WO2018032833A1 - 河湖泊涌污染底泥处理余沙再生*** - Google Patents

河湖泊涌污染底泥处理余沙再生*** Download PDF

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Publication number
WO2018032833A1
WO2018032833A1 PCT/CN2017/084965 CN2017084965W WO2018032833A1 WO 2018032833 A1 WO2018032833 A1 WO 2018032833A1 CN 2017084965 W CN2017084965 W CN 2017084965W WO 2018032833 A1 WO2018032833 A1 WO 2018032833A1
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WIPO (PCT)
Prior art keywords
sand
sediment
water
river
regeneration system
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PCT/CN2017/084965
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English (en)
French (fr)
Inventor
陶明
翟德勤
陈士强
赵新民
赵明江
卢驰江
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中电建水环境治理技术有限公司
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Publication of WO2018032833A1 publication Critical patent/WO2018032833A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass

Definitions

  • the present invention belongs to the technical field of water environment treatment, and in particular relates to a system for treating residual sand in a river and lake pollution sediment.
  • the river is a kind of open water, generally characterized by narrow water surface, long process, and tidal characteristics of coastal and offshore rivers.
  • the lake is a relatively closed water area with wide water surface, shallow water and water flow.
  • the characteristics of slow speed and slow water exchange are generally affected by seasonal rain.
  • the urban population has increased sharply, and the amount of sewage discharged into urban rivers and lakes has increased greatly.
  • Rivers and lakes have become a gathering place for various pollutants, causing serious pollution of water bodies and deteriorating water environment.
  • the water quality has become black and stinky, and the living environment of fish and shrimp has deteriorated drastically or cannot survive.
  • the bottom sediment of the river and lake bed is polluted by the long-term erosion of the contaminated water body, and the sedimentation of the sediment is formed for many years, which is an intrinsic pollution source that affects the quality of the water environment.
  • the object of the present invention is to provide a reclaimed sand regeneration system for river sediments, which aims to solve the technical problem of how to reclaim the sand in the contaminated sediment.
  • a river and lake flu pollution sediment treatment residual sand regeneration system including: [0006] garbage sorting equipment, the garbage sorting equipment is used for garbage separation of contaminated sediment Sorting out the sediment mixture; [0007] a sediment separation device, wherein the sediment separation device is configured to precipitate the sediment mixture to obtain a resource-recyclable residual sand, wherein the sediment separation device comprises granules the sediment mixture a sedimentation device for collecting and precipitating particle size and density, a sand-drawing device for extracting sand from the sedimentation device, and rinsing attached pollutants on the sand material extracted by the sand-drawing device The rinsing device is disposed between the sand absorbing device and the rinsing device.
  • the sand-sanding device includes a sand collecting ditch, a sand storage pit and an overflow weir which are disposed in parallel along the water flow direction, and the garbage sorting device moves the sediment mixture away from the sand storage pit One end of the sand is transported to the sand collecting ditch, and the sand storage pit is used for storing natural sedimented sand, and the sand removing device extracts the sand material from the sand storage pit.
  • the sediment separation device further includes a sand scraper installed in the sand collecting ditch and operating in a reverse water flow direction to push the sand material in the sand collecting ditch into the sand storage pit. .
  • the number of the sand-sanding devices is two or more, and two adjacent sand-sinking devices in the water flow direction are in communication with each other.
  • the river and lake flu pollution sediment treatment residual sand regeneration system further includes a gas collection device disposed at the top of the sedimentation device and forming a confined space with the sedimentation device for collecting odor a cover and a fan mounted in the air hood to form a negative pressure in the sealed space.
  • the garbage sorting device includes a garbage sorting device for separating and classifying the garbage in the contaminated sediment, and connecting the end of the pipeline conveying device to collect the polluted sediment mining And an odor collecting and processing device for the malodorous gas diffused during the conveying process, wherein the garbage sorting device is in communication with the sand discharging device, and an air outlet of the air collecting hood is connected to the odor collecting and processing device Air port
  • the river lake flu pollution sediment treatment residual sand regeneration system further includes a mud water mixture for taking out the sedimentation device and precipitating and purifying the mud water mixture to obtain a reflowable Mud water separation equipment for residual water.
  • the muddy water separation device includes a residual water multi-stage purification device for storing the recyclable residual water, and the sediment separation device further includes a multi-stage purification device connected to the residual water.
  • the pumping device is configured to extract the draining water between the rinsing devices to flush the sand material in the rinsing device.
  • the sediment separation device further includes a communication between the rinsing device and the sanding device And used to discharge the muddy water mixture after rinsing the sand material to the muddy water returning device in the sedimentation device.
  • the river and lake flu pollution sediment treatment residual sand regeneration system further includes a sand outlet connected to the leaching device and used for sieving the sand material after leaching according to particle size And a sorting device and a discharge port disposed at the ejecting device for transporting the rinsed sand material to a conveyor belt of the stacking site.
  • the river lake urgency pollution sediment treatment residual sand regeneration system utilizes the characteristics of the particle size and density of the sediment particles and combines the hydraulic principles, using the sedimentation device Realizing the natural separation of the sediment in the sediment mixture, the sand having a larger density and larger particles is retained at the bottom of the sedimentation device, and is deposited by the sand-drawing device by the sand-drawing device The sand material is extracted and washed by the rinsing device to remove toxic substances such as heavy metals and organic substances attached to the surface of the sand material, so that the sand material after leaching becomes a residual sand for resource recycling, for example,
  • the renewable resources of the renewable resources can be used for municipal, water conservancy, transportation and other engineering building materials.
