Continuous feed steam dryer

Abstract

Continuous feeding steam dryer relates to the technical field of drying device, including the barrel shell which is horizontally arranged in a cylindrical shape, the spiral conveying blade is coaxially and rotatably installed in the barrel shell, the heat exchange jacket is coaxially and fixedly connected on the outer wall of the barrel shell, the water vapor discharge hole area is formed on the upper end of the barrel shell along the axial direction, two axial extension partitions are fixedly connected in parallel in the heat exchange jacket, a plurality of partition plates are fixedly connected in parallel in the axial direction in the heat exchange jacket, and the inner cavity of the heat exchange jacket is divided into a plurality of independent heat exchange cavities through the partition plates. The steam dryer in the prior art cannot realize the continuous feeding of the material during use, thereby affecting the supply efficiency of the material; and when the steam is introduced into the existing device for heat exchange, the steam which is first exchanged with the material is reduced in temperature, cannot meet the drying use of the subsequent material, and affects the uniformity of the material drying.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, specifically to a continuously fed steam dryer. Background Technology

[0002] Steam dryers with continuous feed are key equipment for continuous dehydration of wet materials in chemical production. Using steam as a heat source (clean and with easily controllable temperature), they integrate continuous feeding, heat transfer drying, and continuous discharge processes to meet the needs of large-scale and automated chemical production. They are widely used in the drying of materials such as fertilizers, pigments, resins, and salts.

[0003] A prior art patent with publication number CN104251607A discloses a scheme comprising: a cylindrical rotatable drum having an inlet end and an outlet end; a plurality of steam pipe elements inserted into and rotating with the drum, each steam pipe element including an axial pipe parallel to the longitudinal direction of the drum and interconnected by a transverse intermediate pipe; a fixed end chamber and a steam distributor manifold arranged in the outlet end region; and a material conveying tool disposed at the inlet end for supplying wet or liquid material into the steam dryer for evaporation. The fixed end chamber is arranged in the outlet end region between the axially discharging end plate and the inlet end plate, such that the discharging end plate is located outside the outlet end chamber. The outlet end chamber surrounds a portion of the drum and has a lower opening for discharging dry material or residual liquid and an upper opening for discharging exhaust gas from the drum. The steam distributor manifold is arranged at the outlet end, located outside the discharging end plate.

[0004] Existing devices, including those mentioned above, have gradually revealed shortcomings in the technology with use, mainly in the following aspects:

[0005] First, existing steam dryers cannot achieve continuous material feeding during use, which affects the material supply efficiency.

[0006] Secondly, the existing equipment uses a one-in-one-out method when introducing steam for heat exchange. This causes the temperature of the steam that exchanges heat with the material first to drop, making it unable to meet the drying requirements of the subsequent material and affecting the uniformity of material drying.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] To address the shortcomings of existing technologies, the continuous feeding steam dryer provided by this utility model solves the problems of traditional steam dryers being unable to continuously feed materials, thus affecting the material supply efficiency; and the existing devices using a one-in-one-out steam exchange method, which causes the temperature of the steam that first exchanges heat with the material to drop, making it unsuitable for drying subsequent materials and affecting the uniformity of material drying.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A continuously fed steam dryer includes a horizontally arranged cylindrical shell. A spiral conveying blade is coaxially rotatably mounted inside the shell. A heat exchange jacket is coaxially fixed to the outer wall of the shell. A water vapor discharge port area is axially formed at the upper end of the shell. Two axially extending baffles are fixedly connected side-by-side inside the heat exchange jacket. The water vapor discharge port area is located between the two baffles. A steam vent is provided at the top of the heat exchange jacket between the two baffles.

[0011] Several partition plates are fixedly connected in parallel along the axial direction inside the heat exchange jacket, and the inner cavity of the heat exchange jacket is divided into several independent heat exchange cavities by the partition plates.

[0012] As an optimized solution, a steam inlet cylinder and a steam outlet cylinder are fixedly connected to each heat exchange cavity on the opposite side wall near the top of the heat exchange jacket.

[0013] As an optimized solution, a connecting rod is vertically fixed to the spiral conveyor blade in the area between adjacent blades, and a material feeding plate is fixed to the other end of the connecting rod.

[0014] As an optimized solution, the feeding plate is inclined to the axial direction of the spiral conveyor blade.

[0015] As an optimized solution, a water vapor discharge chamber shell covering the exhaust port is fixed to the outer wall of the heat exchange jacket, and a suction cylinder is provided on the water vapor discharge chamber shell.

[0016] As an optimized solution, a number of heat exchange fins are fixedly connected in parallel along the axial direction on the outer wall of the shell inside the heat exchange jacket.

