Papermaking pulping black liquor treatment system

A technology for pulping black liquor and treatment system in papermaking, which is applied in processing wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Excessive discharge of sewage treatment and other problems, to achieve the effect of small footprint, saving power consumption and operating costs, and saving investment costs

Active Publication Date: 2015-09-30
浙江凯恩新材料有限公司 +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The selection of equipment is backward, so that the wastewater treatment station cannot run smoothly, resulting in the discharge of sewage treatment sometimes exceeding the standard

Method used

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  • Papermaking pulping black liquor treatment system

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Embodiment Construction

[0035] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] Such as figure 1 A papermaking pulping black liquor treatment system is shown, which includes a papermaking pulping black liquor collection system, an acid precipitation treatment tank, a neutralization tank, a neutralization sedimentation tank, a homogeneous tank, and an upflow anaerobic sludge bed , biochemical tank, comprehensive adjustment tank, sedimentation tank, A / O biochemical tank, secondary sedimentation tank, tertiary sedimentation tank and sewage discharge system, the described papermaking pulping black liquor collection system is connected to the acid analysis treatment by pipelines Add 98% industrial sulfuric acid to the acid analysis pool, and the dosage is based on the pH of the water quality to 3-4.5. Add flocculant PAC in the acid analysis and settling tank, the preparation concentration is 15%, and the...

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Abstract

The invention relates to a papermaking wastewater treatment system. The system comprises a papermaking pulping black liquor collecting system, an acid separation treatment tank, a neutralization tank, a neutralization and precipitation tank, a homogenizing tank, an upflow anaerobic sludge blanket (UASB), a biochemical tank, a comprehensive adjusting tank, a precipitation tank, an A/O biochemical tank, a secondary precipitation tank, a third precipitation tank and a sewage discharging system. The system has the following advantages: through biochemical-UASB reactor-A/O method three-stage treatment, a very high treatment effect is achieved, the effluent is very stable and the impact resistance is high; 2, compared with the traditional activated sludge method (SBR method), the system is capable of saving investment cost by 20% and saving operation cost by 25% or above; 3, the aeration equipment used in the process is the most advanced microporous aeration equipment; compared with surface aeration and jet processes, the process adopted in the invention has the advantages that the oxygen conversion rate is improved by 10-15%, power consumption and operation cost can be reduced greatly, and the operation efficiency is improved; and 4, the system has obvious superiority when used for treating wastewater with relatively high concentration.

Description

technical field [0001] The invention relates to a papermaking wastewater treatment system. Background technique [0002] Production of long-fiber pulp as the leading product and products such as paper for electrolytic capacitors and aluminum foil paper. The raw material of long-fiber pulp is produced by chemical pulping of sisal raw materials. During the production process, a large amount of black liquor, mid-stage wastewater and other high-concentration organic pollutants are produced. . Black liquor concentration CODcr: 13000-20000mg / l, NH3-N concentration 350mg / l, if not treated, it will not only pollute the environment, but also not meet the national "Pulp and Paper Industry Water Pollutant Discharge Standard" (GB3544-2008) table 2 Standard limits for pulping production. Protecting the environment and preventing pollution is an inevitable trend and requirement for the sustainable development of the pulp and paper industry. In my country, there are very few pulping comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28
Inventor 华亚民严永平刘成跃陈然李大方
Owner 浙江凯恩新材料有限公司
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