CN106698871A

CN106698871A - Innocuous dredging decrement and dehydration processing method

Info

Publication number: CN106698871A
Application number: CN201510793655.3A
Authority: CN
Inventors: 杨励昌; 杨志兴; 杨振兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-16
Filing date: 2015-11-16
Publication date: 2017-05-24

Abstract

The invention relates to an innocuous dredging decrement and dehydration processing method which comprises the following steps of flushing sludge from lakes and reservoirs until mud is separated from sandstone, wherein the first decrement is at least 10%; conveying the separated mud into a mud sump by virtue of a pipeline, and adding an FSA mud and sand coagulation agent for separation; then pumping slurry into an aeration tank, performing gas making by use of a blast gas pump unit, wherein the aeration amount per hour is 1800 m<3>, and the oxygen content is 378m<3>; performing continuous aeration catalysis and degradation on slurry organic pollutants; then dishcharging into an open channel, sieving, flowing through a canal bed, performing high-intensity ultraviolet sterilization, adding 5-20Kg of HEC consolidation agent for per m<3> of the slurry, enabling the slurry to flow into an equalizing tank through a channel, and regulating the water content to 80%; then pumping the slurry into a squeezer, performing dehydration, performing primary cramping for 60 minutes so as to produce plate-shaped consolidated matters, wherein within one day, the water content is 25.5%, the second decrement is 55%, and the longer the cooling time is, the lower the water content is, and the less the decrement is. The method has the advantages that after the sludge is processed, the decrement is high, harmless recycling of consolidated soil is realized, and the consolidated soil can be directly used for engineering backfilling, slope paving and landscaping planting soil.

Description

A kind of desilting mud decrement, harmless, dehydration utilize processing method

Technical field

The present invention relates to the machine that dredging desilting, decrement, harmless, recycling, low cost are gushed in ecological environment reparation and Hu Ku rivers Tool external force press dewatering solidifying integrated treatment method.

Background technology

With industrial and agricultural production, expanding economy and city collection shape, the growth of population, residing Regional Erosion and Hu Ku, river gush long-pending silt and are continuously increased, and soil and water resources are contaminated, and storage capacity of controlling flood and draining flooded fields weakens, after navigation channel atrophy is not smooth Really；People constantly explore Hu Ku, river and gush administering method measure, such as strengthened purification technology in recent years, water plant repair and reconstruction, The measures such as Sediment Dredging, the treatment of desilting strange land, wherein the treatment of Sediment Dredging strange land is to administer one of important measures, and mud is appropriate Treatment and place to go are even more and make us constantly probing into, and its decrement, harmless, resource regeneration are circulated, the strange land of low cost is processed, disposal is can The direction of sustainable development.

Traditional process for treating sludge is following several to having greatly：

1. off-lying sea is unloaded and is abandoned, and Shenzhen riverway sludge place to go is Zhuhai Huang Maohai, has infringement marine organisms ecological.

2. using air dry, naturally stiff, directly landfill adverse environment protection requirement after the solidification of Dongguan City riverway sludge, and take With waste land resource.

3. burn using handy less efficient with low temperature pyrogenation, only adapt to certain composition mud, fail to widely apply, high cost, And bed mud is burned and also has generation dioxin, burned product building materials have harm because content of beary metal is higher to health.

4. a kind of contaminated bottom sediment remediation agent is well mixed nature and banks up with bed mud after dehydration, it is clear that worked when solidfied material is well mixed Amount is big, is stacked with land occupation resource, and bed mud organic pollution, heavy metal do not do harmless treatment, bed mud place to go original place all the time It is pending.

5. clear slurry dewatering and solidifying integrated treatment method, should not be directly used in engineering earth, only by harmless after output Change treatment and it is innoxious less than or wait that backfill is inorganic and the environmental quality secondary standard of organic pollution and toxicity of lixivium is low In standard value then for pollution-free, could be directly as engineering utilization soil.

