Countercurrent washing flocculant feeding system

Abstract

The utility model discloses a countercurrent washing flocculant feeding system, belongs to the technical field of countercurrent washing devices, and aims to solve the problems that flocculants are not uniformly added or cannot be added in the conventional countercurrent washing device and the like. The utility model discloses a countercurrent washing flocculating agent feeding system which comprises a settling tank, a circulating pump and a circulating pump, wherein the settling tank comprises a flow stabilizing cylinder and a feeding channel; a forced dilution pump; the flocculating agent main pipe is used for injecting a flocculating agent into the flow stabilizing cylinder; all the secondary flocculant pipes are arranged on the inner circular surface of the flow stabilizing cylinder at equal intervals; the pipe diameter of the flocculating agent main pipe is larger than that of the secondary flocculating agent pipe, so that the speed of spraying the flocculating agent out of the flocculating agent main pipe and the secondary flocculating agent pipe is larger than a set value. According to the countercurrent washing flocculating agent feeding system disclosed by the utility model, the flocculating agent main pipe and the secondary flocculating agent pipe form a multi-point injection mode of a flocculating agent, so that the flocculating agent is distributed more uniformly; the flow can be more accurately controlled by reducing the pipe diameters of the flocculant main pipe and the secondary flocculant pipe, and the use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to counter-current washing device technical field especially relates to counter-current washing flocculant feeding system. BACKGROUND

[0002] Counter-current washing (CCD) or reverse washing is a kind of solid-liquid separation technology, using the specific gravity difference of solid phase in solid-liquid separation process and the impact force principle of washing liquid to material, through the continuous fluid counter-current washing to material, solid phase and liquid phase are separated, and washing efficiency and recovery rate are improved.

[0003] In order to accelerate the separation of solid phase and liquid phase, it is usually necessary to add flocculant to the material. A plurality of flocculant pipelines are arranged on the settling tank in some existing devices, and each flocculant pipeline can add flocculant into the settling tank. Through the multi-point injection mode, the flocculant is more evenly distributed, and the washing efficiency is high.

[0004] The defects of the existing device include that the amount of flocculant added needs to be realized by adjusting the opening of the valve, and the data is not accurate. The amount of flocculant added each time is small, but the flocculant pipeline is made of a relatively thick DN80 pipeline, so the opening of the valve is required to be relatively small, which easily leads to uneven addition of flocculant or inability to add flocculant. UTILITY MODEL CONTENT

[0005] The utility model aims at providing counter-current washing flocculant feeding system, solves the problem of uneven addition or inability to add flocculant in the existing counter-current washing device, and has good flocculation effect.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The counter-current washing flocculant feeding system comprises: a settling tank comprising a flow stabilizing cylinder and a feed passage connected in communication; a forced dilution pump for injecting a diluent into the feed passage, the diluent being capable of mixing with the material in the feed passage; a flocculant main pipe for injecting a flocculant into the flow stabilizing cylinder; and at least two secondary flocculant pipes, all the secondary flocculant pipes being arranged at equal intervals on the inner circular surface of the flow stabilizing cylinder; the pipe diameter of the flocculant main pipe is greater than the pipe diameter of the secondary flocculant pipes, so that the speed of the flocculant sprayed out of the flocculant main pipe and the secondary flocculant pipes is greater than a set value.

[0008] In one preferred embodiment, the flocculant main pipe and the secondary flocculant pipes are vertically arranged, and flow meters are arranged on the flocculant main pipe and the secondary flocculant pipes.

[0009] In one preferred embodiment, the countercurrent washing flocculant feeding system includes a flocculant main pipe, which is disposed in the flow stabilizer and located at the intersection of the flow stabilizer and the feed channel. The outlet end of the flocculant main pipe is located within the range of the feed channel inputting material into the flow stabilizer.

[0010] In one preferred embodiment, the countercurrent washing flocculant feeding system includes two secondary flocculant pipes, and all the secondary flocculant pipes and the main flocculant pipe are spaced apart in the flow stabilizer.

[0011] In one preferred embodiment, the spatial heights of the outlet end of the main flocculant pipe, the outlet end of one of the secondary flocculant pipes, and the outlet end of another secondary flocculant pipe increase sequentially.

