CN105952572A - Urban sewage power generation system - Google Patents

Urban sewage power generation system Download PDF

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Publication number
CN105952572A
CN105952572A CN201610443775.5A CN201610443775A CN105952572A CN 105952572 A CN105952572 A CN 105952572A CN 201610443775 A CN201610443775 A CN 201610443775A CN 105952572 A CN105952572 A CN 105952572A
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tank
pool
sewage
power generation
water inlet
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陈雷
陈国初
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Shanghai Dianji University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

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

Abstract

本发明涉及一种城市污水发电系统,包括污水收集系统、污水处理系统、发电系统与排放系统:所述污水处理系统包括一级处理单元、二级处理单元与三级处理单元,所述一级处理单元包括过滤池与沉淀池,所述过滤池的进水口连接污水收集系统的出水口,所述沉淀池的进水口连接过滤池的出水口,所述二级处理单元为降解池,所述降解池的进水口连接沉淀池的出水口,所述三级处理单元包括化学分离池与物理分离池,所述化学分离池的进水口连接降解池的出水口,所述物理分离池的进水口连接化学分离池的进水口;所述发电系统包括上池、下池与水力发电机。

The invention relates to an urban sewage power generation system, including a sewage collection system, a sewage treatment system, a power generation system and a discharge system: the sewage treatment system includes a primary treatment unit, a secondary treatment unit and a tertiary treatment unit, the primary The treatment unit includes a filter tank and a sedimentation tank, the water inlet of the filter tank is connected to the water outlet of the sewage collection system, the water inlet of the sedimentation tank is connected to the water outlet of the filter tank, the secondary treatment unit is a degradation tank, and the The water inlet of the degradation tank is connected to the water outlet of the sedimentation tank, and the tertiary treatment unit includes a chemical separation tank and a physical separation tank, the water inlet of the chemical separation tank is connected to the water outlet of the degradation tank, and the water inlet of the physical separation tank is It is connected to the water inlet of the chemical separation pool; the power generation system includes an upper pool, a lower pool and a hydroelectric generator.

Description

一种城市污水发电系统An urban sewage power generation system

技术领域technical field

本发明涉及水力发电的应用领域,具体提供了一种城市污水发电系统。The invention relates to the application field of hydroelectric power generation, and specifically provides an urban sewage power generation system.

背景技术Background technique

污水处理是指为了使排放的水源的水质要求达到排放标准,从而对污水进行净化的过程。随着经济的发展,城镇数量也越来越多,城市污水也随之增多,而现在污水处理厂通过简单的净化之后,一部分被直接利用或直接送入自来水厂,而大部分会直接排放到河流中,这样的方式具有以下缺陷:污水处理厂通过简单的净化后直接利用,这样的方式对于污水的处理并不彻底,这样处理之后会增加自来水厂的生产成本,且排放至河流中的水对于环境也具有不良影响;污水处理厂在污水进行处理之后,只是对一部分污水进行利用,对于资源的浪费十分严重。Sewage treatment refers to the process of purifying sewage in order to make the water quality requirements of the discharged water sources meet the discharge standards. With the development of the economy, the number of cities and towns is increasing, and the urban sewage is also increasing. Now, after simple purification in the sewage treatment plant, part of it is directly used or sent to the water plant, and most of it will be directly discharged to the water supply plant. In the river, this method has the following disadvantages: the sewage treatment plant directly uses it after simple purification, and this method does not treat the sewage thoroughly, which will increase the production cost of the water plant after treatment, and the water discharged into the river It also has adverse effects on the environment; the sewage treatment plant only utilizes part of the sewage after the sewage is treated, which is a serious waste of resources.

随着经济的发展,我国正处于高速发展的道路上,电作为生产基础之一,在经济发展中扮演着不可或缺的角色,国家对于电力也十分的重视,现有的水力发电需要修建堤坝,这样的方式不仅破坏生态,而且影响当地居民的生产生活,基础建设投资过大,另外,在降水少的季节时,发电量少且设置停止发电,因此,如何对污水进行深度净化与对水资源的进一步利用并产生电力,是本领域技术人员值得深思的问题。With the development of the economy, our country is on the road of rapid development. As one of the production bases, electricity plays an indispensable role in economic development. The country also attaches great importance to electricity. The existing hydropower generation needs to build dams , this method not only destroys the ecology, but also affects the production and life of local residents. The investment in infrastructure construction is too large. In addition, in seasons with little precipitation, the power generation is small and the power generation is set to stop. Therefore, how to deeply purify sewage and water The further utilization of resources and the generation of electricity are issues worthy of deep consideration by those skilled in the art.

