Anti-backfire gas combustion device

Abstract

The utility model discloses an anti-backfire gas combustion device, the anti-backfire gas combustion device comprises a combustion body, a nozzle and a sealing piece, the combustion body comprises a main chamber and a premixing chamber, the premixing chamber is communicated with the main chamber, the premixing chamber is suitable for introducing air, the nozzle is arranged in the premixing chamber and is provided with a spout, and the sealing piece is arranged on the nozzle. The nozzle is used for spraying marsh gas into the premixing chamber so that marsh gas and air can be premixed in the premixing chamber to form mixed gas, the mixed gas is combusted in the main chamber to form flames, the first end of the sealing part is pivotally connected with the nozzle so that the sealing part can rotate between a first position and a second position, and at the first position, the second position is opposite to the first position; in the first position, the closure closes the spout to prevent flame from flowing back into the nozzle, and in the second position, the closure is away from the spout to facilitate injection of biogas into the pre-mixing chamber. The anti-backfire gas combustion device provided by the utility model has the advantage of good safety.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a backfire-proof gas combustion device. Background Art

[0002] Anaerobic sewage treatment systems will produce a large amount of gas, mainly biogas, the main component of which is methane. Its characteristics are similar to those of natural gas. Methane, the main component of biogas, is an ideal gas fuel that will burn when mixed with an appropriate amount of air. Compared with other fuel gases, biogas has better anti-explosion performance and is a good clean fuel. When biogas burns in the biogas combustion body, the use of flame arresters cannot completely prevent backfire, and the safety is poor. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a flashback-proof gas combustion device, which has the advantage of good safety.

[0004] According to the anti-flashback gas combustion device of the embodiment of the utility model, the anti-flashback gas combustion device includes a combustion body, a nozzle and a closure member, the combustion body includes a main chamber and a premixing chamber, the premixing chamber is connected to the main chamber, the premixing chamber is suitable for introducing air, the nozzle is arranged in the premixing chamber and has a nozzle, the nozzle is used to spray biogas into the premixing chamber so that the biogas and the air are premixed in the premixing chamber to form a mixed gas, the mixed gas burns in the main chamber to form a flame, the first end of the closure member is pivotally connected to the nozzle so that the closure member can rotate between a first position and a second position, in the first position, the closure member closes the nozzle to prevent the flame from flowing back into the nozzle, and in the second position, the closure member is away from the nozzle to facilitate the biogas to be sprayed into the premixing chamber.

[0005] The anti-flashback gas combustion device according to the embodiment of the utility model has the advantage of good safety. The application can prevent the flame in the gas combustion device from returning to the pipeline between the premixing chamber and the flame arrester, thereby preventing the occurrence of deflagration.

[0006] In some embodiments, an end surface of the nozzle opening forms an angle with an extension direction of the nozzle, and in the first position, the sealing member fits against the nozzle opening of the nozzle to seal the nozzle opening.

[0007] In some embodiments, the angle is 30° to 60°.

[0008] In some embodiments, the closure member is a baffle, and two side surfaces of the baffle that are oppositely arranged in the thickness direction are arranged parallel to the end surface of the nozzle.

[0009] In some embodiments, the anti-flashback gas combustion device further comprises a counterweight, one end of the baffle is pivotally connected to the nozzle, and the counterweight is disposed at the other end of the closure.

[0010] In some embodiments, the anti-flashback gas combustion device also includes a magnetic attraction component, which includes a first magnetic attraction block and a second magnetic attraction block that are magnetically attracted to each other. The first magnetic attraction block is arranged on the side of the closing component facing the nozzle, and the second magnetic attraction block is arranged on the end face of the nozzle facing the closing component.

[0011] In some embodiments, there are a plurality of nozzles, and the plurality of nozzles are arranged at intervals; there are a plurality of baffles, and the plurality of baffles correspond one-to-one to the plurality of nozzles.

[0012] In some embodiments, the anti-backfire gas combustion device also includes an air supply pipeline, which includes a main pipeline and a branch pipeline, one end of the branch pipeline is connected to the main pipeline, and the other end of the branch pipeline is suitable for being connected to a torch, one end of the main pipeline enters the premixing chamber, and the nozzle is arranged at one end of the main pipeline extending into the premixing chamber.

[0013] In some embodiments, the anti-backfire gas combustion device also includes an automatic control valve and a flame arrester. The automatic control valve is arranged on the main pipeline to control the flow of biogas in the main pipeline. The flame arrester is arranged on the main pipeline and is located between the automatic control valve and the nozzle.

