阅读说明：本技术 用于箱板纸的木屑纤维预处理工艺 (Wood chip fiber pretreatment process for cardboard paper ) 是由 李文斌 陈满 于 2021-07-30 设计创作，主要内容包括：本发明属于木屑纤维处理领域,尤其是一种用于箱板纸的木屑纤维预处理工艺,针对现有的对木屑纤维的使用研究较少,仅仅局限于木屑纤维的直接应用,使用效果不好的问题,现提出如下方案,其包括以下步骤：S1、将木屑纤维放入溶解槽内,加入水,然后加入纤维素酶和木聚糖酶,加热,进行预溶解；S2、通过温度传感器对溶解槽内的温度进行检测,并将检测的数据传输至控制器,当温度达到预设温度时,通过温控器进行保温；S3、加热完成后,对溶解情况进行观察,当达到预设的溶解要求后,记录所用时间及所用温度,得到溶解料；S4、将溶解料放入碎解机内进行碎解处理；本发明可以提高木屑纤维的洁净度、强度以及留着率。(The invention belongs to the field of wood chip fiber treatment, in particular to a wood chip fiber pretreatment process for boxboard paper, which aims at solving the problems that the existing wood chip fiber is less in use research, only limited in direct application of the wood chip fiber and poor in use effect, and provides the following scheme, comprising the following steps: s1, putting the wood chip fiber into a dissolving tank, adding water, then adding cellulase and xylanase, heating and pre-dissolving; s2, detecting the temperature in the dissolving tank through a temperature sensor, transmitting the detected data to a controller, and preserving the heat through a temperature controller when the temperature reaches a preset temperature; s3, observing the dissolving condition after heating, and recording the used time and the used temperature after the preset dissolving requirement is met to obtain a dissolved material; s4, putting the dissolved material into a crusher for crushing treatment; the invention can improve the cleanliness, strength and retention rate of the wood chip fiber.)

1. The wood chip fiber pretreatment process for the cardboard paper is characterized by comprising the following steps of:

s1, putting the wood chip fiber into a dissolving tank, adding water, then adding cellulase and xylanase, heating and pre-dissolving;

s2, detecting the temperature in the dissolving tank through a temperature sensor, transmitting the detected data to a controller, and preserving the heat through a temperature controller when the temperature reaches a preset temperature;

s3, observing the dissolving condition after heating, and recording the used time and the used temperature after the preset dissolving requirement is met to obtain a dissolved material;

s4, putting the dissolved material into a crusher for crushing treatment;

s5, detecting the pH value and the temperature of the material in the disintegrator, and recording the time for disintegration;

and S6, defibering, removing impurities and purifying the materials discharged by the disintegrator.

2. The wood chip fiber pretreatment process for boxboard as claimed in claim 1, wherein in the step S1, wood chip fiber is quantified, the quantified wood chip fiber is added into a dissolving tank, water is pumped into the dissolving tank by a water pump, the amount of water is monitored by a flow sensor, and the wood chip fiber is stirred by a stirring mechanism while being added with water, wherein the stirring speed is 200-.

3. The wood chip fiber pretreatment process for linerboards according to claim 1, wherein the data amount of the temperature sensors is 6-10, the 6-10 temperature sensors are uniformly distributed in the dissolving tank, the temperature of different positions is detected, when the data detected by the 6-10 temperature sensors are consistent, the data is transmitted to the controller, and the preset temperature is 40-50 ℃.

4. The wood chip fiber pretreatment process for cardboard paper as claimed in claim 1, wherein in S5, the PH value of the material is detected by a PH detector, the temperature of the material is detected by a temperature detection probe, the disintegration time is set, when the disintegration time is reached, the disintegration machine is turned off, the material sample is taken out, the sample is observed to see whether the disintegration requirement is met, the material is discharged when the disintegration requirement is met, and the disintegration is continued when the disintegration requirement is not met.

5. The process of claim 1, wherein in step S1, the cellulase and xylanase are screened, the screened cellulase and xylanase are quantified, the cellulase and xylanase are placed in a feeding hopper, and an electromagnetic valve at a discharge port of the feeding hopper is opened to feed the cellulase and xylanase.