发明内容Contents of the invention

本发明的目的是提供一种城市污水发电系统,用于对污水的进一步处理,在污水处理的排放的过程中,充分利用排放过程中,完成水力发电。The purpose of the present invention is to provide an urban sewage power generation system for further treatment of sewage, in the discharge process of sewage treatment, fully utilize the discharge process to complete hydropower generation.

本发明为解决其技术问题所采用的技术方案是,The technical scheme that the present invention adopts for solving its technical problem is,

一种城市污水发电系统,其特征在于:包括污水收集系统、污水处理系统、发电系统与排放系统:An urban sewage power generation system is characterized in that it includes a sewage collection system, a sewage treatment system, a power generation system and a discharge system:

所述污水处理系统包括一级处理单元、二级处理单元与三级处理单元,所述一级处理单元包括过滤池与沉淀池,所述过滤池的进水口连接污水收集系统的出水口,所述沉淀池的进水口连接过滤池的出水口,所述二级处理单元为降解池,所述降解池的进水口连接沉淀池的出水口,所述三级处理单元包括化学分离池与物理分离池,所述化学分离池的进水口连接降解池的出水口,所述物理分离池的进水口连接化学分离池的进水口;The sewage treatment system includes a primary treatment unit, a secondary treatment unit, and a tertiary treatment unit. The primary treatment unit includes a filter tank and a sedimentation tank. The water inlet of the filter tank is connected to the water outlet of the sewage collection system. The water inlet of the sedimentation tank is connected to the water outlet of the filter tank, the secondary treatment unit is a degradation tank, the water inlet of the degradation tank is connected to the water outlet of the sedimentation tank, and the tertiary treatment unit includes a chemical separation tank and a physical separation tank. pool, the water inlet of the chemical separation tank is connected to the water outlet of the degradation tank, and the water inlet of the physical separation tank is connected to the water inlet of the chemical separation tank;

所述发电系统包括上池、下池与水力发电机,所述上池内部设置有抽水装置,所述抽水装置通过引水管与下池相连接,所述水力发电机设置于上池与下池之间,且水力发电机两端分别与上池和下池相连接,所述下池一侧与所述物理分离池相连接,所述下池前端还设置有过滤管,所述过滤管连接于下池的出水口;The power generation system includes an upper pool, a lower pool, and a hydroelectric generator. A pumping device is provided inside the upper pool, and the pumping device is connected to the lower pool through a water diversion pipe. The hydroelectric generator is arranged between the upper pool and the lower pool. And the two ends of the hydroelectric generator are respectively connected to the upper pool and the lower pool, one side of the lower pool is connected to the physical separation pool, and the front end of the lower pool is also provided with a filter tube, and the filter tube is connected to the water outlet of the lower pool;

进一步的,所述过滤池内部设置有格栅栏与筛网,所述格栅栏设置于筛网上端;Further, the inside of the filter tank is provided with a grid fence and a screen, and the grid fence is arranged on the top of the screen;

进一步的,所述物理分离池内部设置有活性炭吸附罐;Further, an activated carbon adsorption tank is arranged inside the physical separation tank;

进一步的,所述过滤管内部设置有活性炭吸附罐;Further, an activated carbon adsorption tank is arranged inside the filter tube;

本发明的优点在于,The advantage of the present invention is that,

1、该种城市污水发电系统采用污水处理系统的设计,所述污水处理系统包括一级处理单元、二级处理单元与三级处理单元,所述一级处理单元包括过滤池与沉淀池,所述过滤池的进水口连接污水收集系统的出水口,所述沉淀池的进水口连接过滤池的出水口,所述二级处理单元为降解池,所述降解池的进水口连接沉淀池的出水口,所述三级处理单元包括化学分离池与物理分离池,所述化学分离池的进水口连接降解池的出水口,所述物理分离池的进水口连接化学分离池的进水口,大大提高了污水的净化效果,有利于节约自来水厂的后期净化成本,同时由于排放到河流中的水的净化程度提高了,有利于保护环境;1. This kind of urban sewage power generation system adopts the design of a sewage treatment system. The sewage treatment system includes a primary treatment unit, a secondary treatment unit, and a tertiary treatment unit. The primary treatment unit includes a filter tank and a sedimentation tank. The water inlet of the filter tank is connected to the water outlet of the sewage collection system, the water inlet of the sedimentation tank is connected to the water outlet of the filter tank, the secondary treatment unit is a degradation tank, and the water inlet of the degradation tank is connected to the outlet of the sedimentation tank water outlet, the three-level treatment unit includes a chemical separation tank and a physical separation tank, the water inlet of the chemical separation tank is connected to the water outlet of the degradation tank, and the water inlet of the physical separation tank is connected to the water inlet of the chemical separation tank, which greatly improves Improve the purification effect of sewage, which is beneficial to save the later purification cost of the waterworks, and at the same time, because the purification degree of the water discharged into the river is improved, it is beneficial to protect the environment;

