Acid regeneration system, control method thereof and medium

Abstract

The invention discloses an acid regeneration system, a control method thereof and a medium. The acid regeneration system comprises a man-machine operation device, a controller and an acid regeneration unit, and the controller is used for receiving a control instruction sent by the man-machine operation device and sending an execution instruction to the acid regeneration unit according to the control instruction; the execution instruction comprises a steam condensate water amount execution instruction, and the steam condensate water conveying device is used for controlling the water amount of conveyed steam condensate water based on the steam condensate water amount execution instruction; the acid regeneration unit comprises a desilicication unit and a roasting unit; the desiliconization unit is used for desiliconizing the waste acid liquid to obtain purified iron liquid; the desiliconization unit comprises a purified iron liquid buffer tank for storing purified iron liquid and a steam condensate water conveying device for conveying steam condensate water to the purified iron liquid buffer tank, and the steam condensate water is used for diluting the purified iron liquid; and the roasting unit is used for roasting the diluted purified iron liquid to obtain iron oxide powder and regenerated acid. The iron oxide powder obtained by the system is good in quality.

Description

Technical Field

[0001] The present invention relates to the field of metallurgical technology, and particularly to an acid regeneration system, a control method thereof, and a medium. Background Art

[0002] In order to ensure the surface quality of the steel produced, steel enterprises need to provide the strip steel with a clean and active surface. To obtain such a surface, the strip steel is pickled to remove the scale on the surface, and waste acid is generated during the cold rolling pickling process.

[0003] In the prior art, the waste acid is recycled through an acid regeneration system. The acid regeneration system regenerates the waste acid into regenerated acid through a series of chemical and physical methods, and at the same time produces high-value iron oxide powder.

[0004] However, the iron powder produced by the current acid regeneration system has poor quality and cannot meet the national first-class product standard, so it can only be treated as solid waste, resulting in poor regeneration efficiency. Summary of the Invention

[0005] In view of the above problems, the present invention is proposed to provide an acid regeneration system, a control method thereof, and a medium to solve the above problems. The remote control of the acid regeneration unit is realized through the added human-machine operation device, which improves the timeliness and effectiveness of control. At the same time, steam condensate is transported to the purified iron liquid buffer tank storing the purified iron liquid to dilute the purified iron liquid, adjust the concentration of the purified iron liquid, improve the baking effect of the roasting unit, and make the obtained iron oxide powder have better quality and meet the national first-class product standard.

[0006] In a first aspect, the present invention provides an acid regeneration system, which includes a human-machine operation device, a controller, and an acid regeneration unit. The human-machine operation device is connected to the controller, and the controller is communicatively connected to the acid regeneration unit;

[0007] The human-machine operation device is used to obtain a control instruction input by a user and send the control instruction to the controller;

[0008] The controller is used to receive the control instruction sent by the human-machine operation device and send an execution instruction to the acid regeneration unit according to the control instruction;

[0009] The acid regeneration unit is used to regenerate the waste acid liquid based on the execution instruction to obtain regenerated acid and iron oxide powder;

[0010] Among them, the acid regeneration unit includes a desiliconization unit and a roasting unit; the desiliconization unit is used for desiliconizing the waste acid solution to obtain purified iron liquid; the desiliconization unit includes a purified iron liquid buffer tank for storing the purified iron liquid and a steam condensate conveying device for conveying steam condensate to the purified iron liquid buffer tank, and the steam condensate is used for diluting the purified iron liquid in the purified iron liquid buffer tank; the roasting unit is used for roasting the diluted purified iron liquid to obtain the iron oxide powder and the regenerated acid;

[0011] The execution instruction includes a steam condensate amount execution instruction, and the steam condensate conveying device is used for controlling the amount of the steam condensate conveyed to the purified iron liquid buffer tank based on the steam condensate amount execution instruction.

[0012] Optionally, the desiliconization unit further includes a purified iron liquid storage tank and a purified iron liquid pump; the purified iron liquid pump is respectively connected to the purified iron liquid buffer tank and the purified iron liquid storage tank, and is used for pumping the purified iron liquid in the purified iron liquid buffer tank to the purified iron liquid storage tank;

[0013] The roasting unit includes a roasting furnace, a Venturi scrubber, a Venturi separator and an absorption tower connected in sequence, and a concentrated iron liquid pump respectively connected to the Venturi separator and the roasting furnace;

[0014] The purified iron liquid storage tank is used for providing the purified iron liquid for the Venturi separator;

[0015] The Venturi separator is used for performing gas-liquid separation treatment on the purified iron liquid, and conveying the liquid obtained after gas-liquid separation to the Venturi scrubber, and conveying the gas obtained after gas-liquid separation to the absorption tower;

[0016] The roasting furnace is used for conveying the furnace gas generated to the Venturi scrubber;

[0017] The Venturi scrubber is used for washing the liquid with the furnace gas to obtain a concentrated liquid, and conveying the concentrated liquid back to the Venturi separator for gas-liquid separation to obtain concentrated iron liquid;

[0018] The concentrated iron liquid pump is used for spraying the concentrated iron liquid in the Venturi separator into the roasting furnace in a mist state at a preset pressure, and the preset pressure is greater than the pressure threshold;

[0019] The roasting furnace is used for reacting the concentrated iron liquid with oxygen and water to obtain a reaction product, iron oxide;

[0020] The absorption tower is used for dissolving hydrogen chloride in the gas with sprayed water to obtain a regenerated acid solution; a filler for increasing the dissolution area of the sprayed water and the hydrogen chloride is arranged in the absorption tower.

[0021] Optionally, the roasting unit further includes a first scrubber and a second scrubber connected to each other;

[0022] The first scrubber is used to supply the injection water to the absorption tower;

[0023] The absorption tower is further used to transport the undissolved gas to the first scrubber;

[0024] The first scrubber is used to perform a first scrubbing on the undissolved gas to obtain the gas after the first scrubbing, and transport the gas after the first scrubbing to the second scrubber;

[0025] The second scrubber is used to perform a second scrubbing on the gas after the first scrubbing to obtain the gas after the second scrubbing, and discharge the gas after the second scrubbing into the atmosphere.

