Chemical adding device for sedimentation tank
By designing a dosing device with stirring blades and drug outlet tubes in the sedimentation tank, the rotation of the agitated blades generates shear force and centrifugal force, the problems of easy blockage of existing dosing devices and disturbed drug flow are solved, and rapid dispersion and uniform dosing of drugs are achieved.
Patent Information
- Application Number
- CN202421822110.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The coagulant dosing device in the existing precipitation tank has problems such that the dosing holes are prone to clogging and the flow of the agent is affected by water flow disturbance, resulting in poor dosing effect.
A precipitation tank dosing device including a stirring shaft, a dispenser, agitating blade and a drug outlet tube is designed to generate shear and centrifugal forces through the rapid rotation of the stirring blade to ensure that the agent is quickly dispersed in water and avoided clogging.
It effectively improves the rapid dispersion and uniformity of the coagulant in water, reduces the load of the precipitation tank, and ensures the stable and efficient operation of the dosing device.
Smart Images
Figure CN222907656U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of industrial sewage treatment, in particular to a sedimentation tank dosing device. Background Art
[0002] Sedimentation tank is the most widely used and mature pretreatment technology in industrial water treatment. It can remove suspended particles and some hardness in water through a series of physical and chemical changes such as flocculation, coagulation and sedimentation. The sedimentation tank consists of a pre-coagulation reaction tank, a lime reaction tank, a flocculation sedimentation tank and a post-coagulation reaction tank. The pre-coagulation reaction tank is a rectangular structure with a fast mixer for the rapid mixing reaction of the incoming water and the coagulant. The addition of coagulant can coagulate the suspended solids and oil in the sewage, destabilize the colloidal impurities in the wastewater to form fine alum flowers, and provide favorable conditions for the subsequent flocculation reaction.
[0003] Most existing sedimentation tanks use static dosing pipes to add coagulants. The static dosing pipes are provided with multiple dosing holes, and the coagulant enters the sedimentation tank through the dosing holes. However, in actual applications, it is found that due to the relatively viscous coagulant, its flow rate in the dosing pipe and at the dosing hole is relatively slow, which makes the dosing hole easily blocked by flocs; at the same time, the flow or diffusion speed of the coagulant is greatly disturbed by the water flow in the sedimentation tank, which seriously affects the actual drug delivery effect.
[0004] In view of this, the inventor has designed a sedimentation tank dosing device based on many years of production design experience in this field and related fields and through repeated experiments, in order to solve the problems existing in the prior art. Utility Model Content
[0005] The utility model aims to provide a sedimentation tank dosing device, which can effectively improve the rapid dispersion of coagulant in water and reduce the load of the sedimentation tank.
[0006] To achieve the above-mentioned purpose, the utility model proposes a sedimentation tank dosing device, wherein the sedimentation tank dosing device includes a stirring shaft, a medicine distributor, at least two stirring blades and at least two medicine outlet pipes, the medicine distributor and the at least two stirring blades are respectively arranged on the stirring shaft, at least two stirring blades are fixedly connected to one end of the stirring shaft and are evenly distributed along the circumferential direction of the stirring shaft, each stirring blade is respectively provided with at least one medicine outlet pipe, one end of the medicine outlet pipe is connected to the medicine distributor, and the other end of the medicine outlet pipe is formed with a medicine outlet.
[0007] The sedimentation tank dosing device as described above, wherein the stirring shaft is vertically arranged, at least two stirring blades are arranged at the bottom end of the stirring shaft, the medicine distributor includes a cylinder body sleeved outside the stirring shaft, an annular space is provided between the inner wall of the cylinder body and the outer wall of the stirring shaft, the top end of the annular space is open, the bottom end of the annular space is closed, and one end of the medicine outlet pipe is fixedly connected to the cylinder body and communicated with the annular space.
[0008] The sedimentation tank dosing device as described above, wherein the cylinder includes a reducing section, a sleeve section and a diverter section arranged in sequence from top to bottom, the inner wall surface of the reducing section is a conical surface which gradually decreases in diameter from top to top, the inner wall surface of the sleeve section and the inner wall surface of the diverter section are cylindrical surfaces, and the inner diameter of the sleeve section and the inner diameter of the diverter section are equal.
[0009] The sedimentation tank dosing device as described above, wherein the different diameter section is fixedly connected to the stirring shaft via a support frame.
