Sludge in-situ solidification treatment method in river regulation construction

Abstract

The invention discloses a sludge in-situ curing treatment method in river regulation construction, which is characterized in that a sludge in-situ curing treatment device for river regulation construction is used for carrying out in-situ curing treatment on sludge, and the sludge in-situ curing treatment device for river regulation construction is provided with a main shaft connected with a motor and a stirring device mounted on the main shaft, a pesticide spraying assembly is arranged at the bottom of a protection sleeve of the main shaft. The method comprises the steps that a pesticide injection space penetrating into sludge is formed through an arrow-shaped structure moving along with the pesticide spraying assembly; and the pesticide spraying assembly is used for spraying a curing pesticide to the pesticide injection space. According to the sludge in-situ solidification treatment method in the river regulation construction, the agent injection space formed by the arrow-shaped structure attached to the stirring device moves along with the movement of the main shaft to inject the solidification agent, so that the solidification agent reaches the sludge and extends out, and a more efficient agent mixing effect is brought to the sludge in-situ treatment; the method is used for improving the quality of sludge in-situ solidification treatment in river regulation construction.

Description

Technical Field

[0001] The present invention relates to the technical field of river regulation, and in particular to a method for in-situ solidification treatment of sludge in river regulation construction. Background Art

[0002] In current river regulation projects, in-situ solidification treatment of sludge is a key link. With the acceleration of industrialization and urbanization, the problem of river pollution has become increasingly severe. A large amount of sludge containing pollutants such as heavy metals and organic substances accumulates at the bottom of the river, which not only affects the flood discharge capacity of the river but also causes continuous damage to the water ecological environment.

[0003] Traditional methods for treating river sludge often require large-scale excavation, transportation, and off-site treatment of the sludge. This method is costly, prone to secondary pollution during transportation, and occupies a large amount of land resources. Therefore, in-situ solidification treatment technology has emerged. Its aim is to convert sludge into a stable solid form by adding solidifying agents without moving the sludge, reduce the leaching of harmful substances, and improve the strength and stability of the sludge for subsequent further disposal or utilization.

[0004] The sludge in-situ solidification treatment device disclosed in the patent with the publication number CN219259803U can solve the problem of off-site treatment after large-scale excavation and transportation. However, the existing sludge in-situ solidification treatment devices for river regulation construction have exposed a significant problem in practical applications: when stirring the sludge to mix the solidifying agent, the solidifying agent is difficult to quickly penetrate into the interior of the sludge. Sludge usually has complex components and structures, including particles of different particle sizes, a large amount of moisture, and intertwined fibrous substances. Its internal pore structure is fine and irregular. When a conventional stirring device operates, relying only on the simple rotation and turning of the paddle blades, most of the solidifying agent stays on the surface of the sludge and cannot quickly and evenly penetrate deep into the sludge. This results in the need to spend a large amount of time to extend the stirring process in the hope that the agent slowly diffuses inward, which not only greatly reduces the construction efficiency, increases the equipment energy consumption and labor costs, and prolongs the construction period of river regulation, but also due to uneven penetration of the agent, the solidification effect is uneven. Some areas of the treated sludge meet the strength standards, while some areas are still loose and easy to lose, unable to meet the requirements of the project for the overall stability of the solidified sludge, and it is difficult to achieve an ideal river regulation effect, and there are still potential environmental pollution hazards in the future.

[0005] In summary, it is urgent to develop a method for in-situ solidification treatment of sludge in river regulation construction that can effectively solve the problem of rapid penetration of the solidifying agent into the interior of the sludge during sludge stirring. Summary of the Invention

[0006] The object of the present invention is to provide a method for in-situ solidification treatment of sludge in river regulation construction, which can improve the penetration effect of the agent on the sludge, enable the agent to be directly sprayed to a deeper position, reduce the possibility of a large amount of the agent being absorbed on the surface layer of the sludge, and improve the construction quality of the in-situ solidification treatment of the sludge.

