CN111635098A - Concrete batching plant wastewater zero discharge process - Google Patents

Concrete batching plant wastewater zero discharge process Download PDF

Info

Publication number
CN111635098A
CN111635098A CN202010521626.2A CN202010521626A CN111635098A CN 111635098 A CN111635098 A CN 111635098A CN 202010521626 A CN202010521626 A CN 202010521626A CN 111635098 A CN111635098 A CN 111635098A
Authority
CN
China
Prior art keywords
slurry
particle size
waste water
wastewater
concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010521626.2A
Other languages
Chinese (zh)
Inventor
高根树
奚新新
李栋
黄忠华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangxi Guangyu Water Resources Technology Development Co ltd
Central South University
China Resources Concrete Guangxi Ltd
Original Assignee
Guangxi Guangyu Water Resources Technology Development Co ltd
Central South University
China Resources Concrete Guangxi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangxi Guangyu Water Resources Technology Development Co ltd, Central South University, China Resources Concrete Guangxi Ltd filed Critical Guangxi Guangyu Water Resources Technology Development Co ltd
Priority to CN202010521626.2A priority Critical patent/CN111635098A/en
Publication of CN111635098A publication Critical patent/CN111635098A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • 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
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

本发明提出了一种混凝土搅拌站废水零排放处理工艺,属于工业废水物理处理领域。主要解决站域内含混凝土颗粒废水排放、站内粉尘飞扬、泥浆涂地面大、洗泵车废水分散处理的问题。它以真空收集系统收集站内分散的泥浆、砂浆、雨污,集中后通过渣浆泵提升,先采用碟片筛分离粗砂砾,回收骨料,再进行离心分离,分离中细砂、泥,最后经过刚性膜过滤,即时得到清水,进入循环使用;离心分离后的浓缩泥浆就近压滤,输出泥饼。本发明解决了高浓度、大颗粒悬浮物快速输送收集问题,规避了沟、管路的淤积、结壳、堵塞,消除了泥浆外露现象,直接输出固形泥饼,可大幅度提升搅拌站资源循环利用与生态文明水平。本发明用于混凝土搅拌站废水处理。

Figure 202010521626

The invention provides a zero-discharge treatment process for waste water in a concrete mixing station, which belongs to the field of physical treatment of industrial waste water. It mainly solves the problems of discharge of wastewater containing concrete particles in the station area, flying dust in the station, large mud coating on the ground, and decentralized treatment of wastewater from pump washing vehicles. It collects the dispersed mud, mortar and rain sewage in the station with a vacuum collection system. After being concentrated, it is lifted by a slurry pump. First, the disc screen is used to separate the coarse sand and gravel, and the aggregate is recovered, and then centrifugal separation is performed to separate the medium and fine sand and mud. Finally, After rigid membrane filtration, clean water can be obtained immediately, which can be recycled and used; the concentrated mud after centrifugal separation is press-filtered nearby, and the mud cake is output. The invention solves the problem of rapid transportation and collection of high-concentration and large-particle suspended matter, avoids the deposition, crusting and blockage of trenches and pipelines, eliminates the phenomenon of mud exposure, directly outputs solid mud cake, and can greatly improve the resource circulation of the mixing station Utilization and ecological civilization level. The invention is used for waste water treatment of concrete mixing station.

Figure 202010521626

Description

混凝土搅拌站废水零排放工艺Concrete batching plant wastewater zero discharge process

技术领域technical field

本发明涉及混凝土工业、材料中间处理场场地废水与粉尘治理领域,具体地,涉及一种废水零排放工艺。The invention relates to the field of waste water and dust treatment in the concrete industry and material intermediate treatment sites, in particular to a process for zero discharge of waste water.

