A multi-stage low-temperature filtration device for automotive urea production

Abstract

This utility model discloses a multi-stage low-temperature filtration device for automotive urea production, including a split-type tank assembly. The low-temperature cooling water circulation assembly is disposed on the split-type tank assembly, and the multi-stage filtration assembly is disposed inside the split-type tank assembly. Several flow guide ring plates are disposed inside the split-type tank assembly. This utility model features a split-type tank assembly and a multi-stage filtration assembly, employing a split-connected cover, split tank cylinder, and bottom tank, as well as detachable filter plates. It allows for disassembly and segmented cleaning of the cover, split tank cylinder, bottom tank, and filter plates, enabling comprehensive cleaning of the filtration device. It facilitates disassembly, cleaning, maintenance, and use. The conical flow guide ring plates cause the automotive urea material to gather and flow towards the center of the lower filter plate, reducing crystallization of the automotive urea material on the tank wall, reducing the frequency of filter cleaning, and ensuring the accuracy of automotive urea concentration.

Description

Technical Field

[0001] This utility model belongs to the field of automotive urea production technology, specifically relating to a multi-stage low-temperature filtration device for automotive urea production. Background Technology

[0002] Automotive urea is an essential product for heavy-duty diesel vehicles to meet the China IV emission standard. Automotive urea refers to a urea solution with a urea concentration of 32.5% and ultrapure water as the solvent. The raw materials are special raw materials for automotive urea and ultrapure water. During the processing, the automotive urea solution needs to be filtered through special filtration equipment.

[0003] Existing automotive urea filtration devices mostly adopt an integral tank structure with built-in multi-stage filtration components. However, crystallization is prone to occur on the tank wall during automotive urea filtration. The integral tank structure makes it inconvenient to clean automotive urea crystals, which will seriously affect the concentration of automotive urea after long-term use. To address this, we propose a multi-stage low-temperature filtration device for automotive urea production. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage low-temperature filtration device for automotive urea production, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage low-temperature filtration device for automotive urea production, comprising:

[0006] Split-type tank assembly;

[0007] A low-temperature cooling water circulation assembly is disposed on the split-type tank assembly;

[0008] A multi-stage filtration assembly is disposed within the split-type tank assembly;

[0009] A plurality of flow guide rings are provided, and the plurality of flow guide rings are disposed within the split tank assembly.

[0010] Preferably, the split-type tank assembly includes a cover, a split tank cylinder, and a bottom tank;

[0011] The split tank is provided in several parts, and the split tanks are connected by flanges, bolts and nuts. The cover is set on the uppermost split tank by flanges, bolts and nuts, and the bottom tank is set on the lowermost split tank by flanges and bolts.

[0012] Preferably, the cover is provided with a feed inlet, the bottom of the bottom tank is provided with a discharge pipe, and the discharge pipe is provided with a solenoid valve.

[0013] Preferably, the low-temperature cooling water circulation assembly includes a spiral conveying pipe, a cooling water inlet, a cooling water outlet, a unified inlet pipe, and a unified outlet pipe;

[0014] The split tank is provided with a jacket inside the tank wall, and each jacket is provided with a spiral conveying pipe. The upper and lower parts of each split tank are respectively provided with a cooling water inlet and a cooling water outlet connected to the spiral conveying pipe.

[0015] The cooling water inlets on the several separate tanks are connected to the output end of the low-temperature cooling water circulation conveyor through the unified water inlet pipe, and the cooling water outlets on the several separate tanks are connected to the input end of the low-temperature cooling water storage tank through the unified water outlet pipe. The output end of the low-temperature cooling water storage tank is connected to the input end of the low-temperature cooling water circulation conveyor.

[0016] Preferably, the multi-stage filtration assembly includes a limiting ring frame and a filter plate;

[0017] Each of the split tanks has a limiting ring frame in the middle of its interior, and the filter plate is positioned at the upper limit of the limiting ring frame.

[0018] Preferably, the filter plate is a stainless steel filter mesh plate.

[0019] Preferably, the pore size of the filter plates distributed from top to bottom within the split-type tank assembly gradually decreases.

[0020] Preferably, the flow guide ring plate is a conical flow guide structure with a larger top and a smaller bottom, and several flow guide ring plates are respectively disposed in the lower part of the inside of the cover and the split tank.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This utility model is equipped with a split tank assembly and a multi-stage filtration assembly. It adopts a split-connected cover, split tank cylinder and bottom tank, as well as a detachable filter plate. When it is necessary to clean the filtration device, the bolts and nuts on the flange can be removed to disassemble the cover, split tank cylinder and bottom tank separately, and the filter plate can be taken out from the limiting ring frame. The cover, split tank cylinder, bottom tank and filter plate can be cleaned in sections. It can clean the filtration device from all directions, which is convenient for disassembly, cleaning and maintenance, and easy to install.