[0012] In one preferred embodiment, the settling tank includes two feed channels respectively connected to the flow stabilizer, and each feed channel is connected to a forced dilution pump; the countercurrent washing flocculant feeding system includes two flocculant main pipes, and the outlet end of each flocculant main pipe is inserted into one of the feed channels and located at the outlet of the forced dilution pump.

[0013] In one preferred embodiment, the countercurrent washing flocculant feeding system includes five secondary flocculant tubes, all of which are spaced apart in the flow stabilizer.

[0014] In one preferred embodiment, with the axis of the flow stabilizer as the center, the angle difference between two adjacent secondary flocculant tubes is 60°.

[0015] In one preferred embodiment, the proportion of flocculant added gradually decreases from the main flocculant pipe to the secondary flocculant pipe.

[0016] In one preferred embodiment, the diameter of the main flocculant pipe is not less than DN80, and the diameter of the secondary flocculant pipe is not greater than DN50.

[0017] The countercurrent washing flocculant feeding system disclosed in this utility model includes a settling tank, a forced dilution pump, a main flocculant pipe, and at least two secondary flocculant pipes. The main flocculant pipe and the secondary flocculant pipes work together to form a multi-point injection mode for the flocculant, resulting in more uniform flocculant distribution. By reducing the diameter of the secondary flocculant pipes, the flow rate can be controlled more precisely, solving the technical problems of uneven or insufficient flocculant addition that often occur in existing devices, making it more convenient to use. The speed at which the flocculant is sprayed out of the main flocculant pipe and the secondary flocculant pipe is greater than the set value, allowing the flocculant to impact and inject below the liquid surface with a certain kinetic energy, improving the mixing effect between the flocculant and the internal materials, which is beneficial for flocculation. Attached Figure Description

[0018] Figure 1 is a structure schematic view of a countercurrent washing flocculant feeding system provided by the embodiment of the present application;

[0019] Figure 2 is a core component structure schematic view of a countercurrent washing flocculant feeding system provided by the embodiment of the present application;

[0020] Figure 3 is a sectional view of a countercurrent washing flocculant feeding system provided by the embodiment of the present application;

[0021] Figure 4 is a structure schematic view of another countercurrent washing flocculant feeding system provided by the embodiment of the present application;

[0022] Figure 5 is a core component structure schematic view of another countercurrent washing flocculant feeding system provided by the embodiment of the present application.

[0023] In the drawings:

[0024] 1, settling tank; 2, forced dilution pump; 3, flocculant main pipe; 4, secondary flocculant pipe; 101, steady flow cylinder; 102, feeding channel; 401, screw pump; 402, flocculant liquid supply bin; 403, flow meter. DETAILED DESCRIPTION

[0025] In order to make the above purpose, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a comprehensive understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply any relative importance or an ordering of importance. Thus, a feature defined with a "first", "second", etc. can include at least one of the features, explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0028] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0031] The present embodiment discloses a counter-flow washing flocculant feeding system, which can be used in, but not limited to, a wet smelting nickel production process, and is especially suitable for a wet smelting process of laterite nickel ore. The present embodiment is described by taking the wet smelting nickel production process as an example, but is also applicable in other industrial production.

[0032] As Figures 1 to 5As shown, the counter-flow washing flocculant feeding system comprises a settling tank 1, a forced dilution pump 2, a flocculant main pipe 3 and at least two secondary flocculant pipes 4, wherein the settling tank 1 comprises a steady flow cylinder 101 and a feeding channel 102 in communication; the outlet of the forced dilution pump 2 is communicated to the feeding channel 102 for injecting diluent into the feeding channel 102, and the diluent can be mixed with the material in the feeding channel 102; the flocculant main pipe 3 is used for injecting flocculant into the steady flow cylinder 101; and all the secondary flocculant pipes 4 are arranged equidistantly on the inner circular surface of the steady flow cylinder 101. The flocculant main pipe 3 cooperates with the secondary flocculant pipes 4 to form a multi-point injection mode of the flocculant, and the flocculant is more uniformly distributed. With proportional control, the flocculant can better promote the flocculation of the material.

