Burning gun and kiln

Abstract

The utility model discloses a burning gun and a kiln, the burning gun comprises an inner pipe, and a natural gas flowing channel is arranged in the inner pipe; the inner pipe is sleeved with the outer pipe, and a cooling liquid flowing channel is formed in the outer pipe; the cooling liquid circulating pipeline is communicated with the outer pipe; the heat exchanger is respectively communicated with the inner pipe and the cooling liquid circulating pipeline; cooling liquid of the cooling liquid circulating pipeline can reduce the temperature of the inner pipe and the outer pipe, and the heat exchanger is provided with a heat exchange space for the cooling liquid and natural gas. According to the scheme, the cooling liquid circulating pipeline and the heat exchanger are arranged outside the burning gun, the cooling liquid circulating pipeline can be used for cooling the inner pipe and the outer pipe of the burning gun, the heat exchanger can be used for enabling cooling liquid to exchange heat with natural gas, and the utilization rate of the cooling liquid and the cooling efficiency of the burning gun are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of burner liquid cooling, in particular to a burner and a kiln. Background Art

[0002] The kiln burner uses oxygen and natural gas mixed in a certain proportion for combustion. The use of liquefied natural gas has high energy density, especially good peak-shaving performance, which ensures that the gas output can be stable during peak usage. However, the kiln burner muzzle is prone to deformation due to long-term operation at a high temperature of one thousand degrees. When the burner mouth is reduced, the flame shifts, making the kiln temperature unstable. The existing method is mostly to use high-temperature resistant metal to make the burner head, and replace the burner head when it is deformed.

[0003] CN112608009A discloses a method for controlling nitrogen oxides in a TFT-LCD liquid crystal glass furnace, and mentions cooling the burner by introducing oxygen. However, this method cannot recycle oxygen, and the cooling efficiency of the gas is generally low. Utility Model Content

[0004] A technical problem to be solved by the utility model is that the kiln burner is prone to deformation due to excessive temperature when in use, and the existing cooling method has low cooling efficiency.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a burner on the one hand, which includes: an inner tube, in which a flow channel for natural gas is provided; an outer tube arranged outside the inner tube, in which a flow channel for coolant is provided; a coolant circulation pipeline, which is connected to the outer tube; and a heat exchanger, which is respectively connected to the inner tube and the coolant circulation pipeline; wherein the coolant in the coolant circulation pipeline can reduce the temperature of the inner tube and the outer tube, and the heat exchanger has a heat exchange space between the coolant and the natural gas.

[0006] In some embodiments, the coolant circulation pipe includes a first circulation pipe and a second circulation pipe, the first end of the first circulation pipe is connected to the heat exchanger, and the second end of the first circulation pipe is connected to the first interface of the outer pipe; the first end of the second circulation pipe is connected to the heat exchanger, and the second end of the second circulation pipe is connected to the second interface of the outer pipe.

[0007] In some embodiments, a stopper is provided at the end of the burner to prevent the outer tube from communicating with the inner tube.

[0008] In some embodiments, a gas delivery pipeline is connected between the heat exchanger and the inner tube.

[0009] In some embodiments, the gas delivery pipeline includes a main delivery pipeline and an auxiliary delivery pipeline, the main delivery pipeline is used to deliver natural gas, and the auxiliary delivery pipeline is used to deliver natural gas and oxygen.

[0010] In some embodiments, an oxygen delivery pipeline is connected to the auxiliary delivery pipeline.

[0011] In some embodiments, a connecting pipe is provided between the oxygen delivery pipe and the auxiliary delivery pipe, and the connecting pipe is a venturi tube.

[0012] In some embodiments, rifling is provided on the inner wall of the inner tube to generate swirling flow of the combustion gas.

[0013] In some embodiments, a baffle is provided at the outlet of the inner tube to diffuse the gas at the outlet.

[0014] The second aspect of the utility model provides a kiln, which comprises: a kiln body; and a burning gun; wherein the head of the burning gun can be inserted into the side wall of the kiln body.

[0015] Through the above technical scheme, a coolant circulation pipeline and a heat exchanger are arranged outside the burner, which can not only use the coolant circulation pipeline to cool the inner tube and the outer tube of the burner, but also use the heat exchanger to exchange heat between the coolant and the natural gas, thereby improving the utilization rate of the coolant and the cooling efficiency of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 The utility model discloses a burner with an overall structure.

