Bamboo pulp steam heater

Abstract

The utility model discloses a bamboo pulp steam heater, which relates to the technical field of pulping equipment and comprises a pipeline, a steam inlet main pipe is arranged right above the pipeline, and a first steam inlet branch pipe, a second steam inlet branch pipe, a third steam inlet branch pipe and a fourth steam inlet branch pipe are sequentially mounted on the pipeline along the steam conveying direction. The steam holes are formed in the steam branch pipes, bubbles generated by steam can be smaller, water hammer noise and equipment vibration are eliminated, heat exchange is facilitated, bamboo residues in bamboo pulp can be intercepted and prevented from blocking the steam holes by arranging the net covers outside the steam branch pipes, and the steam holes are prevented from being blocked by the bamboo residues. The four steam inlet branch pipes are connected with the steam inlet main pipe right above the pipeline, so that bamboo pulp can be prevented from flowing back into the steam pipeline to influence normal use of the steam generator and even damage the steam generator when air inlet is stopped or steam pressure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pulping equipment, in particular to a bamboo pulp steam heater. Background Technique

[0002] Papermaking pulping technology usually involves pre-treating waste paper, wood, cotton, hemp, bamboo, grass, etc. used as papermaking raw materials by cutting, pre-soaking, water washing, etc., and then placing them in a pressure vessel to be chemically treated into crude pulp at high temperature and high pressure, and then processed into papermaking pulp through processes such as screening.

[0003] In the oxygen delignification stage O, chlorine dioxide bleaching stage D, alkali extraction stage E, hydrogen peroxide bleaching stage P, and hypochlorite bleaching stage H in the pulp bleaching process, it is necessary to heat the pulp. During the pulp bleaching heating process using bamboo as the pulping raw material, due to the unique bamboo node structure of bamboo, bamboo nodes are more likely to form pulp residues during the pulping process, and due to the characteristics of longer fiber length and coarser fiber cells of bamboo pulp, it is easy to block the steam inlet pipe. For this reason, the patent authorization announcement number CN 202099660 U discloses a bamboo pulp steam heater to solve the above technical problems. However, in the existing technology during use, each steam inlet pipe only has one nozzle, and when steam is introduced into the bamboo pulp, large bubbles will be generated, which will cause water hammer noise and equipment vibration, having an adverse impact on the normal operation of production. Content of the Utility Model

[0004] The purpose of the utility model is to provide a bamboo pulp steam heater to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A bamboo pulp steam heater includes a pipeline. A main steam inlet pipe is arranged directly above the pipeline. Along the steam transmission direction on the pipeline, a first steam inlet branch pipe, a second steam inlet branch pipe, a third steam inlet branch pipe, and a fourth steam inlet branch pipe are successively installed. The first steam inlet branch pipe and the second steam inlet branch pipe are vertically inserted into the pipeline from top to bottom. The third steam inlet branch pipe and the fourth steam inlet branch pipe are respectively horizontally inserted into the pipeline from both sides of the pipeline. The tops of the first steam inlet branch pipe, the second steam inlet branch pipe, the third steam inlet branch pipe, and the fourth steam inlet branch pipe are connected to the main steam inlet pipe. A number of steam holes are opened on the first steam inlet branch pipe, the second steam inlet branch pipe, the third steam inlet branch pipe, and the fourth steam inlet branch pipe located inside the pipeline. A layer of mesh cover is arranged on the outer surface of the first steam inlet branch pipe, the second steam inlet branch pipe, the third steam inlet branch pipe, and the fourth steam inlet branch pipe located inside the pipeline.

[0007] As a further solution of the utility model: the first steam inlet branch pipe is inserted into the upper half of the pipe cavity, and the second steam inlet branch pipe is inserted into the lower half of the pipe cavity.

[0008] As a further solution of the utility model: the bottoms of the first steam inlet branch pipe, the second steam inlet branch pipe, the third steam inlet branch pipe and the fourth steam inlet branch pipe are closed ends.

