CN113565602A - Preparation method of urea for vehicle - Google Patents
Preparation method of urea for vehicle Download PDFInfo
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- CN113565602A CN113565602A CN202110552055.3A CN202110552055A CN113565602A CN 113565602 A CN113565602 A CN 113565602A CN 202110552055 A CN202110552055 A CN 202110552055A CN 113565602 A CN113565602 A CN 113565602A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 367
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 273
- 239000004202 carbamide Substances 0.000 title claims abstract description 273
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 719
- 238000011049 filling Methods 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims description 93
- 238000001914 filtration Methods 0.000 claims description 63
- 238000003756 stirring Methods 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 13
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 238000009472 formulation Methods 0.000 claims 5
- 239000000203 mixture Substances 0.000 claims 5
- 239000000243 solution Substances 0.000 description 125
- 239000008213 purified water Substances 0.000 description 53
- 239000011550 stock solution Substances 0.000 description 14
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 239000008187 granular material Substances 0.000 description 6
- 244000005700 microbiome Species 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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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]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a preparation method of urea for vehicles, which comprises the following steps: reading a first water level value in the water storage container and a second water level value in the preparation container; controlling the preparation container to add urea and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to a first water level threshold and the second water level value being less than a second water level threshold; and obtaining the density value of the solution in the preparation container, and obtaining the urea preparation solution when the density value reaches a preset value. The vehicle urea preparation method provided by the invention can realize automatic preparation and filling of the vehicle urea solution, is simple and convenient to operate, and can save the manual operation cost.
Description
Technical Field
The invention relates to the technical field of automobile exhaust treatment, in particular to a preparation method of automobile urea.
Background
With the stricter and stricter requirements of domestic emission regulations, many heavy-duty engine manufacturers adopt an exhaust gas treatment technology of Selective Catalytic Reduction (SCR). The vehicle urea is a liquid used in SCR technology for reducing nitrogen oxide pollution in diesel vehicle exhaust and comprises 32.5% of high-purity urea and 67.5% of deionized water. During operation, the SCR sprays urea solution into an exhaust pipe, the urea solution is decomposed into ammonia and carbon dioxide due to high temperature, and the ammonia and the nitrogen oxide are subjected to reduction reaction under the action of the catalyst to reduce the nitrogen oxide into nitrogen and water, so that the aim of reducing the emission of the nitrogen oxide is fulfilled.
The common modes of filling the vehicle with urea at present are as follows: barreled filling, a mobile urea filling machine mode and a fixed urea filling mode. The most traditional mode is urea barrel filling, the cost is high, time and labor are wasted, and the recycling of the urea barrel is easy to cause secondary pollution, so that the quality of the urea for vehicles is influenced. The urea filling machine on the market at present generally has only a filling function and no preparation function, and the filled urea solution is prepared in advance by a factory and is distributed to each filling point for use. Therefore, the existing urea filling machine is low in automation degree and high in labor cost, and the service efficiency of the urea filling machine is seriously influenced.
Disclosure of Invention
Therefore, it is necessary to provide a vehicle urea preparation method for solving the problem that the existing vehicle urea filling machine cannot automatically prepare a urea solution, wherein the vehicle urea preparation method can realize automatic preparation and filling of the vehicle urea solution, and can save labor operation and transportation cost.
A preparation method of urea for vehicles is characterized by comprising the following steps: reading a first water level value in the water storage container and a second water level value in the preparation container; controlling the preparation container to add urea and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to a first water level threshold and the second water level value being less than a second water level threshold; and obtaining the density value of the solution in the preparation container, and obtaining the urea preparation solution when the density value reaches a preset value.
According to the vehicle urea preparation method, the data conditions of the water quantity in the water storage container and the urea liquid quantity in the preparation container are obtained by reading the first water level value in the water storage container and the second water level value in the preparation container. When the first water level value in the water storage container is larger than or equal to the first water level threshold value, the fact that the purified water in the water storage container is sufficient is prompted. And when the second water level value is smaller than the second water level threshold value in the preparation container, indicating that the urea solution in the preparation container is insufficient. When the two conditions are met simultaneously, urea is added into the preparation container, and the water storage container is controlled to add purified water into the preparation container, so that the automatic preparation of the automobile urea solution is realized. And monitoring the density value of the liquid in the preparation container, stopping adding the urea and the purified water into the preparation container when the density value of the prepared urea solution reaches a preset value, finishing the preparation of the urea solution and obtaining the vehicle urea preparation solution. Through the realization, the automatic preparation of the urea solution for the vehicle can be realized, and the quality of the prepared urea solution can meet the standard requirement through monitoring the density value of the prepared urea solution.
Preferably, when the first water level value in the water storage container is greater than or equal to the first water level threshold value and the second water level value is smaller than the second water level threshold value in the preparation container, the water storage container is controlled to add purified water into the preparation container to a certain liquid level height, and then urea is controlled to be added into the preparation container, so that the urea is more favorably dissolved.
Optionally, the added urea is urea granules or a urea stock solution, and when the added urea is urea granules, the urea granules are placed in the preparation container from a feeding hole of the preparation container. When the added urea is urea stock solution, the urea stock solution flows into the preparation container through a feed inlet of the preparation container.
