Kiln structure with air curtain formed at kiln opening
By forming an air curtain in the front section of the kiln, and using high-temperature air induction fans and blower branches to output high-temperature flue gas, the problem of cold air entering during rapid heating of traditional kilns is solved, and the rapid and uniform heating of the front section of the kiln and the blank mass is achieved. promote.
Patent Information
- Application Number
- CN202420484238.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-12
AI Technical Summary
When the traditional roller kiln heats up rapidly in the front section of the kiln, cold air outside the kiln is prone to enter the kiln, resulting in a decrease in the heating rate and may cause defects such as body cracks and brick blowing.
A high-temperature induced air fan is used to output the high-temperature flue gas from the high-temperature zone of the kiln to the blower pipe through the air duct, and output it to the front section of the kiln through the blower branch pipe, forming an air curtain to prevent cold air from entering.
The rapid heating of the front section of the kiln is achieved, and a cold air is prevented from entering by forming an air curtain, which avoids the decrease in the heating rate and the occurrence of body defects.
Smart Images
Figure CN222460300U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of kilns, in particular to a kiln structure with an air curtain formed at a kiln opening. Background Art
[0002] Tiles in the building ceramics industry are generally fired in roller kilns; in traditional roller kilns, the temperature of the front end of the roller kiln is raised by the smoke exhaust fan sucking the smoke from the middle and rear sections of the kiln. Therefore, the temperature of the front section of the traditional roller kiln is relatively low; the temperature of the front end of the roller kiln is generally 50-200 degrees Celsius at the beginning, and then slowly rises. As the kiln roller transmission speed increases, if the front temperature of the kiln is increased by simply increasing the suction force of the smoke exhaust fan, the temperature difference between the surrounding and the middle of the blank will increase during the heating process of the front end of the roller kiln, resulting in the phenomenon of excessive local heating, which will make the blank very prone to cracks, brick explosion and other defects. At the same time, the front end of the roller kiln mainly draws in the high-temperature flue gas from the middle and rear sections through negative pressure, so that the high-temperature flue gas is continuously sent to the front end of the kiln; however, the roller kiln uses negative pressure to inhale high-temperature flue gas, which will also cause the air outside the kiln to enter the front end of the kiln, thereby reducing the temperature of the front end of the kiln. In order to reduce the heat at the front end of the kiln, the heating rate of the front end decreases, which is not conducive to the heating of the front end. Utility Model Content
[0003] The purpose of the utility model is to propose a kiln structure for forming an air curtain at the kiln mouth, wherein a high-temperature induced draft fan outputs high-temperature flue gas in the high-temperature zone of the kiln to the induced draft duct through the induced draft duct, and outputs it to a blowing branch pipe extending in the length direction of the kiln body through the induced draft duct, so that the flue gas is output to the front section of the kiln through the blowing branch pipe, which can not only realize rapid heating of the front section of the kiln, but also output the flue gas through the blowing branch pipe at the kiln entrance to form an air curtain.
[0004] To achieve this purpose, the utility model adopts the following technical solutions:
[0005] A kiln structure with an air curtain formed at a kiln opening, comprising: a kiln main body, a fume exhaust assembly and a rapid lifting assembly;
[0006] The kiln main body includes, in sequence along the transmission direction of the high-temperature flue gas: a kiln high-temperature zone, a kiln middle section and a kiln front section;
[0007] The fume exhaust component has an exhaust function, and the air inlet end of the fume exhaust component is connected to the front section of the kiln;
[0008] The rapid lifting assembly includes: an induced draft pipe, a high-temperature induced draft fan, a main blowing pipe, a branch blowing pipe and a branch blowing pipe;
[0009] The input end of the induced draft duct is connected to the high temperature zone of the kiln; the air inlet end of the high temperature induced draft fan is connected to the output end of the induced draft duct, the air outlet end of the high temperature induced draft fan is connected to the input end of the main blowing pipe, and the output end of the main blowing pipe is connected to the branch blowing pipe; the branch blowing pipe extends along the length direction of the kiln body and extends to the kiln entrance at one end of the kiln body; a plurality of branch blowing pipes are arranged in sequence along the length direction of the branch blowing pipe to the kiln entrance; the input end of the branch blowing pipe is connected to the branch blowing pipe, and the output end of the branch blowing pipe is located in the front section of the kiln, and two rows of the branch blowing pipes are symmetrically arranged in the front section of the kiln.
