Heating device for slushing tank

Abstract

The utility model discloses a slushing tank heating device which comprises a secondary steam pipe, the secondary steam pipe extends to the lower portion of a slushing tank from one side of the slushing tank and penetrates through the side wall of the slushing tank to extend into the slushing tank, a steam ejector is arranged at the tail end of the secondary steam pipe, and a nozzle of the steam ejector faces upwards. And a protective sleeve is sleeved outside the part, positioned in the slushing tank, of the secondary steam pipe. The secondary steam pipe extends into the slushing tank from the lower part of the outer side of the slushing tank, so that the direct contact area between the secondary steam pipe and white water is reduced, scaling is reduced, dust of a pulp board finished product is effectively and greatly reduced, and the product quality is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of papermaking and pulping equipment, and specifically relates to a heating device for a pulping tank. Background Technology

[0002] Currently, in the papermaking industry's pulping system, the pulp needs to be heated using steam in the slurry tank. The existing heating method uses a secondary steam pipe that extends from above into the slurry tank to directly spray steam. The outer wall of the steam pipe is in direct contact with the white water in the slurry tank. Because the white water contains calcium and magnesium ions, direct contact with the high-temperature outer wall of the secondary steam pipe will cause scaling. This scaling will continuously form dust during the flushing process of the white water. This dust will then mix with the pulp pump and enter the pulping system, affecting the quality of the pulp sheet formation. Utility Model Content

[0003] The purpose of this invention is to provide a heating device for a slurry filling tank, which solves the problem that the outer wall of the heating steam pipe is prone to scaling, and that the scale easily forms dust that mixes into the slurry filling system, ultimately affecting the quality of the slurry plate.

[0004] The technical solution adopted by this utility model is a heating device for a grouting tank, including a secondary steam pipe. The secondary steam pipe extends from one side of the grouting tank to the lower part of the grouting tank and penetrates the side wall of the grouting tank into the grouting tank. A steam ejector is provided at the end of the secondary steam pipe, and the nozzle of the steam ejector is facing upward.

[0005] Preferably, the end of the secondary steam pipe is connected to 3-5 steam injectors via a branch pipe.

[0006] Preferably, the lower part of the secondary steam pipe is provided with a support base, the support base is connected to the secondary steam pipe through a U-shaped seat, and a shock-absorbing cavity is provided between the support base and the U-shaped seat, the shock-absorbing cavity is filled with shock-absorbing steel balls.

[0007] Compared with the prior art, the beneficial effects of this utility model are: by setting a secondary steam pipe that extends into the slurry trough from the lower part of the outside, the direct contact area between the secondary steam pipe and the white water is reduced, scale formation is reduced, and dust in the finished slurry board is effectively reduced, thus improving product quality; on the other hand, the secondary steam pipe sprays steam upward from the lower part of the slurry trough, which effectively improves the heating efficiency of the slurry trough. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0009] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0010] like Figure 1As shown, a slurry flushing tank heating device includes a secondary steam pipe 1. The secondary steam pipe 1 extends from the outside of the slurry flushing tank 3 to the lower part of the slurry flushing tank 3, and penetrates the side wall of the slurry flushing tank 3 into the slurry flushing tank 3, located in the middle position. A steam ejector 2 is provided at the end of the secondary steam pipe 1, with the nozzle of the steam ejector 2 pointing upwards. The secondary steam pipe 1 extends from the lower part of the outside of the slurry flushing tank 3 into the slurry flushing tank 3, effectively reducing the direct contact area between the secondary steam pipe 1 and the white water, reducing scaling, significantly reducing dust in the finished slurry board, and improving product quality. In addition, the secondary steam pipe 1 sprays steam upwards from the lower part of the slurry flushing tank 3, effectively improving the heating efficiency of the slurry flushing tank 3.

[0011] Furthermore, the end of the secondary steam pipe 1 is connected to 3-5 steam injectors 2 via a branch pipe 4 to improve heating efficiency.

[0012] To further reduce the direct contact area between the secondary steam pipe 1 and the white water in the grouting tank 3, a protective sleeve 5 is installed on the portion of the secondary steam pipe 1 located inside the grouting tank 3. The diameter of the protective sleeve 5 is 1.2-1.5 times that of the secondary steam pipe 1, thus isolating and protecting the secondary steam pipe 1 from the white water. At the same time, filler can also be installed between the protective sleeve and the secondary steam pipe 1, which serves to provide heat insulation and dampen the vibration of the secondary steam pipe jet.

[0013] Because the secondary steam pipe 1 will generate a large vibration when it sprays steam, in order to ensure its stability, a support base 6 is provided at the lower part of the secondary steam pipe 1 located outside the slurry trough 3. The support base 6 is connected to the secondary steam pipe 1 through a U-shaped seat 7, that is, the secondary steam pipe 1 falls into the groove of the U-shaped seat 7 to ensure reliable connection. A shock-absorbing cavity 8 is provided between the support base 6 and the U-shaped seat. The shock-absorbing cavity 8 is filled with shock-absorbing steel balls 9, which have a shock-absorbing effect on the secondary steam pipe.

[0014] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A slurry tank heating device, comprising a secondary steam pipe (1), characterized in that, The secondary steam pipe (1) extends from one side of the grouting tank (3) to the lower part of the grouting tank (3) and penetrates the side wall of the grouting tank (3) into the grouting tank (3). A steam ejector (2) is provided at the end of the secondary steam pipe (1), and the nozzle of the steam ejector (2) is facing upward. The part of the secondary steam pipe (1) located in the grouting tank (3) is covered with a protective sleeve (5), and the diameter of the protective sleeve (5) is 1.2-1.5 times that of the secondary steam pipe (1). A packing is provided between the protective sleeve (5) and the secondary steam pipe (1).

2. The slurry flushing tank heating device according to claim 1, characterized in that, The end of the secondary steam pipe (1) is connected to 3-5 steam injectors (2) through a branch pipe (4).

3. The slurry flushing tank heating device according to claim 1, characterized in that, The secondary steam pipe (1) is provided with a support base (6) at the bottom. The support base (6) is connected to the secondary steam pipe (1) through a U-shaped seat (7). A damping cavity (8) is provided between the support base (6) and the U-shaped seat (7). The damping cavity (8) is filled with damping steel balls (9).

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