Device for removing ammonia nitrogen from desulfurization wastewater

Abstract

The utility model provides a device for removing ammonia nitrogen from desulfurization wastewater, which relates to the technical field of desulfurization wastewater treatment and comprises a box body, a temperature sensor and a pH value detector are arranged in the box body, a water inlet pipe and a water outlet pipe are respectively arranged at two ends of the box body, a heating device is arranged on the outer surface of the box body, and the heating device is connected with the box body. The heating device comprises a heat preservation box, the heat preservation box is formed by splicing a plurality of heat preservation plates, the outer surface of the electric heating plate is fixedly connected with two heat conduction rods, and the top ends of the heat conduction rods are fixedly connected with a heat conduction frame; according to the utility model, the electric heating plate of the heating device is arranged outside the box body, so that the electric heating plate is not in direct contact with waste water, the copper heat conduction frame is used for conducting heat, so that the electric heating plate can comprehensively heat the box body, and meanwhile, the heat insulation box can avoid heat dissipation on the surface of the box body as much as possible; the heating effect of the electric heating plate is good, and the heating temperature can be more accurately controlled when the device is used.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurized wastewater treatment, in particular to a device for removing ammonia nitrogen from desulfurized wastewater. Background Art

[0002] Desulfurized wastewater is mainly the discharged water from the absorption tower during the wet desulfurization process of boiler flue gas, which contains a large amount of ammonia nitrogen. The discharge of untreated nitrogen-containing wastewater will cause great harm to the environment, such as easily leading to lake eutrophication, marine red tides, etc. The common method for removing ammonia nitrogen by chemical precipitation through chemical methods is the magnesium ammonium phosphate (MAP) method. Desulfurized wastewater is rich in Mg2+, and only appropriate phosphate needs to be supplemented to remove ammonia nitrogen in the wastewater. However, the removal rate of ammonia nitrogen by the magnesium ammonium phosphate (MAP) method is greatly affected by pH value and temperature. When the pH reaches about 8.5 and the temperature is between 25 - 30 °C, the ammonia nitrogen removal effect is the best. Existing devices cannot effectively monitor and control the pH value and temperature, resulting in poor ammonia nitrogen removal rate.

[0003] Existing technologies such as the one with the publication number CN212532610U detect and control the pH value and temperature inside the device by installing an electric heating plate, a temperature sensor, and a pH detector inside the ammonia nitrogen removal device, thereby improving the ammonia nitrogen removal efficiency.

[0004] The inventor found that when using the ammonia nitrogen removal device, the long-term contact between the internal desulfurized wastewater and the surface of the electric heating plate during the long-term use of the device will cause certain erosion to the surface of the electric heating plate, and some components in the desulfurized wastewater may adhere to and cover the surface of the electric heating plate, resulting in a deterioration of the heating efficiency and effect of the electric heating plate on the inside of the device, and the inability to accurately control the temperature inside the device, affecting the normal use of the device. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problem that the long-term contact between the internal desulfurized wastewater and the surface of the electric heating plate during the long-term use of the device will cause certain erosion to the surface of the electric heating plate, and some components in the desulfurized wastewater may adhere to and cover the surface of the electric heating plate, resulting in a deterioration of the heating efficiency and effect of the electric heating plate on the inside of the device, and the inability to accurately control the temperature inside the device, affecting the normal use of the device, and to propose a device for removing ammonia nitrogen from desulfurized wastewater.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A device for removing ammonia nitrogen from desulfurized wastewater, including a box body. A temperature sensor and a pH value detector are arranged inside the box body. An inlet pipe and an outlet pipe are respectively arranged at both ends of the box body. Electric control valves are respectively arranged inside the inlet pipe and the outlet pipe. A medicine feeding pipe is arranged at the top of the box body. A heating device capable of comprehensively and quickly heating the box body is arranged on the outer surface of the box body. An auxiliary device capable of stirring the wastewater inside the box body is arranged on the outer surface of the box body.

[0007] The effects achieved by the above components are as follows: when the desulfurization wastewater is treated for ammonia nitrogen removal, the electric control valve inside the water inlet pipe is opened through the control box on one side of the box, so that the desulfurization wastewater enters the box through the water inlet pipe, the box is heated by the heating device, and an appropriate amount of phosphate is added to the box through the dosing pipe at the top of the box. The temperature and pH value data inside the box are transmitted to the control box on one side of the box through the temperature sensor and the pH value detector for display, the ammonia nitrogen in the wastewater is removed by heating and the reaction of phosphate with the wastewater, and the electric control valve inside the outlet pipe is opened to allow the treated water to be output through the outlet pipe.