In one embodiment, the vehicle urea preparation method further includes a stirring device, and the preparation method further includes: and reading the data of the water amount flowing through the preparation container from the water storage container, stopping adding purified water to the preparation container when the water amount flowing through the preparation container is larger than a preset value and the second water level value is larger than or equal to a third water level threshold value, and stirring the urea preparation solution in the preparation container for 5-20 min.
In the method for preparing the vehicle urea, besides reading the first water level value, the second water level value and the solution density value, further reading the water quantity data of the water storage container flowing through the preparation container, when the water quantity flowing through the preparation container is larger than a preset value and the second water level value is larger than or equal to a third water level threshold value, prompting that the addition amount of the purified water in the preparation container reaches the requirement of the preparation density preset value and the liquid amount in the preparation container reaches a high value, stopping adding the purified water into the preparation container at the moment, and stirring the solution in the preparation container for 5-20 min. According to the preparation method of the vehicle urea, the preparation of the urea solution is further controlled by monitoring the flow rate of the purified water, and the accuracy of liquid preparation is further improved. Meanwhile, the liquid level height of the liquid in the preparation container is controlled by setting the third water level threshold in the preparation container, so that the liquid in the preparation container can be effectively prevented from overflowing, and the safety and the sanitation of the liquid preparation are ensured.
In one embodiment, the urea solution with the density value meeting the requirement of the preset value is obtained through the following steps: reading a density value of the urea preparation solution in the preparation container; when the density value is equal to a set value, stopping stirring; and when the density value is smaller than a set value and the stirring time of the urea preparation solution is greater than or equal to 20min, continuously adding urea into the preparation container, and continuously stirring for 5-20 min. Through the steps, when the density value of the urea preparation solution in the preparation container is still smaller than the preset density value after stirring for 5-20 min, the condition that the addition amount of urea in the preparation container is insufficient can be judged, the system automatically calculates the weight of urea particles needing to be supplied according to the water amount in the current preparation container and the density value of the solution, continuously adds urea particles into the preparation container, and continuously stirs until the density value of the urea preparation solution in the preparation container is equal to the set value.
Optionally, when the density value of the urea preparation solution in the preparation container is still smaller than the preset density value after stirring for 5-20 min, at this time, it can be judged that the urea addition amount in the preparation container is insufficient, the system automatically calculates the volume of the urea stock solution to be replenished according to the water amount in the current preparation container, the density value of the urea solution and the density value of the urea stock solution, continuously adds the urea stock solution to the preparation container, and continuously stirs until the density value of the urea preparation solution in the preparation container is equal to the set value.
In one embodiment, the vehicle urea preparation method further includes reading a first water level value of the water storage container and a second water level value of the preparation container, and when the first water level value is smaller than a fourth water level threshold, prompting that water needs to be supplied to the water storage container. In addition, when the second water level value is smaller than the third water level threshold value, it is prompted that the vehicle urea preparation liquid in the preparation container is in a not-full state, at this time, water can be fed into the preparation container to prepare the urea solution, and then water needs to be fed into the water storage container. Through the operation steps, the liquid levels of the water storage container and the preparation container can be kept in a stable state, and the condition of water shortage or liquid shortage is prevented. The operation ensures the continuity of the preparation of the vehicle urea and improves the stability and the reliability of the operation of the preparation method of the vehicle urea.
In one embodiment, the vehicle urea preparation method further comprises the step of reading the secondary water conductivity of water in the water storage container, and performing circulating filtration on the water in the water storage container through a filtration system when the secondary water conductivity is more than 0.10 mS/m. The water quality detector and the filtering system are arranged in the water storage container, so that the water quality in the water storage container can be monitored in real time. When the secondary water conductivity of the water is more than 0.10mS/m, the content of impurities, fixed soluble substances, microorganisms and the like in the purified water is prompted to exceed the standard requirement of water for preparation. At the moment, water in the water storage container is subjected to circulating filtration treatment by the filtration system, so that the cleanliness of water for preparing the urea solution can be effectively guaranteed, and the preparation quality of the automobile urea solution is guaranteed.
In one embodiment, the vehicle urea preparation method further includes: when the vehicle urea preparation starts to be carried out, the water inlet pipeline is flushed for 10-50 seconds in advance. In the preparation method, the filtering system is flushed in advance before the urea solution is prepared, so that accumulated water in the water inlet pipeline can be discharged, and microorganisms or impurities in the accumulated water are prevented from entering the water storage container through the water inlet pipeline, so that the water storage container is polluted or the filtering system is subjected to higher filtering pressure.
In one embodiment, the vehicle urea preparation method further includes: and when the running time of the automobile urea preparation method is more than 3 hours, flushing the water inlet pipeline of the water storage container for 10-100 seconds. Through the operation, a large amount of microorganisms can be prevented from breeding due to accumulated water in the water inlet pipeline, and the cleanliness of the prepared water is guaranteed to a certain extent.
