WO2020181885A1 - Pulping method for household paper - Google Patents

Pulping method for household paper Download PDF

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Publication number
WO2020181885A1
WO2020181885A1 PCT/CN2019/129643 CN2019129643W WO2020181885A1 WO 2020181885 A1 WO2020181885 A1 WO 2020181885A1 CN 2019129643 W CN2019129643 W CN 2019129643W WO 2020181885 A1 WO2020181885 A1 WO 2020181885A1
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Prior art keywords
pulping
pulper
water pump
white water
operating frequency
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PCT/CN2019/129643
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French (fr)
Chinese (zh)
Inventor
李六柏
廖昌吕
杨玉军
高旭东
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浙江景兴纸业股份有限公司
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Publication of WO2020181885A1 publication Critical patent/WO2020181885A1/en

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C7/00—Digesters

Definitions

  • the invention relates to a pulping method for household paper.
  • the purpose of the present invention is to provide a pulping method for household paper, and solve the problem of waste of electric energy caused by the existing pulping process.
  • a method for pulping household paper including a pulping system, the pulping system including a pulper, a white water pump, a roller conveyor, and a chain Plate conveyor and pulping discharge pump, the pulping method includes the following steps in sequence:
  • Step 1 Add water: add water to the pulper through a white water pump.
  • the operating frequency of the white water pump is 50-60HZ, and the time for adding water is 1 ⁇ 2min, and the operating frequency of the pulper is 15-20HZ;
  • Step 2 Feeding: The wood pulp is transported to the pulper after adding water through the roller conveyor and the chain conveyor.
  • the feeding time is 1 to 2 minutes, and the operating frequency of the white water pump is 50 to 60HZ.
  • the operating frequency of the pulper is 35 ⁇ 40HZ;
  • Step 3 Pulping: Use a pulper to decompose and break the wood pulp after feeding into a slurry.
  • the operating frequency of the white water pump is 5-10HZ, the operating frequency of the pulper is 50-55HZ, and the pulper The working time is 7-9min;
  • Step 4 Pumping: The slurry after beating in step 3 is quickly pumped away by the pulping discharge pump.
  • the operating frequency of the white water pump is 20-25HZ
  • the operating frequency of the pulper is 20-25HZ
  • the pulp is discharged
  • the working time of the feed pump is 90 ⁇ 120S;
  • Step 5 Cleaning: Use a white water pump to add water to the pulper processed in step 4 for cleaning.
  • the operating frequency of the white water pump is 35-40HZ
  • the operating frequency of the pulper is 20-25HZ
  • the cleaning time of the pulper For 20 to 40S.
  • the pulping system further includes a frequency converter, and both the pulper and the white water pump are equipped with a frequency converter.
  • a DCS control system is connected to the frequency conversion speed regulator.
  • the advantages of the present invention are adopted. Since the white water pump is the working stage in the water adding section, the breaker is the non-working stage. Therefore, the white water pump is set to run at high speed in the water processing section, and the breaker runs at low speed.
  • the breaker in the pulping section is the power stage, and the white water pump is the non-power stage. Therefore, the white water pump is set to run at low speed and the breaker runs at high speed.
  • the white water pump and the pulper in the pulping section are both in the non-working stage, so the white water pump and the pulper are set to operate at low speeds.
  • the high-speed operation of the existing white water pump and pulper equipment has the phenomenon of waste of electricity, which saves production costs.
  • the power consumption of the pulping system per ton of paper is reduced by 40%.
  • the power consumption of the pulper is reduced by 25%. Power consumption decreased by 79%.
  • wood pulp has long-fiber wood pulp and short-fiber wood pulp, long-fiber wood pulp is difficult to disintegrate compared to short fiber. Therefore, the working time of setting a pulper in the beating process is 7-9 minutes , So that the pulp quality in the beating process meets the production process;
  • the feeding stage is the wood pulp feeding stage, it is set between water adding and beating, and the operating frequency of the white water pump in the feeding stage is 50-60HZ, and the operating frequency of the pulper is 35-40HZ, which can ensure In the material stage, the wood pulp can be decomposed preliminarily to improve the efficiency of beating and the quality of the pulp.
