CN105041432A - Anti-crystallization device for carbamide nozzle of selective catalytic reduction (SCR) system - Google Patents
Anti-crystallization device for carbamide nozzle of selective catalytic reduction (SCR) system Download PDFInfo
- Publication number
- CN105041432A CN105041432A CN201510476481.8A CN201510476481A CN105041432A CN 105041432 A CN105041432 A CN 105041432A CN 201510476481 A CN201510476481 A CN 201510476481A CN 105041432 A CN105041432 A CN 105041432A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- hot gas
- vortex tube
- carbamide
- urea
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Nozzles (AREA)
Abstract
Disclosed is an anti-crystallization device for a carbamide nozzle of a selective catalytic reduction (SCR) system. The anti-crystallization device comprises a solenoid valve, a vortex tube assembly and a spray head assembly. A gas inlet of the vortex tube assembly is provided with the solenoid valve. One end of the vortex tube assembly is connected with the spray head assembly through a cool gas pipeline, and the other end of the vortex tube assembly is connected with the spray head assembly through a hot gas pipeline. The spray head assembly is further provided with a carbamide inlet. The tail end of the spray head assembly is provided with a carbamide nozzle orifice, a hot gas nozzle orifice and a cool gas nozzle orifice. The carbamide nozzle orifice is nested in the cool gas nozzle orifice. The cool gas nozzle orifice is nested in the hot gas nozzle orifice. Compressed gas can be transformed into cool gas flow and hot gas flow. The cool gas flow can be used for cooling components in the spray head assembly. The hot gas flow can be used for heating carbamide. The cool gas flow and the hot gas flow finally produce gas curtains through the nozzle orifices and the gas curtains isolate carbamide mist and high-temperature tail gas at the nozzle, and carbamide crystallization produced at the nozzle is avoided to the greatest extent. At the same time, cooling and heating effects are achieved in different positions simply and reliably; the production and maintenance cost of the system is low.
Description
Technical field
The present invention relates to motor exhaust processing technology field, particularly a kind of crystallization prevention device of SCR system urea nozzle.
Background technique
SCR(SelectiveCatalyticReduction, selective catalytic reduction), refer to and utilize catalyzer that the nitrogen oxide in diesel motor exhaust is catalysed and reduced into the technology of nitrogen and water, for employing aqueous solution of urea, (usual concentration is 32.5%, hereinafter referred to as urea) as the motor exhaust after-treatment system of SCR reactant, final all needs makes it participate in catalytic reduction reaction by spraying into outlet pipe after urea atomization, but after urea spraying directly contacts from nozzle ejection with high-temperature exhaust air, moisture flash evaporation wherein easily causes urea crystals and is attached to around nozzle orifice, thus plug nozzle, this is particularly evident at low dose of injection phase.
The device of solution spray nozzle clogging in the market roughly has two kinds, one wraps up ceramic insulating material around nozzle, reduce the heat that nozzle body absorbs from outlet pipe as far as possible, thus the heat that minimizing spout passes to urea spraying avoids wherein moisture premature evaporation.But due to structural limitations, spout finally still can directly contact with high-temperature exhaust air, cannot thoroughly deal with problems.Another kind increases arm on outlet pipe, and by arrangement of nozzles in arm, make urea spraying enter main exhaust again after arm ejection.Increased the distance of nozzle and main exhaust by arm, reach the object reducing nozzle periphery gas flow temperature.In shower nozzle assembly, water circulating pipe is set simultaneously, utilizes engine cooling water to lower the temperature to shower nozzle, avoid the too high urea that makes of nozzle temperature at nozzle evaporative crystallization.The shortcoming of this scheme is: outlet pipe needs increase arm specially, makes complicated, interchangeability and versatility bad; Shower nozzle inside adopts constituent pipeline complicated, and manufacture cost is high and high to seal request, once leaking appears in water-cooled pipeline, then engine-cooling system hydraulic pressure may be caused low and then cause motor normally to work; In addition, this kind of scheme spout still can directly contact with high-temperature exhaust air.
Summary of the invention
The technical problem to be solved in the present invention is for the deficiencies in the prior art, proposes a kind of crystallization prevention device that can prevent SCR system urea nozzle.
The technical problem to be solved in the present invention is achieved through the following technical solutions, the present invention is the crystallization prevention device of SCR system urea nozzle, be characterized in: comprise solenoid valve, vortex tube assembly, shower nozzle assembly, the suction port of described vortex tube assembly is provided with solenoid valve, described vortex tube assembly one end is connected with shower nozzle assembly by cold duct, the other end is connected with shower nozzle assembly by hot gas duct, described shower nozzle assembly is also provided with urea import, the end of this shower nozzle assembly is provided with urea spout, hot gas spout, cold air spout, described urea spout is entrenched in cold air spout, described cold air spout is entrenched in hot gas spout.
