CN114212943A - 一种蓝藻无害化资源化处理新工艺 - Google Patents

一种蓝藻无害化资源化处理新工艺 Download PDF

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CN114212943A
CN114212943A CN202111622155.5A CN202111622155A CN114212943A CN 114212943 A CN114212943 A CN 114212943A CN 202111622155 A CN202111622155 A CN 202111622155A CN 114212943 A CN114212943 A CN 114212943A
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龚卫星
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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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
    • 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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

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Abstract

本发明涉及一种蓝藻无害化资源化处理新工艺。该工艺包括：将植物纤维与含有蓝藻的水混合，植物纤维吸附蓝藻和水；将得到的蓝藻混合浆料采用螺杆挤压机挤压，将挤出的含杂质的废水进行水分蒸发；将蒸发的浓缩液和挤压出的纤维混合，干燥，将干燥的物质焚烧，用于产生能源，蒸发的冷凝水可直接排入环境。该工艺采用纯物理的方法处理蓝藻，无需添加任何化学品，不会造成二次污染；综合成本远低于目前各种处理蓝藻的处理成本。

Description

一种蓝藻无害化资源化处理新工艺
技术领域
本发明属于藻类处理技术领域，特别涉及一种蓝藻无害化资源化处理新工艺。
背景技术
技术人员围绕如下四个方向开展研究：
Figure RE-GDA0003493207180000011
在物理湖泊学领域主要从事太湖平原河网地区的大型浅水湖泊的湖流、波浪等水动力过程 的数值模拟，浅水湖泊的水下光场特征研究以及风对浪、流的影响，水下光场受风、浪、流、 水华等的影响机制研究。
Figure BDA0003437876940000012
在湖泊界面环境化学领域，主要开展湖泊沉积的环境记录、沉积物内源污染规律、生态疏 浚等工作；进行大气污染对湖泊的贡献、浅水湖泊对全球碳循环的贡献等研究。
Figure BDA0003437876940000013
在湖泊生物生态学方向，主要从事大型浅水湖泊的生态***演替规律研究、蓝藻水华暴发 机制研究、生态渔业研究、湖泊健康生态***的评估与保护理论研究等。
Figure BDA0003437876940000014
在湖泊生态修复的理论与技术研究主要从事湖泊富营养化控制、蓝藻水华防治、生态修复 等方面的理论和技术研究。
但是目前还没有无害化处理蓝藻的一揽子工艺，因此研究蓝藻无害化资源化处理是非常 有意义的。
发明内容
本发明所要解决的技术问题是提供一种蓝藻无害化资源化处理新工艺，以克服现有技术 中蓝藻处理会造成二次污染的缺陷。
本发明提供一种蓝藻无害化资源化处理新工艺，包括如下步骤：
(1)将植物纤维与含有蓝藻的水混合，植物纤维吸附蓝藻和水，得到蓝藻混合浆料；
(2)将步骤(1)中蓝藻混合浆料采用螺杆挤压机挤压，利用植物纤维的毛刺刺破蓝藻的细 胞使蓝藻水分挤出；
(3)将步骤(2)中挤出的含杂质的废水进行水分蒸发；
(4)将步骤(3)中蒸发的浓缩液和步骤(2)中挤压出的纤维混合，干燥，将干燥的物质焚 烧，用于产生能源。
优选地，所述步骤(1)中植物纤维为：采用树枝、庄稼秸秆打碎的植物纤维。
优选地，所述步骤(1)中植物纤维与含有蓝藻的水混合的比例为1立方植物纤维与1立 方蓝藻水混合(取决于纤维的干度和细度可以调整)。
优选地，所述步骤(1)中混合时间为2-8分钟。
优选地，所述步骤(2)中采用螺杆挤压机挤压是在常温下。
优选地，所述步骤(3)中水分蒸发是采用MVR蒸发器蒸发。MVR蒸发器采用机械蒸汽再压缩(MVR–Mechanical Vapor Re-compressor)技术。该技术的主要特点是无需额外蒸汽将废水中的水分蒸发，冷凝后成为干净的蒸馏冷凝水，返回环境中。
优选地，所述步骤(3)中，蒸发温度为70-80℃(考虑废水的结垢特性，优化了蒸发温 度)，压力为312-474毫巴。可以将90％以上的水分蒸发。
优选地，所述步骤(3)中蒸发产生的蒸馏冷凝水可以达标，返回环境中(例如湖中)。
优选地，所述步骤(4)中干燥是采用气流干燥。
优选地，所述步骤(4)中将干燥的物质焚烧是将干燥的物质送到焚烧装置焚烧。
有益效果
(1)本发明采用纯物理的方法处理蓝藻，无需添加任何化学品，不会造成二次污染；
(2)采用植物纤维作为介质吸收蓝藻，成本低；
(3)冷凝水可以无害地返回环境；
(4)干燥后的蓝藻纤维混合作为燃料，进一步利用产生能源；
(5)综合成本远低于目前各种处理蓝藻的处理成本。
附图说明
图1为本发明蓝藻无害化资源化处理工艺流程图。
具体实施方式
下面结合具体实施例，进一步阐述本发明。应理解，这些实施例仅用于说明本发明而不 用于限制本发明的范围。此外应理解，在阅读了本发明讲授的内容之后，本领域技术人员可 以对本发明作各种改动或修改，这些等价形式同样落于本申请所附权利要求书所限定的范围。
实施例1
(1)将破碎的植物纤维(一立方)用绞龙输送至蓝藻(一立方)的储罐，采用搅拌器进 行混合，干燥的细纤维迅速吸收水分和蓝藻，通常只需要2-8分钟，得到蓝藻混合浆料；
(2)常温下将步骤(1)中蓝藻混合浆料采用螺杆泵输送至螺杆挤压机，挤压过程中， 利用植物纤维的毛针刺破蓝藻的细胞，可以将蓝藻中的水分充分地挤出，成为含有少量的杂 质的废水；
(3)将步骤(2)中挤出的含杂质的废水用离心泵送入蒸发***，蒸发温度为80℃(压 力473毫巴)。可以将90％以上的水分蒸发。蒸发器采用机械蒸汽再压缩(MVR–Mechanical Vapor Re-compressor)技术。该技术的主要特点是无需额外蒸汽将废水中的水分蒸发，冷凝后 成为干净的蒸馏冷凝水(冷凝水中COD/BOD的指标低于原湖水的数值)，返回环境中；
(4)将步骤(3)中蒸发后的浓缩废液和步骤(2)中挤压出的纤维采用螺杆混合机，输 送至气流干燥器，将纤维蓝藻混合物进行干燥。干燥的物质(实际上90％以上是植物，如木 屑，接近原植物的热值)送到焚烧装置，用于产生能源。