The content of the invention

For being inadequate in existing sludge treatment technology, decrement it is unobvious, pollutant, the weight contained in mud The treatment of metal leachate is not up to inorganic pollution, the environment secondary standard of organic pollution and mud toxicity of lixivium and differentiates mark Standard, the utilization of output solidfied material band evil, or processing cost are too high, economization is unreasonable, and recycling is more without substance Break through；The present invention proposes a kind of 1 minimizing, 2 innoxious, 3 resources, the processing method of the four-in-one of 4 economizations, can obtain Further effect.The method of described decrement, harmless, resources circulation and low-cost processes is comprised the following steps：

First, a kind of river Yong Hu storehouses desilting decrement method：

(1) desilting of semi-wet formula or wet type desilting is to take high-pressure pump or suction mud equipment at bed mud scene, rinses or stirs Mix that bed mud is mixed to be richer than water, mud sump concentration is taken out in flow direction setting, and sand gravel sinks to the bottom separations, that is, scene decrement for the first time 10%-30%.

(2) mud that will be branched away conveys strange land with high pressure slurry pump connecting pipe (by middle indirect force pond during long range) Treatment stations storage basin.

(3) 0.005kg (FSA) silt is added to sink poly- the agent, (patent No. by every cube of mud when mud enters Treatment stations storage basin ZL200610166513.5 mud-water separation) is done, the clay that particle diameter is 0.005~0.025MM is isolated, then using mud pumping Enter mud aeration oxygen replenishing pond.

2nd, a kind of mud aeration and catalyzing, oxygenation contamination reducing method：Many poisonous and harmfuls have been adsorbed in gushing bed mud due to Hu Ku rivers Material, the long-term reducing condition in alluvial area, for microorganism provides anaerobic environment so that dissolved oxygen decline, hydrogen sulfide, mercaptan, The harmful substance contents such as pyrimidine and ammonia nitrogen rise, and especially some heavy metal Recalcitrant chemicals matter are easy to deposit and delay Slowly be discharged into mud, however under anaerobic river bottom mud high volence metal ion such as Fe and Mn etc. be reduced to it is low Valency ion sulphur as present in Fe2+, Mn2+ and mud chemically reacts, and forms atrament such as FeS and MhS of stabilization etc. Pollutant.This method is by artificial gas making catalysis and reoxygenation technology, namely uses aeration and catalyzing mud organic pollution, and To be completely dissolved in slurries containing 21% oxygen in gas, Organic Pollution in can reducing mud under high intensity aeration and catalyzing The concentration 20%~50% of thing, improves liquid mud body dissolved oxygen concentration and transmission, promotes liquid mixing reducing condition.

Mud aeration tank length and width 15M*15M, 4M high, using reinforced concrete shear wall retaining wall.

In aeration oxygen replenishing pond surroundings wall bottom, installation diameter 110MM steel is emanated and is responsible for and connects medial fascicle aeration Pipe, end connection control air valve, instrument regulation tolerance are micro- every 3M one diameter 50MM steel of longitudinal and transverse direction installation in the middle of bottom of pond Hole aeration branch pipe, and lateral hole of emanating is made every 500MM along pipe range, aperture 2MM is uniform to mud aeration in pond.

A 11KW whirlpools air pump connection aeration supervisor is respectively installed in Chi Ding both sides, and installs control valve, flowmeter and instrument Table, using continous way aeration mode, maximum positive voltage 65KPa, peak suction 48KPa.

Mud moisture content is adjusted during aeration to 80%, is beneficial to gas aeration and is facilitated uniformly.

, with 1800 cubic metres of gas processed per hour, wherein 378 cubic metres of uniform dissolutions of oxygen content are in mud for two whirlpool air pumps In, oxygen weight (20C °) 487.6Kg/h in aeration, coefficient of oxygen utilization is more than 30%, can within a short period of time be catalyzed pollutant and carry High dissolved oxygen levels, promote the absorption and ion exchange of mineral matter, so that further for ultraviolet sterilization provides condition.

One 1.5M wide, 10M long, 0.8M ultraviolet modules equipment open channel high connection mud homogenizing are set behind oxygenation aeration pond Pond.

