Pre-construction test device for sludge consolidation treatment

Abstract

The utility model relates to a pre-construction test device for sludge consolidation treatment, and relates to the technical field of sludge treatment. The pre-construction test device comprises a sludge conveying pump pipe, a medicine proportioning assembly, a medicine and sludge mixing device and a consolidation assembly. The medicine sludge mixing device comprises a double-cone-barrel static mixer and a liquid medicine output main pipeline. The double-cone-barrel static mixer is a columnar barrel with two ends gradually shrunk, one end of the double-cone-barrel static mixer is communicated with a sludge conveying pump pipe through a flange port, and the other end of the double-cone-barrel static mixer is communicated with a W-shaped mixer through a flange port. The medicine enters the middle area of the double-cone-barrel static mixer and then is mixed with sludge flowing in the double-cone-barrel static mixer in a flushing and injecting mode, after the mixed medicine liquid enters the W-shaped mixer, due to the fact that the W-shaped mixer is provided with a plurality of bent pipelines, the W-shaped mixer has the effect of decelerating and retaining the medicine liquid and sludge mixture, the effect of the medicine liquid on the sludge is more sufficient, and the effect of the medicine liquid on the sludge is improved. The mixing flocculation reaction effect and quality are improved, the data accuracy during pre-construction test detection is improved, and the accurate medicine proportion is obtained.

Description

Technical Field

[0001] The present application relates to the field of sludge treatment, and in particular to a pre-work test device for sludge consolidation treatment. Background Art

[0002] Due to various ecological pollution, silt accumulates in rivers and lakes, causing water quality to deteriorate. In order to purify the sludge, a floating sludge field is used to pump out and treat the silt in rivers and lakes. The main construction content of the dehydration and consolidation of the floating sludge field includes: the lake bottom sludge is dredged by an environmentally friendly suction dredger, transported to the floating sludge field through the sludge pipe for geotextile tube bag blowing and filling, and the dry mud dehydrated and consolidated by the tube bag is used in situ to construct lakeside wetlands, and the resources are reused in wetland ecological restoration, and the tail water is purified and treated to meet the discharge standards.

[0003] However, due to the complex environment of rivers and lakes, the water quality of different rivers and lakes is different, and the mud quality of silt at different depths is different. Therefore, in different situations, the drug ratios used are different. In order to ensure the silt consolidation effect during actual operation, it is necessary to conduct pre-construction experiments on silt of different water quality and depth to obtain the required accurate construction data; however, due to the limitations of the surrounding environment and the site of use, there is a lack of equipment that can effectively simulate the silt consolidation test to obtain more accurate data on the drug ratio.

[0004] There is currently no effective solution to the problem of lack of a device that can effectively simulate sludge consolidation and obtain a more accurate drug ratio through the device. Utility Model Content

[0005] The utility model provides a pre-work test device for sludge consolidation treatment to solve the problem of lack of a device that can effectively simulate sludge consolidation to obtain drug ratio.

[0006] The utility model provides a pre-work test device for sludge consolidation treatment, comprising a sludge conveying pump pipe, a drug proportioning component, a drug-sludge mixing device and a consolidation component. The sludge conveying pump pipe is used to extract sludge. The drug proportioning component is used to provide drugs in different proportions. The drug-sludge mixing device comprises a double-cone barrel static mixer and a main pipeline for outputting drug liquid. The double-cone barrel static mixer is a cylindrical cylinder with gradually contracted ends, one end of which is connected to the sludge conveying pump pipe through a flange port, and the other end is connected to a W-type mixer through a flange port. One end of the main pipeline for outputting drug liquid is connected to the drug proportioning component, and the other end is connected to a relay drug delivery booster pump. One end of the relay drug delivery booster pump is connected to a cantilevered multi-porous drug delivery pipe, and the multiple holes of the cantilevered multi-porous drug delivery pipe are connected to the middle of the double-cone barrel static mixer through multiple soft drug delivery short tubes. The consolidation component is connected to the W-type mixer for collecting the sludge-drug liquid mixture and placing it for consolidation.

[0007] In some of the embodiments, the outer wall of the columnar barrel is conical at both ends and cylindrical in the middle. A plurality of sealing interfaces are arranged on the middle outer wall of the columnar barrel, and the plurality of sealing interfaces are used to connect to a short soft drug delivery tube.

[0008] In some of the embodiments, the drug proportioning assembly includes a water supply pump pipe, a drug adding and dissolving mixing tank, and a fixed working platform plus a ladder;

[0009] There are three dosing and dissolving mixing tanks arranged side by side, and fixed working platforms and ladders are installed on the three dosing and dissolving mixing tanks for operators to climb and work;

[0010] The water supply pump pipe supplies water to the three dosing and dissolving mixing tanks through a tee pipe or an elbow pipe. The outlet of each branch pipe of the water supply pump pipe is bent 90 degrees at the top of the dosing and dissolving mixing tank and connected to the tank. The lower parts of the outer walls of the three dosing and dissolving mixing tanks are connected to the main pipeline for outputting the drug solution through pipelines, and gate valves and pressure gauges are respectively arranged at the nodes of the main pipeline for outputting the drug solution and each branch pipeline.

[0011] In some of the embodiments, a gate valve and a pressure gauge are provided at the inlet of the water supply pump pipe, which are used to open and close the water supply pump pipe and adjust the pressure of liquid delivery.

[0012] In some of the embodiments, the drug adding and dissolving mixing tank includes a tank body, a water level alarm, and a stirring motor unit and its paddles;

[0013] A water level alarm is arranged on the tank body to monitor the water level and sound an alarm when the water level overflows;

[0014] The stirring motor unit and its blades are installed on the tank body to stir the liquid in the tank body.

[0015] In some of the embodiments, the consolidation assembly includes a consolidation container and a mixture delivery pipe, one end of the mixture delivery pipe is connected to the W-type mixer, and the other end of the mixture delivery pipe is connected to the consolidation container.

[0016] In some of the embodiments, the consolidation container is a geotube bag, a filling port is provided on the geotube bag, and the other end of the mixture conveying pipe is connected to the filling port.

[0017] In some of the embodiments, the pre-construction test device further includes a geotube bag blowing and filling test area and an open ditch for residual water recovery;

[0018] The geotube bag blowing test site is set up on flat ground, and a number of residual water recovery open ditches are opened around the geotube bag blowing test site to discharge the residual water after the silt consolidation test.

[0019] In some of the embodiments, a gate valve and a flow meter are provided on the main pipeline for outputting the drug solution, which are used for opening and closing the main pipeline for outputting the drug solution and for flow control.

[0020] In some of the embodiments, the soft short drug delivery tube is a rubber hose.

