A non-constant flow rate pulsed sediment remediation device and operation method

Abstract

The present invention discloses a non-constant flow rate pulsed sediment remediation device and an operation method. The system includes three subsystems: a sediment system, a detection and remediation system, and a control and supply system. Aiming at the prominent problems such as frequent changes in river / lake water levels, difficulty in promptly identifying sediment pollution, lack of effective detection, cleaning and remediation devices and methods, etc., the present invention is based on a detection and remediation system that can measure the water level height, constructs a system for identifying sediment pollution of different depths, different types, and different degrees, realizes the intelligent and efficient remediation of sediment pollution in lakes with non-constant water levels, improves the accuracy, efficiency, and durability of sediment remediation. Reduces the pollution of the water body by the contaminated sediment, making it harmless to the ecology and environment. The present invention has the advantages of low cost, less investment, convenient operation, high remediation efficiency, stable performance, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of ecological restoration, and particularly relates to a non-constant flow rate pulsed sediment restoration device and an operation method thereof. Background Art

[0002] The main reason for the black odor in river channels is that the load of organic matter pollution in the river bottom sediment is too high. The decomposition of organic matter consumes a large amount of oxygen, resulting in hypoxia in the water body and sediment. The organic matter is anaerobically decomposed by microorganisms, thus generating black and odorous substances. There are three major categories for treating black and odorous water bodies: physical, chemical, and biological restoration.

[0003] The chemical method is to screen or synthesize chemical agents to control the components in the water that cause black odor, and put one or several synthetic chemical products with safe performance in safe and reliable doses, so as to quickly achieve the purpose of reducing black odor and inhibit the black odor phenomenon within a certain period of time. The most commonly used and technically mature method at present is the addition of chemical agents. By adding chemical agents, the landscape effect of the water body can be quickly improved, but there are certain skills in the use of the agents. Otherwise, it is easy to cause agent residues and generate secondary pollution while improving the water environment.

[0004] The patent application document with the application number CN202210038129.6 discloses an in-situ sediment restoration agent dosing device and method based on high-speed water jets, including a high-speed water jet power component, a medicine feeding component, and a terminal jet control component; the high-speed water jet power component includes a water pump mechanism, a variable voltage controller, and a voltage stabilizing mechanism, the terminal jet control component includes a plurality of terminal jet control monomers arranged in a matrix and a flow splitting mechanism, the medicine feeding component includes a medicine adding tank and a main body frame, the medicine adding tank is located at the center position inside the main body frame, the medicine adding tank is provided with a water inlet and a medicine adding port, and a stirring mechanism is arranged inside the medicine adding tank. However, it does not consider the characteristics of frequent changes in the water levels of rivers / lakes and fails to discuss the restoration of different depths and different types of sediment.

[0005] The patent application document with the application number CN 202110107642.1 discloses a black and odorous sediment restoration agent, its preparation method and application. The black and odorous river sediment restoration agent of the present invention is a granule, which mainly consists of three parts: ① a restoration agent and a stabilizer; ② auxiliary materials (physical adsorption materials); ③ an embedding agent. The restoration agent and the stabilizer are calcium peroxide (CaO2) and nano-hydroxyapatite (Ca 10(OH)2(PO4)6), with zeolite powder as the auxiliary material and a 5% polyethylene (PVA) solution by mass concentration as the embedding agent. Aiming at black and odorous sediment, this invention can add granular agents without draining water to repair polluted sediment, achieving the effects of simultaneously removing AVS, stabilizing phosphorus and various heavy metals, and controlling the release of ammonia nitrogen in the sediment. It can avoid the risk of secondary pollution caused by ex-situ repair, reduce the workload of in-situ repair, and improve the efficiency of sediment treatment. It is of great significance for the treatment of urban black and odorous water bodies.

[0006] The patent application document with the application number CN202010611047.7 discloses a method for treating black and odorous water bodies based on physical and chemical - micro - ecological combined measures, including the following steps: direct discharge pollution control, using a clarification device and a metal - membrane activated carbon filtration device to treat the wastewater discharged into the river and reduce the pollution load entering the river; bottom quality improvement, first adding an immobilized microorganism sediment repair agent to degrade pollutants and in - situ repair the polluted sediment, and then adding an ecological bottom quality improvement agent to passivate the sediment and reduce nitrogen and phosphorus pollution in the water body; in - situ purification, applying in - situ purification measures to construct a diverse habitat suitable for the growth and action of microorganisms in the water body, promoting the construction of a micro - ecological system, and strengthening the decomposition of pollutants by microorganisms. However, the application method of the above - mentioned black and odorous sediment repair agent is simply adding it to the water body, without pertinence for the repair of sediments with different depths and different types, and without considering the characteristics of frequent water - level changes in rivers / lakes. Therefore, there is an urgent need in the industry for a mechanical, intelligent, efficient, precise, time - saving and labor - saving sediment repair device. Summary of the Invention

[0007] Aiming at the problems that the prior art cannot timely identify, effectively detect, clean and repair the problems of frequent water - level changes in lakes and difficult sediment pollution, the present invention provides a non - constant flow rate pulse sediment repair device and an operation method. Based on a detection robot device capable of measuring water - level height, a device for identifying sediment pollution with different depths, different types and different degrees is constructed to achieve intelligent and efficient repair of sediment pollution in lakes with non - constant water levels, improve the accuracy, efficiency and durability of sediment repair, reduce the pollution of polluted sediment to the water body, and make it harmless to the ecology and environment. The present invention has the advantages of low cost, less investment, convenient operation, high repair efficiency, stable performance, etc.

