Waste liquid treatment device for synthesis ammonia and urea production

Abstract

The utility model discloses a waste liquid treatment device for synthesis ammonia and urea production, and particularly relates to the field of waste liquid treatment in urea production, which comprises a box body, a partition plate is fixedly connected to the middle of the box body, and a first connecting plate is fixedly connected to the bottom of the partition plate. And the bottom of the first connecting plate is fixedly connected with a first porous plate. According to the solid-liquid separation device, firstly, a valve is started to control opening of a liquid discharging round pipe, liquid passing through the interior of the liquid discharging round pipe can be filtered through a filter screen, solid-liquid separation is achieved, a second motor is started to control a blocking plate to move to open the interior of a solid discharging square pipe, solid is conveniently discharged to the top of a first porous plate, and the solid discharging efficiency is improved. And secondly, when the waste liquid is discharged, solid waste accumulated on the surface of the filter screen can be scraped through the stirring mechanism, and the liquid discharging effect of the liquid discharging round pipe is not affected, so that the solid-liquid separation effect is improved, and the later waste liquid treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste liquid treatment in urea production, and more specifically, to a waste liquid treatment device used in the production of synthetic ammonia and urea. Background Art

[0002] Synthetic ammonia refers to ammonia directly synthesized from nitrogen and hydrogen under high temperature, high pressure and in the presence of a catalyst. It is a basic inorganic chemical process. Ammonia is the main raw material for the fertilizer industry and basic organic chemical industry. Urea is a high-concentration nitrogen fertilizer and a neutral, quick-acting fertilizer. It can also be used to produce a variety of compound fertilizers. The production of synthetic ammonia and urea will produce waste liquid, which needs to be treated with a waste liquid treatment device to avoid environmental pollution.

[0003] The existing waste liquid treatment equipment for synthetic ammonia and urea production adopts an ammonia evaporation tower method, which has high investment costs, complex treatment procedures, and a large footprint. The plant area required for using this method is large, and the urea in the waste liquid cannot be recycled, resulting in a waste of resources.

[0004] The utility model with Chinese patent application number CN201621484166.6 discloses a waste liquid treatment device for the production of synthetic ammonia and urea, including a waste liquid treatment device body, a sealing cover installed on the top of the waste liquid treatment device body, a solar panel installed on the top of the sealing cover, a sedimentation recovery tank installed inside the waste liquid treatment device body, and a waste liquid delivery pipe is provided at a position corresponding to the sedimentation recovery tank on one side of the waste liquid treatment device body, and a booster pump is installed on the waste liquid delivery pipe. The utility model saves more space, electricity and operating costs, and transports phosphate and magnesium salts to the sedimentation recovery tank through a chemical material delivery pipe to react with ammonia to generate struvite and recycle it. On the one hand, it reduces the ammonia content in the waste liquid, and on the other hand, it can recycle and reuse ammonia. Struvite can be used as fertilizer, especially as flower fertilizer. Reaction gas is introduced into the waste liquid, and the heating tube can be used to accelerate the release of ammonia in the waste liquid.

[0005] Then, combined with the drawings in the specification, it can be seen that the sedimentation tank is fixed inside the treatment device, and the precipitated solids inside the sedimentation tank are inconvenient to discharge. When the liquid is extracted, it is easy to extract the flowing solid waste into the gas pool, or the residual waste liquid in the sedimentation tank leads to incomplete solid-liquid separation, affecting the waste liquid treatment effect. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a waste liquid treatment device used in the production of synthetic ammonia and urea to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste liquid treatment device for the production of synthetic ammonia and urea, comprising a box body, a partition plate is fixedly connected to the middle of the box body, a first connecting plate is fixedly connected to the bottom of the partition plate, a first porous plate is fixedly connected to the bottom of the first connecting plate, a solid waste discharge pipe is arranged on one side of the box body, and a waste gas treatment box and an electric control box are arranged on the other side;

[0008] A stirring mechanism is provided on the top of the partition plate, an opening and closing mechanism is provided on the top of the solid waste discharge pipe, a second porous plate and an electric heating pipe are provided at the bottom of the inner cavity of the box body, a liquid discharge round pipe and a solid discharge square pipe are fixedly connected to the bottom of the partition plate, a valve is provided in the middle of the liquid discharge round pipe, and a filter screen is provided at the top of the inner cavity of the liquid discharge round pipe;

[0009] A blocking plate is inserted at one side of the solid material discharge square tube, one end of the blocking plate is fixedly connected to a second connecting plate, a first threaded rod is inserted at the middle of the second connecting plate, and one end of the first threaded rod is connected to a second motor.