背景技术Background technique

以混凝土搅拌站为代表的原材料加工工厂,一方面伴随大量物流、料流的出入,存在车辆卸料、堆料、物料加工、专用车辆比如泵车残余料清洗、车辆出入、场地泥泞、粉尘飞扬、雨污排泄大量悬浮物的问题。高浓度悬浮物废水排放导致沟、水道淤积十分严重,是以混凝土搅拌站为代表的物料加工厂的中心环保问题。其次,混凝土搅拌站内景观不良,泥浆涂地面积大,跨越时段长,废水中所含骨料需要回收,也是搅拌站的内在发展需求。Raw material processing plants represented by concrete batching plants, on the one hand, accompanied by a large number of logistics and material flow in and out, there are vehicle unloading, stockpiling, material processing, special vehicles such as pump truck residual material cleaning, vehicle entry and exit, site muddy, dust flying , the problem of rain and sewage excreting a large amount of suspended solids. The discharge of high-concentration suspended solids wastewater leads to serious siltation in ditches and waterways, which is the central environmental protection problem of material processing plants represented by concrete batching plants. Secondly, the landscape in the concrete mixing plant is poor, the mud coating area is large, and the spanning period is long. The aggregate contained in the wastewater needs to be recycled, which is also the inherent development demand of the mixing plant.

通常混凝土搅拌站内配置了振动筛或者滚筒筛处理混凝土泵车洗车废水,回收部分骨料,筛余泥浆进入沉淀池,再泵送至板框压滤机压滤出泥饼。泥浆在二次输送给板框压滤之前,存在沉淀池粗颗粒物自然沉降板结,经常需要铲车挖掘,让泥浆沥水、晾晒。Usually, a vibrating screen or a drum screen is installed in the concrete mixing station to treat the waste water of the concrete pump truck, and part of the aggregate is recovered. Before the mud is transported to the plate and frame for pressure filtration, the coarse particles in the sedimentation tank will naturally settle and harden, and it is often necessary to excavate with a forklift to allow the mud to drain and dry.

搅拌站场地普遍平整,排水沟放坡不足以避免大量沉积。由于混凝土的特性,输送水沟淤积、管道堵塞频繁发生。The site of the batching plant is generally flat, and the slope of the drainage ditch is not enough to avoid a large amount of sedimentation. Due to the characteristics of concrete, siltation of conveying ditches and blockage of pipelines occur frequently.

随着环保、生态理念的深入,混凝土搅拌站高浓度悬浮物废水向厂外排放逐渐纳入污水处理监督范围,循环利用日益成为大趋势。With the deepening of environmental protection and ecological concepts, the discharge of high-concentration suspended solids wastewater from concrete batching plants to outside the plant has gradually been included in the scope of sewage treatment supervision, and recycling has increasingly become a major trend.

从循环利用的角度,废水的均质化、稳定化是技术关键,目前源于废水的泥浆浓度、总量波动大,存在影响折减混凝土强度与使流动性失控的问题。From the perspective of recycling, the homogenization and stabilization of wastewater is the key to technology. At present, the concentration and total amount of mud derived from wastewater fluctuate greatly, which affects the reduction of concrete strength and makes the fluidity out of control.

发明内容SUMMARY OF THE INVENTION

本发明的目的是为了系统地解决混凝土搅拌站高浓度悬浮物废水零排放的问题、解决场地景观不良、作业环境质量差,以及废水循环利用的问题。The purpose of the present invention is to systematically solve the problem of zero discharge of high-concentration suspended solids waste water in concrete batching plants, to solve the problems of poor site landscape, poor working environment quality, and waste water recycling.

为了实现上述目的,本发明提供一种混凝土搅拌站废水零排放处理工艺,用于混凝土搅拌站厂域废水处理,其特征是,它包括雨水污水处理、场地清洗废水处理、混凝土泵车洗车废水处理、和/或轮胎清洗废水、和/或混凝土检验废水处理、和/或生活污水处理六个部分。除生活污水处理以外,其余各个分部废水处理,均采用分散收集废水、再进行集中处理的总体工艺。In order to achieve the above purpose, the present invention provides a zero-discharge treatment process for waste water from a concrete mixing station, which is used for the treatment of waste water in a concrete mixing station. , and/or tire washing wastewater, and/or concrete inspection wastewater treatment, and/or domestic sewage treatment six parts. Except for domestic sewage treatment, the wastewater treatment of other branches adopts the overall process of scattered collection of wastewater and then centralized treatment.

所述分散收集废水方式为真空收集,和/或渣浆泵输送。所述集中处理依次包含碟片筛粗分离、立式离心机细分离、和/或刚性膜过滤分离、和压滤器压滤泥饼过程。The method for dispersing and collecting wastewater is vacuum collection and/or slurry pump delivery. The centralized treatment sequentially includes a disc sieve coarse separation, a vertical centrifuge fine separation, and/or a rigid membrane filtration separation, and a filter press filter cake process.

