Drying and distributing device for dredged sand

Abstract

The utility model relates to the technical field of dredged sand preparation systems, in particular to a drying and distributing device for dredged sand, which comprises a bin body, a feeding device and a discharging device. A central column is arranged in the middle of the bin; the base is arranged at the bottom of the bin body and provided with an annular inner cavity, and the side wall of the inner cavity is connected with the side wall of the bin body and communicated with the interlayer cavity; the spiral groove is spirally formed in the peripheral side of the central column and comprises a spiral outer layer, a spiral inner layer and a spiral connecting layer, hot air enters the interlayer cavity through the inner cavity of the base and flows circularly, then the hot air is blown to the slope surface of the stepped spiral groove through an air outlet of the spiral outer layer, and the dredged sand wet sand moves along the slope surface to be distributed and makes contact with the hot air at the same time, so that drying operation is achieved. The utility model aims to provide the dredged sand treatment device integrating drying and material distributing functions.

Description

TECHNICAL FIELD

[0001] The utility model relates to the dredged sand preparation system technical field, especially in kind for the drying and separating device of dredged sand. BACKGROUND

[0002] Dredged sand is a granular material obtained by removing the sediment at the bottom of water bodies such as river channels, lakes, and ports in water dredging projects. The main component of dredged sand is silt, which is widely used in reclamation, land consolidation, municipal engineering, and other fields.

[0003] Application No. CN202322160423.7 provides a dredged sand three-cylinder dryer, which includes an outer cylinder, an inner cylinder and a middle cylinder arranged inside the outer cylinder, the middle cylinder and the inner cylinder and the outer cylinder form a first channel and a second channel respectively, the inner side of the inner cylinder is provided with a plurality of first material lifting plates, the outer side of the inner cylinder is provided with a plurality of second material lifting plates, the outer side of the middle cylinder is provided with a plurality of third material lifting plates, the second material lifting plates are on the inner side of the first channel, the third material lifting plates are on the inner side of the second channel, the side of the middle cylinder is provided with a sealing plate, the middle of the sealing plate is provided with a stirring shaft, the outer side of the stirring shaft is provided with a plurality of stirring rods, the end of the plurality of stirring rods is provided with a stirring block, the sealing plate adjacent to the inlet of the first channel is provided with a plurality of guides for guiding the dredged sand into the first channel; the application achieves good throwing effect and guides the dredged sand into the channel, ensuring the effective operation of the drying operation.

[0004] Because the dredged sand has high moisture content and complex particle structure, and the existing drying equipment usually only has drying function, it is difficult to realize the particle size grading and screening treatment of the dredged sand; this leads to the need for additional independent material separating equipment in the industrial production process, making the overall process flow complex, the equipment layout occupies a large space, and seriously affects the continuity of production and the efficiency of resource processing, so it is necessary to provide a dredged sand treatment device integrating drying and material separating functions. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a dredged sand treatment device integrating drying and material separating functions.

[0006] The utility model discloses a drying and distributing device which comprises a bin body, a center column arranged in the middle of the bin, a base arranged at the bottom of the bin body, a spiral groove arranged on the side of the center column, a spiral outer layer fixed to the inner wall of the bin body, a spiral inner layer fixed to the center column, and a spiral connecting layer connected to the spiral outer layer and the spiral inner layer.

[0007] As a preferred technical solution of the utility model, the spiral outer layer, the spiral connecting layer and the spiral inner layer are provided with limiting parts that are mutually clamped to form a stepped structure with the height of the spiral outer layer gradually decreasing towards the spiral inner layer.

[0008] As a preferred technical solution of the utility model, the spiral outer layer and the spiral connecting layer adjacent thereto have a height difference, and the height difference is greater than the opening height of the air outlet.

[0009] As a preferred technical solution of the utility model, a feeding port is arranged above the feeding end of the spiral groove on the side wall of the bin body; the drying and distributing device is provided with a lifting device outside, the lifting device contains dredged sand wet sand, and the dredged sand wet sand is transported to the feeding port by the lifting device and then falls into the spiral groove.

