A preparation system and preparation process for pumpable pouring backfill solidified soil

Abstract

The present invention discloses a preparation system and a preparation process for pumpable pouring backfill solidified soil, comprising an original sludge conveying device and a solidified material adding device for adding original sludge and solidified material to a forced mixer, respectively, and a backfilling device connected to a backfilling field. The present invention controls and adjusts the wet density of the original sludge to obtain a uniform and stable adjusted sludge, minimizes the influence of the original sludge properties due to property fluctuations, and ensures the quality and flow value of the solidified soil for pouring backfill.

Description

Technical Field

[0001] The present invention relates to the field of sludge and solidified soil treatment, and more specifically, to a preparation system and a preparation process for pumpable pouring backfill solidified soil. Background Art

[0002] In order to improve the water quality of rivers and lakes, ensure the normal flood discharge capacity of rivers, and keep the waterways and ports unobstructed, countries around the world, including my country, are carrying out large-scale dredging and dredging projects. According to statistics, the amount of dredged silt produced in the Pearl River Delta region of my country alone reaches 80 million m3 per year. 3 The amount of silt dumped into the ocean in my country is close to 200 million m 3 , and a large amount of dredged silt will still be generated in water conservancy and marine engineering in the next decade, and its treatment has become an issue that cannot be avoided.

[0003] The dredged sludge produced in dredging projects is usually disposed of by stacking or discarding. On the one hand, it not only occupies a large amount of land and causes a large amount of land resources to be wasted, but also dumping it into the open sea will seriously affect the effective utilization of marine resources and cause irreparable damage to the marine environment. On the other hand, most dredged sludge contains pollutants such as heavy metals and organic matter. If it is not effectively treated, it will inevitably cause secondary pollution to the surrounding environment.

[0004] In recent years, silt solidification treatment technology has gradually developed. It is often used to mix silt with cement, lime, fly ash or special soil solidifiers and other cementitious materials, and then undergo a series of physical and chemical reactions to improve the mechanical indicators of the silt to form a backfill material that meets the engineering requirements. This method can effectively reduce pollution such as heavy metals and organic matter. However, due to the nature and water content of the silt, the quality requirements of the solidified soil cannot be guaranteed. When the water content of the silt increases, the strength of the solidified soil will be significantly reduced, resulting in unqualified quality; when the water content of the silt decreases, the flow value of the solidified soil will be significantly reduced, resulting in difficulty in pumping; in addition, the current utilization of solidified soil is mainly based on paving and rolling operations, which have complicated procedures, long construction periods, high costs, and are difficult to meet the requirements of underwater backfill. Summary of the invention

[0005] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0006] Another object of the present invention is to provide a preparation system and preparation process for pumpable backfill solidified soil. By controlling and adjusting the wet density of the original sludge, uniform and stable adjusted sludge is obtained, thereby minimizing the impact of the original sludge properties caused by property fluctuations and ensuring the quality and flowability of the solidified soil for backfilling.

[0007] In order to achieve these purposes and other advantages according to the present invention, a preparation system for pumpable pouring backfill solidified soil is provided, comprising an original sludge conveying device and a solidified material adding device for adding original sludge and solidified material to the interior of a forced mixer, respectively, and a backfilling device connected to a backfilling field, wherein:

[0008] The original sludge conveying device includes:

[0009] A weigh feeder, which is fixedly arranged and used to control the weight of the original sludge output;

[0010] A mud dispersing machine is fixedly arranged by a bracket, and a feed port of the mud dispersing machine is connected to the weighing feeder;

[0011] A first screw conveyor, whose feed port is connected to the discharge port of the demudifier;

[0012] A wet density measuring instrument, which is arranged inside the desludging machine and is used to monitor the wet density of the original sludge;

[0013] The curing material adding device includes:

[0014] A second screw conveyor, which is fixedly arranged;

[0015] A weighing hopper, which is fixedly arranged just above the second screw conveyor and is connected to a feed port of the second screw conveyor;

[0016] A first weighing sensor is disposed between the weighing hopper and the second screw conveyor to obtain the weight of the weighing hopper;

[0017] The forced mixer includes:

[0018] A mixing barrel, which is arranged on the ground, wherein the discharge ports of the first screw conveyor and the second screw conveyor are both connected to the feed port of the mixing barrel, and a discharge port is arranged at the bottom of the mixing barrel;

[0019] A stirring shaft, which is fixedly arranged inside the stirring barrel;

[0020] The backfill device includes:

[0021] A tailings filling pump is arranged on the ground, and a feed port of the tailings filling pump is connected with a discharge port at the bottom of the mixing barrel;

[0022] A conveying pipeline, one end of which is connected to the discharge port of the tailings filling pump, and the other end of which is connected to the backfilling field.

[0023] Preferably, a water adding system is also included, which includes:

[0024] Water storage tanks;

[0025] a first water pipe, whose water inlet is connected to the water storage tank and whose water outlet is connected to the feed inlet of the demudifier;

[0026] The water inlet of the second water pipe is connected to the water storage tank, and the water outlet is connected to the feed port of the second screw conveyor.

[0027] Preferably, the weigh feeder comprises:

[0028] frame;

[0029] A mud storage hopper is fixedly arranged on the frame and is used to store the original mud;

[0030] A third screw conveyor is fixedly arranged on the frame and is located directly below the mud storage hopper, wherein the feed port of the third screw conveyor is communicated with the discharge port of the mud storage hopper, and the discharge port of the third screw conveyor is communicated with the feed port of the mud dissolving machine;

[0031] A second weighing sensor is arranged at the bottom of the frame to obtain the weight of the frame, the third screw conveyor and the mud storage bucket.

