Immobilized bed antimony and arsenic wastewater treatment system

Abstract

The invention relates to the technical field of antimony and arsenic wastewater treatment, and particularly discloses an immobilized bed antimony and arsenic wastewater treatment system. The antimony and arsenic wastewater treatment system for the immobilized bed comprises a primary regulating tank, a fixed bed, a secondary regulating tank and a filter tank which are communicated in sequence. The fixed bed comprises a first shell, and a plurality of charging barrels, a flow pushing barrel and a flow pushing device which are arranged in the first shell. And the charging barrel is filled with an adsorption material. Fine nets are installed at upper and lower end openings of the charging barrel. The upper and lower ends of the plug-flow cylinder are open. And the flow pushing device is arranged in the flow pushing cylinder. The charging barrels are seamlessly attached to each other and seamlessly surround the plug flow barrel, and the combination of the multiple charging barrels and the plug flow barrel is seamlessly attached to the inner circumferential wall of the first shell. Wastewater penetrates through the charging barrels and flows to the bottom of the first shell, then the water impeller pumps the wastewater at the bottom to the position above the multiple charging barrels to be adsorbed again, and after the operation is repeated for multiple times, antimony and arsenic in the wastewater are fully adsorbed, and the concentration of antimony and arsenic remaining in the wastewater can be reduced to be lower than the discharge standard.

Description

Technical Field

[0001] The present application relates to the technical field of antimony and arsenic wastewater treatment, and in particular to a fixed-bed antimony and arsenic wastewater treatment system. Background Art

[0002] With the acceleration of industrialization, heavy metal pollution is becoming increasingly serious, especially the presence of two toxic elements, antimony and arsenic, which has become a major hidden danger of environmental pollution. At present, the heavy metal removal technologies widely used in the wastewater treatment industry mainly include chemical precipitation, adsorption, ion exchange, membrane separation technology and other methods. The application of these methods has alleviated environmental pressure to a certain extent and improved the reuse rate of water resources, but they still face many challenges in actual operation.

[0003] The chemical precipitation method removes antimony and arsenic in water by adding chemical agents to form insoluble compounds; the adsorption method relies on the interaction between the active sites on the surface of specific adsorption materials and heavy metal ions to achieve the purpose of purification; ion exchange uses resins or other media with ion exchange functions to effectively remove target pollutants; membrane separation technology intercepts harmful substances based on the selective permeability of semipermeable membranes.

[0004] The general adsorption method only passes the wastewater through the adsorption material once, and the adsorption rate is low. It needs to be connected to equipment that applies other methods to remove antimony and arsenic in the wastewater. Therefore, the general antimony and arsenic wastewater treatment system sets up multi-stage reaction tanks for multi-stage reactions, which makes the treatment system bulky, occupies a large area, and has high construction costs. Summary of the invention

[0005] In view of the fact that the general adsorption method only passes the wastewater through the adsorption material once, the adsorption rate is low, and it is necessary to connect equipment using other methods to remove antimony and arsenic in the wastewater. As a result, the general antimony and arsenic wastewater treatment system is equipped with multi-stage reaction tanks for multi-stage reactions, which makes the treatment system bulky, occupies a large area, and has high construction costs. The present application proposes an antimony and arsenic wastewater treatment system that reduces the number of reaction tanks by circulating within the reaction tank, and adopts the following technical solution.

[0006] A fixed bed antimony and arsenic wastewater treatment system comprises a primary regulating tank, a fixed bed, a secondary regulating tank and a filtering tank which are connected in sequence.

[0007] The fixed bed includes a first shell, and a plurality of barrels, flow-pushing cylinders and flow-pushing devices installed in the first shell. The barrel is filled with adsorption material. The upper and lower end openings of the barrel are provided with a fine mesh, and the aperture of the fine mesh is smaller than the particle size of the adsorption material. The upper and lower ends of the flow-pushing cylinder are open. The flow-pushing device is installed in the flow-pushing cylinder and is configured to push the fluid upward to flow out of the upper end opening of the flow-pushing cylinder.

[0008] On the side, each of the barrels seamlessly fits each other and seamlessly surrounds the plug flow tube, and the combination of the multiple barrels and the plug flow tube seamlessly fits the inner circumferential wall of the first shell, so that the combination of all the barrel cavities becomes the only flow channel for the fixed bed from the top of the multiple barrels to the bottom.

[0009] By adopting the above technical solution, after the pH of the wastewater is adjusted in the first-level regulating tank, the wastewater is injected into the fixed bed, the adsorption material is fixed in the barrel, the wastewater passes through the barrel and flows to the bottom of the first shell, and then the flow pusher pumps the wastewater at the bottom to the top of multiple barrels for re-adsorption. After repeated multiple times, the antimony and arsenic in the wastewater are fully adsorbed, and the concentration of antimony and arsenic remaining in the wastewater can be reduced to below the emission standard. This solution reduces the concentration of antimony and arsenic in the wastewater through circulation in a single reaction tank, has a high adsorption rate, does not require the setting of multiple reaction tanks for multi-stage reactions, reduces the volume of the treatment system, and reduces construction costs.

[0010] A preferred solution of the fixed bed antimony and arsenic wastewater treatment system is that the first shell has a square section. The multiple barrels and the plug flow tube are installed in the square section. Each of the barrels and the plug flow tube is a square tube with openings at both ends. In the lateral direction, the multiple barrels and the plug flow tube are seamlessly fitted to each other to form a combination with a square outer surface, and the outer four walls of the combination are seamlessly fitted to the inner four walls of the square section.

