Bottom air inducing and preheating structure of vertical kiln

Abstract

The utility model discloses a vertical kiln bottom induced air preheating structure which comprises a kiln body, a preheater is arranged on one side of the kiln body, a first air inlet is fixedly formed in the surface of one side of the preheater, one end of the first air inlet is in threaded connection with a supporting cylinder, and a filter screen is installed at the end of the supporting cylinder. An air extractor is installed on the top face of the preheater, the air inlet end of the air extractor communicates with the preheater, a first air pipe is installed at the air outlet end of the air extractor, a smoke exhaust pipe is installed on the top of the kiln body, and a preheating pipe is arranged in the smoke exhaust pipe in a surrounding mode. According to the air exhauster, the filter screen is arranged and installed at the end of the supporting cylinder, the supporting cylinder is in threaded connection with the first air inlet, the filter screen can filter sucked air, the phenomenon that the air exhauster is damaged by impurities is avoided, meanwhile, due to the detachable design, the filter screen is convenient to disassemble, maintain and replace, operation is easy and convenient, time and labor are saved, and the air exhauster is suitable for popularization and application. The device is high in practicability and worthy of popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of kiln equipment, in particular to a bottom draft preheating structure of a vertical kiln. Background Art

[0002] A kiln is a device built with refractory materials (usually bricks or stones) and used to fire products. It is often used when firing ceramic objects or processing some mechanical parts. According to the type of materials fired, it can be divided into ceramic kilns, cement kilns, glass kilns, etc. At the same time, according to the different heating materials used in the kiln, the kiln can be divided into electric kilns, combustible gas kilns and oil kilns. Electric kilns are widely used due to their advantages of faster temperature rise and high temperature reliability.

[0003] The existing technology has the following problems:

[0004] After extensive searching, it was found that Chinese Patent Publication No.: CN219776317U discloses a kiln furnace preheating structure. This patent generates negative pressure at the air inlet pipe through the movement of the vacuum fan, and the outside air is passed into the heat exchanger. The heat exchanger heats the air and sends it into the kiln body to achieve preheating. However, there are still some problems in the actual use of the above patent. The most obvious one is that the outside air is directly drawn into the heat exchanger without being filtered, causing impurities in the air to damage the vacuum fan.

[0005] To this end, we proposed a vertical kiln bottom induced draft preheating structure to solve the above-mentioned drawbacks. Utility Model Content

[0006] The utility model aims to solve the shortcomings of the prior art and proposes a vertical kiln bottom induced draft preheating structure.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a bottom induced draft preheating structure of a vertical kiln, comprising a kiln body, a preheater is arranged on one side of the kiln body, and a first air inlet is fixedly installed on the surface of one side of the preheater, one end of the first air inlet is threadedly connected to a support tube, and a filter is installed on the end of the support tube, an exhaust fan is installed on the top surface of the preheater, and the air inlet end of the exhaust fan is connected with the preheater, and a first air pipe is installed on the air outlet end of the exhaust fan, a smoke exhaust pipe is installed on the top of the kiln body, and a preheating pipe is arranged around the interior of the smoke exhaust pipe, one end of the first air pipe is connected with one end of the preheating pipe, and the other end of the preheating pipe is connected with a second air pipe, an air outlet pipe is arranged at the lower part of the interior of the kiln body, and an air outlet nozzle is fixedly installed on the surface of the air outlet pipe, a through hole is opened at the position corresponding to the air outlet nozzle on the inner bottom surface of the kiln body, and the other end of the second air pipe is connected with the air outlet pipe, a circulating air duct is arranged inside the kiln body, and the second air inlet and air outlet are respectively installed on the top surface and side surface of the circulating air duct.

[0008] Preferably, there are a plurality of the gas outlet pipes, and the plurality of gas outlet pipes are equidistantly distributed at the lower part of the kiln body, and the plurality of gas outlet pipes are connected through pipelines.

[0009] Preferably, there are multiple air outlets, and the multiple air outlets are equidistantly distributed on the circulating air duct.

[0010] Preferably, a plurality of the air outlet nozzles are provided, and the plurality of air outlet nozzles are equidistantly distributed on the surface of the air outlet pipe.

[0011] Preferably, a control panel is fixedly mounted on the outer wall of the kiln body, and the control panel is electrically connected to the exhaust fan via a wire.

[0012] Preferably, the diameter of the preheating pipe is smaller than the diameter of the smoke exhaust pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, a filter is provided, which is installed at the end of the support tube, and the support tube is threadedly connected to the first air inlet. The filter can filter the inhaled air to prevent impurities from damaging the air extractor. At the same time, the detachable design facilitates the disassembly, maintenance and replacement of the filter, and the operation is simple and convenient, saving time and effort, and has strong practicality, so it is worthy of promotion.