[0007] The present invention provides a method for in-situ solidification treatment of sludge in river regulation construction. This method uses a device for in-situ solidification treatment of sludge in river regulation construction to perform in-situ solidification treatment on the sludge. The device for in-situ solidification treatment of sludge in river regulation construction has a main shaft connected to a motor and a stirring device installed on the main shaft. A chemical spraying assembly is provided at the bottom of the protective sleeve of the main shaft. This method includes:

[0008] Forming a chemical injection space that penetrates into the sludge by using an arrow-shaped structure that moves along with the chemical spraying assembly;

[0009] Spraying a solidifying agent into the chemical injection space by using the chemical spraying assembly;

[0010] The chemical injection space is located behind the stirring blades and is formed by spreading the mud dividing plate and the mud supporting plate of the arrow-shaped structure. When the stirring blades rotate, the chemical injection space continuously penetrates into the interior of the sludge along with the movement of the stirring blades, enabling the agent to be directly sprayed to a deeper position, reducing the possibility of being largely absorbed on the surface layer. The mud dividing plate divides the sludge, and the mud supporting plate spreads to form a space. After the agent is sprayed, as the stirring blades continue to rotate, the surrounding sludge will backfill into the chemical injection space and mix with the agent.

[0011] In the method for in-situ solidification treatment of sludge in river regulation construction provided by the present invention, the method further includes using the rotating bottom plate kit of the chemical spraying assembly to perform periodic swinging chemical spraying on the sludge. This periodic swinging chemical spraying achieves the effect of walking a certain distance along with the chemical injection space to spray the liquid medicine into the sludge and then resetting to spray the liquid medicine on the sludge, further increasing the mixing effect of the agent and the sludge.

[0012] In the method for in-situ solidification treatment of sludge in river regulation construction provided by the present invention, mud dividing plates are symmetrically arranged on adjacent stirring blades of the stirring device. The mud dividing plates are provided with mud supporting plates distributed oppositely, and an arrow-shaped structure is formed by the mud dividing plates and the mud supporting plates. The arrow-shaped structure forms a chemical injection space. The mud dividing plates and the mud supporting plates are distributed in a straight line along the height direction of the main shaft. The chemical spraying assembly is provided with a liquid medicine nozzle that cooperates with the chemical injection space.

[0013] Compared with the prior art, the method for in-situ solidification treatment of sludge in river regulation construction provided by the present invention uses the chemical injection space formed by the arrow-shaped structure attached to the stirring device to move along with the main shaft to inject the solidifying agent, so that the solidifying agent can reach the extended part of the sludge (the depth of the arrow extension is the depth that the solidifying agent can reach), bringing a more efficient chemical mixing effect to the in-situ treatment of the sludge, and improving the quality of the in-situ solidification treatment of the sludge in river regulation construction.

[0014] In the in-situ solidification treatment method for sludge in river regulation construction provided by the present invention, the mud dividing plate is V-shaped. This structure with a pointed head can not only improve the efficiency of sludge cutting, but more importantly, it can minimize the resistance, thereby reducing the load and energy consumption of the spindle motor. The fixing form of the mud dividing plate includes but is not limited to welding on the stirring blade, and the mud dividing plate needs to extend out from the edge of the stirring blade, and the extended length is set according to needs. The mud dividing plate has an external extension portion at the edge of the stirring blade to minimize the obstruction of the stirring blade to the vertical injection space.

[0015] In the in-situ solidification treatment method for sludge in river regulation construction provided by the present invention, the mud support plate is tangent to the rotation direction of the stirring blade, so as to better achieve smooth movement in the rotation direction while reducing the corresponding resistance.

[0016] In the in-situ solidification treatment method for sludge in river channel regulation construction provided by the present invention, the medicine spraying component has a medicine spraying shell, which is a bottom opening structure composed of a circular top and an annular enclosure distributed around the edge of the circular top. A plurality of groups of medicine inlet pipes are distributed in an annular array on the circular top of the medicine spraying shell. A rotating bottom plate that can rotate horizontally in the medicine spraying shell is movably installed at the opening of the medicine spraying shell. A plurality of groups of medicine water nozzles that cooperate with the medicine inlet pipes are distributed in an annular array of the rotating bottom plate. Each group of medicine water nozzles is connected to the medicine inlet pipe by a flexible telescopic connecting pipe. The medicine water nozzle is located directly above the medicine injection space, and the rotating bottom plate can rotate with the rotation of the main shaft.

[0017] In the in-situ solidification treatment method for sludge in river channel regulation construction provided by the present invention, a plurality of groups of slide grooves are arranged in pair on the lower surface of the circular top of the spraying shell and the upper surface of the rotating bottom plate, and the slide grooves are inclinedly distributed. A sliding rod that can slide along the slide grooves is movably installed between the two corresponding groups of slide grooves, and a return spring is arranged between the end of the sliding rod and the end of the sliding groove. A sliding rod toggle plate that cooperates with the sliding rod is radially installed on the side wall of the main shaft corresponding to the position of the sliding rod, and the distance between the far end of the slide groove and the center of the main shaft is the same as the sum of the length of the sliding rod toggle plate and the diameter of the sliding rod.

