CN206051812U - A kind of mercury-containing sludge annealing device - Google Patents
A kind of mercury-containing sludge annealing device Download PDFInfo
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- CN206051812U CN206051812U CN201620799508.7U CN201620799508U CN206051812U CN 206051812 U CN206051812 U CN 206051812U CN 201620799508 U CN201620799508 U CN 201620799508U CN 206051812 U CN206051812 U CN 206051812U
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- sludge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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Abstract
The utility model discloses a kind of mercury-containing sludge annealing device, it is characterized in that including sludge quality-adjusting device, dewaterer, pyrolysis unit, cleaner unit, spray condensing units and exhaust gas processing device, wherein pyrolysis unit includes dryer section, pyrolysis section and the burning zone of sludge.Mercury-containing sludge carries out pretreatment first, pretreated sludge is sent into into pyrolysis unit, the pyrolysis gas that sludge is formed after pyrolysis and combustion are recycled into dryer section utilization, mercury and mercuric compounds in sludge are changed into mercury vapour, dedusting, condensing unit recovering liquid hydrargyrum are subsequently passed, the mercury content in tail gas is less than 0.012mg/m3.In pyrolysis residue leachate, hydrargyrum concentration is less than 0.1mg/L, must not detect alkyl mercury.This utility model patent carries out harmless treatment using pyrolytic technique to sludge, and recycling heat energy reduces Treatment of Sludge energy consumption, prevents mercury pollution, and output has the side-product of certain values, both has an economic benefit, have social value again.
Description
Technical field
This utility model belongs to oil gas field field of energy source environment protection, more particularly to a kind of heat treatment method of mercury-containing sludge.
Background technology
In recent years, with China's natural gas industrial expansion, the substantial amounts of mercury-containing sludge of the annual output in domestic mercurous gas field, and
Indispensable important process link in oil gas field processing system during the process of mercurous oily sludge.If oil gas field mercury-containing sludge is not
Process in time and will cause serious secondary pollution, hydrargyrum is a kind of poisonous heavy metal, by GBZ230-2010《Occupational Exposure poison
Thing Harm level classification》I levels (extremely endangering) poisonous substance is defined as, and hydrargyrum and its multiple compounds have high toxicity, can be to people
Body brain and nervous system produce a series of serious health effects, reproductive performance, organ to the mankind etc. and cause serious harm.
The method for sludge treatment such as traditional landfill, sludge composting or sludge incineration cannot meet the process of mercury-containing sludge, newly developed
Biological treatment it is again immature.The hydrargyrum of different shape in mercury-containing sludge can be carried out using the method and apparatus of the patent comprehensive
Close and reclaim, therefore according to the national policy of " innoxious, resource, energy-saving, environmentally friendly ", the pyrolysis processing technique of mercury-containing sludge
Have become a kind of process trend of sludge.
Utility model content
This utility model has carried out mercury-containing sludge treatment research, there is provided one for the problem of above-mentioned sludge treatment technique
The annealing device of mercury-containing sludge is planted, technique has feasibility and economy, sufficient innoxious, decrement is carried out to mercury-containing sludge
Change, recycling, reduce harm and impact of the hydrargyrum on personnel and environment, reduce Treatment of Sludge energy consumption, and output is valuable
Side-product.
In order to solve above-mentioned technical problem, this utility model is adopted the following technical scheme that：
A kind of annealing device of mercury-containing sludge, including the sludge quality-adjusting device with heating function, dewaterer, helical feed
Machine, pyrolysis unit, cleaner unit, spray condensing units, coalescer and exhaust gas processing device, wherein pyrolysis unit include the dry of sludge
Dry section, pyrolysis section and burning zone, exhaust gas processing device use sulfur loading active carbon.
As further improving, flocculant and dispersant are added when sludge is quenched, part greasy dirt in sludge is removed, improve dirty
The follow-up dewatering of mud.
Described dewaterer is using the Stacked sludge dewatering machine that dehydrating effect is good, economy is strong.