[0010] Preferably, the induced draft duct is provided with a plurality of heat-inducing air outlets along the length direction, and some of the heat-inducing air outlets are arranged along the length direction of the high-temperature zone of the kiln.
[0011] Optimally, the induced draft duct is transversely arranged below the middle of the high temperature zone of the kiln.
[0012] Preferably, the smoke exhaust assembly comprises: a smoke exhaust fan, a smoke exhaust main pipe and a smoke exhaust branch pipe;
[0013] The air inlet end of the smoke exhaust fan is connected to the output end of the smoke exhaust pipe; the multiple input ends of the smoke exhaust pipe are connected to the output end of the smoke exhaust branch pipe, and the input end of the smoke exhaust branch pipe is connected to the front section of the kiln.
[0014] Optimally, the smoke extraction branch pipe is far away from the kiln inlet.
[0015] Preferably, some of the smoke extraction branch pipes are symmetrically arranged at upper and lower positions of the front section of the kiln.
[0016] Optimally, the blowing branch pipes are arranged above and below the front section of the kiln.
[0017] Preferably, the blowing branch pipe is provided with multiple rows of branch pipe air outlets facing different directions.
[0018] It can be optimized to further include: an exhaust gas treatment device;
[0019] The air outlet end of the smoke exhaust assembly is connected to the exhaust gas treatment device.
[0020] Compared with the prior art, one of the above technical solutions has the following beneficial effects:
[0021] The present invention provides a kiln structure for forming an air curtain at a kiln mouth, wherein a high-temperature induced draft fan outputs high-temperature flue gas in a high-temperature zone of the kiln to the induced draft duct via the induced draft duct, and outputs the high-temperature flue gas through the induced draft duct to a blowing branch pipe extending in the length direction of the kiln body, thereby allowing the flue gas to be output to the front section of the kiln via the blowing branch pipe, which can not only achieve rapid heating of the front section of the kiln, but also enable the flue gas to be output through the blowing branch pipe at the kiln entrance to form an air curtain, thereby preventing cold air outside the kiln from entering the kiln, thereby solving the problem of a decrease in the heating rate caused by cold air outside the kiln entering the kiln when the front section of the kiln is rapidly heated. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural schematic diagram of one embodiment of the kiln structure;
[0023] Figure 2 It is a structural schematic diagram of one embodiment of the blowing branch pipe.
[0024] Figure 3 yes Figure 1 Enlarged schematic diagram of part A in the middle.
[0025] in:
[0026] Kiln main body 1, smoke exhaust assembly 2, rapid lifting assembly 3;
[0027] kiln high temperature area 11, kiln middle section 12, kiln front section 13; kiln entrance 14;
[0028] Smoke fan 21, smoking supervisor 22, smoking sub-in-charge 23;
[0029] Induced air duct 31, high temperature induced air fan 32, blowing main pipe 33, blowing branch pipe 34, blowing branch pipe 35;
[0030] Heat duct 311; air blowing branch pipe 351. DETAILED DESCRIPTION
[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0032] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 on the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, which are used to distinguish and describe the features, without distinction of order or importance. In the description of the present utility model, unless otherwise specified, "multiple" means more than two.
[0033] like Figure 1-2 , a kiln structure with an air curtain formed at a kiln opening, comprising: a kiln body 1, a fume exhaust assembly 2 and a fast lifting assembly 3;
[0034] The kiln main body 1 includes, in order along the transmission direction of the high-temperature flue gas: a kiln high-temperature zone 11, a kiln middle section 12 and a kiln front section 13;
[0035] The fume exhaust assembly 2 has an exhaust function, and the air inlet end of the fume exhaust assembly 2 is connected to the kiln front section 13;
[0036] The rapid lifting assembly 3 includes: an induced draft pipe 31, a high temperature induced draft fan 32, an air blowing main pipe 33, an air blowing branch pipe 34 and an air blowing branch pipe 35;
[0037] The input end of the induced draft duct 31 is connected to the high temperature zone 11 of the kiln; the air inlet end of the high temperature induced draft fan 32 is connected to the output end of the induced draft duct 31, the air outlet end of the high temperature induced draft fan 32 is connected to the input end of the blowing main pipe 33, and the output end of the blowing main pipe 33 is connected to the blowing branch pipe 34; the blowing branch pipe 34 extends along the length direction of the kiln body 1 and extends to the kiln entrance 14 at one end of the kiln body 1; a plurality of blowing branch pipes 35 are arranged in sequence along the length direction of the blowing branch pipe 34 to the kiln entrance 14; the input end of the blowing branch pipe 35 is connected to the blowing branch pipe 34, and the output end of the blowing branch pipe 35 is located in the front section 13 of the kiln, and two rows of the blowing branch pipes 35 are symmetrically arranged in the front section 13 of the kiln.
