CN101671104B - Vacuum boiling sludge dewatering and drying method and system - Google Patents
Vacuum boiling sludge dewatering and drying method and system Download PDFInfo
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- CN101671104B CN101671104B CN2008101984820A CN200810198482A CN101671104B CN 101671104 B CN101671104 B CN 101671104B CN 2008101984820 A CN2008101984820 A CN 2008101984820A CN 200810198482 A CN200810198482 A CN 200810198482A CN 101671104 B CN101671104 B CN 101671104B
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Abstract
The invention discloses a vacuum boiling sludge dewatering and drying system, which consists of a boiling tank, a condensing tank, a vacuum pump, a heat pump and corresponding pipe valves which are combined as required. A method comprises the following steps: firstly, filling the sludge to be treated into the boiling tank, sealing, evacuating, and making the absolute pressure of the boiling tank equal to saturated steam pressure at a temperature in the boiling tank; and connecting the boiling tank with the condensing tank which is sealed and evacuated in advance, keeping the temperature in the boiling tank higher than the temperature in the condensing tank to make the saturated steam pressure in the boiling tank higher than that in the condensing tank, and further automatically dispersing the steam formed by continuously boiling water contained in the sludge in the boiling tank into the condensing tank and liquefying the steam so as to dewater and dry the sludge in the boiling tank. Simultaneously, the vacuum pump used is provided with an odor absorbing device inside to absorb the odor discharged from the sludge, and the vacuum pipe inactivates ova and microorganisms through long-time high vacuum.
Description
Affiliated technical field
The present invention relates to a kind of solid and liquid be carried out the isolating method and system of two-phase, relate in particular to a kind of method and system of mud being carried out dehydration and drying.Belong to sewage disposal and field of solid waste treating technology, be applicable to and handle the needs that the different scales organic sludge is handled.
Technical background
Sewage work will produce a large amount of mud in operational process, be characterized in that volume is big, water ratio is high, be that its volume is reduced to the sludge treatment top priority, reduce the water ratio in the mud, and mud is carried out dehydration and drying.The kind of traditional sludge dewatering is a lot, can be divided into vacuum filtering and dewatering, filter-press dehydration, centrifuge dehydration and oven dry etc. by dewatering Principle.Vacuum filtering and dewatering system places mud on the porousness filtration medium, causes vacuum at the medium opposite side, with the moisture in the mud " suctions " by force, makes it to separate with mud, thereby realizes dewatering.Filter-press dehydration system places mud on the filtration medium, in mud one side mud is exerted pressure, and makes moisture pass through medium by force, makes it to separate with mud, thereby realizes dehydration.Thereby centrifuge dehydration system realizes dehydration by being separated from each other of official post of the centrifugal force of moisture and mud granule.Oven dry is mud directly or indirectly to be heated make the water evaporates in the mud realize dehydration and drying.
There is the water secondary pollution that detaches in dehydration equipments such as vacuum filtering and dewatering, filter-press dehydration, centrifuge dehydration, need to handle again, the phosphorus nitrogen height that particularly contains in the sewage, increase the weight of the sewage disposal burden, in the dehydration, foul smell in the mud overflows easily, and operating environment is worsened, and handles in the mud of back effectively shortcoming such as deactivation of worm's ovum and microorganism.And oven drying method exists energy consumption big, and energy loss is big, and thermo-efficiency is not high, and the foul smell in the mud such as overflows easily at shortcoming.
Summary of the invention
The purpose of this invention is to provide a kind of dehydration and drying method and system that can overcome the deficiency point of traditional sludge dehydration and drying method, the cardinal principle of its dehydration and drying foundation comprises that reduction air pressure can reduce the boiling point of water, water can ebullition, gasification be water vapour in the boiling point heat absorption, and the water coolant steam can liquefy and be water, and gas can be automatically by the air pressure height to principles such as air pressure lower diffusions.The principle of the deactivation foundation of worm's ovum and microorganism is under the vacuum, and the biological cell wall inside and outside differential pressure collapses to worm's ovum and bacteria inactivation rate greatly.
