CN109162786B - Method and device for preventing solution from crystallizing and solution storage tank - Google Patents
Method and device for preventing solution from crystallizing and solution storage tank Download PDFInfo
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- CN109162786B CN109162786B CN201811009021.4A CN201811009021A CN109162786B CN 109162786 B CN109162786 B CN 109162786B CN 201811009021 A CN201811009021 A CN 201811009021A CN 109162786 B CN109162786 B CN 109162786B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1486—Means to prevent the substance from freezing
Abstract
The invention discloses a method for preventing solution from crystallizing, which comprises the following steps: monitoring the ambient temperature and concentration of the solution in real time; when the environmental temperature is monitored to be lower than a first preset value and the concentration of the solution is monitored to be lower than a second preset value, determining that crystals exist in the solution; and removing crystals in the solution by using ultrasonic waves. The invention also discloses a device for preventing the solution from crystallizing and a solution storage tank. By adopting the embodiment of the invention, the crystallization of the solution can be effectively prevented on the premise of not damaging the quality of the solution, and the safety is high.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a method and a device for preventing solution from crystallizing and a solution storage tank.
Background
With the increasing environmental protection requirements, environmental protection departments in various countries propose to further reduce the nitrogen oxide pollutants discharged by diesel engines. At present, the mainstream method for treating diesel vehicle exhaust pollution is to adopt a Selective Catalytic Reduction (SCR) technology, wherein an SCR system is installed in an exhaust system of a diesel vehicle, and the exhaust gas of the diesel vehicle and a vehicle urea solution injected by the SCR system are subjected to catalytic reduction reaction to catalytically reduce NOx in the exhaust gas of a diesel engine into N2 and O2.
The vehicle urea solution is composed of 32.5% of high-purity urea particles and 67.5% of pure water, and the vehicle urea is usually stored in a stainless steel tank with a capacity of 1 ton or several tons, and is crystallized when the vehicle urea solution is dehydrated or the temperature is lower than minus 11 ℃. The use of the crystallized automobile urea is very inconvenient, so that the storage tank is very necessary to be subjected to anti-crystallization treatment in an automobile urea filling station.
The current common anti-crystallization method of the vehicle urea is a heating control method: and setting a lower temperature limit and an upper temperature limit, when the temperature of the automobile urea is lower than the lower temperature limit, the heater is opened to the maximum power to start heating, and when the temperature rises to exceed the upper temperature limit, the heater stops working.
However, this heating control method has the following disadvantages:
1. the heating of the vehicle urea is usually realized by winding a heating belt on the outer wall of the storage tank, rather than directly putting a heating rod into the vehicle urea solution for heating. The heating mode can lead the four walls of the urea storage tank to generate heat rapidly, so that urea crystals can fall off from the tank walls and suspend in the urea solution, and unless the heater raises the temperature of the whole solution to melt the whole crystals, the suspended crystals can block an infusion port or an infusion pipeline to cause faults.
2. Even if the method can ensure that the temperature of all the urea solution in the storage tank is raised to melt all the crystals, the storage capacity of the storage tank is in ton unit, so a large-power heater is needed, the resource waste is caused, and the method is unattended and the safety cannot be guaranteed.
3. Since the heat transfer of the vehicle urea solution takes a certain time and the vehicle urea storage tank is inconvenient to install the stirring device, the reason is that the temperature near the tank wall close to the heating belt in the storage tank is high, and the temperature of the part far away from the tank wall is lower, so that the local vehicle urea temperature is too high, which will change the quality of the vehicle urea.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method, an apparatus, and a solution storage tank for preventing solution crystallization, which can effectively prevent solution crystallization without deteriorating the quality of the solution and have high safety.
In order to solve the problems in the prior art, an embodiment of the present invention provides a method for preventing a solution from crystallizing, including:
monitoring the ambient temperature and concentration of the solution in real time;
when the environmental temperature is monitored to be lower than a first preset value and the concentration of the solution is monitored to be lower than a second preset value, determining that crystals exist in the solution;
and removing crystals in the solution by using ultrasonic waves.
