CN112048930A

CN112048930A - Pulping and papermaking process using ginger seedling as raw material and ultrahigh-concentration continuous pulping machine

Info

Publication number: CN112048930A
Application number: CN202010963927.0A
Authority: CN
Inventors: 郑宗刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2020-12-08

Abstract

The invention discloses a pulping and papermaking process taking ginger seedlings as raw materials and an ultrahigh-concentration continuous beater, and relates to the technical field of biological pulping and papermaking. The method takes ginger seedlings as raw materials, the ginger seedlings are crushed and dedusted, fiber degradation and devillicate are carried out, then an ultra-high concentration continuous beater is used for carrying out continuous beating operation for two times, qualified paper pulp is obtained, white paper pulp is obtained after the qualified paper pulp is dewatered and bleached, and paper making operation is carried out on the white paper pulp to obtain finished paper. The invention adopts the fiber degradation tank to replace large-scale cooking equipment, uses the ultra-high concentration continuous beater, has simple process and few mechanical machines, and can realize continuous production and automatic control. The mechanical power consumption is low, and the operation is stable and safe; the pulping black liquor flows back to the fiber degradation tank for secondary use, so that no environmental pollution is caused; the whole process flow only needs to be diluted and washed by adding water twice, and the highest concentration can reach 20% during pulping; compared with the rice and wheat straw pulping, the cost of the whole process is reduced by 40 percent.

Description

Pulping and papermaking process using ginger seedling as raw material and ultrahigh-concentration continuous pulping machine

Technical Field

The invention relates to the technical field of pulping and papermaking, in particular to a pulping and papermaking process taking ginger seedlings as raw materials and an ultrahigh-concentration continuous beater.

Background

At present, raw materials used for pulping and papermaking in China mainly comprise herbaceous plants such as wheat straws, sugar canes and reeds or woody plants such as woods, and due to the shortage of forest resources and the large reserves of herbaceous plant resources, the pulping and papermaking by utilizing the herbaceous plants become popular researches.

With the attention of environmental protection, the waste crop seedling stems cannot be discarded at will or burnt on site, the waste crops are used for pulping and papermaking, the process is complex, the equipment is huge, and the water consumption is about 300 times of that of oven-dry pulp. The chemical pulping method is used for treating crop seedling stems to generate a large amount of papermaking black liquor, so that the serious environmental pollution is caused. Most of the prior pulping machines for the grass wood pulp are intermittent pulping and sectional pulping processes, the operation concentration of a common pulping machine is about 5 percent, the concentration is ultrahigh when the concentration exceeds 10 percent, and when the pulping operation mass concentration exceeds 10 percent, the pulping machine is easy to block and cannot normally operate. The pulping and papermaking process flow using the common beater has the advantages of multiple devices, complex process, complex maintenance, high investment cost, low production efficiency and overlarge power consumption.

Disclosure of Invention

In order to solve the technical problems, the invention provides a pulping and papermaking process taking ginger seedlings as raw materials and an ultrahigh-concentration continuous beater, which have the advantages of no environmental pollution, low water consumption, less equipment, less power consumption, simple process and continuous production.

In order to realize the technical purpose, the method adopts the following scheme: a pulping and papermaking process taking ginger seedlings as raw materials comprises the following steps:

(1) preparing materials: crushing, dedusting and cutting ginger seedlings into coarse fibers with the length of 8-12 mm, and storing the coarse fibers;

(2) fiber degradation: putting the crude fiber into a fiber degradation pool, soaking for more than 3 hours, putting a biological pulping auxiliary agent and a deodorant into the fiber degradation pool, wherein the liquid temperature of the fiber degradation pool is more than 30 ℃, and the water content in the pool is 4-5 times of the weight of dry matters;

(3) fiber dividing: extracting the crude fiber in the fiber degradation pool, putting the crude fiber into a fiber storage pool, adjusting the mass concentration to 5-20%, extracting the crude fiber in the storage pool by using a screw feeder, and realizing the purposes of softening, splitting and softening in the extraction process;