[0008] Preferably, the heating device includes an insulation box, which is formed by splicing a plurality of insulation boards, a part of the box body is integrally located inside the insulation box, the water outlet pipe runs through one side of the insulation box, two electric heating plates are arranged at the bottom end of the outer surface of the box body, two heat-conducting rods are fixedly connected to the outer surface of the electric heating plate, the outer surface of the heat-conducting rod is fixedly connected to the outer surface of the box body, the top end of the heat-conducting rod is fixedly connected to a heat-conducting frame, the heat-conducting frame is wrapped around the outer surface of the box body, and the heat-conducting rod and the heat-conducting frame are both made of metal copper.

[0009] The effects achieved by the above components are as follows: by setting up a heating device, when the wastewater entering the box is heated, the electric heating plate at the bottom of the box is operated to heat the bottom of the box, and the heat is transferred to the copper heat-conducting frame through the copper heat-conducting rod, and the box is fully heated by the heat-conducting frame. By setting the electric heating plate outside the box, the electric heating plate will not be in direct contact with the wastewater, and the copper heat-conducting frame is used for heat conduction so that the electric heating plate can fully heat the box. At the same time, the insulation box can avoid the heat dissipation on the surface of the box as much as possible, so that the heating effect of the electric heating plate is better, and the heating temperature can be controlled more accurately when using the device.

[0010] Preferably, a heat dissipation component is provided on the outer surface of the box body, and the heat dissipation component includes a copper tube, both ends of the copper tube pass through the outer surface of the insulation box, the bottom end of the copper tube is fixedly connected to the top end of the heat-conducting frame, one end of the copper tube is provided with a frame rod, one side of the frame rod is provided with a first motor, and the output end of the first motor is fixedly connected to a plurality of fan blades.

[0011] The effect achieved by the above components is: when the temperature of the box surface and the inside of the box needs to be lowered during the operation of the ammonia nitrogen removal device, the first motor can be operated to drive the fan blades to rotate and blow air into the copper tube, so that the air enters the copper tube and takes away the heat from the heat conducting rod and the box surface and outputs it through the other end of the copper tube, thereby quickly reducing the temperature of the box and improving the use efficiency of the ammonia nitrogen removal device.

[0012] Preferably, one end of the copper tube away from the frame rod is rotatably connected to a rotating block, and one side of the rotating block is fixedly connected to a blocking piece.

[0013] The effect achieved by the above components is: when the heat dissipation component is not in operation, one side of the baffle will fit onto one end of the copper tube to close the outlet of the copper tube, thereby preventing the heat inside the box from being dissipated through the copper tube as much as possible. The first motor drives the fan blades to rotate and blows air into the copper tube. When the air reaches the baffle, it will blow the baffle to cause the rotating block to rotate and open one end of the copper tube, so that the hot air can be output normally.

[0014] Preferably, the side of the baffle away from the copper tube is a hard plate made of PC material, and the end of the baffle close to the copper tube is made of high temperature resistant rubber.

[0015] The effect achieved by the above components is: by setting the side of the baffle away from the copper tube to be a hard plate made of PC material, and the end close to the copper tube to be made of high-temperature resistant rubber, the baffle can better seal the copper tube and is not easy to deform.

[0016] Preferably, the auxiliary device includes a shaft rod, both ends of which are rotatably connected to the inner wall of the box body, a second motor is provided on one side of the box body, the output end of the second motor is fixedly connected to one end of the shaft rod, and a plurality of bending plates are fixedly connected to the outer surface of the shaft rod.

[0017] The effect achieved by the above components is: by setting a bending plate, when phosphate is added to the inside of the box and the inside of the box is heated by a heating device, the second motor can be operated to drive the shaft to rotate, so that the bending plate stirs the wastewater inside the box, so that the heating device can heat the water inside the box more comprehensively, and the phosphate can react with the wastewater more fully, thereby improving the use efficiency of the device.

[0018] Preferably, both ends of the box body are respectively fixedly connected with sealing sheets, the sealing sheets are made of high temperature resistant rubber, and one side of the sealing sheet rotates on one side of the box body.

[0019] The effect achieved by the above components is that the contact between the shaft rod and the inner wall of the box body can be further sealed by arranging the sealing sheet, thereby preventing waste water from leaking through the connection between the shaft rod and the inner wall of the box body as much as possible.

