Safe gas preheating pipeline

Abstract

The utility model belongs to the field of gas boilers, and relates to a safety type gas preheating pipeline which can detect the gas leakage condition and reduce the danger coefficient. According to the technical scheme, the device comprises a fuel gas pipeline, a flue gas pipeline, a first partition plate, a second partition plate, a fuel gas detection sensor and a heat exchanger. Wherein the fuel gas pipeline is communicated with a gas source, and the fuel gas pipeline is configured to convey fuel gas. The flue gas pipeline and the fuel gas pipeline are arranged in parallel, the flue gas pipeline communicates with the boiler, the flue gas pipeline is configured to convey flue gas, and the flue gas temperature is higher than the fuel gas temperature. The first partition plate is fixed between the gas pipeline and the flue gas pipeline. The second partition plate is fixed between the gas pipeline and the flue gas pipeline, and a closed space is formed between the second partition plate and the first partition plate. The fuel gas detection sensor is arranged in the space between the first partition plate and the second partition plate. The heat exchanger is arranged on the first partition plate and / or the second partition plate, and the heat exchanger is configured to be a medium for transmitting heat from flue gas to fuel gas.

Description

Technical Field

[0001] The utility model belongs to the field of gas boilers and relates to a safe gas preheating pipeline. Background Art

[0002] At present, in order to improve energy utilization efficiency and increase the internal temperature of the boiler, the waste heat of the flue gas after combustion is usually collected and the gas is preheated.

[0003] like Figure 1 As shown, the conventional way to preheat the gas is to set the gas duct 1 and the flue gas duct 2 side by side, and set a partition plate 8 between the gas duct and the flue gas duct. The partition plate 8 can also be a heat exchange plate, so that the waste heat of the flue gas can be effectively utilized.

[0004] During use, it was found that the partition plate was at risk of damage, causing gas to escape into the flue gas duct, which was specifically manifested in an increase in the gas content in the flue gas duct.

[0005] Although gas leakage risks can be effectively detected by monitoring the gas content in the flue gas duct, when gas leaks into the flue gas duct, the gas content increases in the narrow space, and this happens after the combustion tail flame, posing a high risk of gas explosion. Utility Model Content

[0006] In order to overcome the defects in the above-mentioned related technologies, the present invention proposes a safe gas preheating pipeline, which can detect gas leakage and reduce the risk factor.

[0007] In order to achieve the above technical objectives, the present invention provides a safe gas preheating pipeline. The safe gas preheating pipeline includes: a gas pipeline, a flue gas pipeline, a first partition plate, a second partition plate, a gas detection sensor and a heat exchanger. The gas pipeline is connected to a gas source and is configured to transport gas. The flue gas pipeline is arranged in parallel with the gas pipeline and is connected to a boiler. The flue gas pipeline is configured to transport flue gas, and the flue gas temperature is greater than the gas temperature. The first partition plate is fixed between the gas pipeline and the flue gas pipeline. The second partition plate is fixed between the gas pipeline and the flue gas pipeline, and a closed space is formed between the second partition plate and the first partition plate. The gas detection sensor is arranged in the space between the first partition plate and the second partition plate. The heat exchanger is arranged on the first partition plate and / or the second partition plate, and the heat exchanger is configured to be a medium for transferring heat from the flue gas to the gas.

[0008] Preferably, at least one first pipeline is provided inside the first partition plate, at least one second pipeline is provided inside the second partition plate, and the first pipeline is connected to the second pipeline. The heat exchanger includes the first pipeline and the second pipeline.

[0009] Preferably, the heat exchanger further comprises a heat absorption pipeline and a heat release pipeline. A plurality of the heat absorption pipelines are disposed within the flue gas duct. A plurality of the heat release pipelines are disposed within the gas duct, with at least one of the plurality of heat release pipelines passing through the first and second partition plates and then communicating with at least one of the plurality of heat absorption pipelines.