[0026] Optionally, the desilication unit further includes a heater, a neutralization tank, an uncleaned molten iron buffer tank, a cooler, an acid-base adjustment tank, a flocculator and a sedimentation tank connected in sequence. Scrap iron chips are installed in the neutralization tank;

[0027] The heater is used to heat the waste acid solution and transport the heated waste acid solution to the neutralization tank;

[0028] The neutralization tank is used to react the heated waste acid solution with the scrap iron chips to obtain uncleaned molten iron, and transport the uncleaned molten iron to the uncleaned molten iron buffer tank;

[0029] The uncleaned molten iron buffer tank is used to supply the uncleaned molten iron to the acid-base adjustment tank;

[0030] The cooler is used to cool the uncleaned molten iron;

[0031] The acid-base adjustment tank is used to react the uncleaned molten iron with the ammonia solution inside the acid-base adjustment tank to obtain a ferric hydroxide solution, and transport the ferric hydroxide solution to the flocculator;

[0032] The flocculator is used to react the ferric hydroxide solution with the flocculant inside the flocculator to obtain ferric hydroxide flocs, and transport the ferric hydroxide flocs to the sedimentation tank;

[0033] The sedimentation tank is used to perform precipitation separation treatment on the ferric hydroxide flocs to obtain the purified molten iron, and transport the purified molten iron to the purified molten iron buffer tank.

[0034] Optionally, the desilication unit further includes a filter press, and the filter press is respectively connected to the sedimentation tank and the purified molten iron buffer tank;

[0035] The sedimentation tank is also used to transport the silicon-containing slurry generated during the precipitation separation of the iron hydroxide flocs to the filter press;

[0036] The filter press is used to dehydrate the silicon-containing slurry to obtain filtrate and transport the filtrate to the purified iron liquid buffer tank.

[0037] Optionally, the acid-base adjustment tank includes a first acid-base adjustment tank and a second acid-base adjustment tank connected to each other. The first acid-base adjustment tank is connected to the cooler, and the second acid-base adjustment tank is connected to the flocculator;

[0038] The first acid-base adjustment tank is used to react the unpurified iron liquid with the ammonia solution inside the first acid-base adjustment tank to obtain unpurified iron liquid with a first acid-base value, and transport the unpurified iron liquid with the first acid-base value to the second acid-base adjustment tank;

[0039] The second acid-base adjustment tank is used to react the unpurified iron liquid with the first acid-base value with the ammonia solution inside the second acid-base adjustment tank to obtain iron hydroxide solution with a second acid-base value;

[0040] Wherein, the first acid-base value is less than the second acid-base value.

[0041] Optionally, the desiliconization unit further includes an unpurified iron liquid filter arranged between the neutralization tank and the unpurified iron liquid buffer tank, for filtering the unpurified iron liquid.

[0042] Optionally, the controller is further used for:

[0043] Obtain the production data of the acid regeneration unit, where the production data includes at least one of flow data, pressure data, frequency data, temperature data, liquid level data, and opening data;

[0044] Draw a curve of the production data changing with time and display the curve on a preset display interface;

[0045] Determine alarm information according to the production data and a preset alarm value, and display the alarm information on a preset display interface.

[0046] In a second aspect, the present invention provides a control method for an acid regeneration system, the method including:

[0047] Obtain the production data of the acid regeneration unit, where the production data includes at least one of flow data, pressure data, frequency data, temperature data, liquid level data, and opening data;

[0048] Plot the curve of the production data changing with time, and display the curve on a preset display interface;

[0049] Determine alarm information according to the production data and a preset alarm value, and display the alarm information on a preset display interface.

[0050] In a third aspect, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the method described in the second aspect.

[0051] The technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0052] An acid regeneration system, its control method and medium provided in an embodiment of the present invention. The system includes a human-machine operation device, a controller and an acid regeneration unit. The human-machine operation device is used to obtain a control instruction input by a user and send the control instruction to the controller. The controller is used to receive the control instruction sent by the human-machine operation device and send an execution instruction to the acid regeneration unit according to the control instruction, and remotely control the acid regeneration unit through the human-machine operation device and the controller. The acid regeneration unit is used to regenerate waste acid liquid based on the execution instruction to obtain regenerated acid and iron oxide powder. Among them, the acid regeneration unit includes a desiliconization unit and a roasting unit. The desiliconization unit is used to perform desiliconization treatment on waste acid liquid to obtain purified iron liquid. The desiliconization unit includes a purified iron liquid buffer tank for storing purified iron liquid and a steam condensate conveying device for conveying steam condensate to the purified iron liquid buffer tank. The purified iron liquid is diluted by the steam condensate to change the concentration of the purified iron liquid. After the purified iron liquid with the changed concentration is conveyed to the roasting unit for roasting treatment, better-quality iron oxide powder can be obtained. The roasting unit is used to perform roasting treatment on the purified iron liquid to obtain iron oxide powder and regenerated acid. The execution instruction includes a steam condensate amount execution instruction, and the steam condensate conveying device is used to control the amount of steam condensate conveyed to the purified iron liquid buffer tank based on the steam condensate amount execution instruction, and can also realize the control of the condensate amount.

[0053] The above description is only an overview of the technical solutions of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are specifically given below. Description of the Drawings

[0054] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0055] Figure 1 is a schematic structural diagram of an acid regeneration system provided by an embodiment of the present application;

[0056] Figure 2 is a schematic structural diagram of a desiliconization unit provided by an embodiment of the present application;

[0057] Figure 3 is a schematic structural diagram of a roasting unit provided by an embodiment of the present application;

[0058] Figure 4 is a schematic diagram of a curve interface provided by an embodiment of the present application;

[0059] Figure 5 is a flowchart of a control method for an acid regeneration system provided by an embodiment of the present invention. Detailed implementation manners

[0060] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. Without conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0061] Figure 1 is a schematic structural diagram of an acid regeneration system provided by an embodiment of the present invention. As Figure 1 shown, the system includes a human-machine operation device 1, a controller 2, and an acid regeneration unit 3. The human-machine operation device 1 and the controller 2 are communicatively connected through Transmission Control Protocol / Internet Protocol (TCP / IP), and the controller 2 is communicatively connected to the acid regeneration unit 3. The human-machine operation device 1 is configured to obtain a control instruction input by a user and send the control instruction to the controller 2;

