A device and method for producing ferrous sulfate high-temperature crystal

Abstract

The application discloses a ferrous sulfate high-temperature crystallization production device and a production method, which comprise a temperature adjusting tank, an energy-saving mechanism is arranged outside the temperature adjusting tank, the energy-saving mechanism comprises a heat pump and a water storage tank, the inside of the heat pump and the inside of the water storage tank are connected through two circulating pipes, water pipes are connected through both sides of the inside of the water storage tank, connecting pipes are connected through both sides of the inside of the heat pump, one end of the connecting pipe is connected with a spiral pipe through a flange, the spiral pipe is arranged on the outer surface of the temperature adjusting tank, and a condenser pipe is fixedly connected through the outer surface of the spiral pipe, and the application relates to the technical field of ferrous sulfate production devices, solves the problem that in the production process of the existing ferrous sulfate high-temperature crystallization production device, steam generated by flash evaporation and heat energy lost by concentrated raw material liquid cooling are directly lost in the external air, heat is wasted, and the energy-saving and environmental protection concept is not met.

Description

Technical Field

[0001] This invention relates to the technical field of ferrous sulfate production equipment, specifically to a high-temperature crystallization production equipment and method for ferrous sulfate. Background Technology

[0002] Ferrous sulfate has a wide range of applications. In medicine, it can be used to treat common iron deficiency diseases. It can also be used as an additive in health foods and livestock feed. Traditional production methods are limited by raw material waste liquid and can only use low-temperature crystallization process to obtain ferrous sulfate heptahydrate. In the dehydration process, the low-temperature dehydration process is long and energy-intensive, while high-temperature dehydration makes ferrous sulfate easily oxidized, affecting product quality. A high-temperature crystallization production device for ferrous sulfate with publication number CN216259157U includes a heating and concentration system, a crystallization system and a solid-liquid separation system. During the production operation, the principle of dissolution crystallization is used. Through circulating heating, high-temperature crystallization and control of solid-liquid ratio, etc., ferrous sulfate monohydrate with large particles, low moisture content, loose and non-caking, and easy to transport is produced.

[0003] Although this device has the above advantages, it still has the following drawbacks in actual production:

[0004] 1) The device discharges the steam generated by the heater and flash tank into the condenser for condensation and cooling. However, no heat recovery measures are set up during condensation, resulting in the direct discharge to the outside environment and waste.

[0005] 2) During the production of this device, the concentrated and crystallized raw material liquid will enter the temperature regulating tank for cooling. However, no recovery measures are set up for the heat energy lost during cooling, resulting in direct loss to the outside world and waste.

[0006] The waste caused by heat loss is inconsistent with the concept of energy conservation and environmental protection, so it is necessary to address the above-mentioned problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a high-temperature crystallization production apparatus and method for ferrous sulfate, which solves the problem that in the existing high-temperature crystallization production apparatus for ferrous sulfate, the steam generated by flash evaporation and the heat lost during the cooling of the concentrated raw material liquid are directly dissipated into the outside air, resulting in heat waste and failing to meet the concept of energy conservation and environmental protection.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature crystallization production apparatus for ferrous sulfate, comprising a temperature-regulating tank, an energy-saving mechanism externally arranged on the temperature-regulating tank, the energy-saving mechanism comprising a heat pump and a water storage tank, the interior of the heat pump and the interior of the water storage tank being connected by two circulation pipes, water pipes penetrating through both sides of the interior of the water storage tank, connecting pipes penetrating through both sides of the interior of the heat pump, a spiral pipe connected to one end of the connecting pipe via a flange, the spiral pipe being sleeved on the outer surface of the temperature-regulating tank, a condenser pipe being fixedly connected through the outer surface of the spiral pipe, a cleaning component being arranged inside the condenser pipe, a feed pipe penetrating through the interior of the condenser pipe, the outer surface of the spiral pipe being fixedly connected through the interior of the feed pipe, and an air inlet pipe penetrating through the interior of the condenser pipe.

