CN105541073A - Solid-gas double-effect dehydration method for sludge - Google Patents

Solid-gas double-effect dehydration method for sludge Download PDF

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Publication number
CN105541073A
CN105541073A CN201510910326.2A CN201510910326A CN105541073A CN 105541073 A CN105541073 A CN 105541073A CN 201510910326 A CN201510910326 A CN 201510910326A CN 105541073 A CN105541073 A CN 105541073A
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gas
drying
heat
heating
liquid
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CN201510910326.2A
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Chinese (zh)
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伍顺洪
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伍顺洪
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Priority to CN201510910326.2A priority Critical patent/CN105541073A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/06Sludge reduction, e.g. by lysis
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies

Abstract

The invention relates to a solid-gas double-effect dehydration method for sludge. During dehydration, a three-phase exchange and circulation system is employed; exchange among three phases, i.e., a solid phase, a liquid phase and a gas phase during drying of the sludge is accomplished under the condition of a small temperature difference; thus, solid-liquid separation, liquid-gas combination and liquid-gas separation effects on the sludge are realized. The method provided by the invention has high drying efficiency, no exhaust gas emission, low treatment cost, small investment, a small occupied land area and easiness in implementation; energy is saved through cyclic utilization of waste heat; and the method is an environment-friendly sludge dehydration and drying technology which has good market prospects and can be easily promoted and applied.

