CN204174056U - A kind of mud two-stage anhydration system - Google Patents
A kind of mud two-stage anhydration system Download PDFInfo
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- CN204174056U CN204174056U CN201420497170.0U CN201420497170U CN204174056U CN 204174056 U CN204174056 U CN 204174056U CN 201420497170 U CN201420497170 U CN 201420497170U CN 204174056 U CN204174056 U CN 204174056U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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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
- Y02W10/20—Sludge processing
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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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Treatment Of Sludge (AREA)
Abstract
The utility model provides a kind of mud two-stage anhydration system, comprise pretreater, pretreater import is connected with the sludge pump of conveying mud, pretreater outlet is connected with anaerobic fermentation tank, be communicated with burning machine inlet after the methane outlet connection tank for sewage gas of anaerobic fermentation tank, the exhanst gas outlet of combustion engine is connected with waste heat boiler; The sludge outlet of anaerobic fermentation tank is connected with the mud import of one-level drying machine by water extracter, and the sludge outlet of one-level drying machine is connected with the mud import of secondary drying machine; The crusher being used for sludge crushing is set in one-level drying machine, waste heat boiler is connected for drying machine provides thermal source with one-level drying machine, secondary drying machine by heating tube respectively, reduce the electricity needs of sludge treatment factory to electrical network, not outer row has gas with foreign flavor, energy-saving, safe and environment-friendly; Point two-stage carries out mummification to dewatered sludge, arranges crusher, carries out timely fragmentation to mud group, effectively improve mummification speed in first step drying machine, and mummification speed is fast, saves space.
Description
Technical field
The utility model relates to field of sludge treatment, particularly a kind of mud two-stage anhydration system.
Background technology
(1) disposal status of mud
The fast development of sewage disposal industry, sewage treatment capacity and increasing rapidly for the treatment of capacity cause the output of sewage sludge in world wide to increase sharply.The composition of sewage sludge and chemical property complexity, both organism, plant nutrient ingredient etc. was comprised, also the hazardous and noxious substances such as heavy metal, pathogenic agent and persistent organism are comprised, mud without effectively process very easily causes secondary pollution to underground water, soil etc., and the environmental benefit of sewage treatment facility is significantly reduced.Therefore, the process of sewage sludge should meet the requirement of innoxious, stabilization, minimizing, resource utilization, that is: the pathogenic agent in mud is killed, the hazardous and noxious substances such as the heavy metal in mud and persistent organism are effectively controlled, organic matter, various nutritive element and energy contained in mud, or safety adds in soil, or be recycled utilization by the techniques enable such as anaerobic digestion or burning source.
The main method of sludge treatment comprises: the generating of landfill, compost, form anaerobic fermentation methane, burning etc.
The landfill disposal of mud not only needs to take a large amount of soils, and landfill yard also discharges a large amount of foul gas and methane isothermal chamber gas, if mishandling, also may cause groundwater pollution.Along with the sharp increase of sludge yield, Sludge landfill processing mode is restricted day by day.
The compost treatment of mud is mainly used in land reclamation, afforestation, agricultural etc.But the shale of compost treatment to mud of mud has very strict requirement, otherwise secondary pollution may be produced to underground water and surrounding environment.
The generating of sludge anaerobic fermentation methane processes the part Energy resources that can reclaim in mud, dewatering performance of sludge after anaerobically fermenting improves, and water ratio is low, and minimizing is obvious, applied rapidly in American-European countries, the mud overwhelming majority after anaerobically fermenting process is used for Land_use change.The shunting that the developed countries such as America and Europe achieve industrial sewage and sanitary sewage is administered, and the heavy metal content of municipal sludge is lower, and the mud after anaerobically fermenting reaches A grade standard, can be directly agricultural.But the sewage of most of China sewage work, simultaneously containing sanitary sewage and industrial sewage, still contains the hazardous and noxious substances such as heavy metal and persistent organism in the mud after anaerobically fermenting, the environmental risk that direct agricultural existence is higher.
Sludge incineration process is that wet mud is put into the direct burning disposal of station boiler, or first carries out mummification to wet mud, and the mud after mummification enters incinerator and completes burning disposal.The burning disposal of mud can farthest realize minimizing and stabilization, and almost kill the germ of in mud 100%, innoxious degree is high.But sludge incineration process needs to consume coal-fired grade for high-grade energy, and fuel cost is higher.In addition, wet mud contains large quantity of moisture, and cause the exhaust gas volumn after sludge incineration significantly to increase, the purifying treatment of a large amount of flue gas costly.