[0020] Compared with the prior art, the advantages and positive effects of the utility model are:

[0021] In the utility model, the electric heating plate of the heating device is arranged outside the box so that the electric heating plate will not be in direct contact with the wastewater, and the copper heat-conducting frame is used for heat conduction so that the electric heating plate can fully heat the box. At the same time, the heat preservation box can avoid the heat dissipation on the surface of the box as much as possible, so that the heating effect of the electric heating plate is better, and the heating temperature can be controlled more accurately when using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the thermal insulation box of the utility model;

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the box body of the utility model;

[0025] Figure 4 For this utility model Figure 3 A local enlarged three-dimensional structure schematic diagram;

[0026] Figure 5 It is a partial cross-sectional three-dimensional structural schematic diagram of the box body of the utility model.

[0027] Legend: 1. Box body; 2. Heating device; 3. Auxiliary device; 4. Water inlet pipe; 5. Water outlet pipe; 6. Dosing pipe; 21. Insulation box; 22. Electric heating plate; 23. Heat-conducting rod; 24. Heat-conducting frame; 25. Heat dissipation component; 251. Copper tube; 252. Rack rod; 253. First motor; 254. Fan blade; 255. Rotating block; 256. Baffle; 31. Second motor; 32. Shaft; 33. Bending plate; 34. Sealing sheet. DETAILED DESCRIPTION

[0028] Embodiment 1, as Figures 1-3As shown, a desulfurization wastewater ammonia nitrogen removal device comprises a box body 1, a temperature sensor and a pH value detector are arranged inside the box body 1, an inlet pipe 4 and an outlet pipe 5 are arranged at both ends of the box body 1, and electric control valves are arranged inside the inlet pipe 4 and the outlet pipe 5, respectively, a dosing pipe 6 is arranged at the top of the box body 1, a heating device 2 is arranged on the outer surface of the box body 1 for comprehensively and quickly heating the box body 1, and an auxiliary device 3 is arranged on the outer surface of the box body 1 for stirring the wastewater inside the box body 1. When the desulfurization wastewater is subjected to ammonia nitrogen removal treatment, the box body 1 is used to heat the wastewater. The control box on one side opens the electric control valve inside the water inlet pipe 4, allowing the desulfurization wastewater to enter the box 1 through the water inlet pipe 4, heat the box 1 through the heating device 2, add a proper amount of phosphate into the box 1 through the dosing pipe 6 at the top of the box 1, and transmit the internal temperature and pH value data of the box 1 to the control box on one side of the box 1 through the temperature sensor and the pH value detector for display, remove the ammonia nitrogen in the wastewater through heating and the reaction of phosphate with the wastewater, open the electric control valve inside the outlet pipe 5 to allow the treated water to be output through the outlet pipe 5.

[0029] Reference Figures 2-5 As shown, in this embodiment: the heating device 2 includes an insulation box 21, which is composed of a plurality of insulation boards. Part of the box body 1 is located inside the insulation box 21 as a whole. The outlet pipe 5 runs through one side of the insulation box 21. Two electric heating plates 22 are arranged at the bottom of the outer surface of the box body 1. Two heat-conducting rods 23 are fixedly connected to the outer surface of the electric heating plate 22. The outer surface of the heat-conducting rod 23 is fixedly connected to the outer surface of the box body 1. The top of the heat-conducting rod 23 is fixedly connected to a heat-conducting frame 24. The heat-conducting frame 24 is wrapped around the outer surface of the box body 1. The heat-conducting rod 23 and the heat-conducting frame 24 are both made of metal copper. By setting the heating device 2, the heat-conducting rod 23 and the heat-conducting frame 24 are fixedly connected to the outer surface of the box body 1. When the waste water in the box is heated, the electric heating plate 22 at the bottom of the box body 1 is operated to heat the bottom of the box body 1, and the heat is transferred to the copper heat conducting frame 24 through the copper heat conducting rod 23, and the box body 1 is fully heated by the heat conducting frame 24. The electric heating plate 22 is arranged outside the box body 1 so that the electric heating plate 22 will not be in direct contact with the waste water, and the copper heat conducting frame 24 is used for heat conduction so that the electric heating plate 22 can fully heat the box body 1. At the same time, the heat preservation box 21 can avoid the heat dissipation on the surface of the box body 1 as much as possible, so that the heating effect of the electric heating plate 22 is better, and the heating temperature can be controlled more accurately when using the device.

