Sealing structure for separating flue gas and coal gas of coal gas heat exchanger

Abstract

The utility model belongs to the technical field of gas heat exchangers, and particularly relates to a sealing structure for a gas heat exchanger to partition smoke and gas. The heat exchanger comprises an upper partition plate and a lower partition plate, the upper partition plate and the lower partition plate are arranged at intervals, and a plurality of heat pipe holes and limiting pin holes are correspondingly formed in the upper partition plate and the lower partition plate; the limiting pins are arranged between the upper partition plate and the lower partition plate, bosses are arranged at the two ends of each limiting pin, the bosses are matched with the limiting pin holes, and the limiting pins are welded to the outer side face of the upper partition plate and the outer side face of the lower partition plate respectively; the heat pipes penetrate through the heat pipe holes, and the heat pipes are welded to the outer side faces of the upper partition plate and the lower partition plate correspondingly; and the packing layer is arranged between the upper partition plate and the lower partition plate. The gas heat exchanger is used for solving the technical problems that the sealing position of the gas heat exchanger in the prior art fails, and the sealing safety is difficult to guarantee.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas heat exchangers, specifically relating to a sealing structure for isolating flue gas and coal gas in a gas heat exchanger. Background Technology

[0002] During the use of gas heat exchangers, the seals may fail over time, leading to gas leaks. Since gas is a flammable and explosive gas, this poses a significant safety hazard.

[0003] Analysis of the seal failures revealed two main causes: one was electrochemical corrosion and mechanical vibration cracking at the weld, leading to weld leakage; the other was the use of a sealing nut type, which could also loosen and leak due to long-term vibration.

[0004] Currently, property damage caused by the aforementioned seal failures in gas heat exchangers is not uncommon. Therefore, improving the sealing safety of gas heat exchangers has become an urgent problem to be solved in this field. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a sealing structure for isolating flue gas and coal gas in a gas heat exchanger, so as to solve the technical problem that the sealing of the gas heat exchanger fails and it is difficult to guarantee the sealing safety in the prior art.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A sealing structure for isolating flue gas and coal gas in a gas heat exchanger, comprising:

[0007] An upper partition and a lower partition are provided, the upper partition and the lower partition are spaced apart, and each of the upper partition and the lower partition is provided with a number of heat pipe holes and limiting pin holes respectively;

[0008] A plurality of limiting pins are provided between the upper partition and the lower partition. Each limiting pin has a boss at both ends, which is adapted to the limiting pin hole. The limiting pins are welded to the outer surfaces of the upper partition and the lower partition respectively.

[0009] A plurality of heat pipes, the plurality of heat pipes passing through the heat pipe holes, the heat pipes being welded to the outer surfaces of the upper partition and the lower partition respectively;

[0010] A packing layer is disposed between the upper partition and the lower partition.

[0011] This utility model combines welding sealing and packing sealing. First, the packing layer is placed between the upper and lower partitions. The packing layer can absorb vibration energy and will not shrink in the internal cavity. It does not come into large-area contact with air, is not prone to aging, and can maintain sealing performance for a longer time. Second, double-sided sealing is provided by welding the upper and lower partitions on both sides.

[0012] Furthermore, the material of the filler layer is a non-shrink grout.

[0013] The beneficial effects of this step are that the grout will not shrink and can fill the space between the upper and lower partitions.

[0014] Furthermore, the heat pipe is provided with a welding ring at the position corresponding to the upper partition and the lower partition, and the heat pipe hole is adapted to the welding ring.

[0015] The benefits of this step are that welding the ring to the upper and lower partitions avoids the adverse effects of high welding temperatures on the heat pipe itself.

[0016] Furthermore, the boss and the top edge of the welding ring are provided with a welding bevel.

[0017] The benefits of this step are: the weld bevel ensures the amount of flux filling and guarantees weld strength.

[0018] Furthermore, the welding ring is interference-fitted with the heat pipe hole, and the boss is interference-fitted with the limiting pin hole.

[0019] The benefits of this step include: preventing vibration between the welding ring and the heat pipe hole, and between the boss and the locating pin hole, which could lead to weld cracking.

[0020] Furthermore, the weld surfaces of the welding ring and the boss are provided with an anti-corrosion coating.

[0021] The beneficial effects of this step are: the anti-corrosion coating can prevent electrochemical corrosion of the weld.

[0022] The beneficial effects of this utility model are:

[0023] 1. This application forms a stable partition structure by welding the upper partition, the lower partition, and the limiting pin. Then, the heat pipe is passed through the upper partition and the lower partition and welded to them. Finally, a filler layer is added, combining double-sided welding seal and filler seal to improve the sealing effect.

[0024] 2. The impact of vibration on the sealing structure is reduced by welding bevels and interference fits, and the surface anti-corrosion coating is used to prevent electrochemical corrosion of the sealing structure, thereby further improving the sealing safety. Attached Figure Description

[0025] 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. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a partial cross-sectional schematic diagram of a sealing structure for isolating flue gas and coal gas in a gas heat exchanger, which is provided by this utility model.

[0027] Figure label:

[0028] 1-Upper partition; 2-Lower partition; 3-Limit pin; 4-Heat pipe; 5-Filling layer;

[0029] 31 - Boss; 41 - Welding ring. Detailed Implementation

[0030] 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.

