Preparation method of copper sulfate solution

Abstract

The preparation method of the copper sulfate solution of the present application comprises the following steps: mixing a first reaction solution and a first reaction gas to form a gas-liquid mixed fluid, accelerating the gas-liquid mixed fluid through an acceleration pipe and then spraying it into a reaction chamber containing a copper material. By the above method, the impact force formed by the gas-liquid mixed fluid entering the reaction chamber at a high speed is used to realize automatic stirring of the solution in the reaction chamber, so that the first reaction solution and the first reaction gas are fully in contact with the copper material, accelerating the reaction speed of the single copper to form copper ions, and fully improving the copper dissolving efficiency. In addition, since the dissolution of the single copper to form copper sulfate is an exothermic reaction, by controlling the preset flow rate to 260-350m / s, the copper ion dissolving efficiency is improved. 3 / h, and controlling the pH value of the first reaction solution to be 1-3, so that the heat generated by the rapid dissolution reaction can maintain the liquid temperature at 65°C-90°C, without the need for auxiliary heating with steam.

Description

Technical Field

[0001] The present application relates to the technical field of electrolyte preparation, and in particular to a method for preparing a copper sulfate solution. Background Art

[0002] The copper dissolving process is the first step in the production of electrolytic copper foil. In the copper dissolving process, the copper material reacts with the sulfuric acid solution to form a copper sulfate solution. In the prior art, the reaction between copper and sulfuric acid solution is generally achieved by immersion. Since the standard electrode potential of elemental copper / copper ions is 0.337V, in order to make it easier for elemental copper to replace hydrogen ions from the sulfuric acid solution, compressed air or oxygen needs to be blown into the copper dissolving tank, and steam is used to heat the copper dissolving tank to increase the reaction temperature. Summary of the invention

[0003] The purpose of this application is to provide a method for preparing a copper sulfate solution to solve the above-mentioned technical problems.

[0004] The technical solution of the present application is as follows: The present application provides a method for preparing a copper sulfate solution, comprising:

[0005] The first reaction solution and the first reaction gas are respectively delivered to the mixing pipe, so that the first reaction solution and the first reaction gas are mixed to form a gas-liquid mixed fluid when flowing through the mixing pipe;

[0006] The gas-liquid mixed fluid is transported to an accelerating pipe, so that the gas-liquid mixed fluid passes through the accelerating pipe at a preset flow rate for acceleration, wherein the inner diameter of the accelerating pipe gradually decreases in a direction from the fluid inlet to the fluid outlet;

[0007] Spraying the gas-liquid mixed fluid after passing through the acceleration device into a reaction chamber containing a copper material, so that the gas-liquid mixed fluid reacts with the copper material to form a copper sulfate solution;

[0008] The preset flow rate is 260-350m 3 / h, the pH value of the first reaction solution is 1-3.

[0009] Optionally, the first reaction solution includes a sulfuric acid solution and / or a copper sulfate solution.

[0010] Optionally, the first reaction gas includes at least one of air, oxygen or ozone.

[0011] Optionally, the volume ratio of the first reaction solution to the first reaction gas in the gas-liquid mixed fluid is 5-1.

[0012] Optionally, the diameter of the fluid inlet of the accelerating pipe is 1250-1750 mm, and the diameter of the fluid outlet of the accelerating pipe is 60-65 mm.

[0013] Optionally, the method for preparing the copper sulfate solution further comprises:

[0014] The copper sulfate solution in the reaction chamber is extracted by a circulation pump as the first reaction solution.

[0015] Optionally, the method for preparing the copper sulfate solution further comprises:

[0016] During the reaction process, the sulfuric acid solution is transported to below the injection port of the gas-liquid mixed fluid to replenish the sulfuric acid solution in the reaction chamber.

[0017] Optionally, the flow rate of the circulating pump is 200-230m 3 / h.