[0009] Preferably, the cleaning assembly includes a sealing block and a flushing pipe. The interior of the flushing pipe is in through communication with the interior of the condenser pipe. A flushing unit is provided on the outside of the sealing block. The outer surface of the sealing block is movably connected to the inner surface of the condenser pipe. A through circular groove is provided inside the sealing block. The inner surface of the circular groove is movably connected to the outer surface of the spiral tube.

[0010] Preferably, an electric push rod is fixedly connected to the outer surface of the sealing block, the output end of the electric push rod is movably connected to the interior of the condenser tube, the outer surface of the electric push rod is fixedly connected to the outer surface of the condenser tube, a flow guide groove is formed on the outer surface of the sealing block, a one-way valve is connected to the interior of the flow guide groove, and the outer surface of the one-way valve is fixedly connected to the interior of the sealing block.

[0011] Preferably, the inner surface of the flushing pipe is movably connected to a sliding pipe, the outer surface of the sliding pipe is movably connected to the inner surface of the guide groove, one end of the sliding pipe is provided with an inclined surface, the outer surface of the inclined surface is movably connected to the inner surface of the guide groove, the outer surface of the sliding pipe is movably connected to a filter plate, and the outer surface of the filter plate is fixedly connected to the inner surface of the flushing pipe.

[0012] Preferably, the slide tube has a through hole inside, and a sealing column is movably connected to the inner surface of the through hole. The outer surface of the sealing column is fixedly connected to the outer surface of the filter plate. A telescopic rod is fixedly connected to the outer surface of the filter plate. The output end of the telescopic rod is movably connected to the inside of the filter plate, and the output end of the telescopic rod is fixedly connected to the outer surface of the slide tube.

[0013] Preferably, the rinsing unit includes a discharge pipe, one end of which is connected to one end of a feed pipe via a flange. A solenoid valve is provided on the outer surface of the discharge pipe, and a regulating pipe is connected through the inside of the discharge pipe. A sealing plug is movably connected to the inner surface of the regulating pipe.

[0014] Preferably, a lifting rod is fixedly connected to the outer surface of the sealing plug, one end of the lifting rod is fixedly connected to the inner surface of the adjusting tube, a hydraulic rod is fixedly connected to the inner surface of the adjusting tube, a push plate is fixedly connected to the output end of the hydraulic rod, and the outer surface of the push plate is movably connected to the outer surface of the sealing plug.

[0015] The present invention also discloses a method for dust removal from the inner wall of a metal smelting furnace, specifically including the following features:

[0016] Step 1, Preheating and Recovery: First, the flash-evaporated ferrous sulfate raw material solution enters the temperature control tank. Subsequently, the cooling liquid circulates externally within the spiral tube and the heat pump, absorbing heat through the temperature control tank. When the temperature of the ferrous sulfate raw material solution drops to the required value, it is transported from the temperature control tank to the crystallization tank for the next step of processing. When the cooling liquid inside the spiral tube flows through the condenser, the steam generated by flash evaporation enters the condenser through the inlet pipe and is cooled by absorbing heat through contact with the spiral tube. The cooled waste gas and condensed waste liquid are discharged to the outside of the condenser through the discharge pipe. The cooling liquid carries the absorbed heat into the heat pump, which absorbs and compresses the heat of the cooling liquid. At the same time, liquid water enters through the water pipe at the bottom of the water tank. The liquid water circulates within the water tank and the heat pump through the circulation pipes on both sides, and is heated after entering the heat pump before being discharged through the water pipe at the top of the water tank.