所述真空收集方式为:The vacuum collection method is:

第一步,在厂域多点、分散布置真空收集井,污水用来收集厂域雨水污水、场地清洗废水、或者混凝土检验废水,在所述井内插入收集管,连接自动阀门,用就地控制箱按照渣浆料位来控制阀门启闭。The first step is to arrange multiple vacuum collection wells in the plant area. The sewage is used to collect rainwater sewage, site cleaning wastewater, or concrete inspection wastewater. Insert a collection pipe into the well, connect an automatic valve, and use local control. The box controls the valve opening and closing according to the slag slurry level.

第二步,用真空泵抽吸具有一定容积的真空罐,形成负压,通过联通真空收集井的管路将泥浆不定时地抽吸进入真空分离罐。真空罐排浆口位于下底,抽真空口位于上顶,从而使得真空罐内渣浆与气体分离。In the second step, the vacuum tank with a certain volume is sucked by a vacuum pump to form a negative pressure, and the mud is sucked into the vacuum separation tank from time to time through the pipeline connected to the vacuum collection well. The slurry discharge port of the vacuum tank is located at the lower bottom, and the vacuum pumping port is located at the upper top, so that the slurry and the gas in the vacuum tank are separated.

所述集中处理方式为:The centralized processing method is:

首先,从真空罐分离出来的渣浆经过自动阀门,或者分散渣浆泵输送的渣浆,进入缓冲料斗,与第一渣浆泵对接。由第一渣浆泵将渣浆提升到一定高度。First, the slurry separated from the vacuum tank passes through the automatic valve, or the slurry transported by the dispersion slurry pump, enters the buffer hopper, and connects with the first slurry pump. The slurry is lifted to a certain height by the first slurry pump.

其次,渣浆落入并排交错旋转碟片的碟片筛,筛上物为大于第一分离粒径的砂、砾颗粒物,筛下物为小于第一分离粒径的流动性比较强的泥浆。Secondly, the slurry falls into the disc screen with staggered rotating discs side by side. The oversize particles are sand and gravel particles larger than the first separation particle size, and the underscreen is relatively fluid slurry smaller than the first separation particle size.

第三步,将泥浆导入立式转子离心固液分离机,将大于第二分离粒径的细颗粒通过离心作用分离后环周下沉浓缩。小于第二分离粒径的悬浮物低浓度泥浆自中心排出。In the third step, the slurry is introduced into the vertical rotor centrifugal solid-liquid separator, and the fine particles larger than the second separation particle diameter are separated by centrifugal action and then sink and concentrate around the circumference. The low-concentration slurry of suspended solids smaller than the second separation particle size is discharged from the center.

第四步,经过离心分离的小于第二分离粒径的泥浆,接入增压泵。当第二分离粒径满足混凝土生产要求,则增压泵将泥浆输送至生产线或者接入分部废水处理工艺。In the fourth step, the centrifugally separated mud smaller than the second separation particle size is connected to the booster pump. When the second separation particle size meets the concrete production requirements, the booster pump will transport the slurry to the production line or access the branch wastewater treatment process.

第五步,增压泵将小于第二分离粒径的泥浆输入烧结金属微孔过滤器。经过过滤的清水,进入清水池,进一步或者融入混凝土生产系统或者部分接入轮胎清洗系统循环利用。In the fifth step, the booster pump feeds the slurry smaller than the second separation particle size into the sintered metal microporous filter. The filtered clean water enters the clean water pool and is further integrated into the concrete production system or partially connected to the tire cleaning system for recycling.

分支步骤1,自所述离心机分离得到的大于第二分离粒径的浓缩泥浆,经过阀门直接转入压滤器。在所述压滤器内依靠自然水位差或者气压作用,水透过隔膜渗出,使罐内泥浆脱水,或者经过多次反复纳浆,累积足够的悬浮颗粒物,形成固形泥饼。最终卸出固形泥饼。In branch step 1, the concentrated mud larger than the second separation particle size obtained from the centrifuge is directly transferred to the filter press through the valve. Relying on the natural water level difference or air pressure in the filter press, water seeps out through the diaphragm to dehydrate the mud in the tank, or after repeated slurry storage, enough suspended particles are accumulated to form a solid mud cake. Finally unload the solid mud cake.

