A spiral tube preheater

Abstract

The utility model provides a kind of spiral tube preheater, it includes coaxial fixed inner cylinder and the outer cylinder around its outside, and the upper and lower ends of inner cylinder and outer cylinder are respectively fixedly connected with top ring and bottom ring, and the inner layer spiral pipe and the outer layer spiral pipe around the outer layer spiral pipe of the inner layer spiral pipe are further fixedly connected between inner cylinder and outer cylinder, and the inner layer spiral pipe and the outer layer spiral pipe are all located between top ring and bottom ring, and the first feeding pipe of the first discharging pipe that the outer cylinder upper end is passed out and the outer cylinder lower end is passed out is respectively fixedly arranged in the both ends of inner layer spiral pipe, and the second feeding pipe of the second discharging pipe that the outer cylinder lower end is passed out and the outer cylinder upper end is passed out is respectively fixedly arranged in the both ends of outer layer spiral pipe, and the outer cylinder is also fixedly connected with air inlet pipe, and the top ring is also fixedly connected with exhaust pipe.The utility model solves the problem that the high-temperature steam consumption is large in the prior art, which leads to low final efficiency.

Description

Technical Field

[0001] This utility model relates to the field of preheating equipment technology, and in particular to a spiral tube preheater. Background Technology

[0002] In existing technologies, preheaters are generally used to preheat liquid materials, which can reduce energy consumption in subsequent processing. Preheating typically employs a preheater, which includes an outer shell and a spiral tube fixedly installed inside the shell. The two ends of the spiral tube extend from the top and bottom of the shell, respectively, to receive and discharge liquid materials (or gaseous materials). An inlet pipe and an outlet pipe are also fixedly connected to the shell to receive and discharge the preheating medium, which can be high-temperature steam. The preheating medium is introduced into the shell to heat the spiral tube, and the material flows within the spiral tube, thus preheating it. However, in actual operation, the spiral structure of the spiral tube generally has a large space, requiring a large amount of high-temperature steam for filling, resulting in high steam consumption and low overall efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a spiral tube preheater, which solves the problem that the large internal space of the spiral tube structure leads to high high-temperature steam consumption and low final efficiency.

[0004] According to an embodiment of this utility model, a spiral tube preheater includes an inner cylinder and an outer cylinder that are coaxially fixed. A top ring and a bottom ring are fixedly connected between the upper and lower ends of the inner and outer cylinders, respectively. An inner spiral tube and an outer spiral tube that surround the inner spiral tube are also fixedly connected between the inner and outer cylinders, and both the inner and outer spiral tubes are located between the top and bottom rings. A first feed pipe extending from the upper end of the outer cylinder and a first discharge pipe extending from the lower end of the outer cylinder are fixedly provided at both ends of the inner spiral tube, respectively. A second feed pipe extending from the lower end of the outer cylinder and a second discharge pipe extending from the upper end of the outer cylinder are fixedly provided at both ends of the outer spiral tube, respectively. An air inlet pipe is also fixedly connected to the outer cylinder, and an exhaust pipe is fixedly connected to the top ring. Both the air inlet pipe and the exhaust pipe are in spatial communication with the space between the outer and inner cylinders. The outer cylinder is equivalent to the outer shell in existing technology, but the inner cylinder is also provided. The spiral is designed as an inner spiral and an outer spiral that surrounds the inner spiral, forming a double-layer structure. Both are located in the space between the inner and outer cylinders. Firstly, the space required to fill the high-temperature steam is smaller. Secondly, the double-layer structure allows more material to be introduced, thereby improving the overall efficiency. This solves the problem in existing technology where the large internal space of the spiral tube structure leads to high consumption of high-temperature steam and ultimately low efficiency.

[0005] Furthermore, an annular plate is fixedly connected to the inner cylinder, with the outer ring of the annular plate extending toward the outer cylinder and both the inner and outer spiral tubes located below the annular plate.

[0006] Furthermore, the annular plate extends obliquely downwards towards the outer cylinder, and the inner ring is fixedly connected to a first connecting ring, which is fixed to the inner cylinder.

[0007] Furthermore, the annular plate includes a flat annular segment and an arc annular segment located outside the flat annular segment, the arc annular segment extending downward in an arc shape towards the outer cylinder.