[0062] The controller 2 is configured to receive the control instruction sent by the human-machine operation device 1 and send an execution instruction to the acid regeneration unit 3 according to the control instruction;

[0063] The acid regeneration unit 3 is configured to regenerate waste acid liquid based on the execution instruction to obtain regenerated acid and iron oxide powder;

[0064] Among them, the acid regeneration unit 3 includes a desiliconization unit 31 and a roasting unit 35. The desiliconization unit 31 is configured to perform desiliconization treatment on waste acid liquid to obtain purified iron liquid. The desiliconization unit 31 includes a purified iron liquid buffer tank for storing purified iron liquid and a steam condensate water delivery device (not shown in the figure) for delivering steam condensate water to the purified iron liquid buffer tank. The roasting unit 35 is configured to perform roasting treatment on the purified iron liquid to obtain iron oxide powder and regenerated acid.

[0065] The execution instruction includes an instruction for the amount of steam condensate. The steam condensate conveying device is used to control the amount of steam condensate conveyed to the purified molten iron buffer tank based on the instruction for the amount of steam condensate.

[0066] In the embodiment of the present application, the waste acid solution generated by the pickling process is stored in the waste acid storage tank in the tank area. The waste acid solution in the waste acid storage tank is conveyed to the desiliconization unit 31 by the waste acid feed pump for desiliconization treatment, extracting the suspended and colloidal silicon in the waste acid solution, and then precipitating and decomposing it. After the waste liquid is desiliconized, it becomes purified molten iron. The purified molten iron is stored in the purified molten iron buffer tank, and steam condensate is sprayed into the purified molten iron buffer tank. The purified molten iron is diluted by the steam condensate to change the concentration of the purified molten iron. The purified molten iron with the changed concentration is conveyed to the roasting unit 35 for roasting treatment. The hydrogen chloride in the purified molten iron reacts with oxygen and water to generate iron oxide, obtaining iron oxide powder. The remaining hydrogen chloride gas dissolves in water to form regenerated acid, and the obtained iron oxide powder has very good quality, meeting the national first-class product standard. Among them, the amount of steam condensate can be controlled to achieve the control of the concentration of the purified molten iron.

[0067] Among them, the human-machine operation device includes a mouse, a keyboard, a touch screen, etc. A human-machine operation interface is set on the touch screen, and the user can input control instructions on the human-machine operation interface.

[0068] Figure 2 It is a schematic structural diagram of a desiliconization unit provided by the embodiment of the present application. As Figure 2 shown, the desiliconization unit 31 further includes a heater 310, a neutralization tank 311, an unpurified molten iron buffer tank 312, a cooler 313, an acid-base adjustment tank 314, a flocculator 315, and a sedimentation tank 316 connected in sequence;

[0069] The heater 310 is used to heat the waste acid solution and convey the heated waste acid solution to the neutralization tank 311;

[0070] The neutralization tank 311 is used to react the heated waste acid solution with the loaded iron filings to obtain unpurified molten iron and convey the unpurified molten iron to the unpurified molten iron buffer tank 312;

[0071] The unpurified molten iron buffer tank 312 is used to provide unpurified molten iron for the acid-base adjustment tank 314;

[0072] The cooler 313 is used to cool the unpurified molten iron;

[0073] The acid-base adjustment tank 314 is used to react the unpurified molten iron with the ammonia solution inside the acid-base adjustment tank to obtain an iron hydroxide solution and convey the iron hydroxide solution to the flocculator 315;

[0074] The flocculator 315 is used to react the iron hydroxide solution with the flocculant inside the flocculator to obtain iron hydroxide flocs, and convey the iron hydroxide flocs to the sedimentation tank 316;

[0075] The sedimentation tank 316 is used to perform precipitation separation treatment on the iron hydroxide flocs to obtain purified iron liquid, and convey the purified iron liquid to the purified iron liquid buffer tank.

[0076] As Figure 2 shown, the waste acid liquor is pumped into the heater 310 by the waste acid feed pump 323 for heating. The heated waste acid liquor is conveyed to the neutralization tank 311 filled with shredded iron (end-sheared iron chips), and the shredded iron chips can increase the acid reaction area. The hot waste pickle liquor (WPL) flows circuitously in the neutralization tank 311 and contacts the shredded iron chips. HCl (hydrogen chloride) in the WPL reacts with iron to generate H2 (hydrogen) and FeCl2 (ferrous chloride). The WPL needs to stay in the neutralization tank 311 for about 10 hours so as to fully remove the free HCl and make the power of hydrogen (PH) of the solution reach 1.0. During this process, the acid liquor in the neutralization tank 311 flows slowly, causing more precipitation of larger suspended particles of silicon. The neutralized WPL is called unprocessed iron liquid (UIL), and the UIL continuously overflows into the unprocessed iron liquid buffer tank 312 (UIL tank) for the next process. The mixed gas of hydrogen, HCl vapor and water vapor in the neutralization tank 311 is continuously discharged into the neutralization tank scrubber 321 by a glass fiber reinforced plastics (FRP) fan, and is discharged after removing the HCl vapor.

[0077] Among them, the neutralization tank 311 is a large multi-chamber CS (CARBON STEEL) container lined with rubber and acid-resistant bricks, and the top is sealed with a movable polypropylene lid. The heater 310 can be a graphite preheater. Steam sequentially passes through the flow sensor 4 and the valve 5 and enters the graphite preheater, and the graphite preheater is directly heated to 85 - 90 °C by the steam.

[0078] In the embodiment of the present application, the neutralization tank scrubber 321 is connected to the neutralization scrubber circulation pump 324, and the scrubber circulation pump 324 is used to provide circulating water for the neutralization tank scrubber 321. A pressure sensor 6 is also arranged on the liquid pipeline between the neutralization tank scrubber 321 and the neutralization scrubber circulation pump 324, for detecting the pressure of the circulating water. A flow sensor 4, a pressure sensor 6 and a valve 5 are also arranged between the acid feed pump 323 and the heater 310. The flow sensor 4 and the pressure sensor 6 are respectively used to detect the flow rate and pressure of the waste acid liquid, and the valve 5 is used to control whether the waste acid liquid enters the heater 310.

