Flange pickling tank wastewater recovery device

Abstract

The application belongs to the technical field of wastewater recovery, and discloses a flange pickling tank wastewater recovery device, which comprises a wastewater treatment tank and further comprises a storage assembly arranged on the wastewater treatment tank and used for storing lime solvent. The cleaning assembly reciprocates along the inside of the wastewater treatment tank, and the lime solvent is intermittently injected into the flange pickling wastewater through the injection assembly during the reciprocation. Under the action of the water flow, the valve plate is rotated, and the bottom end of the valve plate is abutted against the guide plate at one end, and the wastewater is discharged through the rectangular through groove to impact the bottom of the inside of the wastewater treatment tank. When the cleaning assembly moves reversely, the bottom end of the valve plate is abutted against the guide plate at the other end. During the reciprocation of the cleaning assembly, the impact force of the water flow is used to impact the bottom of the inside of the wastewater treatment tank, so that the lime deposition is avoided, and the neutralization reaction rate of the lime and the flange pickling wastewater and the utilization rate of the medicament are ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wastewater recovery, and particularly relates to a flange pickling tank wastewater recovery device. BACKGROUND

[0002] As a key process in the field of metal surface treatment, the core goal of flange pickling is to effectively remove the oxide scale, rust products, oil contaminants and residual debris impurities attached to the surface of the flange (including pipelines, valves and other connecting components) by means of chemical action, so as to provide a clean and active surface state for subsequent coating, welding assembly or direct use.

[0003] The recovery and treatment process of flange pickling wastewater mainly consists of pretreatment, heavy metal removal and advanced treatment stages; one of the core operations in the pretreatment stage is neutralization adjustment, which adjusts the pH value of the wastewater to the neutral range of 7-9 by accurately adding alkali agents (such as lime, sodium hydroxide or sodium carbonate, etc.); under this pH condition, the heavy metal ions in the wastewater combine with hydroxide ions to generate insoluble metal hydroxide precipitates which are preliminarily separated; however, in the widely used lime dry powder dosing system, in order to prevent the agglomeration and caking of lime dry powder due to moisture absorption during dosing, affecting the metering accuracy and uniformity of dosing, the lime dry powder is usually first prepared into lime milk (wet dosing); but it is found in practice that when the lime milk is added to the pickling wastewater, it is easy to cause the lime particles to precipitate prematurely due to local concentration being too high, uneven mixing or wastewater quality fluctuations, etc., without fully dissolving and participating in the reaction, which not only reduces the neutralization reaction efficiency and reagent utilization rate of lime and pickling wastewater, but also may increase the load and difficulty of subsequent solid-liquid separation. SUMMARY

[0004] To solve the problems raised in the background art, the application provides a flange pickling tank wastewater recovery device, which solves the problem that when the lime milk is added to the pickling wastewater, it is easy to form lime precipitate due to local concentration being too high, uneven mixing or wastewater quality fluctuations, etc.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: a flange pickling tank wastewater recovery device, comprising a wastewater treatment tank, further comprising:

[0006] A storage assembly is arranged on the wastewater treatment tank and used for storing lime solvent;

[0007] A cleaning assembly is connected to the storage assembly and located inside the wastewater treatment tank.

[0008] The injection assembly is arranged on the cleaning assembly and used for intermittent injection of lime solvent.

[0009] The cleaning assembly comprises a support plate, both ends of the support plate sliding along the inside of the wastewater treatment tank through limiting slide rods.

[0010] The bottom of the support plate is fixed with a fixing piece, both sides of the fixing piece are recessed arc-shaped, the fixing piece is connected with two guide plates through a butt joint plate, and a rectangular through slot is arranged at the top of the butt joint plate.

[0011] The distance between the two guide plates and the recessed arcs on both sides of the fixing piece gradually decreases from both sides to the middle, and the bottom of the fixing piece is hinged with a valve plate.