(4) pulping: directly conveying the crude fiber extracted from the storage tank into an ultrahigh-concentration continuous pulping machine for primary pulping operation, wherein the mass concentration of the primary pulping operation is 5-20%; qualified pulp flows into a first pulp storage tank, separated crude fibers enter a second ultrahigh-concentration continuous pulping machine for second pulping operation, and the mass concentration of the second pulping operation is 12-14%; qualified slurry flows into the first slurry storage tank, and the separated crude fiber is returned to the fiber degradation tank for degradation again;

(5) and (3) dehydrating: extracting qualified paper pulp in the first pulp storage tank by using a solid-liquid separator, dehydrating, and feeding the dehydrated paper pulp to a cleaning conveyor for cleaning; adding the cleaned paper pulp into a second pulp storage tank, adding water for dilution, dehydrating pulp in the second pulp storage tank by using a solid-liquid separator, wherein semi-dry wet paper pulp is the natural-color finished paper pulp, the pH of the finished paper pulp is neutral, and liquid generated by dehydration reflows to a fiber degradation tank for secondary utilization;

(6) bleaching: conveying finished product natural color paper pulp into a third pulp storage tank of a bleaching workshop, adding water for dilution through a stirrer, adding a paper pulp bleaching auxiliary agent at the same time, extracting by using a pulp pump, putting into a common beater for beating, and obtaining white paper pulp after beating, wherein the absolute dry pulp yield of the white paper pulp is more than 80%;

(7) papermaking: spraying white paper pulp onto the papermaking net cage by a pulp spraying machine to form a controllable wet paper sheet, and squeezing and drying the wet paper sheet to manufacture finished paper.

Compared with the prior art, the method has the beneficial effects that: the ginger seedlings with single lignin structure are used as raw materials, so that paper pulp fibers are easier to obtain; the fiber degradation tank is adopted to replace large-scale cooking equipment, so that the amount of generated black liquor is small, the mechanical noise is reduced, and the potential safety hazard of mechanical operation is reduced; the pulping black liquor is refluxed to a fiber degradation tank for secondary use, so that the environmental pollution is reduced; the whole process flow adopts the ultrahigh-concentration continuous beater to carry out continuous beating only twice, and the highest mass concentration during beating is 20 percent, so that compared with the beating mass concentration of 5 percent in the prior art, the water consumption of the process flow is greatly reduced, and the production cost is saved; the continuous pulping machine with ultra-high concentration is used, the number of equipment is small, the process is simple, the continuity of the process flow is realized, and the production efficiency is improved.

The preferred scheme of the invention is as follows:

the dosage of the biological pulping aid is 4-6 kg of biological pulping aid added into 1 ton of pulp liquid; the dosage of the deodorant is 2.5kg of deodorant added into 1 ton of pulp.

And separating black liquor during the second cycle of pulping operation by recycling the second degradation liquid, directly conveying the black liquor to a black liquor treatment workshop, and treating the black liquor by using crushed waste materials.

The waste material of the black liquor after drying is mixed and absorbed for a plurality of times to prepare biomass particles, or the biomass particles are put into a gas producer to produce regenerated gas, or a fermentation method is used to produce biomass organic fertilizer.

The water consumption in the production process of 1 ton of absolutely dry paper pulp is lower than 12 tons, and the water consumption from the stock preparation to white finished paper is not more than 30 tons.

In order to realize the technical purpose, the device adopts the following scheme: the ultra-high concentration continuous beater comprises a feeding funnel, a pulp outlet, a fiber outlet and a motor, wherein the bottom of the feeding funnel is connected with a grinding bin, the grinding bin is of an inverted cone structure, a rotating shaft is arranged at the symmetrical center of the grinding bin, a grinding wheel and a kick-out device are fixed on the rotating shaft, and the rotating shaft is connected with the output end of the motor; a conical screen is arranged in the grinding bin, the upper port of the conical screen is a free end, and the lower port of the conical screen is fixed on the rotating shaft; a pulp scraping brush is arranged in the grinding bin, the pulp scraping brush is parallel to the net surface of the conical screen, and a cleaning water nozzle is arranged at the upper end of the pulp scraping brush; the upper end of the grinding bin is provided with a fiber outlet; the lower part of the grinding bin is provided with a pulp outlet.

