Adblue production system

Abstract

The invention provides an adblue production system. The adblue production system comprises a raw water treatment unit, a mixing and homogenizing unit, a filtering unit, a decolorizing unit and a finished product water tank. The mixing and homogenizing unit comprises a reaction tank with a cavity, and the inner cavity is sequentially divided into a grinding area, a stirring area, a homogenizing area and a liquid mixing area from top to bottom. The reaction tank is provided with a driving part, a grinding disc and a crushing mechanism connected to the power output end of the driving part are arranged in the grinding area, and a stirring head connected to a power output shaft of the driving part is arranged in the stirring area; a homogenizing box is arranged in the homogenizing area, and a pressure pump is arranged on the outer side of the reaction tank and used for adjusting the pressure of the inner cavity. A liquid inlet of the homogenizing box is provided with a blocking plate, the blocking plate is connected to the power output end of the driving part, and the blocking plate rotates to block or open the liquid inlet. A plurality of liquid mixing assemblies arranged at intervals are arranged in the liquid mixing area, and a heating part, a flow guide part and a circulation part are arranged in each liquid mixing assembly. The equipment investment is reduced, and the quality of the produced adblue is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of urea production equipment, and in particular to a vehicle urea production system. Background Art

[0002] Automotive urea production equipment usually includes core components such as reactors, heaters, agitators and control systems. The reactor carries the mixing reaction of urea and water. The heater provides the necessary heat to help urea dissolve. The agitator ensures uniform mixing to avoid precipitation. The control system monitors the equipment status to ensure the safety and stability of the production process.

[0003] The preparation process of automotive urea mainly includes the steps of raw material preparation, dissolution and dilution, mixing and homogenization, filling and sealing, inspection and packaging. The specific process is to first add high-concentration urea and distilled water into the storage tank, then mix them evenly in the mixer, then the solution is pumped to the heater for heating, and then the impurities are filtered out through the filter to obtain a pure automotive urea solution.

[0004] Specifically, urea granules are put into the reactor, and after adding water, they are heated and stirred to fully dissolve the urea in the water. Precise control of temperature and stirring speed ensures the stability of the solution quality. In the raw material preparation stage, after the raw materials are blended with ultrapure water, if they are placed in a dry environment, the evaporation of water will cause crystal precipitation. In addition, since the ratio requirements of automotive urea solution are very strict, it is usually composed of 32.5% high-purity urea and 67.5% deionized water. If the ratio is inaccurate, it may cause the urea pump and nozzle to be blocked, or even damage the SCR system. In the prior art, it is necessary to add crushing or grinding equipment for pre-treatment and crushing, and then dissolve and dilute.

[0005] In addition, mixing and homogenization are important steps in the preparation of automotive urea. On the basis of ensuring that urea is fully dissolved, appropriate amounts of auxiliary materials such as preservatives, stabilizers and anti-crystallization agents are added, stirred, and then treated by high-pressure homogenization. Therefore, the automotive urea production system needs to set up special equipment one by one according to the steps, with many types of equipment and a large area of ​​​​occupancy.

[0006] In addition, in the multi-step production process, improper operation or leakage in any process may cause toxic gas to overflow, posing a threat to the respiratory system of personnel. More investment is required for equipment monitoring and maintenance, increasing the investment cost of the enterprise. Summary of the invention

[0007] In view of this, the present invention aims to provide a vehicle urea production system to reduce equipment investment, ensure the uniformity of vehicle urea, and improve the stability of the product.

[0008] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0009] A vehicle urea production system comprises a raw water treatment unit, a mixing and homogenizing unit, a filtering unit, a decolorizing unit, and a finished product water tank;

[0010] The mixing and homogenizing unit comprises a reaction tank with a cavity, wherein the inner cavity of the reaction tank is divided into a grinding area, a stirring area, a homogenizing area and a liquid mixing area from top to bottom;

[0011] The upper part of the reaction tank is provided with a driving part, the grinding area is provided with a grinding disc and a crushing mechanism connected to the power output end of the driving part, the stirring area is provided with a stirring head connected to the power output shaft of the driving part; the homogenizing area is provided with a homogenizing box with a liquid storage cavity, and the outside of the reaction tank is provided with a pressure pump, and the pressure pump is used to adjust the pressure of the inner cavity;

[0012] A blocking plate is provided on the liquid inlet of the homogenizing box, and the blocking plate is connected to the power output end of the driving part, and the rotation of the blocking plate blocks or opens the liquid inlet;

[0013] The liquid mixing area is provided with a plurality of liquid mixing components arranged at intervals. The liquid mixing components are provided with a heating part, a flow guide part, and a circulation part. The flow guide part is communicated with the inner cavity of the homogenizing tank. The urea mixed liquid enters the flow guide part and flows into the liquid mixing area through the circulation part.