[0010] Preferably, the pipeline passing through the first partition plate and the second partition plate is sealed with the corresponding first partition plate or second partition plate.

[0011] Preferably, a plurality of isolation plates are provided in the enclosed space between the first partition plate and the second partition plate, and the plurality of isolation plates divide the enclosed space into a plurality of enclosed cavities, each of which is provided with a gas detection sensor.

[0012] Preferably, a smoke detection sensor is provided in the enclosed space.

[0013] Preferably, a smoke detection sensor is provided in each sealed cavity.

[0014] The beneficial effects of the present utility model are:

[0015] The utility model adopts a first partition plate and a second partition plate, and a gas detection sensor is arranged between the first partition plate and the second partition plate. The gas leakage of the first partition plate or the second partition plate can be obtained before the gas leaks into the flue gas pipe, and maintenance can be carried out in advance to avoid gas explosion.

[0016] Other effects of the present invention are described in detail in conjunction with examples in the specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a structural diagram of the utility model in the prior art;

[0019] Figure 2This is the first structural diagram of the utility model;

[0020] Figure 3 This is the second structural diagram of the utility model;

[0021] Figure 4 This is the third structural diagram of the utility model;

[0022] Figure 5 This is the fourth structural diagram of the utility model;

[0023] Figure 6 This is a top view of the second structure or the fourth structure of the utility model in a gas pipeline. DETAILED DESCRIPTION

[0024] To make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more. Example

[0027] like Figure 2As shown, this embodiment provides a safe gas preheating pipeline. The safe gas preheating pipeline includes: a gas pipeline 1, a flue gas pipeline 2, a first partition plate 3, a second partition plate 4, a gas detection sensor 5, and a heat exchanger 6. The gas pipeline 1 is connected to a gas source and is configured to transport gas. The flue gas pipeline 2 is arranged in parallel with the gas pipeline 1 and is connected to a boiler. The flue gas pipeline 2 is configured to transport flue gas, and the flue gas temperature is greater than the gas temperature. The first partition plate 3 is fixed between the gas pipeline 1 and the flue gas pipeline 2. The second partition plate 4 is fixed between the gas pipeline 1 and the flue gas pipeline 2, and a sealed space 7 is formed between the second partition plate 4 and the first partition plate 3. The gas detection sensor 5 is disposed in the space between the first partition plate 3 and the second partition plate 4. The heat exchanger 6 is disposed on the first partition plate 3 and / or the second partition plate 4 and is configured to serve as a medium for transferring heat from the flue gas to the gas.

[0028] At least one first pipeline 61 is disposed inside the first partition plate 3 , and at least one second pipeline 62 is disposed inside the second partition plate 4 , and the first pipeline 61 is in communication with the second pipeline 62 . The heat exchanger 6 includes the first pipeline 61 and the second pipeline 62 .

[0029] In this embodiment, the first partition plate 3 is close to the gas pipe 1, and the second partition plate 4 is close to the flue gas pipe 2. The first partition plate 3 and the second partition plate 4 are sealed with the corresponding gas pipe 1 or flue gas pipe 2, and an enclosed space 7 is formed between the first partition plate 3 and the second partition plate 4. The distance between the first partition plate 3 and the second partition plate 4 is less than 5 cm.

[0030] A gas detection sensor 5 is provided between the first partition plate 3 and the second partition plate 4. The gas detection sensor 5 can be electrically connected to the processor or the alarm circuit. When the gas detection sensor 5 detects the presence of gas in the confined space 7, it can be determined that the gas in the gas pipeline 1 is escaping to the flue gas pipeline 2, and timely maintenance is performed.

[0031] In some examples, the gas pipeline 1 may be a coal gas pipeline, and the gas detection sensor 5 may be a coal gas detection sensor.