[0023] 2. This utility model is provided with a conical guide ring plate in the lower part of the inside of the cover and the split tank. When the automotive urea material enters the cover through the feed port, the guide ring plate in the lower part of the cover causes the automotive urea material to gather and flow towards the center of the filter plate below, reducing the crystallization phenomenon of automotive urea material on the tank wall, thereby reducing the number of times the filter device needs to be cleaned and ensuring the accuracy of automotive urea concentration. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0026] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0027] Figure 4 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the split-type tank of this utility model;

[0029] Figure 6 This is a cross-sectional three-dimensional structural diagram of the split-type tank of this utility model.

[0030] In the diagram: 1. Split tank assembly; 101. Cover; 102. Split tank cylinder; 103. Bottom tank; 104. Inlet; 105. Discharge pipe; 106. Solenoid valve; 107. Jacket; 2. Low-temperature cooling water circulation assembly; 201. Spiral conveyor pipe; 202. Cooling water inlet; 203. Cooling water outlet; 204. Unified inlet pipe; 205. Unified outlet pipe; 3. Multi-stage filtration assembly; 301. Limiting ring frame; 302. Filter plate; 4. Guide ring plate. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-6 The multi-stage low-temperature filtration device for automotive urea production provided by this utility model includes:

[0033] The split tank assembly 1 includes a cover 101, split tank cylinders 102, and a bottom tank 103. Several split tank cylinders 102 are provided and connected by flanges, bolts, and nuts. The cover 101 is set on the uppermost split tank cylinder 102 by flanges, bolts, and nuts. The bottom tank 103 is set on the lowermost split tank cylinder 102 by flanges and bolts. The cover 101 is provided with a feed inlet 104. The bottom of the bottom tank 103 is provided with a discharge pipe 105 and a solenoid valve 106 is provided on the discharge pipe 105.

[0034] The low-temperature cooling water circulation component 2 is installed on the split tank assembly 1. The low-temperature cooling water circulation component 2 includes a spiral conveying pipe 201, a cooling water inlet 202, a cooling water outlet 203, a unified inlet pipe 204, and a unified outlet pipe 205. The split tank 102 has a jacket 107 inside its tank wall. Each jacket 107 has a spiral conveying pipe 201 installed inside it. The upper and lower parts of each split tank 102 are respectively provided with a cooling water inlet 202 and a cooling water outlet 203 connected to the spiral conveying pipe 201. The cooling water inlets 202 on several split tanks 102 are connected to the output end of the low-temperature cooling water circulation conveyor through the unified inlet pipe 204. The cooling water outlets 203 on several split tanks 102 are connected to the input end of the low-temperature cooling water storage tank through the unified outlet pipe 205. The output end of the low-temperature cooling water storage tank is connected to the input end of the low-temperature cooling water circulation conveyor.

[0035] A multi-stage filter assembly 3 is installed inside the split tank assembly 1. The multi-stage filter assembly 3 includes a limiting ring frame 301 and a filter plate 302. A limiting ring frame 301 is provided in the middle of the interior of each split tank 102. A filter plate 302 is provided at the upper limit of the limiting ring frame 301. The filter plate 302 is a stainless steel filter mesh plate. The aperture of the several filter plates 302 distributed from top to bottom in the split tank assembly 1 gradually decreases.

[0036] A number of flow guide ring plates 4 are provided, and the flow guide ring plates 4 are arranged inside the split tank assembly 1. The flow guide ring plates 4 are conical flow guide structures with a larger upper part and a smaller lower part, and the flow guide ring plates 4 are respectively arranged in the lower part of the inner part of the cover 101 and the split tank cylinder 102.

[0037] This utility model includes a split-type tank assembly 1 and a multi-stage filter assembly 3. It adopts a split-connected cover 101, split tank cylinder 102 and bottom tank 103, and a detachable filter plate 302. When the filter device needs to be cleaned, the bolts and nuts on the flange can be removed to disassemble the cover 101, split tank cylinder 102 and bottom tank 103 separately, and the filter plate 302 can be taken out from the limiting ring frame 301. The cover 101, split tank cylinder 102, bottom tank 103 and filter plate 302 can be cleaned in sections. It can clean the filter device from all angles, which is convenient for disassembly, cleaning, maintenance and use, and easy to install.

