Automatic purification system for ferrous sulfate solution

Abstract

The utility model provides an automatic ferrous sulfate solution purification system which comprises a controller, a pure water tank, a flocculating agent tank, an ammonia water tank, a ferrous sulfate dissolving tank, a filter press, a ferrous sulfate solution tank, a pure water conveying system, a flocculating agent conveying system, an ammonia water conveying system, a dissolving solution conveying system and a steam conveying system, stirrers are arranged in the flocculant tank, the ammonia water tank and the ferrous sulfate dissolving tank. By utilizing the system, a high-purity sulfuric acid liquid solution can be obtained, so that the waste residue copperas is effectively utilized, and resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of ferrous sulfate production and processing, in particular to an automatic purification system for ferrous sulfate solution. Background Art

[0002] Ferrous sulfate heptahydrate, commonly known as green vitriol, is a light blue-green substance. It weathers and dehydrates in dry air to produce white ferrous sulfate powder. It readily oxidizes in moist air to produce brownish-yellow basic ferric sulfate.

[0003] Titanium dioxide is an important inorganic dye, and most manufacturers in my country use the sulfuric acid process to manufacture it. Generally, for every ton of titanium dioxide produced, 3.5-4.0 tons of ferrous sulfate are produced as a by-product. The waste residue green vitriol, a by-product of titanium dioxide production, contains not only ferrous salts but also various impurities such as Ti, Mg, Mn, Al, Si, and Cu. It cannot be directly utilized, and if it is piled up anywhere, it will not only seriously pollute the environment but also cause a waste of resources. High-purity ferrous sulfate is an important raw material for the preparation of ultrafine iron oxide, magnetic materials, iron oxide yellow, feed additives, etc. With the development of industry, the demand for high-purity ferrous sulfate is also increasing. How to remove impurities in the titanium dioxide by-product and obtain high-purity ferrous sulfate is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic purification system for ferrous sulfate solution, by which a high-purity sulfuric acid liquid solution can be obtained, thereby achieving effective utilization of waste slag green vitriol and saving resources.

[0005] The technical solution adopted by the utility model to solve its technical problems is: including a controller, a pure water tank, a flocculant tank, an ammonia water tank, a ferrous sulfate dissolving tank, a filter press, a ferrous sulfate solution tank, a pure water delivery system, a flocculant delivery system, an ammonia water delivery system, a dissolving liquid delivery system, and a steam delivery system. The pure water delivery system can realize the quantitative delivery of pure water in the pure water tank to the flocculant tank, the ammonia water tank, and the ferrous sulfate dissolving tank. The flocculant delivery system can realize the quantitative delivery of the flocculant dissolved solution in the flocculant tank to the ferrous sulfate dissolving tank. The ammonia water delivery system can realize the quantitative delivery of the flocculant dissolved solution in the flocculant tank to the ferrous sulfate dissolving tank. The ammonia solution in the ammonia water tank is quantitatively transported to the ferrous sulfate dissolving tank. The dissolving liquid transport system can transport the ferrous sulfate solution in the ferrous sulfate dissolving tank to the filter press. The steam transport system is used to provide high-temperature steam to the ferrous sulfate dissolving tank. The filtrate discharged from the filter press flows into the ferrous sulfate solution tank. A stirrer is provided in the flocculant tank, the ammonia water tank and the ferrous sulfate dissolving tank. The controller can realize the operation control of the pure water transport system, the flocculant transport system, the ammonia water transport system, the dissolving liquid transport system, the steam transport system and the stirrer.

[0006] Preferably, the pure water tank is connected to the pure water source through a pure water delivery pipe, and a first delivery pump is connected in series on the pure water delivery pipe. The pure water delivery system includes a first pipeline, a second pipeline, a third pipeline, and a fourth pipeline. One end of the first pipeline is connected to the pure water tank, and the other end is connected to the third pipeline and the fourth pipeline in parallel. The third pipeline is connected to the ammonia water tank, and the fourth pipeline is connected to the ferrous sulfate dissolution tank. A first manual valve and a second delivery pump are provided on the first pipeline, and a first pneumatic valve and a first flow meter are provided on both the third pipeline and the fourth pipeline. The second pipeline realizes the through connection between the ammonia water tank and the flocculant tank, and a first metering pump is provided on the second pipeline.

