Combustion-supporting device of annular heating furnace

Abstract

The utility model relates to a combustion-supporting device of an annular heating furnace, which is applied to the technical field of heating furnaces, and solves the problems that when the existing heating furnace works, the pressure fluctuation of a gas header pipe and a combustion-supporting air header pipe is larger, the air-fuel ratio of burners in other heating areas is influenced, and the heat treatment process of products is indirectly influenced. Comprising a combustion-supporting air conveying branch pipe, a combustion-supporting air energy storage device and a combustion-supporting air conveying header pipe, the combustion-supporting air conveying branch pipe is used for conveying combustion gas into each ignition nozzle, and the combustion-supporting air conveying assembly comprises a combustion-supporting air conveying branch pipe, a combustion-supporting air energy storage device and a combustion-supporting air conveying header pipe. The fuel gas energy storage device and the combustion-supporting air energy storage device are both sealed box bodies with the interiors of hollow structures. The annular heating furnace has the advantages that the flow and pressure of fuel gas and combustion-supporting air entering the annular heating furnace can be stable, and therefore the product machining quality of the annular heating furnace is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heating furnace technical field, in particular to a kind of annular heating furnace combustion-supporting device. BACKGROUND

[0002] The prior art patent publication number "CN101261076A" discloses a kind of high-efficiency annular heating furnace, mainly using annular furnace body and rotary furnace bottom is constituted, characterized in that multiple pairs of regenerative burners are provided on annular furnace body or furnace top, each pair of regenerative burners is composed of M side burner and N side burner, the M side burner is connected with first coal gas quick cut valve and second reversing valve respectively;First coal gas quick cut valve is connected with coal gas main pipe, first reversing valve is connected with combustion-supporting air main pipe and smoke extraction main pipe respectively, the N side burner is connected with second coal gas quick cut valve and second reversing valve respectively, second coal gas quick cut valve is connected, coal gas main pipe, second reversing valve is connected with combustion-supporting air main pipe and smoke extraction main pipe respectively.

[0003] The above description has the following problems: the original combustion-supporting pipeline is directly connected with the burners of each heating area in the annular heating furnace by the combustion-supporting air main pipe and the combustion-supporting air branch pipe, and the combustion-supporting air is directly communicated with the burners of each heating area in the annular heating furnace by the combustion-supporting air main pipe and the combustion-supporting air branch pipe, wherein the combustion process adopts a pulse combustion method, the jet flame speed is fast, the system controls the burners by PID, and the gap is circulated. Due to the number of large fires and frequent flame switching, the pressure of the coal gas main pipe and the combustion-supporting air main pipe fluctuates greatly, which affects the air-fuel ratio of the burners in other heating areas and indirectly affects the heat treatment process of the product. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of annular heating furnace combustion-supporting device, solve the problem that the pressure of the coal gas main pipe and the combustion-supporting air main pipe fluctuates greatly when the existing heating furnace works, which affects the air-fuel ratio of the burners in other heating areas and indirectly affects the heat treatment process of the product.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] The utility model provides a kind of annular heating furnace combustion-supporting device, the annular heating furnace is divided into multiple heating areas along its circumferential direction, at least one ignition nozzle is provided in each heating area, and the combustion-supporting device comprises:

[0007] A gas delivery assembly is provided, which comprises a gas delivery branch pipe, a gas energy storage device and a gas delivery main pipe for delivering gas to each ignition nozzle respectively, and the gas inlet of each gas delivery branch pipe and the gas outlet of the gas delivery main pipe are in communication with the interior of the gas energy storage device;

[0008] Combustion-supporting air conveying assembly, which comprises combustion-supporting air conveying sub-pipes for conveying combustion-supporting air into each of the ignition nozzles respectively, a combustion-supporting air energy accumulator and a combustion-supporting air conveying main pipe, the gas inlet of each of the combustion-supporting air conveying sub-pipes and the gas outlet of the combustion-supporting air conveying main pipe are both in communication with the inside of the combustion-supporting air energy accumulator;

[0009] The gas energy accumulator is arranged on the upper end surface of the combustion-supporting air energy accumulator, and the gas energy accumulator and the combustion-supporting air energy accumulator are both sealed box bodies with a hollow structure inside.

[0010] Further, a pressure stabilizing assembly is arranged at each of the ignition nozzles, which comprises a flow proportional valve arranged at the gas outlet end of a gas conveying sub-pipe for conveying gas into the ignition nozzle, a pulse valve arranged at the gas outlet end of the combustion-supporting air conveying sub-pipe for conveying combustion-supporting air into the ignition nozzle, a temperature detector arranged on the annular heating furnace for detecting the temperature in the heating area, and an electrical control member, the signal receiving end of the flow proportional valve and the signal receiving end of the pulse valve are both connected with the signal output end of the electrical control member, and the signal conveying end of the temperature detector is connected with the signal receiving end of the electrical control member.