  • the cleaning stage is to clean the pulper and prepare the foundation for the next pulping cycle, which greatly saves the overall pulping. effectiveness;
  • the frequency converter can adjust the speed of the pulper and the white water pump separately, and the speed switching effect is good, which can ensure the smooth operation of the pulper and the white water pump;
  • the DCS control system realizes the fully automatic control of the frequency converter. The whole process does not require manual adjustment of the operating frequency. It can quickly realize the automatic change of the operating frequency in different stages of the pulping process, and further improve the production efficiency.
  • a method for pulping household paper including a pulping system.
  • the pulping system includes a pulper, a white water pump, a roller conveyor, a chain conveyor, and a pulping discharge pump.
  • the pulping method in turn It includes the following steps:
  • Step 1 Add water: add water to the pulper through a white water pump.
  • the operating frequency of the white water pump is 50HZ, and the time for adding water is 2min, and the operating frequency of the pulper is 15HZ;
  • Step 2 Feeding: The wood pulp is transported to the pulper after adding water in step 1 through the roller conveyor and chain conveyor.
  • the feeding time is 1 min
  • the operating frequency of the white water pump is 50HZ
  • the pulper's Operating frequency is 35HZ
  • Step 3 Pulping: Use a pulper to decompose and disperse the wood pulp after feeding into a slurry.
  • the operating frequency of the white water pump is 5HZ
  • the operating frequency of the pulper is 50HZ
  • the working time of the pulper is 7 ⁇ 9min;
  • Step 4 Slurry pumping: The slurry after beating in step 3 is quickly pumped away by the slurry unloading pump.
  • the operating frequency of the white water pump is 25HZ
  • the operating frequency of the pulper is 25HZ
  • the operation of the slurry unloading pump The time is 120S;
  • Step 5 Cleaning: Use a white water pump to add water to the pulper processed in step 4 for cleaning.
  • the operating frequency of the white water pump is 35HZ
  • the operating frequency of the pulper is 20HZ
  • the cleaning time of the pulper is 20-40S .
  • the pulping method of adding water, feeding, beating, pumping and cleaning is adopted. Since the white water pump is in the working stage in the water adding section and the breaker is in the non-working stage, the white water pump is set to operate at high speed in the water adding section. And the breaker runs at low speed, the breaker in the pulping section is the working stage, and the white water pump is the non-working stage, so the white water pump is set to run at low speed, and the breaker runs at high speed. Both the white water pump and the breaker in the pumping section are In the non-working stage, both the white water pump and the pulper are set to operate at low speed.
  • the power consumption per ton of paper in the pulping system is reduced by 40%, among which the power consumption of the pulper is reduced by 25%, and the power consumption of the pulping white water pump is reduced by 79%.
  • the unit electricity consumption of the pulping system is 22.6 kWh/ton of paper, while the pulping method of the present invention consumes 12.5 kWh of electricity/ton of paper; the unit of pulping consumption is reduced by 10.1 kWh/ton of paper, and the output per unit is 3
  • the feeding stage is the wood pulp feeding stage, it is set between water adding and beating, and the operating frequency of the white water pump in the feeding stage is 50-60HZ, and the operating frequency of the pulper is 35-40HZ, which can ensure the feeding stage Zhongmu pulp can carry out preliminary decomposition, improve the efficiency of beating, and improve the quality of the pulp.
  • the cleaning stage is to clean the pulper and prepare the foundation for the next pulping cycle, which greatly saves the overall pulping efficiency; And set the operating frequency of the breaker to 15-20HZ, 35-40HZ, 50-55HZ, 20-25HZ, 20-25HZ, to ensure that the breaker can smoothly adjust the operating frequency and reduce the breaker’s operating frequency.
  • the fault problem caused by the excessive speed change occurs during the operation adjustment, which improves the overall service life.
  • the pulping system also includes a frequency converter. Both the pulper and the white water pump are equipped with a frequency converter.
