CN204543994U - Coal-powder boiler denitrification apparatus - Google Patents
Coal-powder boiler denitrification apparatus Download PDFInfo
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- CN204543994U CN204543994U CN201520022731.6U CN201520022731U CN204543994U CN 204543994 U CN204543994 U CN 204543994U CN 201520022731 U CN201520022731 U CN 201520022731U CN 204543994 U CN204543994 U CN 204543994U
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- Prior art keywords
- coal
- spray gun
- powder boiler
- denitrification apparatus
- reducing agent
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- 239000000843 powder Substances 0.000 title claims abstract description 107
- 239000007921 spray Substances 0.000 claims abstract description 107
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000004071 soot Substances 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 3
- 239000012895 dilution Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000006722 reduction reaction Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000010531 catalytic reduction reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- YPJKMVATUPSWOH-UHFFFAOYSA-N nitrooxidanyl Chemical compound [O][N+]([O-])=O YPJKMVATUPSWOH-UHFFFAOYSA-N 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides a kind of coal-powder boiler denitrification apparatus, comprises water tank, reducing agent feeding assembly, Three-in-one controller, spray gun assembly and reduction reactor.Spray gun assembly comprises the first spray gun being arranged at coal-powder boiler secondary air channel top, second spray gun in the Zhe Yan district being arranged at coal-powder boiler and the 3rd spray gun that is arranged on the horizontal flue of coal-powder boiler.Can realize controlling separately to spray guns different in spray gun assembly by Three-in-one controller.During coal-powder boiler underrun, open the first spray gun, effectively solve and do not reach SCR reaction temperature because coal-powder boiler load is low, and can not the problem of denitration.When coal-powder boiler heavy-duty service, open the second spray gun and the 3rd spray gun.When coal-powder boiler moderate-duty service, open the 3rd spray gun, thus effectively improve the utilization rate of reducing agent.Therefore, above-mentioned coal-powder boiler denitrification apparatus can adapt to different coal-powder boiler loads, realizes different classification denitrification process.
Description
Technical field
The utility model relates to environmental protection equipment, particularly relates to a kind of coal-powder boiler denitrification apparatus.
Background technology
Coal-powder boiler dry method flue gas denitration technology mainly comprises SNCR (selective non-catalytic reduction, SNCR) and SCR (selective catalytic reduction, SCR).Wherein, SNCR is used for spraying into reducing agent to DEG C high-temperature area of 800-1200 in burner hearth, is nitrogen and water the reducing nitrate radical in flue gas.SCR is used for spraying into reducing agent in 280-420 DEG C of region, and increasing hydrogen-catalyst reactor by the nitrate anion catalytic reduction in flue gas by coal-powder boiler afterbody is nitrogen and water.
At present, in coal-powder boiler flue gas nitrate anion generation concentration along with different coal-powder boiler load fluctuations larger.When coal-powder boiler internal loading is lower than certain level, do not reach the temperature of SCR reaction, causing cannot denitration.And when the load in coal-powder boiler is higher than certain level, then a large amount of reducing agents can be caused to fail participate in out of stock reflection and waste, thus cost is raised.
Utility model content
Based on this, be necessary that providing a kind of according to the load difference change of coal-powder boiler, can realize the coal-powder boiler denitrification apparatus of different operating process.
A kind of coal-powder boiler denitrification apparatus, for carrying out denitration process to the gas in coal-powder boiler, described coal-powder boiler denitrification apparatus comprises:
Water tank;
Reducing agent feeding assembly;
Three-in-one controller, is communicated with described water tank and described reducing agent feeding assembly, to dilute reducing agent;
Spray gun assembly, be communicated with described Three-in-one controller, reducing agent is sprayed into described coal-powder boiler, described spray gun assembly comprises the first spray gun, the second spray gun and the 3rd spray gun, described first spray gun is arranged at described coal-powder boiler secondary air channel top, described second spray gun is arranged at the Zhe Yan district of described coal-powder boiler, and described 3rd spray gun is arranged on the horizontal flue of described coal-powder boiler;
Reduction reactor is the tubular structure of one end open, the outlet of described reduction reactor and described coal-powder boiler, and is provided with catalyst layer at the middle part of described reduction reactor;
Wherein, described Three-in-one controller can control described first spray gun, described second spray gun and described 3rd spray gun and individually sprays reducing agent.
