Urea hydrolysis waste gas collecting device

Abstract

The invention relates to the technical field of waste gas collection, in particular to a urea hydrolysis waste gas collection device which comprises a waste gas treatment tank, a collection pipeline, a hose, a gas collection hood and an adjusting assembly. The waste gas treatment tank is used for collecting waste gas generated in the urea hydrolysis process, one end of the collection pipeline is communicated with the waste gas treatment tank, the other end of the collection pipeline is communicated with one end of the hose, and the gas collection hood is mounted at the other end of the hose; the adjusting assembly is arranged between the gas collecting hood and the collecting pipeline, and the adjusting assembly adjusts the relative position of the gas collecting hood and the collecting pipeline by adjusting the bending angle of the hose. Thus, the collection angle of the collection pipeline can be conveniently adjusted, and according to the positions of openings in the upper surfaces or the side faces of different waste water tanks and the positions of the gas collection hoods, the adaptation degree of connection between the collection pipeline and the different waste water tanks is improved, and therefore the installation flexibility of the waste gas collection device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas collection, and particularly to a urea hydrolysis waste gas collection device. Background Art

[0002] Urea is an organic compound and has a wide range of applications in multiple fields such as agriculture, industry, medical and beauty, and animal husbandry. Urea hydrolysis refers to the chemical reaction in which urea decomposes into ammonia and carbon dioxide under certain conditions. The waste gas generated during the urea hydrolysis process mainly contains ammonia and carbon dioxide. If these waste gases are directly discharged into the atmosphere, it will cause certain pollution to the environment. In order to protect the environment and reduce pollutant emissions, it is necessary to collect and treat the urea hydrolysis waste gas.

[0003] Currently, when collecting urea hydrolysis waste gas, one end of the collection pipeline usually needs to be placed into the hydrolysis reactor, and the openings of different hydrolysis reactors are usually different. The openings of some hydrolysis reactors are located on the upper surface, and the openings of some hydrolysis reactors are located on the side, which easily makes the pipe orifice angle of the waste gas collection pipe inconvenient to be adjusted according to the hydrolysis reactors with different positions of the openings, reducing the flexibility of the collection pipe and the adaptability between different hydrolysis reactors. Summary of the Invention

[0004] The purpose of the present invention is to solve the drawbacks existing in the prior art, and a urea hydrolysis waste gas collection device is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A urea hydrolysis waste gas collection device, comprising: A waste gas treatment tank; A collection pipeline, one end of the collection pipeline is communicated with the waste gas treatment tank; A hose, one end of the hose is communicated with the other end of the collection pipeline; A gas collection hood, installed at the other end of the hose; An adjustment assembly, arranged between the gas collection hood and the collection pipeline, and the adjustment assembly adjusts the relative position of the gas collection hood and the collection pipeline by adjusting the bending angle of the hose.

[0006] In a possible design, the adjustment assembly includes: A mounting bracket, installed on the outer wall of the collection pipeline, the mounting bracket has an arc-shaped part, and a plurality of hole grooves are circumferentially arranged on the arc-shaped part; A connection block, installed on the outer wall of the gas collection hood, a guide hole is opened on the connection block, the arc-shaped part penetrates through the guide hole, and the inner wall of the guide hole is in sliding fit with the arc-shaped part; A limiting member, arranged in the guide hole, and the limiting member fixes the connection block at a corresponding position on the arc-shaped part by passing through any one of the hole grooves.

[0007] In a possible design, the adjusting assembly further includes a fixing shell, which is installed on one side of the connecting block. The inner cavity of the fixing shell is communicated with the guiding hole through an avoidance hole. The limiting member is slidably arranged at the avoidance hole. The limiting member includes: A clamping post, which slidably penetrates through the avoidance hole; A connecting plate, which is arranged in the inner cavity of the fixing shell and is connected to the end of the clamping post away from the guiding hole; A connecting column, which is arranged in the inner cavity of the fixing shell, one end of which is connected to the connecting plate, and the other end passes through the side hole of the fixing shell; A spring, which is sleeved on the clamping post, one end of which abuts against the inner wall of the fixing shell, and the other end abuts against the connecting plate.