[0007] Furthermore, the flocculant delivery system includes a fifth pipeline, which realizes the through connection between the flocculant tank and the ferrous sulfate dissolution tank, and a second metering pump and a second pneumatic valve are provided on the fifth pipeline.

[0008] Furthermore, the ammonia water tank is connected to the ammonia water source through an ammonia water delivery pipe, and a second manual valve, a third delivery pump, a third pneumatic valve and a second flow meter are provided on the ammonia water delivery pipe. The ammonia water delivery system includes a sixth pipeline, and the sixth pipeline realizes the through connection between the ammonia water tank and the ferrous sulfate dissolution tank. A fourth delivery pump, a fourth pneumatic valve, a third flow meter and a third manual valve are provided on the sixth pipeline.

[0009] Furthermore, the steam delivery system includes a high-temperature steam delivery pipeline, which is connected to the heating device provided in the ferrous sulfate dissolving tank, and a fourth manual valve and a first electric valve are provided on the high-temperature steam delivery pipeline.

[0010] Furthermore, the dissolving liquid delivery system includes a ferrous sulfate delivery pipeline, the ferrous sulfate dissolving tank is connected to the liquid inlet end of the filter press through the ferrous sulfate delivery pipeline, and a fifth manual valve, a fifth pneumatic valve, a sixth manual valve and a fifth delivery pump are provided on the ferrous sulfate delivery pipeline; the liquid outlet end of the filter press is connected to the ferrous sulfate solution tank through a filtrate pipeline.

[0011] Furthermore, a first liquid level gauge and a second liquid level gauge are respectively arranged at the upper and bottom of the pure water tank, a third liquid level gauge is arranged at the bottom of the ammonia water tank, three pH sensors distributed from high to low are arranged on the side wall of the ferrous sulfate dissolution tank, a fourth liquid level gauge is arranged at the bottom of the ferrous sulfate dissolution tank, and a temperature sensor is arranged on the side wall of the ferrous sulfate dissolution tank.

[0012] The beneficial effects of the present invention are as follows: the present invention has a simple structure and is easy to manufacture and process; by utilizing the mutual coordination and control of the controller and the various execution components, the automatic production of high-purity ferrous sulfate solution can be realized, the waste slag green vitriol is recycled, and resources are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] In the figure: 1 pure water tank, 11 pure water delivery pipeline, 2 flocculant tank, 3 ammonia water tank, 31 ammonia water delivery pipeline, 4 ferrous sulfate dissolution tank, 41 steam delivery pipeline, 42 ferrous sulfate delivery pipeline, 5 filter press, 51 filtrate delivery pipeline, 6 ferrous sulfate solution tank, 7 agitator, 101 first pipeline, 102 second pipeline, 103 third pipeline, 104 fourth pipeline, 105 fifth pipeline, 106 sixth pipeline, 201 first delivery pump, 202 second delivery pump, 203 third delivery pump, 204 fourth delivery pump, 205 fifth delivery pump, 301 first manual valve, 302 second manual valve, 303 third manual valve, 304 fourth manual valve, 305 fifth manual valve, 306 sixth manual valve, 401 first pneumatic valve, 402 second pneumatic valve, 403 third pneumatic valve, 404 fourth pneumatic valve, 405 fifth pneumatic valve, 501 first flow meter, 502 second flow meter, 503 third flow meter, 601 first metering pump, 602 second metering pump, 701 first electric valve, 801 first liquid level gauge, 802 second liquid level gauge, 803 third liquid level gauge, 804 fourth liquid level gauge, 805 PH sensor, 806 temperature sensor. DETAILED DESCRIPTION

