A systematized auxiliary dispersion and addition device for a flow delivery system

Abstract

This invention provides a chemical additive dispersion and addition device for a flow conveying system, which solves the problem of uneven mixing of additives and slurry. It includes a main slurry pipe connected to a chemical additive device. The main slurry pipe is connected to the chemical additive device via a branch pipe and a high-pressure pump. A check valve is installed between the chemical additive device and the main slurry pipe, and the chemical additive device is connected to a pressure regulating component. This invention has advantages such as good additive mixing effect and resistance to clogging.

Description

Technical Field

[0001] This utility model belongs to the field of paper machine production and processing technology, specifically relating to a flow conveying system auxiliary dispersion and addition device. Background Technology

[0002] In paper machine production, process and functional additives, such as dyes, retention aids, and filter aids, are added to the feed system as needed. In conventional paper machine configurations, pre-diluted additives are often added to the pulp tubes at one or more points via pipelines. The drawback is that if the additives are not completely dissolved and dispersed, small clumps of additives may enter the wire section, causing paper defects and breaks. This is particularly noticeable in low-grammage, high-speed paper machines. The causes of these breaks are often subtle and cause difficulties in production operations and analysis.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses an auxiliary material adding device and mixing equipment [201621403899.2], which includes a buffer pipe, a feeding funnel, a bulk material component, and a vacuum extraction device; one end of the buffer pipe is connected to a reaction vessel, and the other end of the buffer pipe is connected to the vacuum extraction device; the feeding funnel includes a cylindrical feeding body, a first inlet, and a first outlet; the bulk material component has a conical surface, the edge of which is connected to the inner wall of the feeding body through a connecting component, dividing the feeding body into a first chamber and a second chamber; the conical surface of the bulk material component has a set of discharge holes for connecting the first chamber and the second chamber; the outlet of the feeding funnel is connected to the buffer pipe.

[0004] The above solution has solved the problem of adding auxiliary materials to a certain extent, but it still has many shortcomings, such as uneven mixing of auxiliary materials and slurry. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a rationally designed, standardized auxiliary dispersion and addition device for a conveying system that ensures uniform mixing of auxiliary materials and slurry.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The chemical auxiliary dispersion and addition equipment of this flow conveying system includes a main slurry pipe, the main slurry pipe is connected to a chemical auxiliary addition device, the main slurry pipe is connected to the chemical auxiliary addition device through a diversion pipe and a high-pressure pump, a check valve is installed between the chemical auxiliary addition device and the main slurry pipe, and the chemical auxiliary addition device is connected to a pressure regulating component.

[0007] In the aforementioned flow system chemical auxiliary dispersion and addition equipment, the chemical auxiliary addition device includes a cone tube, an inlet pipe connected to a diversion pipe is provided on the upper side of the cone tube, a feed inlet is provided at the top of the cone tube, and a flow guiding component is provided inside the cone tube opposite to the inlet pipe and the feed inlet.

[0008] In the aforementioned automated dispersion and addition equipment for a flow conveying system, the flow guiding component includes a flow guiding ring installed at the top of a cone tube. The flow guiding ring is hollow inside and communicates with the slurry inlet pipe. Flow guiding holes are arranged circumferentially at the lower end of the flow guiding ring. Flow guiding plates in a spiral shape are provided on the inner side of the cone tube, opposite to the flow guiding holes. A baffle plate is installed inside the cone tube between the flow guiding holes and the flow guiding plates. A shut-off valve is installed at the feed inlet opposite to the baffle plate.

[0009] In the above-mentioned automated dispersion and addition equipment for a flow conveying system, a stirring motor is installed at the upper end of the cone tube. The output end of the stirring motor extends into the interior of the cone tube and has several triangular stirring blades. The stirring blades and the baffle plate are integrally formed.

[0010] In the aforementioned automated dispersion and addition equipment for a flow conveying system, a negative pressure pipe is connected to the top of the cone tube, and the negative pressure pipe is connected to a negative pressure pump and equipped with a one-way valve.

[0011] In the aforementioned automated dispersion and addition equipment for a flow conveying system, the inlet is connected to an independent feed pipe.

[0012] In the aforementioned chemical auxiliary dispersion and addition equipment of a flow delivery system, the pressure regulating component includes a flow regulating component and a pressure sensor installed between the chemical auxiliary addition device and the main slurry pipe. Pressure sensors are installed in the branch pipe and the main slurry pipe respectively.