[0017] Step 2, Preliminary Cleaning: After production is completed, the output end of the electric push rod extends, driving the sealing block to descend inside the condenser tube. The sealing block cleans the outer surface of the spiral tube inside the condenser tube and the inner wall of the condenser tube. At the same time, after the sealing block descends, the guide groove is released from the pressure on the inclined surface. The slide tube is slid from the inside of the flushing tube to the inside of the condenser tube under the elastic force of the telescopic rod. The sealing column is released from the blockage of the through hole. The liquid water in the flushing tube flows into the inside of the condenser tube through the through hole and the slide tube, and through the action of the one-way valve, it flushes the lower part of the inside of the condenser tube.

[0018] Step 3, Flushing and Cleaning: After the sealing block performs a simple cleaning of the inside of the condenser tube, the solenoid valve on the discharge pipe is closed, and the hydraulic rod output end retracts, causing the push plate to disengage from the support of the sealing plug. As liquid water is added to the inside of the condenser tube through the flushing pipe, the liquid level inside the condenser tube rises. Subsequently, the electric push rod drives the sealing block to move repeatedly inside the condenser tube. Due to the pressure, the liquid water will push down the sealing plug and enter the regulating pipe. Through the repeated movement of the liquid water, the inside of the condenser tube can be flushed, completing the cleaning of the inner wall of the condenser tube discharge pipe and the outer surface of the spiral tube.

[0019] Beneficial effects

[0020] This invention provides a high-temperature crystallization apparatus and method for producing ferrous sulfate. Compared with the prior art, it has the following advantages:

[0021] (1) By setting up an energy-saving mechanism, the circulating cooling liquid is used to exchange heat with the steam and concentrated raw material liquid, and the heat energy is compressed by the heat pump and the liquid water inside the water storage tank is heated to meet the needs of production and life, thereby avoiding the waste of heat and reducing cost losses, thus conforming to the production concept of energy conservation and environmental protection.

[0022] (2) By setting up a cleaning component, the electric push rod extends and retracts, driving the sealing block to move to clean the inside of the condenser tube, ensuring the cleanliness of the inside of the condenser tube, thereby avoiding the accumulation of acidic condensate and water vapor inside the condenser tube, which would cause damage to the inside of the condenser tube, thus avoiding a reduction in the service life of the condenser tube and the spiral tube.

[0023] (3) By setting up structures such as sliding pipes, the sliding pipes are connected to the guide grooves through the inclined surface, and are elastically extended and retracted with the telescopic rods, so that the sliding pipes can move according to the movement of the sealing block, thereby controlling the contact between the sealing column and the through hole, so as to achieve automatic water supply and improve the ease of cleaning.

[0024] (4) By setting up a flushing unit, the hydraulic rod and push plate drive the movement of the sealing plug, which can control the connection between the discharge pipe and the regulating pipe. At the same time, the cooperation between the lifting rod and the sealing plug can control the capacity of the regulating pipe connection, so as to cooperate with the sealing block to drive the liquid water movement, thereby achieving the best cleaning of the inside of the condenser tube through flushing, which greatly delays the reduction of service life. Attached Figure Description

[0025] Figure 1 This is a perspective view of the external structure of the present invention;

[0026] Figure 2 This is a cross-sectional view of the internal structure of the condenser tube of the present invention;

[0027] Figure 3 This is a cross-sectional view of the external structure of the sealing block of the present invention;

[0028] Figure 4 This is a cross-sectional view of the internal structure of the flushing tube of the present invention;

[0029] Figure 5 This is a cross-sectional view of the internal structure of the regulating tube of the present invention.

[0030] In the diagram: 1. Temperature regulating tank; 2. Heat pump; 3. Water storage tank; 4. Circulation pipe; 5. Water pipe; 6. Connecting pipe; 7. Spiral pipe; 8. Condenser pipe; 9. Cleaning assembly; 91. Sealing block; 92. Flushing pipe; 921. Sliding pipe; 922. Inclined surface; 923. Filter plate; 924. Through hole; 925. Sealing column; 926. Telescopic rod; 93. Flushing unit; 931. Discharge pipe; 932. Solenoid valve; 933. Adjusting pipe; 934. Sealing plug; 935. Lifting rod; 936. Hydraulic rod; 937. Push plate; 94. Circular groove; 95. Electric push rod; 96. Guide groove; 97. One-way valve; 10. Discharge pipe; 11. Air inlet pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-5 This invention provides a technical solution: a high-temperature crystallization production apparatus for ferrous sulfate.

