CN216440644U

CN216440644U - Tubular continuous reactor for silver powder preparation

Info

Publication number: CN216440644U
Application number: CN202122508548.5U
Authority: CN
Inventors: 李留帮; 丁宏卫; 冯俊波; 杨静静
Original assignee: Zhengzhou Zhuoretai New Material Technology Co ltd
Current assignee: Zhengzhou Zhuoretai New Material Technology Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-05-06
Anticipated expiration: 2031-10-18

Abstract

The utility model discloses a tubular continuous reactor for preparing silver powder, which comprises a main pipeline, wherein a mixed solution of a reducing agent and a dispersing agent is introduced into the inlet end of the main pipeline through a first pump body, at least two first branch pipelines extending into the main pipeline are uniformly distributed along the flowing direction of liquid in the main pipeline, each first branch pipeline is communicated with a second pump body corresponding to the first branch pipeline, a solution containing silver ions and a solution containing a PH regulator are respectively introduced into the main pipeline through different first branch pipelines, and a second branch pipeline communicated with the inside of the outlet end of the main pipeline is arranged on the side wall of the outlet end of the main pipeline; according to the utility model, the main pipeline is matched with the first branch pipeline and the second branch pipeline, the mixed solution obtained after the reaction of the silver ion-containing solution, the reducing agent and the dispersing agent does not need to be transferred to the treatment kettle, and the second branch pipeline directly introduces the hydrophobic agent into the main pipeline and reacts with the reacted mixed solution, so that the process steps are saved, the occupied area is small, and the continuous production can be realized.

Description

Tubular continuous reactor for silver powder preparation

Technical Field

The utility model belongs to the technical field of silver powder preparation devices, and relates to a tubular continuous reactor for preparing silver powder.

Background

The metal silver has excellent electric conduction, heat conduction and oxidation resistance, and is widely applied to the electrical and electronic industries. The conventional conductive paste for the internal electrode of a multilayer capacitor, the printed circuit of a circuit board, the electrode of a solar cell and the electrode of a plasma display panel substrate is usually prepared by mixing silver powder, glass powder, inorganic additives and the like in an organic carrier, stirring, grinding and rolling, wherein the silver powder accounts for the highest mass fraction, and the quality of the silver powder greatly influences the performance of the final paste.

There are various methods for preparing ultrafine silver powder, and a liquid phase method, a solid phase method and a gas phase method are useful for research, but the most common and most economical mass production method is still a liquid phase precipitation method. The utility model provides a tubular continuous reactor for preparing silver powder, which is used for dropwise adding and synthesizing batch type reaction kettles used for preparing silver powder in the traditional process, wherein when reaction kettles with different tonnages are synthesized in the same process, the influence of the titration mass transfer process is different, so that the amplification effect is generated, obvious quality difference is generated, after the reaction is finished, a reaction product solution needs to be transferred to a treatment kettle and then subjected to hydrophobic surface treatment, the whole operation procedure is relatively complicated, and meanwhile, the occupation area of a plurality of reaction kettles and the treatment kettle is large.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the background art, the utility model provides a tubular continuous reactor for preparing silver powder.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a silver powder preparation is with tubular continuous reactor, includes the trunk line, the entry end of trunk line lets in the mixed solution of reductant and dispersant through first pump body, has at least two first branch pipelines that stretch into in the trunk line, every along the trunk line in the liquid flow direction equipartition first branch pipeline all communicates has the second pump body rather than corresponding, lets in silver ion solution and PH regulator solution in to the trunk line respectively through the first branch pipeline of difference, trunk line exit end lateral wall is provided with the second branch pipeline rather than inside intercommunication, second branch pipeline intercommunication has the third pump body for let in the hydrophobe in to the trunk line, be provided with a plurality of mixing pieces that are used for containing silver ion solution, PH regulator solution and mixed solution intensive mixing on the trunk line.

Further, it is a plurality of the mixing member is with a plurality of first branch pipelines and second branch pipeline one-to-one, the mixing member is the ultrasonic vibration ring, the ultrasonic vibration ring cover is established on the trunk line outer wall to pass through the bolt-up.

Furthermore, the distance between the upper end surface of the mixing part and the port of the corresponding first branch pipeline or second branch pipeline extending into the main pipeline is 2-10 cm.

