A two-end gas inlet shell-and-tube dryer

Abstract

The utility model discloses a kind of two-end air intake's column tube drying machine, it is related to drying machine technical field, comprising: main cylinder, hollow in it, the main cylinder is equipped with steam inlet main pipe, the end of steam inlet main pipe is equipped with feed end steam rotary joint;End cap, fixedly connected with the main cylinder, the middle part of end cap is equipped with discharge end steam rotary joint;A group of first steam distribution branch pipe and a group of second steam distribution branch pipe are respectively fixedly connected with steam inlet main pipe, a group of first steam distribution branch pipe and a group of second steam distribution branch pipe respectively seal through the main cylinder;Annular steam buffer pipe, installed in the end of main cylinder, a group of first steam distribution branch pipe and a group of second steam distribution branch pipe are respectively fixedly connected with annular steam buffer pipe.The technical problem to be solved by the utility model is to provide a kind of two-end air intake's column tube drying machine, realize two-end steam inlet, simultaneously facilitate the condensate produced by discharge heat exchange tube.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, and more specifically, to a tube dryer with air inlets at both ends. Background Technology

[0002] The tube dryer with air inlet at both ends (also known as a steam tube rotary dryer or steam tube rotary kiln) is a large-scale rotary drying equipment that is indirectly heated and operates continuously. It uses saturated steam as a heat source and achieves deep dehydration by exchanging heat indirectly with the material through heating tubes arranged in the rotary cylinder.

[0003] Currently, there is a lack of a tube dryer with air intake at both ends, which would facilitate the intake of steam at both ends and the discharge of condensate generated by the heat exchange tubes. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a tube dryer with air intake at both ends, so as to realize steam intake at both ends and facilitate the discharge of condensate generated by heat exchange tubes.

[0005] This utility model achieves its invention objective using the following technical solution: A tube dryer with two-end air inlets, characterized in that it comprises: a main cylinder, which is hollow inside, wherein a steam inlet header is installed on the main cylinder, and a feed end steam inlet rotary joint is installed at the end of the steam inlet header; a head, which is fixedly connected to the main cylinder, and a discharge end steam inlet rotary joint is installed in the middle of the head; a set of first steam distribution branch pipes and a set of second steam distribution branch pipes are respectively fixedly connected to the steam inlet header, and the set of first steam distribution branch pipes and the set of second steam distribution branch pipes respectively seal through the main cylinder; an annular steam buffer pipe installed at the end of the main cylinder, and the set of first steam distribution branch pipes and the set of second steam distribution branch pipes are respectively fixedly connected to the annular steam buffer pipe; and a set of heat exchange pipes, which are respectively fixedly connected to the main cylinder, each heat exchange pipe being fixedly connected to one end of a steam connecting pipe, and the other end of each steam connecting pipe being fixedly connected to the annular steam buffer pipe. The first set of steam distribution branch pipes and the second set of steam distribution branch pipes consist of three pipes arranged in a concentric circle array. They are distributed at 60° intervals when projected onto a vertical plane along the length direction, and the heat exchange tubes are arranged longitudinally along the main cylinder.

[0006] As a further limitation of this technical solution, the annular steam buffer pipe is equipped with a set of non-condensable gas discharge valves for discharging non-condensable gases.

[0007] As a further limitation of this technical solution, a set of reinforcing plates are fixedly connected to a set of heat exchange tubes corresponding to the main cylinder. These plates are welded to the inner wall of the cylinder, forming a "tube-plate" truss structure with the heat exchange tubes, thereby improving the circumferential stiffness of the cylinder; preventing elliptical deformation of the main cylinder during full-load rotation; and avoiding weld cracking of the heat exchange tubes due to fatigue.

[0008] As a further limitation of this technical solution, an end plate is fixedly connected inside the head, and the end plate is fixedly connected to the end of the heat exchange tube. This ensures that all heat exchange tubes rotate synchronously with the head during rotation.

[0009] As a further limitation of this technical solution, the end cap is fixedly connected to a condensate siphon pipe, with the bottom of the condensate siphon pipe tightly attached to the end cap. Condensate is discharged without a pump using the siphon principle.

[0010] As a further limitation of this technical solution, a drain valve is installed at the bottom of the end cap. During shutdown maintenance, the drain valve is opened to quickly drain residual liquid and impurities from inside the end cap; during long-term operation, regular draining can prevent scale and sludge buildup, extending the equipment's lifespan.