[0033] Example 1:

[0034] Reference manual attached Figure 1The system includes a temperature-regulating tank 1. The inlet of the temperature-regulating tank 1 is connected to the outlet of an external flash tank, and the outlet of the temperature-regulating tank 1 is connected to the inlet of an external crystallizer. An energy-saving mechanism is installed on the exterior of the temperature-regulating tank 1, comprising a heat pump 2 and a water storage tank 3. The heat pump 2 is electrically connected to an external control circuit. The water storage tank 3 contains pure liquid water. The interior of the heat pump 2 and the interior of the water storage tank 3 are connected by two circulation pipes 4. Water pipes 5 penetrate both sides of the interior of the water storage tank 3. The water pipe 5 at the bottom of the water storage tank 3 (not shown in the figure) is connected to an external pure liquid water source, and the water pipe 5 at the top of the water storage tank 3 is connected to an external water supply terminal. Connecting pipes 6 penetrate both sides of the interior of the heat pump 2. One end of the connecting pipe 6 is connected to a spiral pipe 7 via a flange (not shown in the figure). One end of the lower connecting pipe 6 is connected to one end of the spiral pipe 7 via a conduit (not shown in the figure). The spiral pipe 7 is fitted onto the temperature-regulating tank 1. The outer surface of the spiral tube 7, where it is exposed to the outside, is covered with insulation material to prevent heat loss. The portion of the spiral tube 7 inside the condenser tube 8 is straight. The condenser tube 8 is fixedly connected to the outer surface of the spiral tube 7. The condenser tube 8 is made of insulation material and has a cleaning component 9 inside. A feed pipe 10 is connected to the inside of the condenser tube 8. The outer surface of the spiral tube 7 is fixedly connected to the inside of the feed pipe 10. An air inlet pipe 11 is connected to the inside of the condenser tube 8. One end of the air inlet pipe 11 is connected to the exhaust end of the flash tank. By setting up an energy-saving mechanism, the circulating cooling liquid is used to exchange heat with the steam and concentrated raw material liquid. Then, the heat energy is compressed by the heat pump 2 and the liquid water inside the water storage tank 3 is heated to meet the needs of production and life, thereby avoiding heat waste and reducing cost losses, thus conforming to the production concept of energy conservation and environmental protection.

[0035] Example 2:

[0036] Based on Example 1, please refer to the appendix of the instruction manual. Figure 2 and attached Figure 3The cleaning component 9 includes a sealing block 91 and a flushing pipe 92. The sealing block 91 is made of a material with good sealing performance, pressure resistance, wear resistance, and corrosion resistance. The flushing pipe 92 is connected to an external pure liquid water source, and its interior is connected to the interior of the condenser pipe 8. A flushing unit 93 is provided on the outside of the sealing block 91. The outer surface of the sealing block 91 is movably connected to the inner surface of the condenser pipe 8. A through circular groove 94 is opened inside the sealing block 91. The inner diameter of the circular groove 94 is adapted to the outer diameter of the spiral tube 7, and its inner surface is movably connected to the outer surface of the spiral tube 7. An electric push rod 95 is fixedly connected to the outer surface of the sealing block 91. The electric push rod 95 is electrically connected to an external control circuit, and its output end is connected to the condenser pipe 8. The condenser tube 8 has a through-hole movable connection inside. The outer surface of the electric push rod 95 is fixedly connected to the outer surface of the condenser tube 8. The outer surface of the sealing block 91 is provided with a guide groove 96. The side of the guide groove 96 away from the inner wall of the condenser tube 8 is provided with a slope. The inside of the guide groove 96 is connected to a one-way valve 97. The outer surface of the one-way valve 97 is fixedly connected to the inside of the sealing block 91. By setting up the cleaning component 9, the extension and retraction of the electric push rod 95 drives the sealing block 91 to move and clean the inside of the condenser tube 8, ensuring the cleanliness of the inside of the condenser tube 8. This avoids the accumulation of acidic condensate and water vapor inside the condenser tube 8, which would cause damage to the inside of the condenser tube 8 and thus avoid reducing the service life of the condenser tube 8 and the spiral tube 7.