Compared with the prior art, the device has the beneficial effects that: the rotatable toper screen cloth is add to super high concentration continuous beating machine in grinding the storehouse, is equipped with fixed thick liquid brush of scraping on the wire side for thick fibre is difficult for blockking up the screen cloth, washs the water injection well choke simultaneously and washs the residual fibre of scraping on the thick liquid brush, has improved making beating operation concentration, increase equipment handling capacity, using water wisely reduces the energy consumption.

The preferred scheme of the device of the invention is as follows:

the conical screen is made of wear-resistant and corrosion-resistant materials, and the slurry scraping brush is made of wear-resistant steel.

The upper end face of the grinding bin is provided with a sealing cover, and the pulp scraping brush is connected with the sealing cover through a connecting rod.

The grinding bin and the motor are arranged on the bracket or the shell.

Drawings

FIG. 1 is a flow chart of a pulping and papermaking process using ginger seedlings as raw materials according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the internal structure of an ultra-high consistency continuous beater according to an embodiment of the present invention;

labeled as: pan feeding funnel 1, pivot 2, grout outlet 3, grind storehouse 4, toper screen cloth 41, scrape thick liquid brush 42, washing water injection well choke 43, fibre export 44, setting gauge 45, grinding wheel 46, motor 5, support 6.

Detailed Description

The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention, but the present invention is not limited thereto.

Referring to fig. 1, the pulping and papermaking process using ginger seedling as raw material provided by the present invention comprises the following steps:

(1) preparing materials: crushing ginger seedlings by a crusher to obtain coarse fibers with the length of 8-12 mm, screening sand dust and fine impurities by a screening machine with 5mm sieve pores, putting the coarse fibers subjected to dust removal into a fiber degradation tank, and conveying the screened waste materials to a black liquor treatment workshop. The length is 10mm, the devillicate rate is more than 45 percent, and the coarse fiber with the water content of less than 15 percent is the preferred material.

(2) Softening the fibers: and (3) putting the crude fiber into a fiber degradation pool, soaking for more than 3 hours, and adding a biological pulping auxiliary agent and a deodorant into the fiber degradation pool. The dosage of the agent is 4-6 kg of biological pulping auxiliary agent and 2.5kg of deodorant in every 1 ton of pulp. The deodorizer is preferably a biological deodorizer. When no biological additive is used and only a deodorant is added, 10-15 days are needed in the degradation process. The temperature of the liquid in the fiber degradation tank is above 30 ℃, and the water content in the tank is 4-5 times of the weight of dry matters. According to the traditional cooking equipment, the water consumption is 7.14 times of the weight of dry matters, the cooking time is more than 24 hours, black liquor which is about 7 times of the weight of the dry matters is generated to be treated, a fiber degradation tank is adopted to replace the traditional large cooking equipment, the cost is reduced, the mechanical noise is reduced, and no potential safety hazard is caused when the machine runs; the invention adopts the fiber degradation tank to reduce the water consumption and the black liquor generation amount.

(3) Fiber dividing: the pulp in the fiber degradation pool is conveyed to a fiber storage pool, the mass concentration of the pulp is adjusted to be between 5% and 20%, the pulp is extracted by a screw feeder, partial fiber separation can be realized in the pulp extraction process, and large-scale fiber separation and concentration equipment in the traditional process is eliminated. Compared with the rice and wheat straw, the ginger seedlings have single lignin structure, paper pulp fibers are easy to obtain, and the products of the rice and wheat straw obtained in the same degradation environment cannot be divided by a screw feeder, so that additional equipment is required to be invested for dividing the filaments, and the production cost is increased.