[0008] Technical Solution

[0009] The purpose of the present invention is achieved through the following technical solutions:

[0010] A non - constant flow rate pulse sediment repair device, the non - constant water - level pulse sediment repair device includes three subsystems: a sediment system (1), a detection and repair system (2), and a control and supply system (3);

[0011] Among them, the sediment system (1) includes sediment (1-1), water body (1-2), sand dune (1-3), polluted sediment layer (1-1-1), transition layer (1-1-2), and normal tidal sediment layer (1-1-3); the sediment (1-1) is mainly lake polluted sediment, and the water body (1-2) is an unsteady water body with continuously changing water level; the sand dune (1-3) is a landform formed by the accumulation of gravel in the riverbed. It is arranged in parallel or distributed in scales. The slopes on both sides of the sand dune are asymmetric, with the steep slope facing the downstream of the river, reaching about 30 degrees, and the slope on the water-facing side is relatively gentle;

[0012] The detection and repair system (2) includes a hydraulic leveling mechanism (2-1), a hydraulic detection mechanism (2-2), a hydraulic sampling system (2-3), a detector (2-4), a dosing cylinder (2-5), a hydraulic cylinder (2-6), a pulsator (2-7), and a multi-layer storage tank (2-8); a pressure sensor is installed at the end of the hydraulic detection mechanism (2-2), and the sensitivity is 1-2 mV / V;

[0013] The control and supply system (3) includes a stabilizer (3-1), a central controller (3-2), and a power device (3-3);

[0014] The stabilizer (3-1) is connected to the central controller (3-2) to maintain the stability of the underwater device and reduce the damage of water shear stress to the device;

[0015] The hydraulic cylinder (2-6) is connected to the dosing cylinder (2-5) and the pulsator (2-7) to provide a certain amount of hydraulic pressure to accelerate the dosing of dosing materials such as repair agents;

[0016] The power device (3-3) provides the main driving force for the devices used in this system, with a maximum thrust of 5000-6000 N, a propulsion speed of 0.03-0.12 m / s, and an idling speed of about 60-120 r / min;

[0017] The inner tube of the pulsator (2-7) is divided into three parts, which are respectively used for the dosing of repair agents, algal species removers, and submerged plant seeds. An ecological board is installed at the lower end, and according to the lake flow rate information measured by the flow rate measuring device, it extends a corresponding length to prevent the sediment from floating up.

[0018] The hydraulic leveling mechanism 2-1 is composed of a vehicle frame, a bulldozing device, crawlers, and a hydraulic pusher, and the hydraulic pushing structure performs underwater operations.

[0019] The hydraulic detection mechanism 2-2 is composed of a positioning system, a profiler, a hydraulic pusher, and a control component.

[0020] The hydraulic sampling system 2-3 is composed of a grab rod, a hydraulic telescopic rod, and a water filter. There are slots on the front and back sides of the water filter, which can quickly filter out the sewage in the mud sample.

[0021] The pulser 2-7 is composed of a hydraulic pulse generator, a pulse tube, an ecological plate and a stirring device.

[0022] An operation method of a non-constant flow rate pulse sediment remediation device includes the following steps:

[0023] Step 1): First, the hydraulic detection mechanism 2-2 of the monitoring and remediation system 2 detects the target sediment 1, and transmits the detection data, the volume V of the original sediment, the sediment thickness H1, the water depth H2, and the water flow velocity v to the central controller 3-2.

[0024] The central controller 3-2 feeds back the detection data to the hydraulic leveling mechanism 2-1, and the hydraulic leveling mechanism 2-1 levels the sand dune 1-3.

[0025] Step 2): The hydraulic sampling system 2-3 starts to work, collects an appropriate amount of sediment 1-1 and sends it to the detector 2-4 for detection. The detector 2-4 transmits the pollution index to the central controller 3-2. The central controller 3-2 first compares the measured value with the national average value and the standard value of the second level (PH>7.5) in the soil environmental quality standard to calculate the pollution index, calculates the average index Pi of the sample, the relative comprehensive pollution index M, and determines the M value. The determination method is as shown in Equation 1:

[0026]

[0027]

[0028] Note: I i max: The maximum value of the pollution index of each detection item of the sample;

[0029] I0: The comprehensive pollution index calculated from the average value of the detection items in the bottom layer of the lake bottom;

[0030] I: The comprehensive pollution index;

[0031] When the output is 0, the central controller 3-2 determines that there is no pollution in the sediment 1-1; then go to Step 5);