[0008] In a possible design, the adjusting assembly further includes a pulling block, which is fixed to the end of the connecting column away from the clamping post.

[0009] In a possible design, a filtering assembly is arranged inside the air collecting hood. The filtering assembly includes: A limiting ring, which is fixed to the inner wall of the air collecting hood; A limiting frame, which is arranged below the limiting ring; A filter plate, which is arranged between the limiting ring and the limiting frame. The limiting frame can move along the axial direction of the air collecting hood to drive the filter plate to move out of or into the air collecting hood.

[0010] In a possible design, a stud is rotatably installed on the outer wall of the air collecting hood. One end of the stud is fixedly connected with a knob. A moving block is threadedly sleeved on the stud. The lower end of the moving block is fixedly provided with a connecting frame, and the lower end of the connecting frame is connected to the limiting frame.

[0011] In a possible design, the filter plate includes an upper filter plate and a lower filter plate, and a brush layer is arranged between the upper filter plate and the lower filter plate.

[0012] In a possible design, the brush layer includes a base layer and bristles. The base layer is a viscose fiber layer, and the bristles are compounded on the viscose fiber layer.

[0013] In a possible design, a folding pipe is connected through and between the collecting pipe and the waste gas treatment tank.

[0014] In a possible design, a support rod is fixedly connected to the lower surface of the collecting pipe. A shell rod is slidably connected to the outside of the support rod, and a bolt is threadedly connected to one side of the shell rod.

[0015] The present invention has the following beneficial effects: 1. Through the arrangement of the adjustment component, the waste gas collection device of the present invention has the function of facilitating the adjustment of the collection angle of the collection pipeline, which helps to adjust the pipeline angle according to different openings on the upper surface or side of different waste water tanks, improves the adaptability when connecting the collection pipeline with different waste water tanks, and thus improves the flexibility of the waste gas collection device.

[0016] 2. Through the arrangement of the filtering component, the waste gas collection device of the present invention has the function of facilitating the preliminary filtration of the waste gas entering the interior of the collection pipeline, which helps to intercept large particle pollutants in the waste gas, thereby reducing the entry of large particle pollutants into the interior of the collection pipeline, and thus preventing the pipeline from being corroded and damaged due to the adhesion of pollutants to the inner wall of the pipeline. Moreover, it is convenient to disassemble and assemble the filter plate, thus facilitating the cleaning and replacement of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure proposed by the present invention; Figure 2 is a schematic diagram of the clamping post structure proposed by the present invention; Figure 3 is a schematic diagram of the limiting ring structure proposed by the present invention; Figure 4 is a schematic diagram of the moving block structure proposed by the present invention; Figure 5 is a schematic diagram of the limiting frame structure proposed by the present invention; Figure 6 is a schematic diagram of the support rod structure proposed by the present invention; Figure 7 is a schematic diagram of the structure of the filtering component proposed by the present invention.

[0018] LEGEND DESCRIPTION: 1. Collection pipeline; 2. Folding pipe; 3. Waste gas treatment tank; 4. Hose; 5. Gas collection hood; 6. Connection block; 601. Guide hole; 7. Mounting frame; 8. Hole groove; 9. Fixed shell; 10. Connection column; 11. Connection plate; 12. Clamping post; 13. Spring; 14. Stud; 15. Knob; 16. Moving block; 17. Connection frame; 18. Limiting frame; 19. Limiting ring; 20. Filter plate; 201. Upper filter plate; 202. Lower filter plate; 21. Support rod; 22. Shell rod; 23. Bolt; 24. Pulling block; 25. Brush layer; 26. Water absorption layer. DETAILED DESCRIPTION OF THE INVENTION