分支步骤2,自所述过滤器分离所滤余细颗粒浓缩泥浆,经过阀门直接转入压滤器。在压滤器内依靠自然水位差或者气压作用,水透过隔膜渗出,使罐内泥浆脱水,或者经过多次反复纳浆,累积足够的悬浮颗粒物,形成固形泥饼。最终卸出固形泥饼。In branch step 2, the filtered fine particle concentrated mud is separated from the filter, and directly transferred to the filter press through the valve. Relying on the natural water level difference or air pressure in the filter press, water seeps out through the diaphragm, dehydrating the mud in the tank, or after repeated slurry accumulation, enough suspended particles are accumulated to form a solid mud cake. Finally unload the solid mud cake.

所述废水真空收集方式,可全部替代为渣浆泵自分散收集井内泵送方式。考虑到设备磨损因素,优选所述真空收集方式。The waste water vacuum collection method can be completely replaced by the slurry pump self-dispersed collection well pumping method. Considering the factor of equipment wear, the vacuum collection method is preferred.

分部步骤1,混凝土泵车将清洗罐体形成的清洗废水直接倾倒入所述第一碟片筛或者相邻布置的第二碟片筛。其所选出大于第一分离粒径的砂、砾颗粒物直接落至地面或者汇入所述螺旋输送机输送至预定位置。小于第一分离粒径的筛下物则流动汇合,汇入所述离心机。In step 1, the concrete pump truck directly dumps the cleaning wastewater formed by cleaning the tank body into the first disc screen or the second disc screen arranged adjacently. The selected sand and gravel particles larger than the first separation particle size fall directly to the ground or enter the screw conveyor to be transported to a predetermined position. The sieves smaller than the first separation particle size flow and merge into the centrifuge.

分部步骤2,出入厂区的混凝土车辆经过轮胎清洗机清洗,将轮胎清洗废水用第二渣浆泵输送接入所述第四步至所述第一碟片筛上,或者输送接入第三步至所述缓冲料斗。In step 2, the concrete vehicles entering and leaving the factory are cleaned by the tire cleaning machine, and the tire cleaning wastewater is transported to the fourth step by the second slurry pump to the first disc screen, or transported to the third. Step to the buffer hopper.

分部步骤3,生活污水进入集成处理系统,经过强化搅拌厌氧、好氧曝气、恒通膜过滤,得到的中水汇入所述分部废水处理工艺或者所述清水池。In step 3 of subdivision, the domestic sewage enters the integrated treatment system, and after intensified stirring anaerobic, aerobic aeration, and constant-pass membrane filtration, the obtained reclaimed water is merged into the subdivision wastewater treatment process or the clear water tank.

附图说明Description of drawings

图1是根据本发明一种混凝土搅拌站废水零排放处理工艺流程示意图。Fig. 1 is a schematic diagram of a process flow diagram of zero-discharge treatment of waste water in a concrete mixing station according to the present invention.

图2是根据本发明的一种简化的混凝土搅拌站废水零排放处理工艺流程示意图。Fig. 2 is a simplified schematic diagram of the process flow of zero-discharge treatment of waste water in a concrete batching plant according to the present invention.

附图标记说明Description of reference numerals

具体实施方式Detailed ways

下面详细描述本发明的实施方式,所述实施方式的示例在附图中示出。下面通过参考附图描述的实施方式是示例性的,旨在用于解释本发明,而不能理解为对本发明的限制。Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as a limitation of the present invention.

实施例一:Example 1:

下面参考附图描述根据本发明实施方式的混凝土搅拌站废水零排放处理工艺。如图1。The following describes a zero-discharge treatment process for wastewater from a concrete batching plant according to an embodiment of the present invention with reference to the accompanying drawings. Figure 1.

