阅读说明：本技术 一种制造甘蔗渣浆的工艺 (Process for manufacturing bagasse pulp ) 是由 刘洁 赵晓兵 于 2020-12-16 设计创作，主要内容包括：本发明涉及纸浆制备的技术领域,具体而言,涉及一种制造甘蔗渣浆的工艺。制造甘蔗渣浆的工艺,将甘蔗渣储存发酵,然后经除杂设备进行除杂,再将甘蔗渣送入预浸池进行浸泡,然后将甘蔗渣送入高浓度磨浆机进行疏解和切断得到甘蔗渣浆,再将甘蔗渣浆送入洗浆机洗涤,再将甘蔗渣浆进行分丝、帚化,然后将甘蔗渣浆脱水浓缩制成粗浆成品。此工艺具有步骤简单、成本低的优点,且制备的甘蔗渣浆品质高。(The invention relates to the technical field of paper pulp preparation, in particular to a process for manufacturing bagasse pulp. The process for manufacturing the bagasse pulp comprises the steps of storing and fermenting bagasse, removing impurities through impurity removing equipment, soaking the bagasse in a pre-soaking tank, sending the bagasse into a high-concentration pulping machine for defibering and cutting to obtain the bagasse pulp, sending the bagasse pulp into a pulp washer for washing, carrying out devillicating and brooming on the bagasse pulp, and dewatering and concentrating the bagasse pulp to obtain a coarse pulp finished product. The process has the advantages of simple steps and low cost, and the prepared bagasse pulp has high quality.)

1. A process for manufacturing bagasse pulp, characterized in that: the bagasse is stored and fermented, then impurity removal is carried out by impurity removal equipment, the bagasse is sent into a pre-soaking pool to be soaked, then the bagasse is sent into a high-concentration pulp mill to be defibered and cut to obtain bagasse pulp, then the bagasse pulp is sent into a pulp washer to be washed, the bagasse pulp is devillished and broomed, and then the bagasse pulp is dehydrated and concentrated to prepare a coarse pulp finished product.

2. A process for manufacturing bagasse pulp according to claim 1, characterized in that: the storage and fermentation time of the bagasse is as follows: 2.5-3.5 months, the fermentation temperature is as follows: 23-35 ℃.

3. A process for manufacturing bagasse pulp according to claim 1, characterized in that: and washing the bagasse by adopting impurity removal equipment after fermentation to remove impurities.

4. A process for manufacturing bagasse pulp according to claim 1, characterized in that: and soaking the bagasse in a pre-soaking tank by using water, wherein the using amount of the water is larger than that of the bagasse in the pre-soaking tank.

5. A process of manufacturing bagasse pulp according to claim 4, characterized in that: when bagasse is soaked in water in a pre-soaking tank, sodium hydroxide is added into the water, and the concentration of the sodium hydroxide is as follows: 2-4%.

6. Process for manufacturing bagasse pulp according to claim 4 or 5, characterized in that: when the bagasse is soaked in the pre-soaking tank, water vapor is added, and the soaking temperature is as follows: 35-40 ℃, and the soaking time is as follows: 8-12 h.

7. A process for manufacturing bagasse pulp according to claim 1, characterized in that: the beating degree of bagasse pulp obtained by defibering and cutting bagasse by a high-concentration pulping machine is as follows: 22-26 ° SR.

8. A process for manufacturing bagasse pulp according to claim 1, characterized in that: and (3) recovering the washing liquid obtained after the bagasse pulp is sent into the pulp washer to be washed into the pre-soaking pool for soaking bagasse.

9. A process for manufacturing bagasse pulp according to claim 1, characterized in that: the bagasse pulp is subjected to devillicating and brooming through an ultrasonic reactor.

10. A process for manufacturing bagasse pulp according to claim 1, characterized in that: and the bagasse pulp is dewatered and concentrated by a rotary screen farm compressor.

Technical Field

The invention relates to the technical field of paper pulp preparation, in particular to a process for manufacturing bagasse pulp.

Background

In recent years, the average amount of pulp consumed per year in China is about 9X 10⁷t, the main raw materials for pulping and papermaking comprise wood fibers, non-wood fibers and secondary fibers, wherein the most important raw materials are wood fibers. The forest coverage area of China only accounts for 20 percent of the territorial area, the supply of paper making raw materials is insufficient, paper making wood pulp is mostly dependent on import, and the shortage date of wood resources in the world at presentThe increasing of the demand, the production of paper pulp and paper making under the condition of not damaging forests and environment is called the goal pursued by each paper making enterprise.

