CN207138473U - A kind of sludge lagoon place original position Ecosystem restoration system - Google Patents

Abstract

The utility model discloses a kind of sludge lagoon place original position Ecosystem restoration system, it is characterised in that：Ecosystem restoration system supports soil layer, nutrition vegetable layer to combine by buoyancy layer, reinforcing layer, leachate collection system, gas gathering system, horizontal impervious layer, rain water collecting system, covering from bottom to up.The utility model can it is economical, Closure cover disposal fast and effectively is carried out to sludge lagoon, and can adapt to sludge digestion degraded and draw its sedimentation and deformation, improve, recovery sludge lagoon periphery ecological environment.

Description

A kind of sludge lagoon place original position Ecosystem restoration system

Technical field

It the utility model is related to municipal sludge sanitary landfills or non-hygiene landfill topple over formed sludge lagoon place original position Ecosystem restoration system, specifically a kind of sludge lagoon Closure cover structure, from it is lower on by buoyancy layer, reinforcing layer, diafiltration Liquid collection system, gas receive the composition portions such as system, horizontal impervious layer, rain water collecting system, covering support soil layer, nutrition vegetable layer Point.It is stable that the utility model is advantageous to gas and liquid collecting and auto-degradation in sludge lagoon, at the same can recover sludge lagoon itself and its Periphery ecological environment.

Background technology

22,000,000 tons of sludge discharges every year in municipal sewage plant of China at present, and is increased with every year about 10% speed, dirty Mud handles handling problems getting worse.Treatment of Sludge refers to sludge through cell process combined treatment, reach " minimizing, stabilisation, It is innoxious " overall process of purpose.Sludge treatment refers to sludge after treatment, throw aside with natural environment（Ground, underground, water In）Or recycle, final consumption mode steady in a long-term and being had no adverse effects to ecological environment can be reached.At present, sludge Processing mode mainly has the various ways such as sanitary landfills, land use, burning or recycling.Landfill stabilization small investment, fortune Row expense is low, and consumption amount is big, is the major way of current China's sludge treatment.But China's Sludge landfill mode is simple and crude, A large amount of sludge such as are not dehydrated, digested, stablize at the pretreatment, are filled moisture content, infiltration coefficient, shearing strength of sludge etc. and are referred to Mark is far from reaching《Urban wastewater treatment field specific resistance to filtration technical specification》In on sludge blended landfill and special fill out The index request buried.Sludge, which is toppled over, fills formed sludge lagoon（Hole）As artificial " marshland ", easily trigger and ask as follows Topic：（1）Take a large amount of soils of landfill yard；（2）The directly outdoor exposure of sludge sump, periphery lacks safety protection facility, safety be present Hidden danger；（3）Sewage sludge overflow, substantial amounts of toxic and harmful gas in sludge sump（Mainly include CH₄、NH₃、H₂S, stench etc.）Directly Connect and diffuse in air, cause sludge sump periphery ecological environment severe, direct threatening environment safety and public health.

Influence for solution sludge lagoon itself and its to periphery ecological environment, it is necessary to place ecology is carried out to sludge lagoon and repaiied It is multiple.Yet with sludge in sludge lagoon typically in fluidised form or stream modeling shape, have high-moisture, high organic content, high-compressibility, Hyposmosis coefficient, low shearing strength, and constantly carry out digestion degraded and produce many bad engineering characteristics such as landfill gas so that it is right The work of sludge lagoon site remediation is very intractable.In-situ treatment is carried out to sludge lagoon at present and disposes no effective method, is simply covered Fortifield village's envelope because sludge intensity is low, exist collapse, the potential safety hazard such as sludge piping；And filled out after in-situ solidifying or dystopy dehydrating and curing Burying has the shortcomings that long in time limit, occupation of land is big, secondary pollution is serious, investment is high, and project is not easy to implement.

