阅读说明：本技术 一种pcb板蚀刻废液回收生产碱铜的合成釜和生产方法 (Synthetic kettle and production method for producing alkali copper by recovering PCB (printed circuit board) etching waste liquid ) 是由 陈乐� 欧富初 陈庆金 于 2019-12-13 设计创作，主要内容包括：本发明公开了一种PCB板蚀刻废液回收生产碱铜的合成釜和生产方法,该合成釜的顶端第一环形围坝的设置,便于控制进料范围和在第一环形围坝外侧进行固液分离,从而使进料不易影响固液分离的进行；转动搅拌件的设置,便于物料的分散,利于碱铜晶体的碰撞长大；第二环形围坝和倾斜壁面的设置,一方面便于使第二环形围坝内侧的液体不易带动限流口/限流通道与液体输出通道之间液体,即降低限流口/限流通道与液体输出通道之间液体的流动性,另一方面便于固液分离时,限流口/限流通道与液体输出通道之间较重物能够从倾斜壁面向下滑落而不易累积；合成釜下端漏斗槽的设置,便于碱铜的累积,放料阀的设置,便于下端碱铜输出和上端继续进料合成碱铜。(The invention discloses a synthesis kettle and a production method for producing alkali copper by recovering PCB (printed circuit board) etching waste liquid, wherein a first annular dam is arranged at the top end of the synthesis kettle, so that the feeding range is convenient to control, and solid-liquid separation is carried out outside the first annular dam, so that the feeding is not easy to influence the solid-liquid separation; the arrangement of the rotary stirring piece is convenient for the dispersion of materials and the collision growth of the alkali copper crystals; the arrangement of the second annular box dam and the inclined wall surface is convenient for the liquid inside the second annular box dam not to easily drive the liquid between the flow restriction opening/flow restriction channel and the liquid output channel, namely the liquidity of the liquid between the flow restriction opening/flow restriction channel and the liquid output channel is reduced, and on the other hand, when solid-liquid separation is convenient, heavy objects between the flow restriction opening/flow restriction channel and the liquid output channel can slide downwards from the inclined wall surface and are not easy to accumulate; the arrangement of the funnel groove at the lower end of the synthesis kettle is convenient for the accumulation of the alkali copper, and the arrangement of the discharge valve is convenient for the output of the alkali copper at the lower end and the continuous feeding of the alkali copper at the upper end to synthesize the alkali copper.)

1. A synthetic kettle for producing alkali copper by recovering waste etching liquid of a PCB (printed circuit board) is characterized in that a first annular dam (2) extending downwards, an acid waste etching liquid input channel (3) and an alkaline waste etching liquid input channel (4) used for feeding liquid to an area surrounded by the first annular dam (2), a rotating stirring piece (5) used for downwards extending through the area surrounded by the first annular dam (2) and a second annular dam (6) extending downwards and surrounding the first annular dam (2), wherein the lower edge of the second annular dam (6) is higher than the lower edge of the first annular dam (2), an inclined wall surface (7) gradually inclining upwards from inside to outside is arranged on the inner side wall of the synthetic kettle (1) close to the upper end, and the lower edge of the second annular dam (6) is arranged above the inclined wall surface (7), a flow limiting opening/flow limiting channel (8) is formed between the inclined wall surface (7) and the second annular dam (6), a liquid output channel (9) is arranged on the side wall of the synthesis kettle (1) above the flow limiting opening/flow limiting channel (8), a funnel groove (10) convenient for accumulation of alkali copper is arranged at the lower end of the synthesis kettle (1), and the output end of the funnel groove (10) is connected with a discharge valve (101).

2. The synthetic kettle for recycling PCB etching waste liquid to produce alkali copper according to claim 1, wherein the rotating stirring member (5) comprises a rotating vertical rod (50), and the rotating vertical rod (50) is provided with an upper blade (51) located in the area surrounded by the first annular dam (2), a middle blade (52) located near the lower end opening of the area surrounded by the first annular dam (2), and a lower blade (53) located between the area surrounded by the first annular dam (2) and the funnel tank (10).

3. The synthesis kettle for recovering waste PCB etching solution to produce alkali copper according to claim 1, wherein one end of the liquid output channel (9) in the synthesis kettle (1) is provided with an overflow port (91) with an upward opening.