[0033] At the same opening degree of the valve body, the amount of the material flowing out of the thin pipe per unit time is less, and the amount of the material flowing out of the thick pipe is more. In the embodiment, the pipe diameter of the flocculant main pipe 3 is greater than that of the secondary flocculant pipe 4, that is, the pipe diameter of part of the flocculant pipe (the secondary flocculant pipe 4) is reduced. Compared with the DN80 pipeline in the prior art, the secondary flocculant pipe 4 in the embodiment is more convenient for precise control of the flow rate, solves the technical problems of uneven or insufficient addition of flocculant often occurring in the existing device, and is more convenient to use. In order to further improve the kinetic energy impact ability of the flocculant, a screw pump 401 can be connected to a flocculant supply bin 402, and the screw pump 401 is used to pump the flocculant into the corresponding flocculant pipe. The screw pump 401 can provide pressure for the flocculant, and the pressure is converted into power, thereby improving the flow rate of the flocculant.

[0034] By reducing the pipe diameter of the secondary flocculant pipe 4 and the cooperation of the flocculant main pipe 3 and the secondary flocculant pipe 4, the speed of the flocculant sprayed out of the flocculant main pipe 3 and the secondary flocculant pipe 4 can be greater than the set value. That is, by increasing the injection flow rate of the flocculant in the flocculant main pipe 3 and the secondary flocculant pipe 4, reducing the inner diameter of the flocculant main pipe 3 and the secondary flocculant pipe 4, and keeping the opening degree of the valve body unchanged, the flow rate of the flocculant at the outlet end of the flocculant main pipe 3 and the secondary flocculant pipe 4 can be improved, so that the flocculant can impact the liquid surface below with a certain kinetic energy, and the mixing effect of the flocculant and the internal material is improved.

[0035] The specific pipe diameter of the flocculant main pipe 3 and the secondary flocculant pipe 4 is not limited, and the amount of the flocculant flowing out per unit time can be controlled under the premise of not affecting the conveying of the flocculant. In the embodiment, the pipe diameter of the flocculant main pipe 3 is not less than DN80, and the pipe diameter of the secondary flocculant pipe 4 is not greater than DN50, so that the injection of the flocculant with small flow rate can be better realized.

[0036] On the basis of the above structure, flow meters 403 are arranged on the flocculant main pipe 3 and the secondary flocculant pipe 4, and the proportion of the injected flocculant is controlled according to the reading value of the flow meter 403, so that the flocculant is added according to the proportion, and the process stability is higher.

[0037] The flocculant main pipe 3 and the secondary flocculant pipe 4 are vertically arranged, that is, the flocculant main pipe 3 and the secondary flocculant pipe 4 are vertically inserted. The injection of flocculant will disturb the material fluid to a certain extent, so that the flocculant is fully mixed with the material. If the flocculant is injected into the material in an inclined state, the disturbance force along the rotation direction of the material will be reduced, resulting in insufficient mixing. In the embodiment, the posture of the flocculant main pipe 3 and the secondary flocculant pipe 4 is vertical, which helps to mix the feed flow rate and the flocculant impact flow rate, and also avoids excessive disturbance to break the flocculant particles.

[0038] The specific number of the flocculant main pipe 3 and the secondary flocculant pipe 4 in the countercurrent washing flocculant feeding system is not limited, which can improve the accurate control of the amount of flocculant added.

[0039] As shown in Figures 1 to 3 The countercurrent washing flocculant feeding system includes a flocculant main pipe 3. The flocculant main pipe 3 is arranged in the flow stabilizing cylinder 101 and located at the intersection of the flow stabilizing cylinder 101 and the feed passage 102. The outlet end of the flocculant main pipe 3 is located in the range of the feed passage 102 inputting the material to the flow stabilizing cylinder 101. The bottom end of the flocculant main pipe 3 is inserted and extends into the bottom flow position of the outlet of the forced dilution pump 2, which is used to inject flocculant at the mixing position of the overflow in the flow stabilizing cylinder 101 and the bottom flow of the outlet of the forced dilution pump 2.