In one embodiment, the vehicle urea preparation method further includes: and acquiring the service life information of the filtering system, and sending prompt information when the service life of the filtering system is greater than or equal to a preset value. In the operation, when the service life of the filtering system is equal to or greater than the preset value, the filtering device is prompted to be replaced so as to ensure the quality of the preparation water, and thus the preparation quality of the automobile urea solution is ensured.
In one embodiment, the water storage container further includes a temperature sensor and a heating device, and the preparation method further includes: and when the fourth water level threshold value is not more than the first water level value and not more than the first water level threshold value, reading the temperature value of the temperature sensor, and when the temperature value is less than 40 ℃, opening the heating device. When the first water level value is between the first water level threshold and the fourth water level threshold, the purified water in the water storage container is sufficiently lifted. At the moment, the heating device is arranged in the water storage container, and when the water temperature is lower than 40 ℃, the heating device is controlled to be started to heat the purified water. The purified water is heated, so that the dissolution or mixing of urea is effectively promoted, and the preparation efficiency of the automobile urea solution is improved. And through setting up temperature sensor, temperature sensor can the water temperature in the real-time supervision water storage container, temperature sensor with the control system electricity is connected, can in time adjust the temperature, prevents the temperature among the water storage container is too high and produces the potential safety hazard, or the temperature crosses the preparation efficiency that influences automobile-used urea solution excessively.
In one embodiment, the liquid storage container is further included, and the preparation method further includes: reading a third water level value in the liquid storage container, and feeding liquid into the liquid storage container by the preparation container when the third water level value is smaller than a fifth water level threshold value; and reading a third water level value in the liquid storage container, and stopping feeding liquid into the liquid storage container by the preparation container when the third water level value is greater than or equal to a sixth water level threshold value. According to the preparation method, the liquid storage container is arranged and used for storing the prepared urea solution, and the prepared urea solution in the preparation container is stored in the liquid storage container, so that the functions of the preparation container and the liquid storage container are further divided, the accurate control of the concentration of the urea solution is facilitated, and the preparation capacity of the urea solution can be further increased. And when a third water level value in the liquid storage container is read and the third water level value is lower than a fifth water level threshold value, the liquid feeding of the liquid preparation container to the liquid storage container is prompted, so that the liquid storage container is kept in a full state, and the liquid shortage condition is prevented. Meanwhile, a sixth water level threshold is arranged in the liquid storage container, when a third water level value in the preparation container is higher than the sixth water level threshold, liquid feeding to the liquid storage container is stopped, so that liquid in the liquid storage container is effectively prevented from overflowing outwards, and the safety and the use sanitation of equipment are improved.
In one embodiment, the dispensing device further comprises a filling gun, wherein the filling gun is connected with the liquid storage container, and the dispensing method further comprises the following steps: receiving a urea solution filling instruction; and reading a third water level value, reading the urea filling amount when a fifth water level threshold value is less than or equal to the third water level value and less than or equal to a sixth water level threshold value, and opening a filling gun to fill the urea solution. In the vehicle urea preparation method, the filling gun is further arranged and is connected with the liquid storage container and used for conveying urea solution to external equipment. The condition that the filling gun conveys the urea solution outwards is that a filling instruction is received, and meanwhile, a third water level value in the liquid storage container meets the condition that a fifth water level threshold value is smaller than or equal to a third water level value and smaller than or equal to a sixth water level threshold value. The automobile-used urea solution volume in the stock solution container is sufficient this moment, guarantees the stability and the continuity of automobile-used urea filling to automobile-used urea filling equipment's use reliability has been promoted.
In one embodiment, the vehicle urea preparation method further includes: and reading the flow data of the filling gun, and closing the filling gun when the filling flow is greater than V-4/60 x 0.5. Through setting the above conditions, the filling amount can be accurately calculated, the influence on the normal operation of external equipment due to excessive filling amount is prevented, and the use reliability of the automobile urea filling equipment is further improved.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The following describes a urea dosing method for a vehicle according to some embodiments of the present invention.
Example 1:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps: reading a first water level value in the water storage container and a second water level value in the preparation container; controlling the preparation container to add urea and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold; and acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value.
According to the vehicle urea preparation method, the data conditions of the water quantity in the water storage container and the urea liquid quantity in the preparation container are obtained by reading the first water level value in the water storage container and the second water level value in the preparation container. When the first water level value in the water storage container is larger than or equal to the first water level threshold value, the fact that the purified water in the water storage container is sufficient is prompted. And when the second water level value is smaller than the second water level threshold value in the preparation container, indicating that the urea solution in the preparation container is insufficient. When the two conditions are met simultaneously, urea is added into the preparation container, and the water storage container is controlled to add purified water into the preparation container, so that the automatic preparation of the automobile urea solution is realized. And monitoring the density value of the liquid in the preparation container, stopping adding the urea and the purified water into the preparation container when the density value of the prepared urea solution reaches a preset value, finishing the preparation of the urea solution and obtaining the vehicle urea preparation solution. Through the realization, the automatic preparation of the urea solution for the vehicle can be realized, and the quality of the prepared urea solution can meet the standard requirement through monitoring the density value of the prepared urea solution.