[0012] When the cleaning assembly moves to one end in the wastewater treatment tank, the wastewater pushes the valve plate to rotate and abut against the guide plate at one end between the guide plate and the fixing piece, and the wastewater impacts the bottom of the inner wall of the wastewater treatment tank through the rectangular through slot.

[0013] Preferably, the storage assembly comprises a tooth plate and a guide frame fixed to the top of the wastewater treatment tank, a fixing sleeve is fixed to the top of the support plate, a storage pipe is movably sleeved in the inside of the fixing sleeve, second butt joints are fixed to both ends of the storage pipe, the first butt joints are connected with the first butt joints through connecting shafts, and the first butt joints are connected with transmission gears meshing with the tooth plate.

[0014] Preferably, the transmission gears are driven to rotate along the tooth plate by a motor, the first butt joints slide along the guide frame, and the storage pipe rotates in the fixing sleeve.

[0015] Preferably, the storage pipe is provided with a communication pipe at both ends, an inlet through slot is arranged at the outside of the communication pipe, and a liquid injection pipe is movably sleeved at the outside of the communication pipe.

[0016] The liquid injection pipe, the inlet through slot and the communication pipe are used for injecting lime solvent into the storage pipe.

[0017] The top of the fixing sleeve is fixed with a first support frame for fixing the liquid injection pipe.

[0018] Preferably, the mixing assembly comprises a second support frame sliding on the support plate, mixing plates are equidistantly fixed on the second support frame, a rectangular through slot is arranged in the middle of the support plate, and the mixing plates are located in the rectangular through slot.

[0019] Preferably, butt shafts are fixed on both sides of the second support frame, a connecting piece is movably sleeved at the outside of the connecting shaft, and the bottom end of the connecting piece is sleeved at the outside of the butt shaft.

[0020] Preferably, the second connector is coaxial with the first connector, and the connecting shaft is eccentrically connected with the first connector and the second connector.

[0021] The transmission gear, the first connector and the connecting shaft rotate, and the connecting member pulls the mixing plate to reciprocate up and down.

[0022] Preferably, the injection assembly comprises a sleeve fixed to the bottom of the support plate, and a through hole is formed in the top of the sleeve and communicates with the sleeve.

[0023] A discharging channel is formed in the outside of the storage tube, and the discharging channel communicates with the through hole during the rotation of the storage tube, so that the lime solvent enters the sleeve.

[0024] Preferably, a piston ring is movably arranged in the inside of the sleeve, a one-way valve is arranged on the piston ring, and the bottom of the piston ring is installed on the mixing plate through a connecting rod.

[0025] Preferably, when the piston ring is located at the lower end of the sleeve, the discharging channel communicates with the sleeve through the through hole, when the piston ring moves upward, the one-way valve is in a closed state, and the discharging channel is continuously rotated to disengage from the through hole.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] In the present application, the cleaning assembly reciprocates along the inside of the wastewater treatment tank, and the lime solvent is intermittently injected into the flange pickling wastewater through the injection assembly during the movement. During the movement of the cleaning assembly in the wastewater treatment tank, the wastewater enters between the fixed member and the guide plate, and under the action of the water flow, the valve plate is rotated, and the bottom end thereof is abutted against the guide plate at one end. The wastewater is discharged through the rectangular channel to impact the bottom of the inside of the wastewater treatment tank. When the cleaning assembly moves reversely, the bottom end of the valve plate is abutted against the guide plate at the other end. In this process, the cleaning assembly reciprocates, and the impact force of the water flow is used to impact the bottom of the inside of the wastewater treatment tank, so that the lime precipitation is avoided, and the neutralization reaction rate of the lime and the flange pickling wastewater and the utilization rate of the medicament are ensured.

[0028] In the present application, the motor drives the transmission gear to rotate along the tooth plate, so that the storage tube rotates in the fixed sleeve. The injection liquid pipe can continuously inject the lime solvent into the storage tube, and the continuous rotation of the storage tube can avoid the phenomenon of lime solvent precipitation in the storage tube.

