A modification device for preparing polyferric sulfate by combined oxidation method and its use method

Abstract

The invention discloses a modification device for preparing polyferric sulfate by a combined oxidation process and a use method thereof, which is applied in the technical field of polyferric sulfate preparation technology. The invention provides a recovery mechanism, wherein a preparation component can prepare polyferric sulfate by a hydrogen peroxide oxidation process, a storage component can temporarily store oxygen generated by the hydrogen peroxide oxidation process, and can re-prepare hydrogen peroxide by an oxygen cathode reduction process on the oxygen, and transport the hydrogen peroxide to the preparation component for cyclic preparation, a cathode component can catalyze the oxygen cathode reduction process, a calcium addition component can temporarily store and transport raw materials for the oxygen cathode reduction process, and a modification mechanism is provided, wherein a transport component can transport modified acid liquid in an acid addition component to a recovery mechanism for modified preparation of polyferric sulfate, a switching component can switch modified acid liquids of different concentrations in the acid addition component, and the acid addition component can transport the modified acid liquid to the recovery mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of polyferric sulfate preparation technology, and in particular relates to a modification device for preparing polyferric sulfate by a combined oxidation process and a use method thereof. Background Art

[0002] Polyferric sulfate is an inorganic polymer coagulant with excellent performance. Its morphology is a light yellow amorphous powdery solid. It is highly soluble in water. A 10% aqueous solution is a reddish brown transparent solution. It is hygroscopic. When preparing polyferric sulfate, a combined oxidation method is used, which includes but is not limited to the hydrogen peroxide oxidation preparation method. During the preparation process, ferrous sulfate, water and sulfuric acid are added to a reactor according to the production volume and the required basicity. When the temperature rises to 30 to 45 degrees Celsius, hydrogen peroxide is slowly added to the bottom of the reactor through a feeding tube during stirring. The hydrogen peroxide quickly oxidizes the ferrous iron to trivalent iron. Sampling and analysis are performed. When the ferrous iron concentration drops to the specified concentration, the reaction is stopped. When polyferric sulfate is modified to modified polyferric sulfate, the modified polyferric sulfate is produced on the basis of polyferric sulfate by changing or adjusting the composition and ratio of the acid so that the hydroxyl group can more easily replace the sulfate ion and insert into the network structure of the ferric sulfate molecular cluster, thereby increasing the basicity and molecular polymerization degree of the product.

[0003] At present, the Chinese invention with publication number CN104478050B discloses a preparation method and application of modified polyferric sulfate for treating industrial wastewater. This invention provides a preparation method of modified polyferric sulfate, which uses kaolin and talc to modify polyferric sulfate. The modified polyferric sulfate prepared by this invention is used in the deep treatment process of waste paper papermaking wastewater, with high pollutant removal rate and good color removal effect. The COD removal rate of the modified polyferric sulfate in the wastewater is as high as 71.9-75 %, SS removal rate is as high as 64-75%, and chroma removal rate is as high as 88.3%-96.9%. Under the same conditions, the COD removal rate is increased by 8.3%-11.2%, the SS removal rate is increased by 9%-12.5%, and the chroma removal rate is increased by 6.9%-8.3% compared with the use of polyferric sulfate; the flocculation effect is fast, and the amount of modified polyferric sulfate used is greatly reduced compared with polyferric sulfate to achieve the same decolorization effect, and the amount of chemical sludge produced is also less, which saves costs and simplifies the process.

[0004] The existing modification equipment and use method for preparing polyferric sulfate by combined oxidation method have the following disadvantages when preparing polyferric sulfate:

[0005] 1. It is impossible to quickly replace the modified acid solution containers with different ratios, which makes it difficult to flexibly adjust the preparation of modified polyferric sulfate;

[0006] 2. There is a lack of a rapid preparation structure for hydrogen peroxide, and the oxygen generated after the preparation of polyferric sulfate cannot be collected and recovered. Summary of the Invention

[0007] The present invention aims to modify an existing combined oxidation process for preparing polyferric sulfate and its use method, which has the following advantages:

[0008] 1. Modified acid containers with different ratios can be quickly replaced, which facilitates flexible adjustment of the preparation of modified polyferric sulfate;

[0009] 2. It has a rapid preparation structure for hydrogen peroxide, which can collect and recycle the oxygen generated after the preparation of polyferric sulfate.