(4) Pulping: and (3) putting the pulp extracted by the fiber storage tank into a first ultrahigh-concentration continuous beater, controlling the mass concentration to be below 20% during pulp extraction, automatically separating pulp residues by the ultrahigh-concentration continuous beater, and screening qualified paper pulp, wherein the mass concentration of the first beating operation is 5% -20%. Qualified paper pulp flows into the first pulp storage tank, the coarse pulp is put into the second ultrahigh-concentration continuous beater, beating, screening and pulp-residue separation are carried out again, the quality concentration of the second beating operation is 12% -14%, the qualified paper pulp flows into the first pulp storage tank, and the unqualified coarse pulp is returned to the fiber degradation tank for secondary degradation. The whole pulping process comprises the following steps: the system comprises two ultrahigh-concentration continuous beaters, two solid-liquid separators, a spare non-clogging slurry pump, a spare non-clogging pulp pump, a screw feeder, a crusher and a screening machine. When 10 ten thousand tons are produced every year, vehicles and loaders need to be added.

(5) And (3) dehydrating: extracting qualified paper pulp in a finished product pulp tank, performing primary dehydration by using a solid-liquid separator, and putting the dehydrated paper pulp into a conveyor for washing; putting the washed paper pulp into a second liquid storage tank, and performing secondary dehydration treatment by using a solid-liquid separator, wherein the dehydrated paper pulp is the natural-color semi-dry wet finished paper pulp; the pH value of the finished paper pulp is neutral; and the black liquor generated by dehydration flows back to the fiber degradation pool for secondary utilization.

And (3) extracting black liquor by using the degradation liquid twice through a solid-liquid separator during the second cycle operation of the pulping process, and conveying the extracted black liquor to a black liquor treatment workshop for treatment. The processing method comprises the following steps: the rejected waste after dust removal by sieving (volume weight 230 kg/m)³) The waste material is screened out fine plant particles, impurities and the like, or fiber-free plants can be crushed and used as black liquor for treatment, and the water content of the mixed material is controlled below 80%. And drying the wet materials after being mixed and stirred, and repeatedly stirring and mixing the dried materials with the night. The volume weight of the waste material after absorbing black liquor reaches 550kg/m³When in use, the waste material is dried to prepare biomass particles, or is directly put into a gas generating furnace to generate regenerated gas for use in life, and the gas generating furnace adopts a straw gasification furnace or a gas generating furnace. The black liquor produced by the chemical pulping method can be treated by the method, and when the black liquor produced by the chemical pulping is treated, the gasification furnace needs to adopt a water-sealed rotary furnace to obtain high-concentration alkali liquor, and no alkali recovery equipment or additives such as calcium hydroxide and the like need to be added.

(6) Bleaching: and (3) putting the finished pulp into a stirrer, adding water for dilution, controlling the mass concentration to be 5-10%, and adding a pulp bleaching auxiliary agent, preferably an FAS bleaching agent. After being extracted by a non-clogging paper pulp pump, the pulp is put into a common pulping machine for pulping, and then white paper pulp can be obtained. The white paper pulp obtained by the ginger seedling pulping is dried completely to obtain the pulp yield of more than 80 percent. The bleaching process is a repeated pulping process, a bleaching tower and washing equipment are not needed, and bleaching water is used as pulping dilution water or is refluxed into a fiber degradation pool for repeated utilization.

(7) Papermaking: the invention cancels the pulp distribution function and the head box of the sizing pool on the basis of the prior paper machine. Spraying the bleached paper pulp onto a papermaking net cage by a pulp sprayer to form a controllable wet paper sheet, and performing procedures such as squeezing and drying on the wet paper sheet to manufacture finished paper.

In the pulping and papermaking process provided by the invention, the water consumption in the production process of 1 ton of oven dry paper pulp is lower than 12 tons, and the water consumption from the stock preparation to white finished paper is not more than 30 tons.

The pulp-spraying papermaking method can realize intelligent control of papermaking operation, and effectively control the thickness and uniformity of paper pulp, the width of paper web, the loss of paper pulp, the loss of auxiliary materials, the yield of white water and the like. And the traditional papermaking process is in a semi-controllable state.

(8) And (3) finished product: warehousing and storage of finished products are the same as those of the traditional method.