Utility model content

For economy, fast and effectively to sludge lagoon progress place restoration of the ecosystem, its shadow to periphery ecological environment is reduced Ring, the utility model purpose is to provide reasonable in design, and ecological, environmental protective, investment is less, construction safety is convenient a kind of dirty Mire place original position Ecosystem restoration system, the in-situ immobilization disposal of sludge lagoon can be widely used in, make its periphery ecological Environment can effectively be recovered.

To achieve the above object, technical scheme is used by the utility model：A kind of sludge lagoon place original position ecology is repaiied Complex system, it is characterised in that：Ecosystem restoration system is from bottom to up by buoyancy layer, reinforcing layer, leachate collection system, gas collection System, horizontal impervious layer, rain water collecting system, covering support soil layer, nutrition vegetable layer to combine.

Preferably, described buoyancy layer is spliced to form entirety by some buoyancy plates, and buoyancy plate is by 20 ~ 40cm thickness polyethylene Cystosepiment respectively sets one layer of 1 ~ 3cm thickness plank to form up and down.

Preferably, the reinforcing layer has spinning geotechnique by the high intensity reinforcement of the double-deck vertically and transversely cross-linking arrangements of 300 ~ 400kN/m Cloth is formed, and reinforcement cloth is anchored into the anchoring groove of sludge lagoon periphery setting.

Preferably, leachate collection system includes vertically and horizontally leachate collection french drain, and vertically and horizontally leachate collection french drain is handed over Crunode sets leachate collection well, and leachate collection pipe, the leachate collection pipe are vertically and horizontally set in leachate collection french drain Leachate collection well is connected to, percolate conveys sewage by the elevator pump in leachate collection well or percolate discharge guiding pipe and adjusted Pond.

Preferably, gas gathering system is set on leachate collection french drain, and the gas gathering system is included along sludge The gas-collecting pipe of pool periphery laying, rubble is laid along gas-collecting pipe, outsourcing non-woven geotextile forms gas collection french drain； The geosynthetics network of rivers is laid on gas collection french drain and forms gas collection layer, soil engineering composite drainage network anchors into the anchoring of sludge lagoon periphery In ditch, gas-collecting pipe is connected by gas discharge guiding pipe with gas discharging apparatus.

Preferably, the horizontal impervious layer is one layer of 1.5mmLLDPE or HDPE geomembrane, and geomembrane anchors into sludge lagoon week In the anchoring groove of side.

Preferably, rain water collecting system includes being covered in the soil engineering composite drainage network on horizontal impervious layer, and in geotechnique Composite, water-drain sets longitudinally, laterally rainwater-collecting french drain on the net, and longitudinally, laterally the access of rainwater collection collector is dirty in rainwater-collecting french drain The rain collection well set in mire, imported by rainwater discharge guiding pipe or elevator pump in the surface water channel of sludge lagoon periphery.

Preferably, covering supports soil layer to be made up of thickness more than 450mm clay compactions, soil layer infiltration coefficient should be greater than 1 × 10^-4cm/s。

Preferably, nutrition vegetable layer is vegetation growth nutritive layer, and should be greater than the cultivated soil of planting of 150mm by thickness is formed.

The utility model can it is economical, Closure cover disposal fast and effectively is carried out to sludge lagoon, and can adapt to sludge Its sedimentation and deformation is drawn in digestion degraded, improves, recovers sludge lagoon periphery ecological environment.The utility model has the advantage that It is：

1）It is low can effectively to solve sludge lagoon foundation bearing capacity, construction machinery, workmen's safety problem；

2）Closure cover structure can bear itself load, avoid sludge lagoon from being caused after closing under uneven load action Sludge gushes, collapsed outside, and structure is safe and reliable；

3）The organized collection guide of percolate, landfill gas after closing in sludge lagoon, is advantageous to digesting, stably for sludge Change；Meanwhile it can effectively avoid sewage, foul smell extravasation pollution surrounding enviroment；

4）The Closure cover system can prevent rainwater, surface water from entering in sludge lagoon, reduce diafiltration output of fluid；

5）The Closure cover system is adapted to the caused sedimentation and deformation of sludge degradation digestion, avoids antiseepage film stretching from breaking It is bad；

6）The Closure cover system can recover sludge lagoon periphery ecological environment, landscape planting, and ecological benefits are good.