6. The wood chip fiber pretreatment process for cardboard paper as claimed in claim 1, wherein in S6, the fluffed material is fed into a screening device for screening, and after the screening is finished, the screen is washed by a backwash head.

7. The wood chip fiber pretreatment process for cardboard paper as claimed in claim 1, wherein in the step S6, the defibered material is fed into a hopper, a valve on the hopper is opened to allow the material to enter the screening device, the valve is opened for 3-5S and closed for 2-3S, and in this way, the material is intermittently added.

8. The wood chip fiber pretreatment process for linerboards according to claim 1, wherein in S6, the fluffed material is fed into a screening device to be screened, the material passing through a screen is collected and measured, the screened material is collected and measured, and the measurement data is recorded.

Technical Field

The invention relates to the technical field of wood chip fiber treatment, in particular to a wood chip fiber pretreatment process for boxboard paper.

Background

The main fiber raw materials of paper making enterprises in China are imported, wherein one fiber raw material is from imported paper pulp (such as wood pulp, waste paper pulp and the like) and imported waste paper, and the other fiber raw material is from domestic products, such as domestic wood pulp, non-wood pulp, domestic waste paper and the like. The total consumption of pulp in the country in 2018 is 9387 ten thousand tons, which is reduced by 6.61% compared with 2017. The consumption of wood pulp is 3303 ten thousand tons, which accounts for 35% of the total consumption of the wood pulp, wherein the imported wood pulp accounts for 23%, and the domestic wood pulp accounts for 12%; 5474 ten thousand tons of waste paper pulp accounts for 58 percent of the total consumption of the paper pulp, wherein 16 percent of the pulp is made by using imported waste paper and 42 percent of the pulp is made by using domestic waste paper; the non-wood pulp accounts for 610 ten thousand tons, and accounts for 7 percent of the total consumption of the pulp.

The data show that the raw material structure mainly comprising the waste paper raw material is derived in the paper making industry of China, and the proportion of the waste paper raw material is nearly 60%. Since 2016, the sudden reduction of external waste has forced paper-making enterprises to make great adjustments in raw material procurement, production process, product structure, etc., and before the adjustments are completely made, the wrapping paper production enterprises are facing two major challenges: (1) according to the per-capita consumption level of the packing paper, the current per-capita consumption of China still far reaches the level of developed countries, and the future capacity of the packing paper still has a larger increase space. At the same time, the external waste material inlet is restricted and the difference between the supply and demand of the material must be supplemented by other fiber materials. (2) With the improvement of the national standard of living, the requirement on the paper quality is higher and higher, the fiber strength of domestic waste paper is greatly reduced after the domestic waste paper is continuously recycled, and the national waste fiber can not meet the quality requirement even if the current situation of the quality requirement on the base paper is maintained.

To meet the challenge, paper making companies are seeking new materials to replace waste paper materials. Sawdust fiber, also called wood fiber raw material, has a great price advantage and belongs to the category of leftover waste, and thus, the sawdust fiber is paid attention to paper making research and development personnel.

At present, the use research of the wood chip fiber is less, the wood chip fiber is only limited to direct application of the wood chip fiber, and the use effect is poor.

Disclosure of Invention

The invention aims to solve the defects that the use research of the wood chip fiber is less, the wood chip fiber is only limited to direct application of the wood chip fiber, and the use effect is poor in the prior art, and provides a wood chip fiber pretreatment process for the cardboard paper.

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

the wood chip fiber pretreatment process for the cardboard paper comprises the following steps:

s1, putting the wood chip fiber into a dissolving tank, adding water, then adding cellulase and xylanase, heating and pre-dissolving;

s2, detecting the temperature in the dissolving tank through a temperature sensor, transmitting the detected data to a controller, and preserving the heat through a temperature controller when the temperature reaches a preset temperature;

s3, observing the dissolving condition after heating, and recording the used time and the used temperature after the preset dissolving requirement is met to obtain a dissolved material;

s4, putting the dissolved material into a crusher for crushing treatment;

s5, detecting the pH value and the temperature of the material in the disintegrator, and recording the time for disintegration;

and S6, defibering, removing impurities and purifying the materials discharged by the disintegrator.

