A tube dryer with a differential steam collecting pipe
By placing an annular steam buffer tube on the outer ring heat exchange tube in the tube dryer, and using a serpentine connecting pipe and welded joint, the problem of hose damage and leakage caused by stress in traditional tube dryers is solved, and stable operation of the equipment is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG HUAYI HEAVY IND CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-03
AI Technical Summary
In traditional tube dryers, the annular steam buffer tube is fixed to the cylinder, which causes the heat exchange tube to generate large deformation stress when it expands due to heat. This leads to problems such as easy damage to the metal hose and frequent shutdowns due to steam leakage.
An annular steam buffer tube is placed on the outer heat exchange tube, allowing it to move as the outer heat exchange tube extends. A serpentine connecting pipe and welded joint are used instead of a metal hose to eliminate stress, and the overall rigidity is improved by strengthening the structure.
This effectively avoids leakage and frequent downtime of metal hoses, improving the reliability and service life of the equipment.
Smart Images
Figure CN224455346U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steam guiding structure technology, specifically to a tube dryer with a differential steam collecting pipe. Background Technology
[0002] A tube dryer is an indirect heating, continuously operating rotary drying device that achieves deep dehydration of materials by using static steam (or heat transfer oil, hot water) tube bundles in conjunction with a rotating cylinder.
[0003] In traditional shell-and-tube dryers, the annular steam buffer tubes are fixed to the shell, and their position is fixed, while the heat exchange tubes elongate with heat. The connecting pipe between the two then bears significant deformation stress, thus requiring the use of flexible metal hoses. These hoses are prone to damage, leading to frequent steam leaks and shutdowns.
[0004] Currently, there is a lack of a tube dryer with a differential steam collecting tube, in which an annular steam buffer tube is placed on the outer heat exchange tube, and its position moves as the outer heat exchange tube extends, thus eliminating the stress on the connecting tube. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a tube dryer with a differential steam collecting pipe. The annular steam buffer tube is placed on the outer heat exchange tube, and its position moves as the outer heat exchange tube extends. The outer heat exchange tube and the inner heat exchange tube have the same operating conditions, so the amount of extension and contraction is also the same. This eliminates the stress on the connecting pipe, and the connecting pipe is changed to a serpentine connecting pipe. The joint is also changed to a welded structure, which effectively avoids a series of problems caused by metal hoses.
[0006] This utility model achieves its invention objective using the following technical solution:
[0007] A tube dryer with a differential steam collecting pipe, characterized by comprising: a cylindrical body serving as the mounting carrier for related components; an annular steam buffer tube, fixedly connected to a set of assembled mounting bases, no longer welded to the cylindrical body, but directly mounted on the outer ring heat exchange tubes; when the outer ring heat exchange tubes elongate due to temperature rise, they maintain zero relative displacement with the inner and outer ring heat exchange tubes, thereby eliminating the compensation required by the flexible hoses; a set of inner ring heat exchange tubes, evenly distributed circumferentially and radially, respectively fixedly connected to the cylindrical body, each inner ring heat exchange tube being fixedly connected to the annular steam buffer tube via a serpentine connecting pipe; and a set of outer ring heat exchange tubes, evenly distributed circumferentially, respectively fixedly connected to the cylindrical body, each outer ring heat exchange tube being fixedly connected to the annular steam buffer tube via a corresponding serpentine connecting pipe, each assembled mounting base being fixedly connected to a corresponding outer ring heat exchange tube. The inner and outer ring heat exchange tubes are arranged concentrically to increase the heat exchange area. The serpentine connecting pipes replace traditional metal flexible hoses, avoiding leakage and frequent shutdowns.
[0008] As a further limitation of this technical solution, the innermost inner ring heat exchange tubes are fixedly connected to the cylinder by reinforcing tubes. A radial support truss is formed on the innermost side of the inner ring heat exchange tubes to improve the overall bending stiffness of the tube bundle.
[0009] As a further limitation of this technical solution, a set of inner ring heat exchange tubes are respectively fixed with connecting joints, and each joint is respectively fixedly connected to the corresponding serpentine connecting tube. This achieves modular assembly and reduces the difficulty of on-site welding.
[0010] As a further limitation of this technical solution, the connector and the serpentine connecting pipe are fixed by welding. This replaces the traditional hose fitting + clamp structure, eliminating leakage points.
[0011] As a further limitation of this technical solution, a set of valves is installed on the annular steam buffer pipe for discharging non-condensable gases.
[0012] As a further limitation of this technical solution, a set of reinforcing plates are fixedly connected to the outside of the cylinder. These form axial longitudinal stiffeners, improving the overall bending and torsional resistance of the cylinder.