[0079] Next, the UIL in the UIL tank 312 is pumped into the cooler 313 by the UIL buffer pump 328. The cooler 313 cools the UIL with cooling water. After the UIL is cooled to about 38 - 40 °C, it is pumped into the acid-base adjustment tank 314. A quantitative ammonia solution with a concentration of 25% is added to the acid-base adjustment tank 314 to raise the pH in the acid-base adjustment tank 314 to 3.0. A certain amount of instrument compressed air is introduced into the liquid in the acid-base adjustment tank 314 to oxidize a small part of divalent iron to trivalent iron through air oxidation. The trivalent iron is deposited as ferric hydroxide. Some ferrous hydroxide deposits are also formed due to local reactions in the acid-base adjustment tank 314. The liquid with deposits flows into the flocculator 315 for the next treatment. Among them, the ammonia solution is stored in a separate stainless steel tank 320 in the factory area. A flow sensor 4 is arranged at the inlet end of the cooler 313 for detecting the flow rate of the cooling water.

[0080] Next, in the flocculator 315, the liquid with colloidal ferric hydroxide can well separate out the colloidal deposits under the action of the diluted special flocculant. The colloidal deposits become denser and form large flocs that quickly fall to the bottom of the sedimentation tank 316 with a larger surface area. Among them, the flocculant is stored in the flocculant storage tank 322 and is pumped into the flocculator 315 by the flocculant pump 326.

[0081] Among them, the sedimentation tank 316 is in an inverted conical shape, shallower and has a larger surface area, and is equipped with a slowly rotating agitator to drive the sediment to settle to the bottom of the tank. The liquid generated by the agitation is the purified iron liquid.

[0082] Optionally, the desiliconization unit 31 further includes a purified iron liquid storage tank (not shown in the figure) and a purified iron liquid pump 317; the purified iron liquid pump 317 is respectively connected to the purified iron liquid buffer tank 318 and the purified iron liquid storage tank, and is used to pump the purified iron liquid in the purified iron liquid buffer tank to the purified iron liquid storage tank.

[0083] In the embodiment of the present application, the average residence time of the liquid in the sedimentation tank 316 is 3 to 3.5 hours. During this period, the flocs precipitate to separate the pure liquid, which overflows from a central chute at the top into the Purified Iron Liquor (PIL) buffer tank 318. This pure liquid is the purified iron liquor (PIL). Then, the purified iron liquor in the purified iron liquor buffer tank is pumped to the purified iron liquor storage tank by the purified iron liquor pump 317 for use in roasting.

[0084] Among them, the purified iron liquor storage tank and the waste acid storage tank are arranged together in the tank area.

[0085] Optionally, the desiliconization unit 31 further includes a filter press 319, and the filter press 319 is respectively connected to the sedimentation tank 316 and the purified iron liquor buffer tank;

[0086] The sedimentation tank 316 is also used to transport the silicon-containing slurry generated during the precipitation separation of the iron hydroxide flocs to the filter press;

[0087] The filter press is used to dehydrate the silicon-containing slurry to obtain filtrate and transport the filtrate to the purified iron liquor buffer tank.

[0088] In the embodiment of the present application, the silicon-containing slurry flowing out from the bottom of the sedimentation tank 316 is pumped into the plate-and-frame filter press 319 by the slurry pump 325 for dehydration and filtration treatment, and the filtered liquid is sent back to the PIL (purified iron liquor) buffer tank. Among them, a flow sensor 4 and a pressure sensor 6 are arranged on the pipeline between the filter press and the sedimentation tank 316 to detect the pressure and flow rate of the slurry.

[0089] Optionally, the acid-base adjustment tank 314 includes a first acid-base adjustment tank and a second acid-base adjustment tank connected to each other. The first acid-base adjustment tank is connected to the cooler 313, and the second acid-base adjustment tank is connected to the flocculator 315;

[0090] The first acid-base adjustment tank is used to react the unpurified iron liquor with the ammonia solution inside the first acid-base adjustment tank to obtain the unpurified iron liquor with the first acid-base value, and transport the unpurified iron liquor with the first acid-base value to the second acid-base adjustment tank;

[0091] The second acid-base adjustment tank is used to react the unpurified iron liquor with the first acid-base value with the ammonia solution inside the second acid-base adjustment tank to obtain the iron hydroxide solution with the second acid-base value;

[0092] Among them, the first acid-base value is less than the second acid-base value.

[0093] In the embodiment of the present application, the cooled unpurified molten iron is first pumped into the first acid-base (1#PH) adjustment tank, and a quantified ammonia solution with a concentration of 25% is added to raise the PH in the 1#PH adjustment tank to 3.0. Meanwhile, a certain amount of instrument compressed air is introduced into the liquid in the 1#PH adjustment tank to oxidize a small part of divalent iron to trivalent iron. Part of the UIL in the 1#PH adjustment tank overflows into the second acid-base (2#PH) adjustment tank, and the PH of the unpurified molten iron is further adjusted in the 2#PH adjustment tank. Similarly, a certain amount of ammonia solution with a concentration of 25% is added to the 2#PH adjustment tank to further raise the PH of the unpurified molten iron to about 4.5. PH detectors are installed in the 1#PH and 2#PH adjustment tanks. The PH value of the unpurified molten iron is detected by the PH detectors, and the flow rate of the ammonia metering pump is controlled by the controller 2 according to the PH value to adjust the flow rate of the ammonia solution, thereby automatically adjusting the PH value of the unpurified molten iron. The ammonia dosing pump is used to pump the ammonia solution into the PH adjustment tank. In the 2#PH adjustment tank, trivalent iron is deposited as iron hydroxide, and ferrous hydroxide is also deposited. The liquid with the deposits flows into the flocculator 315 for further treatment.

[0094] Among them, the ammonia metering pump is a diaphragm pump.

[0095] Optionally, the desiliconization unit 31 further includes an unpurified molten iron filter 327 arranged between the neutralization tank 311 and the unpurified molten iron buffer tank 312 for filtering the unpurified molten iron.

