Desulfurization tailing filtrate recovery device for flue gas desulfurization

Abstract

The utility model provides a desulfurization tailing filtrate recovery device for flue gas desulfurization, and relates to the field of flue gas desulfurization. The desulfurization tailing filtrate recovery device for flue gas desulfurization comprises a treatment tank and a filtering tank, the treatment tank is fixedly connected with a liquid conveying pipe, the treatment tank and the filtering tank are communicated through a connecting pipe, the top of the treatment tank is fixedly connected with a dosing cylinder communicated with the treatment tank, and the top of the dosing cylinder is fixedly connected with a liquid conveying pipe. And a blocking plug for blocking the bottom of the dosing cylinder is mounted at one end of the dosing cylinder. Through reciprocating lifting of a connecting rod, a medicament in a medicament adding cylinder indirectly falls into a treatment tank, the medicament and a solution are mixed and stirred through a stirring mechanism, and the mixing effect and efficiency of the medicament and the solution are improved by adopting an indirect medicament adding and stirring mode; then the mixed solution is discharged into the filtering tank through the connecting pipe, and particle impurities in the solution are conveniently filtered through the filtering net.

Description

Technical Field

[0001] The utility model relates to a desulfurization filtrate recovery device, in particular to a desulfurization tailings filtrate recovery device used for flue gas desulfurization, belonging to the technical field of flue gas desulfurization. Background Art

[0002] The flotation desulfurization of high-sulfur bauxite was previously coordinated with the alumina system. The sulfur concentrate was directly discharged with the red mud without filtering and then stored after being squeezed dry. After testing, the sulfate content in the sulfur concentrate slurry was 9.25g / L, the unsaturated sulfur was 0.051g / L, and the carbon alkali content was 2g / L. After this part of the slurry was squeezed and filtered, the filter cake moisture content was 32%, and most of the water returned to the alumina system. However, the carbon alkali and unsaturated sulfur in the solution will cause the quality of the alumina product to decline. At the same time, the dissolution equipment will not pass the material smoothly, which will increase the desulfurization and decarbonization costs of the alumina system.

[0003] Chinese patent announcement number CN219072157U discloses a wastewater desulfurization precipitation recovery device, which relates to the technical field of recovery devices, including a tank body, a discharge hopper is installed at the bottom of the tank body, the surface of the tank body is respectively connected to an inlet pipe and an outlet pipe, the bottom of the discharge hopper is connected to a discharge pipe, a motor is fixedly installed on the surface of the tank body, a screw rod is installed at the output end of the motor, the screw rod is rotatably connected to the tank body, a connecting block is slidably connected inside the tank body, and a screw barrel is sleeved on the surface of the screw rod.

[0004] However, the inventor of the above device believes that there are certain defects. The mixing effect of the wastewater poured into the pool body by the above device and the reagent is general, and the wastewater cannot be fully stirred and mixed when the reagent is treated, resulting in the wastewater treatment failing to meet the recycling standards. For this reason, the utility model provides a desulfurization tailings filtrate recovery device for flue gas desulfurization. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The purpose of the utility model is to provide a desulfurization tailings filtrate recovery device for flue gas desulfurization in order to solve the above problems, so as to solve the problem in the prior art that the mixing effect of wastewater and reagents generally affects wastewater recovery.

[0007] (II) Technical solution

[0008] The utility model is implemented through the following technical scheme: a desulfurization tailings filtrate recovery device for flue gas desulfurization, comprising a processing tank and a filtering tank, the processing tank is fixedly connected with an infusion tube, the processing tank and the filtering tank are connected by a connecting pipe, the top of the processing tank is fixedly connected with a dosing cartridge connected with the processing tank, one end of the dosing cartridge is equipped with a stopper for sealing the bottom of the dosing cartridge, the bottom of the stopper is fixedly connected with a connecting rod, the interior of the processing tank is provided with a lifting mechanism for controlling the reciprocating lifting and sliding of the connecting rod, the interior of the processing tank is provided with a stirring mechanism for stirring water and reagents, the stirring mechanism includes a stirring rod rotating inside the processing tank, the interior of the filtering tank is provided with a filtering mechanism for filtering the solution, the filtering mechanism includes an annular frame installed inside the filtering tank, a filter screen is inlaid on the annular frame, and one end of the connecting pipe is arranged below the filter screen.

