Retaining wall structure for roller kiln channel
By designing a baffle structure in the roller kiln channel to regulate the airflow distribution, the problem of pressure and temperature regulation inside the kiln was solved, thereby improving the heat utilization rate of flue gas and the uniform heating effect of the product.
Patent Information
- Application Number
- CN202423019565.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-09
AI Technical Summary
The existing roller kiln is a hollow kiln with a large working channel space and small air flow resistance, making it difficult to adjust the pressure and temperature systems in the kiln.
A baffle structure for a roller kiln channel is designed, comprising multiple rollers, a lower baffle assembly, and an upper baffle. By adjusting the position of the upper baffle and the combination of the baffles, the airflow distribution is adjusted to regulate the temperature and pressure inside the kiln.
It effectively prevents backflow of flue gas in the firing zone, reduces the impact of pressure fluctuations on temperature, improves the heat utilization rate of flue gas, eliminates horizontal temperature differences in the kiln, and enhances the heat transfer effect on both sides of the kiln wall.
Smart Images
Figure CN223448896U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of roller kiln, concretely to a retaining wall structure for roller kiln passage. BACKGROUND
[0002] The roller kiln is also called roller hearth kiln, and is mainly used for the production of ceramic building materials such as ceramic tiles. The roller kiln is a continuous firing kiln, and a rotating roller is used as a carrier for a green body. The combustion chamber of the roller kiln is below the roller, and fuel such as heavy oil, diesel oil, kerosene, etc. is atomized by compressed air for combustion. Alternatively, coal gas produced by a coal gas generator is used for combustion. Large ceramic factories usually use a double-section cold coal gas station to burn cold coal gas to produce high temperature. The combustion chamber and the roller are separated by refractory material, and the flame does not directly contact the products being fired. Compared with the use of heavy oil, diesel oil, etc. as fuel, the use of coal gas as fuel has lower cost and higher efficiency. In addition, when heavy oil is used as fuel, a flame isolation or semi-flame isolation form is required to prevent smoke pollution of the products. When electricity is used as the heat source, the heating body and the products need to be separated to protect the heating body and to make the temperature more uniform.
[0003] However, the existing roller kiln is a hollow kiln, and the working passage space is large, the air flow resistance is small, and it is difficult to adjust the pressure system and temperature system in the kiln. Therefore, the retaining wall structure for the roller kiln passage is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL
[0004] In view of the deficiencies of the prior art, the utility model provides a retaining wall structure for the roller kiln passage, which solves the problem that the roller kiln is a hollow kiln, the working passage space is large, the air flow resistance is small, and it is difficult to adjust the pressure system and temperature system in the kiln.
[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a retaining wall structure for the roller kiln passage, comprising a kiln passage, a plurality of roller bars are arranged in the inner cavity of the kiln passage, and the two ends of the roller bars penetrate through the two side walls of the kiln passage, respectively, a lower retaining assembly is arranged at the bottom of the inner cavity of the kiln passage, a plug hole is formed in the top surface of the kiln passage, the bottom end of the plug hole extends to the inner cavity of the kiln passage, and at least one upper retaining plate is arranged in the inner cavity of the plug hole.
[0006] Preferably, the lengths of the plurality of upper retaining plates are the same as the length of the inner cavity of the plug hole.
[0007] Preferably, the lower retaining assembly comprises a first retaining wall arranged on the bottom surface of the inner cavity of the kiln passage, and the two ends of the first retaining wall are connected to the two side walls of the inner cavity of the kiln passage, respectively.
[0008] Preferably, the lower blocking assembly comprises a second blocking wall arranged on the bottom surface of the inner cavity of the kiln passage, two ends of the second blocking wall are connected with the two side walls of the inner cavity of the kiln passage respectively, and at least one ventilation sawtooth opening is arranged on the top surface of the second blocking wall.
[0009] Preferably, the lower blocking assembly comprises a splayed blocking wall arranged at the middle position of the bottom of the inner cavity of the kiln passage, and the two side walls of the splayed blocking wall are provided with third blocking walls, one end of each of the two third blocking walls is connected with the two side walls of the inner cavity of the kiln passage.
[0010] Preferably, the upper blocking plate is made of heat-resistant steel plate or hard high-temperature ceramic fiber plate.
[0011] Beneficial effects
[0012] The utility model provides a blocking wall structure for roller kiln passage.
