CN215830572U - Solid ammonia system and vehicle - Google Patents

Abstract

The utility model relates to a solidified ammonia system and a vehicle, wherein the solidified ammonia system comprises an ammonia storage tank which is arranged in an exhaust pipe, a first solid ammonia storage material is stored in the ammonia storage tank, and the first solid ammonia storage material is constructed to release ammonia gas under the action of heat of tail gas in the exhaust pipe; the supply tank is arranged outside the exhaust pipe and is communicated with the ammonia storage tank, and a second solid ammonia storage material is stored in the supply tank; and a heater controlled to heat the second solid ammonia storage material to release ammonia gas to replenish the ammonia storage tank. According to the ammonia curing system and the vehicle, the ammonia storage tank can release ammonia gas from tail gas heat in the exhaust pipe when the vehicle is in cold start so as to meet the emission limit requirement in cold start, and the ammonia gas can be timely supplemented to the ammonia storage tank through the supply tank during the running process of the vehicle, so that the ammonia gas can be continuously and stably injected to treat the tail gas.

Description

Solid ammonia system and vehicle

Technical Field

The utility model relates to the technical field of automobile exhaust treatment equipment, in particular to a solid ammonia system and a vehicle.

Background

At present, the national standard of the tail gas emission of commercial vehicles has fully entered six times of China, and the Selective Catalytic Reduction (SCR) technology is the preferred technical route for the post-treatment of the commercial vehicles no matter light vehicles, medium vehicles and heavy vehicles, and non-road four-stage vehicles.

In the SCR operation, a liquid urea aqueous solution is required to be used as a reducing agent to eliminate NOx in engine exhaust gas, but the production threshold of the liquid urea aqueous solution is low, the quality is uneven, and the liquid urea aqueous solution has active chemical properties in use, so that the problems of coking and nozzle blockage are easily caused. Therefore, solid ammonia has become the first choice for application in SCR operations as a reductant instead of liquid aqueous urea.

However, the existing solid ammonia cannot meet the requirement of the emission limit value of the cold start of the vehicle because the ammonia gas cannot be timely and accurately supplied to the SCR postprocessor to eliminate the nitrogen oxide during the cold start.

SUMMERY OF THE UTILITY MODEL

Therefore, the solidification ammonia system and the vehicle which can timely judge the impurity blockage phenomenon of the urea heating electromagnetic valve and ensure the driving safety of a user are provided, aiming at the problems that the existing urea heating electromagnetic valve is difficult to observe and disassemble due to the impurity blockage in the cooling liquid, the internal structure of the urea heating electromagnetic valve is complex, a service station and the user cannot timely judge whether the impurity blockage problem occurs or not, and the problem that the driving of the user brings certain potential safety hazard is solved.

In one aspect of the present application, there is provided a solidified ammonia system comprising:

an ammonia storage tank mounted within the exhaust pipe, the ammonia storage tank storing a first solid ammonia storage material configured to release ammonia gas under heat of exhaust gas within the exhaust pipe;

the supply tank is arranged outside the exhaust pipe and is communicated with the ammonia storage tank, and a second solid ammonia storage material is stored in the supply tank; and

a heater controlled to heat the second solid ammonia storage material to release ammonia gas to replenish the ammonia storage tank.

In one embodiment, the ammonia storage tank is arranged in the exhaust pipe in an elongated shape.

In one embodiment, a reinforcing structure is arranged between the ammonia storage tank and the exhaust pipe.

In one embodiment, the first solid ammonia storage material comprises one of an ammine compound of a chloride of strontium, magnesium, calcium, barium, or aluminum.

In one embodiment, the first solid ammonia storage material comprises calcium ammine chloride.

In one embodiment, the second solid ammonia storage material comprises one of an ammine compound of a chloride of strontium, magnesium, calcium, barium or aluminum.

In one embodiment, the second solid ammonia storage material comprises calcium ammine chloride.

In one embodiment, the ammonia solidification system further comprises a first one-way valve, wherein the first one-way valve is arranged on a connecting pipeline between the ammonia storage tank and the supplement tank so as to allow the supplement tank to supply ammonia gas to the ammonia storage tank in one way.

In one embodiment, the ammonia solidifying system further comprises an ammonia gas metering controller and an injection branch for injecting ammonia gas into the exhaust pipe, and the ammonia storage tank is connected with the injection branch and used for supplying ammonia gas to the injection branch;

and the ammonia metering valve is arranged on the injection branch and is controlled by the ammonia metering controller to adjust the ammonia flow in the injection branch.

