阅读说明：本技术 一种植物纤维纸浆的无污染生产工艺及其生产设备 (Pollution-free production process and production equipment of plant fiber paper pulp ) 是由 吴袖福 于 2020-06-09 设计创作，主要内容包括：本发明公开了一种植物纤维纸浆的无污染生产工艺及其生产设备,生产工艺包括以下步骤。本发明根据植物纤维纸浆的无污染生产工艺分别设置一体结构的预处理机构与深处理机构；在预处理机构中利用旋转的粉碎刀对原木进行深度剪切；再利用主粉碎碾与辅粉碎碾对酸浸的原木渣料与浆液实现分离区分；在深处理机构中利用蒸煮箱对位于制浆箱内的桨叶进行预热；通过在冷却状态下增添浆内添加剂与烘缸涂赋剂,以提升浆液的柔软性与平滑性,同时提升纸浆的光亮洁净程度；通过添加与浆液高度混合的蛋白酶水溶液,以便于高温蒸煮作用下对植物纤维浆液中的木素、树脂、色素、果胶与灰分等进行分离清理,从而获取高度精分出来的精浆。(The invention discloses a pollution-free production process of plant fiber paper pulp and production equipment thereof. The invention respectively arranges a pretreatment mechanism and a deep treatment mechanism which are integrated into a whole according to the pollution-free production process of the plant fiber paper pulp; deep shearing is carried out on the log by utilizing a rotary crushing knife in a pretreatment mechanism; separating and distinguishing the acid-leached log slag material and the slurry by using a main crushing roller and an auxiliary crushing roller; preheating the blades in the pulping box by using a cooking box in the deep processing mechanism; adding the additive in the pulp and coating the excipient on the drying cylinder in a cooling state to improve the softness and smoothness of the pulp and improve the brightness and cleanness degree of the pulp; by adding the protease aqueous solution highly mixed with the pulp, lignin, resin, pigment, pectin, ash and the like in the plant fiber pulp are conveniently separated and cleaned under the high-temperature cooking action, so that the highly refined pulp is obtained.)

1. A pollution-free production process of plant fiber paper pulp is characterized by comprising the following steps:

step S1, conveying peeled, knotted and cleaned logs into equipment to be crushed, and sprinkling 1-3 parts of purified water to the logs in the equipment every 5-10 min;

step S2, squeezing the crushed log for 1-1.5h, and sprinkling alkaline solution with 1.5-2 weight parts to the log in the equipment every 25-30 min;

step S3, screening the squeezed log solid residue and the pulp, removing macroscopic solid impurities in the pulp, and adding 2-4 parts of distilled water into the pulp for dilution;

step S4, sending the diluted slurry to production equipment, adding 2-3 parts of sodium hydroxide solution with the concentration of 2% -3.5%, mixing, and continuously boiling for 2-4h at the constant temperature of 80-95 ℃;

step S5, standing and cooling for 0.5-1.5h to normal temperature, fishing out floating objects on the liquid level of the cleaned serous fluid, adding a brightening stripping agent with 3-5 weight parts and concentration of 10-20% into the serous fluid, and mixing;

step S6, adding a mixed solution of sodium hydroxide and sodium sulfide with a component concentration of 12% -18% to the slurry, continuously cooking at a constant temperature of 125 ℃ for 3-4.5h at 100-;

and step S7, continuously cooking for 2-4h at the constant temperature of 90-120 ℃, fishing the floating materials in the serous fluid for 5-7 times every 30-40min, standing and cooling to the normal temperature to obtain the seminal fluid.

2. The process of claim 1, wherein the alkali solution in step S2 is 2% -4% hydrogen peroxide solution at room temperature.

3. The process for pollution-free production of plant fiber pulp as claimed in claim 1, wherein the floaters in step S5 include resin, pectin and ash, and the gloss enhancing stripper is prepared from pulp additives and drying cylinder coating excipients.

4. The process for pollution-free production of plant fiber pulp according to claim 1, wherein the mass ratio of the protease aqueous solution in the step S6 is 3% to 12%.

5. The process for producing plant fiber pulp according to claim 1, wherein the floaters in the step S7 include lignin and pigment.

