CN102674924A - Airlift cylinder type reactor and urban sludge composting processing system using same - Google Patents
Airlift cylinder type reactor and urban sludge composting processing system using same Download PDFInfo
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- CN102674924A CN102674924A CN2011100647338A CN201110064733A CN102674924A CN 102674924 A CN102674924 A CN 102674924A CN 2011100647338 A CN2011100647338 A CN 2011100647338A CN 201110064733 A CN201110064733 A CN 201110064733A CN 102674924 A CN102674924 A CN 102674924A
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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
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Abstract
The invention relates to an airlift cylinder type reactor and an urban sludge composting processing system using the same. The airlift cylinder type reactor comprises a reactor body, a circular backflow system, a gas-liquid two-phase reverse diversion exchange device, an air input device, a sludge feeding device and a sludge discharge device. The circular backflow system comprises a center cylinder arranged in a long cylinder reactor, an annular airlift zone is formed by the center cylinder and a cylinder of the long cylinder reactor; the zone in the center cylinder is a fluid flow dropping zone. The gas-liquid two-phase reverse diversion exchanging device comprises an annular gap type fluid director, an air deflector and a bubble deflector. The sludge treatment system provided by invention can realize two composting treatments and finish the gas and fluid separation by only one reactor, and the returning and mixing of the sludge cannot appear; the system has high treatment efficiency, the organism content in the treated sludge product is reduced, and the sludge can be used as the soil conditioner applied to land or garden.
Description
Technical field
The present invention relates to a kind of treatment facility that is applied to the municipal sludge liquid compost; Particularly; Relate to the gas lift cartridge reactor of a kind of built-in " gas-liquid two-phase reverse guide switch ", and utilize this gas lift cartridge reactor to carry out the treatment system of municipal sludge liquid compost.
Background technology
Urban sewage sludge compost is a kind of process that mikrobe is fermented in the mud of utilizing.Organism will be a stable product by biological degradation in the mud.Present known aerobic compost is to utilize the solid-state compost of dewatered sludge mud cake for raw material, general widespread use air blast static compost, bar buttress formula compost and reactor drum compost arranged.The general efficient of solid-state composting process is low, and cost is high, is prone to produce secondary pollutions such as foul smell, mosquitos and flies.
Also do not have at present the liquid composting process of mud of publicity, we develop the sludge treatment technique more efficient, energy-conservation than ATAD with reference to close with it known high-efficiency aerobic sludge digestion technology ATAD (high temperature aerobic digestion automatically heats up).
Automatically intensification high temperature aerobic digestion ATAD is a kind of mikrobe endogenous respiration principle of utilizing, and mikrobe protoplasma biodegrade is utilized, and directly performance is carried out the technology that bio-oxidation is removed to organism in the excess sludge.In ATAD technology, charging mud need carry out pre-concentration usually, and reactor drum need carry out the heat insulating processing.In reactor drum, accomplish digestion, stable and sterilization to the pre-concentration primary sludge.ATAD obtains research and development in the sixties in 20th century, Europe and North America are used more extensive now.The ATAD system has 2 ~ 3 reactor drums to form systems usually, and in 45 ~ 60 ℃ thermophilic digestion scope, digests, and the source of its heat is fully from the release of heat in the endogenous respiration process, and need not add heat.1 kilogram of organism of every bio-oxidation can discharge the heat energy of about 20000kJ in the sludge aerobic digestive process, heats up automatically and ATAD utilizes this part biological heat release to carry out system just, and this also is its origin of gaining the name.
For the killing of pathogenic agent in the mud,, just in the corresponding disinfecting time of certain temperature and this temperature, can produce the extinction effect among the ATAD to pathogenic agent based on pasteurization.According to the U.S. environmental protection united can EPA pasteurization data among the CFR40 Reg503: under 55 ℃, the sterilization required time is approximately 72 hours, and approximately only needs 2.5 hours down at 65 ℃.Can reach high actual motion temperature to 67 ℃ according to the design of EPA and German ATAD and operation standard A TAD, this just makes accomplishes sewage sludge disinfection simultaneously and becomes possibility in digestive process.
