阅读说明：本技术 一种用于甲基磺酸电镀锡液添加剂的加料装置及方法 (Feeding device and method for methanesulfonic acid electrotinning liquid additive ) 是由 尚元艳 谢志刚 王志登 王孝建 于 2020-05-27 设计创作，主要内容包括：本发明公开了一种用于甲基磺酸电镀锡液添加剂的加料装置及方法,主要解决现有镀液添加剂在电镀液中不能快速混匀的技术问题。本发明一种用于甲基磺酸电镀锡液添加剂的加料装置,包括镀液自循环系统和添加剂加料系统,镀液自循环系统包括镀液循环槽、镀液自循环泵和真空射流泵,镀液循环槽通过镀液自循环第一管道与镀液自循环泵进液口相连,真空射流泵出液口通过镀液第三循环管道与镀液循环槽相连；添加剂加料系统包括添加剂存储罐、自动流量控制阀和计量泵,添加剂加料第一支管上安装有计量泵,添加剂加料第二支管上安装有自动流量控制阀,真空射流泵的混合室与添加剂加料出口总管相连通。本发明装置实现了镀液添加剂在电镀液中快速混匀。(The invention discloses a feeding device and a feeding method for a methanesulfonic acid electrotinning liquid additive, and mainly solves the technical problem that the existing electrotinning liquid additive cannot be quickly and uniformly mixed in electroplating liquid. The invention relates to a feeding device for a methanesulfonic acid electrotinning liquid additive, which comprises a plating solution self-circulation system and an additive feeding system, wherein the plating solution self-circulation system comprises a plating solution circulation tank, a plating solution self-circulation pump and a vacuum jet pump; the additive feeding system comprises an additive storage tank, an automatic flow control valve and a metering pump, the metering pump is installed on a first additive feeding branch pipe, the automatic flow control valve is installed on a second additive feeding branch pipe, and a mixing chamber of the vacuum jet pump is communicated with a main additive feeding outlet pipe. The device of the invention realizes the rapid mixing of the plating solution additive in the electroplating solution.)

1. A feeding device for a methanesulfonic acid electrotinning liquid additive comprises a plating liquid self-circulation system and an additive feeding system, and is characterized in that: the plating solution self-circulation system comprises a plating solution circulation tank, a plating solution self-circulation pump and a vacuum jet pump, wherein the plating solution circulation tank is connected with a liquid inlet of the plating solution self-circulation pump through a plating solution self-circulation first pipeline, a plating solution self-circulation pump inlet valve is arranged on the plating solution self-circulation first pipeline, a liquid inlet of the vacuum jet pump is connected with a liquid outlet of the plating solution self-circulation pump through a plating solution self-circulation second pipeline, a liquid outlet of the vacuum jet pump is connected with the plating solution circulation tank through a plating solution third circulation pipeline, and a vacuum jet pump outlet valve is arranged on the plating solution self-circulation third pipeline; the additive charging system comprises an additive storage tank, an automatic flow control valve and a metering pump, the additive storage tank is communicated with a first additive charging branch pipe through an additive storage tank outlet main pipe, a second additive charging branch pipe is communicated with the first additive charging branch pipe, an additive storage tank outlet valve is arranged on the additive storage tank outlet main pipe, the metering pump is arranged on the first additive charging branch pipe, the automatic flow control valve is arranged on the second additive charging branch pipe, the first additive charging branch pipe, the second additive charging branch pipe is communicated with the additive charging outlet main pipe, an additive charging outlet main pipe valve is arranged on the additive charging outlet main pipe, and a mixing chamber of the vacuum jet pump is communicated with the additive charging outlet main pipe.

2. The feeding device for the methanesulfonic acid electrotinning bath additive according to claim 1, wherein the vacuum jet pump is installed above the bath circulation tank.

3. The feeding device for the additive of the electrolytic tinning liquid of methanesulfonic acid according to claim 1, wherein the additive feeding system is installed above the vacuum jet pump.

