Low-dosage additive adding system

Abstract

The utility model discloses a low-dosage additive adding system, and mainly relates to the field of additive adding equipment. Comprising a main material pipe, a branch pipe, a collecting pipe and an assistant tank, a Venturi pipe is arranged on the branch pipe, the assistant tank is communicated with the Venturi pipe through a pipeline for adding an assistant, one end of the branch pipe is connected to the main material pipe, and the other end of the branch pipe and the discharging end of the main material pipe are both connected to one end of the collecting pipe in a confluence mode. The other end of the collecting pipe is connected with a mixer, a plurality of flow guide pieces are sequentially arranged in the mixer in the length direction of the mixer, each flow guide piece comprises flow guide plates which are oppositely and symmetrically arranged, one sides of the two flow guide plates are in butt joint and are segmentation sides, the two flow guide plates are in a V shape, and the segmentation sides of the adjacent flow guide pieces are not parallel. The dispersing device has the beneficial effects that the dispersing effect of additive addition is good, the structure is simple, the production is efficient, and the dispersing device is particularly suitable for low-dosage additive addition.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary agent dosing equipment, in particular to a low-dose auxiliary agent dosing system. Background Art

[0002] In production, based on process requirements, it is often necessary to add a variety of additives to the raw materials. Existing equipment mostly uses a dissolution box, a pneumatic diaphragm pump and a pipeline structure to inject the additives into the reaction system. With the optimization of the process and the improvement of product quality requirements, the accuracy and quality requirements of the additive addition amount are becoming increasingly higher. In particular, in many reactions, the proportion of additives used is extremely low. The accuracy of the addition amount and whether it is fully dispersed will greatly affect the reaction system. The addition process mainly relies on traditional metering equipment, and the problem of inaccurate addition amount is common. For low-dose additives, due to the small amount added, the error effect during addition is greater, and the dispersion is more difficult. Due to inaccurate or uneven addition, secondary dilution is often required, which increases process costs and makes it difficult to achieve precise control of the reaction, affecting product quality. Utility Model Content

[0003] The purpose of the utility model is to provide a low-dose additive dosing system, which has good additive dispersion effect, simple structure, high production efficiency, and is particularly suitable for low-dose additives.

[0004] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0005] A low-dose additive dosing system comprises a material main pipe, a branch pipe, a confluence pipe, and an additive tank, wherein the two ends of the material main pipe are respectively an incoming material end and a discharging material end, the branch pipe is provided with a venturi tube, the additive tank is connected to the venturi tube via a pipeline for dosing, one end of the branch pipe is connected to the material main pipe, the other end of the branch pipe and the discharging material end of the material main pipe are both converged and connected to one end of the confluence pipe, the other end of the confluence pipe is connected to a mixer, a plurality of guide members are sequentially provided in the mixer along its length direction, the guide members include relatively symmetrically arranged guide plates, one side of two of the guide plates are butted against each other and serve as a dividing side, the two guide plates are V-shaped, and the dividing sides of adjacent guide members are not parallel.

[0006] The dividing sides of adjacent flow guide members are arranged vertically.

[0007] The venturi tube includes a feed pipe, a mixing pipe, and a diffusion pipe that are fixed in sequence and coaxially connected. The outer ends of the feed pipe and the diffusion pipe are respectively connected to the branch pipe. The feed pipe is provided with a nozzle in the mixing pipe. The mixing pipe is connected to a dosing pipe. The outer end of the dosing pipe is connected to the additive tank through a pipeline.

[0008] The guide member further comprises a closing plate arranged opposite to each other, with both sides of the closing plate respectively butting against the side edges of the guide plate, and the closing plate being an arc-shaped plate adapted to and fitted with the inner wall surface of the mixing tube.

[0009] The flow guide is a shell structure, and the flow guide has a shell cavity structure adapted to its shape on the rear side away from the dividing side.

[0010] A sleeve is centered on the guide member, and positioning holes distributed in a cross are passed through the sleeve. A positioning pin is passed through the opposite positioning hole. A fixing rod coaxial with the mixing tube is fixed in the mixing tube, and pin holes that pass through the fixing rod horizontally are equidistantly provided on the fixing rod. The fixing rod passes through the sleeve, and the positioning pin is fitted into the pin hole.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] Two-stage mixing is achieved through the Venturi tube and mixer. First, a part of the material is diverted from the material main pipe, and the additives are added through the Venturi tube to obtain preliminary dispersion and mixing. After merging with the material main pipe, the fluid is cut and mixed again through the mixing tube. The split sides at different angles are used to repeatedly cut and divert the fluid, and the fluid disturbance is enhanced by the extrusion of the tube cavity by the guide plate, which greatly improves the mixing effect, thereby improving the accuracy of low-dose additives in the material and ensuring the accuracy requirements of the process for the additive content. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall schematic diagram of the present utility model.