4. The synthesis kettle for recovering waste PCB etching liquid to produce alkali copper according to claim 1, characterized in that a vertical wall (12) is arranged between the lower edge of the inclined wall (7) and the upper edge of the funnel groove (10).

5. The synthesis kettle for recovering waste PCB etching solution to produce alkali copper according to claim 1, wherein the synthesis kettle (1) is further provided with a thermometer, a pressure gauge, a detection port and a waste gas collection hole.

6. A production method for producing alkali copper by recovering PCB board etching waste liquid, which is characterized by comprising the synthesis kettle (1) of any one of claims 1 to 5, and the production method comprises the following steps:

adding hydrogen peroxide or a sodium chlorate solution into the acidic etching waste liquid, oxidizing cuprous chloride in the components of the acidic etching waste liquid, adjusting the pH value of the solution to 1.0-1.2 by using ammonia water or cuprammonia solution, and then carrying out solid-liquid separation to obtain an acidic liquid A for synthesizing the alkali copper;

an alkaline etching waste liquid impurity removal treatment step, namely adding a small amount of acidic liquid A and ammonia water into the alkaline etching waste liquid, adjusting the pH value of the alkaline etching waste liquid to 10.5-11, and then carrying out solid-liquid separation to obtain alkaline liquid B for synthesizing the alkaline copper;

the method comprises the steps of synthesizing the alkali copper, namely preheating an acidic liquid A and an alkaline liquid B to 50-60 ℃, injecting the acidic liquid A into a synthesis kettle (1) through an acidic etching waste liquid input channel (3) and injecting the alkaline liquid B into the synthesis kettle (1) through an alkaline etching waste liquid input channel (4) to obtain a liquid C as a mother liquid for synthesizing the alkali copper, adjusting the flow rates of the acidic liquid A and the alkaline liquid B to enable the pH value of the liquid C to be 4.5-4.8, heating to 65-80 ℃ and carrying out liquid stirring, and opening a discharge valve (101) to discharge when the mother liquid in the alkali copper synthesis kettle is clearer and the alkali copper is dark green.

7. The method for producing alkali copper by recycling waste etching solution of PCB board as claimed in claim 6, wherein in the step of synthesizing alkali copper, when the liquid level in the synthesizing kettle (1) is close to the height of the liquid output channel (9), the discharging valve (101) is opened to discharge, otherwise, the acidic liquid A and the alkaline liquid B are continuously injected, and when the mother solution in the synthesizing kettle of alkali copper is clearer and the alkali copper is dark green, the discharging valve (101) is opened to discharge.

Technical Field

The invention relates to a synthesis kettle for producing alkali copper by recovering PCB (printed circuit board) etching waste liquid and a production method.

Background

PCB boards, also known as printed circuit boards, are providers of electrical connections for electronic components, and have been developed for over 100 years. The circuit of the printed circuit board is formed by an etching process in the process of dissolving copper on a substrate, and simultaneously, a large amount of copper-containing etching waste liquid is generated. The copper-containing waste liquid can be divided into two categories, namely acidic etching waste liquid and alkaline etching waste liquid according to the characteristics of the copper-containing waste liquid, and if the etching waste liquid is not properly treated and utilized, the waste of resources and serious environmental pollution can be caused. The domestic common treatment method comprises the following steps: extracting copper from the acid and alkali etching waste liquid to produce copper hydroxide, alkali copper, copper oxide, copper sulfate or other copper compounds and other products.

In order to produce high-purity copper products, acid-base etching waste liquid is generally pretreated to remove impurities such as arsenic, lead and the like in the acid-base etching waste liquid, so that the acid-base etching waste liquid is subjected to neutralization reaction to generate amorphous alkali copper precipitate, and products such as copper oxide, copper sulfate and the like are prepared after further reaction; in the neutralization reaction process, if certain reaction conditions are adopted, such as temperature, pH value, stirring speed and the like, crystalline basic copper chloride can be prepared and can be sold as a product.

In the prior art, due to the difference of reaction devices and corresponding auxiliary equipment and the complexity of a synthesis process, preheating, heating, heat preservation, the use of acid and alkali and other chemical reagents, waste gas and waste water treatment and the like exist in the synthesis process, and the production of the alkali copper has many problems of safety and environmental protection.