[0038] The present solution provides a kiln structure that forms an air curtain at the kiln mouth, wherein a high-temperature induced draft fan 32 outputs high-temperature flue gas from the high-temperature zone 11 of the kiln to the induced draft duct 31 through the induced draft duct 31, and outputs the high-temperature flue gas through the induced draft duct 31 to the blowing branch pipe 34 extending in the length direction of the kiln body 1, so that the flue gas is output to the front section 13 of the kiln through the blowing branch pipe 35, which can not only achieve rapid heating of the front section 13 of the kiln, but also output the flue gas through the blowing branch pipe 35 at the kiln inlet 14 to form an air curtain, thereby preventing cold air outside the kiln from entering the kiln, solving the problem of a decrease in the heating rate caused by cold air outside the kiln entering the kiln when the front section 13 of the kiln is rapidly heated.
[0039] Specifically, the high temperature zone 11 of the kiln is the location where the high temperature flue gas is generated by the kiln body 1, and the input end of the flue gas exhaust component 2 is connected to the front section 13 of the kiln; the flue gas exhaust component 2 has an exhaust function for the flue gas in the front section 13 of the kiln, thereby extracting the flue gas from the inside of the kiln body 1, thereby driving the high temperature flue gas to be transmitted from the high temperature zone 11 of the kiln to the middle section 12 of the kiln and the front section 13 of the kiln in sequence, thereby heating the front section 13 of the kiln; at the same time, the present scheme is also provided with a fast lifting component 3, after the high temperature induced draft fan 32 is started, the high temperature flue gas in the high temperature zone 11 of the kiln can be output to the induced draft duct 31, thereby outputting the high temperature flue gas in the induced draft duct 31 to the blowing pipe 33, and the blowing pipe 33 then transmits the high temperature flue gas ... The air is output to the blowing branch pipe 34; the blowing branch pipe 34 extends along the length direction of the kiln body 1, and one end of the blowing branch pipe 34 can extend to the kiln inlet 14 at one end of the kiln body 1; when the blowing branch pipes 35 are arranged in sequence along the length direction of the blowing branch pipes 34, some of the blowing branch pipes 35 can be arranged to the kiln inlet 14; the blowing branch pipe 34 can output the high-temperature flue gas to the blowing branch pipe 35, and then output it to the front section 13 of the kiln through the blowing branch pipe 35; in this way, under the action of the high-temperature induced draft fan 32, the high-temperature flue gas in the high-temperature zone 11 of the kiln is output to the front section 13 of the kiln along the induced draft pipe 31, the blowing main pipe 33, the blowing branch pipe 34 and the blowing branch pipe 35, so that the front section 13 of the kiln can be quickly heated up. Furthermore, two rows of blowing branches 35 are symmetrically arranged at the front section 13 of the kiln, and the symmetrical distribution can be vertically symmetrical or horizontally symmetrical; when the blowing branches 35 are symmetrically distributed, the blowing branches 35 can output high-temperature flue gas in opposite directions, thereby forming an air curtain at the kiln inlet 14, and the air curtain can fill the kiln inlet 14, which can isolate the air outside the kiln body 1, thereby preventing the outside air from entering the kiln inlet 14 to reduce the temperature of the kiln body 1. In this way, part of the flue gas output from the high temperature zone 11 of the kiln passes through the high temperature zone 11 of the kiln, the middle section 12 of the kiln and the front section 13 of the kiln in sequence, and part of the flue gas is output from the induced draft pipe 31 through the blowing main pipe 33, the blowing branch pipe 34 and the blowing branch pipe 35 to the front section 13 of the kiln, and the flue gas is transported to the front section 13 of the kiln in multiple channels, thereby increasing the flow rate of the flue gas.
