Kiln structure with middle section combusting to enable front section to be rapidly heated

Abstract

The utility model discloses a kiln structure for quickly heating a front section through middle section combustion. The kiln structure comprises a kiln main body, a flue gas exhausting assembly and a quick lifting assembly, the flue gas exhausting assembly has an exhausting function, and the air inlet end of the flue gas exhausting assembly communicates with the front section of the kiln. The combustion device is arranged at the middle section of the kiln; the air inlet end of the high-temperature induced draft fan communicates with the combustion device, the air outlet end of the high-temperature induced draft fan communicates with the input end of the induced draft pipe, and the output end of the induced draft pipe communicates with the front section of the kiln. According to the scheme, the combustion device is arranged in the kiln middle section of the kiln main body, so that heat flow of the combustion device can be output to the kiln front section by the high-temperature induced draft fan through the induced draft pipe, and the flue gas can be combusted before being output to the kiln front section from a kiln high-temperature area, so that the oxygen content and the total amount of the flue gas are reduced before the flue gas is conveyed to the kiln front section; the tail gas treatment of the kiln is facilitated, and the problem that tail gas treatment is troublesome due to the fact that flue gas still has high oxygen content when being output to the front section of the kiln from a high-temperature area of the kiln is solved.

Description

Technical Field

[0001] The utility model relates to the field of kilns, in particular to a kiln structure with a middle section burning to allow a front section to quickly heat up. Background Art

[0002] Tiles in the building ceramics industry are generally fired in roller kilns; and 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 local overheating, which will make the blank very easy to crack, explode bricks and other defects. At the same time, the high-temperature flue gas in the existing kiln contains unburned components and oxygen. On the one hand, the incomplete combustion of high-temperature flue gas will lead to energy waste and increase the cost of kiln use; on the other hand, oxygen will increase the steps of tail gas treatment, thereby increasing the cost of tail gas treatment. Utility Model Content

[0003] The purpose of the utility model is to propose a kiln structure that can rapidly heat up the front section by burning in the middle section. A combustion device is arranged in the middle section of the kiln main body, which can output the heat flow of the combustion device to the front section of the kiln through the induced draft pipe by the high-temperature induced draft fan, and can also burn the flue gas before it is output from the high-temperature area of ​​the kiln to the front section of the kiln, thereby reducing the oxygen content and total amount of flue gas before it is transported to the front section of the kiln, which is very beneficial to the treatment of the tail gas of the kiln.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A kiln structure with a middle section burning to rapidly heat up the front section, 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: a combustion device, a high-temperature induced draft fan and an induced draft pipe;

[0009] The combustion device is arranged in the middle section of the kiln; the air inlet end of the high-temperature induced draft fan is connected to the combustion device, the air outlet end of the high-temperature induced draft fan is connected to the input end of the induced draft duct, and the output end of the induced draft duct is connected to the front section of the kiln.

[0010] Optimally, the combustion device is a hot blast stove burner.

[0011] Preferably, the smoke exhaust assembly comprises: a smoke exhaust fan, a smoke exhaust main pipe and a smoke exhaust branch pipe;

[0012] 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.

[0013] Optimally, the rapid lifting assembly further comprises: a blowing branch pipe;

[0014] The air duct extends along the length direction of the kiln body and extends to the kiln inlet at one end of the kiln body;

[0015] The plurality of blowing branch pipes are arranged in sequence along the length direction of the induced draft pipe to the kiln entrance; the input end of the blowing branch pipe is connected to the induced draft pipe, the output end of the blowing branch pipe is located in the front section of the kiln, and the two rows of blowing branch pipes are symmetrically arranged in the front section of the kiln.

[0016] Optimally, the smoke extraction branch pipe is far away from the kiln inlet.

[0017] Preferably, some of the smoke extraction branch pipes are symmetrically arranged at upper and lower positions of the front section of the kiln.

[0018] Optimally, the blowing branch pipe is arranged above and / or below the front section of the kiln.

[0019] Preferably, the blowing branch pipe is provided with multiple rows of branch pipe air outlets facing different directions.

[0020] It can be optimized to further include: an exhaust gas treatment device;

[0021] The air outlet end of the smoke exhaust assembly is connected to the exhaust gas treatment device.