  • the frequency converter can adjust the speed of the pulper and the white water pump respectively, and the speed switching effect is good. , Can ensure the smooth operation of the pulper and the white water pump; in addition, due to the characteristics of heavy load operation of the pulper and large load fluctuations, it is necessary to consider the selection of heavy-duty frequency conversion and torque vector control in the frequency conversion selection Function to meet the working conditions of large current impact, large starting torque, frequent speed adjustment, etc.
  • the frequency conversion speed governor is connected with a DCS control system, which is an existing technology, and will not be described in detail in the present invention ,
  • the DCS control system realizes the fully automatic control of the frequency converter. The whole process does not require manual adjustment of the operating frequency. It can quickly realize the automatic change of the operating frequency at different stages of the pulping process, and further improve the production efficiency.
  • the present invention has other embodiments.
  • Those skilled in the art can make various changes and modifications according to the present invention. As long as they do not deviate from the spirit of the present invention, they should all be defined by the appended claims of the present invention. range.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

A pulping method for household paper, using a pulping system, the pulping system comprising a pulping machine, a white water pump, a roller conveyor, a chain conveyor, and a pulping discharge pump. The pulping method comprises the following steps in sequence: adding water, feeding, beating, extraction, and washing. The operating frequencies of the white water pump and the pulping machine are set in different pulping sections, avoiding the waste of electrical energy caused by operation of the existing white water pump and pulping machine at high speed, saving production costs; the electricity consumption per ton of paper in the pulping system is reduced by 40%, the electricity consumption of the pulping machine is reduced by 25%, and the electricity consumption of the pulping white water pump is reduced by 79%.

Description

一种生活用纸的碎浆方法Method for pulping household paper 技术领域Technical field
本发明涉及一种生活用纸的碎浆方法。The invention relates to a pulping method for household paper.
背景技术Background technique
近年来生活用纸行业飞速发展产能急剧上升，2017年12月我国生活用纸产量已达1295.7万吨。因产能的急剧上升、原料价格的急剧上涨，导致竞争异常激烈，整个行业已进入了微利时代，而现有生活用纸在碎浆工艺中，碎浆***通常采用循环碎浆工艺，每次碎浆时间13至17分钟：由加水时段、上料时段、打浆时段、抽浆时段组成一个碎浆循环，整个过程中碎浆机与碎浆白水泵恒速运转，导致碎浆工艺中电能浪费的问题。In recent years, the household paper industry has developed rapidly and the production capacity has risen sharply. In December 2017, my country's household paper production reached 12.957 million tons. Due to the sharp increase in production capacity and the sharp increase in raw material prices, competition has been extremely fierce. The entire industry has entered an era of meager profit. In the pulping process of existing household paper, the pulping system usually adopts a circular pulping process. Pulping time 13 to 17 minutes: a pulping cycle is composed of the water adding period, the feeding period, the beating period, and the pumping period. The pulper and the pulping white water pump operate at a constant speed during the whole process, which leads to waste of electricity in the pulping process problem.
发明内容Summary of the invention
本发明所要达到的目的就是提供一种生活用纸的碎浆方法，解决现有碎浆工艺导致电能浪费的问题。The purpose of the present invention is to provide a pulping method for household paper, and solve the problem of waste of electric energy caused by the existing pulping process.