[0032] Preferably, it further comprises a stirring device, which is fixedly arranged inside the demudder and is used for stirring the original sludge input into the demudder.

[0033] Preferably, the stirring device includes two first rotating rods, which are oppositely arranged at two ends of the mud dispersing machine, one end of any first rotating rod passes through one side of the mud dispersing machine and is rotatably connected to one side of the bracket, and the other end is rotatably connected to the other side of the bracket through a first driving device; a plurality of first rake rods are fixedly provided on the outer side wall of any first rotating rod, and are circumferentially spaced along the length direction of the first rotating rod.

[0034] Preferably, the curing material adding device further comprises:

[0035] A powder silo, which is fixedly arranged and used to store solidified materials;

[0036] A fourth screw conveyor, whose feed port is communicated with the discharge port of the powder bin, and the discharge port of the fourth screw conveyor is communicated with the feed port of the weighing hopper.

[0037] Preferably, it further comprises a grille which is fixedly arranged on the top of the mud storage hopper, and the aperture of the grille is less than 10 cm.

[0038] Preferably, it further comprises an agitator, which is arranged inside the mud storage hopper, and the agitator comprises:

[0039] A second rotating rod, one end of which passes through one side of the mud storage bucket and is rotatably connected to one side of the frame, and the other end of which is rotatably connected to the other side of the frame through a second driving device;

[0040] A plurality of second rake rods are fixedly arranged on the outer side wall of the second rotating rod and are circumferentially spaced along the length direction of the second rotating rod.

[0041] Preferably, it further comprises an operation controller, which comprises:

[0042] A storage unit, which is used to store the wet density target value of the original sludge, the wet density target value of the solidified soil, the weight of the original sludge delivered by the weighing feeder each time, the liquid limit value of the original sludge, and the relationship between the amount of water added to the original sludge and the wet density;

[0043] A calculation unit, which obtains data measured by a wet density measuring instrument and compares the data with a target value of wet density of the original sludge, calculates the amount of water added according to the relationship between the amount of water added and the wet density of the original sludge, and compares the wet density of the original sludge with the target value of wet density of the solidified soil to calculate the amount of solidified material added;

[0044] A control unit, which obtains the weighing data of the second weighing sensor and controls the output weight of the original sludge by the weighing feeder, and the control unit also obtains the weighing data of the first weighing sensor and controls the output weight of the solidifying material by the solidifying material adding device and controls the water adding system;

[0045] Wherein, the storage unit, the calculation unit and the control unit transmit information to each other.

[0046] The present invention also provides a preparation process for pumpable pouring backfill solidified soil, comprising the following steps:

[0047] Step 1: The above-mentioned preparation system is assembled on the ground, and the wet density target value of the original sludge, the wet density target value of the solidified soil, the weight of the original sludge delivered by the weighing feeder each time, the liquid limit value of the original sludge obtained by the test, and the relationship between the water addition amount and the wet density of the original sludge are preset in the storage unit of the operation controller;

[0048] Step 2: The control unit of the operation controller controls the weighing feeder to convey the original sludge to the desludge machine in a quantitative manner each time. At the same time, the wet density measurement at the bottom of the desludge machine measures the wet density of the original sludge input to the desludge machine, and feeds the measured data back to the calculation unit of the operation controller;

[0049] Step 3: The calculation unit of the operation controller compares the data fed back by the wet density measuring instrument with the preset wet density target value of the original sludge. When the fed back data exceeds the preset target value, water needs to be added to the mud dispersing machine, otherwise no water is added. When water needs to be added, the calculation unit calculates the amount of water added according to the relationship between the amount of water added and the wet density of the original sludge, and transmits it to the control unit. The control unit controls the water adding system to add the calculated amount of water to the mud dispersing machine according to the calculated amount of water added, and adjusts the wet density of the original sludge. At the same time, the stirring device stirs the original sludge and water to obtain adjusted sludge. When the wet density of the adjusted sludge reaches the preset target value in the storage unit of the operation controller, the water addition is stopped;

[0050] Step 4: After the water is added, the calculation unit of the operation controller compares the wet density of the adjusted sludge with the wet density target value of the solidified soil. If the wet density of the adjusted sludge is less than the wet density target value of the solidified soil, the calculation unit of the operation controller calculates and analyzes the amount of solidified material added;

[0051] Step 5: The adjusted sludge in the mud dispersing machine is conveyed to the forced mixer through the first screw conveyor. At the same time, the solidified material in the powder bin is added to the weighing hopper through the fourth screw conveyor. The first weighing sensor at the bottom of the weighing hopper dynamically weighs the weight of the added solidified material, and transmits the weighing result to the control unit of the operation controller in real time. When the weight weighed by the first weighing sensor is consistent with the added amount of the solidified material calculated and analyzed in the calculation unit, the fourth screw conveyor stops adding the solidified material to the weighing hopper, and the solidified material in the weighing hopper is conveyed to the forced mixer through the second screw conveyor.

[0052] Step 6: Start the forced mixer and maintain the preset stirring time to evenly mix the adjusted sludge and the solidifying material to obtain the adjusted solidified soil, and then compare the wet density of the adjusted solidified soil with the wet density target value of the solidified soil. If the wet density of the adjusted solidified soil is still less than the wet density target value of the solidified soil, continue to add the solidifying material to the forced mixer until the wet density of the adjusted solidified soil reaches the preset target value;

[0053] Step 7: The adjusted solidified soil whose wet density reaches the preset target value is discharged from the discharge port at the bottom of the forced mixer into the tailings filling pump, and transported to the backfill site through the conveying pipeline for pouring and backfilling.