In the crystallization prevention device technological scheme of SCR system urea nozzle of the present invention, preferred technological scheme feature is further:
1, described vortex tube assembly comprises vortex chamber, vortex tube suction port, is provided with HALF OPENING cavity in described vortex chamber, and described cavity is nozzle of air supply, and described nozzle of air supply is connected with vortex tube suction port;
2, described hot gas duct is provided with for regulating hot gas output quantity electric controlled regulating valve;
3, described hot gas duct and cold duct are provided with thermal-protective coating on shower nozzle assembly, and described thermal-protective coating is thermal insulation ceramics, and this thermal insulation ceramics outer wrap has stainless steel
4, described vortex chamber also comprises cold air separating opening, and the front end that described cold air separating opening is positioned at vortex chamber is connected with cold duct.
Compared with prior art, the double-deck air curtain that the present invention produces can isolate urea spraying and the high-temperature gas in outlet pipe at nozzle place, thus the time that the urea spraying postponing nozzle place directly contacts with high temperature, reduce the risk of nozzle place Crystallization Plugging; Without the need to extra outlet pipe arm, urea nozzle erection support structure can be simplified; The cold air that this device produces also can be used to cooling spray assembly, thus avoid using complicated constituent, hot gas can be used to heat the urea before entering outlet pipe, reduce the heat absorbed after it enters outlet pipe, be conducive to urea pyrolysis reaction occur thus ensure the reduction effect of SCR, this device simply, reliably achieve simultaneously refrigeration, heating effect, produce and maintenance cost low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is vortex tube assembly structure schematic diagram.
Fig. 3 is shower nozzle assembly structure schematic diagram.
Embodiment
Referring to accompanying drawing, further describe concrete technological scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction of its power.
Embodiment 1, with reference to Fig. 1, Fig. 2, Fig. 3, comprise solenoid valve 3, vortex tube assembly 2, shower nozzle assembly 8, the suction port 4 of described vortex tube assembly 2 is provided with solenoid valve, described vortex tube assembly 2 one end is connected with shower nozzle assembly 8 by cold duct 1, the other end is connected with shower nozzle assembly 8 by hot gas duct 6, described shower nozzle assembly 8 is also provided with urea import 7, the end of this shower nozzle assembly 8 is provided with urea spout 15, hot gas spout 13, cold air spout 14, described urea spout 15 is entrenched in cold air spout 14, and described cold air spout 14 is entrenched in hot gas spout 13.
Embodiment 2, the crystallization prevention device of the SCR system urea nozzle described in embodiment 1: described vortex tube assembly comprises vortex chamber 11, vortex tube suction port 10, HALF OPENING cavity is provided with in described vortex chamber 11, described cavity is nozzle of air supply 12, and described nozzle of air supply 12 is connected with vortex tube suction port 10;
Embodiment 3, the crystallization prevention device of the SCR system urea nozzle described in embodiment 1: described hot gas duct 6 is provided with for regulating hot gas output quantity electric controlled regulating valve 5;
Embodiment 4, the crystallization prevention device of the SCR system urea nozzle described in embodiment 1: described hot gas duct 6 and cold duct 1 are provided with thermal-protective coating on shower nozzle assembly 8, and described thermal-protective coating is thermal insulation ceramics, and this heat insulation pottery magnetic ceramic outer is enclosed with stainless steel.
Embodiment 5, the crystallization prevention device of the SCR system urea nozzle described in embodiment 2: described vortex chamber 11 also comprises cold air separating opening 9, and the front end that described cold air separating opening 9 is positioned at vortex chamber 11 is connected with cold duct 1.
In use; in Fig. 1, Fig. 2, utilize tracheae that pressurized air is introduced vortex tube assembly 2 from suction tude 4 through solenoid valve 3; vortex temperature segregation phenomenon effect can be there is therein when pressurized air enters vortex tube assembly when solenoid valve 3 is opened; thus pressurized gas is divided into cold airflow and velocity heated gas; cold airflow exports from cold duct 1; hot air flow exports from hot gas duct 6, and urea enters shower nozzle assembly 8 urea that finally ejection ring-type air curtain is protected from urea import 7 and sprays.Be provided with electric controlled regulating valve 5 between vortex tube assembly 2 and hot gas duct 6, by the assignment of traffic ratio to the hot and cold air-flow of its input aperture adjustment signal adjustable, thus change hot and cold gas outlet temperature.