The step of the vacuum boiling sludge dewatering and drying method that adopts of the present invention is: (1) vacuumizes the container sealing and the degassing, comprise the condensate trap jar of sealing is pumped into and is high vacuum, the gas pounds per square inch absolute (psia) is equal to or less than in the condensate trap jar this moment water saturation vapour pressure under the temperature in the condensate trap jar, and keep this pressure with vacuum pump, and the boiling groove jar that good seal is equipped with mud is pumped into is high vacuum, up to its pounds per square inch absolute (psia) water saturation vapour pressure under the temperature that equals to seethe with excitement this moment in the groove jar; (2) boiling groove jar and the condensate trap jar into high vacuum taken out in the connection degassing; (3) radiating pipe of heat pump connection is given the heating of boiling groove jar mud, is water vapour with water boiling in the mud; Water vapour in the prolong cooling condensation groove jar that heat pump connects, and liquefaction is water, makes boiling groove jar internal gas pressure and condensate trap jar internal gas pressure form pressure reduction simultaneously, the interior water vapour of boiling groove jar is to condensate trap jar internal diffusion; (4) by refrigeration compressor, in the condensate trap jar or other comprise low-temperature heat sources such as atmosphere, underground heat, absorb the boiling groove jar at heat transferred high temperature place; Wherein, temperature is inconsistent with the interior temperature of boiling groove jar in the condensate trap jar, there is the temperature difference, and temperature is greater than temperature in the condensate trap jar in the groove jar of guaranteeing to seethe with excitement, keep the condensate trap jar and the condition of high vacuum degree of the groove jar that seethes with excitement with vacuum pump, make the interior water of boiling groove jar at normal temperature, or than under the slightly high temperature of normal temperature, wherein water also can seethe with excitement, but water does not seethe with excitement in the condensate trap jar; The pounds per square inch absolute (psia) of the condition of high vacuum degree of indication herein is at 0.6KPa~20KPa, and the normal temperature of indication is between 0 ℃~60 ℃; The thermal-pump unit that forms with equipment such as refrigeration compressors is in the condensate trap jar or other comprise low-temperature heat sources such as atmosphere, underground heat, absorbs the boiling groove jar at heat transferred high temperature place.
The technical solution adopted in the present invention, be to form the cover system of combination on request, comprise refrigeration compressor 1, salable vacuum water vapour condensation groove jar (hereinafter to be referred as the condensate trap jar) 2, prolong 3, the vacuum pump (hereinafter to be referred as vacuum pump) 4 that contains deodorization functions, sealable vacuum boiling groove jar (hereinafter to be referred as boiling groove jar) 5, pipeline 6, valve 7, the vacuum pump (hereinafter to be referred as vacuum pump) 8 that contains deodorization functions, radiating pipe 9, jar 10 at the bottom of the condensate trap jar, valve 11, valve 12 contains the vacuum pump (hereinafter to be referred as vacuum pump) 13 of deodorization functions, pipeline 14.Wherein refrigeration compressor 1, prolong 3, radiating pipe 9 connect together by pipeline 14, form thermal-pump unit, heat passage sub-system in the construction system, jar 10, valve 11, valve 12 connect together and form the dehydration sub-system at the bottom of condensate trap jar 2, boiling groove jar 5, pipeline 6, valve 7, the condensate trap jar.Jar 10 at the bottom of vacuum pump 4 connection condensate trap jars 2, vacuum pump 8 connection boiling groove jars 5, the vacuum pump 13 connection condensate trap jars.By the correlation function and the combination function of each equipment in this system, realize following ability.
The one, utilize the boiling groove jar in the system, loading mud also makes it and extraneous operating environment isolation, and vacuum pump wherein has deodorization functions simultaneously, and the foul smell in the mud can not be overflowed, and guarantees that the foul smell in the mud can not make operating environment worsen.The 2nd, by the effect of the vacuum pump in the system, in boiling groove jar and condensate trap jar, form high vacuum, make the water in the mud in the vacuum boiling groove jar that is in sealing, at normal temperatures and under the temperature a little more than normal temperature, can ebullition, gasification be water vapour also.Pass through cold compressor 1 wherein simultaneously, prolong 3, radiating pipe 9 connects together by pipeline 14, the thermal-pump unit that forms, comprise atmosphere from the condensate trap jar of low temperature or other, low-temperature heat source places such as underground heat absorb the boiling groove jar at heat transferred high temperature place, and keep the temperature difference that boiling groove jar and condensate trap jar form, cause the water vapour air pressure in the two groove jars inconsistent, the interior water vapour of the groove jar that wherein seethes with excitement is higher than the condensate trap jar, thereby use water vapour automatically in the boiling groove jar to condensate trap jar internal diffusion, and the liquefaction that is cooled in the condensate trap jar is water, reach the purpose of dehydration, the water of Tuo Liing is water of condensation simultaneously, does not have secondary pollution, can directly discharge.The 3rd, accept processed in the long vacuum environment, most of worm's ovum and microbial cell wall inside and outside differential pressure are big, cause cell wall rupture, reach to kill worm's ovum and microorganism purpose in the mud.The 4th, the heat pump heat supply technology that adopts substitutes traditional to the mud heat supply, improves heating capacity.