[0032] When the output is 1, the central controller 3-2 determines that the sediment 1-1 is polluted, then starts the hydraulic detection mechanism 2-2 to measure the volume V of the sediment, and transmits the measurement data to the central controller 3-2. The central controller 3-2 calculates the data to obtain the dosage X of the remediation agent. The calculation method is as shown in Equation 2:

[0033] k m =(1 + w1) / (1 + w2) (Equation 3)

[0034] V H = k MM2 / r1 (Equation 4)

[0035] k v = S r2 (S r1 + w1G s ) / S r1 (S r2 + w2G s ) (Equation 5)

[0036] V = V2 / k v (Equation 6)

[0037] X = V × C TN、TP (Equation 7)

[0038] Note: V H : The volume of the sediment after repair is converted to the volume below the water surface, m 3 ;

[0039] k v : Is the volume conversion coefficient;

[0040] k m : Is the weight conversion coefficient;

[0041] G s : Is the specific gravity of the sediment soil, generally 2.74 can be taken for cohesive soil;

[0042] w1, w2: Are the moisture contents of the sediment before and after repair, %;

[0043] S r1 、S r2 : Are the saturations of the sediment before and after repair, %;

[0044] r1: Is the capacity of the natural sediment below the water surface, kN / m 3 ;

[0045] C TN 、 TP : Are the concentrations of TN and TP in the sediment, mg / kg;

[0046] X: Is the dosage of the repair agent; mg;

[0047] M2, V: Are the weight of the sediment and the volume corresponding to the treatment link, kN and m 3 ;

[0048] The central controller 3-2 transmits the calculation result X to the multi-layer storage tank 2-8 and controls the multi-layer storage tank 2-8 to add an equal amount of repair agent to the dosing tank 2-5.

[0049] Step 3) The hydraulic detection mechanism 2-2 measures the flow velocity of the lake and transmits the measurement result to the central controller 3-2. The central controller 3-2 issues an instruction to the pulser 2-7 according to the magnitude of the lake flow velocity, and controls the ecological plate to extend to an appropriate length R. The calculation method is as shown in Equation 8:

[0050] R = v × L1 × H1 (Equation 8)

[0051] Note: v: water flow velocity

[0052] L1: length of the stirring blade

[0053] H1: sludge thickness

[0054] Under the action of the hydraulic cylinder 2-6, the pulser 2-7 injects the repair agent in the dosing cylinder 2-5 into the sediment to be repaired for sediment repair. At the same time, the stirring device at the bottom of the pulser 2-7 starts to work to stir the sediment.

[0055] Step 4) The hydraulic sampling system 2-3 collects the repaired sediment into the detector 2-4 for detection. The detector 2-4 transmits the detection data to the central controller 3-2. The central controller 3-2 determines whether to proceed to the next step or repeat Step 2) according to the detection result;

[0056] Step 5) The detector 2-4 detects the algal species density D in the repaired sediment and transmits the detection data to the central controller 3-2. The central controller 3-2 determines the algal species density D (taking cyanobacteria as an example) in the sediment. The determination method is as shown in Equation 9:

[0057]

[0058] Note: D: density of algal species; cells / L;

[0059] When the output is 1, the central controller 3-2 determines that the algal species density in the sediment 1-1 exceeds the standard, and then controls the multi-layer storage tank 2-8 to add the algal species remover to the dosing cylinder 2-5, and injects the algal species remover into the sediment through the pulser 2-7.

[0060] When the output is 0, proceed to the next step;

[0061] Step 6) The central controller 3-2 controls the multi-layer storage tank 2-8 to add the submerged plant seeds to the dosing cylinder 2-5, injects the submerged plant seeds into the sediment through the pulser 2-7, and starts the hydraulic leveling mechanism 2-1 to level the sediment with the seeds added.

[0062] Compared with the prior art, the advantages of the present invention are as follows:

[0063] (1) The device of the present invention uses a detection and repair system and a control and supply system to intelligently clean and repair the lake sediment pollution, ensuring the ecological health of the lake environment.

[0064] (2) In response to the shear stress changes at different water levels, the present invention uses a stabilizer to provide stable protection for the underwater device, ensuring the service life of the device.

[0065] (3) In response to the non-constant changes in the lake flow rate, the lake depth and sediment thickness are accurately measured, and the repair agent is reasonably added according to different pollution situations; compared with the traditional method, it is more intelligent and precise, greatly reducing the sediment repair cost.

[0066] (4) In response to different sediment pollution situations, advanced artificial intelligence robot technology is used to detect and determine the complex sediment environment, and finally an intelligent, efficient and scientific sediment repair system and method are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is a plan view of a non-constant water level pulse sediment repair device;

[0068] Figure 2 It is a schematic structural diagram of a hydraulic leveling mechanism;

[0069] Figure 3 It is a schematic structural diagram of a hydraulic detection mechanism;

[0070] Figure 4 It is a schematic structural diagram of a hydraulic sampling system;

[0071] Figure 5 It is a schematic structural diagram of a pulsator;

[0072] Figure 6 It is an A-A sectional view of a non-constant water level pulse sediment repair device;

[0073] Figure 7 It is a flow chart of a non-constant water level pulse sediment repair process.