Fig. 2 is the signal of vortex tube assembly structure, when pressurized air through vortex tube suction port 10 can tangentially enter vortex chamber 11 with subsonic speed or supersonic speed and form free vortex flow after nozzle of air supply 1 expands, cold airflow and hot air flow will be divided into after eddy current internal and external layer air-flow carries out exchange of kinetic energy, cold airflow flows out from cold air sorting hole 9, hot air flow after electric controlled regulating valve 5 from hot gas duct) discharge, regulate the aperture of electric controlled regulating valve 5 can change the output quantity of hot air flow by electrical signal, and then change the temperature of hot and cold gas.
Respective independently Cemented filling is passed through to shower nozzle end after hot and cold air-flow and urea enter shower nozzle assembly 8 respectively; the thermal insulation ceramics wrapped up by stainless steel between pipeline and high-temperature tail gas carries out thermal insulation protection; hot air flow is sprayed by the hot gas spout 13 of ring-type and forms hot air door 18; cold airflow sprays from cold air spout 14 and forms cold air curtain 17; urea sprays from urea spout 15 and forms urea spraying 16, and urea spraying is isolated with high-temperature tail gas by hot and cold air curtain within the specific limits.
Claims (5)
- The crystallization prevention device of 1.SCR system urea nozzle, it is characterized in that: comprise solenoid valve, vortex tube assembly, shower nozzle assembly, the suction port of described vortex tube assembly is provided with solenoid valve, described vortex tube assembly one end is connected with shower nozzle assembly by cold duct, the other end is connected with shower nozzle assembly by hot gas duct, described shower nozzle assembly is also provided with urea import, the end of this shower nozzle assembly is provided with urea spout, hot gas spout, cold air spout, described urea spout is entrenched in cold air spout, and described cold air spout is entrenched in hot gas spout.
- 2. the crystallization prevention device of SCR system urea nozzle according to claim 1, it is characterized in that: described vortex tube assembly comprises vortex chamber, vortex tube suction port, be provided with HALF OPENING cavity in described vortex chamber, described cavity is nozzle of air supply, and described nozzle of air supply is connected with vortex tube suction port.
- 3. the crystallization prevention device of SCR system urea nozzle according to claim 1, is characterized in that: described hot gas duct is provided with for regulating hot gas output quantity electric controlled regulating valve.
- 4. the crystallization prevention device of SCR system urea nozzle according to claim 1, is characterized in that: described hot gas duct and cold duct are provided with thermal-protective coating on shower nozzle assembly, and described thermal-protective coating is thermal insulation ceramics, and this thermal insulation ceramics outer wrap has stainless steel.
- 5. the crystallization prevention device of SCR system urea nozzle according to claim 2, is characterized in that: described vortex chamber also comprises cold air separating opening, the front end that described cold air separating opening is positioned at vortex chamber is connected with cold duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510476481.8A CN105041432B (en) | 2015-08-06 | 2015-08-06 | The crystallization prevention device of SCR system urea nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510476481.8A CN105041432B (en) | 2015-08-06 | 2015-08-06 | The crystallization prevention device of SCR system urea nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105041432A true CN105041432A (en) | 2015-11-11 |
| CN105041432B CN105041432B (en) | 2018-03-13 |
Family
ID=54448345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510476481.8A Active CN105041432B (en) | 2015-08-06 | 2015-08-06 | The crystallization prevention device of SCR system urea nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105041432B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939903A (en) * | 2018-06-26 | 2018-12-07 | 中国成达工程有限公司 | A kind of online elimination device and method for the crystallization of SCR urea method denitration nozzle |
| CN113803903A (en) * | 2021-09-02 | 2021-12-17 | 南京信息职业技术学院 | Gas-liquid mixing cooling device and cooling method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5943858A (en) * | 1995-05-19 | 1999-08-31 | Siemens Aktiengesellschaft | Premixing chamber for an exhaust gas purification system |
| CN1821434A (en) * | 2005-02-18 | 2006-08-23 | 诺信公司 | Deposition device having a thermal control system |
| JP2010014086A (en) * | 2008-07-07 | 2010-01-21 | Toyota Industries Corp | Vortex tube and exhaust gas treatment device of internal combustion engine |
| CN103673369A (en) * | 2012-09-26 | 2014-03-26 | （株）京道商社 | Vortex tube |
| JP2014148937A (en) * | 2013-02-01 | 2014-08-21 | Hino Motors Ltd | Exhaust purification system and ozone generation device |
