Urea wastewater recovery device

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a urea wastewater recovery device, which is characterized in that the outlet end of an adsorption tower is fixedly communicated with the inlet end of a collecting pipe, the outlet end of the collecting pipe is correspondingly provided with a collecting barrel, the upper end of an aeration tank is fixedly connected with two support plates which correspond to each other front and back, and the upper end of the aeration tank is fixedly connected with a water tank. Longitudinal shafts are fixedly connected to the opposite ends of the two supporting plates, swing rods are rotatably connected to the middles of the longitudinal shafts, mounting frames are fixedly connected to the lower ends of the swing rods, hoops are integrally and uniformly distributed on the mounting frames in the transverse direction, and aeration pipes are coaxially and fixedly connected to the hoops; the longitudinal shaft is fixedly connected with a power device used for driving the swing rod to swing in a reciprocating mode.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment equipment, in particular to a urea wastewater recovery device. Background Art

[0002] Urea is not only one of the main fertilizer products, but also an important chemical raw material, so the output of urea in my country is extremely high. For the wastewater generated in the urea production process, since there is still a small amount of urea components remaining in it, if it is directly discharged, it will lead to eutrophication of the water body, and then cause pollution of the water body and the surrounding environment. Therefore, the urea wastewater needs to be treated before it can be discharged. At present, in the process of treating urea wastewater, the aeration tank is one of the components of the commonly used denitrification equipment, but the aeration pipe in the existing aeration tank is often fixed at the bottom of the pool, and its aeration range is fixed, which leads to its limited denitrification efficiency. In this regard, this application specifically proposes a urea wastewater recovery device to solve the above problems. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a urea wastewater recovery device, which solves the problem. The technical solution is as follows: the device comprises a liquid inlet pipe and an aeration tank corresponding to the outlet end of the liquid inlet pipe, the outlet end of the aeration tank is fixedly connected to the inlet end of a first delivery pump, the outlet end of the first delivery pump is fixedly connected to the inlet end of a denitrification tower, the outlet end of the denitrification tower is fixedly connected to the inlet end of a second delivery pump, the outlet end of the second delivery pump is fixedly connected to the inlet end of an adsorption tower, characterized in that the outlet end of the adsorption tower is fixedly connected to the inlet end of a collecting pipe, and a collecting bucket is arranged corresponding to the outlet end of the collecting pipe, two supporting plates corresponding to each other in front and back are fixedly connected to the upper end of the aeration tank, the opposite ends of the two supporting plates are fixedly connected to a longitudinal axis, a swing rod is rotatably connected to the middle part of the longitudinal axis, the lower end of the swing rod is fixedly connected to a mounting frame, the mounting frame is uniformly and integrally provided with clamps along the transverse direction, each of the clamps is coaxially fixedly connected to an aeration pipe, and the longitudinal axis is fixedly connected to a power device for driving the swing rod to swing back and forth.

[0004] Preferably, the power device includes a support seat fixedly connected to the longitudinal axis, the support seat is fixedly connected to a motor, the output shaft of the motor is fixedly connected to one end of a driving rod, the other end of the driving rod is fixedly connected to one end of an insertion rod, and the rocker arm is provided with a driving groove corresponding to the insertion rod.

[0005] Preferably, the inlet ends of the first delivery pump and the second delivery pump are respectively equipped with delivery valves

[0006] Preferably, a recovery pipe is fixedly connected to the bottom of the collection barrel, and a recovery valve is installed on the recovery pipe.

[0007] The beneficial effects of the utility model are:

[0008] 1. When the present application is in use, there are microorganisms in the aeration tank that can nitrify urea wastewater, so that the urea wastewater can be initially denitrified. In order to increase the denitrification efficiency of the aeration tank, the power device arranged in the present application can drive the swing arm to swing back and forth in the aeration tank, and then the aeration pipe and other related components can synchronously swing back and forth in the aeration tank. The reciprocating swing of the aeration pipe will greatly increase the effective range of aeration, thereby improving the denitrification efficiency of the microorganisms in the aeration tank, and the aeration pipe can mechanically stir the wastewater during the reciprocating swing process, further increasing the contact effect between the wastewater and the microorganisms, thereby ensuring its production efficiency.

[0009] 2. After the initial denitrification in the aeration tank, the wastewater is transported to the denitrification tower and the adsorption tower in turn through the first delivery pump and the second delivery pump for further denitrification treatment. The treated wastewater has a low ammonia nitrogen content and can be transported to a collection barrel for storage, so that it can be transported to the urea production line through a recovery pipe for recycling and utilization, avoiding waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a stereoscopic view of the utility model from the first perspective.

[0011] Figure 2 This is a partial three-dimensional cross-sectional view from a second viewing angle of the utility model.

[0012] Figure 3 It is an enlarged view of area A in the partial stereoscopic cross-sectional view from the second viewing angle of the utility model.

[0013] Figure 4 It is an enlarged view of area B in the partial stereoscopic cross-sectional view from the second viewing angle of the utility model.

[0014] Figure 5 It is the front view of the utility model.

[0015] Reference numerals

[0016] 1. Liquid inlet pipe, 2. Aeration tank, 3. First delivery pump, 4. Denitrification tower, 5. Adsorption tower, 6. Collection pipe, 7. Collection barrel, 8. Support plate, 9. Longitudinal axis, 10. Rocker arm, 11. Mounting frame, 12. Clamp, 13. Aeration pipe, 14. Power unit, 15. Support seat, 16. Motor, 17. Output shaft, 18. Drive rod, 19. Insert rod, 20. Drive groove, 21. Delivery valve, 22. Recovery pipe, 23. Recovery valve, 24. Second delivery pump. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-5 The specific implementation methods of the utility model are further described in detail.

