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CN-117888382-B - Paper pulp grinding equipment and process thereof

CN117888382BCN 117888382 BCN117888382 BCN 117888382BCN-117888382-B

Abstract

The invention provides paper pulp pulping equipment and a process thereof, which relate to the technical field of papermaking, comprises a carrier plate, a fixed shell, an upper millstone, a driving component, a middle millstone, a millstone cover, a lower millstone and a discharging pipe. The invention adopts the rotating middle grinding disc and the upper grinding disc to form a first processing area and the rotating lower grinding disc to form a second processing area, thereby keeping the thickness of the fiber and the length of the fiber moderate, improving the scouring rate, shearing and kneading the fiber with the edge of the second notch in the rotating process of the slitting scraper at the bottom of the upper grinding disc, enabling the slurry flowing into the second notch to flow obliquely upwards under the action of centrifugal force, repeatedly shearing and kneading the fiber at the shallower position of the second notch, improving the pulping efficiency, enabling the slurry to flow outwards under the action of the centrifugal force, ensuring smooth slurry circulation in the whole process, and accelerating the pulping efficiency by driving the slurry to flow by the centrifugal force.

Inventors

  • LI WENJUN
  • WU HESHI
  • XIAO JIANHUA

Assignees

  • 广东理文卫生用纸有限公司

Dates

Publication Date
20260505
Application Date
20231225

Claims (9)

  1. 1. Paper pulp pulping equipment, including carrier plate (1), the bottom fixed mounting of carrier plate (1) has chassis (2), its characterized in that still includes: The fixed shell (5), the fixed shell (5) is fixedly arranged at the top of the carrier plate (1), and the inner side of the fixed shell (5) forms a step part with big upper part and small lower part; the upper grinding disc (7), the step portion at fixed shell (5) is fixed to upper grinding disc (7), upper grinding disc (7) include first disk body (71), bar hole (72) along radial setting of first disk body (71) have been seted up at the top of first disk body (71), the bottom fixedly connected with of first disk body (71) cuts scraper (73), cut scraper (73) are rectangular shape, and along the radial setting of first disk body (71), and cut scraper (73) have a plurality ofly, are annular array and distribute; the driving assembly (3), the said driving assembly (3) is fixedly mounted on chassis (2), and the spindle (8) of the driving assembly (3) stretches into the inside of the fixed outer cover (5); The middle grinding disc (10), the middle grinding disc (10) is located in the fixed shell (5) and below the upper grinding disc (7), the middle grinding disc (10) is fixedly connected with the rotating shaft (8), a first notch (101) and a second notch (102) are formed in the top of the middle grinding disc (10), the first notch (101) and the second notch (102) are both in strip shapes and are arranged along the radial direction of the middle grinding disc (10), the depth of the first notch (101) and the second notch (102) gradually increases from the outer end towards the center of the middle grinding disc (10), an overflow port (103) leading to the bottom of the middle grinding disc (10) is formed in the deepest part of the first notch (101), one unit hole group is formed by one first notch (101) and one second notch (102), the number of the unit hole groups is multiple, the first notch (101) and the second notch (102) are distributed in an annular array, the outer ends of all the first notch (101) and the second notch (102) are communicated with the bottom end of the annular groove (104) of the annular groove (10); The disc cover (13), the disc cover (13) comprises an annular piece (132), a blocking plate (131) is fixedly connected to the inner side of the annular piece (132), the annular piece (132) corresponds to the annular groove (104), and the number and the positions of the blocking plate (131) correspond to the first notch (101); The lower grinding disc (11), the lower grinding disc (11) is fixedly connected with the bottom end of the fixed shell (5), the top of the lower grinding disc (11) is provided with a conical surface, the top of the lower grinding disc (11) corresponds to the bottom end of the middle grinding disc (10), and an annular cavity (12) is formed between the middle grinding disc (10) and the lower grinding disc (11) on the inner side of the fixed shell (5); The discharging pipe (4), the one end and the fixed shell (5) fixed connection of discharging pipe (4), and discharging pipe (4) and annular cavity (12) intercommunication.
  2. 2. The paper pulp pulping equipment according to claim 1, wherein the top end of the rotating shaft (8) penetrates through the upper grinding disc (7), the rotating shaft (8) is rotationally connected with the upper grinding disc (7), the top end of the rotating shaft (8) is fixedly connected with a rotary grate (9), and the top of the fixed shell (5) is fixedly connected with a feed hopper (6).
  3. 3. The paper pulp pulping equipment according to claim 2, wherein the rotary grate (9) comprises a mounting ring (91) and a strip-shaped piece (92), the mounting ring (91) is sleeved on the rotating shaft (8) and is fixedly connected with the rotating shaft through a key, and one end of the strip-shaped piece (92) is fixedly connected with the outer side face of the mounting ring (91).
  4. 4. The paper pulp pulping equipment according to claim 2, wherein the feed hopper (6) comprises an annular shallow part (61), an annular deep part (62) is arranged on the inner side of the annular shallow part (61), a center cap (64) is fixedly connected to the center position of the annular deep part (62), and a falling hole (63) is formed in the inner bottom of the annular deep part (62).
  5. 5. The paper pulp pulping equipment according to claim 1, wherein the discharging pipe (4) comprises a drainage pipe (41) and a conveying pipe (42), the conveying pipe (42) is fixedly connected with the carrier plate (1), one end of the drainage pipe (41) is fixedly connected with the fixed shell (5), and the other end of the drainage pipe (41) is fixedly connected with the side face of the conveying pipe (42).
  6. 6. A paper pulp refining apparatus as claimed in claim 1, characterized in that the lower grinding disc (11) has a central hole, the rotating shaft (8) is located inside the central hole of the lower grinding disc (11), and the rotating shaft (8) is rotatably connected with the central hole of the lower grinding disc (11) through a sealing bearing.
  7. 7. A paper pulp refining apparatus as claimed in claim 1, wherein the bottom end conical surface of the middle grinding disc (10) is provided with a spiral protruding part, and the top conical surface of the lower grinding disc (11) is provided with a plurality of concentric annular protruding parts.
  8. 8. A paper pulp refining process, which is characterized by comprising the following steps of; S1, grinding short fibers and long fibers by using the paper pulp grinding equipment according to any one of claims 1-7 when pulp is crushed; and S2, controlling the rotating speed of the rotating shaft of the driving assembly to be 100-500rpm in the pulping process.
  9. 9. A paper pulp refining process as claimed in claim 8, wherein the ratio of short fibers to long fibers is 1:3.5-5.2.