[0074] In the figure:

[0075] 1 - sediment system, 2 - detection and repair system, 3 - control and supply system;

[0076] 1-1 - sediment, 1-2 - water body, 1-3 - sand slope;

[0077] 1-1-1 polluted sediment layer, 1-1-2 transition layer, 1-1-3 normal tidal sediment layer;

[0078] 2-1 - hydraulic leveling mechanism: 2-1-1 vehicle frame, 2-1-2 earthmoving device, 2-1-3 crawler, 2-1-4 hydraulic pusher;

[0079] 2-2 Hydraulic detection mechanism: 2-2-1 Profiler, 2-2-2 Positioning system, 2-2-3 Control component, 2-2-4 Hydraulic pusher;

[0080] 2-3 Hydraulic sampling system: 2-3-1 Sludge grab bar, 2-3-2 Hydraulic telescopic rod, 2-3-3 Water filter;

[0081] 2-4 Detector;

[0082] 2-5 Dosing tank: 2-5-1 Sediment remediation agent, 2-5-2 Submerged plant seeds, 2-5-3 Algae species remover, 2-6 Hydraulic cylinder;

[0083] 2-7 Pulser: 2-7-1 Pulse tube, 2-7-2 Ecological board, 2-7-3 Isolation ring, 2-7-4 Sediment stirring blade 2-7-5 Telescopic tube;

[0084] 2-8 Multi-layer storage tank;

[0085] 3-1 Stabilizer, 3-2 Central controller, 3-3 Power unit. Detailed implementation manners

[0086] The technical solution of the present invention will be further introduced through the following specific embodiments. The present invention takes the detection and repair system 2 as the core, so the embodiments specifically introduce the steps and methods of detection and repair.

[0087] Refer to Figure 1 、 2 As shown, when the non-constant water level pulse sediment remediation device is operating, part of it is placed above the water surface and part of it is placed below the water surface; among them, the stabilizer 3-1, the central controller 3-2, the power unit 3-3, the multi-layer storage tank 2-8, the dosing tank 2-5, the hydraulic cylinder 2-6, and the detector 2-4 are placed on a small boat, while the pulser 2-7, the hydraulic sampling system 2-3, the hydraulic detection mechanism 2-2, and the hydraulic leveling mechanism 2-1 are located below the water surface. The components on the small boat are connected to the central controller and operate through the regulation of the central controller. One end of the hydraulic detection mechanism is connected to the detector, and the other end is provided with a pressure sensor and an area measurement device. When the detector touches the surface and bottom of the sediment, the pressure sensor sends a signal to the central controller to convey the depth information, and at the same time calculates the sediment remediation area and transmits the calculation result to the central controller.

[0088] Embodiment 1

[0089] Refer to Figure 1 As shown, the non-constant flow rate pulse sediment remediation device includes three systems: the sediment system 1, the detection and repair system 2, and the control and supply system 3.

[0090] Among them, the sediment system 1 includes sediment 1-1, water body 1-2, and sand dune 1-3. The sediment 1-1 includes, from top to bottom, a polluted sediment layer 1-1-1, a transition layer 1-1-2, and a normal tidal sediment layer 1-1-3. The sediment 1-1 is mainly lake polluted sediment, and the water body 1-2 is an unsteady water body with continuously changing water levels. The sand dune 1-3 is a geomorphic structure formed by the accumulation of gravel in the riverbed. It is arranged in a parallel shape or distributed in scales. The two side slopes of the sand dune are asymmetric, with the steep slope facing the downstream of the river, reaching about 30 degrees, and the slope on the water-facing side is relatively gentle.

[0091] The detection and repair system 2 includes a hydraulic leveling mechanism 2-1, a hydraulic detection mechanism 2-2, a hydraulic sampling system 2-3, a detector 2-4, a dosing cylinder 2-5, a hydraulic cylinder 2-6, a pulsator 2-7, and a multi-layer storage tank 2-8. A pressure sensor is installed at the end of the hydraulic detection mechanism 2-2, with a sensitivity of 1-2 mV / V.

[0092] The control and supply system 3 includes a stabilizer 3-1, a central controller 3-2, and a power device 3-3.

[0093] The stabilizer 3-1 is connected to the central controller 3-2 to maintain the stability of the underwater device and reduce the damage of the water shear stress to the device.

[0094] The hydraulic cylinder 2-6 is connected to the dosing cylinder 2-5 and the pulsator 2-7 to provide a certain amount of hydraulic pressure to accelerate the dosing of dosing materials such as repair agents.

[0095] The power device 3-3 provides the main driving force for the devices used in this system, with a maximum thrust of 5000-6000 N, a propulsion speed of 0.03-0.12 m / s, and an idling speed of about 60-120 r / min.