[0029] The application drives the mixing plate to reciprocate up and down along the support plate through the connecting piece, when the mixing plate is at the lower end of the support plate, the piston ring is at the lower end of the sleeve, the discharge channel is communicated with the sleeve through the through hole, the lime solvent enters the sleeve, when the mixing plate moves up, the storage tube rotates synchronously, the discharge channel is disconnected with the sleeve, the piston ring is pushed up by the connecting rod to extrude the lime solvent in the sleeve, the one-way valve is in the open state under pressure, the lime solvent is injected into the flange pickling wastewater, and the lime solvent and the flange pickling wastewater are fully mixed through the reciprocating movement of the mixing plate, so that the lime solvent is intermittently injected, and the cleaning assembly moves in the wastewater treatment tank, so that the lime solvent is uniformly injected into the wastewater treatment tank, and the reaction effect of the lime solvent and the flange pickling wastewater is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is an appearance structure schematic diagram of the application;

[0031] Figure 2 It is an internal structure schematic diagram of the wastewater treatment tank of the application;

[0032] Figure 3 It is a cross-section structure schematic diagram of the application;

[0033] Figure 4 It is an appearance structure schematic diagram of the storage assembly, the injection assembly, the mixing assembly and the cleaning assembly of the application;

[0034] Figure 5 It is a cooperation structure schematic diagram of the storage assembly and the mixing assembly of the application;

[0035] Figure 6 It is a disassembled structure schematic diagram of the cleaning assembly of the application;

[0036] Figure 7 It is a cooperation structure schematic diagram of the storage assembly and the injection assembly of the application;

[0037] Figure 8 It is an enlarged structure schematic diagram of A in the application; Figure 7

[0038] Figure 9 It is an enlarged structure schematic diagram of B in the application; Figure 7

[0039] Figure 10 It is a disassembled structure schematic diagram of the storage assembly of the application;

[0040] Figure 11 It is an appearance structure schematic diagram of the mixing assembly of the application.

[0041] ​​In the figure: 1, wastewater treatment tank; 2, storage assembly; 21, liquid injection pipe; 22, storage pipe; 23, discharge channel; 24, transmission gear; 25, first docking piece; 26, connecting shaft; 27, second docking piece; 28, feeding channel; 29, toothed plate; 20, guide frame; 3, material injection assembly; 31, connecting rod; 32, piston ring; 33, sleeve; 4, mixing assembly; 41, second support frame; 42, docking shaft; 43, mixing plate; 44, connecting piece; 5, cleaning assembly; 51, fixed sleeve; 52, support plate; 53, fixing piece; 54, guide plate; 55, docking plate; 56, rectangular channel; 57, valve plate; 58, first support frame. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] As shown in the figure, the present application provides a flange pickling tank wastewater recovery device, which comprises a wastewater treatment tank 1, and further comprises: Figures 1 to 11

[0044] a storage assembly 2, which is arranged on the wastewater treatment tank 1 and is used for storing lime solvent;

[0045] a cleaning assembly 5, which is connected to the storage assembly 2 and is located inside the wastewater treatment tank 1;

[0046] a material injection assembly 3, which is arranged on the cleaning assembly 5 and is used for intermittent injection of lime solvent;

[0047] The cleaning assembly 5 comprises a support plate 52, both ends of the support plate 52 are slid along the inside of the wastewater treatment tank 1 through limiting slide rods;

[0048] The bottom of the support plate 52 is fixed with a fixing piece 53, both sides of the fixing piece 53 are recessed in arc shape, the fixing piece 53 is connected with two guide plates 54 through a docking plate 55, and the top of the docking plate 55 is provided with a rectangular channel 56;

[0049] The distance between the two guide plates 54 and the recessed arc on both sides of the fixing piece 53 gradually decreases from both sides to the middle, and the bottom of the fixing piece 53 is hinged with a valve plate 57;

[0050] ​When the cleaning assembly 5 moves to one end in the wastewater treatment tank 1, the wastewater pushes the valve plate 57 to rotate against the guide plate 54 at one end, and the wastewater passes through the rectangular through slot 56 to hit the bottom of the inner wall of the wastewater treatment tank 1.