Preferably, in S1, the wood chip fibers are quantified, the quantified wood chip fibers are added into the dissolving tank, water is pumped into the dissolving tank by a water pump, the amount of water is monitored by a flow sensor, and the wood chip fibers are stirred by a stirring mechanism while being added with water, wherein the stirring speed is 200-300 r/min.

Preferably, the data volume of the temperature sensors is 6-10, the 6-10 temperature sensors are uniformly distributed in the dissolving tank, the temperature at different positions is detected, when the data detected by the 6-10 temperature sensors are consistent, the data is transmitted to the controller, and the preset temperature is 40-50 ℃.

Preferably, in S5, detect the PH value of material through the PH detector, detect the temperature of material through the temperature detection probe simultaneously, set up the disintegration time, when reaching the disintegration time, close the disintegrator, take out the material sample, observe the sample, see whether reach the disintegration requirement, reach then discharge the material, not reach then continue the disintegration.

Preferably, in S1, the cellulase and xylanase are screened, the screened cellulase and xylanase are quantified, the cellulase and xylanase are put into a feeding hopper after quantification is completed, and an electromagnetic valve at a discharge port of the feeding hopper is opened to feed the cellulase and xylanase.

Preferably, in S6, the fluffed material is fed to a screening device for screening, and after the screening is completed, the screen is washed by the backwash head.

Preferably, in S6, the fluffed material is put into the feeding hopper, a valve on the feeding hopper is opened to allow the material to enter the screening device, the valve is opened for 3 to 5 seconds and closed for 2 to 3 seconds, and in this way, the material is intermittently added.

Preferably, in S6, the fluffed material is fed into a screening device to be screened, the material passing through the screen is collected and measured, the screened material is collected and measured, and the measurement data is recorded.

Compared with the prior art, the invention has the beneficial effects that:

wood chip fibers are pretreated, the wood chip fibers are dissolved and disintegrated in a mode of combining physical treatment and chemical treatment, and then proper deslagging and screening equipment and a proper process are selected for purification treatment, so that the cleanliness, the strength and the retention rate of the wood chip fibers are improved;

the wood chip fiber is applied to the production of the cardboard paper, so that the use of waste paper raw materials can be reduced, and the problem of shortage of raw materials is solved;

the invention can improve the cleanliness, strength and retention rate of the wood chip fiber.

Drawings

Fig. 1 is a flow chart of the wood chip fiber pretreatment process for boxboard paper according to the present invention.

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.

Example one

Referring to fig. 1, the wood chip fiber pretreatment process for boxboard paper comprises the following steps:

s1, putting the wood chip fiber into a dissolving tank, adding water, then adding cellulase and xylanase, heating and pre-dissolving;

s2, detecting the temperature in the dissolving tank through a temperature sensor, transmitting the detected data to a controller, and preserving the heat through a temperature controller when the temperature reaches a preset temperature;

s3, observing the dissolving condition after heating, and recording the used time and the used temperature after the preset dissolving requirement is met to obtain a dissolved material;

s4, putting the dissolved material into a crusher for crushing treatment;

s5, detecting the pH value and the temperature of the material in the disintegrator, and recording the time for disintegration;

and S6, defibering, removing impurities and purifying the materials discharged by the disintegrator.

In this embodiment, carry out the ration to the saw-dust fibre, add the dissolving tank with the saw-dust fibre after the ration, take out water through the water pump in the dissolving tank, monitor the water yield through flow sensor, when adding water, stir through rabbling mechanism, the stirring speed is 200 r/min.

In this embodiment, temperature sensor's data volume is 6, with 6 even distributions of temperature sensor in the dissolving tank, detects the temperature of different positions, when the data that 6 temperature sensor detected are unanimous, transmits this data to the controller, and the preset temperature is 40 ℃.