Description of drawings
Accompanying drawing is the system schematic of enforcement vacuum boiling sludge dewatering and drying method, among the figure: refrigeration compressor 1, condensate trap jar 2, prolong 3, vacuum pump 4, boiling groove jar 5, pipeline 6, valve 7, vacuum pump 8, radiating pipe 9, jar 10 at the bottom of the condensate trap jar, valve 11, valve 12, vacuum pump 13.
Embodiment
After setting system, refrigeration compressor 1 in elder generation's start-up system, be communicated with the prolong 3 that is positioned at condensate trap jar 2, provide metastable low temperature A by refrigeration compressor 1 for condensate trap jar 2, start band deodorizing device of air vacuum pump 4, it is consistent with saturated vapor pressure under the A temperature to be evacuated to vacuum tightness, and keeps this vacuum tightness.With the mud of the accepting boiling groove jar 5 of packing into, sealing boiling groove jar 5, to seal boiling groove jar 5 by pipeline 6 is connected with the condensate trap jar 2 that seals earlier and vacuumize, but close by condensate trap jar 2 end valve doors 7 on the pipeline 6, utilize the vacuum pump 8 suction boiling groove jars of band deodorizing device of air to become vacuum, the Saturated water vapor pressure under vacuum tightness and corresponding envrionment temperature B etc.Open valve 7, boiling groove jar 5 is communicated with the condensate trap 2 that seals earlier and vacuumize, the groove jar 5 interior radiating pipes 9 that will seethe with excitement are simultaneously connected with refrigeration compressor 1, provide metastable high temperature C by refrigeration compressor 1 for boiling groove jar 5, impel in the boiling groove jar 5 that water heat absorption boiling is water vapour in the mud, and to low condensate trap jar 2 internal diffusion of air pressure, after arriving in the condensate trap jar 2, run into the cooling of the prolong 3 that is positioned at condensate trap jar 2, liquefaction is water, because action of gravity, splash into jar 10 at the bottom of the condensate trap jar.Treating that water of condensation runs up to floods valve 11, valve-off 11, make at the bottom of the condensate trap jar and the vacuum insulation of condensate trap jar, open valve 12, after discharging water of condensation, utilize vacuum pump 13 to take out the condensate trap jar at the bottom of jar 10 vacuum consistent to vacuum tightness with saturated vapor pressure under the A temperature, valve-off 12, open valve 11, continue to accept water of condensation.After sludge dewatering reached requirement in the boiling groove jar 5, valve-off 7 made the vacuum insulation of boiling groove jar 5 and condensate trap jar, disconnection pipeline 6.Open boiling groove jar 5, the mud after the taking-up dehydration, continuation is packed the mud of accepting into and is carried out next one circulation after boiling groove jar 5 seals.
Claims (3)
1. vacuum boiling sludge dewatering and drying method is characterized in that, the step of method is:
(1) container sealing and the degassing are vacuumized, comprise the condensate trap jar of sealing is pumped into and is high vacuum, the gas pounds per square inch absolute (psia) is equal to or less than in the condensate trap jar this moment water saturation vapour pressure under the temperature in the condensate trap jar, and keeps this pressure with vacuum pump; And the boiling groove jar that good seal is equipped with mud is pumped into is high vacuum, up to its pounds per square inch absolute (psia) water saturation vapour pressure under the temperature that equals to seethe with excitement this moment in the groove jar;
(2) boiling groove jar and the condensate trap jar into high vacuum taken out in the connection degassing;
(3) radiating pipe of heat pump connection is given the heating of boiling groove jar mud, is water vapour with water boiling in the mud; Water vapour in the prolong cooling condensation groove jar that heat pump connects, and liquefaction is water, makes boiling groove jar internal gas pressure and condensate trap jar internal gas pressure form pressure reduction simultaneously, the interior water vapour of boiling groove jar is to condensate trap jar internal diffusion;
(4), absorb the boiling groove jar of heat transferred high temperature in the condensate trap jar by refrigeration compressor;
Wherein, temperature is inconsistent with the interior temperature of boiling groove jar in the condensate trap jar, has the temperature difference, and the interior temperature of the groove jar of will guaranteeing to seethe with excitement is greater than temperature in the condensate trap jar; Keep the condensate trap jar and the condition of high vacuum degree of the groove jar that seethes with excitement with vacuum pump, the interior water of boiling groove jar also can be seethed with excitement at normal temperatures, but water does not seethe with excitement in the condensate trap jar; The pounds per square inch absolute (psia) of the condition of high vacuum degree of indication herein is at 0.6KPa~20KPa, and the normal temperature of indication is between 0 ℃~60 ℃.