Example one

The biological pulping auxiliary agent can be selected from fiber softener (fiber softener is purchased chemical), 5kg of biological pulping auxiliary agent is added into 1 ton of pulp, the deodorant is selected from biological deodorant (biological deodorant is purchased chemical), and 2.5kg of deodorant is added into 1 ton of pulp. The water amount in the tank is 4 times of the weight of dry matters, the temperature of the degradation tank is 30 ℃, the degradation time is 3 hours, the mass concentration of pulp in the fiber storage tank is 17 percent, the mass concentration of the first pulping operation is 20 percent, the mass concentration of the second pulping operation is 12 percent, and the mass concentration of the bleaching operation is 10 percent. The bleaching auxiliary agent is FAS bleaching agent, the dosage is 1 ton oven dry pulp is added into 4kg, and the oven dry pulp yield is 85%.

Example two

The biological pulping auxiliary agent is white rot fungus preparation, 1kg of biological pulping auxiliary agent is added into 1 ton of pulp, the deodorant is biological deodorant, and 2.5kg of deodorant is added into 1 ton of pulp. The water amount in the tank is 4 times of the weight of dry matters, the temperature of the degradation tank is 35 ℃, the degradation time is 6 hours, the mass concentration of pulp in the fiber storage tank is 18 percent, the mass concentration of the first pulping operation is 15 percent, the mass concentration of the second pulping operation is 13 percent, the mass concentration of the bleaching operation is 10 percent, an FAS bleaching agent is selected as a bleaching auxiliary agent, 4kg of 1 ton of oven-dry pulp is added, and the oven-dry pulp yield is 83 percent finally obtained.

EXAMPLE III

Biological deodorant is selected without adding biological pulping auxiliary agent, and 2.5kg of deodorant is added into 1 ton of pulp. The water amount in the tank is 4 times of the weight of dry matters, the temperature of the degradation tank is 40-80 ℃, and the degradation time is 10-15 days. The mass concentration of the pulp in the storage tank is controlled to be 20%, the mass concentration of the first pulping operation is 18%, the mass concentration of the second pulping operation is 14%, the mass concentration of the bleaching operation is 10%, an FAS bleaching agent is selected as a bleaching auxiliary agent, 4kg of the absolute dry pulp is added by 1 ton of the absolute dry pulp, and the absolute dry pulp yield is 83% finally.

Comparative example

The method comprises the steps of taking rice and wheat straws as raw materials, performing a pulping and papermaking process by adopting a chemical pulping method, cooking crushed rice and wheat straws, screening abrasive materials after cooking and softening, repeatedly washing the obtained pulp to reduce the mass concentration to 5%, adding an FAS bleaching agent with the dosage of 1 ton pulp to 6kg, and obtaining the oven-dry pulp yield of 81%.

The quality parameters of the finished papers obtained in the examples and comparative examples are shown in the following table

Name (R)	Example one	Example two	EXAMPLE III	Comparative example
					Quantitative ratio/g.m^-2	13.3	13.8	12.7	13
Whiteness/%	78	76	83	81
					Tensile index/(N.m). g^-1	5.2	4.9	4.3	5.1
softness/mN	62	70	82	67

The data in the comparison table show that the finished paper obtained by the pulping and papermaking process taking ginger seedlings as raw materials has the quality similar to that obtained by the chemical pulping method of rice and wheat straws, but the water consumption in the process flow is reduced by 10 times, the cooking equipment is reduced, the whole pulping process comprises two ultrahigh-concentration continuous pulping machines, two solid-liquid separators, one non-clogging slurry pump, one non-clogging pulp pump, one screw feeder, one pulverizer and one sieving machine, so that the equipment investment and the power consumption are reduced, and the cost of each ton of dry pulp is reduced by 40% when the power consumption of each ton of dry pulp is 11 kilowatts. The black liquor is treated by waste materials, no extra agent or equipment is needed, the waste materials of the black liquor are absorbed to produce fuel gas, organic waste materials or biomass particles, the whole process flow is environment-friendly, and pollutant discharge is reduced.