采用真空收集系统,通过多点分散布置的收集井,将分散、不连续的场地清洁污水、雨水、生产环节废水抽吸至真空分离罐罐,再通过渣浆泵将渣泥提升到第一碟片筛,大于第一分离粒径的砂砾经过碟片传送、沥水至一侧,落入螺旋输送机,小于第一分离粒径的筛下物泥浆跌入立式转子离心机浆,在离心作用下,大于第二分离粒径的颗粒物在离心场外围沉降浓缩,小于第二分离粒径的颗粒物自离心场中心溢出,经过增压泵,以一定压力输入刚性膜过滤器,输出清水。自离心机沉降浓缩的泥浆经过阀门落入压滤器,关闭阀门对泥浆压滤,反复纳浆、压滤多次,则形成成块泥饼,再卸料。从离心机沉降分离出来的泥浆同样经阀门落入压滤器压滤,输出泥饼。The vacuum collection system is adopted, and the scattered and discontinuous site cleaning sewage, rainwater, and production wastewater are pumped into the vacuum separation tank through the collection wells arranged at multiple points, and then the sludge is lifted to the first plate through the slurry pump. Plate sieve, the grit larger than the first separation particle size is transported by the disc, drained to one side, and falls into the screw conveyor, and the under-sieve mud smaller than the first separation particle size falls into the vertical rotor centrifuge slurry. The particles larger than the second separation particle size settle and concentrate at the periphery of the centrifugal field, and the particles smaller than the second separation particle size overflow from the center of the centrifugal field, pass through the booster pump, and enter the rigid membrane filter at a certain pressure to output clean water. The sludge settled and concentrated from the centrifuge falls into the filter press through the valve, and the valve is closed to filter the mud. The sludge separated from the centrifuge sedimentation also falls into the filter press through the valve to filter and output the mud cake.

混凝土泵车清洗废水直接倾倒在第二碟片筛上,筛下物汇入离心机,筛上物砂砾汇入螺旋输送机。The waste water from the concrete pump truck is directly dumped on the second disc screen, the material under the screen is fed into the centrifuge, and the sand and gravel above the screen is fed into the screw conveyor.

出入搅拌站的车辆经过轮胎清洗,使得内外场地道路扬尘得以治理,清洗泥浆经第二渣浆泵输送至第一碟片筛上。Vehicles entering and leaving the mixing station are cleaned by tires, so that the road dust inside and outside the site can be controlled, and the cleaning mud is transported to the first disc screen by the second slurry pump.

生活污水则通过强化厌氧、好氧、刚性膜过滤,汇入清水管路。Domestic sewage is filtered through enhanced anaerobic, aerobic, and rigid membranes, and then flows into the clean water pipeline.

本发明工艺技术原理有以下几个要点:The technical principle of the present invention has the following points:

1)真空收集的优势1) Advantages of vacuum collection

真空收集是一种固液气三相混合体系的快速输送,间歇性运行。每次抽吸,都伴随气流清洁管路,对管道的磨损显著,故消除了管道、沟渠的淤积、结壳、堵塞。Vacuum collection is a kind of rapid conveying of solid-liquid-gas three-phase mixed system, which operates intermittently. Each time suction is accompanied by the airflow to clean the pipeline, and the wear on the pipeline is significant, so the siltation, crusting and blockage of the pipeline and ditches are eliminated.

真空收集适应间歇料流,还能够抽吸输送与管径相当的石子。对物料的适应能力很强。Vacuum collection is suitable for intermittent material flow, and it can also pump and transport stones with the same diameter as the pipe. Strong adaptability to materials.

真空收集承受管路2~4m的起伏,对场地几乎没有特殊要求,平管、上下拐弯均不影响,这就省去了排水沟放坡的需求。The vacuum collection can withstand the undulations of 2-4m in the pipeline, and there are almost no special requirements for the site, and the flat pipes and up and down bends are not affected, which eliminates the need for drainage ditch grading.

2)碟片筛分离砂砾的优势2) Advantages of disc screen for separating grit

碟片筛是通过交错分布的碟片形成的间隙形成分离粒径的,筛面是动态的,吃浆能力很强,砂砾可以被快速分离、转移,并沥干游离水。The disc screen is formed by the gaps formed by the staggered discs to form the separation particle size. The screen surface is dynamic and has a strong ability to eat pulp. The grit can be quickly separated, transferred, and drained of free water.