Description

Paper pulp grinding equipment and process thereof Technical Field The invention relates to the technical field of papermaking, in particular to paper pulp pulping equipment and a process thereof. Background In recent years, with the rapid development of the economy in China, the living standard of people is improved, the consumption of the paper for daily use is in a stable growth state, and the productivity of the paper for daily use is gradually improved. The daily consumption of domestic paper in China has a considerable development space, and the daily paper has a huge growth space. In recent years, the domestic paper market is one of the most active paper product markets worldwide, the continuous expansion of the domestic paper productivity stimulates the domestic economic growth, and the competitive pressure of the domestic paper market is further increased while the living standard of people is promoted, so that the optimization of paper pulp pulping equipment and the process thereof is one of the important research subjects in the next few years. The pulp is divided into a long fiber pulp crushing line and a short fiber pulp crushing line from a pulper, and the subsequent pulp grinding is also carried out separately until pulp is mixed, long fibers and short fibers are uniformly mixed and then are subjected to sizing, and more than two groups of pulp grinding equipment are required to be arranged in the process flow, so that the investment of papermaking cost is large; the present pulping equipment is not suitable for pulping after adding part of short fibers into a long fiber crushing pot and crushing the short fibers together, so the invention provides paper pulp pulping equipment and a process thereof, which are used for reducing equipment cost investment in pulping process. Disclosure of Invention Technical problem to be solved Aiming at the defects of the prior art, the invention provides paper pulp pulping equipment and a process thereof, which solve the problem that the prior pulping equipment is not suitable for pulping after adding part of short fibers into a long fiber crushing pot and crushing the short fibers together. Technical proposal In order to achieve the above purpose, the invention is realized by the following technical scheme: a paper pulp refining apparatus comprising: the bottom of the carrier plate is fixedly provided with a bottom frame; The fixed shell is fixedly arranged at the top of the carrier plate, and a step part with a large upper part and a small lower part is formed at the inner side of the fixed shell; The upper grinding disc is fixedly arranged at the step part of the fixed shell and comprises a first disc body, strip-shaped holes are formed in the top of the first disc body and are radially arranged along the first disc body, a slitting scraper is fixedly connected to the bottom of the first disc body, the slitting scraper is strip-shaped and is radially arranged along the first disc body, and the slitting scraper is distributed in an annular array; the driving assembly is fixedly arranged on the underframe, and a rotating shaft of the driving assembly extends into the fixed shell; The middle grinding disc is positioned in the fixed shell and below the upper grinding disc, the middle grinding disc is fixedly connected with the rotating shaft, a first notch and a second notch are formed in the top of the middle grinding disc, the first notch and the second notch are both in a strip shape and are arranged along the radial direction of the middle grinding disc, the depth of the first notch and the second notch from the outer end to the center of the middle grinding disc is gradually increased, an overflow port leading to the bottom of the middle grinding disc is formed in the deepest part of the first notch, one first notch and one second notch are used as one unit hole group, the number of the unit hole groups is multiple, the unit hole groups are distributed in an annular array, annular grooves are formed in the top of the middle grinding disc, the outer ends of all the first notch and the second notch are communicated with the annular grooves, and the bottom of the middle grinding disc is a conical surface; the disc cover comprises an annular piece, the inner side of the annular piece is fixedly connected with a blocking plate, the annular piece corresponds to the annular groove, and the number and the positions of the blocking plates correspond to the first notch; the lower grinding disc is fixedly connected with the bottom end of the fixed shell, the top of the lower grinding disc is provided with a conical surface, the top of the lower grinding disc corresponds to the bottom end of the middle grinding disc, and an annular cavity is formed between the middle grinding disc and the lower grinding disc on the inner side of the fixed shell; The discharging pipe, the one end and the fixed shell fixed connection of discharging pipe, and discharging pipe and annular