Wastewater treatment acid-base dosing device for thermal power plant

Abstract

The utility model relates to the field of wastewater treatment of a thermal power plant, in particular to an acid-base dosing device for wastewater treatment of the thermal power plant, which comprises a mixing box body, an acidic dosing box and an alkaline dosing box, the upper end of the mixing box body is communicated with a liquid inlet pipe, the acidic dosing tank is communicated with the liquid inlet pipe through a first pipeline, and the alkaline dosing tank is communicated with the liquid inlet pipe through a second pipeline; a pH value sensor is arranged in the mixing box body; a supporting frame is arranged at the lower end of the mixing box body, a motor is fixedly arranged in the supporting frame, a rotating cylinder is rotatably arranged on the mixing box body, and the upper end of the rotating cylinder is rotatably connected with the liquid inlet pipe; at least three liquid distribution holes are formed in the rotating cylinder at intervals from bottom to top, and one-way valves are arranged on the liquid distribution holes; and stirring devices are arranged on the two sides of the rotating cylinder. The wastewater treatment acid-base dosing device solves the problem that in the prior art, a wastewater treatment acid-base dosing device is not uniform in dosing, and the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of wastewater treatment in thermal power plants, in particular to an acid and alkali dosing device for wastewater treatment in thermal power plants. Background Art

[0002] A thermal power plant refers to a thermal power plant that uses steam extraction or exhaust from steam turbines to provide heat to users while generating electricity. Its main working principle is to use the hot water generated by the thermal power plant for heating after reheating. It usually uses wastewater to generate electricity. However, during power generation, it is necessary to add acidic and alkaline solutions to the wastewater for purification, which requires the use of a dosing device.

[0003] At present, Chinese patent announcement No. CN213834676U discloses an acid-base dosing device for wastewater treatment in thermal power plants, which effectively reduces the workload of manual dosing, improves dosing efficiency, and improves practicality; it includes a liquid medicine barrel, a first connecting frame, a stirring motor, a second connecting frame and a solution pump, the bottom end of the liquid medicine barrel is connected to the left side of the top end of the first connecting frame, a chamber is arranged inside the liquid medicine barrel, a feed pipe is arranged on the right side of the top end of the chamber, a bearing is arranged inside the top end of the liquid medicine barrel chamber, a bearing seat is arranged at the bottom end of the chamber, a rotating rod is arranged at the bottom output end of the stirring motor, the bottom end of the rotating rod is inserted into and fixed to the inside of the bearing seat, the outer shaft wall of the rotating rod is fixed to the inner ring of the bearing, a stirring blade is arranged on the rotating rod, and the stirring blade is located in the chamber of the liquid medicine barrel, and a third connecting frame is arranged on the left and right sides of the bottom end of the second connecting frame.

[0004] However, although this device improves the efficiency of dosing, in actual use, since the liquid medicine is added at a fixed point, there are large differences in the pH value of wastewater at different depths and regions, which makes the stirring and mixing efficiency low, and there is a possibility of uneven mixing of the medicine and wastewater, affecting the wastewater treatment effect. Utility Model Content

[0005] Therefore, in view of the above problems, the utility model proposes an acid-base dosing device for wastewater treatment in a thermal power plant to solve the problem in the prior art that uneven addition of reagents may lead to low mixing efficiency of the reagents and wastewater.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An acid-base dosing device for wastewater treatment in a thermal power plant comprises a mixing box and an acid dosing box and an alkaline dosing box arranged on the top of the mixing box, wherein the upper part of the side wall of the mixing box is connected to a water inlet pipe, and the lower part of the side wall of the mixing box is connected to a water outlet pipe; the upper end of the mixing box is connected to a liquid inlet pipe, the liquid inlet pipe is connected to a water pipe and an air pipe, the water pipe is provided with a water pump, the air pipe is provided with an air booster pump, the acid dosing box is connected to the liquid inlet pipe through a first pipeline, the alkaline dosing box is connected to the liquid inlet pipe through a second pipeline, the first pipeline is provided with a first valve, and the second pipeline is provided with a second valve; a pH value sensor is provided in the mixing box;

[0008] A support frame is provided at the lower end of the mixing box, a motor is fixedly provided in the support frame, a rotating cylinder is rotatably provided in the mixing box, and the lower end of the rotating cylinder passes through the mixing box and is connected to the motor, and the upper end of the rotating cylinder is rotatably connected to the liquid inlet pipe; the rotating cylinder is provided with at least three liquid distribution holes spaced from bottom to top, and a one-way valve is provided on the liquid distribution hole;

[0009] A stirring device is provided on both sides of the rotating drum, and the stirring device includes a rotating shaft and a plurality of stirring rods evenly arranged on the outer side wall of the rotating shaft, and the rotating shaft is rotatably connected to the mixing box; a first gear is fixedly provided on the rotating drum, and a second gear is provided on the rotating shaft, and the first gear and the second gear are meshed with each other.