In one embodiment, the ammonia solidification system further comprises a second one-way valve arranged on the injection branch, and the second one-way valve allows the ammonia storage tank to supply ammonia gas to the exhaust pipe in one way.

In another aspect of the present application, there is also provided a vehicle comprising the solidified ammonia system described above.

Above-mentioned solidification ammonia system and vehicle, in the twinkling of an eye that the vehicle started, the heat of tail gas can transmit the first solid ammonia storage material in the ammonia storage tank for first solid ammonia storage material is heated and releases the ammonia, and discharges the ammonia in the blast pipe fast, and then reacts with tail gas and generates pollution-free nitrogen and water vapour, so reduced the emission pollution of cold start. After the vehicle operation a period, accessible control heating pipe heating is mended intraductal second solid ammonia storage material to release the ammonia and carry out the ammonia to the ammonia storage tank and supply, so can be at the vehicle in-process of traveling, continuously to the intraductal injection ammonia of exhaust, then continuously handle tail gas.

Therefore, the solidified ammonia system and the vehicle not only can meet the emission limit requirement of cold start of the vehicle, but also can continuously and stably inject ammonia gas to treat tail gas in the running process of the vehicle.

Drawings

FIG. 1 is a block diagram schematically illustrating the construction of a ammonia curing system in one embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

FIG. 1 is a block diagram showing a schematic structure of a system for solidifying ammonia in one embodiment of the present invention. For the purpose of illustration, the drawings show only the structures associated with embodiments of the utility model.

Referring to the drawings, an embodiment of the present invention provides a solidified ammonia system 100 including an ammonia storage tank 10, a make-up tank 20, and a heater 30. Specifically, the ammonia curing system 100 of the present application is used for injecting ammonia gas into the exhaust pipe, so that ammonia gas can enter the SCR post-treatment tank 200 communicated therewith, and automobile exhaust gas also enters the SCR post-treatment tank 20 communicated therewith from the exhaust pipe 300 of the vehicle, so that ammonia gas and nitrogen oxides in the automobile exhaust gas react in the SCR post-treatment tank 200 to generate pollution-free nitrogen and water vapor, thereby purifying exhaust gas, and discharging clean exhaust gas from the outlet pipe at the other end of the SCR post-treatment tank 200.

The ammonia storage tank 10 is installed in the exhaust pipe 300, and the ammonia storage tank 10 stores therein a first solid ammonia storage material configured to release ammonia gas under the heat of the exhaust gas of the exhaust pipe 300.

The supply tank 20 is disposed outside the exhaust pipe 300 and is communicated with the ammonia storage tank 10, the supply tank 20 stores a second solid ammonia storage material, and the heater 30 is controlled to heat the second solid ammonia storage material to release ammonia gas to supply to the ammonia storage tank 10. In the embodiment of the present application, the volume of the replenishment tank 20 should be larger than the volume of the ammonia storage tank 10 so that ammonia gas can be continuously supplied to the ammonia storage tank 10 for a long time. It should also be noted that the make-up tank 20 needs to be filled with ammonia filling treatment in addition to the second solid ammonia storage material, in order to continue to replenish the ammonia storage tank 10 with ammonia gas.

So, in the twinkling of an eye that the vehicle started, the heat of tail gas can transmit the first solid ammonia storage material in storing up ammonia jar 10 for first solid ammonia storage material is heated and releases the ammonia, and discharges the ammonia in to the blast pipe fast, and then reacts with tail gas and generates pollution-free nitrogen gas and steam, so reduced the emission pollution of cold start. After the vehicle runs for a period of time, the second solid ammonia storage material in the supply pipe 20 can be heated by controlling the heating pipe 30 to release ammonia gas to supplement the ammonia gas to the ammonia storage tank 10, so that the ammonia gas can be continuously injected into the exhaust pipe 20 in the running process of the vehicle, and then the tail gas is continuously treated.

Therefore, the ammonia solidification system 100 of the present application not only can meet the emission limit requirement of the vehicle in cold start, but also can continuously and stably inject ammonia gas to treat the tail gas in the vehicle running process.

In some embodiments, the ammonia storage tank 10 is elongated in order that the placement of the ammonia storage tank 10 within the exhaust pipe 300 does not affect the exhaust back pressure of the exhaust pipe 300. Specifically, the length-width ratio of the ammonia storage tank 10 is 10-12.