[0014] Furthermore, an aeration tank is provided outside the reaction tank, and the outlet of the aeration tank is communicated with the mixed liquid area.

[0015] Furthermore, the grinding disc is provided with an annular grinding chamber with an upper opening, and the pulverizing mechanism comprises a connecting shaft connected to the power output end of the driving part, a pulverizing roller pivotally connected to the outer side of the connecting shaft, and a material shaking mechanism detachably connected to the connecting shaft;

[0016] The grinding disc comprises a bottom plate, and a through hole is provided in the middle of the bottom plate;

[0017] The bottom plate edge is provided with an annular outer plate, the through hole is provided with an annular inner plate, and the inner plate adopts a filter screen;

[0018] The lower end of the pulverizing roller abuts against the bottom wall of the grinding disc and rotates relative to the connecting shaft due to its own gravity.

[0019] Furthermore, a urea feed pipe and a raw water feed pipe are provided on the upper part of the reaction tank;

[0020] The raw water feed pipe and the urea feed pipe are both connected to the annular grinding chamber;

[0021] A liquid outlet is provided at the bottom of the reaction tank, and the liquid outlet is communicated with the filtering unit.

[0022] Furthermore, the material shaking mechanism includes a support frame connected to the connecting shaft, a material shaking plate screwed to the support frame, and the material shaking plate abuts against the bottom wall of the grinding disc;

[0023] A first clamping plate is disposed at one end of the support frame away from the shaking plate, and the first clamping plate and the second clamping plate are buckled together at the outer side of the connecting shaft.

[0024] Furthermore, a plurality of rectangular teeth arranged at intervals are provided at the bottom of the material shaking plate, a material shaking space is provided between two of the rectangular teeth, and the rectangular teeth abut against the grinding disc.

[0025] Furthermore, the liquid mixing assembly includes a first support plate, a second support plate spaced apart from the first support plate, and a plurality of spacers disposed on the first support plate and the second support plate;

[0026] The heating part is arranged in the spacer;

[0027] Two adjacent partitions are provided to form a flow groove, the first support plate is provided with a first water-permeable hole connected to the flow groove, the second support plate is provided with a second water-permeable hole connected to the flow groove, and the second water-permeable hole forms the flow portion;

[0028] The diameter of the first water permeable hole is larger than that of the second water permeable hole.

[0029] Furthermore, the first support plate, the spacer bar and both ends of the second support plate are provided with sealing plates for sealing the flow slot;

[0030] The sealing plates at both ends are provided with fixing plates, the fixing plate at the upper end is connected to the homogenizing box, and the fixing plate at the lower end is connected to the bottom wall of the reaction tank.

[0031] Furthermore, the filtering unit includes a coarse filtering unit and a fine filtering unit, and the decolorizing unit is arranged between the coarse filtering unit and the fine filtering unit;

[0032] The fine filtration unit outlet is provided with a first outlet pipeline and a second outlet pipeline, and the first outlet pipeline is connected to the finished product water tank;

[0033] The second outlet pipeline is in communication with the raw water feed pipe.

[0034] Furthermore, the blocking plate is elliptical.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] The automotive urea production system of the present invention drives the crushing mechanism to rotate on the grinding disc through the driving part to crush the urea crystals. After a period of crushing, the raw water is transported to the grinding disc, carrying the ground urea into the homogenizing box, and the pressure is applied to the homogenizing box through the pressure pump to reach the pressure required for homogenization. After stirring and dissolving the urea particles, the mass fraction of urea is increased to meet the filling requirements. After homogenization, the mixed liquid is squeezed into the mixed liquid component by the pressure of the pressure pump. The mixed liquid is heated by the heating part, flows through the guide part and the circulation part into the mixed liquid area. Since the pressure in the mixed liquid area is relatively low, and the pressure of the mixed liquid flowing out of the circulation part is relatively high, the mixed liquid that enters later is mixed and impacted again with the mixed liquid that enters earlier, further improving the uniformity of the urea mixed liquid and improving the stability of the product.