2、该种城市污水发电系统采用发电系统的设计,所述发电系统包括上池、下池与水力发电机,所述上池内部设置有抽水装置,所述抽水装置通过引水管与下池相连接,所述水力发电机设置于上池与下池之间,且水力发电机两端分别与上池和下池相连接,所述下池一侧与所述物理分离池相连接,所述下池前端还设置有过滤管,所述过滤管连接于下池的出水口,通过在水资源的排放过程中的充分利用,完成水力发电,不仅可以满足污水处理厂的自给自足,节约成本,同时,水力发电所产生的电力可以供给小范围用电需求,另外,可以将多余的电力并入国家电网,有利于促进经济发展。2. This kind of urban sewage power generation system adopts the design of a power generation system. The power generation system includes an upper pool, a lower pool and a hydroelectric generator. A pumping device is installed inside the upper pool, and the pumping device is connected to the lower pool through a water diversion pipe. The hydroelectric generator is arranged between the upper pool and the lower pool, and the two ends of the hydroelectric generator are respectively connected with the upper pool and the lower pool, one side of the lower pool is connected with the physical separation pool, and the front end of the lower pool is also provided with a The filter pipe, which is connected to the water outlet of the lower pool, completes hydropower generation through full utilization of water resources in the discharge process, which can not only meet the self-sufficiency of the sewage treatment plant and save costs, but at the same time, the hydropower generated Electricity can supply small-scale electricity demand. In addition, excess electricity can be incorporated into the national grid, which is conducive to promoting economic development.

附图说明Description of drawings

图1是本发明提出的城市污水发电系统的工作流程图;Fig. 1 is the work flowchart of the urban sewage power generation system that the present invention proposes;

图2是本发明提出的污水处理系统的工作流程图;Fig. 2 is the work flowchart of the sewage treatment system that the present invention proposes;

图3是本发明提出的发电系统的工作流程图;Fig. 3 is the work flowchart of the power generation system that the present invention proposes;

具体实施方式detailed description

为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解,下面结合图示与具体实施例,进一步阐述本发明。In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below in conjunction with illustrations and specific embodiments.

如图1至图3所示,本发明提出的城市污水发电系统,其特征在于:包括污水收集系统、污水处理系统、发电系统与排放系统:As shown in Figures 1 to 3, the urban sewage power generation system proposed by the present invention is characterized in that it includes a sewage collection system, a sewage treatment system, a power generation system and a discharge system:

所述污水处理系统包括一级处理单元、二级处理单元与三级处理单元,所述一级处理单元包括过滤池与沉淀池,所述过滤池的进水口连接污水收集系统的出水口,所述沉淀池的进水口连接过滤池的出水口,所述二级处理单元为降解池,所述降解池的进水口连接沉淀池的出水口,所述三级处理单元包括化学分离池与物理分离池,所述化学分离池的进水口连接降解池的出水口,所述物理分离池的进水口连接化学分离池的进水口;The sewage treatment system includes a primary treatment unit, a secondary treatment unit, and a tertiary treatment unit. The primary treatment unit includes a filter tank and a sedimentation tank. The water inlet of the filter tank is connected to the water outlet of the sewage collection system. The water inlet of the sedimentation tank is connected to the water outlet of the filter tank, the secondary treatment unit is a degradation tank, the water inlet of the degradation tank is connected to the water outlet of the sedimentation tank, and the tertiary treatment unit includes a chemical separation tank and a physical separation tank. pool, the water inlet of the chemical separation tank is connected to the water outlet of the degradation tank, and the water inlet of the physical separation tank is connected to the water inlet of the chemical separation tank;