In a traditional ATAD system, generally there are two to three aeration tanks to be connected into a system, primary sludge is with in the preface batch mode entering system.Its typical aeration and alr mode are to utilize impeller and venturi tube to carry out aeration.Because the temperature of advancing mud, is in low-temperature digestion temperature upper end and mesophilic digestion temperature lower end at 10 ~ 20 ℃.During initial start-up, the low-temperature digestion bacterium consumes the organic matter in the mud and produces enough heats are warming up to thermophilic digestion TR (45 ℃ ~ 60 ℃) to reactor drum lower end.Subsequently, the thermophilic digestion bacterium becomes the advantage thalline, to the further oxidation of biological sludge and promote the mud temperature to about 50 ~ 55 ℃.This step reaction process approximately can occupy 60% of the whole bio-oxidation of two pond body formula ATAD.First reactor drum can not be killed the virus in the mud fully.
2 reactor drums of tradition ATAD technology series connection, sludge retention time is 5 days.Operation scheme is: all stop aeration one hour every day, 2/5 sludge volume in No. two reactor drums is discharged system, and the sludge volume of about 2/5 in reactor drum is delivered in No. two reactor drums, and a reactor drum gets into primary sludge immediately and is full of.Aeration is 23 hours subsequently, and repeats above-mentioned circulation.No. one reactor drum keeps its volume of 3/5, heat and high temperature collarium border and can carry out thermophilic digestion to advancing mud.No. two reactor drums are accepted to the more important thing is from the mud that contains the high temperature bacterium in the reactor drum, are accepted to shift the latent heat that contains in the sludge stream.Even the transfer of this heat makes No. two reactor drums in getting into No. two mud in the reactor drum under the organic amount minimizing situation, be warming up to the upper end of thermophilic digestion TR and the lower end (55 ~ 65 ℃) of narrow temperature bacteria growing TR,
Early stage once in order to shorten the flow process of ATAD; And original two ponds (or three ponds) tandem process is revised as single pool process; The ATAD that its result shows single pond than more than 10 ~ 15 days sludge retention time of pond series connection needs; This is that when batching mud, charging mud can be accomplished mud to digestion in the reactor drum and produce the effect that inoculate because the ATAD in single pond can't solve the problem of will finish dealing with mud and the separation of charging mud.
In ATAD, it mainly is in order to satisfy the time needs of organic matter biodegradation that mud stops.Mean also that in the design of ATAD sludge retention time is by the speed decision of biological respinse.
The deficiency of ATAD digestion process has:
1) ATAD is in order to prevent charging mud " inoculating " to discharging mud, adopts classification (secondary or three grades) reactors in series operation form, and number is many, and equipment, connection and operation scheme all show complicacy;
2) ATAD utilizes the mechanical stirring mode that mud is stirred, and makes mud be in suspended state.Churned mechanically method has just promoted the mass transfer of mud and oxygen among the ATAD; And the thermophilic digestion bacterium is not effectively refluxed; This has just directly caused in the first sludge aerobic digestion reaction device; Must come organism is degraded lentamente through mesophilic digestion earlier, and system is heated up lentamente;
3) in the ATAD mud product N with NH
4 +Form exists, and contains a large amount of protein, fats in the mud product, and the existence of univalent cation and high molecular polymer has influenced the dewatering of mud product to the adsorption bridging effect deleterious impact of coagulation.
Known airlift reactor generally all is that physical construction is simple in the environmental protection field, and contains the structure of a gas/liquid two-phase, and biphase gas and liquid flow circulates in the concentric backflow space of a particular design.The power of liquid motion comes from the rising space and decline spatial density difference.Airlift reactor is made up of the character zone that some have different waterpower fluidised forms usually.Comparatively be typically and in the rising space, carry out the gas injection, and produce fluid density decline, bring upwards flowing of biphase gas and liquid flow thus.At the top of reactor drum, a gas-liquid separation zone is arranged usually, the normally horizontal plug-flow of this regional hydraulic characteristic, and gas will be separated from liquid phase.Flow density after the degassing increases, and gets into and flow downward along this zone in the zone that descends and finally get into elevated areas again, forms a circulation.There is an extra space reactor that the import of rising area is coupled together with the outlet of distinguishing that descends in the lower end in two zones of rising and descend.