[0010] Preferably, a liquid inlet pipe is provided on the top of the box body, an observation window is provided on one side of the box body, a liquid level sensor is provided on one side of the inner cavity of the box body, the electric control box is electrically connected to the electric heating tube, and the input end of the exhaust gas treatment box is connected to the inner cavity of the box body.

[0011] Preferably, one end of the first porous plate is fixedly connected to the bottom wall of the inner cavity of the solid waste discharge pipe, the liquid discharge circular tube and the solid discharge square tube are respectively arranged on both sides of the first connecting plate, and the solid discharge square tube is arranged on the top of the first porous plate.

[0012] Preferably, it includes a medicine adding box, the bottom feed pipe of the medicine adding box is provided with a flow valve, the second porous plate is arranged on the top of the electric heating tube, the top wall of the filter screen is fitted with the top wall of the partition plate, the first threaded rod is threadedly connected with the second connecting plate, and the sealing plate is limitedly slidably connected with the wall of the partition plate.

[0013] Preferably, the stirring mechanism includes a first motor fixed on the top of the box body, the output end of the first motor is connected to a rotating rod, one end of the rotating rod extends to the interior of the box body and is fixedly connected to four stirring plates, the bottom wall of the stirring plate is in contact with the top wall of the partition plate, and a plurality of through holes are provided on the top of the stirring plate.

[0014] Preferably, the opening and closing mechanism includes an auxiliary plate fixed to the top of the box body close to the solid waste discharge pipe, and a blocking plug is inserted into the top of the solid waste discharge pipe, and the cross-sectional shape of the blocking plug is set to be "L" shape.

[0015] Preferably, a second threaded rod and a stabilizing rod are inserted in the middle of the top horizontal plate of the blocking plug plate, a third motor is connected to the bottom of the second threaded rod, and both ends of the stabilizing rod are fixedly connected to the auxiliary plate and the wall of the solid waste discharge pipe respectively.

[0016] Technical effects and advantages of the utility model:

[0017] 1. The utility model firstly starts the valve to control the opening of the liquid feeding round pipe, and can filter the liquid passing through the liquid feeding round pipe through the filter screen to achieve solid-liquid separation, and starts the second motor to control the movement of the blocking plate to open the inside of the solid feeding square pipe, so as to facilitate the solid feeding on the top of the first porous plate and perform solid-liquid separation. Secondly, the stirring mechanism can scrape off the solid waste accumulated on the surface of the filter screen when the waste liquid is discharged, without affecting the liquid feeding effect of the liquid feeding round pipe, thereby improving the solid-liquid separation effect and the later waste liquid treatment effect;

[0018] 2. The utility model also provides a stirring mechanism to stir when adding waste liquid and reagents, thereby improving the mixing efficiency, thereby improving the precipitation efficiency, and improving the waste liquid treatment efficiency. The opening and closing mechanism can control the opening and closing of the solid waste discharge pipe, and can control the solid waste to gather on the top of the first porous plate to separate the solid and liquid, avoid residual liquid in the solid waste, improve the separation quality, and heat the ammonia in the waste liquid by the electric heating tube to perform secondary separation and discharge, thereby improving the waste liquid treatment effect.

[0019] In summary, through the mutual influence of the above-mentioned multiple effects, the completeness of solid-liquid separation can be improved and the waste liquid treatment effect can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 This is a schematic structural diagram of the utility model from another angle.

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0023] Figure 4 It is a front cross-sectional structural schematic diagram of the utility model.

[0024] Figure 5 For this utility model Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0025] Figure 6 It is a structural schematic diagram of the stirring mechanism of the utility model.