[0040] Correspondingly, the countercurrent washing flocculant feeding system includes two secondary flocculant pipes 4, and all the secondary flocculant pipes 4 and the flocculant main pipe 3 are arranged in the flow stabilizing cylinder 101. One flocculant main pipe 3 and two secondary flocculant pipes 4 form three injection points in a triangular distribution in the flow stabilizing cylinder 101, which improves the uniformity of flocculant injection. From the mixing position of the overflow in the flow stabilizing cylinder 101 and the bottom flow of the outlet of the forced dilution pump 2, one flocculant main pipe 3 and two secondary flocculant pipes 4 are added according to the distribution of the inner equilateral triangle of the central cylinder of the flow stabilizing cylinder 101, which is mainly used to improve the dilution amount in a single passage.

[0041] On the basis of the above structure, the spatial height of the outlet end of the flocculant main pipe 3, the outlet end of one secondary flocculant pipe 4 and the outlet end of the other secondary flocculant pipe 4 increases in turn. That is, one flocculant main pipe 3 and two secondary flocculant pipes 4 are inserted into the liquid surface to a certain depth, which gradually decreases from the flocculant main pipe 3 as the starting point.

[0042] The flocculant main pipe 3 is firstly contacted with the material, so the flocculant reacts with the material after the flocculant main pipe 3 is opened, and the flocculation and sedimentation are started. Then, the material enters the flow stabilizing cylinder 101, and the material in the flow stabilizing cylinder 101 is continuously in a rotating state because the material continuously enters the flow stabilizing cylinder 101 from the feeding channel 102. The flocculation gradually grows, and the flocculation of large particles rotates and sinks; the relatively small flocculation particles continue to rotate in the flow stabilizing cylinder 101. In the rotating process, the heavy particles sink to give the material an upward buoyancy, and the small particles with small gravity float upward.

[0043] The small particles float upward to reach the outlet end of the secondary flocculant pipe 4 which is slightly higher than the outlet end of the flocculant main pipe 3, and the secondary flocculant pipe 4 also injects the flocculant to continue the flocculation, so that the small particles are flocculated to increase the gravity and sink; very small particles continue to float upward. Similarly, the very small particles that float upward reach another outlet end of the secondary flocculant pipe 4, and the flocculant injected by the secondary flocculant pipe 4 flocculates the remaining very small particles to increase the gravity and sink.

[0044] In summary, the outlet ends of the flocculant main pipe 3 and the two secondary flocculant pipes 4 form a stepped shape in height, which can improve the mixing effect of the flocculant and reduce the consumption of the flocculant. The specific heights of the outlet ends of the three pipes are not limited, and in the embodiment, the insertion depth of the flocculant main pipe 3 from the upper edge of the feeding channel 102 is about 15 cm, the insertion depth of one secondary flocculant pipe 4 is about 5 cm higher than that of the flocculant main pipe 3, and the insertion depth of the other secondary flocculant pipe 4 is about 10 cm higher than that of the flocculant main pipe 3.

[0045] As shown in Figs. 1 and 2, the settling tank 1 includes two feeding channels 102 which are respectively connected with the flow stabilizing cylinder 101, and each feeding channel 102 is connected with a forced dilution pump 2. Figure 4 Figure 5 As shown in Figs. 1 and 2, the settling tank 1 includes two feeding channels 102 which are respectively connected with the flow stabilizing cylinder 101, and each feeding channel 102 is connected with a forced dilution pump 2.

[0046] Correspondingly, the countercurrent washing flocculant feeding system includes five secondary flocculant pipes 4 which are arranged in the inner circle of the flow stabilizing cylinder 101 at intervals and add the flocculant uniformly. The two flocculant main pipes 3 and the five secondary flocculant pipes 4 form a total of seven flocculant injection points, and the flocculant is added more uniformly and mixed with the material more fully.

[0047] ​The specific installation position of all secondary flocculant pipes 4 on the flow stabilizing cylinder 101 is not limited, and in the embodiment, the angle difference between adjacent two secondary flocculant pipes 4 is 60° with the axis of the flow stabilizing cylinder 101 as the center. That is, all secondary flocculant pipes 4 are arranged at equal intervals, the flocculant is more uniformly distributed in the material, the mixing effect of the flocculant and the material is good, and it is beneficial to flocculation.

