Microporous aeration disc sludge starting silt falling test device and method

Abstract

The invention discloses a micropore aeration disc sludge starting silt falling test device and method, and belongs to the technical field of test devices. A micropore aeration disc silt starting silt falling test device comprises a base and further comprises a cylindrical water tank arranged at the top of the base and used for containing a water body and silt; the aeration main body is fixedly arranged at the bottom of the cylindrical water tank and is used for starting sludge at the bottom of the cylindrical water tank; the air outlet end of the inflation equipment is connected with an air guide pipe, and the end, away from the inflation equipment, of the air guide pipe penetrates through the bottom of the cylindrical water tank and is connected with the aeration main body; according to the method, the impact starting of the bubbles to the sludge is conveniently controlled, then the sludge sedimentation condition is observed and recorded, a certain basis can be provided for the multifunctional raking device to reduce the sludge by utilizing the bubbles, the feasibility of a bubble sludge reduction construction method is verified, and data support is provided for the parameter design of the multifunctional raking device.

Description

Technical Field

[0001] The invention relates to the technical field of test devices, and in particular to a microporous aeration disk sludge start-up and silt removal test device and method. Background Art

[0002] Affected by the sand transport along the coast and the rising and falling tides, the channel and the harbor are extremely silted. According to the design data, the annual siltation of the port is 9 million m3, with an average daily siltation of about 30,000 m3. According to the measurement data of the first phase of the project, when the average water depth of the channel and harbor is 6.3m, the average daily siltation in the construction area is 29,000 to 49,000 m3. Severe siltation not only causes great difficulties for construction, but also has a negative impact on the use and economic feasibility of the port.

[0003] In waterway dredging projects, excavation by suction dredgers is a commonly used construction method. In recent years, tugboat rakes have often been used in the shallowing stage of medium-hard soil dredging projects, achieving good construction results. However, the large amount of siltation in the waterway causes great difficulties in construction, and as the water depth increases, the effect of using the ebb tide to transport sand will weaken, and the cost of silting by suction dredgers will increase. Existing suction dredgers generally use bubbles to start the silt and cooperate with the ebb tide to reduce siltation. However, there is still a lack of certain basis for the multifunctional rake to reduce siltation by using bubbles, and it is impossible to verify the feasibility of the bubble siltation reduction method and provide data support for the parameter design of the multifunctional rake. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a microporous aeration disk sludge start-up and silt removal test device and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A microporous aeration disk sludge start-up and silt removal test device, comprising a base, and also comprising:

[0007] A cylindrical water tank, which is arranged on the top of the base and is used to store water and sludge;

[0008] An aeration body, which is fixed at the bottom of the cylindrical water tank and is used to start the sludge at the bottom of the cylindrical water tank;

[0009] An aeration device, wherein an air outlet end of the aeration device is connected to an air guide pipe, and an end of the air guide pipe away from the aeration device passes through the bottom of the cylindrical water tank and is connected to the aeration body; and

[0010] The auxiliary unloading mechanism is detachably arranged on the top of the cylindrical water tank and is used for lowering water and sludge.

[0011] Preferably, a concave hole is opened at the center of the bottom of the cylindrical water tank, and a sealing colloid is filled between the concave hole and the air guide pipe and between the air guide pipe and the aeration body, and the sealing colloid is a two-component epoxy resin glue.

[0012] Preferably, the auxiliary unloading mechanism includes a placing rack arranged on the top of the cylindrical water tank, the placing rack is provided with a movable hole, a unloading pipe is movably arranged in the movable hole, the top and bottom of the unloading pipe are respectively connected to a conical hopper and a distribution pipe, a plurality of unloading ports are opened at the bottom of the distribution pipe, and the distribution pipe is vertically arranged to the unloading pipe.

[0013] Preferably, both ends of the placement rack are provided with slide grooves, each of the slide grooves is slidably connected with a slider, a first elastic element is provided between the slider and the inner wall of the slide groove, and a contact plate that movably abuts against the inner wall of the cylindrical water tank is provided at the bottom of the slider.

[0014] Preferably, a spiral track groove is provided on the outer side of the feed tube along its axial direction, and a positioning block is fixedly provided on the inner wall of the movable hole, and the positioning block is slidably connected to the spiral track groove.