[0010] In the sedimentation tank dosing device as described above, an opening communicating with the annular spacer is formed on the outer wall of the diversion section, a diversion pipe is connected to the outside of the opening, and the drug outlet pipe is connected to the annular spacer through the diversion pipe.
[0011] The dosing device for a sedimentation tank as described above, wherein the inner diameter of the diversion pipe is smaller than the inner diameter of the diversion section.
[0012] The sedimentation tank dosing device as described above, wherein the bottom end of the cylinder is fixed to the stirring shaft via a mechanical seal.
[0013] The sedimentation tank dosing device as described above, wherein the cylinder is a stainless steel cylinder, and the drug outlet pipe is a stainless steel drug outlet pipe.
[0014] The dosing device for a sedimentation tank as described above, wherein the dosing device further comprises a motor, and the motor is connected to the other end of the stirring shaft and drives the stirring shaft to rotate.
[0015] The sedimentation tank dosing device as described above, wherein the drug outlet pipe extends to the outer edge of the stirring blade.
[0016] Compared with the prior art, the utility model has the following characteristics and advantages:
[0017] The sedimentation tank dosing device proposed by the utility model adds the flocculating agent in the distributor into the water through the drug outlet pipe arranged on the stirring blade. Since the drug outlet pipe moves rapidly with the stirring blade, the drug flowing out from the drug outlet of the drug outlet pipe is subjected to the shear force generated by the rapid rotation of the stirring blade, and can be quickly and evenly dispersed in the water. At the same time, the drug outlet pipe rotates rapidly with the stirring blade to form a centrifugal force, and the centrifugal force can effectively prevent the suspended matter in the water from blocking the drug outlet, thereby ensuring that the drug can flow out smoothly. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.
[0019] Figure 1 This is a schematic diagram of the structure of the sedimentation tank dosing device proposed by the utility model;
[0020] Figure 2 It is a schematic diagram of fixing the different diameter sections in the utility model.
[0021] Description of Reference Numerals
[0022] 100. Dosing device for sedimentation tank; 10. Stirring shaft;
[0023] 20. Medicine distributor; 21. Different diameter section;
[0024] 22. Shaft sleeve section; 23. Diverter section;
[0025] 24. Diverter pipe; 30. Stirring blade;
[0026] 40. medicine outlet pipe; 50. support frame;
[0027] 60. Mechanical seal; 70. Motor. DETAILED DESCRIPTION
[0028] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.
[0029] Unless otherwise specified, the directions of up, down, left, and right mentioned in this document are all based on the directions shown in this utility model. Figure 1 The up, down, left and right directions in the figure shall prevail and are explained here.
[0030] like Figure 1 , Figure 2 As shown, the utility model proposes a sedimentation tank dosing device 100, which includes a stirring shaft 10, a medicine distributor 20, at least two stirring blades 30 and at least two medicine outlet pipes 40. The medicine distributor 20 and the at least two stirring blades 30 are respectively arranged on the stirring shaft 10, and the at least two stirring blades 30 are fixedly connected to one end of the stirring shaft 10 and are evenly distributed along the circumferential direction of the stirring shaft 10. At least one medicine outlet pipe 40 is respectively arranged on each stirring blade 30, one end of the medicine outlet pipe 40 is connected to the medicine distributor 20, and the other end of the medicine outlet pipe 40 is formed with a medicine outlet.
[0031] The sedimentation tank dosing device 100 proposed by the utility model adds the flocculating agent in the distributor 20 into the water through the drug outlet pipe 40 arranged on the stirring blade 30. Since the drug outlet pipe 40 moves rapidly with the stirring blade 30, the agent flowing out from the drug outlet of the drug outlet pipe 40 is subjected to the shear force generated by the rapid rotation of the stirring blade, and can be quickly and evenly dispersed in the water; at the same time, the drug outlet pipe 40 rotates rapidly with the stirring blade 30 to form a centrifugal force, and the centrifugal force can effectively prevent the suspended matter in the water from blocking the drug outlet, thereby ensuring that the agent can flow out smoothly.