As a big agricultural country in China, the bagasse is high in yield, the bagasse is directly combusted, the thermal efficiency is not high, pulp is produced, high-quality paper can be obtained, pulp and other residual organic matters removed from the bagasse can be efficiently converted into steam through an alkali recovery reactor, the steam is firstly used for power generation and then used for pulping and papermaking, waste water in the stacking and storing process can be converted into biogas fuel, and the produced paper can be finally converted into biomass energy after being used. Different from direct combustion, the method reduces consumption of wood raw materials and improves resource utilization efficiency and economic added value of industrial waste residues while obtaining paper pulp and recovering energy.

The traditional process for manufacturing the bagasse pulp generates more black liquor, and the black liquor contains a large amount of lignin, suspended solids, organic pollutants and toxic substances, so that the quality of the bagasse pulp is low.

Disclosure of Invention

The invention aims to provide a process for preparing bagasse pulp, which has the advantages of simple steps and low cost, and the prepared bagasse pulp has high quality.

The technical problem to be solved by the invention is realized by adopting the following technical scheme.

The invention provides a process for preparing bagasse pulp, which comprises the steps of storing and fermenting bagasse, removing impurities by impurity removing equipment, soaking the bagasse in a presoaking tank, sending the bagasse into a high-concentration pulping machine for defibering and cutting to obtain the bagasse pulp, sending the bagasse pulp into a pulp washer for washing, devillicating and brooming the bagasse pulp, and dehydrating and concentrating the bagasse pulp to obtain a coarse pulp finished product.

Further, the storage and fermentation time of the bagasse is as follows: 2.5-3.5 months, the fermentation temperature is as follows: 23-35 ℃.

Further, the bagasse is fermented and then washed by impurity removal equipment to remove impurities.

Furthermore, the bagasse is soaked in water in a pre-soaking pool, and the amount of the water is larger than that of the bagasse in the pre-soaking pool.

Further, when the bagasse is soaked in water in a pre-soaking tank, sodium hydroxide is added into the water, and the concentration of the sodium hydroxide is as follows: 2-4%.

Further, when the bagasse is soaked in the pre-soaking tank, water vapor is added, and the soaking temperature is as follows: 35-40 ℃, and the soaking time is as follows: 8-12 h.

Further, the bagasse pulp obtained by defibering and cutting the bagasse by a high-concentration pulping machine has a beating degree of: 22-26 ° SR.

Further, washing liquid obtained after the bagasse pulp is sent into a pulp washer to be washed is recycled into the pre-soaking pool to be used for soaking bagasse.

Further, the bagasse pulp is subjected to devillicate and brooming through an ultrasonic reactor.

Further, the bagasse pulp is dewatered and concentrated by a rotary screen farm compressor.

The process for manufacturing the bagasse pulp provided by the embodiment of the invention at least has the following advantages or beneficial effects:

the bagasse is stored and fermented, residual sugar is degraded, then dust and sugar in the bagasse are removed through impurity removal equipment, the bagasse is sent into a pre-soaking tank to be soaked, fibers can be fully swelled and softened, subsequent grinding is facilitated, the bagasse is sent into a high-concentration pulp grinder to be discongested and cut to obtain bagasse pulp, the bagasse pulp is sent into a pulp washer to be washed, the saccharides and lignin in pulp are removed, the bagasse pulp is devillished and broomed, the fibers are swelled, and then the bagasse pulp is dewatered and concentrated to prepare a coarse pulp finished product. The process for preparing the bagasse pulp has less black liquor, is more environment-friendly, uses water in 1/3 amount of conventional sugarcane pulp, consumes less electricity and has low preparation cost.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to specific examples.

The embodiment of the application provides a process for manufacturing bagasse pulp, wherein bagasse is stored and fermented, then impurity removal is carried out through impurity removal equipment, the bagasse is sent into a pre-soaking tank to be soaked, then the bagasse is sent into a high-concentration pulping machine to be defibered and cut to obtain the bagasse pulp, the bagasse pulp is sent into a pulp washer to be washed, the bagasse pulp is subjected to devillicating and brooming, and then the bagasse pulp is dehydrated and concentrated to be made into a coarse pulp finished product.

The bagasse is stored and fermented, residual sugar is degraded, then dust and sugar in the bagasse are removed through impurity removal equipment, the bagasse is sent into a pre-soaking tank to be soaked, fibers can be fully swelled and softened, subsequent grinding is facilitated, the bagasse is sent into a high-concentration pulp grinder to be discongested and cut to obtain bagasse pulp, the bagasse pulp is sent into a pulp washer to be washed, the saccharides and lignin in pulp are removed, the bagasse pulp is devillished and broomed, the fibers are swelled, and then the bagasse pulp is dewatered and concentrated to prepare a coarse pulp finished product. The process for preparing the bagasse pulp has less black liquor, is more environment-friendly, uses water in 1/3 amount of conventional sugarcane pulp, consumes less electricity and has low preparation cost.