[0017] As an optimized solution, a material inlet cylinder is fixedly connected to the upper end of one end of the cylinder shell, which communicates with its inner cavity.

[0018] As an optimized solution, a material discharge cylinder communicating with its inner cavity is fixedly connected to the lower end of the other end of the shell.

[0019] As an optimized solution, a drive motor is fixedly connected to the outer end of the cylindrical shell, and the output shaft of the drive motor is fixedly connected to the end of the central shaft of the spiral conveying blade.

[0020] As an optimized solution, the partition plate and the heat exchange fins are respectively provided with clearance notches to avoid the area between the two partition plates.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] By setting up a cylindrical shell with rotating spiral conveying blades inside, continuous material conveying can be achieved. A heat exchange jacket is set on the outside of the cylindrical shell. Steam is introduced into the heat exchange jacket to exchange heat with the material inside. The material comes into full contact with the heating surface on the inner wall of the cylindrical shell, the material temperature rises, and the internal moisture evaporates into water vapor. The water vapor is discharged to the outside through the water vapor discharge hole area, realizing the simultaneous conveying and drying of the material and achieving continuous feeding.

[0023] Several partition plates are fixedly connected in parallel along the axial direction inside the heat exchange jacket, dividing the inner cavity of the heat exchange jacket into several independent heat exchange cavities. Each heat exchange cavity is connected to a steam inlet cylinder and a steam outlet cylinder, thereby modularizing the inner cavity of the heat exchange jacket into several independent small units. This can improve the heat exchange efficiency between steam and materials, overcome the phenomenon that the steam temperature is lower at the steam outlet cylinder due to the long axial length of the cylinder shell, reduce the temperature difference between the steam inlet cylinder and the steam outlet cylinder, improve the drying efficiency of materials, and provide uniformity of material drying. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the cylindrical shell of this utility model.

[0027] In the diagram: 1-Shell; 2-Screw conveyor blade; 3-Driver; 4-Heat exchange jacket; 5-Separator; 6-Heat exchange cavity; 7-Heat exchange fins; 8-Water vapor discharge port area; 9-Water vapor discharge cavity shell; 10-Suction cylinder; 11-Material inlet cylinder; 12-Material outlet cylinder; 13-Connecting rod; 14-Pulling plate; 15-Baffle plate; 16-Steam inlet cylinder; 17-Steam outlet cylinder. Detailed Implementation

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0029] like Figure 1 and Figure 2 As shown, the continuously fed steam dryer includes a cylindrical shell 1 arranged horizontally. A spiral conveying blade 2 is coaxially rotatably mounted inside the shell 1. A heat exchange jacket 4 is coaxially fixed to the outer wall of the shell 1. A water vapor discharge port area 8 is axially formed at the upper end of the shell 1. Two axially extending baffles 15 are fixedly connected side-by-side inside the heat exchange jacket 4. The water vapor discharge port area 8 is located between the two baffles 15. A steam vent is provided at the top of the heat exchange jacket 4 between the two baffles 15.

[0030] Several partition plates 5 are fixedly connected in parallel along the axial direction inside the heat exchange jacket 4, and the inner cavity of the heat exchange jacket 4 is divided into several independent heat exchange cavities 6 by the partition plates 5. The partition plates 5 are fixedly sealed with the partition plate 15, the outer wall of the shell 1, and the inner wall of the heat exchange jacket 4.

[0031] On the opposite side wall near the top of the heat exchange jacket 4, a steam inlet cylinder 16 and a steam outlet cylinder 17 are fixedly connected to each heat exchange cavity 6.

[0032] The spiral conveyor blade 2 is vertically fixed to a connecting rod 13 in the area between adjacent blades. The other end of the connecting rod 13 is fixed to a material-pushing plate 14, which can realize secondary material-pushing of the material by the spiral conveyor blade 2 during rotation, increase the displacement between materials and improve drying efficiency.

[0033] The material guide plate 14 is inclined to the axial direction of the screw conveyor blade 2 to guide and move the material.

[0034] A water vapor discharge chamber shell 9 covering the exhaust port is fixed to the outer wall of the heat exchange jacket 4. A suction cylinder 10 is provided on the water vapor discharge chamber shell 9. The suction cylinder 10 can be connected to negative pressure to extract water vapor.

[0035] Several heat exchange fins 7 are fixedly connected in parallel along the axial direction on the outer wall of the shell 1 inside the heat exchange jacket 4.

[0036] A material inlet cylinder 11, which communicates with the inner cavity of the cylinder shell 1, is fixedly connected to the upper end of one end of the cylinder shell 1. A hopper can be connected to the material inlet cylinder 11.