[0011] By adopting the above technical solution, the square section of the shell, the barrel and the plug flow barrel are all square, so they can be seamlessly fitted with each other, which is convenient for design and manufacturing and low in cost.

[0012] A preferred solution of the fixed bed antimony and arsenic wastewater treatment system is that the primary regulating tank is connected to the fixed bed through a first overflow pipe. The upper end of the plug flow cylinder is higher than the connection port of the first overflow pipe and the fixed bed, and lower than the upper edge of the first shell. The lower end of the plug flow cylinder is lower than the lower ends of all barrels.

[0013] By adopting the above technical solution, the wastewater from the primary regulating tank to the fixed bed will not flow directly into the plug flow tube, but will flow to the barrel for adsorption. The lower end of the plug flow tube can absorb the wastewater adsorbed by the barrel, and the wastewater sprayed from the upper end of the plug flow tube also falls into the upper openings of multiple barrels more evenly, effectively repeatedly adsorbing the wastewater and effectively reducing the antimony and arsenic content in the wastewater.

[0014] A preferred solution of the fixed bed antimony and arsenic wastewater treatment system is that a first stirring paddle and a first partition are installed inside the primary regulating tank. Both sides of the first partition are seamlessly connected to the inner wall of the primary regulating tank. The lower end of the first partition is located below the first stirring paddle, and the lower end of the first partition is located above the bottom surface of the primary regulating tank. The primary regulating tank has a first overflow port, and the first overflow pipe is connected to the first overflow port. The first overflow port and the first stirring paddle are located on both sides of the first partition; the first overflow port is higher than the first stirring paddle.

[0015] By adopting the above technical solution, the wastewater may contain some solid impurities. After the first stirring paddle stirs the wastewater, the solid impurities are easily carried up and scattered in the water. Under the blocking effect of the first partition, on the side of the first partition facing the first overflow port, the solid impurities are carried up with less force and are easily deposited. Therefore, the wastewater overflowing to the fixed bed is clearer and is not easy to cause blockage of the barrel.

[0016] A preferred solution of the fixed bed antimony and arsenic wastewater treatment system is that the filter tank comprises a second shell, a support frame, a lifting frame, a multi-layer filter plate, an upper telescopic device and a lifting mechanism. The second shell is provided with a water inlet.

[0017] The stator of the upper telescopic device is fixed to the support frame. The telescopic shaft of the upper telescopic device is connected to the lifting frame. The multi-layer filter plate is installed in the lifting frame. The upper telescopic device can drive the lifting frame to enter the second shell, so that the combination of the lifting frame and the multi-layer filter plate fits the inner circumferential wall of the second shell, and the multi-layer filter plate is located below the water inlet.

[0018] Each layer of filter plate includes a square frame and a filter screen. The filter screen is fixed in the square frame. The upper surface of the square frame has a T-shaped bar. The lower surface of the square frame has a T-shaped groove. The T-shaped bar of each lower square frame can be adaptively inserted into the T-shaped groove of the upper square frame. The lifting frame has a side opening for the multi-layer filter plate to enter and exit along the axial direction of the T-shaped bar.

[0019] The lifting mechanism is installed on the lifting frame and is configured to lift or lower the multi-layer filter plate so that the multi-layer filter plate is separated from or falls back to the inner bottom surface of the lifting frame.

[0020] By adopting the above technical solution, after filtering for a certain period of time, a lot of solid impurities are deposited on the upper filter plate. When the upper filter plate needs to be replaced, the upper telescopic device lifts the multi-layer filter plate by lifting the lifting frame, and the upper filter plate is removed from the side opening of the lifting frame. Then the lifting mechanism lifts the remaining multi-layer filter plates, and the new filter plate is slid under the bottom filter plate along the bottom T-shaped groove to form a new multi-layer filter plate. The lifting mechanism puts down the multi-layer filter plate, and the upper telescopic device puts down the lifting frame, and the filtration can be started by washing. In this way, the top filter plate can be removed in sequence. Since the multi-layer filter plate transitions from the dirtiest to the least dirty from top to bottom, the system and the method of replacing the filter plate are more reasonable, improve filtering efficiency and reduce costs.

[0021] A preferred solution of the fixed bed antimony and arsenic wastewater treatment system is that the upper surface of the square frame has two parallel T-shaped strips located on a set of opposite sides of the square frame. The lower surface of the square frame has two T-shaped grooves. The two T-shaped strips of each lower square frame can be adaptively inserted into the two T-shaped grooves of the upper square frame.

[0022] The lifting mechanism includes a middle telescopic device and two groups of clamping assemblies. The stator of the middle telescopic device is fixed to the lifting frame. The telescopic shaft of the middle telescopic device is connected to the two groups of clamping assemblies, and each group of clamping assemblies is configured to clamp or release the T-shaped bar.

[0023] By adopting the above technical solution, when replacing the filter plate, removing the upper filter plate and inserting the lower filter plate can be done by sliding, and the T-shaped bar can also be clamped by the clamping assembly and then lifted to achieve the insertion of the new lower filter plate.

[0024] A preferred solution of the fixed bed antimony and arsenic wastewater treatment system is that each group of the clamping components includes a lower retractor, a fixing part, a left half clamp, a right half clamp, a middle part, a left spring, a right spring, a left rod and a right rod.