[0011] Further, an electromagnetic cut-off valve is arranged at the gas outlet end of the gas conveying sub-pipe, and the signal receiving end of the electromagnetic cut-off valve is connected with the signal output end of the electrical control member.

[0012] Further, a manual butterfly valve is arranged at the air outlet end of the combustion-supporting air conveying sub-pipe.

[0013] Further, the annular heating furnace further comprises an exhaust smoke pipeline for discharging the smoke generated in the annular heating furnace, and a heat exchange assembly is arranged on the exhaust smoke pipeline, which comprises a closed shell arranged on the exhaust smoke pipeline and in communication with the exhaust smoke pipeline, and at least one coil pipe arranged in the shell, the shell is a closed container, the gas inlet of the coil pipe extends out of the shell and is in communication with a blower, and the gas outlet of the coil pipe also extends out of the shell and is in communication with the gas inlet of the combustion-supporting air conveying main pipe.

[0014] Further, the number of the coil pipes is two, and the two coil pipes are arranged in series.

[0015] Thanks to the above technical scheme, the present application has the following advantages compared with the prior art:

[0016] The utility model discloses a kind of combustion-supporting devices of annular heating furnace, annular heating furnace is divided into multiple heating areas along its circumferential segmentation, at least one ignition nozzle is provided in each heating area, combustion-supporting device includes gas delivery assembly and combustion-supporting air delivery assembly, gas energy accumulator in gas delivery assembly is arranged at the upper end surface of combustion-supporting air energy accumulator in combustion-supporting air delivery assembly, and gas energy accumulator and combustion-supporting air energy accumulator are all sealed box body with hollow structure inside.It can make the flow, pressure of gas and combustion-supporting air entering into annular heating furnace more stable by the gas energy accumulator and combustion-supporting air energy accumulator arranged, to improve the quality of product processing of annular heating furnace.

[0017] Further, the temperature in the furnace can be controlled by the pressure stabilizing assembly to ensure the stability of the furnace temperature and improve the product processing quality.

[0018] Further, the combustion-supporting air entering the ignition nozzle can be heated in advance by the heat exchange assembly arranged on the smoke exhaust pipeline, ensuring the stability of the furnace temperature, and the waste smoke waste heat can also be utilized, saving energy. BRIEF DESCRIPTION OF DRAWINGS

[0019] Some specific embodiments of the utility model will be described in detail hereinafter with reference to the drawings in an exemplary but not restrictive manner. The same reference signs in the drawings denote the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0020] Figure 1 is the overall mechanism top view schematic diagram in the preferred embodiment of the utility model;

[0021] Figure 2 is the overall structure sectional view schematic diagram in the preferred embodiment of the utility model;

[0022] Figure 3 is the local enlarged view in the preferred embodiment of the utility model;

[0023] Figure 4 is the sectional view of heat exchange assembly in the preferred embodiment of the utility model.

[0024] Among them, the following is the explanation of reference signs:

[0025] 1, annular heating furnace;

[0026] 2, ignition nozzle;

[0027] 3, gas delivery assembly; 31, gas delivery sub-pipe; 32, gas energy accumulator; 33, gas delivery main pipe;

[0028] 4, combustion-supporting air delivery assembly; 41, combustion-supporting air delivery sub-pipe; 42, combustion-supporting air energy accumulator; 43, combustion-supporting air delivery main pipe;

[0029] 5, voltage stabilizing assembly; 51, flow proportional valve; 52, pulse valve; 53, temperature detector; 54, electrical control;

[0030] 6, magnetic cut-off valve;

[0031] 7, manual butterfly valve;

[0032] 8, flue duct;

[0033] 9, heat exchange assembly; 91, shell; 92, coil;

[0034] 10, blower. DETAILED DESCRIPTION

[0035] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0038] Reference Figure 1 , Figure 2 and Figure 3 The present application provides a kind of annular heating furnace combustion-supporting device, annular heating furnace 1 is divided into multiple heating areas along its circumferential direction, in the example, annular heating furnace is sequentially provided with heating area one, heating area two, heating area three, heating area four and heating area five along the instantaneous needle, at least one ignition nozzle 2 is provided in each heating area, combustion-supporting device includes gas delivery assembly 3 and combustion-supporting air delivery assembly 4.