[0015] 2. In the utility model, by arranging the preheating pipe in the exhaust pipe of the kiln body, the high-temperature flue gas discharged from the kiln body can be used to preheat the air, which can not only reduce the energy used in the air preheating process, but also can utilize the high-temperature flue gas discharged from the kiln body, killing two birds with one stone. In addition, with the cooperation of the preheater, the air can be preheated for a second time, and the preheating effect of the air is ideal and the preheating efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 This is a structural schematic diagram of the vertical kiln bottom induced draft preheating structure proposed by the utility model;

[0018] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0019] Figure 3 It is a schematic diagram of the structure of the air outlet pipe and the air outlet nozzle.

[0020] Legend:

[0021] 1. Kiln body; 2. Preheater; 3. First air inlet; 4. Support tube; 5. Filter; 6. Vacuum fan; 7. First air pipe; 8. Preheating pipe; 9. Second air pipe; 10. Air outlet pipe; 11. Air outlet nozzle; 12. Through hole; 13. Circulating air duct; 14. Second air inlet; 15. Air outlet; 16. Smoke exhaust pipe; 17. Control surface. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Please refer to Figure 1-3The bottom draft preheating structure of the vertical kiln comprises a kiln body 1, a preheater 2 is arranged on one side of the kiln body 1, and a first air inlet 3 is fixedly installed on the surface of one side of the preheater 2, one end of the first air inlet 3 is threadedly connected with a support tube 4, and a filter screen 5 is installed at the end of the support tube 4, an exhaust fan 6 is installed on the top surface of the preheater 2, and the air inlet end of the exhaust fan 6 is connected with the preheater 2, and the air outlet end of the exhaust fan 6 is installed with a first air pipe 7, and a smoke exhaust pipe 16 is installed on the top of the kiln body 1, and the interior of the smoke exhaust pipe 16 is surrounded by A preheating pipe 8, one end of the first air pipe 7 is connected to one end of the preheating pipe 8, the other end of the preheating pipe 8 is connected to the second air pipe 9, an air outlet pipe 10 is arranged at the lower part of the interior of the kiln body 1, and an air outlet nozzle 11 is fixedly installed on the surface of the air outlet pipe 10, a through hole 12 is opened at the position of the inner bottom surface of the kiln body 1 corresponding to the air outlet nozzle 11, the other end of the second air pipe 9 is connected to the air outlet pipe 10, a circulating air duct 13 is arranged inside the kiln body 1, and a second air inlet 14 and an air outlet 15 are respectively installed on the top surface and the side surface of the circulating air duct 13.

[0025] When in use, the vacuum fan 6 works, negative pressure is generated at the first air inlet 3, and the outside air is introduced into the preheater 2. The preheater 2 heats the air, and the vacuum fan 6 continues to work. The vacuum fan 6 sends the heated air to the preheating pipe 8. By arranging the preheater 2 in the exhaust pipe 16 of the kiln body 1, the high-temperature flue gas exhausted from the kiln body 1 can be used to preheat the air, which can not only reduce the energy used in the air preheating process, but also can utilize the high-temperature flue gas exhausted from the kiln body 1, killing two birds with one stone, and in cooperation with the preheater 2 The air can be preheated for a second time, the preheating effect of the air is ideal, the preheating efficiency is high, and finally the preheated air can be ejected from the air outlet nozzle 11 on the surface of the air outlet pipe 10. Secondly, the filter screen 5 is installed at the end of the support tube 4, and the support tube 4 is threadedly connected to the first air inlet 3. The filter screen 5 can filter the inhaled air to prevent impurities from causing damage to the air pump 6. At the same time, the detachable design makes it easy to disassemble, maintain and replace the filter screen 5, and the operation is simple and convenient, saving time and effort, and has strong practicality, and is worthy of promotion.

[0026] In this embodiment, a plurality of gas outlet pipes 10 are provided, and the plurality of gas outlet pipes 10 are evenly distributed at the lower part of the kiln body 1 , and the plurality of gas outlet pipes 10 are connected to each other through pipelines.

[0027] Specifically, the air output volume of the preheated air is increased, thereby improving the preheating utilization efficiency.

[0028] In this embodiment, a plurality of air outlets 15 are provided, and the plurality of air outlets 15 are evenly distributed on the circulation air duct 13 .

[0029] Specifically, the preheated air can heat the raw materials in the kiln body 1 .

[0030] In this embodiment, a plurality of air outlet nozzles 11 are provided, and the plurality of air outlet nozzles 11 are evenly distributed on the surface of the air outlet pipe 10 .