[0051] The flange pickling wastewater is injected into the wastewater treatment tank 1, and the lime solvent is stored in the storage assembly 2. The storage assembly 2 and the cleaning assembly 5 are driven by the driving motor to reciprocate along the inside of the wastewater treatment tank 1. During the movement, the lime solvent is intermittently injected into the flange pickling wastewater through the injection assembly 3. During the sliding of the support plate 52 in the wastewater treatment tank 1, the wastewater enters between the fixed part 53 and the guide plate 54. Since the distance between the guide plate 54 and the fixed part 53 gradually decreases from both sides to the middle, the flow rate of the wastewater is increased. Under the action of the water flow, the valve plate 57 is rotated, and the bottom end thereof is abutted against the guide plate 54 at one end. The wastewater is discharged through the rectangular through slot 56 to hit the bottom of the inside of the wastewater treatment tank 1. When the cleaning assembly 5 moves reversely, the bottom end of the valve plate 57 is abutted against the guide plate 54 at the other end. During the reciprocating movement of the cleaning assembly 5, the impact force of the water flow is used to hit the bottom of the inside of the wastewater treatment tank 1, so that the lime deposition is avoided, and the neutralization reaction rate of the lime and the flange pickling wastewater and the utilization rate of the medicament are ensured.

[0052] As shown in Figures 3-5 With Figure 10 the storage assembly 2 includes a toothed plate 29 fixed to the top of the wastewater treatment tank 1 and a guide frame 20. The top of the support plate 52 is fixed with a fixed sleeve 51. The inside of the fixed sleeve 51 movably sheaths a storage pipe 22. The two ends of the storage pipe 22 are fixed with second connecting parts 27. The second connecting parts 27 are connected with first connecting parts 25 through connecting shafts 26. The first connecting parts 25 are connected with transmission gears 24 engaged with the toothed plate 29;

[0053] The transmission gears 24 are driven to rotate along the toothed plate 29 by the motor. The first connecting parts 25 slide along the guide frame 20 and drive the storage pipe 22 to rotate in the fixed sleeve 51.

[0054] The two ends of the storage pipe 22 are provided with communication pipes. The outside of the communication pipes is provided with feeding through slots 28. The outside of the communication pipes movably sheaths injection pipes 21.

[0055] The lime solvent is injected into the storage pipe 22 through the injection pipes 21, the feeding through slots 28 and the communication pipes.

[0056] The top of the fixed sleeve 51 is fixed with a first support frame 58 for fixing the injection pipes 21.

[0057] The lime solvent is injected into the storage pipe 22 through the injection pipe 21, the feed channel 28 and the connecting pipe, the transmission gear 24 is driven by the motor to rotate along the tooth plate 29, and the storage pipe 22 is driven to rotate in the fixed sleeve pipe 51. Since the injection pipe 21 is fixed to the top of the fixed sleeve pipe 51 through the first support frame 58, the injection pipe 21 is always in a vertical state, the lime solvent can be continuously injected into the storage pipe 22 through the injection pipe 21, and the storage pipe 22 can avoid the phenomenon of lime solvent precipitation in the storage pipe 22 in the process of continuous rotation, so that the adding effect of the lime solvent is ensured.

[0058] As shown in Figure 7 - Figure 11 The mixing assembly 4 includes the second support frame 41 sliding on the support plate 52, the second support frame 41 is equidistantly fixed with the mixing plate 43, the middle part of the support plate 52 is provided with a rectangular through slot, and the mixing plate 43 is located in the rectangular through slot.