[0015] Preferably, the fabric tube is made of a plastic material with high buoyancy.

[0016] Preferably, the cylindrical water tank is provided with water level scale lines from top to bottom, a test water outlet is opened on the side wall of the cylindrical water tank, and a plug cover is provided at the test water outlet.

[0017] Preferably, the aeration body adopts a Φ215 rubber aeration disk, and the ventilation volume of the aeration disk is 2 to 5 m 3 / h / pieces.

[0018] Preferably, the diameter of the cylindrical water tank is set to 25 cm, and the inflation device is an air pump.

[0019] The present invention also discloses a microporous aeration disk sludge start-up and silt removal test method, using a microporous aeration disk sludge start-up and silt removal test device, characterized in that it also includes the following steps:

[0020] S1: First, use a hand drill to drill a hole at the bottom of the cylindrical water tank, insert the air guide pipe of the aeration device into the cylindrical water tank and connect it to the aeration body, and use a sealing colloid to seal the concave hole and the air guide pipe, as well as the air guide pipe and the aeration body;

[0021] S2: Clean water aeration test: Pour clean water into a cylindrical water tank, use an aeration device to fill air into the aeration body, observe the morphological characteristics of bubbles generated by the aeration disk in the water, and measure the rising speed of the bubbles in the water after they are generated;

[0022] S3: Silt start-up test:

[0023] 1. After pouring out the clean water in the cylindrical water tank, the silt and seawater are sequentially lowered through the auxiliary feeding mechanism; the thickness of the silt laid at the bottom of the cylindrical water tank is 4-6mm, and the silt concentration in the cylindrical water tank is calculated at this time. After the silt has settled in the water body of the cylindrical water tank, the first round of tests begins;

[0024] Fill the aeration plate with enough air through the aeration equipment. The aeration plate will produce uniform bubbles after being aerated, lift the sludge on the aeration plate surface, observe the sludge start-up and the natural sedimentation after the sludge is fully started, measure the distance between the clear and turbid surface and the water surface at different sedimentation times, and calculate the sedimentation speed;

[0025] 2. Continue to pump air to mix the sludge and water evenly, then open the test outlet to make the fluid in the cylindrical water tank automatically flow out half of the sludge, add the sampled seawater to the original water surface line, pump air to mix the water and sludge evenly, take samples and weigh them, and calculate the sludge concentration of the water in the cylindrical water tank at this time;

[0026] After static sedimentation, use the aeration equipment to start the sludge to the aeration plate again, check the aeration plate's starting condition of the sludge, measure the distance between the clear and turbid surface and the water surface at different sedimentation times, and calculate the silt falling speed;

[0027] 3. Repeat the above steps, aerate the sludge and water to mix evenly, take out half of the sludge, and then pour in the sampled seawater to keep the water surface line consistent with the previous one. After measuring the sludge concentration, fill the aeration plate with enough air to start the sludge, and observe the sludge starting situation of this round and the previous two rounds;

[0028] 4. After standing and settling, stir the upper layer of water to mobilize some small particles of silt in the lower layer. Then remove the upper layer of water and add seawater sampled on site. Repeat this process several times and observe the clear and turbid surface in the cylindrical water tank.

[0029] Compared with the prior art, the present invention provides a microporous aeration disk sludge start-up and siltation test device and method, which has the following beneficial effects:

[0030] 1. The microporous aeration disk sludge mobilization and sedimentation test device and method inflates the aeration body through the inflation device, and the aeration body activates the sludge in the cylindrical water tank. The staff observes and records the sludge mobilization and sedimentation. It can provide a certain basis for the multifunctional rake to reduce silt by using bubbles, verify the feasibility of the bubble silt reduction method, and provide data support for the parameter design of the multifunctional rake.