[0009] As a further solution of the utility model: slurry inlets and slurry outlets are respectively arranged at both ends of the pipe, and flange plates are installed on both the slurry inlets and the slurry outlets.

[0010] As a further solution of the utility model: the steam holes are all arranged towards the slurry outlet direction.

[0011] As a further solution of the utility model: a gap is left between the wire mesh cover and each steam branch pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. By arranging a plurality of steam holes on the steam branch pipes, the utility model can make the bubbles generated by the steam smaller, thereby eliminating the water hammer noise and equipment vibration, and being beneficial to heat exchange.

[0014] 2. By arranging a wire mesh cover outside the steam branch pipes, the utility model can intercept the bamboo residues in the bamboo pulp to prevent them from blocking the steam holes.

[0015] 3. The four steam inlet branch pipes of the utility model are all connected to the steam inlet main pipe directly above the pipe. Such an arrangement can avoid the backflow of bamboo pulp into the steam pipeline when the steam intake stops or the steam pressure becomes smaller, which may affect the normal use of the steam generator or even damage the steam generator. Description of the Drawings

[0016] Figure 1 It is a front sectional view of a bamboo pulp steam heater.

[0017] Figure 2 It is a left view of a bamboo pulp steam heater.

[0018] Figure 3 It is a Figure 1 magnified view of the structure at A in a bamboo pulp steam heater.

[0019] 1. Pipe; 2. Slurry inlet; 3. Slurry outlet; 4. Steam inlet main pipe; 5. First steam inlet branch pipe; 6. Second steam inlet branch pipe; 7. Third steam inlet branch pipe; 8. Fourth steam inlet branch pipe; 9. Wire mesh cover; 10. Steam hole; 11. Flange plate. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 - 3 , in the embodiment of the present invention, a bamboo pulp steam heater includes a pipeline 1. A steam inlet main pipe 4 is arranged directly above the pipeline 1. Along the steam transmission direction on the pipeline 1, a first steam inlet branch pipe 5, a second steam inlet branch pipe 6, a third steam inlet branch pipe 7, and a fourth steam inlet branch pipe 8 are sequentially installed. The first steam inlet branch pipe 5 and the second steam inlet branch pipe 6 are vertically inserted into the pipeline 1 from top to bottom. The tops of the first steam inlet branch pipe 5, the second steam inlet branch pipe 6, the third steam inlet branch pipe 7, and the fourth steam inlet branch pipe 8 are connected to the steam inlet main pipe 4. A plurality of steam holes 10 are opened on the first steam inlet branch pipe 5, the second steam inlet branch pipe 6, the third steam inlet branch pipe 7, and the fourth steam inlet branch pipe 8 located inside the pipeline 1. The bottoms of the first steam inlet branch pipe 5, the second steam inlet branch pipe 6, the third steam inlet branch pipe 7, and the fourth steam inlet branch pipe 8 are closed ends.

[0022] Please refer to Figures 1 - 2 , the third steam inlet branch pipe 7 and the fourth steam inlet branch pipe 8 are respectively horizontally inserted into the pipeline 1 from both sides of the pipeline 1. The first steam inlet branch pipe 5 is inserted into the upper half of the inner cavity of the pipeline 1, and the second steam inlet branch pipe 6 is inserted into the lower half of the inner cavity of the pipeline 1. Such a design can make the steam holes 10 on each steam inlet branch pipe be distributed in different orientations inside the pipeline 1, making the steam mix more evenly with the bamboo pulp.

[0023] Please refer to Figures 1 - 3 , a wire mesh cover 9 is arranged on the outer surfaces of the first steam inlet branch pipe 5, the second steam inlet branch pipe 6, the third steam inlet branch pipe 7, and the fourth steam inlet branch pipe 8 located inside the pipeline 1. The wire mesh cover 9 can intercept the bamboo residues in the bamboo pulp to prevent them from blocking the steam holes 10.