[0096] In the embodiment of the present application, the filtered unpurified molten iron is cleaner, which is beneficial to the treatment effect of subsequent processes.

[0097] Figure 3 It is a schematic structural diagram of a roasting unit provided by an embodiment of the present application. As Figure 3 shown, the roasting unit 35 includes a roasting furnace 351, a Venturi scrubber 352, a Venturi separator 353, and an absorption tower 355 connected in sequence, and a concentrated molten iron pump 354 connected to the Venturi separator 353 and the roasting furnace 351 respectively;

[0098] The purified molten iron storage tank is used to provide purified molten iron for the Venturi separator 353;

[0099] The Venturi separator 353 is used to perform gas-liquid separation treatment on the purified molten iron, and convey the liquid obtained after gas-liquid separation to the Venturi scrubber 352, and convey the gas obtained after gas-liquid separation to the absorption tower 355;

[0100] The roasting furnace 351 is used to convey the generated furnace gas to the Venturi scrubber 352;

[0101] The Venturi scrubber 352 is used to wash the furnace gas with a washing liquid to obtain a concentrated liquid, and the concentrated liquid is returned to the Venturi separator 353 for gas-liquid separation to obtain concentrated iron liquid;

[0102] The concentrated iron liquid pump 354 is used to spray the concentrated iron liquid in the Venturi separator 353 into the roasting furnace 351 in a mist state at a preset pressure, and the preset pressure is greater than the pressure threshold;

[0103] The roasting furnace 351 is used to react the concentrated iron liquid with oxygen and water to obtain the reaction product iron oxide;

[0104] The absorption tower 355 is used to dissolve hydrogen chloride in the gas with sprayed water to obtain a regenerated acid solution; a filler for increasing the dissolution area of the sprayed water and the hydrogen chloride is arranged in the absorption tower 355.

[0105] In the embodiment of the present application, the roasting unit 35 mainly processes the pure iron liquid (PIL) generated when the desiliconization unit 31 (pre-desiliconization plant and desiliconization plant) purifies the waste acid liquid (WPL). However, when the waste acid liquid (WPL) does not need to be processed into pure iron liquid, the roasting unit 35 can also directly process these waste acid liquids (WPL).

[0106] Specifically, before the roasting treatment, the roasting furnace 351 is first heated dry until the temperature of the combustion zone of the roasting furnace 351 reaches 450 °C. Then enter the water operation mode, spray water into the roasting furnace 351, and continue heating in the water operation mode until the temperature of the combustion zone reaches 700 °C and the metal shell of the roasting furnace 351 reaches 220 °C (the temperature of the metal shell is measured about 1 meter from the burner tip) and then enter the acid operation mode. In the acid operation mode, the PIL or WPL to be processed is pumped from the tank area to the Venturi separator 353 for steam-water separation. The Venturi circulation pump 359 continuously pumps the liquid from the Venturi separator 353 to the Venturi scrubber 352 to meet the furnace gas from the roasting furnace 351 and thus remove particulate matter. During the mixing of the furnace gas and the liquid from the Venturi separator 353, a large amount of water vapor is generated, thereby concentrating the liquid to obtain a concentrated liquid. The mixture of the concentrated liquid and the gas returns tangentially to the Venturi separator 353, and the concentrated liquid generated in the Venturi separator 353 is called concentrated iron liquid (CIL). Among them, during the spraying water operation, the Venturi circulation pump 359 maintains a full-circulation working state to continuously provide circulating water for the Venturi scrubber 352.

[0107] The gas containing HCl is discharged from the Venturi separator 353 and enters the absorption tower 355. The absorption tower 355 uses injected water to dissolve hydrogen chloride in the gas, obtaining a regenerated acid (RA) solution. The regenerated acid solution collects at the bottom of the absorption tower 355 and is continuously pumped back to the regenerated acid tank in the tank farm by the absorption tower pump 360. When needed, it is pumped back to the pickling line, which is used for pickling steel plates. Among them, the concentration of HCl in the absorption tower 355 (the target concentration is 195 g / l) is controlled by the flow rate of the water sprayed into the absorption tower 355. The greater the flow rate of the injected water, the lower the concentration. A flow sensor 4 and a pressure sensor are arranged between the absorption tower 355 and the regenerated acid tank, which are respectively used to detect the flow rate and pressure of the regenerated acid, and a valve 5 is arranged to control whether the regenerated acid is pumped into the regenerated acid tank.

[0108] Next, when the CIL reaches the equilibrium concentration (≈14% concentration of iron, specific gravity is about 1.38 - 1.40), the roasting furnace 351 switches to the acid spraying mode. In the acid spraying mode, the demister 7 that supplies demineralized water to the concentrated iron liquor (CIL) pump 354 will be closed, and the demister 7 that supplies water from the Venturi circulation pump 359 will be opened. Now the CIL pump 354 supplies CIL to the roasting furnace 351, and the CIL pump 354 sprays the CIL in the form of a mist towards the roasting furnace 351 at a preset pressure. In the roasting furnace 351, the CIL contacts the hot combustion products, O2, and H2O and reacts to form iron oxide. The iron oxide falls to the bottom of the roasting furnace 351 to form iron oxide powder, and the furnace gas containing HCl and other combustion products enters the Venturi scrubber 352 through the exhaust pipe and further exchanges heat with the liquid flowing from the Venturi separator 353 as described above in the Venturi scrubber 352.

[0109] In the embodiment of the present application, the iron oxide powder formed after the roasting furnace 351 burns is discharged from the roasting furnace 351 through a crusher and a variable frequency driven rotary valve. The crusher breaks the occasionally formed large and soft iron oxide. The speed of the rotary valve can be changed to control the flow rate of the iron oxide powder conveyed by the hot screw conveyor.

