CN202606021U - Denitration device for circulating fluidized bed boiler - Google Patents
Denitration device for circulating fluidized bed boiler Download PDFInfo
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- CN202606021U CN202606021U CN201220268357.4U CN201220268357U CN202606021U CN 202606021 U CN202606021 U CN 202606021U CN 201220268357 U CN201220268357 U CN 201220268357U CN 202606021 U CN202606021 U CN 202606021U
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- dissolving
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Abstract
The utility model discloses a denitration device for a circulating fluidized bed boiler, comprising a dissolving module, a storage module, a diluting module, a distributing and metering module, an injection module and a compressed air module, wherein the dissolving module is used for preparing urea solution; the storage module is connected with an outlet of the dissolving module and is used for storing prepared urea solution; the diluting module is connected with an outlet of the storage module and is used for diluting the urea solution; the distributing and metering module is connected with an outlet of the diluting module and is used for metering and distributing the diluted urea solution into multiple paths; the injection module consists of a spraying gun connected at the tail end of each path after metering and distribution; and the compressed air module is arranged on each path after metering and distribution and provides atomized air for the spraying gun. The denitration device disclosed by the utility model has the advantages that a reducing agent can be stably fed into high-temperature flue gas according to the measurement, is uniformly mixed with the flue gas to carry out denitration reaction, the retention time at the area of a reaction temperature window is long, and the system is stable, and is high in efficiency, low in consumption and high in automation degree.
Description
Technical field
The utility model belongs to the gas denitrifying technology field, relates in particular to a kind of denitrification apparatus that is used for CFBB.
Background technology
In recent years, China NO
XDischarge capacity rises rapidly along with the quick growth of energy-consuming and vehicle guaranteeding organic quantity.NO
XBecome one of main atmosphere pollution.In view of NO
XAdverse effect and the present NO of thermal power plant to atmospheric environment
XThe severe situation of emission control, country proposes the planning and the requirement of control NOX discharging during " 12 ".New thermal power plant's atmosphere pollutants emission standards (GB 13223-2011) requirement, newly-built fired power generating unit played the NOX discharging on January 1st, 2012 and are lower than 100mg/m
3(6%O
2), generally must go up denitrification apparatus; Active service W flame furnace, recirculating fluidized bed (CFB) unit NO
XDischarging is lower than 200mg/m
3(6%O
2), newly-built unit requirement is also carried out in the key area.Therefore, it is imperative that portion C FB boiler carries out the denitration transformation.
SNCR is the flue-gas denitration process that is applied to a kind of comparative maturity of pulverized-coal fired boiler, under the situation of not adding catalyst, uses denitrification reducing agent (urea liquid or ammoniacal liquor etc.) directly to spray in 850 ℃ ~ 1150 ℃ the flue gas, with NO
XReduction reaction takes place, and product is water and N
2, reduce NO
XDischarging.The CFB boiler is as a kind of low NO
XTechnology, its NO
XDischarging is generally at 150 ~ 300mg/m3 (6%O
2), for further reducing NO in the CFB boiler smoke
XConcentration of emission makes its discharging reach up-to-date environmental protection standard requirement, needs to adopt gas denitrifying technology.
But SNCR is applied to that the CFB boiler is at present domestic still to be belonged to blankly, has a small amount of device to put into operation abroad, and is in operation and has more defective.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art; The purpose of the utility model is to provide a kind of denitrification apparatus that is used for CFBB; Can realize that reducing agent feeds high-temperature flue gas by quantification stability and mix to be carrying out denitration reaction with flue gas; The reaction temperature window zone time of staying is long, system stability, efficient, low consumption, automaticity height.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of denitrification apparatus that is used for CFBB comprises:
Be used to prepare the dissolving module 1 of urea liquid;
Connect the memory module 2 that 1 outlet of dissolving module is used to store its urea liquid of preparing;
Connect memory module 2 outlets and be used for dilution module 3 the urea liquid dilution;
Connect 3 outlets of dilution module and will dilute the distribution and computation module 4 that the back urea solution metering is assigned as multichannel;
The jet module of forming by the terminal spray gun 37 in each road that is connected in after metering distributes 6;
And,
Be arranged at the middle compressed air module 5 that atomizing air is provided for spray gun 37 in each road after metering distributes.