[0037] In addition, the mixing and homogenizing unit of this embodiment concentrates the process steps of dissolving and diluting, mixing and homogenizing in the prior art into the reaction tank, which not only reduces the dedicated equipment and the footprint of the automotive urea production system, but also achieves the uniformity of the mixing effect of urea and water in the urea mixture by sequentially arranging crushing, stirring, homogenizing and re-mixing, thereby ensuring the yield and purity of the product.

[0038] In addition, an aeration tank is connected to the mixed liquid area to increase the oxygen content in the solution by introducing air or oxygen into the urea mixed liquid, thereby promoting the dissolution and reaction of urea and ensuring the quality and stability of the urea solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 This is a flow chart of a vehicle urea production system according to an embodiment of the present invention;

[0041] Figure 2 It is a cross-sectional schematic diagram of the mixing and homogenizing unit according to an embodiment of the present invention;

[0042] Figure 3 It is a cross-sectional connection diagram of the grinding disc and the pulverizing mechanism according to an embodiment of the present invention;

[0043] Figure 4 It is a top view schematic diagram of the connection between the grinding disc and the crushing mechanism according to an embodiment of the present invention;

[0044] Figure 5 It is a front view schematic diagram of the crushing roller, the support frame and the shaking plate according to the embodiment of the present invention;

[0045] Figure 6This is a schematic diagram of the connection between the first support plate, the spacer bar, and the heating part according to an embodiment of the present invention;

[0046] Figure 7 It is a cross-sectional schematic diagram of the connection structure of the first support plate, the second support plate, and the spacer bar according to an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 1. Raw water treatment unit; 2. Mixing and homogenizing unit; 3. Filtration unit; 4. Decolorization unit; 5. Finished water tank; 6. Flow regulating valve; 7. Second extraction pump; 8. Third extraction pump;

[0049] 101. Raw water tank; 102. First extraction pump; 103. Sand filter assembly; 104. Carbon filter assembly; 105. Fine filter assembly; 106. High-pressure pump; 107. Primary reverse osmosis; 108. Secondary reverse osmosis; 109. Cleaning system;

[0050] 201, reaction tank; 202, grinding area; 203, stirring area; 204, homogenizing area; 205, liquid mixing area; 206, driving unit; 207, grinding disc; 208, crushing mechanism; 209, pressure pump; 210, aeration tank; 211, urea feed pipe; 212, raw water feed pipe; 213, liquid outlet;

[0051] 301, coarse filter unit; 302, fine filter unit; 303, first outlet pipeline; 304, second outlet pipeline;

[0052] 2031, stirring head;

[0053] 2041, homogenizing box; 2042, blocking plate;

[0054] 2051, heating part; 2052, flow guide part; 2053, circulation part; 2054, first support plate; 2055, second support plate; 2056, spacer; 2057, first water permeable hole; 2058, fixing plate; 2059, sealing plate;

[0055] 2071, annular grinding chamber; 2072, bottom plate; 2073, through hole; 2074, outer plate; 2075, inner plate;

[0056] 2081, connecting shaft; 2082, crushing roller; 2083, supporting frame; 2084, shaking plate; 2085, first connecting plate; 2086, second connecting plate; 2087, screw; 2088, cylinder;

[0057] 20831. First clamping plate; 20832. Second clamping plate; 20841. Rectangular teeth. DETAILED DESCRIPTION

[0058] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0059] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connected", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0061] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0062] This embodiment relates to a vehicle urea production system, such as Figure 1 and Figure 2 As shown, the production system includes a raw water treatment unit 1, a mixing and homogenizing unit 2, a filtering unit 3, a decolorizing unit 4, and a finished water tank 5. The mixing and homogenizing unit 2 includes a reaction tank 201 with a cavity, and the inner cavity of the reaction tank 201 is divided into a grinding area 202, a stirring area 203, a homogenizing area 204, and a liquid mixing area 205 from top to bottom. A driving part 206 is provided on the upper part of the reaction tank 201, a grinding disc 207 and a crushing mechanism 208 connected to the power output end of the driving part 206 are provided in the grinding area 202, and a stirring head 2031 connected to the power output shaft of the driving part 206 is provided in the stirring area 203; a homogenizing box 2041 with a liquid storage cavity is provided in the homogenizing area 204, and a pressure pump 209 is provided outside the reaction tank 201, and the pressure pump 209 is used to adjust the pressure of the inner cavity.

