Bentonite drying device

Abstract

The utility model provides a bentonite drying device which is characterized in that a drying cylinder is rotationally connected to a base, and a feeding sleeve and a discharging sleeve are rotationally and hermetically connected to the two ends of the drying cylinder respectively; a heat inlet pipe is arranged at the end of the feeding sleeve, and the discharging sleeve extends towards the end, close to the feeding sleeve, of the drying cylinder through a heat return pipeline. Each drying grating plate is composed of a plurality of hollow metal pipes which communicate with one another, the shape of the drying grating plates is matched with that of an inner cavity of the drying cylinder, and the multiple drying grating plates are distributed at the end, close to the feeding sleeve, of the drying cylinder at intervals; and the drying grating plate is arranged, the bentonite is rapidly heated and scattered in the early stage of drying, and therefore the drying time is shortened, the possibility that the bentonite is rolled into balls is reduced, and the drying quality of the bentonite is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bentonite production, and particularly relates to a bentonite drying device. Background Art

[0002] Bentonite is an important geotechnical material and industrial raw material with a wide range of application backgrounds. Bentonite is often used for soil improvement, which can increase the stability and bearing capacity of the soil, change the moisture characteristics of the soil, and increase the anti-seepage performance of the soil. In engineering foundations with poor soil quality, adding bentonite can improve the stability and anti-settlement ability of the foundation. During the preparation of bentonite, drying is usually required. Existing dryers generally use hot air drying. In the early stage of drying, the humidity of bentonite is relatively high, and the drying difficulty is relatively large, resulting in a relatively long drying time. However, bentonite will solidify into balls after rolling in the dryer for a long time, and it is not easy to dry the inside of the balls, which does not meet the production requirements.

[0003] Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies of the existing technology. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the existing technology, and the utility model provides a bentonite drying device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A bentonite drying device includes:

[0007] A drying cylinder, the drying cylinder is rotatably connected to a base, and a feed sleeve and a discharge sleeve are respectively rotatably and sealingly connected to both ends of the drying cylinder;

[0008] An inlet heat pipe, the inlet heat pipe is provided at the end of the feed sleeve, and the discharge sleeve extends towards one end of the drying cylinder close to the feed sleeve through a heat recovery pipeline;

[0009] A drying grille plate, the drying grille plate is composed of a plurality of hollow metal pipes that are interconnected, the shape of the drying grille plate is adapted to the inner cavity of the drying cylinder, and a plurality of the drying grille plates are spaced apart and distributed at one end of the drying cylinder close to the feed sleeve;

[0010] The drying grille plate is correspondingly connected to the heat recovery pipeline.

[0011] Preferably, two bases respectively support both ends of the drying cylinder, an arc-shaped support plate corresponding to the drying cylinder is provided above the base, a plurality of installation grooves are provided on the inner wall of the arc-shaped support plate, and rollers that abut against the outer wall of the drying cylinder are rotatably connected in the installation grooves.

[0012] Preferably, a gear ring corresponding to and close to one of the bases is provided on the outer wall of the drying cylinder, and a driving motor that meshes with the gear ring through a gear is provided on the base.

[0013] Preferably, a plurality of connecting pipes are evenly distributed between any two adjacent drying grille plates, and both ends of the connecting pipe are respectively communicated with the two adjacent drying grille plates.

[0014] Preferably, the drying grille plate far from the feed sleeve is correspondingly communicated with the heat regeneration pipeline, and a heat outlet pipe is provided on the drying grille plate close to the feed sleeve, and the heat outlet pipe extends out of the drying cylinder.

[0015] Preferably, a feed pipe is provided on the feed sleeve;

[0016] The discharge sleeve is of a flared structure, and a discharge pipe is provided along the lower edge of the end of the discharge sleeve, and the discharge pipe is correspondingly connected to a spiral feeder.

[0017] Preferably, a helically extending guide plate is provided on the inner wall of the drying cylinder.

[0018] Beneficial effects: By providing drying grille plates, the bentonite is rapidly heated up and dispersed in the early stage of drying, thereby reducing the drying time, reducing the possibility of the bentonite rolling into balls, and thus improving the drying quality of the bentonite. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The schematic diagrams of the drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. Among them:

[0020] Figure 1 is a structural schematic diagram of a drying device in a specific embodiment provided by the present utility model;

[0021] Figure 2 is a sectional schematic diagram of a drying device in a specific embodiment provided by the present utility model;

[0022] Figure 3 is a structural schematic diagram of a drying grille plate in a specific embodiment provided by the present utility model.