[0010] The above technical purpose of the present invention is achieved through the following technical solutions: a modification device for preparing polyferric sulfate by a combined oxidation method, comprising a recovery mechanism and a modification mechanism, wherein the modification mechanism is bolted to the front side of the recovery mechanism, the recovery mechanism comprises a preparation component, a storage component, a cathode component and a calcium adding component, the storage component is connected to the rear side of the preparation component, the cathode component is bolted to the surface of the storage component, and the calcium adding component is connected to the right side of the cathode component, the modification mechanism comprises a conveying component, a switching component, an acid adding component and a self-locking component, the conveying component is connected to the front side of the preparation component, the switching component is bolted to the bottom of the conveying component, the acid adding component is connected to the front and rear sides of the top of the switching component, the self-locking component is connected to the bottom of the acid adding component, and the bottom of the self-locking component is clamped with the top of the conveying component.

[0011] By adopting the above technical solution, by setting up a recovery mechanism and a modification mechanism, the preparation component can prepare polyferric sulfate using a hydrogen peroxide oxidation method, and recover oxygen to be reduced to hydrogen peroxide by an oxygen cathode reduction method for cyclic preparation. The modification mechanism can store modified acid solutions of different concentrations and modify polyferric sulfate to different concentrations.

[0012] The present invention is further configured as follows: the preparation assembly includes a preparation tank, an exhaust fan and an air supply pipe, the exhaust fan is connected to the top of the preparation tank, and the air supply pipe is connected to the top of the exhaust fan.

[0013] By adopting the above technical solution, the polyferric sulfate raw material and hydrogen peroxide can be stored and prepared by setting up a preparation tank, the exhaust fan can collect the oxygen generated during the preparation process, and the air pipe can transport the collected oxygen to the storage component.

[0014] The present invention is further configured as follows: the storage assembly includes an air inlet support plate, an air outlet support plate and a reaction tank, the air inlet support plate is bolted to the right side of the preparation tank, the air outlet support plate is bolted to the side of the rear side of the preparation tank close to the air inlet support plate, the reaction tank is connected to the bottom of the air inlet support plate, and the front side of the reaction tank is connected to the air outlet support plate.

[0015] By adopting the above technical solution and setting up a storage component, the air inlet support plate can support and limit the reaction tank, and can transport oxygen into the reaction tank. The air outlet support plate can further support and limit the air outlet support plate, and can transport the hydrogen peroxide that has completed the reaction in the reaction tank to the preparation tank. The reaction tank can temporarily store and prepare the oxygen and the reaction materials transported by the calcium addition component.

[0016] The present invention is further configured as follows: the cathode assembly includes a connecting ring, an electrolyzer and positive and negative electrode plates, the connecting ring is bolted to the surface of the reaction tank, the electrolyzer is bolted to the rear side of the connecting ring, the positive and negative electrode plates are bolted to the inner wall of the connecting ring, and the rear sides of the positive and negative electrode plates are bolted to the electrolyzer.

[0017] By adopting the above technical solution, by setting up the cathode assembly, the connecting ring can support and limit the electrolyzer and the positive and negative plates. After being powered on, the electrolyzer can convert electrical energy into ions and then transport the ions to the positive and negative plates. The positive and negative plates can transmit the ions into the reaction tank and catalyze the materials and oxygen in the reaction tank at the same time.

[0018] The present invention is further configured as follows: the calcium adding component includes a delivery pump, a storage tank and a feed port, the delivery pump is connected to the right side of the connecting ring, the left side of the delivery pump is connected to the reaction tank, the storage tank is connected to the surface of the delivery pump, and the feed port is opened on the right side of the storage tank.