[0016] The following will be combined with specific embodiments and attached Figure 1 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the embodiments described are only some preferred embodiments of the present invention, not all embodiments. Those skilled in the art may make similar modifications without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] The utility model provides a ferrous sulfate solution automatic purification system (such as Figure 1As shown), it includes a controller, a pure water tank 1, a flocculant tank 2, an ammonia tank 3, a ferrous sulfate dissolving tank 4, a filter press 5, a ferrous sulfate solution tank 6, a pure water delivery system, a flocculant delivery system, an ammonia delivery system, a dissolved liquid delivery system, and a steam delivery system. The controller can use a PLC controller commonly used in the existing automation industry. The pure water tank 1, the flocculant tank 2, the ammonia tank 3, the ferrous sulfate dissolving tank 4 and the ferrous sulfate solution tank 6 are all tank structures, which have the function of storing liquids. Specifically, the pure water tank 1 is used to store pure water, the flocculant tank 2 is used to store flocculant solution, the ammonia tank 3 is used to store diluted ammonia solution, and the sulfuric acid The ferrous sulfate dissolving tank 4 is used to realize the dissolution and storage of ferrous sulfate, and the ferrous sulfate solution tank 6 realizes the storage of high-purity ferrous sulfate solution. The pure water delivery system can realize the quantitative delivery of pure water in the pure water tank 1 to the flocculant tank 2, the ammonia tank 3, and the ferrous sulfate dissolving tank 4. In the flocculant tank 2, the pure water is mixed with the flocculant to obtain a flocculant solution of a certain concentration. The ammonia solution is purified in the ammonia tank 3 to achieve dilution of ammonia water and obtain ammonia solution of a certain concentration. The flocculant delivery system can realize the quantitative delivery of the flocculant dissolved solution in the flocculant tank 2 to the ferrous sulfate dissolving tank 4, and the ammonia delivery system can realize the ammonia solution in the ammonia tank 3 to the ferrous sulfate dissolving tank 4. The quantitative transportation in the ferrous sulfate dissolving tank 4 is carried out, and the ammonia water and the ferrous sulfate heptahydrate powder react chemically in the ferrous sulfate dissolving tank 4, thereby realizing the separation of impurities in the ferrous sulfate heptahydrate. The dissolving liquid transportation system can transport the ferrous sulfate solution in the ferrous sulfate dissolving tank 4 to the filter press 5. The filter press 5 mainly realizes the mechanical filtration of impurities in the ferrous sulfate solution, and realizes the production of high-purity ferrous sulfate solution. In this specific embodiment, the filter press 5 can select a frame press. The steam transportation system is used to provide high-temperature steam to the ferrous sulfate dissolving tank 4, and the high-temperature steam is used to provide suitable temperature conditions for the chemical reaction in the ferrous sulfate dissolving tank 4. The filtered liquid discharged by the filter press 5 flows into the ferrous sulfate dissolving tank 4. into the ferrous sulfate solution tank 6, and an agitator 7 is provided in the flocculant tank 2, the ammonia water tank 3 and the ferrous sulfate dissolving tank 4. In the flocculant tank 2, the agitator 7 is used to achieve rapid mixing of pure water and flocculant. In the ammonia water tank 3, the agitator 7 is used to achieve rapid mixing of purified water and high-concentration ammonia water to achieve dilution of the high-concentration ammonia water. In the ferrous sulfate dissolving tank, the agitator 7 is used to achieve rapid mixing of ferrous sulfate heptahydrate powder and ammonia water, thereby improving the impurity removal chemical reaction of the ammonia water. The controller can realize the operation control of the pure water delivery system, the flocculant delivery system, the ammonia water delivery system, the dissolving liquid delivery system, the steam delivery system and the agitator 7.By utilizing the controller to automatically control the operation of the pure water delivery system, the flocculant delivery system, the ammonia delivery system, the dissolving liquid delivery system, the steam delivery system, and the agitator 7, the solution in the ferrous sulfate dissolving tank 4 can be intermittently delivered to the filter press 5. After filtering by the filter press 5, a high-purity ferrous sulfate solution is ultimately obtained, thereby realizing the reuse of ferrous sulfate heptahydrate and saving resources. At the same time, the process has a high degree of automation, thereby improving the production efficiency of the high-purity ferrous sulfate solution.