[0018] In the in-situ solidification treatment method for sludge in river regulation construction provided by the present invention, the cross-section of the slide chute is a structure that is narrow at the top and wide at the bottom, and anti-slip plates that fit with the slide chute are respectively provided at both ends of the slide rod.

[0019] In the in-situ solidification treatment method for sludge in river channel regulation construction provided by the present invention, one end of the slide trough for installing the reset spring is flat, and the slide rod is integrally formed with a stabilizing block at the same horizontal height as the reset spring, and the end of the stabilizing block close to the reset spring is flat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a three-dimensional diagram of a sludge in-situ solidification treatment device used in river channel regulation construction in the sludge in-situ solidification treatment method in river channel regulation construction.

[0021] Figure 2 This is a top view of a stirring device of a sludge in-situ solidification treatment device for river channel regulation construction in a sludge in-situ solidification treatment method during river channel regulation construction.

[0022] Figure 3 This is a three-dimensional diagram of the spraying component of the sludge in-situ solidification treatment device used in river channel regulation construction in the sludge in-situ solidification treatment method during river channel regulation construction.

[0023] Figure 4 This is a top view of the spraying component of the sludge in-situ solidification treatment device used in river channel regulation construction in the sludge in-situ solidification treatment method during river channel regulation construction. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0025] An embodiment of the present invention provides an in-situ solidification treatment method for sludge in river channel regulation construction (hereinafter referred to as "the method"). The method uses an in-situ solidification treatment device for sludge in river channel regulation construction to perform in-situ solidification treatment on the sludge. The in-situ solidification treatment device for sludge in river channel regulation construction has a main shaft connected to a motor and a stirring device installed on the main shaft. A spraying assembly is provided at the bottom of the protective sleeve of the main shaft. The method includes using an arrow-shaped structure that follows the movement of the spraying assembly to form a drug injection space that penetrates into the sludge and using the spraying assembly to spray a solidifying agent into the drug injection space. At the same time, the method can also use a rotating bottom plate kit of the spraying assembly to periodically swing the sludge. This periodic swinging spraying achieves the effect of following the injection space to travel a certain distance to spray the drug solution into the sludge, and then resetting to spray the drug solution on the sludge, further increasing the mixing effect of the agent and the sludge.

[0026] Before describing the method in detail, an in-situ solidification treatment device for sludge used in river regulation construction is introduced. The in-situ solidification treatment device for sludge used in river regulation construction (hereinafter referred to as "the device") is described in detail. Figures 1-3 As shown, the device includes a main shaft 1, a stirring blade 2, a mud dividing plate 3, a mud supporting plate 4, a medicine injection space 5, a protective cover 6, a medicine spraying shell 7, a medicine inlet pipe 8, a rotating bottom plate 9, a medicine spray head 10, a flexible telescopic connecting pipe 11, a slide 12, a slide rod 13, a reset spring 14, a toggle plate 15, an anti-slip plate 16, and a stabilizing block 17, wherein the stirring blade 2 is a component of the stirring device 18.

[0027] See also Figure 1, the main shaft 1 of the device is connected to a driving motor (not shown in the figure). Driven by the driving motor, the main shaft rotates. At the lower part of the main shaft 1, multiple sets of stirring devices 18 for stirring sludge are installed. Each set of stirring devices has 6 stirring blades 2. In this embodiment, 2 sets of stirring devices 18 are arranged in the height direction of the main shaft, and the quantity can be adjusted according to needs. After the stirring blades 2 are inserted into the sludge, the external motor drives the main shaft 1 to rotate, and the sludge is stirred by the stirring blades 2 to better mix the sludge with the solidifying agent. It is worth mentioning that a sludge dividing plate 3 and a sludge supporting plate 4 are installed on the stirring blade. The arrow-shaped structure formed by the sludge dividing plate 3 and the sludge supporting plate 4 can enable the solidifying agent to reach the inside of the sludge reasonably, changing the problem that most traditional drug deliveries can only be on the surface of the sludge. The sludge dividing plates 3 are symmetrically arranged between adjacent stirring blades. The sludge dividing plates 3 and the sludge supporting plates 4 are distributed in a straight line along the height direction of the main shaft. The linearly distributed structure is conducive to the drug reaching the deep part of the sludge with the shortest travel. The sludge dividing plates can be welded and fixed on the stirring blades. To cut open the sludge and reduce the load of the motor, the sludge dividing plate 3 adopts a V-shaped structure. The V-shaped tip of the V-shaped structure can easily cut open the sludge and move synchronously with the stirring blade. And the sludge supporting plates 4 are oppositely distributed on the inner side of the sludge plate 3. In this way, the sludge plate 3 and the sludge supporting plate 4 are well utilized to form a drug injection space 5. From Figure 1 and Figure 2 it can be seen that since the sludge dividing plate 3 is a long strip-shaped component distributed along the height direction of the main shaft, its height is generally the same as the height of the main shaft at the lower part of the chemical spraying assembly.