3rd, a kind of slurry liquid KCW/V ultraviolet sterilizing methods：After aeration oxygen replenishing mud flow into open channel sieving machine and by The sterilizer that open channel bottom is installed carries out high-intensity ultraviolet (UV) sterilization algal control, and ultraviolet makes big to bacterium or cell irradiation Nucleic acid molecules in the main component nucleoprotein of amount bacterium or cell, because largely absorbing ultraviolets the change of generation property, its physiology is lived Property it is destroyed, and the OH with strong oxidizing property is produced by ultraviolet lasing, with persistent organic pollutants molecule COD, TN, TP etc. Chemically react, be allowed to be decomposed into small molecule legibility material or CO₂And H₂O, can play to microorganism, ozone, bacterium and fungi Algal control and killing action, and deodorant, taste removal, the effect decolourized can be played.

Electrical equipment technology data：Power supply uses three-phase and four-line AC380V, 400Hz, voltage 220V/380V, input Switch box and multiple grounding is done, output connection sterilizer switch board.

Ultraviolet equipment system installs 5 modules altogether, and each module is immediately arranged before and after being divided into along following current horizontal direction, each Module is installed 10 rows, often arranges 2 100W ultraviolet Cs (254nm) import low-pressure high-strength fluorescent tubes, and every arranges every 10*10CM spacing Composition, output general power 10KW.

Electric ballast and contactor are arranged in electrical control cubicles, and electrical control cubicles degree of protection is not less than IP54, using three-phase four Failure electronic detection circuit is set in line power supply mode, electric ballast, when ultraviolet mercury fluorescent tube or ballast break down, is first closed General supply, then overhaul.

Installation process：Ultraviolet sterilization system is installed in open type sterilization open channel, and ultraviolet mercury fluorescent tube is horizontally arranged in bright In canal, apart from canal bottom 100MM, the parallel connection discharge consistent with mud flow of ultraviolet mercury fluorescent tube, and spacing phase is arranged between mercury lamp pipe Equalization, fluorescent tube spacing is 100MM*100MM, allows in 10M open channels 5 reirradiations, has through flowing each space of mud Even ultraviolet light quantity shoots bacterium to death, to keep the sterilized effect of algae restraint of stabilization.

Each system module is made of 307 stainless steels, and crust size is length 1500*1500*300MM, totally 5 Module, using open installed in mud excessively stream open channel bottom, under often row group lamp being lifted or inserted during maintenance, both installed concentratedly Convenient maintenance again.

System operation can irradiate 80 cubic metres of mud amounts passed through through open channel per hour, and 1500 cubes of mud can be processed daily More than rice, and silt slurry by sterilizing rate more than 99% enters balancing reservoir.

4th, a kind of mud decrement, the solidifying integrated method of harmless, mechanical dehydration are comprised the following steps：1 is clear from river Yong Hu storehouses Strange land Treatment stations storage basin is pumped after the decrement of mud scene, mud-water separation, 3 pumping aeration oxygen replenishings are made in 2 plus FSA silt coagulation agent Pond, 4 discharges flow into the sterilization of Open channel UV light through sieving machine, 5, and 6 add HEC consolidating agents to enter balancing reservoir, 7 pumpings to squeezing simultaneously Machine clamps dehydration, output sheet solidfied material, tail water and recycles, and 8 then scraper is to engineering backfill and is compacted or makees planting soil.

Above-mentioned dosing HEC mixes and matches somebody with somebody：Equipment open channel is transferred to by metering device pump from curing agent holding vessel, with every cubic metre of mud Slurry adds 5~20KgHEC patented product (certificate numbers：2003ED760040) high strong water resistant soil solidifying agent, sieves bright by equipment Canal flows into 15M*15M*4M balancing reservoirs, and it is 80% to adjust moisture content.

Said pump is extracted into outer power squeezer and clamps dehydration：Once clamp 60 minutes output sheet solidfied materials, second decrement 55% (volume ratio).

Above-mentioned output sheet solidfied material is parked and measures within 24 hours average moisture content less than 25.5%, and the storage period is more long, contains Water rate is lower.

Above-mentioned is harmless tail water after ultraviolet-sterilization, less than GB3838-2002《Water environment quality standard》V class water gauges Standard, can reuse into circulating water pool, or harmless emission.