[0032] In this embodiment, a first pipeline 61 may be provided in the first partition plate 3, and a second pipeline 62 may be provided in the second partition plate 4. The safety gas preheating pipeline may further include a water storage tank and a circulation pump, wherein the water storage tank, the circulation pump, the first pipeline 61, and the second pipeline 62 are sequentially connected to form a closed system. Example

[0033] like Figure 3 and Figure 6 As shown, this embodiment provides a safe gas preheating pipeline. The safe gas preheating pipeline includes: a gas pipeline 1, a flue gas pipeline 2, a first partition plate 3, a second partition plate 4, a gas detection sensor 5, and a heat exchanger 6. The gas pipeline 1 is connected to a gas source and is configured to transport gas. The flue gas pipeline 2 is arranged in parallel with the gas pipeline 1 and is connected to a boiler. The flue gas pipeline 2 is configured to transport flue gas, and the flue gas temperature is greater than the gas temperature. The first partition plate 3 is fixed between the gas pipeline 1 and the flue gas pipeline 2. The second partition plate 4 is fixed between the gas pipeline 1 and the flue gas pipeline 2, and a sealed space 7 is formed between the second partition plate 4 and the first partition plate 3. The gas detection sensor 5 is disposed in the space between the first partition plate 3 and the second partition plate 4. The heat exchanger 6 is disposed on the first partition plate 3 and / or the second partition plate 4 and is configured to serve as a medium for transferring heat from the flue gas to the gas.

[0034] The heat exchanger 6 further includes a heat absorption pipeline 63 and a heat release pipeline 64. Multiple heat absorption pipelines 63 are disposed within the flue gas duct 2. Multiple heat release pipelines 64 are disposed within the gas duct 1. At least one of the multiple heat release pipelines 64 passes through the first and second partition plates 3 and 4 and is then connected to at least one of the multiple heat absorption pipelines 63.

[0035] In this embodiment, the first partition plate 3 is close to the gas pipe 1, and the second partition plate 4 is close to the flue gas pipe 2. The first partition plate 3 and the second partition plate 4 are sealed with the corresponding gas pipe 1 or flue gas pipe 2, and an enclosed space 7 is formed between the first partition plate 3 and the second partition plate 4. The distance between the first partition plate 3 and the second partition plate 4 is less than 5 cm.

[0036] A gas detection sensor 5 is provided between the first partition plate 3 and the second partition plate 4. The gas detection sensor 5 can be electrically connected to the processor or the alarm circuit. When the gas detection sensor 5 detects the presence of gas in the confined space 7, it can be determined that the gas in the gas pipeline 1 is escaping to the flue gas pipeline 2, and timely maintenance is performed.

[0037] In some examples, the gas pipeline 1 may be a coal gas pipeline, and the gas detection sensor 5 may be a coal gas detection sensor.

[0038] In this embodiment, a plurality of heat absorption pipes 63 are arranged in parallel and in close contact with the first partition plate 3, and a plurality of heat release pipes 64 are arranged in parallel and in close contact with the second partition plate 4. The plurality of heat absorption pipes 63 can be connected to the plurality of heat release pipes 64 in sequence, for example, the first heat absorption pipe 63 is connected to the first heat release pipe 64, and the first heat release pipe 64 is also connected to the second heat absorption pipe 63, and so on.

[0039] This embodiment may further include a water storage tank and a circulation pump. The water storage tank, the circulation pump, a plurality of heat absorption pipes 63 and a plurality of heat release pipes 64 are connected to form a closed system.

[0040] The heat exchanger 6 of this embodiment can improve the heat exchange efficiency and avoid the problem of low heat exchange efficiency caused by adding partitions.

[0041] The pipeline passing through the first partition plate 3 and the second partition plate 4 is sealed with the corresponding first partition plate 3 or second partition plate 4 . Example

[0042] like Figure 4 and Figure 5 As shown, based on Example 1 or 2, a plurality of partition plates are provided in the enclosed space 7 between the first partition plate 3 and the second partition plate 4 of the safety gas preheating pipeline of this embodiment. The plurality of partition plates divide the enclosed space 7 into a plurality of enclosed cavities 71. A gas detection sensor 5 is provided in each enclosed cavity 71.