[0110] Among them, a concentrated iron liquor filter 358 is arranged between the concentrated iron liquor pump 354 and the Venturi circulation pump 359 for filtering the concentrated iron liquor. Flow sensors 4 and pressure sensors 6 are arranged on the liquid pipeline between the Venturi scrubber 352 and the Venturi circulation pump 359, which are respectively used to detect the flow rate and pressure of the liquid therein. Pressure sensors 6 and demisters 7 are arranged on the liquid pipeline between the concentrated iron liquor pump 354 and the roasting furnace 351, which are respectively used to detect the pressure of the concentrated iron liquor therein and remove the mist in the concentrated iron liquor. A flow sensor 4 is arranged on the gas pipeline between the absorption tower 355 and the Venturi separator 353 for detecting the flow rate of the gas therein. Exemplarily, the preset pressure is 15.0 kg / cm 2(g).

[0111] Optionally, the roasting unit 35 further includes a first scrubbing tower 356 and a second scrubbing tower 357 connected to each other;

[0112] The Venturi separator 353 is also used to convey the gas generated by gas-liquid separation of the purified molten iron to the absorption tower 355;

[0113] The first scrubbing tower is used to supply spraying water to the absorption tower 355;

[0114] The absorption tower 355 is also used to convey the undissolved gas to the first scrubbing tower;

[0115] The first scrubbing tower is used to perform the first scrubbing on the undissolved gas to obtain the gas after the first scrubbing, and convey the gas after the first scrubbing to the second scrubbing tower 357;

[0116] The second scrubbing tower 357 is used to perform the second scrubbing on the gas after the first scrubbing to obtain the gas after the second scrubbing, and discharge the gas after the second scrubbing into the atmosphere.

[0117] In the embodiment of the present application, the water in the first scrubbing tower 356 is pumped to the top of the packing of the absorption tower at a predetermined amount as the spraying water of the absorption tower 355. The absorption tower 355 also conveys the undissolved gas to the bottom of the first scrubbing tower 356, where it meets the circulating water sprayed towards the top of the packing of the first scrubbing tower. The undissolved HCl meets the circulating water in the upward and downward directions in the first scrubbing tower 356, causing most of the HCl to dissolve in the circulating water. Among them, a pressure sensor is arranged on the gas pipeline between the absorption tower 355 and the first scrubbing tower 356 to detect the pressure of the gas flowing into the first scrubbing tower 356. The packing in the absorption tower 355 is made of polypropylene (PP for short) with special shapes and sizes, so that the adsorption area of the acid is large and the air flow pressure drop is small.

[0118] Next, rinsing water will be replenished into the first scrubbing tower 356 to offset the sprayed water output from it. The gas discharged from the first scrubbing tower 356 enters the second scrubbing tower 357 for further scrubbing, and demineralized water is replenished into the second scrubbing tower 357 as the makeup water of the second scrubbing tower 357. The second scrubbing tower 357 uses demineralized water to scrub the gas, which can ensure that the HCl in the gas discharged from the second scrubbing tower 357 is basically removed. Therefore, the gas discharged from the second scrubbing tower 357 is discharged into the atmosphere through the flue by the blower 361.

[0119] Among them, a flow sensor 4 and a pressure sensor are arranged on the water supply pipeline between the absorption tower 355 and the first scrubbing tower 356, which are respectively used to detect the flow rate and pressure of the injected water therein. A pressure sensor is arranged on the gas pipeline between the absorption tower 355 and the first scrubbing tower 356 to detect the pressure of the gas therein; a pressure sensor is arranged on the gas pipeline between the first scrubbing tower 356 and the second scrubbing tower 357 to detect the pressure of the gas therein. A pressure sensor is arranged on the gas pipeline between the second scrubbing tower 357 and the blower 361 to detect the pressure of the gas therein.

[0120] In the embodiment of the present application, when the roasting furnace 351 is in the water operation mode, the water sprayed into it is supplied by the first scrubbing tower 356, and the first scrubbing tower 356 inputs water into the roasting furnace 351 through a water pump for spraying.

[0121] Among them, the first scrubbing tower 356, the second scrubbing tower 357 and the absorption tower 355 are all packed towers, only with different diameters and heights. The blower 361 is driven by a variable frequency speed regulating motor, and the speed is automatically controlled by the preset vacuum degree of the roasting furnace 351, with a variation range of -25 mm to -50 mm water column.

[0122] Optionally, the controller 2 is further configured to:

[0123] Obtain the production data of the acid regeneration unit 3, where the production data includes at least one of flow data, pressure data, frequency data, temperature data, liquid level data, and opening data; draw a curve of the production data changing with time and display the curve on a preset display interface; determine alarm information according to the production data and a preset alarm value, and display the alarm information on the preset display interface.

[0124] In the embodiment of the present application, the production data generated in real time by the acid regeneration unit 3 is displayed on the human-machine interface, which enables the user to more intuitively see the changes in on-site production. At the same time, when the production data is abnormal, an alarm information reminder can be sent through the human-machine operation device 1, so that the user can discover the abnormality faster and handle it in time.

[0125] In the embodiment of the present application, based on the Wincc human-machine interface software and relying on the acid regeneration production process flow, the screen design of the human-machine operation interface is carried out, and the function of controlling production monitoring in the acid regeneration control room is realized online in the way of human-machine operation vision. Through the communication method of Transmission Control Protocol / Internet Protocol (TCP / IP), a data transmission path is established between the human-machine operation device 1 and the controller 2. Among them, the controller 2 can be a Siemens S7-400 series Programmable Logic Controller (PLC) system. First, a new TCP / IP variable connection is created in the SIMATIC S7 Protocol Suite. For example, new ARP1_PLC\ARP2_PLC (two acid regeneration units 3, it is recommended to have two communication channels), and the Internet Protocol (IP) address parameters of each variable are set: the address range is selected in the interval of 192.168.0.XX (the two acid regeneration systems have different IP addresses), and it corresponds to the Central Processing Unit (CPU) of the S7-400.

[0126] Secondly, in the connection module of the corresponding variable, an XLS format table is made for the data address, connection name, data type (binary variable, 32-bit floating point number, etc.), variable annotation, and variable name collected by the PLC, and it is imported into the connection module of the variable and saved. After the above steps are completed, the data communication between the PLC and the human-machine operation device 1 is realized.