所述发电系统包括上池、下池与水力发电机,所述上池内部设置有抽水装置,所述抽水装置通过引水管与下池相连接,所述水力发电机设置于上池与下池之间,且水力发电机两端分别与上池和下池相连接,所述下池一侧与所述物理分离池相连接,所述下池前端还设置有过滤管,所述过滤管连接于下池的出水口;The power generation system includes an upper pool, a lower pool, and a hydroelectric generator. A pumping device is provided inside the upper pool, and the pumping device is connected to the lower pool through a water diversion pipe. The hydroelectric generator is arranged between the upper pool and the lower pool. And the two ends of the hydroelectric generator are respectively connected to the upper pool and the lower pool, one side of the lower pool is connected to the physical separation pool, and the front end of the lower pool is also provided with a filter tube, and the filter tube is connected to the water outlet of the lower pool;

进一步的,所述过滤池内部设置有格栅栏与筛网,所述格栅栏设置于筛网上端;Further, the inside of the filter tank is provided with a grid fence and a screen, and the grid fence is arranged on the top of the screen;

进一步的,所述物理分离池内部设置有活性炭吸附罐;Further, an activated carbon adsorption tank is arranged inside the physical separation tank;

进一步的,所述过滤管内部设置有活性炭吸附罐;Further, an activated carbon adsorption tank is arranged inside the filter tube;

本发明的工作原理如下:The working principle of the present invention is as follows:

参照图1,通过污水收集系统将各类污水汇聚到污水处理厂,完成污水的收集,然后通过污水处理系统完成污水的处理,处理完毕之后排放,在排放的过程中通过发电系统完成水力发电,产生的电力用于污水厂的自给自足,同时供给个小范围用电与并入国家电网,最后,通过排放系统将污水汇入河流中;Referring to Figure 1, all kinds of sewage are gathered to the sewage treatment plant through the sewage collection system to complete the collection of sewage, and then the sewage treatment is completed through the sewage treatment system, and then discharged after the treatment is completed. During the discharge process, hydroelectric power generation is completed through the power generation system. The generated electricity is used for the self-sufficiency of the sewage plant, and at the same time supplies a small area of electricity and is incorporated into the national grid. Finally, the sewage is poured into the river through the drainage system;

参照图2,该种城市污水发电系统采用污水处理系统的设计,所述污水处理系统包括一级处理单元、二级处理单元与三级处理单元,所述一级处理单元包括过滤池与沉淀池,所述过滤池的进水口连接污水收集系统的出水口,所述沉淀池的进水口连接过滤池的出水口,所述二级处理单元为降解池,所述降解池的进水口连接沉淀池的出水口,所述三级处理单元包括化学分离池与物理分离池,所述化学分离池的进水口连接降解池的出水口,所述物理分离池的进水口连接化学分离池的进水口,大大提高了污水的净化效果,有利于节约自来水厂的后期净化成本,同时由于排放到河流中的水的净化程度提高了,有利于保护环境;Referring to Figure 2, this kind of urban sewage power generation system adopts the design of a sewage treatment system. The sewage treatment system includes a primary treatment unit, a secondary treatment unit, and a tertiary treatment unit. The primary treatment unit includes a filter tank and a sedimentation tank. , the water inlet of the filter tank is connected to the water outlet of the sewage collection system, the water inlet of the sedimentation tank is connected to the water outlet of the filter tank, the secondary treatment unit is a degradation tank, and the water inlet of the degradation tank is connected to the sedimentation tank The water outlet of the tertiary treatment unit includes a chemical separation tank and a physical separation tank, the water inlet of the chemical separation tank is connected to the water outlet of the degradation tank, and the water inlet of the physical separation tank is connected to the water inlet of the chemical separation tank, It greatly improves the purification effect of sewage, which is beneficial to save the later purification cost of the waterworks, and at the same time, because the purification degree of the water discharged into the river is improved, it is beneficial to protect the environment;

