Steel rolling turbid circulating water treatment chemical injection device

Abstract

The utility model provides a steel rolling turbid circulating water treatment medicine injection device which comprises a medicine injection pipe and a medicine mixing pipe, a positive spiral belt and a negative spiral belt which are sequentially connected are arranged in the medicine mixing pipe and are spirally distributed by taking a central shaft of the medicine mixing pipe as a rotating shaft, and the edges of the positive spiral belt and the negative spiral belt are tightly attached to the inner wall of the medicine mixing pipe. Water through holes are formed in the surfaces of the positive spiral belt and the negative spiral belt, the medicine injection pipe is a straight pipe with an open upper end and a closed lower end, the medicine injection pipe is vertically fixed in the medicine mixing pipe, the upper end of the medicine injection pipe extends out of the pipe wall of the medicine mixing pipe, two medicine outlets are formed in the side wall, facing the positive spiral belt, of the medicine injection pipe, and the two medicine outlets directly face the two inlets of the positive spiral belt respectively. According to the utility model, muddy water firstly flows clockwise and then flows anticlockwise when passing through the positive and negative spiral belts, and intersects with water flow passing through the holes in the peripheries of the positive and negative spiral belts to generate streaming, so that medicaments and the muddy water are fully mixed, the dosage of the medicaments 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 turbid water treatment in iron and steel metallurgy, in particular to a drug injection device for treating turbid circulating water in steel rolling. 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 slurry treatment device. The prior art mostly involves turbid water treatment processes such as the above patents, but there is little research on the key technology of reagent injection and 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 drug injection device for treating turbid water in a steel rolling ring, comprising a drug injection pipe and a drug mixing pipe, wherein a positive spiral belt and a reverse spiral belt connected in sequence are arranged in the drug mixing pipe, the positive spiral belt and the reverse spiral belt are both distributed in a spiral shape with the central axis of the drug mixing pipe as the rotation axis, the edges of the positive and reverse spiral belts are closely attached to the inner wall of the drug mixing pipe, the surfaces of the positive and reverse spiral belts are both provided with water holes, the drug injection pipe is a straight pipe with an open upper end and a closed lower end, the drug injection pipe is vertically fixed in the drug mixing pipe, the upper end of the drug injection pipe extends out from the wall of the drug mixing pipe, a drug outlet is opened on the side wall of the drug injection pipe facing the positive spiral belt, and two drug outlets are provided, which are respectively opposite to the two inlets of the positive spiral belt.

[0005] Furthermore, the connecting parts of the forward and reverse spiral bands have the same inclination angle, and the edges of the forward and reverse spiral bands are bonded to the inner wall of the drug mixing tube.

[0006] Furthermore, the drug injection tube extends out of the drug mixing tube, and the tube wall of the drug injection tube and the tube wall of the drug mixing tube are sealed and connected.

[0007] Furthermore, the water holes are arranged close to the edges of the positive and negative spiral bands, and there are a plurality of water holes.

[0008] Furthermore, the widths of the forward and reverse spiral bands are the same as the diameter of the drug mixing tube.

[0009] The utility model has the following beneficial effects: the utility model designs a double-hole drug injection tube and a drug mixer with forward and reverse spiral belts, so that turbid water first flows in a clockwise rotation through the forward and reverse spiral belts, and then flows in a counterclockwise rotation, and intersects with the water flow through the outer openings of the forward and reverse spiral belts to produce a vortex, thereby promoting full mixing of the drug and turbid water, stabilizing the turbid water quality, reducing the amount of drug used per ton of water, and reducing the cost of turbid water purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 , an overall schematic diagram of the utility model of the steel rolling turbid ring water treatment injection device. DETAILED DESCRIPTION

[0011] 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.

[0012] 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.