[0009] Preferably, the lifting mechanism includes a U-shaped driving rod rotating inside the processing tank, a sleeve is sleeved on the U-shaped driving rod, a pull rod is fixedly connected to the sleeve, the other end of the pull rod is hinged to the bottom of the connecting rod through a pin shaft, and the U-shaped driving rod is driven to rotate and the pull rod is pushed up by the U-shaped end of the U-shaped driving rod, and the connecting rod is driven to perform reciprocating lifting and sliding under the connecting action of the pull rod.

[0010] Preferably, the inner top wall of the processing tank is fixedly connected to a connecting box, one end of the U-shaped driving rotating rod and the stirring rod are both rotatably connected to the inside of the connecting box, the stirring rod is fixedly connected to a first bevel gear, and one end of the U-shaped driving rotating rod is fixedly connected to a second bevel gear, the first bevel gear and the second bevel gear are meshed with each other, and under the action of the first bevel gear and the second bevel gear, the U-shaped driving rotating rod is driven to rotate together during the rotation of the stirring rod.

[0011] Preferably, a driving motor for driving a stirring rod to rotate is fixedly connected to the top of the treatment tank, and a plurality of stirring blades are fixedly connected to the stirring rod. The driving motor is started to drive the stirring rod to rotate, and the medicine and solution inside the treatment tank are mixed and stirred by the stirring blades.

[0012] Preferably, a slag discharge port is fixedly connected to the bottom of the processing tank, and a blocking cover is detachably connected to the bottom of the slag discharge port, so that impurities precipitated in the processing tank can be discharged by opening the blocking cover at the bottom of the slag discharge port.

[0013] Preferably, the top of the filter tank is detachably connected to a connecting top cover, the bottom of the connecting top cover is fixedly connected to a first connecting frame, the other end of the first connecting frame is fixedly connected to the annular frame, and by removing the bolts on the connecting top cover, the annular frame is pulled out from the interior of the filter tank under the connecting action of the first connecting frame.

[0014] Preferably, the bottom of the annular frame is fixedly connected to a second connecting frame, and the bottom of the second connecting frame is fixedly connected to a receiving tray, and the impurities falling into the bottom wall of the filter tank are collected by the receiving tray. Under the action of the second connecting frame, the annular frame is pulled out from the inside of the filter tank and the receiving tray is driven up together.

[0015] Preferably, a drain pipe is fixedly connected to the filter tank, one end of which is arranged above the annular frame, and the filtered solution is discharged from the interior of the filter tank through the drain pipe.

[0016] The utility model provides a desulfurization tailings filtrate recovery device for flue gas desulfurization, which has the following beneficial effects:

[0017] 1. The device fills the solution to be treated into the interior of the treatment tank through an infusion tube, and drives the connecting rod to reciprocate and lift at the bottom of the dosing cylinder by driving the lifting mechanism. When the stopper rises, the discharge port at the bottom of the dosing cylinder is opened, and when the stopper falls, the discharge port of the dosing cylinder is closed. Therefore, through the reciprocating lifting of the connecting rod, the medicine inside the dosing cylinder indirectly falls into the interior of the treatment tank, and the medicine and the solution are mixed and stirred by the stirring mechanism. The indirect dosing and stirring method is used to improve the mixing effect and efficiency of the medicine and the solution. Finally, the mixed solution is discharged into the interior of the filter tank through the connecting pipe, and the particulate impurities in the solution are filtered through the filter net.

[0018] 2. The device opens the top of the filter tank by removing the bolts on the connecting top cover, and takes out the annular frame and the receiving tray under the connection of the first connecting frame and the second connecting frame, so as to facilitate the cleaning and maintenance of the filter screen, and drives the stirring rod to rotate by starting the driving motor, and drives the U-shaped driving rotating rod to rotate under the action of the first bevel gear and the second bevel gear, and drives the connecting rod to reciprocate and rise and fall under the action of the set sleeve, pull rod and U-shaped driving rotating rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0020] Figure 2 This is a cross-sectional view of the filter tank of the utility model;

[0021] Figure 3 For the utility model Figure 2 The enlarged schematic diagram at A in the middle;

[0022] Figure 4 This is a schematic diagram of the connection box structure of the utility model;

[0023] Figure 5 This is a cross-sectional view of the filter tank structure of the utility model;

[0024] Figure 6 This is a flow chart of desulfurization tailings filtrate recovery for flue gas desulfurization of the utility model.

