Novel energy-saving low-carbon grate cooler fixed end structure
By designing a diversion mechanism and a fixed-end structure, uniform distribution of cement clinker on the grate cooler was achieved, solving the problem of uneven distribution of coarse and fine materials, improving cooling effect and efficiency, and avoiding short-circuiting of the red river and cooling air.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-10
AI Technical Summary
When cement clinker exits the kiln, coarse material is distributed on one side of the grate cooler and fine material is distributed on the other side, resulting in the cooling air having difficulty penetrating the clinker layer or forming a cooling air short circuit, which affects the cooling effect and efficiency of high-temperature cement clinker.
The design includes a flow distribution mechanism and a fixed-end structure, including a distribution block, a guide plate, and a tertiary air duct. The clinker is initially mixed by the acute angle of the distribution block and the arc-shaped leakage hole. The rotary kiln and the grate cooler are arranged vertically along their lengths. A fixed-end design with a wide-narrow-wide profile is adopted to ensure uniform clinker distribution and cooling efficiency.
This solves the problem of uneven distribution of coarse and fine materials in cement clinker on the grate cooler, avoids the short circuit between the red river and the cooling air, and improves the cooling effect and efficiency of cement clinker.
Smart Images
Figure CN223985584U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grate cooler technology, and more specifically, to a novel energy-saving and low-carbon grate cooler fixed end structure. Background Technology
[0002] Currently, the clinker particles exiting the rotary kiln have varying sizes. This results in larger particles, due to their greater mass, not being carried to higher positions by the kiln's rotation, while smaller particles, due to their smaller mass, are carried to higher positions. Consequently, when the cement clinker exits the kiln, coarse particles are distributed on one side of the fixed grate of the grate cooler, while fine particles are distributed on the other side—a segregation phenomenon. This segregation causes the cement clinker to remain somewhat brittle as it flows from the fixed end to the moving end. However, the coarse material is distributed on one side of the grate, while the fine material is distributed on the other side. This results in the fine material side of the grate being densely packed due to the smaller particle size of the cement clinker, making it difficult for cooling air to penetrate the clinker layer, leading to the "red river" phenomenon. On the coarse material side of the grate, the larger particle size of the cement clinker results in larger gaps in the material layer, causing some cooling air to leave the clinker layer before it has time to exchange heat with the high-temperature cement clinker, resulting in a cooling air short-circuit phenomenon. Both the "red river" phenomenon and the cooling air short-circuit phenomenon are detrimental to the cooling of high-temperature cement clinker. In view of this, we propose a new energy-saving and low-carbon fixed-end structure for the grate cooler. Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a new type of energy-saving and low-carbon grate cooler fixed end structure to solve the technical problem that coarse material is distributed on one side of the grate cooler grate bed while fine material is distributed on the other side of the grate bed when cement clinker is discharged from the kiln.
[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a novel energy-saving and low-carbon grate cooler fixed end structure, including a grate cooler shell and a rotary kiln, and a flow diversion mechanism disposed within the grate cooler shell. The grate cooler shell includes a kiln head cover, a fixed end, and a movable end. The flow diversion mechanism includes a material distribution block disposed at the fixed end. A rectangular opening is formed between the side end of the material distribution block and the inner wall of the fixed end. Side baffles are symmetrically disposed at the front and rear ends of the material distribution block. An upper baffle is symmetrically disposed at the upper end of the material distribution block. A guide plate is disposed at the upper end of the material distribution block.
[0005] Preferably, the end of the rotary kiln is located inside the grate cooler housing, and a tertiary air duct is provided at the upper part of the side end of the grate cooler housing, with the tertiary air duct located above the rotary kiln.
[0006] Preferably, the kiln head hood is the upper part of the grate cooler housing, the fixed end and the movable end are the lower part of the grate cooler housing, and the movable end is located in front of the fixed end.
[0007] Preferably, the fixed end includes a concentrating part and a discharging part. The concentrating part gradually narrows from top to bottom. The discharging part is located at the front end of the concentrating part and gradually widens from narrow to wide. The bottom of the fixed end is arranged as a downward slope from front to back.
[0008] Preferably, the front and rear ends of the material distribution block are both inclined, the upper end of the material distribution block is set with an acute angle, the area of the material distribution block gradually increases from top to bottom, the rear end face of the material distribution block is provided with a material distribution groove, the material distribution groove is radially distributed from top to bottom, and the front end face of the material distribution block is provided with equally spaced leakage holes, the leakage holes are set in an arc shape, and the leakage holes form a discharge hole at the lower end of the material distribution block.