[0043] It can be understood that multiple gas detection sensors 5 are electrically connected to the processor or alarm circuit, that is, when the corresponding gas detection sensor 5 detects gas, the processor or alarm circuit can distinguish the number of the gas detection sensor 5 that uploaded the signal, and accordingly obtain the gas leakage situation of the first partition plate 3 or the second partition plate 4 where the corresponding closed cavity 71 is located.

[0044] This embodiment uses multiple isolation plates to increase the speed of detecting the gas leak location and improve maintenance efficiency. Example

[0045] On the basis of embodiment 1 or 2, the safety gas preheating pipeline of this embodiment further includes a smoke detection sensor. A smoke detection sensor is provided in the enclosed space 7.

[0046] The smoke detection sensor should be electrically connected to the corresponding signal processing circuit or processor. The smoke detection sensor can detect smoke leakage from the smoke pipe 2. This can indicate the presence of gas or smoke leakage without affecting the heat exchange between the gas pipe 1 and the smoke pipe 2, and can also prevent gas or smoke from mixing into the opposite air duct. Example

[0047] On the basis of Example 3, the safety gas preheating pipeline described in this embodiment further includes a smoke detection sensor. A smoke detection sensor is provided in each closed cavity 71 .

[0048] The smoke detection sensor should be electrically connected to the corresponding signal processing circuit or processor. The smoke detection sensor can detect smoke leakage from the smoke pipe 2. This can indicate the presence of gas or smoke leakage without affecting the heat exchange between the gas pipe 1 and the smoke pipe 2, and can also prevent gas or smoke from mixing into the opposite air duct.

[0049] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0050] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A safe gas preheating pipeline, characterized in that: include: a gas pipeline, the gas pipeline being in communication with a gas source and configured to transport gas; a flue gas duct, the flue gas duct being arranged in parallel with the gas duct and being in communication with the boiler, the flue gas duct being configured to transport flue gas, and the flue gas having a temperature greater than that of the gas; a first partition plate, the first partition plate being fixed between the gas pipe and the flue gas pipe; a second partition plate, the second partition plate being fixed between the gas pipe and the flue gas pipe, and forming a closed space between the second partition plate and the first partition plate; a gas detection sensor disposed in a space between the first partition plate and the second partition plate; A heat exchanger is provided on the first partition plate and / or the second partition plate, and is configured as a medium for transferring heat from the flue gas to the fuel gas.

2. The safe gas preheating pipeline according to claim 1, characterized in that: At least one first pipeline is provided inside the first partition plate, at least one second pipeline is provided inside the second partition plate, and the first pipeline is communicated with the second pipeline; The heat exchanger includes the first pipe and the second pipe.

3. The safe gas preheating pipeline according to claim 1, characterized in that: The heat exchanger further comprises: a heat absorption pipeline, wherein a plurality of the heat absorption pipelines are arranged in the flue gas duct; A heat release pipeline, wherein a plurality of the heat release pipelines are arranged in the gas pipeline, and at least one of the plurality of heat release pipelines passes through the first partition plate and the second partition plate, and is also connected to at least one of the plurality of heat absorption pipelines.

4. The safety gas preheating pipeline according to claim 3 is characterized in that: The pipeline passing through the first partition plate and the second partition plate is sealed with the corresponding first partition plate or second partition plate.

5. The safe gas preheating pipeline according to any one of claims 2 to 4, characterized in that: A plurality of isolation plates are arranged in the enclosed space between the first partition plate and the second partition plate, and the plurality of isolation plates divide the enclosed space into a plurality of enclosed cavities; A gas detection sensor is provided in each sealed cavity.

6. The safety gas preheating pipeline according to claim 5, characterized in that: A smoke detection sensor is provided in the enclosed space; Alternatively, a smoke detection sensor is provided in each sealed cavity.

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