[0014] In some embodiments, the anti-backfire gas combustion device also includes an igniter and a thermometer. The thermometer is arranged on the branch pipe to detect the temperature of the torch. The thermometer is electrically connected to the igniter. The igniter is arranged on the branch pipe to ignite when the temperature of the torch detected by the thermometer is lower than a preset temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a gas combustion device for preventing backfire according to an embodiment of the utility model.

[0016] Figure 2 yes Figure 1 A partial enlarged schematic diagram of .

[0017] Figure numerals: 1. main chamber; 2. premixing chamber; 3. main pipeline; 4. branch pipeline; 5. closure; 6. nozzle; 7. automatic control valve; 8. flame arrester; 9. igniter; 10. thermometer. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0019] According to the anti-flashback gas combustion device of the utility model, Figure 1 and Figure 2 As shown, the anti-flashback gas combustion device includes a combustion body, a nozzle 6 and a closure 5. The combustion body includes a main chamber 1 and a premixing chamber 2. The premixing chamber 2 is connected to the main chamber 1. Air is suitable for entering the premixing chamber 2. The nozzle 6 is arranged in the premixing chamber 2 and has a nozzle. The nozzle is used to spray biogas into the premixing chamber 2 so that the biogas and air are premixed in the premixing chamber 2 to form a mixed gas. The mixed gas burns in the main chamber 1 to form a flame. The first end of the closure 5 is pivotally connected to the nozzle 6 so that the closure 5 can rotate between a first position and a second position. In the first position, the closure 5 closes the nozzle to prevent the flame from flowing back into the nozzle 6. In the second position, the closure 5 is away from the nozzle to facilitate the biogas to be sprayed into the premixing chamber 2. After the biogas is mixed with air in the premixing chamber 2, it enters the main chamber 1 for combustion. The nozzle 6 spraying biogas into the premixing chamber 2 can increase the biogas airflow velocity so that the air and biogas are mixed more fully. The closing member 5 closes the nozzle 6 and can prevent backfire between the premixing chamber 2 and the flame arrester 8, thereby reducing safety risks. The closing member 5 rotates between the first position and the second position to close and open the nozzle 6, and the automatic closing of the nozzle 6 is completed without manual intervention. When the biogas pressure at the nozzle 6 is insufficient, the closing member 5 can automatically close the nozzle 6 in time to prevent backfire.

[0020] The anti-flashback gas combustion device according to the embodiment of the utility model has the advantage of good safety.

[0021] In some embodiments, an angle is formed between the end surface of the nozzle opening and the extension direction of the nozzle 6. In the first position, the closure member 5 fits with the nozzle opening of the nozzle 6 to close the nozzle opening.

[0022] Specifically, the baffle is in contact with the end face of the nozzle, so that there is an angle between the baffle and the extension direction of the nozzle 6, which increases the contact area between the baffle and the nozzle of the nozzle 6, and can increase the area of ​​the baffle impacted by the airflow. When the biogas airflow is ejected from the nozzle, the baffle is tilted to face the airflow, so that there is an upward component of force on the baffle, thereby driving the baffle to rotate to the second position. The inclination of the baffle can also reduce the risk of damage to the connection between the baffle and the nozzle 6 due to the impact of the airflow. When the nozzle 6 stops ejecting airflow, the baffle's own gravity acts on the inclined end face of the nozzle to press the baffle, thereby ensuring the sealing effect of the baffle on the nozzle 6.

[0023] In some embodiments, the angle is 30° to 60°.

[0024] Specifically, when the nozzle end face is inclined at 30° to 60° relative to the extension direction of the nozzle 6, the sealing effect of the baffle on the nozzle end face is most suitable, and the rotation angle of the baffle is moderate, which avoids the baffle being over-flipped due to rapid impact of the airflow when the nozzle end face angle is too small and the baffle cannot be reset to the first position. When the nozzle end face angle is too large, the baffle in the first position cannot be closed by its own gravity.

[0025] In some embodiments, the closing member 5 is a baffle, and two side surfaces of the baffle that are oppositely arranged in the thickness direction are arranged parallel to the end surface of the nozzle.

[0026] Specifically, the two sides of the baffle are parallel to each other, and the side is parallel to the end face of the nozzle so that the baffle fits the end face to achieve complete sealing and reduce biogas leakage. The two sides of the baffle in the thickness direction are parallel to each other to reduce the influence of the baffle's own thickness on the position of the baffle's center of gravity.