[0031] 2. The microporous aeration plate sludge starting and silt dropping test device and method can evenly drop the sludge on the lower side of the cylindrical water tank through the auxiliary feeding mechanism, ensuring that when the bubbles start the sludge, the sludge is quickly mixed with the water in the cylindrical water tank, and when the auxiliary feeding mechanism drops the water into the cylindrical water tank, the impact on the bottom sludge is reduced, so that the sludge will not be greatly disturbed, and then when the sludge starting test is first tested, the sludge can quickly complete the sedimentation work in the cylindrical water tank, so that the sludge starting test can be quickly carried out for the first time, thereby improving the test efficiency and test effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0034] Figure 3 For the present invention Figure 2 A partial enlarged structural diagram of the middle part;

[0035] Figure 4 It is a structural schematic diagram of the feeding pipe of the present invention;

[0036] Figure 5 The structure of the rack of the present invention is shown in FIG. Figure 1 ;

[0037] Figure 6 The structure of the rack of the present invention is shown in FIG. Figure 2 ;

[0038] Figure 7 It is a schematic diagram of the structure of the exterior of the feed tube of the present invention.

[0039] In the figure: 1. base; 2. cylindrical water tank; 201. concave hole; 202. sealing colloid; 203. water level mark; 3. aeration body; 4. inflation device; 401. air guide tube; 5. placement rack; 501. movable hole; 5011. positioning block; 502. discharge pipe; 503. conical hopper; 504. distribution pipe; 5041. discharge port; 6. slide; 601. slider; 602. first elastic element; 603. abutment plate; 7. spiral track groove; 8. test water outlet; 801. plug cover; 9. silt layer. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Example: Refer to Figure 1-7 A microporous aeration disk sludge start-up and silt removal test device comprises a base 1 and also comprises:

[0044] A cylindrical water tank 2, which is arranged on the top of the base 1 and is used to store water and silt;

[0045] The aeration body 3 is fixedly arranged at the bottom of the cylindrical water tank 2 and is used to start the sludge at the bottom of the cylindrical water tank 2;

[0046] An aeration device 4, wherein an air outlet end of the aeration device 4 is connected to an air guide pipe 401, and an end of the air guide pipe 401 away from the aeration device 4 passes through the bottom of the cylindrical water tank 2 and is connected to the aeration body 3; and

[0047] The auxiliary unloading mechanism is detachably arranged on the top of the cylindrical water tank 2 and is used for lowering water and sludge.

[0048] Furthermore, the aeration body 3 adopts a Φ215 rubber aeration disk, and the ventilation volume of the aeration disk is 2 to 5m 3 / h / pieces.

[0049] Furthermore, the diameter of the cylindrical water tank 2 is set to 25 cm, and the inflation device 4 is an air pump.

[0050] Specifically, by placing clean water alone in the cylindrical water tank 2, the aeration device 4 uses the air guide pipe 401 to inflate the aeration body 3, and it is observed that the aeration disc expands briefly after being inflated, and then small bubbles appear evenly on the entire disc surface and diffuse in the water. After the bubbles are generated on the disc surface, they gradually diffuse to the surroundings during the rising process until they cover the entire cross section in the diameter direction of the cylindrical water tank 2. This part of the experiment mainly observes the morphological characteristics of bubbles generated by the aeration disc in water, and measures the rising speed of the bubbles in water after they are generated;

[0051] Subsequently, after pouring out the clean water in the cylindrical water tank 2, the silt and seawater are lowered in turn through the auxiliary feeding mechanism to carry out the silt starting test. The main purpose is to determine the starting effect of bubbles on silt of different concentrations, and the sedimentation of silt of different concentrations after bubble starting, so as to provide a certain basis for the multifunctional rake to reduce silt by bubbles, verify the feasibility of the bubble silt reduction method, and provide data support for the parameter design of the multifunctional rake.

[0052] Reference Figure 1-2 As a preferred technical solution of the present invention, a concave hole 201 is opened at the bottom center of the cylindrical water tank 2, and a sealing colloid 202 is filled between the concave hole 201 and the air guide tube 401 and between the air guide tube 401 and the aeration body 3. The sealing colloid 202 is a two-component epoxy resin glue.

[0053] Specifically, the staff drills a hole at the bottom of the cylindrical water tank 2 with a hand drill, inserts the air guide tube 401 of the inflation device 4 into the cylindrical water tank 2 and connects it to the aeration body 3, and uses the sealing colloid 202 to seal between the recessed hole 201 and the air guide tube 401 as well as between the air guide tube 401 and the aeration body 3 to prevent air and water leakage, thereby ensuring the normal progress of the test and the accuracy of the test data.