[0059] The two sides of the second support frame 41 are fixed with the connecting shaft 26, the outer part of the connecting shaft 26 is movably sleeved with the connecting piece 44, and the bottom end of the connecting piece 44 is sleeved with the outer part of the connecting shaft 42.

[0060] The second connecting piece 27 is coaxial with the first connecting piece 25, and the connecting shaft 26 is eccentrically connected with the first connecting piece 25 and the second connecting piece 27.

[0061] The transmission gear 24, the first connecting piece 25 and the connecting shaft 26 rotate, and the mixing plate 43 is pulled up and down reciprocatingly through the connecting piece 44.

[0062] The transmission gear 24, the first connecting piece 25 and the connecting shaft 26 are driven to rotate by the driving motor, and in this process, the cleaning assembly 5 moves in the wastewater treatment tank 1, pushes the flange pickling wastewater in the wastewater treatment tank 1 to flow, and the connecting shaft 26 rotates to drive the second support frame 41 and the mixing plate 43 to reciprocate up and down along the support plate 52 through the connecting piece 44, and the wastewater is stirred through the mixing plate 43.

[0063] As shown in Figure 7 - Figure 11 The injection assembly 3 includes the sleeve pipe 33 fixed to the bottom of the support plate 52, and the top of the sleeve pipe 33 is provided with a through hole in communication with the fixed sleeve pipe 51.

[0064] The outer part of the storage pipe 22 is provided with a discharge through slot 23, the discharge through slot 23 is in communication with the through hole in the process of rotation of the storage pipe 22, and the lime solvent enters the sleeve pipe 33.

[0065] The inner part of the sleeve pipe 33 is movably sleeved with the piston ring 32, the piston ring 32 is provided with a one-way valve, and the bottom of the piston ring 32 is installed on the mixing plate 43 through the connecting rod 31.

[0066] When the piston ring 32 is located at the lower end of the sleeve pipe 33, the discharge channel 23 is communicated with the sleeve pipe 33 through the through hole, and when the piston ring 32 moves upward, the one-way valve is in a closed state, and the discharge channel 23 is continuously rotated to be separated from the through hole.

[0067] The lime solvent is injected into the storage pipe 22, the storage pipe 22 is rotated in the fixed sleeve pipe 51 by a motor, the transmission gear 24 is rotated along the toothed plate 29, the cleaning assembly 5 and the mixing assembly 4 are driven to move in the wastewater treatment tank 1 to push the flange pickling wastewater, the connecting shaft 26 is rotated, the connecting piece 44 drives the counter connecting shaft 42, the second support frame 41 and the mixing plate 43 to reciprocate up and down along the support plate 52, and when the mixing plate 43 is located at the lower end of the support plate 52, the piston ring 32 is located at the lower end of the sleeve pipe 33, the discharge channel 23 is communicated with the sleeve pipe 33 through the through hole, and the lime solvent in the storage pipe 22 enters the sleeve pipe 33.

[0068] When the mixing plate 43 moves upward, the storage pipe 22 rotates synchronously, the discharge channel 23 is disconnected from the sleeve pipe 33, the piston ring 32 is pushed upward by the connecting rod 31 to extrude the lime solvent in the sleeve pipe 33, the one-way valve is in an open state under pressure, the lime solvent is injected into the flange pickling wastewater, and the lime solvent and the flange pickling water are fully mixed by the reciprocating movement of the mixing plate 43, so that the lime solvent is intermittently injected, and the cleaning assembly 5 moves in the wastewater treatment tank 1, so that the lime solvent is uniformly injected into the wastewater treatment tank 1, and the reaction effect of the lime solvent and the flange pickling water is improved.