(2) sludge drying technique present situation
For the mud that the sewage work of sanitary sewage and industrial sewage mixed flow produces, anhydration and incineration processing method is the prioritizing selection realizing sewage sludge harmlessness, minimizing, resource utilization, sludge incineration Technical comparing is ripe, and sludge drying technique is the core of sludge anhydration burning treatment technology.The working process of sludge drying and technical characterstic are: the wet moisture percentage in sewage sludge after water extracter dehydration is about 80%, burn to realize sludge stabilization, need first to carry out mummification to mud, the water ratio of mud is reduced to below 50% to 30%, concrete water content requirement is relevant with the organic content of mud, if the organic content of mud is high, the moisture percentage in sewage sludge after mummification can be higher, if the organic content of mud is low, the moisture percentage in sewage sludge after mummification requires lower.
At present, sludge drying technique mainly comprises following school.
(1) the burn heat of release of high-grade fuel is utilized to produce steam or the hot water thermal source as sludge drying.Present method technically reliable, application is comparatively extensive, but needs to digest high-grade fuel.Along with the lasting of fuel price is risen, the cost of this drying method is high.
(2) utilize sun power as the thermal source of sludge drying.Although present method fuel saving cost, the floor space of sunlight shed is large.In addition, solar energy desiccation mud flow process can not non-stop run, at night with do not have sunlit daytime, mud can not obtain drying and other treatment, need the storage holdings of Large Copacity mud, and the wet mud stacking process not obtaining mummification discharges a large amount of foul smell, contaminate environment.
(3) belt-type drying.On the belt that mud is laid in, mud moves with belt.This mummification mode of mud utilizes the convective heat exchange between the high-temperature gas of environment and mud to heat mud, but convection transfer rate is little, and equipment volume is large, cost is high.
(4) fluidized-bed mummification.The higher mummification of a large amount of temperature, semi-oriented mud is there is in fluidized-bed, a large amount of fluidized winds is blasted from fluidized-bed bottom, the mud in fluidized-bed is made to be in fluidized state, carry out strong heat transfer, mass transfer process between mud and gas, mud is heated rapidly, moisture rapid evaporation in mud, leave mud and be fluidized rapidly wind and take away.Therefore, the drying and other treatment ability that present method has mud is large, the advantages such as floor space is little.
Mud also exists tacky state region in drying process, that is: the water ratio of mud is in the interval range of about 60% to 40%, the viscosity of mud is very strong, easy generation clustering phenomena, the heat transfer property of mud is deteriorated, moisture is not easy to be evaporated, and the sludge drying speed under this state sharply reduces.In belt-type drying process, mud moves together with conveying belt, and this moving process strengthens the disturbance to mud group, impels mud to roll into a ball and breaks, and the evaporation being conducive to heat trnasfer and moisture is separated out, and is conducive to promoting sludge drying.The process of fluidized-bed dewatered sludge, in order to overcome the clustering phenomena of mud tacky state, Fluidization wind rate must be strengthened, make mud roll into a ball rapid disruption, moisture evaporation, but, large discharge Fluidization wind rate not only causes the serious wear of fluidized-bed internal heating surface, failure rate increases, also cause the current consumption of blower fan to increase, strengthen running cost.
Utility model content
The purpose of this utility model is to overcome prior art defect, provides a kind of failure rate is low, and mummification speed is fast, the mud two-stage anhydration system of energy-conservation, safety and environmental protection.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of mud two-stage anhydration system, comprise the pretreater decomposed for mud organic substance, pretreater import is connected with the sludge pump of conveying mud, pretreater outlet is connected with anaerobic fermentation tank, be communicated with burning machine inlet after the methane outlet connection tank for sewage gas of anaerobic fermentation tank, the exhanst gas outlet of combustion engine is connected with waste heat boiler; The sludge outlet of anaerobic fermentation tank is connected with the mud import of one-level drying machine by water extracter, and the sludge outlet of one-level drying machine is connected with the mud import of secondary drying machine; Be provided with the crusher for sludge crushing in one-level drying machine, waste heat boiler is connected for drying machine provides thermal source with one-level drying machine, secondary drying machine respectively by heating tube.
Described secondary drying machine is fluid-bed drier, and the pneumatic outlet of fluid-bed drier is connected with the gas feed of condenser with induced draft fan by fly-ash separator successively, and the pneumatic outlet of condenser is connected with the gas feed of fluid-bed drier.
