WO2017161918A1 - 秸杆制浆废水处理系统 - Google Patents

秸杆制浆废水处理系统 Download PDF

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Publication number
WO2017161918A1
WO2017161918A1 PCT/CN2016/108920 CN2016108920W WO2017161918A1 WO 2017161918 A1 WO2017161918 A1 WO 2017161918A1 CN 2016108920 W CN2016108920 W CN 2016108920W WO 2017161918 A1 WO2017161918 A1 WO 2017161918A1
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Prior art keywords
tank
pool
sludge
pulping wastewater
egsb
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PCT/CN2016/108920
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English (en)
French (fr)
Inventor
滕铁生
张跃平
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新疆国力源投资有限公司
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Priority to MYPI2017704422A priority Critical patent/MY186070A/en
Publication of WO2017161918A1 publication Critical patent/WO2017161918A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
    • C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors

Definitions

  • the invention relates to a straw pulping wastewater treatment system.
  • Straw pulping wastewater generally includes black liquor produced by cooking and mid-stage water produced by bleaching.
  • the pollutants contained in black liquor generally account for more than 90% of the total pollutant discharge of the plant.
  • the pollutants contained in the middle water generally account for the pollutant discharge of the plant.
  • the total amount is 8-9%.
  • the treatment of pulping wastewater generally includes an alkali recovery method, a chemical flocculation method, a biological method, and the like.
  • the object of the present invention is to provide a straw pulping wastewater treatment system for recycling waste water.
  • the present invention provides the following technical solutions:
  • Straw pulping wastewater treatment system including inclined sieve connected in turn according to the flow direction of pulping wastewater, primary sedimentation tank, hydrolysis acidification tank, EGSB double-cycle anaerobic reactor, aerobic biological aeration tank, secondary sedimentation tank, flocculation sedimentation
  • the pool and the middle pool wherein the inclined sieve is used for recovering the fibers in the straw pulping wastewater, the wastewater in the middle pool is returned to the pulping workshop, the primary sedimentation tank, the EGSB double-cycle anaerobic reactor, the secondary sedimentation tank and the flocculation sedimentation tank
  • the sludge outlets are respectively connected to the sludge tank inlet, and the biogas outlet of the EGSB double-cycle anaerobic reactor is connected to the biogas generator set.
  • a heat exchanger is connected in series between the hydrolysis acidification tank and the EGSB double-cycle anaerobic reactor to exchange heat between the pulping wastewater and the dryer condensate.
  • outlet of the sludge tank is connected to the inlet of the sludge concentration tank, and the outlet of the sludge concentration tank is connected to the plate and frame filter press.
  • straw pulping wastewater is black liquor and/or middle water.
  • the treatment system of the invention can realize the closed recycling of the pulping wastewater, achieve zero pollution discharge, and save water.
  • Figure 1 is a schematic view of a straw pulping wastewater treatment system of the present invention
  • Figure 2 is a schematic diagram of a mid-stage water treatment system
  • Figure 3 is a schematic diagram of a black liquor treatment system.
  • the straw pulping wastewater treatment system of the present invention comprises a double-cycle anaerobic slanting screen, a primary sedimentation tank, a hydrolysis acidification tank, and an EGSB (expanded granular sludge bed) which are sequentially connected according to the flow direction of the pulping wastewater.
  • a reactor an aerobic biological aeration tank, a secondary sedimentation tank, a flocculation sedimentation tank and a middle water tank, wherein the fibers in the straw pulping wastewater are intercepted by oblique screening, and the retained fibers are sent to the recovery slurry tank, and the wastewater in the middle water tank It can be returned to the pulping workshop for reuse.
  • the sludge outlets of the primary sedimentation tank, the EGSB double-cycle anaerobic reactor, the secondary sedimentation tank and the flocculation sedimentation tank are respectively connected with the sludge tank inlet, and the sludge tank outlet and the sludge concentration tank are
  • the inlet is connected
  • the outlet of the sludge concentration tank is connected with the plate and frame filter press
