Flocculating agent secondary diluting and adding device of thickener

Abstract

The utility model relates to a flocculating agent secondary diluting and adding device of a thickener. The flocculating agent secondary diluting and adding device comprises a central distributing cylinder, a feeding pipe, a flocculating agent diluting water inlet, a flocculating agent stock solution inlet, a pipeline mixer, a flocculating agent diluted liquid pipe, a flocculating agent dosing valve, a flocculating agent dosing hose, a flocculating agent dosing liquid inlet pipe and a liquid receiving funnel, the feeding pipe is mounted on the side wall of the central material distribution cylinder, and the flocculating agent dosing and liquid inlet pipe is welded on the feeding pipe to form a whole; according to the utility model, the prepared flocculant stock solution is secondarily diluted in the pipeline mixer, so that the volume of the diluted flocculant is increased, the concentration of the diluted flocculant is reduced, the secondary diluent of the flocculant and the material are mixed more sufficiently, the flocculating settling of the fine-fraction material is facilitated, the running and mixing risk is reduced, and the overflow clarity is improved. The concentration of the secondary diluent of the flocculant is low, the addition amount of the flocculant can be more accurately adjusted according to the clarification effect, and the consumption of the flocculant is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the flocculation dosing technical field of thickener, specifically relates to a flocculating agent secondary dilution adding device of thickener. BACKGROUND

[0002] Thickener is a solid-liquid separation equipment based on gravity settling and is widely used, and is often used in chemical industry, sewage treatment, coal, steel, non-ferrous smelting and mineral processing industry. In order to accelerate the sedimentation of fine particle material and suspended particles, the thickener is often matched with a flocculating agent preparation and adding device. The common flocculating agent adding mode of the thickener is to directly add the prepared flocculating agent stock solution to the feeding degassing barrel of the thickener or to add in the center feeding cylinder of the thickener. When adding in the feeding degassing cylinder or the center feeding cylinder, the volume of the flocculating agent stock solution is small, and the mixing with the material is not sufficient, which affects the full occurrence of flocculation. If the feeding degassing cylinder is a dynamic stirring with paddles, the formed flocculation groups can be dispersed, and the flocculation and sedimentation effect is reduced. In order to reduce the probability of running mixture of the thickener and improve the clarity of the overflow clear liquid, the production practice often uses the mode of adding the flocculating agent in proper excess to improve the sedimentation performance, thereby increasing the cost of the flocculating agent. SUMMARY

[0003] The utility model overcomes the deficiency of the prior flocculating agent adding device and provides a flocculating agent secondary dilution adding device of thickener.

[0004] In order to solve the above technical problems, the utility model provides a flocculating agent secondary dilution adding device of thickener, characterized by comprising a center feeding cylinder (1), a feeding pipe (2), a pipeline mixer (5) and a flocculating agent diluted liquid pipe (6); the feeding pipe (2) is installed on the center feeding cylinder (1), the feeding pipe (2) is fixed with a flocculating agent dosing liquid inlet pipe (10), the flocculating agent dosing liquid inlet pipe (10) is fixed with a flocculating agent dosing hose (8); one end of the pipeline mixer (5) is connected with the flocculating agent diluted liquid pipe (6), and the other end is connected with a flocculating agent dilution water inlet (3) and a flocculating agent stock solution inlet (4) respectively; the flocculating agent diluted liquid pipe (6) is connected with a flocculating agent dosing valve (7) and a flocculating agent dosing hose (8) through the opening below.

[0005] Beneficial effects: the prepared flocculant stock solution is diluted twice in the pipeline mixer, the volume of the diluted flocculant liquid is increased, the concentration is reduced, the flocculant secondary dilution liquid and the material are mixed more fully, the flocculation and settlement of the fine particle material are facilitated, the risk of running and mixing is reduced, and the overflow clarity is improved. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 A flocculant secondary dilution adding device of a thickener

[0007] Figure 2 A partial sectional view of a flocculant secondary dilution adding device of a thickener. DETAILED DESCRIPTION

[0008] In order to make the purpose, content and advantages of the utility model more clear, the specific implementation of the utility model is described in further detail below.

[0009] The utility model discloses a flocculant secondary dilution adding device of a thickener, and its characterized in that: including center cloth cylinder (1), feed pipe (2), flocculant dilution water import (3), flocculant stock solution import (4), pipeline mixer (5), flocculant dilution liquid pipe (6), flocculant dosing valve (7), flocculant dosing hose (8), clamp (9), flocculant dosing liquid inlet pipe (10) and liquid receiving funnel (11);

[0010] Feed pipe (2) is installed on the lateral wall of center cloth cylinder (1) along the tangential direction of the circumference, and flocculant dosing liquid inlet pipe (10) is welded on feed pipe (2) to form a whole; clamp (9) fixes flocculant dosing hose (8) on flocculant dosing liquid inlet pipe (10), one end of pipeline mixer (5) is connected with flocculant dilution liquid pipe (6), the axial direction of the other end is connected with flocculant dilution water import (3), and the radial direction is connected with flocculant stock solution import (4); flocculant dilution liquid pipe (6) is provided with flocculant dosing valve (7) below the opening, and liquid receiving funnel (11) is arranged between flocculant dosing valve (7) and flocculant dosing hose (8), so that the flocculant addition amount can be observed, and the diluted flocculant liquid can be prevented from overflowing.

[0011] Further, the prepared flocculant stock solution has a mass concentration of 1 ‰-5 ‰, is fed by a variable frequency screw pump, and the flow rate is adjustable.