[0054] Reference Figure 1-7 As a preferred technical solution of the present invention, the auxiliary unloading mechanism includes a placement rack 5 arranged on the top of the cylindrical water tank 2, and a movable hole 501 is opened on the placement rack 5. A unloading pipe 502 is movably arranged in the movable hole 501. The top and bottom of the unloading pipe 502 are respectively connected to a conical hopper 503 and a distribution pipe 504. A plurality of unloading ports 5041 are opened at the bottom of the distribution pipe 504, and the distribution pipe 504 is vertically arranged with the unloading pipe 502.

[0055] Specifically, the staff places the feed pipe 502 in the cylindrical water tank 2 through the placement rack 5, and the distribution pipe 504 at the bottom of the feed pipe 502 is placed at the bottom of the cylindrical water tank 2. Then the staff pours a certain amount of sludge from the conical hopper 503, and the sludge falls along the feed pipe 502 and the distribution pipe 504 in turn, and finally falls from the feed port 5041 at the bottom of the distribution pipe 504 to the bottom of the cylindrical water tank 2. The sludge is laid with a thickness of 4-6 mm. During the falling of the sludge, the staff rotates the feed pipe 502, so that the feed pipe 502 drives the distribution pipe 504 to rotate, and then the sludge is evenly placed on the lower side of the cylindrical water tank 2, ensuring that when the bubbles start the sludge, the sludge is quickly mixed with the water in the cylindrical water tank 2.

[0056] After the silt is laid, the staff pours the sampled seawater into the conical hopper 503, and the seawater falls along the discharge pipe 502. Since the discharge pipe 502 and the distribution pipe 504 are placed at an angle, the flow rate of the water flowing from the discharge pipe 502 to the distribution pipe 504 is slowed down, and since the distribution pipe 504 is initially at the bottom of the cylindrical water tank 2, the water flowing out from the discharge port 5041 has a smaller impact force on the silt at the bottom, thereby preventing the silt at the bottom of the cylindrical water tank 2 from being dispersed, and as the cylindrical water tank 2 is The increase of water in the water tank 2 increases the height of the distribution pipe 504 in the cylindrical water tank 2, so that the discharge port 5041 at the bottom of the distribution pipe 504 is always flush with the water surface. The seawater flowing out of the distribution pipe 504 impacts the water surface, which prevents the falling seawater from continuously impacting the silt at the bottom of the cylindrical water tank 2. Therefore, during the initial test of the silt starting test, the silt can quickly complete the sedimentation work in the cylindrical water tank 2, so that the silt starting test can be quickly carried out for the first time, thereby improving the test efficiency and test effect.

[0057] Reference Figure 1 , Figure 2 , Figure 5 and Figure 6 As a preferred technical solution of the present invention, both ends of the placement rack 5 are provided with slide grooves 6, each slide groove 6 is slidably connected with a slider 601, a first elastic element 602 is arranged between the slider 601 and the inner wall of the slide groove 6, and a contact plate 603 that movably abuts against the inner wall of the cylindrical water tank 2 is arranged at the bottom of the slider 601.

[0058] Specifically, by elastically setting the abutment plate 603 on the placement rack 5, the abutment plates 603 at both ends of the placement rack 5 abut against the inner wall of the cylindrical water tank 2, so that the placement rack 5 is stably placed on the top of the cylindrical water tank 2, which facilitates the smooth operation of the auxiliary unloading mechanism, and the placement rack 5 is suitable for testing cylindrical water tanks 2 of different sizes.

[0059] Reference Figure 1-7As a preferred technical solution of the present invention, a spiral track groove 7 is opened along the axial direction of the outer side of the feed tube 502, and a positioning block 5011 is fixed on the inner wall of the movable hole 501, and the positioning block 5011 is slidably connected to the spiral track groove 7.

[0060] Furthermore, the fabric tube 504 is made of a plastic material with high buoyancy.