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Referring to Figures 1-7 As shown, an exhaust gas collection device for urea hydrolysis is provided in an embodiment of the present invention. The device includes an exhaust gas treatment tank 3, a collection pipe 1, a hose 4, a gas collection hood 5, and an adjustment component. The exhaust gas treatment tank 3 is used to collect the exhaust gas generated during the urea hydrolysis process. The collected exhaust gas undergoes a chemical reaction in the exhaust gas treatment tank 3 and is discharged into the atmospheric environment after being purified. One end of the collection pipe 1 is connected to the exhaust gas treatment tank 3, the other end of the collection pipe 1 is connected to one end of the hose 4, and the gas collection hood 5 is installed at the other end of the hose 4; the adjustment component is arranged between the gas collection hood 5 and the collection pipe 1, and the adjustment component adjusts the relative position of the gas collection hood 5 and the collection pipe 1 by adjusting the bending angle of the hose 4. In this way, it is convenient to adjust the collection angle of the collection pipe, so as to adjust the position of the gas collection hood 5 according to the position of the opening on the upper surface or side of different wastewater tanks, improving the adaptability when the collection pipe is connected to different wastewater tanks, and thus improving the installation flexibility of the exhaust gas collection device.

[0021] Referring to Figure 2 As shown, in some embodiments, the adjustment component includes a mounting bracket 7, a connecting block 6, and a limiting member. Specifically, the mounting bracket 7 includes a base, a connecting rod, and an arc portion. The base is welded or bolt-fixed to the outer wall of the collection pipe 1. There are two connecting rods, and one end of each connecting rod is bolt-fixed to opposite sides of the base. The two ends of the arc portion are respectively connected to the other ends of the two connecting rods. The arc portion is in the shape of a section of a circular ring, and the length of the connecting rod is consistent with the radius of the arc portion. A plurality of hole slots 8 are evenly arranged along the circumferential direction on the arc portion; the connecting block 6 is installed on the outer wall of the gas collection hood 5, and a guiding hole 601 is opened on the connecting block 6. The guiding hole 601 is square, and the arc portion can pass through the guiding hole 601. The inner wall of the guiding hole 601 is in sliding fit with the surface of the arc portion, so that the connecting block can move in a circular motion along the arc portion. The limiting member is movably located in the guiding hole, and the limiting member can fix the connecting block at a corresponding position on the arc portion by passing through any one of the hole slots 8. In this way, after the arc portion slides to a suitable position on the inner wall of the guiding hole 601, the limiting member is passed through the corresponding hole slot 8, and the connecting block can be fixed at a corresponding position on the arc portion, thereby fixing the collection angle of the hose 4 and the position of the gas collection hood 5.

[0022] Referring to Figure 2As shown, in some of these embodiments, the adjusting assembly further includes a fixed housing 9. The fixed housing 9 is a U-shaped housing, which is integrally formed with the connecting block 6 or welded to one side of the connecting block 6. An avoidance hole is provided on the side wall of the connecting block 6 close to the fixed housing 9. The inner cavity of the fixed housing 9 communicates with the guiding hole 601 through the avoidance hole, and the limiting member is slidably arranged at the avoidance hole. Specifically, the limiting member includes a clamping post 12, a connecting plate 11, a connecting post 10, and a spring 13. The clamping post 12 movably penetrates through the avoidance hole. One end of the clamping post is located in the guiding hole 601, and the other end of the clamping post is located in the inner cavity of the fixed housing 9. A connecting plate 11 is also arranged in the inner cavity of the fixed housing 9, and the connecting plate 11 is welded to one end of the clamping post 12 located in the inner cavity of the fixed housing 9. A connecting post 10 is further arranged in the inner cavity of the fixed housing 9. One end of the connecting post 10 is connected to the connecting plate 11, and the other end of the connecting post 10 passes through the side hole of the fixed housing 9. The spring 13 is sleeved on the clamping post 12, with one end abutted against the inner wall of the fixed housing 9 and the other end abutted against the connecting plate 11. Specifically, the number of the connecting posts 10 is two. The two connecting posts 10 are parallel to each other, and each is sleeved with a spring 13. The two connecting posts 10 are connected by a pulling block 24. The pulling block 24 is fixed to the end of the connecting post 10 far from the clamping post and is located outside the fixed housing 9. By pulling the pulling block 24 outwards, the connecting plate 11 squeezes the spring 13, thereby driving the clamping post 12 to move outwards. At this time, the arc-shaped portion can slide along the inner wall of the guiding hole 601. When the clamping post 12 reaches a suitable position, release the pulling block 24, the spring 13 resets, the connecting plate 11 drives the clamping post 12 to penetrate into the corresponding hole slot 8, and after the clamping post 12 is engaged with the hole slot 8, the air collecting hood 5 is fixed.