Preferably, when the first water level value in the water storage container is greater than or equal to the first water level threshold value and the second water level value is smaller than the second water level threshold value in the preparation container, the water storage container is controlled to add purified water into the preparation container to a certain liquid level height, and then urea is controlled to be added into the preparation container, so that the urea is more favorably dissolved.
Optionally, the added urea is urea granules or a urea stock solution, and when the added urea is urea granules, the urea granules are placed in the preparation container from a feeding hole of the preparation container. When the added urea is urea stock solution, the urea stock solution flows into the preparation container through a feed inlet of the preparation container.
Example 2:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps: and reading a first water level value in the water storage container and a second water level value in the preparation container. And based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold, adding urea to the preparation container, and controlling the water storage container to add purified water to the preparation container. And reading the water quantity data flowing through the preparation container from the water storage container, stopping adding purified water into the preparation container when the purified water flowing through the preparation container is more than 80L and the second water level value is more than or equal to the third water level threshold value, and stirring the urea preparation solution in the preparation container for 5-20 min. And then, acquiring the density value of the solution in the preparation container, and stopping stirring when the density value reaches a preset value to obtain the urea preparation solution.
In the method for preparing the vehicle urea, besides reading the first water level value, the second water level value and the solution density value, further reading the water quantity data of the water storage container flowing through the preparation container, when the water quantity flowing through the preparation container is larger than a preset value and the second water level value is larger than or equal to a third water level threshold value, prompting that the addition quantity of the purified water in the preparation container reaches the requirement of the preparation density preset value and the liquid quantity in the preparation container reaches a high value, stopping adding water into the preparation container at the moment, and stirring the solution in the preparation container for 5-20 min. According to the preparation method of the vehicle urea, the preparation of the urea solution is further controlled by monitoring the flow rate of the purified water, and the accuracy of liquid preparation is further improved. Meanwhile, the liquid level height of the liquid in the preparation container is controlled by setting the third water level threshold in the preparation container, so that the liquid in the preparation container can be effectively prevented from overflowing, and the safety and the sanitation of the liquid preparation are ensured.
Example 3:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps: reading a first water level value in the water storage container and a second water level value in the preparation container; and adding urea to the preparation container and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold. And reading the water quantity data flowing through the preparation container from the water storage container, stopping adding water into the preparation container when the water quantity flowing through the preparation container is larger than 80L and the second water level value is larger than or equal to the third water level threshold value, and stirring the urea preparation solution in the preparation container for 5-20 min. And then, obtaining the density value of the solution in the preparation container, and when the density value is smaller than a set value and the stirring time of the urea preparation solution is greater than or equal to 20min, continuously adding urea into the preparation container and continuously stirring for 5-20 min. When the density value is equal to the set value, the stirring is stopped.
Through the steps, when the density value of the urea preparation solution in the preparation container is still smaller than the preset density value after stirring for 5-20 min, the condition that the addition amount of urea in the preparation container is insufficient can be judged, the system automatically calculates the weight of urea particles needing to be supplied according to the water amount in the current preparation container and the density value of the solution, continuously adds urea into the preparation container, and continuously stirs until the density value of the urea preparation solution in the preparation container is equal to the set value.
Optionally, when the density value of the urea preparation solution in the preparation container is still smaller than the preset density value after stirring for 5-20 min, at this time, it can be judged that the urea addition amount in the preparation container is insufficient, the system automatically calculates the volume of the urea stock solution to be replenished according to the water amount in the current preparation container, the density value of the urea solution and the density value of the urea stock solution, continuously adds the urea stock solution to the preparation container, and continuously stirs until the density value of the urea preparation solution in the preparation container is equal to the set value.
Example 4:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps: reading a first water level value in the water storage container and a second water level value in the preparation container; and adding urea to the preparation container and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value.
Through the operation steps, the liquid levels of the water storage container and the preparation container can be kept in a stable state, and the condition of water shortage or liquid shortage is prevented. The operation ensures the continuity of the preparation of the vehicle urea and improves the stability and the reliability of the operation of the preparation method of the vehicle urea.
Example 5:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
a water quality detector and a filtering system are arranged in the water storage container, and the water quality detector is used for detecting the secondary water conductivity of the purified water in the water storage container. And reading the conductivity of the secondary water in the water storage container, reading a first water level value in the water storage container, and reading a second water level value in the preparation container. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container when the first water level value is larger than or equal to the first water level threshold value, the second water level value is smaller than the second water level threshold value, and the secondary water conductivity is smaller than or equal to 0.10 mS/m. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And when the conductivity of the secondary water of the purified water in the water storage container is more than 0.10mS/m, circularly filtering the purified water in the water storage container through a filtering system until the conductivity of the secondary water of the purified water is detected to be less than or equal to 0.10mS/m by a water quality detector in the water storage container, and stopping the water circulation of the filtering system.
The water quality detector and the filtering system are arranged in the water storage container, so that the water quality in the water storage container can be monitored in real time. When the secondary water conductivity of the water is more than 0.10mS/m, the content of impurities, fixed soluble substances, microorganisms and the like in the purified water is prompted to exceed the requirement of a preparation standard. At the moment, water in the water storage container is subjected to circulating filtration treatment by the filtration system, so that the cleanliness of water for preparing the urea solution can be effectively guaranteed, and the preparation quality of the automobile urea solution is guaranteed.