[0061] Specifically, after the silt is laid, the staff pours the sampled seawater into the conical hopper 503, and the seawater falls along the discharge pipe 502. Since the discharge pipe 502 and the distribution pipe 504 are placed at an angle, the flow rate of the water flowing from the discharge pipe 502 to the distribution pipe 504 is slowed down, and since the distribution pipe 504 is initially at the bottom of the cylindrical water tank 2, the water flowing out from the discharge port 5041 has a small impact on the silt at the bottom, thereby preventing the silt at the bottom of the cylindrical water tank 2 from being washed away. As the water in the cylindrical water tank 2 increases, the distribution pipe 504 moves upward under the action of its own buoyancy, and the discharge port 5041 at the bottom of the distribution pipe 504 is always flush with the water surface, and the distribution pipe 504 flows The outgoing seawater impacts the water surface, avoiding the continuous impact of the falling seawater on the silt at the bottom of the cylindrical water tank 2. During the period when the distribution pipe 504 drives the discharge pipe 502 to move upward, the spiral track groove 7 cooperates with the positioning block 5011 to drive the distribution pipe 504 to rotate during the upward movement of the discharge pipe 502, thereby avoiding the seawater discharged from the discharge port 5041 at the bottom of the distribution pipe 504 to always impact the silt on the bottom side of the cylindrical water tank 2 at the beginning, resulting in a large impact on the silt at the bottom of the cylindrical water tank 2, making the silt at the bottom of the cylindrical water tank 2 unevenly distributed, affecting the subsequent mixing efficiency and uniformity of the silt with the water body when it is started by the impact of bubbles, thereby ensuring the test efficiency and test effect.

[0062] Reference Figure 1 and Figure 2 As a preferred technical solution of the present invention, the cylindrical water tank 2 is provided with water level scale lines 203 from top to bottom, the side wall of the cylindrical water tank 2 is provided with a test water outlet 8, and a plug cover 801 is provided at the test water outlet 8.

[0063] Specifically, by opening a test water outlet 8 on the side of the cylindrical water tank 2, when multiple rounds of tests are carried out subsequently, by opening the plug cover 801, half of the mud in the cylindrical water tank 2 is automatically discharged without the need for manual removal by the staff, thereby reducing the workload and work difficulty of the staff and improving the test efficiency.

[0064] The specific operation process of this application is as follows:

[0065] S1: First, a hole is drilled at the bottom of the cylindrical water tank 2 with a hand drill, and the air guide tube 401 of the aeration device 4 is inserted into the cylindrical water tank 2 and connected to the aeration body 3, and the sealing colloid 202 is used to seal the concave hole 201 and the air guide tube 401, and the air guide tube 401 and the aeration body 3;

[0066] S2: Clean water aeration test: Pour clean water into the cylindrical water tank 2, and use the aeration device 4 to fill air into the aeration body 3. It is observed that the aeration disk expands briefly after being inflated, and then small bubbles appear evenly on the entire disk surface and diffuse in the water;

[0067] After the bubbles are generated on the disk surface, they gradually diffuse to the surroundings during the rising process until they cover the entire cross section in the diameter direction of the cylindrical water tank 2;

[0068] This part of the test mainly observes the morphological characteristics of bubbles generated by the aeration disk in the water, and measures the rising speed of the bubbles in the water after they are generated;

[0069] S3: sludge start-up test: after pouring out the clean water in the cylindrical water tank 2, the sludge and seawater are sequentially lowered through the auxiliary unloading mechanism. When performing the sludge start-up test, the auxiliary unloading mechanism at the cylindrical water tank 2 is removed;

[0070] 1. The thickness of the sludge laid at the bottom of the cylindrical water tank 2 is 4-6 mm. At this time, the sludge concentration in the cylindrical water tank 2 is 74.2 kg / m 3 ,After the sludge has settled in the water body of the cylindrical water tank 2, the first round of tests begins;

[0071] Sufficient gas is charged into the aeration disk through the aeration device 4, and the aeration disk generates uniform bubbles after being charged, which lifts the sludge on the aeration disk surface;

[0072] When the aeration starts, you can clearly see the silt being lifted to the upper clear water, then the silt and water gradually mix, until they are fully mixed into a solid-liquid two-phase flow slurry. At the same time, you can also observe obvious phenomena on the water surface. When the silt content in the upper water body is not much at the beginning, you can see obvious flocs, then more silt mixes with the upper water body, and uniform bubbles appear on the water surface;

[0073] After the sludge is fully started, it settles naturally in the cylindrical water tank 2. The distance between the clear and turbid surface and the water surface is measured at different settling times to calculate the silt settling speed;