5th, a kind of harmless mud press dewatering technical matters is included：River is gushed, lake storehouse desilting mud feed system；Storage mud and material Powder supplies metering system；Aeration system；UV germicidal system；Mechanical dehydration system and consolidation soil resource utilize six parts； River Yong Hu storehouses desilting system comprising scene dredging desilting mud, sandstone separate decrement, pump piping give, relay pond, to strange land Treatment stations Storage basin；Storage mud and powder supplying system include mud storage basin, aeration oxygen replenishing pond, mud balancing reservoir, dosing storage warehouse, automatic Feeding device and metering display, the agent of incorporation FSA silt coagulations, addition HEC curing agent；Aeration system includes 11KW whirlpools Air pump 2 and aerated conduit, control valve and meter, aeration 1800M³/ hour, wherein oxygen-containing 378M³Input aeration tank；It is purple Outer disinfection system includes 10M open channels, mud sieving machine, Open channel UV line sterilizer and corollary system；Mechanical dehydration system is included Slush pump, air compressor machine and pressure storage, factory building, press machines dehydration, hydraulic pressure and corollary equipment；Solidfied material engineering utilization part Comprising output solidification tablet, loading machinery and haulage vehicle, engineering machinery compaction process.

Brief description of the drawings

Fig. 1~Fig. 9 is this engineering invented technology flow chart.

Tu1Yuan roads shape sludge extraction；Fig. 2 pump pressure sludge pipeline conveying strange land Treatment stations；Fig. 3 mud aeration and catalyzing, oxygenation dilution COD pollutants；It is sterilized by Open channel UV after Fig. 4 aerations；Fig. 5 mechanism filter-pressings are dehydrated；Enter homogenizing after the sterilization of Fig. 6 silt slurries； Fig. 7 mechanical expressions are dehydrated discharging；Fig. 8 silt consolidation thing entruckings are transported；The native bank protection of Fig. 9 outputs consolidation is reinforced.

Specific embodiment

Dongguan City river engineering test examples：

6th, minimizing, operating process of the present invention and test examples：This experiment measures the length of 20M*25M, thickness 1M in riverbed 50 cubic metres of mud of cube, first time decrement is：10% is accounted for by rinsing separation sand, 9.96 cubic metres of gravel debris, then will The mud pipeline for collecting mud sump is pumped into Treatment stations storage basin.

Every cubic metre of mud adds 0.005KgFSA silts to sink poly- agent and does mud-water separation, and then pumping mud is to aeration oxygen replenishing Pond.

Air blast air pump gas 1800m processed per hour³Carry out aeration oxygen replenishing catalysis, degradation of contaminant COD concentration to 20%~ 50%.

Ultraviolet light (UV) high intensity sterilizing is carried out through flowing to sieving machine and sterilizer by equipment open channel, is entered Change pond.

HEC every cubic metre of mud 10Kg of curing agent is mixed, balancing reservoir is flowed into by open channel, adjust moisture content to 80%, most Pumping mud clamps dehydration, 18 cubic metres of sheet solidfied materials of output to outer power squeezer afterwards, it is clear that second decrement 55%, one day Moisture content 25.5% is inside measured, cool time longer moisture content of putting is less, and tail water is recycled.

7th, it is innoxious：Innoxious is that output consolidation thing, through inspection, meets national standard GS18598-2001 after sludge treatment Hazard waste landfill Environmental capacity standard.This method is using air blast air pump 1800 cubic metres/h of gas, wherein vertical containing pure oxygen 378 Square rice/h, carries out catalysis and reoxygenation treatment, and slurries improve the dissolving of liquid mud body by aeration and catalyzing and reoxygenation reduction organic pollution Oxygen concentration, then carries out ultraviolet light high intensity sterilization more than 99%, makes pollutant catabolic gene in mud toxicity of lixivium standard value model In enclosing, sludge dewatering consolidation thing innocuity test is included：It is total cadmium, total mercury, total arsenic, total lead, total chromium, sexavalence lattice, total copper, total nickel, total Zinc is essential items for inspection, and solidification output object mud leaching characteristic identification standard value meets national GB18598-2001 hazard waste landfills Environmental capacity standard, and native pollutant index is consolidated less than or equal to backfill is inorganic and the environmental quality of organic pollution the Secondary standard value, and toxicity of lixivium differentiates and is less than GB5085.3 standard values, then for pollution-free.Mud after treatment can directly be made For industry, business, inhabitation backfill and planting technique soil, but need to be according to different regions, different soils and environmental condition Difference and be applicable place various criterion.