[0014] Figure 2 It is a schematic diagram of the internal structure of the mixer of the utility model in a corrosion state.

[0015] Figure 3 It is a schematic diagram of the disassembly of components of the mixer of the utility model.

[0016] Figure 4 It is a schematic diagram of the flow guide and the fixing rod of the utility model.

[0017] Figure 5 This utility model Figure 4 Magnified view of the G section.

[0018] Reference numerals shown in the accompanying drawings:

[0019] 1. Material main pipe; 2. Branch pipe; 3. Converging pipe; 4. Feed pipe; 5. Connecting pipe; 6. Diffuser pipe; 7. Dosing pipe; 8. Mixing pipe; 9. Closing plate; 10. Guide plate; 11. Splitting side; 12. Casing; 13. Positioning hole; 14. Positioning pin; 15. Pin hole; 16. Fixing rod; 17. Connecting rod. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that these equivalent forms also fall within the scope defined in this application.

[0021] The system is mainly connected to the pipeline structure in the production material transportation. The main pipeline structure includes: material main pipe 1, branch pipe 2, and manifold 3; it also includes independently set auxiliary agent tanks and related equipment.

[0022] The two ends of the material main pipe 1 are respectively an incoming end and a outgoing end. The incoming end is used to connect with the raw material pipeline in production to transport the reaction materials;

[0023] The two ends of the branch pipe 2 are respectively the feed end and the discharge end. The feed end of the branch pipe 2 is connected to the material main pipe 1 through a metering liquid valve, and the metering liquid valve is used to control the amount of material entering the branch pipe 2. One end of the manifold 3 is connected to the discharge end of the branch pipe 2 and the discharge end of the material main pipe 1 in a three-way manner, so that the materials in the material main pipe 1 and the branch pipe 2 are converged and concentrated in the manifold 3.

[0024] A venturi tube is installed on the branch pipe 2, and the venturi tube includes a feed pipe 4, a connecting pipe 5, and a diffuser 6 that are fixed in sequence and coaxially connected. The outer ends of the feed pipe 4 and the diffuser 6 are respectively connected to the branch pipe 2, so that the material is directionally transported from the feed pipe 4 to the diffuser 6. The feed pipe 4 is provided with a nozzle in the connecting pipe 5, and the connecting pipe 5 is connected to a dosing pipe 7. The outer end of the dosing pipe 7 is connected to the auxiliary agent tank through a pipeline. The auxiliary agent tank is separately provided and is equipped with a liquid level gauge, necessary pipe fittings and valve components, a pressure gauge, etc. according to conventional production needs.

[0025] A feeding pump is provided on the connecting pipe 5 between the auxiliary agent tank and the dosing pipe 7. The pump adopts a pneumatic diaphragm pump and is used to inject the agent in the auxiliary agent tank into the dosing pipe 7 and achieve preliminary mixing with part of the diverted material through the venturi tube.

[0026] Based on the above structure, through this system, a part of the material is diverted through the branch pipe 2 during material transportation, and a small amount of additives is added to the diverted part of the material through the Venturi tube, and the material and the additive are preliminarily mixed using the better mixing effect of the Venturi, and then the material is mixed through the manifold 3, and the material diversion and additive injection are respectively measured by metering pumps, and the addition accuracy is high.

[0027] The end of the manifold 3 away from the material main pipe 1 is connected to a mixer, and the mixer includes a mixing tube 8 that can be disassembled in the central position. Both ends of the mixing tube 8 are provided with flanges for connection. One end of the mixing tube 8 is sealed and fixed to the manifold 3. A fracture of a truncation structure is provided in the center of the mixing tube 8, and a flange structure with bolts is provided on the fracture, which can be disassembled in the middle to facilitate the installation and adjustment of internal components.

[0028] The interior of the mixing tube 8 is provided with three guide members equidistantly along its length. The guide members include guide plates 10 and closing plates 9 that are symmetrically and oppositely arranged in pairs. One side of the guide plates 10 is butted, and the joint is defined as a dividing side 11. The dividing side 11 is arranged close to the incoming material direction and corresponds to the diameter of the mixing tube 8, thereby colliding and diverting the flowing material. The two guide plates 10 are symmetrical, acute-angled V-shaped structures. The two sides of the closing plate 9 are butted against the side edges of the guide plates 10, respectively. The closing plate 9 is an arc-shaped plate adapted to the inner wall surface of the mixing tube 8 and can fit the inner wall of the mixing tube 8. When the material passes through the guide member, it is first diverted into two parts by the dividing side 11, and the two parts of the material are respectively diverted by the guide plates 10 on the same side. Based on the V-shaped structure of the guide plates 10, the space between the guide plates 10 and the mixing tube 8 becomes smaller and smaller.

