JPS63249789A - Apparatus for biochemical pulping treatment of wood chip - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] ´ Industrial Application Field This invention relates to a biochemical pulping treatment device for wood chips, which is used to delignify and pulp wood chips using microorganisms such as white rot fungi. be.

Prior art and its problems In recent years, when white rot fungi are applied to wood chips, the lignin in the wood is selectively decomposed by these microorganisms.
It has been known that it becomes easier to be pulped.

Based on the above knowledge, the present inventors have considered mechanically treating wood chips with a refiner or the like and applying the above-mentioned microbial treatment as a pre-treatment step in the pulping method. As a result, for chips made of hardwoods such as white birch and poplar,
A mutant strain of C. hirstus was used as the microorganism, and the temperature was 30 to 35°C, the water content was about twice the total bone dry weight of the chip, the pH was 5 to 8, and the conditions were in an aerobic atmosphere. It has been revealed that processing this for about 10 days promotes the decomposition of lignin and can reduce the energy required for the subsequent mechanical pulp processing by more than 20%.

By the way, in the above-mentioned biochemical pulping treatment of wood chips, there has been no known technology that satisfies all of the above-mentioned microbial treatment conditions and can carry out the same treatment on a commercial scale.

Under these circumstances, an object of the present invention is to provide a microbial processing device for wood chips that can advantageously carry out the biochemical pulping treatment of wood chips on a commercial scale.

Means for Solving the Problems In the biochemical pulping treatment device for wood chips according to the present invention, a plurality of guide plates are arranged in a vertical cylindrical container consisting of a pair of first opposing walls and a pair of second opposing walls. The guide plates are provided in a staggered manner alternately on the first opposing walls of the pair, and each guide plate is inclined downwardly from one first opposing wall to the other first opposing wall, and is provided with respect to a pair of second opposing walls. form a right angle,
A communication port is provided between the lower end of each inclined guide plate and the first opposing wall, and the inoculated wood chips supplied to the top of the container flow down in a layered manner on each inclined guide plate and pass through each communication port. , which descends in a zigzag pattern inside the container.

The downward slope of the plurality of guide plates has an inclination angle of 40 to 50 degrees with respect to the horizontal, preferably about 45''.

The pulping processing device is composed of a plurality of containers arranged in the left-right direction and/or the front-back direction, and the adjacent containers are provided so that they share a first opposing wall and/or a second opposing wall. But that's fine. In this case, the pulp processing apparatus is configured such that the aggregate of the plurality of containers has a prismatic or cylindrical outer shape.

At least one guide plate may be provided with an air nozzle for forcing air into the layered chips.

At least a portion of the at least one guide plate may be comprised of a perforated plate that drains the culture solution from the layered chip.

At least one guide plate may be provided with a pie break to facilitate the flow of chips.

Effects of the Invention Since the pulping processing apparatus of the present invention is configured as described above, the space inside the container can be used effectively. In addition, when the flow of chips transfers from the upper guide plate to the lower guide plate, the chips are reversed and mixed well.
Processing can be performed uniformly throughout.

Example Next, embodiments of the invention will be described.

Example 1 (See FIG. 1) FIG. 1 shows the basic configuration of a pulping processing apparatus according to the present invention.

The pulping processing device has a pair of left and right first opposing walls (la).
A vertical cylindrical container (1) with a rectangular cross section consisting of a pair of front and rear second facing walls (1a) and a pair of front and rear second opposing walls (1b) each having a wider width than the second walls (1a), and a vertical cylindrical container (1) with a rectangular cross section, which is arranged in a multi-tiered manner inside the container (1). It mainly consists of a plurality of guide plates (2).

The plurality of guide plates (2) are connected to a pair of first opposing walls (la).
In (la), they are arranged alternately on the left and right in a staggered manner.

Each guide plate (2) has a pair of left and right first opposing walls (L
a) A pair of second opposing walls (1b) (l
b) is arranged at right angles to b). Also, between the lower end of each inclined guide plate (2) and the first opposing wall (la), there is a communication port (3) through which the chips (C) flow from the upper stage to the lower stage.
) is provided.

An inlet (4) for supplying inoculated wood chips is provided on the left side of the top wall (IC) provided at the top of the container (1),
The uppermost guide plate (2) is arranged on the left facing wall (1a) so as to communicate therewith.