Therefore, how to overcome the above-mentioned drawbacks has become an important issue to be solved by those skilled in the art.

Disclosure of Invention

The invention overcomes the defects of the technology and provides a synthesis kettle and a production method for producing alkali copper by recovering the PCB etching waste liquid.

In order to achieve the purpose, the invention adopts the following technical scheme:

a synthetic kettle for producing alkali copper by recovering PCB board etching waste liquid, the top end of the synthetic kettle 1 is provided with a first annular dam 2 extending downwards, an acid etching waste liquid input channel 3 and an alkaline etching waste liquid input channel 4 for feeding liquid to the area surrounded by the first annular dam 2, a rotary stirring piece 5 extending downwards after passing through the area surrounded by the first annular dam 2, and a second annular dam 6 extending downwards and surrounding the first annular dam 2, the lower edge of the second annular dam 6 is higher than the lower edge of the first annular dam 2, the inner side wall of the synthetic kettle 1 is provided with an inclined wall surface 7 inclining upwards gradually from inside to outside near the upper end position, the lower edge of the second annular dam 6 is positioned above the inclined wall surface 7, a limited flow opening/limited flow channel 8 is formed between the inclined wall surface 7 and the second annular dam 6, the side wall of the synthesis kettle 1 above the flow limiting port/flow limiting channel 8 is provided with a liquid output channel 9, the lower end of the synthesis kettle 1 is provided with a funnel groove 10 convenient for alkali copper accumulation, and the output end of the funnel groove 10 is connected with a discharge valve 101.

The synthetic kettle for producing the alkali copper by recovering the waste etching solution of the PCB comprises a rotating vertical rod 50, wherein the rotating vertical rod 50 is provided with an upper blade 51 positioned in the area surrounded by the first annular dam 2, a middle blade 52 positioned near the lower end opening of the area surrounded by the first annular dam 2, and a lower blade 53 positioned between the area surrounded by the first annular dam 2 and the funnel groove 10.

According to the synthesis kettle for producing the alkali copper by recovering the PCB etching waste liquid, the overflow port 91 with the upward opening is formed in one end, located in the synthesis kettle 1, of the liquid output channel 9.

According to the synthesis kettle for producing the alkali copper by recovering the PCB etching waste liquid, the vertical wall surface 12 is arranged between the lower edge of the inclined wall surface 7 and the upper edge of the funnel groove 10.

The synthesis kettle for producing the alkali copper by recovering the PCB etching waste liquid is characterized in that the synthesis kettle 1 is also provided with a thermometer, a pressure gauge, a detection port and a waste gas collecting hole.

As described above, the present application also provides a method for producing alkali copper by recovering waste PCB etching solution, comprising the synthesis kettle 1 of any one of claims 1 to 5, the method comprising the following steps:

adding hydrogen peroxide or a sodium chlorate solution into the acidic etching waste liquid, oxidizing cuprous chloride in the components of the acidic etching waste liquid, adjusting the pH value of the solution to 1.0-1.2 by using ammonia water or cuprammonia solution, and then carrying out solid-liquid separation to obtain an acidic liquid A for synthesizing the alkali copper;

an alkaline etching waste liquid impurity removal treatment step, namely adding an acidic liquid A and ammonia water into the alkaline etching waste liquid, adjusting the pH value of the alkaline etching waste liquid to 10.5-11, and then carrying out solid-liquid separation to obtain an alkaline liquid B for synthesizing the alkaline copper;

the method comprises the steps of synthesizing the alkali copper, namely preheating an acidic liquid A and an alkaline liquid B to 50-60 ℃, injecting the acidic liquid A into a synthesis kettle 1 through an acidic etching waste liquid input channel 3 and injecting the alkaline liquid B into the synthesis kettle 1 through an alkaline etching waste liquid input channel 4 to obtain a liquid C as a mother liquid for synthesizing the alkali copper, adjusting the flow rates of the acidic liquid A and the alkaline liquid B to enable the pH value of the liquid C to be 4.5-4.8, heating to 65-80 ℃, stirring the liquid, and opening a discharge valve 101 to discharge when the mother liquid in the alkali copper synthesis kettle is clearer and the alkali copper is dark green.