[0023] Referring to Figure 3 , Figure 4 , Figure 5 As shown, in some of these embodiments, a filtering assembly is provided inside the air collecting hood 5. The filtering assembly includes a limiting ring 19, a limiting frame 18, and a filter plate 20. The limiting ring 19 is fixed to the inner wall of the air collecting hood 5. The limiting frame 18 is arranged below the limiting ring 19, and the limiting frame 18 can slide along the inner wall of the air collecting hood 5. The filter plate 20 is arranged between the limiting ring 19 and the limiting frame 18. The filter plate 20 is fixed to the limiting frame 18 by bolts, and the limiting frame can drive the filter plate 20 to move axially along the air collecting hood so that the filter plate 20 is moved out of or into the air collecting hood 5. Specifically, a bearing seat is installed on the outer wall of the air collecting hood 5. The upper section of the stud 14 is a light column section, and the light column section passes through the bearing seat. The upper end of the stud 14 is fixedly connected with a knob 15. The lower section of the stud 14 is a threaded section, and a moving block 16 is threadedly sleeved on the threaded section. The lower end of the moving block 16 is fixedly provided with a connecting frame 17, and the lower end of the connecting frame 17 is connected to the limiting frame 18. In this way, by rotating the knob 15, the stud 14 can be driven to rotate, thereby driving the connecting frame 17 and the limiting frame 18 to move up and down, so as to move the filter plate 20 out of or into the air collecting hood 5.

[0024] Refer to Figure 1 As shown, in some of these embodiments, a folding pipe 2 is connected between the collection pipe 1 and the waste gas treatment tank 3 in a through manner. The folding pipe 2 is convenient for folding and telescoping according to the height of the collection pipe 1. A support rod 21 is fixedly connected to the lower surface of the collection pipe 1. A shell rod 22 is slidably connected to the outside of the support rod 21. A bolt is threadedly connected to one side of the shell rod 22. The support rod 21 is convenient for supporting the collection pipe 1. The shell rod 22 is convenient for the sliding of the support rod 21. The bolt 23 is convenient for fixing the position of the support rod 21 after movement.

[0025] Working principle: When in use, first adjust the height of the collection pipe 1 according to the height of the wastewater tank. Turn the bolt 23 to loosen it, so that the support rod 21 is in a slidable state, and then move the position of the support rod 21 inside the shell rod 22, which is convenient for driving the adjustment of the height of the collection pipe 1. After adjusting to the appropriate position, tighten the bolt 23, so as to facilitate fixing the height of the collection pipe 1; When it is necessary to adjust the angle of the waste gas collection pipe 1, pull the pull block 24 at one end of the two connecting columns 10, so that the connecting columns 10 slide towards one side of the fixed shell 9. The connecting plate 11 drives the clamping column 12 to disengage from the corresponding hole slot 8 and move into the fixed shell 9. Then slide the connecting block 6, so that the connecting block 6 slides on the arc part. The connecting block 6 drives the air collection hood 5 to move. At this time, the hose 4 is bent to adjust the air collection position and angle of the air collection hood 5. After adjusting to the appropriate angle, release the pulled pull block. Under the resilience of the spring 13, push the connecting plate 11 to drive the clamping column 12 to snap into the corresponding hole slot 8, so as to fix the position of the adjusted air collection hood 5; When collecting waste gas, the gas will be preliminarily filtered by the filter plate 20 inside the air collection hood 5, and the impurities filtered out will stay outside the filter plate 20. When the impurities outside the filter plate 20 accumulate too much and affect the filtration, turn the knob 15. The knob 15 drives the screw column 14 to rotate. The screw column 14 drives the moving block 16, the connecting frame 17, and the limiting frame 18 to move downward. The filter plate 20 moves synchronously with the limiting frame 18. When the limiting frame 18 moves to the outside of the air collection hood 5, remove the filter plate 20 from the upper surface of the limiting frame 18. When cleaning the filter plate 20, reinstall it on the limiting frame 18 after cleaning.