Described in an embodiment, water tank is communicated with described Three-in-one controller by described dilution water pump wherein.
Described in an embodiment, reducing agent feeding assembly comprises wherein:
Dissolving tank, for storing reducing agent;
Low-pressure steam device, is communicated with described dissolving tank, by the agent of steam dissolving and reducing;
Storage tank, is communicated with described low-pressure steam device, and is communicated with dissolving tank, for storing the reducing agent after dissolving by unloading pump;
Supply pump, is communicated with described storage tank, and described storage tank is communicated with described Three-in-one controller by described supply pump.
Described in an embodiment, the top of dissolving tank is also provided with agitator wherein.
First spray gun described in an embodiment is arranged in left and right, rear three sides of burner hearth of described coal-powder boiler secondary air channel wherein, described second spray gun is arranged in left and right, rear three sides of burner hearth in described coal-powder boiler Zhe Yan district, and described 3rd spray gun is arranged in the both sides, region of the horizontal flue of described coal-powder boiler.
First spray gun described in an embodiment, described second spray gun and described 3rd spray gun are all provided with four at the one-sided of described coal-powder boiler wherein, and both sides amount to eight.
The top of catalyst layer described in an embodiment, is also provided with soot blower wherein.
Described in an embodiment, the entrance of reduction reactor is also provided with rectifier wherein.
Also comprise economizer in an embodiment wherein, described economizer is the U-shaped tubular structure of both ends open, and the exhaust pass of described economizer is connected with the gas approach of described reduction reactor.
The load sensor be arranged in described coal-powder boiler is also comprised wherein in an embodiment, described load sensor is connected with described Three-in-one controller, when described coal-powder boiler internal loading is lower than lowest threshold, described Three-in-one controller controls described first spray gun and works independently, when described coal-powder boiler internal loading is higher than most high threshold, described Three-in-one controller controls described second spray gun and described 3rd spray gun work, when described coal-powder boiler internal loading is between lowest threshold and most high threshold, described Three-in-one controller controls described 3rd spray gun and works independently.
Above-mentioned coal-powder boiler denitrification apparatus, can realize controlling separately to spray guns different in spray gun assembly by Three-in-one controller.During coal-powder boiler underrun, open the first spray gun, effectively solve and do not reach SCR reaction temperature because coal-powder boiler load is low, and can not the problem of denitration.When coal-powder boiler heavy-duty service, open the second spray gun and the 3rd spray gun.When coal-powder boiler moderate-duty service, open the 3rd spray gun, thus effectively improve the utilization rate of reducing agent.Therefore, above-mentioned coal-powder boiler denitrification apparatus can adapt to different coal-powder boiler loads, realizes different classification denitrification process.
Accompanying drawing explanation
Fig. 1 is the structural representation of coal-powder boiler denitrification apparatus in the utility model preferred embodiment;
Fig. 2 is the A-A generalized section of the denitrification apparatus of coal-powder boiler shown in Fig. 1;
Fig. 3 is the B-B generalized section of the denitrification apparatus of coal-powder boiler shown in Fig. 1.
Detailed description of the invention
For the ease of understanding the utility model, below with reference to relevant drawings, the utility model is described more fully.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present utility model more comprehensively thorough.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in description of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
Coal-powder boiler denitrification apparatus 100 is for carrying out denitration process to coal-powder boiler 20.Coal-powder boiler 20 is the hollow cylindrical configuration of one end open.Be provided with secondary air channel 21 in coal-powder boiler 20 one end bottom it, one end bending of coal-powder boiler 20, kink forms the Zhe Yan district of coal-powder boiler 20.Along Zhe Yan district to the region of outlet, it is the horizontal flue of coal-powder boiler 20.
Refer to Fig. 1, the coal-powder boiler denitrification apparatus 100 in the utility model preferred embodiment comprises water tank 110, reducing agent feeding assembly 120, Three-in-one controller 130, spray gun assembly 140 and reduction reactor 150.