Further, the storage and fermentation time of the bagasse is 2.5-3.5 months at normal temperature. The fermentation time, temperature and humidity can effectively degrade sugar in the bagasse and improve the impurity content of the bagasse pulp.

Further, the bagasse is fermented and then washed by impurity removal equipment to remove impurities. The washing impurity removal cost is low, the impurity removal effect is good, and new impurities can not be introduced.

Furthermore, the bagasse is soaked in water in a pre-soaking pool, and the amount of the water is larger than that of the bagasse in the pre-soaking pool. The water consumption can be completely soaked in the bagasse, and better assists subsequent grinding.

Further, when the bagasse is soaked in water in a pre-soaking tank, sodium hydroxide is added into the water, and the concentration of the sodium hydroxide is as follows: 2-4%.

Further, when the bagasse is soaked in the pre-soaking tank, water vapor is added, and the soaking temperature is as follows: 35-40 ℃, and the soaking time is as follows: 8-12 h. By adopting the soaking temperature, the soaking time can be effectively saved, the production efficiency is improved, and simultaneously, the fibers in the bagasse are not damaged.

Further, the bagasse pulp obtained by defibering and cutting the bagasse by a high-concentration pulping machine has a beating degree of: 22-26 ° SR. The beating degree can ensure the integrity of fiber, reduce the damage of fiber cells and improve the quality of the finished product of the bagasse pulp.

Further, washing liquid obtained after the bagasse pulp is sent into a pulp washer to be washed is recycled into the pre-soaking pool to be used for soaking bagasse. Therefore, the washed washing liquid is recycled, the heat of the washing liquid in the pulp washer can be recycled, and the process is more energy-saving and environment-friendly.

Further, the bagasse pulp is subjected to devillicate and brooming through an ultrasonic reactor. The ultrasonic reactor is used for devillicating and brooming, so that the cellulose of the bagasse pulp can be ensured, and the bagasse pulp can be thoroughly devillicated and broomed.

Further, the bagasse pulp is dewatered and concentrated by a rotary screen farm compressor.

The features and properties of the present invention are described in further detail below with reference to examples.

Example 1

This example provides a process for making bagasse pulp comprising the steps of:

storing and fermenting bagasse for the following time: 2.5 months, the fermentation temperature is as follows: washing with water at 23 ℃ by using impurity removal equipment to remove impurities, soaking bagasse in a pre-soaking pool, wherein the amount of water is larger than that of the bagasse in the pre-soaking pool, and adding sodium hydroxide into the water, wherein the concentration of the sodium hydroxide in the water is as follows: 2 percent, adding water vapor when bagasse is soaked in a pre-soaking tank, wherein the soaking temperature is as follows: the soaking time is as follows at 35 ℃: and 8h, then sending the bagasse into a high-concentration pulping machine for defibering and cutting to obtain bagasse pulp, wherein the beating degree of the bagasse pulp is as follows: and (2) 22 DEG SR, feeding the bagasse pulp into a pulp washer for washing, recovering the washing liquid of the washed bagasse pulp fed into the pulp washer into a pre-soaking pool for soaking bagasse, carrying out devillicating and brooming on the bagasse pulp through an ultrasonic reactor, and then dehydrating and concentrating the bagasse pulp through a rotary screen farm compressor to obtain a coarse pulp finished product.

Example 2

This example provides a process for making bagasse pulp comprising the steps of:

storing and fermenting bagasse for the following time: 3 months, the fermentation temperature is: washing with water at 25 ℃ by using impurity removal equipment to remove impurities, soaking bagasse in a pre-soaking pool, wherein the amount of water is larger than that of the bagasse in the pre-soaking pool, and adding sodium hydroxide into the water, wherein the concentration of the sodium hydroxide in the water is as follows: 4 percent, adding water vapor when bagasse is soaked in a pre-soaking tank, wherein the soaking temperature is as follows: the soaking time is as follows at 40 ℃: and 8h, then sending the bagasse into a high-concentration pulping machine for defibering and cutting to obtain bagasse pulp, wherein the beating degree of the bagasse pulp is as follows: and (3) SR, feeding the bagasse pulp into a pulp washer for washing, recovering the washing liquid of the washed bagasse pulp fed into the pulp washer into a pre-soaking pool for soaking bagasse, carrying out devillicating and brooming on the bagasse pulp through an ultrasonic reactor, and dehydrating and concentrating the bagasse pulp through a rotary screen farm compressor to obtain a coarse pulp finished product.