[0018] Optionally, the method for preparing the copper sulfate solution further comprises:

[0019] Extracting the mixed acid mist formed during the reaction process through the acid mist exhaust port located at the top of the reaction chamber;

[0020] Condensing water vapor in the mixed acid mist to obtain condensed water;

[0021] The condensed water is transported to a gas transport pipeline of the first reaction gas, so that the gas transport pipeline is cleaned during the process of the condensed water and the first reaction gas being transported to the mixing pipeline.

[0022] Optionally, the diameter of the gas delivery pipeline is 80-125 mm.

[0023] The preparation method of the copper sulfate solution of the present application comprises the following steps: mixing a first reaction solution and a first reaction gas to form a gas-liquid mixed fluid, accelerating the gas-liquid mixed fluid through an acceleration pipe and then spraying it into a reaction chamber containing a copper material. By the above method, the impact force formed by the gas-liquid mixed fluid entering the reaction chamber at a high speed is used to realize automatic stirring of the solution in the reaction chamber, so that the first reaction solution and the first reaction gas are fully in contact with the copper material, accelerating the reaction speed of the single copper to form copper ions, and fully improving the copper dissolving efficiency. In addition, since the dissolution of the single copper to form copper sulfate is an exothermic reaction, by controlling the preset flow rate to 260-350m / s, the copper ion dissolving efficiency is improved. 3 / h, and controlling the pH value of the first reaction solution to be 1-3, so that the heat generated by the rapid dissolution reaction can maintain the liquid temperature at 65°C-90°C, without the need for auxiliary heating with steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic flow chart of a method for preparing a copper sulfate solution according to an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of a mixing pipeline and an accelerating pipeline in a method for preparing a copper sulfate solution according to an embodiment of the present application;

[0026] Figure 3 This is an example diagram of a copper dissolving device in a method for preparing a copper sulfate solution according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] The present application is further described below in conjunction with the accompanying drawings and implementation methods.

[0028] This application example provides a method for preparing a copper sulfate solution. Figure 1 As shown, the preparation method of the copper sulfate solution comprises the following steps:

[0029] S11, delivering a first reaction solution and a first reaction gas to a mixing pipe respectively, so that the first reaction solution and the first reaction gas are mixed to form a gas-liquid mixed fluid when flowing through the mixing pipe;

[0030] S12, delivering the gas-liquid mixed fluid to an accelerating pipe, so that the gas-liquid mixed fluid passes through the accelerating pipe at a preset flow rate for acceleration, wherein the inner diameter of the accelerating pipe gradually decreases in a direction from the fluid inlet to the fluid outlet;

[0031] S13, spraying the gas-liquid mixed fluid after passing through the acceleration device into a reaction chamber containing a copper material, so that the gas-liquid mixed fluid reacts with the copper material to form a copper sulfate solution;

[0032] The preset flow rate is 260-350m 3 / h, the pH value of the first reaction solution is 1-3.

[0033] See also Figure 2 As shown, the first reaction solution can be pumped into the mixing pipe 1 through a liquid inlet pump or a circulation pump, and the first reaction gas is transported to the mixing pipe 1 through a gas delivery pipe 3. The first reaction solution and the first reaction gas are mixed to form a gas-liquid mixed fluid in the process of passing through the mixing pipe 1 and reaching the fluid inlet 21 of the acceleration pipe 2.

[0034] Please continue reading Figure 2As shown, the inner diameter of the accelerating pipe 2 gradually decreases from the fluid inlet 21 to the fluid outlet 22, the flow rate of the gas-liquid mixed fluid is the preset flow rate Q, the velocity of the gas-liquid mixed fluid is v, and the cross-section of the accelerating pipe 2 is s. Since Q=sv, as the inner diameter of the accelerating pipe 2 gradually decreases, s gradually decreases, and v gradually increases. In the process of the gas-liquid mixed fluid flowing through the accelerating pipe 2, the flow velocity increases sharply. When the high-speed gas-liquid mixed fluid enters the reaction chamber, it will naturally form a jet shape, disturb the solution in the reaction chamber, and realize automatic stirring. The first reaction gas fully contacts the copper material to oxidize the copper material to form copper oxide, and the copper oxide reacts with the sulfuric acid contained in the solution to form copper sulfate.