The utility model can also comprise waste heat recycle module 36, and the coolant outlet of waste heat recycle module 36 1 termination spray guns 37, the other end connect dissolving module 1 and memory module 2 respectively.
Said dissolving module 1 comprises the airtight urea liquid preparation jar 7 with first overflow pipe 17 and first emptying valve 14; Urea liquid preparation jar 7 connection heating steam sources 38 and dissolving water source 39; First temperature measuring set 16, liquid level gauge 12 and agitator 8 are set in the urea liquid preparation jars 7, and agitator 8 connects agitator motor 9, termination funnel 10 in the urea liquid preparation jars 7; The outlet that is positioned at urea liquid preparation jar 7 bottoms is provided with first circulating pump 18; Discharge liquid through first circulating pump 18 is divided into two-way, one road tieback to urea liquid preparation jar 7, and another road is connected to memory module 2.
Said memory module 2 comprises the urea liquid storage tank 21 that has second overflow pipe 23 and second emptying valve 24; Another road of said first circulating pump 18 is connected to urea liquid storage tank 21; Urea liquid storage tank 21 connects heating steam source 38; Second temperature measuring set 22 is set in the urea liquid storage tank 21, and the outlet that is positioned at the bottom of urea liquid storage tank 21 is provided with second circulating pump 26, is connected to dilution module 3 through the discharge liquid of second circulating pump 26.
Said dilution module 3 comprises blender 27, and said discharge liquid through second circulating pump 26 is connected to an inlet of blender 27, and another inlet of blender 27 connects dilution water source 40, and the outlet of blender 27 is connected to distribution and computation module 4.
Said distribution and computation module 4 comprises many group flowmeters 31 and control valves 32, according to the flow needs fluid of blender 27 is divided into multichannel.
Said compressed air module 5 comprises the compressed air main valve 33 and atomizing air control valve 34 that is connected to compressed air source 41 successively, the compressed air of compressed air source 41 through compressed air main valve 33 after the atomizing air control valve 34 before each spray gun 37 inputs to corresponding spray gun 37.
Said spray gun 37 comprises parallel aqueous suction pipes 3705 and air hose 3707; Inner sleeve 3702 is enclosed within on aqueous suction pipes 3705 and the air hose 3707; Outer tube 3701 is enclosed within on the inner sleeve 3702; Outer tube 3701 tube wall hollows and have one deck interlayer of not sealing 3720 parallel with its tube wall, interlayer 3720 is divided into internal layer 3721 with outer 3722 with the hollow tube wall of outer tube 3701, and internal layer 3721 connects cooling water water inlet interface 3704; Outer 3722 connect cooling water water outlet interface 3703, and aqueous suction pipes 3705 and air hose 3707 all are connected to the nozzle 3713 of taper.
Said spray gun 37 is vertically installed on the horizontal flue of CFBB.
The utility model compared with prior art has the following advantages:
(1) the utility model modularization, systematization, automaticity height, all operations only need get final product in the control room operation.
(2) gun design of uniqueness; Prolong the service life of spray gun, guaranteed stability, the reliability of spray gun work, simultaneously; Adopted exclusive water cooled spray gun; The recirculated cooling water that utilized drawn get back to solution module and memory module,, practiced thrift steam consumption quantity for the preparation and the storage of urea liquid provides the heating thermal source.During the whole system operate as normal, need extra steam can realize the preparation and the storage of urea liquid hardly.