Referring to fig. 2, an ultra-high concentration continuous beater for paper pulp and paper making process using ginger seedling as raw material comprises a feeding funnel 1, a pulp outlet 3, a fiber outlet 44 and a motor 5, wherein the bottom of the feeding funnel 1 is connected with a grinding bin 4, the grinding bin 4 is in an inverted cone structure, a rotating shaft 2 is arranged at the symmetrical center of the grinding bin 4, a grinding wheel 46 and a kick-out device 45 are fixed on the rotating shaft 2, and the bottom of the rotating shaft 2 is connected with the output end of the motor 5; a conical screen mesh 41 is arranged in the grinding bin 4, the upper end of the conical screen mesh 41 is a free end, and the lower port of the conical screen mesh 41 is fixed on the rotating shaft 2; a pulp scraping brush 42 is arranged in the grinding bin 4, the pulp scraping brush 42 is arranged in parallel to the net surface of the conical screen 41, and the upper end of the pulp scraping brush 42 is provided with a cleaning water nozzle 43; the upper end of the grinding bin 4 is provided with a fiber outlet 44; the lower part of the grinding bin 4 is provided with a pulp outlet 3. The upper end surface of the grinding bin 4 is provided with a sealing cover, and the pulp scraping brush 42 is connected with the sealing cover through a connecting rod. The grinding silo 4 and the motor 5 are mounted on a stand or housing 6.

The conical screen 41 is made of wear-resistant and corrosion-resistant materials, preferably a conical steel plate screen, and the diameter of the mesh is changed according to the requirements of paper pulp. The net surface of the conical steel plate screen is provided with a pulp scraping brush 42 made of wear-resistant steel, and the upper part of the pulp scraping brush 42 is provided with a high-pressure cleaning water nozzle 43 for periodically cleaning the pulp scraping brush 42. The distance between the scraping brush 42 and the conical steel plate screen is adjusted according to the production requirements of the pulp. The cleaning water nozzle 43 and the pulp scraping brush 42 are fixed in the grinding bin 4 and still, and the conical steel plate screen rotates along with the rotating shaft 2 under the driving of the motor 5.

The working process of the ultra-high concentration continuous beater comprises the following steps: coarse fiber pulp with the mass concentration of less than 20% is fed into an ultrahigh-concentration continuous pulping machine from a feeding funnel 1 of the continuous pulping machine, pulp is scraped into a grinding bin 4 by a kickoff 45, and the coarse fiber pulp is continuously ground by the flying rotation of a grinding wheel 46 under the drive of a rotating shaft 2. Under the action of centrifugal force and a kickoff 45, coarse fibers are separated onto the conical screen 41, and the coarse fibers which are not ground into pulp are separated from the conical screen 41 by a scraping brush 42 and discharged from a fiber outlet 44. Qualified pulp flows out from the bottom of the conical screen 41 through the pulp outlet 3.

Two ultrahigh-concentration continuous beaters are used in the pulping and papermaking process flow taking ginger seedlings as raw materials, coarse fiber pulp flowing out of a fiber outlet 44 of a first ultrahigh-concentration continuous beater enters a second ultrahigh-concentration continuous beater to carry out beating operation again, qualified pulp of the first ultrahigh-concentration continuous beater and qualified pulp of the second ultrahigh-concentration continuous beater respectively flow into a first liquid storage tank, and unqualified pulp obtained by the second ultrahigh-concentration continuous beater is sent into a fiber degradation tank to be degraded again. The crude fiber is continuously pulped twice, the absolute dry pulp yield of the first pulping operation is 30 percent, the absolute dry pulp yield of the second pulping operation is more than 50 percent, and the absolute dry pulp yield of unbleached pulp of the whole pulping process is more than 80 percent.

Finally, it is noted that: the above-mentioned list is only the preferred embodiment of the present invention, and naturally those skilled in the art can make modifications and variations to the present invention, which should be considered as the protection scope of the present invention provided they are within the scope of the claims of the present invention and their equivalents.

