Automatic pollution discharge and recovery device for urea solution

Abstract

The utility model relates to urea production technical field especially a kind of urea solution automatic pollution discharge recovery device, including sedimentation tank, the lower portion of the sedimentation tank is connected with filter tank, the inner wall of the sedimentation tank is fixedly connected with baffle, the lower portion of the sedimentation tank is fixedly connected with two drain pipes, the upper end of the drain pipe is fixedly connected with corrugated folding pipe, the upper end of the sedimentation tank is fixedly connected with the lifting mechanism for the expansion of corrugated folding pipe, the inner wall of the filter tank is installed with four different aperture filter plate, the rear side of the filter tank is installed with pollution discharge pipe, valve is installed on pollution discharge pipe, the inner wall of the filter tank is fixedly connected with deflector.The urea solution automatic pollution discharge recovery device of the utility model realizes the integration of impurity separation, automatic cleaning, resource recovery, improves the environmental protection and economy in urea production process, reduces artificial maintenance cost, and the structure is simple, easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of urea production technology, and in particular to an automatic urea solution wastewater discharge and recovery device. Background Technology

[0002] Urea solution, as a key chemical raw material that combines economy and functionality, plays an indispensable role in modern industry and people's livelihood. Its applications cover a wide range of important fields: In the automotive environmental protection field, as a core reducing agent in selective catalytic reduction (SCR) systems, urea solution produces ammonia through pyrolysis, which reacts with nitrogen oxides (NOx) in exhaust gas through a redox reaction, converting pollutants into harmless nitrogen and water, making it an "environmental guardian" for diesel vehicles to meet China VI and above emission standards; in agricultural production, as a highly efficient nitrogen source fertilizer, it can be converted into ammonium nitrogen that plants can absorb through soil microorganisms, effectively increasing crop yields, especially suitable for topdressing of grain crops such as rice and wheat; in the pharmaceutical and chemical fields, its high purity makes it an important raw material for synthesizing intermediates for antibiotics, vitamins, and other drugs, providing a fundamental guarantee for the refined production of the pharmaceutical industry.

[0003] During the production of urea solution, insoluble impurities (such as particulate matter and crystalline salts) and trace pollutants are easily generated due to factors such as differences in raw material purity, temperature changes, or chemical reactions. Direct discharge of these pollutants will not only waste resources but may also cause problems such as pipe blockage, equipment corrosion, and even environmental pollution. Utility Model Content

[0004] To address the shortcomings of existing technologies and solve the aforementioned technical problems, this utility model provides an automatic urea solution wastewater discharge and recovery device, which can recover and reuse the waste liquid generated during urea production. The specific technical solution is as follows:

[0005] An automatic urea solution wastewater discharge and recovery device includes a sedimentation tank, a filter tank connected below the sedimentation tank, a baffle plate fixedly connected to the inner wall of the sedimentation tank, two drain pipes fixedly connected to the lower part of the sedimentation tank, a corrugated folded pipe fixedly connected to the upper end of the drain pipes, a lifting mechanism for the extension and retraction of the corrugated folded pipe fixedly connected to the upper end of the sedimentation tank, four filter plates with different apertures installed on the inner wall of the filter tank, a wastewater discharge pipe installed on the rear side of the filter tank, a valve installed on the wastewater discharge pipe, and a guide plate fixedly connected to the inner wall of the filter tank.

[0006] Furthermore, the lifting mechanism includes a U-shaped plate fixedly connected to the upper surface of the sedimentation tank, an electric telescopic rod fixedly connected to the U-shaped plate, a connecting seat fixedly connected to the free end of the electric telescopic rod, the connecting seat fixedly connected to the inner wall of the corrugated folded tube, and a number of limiting posts for restricting the folding direction of the corrugated folded tube fixedly connected to the bottom wall of the sedimentation tank.

[0007] Furthermore, the inner walls on both sides of the filter pool are fixedly connected with slide rails arranged at equal intervals. The filter plate is detachably connected to the slide rails, and the slide rails are threaded with tightening bolts for fixing the filter plate.

[0008] Furthermore, a drive mechanism is fixedly connected to the lower surface of the sedimentation tank, and a cleaning component is detachably connected to the drive mechanism. The drive mechanism includes a strip-shaped slide fixedly connected to the lower surface of the sedimentation tank, a driver is fixedly connected to one side of the strip-shaped slide, a lead screw is fixedly connected to the output end of the driver, a slider is slidably connected to the strip-shaped slide, and an L-shaped plate is fixedly connected to the lower surface of the slider.

[0009] Furthermore, the driver is a reversible motor.

[0010] Furthermore, the cleaning assembly includes four inclined plates mounted on an L-shaped plate, with brushes fixedly connected to the surface of the inclined plates.