[0021] The utility model provides a pre-work test device for sludge consolidation treatment, which has the following beneficial effects:

[0022] 1. The utility model utilizes a sludge delivery pump tube to extract sludge, and the sludge will pass through a double-cone barrel static mixer. At the same time, the main pipeline for outputting the drug liquid will pressurize the drug liquid mixed and proportioned by the drug proportioning component through a relay drug delivery pressure pump, and will be flushed into the middle area of ​​the double-cone barrel static mixer through a cantilevered multi-porous drug delivery tube and a plurality of soft drug delivery short tubes. After the drug enters the middle area of ​​the double-cone barrel static mixer, it will be flushed and mixed with the sludge flowing in the double-cone barrel static mixer, and under the action of the flushing drug liquid, the drug liquid and the sludge will generate vortexes, thereby achieving very sufficient and uniform mixing, so that the mixing reaction of the drug liquid and the sludge is in the best state, thereby greatly improving the accuracy of the detection result and obtaining a more accurate drug ratio.

[0023] 2. The utility model utilizes the double cone structure of the double cone barrel static mixer, so that when the sludge enters the double cone barrel static mixer, it is first dispersed by the first cone structure, and then the liquid medicine is injected and mixed with the flowing sludge, and then passes through the second cone structure again after mixing to concentrate the mixed liquid medicine sludge together, and the sludge and liquid medicine form a vortex mixing state in the double cone barrel static mixer. After the mixed liquid medicine enters the W-type mixer, since the W-type mixer has multiple bent pipes, it has the effect of slowing down and retaining the liquid medicine sludge mixture, which can increase the reaction time of the liquid medicine sludge mixture in the pipe. The device uses a two-stage mixing reaction, that is, double mixing and flocculation of the double cone barrel static mixer plus the W-type mixer, so that the liquid medicine has a more sufficient flocculation effect on the sludge, thereby effectively improving the effect and quality of the mixing flocculation reaction, and improving the data accuracy during the final detection of the pre-work test.

[0024] 3. The device adopted by the utility model has the advantages of easy installation, reasonable footprint, easy recycling and layout, and sustainable utilization. By reasonably dividing a geotube bag blowing test area next to the river or lake that needs to be tested, the device can be directly installed without the need to construct a large-scale testing site in advance, such as a cement testing ground or a steel scaffolding network, thereby avoiding the occupation of additional sites and environmental pollution caused by construction. It has the advantages of easy use and sustainable use.

[0025] 4. After mixing the medicinal liquid and sludge, the device of the utility model transports the mixture to a geotube bag through a mixture delivery pipe and retains the mixture to implement a consolidation test. The experimental data of this test can be obtained by subsequently observing the consolidation effect of the retained material in the geotube bag, thereby achieving the effect of effectively conducting a simulation test on sludge consolidation, solving the problem of the lack of a device that can effectively conduct a simulation test on sludge consolidation.

[0026] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 are top views of some embodiments of the device;

[0028] Figure 2 yes Figure 1 A three-dimensional diagram of the device in the middle;

[0029] Figure 3 yes Figure 2 A stereoscopic view of a Chinese medicine sludge mixing device.

[0030] In the figure: 1. Sludge delivery pump pipe; 2. Double cone barrel static mixer; 3. W-type mixer; 4. Dosing and dissolving mixing tank; 5. Water supply pump pipe; 6. Water level alarm; 7. Mixing motor unit and its blades; 8. Main pipeline for outputting drug solution; 9. Relay drug delivery booster pump; 10. Cantilevered porous drug delivery pipe; 11. Soft drug delivery short pipe; 12. Electrical control box; 13. Gate valve plus pressure gauge; 14. Fixed working platform plus ladder; 15. Geotube bag filling test area; 16. Geotube bag; 17. Filling port; 18. Mixture delivery pipe; 19. Open ditch for residual water recovery. DETAILED DESCRIPTION

[0031] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0032] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with general skills in the technical field to which this application belongs. The words "one", "a", "the", "these" and the like in this application do not indicate a quantitative limitation, and they may be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, "A and / or B" may mean: A exists alone, A and B exist at the same time, and B exists alone. Generally, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0033] In the embodiment of the utility model, a pre-work test device for sludge consolidation treatment is provided, please refer to Figures 1 to 3 The pre-construction test device includes a sludge conveying pump pipe 1, a drug proportioning component, a drug-sludge mixing device, a consolidation component, a geotube bag filling test area 15 and a residual water recovery open ditch 19.

[0034] It should be noted that there are two types of sludge: polluted sludge and clean sludge. Polluted sludge includes heavy metal sludge obtained by mixing some industrial wastewater with muddy water. These heavy metal-contaminated sludges can be solidified by drugs. Drugs include PAM and PAC. PAM is the abbreviation of polyacrylamide, which is a water-soluble polymer mainly used as a flocculant to reduce the friction resistance between liquids. PAM is divided into three types: anionic, cationic and non-ionic, which are suitable for different sewage or sludge treatment processes. PAC is the abbreviation of polyaluminium chloride, an inorganic polymer coagulant, mainly used for water treatment. It destroys the stability of small particles in the water, promotes collision and coagulation between particles, forms larger flocs, and facilitates solid-liquid separation. Both are environmentally friendly drugs commonly used in sludge treatment. By mixing the two drugs, a better sludge solidification effect can be obtained, but the specific ratio of what effect requires experiments to obtain more accurate data. After the heavy metal contaminated sludge is dehydrated and solidified in the geotube bag, it can be used in situ for the construction of lakeside wetlands. There is no need to transfer the geotube bag, and the resource is reused for wetland ecological restoration. While dealing with the pollution, the ecological environment of the lakeside wetland is repaired and improved. Clean sludge includes sludge that is not contaminated by heavy metals, such as mud in some paddy fields or ponds, and also includes some muddy water. Therefore, the device can be used not only for the test of contaminated sludge, but also for the test of any muddy material, and has a wide range of application scenarios.

[0035] Among them, the sludge conveying pump pipe 1 is used to extract sludge and transport it. The sludge conveying pump pipe 1 is a combination of a mud pump and a pipeline specially supplied for pre-construction testing of bag-filled consolidation sludge. Exemplarily, the pipeline is a DN120 cast iron pipe with a wall thickness of 7mm. The mud pump is placed in the mud pool of the primary sedimentation tank on land, and is used to extract mud into the pipeline to realize mud transmission. The mud outlet port of the pipeline is connected to the drug sludge mixing device. The receiving port flange of the double-cone barrel mixer is connected. The mud and water in the primary sedimentation tank on land are dredged from the river and lake dredging construction area by an environmentally friendly cutter suction dredger, and transported to the pool for temporary storage through the mud discharge pipe.

[0036] Another one, the drug proportioning component is used to provide drugs in different ratios.

[0037] In some of the embodiments, the drug proportioning component includes a water supply pump pipe 5, a drug adding and dissolving mixing tank 4 and a fixed working platform plus a ladder 14.

[0038] In the drug proportioning assembly of the above embodiment, there are three drug adding and dissolving mixing tanks 4 arranged side by side. The three drug adding and dissolving mixing tanks 4 can be divided into a first tank body, a second tank body and a third tank body, and can be used in a variety of ways:

[0039] In some embodiments, the first tank body of the three drug adding and dissolving mixing tanks 4 is used to mix two different drug liquids, the second tank body is used to place the first drug liquid, and the third tank body is used to place the second drug liquid. The second tank body and the third tank body respectively output a specific amount of drug liquid into the first tank body, and the two drug liquids are mixed by the stirring motor unit and its paddle 7 in the first tank body to obtain a mixed drug liquid. If different concentrations of drug liquids are to be obtained, the gate valves of the second tank body and the third tank body can be adjusted to adjust the amount of the two drug liquids added to adjust the mixing amount of the drug liquids in the first tank body, thereby achieving different concentration ratios. This method is conducive to rapid deployment and small-scale deployment.