Water tank 110, for water storage, can be made up of materials such as stainless steels.
Reducing agent feeding assembly 120 is for supplying reducing agent.Specifically in the present embodiment, reducing agent is urea.
Three-in-one controller 130 is communicated with water tank 110 and reducing agent feeding assembly 120, to dilute reducing agent.Reducing agent inputs to Three-in-one controller 130.Wherein, Three-in-one controller 130 comprises metering, mixing, allocation component, and reducing agent dilutes by the water utilizing water tank to input.
In the present embodiment, water tank 110 is communicated with Three-in-one controller 130 by dilution water pump 112.Further, reducing agent feeding assembly 120 comprises dissolving tank 121, low-pressure steam device 122, storage tank 123, unloading pump 124 and supply pump 125.
Dissolving tank 121 is for storing reducing agent.Low-pressure steam device 122 is communicated with dissolving tank 121, by the agent of steam dissolving and reducing.Storage tank 123 is communicated with low-pressure steam device 122, and is communicated with dissolving tank 121 by unloading pump 124, for storing the reducing agent after dissolving.Supply pump 125 is communicated with storage tank 123.Storage tank 123 is communicated with Three-in-one controller 130 by supply pump 125.
Specifically in an embodiment, the top of dissolving tank 121 is also provided with agitator 126.Agitator 126 stirs, can the course of dissolution of Accelerating reduction agent.
Spray gun assembly 140 is communicated with Three-in-one controller 130, to spray reducing agent into described coal-powder boiler.Concrete, spray gun assembly 140 comprises the first spray gun 141, second spray gun 143 and the 3rd spray gun 145.First spray gun 141 is arranged at coal-powder boiler 20 secondary air channel top, and the second spray gun 143 is arranged at the Zhe Yan district of coal-powder boiler 20, and the 3rd spray gun is arranged on the horizontal flue of coal-powder boiler 20.
See also Fig. 2 and Fig. 3, in the present embodiment, the first spray gun 141 is arranged in left and right, rear three sides of certain area burner hearth, coal-powder boiler 20 secondary air channel top, is one-sidedly provided with 4 twin spray guns, and both sides amount to 8 twin spray guns.Second spray gun 143 is arranged in left and right, rear three sides of burner hearth in coal-powder boiler 20 Zhe Yan district, is one-sidedly provided with 4 twin spray guns, and both sides amount to 8 twin spray guns.3rd spray gun 145 is arranged in both sides, coal-powder boiler 20 horizontal flue region, is one-sidedly provided with 4 twin spray guns, and both sides amount to 8 twin spray guns.。
Therefore, injection of reducing agent is fashionable, can from the gas and vapor permeation multiple directions and coal-powder boiler 20, thus reaction can be made more thorough, and improve the service efficiency of reducing agent.
Reduction reactor 150 is the tubular structure of one end open.The outlet of reduction reactor 150 and coal-powder boiler 20.Specifically in the present embodiment, also comprise economizer 160, economizer 160 is the U-shaped tubular structure of both ends open, and the exhaust pass of economizer 160 is connected with the gas approach of reduction reactor 250.The middle part of reduction reactor 150 is provided with catalyst layer 151.Wherein, in coal-powder boiler 20, burning produce NOx root enter into reduction reactor 150 with gas, and on catalyst layer 151 catalyst effect under be reduced agent reduction.
In the present embodiment, the top of catalyst layer 151, is also provided with soot blower 152.The dust being deposited on catalyst layer 151 surface can blow away by soot blower 152, and being convenient to catalyst fully can contact with gas, thus makes the utilization rate of catalyst higher.
Further, the entrance of reduction reactor 150 is also provided with rectifier 153.Rectifier 153 can adjust airflow direction, thus is convenient to gas by catalyst layer 151, and then redox reaction occurs.
Wherein, Three-in-one controller 130 can control the first spray gun 141, second spray gun 143 and the 3rd spray gun 145 individually sprays reducing agent.That is, under the effect of Three-in-one controller 130, in the first spray gun 141, second spray gun 143 and the 3rd spray gun 145, the combination of any one or two and three spray reducing agent together in coal-powder boiler 20.Therefore, can the reducing agent that zones of different realizes distinguishing be sprayed.