  • FIG. 1 is a structural layout diagram of a residual sediment regeneration system for river sediments in rivers and lakes according to an embodiment of the present invention.
  • FIG. 2 is a structural view of a sedimentation device of the residual sediment regeneration system of the river and lake in the river;
  • FIG. 3 is a structural view of a sediment separation device of the residual sediment regeneration system of the river and lake in the river;
  • FIG. 4 is a structural block diagram of a residual sediment regeneration system for river sediments in a river and a lake according to an embodiment of the present invention.
  • first and second are used for descriptive purposes only, and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” and “second” may explicitly or implicitly include one or more of the features.
  • the meaning of “plurality” is two or more, unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like should be understood broadly, and may be, for example, a fixed connection or a Removable connection, or into Integral; can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, which can be the internal connection of two elements or the interaction of two elements.
  • an intermediate medium which can be the internal connection of two elements or the interaction of two elements.
  • the system for treating the residual sand of the river and lake pollution sediments provided by the embodiment of the present invention includes:
  • a garbage sorting device 10 wherein the garbage sorting device 10 is configured to perform garbage separation on the contaminated sediment and sort the sediment mixture;
  • a sediment separation device 20 wherein the sediment separation device 20 is configured to precipitate the sediment mixture to obtain a resource-recyclable residual sand
  • the sediment separation device 20 includes the sediment a sedimentation device 22 for collecting and precipitating the mixture according to particle size and density, a sand-drawing device 24 for extracting sand from the sedimentation device 22, and the sand material extracted from the sand-drawing device 24.
  • a rinsing device 25 for rinsing the attached contaminant is disposed between the sedimentation device 22 and the rinsing device 25.
  • the sand and lake pollution sludge treatment residual sand regeneration system utilizes the characteristics of the particle size and density of the sediment particles and combines the hydraulic principles, and the sedimentation device 22 is used to realize the sediment
  • the natural separation of the sediment in the mixture, the sand having a larger density and larger particles are retained at the bottom of the sedimentation device 22, and the sand material deposited by the sedimentation device 22 is subjected to the sand-drawing device 24 Extracting and rinsing with the rinsing device 25 to remove toxic substances such as heavy metals and organic substances attached to the surface of the sand material, so that the sand material after leaching becomes a residual sand which can be regenerated by resources, for example, Recycling of resources is used for municipal, water conservancy, transportation and other engineering building materials.
  • the extracted sand material is washed by the rinsing device 25 to remove toxic substances such as heavy metals and organic substances attached to the surface of the sand material, thereby achieving harmless treatment.
  • the sedimentation device 22 during the treatment of the contaminated sediment, the sedimentation device 22, the sand-drawing device 24 and the leaching device 25 are utilized to effect separation of the sediment mixture
  • the process of extracting sand and cleaning sand materials is highly concentrated, so that the generated resources can be used to reclaim the residual sand to meet the sand requirements of the building, and the resource recycling requirements of the sand in the contaminated sediment are realized.
  • the pollution sedimentation is reduced, harmless, and resourced.
  • the residual sand particles after sorting and cleaning have a particle size of 0.1 mm to 5.0 mm, and the mud content is less than 1 ⁇ 3 ⁇ 4.
  • the leaching concentration of residual pollutants meets the requirements of “Soil Environmental Quality Standards” (GB15618-1995) and “Construction Sands” (GB/T14684-2011), which meets the requirements for resource recycling.
  • the sand-sanding device 22 includes a sand collecting ditch 220, a sand storage pit 222 and a weir 224 which are sequentially disposed in the water flow direction, and the garbage sorting device 10 Disposing the sediment mixture along the end away from the sand storage pit 222 to the sand collecting trench 220, wherein the sand storage pit 222 is used for storing natural sedimented sand, and the sand lifting device 24 is from the storage The sand material is extracted from the sand pit 222.
  • the river lake rushing sediment sludge treatment residual sand regeneration system sequentially sets the sand collecting tank 220, the sand storage pit 222 and the weir 224 in the direction of water flow to make sediment in the sediment mixture A precipitate is obtained in the direction of the water flow, and the sediment is separated to collect the precipitated sand in the sand storage pit 222.
  • the sand storage pit 222 is slightly lower than the bottom of the sand collecting trench 220, and the overflow weir 22 is inclined with the bottom surface of the sand storage pit 222 to form an upward slope. a slope of the sand mixture deposited in the sand storage pit 222 under the action of its own gravity, and other lighter sand stones settled under the overflow of the weir 224 Flowing 224 surface.
  • the sediment separation device 20 further includes a sand installed in the sand collecting channel 22 and operating in a reverse water flow direction to sand the sand collecting channel 220.
  • the scraper 226 is pushed into the sand storage pit 222.
  • the sand scraper 226 is operated in the reverse water flow direction to collect the sand material along the sand collecting ditch 220 in the sand collecting device 2 2 to collect the sand collecting efficiency.
  • the residual sand recycling system is provided with a sand-drawing device 24 and a rinsing device 25 on the side of the sand-sanding device 22, and the sand-drawing device 24 is connected in series with the rinsing device 25, and the separated sand material has been completed. Perform secondary rinsing and cleaning to automate and integrate sediment separation, extraction and leaching.
  • the sand scraper 226 is a plate type sand scraper 226, and the sand lifting device 24 is a wheeled sand lifting machine.