In this embodiment, detect the PH value of material through the PH detector, detect the temperature of material through the temperature detection probe simultaneously, set up the disintegration time, when reaching the disintegration time, close the disintegration machine, take out the material sample, observe the sample, see whether reach the disintegration requirement, reach then discharge the material, not reach then continue the disintegration.

In this embodiment, in S1, the cellulase and the xylanase are screened, the screened cellulase and xylanase are quantified, the cellulase and xylanase are put into a feeding hopper after the quantification is completed, and an electromagnetic valve at a discharge port of the feeding hopper is opened to feed the cellulase and the xylanase.

In this embodiment, in S6, the fluffed material is put into a screening device for screening, and after the screening is completed, the screen is washed by the backwash head.

In this embodiment, in S6, the fluffed material is put into the hopper, and the valve on the hopper is opened to allow the material to enter the screening device, and the valve is opened for 3 seconds and closed for 2 seconds.

In this embodiment, in S6 and S6, the fluffed material is put into a screening device to be screened, the material passing through the screen is collected and measured, the screened material is collected and measured, and the measurement data is recorded.

Example two

Referring to fig. 1, the wood chip fiber pretreatment process for boxboard paper comprises the following steps:

s1, putting the wood chip fiber into a dissolving tank, adding water, then adding cellulase and xylanase, heating and pre-dissolving;

s2, detecting the temperature in the dissolving tank through a temperature sensor, transmitting the detected data to a controller, and preserving the heat through a temperature controller when the temperature reaches a preset temperature;

s3, observing the dissolving condition after heating, and recording the used time and the used temperature after the preset dissolving requirement is met to obtain a dissolved material;

s4, putting the dissolved material into a crusher for crushing treatment;

s5, detecting the pH value and the temperature of the material in the disintegrator, and recording the time for disintegration;

and S6, defibering, removing impurities and purifying the materials discharged by the disintegrator.

In this embodiment, carry out the ration to the saw-dust fibre, add the dissolving tank with the saw-dust fibre after the ration, take out water through the water pump in the dissolving tank, monitor the water yield through flow sensor, when adding water, stir through rabbling mechanism, the stirring speed is 220 r/min.

In this embodiment, temperature sensor's data volume is 7, with 7 even distributions of temperature sensor in the dissolving tank, detects the temperature of different positions, when the data that 7 temperature sensor detected are unanimous, transmits this data to the controller, and preset temperature is 42 ℃.

In this embodiment, detect the PH value of material through the PH detector, detect the temperature of material through the temperature detection probe simultaneously, set up the disintegration time, when reaching the disintegration time, close the disintegration machine, take out the material sample, observe the sample, see whether reach the disintegration requirement, reach then discharge the material, not reach then continue the disintegration.

In this embodiment, in S1, the cellulase and the xylanase are screened, the screened cellulase and xylanase are quantified, the cellulase and xylanase are put into a feeding hopper after the quantification is completed, and an electromagnetic valve at a discharge port of the feeding hopper is opened to feed the cellulase and the xylanase.

In this embodiment, in S6, the fluffed material is put into a screening device for screening, and after the screening is completed, the screen is washed by the backwash head.

In this embodiment, in S6, the fluffed material is put into the hopper, and the valve on the hopper is opened to allow the material to enter the screening device, and the valve is opened for 3 seconds and closed for 2 seconds.

In this embodiment, in S6 and S6, the fluffed material is put into a screening device to be screened, the material passing through the screen is collected and measured, the screened material is collected and measured, and the measurement data is recorded.

EXAMPLE III

Referring to fig. 1, the wood chip fiber pretreatment process for boxboard paper comprises the following steps:

s1, putting the wood chip fiber into a dissolving tank, adding water, then adding cellulase and xylanase, heating and pre-dissolving;

s2, detecting the temperature in the dissolving tank through a temperature sensor, transmitting the detected data to a controller, and preserving the heat through a temperature controller when the temperature reaches a preset temperature;

s3, observing the dissolving condition after heating, and recording the used time and the used temperature after the preset dissolving requirement is met to obtain a dissolved material;

s4, putting the dissolved material into a crusher for crushing treatment;

s5, detecting the pH value and the temperature of the material in the disintegrator, and recording the time for disintegration;

and S6, defibering, removing impurities and purifying the materials discharged by the disintegrator.