When coal-powder boiler underrun, the first spray gun 141 can be opened, thus effectively solve and do not reach SCR reaction temperature because coal-powder boiler load is low, and can not the problem of denitration.When coal-powder boiler heavy-duty service, open the second spray gun 143 and the 3rd spray gun 145.When coal-powder boiler moderate-duty service, open the 3rd spray gun 145, thus effectively improve the utilization rate of reducing agent.
In the present embodiment, also comprise the load sensor (not shown) be arranged in coal-powder boiler 20, load sensor is connected with Three-in-one controller 130, when coal-powder boiler internal loading is lower than lowest threshold, Three-in-one controller 130 controls the first spray gun 141 and works independently, when coal-powder boiler internal loading is higher than most high threshold, Three-in-one controller 130 controls institute's the second spray gun 143 and the 3rd spray gun 145 works, when coal-powder boiler internal loading is between lowest threshold and most high threshold, Three-in-one controller 130 controls the 3rd spray gun 145 and works independently.
Concrete, the percentage of evaporation capacity in degree of loading and coal-powder boiler 20.General lowest threshold is 60%, and most high threshold is 90%.Can arrange magnetic valve in Three-in-one controller 130, in spray gun assembly 140, each spray gun passes through solenoid control.Wherein, magnetic valve is electrically connected with load sensor, and the load of machinery systems of detection is changed into the signal of telecommunication by load sensor, and magnetic valve controls the duty of each spray gun in spray gun assembly 140 according to the signal of telecommunication.In addition, also can arrange PLC (PLD) at Three-in-one controller 130, PLC is according to the duty of load sensor and the different spray gun of the programme-control that pre-sets.
Coal-powder boiler denitrification apparatus 100, can realize controlling separately to spray guns different in spray gun assembly 140 by Three-in-one controller 130.During coal-powder boiler underrun, open the first spray gun 141, effectively solve and do not reach SCR reaction temperature because coal-powder boiler load is low, and can not the problem of denitration.When coal-powder boiler heavy-duty service, open the second spray gun 143 and the 3rd spray gun 145.When coal-powder boiler moderate-duty service, open the 3rd spray gun 145, thus effectively improve the utilization rate of reducing agent.Therefore, above-mentioned coal-powder boiler denitrification apparatus 100 can adapt to different coal-powder boiler loads, realizes different classification denitrification process.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. a coal-powder boiler denitrification apparatus, for carrying out denitration process to the gas in coal-powder boiler, is characterized in that, described coal-powder boiler denitrification apparatus comprises:
Water tank;
Reducing agent feeding assembly;
Three-in-one controller, is communicated with described water tank and described reducing agent feeding assembly, to dilute reducing agent;
Spray gun assembly, be communicated with described Three-in-one controller, reducing agent is sprayed into described coal-powder boiler, described spray gun assembly comprises the first spray gun, the second spray gun and the 3rd spray gun, described first spray gun is arranged at described coal-powder boiler secondary air channel top, described second spray gun is arranged at the Zhe Yan district of described coal-powder boiler, and described 3rd spray gun is arranged on the horizontal flue of described coal-powder boiler;
Reduction reactor is the tubular structure of one end open, the outlet of described reduction reactor and described coal-powder boiler, and is provided with catalyst layer at the middle part of described reduction reactor;
Wherein, described Three-in-one controller can control described first spray gun, described second spray gun and described 3rd spray gun and individually sprays reducing agent.
2. coal-powder boiler denitrification apparatus according to claim 1, is characterized in that, described water tank is communicated with described Three-in-one controller by described dilution water pump.
3. coal-powder boiler denitrification apparatus according to claim 1, is characterized in that, described reducing agent feeding assembly comprises:
Dissolving tank, for storing reducing agent;
Low-pressure steam device, is communicated with described dissolving tank, by the agent of steam dissolving and reducing;
Storage tank, is communicated with described low-pressure steam device, and is communicated with dissolving tank, for storing the reducing agent after dissolving by unloading pump;
Supply pump, is communicated with described storage tank, and described storage tank is communicated with described Three-in-one controller by described supply pump.
