Desulfurization iron agent regeneration and separation unit

Abstract

This utility model discloses a device for regenerating and separating iron sulfide sludge. A first inlet for conveying iron sulfide sludge and a second inlet for conveying the reagent are provided on a high-temperature reaction tank. A temperature control unit is installed inside the high-temperature reaction tank to regulate the temperature. A membrane mesh structure driven by a motor and rotating at a certain speed is installed inside a vacuum drum, dividing the vacuum drum into an inner cavity and an outer cavity. The high-temperature reaction tank is connected to the inner cavity via pipelines. A solid separation system is connected to the inner cavity of the vacuum drum; a liquid separation system is connected to the outer cavity of the vacuum drum and is located below the liquid level in the vacuum drum; and a gas separation system is connected to the top of the vacuum drum. This device efficiently treats iron sulfide sludge in acidic or oxidizing environments and is suitable for the reaction of iron sulfide with hydrochloric acid or sodium hypochlorite. By optimizing the reaction process and separation system, the treatment efficiency is improved and the equipment footprint is reduced.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection and sludge treatment technology, specifically to a device for the regeneration and separation of desulfurizing iron agents. Background Technology

[0002] Produced water from oil and gas field development often contains a certain concentration of sulfides. These sulfides readily react chemically with metals to form iron sulfide deposits, accelerating metal surface corrosion and potentially causing malfunctions or leaks in pipelines, storage tanks, and other equipment, increasing maintenance and replacement costs. The concentration of hydrogen sulfide in produced water varies considerably between different oil and gas fields, generally ranging from a few milligrams per liter to several thousand milligrams per liter.

[0003] Oxidation and stripping / vacuum extraction methods for sulfur removal place high demands on equipment materials, reaction conditions, and investment and operating costs. In engineering applications, precipitation is the primary method for treating low-concentration sulfur-containing wastewater. This method utilizes the reaction of metal ions with sulfides to form insoluble precipitates, thereby removing sulfides from the wastewater. The most commonly used precipitants are ferric salts, including ferrous and ferrous salts. When the sulfide content is high, the amount of precipitant required is relatively large, necessitating the development of corresponding desulfurization agent recycling technologies to reduce operating costs. Currently, the main methods for recovering iron sulfide and converting it back into soluble metals are acid dissolution and alkaline oxidative leaching. Acid dissolution is simple and reaction conditions are easy to control, but the generated H2S requires treatment and causes severe corrosion to equipment, necessitating the use of acid-resistant materials. Alkaline oxidative leaching, when the iron sulfide content is low, requires a large amount of oxidant and alkali, resulting in higher unit costs. Utility Model Content

[0004] To address the aforementioned deficiencies in existing technologies, a desulfurization iron agent regeneration and separation device is provided. This device can efficiently treat iron sulfide sludge in acidic or oxidizing environments and is suitable for the reaction of iron sulfide with hydrochloric acid or sodium hypochlorite. By optimizing the reaction process and separation system, the device improves processing efficiency and reduces equipment footprint.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: Desulfurization iron agent regeneration and separation unit, including The high-temperature reaction vessel is equipped with a first inlet for conveying iron sulfide sludge and a second inlet for conveying reagents; a temperature control unit is installed inside the high-temperature reaction vessel to regulate the temperature inside the high-temperature reaction vessel. A vacuum rotating drum has a membrane mesh structure inside that is driven by a motor and rotates at a certain speed. The membrane mesh structure divides the vacuum rotating drum into an upper cavity and a lower cavity, or an inner cavity and an outer cavity. The high-temperature reaction vessel is connected to the lower cavity or the inner cavity through a pipeline. A solid separation system is connected to the lower or inner cavity of a vacuum rotary drum. A liquid separation system is connected to the upper or outer cavity of the vacuum drum and is located below the liquid level of the vacuum drum. The gas separation system is connected to the top of the vacuum drum.

[0006] According to the above technical solution, an acidic agent conveying pipeline and an alkaline oxidant conveying pipeline are connected in parallel to the second feed inlet.

[0007] According to the above technical solution, the temperature control range of the temperature control unit of the high-temperature reaction vessel is 40°C to 60°C. When the acid agent delivery pipeline is connected to the high-temperature reaction tank, the temperature inside the high-temperature reaction tank is 45°C to 60°C. When the alkaline oxidant delivery pipeline is connected to the high-temperature reaction vessel, the temperature inside the high-temperature reaction vessel is 60°C to 80°C.