  • the biogas outlet of the EGSB double-cycle anaerobic reactor is connected with the biogas generator set, and can be connected in series on the pipeline of the hydrolysis acidification tank and the EGSB double-cycle anaerobic reactor.
  • the wastewater generated by bleaching during straw pulping is sent to the middle pool.
  • the overflow wastewater from the middle pool is intercepted by the mechanical grille and then enters the catchment adjustment tank (with an accident discharge tank, emergency).
  • Spare part) part of the wastewater in the water collection tank can be reused for hydraulic pulping, and another part of the wastewater in the water collecting tank is sent to the inclined sieve for filtration by the first-stage lifting pump, and the stranded fiber is sent to the recovery slurry pool.
  • Waste water is sent to a hydrolysis acidification tank for hydrolysis and acidification, and then the secondary lift pump sends the waste water to the heat exchanger for heat exchange with the dryer condensate from the papermaking plant. After heat exchange, it is sent to the EGSB double-cycle anaerobic reactor for anaerobic reaction.
  • the sludge produced by the EGSB double-cycle anaerobic reactor is discharged into the sludge tank.
  • the biogas is sent to the biogas generator set for power generation, and the wastewater is sent to aerobic biological aeration.
  • the tank is subjected to aeration treatment, and the wastewater after the aeration treatment enters the secondary settling tank, and the sludge generated by the secondary settling tank is discharged into the sludge tank, and the waste water is sent to the flocculation sedimentation tank to be flocculated and precipitated by using polyaluminum chloride (PAC), and flocculation and sedimentation are produced.
  • PAC polyaluminum chloride
  • the sludge is discharged into the sludge tank, and the waste water after flocculation and sedimentation is sent to the middle pool.
  • the water in the middle pool is returned to the bleaching workshop for reuse, and can also be used as fire water, and the other part is treated with a membrane treatment system for concentration purification and then sent to the paper machine.
  • the felt is washed with water.
  • the sludge in the sludge tank is sent to the sludge concentration tank for natural volatilization and concentration, and then sent to the plate and frame filter press to be pressed into a filter cake, which can be used as a bio-organic fertilizer.
  • the high-concentration black liquor extracted after cooking in straw pulping intercepts some large debris through the mechanical grille and then enters the water collecting tank (with accident discharge tank, emergency standby), collecting water.
  • the black liquor in the adjustment tank is sent to the inclined sieve for filtration by the first-stage lifting pump, and the fiber intercepted by the oblique sieve is sent to the recovery slurry tank for recovery, and the black liquor that has been sieved through the inclined sieve enters the primary sedimentation tank for sedimentation, and the sludge generated by the sedimentation is discharged.
  • the sludge tank, the precipitated wastewater is sent to the hydrolysis acidification tank for hydrolysis and acidification, and then the secondary lift pump feeds the waste water into the heat exchanger and exchanges heat with the condensate from the papermaking workshop, and then transfers it after heat exchange.
  • the EGSB double-cycle anaerobic reactor carries out the anaerobic reaction, the sludge produced by the EGSB double-cycle anaerobic reactor is discharged into the sludge tank, the biogas is sent to the biogas generating unit for power generation, and the wastewater is sent to the aerobic biological aeration tank for aeration treatment.
  • the wastewater after aeration treatment enters the secondary settling tank, and the sludge generated by the secondary sedimentation tank is discharged into the sludge tank, and the waste water is sent to the flocculation sedimentation tank for flocculation and sedimentation by using polyaluminum chloride (PAC), and the sludge generated by flocculation and sedimentation is discharged into the sewage.
  • PAC polyaluminum chloride
  • Mud pool wastewater after flocculation and sedimentation The water is sent to the middle pool, and the water in the middle pool is returned to the cooking workshop as water for pulping.
  • the sludge in the sludge tank is sent to the sludge concentration tank for natural volatilization and concentration, and then sent to the plate and frame filter press to be pressed into a filter cake, which can be used as a bio-organic fertilizer.