Brief description of the drawings

Fig. 1 is sludge lagoon original position Ecosystem restoration system plan.

Fig. 2 is the A-A profiles in Fig. 1.

Fig. 3 is the B-B profiles in Fig. 1.

Fig. 4 is the utility model buoyancy layer cystosepiment connection detail drawing.

Fig. 5 is the detail drawing of buoyancy layer cystosepiment connecting portion in Fig. 4.

Fig. 6 is the utility model leachate collection well construction detail drawing.

Fig. 7 is the C-C profiles in Fig. 1, is the utility model percolate and rainwater-collecting french drain detail drawing.

Fig. 8 is the D-D profiles in Fig. 1.

Fig. 9 is the utility model rain collection well detail of construction.

Embodiment

Illustrate embodiment of the present utility model, the skill of this area below by way of specific instantiation and with reference to accompanying drawing Art personnel can be understood further advantage and effect of the present utility model easily by content disclosed in the present specification.The utility model Also it can be implemented or be applied by other different instantiations, every details in the utility model can also be based on different sights Point and application, various modifications and change are carried out under without departing substantially from spirit of the present utility model.

As shown in Figure 1.It is as follows to the function and structure of lower and upper each layer：

Buoyancy layer 1：For sludge 11 typically in fluidised form or stream plastic state, its own intensity is extremely low, is consolidated in sludge in sludge lagoon Before can not be formed construction operation platform and carrying construction operation load.Buoyancy layer is laid on sludge lagoon top layer, buoyancy layer is by buoyancy Plate splicing is integral, as shown in Figure 2,3.Buoyancy plate described in the utility model is by 20 ~ 40cm thickness polyethylene foam sheet about 12 Respectively set one layer of 1 ~ 3cm thickness plank 13 to form, junction steel plate is set respectively in the top and bottom of adjacent buoyant plate junction 14, buoyancy layer is integrally formed to wearing the connection of junction steel plate 14 by bolt 15 between each block of buoyancy plate.Buoyancy plate planar dimension, spiral shell Bolt specifications and models and junction steel plate dimensional thickness meet the shaping that cystosepiment is connected with wooden splint, such as Fig. 4 and Fig. 5 institutes Show.

Reinforcing layer 2：In order to support itself load of Closure cover system, reinforcing layer is laid in buoyancy layer surface.This practicality is new Reinforcing layer described in type is made up of the high intensity reinforcement Woven geofabric 21 of the double-deck vertically and transversely cross-linking arrangements of 300 ~ 400kN/m, reinforcement Cloth is anchored into the anchoring groove 9 of sludge lagoon periphery setting, and reserved certain amount of tension, and amount of tension is estimating after sludge lagoon closes Deformation of sedimentation, triggered sedimentation and deformation of degrading can be adapted to.As shown in Figure 2,3.

Leachate collection system 3：In order to effectively collect close after percolate in sludge lagoon, promote sludge lagoon to stabilize, Leachate collection system is set on reinforcing layer, as described in Figure 2.Leachate collection system described in the utility model is by being vertically and horizontally percolated Liquid collects french drain 31, leachate collection well 32 forms, as shown in Figure 1.Vertically and horizontally leachate collection french drain crosspoint sets diafiltration Liquid collects well 32, and leachate collection pipe 33 is connected to leachate collection well 32 in leachate collection french drain 31, and percolate is by oozing Filtrate collects elevator pump or percolate discharge guiding pipe conveying sewage regulating reservoir in well, as shown in Fig. 1, Fig. 6.It is described in the utility model Leachate collection french drain wraps up HDPE leachate collections pipe 33 by 20 ~ 40mm graded broken stones, and rubble outsourcing non-woven geotextile forms, As shown in Figure 6.Leachate collection pipe described in the utility model is HDPE perforated pipes, pipe diameter size and percent opening according to percolate water Size is measured to determine.Leachate collection well 32 described in the utility model is by DE1000 HDPE prefabricated wells, and shaft bottom is using certain thickness HDPE shroudings are sealed, and Jing Ding is covered using the prefabricated membrane covers 35 of certain thickness HDPE, as shown in Figure 6.