[0026] The accompanying drawings are marked as follows: 1. box body; 2. partition plate; 3. first connecting plate; 4. first porous plate; 5. solid waste discharge pipe; 6. second porous plate; 7. electric heating tube; 8. electric control box; 9. liquid level sensor; 10. exhaust gas treatment box; 11. reagent adding box; 12. liquid inlet pipe; 13. observation window; 14. first motor; 15. rotating rod; 16. stirring plate; 17. through hole; 18. liquid discharge circular pipe; 19. valve; 20. filter screen; 21. solid discharge square pipe; 22. sealing plate; 23. second connecting plate; 24. first threaded rod; 25. second motor; 26. auxiliary plate; 27. sealing plug plate; 28. second threaded rod; 29. ​​stabilizing rod; 30. third motor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] As attached Figure 1-6 A waste liquid treatment device for synthetic ammonia and urea production shown in the figure comprises a box body 1, a partition plate 2 is fixedly connected to the middle of the box body 1, a first connecting plate 3 is fixedly connected to the bottom of the partition plate 2, a first porous plate 4 is fixedly connected to the bottom of the first connecting plate 3, and the solid particles falling on the top of the first porous plate 4 can be filtered to separate the liquid and the solid, and the liquid falls to the bottom of the inner cavity of the box body 1, a solid waste discharge pipe 5 is arranged on one side of the box body 1, and solid waste is conveniently discharged through the solid waste discharge pipe 5, and a waste gas treatment box 10 and an electric control box 8 are arranged on the other side, and the gas generated by the reaction is conveniently discharged through the waste gas treatment box 10;

[0029] A stirring mechanism is provided on the top of the partition plate 2, an opening and closing mechanism is provided on the top of the solid waste discharge pipe 5, a second porous plate 6 and an electric heating tube 7 are provided at the bottom of the inner cavity of the box body 1, a liquid discharge circular pipe 18 and a solid discharge square pipe 21 are fixedly connected to the bottom of the partition plate 2, a valve 19 is provided in the middle of the liquid discharge circular pipe 18, and a filter screen 20 is provided at the top of the inner cavity of the liquid discharge circular pipe 18. The precipitation agent and the waste liquid can be stirred by the stirring mechanism to improve the precipitation efficiency, and the opening and closing mechanism can be used to conveniently control the opening and closing of the middle part of the solid waste discharge pipe 5, and the impact force of the liquid falling can be reduced by the second porous plate 6, and the waste liquid can be heated by the electric heating tube 7 to remove ammonia ions, and the liquid and solid can be discharged by the liquid discharge circular pipe 18 and the solid discharge square pipe 21, and the filter screen 20 can prevent the solid from falling through the liquid discharge circular pipe 18;

[0030] A sealing plate 22 is inserted on one side of the solid discharge square tube 21, one end of the sealing plate 22 is fixedly connected to a second connecting plate 23, a first threaded rod 24 is inserted in the middle of the second connecting plate 23, one end of the first threaded rod 24 is connected to a second motor 25, and by starting the second motor 25 to control the start of the first threaded rod 24, the second connecting plate 23 can be controlled to drive the sealing plate 22 to move and open the interior of the solid discharge square tube 21, so as to facilitate the discharge of solids.

[0031] As attached Figure 1 , 2 As shown in Figure 3, a liquid inlet pipe 12 is provided on the top of the box body 1, an observation window 13 is provided on one side of the box body 1, a liquid level sensor 9 is provided on one side of the inner cavity of the box body 1, the electric control box 8 is electrically connected to the electric heating tube 7, and the input end of the exhaust gas treatment box 10 is connected to the inner cavity of the box body 1. The waste liquid is conveniently added through the liquid inlet pipe 12, and the amount of liquid inside the box body 1 is conveniently observed through the observation window 13, so that the treated liquid can be discharged in time. The amount of liquid at the bottom of the inner cavity of the box body 1 is conveniently detected through the liquid level sensor 9, and the generated gas is discharged through the exhaust gas treatment box 10.

[0032] As attached Figure 3 , 4 As shown in Figure 5, one end of the first porous plate 4 is fixedly connected to the bottom wall of the inner cavity of the solid waste discharge pipe 5, the liquid discharge circular pipe 18 and the solid discharge square pipe 21 are respectively arranged on both sides of the first connecting plate 3, and the solid discharge square pipe 21 is arranged on the top of the first porous plate 4. The solid on the top of the first porous plate 4 can be guided and gathered at one end close to the solid waste discharge pipe 5, which is convenient for discharge through the solid waste discharge pipe 5, and the solid-liquid separation discharge can be achieved through the liquid discharge circular pipe 18 and the solid discharge square pipe 21.

