Recycling treatment device for contaminated soil leacheate

Abstract

The utility model discloses a cyclic utilization treatment device for contaminated soil leacheate, and relates to the technical field of sewage treatment.The feeding mechanism comprises a medicine feeding barrel fixedly connected to a fixing frame and an inclined plane block arranged on a mixing mechanism, the medicine feeding barrel is fixedly connected with a connecting frame, and the connecting frame is fixedly connected with the inclined plane block; the device comprises a connecting frame, the connecting frame is connected with a straight rod through a reset mechanism, the straight rod is fixedly connected with a first cross rod and a second cross rod, and one end of the straight rod is fixedly connected with a circular truncated cone block. According to the device, the cylinder can intermittently block the discharge port of the medicine feeding barrel, so that FeSO4 is fed into the reaction tank, excessive medicine fed at a time is avoided, and mixing and stirring of eluate and the medicine are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a recycling treatment device for polluted soil leaching liquid. Background Art

[0002] With the accelerated advancement of industrialization, my country has produced a large amount of heavy metal waste. Most of these pollutants are discharged into the environment without treatment, and accumulate and remain in the soil under the influence of various factors. Once the content of heavy metal pollutants in the soil exceeds the self-purification capacity of the soil environment, it will lead to heavy metal pollution of the soil, causing the soil resources to decrease rapidly. Soil chemical leaching is one of the commonly used treatment technologies for heavy metal soil pollution. It is widely used in China and has achieved effective soil remediation.

[0003] Chemical leaching technology mainly transfers pollutants from the soil surface to the leaching solution through desorption, anti-complexation and dissolution, and then circulates the leaching solution. It can be divided into in-situ leaching technology and ex-situ leaching technology. In-situ leaching technology refers to the injection of leaching solution into the soil. The leaching solution interacts with heavy metal pollutants during the downward infiltration process, but this method is prone to cause groundwater pollution. Ex-situ leaching technology includes soil column leaching method, oscillation leaching method, stirring leaching method, etc. In order to reduce the risk of secondary pollution after the use of the leaching solution, the recycling and treatment of the leaching solution becomes the key.

[0004] When the eluate in the existing reaction tank is processed, the medicine is directly added to the disposable reaction tank. Since too much medicine is added at one time, it takes a long time to mix and stir the eluate and the medicine, which is inconvenient to use. Utility Model Content

[0005] The purpose of the utility model is to provide a recycling treatment device for contaminated soil elution to solve the problems mentioned in the above background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A recycling and processing device for contaminated soil elution comprises a reaction pool, a fixing frame is fixedly connected to the reaction pool, and a mixing mechanism and a feeding mechanism are arranged on the fixing frame.

[0008] The feeding mechanism includes a medicine delivery barrel fixedly connected to a fixed frame and an inclined block arranged on a mixing mechanism, the medicine delivery barrel is fixedly connected to a connecting frame, the connecting frame is connected to a straight rod through a reset mechanism, the straight rod is fixedly connected to a first cross bar and a second cross bar, one end of the straight rod is fixedly connected to a truncated cone block, the bottom of the truncated cone block is fixedly connected to a cylinder used in conjunction with the inclined block, and the bottom of the cylinder is arranged to be inclined.

[0009] As a further solution of the utility model: the mixing mechanism includes a motor fixedly connected to a fixed frame, the output end of the motor is fixedly connected to a rotating shaft, one end of the rotating shaft passes through the fixed frame and extends into the reaction tank, and a mixing plate is fixedly connected to the rotating shaft.

[0010] As a further solution of the utility model: the reset mechanism includes a baffle fixedly connected to the other end of the straight rod and a spring sleeved on the straight rod, and the spring is fixedly connected to the baffle and the connecting frame respectively.

[0011] As a further solution of the utility model: a screw rod is threadedly connected to the connecting frame, and a circular plate is fixedly connected to the screw rod.

[0012] As a further solution of the utility model: the circular plate is located below the baffle plate, and the circular plate is in close contact with the baffle plate.