[0025] A mounting piece is fixed downwardly to the telescopic shaft of the middle telescope. The stator of each lower telescope is fixed to the mounting piece. The fixing piece is fixed to the stator of the lower telescope. The telescopic shaft of the lower telescope is hinged to one end of the left rod and one end of the right rod through a first hinge joint. The left half clamp is hinged to the right half clamp through a second hinge joint. The other end of the left rod is hinged to the tail end of the left half clamp through a third hinge joint. The other end of the right rod is hinged to the tail end of the right half clamp through a fourth hinge joint.

[0026] The middle piece is located between the first hinged joint and the second hinged joint. The fixing piece is fixedly connected to the middle piece.

[0027] One end of the left spring is connected to one side of the middle member. One end of the right spring is connected to the other side of the middle member. The other end of the left spring is connected to the area between the third hinge joint and the second hinge joint of the left half-clip. The other end of the right spring is connected to the area between the fourth hinge joint and the second hinge joint of the right half-clip.

[0028] Each set of the left half clamp and the right half clamp is downwardly directed toward a T-shaped bar of the uppermost filter plate. The clamping head end of the left half clamp and the clamping head end of the right half clamp can be driven to approach each other to clamp the T-shaped bar, or to move away from each other to release the T-shaped bar.

[0029] By adopting the above technical solution, when the telescopic shaft of the lower telescopic device moves, the left half clamp and the right half clamp rotate relative to each other, and cooperate with the up and down telescopic movement of the middle telescopic device to realize the clamping and releasing action of the T-shaped bar, so that the multi-layer filter plate can be lifted and put down, which is convenient for replacing the filter plate. The above hinged relationship can prevent the left half clamp and the right half clamp from twisting.

[0030] A preferred solution of the fixed bed antimony and arsenic wastewater treatment system is that the fixing part is a pipe sleeve, and strip openings are respectively provided on both sides of the fixing part. The telescopic axis of the lower telescopic device is arranged in the fixing part. The strip opening is parallel to the telescopic axis of the lower telescopic device. The left rod and the right rod each pass through the strip opening on one side.

[0031] By adopting the above technical solution, the fixing member can pass through the left rod and the right rod without contact and be fixed to the middle member, and the rotation of the left rod and the right rod in the vertical plane is not interfered by the fixing member.

[0032] A preferred solution of the fixed bed antimony and arsenic wastewater treatment system is that each group of the clamping components further includes a connecting rod. The second hinged joint includes a rotating shaft. The left half clamp and the right half clamp are both rotatably connected to the rotating shaft. The two ends of the connecting rod are respectively connected to the middle piece and the rotating shaft.

[0033] By adopting the above technical solution, the connecting rod further prevents the left half clamp and the right half clamp from twisting.

[0034] A preferred solution of the fixed bed antimony and arsenic wastewater treatment system is that the clamping end of the left half clamp is L-shaped, the clamping end of the right half clamp is L-shaped, the clamping end of the left half clamp and the clamping end of the right half clamp are symmetrically arranged, and can be adaptively supported on both sides below the upper horizontal plate of the T-shaped bar.

[0035] By adopting the above technical solution, the left half clamp and the right half clamp firmly clamp the T-shaped bar and are not easy to slip off.

[0036] In summary, the fixed bed antimony and arsenic wastewater treatment system of the present application has the following beneficial effects: the wastewater repeatedly passes through the barrel, and the antimony and arsenic in the wastewater are repeatedly adsorbed, so that the adsorption rate of antimony and arsenic in the wastewater is high, and there is no need to set up a multi-stage reaction tank for multi-stage reaction, which reduces the volume of the treatment system and reduces the construction cost.

[0037] The system lifts the multi-layer filter plate by lifting the lifting frame through the upper telescopic device, and the upper filter plate can be moved out from the side opening of the lifting frame. Then the lifting mechanism lifts the remaining multi-layer filter plates, and the new filter plate is slid under the lowest filter plate along the lowest T-shaped groove to form a new multi-layer filter plate, so that the system and the method of replacing the filter plate are more reasonable, the filtering efficiency is improved and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a three-dimensional diagram of a fixed-bed antimony and arsenic wastewater treatment system.

[0039] Figure 2 for Figure 1 A cross-sectional diagram of the internal structure.

[0040] Figure 3 for Figure 2 Another annotation diagram of .

[0041] Figure 4 A top view of the fixed bed.

[0042] Figure 5 for Figure 1 Another perspective of the picture.

[0043] Figure 6 This is the front view of the filter tank.

[0044] Figure 7 for Figure 6 An internal structure diagram after hiding the second shell and the structure under the second shell.

[0045] Figure 8 for Figure 7 Stereoscopic diagram.

[0046] Fig. 9 This is a structural diagram of the lifting frame.

[0047] Fig.10 for Figure 7 A magnified image of area A.

[0048] Fig.11 A perspective view of the clamping assembly.

[0049] Fig.12 Structural diagram of the clamping assembly after hiding the fixings and intermediate parts.