[0019] By adopting the above technical solution, by setting up a calcium adding component, the delivery pump can transport the material in the storage tank, the storage tank can temporarily store the oxygen cathode reduction method material, and the feed port can facilitate the replenishment of the preparation material in the storage tank. The oxygen cathode reduction method is to place a strong alkaline electrolyte into the reaction tank, so that oxygen is reduced to perhydroxyl anions at the cathode, and then converted into hydrogen peroxide in the reaction tank. The process is to use the precipitation of calcium salt to generate calcium peroxide, filter and decompose it, and use carbon dioxide to decompose it to produce hydrogen peroxide.

[0020] The present invention is further configured as follows: the conveying assembly includes a limiting frame, a clamping groove and a liquid pump, the limiting frame is bolted to the front side of the preparation tank, the clamping groove is opened on the front side of the limiting frame, the clamping groove is opened at the bottom of the inner wall of the limiting frame, the liquid pump is connected to the bottom of the limiting frame, and the bottom of the clamping groove is connected to the liquid pump.

[0021] By adopting the above technical solution, by setting up a conveying component, the limit frame can support and limit the switching component, the card slot can be self-lockingly connected with the self-locking component, and the liquid pump can pump the modified acid liquid into the recovery mechanism after power is turned on.

[0022] The present invention is further configured as follows: the switching assembly includes a servo motor, a rotating rod and a connecting plate, the servo motor is bolted to the front side of the bottom of the limit frame, the rotating rod is bolted to the output end of the top of the servo motor, the surface of the rotating rod is rotatably connected to the limit frame, and the connecting plate is bolted to the top of the rotating rod.

[0023] By adopting the above technical solution and setting a switching component, the servo motor can convert electrical energy into rotational mechanical energy after being powered on, and then transmit the mechanical energy to the rotating rod. The rotating rod will rotate the connecting plate, thereby changing the position of the acid adding component and switching the acid adding component.

[0024] The present invention is further configured as follows: the acid adding assembly includes a liquid storage tank, a liquid inlet and a limiting sleeve, the liquid storage tank is connected to the front and rear sides of the top of the connecting plate, the liquid inlet is opened at the top of the liquid storage tank, and the limiting sleeve is bolted to the bottom of the liquid storage tank.

[0025] By adopting the above technical solution and setting up an acid adding component, the liquid storage tank can store up to two modified acid solutions of different concentrations. The liquid inlet can facilitate the delivery of the modified acid solution into the liquid storage tank, and the limit sleeve can limit the self-locking component.

[0026] The present invention is further configured as follows: the self-locking assembly includes a connecting tube, a clamping sleeve and a reset spring, the top of the connecting tube is connected to the liquid storage tank, the clamping sleeve is connected to the surface of the connecting tube, the top of the clamping sleeve is sleeved on the surface of the limiting sleeve, the reset spring is bolted to the side of the inner wall of the clamping sleeve away from the connecting tube, and the top of the reset spring is bolted to the limiting sleeve.

[0027] By adopting the above technical solution and setting a self-locking component, the connecting pipe can transport the modified acid liquid in the liquid storage tank to the liquid pump, the clamping sleeve can be clamped with the clamping groove, and the reset spring can reset the displacement of the clamping sleeve, so that the clamping sleeve can be self-lockingly connected with the clamping groove.

[0028] A method for preparing polyferric sulfate by a combined oxidation process comprises the following steps:

[0029] S1. Preparation of polyferric sulfate and recycling of hydrogen peroxide: First, the recovery mechanism is powered on and started, and the raw materials for polyferric sulfate preparation and hydrogen peroxide are placed in the preparation tank for preparation. After the polyferric sulfate and hydrogen peroxide react, the oxygen is pumped to the air pipe by the exhaust fan and then enters the reaction tank. The materials required for the oxygen cathode reduction method are placed in the storage tank. The delivery pump will transport the materials for the oxygen cathode reduction method to the reaction tank to react with the oxygen. The electrolyzer drives the positive and negative plates, allowing the positive and negative plates to perform the oxygen cathode reduction method on the oxygen, thereby producing hydrogen peroxide from the oxygen and the materials for the oxygen cathode reduction method. The prepared hydrogen peroxide will enter the preparation tank for recycling;