[0009] Preferably, the guide plate is located directly below the end of the rotary kiln, the guide plate is curved upwards from the middle to both sides, the upper end of the guide plate is provided with a guide groove, the middle position of the guide groove is provided with a discharge port, and the discharge port is located directly above the acute angle of the upper end of the material distribution block.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] 1. This utility model designs a material distribution block structure. The upper end of the material distribution block is set with an acute angle, and both the front and rear ends of the material distribution block are set with slopes. When clinker falls onto the material distribution block, it will flow along the acute angle to the front and rear ends of the material distribution block. Some clinker will fall into the material distribution groove on the rear end face of the material distribution block. The material distribution groove is radially distributed from top to bottom, so that the clinker is dispersed at different angles during the downward flow, achieving preliminary mixing. Another part of the clinker passes through the arc-shaped leakage holes equidistantly opened on the front end face of the material distribution block, as well as the discharge holes formed by the leakage holes. Because the leakage holes are arc-shaped, when the clinker passes through... The change in direction and speed further promotes the mixing of clinker of different particle sizes, allowing cement clinker of different particle sizes to fall evenly into the fixed end. Secondly, the rotary kiln has been changed from being arranged parallel to the length direction of the grate cooler to being arranged perpendicular to the length direction of the grate cooler. This method avoids the phenomenon of uneven distribution of coarse and fine materials along the width direction of the grate cooler caused by the segregation of clinker exiting the kiln, ensuring the cooling effect and efficiency of cement clinker, and solving the current problem that coarse materials are distributed on one side of the grate bed of the grate cooler while fine materials are distributed on the other side of the grate bed when cement clinker exits the kiln.
[0012] 2. This utility model also designs a concentrating section and a discharging section structure. The concentrating section and the discharging section form a wide-narrow-wide structure. The fixed end adopts a wide-narrow-wide design, which can re-premix the high-temperature cement clinker flowing forward along the length direction of the grate cooler. This ensures that when the clinker flows from the fixed end to the moving end, the coarse material will not be concentrated on one side and the fine material will be concentrated on the other side. This allows the clinker at the fixed end to achieve a rapid cooling effect and avoids the phenomenon of local blow-through of the clinker, further ensuring the cooling effect and efficiency of the cement clinker. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the prior art of this utility model;
[0014] Figure 2 This is a front view structural diagram of the present utility model;
[0015] Figure 3 This is a cross-sectional structural diagram of the present invention;
[0016] Figure 4 This is a schematic diagram of the internal structure of the fixed end of this utility model;
[0017] Figure 5 This is a schematic diagram of the diversion mechanism structure of this utility model;
[0018] Figure 6 This is a schematic diagram of the material distribution block structure of this utility model;
[0019] Figure 7 This is a cross-sectional view of the material dividing block of this utility model;
[0020] Figure 8 This is a bottom view of the cross-sectional structure of the material dividing block of this utility model.
[0021] Explanation of the numbers in the diagram: 100, grate cooler housing; 101, kiln head hood; 102, fixed end; 1021, concentrating section; 1022, discharge section; 103, moving end; 104, tertiary air duct; 105, rotary kiln; 200, diversion mechanism; 201, material distribution block; 2011, material leakage hole; 2012, discharge hole; 2013, material distribution trough; 2014, side baffle; 2015, upper baffle; 202, guide plate; 2021, discharge port. Detailed Implementation
[0022] like Figures 1 to 8As shown, this utility model relates to a novel energy-saving and low-carbon grate cooler fixed end structure, including a grate cooler housing 100, a rotary kiln 105, and a diversion mechanism 200 disposed within the grate cooler housing 100. The grate cooler housing 100 includes a kiln head hood 101, a fixed end 102, and a moving end 103. The diversion mechanism 200 includes a material distribution block 201 disposed on the fixed end 102. A rectangular opening is formed between the side end of the material distribution block 201 and the inner wall of the fixed end 102. Side baffles 2014 are symmetrically disposed at the front and rear ends of the material distribution block 201, and upper baffles 2015 are symmetrically disposed at the upper end of the material distribution block 201. A guide plate 202 is disposed at the upper end of the material distribution block 201. This invention avoids the uneven distribution of coarse and fine materials along the width of the grate cooler caused by the segregation of clinker after kiln discharge. Secondly, when the clinker flows from the fixed end 102 to the moving end 103, the coarse material will not be concentrated on one side while the fine material is concentrated on the other side. This ensures that the clinker at the fixed end 102 achieves a rapid cooling effect and avoids the phenomenon of local blow-through of clinker, thus guaranteeing the cooling effect and efficiency of cement clinker.