[0037] Example 3:

[0038] Based on Example 2, please refer to the appendix of the instruction manual. Figure 4A sliding tube 921 is movably connected to the inner surface of the flushing pipe 92. The sliding tube 921 is made of a pressure-resistant and wear-resistant material. The outer surface of the sliding tube 921 is movably connected to the inner surface of the guide channel 96. One end of the sliding tube 921 is provided with an inclined surface 922, the outer surface of which is movably connected to the inner surface of the guide channel 96. The slope of the inclined surface 922 matches the slope of the guide channel 96. A filter plate 923 is movably connected to the outer surface of the sliding tube 921. The filter plate 923 serves as a support and limiter, and facilitates the flow of liquid water inside the flushing pipe 92. The outer surface of the filter plate 923 is fixedly connected to the inner surface of the flushing pipe 92. A through hole 924 is opened inside the sliding tube 921. A sealing post 925 is movably connected to the inner surface of the through hole 924. The outer diameter of the sealing post 925 matches the inner diameter of the through hole 924. Made of materials with good pressure resistance, corrosion resistance, wear resistance, and sealing performance, the outer surface of the sealing column 925 is fixedly connected to the outer surface of the filter plate 923. A telescopic rod 926 is fixedly connected to the outer surface of the filter plate 923. The telescopic rod 926 is made of existing tensile-resistant and fatigue-resistant spring rods, and its outer surface is treated with anti-corrosion. The output end of the telescopic rod 926 is movably connected to the interior of the filter plate 923. The output end of the telescopic rod 926 is fixedly connected to the outer surface of the slide tube 921. By setting up structures such as the slide tube 921, the slide tube 921 is connected to the guide groove 96 through the inclined surface 922, and with the elastic extension and contraction of the telescopic rod 926, so that the slide tube 921 can move according to the movement of the sealing block 91, thereby controlling the contact between the sealing column 925 and the through hole 924 to achieve automatic water supply and improve the ease of cleaning.

[0039] Example 4:

[0040] Based on Example 3, please refer to the appendix of the instruction manual. Figure 5The rinsing unit 93 includes a discharge pipe 931. One end of the discharge pipe 931 can be connected to an external waste liquid collection device or a recovery pump for recycling. One end of the discharge pipe 931 is connected to one end of the discharge pipe 10 via a flange. A solenoid valve 932 is installed on the outer surface of the discharge pipe 931 and is electrically connected to an external control circuit. An adjusting pipe 933 runs through the inside of the discharge pipe 931, allowing for volume adjustment to facilitate thorough cleaning of the condenser tube 8. A sealing plug 934 is movably connected to the inner surface of the adjusting pipe 933. The sealing plug 934 is made of a material with good sealing performance, pressure resistance, wear resistance, and corrosion resistance, and has an arc on one side that matches the inner wall of the discharge pipe 931. A lifting rod 935 is fixedly connected to the outer surface of the sealing plug 934. The lifting rod 935 is made of existing tensile-resistant and fatigue-resistant materials. Made of spring rod, one end of lifting rod 935 is fixedly connected to the inner surface of regulating pipe 933. Hydraulic rod 936 is fixedly connected to the inner surface of regulating pipe 933. Hydraulic rod 936 is connected to external control cylinder. Push plate 937 is fixedly connected to the output end of hydraulic rod 936. Push plate 937 can increase the support area to enhance the support effect. The outer surface of push plate 937 is movably connected to the outer surface of sealing plug 934. By setting flushing unit 93, the hydraulic rod 936 and push plate 937 drive the sealing plug 934 to move, which can control the connection between discharge pipe 931 and regulating pipe 933. At the same time, the cooperation between lifting rod 935 and sealing plug 934 can control the capacity of regulating pipe 933 to facilitate the movement of liquid water driven by sealing block 91. Thus, the internal cleaning of condenser tube 8 is achieved through flushing, which greatly delays the reduction of service life.