Example 6:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
a water quality detector and a filtering system are arranged in the water storage container, and when the automobile urea preparation method starts to operate, a water inlet pipeline of the water storage container is flushed for 10-50 seconds in advance. And reading the conductivity of the secondary water in the water storage container, reading a first water level value in the water storage container, and reading a second water level value in the preparation container. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container when the first water level value is larger than or equal to the first water level threshold value, the second water level value is smaller than the second water level threshold value, and the secondary water conductivity is smaller than or equal to 0.10 mS/m. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And when the conductivity of the secondary water of the purified water in the water storage container is more than 0.10mS/m, circularly filtering the purified water in the water storage container through a filtering system until the conductivity of the secondary water of the purified water is detected to be less than or equal to 0.10mS/m by a water quality detector in the water storage container, and stopping the water circulation of the filtering system.
In the preparation method, the filtering system is flushed in advance before the urea solution is prepared, so that accumulated water in the water inlet pipeline can be discharged, and microorganisms or impurities in the accumulated water are prevented from entering the water storage container through the water inlet pipeline, so that the water storage container is polluted or the filtering system is subjected to higher filtering pressure.
Example 7:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
a water quality detector and a filtering system are arranged in the water storage container. Reading the secondary water conductivity of the purified water in the water storage container, reading a first water level value in the water storage container, and reading a second water level value in the preparation container. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container when the first water level value is larger than or equal to the first water level threshold value, the second water level value is smaller than the second water level threshold value, and the secondary water conductivity is smaller than or equal to 0.10 mS/m. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. And when the secondary water conductivity is more than 0.10mS/m, circularly filtering the water in the water storage container through the filtering system until the water quality detector in the water storage container detects that the secondary water conductivity of the purified water is less than or equal to 0.10mS/m, and stopping the water circulation of the filtering system. When the preparation running time of the vehicle urea is more than 3 hours, the water inlet pipeline of the water storage container is flushed for 10-100 seconds.
Through the operation, the risk that accumulated water in the water inlet pipeline breeds a large number of microorganisms can be prevented, and the purity of the water for preparation is guaranteed.
Example 8:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
a water quality detector and a filtering system are arranged in the water storage container. And reading the conductivity of the secondary water of the purified water in the water storage container, reading a first water level value in the water storage container, and reading a second water level value in the preparation container. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container when the first water level value is larger than or equal to the first water level threshold value, the second water level value is smaller than the second water level threshold value, and the secondary water conductivity is smaller than or equal to 0.10 mS/m. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And when the conductivity of the secondary water of the purified water in the water storage container is more than 0.10mS/m, circularly filtering the purified water in the water storage container through a filtering system until the conductivity of the secondary water of the purified water is detected to be less than or equal to 0.10mS/m by a water quality detector in the water storage container, and stopping the water circulation of the filtering system. Before urea solution preparation is carried out in each operation, life information of a filtering system is obtained, and when the life of the filtering system is larger than or equal to a preset value, prompt information is sent out.
In the operation, when the service life of the filtering system is equal to or greater than the preset value, the filtering device is prompted to be replaced so as to ensure the quality safety of the preparation water and the preparation quality of the automobile urea solution.
Example 9:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
a water quality detector and a filtering system are arranged in the water storage container, and when the automobile urea preparation method starts to operate, a water inlet pipeline of the water storage container is flushed for 10-50 seconds in advance. And reading the conductivity of the secondary water of the purified water in the water storage container, reading a first water level value in the water storage container, and reading a second water level value in the preparation container. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container when the first water level value is larger than or equal to the first water level threshold value, the second water level value is smaller than the second water level threshold value, and the secondary water conductivity is smaller than or equal to 0.10 mS/m. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And when the conductivity of the secondary water of the purified water in the water storage container is more than 0.10mS/m, circularly filtering the purified water in the water storage container through a filtering system until the conductivity of the secondary water of the purified water is detected to be less than or equal to 0.10mS/m by a water quality detector in the water storage container, and stopping the water circulation of the filtering system. When the preparation running time of the vehicle urea is more than 3 hours, the water inlet pipeline of the water storage container is flushed for 10-100 seconds. Before urea solution preparation is carried out in each operation, life information of a filtering system is obtained, and when the life of the filtering system is larger than or equal to a preset value, prompt information is sent out.
Example 10:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
and reading a first water level value in the water storage container and a second water level value in the preparation container. And controlling the preparation container to add urea and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold. And obtaining the density value of the solution in the preparation container, and obtaining the urea preparation solution when the density value reaches a preset value. The water storage container also comprises a temperature sensor and a heating device, when the fourth water level threshold value is not more than the first water level value and not more than the first water level threshold value, the temperature value of the temperature sensor is read, and when the temperature value is less than 40 ℃, the heating device is started.