[0022] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0023] The present solution provides a kiln structure that can rapidly heat up the front section by means of middle section combustion, in which a combustion device is arranged in the middle section of the kiln main body, which can output the heat flow of the combustion device to the front section of the kiln through the induced draft duct by the high-temperature induced draft fan, and can also burn the flue gas before it is output from the high-temperature zone of the kiln to the front section of the kiln, thereby reducing the oxygen content and the total amount of flue gas before it is transported to the front section of the kiln, which is very beneficial to the exhaust gas treatment of the kiln, and solves the problem that the exhaust gas treatment is troublesome due to the high oxygen content when the flue gas is output from the high-temperature zone of the kiln to the front section of the kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of one embodiment of the kiln structure;

[0025] Figure 2 It is a structural schematic diagram of one embodiment of the blowing branch pipe;

[0026] in:

[0027] Kiln main body 1, smoke exhaust assembly 2, rapid lifting assembly 3; tail gas treatment device 4;

[0028] kiln high temperature area 11, kiln middle section 12, kiln front section 13; kiln entrance 14;

[0029] Smoke fan 21, smoking supervisor 22, smoking sub-in-charge 23;

[0030] Combustion device 31, high temperature induced draft fan 32, induced draft pipe 33; blowing branch pipe 34;

[0031] Branch pipe vent 341. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] like Figure 1-2 , a kiln structure in which the middle section burns to rapidly heat up the front section, comprising: a kiln body 1, a fume exhaust assembly 2 and a rapid lifting assembly 3;

[0035] 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;

[0036] 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;

[0037] The rapid lifting assembly 3 includes: a combustion device 31, a high-temperature induced draft fan 32 and an induced draft pipe 33;

[0038] The combustion device 31 is arranged in the middle section 12 of the kiln; the air inlet end of the high-temperature induced draft fan 32 is connected to the combustion device 31, the air outlet end of the high-temperature induced draft fan 32 is connected to the input end of the induced draft duct 33, and the output end of the induced draft duct 33 is connected to the front section 13 of the kiln.

[0039] The present solution provides a kiln structure that rapidly heats up the front section by mid-section combustion, wherein a combustion device 31 is disposed in the kiln mid section 12 of the kiln main body 1, which can output the heat flow of the combustion device 31 to the kiln front section 13 through the induced draft duct 33 in the high-temperature induced draft fan 32, and can also burn the flue gas before it is output from the kiln high-temperature zone 11 to the kiln front section 13, thereby reducing the oxygen content and the total amount of flue gas before it is transported to the kiln front section 13, which is very beneficial to the kiln exhaust gas treatment, and solves the problem that the flue gas still has a high oxygen content when it is output from the kiln high-temperature zone 11 to the kiln front section 13, causing trouble in exhaust gas treatment.

[0040] The high temperature zone 11 of the kiln is the location where the kiln body 1 generates high temperature flue gas, 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, so as to drive the high temperature flue gas from the high temperature zone 11 of the kiln to be transmitted 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; the combustion device 31 is arranged in the middle section 12 of the kiln, and the middle section 12 of the kiln has a combustion function, and oxygen is required during combustion, which can consume the oxygen in the high temperature flue gas output from the high temperature zone 11 of the kiln, thereby reducing the oxygen content in the flue gas, and the oxygen content of the flue gas is reduced by 10-20% compared with the flue gas in the traditional kiln; the reduction in oxygen content can simplify the subsequent exhaust gas treatment of the flue gas; after the oxygen content of the flue gas is reduced, the steps of exhaust gas treatment can be reduced or the exhaust gas treatment time can be shortened, for example, the desulfurization of the flue gas is simpler. In addition, there are still unburned components in the flue gas, and the combustion device 31 can continue to burn the combustible part of the flue gas, thereby improving the efficiency of fuel use. The heat after combustion by the combustion device 31 is transferred to the flue gas, and then the high-temperature induced draft fan 32 is started, and the high-temperature induced draft fan 32 outputs the flue gas from the middle section 12 of the kiln to the front section 13 of the kiln through the induced draft duct 33; 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 turn, and part of the flue gas is output from the induced draft duct 33 to the front section 13 of the kiln. The flue gas is transported to the front section 13 of the kiln through multiple channels, which increases the flow rate of the flue gas and makes the exhaust gas treatment of the flue gas more convenient and the combustion more complete.

[0041] 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.

[0042] Optimally, the combustion device 31 is a hot air furnace burner.

[0043] The hot blast stove burner uses air as the heat transfer medium, and the heating speed is very fast, and the heat can be evenly transferred to the high-temperature flue gas. At the same time, because the hot blast stove burner uses air as the heat transfer medium, it can greatly reduce the heating cost and effectively reduce energy waste. It can continue to burn the unburned part of the high-temperature flue gas, and can also consume the oxidation in the high-temperature flue gas, thereby reducing the difficulty of tail gas treatment and achieving high efficiency and energy saving.

[0044] 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;

[0045] 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 .

[0046] 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.

[0047] Optimally, the rapid lifting assembly 3 further includes: a blowing branch pipe 34;

[0048] The air duct 33 extends along the length direction of the kiln body 1 and extends to the kiln inlet 14 at one end of the kiln body 1;

[0049] The plurality of blowing branch pipes 34 are arranged in sequence along the length direction of the induced draft pipe 33 to the kiln entrance 14; the input end of the blowing branch pipe 34 is connected to the induced draft pipe 33, and the output end of the blowing branch pipe 34 is located in the front section 13 of the kiln, and two rows of the blowing branch pipes 34 are symmetrically arranged in the front section 13 of the kiln.