参照图3,该种城市污水发电系统采用发电系统的设计,所述发电系统包括上池、下池与水力发电机,所述上池内部设置有抽水装置,所述抽水装置通过引水管与下池相连接,所述水力发电机设置于上池与下池之间,且水力发电机两端分别与上池和下池相连接,所述下池一侧与所述物理分离池相连接,所述下池前端还设置有过滤管,所述过滤管连接于下池的出水口,通过在水资源的排放过程中的充分利用,完成水力发电,不仅可以满足污水处理厂的自给自足,节约成本,同时,水力发电所产生的电力可以供给小范围用电需求,另外,可以将多余的电力并入国家电网,有利于促进经济发展。Referring to Figure 3, this kind of urban sewage power generation system adopts the design of a power generation system. The power generation system includes an upper pool, a lower pool and a hydroelectric generator. A pumping device is arranged inside the upper pool, and the pumping device is connected to the lower pool through a water diversion pipe. connected, the hydroelectric generator is set between the upper pool and the lower pool, and the two ends of the hydroelectric generator are respectively connected with the upper pool and the lower pool, one side of the lower pool is connected with the physical separation pool, and the front end of the lower pool is also A filter tube is provided, and the filter tube is connected to the water outlet of the lower pool. By making full use of the water resources in the discharge process, hydroelectric power generation can be completed, which can not only meet the self-sufficiency of the sewage treatment plant and save costs, but also the hydropower plant The generated electricity can supply small-scale electricity demand. In addition, the excess electricity can be incorporated into the national grid, which is conducive to promoting economic development.

以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等同物界定。The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and that described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention also has various aspects without departing from the spirit and scope of the present invention. Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1.一种城市污水发电系统,其特征在于:包括污水收集系统、污水处理系统、发电系统与排放系统:1. A city sewage power generation system, characterized in that it comprises a sewage collection system, a sewage treatment system, a power generation system and a discharge system: 所述污水处理系统包括一级处理单元、二级处理单元与三级处理单元,所述一级处理单元包括过滤池与沉淀池,所述过滤池的进水口连接污水收集系统的出水口,所述沉淀池的进水口连接过滤池的出水口,所述二级处理单元为降解池,所述降解池的进水口连接沉淀池的出水口,所述三级处理单元包括化学分离池与物理分离池,所述化学分离池的进水口连接降解池的出水口,所述物理分离池的进水口连接化学分离池的进水口;The sewage treatment system includes a primary treatment unit, a secondary treatment unit, and a tertiary treatment unit. The primary treatment unit includes a filter tank and a sedimentation tank. The water inlet of the filter tank is connected to the water outlet of the sewage collection system. The water inlet of the sedimentation tank is connected to the water outlet of the filter tank, the secondary treatment unit is a degradation tank, the water inlet of the degradation tank is connected to the water outlet of the sedimentation tank, and the tertiary treatment unit includes a chemical separation tank and a physical separation tank. pool, the water inlet of the chemical separation tank is connected to the water outlet of the degradation tank, and the water inlet of the physical separation tank is connected to the water inlet of the chemical separation tank; 所述发电系统包括上池、下池与水力发电机,所述上池内部设置有抽水装置,所述抽水装置通过引水管与下池相连接,所述水力发电机设置于上池与下池之间,且水力发电机两端分别与上池和下池相连接,所述下池一侧与所述物理分离池相连接,所述下池前端还设置有过滤管,所述过滤管连接于下池的出水口。The power generation system includes an upper pool, a lower pool, and a hydroelectric generator. A pumping device is provided inside the upper pool, and the pumping device is connected to the lower pool through a water diversion pipe. The hydroelectric generator is arranged between the upper pool and the lower pool. The two ends of the hydroelectric generator are respectively connected to the upper pool and the lower pool, one side of the lower pool is connected to the physical separation pool, and a filter tube is arranged at the front end of the lower pool, and the filter tube is connected to the water outlet of the lower pool. 2.根据权利要求1所述的一种城市污水发电系统,其特征在于:所述过滤池内部设置有格栅栏与筛网,所述格栅栏设置于筛网上端。2 . The urban sewage power generation system according to claim 1 , characterized in that: a grid fence and a screen are arranged inside the filter tank, and the grid fence is arranged on the upper end of the screen. 3 . 3.根据权利要求1所述的一种城市污水发电系统,其特征在于:所述物理分离池内部设置有活性炭吸附罐。3. The urban sewage power generation system according to claim 1, characterized in that: an activated carbon adsorption tank is arranged inside the physical separation tank. 4.根据权利要求1所述的一种城市污水发电系统,其特征在于:所述过滤管内部设置有活性炭吸附罐。4. The urban sewage power generation system according to claim 1, characterized in that: an activated carbon adsorption tank is arranged inside the filter tube.
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