[0013] As a further solution of the utility model: a connecting rod is fixedly connected to the rotating shaft, and the connecting rod is fixedly connected to the inclined surface block.

[0014] The utility model provides a recycling and processing device for polluted soil leaching liquid. Compared with the prior art, it has the following beneficial effects:

[0015] (1) In the present application, FeSO4 is added to the drug delivery barrel, and the mixing mechanism can drive the inclined block to rotate. The coordination between the inclined block and the cylinder can make the cylinder intermittently block the discharge port of the drug delivery barrel, thereby achieving the delivery of FeSO4 to the reaction pool, thereby avoiding excessive delivery of drugs at one time, which is beneficial to the mixing and stirring of the eluate and the drugs.

[0016] (2) The present application sets a screw and a circular plate. When adding FeSO4 into the medicine delivery barrel, the circular plate is driven upward by rotating the screw, thereby driving the straight rod upward through the baffle plate, so that the cylinder blocks the discharge port of the medicine delivery barrel to prevent FeSO4 from being discharged from the medicine delivery barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a three-dimensional cross-sectional view of the medicine delivery barrel of the utility model;

[0019] Figure 3 For this utility model Figure 2 A partial enlarged view of the middle A;

[0020] Figure 4This is a process flow chart of the utility model.

[0021] In the figure: 1. reaction pool; 2. fixing frame; 3. mixing mechanism; 31. motor; 32. rotating shaft; 33. mixing plate; 4. feeding mechanism; 41. drug delivery barrel; 42. inclined block; 43. connecting frame; 44. reset mechanism; 441. baffle; 442. spring; 45. straight rod; 46. first cross bar; 47. second cross bar; 48. frustum block; 49. cylinder; 5. screw; 6. round plate; 7. connecting rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] See also Figure 1-4 As shown, the utility model is a recycling treatment device for contaminated soil elution, including a reaction pool 1, a fixed frame 2 is fixedly connected to the reaction pool 1, and a mixing mechanism 3 and a feeding mechanism 4 are arranged on the fixed frame 2; the feeding mechanism 4 includes a drug delivery barrel 41 fixedly connected to the fixed frame 2 and an inclined block 42 arranged on the mixing mechanism 3, the drug delivery barrel 41 is fixedly connected to a connecting frame 43, and a straight rod 45 is connected to the connecting frame 43 through a reset mechanism 44, and a first cross bar 46 and a second cross bar 47 are fixedly connected to the straight rod 45. By setting the first cross bar 46 and the second cross bar 47, the first cross bar 46 and the second cross bar 47 move up and down to avoid FeSO4 blocking in the drug. The drug delivery barrel 41 is conducive to the delivery of FeSO4 in the drug delivery barrel 41. One end of the straight rod 45 is fixedly connected to a truncated cone block 48. The bottom of the truncated cone block 48 is fixedly connected to a cylinder 49 used in conjunction with the inclined surface block 42. The bottom of the cylinder 49 is arranged to be inclined. By adding FeSO4 to the drug delivery barrel 41, the inclined surface block 42 can be driven to rotate under the action of the mixing mechanism 3. By utilizing the cooperation between the inclined surface block 42 and the cylinder 49, the cylinder 49 can intermittently block the discharge port of the drug delivery barrel 41, thereby realizing the delivery of FeSO4 into the reaction tank 1, thereby avoiding excessive drug delivery at one time, which is conducive to mixing and stirring the eluate and the drug.

[0025] The mixing mechanism 3 includes a motor 31 fixedly connected to the fixed frame 2, the motor 31 is electrically connected to an external power supply and is controlled by an external control program, an output end of the motor 31 is fixedly connected to a rotating shaft 32, one end of the rotating shaft 32 passes through the fixed frame 2 and extends into the reaction pool 1, and a mixing plate 33 is fixedly connected to the rotating shaft 32.