3)短过程可行3) Short process is feasible

混凝土搅拌站废水是高浓度悬浮物废水,立式转子离心机的通过转子制造离心分离场。所输出的小于第二分离粒径的低浓度浆液,具有均匀性,则可以直接进入混凝土拌和系统或者接入轮胎清洗循环。若需要清水循环,则进一步用增压泵输送至过滤器,分离出清水。Concrete mixing station wastewater is high-concentration suspended solids wastewater, and the vertical rotor centrifuge uses the rotor to create a centrifugal separation field. The output low-concentration slurry smaller than the second separation particle size has uniformity, and can be directly entered into the concrete mixing system or into the tire washing cycle. If the circulation of clean water is required, it is further conveyed to the filter by the booster pump to separate the clean water.

4)刚性过滤4) Rigid filtering

烧结金属微孔滤芯的孔径已经小至0.5微米,用其对离心沉降的清液进行过滤,可以得到浊度小于1的清水。这种滤孔稳定无弹性,滤下来的泥膜敷在滤芯表面,反洗容易成片脱落,孔隙容易再生。The pore size of the sintered metal microporous filter element has been as small as 0.5 microns, and it can be used to filter the clear liquid settled by centrifugation to obtain clear water with a turbidity of less than 1. The filter pores are stable and inelastic, and the filtered mud film is deposited on the surface of the filter element, which is easy to fall off into pieces when backwashed, and the pores are easy to regenerate.

实施例二:Embodiment 2:

下面参考附图描述根据本发明实施方式的一种简化混凝土搅拌站废水零排放处理工艺。如图2。The following describes a simplified zero-discharge treatment process for wastewater from a concrete mixing plant according to an embodiment of the present invention with reference to the accompanying drawings. Figure 2.

与实施例一不同的地方是,没有设置轮胎清洗废水处理、生活污水处理,不要求清水循环利用,只考虑合格的泥浆循环,它是一个分部、短过程混凝土搅拌站废水处理工艺。The difference from the first embodiment is that there is no tire washing wastewater treatment and domestic sewage treatment, and no clean water recycling is required, only qualified mud circulation is considered.

有益效果beneficial effect

相比现有技术,本发明混凝土搅拌站废水零排放处理工艺有如下有益效果:Compared with the prior art, the present invention has the following beneficial effects:

1)全过程封闭进行,没有了裸露的沉淀池,不再会出现铲车打捞清淤捞泥的机会,站内面貌显著升级;1) The whole process is carried out in a closed manner, without the exposed sedimentation tank, there will no longer be opportunities for forklifts to salvage silt and mud, and the appearance of the station has been significantly upgraded;

2)站域内所有废水不再外排,切实实现了零排放;2) All waste water in the station area is no longer discharged, and zero discharge is practically achieved;

3)砂砾料充分回收利用;3) The sand and gravel materials are fully recycled;

4)产出固态化泥饼,便于堆存、转运;4) Produce solidified mud cake, which is convenient for storage and transportation;

5)收集系统布置隐蔽;5) The arrangement of the collection system is concealed;

6)设施集中、集成,占地面积小;6) The facilities are centralized and integrated, and the floor area is small;

7)尾液稳定均匀,便于搅拌站循环利用;7) The tail liquid is stable and uniform, which is convenient for the recycling of the mixing station;

8)轮胎清洗实现了清水洗或者低浊度水清洗,洗车效率提高,喷嘴磨损大幅度降低。8) Tire cleaning realizes clean water or low turbidity water cleaning, improves car washing efficiency, and greatly reduces nozzle wear.

Claims (7)