Claims (7)

1.一种蓝藻无害化资源化处理新工艺，包括如下步骤：
(1)将植物纤维与含有蓝藻的水混合，植物纤维吸附蓝藻和水，得到蓝藻混合浆料；
(2)将步骤(1)中蓝藻混合浆料采用螺杆挤压机挤压，利用植物纤维的毛刺刺破蓝藻的细胞使蓝藻水分充分挤出；
(3)将步骤(2)中挤出的含杂质的废水进行水分蒸发；
(4)将步骤(3)中蒸发的浓缩液和步骤(2)中挤压出的纤维混合，干燥，将干燥的物质焚烧，用于产生能源。
2.根据权利要求1所述的工艺，其特征在于，所述步骤(1)中植物纤维为：采用树枝、庄稼秸秆打碎的植物纤维。
3.根据权利要求1所述的工艺，其特征在于，所述步骤(1)中植物纤维与含有蓝藻的水混合，混合的比例为一立方植物纤维与一吨蓝藻水；混合时间为2-8分钟。
4.根据权利要求1所述的工艺，其特征在于，所述步骤(2)中采用螺杆挤压机挤压是在常温下。
5.根据权利要求1所述的工艺，其特征在于，所述步骤(3)中水分蒸发是采用MVR蒸发器蒸发，无需蒸汽加热；蒸发温度为70-80℃，压力为312-474毫巴。
6.根据权利要求1所述的工艺，其特征在于，所述步骤(3)中蒸发产生的蒸馏冷凝水可以达标，返回环境中。
7.根据权利要求1所述的工艺，其特征在于，所述步骤(4)中干燥是采用气流干燥。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102210476A (zh) * 2010-12-23 2011-10-12 中国科学院南京地理与湖泊研究所 一种快速干燥蓝藻的方法
CN109336360A (zh) * 2018-11-08 2019-02-15 江苏省农业科学院 蓝藻深度脱水方法及其发电能源化方法
CN209210560U (zh) * 2018-11-19 2019-08-06 深圳市绿得宝保健食品有限公司 一种藻类养殖废水处理和回收装置
CN112174467A (zh) * 2020-09-04 2021-01-05 无锡国联环保科技股份有限公司 一种蓝藻藻泥资源化处理方法
CN113603333A (zh) * 2021-08-11 2021-11-05 江苏霖生生态环境科技有限公司 一种生物炭基材料介导蓝藻泥深度干化设备及工艺技术及工艺

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102210476A (zh) * 2010-12-23 2011-10-12 中国科学院南京地理与湖泊研究所 一种快速干燥蓝藻的方法
CN109336360A (zh) * 2018-11-08 2019-02-15 江苏省农业科学院 蓝藻深度脱水方法及其发电能源化方法
CN209210560U (zh) * 2018-11-19 2019-08-06 深圳市绿得宝保健食品有限公司 一种藻类养殖废水处理和回收装置
CN112174467A (zh) * 2020-09-04 2021-01-05 无锡国联环保科技股份有限公司 一种蓝藻藻泥资源化处理方法
CN113603333A (zh) * 2021-08-11 2021-11-05 江苏霖生生态环境科技有限公司 一种生物炭基材料介导蓝藻泥深度干化设备及工艺技术及工艺

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