[0030] Reference Figures 2-5As shown, in this embodiment: a heat dissipation component 25 is arranged on the outer surface of the box body 1, and the heat dissipation component 25 includes a copper tube 251, both ends of the copper tube 251 penetrate the outer surface of the heat preservation box 21, and the bottom end of the copper tube 251 is fixedly connected to the top of the heat-conducting frame 24, and a frame rod 252 is arranged at one end of the copper tube 251, and a first motor 253 is arranged on one side of the frame rod 252. The output end of the first motor 253 is fixedly connected with a plurality of fan blades 254. When the temperature of the surface of the box body 1 and the inside of the box body 1 needs to be reduced during the operation of the ammonia nitrogen removal device, the first motor 253 can be operated to drive the fan blades 254 to rotate and blow air into the copper tube 251, so that the air enters the copper tube 251 to take away the heat of the heat-conducting rod 23 and the surface of the box body 1 and output it through the other end of the copper tube 251, so as to quickly reduce the temperature of the box body 1 and improve the use efficiency of the ammonia nitrogen removal device. The end of the copper tube 251 away from the frame rod 252 is rotatably connected with a rotating block 2 55. A baffle 256 is fixedly connected to one side of the rotating block 255. When the heat dissipation component 25 is not in operation, one side of the baffle 256 will fit on one end of the copper tube 251 to close the outlet of the copper tube 251, so as to avoid the heat inside the box 1 from being dissipated through the copper tube 251 as much as possible. The first motor 253 drives the fan blade 254 to rotate and blows air into the copper tube 251. When the air reaches the baffle 256, the baffle 256 will be blown to make the rotating block 255 rotate to open one end of the copper tube 251, so that the hot air can be output normally. The side of the baffle 256 away from the copper tube 251 is a hard plate made of PC material, and the end of the baffle 256 close to the copper tube 251 is made of high-temperature resistant rubber. By setting the side of the baffle 256 away from the copper tube 251 as a hard plate made of PC material and the end close to the copper tube 251 as a high-temperature resistant rubber, the baffle 256 has better sealing performance and is not easy to deform when closing the copper tube 251.

[0031] Reference Figure 1 , Figure 2 and Figure 5As shown in the figure, in this implementation: The auxiliary device 3 includes a shaft rod 32. Both ends of the shaft rod 32 are rotatably connected to the inner wall of the box body 1. A second motor 31 is arranged on one side of the box body 1. The output end of the second motor 31 is fixedly connected to one end of the shaft rod 32. A number of bending plates 33 are fixedly connected to the outer surface of the shaft rod 32. By arranging the bending plates 33, when phosphate is added to the inside of the box body 1 and the inside of the box body 1 is heated by the heating device 2, the second motor 31 can be operated to drive the shaft rod 32 to rotate, so that the bending plates 33 stir the wastewater inside the box body 1, enabling the heating device 2 to heat the water inside the box body 1 more comprehensively, and the phosphate can react more fully with the wastewater, improving the use efficiency of the device. Sealing sheets 34 are fixedly connected to both ends of the box body 1 respectively. The sealing sheets 34 are made of high-temperature resistant rubber. One side of the sealing sheets 34 rotates on one side of the box body 1. By arranging the sealing sheets 34, the contact part between the shaft rod 32 and the inner wall of the box body 1 can be further sealed, and it is possible to avoid the leakage of wastewater through the connection part between the shaft rod 32 and the inner wall of the box body 1 as much as possible.

[0032] Working principle: When using the ammonia nitrogen removal device to remove ammonia nitrogen from the desulfurization wastewater, connect the desulfurization wastewater conveying pipeline to one end of the water inlet pipe 4. Open the electric control valve inside the water inlet pipe 4 through the control box on one side of the box body 1, so that the desulfurization wastewater enters the inside of the box body 1 through the water inlet pipe 4. Operate the electric heating plate 22 at the bottom of the box body 1 to heat the bottom of the box body 1, and transfer the heat to the copper heat conduction frame 24 through the copper heat conduction rod 23. The box body 1 is heated comprehensively through the heat conduction frame 24, and an appropriate amount of phosphate is added to the inside of the box body 1 through the medicine adding pipe 6 at the top of the box body 1. The temperature and pH value data inside the box body 1 are transmitted to the control box on one side of the box body 1 for display through the temperature sensor and the pH value detector. At the same time, the second motor 31 can be operated to drive the shaft rod 32 to rotate, so that the bending plates 33 stir the wastewater inside the box body 1, enabling the heating device 2 to heat the water inside the box body 1 more comprehensively, and the phosphate can react more fully with the wastewater. When it is necessary to reduce the temperature inside the box body 1, operate the first motor 253 to drive the fan blade 254 to rotate and blow air into the copper pipe 251, so that the air enters the copper pipe 251 to take away the heat of the heat conduction rod 23 and the surface of the box body 1 and is output from the other end of the copper pipe 251, quickly reducing the temperature of the box body 1. The ammonia nitrogen in the wastewater is removed by heating the wastewater and reacting the phosphate with the wastewater. Finally, open the electric control valve inside the water outlet pipe 5 so that the treated water is output through the water outlet pipe 5.