Further, the distance between the outlet ends of two adjacent first branch pipelines is 30-50 cm.

Further, the inner diameter of the main pipeline is 40-80mm, and the length of the main pipeline is 10-15 m.

Further, the diameter of the first branch pipe and the diameter of the second branch pipe are 10-30 mm.

Further, the first pump body, the second pump body and the third pump body are all peristaltic pumps, and the flow rate of the peristaltic pumps is 1-10L/min.

Further, the outer side wall of the main pipeline is coated with a heat insulation layer.

Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the main pipeline is matched with the first branch pipeline and the second branch pipeline, the mixed solution obtained after the reaction of the silver ion-containing solution, the reducing agent and the dispersing agent does not need to be transferred to the treatment kettle, and the second branch pipeline directly introduces the hydrophobic agent into the main pipeline and reacts with the reacted mixed solution, so that the process steps are saved, the occupied area is small, and the continuous production can be realized.

Drawings

FIG. 1 is a schematic diagram of the present invention.

In the figure: 1. a main pipeline; 2. a first pump body; 3. a first branch duct; 4. a second pump body; 5. a second branch pipe; 6. a third pump body; 7. a mixing member; 8. and (7) an insulating layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the technical solution adopted by the present invention is as follows: a tubular continuous reactor for preparing silver powder comprises a main pipeline 1, a first pump body 2, a first branch pipeline 3, a second pump body 4, a second branch pipeline 5 and a third pump body 6, wherein the first pump body 2 is arranged at the inlet end of the main pipeline 1, the first pump body 2 leads a reducing agent and a dispersing agent mixed solution required by reaction into the main pipeline 1, a plurality of first branch pipelines 3 are arranged, the number of the first branch pipelines 3 is set according to actual conditions, the plurality of first branch pipelines 3 are uniformly arranged along the flowing direction of liquid in the main pipeline 1, the plurality of first branch pipelines 3 all extend into the main pipeline 1, each first branch pipeline 3 is communicated with one second pump body 4, when in use, a silver ion-containing solution and a PH regulator solution are led into the main pipeline 1 through different first branch pipelines 3 and react with the reducing agent and the dispersing agent mixed solution, wherein the adding sequence of the silver ion-containing solution and the PH regulator solution can be adjusted according to different product requirements, silver powder with different shapes is flexibly prepared by changing the adding sequence, the solution concentration and the adding amount of the silver ion-containing solution and the pH regulator solution;

second subchannel 5 sets up at trunk line 1 exit end to communicate with trunk line 1, third pump body 6 communicates with second subchannel 5, and let in the hydrophobic agent in trunk line 1, contain silver ion solution, PH regulator solution reductant and dispersant after the intensive reaction, the hydrophobic agent directly carries out hydrophobic surface treatment to the solution after the reaction, need not to transfer the solution after the reaction to the treatment kettle in again, reduces the operation degree of difficulty, be provided with a plurality of mixing parts 7 that are used for containing silver ion solution, PH regulator solution and mixed solution intensive mixing on the trunk line 1.

In this embodiment, a plurality of the mixing members 7 correspond to a plurality of the first branch pipes 3 and the second branch pipes 5 one by one, when the solution containing silver ions and the PH regulator solution are introduced into the main pipe 1, the mixing members 7 can fully mix the solution with the reducing agent and the dispersing agent, the mixed solution can also fully mix with the hydrophobing agent, so as to improve the mixing efficiency, the mixing members 7 are ultrasonic vibration rings, the ultrasonic vibration rings are sleeved on the outer wall of the main pipe 1 and fixed on the main pipe 1 through bolts, ultrasonic transducers are arranged in the ultrasonic vibration rings, the ultrasonic transducers work in cooperation with an ultrasonic generator, the ultrasonic generator converts the mains supply into high-frequency alternating current signals matched with the ultrasonic transducers to drive the ultrasonic transducers to work, and the ultrasonic transducers convert the electric power input by the ultrasonic generator into mechanical power (i.e. ultrasonic waves), the preferred ultrasonic frequency in this embodiment is 20KHz or 40KHz, and this ultrasonic wave vibrations ring can produce the ultrasonic wave to main pipe 1 in its region, and then makes the regional solution intensive mixing.