  • the number of the sand-sanding devices 22 is two or more, and two adjacent sand-sanding devices 22 in the water flow direction are in communication with each other.
  • the route for separating sediments is extended, and the sand material is divided according to the particle size. The classification is carried out to achieve the classification of the coarse sand and the separation of the sediment in the sediment mixture more thoroughly.
  • the number of the sand-sanding devices 22 may be determined according to the amount of sand contained in the sediment mixture, and the internal structure and arrangement of each of the sand-sanding devices 22 are the same.
  • the bottom surface of the sand-sanding device 22 is a planar structure and has a square shape. Preferably, it is 30 m long and 10 m wide in the direction of the water flow, and the cross-section thereof adopts an inverted trapezoidal design. 22
  • the side walls of the two sides along the water flow direction are built with a slope protection structure with a slope ratio of 1:1.5, and the bottom is formed with the sand collecting groove 220 with a width of 4 m; the particle size and density of the sediment particles are different, combined
  • the principle of water flow force realizes the natural precipitation of coarse-grained sand material, and the light-weight granular mud is carried away with the water flow.
  • the weir 224 having a right-angled triangle is disposed along the direction of the water flow from the direction of the slurry feeding of the sanding device 22, and preferably, the triangle of the weir 224 is long.
  • the slope ratio is between 1.5 and 1.8
  • the sand hopper 222 having a width of 3 m is disposed between the weir 224 and the sand collecting trench 220.
  • the purpose of the weir 224 is to adjust the water flow rate, increase the proportion and quantity of the sand material, and the parameters such as the length, height and slope ratio of the weir 224 may be based on the sand particles in the mud. Adjustment and determination
  • the contaminated sediment in the river and the lake often contains a large amount of sand in addition to fine particles such as sludge, and the presence of sand is not conducive to the removal of heavy metal pollutants in the sludge.
  • the principle of reducing the amount of waste water from the river and lake sediments provided by the embodiment is combined with the principle of reducing the amount of sludge from rivers and lakes, and a set of leaching process is designed to enhance and wash the residual sand contained in the contaminated sediment. And remove the organic matter and floating garbage, fully utilize the grinding function of the wheel washing machine to achieve effective separation of the sediment, and then further remove the solid pollutants from the residual sand through the washing and screening equipment, and finally produce the energy.
  • the river and lake pollution sediment treatment residual sand regeneration system further includes a top portion of the sedimentation device 22 and a sealing structure with the sand deposition device 22
  • the space is a gas collecting hood (not shown) for collecting odor, and a fan (not shown) attached to the gas collecting hood to form a negative pressure in the sealed space.
  • the river lake rushing sediment sludge treatment residual sand regeneration system uses the gas collecting hood to collect the odor generated by the sediment mixture poured into the sedimentation device 22 to collect the odor in the short raft And using the extension to form a negative pressure in the sealed space so that the odor does not overflow.
  • the odor is sucked into the acid-base pool by the gas collecting hood, and the odor is thoroughly mixed with the strong acid and the strong alkali solution by aeration to separately remove the ammonia gas and the hydrogen sulfide gas.
  • the garbage sorting apparatus 10 includes a garbage sorting device 12 for separating and classifying garbage in the contaminated sediment, and communicating the pipeline conveying device.
  • An odor collecting and processing device 14 for collecting the malodorous gas diffused during the mining and transportation of the contaminated sediment, the garbage sorting device 12 is in communication with the sanding device 22, and the gas collecting hood is discharged
  • the port is connected to the intake port of the odor collecting and processing device 14.
  • the garbage sedimentation device 12 is used to classify the received contaminated sediment to distinguish between construction waste, domestic garbage, large-grain rainwater drifting stone, gravel, gravel and sediment mixture, etc., the sediment The mixture is to be processed later.
  • catalytic gas generation and power generation can be carried out to realize resource recycling.
  • the contaminated sediment is subjected to garbage sorting by the garbage sorting device 12 to realize the first reduction treatment of the contaminated sediment, and the amount of subsequent disposal is reduced.
  • the odor collecting and processing device 14 is utilized to collect anaerobic fermentation in the contaminated sediment through the conveying pipeline to generate ammonia gas, hydrogen sulfide, etc., Effective control of gas diffusion.
  • the odor collecting and processing device 14 is connected to the acid pool and the alkaline pool via a conduit to effectively reduce the concentration of ammonia and hydrogen sulfide in the gas, to achieve the purpose of deodorization, and to achieve odor emission compliance, avoiding occurrence Air pollution.
  • the toxic gas emission concentration at the perimeter of the construction river lake and the bottom mud treatment plant in the embodiment of the present invention satisfies the emission of odor pollutants.
  • the river lake flu pollution sediment treatment residual sand regeneration system further includes a mud water mixture for taking out the sedimentation device 22 and precipitating and purifying the mud water mixture.
  • the treatment is performed to obtain a muddy water separation device 30 that can drain the remaining water.
  • the muddy water separation device 30 is disposed to perform static precipitation and purification treatment on the muddy water mixture separated in the sediment separation device 20 to obtain recirculated residual water, and the recirculated residual water is discharged. Recycling in the rivers and rivers.
  • the muddy water separation device 30 includes a residual water multi-stage purification device 40 for storing the recyclable residual water
  • the sediment separation device 20 further includes a communication device
  • a water pumping device 26 is disposed between the residual water multi-stage purification device 40 and the rinsing device 25 to extract the drainable water to flush the sand material in the rinsing device 25.