[0032] In an optional embodiment of the utility model, the stirring shaft 10 is arranged vertically, at least two stirring blades 30 are arranged at the bottom end of the stirring shaft 10, and the medicine distributor 20 includes a cylinder sleeved outside the stirring shaft 10, and an annular space is provided between the inner wall of the cylinder and the outer wall of the stirring shaft 10, the top of the annular space is open, and the bottom of the annular space is closed, and one end of the medicine outlet pipe 40 is fixed to the cylinder and communicated with the annular space. With the above structure, the medicine can flow in from the top of the annular space, and then flow to the medicine outlet pipe 40 from the bottom of the annular space. When stirring, the stirring shaft 10 and the cylinder rotate synchronously, but the flow of the medicine will not be affected by the rotation of the stirring shaft 10 and the cylinder.
[0033] In an optional example of the present invention, the outlet of the drug delivery tube of the agent (flocculant) can be set above the annular space and have a certain gap with the stirring shaft 10 and the cylinder, so that the agent can flow smoothly into the annular space even when the stirring shaft 10 and the cylinder rotate.
[0034] In an optional example of this embodiment, the cylinder includes a different diameter section 21, a sleeve section 22 and a diverter section 23 arranged in sequence from top to bottom, the inner wall surface of the different diameter section 21 is a conical surface with a gradually decreasing diameter from top to top, the inner wall surface of the sleeve section 22 and the inner wall surface of the diverter section 23 are cylindrical surfaces, and the inner diameters of the sleeve section 22 and the diverter section 23 are equal. With the above structure, the top of the annular spacer is trumpet-shaped, which is more convenient for the inflow of the reagent (flocculant).
[0035] In an optional example, the inner diameter of the sleeve segment 22 is one size grade larger than the outer diameter of the stirring shaft 10 (DN80-DN100).
[0036] In an optional example, the reducing section 21 is fixedly connected to the stirring shaft 10 via a supporting frame 50 .
[0037] Furthermore, the support frame 50 is a "well" shaped fixed round steel, the stirring shaft 10 is located at the center of the "well" shaped round steel and welded to the support frame 50, and the inner wall of the different diameter section 21 is welded to the four ends of the "well" shaped round steel.
[0038] Preferably, the diameter range of the reducing section 21 is DN100 to DN200.
[0039] In an optional example, an opening communicating with the annular spacer is formed on the outer wall of the diversion section 23 , a diversion pipe 24 is connected to the outside of the opening, and the medicine outlet pipe 40 is connected to the annular spacer through the diversion pipe 24 .
[0040] Furthermore, the inner diameter of the diverter pipe 24 is smaller than the inner diameter of the diverter section 23 .
[0041] Furthermore, the shunt pipe 24 is welded to the medicine outlet pipe 40 .
[0042] In an optional example, the connection method of the reducing diameter section 21, the shaft sleeve section 22 and the diverter section 23 of the cylinder body can be welding or integral casting.
[0043] In an optional example of this embodiment, the bottom end of the cylinder is fixed to the stirring shaft 10 through a mechanical seal 60. By sealing the annular space with the mechanical seal 60, it is possible to effectively prevent the medicine from leaking from the bottom of the annular space.
[0044] In an optional example of this embodiment, the cylinder is a stainless steel cylinder, and the medicine outlet pipe 40 is a stainless steel medicine outlet pipe.
[0045] In an optional example of this embodiment, the stirring shaft 10 and the stirring blade 30 can both adopt the stirring shaft and stirring blade of an existing stirring device. Only the cylinder body is installed outside the stirring shaft 10 and the medicine outlet tube 40 is installed on the stirring blade 30, which greatly saves manufacturing and maintenance costs.
[0046] In an optional embodiment of the present invention, the sedimentation tank dosing device 100 further includes a motor 70 , which is connected to the other end of the stirring shaft 10 and drives the stirring shaft 10 to rotate.
[0047] In an optional embodiment of the present invention, the medicine outlet pipe 40 extends to the outer edge of the stirring blade 30. With the above structure, the medicine outlet of the medicine outlet pipe 40 is also located at the outer edge of the stirring blade 30. When rotating, the centrifugal force generated is the largest, further avoiding blockage of the medicine outlet.
[0048] In an optional embodiment of the present invention, the medicine outlet pipe 40 is welded to the stirring blade 30 .