[0011] Furthermore, a water pump is placed inside the filter tank, and a water suction pipe is connected to the water pump.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This automatic urea solution wastewater recovery device achieves automation and high efficiency in urea solution wastewater recovery through the coordinated design of a sedimentation tank and a filtration tank. The sedimentation tank is divided into two sedimentation zones by a baffle plate, and a liftable corrugated pleated pipe allows for precise extraction of the supernatant, preventing sediment from entering subsequent stages. The filtration tank features four stages of filter plates with different pore sizes for progressively deeper filtration, effectively removing fine impurities. The filter plates are also detachable via sliding rails for easy cleaning and replacement. A drive mechanism automatically cleans the filter plate surface with a brush assembly to prevent clogging and maintain filtration efficiency. Simultaneously, the device uses a water pump to recover the filtered clean solution, reducing resource waste. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0015] Figure 2 This is a cross-sectional view of the entire utility model;

[0016] Figure 3 for Figure 1 Enlarged view of point A above.

[0017] Reference numerals in the attached diagram: 1. Sedimentation tank; 2. Filtration tank; 3. Baffle plate; 4. Drainage pipe; 5. Corrugated pleated pipe; 6. Filter plate; 7. U-shaped plate; 8. Electric telescopic rod; 9. Connecting seat; 10. Limiting column; 11. Strip slide; 12. Driver; 13. Lead screw; 14. Slider; 15. L-shaped plate; 16. Inclined plate; 17. Brush; 18. Slide rail; 19. Water pump; 20. Water suction pipe. Detailed Implementation

[0018] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0019] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0020] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0022] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0023] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0025] Please see Figures 1 to 3 An automatic urea solution wastewater discharge and recovery device includes a sedimentation tank 1, a filter tank 2 connected to the lower part of the sedimentation tank 1, a partition 3 fixedly connected to the inner wall of the sedimentation tank 1, two drain pipes 4 fixedly connected to the lower part of the sedimentation tank 1, a corrugated folded pipe 5 fixedly connected to the upper end of the drain pipes 4, a lifting mechanism for the extension and retraction of the corrugated folded pipe 5 fixedly connected to the upper end of the sedimentation tank 1, four filter plates 6 with different apertures installed on the inner wall of the filter tank 2, a wastewater discharge pipe installed on the rear side of the filter tank 2, a valve installed on the wastewater discharge pipe, and a guide plate fixedly connected to the inner wall of the filter tank 2.

[0026] In use, the automatic urea solution wastewater discharge and recovery device of this utility model divides the sedimentation tank 1 into two sedimentation areas by the partition 3. The sedimentation tank 1 is used to initially receive the waste liquid generated during the urea production process, where impurities and crystals are separated by sedimentation. By controlling the lifting mechanism, the corrugated folded pipe 5 enters the supernatant inside the sedimentation tank 1, thereby discharging the supernatant into the filter tank 2 for filtration. The filter plates 6 are arranged in order of increasing pore size (e.g., 10μm→5μm→2μm→1μm) to achieve step-by-step filtration. The filtered liquid is left at the bottom of the filter tank 2 for recycling.

[0027] like Figure 2 and Figure 3As shown, the lifting mechanism includes a U-shaped plate 7 fixedly connected to the upper surface of the sedimentation tank 1, an electric telescopic rod 8 fixedly connected to the U-shaped plate 7, a connecting seat 9 fixedly connected to the free end of the electric telescopic rod 8, the connecting seat 9 fixedly connected to the inner wall of the corrugated folded tube 5, and a number of limiting posts 10 for limiting the folding direction of the corrugated folded tube 5 fixedly connected to the bottom wall of the sedimentation tank 1.

[0028] Specifically, the electric telescopic rod 8 drives the connecting seat 9 to rise and fall, causing the corrugated folded tube 5 to extend and retract (the limiting post 10 restricts the folding direction), allowing the drain pipe 4 to enter the interior of the supernatant in the sedimentation tank 1, gradually allowing the supernatant to flow into the corrugated folded tube 5, and then discharge it from the drain pipe 4 into the filter tank 2 for filtration. When drainage stops, the electric telescopic rod 8 retracts, and the corrugated folded tube 5 folds and shortens, moving away from the surface of the supernatant.

[0029] like Figure 1 As shown, slide rails 18 arranged at equal intervals are fixedly connected to both inner walls of the filter pool 2. The filter plate 6 is detachably connected to the slide rails 18, and tightening bolts for fixing the filter plate 6 are threaded onto the slide rails 18.

[0030] Specifically, the filter plates 6 are arranged in order of increasing pore size (e.g., 10μm→5μm→2μm→1μm) to achieve step-by-step filtration. The filter plates 6 are detachably connected to the inner wall of the filter tank 2 via the slide rail 18 and are fixed by tightening bolts. When the cleaning component is located at the sidemost position, the bolts can be removed to fix the filter plates 6, and the filter plates 6 can be quickly removed for disassembly, cleaning or replacement.