Claims

1. A pulping and papermaking process taking ginger seedlings as raw materials is characterized by comprising the following steps:

(3) fiber dividing: extracting the crude fiber in the fiber degradation pool, putting the crude fiber into a fiber storage pool, adjusting the mass concentration of the crude fiber to 5-20%, extracting the crude fiber in the storage pool by using a screw feeder, and realizing the aims of partial softening, splitting and softening in the extraction process;

(4) pulping: directly conveying the crude fibers extracted from the storage tank into an ultrahigh-concentration continuous pulping machine for primary pulping operation, wherein the mass concentration of the primary pulping operation is 5-20%; qualified pulp flows into the first pulp storage tank, and separated crude fibers enter a second ultrahigh-concentration continuous pulping machine for second pulping operation, wherein the mass concentration of the second pulping operation is 12-14%; qualified slurry flows into a first slurry storage tank, and the separated crude fiber is returned to a fiber degradation tank for degradation again;

(5) and (3) dehydrating: extracting qualified paper pulp in the first pulp storage tank by using a solid-liquid separator, dehydrating, and feeding the dehydrated paper pulp to a cleaning conveyor for cleaning; diluting the cleaned paper pulp in a second pulp storage tank, dehydrating the pulp in the second pulp storage tank by using a solid-liquid separator, wherein semi-dry wet paper pulp is the natural-color finished paper pulp, the pH of the finished paper pulp is neutral, and liquid generated by dehydration reflows to a fiber degradation tank for secondary utilization;

(6) bleaching: conveying finished product natural color paper pulp into a third pulp storage tank of a bleaching workshop, stirring by a stirrer, adding water for dilution, adjusting the concentration to be between 5 and 10 percent, simultaneously adding a paper pulp bleaching auxiliary agent, extracting by a paper pulp pump, putting into a common beater for beating, and obtaining white paper pulp after beating, wherein the absolute dry pulp yield of the white paper pulp is over 80 percent;

2. The pulping and papermaking process with ginger seedlings as raw materials according to claim 1, characterized in that 4-6 kg of biological pulping aid is added into 1 ton of pulp liquid; the dosage of the deodorant is 2.5kg of deodorant added into 1 ton of pulp.

3. A pulping and papermaking process using ginger vine as raw material according to claim 1, characterized in that the second degradation liquid is recycled to separate the black liquor in the second cycle of the pulping operation, the black liquor is directly transported to a black liquor treatment plant, the black liquor is transported to a black liquor treatment plant, and the black liquor is treated with the crushed waste.

4. A pulping and papermaking process using ginger seedlings as raw materials according to claim 3, characterized in that waste materials obtained by drying black liquor are mixed and absorbed for a plurality of times to prepare biomass particles, or the biomass particles are put into a gas generating furnace to produce regenerated gas, or a fermentation method is used to produce biomass organic fertilizers.

5. The pulping and papermaking process using ginger seedlings as raw materials according to claim 1, characterized in that the water consumption in the production process of 1 ton of absolutely dry paper pulp is lower than 12 tons, and the water consumption from the stock preparation to white finished paper is not more than 30 tons.

6. An ultra-high concentration continuous beater used in pulping and papermaking process taking ginger seedlings as raw materials according to any one of claims 1 to 5, which comprises a feeding funnel, a pulp outlet, a fiber outlet and a motor, and is characterized in that the bottom of the feeding funnel is connected with a grinding bin, the grinding bin is of an inverted cone structure, the symmetrical center of the grinding bin is provided with a rotating shaft, a grinding wheel and a kick-out device are fixed on the rotating shaft, and the rotating shaft is connected with the output end of the motor; a conical screen is arranged in the grinding bin, the upper port of the conical screen is a free end, and the lower port of the conical screen is fixed on the rotating shaft; a pulp scraping brush is arranged in the grinding bin, the pulp scraping brush is parallel to the net surface of the conical screen, and a cleaning water nozzle is arranged at the upper end of the pulp scraping brush; the upper end of the grinding bin is provided with a fiber outlet, and the lower part of the grinding bin is provided with a pulp outlet.

7. The ultra-high consistency continuous beater of claim 6, wherein the conical screen is made of a wear resistant and corrosion resistant material; the slurry scraping brush is made of wear-resistant steel.

8. The ultra-high consistency continuous beater according to claim 6, wherein the grinding chamber has a cover at an upper end thereof, and the scraping brush is connected to the cover by a connecting rod.

9. The ultra-high consistency continuous beater of claim 6, wherein the grinding bin and the motor are mounted on a bracket or housing.