[0063] The liquid inlet of the homogenizing tank 2041 is provided with a plugging plate 2042, which is connected to the power output end of the driving unit 206. The plugging plate 2042 is rotated to block or open the liquid inlet. The liquid mixing area 205 is provided with a plurality of liquid mixing components arranged at intervals. The liquid mixing components are provided with a heating part 2051, a flow guide part 2052, and a circulation part 2053. The flow guide part 2052 is connected to the inner cavity of the homogenizing tank 2041. The urea mixed liquid enters the flow guide part 2052 and flows into the liquid mixing area 205 through the circulation part 2053.

[0064] The automotive urea production system of this embodiment drives the crushing mechanism 208 to rotate on the grinding disc 207 through the driving unit 206 to crush the crystal urea. After a period of crushing, the raw water is transported to the grinding disc 207, carrying the ground urea into the homogenizing box 2041, and the pressure pump 209 applies air pressure to the homogenizing box 2041 to reach the pressure required for homogenization. After stirring and dissolving the urea particles, the mass fraction of urea is increased to meet the filling requirements. After homogenization, the pressure of the pressure pump 209 squeezes the mixed liquid into the mixed liquid component, and the mixed liquid is heated by the heating unit 2051, flows through the guide unit 2052 and the circulation unit 2053 into the mixed liquid area 205. Since the pressure in the mixed liquid area 205 is relatively low, and the pressure of the mixed liquid flowing out through the circulation unit 2053 is relatively high, the mixed liquid entering later and the mixed liquid entering earlier are mixed and impacted again, further improving the uniformity of the urea mixed liquid and improving the stability of the product.

[0065] In addition, the mixing and homogenizing unit 2 of the present embodiment concentrates the process steps of dissolving and diluting, mixing and homogenizing in the prior art into the reaction tank 201, which not only reduces the dedicated equipment and the footprint of the automotive urea production system, but also achieves the uniformity of the mixing effect of urea and water in the urea mixture by sequentially arranging crushing, stirring, homogenizing and re-mixing, thereby ensuring the yield and purity of the product.

[0066] Based on the above overall introduction, an exemplary structure of the automotive urea production system of this embodiment is as follows: Figure 1 to Figure 2 As shown, the raw water treatment unit 1 includes a raw water tank 101, a first extraction pump 102, a sand filter assembly 103, a carbon filter assembly 104, a fine filter assembly 105, a high-pressure pump 106, a primary reverse osmosis 107, and a secondary reverse osmosis 108, which are arranged in sequence. The above equipments are all referred to the existing technical structure and are not repeated here. Among them, a scale inhibitor is added between the carbon filter 104 and the fine filter, and a cleaning system 109 is provided in the primary reverse osmosis 107 process. The cleaning system 109 is used to reversely flush the primary reverse osmosis 107 to ensure the recycling of the primary reverse osmosis 107.

[0067] In addition, if Figure 1As shown, the filtration unit 3 includes a coarse filtration unit 301 and a fine filtration unit 302, and the decolorization unit 4 is arranged between the coarse filtration unit 301 and the fine filtration unit 302. The outlet of the fine filtration unit 302 is provided with a first outlet pipeline 303 and a second outlet pipeline 304, the first outlet pipeline 303 is connected to the finished water tank 5, and the second outlet pipeline 304 is connected to the raw water feed pipe 212. Among them, the raw water tank 101, the sand filter 103, the carbon filter 104, the primary reverse osmosis 107 and the primary coarse filtration unit 301 are all provided with drainage pipes to discharge the filtered concentrated water for unified treatment.

[0068] As Figure 1 As shown, the filtration accuracy of the coarse filter unit 301 is between 10 and 30 microns, and it is mainly used to intercept larger particles and filter large particles before the fine filter unit 302 to prevent large urea crystals from clogging the filter element of the fine filter unit 302. The filtration accuracy of the fine filter unit 302 is between 2 and 10 microns, which can remove small particles and ensure the purity and quality of the automotive urea solution. Among them, a second extraction pump 7 is provided between the coarse filter unit 301 and the liquid outlet 213 of the reaction tank 201, and a third extraction pump 8 is provided between the fine filter unit 302 and the finished product water tank 5.