[0050] 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 and drawn to the induced draft duct 33, thereby outputting the high-temperature flue gas in the induced draft duct 33 to the blowing branch pipe 34, and one end of the induced draft duct 33 can extend to the kiln inlet 14 at one end of the kiln body 1; when the blowing branch pipes 34 are arranged in sequence along the length direction of the blowing branch pipe, some of the blowing branch pipes 34 can be arranged to the kiln inlet 14; the induced draft duct 33 can output the high-temperature flue gas to the blowing branch pipe 34, and then output it to the front section 13 of the kiln through the blowing branch pipe 34; 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 duct 33 and the blowing branch pipe 34, which can achieve rapid heating of the front section 13 of the kiln. Furthermore, two rows of blowing branch pipes 34 are symmetrically arranged at the front section 13 of the kiln, and the symmetrical distribution can be vertically symmetrical, or left-right symmetrical; when the blowing branch pipes 34 are symmetrically distributed, the blowing branch pipes 34 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 and isolate the air outside the kiln body 1, thereby preventing external air from entering the kiln inlet 14 to reduce the temperature of the kiln body 1.

[0051] It can be further optimized that the smoke extraction branch pipe 23 is far away from the kiln inlet 14 .

[0052] When the smoke extraction branch pipe 23 is far away from the kiln inlet 14, 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 positive pressure can be formed when the blowing branch pipe 34 continuously outputs high-temperature flue gas to the kiln inlet 14, thereby forming an air curtain that can fill the kiln inlet 14 and isolate the air outside the kiln body 1, thereby preventing external air from entering the kiln inlet 14 to reduce the temperature of the kiln body 1, and the negative pressure formed by the smoke extraction branch pipe 23 can be used to recover the high-temperature flue gas in the non-kiln inlet 14 area.

[0053] Optimally, some of the smoke extraction pipes 23 are symmetrically arranged at upper and lower positions of the front section 13 of the kiln.

[0054] 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.

[0055] Optimally, the blowing branch pipe 34 is arranged above and / or below the front section 13 of the kiln.

[0056] The blowing branch pipe 34 can be arranged above the middle and / or below the middle of the front section 13 of the kiln, so that when the high-temperature flue gas enters the front section 13 of the kiln, air is blown toward the bottom and surface of the bricks. The high-temperature flue gas directly contacts the brick body, and the heating uniformity of the brick body is improved.

[0057] Preferably, the blowing branch pipe 34 is provided with multiple rows of branch pipe air outlets 341 facing different directions.

[0058] When the blowing branch pipe 34 is provided with multiple rows of branch pipe air outlets 341, a single blowing branch pipe 34 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 34 can output high-temperature flue gas in multiple angles. Under the action of multiple blowing branch pipes 34, the flow rate of high-temperature flue gas is larger, and the heat uniformity of the front section 13 of the kiln is better.

[0059] It can be optimized to further include: an exhaust gas treatment device 4;

[0060] The air outlet end of the flue gas exhaust component 2 is connected to the exhaust gas treatment device 4.

[0061] 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.

[0062] 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 in which the middle section burns to rapidly heat up the front section, characterized in that: include: The kiln body, the fume exhaust assembly and the quick lift assembly; 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; 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 includes: a combustion device, a high-temperature induced draft fan and an induced draft pipe; The combustion device is arranged in the middle section of the kiln; the air inlet end of the high-temperature induced draft fan is connected to the combustion device, the air outlet end of the high-temperature induced draft fan is connected to the input end of the induced draft duct, and the output end of the induced draft duct is connected to the front section of the kiln.

2. A kiln structure with middle stage combustion to rapidly heat up the front stage according to claim 1, characterized in that: The combustion device is a hot blast stove burner.

3. The kiln structure with middle stage combustion to rapidly heat up the front stage according to claim 1 is 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.

4. A kiln structure with middle stage combustion to rapidly heat up the front stage according to claim 3, characterized in that: The rapid lifting assembly also includes: a blowing branch pipe; The air duct extends along the length direction of the kiln body and extends to the kiln inlet at one end of the kiln body; The plurality of blowing branch pipes are arranged in sequence along the length direction of the induced draft pipe to the kiln entrance; the input end of the blowing branch pipe is connected to the induced draft pipe, the output end of the blowing branch pipe is located in the front section of the kiln, and the two rows of blowing branch pipes are symmetrically arranged in the front section of the kiln.

5. The kiln structure with middle stage combustion to rapidly heat up the front stage according to claim 4 is characterized in that: The smoke extraction branch pipe is far away from the kiln inlet.

6. The kiln structure with middle stage combustion to rapidly heat up the front stage 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 middle stage combustion to rapidly heat up the front stage according to claim 4 is characterized in that: The blowing branch pipe is arranged above and / or below the front section of the kiln.

8. The kiln structure with middle stage combustion to rapidly heat up the front stage 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 middle stage combustion to rapidly heat up the front stage 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.

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