为了解决上述技术问题，本发明是通过以下技术方案实现的：一种生活用纸的碎浆方法，包括碎浆***，所述碎浆***包括碎浆机、白水泵、辊道输送机、链板输送机和碎浆卸料泵，所述碎浆方法依次包括以下步骤：In order to solve the above technical problems, the present invention is realized through the following technical solutions: a method for pulping household paper, including a pulping system, the pulping system including a pulper, a white water pump, a roller conveyor, and a chain Plate conveyor and pulping discharge pump, the pulping method includes the following steps in sequence:
步骤一：加水：通过白水泵向碎浆机内加水，白水泵的运行频率为50～60HZ，且加水的时间为1～2min，碎浆机的运行频率为15～20HZ；Step 1: Add water: add water to the pulper through a white water pump. The operating frequency of the white water pump is 50-60HZ, and the time for adding water is 1~2min, and the operating frequency of the pulper is 15-20HZ;
步骤二：上料：通过辊道输送机和链板输送机将木浆输送至步骤一加水后的碎浆机内，上料的时间为1～2min，白水泵的运行频率为50～60HZ，碎浆机 的运行频率为35～40HZ；Step 2: Feeding: The wood pulp is transported to the pulper after adding water through the roller conveyor and the chain conveyor. The feeding time is 1 to 2 minutes, and the operating frequency of the white water pump is 50 to 60HZ. The operating frequency of the pulper is 35～40HZ;
步骤三：打浆：通过碎浆机将步骤二上料后的木浆分解打散成浆料，白水泵的运行频率为5～10HZ，碎浆机的运行频率为50～55HZ，且碎浆机的工作时间为7～9min；Step 3: Pulping: Use a pulper to decompose and break the wood pulp after feeding into a slurry. The operating frequency of the white water pump is 5-10HZ, the operating frequency of the pulper is 50-55HZ, and the pulper The working time is 7-9min;
步骤四：抽浆：通过碎浆卸料泵将步骤三打浆后的浆料快速的抽走，白水泵的运行频率为20～25HZ，碎浆机的运行频率为20～25HZ，且碎浆卸料泵的工作时间为90～120S；Step 4: Pumping: The slurry after beating in step 3 is quickly pumped away by the pulping discharge pump. The operating frequency of the white water pump is 20-25HZ, the operating frequency of the pulper is 20-25HZ, and the pulp is discharged The working time of the feed pump is 90～120S;
步骤五：清洗：通过白水泵将步骤四处理后的碎浆机内加水进行清洗，白水泵的运行频率为35～40HZ，碎浆机的运行频率为20～25HZ，且碎浆机的清洗时间为20～40S。Step 5: Cleaning: Use a white water pump to add water to the pulper processed in step 4 for cleaning. The operating frequency of the white water pump is 35-40HZ, the operating frequency of the pulper is 20-25HZ, and the cleaning time of the pulper For 20 to 40S.
优选的，所述碎浆***还包括变频调速器，所述碎浆机和白水泵上均安装有变频调速器。Preferably, the pulping system further includes a frequency converter, and both the pulper and the white water pump are equipped with a frequency converter.
优选的，所述变频调速器上连接有DCS控制***。Preferably, a DCS control system is connected to the frequency conversion speed regulator.
综上所述，本发明的优点：1.本发明中通过加水、上料、打浆、抽浆和清洗的碎浆方法，由于在加水工段白水泵为做功阶段，破浆机为不做功阶段，因此在加水工段将白水泵设置成高速运行，以及破浆机低速运行，碎浆工段破浆机为做功阶段，白水泵为不做功阶段，因此将白水泵设置成低速运行，破浆机高速运行，抽浆工段白水泵和破浆机均为不做功阶段，因此将白水泵和破浆机均设置成低速运行，通过在碎浆的不同工段设置白水泵和碎浆机的运行频率，消除了现有白水泵和碎浆机设备高速运转存在电能浪费的现象，节约了生产成 本，碎浆***的吨纸耗电下降40％，其中碎浆机的耗电下降25％，碎浆白水泵的耗电下降79％，另外，现有恒速的碎浆***用电单耗22.6度电/吨纸，而采用本发明的碎浆方法，用电单耗12.5度电/吨纸；碎浆单耗下降10.1度/吨纸，单台产量按3万吨计算，电价平均0.6元/度；年节省电费＝3万吨*10.1度/吨*0.6元/度＝18.18万元；10个月左右可收回投资成本，另外，由于木浆有长纤木浆和短纤木浆，长纤木浆相对于短纤而言难以碎解，因此在打浆工序中设置碎浆机的工作时间为7～9min，使打浆过程中碎浆质量、满足生产工艺；In summary, the advantages of the present invention: 1. In the present invention, the pulping method of adding water, feeding, beating, pumping and cleaning is adopted. Since the white water pump is the working stage in the water adding section, the breaker is the non-working stage. Therefore, the white water pump is set to run at high speed in the water processing section, and the breaker runs at low speed. The breaker in the