[0023] In the figure: 1, drying cylinder; 2, feed sleeve; 3, discharge sleeve; 4, spiral feeder; 5, base; 6, feed pipe; 7, heat inlet pipe; 8, heat regeneration pipeline; 9, gear ring; 10, driving motor; 11, drying grille plate; 12, connecting pipe; 13, material lifting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model belong to the scope of protection of the present utility model.

[0025] In the description of the present utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than requiring the present utility model to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. The terms "connected" and "connected" used in the present utility model should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0027] As Figures 1-3 shown, a bentonite drying device includes a drying cylinder 1, a heat inlet pipe 7, and a drying grille plate 11. Among them, the drying cylinder 1 is rotatably connected to a base 5, and the base 5 can be a metal truss or formed by concrete pouring. At both ends of the drying cylinder 1, a feed sleeve 2 and a discharge sleeve 3 are respectively rotatably and sealingly connected. The specific rotatable and sealing connection structure is the same as that of the prior art and will not be elaborated here. The feed sleeve 2 and the discharge sleeve 3 are fixed to the underlying base 5. The drying cylinder 1 rotates to dry and conduct the bentonite inside. A heat inlet pipe 7 is provided at the end of the feed sleeve 2, and the heat inlet pipe 7 is correspondingly connected to a hot air blower for supplying hot air into the drying cylinder 1. The hot air flows with the material towards the discharge sleeve 3. A heat recovery pipeline 8 is provided above the discharge sleeve 3, and the heat recovery pipeline 8 extends towards one end of the drying cylinder 1 close to the feed sleeve 2.

[0028] The drying grille plate 11 is composed of a plurality of interconnected hollow metal tubes. Specifically, it includes an annular metal tube. The shape of the drying grille plate 11 is adapted to the inner cavity of the drying cylinder 1. Specifically, there is a spacing between the annular metal tube and the drying cylinder 1, and the spacing is not less than the width of the spiral guide plate to ensure the passage of materials. A plurality of straight tubes are provided inside the annular metal tube, and the plurality of straight tubes are spaced apart to form a grid. The straight tubes and the annular tube are interconnected. The drying grille plate 11 is fixed to the inner wall of the drying cylinder 1 through a connecting hoop. A plurality of drying grille plates 11 are spaced apart at one end of the drying cylinder 1 close to the feed sleeve 2. In this embodiment, the number of drying grille plates 11 can be 2 - 4. In this implementation, the number of drying grille plates 11 is designed to be 2. The drying grille plate 11 is correspondingly connected to the regenerative pipeline 8, so as to conduct heat through the drying grille plate 11 and place it inside the bentonite during the material drying process, thereby quickly heating the bentonite.

[0029] In an alternative embodiment, the two bases 5 are respectively supported at both ends of the drying cylinder 1. The drying cylinder 1 is a metal cylinder. An arc-shaped support plate corresponding to the drying cylinder 1 is provided above the base 5. The arc-shaped support plate is a metal plate or a truss structure welded by metal square tubes or round tubes. Further, the arc-shaped support plate and the base 5 are integrally cast with concrete. A plurality of installation grooves are provided on the inner wall of the arc-shaped support plate. Metal parts are embedded in the installation grooves during concrete pouring, so that rollers in rolling connection with the outer wall of the drying cylinder 1 can be rotatably connected in the installation grooves. There are at least two rollers, and they are symmetrically distributed on both sides of the drying cylinder 1. The axis of the rollers is parallel to the drying cylinder 1, and the outer wall of the rollers extends out of the inner wall of the arc-shaped support plate, so as to form a rolling contact with the drying cylinder 1.

[0030] In an alternative embodiment, a toothed ring 9 corresponding to one of the bases 5 is provided on the outer wall of the drying cylinder 1. Tooth grooves are provided on the outer periphery of the toothed ring 9. A driving motor 10 that meshes with the toothed ring 9 through a gear is provided on the base 5. The driving motor 10 drives the drying cylinder 1 to rotate through the gear.