[0054] The present invention has at least the following beneficial effects:

[0055] 1. The present invention controls and adjusts the wet density of the original silt to obtain the adjusted silt with uniform quality and stability, thereby minimizing the impact of the original silt properties caused by property fluctuations and ensuring the quality and flowability of the solidified soil for pouring and backfilling.

[0056] 2. The present invention improves the fluidity of the original sludge through the stirring device, realizes the uniformity of mixing the original sludge with the solidified material, meets the pumping pouring backfilling requirements of the solidified soil, is beneficial to the large-scale backfilling project of the solidified soil, and is convenient for construction.

[0057] 3. The present invention achieves the purpose of accurate batching by combining the second weighing sensor with the operation controller, thereby reducing the waste of solidifying materials and saving construction costs while ensuring the quality of the solidified soil poured backfill.

[0058] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a schematic diagram of the framework structure of the preparation process of the pumpable pouring backfill solidified soil of the present invention;

[0060] Figure 2 It is a structural schematic diagram of a system for preparing pumpable pouring backfill solidified soil according to the present invention;

[0061] Figure 3 It is a schematic structural diagram of the stirring device of the present invention.

[0062] Description of the Figures in the Specification:

[0063] 1. Desludging machine, 101. first screw conveyor, 102. wet density measuring instrument, 2. powder silo, 201. weighing hopper, 202. second screw conveyor, 203. first weighing sensor, 204. fourth screw conveyor, 3. forced mixer, 301. discharge port, 4. tailings filling pump, 401. conveying pipeline, 5. operation controller, 6. water storage tank, 601. first water pipe, 602. second water pipe, 7. mud storage hopper, 701. third screw conveyor, 702. second weighing sensor, 703. alarm, 704. grille, 705. stirrer, 8. stirring device, 801. first rotating rod, 802. first rake rod, 803. first driving device. DETAILED DESCRIPTION

[0064] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0065] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0066] like Figure 1-3 As shown, the present invention provides a preparation system for pumpable pouring backfill solidified soil, comprising an original sludge conveying device and a solidified material adding device for adding original sludge and solidified material to the interior of a forced mixer 3, respectively, and a backfilling device connected to a backfilling field, wherein:

[0067] The original sludge conveying device includes:

[0068] A weigh feeder, which is fixedly arranged and used to control the weight of the original sludge output;

[0069] A mud dispersing machine 1 is fixedly arranged by a bracket, and a feed port of the mud dispersing machine 1 is connected to the weighing feeder;

[0070] A first screw conveyor 101, whose feed port is connected to the discharge port of the demudifier 1;

[0071] A wet density measuring instrument 102, which is arranged inside the desludging machine 1 and is used to monitor the wet density of the original sludge;

[0072] The curing material adding device includes:

[0073] The second screw conveyor 202 is fixedly arranged;

[0074] A weighing hopper 201, which is fixedly arranged just above the second screw conveyor 202 and is connected to a feed port of the second screw conveyor 202;

[0075] A first weighing sensor 203, which is disposed between the weighing hopper 201 and the second screw conveyor 202 to obtain the weight of the weighing hopper 201;

[0076] The forced mixer 3 comprises:

[0077] A mixing barrel, which is arranged on the ground, wherein the discharge ports of the first screw conveyor 101 and the second screw conveyor 202 are both connected to the feed port of the mixing barrel, and a discharge port 301 is arranged at the bottom of the mixing barrel;

[0078] A stirring shaft, which is fixedly arranged inside the stirring barrel;

[0079] The backfill device includes:

[0080] A tailings filling pump 4 is arranged on the ground, and a feed port of the tailings filling pump 4 is connected to a discharge port 301 at the bottom of the mixing barrel;

[0081] The conveying pipeline 401 has one end connected to the discharge port of the tailings filling pump 4 and the other end connected to the backfilling field.