[0013] In the aforementioned automated distribution and addition equipment for a flow conveying system, the throughput adjustment component includes an adjustment valve body. Several valve plates arranged in a centrally symmetrical manner are movably installed inside the adjustment valve body. An adjustment gear ring is rotatably installed inside the adjustment valve body. The adjustment gear ring meshes with an adjustment motor for transmission. Several linkage grooves corresponding one-to-one with the valve plates are opened on the adjustment gear ring. The linkage blocks on the valve plates are slidably connected to the linkage grooves. The valve plates slide and open and close synchronously with the rotation of the adjustment gear ring.

[0014] In the aforementioned automated dispersion and addition equipment for a flow delivery system, a distribution valve is installed between the branch pipe and the main slurry pipe.

[0015] In the aforementioned automated distribution and addition equipment for a flow conveying system, the diversion pipe is connected to a pressure relief pipe via a pressure relief valve.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: the chemical additive device mixes the slurry with the additives, and the pressure regulating component ensures the stability of the injection, thereby improving the final mixing uniformity; the flow guiding component has a built-in stirring structure, which guides the slurry to be fed evenly while the additives are being mixed, avoiding injection blockage or leakage; the flow rate regulating component can adapt to different flow rate feeding systems, improving equipment compatibility. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the chemical additive device of this utility model;

[0019] Figure 3 This is a structural cross-sectional view of the chemical additive device of this utility model;

[0020] Figure 4 This is a structural schematic diagram of the voltage regulating component of this utility model;

[0021] In the diagram, the components are: main slurry pipe 1, chemical additive device 2, cone pipe 21, slurry inlet pipe 22, feed inlet 23, guide ring 24, guide hole 25, guide vane 26, baffle vane 27, shut-off valve 28, diverter pipe 3, high-pressure pump 4, check valve 5, pressure regulating assembly 6, regulating valve body 61, valve plate 62, regulating toothed ring 63, regulating motor 64, linkage groove 65, linkage block 66, stirring motor 7, stirring blade 71, negative pressure pipe 72, one-way valve 73, feed pipe 74, distribution valve 8, pressure relief valve 81, and pressure relief pipe 82. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-4 As shown, a chemical additive dispersion and addition device for a flow delivery system includes a main slurry pipe 1, which serves as the main pipeline for slurry transportation and is connected to a chemical additive device 2 for adding and dispersing chemical additives. The main slurry pipe 1 is connected to the chemical additive device 2 via a branch pipe 3 and a high-pressure pump 4 that provides the power for transportation, forming a complete additive addition cycle. To ensure system safety and prevent backflow of slurry or additives, a check valve 5 is installed on the return pipeline between the chemical additive device 2 and the main slurry pipe 1. In addition, to achieve precise control of the system pressure, the chemical additive device 2 is also connected to a pressure regulating assembly 6.

[0024] Specifically, the core component of the chemical additive device 2 is a conical tube 21. Its conical structure facilitates turbulence and enhances the mixing effect. An inlet pipe 22, connected to the diversion pipe 3, is located on the upper side of the conical tube 21 for introducing high-pressure slurry. An inlet port 23 for adding solid or liquid chemical additives is located at the center of the top of the conical tube 21. Inside the conical tube 21, a flow guiding component is installed opposite to the inlet pipe 22 and the inlet port 23 to optimize material distribution and initial mixing.

[0025] Specifically, the flow guiding assembly includes an annular cavity—a flow guiding ring 24—fixed at the top of the cone tube 21. The flow guiding ring 24 is hollow and its cavity is directly connected to the slurry inlet pipe 22 to receive the diverted slurry. Several flow guiding holes 25 are evenly arranged circumferentially at the lower end of the flow guiding ring 24, allowing the slurry to be sprayed downwards uniformly. To impart tangential velocity to the slurry and create a rotating flow field, spiral flow guiding vanes 26 are provided on the inner wall of the cone tube 21, opposite to the outflow direction of these flow guiding holes 25. To further improve dispersion efficiency, a baffle plate 27 is also installed inside the cone tube 21, located downstream of the outflow of the flow guiding holes 25 and upstream of the spiral flow guiding vanes 26. Its function is to collide with the high-speed jet, further breaking up agglomerates and generating strong shear. The outlet of the feed inlet 23 faces the flow-facing surface of the baffle 27 to ensure that the auxiliary material enters the high-shear zone directly, and a shut-off valve 28 for controlling the opening and closing of the feed is installed on the feed inlet 23 pipe.