[0030] S2. Adjust the modification operation of polyferric sulfate: first, power on the modification mechanism and start it, inject the required high-concentration modified acid solution and low-concentration modified acid solution into the two liquid storage tanks respectively, and the liquid pump will pump the modified acid solution in the liquid storage tank to the recovery mechanism for reaction. When the liquid storage tank needs to be replaced, the servo motor will rotate the connecting plate, and the connecting plate will drive the liquid storage tank to rotate, move the current liquid storage tank, and then transfer another liquid storage tank to the card slot until the card sleeve is connected to the card slot, so that the replacement of the modified acid storage tanks with different concentrations can be changed.

[0031] In summary, the present invention has the following beneficial effects:

[0032] 1. By setting up a recycling mechanism, the preparation component can prepare polyferric sulfate by hydrogen peroxide oxidation method, the storage component can temporarily store the oxygen generated by the hydrogen peroxide oxidation method, and can re-prepare hydrogen peroxide by oxygen cathode reduction method on the oxygen, and then transport the hydrogen peroxide to the preparation component for recycling preparation, the cathode component can catalyze the oxygen cathode reduction method, and the calcium addition component can temporarily store and transport the raw materials of the oxygen cathode reduction method;

[0033] 2. By setting up a modification mechanism, the conveying component can transport the modified acid liquid in the acid adding component to the recovery mechanism for polyferric sulfate modification preparation. The switching component can switch the modified acid liquid of different concentrations in the acid adding component. The acid adding component can transport the modified acid liquid to the recovery mechanism. The self-locking component can limit the acid adding component after the acid adding component completes the switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is a schematic structural diagram of the recovery mechanism of the present invention;

[0036] Figure 3 It is a schematic diagram of the structure of the preparation assembly of the present invention;

[0037] Figure 4 It is a schematic diagram of the storage assembly structure of the present invention;

[0038] Figure 5 It is a schematic structural diagram of the cathode assembly and calcium addition assembly of the present invention;

[0039] Figure 6 It is a schematic structural diagram of the modification mechanism of the present invention;

[0040] Figure 7 It is a schematic structural diagram of the conveying assembly of the present invention;

[0041] Figure 8 It is a schematic diagram of the switching component structure of the present invention;

[0042] Figure 9 It is a schematic structural diagram of the acid addition assembly of the present invention;

[0043] Figure 10 It is a schematic structural diagram of the self-locking assembly of the present invention;

[0044] Figure 11 It is a schematic diagram of the method of use of the present invention.

[0045] Reference numerals: 1, recovery mechanism; 101, preparation assembly; 1011, preparation tank; 1012, exhaust fan; 1013, air pipe; 102, storage assembly; 1021, air inlet support plate; 1022, air outlet support plate; 1023, reaction tank; 103, cathode assembly; 1031, connecting ring; 1032, electrolyzer; 1033, positive and negative plates; 104, calcium addition assembly; 1041, delivery pump; 1042, storage tank; 1043, Feeding port; 2. Modification mechanism; 201. Conveying assembly; 2011. Limiting frame; 2012. Snap-fit groove; 2013. Liquid pump; 202. Switching assembly; 2021. Servo motor; 2022. Rotating rod; 2023. Connecting plate; 203. Acid adding assembly; 2031. Liquid storage tank; 2032. Liquid inlet; 2033. Limiting sleeve; 204. Self-locking assembly; 2041. Connecting pipe; 2042. Snap-fit sleeve; 2043. Return spring. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below with reference to the accompanying drawings.

[0047] Example 1:

[0048] refer to Figure 1-5A modification device for preparing polyferric sulfate by a combined oxidation method includes a recovery mechanism 1, which includes a preparation component 101, a storage component 102, a cathode component 103 and a calcium adding component 104. The storage component 102 is connected to the rear side of the preparation component 101, the cathode component 103 is bolted to the surface of the storage component 102, and the calcium adding component 104 is connected to the right side of the cathode component 103. By setting up the recovery mechanism 1, the preparation component 101 can prepare polyferric sulfate by a hydrogen peroxide oxidation method, the storage component 102 can temporarily store the oxygen generated by the hydrogen peroxide oxidation method, and can re-prepare the oxygen into hydrogen peroxide by an oxygen cathode reduction method, and transport the hydrogen peroxide to the preparation component 101 for circulation preparation, the cathode component 103 can catalyze the oxygen cathode reduction method, and the calcium adding component 104 can temporarily store and transport the raw materials of the oxygen cathode reduction method.