4. A method for feeding an additive of an electrolytic tin plating solution of methanesulfonic acid in a production preparation stage by using the feeding device of claim 1, characterized by comprising the steps of:

1) confirming the equipment state, namely confirming that all valves and pumps of the plating solution self-circulation system and the additive feeding system are in a closed state;

2) adding chemical raw materials and water which are required by preparing the plating solution except the additive into a plating solution circulating tank;

3) starting a plating solution self-circulation system, simultaneously starting an inlet valve of a plating solution self-circulation pump and an outlet valve of a vacuum jet flow pump, starting a plating solution self-circulation pump, and operating the plating solution self-circulation system;

4) opening an outlet valve of the additive storage tank and an additive feeding outlet main pipe valve;

5) adding an additive, setting the adding amount of the additive, and opening an automatic flow control valve to control the additive to be added into a mixing chamber of the vacuum jet pump at a set flow rate; when the flow display value of the automatic flow control valve is 0, closing the automatic flow control valve;

6) and (3) uniformly mixing the plating solution, controlling a plating solution self-circulation pump and a vacuum jet pump, controlling the plating solution to be circularly mixed, and when the component indexes of the plating solution meet the set value of the process, finishing the addition of the methanesulfonic acid tin plating solution additive in the production preparation stage and waiting for production.

5. A method for feeding the additive of the methanesulfonic acid electrotinning solution in the production process, which adopts the feeding device of claim 1 to feed, and is characterized by comprising the following steps:

1) dynamically adjusting the additive adding amount, starting a speed knob of a flowmeter, and setting the initial additive dropping speed according to the value consumed by the normal production of the additive; adjusting the size of a speed knob of the flowmeter according to an actual detection value of the concentration of the additive, controlling the dripping speed of the additive to be an initial dripping speed if the detection value is within +/-5% of a control median value, increasing the speed knob of the flowmeter by 10% if the detection value is less than 5% of the control median value, and reducing the speed knob of the flowmeter by 10% if the detection value is more than 5% of the control median value;

2) and (4) after the production is finished, the speed knob of the metering pump is reset to zero, the plating solution self-circulating pump, the front valve of the plating solution self-circulating pump and the rear valve of the liquid outlet of the vacuum jet pump are closed, the plating solution self-circulating system stops running, the main circulation of the plating solution is closed, and the system stops running.

Technical Field

The invention relates to a feeding device of an electrotinning liquid additive, in particular to a feeding device and a feeding method for a methanesulfonic acid electrotinning liquid additive, and belongs to the technical field of control processes and equipment of a tin liquid of a cold-rolled electrotinning steel plate.

Background

Among electrotinning systems for continuous high-speed electrotinning steel sheet production, the methanesulfonic acid (MSA) electrotinning system is an environmentally friendly electrotinning technology which has appeared in recent years, and has been widely used abroad, compared with the phenolsulfonic acid system (PSA) electrotinning system. The technology is used in the domestic plum steel, first steel, sand steel and Zhongyue electrotinning machine set. The MSA plating solution comprises divalent tin ions, methanesulfonic acid, an additive and an antioxidant, wherein the additive is a core technology and influences the nucleation of crystal grains, and can play a role in brightening the plating layer and refining the crystal grains. Therefore, the feeding method of the additive in production and the mixing uniformity in the plating solution play an important role in the quality and stability of the tinned product.

The general solution preparation or supplement mode of the plating solution additive in large-scale production is that an additive feeding storage tank is arranged on a machine set, an operator calculates the addition required by solution preparation according to the target control concentration and volume of the additive, then the additive is added into the solution at one time through a flow regulating valve below the storage tank for solution preparation operation, then the machine set is started to circularly and uniformly mix the solution, or the quantity to be supplemented is calculated according to the test data of the concentration of the additive, the target control concentration and the volume in production, and then the additive is added into the solution at one time through the flow regulating valve below the storage tank for supplement operation of the additive. The disadvantages of this charge are: the small volume of additive mixed with the large volume of solution required at least half an hour, and the additive concentration fluctuations caused by this feeding method increased the risk of quality fluctuations in the tin-plated product.