Described pyrolysis oven adopts multi-stage oven, multi-stage oven pyrolysis to have low energy consumption, control oxygen simple to operate, high efficiency, low fortune
The features such as row cost and little floor space.
Filter drum type precipitator of the described dry collector using dedusting high precision.
Described spray condenser system cools down pyrolysis smoke using direct spray mode, reclaims liquid mercury therein.
Described exhaust gas processing device adopts filler for the demercuration tower of sulfur loading active carbon.
Hydrargyrum in described sedimentation pot bottom need to enter back into hydrargyrum collecting box after cyclone separator removing excessive moisture.
A kind of pyrolyzing sludge method, mercury-containing sludge enter sludge quality-adjusting device by apparatus for feeding, by adding hot water, dispersion
Agent and demulsifier, are completely separated silt and oil in sludge；Quality-adjusting device top oil slick is received in the presence of floating oil collecting device
Collect in oil storage tank, carry out mud-water separation into dewaterer from quenched pot bottom sludge out, add in dewaterer upstream
The abundant flocculant of dissolving, the moisture percentage in sewage sludge Jing after dehydration are less than 80%, are dehydrated sludge pumping that motor spindle discharges to follow-up
Annealing device.The sewage that dewaterer is isolated enters Water Tank.
Pretreated mercury-containing sludge delivers to sludge storage bin by the conveying worm for sealing, and subsequently enters pyrolysis installation,
The sludge of moisture content about 80% is delivered to into drying system first, the moisture in sludge is further removed, after mummification moisture content is about
Sludge for 30% carries out pyrolysis processing into pyrolysis oven.Sludge is first pyrolyzed in pyrolysis oven, 400～650 DEG C of pyrolysis temperature, heat
Solution stove vacuum is about 85kPa, and this stage will be the mercury and mercuric compounds in sludge, partial organic substances converting into gas phase；The
Two-stage is combustion phases：The gas phase and carbon solid phase that produce after pyrolysis are again introduced into the combustor of pyrolysis oven, and chamber temperature is about
850～1000 DEG C, the lime-ash for producing that burns is discharged by pyrolysis installation bottom, and combustion product gases are carried out into dryer section to dewatered sludge
It is dried.Appropriate fuel gas can be passed through during reaction in pyrolysis oven, stable pyrolysis temperature.
The mercury fume produced in pyrolysis installation subsequently enters cleaner unit, and the flue gas after dedusting is dropped into spray cooling device
Temperature, by dedusting flue gas cool-down to 40 DEG C or so, mercury vapour and water vapour enter settling tank, settling tank bottom after being condensed into liquid
Hydrargyrum after cyclone enter hydrargyrum collecting tank.Settling tank top sewage enters cooling circulating water system.The tail that condenser is discharged
Gas is subsequently entered, finally by the tail gas after cleaning
Air is entered, is better than《Discharge standard of air pollutants》(GB 16297-1996).
The beneficial effects of the utility model：
This utility model has obvious beneficial effect, knowable to technical scheme compared with existing mercurous waste treatment technique：
Preprocessing process is carried out to which by before mercury-containing sludge carries out pyrolysis processing, selecting suitable chemical reagent and dewaterer,
Water content is made to reduce being easy to subsequent treatment, energy efficient；Then high temperature pyrolysis are adopted, contained mercury and mercuric compounds in sludge are made
It is changed into mercury vapour, uses as drying sludge after mercurous high-temperature flue gas burning, subsequently mercury fume is removed using filter cartridge dust remover
Dirt, it is to avoid the subsequent condensation stage generates mercurous float；Using the hydrargyrum in air cooling and spray two-stage cooling recovered flue gas, finally give up
Gas is passed through the demercuration tower that filler is sulfur loading active carbon.A kind of mercury-containing sludge heat treatment method that this utility model is provided, using heat
Solution technology, process is simple rationally, have carried out sufficient innoxious, recycling, by different shape and the hydrargyrum of valence state to sludge
Effective recycling, high-temperature flue gas are used for drying sludge use, recycling heat energy, reducing energy consumption, such mercury-containing sludge with
The problem of environmental pollution that meaning is stacked is controlled effectively, and both had an economic benefit, and had social benefit again.