  • the recyclable water generated by the purification process of the mud-water separation device 30 is stored in the residual water multi-stage purification device 40, and the water-removing device 26 is used to The drain water is pumped into the rinsing device 25 to flush the sand material to achieve water reuse and avoid waste of resources.
  • the sediment separating apparatus 20 further includes a muddy water mixture connected between the rinsing device 25 and the sand absorbing device 22 and used to discharge the muddy water mixture after the rinsing sand is discharged.
  • the muddy water returning device 27 in the sanding device 22 is described. By setting the muddy water returning device 27, the muddy water mixture generated after flushing the sand material is discharged back into the sedimentation device 22 for sedimentation, so as to realize re-precipitation of the sediment and regeneration of the remaining water, thereby realizing the residual sand. regeneration.
  • the river and lake flu pollution sediment treatment residual sand regeneration system further includes a discharge port disposed at the discharge port of the rinsing device 25 for rinsing the sand material Conveyor belt 29 transported to the stacking site.
  • the river and lake flu pollution sediment treatment residual sand regeneration system realizes automatic processing of the sand material by providing the conveyor belt conveyor 29 to transport the rinsed sand material to the stacking site.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Treatment Of Sludge (AREA)

Abstract

一种河湖泊涌污染底泥处理余沙再生***，包括：垃圾分选设备(10)，用于对污染底泥进行垃圾分离并分选出泥沙混合物；泥沙分离设备(20)，用于对泥沙混合物进行沉淀以得到可资源再生利用余沙，其中，泥沙分离设备(20)包括对泥沙混合物按颗粒粒径和密度进行收集和沉淀的沉沙装置(22)、对沙料进行提取的提沙装置(24)以及对提取出的沙料上的附着污染物进行冲洗的淋洗装置(25)。该余沙再生***通过使得密度和颗粒较大的沙料留存于沉沙装置的底部，以及利用提沙装置提取沙料、淋洗装置冲洗沙料，将沙料表面附着的重金属、有机物等有毒物质清除，以使淋洗后的沙料变成可资源再生利用的余沙。

Description

河湖泊涌污染底泥处理余沙再生*** 技术领域
[0001] 本发明属于水环境治理技术领域， 尤其涉及一种河湖泊涌污染底泥处理余沙再 生***。
背景技术
[0002] 河涌是一种幵放式水域， 一般具有水面窄、 流程长、 沿海与近海河流多具有感 潮特征等特点， 湖泊是一种相对封闭的水域， 具有水面宽、 水深浅、 水流速度 缓、 水体交换慢等特点， 河湖泊涌一般容易受季节雨汛影响。 随着社会经济的 迅猛发展， 城市人口急剧增多， 面向城市河湖泊涌的排污量大幅度增加， 河湖 泊涌成了各种污染物的汇集场所， 使水体污染日趋严重， 水环境状况日益恶化 ， 水质变黑发臭、 鱼虾生存环境急剧恶化或无法生存。 河湖泊涌床底底泥受污 染水体长期侵蚀、 多年沉积形成污染底泥且日益加重， 是影响水环境质量的内 在污染源。