6. A production apparatus to be used in a process for the non-polluting production of plant fiber pulp according to any of claims 1 to 5, characterized by comprising a pretreating mechanism (1) and a deep treating mechanism (2);

the pretreatment mechanism (1) comprises a lower barrel (3) and an upper barrel (4), wherein the lower barrel (3) is communicated with the upper barrel (4) which is provided with a discharge hole (15), the upper barrel (4) is fixedly provided with a first-stage motor (6), a crushing cutter (7) connected with the output end of the first-stage motor (6) is rotatably arranged in the upper barrel (4), two sides of the lower barrel (3) are respectively and fixedly provided with a second-stage motor (8) and a third-stage motor (9), the output ends of the second-stage motor (8) and the third-stage motor (9) are respectively connected with a main crushing roller (10) and an auxiliary crushing roller (11) which are meshed and connected, guide rods (12) are welded in two sides of the lower barrel (3), and springs (13) and screens (14) are respectively sleeved on the guide rods (12);

the deep processing mechanism (2) comprises a cooking box (16) and a cover body (17) which are connected, a four-stage motor (18) is fixedly arranged at the lower end of one side of the cooking box (16), a ball screw (19) connected with the output end of the four-stage motor (18) is arranged in the lower end of the cooking box (16) in a rotating mode, a nut (20) is connected onto the ball screw (19), a pulping box (21) is connected onto the nut (20) through a bolt, a rotating shaft (24) and a stirring shaft (25) are arranged in the two sides of the cooking box (16) in a rotating mode, a first-stage gear (26) and a second-stage gear (27) which are meshed with each other are respectively sleeved on the ball screw (19) and the rotating shaft (24), a third-stage gear (28) and a fourth-stage gear (29) which are meshed with each other are respectively sleeved on the rotating shaft (24) and the stirring, and both ends of the cover body (17) are provided with piston pipes (31) connected with a hydraulic controller (30), the piston pipes (31) are sleeved with pistons (32) in a sliding manner, and the free ends of the pistons (32) are connected with purification filter plates (33) through pin shafts.

7. The plant fiber pulp non-pollution production apparatus according to claim 6, wherein said steps S1-S3 are performed in a pretreatment mechanism (1), and said steps S4-S7 are performed in a deep treatment mechanism (2).

8. A plant fiber pulp pollution-free production apparatus according to claim 6, wherein said main crushing roller (10) and said auxiliary crushing roller (11) are horizontally disposed in said lower cylinder (3), said spring (13) is fixedly sleeved on the lower end of said guide rod (12), and said screen (14) having both ends slidably sleeved on the upper end of said guide rod (12) is disposed right below said main crushing roller (10) and said auxiliary crushing roller (11).

9. The plant fiber pulp pollution-free production equipment according to claim 6, wherein limiting sleeves (23) are horizontally welded in two sides of the cooking box (16), and limiting bolts (22) which are slidably sleeved in the limiting sleeves (23) are horizontally welded outside two sides of the pulping box (21).

10. The plant fiber pulp non-pollution production apparatus according to claim 9, wherein said rotating shafts (24) are vertically disposed in both sides of the cooking tank (16), and the stirring shafts (25) are vertically disposed in both sides of the pulping tank (21).

Technical Field

The invention relates to the technical field of fiber paper pulp, in particular to a pollution-free production process and production equipment of plant fiber paper pulp.

Background

As a country of origin of papermaking, China is always in the inexhaustible exploration of cumin for the papermaking technology, and in any age due to the requirement of cultural development, the paper making serving as a culture carrier can become an inexhaustible industry and a supporting industry of national economy of China, but the paper making industry has to be acknowledged as the variety and the quantity of materials required for papermaking are very wide, especially, the paper pulp source necessary for papermaking is various plants, so that the paper making industry is an important aspect of causing environmental pollution.