[0008] According to the above technical solution, the acidic agent delivery pipeline delivers hydrochloric acid solution; the alkaline oxidant delivery pipeline delivers sodium hypochlorite solution.

[0009] According to the above technical solution, the membrane network structure is a cylindrical structure, which divides the vacuum rotating cylinder into an internal cavity and an external cavity; the cylindrical structure is connected to the output shaft of the motor through a transmission frame, and the rotation center line of the cylindrical structure coincides with the axis of the cylindrical structure; the cylindrical structure is composed of coarse or microfiltration organic separation membrane or inorganic ceramic membrane, with an average pore size of less than 10 μm.

[0010] According to the above technical solution, the rotational speed of the vacuum drum is 10 to 50 revolutions per minute.

[0011] According to the above technical solution, the temperature control unit is a water bath temperature control system, including a water bath jacket installed on the high-temperature reaction tank, a circulating water inlet pipe and a circulating water outlet pipe connected to the water bath jacket, with higher heat water input through the circulating water inlet pipe and lower heat water output through the circulating water outlet pipe.

[0012] According to the above technical solution, a stirring device is provided inside the high-temperature reaction vessel.

[0013] According to the above technical solution, the liquid separation system includes a main pipeline, several regeneration tanks connected in parallel to the main pipeline, a regenerated liquid storage tank connected to the bottom of the side wall of all the regeneration tanks, and a slag discharge pipeline and a liquid discharge pipeline connected to the regenerated liquid storage tank; the slag discharge pipeline is located at the bottom of the side wall of the regenerated liquid storage tank, and the liquid discharge pipeline is located in the area above the slag discharge pipeline; the other end of the liquid discharge pipeline is connected to the second feed inlet; The bottom of the vacuum rotary drum is a conical cavity structure, which is connected to the solid separation system.

[0014] According to the above technical solution, the gas separation system includes branch pipes that are respectively connected to the high-temperature reaction tank, the vacuum drum, the regeneration tank, and the regeneration liquid storage tank, a main pipe that is connected to all the branch pipes, a vacuum pump installed on the main pipe, and a gas collection device located at the end of the main pipe.

[0015] This utility model has the following beneficial effects: 1. Equipped with a vacuum rotary drum and a high-temperature reaction tank, it can efficiently separate and discharge the gaseous, liquid, and solid products generated by chemical reactions under acidic or oxidizing environments; it completes the regeneration treatment of iron sulfide sludge, while simultaneously achieving efficient separation and recovery of reaction byproducts. This not only improves the equipment's processing efficiency and regeneration reaction speed but also significantly shortens the solid-liquid separation time, optimizes the separation effect, and greatly reduces the equipment's footprint, solving the problem of excessively large footprint required for regeneration equipment in high-sulfur wastewater treatment units.

[0016] 2. The second feed inlet is connected in parallel to an acidic agent delivery pipeline and an alkaline oxidant delivery pipeline. This device can not only treat hydrogen sulfide gas and ferric chloride solution generated by the reaction of ferric sulfide with hydrochloric acid, but also ferric hydroxide particles and sodium sulfate solution generated by the reaction of ferric sulfide with sodium hypochlorite. Through the multifunctional design of this device, users can select appropriate treatment schemes according to the composition of the sludge, flexibly addressing different types of wastewater and sludge problems.

[0017] 3. A stirring device is installed inside the high-temperature reaction tank. The reagents and sludge are thoroughly mixed under the action of the stirring device to ensure the uniformity of the chemical reaction. The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0019] Figure 1 This is a flowchart illustrating an embodiment of the present invention; Figure 2 This is a schematic diagram of an embodiment provided by this utility model; Figure 3 This is a schematic diagram of an embodiment provided by this utility model; In the diagram, 1. High-temperature reaction vessel; 2. First feed inlet; 3. Second feed inlet; 4. Temperature control unit; 4-1. Water bath jacket; 4-2. Circulating water inlet pipe; 4-3. Circulating water outlet pipe; 5. Vacuum rotary drum; 6. Membrane mesh structure; 6-1. Internal cavity; 6-2. External cavity; 7. Solid separation system; 8. Liquid separation system; 8-1. Main pipe; 8-2. Regeneration tank; 8-3. Regenerated liquid storage tank; 8-4. Slag discharge pipe; 8-5. Liquid discharge pipe; 9. Gas separation system; 9-1. Branch pipe; 9-2. Main pipe; 9-3. Vacuum pump; 9-4. Gas collection device; 10. Stirring device. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-3 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0021] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Reference Figures 1-3 As shown, this utility model provides a desulfurization iron agent regeneration and separation device.

