Energy-saving burner for kiln low-temperature thermal cycle

Abstract

This utility model relates to the field of kiln burner technology, and in particular to a low-temperature thermal circulation energy-saving burner for kilns. It includes a burner tube, with a combustion air duct on the upper outer side of the burner tube and a connecting block on one side. An electrode post is horizontally installed through the upper and lower parts of one side of the connecting block, and an air inlet pipe is installed through the outer end of the connecting block. Combustible gas can enter through the air inlet pipe and then exit through the outlet of the nozzle, while the combustion-supporting gas can exit through the outlet of the combustion air disc, thus achieving effective mixing and more complete combustion. Furthermore, the temperature-regulating air duct is connected to the flue gas denitrification exhaust gas pipe via a secondary valve, allowing the denitrified exhaust gas to enter the kiln and be absorbed by the product, reducing the time required for complete product combustion and effectively saving ammonia and energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of kiln burner technology, specifically to a low-temperature thermal cycle energy-saving burner for kilns. Background Technology

[0002] Kiln burners are combustion devices used in industrial kilns, primarily serving to distribute fuel and combustion air, and then inject them for combustion. Because natural gas is clean and efficient, modern kilns generally use it as fuel. Natural gas has a wide combustion temperature range, typically between 500-2300℃. Therefore, temperature control with ordinary burners is difficult below 500℃, requiring the use of temperature-regulating burners. Temperature-regulating burners operate on a secondary air-based temperature control principle and are mainly used in intermittent kilns to meet the heating requirements of certain products.

[0003] During the design process of this utility model, the following problems were discovered in the existing technology:

[0004] While the common practice of blowing secondary air into the burner of a kiln to cool the flame achieves the requirement for low-temperature control, it increases energy consumption and the amount of exhaust gas that needs to be treated, thereby further increasing the cost of use. Utility Model Content

[0005] The purpose of this invention is to provide a low-temperature thermal circulation energy-saving burner for kilns, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature thermal circulation energy-saving burner for kilns, comprising a burner tube, a combustion air duct provided on the upper outer side of the burner tube, a connecting block provided on one side of the burner tube, an electrode post horizontally installed through the upper and lower parts of one side of the connecting block, an air inlet pipe installed through one end of the connecting block, a fixing plate fixedly connected to the outer side of the burner tube on the side of the combustion air duct, a connecting pipe bolted and nut connected to the outer side of the burner tube on the side of the fixing plate, a temperature regulating air duct provided on the upper outer side of the connecting pipe, and a burner brick bolted and nut connected to the outer side of the burner tube on the side of the connecting pipe.

[0007] The beneficial effects of this utility model are as follows: the gas can enter through the inlet pipe and then be discharged through the outlet of the nozzle, while the combustion-supporting gas can be discharged through the outlet of the combustion-supporting air plate, thus achieving effective mixing and being ignited at one end of the electrode column, making the gas combustion more complete and increasing the combustion efficiency. Furthermore, the temperature-regulating air duct is connected to the flue gas denitrification exhaust gas duct through the auxiliary valve, allowing the exhaust gas after flue gas denitrification to enter the kiln and be absorbed by the product. Since the treated flue gas has a certain temperature, the time required for the product to complete combustion can be reduced. Moreover, since the exhaust gas is treated flue gas with a low oxygen content, the amount of denitrification treatment can be reduced, effectively saving ammonia water consumption and energy consumption.

[0008] To ensure more complete combustion of natural gas:

[0009] Further configuration: a nozzle is provided on one side of the air inlet pipe, and a number of air outlet holes are evenly opened on one side of the nozzle; a combustion air plate is provided on the inner side of the burner pipe, and a number of air outlet holes are evenly opened on the combustion air plate; the air inlet pipe and the electrode post are both horizontally installed through one side of the combustion air plate.

[0010] By adopting the above technical solution, the gas can enter through the air inlet pipe and then be discharged through the air outlet of the nozzle, while the combustion-supporting gas can be discharged through the air outlet of the combustion-supporting fan, thus achieving effective mixing and being ignited at one end of the electrode column, making the gas combustion more complete and increasing the combustion efficiency.

[0011] To ensure that the combustion-supporting gas can be smoothly mixed with the gas:

[0012] Further configuration: The combustion air duct is connected to the combustion gas pipe via a main valve.

[0013] By adopting the above technical solution, when the main valve is opened, the combustion-supporting gas can enter the burner tube through the combustion-supporting air duct, and then mix with the gas sprayed from the nozzle, so that subsequent combustion can be carried out.

[0014] To achieve adjustable heat sealing temperature and reduced energy consumption:

[0015] Further configuration: The temperature-regulating air duct is connected to the flue gas denitrification exhaust gas duct via a secondary valve.

[0016] By adopting the above technical solution, the exhaust gas after flue gas denitrification can enter the kiln and be absorbed by the product. Since the treated flue gas has a certain temperature, the time required for the product to complete combustion can be reduced. Furthermore, since the exhaust gas is treated flue gas with a low oxygen content, the amount of denitrification treatment can be reduced, which can effectively save the consumption of ammonia water and energy. At the same time, the hot air temperature can be adjusted by adjusting the combustion air volume.

[0017] To increase the flame ejection speed:

[0018] A further feature is provided: a combustion chamber is provided on the inner side of the burner brick.