[0050] Figure numerals: 1, primary regulating tank; 2, fixed bed; 3, secondary regulating tank; 4, filtering tank; 101, first acid tank; 102, first alkali tank; 103, liquid inlet pipe; 104, first overflow port; 105, first overflow pipe; 106, first stirring paddle; 107, first partition plate; 108, first pumping pipe; 109, first pumping pump; 201, first shell; 2011, square section; 2012, cone section; 202, barrel; 203, flow-pushing barrel; 204, flow-pushing device; 205, fine mesh; 301, second acid tank; 302, second alkali tank; 303, second stirring paddle; 304, second partition plate; 305, second overflow pipe; 306, second pumping pipe; 307, second pumping pump; 401, second shell; 402, support Support frame; 403, lifting frame; 404, filter plate; 405, upper telescope; 4011, water inlet; 4031, bottom plate; 4032, vertical plate; 4033, connecting strip; 4034, side opening; 4012, square shell section; 4041, square frame; 4042, filter screen; 4043, T-shaped strip; 4044, T-shaped slot; 406, middle telescope; 407, mounting piece; 408, lower telescope; 409, fixing piece; 410, left half clamp; 411, right half clamp; 412, middle piece; 413, left spring; 414, right spring; 415, left rod; 416, right rod; 4091, strip mouth; 417, first hinge joint; 418, second hinge joint; 419, third hinge joint; 420, fourth hinge joint; 421, connecting rod. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] like Figure 1 A fixed bed antimony and arsenic wastewater treatment system includes a primary regulating tank 1, a fixed bed 2, a secondary regulating tank 3, a filtering tank 4 connected in sequence, and other accessories.

[0053] The primary regulating tank 1 is connected to the first acid tank 101 and the first alkali tank 102, which are respectively filled with acid and alkali, wherein the acid can be dilute sulfuric acid and the alkali can be lime milk or dilute sodium hydroxide. The first acid tank 101 is connected to the top of the primary regulating tank 1 through a pipeline, and a valve is installed on the pipeline. The first alkali tank 102 is connected to the top of the primary regulating tank 1 through a pipeline, and a valve is installed on the pipeline.

[0054] One side of the primary regulating tank 1 is connected to a liquid inlet pipe 103, and the liquid inlet pipe 103 introduces the initial wastewater containing antimony and arsenic. A valve is installed on the liquid inlet pipe 103.

[0055] like Figure 2 , a first overflow port 104 is provided on the other side of the primary regulating tank 1, which is connected to the fixed bed 2 through the first overflow pipe 105. A first stirring paddle 106 and a first partition 107 are installed in the primary regulating tank 1. The primary regulating tank 1 is a square box. The first partition 107 is square, and the two sides of the first partition 107 are attached to the two inner side walls of the primary regulating tank 1. The lower end of the first partition 107 is located above the bottom of the primary regulating tank 1, and the upper end of the first partition 107 is higher than the interface between the liquid inlet pipe 103 and the primary regulating tank 1. The first stirring paddle 106 and the first overflow port 104 are respectively located on both sides of the first partition 107. The volume of the side where the first stirring paddle 106 is located is relatively large, and the first acid tank 101 and the first alkali tank 102 are connected to this side, which is convenient for stirring more water flow to fully mix the acid or alkali. The volume of the side where the first overflow port 104 is located is relatively small, which prevents excessive movement of particles and promotes the sedimentation of particles. The first overflow pipe 105 is suitable for continuous operation. After stopping the continuous operation, the remaining wastewater in the first-level regulating tank 1 is generally discharged to the fixed bed 2. At this time, the first overflow pipe 105 cannot discharge the liquid in the first-level regulating tank 1 to the fixed bed 2. Therefore, the system is also provided with a first pumping pipe 108 and a first pumping pump 109. The first pumping pipe 108 connects the first-level regulating tank 1 and the fixed bed 2. The first pumping pump 109 is installed on the first pumping pipe 108, which can pump the liquid in the first-level regulating tank 1 to the fixed bed 2.

[0056] like Figure 3 The fixed bed 2 includes a first shell 201, which has a square section 2011 and a cone section 2012 connected to each other from top to bottom. The cone section 2012 is not a cone, but a quadrangular pyramid surrounded by four inclined surfaces, with the small end facing downward, and the small end is connected to the upper end of the secondary regulating tank 3 through a lower row pipe, and a valve and a pump are installed on the lower row pipe.

[0057] Combination Figure 4 The fixed bed 2 includes a plurality of barrels 202, flow-propelling barrels 203 and flow-propelling devices 204 installed in the square section 2011. The upper and lower ends of each barrel 202 are open, and the barrel 202 is filled with adsorption material. The upper and lower ends of each barrel 202 are installed with a fine mesh 205 for fixing the adsorption material. The mesh of the fine mesh 205 is smaller than the size of the adsorption material particles, so that the adsorption material particles are not easy to pass through the fine mesh 205 and flow out of the barrel 202. The adsorption material can be activated alumina, molecular sieve or activated carbon, etc. The adsorption material is activated alumina. The pH of the wastewater in the primary regulating tank 1 is adjusted to 5.7~6.1. The wastewater in this state is passed into the fixed bed 2. The activated alumina has a high adsorption rate for antimony and arsenic in the wastewater.

[0058] Each barrel 202 is in the same hollow square column shape, and all barrels 202 are arranged in parallel vertically, and the upper and lower ends of all barrels 202 are flush. All barrels 202 are arranged in a horizontal direction in a seamless manner, forming a combination body with a square periphery, and a square cavity is left in the center of the combination body, and a square tube-shaped plug flow cylinder 203 is inserted into the square cavity. The four walls of the plug flow cylinder 203 and the four barrels 202 on the surrounding side are seamlessly fitted, and the upper and lower ends of the plug flow cylinder 203 are open. The upper end of the plug flow cylinder 203 is higher than the upper ends of all barrels 202, and the lower end of the plug flow cylinder 203 is lower than the lower ends of all barrels 202.