[0069] Still Figure 1 As shown, by setting a second outlet pipeline 304, the filtered clean water is mixed with the raw water and then input into the reaction tank 201, and a flow regulating valve 6 is set on the second outlet pipeline 304 and the raw water inlet pipeline to control the flow of the raw water and the mixed water, and a metering instrument is set on the urea delivery pipeline to control the flow of the high-purity urea solution. The automotive urea in this embodiment is mainly composed of 35% high-purity urea and 65% ultrapure water. Antifreeze (such as methanol) and other additives can also be added as needed. On the basis of ensuring that the urea is fully dissolved, necessary auxiliary materials are added and uniform mixing is achieved through stirring.

[0070] like Figure 1 to Figure 2 As shown, an aeration tank 210 is further provided outside the reaction tank 201, and the outlet of the aeration tank 210 is connected to the mixed liquid area 205. The aeration tank 210 is connected to the mixed liquid area 205, and air or oxygen is introduced into the urea mixed liquid to increase the oxygen content in the solution, thereby promoting the dissolution and reaction of urea and ensuring the quality and stability of the urea solution.

[0071] like Figures 2 to 5As shown, the grinding disc 207 is provided with an annular grinding chamber 2071 with an upper end opening, the pulverizing mechanism 208 includes a connecting shaft 2081 connected to the power output end of the driving part 206, a pulverizing roller 2082 pivotally connected to the outside of the connecting shaft 2081, and a material shaking mechanism detachably connected to the connecting shaft 2081, the grinding disc 207 includes a bottom plate 2072, a through hole 2073 is provided in the middle of the bottom plate 2072, an annular outer plate 2074 is provided at the edge of the bottom plate 2072, an annular inner plate 2075 is provided at the through hole 2073, and a filter screen is used for the inner plate 2075, the lower end of the pulverizing roller 2082 abuts against the bottom wall of the grinding disc 207, and rotates relative to the connecting shaft 2081 due to its own gravity.

[0072] In this embodiment, the ratio of raw water and high-purity urea is input in the above ratio to control the ratio of the automotive urea solution. Since urea crystals are a kind of crystalline body with high brittleness, the crushing mechanism 208 is driven to rotate by the driving part 206 to squeeze the urea crystals inputted on the grinding disc 207. Due to the inner enclosure 2075 provided with the filter screen, large-particle crystals cannot flow into the homogenizing box 2041, so as to ensure that the urea crystals can be sieved into the homogenizing box 2041 when they meet the requirements. In this embodiment, the flow rate of raw water inflow is less than the flow rate of high-purity urea solution, and some crystals are blocked by the inner enclosure 2075 and placed in the grinding disc 207. Raw water is gradually added to dilute the crushed urea crystals.

[0073] like Figure 2 As shown, a urea feed pipe 211 and a raw water feed pipe 212 are provided at the top of the reaction tank 201, and both the raw water feed pipe 212 and the urea feed pipe 211 are connected to the annular grinding chamber 2071. A liquid outlet 213 is provided at the bottom of the reaction tank 201, and the liquid outlet 213 is connected to the filter unit 3.

[0074] Furthermore, if Figures 2 to 5 As shown, the shaking mechanism includes a support frame 2083 connected to the connecting shaft 2081, a shaking plate 2084 screwed on the support frame 2083, and the shaking plate 2084 abuts against the bottom wall of the grinding disc 207. A first clamping plate 20831 is provided at one end of the support frame 2083 away from the shaking plate 2084, and the first clamping plate 20831 and the second clamping plate 20832 are buckled on the outer side of the connecting shaft 2081.

[0075] like Figures 3 to 5 As shown, the bottom of the shaking plate 2084 is provided with a plurality of rectangular teeth 20841 arranged at intervals, a shaking space is provided between two rectangular teeth 20841, and the rectangular teeth 20841 abut against the grinding disc 207. The shaking plate 2084 is a long curved plate to improve its structural strength.