(3) the employing water-cooling pattern replaces conventional spray gun air cooling way and with heat recovery and utilization, can reduce the about 1000 ~ 3000m of compressed air consumption
3/ h saves the air compressor machine investment and slows down the influence that boiler efficiency descends.
(4) choosing of exclusive horizontal flue spray site position, the transformation that makes the SNCR denitration technology be applied to existing CFB has had higher operability, changes little, small investment, denitration efficiency height.Spray gun arranges vertically on the horizontal flue that this place's flue sectional area is little, flow velocity is high, be convenient to mixing; Flue gas gets into cyclone separator after the spray gun layout points, turbulent flow is violent here, has aggravated the mixing velocity of reductant solution and flue gas, and reduction reaction is taken place faster, and denitration efficiency can reach more than 60% at once.
Description of drawings
Fig. 1 is the utility model structural representation, and arrow is the flow direction signal of various fluids among the figure.
Fig. 2 is a kind of spray gun structure sketch map of the utility model.
The specific embodiment
Specify the embodiment of the utility model below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1, a kind of denitrification apparatus that is used for CFBB of the utility model comprises:
Be used to prepare the dissolving module 1 of urea liquid: dissolving module 1 comprises the airtight urea liquid preparation jar 7 with first overflow pipe 17 and first emptying valve 14; Urea liquid preparation jar 7 connection heating steam sources 38 and dissolving water source 39; First temperature measuring set 16, liquid level gauge 12 and agitator 8 are set in the urea liquid preparation jars 7; Agitator 8 connects agitator motor 9; Urea liquid prepares termination funnel 10 on the jar 7, and the outlet that is positioned at urea liquid preparation jar 7 bottoms is provided with first circulating pump 18, the preparation of completion urea liquid in urea liquid preparation jar 7.The urea liquid for preparing is divided into two-way through the discharge liquid of first circulating pump 18, and one the tunnel through circulation control valve 20 tiebacks to urea liquid preparation jar 7, and another road is connected to memory module 2 through circulating-pump outlet valve 19.
Connect the memory module 2 that 1 outlet of dissolving module is used to store its urea liquid of preparing: memory module 2 comprises the urea liquid storage tank 21 that has second overflow pipe 23 and second emptying valve 24; Urea liquid storage tank 21 can be provided with one or more according to actual conditions, and general requirement can guarantee that system moves 5 ~ 7 days continuously.The storing temperature of the urea liquid that has configured is as long as guaranteeing solution no crystallization under this temperature separates out, the design temperature lower limit, and when temperature is lower than lower limit, heating steam valve II25 utilizes steam or utilizes waste heat recycle module 36 to regulate automatically.The coolant outlet of waste heat recycle module 36 1 termination spray guns 37, the other end connect dissolving module 1 and memory module 2 respectively.Another road of first circulating pump 18 is connected to urea liquid storage tank 21; Urea liquid storage tank 21 connects heating steam source 38; Second temperature measuring set 22 is set in the urea liquid storage tank 21; The outlet that is positioned at the bottom of urea liquid storage tank 21 is provided with second circulating pump 26, is connected to dilution module 3 through the discharge liquid of second circulating pump 26.
Connect memory module 2 outlets and be used for the dilution module 3 with the urea liquid dilution: dilution module 3 comprises blender 27; Said discharge liquid through second circulating pump 26 is connected to an inlet of blender 27; Another inlet of blender 27 connects dilution water source 40, and the outlet of blender 27 is connected to distribution and computation module 4.
Connect the outlet of dilution module 3 and will dilute the distribution and computation module 4 that the back urea solution metering is assigned as multichannel: distribution and computation module 4 comprises many group flowmeters 31 and control valves 32, according to the flow needs fluid of blender 27 is divided into multichannel.