[0003] 在河湖泊涌水环境治理的过程中， 业内逐渐形成需要截断外污染源、 清除内污 染源、 水质净化、 生态恢复四个步骤的共识。 通常是将污染底泥进行脱水固化 再进行后期处置， 例如堆放或填埋等， 这大大增大了后期推翻和填埋的场地占 用压力。 而且， 污染底泥中含有大量沙料， 如何将污染底泥中的沙料提取出来 以实现资源再生利用已成为业内亟待解决的技术问题。
技术问题
[0004] 本发明的目的在于提供一种河湖泊涌污染底泥处理余沙再生***， 旨在解决如 何将污染底泥中的沙料提取出来已实现资源再生利用的技术问题。
问题的解决方案
技术解决方案
[0005] 本发明是这样实现的， 一种河湖泊涌污染底泥处理余沙再生***， 包括： [0006] 垃圾分选设备， 所述垃圾分选设备用于对污染底泥进行垃圾分离并分选出泥沙 混合物； [0007] 泥沙分离设备， 所述泥沙分离设备用于对所述泥沙混合物进行沉淀以得到可资 源再生利用余沙， 其中， 所述泥沙分离设备包括对所述泥沙混合物按颗粒粒径 和密度进行收集和沉淀的沉沙装置、 对所述沉沙装置中的沙料进行提取的提沙 装置以及对所述提沙装置提取出的所述沙料上的附着污染物进行冲洗的淋洗装 置， 所述提沙装置设置于所述沉沙装置与所述淋洗装置之间。
[0008] 进一步地， 所述沉沙装置包括沿水流方向依次相通设置的集沙沟、 储沙坑和溢 流堰， 所述垃圾分选设备将所述泥沙混合物沿远离所述储沙坑的一端输送至所 述集沙沟， 所述储沙坑用于存放自然沉淀的沙料， 所述提沙装置从所述储沙坑 中提取所述沙料。
[0009] 进一步地， 所述泥沙分离设备还包括安装于所述集沙沟内并沿逆水流方向运转 以将所述集沙沟内的沙料推入所述储沙坑内的刮沙机。
[0010] 进一步地， 所述沉沙装置的数量为两个或者两个以上， 沿水流方向的相邻两所 述沉沙装置相互连通。
[0011] 进一步地， 所述河湖泊涌污染底泥处理余沙再生***还包括设置于所述沉沙装 置顶部并与所述沉沙装置之间形成密闭空间以用于收集臭气的集气罩以及安装 于所述集气罩内以使所述密闭空间形成负压的风机。
[0012] 进一步地， 所述垃圾分选设备包括用于对所述污染底泥中的垃圾进行分离和分 类的垃圾分选装置以及连通所述管道输送设备末端以收集所述污染底泥采挖和 输送过程中扩散的恶臭气体的臭气收集与处理装置， 所述垃圾分选装置与所述 沉沙装置连通， 所述集气罩的出气口连通至所述臭气收集与处理装置的进气口
[0013] 进一步地， 所述河湖泊涌污染底泥处理余沙再生***还包括用于承接所述沉沙 装置中流出的泥水混合物并对所述泥水混合物进行沉淀和净化处理以得到可回 排余水的泥水分离设备。
[0014] 进一步地， 所述泥水分离设备包括用于储放所述可回排余水的余水多级净化装 置， 所述泥沙分离设备还包括连通于所述余水多级净化装置与所述淋洗装置之 间并抽取所述可回排余水以在所述淋洗装置内冲洗所述沙料的抽水装置。
[0015] 进一步地， 所述泥沙分离设备还包括连通于所述淋洗装置与所述沉沙装置之间 并用于将冲洗沙料后的泥水混合物排放至所述沉沙装置中的泥水回排装置。
[0016] 进一步地， 所述河湖泊涌污染底泥处理余沙再生***还包括连接于所述淋洗装 置的出沙口处并用于将淋洗后的所述沙料按粒径大小进行筛分的筛选装置以及 设置于所述淋洗装置的出料口以用于将淋洗后的所述沙料运输至堆放场地的输 送皮带机。
发明的有益效果
有益效果
[0017] 本发明相对于现有技术的技术效果是： 该河湖泊涌污染底泥处理余沙再生*** 利用泥沙颗粒粒径和密度不同等特性并结合水力学原理， 采用所述沉沙装置实 现对所述泥沙混合物中泥沙的自然分离， 密度和颗粒较大的沙料留存于所述沉 沙装置的底部， 并利用所述提沙装置将经所述沉沙装置沉积处理后的沙料进行 提取并利用所述淋洗装置进行冲洗， 将所述沙料表面附着的重金属、 有机物等 有毒物质清除， 以使淋洗后的沙料变成可资源再生利用的余沙， 例如， 将该可 资源再生利用余沙用于市政、 水利、 交通等工程建材使用。
对附图的简要说明
附图说明
[0018] 为了更清楚地说明本发明实施例的技术方案， 下面将对本发明实施例或现有技 术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面所描述的附图仅 仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳 动的前提下， 还可以根据这些附图获得其他的附图。
[0019] 图 1是本发明实施例提供的河湖泊涌污染底泥处理余沙再生***的结构布局图
[0020] 图 2是图 1中河湖泊涌污染底泥处理余沙再生***的沉沙装置的结构图；
[0021] 图 3是图 1中河湖泊涌污染底泥处理余沙再生***的泥沙分离设备的结构图；
[0022] 图 4是本发明实施例提供的河湖泊涌污染底泥处理余沙再生***的结构框图。
[0023] 附图标记说明：
[] [表 1]
Figure imgf000006_0002
Figure imgf000006_0001
本发明的实施方式
[0024] 下面详细描述本发明的实施例， 所述实施例的示例在附图中示出， 其中自始至 终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。 下 面通过参考附图描述的实施例是示例性的， 旨在用于解释本发明， 而不能理解 为对本发明的限制。