Description of the drawings
With reference to the accompanying drawings and detailed description this utility model is described in further detail.
The structural representation of the device that Fig. 1 is provided for this utility model.
In figure：1- chemicals dosing plants, 2- sludge quality-adjusting devices, 3- slush pumps, 4- dewaterers, 5- conveying worms, 6- sludge material
Storehouse, 7- pyrolysis installations, 8- dry collectors, 9- spray condensing units, 10- coalescers, 11- exhaust gas processing devices, 12- sedimentations
Tank, 13- cyclones, 14- hydrargyrum collecting tanks, 15- circulating pumps, 16- Water Tanks, 17- turn water pump, 18- oil storage tanks, 19- oil transfer pumps,
20- cooling circulating water systems.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only this utility model a part of embodiment, rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The all other embodiment for being obtained, belongs to the scope of this utility model protection.
It is a kind of embodiment of the present utility model as shown in Figure 1, the mercury-containing sludge treatment scale in the present embodiment is
1m3/ d (oil-containing, water and hydrargyrum), sludge total mercury content：＞ 200mg/kg；Sludge oil content：≤ 10% (thing entered before dewaterer
Material), moisture percentage in sewage sludge：>=90%.
In the waste residue leachate produced after mercury-containing sludge pyrolysis, hydrargyrum concentration should be less than 0.1mg/L, must not detect alkyl mercury.If
Waste residue is used as agricultural sludge, then in waste residue, mercury and mercuric compounds highest permissible level is 5mg/kg, and waste residue is alternatively arranged as building
Build material or charcoal is used.In the tail gas of claimed apparatus discharge, mercury content is less than 0.012mg/m3。
Heat-treatment protocol includes pretreatment, three processes of heat treatment and vent gas treatment.Mercurous dirt of the moisture content more than 90%
Mud enters sludge quality-adjusting device 2, by adding hot water, dispersant and demulsifier, is completely separated silt and oil in sludge, and oil contains
Water rate is less than 10%, and silt oil content is less than 2%；2 top oil slick of quality-adjusting device collects storage in the presence of floating oil collecting device
The sump oil separated is transported to oil storage tank 18 by oil transfer pump 19 by oil tank 18；Enter de- from 2 bottom of quality-adjusting device sludge out
Water dispenser 4 carries out mud-water separation, has added the fully flocculant of dissolving in 4 upstream of dewaterer, and the moisture percentage in sewage sludge Jing after dehydration is low
In 80%, the sludge pumping of motor spindle discharge is dehydrated to subsequent heat treatment device.The sewage that dewaterer 4 is isolated enters Water Tank
16, gas field water pot or mercurous sewage-treatment plant water inlet surge tank are transported to by turning water pump 17.
Pretreated mercury-containing sludge delivers to sludge storage bin 6 by the conveying worm 5 of sealing, subsequently enters pyrolysis installation
7,7 points of pyrolysis installation is three phases：Dryer section, hot stage and burning zone.First the sludge of moisture content about 80% is delivered to
Dryer section, further removes the moisture in sludge, and after mummification, the sludge of moisture content about 30% is carried out at pyrolysis into pyrolysis section
Reason.Sludge is first pyrolyzed in pyrolysis section, 400～650 DEG C of pyrolysis temperature, and pyrolysis oven vacuum is 85kPa, and pyrolysis time is about
Mercury and mercuric compounds, organic matter pyrolysis in sludge are changed into gas phase by 40min, this stage；Second stage is combustion phases：Pyrolysis
The gas phase and carbon solid phase for producing afterwards is again introduced into the harmful substance that the combustor of pyrolysis oven is fully flared off remnants, burning
About 850～1000 DEG C of Duan Wendu, the lime-ash for producing that burns are discharged by pyrolysis installation bottom, and combustion product gases enter dryer section to dehydration
Sludge is dried.Appropriate fuel gas can be passed through during reaction in pyrolysis oven, stable pyrolysis temperature.