In this embodiment, carry out the ration to the saw-dust fibre, add the dissolving tank with the saw-dust fibre after the ration, take out water through the water pump in the dissolving tank, monitor the water yield through flow sensor, when adding water, stir through rabbling mechanism, the stirring speed is 260 r/min.

In this embodiment, temperature sensor's data volume is 8, with 8 even distributions of temperature sensor in the dissolving tank, detects the temperature of different positions, when the data that 8 temperature sensor detected are unanimous, transmits this data to the controller, and the preset temperature is 44 ℃.

In this embodiment, detect the PH value of material through the PH detector, detect the temperature of material through the temperature detection probe simultaneously, set up the disintegration time, when reaching the disintegration time, close the disintegration machine, take out the material sample, observe the sample, see whether reach the disintegration requirement, reach then discharge the material, not reach then continue the disintegration.

In this embodiment, in S1, the cellulase and the xylanase are screened, the screened cellulase and xylanase are quantified, the cellulase and xylanase are put into a feeding hopper after the quantification is completed, and an electromagnetic valve at a discharge port of the feeding hopper is opened to feed the cellulase and the xylanase.

In this embodiment, in S6, the fluffed material is put into a screening device for screening, and after the screening is completed, the screen is washed by the backwash head.

In this embodiment, in S6, the fluffed material is put into the hopper, and the valve on the hopper is opened to allow the material to enter the screening device, and the valve is opened for 3 seconds and closed for 2 seconds.

In this embodiment, in S6 and S6, the fluffed material is put into a screening device to be screened, the material passing through the screen is collected and measured, the screened material is collected and measured, and the measurement data is recorded.

Example four

Referring to fig. 1, the wood chip fiber pretreatment process for boxboard paper comprises the following steps:

s1, putting the wood chip fiber into a dissolving tank, adding water, then adding cellulase and xylanase, heating and pre-dissolving;

s2, detecting the temperature in the dissolving tank through a temperature sensor, transmitting the detected data to a controller, and preserving the heat through a temperature controller when the temperature reaches a preset temperature;

s3, observing the dissolving condition after heating, and recording the used time and the used temperature after the preset dissolving requirement is met to obtain a dissolved material;

s4, putting the dissolved material into a crusher for crushing treatment;

s5, detecting the pH value and the temperature of the material in the disintegrator, and recording the time for disintegration;

and S6, defibering, removing impurities and purifying the materials discharged by the disintegrator.

In this embodiment, carry out the ration to the saw-dust fibre, add the dissolving tank with the saw-dust fibre after the ration, take out water to the dissolving tank in through the water pump, monitor the water yield through flow sensor, when adding water, stir through rabbling mechanism, the stirring speed is 280 r/min.

In this embodiment, temperature sensor's data volume is 9, with the even distribution of 9 temperature sensor in the dissolving tank, detects the temperature of different positions, when the data that 9 temperature sensor detected are unanimous, transmits this data to the controller, and preset temperature is 46 ℃.

In this embodiment, detect the PH value of material through the PH detector, detect the temperature of material through the temperature detection probe simultaneously, set up the disintegration time, when reaching the disintegration time, close the disintegration machine, take out the material sample, observe the sample, see whether reach the disintegration requirement, reach then discharge the material, not reach then continue the disintegration.

In this embodiment, in S1, the cellulase and the xylanase are screened, the screened cellulase and xylanase are quantified, the cellulase and xylanase are put into a feeding hopper after the quantification is completed, and an electromagnetic valve at a discharge port of the feeding hopper is opened to feed the cellulase and the xylanase.

In this embodiment, in S6, the fluffed material is put into a screening device for screening, and after the screening is completed, the screen is washed by the backwash head.