[0025]

Main component symbol description

[0026] 1. Processing tank; 11. Infusion tube; 12. Slag discharge port; 2. Filter tank; 21. Connecting top cover; 3. Connecting pipe; 4. Dosing cartridge; 41. Stop plug; 42. Connecting rod; 5. Stirring rod; 51. Stirring blade; 6. U-shaped driving rotating rod; 61. Casing; 62. Pull rod; 7. Connecting box; 71. Driving motor; 8. Ring frame; 81. Filter screen; 82. First connecting frame; 83. Second connecting frame; 84. Receiving tray; 9. Drain pipe. DETAILED DESCRIPTION

[0027] The utility model embodiment provides a desulfurization tailings filtrate recovery device for flue gas desulfurization.

[0028] Embodiment 1:

[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The desulfurization tailings filtrate recovery device for flue gas desulfurization comprises a treatment tank 1 and a filter tank 2. The treatment tank 1 is fixedly connected with a liquid infusion pipe 11, and a solution to be treated is injected into the treatment tank 1 through the liquid infusion pipe 11. The treatment tank 1 and the filter tank 2 are connected through a connecting pipe 3. After the solution is treated, the valve on the connecting pipe 3 is opened to allow the solution in the treatment tank 1 to flow into the filter tank 2. The bottom of the treatment tank 1 is in a truncated cone shape to collect the precipitate in the solution. The top of the treatment tank 1 is fixedly connected with a valve connected to the treatment tank 1. The dosing cartridge 4 is connected, and a plug 41 for sealing the bottom of the dosing cartridge 4 is installed at one end of the dosing cartridge 4. A connecting rod 42 is fixedly connected to the bottom of the plug 41. The medicine is stored through the dosing cartridge 4. When the plug 41 rises, the discharge port at the bottom of the dosing cartridge 4 is opened. When the plug 41 descends, the discharge port of the dosing cartridge 4 is closed. A slag discharge port 12 is fixedly connected to the bottom of the treatment tank 1. A blocking cover is detachably connected to the bottom of the slag discharge port 12. The sediment on the bottom wall of the treatment tank 1 can be discharged by opening the blocking cover at the bottom of the slag discharge port 12.

[0030] Please refer again Figure 1 , Figure 2 , Figure 3 and Figure 4A lifting mechanism for controlling the reciprocating lifting and sliding of the connecting rod 42 is provided inside the processing tank 1. The lifting mechanism includes a U-shaped driving rotating rod 6 rotating inside the processing tank 1. A sleeve 61 is sleeved on the U-shaped driving rotating rod 6. A pull rod 62 is fixedly connected to the sleeve 61. The other end of the pull rod 62 is hinged to the bottom of the connecting rod 42 through a pin shaft. A U-shaped protrusion is provided on the U-shaped driving rotating rod 6. By driving the U-shaped driving rotating rod 6 to rotate, the connecting rod 42 is driven to reciprocate and lift under the connection action of the pull rod 62.

[0031] Embodiment 2:

[0032] Please refer again Figure 1 , Figure 2 , Figure 3 and Figure 4 A stirring mechanism for stirring water and medicine is provided inside the treatment tank 1, and the stirring mechanism includes a stirring rod 5 rotating inside the treatment tank 1, and a driving motor 71 for driving the stirring rod 5 to rotate is fixedly connected to the top of the treatment tank 1, and a plurality of stirring blades 51 are fixedly connected to the stirring rod 5. The stirring rod 5 is driven to rotate by starting the driving motor 71, and the medicine and the solution are mixed and stirred by the stirring blades 51.

[0033] Please refer again Figure 1 , Figure 2 and Figure 4 The inner top wall of the processing tank 1 is fixedly connected with a connecting box 7, one end of the U-shaped driving rotating rod 6 and the stirring rod 5 are both rotatably connected to the inside of the connecting box 7, the stirring rod 5 is fixedly connected with a first bevel gear, and one end of the U-shaped driving rotating rod 6 is fixedly connected with a second bevel gear, the first bevel gear and the second bevel gear are meshed, and the stirring rod 5 is driven to rotate by starting the driving motor 71, and the U-shaped driving rotating rod 6 is driven to rotate together under the action of the first bevel gear and the second bevel gear.