[0013] The blocking wall structure for the roller kiln passage can transport products through multiple roller bars, install and fix the second blocking wall or the splayed blocking wall and the two third blocking walls, provide space for the jack, insert and install the upper blocking plate through the jack, adjust the position height of the upper blocking plate, adjust the position of the bottom end inserted into the kiln passage, separate the firing zone and the cooling zone through the cooperation of the upper blocking plate and the first blocking wall, avoid backflow of smoke in the firing zone and reduce the temperature of the high-temperature zone when the rapid cooling air jumps to the firing zone, increase the residence time of smoke in the high-temperature zone through the upper blocking plate and the first blocking wall at the junction of the preheating zone and the firing zone, and improve the heat utilization rate of smoke.
[0014] Because the gas near the kiln walls in the kiln passage is affected by the frictional force along the path, the flow rate is generally smaller than the flow rate in the middle, especially in the preheating zone, the gas flow near the kiln walls is in a clear laminar state, the difference in horizontal flow rate naturally causes a temperature difference, in addition, the heat dissipation of the kiln walls also makes the temperature of the gas flow near the kiln walls lower than that in the middle, combined with the difference in the arrangement of the burners in the combustion zone, it is easy to cause a horizontal temperature difference in the kiln, thereby affecting the uniform heating of the products in the horizontal direction, therefore, the second blocking wall can be used in cooperation with multiple ventilation sawtooth openings, or the splayed blocking wall can be used in cooperation with the two third blocking walls, thereby adjusting the upward and downward movement distribution of the gas flow, which can achieve good results in eliminating the horizontal temperature difference in the kiln, and the positions of the upper blocking plates on the two sides can also be adjusted, when the gap between the kiln walls is larger and the gap in the middle is smaller, the gas flow near the kiln walls is increased and the gas flow in the middle is reduced, thereby achieving the effect of strengthening the heat transfer of the kiln walls to the products. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1The whole structure schematic view of the present utility model is shown in the figure.
[0016] Figure 2 The first retaining wall structure schematic view of the present utility model is shown in the figure.
[0017] Figure 3 The second retaining wall structure schematic view of the present utility model is shown in the figure.
[0018] Figure 4 The eight-character retaining wall and the third retaining wall structure schematic view of the present utility model is shown in the figure.
[0019] In the figure: 1, kiln passage; 2, roller stick; 3, lower retaining assembly; 31, first retaining wall; 32, second retaining wall; 33, ventilation sawtooth opening; 34, eight-character retaining wall; 35, third retaining wall; 4, jack; 5, upper retaining plate. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present utility model.
[0021] Embodiment 1
[0022] Please refer to Figures 1-2 The present utility model provides a technical scheme: a retaining wall structure for roller kiln passage, which comprises a kiln passage 1, the inner cavity of the kiln passage 1 is provided with a plurality of roller sticks 2, and the two ends of the roller stick 2 respectively penetrate through the two side walls of the kiln passage 1, the inner cavity bottom of the kiln passage 1 is provided with a lower retaining assembly 3, the top surface of the kiln passage 1 is provided with a jack 4, and the bottom end of the jack 4 extends to the inner cavity of the kiln passage 1, the inner cavity of the jack 4 is provided with at least one upper retaining plate 5, the lower retaining assembly 3 comprises a first retaining wall 31 arranged on the inner cavity bottom surface of the kiln passage 1, the two ends of the first retaining wall 31 are respectively connected with the two side walls of the inner cavity of the kiln passage 1;
[0023] Through the kiln passage 1, the product can be transported by the plurality of roller bars 2, the first blocking wall 31 in the lower blocking assembly 3 can be installed and fixed, the space can be provided for the insertion hole 4, the upper blocking plate 5 can be inserted and installed through the insertion hole 4, the position of the bottom end inserted into the kiln passage 1 can be adjusted by adjusting the position height of the upper blocking plate 5, the upper blocking plate 5 and the first blocking wall 31 can cooperate to separate the firing zone and the cooling zone at the junction, the smoke backflow of the firing zone is avoided, the quenching air is prevented from jumping to the firing zone to reduce the temperature of the high-temperature zone when the pressure fluctuates, and the upper blocking plate 5 and the first blocking wall 31 at the junction of the preheating zone and the firing zone can increase the residence time of the smoke in the high-temperature zone, and the heat utilization rate of the smoke is improved.