The Chinese patent application with application publication number CN104608273A discloses an automatic additive feeding method, which comprises the steps of adding a certain amount of water into a blending pump to prepare an additive solution, uniformly stirring, conveying the solution to a storage tank, uniformly stirring, controlling an automatic discharging valve to open through an automatic program, and enabling the additive to enter a material metering tank. The method is an improvement on the existing tin plating feeding mode, but does not solve the requirements of rapid mixing of the additive and the existing plating solution and reduction of concentration fluctuation after mixing in production.

Chinese patent application with application publication number CN108654984A discloses an additive feeding device for polymer material production, which comprises a box body, a cavity, a mounting hole, a blanking pipe, a feeding hole, a sliding plate, a sieve mesh, a motor and the like.

Disclosure of Invention

The invention aims to provide a feeding device and a feeding method for a methanesulfonic acid electrotinning liquid additive, which mainly solve the technical problem that the existing plating liquid additive cannot be mixed uniformly in electroplating liquid quickly.

The device adopts the technical idea that a self-circulation system of partial solution is formed by a vacuum jet pump, and the additive with a certain flow or continuous drops is added into a mixing chamber of the vacuum jet pump in a liquid preparation or replenishing mode in the production process of the electroplating liquid additive to be quickly mixed with the self-circulation solution.

The technical scheme adopted by the invention is that the feeding device for the additive of the methanesulfonic acid electrotinning solution comprises a plating solution self-circulation system and an additive feeding system, wherein the plating solution self-circulation system comprises a plating solution circulation tank, a plating solution self-circulation pump and a vacuum jet pump, the plating solution circulation tank is connected with a liquid inlet of the plating solution self-circulation pump through a plating solution self-circulation first pipeline, an inlet valve of the plating solution self-circulation pump is arranged on the plating solution self-circulation first pipeline, a liquid inlet of the vacuum jet pump is connected with a liquid outlet of the plating solution self-circulation pump through a plating solution self-circulation second pipeline, a liquid outlet of the vacuum jet pump is connected with the plating solution circulation tank through a plating solution third circulation pipeline, and a vacuum jet pump outlet valve is arranged on the plating solution self-circulation third pipeline; the additive charging system comprises an additive storage tank, an automatic flow control valve and a metering pump, the additive storage tank is communicated with a first additive charging branch pipe through an additive storage tank outlet main pipe, a second additive charging branch pipe is communicated with the first additive charging branch pipe, an additive storage tank outlet valve is arranged on the additive storage tank outlet main pipe, the metering pump is arranged on the first additive charging branch pipe, the automatic flow control valve is arranged on the second additive charging branch pipe, the first additive charging branch pipe, the second additive charging branch pipe is communicated with the additive charging outlet main pipe, an additive charging outlet main pipe valve is arranged on the additive charging outlet main pipe, and a mixing chamber of the vacuum jet pump is communicated with the additive charging outlet main pipe.

Further, the vacuum jet pump is arranged above the plating solution circulating groove.

Further, the additive feeding system is arranged above the vacuum jet pump; the additive is dripped or added into the circulating plating solution of the mixing chamber of the jet pump at a certain flow rate through a metering pump or an automatic flow control valve, and the added additive and part of the plating solution are instantly mixed through the vacuum jet pump.

The invention utilizes the vacuum jet pump, and the additive is added into the mixing chamber of the vacuum jet pump and the solution in the self-circulation pipeline under the action of vacuum suction force to realize instantaneous mixing, thereby improving the mixing efficiency of the additive in the plating solution.