[0012] Further, the flocculant dilution water is 10-50 times the amount of the flocculant stock solution, so that the volume of the diluted flocculant liquid is increased, the concentration is reduced, the contact range with the material is increased, and the flocculant can play a more sufficient role. The flocculant dilution water is process water or overflow water of the thickener itself, is fed by a variable frequency pump, and the amount of the dilution water is adjustable.

[0013] Further, the pipeline mixer has a metal baffle grid, so that the flocculant dilution water and the flocculant stock solution are fully diluted and mixed.

[0014] Further, the flocculant feeding hose is a steel wire lined wear-resistant hose, and the hose outlet is near the center of the feeding pipe, so that the flocculant dilution liquid is mixed more fully in the feeding pipe under the action of the mixing flow of the material.

[0015] Further, the flocculant feeding hose is fixed by a clamp, which is convenient for disassembly and replacement after wear.

[0016] Further, a plurality of flocculant feeding valves are arranged to realize multi-point feeding of the flocculant. By adjusting the opening position of the feeding valve, the flocculation mixing time can be adjusted. According to the material characteristics, if the flocculation reaction time is short, the feeding valve near the center of the feeding pipe is preferentially opened to feed the flocculant; if the flocculation reaction time is long, the flocculant feeding valve outside the center of the feeding pipe is preferentially opened to feed the flocculant.

[0017] The device is implemented as follows:

[0018] S1: The prepared flocculant stock solution with a mass concentration of 1 ‰-5 ‰ is fed into the pipeline mixer by a variable frequency screw pump, and is fully diluted and mixed with flocculant dilution water. The flocculant dilution water is process water or overflow water of the thickener itself, which is fed by a variable frequency pump, and the amount of dilution water can be adjusted.

[0019] S2: The flocculant dilution liquid after dilution and mixing is fed into the feeding pipe by the flocculant feeding valve through the flocculant feeding hose, and fully mixes with the material flow in the feeding pipe to occur flocculation.

[0020] S3: The material flow forming flocculation groups is passed into the center feeding cylinder for sedimentation, the underflow is the thickened material flow, and the overflow is the supernatant.

[0021] Example 1

[0022] A copper-cobalt ore dressing project has a design ore handling capacity of 130 wt / a, and its tailings thickener is a 25 m high-efficiency thickener, and the design flocculant is added from a single point in the feeding degassing cylinder. After the project is put into production, the tailings thickener has a large number of suspended particles in the supernatant, the overflow liquid is turbid, the solid content is detected to be >400 ppm, and increasing the amount of flocculant added does not significantly improve the effect. At the same time, the unit consumption of flocculant is >40 g / t. dry ore, and the consumption is large. By changing the flocculant addition point to the center of the feeding cylinder, the sedimentation performance is not significantly improved.

[0023] Through technical transformation, the flocculant secondary dilution adding device is used, the flocculant stock solution (preparation concentration 1.5‰-2.5‰) is diluted twice and is added to the feed pipe in multiple points, the ore pulp sedimentation performance is obviously improved, the supernatant overflow solid content is reduced to <150ppm, and the flocculant unit consumption is reduced to <20g / t dry ore, and the beneficial effect is remarkable.

[0024] The above only is the preferred embodiment of the utility model, should point out, for the ordinary skilled person in the prior art, on the premise of not departing from the technical principle of the utility model, can make a number of improvements and deformation, these improvements and deformation also should be regarded as the protection scope of the utility model.

Claims

1. A flocculant secondary dilution adding device of a thickener, characterized by: It comprises a center cloth cylinder (1), a feeding pipe (2), a pipe mixer (5) and a flocculant dilution pipe (6); the feeding pipe (2) is installed on the center cloth cylinder (1), a flocculant feeding inlet pipe (10) is fixed on the feeding pipe (2), a flocculant feeding hose (8) is fixed on the flocculant feeding inlet pipe (10); one end of the pipe mixer (5) is connected with the flocculant dilution pipe (6), and the other end is respectively connected with a flocculant dilution water inlet (3) and a flocculant stock solution inlet (4); the flocculant dilution pipe (6) is connected with the flocculant feeding valve (7) and the flocculant feeding hose (8) through an opening below the flocculant dilution pipe (6).

2. The device for secondary dilution of flocculant for a thickener according to claim 1, characterized in that: The feeding pipe (2) is tangentially installed on the side wall of the center cloth cylinder (1) along the circumference.

3. The device for secondary dilution of flocculant for a thickener according to claim 1, characterized in that: The flocculant feeding hose (8) is fixed on the flocculant feeding inlet pipe (10) through a clamp (9).

4. The device for secondary dilution of flocculant for a thickener according to claim 1, characterized in that: The other end of the pipe mixer (5) is connected with the flocculant dilution water inlet (3) in the axial direction and connected with the flocculant stock solution inlet (4) in the radial direction.

5. The device for secondary dilution of flocculant for a thickener according to claim 1, characterized in that: A liquid receiving funnel (11) is arranged between the flocculant feeding valve (7) and the flocculant feeding hose (8).

6. The device for secondary dilution of flocculant for a thickener according to claim 1, characterized in that: The flocculant stock solution has a mass concentration of 1‰-5‰ and is fed by a variable frequency screw pump.

7. The device for secondary dilution of flocculant for a thickener according to claim 1, characterized in that: The amount of the flocculant dilution water is 10-50 times that of the flocculant stock solution.

8. The device for secondary dilution of flocculant for a thickener according to claim 1, characterized in that: There is a metal baffle grid in the pipe mixer.

9. The device for secondary dilution of flocculant for a thickener according to claim 1, characterized in that: The flocculant feeding hose is a wear-resistant hose lined with steel wire.

10. A device for secondary dilution of a flocculant for a thickener according to any one of claims 1 to 9, characterized in that: A plurality of flocculant feeding valves are arranged.

Images