[0026] The reset mechanism 44 includes a baffle 441 fixedly connected to the other end of the straight rod 45 and a spring 442 sleeved on the straight rod 45. The spring 442 is fixedly connected to the baffle 441 and the connecting frame 43 respectively. By setting the reset mechanism 44, when the cylinder 49 moves upward, the cylinder 49 may be stuck at the discharge port of the drug delivery barrel 41 due to FeSO4. The reset mechanism 44 can be used to apply elastic force downward, which is conducive to the downward movement of the cylinder 49.

[0027] The rotating shaft 32 is fixedly connected with a connecting rod 7 , and the connecting rod 7 is fixedly connected to the inclined surface block 42 .

[0028] The utility model is attached Figure 4 The overall process flow includes three-stage gravity sedimentation tanks, aeration adjustment tanks, heavy metal reaction tanks, pH adjustment tanks, flocculation tanks, coagulant tanks, inclined plate sedimentation tanks, pH adjustment tanks, membrane treatment devices, clear water tanks, and dosing tanks for water treatment facilities, including: ferrous sulfate (FeSO4) dosing tanks, calcium hydroxide (Ca(OH)2) dosing tanks, polyaluminium chloride (PAC) dosing tanks, polyacrylamide (PAM) dosing tanks, and dilute sulfuric acid dosing tanks.

[0029] The three-stage gravity sedimentation tank is composed of three sedimentation tanks, and gravity is formed by the height difference. A vertical baffle is set above the tank body. When the eluate flows through the sedimentation tank, due to the blocking effect of the baffle, the suspended matter and solid particles in the eluate are deposited below the baffle, while the lighter substances are carried away by the water flow. Compared with the traditional two-stage sedimentation tank, the sedimentation effect is better and the removal rate is higher. An aeration system is set in the aeration regulating tank to equalize the water quality and water quantity, and then it is lifted to the reaction tank by the water inlet pump.

[0030] Embodiment 2

[0031] Based on Example 1, see Figure 1-3 shown.

[0032] The connecting frame 43 is threadedly connected with a screw rod 5, and the screw rod 5 is fixedly connected with a circular plate 6. By arranging the screw rod 5 and the circular plate 6, when FeSO4 is added to the medicine delivery barrel 41, the circular plate 6 is driven to rise by rotating the screw rod 5, thereby driving the straight rod 45 to rise through the baffle plate 441, so that the cylinder 49 blocks the discharge outlet of the medicine delivery barrel 41 to prevent FeSO4 from being discharged from the medicine delivery barrel 41.

[0033] The circular plate 6 is located below the baffle 441 , and the circular plate 6 and the baffle 441 are in close contact with each other.

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] The working principle of the utility model is as follows: by rotating the screw 5, the circular plate 6 is driven to rise, and then the circular plate 6 drives the baffle 441 to rise, thereby driving the truncated cone block 48 and the cylinder 49 to rise through the straight rod 45, and the cylinder 49 is used to block the discharge port of the drug delivery barrel 41, and then, FeSO4 is added to the drug delivery barrel 41, and FeSO4 is used as a heavy metal reactant. Then, the motor 31 is turned on, so that the motor 31 drives the mixing plate 33 and the connecting rod 7 to rotate through the rotating shaft 32, and the connecting rod 7 drives the inclined block 42 to rotate, and then, the screw 5 is slowly rotated to reset the cylinder 49, and then, the rotating inclined block 42 is used in conjunction with the cylinder 49, so that the cylinder 49 intermittently reciprocates up and down, so as to realize the delivery of FeSO4 into the reaction tank 1, thereby avoiding excessive drug delivery at one time, which is conducive to mixing and stirring the eluate and the drug.