Gas gathering system 4：In order to effectively collect close after gas caused by sludge digestion degraded in sludge lagoon, be percolated Liquid is collected and sets gas gathering system on french drain, as shown in Figure 2,3.Gas gathering system described in the utility model is by geosynthetics Drainage network 41, gas collection french drain 42, gas discharge guiding pipe 43, gas discharging apparatus 44 form, as shown in Figure 1.Disappear in sludge lagoon Gas caused by changing degraded enters gas collection french drain by soil engineering composite drainage network, is arranged eventually through gas discharge guiding pipe by gas Device discharge is put, as shown in Figure 8.Soil engineering composite drainage network need to be anchored into sludge lagoon periphery anchoring groove 9, and reserved certain sedimentation Deform amount of tension.Gas collection french drain 42 described in the utility model wraps up HDPE gas-collecting pipes 45 by 20 ~ 40mm graded broken stones, Rubble outsourcing non-woven geotextile forms, as shown in Figure 2.Gas-collecting pipe described in the utility model is HDPE perforated pipes, and caliber is big Small and percent opening determines according to gas flow size.Gas discharge guiding pipe described in the utility model is HDPE solid wall pipes, pipe diameter size root Determined according to gas flow size.Gas discharging apparatus described in the utility model is by blast pipe 46, gas check valve 47, Unpowered ventilation Device 48 forms, and the bottom of blast pipe 46 is led to by reducing two connects gas discharge guiding pipe 43, top installation air bleeding valve and Unpowered ventilation Device 48, gas check valve 47, the uniform anti-corrosion steel wire in blast pipe periphery are set in Unpowered ventilation device 48 and the junction of blast pipe 46 Rope, blast pipe are fixed by anti-corrosion steel wire rope 49, and windproof drawing is destroyed, as shown in Figure 8.

Horizontal impervious layer 5：In order to prevent rainwater and surface water from entering in sludge lagoon, while gas is obstructed in sludge lagoon without group Knit into ambient air, horizontal impervious layer is laid on gas collection layer.Horizontal impervious layer described in the utility model is one layer 1.5mmLLDPE or HDPE geomembranes 51, geomembrane are anchored into sludge lagoon periphery anchoring groove 9, and reserved certain sedimentation and deformation is drawn The amount of stretching, as shown in Figure 2,3.

Rainwater guide system 6：Go deep into collect rainfall in sludge lagoon Closure cover structure sheaf top covering support soil layer Rainwater, on horizontal impervious layer set rainwater guide system.Rainwater-collecting guide system described in the utility model is by geotechnique 63 groups of composite drainage network 61, rainwater-collecting french drain 62, rain collection well layers, as shown in Figure 1.Soil engineering composite drainage network 61, covering On impervious barrier, and longitudinally, laterally rainwater-collecting french drain is set on soil engineering composite drainage network, rainwater in rainwater-collecting french drain The rain collection well set in collecting pipe access sludge lagoon, sludge lagoon periphery draining is imported by rainwater discharge guiding pipe 64 or elevator pump In open channel or gutter 65, as Fig. 1,8 show.Rainwater-collecting french drain described in the utility model wraps up rain by 20 ~ 40mm graded broken stones Water collection pipe 66, rubble outsourcing non-woven geotextile composition, as shown in Figure 4.Rainwater collection collector described in the utility model is worn for HDPE Determination is deeply measured in Kong Guan, pipe diameter size and perforate filter according to rainwater.Rain collection well described in the utility model is by DE1000 HDPE Prefabricated well, shaft bottom are sealed using certain thickness HDPE shroudings, and Jing Ding is covered using the prefabricated membrane covers 67 of 2.0mm HDPE, such as Fig. 8 It is shown.