The jet module of forming by the terminal spray gun 37 in each road that is connected in after metering distributes 6;
And,
Be arranged in the middle of each road after metering distributes the compressed air module 5 that atomizing air is provided for spray gun 37: compressed air module 5 comprises the compressed air main valve 33 and atomizing air control valve 34 that is connected to compressed air source 41 successively, the compressed air of compressed air source 41 through compressed air main valve 33 after the atomizing air control valve 34 before each spray gun 37 inputs to corresponding spray gun 37.
As shown in Figure 2; The spray gun 37 of the utility model comprises parallel aqueous suction pipes 3705 and air hose 3707; Inner sleeve 3702 is enclosed within on aqueous suction pipes 3705 and the air hose 3707, and outer tube 3701 is enclosed within on the inner sleeve 3702, and mounting flange 3719 is arranged outside the outer tube 3701; Have vertical supporting construction 3715 to support in the inner sleeve 3702, supporting construction 3715 realizes contacting with the airtight of inner sleeve 3702 through supporting construction sealing gasket 3718.Outer tube 3701 tube wall hollows and have one deck interlayer of not sealing 3720 parallel with its tube wall; Interlayer 3720 is divided into internal layer 3721 and outer 3722 with the hollow tube wall of outer tube 3701; Internal layer 3721 connects cooling water water inlet interface 3704; Outer 3722 connect cooling water water outlet interface 3703, and aqueous suction pipes 3705 and air hose 3707 all are connected to the nozzle 3713 of taper, and the end in addition of aqueous suction pipes 3705 has aqueous suction pipes joint 3706 to receive on the water supply line; Water pipe end socket 3716 is arranged on it; The end in addition of air hose 3707 is free gas-tpe fitting 3708 to receive on the steam line, and this end position also is provided with movement connecting mechanism 3717, and the side of nozzle 3713 is connected to the liquid cap 3709 of annular through nozzle connection 3710; A liquid cap gasket of liquid cap 3709 below pads sheet 3711 carries out fit sealing; The termination of nozzle 3713 is provided with an air cap 3712, and air cap gasket seal of air cap 3712 below pads 3714 carries out fit sealing, and whole spray gun 37 vertically perhaps is horizontally placed on the flue of CFBB.
The operation principle of spray gun 37 is:
Recirculated cooling water gets into inner sleeve 3702 by cooling water water inlet interface 3704; Get into the spray gun leading portion with the rifle body; Cooling water water outlet interface 3703 from outer tube 3701 turns back to the female pipe of recirculated water backwater at last, and this kind endless form has been strengthened the heat exchange effect, has improved the cooling effect to spray gun.Movement connecting mechanism 3717 is through being connected with cylinder (or other movable body), and it is flexible to drive ejection assemblies, and nozzle 3713 can be adjusted thereupon, also can under the situation that does not change nozzle 3713 outward appearances, change nozzle flow, operating pressure ability performance parameter.When quitting work, can ejection assemblies be recovered in the internal and external casing of water-cooled, guarantee that nozzle is not burnt out, solve the problem of nozzle long term exposure easy scaling loss in high-temperature flue gas in the past.
The course of work of the utility model is following:
Dissolving module 1 is after receiving instruction, and dissolving water valve 13 is opened, and solution water enters into urea liquid preparation jar 7, and agitator motor 9 drives agitator 8 runnings and begins to prepare solution.When liquid level gauge 12 arrived designated value, hopper valve 11 was opened, and urea adds from funnel 10.After urea is added to designated value, begin to stir.In whipping process, heating steam valve I15 according to temperature measuring set value of feedback also setting value relatively utilizes steam to realize heating automatically.Circulating pump 18 prepares signal receiving urea liquid, and entry into service is transported to storage tank 21 with urea liquid.Memory module 2 receives the instruction beginning operation automatically that puts into operation; Pressure flow is regulated and is carried out variable frequency adjustment according to setting value; To mix up solution afterwards and deliver to the blender 27 in the dilution module 3; Utilize urea liquid valve 29 control conveying capacities, control blender 27 and the dilution water control valve 28 that dilutes on water source 40 pipelines carry out automatic mixing according to the urea liquid flow and regulate.The dilute solution that goes out blender 27 enters into distribution and computation module 4 by 30 controls of dilute solution control valve; Many groups flowmeter 31 and control valve 32 in the distribution and computation module 4; According to the flow needs dilution is divided into multichannel, enters into jet module 6 afterwards, offer each spray gun 37.Spray gun 37 provides atomizing air by compressed air module 5; Through control compressed air main valve 33 and atomizing air control valve 34; Can the compressed air of compressed air source 41 be provided to spray gun 37 uses; In the course of injection, can utilize waste heat recycle module 36 that all spray gun cooling waters are collected and be returned to urea liquid preparation jar 7 and storage tank 21, realize energy-conservation.