[0025] 在本发明的描述中， 需要理解的是， 术语"长度"、 "宽度"、 "上"、 "下"、 "前" 、 "后"、 "左"、 "右"、 "竖直"、 "水平"、 "顶"、 "底 ""内"、 "外"等指示的方位或 位置关系为基于附图所示的方位或位置关系， 仅是为了便于描述本发明和简化 描述， 而不是指示或暗示所指的装置或元件必须具有特定的方位、 以特定的方 位构造和操作， 因此不能理解为对本发明的限制。
[0026] 此外， 术语"第一"、 "第二 "仅用于描述目的， 而不能理解为指示或暗示相对重 要性或者隐含指明所指示的技术特征的数量。 由此， 限定有 "第一"、 "第二 "的特 征可以明示或者隐含地包括一个或者更多个该特征。 在本发明的描述中， "多个" 的含义是两个或两个以上， 除非另有明确具体的限定。
[0027] 在本发明中， 除非另有明确的规定和限定， 术语"安装"、 "相连"、 "连接"、 "固 定"等术语应做广义理解， 例如， 可以是固定连接， 也可以是可拆卸连接， 或成 一体； 可以是机械连接， 也可以是电连接； 可以是直接相连， 也可以通过中间 媒介间接相连， 可以是两个元件内部的连通或两个元件的相互作用关系。 对于 本领域的普通技术人员而言， 可以根据具体情况理解上述术语在本发明中的具 体含义。
[0028] 为了使本发明的目的、 技术方案及优点更加清楚明白， 以下结合附图及实施例
， 对本发明进行进一步详细说明。
[0029] 请参照图 1至图 4， 本发明实施例提供的河湖泊涌污染底泥处理余沙再生***包 括：
[0030] 垃圾分选设备 10， 所述垃圾分选设备 10用于对污染底泥进行垃圾分离并分选出 泥沙混合物；
[0031] 泥沙分离设备 20， 所述泥沙分离设备 20用于对所述泥沙混合物进行沉淀以得到 可资源再生利用余沙， 其中， 所述泥沙分离设备 20包括对所述泥沙混合物按颗 粒粒径和密度进行收集和沉淀的沉沙装置 22、 对所述沉沙装置 22中的沙料进行 提取的提沙装置 24以及对所述提沙装置 24提取出的所述沙料上的附着污染物进 行冲洗的淋洗装置 25， 所述提沙装置 24设置于所述沉沙装置 22与所述淋洗装置 2 5之间。
[0032] 本发明实施例提供的河湖泊涌污染底泥处理余沙再生***利用泥沙颗粒粒径和 密度不同等特性并结合水力学原理， 采用所述沉沙装置 22实现对所述泥沙混合 物中泥沙的自然分离， 密度和颗粒较大的沙料留存于所述沉沙装置 22的底部， 并利用所述提沙装置 24将经所述沉沙装置 22沉积处理后的沙料进行提取并利用 所述淋洗装置 25进行冲洗， 将所述沙料表面附着的重金属、 有机物等有毒物质 清除， 以使淋洗后的沙料变成可资源再生的余沙， 例如， 将该可资源再生利用 余沙用于市政、 水利、 交通等工程建材使用。
[0033] 在该实施例中， 利用所述淋洗装置 25对提取出的所述沙料进行冲洗， 以去除附 着在所述沙料表面的重金属、 有机物等有毒物质， 实现无害处理。
[0034] 在该实施例中， 为了适应河湖泊涌中污染底泥夹杂大量建筑、 生活垃圾以及漂 石、 卵石等， 提高垃圾分选效率和做到宽适应性， 并且产能与挖泥船匹配， 该 河湖泊涌污染底泥处理余沙再生***集成了沉沙装置 22与提沙装置 24相结合的 泥沙分离技术。
[0035] 在该实施例中， 在对所述污染底泥的处理过程中， 利用所述沉沙装置 22、 所述 提沙装置 24和所述淋洗装置 25以实现对泥沙混合物的分离、 提取沙料和清洗沙 料多项处理工艺高度集中， 以使产生的可资源再生利用余沙满足建筑用沙要求 ， 实现了污染底泥中沙料的资源再生利用要求， 同吋， 实现了所述污染底泥的 减量化、 无害化、 资源化分级处理。
[0036] 在该实施例中， 经所述沉沙装置 22沉淀后， 分选清洗后的余沙颗粒粒径在 0.1m m~5.0mm， 含泥量小于 1<¾。 余沙污染物浸出浓度满足 《土壤环境质量标准》 ( GB15618-1995) 要求和 《建筑用沙》 （GB/T14684-2011) 标准， 满足资源再生 利用要求。
[0037] 请参照图 1至图 3， 进一步地， 所述沉沙装置 22包括沿水流方向依次相通设置的 集沙沟 220、 储沙坑 222和溢流堰 224， 所述垃圾分选设备 10将所述泥沙混合物沿 远离所述储沙坑 222的一端输送至所述集沙沟 220， 所述储沙坑 222用于存放自然 沉淀的沙料， 所述提沙装置 24从所述储沙坑 222中提取所述沙料。 该河湖泊涌污 染底泥处理余沙再生***通过在水流方向依次设置所述集沙沟 220、 所述储沙坑 222和所述溢流堰 224， 以使所述泥沙混合物中的泥沙在水流方向得到沉淀， 将 泥沙分离， 从而将沉淀的沙料收集于所述储沙坑 222内。
[0038] 在该实施例中， 所述储沙坑 222略低于所述集沙沟 220的底部， 且所述溢流堰 22 4与所述储沙坑 222底面呈倾斜设置， 形成向上倾斜的斜面， 所述泥沙混合物在 中沙料在自身重力作用下沉积于所述储沙坑 222内， 其他质量较轻的沙石在所述 溢流堰 224的抵挡作用下沉降于所述溢流堰 224表面。
