Uniform dispersion device for mixed liquid of automotive urea storage tank
By using nitrogen bubbling circulation and tail gas treatment system in the urea storage tank, the problems of long time and high power consumption in uniform dispersion of urea solution are solved, and efficient and low-cost urea solution production is achieved.
Patent Information
- Application Number
- CN202422654614.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In the existing technology, the uniform dispersion process of automotive urea solution is time-consuming and consumes a lot of power, which makes it difficult to meet the needs of efficient production.
The nitrogen bubbling circulation method is adopted to use cheap nitrogen to mix the liquid in the urea storage tank, and the gas is reused in combination with the exhaust gas treatment system to improve mixing efficiency and reduce power consumption.
The nitrogen bubbling circulation method shortens the mixing time, reduces power consumption, improves the mixing efficiency of the urea solution and the gas utilization rate, and reduces production costs.
Smart Images
Figure CN223439682U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to urea treatment technical field, concretely relates to a vehicle urea storage tank mixed solution uniform dispersion device. BACKGROUND
[0002] Vehicle urea solution can convert harmful nitrogen oxides emitted by diesel engines into harmless water vapor and nitrogen, effectively reducing the exhaust emissions of diesel engines. Under the advocacy of low-carbon emission reduction, the sales of vehicle urea show a significant growth trend, and with the improvement of global environmental awareness, the concepts of carbon neutralization and carbon peak are introduced and implemented in turn, and the demand for vehicle urea will continue to increase.
[0003] To ensure that the vehicle urea is uniform and stable, the vehicle urea concentration, solution uniformity, temperature and other production process parameters are strictly required. Vehicle urea can be produced by industrial urea and deionized water. The urea solution produced by the urea production device is diluted to near the standard concentration by deionized water, and then sent to the vehicle urea solution storage tank by the liquid pump. The urea solution in the storage tank is circulated by the circulating pump, and then cooled to 50 DEG C by the external heat exchanger. Finally, according to the urea solution concentration, a calculated amount of deionized water is added for dilution, and the solution is dispersed uniformly by stirring and pump circulation to obtain a vehicle urea solution with a mass concentration of 32.5±0.5%, which can be filled after analysis.
[0004] During the production of vehicle urea solution by the urea production device, the dilution of urea solution in the storage tank with deionized water is a key step. At present, after adding an appropriate amount of deionized water according to the urea solution concentration, stirring and pump circulation are used for uniform dispersion. This process takes a long time and consumes a lot of power. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model embodiment provides a vehicle urea storage tank mixed solution uniform dispersion device to solve the problems in the prior art.
[0006] In order to achieve the above purpose, the utility model embodiment provides the following technical scheme:
[0007] A vehicle urea storage tank mixed solution uniform dispersion device, comprising:
[0008] The urea storage tank unit comprises a tank body, and the outside of the tank body is provided with a tank body temperature sensor, a tank body pressure gauge, a tank body pressure sensor, a tank body liquid level sensor and a tank body gas outlet valve;
[0009] The tail gas treatment unit comprises a condenser, a reflux tank, a reflux pump and an activated carbon adsorption box, a tank body gas outlet valve on the tank body is connected with the condenser, two outlets of the condenser are connected with the reflux tank and the activated carbon adsorption box respectively, and one outlet of the reflux tank is also connected with the activated carbon adsorption box, and the other outlet of the reflux tank is connected to the tank body through the reflux pump;
[0010] The gas storage unit comprises a circulating compressor, a gas storage tank and a gas source pipe, the circulating compressor is connected with the activated carbon adsorption box, the circulating compressor is also connected with a nitrogen source, an outlet end of the circulating compressor is connected to an inlet end of the gas storage tank, and an outlet end of the gas storage tank is connected to the bottom of the tank body.
[0011] Optionally, a nitrogen distributor is arranged on the inner bottom of the tank body to uniformly disperse the input nitrogen.
[0012] Optionally, an inner circulation pipe is arranged in the tank body to separate the rising gas bubbles from the descending liquid.
[0013] Optionally, a gas cover is arranged below the inner circulation pipe and above the nitrogen distributor in the tank body to prevent the nitrogen from entering the inner circulation pipe.
[0014] Optionally, a weir is arranged on the upper portion of the inner circulation pipe to improve the liquid collection effect.