[0069] The working principle and use process of the present application are as follows:

[0070] The lime solvent is injected into the storage pipe 22 through the liquid injection pipe 21, the feeding channel 28 and the communication pipe, the storage pipe 22 is rotated in the fixed sleeve pipe 51 by a motor, the transmission gear 24 is rotated along the toothed plate 29, the cleaning assembly 5 and the mixing assembly 4 are driven to move in the wastewater treatment tank 1 to push the flange pickling wastewater, the connecting shaft 26 is rotated, the connecting piece 44 drives the counter connecting shaft 42, the second support frame 41 and the mixing plate 43 to reciprocate up and down along the support plate 52, and when the mixing plate 43 is located at the lower end of the support plate 52, the piston ring 32 is located at the lower end of the sleeve pipe 33, the discharge channel 23 is communicated with the sleeve pipe 33 through the through hole, and the lime solvent in the storage pipe 22 enters the sleeve pipe 33.

[0071] When the mixing plate 43 moves up, the storage tube 22 rotates synchronously, the discharge channel 23 is disconnected with the sleeve 33, the piston ring 32 is pushed up by the connecting rod 31 to extrude the lime solvent in the sleeve 33, the one-way valve is in the open state under the pressure, the lime solvent is injected into the flange pickling wastewater, and then the lime solvent is fully mixed with the flange pickling wastewater through the up-down reciprocating movement of the mixing plate 43, so that the lime solvent is intermittently injected, and the lime solvent is uniformly injected into the wastewater treatment tank 1 along with the movement of the cleaning assembly 5 in the wastewater treatment tank 1, thereby improving the reaction effect of the lime solvent and the flange pickling wastewater.

[0072] Meanwhile, the storage tube 22 rotates in the fixed sleeve 51, the liquid injection tube 21 is fixed to the top of the fixed sleeve 51 through the first support frame 58, so that the liquid injection tube 21 is always in a vertical state, the lime solvent can be continuously injected into the storage tube 22 through the liquid injection tube 21, and the deposition of the lime solvent in the storage tube 22 can be avoided during the continuous rotation of the storage tube 22;

[0073] When the support plate 52 slides in the wastewater treatment tank 1 through the limiting slide rod, the wastewater enters between the fixed part 53 and the guide plate 54, the distance between the guide plate 54 and the fixed part 53 gradually decreases from both sides to the middle, so that the flow rate of the wastewater is improved, the valve plate 57 is rotated under the action of the water flow, and the bottom end of the valve plate 57 is abutted on the guide plate 54 at one end, and the wastewater is discharged through the rectangular through slot 56 to impact the bottom of the wastewater treatment tank 1, the bottom end of the valve plate 57 is abutted on the guide plate 54 at the other end during the reverse movement of the cleaning assembly 5, the bottom of the wastewater treatment tank 1 is impacted by the impact force of the water flow through the reciprocating movement of the cleaning assembly 5 in the process, the formation of lime deposition is avoided, the neutralization reaction rate of the lime and the flange pickling wastewater and the utilization rate of the reagent are ensured, and the wastewater after the reaction is further treated and recovered.

[0074] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0075] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A flange pickling tank wastewater recovery device comprising a wastewater treatment tank (1), characterized in that, Also include: The storage assembly (2) is arranged on the wastewater treatment tank (1), which is used for storing lime solvent; The cleaning assembly (5) is connected to the storage assembly (2), and the cleaning assembly (5) is located inside the wastewater treatment tank (1); The injection assembly (3) is arranged on the cleaning assembly (5) for intermittent injection of lime solvent; The cleaning assembly (5) includes a support plate (52), both ends of the support plate (52) are slid along the inside of the wastewater treatment tank (1) through the limiting slide rod; The bottom of the support plate (52) is fixed with a fixing piece (53), the two sides of the fixing piece (53) are concave arc, the fixing piece (53) is connected with two guide plates (54) through the butt joint plate (55), and the top of the butt joint plate (55) is provided with a rectangular through slot (56); The distance between the two guide plates (54) and the concave arc on both sides of the fixing piece (53) gradually decreases from both sides to the middle, and the bottom of the fixing piece (53) is hinged with a valve plate (57); When the cleaning assembly (5) moves to one end in the wastewater treatment tank (1), the wastewater enters the space between the guide plate (54) and the fixing piece (53) to push the valve plate (57) to rotate and abut on the guide plate (54) at one end, and the wastewater passes through the rectangular through slot (56) to impact the bottom of the inner wall of the wastewater treatment tank (1).