[0037] The lower end of the other end of the cylinder shell 1 is fixedly connected to a material discharge cylinder 12 that communicates with its inner cavity.

[0038] A drive motor 3 is fixedly connected to the outer end of the cylindrical shell 1, and the output shaft of the drive motor 3 is fixedly connected to the end of the central shaft of the spiral conveying blade 2.

[0039] The partition plate 5 and the heat exchange fin 7 are respectively provided with clearance notches to avoid the area between the two partition plates 15.

[0040] The working principle of this device is as follows:

[0041] By setting up a cylindrical shell 1 and rotating spiral conveying blades 2 inside, continuous material conveying can be achieved. A heat exchange jacket 4 is set outside the cylindrical shell 1. Steam is introduced into the heat exchange jacket 4 to exchange heat with the material inside. The material comes into full contact with the heating surface of the inner wall of the cylindrical shell 1, the material temperature rises, and the internal moisture evaporates into water vapor. The water vapor is discharged to the outside through the water vapor discharge hole area 8, realizing the simultaneous conveying and drying of the material and achieving continuous feeding.

[0042] Several partition plates 5 are fixedly connected in parallel along the axial direction inside the heat exchange jacket 4, dividing the inner cavity of the heat exchange jacket 4 into several independent heat exchange cavities 6. Each heat exchange cavity 6 is connected to a steam inlet cylinder 16 and a steam outlet cylinder 17, thereby modularizing the inner cavity of the heat exchange jacket 4 into several independent small units. This can improve the heat exchange efficiency between steam and materials, overcome the phenomenon that the steam temperature at the steam outlet cylinder 17 is low due to the long axial length of the cylinder shell 1, reduce the temperature difference between the steam inlet cylinder 16 and the steam outlet cylinder 17, improve the drying efficiency of materials, and provide uniformity of material drying.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A continuously fed steam dryer, characterized in that: The device includes a cylindrical shell (1) arranged horizontally, with a spiral conveying blade (2) coaxially mounted inside the shell (1). A heat exchange jacket (4) is coaxially fixed to the outer wall of the shell (1). A water vapor discharge port area (8) is provided axially at the upper end of the shell (1). Two axially extending partitions (15) are fixedly connected side by side inside the heat exchange jacket (4). The water vapor discharge port area (8) is located between the two partitions (15). A steam vent is provided at the top of the heat exchange jacket (4) between the two partitions (15). Several partition plates (5) are fixedly connected in parallel along the axial direction inside the heat exchange jacket (4), and the inner cavity of the heat exchange jacket (4) is divided into several independent heat exchange cavities (6) by the partition plates (5).

2. The continuously fed steam dryer according to claim 1, characterized in that: On the opposite side wall near the top of the heat exchange jacket (4), a steam inlet cylinder (16) and a steam outlet cylinder (17) connected to each heat exchange cavity (6) are fixedly connected.

3. The continuously fed steam dryer according to claim 1, characterized in that: The spiral conveying blade (2) is vertically fixed to a connecting rod (13) in the area between adjacent blades, and the other end of the connecting rod (13) is fixed to a material feeding plate (14).

4. The continuously fed steam dryer according to claim 3, characterized in that: The feeding plate (14) is inclined to the axial direction of the spiral conveying blade (2).

5. The continuously fed steam dryer according to claim 1, characterized in that: A water vapor discharge chamber shell (9) covering the exhaust port is fixed to the outer wall of the heat exchange jacket (4), and a suction cylinder (10) is provided on the water vapor discharge chamber shell (9).

6. The continuously fed steam dryer according to claim 1, characterized in that: The outer wall of the cylindrical shell (1) inside the heat exchange jacket (4) has several heat exchange fins (7) fixedly connected in parallel along the axial direction.

7. The continuously fed steam dryer according to claim 1, characterized in that: The upper end of one end of the cylindrical shell (1) is fixed with a material inlet cylinder (11) that communicates with its inner cavity.

8. The continuously fed steam dryer according to claim 1, characterized in that: The lower end of the other end of the cylindrical shell (1) is fixedly connected to a material discharge cylinder (12) that communicates with its inner cavity.

9. The continuously fed steam dryer according to claim 1, characterized in that: A drive motor (3) is fixedly connected to the outer end of the cylindrical shell (1), and the output shaft of the drive motor (3) is fixedly connected to the end of the central shaft of the spiral conveying blade (2).

10. The continuously fed steam dryer according to claim 6, characterized in that: The partition plate (5) and the heat exchange fin (7) are respectively provided with clearance notches to avoid the area between the two partition plates (15).

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