[0127] In the human-machine operation device 1, the operator can perform manual / automatic, start / stop, switch operation controls on on-site devices such as motors, pumps, and valves, monitor the running status of the devices on the screen, and at the same time, frequency and opening degree settings can be realized for variable-frequency motors and adjustable valves, so as to realize parameter settings matching the process production. For on-site equipment failures, abnormal process parameters and other situations, an alarm screen is designed, and the alarm name and content are displayed for different alarms; at the same time, the voice alarm function is realized by making audio. The timeliness and effectiveness of production fault handling are effectively improved. By using the Trace curve function of the Wincc software, the functions of data storage, query, and comparison of production data and equipment operation indicators are realized. It provides a data basis for parameter optimization and analysis of the production process, and also provides a basis for analyzing the cause of faults.

[0128] Figure 4 It is a schematic diagram of a curve interface provided by the embodiment of the present application, as Figure 4As shown, the curves of each production data are displayed on the man-machine operation interface by curves of different colors. What color each production data curve corresponds to can be set according to the actual situation, and this application does not make any limitations on this.

[0129] Based on the same inventive concept, an embodiment of the present invention further provides a control method for an acid regeneration system. Figure 5 It is a flowchart of a control method for an acid regeneration system provided by an embodiment of the present invention. As Figure 5 shown, the method includes:

[0130] Step S510: Obtain the production data of the acid regeneration unit, where the production data includes at least one of flow data, pressure data, frequency data, temperature data, liquid level data, and opening data;

[0131] Step S520: Draw a curve of the production data changing with time and display the curve on a preset display interface;

[0132] Step S530: Determine alarm information according to the production data and a preset alarm value, and display the alarm information on a preset display interface.

[0133] An embodiment of the present invention further provides an electronic device, which may include a processor and a memory, where the processor and the memory may be communicatively connected to each other through a bus or other means.

[0134] The processor may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. chips, or a combination of the above various types of chips.

[0135] The memory may include a mass storage for data or instructions. By way of example and not limitation, the memory may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. In a suitable case, the memory may include a removable or non-removable (or fixed) medium. In a suitable case, the memory may be internal or external to the electronic device. In a particular embodiment, the memory may be a non-volatile solid-state memory.

[0136] In one example, the memory may be a read only memory (ROM). In one example, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0137] The processor reads and executes the computer program instructions stored in the memory to implement the control method of any one of the acid regeneration systems in the above embodiments.

[0138] In one example, the electronic device may further include a communication interface and a bus. Among them, the processor, the memory, and the communication interface are connected through the bus and communicate with each other. The communication interface is mainly used to implement the communication between the modules, devices, units, and / or devices in the embodiments of the present application. In a suitable case, the bus may include one or more buses.

[0139] In addition, in combination with the control method of the acid regeneration system in the above embodiments, the embodiments of the present invention may provide a computer-readable storage medium to implement. Computer program instructions are stored on the computer-readable storage medium; when the computer program instructions are executed by the processor, the control method of any one of the acid regeneration systems in the above embodiments is implemented.

[0140] Those skilled in the art can understand that to implement all or part of the processes in the methods of the above embodiments, it can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory, a Hard Disk Drive (abbreviation: HDD), or a Solid-State Drive (SSD), etc.; the storage medium can also include a combination of the above types of memories.

[0141] The technical solutions in the embodiments of the present application described above have at least the following technical effects or advantages:

[0142] An acid regeneration system, its control method, and medium provided by an embodiment of the present invention. The system includes a human-machine operation device, a controller, and an acid regeneration unit. The human-machine operation device is used to obtain a control instruction input by a user and send the control instruction to the controller; the controller is used to receive the control instruction sent by the human-machine operation device and send an execution instruction to the acid regeneration unit according to the control instruction, and remotely control the acid regeneration unit through the human-machine operation device and the controller; the acid regeneration unit is used to regenerate waste acid liquid based on the execution instruction to obtain regenerated acid and iron oxide powder. The execution instruction includes a steam condensate water volume execution instruction. The steam condensate water delivery device is used to control the water volume of the steam condensate water delivered to the purified iron liquid storage tank based on the steam condensate water volume execution instruction, and can also achieve the control of the condensate water volume; among them, the acid regeneration unit includes a desiliconization unit and a roasting unit; the desiliconization unit is used to perform desiliconization treatment on waste acid liquid to obtain purified iron liquid; the desiliconization unit includes a purified iron liquid storage tank for storing purified iron liquid and a steam condensate water delivery device for delivering steam condensate water to the purified iron liquid storage tank. The purified iron liquid is diluted by the steam condensate water to change the concentration of the purified iron liquid. After the purified iron liquid with the changed concentration is delivered to the roasting unit for roasting treatment, better-quality iron oxide powder can be obtained; the roasting unit is used to perform roasting treatment on the purified iron liquid to obtain iron oxide powder and regenerated acid.

[0143] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0144] Similarly, it should be understood that, for the purpose of streamlining the present disclosure and aiding in the understanding of one or more of the various inventive aspects, in the foregoing description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspects lie in less than all of the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate embodiment of the present invention.

[0145] It should be noted that the above embodiments illustrate rather than limit the present invention, and that alternative embodiments may be designed by those skilled in the art without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims listing several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words may be interpreted as names.

Claims

1. An acid regeneration system, characterized in that, The acid regeneration system includes a man-machine operation device, a controller, and an acid regeneration unit. The man-machine operation device is connected to the controller, and the controller is communicatively connected to the acid regeneration unit; The man-machine operation device is used to obtain a control instruction input by a user and send the control instruction to the controller; The controller is used to receive the control instruction sent by the man-machine operation device and send an execution instruction to the acid regeneration unit according to the control instruction; The acid regeneration unit is used to regenerate waste acid liquid based on the execution instruction to obtain regenerated acid and iron oxide powder; Among them, the acid regeneration unit includes a desiliconization unit and a roasting unit; the desiliconization unit is used to perform desiliconization treatment on waste acid liquid to obtain purified iron liquid; the desiliconization unit includes a purified iron liquid buffer tank for storing the purified iron liquid and a steam condensate conveying device for conveying steam condensate to the purified iron liquid buffer tank, and the steam condensate is used to dilute the purified iron liquid in the purified iron liquid buffer tank; the roasting unit is used to perform roasting treatment on the diluted purified iron liquid to obtain the iron oxide powder and the regenerated acid; The execution instruction includes a steam condensate quantity execution instruction, and the steam condensate conveying device is used to control the quantity of the steam condensate conveyed to the purified iron liquid buffer tank based on the steam condensate quantity execution instruction.

