Novel heater spiral rotor wing

Abstract

The utility model discloses a novel heater spiral rotor wing, and belongs to the technical field of papermaking processes. The utility model relates to a novel spiral rotor wing of a heater, which comprises a conveying spiral sheet fixedly connected in a feeding area of a rotating shaft, crushing and stirring blades fixedly connected in a radial symmetric manner in a mixing area of the rotating shaft, and a propelling blade fixedly connected on the rotating shaft between two adjacent crushing and stirring blades. Therefore, the technical problem that the slurry is deposited due to the fact that the slurry cannot be pushed in time after being crushed is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of papermaking technology, and more specifically relates to a novel heater spiral rotor. Background Art

[0002] The structure of heat dispersion rapid heater for papermaking is as follows Figure 1 As shown, the working principle is that the pulp with a dryness of 25% to 35% from the upstream system components enters the interior of the heater through the inlet. In the inlet section, the spiral conveying blade 2 is connected to the rotating shaft 10. With the help of this conveying screw, the pulp is conveyed from the inlet section to the outlet. Through the steam nozzle, steam is injected into the interior from both sides of the machine housing to heat the pulp. In addition, chemicals can be injected into the interior of the machine through the chemical nozzle. With the help of the crushing and stirring blade 2, the steam and chemicals are uniformly mixed with the pulp on the way through the mixing zone. In this process, the high-concentration pulp is stirred and broken into thin flakes. Finally, the pulp falls through the outlet and enters the downstream process unit from there. After the axially conveyed pulp exceeds the outlet, it is conveyed back to the outlet by two reverse push blades located on the rotor.

[0003] The existing heat dispersion rapid heater only relies on two turns of double conveying spiral blades 2 in the inlet area to carry out slurry transportation. The subsequent crushing and stirring blades 1 are rod-shaped structures with V-shaped ends. They mainly play the role of stirring and crushing, and the propulsion function is limited, especially the central area of ​​the shaft has almost no propulsion function. In this way, when the output is high, the slurry will accumulate, which not only causes uneven heating, but also increases the equipment load and unstable operation. Utility Model Content

[0004] 1. Problem to be solved

[0005] In view of the problem of slurry silting in the thermal dispersion rapid heater in the prior art, the utility model provides a new type of heater spiral rotor. The utility model uses a propulsion blade fixedly connected to the rotating shaft between two crushing and stirring blades to push the material forward in time after crushing, thereby achieving the technical effect of pushing the material in time to avoid silting.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0008] A novel heater spiral rotor includes a conveying spiral blade fixedly connected to the feeding zone of the rotating shaft, and a radially symmetrically fixedly connected crushing and stirring blade in the mixing zone of the rotating shaft. It also includes a propulsion blade fixedly connected to the rotating shaft between two adjacent crushing and stirring blades. After the slurry is crushed, it is pushed to the discharge end in time by the propulsion blade to avoid slurry accumulation.

[0009] A further technical solution is that the propulsion blade includes a spiral panel and a plate base that are integrally connected; the spiral panel is a fan-shaped structure with a spiral angle, the spiral fan pushes the material, and the pushing efficiency is high, and it is fixed to the rotating shaft by being connected to the plate base at the bottom; the direction of rotation of the spiral angle is consistent with that of the conveying spiral blade to avoid reverse feeding.

[0010] According to a further technical solution, the spiral panel and the vertical plane of the rotating shaft form an angle of 25° to 35° along the rotation direction, and the spiral panel is tilted backward by 10° to 20° along the axis of the rotating shaft.

[0011] A further technical solution is to promote the spraying of a wear-resistant material layer on the blade surface to increase its service life.

[0012] A further technical solution is that the height of the propulsion blade is lower than that of the crushing and mixing blade, which cooperates with the limited pushing effect of the crushing and mixing blade to increase the propulsion surface and thus improve the propulsion efficiency.

[0013] 3. Beneficial effects

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The new type of heater spiral rotor of the utility model can continuously propel the slurry toward the outlet direction to avoid slurry accumulation, and can propel the slurry at the center of the shaft toward the outer edge of the shell. The slurry in the center can contact the crushing and stirring blades better and faster, so that steam heating and chemicals can be faster and more uniform. Without destroying the original structure of the equipment, the manufacturing and processing is simple, the practicability is strong, the heating efficiency is high, and the equipment operation is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the spiral rotor structure of a heater in the prior art;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the spiral rotor of the novel heater according to a specific embodiment.

[0018] Figure 3 It is a schematic diagram of the spiral rotor structure of a novel heater in a specific embodiment;

[0019] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure;

[0020] Figure 5 It is a schematic diagram of the propulsion blade structure of a specific embodiment;

[0021] Figure 6 Current curves for the effects of using existing heater helical rotors;

[0022] Figure 7This is a current curve diagram of the effect of using the improved new heater spiral rotor.