[0033] As attached Figure 3-5 As shown, the bottom discharge pipe of the medicine adding box 11 is provided with a flow valve, the second porous plate 6 is arranged on the top of the electric heating tube 7, the top wall of the filter screen 20 is fitted with the top wall of the partition plate 2, the first threaded rod 24 is threadedly connected with the second connecting plate 23, and the sealing plate 22 is limitedly slidably connected with the wall of the partition plate 2. The flow valve is used to conveniently control the amount of medicine added in the middle of the medicine adding box 11, and the filter screen 20 is used to prevent solids from being discharged through the liquid discharge circular pipe 18, and the rotation of the first threaded rod 24 can control the movement of the sealing plate 22, thereby controlling the opening and closing of the solid discharge square pipe 21.

[0034] As attached Figure 3 , 4As shown in Figure 6, the stirring mechanism includes a first motor 14 fixed on the top of the box body 1, and the output end of the first motor 14 is connected to a rotating rod 15. One end of the rotating rod 15 extends to the inside of the box body 1 and is fixedly connected to four stirring plates 16. The bottom wall of the stirring plate 16 fits with the top wall of the partition plate 2. A plurality of through holes 17 are provided on the top of the stirring plate 16. The first motor 14 is started to control the rotating rod 15 to drive the stirring plate 16 to rotate, which can push the solid particles gathered on the top of the filter screen 20 and stir the liquid on the top of the partition plate 2 to improve the precipitation and mixing effect. The solid precipitation particles can be pushed to one side of the solid discharge square tube 21 and discharged through the solid discharge square tube 21 to realize solid discharge.

[0035] As attached Figure 1 , 3 As shown in , 4, the opening and closing mechanism includes an auxiliary plate 26 fixed to the top of the box body 1 close to the solid waste discharge pipe 5, and a blocking plug 27 is inserted at the top of the solid waste discharge pipe 5. The cross-sectional shape of the blocking plug 27 is set to be "L"-shaped, and the middle part of the solid waste discharge pipe 5 can be blocked by the blocking plug 27.

[0036] As attached Figure 1 , 3 As shown in Figure 4, a second threaded rod 28 and a stabilizing rod 29 are inserted in the middle of the top horizontal plate of the blocking plug 27, and a third motor 30 is connected to the bottom of the second threaded rod 28. The two ends of the stabilizing rod 29 are respectively fixedly connected to the auxiliary plate 26 and the wall of the solid waste discharge pipe 5. By starting the third motor 30 to control the rotation of the second threaded rod 28, the blocking plug 27 can be controlled to move up and down, thereby realizing the opening and closing of the inside of the solid waste discharge pipe 5, and the stability of the movement of the blocking plug 27 is improved by the stabilizing rod 29.

[0037] Working principle of the utility model: when in use, waste liquid only needs to be input into the interior of the box body 1 through the liquid inlet pipe 12, and the flow valve can be controlled to input the medicine in the medicine adding box 11 into the interior of the box body 1, and at the same time, the first motor 14 is started to control the stirring plate 16 to rotate and stir, so that the waste liquid produces solid condensation and precipitation;

[0038] Then, the control valve 19 is opened to allow the settled pages on the top of the partition plate 2 to be discharged into the bottom of the box body 1 through the liquid discharge pipe 18. At the same time, the solid particles on the top of the filter screen 20 can be pushed away by the rotation of the stirring plate 16 to prevent the filter screen 20 from being blocked;

[0039] Then, the second motor 25 is started to control the opening of the interior of the solid discharge square tube 21 when the blocking plate 22 moves, and the solid waste and sediment on the top of the partition plate 2 and the residual liquid are allowed to fall on the top of the first porous plate 4 through the solid discharge square tube 21, and are filtered by the first porous plate 4 to separate the solid and liquid;

[0040] The electric control box 8 controls the electric heating tube 7 to heat the waste liquid, remove nitrogen ions in the waste liquid, and purify and filter the waste gas through the waste gas treatment box 10. After completion, the waste liquid is discharged through the drain pipe on the rear side of the box body 1, and the third motor 30 is started to control the blocking plug plate 27 to move upward in turn, so that the solid waste is discharged through the solid waste discharge pipe 5, and the process is completed.