[0082] In the above technical scheme, the weighing feeder is fixedly arranged and connected with the mud distiller 1. The original sludge in the weighing feeder can be transported from the feed port of the mud distiller 1 to the mud distiller 1, and the discharge port of the mud distiller 1 is connected with the forced mixer 3 through the first screw conveyor 101. The original sludge in the mud distiller 1 can be transported to the forced mixer. The solidified material can be placed in the weighing hopper 201, and the discharge port of the weighing hopper 201 is connected with the feed port of the second screw conveyor 202, and the discharge port of the second screw conveyor 202 is connected with the feed port of the forced mixer 3, that is, the solidified material in the weighing hopper 201 can be transported to the forced mixer 3 through the second screw conveyor 202 to be mixed with the original sludge to obtain solidified soil, and backfilling and pouring are carried out. The properties of the original silt are different, and the wet density and strength of the solidified soil required are also different. Before preparing the solidified soil, it is necessary to test the relationship between the amount of water added to the original silt and the wet density, so as to preset the wet density target value of the original silt and the wet density target value of the solidified soil according to the flow value of the original silt. It can be known from the experiment that the amount of water added to the original silt is inversely proportional to the wet density. After the target value is set, the original silt is added to the weighing feeder through an excavator at the construction site, and the original silt enters the mugging machine 1 from the feeding port of the mugging machine 1, and the mugging machine 1 is also provided with a wet density measuring instrument 102 for monitoring the wet density of the original silt. In order to facilitate the control of the wet density of the original silt, it is necessary to set the weight of the original silt put into the mugging machine 1 each time by the weighing feeder. When the weighing feeder When the weight of the original sludge inputted into the mud dispersing machine 1 by the feeder reaches the set value, the staff suspends the conveying work of the weighing feeder, and judges whether it is necessary to add water to the mud dispersing machine 1 according to the data measured by the wet density measuring instrument 102 and the wet density target value of the original sludge. If water is needed, the staff calculates the amount of water added according to the relationship between the amount of water added and the wet density of the original sludge obtained in the test, and adds the calculated amount of water from the feed inlet of the mud dispersing machine 1. The original sludge is mixed with water to form adjusted sludge, and then the wet density of the adjusted sludge is measured by the wet density measuring instrument 102, and compared with the wet density target value of the original sludge again. If the wet density of the original sludge is less than the target value, continue to add water until the wet density of the adjusted sludge reaches the preset target value, stop adding water, and transfer The wet density of the sludge is adjusted to be compared with the target wet density of the solidified soil, and the weight of the solidified material to be added is calculated. While the sludge is adjusted to pass through the discharge port of the mud dispersing machine 1 and is transported to the forced mixer 3 via the first screw conveyor 101, the staff adds the calculated amount of solidified material to the feed port of the weighing hopper 201, and the staff can judge whether the amount of solidified material added reaches the calculated weight based on the first weighing sensor 203 at the bottom of the weighing hopper 201. The first weighing sensor 203 is arranged between the weighing hopper 201 and the second screw conveyor 202. The staff first knows the weight of the weighing hopper 201 without solidified material through the first weighing sensor 203, and then adds solidified material to the weighing hopper 201.If the weight displayed by the first weighing sensor 203 is the sum of the weight of the weighing hopper 201 without solidifying material and the calculated amount of solidifying material added, stop adding solidifying material, and the solidifying material in the weighing hopper 201 can be transported to the forced mixer through the second screw conveyor 202 to mix with the adjusted sludge to obtain adjusted solidified soil. The staff samples the adjusted solidified soil to measure its wet density and compares it with the wet density target value of the solidified soil. If the wet density of the adjusted solidified soil is less than the wet density target value of the solidified soil, the solidifying material can be continued to be added to the forced mixer 3 through the second screw conveyor 202 until the wet density value of the adjusted solidified soil reaches the preset target value, and then it is input into the tailings filling pump 4 through the discharge port 301 of the forced mixer, and then transported to the backfilling field through the conveying pipeline 401 for pouring and backfilling. By controlling and adjusting the wet density of the original sludge, a uniform and stable adjusted sludge is obtained, which minimizes the impact of the original sludge properties due to property fluctuations and ensures the quality and flow value of the solidified soil poured and backfilled.

[0083] Among them, the test method for the relationship between the amount of water added and the wet density of the original sludge is:

[0084] Step 1: Measure the wet density ρ1 of the original sludge;

[0085] Step 2: setting the weight m of the original sludge fed into the desludging machine 1 each time by the weighing feeder and the target value ρ2 of the wet density of the original sludge;

[0086] Step 3: Calculate the soil volume m1, soil volume ν1, water volume m2 and water volume ν2 of the original silt according to the formula;

[0087] m1+m2=m

[0088]

[0089]

[0090]

[0091] Step 4: according to the target strength of the solidified soil, the amount of solidified material added m3 is set, and the volume solid ν3 of the solidified material can be known from the amount of solidified material added;

[0092] Compare ρ1 and ρ2. If ρ1>ρ2, calculate the mass m4 and volume v4 of water to be added according to the formula.

[0093]

[0094]

[0095] In another technical solution, a water adding system is also included, which includes:

[0096] Water storage tank 6;

[0097] A first water pipe 601, whose water inlet is connected to the water storage tank 6, and whose water outlet is connected to the feed inlet of the mud disintegrator 1;

[0098] The second water pipe 602 has a water inlet connected to the water storage tank 6 , and a water outlet connected to the feed inlet of the second screw conveyor 202 .

[0099] In the present technical solution, the water storage tank 6 is connected to the feed port of the mud dispersing machine 1 and the second screw conveyor 202 through the first water pipe 601 and the second water pipe 602 respectively. When the wet density of the original sludge in the mud dispersing machine 1 exceeds the preset target value, water needs to be added to the mud dispersing machine 1. After the staff calculates the amount of water to be added, they can open the valve between the water storage tank 6 and the first water pipe 601 to add the calculated amount of water to the mud dispersing machine 1, so that the wet density of the adjusted sludge in the mud dispersing machine 1 reaches the preset target value. When the wet density of the original sludge measured by the wet density measuring instrument 102 in the mud dispersing machine 1 is measured, it can also be judged by the wet density whether the original sludge is more clay or more sand, and thus determine The basic properties of the original sludge. If the clay content in the original sludge is high, in order to enhance the contact and mixing uniformity between the original sludge and the solidified material, the original sludge without water can be directly transported to the forced mixer, and the calculated amount of solidified material is added to the weighing hopper 201 and then transported through the second screw conveyor 202. At the same time, the valve between the water storage tank 6 and the second water pipe 602 is opened to add water to the second screw conveyor 202 to obtain the adjusted material. The adjusted material, that is, the solidified material, is in a slurry state after mixing with water, and then it is transported to the forced mixer 3 to mix with the original sludge, and finally poured and backfilled. The water adding system can replace manual water adding to improve work efficiency.