The mercury fume produced in pyrolysis installation subsequently enters dry collector 8, and dust removal efficiency reaches 99.5%, after dedusting
Flue gas is lowered the temperature into spray cooling device 9, and by dedusting flue gas cool-down to 40 DEG C or so, mercury vapour and water vapour are condensed into liquid
Settling tank 12 is entered afterwards, and the hydrargyrum of 12 bottom of settling tank enters hydrargyrum collecting tank 14 after cyclone 13.12 top sewage of settling tank
Into cooling circulating water system 20.
The tail gas that spray condensing units 9 are discharged subsequently sequentially enters coalescer 10 and exhaust gas cleaner 11, can remove and truncate
Tail gas after cleaning is finally entered air by the harmful substance such as hydrargyrum, dioxin, stink in gas.
Chemical reagent employed in pretreatment is poly-ferric chloride, polyacrylamide and dispersant, and poly-ferric chloride adds
Dosage is 2000～2500mg/L, and polyacrylamide adds dosage for 30ppm～200mg/L, the dispersant for adopting for it is efficiently positive from
What sub- surfactant, strong osmotic agent etc. met, plus dosage be 100～200mg/L.Need addition a certain amount of in pyrolysis oven
Catalyst accelerating the cracking reaction of sludge and reduce reaction temperature, the catalyst type that can be added has Fecl3, Na2CO3With
Metal-oxide etc..
Mercury-containing sludge processing meanss Technology of Key Equipments parameter and basic type selecting are as shown in table 1.
1 key equipment main element of table and parameter
The multi-stage oven that this utility model is adopted is made up of several or even more than ten horizontal direction parallel superposition circular siege,
Sludge is entered from body of heater top stove layer.Rake arms with rake teeth promotes solid material in each layer of siege, is pressed by export-oriented center
Material (referred to as " interior rake siege ") is promoted according to spirality path, next siege is fallen in center.In next layer of adjacent siege
Material is pushed to furnace wall (referred to as " outward harrow siege ") by the outside path in center according to spirality path by middle rake arms, by nearly stove
A series of material-dropping holes that wall is arranged fall into next layer of siege.Solid material by this way constantly to the moved beneath of multi-stage oven,
It is final to discharge from bottom siege.Flowed down in the way of reverse flow with the gas material that hot combustion product form occurs
Each upper furnace, flows out from top layer burner hearth.
Relative to pyrolysis plants such as traditional rotary kilns, multi-stage oven need not add auxiliary fuel with autothermal equilibrium is reached,
Energy consumption is low, power demand is low, flying dust amount is few and in-furnace temperature can easily hierarchical control the features such as, foreign countries by multi-stage oven success
It is applied to pyrolyzing sludge.
Claims (7)
1. a kind of mercury-containing sludge annealing device, it is characterised in that include the sludge quality-adjusting device with heating function, dewaterer, spiral shell
Rotation conveyer, pyrolysis unit, dry collector, spray condensing units, coalescer and exhaust gas processing device；The sludge quality-adjusting device
It is connected with the dewaterer, the dewaterer is connected with the front end of the pyrolysis unit by the conveying worm, wherein, institute
Stating pyrolysis unit includes dryer section, pyrolysis section and the burning zone of sludge；The dry collector side and the pyrolysis unit
Afterbody top be connected, opposite side with it is described spray condensing units be connected, it is described spray condensing units top and the coalescer
Connection, the top of the coalescer is connected with exhaust gas processing device.
2. a kind of mercury-containing sludge annealing device according to claim 1, it is characterised in that：The sludge quality-adjusting device is used for
Mercury-containing sludge of the moisture content more than 90% is processed, the sludge quality-adjusting device is by adding flocculant, dispersion in sludge
Agent, major part oil contained in discharge sludge make suspension sludge form great quantity of floc and are easy to subsequently dehydration；The sludge is quenched
Oil drain out is provided with device for oil is entered oil storage tank, one end of the oil storage tank is connected with oil transfer pump, for oil pump is sent
Focused on to oil truck.
3. a kind of mercury-containing sludge annealing device according to claim 1, it is characterised in that：The dewaterer is used to exchange
Sludge after matter is dehydrated, and makes the moisture percentage in sewage sludge Jing after dehydration be less than 80%.