pulping section is the power stage, and the white water pump is the non-power stage. Therefore, the white water pump is set to run at low speed and the breaker runs at high speed. , The white water pump and the pulper in the pulping section are both in the non-working stage, so the white water pump and the pulper are set to operate at low speeds. By setting the operating frequency of the white water pump and the pulper in different sections of the pulping, it is eliminated The high-speed operation of the existing white water pump and pulper equipment has the phenomenon of waste of electricity, which saves production costs. The power consumption of the pulping system per ton of paper is reduced by 40%. The power consumption of the pulper is reduced by 25%. Power consumption decreased by 79%. In addition, the existing constant-speed pulping system consumes 22.6 kilowatt-hours of electricity per ton of paper, while the pulping method of the present invention consumes 12.5 kilowatts of electricity per ton of paper; Decrease by 10.1 degrees/ton of paper, the output of a single unit is calculated at 30,000 tons, and the average electricity price is 0.6 yuan/kWh; annual electricity savings = 30,000 tons * 10.1 kWh/ton * 0.6 yuan/kWh = 181,800 yuan; about 10 months Recover investment costs. In addition, since wood pulp has long-fiber wood pulp and short-fiber wood pulp, long-fiber wood pulp is difficult to disintegrate compared to short fiber. Therefore, the working time of setting a pulper in the beating process is 7-9 minutes , So that the pulp quality in the beating process meets the production process;
2.由于上料阶段为木浆上料阶段，设置在加水和打浆之间，且上料阶段的白水泵的运行频率为50～60HZ，碎浆机的运行频率为35～40HZ，能确保上料阶段中木浆能进行初步的分解，提高打浆的效率，提高浆料的质量，清洗阶段为对碎浆机进行清洗工序，为下一个碎浆循环做准备基础，大大节约了整体的破浆效率；2. Since the feeding stage is the wood pulp feeding stage, it is set between water adding and beating, and the operating frequency of the white water pump in the feeding stage is 50-60HZ, and the operating frequency of the pulper is 35-40HZ, which can ensure In the material stage, the wood pulp can be decomposed preliminarily to improve the efficiency of beating and the quality of the pulp. The cleaning stage is to clean the pulper and prepare the foundation for the next pulping cycle, which greatly saves the overall pulping. effectiveness;
3.且将破浆机的运行频率分别设置成15～20HZ、35～40HZ、50～55HZ、20～25HZ、20～25HZ，能确保破浆机能平稳的进行运行频率的调整，减少了破浆机在运转调节时出现转速变化过大而产生的故障问题，提高了整体的使用寿命；3. And set the operating frequency of the breaker to 15-20HZ, 35-40HZ, 50-55HZ, 20-25HZ, 20-25HZ, to ensure that the breaker can adjust the operating frequency smoothly and reduce the breakage When the machine is running and adjusting, there are problems caused by excessive speed changes, which improves the overall service life;
4.变频调速器能分别对碎浆机和白水泵进行速度调节，速度切换效果好，能确保碎浆机和白水泵的平稳运行；4. The frequency converter can adjust the speed of the pulper and the white water pump separately, and the speed switching effect is good, which can ensure the smooth operation of the pulper and the white water pump;
5.DCS控制***实现了变频调速器的全自动化控制，整个过程不需要人为调节运行频率，能快速的实现碎浆工艺不同阶段自动改变运行频率，进一步提高了生产效率。5. The DCS control system realizes the fully automatic control of the frequency converter. The whole process does not require manual adjustment of the operating frequency. It can quickly realize the automatic change of the operating frequency in different stages of the pulping process, and further improve the production efficiency.