The fluidized wind main component flowing through described fluid-bed drier is nitrogen.
Mist eliminator, spray header and water collecting basin is disposed with from top to bottom in described condenser, water collecting basin is communicated with by the spray header of corrosion resistant pump with condenser top, by corrosion resistant pump, the top of the water coolant in water collecting basin from condenser is sprayed, the fluidized wind be delivered in condenser (8) with mummification medium tube (9) directly contacts, and fluidized wind is lowered the temperature.
Described fly-ash separator is sack cleaner.
Described one-level drying machine is mud baking room or belt dryer, is provided with well heater, outside is provided with ventilator in one-level drying machine.
Described water extracter is belt filter press, plate-and-frame filter press or centrifuge.
Described combustion engine is connected with transformer.
The utility model compared with prior art, has the following advantages:
(1) biogas utilizing sludge anaerobic fermentation to produce raw is for fuel engine power generation, the waste heat of combustion engine discharge is by the thermal source of waste heat boiler recovery as dehydrated sludge mummification, reduce the electricity needs of sludge treatment factory to electrical network, also save the demand of sludge drying to high-grade fuel, reduce cost, not outer row has gas with foreign flavor simultaneously, avoids foul gas and methane isothermal chamber gaseous emission on the impact of environment, energy-conservation, safety and environmental protection.
(2) point two-stage carries out mummification to dewatered sludge, in first step drying machine, crusher is set, timely fragmentation is carried out to the mud group produced under being in tacky state, the mummification speed of the rate of heat transfer that effectively improve mud, the moisture vaporator rate that improve mud and mud, then carry out abundant drying through secondary drying machine, mummification speed is fast.
Further, secondary drying machine adopts fluid bed dryer, and mud and fluidizing agent are in great turbulence level state, and the mummification speed of mud increases substantially.In addition, after one-level mummification, the water ratio of mud deviate from tacky state region, and in one-level drying machine, fragmentation has been carried out to mud group, mud conglomeration problem is there is not in secondary drying device, therefore the Fluidization wind rate of fluidized-bed can significantly reduce, and preferably resolves fluidized-bed internal heating surface wear problem, significantly reduces the power consumption of fluidized air blower simultaneously.The operation troubles rate of anhydration system significantly reduces, and maintenance cost is low, and working cost is low.In addition, the drying power of fluid bed dryer is large, floor space is little.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: 1-sludge pump, 2-anaerobic fermentation tank, 3-water extracter, 4-one-level drying machine, 5-crusher, 6-secondary drying machine, 7-corrosion resistant pump, 8-condenser, 9-mummification medium tube, 10-fly-ash separator, 11-well heater, 12-heating tube, 13-ventilator, 14-waste heat boiler, 15-transformer, 16-combustion engine, 17-tank for sewage gas, 18-pretreater, 19-induced draft fan.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
See Fig. 1, the utility model mainly comprises pretreater 18, anaerobic fermentation tank 2, combustion engine 16, waste heat boiler 14, water extracter 3, one-level drying machine 4, secondary drying machine 6, crusher 5, condenser 8 etc.Pretreater 18 import of decomposing for mud organic substance is connected with the sludge pump 1 carrying mud, pretreater 18 outlet is connected with anaerobic fermentation tank 2, after the methane outlet of anaerobic fermentation tank 2 connects tank for sewage gas 17 and combustion engine 16 inlet communication, combustion engine 16 is connected with transformer 15, and the exhanst gas outlet of combustion engine 16 is connected with waste heat boiler 14; The sludge outlet of anaerobic fermentation tank 2 is connected with the mud import of one-level drying machine 4 by water extracter 3, and the sludge outlet of one-level drying machine 4 is connected with the mud import of secondary drying machine 6; One-level drying machine 4 is mud baking room or belt dryer, well heater 11 and the crusher 5 for sludge crushing is provided with in one-level drying machine 4, outer setting has ventilator 13, and waste heat boiler 14 is connected for drying machine provides thermal source with one-level drying machine 4, secondary drying machine 6 respectively by heating tube 12.
