Gypsum shunting system for roller press
By adding a redirecting baffle and a distributing baffle to the roller press feeding system, the roller press can be stably operated without reducing the amount of desulfurized gypsum powder added. This solves the problem of unstable operation of the roller press under high temperature conditions and improves the stability and power consumption of the equipment.
Patent Information
- Application Number
- CN202423308855.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the high temperatures of summer, the moisture in desulfurized gypsum powder turns into water vapor, causing unstable operation of the roller press, easily damaging the nitrogen bladder and frame bolts, and causing motor overload and vibration failure. Existing technologies cannot completely solve the problem by reducing the proportion of desulfurized gypsum powder, thus affecting the quality of finished cement.
A deflector baffle is added inside the gypsum discharge chute so that the gypsum falls to one side of the mixing conveyor belt, separating it from the clinker. The gypsum and some of the clinker are then sent to the V-type classifier for drying via the distribution baffle in the feed hopper. The fine powder is sent to the ball mill, and the large particles are sent to the weighing bin of the roller press to control the moisture content of the gypsum and stabilize the operation of the roller press.
By controlling the moisture content of the gypsum, the instability of the roller press under high temperature conditions was eliminated, ensuring stable operation of the roller press, avoiding motor overload and vibration failure, and improving the hourly power consumption index.
Smart Images
Figure CN223818823U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cement processing technology, specifically a gypsum diversion system for a roller press. Background Technology
[0002] Roller presses are important grinding equipment in the cement grinding field. During operation, materials are forcibly fed in from above and crushed and squeezed into dense, flat, dry cakes full of fine cracks under high pressure, which are then discharged into the cake elevator. Desulfurized gypsum powder is an essential raw material in cement grinding, playing a role in retarding. It needs to be weighed and fed into the roller press along with other materials. Due to the characteristics of "high moisture content, fine fineness, and strong viscosity", when the temperature in the cement processing system is high in summer, the moisture in the desulfurized gypsum powder will turn into water vapor. In a high-temperature and gas-filled environment, the fluidity of the fine powder is further enhanced. When passing through the high-pressure area between the two rollers of the roller press, phenomena such as air shock and hopper slippage are likely to occur. The roller gap and current fluctuate violently, resulting in unstable operation. The nitrogen bladder is easily damaged, and the frame bolts are easily loosened. In severe cases, it can also cause the roller press motor to overload, high vibration value, and other faults to shut down. It can only be forced to reduce the pressure and maintain low power operation, which affects the hourly power consumption index.
[0003] The existing solution is to reduce the gypsum ratio in the cement cake and add as little desulfurized gypsum powder as possible. However, actual production on site has shown that this method cannot fundamentally solve the problem. Only by significantly reducing the amount of desulfurized gypsum powder can the operation of the roller press be stabilized. However, significantly reducing the proportion of desulfurized gypsum powder will result in a low sulfur trioxide content in the finished cement, leading to quality accidents, which is not worth the risk. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a gypsum diversion system for roller presses that achieves stable operation of roller presses without reducing the amount of desulfurized gypsum powder added.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A gypsum distribution system for a roller press includes a gypsum conveyor belt, a gypsum discharge chute at the end of the gypsum conveyor belt, a mixing conveyor belt connected below the gypsum discharge chute, a feeding hopper at the end of the mixing conveyor belt, a clinker discharge chute connected below the feeding hopper, and the clinker discharge chute connected below the inlet of the roller press weighing bin. A deflector baffle is installed inside the gypsum discharge chute, causing the gypsum to concentrate and fall onto one side of the mixing conveyor belt, separating it from the clinker on the mixing conveyor belt. A distribution baffle is installed inside the feeding hopper, and the clinker discharge chute is connected to the lower end of the feeding hopper and located on one side of the distribution baffle. The lower end of the feeding hopper, located on the other side of the distribution baffle, is connected to the mixing discharge chute. The clinker discharge chute sends clinker without gypsum mixture into the roller press weighing bin, while the mixing discharge chute sends clinker mixed with gypsum into a V-type classifier.
[0007] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:
[0008] This invention adds a redirecting baffle inside the gypsum feeding chute, causing the gypsum to fall concentrated on one side of the mixing conveyor belt, changing the previous state of the gypsum being spread evenly. A distribution baffle in the feeding hopper allows the gypsum and some clinker to be fed into a V-type classifier through the mixing feeding chute, where fine powder is screened out and dried. The large dried particles are then sent to the weighing bin of a roller press, while the fine dried powder is sent to a ball mill. This reduces the moisture content of the gypsum entering the weighing bin of the roller press, effectively controlling the gas content during the roller press's operation. It eliminates the adverse effects of high-moisture desulfurized gypsum in hot summer weather on the roller press system, resulting in more stable roller press operation.