[0059] The combination of all the barrels 202 and the inner walls of the four sides of the square segment 2011 fit seamlessly, so that the combination of the inner cavities of all the barrels 202 becomes the only flow channel of the fixed bed 2 from the top to the bottom of the multiple barrels 202.

[0060] The flow pusher 204 is installed in the flow pusher tube 203, and can draw liquid upward and spray it out from the upper opening of the flow pusher tube 203. The sprayed liquid enters the upper openings of multiple barrels 202 and penetrates downward. Antimony, arsenic ions in the wastewater are absorbed by the adsorption material, and then flow out of the barrel 202 and enter the cone section 2012. Under the action of the flow pusher 204, the wastewater in the cone section 2012 is continuously drawn out and sprayed out from the upper opening of the flow pusher tube 203, and then is adsorbed by the adsorption material in the barrel 202 again. After multiple cycles, the antimony and arsenic in the wastewater can be reduced to a level that meets the emission requirements.

[0061] The structure of the secondary regulating tank 3 and the accessories connected thereto are the same as those of the primary regulating tank 1. A second acid tank 301 and a second alkali tank 302 are connected to contain acid and alkali respectively. The acid can be dilute sulfuric acid, and the alkali can be lime milk or dilute sodium hydroxide. The second acid tank 301 is connected to the top of the secondary regulating tank 3 through a pipeline, and a valve is installed on the pipeline. The second alkali tank 302 is connected to the top of the secondary regulating tank 3 through a pipeline, and a valve is installed on the pipeline.

[0062] A second stirring paddle 303 and a second partition plate 304 are installed in the secondary regulating tank 3. The secondary regulating tank 3 is connected to the filter tank 4 through a second overflow pipe 305.

[0063] The Pollutant Emission Standards for Tin, Antimony and Mercury Industries (GB3770-2014) stipulates that the pH value of wastewater should be between 6 and 9. After being treated in the primary regulating tank 1 and the fixed bed 2, the wastewater needs to be adjusted in the secondary regulating tank 3 to a pH value between 6 and 9 to meet the emission requirements.

[0064] like Figure 3The system also includes a second pumping pipe 306 and a second pumping pump 307. The second pumping pipe 306 connects the secondary regulating tank 3 to the filter tank 4. The second pumping pump 307 is installed on the second pumping pipe 306 and can pump the liquid in the secondary regulating tank 3 into the upper end of the filter tank 4.

[0065] like Figure 5 The filter pool 4 includes a second housing 401, a support frame 402, a lifting frame 403, a multi-layer filter plate 404, an upper telescopic device 405 and a lifting mechanism. The second housing 401 is provided with a water inlet 4011, and the second overflow pipe 305 is connected to the water inlet 4011.

[0066] like Figure 6 The support frame 402 is arranged on the peripheral side of the second housing 401. The upper telescopic device 405 can be a cylinder, whose stator is fixed on the support frame 402, and whose telescopic shaft is connected to the lifting frame 403 downward.

[0067] like Figure 7 The lifting frame 403 has a square-shaped bottom plate 4031, two vertical plates 4032 and a plurality of vertical and horizontal connecting strips 4033.

[0068] like Figure 8 The two vertical plates 4032 are vertically fixed on two opposite sides of the bottom plate 4031, and the two vertical plates 4032 are parallel to each other.

[0069] like Fig. 9 , two side openings 4034 are formed between the two vertical plates 4032. The multi-layer filter plate 404 can be loaded into the lifting frame 403 through the side openings 4034 and seated on the square bottom plate 4031, and the multi-layer filter plate 404 can also be taken out of the lifting frame 403 through the side openings 4034. Two vertical connecting bars 4033 are connected to the two vertical plates 4032, and the transverse connecting bar 4033 connects the two vertical connecting bars 4033. The telescopic shaft of the upper telescopic device 405 is connected to the transverse connecting bar 4033, so that the lifting frame 403 can be driven to move up or down as a whole, and the lifting frame 403 can enter the second shell 401 or rise out of the second shell 401. After the lifting frame 403 enters the shell, the upper edge of the vertical plate 4032 can be located below the water inlet 4011. The multi-layer filter plate 404 is located below the upper edge of the vertical plate 4032.

[0070] like Figure 6 The second outer shell 401 has a square shell section 4012, and two vertical plates 4032 are in contact with the inner walls on both sides of the square shell section 4012. The multi-layer filter plate 404 is a square column. The two end surfaces of the multi-layer filter plate 404 facing the two side openings 4034 of the lifting frame 403 are in contact with the other two inner walls of the square shell section 4012, so that the incoming water flow will converge on the filter plate 404, and penetrate from the filter plate 404 to the bottom to complete the filtration.

[0071] like Figure 8 Each layer of filter plates 404 has the same structure, including a square frame 4041 and a filter screen 4042, and the filter screen 4042 is fixed in the square frame 4041. The square bottom plate 4031 of the lifting frame 403 allows the filter screen 4042 to pass through the water flow and support the multiple layers of filter plates 404.

[0072] A set of opposite sides of the upper surface of the square frame 4041 has two parallel T-shaped strips 4043. The lower surface of the square frame 4041 has two T-shaped slots 4044. The two T-shaped strips 4043 of each lower filter plate 404 can be adaptively slid into the two T-shaped slots 4044 of the upper filter plate 404. The two ends of the T-shaped strips 4043 face the two side openings 4034 of the lifting frame 403, so that the filter plate 404 can be moved out of the lifting frame 403 from the side openings 4034 or loaded into the lifting frame 403.