[0024] Example 1 It includes a high-temperature reaction tank 1, a first inlet 2 for conveying iron sulfide sludge and a second inlet 3 for conveying reagents; and a temperature control unit 4 inside the high-temperature reaction tank for regulating the temperature inside the high-temperature reaction tank.

[0025] The vacuum drum 5 contains a membrane mesh structure 6, driven by a motor and rotating at a certain speed. This membrane mesh structure divides the vacuum drum into an upper cavity and a lower cavity (or an inner cavity 6-1 and an outer cavity 6-2). The high-temperature reaction vessel is connected to the lower cavity or the inner cavity via pipelines. The vacuum drum is made of high-temperature and corrosion-resistant stainless steel to ensure long-term stable operation in acidic or oxidizing environments. The use of multi-layer insulation materials ensures that the high temperature in the reaction zone does not affect the external operating environment.

[0026] Solid separation system 7, the solid separation system is connected to the lower cavity or the inner cavity of the vacuum drum; Liquid separation system 8, the liquid separation system is connected to the upper cavity or the outer cavity of the vacuum drum and is located below the liquid level of the vacuum drum; used for the solution produced by the reaction.

[0027] Gas separation system 9 is connected to the top of the vacuum drum. The hydrogen sulfide generated in the reaction is collected through the gas separation system to prevent harmful gases from leaking into the external environment.

[0028] In the aforementioned apparatus, the reagents and iron sulfide sludge are added to a high-temperature reaction tank. A temperature control unit maintains the temperature within the tank within the optimal reaction range for both the reagents and the iron sulfide sludge. After the reagents and iron sulfide solution have fully mixed and reacted within the tank, the reactants are transported through pipelines to the lower or inner space of a vacuum rotating drum. The membrane structure within the vacuum rotating drum rotates at a specific speed, mechanically separating the sludge using a combination of centrifugal force and gravity. The gaseous and liquid portions of the reactants pass through the membrane structure and enter the upper or outer cavity of the vacuum rotating drum. The gas separation system generates negative pressure, drawing the gaseous portion from the upper or outer cavity to an external alkaline spray tower for adsorption. The liquid separation system, located below the liquid level, collects and processes the liquid portion from the upper or outer cavity of the vacuum rotating drum.

[0029] Based on the above structure, it is equipped with a vacuum rotary drum and a high-temperature reaction tank, enabling efficient separation and discharge of the gaseous, liquid, and solid products generated during chemical reactions in acidic or oxidizing environments. This allows for the regeneration of iron sulfide sludge while simultaneously achieving efficient separation and recovery of reaction byproducts. This not only improves the equipment's processing efficiency and regeneration reaction speed but also significantly shortens the solid-liquid separation time, optimizes the separation effect, and greatly reduces the equipment's footprint, solving the problem of excessively large footprint required for regeneration equipment in high-sulfur wastewater treatment units.

[0030] Example 2 Based on the above structure, the second feed inlet is connected in parallel to an acidic agent delivery pipeline and an alkaline oxidant delivery pipeline. Depending on the iron content in the generated iron sludge, the second feed inlet is connected to different reagent pipelines to obtain different regeneration schemes. The appropriate recovery method is selected based on the different sulfide water qualities. When the sulfur content in the produced water is low, the iron sludge generated by the precipitation method has a low iron content, making acid recovery regeneration more economical. When the sulfur content in the produced water is high, the iron sludge generated by the precipitation method has a high iron content, making alkaline oxidative leaching more efficient.

[0031] Preferably, the acidic agent delivery pipeline delivers hydrochloric acid solution; the alkaline oxidant delivery pipeline delivers sodium hypochlorite solution.

[0032] The temperature control unit of the high-temperature reaction vessel has a temperature control range of 40°C to 60°C to match different chemical reactions.

[0033] Since the optimal reaction temperature between hydrochloric acid and iron sulfide is 45°C to 60°C, when the acidic agent delivery pipeline is connected to the high-temperature reaction tank, the temperature inside the high-temperature reaction tank is 45°C to 60°C to ensure the reaction proceeds fully and improve the regeneration rate.