[0010] As a preferred technical solution of the utility model, a hot air machine is arranged outside the base, and the pipeline of the hot air machine is connected to the inner cavity of the base.

[0011] As a preferred technical solution of the utility model, a guide plate is arranged on the side wall of the inner cavity of the base, and the guide plate is used to guide the hot air into the interlayer cavity.

[0012] As a preferred technical solution of the utility model, a sand prevention net is arranged at the air outlet, and the sand prevention net is arranged in a spiral shape corresponding to the shape of the air outlet.

[0013] As a preferred technical solution of the utility model, a discharging port is arranged on the side wall of the bin body corresponding to the discharging end of the spiral groove, the discharging port is provided with a sorting and collecting groove, and the sorting and collecting groove is provided with a distributing path corresponding to the feeding end of the spiral outer layer, the spiral inner layer and the spiral connecting layer to collect the dredged sand after distribution.

[0014] Compared with the prior art, the drying and distributing device has the following beneficial effects:

[0015] The drying and distributing device of the application realizes uniform distribution of hot air through the annular interlayer cavity formed by the base and the side wall of the bin body, and in combination with the multi-layer stepped spiral groove structure, high-temperature hot air is sprayed to each stepped slope surface along the spiral air outlet, a plurality of semi-closed heat cavities are formed, cavity circulation heating is realized, and the contact time and area of wet sand and hot air are effectively prolonged.

[0016] The specific technical scheme and beneficial effects of the application will be described in detail in the specific implementation mode below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0018] Figure 1 It is a schematic diagram of the drying and distributing device and the lifting device of the application.

[0019] Figure 2 It is a schematic diagram of the internal structure of the drying and distributing device of the application.

[0020] Figure 3 It is a schematic diagram of the structure of the spiral groove of the application.

[0021] Figure 4 It is Figure 3 It is an enlarged schematic diagram of A in the middle.

[0022] In the figure: 1, bin body; 11, interlayer cavity; 2, center column; 3, base; 4, spiral groove; 41, spiral outer layer; 411, air outlet; 42, spiral inner layer; 43, spiral connecting layer; 44, limiting part; 5, feed inlet; 6, lifting device; 7, hot air machine; 8, flow guide plate; 9, sorting and receiving groove. DETAILED DESCRIPTION

[0023] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] The utility model discloses a drying and distributing device for dredging sand, please refer to Figures 1 to 4 The bottom base 3 is fixedly connected with the side wall of the warehouse body 1, and the side wall of the warehouse body 1 is provided with a sandwich cavity 11 for annular distribution and heat transfer of hot air. The bottom base 3 is internally provided with an annular inner cavity, and the hot air flow direction is effectively guided through a flow guide plate 8. A hot air machine 7 is communicated with the inner cavity of the bottom base 3 through an external pipeline, so as to ensure that the hot air is fully introduced into the sandwich cavity 11. Thus, the hot air is distributed in a ring shape along the side wall of the warehouse body 1, and a heat channel is formed.

[0025] Further, the spiral groove 4 is arranged in a spiral around the center column 2 from top to bottom, and the whole is a multilayer stepped slope structure. The spiral groove 4 is composed of a spiral outer layer 41 fixedly connected to the inner wall of the warehouse body 1, a spiral inner layer 42 fixedly connected to the center column 2, and a spiral connecting layer 43 distributed between the two and connected through limiting clamping. The spiral outer layer 41 is provided with a spiral air outlet 411 distributed along the path of the spiral groove 4. The air outlet 411 is communicated with the sandwich cavity 11 and uniformly distributes the hot air. The air outlet 411 includes a plurality of continuous air outlets arranged along the surface of the spiral outer layer 41, or a through-type spiral air outlet 411 corresponding to the spiral curve of the spiral groove 4. Meanwhile, a spiral sand prevention net is arranged at the corresponding position of each air outlet 411, which effectively prevents sand particles and muddy water from flowing back and blocking the air outlet, and also ensures smooth air outlet and uniform airflow in the warehouse.