The leaching method and analysis method of mud toxicant are performed by the regulation of standard GB/T 5085.3.

Mud leaching characteristic identification standard value GB5085.3, table one

Organic mercury, inorganic fluorine thing (not including fluorine calcium), cyanide (in terms of CN)

Silt consolidation thing meets national standard GS18598-2001 hazard waste landfill Environmental capacity standards through inspection.

Dongguan City river engineering examining report SZGD20130315-6 silt consolidation analyte detection results：Table two

Sequence number	Detection project	Testing result	Unit
				1	PH value	7.82	-
2	Moisture content	11.01	%
				3	Cadmium	＜ 0.008	Mg/L
4	Total chromium	0.01	Mg/L
				5	Mercury	0.0256	Mg/L
6	Cr VI	＜ 0.004	Mg/L
				7	Nickel	0.17	Mg/L
8	Lead	＜ 0.08	Mg/L
				9	Arsenic	0.0091	Mg/L
10	Copper	0.60	Mg/L
				11	Alkyl mercury	Do not detect	Mg/L
12	Zinc	0.04	Mg/L

Dongguan City river engineering sludge solidification detects overall assessment table：

Table three

According to detection result indicator corresponding standard value, before heavy metal in sludge content after cured treatment is than curing process Comprehensive to reduce 59.82%, wherein lead decrement is more, reaches 99.9%, and minimum total chromium is reduced up to 12.5%, totally meets conjunction Case marker is accurate.

8th, resource：Output solidfied material is naturally cool, and to put 72 hours moisture content be 23.3%, now using excavator dress soil, Dumper muck haulage is backfilled to engineering site, and every 400MM through compacting one time, packing is more than 0.92, pressure resistance to thickness after compacting 28 days f of degree are more than 100kPa.

Dongguan City river engineering consolidates output object examining report：Code T 2013-045 tables four

Silt consolidation thing compactness inspection report YSD2013B081, execution specification SL237-1999 tables five

According to consolidation earthen backfill soil result of the test, compression strength f is more than 100KPa, and shearing strength is internal friction angle Φ ＞ 150 °, compressed coefficient α_1-2＜ 0.05MPa^-1, osmotic coefficient k ＜ 10^-4Cm/s, characteristic value of foundation bearing capacity fak ＞ 100KPa, Gu Compound performance indications meet the requirement of bank slope backfill.

Dongguan City river engineering is implemented to follow these steps to：

1 Dongguan City river course is implemented after success of the test, and river course is long 3.2 kilometers, average river width 78M, and product is become silted up thick 0.9M~1.9M, desilting amount is 257800 cubic metres, using semi-wet formula desilting, except the grit stone amount of accounting for is isolated at scene 58700M³Outward, remaining 199100M³Product silt is impacted with high-pressure pump and be richer than water, then pump piping and stored up through relay transport process Mud sump.

2 every cubic metre of mud add 0.005KgFSA silts to sink poly- agent and denitrogenate separation.

3 slurry-suckings enter aeration tank, using whirlpool air pump gas 1800M³/ h carries out continous way catalysis to mud, and by gas Oxygen-containing 378M in body³/ h is dissolved in slurries, can be catalyzed and reduce heavy metal contaminants concentration 20%~50% in the short period.

4 mud enter sieving machine through Open channel UV light sterilizer sterilizing after aeration oxygen replenishing catalysis drop dirt, through flowing mud Starch sterilizing rate up to more than 99%.

5 mud are mixed with 10Kg and enter balancing reservoir through open channel dosing HEC every cube of mud of consolidating agent.

6 pumping mud are dehydrated to squeezer, clamp every time and unload within 60 minutes consolidation thing and be carried out continuously, and every production line is produced Output is daily 130M3, installs three production lines daily by output 390M³。

7 amount to output consolidation thing 82300M³, decrement 58.66%, average moisture content 26.05%.