[0096] Figure 2 It is a schematic structural diagram of the hydraulic leveling mechanism. Refer to Figure 2 As shown, the hydraulic leveling mechanism (2-1) includes a frame 2-1-1, a bulldozing device 2-1-2, a track 2-1-3, and a hydraulic pusher 2-1-4. The longitudinal beam of the frame is formed by connecting multiple longitudinal beam segments along its length from front to back, with an overall triangular shape, and a runner is connected at the connection. The track is installed between the runners, and the bulldozing device is arranged at the front end of the frame, with its bottom edge flush with the bottom edge of the track to improve the leveling efficiency. The hydraulic pusher is connected to the rear runner to provide power for operation. The motor shaft and the push rod of the hydraulic pusher are both surface-hardened by chromium plating, greatly extending the service life of the seals and being suitable for underwater operations.

[0097] Figure 3 It is a schematic structural diagram of the hydraulic detection mechanism. Refer to Figure 3As shown, the hydraulic detection mechanism 2-2 includes: a profiler 2-2-1, a positioning system 2-2-2, a hydraulic pusher 2-2-4, and a control component 2-2-3. The positioning system adopts a geodetic receiver and performs relative positioning based on carrier phase observation values, with high positioning accuracy. The profiler is placed at the front end of the hydraulic detection mechanism to obtain a high-resolution stratigraphic image of the lake bed. The motor shaft and push rod of the hydraulic pusher are both hard-chrome plated on the surface, which greatly extends the life of the seal and is suitable for underwater operations. The control component is placed inside the hydraulic detection mechanism to realize interactive control between the various components.

[0098] Figure 4 This is a schematic diagram of the hydraulic sampling system. Figure 4 As shown, the hydraulic sampling system (2-3) includes: a sludge grab bar 2-3-1, a hydraulic telescopic bar 2-3-2, and a water filter 2-3-3. The sludge grab bar is installed below the hydraulic telescopic bar, and the water filter is installed between the sludge grab bars. The surface of the sludge grab bar is hard chrome plated, which greatly prolongs the service life of the seal and is suitable for underwater operations. The hydraulic telescopic bar can be freely extended and controlled to grab the bottom mud. The water filter uses a mesh to filter water and is equipped with a compression device to compress a large amount of water in the sludge.

[0099] Figure 5 This is a schematic diagram of the pulse generator. Figure 5 As shown, the pulser 2-7 includes: a pulse tube 2-7-1, an ecological plate 2-7-2, an isolation ring 2-7-3, a bottom mud stirring blade 2-7-4 and a telescopic tube 2-7-5. The pulse tube adopts a double-layer structure, with the outer layer separated by a partition, a total of three layers, which can hold three kinds of reagents, respectively used for the addition of repair agents, algae removers and submerged plant seeds. An ecological plate is installed at the lower end, and the addition of reagents is achieved by controlling the speed of reagent addition. The stirring blades are located around the isolation ring and are evenly distributed. The surface is hard chrome-plated, which greatly extends the life of the seal and is suitable for underwater operations. The telescopic tube is located at the end of the pulse tube, with a large upper end and a small lower end, which is convenient for extending into the bottom mud. According to the lake flow rate information measured by the flow rate measuring device, it extends the corresponding length to prevent the bottom mud from floating up.

[0100] An operating method of a non-constant flow rate pulse sediment remediation device comprises the following steps:

[0101] Step 1) The sediment system 1 has not been effectively monitored and managed for a long time, and the sediment 1-1 has different degrees of pollution and needs to be cleaned and repaired; before the device officially works, the hydraulic detection mechanism 2-2 of the monitoring and repair system 2 first detects the target sediment 1 and transmits the detection data to the central controller 3-2.

[0102] The central controller 3-2 feeds back the detection data to the hydraulic leveling mechanism 2-1, and the hydraulic leveling mechanism 2-1 levels the sand slope 1-3.

[0103] Step 2) The hydraulic sampling system 2-3 starts to work, collects an appropriate amount of bottom sediment 1-1 and sends it to the detector 2-4 for detection. The detector 2-4 transmits the detection data to the central controller 3-2. The central controller 3-2 first compares the measured value with the national average value and the standard value of the secondary level (pH>7.5) in the soil environmental quality standard to calculate the pollution index, calculates the average index Pi of the sample, the relative comprehensive pollution index M, and determines the M value. The determination method is as shown in Equation 1:

[0104]

[0105]

[0106] Note: I i max: The maximum value of the pollution index of each detection item of the sample;

[0107] I0: The comprehensive pollution index calculated from the average value of the detection items in the bottom layer of the lake bottom;

[0108] I: The comprehensive pollution index;

[0109] After calculation, M = 1.2, and the output result is 1. The central controller 3-2 determines that the bottom sediment 1-1 is polluted, then starts the hydraulic detection mechanism 2-2 to measure the volume V of the bottom sediment collected in the detector, and transmits the measurement data to the central controller 3-2. The central controller 3-2 calculates the data to obtain the dosage X of the repair agent. The calculation methods are as shown in Equations 3, 4, 5, 6, and 7:

[0110] k m =(1 + w1) / (1 + w2) (Equation 3)

[0111] V H = k M M2 / r1 (Equation 4)

[0112] k v = S r2 (S r1 + w1G s ) / S r1 (S r2 + w2G s ) (Equation 5)

[0113] V = V2 / k v (Equation 6)

[0114] M = V × C TN、TP (Equation 7)

[0115] Note: V H : The volume of the sediment after repair is converted to the volume underwater, m 3 ;

[0116] k v : Is the volume conversion coefficient;

[0117] k m : Is the weight conversion coefficient;

[0118] G s : Is the specific gravity of the bottom soil. For general cohesive soil, it can be taken as 2.74;

[0119] w1, w2: Are the water contents of the sediment before and after repair respectively, %;

[0120] S r1 、S r2 : Are the saturations of the sediment before and after repair respectively, %;

[0121] r1: Is the capacity of the natural bottom sediment underwater, kN / m 3 ;

[0122] C TN 、 TP : Are the concentrations of TN and TP in the sediment, mg / kg;

[0123] X: Is the dosage of the repair agent; mg;

[0124] M2, V: Are the weight of the sediment and the volume corresponding to the treatment link respectively, kN and m 3 ;

[0125] After calculation, the dosage of the repair agent is 20 ml;

[0126] The central controller 3-2 transmits the calculation result of 20 ml to the multi-layer storage tank 2-8 and controls the multi-layer storage tank 2-8 to add 20 ml of the repair agent to the dosing tank 2-5.

[0127] Step 3) The hydraulic detection mechanism 2-2 measures the flow rate of the water body 1-2 (lake) and transmits the measurement result to the central controller 3-2. The central controller 3-2 issues an instruction to the pulser 2-7 according to the size of the lake flow rate and controls the elongation radius of the ecological plate to R. The calculation method is as shown in Equation 8:

[0128] R = v × L1 × H1 (Equation 8)

[0129] Note: v: Water flow velocity

[0130] L1 Stirring blade length

[0131] H1 Sludge thickness

[0132] After calculation, the elongation radius R of the ecological board is 3.2 m.

[0133] Under the action of the hydraulic cylinder 2-6, the pulser 2-7 injects the repair agent in the dosing cylinder 2-5 into the sediment to be repaired for sediment repair. At the same time, the stirring device at the bottom of the pulser 2-7 starts to work to stir the sediment with the repair agent added, accelerating the repair rate.

[0134] Step 4) The hydraulic sampling system 2-3 collects the repaired sediment into the detector 2-4 for detection, and the detector 2-4 transmits the detection data to the central controller 3-2;

[0135] After calculation, M ≤ 1.0, the repair of sediment pollution is achieved, and the next step is carried out.

[0136] Step 5) The detector 2-4 detects the algal species density D in the repaired sediment and transmits the detection data to the central controller 3-2. The central controller 3-2 determines the algal species density D (taking cyanobacteria as an example) in the sediment, and its determination method is as formula 9:

[0137]

[0138] Note: D: Density of algal species; cells / L;

[0139] After determination, D = 6×10 7 , the output result is 1. The central controller 3-2 determines that the algal species density in the sediment 1-1 exceeds the standard, and then controls the multi-layer storage tank 2-8 to add the algal species remover to the dosing cylinder 2-5, and injects the algal species remover into the sediment through the pulser 2-7.

[0140] Step 6) The central controller 3-2 controls the multi-layer storage tank 2-8 to add the submerged plant seeds to the dosing cylinder 2-5, injects the submerged plant seeds into the sediment through the pulser 2-7, and starts the hydraulic leveling mechanism 2-1 to level the sediment with the seeds added.

[0141] Step 7) The hydraulic sampling system 2-3 collects the repaired sediment into the detector 2-4 for detection, and the detector 2-4 transmits the detection data to the central controller 3-2. The central controller 3-2 first compares the measured value with the national average value and the standard value of the second level (PH > 7.5) in the soil environmental quality standard to calculate the pollution index, calculates the average index Pi of the sample, the relative comprehensive pollution index M, and determines the M value. Its determination method is as formulas 1 and 2:

[0142]

[0143]

[0144] Note: I imax: The maximum value of the pollution index for each test item of the sample;

[0145] I0: The comprehensive pollution index calculated from the average value of the test items in the bottom layer of the lake bottom;

[0146] I: The comprehensive pollution index;

[0147] After calculation, M = 0.8, and the output result is 0. The sediment of the lake bottom is purified. The central controller 3-2 determines that the pollution in the sediment 1-1 meets the standard, and the power device 3-3 starts, and the device leaves the current water area.

[0148] Through the above steps, the repair of the sediment is completed.