[0100] In another technical solution, the weighing feeder comprises:

[0101] frame;

[0102] A mud storage hopper 7, which is fixedly arranged on the frame and is used to store the original mud;

[0103] A third screw conveyor 701 is fixedly arranged on the frame and is located directly below the mud storage hopper 7, the feed port of the third screw conveyor 701 is communicated with the discharge port of the mud storage hopper 7, and the discharge port of the third screw conveyor 701 is communicated with the feed port of the mud dissolving machine 1;

[0104] The second weighing sensor 702 is arranged at the bottom of the frame and is used to weigh the frame, the third screw conveyor 701 and the mud storage bucket 7.

[0105] In the present technical solution, the frame is used to fix the mud storage bucket 7 and the third screw conveyor 701, and the feed port of the third screw conveyor 701 is connected with the discharge port of the mud storage bucket 7, and the discharge port is connected with the feed port of the mud dissolving machine 1. When the excavator puts the original mud into the mud storage bucket 7, the mud storage bucket 7 can convey the original mud to the mud dissolving machine 1 through the third screw conveyor 701, and dynamically weigh the original mud, the mud storage bucket 7, the third screw conveyor 701 and the third bracket through the second weighing sensor 702. Before the original mud is put into the mud storage bucket 7, the weight of the weighing feeder containing the original mud to be transported can be calculated, and then the original mud is conveyed through the third screw conveyor 701. While delivering the sludge to the desludging machine 1, observe the value displayed on the second weighing sensor 702, and use the difference method to determine whether the weight of the original sludge transported in the third screw conveyor 701 is consistent with the set weight. If they are consistent, stop the conveying function of the third screw conveyor 701 to achieve the purpose of delivering the original sludge to the desludging machine 1 in a quantitative manner each time, so as to achieve precise batching. An alarm 703 can also be set on the frame, and the weight of the original sludge transported is set in the alarm 703. When the weight weighed by the second weighing sensor 702 meets the set weight, an automatic alarm prompt is issued to prevent the operator from continuing to put the original sludge into the mud storage bucket 7, thereby further improving the accuracy of precise batching.

[0106] In another technical solution, a stirring device 8 is further included, which is fixed inside the demudder 1 and is used to stir the original sludge input into the demudder 1 .

[0107] In the present technical solution, the stirring device 8 is used to stir the original sludge and water after the water adding system has finished adding water, so as to fully mix them, thereby improving the accuracy of the wet density of the adjusted sludge measured by the wet density measuring instrument 102.

[0108] In another technical solution, the stirring device 8 includes two first rotating rods 801, which are relatively arranged at the two ends of the mud dispersing machine 1, one end of any first rotating rod 801 passes through one side of the mud dispersing machine 1 and is rotatably connected to one side of the bracket, and the other end is rotatably connected to the other side of the bracket through a first driving device 803; a plurality of first rake rods 802 are fixedly provided on the outer wall of any first rotating rod 801, and are circumferentially spaced along the length direction of the first rotating rod 801.

[0109] In the present technical solution, a stirring device 8 is arranged inside the mud dispersing machine 1, and is used to stir the original sludge and water after each water addition is completed. Due to long-term sedimentation, the original sludge particles agglomerate with each other. If the original sludge is not crushed and stirred, the time for mixing the original sludge and water will be prolonged, and when no water is needed, the mixing effect of the original sludge and the solidified material will be seriously affected. The driving device is preferably a motor. By starting the driving device, the two first rotating rods 801 can be driven to rotate relative to each other to crush the original sludge, and the rake rod on the first rotating rod 801 is arranged around the circumference of the first rotating rod 801, which can further improve the crushing effect of the original sludge, maximize the dissociation of particle agglomerates in the original sludge, and improve the uniformity and fluidity of the original sludge.

[0110] In another technical solution, the curing material adding device further comprises:

[0111] A powder silo 2, which is fixedly arranged and used to store solidified materials;

[0112] The fourth screw conveyor 204 has a feed port connected to the discharge port of the powder bin 2 , and the discharge port of the fourth screw conveyor 204 is connected to the feed port of the weighing hopper 201 .

[0113] In the present technical scheme, the powder silo is fixedly arranged for storing solidifying materials, the discharge port of the powder silo 2 is connected with the feed port of the fourth screw conveyor 204, and the discharge port of the fourth screw conveyor 204 is connected with the feed port of the weighing hopper 201. After the weight of the solidifying material to be added is calculated, the powder silo 2 is started, and the solidifying material in the powder silo 2 is conveyed to the weighing hopper 201 through the fourth screw, and the first weighing sensor 203 weighs the weight of the weighing hopper 201 in real time. If the weighed weight is equal to the sum of the calculated addition amount of the solidifying material and the weight of the weighing hopper 201 without the solidifying material, the operator suspends the fourth screw conveyor 204 from conveying the solidifying material, thereby achieving the purpose of accurate batching of the solidifying material and saving construction costs.

[0114] In another technical solution, a grille 704 is further included, which is fixedly arranged on the top of the mud storage hopper 7, and the aperture of the grille 704 is less than 10 cm.

[0115] In this technical solution, the original sludge is fed into the mud storage hopper 7 by an excavator. When the excavator digs the original sludge, a large amount of construction waste and gravel will be contained in the original sludge. The grid 704 can make the original sludge undergo initial screening before entering the mud storage hopper 7 to remove relatively large construction waste and gravel, thereby preventing large impurities from clogging the tailings filling pump 4 and causing machine damage.