[0013] Compared with related technologies, the tube dryer with a differential steam collecting pipe provided by this utility model has the following beneficial effects:
[0014] The annular steam buffer tube is placed on the outer heat exchange tube, and its position moves as the outer heat exchange tube extends. The outer heat exchange tube and the inner heat exchange tube have the same operating conditions, so the amount of expansion and contraction is also the same. This eliminates the stress on the connecting tube, and the connecting tube is changed to a serpentine connecting tube. The joint is also changed to a welded structure, which effectively avoids a series of problems caused by metal hoses. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model.
[0016] Figure 2 This is a side view of the present invention.
[0017] Figure 3 This is a physical image of the present invention.
[0018] In the picture:
[0019] 1. Shell, 2. Reinforcing plate, 3. Inner ring heat exchange tube, 4. Outer ring heat exchange tube, 5. Reinforcing tube, 6. Joint, 7. Valve, 8. Annular steam buffer tube, 9. Assembled fixing seat, 10. Serpentine connecting pipe. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0021] Example 1: A tube dryer with a differential steam collecting pipe includes: a cylindrical body 1, serving as the mounting carrier for related components; an annular steam buffer tube 8, fixedly connected to a set of assembled mounting bases 9, no longer welded to the cylindrical body 1, but directly mounted on the outer ring heat exchange tube 4; when the outer ring heat exchange tube 4 elongates due to temperature rise, it maintains zero relative displacement with the inner and outer ring heat exchange tubes, thereby eliminating the necessary compensation amount for the flexible tubes; a set of inner ring heat exchange tubes 3, evenly distributed along the circumference and radial direction, respectively fixedly connected to the cylindrical body 1, each of the inner ring heat exchange tubes 3 being fixedly connected to the annular steam buffer tube 8 through a serpentine connecting pipe 10; a set of outer ring heat exchange tubes 4, evenly distributed along the circumference, respectively fixedly connected to the cylindrical body 1, each of the outer ring heat exchange tubes 4 being fixedly connected to the annular steam buffer tube 8 through a corresponding serpentine connecting pipe 10, each of the assembled mounting bases 9 being fixedly connected to a corresponding outer ring heat exchange tube 4. The inner ring heat exchange tubes 3 and the outer ring heat exchange tubes 4 are arranged concentrically to increase the heat exchange area. By using the serpentine connecting pipe 10 instead of the traditional metal hose, leakage and frequent shutdowns can be avoided.
[0022] The innermost heat exchange tubes 3 are fixedly connected to the cylinder 1 by reinforcing tubes 5. A radial support truss is formed on the innermost side of the inner heat exchange tubes 3 to improve the overall bending stiffness of the tube bundle.
[0023] A set of inner ring heat exchange tubes 3 are respectively fixed to connecting joints 6, and each joint 6 is respectively fixed to the corresponding serpentine connecting tube 10. This achieves modular assembly and reduces the difficulty of on-site welding.
[0024] The connector 6 is fixed to the serpentine connecting pipe 10 by welding. This replaces the traditional hose fitting + clamp structure, eliminating leakage points.
[0025] A set of valves 7 are installed on the annular steam buffer pipe 8. These valves are used to discharge non-condensable gases.
[0026] A set of reinforcing plates 2 are fixedly connected to the outside of the cylinder 1. These form axial longitudinal stiffeners, improving the overall bending and torsional resistance of the cylinder.
[0027] 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 shell-and-tube dryer with a non-differential steam collection tube, characterized in that, include: Cylinder (1); An annular steam buffer pipe (8) is fixedly connected to a set of assembled fixing seats (9); A set of inner ring heat exchange tubes (3) are evenly distributed along the circumference and radial direction and are fixedly connected to the cylinder (1). Each inner ring heat exchange tube (3) is fixedly connected to the annular steam buffer tube (8) through a serpentine connecting pipe (10). A set of outer ring heat exchange tubes (4) are evenly distributed along the circumference and are fixedly connected to the cylinder (1). The set of outer ring heat exchange tubes (4) are fixedly connected to the annular steam buffer tube (8) through the corresponding serpentine connecting pipe (10). Each assembled fixing seat (9) is fixedly connected to the corresponding outer ring heat exchange tube (4).
2. The shell-and-tube dryer with a non-differential steam collecting pipe according to claim 1, characterized in that: The innermost inner ring heat exchange tube (3) is fixedly connected to the cylinder (1) through reinforcing tube (5).
3. The shell-and-tube dryer with a non-differential steam collecting pipe according to claim 1, characterized in that: A set of inner ring heat exchange tubes (3) are respectively fixed to connecting joints (6), and each joint (6) is respectively fixed to the corresponding serpentine connecting tube (10).
4. The shell-and-tube dryer with a non-differential steam collecting pipe according to claim 3, characterized in that: The connector (6) is fixed to the serpentine connecting pipe (10) by welding.
5. The shell-and-tube dryer with a differentialless collecting tube according to claim 1, characterized in that: A set of valves (7) is installed on the annular steam buffer pipe (8).
6. The shell-and-tube dryer with a differential-less collecting tube according to claim 1, characterized in that: A set of reinforcing plates (2) are fixedly connected to the outside of the cylinder (1).