[0026] Refer to Figure 7As shown, in some specific embodiments of the present application, the filter plate includes an upper filter plate 201 and a lower filter plate 202, and a brush layer 25 is provided between the upper filter plate and the lower filter plate. Specifically, the brush layer 25 includes a base layer and bristles. The base layer is a viscose layer, and the bristles are compounded on the viscose layer. The base layer is fixed on the upper filter plate, and the bristles face the lower filter plate. In this way, by moving the lower filter plate 202 up and down, the distance between the upper filter plate 201 and the lower filter plate 202 can be adjusted. When the distance between the upper filter plate 201 and the lower filter plate 202 becomes larger, the bristles are not squeezed, and the gaps between the bristles are larger, which can improve the filtration efficiency; when the distance between the upper filter plate 201 and the lower filter plate 202 becomes smaller, the bristles are squeezed, and the gaps between the bristles become smaller to reduce the speed of gas passing through, so as to be applicable to filtering smaller impurities in the waste gas. At the same time, by squeezing the brush layer 25, some bristles can pass through the gaps of the lower filter plate 202, thereby cleaning the surface of the lower filter plate 202 to prevent the accumulation of unreacted urea particles, crystals, etc. on the lower filter plate 202, resulting in the blockage of the lower filter plate 202, thus ensuring the normal flow of the waste gas.

[0027] Referring to Figure 7 As shown, in some embodiments, a water absorption layer 26 is further provided between the upper filter plate 201 and the brush layer 25. For example, the water absorption layer 26 is a sponge layer or an activated carbon layer. By setting the sponge layer or the activated carbon layer, the water vapor in the waste gas can be adsorbed in time to prevent ammonia in the waste gas from combining with water to form ammonia water during the flow process, which corrodes the metal collection device and improves the service life of the equipment. Specifically, at regular intervals, the lower filter plate 202 is moved upward, and some bristles pass through the gaps of the lower filter plate 202 to crush the unreacted urea particles, crystals, etc. accumulated on the lower filter plate 202; at the same time, the lower filter plate 202 squeezes the water absorption layer 26 to release the water in it, and the released water flows along the bristles to the lower filter plate 202, and cooperates with the bristles to wash and clean the urea particles, crystals, etc. on the lower filter plate 202. After the cleaning is completed, the lower filter plate 202 is moved downward to make the upper filter plate 201, the brush layer 25 and the lower filter plate 202 return to their respective positions.

[0028] Specifically, in some embodiments, a scale is provided on the air collecting hood 5, a marking pointer is provided on the moving block 16, and an upper limit and a lower limit are marked on the scale. By rotating the bolt 14, the marking pointer of the moving block 16 is moved between the upper limit and the lower limit to clean the lower filter plate 202. Specifically, when the marking pointer aligns with the upper limit, the lower filter plate 202 squeezes the water absorption layer 26 to the greatest extent to release the water in it; when the marking pointer aligns with the lower limit, the upper filter plate 201, the brush layer 25 and the lower filter plate 202 return to their respective positions.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A urea hydrolysis waste gas collection device, characterized in that, Comprising: An exhaust gas treatment tank (3); A collection pipeline (1), one end of the collection pipeline (1) being communicated with the exhaust gas treatment tank (3); A hose (4), one end of the hose (4) being communicated with the other end of the collection pipeline (1); An air collecting hood (5), installed at the other end of the hose (4); An adjusting assembly, arranged between the air collecting hood (5) and the collection pipeline (1), and the adjusting assembly adjusts the relative position between the air collecting hood (5) and the collection pipeline (1) by adjusting the bending angle of the hose (4).