[0024] Please refer to Figure 1 , slurry inlets 2 and slurry outlets 3 are respectively arranged at both ends of the pipeline 1. Flange plates 11 are installed on both the slurry inlets 2 and the slurry outlets 3. The arrangement of the flange plates 11 can facilitate the connection of the pipeline 1 with other devices.

[0025] Please refer to Figure 1 , the steam holes 10 are all arranged towards the direction of the slurry outlet 3. Such a design makes the openings of the steam inlet branch pipes not face the direction of the incoming slurry, so as to avoid being affected by the slurry flow pressure.

[0026] Please refer to Figure 3 , there is a gap between the wire mesh cover 9 and each steam branch pipe. This design is to prevent the pulp residue outside the wire mesh cover 9 from blocking the steam holes 10.

[0027] The working principle of the present utility model is as follows:

[0028] During use, when the slurry flows from the slurry inlet 2 to the slurry outlet 3, the steam flows from the main steam inlet pipe 4 to the first steam inlet branch pipe 5, the second steam inlet branch pipe 6, the third steam inlet branch pipe 7 and the fourth steam inlet branch pipe 8 respectively, and then the steam is dispersed and discharged from a number of steam holes 10 on the four inlet branch pipes and uniformly mixed with the bamboo pulp.

[0029] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A bamboo pulp steam heater, comprising a pipeline (1), characterized in that: A steam intake main pipe (4) is arranged directly above the pipeline (1); a first steam intake branch pipe (5), a second steam intake branch pipe (6), a third steam intake branch pipe (7) and a fourth steam intake branch pipe (8) are sequentially installed on the pipeline (1) along the steam transport direction; the first steam intake branch pipe (5) and the second steam intake branch pipe (6) are vertically plugged into the pipeline (1) from top to bottom; the third steam intake branch pipe (7) and the fourth steam intake branch pipe (8) are horizontally inserted into the pipeline (1) from both sides of the pipeline (1) respectively; the first steam intake branch pipe (5), the second steam intake branch pipe (6) and the fourth steam intake branch pipe (8) are respectively inserted into the pipeline (1) from both sides; The top ends of the second steam intake branch pipe (6), the third steam intake branch pipe (7) and the fourth steam intake branch pipe (8) are connected to the steam intake main pipe (4); a plurality of steam holes (10) are provided on the first steam intake branch pipe (5), the second steam intake branch pipe (6), the third steam intake branch pipe (7) and the fourth steam intake branch pipe (8) located in the pipeline (1); and a layer of mesh cover (9) is provided on the outer surfaces of the first steam intake branch pipe (5), the second steam intake branch pipe (6), the third steam intake branch pipe (7) and the fourth steam intake branch pipe (8) located in the pipeline (1).

2. The bamboo pulp steam heater according to claim 1, characterized in that: The first steam intake branch pipe (5) is inserted into the lumen of the upper half of the pipeline (1), and the second steam intake branch pipe (6) is inserted into the lumen of the lower half of the pipeline (1).

3. The bamboo pulp steam heater according to claim 1, characterized in that: The bottom ends of the first steam intake branch pipe (5), the second steam intake branch pipe (6), the third steam intake branch pipe (7) and the fourth steam intake branch pipe (8) are closed ends.

4. The bamboo pulp steam heater according to claim 1, characterized in that: A slurry inlet (2) and a slurry outlet (3) are respectively provided at both ends of the pipeline (1), and flanges (11) are installed on the slurry inlet (2) and the slurry outlet (3).

5. The bamboo pulp steam heater according to claim 1, characterized in that: The steam holes (10) are all arranged towards the slurry outlet (3).

6. The bamboo pulp steam heater according to claim 1, characterized in that: A gap is left between the mesh cover (9) and each steam branch pipe.

Images