Further, the method for preventing crystallization of a solution further comprises:
and when the environmental temperature is monitored to be higher than the first preset value, judging that the solution cannot be crystallized, and recording the current concentration of the solution as the second preset value.
Further, the removing of the crystals in the solution by using ultrasonic waves specifically includes:
and adjusting the intensity of the ultrasonic wave according to the change value of the solution concentration so as to remove the crystals in the solution by using the adjusted ultrasonic wave.
Preferably, the solution is automotive urea.
Correspondingly, the embodiment of the invention also provides a device for preventing the solution from crystallizing, which can realize all the processes of the method for preventing the solution from crystallizing, and the device for preventing the solution from crystallizing comprises a concentration sensor, a temperature sensor, a controller and an ultrasonic module;
the temperature sensor is used for monitoring the environmental temperature of the solution in real time;
the concentration sensor is used for monitoring the concentration of the solution in real time;
the controller is used for judging that crystals exist in the solution and starting the ultrasonic module when the environment temperature is monitored to be lower than a first preset value and the concentration of the solution is monitored to be lower than a second preset value;
the ultrasonic module is used for generating ultrasonic waves to remove crystals in the solution.
Further, the controller is further configured to determine that the solution does not crystallize when the ambient temperature is monitored to be higher than the first preset value, and record the current concentration of the solution as the second preset value.
Further, the controller is also used for adjusting the intensity of the ultrasonic wave generated by the ultrasonic module according to the change value of the solution concentration.
Preferably, the solution is automotive urea.
Correspondingly, the embodiment of the invention also provides a solution storage tank, which comprises a storage tank body and a device for preventing the solution from crystallizing, wherein the device is arranged on the storage tank body;
the storage tank body is of a closed structure and is used for storing solution;
the device for preventing the solution from crystallizing is the device for preventing the solution from crystallizing, and details are not repeated herein.
Further, a concentration sensor and a temperature sensor of the device for preventing the solution from crystallizing are arranged on the inner wall of the storage tank body;
the ultrasonic module of the device for preventing the solution from crystallizing comprises at least one ultrasonic vibrator, and the at least one ultrasonic vibrator is uniformly distributed on the outer wall of the storage tank body.
The method, the device and the solution storage tank for preventing the solution from crystallizing provided by the invention can monitor the environmental temperature and the concentration of the solution in real time, and when the environmental temperature of the solution is lower than a first preset value and the concentration is lower than a second preset value, the existence of the crystals in the solution is judged, so that the crystals in the solution are removed by ultrasonic waves, the quality of the solution is not influenced, a heater is not required, and the safety is high; the crystallization condition of the solution is judged according to the concentration of the solution, the judgment is more accurate, and the crystallization removal effect is better.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of one embodiment of a method of preventing crystallization of a solution provided by the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of an apparatus for preventing crystallization of a solution provided by the present invention;
fig. 3 is a schematic structural diagram of an embodiment of the solution storage tank provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic flow chart of an embodiment of the method for preventing crystallization of a solution according to the present invention is shown.
The method for preventing the crystallization of the solution provided by the embodiment of the invention comprises the following steps:
s1, monitoring the ambient temperature and concentration of the solution in real time;
s2, when the environment temperature is monitored to be lower than a first preset value and the concentration of the solution is monitored to be lower than a second preset value, determining that crystals exist in the solution;
and S3, removing crystals in the solution by using ultrasonic waves.
Further, the method for preventing crystallization of a solution further comprises:
and when the environmental temperature is monitored to be higher than the first preset value, judging that the solution cannot be crystallized, and recording the current concentration of the solution as the second preset value.