[0076] Still Figure 3As shown in the figure, the support frame 2083 includes a first connecting plate 2085 connected to the first clamping plate 20831, a second connecting plate 2086 connected to the second clamping plate 20832, and a screw 2087 connected between the first connecting plate 2085 and the second connecting plate 2086. A cylinder 2088 is provided at one end of the shaking plate 2084, and the cylinder 2088 is sleeved on the screw 2087. An internal thread groove matching the thread of the screw 2087 is provided in the cylinder 2088. The screw 2087 has two connected and reverse external thread grooves, and a ball is provided between the internal thread groove and the external thread groove. When the shaking plate 2084 abuts and rubs against the grinding disc 207, the shaking plate 2084 moves back and forth along the axial direction of the screw 2087.

[0077] In this arrangement, the shaking plate 2084 is arranged behind the crushing roller 2082. During the urea crystal crushing process, the shaking plate 2084 scrapes up the granular powder adhered to the grinding disc 207 to facilitate the mixing of the crystals and the raw water, thereby improving the liquid mixing effect.

[0078] Preferably, if Figure 2 , Figure 6 , Figure 7 As shown, the liquid mixing assembly includes a first support plate 2054, a second support plate 2055 spaced apart from the first support plate 2054, and a plurality of partition bars 2056 disposed on the first support plate 2054 and the second support plate 2055, and the heating part 2051 is disposed in the partition bars 2056. A forming flow slot is formed between two adjacent partition bars 2056, the first support plate 2054 is provided with a first water permeable hole 2057 communicating with the flow slot, the second support plate 2055 is provided with a second water permeable hole communicating with the flow slot, and the diameter of the first water permeable hole 2057 is larger than the second water permeable hole. The heating part 2051 of this embodiment adopts an electric heating rod, and the electric heating rod is electrically connected to an external power supply.

[0079] Furthermore, if Figure 6 and Figure 7 As shown, sealing plates 2059 for blocking the flow slot are provided at both ends of the first support plate 2054, the partition bar 2056 and the second support plate 2055. Fixed plates 2058 are provided on the sealing plates 2059 at both ends, the upper fixed plate 2058 is connected to the homogenizing box 2041, and the lower fixed plate 2058 is connected to the bottom wall of the reaction tank 201.

[0080] Preferably, the blocking plate 2042 of this embodiment is elliptical, such as Figure 2 As shown, the plugging plate 2042 is connected to the power output end of the driving part 206. During the rotation, the plugging plate 2042 rotates to block or open the liquid inlet, so that the mixed liquid in the stirring area 203 gradually flows into the mixed liquid area 205 below after being fully stirred, thereby improving the uniformity of the urea mixed liquid.

[0081] The automotive urea production system of this embodiment integrates crushing, stirring and homogenizing in the reaction tank 201, and mixes again in the mixed liquid area 205. The mixed liquid is heated and controlled to flow through the first support plate 2054 and the second support plate 2055, and is ejected from the second support plate 2055. The mixing uniformity of urea is further improved, the product quality is guaranteed, and the cost increase caused by the investment of multiple equipment and the defects of pollution gas leakage caused by improper operation are avoided.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle urea production system, characterized in that: It comprises a raw water treatment unit (1), a mixing and homogenizing unit (2), a filtering unit (3), a decolorizing unit (4), and a finished water tank (5); The mixing and homogenizing unit (2) comprises a reaction tank (201) having a cavity, wherein the inner cavity of the reaction tank (201) is divided into a grinding area (202), a stirring area (203), a homogenizing area (204) and a liquid mixing area (205) from top to bottom; The reaction tank (201) is provided with a driving unit (206) at the top, the grinding area (202) is provided with a grinding disc (207) and a crushing mechanism (208) connected to the power output end of the driving unit (206), the stirring area (203) is provided with a stirring head (2031) connected to the power output shaft of the driving unit (206); the homogenizing area (204) is provided with a homogenizing box (2041) having a liquid storage cavity, and the outside of the reaction tank (201) is provided with a pressure pump (209), and the pressure pump (209) is used to adjust the pressure of the inner cavity; A blocking plate (2042) is provided on the liquid inlet of the homogenizing box (2041), and the blocking plate (2042) is connected to the power output end of the driving part (206), and the blocking plate (2042) rotates to block or open the liquid inlet; The liquid mixing area (205) is provided with a plurality of liquid mixing components arranged at intervals. The liquid mixing components are provided with a heating part (2051), a flow guide part (2052), and a circulation part (2053). The flow guide part (2052) is communicated with the inner cavity of the homogenizing box (2041). The urea mixed liquid enters the flow guide part (2052) and flows into the liquid mixing area (205) through the circulation part (2053).