[0040] In other embodiments, two kinds of liquid medicine are added to the first tank, the second tank, and the third tank respectively. When adding the liquid medicine, the two liquid medicines are directly introduced into the tanks respectively. And they are configured according to different ratios respectively. In this way, fast and large-scale drug preparation can be achieved, which is suitable for large-scale application scenarios.

[0041] For example, the dosing and dissolving mixing tank 4 is a cylindrical storage tank made of PE material, with a diameter of 1500mm, a height of 2000mm, and a wall thickness of about 8mm. As a storage tank for water and medicine, there are 3 groups, which are compactly arranged in parallel and fixed to the workstation by a fixed working platform and a ladder assembly. The dosing and dissolving mixing tank is equipped with 3 mixing units, which are installed on a steel fixed bracket just above its dosing port. The lower end of the mixing motor unit is a mixing blade connected by a steel bearing. Each tank body is also equipped with a water level alarm, a water supply pump pipe and a gate valve.

[0042] In the drug proportioning assembly, a fixed working platform plus a ladder 14 is installed on the three drug adding and dissolving mixing tanks 4 for operators to climb and work.

[0043] Further, the drug adding and dissolving mixing tank 4 includes a tank body, a water level alarm 6 and a stirring motor group and its paddle 7. The water level alarm 6 is arranged on the tank body to monitor the water level and sound an alarm when the water level overflows. The stirring motor group and its paddle 7 are installed on the tank body to stir the liquid in the tank body. The water level alarm 6, the stirring motor group and its paddle 7 can all be controlled by the electrical control box 12.

[0044] In the drug proportioning component, the water supply pump pipe 5 supplies water to three drug-adding and dissolving mixing tanks 4 through a tee pipe or an elbow pipe, and each branch pipe outlet of the water supply pump pipe 5 is bent at 90 degrees at the top of the drug-adding and dissolving mixing tank 4 and connected to the tank. The lower part of the outer wall of the three drug-adding and dissolving mixing tanks 4 is connected to the output drug liquid main pipeline 8 (used to transport the drug liquid to the drug sludge mixing device) through pipelines, and a gate valve plus pressure gauge 13 is respectively set at the node of the output drug liquid main pipeline 8 and each branch pipeline. The gate valve plus pressure gauge 13 includes a gate valve and a pressure gauge. The gate valve can be installed on each pipeline to realize the opening and closing of the pipeline, and the pressure gauge can measure whether the pressure of each pipeline is normal. A gate valve plus pressure gauge 13 is set at the inlet of the water supply pump pipe 5, which is used to open and close the water supply pump pipe 5 and adjust the pressure of liquid delivery.

[0045] For example, the water supply pump pipe 5 is composed of 3 groups of ordinary pressure water pumps and DN50mm PE water pipes, and its function is to provide water for the dosing and dissolving tank. A PE water supply main pipe is divided into DN50mm branches through a DN50mm tee pipe or elbow pipe to supply water to the three groups of dosing and dissolving mixing tanks 4. The outlet of the water supply pipe is bent at 90 degrees at the top of the storage tank and connected to the tank.

[0046] Also, see Figure 3 The drug-sludge mixing device includes a double-cone barrel static mixer 2 and a main pipeline 8 for outputting drug liquid. The double-cone barrel static mixer 2 is a cylindrical cylinder with gradually contracted ends, one end of which is connected to the sludge delivery pump pipe 1 through a flange port, and the other end is connected to a W-type mixer 3 through a flange port. The W-type mixer 3 is a multi-bend tubular structure. One end of the output drug liquid main pipeline 8 is connected to the drug proportioning component, and the other end is connected to a relay drug delivery booster pump 9. One end of the relay drug delivery booster pump 9 is connected to a cantilevered multi-porous drug delivery tube 10, and the multiple holes of the cantilevered multi-porous drug delivery tube 10 are connected to the middle of the double-cone barrel static mixer 2 through multiple soft drug delivery short tubes 11. The consolidation component is connected to the W-type mixer 3 for collecting the sludge-drug liquid mixture and placing it for consolidation.

[0047] Exemplarily, the double-cone barrel static mixer 2 is a container with cones at both ends (similar to two opposing "trumpet mouths") and a cylindrical barrel in the middle (the cylindrical barrel is the main compartment section of the static mixer). It is made of Q235B steel and connected by welding, with a wall thickness of 5mm. The flange port at one end receives the sludge pump pipe. The flange port at the other end is connected to the W wave mixer, and the diameter of the double-cone port is DN120. The diameter of the middle cylindrical barrel is DN300, and the length of the cylindrical barrel is 1000mm. Its surface will receive a soft drug delivery short tube, and the outlet of the short tube is connected to the steel nozzle tube embedded in the cylindrical barrel to form an interface. The nozzle of the steel nozzle tube penetrates deep into the double-cone barrel mixer, and the liquid medicine can be sprayed inward. The total length of the cone with flange port and the middle cylindrical barrel is about 1500mm.

[0048] The cantilever multi-hole drug delivery tube 10 is a pipe with a plurality of holes on a main tube, each hole is connected to a short soft drug delivery tube 11, and the short soft drug delivery tube 11 is a rubber tube.

[0049] In some embodiments of the drug-sludge mixing device, the outer wall of the columnar barrel is tapered at both ends, and the middle part is cylindrical. A plurality of sealing interfaces are arranged on the middle outer wall of the columnar barrel, and the plurality of sealing interfaces are used to connect the soft drug delivery short tube 11. The W-type mixer 3 is W-shaped in appearance, and has a plurality of tortuous channels inside, which can slow down the speed of sludge flow, thereby ensuring that the sludge and the drug solution can fully react. Among them, each pipeline of the plurality of soft drug delivery short tubes 11 is provided with a gate valve for convenient management of the opening and closing of the pipeline. A gate valve and a flowmeter 20 are arranged at the output drug solution main pipeline 8, which can control the liquid circulation of the output drug solution main pipeline 8, and monitor the outflow of the output drug solution main pipeline 8, so as to facilitate the collection and comparison of drug solution data after the test.

[0050] When in use, the sludge conveying pump pipe 1 extracts the sludge, and the sludge passes through the double-cone barrel static mixer 2. At the same time, the output medicine liquid main pipeline 8 will pressurize the medicine liquid mixed and proportioned by the medicine proportioning component through the relay medicine delivery pressure pump 9, and inject it into the middle area of ​​the double-cone barrel static mixer 2 through the cantilever porous medicine delivery tube 10 and multiple soft medicine delivery short tubes 11. After the medicine enters the middle area of ​​the double-cone barrel static mixer 2, it will be injected and mixed with the sludge flowing in the double-cone barrel static mixer 2, and under the action of the injected medicine liquid, the medicine liquid and the sludge will generate vortex, thereby achieving very sufficient and uniform mixing, so that the mixing reaction of the medicine liquid and the sludge is in the best state, thereby greatly improving the accuracy of the detection results and obtaining a more accurate drug ratio.

