623257A (en) * | 2016-12-28 | 2017-05-10 | 沪东重机有限公司 | Soot blowing system for SCR reactor |
| CN107952363A (en) * | 2017-10-17 | 2018-04-24 | 上海交通大学 | A kind of low-temperature flue gas RT-SCR heat-storage catalytics reduction denitrating system and method |
| CN109396114A (en) * | 2018-12-13 | 2019-03-01 | 北京国电龙源环保工程有限公司 | The intelligent cleaning system and its method for cleaning of SCR catalyst surface area ash |
| CN109396114B (en) * | 2018-12-13 | 2023-05-23 | 国能龙源环保有限公司 | Intelligent cleaning system and cleaning method for SCR catalyst surface area ash |
| CN112827355A (en) * | 2020-12-30 | 2021-05-25 | 启源（西安）大荣环保科技有限公司 | Corrugated catalyst module capable of blowing soot online |
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Application publication date: 20160921 |
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