[0049] like Figure 3 As shown, the preparation component 101 includes a preparation tank 1011, an exhaust fan 1012 and an air pipe 1013. The exhaust fan 1012 is connected to the top of the preparation tank 1011, and the air pipe 1013 is connected to the top of the exhaust fan 1012. By setting the preparation tank 1011, the polyferric sulfate raw material and hydrogen peroxide can be stored and prepared. The exhaust fan 1012 can collect the oxygen generated during the preparation process, and the air pipe 1013 can transport the collected oxygen to the storage component 102.

[0050] like Figure 4 As shown, the storage component 102 includes an air inlet support plate 1021, an air outlet support plate 1022 and a reaction tank 1023. The air inlet support plate 1021 is bolted to the right side of the preparation tank 1011, and the air outlet support plate 1022 is bolted to the side of the rear side of the preparation tank 1011 close to the air inlet support plate 1021. The reaction tank 1023 is connected to the bottom of the air inlet support plate 1021, and the front side of the reaction tank 1023 is connected to the air outlet support plate 1022. By setting up the storage component 102, the air inlet support plate 1021 can support and limit the reaction tank 1023, and can transport oxygen into the reaction tank 1023. The air outlet support plate 1022 can further support and limit the air outlet support plate 1022, and can transport the hydrogen peroxide that has completed the reaction in the reaction tank 1023 to the preparation tank 1011. The reaction tank 1023 can temporarily store and prepare oxygen and the reaction materials transported by the calcium adding component 104.

[0051] like Figure 5As shown, the cathode assembly 103 includes a connecting ring 1031, an electrolyzer 1032 and positive and negative electrode plates 1033. The connecting ring 1031 is bolted to the surface of the reaction tank 1023, the electrolyzer 1032 is bolted to the rear side of the connecting ring 1031, the positive and negative electrode plates 1033 are bolted to the inner wall of the connecting ring 1031, and the rear sides of the positive and negative electrode plates 1033 are bolted to the electrolyzer 1032. By setting the cathode assembly 103, the connecting ring 1031 can support and limit the electrolyzer 1032 and the positive and negative electrode plates 1033. After being energized, the electrolyzer 1032 can convert electrical energy into ions and then transport the ions to the positive and negative electrode plates 1033. The positive and negative electrode plates 1033 can transmit ions into the reaction tank 1023 and catalyze the materials and oxygen in the reaction tank 1023.

[0052] like Figure 5 As shown, the calcium adding component 104 includes a delivery pump 1041, a storage tank 1042 and a feed port 1043. The delivery pump 1041 is connected to the right side of the connecting ring 1031, and the left side of the delivery pump 1041 is connected to the reaction tank 1023. The storage tank 1042 is connected to the surface of the delivery pump 1041, and the feed port 1043 is opened on the right side of the storage tank 1042. By setting the calcium adding component 104, the delivery pump 1041 can transport the material in the storage tank 1042, and the storage tank 1042 can temporarily store the oxygen cathode reduction method materials. The feed port 1043 can facilitate the replenishment of the preparation materials in the storage tank 1042. The oxygen cathode reduction method is to place a strong alkaline electrolyte into the reaction tank 1023, so that oxygen is reduced to perhydroxyl anions at the cathode, and then converted into hydrogen peroxide in the reaction tank 1023. The process is to generate calcium peroxide with the help of calcium salt precipitation, filter and decompose, and use carbon dioxide to decompose to produce hydrogen peroxide.