[0149] The above is the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle described in the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A non-constant flow rate pulsed sediment remediation device, characterized in that It includes three subsystems: a sediment system (1), a detection and repair system (2), and a control and replenishment system (3); Among them, the sediment system (1) includes sediment (1-1), water body (1-2), and sand dune (1-3); The sediment (1-1) is mainly polluted lake sediment; The water body (1-2) is an unsteady water body with continuously changing water levels; The sand dune (1-3) is a geomorphic structure formed by the accumulation of gravel in the riverbed; The detection and repair system (2) includes a hydraulic leveling mechanism (2-1), a hydraulic detection mechanism (2-2), a hydraulic sampling system (2-3), a detector (2-4), a dosing cylinder (2-5), a hydraulic cylinder (2-6), a pulsator (2-7), and a multi-layer storage tank (2-8); A pressure sensor is installed at the end of the hydraulic detection mechanism (2-2), with a sensitivity of 1 to 2 mV / V; Among them, the multi-layer storage tank (2-8) and the pulsator (2-7) are connected to the central controller. The central controller controls the dosing material output X of the multi-layer storage tank and the depth L of the ecological board of the pulsator (2-7) extending into the sediment (1-1); The hydraulic cylinder (2-6) is connected to the dosing cylinder (2-5) and the pulsator (2-7) to provide hydraulic pressure to promote the dosing of the dosing material. The dosing material output from the multi-layer storage tank (2-8) to the dosing cylinder is injected into different sediment depths through the pulsator (2-7) under the action of the hydraulic cylinder (2-6) and stirred to carry out targeted repair; The hydraulic sampling system (2-3) is connected to the detector (2-4) to transport the collected sediment samples to the detector (2-4). The detector transports the data of the repaired sediment to the connected central controller. The data includes, but is not limited to, the algal species density D, the volume V of the original sediment, and the pollution index; The central controller is connected to the hydraulic detection mechanism and the hydraulic leveling mechanism. The hydraulic detection mechanism (2-2) contacts the sediment and transports the information on the existence of sand dunes to the central controller. The central controller controls the hydraulic leveling mechanism to level the sand dunes; The control and replenishment system (3) includes a stabilizer (3-1), a central controller (3-2), and a power device (3-3), where; The stabilizer (3-1) is connected to the central controller (3-2) to maintain the stability of the underwater device and reduce the damage of the shear stress of water to the device; The power device (3-3) provides driving force for this system, with a maximum thrust of 5000 - 6000 N, a propulsion speed of 0.03 - 0.12 m / s, and an idling speed of 60 - 120 r / min; The sediment (1-1) includes, from top to bottom: a polluted sediment layer (1-1-1), a transition layer (1-1-2), and a normal tidal sediment layer (1-1-3); The sand dune (1-3) is a geomorphic feature formed by the accumulation of gravel in the riverbed. It is arranged in parallel or distributed in scales. The two side slopes of the sand dune are asymmetric, with the steep slope facing the downstream of the river, reaching about 30 degrees, and the slope on the water-facing side is relatively gentle; The inner tube of the pulse device (2-7) is divided into three parts along the radial direction, which are respectively used for the dosing of the repair agent, the algal species remover, and the submersed plant seeds. An ecological plate and a stirring device are installed at the lower end of the pulse device. The ecological plate extends a corresponding length according to the lake flow velocity information measured by the detector (2-4) to prevent the bottom mud from floating and to stir the bottom mud to be repaired, thereby accelerating the repair efficiency.