[0029] The guide member is a shell structure, which can save materials and obtain a shell cavity structure suitable for its size at the end away from the dividing side 11, and obtain a rapidly increasing space when the fluid flows through the rear side of the guide member.

[0030] The dividing sides 11 of adjacent flow guides are arranged vertically to obtain a static mixing effect.

[0031] Based on the above structure, after the material enters the mixing tube 8, it can be diverted by the dividing sides 11 of different guide members, thereby obtaining a fluid mixing effect. At the same time, when flowing through the guide member, the flow space is first squeezed by the rear side of the guide plate 10, and then rapidly increases between adjacent guide plates 10, so that the material between the guide members enhances the mixed flow disturbance. The above two aspects are superimposed to obtain a good mixing effect, and the material in the branch pipe 2 after the addition is fully mixed with the material in the material main pipe 1, so that the additive is well dispersed in the material.

[0032] A coaxial fixing rod 16 is provided in the mixing tube 8 , and connecting rods 17 perpendicular thereto are fixed at both ends of the fixing rod 16 . One end of the connecting rod 17 away from the fixing rod 16 is welded and fixed to the inner wall of the mixing tube 8 .

[0033] A sleeve 12 is centered on the guide member and is used to be sleeved on a fixing rod 16. The sleeve 12 is penetrated by positioning holes 13 distributed in a cross pattern, and a positioning pin 14 is penetrated in each of the relative positioning holes 13. Pin holes 15 that penetrate the fixing rod 16 horizontally are equidistantly provided. The positioning pins 14 cooperate with the pin holes 15 to fix the guide member, and the split side 11 of the guide member is made vertical or horizontal by the cooperation of the positioning pins 14 with different positioning holes 13.

[0034] Through the fracture located in the middle of the mixing tube 8 or the pipe openings at both ends, the fixing and processing of the fixing rod 16 and the connecting rod 17 can be facilitated, and through the fracture located in the middle of the mixing tube 8, the number, spacing and angle of the guide parts can be adjusted, thereby facilitating the planning and coordination of the internal layout according to the mixing conditions.

Claims

1. A low-dose adjuvant dosing system, characterized in that: It includes a material main pipe, a branch pipe, a confluence pipe, and an auxiliary agent tank. The two ends of the material main pipe are the incoming material end and the outgoing material end respectively. The branch pipe is provided with a venturi tube. The auxiliary agent tank is connected to the venturi tube through a pipeline for adding agents. One end of the branch pipe is connected to the material main pipe. The other end of the branch pipe and the outgoing material end of the material main pipe are converged and connected to one end of the confluence pipe. The other end of the confluence pipe is connected to a mixer. A plurality of guide members are sequentially provided in the mixer along its length direction. The guide members include relatively symmetrically arranged guide plates. One side of the two guide plates is butt-jointed and is a dividing side. The two guide plates are V-shaped, and the dividing sides of adjacent guide members are not parallel.

2. A low-dose adjuvant dosing system according to claim 1, characterized in that: The dividing sides of adjacent flow guide members are arranged vertically.

3. A low-dose adjuvant dosing system according to claim 1, characterized in that: The venturi tube includes a feed pipe, a mixing pipe, and a diffusion pipe that are fixed in sequence and coaxially connected. The outer ends of the feed pipe and the diffusion pipe are respectively connected to the branch pipe. The feed pipe is provided with a nozzle in the mixing pipe. The mixing pipe is connected to a dosing pipe. The outer end of the dosing pipe is connected to the additive tank through a pipeline.

4. A low-dose adjuvant dosing system according to claim 1, characterized in that: The guide member further comprises a closing plate arranged opposite to each other, with both sides of the closing plate respectively butting against the side edges of the guide plate, and the closing plate being an arc-shaped plate adapted to and fitted with the inner wall surface of the mixing tube.

5. A low-dose adjuvant dosing system according to claim 4, characterized in that: The flow guide is a shell structure, and the flow guide has a shell cavity structure adapted to its shape on the rear side away from the dividing side.

6. A low-dose adjuvant dosing system according to claim 3, characterized in that: A sleeve is centered on the guide member, and positioning holes distributed in a cross are passed through the sleeve. A positioning pin is passed through the opposite positioning hole. A fixing rod coaxial with the mixing tube is fixed in the mixing tube, and pin holes that pass through the fixing rod horizontally are equidistantly provided on the fixing rod. The fixing rod passes through the sleeve, and the positioning pin is fitted into the pin hole.

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