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Method and system for realizing zero emission of papermaking pulp residue and sludge

A papermaking pulp and zero-emission technology, applied in the field of papermaking, can solve problems such as environmental pollution, environmental pollution, and increased processing costs

Inactive Publication Date: 2014-04-16
吕建荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The treatment of pulp slag and sludge has always been a problem that plagues the environmental protection work of paper-making enterprises. For the sludge generated by wastewater treatment, most paper-making enterprises currently adopt the method of dehydrating and transporting to landfill with a sludge dehydrator. The dehydration equipment will dry or concentrate the sludge, and then find a place to landfill, which will not only generate secondary pollution, but also increase the treatment cost. The papermaking waste and sludge discharged by these enterprises waste a lot of land and forest resources, and there are still environmental pollution and safety hazards
From another point of view, papermaking waste residue and sludge contain a lot of fine fibers and short fiber fluff. As long as they can be effectively filtered and separated, they can be reused as papermaking raw materials in production. It can be seen that using The disposal of papermaking pulp residue and sludge by landfill not only pollutes the environment, but also makes these renewable resources that could have been recycled not fully utilized, thus wasting resources

Method used

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  • Method and system for realizing zero emission of papermaking pulp residue and sludge
  • Method and system for realizing zero emission of papermaking pulp residue and sludge

Examples

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Embodiment 1

[0013] like figure 1 A method for zero discharge of papermaking pulp residue and sludge is shown: firstly filter the excess white water, recycle the fine fibers in it to the slurry system for utilization, and then use the physical precipitation method for the remaining wastewater, and add PAC and PAM Drugs, settling for 120 minutes to achieve solid-liquid separation, the sludge generated by settling is collected to the slurry system for recycling, the clear water after physical and chemical treatment is returned to the production system for closed cycle use, and the excess water is pumped to the biochemical system for use in anoxic and concurrently Aerobic microbial hydrolysis for further biochemical treatment, in which it stays in an anoxic environment for 30 hours, then transports it to a facultative environment for 24 hours, and then settles, and the sludge generated by the sedimentation is still collected in the slurry system for recycling. The treated supernatant can cont...

Embodiment 2

[0015] like figure 2 A papermaking pulp residue and sludge zero discharge system is shown: after the excess white water in the pulping and papermaking workshop 1 removes coarse plastic sheets and impurities through the grid machine 2, it enters the inclined screen 3 for filtration, and the fine fibers in the white water are separated to Sludge recovery pool 4 is transported to pulp and paper workshop 1 by pulp pump 6, and the remaining waste water flows into sump 5, and is transported to four high-efficiency purification towers with a height of 18 meters and a diameter of 16 meters by a waste water lifting pump 7 Coagulation and sedimentation are carried out in 8, at the same time, the medicinal liquid in the PAC dispensing pool 9 is transported to the sewage high-efficiency purification tower 8 through the waste water lifting pump 7, and the medicinal liquid in the PAM dispensing pool 13 is transported to the high-efficiency purification tower 8 through the dosing pump 12. I...

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Abstract

The invention belongs to the field of papermaking and relates to a method and a system for realizing zero emission of papermaking pulp residue and sludge. Waste water generated in papermaking is processed by steps of filtering, physical sedimentation, biochemical treatment and sedimentation, in other words, pulp residue and sludge in waste water are recovered at multiple levels and stages and then are supplied to a slurry system for production, so that pulp residue and sludge in the waste water are recovered completely and zero emission thereof is achieved. In the system, by the aid of filtering and purifying facilities such as a grid machine and an inclined screen for filter, an efficient purifying tower for settling, an anaerobic tank and an aerobic tank for performing biochemical treatment and a secondary sedimentation tank and tertiary sedimentation tank for performing re-sedimentation, the pulp residue and sludge of the waste water are separated completely and then delivered to papermaking workshops to be recovered, and thus, zero emission of the pulp residue and sludge in papermaking is realized.

Description

technical field [0001] The invention belongs to the field of papermaking, and relates to the treatment of papermaking pulp slag and sludge, in particular to a method for zero discharge of papermaking pulp slag and sludge, and a system. Background technique [0002] The treatment of pulp slag and sludge has always been a problem that plagues the environmental protection work of paper-making enterprises. For the sludge generated by wastewater treatment, most paper-making enterprises currently adopt the method of dehydrating and transporting to landfill with a sludge dehydrator. The dehydration equipment will dry or concentrate the sludge, and then find a place to landfill, which will not only generate secondary pollution, but also increase the treatment cost. The papermaking waste and sludge discharged by these enterprises waste a lot of land and forest resources, and there are still Environmental pollution and safety hazards. From another point of view, papermaking waste res...

Claims

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Application Information

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IPC IPC(8): D21F1/66C02F9/14
Inventor 吕建荣
Owner 吕建荣
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