In the production method for producing the alkali copper by recovering the waste etching solution of the PCB, in the step of synthesizing the alkali copper, when the liquid level in the synthesis kettle 1 is close to the height of the liquid output channel 9, the discharge valve 101 is opened to discharge, otherwise, the acidic liquid A and the alkaline liquid B are continuously injected, and when the mother solution in the synthesis kettle of the alkali copper is clearer and the alkali copper is dark green, the discharge valve 101 is opened to discharge.

Compared with the prior art, the invention has the beneficial effects that:

1. the structure of the scheme is simple and easy to realize, and the arrangement of the first annular dam at the top end of the synthesis kettle is convenient for controlling the feeding range on one hand and carrying out solid-liquid separation outside the first annular dam on the other hand, so that the feeding is not easy to influence the solid-liquid separation; the arrangement of the rotary stirring piece is convenient for the dispersion of materials and the collision growth of alkali copper crystals; the arrangement of the second annular box dam and the inclined wall surface is convenient for liquid inside the second annular box dam not to drive liquid between the flow restriction opening/flow restriction channel and the liquid output channel easily, namely the liquidity of the liquid between the flow restriction opening/flow restriction channel and the liquid output channel is reduced, and for solid-liquid separation, heavy objects between the flow restriction opening/flow restriction channel and the liquid output channel can slide down from the inclined wall surface and are not easy to accumulate; the arrangement of the funnel groove at the lower end of the synthesis kettle is convenient for the accumulation of alkali copper, and the arrangement of the discharge valve is convenient for the output of alkali copper at the lower end and the continuous feeding of alkali copper at the upper end to synthesize the alkali copper.

2. The present case the setting of upper portion blade, middle part blade, lower part blade is convenient for right the first annular box dam enclose the region with liquid stirs between the funnel groove, and its stirring effect is better, and the dispersion of the material of being convenient for does benefit to the collision of alkali copper crystal and grows up.

3. The liquid output channel is positioned at one end in the synthesis kettle, an overflow port with an upward opening is arranged at one end in the synthesis kettle, so that the liquid level output height is further improved, and the liquid output channel outputs clarified liquid when solid-liquid separation is facilitated.

4. The production method of the alkali copper can be used for pretreating the acidic etching waste liquid, so that cuprous ions Cu in the acidic etching waste liquid can be conveniently treated⁺Oxidation to form positive copper ion Cu²⁺Thus, a better copper chloride solution is obtained after solid-liquid separation, and the alkaline etching waste liquid is pretreated, so that the solid-liquid separation is convenient to remove impurities in the alkaline etching waste liquid to obtain a copper ammonia solution; in the step of synthesizing the alkali copper, the acidic liquid A and the alkaline liquid B are preheated before being injected into the synthesis kettle, so that the temperature of the existing liquid C in the synthesis kettle is not greatly reduced after feeding, the synthesis of the alkali copper in the synthesis kettle is not easily influenced by the feeding, and the continuous production is facilitated; in addition, the production method of the alkali copper adopts a special synthesis kettle, and the arrangement of the first annular dam at the top end of the synthesis kettle is convenient for controlling the feeding range on one hand and carrying out solid-liquid separation outside the first annular dam on the other hand, so that the feeding is not easy to influence the solid-liquid separation; the above-mentionedThe arrangement of the rotary stirring piece is convenient for the dispersion of materials and the collision growth of the alkali copper crystals; the arrangement of the second annular box dam and the inclined wall surface is convenient for liquid inside the second annular box dam not to drive liquid between the flow restriction opening/flow restriction channel and the liquid output channel easily, namely the liquidity of the liquid between the flow restriction opening/flow restriction channel and the liquid output channel is reduced, and for solid-liquid separation, heavy objects between the flow restriction opening/flow restriction channel and the liquid output channel can slide down from the inclined wall surface and are not easy to accumulate; the arrangement of the funnel groove at the lower end of the synthesis kettle is convenient for the accumulation of alkali copper, and the arrangement of the discharge valve is convenient for the output of alkali copper at the lower end and the continuous feeding of alkali copper at the upper end to synthesize the alkali copper.

Drawings

FIG. 1 is a structural diagram of a synthesis kettle of the present invention.