[0027] Optionally, one of the two side surfaces in the thickness direction of the baffle is parallel to and abuts against the end face of the nozzle, and the other side surface intersects with the plane where the end face of the nozzle is located, so that the thickness of the baffle is uneven, and the first end of the baffle is rotatably connected to the nozzle 6, and the baffle rotates relative to the nozzle with the first end of the baffle as the axis. The center of gravity of the baffle can be offset to the side of the second end of the baffle, so as to better utilize the baffle's own weight to close the nozzle 6.

[0028] In some embodiments, the anti-flashback gas combustion device further includes a counterweight, one end of the baffle is pivotally connected to the nozzle 6 , and the counterweight is disposed at the other end of the closing member 5 .

[0029] Specifically, the first end of the baffle is rotatably connected to the nozzle 6, and the baffle rotates relative to the nozzle with the first end of the baffle as the axis. The counterweight is arranged at the second end of the baffle to adjust the center of gravity of the baffle and increase the weight of the baffle, so that the baffle can fit the nozzle more closely. The counterweight increases the component of force between the baffle and the nozzle, so that a larger pressure of biogas is required to be ejected at the nozzle to push the baffle to rotate, thereby achieving a good closure of the nozzle.

[0030] In some embodiments, the anti-flashback gas combustion device also includes a magnetic attraction component, which includes a first magnetic attraction block and a second magnetic attraction block that are magnetically attracted to each other. The first magnetic attraction block is arranged on the side of the closure 5 facing the nozzle 6, and the second magnetic attraction block is arranged on the end face of the nozzle 6 facing the closure 5.

[0031] Specifically, the two magnetic blocks are magnetically attracted to each other. When the closing member 5, i.e., the baffle, is in the first position, the first magnetic block and the second magnetic block magnetically attract and fix the baffle to the nozzle 6. After the biogas at the nozzle pushes the baffle to rotate to the second position, the first magnetic block and the second magnetic block are separated under the action of external force. When the biogas airflow velocity at the nozzle decreases and causes the baffle to return from the second position to the first position, the first magnetic block is accelerated by the magnetic attraction of the second magnetic block and drives the baffle to move to the second position until the two magnetic blocks are in contact. The two magnetic blocks increase the sealing strength between the closing member 5 and the nozzle 6, and the baffle can be quickly reset to the first position with the help of magnetic attraction.

[0032] Optionally, a third magnetic block that magnetically repels the first magnetic block is provided at the first position of the baffle. When the biogas at the nozzle of the nozzle 6 decreases, the third magnetic block magnetically repels the first magnetic block to push the first magnetic block and the second end of the baffle to rotate away from the first position, thereby avoiding excessive flipping of the baffle and ensuring that the baffle freely falls back to the second position.

[0033] In some embodiments, there are multiple nozzles 6 , which are arranged at intervals, and there are multiple baffles, which correspond to the multiple nozzles 6 one by one.

[0034] Specifically, multiple nozzles 6 can be evenly spaced in the premixing chamber 2 so that the biogas is evenly distributed in the premixing chamber 2, so that the biogas and air are fully mixed, and the baffles correspond to the nozzles 6 one by one to achieve the closure of each nozzle 6 to prevent backfire. Multiple nozzles 6 can increase the biogas delivery speed, and the intervals between the nozzles 6 can be adjusted to the size of the premixing chamber 2.

[0035] In some embodiments, the anti-flashback gas combustion device also includes an air supply pipeline, which includes a main pipeline 3 and a branch pipeline 4, one end of the branch pipeline 4 is connected to the main pipeline 3, and the other end of the branch pipeline is suitable for being connected to the torch, one end of the main pipeline 3 enters the premixing chamber 2, and the nozzle 6 is arranged at the end of the main pipeline 3 extending into the premixing chamber 2.

[0036] Specifically, the main pipeline 3 and the branch pipeline 4 are separated, the branch pipeline 4 is connected to the torch as a permanent lamp, and the main pipeline 3 is used to deliver air to complete the combustion work. The main pipeline 3 is connected to the nozzle 6 and increases the air flow speed in the pipeline, so that the air in the premixing room is fully mixed by the high-speed air flow disturbance.

[0037] In some embodiments, the anti-backfire gas combustion device also includes an automatic control valve 7 and a flame arrester 8. The automatic control valve 7 is arranged on the main pipeline 3 to control the flow rate of biogas in the main pipeline 3. The flame arrester 8 is arranged on the main pipeline 3 and is located between the automatic control valve 7 and the nozzle 6.