[0073] like Figure 6 The lifting mechanism includes a middle telescopic device 406 and two sets of clamping components. The middle telescopic device 406 can be a cylinder, whose stator is fixed on the lifting frame 403, and a mounting member 407 is fixed below its telescopic axis. The mounting member 407 is a horizontal square bar. The two sets of clamping components are installed at both ends of the square bar so that the weight of both ends is balanced.

[0074] like Fig.10 Each set of clamping components includes a lower retractor 408, a fixing member 409, a left half clamp 410, a right half clamp 411, a middle member 412, a left spring 413, a right spring 414, a left rod 415 and a right rod 416.

[0075] The lower retractor 408 may be a cylinder, a stator of which is fixed to one end of the mounting member 407 .

[0076] like Fig.11 The fixing member 409 may be a pipe sleeve, and vertical strip openings 4091 are respectively provided on the left and right sides thereof.

[0077] like Fig.12 The telescopic shaft of the lower telescopic device 408 is located in the fixing member 409 without contact, and the lower end of the telescopic shaft of the lower telescopic device 408 is hinged to one end of the left rod 415 and one end of the right rod 416 at the same time through the first hinge joint 417.

[0078] The left half clamp 410 and the right half clamp 411 are hinged by a second hinge joint 418. The left rod 415 extends out of the strip opening 4091 on the left side of the fixing member 409, and the other end of the left rod 415 is hinged to the tail end of the left half clamp 410 by a third hinge joint 419. The right rod 416 extends out of the strip opening 4091 on the right side of the fixing member 409, and the other end of the right rod 416 is hinged to the tail end of the right half clamp 411 by a fourth hinge joint 420.

[0079] The middle piece 412 is located between the first hinge joint 417 and the second hinge joint 418. The middle piece 412 is a block, which is fixed to the lower end of the fixing piece 409. The fixing piece 409 and the middle piece 412 may be integrally formed.

[0080] In addition to the above-mentioned case where the fixing member 409 is a pipe sleeve, in other embodiments, the fixing member 409 can also be two rod-shaped objects that wrap around the telescopic axis of the lower telescoping device 408, and the lower ends of the rods are connected to the middle member 412.

[0081] The two ends of the middle member 412 are respectively connected to one end of the left spring 413 and one end of the right spring 414. The other end of the left spring 413 is connected to the area of ​​the left half clamp 410 between the third hinge joint 419 and the second hinge joint 418. The other end of the right spring 414 is connected to the area of ​​the right half clamp 411 between the fourth hinge joint 420 and the second hinge joint 418.

[0082] The clamping end of the left half clamp 410 is L-shaped, and the clamping end of the right half clamp 411 is L-shaped. The clamping end of the left half clamp 410 and the clamping end of the right half clamp 411 are symmetrically arranged and the left half clamp 410 and the right half clamp 411 face downwardly to the T-shaped strip 4043 of the uppermost filter plate 404. It should be noted that the clamping end and the tail end are respectively located on both sides of the second hinge 418, and the clamping end is used to clamp the T-shaped strip 4043.

[0083] In an optional embodiment, the clamping assembly further includes a connecting rod 421. The second hinge joint 418 includes a rotating shaft 422. The left half clamp 410 and the right half clamp 411 are both rotatably connected to the rotating shaft 422. The two ends of the connecting rod 421 are respectively connected to the middle piece 412 and the rotating shaft 422. The function of the connecting rod 421 is to enhance the stability of the relative hinged movement of the left half clamp 410 and the right half clamp 411.

[0084] The upper telescopic device 405, the middle telescopic device 406 and the two lower telescopic devices 408 all perform vertical telescopic movement.

[0085] After the multi-layer filter plates 404 have been used for a period of time, more solid impurities will be deposited on the upper surface of the upper filter plates 404. The lower the layer, the fewer particulate impurities there are. The solution of the present application can replace the top filter plate 404 each time and install a new filter plate 404 at the bottom. In this process, the dirtiest filter plate 404 is removed each time, and the added new filter plate 404 is located at the bottom, so that the multi-layer filter plates 404 are kept in a state from the dirtiest to the least dirty from top to bottom. This design saves costs and improves filtration efficiency.