1. A zero discharge treatment process of waste water of a concrete mixing plant is used for treating the waste water of the plant area of the concrete mixing plant and is characterized by comprising six parts, namely rainwater waste water treatment, site cleaning waste water treatment, concrete pump truck washing waste water treatment, and/or tire cleaning waste water, and/or concrete inspection waste water treatment, and/or domestic waste water treatment; except for domestic sewage treatment, all other parts of wastewater treatment adopt an overall process of collecting wastewater dispersedly and then carrying out centralized treatment;
the dispersed wastewater collection mode is vacuum collection and/or slurry pump conveying; the centralized treatment sequentially comprises the processes of disk screen coarse separation, vertical centrifuge fine separation, and/or rigid membrane filtration separation, and filter pressing and mud cake pressing by a filter press.
2. The zero discharge treatment process of waste water of the concrete mixing plant according to claim 1,
the vacuum collection mode is as follows:
firstly, arranging vacuum collecting wells at multiple points in a factory area in a dispersed manner, wherein sewage is used for collecting rainwater sewage, field cleaning wastewater or concrete inspection wastewater in the factory area, inserting a collecting pipe into the wells, connecting an automatic valve, and controlling the valve to be opened and closed by using an on-site control box according to the slurry level;
secondly, pumping a vacuum tank with a certain volume by using a vacuum pump to form negative pressure, and pumping the slurry into a vacuum separation tank at random through a pipeline communicated with a vacuum collection well; the vacuum tank slurry discharge port is positioned at the lower bottom, and the vacuum pumping port is positioned at the upper top, so that the slurry and the gas in the vacuum tank are separated.
3. The zero discharge treatment process of waste water of the concrete mixing plant according to claim 1,
the centralized processing mode is as follows:
firstly, the slurry separated from the vacuum tank enters a buffer hopper through an automatic valve or the slurry conveyed by a dispersed slurry pump and is butted with a first slurry pump; lifting the slurry to a certain height by a first slurry pump;
secondly, the slag slurry falls into a disc screen of parallel and staggered rotating discs, the oversize is sand and gravel particles with the particle size larger than the first separation particle size, and the undersize is slurry with stronger fluidity and smaller than the first separation particle size;
thirdly, guiding the slurry into a vertical rotor centrifugal solid-liquid separator, and carrying out circumferential sinking concentration on fine particles with the particle size larger than the second separation particle size after the fine particles are separated by centrifugal action; the suspended matter low-concentration slurry with the particle size smaller than the second separation particle size is discharged from the center;
fourthly, the centrifugally separated slurry with the particle size smaller than the second separation particle size is connected into a booster pump; when the second separation particle size meets the production requirement of concrete, the booster pump conveys the slurry to a production line or is connected to a sub-part wastewater treatment process;
branching the step 1, directly transferring the concentrated slurry with the particle size larger than the second separation particle size obtained by the separation of the centrifuge into a pressure filter through a valve; water seeps out through a diaphragm in the filter press under the action of natural water head difference or air pressure, so that slurry in the tank is dehydrated, or sufficient suspended particles are accumulated through repeated slurry receiving for many times, and a solid mud cake is formed; finally discharging the solid mud cake.
4. The zero discharge treatment process of waste water of the concrete mixing plant according to claim 2,
the booster pump inputs the slurry with the particle size smaller than the second separation particle size into the sintered metal microporous filter; the filtered clean water enters a clean water tank and is further either blended into a concrete production system or partially connected into a tire cleaning system for recycling;
separating the filtered fine particle concentrated slurry from the filter, and directly transferring the slurry to a filter press through a valve; water seeps out through a diaphragm in the filter press under the action of natural water head difference or air pressure, so that slurry in the tank is dehydrated, or sufficient suspended particles are accumulated through repeated slurry collection for many times, and a solid mud cake is formed; finally discharging the solid mud cake.
5. The zero discharge treatment process of waste water of the concrete mixing plant according to claim 2,
the concrete pump truck directly pours the cleaning wastewater formed by the cleaning tank body into the first disc screen or the second disc screen which is adjacently arranged; the selected sand and gravel particles with the particle size larger than the first separation particle size directly fall to the ground or are gathered into the spiral conveyer to be conveyed to a preset position; undersize smaller than the first separation particle size flow and join and are merged into the centrifuge.
6. The zero discharge treatment process of waste water of the concrete mixing plant according to claim 2,
and (3) cleaning the concrete vehicles entering and leaving the plant area by a tire cleaning machine, and conveying the tire cleaning wastewater to the first disc screen by using a second slurry pump or conveying the tire cleaning wastewater to the buffer hopper.
7. The concrete mixing plant wastewater zero emission treatment process according to one of the claims 3 and 4,
domestic sewage enters an integrated treatment system, and through reinforced stirring anaerobic treatment, aerobic aeration and constant-flux membrane filtration, the obtained reclaimed water is converged into the branch wastewater treatment process or the clean water tank.
CN202010521626.2A 2020-06-05 2020-06-05 Concrete batching plant wastewater zero discharge process Pending CN111635098A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010521626.2A CN111635098A (en) 2020-06-05 2020-06-05 Concrete batching plant wastewater zero discharge process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010521626.2A CN111635098A (en) 2020-06-05 2020-06-05 Concrete batching plant wastewater zero discharge process