2. The vehicle urea production system according to claim 1, characterized in that: An aeration tank (210) is also provided outside the reaction tank (201), and the outlet of the aeration tank (210) is connected to the mixed liquid area (205).

3. The vehicle urea production system according to claim 2, characterized in that: The grinding disc (207) is provided with an annular grinding chamber (2071) with an upper end opening, and the pulverizing mechanism (208) comprises a connecting shaft (2081) connected to the power output end of the driving part (206), a pulverizing roller (2082) pivotally connected to the outside of the connecting shaft (2081), and a material shaking mechanism detachably connected to the connecting shaft (2081); The grinding disc (207) comprises a bottom plate (2072), and a through hole (2073) is provided in the middle of the bottom plate (2072); An annular outer plate (2074) is provided at the edge of the bottom plate (2072), an annular inner plate (2075) is provided at the through hole (2073), and a filter screen is used in the inner plate (2075); The lower end of the crushing roller (2082) abuts against the bottom wall of the grinding disc (207) and rotates relative to the connecting shaft (2081) due to its own gravity.

4. The vehicle urea production system according to claim 3, characterized in that: The upper part of the reaction tank (201) is provided with a urea feed pipe (211) and a raw water feed pipe (212); The raw water feed pipe (212) and the urea feed pipe (211) are both connected to the annular grinding chamber (2071); The bottom of the reaction tank (201) is provided with a liquid outlet (213), and the liquid outlet (213) is in communication with the filtering unit (3).

5. The vehicle urea production system according to claim 3, characterized in that: The material shaking mechanism comprises a support frame (2083) connected to the connecting shaft (2081), a material shaking plate (2084) screwed on the support frame (2083), and the material shaking plate (2084) abuts against the bottom wall of the grinding disc (207); A first clamping plate (20831) is provided at one end of the support frame (2083) away from the shaking plate (2084), and the first clamping plate (20831) and the second clamping plate (20832) are buckled on the outside of the connecting shaft (2081).

6. The vehicle urea production system according to claim 5, characterized in that: The bottom of the shaking plate (2084) is provided with a plurality of rectangular teeth (20841) arranged at intervals, a shaking space is provided between two of the rectangular teeth (20841), and the rectangular teeth (20841) are in contact with the grinding disc (207).

7. The vehicle urea production system according to claim 6, characterized in that: The liquid mixing assembly comprises a first support plate (2054), a second support plate (2055) spaced apart from the first support plate (2054), and a plurality of spacers (2056) disposed on the first support plate (2054) and the second support plate (2055); The heating portion (2051) is disposed in the partition bar (2056); Two adjacent partition bars (2056) form a molded flow groove, the first support plate (2054) is provided with a first water permeable hole (2057) connected to the flow groove, the second support plate (2055) is provided with a second water permeable hole connected to the flow groove, and the second water permeable hole constitutes the flow portion (2053); The diameter of the first water-permeable hole (2057) is larger than that of the second water-permeable hole.

8. The vehicle urea production system according to claim 7, characterized in that: Sealing plates (2059) for sealing the flow slot are provided at both ends of the first supporting plate (2054), the partition bar (2056) and the second supporting plate (2055); The sealing plates (2059) at both ends are provided with fixing plates (2058), the fixing plate (2058) at the upper end is connected to the homogenizing box (2041), and the fixing plate (2058) at the lower end is connected to the bottom wall of the reaction tank (201).

9. The vehicle urea production system according to claim 1, characterized in that: The filtering unit (3) comprises a coarse filtering unit (301) and a fine filtering unit (302), and the decolorizing unit (4) is arranged between the coarse filtering unit (301) and the fine filtering unit (302); The outlet of the fine filtration unit (302) is provided with a first outlet pipeline (303) and a second outlet pipeline (304), and the first outlet pipeline (303) is connected to the finished water tank (5); The second outlet pipeline (304) is in communication with the raw water feed pipe (212).

10. The vehicle urea production system according to claim 1, characterized in that: The blocking plate (2042) is elliptical.

Images