[0035] In this embodiment, the reaction of copper oxide and sulfuric acid contained in the solution is exothermic, and the heat generated by the rapid reaction can make the temperature of the solution in the reaction chamber reach 65°C to 90°C. Therefore, no external heating is required to maintain the reaction temperature required for oxidation of the copper material to form copper oxide, and the copper sulfate solution will not produce crystals.

[0036] In this embodiment, the pressure at the fluid outlet 22 of the accelerating pipe 2 is much lower than the pressure at the fluid inlet 21 of the accelerating pipe 2 , so that the gas-liquid mixed fluid in the mixing pipe 1 can more easily flow toward the accelerating pipe 2 , and the first reaction gas can more easily be sucked into the mixing pipe 1 .

[0037] The method for preparing the copper sulfate solution of the embodiment of the present application comprises mixing a first reaction solution and a first reaction gas to form a gas-liquid mixed fluid, accelerating the gas-liquid mixed fluid through an acceleration pipe and then spraying it into a reaction chamber containing a copper material. By the above method, the impact force formed by the gas-liquid mixed fluid entering the reaction chamber at a high speed is used to realize automatic stirring of the solution in the reaction chamber, so that the first reaction solution and the first reaction gas are fully in contact with the copper material, the reaction speed of the single copper to form copper ions is accelerated, and the copper dissolving efficiency is fully improved; and since the dissolution of the single copper to form copper sulfate is an exothermic reaction, by controlling the preset flow rate to 260-350m 3 / h, and controlling the pH value of the first reaction solution to be 1-3, so that the heat generated by the rapid dissolution reaction can maintain the liquid temperature at 65°C-90°C, without the need for auxiliary heating with steam.

[0038] As an embodiment, the first reaction solution may be a sulfuric acid solution. For example, the sulfuric acid solution may be pumped into the mixing pipe by a liquid inlet pump.

[0039] As an embodiment, the first reaction solution can be a copper sulfate solution. For example, the copper sulfate solution in the reaction chamber can be pumped into a mixing pipe by a circulation pump to form a gas-liquid mixed fluid, and then the gas-liquid mixed fluid can be sprayed into the reaction chamber by an acceleration pipe, and the cycle is repeated to achieve automatic stirring of the solution in the reaction chamber and accelerate the reaction of the copper material with sulfuric acid. It should be understood by those skilled in the art that since the reaction chamber is continuously replenished with sulfuric acid solution, the first reaction solution pumped out of the reaction chamber can be a mixture of copper sulfate solution and sulfuric acid solution.

[0040] As an embodiment, the first reaction solution may be a mixture of a copper sulfate solution pumped out from the reaction chamber and a sulfuric acid solution pumped out from the sulfuric acid solution storage tank.

[0041] As an embodiment, the first reaction gas may include at least one of air, oxygen or ozone. Oxygen or ozone can oxidize the copper material to form copper oxide when in contact with the copper material. In this embodiment, the gas delivery pipe 3 can be connected to a gas storage tank storing the first reaction gas; the gas delivery pipe 3 can also be connected to a preparation device for the first reaction gas; when the first reaction gas is air, one end of the gas delivery pipe 3 is connected to the mixing pipe 1, and the other end is a free end extending into the air.

[0042] As an implementation mode, in order to oxidize elemental copper to form copper oxide at a certain rate, it is necessary to provide sufficient first reaction gas into the reaction chamber, and the volume ratio of the first reaction solution and the first reaction gas in the gas-liquid mixed fluid entering the reaction chamber is 5-1.

[0043] As an implementation manner, the diameter of the fluid inlet of the accelerating pipe is 1250-1750 mm, and the diameter of the fluid outlet of the accelerating pipe is 60-65 mm.