[0015] The present application has at least the following advantages:
[0016] The circulating compressor is connected with the nitrogen source, the inexpensive nitrogen is used to pass into the tank body, the solution is mixed in the tank body, the urea solution and water vapor in the gas are cooled into liquid after the tail gas is treated by the condenser, the liquid flows into the reflux tank, the dry gas is treated by the activated carbon adsorption box to remove the ammonia in the tail gas, the pure nitrogen is recycled by the circulating compressor and the gas storage tank into the vehicle urea storage tank, the mixing efficiency of the vehicle urea storage tank solution is improved, the tail gas is treated and recycled, the gas utilization rate is improved, and the power consumption and production cost of the production device are reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the prior art and the present application, the drawings needed in the description of the prior art and the present application embodiment will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.
[0018] The structures, proportions, sizes, etc. shown in the specification are merely used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the utility model. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.
[0019] Figure 1 The schematic diagram of the principle structure of an embodiment of the utility model.
[0020] Explanation of reference signs:
[0021] 1, tank body; 2, storage tank inlet valve; 3, gas tank; 4, reflux tank; 5, condenser; 6, tank body gas inlet valve; 7, reflux pump; 8, circulating compressor; 9, tank body gas outlet valve; 10, tank body pressure gauge; 11, tank body pressure sensor; 12, tank body liquid level sensor; 13, tank body temperature sensor; 14, storage tank breather valve; 15, storage tank pressure gauge; 16, reflux flap liquid level gauge; 17, internal circulation pipe; 18, nitrogen distributor; 19, activated carbon adsorption box; 20, gas cover; 21, nitrogen source; 22, nitrogen check valve; 23, reflux outlet check valve; 24, reflux inlet filter; 25, circulating cooling water outlet; 26, circulating cooling water inlet; 27, reflux pressure sensor; 28, reflux liquid level sensor. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.
[0023] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two. The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the utility model and the above-mentioned drawings are intended to distinguish the objects referred to. For the scheme with time sequence flow, this kind of term expression method should not be understood as describing a specific order or sequence, and for the scheme of device structure, this kind of term expression method does not distinguish importance, position relationship, etc.
[0024] Furthermore, the terms "comprise", "comprising", "have", "having", "include", "including", "contain", "containing", "provide", "providing", "carry", "carrying", "comprise" and their any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus that comprises a list of steps or units are not necessarily limited to those steps or units explicitly listed, but can include other steps or units that are not expressly listed or inherent to such process, method, product or apparatus, or added further based on optimization of the present invention.
[0025] As shown in Figure 1 The urea tank unit is connected to the outlet valve of the storage tank 3, the storage tank 3 is used for storing nitrogen gas of the nitrogen source 21 and nitrogen gas after exhaust gas treatment, the inlet valve of the storage tank 3 is connected to the outlet valve of the circulating compressor 8, the circulating compressor 8 has two inlet valves, one is connected to the nitrogen source 21, and the other is connected to the outlet valve of the activated carbon adsorption box 19, the circulating compressor 8 is used for stabilizing the pressure of the nitrogen gas storage tank 3, and ensures that the nitrogen gas pressure is stably output in the circulating process; and the pipeline connected to the nitrogen source 21 is further provided with a nitrogen check valve 22, nitrogen backflow is prevented, and a storage tank pressure gauge 15 is arranged on the storage tank 3 and is used for observing the pressure of the storage tank 3; the storage tank 3 is further provided with a storage tank breather valve 14, and the pressure in the storage tank 3 is adjusted.
[0026] The urea tank unit is connected to the outlet valve of the storage tank 3, the storage tank 3 is used for storing nitrogen gas of the nitrogen source 21 and nitrogen gas after exhaust gas treatment, the inlet valve of the storage tank 3 is connected to the outlet valve of the circulating compressor 8, the circulating compressor 8 has two inlet valves, one is connected to the nitrogen source 21, and the other is connected to the outlet valve of the activated carbon adsorption box 19, the circulating compressor 8 is used for stabilizing the pressure of the nitrogen gas storage tank 3, and ensures that the nitrogen gas pressure is stably output in the circulating process; and the pipeline connected to the nitrogen source 21 is further provided with a nitrogen check valve 22, nitrogen backflow is prevented, and a storage tank pressure gauge 15 is arranged on the storage tank 3 and is used for observing the pressure of the storage tank 3; the storage tank 3 is further provided with a storage tank breather valve 14, and the pressure in the storage tank 3 is adjusted.