2. vacuum boiling sludge dewatering and drying method according to claim 1 is characterized in that, absorbs the boiling groove jar of heat transferred high temperature in the condensate trap jar with the thermal-pump unit that comprises refrigeration compressor.
3. implement the vacuum boiling sludge dewatering and drying system of the described method of claim 1, it is characterized in that: this system comprises refrigeration compressor (1), salable vacuum water vapour condensation groove jar (2), prolong (3), the vacuum pump one (4) that contains deodorization functions, sealable vacuum boiling groove jar (5), pipeline one (6), valve one (7) contains the vacuum pump two (8) of deodorization functions, radiating pipe (9), jar at the bottom of the condensate trap jar (10), valve two (11), valve three (12), the vacuum pump three (13) that contains deodorization functions, pipeline two (14); Wherein refrigeration compressor (1), prolong (3), radiating pipe (9) connect together by pipeline two (14), the thermal-pump unit that forms, heat passage sub-system in the construction system, condensate trap jar (2), boiling groove jar (5), pipeline one (6), valve one (7), jar at the bottom of the condensate trap jar (10), valve two (11), valve three (12) connect together and form the dehydration sub-system; Jar (10) at the bottom of vacuum pump one (4) connection condensate trap jar (2), vacuum pump two (8) connection boiling groove jars (5), vacuum pump three (13) the connection condensate trap jars.
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CN2008101984820A CN101671104B (en) | 2008-09-12 | 2008-09-12 | Vacuum boiling sludge dewatering and drying method and system |
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CN2008101984820A CN101671104B (en) | 2008-09-12 | 2008-09-12 | Vacuum boiling sludge dewatering and drying method and system |
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CN101671104A CN101671104A (en) | 2010-03-17 |
CN101671104B true CN101671104B (en) | 2011-08-17 |
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CN104900882A (en) * | 2015-06-09 | 2015-09-09 | 天津巴莫科技股份有限公司 | Dispersing agent recovering device, dispersing agent recovering method and method for preparing lithium manganese phosphate by using method |
CN111517614A (en) * | 2020-05-28 | 2020-08-11 | 杨缤 | Superconducting dry-wet separator |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN87102717A (en) * | 1986-04-08 | 1988-01-13 | 海因茨·艾科尔兹 | Vacuum condensation of water vapour |
US5171455A (en) * | 1991-10-18 | 1992-12-15 | International Environmental Systems, Inc. | Method and apparatus for separation of toxic contaminants by nebulization |
US6436242B1 (en) * | 2000-02-10 | 2002-08-20 | Pedro Joaquin Sanchez Belmar | Device and method for distilling water |
CN101168467A (en) * | 2007-09-28 | 2008-04-30 | 天津大学 | Sludge replacing and dewatering method and device |
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2008
- 2008-09-12 CN CN2008101984820A patent/CN101671104B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN87102717A (en) * | 1986-04-08 | 1988-01-13 | 海因茨·艾科尔兹 | Vacuum condensation of water vapour |
US5171455A (en) * | 1991-10-18 | 1992-12-15 | International Environmental Systems, Inc. | Method and apparatus for separation of toxic contaminants by nebulization |
US6436242B1 (en) * | 2000-02-10 | 2002-08-20 | Pedro Joaquin Sanchez Belmar | Device and method for distilling water |
CN101168467A (en) * | 2007-09-28 | 2008-04-30 | 天津大学 | Sludge replacing and dewatering method and device |
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