[0023] Specifically, the end of the rotary kiln 105 is located inside the grate cooler housing 100, and a tertiary air duct 104 is provided at the upper part of the side end of the grate cooler housing 100, located above the rotary kiln 105. The tertiary air duct 104 is provided to introduce part of the hot air drawn from the kiln head hood 101 into the decomposition furnace.
[0024] Furthermore, the kiln head hood 101 is the upper part of the grate cooler housing 100, and the fixed end 102 and the moving end 103 are the lower parts of the grate cooler housing 100, with the moving end 103 located in front of the fixed end 102. The cement clinker located at the fixed end 102 can flow to the moving end 103 and then continue to flow forward.
[0025] It is worth noting that the fixed end 102 includes a concentrating section 1021 and a discharging section 1022. The concentrating section 1021 gradually narrows from top to bottom, and the discharging section 1022 is located at the front end of the concentrating section 1021, gradually widening from narrow to wide. The bottom of the fixed end 102 is sloped downwards from front to back. The concentrating section 1021 and the discharging section 1022 of the fixed end 102 form a wide-narrow-wide structure. The wide-narrow-wide design of the fixed end 102 can re-premix the high-temperature cement clinker flowing forward along the length of the grate cooler, ensuring that when the clinker flows from the fixed end 102 to the moving end 103, the coarse material will not be concentrated on one side and the fine material on the other side. This allows the clinker at the fixed end 102 to achieve a rapid cooling effect and avoids the phenomenon of localized blow-through of the clinker, further ensuring the cooling effect and efficiency of the cement clinker.
[0026] It is worth mentioning that the front and rear ends of the material distribution block 201 are both set with slopes, the upper end of the material distribution block 201 is set with an acute angle, and the area of the material distribution block 201 gradually increases from top to bottom. The rear end face of the material distribution block 201 is provided with a material distribution groove 2013, which is radially distributed from top to bottom. The front end face of the material distribution block 201 has equally spaced material leakage holes 2011, which are arc-shaped. The material leakage holes 2011 form a discharge hole 2012 at the lower end of the material distribution block 201. When clinker falls onto the distribution block 201, it will flow along an acute angle to the front and rear ends of the distribution block 201. Some clinker will fall into the distribution trough 2013 on the rear end face of the distribution block 201. The distribution trough 2013 is radially distributed from top to bottom, so that the clinker is dispersed at different angles during the downward flow, achieving preliminary mixing. Another part of the clinker passes through the arc-shaped leakage holes 2011 equidistantly opened on the front end face of the distribution block 201, as well as the discharge holes 2012 formed by the leakage holes 2011. Because the leakage holes 2011 are arc-shaped, the direction and speed of the clinker change when it passes through, which further promotes the mixing of clinker of different particle sizes, so that cement clinker of different particle sizes can fall evenly into the fixed end 102.
[0027] It is worth noting that the guide plate 202 is located directly below the end of the rotary kiln 105. The guide plate 202 is curved upwards from the middle to both sides, and a guide trough is provided at the upper end of the guide plate 202. A discharge port 2021 is opened in the middle of the guide trough, and the discharge port 2021 is located directly above the acute angle at the upper end of the distribution block 201. Because the guide plate 202 is curved upwards from the middle to both sides, and has a guide trough at its upper end, it can initially gather clinker of different particle sizes. The clinker can fall precisely into the acute angle at the upper end of the distribution block 201 through the discharge port 2021 in the middle of the guide trough, thereby cooperating in the diversion and premixing of clinker.