Claims (7)
1. a denitrification apparatus that is used for CFBB is characterized in that, comprising:
Be used to prepare the dissolving module (1) of urea liquid;
Connect the memory module (2) that dissolving module (1) outlet is used to store its urea liquid of preparing;
Connect memory module (2) outlet and be used for dilution module (3) the urea liquid dilution;
Connect dilution module (3) outlet and will dilute the distribution and computation module (4) that the back urea solution metering is assigned as multichannel;
The jet module of forming by the terminal spray gun (37) in each road that is connected in after metering distributes (6);
And,
Be arranged at the middle compressed air module (5) that atomizing air is provided for spray gun (37) in each road after metering distributes.
2. the denitrification apparatus that is used for CFBB according to claim 1; It is characterized in that; Also comprise waste heat recycle module (36), the coolant outlet of waste heat recycle module (36) one termination spray guns (37), the other end connect dissolving module (1) and memory module (2) respectively.
3. the denitrification apparatus that is used for CFBB according to claim 1 and 2; It is characterized in that; Said dissolving module (1) comprises the airtight urea liquid preparation jar (7) with first overflow pipe (17) and first emptying valve (14), and urea liquid preparation jar (7) connects heating steam source (38) and dissolving water source (39), in the urea liquid preparation jar (7) first temperature measuring set (16), liquid level gauge (12) and agitator (8) is set; Agitator (8) connects agitator motor (9); Termination funnel (10) is gone up in urea liquid preparation jar (7), and an outlet that is positioned at urea liquid preparation jar (7) bottom is provided with first circulating pump (18), is divided into two-way through the discharge liquid of first circulating pump (18); One road tieback to urea liquid preparation jar (7), another road is connected to memory module (2).
4. the denitrification apparatus that is used for CFBB according to claim 3; It is characterized in that; Said memory module (2) comprises the urea liquid storage tank (21) that has second overflow pipe (23) and second emptying valve (24); Another road of said first circulating pump (18) is connected to urea liquid storage tank (21), and urea liquid storage tank (21) connects heating steam source (38), and second temperature measuring set (22) is set in the urea liquid storage tank (21); The outlet that is positioned at the bottom of urea liquid storage tank (21) is provided with second circulating pump (26), is connected to dilution module (3) through the discharge liquid of second circulating pump (26).
5. the denitrification apparatus that is used for CFBB according to claim 4; It is characterized in that; Said dilution module (3) comprises blender (27); Said discharge liquid through second circulating pump (26) is connected to an inlet of blender (27), and another inlet of blender (27) connects dilution water source (40), and the outlet of blender (27) is connected to distribution and computation module (4).
6. the denitrification apparatus that is used for CFBB according to claim 5 is characterized in that, said distribution and computation module (4) comprises many group flowmeters (31) and control valves (32), according to the flow needs fluid of blender (27) is divided into multichannel.