Example 3

This example provides a process for making bagasse pulp comprising the steps of:

storing and fermenting bagasse for the following time: 2.7 months, the fermentation temperature is as follows: washing with water at 30 ℃ by using impurity removal equipment to remove impurities, soaking bagasse in a pre-soaking pool, wherein the amount of water is larger than that of the bagasse in the pre-soaking pool, and adding sodium hydroxide into the water, wherein the concentration of the sodium hydroxide in the water is as follows: 2 percent, adding water vapor when bagasse is soaked in a pre-soaking tank, wherein the soaking temperature is as follows: the soaking time is as follows at 38 ℃: and 9h, then sending the bagasse into a high-concentration pulping machine for defibering and cutting to obtain bagasse pulp, wherein the beating degree of the bagasse pulp is as follows: and (3) 23.5 DEG SR, feeding the bagasse pulp into a pulp washer for washing, recovering washing liquid obtained after the bagasse pulp is fed into the pulp washer for washing bagasse into a pre-soaking pool for soaking the bagasse, carrying out devillicating and brooming on the bagasse pulp through an ultrasonic reactor, and then dehydrating and concentrating the bagasse pulp through a rotary screen farm compressor to obtain a coarse pulp finished product.

Example 4

This example provides a process for making bagasse pulp comprising the steps of:

storing and fermenting bagasse for the following time: 3.5 months, the fermentation temperature is as follows: washing with water at 23 ℃ by using impurity removal equipment to remove impurities, soaking bagasse in a pre-soaking pool, wherein the amount of water is larger than that of the bagasse in the pre-soaking pool, and adding sodium hydroxide into the water, wherein the concentration of the sodium hydroxide in the water is as follows: 4 percent, adding water vapor when bagasse is soaked in a pre-soaking tank, wherein the soaking temperature is as follows: the soaking time is as follows at 39 ℃: and (3) 8-12h, then, sending the bagasse into a high-concentration pulping machine for defibering and cutting to obtain bagasse pulp, wherein the beating degree of the bagasse pulp is as follows: and (2) SR, feeding the bagasse pulp into a pulp washer for washing, recovering the washing liquid of the washed bagasse pulp fed into the pulp washer into a pre-soaking pool for soaking bagasse, carrying out devillicating and brooming on the bagasse pulp through an ultrasonic reactor, and dehydrating and concentrating the bagasse pulp through a rotary screen farm compressor to obtain a coarse pulp finished product.

Example 5

This example provides a process for making bagasse pulp comprising the steps of:

storing and fermenting bagasse for the following time: 3.2 months, the fermentation temperature is as follows: washing with water at 32 ℃ by using impurity removal equipment to remove impurities, then soaking bagasse in a pre-soaking pool, wherein the using amount of water is larger than that of the bagasse in the pre-soaking pool, and sodium hydroxide is added into the water, and the concentration of the sodium hydroxide in the water is as follows: 4 percent, adding water vapor when bagasse is soaked in a pre-soaking tank, wherein the soaking temperature is as follows: the soaking time is as follows at 36 ℃: and (3) feeding the bagasse into a high-concentration pulping machine for defibering and cutting to obtain bagasse pulp, wherein the beating degree of the bagasse pulp is as follows: and (2) 25 DEG SR, feeding the bagasse pulp into a pulp washer for washing, recovering the washing liquid of the washed bagasse pulp fed into the pulp washer into a pre-soaking pool for soaking bagasse, carrying out devillicating and brooming on the bagasse pulp through an ultrasonic reactor, and then dehydrating and concentrating the bagasse pulp through a rotary screen farm compressor to obtain a coarse pulp finished product.

The paper pulp prepared in examples 1 to 5 was tested, and each test data is shown in table 1.

TABLE 1

Name (R)	Concentration%	Degree of percussion SR	Wet weight	Whiteness degree	pH value
						Example 1	2.8	22	2.9	40.5	6.8
Example 2	2.65	23	3.0	40.9	7.1
						Example 3	2.5	23.5	2.8	40.8	6.5
Example 4	2.75	26	3.1	41	7.0
						Example 5	3.0	25	2.96	41.2	7.2

As can be seen from Table 1, the paper pulp prepared in examples 1-5 has proper wet weight, good whiteness and moderate pH value.

The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.