[0034] Please refer again Figure 1 and Figure 5The interior of the filter tank 2 is provided with a filtering mechanism for filtering the solution, the filtering mechanism includes an annular frame 8 installed inside the filter tank 2, a filter screen 81 is inlaid on the annular frame 8, one end of the connecting pipe 3 is arranged below the filter screen 81, and the mixed solution is discharged into the interior of the filter tank 2 through the connecting pipe 3. Since the height value of the treatment tank 1 is higher than the height value of the filter tank 2, the liquid level of the solution flowing into the filter tank 2 will gradually rise, and the particle impurities in the solution are filtered through the filter screen 81. The top of the filter tank 2 is detachably connected to the connecting top cover 21, and the bottom of the connecting top cover 21 is fixedly connected to a first connecting frame 82, the other end of the first connecting frame 82 is fixedly connected to the annular frame 8, and the bottom of the annular frame 8 is fixedly connected to a second connecting frame 83. A collecting tray 84 is fixedly connected to the bottom of the second connecting frame 83. The annular frame 8 and the collecting tray 84 are taken out by removing the bolts connecting the top of the top cover 21 and under the connection of the first connecting frame 82 and the second connecting frame 83, so as to facilitate the cleaning and maintenance of the filter screen 81. The collecting tray 84 is set to prevent impurities filtered at the bottom of the filter screen 81 from falling into the inner bottom wall of the filter tank 2. A drain pipe 9 is fixedly connected to the filter tank 2, and one end of the drain pipe 9 is arranged above the annular frame 8. The filtered solution is discharged through the drain pipe 9. The drive motor 71 is connected to the municipal power supply, and electric valves are installed on the infusion pipe 11, the connecting pipe 3 and the drain pipe 9 to control the flow of each pipeline. A sealing ring is installed on the outer surface of the annular frame 8.

[0035] It should be noted that see Figure 6 As shown in the figure, the high-sulfur bauxite tailings are pumped to the sedimentation tank by the slurry pump, settled in the sedimentation tank, and the bottom flow of the sedimentation tank is pumped to the filter press to be pressed and dried by the low-flow pump. The filter cake is temporarily stored in the concentrate storage, and then transported to the red mud storage by steam. The filtrate and the overflow of the sedimentation tank enter the new circulating water pool to separate the concentrate water system and the tailings water system. The tailings water system contains sulfur, carbon, sulfate ions, etc. The tailings water is pumped to the boiler. After the boiler is configured with fine stone powder, it is sprayed in the desulfurization tower for boiler flue gas desulfurization. The boiler originally used new water to configure fine stone powder for desulfurization. Through this transformation, the use of new water is reduced. After using this part of the desulfurized tailings filtrate water to configure fine stone powder for desulfurization, the solid reactants are filtered by the belt filter and sent to the red mud storage for storage. The filtrate of the belt filter is reconfigured with fine stone powder for desulfurization. Through this process, the use of new water is reduced, and this part of water does not return to the Bayer alumina system, which improves the stability of product quality.

[0036] The flotation desulfurization of high-sulfur bauxite was previously coordinated with the alumina system. The sulfur concentrate was not filtered out directly with the red mud and was stored after being squeezed dry. After testing, the sulfate content in the sulfur concentrate slurry was 9.25g / L, the unsaturated sulfur was 0.051g / L, and the carbon alkali content was 2g / L. After this part of the slurry was squeezed and filtered, the filter cake moisture content was 32%, and most of the water returned to the alumina system. The carbon alkali and unsaturated sulfur will cause the quality of the alumina product to decline. At the same time, the dissolution equipment will not pass smoothly, which will increase the desulfurization and decarbonization costs of the alumina system. After water quality analysis, the sulfur concentrate slurry can be directly squeezed dry in the mineral processing process to achieve a moisture content of 14%, which can reduce the occupancy of the red mud storage area. At the same time, through experiments, this part of the water can be used for the configuration of the boiler wet desulfurization slurry without affecting the desulfurization effect. The system process was modified. After the modification, this part of the filtrate water goes to the boiler wet desulfurization, reducing the use of new water and reducing the impact on the alumina system. Figure 6 Only the overall workflow is disclosed, which is not the content of this application and is provided here for ease of understanding and review.