Soil layer 7 is supported in covering：Top Nutrition Soil is supported, is made up of thickness more than 450mm clay compactions, soil layer infiltration coefficient It should be greater than 1 × 10^-4Cm/s, as shown in Figure 2,3.

Nutrition vegetable layer 8：For vegetation growth nutritive layer, the cultivated soil of planting of 150mm should be greater than by thickness and form, soil material Ying Li In vegetation growth, as shown in Figure 2,3.

Maintenance road 10 is set around the sludge lagoon, and is connected with extraneous road.

Main implementation process of the present utility model is as follows：Top layer vegetation garbage-cleaning, sewage pump drainage → build anchoring groove → Installation laying buoyancy layer → laying reinforcing layer → installation laying leachate collection guide system → laying gas collection layer → laying Soil layer → nutrition vegetable layer → green grass, restoration of the ecosystem are supported in impervious barrier → installation laying rainwater-collecting layer → laying covering.

Before sludge lagoon Closure cover is implemented, top layer vegetation in sludge lagoon, rubbish should be removed first, and in sludge lagoon Top layer supernatant carries out pump drainage, then builds builder's road and anchoring groove along sludge lagoon periphery.Utilize wooden splint, steel plate, bolt Cystosepiment is connected to overall, formation buoyancy layer.Pre-buried leachate collection well, gas discharge guiding pipe, rain collection well in precalculated position, After rainwater discharge guiding pipe, 2 floor height intensity reinforced geotextiles are laid.Reinforced geotextile suggests two width for laying unit（Wide 10m）, inciting somebody to action Geotextiles carry out sewing up for two width geotextiles during being stretched toward sludge face, being seamed on sludge face between each laying unit Carry out.Longitudinal geotextiles are first laid, re-lay horizontal geotextiles.Before geotextiles anchoring, geotextiles in field should be made as far as possible loose, in advance Stay certain sedimentation and deformation amount of tension.The HDPE leachate collection pipes of laying installation perforation in the middle part of sludge lagoon, and received with percolate Ji Jing connections, rubble is laid along leachate collection pipe, outsourcing non-woven geotextile forms leachate collection french drain.Along sludge lagoon periphery The HDPE gas-collecting pipes of laying installation perforation, and be connected with gas discharge guiding pipe by elbow bend；Laid along gas-collecting pipe Rubble, outsourcing non-woven geotextile form gas collection french drain；The geosynthetics network of rivers is laid on gas collection french drain and forms gas Collecting layer, the transverse lap width of adjacent geonet are not less than 100mm, and the lap width of longitudinal end is not less than 150mm, geotechnique Certain sedimentation and deformation amount of tension is reserved at composite drainage network both ends, and is anchored into anchoring groove.Install gas discharging apparatus, and with it is pre-buried Gas discharge guiding pipe connection.HDPE film or LLDPE film horizontal impervious layer are laid, certain sedimentation and deformation stretching is reserved at antiseepage film both ends Amount, and anchor into anchoring groove.Sealed between every width antiseepage film by sweat soldering, lap width is not less than 150mm, seam Place should avoid producing wrinkle as far as possible.Soil engineering composite drainage network is laid in antiseepage film and forms drainage blanket, laying is required with exhaust Layer.The HDPE rainwater collection collectors of laying installation perforation on sludge lagoon medium position, soil engineering composite drainage network, and and rainwater-collecting Well connects, and lays rubble along rainwater collection collector, outsourcing non-woven geotextile forms rainwater-collecting french drain.Soil layer and nutrition are supported in covering Soil, and be compacted.The closing greening of Closure cover nutrition vegetable layer should mutually be coordinated with surrounding landscape, and according to soil thickness, soil Earth property, weather conditions etc. carry out plants configuration.