[0028] In this embodiment, two sets of stirring devices are used. The stirring devices at the same horizontal height have six blades, corresponding to three pairs of sludge dividing plates and their supporting sludge plates 4 distributed. Since this arrow-shaped structure is symmetrically distributed, the arrow-shaped structures of adjacent stirring blades back to back form multiple paths for the solidifying agent to penetrate deep into the sludge for delivery.

[0029] It is worth mentioning that the sludge supporting plate 4 in this embodiment is tangent to the rotation direction of the stirring blade 2, so that the sludge dividing plate 3 and the sludge supporting plate 4 form an arrow-shaped structure. A drug injection space 5 is formed between adjacent two sets of sludge supporting plates 4. When the stirring blade 2 stirs the sludge, the sludge dividing plate 3 separates the sludge, and the sludge supporting plate 4 supports the sludge, so that a space is formed at the drug injection space 5. At this time, the solidifying agent is directly sprayed into the sludge cavity at the drug injection space 5, mixed into the deep part of the sludge. After rotation, the sludge merges and mixes the agent into different layers of the sludge, increasing the solidifying effect.

[0030] In this embodiment, the cross section of the mud dividing plate is V-shaped, and the sludge can be efficiently cut apart when the stirring blade rotates, and the mud supporting plate supports the cut sludge, thereby forming a stable injection space. This dynamic cutting and supporting process can effectively reduce the accumulation of sludge on the opening side of the injection space. The rotating bottom plate in the medicine spraying assembly can rotate with the main shaft, so that the medicine spray head is always located directly above the injection space. In the process of the stirring blade continuously stirring to form a new injection space, the spray head can spray the medicine into the newly formed space in time, reducing the possibility of sludge blockage due to the static space. The injection space is located behind the stirring blade and is formed by the mud dividing plate and the mud supporting plate. When the stirring blade rotates, the injection space will continue to penetrate into the sludge with the movement of the stirring blade, so that the medicine can be directly sprayed to a deeper position, reducing the possibility of being absorbed in large quantities on the surface. The mud dividing plate cuts the sludge, and the mud supporting plate opens to form a space. After the medicine is sprayed, as the stirring blade continues to rotate, the surrounding sludge will be backfilled into the injection space and mixed with the medicine. This process of splitting, spraying and backfilling can fully mix the agent with the surrounding sludge in a short time, reducing the situation where the agent is excessively absorbed during the downward movement. This structural design relies on a single rotation direction to ensure that the mud-dividing plate and the mud-supporting plate can effectively split and support the sludge to form a stable injection space, so it is based on a specific rotation direction.

[0031] In this embodiment, the main shaft is provided with a protective sleeve 6, and a medicine spraying assembly is provided at the bottom of the protective sleeve 6. The medicine spraying assembly has a medicine spraying shell 7, and the medicine spraying shell 7 has a circular top and an annular side enclosure distributed along the edge of the annular top. A rotating bottom plate 9 that can rotate horizontally in the medicine spraying shell 7 is movably installed at the bottom open part of the medicine spraying shell 7. The inner center hole of the rotating bottom plate 9 allows the main shaft to pass through the rotating bottom plate 9. A plurality of groups of medicine feed pipes 8 are evenly distributed at intervals on the circular top of the medicine spraying shell. For example, six groups of medicine feed pipes are distributed in the circular top of the medicine spraying shell in the form of an annular array, and a plurality of groups of medicine liquid nozzles 9 cooperating with the medicine feed pipes are evenly distributed on the rotating bottom plate 9. The medicine liquid nozzle 9 is located directly above the medicine injection space 5 to facilitate spraying the external medicine liquid into the medicine injection space 5. Each group of medicine liquid nozzles and the medicine feed pipe are connected by a flexible telescopic connecting pipe 11. The flexible telescopic connecting pipe 11 includes but is not limited to a corrugated pipe. In this way, the rotating bottom plate 9 can rotate along with the main shaft, so that the stirring blades 2 and the mud dividing plate 3 can stir to form the drug injection space 5, and the drug spray head 10 can spray along the mud holes.