Detailed Description

The features of the present invention and other related features are further described in detail below by way of examples to facilitate understanding by those skilled in the art:

as shown in figure 1, a synthesis kettle for producing alkali copper by recovering PCB board etching waste liquid, the top end of the synthesis kettle 1 is provided with a first annular dam 2 extending downwards, an acid etching waste liquid input channel 3 and an alkaline etching waste liquid input channel 4 for feeding liquid to the area surrounded by the first annular dam 2, a rotary stirring piece 5 extending downwards after passing through the area surrounded by the first annular dam 2, and a second annular dam 6 extending downwards and surrounding the first annular dam 2, the lower edge of the second annular dam 6 is higher than the lower edge of the first annular dam 2, the inner side wall of the synthesis kettle 1 is provided with an inclined wall surface 7 inclining upwards from inside to outside near the upper end position, the lower edge of the second annular dam 6 is positioned above the inclined wall surface 7, a flow limiting dam/flow limiting channel 8 is formed between the inclined wall surface 7 and the second annular dam 6, the side wall of the synthesis kettle 1 above the flow limiting port/flow limiting channel 8 is provided with a liquid output channel 9, the lower end of the synthesis kettle 1 is provided with a funnel groove 10 convenient for alkali copper accumulation, and the output end of the funnel groove 10 is connected with a discharge valve 101.

As mentioned above, the structure of the scheme is simple and easy to realize, and the arrangement of the first annular dam 2 at the top end of the synthesis kettle 1 is convenient for controlling the feeding range on one hand and for performing solid-liquid separation outside the first annular dam 2 on the other hand, so that feeding is not easy to influence the solid-liquid separation; the arrangement of the rotary stirring piece 5 is convenient for material dispersion and is beneficial to the collision growth of alkali copper crystals; the arrangement of the second annular dam 6 and the inclined wall surface 7 facilitates that the liquid inside the second annular dam 6 is not easy to drive the liquid between the restriction opening/restriction passage 8 and the liquid output passage 9, namely, the liquidity of the liquid between the restriction opening/restriction passage 8 and the liquid output passage 9 is reduced, and facilitates that the heavier objects between the restriction opening/restriction passage 8 and the liquid output passage 9 can slide down from the inclined wall surface 7 and are not easy to accumulate when solid-liquid separation is performed; the arrangement of the funnel groove 10 at the lower end of the synthesis kettle 1 is convenient for the accumulation of alkali copper, and the arrangement of the discharge valve 101 is convenient for the output of alkali copper at the lower end and the continuous feeding of alkali copper at the upper end to synthesize the alkali copper.

As mentioned above, in practical implementation, the rotating stirring element 5 includes a rotating vertical rod 50, and the rotating vertical rod 50 is provided with an upper blade 51 located in the area surrounded by the first annular dam 2, a middle blade 52 located near the lower end opening of the area surrounded by the first annular dam 2, and a lower blade 53 located between the area surrounded by the first annular dam 2 and the funnel trough 10.

As described above, the upper blades 51, the middle blades 52 and the lower blades 53 are arranged to facilitate stirring of the liquid between the region surrounded by the first annular box dam 2 and the funnel tank 10, so that the stirring effect is good, the dispersion of the material is facilitated, and the collision growth of the alkali copper crystals is facilitated.

As described above, in the specific implementation, the overflow port 91 with an upward opening is disposed at one end of the liquid output channel 9 located in the synthesis kettle 1, so as to further increase the liquid level output height, which is beneficial for the liquid output channel 9 to output clear liquid during solid-liquid separation.

As mentioned above, in practical application, a vertical wall 12 is provided between the lower edge of the inclined wall 7 and the upper edge of the funnel trough 10.

As mentioned above, in the specific implementation, the synthesis kettle 1 is further provided with a thermometer, a pressure gauge, a detection port and a waste gas collecting hole.

