Steel rolling turbid circulating water chemical injection device

Abstract

The utility model provides a steel rolling turbid circulating water medicine injection device which comprises a medicine injection pipe and a medicine mixing pipe, the medicine injection pipe comprises a circular ring pipe and a branch pipe used for injecting medicine, a plurality of medicine injection holes are evenly formed in the side wall of the backwater side of the circular ring pipe, the circular ring pipe is arranged in the medicine mixing pipe and fixed through supporting legs, and the branch pipe penetrates through the medicine mixing pipe and is fixedly connected to the outer wall of the circular ring pipe. Blades, a core shaft and an outer sleeve are arranged in the medicine mixing pipe, the axis of the core shaft coincides with the axis of the medicine mixing pipe, a plurality of water through holes are formed in the core shaft in the axial direction, a plurality of blades are arranged on the surface of the core shaft in the circumferential direction, a plurality of water through holes are formed in the surfaces of the blades, and the roots of the blades are connected with the core shaft; the edges of the blades are fixedly connected with the inner wall of the outer sleeve which is fixedly connected with the inner wall of the medicine mixing pipe. According to the device, the medicament and muddy water can be fully mixed to a great extent, the quality of the muddy water is stabilized, the dosage of the medicament per ton of water is reduced, and the purification cost of the muddy water is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of iron and steel metallurgy, in particular to a steel rolling turbid ring water injection device. Background Art

[0002] In the steel rolling production process, a large amount of waste water is generated. The cooling water comes into contact with dirt on the surface of equipment and products. Not only does the water temperature rise after use, but the waste water mainly contains iron oxide scale produced on the surface of spray cooling rolling mill rolls and rolled steel, oil substances on mechanical equipment, solid impurities and other wastes and sludge. The so-called treatment of turbid circulating water in hot rolling mills refers to this part of water. Chinese utility model CN ​​213950844 U discloses a continuous casting turbid water treatment system, including a cyclone sedimentation tank arranged along the water flow direction and connected in sequence through a pipeline, a closed pressurized turbid water purifier, a closed pressurized double cyclone filter, a cooling tower and a cold water tank; the turbid water purifier includes a mixing tank and a treatment tank connected in sequence through a pipeline along the water flow direction, and the upstream of the mixing tank is connected to a dosing device leading to it; a lifting pump is provided on the pipeline from the cyclone sedimentation tank to the mixing tank; the cold water tank is connected to a backwash pipeline leading to the double cyclone filter, and a backwash pump is provided on the backwash pipeline; the cold water tank is connected to a water supply pipeline for supplying water to users, and a water supply pump is provided on the water supply pipeline; the treatment tank of the turbid water purifier and the double cyclone filter are connected to a mud treatment device. As described in the above patent, the prior art mostly involves turbid water treatment processes, but there is little research on the key technology of reagent mixing, and the problems of unstable turbid water quality, large amount of reagents per ton of water, and high cost of turbid water purification caused by uneven reagent mixing need to be solved urgently. Summary of the invention

[0003] The technical problem solved by the utility model is that during the purification process of turbid water in the water system of the iron and steel metallurgical industry, uneven mixing of reagents leads to unstable turbid water quality, large dosage of reagents per ton of water and high cost of turbid water purification.

[0004] The utility model provides a steel rolling turbid ring water injection device, comprising an injection pipe and a mixing pipe, the injection pipe comprising a circular ring pipe and a branch pipe for injecting medicine, the side wall of the circular ring pipe on the back water side is evenly provided with a plurality of injection holes, the circular ring pipe is arranged in the mixing pipe and is fixed by a supporting foot, the branch pipe passes through the mixing pipe and is fixedly connected with the circular ring pipe, the branch pipe is communicated with the inside of the circular ring pipe, blades, a core shaft and an outer sleeve are arranged in the mixing pipe, the axis of the core shaft coincides with the axis of the mixing pipe, a plurality of first water through holes are opened in the axial direction of the core shaft, a plurality of blades are arranged circumferentially on the surface of the core shaft, a plurality of second water through holes are arranged on the surface of the blades, the roots of the blades are connected to the core shaft, the edges of the blades are fixedly connected to the inner walls of the outer sleeve, and the outer sleeve is fixedly connected to the inner wall of the mixing pipe.

[0005] Furthermore, the blades are strip-shaped and twisted around their own axes, and the inclination directions of the blades are the same.

[0006] Furthermore, the center of the circular tube coincides with the axis of the medicine mixing tube, and three supporting legs are provided, and the three supporting legs and the branch pipes divide the circular tube into four equal parts.

[0007] Furthermore, a sealant is provided at the connection between the branch pipe and the drug mixing pipe.

[0008] Furthermore, the second water hole is arranged close to the edge of the blade.

[0009] Furthermore, the number of the injection holes is no less than 6.

[0010] The utility model has the following beneficial effects: the utility model designs the blade and core shaft combination in the circular injection tube and the mixing tube, so that the turbid water rotates and flows after passing through the blade core shaft combination, and intersects with the water flow through the outer openings of the blades to generate a vortex, which greatly promotes the full mixing of the agent and the turbid water, stabilizes the turbid water quality, reduces the amount of agent used per ton of water, and reduces the cost of turbid water purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 , Schematic diagram of the utility model steel rolling turbid ring water injection device. DETAILED DESCRIPTION

[0012] In order to clearly illustrate the technical features of this solution, the solution is described below through specific implementation methods and in combination with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the utility model.