[0033] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still belong to the protection scope of the technical solution of the present utility model. In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

Claims

1. A device for removing ammonia nitrogen from desulfurized wastewater, comprising a box body (1), characterized in that: Inside the box body (1), a temperature sensor and a pH value detector are provided. At both ends of the box body (1), a water inlet pipe (4) and a water outlet pipe (5) are respectively provided. Electric control valves are respectively arranged inside the water inlet pipe (4) and the water outlet pipe (5). A medicine feeding pipe (6) is arranged at the top end of the box body (1). A heating device (2) capable of comprehensively and quickly heating the box body (1) is arranged on the outer surface of the box body (1). An auxiliary device (3) capable of stirring the wastewater inside the box body (1) is arranged on the outer surface of the box body (1).

2. The desulfurized wastewater ammonia-nitrogen removal device according to claim 1, characterized in that: The heating device (2) includes a heat preservation box (21). The heat preservation box (21) is formed by splicing a plurality of heat preservation plates. A part of the box body (1) is entirely located inside the heat preservation box (21). The water outlet pipe (5) penetrates through one side of the heat preservation box (21). Two electric heating plates (22) are arranged at the bottom end of the outer surface of the box body (1). Two heat conducting rods (23) are fixedly connected to the outer surface of the electric heating plate (22). The outer surface of the heat conducting rod (23) is fixedly connected to the outer surface of the box body (1). The top end of the heat conducting rod (23) is fixedly connected to a heat conducting frame (24). The heat conducting frame (24) wraps around the outer surface of the box body (1). Both the heat conducting rod (23) and the heat conducting frame (24) are made of metallic copper.

3. The desulfurized wastewater ammonia nitrogen removal device according to claim 2, characterized in that: A heat dissipation component (25) capable of quickly dissipating heat inside the box body (1) is arranged on the outer surface of the box body (1).

4. A device for removing ammonia nitrogen from desulfurized wastewater according to claim 3, characterized in that: The heat dissipation component (25) includes a copper pipe (251). Both ends of the copper pipe (251) penetrate through the outer surface of the heat preservation box (21). The bottom end of the copper pipe (251) is fixedly connected to the top end of the heat conducting frame (24). A support rod (252) is arranged at one end of the copper pipe (251). A first motor (253) is arranged on one side of the support rod (252). A plurality of fan blades (254) are fixedly connected to the output end of the first motor (253).

5. The desulfurized wastewater ammonia-nitrogen removal device according to claim 4, characterized in that: A rotating block (255) is rotatably connected to the end of the copper pipe (251) away from the support rod (252). A baffle (256) is fixedly connected to one side of the rotating block (255).

6. The desulfurized wastewater ammonia nitrogen removal device according to claim 5, wherein: The side of the baffle (256) away from the copper pipe (251) is a hard board made of PC material, and the end of the baffle (256) close to the copper pipe (251) is made of high-temperature resistant rubber.

7. The denitrification device for desulfurized wastewater according to claim 6, wherein: The auxiliary device (3) includes a shaft rod (32). Both ends of the shaft rod (32) are rotatably connected to the inner wall of the box body (1). A second motor (31) is arranged on one side of the box body (1). The output end of the second motor (31) is fixedly connected to one end of the shaft rod (32). A plurality of bent plates (33) are fixedly connected to the outer surface of the shaft rod (32).

8. The desulfurized wastewater ammonia nitrogen removal device according to claim 7, characterized in that: Sealing sheets (34) are respectively fixedly connected to both ends of the box body (1). The sealing sheets (34) are made of high-temperature resistant rubber, and one side of the sealing sheets (34) rotates on one side of the box body (1).

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