[0039] Reference Figure 1 , Figure 2 and Figure 3The gas delivery assembly 3 comprises a gas delivery sub-pipe 31, a gas storage device 32 and a gas delivery main pipe 33 for delivering gas to each ignition nozzle 2 respectively. The gas inlet of each gas delivery sub-pipe 31 and the gas outlet of the gas delivery main pipe 33 are in communication with the interior of the gas storage device 32.

[0040] With reference to Figure 1 , Figure 2 and Figure 3 , the combustion air delivery assembly 4 comprises a combustion air delivery sub-pipe 41, a combustion air storage device 42 and a combustion air delivery main pipe 43 for delivering combustion air to each ignition nozzle 2 respectively. The gas inlet of each combustion air delivery sub-pipe 41 and the gas outlet of the combustion air delivery main pipe 43 are in communication with the interior of the combustion air storage device 42.

[0041] With reference to Figure 1 , Figure 2 and Figure 3 , the gas storage device 32 is arranged at the upper end surface of the combustion air storage device 42. Both the gas storage device 32 and the combustion air storage device 42 are sealed boxes with hollow interiors.

[0042] With reference to Figure 1 , Figure 2 and Figure 3 , in operation, the gas is first delivered into the gas storage device 32 through the gas delivery main pipe 33, and then evenly dispersed into each gas delivery sub-pipe 31 through the gas storage device 32. The gas storage device 32 can achieve the effect of pressure equalization and flow distribution during the gas delivery process, so as to ensure that the pressure and flow of the gas entering each gas delivery sub-pipe 31 are the same. The working principle of the combustion air storage device 42 arranged in the combustion air delivery assembly 4 is the same as that of the gas storage device 32 described above. The gas delivered through the gas delivery sub-pipe 31 and the combustion air delivered through the combustion air delivery sub-pipe 41 are mixed and ignited at the ignition nozzle 2, so that the temperature in the furnace is raised to the set temperature, thereby realizing the heating treatment of the products in the annular heating furnace. Therefore, the gas storage device 32 and the combustion air storage device 42 can make the flow and pressure of the gas and the combustion air entering the annular heating furnace 1 more stable, thereby improving the quality of the product processing in the annular heating furnace 1.

[0043] With reference to Figure 1 , Figure 2 and Figure 3The stable pressure assembly 5 is arranged at each ignition nozzle 2, and comprises a flow proportional valve 51 arranged at the gas delivery branch pipe 31 for delivering gas to the ignition nozzle 2, a pulse valve 52 arranged at the combustion-supporting air delivery branch pipe 41 for delivering combustion-supporting air to the ignition nozzle 2, a temperature detector 53 arranged on the annular heating furnace 1 for detecting the temperature in the heating area, and an electrical control device 54. The signal receiving end of the flow proportional valve 51 and the signal receiving end of the pulse valve 52 are connected with the signal output end of the electrical control device 54, and the signal delivery end of the temperature detector 53 is connected with the signal receiving end of the electrical control device 54. In operation, the flow proportional valve 51 is controlled by the electrical control device 54 to adjust the flow rate and pressure of the gas to meet the actual working requirements. When the temperature detector 53 detects that the temperature in the annular heating furnace 1 does not meet the working requirements, the size of the pulse valve 52 on the combustion-supporting air delivery branch pipe 41 is controlled by the electrical control device 54 to control the flow rate and pressure of the combustion-supporting air, so as to control the temperature in the furnace and ensure the stability of the temperature in the furnace and improve the processing quality of the product.

[0044] With reference to Figure 1 , Figure 2 and Figure 3 , the gas delivery branch pipe 31 is further provided with an electromagnetic cut-off valve 6, and the signal receiving end of the electromagnetic cut-off valve 6 is connected with the signal output end of the electrical control device 54. When an abnormal temperature in the furnace is detected, the electromagnetic cut-off valve 6 is controlled by the electrical control device 54 to be closed, so as to stop the delivery of the gas into the annular heating furnace 1, thereby playing a protection role. The combustion-supporting air delivery branch pipe 41 is further provided with a manual butterfly valve 7, which can be manually closed.

[0045] With reference to Figures 1-4 , the annular heating furnace 1 further comprises a smoke exhaust pipe 8 for exhausting the smoke generated in the furnace, and the smoke exhaust pipe 8 is provided with a heat exchange assembly 9. The heat exchange assembly 9 comprises a housing 91 arranged on the smoke exhaust pipe 8 and in communication with the smoke exhaust pipe 8, and at least one coil 92 arranged in the housing 91. The housing 91 is a closed container, the gas inlet of the coil 92 extends out of the housing 91 and is in communication with an external air blower 10, and the gas outlet of the coil 92 also extends out of the housing 91 and is in communication with the air inlet of the combustion-supporting air delivery main pipe 43.