Description

Mud solid and gas economic benefits and social benefits dehydration treatment method
Technical field
The present invention relates to a kind of processing method of sludge dewatering, feature is a kind of mud solid and gas economic benefits and social benefits dehydration treatment method, and belonging to sludge environment-friendly treatment technology, is the innovation to traditional sludge environmental protection treatment technology.
Background technology
Along with the quickening of Development of China's Urbanization, town sewage amount is increasing, town domestic sewage, industrial sewage can produce a large amount of mud in treating processes, and pollutent contained in the mud that different sewage produces after treatment is also different, according to mud kind, the data such as character and concentration, select corresponding Method and process to process pointedly, but no matter adopt which kind for the treatment of process, sludge dewatering link and effect can have a strong impact on the quality of sludge treatment, efficiency and expense.The mud that sewage disposal produces carries out predrainage through pressure filter usually, and after predrainage, moisture percentage in sewage sludge is about 75% ~ 80%, then transfers to the unit possessing professional qualification to carry out dirty process of going out.Current mud dewatering method is generally divided into direct high-temperature oven drying method and chemistry to add, high-temperature oven drying method two kinds again after mechanism filter-pressing.The advantage of direct oven drying method drops into province, occupation of land less, and shortcoming is serious power consumption, and costly, produce a large amount of waste gas and particle conglomeration blocking, the unbalanced causing trouble of equipment operating load is many for processing cost; Chemistry adds, the advantage of high-temperature oven drying method is segmentation dehydration again after mechanism filter-pressing, energy-conservation, processing cost is low, shortcoming be investment large, take up an area large, produce large quantity of exhaust gas and particle conglomeration blocking, equipment operating load unbalanced causing trouble rate is high.Therefore, all there is major defect and deficiency in above-mentioned two kinds of dewaterings.
Summary of the invention
For above-mentioned drying sludge dehydration Problems existing, the invention provides a kind of mud solid and gas economic benefits and social benefits dehydration treatment method, thus reach drying sludge processed, non-exhaust emission, heat energy reuses, and little temperature difference solid-liquid three-phase exchanges, sludge treatment efficiency is high, equipment running load is comparatively even, reduces processing cost, takes up an area object that is few and reduced investment.
The technical solution used in the present invention:
A kind of mud solid and gas economic benefits and social benefits dehydration treatment method, comprise heating system, drying system, predrainage treatment system, wherein heating system is connected with drying system, and drying system is connected with predrainage treatment system, characterized by further comprising the following recycle system:
A, three-phase exchange cycles system, it comprises drying system and gas dewatering air drying system, drying system is connected to heating system and gas dewatering air drying system, the heat that heating system derives is passed to drying system, the heat that drying system derives passes to gas dewatering air drying system, and the heat that gas dewatering air drying system is derived passes to heating system;
Described three-phase exchange cycles system, comprise solid-liquid separation, the depressed conjunction of liquid and liquid gas exchange three processes, solid sludges enters the drying system of three-phase exchange cycles system after predrainage process, the hot run test circulation of being come in by heating system in drying system directly contacts with mud, carry out gas-liquid exchange, liquid releases from solid sludges to be taken away by hot run test gas, now hot run test and liquid phase mixing are in saturated gaseous state, the hot blast of state of saturation, from the dryer of drying system, enter gas dewatering air drying system, carry out energy recovery; Saturated hot blast gas is lowered the temperature and dehydrated process simultaneously, make it to become dry-air blast, dry-air blast is transmitted back to thermal source district by heat transfer pipe, hot run test is become through heating system heats, deliver to drying system for three-phase exchange cycles by recirculation blower again, complete a hot air circulation like this, go round and begin again, thus reach mud solid-liquid separation, the effect that the depressed conjunction of liquid is separated with liquid gas.
B, recycling residual heat system
A, the first recycling residual heat system, it is connected between gas dewatering air drying system and heating system, and the hot blast that the heat of being derived by gas dewatering air drying system passes to heating system by the first heat transfer pipe exchanges interchanger.
B, the second recycling residual heat system, it is connected between gas dewatering air drying system and predrainage treatment system, and the heat of being derived by gas dewatering air drying system passes to the predrainage machine of predrainage treatment system by the second heat transfer pipe.
Described heating system comprises heat conducting furnace and hot blast exchanges interchanger, and heat conducting furnace exchanges interchanger by oil guide pipe and hot blast and is connected, and the heat of heat conducting furnace is exchanged interchanger by hot blast and passes to drying system.
Described gas dewatering air drying system comprises heat reclamation device and gas dewatering device, and heat reclamation device is connected with gas dewatering device with dryer respectively by pipeline, and gas dewatering device is connected with the interchanger of heating system by the first heat transfer pipe.
Described dryer is rotary drying machine, and process furnace is constant temperature heat conducting furnace, and interchanger is that hot blast exchanges interchanger.
Dry-air blast temperature≤85 DEG C in described three-phase exchange cycles system, humidity≤10%; Hot run test temperature >=125 DEG C, humidity≤10%.
Beneficial effect of the present invention:
Compared with sludge dewatering drying method in the past, the present invention adopts mud solid and gas economic benefits and social benefits processed technology, complete liquid gas three-phase in drying sludge process by the little temperature difference to exchange, sludge dewatering treatment efficiency is high, and processing costs economizes, and takes up an area few, easy to implement, can reach drying sludge dehydration non-exhaust emission, heat energy reuses, and energy conservation and consumption reduction effects is remarkable.
Accompanying drawing explanation
Fig. 1 is sludge dewatering treatment system schematic diagram of the present invention;
Fig. 2 is sludge dewatering three-phase exchange cycles process graphical of the present invention.
Embodiment:
With reference to accompanying drawing, the present invention is specifically described.
In fig. 1 and 2, the present invention includes heating system, drying system, predrainage treatment system, wherein heating system is connected with drying system, drying system is connected with predrainage treatment system, described three-phase exchange cycles system, comprise drying system and gas dewatering air drying system, drying system is connected to heating system and gas dewatering air drying system, the heat that heating system derives is passed to drying system, the heat that drying system derives passes to gas dewatering phoenix dry systems, and the heat that gas dewatering air drying system is derived passes to heating system;
Described three-phase exchange cycles system, comprise solid-liquid separation, the depressed conjunction of liquid and liquid gas exchange three processes, mud enters the drying system of three-phase exchange cycles system after predrainage process, the hot run test circulation of being come in by heating system in drying system directly contacts with mud, carry out gas-liquid exchange, liquid releases from solid sludges to be taken away by hot run test gas, now hot run test and liquid phase mixing are in saturated gaseous state, the hot blast of state of saturation, from the dryer of drying system, enter gas dewatering air drying system carry out energy recovery, saturated hot blast gas is lowered the temperature and dehydrated process simultaneously, make it to become dry-air blast, dry-air blast is transmitted back to thermal source district by heat transfer pipe, hot run test is become through heating system heats, drying system is delivered to for three-phase exchange cycles again by recirculation blower, complete a hot air circulation like this, go round and begin again, thus reach mud solid-liquid separation, the effect that the depressed conjunction of liquid is separated with liquid gas.
Further illustrate sludge dewatering treatment process (see Fig. 1) of the present invention below: mud enters drying system after the predrainage of the predrainage machine of mud predrainage treatment system, processed is carried out in the dryer of drying system, comprising the solid-liquid separation of mud, liquid gas cohesive process, the saturated hot blast that the depressed conjunction of liquid afterwards produces enters gas dewatering air drying system and carries out the separation of liquid gas, gas dewatering is carried out air-dry and carry out heat energy recycle in heat reclamation device in the gas dewatering device of this system, deliver to hot blast by blower fan through the first heat transfer pipe through the hot dry wind that the temperature of dehydration is lower to exchange interchanger and carry out thermal energy exchange from the comparatively high temps heat energy that heat conducting furnace is come in, pass through thermal energy exchange, temperature raises into hot run test, and be sent to the drier mud of drying system.
From the heat that heat reclamation device reclaims, delivered to the predrainage machine of mud predrainage treatment system by the second heat transfer pipe, predrainage process is carried out to mud, carry out heat recovery, save energy; Utilize the emission-control equipment be connected with gas dewatering air drying system and chilled water unit to carry out off gas treatment and the air-dry process of cooled dehydrated, to reach the environmental requirement of non-exhaust emission to gas simultaneously.
In three-phase exchange cycles system, dry-air blast temperature≤85 DEG C, humidity≤10%; Hot run test temperature >=125 DEG C, humidity≤10%.