[0116] In another technical solution, a stirrer 705 is further included, which is arranged inside the mud storage hopper 7, and the stirrer 705 includes:

[0117] A second rotating rod, one end of which passes through one side of the mud storage bucket 7 and is rotatably connected to one side of the frame, and the other end of which is rotatably connected to the other side of the frame through a second driving device;

[0118] A plurality of second rake rods are fixedly arranged on the outer side wall of the second rotating rod and are circumferentially spaced along the length direction of the second rotating rod.

[0119] In the present technical solution, a second rotating rod and a second rake rod are arranged in the mud storage hopper 7, so that the original mud is initially stirred in the mud storage hopper 7 and then enters the mud dispersing machine 1 for secondary stirring, thereby further improving the crushing effect of the original mud.

[0120] In another technical solution, a calculation controller 5 is also included, which includes:

[0121] A storage unit, which is used to store the wet density target value of the original sludge, the wet density target value of the solidified soil, the weight of the original sludge delivered by the weighing feeder each time, the liquid limit value of the original sludge, and the relationship between the amount of water added to the original sludge and the wet density;

[0122] A calculation unit, which obtains the data measured by the wet density measuring instrument 102 and compares the data with the wet density target value of the original sludge, calculates the amount of water added according to the relationship between the amount of water added and the wet density of the original sludge, and compares the wet density of the original sludge with the wet density target value of the solidified soil to calculate the amount of solidified material added;

[0123] A control unit, which obtains the weighing data of the second weighing sensor 702 and controls the output weight of the original sludge by the weighing feeder, and the control unit also obtains the weighing data of the first weighing sensor 203 and controls the output weight of the solidifying material by the solidifying material adding device and controls the water adding system;

[0124] Wherein, the storage unit, the calculation unit and the control unit transmit information to each other.

[0125] In the present technical solution, for different properties of the original silt, the wet density target value of the original silt, the wet density target value of the solidified soil, the weight of the original silt delivered by the weighing feeder each time, and the liquid limit value of the original silt and the relationship between the amount of water added to the original silt and the wet density are stored in the storage unit of the operation controller 5, and then the original silt is unloaded into the weighing feeder by the excavator, and the control unit controls the weight of the original silt input into the mud dispersing machine 1 by the weighing feeder, so as to achieve the purpose of quantitatively delivering the original silt by the weighing feeder each time, and the wet density measuring instrument 102 in the mud dispersing machine 1 measures the wet density of the original silt in real time and feeds it back to the calculation unit of the operation controller 5 and compares it with the wet density target value of the original silt. By comparison, if the fed-back wet density is less than the wet density target value, the calculation unit calculates the amount of water to be added according to the relationship between the wet density and the amount of water added, and feeds the amount of water added back to the control unit, the control unit controls the water adding system to add the calculated amount of water to the mud disintegrator 1, after the water addition is completed, the stirring device 8 stirs the original sludge and water to obtain the adjusted sludge, the wet density measuring instrument 102 measures the wet density of the adjusted sludge again, and compares it with the wet density target value of the original sludge again, if the wet density of the original sludge is still less than the wet density target value, the control unit continues to control the water adding system to add water until the wet density of the adjusted sludge measured by the wet density measuring instrument 102 reaches the preset target value, and stops adding water, the calculation unit compares the wet density of the adjusted sludge with the wet density of the adjusted sludge. The wet density target value of the solidified soil is compared with the wet density target value of the solidified soil, and the weight of the solidified material to be added is calculated. The sludge is adjusted and transported to the forced mixer 3 through the first screw conveyor 101 at the bottom of the mud dispersing machine 1. At the same time, the staff starts the powder bin 2 to add the calculated amount of solidified material to the weighing hopper 201, and the calculation unit calculates in real time the difference between the weight displayed by the first weighing sensor 203 and the weight of the weighing hopper 201 without solidified material and the calculated amount of solidified material added to determine whether the amount of solidified material added reaches the calculated weight. If the difference is zero, the addition of solidified material is stopped, and the solidified material is transported to the forced mixer through the second screw conveyor 202 to mix with the adjusted sludge to obtain adjusted solidified soil. The staff takes samples of the adjusted solidified soil to measure its wet density and compares it with the wet density target value of the adjusted solidified soil. If the wet density of the adjusted solidified soil is less than the wet density target value of the solidified soil, the solidified material is continued to be added to the forced mixer 3 through the second screw conveyor 202 until the wet density value of the adjusted solidified soil reaches the preset target value, and then it is input into the tailings filling pump 4 through the forced mixer, and is transported to the backfilling field through the conveying pipeline 401 for pouring and backfilling. The wet density of the original sludge is controlled and adjusted by the operation controller 5, and the adjusted sludge with uniform and stable quality is obtained, which minimizes the influence of the original sludge properties caused by the fluctuation of the properties and ensures the quality and flow value of the solidified soil poured and backfilled. The present invention also provides a preparation process for pumpable poured backfill solidified soil, which is as follows:

[0126] Step 1: The above-mentioned preparation system is assembled on the ground, and the target wet density value of the original sludge, the target wet density value of the solidified soil A1, the weight of the original sludge delivered by the weighing feeder each time, the liquid limit value of the original sludge, and the relationship between the amount of water added to the original sludge and the wet density are preset in the storage unit of the operation controller 5;