The method for feeding the additive of the methanesulfonic acid electrotinning solution in the production preparation stage utilizes the device to feed materials, and comprises the following steps:

1) confirming the equipment state, namely confirming that all valves and pumps of the plating solution self-circulation system and the additive feeding system are in a closed state;

2) adding chemical raw materials and water which are required by preparing the plating solution except the additive into a plating solution circulating tank;

3) starting a plating solution self-circulation system, simultaneously starting an inlet valve of a plating solution self-circulation pump and an outlet valve of a vacuum jet flow pump, starting a plating solution self-circulation pump, and operating the plating solution self-circulation system;

4) opening an outlet valve of the additive storage tank and an additive feeding outlet main pipe valve;

5) adding an additive, setting the adding amount of the additive, and opening an automatic flow control valve to control the additive to be added into a mixing chamber of the vacuum jet pump at a set flow rate; when the flow display value of the automatic flow control valve is 0, closing the automatic flow control valve;

6) and (3) uniformly mixing the plating solution, controlling a plating solution self-circulation pump and a vacuum jet pump, controlling the plating solution to be circularly mixed, and when the component indexes of the plating solution meet the set value of the process, finishing the addition of the methanesulfonic acid tin plating solution additive in the production preparation stage and waiting for production.

The method for feeding the additive of the methanesulfonic acid electrotinning solution in the production process utilizes the device to feed materials, and comprises the following steps:

1) dynamically adjusting the additive adding amount, starting a speed knob of a flowmeter, and setting the initial additive dropping speed according to the value consumed by the normal production of the additive; adjusting the size of a speed knob of the flowmeter according to an actual detection value of the concentration of the additive, controlling the dripping speed of the additive to be an initial dripping speed if the detection value is within +/-5% of a control median value, increasing the speed knob of the flowmeter by 10% if the detection value is less than 5% of the control median value, and reducing the speed knob of the flowmeter by 10% if the detection value is more than 5% of the control median value;

2) and (4) after the production is finished, the speed knob of the metering pump is reset to zero, the plating solution self-circulating pump, the front valve of the plating solution self-circulating pump and the rear valve of the liquid outlet of the vacuum jet pump are closed, the plating solution self-circulating system stops running, the main circulation of the plating solution is closed, and the system stops running.

The feeding method of the invention uses the vacuum jet pump to solve the problem of rapid and uniform mixing of the additive and the plating solution during the solution preparation, and reduces the problem of quality fluctuation of the tin-plated product caused by the concentration fluctuation of the tin-plating solution additive during the production through continuous dropwise addition during the normal production.

Compared with the prior art, the technical scheme has the following positive effects: the device of the invention realizes the rapid and uniform mixing of the additive in the methanesulfonic acid electrotinning liquid, reduces the fluctuation of the concentration of the additive in the production and provides guarantee for the quality control of the cold-rolled electrotinning steel plate.

Drawings

FIG. 1 is a schematic view of the structure of an additive feeding device for plating solutions according to the present invention.

The notation in the figure is: 1-a plating solution circulating tank, 2-a plating solution self-circulation third pipeline, 3-a vacuum jet pump outlet valve, 4-a vacuum jet pump and 5-an additive feeding second branch pipe; 6-an automatic flow control valve, 7-an additive storage tank outlet valve, 8-an additive storage tank, 9-an additive storage tank outlet main pipe, 10-an additive feeding first branch pipe, 11-a metering pump, 12-an additive feeding outlet main pipe, 13-an additive feeding outlet main pipe valve, 14-a plating solution self-circulation second pipeline, 15-a plating solution self-circulation pump, 16-a plating solution self-circulation pump inlet valve and 17-a plating solution self-circulation first pipeline.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

The initial value of the speed adjusting knob of the metering pump in the embodiment of the invention is set to be 40%.