[0026] Further, the upper part of the bin body 1 is provided with an inlet 5 corresponding to the inlet end of the spiral groove 4, and the dredged sand is uniformly sent into the starting point of the spiral groove 4 by cooperating with the external lifting device 6, so that the wet sand enters the stepped spiral groove 4 slope in batches from top to bottom; specifically, a stepped height difference is arranged between the spiral outer layer 41 and the spiral connecting layer 43 adjacent to the spiral connecting layer 43, and the height difference is greater than the opening height of the air outlet 411, so that the hot air can pass through the air outlet 411 to the spiral groove 4 slope without obstruction, and the structure is prevented from being blocked by the airflow. The stepped height difference forms multiple material falling points at the same time, so that the wet sand realizes graded falling and dispersion during moving along the groove, prevents accumulation and blockage, promotes uniform spreading and enhances contact with hot air, significantly improves the material distribution effect and drying uniformity; the whole spiral groove 4 is arranged in multiple layers in the longitudinal direction, and multiple semi-closed heat chambers are naturally formed in the vertical direction, which are separated by the slope and the bottom of the spiral groove 4, so that the hot air circulates and accumulates in each heat chamber, optimizing the contact time and heating area of each layer of wet sand.

[0027] Further, after the dredged sand wet sand falls into the inlet 5, it slides step by step along the spiral slope from top to bottom, and turns and falls under the separation of multiple steps and the action of gravity. The sand and gravel with large particle size and low water content are preferentially thrown out or diverted at the upper high step stage, while the fine and high-water-content mud continues to slide along the spiral groove 4 to the end. The grading and material distribution process is carried out synchronously, effectively realizing the dispersion, spreading and grading of dredged sand wet sand with different particle sizes, ingredients and water contents, greatly avoiding accumulation, blockage and uneven heating, and enhancing the dispersibility and fluidity of the dredged sand wet sand in the hot air channel. At the same time, the hot air supplied by the interlayer cavity 11 penetrates the sand prevention net and is sprayed to each stepped slope and cavity heat field, ensuring that each step and each batch of wet sand is in full and uniform contact with high-temperature hot air, and quickly removes water. By using the spiral multi-layer stepped structure and cavity principle, the dredged sand wet sand and hot flow repeatedly intersect and contact, and each heat chamber forms an independent and efficient local drying environment, greatly improving the water evaporation rate and overall drying efficiency.

[0028] The working principle of the preferred embodiment of the present application is that the dredged sand wet sand is uniformly fed into the top of the bin body 1 through the feeding port 5, and first falls into the feeding end of the spiral groove 4, and slides down along the spiral slope surface from top to bottom by gravity. After passing through each step height difference, the dredged sand wet sand falls and disperses, realizing preliminary material distribution and grading. At the same time, the hot air blower 7 in the base 3 sends hot air into the annular inner cavity of the base 3, which is guided by the guide plate 8 and then enters the side wall interlayer cavity 11 of the bin body 1, and is uniformly distributed along the annular channel. The hot air is sprayed to the slope surface of each step spiral groove 4 through the air outlet 411 of the spiral outer layer 41 and the sand prevention net. In the vertical direction, a plurality of hot cavities are formed. In each hot cavity, the hot air fully contacts the dredged sand wet sand on the corresponding step, prolongs the heating path and residence time, and promotes water evaporation. Thus, the dredged sand wet sand with larger size and lower water content is preferentially distributed at the upper high step stage, and the fine particles and the part with higher water content continue to slide along the spiral groove 4 to the end. Finally, the dried dredged sand is discharged through the discharge port provided in the discharge end of the corresponding spiral groove 4 in the side wall of the bin body 1. The discharge port is provided with a sorting and collecting groove 9. The feeding end of the sorting and collecting groove 9 corresponding to the spiral outer layer 41, the spiral inner layer 42 and the spiral connecting layer 43 is respectively provided with a material distribution path, which is used for collecting the distributed dredged sand, realizing the integrated operation of drying, grading and material distribution and collection of the dredged sand wet sand.