[0039] 请参照图 1至图 3， 进一步地， 所述泥沙分离设备 20还包括安装于所述集沙沟 22 0内并沿逆水流方向运转以将所述集沙沟 220内的沙料推入所述储沙坑 222内的刮 沙机 226。 利用所述刮沙机 226沿逆水流方向运转， 以将沙料顺着所述沉沙装置 2 2内所述集沙沟 220向所述储沙坑 222内收集， 以提高沙料的收集效率， 并利用所 述提沙装置 24从所述储沙坑 222内提取出来， 并利用所述淋洗装置 25对所述沙料 进行冲洗。 该余沙再生利用***通过在沉沙装置 22侧边设置提沙装置 24和淋洗 装置 25， 利用所述提沙装置 24与所述淋洗装置 25串联， 已完成对分离出的沙料 进行二次淋洗和清洁工作， 从而实现泥沙分离、 提取和淋洗的自动化和集成化 目的。
[0040] 优选地， 所述刮沙机 226为板式刮沙机 226， 所述提沙装置 24为轮式提沙机。
[0041] 请参照图 2至图 3， 进一步地， 所述沉沙装置 22的数量为两个或者两个以上， 沿 水流方向的相邻两所述沉沙装置 22相互连通。 通过设置两个或者两个以上的沉 沙装置 22， 一方面可以起到扩大沉沙量的目的， 起到一定的扩容目的； 另一方 面延长了泥沙分离的线路， 将沙料按颗粒大小得到分类， 从而实现粗细沙料的 分类， 并且使所述泥沙混合物中泥沙分离的更加彻底。
[0042] 在该实施例中， 所述沉沙装置 22的数量可以根据所述泥沙混合物中含沙量多少 确定， 各所述沉沙装置 22的内部结构形式和布置方式相同。
[0043] 在该实施例中， 所述沉沙装置 22的底面为平面结构且呈方形， 优选地， 顺着水 流方向长 30m和宽 10m， 其横断面采用倒梯形设计， 所述沉沙装置 22沿水流方向 的两侧边墙内部砌有筑坡比为 1: 1.5的护角结构， 且底部形成宽度为 4m的所述集 沙沟 220; 利用泥沙颗粒的粒径和密度不同， 结合水流动力原理， 实现粗颗粒沙 料的自然沉淀， 质量较轻的颗粒泥则随水流带走。
[0044] 在该实施例中， 从所述沉沙装置 22的进浆方向为起点， 沿水流方向设置呈直角 三角形的所述溢流堰 224， 优选地， 所述溢流堰 224的三角形长边坡比为 1.5 1.8 之间， 所述溢流堰 224与所述集沙沟 220之间设置宽度为 3m的所述储沙坑 222。 所 述溢流堰 224的目的为调整水流速度， 增加所述沙料沉淀比例和数量， 所述溢流 堰 224的长度、 高度和坡比等参数可根据所述泥浆中所述沙料颗粒情况调整确定
[0045] 在该实施例中， 所述河湖泊涌中污染底泥除过污泥等细小颗粒外， 往往含有大 量的沙料， 沙砾的存在不利于污泥中重金属污染物的去除， 本发明实施例提供 的河湖泊涌污染底泥处理余沙再生***结合河湖污泥减量处理的原理， 设计一 套淋洗工艺， 对所述污染底泥中包含的余沙进行提升、 洗选， 并冲淋去除其中 的有机物及漂浮垃圾， 充分利用轮式洗沙机的磨洗功能， 实现泥沙的有效分离 ， 再通过冲洗及筛选设备， 进一步去除余沙的固体污染物， 最终生产出能符合 建筑用沙技术要求的沙料， 实现资源的再利用。 [0046] 请参照图 1至图 4， 进一步地， 所述河湖泊涌污染底泥处理余沙再生***还包括 设置于所述沉沙装置 22顶部并与所述沉沙装置 22之间形成密闭空间以用于收集 臭气的集气罩 （未图示） 以及安装于所述集气罩内以使所述密闭空间形成负压 的风机 （未图示） 。 所述河湖泊涌污染底泥处理余沙再生***利用所述集气罩 收集所述泥沙混合物倾倒至所述沉沙装置 22中所产生的臭气， 以在短吋间内集 中收集臭气， 并利用所述分机在所述密闭空间内形成负压， 以使臭气不外溢。 优选地， 利用所述集气罩将臭气抽至酸碱池内通过曝气使臭气与强酸、 强碱溶 液充分混合， 以分别去除氨气和硫化氢气体。
[0047] 请参照图 1和图 4， 进一步地， 所述垃圾分选设备 10包括用于对所述污染底泥中 的垃圾进行分离和分类的垃圾分选装置 12以及连通所述管道输送设备末端以收 集所述污染底泥采挖和输送过程中扩散的恶臭气体的臭气收集与处理装置 14， 所述垃圾分选装置 12与所述沉沙装置 22连通， 所述集气罩的出气口连通至所述 臭气收集与处理装置 14的进气口。 利用所述垃圾分选装置 12对接收的所述污染 底泥进行分类， 以区分出建筑垃圾、 生活垃圾、 大颗粒雨洪漂石、 卵砾石、 碎 石和泥沙混合物等， 所述泥沙混合物以待后续处理。 对于有机质、 热值较高的 生活垃圾等可以进行催化制气和发电， 实现资源的再生利用。 利用所述垃圾分 选装置 12对所述污染底泥进行垃圾分选以实现对污染底泥的第一次减量处理， 减小后续处置的量。
[0048] 在该实施例中， 利用所述臭气收集与处理装置 14以收集所述污染底泥中经所述 输送管道输送过程中发生厌氧发酵而产生氨气、 硫化氢等气体， 可以有效控制 气体扩散。 优选地， 所述臭气收集与处理装置 14经导管连接酸性池和碱性池， 以有效降低气体中氨气和硫化氢的浓度， 达到除臭的目的， 并且使得臭气排放 达标， 避免出现空气污染。
[0049] 在该实施例中， 经所述臭气收集与处理装置 14处理后， 本发明实施例施工河湖 泊涌周界、 底泥处理厂周界毒臭气体排放浓度满足 《恶臭污染物排放标准》 （G B 14554-1993) 标准要求。