Embodiment 1, refer to fig. 1, a feeding device for a methanesulfonic acid electrotinning solution additive, comprising a plating solution self-circulation system and an additive feeding system, wherein the plating solution self-circulation system comprises a plating solution circulation tank 1, a plating solution self-circulation pump 15 and a vacuum jet pump 4, the plating solution circulation tank 1 is connected with a liquid inlet of the plating solution self-circulation pump 15 through a plating solution self-circulation first pipeline 17, the plating solution self-circulation first pipeline 17 is provided with a plating solution self-circulation pump inlet valve 16, a liquid inlet of the vacuum jet pump 4 is connected with a liquid outlet of the plating solution self-circulation pump 15 through a plating solution self-circulation second pipeline 14, a liquid outlet of the vacuum jet pump 4 is connected with the plating solution circulation tank 1 through a plating solution third circulation pipeline 2, and the plating solution self-circulation third pipeline 2 is provided with a vacuum jet pump outlet valve 3; the additive charging system comprises an additive storage tank 8, an automatic flow control valve 6 and a metering pump 11, the additive storage tank 8 is communicated with a first additive charging branch pipe 10 through an additive storage tank outlet main pipe 9, an additive charging second branch pipe 5 is communicated, an additive storage tank outlet valve 7 is arranged on the additive storage tank outlet main pipe 9, the metering pump 11 is arranged on the first additive charging branch pipe 10, the automatic flow control valve 6 is arranged on the second additive charging branch pipe 5, the first additive charging branch pipe 10, the additive charging second branch pipe 5 is communicated with an additive charging outlet main pipe 12, an additive charging outlet main pipe valve 13 is arranged on the additive charging outlet main pipe 12, and a mixing chamber of the vacuum jet pump 4 is communicated with the additive charging outlet main pipe 12.

The vacuum jet pump 4 is arranged above the plating solution circulating tank 1; the additive feeding system is arranged above the vacuum jet pump 4.

The method for feeding the additive of the methanesulfonic acid electrotinning solution in the production preparation stage utilizes the device to feed materials, and comprises the following steps:

1) confirming the equipment state, namely confirming that all valves and pumps of the plating solution self-circulation system and the additive feeding system are in a closed state;

2) adding chemical raw materials and water which are required by preparing the plating solution except the additive into a plating solution circulating tank;

3) starting a plating solution self-circulation system, simultaneously starting an inlet valve of a plating solution self-circulation pump and an outlet valve of a vacuum jet flow pump, starting a plating solution self-circulation pump, and operating the plating solution self-circulation system;

4) opening an outlet valve of the additive storage tank and an additive feeding outlet main pipe valve;

5) adding an additive, setting the adding amount of the additive, and opening an automatic flow control valve to control the additive to be added into a mixing chamber of the vacuum jet pump at a set flow rate; when the flow display value of the automatic flow control valve is 0, closing the automatic flow control valve;

6) and (3) uniformly mixing the plating solution, controlling a plating solution self-circulation pump and a vacuum jet pump, controlling the plating solution to be circularly mixed, and when the component indexes of the plating solution meet the set value of the process, finishing the addition of the methanesulfonic acid tin plating solution additive in the production preparation stage and waiting for production.

The method for feeding the additive of the methanesulfonic acid electrotinning solution in the production process utilizes the device to feed materials, and comprises the following steps:

1) dynamically adjusting the additive adding amount, starting a speed knob of a flowmeter, and setting the initial additive dropping speed according to the value consumed by the normal production of the additive; adjusting the size of a speed knob of the flowmeter according to an actual detection value of the concentration of the additive, controlling the dripping speed of the additive to be an initial dripping speed if the detection value is within +/-5% of a control median value, increasing the speed knob of the flowmeter by 10% if the detection value is less than 5% of the control median value, and reducing the speed knob of the flowmeter by 10% if the detection value is more than 5% of the control median value;

2) and (4) after the production is finished, the speed knob of the metering pump is reset to zero, the plating solution self-circulating pump, the front valve of the plating solution self-circulating pump and the rear valve of the liquid outlet of the vacuum jet pump are closed, the plating solution self-circulating system stops running, the main circulation of the plating solution is closed, and the system stops running.

In addition to the above embodiments, other embodiments are also possible in the present technical solution. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.