[0018] On the basis of the above embodiments, the specific implementation of the pure water delivery system is as follows: the pure water tank 1 is connected to the pure water source through a pure water delivery pipe 11, and a first delivery pump 201 is connected in series to the pure water delivery pipe 11. In actual application, the controller is electrically connected to the first delivery pump 201, and the controller is used to control the first delivery pump 201 to achieve regular replenishment of the water source in the pure water tank 1. In order to facilitate the use of the controller to control the water amount in the pure water tank 1, a first liquid level gauge 801 and a second liquid level gauge 802 are respectively provided on the upper and bottom parts of the pure water tank 1. When the second liquid level gauge 802 sends a signal that the water level is too low, the controller starts the first delivery pump 201 to realize the regular replenishment of the water source in the pure water tank 1. To replenish the pure water in the pure water tank 1, during the continuous movement of the first delivery pump 201, when the first liquid level gauge 801 sends a signal that the water level is too high, the controller stops the operation of the first delivery pump 201, and then completes the water replenishment process of the pure water tank 1. The pure water delivery system includes a first pipe 101, a second pipe 102, a third pipe 103, and a fourth pipe 104. One end of the first pipe 101 is connected to the pure water tank 1, and the other end is connected to the third pipe 103 and the fourth pipe 104 in parallel. The third pipe 103 is connected to the ammonia water tank 3, and the fourth pipe 104 is connected to the ferrous sulfate dissolution tank 4. The first pipe 101 is provided with a first manual valve 301 and a second delivery pump 202, and the third pipe 103 and the fourth pipe 104 are both provided with a first pneumatic valve 401 and a first flow meter 501. In the actual working process, the first manual valve 301 is in an open state, and the controller realizes the delivery of pure water to the ferrous sulfate dissolving tank 4 and the ammonia water tank 3 according to the set program. In the process of delivering pure water to the ferrous sulfate dissolving tank 4 or the ammonia water tank 3, the first flow meter 501 counts the pure water flow in real time. When the flow rate set in the program is reached, the controller realizes the closing of the corresponding first pneumatic valve 401 and the second delivery pump 202, and then realizes the ferrous sulfate dissolving tank 4 or the ammonia water tank 3. Quantitative delivery of pure water in the flocculant tank 2; the second pipeline 102 realizes the through connection between the ammonia water tank 3 and the flocculant tank 2, and a first metering pump 601 is set on the second pipeline. In actual application, the controller is electrically connected to the first metering pump 601, and the controller realizes the operation control of the first metering pump 601 according to the set program, and then realizes the quantitative delivery of pure water to the flocculant tank 2. The flocculant in the flocculant tank 2 is manually added or automatically added by weighing. After the quantitative addition of flocculant and pure water is completed, the controller starts the agitator 7 in the flocculant tank 2 to realize its internal stirring. The controller controls the running time of the agitator 7, and then completes the full mixing of the flocculant and pure water.

[0019] On the basis of the above embodiment, the specific implementation of the flocculant delivery system is as follows: the flocculant delivery system includes a fifth pipeline 105, and the fifth pipeline 105 realizes the through connection between the flocculant tank 2 and the ferrous sulfate dissolution tank 4. A second metering pump 602 and a second pneumatic valve 402 are provided on the fifth pipeline 105. The second metering pump 602 and the second pneumatic valve 402 are electrically connected to the controller. When it is necessary to quantitatively deliver the flocculant solution to the ferrous sulfate dissolution tank 4, the controller starts the second pneumatic valve 402 and the second metering pump 602, and uses the second metering pump 602 to realize the delivery of the flocculant solution to the ferrous sulfate dissolution tank 4. The controller controls the operation of the second metering pump 602 to realize the quantitative delivery of the flocculant solution. When the delivery is completed, the controller stops the operation of the second metering pump 602 and closes the second pneumatic valve 402 at the same time.