8 outputs consolidate the harmless assay of thing：

Dongguan City river engineering silt consolidation soil examining report SZGD20130322-6 tables six

Sequence number	Detection project	Testing result	Unit
				1	PH value	7.72	-
2	Moisture content	27.31	%
				3	Cadmium	＜ 0.008	Mg/L
4	Total chromium	0.01	Mg/L
				5	Mercury	0.0039	Mg/L
6	Cr VI	＜ 0.004	Mg/L
				7	Nickel	0.17	Mg/L
8	Lead	＜ 0.08	Mg/L
				9	Arsenic	0.0099	Mg/L
10	Copper	0.46	Mg/L
				11	Alkyl mercury	Do not detect	Mg/L
12	Zinc	0.02	Mg/L

Dongguan City river engineering silt consolidation soil examining report SZGD20130419-8 tables seven

Sequence number	Detection project	Testing result	Unit
				1	PH value	8.14	-
2	Moisture content	24.8	%
				3	Cadmium	＜ 0.008	Mg/L
4	Total chromium	0.02	Mg/L
				5	Mercury	＜ 0.0002	Mg/L
6	Cr VI	＜ 0.004	Mg/L
				7	Nickel	0.05	Mg/L
8	Lead	＜ 0.08	Mg/L
				9	Arsenic	0.0039	Mg/L
10	Copper	0.15	Mg/L
				11	Alkyl mercury	Do not detect	Mg/L
12	Zinc	0.03	Mg/L

The leaching method and analysis method of mud toxicant by standard GB/T 5085.3 regulation, examining report value show Show and meet national standard GS18598-2001 hazard waste landfill Environmental capacity standards.

9th, economization：Every cubic metre of sludge solidification processing cost unit price is naturally square for 86~96 yuan (1 at this stage for this method In kilometer), compare " Yunnan Province's house and the town and country construction Room, Yunnan Province's development and the reply of the reform committee " Yun Jiancheng [2012] 103.33 yuan/M3 of sludge solidification unit price in No. 212 files, relative cost decreases；Mainly have：1 desilting mud and consolidation process Decrement brings traffic expense to reduce；2 mud take and stack space expenses and reduce；3 nontoxic tail water reusable edibles；4 harmless indexs are more Good, resource regeneration is more extensive；And the raising of environment-friendly quality is the key point to social value contribution.

Claims

1. a kind of desilting mud decrement, the harmless, utilization of resources, mechanical dehydration solidifying integrated treatment method are comprised the steps of：

(1) mud for gushing Hu Ku rivers is rinsed through scene pump pressure, separates mud, sandstone debris, first time decrement more than 10%；

(2) using slush pump through pipeline strange land storage basin, every cubic metre of mud adds 0.005KgFSA silt coagulation agent to do Mud-water separation；

(3) air blast pumping unit gas making catalysis, oxygenation and degradation of contaminant are used from storage basin slurry-sucking to aeration tank；

(4) mud balancing reservoir is entered from the sieving of mud aeration tank discharge open channel and after ultraviolet sterilizer sterilization；

(5) every cube of mud adds 5~20KgHEC high strong water resistants soil solidifying agent to be well mixed；

(6) pumping mud is clamped to outer power squeezer and is dehydrated, and the harmless sheet consolidation thing of output, cool putting 1 day draws moisture content Less than 25.5%, second decrement more than 55%.

2. according to claim 1 desilting mud decrement it is characterized in that Yi Huku, river gush every cubic metre of original state mud after treatment Consolidation thing is less than 0.35 cubic metre, decrement more than 65%.

3. according to claim 1 the harmless, utilization of resources, mechanical dehydration solidifying integrated treatment method it is characterized in that：From storage Mud sump pumping mud, using the micropore aeration pipe of air blast pumping unit connection mud aeration tank installation, connects to aeration tank to mud Continuous uniform aeration catalysis, gas and its oxygen content are fully dissolved in slurries, dilute to mud contamination thing by aeration oxygen replenishing Release and degrade, then flow into sieving machine and ultraviolet sterilization decontamination, Neng Gou are carried out by the ultraviolet sterilizer installed in open channel The each space of mud in open channel through flowing through has ultraviolet light quantity to shoot bacterium sterilization, the harmless consolidation of output after mechanical dehydration to death Soil, can directly make engineering backfill, bank protection and planting soil.