[0009] As a preferred embodiment, a further technical solution of this utility model is:
[0010] Preferably, the upper edge of the redirecting baffle is hinged to the gypsum discharge chute and located near the first side wall of the gypsum discharge chute; it also includes a first adjusting screw, the first side wall of the gypsum discharge chute is provided with a first threaded hole, the first adjusting screw passes through the first threaded hole into the gypsum discharge chute, and the end of the first adjusting screw abuts against the side wall of the redirecting baffle; by rotating the first adjusting screw, the redirecting baffle can be rotated around the hinge point, thereby changing the width of the gypsum falling onto the mixing conveyor belt.
[0011] Preferably, a first bushing is provided on the first sidewall, and two second bushings are provided at intervals corresponding to the first bushing on the redirection baffle. A continuous hinge shaft is passed through the first bushing and the two second bushings.
[0012] Preferably, the material distribution baffle includes a first material distribution plate and a second material distribution plate, with the first material distribution plate located on the upper side and the second material distribution plate located on the lower side; the feeding hopper is divided into upper and lower parts corresponding to the first and second material distribution plates, with the second material distribution plate vertically arranged and the lower part of the feeding hopper divided into a first receiving bin and a second receiving bin, the first receiving bin being connected to the mixing discharge chute and the second receiving bin being connected to the clinker discharge chute; the first and second material distribution plates are set at a preset angle, corresponding to the mixing conveyor belt, dividing the mixing conveyor belt into a left and a right part along the width direction, with the left part corresponding to the first receiving bin and the right part corresponding to the second receiving bin; the angle between the second and first material distribution plates is adjusted according to the width ratio of gypsum on the mixing conveyor belt, so that the left and right parts correspond to the first and second receiving bins respectively.
[0013] Preferably, the first and second material distribution plates are connected by a spring hinge, and the angle between the first and second material distribution plates is 180° when there is no external force. It also includes a second adjusting screw, and a second threaded hole is provided on one side wall of the feeding hopper. The second adjusting screw passes through the second threaded hole into the feeding hopper. The first material distribution plate is provided with a vertical elongated hole, and the end of the second adjusting screw passes through the vertical elongated hole. A limiting plate is provided on each side of the vertical elongated hole. By rotating the second adjusting screw, the first material distribution plate can be pushed forward or pulled backward by the two limiting plates, thereby adjusting the included angle between the first and second material distribution plates. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the gypsum distribution system for the roller press in this embodiment of the present invention;
[0015] Figure 2 This is a schematic diagram of the installation structure of the redirection baffle in an embodiment of this utility model;
[0016] Figure 3 This is a schematic diagram of the installation structure of the material distribution baffle in an embodiment of this utility model;
[0017] Figure 4 This is a schematic diagram of the material distribution baffle in an embodiment of this utility model.
[0018] Explanation of reference numerals in the attached drawings: 1. Gypsum conveyor belt; 2. Gypsum discharge chute; 3. Mixing conveyor belt; 4. Feed hopper; 5. Clinker discharge chute; 6. Diverting baffle; 7. Dividing baffle; 701. First dividing plate; 7011. Vertical elongated hole; 702. Second dividing plate; 8. Mixing discharge chute; 9. First adjusting screw; 10. First rotating handle; 11. First bushing; 12. Second bushing; 13. Hinge shaft; 14. Second adjusting screw; 15. Second rotating handle; 16. Limiting plate; 17. Clinker mixed with gypsum; 18. Clinker without gypsum; 19. Belt cleaner. Detailed Implementation
[0019] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.