And when the first water level value is between the first water level threshold and the fourth water level threshold, prompting that the purified water in the water storage container is sufficient. At the moment, the heating device is arranged in the water storage container, and when the water temperature is lower than 40 ℃, the heating device is controlled to be started to heat the purified water. The purified water is heated, so that the dissolution or mixing of urea is effectively promoted, and the preparation efficiency of the automobile urea solution is improved. And through setting up temperature sensor, temperature sensor can the water temperature in the real-time supervision water storage container, temperature sensor with control system electricity is connected, can in time adjust the temperature, prevents that the temperature in the water storage container is too high and produces the potential safety hazard, or the temperature crosses low preparation efficiency who influences automobile-used urea solution.
Example 11:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
the water storage container comprises a temperature sensor and a heating device, and is used for reading a first water level value in the water storage container and a second water level value in the preparation container. In the preparation process of the vehicle urea, when the fourth water level threshold value is not more than the first water level value and not more than the first water level threshold value, reading the temperature value of the temperature sensor, when the temperature value is less than 40 ℃, starting the heating device, and when the water temperature reaches 40 ℃, stopping heating. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold. And reading the water quantity data flowing through the preparation container from the water storage container, stopping adding water into the preparation container when the water quantity flowing through the preparation container is larger than 80L and the second water level value is larger than or equal to the third water level threshold value, and stirring the urea preparation solution in the preparation container for 5-20 min. And then, acquiring the density value of the solution in the preparation container, and stopping stirring when the density value reaches a preset value to obtain the urea preparation solution.
Example 12:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
the water storage container comprises a temperature sensor and a heating device, and is used for reading a first water level value in the water storage container and a second water level value in the preparation container. In the preparation process of the vehicle urea, when the fourth water level threshold value is not more than the first water level value and not more than the first water level threshold value, reading the temperature value of the temperature sensor, when the temperature value is less than 40 ℃, starting the heating device, and when the water temperature reaches 40 ℃, stopping heating. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold. And reading the water quantity data flowing through the preparation container from the water storage container, stopping adding water into the preparation container when the water quantity flowing through the preparation container is larger than 80L and the second water level value is larger than or equal to the third water level threshold value, and stirring the urea preparation solution in the preparation container for 5-20 min. And then, obtaining the density value of the solution in the preparation container, and when the density value is smaller than a set value and the stirring time of the urea preparation solution is greater than or equal to 20min, continuously adding urea into the preparation container and continuously stirring for 5-20 min. When the density value is equal to the set value, the stirring is stopped.
Example 13:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
the water storage container comprises a temperature sensor and a heating device, and is used for reading a first water level value in the water storage container and a second water level value in the preparation container. In the preparation process of the vehicle urea, when the fourth water level threshold value is not more than the first water level value and not more than the first water level threshold value, reading the temperature value of the temperature sensor, when the temperature value is less than 40 ℃, starting the heating device, and when the water temperature reaches 40 ℃, stopping heating. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value.
Example 14:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
the water quality detector, the filtering system temperature sensor and the heating device are arranged in the water storage container, the secondary water conductivity of the purified water in the water storage container is read, the first water level value in the water storage container is read, and the second water level value in the preparation container is read. In the preparation process of the vehicle urea, when the fourth water level threshold value is not more than the first water level value and not more than the first water level threshold value, reading the temperature value of the temperature sensor, when the temperature value is less than 40 ℃, starting the heating device, and when the water temperature reaches 40 ℃, stopping heating. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container when the first water level value is larger than or equal to the first water level threshold value, the second water level value is smaller than the second water level threshold value, and the secondary water conductivity is smaller than or equal to 0.10 mS/m. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And when the secondary water conductivity of the purified water in the water storage container is more than 0.10mS/m, circularly filtering the purified water by the filtering system until the water quality detector in the water storage container detects that the secondary water conductivity of the purified water is equal to or less than 0.10mS/m, and stopping the water circulation of the filtering system.
Example 15:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
a water quality detector, a filtering system, a temperature sensor and a heating device are arranged in the water storage container. And reading the conductivity of the secondary water of the purified water in the water storage container, reading a first water level value in the water storage container, and reading a second water level value in the preparation container. In the preparation process of the vehicle urea, when the fourth water level threshold value is not more than the first water level value and not more than the first water level threshold value, reading the temperature value of the temperature sensor, when the temperature value is less than 40 ℃, starting the heating device, and when the water temperature reaches 40 ℃, stopping heating. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container when the first water level value is larger than or equal to the first water level threshold value, the second water level value is smaller than the second water level threshold value, and the secondary water conductivity is smaller than or equal to 0.10 mS/m. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And when the secondary water conductivity of the purified water in the water storage container is more than 0.10mS/m, circularly filtering the purified water by the filtering system until the water quality detector in the water storage container detects that the secondary water conductivity of the purified water is less than or equal to 0.10mS/m, and stopping the water circulation of the filtering system. When the preparation running time of the vehicle urea is more than 3 hours, the water inlet pipeline of the water storage container is flushed for 10-100 seconds.