[0024] Referring to Figure 1 The length of the plurality of upper blocking plates 5 is the same as the length of the inner cavity of the insertion hole 4, so that the plurality of upper blocking plates 5 can be flexibly inserted and installed on the insertion hole 4.
[0025] Referring to Figure 1 The upper blocking plate 5 is made of heat-resistant steel plate or hard high-temperature ceramic fiber plate, which can play a role in fireproofing and heat resistance, and improve the service life.
[0026] Embodiment 2
[0027] Referring to Figure 1 , Figure 3 and Figure 4 , the utility model provides a technical scheme: a kind of blocking wall structure for roller kiln passage, including kiln passage 1, the inner cavity of kiln passage 1 is provided with a plurality of roller bars 2, and the two ends of roller bar 2 are respectively through the two side walls of kiln passage 1, the inner cavity bottom of kiln passage 1 is provided with lower blocking assembly 3, the top surface of kiln passage 1 is provided with insertion hole 4, and the bottom end of insertion hole 4 extends to the inner cavity of kiln passage 1, the inner cavity of insertion hole 4 is provided with at least one upper blocking plate 5, lower blocking assembly 3 includes second blocking wall 32 being arranged in the inner cavity bottom surface of kiln passage 1, the two ends of second blocking wall 32 are respectively connected with the two side walls of the inner cavity of kiln passage 1, at least one ventilation sawtooth mouth 33 is opened on the top surface of second blocking wall 32, lower blocking assembly 3 includes splayed blocking wall 34 being arranged in the inner cavity bottom middle position of kiln passage 1, the two side walls of splayed blocking wall 34 are provided with third blocking wall 35, one end of two third blocking walls 35 is respectively connected with the two side walls of the inner cavity of kiln passage 1;
[0028] Through the kiln passage 1, the product can be transported by the plurality of roller bars 2, the second baffle wall 32 or the splayed baffle wall 34 and the two third baffle walls 35 can be installed and fixed, and the jack 4 can be provided with a space, and through the jack 4, the upper baffle 5 can be inserted and installed, and by adjusting the position height of the upper baffle 5, the position of the bottom end inserted into the kiln passage 1 can be adjusted. Because the gas near the two sides of the kiln wall in the kiln passage 1 is affected by the friction force along the path, the flow rate is generally smaller than the flow rate in the middle, especially in the preheating zone, the gas flow near the two sides of the kiln wall is obviously in a laminar flow state, and the difference in horizontal flow velocity naturally causes a temperature difference. In addition, because the kiln wall radiates heat, the gas flow near the two sides of the kiln wall is lower than the gas flow in the middle, and in addition, because of the difference in the arrangement of the burners in the combustion zone, the horizontal temperature difference in the kiln is easy to cause, thereby affecting the uniform heating of the product in the horizontal direction. Therefore, the second baffle wall 32 can be used in cooperation with the plurality of ventilation sawtooth openings 33, or the splayed baffle wall 34 can be used in cooperation with the two third baffle walls 35, so as to adjust the upward and downward movement distribution of the gas flow, thereby achieving good effect in eliminating the horizontal temperature difference in the kiln, and the position of the two side upper baffles 5 can be adjusted. When the passage gap on the two sides of the kiln wall is larger, and the passage gap in the middle is smaller, the gas flow on the two sides of the kiln wall can be increased, and the gas flow in the middle can be reduced, thereby achieving the effect of strengthening the heat transfer of the product on the two sides of the kiln wall.
[0029] Referring to Figure 1 The length of the plurality of upper baffles 5 is the same as the length of the inner cavity of the jack 4, so that the plurality of upper baffles 5 can be flexibly inserted and installed on the jack 4.
[0030] Referring to Figure 1 The upper baffle 5 is made of heat-resistant steel plate or hard high-temperature ceramic fiber plate, which can play a role in fireproofing and heat resistance, and can improve the service life.