[0040] The smoke exhaust assembly 2 is a well-known mechanism with an exhaust function, and only needs to utilize negative pressure to exhaust the smoke from the front section 13 of the kiln.
[0041] Optimally, the air duct 31 is provided with a plurality of heat-inducing air ports 311 along the length direction, and some of the heat-inducing air ports 311 are arranged along the length direction of the high-temperature zone 11 of the kiln.
[0042] The draft duct 31 of the present scheme is preferably provided with a plurality of heat ducting air outlets 311, which can inhale high-temperature flue gas at different positions of the high-temperature zone 11 of the kiln, thereby inputting the high-temperature flue gas at different positions into the draft duct 31, and outputting it to the blowing main pipe 33 under the action of the high-temperature draft fan 32, and then outputting it to different positions of the front section 13 of the kiln through the blowing branch pipe 34.
[0043] Optimally, the induced draft duct 31 is transversely arranged below the middle of the high temperature zone 11 of the kiln.
[0044] The induced draft duct 31 is preferably arranged below the middle of the high temperature zone 11 of the kiln. The induced draft duct 31 will suck in the high temperature flue gas below the middle of the high temperature zone 11 of the kiln, and the high temperature flue gas above the middle of the high temperature zone 11 of the kiln can fully contact with the brick body during the falling process. The induced draft duct 31 draws in the high temperature flue gas that has completed the contact with the brick body and then outputs the high temperature flue gas to the front section 13 of the kiln; at the same time, the negative pressure formed by the induced draft duct 31 in the high temperature zone 11 of the kiln can also cause the high temperature flue gas above the middle of the high temperature zone 11 of the kiln to sink downward, so that the high temperature flue gas can fully contact with the brick body.
[0045] Optimally, the smoke exhaust assembly 2 includes: a smoke exhaust fan 21, a smoke exhaust main pipe 22 and a smoke exhaust branch pipe 23;
[0046] The air inlet end of the smoke exhaust fan 21 is connected to the output end of the smoke exhaust pipe 22 ; the multiple input ends of the smoke exhaust pipe 22 are connected to the output end of the smoke exhaust branch pipe 23 , and the input end of the smoke exhaust branch pipe 23 is connected to the kiln front section 13 .
[0047] The smoke exhaust fan 21 can form a negative pressure in the smoke exhaust main pipe 22, so that the high-temperature flue gas in the front section 13 of the kiln is sucked in through the smoke exhaust branch pipe 23, so that part of the high-temperature flue gas in the front section 13 of the kiln is extracted from the front section 13 of the kiln, and a negative pressure is formed in part of the front section 13 of the kiln, so that the high-temperature smoke is transmitted from the high-temperature zone 11 of the gas kiln, the middle section 12 of the kiln and the front section 13 of the kiln in sequence.
[0048] Optimally, the smoke extraction branch pipe 23 is far away from the kiln inlet 14 .
[0049] When the smoke extraction branch pipe 23 is far away from the kiln inlet 14, a negative pressure can be formed in the front section 13 of the kiln only in a partial area of the smoke extraction branch pipe 23, and a positive pressure can be formed when the blowing branch pipe 35 continuously outputs high-temperature flue gas to the kiln inlet 14, thereby forming an air curtain and utilizing the negative pressure formed by the smoke extraction branch pipe 23 to recover the high-temperature flue gas in the area other than the kiln inlet 14.
[0050] Optimally, some of the smoke extraction pipes 23 are symmetrically arranged at upper and lower positions of the front section 13 of the kiln.
[0051] When the smoke extraction pipe 23 is set at the upper and lower positions of the front section 13 of the kiln, the high-temperature flue gas can be transmitted along the upper and lower parts of the front section 13 of the kiln, and the high-temperature flue gas above the front section 13 of the kiln can drop to the middle and below the middle of the front section 13 of the kiln under the action of gravity. The high-temperature flue gas below the front section 13 of the kiln can block the outside air from entering from the lower part of the front section 13 of the kiln, thereby improving the heat uniformity of the front section 13 of the kiln.
[0052] Optimally, the blowing branch pipe 35 is arranged above and below the front section 13 of the kiln.