[0010] Furthermore, the rotating cylinder includes a plurality of cylindrical parts connected in sequence, the radius of the plurality of cylindrical parts decreases from top to bottom, and the cross-section of the rotating cylinder is in an inverted step shape.

[0011] Furthermore, the number of the cylindrical parts is not less than three.

[0012] Furthermore, a plurality of stirring blades are evenly arranged on the outer side wall of the rotating cylinder, and the stirring blades and the stirring rods are staggered.

[0013] Furthermore, an annular connecting block is fixedly connected to the lower end of the outer wall of the liquid inlet pipe, and an annular connecting groove body is fixedly connected to the upper end of the inner wall of the rotating cylinder. The connecting block and the connecting groove body match, and the connecting block is rotatably arranged in the connecting groove body.

[0014] By adopting the above technical solution, the beneficial effects of the utility model are:

[0015] 1. An acidic dosing box and an alkaline dosing box are provided to store acidic solutions and alkaline solutions separately, so as to facilitate their classification and delivery according to demand and neutralize the acid and alkali of the wastewater in the mixing box; a pH sensor is provided to detect the pH value of the wastewater in the mixing box, so as to determine the amount of reagents required to be delivered.

[0016] 2. By setting up a rotating drum, acidic liquid or alkaline liquid can be introduced into the rotating drum through the liquid inlet pipe, and high-pressure air can be pumped into the rotating drum through the air booster pump. The rotating drum is then driven to rotate by the rotation of the motor. The liquid in the rotating drum can be sprayed out from each liquid distribution hole. Since the liquid distribution holes are at different depths, liquid can be added to wastewater at different depths, so that the liquid and wastewater are fully in contact, effectively improving the mixing efficiency and wastewater treatment effect. At the same time, high-pressure air is sprayed out from the liquid distribution holes to form aeration in the mixing box, which is beneficial to improve The uniformity of mixing of liquid medicine and wastewater; by setting a one-way valve, wastewater will not enter the rotating drum to affect the addition of liquid medicine; by designing the cross-section of the rotating drum into an inverted step type, the liquid medicine can be prevented from flowing to the bottom of the rotating drum too quickly. At the same time, since the density of the liquid medicine used is generally greater than the density of water, it will flow downward under the action of gravity, causing more liquid medicine to spill out from the upper part of the rotating drum, which is conducive to the uniform mixing of liquid medicine and sewage. After a single addition of liquid medicine is completed, clean water is pumped in by a water pump to clean the inside of the rotating drum to improve the accuracy of dosing.

[0017] 3. By setting up a stirring mechanism, when the motor is working, it can drive the first gear to rotate, and the first gear can drive the second gear to rotate, thereby driving the rotating shaft to rotate. The stirring rod on the rotating shaft can stir the wastewater to ensure that the agent and the wastewater are fully and evenly mixed, and increase the mixing speed of the agent and the wastewater, thereby ensuring the efficiency and quality of wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0019] Figure 2 yes Figure 1 A magnified view of middle;

[0020] Figure 3 yes Figure 1 Enlarged view of B.

[0021] In the figure: 1. mixing box; 11. liquid inlet pipe; 12. connecting block; 13. water inlet pipe; 14. water outlet pipe; 15. water pipe; 16. air pipe; 17. water pump; 18. air booster pump; 2. acid dosing box; 21. first pipeline; 22. first valve; 3. alkaline dosing box; 31. second pipeline; 32. second valve; 4. pH sensor; 51. support frame; 52. motor; 6. rotating cylinder; 61. liquid distribution hole; 63. cylinder; 64. stirring blade; 65. connecting tank; 71. rotating shaft; 72. stirring rod; 81. first gear; 82. second gear. DETAILED DESCRIPTION