2. The urea hydrolysis waste gas collection device according to claim 1, characterized in that, The adjusting assembly includes: A mounting bracket (7), installed on the outer wall of the collection pipeline (1), the mounting bracket (7) having an arc portion, and a plurality of hole grooves (8) being circumferentially formed on the arc portion; A connecting block (6), installed on the outer wall of the air collecting hood (5), a guiding hole (601) being formed on the connecting block (6), the arc portion passing through the guiding hole (601), and the inner wall of the guiding hole (601) being in sliding fit with the arc portion; A limiting member, arranged in the guiding hole (601), and the limiting member fixes the connecting block to a corresponding position on the arc portion by passing through any one of the hole grooves (8).

3. The urea hydrolysis waste gas collection device according to claim 2, characterized in that, The adjusting assembly further includes a fixing shell (9), the fixing shell (9) being installed on one side of the connecting block (6), the inner cavity of the fixing shell (9) being communicated with the guiding hole through an avoidance hole, the limiting member being slidably arranged at the avoidance hole, and the limiting member includes: A clamping post (12), slidably penetrating through the avoidance hole; A connecting plate (11), arranged in the inner cavity of the fixing shell (9) and connected to one end of the clamping post (12) away from the guiding hole; A connecting column (10), arranged in the inner cavity of the fixing shell (9), one end being connected to the connecting plate (11) and the other end passing through a side hole of the fixing shell (9); A spring (13), sleeved on the clamping post (12), one end abutted against the inner wall of the fixing shell (9) and the other end abutted against the connecting plate (11).

4. The urea hydrolysis waste gas collection device according to claim 3, wherein: It further includes a pulling block (24), the pulling block (24) being fixed to one end of the connecting column (10) away from the clamping post (12).

5. The urea hydrolysis waste gas collection device according to any one of claims 1-4, characterized in that: A filtering assembly is arranged inside the air collecting hood (5), and the filtering assembly includes: A limiting ring (19), fixed to the inner wall of the air collecting hood (5); A limiting frame (18), arranged below the limiting ring (19); A filter plate (20), arranged between the limiting ring (19) and the limiting frame (18), and the limiting frame can move axially along the air collecting hood to drive the filter plate (20) to move out of or into the air collecting hood (5).

6. The urea hydrolysis waste gas collection device according to claim 5, wherein: A stud (14) is rotatably installed on the outer wall of the air collecting hood (5), one end of the stud (14) being fixedly connected with a knob (15), a moving block (16) being threadedly sleeved on the stud (14), a connecting frame (17) being fixedly provided at the lower end of the moving block (16), and the lower end of the connecting frame (17) being connected to the limiting frame (18).

7. The urea hydrolysis waste gas collection device according to claim 6, characterized in that: The filter plate includes an upper filter plate (201) and a lower filter plate (202), and a brush layer (25) is provided between the upper filter plate (201) and the lower filter plate (202).

8. The urea hydrolysis waste gas collection device according to claim 7, characterized in that: The brush layer (25) includes a base layer and bristles. The base layer is a viscose layer, and the bristles are compounded on the viscose layer.

9. The urea hydrolysis waste gas collection device according to claim 5, characterized in that: A folding pipe (2) is connected in a through manner between the collection pipe (1) and the waste gas treatment tank (3).

10. The urea hydrolysis waste gas collection device according to claim 5, wherein: A support rod (21) is fixedly connected to the lower surface of the collection pipe (1), a shell rod (22) is slidably connected to the outside of the support rod (21), and a bolt (23) is threadedly connected to one side of the shell rod (22).

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