As mentioned above, the scheme also discloses a production method for recovering the PCB etching waste liquid to produce the alkali copper, which comprises the following steps:

adding hydrogen peroxide or a sodium chlorate solution into the acidic etching waste liquid, oxidizing cuprous chloride in the components of the acidic etching waste liquid, adjusting the pH value of the solution to 1.0-1.2 by using ammonia water or cuprammonia solution, and then carrying out solid-liquid separation to obtain an acidic liquid A for synthesizing the alkali copper;

an alkaline etching waste liquid impurity removal treatment step, namely adding a small amount of acidic liquid A and ammonia water into the alkaline etching waste liquid, adjusting the pH value of the alkaline etching waste liquid to 10.5-11, and then carrying out solid-liquid separation to obtain alkaline liquid B for synthesizing the alkaline copper;

the method comprises the steps of synthesizing the alkali copper, namely preheating an acidic liquid A and an alkaline liquid B to 50-60 ℃, injecting the acidic liquid A into a synthesis kettle 1 through an acidic etching waste liquid input channel 3 and injecting the alkaline liquid B into the synthesis kettle 1 through an alkaline etching waste liquid input channel 4 to obtain a liquid C as a mother liquid for synthesizing the alkali copper, adjusting the flow rates of the acidic liquid A and the alkaline liquid B to enable the pH value of the liquid C to be 4.5-4.8, heating to 65-80 ℃, stirring the liquid, and opening a discharge valve 101 to discharge when the mother liquid in the alkali copper synthesis kettle is clearer and the alkali copper is dark green.

As mentioned above, the production method of the alkali copper pretreats the acidic etching waste liquid, so as to facilitate the cuprous ions Cu in the acidic etching waste liquid⁺Oxidation to form positive copper ion Cu²⁺Thus, a better copper chloride solution is obtained after solid-liquid separation, and the alkaline etching waste liquid is pretreated, so that the solid-liquid separation is convenient to remove impurities in the alkaline etching waste liquid to obtain a copper ammonia solution; in the step of synthesizing the alkali copper, the acidic liquid A and the alkaline liquid B are preheated before being injected into the synthesis kettle 1,therefore, the temperature of the existing liquid C in the synthesis kettle 1 can not be greatly reduced after feeding, so that the synthesis of the alkali copper in the synthesis kettle 1 is not easily influenced by the feeding, and the continuous production is convenient; in addition, the production method of the alkali copper adopts the special synthesis kettle 1, and the arrangement of the first annular dam 2 at the top end of the synthesis kettle 1 is convenient for controlling the feeding range on one hand and carrying out solid-liquid separation outside the first annular dam 2 on the other hand, so that the feeding is not easy to influence the solid-liquid separation; the arrangement of the rotary stirring piece 5 is convenient for material dispersion and is beneficial to the collision growth of alkali copper crystals; the arrangement of the second annular dam 6 and the inclined wall surface 7 facilitates that the liquid inside the second annular dam 6 is not easy to drive the liquid between the restriction opening/restriction passage 8 and the liquid output passage 9, namely, the liquidity of the liquid between the restriction opening/restriction passage 8 and the liquid output passage 9 is reduced, and facilitates that the heavier objects between the restriction opening/restriction passage 8 and the liquid output passage 9 can slide down from the inclined wall surface 7 and are not easy to accumulate when solid-liquid separation is performed; the arrangement of the funnel groove 10 at the lower end of the synthesis kettle 1 is convenient for the accumulation of alkali copper, and the arrangement of the discharge valve 101 is convenient for the output of alkali copper at the lower end and the continuous feeding of alkali copper at the upper end to synthesize the alkali copper.

As mentioned above, in the specific implementation, the impurity removal treatment step of the acidic etching waste liquid and the impurity removal treatment step of the alkaline etching waste liquid can be respectively carried out by adopting a conventional reaction kettle and a solid-liquid separation mechanism.

As described above, in the specific implementation, in the step of synthesizing the alkali copper, when the liquid level in the synthesis kettle 1 is close to the height of the liquid output channel 9, the discharge valve 101 is opened to perform the discharge, otherwise, the acidic liquid a and the alkaline liquid B are continuously injected, and when the mother liquid in the alkali copper synthesis kettle is clearer and the alkali copper is dark green, the discharge valve 101 is opened to perform the discharge, which is favorable for the stable and continuous crystal discharge.

As mentioned above, the present application protects a synthetic kettle and a production method for recovering PCB etching waste liquid to produce alkali copper, and all technical schemes with the same or similar structure as the present application are shown to fall within the protection scope of the present application.