[0031] like Figure 1 and Figure 2 As shown, a drive mechanism is fixedly connected to the lower surface of the sedimentation tank 1, and a cleaning component is detachably connected to the drive mechanism. The drive mechanism includes a strip-shaped slide 11 fixedly connected to the lower surface of the sedimentation tank 1. A driver 12 is fixedly connected to one side of the strip-shaped slide 11. A lead screw 13 is fixedly connected to the output end of the driver 12. A slider 14 is slidably connected to the strip-shaped slide 11. An L-shaped plate 15 is fixedly connected to the lower surface of the slider 14.

[0032] Specifically, during the filtration of the supernatant, the driver 12 can be activated, which drives the lead screw 13 to rotate and drives the slider 14 to move back and forth along the strip slide 11, simultaneously driving the L-shaped plate 15 to move. This allows the cleaning component to move back and forth along the surface of the filter plate 6, so as to prevent impurities from accumulating on the filter plate 6 for a long time and clogging the filter holes.

[0033] like Figure 1 As shown, the driver 12 is a forward and reverse rotating motor.

[0034] Specifically, the function of the forward and reverse motor is to enable the lead screw 13 to rotate forward or reverse, thereby adjusting the position of the cleaning component.

[0035] like Figure 2 As shown, the cleaning assembly includes four inclined plates 16 mounted on an L-shaped plate 15, and brushes 17 are fixedly connected to the surface of the inclined plates 16.

[0036] Specifically, the inclined plate 16 moves with the L-shaped plate 15, thereby allowing the brush 17 to clean the impurities adhering to the surface of the filter plate 6 and prevent clogging of the filter holes.

[0037] like Figure 2 As shown, a water pump 19 is placed inside the filter tank 2, and a water suction pipe 20 is connected to the water pump 19.

[0038] Specifically, the water pump 19 is placed at the bottom of the filter tank 2 to pump out and recycle the filtered clean urea solution.

[0039] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. An automatic blowdown recovery device for urea solution, characterized by: The system includes a sedimentation tank (1), a filter tank (2) connected below the sedimentation tank (1), a partition (3) fixedly connected to the inner wall of the sedimentation tank (1), two drain pipes (4) fixedly connected below the sedimentation tank (1), a corrugated folded pipe (5) fixedly connected to the upper end of the drain pipe (4), a lifting mechanism for the extension and retraction of the corrugated folded pipe (5) fixedly connected to the upper end of the sedimentation tank (1), four filter plates (6) with different apertures installed on the inner wall of the filter tank (2), a sewage pipe installed on the rear side of the filter tank (2), a valve installed on the sewage pipe, and a guide plate fixedly connected to the inner wall of the filter tank (2).

2. The automatic blowdown recovery device for urea solution according to claim 1, characterized in that: The lifting mechanism includes a U-shaped plate (7) fixedly connected to the upper surface of the sedimentation tank (1), an electric telescopic rod (8) fixedly connected to the U-shaped plate (7), a connecting seat (9) fixedly connected to the free end of the electric telescopic rod (8), the connecting seat (9) fixedly connected to the inner wall of the corrugated folded tube (5), and a number of limiting posts (10) for limiting the folding direction of the corrugated folded tube (5) fixedly connected to the bottom wall of the sedimentation tank (1).

3. The automatic blowdown recovery device for urea solution according to claim 1, characterized in that: The filter pool (2) has slide rails (18) arranged at equal intervals fixedly connected to both sides of the inner wall. The filter plate (6) is detachably connected to the slide rails (18). The slide rails (18) are threaded with tightening bolts for fixing the filter plate (6).

4. The automatic blowdown recovery device for urea solution according to claim 1, characterized in that: A drive mechanism is fixedly connected to the lower surface of the sedimentation tank (1), and a cleaning component is detachably connected to the drive mechanism. The drive mechanism includes a strip slide (11) fixedly connected to the lower surface of the sedimentation tank (1). A driver (12) is fixedly connected to one side of the strip slide (11). A lead screw (13) is fixedly connected to the output end of the driver (12). A slider (14) is slidably connected to the strip slide (11). An L-shaped plate (15) is fixedly connected to the lower surface of the slider (14).

5. The automatic blowdown recovery device for urea solution according to claim 4, characterized in that: The driver (12) is a forward and reverse rotating motor.

6. The automatic blowdown recovery device for urea solution according to claim 4, characterized in that: The cleaning assembly includes four inclined plates (16) mounted on an L-shaped plate (15), and brushes (17) are fixedly connected to the surface of the inclined plates (16).

7. The automatic blowdown recovery device for urea solution according to claim 1, characterized in that: A water pump (19) is placed inside the filter pool (2), and a water suction pipe (20) is connected to the water pump (19).

Images