[0013] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0014] like Figure 1As shown, a turbid water injection device for steel rolling includes an injection pipe and a mixing pipe 5. The injection pipe includes a circular pipe 1 and a branch pipe 2 for injecting medicine, the side wall of the circular pipe 1 on the back side of the water is provided with a plurality of injection holes 4, the plurality of injection holes 4 are evenly arranged, the circular pipe 1 is arranged in the mixing pipe 5, located at the turbid water inlet end of the mixing pipe 5, the center of the circular pipe 1 is located on the axis of the mixing pipe 5, the outer wall of the circular pipe 1 and the inner wall of the mixing pipe 5 are fixed by three supporting legs 3, the branch pipe 2 passes through the mixing pipe 5 and is arranged on the outer wall of the circular pipe 1, the connection between the branch pipe 2 and the mixing pipe 5 is coated with sealant, the branch pipe 2 is connected with the inside of the circular pipe 1, and the three supporting legs 3 and the branch pipe 2 divide the circular pipe 1 into four equal parts.

[0015] Blades 7, a core shaft 6 and an outer sleeve 8 are provided in the mixing tube 5 near the turbid water outlet end. The axis of the core shaft 6 coincides with the axis of the mixing tube 5. The core shaft 6 is provided with a plurality of first water holes 10 along the axial direction. A plurality of blades 7 are evenly arranged along the circumferential direction on the surface of the core shaft 6. The inclination directions of the plurality of blades 7 are the same. The blades 7 are strip-shaped and twisted around their own axes. A plurality of second water holes 9 are provided on the surface of the blades 7. The second water holes 9 are arranged near the edge of the blades 7. The root of the blades 7 is connected to the core shaft 6. The edge of the blades 7 is fixed to the inner wall of the outer sleeve 8. The outer sleeve 8 is fixedly bonded to the inner wall of the mixing tube 5.

[0016] In this embodiment, there are no less than 6 injection holes 4. After the medicine enters the annular tube 1 through the branch pipe 2, it flows out from the several injection holes 4 on the annular tube 1 and disperses into the turbid water from the space. The flow direction of the turbid water is as follows: Figure 1 As shown by the middle arrow, the agent rotates and flows after passing through the blade 7 with the water flow, so that the agent and the turbid water are fully mixed. At the same time, the first water hole 10 opened axially along the core shaft 6, on the one hand, reduces the total flow area of ​​the blade 7 and reduces the fluid resistance. On the other hand, the turbid water passing through the first water hole 10 and the turbid water rotating after passing through the blade 7 intersect to produce vortex, which further promotes the mixing of the agent and the turbid water. Furthermore, part of the turbid water carries the agent through the second water hole 9 on the edge of the blade, which further improves the uniformity of the mixing of the agent in space.

[0017] CFD simulation calculation was carried out on the steel rolling turbid ring water injection device of the utility model. A cross section was taken on the water pipe section passing through the device, and the reagent distribution uniformity index on the cross section was calculated to be 0.76. Compared with the reagent distribution uniformity index of 0.51 measured by the original device of our factory, the steel rolling turbid ring water injection device of the utility model improved the reagent mixing uniformity by nearly half.

[0018] Other parts of the present invention not described in detail belong to the prior art and will not be described in detail here.

[0019] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A steel rolling turbid ring water injection device, characterized in that: Including injection tube and mixing tube, The injection pipe comprises a circular ring pipe and a branch pipe for injecting medicine, a plurality of injection holes are evenly arranged on the side wall of the circular ring pipe on the back side of the water, the circular ring pipe is arranged in the medicine mixing pipe and fixed by a supporting foot, the branch pipe passes through the medicine mixing pipe and is fixedly connected with the circular ring pipe, and the branch pipe is communicated with the inside of the circular ring pipe. The mixing tube is provided with blades, a core shaft and an outer sleeve, the axis of the core shaft coincides with the axis of the mixing tube, the core shaft is provided with a plurality of first water holes along the axial direction, a plurality of blades are arranged circumferentially on the surface of the core shaft, a plurality of second water holes are arranged on the surface of the blades, the roots of the blades are connected to the core shaft, the edges of the blades are fixedly connected to the inner wall of the outer sleeve, and the outer sleeve is fixedly connected to the inner wall of the mixing tube.

2. The steel rolling turbid ring water injection device according to claim 1 is characterized in that: The blades are strip-shaped and twisted around their own axes, and the inclination directions of the blades are the same.

3. The steel rolling turbid ring water injection device according to claim 1 is characterized in that: The center of the circular tube coincides with the axis of the medicine mixing tube, and three supporting feet are provided. The three supporting feet and the branch pipe divide the circular tube into four equal parts.

4. The steel rolling turbid ring water injection device according to claim 1 is characterized in that: A sealant is provided at the connection between the branch pipe and the drug mixing pipe.

5. The steel rolling turbid ring water injection device according to claim 1 is characterized in that: The second water hole is arranged close to the edge of the blade.

6. The steel rolling turbid ring water injection device according to claim 1 is characterized in that: The number of the injection holes is no less than 6.

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