Cement clinker bleaching device

Abstract

The utility model discloses a cement clinker bleaching device which comprises a machine body, a feeding pipe is installed at the top of the machine body and communicated with an external rotary kiln, bearings are arranged on the left side and the right side of the machine body respectively, and a first stirring shaft and a second stirring shaft are arranged on the bearings on the two sides respectively. According to the cement clinker bleaching device, the heating cavity is formed in the bleaching machine, the cold water is injected into the heating cavity, the cold water can absorb heat carried by clinker in the bleaching process, and heat can be supplied to equipment such as a boiler after the cold water absorbs heat, so that the utilization rate of waste heat of the clinker is increased, and further, the utilization rate of waste heat of the clinker is increased. After the clinker is bleached, the temperature of the clinker is still 200 DEG C or above, residual waste heat in the clinker can be recycled again through a subsequent waste heat recycling assembly, and the recycled heat energy is directly fed into a kiln opening of the rotary kiln to be used by the rotary kiln.

Description

Technical Field

[0001] This utility model relates to the field of cement production technology, specifically to a cement clinker bleaching device. Background Technology

[0002] During cement production, the iron in the clinker reacts with hydrogen peroxide, calcium oxide, and other substances at high temperatures to form colored substances such as iron oxide. These colored substances are then reduced and decomposed by bleaching agents, thus bleaching the cement.

[0003] The current problems in cement bleaching are as follows: First, the temperature of clinker coming out of the rotary kiln is as high as 1300 degrees Celsius. Even after bleaching, the temperature of the clinker is still 300-400 degrees Celsius. The residual heat carried by the clinker is not utilized properly, resulting in resource waste. Second, the existing bleaching process generally involves setting up a water spray pipe in the bleaching machine. The bleaching agent is sprayed out from the pipe and mixed with the clinker to achieve the bleaching purpose. However, the existing method makes the bleaching agent and clinker not mixed evenly, so the bleaching efficiency is not ideal. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a cement clinker bleaching device, which solves the problems of low heat recovery efficiency and low bleaching efficiency in existing cement bleaching devices.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a cement clinker bleaching device, comprising a machine body, a feed pipe installed on the top of the machine body, the feed pipe being connected to an external rotary kiln, bearings being provided on both the left and right sides of the machine body, a first stirring shaft and a second stirring shaft being respectively provided on the bearings on both sides, one end of the first stirring shaft and the second stirring shaft extending to the outside of the machine body and being connected to an external rotary joint, and a water inlet pipe being provided on one side of the rotary joint.

[0008] Both the first and second stirring shafts are hollow structures, and both have injection holes.

[0009] Both the first and second stirring shafts are equipped with gear rings on the parts located outside the machine body. A motor is installed on the outside of the machine body, and a gear is installed at the output end of the motor, which meshes with the gear ring.

[0010] The machine body is also equipped with a heating chamber, which has an inlet and an outlet.

[0011] The bottom of the machine body is equipped with a discharge pipe, which is connected to an external waste heat recovery component.

[0012] As a further preferred embodiment, the waste heat recovery assembly includes a recovery chamber with a rotatable tilting shaft inside. The bottom of the recovery chamber has a discharge port, and a waste heat recovery pipe is installed on the recovery chamber. A dust collector is installed on the waste heat recovery pipe, and the end of the waste heat recovery pipe is connected to the air inlet of the rotary kiln.

[0013] As a further preferred embodiment, the inner wall of the recovery chamber is coated with a thermal insulation coating.

[0014] As a further preferred embodiment, a sleeve is provided on the upper part of the inner wall of the machine body, and a spring is provided inside the sleeve. One end of the spring is connected to a ball head that can extend to the outside of the sleeve, and both the first stirring shaft and the second stirring shaft can collide with the ball head during rotation.

[0015] (III) Beneficial Effects

[0016] This utility model provides a cement clinker bleaching device. It has the following beneficial effects:

[0017] This cement clinker bleaching device incorporates a heating chamber within the bleaching machine, into which cold water is injected. This cold water absorbs the heat carried by the clinker during the bleaching process and can then supply heat to equipment such as boilers, thereby improving the utilization rate of clinker waste heat. Furthermore, even after bleaching, the clinker temperature remains above 200 degrees Celsius. Subsequent waste heat recovery components can further recover the residual heat from the clinker, directly feeding it into the rotary kiln. Even further, by incorporating two pairs of hollow stirring shafts, the clinker is thoroughly stirred. Simultaneously, the bleaching agent is sprayed directly from the stirring shafts, allowing for more complete bonding with the clinker, thus enhancing bleaching efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an enlarged view of the structure at point A of this utility model.