[0020] On the basis of the above embodiment, the specific implementation of the ammonia water delivery system is as follows: the ammonia water tank 3 is connected to the ammonia water source through an ammonia water delivery pipe 31, and a second manual valve 302, a third delivery pump 203, a third pneumatic valve 403 and a second flow meter 502 are provided on the ammonia water delivery pipe 31. The controller is electrically connected to the third delivery pump 203, the third pneumatic valve 403 and the second flow meter 502. When the controller needs to deliver ammonia water to the ammonia water tank 3 according to the set program, the second manual valve 302 is first opened, and then, The controller starts the third delivery pump 203, the third pneumatic valve 403 and the second flow meter 502, thereby realizing the delivery of ammonia water to the ammonia water tank 3. During the delivery process, the second flow meter 502 transmits data to the controller. When the set delivery volume of ammonia water is reached, the controller closes the third delivery pump 203 and the third pneumatic valve 403 to complete the quantitative delivery of ammonia water to the ammonia water tank 3. The ammonia water delivery system includes a sixth pipeline 106, which realizes the through connection between the ammonia water tank 3 and the ferrous sulfate dissolving tank 4. The sixth pipeline 106 is provided with a fourth delivery pump 204, a fourth pneumatic valve 404, a third flow meter 503 and a third manual valve 303. When the diluted ammonia solution in the ammonia water tank 3 is delivered, the third manual valve 303 is first opened. Then, the controller starts the fourth delivery pump 204, the fourth pneumatic valve 404 and the third flow meter 503 according to the set program. During the delivery process, the third flow meter 503 transmits the detection data to the controller in real time. When the delivery volume of the diluted ammonia solution is reached, the controller stops the fourth delivery pump 204, the fourth pneumatic valve 404 and the third flow meter 503. The operation of the four pneumatic valves 404 and the third flowmeter 503 realizes the quantitative delivery of the diluted ammonia solution to the ferrous sulfate dissolution tank 4. In order to facilitate the timely delivery of the ammonia solution in the ammonia tank 3, a third liquid level gauge 803 is set at the bottom of the ammonia tank 3. When the third liquid level gauge 803 detects that the liquid level in the ammonia tank 3 is too low, the controller starts the first metering pump 601, the third delivery pump 203 and the second flowmeter 502 to realize the quantitative delivery of pure water and concentrated ammonia solution to the ammonia tank 3, thereby realizing the replenishment of the diluted ammonia solution in the ammonia tank 3.

[0021] During the operation of the ferrous sulfate dissolving tank 4, the heat released by the high-temperature steam is used to control the reaction temperature in the ferrous sulfate dissolving tank 4. Specifically, the steam delivery system includes a high-temperature steam delivery pipe 41, which is connected to a heating device provided in the ferrous sulfate dissolving tank 4. The heating device can be a plurality of steam discharge pipes provided in the ferrous sulfate dissolving tank 4. The high-temperature steam is directly discharged into the solution in the ferrous sulfate dissolving tank 4 through the steam discharge pipe, thereby heating and heating the solution. A fourth manual valve 304 and a first electric valve 701 are provided on the high-temperature steam delivery pipe 41. In the actual operation process, The fourth manual valve 304 is in an open state. In order to facilitate the effective automatic control of the temperature in the ferrous sulfate dissolving tank 4, a temperature sensor 806 is set on the side wall of the ferrous sulfate dissolving tank 4. The temperature sensor 806 transmits the detected temperature value to the controller in real time. The controller compares the detected temperature value according to the set temperature parameter. When the detected temperature value exceeds the set range, the controller stops the first electric valve 701, thereby realizing the continued heating of the ferrous sulfate dissolving tank 4 by high-temperature steam. When the detected temperature value is lower than the set range, the controller starts the first electric valve 701 to realize the delivery of high-temperature steam, and then realizes the heating of the ferrous sulfate dissolving tank 4.