[0053] The blowing branch pipe 35 can be arranged above and below the middle of the front section 13 of the kiln, so as to blow air toward the bottom and surface of the bricks when the high-temperature flue gas enters the front section 13 of the kiln. The high-temperature flue gas directly contacts the brick body, and the heating uniformity of the brick body is improved.
[0054] Optimally, the blowing branch pipe 35 is provided with multiple rows of branch pipe air outlets 351 facing different directions.
[0055] When the blowing branch pipe 35 is provided with multiple rows of branch pipe air outlets 351, a single blowing branch pipe 35 can output high-temperature flue gas in different directions at the same time, such as in a straight direction, an oblique direction, a horizontal direction, etc. In this way, a single blowing branch pipe 35 can output high-temperature flue gas in multiple angles. Under the action of multiple blowing branch pipes 35, the flow rate of high-temperature flue gas is larger, and the heat uniformity of the front section 13 of the kiln is better.
[0056] It can be optimized to further include: an exhaust gas treatment device 4;
[0057] The air outlet end of the flue gas exhaust component 2 is connected to the exhaust gas treatment device 4.
[0058] The tail gas treatment device 4 is a well-known mechanism having a tail gas treatment function, such as one or more combinations of a desulfurization device, a denitrification device, a dust removal device, etc.
[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A kiln structure with an air curtain formed at the kiln opening, characterized in that: include: The kiln body, the fume exhaust assembly and the quick lift assembly; The kiln body comprises in sequence: a kiln high temperature zone, a kiln middle section and a kiln front section; The fume exhaust component has an exhaust function, and the air inlet end of the fume exhaust component is connected to the front section of the kiln; The rapid lifting assembly comprises: an induced draft pipe, a high temperature induced draft fan, a main blowing pipe, a branch blowing pipe and a branch blowing pipe; The input end of the induced draft duct is connected to the high temperature zone of the kiln; the air inlet end of the high temperature induced draft fan is connected to the output end of the induced draft duct, the air outlet end of the high temperature induced draft fan is connected to the input end of the main blowing pipe, and the output end of the main blowing pipe is connected to the branch blowing pipe; the branch blowing pipe extends along the length direction of the kiln body and extends to the kiln entrance at one end of the kiln body; a plurality of branch blowing pipes are arranged in sequence along the length direction of the branch blowing pipe to the kiln entrance; the input end of the branch blowing pipe is connected to the branch blowing pipe, and the output end of the branch blowing pipe is located in the front section of the kiln, and two rows of the branch blowing pipes are symmetrically arranged in the front section of the kiln.
2. The kiln structure with an air curtain formed at the kiln opening according to claim 1, characterized in that: The induced air duct is provided with a plurality of heat induced air outlets along the length direction, and some of the heat induced air outlets are arranged along the length direction of the high temperature zone of the kiln.
3. The kiln structure with an air curtain formed at the kiln opening according to claim 2, characterized in that: The induced draft duct is transversely arranged below the middle of the high temperature zone of the kiln.
4. The kiln structure with an air curtain formed at the kiln opening according to claim 1, characterized in that: The smoke exhaust assembly includes: a smoke exhaust fan, a smoke exhaust main pipe and a smoke exhaust branch pipe; The air inlet end of the smoke exhaust fan is connected to the output end of the smoke exhaust pipe; the multiple input ends of the smoke exhaust pipe are connected to the output end of the smoke exhaust branch pipe, and the input end of the smoke exhaust branch pipe is connected to the front section of the kiln.
5. The kiln structure with an air curtain formed at the kiln opening according to claim 4, characterized in that: The smoke extraction branch pipe is far away from the kiln inlet.
6. The kiln structure with an air curtain formed at the kiln opening according to claim 5, characterized in that: Some of the smoke extraction branch pipes are symmetrically arranged at upper and lower positions of the front section of the kiln.
7. The kiln structure with an air curtain formed at the kiln opening according to claim 1, characterized in that: The blowing branch pipes are arranged above and below the front section of the kiln.
8. The kiln structure with an air curtain formed at the kiln opening according to claim 7, characterized in that: The blowing branch pipe is provided with multiple rows of branch pipe air outlets facing different directions.
9. The kiln structure with an air curtain formed at the kiln opening according to claim 1, characterized in that: Also includes: Exhaust gas treatment device; The air outlet end of the smoke exhaust assembly is connected to the exhaust gas treatment device.