[0023] In the figure: 1. Crushing and stirring blades; 2. Conveying spiral blades; 3. Propelling blades; 31. Plate base; 32. Spiral panel; 10. Rotating shaft. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with specific embodiments.

[0025] Example 1

[0026] The novel heater spiral rotor of this embodiment, such as Figure 2 , 3 4, including a conveying spiral blade 2 fixedly connected to the feeding zone of the rotating shaft 10, and a radially symmetrically fixedly connected crushing and stirring blade 1 in the mixing zone of the rotating shaft 10, a total of 12 groups of side-by-side crushing and stirring blades 1, each group of which is 2 symmetrical Y-shaped crushing and stirring blades 1; the crushing and stirring blades 1 of two adjacent groups are staggered; and also include a propulsion blade 3 fixedly connected to the rotating shaft 10 between two adjacent crushing and stirring blades 1, such as Figure 3 The red part in the figure has a total of 24 red propulsion blades 3. The fixed connection is completed by welding, and the spiral is dynamically balanced after welding.

[0027] In the specific application of the novel heater spiral rotor of this embodiment, after the slurry is stirred and crushed by the crushing and stirring blade 1, it is promptly pushed to the discharge end of the rotating shaft 10 by the propulsion blade 3, so as to avoid the slurry from silting up. Moreover, it does not damage the original equipment, has a simple structure, is practical, efficient, safe, easy to operate, has low cost, and is easy to promote.

[0028] Example 2

[0029] The new heater spiral rotor of this embodiment has the same basic structure as that of embodiment 1, but the difference or improvement is that the propulsion blade 3 includes a spiral panel 32 and a plate base 31 which are integrally connected and formed; the spiral panel 32 is a fan-shaped structure with a spiral angle, and the overall shape is similar to the character "convex", with an outer arc length of 260mm, a center width of 110mm, and a width of 65mm on both sides; the spiral fan pushes the material, and the pushing efficiency is high, and it is fixedly connected to the rotating shaft 10 through the plate base 31 connected to its bottom, and can be fixedly connected by welding; the direction of rotation of the spiral angle is consistent with that of the conveying spiral blade 2 to avoid reverse feeding. The spiral panel 32 and the vertical plane of the rotating shaft 10 form an angle of 25° to 35° along the rotation direction, preferably 30°, which determines the axial propulsion efficiency, and the spiral panel 32 is tilted backward along the axial direction of the rotating shaft 10 by 10° to 20°, preferably 15°. This angle determines the radial propulsion efficiency, and the angle should not be too high or too low. Too low affects the propulsion efficiency, and too high will not be broken in time. The surface of the propulsion blade 3 is sprayed with a wear-resistant material layer to increase its service life. The height of the propulsion blade 3 is lower than that of the crushing and stirring blade 1, and cooperates with the limited pushing effect of the crushing and stirring blade 1 to increase the propulsion surface, thereby improving the propulsion efficiency; Figure 7 and 6 The comparison of the current curves shows that it can also play a role in promoting the transportation of slurry in a stable and uniform manner, thereby solving the problem of current rise and system tripping caused by slurry accumulation in the heater cavity when the output is high, and at the same time make the heating more uniform.

[0030] The examples described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A novel heater spiral rotor, comprising a conveying spiral blade (2) fixedly connected to the feed zone of the rotating shaft (10), and a crushing and stirring blade (1) fixedly connected in a radially symmetrical manner to the mixing zone of the rotating shaft (10), characterized in that: It also includes a propulsion blade (3) fixedly connected to the rotating shaft (10) between two adjacent crushing and stirring blades (1).

2. The novel heater spiral rotor according to claim 1 is characterized in that: The propulsion blade (3) comprises a spiral panel (32) and a plate base (31) which are integrally connected and formed; the spiral panel (32) is in a fan-shaped structure with a spiral angle, and is fixedly connected to the rotating shaft (10) by connecting to the plate base (31) at its bottom; the direction of rotation of the spiral angle is consistent with that of the conveying spiral blade (2).

3. The novel heater spiral rotor according to claim 2 is characterized in that: The spiral panel (32) forms an angle of 25° to 35° with the vertical plane of the rotating shaft (10) along the rotation direction, and the spiral panel (32) is tilted backward by 10° to 20° along the axial direction of the rotating shaft (10).

4. The novel heater spiral rotor according to claim 1 is characterized in that: The surface of the propulsion blade (3) is sprayed with a wear-resistant material layer.

5. The novel heater spiral rotor according to any one of claims 1 to 4, characterized in that: The propulsion blade (3) is lower in height than the crushing and stirring blade (1).

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