[0018] Description of Reference Numerals

[0019] 1. Natural gas inlet; 2. Heat exchanger; 3. Coolant outlet; 4. Coolant inlet; 5. Oxygen inlet; 6. Regulating valve; 7. Mixing chamber; 8. Rifling; 9. Baffle; 10. First heat exchange pipeline; 11. Coolant circulation pipeline; 1101. First circulation pipeline; 1102. Second circulation pipeline; 12. Natural gas delivery pipeline; 1201. Main delivery pipeline; 1202. Auxiliary delivery pipeline; 13. Oxygen delivery pipeline; 14. Natural gas outlet; 15. Burning muzzle; 16. Kiln. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the utility model in conjunction with the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the utility model, but cannot be used to limit the scope of the utility model. The utility model can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0021] The utility model provides these embodiments to make the utility model thorough and complete, and to fully express the scope of the utility model to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as merely exemplary, rather than as limiting.

[0022] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, 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. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0023] In addition, the words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0024] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0025] All terms used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0026] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0027] In order to solve the existing problem that the kiln burner is easily deformed due to excessive temperature when in use and the existing cooling method has low cooling efficiency, the utility model provides a burner, including: an inner tube, in which a natural gas flow channel is provided; an outer tube sleeved outside the inner tube, in which a coolant flow channel is provided; a coolant circulation pipeline 11, which is connected to the outer tube; and a heat exchanger 2, which is respectively connected to the inner tube and the coolant circulation pipeline 11;

[0028] The coolant in the coolant circulation pipe 11 can lower the temperature of the inner tube and the outer tube, and the heat exchanger 2 has a heat exchange space between the coolant and the natural gas.

[0029] like Figure 1 As shown, the outer tube and the inner tube can be metal round tubes, and the outer tube and the inner tube can be fixedly connected by partial welding. The flow channel of the natural gas is the hollow part of the inner tube, and the flow channel of the coolant is the annular gap between the outer tube and the inner tube. After the coolant flowing into the outer tube contacts the tube wall of the inner tube, the inner tube wall can be cooled down, thereby reducing the temperature of the natural gas in the tube wall of the inner tube. At the same time, the coolant can also cool down the tube wall of the outer tube.

[0030] The heat exchanger 2 is used to transport the natural gas required for the burner of the utility model to work, and the coolant circulation pipeline 11 is used to transport the coolant required for the burner of the utility model to work, and constitute an external circulation pipeline to recover the heat generated in the production process. Specifically, the heat exchanger 2 can be connected to the coolant circulation pipeline 11, and the heat exchange space of the heat exchanger 2 can be provided with a first heat exchange pipeline 10 and a second heat exchange pipeline (not shown in the figure), the first heat exchange pipeline 10 can be provided with a natural gas inlet 1 to allow natural gas to enter the inside of the heat exchanger 2, and the second heat exchange pipeline can be connected to the coolant circulation pipeline 11 to allow coolant to enter the inside of the heat exchanger 2. After the coolant flows through the burner head, the temperature can reach 55 to 65 degrees Celsius. This part of the heat of the coolant can preheat the natural gas entering the heat exchanger 2, realize the recovery of waste heat, and avoid the situation where the natural gas supply is not smooth due to too low temperature. After absorbing the temperature of the coolant, the natural gas is converted from liquid to gas, that is, the natural gas flowing into the heat exchanger 2 is liquefied natural gas, and the natural gas flowing out of the heat exchanger 2 is gaseous natural gas; the temperature of the high-temperature coolant is reduced after the heat is absorbed, that is, the coolant flowing out of the heat exchanger 2 can enter the coolant circulation pipeline 11 to continue to cool the burner head.

[0031] Through the above technical solution, a coolant circulation pipeline 11 and a heat exchanger 2 are arranged outside the burner. Not only can the coolant circulation pipeline 11 be used to cool the inner tube and the outer tube of the burner, but the heat exchanger 2 can also be used to exchange heat between the coolant and the natural gas, thereby improving the utilization rate of the coolant and the cooling efficiency of the burner.