Publications (1)

Publication Number Publication Date
CN111635098A true CN111635098A (en) 2020-09-08

Family

ID=72325485

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010521626.2A Pending CN111635098A (en) 2020-06-05 2020-06-05 Concrete batching plant wastewater zero discharge process

Country Status (1)

Country Link
CN (1) CN111635098A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113232157A (en) * 2021-06-03 2021-08-10 中建西部建设建材科学研究院有限公司 Waste slurry recycling process and device for mixing plant
CN117205667A (en) * 2023-10-23 2023-12-12 水利部牧区水利科学研究所 A filtering device for taking Yellow River water
CN117258587A (en) * 2023-11-22 2023-12-22 福建南方路面机械股份有限公司 Efficient mixing and stirring device and mixing process thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102242550A (en) * 2011-04-06 2011-11-16 清华大学深圳研究生院 Vacuum sewage interception system and method which are suitable for erecting pipes coastwise
CN107970679A (en) * 2017-11-27 2018-05-01 张玉唐 Concrete mixing plant sewage recovering system
CN110568142A (en) * 2019-09-25 2019-12-13 成都精准混凝土有限公司 Detection process of concrete wastewater
CN110655299A (en) * 2019-07-17 2020-01-07 高根树 Slurry treatment process and system device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102242550A (en) * 2011-04-06 2011-11-16 清华大学深圳研究生院 Vacuum sewage interception system and method which are suitable for erecting pipes coastwise
CN107970679A (en) * 2017-11-27 2018-05-01 张玉唐 Concrete mixing plant sewage recovering system
CN110655299A (en) * 2019-07-17 2020-01-07 高根树 Slurry treatment process and system device
CN110568142A (en) * 2019-09-25 2019-12-13 成都精准混凝土有限公司 Detection process of concrete wastewater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113232157A (en) * 2021-06-03 2021-08-10 中建西部建设建材科学研究院有限公司 Waste slurry recycling process and device for mixing plant
CN117205667A (en) * 2023-10-23 2023-12-12 水利部牧区水利科学研究所 A filtering device for taking Yellow River water
CN117258587A (en) * 2023-11-22 2023-12-22 福建南方路面机械股份有限公司 Efficient mixing and stirring device and mixing process thereof

Similar Documents

Publication Publication Date Title
CN110695064B (en) Shield slag zero-emission treatment system and method
CN110303033B (en) Shield construction muck treatment system and treatment method
CN102225834B (en) Sludge treatment method and device for urban drainage pipe network
CN110340112B (en) Method and system for comprehensively treating and ecologically utilizing soil pressure balance shield muck and resources
CN211100741U (en) Shield muck zero-emission treatment system
KR102734956B1 (en) Systems and methods for cleaning and grading particulate matter
CN111635098A (en) Concrete batching plant wastewater zero discharge process
CN210450263U (en) Earth pressure balance shield muck comprehensive treatment and resource ecological utilization system
CN104230123B (en) Remove the device of inorganic particle in Sewage treatment systems
CN210305011U (en) Shield constructs construction dregs processing system
CN104291469A (en) Reinforced fine sand removal system and method
CN109721191A (en) A kind of sandstone building stones production wastewater treatment system
KR101431161B1 (en) Filtering, dehydrating equipment of sand and impurities
CN111072186A (en) A system and method for cleaning the transport tanker of a commercial concrete mixing station and purifying the station sewage
CN214974790U (en) Earth pressure balance shield muck environment-friendly treatment system
CN211688622U (en) Commercial concrete mixing plant transportation tank car washs and station sewage purification system
CN113321391A (en) Urban sewer ditch sludge device and process
CN209835808U (en) Concrete Slurry Water Recovery System
CN211111374U (en) Waste material and waste water recycling system of concrete mixing plant
CN202063817U (en) Municipal drainage pipe network sludge treatment device
CN212283180U (en) Tank washing mud filter device
CN216039178U (en) Urban sewer dredging sludge device
CN209835809U (en) Concrete slurry water automatic recovery system
CN212703649U (en) Muck resourceful treatment system
CN109966802A (en) A kind of new green environment protection mud disposal system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20200908