Because the traditional technology mostly adopts a direct crushing and squeezing mode for plants, but the plant fibers have tough structures, and the single crushing structure is utilized to completely obtain the pulp from the logs, the utilization rate of the plant logs is extremely limited, but more plant log resources are needed for obtaining enough pulp; although the alkali recovery by the combustion method is an effective method for solving the problem of cooking black liquor at present, the one-time investment is huge, and the operating cost is high; moreover, the traditional alkali recovery technology not only burns the available organic matters in the black liquor, but also generates a large amount of harmful gas to cause secondary pollution; in addition, a large amount of substances including cellulose and hemicellulose are mixed in the pulp obtained from the raw wood fibers, and simultaneously, the pulp also comprises lignin, resin, pigment, pectin and ash, wherein the former is an essential component for preparing the paper pulp, and the latter is unnecessary and needs to be removed.

Disclosure of Invention

The invention aims to solve the problem that high-quality pulp is difficult to prepare by using plant fibers in the prior art, and provides a pollution-free production process and production equipment for plant fiber pulp.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pollution-free production process of plant fiber paper pulp comprises the following steps:

step S1, conveying peeled, knotted and cleaned logs into equipment to be crushed, and sprinkling 1-3 parts of purified water to the logs in the equipment every 5-10 min;

step S2, squeezing the crushed log for 1-1.5h, and sprinkling alkaline solution with 1.5-2 weight parts to the log in the equipment every 25-30 min;

step S3, screening the squeezed log solid residue and the pulp, removing macroscopic solid impurities in the pulp, and adding 2-4 parts of distilled water into the pulp for dilution;

step S4, sending the diluted slurry to production equipment, adding 2-3 parts of sodium hydroxide solution with the concentration of 2% -3.5%, mixing, and continuously boiling for 2-4h at the constant temperature of 80-95 ℃;

step S5, standing and cooling for 0.5-1.5h to normal temperature, fishing out floating objects on the liquid level of the cleaned serous fluid, adding a brightening stripping agent with 3-5 weight parts and concentration of 10-20% into the serous fluid, and mixing;

step S6, adding a mixed solution of sodium hydroxide and sodium sulfide with a component concentration of 12% -18% to the slurry, continuously cooking at a constant temperature of 125 ℃ for 3-4.5h at 100-;

and step S7, continuously cooking for 2-4h at the constant temperature of 90-120 ℃, fishing the floating materials in the serous fluid for 5-7 times every 30-40min, standing and cooling to the normal temperature to obtain the seminal fluid.

Preferably, the alkali solution in the step S2 is a normal-temperature hydrogen peroxide solution with a concentration of 2% -4%.

Preferably, the floaters in the step S5 comprise resin, pectin and ash, and the brightening stripping agent adopts an in-pulp additive and a drying cylinder coating excipient.

Preferably, the mass ratio of the protease aqueous solution in the step S6 is 3% -12%.

Preferably, the floating materials in the step S7 include lignin and pigment.

A production device applied to a pollution-free production co-process of plant fiber paper pulp comprises a pretreatment mechanism and a deep treatment mechanism;

the pretreatment mechanism comprises a lower barrel body and an upper barrel body, wherein the lower barrel body is communicated with the upper barrel body, the lower barrel body is provided with a discharge port, the upper barrel body is provided with a feed port, a primary motor is fixedly mounted on the upper barrel body, a crushing cutter connected with the output end of the primary motor is rotatably mounted in the upper barrel body, a secondary motor and a tertiary motor are respectively fixedly mounted on two sides of the lower barrel body, the output ends of the secondary motor and the tertiary motor are respectively connected with a main crushing roller and an auxiliary crushing roller which are connected in a meshed mode, guide rods are welded in two sides of the lower barrel body, and springs and screens are respectively sleeved;

deep reason mechanism is including the boiling case and the lid that are connected, and boiling case one side lower extreme fixed mounting has the level four motor, boiling case lower extreme internal rotation is provided with the ball that is connected with the level four motor output, and is connected with the nut on the ball, bolted connection has the case of making milk on the nut, it is provided with pivot and (mixing) shaft all to rotate in the case both sides to boil, and overlaps respectively in ball and the pivot and be equipped with engaged with one-level gear and second grade gear, overlap respectively on pivot and the (mixing) shaft and be equipped with engaged with tertiary gear and level four gear, the fixed hydraulic controller that is provided with in lid upper end, and the lid both ends all are provided with the piston pipe that is connected with hydraulic controller, the slip cover is equipped with the piston in the piston pipe, and round pin hub connection has the purification filter.