It should be noted that, in the working process, the environmental temperature and the concentration of the solution are monitored in real time, when the environmental temperature is higher than a first preset value, the solution cannot be crystallized, and at the moment, only the concentration of the solution needs to be recorded without starting ultrasonic waves; when the environmental temperature is lower than the first preset value, the solution may crystallize, the monitored concentration of the solution needs to be compared with a concentration recorded in advance, namely a second preset value, if the concentration of the solution becomes smaller, namely the concentration of the solution is lower than the second preset value, crystallization phenomenon exists in the solution, and at the moment, ultrasonic waves are started so as to remove the crystals in the solution through the ultrasonic waves.
The principle of removing crystals in the solution by ultrasonic waves is as follows: ultrasonic vibrator high-frequency oscillation under ultrasonic power supply module's drive, the transducer converts this kind of high-frequency oscillation into mechanical vibration, and the microbubble in the solution produces high-frequency oscillation under ultrasonic wave's effect the same, and when sound pressure or the sound intensity that the vibration produced reached certain degree, the microbubble will expand the explosion rapidly to "break up" the solution of cubic crystallization, become tiny crystal substance. On one hand, the fine crystals are easier to dissolve, and on the other hand, the fine crystals are continuously decomposed into more tiny crystals under the action of ultrasonic waves until all the fine crystals are dissolved.
Further, the removing of the crystals in the solution by using ultrasonic waves specifically includes:
and adjusting the intensity of the ultrasonic wave according to the change value of the concentration of the solution so as to remove the crystals in the solution by using the adjusted ultrasonic wave.
When it is determined that crystals exist in the solution, the smaller the monitored concentration of the solution is, the more serious the crystals in the solution are, and the ultrasonic waves with higher intensity are required.
Preferably, the solution is automotive urea.
The present embodiment can be applied to the decrystallization of the urea for vehicles, and can also be applied to the decrystallization of other solutions. When the method is applied to other solutions, the crystallization condition in the solution can be judged by monitoring the resistivity, the conductivity or the resistance of the solution.
The following describes an embodiment of the present invention in detail, taking the example of removing urea crystals for vehicles by ultrasonic waves.
Monitoring the environmental temperature and the concentration of the automobile urea in real time, wherein when the environmental temperature is higher than-11 ℃, the automobile urea cannot be crystallized, and at the moment, the concentration of the automobile urea is only required to be recorded without starting ultrasonic waves; when the environmental temperature is lower than-11 ℃, the automobile urea can be crystallized, and when the concentration of the automobile urea is detected to be compared with the concentration stored in advance, the automobile urea has a crystallization phenomenon, and the ultrasonic wave is started to remove the crystals in the automobile urea. In addition, the smaller the measured concentration is, the more serious the crystallization is, so that the intensity of the ultrasonic wave can be automatically adjusted, and the aim of quickly eliminating the crystallization is fulfilled.
It should be noted that the method for removing crystals by using ultrasonic waves in the present embodiment does not affect the quality of the urea solution for vehicles, whereas the heating in the prior art may cause the urea crystals for vehicles to fall off from the wall of the storage tank and suspend in the solution, which may block the pipeline, and if the crystals are to be completely melted, the heating power must be increased, which may cause the water in the urea solution for vehicles to evaporate, thereby affecting the quality of the urea solution for vehicles.
In addition, the present embodiment determines the crystallization state according to the concentration of the urea solution for vehicles, so as to completely remove the crystals, whereas the prior art determines whether the urea solution for vehicles is crystallized or whether the crystals are melted by using the temperature measured by the temperature sensor, since the storage tank usually has a volume of 1-5 cubic meters, and the crystallization of the whole solution cannot be completely determined by using only one or a few temperature sensors.
In summary, the method for preventing the solution from crystallizing provided by the invention can monitor the environmental temperature and the concentration of the solution in real time, and when the environmental temperature of the solution is lower than the first preset value and the concentration is lower than the second preset value, the existence of the crystallization in the solution is determined, so that the crystallization in the solution is removed by ultrasonic waves, the quality of the solution is not affected, a heater is not needed, and the safety is high; the crystallization condition of the solution is judged according to the concentration of the solution, the judgment is more accurate, and the crystallization removal effect is better.