Further, a reinforcing structure 40 is provided between the ammonia storage tank 10 and the exhaust pipe 300. Because the ammonia storage tank 10 is in a strip structure and the exhaust pipe 300 can vibrate in the exhaust process, the reinforcing structure 40 can reduce the vibration of the ammonia storage tank 10 during running and improve the installation stability of the ammonia storage tank 10. Specifically, the reinforcing structure includes a plurality of reinforcing ribs disposed at intervals in the longitudinal direction of the exhaust pipe, and the ammonia storage tank 10 is mounted on the inner wall of the exhaust pipe 300 through the plurality of reinforcing ribs. More specifically, the reinforcing ribs are welded to the exhaust pipe 300 and the ammonia storage tank 10.

In some embodiments, the ammonia storage tank 10 is a stainless steel ammonia storage tank. Thus, the ammonia storage tank can be prevented from being damaged due to rusting caused by moisture.

In some embodiments, the ammonia curing system 100 further comprises an inlet pipe 50 and an outlet pipe 60, wherein one end of the inlet pipe 50 is connected to the inlet of the ammonia storage tank 10, the other end is connected to a first opening of the outlet pipe 300, one end of the outlet pipe 60 is connected to the outlet of the ammonia storage tank 10, and the other end is connected to a second opening of the outlet pipe 300. Specifically, the two ends of the air inlet pipe 50 are respectively provided with a first flange, the two ends of the air inlet pipe 50 are respectively connected with the air inlet and the first opening through the first flange, the two ends of the air outlet pipe 40 are respectively provided with a second flange, and the two ends of the air outlet pipe 60 are respectively connected with the air outlet and the second opening through the second flange. The flange connection mode is more stable and reliable.

Similarly, to avoid the air inlet tube 50 and the air outlet tube 60 from being damaged by moisture and rust, the air inlet tube 50 is a stainless steel air inlet tube, and the air outlet tube 60 is a stainless steel air outlet tube.

In some embodiments, the ammonia curing system 100 further comprises a first check valve 65, wherein the first check valve 65 is disposed on the connection line between the ammonia storage tank 10 and the replenishment tank 20 to allow the replenishment tank 20 to supply ammonia gas to the ammonia storage tank 10 in one direction.

It is also noted that, during the running of the vehicle, the exhaust gas quantity of the exhaust pipe 300 is sufficient, and therefore, the heating temperature to which the inside of the ammonia storage tank 10 is subjected is high, so that, in the normal case, the pressure of the gas in the ammonia storage tank 10 is higher than that of the replenishment tank 20, and is restricted by the first check valve 65, it is difficult for the replenishment tank 20 to spontaneously supply ammonia gas to the ammonia storage tank 10, however, after the vehicle stops running, the temperature of the exhaust pipe 300 decreases, the temperature and the pressure in the ammonia storage tank 10 both decrease, the first solid ammonia storage material is in a lean ammonia state, for example, the original 8 ammine compound may be changed into 2 ammine compound, and at this time, the first solid ammonia storage material has strong adsorption capacity to ammonia gas, and the free ammonia molecules in the ammonia storage tank 10 are adsorbed, negative pressure is generated in the ammonia storage tank 10, the first one-way valve 65 is opened under pressure, and the ammonia gas in the replenishment tank 20 is spontaneously conveyed to the ammonia storage tank 10, so that the automatic ammonia replenishment of the ammonia storage tank 10 is realized.

In some embodiments, the first solid ammonia storage material comprises one of an ammine compound of a chloride of strontium, magnesium, calcium, barium, or aluminum. Preferably, the first solid ammonia storage material comprises calcium ammine chloride. The ammoniacal compound of calcium chloride is more sensitive to temperature, can release ammonia gas under the heating condition of 30-40 ℃, can ensure that the ammonia supply temperature can be reached at the moment of vehicle starting, and is favorable for reducing cold start emission pollution.

In some embodiments, the second solid ammonia storage material may also include one of an ammine compound of a chloride of strontium, magnesium, calcium, barium, or aluminum. Preferably, the second solid ammonia storage material comprises calcium ammine chloride.

In some embodiments, the heater 30 comprises an electrical heating rod extending into the interior of the supply tank 20 to heat the second solid ammonia storage material, and in other embodiments, the heater 30 may also comprise a heating jacket covering the exterior of the supply tank 20, which is not limited herein.