[0022] Ferrous sulfate heptahydrate reacts with ammonia water in the ferrous sulfate dissolving tank 4, thereby removing impurities in the ferrous sulfate heptahydrate. In order to effectively detect the pH value of the solution in the ferrous sulfate dissolving tank 4, three pH sensors 805 distributed from high to low are provided on the side wall of the ferrous sulfate dissolving tank 4. The controller takes the average value of the feedback results of the three pH sensors 805 as the final pH value detection data.

[0023] In the actual working process, pure water is first quantitatively transported into the ferrous sulfate dissolving tank 4. After the pure water is transported, the pure water is heated. When it is heated to the set temperature, ferrous sulfate heptahydrate powder is quantitatively added into the ferrous sulfate dissolving tank 4. The addition of ferrous sulfate heptahydrate powder can be manually weighed or automatically weighed. After the addition of ferrous sulfate heptahydrate powder, the stirrer 7 performs stirring. After stirring for a certain period of time, ammonia solution is quantitatively transported into the ferrous sulfate dissolving tank 4. During the process of transporting the ammonia solution, the stirrer 7 in the ferrous sulfate dissolving tank 4 always performs stirring, thereby facilitating the reaction between the ammonia solution and the ferrous sulfate heptahydrate powder. During the continuous reaction process, when the detected pH value reaches the set range, the flocculant solution is directed into the ferrous sulfate dissolving tank 4 to achieve the polymerization of impurities; after the flocculant solution is added, after a certain period of stirring, the impurity removal of the ferrous sulfate heptahydrate powder is completed. At this time, the ferrous sulfate delivery system can be used to realize the delivery of the ferrous sulfate solution to the filter press 5. Specifically, the dissolved liquid delivery system includes a ferrous sulfate delivery pipeline 42, and the ferrous sulfate dissolving tank 4 is connected to the liquid inlet end of the filter press 5 through the ferrous sulfate delivery pipeline 42. A fifth manual Valve 305, the fifth pneumatic valve 405, the sixth manual valve 306 and the fifth delivery pump 205. In the actual working process, the fifth manual valve 305 and the sixth manual valve 306 are in the open state. When the ferrous sulfate dissolving tank 4 completes the reaction, the controller starts the fifth pneumatic valve 405 and the fifth delivery pump 205. The fifth delivery pump 205 is used to continuously deliver high-pressure solution to the filter press 5. The filtering effect of the filter press 5 is used to filter the impurities adsorbed by the flocculant, thereby achieving the output of high-purity ferrous sulfate solution. During the continuous operation of the fifth delivery pump 205, in order to prevent the solution level in the ferrous sulfate solution tank 4 from being too low, Here, a fourth liquid level gauge 804 is provided at the bottom of the ferrous sulfate dissolving tank 4. When the fourth liquid level gauge 804 sends a low liquid level signal to the controller, the controller stops the operation of the fifth delivery pump 205, thereby completing the filtering work of the filter press 5; the liquid outlet end of the filter press 5 is connected to the ferrous sulfate solution tank 6 through the filtrate pipe 51, that is, when the filter press 5 is continuously working, the high-purity ferrous sulfate solution flowing out of its liquid outlet end is guided into the ferrous sulfate solution tank 6 through the filtrate pipe 51, thereby realizing the collection of the high-purity ferrous sulfate solution, and utilizing the high-purity ferrous sulfate solution to facilitate obtaining the ferrous sulfate powder raw material.

[0024] In the present invention, “left” and “right” are relative positions used for the convenience of describing positional relationships, and therefore cannot be understood as absolute positions to limit the scope of protection.