[0051] The double cone structure of the double cone barrel static mixer 2 allows the sludge to be first dispersed by the first cone structure when entering the double cone barrel static mixer 2, and then the liquid medicine is injected and mixed with the flowing sludge. After mixing, it passes through the second cone structure again to concentrate the mixed liquid medicine and sludge together. After the mixed liquid medicine enters the W-type mixer 3, since the W-type mixer 3 has multiple bent pipes, it has the effect of slowing down and retaining the liquid medicine and sludge mixture, which can increase the reaction time of the liquid medicine and sludge mixture in the pipe. This device uses a secondary mixing reaction, that is, double mixing of the double cone barrel static mixer 2 plus the W-type mixer 3, so that the liquid medicine can act more fully on the sludge, thereby effectively improving the data accuracy during the final detection.

[0052] See also Figure 2 The consolidation assembly includes a consolidation container and a mixture conveying pipe 18.

[0053] In some of the embodiments, the consolidation container is a geotube bag 16, which is a customized product. For example, its length and width are 15m×10m, and the maximum filling height is 2.5m. The geotube bag 16 is water-permeable but can lock the soil. A filling port 17 is provided on the geotube bag 16, and the other end of the mixture conveying pipe 18 is connected to the filling port 17. One end of the mixture conveying pipe 18 is connected to the W-type mixer 3, and the other end of the mixture conveying pipe 18 is connected to the filling port 17. After the sludge-liquid mixture enters the geotube bag 16, it is allowed to stand for a period of time, and then the residual water in the geotube bag 16 is discharged by squeezing, so that the solidified geotube bag 16 and the solidified sludge inside the geotube bag 16 can be obtained.

[0054] The device can be reused. When recycling, the geotube bag 16 can be directly broken and purchased for use, while other devices can be disassembled and recycled and can be directly assembled when used next time.

[0055] In addition, the geotube bag blowing and filling test area 15 can be set up on a flat ground, and a plurality of residual water recovery open ditches 19 are opened around the geotube bag blowing and filling test area 15 to discharge the residual water after the silt consolidation test.

[0056] As mentioned above, at least one embodiment of each part of the pre-construction test device provided by the present invention has been described respectively. It should be noted that each part of the pre-construction test device can be combined in different embodiments to form different embodiments of the pre-construction test device.

[0057] For example, in a specific overall embodiment, the pre-construction test device includes:

[0058] Mud delivery pump pipe 1: Specially supply ordinary mud pump and its pipe for pre-work test of bag filling consolidation mud. The pipe is DN120 cast iron pipe with a wall thickness of 7mm. The mud pump is placed in the onshore primary sedimentation tank (mud tank). The mud outlet port of the pipe is flange-connected with the receiving port of the double cone barrel mixer. The mud and water in the onshore primary sedimentation tank are dredged from the lake desilting construction area by an environmentally friendly cutter suction dredger and transported to the tank for temporary storage through the mud discharge pipe.

[0059] Double cone barrel static mixer 2: A container with cones at both ends (similar to two opposing "trumpet mouths") and a cylindrical barrel in the middle (the cylindrical barrel is the main compartment of the static mixer), made of Q235B steel, welded, and with a wall thickness of 5mm. The flange port at one end is connected to the sludge pump pipe. The flange port at the other end is connected to the W wave mixer, and the diameter of the double cone port is DN120. The diameter of the middle section cylindrical tube is DN300, and the length of the cylindrical tube is 1000mm. Its surface will receive a soft drug delivery short tube, and the outlet of the short tube is connected to the steel nozzle tube embedded in the cylindrical tube. The nozzle of the steel nozzle tube penetrates deep into the double cone barrel mixer and can spray liquid into it. The total length of the cone with flange port and the middle cylindrical barrel is about 1500mm, which is the "primary mixing chamber" of sludge + liquid medicine. The liquid medicine and sludge undergo primary mixing reaction in the double-cone barrel static mixer 2 to achieve primary flocculation.

[0060] W mixer (W type mixer 3): a steel pipe flow channel with a W wave shape, DN120, Q235B steel material, wall thickness 5mm, total length of about 1000mm, total height of the wave flow channel of about 600mm, flanges at both ends of the mixer. One end is connected to the flange, and the other end is connected to the hose mud pipe. Among them, a customized conversion joint is used to connect the hose joint and the flange end. The conversion joint is made of Q235B steel pipe, with a wall thickness of 3mm, a length of about 200mm, and a pipe diameter of D120. One end of the conversion joint is a flange and the other end is a hose joint. The flexible hose is conducive to moving in a small space on site, or to change the turning angle of the hose conveniently and flexibly as needed. The W-wave mixer 3 is a "secondary mixing chamber" for sludge + liquid medicine. Its W-wave flow channel can appropriately slow down the flow rate of mud and liquid medicine, appropriately increase the stagnation time of mud and liquid medicine, promote the secondary mixing reaction of mud and liquid medicine in the mixer flow channel, improve the reaction efficiency of mud water and liquid medicine, and realize secondary flocculation.

[0061] Dosing and dissolving mixing tank 4: A cylindrical storage tank made of PE material, with a diameter of 1500mm, a height of 2000mm, and a wall thickness of about 8mm. It is used as a storage tank for water and medicine. There are 3 groups of them, which are compactly arranged in parallel and fixed to the work station by a fixed working platform and ladder assembly. The dosing and dissolving mixing tank has a total of 3 mixing units, which are installed on a steel fixed bracket just above its dosing port. The lower end of the mixing motor unit is a mixing blade connected by a steel bearing. Each tank body is also equipped with a water level alarm, a water supply pump pipe and a gate valve, and a main pipeline for outputting the liquid medicine. The 3 groups of mixing tanks can mix and supply environmental protection agents of different proportions and concentrations for pre-work testing.

[0062] Water supply pump pipe and gate valve (water supply pump pipe 5): It is composed of 3 groups of ordinary pressure water pumps, DN50mm PE water pipes and gate valves. Its function is to provide water for the dosing and dissolving tank. From a PE water supply main pipe, through a DN50mm tee pipe or elbow pipe, a DN50mm branch pipe is divided to supply water to 3 groups of dosing and dissolving mixing tanks. The outlet of the water supply pipe is bent at 90 degrees at the top of the storage tank and connected to the tank.

[0063] Water level alarm 6: Float type water level automatic alarm, its function is to automatically monitor the water level in the storage tank, when the water level is too low or too high, it will automatically alarm to remind the operator to take measures.

[0064] Stirring motor unit and its long-axis stirring blade 7: The dosing and dissolving drug mixing tank is equipped with 3 stirring motor units, each with a motor power of 5kw, which are installed on a fixed bracket just above the dosing port of the storage tank. The steel fixed bracket is made of Q235B profile. The lower end of the stirring motor unit is a stirring blade connected by a steel bearing. Its function is that after the storage tank is filled with water and the drug is added, the motor drives the stirring blade at its lower end to stir the dissolved drug and condition the drug liquid.

