Denitrification treatment device for high-ammonia-nitrogen wastewater

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a denitrification treatment device for high ammonia-nitrogen wastewater, which comprises an aeration tank and an aeration pipeline laid at the bottom of the aeration tank, the aeration pipeline is connected with an aerator through an air supply pipe, and a pretreatment mechanism is arranged on one side of the aeration tank. According to the utility model, the pretreatment mechanism is arranged on one side of the aeration tank, when high-ammonia-nitrogen wastewater is treated, the pretreatment mechanism firstly adds a treating agent into the wastewater and uniformly stirs the treating agent, so that the treating agent is fully mixed with the wastewater, and the addition of the treating agent (such as nitrifying bacteria and the like) can increase the activity and quantity of the nitrifying bacteria and promote the conversion of ammonia nitrogen; the stirring can improve the transmission and reaction rate of oxygen, and when the pretreated wastewater is discharged into the aeration tank for aeration, the oxygen demand can be reduced, so that the load of the aeration tank is reduced, and the efficiency of the aeration denitrification process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a denitrification treatment device for high-ammonia nitrogen wastewater. Background Art

[0002] Ammonia nitrogen in ammonia nitrogen wastewater is an important substance for eutrophication of water bodies and environmental pollution. It can easily cause algae and other microorganisms to multiply in large numbers in the water, leading to difficulties in the operation of tap water treatment plants and causing odor in drinking water. In severe cases, it can cause a series of hazards such as a decrease in dissolved oxygen in the water and the death of large numbers of fish. Therefore, denitrification treatment is required before discharging ammonia nitrogen wastewater.

[0003] Aeration, aerobic-anaerobic, chemical denitrification, membrane separation, etc. are often used to treat ammonia nitrogen wastewater. The aeration mechanism is to introduce oxygen into the wastewater, and the oxygen reacts with the ammonia nitrogen in the wastewater to convert it into nitrite and nitrate. However, when treating a large amount of high ammonia nitrogen wastewater, because the oxidation process of ammonia nitrogen requires a large amount of oxygen, due to the high ammonia nitrogen concentration, the aeration tank needs to provide more oxygen to meet the requirements of the oxidation reaction, which will cause the aeration equipment to require greater energy and higher operating costs, resulting in increased costs.

[0004] Therefore, we proposed a denitrification treatment device for high ammonia nitrogen wastewater in order to solve the problems raised above. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art in the above-mentioned background technology, the purpose of the utility model is to provide a denitrification treatment device for high-ammonia nitrogen wastewater to solve the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A denitrification treatment device for high-ammonia nitrogen wastewater comprises an aeration tank and an aeration pipeline laid at the bottom of the aeration tank, wherein the aeration pipeline is connected to an aerator through an air supply pipe, and a pretreatment mechanism is arranged on one side of the aeration tank;

[0010] The pretreatment mechanism comprises a treatment pool, a mounting plate frame is fixed on the top of the treatment pool, a lower barrel is rotatably mounted on the mounting plate frame, the top of the lower barrel is connected to a feed pipe for conveying the treatment agent, the bottom of the lower barrel extends to the inside of the treatment pool and is connected to a plurality of shunt pipes, a diverging barrel is arranged at one end of the shunt pipe away from the lower barrel, and a plurality of diverging holes are opened on the diverging barrel;

[0011] The treatment tank is connected to the aeration tank via a connecting pipe, and a control valve is provided on the connecting pipe;

[0012] The mounting plate frame is provided with a driving mechanism for driving the lower barrel to rotate.

[0013] Furthermore, the driving mechanism includes a driving motor fixed on the mounting plate frame, a first bevel gear is arranged on the rotating shaft of the driving motor, and a second bevel gear meshing with the first bevel gear is fixed on the discharge barrel.

[0014] Furthermore, a secondary stirring mechanism is provided on the outside of the lower barrel, and the secondary stirring mechanism includes a rotating sleeve fixed on the upper outside of the lower barrel and rotatably connected to the mounting plate frame, and a third bevel gear fixed on the rotating sleeve and meshing with the first bevel gear. A stirring rod is provided at the bottom of the side wall of the rotating sleeve.

[0015] Furthermore, the third bevel gear and the second bevel gear are arranged symmetrically in an upper and lower direction.

[0016] Preferably, the diverging cylinder is arranged in parallel with the feeding cylinder, and the stirring rod is an L-shaped folded plate, and its vertical section is parallel to the diverging cylinder.

[0017] Preferably, a plurality of extension tubes are equidistantly arranged on the side wall of the diverging tube along its axial direction, and a plurality of extension plates staggered with the plurality of extension tubes are fixed on the side wall of the diverging tube.

[0018] Preferably, a stabilizing rod is provided at the top of the diverging tube, and one end of the stabilizing rod away from the diverging tube is fixed to the side wall of the lower barrel.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] By setting a pretreatment mechanism on one side of the aeration tank, when treating high ammonia nitrogen wastewater, the pretreatment mechanism first adds treatment agent to the wastewater and stirs it evenly to make it fully mixed with the wastewater. The addition of treatment agent (such as nitrifying bacteria, etc.) can increase the activity and number of nitrifying bacteria and promote the conversion of ammonia nitrogen. Stirring can increase the transfer of oxygen and the reaction rate. When the pretreated wastewater is discharged into the aeration tank for aeration, the oxygen demand can be reduced to reduce the load of the aeration tank and improve the efficiency of the aeration denitrification process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view structural schematic diagram of the denitrification treatment device for high ammonia nitrogen wastewater of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the pretreatment mechanism of the denitrification treatment device for high-ammonia nitrogen wastewater of the utility model;

[0024] Figure 3 This is a schematic diagram of the top view of the aeration tank structure of the denitrification treatment device for high-ammonia nitrogen wastewater of the utility model.

[0025] In the figure: aeration tank 1, aeration pipe 2, aerator 3, pretreatment mechanism 4, treatment tank 41, mounting plate frame 42, discharge barrel 43, diversion pipe 44, diverging barrel 45, diverging hole 46, extension barrel 47, stabilizing rod 48, driving mechanism 5, driving motor 51, first bevel gear 52, second bevel gear 53, connecting pipe 6, secondary stirring mechanism 7, rotating sleeve 71, third bevel gear 72, stirring rod 73, extension plate 74, feeding pipe 8, control valve 9. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-3 As shown, the utility model provides a denitrification treatment device for high-ammonia nitrogen wastewater, including an aeration tank 1, an aeration pipe 2, an aerator 3 and a pretreatment mechanism 4. The aeration pipe 2 is laid at the bottom of the aeration tank 1, and the aeration pipe 2 is connected to the aerator 3 through an air supply pipe. The pretreatment mechanism 4 is provided on one side of the aeration tank 1. Figure 3 As shown, the aeration pipe 2 may be distributed in a mesh structure with aeration holes opened thereon to make the air supply distribution more uniform. The wastewater treated by the pretreatment mechanism 4 is then discharged into the aeration tank 1 for aeration, and the aerator 3 supplies oxygen into the aeration tank 1 through the aeration pipe 2.

[0028] like Figure 2As shown, the pretreatment mechanism 4 includes a treatment tank 41, a mounting plate frame 42, a discharge barrel 43, a diverter pipe 44 and a diverging barrel 45. The mounting plate frame 42 can be fixed to the top of the treatment tank 41 by bolts or the like, and its bottom is connected to the aeration tank 1 through a connecting pipe 6. A control valve 9 is provided on the connecting pipe 6. The mounting plate frame 42 can span the top of the treatment tank 41. The top of the treatment tank 41 is an open structure. A discharge barrel 43 is rotatably mounted on the mounting plate frame 42. The top of the discharge barrel 43 is connected to a feed pipe 8 for conveying a treatment agent. The bottom of the discharge barrel 43 extends to the inside of the treatment tank 41 and is connected to a plurality of diverter pipes 44 extending radially and distributed circumferentially thereof. A diverging barrel 45 is provided at one end of the diverter pipe 44 away from the discharge barrel 43, and a plurality of diverging holes 46 are opened on the diverging barrel 45.

[0029] A driving mechanism 5 for driving the unloading barrel 43 to rotate is arranged on the mounting plate frame 42 , and the driving mechanism 5 includes a driving motor 51 fixed on the mounting plate frame 42 , a first bevel gear 52 is arranged on the rotating shaft of the driving motor 51 , and a second bevel gear 53 meshing with the first bevel gear 52 is fixed on the unloading barrel 43 .

[0030] The driving motor 51 drives the feed pipe 43 to rotate through the meshing of the first bevel gear 52 and the second bevel gear 53. When pre-treating high-ammonia nitrogen wastewater, the treatment agent is sent to the feed pipe 43 through the feed pipe. When the feed pipe 43 rotates, the treatment agent is sent to the diverging tube 45 through the shunt pipe 44. Then, the diverging hole 46 on the diverging tube 45 throws the treatment agent out to contact with the wastewater. The treatment agent can be nitrifying bacteria powder, which is used to increase the number and activity of nitrifying bacteria in the wastewater. At the same time, the diverging tube 45 stirs and mixes the treatment agent and the wastewater when the rod is rotated, so as to increase the transfer and reaction rate of oxygen and promote the nitrification reaction. The pre-treated wastewater is discharged from the connecting pipe 6 to the aeration tank for aeration, which can reduce the oxygen demand, reduce the load of the aeration tank, and improve the efficiency of the aeration denitrification process.

[0031] As a preferred technical solution of the present utility model: a secondary stirring mechanism 7 is arranged on the outer side of the lower barrel 43, and the secondary stirring mechanism 7 includes a rotating sleeve 71 fixed on the upper outer side of the lower barrel 43 and rotatably connected to the mounting plate frame 42, and a third bevel gear 72 fixed on the rotating sleeve 71 and meshing with the first bevel gear 52, which is symmetrically arranged with the second bevel gear 53 in the upper and lower directions. A stirring rod 73 is arranged on the bottom of the side wall of the rotating sleeve 71, and the divergent barrel 45 is arranged parallel to the lower barrel 43. The stirring rod 73 is an L-shaped folding plate, and its vertical section is parallel to the divergent barrel 45. When the driving motor 51 drives the lower barrel 43 to rotate, it drives the rotating sleeve 71 and the stirring rod 73 to rotate through the third bevel gear 72. When the stirring rod 73 rotates, it has an enhanced stirring and mixing effect on the treatment agent and the wastewater. Moreover, since the third bevel gear 72 and the second bevel gear 53 are symmetrically arranged in the upper and lower directions, the mixing efficiency can be further improved.

[0032] As a preferred technical solution of the utility model: a plurality of extension tubes 47 are equidistantly arranged on the side wall of the divergent tube 45 along its axial direction, and a plurality of extension plates 74 staggered with the plurality of extension tubes 47 are fixed on the side wall of the divergent tube 45. The extension tubes 47 can increase the spraying range of the agent to make the spraying coverage wider. At the same time, the staggered extension plates 74 and extension tubes 47 can further improve the stirring effect. The extension tubes 47 on the same vertical line are a group, and multiple groups can be arranged at equal angles along the circumference of the divergent tube 45, and the same applies to the extension plates 74.

[0033] As a preferred technical solution of the utility model: a stabilizing rod 48 is arranged on the top of the diverging tube 45, and one end of the stabilizing rod 48 away from the diverging tube 45 is fixed to the side wall of the discharge tube 43. The arrangement of the stabilizing rod 48 can improve the stability of the diverging tube 45 when rotating.

[0034] As a preferred technical solution of the utility model: the feed barrel 43, the diverter pipe 44, the diverging barrel 45, the diverging hole 46, the extension barrel 47, the stabilizing rod 48, the stirring rod 73 and the extension plate 74 are all made of stainless steel, so that they have good rigidity and corrosion resistance and a long service life.

[0035] The electrical components mentioned in this article can be electrically connected to an external controller, and the controller can be electrically connected to an external 220V mains power supply, and the controller can be a conventional known device such as a computer that performs control.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be noted that, in the present invention, unless otherwise clearly specified and limited, the terms such as “set”, “install”, “connected”, “connected”, “fixed”, etc. should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can also be indirectly connected through an intermediate medium.

[0037] In the description of the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this article, the meaning of "plurality" is two or more, unless otherwise clearly and specifically limited.

[0038] For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances; for technicians in this field, they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A denitrification treatment device for high-ammonia nitrogen wastewater, comprising an aeration tank (1) and an aeration pipe (2) laid at the bottom of the aeration tank (1), wherein the aeration pipe (2) is connected to an aerator (3) through an air supply pipe, and is characterized in that: A pretreatment mechanism (4) is provided on one side of the aeration tank (1); The pretreatment mechanism (4) comprises a treatment pool (41), a mounting plate frame (42) is fixed on the top of the treatment pool (41), a lower barrel (43) is rotatably mounted on the mounting plate frame (42), the top of the lower barrel (43) is connected to a feeding pipe (8) for conveying a treatment agent, the bottom of the lower barrel (43) extends into the treatment pool (41) and is connected to a plurality of shunt pipes (44), a diverging barrel (45) is provided at one end of the shunt pipe (44) away from the lower barrel (43), and a plurality of diverging holes (46) are opened on the diverging barrel (45); The treatment tank (41) is connected to the aeration tank (1) via a connecting pipe (6), and a control valve (9) is provided on the connecting pipe (6); The mounting plate frame (42) is provided with a driving mechanism (5) for driving the unloading barrel (43) to rotate.

2. A denitrification treatment device for high-ammonia nitrogen wastewater according to claim 1, characterized in that: The driving mechanism (5) comprises a driving motor (51) fixed on a mounting plate frame (42), a first bevel gear (52) being arranged on a rotating shaft of the driving motor (51), and a second bevel gear (53) meshing with the first bevel gear (52) being fixed on the unloading barrel (43).

3. A denitrification treatment device for high-ammonia nitrogen wastewater according to claim 2, characterized in that: A secondary stirring mechanism (7) is arranged outside the lower material barrel (43), and the secondary stirring mechanism (7) comprises a rotating sleeve (71) fixed above the outer side of the lower material barrel (43) and rotatably connected to the mounting plate frame (42), and a third bevel gear (72) fixed on the rotating sleeve (71) and meshing with the first bevel gear (52), and a stirring rod (73) is arranged at the bottom of the side wall of the rotating sleeve (71).

4. A denitrification treatment device for high-ammonia nitrogen wastewater according to claim 3, characterized in that: The third bevel gear (72) and the second bevel gear (53) are arranged in a vertically symmetrical manner.

5. A denitrification treatment device for high-ammonia nitrogen wastewater according to claim 4, characterized in that: The diverging cylinder (45) is arranged in parallel with the feeding cylinder (43), and the stirring rod (73) is an L-shaped folded plate, and its vertical section is parallel to the diverging cylinder (45).

6. A denitrification treatment device for high-ammonia nitrogen wastewater according to claim 4, characterized in that: The side wall of the diverging tube (45) is provided with a plurality of extension tubes (47) equidistantly along its axial direction, and a plurality of extension plates (74) staggered with the plurality of extension tubes (47) are fixed on the side wall of the diverging tube (45).

7. The denitrification treatment device for high-ammonia nitrogen wastewater according to claim 1, characterized in that: A stabilizing rod (48) is provided at the top of the diverging tube (45), and one end of the stabilizing rod (48) away from the diverging tube (45) is fixed to the side wall of the lower material tube (43).

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