[0020] In the diagram: 1. Machine body; 2. Feed pipe; 3. Bearing; 4. First stirring shaft; 5. Second stirring shaft; 6. Spray hole; 7. Gear ring; 8. Motor; 9. Gear; 10. Rotary joint; 11. Water inlet pipe; 12. Heating chamber; 13. Water inlet; 14. Water outlet; 15. Discharge pipe; 16. Recovery chamber; 17. Discharge port; 18. Tilting shaft; 19. Waste heat recovery pipe; 20. Dust collector; 21. Thermal insulation coating; 22. Sleeve; 23. Spring; 24. Ball head. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-2 As shown, this utility model provides a technical solution: a cement clinker bleaching device, including a body 1, a feed pipe 2 installed on the top of the body 1, the feed pipe 2 being connected to an external rotary kiln, bearings 3 being provided on both the left and right sides of the body 1 (the contact points between the bearings 3 and the body 1 need to be sealed), a first stirring shaft 4 and a second stirring shaft 5 being respectively provided on the bearings 3 on both sides, one end of the first stirring shaft 4 and the second stirring shaft 5 extending to the outside of the body 1 and being connected to an external rotary joint 10, a water inlet pipe 11 being provided on one side of the rotary joint 10 (the bleaching agent needs to be pressurized before being sent into the water inlet pipe 11, and the water inlet pipe 11 is equipped with a switch valve).

[0023] Both the first stirring shaft 4 and the second stirring shaft 5 are hollow structures, and both the first stirring shaft 4 and the second stirring shaft 5 are provided with spray holes 6 (a filter screen with a hole diameter of less than 0.3 mm needs to be installed at the spray hole 6 to prevent clinker from entering).

[0024] Both the first stirring shaft 4 and the second stirring shaft 5 are equipped with gear rings 7 on the parts located outside the machine body 1. A motor 8 is provided on the outside of the machine body 1, and a gear 9 is installed at the output end of the motor 8. The gear 9 meshes with the gear ring 7.

[0025] A sleeve 22 is provided on the upper part of the inner wall of the machine body 1. A spring 23 is provided inside the sleeve 22. One end of the spring 23 is connected to a ball head 24 that can extend to the outside of the sleeve 22. The first stirring shaft 4 and the second stirring shaft 5 can collide with the ball head 24 during rotation (after the collision, the ball head 24 can be reset under the deformation of the spring 23). During the rotation of the first stirring shaft 4 and the second stirring shaft 5, they will contact and collide with the ball head 24. When they collide, the first stirring shaft 4 and the second stirring shaft 5 will vibrate to a certain extent, thereby shaking off the clinker adsorbed on them and preventing the clinker from sticking together.

[0026] The machine body 1 is also equipped with a heating chamber 12, and the heating chamber 12 is equipped with a water inlet 13 and a water outlet 14 (both the water inlet and the water outlet are equipped with a switch valve).

[0027] The bottom of the machine body 1 is provided with a discharge pipe 15 (equipped with a switch valve), which is connected to an external waste heat recovery component.

[0028] The waste heat recovery assembly includes a recovery chamber 16, the inner wall of which is coated with a heat insulation coating 21 to prevent heat loss (heat insulation paint can be used). A rotatable tilting shaft 18 is installed inside the recovery chamber 16. A discharge port 17 (equipped with a switch valve) is installed at the bottom of the recovery chamber 16. A waste heat recovery pipe 19 is installed on the recovery chamber 16. A dust collector 20 is installed on the waste heat recovery pipe 19. The dust absorbed by the dust collector 20 can be reused. The end of the waste heat recovery pipe 19 is connected to the air inlet of the rotary kiln, and hot air can compensate for the air inlet temperature.

[0029] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0030] In use, cement clinker is discharged from the rotary kiln (not shown in the figure) and enters the machine body 1 through the feed pipe 2. The motor 8 is turned on, and the first stirring shaft 4 and the second stirring shaft 5 can be driven to rotate through the gear 9 and the gear ring 7 (the two rotate in opposite directions to make the mixing more thorough), thereby stirring the clinker.