[0022] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0023] refer to Figures 1 to 3 The present embodiment provides an acid-base dosing device for wastewater treatment in a thermal power plant, comprising a mixing box 1 and an acid dosing box 2 and an alkaline dosing box 3 arranged on the top of the mixing box 1; a liquid inlet pipe 11 is connected to the upper end of the mixing box 1, and the liquid inlet pipe 11 is connected to a water pipe 15 and an air pipe 16, a water pump 17 is provided on the water pipe 15, and an air booster pump 18 is provided on the air pipe 16, the acid dosing box 2 is connected to the liquid inlet pipe 11 through a first pipe 21, and the alkaline dosing box 3 is connected to the liquid inlet pipe 11 through a second pipe 31, a first valve 22 is provided on the first pipe 21, and a second valve 32 is provided on the second pipe 31; a pH sensor 4 is provided in the mixing box 1. The mixing box 1 is used for acid-base neutralization treatment of wastewater, the acid dosing box 2 and the alkaline dosing box 3 are used to store acidic agents and alkaline agents separately, the first valve 22 and the second valve 32 are set to control the injection speed and injection amount of the acidic agent or the alkaline agent, and the pH sensor 4 is used to detect the pH value of the wastewater in the mixing box 1.

[0024] The lower end of the mixing box 1 is provided with a support frame 51, and a motor 52 is fixedly provided in the support frame 51. A rotating drum 6 is rotatably provided in the mixing box 1, and the lower end of the rotating drum 6 passes through the mixing box 1 and is connected to the motor 52, and the upper end of the rotating drum 6 is rotatably connected to the liquid inlet pipe 11; the rotating drum 6 is provided with at least three liquid distribution holes 61 spaced from bottom to top, preferably, the number of liquid distribution holes 61 is four, and a one-way valve (not shown in the figure) is provided on the liquid distribution hole 61. High-pressure air is pumped into the rotating drum 6 by the air booster pump 18, and then the rotating drum 6 is driven to rotate by the rotation of the motor 52. The liquid medicine in the rotating drum 6 can be sprayed out from each liquid distribution hole 61. Since the liquid distribution holes 61 are at different depths, liquid medicine can be added to wastewater at different depths, so that the liquid medicine is fully in contact with the wastewater, effectively improving the mixing efficiency and wastewater treatment effect.

[0025] A stirring device is provided on both sides of the rotating cylinder 6, and the stirring device includes a rotating shaft 71 and a plurality of stirring rods 72 uniformly arranged on the outer wall of the rotating shaft 71, and the rotating shaft 71 is rotatably connected to the mixing box 1; a first gear 81 is fixedly provided on the rotating cylinder 6, and a second gear 82 is provided on the rotating shaft 71, and the first gear 81 and the second gear 82 are meshed. When the motor 52 drives the first gear 81 to rotate, the first gear 81 will drive the second gear 82 to rotate, thereby driving the rotating shaft 71 to rotate, and the stirring rod 72 on the rotating shaft 71 can stir the wastewater to ensure that the medicine and the wastewater are fully mixed and uniform.

[0026] The pH sensor 4 and the motor 52 are both existing devices and will not be described in detail here.

[0027] In this specific embodiment, the rotating drum 6 includes a plurality of cylindrical portions 63 connected in sequence, the radius of the plurality of cylindrical portions 63 decreases from top to bottom, and the cross section of the rotating drum 6 is in an inverted step shape. Since the density of the pH value adjusting agent used is generally greater than the density of water, it will flow downward under the action of gravity, so the rotating drum 6 is set to an inverted step shape, so that more liquid medicine is sprinkled from the upper part of the rotating drum 6, which is conducive to the uniform mixing of the liquid medicine and sewage.

[0028] In this specific embodiment, the number of the cylindrical portions 63 is not less than three.

[0029] In this specific embodiment, a plurality of stirring blades 64 are evenly arranged on the outer wall of the rotating cylinder 6, and the stirring blades 64 are staggered with the stirring rods 72. By arranging the stirring blades 64, when the rotating cylinder 6 rotates, the stirring blades 64 will be driven to rotate, further improving the mixing effect of the wastewater and the liquid medicine, making the mixing more sufficient, and improving the wastewater treatment efficiency.