Correspondingly, the embodiment of the invention also provides a device for preventing the solution from crystallizing, which can realize the whole process of the method for preventing the solution from crystallizing in the embodiment.
Fig. 2 is a schematic structural diagram of an embodiment of the apparatus for preventing crystallization of a solution according to the present invention.
The device for preventing the solution from crystallizing comprises a concentration sensor 1, a temperature sensor 2, a controller 5 and an ultrasonic module 6;
the temperature sensor 2 is used for monitoring the environmental temperature of the solution in real time;
the concentration sensor 1 is used for monitoring the concentration of the solution in real time;
the controller 5 is configured to determine that crystals exist in the solution and start the ultrasonic module 6 when the environmental temperature is monitored to be lower than a first preset value and the concentration of the solution is monitored to be lower than a second preset value;
the ultrasonic module 6 is used for generating ultrasonic waves to remove crystals in the solution.
Further, the controller 5 is further configured to determine that the solution does not crystallize when the ambient temperature is monitored to be higher than the first preset value, and record the current concentration of the solution as the second preset value.
Further, the controller 5 is further configured to adjust the intensity of the ultrasonic wave generated by the ultrasonic module 6 according to the magnitude of the change value of the solution concentration.
Preferably, the solution is automotive urea.
The device for preventing the solution from crystallizing can monitor the environmental temperature and the concentration of the solution in real time, and when the environmental temperature of the solution is lower than a first preset value and the concentration of the solution is lower than a second preset value, the crystallization in the solution is judged to be present, so that the crystallization in the solution is removed through ultrasonic waves, the quality of the solution is not influenced, a heater is not needed, and the safety is high; the crystallization condition of the solution is judged according to the concentration of the solution, the judgment is more accurate, and the crystallization removal effect is better.
Correspondingly, the embodiment of the invention also provides a solution storage tank, and referring to fig. 3, the solution storage tank comprises a storage tank body 4 and a device for preventing the solution from crystallizing, which is arranged on the storage tank body;
the storage tank body 4 is of a closed structure and is used for storing solution;
the device for preventing the solution from crystallizing is the device for preventing the solution from crystallizing in the above embodiment, and details are not repeated herein.
Specifically, as shown in fig. 3, the concentration sensor 1 and the temperature sensor 2 of the solution crystallization prevention apparatus are disposed on the inner wall of the storage tank body 4;
the ultrasonic module 6 of the device for preventing the solution from crystallizing comprises at least one ultrasonic vibrator 3, and the at least one ultrasonic vibrator 3 is uniformly distributed on the outer wall of the storage tank body 4.
It should be noted that the solution storage tank of the present embodiment preferably stores vehicle urea, and the storage tank body 4 is preferably a stainless steel storage tank, and is generally a closed cube, rectangular parallelepiped, or barrel-shaped container. Ultrasonic vibrator 3 is fixed on the outer wall of holding vessel body 4 with the screw, according to the external surface area of holding vessel body 4, 2 ultrasonic vibrator 3 of average arrangement per square meter for ultrasonic vibrator 3 evenly distributed also can be according to the actual shape adjustment mounting structure and the installation density of holding vessel body 4.
The solution storage tank provided by the invention can monitor the environmental temperature and the concentration of the solution in real time, and when the environmental temperature of the solution is lower than a first preset value and the concentration of the solution is lower than a second preset value, the crystallization in the solution is judged to be present, so that the crystallization in the solution is removed through ultrasonic waves, the quality of the solution is not influenced, a heater is not needed, and the safety is high; the crystallization condition of the solution is judged according to the concentration of the solution, the judgment is more accurate, and the crystallization removal effect is better.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A method of preventing crystallization of a solution, comprising:
monitoring the ambient temperature and concentration of the solution in real time;
when the environmental temperature is monitored to be lower than a first preset value and the concentration of the solution is monitored to be lower than a second preset value, determining that crystals exist in the solution;
removing crystals in the solution by using ultrasonic waves;
the method for preventing crystallization of a solution further comprises:
and when the environmental temperature is monitored to be higher than the first preset value, judging that the solution cannot be crystallized, and recording the current concentration of the solution as the second preset value.