[0027] The inlet valve of the activated carbon adsorption tank 19 divides two gas inlet pipelines, one of which is connected to the outlet valve of the reflux tank 4, and the other is connected to the outlet valve of the condenser 5, and the activated carbon adsorption tank 19 dries the gas treated by the condenser 5 after the urea solution and water vapor; the condenser 5 is also provided with an outlet valve connected to the inlet valve of the reflux tank 4, and the liquid enters the reflux tank 4, and the inlet valve of the condenser 5 is connected to the tank gas outlet valve 9 at the top of the tank body 1.
[0028] The bottom of the tank body 1 is provided with a nitrogen distributor 18 for uniformly dispersing the input nitrogen.
[0029] The above-mentioned nitrogen distributor 18 is arranged at the bottom of the tank body 1, and the nitrogen entering through the tank inlet valve 6 is uniformly distributed to make the nitrogen uniformly dispersed into the tank body 1, thereby improving the mixing efficiency with the solution.
[0030] The tank body 1 is provided with an internal circulation pipe 17 for separating the rising bubbles from the descending liquid.
[0031] The circulation pipe is installed in the tank body 1, and the bubbles in the tank body 1 can rise along the outside of the internal circulation pipe 17 from the bottom of the tank body 1, thereby driving the urea solution outside the internal circulation pipe 17 to rise to the top end of the internal circulation pipe 17 and flow into the inside of the internal circulation pipe 17, which hinders the circulation of the liquid in the tank body 1, and the continuous input of nitrogen circulates the urea solution at the bottom to the top, and the urea solution at the top flows into the bottom, thereby realizing high-efficiency circulation of the urea solution in the vehicle urea storage tank.
[0032] The tank body 1 is provided with a gas cover 20 below the internal circulation pipe 17 and above the nitrogen distributor 18 to prevent nitrogen from entering the inside of the internal circulation pipe 17.
[0033] The internal circulation pipe 17 is provided with a weir at the upper portion to improve the liquid collection effect.
[0034] The high-concentration urea solution is introduced into the tank body 1 from the urea device, the tank liquid level is observed by the tank liquid level sensor 12, the liquid introduction is stopped when the liquid level reaches a certain level, a proper amount of deionized water is added into the tank body 1, and finally the mixture is uniformly mixed.
[0035] The nitrogen source 21 pipe network nitrogen is input into the gas tank 3 through the circulating compressor 8 after the nitrogen inlet valve of the circulating compressor 8, the nitrogen outlet valve and the tank inlet valve 2 are opened, then the gas tank 3 outlet valve and the tank inlet valve 6 into the tank body 1 are opened, and the nitrogen is uniformly dispersed into the urea solution in the gas tank through the gas distributor in the tank body 1. The floating bubbles rise from the bottom of the gas tank along the outside of the inner circulating pipe 17, thereby driving the urea solution outside to flow into the inside of the inner circulating pipe 17, and the upper urea solution sinks to the bottom in the inner circulating pipe 17 and flows into the outside of the inner circulating pipe 17. The gas cover 20 at the bottom of the gas tank prevents the bubbles from entering the inside of the inner circulating pipe 17 and hindering the liquid circulation in the urea solution gas tank. The nitrogen continues to be input to continuously circulate the lower urea solution to the top, and the urea solution at the top flows into the bottom, so that the urea solution in the urea solution gas tank is efficiently circulated.
[0036] Before the nitrogen is input, the circulating cooling water inlet valve 26 and the circulating cooling water outlet valve 25 of the gas condenser 5 are opened, the circulating cooling water is introduced into the condenser 5, the tank body 1 top exhaust valve is opened, the gas generated in the aeration process is introduced into the gas condenser 5 through the gas phase pipeline at the top of the tank body 1, the urea solution and water vapor in the gas are cooled into liquid through the condenser 5, and the liquid is introduced into the reflux tank 4 through the liquid outlet valve of the condenser 5. The dry gas is treated by the activated carbon adsorption box 19 to remove the ammonia in the tail gas, and finally the pure nitrogen is recycled by the circulating compressor 8, the gas tank 3 and the tank body 1. The reflux tank 4 is provided with a reflux flap liquid level gauge 16 for observing the liquid level in the reflux tank 4.