Preferably, the steps S1-S3 are performed in a preprocessing mechanism, and the steps S4-S7 are performed in a deep processing mechanism.

Preferably, main crushing roller is located the barrel down with assisting crushing roller level correspondence, the guide bar lower extreme is located to the fixed cover of spring, and both ends slip cap locates the screen cloth of guide bar upper end and is located main crushing roller and assist and smashes under the roller.

Preferably, the inner parts of two sides of the cooking box are horizontally welded with limit sleeves, and the outer parts of two sides of the pulping box are horizontally welded with limit bolts which are sleeved in the limit sleeves in a sliding manner.

Preferably, the rotating shafts are vertically arranged in the two sides of the cooking box, and the stirring shafts are vertically arranged in the two sides of the pulping box.

Compared with the prior art, the invention has the following advantages:

1. the invention sets a crushing knife which is driven by a primary motor to rotate in a pretreatment mechanism to crush clean and flexible logs, and performs acid leaching treatment on the logs by sprinkling alkaline solution so as to neutralize the acid-base property of the logs; deep squeezing is carried out on the log by utilizing a main crushing roller and an auxiliary crushing roller which correspond horizontally, so that separation of the pulp from the log is realized; and the screen mesh which can move up and down is used for filtering and screening the raw wood slag material and the slurry.

2. The deep processing mechanism is provided with an integrated structure, a boiling box is utilized in the deep processing mechanism to preheat blades in a pulping box, and sodium hydroxide solution is added to adjust the pH value of the diluted pulp; the softness and smoothness of the pulp are improved and the brightness and cleanness degree of the pulp are improved by adding the additives in the pulp and coating the excipients on the drying cylinder in a cooling state.

3. According to the invention, the deep treatment mechanism is used for continuously heating and cooling the pulp for many times, and the protease aqueous solution highly mixed with the pulp is added, so that lignin, resin, pigment, pectin, ash and the like in the plant fiber pulp are separated and cleaned under the high-temperature cooking action, and the high-precision refined pulp is obtained.

In conclusion, the pretreatment mechanism and the deep treatment mechanism which are integrated are respectively arranged according to the pollution-free production process of the plant fiber paper pulp; deep shearing is carried out on the log by utilizing a rotary crushing knife in a pretreatment mechanism; separating and distinguishing the acid-leached log slag material and the slurry by using a main crushing roller and an auxiliary crushing roller so as to realize primary impurity removal of the slurry; preheating the blades in the pulping box by using a cooking box in a deep processing mechanism, and adding a sodium hydroxide solution to adjust the pH value of the diluted pulp; adding the additive in the pulp and coating the excipient on the drying cylinder in a cooling state to improve the softness and smoothness of the pulp and improve the brightness and cleanness degree of the pulp; by adding the protease aqueous solution highly mixed with the pulp, lignin, resin, pigment, pectin, ash and the like in the plant fiber pulp are conveniently separated and cleaned under the high-temperature cooking action, so that the highly refined pulp is obtained.

Drawings

FIG. 1 is a schematic view showing a pretreatment mechanism of a plant fiber pulp pollution-free production apparatus according to the present invention;

FIG. 2 is a schematic view showing the distribution of main crushing rolls and auxiliary crushing rolls in a pretreatment mechanism of a plant fiber pulp pollution-free production apparatus according to the present invention;

FIG. 3 is a schematic view showing a screen structure in a pretreating mechanism of a plant fiber pulp pollution-free production apparatus according to the present invention;

FIG. 4 is a schematic view showing the structure of a deep processing mechanism of the non-polluting production apparatus for plant fiber pulp according to the present invention;

FIG. 5 is an enlarged view of a part A of a deep processing means of a plant fiber pulp pollution-free production apparatus according to the present invention

FIG. 6 is a schematic view showing a structure of a pulp making tank in a deep processing unit of an apparatus for pollution-free production of plant fiber pulp according to the present invention;

fig. 7 is a schematic view of a structure of a cooking chamber in a deep processing unit of an apparatus for pollution-free production of plant fiber pulp according to the present invention.