[0026] Furthermore, to handle high-viscosity or easily settling additives, an additional stirring motor 7 is installed at the upper end of the cone tube 21. The output shaft of the stirring motor 7 extends vertically downward into the interior of the cone tube 21, and its end is equipped with several triangular-shaped powerful stirring blades 71. These stirring blades 71 are integrally formed with the aforementioned baffle plate 27, so that mechanical stirring and hydraulic shearing work together to greatly enhance the dispersion and dissolution effect of chemical additives in the slurry.

[0027] Furthermore, to prevent dust from flying or clogging during the addition of powdered auxiliary materials and to assist in feeding, a negative pressure pipe 72 is connected to the top of the cone tube 21. The negative pressure pipe 72 is connected to an external negative pressure pump, which can create a negative pressure in a micro-area in the upper part of the cone tube. The pipe is also equipped with a one-way valve 73 that only allows gas to be extracted, preventing liquid or slurry from being drawn back into the vacuum system.

[0028] In addition, to facilitate connection to independent powder conveying equipment or liquid metering pumps, the inlet 23 is usually connected to an independent feed pipe 74.

[0029] Meanwhile, the pressure regulating component 6 used to maintain stable system pressure consists of two main parts: one is a flow regulating component installed on the return flow line from the chemical auxiliary additive device 2 to the main slurry pipe 1, used to dynamically adjust the return flow rate; the other is a pressure sensor for real-time monitoring. To achieve precise control, pressure sensors are installed at the starting end of the branch pipe 3 and near the return point of the chemical auxiliary additive device 2 on the main slurry pipe 1, respectively, to provide pressure feedback signals to the system.

[0030] As can be seen, the core of the flux control component is a regulating valve body 61. Several valve plates 62, arranged in a centrally symmetrical manner, are movably mounted inside the valve body 61, changing the cross-sectional area of ​​the flow channel through synchronous opening and closing. An regulating gear ring 63 is also rotatably mounted inside the valve body 61. This regulating gear ring 63 meshes with the output gear of a regulating motor 64 driven by the control system to achieve transmission. Several curved linkage grooves 65, corresponding one-to-one with the valve plates 62, are formed on the end face of the regulating gear ring 63. A linkage block 66 on each valve plate 62 is embedded in the corresponding linkage groove 65, forming a sliding connection. Therefore, when the regulating motor 64 drives the regulating gear ring 63 to rotate, through the cooperation of the linkage grooves 65 and the linkage blocks 66, all valve plates 62 can achieve synchronous radial sliding, thereby completing the linear opening and closing action of the valve orifice, precisely regulating the backflow flow to control the system pressure.

[0031] Clearly, in order to distribute the high-pressure slurry to multiple chemical additive devices or for other process points, a distribution valve 8 is also installed between the branch pipe 3 and the main slurry pipe 1 to control whether to distribute the slurry and the proportion of the slurry.

[0032] Preferably, to ensure system safety and prevent overpressure, a pressure relief pipe 82 is connected to the diversion pipe 3 via a pressure relief valve 81. When the pressure exceeds the set value, the valve automatically opens to discharge excess slurry back to the slurry tank or a designated container.

[0033] In summary, the principle of this embodiment is as follows: the high-pressure slurry diverted from the main slurry pipe 1 by the high-pressure pump 4 forms multiple high-speed jets through the guide holes 25 distributed circumferentially by the guide ring 24, and drives the strong rotational shear force field shaped by the spiral guide vanes 26 in the cone tube 21. At the same time, the stirring blades 71, driven by the stirring motor 7 and integrally formed with the baffle 27, perform mechanical shearing synchronously. As a result, the chemical additives fed from the feed port 23 are instantly broken and initially dispersed under the combined effect of rotating turbulence, frontal collision and mechanical shearing. Then, the mixture is returned to the main slurry pipe 1 through the regulating valve body 61, which is fed back in real time by the pressure sensor and whose opening is precisely controlled by the flow regulating component. Finally, under the closed-loop automatic pressure control, the chemical additives are efficiently, uniformly and stably dispersed and added.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0035] Although this paper frequently uses terms such as main slurry pipe 1, chemical auxiliary additive device 2, cone pipe 21, slurry inlet pipe 22, feed inlet 23, guide ring 24, guide hole 25, guide vane 26, baffle vane 27, shut-off valve 28, diverter pipe 3, high-pressure pump 4, check valve 5, pressure regulating assembly 6, regulating valve body 61, valve plate 62, regulating gear ring 63, regulating motor 64, linkage groove 65, linkage block 66, stirring motor 7, stirring blade 71, negative pressure pipe 72, one-way valve 73, feed pipe 74, distribution valve 8, pressure relief valve 81, and pressure relief pipe 82, the possibility of using other terms cannot be ruled out. These terms are used merely for the convenience of description.