[0013] like Figure 1As shown, a drug injection device for treating turbid water in steel rolling mill comprises a drug injection pipe 1 and a drug mixing pipe 2. A positive spiral belt 4 and a reverse spiral belt 5 are sequentially connected in the drug mixing pipe 2, the end of the positive spiral belt 4 and the head of the reverse spiral belt 5 are spliced, the inclination angle of the connection between the positive and reverse spiral belts is the same, so that the transition is smooth, the positive spiral belt 4 and the reverse spiral belt 5 are both distributed in a spiral shape with the central axis of the drug mixing pipe 2 as the rotation center, the width of the positive and reverse spiral belts is the same as the diameter of the drug mixing pipe 2, the edges of the positive and reverse spiral belts are close to the inner wall of the drug mixing pipe 2, and are coated with sealant, the surfaces of the positive and reverse spiral belts are provided with water holes 6, and a plurality of water holes 6 are provided along the edges of the positive and reverse spiral belts.

[0014] The injection tube 1 is a straight tube with an open upper end and a closed lower end. The injection tube 1 is vertically fixed in the mixing tube 2. The upper end of the injection tube 1 extends out from the wall of the mixing tube 2. At the extending portion, a sealant is applied between the wall of the injection tube 1 and the wall of the mixing tube 2. A drug outlet 3 is provided on the side wall of the injection tube 1 facing the positive spiral belt. There are two drug outlets 3, which are respectively opposite to the two entrances of the positive spiral belt 4.

[0015] After the medicine enters the injection tube 1, it flows out from the two medicine outlets 3 and enters the spiral channel from the two entrances of the positive spiral belt 4 respectively. From the shape-following characteristics of the fluid flow, it can be seen that the turbid water rotates forward clockwise after passing through the positive spiral belt 4, which promotes the mixing of the medicine and the turbid water, and then enters the reverse spiral belt 5. At this time, the turbid water flowing clockwise rotates in the opposite direction, which further promotes the mixing of the medicine and the turbid water. At the same time, the turbid water passing through the water holes 6 of the positive and reverse spiral belts intersects with the rotating turbid water to produce a vortex, which again promotes the mixing of the medicine and the turbid water.

[0016] CFD simulation calculation was carried out on the steel rolling turbid water treatment injection device of the utility model. A cross section was taken from the water pipe section passing through the device. The calculated agent distribution uniformity index on the cross section was 0.98, and the mixing effect was improved by more than double, which is far better than the existing technical solutions of the rolling mill.

[0017] Other parts of the present invention not described in detail belong to the prior art and will not be described in detail here.

[0018] 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 device for injecting medicine to treat turbid water in steel rolling mill, characterized in that: Including injection tube and mixing tube, The medicine mixing tube is provided with a positive spiral belt and a reverse spiral belt connected in sequence, the positive spiral belt and the reverse spiral belt are both spirally distributed with the central axis of the medicine mixing tube as the rotation axis, the edges of the positive and reverse spiral belts are closely attached to the inner wall of the medicine mixing tube, and the surfaces of the positive and reverse spiral belts are provided with water holes, The injection tube is a straight tube with an open upper end and a closed lower end. The injection tube is vertically fixed in the mixing tube. The upper end of the injection tube extends out from the wall of the mixing tube. A drug outlet is provided on the side wall of the injection tube facing the positive spiral belt. There are two drug outlets, which are respectively opposite to the two entrances of the positive spiral belt.

2. The device for treating and injecting medicine in turbid water of steel rolling mill according to claim 1 is characterized in that: The connecting parts of the positive and negative spiral bands have the same inclination angle, and the edges of the positive and negative spiral bands are bonded to the inner wall of the drug mixing tube.

3. The device for treating and injecting medicine in turbid water of steel rolling mill according to claim 1, characterized in that: The drug injection tube extends out of the drug mixing tube, and the tube wall of the drug injection tube is sealed and connected with the tube wall of the drug mixing tube.

4. The device for treating and injecting medicine in turbid water of steel rolling according to claim 1, characterized in that: The water through hole is arranged close to the edges of the positive and negative spiral belts, and a plurality of the water through holes are provided.

5. The device for treating and injecting medicine in turbid water of steel rolling according to claim 1, characterized in that: The widths of the forward and reverse spiral bands are the same as the diameter of the drug mixing tube.

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