In some embodiments, the ammonia curing system 100 further includes an ammonia gas metering controller (DCU)70 and an ammonia gas injection branch 75 for injecting ammonia gas into the exhaust pipe, the ammonia tank 10 is connected to the ammonia gas injection branch 75 for supplying ammonia gas to the ammonia gas injection branch 75, the ammonia gas injection branch 75 is provided with an ammonia gas metering valve 80, and the ammonia gas metering valve 80 is controlled by the ammonia gas metering controller 70 to adjust the flow rate of ammonia gas in the ammonia gas injection branch 75.

In the specific application of this embodiment, when the vehicle is cold started, the ammonia storage tank 10 is first heated, and the first solid ammonia storage material therein can rapidly release ammonia gas to reach the release pressure, and the ammonia gas is directly and rapidly injected into the exhaust pipe 300 to the SCR aftertreatment housing 20 under the precise control of the ammonia gas metering valve 80 by the strategy set by the ammonia gas metering controller 70.

In some embodiments, the injection branch 75 is further provided with a second check valve 85, and the second check valve 85 allows the ammonia storage tank 10 to supply ammonia gas to the exhaust pipe 300 in a single direction. In this way, the air in the exhaust pipe 300 can be prevented from flowing back into the ammonia storage tank 10.

Based on the same inventive concept, the present application also provides a vehicle comprising the ammonia curing system 100 described above.

Compared with the prior art, the ammonia curing system 100 and the vehicle provided by the embodiment of the utility model have the following beneficial effects:

at the moment of vehicle start, the heat of tail gas can transmit to the first solid ammonia storage material in the ammonia storage tank 10 for first solid ammonia storage material is heated and releases the ammonia, and discharges the ammonia to the blast pipe fast, and then reacts with tail gas and generates pollution-free nitrogen and water vapour, so reduced the emission pollution of cold start. After the vehicle runs for a period of time, the second solid ammonia storage material in the supply pipe 20 can be heated by controlling the heating pipe 30 to release ammonia gas to supplement the ammonia gas to the ammonia storage tank 10, so that the ammonia gas can be continuously injected into the exhaust pipe 20 in the running process of the vehicle, and then the tail gas is continuously treated.

Therefore, the ammonia solidification system 100 and the vehicle can not only meet the emission limit requirement of the cold start of the vehicle, but also continuously and stably inject ammonia gas to treat tail gas in the running process of the vehicle.

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 utility model. 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 (11)

1. A solidified ammonia system, comprising:

an ammonia storage tank mounted within the exhaust pipe, the ammonia storage tank storing a first solid ammonia storage material configured to release ammonia gas under heat of exhaust gas within the exhaust pipe;

the supply tank is arranged outside the exhaust pipe and is communicated with the ammonia storage tank, and a second solid ammonia storage material is stored in the supply tank; and

a heater controlled to heat the second solid ammonia storage material to release ammonia gas to replenish the ammonia storage tank.

2. The ammonia curing system of claim 1, wherein the ammonia storage tank is elongated and disposed within the exhaust pipe.

3. The ammonia curing system of claim 2, wherein a reinforcing structure is further provided between the ammonia storage tank and the exhaust pipe.

4. The solidified ammonia system of claim 1, wherein the first solid ammonia storage material comprises one of an ammine compound of a chloride of strontium, magnesium, calcium, barium, or aluminum.

5. The solidified ammonia system of claim 4, wherein the first solid ammonia storage material comprises an ammoniated compound of calcium chloride.

6. The solidified ammonia system of claim 1, wherein the second solid ammonia storage material comprises one of an ammine compound of a chloride of strontium, magnesium, calcium, barium, or aluminum.

7. The solidified ammonia system of claim 6, wherein the second solid ammonia storage material comprises calcium ammine chloride.

8. The ammonia curing system of claim 1, further comprising a first one-way valve disposed on a connection line between the ammonia storage tank and the make-up tank to allow the make-up tank to provide ammonia gas to the ammonia storage tank in one way.

9. The ammonia curing system of claim 1, further comprising an ammonia gas metering controller and an ammonia gas injection branch for injecting ammonia gas into the exhaust pipe, wherein the ammonia storage tank is connected with the ammonia gas injection branch for supplying ammonia gas to the ammonia gas injection branch;

and the ammonia metering valve is arranged on the injection branch and is controlled by the ammonia metering controller to adjust the ammonia flow in the injection branch.

10. The ammonia curing system of claim 9, further comprising a second one-way valve disposed on the injection branch, the second one-way valve allowing the ammonia storage tank to provide ammonia gas to the exhaust pipe in one way.

11. A vehicle comprising a cured ammonia system according to any one of claims 1 to 10.

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