[0019] By adopting the above technical solution, the design of the combustion chamber narrowing structure can further improve the mixing effect of flame and temperature regulating air, while increasing the flame ejection speed, increasing the airflow stirring effect in the kiln, and reducing the temperature difference.

[0020] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0021] Figure 1 This is a front view schematic diagram of the present invention;

[0022] Figure 2 This is a side view of the exploded view of this utility model;

[0023] Figure 3 This is a schematic diagram of the front cross-section of this utility model.

[0024] In the diagram: 1. Burner tube; 2. Combustion air duct; 3. Connecting block; 4. Electrode post; 5. Air inlet pipe; 6. Fixing plate; 7. Connecting pipe; 8. Temperature regulating air duct; 9. Burner brick; 10. Nozzle; 11. Combustion air coil; 12. Combustion chamber. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0026] Please see Figures 1 to 3The kiln low-temperature thermal circulation energy-saving burner includes a burner tube 1, a combustion air duct 2 on the upper side of the burner tube 1, a connecting block 3 on one side of the burner tube 1, an electrode post 4 horizontally installed through the upper and lower parts of one side of the connecting block 3, an air inlet pipe 5 installed through one end of the connecting block 3, a fixing plate 6 fixedly connected to the outside of the burner tube 1 on the side of the combustion air duct 2, a connecting pipe 7 connected to the outside of the burner tube 1 on the side of the fixing plate 6 with bolts and nuts, a temperature regulating air duct 8 on the upper side of the connecting pipe 7, and a burner brick 9 connected to the outside of the burner tube 1 on the side of the connecting pipe 7 with bolts and nuts.

[0027] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, a nozzle 10 is provided on one side of the air inlet pipe 5, and several air outlet holes are evenly opened on one side of the nozzle 10. A combustion air plate 11 is provided on the inner side of the burner pipe 1, and several air outlet holes are evenly opened on the combustion air plate 11. The air inlet pipe 5 and the electrode post 4 are both horizontally installed on one side of the combustion air plate 11.

[0028] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the combustion air duct 2 is connected to the combustion gas duct via a main valve.

[0029] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the temperature-regulating air duct 8 is connected to the flue gas denitrification exhaust gas duct via a secondary valve.

[0030] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, a combustion chamber 12 is provided on the inner side of the burner brick 9.

[0031] The working process of the low-temperature thermal circulation energy-saving burner in this kiln is as follows:

[0032] First, connect the burner control box to the electrode post 4. Connect the combustion air duct 2 to the combustion gas pipe via the main valve. Connect the temperature regulating air duct 8 to the flue gas denitrification exhaust gas pipe via the auxiliary valve. At this time, turn on the ignition switch. An electric arc will be generated on one side of the electrode post 4. Simultaneously, gas can be introduced through the air inlet pipe 5. Then, open the main valve to allow the combustion gas to enter the burner tube 1 through the combustion air duct 2 and be discharged through the air outlet of the combustion air disc 11. The gas will be discharged through the air outlet of the nozzle 10. At this time, the gas will react with the combustion gas. The mixture is thoroughly mixed and ignited at the arc of electrode post 4, then ejected through burner tube 1. At this time, the auxiliary valve can be opened, allowing the flue gas denitrification exhaust gas to enter the outside of burner tube 1 and the inside of combustion chamber 12 through temperature regulating air duct 8, thereby entering the kiln through combustion chamber 12 to heat the product. Since the combustion chamber 12 inside burner brick 9 adopts a narrowing structure, it can improve the mixing effect of flame and flue gas denitrification exhaust gas, while also increasing the flame ejection speed and increasing the airflow stirring effect in the kiln, effectively improving the combustion efficiency of the product.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A low-temperature thermal circulation energy-saving burner for kilns, characterized in that: The device includes a burner tube (1), a combustion air duct (2) on the upper side of the burner tube (1), a connecting block (3) on one side of the burner tube (1), an electrode post (4) horizontally installed on the upper and lower parts of one side of the connecting block (3), an air inlet pipe (5) installed on one end of the outer side of the connecting block (3), a fixing plate (6) fixedly connected to the outer side of the burner tube (1) on the side of the combustion air duct (2), a connecting pipe (7) connected to the outer side of the burner tube (1) on the side of the fixing plate (6) by bolts and nuts, a temperature regulating air duct (8) on the upper side of the outer side of the connecting pipe (7), and a burner brick (9) connected to the outer side of the burner tube (1) on the side of the connecting pipe (7) by bolts and nuts.

2. The kiln low-temperature thermal circulation energy-saving burner as described in claim 1, characterized in that: The air inlet pipe (5) is provided with a nozzle (10) on one side, and a number of air outlet holes are evenly opened on one side of the nozzle (10). The burner pipe (1) is provided with a combustion air plate (11) on the inner side, and a number of air outlet holes are evenly opened on the combustion air plate (11). The air inlet pipe (5) and the electrode post (4) are both horizontally installed on one side of the combustion air plate (11).

3. The kiln low-temperature thermal circulation energy-saving burner as described in claim 1, characterized in that: The combustion air duct (2) is connected to the combustion gas duct via a main valve.

4. The kiln low-temperature thermal circulation energy-saving burner as described in claim 1, characterized in that: The temperature-regulating air duct (8) is connected to the flue gas denitrification exhaust gas duct via a secondary valve.

5. The kiln low-temperature thermal circulation energy-saving burner as described in claim 1, characterized in that: The burner brick (9) has a combustion chamber (12) on its inner side.

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