| CN203971758U (en) * | 2014-07-30 | 2014-12-03 | 北京洛卡环保技术有限公司 | A kind of denitrating flue gas spraying urea liquid emitter |
| CN204827616U (en) * | 2015-08-06 | 2015-12-02 | 茵卡排放控制系统（江苏）有限公司 | SCR system urea nozzle prevent crystallization device |
-
2015
- 2015-08-06 CN CN201510476481.8A patent/CN105041432B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5943858A (en) * | 1995-05-19 | 1999-08-31 | Siemens Aktiengesellschaft | Premixing chamber for an exhaust gas purification system |
| CN1821434A (en) * | 2005-02-18 | 2006-08-23 | 诺信公司 | Deposition device having a thermal control system |
| JP2010014086A (en) * | 2008-07-07 | 2010-01-21 | Toyota Industries Corp | Vortex tube and exhaust gas treatment device of internal combustion engine |
| CN103673369A (en) * | 2012-09-26 | 2014-03-26 | （株）京道商社 | Vortex tube |
| JP2014148937A (en) * | 2013-02-01 | 2014-08-21 | Hino Motors Ltd | Exhaust purification system and ozone generation device |
| CN203971758U (en) * | 2014-07-30 | 2014-12-03 | 北京洛卡环保技术有限公司 | A kind of denitrating flue gas spraying urea liquid emitter |
| CN204827616U (en) * | 2015-08-06 | 2015-12-02 | 茵卡排放控制系统（江苏）有限公司 | SCR system urea nozzle prevent crystallization device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939903A (en) * | 2018-06-26 | 2018-12-07 | 中国成达工程有限公司 | A kind of online elimination device and method for the crystallization of SCR urea method denitration nozzle |
| CN113803903A (en) * | 2021-09-02 | 2021-12-17 | 南京信息职业技术学院 | Gas-liquid mixing cooling device and cooling method |
| CN113803903B (en) * | 2021-09-02 | 2022-11-25 | 南京信息职业技术学院 | Gas-liquid mixing cooling device and cooling method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105041432B (en) | 2018-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205760580U (en) | Circulating fluidized bed boiler flue gas denitrification system | |
| CN107916973B (en) | SCR urea sprays protection system | |
| CN105041432A (en) | Anti-crystallization device for carbamide nozzle of selective catalytic reduction (SCR) system | |
| CN108284035A (en) | A kind of system and method preventing spray tip fouling | |
| CN106401714A (en) | Mechanical spray nozzle type ammonia gas injection system used for tail gas treatment of automobile diesel engine | |
| CN204827616U (en) | SCR system urea nozzle prevent crystallization device | |
| CN104847463A (en) | Nozzle integrated SCR post treatment unit and method thereof | |
| CN102836792A (en) | Spray nozzle for post-treatment urea SCR (Silicon Controlled Rectifier) system of diesel engine | |
| CN208187121U (en) | Kiln is used in a kind of firing of honeycomb porous ceramics | |
| CN202162098U (en) | Nozzle used for post-processing urea SCR (Selective Catalyst Reduction) system of diesel engine | |
| CN204412055U (en) | A kind of dore furnace flue gas SNCR denitration device reducing agent high-efficiency atomizer | |
| CN203980283U (en) | A kind of multitube gas gun | |
| CN108915830B (en) | Exhaust aftertreatment mixing arrangement | |
| WO2023071261A1 (en) | Experimental device and method for testing features of urea direct-injection pyrolysis spray gun | |
| CN207634148U (en) | A kind of SCR urea injection protection system | |
| CN207598319U (en) | A kind of engine aftertreatment system metered injection valve | |
| CN202250315U (en) | Diesel engine SCR (Semiconductor Control Rectifier) atomizer for air assistant manner | |
| CN104089285A (en) | Multi-tube type gas spray gun | |
| CN206016916U (en) | A kind of pressure jet apparatus formula ammonia spraying system for diesel engine for automobile vent gas treatment | |
| CN204344211U (en) | A kind of urea nozzle with self-cooling function | |
| CN208779927U (en) | Jet stream heating device in a kind of furnace | |
| CN211896058U (en) | Urea pyrolysis system | |
| CN210321237U (en) | Cooling system for cooling in box-type furnace | |
| CN208950679U (en) | A kind of two-fluid SCR urea nozzle | |
| CN204783187U (en) | Processing apparatus behind nozzle integrated form SCR |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180524 Address after: 262200 Li Shan Road, Weifang City, Shandong Province, No. 116 Patentee after: SHANDONG ATK ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 215300 room 1302, science and Technology Plaza, Qianjin East Road, Kunshan Development Zone, Suzhou, Jiangsu. Patentee before: YINKA EMISSION CONTROL SYSTEM (JIANGSU) CO.,LTD. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Anti crystallization device for urea nozzle of SCR system Effective date of registration: 20211220 Granted publication date: 20180313 Pledgee: Shandong Zhucheng rural commercial bank Limited by Share Ltd. Pledgor: SHANDONG ATK ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2021980015754 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230109 Granted publication date: 20180313 Pledgee: Shandong Zhucheng rural commercial bank Limited by Share Ltd. Pledgor: SHANDONG ATK ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2021980015754 |