[0038] This utility model features a conical guide ring plate 4 located at the lower part of the interior of the cover 101 and the split tank 102. When automotive urea material enters the cover 101 through the feed inlet 104, the guide ring plate 4 at the lower part of the cover 101 causes the automotive urea material to gather and flow towards the center of the filter plate 302 below, reducing the crystallization phenomenon of automotive urea material on the tank wall, thereby reducing the number of times the filter device needs to be cleaned and ensuring the accuracy of automotive urea concentration.

[0039] In summary, the multi-stage low-temperature filtration device for automotive urea production provided in this embodiment is used as follows: When automotive urea material enters the cover 101 through the inlet 104, the guide ring plate 4 at the lower part of the cover 101 causes the automotive urea material to gather and flow towards the center of the filter plate 302 below, and then flows downwards for filtration. During this process, the low-temperature cooling water circulation conveyor transports the cooling water from the low-temperature cooling water storage tank to the spiral conveying pipe 201 in each separate tank 102 through the unified water inlet pipe 204 to cool the automotive urea and cool the filtered automotive urea solution to the required temperature. At the same time, it avoids the automotive urea solution temperature from being too high and affecting subsequent processes. Finally, the discharge pipe 105 is controlled by the solenoid valve 106 to discharge the urea.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage low temperature filter device for production of automotive urea, characterized by, include: Split-type tank assembly (1); Low-temperature cooling water circulation assembly (2), wherein the low-temperature cooling water circulation assembly (2) is disposed on the split tank assembly (1); A multi-stage filtration assembly (3) is disposed within the split-type tank assembly (1); A number of flow guide rings (4) are provided, and the number of flow guide rings (4) are arranged inside the split tank assembly (1).

2. A multi-stage low temperature filter device for production of automotive urea according to claim 1, characterized in that: The split tank assembly (1) includes a cover (101), a split tank cylinder (102), and a bottom tank (103). The split tank (102) is provided in several parts, and the split tank (102) is connected by flanges, bolts and nuts. The cover (101) is set on the uppermost split tank (102) by flanges, bolts and nuts, and the bottom tank (103) is set on the lowermost split tank (102) by flanges and bolts.

3. A multi-stage low temperature filter device for production of automotive urea according to claim 2, characterized in that: The cover (101) is provided with a feed inlet (104), the bottom of the bottom tank (103) is provided with a discharge pipe (105), and the discharge pipe (105) is provided with a solenoid valve (106).

4. The multi-stage low temperature filter device for producing urea for vehicles according to claim 2, characterized in that: The low-temperature cooling water circulation assembly (2) includes a spiral conveying pipe (201), a cooling water inlet (202), a cooling water outlet (203), a unified inlet pipe (204), and a unified outlet pipe (205). The split tank (102) is provided with a jacket (107) inside the tank wall. Each jacket (107) is provided with a spiral conveying pipe (201). The upper and lower parts of each split tank (102) are respectively provided with a cooling water inlet (202) and a cooling water outlet (203) connected to the spiral conveying pipe (201). The cooling water inlets (202) on several of the separate tanks (102) are connected to the output end of the low-temperature cooling water circulation conveyor through the unified water inlet pipe (204), and the cooling water outlets (203) on several of the separate tanks (102) are connected to the input end of the low-temperature cooling water storage tank through the unified water outlet pipe (205). The output end of the low-temperature cooling water storage tank is connected to the input end of the low-temperature cooling water circulation conveyor.

5. The multi-stage low temperature filter device for producing urea for vehicles according to claim 2, characterized in that: The multi-stage filtration assembly (3) includes a limiting ring frame (301) and a filter plate (302). Each of the split tanks (102) has a limiting ring frame (301) in the middle of its interior, and the filter plate (302) is provided at the upper limit of the limiting ring frame (301).

6. A multi-stage low temperature filter device for production of a vehicle urea according to claim 5, characterized in that: The filter plate (302) is a stainless steel filter mesh plate.

7. A multi-stage low temperature filter device for production of a vehicle urea according to claim 6, characterized in that: The apertures of the filter plates (302) distributed from top to bottom within the split tank assembly (1) gradually decrease.

8. A multi-stage low temperature filter device for production of automotive urea according to claim 2, characterized in that: The flow guide ring plate (4) is a conical flow guide structure with a larger upper part and a smaller lower part, and several of the flow guide ring plates (4) are respectively arranged in the lower part of the inner part of the cover (101) and the split tank (102).

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