[0037] Working principle: the solution to be recycled is input into the interior of the treatment tank 1 through the infusion tube 11, and the treatment agent is put into the interior of the dosing cylinder 4. The driving motor 71 is started to drive the stirring rod 5 to rotate, and the U-shaped driving rotating rod 6 is driven to rotate together under the action of the first bevel gear and the second bevel gear. The connecting rod 42 is driven to reciprocate and rise and fall under the connection action of the pull rod 62. When the stopper 41 rises, the discharge port at the bottom of the dosing cylinder 4 is opened, and when the stopper 41 descends, the discharge port of the dosing cylinder 4 is closed, so that through the reciprocating rise and fall of the connecting rod 42, the agent inside the dosing cylinder 4 indirectly falls into the interior of the treatment tank 1, and is mixed and stirred by the stirring blades 51. After the mixing is completed, the solution is allowed to settle statically, and then the valve on the connecting pipe 3 is opened to allow the treated solution to flow to the interior of the filter tank 2. Since the height value of the treatment tank 1 is higher than the height value of the filter tank 2, the liquid level of the solution flowing into the filter tank 2 will gradually rise, and the particulate impurities in the solution are filtered through the filter net 81, and finally discharged through the discharge pipe 9 for recovery.

[0038] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A desulfurization tailings filtrate recovery device for flue gas desulfurization, comprising a treatment tank (1) and a filter tank (2), characterized in that: The treatment tank (1) is fixedly connected to an infusion tube (11), the treatment tank (1) and the filter tank (2) are connected via a connecting tube (3), the top of the treatment tank (1) is fixedly connected to a dosing cartridge (4) connected to the treatment tank (1), one end of the dosing cartridge (4) is provided with a stopper (41) for blocking the bottom of the dosing cartridge (4), the bottom of the stopper (41) is fixedly connected to a connecting rod (42), the interior of the treatment tank (1) is provided with a lifting mechanism for controlling the reciprocating lifting and sliding of the connecting rod (42), the interior of the treatment tank (1) is provided with a stirring mechanism for stirring water and medicine, the stirring mechanism comprises a stirring rod (5) rotating inside the treatment tank (1), the interior of the filter tank (2) is provided with a filtering mechanism for filtering the solution, the filtering mechanism comprises an annular frame (8) installed inside the filter tank (2), the annular frame (8) is inlaid with a filtering net (81), and one end of the connecting tube (3) is arranged below the filtering net (81).

2. The desulfurization tailings filtrate recovery device for flue gas desulfurization according to claim 1 is characterized in that: The lifting mechanism comprises a U-shaped driving rod (6) rotating inside the processing tank (1), a sleeve (61) is sleeved on the U-shaped driving rod (6), a pull rod (62) is fixedly connected to the sleeve (61), and the other end of the pull rod (62) is hinged to the bottom of the connecting rod (42) through a pin shaft.

3. The desulfurization tailings filtrate recovery device for flue gas desulfurization according to claim 2 is characterized in that: The inner top wall of the processing tank (1) is fixedly connected to a connection box (7); one end of the U-shaped driving rotating rod (6) and the stirring rod (5) are both rotatably connected to the inside of the connection box (7); a first bevel gear is fixedly connected to the stirring rod (5); one end of the U-shaped driving rotating rod (6) is fixedly connected to a second bevel gear; the first bevel gear and the second bevel gear are meshed.

4. The desulfurization tailings filtrate recovery device for flue gas desulfurization according to claim 1, characterized in that: A driving motor (71) for driving a stirring rod (5) to rotate is fixedly connected to the top of the processing tank (1), and a plurality of groups of stirring blades (51) are fixedly connected to the stirring rod (5).

5. The desulfurization tailings filtrate recovery device for flue gas desulfurization according to claim 1 is characterized in that: The bottom of the processing tank (1) is fixedly connected to a slag discharge port (12), and the bottom of the slag discharge port (12) is detachably connected to a blocking cover.

6. The desulfurization tailings filtrate recovery device for flue gas desulfurization according to claim 1 is characterized in that: The top of the filter tank (2) is detachably connected to a connecting top cover (21), the bottom of the connecting top cover (21) is fixedly connected to a first connecting frame (82), and the other end of the first connecting frame (82) is fixedly connected to the annular frame (8).

7. The desulfurization tailings filtrate recovery device for flue gas desulfurization according to claim 1 is characterized in that: The bottom of the annular frame (8) is fixedly connected to a second connecting frame (83), and the bottom of the second connecting frame (83) is fixedly connected to a material receiving tray (84).

8. The desulfurization tailings filtrate recovery device for flue gas desulfurization according to claim 1 is characterized in that: A liquid discharge pipe (9) is fixedly connected to the filter tank (2), and one end of the liquid discharge pipe (9) is arranged above the annular frame (8).

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