[0046] With reference to Figures 1-4Since the temperature of the flue gas discharged from the flue gas duct 8 is high, the combustion-supporting air entering the ignition nozzle 2 can be heated in advance by arranging the heat exchange assembly 9 on the flue gas duct 8, the temperature difference of the combustion-supporting air entering the furnace is reduced, the stability of the temperature in the furnace is ensured, the waste flue gas waste heat can be utilized, and energy is saved. In the example, the number of the coils 92 is two, the two coils 92 are arranged in series, the air inlet of one of the coils 92 is communicated with the air blower 10, the air outlet of one of the coils 92 is communicated with the air inlet of the other coil 92, and the air outlet of the other coil 92 is communicated with the air inlet of the combustion-supporting air delivery main pipe 43. By arranging the two coils 92, the time of the combustion-supporting air flowing in the heat exchange assembly 9 is prolonged, and the combustion-supporting air can be heated sufficiently.

[0047] In summary: the flow and pressure of the fuel gas and the combustion-supporting air entering the annular heating furnace 1 can be stabilized by arranging the fuel gas accumulator 32 and the combustion-supporting air accumulator 42, the quality of the product processing by the annular heating furnace 1 is improved, the temperature in the furnace can be controlled by the pressure stabilizing assembly 5, the stability of the temperature in the furnace is ensured, and the quality of the product processing is improved. The combustion-supporting air entering the ignition nozzle 2 can be heated in advance by arranging the heat exchange assembly 9 on the flue gas duct 8, the stability of the temperature in the furnace is ensured, the waste flue gas waste heat can be utilized, and energy is saved.

[0048] The above examples are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable the person skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application, any equivalent change or modification according to the spirit and essence of the present application should be covered in the protection scope of the present application.

Claims

1. A combustion-supporting device for an annular heating furnace, wherein the annular heating furnace is divided into multiple heating zones along its circumference, and each heating zone is provided with at least one ignition nozzle, characterized in that, Combustion-supporting devices include: A gas delivery assembly includes a gas delivery branch pipe, a gas storage device, and a gas delivery main pipe for delivering gas to each of the ignition nozzles, wherein the inlet of each gas delivery branch pipe and the outlet of the gas delivery main pipe are both connected to the interior of the gas storage device. A combustion air delivery assembly includes combustion air delivery branch pipes for delivering combustion air to each of the ignition nozzles, a combustion air storage device, and a combustion air delivery main pipe. The air inlet of each combustion air delivery branch pipe and the air outlet of the combustion air delivery main pipe are both connected to the interior of the combustion air storage device. The gas energy storage device is located on the upper surface of the combustion-supporting air energy storage device. Both the gas energy storage device and the combustion-supporting air energy storage device are sealed boxes with a hollow internal structure.

2. The combustion aid device for the annular heating furnace according to claim 1, characterized in that, Each ignition nozzle is equipped with a pressure stabilizing component, which includes a flow proportional valve at the outlet of the gas delivery branch pipe that supplies gas to the ignition nozzle, a pulse valve at the outlet of the combustion air delivery branch pipe that supplies combustion air to the ignition nozzle, a temperature detector, and an electrical control component. The temperature detector is installed on the annular heating furnace to detect the temperature in the heating area. The signal receiving terminals of the flow proportional valve and the pulse valve are both connected to the signal output terminal of the electrical control component, and the signal transmitting terminal of the temperature detector is connected to the signal receiving terminal of the electrical control component.

3. The combustion aid device for the annular heating furnace according to claim 2, characterized in that, An electromagnetic shut-off valve is also installed at the gas outlet end of the gas transmission branch pipe, and the signal receiving end of the electromagnetic shut-off valve is connected to the signal output end of the electrical control component.

4. The combustion aid device for the annular heating furnace according to claim 2 or 3, characterized in that, The outlet end of the combustion air delivery branch pipe is also equipped with a manual butterfly valve.

5. The combustion aid device for the annular heating furnace according to claim 4, characterized in that, The annular heating furnace also includes a flue for discharging the smoke generated inside. A heat exchange assembly is provided on the flue, and the heat exchange assembly includes a closed shell disposed on and connected to the flue and at least one coil disposed within the shell. The shell is a closed container. The air inlet of the coil extends out of the shell and is connected to a blower. The air outlet of the coil also extends out of the shell and is connected to the inlet of the combustion air supply main.

6. The combustion aid device for the annular heating furnace according to claim 5, characterized in that, The number of coils is two, and the two coils are connected in series.

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