2. The method for preventing crystallization of a solution according to claim 1, wherein the removing of the crystals in the solution by using ultrasonic waves specifically comprises:
and adjusting the intensity of the ultrasonic wave according to the change value of the concentration of the solution so as to remove the crystals in the solution by using the adjusted ultrasonic wave.
3. The method of preventing crystallization of a solution according to claim 1, wherein the solution is automotive urea.
4. The device for preventing the solution from crystallizing is characterized by comprising a concentration sensor, a temperature sensor, a controller and an ultrasonic module;
the temperature sensor is used for monitoring the environmental temperature of the solution in real time;
the concentration sensor is used for monitoring the concentration of the solution in real time;
the controller is used for judging that crystals exist in the solution and starting the ultrasonic module when the environment temperature is monitored to be lower than a first preset value and the concentration of the solution is monitored to be lower than a second preset value;
the ultrasonic module is used for generating ultrasonic waves to remove crystals in the solution;
and the controller is also used for judging that the solution cannot crystallize when the environment temperature is monitored to be higher than the first preset value, and recording the current concentration of the solution as the second preset value.
5. The apparatus for preventing crystallization of a solution according to claim 4, wherein the controller is further configured to adjust the intensity of the ultrasonic wave generated by the ultrasonic module according to the magnitude of the variation in the solution concentration.
6. The apparatus for preventing crystallization of a solution according to claim 4, wherein the solution is automotive urea.
7. A solution storage tank is characterized by comprising a storage tank body and a device for preventing solution from crystallizing, wherein the device is arranged on the storage tank body;
the storage tank body is of a closed structure and is used for storing solution;
the apparatus for preventing crystallization of a solution is the apparatus for preventing crystallization of a solution according to any one of claims 4 to 6.
8. The solution storage tank as defined in claim 7, wherein the concentration sensor and the temperature sensor of the solution crystallization prevention means are provided on an inner wall of the storage tank body;
the ultrasonic module of the device for preventing the solution from crystallizing comprises at least one ultrasonic vibrator, and the at least one ultrasonic vibrator is uniformly distributed on the outer wall of the storage tank body.
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| CN201811009021.4A CN109162786B (en) | 2018-08-31 | 2018-08-31 | Method and device for preventing solution from crystallizing and solution storage tank |
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| CN201811009021.4A CN109162786B (en) | 2018-08-31 | 2018-08-31 | Method and device for preventing solution from crystallizing and solution storage tank |
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| CN113339112B (en) * | 2021-06-30 | 2022-09-20 | 同济大学 | SCR (Selective catalytic reduction) system for preventing urea crystallization and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201546791U (en) * | 2009-11-19 | 2010-08-11 | 北汽福田汽车股份有限公司 | Urea heating device |
| CN104236379A (en) * | 2013-06-17 | 2014-12-24 | 苏州新华软智能装备有限公司 | Ultrasonic crystals remover of heat exchange equipment |
| CN107744730A (en) * | 2017-11-07 | 2018-03-02 | 山东新蓝环保科技有限公司 | A kind of quick manufacturing machine of urea for vehicle solution |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150308952A1 (en) * | 2014-04-23 | 2015-10-29 | Littelfuse, Inc. | Urea concentration sensor |
| CN207502439U (en) * | 2017-12-13 | 2018-06-15 | 天津格特斯检测设备技术开发有限公司 | The test device of urea tube defrosting performance |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201546791U (en) * | 2009-11-19 | 2010-08-11 | 北汽福田汽车股份有限公司 | Urea heating device |
| CN104236379A (en) * | 2013-06-17 | 2014-12-24 | 苏州新华软智能装备有限公司 | Ultrasonic crystals remover of heat exchange equipment |
| CN107744730A (en) * | 2017-11-07 | 2018-03-02 | 山东新蓝环保科技有限公司 | A kind of quick manufacturing machine of urea for vehicle solution |
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