[0050] 请参照图 4， 进一步地， 所述河湖泊涌污染底泥处理余沙再生***还包括用于 承接所述沉沙装置 22中流出的泥水混合物并对所述泥水混合物进行沉淀和净化 处理以得到可回排余水的泥水分离设备 30。 通过设置所述泥水分离设备 30以对 所述泥沙分离设备 20中分离出的泥水混合物进行静置沉淀和净化处理， 以得到 可回排的余水， 并将该可回排的余水排回河湖泊涌中进行循环利用。
[0051] 请参照图 4， 进一步地， 所述泥水分离设备 30包括用于储放所述可回排余水的 余水多级净化装置 40， 所述泥沙分离设备 20还包括连通于所述余水多级净化装 置 40与所述淋洗装置 25之间并抽取所述可回排余水以在所述淋洗装置 25内冲洗 所述沙料的抽水装置 26。 经所述泥水分离设备 30净化处理后产生的可回排余水 储放于所述余水多级净化装置 40， 并利用所述抽水装置 26将所述余水多级净化 装置 40内的可回排余水抽取至所述淋洗装置 25内以冲洗所述沙料， 实现水的再 利用， 避免资源浪费。
[0052] 请参照图 4， 进一步地， 所述泥沙分离设备 20还包括连通于所述淋洗装置 25与 所述沉沙装置 22之间并用于将冲洗沙料后的泥水混合物排放至所述沉沙装置 22 中的泥水回排装置 27。 通过设置所述泥水回排装置 27将冲洗所述沙料后产生的 泥水混合物回排至所述沉沙装置 22内进行沉淀， 以实现泥沙的再次沉淀和余水 的再生， 实现余沙的再生。
[0053] 请参照图 4， 进一步地， 所述河湖泊涌污染底泥处理余沙再生***还包括设置 于所述淋洗装置 25的出料口以用于将淋洗后的所述沙料运输至堆放场地的输送 皮带机 29。 所述河湖泊涌污染底泥处理余沙再生***通过设置所述输送皮带机 2 9以将淋洗后的所述沙料运送至堆放场地， 实现沙料的自动化处理。
[0054] 以上所述仅为本发明的较佳实施例而已， 并不用以限制本发明， 凡在本发明的 精神和原则之内所作的任何修改、 等同替换和改进等， 均应包含在本发明的保 护范围之内。

Claims

权利要求书
一种河湖泊涌污染底泥处理余沙再生***， 其特征在于， 包括： 垃圾分选设备， 所述垃圾分选设备用于对污染底泥进行垃圾分离并分 选出泥沙混合物；
泥沙分离设备， 所述泥沙分离设备用于对所述泥沙混合物进行沉淀以 得到可资源再生利用余沙， 其中， 所述泥沙分离设备包括对所述泥沙 混合物按颗粒粒径和密度进行收集和沉淀的沉沙装置、 对所述沉沙装 置中的沙料进行提取的提沙装置以及对所述提沙装置提取出的所述沙 料上的附着污染物进行冲洗的淋洗装置， 所述提沙装置设置于所述沉 沙装置与所述淋洗装置之间。
如权利要求 1所述的河湖泊涌污染底泥处理余沙再生***， 其特征在 于， 所述沉沙装置包括沿水流方向依次相通设置的集沙沟、 储沙坑和 溢流堰， 所述垃圾分选设备将所述泥沙混合物沿远离所述储沙坑的一 端输送至所述集沙沟， 所述储沙坑用于存放自然沉淀的沙料， 所述提 沙装置从所述储沙坑中提取所述沙料。
如权利要求 2所述的河湖泊涌污染底泥处理余沙再生***， 其特征在 于， 所述泥沙分离设备还包括安装于所述集沙沟内并沿逆水流方向运 转以将所述集沙沟内的沙料推入所述储沙坑内的刮沙机。
如权利要求 1至 3任意一项所述的河湖泊涌污染底泥处理余沙再生*** ， 其特征在于， 所述沉沙装置的数量为两个或者两个以上， 沿水流方 向的相邻两所述沉沙装置相互连通。
如权利要求 1所述的河湖泊涌污染底泥处理余沙再生***， 其特征在 于， 还包括设置于所述沉沙装置顶部并与所述沉沙装置之间形成密闭 空间以用于收集臭气的集气罩以及安装于所述集气罩内以使所述密闭 空间形成负压的风机。
如权利要求 5所述的河湖泊涌污染底泥处理余沙再生***， 其特征在 于， 所述垃圾分选设备包括用于对所述污染底泥中的垃圾进行分离和 分类的垃圾分选装置以及连通所述管道输送设备末端以收集所述污染 底泥采挖和输送过程中扩散的恶臭气体的臭气收集与处理装置， 所述 垃圾分选装置与所述沉沙装置连通， 所述集气罩的出气口连通至所述 臭气收集与处理装置的进气口。
如权利要求 1所述的河湖泊涌污染底泥处理余沙再生***， 其特征在 于， 还包括用于承接所述沉沙装置中流出的泥水混合物并对所述泥水 混合物进行沉淀和净化处理以得到可回排余水的泥水分离设备。 如权利要求 7所述的河湖泊涌污染底泥处理余沙再生***， 其特征在 于， 所述泥水分离设备包括用于储放所述可回排余水的余水多级净化 装置， 所述泥沙分离设备还包括连通于所述余水多级净化装置与所述 淋洗装置之间并抽取所述可回排余水以在所述淋洗装置内冲洗所述沙 料的抽水装置。
如权利要求 7所述的河湖泊涌污染底泥处理余沙再生***， 其特征在 于， 所述泥沙分离设备还包括连通于所述淋洗装置与所述沉沙装置之 间并用于将冲洗沙料后的泥水混合物排放至所述沉沙装置中的泥水回 排装置。
如权利要求 1所述的河湖泊涌污染底泥处理余沙再生***， 其特征在 于， 还包括设置于所述淋洗装置的出料口以用于将淋洗后的所述沙料 运输至堆放场地的输送皮带机。
PCT/CN2017/084965 2016-08-16 2017-05-18 河湖泊涌污染底泥处理余沙再生*** WO2018032833A1 (zh)

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