[0011] As a further limitation of this technical solution, the main cylinder is fixedly connected to a set of inclined plates located inside the main cylinder body and welded along the spiral direction to form an "inner spiral guide plate". When the cylinder body rotates, it forces the material to be pushed towards the discharge end to prevent backflow; increases the effective contact time between the heat exchange tube and the material; and at the same time plays a secondary lifting plate role to further improve the drying uniformity.

[0012] As a further limitation of this technical solution, the main cylinder is fixedly connected to a set of external reinforcing plates. These plates are arranged longitudinally along the axial direction to improve the overall bending stiffness of the cylinder.

[0013] Compared with related technologies, the tube dryer with air inlet at both ends provided by this utility model has the following beneficial effects: (1) Through the steam distribution system of "double-ended rotary joint + annular buffer tube", continuous, leak-free and pump-free indirect heating is achieved; (2) The internal reinforcing plate, inclined plate and end plate form a rigid-heat-conducting-flow-guiding integrated structure, so that the cylinder maintains high rigidity and low deformation when rotating under full load, and ensures that the heat exchange tube and the material are in full contact. (3) The external reinforcing plate and the sewage and condensate valve group achieve safety, maintenance friendliness and waste heat recovery. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 For the present utility model Figure 1 A schematic diagram of a partial structure of AA.

[0016] Figure 3 For the present utility model Figure 1 A schematic diagram of a partial structure of BB.

[0017] In the diagram: 1. Main cylinder, 2. End cap, 3. Steam inlet rotary joint at the discharge end, 4. Condensate siphon pipe, 5. Drain valve, 6. End plate, 7. Heat exchange tube, 8. Reinforcing plate, 9. First steam distribution branch pipe, 10. Second steam distribution branch pipe, 11. Steam inlet header, 12. Steam inlet rotary joint at the feed end, 13. Steam connecting pipe, 14. Annular steam buffer pipe, 15. Valve, 16. Inclined plate, 17. Outer reinforcing plate. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] A tube dryer with two-end air inlets includes: a main cylinder 1, which is hollow inside, with a steam inlet header 11 installed on the main cylinder 1, and a feed end steam inlet rotary joint 12 installed at the end of the steam inlet header 11; a head 2, fixedly connected to the main cylinder 1, with a discharge end steam inlet rotary joint 3 installed in the middle of the head 2; a set of first steam distribution branch pipes 9 and a set of second steam distribution branch pipes 10 respectively fixedly connected to the steam inlet header 11, the first steam distribution branch pipes 9 and the second steam distribution branch pipes 10 respectively sealingly passing through the main cylinder 1; an annular steam buffer pipe 14, installed at the end of the main cylinder 1, the first steam distribution branch pipes 9 and the second steam distribution branch pipes 10 respectively fixedly connected to the annular steam buffer pipe 14; and a set of heat exchange pipes 7, respectively fixedly connected to the main cylinder 1, each heat exchange pipe 7 being fixedly connected to one end of a steam connecting pipe 13, and the other end of each steam connecting pipe 13 being fixedly connected to the annular steam buffer pipe 14. There are three sets of the first steam distribution branch pipe 9 and the second steam distribution branch pipe 10, arranged in a concentric circle array, and distributed at 60° intervals when projected in the vertical plane along the length direction. The heat exchange tube 7 is arranged longitudinally along the main cylinder 1.

[0020] The annular steam buffer pipe 14 is equipped with a set of non-condensable gas discharge valves 15 for discharging non-condensable gases.

[0021] The main cylinder 1 is fixedly connected to a set of heat exchange tubes 7 by a set of reinforcing plates 8. These plates are welded to the inner wall of the cylinder and form a "tube-plate" truss structure with the heat exchange tubes 7, thereby improving the circumferential stiffness of the cylinder and preventing elliptical deformation of the main cylinder 1 during full-load rotation, thus avoiding weld cracking of the heat exchange tubes 7 due to fatigue.

[0022] The end plate 6 is fixedly connected inside the end cap 2, and the end plate 6 is fixedly connected to the end of the heat exchange tube 7. This ensures that all heat exchange tubes 7 rotate synchronously with the end cap 2 during rotation.