[0041] Example 5:

[0042] This invention also discloses a method for producing ferrous sulfate by high-temperature crystallization, specifically including the following features:

[0043] Refer to the attached diagram in the instruction manual. Figures 1-5 :

[0044] Step 1, Preheating and Recovery: First, the flash-evaporated ferrous sulfate raw material solution enters the temperature control tank 1. The cooling liquid then circulates externally within the spiral tube 7 and heat pump 2, absorbing heat through the temperature control tank 1. When the temperature of the ferrous sulfate raw material solution drops to the required value, it is transported from the temperature control tank 1 to the crystallization tank for further processing. As the cooling liquid inside the spiral tube 7 flows through the condenser tube 8, the steam generated during flash evaporation enters the condenser tube 8 through the inlet pipe 11 and is cooled by absorbing heat through contact with the spiral tube 7. The cooled exhaust gas and condensed waste liquid are discharged to the outside of the condenser pipe 8 through the discharge pipe 10. The cooling liquid carries the heat absorbed into the heat pump 2. The heat pump 2 absorbs and compresses the heat of the cooling liquid. At the same time, liquid water enters through the water pipe 5 at the bottom of the water storage tank 3. The liquid water circulates in the water storage tank 3 and inside the heat pump 2 through the circulation pipes 4 on both sides. After entering the heat pump 2, it is heated and discharged through the water pipe 5 at the top of the water storage tank 3. The heat energy is recovered and reused through industrial production, civil heating and other methods.

[0045] Step 2, Preliminary Cleaning: After production is completed, the output end of the electric push rod 95 extends, driving the sealing block 91 to descend inside the condenser tube 8. The sealing block 91 cleans the outer surface of the spiral tube 7 inside the condenser tube 8 and the inner wall of the condenser tube 8. At the same time, after the sealing block 91 descends, the guide groove 96 is released from the pressure on the inclined surface 922. The slide tube 921 is slid from inside the flushing pipe 92 to inside the condenser tube 8 under the elastic force of the telescopic rod 926. The sealing column 925 is released from the blockage of the through hole 924. The liquid water in the flushing pipe 92 flows into the condenser tube 8 through the through hole 924 and the slide tube 921, and through the action of the one-way valve 97, it flushes the lower part of the condenser tube 8.

[0046] Step 3, Flushing and Cleaning: After the sealing block 91 performs a simple cleaning of the inside of the condenser tube 8, the solenoid valve 932 on the discharge pipe 931 closes, and the output end of the hydraulic rod 936 retracts, causing the push plate 937 to disengage from the support of the sealing plug 934. As liquid water is added to the inside of the condenser tube 8 through the flushing pipe 92, the liquid level inside the condenser tube 8 rises. Subsequently, the electric push rod 95 drives the sealing block 91 to move repeatedly inside the condenser tube 8. Due to the pressure, the liquid water will push down the sealing plug 934 and enter the regulating pipe 933. Through the repeated movement of the liquid water, the inside of the condenser tube 8 can be flushed. After cleaning the inner wall of the condenser tube 8 discharge pipe 10 and the outer surface of the spiral tube 7, the electric push rod 95 drives the sealing block 91 to reset after cleaning. The slide tube 921 slides into the flushing pipe 92. The through hole 924 is blocked by the sealing column 925 and the water supply stops. At the same time, the solenoid valve 932 opens and the flushing liquid is discharged through the discharge pipe 931. At the same time, the output end of the hydraulic rod 936 extends and pushes the sealing plug 934 to reset through the push plate 937, so that the flushing liquid inside the regulating pipe 933 flows into the discharge pipe 931, so that the flushing liquid is completely discharged, thereby completing the cleaning of the inside of the condenser tube 8.