Described secondary drying machine 6 is fluid-bed drier, the gas import and export of secondary drying machine 6 is connected by closed mummification medium tube 9, the gas main component of filling in described mummification medium tube 9 is nitrogen, the pneumatic outlet of fluid-bed drier is connected with the gas feed of condenser 8 with induced draft fan 19 is rear by the fly-ash separator 10 be arranged in mummification medium tube 9 successively, the pneumatic outlet of condenser 8 is connected with the gas feed of fluid-bed drier by mummification medium tube 9, and fly-ash separator 10 is sack cleaner; Mist eliminator, spray header and water collecting basin is disposed with from top to bottom in described condenser 8, water collecting basin is communicated with the spray header on condenser top by corrosion resistant pump 7, to be sprayed by the water coolant in water collecting basin the fluidized wind in mummification medium tube 9 is lowered the temperature by corrosion resistant pump 7 from the top of condenser 8.
Further, described water extracter 3 is belt filter press, plate-and-frame filter press or centrifuge, can complete sludge dehydration process fast.
The wet mud that sewage work produces is delivered to pretreater 18 by sludge pump 1 and carries out pre-treatment, and after pre-treatment, the organism in mud carries out and decomposition, effectively can promote the raw more biogas of sludge anaerobic fermentation to produce.Anaerobic fermentation tank 2 is entered through pretreated mud, the residence time was at about 15 to 20 days, organism more than 50% in mud changes into biogas, biogas is delivered to tank for sewage gas 17, finally enter combustion engine 16 to burn, in biogas, the converts chemical energy of about 30% to 45% becomes electric energy to be delivered to transformer 15, the high-temperature flue gas of flue-gas temperature between 350 DEG C to 550 DEG C of combustion engine discharge enters waste heat boiler 14, carry out waste heat recovery, the waste heat reclaimed is delivered to one-level drying machine 4 and secondary drying machine 6, for mummification dewatered sludge by heating tube 12.
After anaerobic fermentation tank 2 ferments, mud enters water extracter 3 and dewaters, the water ratio of mud is reduced to less than 70%, enter into one-level drying machine 4 subsequently, the waste heat that waste heat boiler 14 reclaims introduces the well heater 11 of one-level drying machine 4 for heating mud through heating tube 12, mud temperature raise, moisture evaporation after and form mud group, mud group heat transfer property decline, mud group in moisture vaporator rate sharply reduce.The water vapour that one-level drying machine 4 produces is got rid of by ventilator 13 in time, is beneficial to the further mummification of mud.In order to the heat transfer of accelerate sludge, the evaporation of moisture, the crusher 5 utilizing one-level drying machine 4 to arrange is by broken for mud group, and the mummification of accelerate sludge, the water ratio of final mud is reduced to after below 40%, and mud leaves one-level drying machine 4, enters secondary drying machine 6.
A large amount of semi-oriented mud is full of in secondary drying machine 6, the fume afterheat that waste heat boiler 14 reclaims combustion engine 16 discharge introduces secondary drying machine 6 through heating tube 12, the bottom of the fluidized wind of mud from secondary drying machine 6 passes into by mummification medium tube 9, and make mud be in fluidized state, fluidized wind and mud are in strong turbulence state, heat transfer intensity between mud and heating tube increases considerably, and the moisture rapid evaporation in mud is transformed into water vapor and is fluidized wind to be taken away.Fluidized wind carries after a large amount of water vapor leaves secondary drying machine 6 and enters fly-ash separator 10, dust in the middle of fluidized wind enters condenser 8 after being trapped by fly-ash separator 10, there is a certain amount of water coolant condenser 8 bottom, water coolant sprays from the top of condenser 8 and fluidized wind is lowered the temperature by corrosion resistant pump 7, the fluidized wind carrying water vapor enters into condenser 8 from bottom, fluidized wind directly contacts with the water sprayed lowers the temperature, water recovery Cheng Shuiyu spray water in fluidized wind drops to the bottom of condenser 8 together, discharges through water port.
Mud produces biogas through pre-treatment and anaerobically fermenting, promotes fuel engine power generation, and waste heat recovery, as the thermal source of sludge dryer, utilizes energy generating and the dewatered sludge of mud self, reduces the electricity needs to electrical network, saves high-grade fuel.Enter one-level drying machine after sludge dewatering after fermentation, drying process is with entering into secondary drying machine after shattering process, sludge resource rate is high, energy cascade utilization, and utilization ratio is high; Carry out two-stage mummification to mud, system stability is high, failure rate is low, and mummification performance is strong, it is large to exert oneself, and takes up an area little; Realize innoxious, the stabilization of mud, minimizing, recycling treatment, there is good economy and environment benefit.
