Burner applicable to full-premixing condensation heat exchanger

Abstract

The utility model discloses a combustor suitable for a full-premixing condensation heat exchanger, which has the following beneficial effects that a flange connecting disc is arranged at the upper port of a combustion shell; a plurality of annular flow guide plates are vertically arranged in the combustion shell, so that a plurality of flow guide layers are obtained through separation; wherein the multiple annular flow guide plates are each of a trumpet-shaped structure with an opening facing the shell bottom direction, the inner ring calibers of the multiple annular flow guide plates are of a structure with equal proportion reduction from top to bottom, and multiple nozzle mechanisms communicating with the flow guide layer are arranged on the outer wall of the combustion shell. The combustor has the advantages that the annular guide plate for guiding smoke and flame is arranged in the upper end of the combustor, so that the flame and the smoke can be quickly guided to different heights to further flow to the inner wall of the combustor and flow out through a nozzle mechanism on the combustor, and the heat production efficiency of the combustor is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of combustor, specifically relates to a combustor suitable for full premixing condensation heat exchanger. BACKGROUND

[0002] Natural gas and oxygen flow into the premixing cavity through the gas control proportional valve, and the two are mixed in the cavity and then burned in the heat exchanger under the action of the igniter, the high-temperature flue gas generated in the process is exchanged in the main heat exchanger, and the heat is sent to the room through the heating channel, and the flue gas is discharged to the outside through the balance type chimney. However, in the use process of the traditional combustor, the flue gas generated in the combustor cannot flow quickly and centrally to the combustor shell, which leads to the problem that the device is prone to turbulence, and the flame spraying effect of the combustor surface is not good.

[0003] For example, patent application No. CN211781085U discloses a full premixing combustor, which is provided with a fire hole on the surface of the combustor, and a baffle for mixing natural gas and oxygen is arranged on the front plate, so as to complete the combustion of natural gas and oxygen. However, the internal structure of the device is annular and planar, so that the flue gas and heat flow cannot flow quickly to the fire hole, which leads to the problem that the internal flue gas and heat flow are prone to turbulence, and the overall combustion effect of the device is not good. UTILITY MODEL CONTENTS

[0004] An object of the present utility model is to solve at least the above problems and / or defects, and to provide at least the advantages to be explained later.

[0005] In order to achieve these objects and other advantages according to the present utility model, a combustor suitable for full premixing condensation heat exchanger is provided, comprising:

[0006] A combustion shell is provided with a flange connecting disc on the upper end;

[0007] A plurality of annular flow guides are arranged vertically in the combustion shell, thereby separating a plurality of flow guide layers;

[0008] Among them, the plurality of annular flow guides are arranged as a horn-shaped structure with the opening facing the shell bottom direction, and the inner circle diameter of the plurality of annular flow guides is arranged in an equal proportion from top to bottom, and the outer wall of the combustion shell is provided with a plurality of jet mechanisms communicating with the flow guide layers.

[0009] Preferably, the combustion shell is provided with an air inlet plate on the inner wall of the upper end, a central air passage is formed in the center of the air inlet plate, a plurality of outer air passages are formed around the central air passage, and a fan blade is arranged at the lower end of each outer air passage to improve the mixing efficiency of oxygen and natural gas.

[0010] Preferably, the jet mechanism comprises:

[0011] a jet group comprising three vertically arranged jet holes, each of which is arranged as a structure with a tapered opening outward;

[0012] two side plates symmetrically arranged on both sides of the jet group, the end of each of which extends outward and gradually tapers.

[0013] Preferably, the bottom of the combustion shell is arranged as a conical structure with an opening downward, and the end of the conical structure of the bottom surface of the shell is directly opposite the central vent.

[0014] Preferably, a plurality of elongated vents are formed in the inner side of each of the two side plates.

[0015] The utility model at least includes following beneficial effects: through being arranged the annular deflector that smoke and flame are guided in the upper end of combustor, make flame and smoke can be guided to different height to further flow to the inner wall of combustor, and flow out through the spout mechanism on combustor, and the structure of spout mechanism makes flame and smoke get beam and concentrate when flowing through jet hole, two side plates concentrate flame further, make the flame and heat flow that heat exchanger shell sprays are higher, can transmit heat to farther distance, further improve the heat production efficiency of combustor.