[0086] The specific process of replacing the filter plate 404 of the filter pool 4 is as follows: the upper telescopic device 405 is started to lift the lifting frame 403 out of the second shell 401; the uppermost filter plate 404 is manually taken out by sliding the uppermost filter plate 404 horizontally out of the side opening 4034 of the lifting frame 403, and after taking it out, the second uppermost filter plate 404 becomes the uppermost filter plate 404; confirm that the combination of the two groups of left half clamps 410 and right half clamps 411 are both in the open state, if not, first start the lower telescopic device 408, and its telescopic axis moves downward, driving the left rod 415 and the right rod 416 to open to the left and right sides, so that the left half clamp 410 and the right half clamp 411 are in the open state. The chuck ends of the left and right half clamps 410 and 411 are also opened. After confirming that the opening distance of the chuck ends of the left and right half clamps 410 and 411 is greater than the width of the upper horizontal plate of the T-shaped bar 4043, the middle telescopic device 406 is started, and the two groups of clamping components are moved down to above the two parallel T-shaped bars 4043 on the uppermost layer, and the chuck ends of the left and right half clamps 410 and 411 are respectively located on the horizontal sides of the upper horizontal plate of the T-shaped bar 4043, and the lower telescopic device 408 is started. Its telescopic axis moves upward, driving the left rod 415 and the right rod 416 to tighten toward each other, so that the chuck ends of the left and right half clamps 410 and 411 are also tightened and directly clamped to the lower side of the upper horizontal plate of the T-shaped bar 4043, keeping the left and right half clamps 410 and 411 in a state of being ... The left and right half clamps 410 and 411 are in a tightened state, and the middle retractor 406 is started, which drives the two groups of clamping components to move upward, and the multi-layer filter plates 404 move upward and separate from the square-mouthed bottom plate 4031 of the lifting frame 403; the new filter plate 404 is slid in from the side opening 4034 of the lifting frame 403, specifically, the two T-shaped strips 4043 on the upper surface of the new filter plate 404 slide into the two T-shaped grooves 4044 of the bottom filter plate 404, and the two ends of the new plate and the old plate are aligned; the left and right half clamps 410 and 411 are kept in a tightened state, and the middle retractor 406 is started, which drives the two groups of clamping components to move downward, and the multi-layer filter plates 404 move downward and re- The multi-layer filter plate 404 is newly seated on the square bottom plate 4031 of the lifting frame 403; the lower telescopic device 408 is started, and its telescopic axis moves downward, driving the left rod 415 and the right rod 416 to open to the left and right sides, so that the clamping head ends of the left half clamp 410 and the right half clamp 411 are also opened, thereby releasing the multi-layer filter plate 404; the middle telescopic device 406 is started, which drives the two opened clamping components to move up to a certain height; the upper telescopic device 405 is started, and the lifting frame 403 together with the multi-layer filter plate 404 is installed into the second shell 401, and the multi-layer filter plate 404 is located and the upper edge of the vertical plate 4032 is located below the water inlet 401, completing one replacement of the filter plate 404.

[0087] The fixed bed antimony and arsenic wastewater treatment system repeatedly passes the wastewater through the adsorption material in the same fixed bed 2. After multiple cycles, the wastewater can meet the emission requirements of antimony concentration ≤ 0.3 mg / L and arsenic concentration ≤ 0.1 mg / L specified in the "Tin, Antimony and Mercury Industrial Pollutant Emission Standard" (GB3770-2014). It is suitable for the treatment of antimony and arsenic wastewater generated by industrial activities such as mining and smelting, with a short treatment process and low cost.

[0088] The above are only some embodiments of the present application, and the protection scope of the present application is not limited to the above embodiments. For ordinary technicians in this technical field, some improvements and modifications without departing from the creative design of the present application should also fall within the protection scope of the present application.

Claims

1. A fixed bed antimony and arsenic wastewater treatment system, characterized in that: It comprises a primary regulating tank (1), a fixed bed (2), a secondary regulating tank (3) and a filtering tank (4) which are connected in sequence; The fixed bed (2) comprises a first shell (201), and a plurality of barrels (202), flow-pushing barrels (203) and flow-pushing devices (204) installed in the first shell (201); the barrel (202) is filled with adsorption material; the upper and lower end openings of the barrel (202) are installed with a fine mesh (205), the aperture of the fine mesh (205) being smaller than the particle size of the adsorption material; the upper and lower ends of the flow-pushing barrel (203) are open; the flow-pushing device (204) is installed in the flow-pushing barrel (203) and is configured to push the fluid upward to flow out of the upper end opening of the flow-pushing barrel (203); On the side, each of the barrels (202) is seamlessly fitted to each other and seamlessly surrounds the plug flow cylinder (203), and the combination of the multiple barrels (202) and the plug flow cylinder (203) is seamlessly fitted to the inner circumferential wall of the first shell (201), so that the combination of the inner cavities of all the barrels (202) becomes the only flow channel of the fixed bed (2) from the top of the multiple barrels (202) to the bottom.

2. The fixed bed antimony and arsenic wastewater treatment system according to claim 1 is characterized in that: The first housing (201) has a square section (2011); the plurality of barrels (202) and the plug flow tube (203) are all installed in the square section (2011); each of the barrels (202) and the plug flow tube (203) is a square tube with openings at both ends; in the lateral direction, the plurality of barrels (202) and the plug flow tube (203) are seamlessly fitted to each other to form a combination body with a square outer surface, and the outer four walls of the combination body are seamlessly fitted to the inner four walls of the square section (2011).

3. The fixed bed antimony and arsenic wastewater treatment system according to claim 2 is characterized in that: The primary regulating tank (1) is connected to the fixed bed (2) via a first overflow pipe (105); the upper end of the plug flow cylinder (203) is higher than the connection port between the first overflow pipe (105) and the fixed bed (2), and lower than the upper edge of the first shell (201); and the lower end of the plug flow cylinder (203) is lower than the lower ends of all the barrels (202).

4. The fixed bed antimony and arsenic wastewater treatment system according to claim 3 is characterized in that: The first regulating tank (1) is internally provided with a first stirring paddle (106) and a first baffle (107); both sides of the first baffle (107) are seamlessly connected to the side walls of the first regulating tank (1); the lower end of the first baffle (107) is located below the first stirring paddle (106), and the lower end of the first baffle (107) is spaced above the bottom surface of the first regulating tank (1); the first regulating tank (1) has a first overflow port (104), and the first overflow pipe (105) is connected to the first overflow port (104); the first overflow port (104) and the first stirring paddle (106) are located on both sides of the first baffle (107); and the first overflow port (104) is higher than the first stirring paddle (106).