The second guide plate from the top (2) is the topmost communication port (3)
It is provided on the opposite wall (1a) on the right side slightly below. Hereinafter, similar configurations are sequentially taken downward. Further, an outlet (5) for discharging chips is provided at the bottom of the container (1), and a lowermost guide plate (2) is disposed above the outlet so as to communicate with this outlet. A feeding device (6) for discharging processed chips is disposed below the outlet (5) so as to communicate therewith. The feeding device (6) transfers the processed chips to the container (1).
A fixed amount is discharged from the bottom of the system out of the system, and screw or rotary types are often used. However, these are not limited.

Inoculated wood chips (
C) flows down in a layered manner on each inclined guide plate (2), passes through each communication port (3), and descends in a zigzag pattern inside the container (1).

The inclination angle of the downward slope of the plurality of guide plates (2) is approximately equal to the angle of repose of the chip (C), that is, about 45'' with respect to the horizontal. By setting the inclination angle in this way, The layer thickness of the layered chips (C) on the guide plate (2) is maintained almost constant, and the layered chips (C) maintain a uniform flow rate at any position in the flow direction on the guide plate (2). This is convenient for biochemical processing in an aerobic atmosphere.

In addition, in the container (1) of this example, a pair of opposite walls (front and rear) (
tb) (tb) are parallel, so the layered tip (C) on the guide plate (2) can maintain a constant coverage area at any position in the flow direction, and the layered tip (C) is not inhibited from descending.

Example 2 (see Figure 2) When the height of the container is specified, if the length of the guide plate is long, the space that is not filled with chips will increase, and the number of guide plates will decrease, causing reversal. Due to the reduced number of times, the pulping process becomes non-uniform. On the other hand, if the length of the guide plate is shortened, it is advantageous in terms of effective use of the space inside the container and uniform processing, but the volume of the container becomes smaller, making it unsuitable for processing a large amount of chips.

Therefore, in this embodiment, as shown in FIG. 2, six containers (11) having the configuration of the first embodiment are arranged side by side in two rows on the left and right and three rows in the front and back, and each container (11) is Similarly to Example 1, an inclined guide plate (12) was arranged to construct a pulping treatment apparatus. Containers adjacent to the left and right (11)
The containers (11) adjacent to each other in the front and back share the second opposing wall (llb) between them.

With the above configuration, it is possible to save the material used to construct the container, and it is possible to uniformly process a large amount of chips by effectively utilizing the space inside the container.

In addition, if the width of the guide plate is wide, it becomes difficult to attach the guide plate to the second opposing wall at the same height with high precision in the width direction. If the two opposing walls are biased toward one side, the layer thickness cannot be kept uniform in the width direction, and in addition, the amount of chips supplied into the container and the amount to be discharged from the container cannot be made uniform in the width direction. It disappears.

On the other hand, in this embodiment, since a plurality of containers (11) are arranged in the front-back direction, the width of the guide plate (12) can be narrowed to solve the above problem.

Embodiment 3 (See FIG. 3) Similar to Embodiment 2, this embodiment is intended to reduce the amount of material used to construct the container and to uniformly process a large amount of chips.

In FIG. 3, a plurality of cylindrical walls (31
) and a plurality of partition walls (32) provided at predetermined intervals across these cylindrical walls (31), a plurality of containers (2
1) is constructed. Each container of this aggregate (
21), a pair of left and right partition walls (32) correspond to a first opposing wall (21a), and a pair of inner and outer cylindrical walls (31) correspond to a pair of second opposing walls (21b). The containers (21) adjacent to each other on the left and right are separated by a first opposing wall (21a) between them.
The containers (21) that are adjacent to each other in the front and rear coexist with the second opposing wall (21b) between them. In each container (21), inclined guide plates (22) are provided alternately on a pair of first opposing walls in a staggered manner to constitute a pulping processing apparatus.

Embodiment 4 (See FIG. 4) In this embodiment, an air nozzle is provided as a guide in the pulping processing apparatus shown in FIGS. 1-3.

In FIG. 4, a header (44) having a plurality of air nozzles (43) is arranged on the lower surface of the guide plate (42),
An air nozzle (43) passes upward through the guide plate (42), and a blower (41) is connected to the header (44).

With this configuration, air is forcibly blown from the blower (41) through the header (44) and the air nozzle (43) to the layered chip (C) on the guide plate (42).

As a result, the interior of the chip layer can be maintained in an aerobic atmosphere and biochemical treatment can be performed uniformly throughout.

Furthermore, in this embodiment, air is sent to the blower (41) from the space below the guide plate (42). As a result, the air coming out from the surface of the lower chip layer is removed by a blower (
41), and this can be blown into the upper chip layer. By circulating the air inside the container in this way, the temperature and humidity inside the container can be kept constant.