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

一种秸杆制浆废水处理系统，包括按制浆废水的流向依次连接的斜筛、初沉池、水解酸化池、EGSB双循环厌氧反应器、好氧生物曝气池、二沉池、絮凝沉淀池和中水池；其中，斜筛用于回收秸杆制浆废水中的纤维，中水池内的废水返回制浆车间，初沉池、EGSB双循环厌氧反应器、二沉池和絮凝沉淀池的排泥出口分别与污泥池入口连接，EGSB双循环厌氧反应器的沼气出口与沼气发电机组连接。与现有的秸杆制浆废水处理相比，所述的秸杆制浆废水处理系统能够实现制浆废水的封闭循环再利用，达到污染零排放，节约用水。

Description

秸杆制浆废水处理系统 技术领域
本发明涉及一种秸杆制浆废水处理系统。
背景技术
秸杆制浆废水一般包括蒸煮产生的黑液和漂白产生的中段水，黑液所含的污染物一般占工厂污染排放总量的90％以上，中段水所含的污染物一般占工厂污染排放总量的8-9％。对制浆废水的处理一般有碱回收法、化学絮凝法、生物法等。
发明内容
本发明的目的提供了一种秸杆制浆废水处理系统，以实现废水的循环再利用。
为了解决上述技术问题，本发明提供了如下的技术方案：
秸杆制浆废水处理系统，包括按制浆废水的流向依次连接的斜筛、初沉池、水解酸化池、EGSB双循环厌氧反应器、好氧生物曝气池、二沉池、絮凝沉淀池和中水池，其中，斜筛用于回收秸杆制浆废水中的纤维，中水池内的废水返回制浆车间，初沉池、EGSB双循环厌氧反应器、二沉池和絮凝沉淀池的排泥出口分别与污泥池入口连接，EGSB双循环厌氧反应器的沼气出口与沼气发电机组连接。
进一步，在水解酸化池与EGSB双循环厌氧反应器的管路上串联有热交换器，以使制浆废水与烘缸冷凝水进行热交换。
进一步，污泥池的出口与污泥浓缩池的入口连接，污泥浓缩池的出口与板框压滤机连接。
进一步，所述秸杆制浆废水为黑液和/或中段水。
与现有秸杆制浆废水处理相比，本发明处理系统可以实现制浆废水的封闭循环再利用，达到污染零排放，节约用水。
附图说明
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例一起用于解释本发明，并不构成对本发明的限制。在附图中：
图1是本发明秸杆制浆废水处理系统示意图；
图2是中段水处理系统示意图；
图3是黑液处理系统示意图。
具体实施方式
以下结合附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
如图1所示，本发明的秸杆制浆废水处理系统，包括按制浆废水的流向依次连接的斜筛、初沉池、水解酸化池、EGSB(膨胀颗粒污泥床)双循环厌氧反应器、好氧生物曝气池、二沉池、絮凝沉淀池和中水池，其中，秸杆制浆废水中的纤维被斜筛截留，将截留的纤维送回收浆池，中水池内的废水可返回制浆车间回用，初沉池、EGSB双循环厌氧反应器、二沉池和絮凝沉淀池的排泥出口分别与污泥池入口连接，污泥池的出口与污泥浓缩池的入口连接，污泥浓缩池的出口与板框压滤机连接，EGSB双循环厌氧反应器的沼气出口与沼气发电机组连接，在水解酸化池与EGSB双循环厌氧反应器的管路上可串联热交换器，以使制浆废水与烘缸冷凝水进行热交换。
实施例1
如图2所示，秸杆制浆时漂白产生的废水送中段水池，中段水池溢流废水先经机械格栅拦截一些较大的杂物后进入集水调节池(配有事故排放池，应急备用)，集水调节池中的部分废水可回用于水力碎浆，集水调节池中的另一部分废水用一级提升泵送至斜筛进行过滤，斜筛截留的纤维送至回收浆池回收，经过斜筛的废水进入初沉池进行沉淀，沉淀产 生的污泥排入污泥池，沉淀后的废水送入水解酸化池进行水解酸化，然后由二级提升泵将废水送入热交换器与来自造纸车间的烘缸冷凝水进行热交换，经换热后，再送入EGSB双循环厌氧反应器进行厌氧反应，EGSB双循环厌氧反应器产生的污泥排入污泥池，沼气送沼气发电机组进行发电，废水送好氧生物曝气池进行曝气处理，曝气处理后的废水进入二沉池，二沉池产生的污泥排入污泥池，废水送絮凝沉淀池利用聚合氯化铝(PAC)进行絮凝沉淀，絮凝沉淀产生的污泥排入污泥池，絮凝沉淀后的废水送中水池，中水池中的水部分返回漂白车间回用，也可作为消防用水，另一部分用膜处理系统进行浓度净化后送抄纸机的毛布清洗用水。污泥池中的污泥送污泥浓缩池自然挥发浓缩后，再送入板框压滤机，压成滤饼，可用做生物有机肥。
实施例2
如图3所示，秸杆制浆时蒸煮后提取的高浓黑液先经机械格栅拦截一些较大的杂物后进入集水调节池(配有事故排放池，应急备用)，集水调节池中的黑液用一级提升泵送至斜筛进行过滤，斜筛截留的纤维送至回收浆池回收，经过斜筛的黑液进入初沉池进行沉淀，沉淀产生的污泥排入污泥池，沉淀后的废水送入水解酸化池进行水解酸化，然后由二级提升泵将废水送入热交换器与来自造纸车间的烘缸冷凝水进行热交换，经换热后，再送入EGSB双循环厌氧反应器进行厌氧反应，EGSB双循环厌氧反应器产生的污泥排入污泥池，沼气送沼气发电机组进行发电，废水送好氧生物曝气池进行曝气处理，曝气处理后的废水进入二沉池，二沉池产生的污泥排入污泥池，废水送絮凝沉淀池利用聚合氯化铝(PAC)进行絮凝沉淀，絮凝沉淀产生的污泥排入污泥池，絮凝沉淀后的废水送中水池，中水池中的水返回蒸煮车间作为制浆用水。污泥池中的污泥送污泥浓缩池自然挥发浓缩后，再送入板框压滤机，压成滤饼，可用做生物有机肥。
最后应说明的是：以上所述仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (4)