In the figure: 1 preprocessing mechanism, 2 deep processing mechanisms, 3 lower cylinder bodies, 4 upper cylinder bodies, 5 feed inlets, 6 first-stage motors, 7 crushing cutters, 8 second-stage motors, 9 third-stage motors, 10 main crushing mills, 11 auxiliary crushing mills, 12 guide rods, 13 springs, 14 screen meshes, 15 discharge ports, 16 cooking boxes, 17 cover bodies, 18 fourth-stage motors, 19 ball screws, 20 nuts, 21 pulping boxes, 22 limiting bolts, 23 limiting sleeves, 24 rotating shafts, 25 stirring shafts, 26 first-stage gears, 27 second-stage gears, 28 third-stage gears, 29 fourth-stage gears, 30 hydraulic controllers, 31 piston pipes, 32 pistons and 33 purification filter plates.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 7, a pollution-free production process of plant fiber pulp, comprising the steps of:

step S1, in the upper cylinder 4, the peeled, sectioned and cleaned log is sent to equipment to be crushed, purified water with the amount of 1-3 is sprinkled to the log in the equipment every 5-10min, and the humidity of the log is improved to ensure the structural rigidity of the log which can be crushed;

step S2, the cut log moves into the lower cylinder 3 under the action of gravity, the crushed log is squeezed for 1-1.5h, and 1.5-2 parts of alkaline solution is sprinkled to the log in the device every 25-30 min;

step S3, screening the squeezed log solid residue and the slurry, removing the macroscopic solid impurities in the slurry, then screening and separating the log by a screen 14 after being rolled and squeezed, adding 2-4 weight of distilled water into the slurry for dilution, wherein the distilled water can dilute the slurry and maintain the properties of the slurry;

step S4, delivering the diluted slurry to production equipment, adding 2-3 parts of sodium hydroxide solution with the concentration of 2% -3.5% into a slurry making box 21, mixing, continuously boiling the slurry at constant temperature of 80-95 ℃ for 2-4h, and fully fusing the slurry and the hydrogen peroxide solution through boiling;

step S5, standing and cooling for 0.5-1.5h to normal temperature, fishing out floating objects on the liquid level of the cleaned serous fluid, adding a brightening stripping agent with 3-5 weight parts and concentration of 10-20% into the serous fluid, and mixing;

step S6, adding a mixed solution of sodium hydroxide and sodium sulfide with a component concentration of 12% -18% to the slurry, continuously cooking at a constant temperature of 125 ℃ for 3-4.5h at 100-;

and step S7, continuously cooking for 2-4h at the constant temperature of 90-120 ℃, fishing the floating materials in the serous fluid for 5-7 times every 30-40min, standing and cooling to the normal temperature to obtain the seminal fluid.

It should be noted that:

firstly, in the deep processing mechanism 2, by controlling the hydraulic controller 30, the piston 32 is extended and contracted in the piston pipe 31, so that the purifying filter plate 3 is driven to move up and down in the pulping box 21, and the impurities in the pulp are filtered;

secondly, the four-stage motor 18 is controlled to operate, so that the ball screw 19 rotates, and the nut 20 drives the pulping box 21 to reciprocate horizontally by taking the limiting sleeve 23 as a guide so as to drive the pulp to flow;

thirdly, the ball screw 19 drives the rotating shaft 24 to rotate through a primary gear 26 and a secondary gear 27 which are connected in a meshed manner, and the rotating shaft 24 drives the stirring shaft 25 to rotate in two sides of the pulping box 21 through a tertiary gear 28 and a quaternary gear 29 which are connected in a meshed manner, so that the pulp in the pulping box 21 is stirred;

in step S2, the alkali solution is a 2% -4% normal temperature hydrogen peroxide solution, and the wood block can be subjected to acid leaching.

In the step S5, the floating objects comprise resin, pectin and ash, and the brightening stripping agent adopts an in-pulp additive and a drying cylinder coating excipient, so that the defects of pulp viscosity and powder falling can be overcome, the softness and smoothness of the plant fiber are improved, the friction between the pulp and the inner wall of the pulping box 21 is reduced, and the glossiness is ensured.