[0053] Brief description of the usage process: First, the recovery mechanism 1 is powered on and started, and the raw materials for preparing polyferric sulfate and hydrogen peroxide are placed in the preparation tank 1011 for preparation. After the polyferric sulfate reacts with the hydrogen peroxide, the oxygen will be pumped to the gas pipe 1013 by the exhaust fan 1012, and then enter the reaction tank 1023. The materials required for the oxygen cathode reduction method are placed in the storage tank 1042. The delivery pump 1041 will transport the materials for the oxygen cathode reduction method to the reaction tank 1023 to react with the oxygen, and the electrolyzer 1032 will drive the positive and negative plates 1033, allowing the positive and negative plates 1033 to perform the oxygen cathode reduction method on the oxygen, thereby preparing hydrogen peroxide from the oxygen and the materials for the oxygen cathode reduction method. After preparation, the hydrogen peroxide will enter the preparation tank 1011 for recycling.

[0054] Example 2:

[0055] refer to Figure 6-10A modification device for preparing polyferric sulfate by a combined oxidation process includes a modification mechanism 2, which is bolted to the front side of a recovery mechanism 1. The modification mechanism 2 includes a conveying component 201, a switching component 202, an acid adding component 203, and a self-locking component 204. The conveying component 201 is connected to the front side of the preparation component 101, the switching component 202 is bolted to the bottom of the conveying component 201, the acid adding component 203 is connected to the front and rear sides of the top of the switching component 202, and the self-locking component 204 is connected to the acid adding component 203. The bottom of the self-locking component 204 is clamped with the top of the conveying component 201. By setting the modification mechanism 2, the conveying component 201 can convey the modified acid liquid in the acid adding component 203 to the recovery mechanism 1 for polyferric sulfate modification preparation. The switching component 202 can switch the modified acid liquid of different concentrations in the acid adding component 203. The acid adding component 203 can convey the modified acid liquid to the recovery mechanism 1. The self-locking component 204 can limit the acid adding component 203 after the acid adding component 203 completes the switching.

[0056] like Figure 7 As shown, the conveying component 201 includes a limiting frame 2011, a clamping groove 2012 and a liquid pump 2013. The limiting frame 2011 is bolted to the front side of the preparation tank 1011, the clamping groove 2012 is opened on the front side of the limiting frame 2011, and the clamping groove 2012 is opened at the bottom of the inner wall of the limiting frame 2011. The liquid pump 2013 is connected to the bottom of the limiting frame 2011, and the bottom of the clamping groove 2012 is connected to the liquid pump 2013. By setting the conveying component 201, the limiting frame 2011 can support and limit the switching component 202, the clamping groove 2012 can be self-lockingly clamped with the self-locking component 204, and the liquid pump 2013 can pump the modified acid solution into the recovery mechanism 1 after power is turned on.

[0057] like Figure 8 As shown, the switching component 202 includes a servo motor 2021, a rotating rod 2022 and a connecting plate 2023. The servo motor 2021 is bolted to the front side of the bottom of the limit frame 2011, and the rotating rod 2022 is bolted to the output end at the top of the servo motor 2021. The surface of the rotating rod 2022 is rotatably connected to the limit frame 2011, and the connecting plate 2023 is bolted to the top of the rotating rod 2022. By setting the switching component 202, the servo motor 2021 can convert electrical energy into rotational mechanical energy after being powered on, and then transmit the mechanical energy to the rotating rod 2022. The rotating rod 2022 will rotate the connecting plate 2023, thereby changing the position of the acid adding component 203 and switching the acid adding component 203.

[0058] like Figure 9As shown, the acid adding component 203 includes a liquid storage tank 2031, a liquid inlet 2032 and a limiting sleeve 2033. The liquid storage tank 2031 is connected to the front and rear sides of the top of the connecting plate 2023. The liquid inlet 2032 is opened at the top of the liquid storage tank 2031. The limiting sleeve 2033 is bolted to the bottom of the liquid storage tank 2031. By setting the acid adding component 203, the liquid storage tank 2031 can store up to two modified acid solutions of different concentrations. The liquid inlet 2032 can facilitate the transportation of the modified acid solution into the liquid storage tank 2031. The limiting sleeve 2033 can limit the self-locking component 204.