[0020] Roller presses are important grinding equipment in the cement grinding field. Roller presses have strict requirements on the particle size of the fed material. They are "only good for coarse materials" because feeding too much fine powder will cause a series of problems such as vibration and hopper collapse (collapse of the weighing hopper). In the existing technology, the roller press feeding system includes a gypsum conveyor belt 1, a gypsum discharge chute 2 at the end of the gypsum conveyor belt 1, a mixing conveyor belt 3 connected to the end of the mixing conveyor belt 3, a feeding hopper 4 at the end of the mixing conveyor belt 3, a clinker discharge chute 5 connected to the end of the feeding hopper 4, and the clinker discharge chute 5 connected to the inlet of the roller press weighing hopper. Desulfurized gypsum powder is an essential raw material in cement grinding, playing a retarding role. Due to its characteristics of high moisture content, fine particle size, and strong viscosity, it is often fed into the roller press along with other materials. In summer, when the system operating temperature is high, the increased fluidity of the desulfurized gypsum powder, when passing through the high-pressure area between the roller press rollers, can lead to unstable operation of the roller press, damage to the nitrogen bladder, loosening of frame bolts, and in severe cases, overload of the roller press motor, high vibration levels, and other malfunctions causing shutdown. To address this phenomenon, [further measures should be taken]. Figures 1 to 4As shown, this embodiment provides a gypsum diversion system for a roller press. A redirecting baffle 6 is added to the gypsum discharge chute of the original roller press feeding system. The redirecting baffle 6 causes the gypsum to concentrate and fall onto one side of the mixing conveyor belt 3, separating it from the clinker on the mixing conveyor belt 3. For example, when the width of the mixing conveyor belt 3 is 1000mm, after setting the redirecting baffle 6, the gypsum material falls from the end of the gypsum conveyor belt 1 into the gypsum discharge chute 2, slides down along the redirecting baffle 6, and falls to the 0-500mm width position on the left side of the mixing conveyor belt 3. Furthermore, a distribution baffle 7 is added to the feeding hopper 4. The clinker discharge chute 5 is connected to the lower end of the feeding hopper 4 and located on one side of the distribution baffle 7. The lower end of the feeding hopper 4 is located on the other side of the distribution baffle 7 and connected to the mixing discharge chute 8. This allows the gypsum material to fall... Taking the position 0-500mm wide on the left side of the mixing conveyor belt 3 as an example, after passing through the distribution baffle 7, the gypsum-mixed clinker 17 on the mixing conveyor belt 3 at the 0-500mm wide position will enter the mixing discharge chute 8, and then enter the circulating bucket elevator. The circulating bucket elevator will feed the clinker 17 into the V-type powder classifier, which will dry the clinker 17 mixed with gypsum. The selected fine powder will be sent to the ball mill, and the remaining dried clinker 17 mixed with gypsum will be sent to the weighing bin of the roller press. After passing through the distribution baffle 7, another part of the clinker 18 without gypsum will enter the clinker discharge chute 5. The clinker discharge chute 5 will directly send the clinker 18 without gypsum into the weighing bin of the roller press, and together with the dried clinker 17 mixed with gypsum, they will be fed into the roller and extruded into a cake. This reduces the moisture content in the gypsum, preventing the high moisture content in the desulfurized gypsum powder during hot summer months from evaporating into water vapor. The high temperature and gas-filled environment then accelerates the flow of fine powder, causing instability in the roller press. In this embodiment, the clinker 18, which is not mixed with gypsum, may also contain materials such as slag and limestone, depending on the type of cement to be produced.
[0021] The upper edge of the redirecting baffle 6 is hinged to the gypsum discharge chute 2 and is located near the first side wall of the gypsum discharge chute 2. It also includes a first adjusting screw 9. A first threaded hole is provided on the first side wall of the gypsum discharge chute 2. The first adjusting screw 9 passes through the first threaded hole into the gypsum discharge chute 2, and its end abuts against the side wall of the redirecting baffle 6. When it is necessary to adjust the width of the gypsum material falling onto the mixing conveyor belt 3, the first adjusting screw 9 is rotated to make the redirecting baffle 6 rotate around the hinge axis to a suitable position. Adjusting the angle of the redirecting baffle 6 by the first adjusting screw 9 concentrates the gypsum distribution on one side of the mixing conveyor belt 3, controlling the width of the gypsum surface on the mixing conveyor belt 3. This is to prepare for the gypsum diversion adjustment at the head of the downstream mixing conveyor belt 3.
[0022] The hinged connection structure of the deflector baffle 6 is as follows: a first bushing 11 is provided on the first side wall, and two second bushings 12 are provided on the deflector baffle 6 at intervals corresponding to the first bushing 11. A continuous hinge shaft 13 is passed through the first bushing 11 and the two second bushings 12.