[0031] Specifically, the heating effect and efficiency of the material are improved.

[0032] In this embodiment: a control panel 17 is fixedly mounted on the outer wall of the kiln body 1 , and the control panel 17 is electrically connected to the exhaust fan 6 via a wire.

[0033] Specifically, it is a common circuit connection structure, which will not be described in detail here.

[0034] In this embodiment, the diameter of the preheating tube 8 is smaller than the diameter of the smoke exhaust pipe 16 .

[0035] Specifically, the preheating pipe 8 can be installed inside the smoke exhaust pipe 16 .

[0036] In this embodiment: the controller is an existing structure, and the control circuit can be implemented by simple programming by technicians in this field. It belongs to the common knowledge in this field. It is only used without modification, so the control method and circuit connection are not described in detail.

[0037] Working principle: When in use, the vacuum fan 6 works, negative pressure is generated at the first air inlet 3, and the outside air is introduced into the preheater 2. The preheater 2 heats the air, and the vacuum fan 6 continues to work. The vacuum fan 6 sends the heated air to the preheating pipe 8. By arranging the preheater 2 in the exhaust pipe 16 of the kiln body 1, the high-temperature flue gas discharged from the kiln body 1 can be used to preheat the air, which can not only reduce the energy used in the air preheating process, but also can utilize the high-temperature flue gas discharged from the kiln body 1, killing two birds with one stone, and in the preheater 2 With the cooperation of , the air can be preheated for a second time, the preheating effect of the air is ideal, the preheating efficiency is high, and finally the preheated air is ejected from the air outlet nozzle 11 on the surface of the air outlet pipe 10. Secondly, the filter screen 5 is installed at the end of the support tube 4, and the support tube 4 is threadedly connected to the first air inlet 3. The filter screen 5 can filter the inhaled air to prevent impurities from causing damage to the air pump 6. At the same time, the detachable design is convenient for disassembly, maintenance and replacement of the filter screen 5, and the operation is simple and convenient, saving time and effort, and has strong practicality, and is worthy of promotion.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vertical kiln bottom induced draft preheating structure, comprising a kiln body (1), characterized in that: A preheater (2) is provided on one side of the kiln body (1), and a first air inlet (3) is fixedly installed on the surface of one side of the preheater (2); one end of the first air inlet (3) is threadedly connected to a support tube (4), and a filter screen (5) is installed at the end of the support tube (4); an exhaust fan (6) is installed on the top surface of the preheater (2), and the air inlet end of the exhaust fan (6) is connected to the preheater (2); a first air pipe (7) is installed at the air outlet end of the exhaust fan (6); a smoke exhaust pipe (16) is installed on the top of the kiln body (1), and a preheating pipe (8) is arranged around the inside of the smoke exhaust pipe (16); the first air pipe One end of the kiln body (7) is connected to one end of the preheating pipe (8), the other end of the preheating pipe (8) is connected to the second air pipe (9), an air outlet pipe (10) is arranged at the lower part of the interior of the kiln body (1), and an air outlet nozzle (11) is fixedly installed on the surface of the air outlet pipe (10), a through hole (12) is opened at the position of the inner bottom surface of the kiln body (1) corresponding to the air outlet nozzle (11), the other end of the second air pipe (9) is connected to the air outlet pipe (10), a circulating air duct (13) is arranged inside the kiln body (1), and a second air inlet (14) and an air outlet (15) are respectively installed on the top surface and side surface of the circulating air duct (13).

2. The vertical kiln bottom induced draft preheating structure according to claim 1, characterized in that: A plurality of the gas outlet pipes (10) are provided, and the plurality of gas outlet pipes (10) are evenly distributed at a lower portion of the interior of the kiln body (1), and the plurality of gas outlet pipes (10) are connected to each other via pipelines.

3. The vertical kiln bottom induced draft preheating structure according to claim 1, characterized in that: A plurality of air outlets (15) are provided, and the plurality of air outlets (15) are evenly distributed on the circulation air duct (13).

4. The vertical kiln bottom induced draft preheating structure according to claim 1, characterized in that: A plurality of the air outlet nozzles (11) are provided, and the plurality of air outlet nozzles (11) are distributed at equal intervals on the surface of the air outlet pipe (10).

5. The vertical kiln bottom induced draft preheating structure according to claim 1, characterized in that: A control panel (17) is fixedly mounted on the outer wall of the kiln body (1), and the control panel (17) is electrically connected to the air extractor (6) via a wire.

6. The vertical kiln bottom induced draft preheating structure according to claim 1, characterized in that: The diameter of the preheating pipe (8) is smaller than the diameter of the smoke exhaust pipe (16).

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