[0127] Step 2: The control unit of the operation controller 5 controls the weighing feeder to deliver the original sludge to the desludge machine 1 in a quantitative manner each time, and at the same time, the wet density measurement at the bottom of the desludge machine 1 measures the wet density of the original sludge input to the desludge machine 1, and feeds the measured data back to the calculation unit of the operation controller 5;

[0128] Step 3: The calculation unit of the operation controller 5 compares the data fed back by the wet density measuring instrument 102 with the preset wet density target value of the original sludge. When the fed back data exceeds the preset target value, water needs to be added to the mud dispersing machine 1, otherwise no water is added. When water needs to be added, the calculation unit calculates the amount of water added according to the relationship between the amount of water added and the wet density of the original sludge, and transmits it to the control unit. The control unit controls the water adding system to add the calculated amount of water to the mud dispersing machine 1 to adjust the wet density of the original sludge. The stirring device 8 stirs the original sludge and water to obtain the adjusted sludge. When the wet density of the adjusted sludge reaches the preset target value in the operation controller 5, the water addition is stopped;

[0129] Step 4: After the water is added, the calculation unit of the operation controller 5 compares the wet density of the adjusted sludge with the wet density target value of the solidified soil. If the wet density of the adjusted sludge is less than the wet density target value of the solidified soil, the calculation unit of the operation controller 5 calculates and analyzes the amount of solidifying material added, thereby controlling the wet density and strength of the solidified soil to remain within a reasonable range, so that the quality of the solidified soil remains stable.

[0130] Step 5: The adjusted sludge in the mud dispersing machine 1 is conveyed to the forced mixer 3 through the first screw conveyor 101. At the same time, the solidified material in the powder bin 2 is added to the weighing hopper 201 through the fourth screw conveyor 204. The first weighing sensor 203 at the bottom of the weighing hopper 201 dynamically weighs the weight of the added solidified material, and transmits the weighing result to the control unit of the operation controller 5 in real time. When the weight weighed by the first weighing sensor 203 is consistent with the added amount of the solidified material calculated and analyzed in the calculation unit of the operation controller 5, the fourth screw conveyor 204 stops adding the solidified material to the weighing hopper 201, and the solidified material in the weighing hopper 201 is conveyed to the forced mixer 3 through the second screw conveyor 202;

[0131] Step 6: Start the forced mixer 3, and maintain the preset stirring time to uniformly mix the adjusted sludge and the solidifying material to obtain the adjusted solidified soil, and then compare the wet density of the adjusted solidified soil with the wet density target value of the solidified soil. If the wet density of the adjusted solidified soil is still less than the wet density target value of the solidified soil, continue to add the solidifying material to the forced mixer 3 until the wet density value of the adjusted solidified soil reaches the preset target value;

[0132] Step 7: The adjusted solidified soil whose wet density reaches the preset target value is discharged from the discharge port 301 at the bottom of the forced mixer 3 into the tailings filling pump 4, and transported to the backfilling site through the conveying pipeline 401 for pouring and backfilling.