Claims (8)
1. a mud two-stage anhydration system, it is characterized in that: comprise the pretreater (18) decomposed for mud organic substance, pretreater (18) import is connected with the sludge pump (1) of conveying mud, pretreater (18) outlet is connected with anaerobic fermentation tank (2), the methane outlet of anaerobic fermentation tank (2) connect tank for sewage gas (17) afterwards with combustion engine (16) inlet communication, the exhanst gas outlet of combustion engine (16) is connected with waste heat boiler (14);
The sludge outlet of anaerobic fermentation tank (2) is connected by the mud import of water extracter (3) with one-level drying machine (4), and the sludge outlet of one-level drying machine (4) is connected with the mud import of secondary drying machine (6); Be provided with the crusher (5) for sludge crushing in one-level drying machine (4), waste heat boiler (14) is connected for drying machine provides thermal source with one-level drying machine (4), secondary drying machine (6) respectively by heating tube (12).
2. mud two-stage anhydration system according to claim 1, it is characterized in that: described secondary drying machine (6) is fluid-bed drier, the pneumatic outlet of fluid-bed drier is connected with the gas feed of induced draft fan (19) with condenser (8) by fly-ash separator (10) successively, and the pneumatic outlet of condenser (8) is connected with the gas feed of fluid-bed drier.
3. mud two-stage anhydration system according to claim 2, is characterized in that: the fluidized wind main component flowing through described fluid-bed drier is nitrogen.
4. mud two-stage anhydration system according to claim 2, it is characterized in that: described condenser is disposed with mist eliminator, spray header and water collecting basin in (8) from top to bottom, water collecting basin is communicated with the spray header on condenser top by corrosion resistant pump (7), by corrosion resistant pump (7), the top of the water coolant in water collecting basin from condenser (8) is sprayed, the fluidized wind be delivered in condenser (8) with mummification medium tube (9) directly contacts, and fluidized wind is lowered the temperature.
5. mud two-stage anhydration system according to claim 2, is characterized in that: described fly-ash separator (10) is sack cleaner.
6. the mud two-stage anhydration system according to any one of claim 1-5, it is characterized in that: described one-level drying machine (4) is mud baking room or belt dryer, in one-level drying machine (4), be provided with well heater (11), outside is provided with ventilator (13).
7. the mud two-stage anhydration system according to any one of claim 1-5, is characterized in that: described water extracter (3) is belt filter press, plate-and-frame filter press or centrifuge.
8. the mud two-stage anhydration system according to any one of claim 1-5, is characterized in that: described combustion engine (16) is connected with transformer (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420497170.0U CN204174056U (en) | 2014-08-29 | 2014-08-29 | A kind of mud two-stage anhydration system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420497170.0U CN204174056U (en) | 2014-08-29 | 2014-08-29 | A kind of mud two-stage anhydration system |
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| CN204174056U true CN204174056U (en) | 2015-02-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150732A (en) * | 2014-08-29 | 2014-11-19 | 凤阳海泰科能源环境管理服务有限公司 | Two-stage sludge drying system |
| CN105396351A (en) * | 2015-12-16 | 2016-03-16 | 张春辉 | Bionic gravity-type high-efficiency environment-friendly sludge drying device, and implementation method thereof |
| CN106517726A (en) * | 2016-12-26 | 2017-03-22 | 南昌航空大学 | Two-stage sludge drying device and method |
| CN109593538A (en) * | 2019-01-02 | 2019-04-09 | 安徽省通源环境节能股份有限公司 | Exhaust treatment system during a kind of sludge carbonization |
-
2014
- 2014-08-29 CN CN201420497170.0U patent/CN204174056U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150732A (en) * | 2014-08-29 | 2014-11-19 | 凤阳海泰科能源环境管理服务有限公司 | Two-stage sludge drying system |
| CN104150732B (en) * | 2014-08-29 | 2016-05-25 | 凤阳海泰科能源环境管理服务有限公司 | A kind of mud two-stage anhydration system |
| CN105396351A (en) * | 2015-12-16 | 2016-03-16 | 张春辉 | Bionic gravity-type high-efficiency environment-friendly sludge drying device, and implementation method thereof |
| CN106517726A (en) * | 2016-12-26 | 2017-03-22 | 南昌航空大学 | Two-stage sludge drying device and method |
| CN109593538A (en) * | 2019-01-02 | 2019-04-09 | 安徽省通源环境节能股份有限公司 | Exhaust treatment system during a kind of sludge carbonization |
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