Example 5 (See FIG. 5) In this example, the guide plate of the pulping processing apparatus shown in FIGS. 1 to 3 is composed of a perforated plate.

In Fig. 5, the lower half of the guide plate (52) inside the container is composed of a perforated plate, and a liquid collection chamber (51) is provided on the lower surface of this perforated portion (54), and a liquid collection chamber (51) is provided from the same chamber (51). A drain pipe (53) is provided outside the container.

A large amount of culture solution containing bacteria is supplied to the container together with the chip (C) so that the surface of the chip (C) is evenly inoculated with bacteria at the top of the container. In this case, the culture solution after inoculation is discharged from the layered chip (C) to the outside of the container through the porous portion (54) of the guide plate (52) and the drain pipe (53).

Example 6 (See FIG. 6) In this example, a pie break is provided on the guide plate of the pulping processing apparatus shown in FIGS. 1 to 3.

In FIG. 6, an electric pie break (61) is attached to the lower surface of the guide plate (82).

If the particle size of the chips is uniform throughout and the inclination angle of the guide plate is about 45°, the layered chips (C) will naturally flow down due to gravity, but if the particle size of the chips is uneven, the chips will not flow smoothly. Continuous flow may be prevented. In this case, the guide plate (82) is activated by the pie break (61).
) can be forcibly vibrated to promote the flow of the chip (C).

Further, if vibrators are provided on all stages of the guide plates, the inclination angle of the guide plates can be made smaller than 45'', and the space above the guide plates in the container can be used more effectively.

[Brief explanation of drawings]

All drawings show embodiments of the invention. FIG. 1(A) is a vertical sectional view of the pulping processing apparatus of Example 1, and FIG. 1(B) is a sectional view taken along the line X--X in FIG. 1(A). FIG. 2(A) is a vertical sectional view of the pulping processing apparatus of Example 2, and FIG. 2(B) is a sectional view taken along the Y-Y line in FIG. 2(A). FIG. 3(A) is a partially cutaway front view of the pulp processing apparatus of Example 3, and FIG. 3(B) is a sectional view taken along the Z-Z line in FIG. 3(A). Fig. 4 is Fig. 1 (A
) is a corresponding partially enlarged sectional view. Fig. 5 is Fig. 1 (A
) is a corresponding partially enlarged sectional view. Fig. 6 is Fig. 1 (A
) is a corresponding partially enlarged sectional view. (1) (ll) (21) - Container, (la) (Lla
) (21a)...first opposing wall, (lb) (llb)
(21b)...Second opposing wall, (2) (12) (2
2) (42) (52) (62)...Guide plate,
(3)...Communication port, (4)...Entrance, (5)...
Outlet, (6)... Feeding device, (41)... Blower,
(43)... Air nozzle, (53)... Drain pipe, (
54)... Porous part, (61)... Pie break, (
C)...chip. Above Figure 3

Claims (8)

[Claims] (1) In a vertical cylindrical container consisting of a pair of first opposing walls and a pair of second opposing walls, a plurality of guide plates are provided alternately on the pair of first opposing walls in a staggered manner, and each The guide plates are inclined downward from one first opposing wall to the other first opposing wall and are perpendicular to the pair of second opposing walls, and the lower end of each inclined guide plate and the first opposing wall are A communication port is provided in between, and the inoculated wood chips supplied to the top of the container flow down in a layer on each inclined guide plate, pass through each communication port, and descend in a zigzag pattern inside the container. Biochemical pulp processing equipment for wood chips. (2) The device according to claim 1, wherein the downward slope of the plurality of guide plates has an inclination angle of 40 to 50 degrees, preferably about 45 degrees with respect to the horizontal. (3) The pulping processing device is composed of a plurality of containers arranged in the left-right direction and/or the front-back direction, and adjacent containers are provided so as to share a first opposing wall and/or a second opposing wall. , the apparatus according to claim 1. (4) The device according to claim 3, wherein the assembly of the plurality of containers has a prismatic outer shape. (5) The device according to claim 3, wherein the aggregate of the plurality of containers has a cylindrical outer shape. (6) The device according to claim 1, wherein at least one guide plate is provided with an air nozzle for forcibly blowing air into the layered chips. (7) At least a portion of at least one guide plate,
2. The device according to claim 1, comprising a perforated plate for discharging the culture medium from the layered chip. (8) The device according to claim 1, wherein a vibrator is attached to at least one guide plate.