[0016] Other advantages, objects, and features of the utility model will be partly embodied through the following description, and some will be understood by those skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a kind of combustor suitable for full premixing condensation heat exchanger;

[0018] Fig. 2 It is a sectional view of combustor;

[0019] Fig. 3 It is a sectional view of combustor;

[0020] Fig. 4 It is a sectional view of combustor;

[0021] Fig. 5 It is a sectional view of combustor;

[0022] Markings in the figure: 1, combustion shell, 11, flange connecting disc, 12, annular deflector, 13, spout mechanism, 131, jet group, 131-A, jet hole, 132, side plate, 132-A vent, 15, air inlet plate, 16, central vent, 17, outer vent, 171, fan blade. DETAILED DESCRIPTION

[0023] The utility model makes further detailed description in combination with the drawings, so that the person skilled in the art can implement according to the description.

[0024] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0025] It should be noted that in the description of the utility model, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "mount", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected, can be indirectly connected through an intermediate medium, or can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In addition, in the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0028] As shown in FIG. Figs. 1-5 A burner suitable for a full-premix condensing heat exchanger, comprising:

[0029] A combustion shell 1, a flange connecting disc 11 is arranged on the upper end;

[0030] A plurality of annular flow guide plates 12 are arranged vertically in the combustion shell 1, thereby being separated into a plurality of flow guide layers;

[0031] The plurality of annular flow guide plates 12 are arranged as a horn-shaped structure with openings facing the bottom of the shell, and the inner diameters of the plurality of annular flow guide plates 12 are arranged in a structure of equal proportionally decreasing from top to bottom, and the outer wall of the combustion shell 1 is provided with a plurality of nozzle mechanisms 13 in communication with the flow guide layer.

[0032] Working principle:

[0033] When the operator starts the heat exchanger, water flows through the coil in the heat exchanger, at this time, under the action of full premixing fan and other devices, combustible mixed gas such as natural gas and oxygen flows into the burner, and is ignited under the action of the igniter, thereby completing the combustion of the combustible gas.

[0034] In the combustion process, the flame and hot gas flow generated by the combustion of the combustible gas can be divided by the plurality of annular flow guide plates 12, and flow to the inner wall of the combustion shell 1 in the flow guide layer, and flow out of the combustion shell 1 through the nozzle mechanism 13 in communication with the inner wall of the combustion shell 1, thereby forming a plurality of flame jets on the outer peripheral surface of the combustion shell 1. In the above process, the annular flow guide plate 12 is arranged as a horn-shaped structure expanding towards the bottom of the shell, so that the flame and hot flow can smoothly flow in the expanding direction in the flow guide layer formed between the plurality of annular flow guide plates 12 after flowing out of the inlet of the combustion shell 1; the inner diameters of the plurality of annular flow guide plates 12 are arranged as a shrinking type opening from top to bottom, which ensures that the downwardly injected flame and hot flow can smoothly flow between different flow guide layers, avoiding turbulence of the flame and hot flow on the inner wall of the burner.

[0035] In order to further ensure the stability and effectiveness of the flame generated by the burner, the nozzle mechanism 13 is usually arranged as a ring-shaped equidistant distribution at different heights on the outer wall of the burner. Further ensure that the ejected flame jet port is uniformly arranged on the outer periphery of the burner. The flange connection disc 11 on the combustion shell 1 is used for fixed installation in the heat exchanger.

[0036] In the above technical solution, the inner wall of the combustion shell 1 is provided with an air inlet plate 15 at the upper end, the center of the air inlet plate 15 is provided with a center air passage 16, the outer periphery of the center air passage 16 is provided with a plurality of outer air passages 17, and the lower end of each outer air passage 17 is provided with a fan blade 171 for improving the mixing efficiency of oxygen and natural gas.