[0023] The end cap 2 is fixedly connected to the condensate siphon pipe 4, with the bottom of the condensate siphon pipe 4 tightly attached to the end cap 2. Condensate is discharged without a pump using the siphon principle.

[0024] A drain valve 5 is installed at the bottom of the end cap 2. When the machine is shut down for maintenance, the drain valve 5 is opened to quickly drain the residual liquid and impurities inside the end cap 2. During long-term operation, regular draining can prevent the accumulation of scale and sludge and extend the service life of the equipment.

[0025] The main cylinder 1 is fixedly connected to a set of inclined plates 16, which are located inside the cylinder body and welded along the spiral direction to form an "inner spiral guide plate". When the cylinder rotates, the material is forced to push towards the discharge end to prevent backflow; it increases the effective contact time between the heat exchange tube and the material; at the same time, it plays a secondary lifting plate role to further improve the drying uniformity.

[0026] The main cylinder 1 is fixedly connected to a set of external reinforcing plates 17. These plates are arranged longitudinally along the axial direction to improve the overall bending stiffness of the cylinder.

[0027] The working principle of the tube dryer with air inlets at both ends provided by this utility model is as follows: Steam at the feed end: Steam at the feed end is connected to the steam source from the rotary joint 12. The steam enters the first steam distribution branch pipe 9 and the second steam distribution branch pipe 10 through the steam inlet header 11, then enters the annular steam buffer pipe 14, and then enters the heat exchange pipe 7 through the steam connecting pipe 13.

[0028] Steam inlet at the discharge end: Steam at the discharge end is connected to the steam source from the rotary joint 3, and after being distributed by the steam head 2, it enters the heat exchange tube 7.

[0029] The main cylinder 1 has an incline, and all the condensate is collected in the end cap 2 and then sucked out of the cylinder through the condensate siphon pipe 4, thus realizing steam inlet at both ends.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A tube dryer with air inlets at both ends, characterized in that, include: The main cylinder (1) is hollow inside. The main cylinder (1) is equipped with a steam inlet header (11). The end of the steam inlet header (11) is equipped with a feed end steam inlet rotary joint (12). End cap (2) is fixedly connected to the main cylinder (1), and a discharge end steam inlet rotary joint (3) is installed in the middle of the end cap (2). A first steam distribution branch pipe (9) and a second steam distribution branch pipe (10) are respectively fixedly connected to the steam inlet main pipe (11), and the first steam distribution branch pipe (9) and the second steam distribution branch pipe (10) are respectively sealed through the main cylinder (1). An annular steam buffer pipe (14) is installed at the end of the main cylinder (1), and a set of first steam distribution branch pipes (9) and a set of second steam distribution branch pipes (10) are respectively fixedly connected to the annular steam buffer pipe (14). A set of heat exchange tubes (7) are fixedly connected to the main cylinder (1). Each heat exchange tube (7) is fixedly connected to one end of the steam connecting pipe (13), and the other end of each steam connecting pipe (13) is fixedly connected to the annular steam buffer pipe (14).

2. The tube dryer with air inlets at both ends according to claim 1, characterized in that: The annular steam buffer pipe (14) is equipped with a set of non-condensable gas discharge valves (15).

3. The tube dryer with air inlets at both ends according to claim 1, characterized in that: The main tube (1) is fixedly connected to a set of reinforcing plates (8) corresponding to a set of heat exchange tubes (7).

4. The tube dryer with air inlets at both ends according to claim 1, characterized in that: The end plate (6) is fixedly connected inside the end cap (2), and the end plate (6) is fixedly connected to the end of the heat exchange tube (7).

5. The tube dryer with air inlets at both ends according to claim 1, characterized in that: The end cap (2) is fixedly connected to the condensate siphon pipe (4), and the bottom of the condensate siphon pipe (4) is tightly attached to the end cap (2).

6. The tube dryer with air inlets at both ends according to claim 1, characterized in that: A drain valve (5) is installed at the bottom of the end cap (2).

7. The tube dryer with air inlets at both ends according to claim 1, characterized in that: The main tube (1) is fixedly connected to a set of inclined plates (16).

8. The tube dryer with air inlets at both ends according to claim 1, characterized in that: The main tube (1) is fixedly connected to a set of external reinforcing plates (17).

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