  1. 秸杆制浆废水处理系统，包括按制浆废水的流向依次连接的斜筛、初沉池、水解酸化池、EGSB双循环厌氧反应器、好氧生物曝气池、二沉池、絮凝沉淀池和中水池，其中，斜筛用于回收秸杆制浆废水中的纤维，中水池内的废水返回制浆车间，初沉池、EGSB双循环厌氧反应器、二沉池和絮凝沉淀池的排泥出口分别与污泥池入口连接，EGSB双循环厌氧反应器的沼气出口与沼气发电机组连接。
  2. 根据权利要求1所述的秸杆制浆废水处理系统，其特征在于，在水解酸化池与EGSB双循环厌氧反应器的管路上串联有热交换器，以使制浆废水与烘缸冷凝水进行热交换。
  3. 根据权利要求1所述的秸杆制浆废水处理系统，其特征在于，污泥池的出口与污泥浓缩池的入口连接，污泥浓缩池的出口与板框压滤机连接。
  4. 根据权利要求1所述的秸杆制浆废水处理系统，其特征在于，所述秸杆制浆废水为黑液和/或中段水。
PCT/CN2016/108920 2016-03-22 2016-12-07 秸杆制浆废水处理系统 WO2017161918A1 (zh)

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CN108017190A (zh) * 2017-10-27 2018-05-11 上海金昌不锈钢管制造有限公司 一种酸水车间污水处理循环系统
CN109437438A (zh) * 2018-12-15 2019-03-08 深圳市凯盛科技工程有限公司 Tft-lcd玻璃减薄废水处理系统
CN109761439A (zh) * 2019-01-23 2019-05-17 陈卫红 造纸污水处理设备及其处理方法
CN110467319A (zh) * 2019-09-05 2019-11-19 山东银鹰化纤有限公司 一种粘胶废水处理工艺
CN110902964A (zh) * 2019-12-11 2020-03-24 成都泰润环境工程有限公司 一种苎麻废水处理工艺及处理系统
CN111573995A (zh) * 2020-06-05 2020-08-25 江西省顺丰纸业有限责任公司 一种造纸用污水回用工艺
CN113666569A (zh) * 2020-05-13 2021-11-19 宣城明佳羽绒有限公司 一种羽毛羽绒加工用高效清洗废水过滤系统
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