[0133] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A system for preparing pumpable backfill solidified soil, characterized in that: It includes an original sludge conveying device and a solidified material adding device for adding original sludge and solidified material to the interior of the forced mixer, and a backfilling device connected to the backfilling field, wherein: The original sludge conveying device includes: A weigh feeder, which is fixedly arranged and used to control the weight of the original sludge output; A mud dispersing machine is fixedly arranged by a bracket, and a feed port of the mud dispersing machine is connected to the weighing feeder; A first screw conveyor, whose feed port is connected to the discharge port of the demudifier; A wet density measuring instrument, which is arranged inside the desludging machine and is used to monitor the wet density of the original sludge; The weigh feeder comprises: frame; A mud storage hopper is fixedly arranged on the frame and is used to store the original mud; A third screw conveyor is fixedly arranged on the frame and is located directly below the mud storage hopper, wherein the feed port of the third screw conveyor is communicated with the discharge port of the mud storage hopper, and the discharge port of the third screw conveyor is communicated with the feed port of the mud dissolving machine; A second weighing sensor is arranged at the bottom of the frame to obtain the weight of the frame, the third screw conveyor and the mud storage bucket; The curing material adding device includes: A second screw conveyor, which is fixedly arranged; A weighing hopper, which is fixedly arranged just above the second screw conveyor and is connected to a feed port of the second screw conveyor; A first weighing sensor is disposed between the weighing hopper and the second screw conveyor to obtain the weight of the weighing hopper; A powder silo, which is fixedly arranged and used to store solidified materials; A fourth screw conveyor, whose feed port is connected to the discharge port of the powder bin, and the discharge port of the fourth screw conveyor is connected to the feed port of the weighing hopper; The forced mixer includes: A mixing barrel, which is arranged on the ground, wherein the discharge ports of the first screw conveyor and the second screw conveyor are both connected to the feed port of the mixing barrel, and a discharge port is arranged at the bottom of the mixing barrel; A stirring shaft, which is fixedly arranged inside the stirring barrel; The backfill device includes: A tailings filling pump is arranged on the ground, and a feed port of the tailings filling pump is connected with a discharge port at the bottom of the mixing barrel; A conveying pipeline, one end of which is connected to the discharge port of the tailings filling pump, and the other end of which is connected to the backfilling field; Also included is a water addition system, which includes: Water storage tanks; a first water pipe, whose water inlet is connected to the water storage tank and whose water outlet is connected to the feed inlet of the demudifier; a second water pipe, whose water inlet is connected to the water storage tank and whose water outlet is connected to the feed inlet of the second screw conveyor; Also included is an operation controller, which includes: A storage unit, which is used to store the wet density target value of the original sludge, the wet density target value of the solidified soil, the weight of the original sludge delivered by the weighing feeder each time, the liquid limit value of the original sludge, and the relationship between the amount of water added to the original sludge and the wet density; A calculation unit, which obtains data measured by a wet density measuring instrument and compares the data with a target value of wet density of the original sludge, calculates the amount of water added according to the relationship between the amount of water added and the wet density of the original sludge, and compares the wet density of the original sludge with the target value of wet density of the solidified soil to calculate the amount of solidified material added; A control unit, which obtains the weighing data of the second weighing sensor and controls the output weight of the original sludge by the weighing feeder, and the control unit also obtains the weighing data of the first weighing sensor and controls the output weight of the solidifying material by the solidifying material adding device and controls the water adding system; Wherein, the storage unit, the calculation unit and the control unit transmit information to each other; The preparation process of pumpable pouring backfill solidified soil comprises the following steps: Step 1: The above-mentioned preparation system is assembled on the ground, and the wet density target value of the original sludge, the wet density target value of the solidified soil, the weight of the original sludge delivered by the weighing feeder each time, the liquid limit value of the original sludge obtained by the test, and the relationship between the water addition amount and the wet density of the original sludge are preset in the storage unit of the operation controller; Step 2: The control unit of the operation controller controls the weighing feeder to convey the original sludge to the desludge machine in a quantitative manner each time. At the same time, the wet density measurement at the bottom of the desludge machine measures the wet density of the original sludge input to the desludge machine, and feeds the measured data back to the calculation unit of the operation controller; Step 3: The calculation unit of the operation controller compares the data fed back by the wet density measuring instrument with the preset wet density target value of the original sludge. When the fed back data exceeds the preset target value, water needs to be added to the mud dispersing machine, otherwise no water is added. When water needs to be added, the calculation unit calculates the amount of water added according to the relationship between the amount of water added and the wet density of the original sludge, and transmits it to the control unit. The control unit controls the water adding system to add the calculated amount of water to the mud dispersing machine according to the calculated amount of water added, and adjusts the wet density of the original sludge. At the same time, the stirring device stirs the original sludge and water to obtain adjusted sludge. When the wet density of the adjusted sludge reaches the preset target value in the storage unit of the operation controller, the water addition is stopped; Step 4: After the water is added, the calculation unit of the operation controller compares the wet density of the adjusted sludge with the wet density target value of the solidified soil. If the wet density of the adjusted sludge is less than the wet density target value of the solidified soil, the calculation unit of the operation controller calculates and analyzes the amount of solidified material added; Step 5: The adjusted sludge in the mud dispersing machine is conveyed to the forced mixer through the first screw conveyor. At the same time, the solidified material in the powder bin is added to the weighing hopper through the fourth screw conveyor. The first weighing sensor at the bottom of the weighing hopper dynamically weighs the weight of the added solidified material, and transmits the weighing result to the control unit of the operation controller in real time. When the weight weighed by the first weighing sensor is consistent with the added amount of the solidified material calculated and analyzed in the calculation unit, the fourth screw conveyor stops adding the solidified material to the weighing hopper, and the solidified material in the weighing hopper is conveyed to the forced mixer through the second screw conveyor. Step 6: Start the forced mixer and maintain the preset stirring time to evenly mix the adjusted sludge and the solidifying material to obtain the adjusted solidified soil, and then compare the wet density of the adjusted solidified soil with the wet density target value of the solidified soil. If the wet density of the adjusted solidified soil is still less than the wet density target value of the solidified soil, continue to add the solidifying material to the forced mixer until the wet density of the adjusted solidified soil reaches the preset target value; Step 7: The adjusted solidified soil whose wet density reaches the preset target value is discharged from the discharge port at the bottom of the forced mixer into the tailings filling pump, and transported to the backfill site through the conveying pipeline for pouring and backfilling.

2. The system for preparing pumpable pouring backfill solidified soil according to claim 1, characterized in that: The utility model also comprises a stirring device, which is fixedly arranged inside the mud dispersing machine and is used for stirring the original sludge input into the mud dispersing machine.

3. The system for preparing pumpable pouring backfill solidified soil according to claim 2, characterized in that: The stirring device includes two first rotating rods, which are arranged at two ends of the mud dispersing machine opposite to each other. One end of any first rotating rod passes through one side of the mud dispersing machine and is rotatably connected to one side of the bracket, and the other end is rotatably connected to the other side of the bracket through a first driving device; a plurality of first rake rods are fixedly provided on the outer side wall of any first rotating rod, and are circumferentially spaced along the length direction of the first rotating rod.

4. The system for preparing pumpable pouring backfill solidified soil according to claim 1, characterized in that: It also includes a grille, which is fixedly arranged on the top of the mud storage bucket, and the aperture of the grille is less than 10 cm.

5. The system for preparing pumpable pouring backfill solidified soil according to claim 1, characterized in that: It also includes an agitator, which is arranged inside the mud storage bucket, and the agitator includes: A second rotating rod, one end of which passes through one side of the mud storage bucket and is rotatably connected to one side of the frame, and the other end of which is rotatably connected to the other side of the frame through a second driving device; A plurality of second rake rods are fixedly arranged on the outer side wall of the second rotating rod and are circumferentially spaced along the length direction of the second rotating rod.

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