具体实施方式detailed description
一种生活用纸的碎浆方法，包括碎浆***，所述碎浆***包括碎浆机、白水泵、辊道输送机、链板输送机和碎浆卸料泵，所述碎浆方法依次包括以下步骤：A method for pulping household paper, including a pulping system. The pulping system includes a pulper, a white water pump, a roller conveyor, a chain conveyor, and a pulping discharge pump. The pulping method in turn It includes the following steps:
步骤一：加水：通过白水泵向碎浆机内加水，白水泵的运行频率为50HZ，且加水的时间为2min，碎浆机的运行频率为15HZ；Step 1: Add water: add water to the pulper through a white water pump. The operating frequency of the white water pump is 50HZ, and the time for adding water is 2min, and the operating frequency of the pulper is 15HZ;
步骤二：上料：通过辊道输送机和链板输送机将木浆输送至步骤一加水后的碎浆机内，上料的时间为1min，白水泵的运行频率为50HZ，碎浆机的运行频率为35HZ；Step 2: Feeding: The wood pulp is transported to the pulper after adding water in step 1 through the roller conveyor and chain conveyor. The feeding time is 1 min, the operating frequency of the white water pump is 50HZ, and the pulper's Operating frequency is 35HZ;
步骤三：打浆：通过碎浆机将步骤二上料后的木浆分解打散成浆料，白水泵的运行频率为5HZ，碎浆机的运行频率为50HZ，且碎浆机的工作时间为7～9min；Step 3: Pulping: Use a pulper to decompose and disperse the wood pulp after feeding into a slurry. The operating frequency of the white water pump is 5HZ, the operating frequency of the pulper is 50HZ, and the working time of the pulper is 7～9min;
步骤四：抽浆：通过碎浆卸料泵将步骤三打浆后的浆料快速的抽走，白水泵的运行频率为25HZ，碎浆机的运行频率为25HZ，且碎浆卸料泵的工作时间为120S；Step 4: Slurry pumping: The slurry after beating in step 3 is quickly pumped away by the slurry unloading pump. The operating frequency of the white water pump is 25HZ, the operating frequency of the pulper is 25HZ, and the operation of the slurry unloading pump The time is 120S;
步骤五：清洗：通过白水泵将步骤四处理后的碎浆机内加水进行清洗，白水泵的运行频率为35HZ，碎浆机的运行频率为20HZ，且碎浆机的清洗时间为20～40S。Step 5: Cleaning: Use a white water pump to add water to the pulper processed in step 4 for cleaning. The operating frequency of the white water pump is 35HZ, the operating frequency of the pulper is 20HZ, and the cleaning time of the pulper is 20-40S .
本发明中通过加水、上料、打浆、抽浆和清洗的碎浆方法，由于在加水工段白水泵为做功阶段，破浆机为不做功阶段，因此在加水工段将白水泵设置成 高速运行，以及破浆机低速运行，碎浆工段破浆机为做功阶段，白水泵为不做功阶段，因此将白水泵设置成低速运行，破浆机高速运行，抽浆工段白水泵和破浆机均为不做功阶段，因此将白水泵和破浆机均设置成低速运行，通过在碎浆的不同工段设置白水泵和碎浆机的运行频率，消除了现有白水泵和碎浆机设备高速运转存在电能浪费的现象，节约了生产成本，碎浆***的吨纸耗电下降40％，其中碎浆机的耗电下降25％，碎浆白水泵的耗电下降79％，另外，现有恒速的碎浆***用电单耗22.6度电/吨纸，而采用本发明的碎浆方法，用电单耗12.5度电/吨纸；碎浆单耗下降10.1度/吨纸，单台产量按3万吨计算，电价平均0.6元/度；年节省电费＝3万吨*10.1度/吨*0.6元/度＝18.18万元；10个月左右可收回投资成本，另外，由于木浆有长纤木浆和短纤木浆，长纤木浆相对于短纤而言难以碎解，因此在打浆工序中设置碎浆机的工作时间为7～9min，使打浆过程中碎浆质量、满足生产工艺。In the present invention, the pulping method of adding water, feeding, beating, pumping and cleaning is adopted. Since the white water pump is in the working stage in the water adding section and the breaker is in the non-working stage, the white water pump is set to operate at high speed in the water adding section. And the breaker runs at low speed, the breaker in the pulping section is the working stage, and the white water pump is the non-working stage, so the white water pump is set to run at low speed, and the breaker runs at high speed. Both the white water pump and the breaker in the pumping section are In the non-working stage, both the white water pump and the pulper are set to operate at low speed. By setting the operating frequency of the white water pump and the pulper in different sections of the pulping, the high-speed operation of the existing white water pump and pulper equipment is eliminated The phenomenon of waste of electrical energy saves production costs. The power consumption per ton of paper in the pulping system is reduced by 40%, among which the power consumption of the pulper is reduced by 25%, and the power consumption of the pulping white water pump is reduced by 79%. In addition, the existing constant speed The unit electricity consumption of the pulping system is 22.6 kWh/ton of paper, while the pulping method of the present invention consumes 12.5 kWh of electricity/ton of paper; the unit of pulping consumption is reduced by 10.1 kWh/ton of paper, and the output per unit is 3 Calculated in 10,000 tons, the average electricity price is 0.6 yuan/kWh; annual electricity savings = 30,000 tons*10.1 kWh/ton*0.6 yuan/kWh = 181,800 yuan; investment costs can be recovered in about 10 months, in addition, because wood pulp has long fibers Wood pulp and short fiber wood pulp, long fiber wood pulp is difficult to disintegrate compared to short fiber, so the working time of the pulper in the beating process is 7-9min, so that the pulp quality during the beating process meets the production process .