[0041] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste liquid treatment device for the production of synthetic ammonia and urea, comprising a housing (1), characterized in that: A partition plate (2) is fixedly connected to the middle of the box body (1), a first connecting plate (3) is fixedly connected to the bottom of the partition plate (2), a first porous plate (4) is fixedly connected to the bottom of the first connecting plate (3), a solid waste discharge pipe (5) is arranged on one side of the box body (1), and a waste gas treatment box (10) and an electric control box (8) are arranged on the other side; A stirring mechanism is provided on the top of the partition plate (2), an opening and closing mechanism is provided on the top of the solid waste discharge pipe (5), a second porous plate (6) and an electric heating pipe (7) are provided at the bottom of the inner cavity of the box body (1), a liquid discharge circular pipe (18) and a solid discharge square pipe (21) are fixedly connected to the bottom of the partition plate (2), a valve (19) is provided in the middle of the liquid discharge circular pipe (18), and a filter screen (20) is provided at the top of the inner cavity of the liquid discharge circular pipe (18); A blocking plate (22) is inserted into one side of the solid material discharge square tube (21); one end of the blocking plate (22) is fixedly connected to a second connecting plate (23); a first threaded rod (24) is inserted into the middle of the second connecting plate (23); one end of the first threaded rod (24) is connected to a second motor (25).

2. A waste liquid treatment device for the production of synthetic ammonia and urea according to claim 1, characterized in that: The top of the box (1) is provided with a liquid inlet pipe (12), one side of the box (1) is provided with an observation window (13), one side of the inner cavity of the box (1) is provided with a liquid level sensor (9), the electric control box (8) is electrically connected to the electric heating pipe (7), and the input end of the exhaust gas treatment box (10) is connected to the inner cavity of the box (1).

3. The waste liquid treatment device for the production of synthetic ammonia and urea according to claim 1, characterized in that: One end of the first porous plate (4) is fixedly connected to the bottom wall of the inner cavity of the solid waste discharge pipe (5); the liquid discharge circular pipe (18) and the solid discharge square pipe (21) are respectively arranged on both sides of the first connecting plate (3); and the solid discharge square pipe (21) is arranged on the top of the first porous plate (4).

4. A waste liquid treatment device for the production of synthetic ammonia and urea according to claim 1, characterized in that: It comprises a medicine adding box (11), the bottom feed pipe of the medicine adding box (11) is provided with a flow valve, the second porous plate (6) is arranged on the top of the electric heating tube (7), the top wall of the filter screen (20) is in contact with the top wall of the partition plate (2), the first threaded rod (24) is threadedly connected to the second connecting plate (23), and the blocking plate (22) is limitedly slidably connected to the wall of the partition plate (2).

5. The waste liquid treatment device for the production of synthetic ammonia and urea according to claim 1, characterized in that: The stirring mechanism comprises a first motor (14) fixed to the top of the box (1); the output end of the first motor (14) is connected to a rotating rod (15); one end of the rotating rod (15) extends into the interior of the box (1) and is fixedly connected to four stirring plates (16); the bottom wall of the stirring plate (16) is in contact with the top wall of the partition plate (2); and a plurality of through holes (17) are provided at the top of the stirring plate (16).

6. The waste liquid treatment device for the production of synthetic ammonia and urea according to claim 1, characterized in that: The opening and closing mechanism comprises an auxiliary plate (26) fixed to the top of the box body (1) close to the solid waste discharge pipe (5), a blocking plug plate (27) is inserted into the top of the solid waste discharge pipe (5), and the cross-sectional shape of the blocking plug plate (27) is set to be "L"-shaped.

7. A waste liquid treatment device for the production of synthetic ammonia and urea according to claim 6, characterized in that: A second threaded rod (28) and a stabilizing rod (29) are inserted into the middle of the top transverse plate of the plugging plate (27); a third motor (30) is connected to the bottom of the second threaded rod (28); and two ends of the stabilizing rod (29) are respectively fixedly connected to the auxiliary plate (26) and the wall of the solid waste discharge pipe (5).

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