[0032] In some embodiments, the coolant circulation pipe 11 includes a first circulation pipe 1101 and a second circulation pipe 1102, the first end of the first circulation pipe 1101 is connected to the heat exchanger 2, and the second end of the first circulation pipe 1101 is connected to the first interface of the outer tube; the first end of the second circulation pipe 1102 is connected to the heat exchanger 2, and the second end of the second circulation pipe 1102 is connected to the second interface of the outer tube.

[0033] The first circulation pipeline 1101 can deliver low-temperature coolant to the burner to cool it, and can be delivered by a circulation pump, and the second circulation pipeline 1102 can deliver high-temperature coolant returned from the burner back to the heat exchanger 2 to preheat the natural gas. Figure 1As shown, the first end of the first circulation pipe 1101 can be provided with a coolant inlet 4 to be connected to the heat exchanger 2, and the first end of the second circulation pipe 1102 can be provided with a coolant outlet 3 to be connected to the heat exchanger 2; the outer tube can be provided with a first interface connected to the first circulation pipe 1102 and a second interface connected to the second circulation pipe 1102, preferably, the first interface and the second interface can be arranged at the tail of the burner to avoid the influence of the high temperature at the head of the burner on the pipeline, and check valves can be arranged at the first interface and the second interface to ensure the circulation of the coolant.

[0034] In some embodiments, a stopper is provided at the end of the burner to prevent the outer tube from communicating with the inner tube. The end of the burner may include a head and a tail of the burner, and the stopper may be a baffle. The stopper needs to ensure that the annular section between the outer tube and the inner tube of the burner is completely blocked and sealed, thereby completely isolating the natural gas from the coolant.

[0035] In some embodiments, a gas delivery pipeline is connected between the heat exchanger 2 and the inner tube. Figure 1 As shown, the gas delivery pipeline is used to deliver the gas required for combustion, including natural gas and oxygen. Specifically, one end of the gas delivery pipeline is connected to the first heat exchange pipeline 10 in the heat exchanger 2, and the other end is provided with a natural gas outlet 14 and connected to the mixing chamber 7 in the inner tube of the burner. The mixing chamber 7 is used to mix natural gas and oxygen to improve the combustion efficiency. The gas delivery pipeline and the coolant circulation pipeline 11 can both adopt metal convenient hoses, and the flanges on the hoses are connected to the flanges on the burner.

[0036] In some embodiments, the gas delivery pipeline includes a main delivery pipeline 1201 and an auxiliary delivery pipeline 1202, the main delivery pipeline 1201 is used to deliver natural gas, and the auxiliary delivery pipeline 1202 is used to deliver natural gas and oxygen. Figure 1 As shown, the main delivery pipeline 1201 and the auxiliary delivery pipeline 1202 are respectively connected to the mixing chamber 7 at different openings of the inner tube, and the main delivery pipeline 1201 and the auxiliary delivery pipeline 1202 together constitute the natural gas delivery pipeline 12.

[0037] In some embodiments, the auxiliary delivery pipeline 1202 is connected to the oxygen delivery pipeline 13. Figure 1 As shown, the oxygen delivery pipeline 13 has an oxygen inlet 5 , and the oxygen delivery pipeline 13 can be connected to the middle of the auxiliary delivery pipeline 1202 , and oxygen and part of the natural gas are first premixed in the auxiliary delivery pipeline 1202 .

[0038] In some embodiments, a connecting pipe is provided between the oxygen delivery pipe 13 and the auxiliary delivery pipe 1202, and the connecting pipe is a venturi tube. Figure 1As shown, a certain mixing ratio (generally 2:1) of oxygen and natural gas needs to be maintained in the mixing chamber 7 to keep the combustion efficiency and temperature within the optimal range. Working principle of the venturi tube: When part of the gaseous natural gas passes through the venturi tube between the auxiliary delivery pipeline 1202 and the oxygen delivery pipeline 13, the throttling component venturi valve in the venturi tube adjusts the flow rate to increase, so that a static pressure difference is formed before and after the venturi tube, and the amount of oxygen inhaled by the auxiliary delivery pipeline 1202 fluctuates with the amount of natural gas intake flowing through the venturi tube, so that a certain mixing ratio of oxygen and natural gas is always maintained in the mixing chamber 7.