由于上料阶段为木浆上料阶段，设置在加水和打浆之间，且上料阶段的白水泵的运行频率为50～60HZ，碎浆机的运行频率为35～40HZ，能确保上料阶段中木浆能进行初步的分解，提高打浆的效率，提高浆料的质量，清洗阶段为对碎浆机进行清洗工序，为下一个碎浆循环做准备基础，大大节约了整体的破浆效率；且将破浆机的运行频率分别设置成15～20HZ、35～40HZ、50～55HZ、20～25HZ、20～25HZ，能确保破浆机能平稳的进行运行频率的调整，减少了破浆机在运转调节时出现转速变化过大而产生的故障问题，提高了整体的使用寿命。Since the feeding stage is the wood pulp feeding stage, it is set between water adding and beating, and the operating frequency of the white water pump in the feeding stage is 50-60HZ, and the operating frequency of the pulper is 35-40HZ, which can ensure the feeding stage Zhongmu pulp can carry out preliminary decomposition, improve the efficiency of beating, and improve the quality of the pulp. The cleaning stage is to clean the pulper and prepare the foundation for the next pulping cycle, which greatly saves the overall pulping efficiency; And set the operating frequency of the breaker to 15-20HZ, 35-40HZ, 50-55HZ, 20-25HZ, 20-25HZ, to ensure that the breaker can smoothly adjust the operating frequency and reduce the breaker’s operating frequency. The fault problem caused by the excessive speed change occurs during the operation adjustment, which improves the overall service life.
所述碎浆***还包括变频调速器，所述碎浆机和白水泵上均安装有变频调 速器，变频调速器能分别对碎浆机和白水泵进行速度调节，速度切换效果好，能确保碎浆机和白水泵的平稳运行；另外，由于碎浆机为重载负荷运行、并且负荷波动大的特性，因此在变频选型上需考虑选用重载变频、具备转矩矢量控制功能，以满足大电流冲击及起动转矩大、调速频繁等工况环境，所述变频调速器上连接有DCS控制***，DCS控制***为现有技术，本发明中不做详细的阐述，DCS控制***实现了变频调速器的全自动化控制，整个过程不需要人为调节运行频率，能快速的实现碎浆工艺不同阶段自动改变运行频率，进一步提高了生产效率。The pulping system also includes a frequency converter. Both the pulper and the white water pump are equipped with a frequency converter. The frequency converter can adjust the speed of the pulper and the white water pump respectively, and the speed switching effect is good. , Can ensure the smooth operation of the pulper and the white water pump; in addition, due to the characteristics of heavy load operation of the pulper and large load fluctuations, it is necessary to consider the selection of heavy-duty frequency conversion and torque vector control in the frequency conversion selection Function to meet the working conditions of large current impact, large starting torque, frequent speed adjustment, etc. The frequency conversion speed governor is connected with a DCS control system, which is an existing technology, and will not be described in detail in the present invention , The DCS control system realizes the fully automatic control of the frequency converter. The whole process does not require manual adjustment of the operating frequency. It can quickly realize the automatic change of the operating frequency at different stages of the pulping process, and further improve the production efficiency.