[0018] Embodiment 1, the technical solution is that when the present application is in use, urea wastewater can be transported to the aeration tank 2 through the liquid inlet pipe 1 for preliminary denitrification treatment. The outlet end of the recovery pipe 22 can be connected to the urea production line in the plant area, and then the treated wastewater can be transported to the urea production line for recycling. In the aeration tank 2 of the present application, there are microorganisms that can nitrify the urea wastewater, so that the urea wastewater can be preliminarily denitrified. In order to increase the denitrification efficiency of the aeration tank 2, the power device 14 arranged in the present application can drive the swing rod 10 to swing back and forth in the aeration tank 2, and then the aeration pipe 13 and other related components can be synchronously reciprocated in the aeration tank 2. The reciprocating swing of the aeration pipe 13 will greatly increase the effective range of its aeration, and then the denitrification efficiency of the microorganisms in the aeration tank 2 can be improved, and the aeration pipe 13 can mechanically stir the wastewater during the reciprocating swing, further increasing the contact effect between the wastewater and the microorganisms, thereby ensuring its production efficiency. The wastewater after preliminary denitrification in the aeration tank 2 is transported to the denitrification tower 4 and the adsorption tower 5 in turn via the first delivery pump 3 and the second delivery pump 24 for further denitrification treatment. The treated wastewater has a low ammonia nitrogen content and can be transported to the collection barrel 7 for storage so that it can be transported to the urea production line through the recovery pipe 22 for recycling and utilization, thereby avoiding waste of water resources.

[0019] Embodiment 2, on the basis of embodiment 1, a longitudinal axis 9 is fixedly connected between the two support plates 8, and a power device 14 for driving the swing rod 10 to swing back and forth is arranged on the longitudinal axis 9. Under the drive of the power device 14, the aeration pipe 13 will swing back and forth synchronously, so as to increase the effective aeration range of the aeration pipe 13 during the aeration process, thereby improving the denitrification efficiency of the aeration tank 2. And the swinging aeration pipe 13 can also stir the wastewater, further improving the denitrification efficiency. When the power device 14 is working: the motor 16 on the support seat 15 drives the driving rod 18 to rotate in a circle through its output shaft 17, and then the insertion rod 19 will rotate synchronously and move relative to the driving groove 20. Under the cooperation of the insertion rod 19 and the driving groove 20, the swing rod 10 will swing back and forth around the longitudinal axis 9, and then the mounting frame 11 fixedly connected to the swing rod 10, and the aeration pipe 13 fixedly connected to the mounting frame 11 through the clamp 12 will swing back and forth synchronously.

[0020] Embodiment 3, on the basis of embodiment 2, the denitrification tower 4 and the adsorption tower 5 can use the existing technology process for the ammonia nitrogen treatment of the wastewater, and this application will not describe it in detail. In this application, after the urea wastewater is preliminarily denitrified in the aeration tank 2, each delivery valve 21 is opened and the first delivery pump 3 and the second delivery pump 24 are started. Under the action of the first delivery pump 3, the wastewater enters the denitrification tower 4 to further remove the ammonia nitrogen component therein, and then enters the adsorption tower 5 under the action of the second delivery pump 24 to further remove the ammonia nitrogen. At this time, the ammonia nitrogen content in the wastewater is low, and it can be sent to the collection cylinder through the collection pipe 6 for storage, and the recovery valve 23 can be opened to send the treated wastewater stored in the collection barrel 7 to the urea production line in the factory through the recovery pipe 22 for utilization.

Claims

1. A urea wastewater recovery device, comprising a liquid inlet pipe (1) and an aeration tank (2) corresponding to the outlet end of the liquid inlet pipe (1), wherein the outlet end of the aeration tank (2) is fixedly connected to the inlet end of a first delivery pump (3), the outlet end of the first delivery pump (3) is fixedly connected to the inlet end of a denitrification tower (4), the outlet end of the denitrification tower (4) is fixedly connected to the inlet end of a second delivery pump (24), and the outlet end of the second delivery pump (24) is fixedly connected to the inlet end of an adsorption tower (5), characterized in that: The outlet end of the adsorption tower (5) is fixedly connected to the inlet end of the collection pipe (6), and a collection bucket (7) is arranged corresponding to the outlet end of the collection pipe (6). The upper end of the aeration tank (2) is fixedly connected to two support plates (8) that are arranged in a front-to-rear manner, and the opposite ends of the two support plates (8) are fixedly connected to a longitudinal axis (9). A swing rod (10) is rotatably connected to the middle of the longitudinal axis (9), and a mounting frame (11) is fixedly connected to the lower end of the swing rod (10). The mounting frame (11) is uniformly and integrally provided with clamps (12) in a lateral direction, and each of the clamps (12) is coaxially fixedly connected to an aeration pipe (13). The longitudinal axis (9) is fixedly connected to a power device (14) for driving the swing rod (10) to swing back and forth.

2. A urea wastewater recovery device according to claim 1, characterized in that: The power device (14) comprises a support seat (15) fixedly connected to the longitudinal axis (9), the support seat (15) being fixedly connected to a motor (16), the output shaft (17) of the motor (16) being fixedly connected to one end of a driving rod (18), the other end of the driving rod (18) being fixedly connected to one end of an insertion rod (19), and the swing arm (10) being provided with a driving groove (20) corresponding to the insertion rod (19).

3. A urea wastewater recovery device according to claim 1, characterized in that: Delivery valves (21) are respectively installed at the inlet ends of the first delivery pump (3) and the second delivery pump (24).

4. The urea wastewater recovery device according to claim 1, characterized in that: The bottom of the collection barrel (7) is fixedly connected to a recovery pipe (22), and a recovery valve (23) is installed on the recovery pipe (22).

Images