4. a kind of mercury-containing sludge annealing device according to claim 1, it is characterised in that：The pyrolyzing sludge unit is adopted
Drying sludge is carried out with low temperature, makes dried moisture percentage in sewage sludge be about 30%, the pyrolysis section, pyrolysis temperature 400～650
DEG C, to dried pyrolyzing sludge time about 40min, the mercury and mercuric compounds in sludge is evaporated with mercury vapour form, hydro carbons
Small molecule hydrocarbon is converted into by macromole.
5. a kind of mercury-containing sludge annealing device according to claim 1, it is characterised in that：The burning zone temperature 850
DEG C, for burning to pyrolysis gas phase and carbon solid phase after pyrolysis, produce combustion product gases and simultaneously pyrolysis section is entered by combustion product gases
Row heating, and combustion product gases is dried into dryer section to dewatered sludge.
6. a kind of mercury-containing sludge annealing device according to claim 1, it is characterised in that：The dry collector is used for
Mercury fume to producing in pyrolysis unit carries out dedusting, and dust removal efficiency reaches 99.5%, and the spray condenser is for by dedusting
Flue gas cool-down is to 40 DEG C or so.
7. a kind of mercury-containing sludge annealing device according to claim 1, it is characterised in that：Exhaust gas cleaner is using load
Sulfur activated carbon mercury absorbent, for removing hydrargyrum in tail gas, dioxin and stink.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620799508.7U CN206051812U (en) | 2016-07-27 | 2016-07-27 | A kind of mercury-containing sludge annealing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620799508.7U CN206051812U (en) | 2016-07-27 | 2016-07-27 | A kind of mercury-containing sludge annealing device |
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| CN206051812U true CN206051812U (en) | 2017-03-29 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108043864A (en) * | 2017-12-12 | 2018-05-18 | 中国恩菲工程技术有限公司 | The removing system of flying dust Zhong bioxin and mercury metal |
| CN108640458A (en) * | 2018-06-07 | 2018-10-12 | 广西博世科环保科技股份有限公司 | Greasy filth innoxious thermal desorption processing system and processing method |
| CN108954343A (en) * | 2018-07-04 | 2018-12-07 | 福建省东南电化股份有限公司 | A kind of Disposal System of Mud Burning |
| CN109967501A (en) * | 2019-04-30 | 2019-07-05 | 湖南西林环保材料有限公司 | A kind of mercurous body refuse volatilization demercuration equipment of rotary type heating |
| CN116535073A (en) * | 2023-03-17 | 2023-08-04 | 上海市政工程设计研究总院（集团）有限公司 | Sludge-water-gas cooperative treatment method for sewage plant |
-
2016
- 2016-07-27 CN CN201620799508.7U patent/CN206051812U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108043864A (en) * | 2017-12-12 | 2018-05-18 | 中国恩菲工程技术有限公司 | The removing system of flying dust Zhong bioxin and mercury metal |
| CN108640458A (en) * | 2018-06-07 | 2018-10-12 | 广西博世科环保科技股份有限公司 | Greasy filth innoxious thermal desorption processing system and processing method |
| CN108954343A (en) * | 2018-07-04 | 2018-12-07 | 福建省东南电化股份有限公司 | A kind of Disposal System of Mud Burning |
| CN108954343B (en) * | 2018-07-04 | 2019-12-06 | 福建省东南电化股份有限公司 | Sludge incineration treatment system |
| CN109967501A (en) * | 2019-04-30 | 2019-07-05 | 湖南西林环保材料有限公司 | A kind of mercurous body refuse volatilization demercuration equipment of rotary type heating |
| CN116535073A (en) * | 2023-03-17 | 2023-08-04 | 上海市政工程设计研究总院（集团）有限公司 | Sludge-water-gas cooperative treatment method for sewage plant |
| CN116535073B (en) * | 2023-03-17 | 2024-04-19 | 上海市政工程设计研究总院（集团）有限公司 | Sludge-water-gas cooperative treatment method for sewage plant |
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