[0074] After 26 hours of waiting for sedimentation, the aeration device was used to start the sludge to the aeration plate again. The aeration plate surface was checked and the aeration plate surface was 74.2 kg / m 3 At a concentration of , the aeration disk can fully activate the sludge that has settled for 26 hours;

[0075] 2. Continue to pump air to mix the sludge and water evenly, open the test water outlet 8, let half of the sludge in the cylindrical water tank 2 flow out automatically, add the sampled seawater to the original water surface line, pump air to mix the water and sludge evenly, take samples and weigh them, and calculate that the sludge concentration in the water at this time is about 52.6kg / m 3 ;

[0076] After 29 hours of static sedimentation, the aeration device 4 was used to start the sludge in the aeration plate again. The surface of the aeration plate was checked. At a concentration of 52.6 kg / m3, the aeration plate could not completely start the sludge that had settled for 29 hours, and a small amount of viscous sludge remained on the plate surface.

[0077] 3. Repeat the above steps, aerate the sludge and water to mix evenly, take out half of the sludge, and then pour the sampled seawater to keep the water surface line consistent with the previous one. Measure the sludge concentration and fill the aeration plate with enough air to start the sludge. The sludge concentration in the water is about 26.8kg / m 3 At the concentration of this round of test, there is no obvious clear and turbid surface in the initial period of time like in the first two rounds of tests, but a concentration gradient area appears. After 2 hours of sedimentation, an obvious clear and turbid surface appears.

[0078] 4. After 19 hours of natural sedimentation, the upper layer of water was stirred to mobilize some small particles of silt in the lower layer. Then the upper layer of water was taken out and seawater sampled on site was added. This was repeated several times and an obvious clear and turbid surface was found. A double-layer interface with a width of 2 to 3 mm appeared between the lower silt and the upper layer of water.

[0079] Based on the above experimental observations and results, and after reasonable speculation, the following conclusions are drawn:

[0080] 1. Micro bubbles can mix silt and water into a solid-liquid two-phase flow, which has a certain effect on reducing siltation in waterways;

[0081] 2. Under different sludge concentrations, the sedimentation rate showed obvious differences, which was generally shown as the lower the concentration, the faster the sedimentation. It is speculated that the reason for this phenomenon is that when the concentration is high, the sludge particles support each other, which slows down the sedimentation;

[0082] 3. The bubbles can fully activate the floating mud that has returned to sediment within 24 hours. For the mud that has been deposited for more than 24 hours, most of it can be activated, but a small part will adhere to the aeration plate and be difficult to activate.

[0083] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A microporous aeration disk sludge start-up and silt removal test device, comprising a base (1), characterized in that: Also includes: A cylindrical water tank (2), the cylindrical water tank (2) being arranged on the top of the base (1) and being used for storing water and sludge; an aeration body (3), the aeration body (3) being fixedly arranged at the bottom of the cylindrical water tank (2) and used for actuating the sludge at the bottom of the cylindrical water tank (2); an aeration device (4), wherein an air outlet end of the aeration device (4) is connected to an air guide pipe (401), and an end of the air guide pipe (401) away from the aeration device (4) passes through the bottom of the cylindrical water tank (2) and is connected to the aeration body (3); and The auxiliary material discharge mechanism is detachably arranged on the top of the cylindrical water tank (2) and is used for the discharge of water and sludge.

2. A microporous aeration disk sludge start-up and silt removal test device according to claim 1, characterized in that: A concave hole (201) is provided at the center of the bottom of the cylindrical water tank (2), and a sealing colloid (202) is filled between the concave hole (201) and the air guide tube (401) and between the air guide tube (401) and the aeration body (3), wherein the sealing colloid (202) is a two-component epoxy resin glue.

3. A microporous aeration disk sludge start-up and silt removal test device according to claim 2, characterized in that: The auxiliary unloading mechanism comprises a placing frame (5) arranged on the top of the cylindrical water tank (2), the placing frame (5) is provided with a movable hole (501), a unloading pipe (502) is movably arranged in the movable hole (501), the top and bottom of the unloading pipe (502) are respectively connected to a conical hopper (503) and a distribution pipe (504), the bottom of the distribution pipe (504) is provided with a plurality of unloading ports (5041), and the distribution pipe (504) is arranged vertically to the unloading pipe (502).