[0034] Since the optimal temperature for the reaction between sodium hypochlorite and iron sulfide is 60°C to 80°C, when the alkaline oxidant delivery pipeline is connected to the high-temperature reaction tank, the temperature inside the high-temperature reaction tank is maintained at 60°C to 80°C to ensure the reaction proceeds fully and to improve the regeneration rate.

[0035] In the above embodiments, the membrane structure is a cylindrical structure, which divides the vacuum drum into an inner cavity and an outer cavity. The cylindrical structure is connected to the output shaft of the motor via a transmission frame, and the rotation center line of the cylindrical structure coincides with its axis. The cylindrical structure is composed of a coarse or microfiltration organic separation membrane or an inorganic ceramic membrane, with an average pore size of less than 10 μm. Preferably, the rotation speed of the vacuum drum is 10 to 50 rpm to ensure that the sludge is fully mixed within the drum, achieving a uniform chemical reaction.

[0036] In the above embodiment, the temperature control unit is a water bath temperature control system, including a water bath jacket 4-1 installed on the high-temperature reaction vessel, a circulating water inlet pipe 4-2 and a circulating water outlet pipe 4-3 connected to the water bath jacket. Higher-temperature water is input through the circulating water inlet pipe, and lower-temperature water is output through the circulating water outlet pipe. The water bath jacket provides circulating heating, and the jacket water temperature is precisely controlled by an external water bath. The high-temperature reaction vessel employs a multi-stage heating system, enabling precise temperature control and ensuring that temperature fluctuations in the reaction zone remain within ±2℃, thus guaranteeing the optimal reaction rate.

[0037] In the above embodiment, a stirring device 10 is provided inside the high-temperature reaction tank. The reagent and sludge are fully mixed under the action of the stirring device to ensure the uniformity of the chemical reaction.

[0038] In the above embodiment, the liquid separation system includes a main pipeline 8-1, several regeneration tanks 8-2 connected in parallel to the main pipeline, a regenerated liquid storage tank 8-3 connected to the bottom of the sidewall of all the regeneration tanks, and a slag discharge pipeline 8-4 and a liquid discharge pipeline 8-5 connected to the regenerated liquid storage tank. The slag discharge pipeline is located at the bottom of the sidewall of the regenerated liquid storage tank, and the liquid discharge pipeline is located above the slag discharge pipeline. The other end of the liquid discharge pipeline is connected to a second feed port. The liquid separation system can separate ferric chloride solution generated by the reaction of ferric sulfide and hydrochloric acid, or sodium sulfate solution generated by the reaction of sodium hypochlorite. The separated ferric chloride solution can be used as a desulfurizing agent for further desulfurization, and the separated sodium sulfate solution can be concentrated to produce salt.

[0039] The bottom of the vacuum drum is a conical cavity structure, which is connected to the solid separation system. The solid ferric hydroxide particles generated by the oxidation regeneration reaction flow out of the lower or inner cavity of the vacuum drum through the holes at the bottom of the drum (the connection port to the solid separation system). They are then recycled as a desulfurizing agent after acidification.

[0040] In the above embodiments, the gas separation system includes branch pipes 9-1 connected to the high-temperature reaction tank, vacuum drum, regeneration tank, and regenerated liquid storage tank, respectively; a main pipe 9-2 connected to all branch pipes; a vacuum pump 9-3 mounted on the main pipe; and a gas collection device 9-4 located at the end of the main pipe. The gas separation system uses the vacuum pump to create a reduced-pressure environment at the connection points of the high-temperature reaction tank, vacuum drum, regeneration tank, and regenerated liquid storage tank, effectively extracting gases generated during the reaction, such as hydrogen sulfide, and preventing gas accumulation from interfering with the reaction. The gas collection device efficiently captures the hydrogen sulfide and discharges it through a one-way valve, preventing harmful gases from leaking into the external environment; the discharged hydrogen sulfide gas is then introduced into an alkaline spray tower for adsorption.

[0041] In the above embodiments, a central control system is also provided. This central control system can automatically adjust the rotational speed and reaction temperature of the drum according to the feed rate at the second inlet, and monitor the emission of gaseous, liquid, and solid products generated in the reaction in real time through sensors. The system can dynamically adjust to the needs of different reactants, ensuring the efficiency and safety of the processing.