2. The acid regeneration system control method according to claim 1, wherein The desiliconization unit further includes a purified iron liquid storage tank and a purified iron liquid pump; the purified iron liquid pump is respectively connected to the purified iron liquid buffer tank and the purified iron liquid storage tank, and is used to pump the purified iron liquid in the purified iron liquid buffer tank into the purified iron liquid storage tank; The roasting unit includes a roasting furnace, a Venturi scrubber, a Venturi separator, and an absorption tower connected in sequence, and a concentrated iron liquid pump respectively connected to the Venturi separator and the roasting furnace; The purified iron liquid storage tank is used to provide the purified iron liquid for the Venturi separator; The Venturi separator is used to perform gas-liquid separation treatment on the purified iron liquid, and convey the liquid obtained after gas-liquid separation to the Venturi scrubber, and convey the gas obtained after gas-liquid separation to the absorption tower; The roasting furnace is used to convey the furnace gas generated to the Venturi scrubber; The Venturi scrubber is used to wash the liquid with the furnace gas to obtain a concentrated liquid, and convey the concentrated liquid back to the Venturi separator for gas-liquid separation to obtain concentrated iron liquid; The concentrated iron liquid pump is used to liquefy the concentrated iron liquid in the Venturi separator into a mist and spray it into the roasting furnace at a preset pressure, and the preset pressure is greater than the pressure threshold; The roasting furnace is used to make the concentrated iron liquid react with oxygen and water to obtain a reaction product of iron oxide; The absorption tower is used to dissolve hydrogen chloride in the gas with sprayed water to obtain a regenerated acid solution; a filler for increasing the dissolution area of the sprayed water and the hydrogen chloride is arranged in the absorption tower.

3. The acid regeneration system according to claim 2, characterized in that, The roasting unit further includes a first scrubber and a second scrubber connected to each other; The first scrubber is used to provide the sprayed water for the absorption tower; The absorption tower is further used to convey the undissolved gas to the first scrubber; The first scrubbing tower is used to perform the first scrubbing on the undissolved gas, obtain the gas after the first scrubbing, and transport the gas after the first scrubbing to the second scrubbing tower; The second scrubbing tower is used to perform the second scrubbing on the gas after the first scrubbing, obtain the gas after the second scrubbing, and discharge the gas after the second scrubbing into the atmosphere.

4. The acid regeneration system according to claim 1, characterized in that, The desilication unit further includes a heater, a neutralization tank, an unpurified molten iron buffer tank, a cooler, an acid-base adjustment tank, a flocculator, and a sedimentation tank that are connected in sequence. Scrap iron filings are installed in the neutralization tank; The heater is used to heat the waste acid solution and transport the heated waste acid solution to the neutralization tank; The neutralization tank is used to react the heated waste acid solution with the scrap iron filings to obtain unpurified molten iron, and transport the unpurified molten iron to the unpurified molten iron buffer tank; The unpurified molten iron buffer tank is used to provide the unpurified molten iron for the acid-base adjustment tank; The cooler is used to cool the unpurified molten iron; The acid-base adjustment tank is used to react the unpurified molten iron with the ammonia solution inside the acid-base adjustment tank to obtain an iron hydroxide solution, and transport the iron hydroxide solution to the flocculator; The flocculator is used to react the iron hydroxide solution with the flocculant inside the flocculator to obtain iron hydroxide flocs, and transport the iron hydroxide flocs to the sedimentation tank; The sedimentation tank is used to perform precipitation separation on the iron hydroxide flocs to obtain the purified molten iron, and transport the purified molten iron to the purified molten iron buffer tank; 5. The acid regeneration system according to claim 4, characterized in that, The desilication unit further includes a filter press, and the filter press is respectively connected to the sedimentation tank and the purified molten iron buffer tank; The sedimentation tank is further used to transport the silicon-containing sludge generated during the precipitation separation of the iron hydroxide flocs to the filter press; The filter press is used to dehydrate the silicon-containing sludge to obtain filtrate, and transport the filtrate to the purified molten iron buffer tank.

6. The acid regeneration system according to claim 4, wherein The acid-base adjustment tank includes a first acid-base adjustment tank and a second acid-base adjustment tank that are connected to each other. The first acid-base adjustment tank is connected to the cooler, and the second acid-base adjustment tank is connected to the flocculator; The first acid-base adjustment tank is used to react the unpurified molten iron with the ammonia solution inside the first acid-base adjustment tank to obtain unpurified molten iron with a first acid-base value, and transport the unpurified molten iron with the first acid-base value to the second acid-base adjustment tank; The second acid-base adjustment tank is used to react the unpurified molten iron with the first acid-base value with the ammonia solution inside the second acid-base adjustment tank to obtain an iron hydroxide solution with a second acid-base value; Wherein, the first acid-base value is less than the second acid-base value.

7. The acid regeneration system according to claim 4, characterized in that, The desilication unit further includes an unpurified molten iron filter arranged between the neutralization tank and the unpurified molten iron buffer tank, and is used to filter the unpurified molten iron.

8. The acid regeneration system according to claim 1, characterized in that, The controller is further used for: Obtain the production data of the acid regeneration unit, and the production data includes at least one of flow data, pressure data, frequency data, temperature data, liquid level data, and opening data; Draw a curve showing the change of the production data over time, and display the curve on a preset display interface; Determine alarm information based on the production data and a preset alarm value, and display the alarm information on a preset display interface.

9. A control method for an acid regeneration system, characterized in that, The method includes: Obtain the production data of the acid regeneration unit, where the production data includes at least one of flow data, pressure data, frequency data, temperature data, liquid level data, and opening data; Draw a curve showing the change of the production data over time, and display the curve on a preset display interface; Determine alarm information based on the production data and a preset alarm value, and display the alarm information on a preset display interface.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to execute the method recited in claim 9.

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