4. A microporous aeration disk sludge start-up and silt removal test device according to claim 3, characterized in that: Both ends of the placement rack (5) are provided with sliding grooves (6), each of the sliding grooves (6) is slidably connected with a slider (601), a first elastic element (602) is provided between the slider (601) and the inner wall of the sliding groove (6), and a contact plate (603) is provided at the bottom of the slider (601) for movably contacting with the inner wall of the cylindrical water tank (2).

5. A microporous aeration disk sludge start-up and silt removal test device according to claim 4, characterized in that: The outer side of the feeding tube (502) is provided with a spiral track groove (7) along its axial direction, and the inner wall of the movable hole (501) is fixedly provided with a positioning block (5011), and the positioning block (5011) is slidably connected to the spiral track groove (7).

6. A microporous aeration disk sludge start-up and silt removal test device according to claim 5, characterized in that: The fabric tube (504) is made of a plastic material with high buoyancy.

7. A microporous aeration disk sludge start-up and silt removal test device according to claim 6, characterized in that: The cylindrical water tank (2) is provided with water level scale lines (203) from top to bottom, and a test water outlet (8) is opened on the side wall of the cylindrical water tank (2), and a plug cover (801) is provided at the test water outlet (8).

8. A microporous aeration disk sludge start-up and silt removal test device according to claim 7, characterized in that: The aeration body (3) adopts a Φ215 rubber aeration disk, and the ventilation volume of the aeration disk is 2 to 5 m 3 / h / pieces.

9. A microporous aeration disk sludge start-up and silt removal test device according to claim 8, characterized in that: The diameter of the cylindrical water tank (2) is set to 25 cm, and the inflation device (4) is an air pump.

10. A microporous aeration disk sludge start-up and silt removal test method, using a microporous aeration disk sludge start-up and silt removal test device as claimed in claim 9, characterized in that: The following steps are also included: S1: First, a hole is drilled at the bottom of the cylindrical water tank (2) with a hand drill, and the air guide tube (401) of the aeration device (4) is inserted into the cylindrical water tank (2) and connected to the aeration body (3), and the concave hole (201) and the air guide tube (401) and the air guide tube (401) and the aeration body (3) are sealed with a sealing colloid (202); S2: Clean water aeration test: Pour clean water into the cylindrical water tank (2), use the aeration device (4) to fill air into the aeration body (3), observe the morphological characteristics of bubbles generated by the aeration disk in the water, and measure the rising speed of the bubbles in the water after they are generated; S3: Silt start-up test:

1. After pouring out the clean water in the cylindrical water tank (2), the silt and seawater are sequentially lowered through the auxiliary material discharge mechanism; the thickness of the silt laid at the bottom of the cylindrical water tank (2) is 4-6 mm, and the silt concentration in the cylindrical water tank (2) is calculated at this time. After the silt has settled in the water body of the cylindrical water tank (2), the first round of test begins; A sufficient amount of air is charged into the aeration plate through the aeration device (4), and the aeration plate generates uniform bubbles after the aeration, which lifts the sludge on the aeration plate surface, and observes the sludge start-up and the natural sedimentation of the sludge after the sludge is fully started. At different sedimentation times, the distance between the clear and turbid surface and the water surface is measured to calculate the sedimentation speed; 2. Continue to pump air to mix the sludge and water uniformly, then open the test water outlet (8) to allow half of the sludge to flow out of the cylindrical water tank (2) automatically, add the sampled seawater to the original water surface line, pump air to mix the water and sludge uniformly, take a sample and weigh it, and calculate the sludge concentration of the water in the cylindrical water tank (2) at this time; After static settling, the sludge is again moved to the aeration plate by the aeration device (4), and the aeration plate is checked for the sludge movement. The distance between the clear and turbid surface and the water surface is measured at different settling times to calculate the silt falling speed.

3. Repeat the above steps, aerate the sludge and water to mix evenly, take out half of the sludge, and then pour in the sampled seawater to keep the water surface line consistent with the previous one. After measuring the sludge concentration, fill the aeration plate with enough air to start the sludge, and observe the sludge starting situation of this round and the previous two rounds; Fourth, after allowing to settle, stir the upper water layer to agitate the small silt particles in the lower layer, then remove the upper water layer and add seawater sampled on site. Repeat this process several times and observe the clear and turbid surface conditions in the cylindrical water tank (2).

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