[0036] The description and interpretation of the essence of this utility model shall not be construed as any additional limitation.

[0037] All of these are contrary to the spirit of this utility model.

Claims

1. A flow system auxiliary dispersing and adding device, comprising a main pipe (1) connected with an auxiliary adding device (2), characterized in that, The main slurry pipe (1) is connected to the chemical auxiliary additive device (2) through the diversion pipe (3) and the high-pressure pump (4). A check valve (5) is installed between the chemical auxiliary additive device (2) and the main slurry pipe (1). The chemical auxiliary additive device (2) is connected to a pressure regulating component (6).

2. The automated auxiliary dispersion and addition device for a flow conveying system according to claim 1, characterized in that, The chemical additive device (2) includes a cone tube (21), the upper side of the cone tube (21) is provided with a slurry inlet pipe (22) that communicates with the diversion pipe (3), the top of the cone tube (21) is provided with a feed inlet (23), and a flow guiding component is provided inside the cone tube (21) that is opposite to the slurry inlet pipe (22) and the feed inlet (23).

3. The automated auxiliary dispersion and addition device for a flow conveying system according to claim 2, characterized in that, The flow guiding assembly includes a flow guiding ring (24) installed on the top of the cone tube (21). The flow guiding ring (24) is hollow inside and communicates with the slurry inlet pipe (22). The lower end of the flow guiding ring (24) has flow guiding holes (25) arranged circumferentially. The inner side of the cone tube (21) is provided with a flow guiding plate (26) that is opposite to the flow guiding hole (25) and is spiral in shape. The cone tube (21) is installed with a baffle plate (27) located between the flow guiding hole (25) and the flow guiding plate (26). The feed inlet (23) is opposite to the baffle plate (27) and is equipped with a shut-off valve (28).

4. The automated auxiliary dispersion and addition device for a flow conveying system according to claim 2, characterized in that, The upper end of the cone tube (21) is equipped with a stirring motor (7). The output end of the stirring motor (7) extends into the interior of the cone tube (21) and has several triangular stirring blades (71). The stirring blades (71) and the baffle plate (27) are integrally formed.

5. The automated auxiliary dispersion and addition device for a flow conveying system according to claim 2, characterized in that, The top of the tapered tube (21) is connected to a negative pressure tube (72), which is connected to a negative pressure pump and is equipped with a one-way valve (73).

6. The automated auxiliary dispersion and addition device for a flow conveying system according to claim 2, characterized in that, The feed inlet (23) is connected to an independent feed pipe (74).

7. The automated auxiliary dispersion and addition device for a flow conveying system according to claim 1, characterized in that, The pressure regulating component (6) includes a flow regulating component and a pressure sensor installed between the chemical auxiliary additive device (2) and the main slurry pipe (1). Pressure sensors are installed in the diversion pipe (3) and the main slurry pipe (1), respectively.

8. The automated auxiliary dispersion and addition device for a flow conveying system according to claim 7, characterized in that, The flux regulation component includes a regulating valve body (61), inside which a plurality of valve plates (62) are movably installed in a centrally symmetrical arrangement. An regulating gear ring (63) is rotatably installed inside the regulating valve body (61). The regulating gear ring (63) meshes with a regulating motor (64) for transmission. The regulating gear ring (63) has a plurality of linkage grooves (65) that correspond one-to-one with the valve plates (62). The linkage blocks (66) on the valve plates (62) are slidably connected to the linkage grooves (65). The valve plates (62) slide and open and close synchronously with the rotation of the regulating gear ring (63).

9. The automated auxiliary dispersion and addition device for a flow conveying system according to claim 1, characterized in that, A distribution valve (8) is installed between the diversion pipe (3) and the main slurry pipe (1).

10. A systematized auxiliary dispersion and addition device for a flow conveying system according to claim 1, characterized in that, The diversion pipe (3) is connected to a pressure relief pipe (82) via a pressure relief valve (81).

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