Claims (5)

1. a mud solid and gas economic benefits and social benefits dehydration treatment method, comprise heating system, drying system, predrainage treatment system, wherein heating system is connected with drying system, and drying system is connected with predrainage treatment system, characterized by further comprising the following recycle system:
A, three-phase exchange cycles system, it comprises drying system and gas dewatering air drying system, drying system is connected to heating system and gas dewatering air drying system, the heat that heating system derives is passed to drying system, the heat that drying system derives passes to gas dewatering air drying system, and the heat that gas dewatering air drying system is derived passes to heating system;
Described three-phase exchange cycles system, comprise solid-liquid separation, the depressed conjunction of liquid and liquid gas and exchange three processes, solid sludges enters the drying system of three-phase exchange cycles system after predrainage process, the hot run test circulation of being come in by heating system in drying system directly contacts with mud, carry out gas-liquid exchange, liquid releases from solid sludges to be taken away by hot run test gas, now hot run test and liquid phase mixing are in saturated gaseous state, the hot blast of state of saturation, from the dryer of drying system, enter gas dewatering air drying system, carry out energy recovery; Saturated hot blast gas is lowered the temperature and dehydrated process simultaneously, make it to become dry-air blast, dry-air blast is transmitted back to thermal source district by heat transfer pipe, hot run test is become through heating system heats, deliver to drying system for three-phase exchange cycles by recirculation blower again, complete a hot air circulation like this, go round and begin again, thus reach mud solid-liquid separation, the effect that the depressed conjunction of liquid is separated with liquid gas;
B, recycling residual heat system
A, the first recycling residual heat system, it is connected between gas dewatering air drying system and heating system, and the heat of being derived by gas dewatering air drying system passes to the interchanger of heating system by the first heat transfer pipe;
B, the second recycling residual heat system, it is connected between gas dewatering air drying system and predrainage treatment system, and the heat of being derived by gas dewatering air drying system passes to the predrainage machine of predrainage treatment system by the second heat transfer pipe.
2. a kind of mud solid and gas economic benefits and social benefits dehydration treatment method according to claim 1, it is characterized in that: described heating system comprises heat conducting furnace and interchanger, heat conducting furnace is connected with interchanger by oil guide pipe, and the heat of heat conducting furnace is passed to drying system by interchanger.
3. a kind of mud solid and gas economic benefits and social benefits dehydration treatment method according to claim 1, it is characterized in that: described gas dewatering air drying system comprises heat reclamation device and gas dewatering device, heat reclamation device is connected with gas dewatering device with dryer respectively by pipeline, and gas dewatering device is connected with the interchanger of heating system by the first heat transfer pipe.
4. a kind of mud solid and gas economic benefits and social benefits dehydration treatment method according to claim 1, it is characterized in that: described dryer is rotary drying machine, process furnace is constant temperature heat conducting furnace, and interchanger is that hot blast exchanges interchanger.
5. a kind of mud solid and gas economic benefits and social benefits dehydration treatment method according to claim 1, is characterized in that: dry-air blast temperature≤85 DEG C in described three-phase exchange cycles system, humidity≤10%; Hot run test temperature >=125 DEG C, humidity≤10%.
CN201510910326.2A 2015-12-10 2015-12-10 Solid-gas double-effect dehydration method for sludge Withdrawn CN105541073A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106196992A (en) * 2016-08-22 2016-12-07 北京神雾环境能源科技集团股份有限公司 The water vapour that refuse pyrolysis produces is used for the system and method for garbage drying after heating up
CN108862995A (en) * 2018-07-09 2018-11-23 广州市浩逸环保科技有限公司 A kind of sludge drying thermostat

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101774743A (en) * 2010-01-26 2010-07-14 沈阳航空工业学院 Latent heat recoverable multi-phase change sludge drying method and device
CN104150735A (en) * 2014-07-25 2014-11-19 中国环境科学研究院 Combined device capable of self-purifying discs and strengthening sludge dewatering by utilizing latent heat and sludge drying method
CN104876416A (en) * 2015-05-14 2015-09-02 何伟才 Sludge drying treatment system and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101774743A (en) * 2010-01-26 2010-07-14 沈阳航空工业学院 Latent heat recoverable multi-phase change sludge drying method and device
CN104150735A (en) * 2014-07-25 2014-11-19 中国环境科学研究院 Combined device capable of self-purifying discs and strengthening sludge dewatering by utilizing latent heat and sludge drying method
CN104876416A (en) * 2015-05-14 2015-09-02 何伟才 Sludge drying treatment system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106196992A (en) * 2016-08-22 2016-12-07 北京神雾环境能源科技集团股份有限公司 The water vapour that refuse pyrolysis produces is used for the system and method for garbage drying after heating up
CN108862995A (en) * 2018-07-09 2018-11-23 广州市浩逸环保科技有限公司 A kind of sludge drying thermostat
CN108862995B (en) * 2018-07-09 2021-10-12 广州市浩逸环保科技有限公司 Sludge drying constant temperature device

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Application publication date: 20160504