[0037] Through the above arrangement, in the process of introducing the mixed combustible gas of natural gas and oxygen into the burner in the heat exchanger, the combustible gas flows into the combustion shell 1 through the center air passage 16 and the plurality of outer air passages 17, and the fan blade 171 at the lower end of the outer air passage 17 can further remix the natural gas and oxygen, so as to further improve the combustion efficiency of the mixed combustible gas in the burner.

[0038] In the above technical solution, the nozzle mechanism 13 comprises:

[0039] The jet group 131 comprises three vertically arranged jet holes 131-A, each of which is arranged as a structure with a converging opening outwardly;

[0040] Two side plates 132 are symmetrically arranged on both sides of the jet group 131, and the end portions of the two side plates 132 extend outwardly and gradually converge.

[0041] Through the above arrangement, when the flame and the heat flow pass through the jet group 131, the single jet hole 131-A is arranged as a converging opening outwardly, so that the ejected flame and the heat flow are integrated and further away, and the three are arranged in a group, and the two side plates 132 on both sides of the jet group 131 are arranged as a converging structure outwardly, so as to further concentrate the flame and the heat flow on the jet group 131, so that each jet mechanism 13 can eject a more concentrated heat flow and flame beam, thereby enabling the fluid in the coil in the heat exchanger to absorb more heat, and further improving the heat exchange efficiency of the heat exchanger.

[0042] In the above technical solution, the bottom surface of the combustion shell 1 is arranged as a conical structure with an opening downwardly, and the end portion of the conical structure of the bottom of the shell is opposite to the central air hole.

[0043] Through the above arrangement, when part of the combustible gas burns after flowing through the central air hole 16, the flame and the heat flow generated thereby can smoothly flow through the inner ring of the plurality of annular flow guide plates 12 and directly reach the bottom of the combustion shell 1, thereby ensuring that the bottom of the combustion shell 1 also has a stable heat source input; at the same time, the conical structure arrangement of the bottom of the combustion shell 1 can increase the contact area of the combustion shell 1 and the air, and improve the heat conduction effect.

[0044] In the above technical solution, a plurality of elongated air holes 132-A are formed in the inner sides of the two side plates 132.

[0045] Through the above arrangement, the elongated air holes 132-A in the inner sides of the side plates 132 can increase the speed of the flame and the heat flow flowing through the inner wall of the burner, and the ejected flame and the heat flow can further enhance the integration of the flame ejected by each jet mechanism 13, so that the flame ejected by the single jet mechanism 13 has a longer range and a higher temperature.

[0046] Although the embodiments of the present application have been disclosed as above, they are not limited to the application and implementation described in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A burner suitable for a full premix condensing heat exchanger, comprising: a combustion shell, the upper end of which is provided with a flange connection disc, characterized in that: a plurality of annular guide plates are arranged vertically in the combustion shell, thereby separating a plurality of guide layers; wherein the plurality of annular guide plates are arranged as a horn-shaped structure with the opening facing the shell bottom, and the inner diameter of the plurality of annular guide plates is arranged in a structure that is proportionally reduced from top to bottom, and the outer wall of the combustion shell is provided with a plurality of injection mechanisms communicating with the guide layers.

2. The burner with total premix condensing heat exchanger as claimed in claim 1 wherein, an air inlet plate is arranged on the inner wall of the combustion shell, a central air passage is formed in the center of the air inlet plate, a plurality of outer air passages are formed around the central air passage, and each outer air passage is provided with a fan blade to improve the mixing efficiency of oxygen and natural gas.

3. The burner with total premix condensing heat exchanger as claimed in claim 1 wherein, the injection mechanism comprises: an air injection group, which comprises three vertically arranged air injection holes, each air injection hole being arranged in a structure with the opening outwardly tapered; two side plates are symmetrically arranged on both sides of the air injection group, and the end portions of the two side plates extend outwardly and gradually taper.

4. The burner with total premix condensing heat exchanger as claimed in claim 2 wherein, the bottom of the combustion shell is arranged as a downward-opening conical structure, and the end portion of the conical structure is directly opposite the central air passage.

5. The burner with total premix condensing heat exchanger as claimed in claim 4 wherein, a plurality of elongated air passages are formed in the inner sides of the two side plates.

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