7. the denitrification apparatus that is used for CFBB according to claim 6; It is characterized in that; Said compressed air module (5) comprises compressed air main valve (33) and the atomizing air control valve (34) that is connected to compressed air source (41) successively, the compressed air of compressed air source (41) through compressed air main valve (33) after the preceding atomizing air control valve (34) of each spray gun (37) inputs to corresponding spray gun (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220268357.4U CN202606021U (en) | 2012-06-07 | 2012-06-07 | Denitration device for circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220268357.4U CN202606021U (en) | 2012-06-07 | 2012-06-07 | Denitration device for circulating fluidized bed boiler |
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|---|---|
| CN202606021U true CN202606021U (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220268357.4U Withdrawn - After Issue CN202606021U (en) | 2012-06-07 | 2012-06-07 | Denitration device for circulating fluidized bed boiler |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688688A (en) * | 2012-06-07 | 2012-09-26 | 中国华能集团清洁能源技术研究院有限公司 | SNCR (Selective Non Catalytic Reduction) denitration device with low energy consumption and high efficiency for circulating fluidized bed boilers |
| WO2015021644A1 (en) * | 2013-08-16 | 2015-02-19 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
| CN106029208A (en) * | 2015-01-20 | 2016-10-12 | 通用电器技术有限公司 | Boiler and device for selective non catalytic reduction |
| CN106292270A (en) * | 2016-09-09 | 2017-01-04 | 淮南矿业(集团)有限责任公司 | A kind of CFBB denitration automaton and method thereof |
| US9822685B2 (en) | 2013-08-16 | 2017-11-21 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
| CN114797435A (en) * | 2022-05-17 | 2022-07-29 | 合肥中亚环保科技有限公司 | SNCR (selective non-catalytic reduction) denitration system for circulating fluidized bed boiler |
-
2012
- 2012-06-07 CN CN201220268357.4U patent/CN202606021U/en not_active Withdrawn - After Issue
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688688A (en) * | 2012-06-07 | 2012-09-26 | 中国华能集团清洁能源技术研究院有限公司 | SNCR (Selective Non Catalytic Reduction) denitration device with low energy consumption and high efficiency for circulating fluidized bed boilers |
| WO2015021644A1 (en) * | 2013-08-16 | 2015-02-19 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
| CN105492731A (en) * | 2013-08-16 | 2016-04-13 | 天纳克汽车经营有限公司 | Water injection exhaust treatment system |
| US9334775B2 (en) | 2013-08-16 | 2016-05-10 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
| US9822685B2 (en) | 2013-08-16 | 2017-11-21 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
| CN105492731B (en) * | 2013-08-16 | 2018-09-11 | 天纳克汽车经营有限公司 | Water injection type exhaust-gas treatment system |
| CN106029208A (en) * | 2015-01-20 | 2016-10-12 | 通用电器技术有限公司 | Boiler and device for selective non catalytic reduction |
| US10434470B2 (en) | 2015-01-20 | 2019-10-08 | General Electric Technology Gmbh | Boiler and device for selective non catalytic reduction |
| CN106029208B (en) * | 2015-01-20 | 2020-10-02 | 通用电器技术有限公司 | Boiler and device for selective non-catalytic reduction |
| CN106292270A (en) * | 2016-09-09 | 2017-01-04 | 淮南矿业(集团)有限责任公司 | A kind of CFBB denitration automaton and method thereof |
| CN114797435A (en) * | 2022-05-17 | 2022-07-29 | 合肥中亚环保科技有限公司 | SNCR (selective non-catalytic reduction) denitration system for circulating fluidized bed boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA HUANENG GROUP R + D CENTER Effective date: 20131230 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131230 Address after: 100098 Beijing city Haidian District No. 48 Zhichun Road Yingdu building A block 26 layer Patentee after: China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. Patentee after: Huaneng Group Technology Innovation Center Address before: 100098 Beijing city Haidian District No. 48 Zhichun Road Yingdu building A block 26 layer Patentee before: China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20121219 Effective date of abandoning: 20140312 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20121219 Effective date of abandoning: 20140312 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |