Rear denitrification device

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to a rear denitrification device which comprises a rod barrel, a piston is slidably mounted in the rod barrel, a connecting rod is mounted on the bottom side of the piston, a connecting plate is fixedly connected to one end of the connecting rod, a limiting ring is slidably mounted on the outer wall of the rod barrel, an electrode is mounted on the outer wall of the limiting ring, and the connecting plate is fixedly connected to the outer wall of the rod barrel. One side of the connecting plate is fixedly connected with a connecting rod, one end of the connecting rod is provided with an electric sheet, and the other end of the rod cylinder is provided with a carbon source inlet and outlet assembly; the air cylinder and the feeding valve are opened, the air cylinder drives the actuating rod to extend, then the connecting rod and the piston are driven to slide in the rod barrel, the carbon source is pumped into the rod barrel, and when the electrode makes contact with the electric sheet, the control panel closes the feeding valve, opens the electromagnetic valve and controls the air cylinder to work reversely, so that the carbon source in the rod barrel enters the output pipe; and the carbon source is sprayed into the reaction tank through the spray head, so that nitrate in water is removed, the feeding amount of the carbon source is controlled, and the denitrification effect can be improved.

Description

Technical Field

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

[0002] Post-denitrification is a biological denitrification process, usually used for deep denitrification or to treat wastewater with significantly low organic matter content.

[0003] A Chinese patent with announcement number CN215905932U discloses a post-denitrification device, including a water distribution main pipe for connecting with a water inlet pipe; a plurality of water distribution branches connected to the pipe body of the water distribution main pipe, and water outlet holes are opened on the water distribution branches. According to the hydraulic flow simulation, the aperture and spacing of the water outlet holes are optimized. The utility model has the advantages of being able to achieve a steady and uniform rise in the water level in the nitrification tank and reducing the impact of the water flow on the formed biofilm.

[0004] However, the above-mentioned post-denitrification device still has some problems. In practical applications, in order to provide the organic matter required by the denitrifying bacteria, a carbon source is usually added to the reactor to remove nitrate and nitrite in the water. However, in the prior art, it is not easy to control the amount of carbon source added. When the carbon source is insufficient, the denitrifying bacteria cannot obtain enough organic matter for denitrification, thereby affecting the denitrification effect. Therefore, a post-denitrification device is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve the problems raised in the background technology, the utility model proposes a post-denitrification device.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a post-denitrification device described in the utility model comprises a reaction tank, a fixed plate is installed on one side of the reaction tank, a rod barrel is fixedly installed on the bottom side of the fixed plate, a piston is slidably installed inside the rod barrel, a connecting rod is fixedly installed on the bottom side of the piston, one end of the connecting rod slides through the bottom side of the rod barrel and is fixedly connected to the connecting plate, a cylinder is installed on the other end of the bottom side of the fixed plate, an acting rod is fixedly installed on the acting end of the cylinder, one end of the acting rod is fixed to the top side of the connecting plate, a limiting ring is slidably installed on the outer wall of the rod barrel, a locking screw is rotatably installed inside the limiting ring, an electrode is installed on the outer wall of the limiting ring, a connecting rod is fixedly connected to one side of the connecting plate, one end of the connecting rod extends between the fixed plate and the limiting ring and is installed with an electric sheet, and a carbon source inlet and outlet assembly is installed on the other end of the rod barrel, so as to control the feed amount of the carbon source, thereby improving the denitrification effect.

[0007] Preferably, the carbon source inlet and outlet assembly includes an output pipe, one end of the output pipe is connected to the rod barrel, a solenoid valve is installed on the outer wall of the output pipe, two nozzles are equidistantly installed on the outer wall of the other end of the output pipe, one end of the nozzle extends to the interior of the reaction tank, one side of the output pipe is connected to a feed pipe, a feed valve is installed on the outer wall of the feed pipe, and one end of the feed pipe is connected to the carbon source storage box to facilitate the control of the inlet and outlet of the nitrogen source.

[0008] Preferably, a water inlet is installed on the top side of the reaction tank, and an outlet pipe is connected to the interior of the reaction tank. One end of the outlet pipe extends to the outside of the reaction tank and is installed with a pump. One end of the outlet pipe is connected to an external sedimentation tank to facilitate the control of the inflow and outflow of wastewater.

[0009] Preferably, two rotating shafts are symmetrically installed inside the reaction tank, and three groups of three support rods are equidistantly installed on the outer wall of the rotating shaft. One end of the support rod is fixedly connected with a stirring plate to ensure sufficient contact between the carbon source and the microorganisms, thereby accelerating the efficiency of wastewater treatment.

[0010] Preferably, one end of the rotating shaft passes through the outside of the reaction tank and is respectively equipped with a driving wheel and a driven wheel, the driving wheel and the driven wheel are connected by a belt drive, an L-shaped plate is installed on one side of the reaction tank, and a driving motor is assembled inside the L-shaped plate, wherein one end of the rotating shaft on which the driving wheel is installed is connected with the output end of the driving motor, so as to provide stable power output to the stirring assembly.

[0011] Preferably, support legs are fixedly installed at the four corners of the bottom side of the reaction tank, and a control panel is installed on one side of the reaction tank. The control panel is electrically connected to the electrodes and the electric sheet as well as the cylinder and the solenoid valve and the feed valve, and is used for signal transmission to the electrodes and the electric sheet, and for operation control of the cylinder and the solenoid valve and the feed valve, thereby improving the accuracy of carbon source addition.

[0012] The utility model is beneficial in that:

[0013] 1. The utility model opens the cylinder and the feed valve, and the action end of the cylinder drives the action rod to extend, thereby driving the connecting rod and the piston to slide in the rod barrel, and the carbon source is drawn into the interior of the rod barrel. When the electrode and the electrode are in contact, the control panel controls the feed valve to close, opens the solenoid valve, and controls the cylinder to work in reverse, so that the carbon source inside the rod barrel enters the output pipe, enters the nozzle from the output pipe, and is sprayed into the reaction tank, thereby removing nitrates in the water, realizing the control of the feed amount of the carbon source, thereby improving the denitrification effect;

[0014] 2. When the driving motor of the utility model is running, its output end will drive the rotating shaft to rotate, and the driving wheel will also rotate accordingly. The rotation of the driving wheel will be transmitted to the driven wheel through the belt. The rotation of the driven wheel will drive the rotating shaft and the support rod and the stirring blade thereon to rotate together. Therefore, the two rotating shafts and the stirring blade will rotate at the same time. The rotation of the stirring blade can fully mix the water to be treated and the carbon source, provide better reaction conditions, and promote the denitrification. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 This is a schematic diagram of the main structure of the denitrification device in the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the control component for adding the amount of carbon source;

[0018] Figure 3 It is a schematic diagram of the structure of the stirring component inside the reaction tank;

[0019] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A.

[0020] In the figure: 1. support leg; 2. reaction tank; 3. fixing plate; 4. rod barrel; 5. piston; 6. connecting rod; 7. connecting plate; 8. cylinder; 9. action rod; 10. limit ring; 11. locking screw; 12. electrode; 13. connecting rod; 14. electric sheet; 15. output pipe; 16. solenoid valve; 17. nozzle; 18. feed pipe; 19. feed valve; 20. water inlet; 21. water outlet pipe; 22. pump; 23. rotating shaft; 24. support rod; 25. stirring blade; 26. driving wheel; 27. driven wheel; 28. belt; 29. ​​L-shaped plate; 30. driving motor; 31. control panel. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-2 As shown, a post-denitrification device comprises a reaction tank 2, a fixed plate 3 is installed on one side of the reaction tank 2, a rod barrel 4 is fixedly installed on the bottom side of the fixed plate 3, a piston 5 is slidably installed inside the rod barrel 4, a connecting rod 6 is fixedly installed on the bottom side of the piston 5, one end of the connecting rod 6 slides through the bottom side of the rod barrel 4 and is fixedly connected to a connecting plate 7, a cylinder 8 is installed on the other end of the bottom side of the fixed plate 3, an acting rod 9 is fixedly installed on the acting end of the cylinder 8, one end of the acting rod 9 is fixed on the top side of the connecting plate 7, a limiting ring 10 is slidably installed on the outer wall of the rod barrel 4, a locking screw 11 is rotatably installed inside the limiting ring 10, an electrode 12 is installed on the outer wall of the limiting ring 10, a connecting rod 13 is fixedly connected to one side of the connecting plate 7, one end of the connecting rod 13 extends between the fixed plate 3 and the limiting ring 10 and is installed with an electric sheet 14, and a carbon source inlet and outlet assembly is installed on the other end of the rod barrel 4;

[0023] The carbon source inlet and outlet assembly includes an output pipe 15, one end of which is connected to the rod barrel 4, a solenoid valve 16 is installed on the outer wall of the output pipe 15, two nozzles 17 are installed equidistantly on the outer wall of the other end of the output pipe 15, one end of the nozzle 17 extends to the interior of the reaction tank 2, one side of the output pipe 15 is connected to a feed pipe 18, a feed valve 19 is installed on the outer wall of the feed pipe 18, and one end of the feed pipe 18 is connected to the carbon source storage box;

[0024] Support legs 1 are fixedly installed at the four corners of the bottom side of the reaction tank 2, and a control panel 31 is installed on one side of the reaction tank 2. The control panel 31 is electrically connected to the electrode 12 and the electric sheet 14, as well as the cylinder 8 and the solenoid valve 16 and the feed valve 19, and is used for signal transmission to the electrode 12 and the electric sheet 14, and for operating and controlling the cylinder 8 and the solenoid valve 16 and the feed valve 19. During operation, in actual applications, in order to provide the organic matter required by the denitrifying bacteria, a carbon source is usually added to the reactor to remove nitrates and nitrites in the water. However, in the prior art, it is not easy to control the amount of carbon source added. When the carbon source is not added enough, the denitrifying bacteria cannot obtain enough organic matter for denitrification, thereby affecting the denitrification effect. First, according to the amount of carbon source to be added, the locking screw 11 is used to cooperate with the limiting ring 10 to move to the rod barrel 4 The electrode 12 is placed at a suitable position on the electrode 12, and the distance between the electrode 12 and the electric sheet 14 is equal to the amount of carbon source added, wherein the carbon source can be methanol. The cylinder 8 and the feed valve 19 are opened through the control panel 31, and the action end of the cylinder 8 drives the action rod 9 to extend, thereby driving the connecting rod 6 and the piston 5 to slide in the rod barrel 4, and the carbon source is drawn into the interior of the rod barrel 4. When the electrode 12 and the electric sheet 14 are in contact, the signal is transmitted to the control panel 31, and the control panel 31 controls the feed valve 19 to close, opens the solenoid valve 16, and controls the cylinder 8 to work in reverse, so that the action end of the cylinder 8 drives the action rod 9 to shorten, and the sliding of the piston 5 changes the pressure in the rod barrel 4, so that the carbon source inside the rod barrel 4 enters the output pipe 15, enters the nozzle 17 from the output pipe 15, and is sprayed into the reaction tank 2, thereby removing nitrates in the water, realizing the control of the feed amount of the carbon source, thereby improving the denitrification effect.

[0025] See also Figure 1 , 3 As shown, a water inlet 20 is installed on the top side of the reaction tank 2, and a water outlet pipe 21 is connected to the interior of the reaction tank 2. One end of the water outlet pipe 21 extends to the outside of the reaction tank 2 and is installed with a pump 22. One end of the water outlet pipe 21 is connected to an external sedimentation tank. When working, post-denitrification is a biological denitrification process, which is usually used for deep denitrification or treatment of wastewater with a significantly low organic matter content. The wastewater to be treated is introduced into the reaction tank 2 through the water inlet 20. After the carbon source is added, in the reaction tank 2, the denitrifying bacteria use the carbon source to carry out a denitrification reaction to reduce nitrates to nitrogen gas. The pump 22 is used to provide power to pump the treated water out of the reaction tank 2 through the water outlet pipe 21. The treated water is transported to the external sedimentation tank through the water outlet pipe 21 by the pump 22 for precipitation treatment to remove residual solid particles and other pollutants.

[0026] See also Figure 3-4As shown, two rotating shafts 23 are symmetrically installed inside the reaction pool 2, and three groups of three support rods 24 are evenly installed on the outer wall of the rotating shaft 23, and one end of each support rod 24 is fixedly connected with a stirring blade 25;

[0027] One end of the rotating shaft 23 passes through the outside of the reaction tank 2 and is respectively installed with a driving wheel 26 and a driven wheel 27, and the driving wheel 26 and the driven wheel 27 are connected by a belt 28. An L-shaped plate 29 is installed on one side of the reaction tank 2, and a driving motor 30 is installed inside the L-shaped plate 29, wherein one end of the rotating shaft 23 on which the driving wheel 26 is installed is connected with the output end of the driving motor 30; when working, in order to ensure that there is sufficient contact between the carbon source and the microorganisms and to speed up the efficiency of wastewater treatment, when the driving motor 30 is running When the output end of the stirring blade 25 rotates, the output end of the stirring blade 25 drives the rotating shaft 23 to rotate, and the driving wheel 26 also rotates accordingly. The rotation of the driving wheel 26 is transmitted to the driven wheel 27 through the belt 28, so that the driven wheel 27 also starts to rotate. The rotation of the driven wheel 27 drives the rotating shaft 23 and the support rod 24 and the stirring blade 25 thereon to rotate together. Therefore, the two rotating shafts 23 and the stirring blade 25 rotate at the same time to stir the reaction tank 2. The rotation of the stirring blade 25 can fully mix the water to be treated and the carbon source, provide better reaction conditions, and promote the denitrification.

[0028] Working principle: the wastewater to be treated is introduced into the reaction tank 2 through the water inlet 20. First, according to the amount of carbon source to be added, the limit ring 10 is moved to the appropriate position on the rod barrel 4 through the locking screw 11. The distance between the electrode 12 and the electrode 14 is equal to the amount of carbon source added, wherein the carbon source can be methanol. The cylinder 8 and the feed valve 19 are opened through the control panel 31. The action end of the cylinder 8 drives the action rod 9 to extend, thereby driving the connecting rod 6 and the piston 5 to slide in the rod barrel 4, and the carbon source is drawn into the interior of the rod barrel 4. When the electrode 12 is opened, the distance between the electrode 12 and the electrode 14 is equal to the amount of carbon source added. The carbon source can be methanol. When the electrode 12 and the electric sheet 14 are in contact, a signal is transmitted to the control panel 31. The control panel 31 controls the feed valve 19 to close, opens the solenoid valve 16, and controls the cylinder 8 to work in reverse, so that the action end of the cylinder 8 drives the action rod 9 to shorten, and the sliding of the piston 5 changes the pressure in the rod barrel 4, so that the carbon source inside the rod barrel 4 enters the output pipe 15, enters the nozzle 17 from the output pipe 15, and is sprayed into the reaction tank 2, thereby removing nitrates in the water, realizing the control of the feed amount of the carbon source, thereby improving the denitrification effect;

[0029] After the carbon source is added, in the reaction tank 2, the denitrifying bacteria use the carbon source to perform a denitrification reaction to reduce nitrate to nitrogen gas. The pump 22 is used to provide power to pump the treated water out of the reaction tank 2 through the outlet pipe 21. The treated water is transported by the pump 22 through the outlet pipe 21 to the external sedimentation tank for sedimentation treatment to remove residual solid particles and other pollutants.

[0030] During the denitrification operation, when the driving motor 30 is running, its output end will drive the rotating shaft 23 to rotate, and the driving wheel 26 will also rotate accordingly. The rotation of the driving wheel 26 will be transmitted to the driven wheel 27 through the belt 28, so that the driven wheel 27 also starts to rotate. The rotation of the driven wheel 27 will drive the rotating shaft 23 and the support rod 24 and the stirring blade 25 thereon to rotate together. Therefore, the two rotating shafts 23 and the stirring blade 25 will rotate at the same time, stirring in the reaction tank 2. The rotation of the stirring blade 25 can fully mix the water to be treated and the carbon source, provide better reaction conditions, and promote the denitrification.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A post-denitrification device, characterized in that: The invention comprises a reaction pool (2), a fixing plate (3) is installed on one side of the reaction pool (2), a rod barrel (4) is fixedly installed on the bottom side of the fixing plate (3), a piston (5) is slidably installed inside the rod barrel (4), a connecting rod (6) is fixedly installed on the bottom side of the piston (5), one end of the connecting rod (6) slides through the bottom side of the rod barrel (4) and is fixedly connected to a connecting plate (7), a cylinder (8) is installed on the other end of the bottom side of the fixing plate (3), an acting rod (9) is fixedly installed on the acting end of the cylinder (8), and the One end of the action rod (9) is fixed to the top side of the connecting plate (7), a limit ring (10) is slidably installed on the outer wall of the rod barrel (4), a locking screw (11) is rotatably installed inside the limit ring (10), an electrode (12) is installed on the outer wall of the limit ring (10), a connecting rod (13) is fixedly connected to one side of the connecting plate (7), one end of the connecting rod (13) extends between the fixed plate (3) and the limit ring (10) and is installed with an electric sheet (14), and the other end of the rod barrel (4) is installed with a carbon source inlet and outlet assembly.

2. A post-denitrification device according to claim 1, characterized in that: The carbon source inlet and outlet assembly comprises an output pipe (15), one end of which is connected to the rod barrel (4), an electromagnetic valve (16) is installed on the outer wall of the output pipe (15), two nozzles (17) are installed at equal distances on the outer wall of the other end of the output pipe (15), one end of the nozzle (17) extends to the interior of the reaction tank (2), one side of the output pipe (15) is connected to a feed pipe (18), a feed valve (19) is installed on the outer wall of the feed pipe (18), and one end of the feed pipe (18) is connected to a carbon source storage box.

3. A post-denitrification device according to claim 2, characterized in that: A water inlet (20) is installed on the top side of the reaction tank (2), and a water outlet pipe (21) is connected to the interior of the reaction tank (2). One end of the water outlet pipe (21) extends to the outside of the reaction tank (2) and is installed with a pump (22). One end of the water outlet pipe (21) is connected to an external sedimentation tank.

4. A post-denitrification device according to claim 3, characterized in that: Two rotating shafts (23) are symmetrically installed inside the reaction pool (2), and three groups of three support rods (24) are equidistantly installed on the outer wall of the rotating shaft (23), and one end of each support rod (24) is fixedly connected to a stirring blade (25).

5. A post-denitrification device according to claim 4, characterized in that: One end of the rotating shaft (23) passes through the outside of the reaction pool (2) and is respectively installed with a driving wheel (26) and a driven wheel (27), and the driving wheel (26) and the driven wheel (27) are connected to each other by a belt (28). An L-shaped plate (29) is installed on one side of the reaction pool (2), and a driving motor (30) is installed inside the L-shaped plate (29), wherein one end of the rotating shaft (23) on which the driving wheel (26) is installed is connected to the output end of the driving motor (30).

6. A post-denitrification device according to claim 5, characterized in that: Support legs (1) are fixedly installed at the four corners of the bottom side of the reaction pool (2), and a control panel (31) is installed on one side of the reaction pool (2). The control panel (31) is electrically connected to the electrode (12) and the electric sheet (14) as well as the cylinder (8) and the solenoid valve (16) and the feed valve (19), and is used for signal transmission of the electrode (12) and the electric sheet (14), and for operating and controlling the cylinder (8) and the solenoid valve (16) and the feed valve (19).

Images