In this embodiment, in S6, the fluffed material is put into the hopper, the valve on the hopper is opened to allow the material to enter the screening device, the valve is opened for 4S and closed for 2.5S, and the material is intermittently added in this way.

In this embodiment, in S6 and S6, the fluffed material is put into a screening device to be screened, the material passing through the screen is collected and measured, the screened material is collected and measured, and the measurement data is recorded.

EXAMPLE five

Referring to fig. 1, the wood chip fiber pretreatment process for boxboard paper comprises the following steps:

s1, putting the wood chip fiber into a dissolving tank, adding water, then adding cellulase and xylanase, heating and pre-dissolving;

s2, detecting the temperature in the dissolving tank through a temperature sensor, transmitting the detected data to a controller, and preserving the heat through a temperature controller when the temperature reaches a preset temperature;

s3, observing the dissolving condition after heating, and recording the used time and the used temperature after the preset dissolving requirement is met to obtain a dissolved material;

s4, putting the dissolved material into a crusher for crushing treatment;

s5, detecting the pH value and the temperature of the material in the disintegrator, and recording the time for disintegration;

and S6, defibering, removing impurities and purifying the materials discharged by the disintegrator.

In this embodiment, carry out the ration to the saw-dust fibre, add the dissolving tank with the saw-dust fibre after the ration, take out water through the water pump in the dissolving tank, monitor the water yield through flow sensor, when adding water, stir through rabbling mechanism, the stirring speed is 300 r/min.

In this embodiment, temperature sensor's data volume is 10, with 10 even distributions of temperature sensor in the dissolving tank, detects the temperature of different positions, when the data that 10 temperature sensor detected are unanimous, transmits this data to the controller, and preset temperature is 50 ℃.

In this embodiment, detect the PH value of material through the PH detector, detect the temperature of material through the temperature detection probe simultaneously, set up the disintegration time, when reaching the disintegration time, close the disintegration machine, take out the material sample, observe the sample, see whether reach the disintegration requirement, reach then discharge the material, not reach then continue the disintegration.

In this embodiment, in S1, the cellulase and the xylanase are screened, the screened cellulase and xylanase are quantified, the cellulase and xylanase are put into a feeding hopper after the quantification is completed, and an electromagnetic valve at a discharge port of the feeding hopper is opened to feed the cellulase and the xylanase.

In this embodiment, in S6, the fluffed material is put into a screening device for screening, and after the screening is completed, the screen is washed by the backwash head.

In this embodiment, in S6, the fluffed material is put into the hopper, the valve on the hopper is opened to allow the material to enter the screening device, and the valve is opened for 5S and closed for 3S, so as to intermittently add the material.

In this embodiment, in S6, the fluffed material is put into a screening device to be screened, the material passing through the screen is collected and measured, the screened material is collected and measured, and the measurement data is recorded.

The wood chip fiber dissolution temperature and the used time of the first to fifth examples are as follows:

examples	A	II	III	Fourthly	Five of them
						Temperature/. degree.C	40	42	44	46	50
Time/min	55	54	53	52	51

Main technical indexes of boxboard paper made by mixing wood chip fiber raw material and waste paper fiber raw material

(1) The quality index of the finished paper reaches the index requirement of B series in the enterprise standard Q/320581GEV001-2019 cardboard paper, and the tightness is more than or equal to 0.70g/cm³The burst index is not less than 1.80 kPa.m²G, ring pressure index is more than or equal to 4.00 N.m/g, and water absorption (normal/reverse) is less than or equal to 60/80g/m²The smoothness is more than or equal to 7.0s, and the delivery moisture is 8.0 +/-2.0%.

(2) The usage amount of the waste paper is reduced by 5 percent, the unit consumption of the waste paper is reduced to be less than 1.10, the cost of the comprehensive chemicals is increased, the cost per ton of paper is reduced by about 15-20 yuan, and the annual cost is reduced by about 450 ten thousand yuan.

(3) The comprehensive energy consumption of a unit product is less than or equal to 60 kgce/Adt.

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.