[0044] As an implementation mode, the method for preparing the copper sulfate solution of this embodiment further includes the following steps before step S11:

[0045] S10, using a circulation pump to extract the copper sulfate solution in the reaction chamber as a first reaction solution.

[0046] In this embodiment, by extracting the copper sulfate solution in the reaction chamber as the first reaction solution, the cycle of the three processes of extracting the first reaction solution, mixing the first reaction solution with the first reaction gas, and spraying the gas-liquid mixed fluid into the reaction chamber can be realized, so that the solution in the reaction chamber is continuously in an automatic stirring state and the copper dissolving reaction is continuously carried out.

[0047] In some embodiments, see Figure 3 As shown, the preparation method of the copper sulfate solution of the present embodiment can be used as follows Figure 3The copper dissolving device shown includes an inner cylinder 32 which surrounds a reaction chamber 31, wherein a copper material is placed in the reaction chamber 31, and an outer cylinder 33 is sleeved outside the inner cylinder 32, wherein an outer chamber 34 is formed between the inner cylinder 32 and the outer cylinder 33, and a mesh 35 is arranged near the top of the inner cylinder 32, wherein the copper sulfate solution formed in the reaction chamber 31 enters the outer chamber 34 through the mesh 35, and an overflow pipe 37 is arranged near the top of the outer cylinder 33, wherein the copper sulfate solution formed by the copper dissolving reaction enters the outer chamber 34 and then flows out through the overflow pipe 37 to enter the next electrolysis process. The first pipe 361 of the circulation pump 36 is connected to the outer chamber 34, and the second pipe 362 of the circulation pump 36 is connected to the mixing pipe 1. After the copper sulfate solution formed by the reaction in the reaction chamber 31 enters the outer chamber 34, the circulation pump 36 extracts the copper sulfate solution in the outer chamber 34 into the mixing pipe 1, and the gas-liquid mixed fluid accelerated by the acceleration pipe 2 enters the reaction chamber 31 through the third pipe 37. In the above manner, the copper sulfate solution in the reaction chamber 31 is automatically stirred to achieve a copper dissolving reaction, while the copper sulfate solution in the outer chamber 34 is not stirred. The circulation pump 36 extracts the solution and the copper dissolving reaction is respectively carried out in the relatively separated outer chamber 34 and the reaction chamber 31 to reduce mutual interference.

[0048] In some embodiments, the flow rate of the circulating pump is 200-230 m 3 / h.

[0049] In some embodiments, the spray direction of the gas-liquid mixed fluid can be a vertical downward direction. After the gas-liquid mixed fluid is sprayed out, it stirs the liquid in the reaction chamber 31. The first reaction gas in the gas-liquid mixed fluid contacts the copper material during the process of rising in the vertical direction to oxidize the copper material.

[0050] In some embodiments, see Figure 3 As shown, the first reaction gas can be air, and the air does not need to be stored in a gas tank, but can be directly obtained from the environment. At this time, one end of the gas delivery pipe 3 is connected to the mixing pipe 1, and the other end is a free end extending into the air. The pressure at the fluid outlet 22 of the accelerating pipe 2 is much smaller than the pressure at the fluid inlet 21 of the accelerating pipe 2, so that the gas-liquid mixed fluid in the mixing pipe 1 is easier to flow to the accelerating pipe 2, and the air is easier to be sucked into the mixing pipe 1 through the gas delivery pipe 3. The diameter of the gas delivery pipe 3 is controlled to be 80-125 mm to control the volume of the air sucked in, so as to optimize the speed of the copper dissolving reaction.

[0051] As an implementation method, the preparation method of the copper sulfate solution of this embodiment also includes the following steps:

[0052] S14, during the reaction process, the sulfuric acid solution is transported to below the injection port of the gas-liquid mixed fluid to replenish the sulfuric acid solution into the reaction chamber.