[0028] Working Principle: This embodiment provides a novel energy-saving and low-carbon grate cooler fixed-end structure. During use, the rotary kiln 105 operates continuously, and cement clinker is discharged from the kiln and falls into the grate cooler housing 100. The discharged clinker first falls onto the guide plate 202. Because the guide plate 202 is curved upwards from the middle to both sides, and its upper end is equipped with a guide trough, it can initially gather clinker of different particle sizes. The clinker falls precisely through the discharge port 2021 in the middle of the guide trough to the acute angle at the upper end of the distribution block 201. The upper end of the distribution block 201 is set at an acute angle. When the clinker falls onto the distribution block 201, it will move along the acute angle towards the distribution block. The clinker block 201 has front and rear ends for diversion. Simultaneously, symmetrical upper baffles 2015 at the top of the diversion block 201 prevent excessive scattering of clinker to both sides, ensuring orderly downward flow. Some clinker falls into the diversion trough 2013 on the rear end face of the diversion block 201. The diversion trough 2013 is radially distributed from top to bottom, causing the clinker to disperse at different angles during downward flow, achieving initial mixing. Other clinker exits through arc-shaped leakage holes 2011 equidistantly opened on the front end face of the diversion block 201, and through discharge holes 2012 formed by the leakage holes 2011. Because the leakage holes 2011 are arc-shaped, the clinker passes through... The change in direction and speed further promotes the mixing of clinker of different particle sizes. After being diverted and pre-mixed by the distribution block 201, the clinker can fall into the concentration section 1021 of the fixed end 102. The concentration section 1021 and the discharge section 1022 form a wide-narrow-wide structure. The wide-narrow-wide design of the fixed end 102 can pre-mix the high-temperature cement clinker flowing forward along the length of the grate cooler. This combination ensures that when the clinker flows from the fixed end 102 to the moving end 103, coarse material will not be concentrated on one side and fine material on the other side. Since the area of the fixed grate bed is smaller than the width of the original structure, the surface of the fixed grate bed is larger. The volume is also reduced accordingly, which allows the clinker at the fixed end 102 to achieve rapid cooling while avoiding the phenomenon of localized blow-through of the clinker. Secondly, the rotary kiln 105 has been changed from being arranged parallel to the length direction of the grate cooler to being arranged perpendicular to the length direction of the grate cooler. This method avoids the phenomenon of uneven distribution of coarse and fine materials along the width direction of the grate cooler caused by the segregation of clinker exiting the kiln. Combined with the premixing of the diversion mechanism 200 and the structural design of the fixed end 102, the coarse and fine materials of the cement clinker can be evenly distributed and flow forward, avoiding the phenomenon of short circuit between the red river and the cooling air, and enabling the cement clinker to be cooled quickly.
[0029] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.
Claims
1. A new type of energy-saving and low-carbon grate cooler fixed end structure, characterized in that, The application relates to a rotary kiln and grate cooler shell, which comprises a rotary kiln (105) and a grate cooler shell (100), and a shunting mechanism (200) arranged in the grate cooler shell (100), wherein the grate cooler shell (100) comprises a kiln head cover (101), a fixed end (102) and a moving end (103), the shunting mechanism (200) comprises a shunting block (201) arranged at the fixed end (102), a rectangular port is formed between the side end of the shunting block (201) and the inner wall of the fixed end (102), side baffles (2014) are symmetrically arranged at the front end and the rear end of the shunting block (201), upper baffles (2015) are symmetrically arranged at the upper end of the shunting block (201), and a material guide plate (202) is arranged at the upper end of the shunting block (201).
2. A new type of energy-saving and low-carbon grate cooler fixed end structure according to claim 1, characterized in that, The end of the rotary kiln (105) is located in the grate cooler shell (100), a tertiary air pipe (104) is arranged at the upper position of the side end of the grate cooler shell (100), and the tertiary air pipe (104) is located above the rotary kiln (105).
3. A new type of energy-saving and low-carbon grate cooler fixed end structure according to claim 2, characterized in that, The kiln head cover (101) is the upper part of the grate cooler shell (100), the fixed end (102) and the moving end (103) are the lower part of the grate cooler shell (100), and the moving end (103) is located at the front position of the fixed end (102).
4. A new type of energy-saving and low-carbon grate cooler fixed end structure according to claim 3, characterized in that, The fixed end (102) comprises a concentration part (1021) and a discharge part (1022), the concentration part (1021) gradually narrows from top to bottom, the discharge part (1022) is located at the front end of the concentration part (1021), the discharge part (1022) gradually widens from narrow to wide, and the bottom of the fixed end (102) is provided with a downward inclined surface from front to back.
5. A new type of energy-saving and low-carbon grate cooler fixed end structure according to claim 4, characterized in that, The front end and the rear end of the shunting block (201) are provided with inclined surfaces, the upper end of the shunting block (201) is provided with an acute angle, the area of the shunting block (201) gradually increases from top to bottom, a shunting groove (2013) is arranged on the rear end surface of the shunting block (201), the shunting groove (2013) is radially distributed from top to bottom, a material leakage hole (2011) is equidistantly arranged on the front end surface of the shunting block (201), the material leakage hole (2011) is provided with an arc shape, and the material leakage hole (2011) forms a discharging hole (2012) at the lower end of the shunting block (201).
6. A novel fixed end structure of an energy-saving and low-carbon grate cooler according to claim 5, characterized in that, The material guide plate (202) is located directly below the end of the rotary kiln (105), the material guide plate (202) is provided with an upwardly curved arc shape from the middle to both sides, a material guide groove is arranged at the upper end of the material guide plate (202), and a discharging port (2021) is arranged at the middle position of the material guide groove and located directly above the acute angle of the upper end of the shunting block (201).