2. The operation process of the non-constant flow rate pulse sediment remediation device according to claim 1, characterized in that It includes the following steps: Step 1) First, the hydraulic detection mechanism (2-2) of the monitoring and repair system (2) detects the target bottom mud (1-1) and transmits the detection data to the central controller (3-2); The central controller (3-2) feeds back the detection data to the hydraulic leveling mechanism (2-1), and the hydraulic leveling mechanism (2-1) levels the sand slope (1-3); The detection data includes but is not limited to: the volume V of the original bottom mud, the bottom mud thickness H1, the water depth H2, and the water flow velocity v; Step 2) The hydraulic sampling system (2-3) starts to work, samples the bottom mud (1-1) and sends it to the detector (2-4) for detection. The detector (2-4) transmits the detection data to the central controller (3-2). The central controller (3-2) first compares the measured value of the bottom mud pollutant with the bottom mud pollution limit value to calculate the pollution index, calculates the average index Pi of the sample and the relative comprehensive pollution index M, and makes a judgment on the M value. The judgment method is as shown in Formulas 1 and 2; The bottom mud pollution limit value adopted in this step refers to the national average value and the secondary standard value in the Soil Environmental Quality Standard; Note: I i max: The maximum value of the pollution index of each test item of the sample; I0: The comprehensive pollution index calculated from the average value of the detection items in the bottom layer of the lake bottom; I: The comprehensive pollution index; When the output is 0, the central controller (3-2) determines that there is no pollution in the bottom mud (1-1); then go to Step 5); When the output is 1, the central controller (3-2) determines that the bottom mud (1-1) is polluted, then starts the hydraulic detection mechanism (2-2) to measure the volume V of the bottom mud and transmits the measurement data to the central controller (3-2). The central controller (3-2) calculates the data to obtain the dosing amount X of the repair agent. The calculation method is as shown in Formulas 3-7: k m = (1 + w1) / (1 + w2) (Equation 3) V H = k M M2 / r1 (Equation 4) k v = S r2 (S r1 + w1G s ) / S r1 (S r2 + w2G s ) (Equation 5) V = V2 / k v (Equation 6) X = V × C TN、TP (Equation 7) Note: V H : The volume of the sediment after repair is converted to the volume below the water surface, m 3 ; k v : is the volume conversion coefficient; k m : is the weight conversion factor; G s : Specific gravity of bottom soil, generally 2.74 for cohesive soil; w1, w2: The moisture contents before and after the bottom mud repair, respectively, %; S r1 and S r2 : are the saturations before and after sediment remediation, respectively, %. r1: Capacity of natural bottom sediment below water, kN / m 3 ; C TN and TP : the concentrations of TN and TP in the sediment, mg / kg; X: The dosing amount of the repair agent; mg; M2 and V: respectively represent the weight of sediment and volume corresponding to the rectification link, in kN and m³ 3 ; The central controller (3-2) transmits the calculation result X to the multi-layer storage tank (2-8) and controls the multi-layer storage tank (2-8) to dose the corresponding amount of the repair agent into the dosing cylinder (2-5); Step 3) The hydraulic detection mechanism (2-2) measures the lake flow velocity and transmits the measurement result to the central controller (3-2). The central controller (3-2) issues an instruction to the pulse device (2-7) according to the magnitude of the lake flow velocity and controls the ecological plate to extend to the corresponding radius R. The calculation method is as shown in Formula 8: R = v × L1 × H1 (Formula 8) Note: v: Water flow velocity, L1: Stirring blade length, H1: Sludge thickness; The pulse device (2-7) injects the repair agent in the dosing cylinder (2-5) into the bottom mud to be repaired under the action of the hydraulic cylinder (2-6) for bottom mud repair. At the same time, the stirring device at the bottom of the pulse device (2-7) starts to work to stir the bottom mud; Step 4) The hydraulic sampling system (2-3) collects the repaired sediment and sends it to the detector (2-4) for detection. The detector (2-4) transmits the detection data to the central controller (3-2), and the central controller (3-2) determines whether to proceed to the next step or repeat Step 2) according to the detection results; Step 5) The detector (2-4) detects the algal species density D in the repaired sediment and transmits the detection data to the central controller (3-2). The central controller (3-2) determines the algal species density D in the sediment, and the determination method is as shown in Equation 9: Note: D: density of algal species; cells / L; When the output is 1, the central controller (3-2) determines that the algal species density in the sediment (1-1) exceeds the standard, and then controls the multi-layer storage tank (2-8) to add the algal species remover to the dosing tank (2-5), and injects the algal species remover into the normal tidal sediment layer (1-1-3) through the pulsator (2-7); When the output is 0, proceed to the next step; Step 6) The central controller (3-2) controls the multi-layer storage tank (2-8) to add submerged plant seeds to the dosing tank (2-5), and injects the submerged plant seeds into the normal tidal sediment layer (1-1-3) through the pulsator (2-7), and then starts the hydraulic leveling mechanism (2-1) to level the sediment with the added seeds.

3. The operating method of a non-constant flow rate pulsed sediment remediation device according to claim 2, characterized in that: When the device is operating, part of it is placed on the water surface and part is placed underwater. Among them, the stabilizer, central controller, power device, multi-layer storage tank, dosing tank, hydraulic cylinder, and detector are placed on a small boat and operate under the regulation of the central controller. One end of the hydraulic detection mechanism is connected to the detector, and the other end is provided with a pressure sensor and an area measurement device. When the detector touches the surface and bottom of the sediment, the pressure sensor sends a signal to the central controller to convey the depth information, and at the same time measures the sediment repair area and transmits the calculation result to the central controller.

4. The non-constant flow rate pulsed sediment remediation device according to claim 1, characterized in that: The hydraulic sampling system (2-3) includes: a sludge grab bar (2-3-1), a hydraulic telescopic rod (2-3-2), and a water filter (2-3-3); the sludge grab bar is installed below the hydraulic telescopic rod, and the water filter is installed between the sludge grab bars. The hydraulic telescopic rod can freely stretch and control the grab bar to grab the sediment; the water filter uses a mesh filter screen and is equipped with a compression device to compress the water in the sludge.

5. The non-constant flow rate pulsed sediment remediation device according to claim 1, wherein: The pulsator (2-7) includes: a pulse tube (2-7-1), an ecological plate (2-7-2), a spacer ring (2-7-3), a sediment stirring blade (2-7-4), and a telescopic tube (2-7-5); the pulse tube adopts a double-layer structure, and the outer layer is separated by partitions, with a total of three layers, which are respectively used to place three different agents, and the addition of the agents is realized by controlling the agent addition speed; the stirring blades are evenly distributed around the spacer ring, and the telescopic tube is located at the end of the pulse tube, with a large upper end and a small lower end, which is convenient for extending into the sediment.

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