[0036] In the subsequent steps, PAC is used as a flocculant and PAM as a coagulant, which has a good removal effect on arsenic, chromium and copper. The eluate reacts with the FeSO4 added by the dosing tank in the reaction tank. The dosage is determined according to the heavy metal content in the soil. The subsequent effluent enters the pH adjustment tank, and CA(OH)2 is added to adjust the pH of the wastewater to about 9. After that, it flows into the flocculation tank by gravity. PAC is added at a dosage of 100ppm. The colloids and dispersed particles of the suspended matter form flocs under the interaction of molecular forces and they collide and condense with each other during the sedimentation process, and their size and mass continue to increase. After entering the coagulant tank, PAM is added to accelerate flocculation and precipitation, and the dosage is 10ppm. The evenly mixed wastewater enters the inclined plate sedimentation tank, relies on gravity sedimentation, and the upper clear liquid flows by gravity into the pH adjustment tank, and the pH of the wastewater is adjusted by adding dilute sulfuric acid. The effluent from the process is used as the recycled water of the elution liquid. The effluent at the end of the elution enters the membrane treatment device, and is temporarily stored in the clear water tank after being filtered by the nanofiltration membrane. At the same time, the water in the clear water tank can be used for backwashing the nanofiltration membrane, and can be discharged after finally meeting the discharge standards. The sludge in the sedimentation tank is discharged into the sludge collection tank, and is regularly transported for treatment after being filtered and dried. The filtrate is collected and enters the aeration adjustment tank.

[0037] In summary, the agent used in the utility model has little impact on the environment, does not produce toxic and harmful gases, and is more environmentally friendly on the premise of ensuring the removal effect of heavy metals in the eluate. The membrane treatment device can be used to deeply treat the final discharged water, effectively intercept heavy metal ions, and ensure that the discharge meets the standards. The height difference is used to form partial gravity flow, such as between the three-stage gravity sedimentation tank, pH adjustment tank and flocculation tank, and coagulation aid tank, to reduce energy consumption and save costs.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A recycling and treatment device for contaminated soil eluent, comprising a reaction tank (1), characterized in that: The reaction pool (1) is fixedly connected to a fixing frame (2), and the fixing frame (2) is provided with a mixing mechanism (3) and a feeding mechanism (4); The feeding mechanism (4) comprises a medicine delivery barrel (41) fixedly connected to a fixed frame (2) and an inclined surface block (42) arranged on a mixing mechanism (3); the medicine delivery barrel (41) is fixedly connected to a connecting frame (43); a straight rod (45) is connected to the connecting frame (43) via a reset mechanism (44); a first cross bar (46) and a second cross bar (47) are fixedly connected to the straight rod (45); one end of the straight rod (45) is fixedly connected to a truncated cone block (48); the bottom of the truncated cone block (48) is fixedly connected to a cylinder (49) used in conjunction with the inclined surface block (42); the bottom of the cylinder (49) is arranged to be inclined.

2. The recycling and treatment device for contaminated soil eluent according to claim 1 is characterized in that: The mixing mechanism (3) comprises a motor (31) fixedly connected to a fixing frame (2); an output end of the motor (31) is fixedly connected to a rotating shaft (32); one end of the rotating shaft (32) passes through the fixing frame (2) and extends into the reaction pool (1); a mixing plate (33) is fixedly connected to the rotating shaft (32).

3. The recycling and treatment device for contaminated soil eluent according to claim 1 is characterized in that: The reset mechanism (44) comprises a baffle (441) fixedly connected to the other end of the straight rod (45) and a spring (442) sleeved on the straight rod (45); the spring (442) is respectively fixedly connected to the baffle (441) and the connecting frame (43).

4. The recycling and treatment device for contaminated soil elution according to claim 3 is characterized in that: A screw rod (5) is threadedly connected to the connecting frame (43), and a circular plate (6) is fixedly connected to the screw rod (5).

5. The recycling and treatment device for contaminated soil elution according to claim 4 is characterized in that: The circular plate (6) is located below the baffle plate (441), and the circular plate (6) and the baffle plate (441) are in close contact with each other.

6. The recycling and treatment device for contaminated soil elution according to claim 2 is characterized in that: A connecting rod (7) is fixedly connected to the rotating shaft (32), and the connecting rod (7) is fixedly connected to the inclined surface block (42).

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