[0059] like Figure 10 As shown, the self-locking component 204 includes a connecting tube 2041, a clamping sleeve 2042 and a reset spring 2043. The top of the connecting tube 2041 is connected to the liquid storage tank 2031, the clamping sleeve 2042 is connected to the surface of the connecting tube 2041, the top of the clamping sleeve 2042 is sleeved on the surface of the limiting sleeve 2033, the reset spring 2043 is bolted to the side of the inner wall of the clamping sleeve 2042 away from the connecting tube 2041, and the top of the reset spring 2043 is bolted to the limiting sleeve 2033. By setting the self-locking component 204, the connecting tube 2041 can transport the modified acid liquid in the liquid storage tank 2031 to the liquid pump 2013, the clamping sleeve 2042 can be clamped with the clamping groove 2012, and the reset spring 2043 can reset the displacement of the clamping sleeve 2042, so that the clamping sleeve 2042 can be self-lockingly connected to the clamping groove 2012.

[0060] Brief description of the usage process: First, power on the modification mechanism 2 and start it, and inject the required high-concentration modification acid solution and low-concentration modification acid solution into the two liquid storage tanks 2031 respectively. The liquid pump 2013 will pump the modification acid solution in the liquid storage tank 2031 to the recovery mechanism 1 for reaction. When the liquid storage tank 2031 needs to be replaced, the servo motor 2021 will rotate the connecting plate 2023, and the connecting plate 2023 will drive the liquid storage tank 2031 to rotate, move the current liquid storage tank 2031, and then transfer another liquid storage tank 2031 to the clamping groove 2012 until the clamping sleeve 2042 is connected to the clamping groove 2012, so that the replacement of the modification acid storage tank 2031 with different concentrations can be changed.

[0061] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A modification device for preparing polyferric sulfate by a combined oxidation process, comprising a recovery mechanism (1) and a modification mechanism (2), characterized in that: The modification mechanism (2) is bolted to the front side of the recovery mechanism (1). The recovery mechanism (1) includes a preparation component (101), a storage component (102), a cathode component (103) and a calcium adding component (104). The storage component (102) is connected to the rear side of the preparation component (101). The cathode component (103) is bolted to the surface of the storage component (102). The calcium adding component (104) is connected to the right side of the cathode component (103). The modification mechanism (2) includes a conveying component (201 ), a switching component (202), an acid adding component (203) and a self-locking component (204), wherein the conveying component (201) is connected to the front side of the preparation component (101), the switching component (202) is bolted to the bottom of the conveying component (201), the acid adding component (203) is connected to the front side and the rear side of the top of the switching component (202), the self-locking component (204) is connected to the bottom of the acid adding component (203), and the bottom of the self-locking component (204) is clamped with the top of the conveying component (201); The preparation assembly (101) comprises a preparation tank (1011), an exhaust fan (1012) and an air supply pipe (1013), wherein the exhaust fan (1012) is connected to the top of the preparation tank (1011), and the air supply pipe (1013) is connected to the top of the exhaust fan (1012); The storage assembly (102) comprises an air inlet support plate (1021), an air outlet support plate (1022) and a reaction tank (1023), wherein the air inlet support plate (1021) is bolted to the right side of the preparation tank (1011), the air outlet support plate (1022) is bolted to the rear side of the preparation tank (1011) close to the air inlet support plate (1021), the reaction tank (1023) is connected to the bottom of the air inlet support plate (1021), and the front side of the reaction tank (1023) is connected to the air outlet support plate (1022); The cathode assembly (103) comprises a connecting ring (1031), an electrolyzer (1032) and positive and negative electrode plates (1033); the connecting ring (1031) is bolted to the surface of the reaction tank (1023); the electrolyzer (1032) is bolted to the rear side of the connecting ring (1031); the positive and negative electrode plates (1033) are bolted to the inner wall of the connecting ring (1031); and the rear sides of the positive and negative electrode plates (1033) are bolted to the electrolyzer (1032); The calcium adding component (104) comprises a delivery pump (1041), a storage tank (1042) and a feed inlet (1043); the delivery pump (1041) is connected to the right side of the connecting ring (1031); the left side of the delivery pump (1041) is connected to the reaction tank (1023); the storage tank (1042) is connected to the surface of the delivery pump (1041); and the feed inlet (1043) is opened on the right side of the storage tank (1042); The conveying assembly (201) comprises a limiting frame (2011), a clamping groove (2012) and a liquid pump (2013); the limiting frame (2011) is bolted to the front side of the preparation tank (1011); the clamping groove (2012) is provided on the front side of the limiting frame (2011); the clamping groove (2012) is provided at the bottom of the inner wall of the limiting frame (2011); the liquid pump (2013) is connected to the bottom of the limiting frame (2011); and the bottom of the clamping groove (2012) is connected to the liquid pump (2013); The switching assembly (202) comprises a servo motor (2021), a rotating rod (2022) and a connecting plate (2023); the servo motor (2021) is bolted to the front side of the bottom of the limiting frame (2011); the rotating rod (2022) is bolted to the output end of the top of the servo motor (2021); the surface of the rotating rod (2022) is rotatably connected to the limiting frame (2011); and the connecting plate (2023) is bolted to the top of the rotating rod (2022); The acid addition assembly (203) comprises a liquid storage tank (2031), a liquid inlet (2032) and a limiting sleeve (2033); the liquid storage tank (2031) is connected to the front and rear sides of the top of the connecting plate (2023); the liquid inlet (2032) is opened at the top of the liquid storage tank (2031); and the limiting sleeve (2033) is bolted to the bottom of the liquid storage tank (2031); The self-locking component (204) comprises a connecting tube (2041), a snap-fit sleeve (2042) and a reset spring (2043); the top of the connecting tube (2041) is connected to the liquid storage tank (2031); the snap-fit sleeve (2042) is connected to the surface of the connecting tube (2041); the top of the snap-fit sleeve (2042) is sleeved on the surface of the limiting sleeve (2033); the reset spring (2043) is bolted to the inner wall of the snap-fit sleeve (2042) on a side away from the connecting tube (2041); and the top of the reset spring (2043) is bolted to the limiting sleeve (2033).