[0031] In an alternative embodiment, a plurality of metal connecting tubes 12 are evenly distributed between any two adjacent drying grille plates 11. The plurality of connecting tubes 12 are arranged in an array. Both ends of the connecting tube 12 are respectively connected to the two adjacent drying grille plates 11, so that the two drying grille plates 11 are interconnected. The drying grille plate 11 far from the feed sleeve 2 is correspondingly connected to the regenerative pipeline 8. A heat outlet pipe is provided on the drying grille plate 11 close to the feed sleeve 2, and the heat outlet pipe extends out of the drying cylinder 1, so as to recycle and reuse the heat and make full use of the heat.

[0032] In an alternative embodiment, a feed pipe 6 is provided on the feed sleeve 2. After extending into the feed sleeve 2, the feed pipe 6 extends into the drying cylinder 1. The discharge sleeve 3 is of a flared structure, and the flared structure can guide the exported bentonite downward. A discharge pipe is provided along the lower edge of the end of the discharge sleeve 3, and the discharge pipe is correspondingly connected to a spiral feeder 4 to conduct the dried bentonite.

[0033] In an alternative embodiment, a helically extending guide plate is provided on the inner wall of the drying cylinder 1. The guide plate is generally arranged in the drying cylinder 1. A plurality of sets of lifting plates 13 are provided on the inner wall of the drying cylinder 1. Each set of lifting plates 13 includes a plurality of L-shaped plates evenly distributed along the axial direction of the drying cylinder 1. One end of each set of lifting plates 13 corresponding to the axial direction of the drying cylinder 1 points to the rotation direction of the drying cylinder 1, so as to lift the bentonite and ensure sufficient contact between the material and the hot air.

[0034] A plurality of sets of lifting plates 13 are evenly distributed in the length direction of the drying cylinder 1. The ends of the feed sleeve 2 and the discharge sleeve 3 away from the drying cylinder 1 are closed ends, and inspection windows are provided on the closed ends. Windows are provided on the inspection windows, and the windows are connected to the side of the window in a detachable manner. Taking the feed sleeve 2 as an example, a sealing ring is provided between the window and the inspection window, and the side of the window is hinged to the side wall of the feed sleeve 2 through a hinge.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A bentonite drying device, characterized in that, Comprising: A drying cylinder rotatably connected to a base, and an inlet sleeve and an outlet sleeve are respectively rotatably and sealingly connected to both ends of the drying cylinder; An inlet heat pipe provided at the end of the inlet sleeve, and the outlet sleeve extends towards one end of the drying cylinder close to the inlet sleeve through a heat recovery pipeline; A drying grille plate composed of a plurality of interconnected hollow metal pipes, the shape of the drying grille plate is adapted to the inner cavity of the drying cylinder, and a plurality of the drying grille plates are spaced apart at one end of the drying cylinder close to the inlet sleeve; The drying grille plate is correspondingly connected to the heat recovery pipeline.

2. The bentonite drying device according to claim 1, wherein, Two of the bases respectively support both ends of the drying cylinder, and an arc-shaped support plate corresponding to the drying cylinder is provided above the base. A plurality of mounting grooves are provided on the inner wall of the arc-shaped support plate, and rollers abutting against the outer wall of the drying cylinder are rotatably connected in the mounting grooves.

3. The bentonite drying device according to claim 2, wherein, A toothed ring corresponding to and close to one of the bases is provided on the outer wall of the drying cylinder, and a driving motor that meshes with the toothed ring through a gear is provided on the base.

4. The bentonite drying device according to claim 1, characterized in that, A plurality of connecting pipes are evenly distributed between any two adjacent drying grille plates, and both ends of the connecting pipe are respectively communicated with adjacent two drying grille plates.

5. The bentonite drying device according to claim 1, characterized in that, The drying grille plate far from the inlet sleeve is correspondingly communicated with the heat recovery pipeline, and an outlet heat pipe is provided on the drying grille plate close to the inlet sleeve, and the outlet heat pipe extends out of the drying cylinder.

6. The bentonite drying device according to claim 1, wherein, An inlet pipe is provided on the inlet sleeve; The outlet sleeve is of a flared structure, and a discharge pipe is provided along the lower edge of the end of the outlet sleeve, and the discharge pipe is correspondingly connected to a spiral feeder.

7. The bentonite drying device according to claim 1, characterized in that, A spiral guide plate is provided on the inner wall of the drying cylinder.

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