In the step S6, the mass ratio of the protease aqueous solution is 3-12%.

The float in step S7 includes lignin and pigment.

A pollution-free production device of plant fiber paper pulp comprises a pretreatment mechanism 1 and a deep treatment mechanism 2, wherein a discharge hole 15 of a lower cylinder 3 in the pretreatment mechanism 1 is connected with a pulping box 21 in the deep treatment mechanism 2;

the pretreatment mechanism 1 comprises a lower cylinder 3 and an upper cylinder 4, wherein the lower cylinder 3 is communicated with the upper cylinder 4, the lower cylinder 3 is provided with a discharge hole 15, the upper cylinder 4 is provided with a feed inlet 5, a first-stage motor 6 is fixedly arranged on the upper cylinder 4, the model of the first-stage motor 6 is HC-SFS301B, a crushing cutter 7 connected with the output end of the first-stage motor 6 is rotatably arranged in the upper cylinder 4, a second-stage motor 8 and a third-stage motor 9 are respectively and fixedly arranged at two sides of the lower cylinder 3, the models of the second-stage motor 8 and the third-stage motor 9 are HC-KFE13, the main crushing roller 10 and the auxiliary crushing roller 11 are driven by the two motors to rotate oppositely to squeeze the log fibers, the main crushing roller 10 and the auxiliary crushing roller 11 which are connected in a meshing manner are respectively connected at the output ends of the second-stage motor 8 and the third-stage motor 9, guide rods 12 are respectively welded in two sides of, the screen 14 can be moved up and down to filter and screen the raw wood fiber and the pulp;

the deep processing mechanism 2 comprises a cooking box 16 and a cover body 17 which are connected, a four-stage motor 18 is fixedly installed at the lower end of one side of the cooking box 16, the four-stage motor 18 adopts a servo motor with the model of HC-SFS202B, a ball screw 19 connected with the output end of the four-stage motor 18 is rotatably arranged at the lower end of the cooking box 16, a nut 20 is connected on the ball screw 19, a pulping box 21 is connected on the nut 20 through a bolt, a rotating shaft 24 and a stirring shaft 25 are rotatably arranged in two sides of the cooking box 16, a first-stage gear 26 and a second-stage gear 27 which are meshed with each other are respectively sleeved on the ball screw 19 and the rotating shaft 24, a third-stage gear 28 and a fourth-stage gear 29 which are meshed with each other are respectively sleeved on the rotating shaft 24 and the stirring shaft 25, a hydraulic controller 30 is fixedly arranged at the upper end of the cover body 17, the model of the, the piston 32 is slidably sleeved in the piston pipe 31, the free end of the piston 32 is connected with the purifying filter plate 33 through a pin shaft, and the telescopic piston 32 can drive the purifying filter plate 33 to move up and down so as to clean impurities in the slurry.

Step S1-step S3 are performed in the preprocessing mechanism 1, and step S4-step S7 are performed in the deep processing mechanism 2.

Main crushing roller 10 and supplementary crushing roller 11 level are located barrel 3 down correspondingly, and guide bar 12 lower extreme is located to spring 13 fixed cover, and both ends sliding sleeve locates screen cloth 14 of guide bar 12 upper end and is located main crushing roller 10 and supplementary crushing roller 11 under, and the main crushing roller 10 that utilizes the meshing connection can roll the log fibre with supplementary crushing roller 11 and squeeze.

Stop collar 23 of horizontal welding in boiling box 16 both sides, and the outer horizontal welding of slurrying case 21 both sides has the stop collar 22 that slip cap located in stop collar 23, can lead spacingly to horizontally shifting's slurrying case 21 to ensure the stability of slurrying case 21.

The rotating shafts 24 are vertically arranged in two sides of the cooking box 16, the stirring shafts 25 are vertically arranged in two sides of the pulping box 21, and the stirring shafts 25 cannot contact with the inner wall of the pulping box 21 in the horizontal moving process of the pulping box 21.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.