In this embodiment, the distance between the upper end surface of the mixing member 7 and the port of the first branch pipe 3 or the second branch pipe 5 corresponding thereto extending into the main pipe 1 is 2-10cm, the solution containing silver ions and the solution containing PH regulator introduced into the main pipe 1 from different first branch pipes 3 are premixed with the solution mixed with the reducing agent and the dispersing agent, along with the flow of the liquid, the premixed liquid is fully mixed by the mixing member 7 to form silver particles, and the hydrophobizing agent flowing into the main pipe 1 from the second branch pipe 5 is adsorbed on the silver particles after the reaction.

In this embodiment, because the effect of ultrasonic wave vibrations ring, silver powder that contains silver ion solution formation under the effect of reductant, dispersant, hydrophobe is difficult to adsorb on 1 inner walls of trunk line, when trunk line 1 is washd to needs, opens ultrasonic wave vibrations ring to it can to let in the pure water from 1 entrance points of trunk line, compare in traditional reation kettle, it is more convenient to wash, has saved time and cost.

In this embodiment, the distance between the outlet ends of two adjacent first branch pipes 3 is 30-50cm, the inner diameter of the main pipe 1 is 40-80mm, the length of the main pipe 1 is 10-15m, the diameters of the first branch pipes 3 and the second branch pipes 5 are 10-30mm, the first pump body 2, the second pump body 4 and the third pump body 6 are peristaltic pumps, the flow rate of the peristaltic pumps is 1-10L/min, the flow rates of the first pump body 2, the second pump body 4 and the third pump body 6 and the pipe diameters of the main pipe 1, the first branch pipes 3 and the second branch pipes 5 can be specifically adjusted according to the requirements of different products, and the preparation requirements of various products are met.

In this embodiment, 1 lateral wall cladding of trunk line has heat preservation 8, and this heat preservation 8 adopts high density polyurethane insulation material, because trunk line 1 is longer, contains silver ion solution and reductant and dispersant and need react under specific temperature, and during the reaction, preheats required reaction solution to the regulation temperature, and this heat preservation 8 can avoid the trunk line 1 in the temperature change, guarantees the stability of reaction.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. The tubular continuous reactor for preparing the silver powder is characterized in that: including the trunk line, the entry end of trunk line lets in the mixed solution of reductant and dispersant through first pump body, has two at least first subchannels that stretch into in the trunk line, every along the trunk line in the liquid flow direction equipartition first subchannel all communicates has the second pump body rather than corresponding, lets in respectively to the trunk line through the first subchannel of difference and contains silver ion solution and PH regulator solution, trunk line exit end lateral wall is provided with the second subchannel rather than inside intercommunication, second subchannel intercommunication has the third pump body for let in the hydrophobe in to the trunk line, be provided with a plurality of mixed parts that are used for containing silver ion solution, PH regulator solution and mixed solution intensive mixing on the trunk line.

2. The tubular continuous reactor for silver powder production according to claim 1, characterized in that: it is a plurality of the mixing member divides pipeline one-to-one with a plurality of first branch pipelines and second, the mixing member is ultrasonic vibration ring, ultrasonic vibration ring cover is established on the trunk line outer wall to pass through the bolt-up.

3. The tubular continuous reactor for silver powder production according to claim 2, characterized in that: the distance between the upper end surface of the mixing part and the port of the first branch pipeline or the second branch pipeline corresponding to the mixing part, which extends into the main pipeline, is 2-10 cm.

4. The tubular continuous reactor for silver powder production according to claim 1, characterized in that: the distance between the outlet ends of two adjacent first branch pipelines is 30-50 cm.

5. The tubular continuous reactor for silver powder production according to claim 1, characterized in that: the inner diameter of the main pipeline is 40-80mm, and the length of the main pipeline is 10-15 m.

6. The tubular continuous reactor for silver powder production according to claim 1, characterized in that: the diameters of the first branch pipeline and the second branch pipeline are 10-30 mm.

7. The tubular continuous reactor for silver powder production according to claim 1, characterized in that: the first pump body, the second pump body and the third pump body are all peristaltic pumps, and the flow rate of the peristaltic pumps is 1-10L/m/n.

8. The tubular continuous reactor for silver powder production according to claim 1, characterized in that: the outer side wall of the main pipeline is coated with a heat insulation layer.