[0032] The lower surface of the circular top of the spraying shell and the top of the rotating bottom plate 9 are provided with matching sliding grooves 12 to facilitate the sliding rod 13 to slide thereon, see Figures 3-4As shown, the slide grooves 12 are inclined on their respective distribution surfaces. Taking the rotating base plate 9 as an example, the angle between the central axis O2 of the slide groove 12 and the vertical central axis O1 of the rotating base plate 9 is α, and α is an acute angle, for example, 36°. The slide grooves 12 on the rotating base plate 9 are distributed in a circular array around the center of the rotating base plate. There are three slide grooves 12, and a slide rod 13 is movably installed between the two groups of paired slide grooves 12 corresponding to each other. The end of the slide rod 13 is fixedly connected to the end of the slide groove 12 by a reset spring 14, so that the slide rod 13 can overcome the tension of the reset spring under the action of an external force and move along the slide groove, and reset along the slide groove 12 under the tension of the reset spring after the external force disappears. A toggle plate 15 is radially arranged on the side wall of the main shaft 1 at the position corresponding to the slide rod 13. In the present embodiment, three toggle plates are correspondingly distributed. The distance T2 between the far end of the slide groove 12 and the center of the main shaft is the same as the sum of the length T2 of the toggle plate and the diameter D of the slide rod (T2=T2+D). Therefore, after the wave rod 15 pushes the slide rod 13 to the far end of the slide groove 12, the toggle plate 15 can go over the slide rod 13 and continue to move forward, and the slide rod is reset by the pulling force of the reset spring 14, waiting for the next push of the toggle plate 15. In this process, the toggle plate 15 indirectly drives the rotating bottom plate 9 to rotate by pushing the slide rod 13 and the reset spring 14, and forms a periodic swing, so as to achieve the effect of following the injection space 5 for a distance to spray the medicine liquid into the sludge, and then reset to spray the medicine liquid on the sludge, thereby further enhancing the mixing effect of the medicine and the sludge.

[0033] It is worth mentioning that the cross section of the chute 12 is a structure that is narrow at the top and wide at the bottom. The two ends of the slide rod 13 are provided with anti-slip plates 16 that fit with the chute, so that the slide rod 13 cannot be separated from the chute 12, which plays the effect of supporting the spraying shell 7 and the rotating bottom plate 9. The end of the chute for installing the reset spring is a plane, and the slide rod 13 is integrally formed with a stabilizing block 17 at the same horizontal height of the reset spring. The end of the stabilizing block 17 close to the reset spring is a plane. The two sets of planes facilitate the installation of the reset spring. At the same time, the stabilizing block can also limit the rotation of the slide rod 13 in the chute to prevent the reset spring from being entangled on the slide rod 13 and damaging the reset spring.

[0034] During the construction of this method, the driving motor drives the main shaft 1 to rotate, and the liquid medicine pump pumps the liquid medicine to the medicine inlet pipe 8. The rotation of the main shaft 1 drives the stirring blade 2 to rotate, so that the mud dividing plate 3 welded on the stirring blade 2 cuts the sludge along the rotation direction of the stirring blade 2, and then is expanded by the mud supporting plate 4 to finally form a medicine injection space 5 (i.e., the medicine injection space formed by the arrow-shaped structure) behind the mud supporting plate 4. A space is opened in the sludge here, and at this time, the solidifying agent passes through the corrugated pipe from the medicine inlet pipe 8 and is sprayed from the medicine nozzle 10 to the sludge space, so that the solidifying agent is sprinkled deep in the sludge to increase the mixing effect of the agent.

[0035] The simultaneously rotating main shaft 1 drives the dialing plate 15 to rotate within the chemical spraying housing 7. When the dialing plate 15 comes into contact with the sliding rod 13, it squeezes the sliding rod 13, causing the sliding rod 13 to pull the return spring 14. The return spring 14 pulls the rotating bottom plate 9, thereby driving the chemical liquid nozzle 10 on the rotating bottom plate 9 to follow the medicine injection space 5 formed after being stirred by the stirring blade 2, enabling the solidified medicine to be sprayed along. When the dialing plate 15 further pushes the sliding rod 13, the sliding rod 13 moves to the farthest end of the sliding groove 12. At this time, the sliding rod 13 passes over the dialing plate 15 and is pulled back by the return spring 14. At the same time, the rotating bottom plate 9 is reset within the chemical spraying housing 7, driving the chemical liquid nozzle 10 to reset, spraying the liquid medicine on the unopened sludge, causing the solidified medicine to be mixed up and down, and further enhancing the medicine mixing effect.