Example 16:
the embodiment discloses a preparation method of urea for vehicles, which comprises the following steps:
a water quality detector, a filtering system, a temperature sensor and a heating device are arranged in the water storage container. And reading the conductivity of the secondary water in the water storage container, reading a first water level value in the water storage container, and reading a second water level value in the preparation container. In the preparation process of the vehicle urea, when the fourth water level threshold value is not more than the first water level value and not more than the first water level threshold value, reading the temperature value of the temperature sensor, when the temperature value is less than 40 ℃, starting the heating device, and when the water temperature reaches 40 ℃, stopping heating. And adding urea to the preparation container and controlling the water storage container to add water to the preparation container when the first water level value is larger than or equal to the first water level threshold value, the second water level value is smaller than the second water level threshold value, and the secondary water conductivity is smaller than or equal to 0.10 mS/m. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. And when the first water level value is smaller than the fourth water level threshold value or the second water level value is smaller than the third water level threshold value, water is fed into the water storage container. And when the conductivity value of the secondary water of the purified water in the water storage container is more than 0.10mS/m, circularly filtering the purified water by the filtering system until the water quality detector in the water storage container detects that the conductivity of the secondary water of the purified water is less than or equal to 0.10mS/m, and stopping the water circulation of the filtering system. Before urea solution preparation is carried out in each operation, life information of a filtering system is obtained, and when the life of the filtering system is larger than or equal to a preset value, prompt information is sent out.
Example 17:
the embodiment discloses a vehicle urea preparation method, which comprises a water storage container, a preparation container and a liquid storage container, and specifically comprises the following steps:
and reading a first water level value in the water storage container and a second water level value in the preparation container. And controlling the preparation container to add urea and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold. And acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. And reading a third water level value in the liquid storage container, and feeding liquid into the liquid storage container by the preparation container when the third water level value is smaller than a fifth water level threshold value. And reading a third water level value in the liquid storage container, and stopping feeding liquid into the liquid storage container by the preparation container when the third water level value is greater than or equal to a sixth water level threshold value.
According to the preparation method, the liquid storage container is arranged and used for storing the prepared urea solution, and the prepared urea solution in the preparation container is stored in the liquid storage container, so that the functions of the preparation container and the liquid storage container are further divided, the accurate control of the concentration of the urea solution is facilitated, and the preparation capacity of the urea solution can be further increased. And reading a third water level value in the liquid storage container, and prompting the preparation container to feed liquid into the liquid storage container when the third water level value is lower than a fifth water level threshold value, so that the liquid storage container is kept in a full state, and the liquid shortage condition is prevented. Meanwhile, the sixth water level threshold is arranged in the liquid storage container, when the third water level value in the preparation container is higher than the sixth water level threshold, liquid feeding to the liquid storage container is stopped, so that liquid in the liquid storage container is effectively prevented from overflowing outwards, and the safety and the use sanitation of the equipment are improved.
Example 18:
the embodiment discloses a vehicle urea preparation method, which comprises a water storage container, a preparation container, a liquid storage container and an injection gun, wherein the injection gun is connected with the liquid storage container, and the method specifically comprises the following steps:
receiving a urea solution filling instruction; and reading a third water level value, reading the urea filling amount when a fifth water level threshold value is less than or equal to the third water level value and less than or equal to a sixth water level threshold value, and opening a filling gun to fill the urea solution. When a urea solution filling instruction is not received, reading a first water level value in the water storage container and reading a second water level value in the preparation container; controlling the preparation container to add urea and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold; and acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value. Reading a third water level value in the liquid storage container, and feeding liquid into the liquid storage container by the preparation container when the third water level value is smaller than a fifth water level threshold value; and reading a third water level value in the liquid storage container, and stopping feeding liquid into the liquid storage container by the preparation container when the third water level value is greater than or equal to a sixth water level threshold value.
In the vehicle urea preparation method, the filling gun is further arranged and is connected with the liquid storage container and used for conveying urea solution to external equipment. The condition that the filling gun conveys the urea solution outwards is that a filling instruction is received, and meanwhile, a third water level value in the liquid storage container meets the condition that a fifth water level threshold value is smaller than or equal to a third water level value and smaller than or equal to a sixth water level threshold value. The automobile-used urea solution volume in the stock solution container is sufficient this moment, guarantees the stability and the continuity of automobile-used urea filling to automobile-used urea filling equipment's use reliability has been promoted.
Example 19:
the embodiment discloses a vehicle urea preparation method, which comprises a water storage container, a preparation container, a liquid storage container and an injection gun, wherein the injection gun is connected with the liquid storage container, and the method specifically comprises the following steps:
and receiving a urea solution filling instruction, reading a third water level value, reading urea filling amount when a fifth water level threshold value is less than or equal to a third water level value and less than or equal to a sixth water level threshold value, and opening a filling gun to fill the urea solution. The flow data of the filling gun is read, and when the filling flow is more than V-4/60 x 0.5, the filling gun is closed.
When a urea solution filling instruction is not received, reading a first water level value in the water storage container and reading a second water level value in the preparation container; controlling the preparation container to add urea and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to the first water level threshold and the second water level value being less than the second water level threshold; and acquiring the density value of the solution in the preparation container, and acquiring the urea preparation solution when the density value reaches a preset value.