[0039] In some embodiments, rifling 8 is provided on the inner wall of the inner tube to cause the combustion gas to generate swirl. Figure 1 As shown, the rifling 8 can be arranged in a section of the inner tube near the burner head, one end of which is connected to the burner outlet, and the other end can be connected to the mixing chamber 7. When the gas with a certain pressure passes through this section of the pipeline, it can generate friction with the rifling 8, so that the state of the gas changes, the airflow generates swirl, and the gas is closer to the central axis of the burner.

[0040] In some embodiments, the outlet of the inner tube is provided with a baffle 9 to allow the gas to diffuse at the outlet. Figure 1 As shown, the baffle 9 is conical and arranged at the center of the cross section of the inner tube. When the gas collides with the baffle 9, the baffle 9 has a certain taper, which causes the rotating gas to diffuse around at the outlet and enter the kiln, and the gas is ignited at the burner outlet. In addition, since there is a baffle 9 at the outlet, the flame will not produce a flame core, that is, no coking material will be produced due to incomplete combustion, and the combustion efficiency of the gas is also improved.

[0041] Another aspect of the utility model provides a kiln, comprising: a kiln body; and the aforementioned burning gun; wherein the head of the burning gun can be inserted into the side wall of the kiln body.

[0042] The kiln is an oxygen furnace, and the bottom uses electrode discharge to heat the glass liquid. The burner is on the top of the glass liquid, and the surface of the glass liquid is heated again to ensure that the temperature of the glass liquid is constant. The natural gas delivered to the burner comes from the kiln gas distribution plate. Specifically, the gas delivery pipeline 11 of each burner is connected to a main pipeline, which is the gas delivery pipeline of the kiln gas distribution plate. Figure 1 As shown, the head of the burner gun is a section of pipe at the outlet of the inner tube and the outer tube of the burner gun, and this part is welded and fixed to the side wall of the kiln body. The burner gun is arranged on the opposite side wall of the kiln body, and there can be multiple burners. In some specific embodiments, four burners can be arranged on each side wall.

[0043] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0044] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A burning gun, characterized in that: include: an inner tube, wherein a flow channel for natural gas is provided in the inner tube; An outer tube sleeved outside the inner tube, wherein a flow channel for a coolant is provided in the outer tube; a cooling liquid circulation pipe (11), the cooling liquid circulation pipe (11) being in communication with the outer pipe; and A heat exchanger (2), the heat exchanger (2) being in communication with the inner tube and the coolant circulation pipe (11) respectively; The coolant in the coolant circulation pipe (11) can lower the temperature of the inner tube and the outer tube, and the heat exchanger (2) has a heat exchange space between the coolant and the natural gas.

2. The burner according to claim 1, characterized in that: The coolant circulation pipeline (11) comprises a first circulation pipeline (1101) and a second circulation pipeline (1102), wherein the first end of the first circulation pipeline (1101) is connected to the heat exchanger (2), and the second end of the first circulation pipeline (1101) is connected to the first interface of the outer tube; the first end of the second circulation pipeline (1102) is connected to the heat exchanger (2), and the second end of the second circulation pipeline (1102) is connected to the second interface of the outer tube.

3. The burner according to claim 1, characterized in that: A stopper is provided at the end of the burner to prevent the outer tube from communicating with the inner tube.

4. The burner according to claim 1, characterized in that: A gas delivery pipeline is connected between the heat exchanger (2) and the inner tube.

5. The burner according to claim 4, characterized in that: The gas delivery pipeline comprises a main delivery pipeline (1201) and an auxiliary delivery pipeline (1202), wherein the main delivery pipeline (1201) is used to deliver natural gas, and the auxiliary delivery pipeline (1202) is used to deliver natural gas and oxygen.

6. The burner according to claim 5, characterized in that: The auxiliary delivery pipeline (1202) is connected to an oxygen delivery pipeline (13).

7. The burner according to claim 6, characterized in that: A connecting pipe is provided between the oxygen delivery pipe (13) and the auxiliary delivery pipe (1202), and the connecting pipe is a venturi tube.

8. The burner according to claim 1, characterized in that: The inner wall of the inner tube is provided with rifling (8) to cause the combustion gas to generate swirl.

9. The burner according to claim 1, characterized in that: The outlet of the inner tube is provided with a baffle (9) to allow the gas to diffuse at the outlet.

10. A kiln, characterized in that: include: Kiln body; and The burner according to any one of claims 1 to 9; Wherein, the head of the burning gun can be inserted into the side wall of the kiln body.

Images