[0065] The main pipeline 8 for outputting the medicine liquid is installed at the bottom of the medicine box. First, three DN50mm short pipes for outputting the medicine liquid are connected from the outlets at the bottom of the three groups of dosing and dissolving mixing tanks. A control gate valve is installed on each short pipe to close or open the pipeline. The short pipes are then connected to a DN50mm PE main pipeline 8 for outputting the medicine liquid through a DN50mm elbow pipe or a tee pipe. The main pipe collects and transports the medicine liquid in each tank. The end of the main pipe close to the relay medicine delivery pump is a flange interface, which is connected to the water hose through a customized conversion joint, that is, one end of the conversion joint is a flange and the other end is a water hose joint. The diameter of the water hose is DN50mm, one end is connected to the conversion joint, and the other end is connected to the relay medicine delivery booster pump. The flexible water hose is conducive to moving in a small space on site, or changing the turning angle of the water hose conveniently and flexibly as needed. In order to facilitate the opening and closing of the main pipeline for outputting the medicine liquid, a control gate valve and flowmeter are specially set at the position of the conversion joint.

[0066] Relay drug delivery pressure pump 9: The power is 3kw, and the maximum pressure can be 1.6mpa. It is installed at the end of the main pipeline of the output drug solution near the conversion joint. Its input inlet is connected to the output drug solution main pipe through a hose, and its output outlet is connected to the cantilever multi-hole drug delivery pipe through a flange. The cantilever multi-hole drug delivery pipe is connected to the drug delivery soft capillary. The function of the relay drug delivery pump is to pressurize and deliver the drug solution to the dosing point.

[0067] Cantilever porous drug delivery tube 10: The cantilever porous drug delivery tube 10 is installed on the output port of the relay drug delivery booster pump 9, and is a "factory"-shaped cantilever type (the cantilever tube is convenient for flexible arrangement of drug delivery hoses), which is a DN50mm steel pipe with a wall thickness of 3mm, a vertical riser length of about 500mm, and a horizontal cantilever tube length of about 600mm. The tube wall of the horizontal cantilever tube opens 6 drug outlet holes with an aperture of DN20mm, arranged in a line, and a spacing of about 50mm. Each small hole is welded with a DN20mm steel pipe with a wall thickness of 3mm and a steel pipe length of about 100mm. A control gate valve is installed at one end of each steel pipe to open and close the pipeline. One end of the outlet of each control gate valve is respectively connected to a rubber hose, DN20mm, with a wall thickness of 5mm, and each rubber hose is about 1500mm long. One end of the outlet of the 6 hoses is respectively connected to the steel drug inlet nozzle pipe reserved on the surface of the middle cylindrical barrel of the double cone barrel mixer 2.

[0068] Soft drug delivery short tube 11: The soft drug delivery short tube 11 is a flexible rubber hose, 6 in total, DN20mm, wall thickness 5mm, and each rubber hose is about 1500mm long. Hose fastening joints are installed at both ends of the short tube, one end is connected to the control gate valves at the 6 drug outlet ends of the cantilever multi-hole drug delivery tube (horizontal cantilever tube part), and the other end is connected to the steel drug inlet nozzle pipe reserved on the surface of the middle cylindrical tube of the double cone barrel mixer 2. The flexible hose is conducive to moving in a small space on site, or to change the turning angle of the hose conveniently and flexibly as needed. Each control gate valve at the front end of the hose can also be used to quickly open and close a single or multiple hoses to quickly and flexibly adjust the drug delivery amount.

[0069] Control cabinet (electrical control box 12): It consists of 1 set of electrical control cabinets, which have automatic and manual control systems and operation buttons. It is installed on a steel operating platform near the storage tank. Its function is equipment control, mainly controlling the mixing motor group, pump group, water level alarm and video monitor, etc.

[0070] Gate valves and pressure gauges (gate valve plus pressure gauge 13): Gate valves and pressure gauges are installed on various types of attached pipelines according to work needs to open and close the pipelines and adjust the pressure of conveying mud and liquid medicine.

[0071] Fixed working platform and ladder (fixed working platform plus ladder 14): Made of Q235B steel, with a wall thickness of 3mm, it mainly includes square steel pipe + flat steel belt guard ring on the outer wall of the cylinder + steel pipe ladder, and channel steel column frame + steel plate + steel grid welded platform + steel pipe guardrail. It is a fixed bracket, working platform and ladder facility for the dosing and dissolving mixing cylinder. It is used to stabilize the cylinder, set up the mixing pump group and its long-axis mixing blades, and is used by dosing personnel to add reagents on the platform, observe or adjust the water level in the storage tank. In addition, it can also be used by test operation management, test sampling and detection, equipment maintenance and daily safety inspection personnel, and is also used for maintenance, observation, daily maintenance and up and down ladders. To ensure stability, the roots of the square steel pipes on both sides are buried in the plain concrete cushion layer to a depth of 500mm.

[0072] Geotube bag blowing and filling pre-construction test area 15: The pre-construction test area is about 25m long and 15m wide. The pre-construction test area is relatively small. It is located in the onshore mud discharge site in the lakeside wetland area, upstream of the primary sedimentation tank (mud pool), close to the lake embankment, and close to the end of the mud discharge pipe of the environmentally friendly suction dredger and the garbage screening device. It is convenient to shorten the mud transportation distance and the length of the open ditch for recovering the residual water (tail water) in the pre-construction test area, avoiding the occupation of excess lakeside wetlands and causing no occupation or damage to the lake embankment and embankment foot. The pre-construction test area is divided into two areas: the blowing and filling tube bag layout area and the test device layout area. The ground of the blowing and filling tube bag layout area is about 200mm higher than that of the test device layout area. The two areas cooperate with each other to complete the pre-construction test tasks. The specific information is as follows:

[0073] 1. Blow-fill tube bag layout area: Since the geotextile tube bag used in the pre-construction test is a customized product, its length and width are 15m×10m, and the maximum filling height is 2.5m, so the length and width of the tube bag layout area is 20m×15m. The site is flat with original soil and compaction degree of 80%. A layer of 300g / m 2 Ordinary anti-seepage geotextiles are used, and a 100mm thick graded gravel isolation layer is laid on the top of the geotextile. During the pre-construction test, the geotextile tube bag will be laid flat on the graded gravel isolation layer. A 500mm×350mm drainage ditch is dug around the site, with a slope of 2.5%. A layer of 300g / m 2 The ordinary anti-seepage geotextile is used. The open drainage ditch is the drainage recovery ditch for the residual water (tail water) from the pre-construction test, and it is the terminal drainage outlet of the residual water (tail water) recovery open ditch leading to the onshore mud discharge site.

[0074] 2. Test device layout area: This area is the installation, layout and operation site for the dosing and dissolving mixing tank, various pump groups and pipeline devices. The length and width are 15m×5m. The site is flat with original soil and the compaction degree is 80%. The upper part of the site is a 100mm thick C20 plain concrete hardened cushion. The pre-construction test device is installed and arranged on the upper part of the plain concrete cushion. A 500mm×200mm open drainage ditch is set around the cushion. The slope of the drainage ditch is 2.5%. A layer of 300g / m2 ordinary anti-seepage geotextile is also laid in the drainage ditch. The drainage open ditch is the drainage recovery ditch of the residual water (tail water) of the pre-construction test, which leads to the end drainage outlet of the residual water (tail water) recovery open ditch of the onshore mud discharge site.