[0036] Those of ordinary skill in the art can understand that the above-described embodiments are specific examples for implementing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. A method for in-situ solidification treatment of sludge in river regulation construction, wherein the method uses an in-situ solidification treatment device for sludge in river regulation construction to perform in-situ solidification treatment on the sludge. The in-situ solidification treatment device for sludge in river regulation construction comprises a main shaft connected to a motor and a stirring device installed on the main shaft. A spraying assembly is provided at the bottom of the protective sleeve of the main shaft, wherein: The method includes: An arrow-shaped structure that follows the movement of the spraying component is used to form a spraying space that penetrates deep into the sludge; Using the spraying component to spray the curing agent into the injection space; The injection space is located behind the stirring blade and is formed by the arrow-shaped mud dividing plate and mud supporting plate at the stirring device. When the stirring blade rotates, the agent in the injection space continues to penetrate into the sludge with the movement of the stirring blade, so that the agent can be sprayed directly to a deeper position, reducing the possibility of the agent being absorbed in large quantities on the surface of the sludge.

2. The method for in-situ solidification of sludge in river regulation construction according to claim 1, characterized in that: The method further comprises: The rotating bottom plate kit of the spraying assembly is used to periodically swing and spray the sludge.

3. The method for in-situ solidification of sludge in river regulation construction according to claim 1, characterized in that: Adjacent stirring blades of the stirring device are symmetrically provided with mud dividing plates, and the mud dividing plates are provided with relatively distributed mud supporting plates. The mud dividing plates and the mud supporting plates form an arrow-shaped structure, and the arrow-shaped structure forms a medicine injection space. The mud dividing plates and the mud supporting plates are distributed in a straight line along the height direction of the main axis, and the medicine spraying assembly is provided with a medicine spray head that cooperates with the medicine injection space.

4. The method for in-situ solidification of sludge in river regulation construction according to claim 3, characterized in that: The mud dividing plate is V-shaped.

5. The method for in-situ solidification of sludge in river regulation construction according to claim 3, characterized in that: The mud supporting plate is tangent to the rotation direction of the stirring blade.

6. The method for in-situ solidification of sludge in river regulation construction according to claim 3, characterized in that: The medicine spraying assembly comprises a medicine spraying shell, which is a bottom opening structure composed of a circular top and an annular enclosure distributed around the edge of the circular top. A plurality of groups of medicine inlet pipes are distributed in an annular array on the circular top of the medicine spraying shell. A rotating bottom plate which can rotate horizontally in the medicine spraying shell is movably installed at the opening of the medicine spraying shell. A plurality of groups of medicine spray heads which cooperate with the medicine inlet pipes are distributed in an annular array on the rotating bottom plate. Each group of medicine spray heads is connected to the medicine inlet pipe by a flexible telescopic connecting pipe. The medicine spray heads are located directly above the medicine injection space, and the rotating bottom plate can rotate with the rotation of the main shaft.

7. The in-situ solidification treatment device for sludge used in river regulation construction according to claim 6, characterized in that: The lower surface of the circular top of the spraying shell and the upper surface of the rotating bottom plate are matched to provide multiple groups of slide grooves, the slide grooves are inclined, and a slide rod that can slide along the slide groove is movably installed between the two corresponding groups of slide grooves, and a return spring is arranged between the end of the slide rod and the end of the slide groove, and a slide rod toggle plate that cooperates with the slide rod is radially installed on the side wall of the main shaft corresponding to the position of the slide rod, and the distance between the far end of the slide groove and the center of the main shaft is the same as the sum of the length of the slide rod toggle plate and the diameter of the slide rod.

8. The in-situ solidification treatment device for sludge used in river regulation construction according to claim 7, characterized in that: The cross section of the slide groove is a structure that is narrow at the top and wide at the bottom, and both ends of the slide rod are respectively provided with anti-slip plates that fit with the slide groove.

9. The in-situ solidification treatment device for sludge used in river regulation construction according to claim 7, characterized in that: One end of the slide groove for mounting the reset spring is a plane, and a stabilizing block is integrally formed at a position of the slide rod corresponding to the same horizontal height as the reset spring, and one end of the stabilizing block close to the reset spring is a plane.

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