[0031] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "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 based on the orientation or positional relationship shown in the accompanying drawings, 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.

[0033] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] Example

[0037] like Figure 1 As shown, the present invention provides a sealing structure for isolating flue gas and coal gas in a gas heat exchanger, comprising:

[0038] Upper partition 1 and lower partition 2 are provided at intervals, and both upper partition 1 and lower partition 2 are provided with a number of heat pipe holes and limiting pin holes.

[0039] A plurality of limiting pins 3 are provided between the upper partition 1 and the lower partition 2. Both ends of each limiting pin 3 are provided with a boss 31, which is adapted to the limiting pin hole. The limiting pins 3 are welded to the outer side of the upper partition 1 and the lower partition 2 respectively. The limiting pins 3 can ensure that the upper partition 1 and the lower partition 2 maintain the same interval distance and enhance the structural strength after welding.

[0040] A plurality of heat pipes 4 pass through the heat pipe holes, and the heat pipes are respectively welded to the outer surfaces of the upper partition plate 1 and the lower partition plate 2;

[0041] The packing layer 5 is disposed between the upper partition 1 and the lower partition 2.

[0042] This utility model combines welding sealing and packing sealing. First, the packing layer 5 is placed between the upper partition 1 and the lower partition 2. The packing layer 5 can absorb vibration energy and will not shrink in the internal cavity. It does not come into large-area contact with air, is not prone to aging, and can maintain sealing performance for a longer time. Second, double-sided sealing is provided by welding the upper partition 1 and the lower partition 2 on both sides.

[0043] Based on the above technical solution, the material of the filler layer 5 is non-shrink grout, generally a high-strength non-shrink grout, usually the CGM-6 high-strength non-shrink grout from Chengdu Zefeng Hanyun New Material Technology Co., Ltd.

[0044] The grout does not shrink and can fill the space between the upper partition 1 and the lower partition 2. The grout fills the gaps and seals the space, and also absorbs energy and reduces vibration.

[0045] Based on the above technical solution, the heat pipe 4 is further provided with a welding ring 41 at the position corresponding to the upper partition 1 and the lower partition 2, and the heat pipe hole is adapted to the welding ring 41.

[0046] The heat pipe 4 has a thin wall, making it susceptible to adverse effects during the welding process. To address this, a welding ring 41 is added to the heat pipe 4 during its production. The welding ring 41 is welded to the upper partition 1 and the lower partition 2, which helps to prevent the high temperature of the welding process from negatively impacting the heat pipe 4 itself.

[0047] Based on the above technical solution, the top edge of the boss 31 and the welding ring 41 is provided with a welding bevel.

[0048] Generally, the weld surface needs to be ground to remove slag, which will wear down the weld thickness. However, the welding bevel can ensure the amount of flux filling and ensure the welding strength.

[0049] Based on the above technical solution, the welding ring 41 is interference-fitted with the heat pipe hole, and the boss 31 is interference-fitted with the limiting pin hole.

[0050] The interference fit method can prevent vibration between the welding ring 41 and the heat pipe hole, and between the boss 31 and the limit pin hole, which could lead to weld cracking.

[0051] Based on the above technical solution, the weld surfaces of the welding ring 41 and the boss 31 are provided with an anti-corrosion coating.

[0052] The anti-corrosion coating can prevent electrochemical corrosion of the weld.

[0053] 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 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 therein. 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.

Claims

1. A sealing structure for isolating flue gas and coal gas in a gas heat exchanger, characterized in that, include: An upper partition and a lower partition are provided, the upper partition and the lower partition are spaced apart, and each of the upper partition and the lower partition is provided with a number of heat pipe holes and limiting pin holes respectively; A plurality of limiting pins are provided between the upper partition and the lower partition. Each limiting pin has a boss at both ends, which is adapted to the limiting pin hole. The limiting pins are welded to the outer surfaces of the upper partition and the lower partition respectively. A plurality of heat pipes, the plurality of heat pipes passing through the heat pipe holes, the heat pipes being welded to the outer surfaces of the upper partition and the lower partition respectively; A packing layer is disposed between the upper partition and the lower partition.

2. The sealing structure for isolating flue gas and coal gas in a gas heat exchanger according to claim 1, characterized in that, The filler layer is made of non-shrink grout.

3. The sealing structure for isolating flue gas and coal gas in a gas heat exchanger according to claim 1, characterized in that, The heat pipe is also provided with a welding ring at the position corresponding to the upper partition and the lower partition, and the heat pipe hole is adapted to the welding ring.

4. The sealing structure for isolating flue gas and coal gas in a gas heat exchanger according to claim 3, characterized in that, The boss and the top edge of the welding ring are provided with a welding bevel.

5. The sealing structure for isolating flue gas and coal gas in a gas heat exchanger according to claim 4, characterized in that, The welding ring is interference-fitted with the heat pipe hole, and the boss is interference-fitted with the limiting pin hole.

6. The sealing structure for isolating flue gas and coal gas in a gas heat exchanger according to claim 5, characterized in that, The weld surfaces of the welding ring and the boss are provided with an anti-corrosion coating.

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