[0053] In this embodiment, as the solution reaction proceeds, the sulfuric acid in the reaction chamber will continue to be consumed. In order to maintain the speed of the solution reaction, it is necessary to replenish the sulfuric acid solution into the reaction chamber, and the sulfuric acid solution is directly replenished below the injection port of the gas-liquid mixed fluid. During the injection process of the gas-liquid mixed fluid, the replenished sulfuric acid solution can be better dispersed in the reaction chamber, and the sulfuric acid is fully in contact with the copper material, which is beneficial to further increase the speed of the copper dissolving reaction and prevent the replenished sulfuric acid solution from flowing out of the overflow pipe.

[0054] As an implementation mode, the method for preparing the copper sulfate solution of this embodiment further includes the following steps after step S13:

[0055] S141, extracting the mixed acid mist formed during the reaction process through the acid mist exhaust port located at the top of the reaction chamber;

[0056] S142, condensing water vapor in the mixed acid mist to obtain condensed water;

[0057] S143, conveying the condensed water to the gas conveying pipeline of the first reaction gas, so that the gas conveying pipeline is cleaned during the process of conveying the condensed water and the first reaction gas to the mixing pipeline.

[0058] In this embodiment, copper sulfate will form copper sulfate crystals when the temperature is below 45°C. During the copper dissolving reaction, copper sulfate crystals may exist in the gas delivery pipeline. The accumulation of copper sulfate crystals will affect the inhalation of air, and the gas delivery pipeline needs to be cleaned.

[0059] In this embodiment, the extracted mixed acid mist may include acid gas, water vapor and unreacted first reaction gas, and the mixed acid mist is condensed, and the water vapor is condensed and liquefied to form condensed water.

[0060] In some embodiments, please refer to Figure 3 As shown, condensed water can be collected in a condensed water storage tank 40, and a condensed water delivery pipe 41 is arranged between the condensed water storage tank 40 and each gas delivery pipeline 3, one end of the condensed water delivery pipe 41 is connected to the condensed water storage tank 40, and the other end of the condensed water delivery pipe 41 is arranged close to the free end of the gas delivery pipeline 3. In the process of condensed water and air being sucked into the mixing pipeline 1 together, the copper sulfate crystals in the gas delivery pipeline 3 are flushed so that the copper sulfate crystals are dissolved in the water.

[0061] Example 1

[0062] This embodiment adopts Figure 3 The copper dissolving device shown is used to prepare a copper sulfate solution, which specifically includes the following steps:

[0063] Step 1, delivering a first reaction solution and a first reaction gas to a mixing pipe respectively, so that the first reaction solution and the first reaction gas are mixed to form a gas-liquid mixed fluid when flowing through the mixing pipe;

[0064] Step 2, conveying the gas-liquid mixed fluid into an accelerating pipe, so that the gas-liquid mixed fluid passes through the accelerating pipe at a preset flow rate for acceleration, wherein the inner diameter of the accelerating pipe gradually decreases in a direction from the fluid inlet to the fluid outlet;

[0065] Step 3, spraying the gas-liquid mixed fluid after passing through the acceleration device into a reaction chamber containing a copper material, so that the gas-liquid mixed fluid reacts with the copper material to form a copper sulfate solution;

[0066] Among them, the preset flow rate is 350m 3 / h, the pH value of the first reaction solution is 1.

[0067] Wherein, the diameter of the fluid inlet of the accelerating pipe is 1250-1750 mm, and the diameter of the fluid outlet of the accelerating pipe is 60-65 mm.

[0068] Among them, the flow rate of the circulation pump is 200~230m 3 / h.

[0069] The copper dissolving reaction rate in this embodiment is 3.6 mg / L.