[0038] Specifically, the automatic control valve 7 is used to control the flow rate and opening and closing of the airflow of the main pipeline 3, and the flame arrester 8 can prevent the flame from flowing back through the main pipeline 3 to cause danger. The flame arrester 8 is located on the pipeline between the automatic control valve 7 and the nozzle 6 to protect the automatic control valve 7.

[0039] In some embodiments, the anti-backfire gas combustion device also includes an igniter 9 and a thermometer 10. The thermometer 10 is arranged on the branch pipe 4 to detect the temperature of the torch. The thermometer 10 is electrically connected to the igniter 9. The igniter 9 is arranged on the branch pipe 4 and is used to ignite when the temperature of the torch detected by the thermometer 10 is lower than a preset temperature.

[0040] Specifically, the thermometer 10 is used to monitor the flame temperature of the ever-burning lamp. When the flame temperature of the torch is lower than the set value, the thermometer 10 sends a signal to the igniter 9, which starts the igniter 9 to ignite, ensuring that the ever-burning lamp is in a normally open state. The branch pipe 4 passes through the automatic control valve 7 and is connected to the biogas source, realizing the independent gas supply of the ever-burning lamp to ensure that the continuity of lighting is not affected by the automatic control valve 7.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A flashback-proof gas combustion device, characterized in that: include: A combustion body, the combustion body comprising a main chamber and a premixing chamber, the premixing chamber being in communication with the main chamber, and the premixing chamber being suitable for introducing air; A nozzle, the nozzle is arranged in the premixing chamber and has a nozzle, the nozzle is used to spray biogas into the premixing chamber so that the biogas and the air are premixed in the premixing chamber to form a mixed gas, and the mixed gas burns in the main chamber to form a flame; A closure member is pivotally connected to the nozzle so that the closure member can rotate between a first position and a second position. In the first position, the closure member closes the nozzle to prevent the flame from flowing back into the nozzle. In the second position, the closure member is away from the nozzle to facilitate the injection of the biogas into the premixing chamber.

2. The anti-flashback gas combustion device according to claim 1, characterized in that: An angle is formed between the end surface of the spout and the extension direction of the nozzle. In the first position, the sealing member is fitted with the spout of the nozzle to seal the spout.

3. The anti-flashback gas combustion device according to claim 2, characterized in that: The angle is 30° to 60°.

4. The anti-flashback gas combustion device according to claim 2, characterized in that: The closing member is a baffle, and two side surfaces of the baffle that are oppositely arranged in the thickness direction are arranged parallel to the end surface of the nozzle.

5. The anti-flashback gas combustion device according to claim 4, characterized in that: It also includes a weight counter. One end of the baffle is pivotally connected to the nozzle, and the weight counter is arranged at the other end of the closure.

6. The anti-flashback gas combustion device according to claim 1, characterized in that: It also includes a magnetic attraction component, which includes a first magnetic attraction block and a second magnetic attraction block that are magnetically attracted to each other. The first magnetic attraction block is arranged on the side of the closure component facing the nozzle, and the second magnetic attraction block is arranged on the end surface of the nozzle facing the closure component.

7. The anti-flashback gas combustion device according to any one of claims 4-5, characterized in that: There are a plurality of nozzles, and the plurality of nozzles are arranged at intervals; there are a plurality of baffles, and the plurality of baffles correspond to the plurality of nozzles one by one.

8. The anti-flashback gas combustion device according to any one of claims 1 to 6, characterized in that: It also includes an air supply pipeline, which includes a main pipeline and a branch pipeline. One end of the branch pipeline is connected to the main pipeline, and the other end of the branch pipeline is suitable for being connected to a torch. One end of the main pipeline enters the premixing chamber, and the nozzle is arranged at one end of the main pipeline extending into the premixing chamber.

9. The anti-flashback gas combustion device according to claim 8, characterized in that: It also includes an automatic control valve and a flame arrester. The automatic control valve is arranged on the main pipeline to control the flow of biogas in the main pipeline. The flame arrester is arranged on the main pipeline and located between the automatic control valve and the nozzle.

10. The anti-flashback gas combustion device according to claim 8, characterized in that: It also includes an igniter and a thermometer. The thermometer is arranged on the branch pipe to detect the temperature of the torch. The thermometer is electrically connected to the igniter. The igniter is arranged on the branch pipe to ignite when the temperature of the torch detected by the thermometer is lower than a preset temperature.

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