[0042] In the above embodiments, the device is designed with a self-cleaning system to ensure that the internal working efficiency is not reduced due to sludge adhesion during the treatment process. Automatic cleaning is achieved through periodic reversal, preventing residue from affecting subsequent processing operations. Through the optimized equipment structure and reaction control system described above, sludge treatment efficiency is significantly improved, the equipment footprint is reduced, and the problems of long processing times and large footprints in existing technologies are solved.

[0043] like Figure 3 As shown, in order to ensure the delivery of the solution, a delivery pump is installed on the corresponding pipeline.

[0044] The process of using this device: Application Example 1: Reaction treatment of iron sulfide with hydrochloric acid Iron sulfide sludge and hydrochloric acid enter the high-temperature reaction tank of the device through the first and second inlets, respectively. Within this area, the reaction temperature of the high-temperature reaction tank is controlled at 50°C by a temperature control unit (circulating water inlet and outlet pipes) to ensure optimal reaction efficiency between the hydrochloric acid and iron sulfide. Inside the high-temperature reaction tank, the reagents and sludge are thoroughly mixed by a stirring device to ensure the uniformity of the chemical reaction.

[0045] After mixing and heating, the reactants are fed into a vacuum rotary drum structure. Inside the drum, a motor drives the membrane mesh structure to rotate at 20 revolutions per minute, continuing the mechanical separation of the sludge (cyclone separation, utilizing a combination of centrifugation and gravity to achieve solid-liquid phase separation). Due to the suction effect of the vacuum pump, the hydrogen sulfide gas generated during the reaction is rapidly discharged through a one-way exhaust valve located on the branch pipe and captured by a gas trap to prevent gas leakage. The ferric chloride solution enters the regeneration tank for regeneration through the main pipe on the side wall of the vacuum rotary drum and is stored in the regenerated liquid storage tank. 2% of the regenerated slag is discharged through the slag discharge pipe, and 98% of the regenerated liquid is pumped back to the second inlet by a transfer pump located on the drain pipe for reuse as a desulfurizing agent. At the same time, low-speed centrifugation effectively separates the scum, which is discharged from the bottom of the conical cavity structure through the solid separation system.

[0046] During the treatment process, the device automatically reverses the motor to activate the internal cleaning system, ensuring no residue remains inside the equipment and maintaining its processing efficiency. Throughout the process, the ferric chloride solution contains 85% of the iron in the sludge, and the hydrogen sulfide gas capture efficiency reaches 98%. The entire reaction process takes 4 hours, and the device has a processing capacity of 500 liters of ferric sulfide-containing sludge per hour.

[0047] Application Example 2: Reaction Treatment of Iron Sulfide with Sodium Hypochlorite Iron sulfide sludge and sodium hypochlorite solution are fed into a high-temperature reaction tank through the first and second inlets, respectively. The reaction temperature in the high-temperature reaction tank is controlled at 70°C by a temperature control unit (circulating water inlet and outlet pipes). At this temperature, a stirring device ensures thorough mixing of the sodium hypochlorite and iron sulfide sludge, guaranteeing a rapid and uniform chemical reaction. After the reaction, the mixture is fed into a vacuum rotary drum. A motor drives the membrane structure to rotate at 30 revolutions per minute, utilizing vacuum and centrifugal force to rapidly complete solid-liquid separation.

[0048] The ferric hydroxide particles generated by the reaction settle under centrifugal force and are discharged from the bottom of the conical cavity structure through the solid separation system. At the same time, the sodium sulfate solution enters the regeneration tank through the main pipe on the side wall of the vacuum drum for regeneration and is stored in the regenerated liquid storage tank. 2% of the regenerated slag is discharged from the outlet 12, and 98% of the regenerated liquid is returned to the feed inlet 1 by the pump 13 and used again as a desulfurizing agent.

[0049] The temperature throughout the process was controlled within ±2℃, ensuring the high efficiency and stability of the reaction. The total iron molar recovery rate in the treated sludge reached 80%. The entire treatment process lasted 3 hours, and the device could process 2000 liters of sludge per hour.

[0050] Through the two application examples above, this utility model demonstrates its multifunctional processing capabilities under different chemical reaction environments. By combining mixing and heating with rapid mechanical separation, the device not only significantly improves sludge treatment efficiency but also maximizes resource recovery and utilization through a highly efficient separation system. This design reduces the equipment footprint while greatly improving the speed and efficiency of sludge treatment, meeting the high standards required for sulfur-containing wastewater treatment in practical applications.