5. The fixed bed antimony and arsenic wastewater treatment system according to claim 1 is characterized in that: The filter pool (4) comprises a second outer shell (401), a support frame (402), a lifting frame (403), a multi-layer filter plate (404), an upper telescopic device (405) and a lifting mechanism; the second outer shell (401) is provided with a water inlet (4011); The stator of the upper telescopic device (405) is fixed to the support frame (402); the telescopic shaft of the upper telescopic device (405) is connected to the lifting frame (403); the multi-layer filter plate (404) is installed in the lifting frame (403); the upper telescopic device (405) can drive the lifting frame (403) to enter the second outer shell (401), so that the combination of the lifting frame (403) and the multi-layer filter plate (404) fits the inner peripheral wall of the second outer shell (401), and the multi-layer filter plate (404) is located below the water inlet (4011); Each layer of filter plates (404) comprises a square frame (4041) and a filter screen (4042); the filter screen (4042) is fixed in the square frame (4041); the upper surface of the square frame (4041) has a T-shaped bar (4043); the lower surface of the square frame (4041) has a T-shaped groove (4044); the T-shaped bar (4043) of each lower square frame (4041) can be adaptively inserted into the T-shaped groove (4044) of the upper square frame (4041); the lifting frame (403) has a side opening (4034) for the multi-layer filter plates (404) to enter and exit along the axial direction of the T-shaped bar (4043); The lifting mechanism is installed on the lifting frame (403) and is configured to lift or lower the multi-layer filter plate (404) so ​​that the multi-layer filter plate (404) is detached from or falls back to the inner bottom surface of the lifting frame (403).

6. The fixed bed antimony and arsenic wastewater treatment system according to claim 5, characterized in that: The upper surface of the square frame (4041) has two parallel T-shaped bars (4043) located on a set of opposite sides of the square frame (4041); the lower surface of the square frame (4041) has two T-shaped grooves (4044); the two T-shaped bars (4043) of each lower square frame (4041) can be adaptively inserted into the two T-shaped grooves (4044) of the upper square frame (4041); The lifting mechanism comprises a middle telescopic device (406) and two groups of clamping assemblies; the stator of the middle telescopic device (406) is fixed to the lifting frame (403); the telescopic shaft of the middle telescopic device (406) is connected to the two groups of clamping assemblies, and each group of clamping assemblies is configured to be able to clamp or release the T-shaped bar (4043).

7. The fixed bed antimony and arsenic wastewater treatment system according to claim 6 is characterized in that: Each group of the clamping components comprises a lower retractor (408), a fixing member (409), a left half clamp (410), a right half clamp (411), a middle member (412), a left spring (413), a right spring (414), a left rod (415) and a right rod (416); A mounting member (407) is fixed downwardly to the telescopic shaft of the middle telescopic device (406); the stator of each lower telescopic device (408) is fixed to the mounting member (407); the fixing member (409) is fixed to the stator of the lower telescopic device (408); the telescopic shaft of the lower telescopic device (408) is hinged to one end of the left rod (415) and one end of the right rod (416) through a first hinge joint (417); the left half clamp (410) is hinged to the right half clamp (411) through a second hinge joint (418); the other end of the left rod (415) is hinged to the rear end of the left half clamp (410) through a third hinge joint (419); the other end of the right rod (416) is hinged to the rear end of the right half clamp (411) through a fourth hinge joint (420); The middle piece (412) is located between the first hinged joint (417) and the second hinged joint (418); the fixing piece (409) is fixedly connected to the middle piece (412); One end of the left spring (413) is connected to one side of the middle piece (412); one end of the right spring (414) is connected to the other side of the middle piece (412); the other end of the left spring (413) is connected to the area of ​​the left half clamp (410) between the third hinge joint (419) and the second hinge joint (418); the other end of the right spring (414) is connected to the area of ​​the right half clamp (411) between the fourth hinge joint (420) and the second hinge joint (418); Each set of the left half clamp (410) and the right half clamp (411) is downwardly directed toward a T-shaped bar (4043) of the uppermost filter plate (404); the clamping head end of the left half clamp (410) and the clamping head end of the right half clamp (411) can be driven to move closer to each other to clamp the T-shaped bar (4043), or move away from each other to release the T-shaped bar (4043).

8. The fixed bed antimony and arsenic wastewater treatment system according to claim 7, characterized in that: The fixing member (409) is a pipe sleeve, and strip-shaped openings (4091) are respectively provided on two sides of the fixing member (409); the telescopic axis of the lower telescopic device (408) is arranged in the fixing member (409); the strip-shaped opening (4091) is parallel to the telescopic axis of the lower telescopic device (408); and the left rod (415) and the right rod (416) respectively pass through the strip-shaped opening (4091) on one side.

9. The fixed bed antimony and arsenic wastewater treatment system according to claim 7, characterized in that: Each group of the clamping assemblies further comprises a connecting rod (421); the second hinged joint (418) comprises a rotating shaft (422); the left half clamp (410) and the right half clamp (411) are both rotatably connected to the rotating shaft (422); and the two ends of the connecting rod (421) are respectively connected to the middle piece (412) and the rotating shaft (422).

10. The fixed bed antimony and arsenic wastewater treatment system according to claim 7, characterized in that: The clamping head end of the left half clamp (410) is L-shaped, and the clamping head end of the right half clamp (411) is L-shaped. The clamping head end of the left half clamp (410) and the clamping head end of the right half clamp (411) are symmetrically arranged and can be adaptively supported on both sides below the upper horizontal plate of the T-shaped bar (4043).

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