[0048] On the basis of the above structure, the flocculant addition ratio gradually decreases from the flocculant main pipe 3 to the secondary flocculant pipe 4. That is, the flocculant addition ratio of two flocculant main pipes 3 and five secondary flocculant pipes 4 gradually decreases from the flocculant main pipe 3, which helps to improve the utilization efficiency of the flocculant and the mixing of the flocculant and the material is more sufficient.

[0049] The decrease range of the addition ratio can be determined according to the particle size ratio of the material. The particle size of the ore slurry has 200 mesh, 120 mesh, 80 mesh and 20 mesh, and the embodiment mainly describes the treatment of the material below 80 mesh. After the flocculant is mixed with the material, the chain increases and the gravity increases, and the self-gravity makes the flocculant sink. The remaining material gradually increases in chain and gravity during rotation, and then settles. With the increase of time, the remaining material gradually decreases, and the amount of flocculant required also decreases. Therefore, the ratio of the gradual decrease of the flocculant addition amount can be determined according to the particle size ratio of the material.

[0050] Note that the above is only a preferred embodiment of the present application and the technical principle used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A counter-current wash flocculant dosing system characterised in that, The invention relates to a counter-current washing and flocculant feeding system, comprising: a settling tank (1) comprising a flow stabilizing cylinder (101) and a feed channel (102) in communication; a forced dilution pump (2) for injecting a diluent into the feed channel (102), the diluent being capable of mixing with the material in the feed channel (102); a main flocculant pipe (3) for injecting a flocculant into the flow stabilizing cylinder (101); and at least two secondary flocculant pipes (4) arranged equidistantly on the inner circular surface of the flow stabilizing cylinder (101). The diameter of the main flocculant pipe (3) is greater than the diameter of the secondary flocculant pipes (4) so that the velocity of the flocculant ejected from the main flocculant pipe (3) and the secondary flocculant pipes (4) is greater than a set value. The main flocculant pipe (3) and the secondary flocculant pipes (4) are arranged vertically, and flow meters (403) are arranged on the main flocculant pipe (3) and the secondary flocculant pipes (4).

2. The counterflow wash flocculant dosing system of claim 1, wherein, The counter-current washing and flocculant feeding system comprises one main flocculant pipe (3) arranged in the flow stabilizing cylinder (101) at the intersection of the flow stabilizing cylinder (101) and the feed channel (102), and the outlet end of the main flocculant pipe (3) is located within the range of the feed channel (102) feeding material into the flow stabilizing cylinder (101).

3. The counterflow wash flocculant dosing system of claim 1, wherein, The counter-current washing and flocculant feeding system comprises two secondary flocculant pipes (4) arranged equidistantly in the flow stabilizing cylinder (101) with the main flocculant pipe (3).

4. The counterflow wash flocculant dosing system of claim 3, wherein, The spatial height of the outlet end of the main flocculant pipe (3), the outlet end of one secondary flocculant pipe (4), and the outlet end of another secondary flocculant pipe (4) increases in turn.

5. The counterflow wash flocculant dosing system of claim 4, wherein, The settling tank (1) comprises two feed channels (102) in communication with the flow stabilizing cylinder (101), and each feed channel (102) is connected with one forced dilution pump (2); the counter-current washing and flocculant feeding system comprises two main flocculant pipes (3), and the outlet end of each main flocculant pipe (3) is inserted into one feed channel (102) and located at the outlet of the forced dilution pump (2).

6. The counterflow wash flocculant dosing system of claim 1, wherein, The counter-current washing and flocculant feeding system comprises five secondary flocculant pipes (4) arranged equidistantly in the flow stabilizing cylinder (101).

7. The counterflow wash flocculant dosing system of claim 6, wherein, The angle difference between two adjacent secondary flocculant pipes (4) is 60° with the axis of the flow stabilizing cylinder (101) as the center.

8. The counterflow wash flocculant dosing system of claim 7, wherein, The proportion of flocculant addition gradually decreases from the main flocculant pipe (3) to the secondary flocculant pipes (4).

9. The counterflow wash flocculant dosing system of claim 7, wherein, The diameter of the main flocculant pipe (3) is not less than DN80, and the diameter of the secondary flocculant pipes (4) is not greater than DN50.

10. The counter-current wash flocculant dosing system of any one of claims 1 to 9, wherein, ​

Images