[0070] Example 2

[0071] This embodiment adopts Figure 3 The copper dissolving device shown is used to prepare a copper sulfate solution, which specifically includes the following steps:

[0072] Step 1, delivering a first reaction solution and a first reaction gas to a mixing pipe respectively, so that the first reaction solution and the first reaction gas are mixed to form a gas-liquid mixed fluid when flowing through the mixing pipe;

[0073] Step 2, conveying the gas-liquid mixed fluid into an accelerating pipe, so that the gas-liquid mixed fluid passes through the accelerating pipe at a preset flow rate for acceleration, wherein the inner diameter of the accelerating pipe gradually decreases in a direction from the fluid inlet to the fluid outlet;

[0074] Step 3, spraying the gas-liquid mixed fluid after passing through the acceleration device into a reaction chamber containing a copper material, so that the gas-liquid mixed fluid reacts with the copper material to form a copper sulfate solution;

[0075] Among them, the preset flow rate is 260m 3 / h, the pH value of the first reaction solution is 3.

[0076] Wherein, the diameter of the fluid inlet of the accelerating pipe is 1250-1750 mm, and the diameter of the fluid outlet of the accelerating pipe is 60-65 mm.

[0077] Among them, the flow rate of the circulation pump is 200~230m 3 / h.

[0078] The copper dissolving reaction rate in this embodiment is 1.6 mg / L.

[0079] Example 3

[0080] This embodiment adopts Figure 3 The copper dissolving device shown is used to prepare a copper sulfate solution, which specifically includes the following steps:

[0081] Step 1, delivering a first reaction solution and a first reaction gas to a mixing pipe respectively, so that the first reaction solution and the first reaction gas are mixed to form a gas-liquid mixed fluid when flowing through the mixing pipe;

[0082] Step 2, conveying the gas-liquid mixed fluid into an accelerating pipe, so that the gas-liquid mixed fluid passes through the accelerating pipe at a preset flow rate for acceleration, wherein the inner diameter of the accelerating pipe gradually decreases in a direction from the fluid inlet to the fluid outlet;

[0083] Step 3, spraying the gas-liquid mixed fluid after passing through the acceleration device into a reaction chamber containing a copper material, so that the gas-liquid mixed fluid reacts with the copper material to form a copper sulfate solution;

[0084] Among them, the preset flow rate is 300m 3 / h, the pH value of the first reaction solution is 2.

[0085] Wherein, the diameter of the fluid inlet of the accelerating pipe is 1250-1750 mm, and the diameter of the fluid outlet of the accelerating pipe is 60-65 mm.

[0086] Among them, the flow rate of the circulation pump is 200~230m 3 / h.

[0087] The copper dissolving reaction rate in this embodiment is 2.2 mg / L.

[0088] Comparative Example 1

[0089] This embodiment adopts Figure 3 The copper dissolving device shown is used to prepare a copper sulfate solution, which specifically includes the following steps:

[0090] Step 1, delivering a first reaction solution and a first reaction gas to a mixing pipe respectively, so that the first reaction solution and the first reaction gas are mixed to form a gas-liquid mixed fluid when flowing through the mixing pipe;

[0091] Step 2, conveying the gas-liquid mixed fluid into an accelerating pipe, so that the gas-liquid mixed fluid passes through the accelerating pipe at a preset flow rate for acceleration, wherein the inner diameter of the accelerating pipe gradually decreases in a direction from the fluid inlet to the fluid outlet;

[0092] Step 3, spraying the gas-liquid mixed fluid after passing through the acceleration device into a reaction chamber containing a copper material, so that the gas-liquid mixed fluid reacts with the copper material to form a copper sulfate solution;

[0093] Among them, the preset flow rate is 400m 3 / h, the pH value of the first reaction solution is 1.

[0094] Wherein, the diameter of the fluid inlet of the accelerating pipe is 1250-1750 mm, and the diameter of the fluid outlet of the accelerating pipe is 60-65 mm.

[0095] Among them, the flow rate of the circulation pump is 200~230m 3 / h.

[0096] The copper dissolving reaction rate in this embodiment is 3.6 mg / L.