[0008] Furthermore, the flat ring section is fixedly connected to a second connecting ring, which is fixedly connected to the inner cylinder.

[0009] Furthermore, the exhaust pipe is positioned close to the inner cylinder.

[0010] Furthermore, the air intake pipe is located at the lower end of the outer cylinder.

[0011] Furthermore, a drain pipe that communicates with the inner and outer cylinders is fixedly connected to the bottom ring.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The inner and outer cylinders are designed to enclose a space for high-temperature steam to enter, thus reducing the overall space required for the high-temperature steam to fill. Furthermore, a double-layered inner and outer spiral tube structure is installed within the enclosed space to increase the amount of material that can be introduced, thereby improving the overall efficiency. This solves the problem in the existing technology where the large internal space of the spiral tube structure leads to a large consumption of high-temperature steam and ultimately low efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0015] Figure 2 for Figure 1 Enlarged view of the local structure at point A in the middle Figure 1 (In one implementation);

[0016] Figure 3 for Figure 1 Enlarged view of the local structure at point A in the middle Figure 2 (One implementation method)

[0017] In the above attached figures:

[0018] Inner cylinder 1, outer cylinder 2, top ring 3, bottom ring 4, annular space 5, inner spiral tube 6, outer spiral tube 7, first feed pipe 8, first discharge pipe 9, second feed pipe 10, second discharge pipe 11, air inlet pipe 12, exhaust pipe 13, annular plate 14, liquid drain pipe 15, first connecting ring 16, flat ring section 17, arc ring section 18, second connecting ring 19. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] In an exemplary implementation, such as Figure 1As shown, this embodiment provides a spiral tube preheater, which includes an inner cylinder 1 and an outer cylinder 2 that are coaxially fixed. A top ring 3 and a bottom ring 4 are fixedly connected between the upper and lower ends of the inner cylinder 1 and the outer cylinder 2, respectively. The top ring 3, bottom ring 4, outer cylinder 2, and inner cylinder 1 together form an annular space 5. An inner spiral tube 6 and an outer spiral tube 7 are also fixedly connected between the inner cylinder 1 and the outer cylinder 2, and both the inner spiral tube 6 and the outer spiral tube 7 are located between the top ring 3 and the bottom ring 4. That is, the inner spiral tube 6 and the outer spiral tube 7 are located within the annular space 5. The two ends of the inner spiral tube 6 are... The outer cylinder 2 is fixedly equipped with a first feed pipe 8 extending from the upper end and a first discharge pipe 9 extending from the lower end. The outer spiral tube 7 has a second feed pipe 10 extending from the lower end and a second discharge pipe 11 extending from the upper end, respectively, fixedly installed at both ends. An air inlet pipe 12 is also fixedly connected to the outer cylinder 2, and an exhaust pipe 13 is fixedly connected to the top ring 3. Both the air inlet pipe 12 and the exhaust pipe 13 communicate with the space between the outer cylinder 2 and the inner cylinder 1. The air inlet pipe 12 introduces a preheating medium (i.e., high-temperature steam), while the first feed pipe 8 and the second feed pipe 10 can respectively introduce materials (liquid or gaseous materials). After the materials enter... The material flows through the inner spiral tube 6 and outer spiral tube 7 within the annular space 5. High-temperature steam is present in the annular space 5 during this process, thus achieving preheating. During this process, the material flows in opposite directions in the inner spiral tube 6 and outer spiral tube 7, and they can also be arranged adjacent to each other, allowing them to work together for better preheating. (More specifically, the air inlet pipe 12 can be located at the bottom of the outer cylinder 2, so that high-temperature steam enters from the bottom, and the material in the first feed pipe 8 also enters from the bottom. Thus, the material in the first feed pipe 8 is first heated by the high-temperature steam and then spirals upwards in the inner layer.) The material enters from the top through the second feed pipe 10 and moves downwards in a spiral motion in the outer layer. There is also indirect heat exchange between the inner and outer layers. That is, the higher temperature material in the inner layer can transfer heat to the outer spiral pipe through the inner spiral pipe 6, which works in conjunction with the high temperature steam to achieve a better preheating effect. Preheating can be carried out with less high temperature steam consumption. That is, the overall space required for high temperature steam in this solution is smaller. Secondly, the double-layer structure can allow more material to be introduced, thereby improving the overall efficiency. This solves the problem that the large internal space of the spiral pipe structure in the prior art leads to a large consumption of high temperature steam and a low final efficiency.