[0031] When working, through the kiln passage 1, the product can be transported by the plurality of roller bars 2, the second baffle wall 32 or the splayed baffle wall 34 and the two third baffle walls 35 can be installed and fixed, the space for the jack 4 can be provided, the upper baffle plate 5 can be inserted and installed through the jack 4, the position of the bottom end inserted into the kiln passage 1 can be adjusted by adjusting the position height of the upper baffle plate 5, the upper baffle plate 5 and the first baffle wall 31 can cooperate to separate the firing zone and the cooling zone at the junction, which can avoid the backflow of the flue gas in the firing zone and the temperature drop in the high-temperature zone caused by the quenching air rushing to the firing zone when the pressure fluctuates, and the upper baffle plate 5 and the first baffle wall 31 at the junction of the preheating zone and the firing zone can increase the residence time of the flue gas in the high-temperature zone and improve the heat utilization rate of the flue gas. Because the gas near the kiln wall in the kiln passage 1 is affected by the frictional force along the path, the flow rate is generally smaller than the flow rate in the middle, especially in the preheating zone, the gas flow near the kiln wall is in a clear laminar state, and the difference in horizontal flow velocity naturally causes a temperature difference. In addition, the heat dissipation of the kiln wall also makes the gas flow near the kiln wall lower than the middle, combined with the difference in the arrangement of the burners in the firing zone, it is easy to cause the horizontal temperature difference in the kiln, thereby affecting the uniform heating of the product in the horizontal direction. Therefore, the second baffle wall 32 can cooperate with the plurality of ventilation sawtooth openings 33, or the splayed baffle wall 34 can cooperate with the two third baffle walls 35, thereby adjusting the upward and downward movement distribution of the gas flow, which can achieve good results in eliminating the horizontal temperature difference in the kiln, and the position of the upper baffle plate 5 on both sides can also be adjusted. When the gap between the kiln wall and the passage is larger on both sides and the gap in the middle is smaller, the gas flow on both sides of the kiln wall can be increased and the gas flow in the middle can be reduced, thereby enhancing the heat transfer of the product on both sides of the kiln wall.
[0032] In summary, the upper baffle plate 5 and the lower baffle assembly 3 can cooperate to separate the firing zone and the cooling zone at the junction, which can avoid the backflow of the flue gas in the firing zone and the temperature drop in the high-temperature zone caused by the quenching air rushing to the firing zone when the pressure fluctuates, and the upper baffle plate 5 and the lower baffle assembly 3 at the junction of the preheating zone and the firing zone can increase the residence time of the flue gas in the high-temperature zone and improve the heat utilization rate of the flue gas.
[0033] Meanwhile, the contents not described in detail in the specification all belong to the prior art known to those skilled in the art.
Claims
1. A retaining wall structure for a roller kiln channel, comprising a kiln channel (1), wherein a plurality of rollers (2) are provided in the inner cavity of the kiln channel (1), and the two ends of the rollers (2) respectively penetrate the two side walls of the kiln channel (1), characterized in that: A lower baffle assembly (3) is provided at the bottom of the inner cavity of the kiln channel (1), a plug hole (4) is provided on the top surface of the kiln channel (1), and the bottom end of the plug hole (4) extends to the inner cavity of the kiln channel (1), and the inner cavity of the plug hole (4) is provided with at least one upper baffle (5).
2. A retaining wall structure for a roller kiln passage according to claim 1, characterized in that: The length of the plurality of upper baffles (5) is the same as the inner cavity length of the insertion hole (4).
3. The retaining wall structure for a roller kiln passage according to claim 1, characterized in that: The lower retaining assembly (3) comprises a first retaining wall (31) arranged on the bottom surface of the inner cavity of the kiln channel (1), and the two ends of the first retaining wall (31) are respectively connected to the two side walls of the inner cavity of the kiln channel (1).
4. The retaining wall structure for a roller kiln passage according to claim 1, characterized in that: The lower retaining assembly (3) comprises a second retaining wall (32) arranged on the bottom surface of the inner cavity of the kiln channel (1), the two ends of the second retaining wall (32) are respectively connected to the two side walls of the inner cavity of the kiln channel (1), and the top surface of the second retaining wall (32) is provided with at least one ventilation serrated opening (33).
5. The retaining wall structure for a roller kiln passage according to claim 1, characterized in that: The lower retaining assembly (3) comprises an eight-shaped retaining wall (34) arranged at the middle position of the bottom of the inner cavity of the kiln channel (1), and third retaining walls (35) are arranged on both side walls of the eight-shaped retaining wall (34), and one end of the two third retaining walls (35) is respectively connected to the two side walls of the inner cavity of the kiln channel (1).
6. The retaining wall structure for a roller kiln passage according to claim 1, characterized in that: The upper baffle (5) is made of a heat-resistant steel plate or a hard high-temperature ceramic fiber plate.