Above-mentioned embodiment is used for illustrating the utility model, rather than the utility model is limited, Spirit of the present utility model and any modifications and changes in scope of the claims, made to the utility model, all fall Enter the scope of protection of the utility model.

Claims (9)

1. A kind of 1. sludge lagoon place original position Ecosystem restoration system, it is characterised in that：Ecosystem restoration system from bottom to up by buoyancy layer, Soil layer, nutrition are supported in reinforcing layer, leachate collection system, gas gathering system, horizontal impervious layer, rain water collecting system, covering Vegetable layer combines.
2. A kind of 2. sludge lagoon place original position according to claim 1 Ecosystem restoration system, it is characterised in that：Described buoyancy Layer is spliced to form entirety by some buoyancy plates, and buoyancy plate respectively sets one layer of 1 ~ 3cm up and down by 20 ~ 40cm thickness polyethylene foam sheet Thickness plank forms.
3. A kind of 3. sludge lagoon place original position according to claim 1 Ecosystem restoration system, it is characterised in that：The reinforcing layer It is made up of the high intensity reinforcement Woven geofabric of the double-deck vertically and transversely cross-linking arrangements of 300 ~ 400kN/m, reinforcement cloth anchors into sludge lagoon week In the anchoring groove that side is set.
4. A kind of 4. sludge lagoon place original position according to claim 1 Ecosystem restoration system, it is characterised in that：Leachate collection System includes vertically and horizontally leachate collection french drain, and vertically and horizontally leachate collection french drain crosspoint sets leachate collection well, in length and breadth Leachate collection pipe is set into leachate collection french drain, and the leachate collection pipe is connected to leachate collection well, percolate Sewage regulating reservoir is conveyed by the elevator pump in leachate collection well or percolate discharge guiding pipe.
5. A kind of 5. sludge lagoon place original position according to claim 1 Ecosystem restoration system, it is characterised in that：Received in percolate Gas gathering system is set on collection french drain, and the gas gathering system includes the gas-collecting pipe laid along sludge lagoon periphery, edge Gas-collecting pipe lays rubble, and outsourcing non-woven geotextile forms gas collection french drain；It is multiple that geotechnique is laid on gas collection french drain Heshui net forms gas collection layer, and soil engineering composite drainage network is anchored into the anchoring groove of sludge lagoon periphery, and gas-collecting pipe passes through gas Discharge guiding pipe is connected with gas discharging apparatus.
6. A kind of 6. sludge lagoon place original position according to claim 1 Ecosystem restoration system, it is characterised in that：It is described horizontal anti- Infiltration layer is one layer of 1.5mmLLDPE or HDPE geomembrane, and geomembrane is anchored into the anchoring groove of sludge lagoon periphery.
7. A kind of 7. sludge lagoon place original position according to claim 1 Ecosystem restoration system, it is characterised in that：Rainwater-collecting system System includes being covered in the soil engineering composite drainage network on horizontal impervious layer, and is set longitudinally, laterally on soil engineering composite drainage network Rainwater-collecting french drain, the rain collection well longitudinally, laterally set in rainwater-collecting french drain in rainwater collection collector access sludge lagoon, leads to Cross rainwater discharge guiding pipe or elevator pump is imported in the surface water channel of sludge lagoon periphery.
8. A kind of 8. sludge lagoon place original position according to claim 1 Ecosystem restoration system, it is characterised in that：Soil is supported in covering Layer is made up of thickness more than 450mm clay compactions, and soil layer infiltration coefficient should be greater than 1 × 10-4cm/s.
9. A kind of 9. sludge lagoon place original position according to claim 1 Ecosystem restoration system, it is characterised in that：Nutrition vegetable layer For vegetation growth nutritive layer, the cultivated soil of planting of 150mm should be greater than by thickness and form.