除上述优选实施例外，本发明还有其他的实施方式，本领域技术人员可以根据本发明作出各种改变和变形，只要不脱离本发明的精神，均应属于本发明所附权利要求所定义的范围。In addition to the above-mentioned preferred embodiments, the present invention has other embodiments. Those skilled in the art can make various changes and modifications according to the present invention. As long as they do not deviate from the spirit of the present invention, they should all be defined by the appended claims of the present invention. range.

Claims (3)

  1. 一种生活用纸的碎浆方法，包括碎浆***，所述碎浆***包括碎浆机、白水泵、辊道输送机、链板输送机和碎浆卸料泵，其特征在于：所述碎浆方法依次包括以下步骤：A method for pulping household paper, including a pulping system, the pulping system including a pulper, a white water pump, a roller conveyor, a chain conveyor, and a pulping discharge pump, characterized in that: The pulping method sequentially includes the following steps:
    步骤一：加水：通过白水泵向碎浆机内加水，白水泵的运行频率为50～60HZ，且加水的时间为1～2min，碎浆机的运行频率为15～20HZ；Step 1: Add water: add water to the pulper through a white water pump. The operating frequency of the white water pump is 50-60HZ, and the time for adding water is 1~2min, and the operating frequency of the pulper is 15-20HZ;
    步骤二：上料：通过辊道输送机和链板输送机将木浆输送至步骤一加水后的碎浆机内，上料的时间为1～2min，白水泵的运行频率为50～60HZ，碎浆机的运行频率为35～40HZ；Step 2: Feeding: The wood pulp is transported to the pulper after adding water through the roller conveyor and the chain conveyor. The feeding time is 1 to 2 minutes, and the operating frequency of the white water pump is 50 to 60HZ. The operating frequency of the pulper is 35～40HZ;
    步骤三：打浆：通过碎浆机将步骤二上料后的木浆分解打散成浆料，白水泵的运行频率为5～10HZ，碎浆机的运行频率为50～55HZ，且碎浆机的工作时间为7～9min；Step 3: Pulping: Use a pulper to decompose and break the wood pulp after feeding into a slurry. The operating frequency of the white water pump is 5-10HZ, the operating frequency of the pulper is 50-55HZ, and the pulper The working time is 7-9min;
    步骤四：抽浆：通过碎浆卸料泵将步骤三打浆后的浆料快速的抽走，白水泵的运行频率为20～25HZ，碎浆机的运行频率为20～25HZ，且碎浆卸料泵的工作时间为90～120S；Step 4: Pumping: The slurry after beating in step 3 is quickly pumped away by the pulping discharge pump. The operating frequency of the white water pump is 20-25HZ, the operating frequency of the pulper is 20-25HZ, and the pulp is discharged The working time of the feed pump is 90～120S;
    步骤五：清洗：通过白水泵将步骤四处理后的碎浆机内加水进行清洗，白水泵的运行频率为35～40HZ，碎浆机的运行频率为20～25HZ，且碎浆机的清洗时间为20～40S。Step 5: Cleaning: Use a white water pump to add water to the pulper processed in step 4 for cleaning. The operating frequency of the white water pump is 35-40HZ, the operating frequency of the pulper is 20-25HZ, and the cleaning time of the pulper For 20 to 40S.
  2. 根据权利要求1所述一种生活用纸的碎浆方法，其特征在于：所述碎浆***还包括变频调速器，所述碎浆机和白水泵上均安装有变频调速器。The method for pulping household paper according to claim 1, wherein the pulping system further comprises a frequency converter, and both the pulper and the white water pump are equipped with a frequency converter.
  3. 根据权利要求2所述一种生活用纸的碎浆方法，其特征在于:所述变频调速 器上连接有DCS控制***。The method for pulping household paper according to claim 2, characterized in that: the frequency converter is connected with a DCS control system.
PCT/CN2019/129643 2019-03-08 2019-12-28 Pulping method for household paper WO2020181885A1 (en)

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