[0023] The material distribution baffle 7 includes a first material distribution plate 701 and a second material distribution plate 702. The first material distribution plate 701 is located on the upper side, and the second material distribution plate 702 is located on the lower side. The feeding hopper 4 is divided into upper and lower parts corresponding to the first material distribution plate 701 and the second material distribution plate 702. The second material distribution plate 702 is set vertically and divides the lower part of the feeding hopper 4 into a first receiving bin and a second receiving bin. The first receiving bin is connected to the mixing discharge chute 8, and the second receiving bin is connected to the clinker discharge chute 5. The first material distribution plate 701 and the second material distribution plate 702 are set at a preset angle, corresponding to the mixing conveyor belt 3. The mixing conveyor belt 3 is divided into a left part and a right part along the width direction. The left part corresponds to the first receiving bin, and the right part corresponds to the second receiving bin. The first material distribution plate 701 and the second material distribution plate 702 are connected by a spring hinge. Under no external force, the first material distribution plate 701 and the second material distribution plate 702 are 180° apart. It also includes a second adjusting screw 14. A second threaded hole is provided on one side wall of the feeding hopper 4. The second adjusting screw 14 passes through the second threaded hole into the feeding hopper 4. The first material distribution plate 701 is provided with a vertical elongated hole 7011. The end of the second adjusting screw 14 passes through the vertical elongated hole 7011. A limiting plate 16 is provided on each side of the vertical elongated hole 7011. By adjusting the rotation angle of the first material distribution plate 701, it is possible to realize that all the materials on the mixing conveyor belt 3 enter the circulating bucket elevator, or all of them enter the weighing bin of the roller press, or part of them enter the circulating bucket elevator and part of them enter the weighing bin of the roller press. In this embodiment, when the width of the gypsum material falling to the left side of the mixing conveyor belt 3 decreases, the second adjusting screw 14 is rotated and slides upward along the vertical elongated hole 7011. At the same time, the two limiting plates 16 pull the first distributing plate 701 to rotate to the left. When the width of the gypsum material falling to the left side of the mixing conveyor belt 3 increases, the second adjusting screw 14 is rotated and slides downward along the vertical elongated hole 7011. At the same time, the two limiting plates 16 push the first distributing plate 701 to rotate to the right.
[0024] To facilitate the rotation of the first adjusting screw 9 and the second adjusting screw 14 by the staff, a first rotating handle 10 is provided at the outer end of the first adjusting screw 9, and a second rotating handle 15 is provided at the outer end of the second adjusting screw 14.
[0025] To ensure that all the material on the mixing conveyor belt 3 falls into the feeding hopper 4, a belt cleaner 19 is installed at the end of the belt conveyor of the mixing conveyor belt 3. The belt cleaner 19 is the same as the existing technology.
[0026] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.
Claims
1. A gypsum distribution system for a roller press, comprising a gypsum conveyor belt, a gypsum discharge chute at the end of the gypsum conveyor belt, a mixing conveyor belt connected below the gypsum discharge chute, a feeding hopper at the end of the mixing conveyor belt, a clinker discharge chute connected below the feeding hopper, and a clinker discharge chute connected below the clinker discharge chute to the inlet of the roller press weighing bin, characterized in that: The gypsum discharge chute is equipped with a deflector baffle, which causes the gypsum to fall onto one side of the mixing conveyor belt. The feeding hopper is equipped with a material distribution baffle. The clinker discharge chute is connected to the lower end of the feeding hopper and is located on one side of the material distribution baffle. The lower end of the feeding hopper is located on the other side of the material distribution baffle and is connected to the mixing discharge chute. The clinker discharge chute sends the clinker without gypsum into the weighing bin of the roller press, and the mixing discharge chute sends the clinker mixed with gypsum into the V-type classifier.
2. The gypsum distribution system for a roller press according to claim 1, characterized in that: The upper edge of the deflector baffle is hinged to the gypsum discharge chute and is located near the first side wall of the gypsum discharge chute; It also includes a first adjusting screw. A first threaded hole is provided on the first side wall of the gypsum discharge chute. The first adjusting screw passes through the first threaded hole into the gypsum discharge chute, and the end of the first adjusting screw abuts against the side wall of the redirecting baffle.
3. The gypsum distribution system for a roller press according to claim 2, characterized in that: A first bushing is provided on the first side wall, and two second bushings are provided at intervals on the deflector baffle corresponding to the first bushing. A continuous hinge shaft is passed through the first bushing and the two second bushings.
4. The gypsum distribution system for a roller press according to claim 1, characterized in that: The material distribution baffle includes a first material distribution plate and a second material distribution plate, with the first material distribution plate located on the upper side and the second material distribution plate located on the lower side; The feeding hopper is divided into upper and lower parts corresponding to the first and second material distribution plates. The second material distribution plate is set vertically and divides the lower part of the feeding hopper into the first receiving bin and the second receiving bin. The first receiving bin is connected to the mixing discharge chute, and the second receiving bin is connected to the clinker discharge chute. The first and second material distribution plates are set at a preset angle and correspond to the mixing conveyor belt. The mixing conveyor belt is divided into left and right parts along the width direction. The left part corresponds to the first receiving bin, and the right part corresponds to the second receiving bin.
5. The gypsum distribution system for a roller press according to claim 4, characterized in that: The first and second dividing plates are connected by spring hinges. When there is no external force, the included angle between the first and second dividing plates is 180°. It also includes a second adjusting screw, a second threaded hole on one side wall of the feeding hopper, the second adjusting screw passing through the second threaded hole into the feeding hopper, a vertical elongated hole on the first material distribution plate, the end of the second adjusting screw passing through the vertical elongated hole, and a limiting plate on each side of the vertical elongated hole.