[0029] It should be understood that the structures, proportions, sizes and the like shown in the drawings of the present application are only used to cooperate with the disclosed content, to be understood and read by those skilled in the art, and do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose of the present application, should still fall within the scope of the disclosed technology.

[0030] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents. These modifications or replacements do not change the essence of the corresponding technical solutions out of the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A drying and distributing device for dredged sand, characterized in that, The drying and distributing device includes: The silo body (1) has an annular interlayer cavity (11) on its side wall; a central column (2) is located in the center of the silo. The base (3) is located at the bottom of the compartment (1) and has an annular inner cavity. The side wall of the inner cavity is fixed to the side wall of the compartment (1) and communicates with the interlayer cavity (11). A spiral groove (4), spirally disposed around the central column (2), includes: The outer spiral layer (41) is fixed to the inner wall of the chamber (1), and a spiral air outlet (411) is provided on it, which is connected to the interlayer cavity (11). The inner spiral layer (42) is fixed to the central column (2); The spiral connecting layer (43) is respectively limited and connected to the outer spiral layer (41) and the inner spiral layer (42) to form the spiral groove (4) with a stepped slope. In this process, hot air enters the interlayer cavity (11) through the inner cavity of the base (3) and circulates thereafter. It is then blown onto the slope of the stepped spiral groove (4) through the air outlet (411) of the spiral outer layer (41). The dredged sand and wet sand move along the slope and are distributed, while simultaneously coming into contact with the hot air to achieve drying.

2. The drying and distributing device for dredged sand according to claim 1, characterized in that, The outer spiral layer (41), the spiral connecting layer (43), and the inner spiral layer (42) are provided with mutually engaging limiting parts (44) to form a stepped structure in which the height gradually decreases from the outer spiral layer (41) to the inner spiral layer (42).

3. A drying and distributing device for dredged sand according to claim 2, characterized in that, There is a height difference between the outer spiral layer (41) and the adjacent spiral connecting layer (43), which is greater than the opening height of the air outlet (411).

4. A drying and distributing device for dredged sand according to claim 1, characterized in that, On the side wall of the silo (1), there is a feed inlet (5) located above the feed end of the spiral groove (4).

5. A drying and distributing device for dredged sand according to claim 4, characterized in that, The drying and distributing device is equipped with a lifting device (6) on the outside. The lifting device (6) contains dredged wet sand. The dredged wet sand is transported to the feed inlet (5) by the lifting device (6) and then falls into the spiral groove (4).

6. A drying and distributing device for dredged sand according to claim 1, characterized in that, A hot air blower (7) is provided outside the base (3), and the hot air blower (7) is connected to the inner cavity of the base (3) by a pipe.

7. A drying and distributing device for dredged sand according to claim 1, characterized in that, The base (3) has a guide plate (8) on its inner cavity side wall, which is used to guide hot air into the interlayer cavity (11).

8. A drying and distributing device for dredged sand according to claim 1, characterized in that, A sand-proof net is provided at the air outlet (411). The sand-proof net is arranged in a spiral shape and corresponds to the opening shape of the air outlet (411).

9. A drying and distributing device for dredged sand according to claim 1, characterized in that, On the side wall of the silo (1), a discharge port is provided corresponding to the discharge end of the spiral groove (4). The discharge port is provided with a sorting and receiving trough (9). The sorting and receiving trough (9) is provided with a material distribution path corresponding to the feeding end of the outer spiral layer (41), the inner spiral layer (42), and the spiral connecting layer (43) for collecting the dredged sand after material distribution.

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