[0097] Comparative Example 2

[0098] This embodiment adopts Figure 3 The copper dissolving device shown is used to prepare a copper sulfate solution, which specifically includes the following steps:

[0099] Step 1, delivering a first reaction solution and a first reaction gas to a mixing pipe respectively, so that the first reaction solution and the first reaction gas are mixed to form a gas-liquid mixed fluid when flowing through the mixing pipe;

[0100] Step 2, conveying the gas-liquid mixed fluid into an accelerating pipe, so that the gas-liquid mixed fluid passes through the accelerating pipe at a preset flow rate for acceleration, wherein the inner diameter of the accelerating pipe gradually decreases in a direction from the fluid inlet to the fluid outlet;

[0101] Step 3, spraying the gas-liquid mixed fluid after passing through the acceleration device into a reaction chamber containing a copper material, so that the gas-liquid mixed fluid reacts with the copper material to form a copper sulfate solution;

[0102] Among them, the preset flow rate is 200m 3 / h, the pH value of the first reaction solution is 3.5.

[0103] Wherein, the diameter of the fluid inlet of the accelerating pipe is 1250-1750 mm, and the diameter of the fluid outlet of the accelerating pipe is 60-65 mm.

[0104] Among them, the flow rate of the circulation pump is 200~230m 3 / h.

[0105] The copper dissolving reaction rate in this embodiment is 1.1 mg / L.

[0106] According to Examples 1 to 3 and Comparative Examples 1 to 2, it can be seen that the preset flow rate is controlled to 260-350m 3 / h, and controlling the pH value of the first reaction solution to 1-3 can increase the reaction rate of the solution.

[0107] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A method for preparing a copper sulfate solution, characterized in that: include: The first reaction solution and the first reaction gas are respectively delivered to a mixing pipe, so that the first reaction solution and the first reaction gas are mixed to form a gas-liquid mixed fluid when flowing through the mixing pipe; the volume ratio of the first reaction solution to the first reaction gas in the gas-liquid mixed fluid is 5 to 1, the first reaction gas includes air, and the first reaction gas is delivered to the mixing pipe through a gas delivery pipe, one end of the gas delivery pipe is connected to the mixing pipe, and the other end is a free end extending into the air; The gas-liquid mixed fluid is transported to an accelerating pipe, so that the gas-liquid mixed fluid passes through the accelerating pipe at a preset flow rate for acceleration, wherein the inner diameter of the accelerating pipe gradually decreases in a direction from the fluid inlet to the fluid outlet; Spraying the gas-liquid mixed fluid after passing through the acceleration pipe into a reaction chamber containing a copper material, so that the gas-liquid mixed fluid reacts with the copper material to form a copper sulfate solution; Extracting the mixed acid mist formed during the reaction process through the acid mist exhaust port located at the top of the reaction chamber; Condensing water vapor in the mixed acid mist to obtain condensed water; delivering condensed water to a gas delivery pipeline of the first reaction gas, so that the gas delivery pipeline is cleaned during the process of delivering the condensed water and the first reaction gas to the mixing pipeline; The preset flow rate is 260-350m 3 / h, the pH value of the first reaction solution is 1-3.

2. The preparation method of copper sulfate solution according to claim 1, characterized in that The first reaction solution includes a sulfuric acid solution and / or a copper sulfate solution.

3. The preparation method of copper sulfate solution according to claim 1, characterized in that The diameter of the fluid inlet of the accelerating pipe is 1250-1750 mm, and the diameter of the fluid outlet of the accelerating pipe is 60-65 mm.

4. The preparation method of copper sulfate solution according to claim 1, characterized in that The preparation method of the copper sulfate solution also includes: The copper sulfate solution in the reaction chamber is extracted by a circulation pump as the first reaction solution.

5. The method for preparing copper sulfate solution according to claim 4, wherein The preparation method of the copper sulfate solution also includes: During the reaction process, the sulfuric acid solution is transported to below the injection port of the gas-liquid mixed fluid to replenish the sulfuric acid solution in the reaction chamber.

6. The method for preparing copper sulfate solution according to claim 4, characterized in that: The flow rate of the circulating pump is 200-230m 3 / h.

7. The method for preparing copper sulfate solution according to claim 1, characterized in that: The diameter of the gas delivery pipeline is 80-125 mm.

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