[0049] In an optional example of the present invention, the sedimentation tank dosing device 100 includes two stirring blades 30, and the two stirring blades 30 are symmetrically arranged on both sides of the stirring shaft 10, and the diversion section 23 and the two diversion pipes 24 are composed of a three-way pipe with a different diameter.
[0050] In an optional example of the present invention, the sedimentation tank dosing device 100 includes three stirring blades 30, and the three stirring blades 30 are evenly distributed along the circumferential direction of the stirring shaft 10. Of course, according to the needs of actual production, those skilled in the art may also provide four stirring blades 30 or more stirring blades 30.
[0051] The sedimentation tank dosing device 100 proposed by the utility model sets the drug distributor 20 and the drug outlet pipe 40 on the agitator of the sedimentation tank, and utilizes the shear force generated by the rapid rotation of the stirring blade 30 during stirring to quickly disperse the drug in the water. At the same time, the centrifugal force generated by the stirring blade 30 driving the dosing pipe to rotate effectively prevents the suspended matter in the sewage from blocking the outlet of the dosing pipe.
[0052] The sedimentation tank dosing device 100 provided by the utility model effectively improves the dosing efficiency of the sedimentation tank (especially the high-density sedimentation tank), reduces the load of the sedimentation tank, and reduces the construction cost of the high-density sedimentation tank.
[0053] The detailed explanation of the above-mentioned embodiments is only intended to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions cannot be interpreted as limitations on the present invention for any reason. In particular, the various features described in different embodiments may also be arbitrarily combined with each other to form other embodiments. Unless there is a clear description to the contrary, these features should be understood to be applicable to any embodiment and are not limited to the described embodiments.
Claims
1. A sedimentation tank dosing device, characterized in that: The sedimentation tank dosing device includes a stirring shaft, a medicine distributor, at least two stirring blades and at least two medicine outlet pipes, the medicine distributor and the at least two stirring blades are respectively arranged on the stirring shaft, at least two stirring blades are fixedly connected to one end of the stirring shaft and are evenly distributed along the circumferential direction of the stirring shaft, each stirring blade is respectively provided with at least one medicine outlet pipe, one end of the medicine outlet pipe is connected to the medicine distributor, and the other end of the medicine outlet pipe is formed with a medicine outlet.
2. The sedimentation tank dosing device according to claim 1, characterized in that: The stirring shaft is arranged vertically, and at least two stirring blades are arranged at the bottom end of the stirring shaft. The medicine distributor includes a cylinder body which is sleeved outside the stirring shaft, and an annular space is provided between the inner wall of the cylinder body and the outer wall of the stirring shaft. The top end of the annular space is open, and the bottom end of the annular space is closed. One end of the medicine outlet pipe is fixedly connected to the cylinder body and communicated with the annular space.
3. The sedimentation tank dosing device according to claim 2, characterized in that: The cylinder body includes a different diameter section, a sleeve section and a diverter section which are arranged in sequence from top to bottom. The inner wall surface of the different diameter section is a conical surface which gradually decreases in diameter from top to top. The inner wall surface of the sleeve section and the inner wall surface of the diverter section are cylindrical surfaces, and the inner diameter of the sleeve section and the inner diameter of the diverter section are equal.
4. The sedimentation tank dosing device according to claim 3, characterized in that: The different diameter section is fixedly connected to the stirring shaft via a support frame.
5. The sedimentation tank dosing device according to claim 3, characterized in that: An opening communicating with the annular spacer is formed on the outer wall of the diversion section, a diversion pipe is connected to the outside of the opening, and the medicine outlet pipe is connected to the annular spacer through the diversion pipe.
6. The sedimentation tank dosing device according to claim 5, characterized in that: The inner diameter of the diverter pipe is smaller than the inner diameter of the diverter section.
7. The sedimentation tank dosing device according to claim 2, characterized in that: The bottom end of the cylinder is fixed on the stirring shaft through a mechanical seal.
8. The sedimentation tank dosing device according to claim 2, characterized in that: The cylinder is a stainless steel cylinder, and the medicine outlet pipe is a stainless steel medicine outlet pipe.
9. The sedimentation tank dosing device according to claim 1, characterized in that: The dosing device further comprises a motor, which is connected to the other end of the stirring shaft and drives the stirring shaft to rotate.
10. The sedimentation tank dosing device according to claim 1, characterized in that: The medicine outlet pipe extends to the outer edge of the stirring blade.