[0037] The reflux tank 4 top inlet root valve is opened, the liquid phase after the condenser 5 is introduced into the reflux tank 4, the gas phase in the reflux tank 4 is introduced into the activated carbon adsorption box 19 through the top gas phase pipeline and is used after treatment. The liquid level in the reflux tank 4 is observed by the reflux liquid level sensor 28, and the pressure in the reflux tank 4 is observed by the reflux pressure sensor 27. When the liquid level in the reflux tank 4 is relatively high, the reflux pump 7 inlet valve is opened, the reflux pump 7 is started, the pump outlet valve is opened, and the solution in the reflux tank 4 is sent into the urea solution gas tank. The reflux outlet check valve 23 is arranged between the reflux pump 7 and the tank body 1 to prevent the solution from flowing back into the reflux pump 7, and the reflux inlet filter 24 is arranged on the reflux inlet of the reflux pump 7 connected to the reflux tank 4.
[0038] In order to reduce the power consumption in the whole production process, the urea solution in the gas tank is uniformly mixed with the deionized water in a nitrogen bubbling circulation mode, the circulating mode of the machine pump and the stirrer is replaced, so that the urea solution is uniformly mixed quickly, the power loss of the uniform mixing step in the production process of the urea solution for vehicles is reduced, and the liquid mixing efficiency is improved.
[0039] The utility model discloses a new circulating mixed liquid mode is provided, utilize the nitrogen of cheap price, adopt the mode of gas bubble circulation, accelerate the uniform mixing rate of urea solution and deionized water, reduce the loss of power, thereby reduce the cost of whole production process, improve production efficiency, and convenient later maintenance.
[0040] The above several specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments.
[0041] The technical features of the above embodiments can be combined arbitrarily (as long as the combination of the technical features does not exist contradiction), in order to make the description simple, not all possible combinations of each technical feature in the above embodiments are described; these embodiments not explicitly written should also be considered as the scope of the present application.
[0042] The utility model has been described in the foregoing description and specific embodiments. It should be noted that without departing from the concept of the utility model, it is obvious that some modifications and improvements can be made to these specific embodiments, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.
Claims
1. A device for uniformly dispersing mixed liquid in a vehicle urea storage tank, characterized in that: include: A urea storage tank unit, comprising a tank body, the exterior of which is provided with a tank body temperature sensor, a tank body pressure gauge, a tank body pressure sensor, a tank body liquid level sensor, and a tank body gas outlet valve; The tail gas treatment unit includes a condenser, a reflux tank, a reflux pump and an activated carbon adsorption box. The breathing valve on the tank body is connected to the condenser. The two outlets of the condenser are respectively connected to the reflux tank and the activated carbon adsorption box, and one outlet of the reflux tank is also connected to the activated carbon adsorption box. The other outlet of the reflux tank is connected to the tank body through the reflux pump; The gas storage unit includes a circulating compressor, a gas storage tank and a gas source pipe. The circulating compressor is connected to the activated carbon adsorption box. The circulating compressor is also connected to the nitrogen source. The outlet end of the circulating compressor is connected to the inlet end of the gas storage tank, and the outlet end of the gas storage tank is connected to the bottom of the tank body.
2. The device for uniformly dispersing mixed liquid in a vehicle urea storage tank according to claim 1, characterized in that: A nitrogen distributor is provided at the bottom of the tank body to evenly disperse the input nitrogen.
3. The device for uniformly dispersing mixed liquid in a vehicle urea storage tank according to claim 1, characterized in that: An internal circulation pipe is provided in the tank body to separate the rising bubbles from the descending liquid.
4. The device for uniformly dispersing mixed liquid in a vehicle urea storage tank according to claim 3, characterized in that: An air hood is provided in the tank body below the inner circulation pipe and above the nitrogen distributor to prevent nitrogen from entering the inner circulation pipe.
5. The device for uniformly dispersing mixed liquid in a vehicle urea storage tank according to claim 3, characterized in that: The upper portion of the inner circulation pipe is provided with a weir to improve the liquid collection effect.