4. coal-powder boiler denitrification apparatus according to claim 3, is characterized in that, the top of described dissolving tank is also provided with agitator.
5. coal-powder boiler denitrification apparatus according to claim 1, it is characterized in that, described first spray gun is arranged in left and right, rear three sides of burner hearth of described coal-powder boiler secondary air channel, described second spray gun is arranged in left and right, rear three sides of burner hearth in described coal-powder boiler Zhe Yan district, and described 3rd spray gun is arranged in the both sides, region of the horizontal flue of described coal-powder boiler.
6. coal-powder boiler denitrification apparatus according to claim 5, is characterized in that, described first spray gun, described second spray gun and described 3rd spray gun are all provided with four at the one-sided of described coal-powder boiler, and both sides amount to eight.
7. coal-powder boiler denitrification apparatus according to claim 1, is characterized in that, the top of described catalyst layer, is also provided with soot blower.
8. coal-powder boiler denitrification apparatus according to claim 1, is characterized in that, the entrance of described reduction reactor is also provided with rectifier.
9. coal-powder boiler denitrification apparatus according to claim 1, is characterized in that, also comprise economizer, and described economizer is the U-shaped tubular structure of both ends open, and the exhaust pass of described economizer is connected with the gas approach of described reduction reactor.
10. coal-powder boiler denitrification apparatus according to claim 1, it is characterized in that, also comprise the load sensor be arranged in described coal-powder boiler, described load sensor is connected with described Three-in-one controller, when described coal-powder boiler internal loading is lower than lowest threshold, described Three-in-one controller controls described first spray gun and works independently, when described coal-powder boiler internal loading is higher than most high threshold, described Three-in-one controller controls described second spray gun and described 3rd spray gun work, when described coal-powder boiler internal loading is between lowest threshold and most high threshold, described Three-in-one controller controls described 3rd spray gun and works independently.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520022731.6U CN204543994U (en) | 2015-01-14 | 2015-01-14 | Coal-powder boiler denitrification apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520022731.6U CN204543994U (en) | 2015-01-14 | 2015-01-14 | Coal-powder boiler denitrification apparatus |
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| CN204543994U true CN204543994U (en) | 2015-08-12 |
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| CN201520022731.6U Expired - Fee Related CN204543994U (en) | 2015-01-14 | 2015-01-14 | Coal-powder boiler denitrification apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854555A (en) * | 2016-03-28 | 2016-08-17 | 海宁市红宝热电有限公司 | Flue gas treatment system |
| CN108854530A (en) * | 2018-05-23 | 2018-11-23 | 清华大学盐城环境工程技术研发中心 | A kind of wide load SCR denitration device of middle low temperature and method of denitration |
| CN111957202A (en) * | 2020-08-21 | 2020-11-20 | 浙江浙能技术研究院有限公司 | Denitration system suitable for biomass boiler |
-
2015
- 2015-01-14 CN CN201520022731.6U patent/CN204543994U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854555A (en) * | 2016-03-28 | 2016-08-17 | 海宁市红宝热电有限公司 | Flue gas treatment system |
| CN108854530A (en) * | 2018-05-23 | 2018-11-23 | 清华大学盐城环境工程技术研发中心 | A kind of wide load SCR denitration device of middle low temperature and method of denitration |
| CN108854530B (en) * | 2018-05-23 | 2021-07-20 | 清华大学盐城环境工程技术研发中心 | Medium-low temperature wide-load SCR denitration device and denitration method |
| CN111957202A (en) * | 2020-08-21 | 2020-11-20 | 浙江浙能技术研究院有限公司 | Denitration system suitable for biomass boiler |
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Address after: Tongzi high tech Development Zone in Hunan province Changsha Po Road 410000 No. 229 Lugu International Industrial Park A-7 Building No. 408 Patentee after: Changsha Hong Fu green technology Co., Ltd Address before: 1610, room 398, Maira building, 410000 Jinxing Road, West Lake street, Changsha, Hunan, Yuelu District Patentee before: Changsha Hong Fu green technology Co., Ltd |
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Granted publication date: 20150812 Termination date: 20180114 |
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