[0047] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature crystallization production apparatus for ferrous sulfate, comprising a temperature-regulating tank (1), characterized in that: The temperature regulating tank (1) is provided with an energy-saving mechanism, which includes a heat pump (2) and a water storage tank (3). The interior of the heat pump (2) and the interior of the water storage tank (3) are connected by two circulation pipes (4). Water pipes (5) are connected through both sides of the interior of the water storage tank (3). Connecting pipes (6) are connected through both sides of the interior of the heat pump (2). One end of the connecting pipe (6) is connected to a spiral pipe (7) through a flange. The spiral pipe (7) is sleeved on the outer surface of the temperature regulating tank (1). A condenser pipe (8) is fixedly connected through the outer surface of the spiral pipe (7). A cleaning component (9) is provided inside the condenser pipe (8). A discharge pipe (10) is connected through the interior of the condenser pipe (8). The outer surface of the spiral pipe (7) is fixedly connected through the interior of the discharge pipe (10). An air inlet pipe (11) is connected through the interior of the condenser pipe (8). The cleaning component (9) includes a sealing block (91), and a flushing unit (93) is provided on the outside of the sealing block (91). The flushing unit (93) includes a discharge pipe (931), and an regulating pipe (933) is connected through the inside of the discharge pipe (931). A sealing plug (934) is slidably provided on the inner surface of the regulating pipe (933). The sealing block (91) is used to clean the inner surface of the condenser (8) and the outer surface of the spiral pipe (7). The sealing plug (934) cooperates with the sealing block (91) to clean the discharge pipe (10).

2. The ferrous sulfate high-temperature crystallization production apparatus according to claim 1, characterized in that: The cleaning assembly (9) also includes a flushing pipe (92), the interior of which is connected to the interior of the condenser pipe (8), the outer surface of the sealing block (91) is movably connected to the inner surface of the condenser pipe (8), and a through circular groove (94) is provided inside the sealing block (91), the inner surface of which is movably connected to the outer surface of the spiral tube (7).

3. The ferrous sulfate high-temperature crystallization production apparatus according to claim 2, characterized in that: An electric push rod (95) is fixedly connected to the outer surface of the sealing block (91). The output end of the electric push rod (95) is movably connected to the interior of the condenser tube (8). The outer surface of the electric push rod (95) is fixedly connected to the outer surface of the condenser tube (8). A guide groove (96) is provided on the outer surface of the sealing block (91). A one-way valve (97) is connected to the interior of the guide groove (96). The outer surface of the one-way valve (97) is fixedly connected to the interior of the sealing block (91).

4. The ferrous sulfate high-temperature crystallization production apparatus according to claim 3, characterized in that: The inner surface of the flushing pipe (92) is movably connected to a slide pipe (921), the outer surface of the slide pipe (921) is movably connected to the inner surface of the guide groove (96), one end of the slide pipe (921) is provided with an inclined surface (922), the outer surface of the inclined surface (922) is movably connected to the inner surface of the guide groove (96), the outer surface of the slide pipe (921) is movably connected to a filter plate (923), and the outer surface of the filter plate (923) is fixedly connected to the inner surface of the flushing pipe (92).

5. The ferrous sulfate high-temperature crystallization production apparatus according to claim 4, characterized in that: The slide tube (921) has a through hole (924) inside. A sealing column (925) is movably connected to the inner surface of the through hole (924). The outer surface of the sealing column (925) is fixedly connected to the outer surface of the filter plate (923). A telescopic rod (926) is fixedly connected to the outer surface of the filter plate (923). The output end of the telescopic rod (926) is movably connected to the inside of the filter plate (923). The output end of the telescopic rod (926) is fixedly connected to the outer surface of the slide tube (921).