[0075] Surplus water (tail water) recovery open ditch (surplus water recovery open ditch 19): Before construction, 500mm×350mm and 500×200mm drainage open ditches were dug around the test site. The slope of the drainage ditch was 2.5%, and a layer of 300g / m 2 The drainage open ditch is the drainage recovery ditch for the residual water (tail water) from the pre-construction test, which leads to the end drainage outlet of the residual water (tail water) recovery open ditch of the onshore mud discharge site, and the end drainage outlet directly leads to the upstream end of the onshore primary sedimentation tank (mud pool). The residual water (tail water) recovery open ditch is specially used to collect the residual water (tail water) generated by the pre-construction test, and then flows into the onshore primary sedimentation tank. The residual water (tail water) finally enters the tail water purification stage until the first-level discharge standard is completed. In addition, a certain concentration of environmental protection agents still remain in the water flow collected in the residual water (tail water) recovery open ditch. In the onshore primary sedimentation tank and the subsequent tail water purification stage, it can still be fully utilized to participate in water purification, without being wasted, and will not cause secondary pollution to the surrounding environment and wetlands. After the recovered tail water is purified to meet the standards, it is discharged to the lakeside wetlands and rivers and lakes for water replenishment. The remaining agents and the residual water (tail water) after purification that meets the standards are all recycled and reused.

[0076] Onshore primary sedimentation tank: The onshore primary sedimentation tank is located in the cofferdam between the onshore mud field and the lakeside wetland, close to the lake embankment. The cofferdam is a clay-filled cofferdam, and the surface is covered with ordinary composite anti-seepage geotextile (two cloths and one membrane, with specifications of (200g / m2) / 0.5mm / (200g / m2)). The bottom width of the cofferdam is 33.1m, the top width is 2m, and the height is 7m. The effective area of ​​the sedimentation tank is about 18,225 square meters, the volume is about 91,125 cubic meters, and it can store about 82,012 cubic meters of mud water, which is greater than the dredging volume of 24h. The average sedimentation time of the onshore sedimentation tank is greater than 24 hours, so there will be more than 1 / 3 of the surface clear water in the surface flow. The onshore primary sedimentation tank receives the mud water screened and filtered at the river and lake bottom mud input port. It is the main holding pool for the lake bottom mud dredging mud, so it is also commonly known as the mud pool. In addition, the residual water (tail water) generated in the test area 15 before the geotube filling also flows back to the onshore primary sedimentation tank. The residual water (tail water) contains environmental protection agents left over from the sludge solidification process. The agents can promote the flocculation and sedimentation of the bottom mud in the sedimentation tank, which not only realizes the reuse of the residual agents and avoids the waste of agents, but also improves the effect of flocculation and sedimentation of the bottom mud. The rear part of the onshore primary sedimentation tank is other multi-stage sedimentation tanks for the purification and clarification of the residual water (tail water).

[0077] Environmentally friendly agents used: Environmentally friendly agents (PAM+PAC) are added, mixed, dissolved and transported. During the pre-construction test, different designed ratios of agents are used for test comparison and verification for different working conditions. The agent ratio data selected from the pre-construction test will be used for subsequent large-scale construction production. In addition, the sampling test data of the construction process monitoring will be compared. If there is a deviation, it will be fine-tuned to meet different working conditions to ensure strong pertinence, accuracy and reliability.

[0078] The advantages and positive effects are:

[0079] (1) The pre-construction test device has a compact configuration and reasonable zoning layout. It only occupies a small area within the construction red line, which can effectively solve the problem of conflict between the layout of the pre-construction test site and the lake embankment and lakeside wetlands. It can reduce the requisition of sites, avoid additional occupation of lakeside wetlands outside the requisition red line, reduce site hardening, reduce the purchase of equipment, and reduce project costs. It can reasonably and effectively utilize the limited space of land and water mud discharge sites, embankments and lakeside wetlands, overcome the problem of operating in limited narrow spaces, and meet the needs of effective connection and automatic monitoring of various process flows. It can fully integrate the functions of various system facilities in the land and water mud discharge areas, aiming to achieve the goal of shortest distance for receiving and transporting mud, shortest distance for dosing and agent transportation, shortest transportation time, small pressure loss and energy loss during transportation, and fastest discharge of residual water (tail water). It can achieve the goal of safe and reliable, efficient sludge transportation, efficient and fast filling, rapid dissolving and mixing, high efficiency of repeated filling consolidation, convenient and environmentally friendly recovery and purification of tail water, and protect the ecological environment and water quality of the factory area, lake area and surrounding wetlands from secondary pollution, which is in line with the green construction concept of "four savings and one environmental protection".

[0080] (2) The device adopts a "double mixer" configuration in series (i.e., a "double cone barrel static mixer 2" and a "W mixer (W-type mixer 3)" in series). It has a sophisticated configuration, a scientific and reasonable structure, is safe and reliable, occupies a small area, has a low cost, and has high work efficiency after the series combination. It quickly realizes the two-stage mixing reaction of mud water and liquid medicine, achieves the two-stage flocculation target, and has high efficiency in transporting blown fill mud water into the geotube bag 16 on the pre-construction test site 15, which speeds up the test progress and improves the test quality.

[0081] (3) The double-cone barrel static mixer 2 used is a "primary mixing chamber" for sludge + liquid medicine, which accepts both input mud and liquid medicine. Its two ends are cones (similar to two opposite "trumpet mouths") and the middle section is a cylinder. The inside of the container is a chemical reaction mixing chamber for mud, water and medicine. Both mud, water and medicine have a pressure of 0.3-1.0MPA. When mud and water enter from the cone inlet, they are subjected to an amplifying diffusion effect similar to a "trumpet mouth", and when mud and water flow through the cone outlet, they are subjected to a contracting squeezing effect similar to a "trumpet mouth". At the same time, the 6 injection nozzles of the main chamber section of the cylindrical barrel timely spray liquid medicine with a pressure of 0.3-1.0MPA, which can make the sludge and liquid medicine swirl continuously inside the static mixer 2 to form a vortex, thereby completing the primary mixing and flocculation reaction. The mud and medicine fusion effect is fast and the work efficiency is high.

[0082] (4) The W mixer 3 is used to receive the sludge and liquid medicine mixture flowing in from the outlet of the double cone barrel static mixer 2. The W wave mixer has the function of blocking the flow rate. On the one hand, it can appropriately prolong the stagnation time of the mud and liquid medicine in the double cone barrel mixer, which can further improve the efficiency and quality of the primary mixing reaction and the primary flocculation. On the other hand, it can reduce the flow rate of the sludge and liquid medicine mixture that has already flowed into the lumen of the W wave mixer flow channel, continue to use the pressure and vortex potential energy, make the secondary mixing reaction more complete, and make the secondary flocculation effect better.