[0030] In this specific embodiment, the lower end of the outer wall of the liquid inlet pipe 11 is fixedly connected with an annular connecting block 12, and the upper end of the inner wall of the rotating cylinder 6 is fixedly connected with an annular connecting groove body 65, and the connecting block 12 matches the connecting groove body 65, and the connecting block 12 is rotatably arranged in the connecting groove body 65. The arrangement of the connecting block 12 and the connecting groove body 65 enables the rotating cylinder 6 to be rotatably connected with the liquid inlet pipe 11, ensuring that the rotating cylinder 6 can rotate smoothly.

[0031] In this specific embodiment, the upper part of the side wall of the mixing box 1 is connected to a water inlet pipe 13, and the lower part of the side wall of the mixing box 1 is connected to a water outlet pipe 14. The water inlet pipe 13 is used to put wastewater, and the water outlet pipe 14 is used to discharge the treated wastewater.

[0032] The working principle of the utility model is as follows;

[0033] First, the amount of medicine to be added is determined based on the pH value of the wastewater in the mixing box 1 detected by the pH sensor 4; the first valve 22 or the second valve 32 is opened to allow the acidic liquid in the acidic dosing box 2 or the alkaline liquid in the alkaline dosing box 3 to be poured into the rotating cylinder 6 through the liquid inlet pipe 11, and then the motor 52 is turned on. The motor 52 drives the rotating cylinder 6 and the first gear 81 to rotate, and the medicine liquid in the rotating cylinder 6 is mixed with the wastewater through the one-way valve on the liquid distribution hole 61 under the action of centrifugal force; at the same time, the first gear 81 drives the second gear 82 to rotate, and the second gear 82 drives the rotating shaft 71 to rotate, so that the stirring rod 72 on the rotating shaft 71 stirs the wastewater, so that the wastewater and the medicine liquid are evenly mixed, thereby improving the wastewater treatment efficiency.

[0034] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A wastewater treatment acid and alkali dosing device for thermal power plants, characterized in that: It comprises a mixing box and an acidic dosing box and an alkaline dosing box arranged on the top of the mixing box, the upper part of the side wall of the mixing box is connected with a water inlet pipe, and the lower part of the side wall of the mixing box is connected with a water outlet pipe; the upper end of the mixing box is connected with a liquid inlet pipe, the liquid inlet pipe is connected with a water pipe and an air pipe, the water pipe is provided with a water pump, the air pipe is provided with an air booster pump, the acidic dosing box is connected with the liquid inlet pipe through a first pipeline, the alkaline dosing box is connected with the liquid inlet pipe through a second pipeline, the first pipeline is provided with a first valve, and the second pipeline is provided with a second valve; a pH sensor is provided in the mixing box; A support frame is provided at the lower end of the mixing box, a motor is fixedly provided in the support frame, a rotating cylinder is rotatably provided in the mixing box, and the lower end of the rotating cylinder passes through the mixing box and is connected to the motor, and the upper end of the rotating cylinder is rotatably connected to the liquid inlet pipe; the rotating cylinder is provided with at least three liquid distribution holes spaced from bottom to top, and a one-way valve is provided on the liquid distribution hole; A stirring device is provided on both sides of the rotating drum, and the stirring device includes a rotating shaft and a plurality of stirring rods evenly arranged on the outer side wall of the rotating shaft, and the rotating shaft is rotatably connected to the mixing box; a first gear is fixedly provided on the rotating drum, and a second gear is provided on the rotating shaft, and the first gear and the second gear are meshed with each other.

2. The acid-base dosing device for wastewater treatment in a thermal power plant according to claim 1, characterized in that: The rotating cylinder includes a plurality of cylindrical parts connected in sequence, the radius of the plurality of cylindrical parts decreases in sequence from top to bottom, and the cross section of the rotating cylinder is in an inverted step shape.

3. The acid-base dosing device for wastewater treatment in a thermal power plant according to claim 2, characterized in that: The number of the cylindrical parts is not less than three.

4. The acid-base dosing device for wastewater treatment in a thermal power plant according to claim 1, characterized in that: A plurality of stirring blades are evenly arranged on the outer side wall of the rotating cylinder, and the stirring blades and the stirring rods are staggered.

5. The acid and alkali dosing device for wastewater treatment in a thermal power plant according to claim 1, characterized in that: The lower end of the outer wall of the liquid inlet pipe is fixedly connected with an annular connecting block, the upper end of the inner wall of the rotating cylinder is fixedly connected with an annular connecting groove body, the connecting block and the connecting groove body match, and the connecting block is rotatably arranged in the connecting groove body.

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