[0022] like Figure 1-3As shown, an annular plate 14 is also fixedly connected to the inner cylinder 1. The outer ring of the annular plate 14 extends toward the outer cylinder 2, and the inner spiral tube 6 and the outer spiral tube 7 are both located below the annular plate 14. The exhaust pipe 13 is used to discharge excess high-temperature steam (by installing a pressure relief valve on it) to prevent the gas pressure in the annular space 5 from being too high. The exhaust pipe 13 is located directly above the annular plate 14. The outer ring of the annular plate 14 is separated from the outer cylinder 2. The high-temperature steam needs to pass over the annular plate 14 to enter the exhaust pipe 13, thus preventing the high-temperature steam below the annular plate 14 from rushing out directly during exhaust.

[0023] like Figure 1 , 2 As shown, in one embodiment, the annular plate 14 extends obliquely downward toward the outer cylinder 2, and the inner ring is fixedly connected to the first connecting ring 16. The first connecting ring 16 is fixed to the inner cylinder 1. During or after the preheating process, the high-temperature steam may condense into water, which can flow smoothly downward through the inclined annular plate 14 to return to the bottom of the annular space 5.

[0024] like Figure 3 As shown, in another embodiment, the annular plate 14 includes a flat annular segment 17 and an arc annular segment 18 located outside the flat annular segment 17. The arc annular segment 18 extends downward in an arc shape toward the outer cylinder 2. The arc annular segment 18 can also facilitate the downward flow of condensed water. Similarly, the flat annular segment 17 is fixedly connected to a second connecting ring 19, which is fixedly connected to the inner cylinder 1.

[0025] like Figure 1-3 As shown, a drain pipe 15, which communicates with the inner cylinder 1 and the outer cylinder 2, is also fixedly connected to the bottom ring 4. The drain pipe 15 drains the water from the annular space 5 after the preheating is completed.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A spiral tube preheater, characterized in that, The device includes an inner cylinder with its center line fixed relative to the outer cylinder and an outer cylinder surrounding it. A top ring and a bottom ring are fixedly connected between the upper and lower ends of the inner and outer cylinders, respectively. An inner spiral tube and an outer spiral tube surrounding the inner spiral tube are also fixedly connected between the inner and outer cylinders, with both the inner and outer spiral tubes located between the top and bottom rings. A first feed pipe extending from the upper end of the outer cylinder and a first discharge pipe extending from the lower end of the outer cylinder are fixedly installed at both ends of the inner spiral tube, respectively. A second feed pipe extending from the lower end of the outer cylinder and a second discharge pipe extending from the upper end of the outer cylinder are fixedly installed at both ends of the outer spiral tube, respectively. An air inlet pipe is also fixedly connected to the outer cylinder, and an exhaust pipe is fixedly connected to the top ring. Both the air inlet pipe and the exhaust pipe are in communication with the space between the outer and inner cylinders.

2. The spiral tube preheater as described in claim 1, characterized in that, An annular plate is also fixedly connected to the inner cylinder. The outer ring of the annular plate extends toward the outer cylinder, and both the inner and outer spiral tubes are located below the annular plate.

3. The spiral tube preheater as described in claim 2, characterized in that, The annular plate extends obliquely downwards towards the outer cylinder, and the inner ring is fixedly connected to the first connecting ring, which is fixed to the inner cylinder.

4. The spiral tube preheater as described in claim 2, characterized in that, The annular plate includes a flat annular section and an arc annular section located outside the flat annular section. The arc annular section extends downward in an arc shape towards the outer cylinder.

5. The spiral tube preheater as described in claim 4, characterized in that, The flat ring section is fixedly connected to a second connecting ring, which is fixedly connected to the inner cylinder.

6. The spiral tube preheater according to any one of claims 1-5, characterized in that, The exhaust pipe is located close to the inner cylinder.

7. The spiral tube preheater as described in claim 6, characterized in that, The air intake pipe is located at the lower end of the outer cylinder.

8. The spiral tube preheater as described in claim 7, characterized in that, A drain pipe that connects the inner and outer cylinders is also fixedly connected to the bottom ring.

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