Reading a third water level value in the liquid storage container, and feeding liquid into the liquid storage container by the preparation container when the third water level value is smaller than a fifth water level threshold value; and reading a third water level value in the liquid storage container, and stopping feeding liquid into the liquid storage container by the preparation container when the third water level value is greater than or equal to a sixth water level threshold value.
Through setting the above conditions, the filling amount can be accurately calculated, the influence on the normal operation of external equipment due to excessive filling amount is prevented, and the use reliability of the automobile urea filling equipment is further improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A preparation method of urea for vehicles is characterized by comprising the following steps:
reading a first water level value in the water storage container and a second water level value in the preparation container;
controlling the preparation container to add urea and controlling the water storage container to add water to the preparation container based on the first water level value being greater than or equal to a first water level threshold and the second water level value being less than a second water level threshold;
and obtaining the density value of the solution in the preparation container, and obtaining the urea preparation solution when the density value reaches a preset value.
2. The urea preparation method for vehicles according to claim 1, further comprising a stirring device, the preparation method further comprising:
and reading the water quantity data flowing through the preparation container from the water storage container, stopping adding water into the preparation container when the water quantity flowing through the preparation container is larger than a preset value and the second water level value is larger than or equal to a third water level threshold value, and stirring the urea preparation solution in the preparation container for 5-20 min.
3. The urea preparation method for vehicles according to claim 2, wherein the obtaining of the density value of the solution in the preparation container and the obtaining of the urea preparation solution when the density value reaches a preset value specifically comprises:
reading a density value of the urea preparation solution in the preparation container;
when the density value is equal to a set value, stopping stirring;
and when the density value is smaller than a set value and the stirring time of the urea preparation solution is greater than or equal to 20min, continuously adding urea into the preparation container, and continuously stirring for 5-20 min.
4. The urea formulation method for a vehicle according to claim 1, further comprising:
and reading a first water level value of the water storage container and a second water level value of the preparation container, and when the first water level value is smaller than a fourth water level threshold value or the second water level value is smaller than a third water level threshold value, the water storage container is filled with water.
5. The urea preparation method for vehicles according to claim 4, wherein the water storage container further comprises a water quality detector and a filtering system, and the preparation method further comprises:
and reading the secondary water conductivity of the water in the water storage container, and when the secondary water conductivity is more than 0.10mS/m, circularly filtering the water in the water storage container through a filtering system.
6. The urea formulation method for vehicles according to claim 5, further comprising:
when the vehicle urea preparation method starts to operate, a water inlet pipeline of the water storage container is flushed for 10-50 seconds in advance; and/or
When the running time of the automobile urea preparation method is more than 3 hours, flushing a water inlet pipeline of the water storage container for 10-100 seconds; and/or
And acquiring the service life information of the filtering system, and sending prompt information when the service life of the filtering system is greater than or equal to a preset value.
7. A urea dosing method for a vehicle according to any one of claims 1-6, wherein said water reservoir further comprises a temperature sensor and a heating device, said dosing method further comprising:
and when the fourth water level threshold value is not more than the first water level value and not more than the first water level threshold value, reading the temperature value of the temperature sensor, and when the temperature value is less than 40 ℃, opening the heating device.
8. The urea formulation method for a vehicle according to claim 1, further comprising a reservoir, the formulation method further comprising:
reading a third water level value in the liquid storage container, and feeding liquid into the liquid storage container by the preparation container when the third water level value is smaller than a fifth water level threshold value;
and reading a third water level value in the liquid storage container, and stopping feeding liquid into the liquid storage container by the preparation container when the third water level value is greater than or equal to a sixth water level threshold value.
9. The urea preparation method for vehicles according to claim 8, further comprising a filling gun connected to the liquid storage container, the preparation method further comprising:
receiving a urea solution filling instruction;
and reading a third water level value, reading the urea filling amount when a fifth water level threshold value is less than or equal to the third water level value and less than or equal to a sixth water level threshold value, and opening a filling gun to fill the urea solution.
10. The urea formulation method for a vehicle according to claim 9, further comprising:
and reading the flow data of the filling gun, and closing the filling gun when the filling flow is greater than V-4/60 x 0.5.
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| CN108571358A (en) * | 2017-03-07 | 2018-09-25 | 马涅蒂-马瑞利公司 | The method and apparatus that storage tank for from the exhaust system to the exhaust after-treatment for providing internal combustion engine supplies water |
| CN109939566A (en) * | 2019-04-16 | 2019-06-28 | 灵谷化工集团有限公司 | A kind of low temperature resistant urea for vehicle solution of crystallization-preventive and preparation method thereof |
| CN111852625A (en) * | 2019-04-29 | 2020-10-30 | 大宇造船海洋株式会社 | Urea solution production device and method for SCR of ship |
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| CN108571358A (en) * | 2017-03-07 | 2018-09-25 | 马涅蒂-马瑞利公司 | The method and apparatus that storage tank for from the exhaust system to the exhaust after-treatment for providing internal combustion engine supplies water |
| CN109939566A (en) * | 2019-04-16 | 2019-06-28 | 灵谷化工集团有限公司 | A kind of low temperature resistant urea for vehicle solution of crystallization-preventive and preparation method thereof |
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Application publication date: 20211029 |