[0051] In existing technologies, unused or simply utilized sludge requires significant space for sludge storage and drying. This device greatly reduces the land area required for treatment and shortens the processing time. It can process 50 to 2000 liters of sludge containing iron sulfide per hour, and the molar amount of iron in the regenerated liquid after treatment is more than 80% of the molar amount before regeneration, significantly improving resource recovery efficiency.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A desulfurization iron agent regeneration and separation device, characterized in that: include The high-temperature reaction vessel is equipped with a first inlet for conveying iron sulfide sludge and a second inlet for conveying reagents; a temperature control unit is installed inside the high-temperature reaction vessel to regulate the temperature inside the high-temperature reaction vessel. A vacuum rotating drum has a membrane mesh structure inside that is driven by a motor and rotates at a certain speed. The membrane mesh structure divides the vacuum rotating drum into an upper cavity and a lower cavity, or an inner cavity and an outer cavity. The high-temperature reaction vessel is connected to the lower cavity or the inner cavity through a pipeline. A solid separation system is connected to the lower or inner cavity of a vacuum rotary drum. A liquid separation system is connected to the upper or outer cavity of the vacuum drum and is located below the liquid level of the vacuum drum. The gas separation system is connected to the top of the vacuum drum.

2. The desulfurization iron agent regeneration and separation device according to claim 1, characterized in that: The second feed inlet is connected in parallel to an acidic agent delivery pipeline and an alkaline oxidant delivery pipeline.

3. The desulfurization iron agent regeneration and separation device according to claim 2, characterized in that: The temperature control unit of the high-temperature reaction vessel has a temperature control range of 40°C to 60°C. When the acid agent delivery pipeline is connected to the high-temperature reaction tank, the temperature inside the high-temperature reaction tank is 45°C to 60°C. When the alkaline oxidant delivery pipeline is connected to the high-temperature reaction vessel, the temperature inside the high-temperature reaction vessel is 60°C to 80°C.

4. The desulfurization iron agent regeneration and separation device according to claim 2, characterized in that: The acidic agent delivery pipeline delivers hydrochloric acid solution; the alkaline oxidizing agent delivery pipeline delivers sodium hypochlorite solution.

5. The desulfurization iron agent regeneration and separation device according to claim 1, characterized in that: The membrane structure is a cylindrical structure, which divides the vacuum rotating cylinder into an inner cavity and an outer cavity. The cylindrical structure is connected to the output shaft of the motor through a transmission frame, and the rotation center line of the cylindrical structure coincides with the axis of the cylindrical structure. The cylindrical structure is composed of coarse or microfiltration organic separation membranes or inorganic ceramic membranes with an average pore size of less than 10 μm.

6. The desulfurization iron agent regeneration and separation device according to claim 1, characterized in that: The speed of the vacuum drum is 10 to 50 revolutions per minute.

7. The desulfurization iron agent regeneration and separation device according to claim 1, characterized in that: The temperature control unit is a water bath temperature control system, including a water bath jacket installed on the high-temperature reaction tank, a circulating water inlet pipe and a circulating water outlet pipe connected to the water bath jacket, with higher heat water input through the circulating water inlet pipe and lower heat water output through the circulating water outlet pipe.

8. The desulfurization iron agent regeneration and separation device according to claim 1, characterized in that: A stirring device is provided inside the high-temperature reaction vessel.

9. The desulfurization iron agent regeneration and separation device according to claim 1, characterized in that: The liquid separation system includes a main pipeline, several regeneration tanks connected in parallel to the main pipeline, a regenerated liquid storage tank connected to the bottom of the side wall of all the regeneration tanks, and a slag discharge pipeline and a liquid discharge pipeline connected to the regenerated liquid storage tank; the slag discharge pipeline is located at the bottom of the side wall of the regenerated liquid storage tank, and the liquid discharge pipeline is located in the area above the slag discharge pipeline; the other end of the liquid discharge pipeline is connected to the second feed inlet. The bottom of the vacuum drum is a conical cavity structure, which is connected to the solid separation system.

10. The desulfurization iron agent regeneration and separation device according to claim 9, characterized in that: The gas separation system includes branch pipes that are connected to the high-temperature reaction tank, vacuum drum, regeneration tank, and regeneration liquid storage tank respectively, a main pipe that is connected to all branch pipes, a vacuum pump installed on the main pipe, and a gas collection device located at the end of the main pipe.

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