[0025] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

[0026] The above description, in conjunction with the accompanying drawings, details the preferred embodiments and examples of the present invention. However, the present invention is not limited to the above embodiments and examples. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the concept of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic purification system for ferrous sulfate solution, characterized in that: The invention comprises a controller, a pure water tank, a flocculant tank, an ammonia water tank, a ferrous sulfate dissolving tank, a filter press, a ferrous sulfate solution tank, a pure water delivery system, a flocculant delivery system, an ammonia water delivery system, a dissolving liquid delivery system, and a steam delivery system. The pure water delivery system can realize the quantitative delivery of pure water in the pure water tank to the flocculant tank, the ammonia water tank, and the ferrous sulfate dissolving tank. The flocculant delivery system can realize the quantitative delivery of the flocculant dissolved solution in the flocculant tank to the ferrous sulfate dissolving tank. The ammonia water delivery system can realize the quantitative delivery of the ammonia solution in the ammonia water tank to the sulfuric acid. Quantitative delivery in the ferrous sulfate dissolving tank, the dissolving liquid delivery system can deliver the ferrous sulfate solution in the ferrous sulfate dissolving tank to the filter press, the steam delivery system is used to provide high-temperature steam to the ferrous sulfate dissolving tank, the filtrate discharged from the filter press flows into the ferrous sulfate solution tank, and a stirrer is provided in the flocculant tank, the ammonia water tank and the ferrous sulfate dissolving tank. The controller can realize the operation control of the pure water delivery system, the flocculant delivery system, the ammonia water delivery system, the dissolving liquid delivery system, the steam delivery system and the stirrer.

2. A ferrous sulfate solution automatic purification system according to claim 1, characterized in that, The pure water tank is connected to the pure water source through a pure water delivery pipe, and a first delivery pump is connected in series to the pure water delivery pipe. The pure water delivery system includes a first pipeline, a second pipeline, a third pipeline, and a fourth pipeline. One end of the first pipeline is connected to the pure water tank, and the other end is connected to the third pipeline and the fourth pipeline in parallel. The third pipeline is connected to the ammonia water tank, and the fourth pipeline is connected to the ferrous sulfate dissolution tank. A first manual valve and a second delivery pump are provided on the first pipeline, and a first pneumatic valve and a first flow meter are provided on both the third pipeline and the fourth pipeline. The second pipeline realizes the through connection between the ammonia water tank and the flocculant tank, and a first metering pump is provided on the second pipeline.

3. A ferrous sulfate solution automatic purification system according to claim 2, characterized in that, The flocculant delivery system includes a fifth pipeline, which realizes the through connection between the flocculant tank and the ferrous sulfate dissolution tank. A second metering pump and a second pneumatic valve are arranged on the fifth pipeline.

4. A ferrous sulfate solution automatic purification system according to claim 3, characterized in that, The ammonia water tank is connected to the ammonia water source through an ammonia water delivery pipe, and a second manual valve, a third delivery pump, a third pneumatic valve and a second flow meter are provided on the ammonia water delivery pipe. The ammonia water delivery system includes a sixth pipeline, which realizes the through connection between the ammonia water tank and the ferrous sulfate dissolution tank. A fourth delivery pump, a fourth pneumatic valve, a third flow meter and a third manual valve are provided on the sixth pipeline.

5. A ferrous sulfate solution automatic purification system according to claim 4, characterized in that, The steam delivery system includes a high-temperature steam delivery pipeline, which is connected to the heating device provided in the ferrous sulfate dissolving tank. A fourth manual valve and a first electric valve are provided on the high-temperature steam delivery pipeline.

6. A ferrous sulfate solution automatic purification system according to claim 5, characterized in that, The dissolving liquid delivery system includes a ferrous sulfate delivery pipeline, the ferrous sulfate dissolving tank is connected to the liquid inlet end of the filter press through the ferrous sulfate delivery pipeline, and a fifth manual valve, a fifth pneumatic valve, a sixth manual valve and a fifth delivery pump are provided on the ferrous sulfate delivery pipeline; the liquid outlet end of the filter press is connected to the ferrous sulfate solution tank through a filtrate pipeline.

7. A kind of ferrous sulfate solution automatic purification system according to claim 6, it is characterized in that, in A first liquid level gauge and a second liquid level gauge are respectively arranged at the top and bottom of the pure water tank, a third liquid level gauge is arranged at the bottom of the ammonia water tank, three pH sensors distributed from high to low are arranged on the side wall of the ferrous sulfate dissolution tank, a fourth liquid level gauge is arranged at the bottom of the ferrous sulfate dissolution tank, and a temperature sensor is arranged on the side wall of the ferrous sulfate dissolution tank.

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