6. The ferrous sulfate high-temperature crystallization production apparatus according to claim 5, characterized in that: The flushing unit (93) includes a discharge pipe (931), one end of which is connected to one end of the discharge pipe (10) via a flange, and a solenoid valve (932) is provided on the outer surface of the discharge pipe (931).

7. The ferrous sulfate high-temperature crystallization production apparatus according to claim 6, characterized in that: A lifting rod (935) is fixedly connected to the outer surface of the sealing plug (934). One end of the lifting rod (935) is fixedly connected to the inner surface of the regulating pipe (933). A hydraulic rod (936) is fixedly connected to the inner surface of the regulating pipe (933). A push plate (937) is fixedly connected to the output end of the hydraulic rod (936). The outer surface of the push plate (937) is movably connected to the outer surface of the sealing plug (934).

8. A method for producing ferrous sulfate by high-temperature crystallization, using the ferrous sulfate high-temperature crystallization production apparatus described in claim 7, characterized in that, Specifically, it includes the following features: Step 1, Preheating and Recovery: First, the flash-evaporated ferrous sulfate raw material solution enters the temperature control tank (1). Subsequently, the cooling liquid circulates externally within the spiral tube (7) and the heat pump (2), and absorbs heat through the temperature control tank (1). When the temperature of the ferrous sulfate raw material solution drops to the required value, it is transported from the temperature control tank (1) to the crystallization tank for the next step of processing. When the cooling liquid inside the spiral tube (7) flows through the condenser (8), the steam generated by flash evaporation enters the condenser (8) through the inlet pipe (11) and interacts with the spiral tube. The pipe (7) is in contact with the heat absorbed and cooled. The cooled waste gas and condensed waste liquid are discharged to the outside of the condenser pipe (8) through the feed pipe (10). The cooling liquid carries the heat absorbed and enters the heat pump (2). The heat pump (2) absorbs and compresses the heat of the cooling liquid. At the same time, liquid water enters the water pipe (5) at the bottom of the water tank (3). The liquid water circulates in the water tank (3) and the heat pump (2) through the circulation pipes (4) on both sides. After entering the heat pump (2), it is heated and discharged through the water pipe (5) at the top of the water tank (3). Step 2, Preliminary cleaning: After production is completed, the output end of the electric push rod (95) extends, driving the sealing block (91) to descend inside the condenser tube (8). The sealing block (91) cleans the outer surface of the spiral tube (7) inside the condenser tube (8) and the inner wall of the condenser tube (8). At the same time, after the sealing block (91) descends, the guide groove (96) is released from the pressure on the inclined surface (922). The slide tube (921) is slid from the inside of the flushing pipe (92) to the inside of the condenser tube (8) under the elastic force of the telescopic rod (926). The sealing column (925) is released from the blockage of the through hole (924). The liquid water in the flushing pipe (92) flows into the inside of the condenser tube (8) through the through hole (924) and the slide tube (921), and is flushed at the lower part of the inside of the condenser tube (8) through the action of the one-way valve (97). Step 3, rinsing and cleaning: After the sealing block (91) performs a simple cleaning of the inside of the condenser tube (8), the solenoid valve (932) on the discharge pipe (931) is closed, and the output end of the hydraulic rod (936) retracts, causing the push plate (937) to disengage from the support of the sealing plug (934). As liquid water is added to the inside of the condenser tube (8) through the rinsing pipe (92), the liquid level inside the condenser tube (8) rises. Then, the electric push rod (95) drives the sealing block (91) to move repeatedly inside the condenser tube (8). Due to the pressure, the liquid water will press down on the sealing plug (934) and enter the regulating pipe (933). Through the repeated movement of the liquid water, the inside of the condenser tube (8) can be rinsed, and the inner wall of the discharge pipe (10) of the condenser tube (8) and the outer surface of the spiral tube (7) are cleaned.

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