2. The method for using the modification device for preparing polyferric sulfate by a combined oxidation process according to claim 1, wherein: The following steps are involved: S1. Preparation of polyferric sulfate and recycling of hydrogen peroxide: First, the recovery mechanism (1) is powered on and started, and the raw materials for preparing polyferric sulfate and hydrogen peroxide are placed in the preparation tank (1011) for preparation. After the polyferric sulfate reacts with the hydrogen peroxide, the oxygen is pumped to the air pipe (1013) by the exhaust fan (1012), and then enters the reaction tank (1023). The materials required for the oxygen cathode reduction method are placed in the storage tank (1042). The delivery pump (1041) will transport the materials for the oxygen cathode reduction method to the reaction tank (1023) to react with the oxygen, and the electrolyzer (1032) drives the positive and negative plates (1033), allowing the positive and negative plates (1033) to perform the oxygen cathode reduction method on the oxygen, thereby preparing hydrogen peroxide from the oxygen and the materials for the oxygen cathode reduction method. After the preparation, the hydrogen peroxide will enter the preparation tank (1011) for recycling; S2. Adjusting the modification operation of polyferric sulfate: First, the modification mechanism (2) is powered on and started, and the required high-concentration modified acid solution and low-concentration modified acid solution are respectively injected into the two liquid storage tanks (2031). The liquid pump (2013) will pump the modified acid solution in the liquid storage tank (2031) to the recovery mechanism (1) for reaction. When the liquid storage tank (2031) needs to be replaced, the servo motor (2021) will rotate the connecting plate (2023), and the connecting plate (2023) will drive the liquid storage tank (2031) to rotate, move the current liquid storage tank (2031), and then transfer another liquid storage tank (2031) to the clamping groove (2012) until the clamping sleeve (2042) is connected to the clamping groove (2012), thereby changing the replacement of the modified acid storage tank (2031) with different concentrations.

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