[0031] After being pressurized, the bleaching agent enters the first stirring shaft 4 and the second stirring shaft 5 through the water inlet pipe 11 and the rotary joint 10, and is sprayed out at high speed from the spray hole 6 on them, which mixes thoroughly with the clinker and achieves the purpose of bleaching under continuous stirring.

[0032] Cold water is injected into the heating chamber 12 through the inlet 13. During the bleaching process, the cold water absorbs heat from the clinker. After absorbing heat, the cold water is discharged through the outlet 14 and supplied to equipment such as boilers.

[0033] After bleaching, the clinker enters the recovery chamber 16 through the discharge pipe 15. The external motor drives the flipping shaft 18 to rotate, thereby spreading the clinker. The residual heat energy in the clinker is absorbed through the waste heat recovery pipe 19. After the hot air is removed by the dust collector 20, it is sent to the air inlet of the rotary kiln to reheat the rotary kiln.

[0034] In summary, this cement clinker bleaching device, by setting up a heating chamber inside the bleaching machine and injecting cold water into the heating chamber, allows the cold water to absorb the heat carried by the clinker during the bleaching process. After absorbing heat, the cold water can supply heat to equipment such as boilers, thereby improving the utilization rate of clinker waste heat. Furthermore, the temperature of the clinker after bleaching is still above 200 degrees Celsius, and the residual waste heat in the clinker can be recovered again through subsequent waste heat recovery components. The recovered heat energy is directly sent to the rotary kiln inlet for the rotary kiln to utilize. Even further, by setting up two pairs of hollow stirring shafts, the clinker can be fully stirred. At the same time, the bleaching agent is sprayed directly from the stirring shafts, which can more fully combine with the clinker, thereby improving the bleaching efficiency.

[0035] It should be noted that all electrical components mentioned in this article are electrically connected to an external main controller and 220V or 380V AC mains power. The main controller can be a conventional, known device such as a computer, and its control principles, internal structure, and control switching methods are all conventional methods of existing technology. These are directly cited here without further elaboration. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cement clinker bleaching device, characterized in that: Includes a machine body (1), on the top of which is a feed pipe (2) connected to an external rotary kiln. Bearings (3) are provided on both the left and right sides of the machine body (1). A first stirring shaft (4) and a second stirring shaft (5) are respectively provided on the bearings (3) on both sides. One end of the first stirring shaft (4) and the second stirring shaft (5) extends to the outside of the machine body (1) and is connected to an external rotary joint (10). A water inlet pipe (11) is provided on one side of the rotary joint (10). Both the first stirring shaft (4) and the second stirring shaft (5) are hollow structures, and both the first stirring shaft (4) and the second stirring shaft (5) are provided with injection holes (6); The first stirring shaft (4) and the second stirring shaft (5) are both equipped with gear rings (7) on the parts located outside the machine body (1). A motor (8) is provided on the outside of the machine body (1). A gear (9) is installed at the output end of the motor (8). The gear (9) meshes with the gear ring (7). The body (1) is also provided with a heating chamber (12), and the heating chamber (12) is provided with a water inlet (13) and a water outlet (14); The bottom of the machine body (1) is provided with a discharge pipe (15), which is connected to an external waste heat recovery component.

2. The cement clinker bleaching device according to claim 1, characterized in that: The waste heat recovery assembly includes a recovery chamber (16), which is equipped with a rotatable flipping shaft (18). The bottom of the recovery chamber (16) is provided with a discharge port (17). A waste heat recovery pipe (19) is provided on the recovery chamber (16). A dust collector (20) is provided on the waste heat recovery pipe (19). The end of the waste heat recovery pipe (19) is connected to the air inlet of the rotary kiln.

3. The cement clinker bleaching device according to claim 2, characterized in that: The inner wall of the recovery chamber (16) is coated with a thermal insulation coating (21).

4. The cement clinker bleaching device according to claim 1, characterized in that: The upper part of the inner wall of the machine body (1) is provided with a sleeve (22), and a spring (23) is provided inside the sleeve (22). One end of the spring (23) is connected to a ball head (24) that can extend to the outside of the sleeve (22). The first stirring shaft (4) and the second stirring shaft (5) can collide with the ball head (24) during rotation.

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