[0083] (5) The three groups of dosing, dissolving and mixing tanks 4 are economical, safe, environmentally friendly, easy to assemble, and compatible with various pumps, pipes, gate valves, etc. They can be reused after being dismantled and used, and are low-cost. The three groups of tanks can add, mix and transport three different designed ratios of reagents to the dosing point each time, so as to carry out bag filling consolidation tests for sludge of different particle sizes and concentrations and for different working conditions, meet the test work rhythm and progress requirements, and dosing, mixing, dissolving and transporting can be efficient, fast, convenient and flexible, improve work efficiency, and save a lot of time and manpower.

[0084] (6) The arrangement of one cantilevered multi-hole drug delivery pipe 10 (main pipe) + six soft drug delivery short pipes 11 (branch pipes) is scientific and reasonable. The cantilevered multi-hole drug delivery pipe 10 (main pipe) receives the drugs with different design proportions from the three groups of tanks at the rear, and finally gathers and mixes them in this pipe. It is the main terminal of the mixed delivery of drugs. The horizontal cantilever pipe is used to arrange six soft drug delivery short pipes 11 (branch pipes) and their corresponding six control gate valves on its surface in sequence, which is convenient for numbering. It is convenient to open and close the branch pipes separately according to the needs of pre-work tests, or to open and close certain branch pipes in groups selectively. In order to meet the needs of different working conditions, the arrangement is orderly and reasonable, the numbering is clear, the control is convenient and flexible, and the centralized or grouped drug supply is efficient and fast.

[0085] (7) When the residual water (tail water) returns, the remaining reagent flows into the primary sedimentation tank (mud tank), and the remaining reagent also reacts chemically with the sludge temporarily stored in the sedimentation tank. That is, the initial mixing reaction and initial flocculation are promoted by utilizing the water flow disturbance of the recovered residual reagent, the mud pump blade disturbance and the disturbance of the ship operating in the tank, which is more beneficial to the subsequent two-stage mixing reaction and two-stage flocculation, and more beneficial to the pre-construction test, improving the subsequent flocculation effect, saving the amount of reagents, avoiding waste, and accelerating the progress of the test.

[0086] (8) The device can overcome the unfavorable factors such as the small site limitation and complex working environment. The hose pipe and soft short pipe used can be used to coordinate the layout of the device according to the location of the primary sedimentation tank, mud discharge pipe, sludge garbage screening system, tailwater recovery facilities, levee and lakeside wetland in the land mud discharge field. It is quick to install and disassemble, and convenient and flexible for local adjustment. The device has a safe and reliable structure, mechanized flow operation, and simple and orderly operation, which is conducive to eliminating safety hazards and achieving safe operation.

[0087] (9) The device is simple in material, scientific in construction, safe in structure, economical and applicable, fast and efficient, easy to use, and each component can be installed and disassembled quickly and easily. It can be promoted and applied among the project groups undertaken by the enterprise, such as dredging of lakes, reservoirs, rivers and ponds, construction of cofferdams of sluice stations and pump stations, shoreline restoration, ecological management and high-standard farmland construction. It has the goal of replicable principles and reusable equipment after dismantling, achieving the goal of high promotion and application value among similar project groups under construction. The pre-construction test device can prevent silt and tailwater from leaking out and polluting the factory area and wetlands, has environmental protection and energy-saving effects, and is in line with the design concept of green buildings advocated by the country. Specific implementation method:

[0089] The pre-construction test device is arranged between the outside of the lake embankment and the inlet section of the first-level sedimentation tank of the onshore mud discharge site. It is located upstream of the first-level sedimentation tank (mud pool) of the onshore mud discharge site in the lakeside wetland area. The sedimentation tank cofferdam separates the test device and the test site from the lakeside wetland, and is close to the end of the mud discharge pipe of the environmentally friendly suction dredger and the garbage screening device. The pre-construction test site is divided into two areas: the blowing and filling pipe bag layout area and the test device layout area. The ground of the blowing and filling pipe bag layout area is about 200mm higher than that of the test device layout area. The two areas cooperate with each other to complete the pre-construction test tasks. In the pre-construction test site, only the test device layout area needs to be hardened with a plain concrete cushion layer. The tailwater (residual water) recovery open ditch is arranged around the site, and the end leads to the first-level sedimentation tank of the onshore mud discharge site. Place three groups of dosing and dissolving mixing tanks 4 on the cushion layer of the test device layout area, arranged in a straight line in the shape of a "one", and stabilized by a fixed platform. One side of the tank is the blowing and filling tube bag layout area 15 for laying geotextile tube bags 16, and the other side is the mixer, pump group and pipeline, control cabinet and other components. After the various components of the device are installed in sequence, the equipment is debugged. After normal operation, it can be handed over to the test technicians and operators for use, and the pre-work test operation tasks will begin. Video surveillance cameras, lighting equipment and environmental monitoring devices are installed near the device, and safety guardrails and passages are set up for operations near water, edges and high places.

[0090] Operation mode: After the polluted lake sludge is dredged and transported to the first-level mud sedimentation tank on land by an environmental protection suction boat, it is temporarily stored in the tank. Before the pre-construction test begins, several mud sampling points are first determined from the tank and numbered, and the mud water concentration and particle size parameters are pre-sampled and analyzed. Then, the reagent mix ratio is designed according to the mud sampling point data for the next step of pre-construction test. According to the designed ratio in advance, the drugs are added and dissolved in the three groups of tanks respectively, and the drugs are delivered and added when the test starts. Before the test, the geotextile tube bags 16 of customized sizes for the test are laid out in advance in the blowing and filling tube bag layout area, and the mud pipe outlet is properly connected with the tube bag blowing and filling port 17, ready to receive the blowing and filling sludge and liquid medicine. According to the test plan, the order of mud sampling points is accurately adopted, and the mud pumps are arranged and the respective mud pipes are connected. At the beginning of the pre-construction test, the sludge pump in the sludge sedimentation tank will transport the sludge at the designated mud collection point to the pre-construction test device, and the sludge pump pipe will transport the sludge water to the double cone barrel mixer. According to the synchronous instructions of the test technicians, the control valve is opened at the same time, the medicine is delivered by the medicine delivery pump pipe, and the medicine liquid is sprayed into the double cone barrel mixer 2 through the soft medicine delivery short tube. After the sludge and muddy water complete the primary mixing reaction and primary flocculation in the double cone barrel mixer 2, they enter the W mixer 3 to complete the secondary mixing reaction and secondary flocculation. The liquid medicine after the two-stage mixing reaction and two-stage flocculation is transported to the geotextile tube bag 16 through the hose. After the first continuous blowing to the sludge volume of 300mm-500mm height, the blowing into the geotextile tube bag 16 is stopped. The test personnel observe the water filtration effect and consolidation effect after the tube bag is blown, and the mud and water samples are taken and sent to the on-site laboratory for testing, and the test data are recorded and compared. After that, the second subsequent filling and repeated filling work will be started according to the test plan, and the mud sampling point will be changed according to the test plan. According to different working conditions, the agents with different design ratios will be changed, and the test data will be sampled, tested, recorded and compared simultaneously. The maximum filling height of the geotextile tube bag is no more than 2.5m. After the filling is completed, the filling operation is stopped, and the tube bag enters the stage of continuous filtration, dehydration and consolidation of dry mud. According to the characteristics of the sludge, each pre-work test can last for a maximum of 1 to 3 days. During this period, a small amount of liquid medicine can be added to the surface mud and water mixture in the tube bag as needed to accelerate the flocculation of fine particles of sludge on the surface, promote the separation of mud and water, and accelerate the dehydration and consolidation progress of the tube bag. After 3 days, when the moisture content of the consolidated dry mud in the tube bag reaches the standard of ≤50%, the design index requirement is met, indicating that the current test task is completed, and the next round of pre-construction test operations can be restarted according to the test task, or all pre-construction test tasks can be completed after the test is completed, and large-scale formal construction production tasks can be entered. In the new round of tests, new geotextile tube bags 16 will be replaced and the agent will be re-prepared.In addition, the residual water (tail water) generated by each pre-construction test is collected in the primary sedimentation tank and enters the subsequent tail water purification and clarification process until it reaches the primary discharge standard, that is, SS (suspended solids concentration) <70mg / L, COD (chemical oxygen demand) <100mg / L, ammonia nitrogen <15 mg / L, and the pH value should comply with the "Surface Water Environmental Quality Standard" (GB3838-2002) standard. The residual water that meets the standards is discharged to the lakeside wetland and Nanfei River through the wetland pump station, and the resources are recycled and reused for river, lake and wetland water replenishment, and the resources are used for ecological restoration. After the test is completed, the consolidated dry mud in the geotube bag will be transported to the mine for backfilling, used for mine pit ecological restoration, and planting green plants. The geotube bag 16 used for the test will also be specially recycled and returned to the factory after use for harmless treatment. The data generated, collected and sorted by the pre-construction test will be used in formal construction production.