2. The flange pickling tank wastewater recovery apparatus according to claim 1, characterized by: The storage assembly (2) includes a tooth plate (29) and a guide frame (20) fixed to the top of the wastewater treatment tank (1), the top of the support plate (52) is fixed with a fixed sleeve (51), the inside of the fixed sleeve (51) movably sheaths a storage pipe (22), both ends of the storage pipe (22) are fixed with a second connecting piece (27), the second connecting piece (27) is connected with a first connecting piece (25) through a connecting shaft (26), and the side of the first connecting piece (25) is connected with a transmission gear (24) engaged with the tooth plate (29).

3. The flange pickling tank wastewater recovery apparatus of claim 2, wherein: The transmission gear (24) is driven to rotate along the tooth plate (29) by the motor, the first connecting piece (25) slides along the guide frame (20), and the storage pipe (22) rotates in the fixed sleeve (51).

4. The flange pickling tank wastewater recovery apparatus of claim 3, wherein: Both ends of the storage pipe (22) are provided with a communication pipe, the outside of the communication pipe is provided with an inlet channel (28), and the outside of the communication pipe movably sheaths an injection pipe (21); The injection pipe (21), the inlet channel (28) and the communication pipe are used for injecting lime solvent into the storage pipe (22); The top of the fixed sleeve (51) is fixed with a first support frame (58) for fixing the injection pipe (21).

5. The flange pickling tank wastewater recovery apparatus of claim 2, wherein: The mixing assembly (4) includes a second support frame (41) sliding on the support plate (52), a mixing plate (43) is fixed on the second support frame (41) at equal intervals, and a rectangular through slot is formed in the middle of the support plate (52). The mixing plate (43) is located in the rectangular through slot.

6. The flange pickling tank wastewater recovery apparatus of claim 5, wherein: The second support frame (41) is provided with a connecting shaft (42) on both sides, and the connecting shaft (26) is externally movably sleeved with a connecting piece (44), and the bottom end of the connecting piece (44) is sleeved with the connecting shaft (42) externally.

7. The flange pickling tank wastewater recovery apparatus of claim 6, wherein: The second connecting piece (27) is coaxial with the first connecting piece (25), and the connecting shaft (26) is eccentrically connected with the first connecting piece (25) and the second connecting piece (27). The transmission gear (24), the first connecting piece (25) and the connecting shaft (26) rotate, and the connecting piece (44) pulls the mixing plate (43) to reciprocate up and down.

8. The flange pickling tank wastewater recovery apparatus of claim 5, wherein: The injection assembly (3) comprises a sleeve (33) fixedly arranged at the bottom of the support plate (52), and a through hole is formed in the top of the sleeve (33) and is in communication with the fixed sleeve (51). The outer portion of the storage pipe (22) is provided with a discharging channel (23), and the discharging channel (23) is in communication with the through hole during the rotation of the storage pipe (22), and the lime solvent enters the sleeve (33).

9. The flange pickling tank wastewater recovery apparatus of claim 8, wherein: The inner portion of the sleeve (33) is movably sleeved with a piston ring (32), the piston ring (32) is provided with a one-way valve, and the bottom of the piston ring (32) is installed on the mixing plate (43) through a connecting rod (31).

10. The flange pickling tank wastewater recovery apparatus of claim 9, wherein: When the piston ring (32) is located at the lower end of the sleeve (33), the discharging channel (23) is in communication with the sleeve (33) through the through hole, the one-way valve is in a closed state when the piston ring (32) moves upward, and the discharging channel (23) is continuously rotated to be separated from the through hole.

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