[0091] Compared with traditional devices, the pre-construction test device using the tube bag quick filling and consolidation sludge has the advantages of simple material, scientific construction, safe structure, economical and applicable, fast and efficient, easy to use, convenient and quick installation and disassembly of each component, high reuse rate after completion and dismantling, less land occupation, less equipment purchase, low operating cost, simple and safe operation, energy saving and environmental protection, wide application range, etc. No pollutants are generated during the construction process, which can avoid the leakage of sludge and tail water to pollute the factory area and wetlands, and has environmental protection and energy-saving effects, which can greatly improve construction production efficiency, reduce construction costs, and ensure construction safety. The device can be widely used in pre-construction tests of tube bag filling in lakes, reservoirs, rivers and ponds, etc., and can be promoted and applied in similar projects.

[0092] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0093] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

Claims

1. A pre-work test device for sludge consolidation treatment, characterized in that: include: A sludge delivery pump pipe (1), which is used to extract sludge; Drug proportioning components, which are used to provide drugs in different proportions; A drug sludge mixing device, comprising a double-cone barrel static mixer (2) and a drug liquid output main pipeline (8), wherein the double-cone barrel static mixer (2) is a cylindrical body with gradually contracting ends, one end of which is connected to a sludge delivery pump pipe (1) through a flange port, and the other end is connected to a W-shaped mixer (3) through a flange port, one end of the drug liquid output main pipeline (8) is connected to the drug proportioning component, and the other end is connected to a relay drug delivery pressurizing pump (9), one end of the relay drug delivery pressurizing pump (9) is connected to a cantilevered multi-hole drug delivery pipe (10), and a plurality of holes of the cantilevered multi-hole drug delivery pipe (10) are connected to the middle of the double-cone barrel static mixer (2) through a plurality of soft drug delivery short pipes (11); The consolidation component is connected to the W-type mixer (3) and is used to collect the sludge-liquid mixture and place it for consolidation.

2. The pre-construction test device for sludge consolidation treatment according to claim 1 is characterized in that: The outer wall of the columnar barrel is conical at both ends, and the middle part is cylindrical. A plurality of sealing interfaces are arranged on the middle outer wall of the columnar barrel, and the plurality of sealing interfaces are used to connect to the soft drug delivery short tube (11).

3. The pre-construction test device for sludge consolidation treatment according to claim 1, characterized in that: The drug proportioning assembly comprises a water supply pump pipe (5), a drug adding and dissolving mixing tank (4), and a fixed working platform plus a ladder (14); Three dosing and dissolving mixing tanks (4) are provided and arranged side by side, and fixed working platforms and ladders (14) are installed on the three dosing and dissolving mixing tanks (4) for operators to climb and work; The water supply pump pipe (5) supplies water to the three drug-adding and dissolving mixing tanks (4) through a tee pipe or an elbow pipe. The outlet of each branch pipe of the water supply pump pipe (5) is bent at 90 degrees at the top of the drug-adding and dissolving mixing tank (4) and connected to the tank. The lower parts of the outer walls of the three drug-adding and dissolving mixing tanks (4) are connected to the main pipeline (8) for outputting the drug solution through pipelines, and gate valves and pressure gauges (13) are respectively provided at the nodes between the main pipeline (8) for outputting the drug solution and each branch pipeline.

4. The pre-construction test device for sludge consolidation treatment according to claim 3 is characterized in that: A gate valve and a pressure gauge (13) are provided at the inlet of the water supply pump pipe (5), which are used to open and close the water supply pump pipe (5) and adjust the pressure of liquid delivery.

5. The pre-construction test device for sludge consolidation treatment according to claim 3 is characterized in that: The drug adding and dissolving mixing tank (4) comprises a tank body, a water level alarm (6) and a stirring motor unit and its paddles (7); A water level alarm (6) is arranged on the tank body to monitor the water level and sound an alarm when the water level overflows; The stirring motor unit and its blades (7) are mounted on the tank body and are used to stir the liquid in the tank body.

6. The pre-construction test device for sludge consolidation treatment according to claim 1, characterized in that: The consolidation assembly comprises a consolidation container and a mixture delivery pipe (18); one end of the mixture delivery pipe (18) is connected to the W-shaped mixer (3), and the other end of the mixture delivery pipe (18) is connected to the consolidation container.

7. The pre-construction test device for sludge consolidation treatment according to claim 6, characterized in that: The consolidation container is a geotextile tube bag (16), a filling port (17) is provided on the geotextile tube bag (16), and the other end of the mixture conveying pipe (18) is connected to the filling port (17).

8. The pre-construction test device for sludge consolidation treatment according to claim 1, characterized in that: The pre-construction test device also includes a geotube filling test area (15) and an open ditch for residual water recovery (19); The geotube bag blowing and filling test area (15) is set on a flat ground, and a plurality of residual water recovery open ditches (19) are opened around the geotube bag blowing and filling test area (15) to discharge the residual water after the sludge consolidation test.

9. The pre-construction test device for sludge consolidation treatment according to claim 1, characterized in that: The main pipeline (8) for discharging the liquid medicine is provided with a gate valve and a flow meter (20), which are used for opening and closing the main pipeline (8) for discharging the liquid medicine and for controlling the flow rate.

10. The pre-construction test device for sludge consolidation treatment according to claim 1, characterized in that: The soft medicine delivery short tube (11) is a rubber hose.

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