The needed air decanting point of biological respinse is positioned at the decline space, and the cycle rate of operating requirement reactor drum inner fluid provides (fall off rate>0.5m/s) by the needed air of biological respinse, and is controlled at certain scope.Increase the air delivery rate and can satisfy bigger biological aerobic requirement; The augmenting response device is handled load; Bring the increase of fluid cycle rate simultaneously; And the increase of cycle rate directly can cause the potentiality saturation solubility of oxygen in the fluid to reduce, and microbial respiratory speed descends, and finally showing as reactor efficiency can not maximize.
Therefore, need a kind of treatment system and can be controlled under the aeration rate that satisfies biochemical needs, the whole circular flow velocity is still controlled, and circulation velocity is increased.
Summary of the invention
The gas lift cartridge reactor that the purpose of this invention is to provide a kind of built-in " gas-liquid two-phase reverse guide switch " with the composting material of liquid state, utilizes the inner circulating reflux system to carry out the one-level compost treatment; Utilize " gas-liquid two-phase reverse guide switch " to carry out the secondary compost treatment, in a gas lift cartridge reactor, carry out two-stage compost treatment and gas-liquid two-phase and separate, realize merging original ATAD two-stage reactor; The back-mixing that mud can not occur; The processing cycle is short, and processing efficiency is high, and is satisfying under the aeration rate of biochemical needs; Circulation velocity is controlled, can not increase because of tolerance circulation velocity is increased.
In order to achieve the above object, the invention provides a kind of gas lift cartridge reactor, this gas lift cartridge reactor comprises:
Reactor body, this reactor body comprise long barrel reactor and top water tank;
Be arranged on the pump around circuit system in the reactor body, mud fully handled through internal recycle,
Be arranged on the gas-liquid two-phase reverse guide switch that pump around circuit system below and next-door neighbour are provided with, so that the liquid after the pump around circuit system handles is carried out the secondary compost treatment;
Air input unit in the long barrel reactor is set, and this air input unit links to each other with air intake pipe independently;
The mud that is arranged on long barrel reactor one side advances the mud device; And
The mud that the is arranged on long barrel reactor bottom device that effluents, this mud mud extraction device connects follow-up dehydration equipment mud inlet;
Described pump around circuit system comprises: be arranged on the center drum in the long barrel reactor, this center drum forms the annular gas elevated areas with the cylindrical shell of long barrel reactor, and it is regional that the zone in this center drum is that flow descends;
Described gas-liquid two-phase reverse guide switch comprises:
Be arranged on the annular space formula director of center drum lower end, have the slit on this annular space formula director, promptly the guiding fluid mouth is used to guide air to carry liquid and rises;
Be arranged on the air baffle of annular space formula director below, this air baffle comprises traverse baffle and following traverse baffle, and traverse baffle forms the slit with following traverse baffle on this, and promptly the gas channeling mouth is used for guiding air to pass through from the gas channeling mouth of this flow deflector, and
Be arranged on the bubble flow-stopping plate of air baffle below, be used for making making things convenient under the liquid flow and stopping bubble.
Above-mentioned gas lift cartridge reactor, wherein, the aspect ratio of described long barrel reactor surpasses 15.
Above-mentioned gas lift cartridge reactor wherein, also is provided with waste gas exhaust pipe on the water tank of described top, is used to get rid of the gas after the gas-liquid separation.
Above-mentioned gas lift cartridge reactor wherein, also is provided with the flow shoe of guiding from the gas-liquid mixture entering liquid decline zone that the annular gas elevated areas rises on the top of described center drum.
Above-mentioned gas lift cartridge reactor, wherein, described annular space formula director is the platy structure of annular space.
Above-mentioned gas lift cartridge reactor, wherein, described air input unit is for connecting the tubular structure of center drum, and its exit end is positioned at the below of center drum.
Above-mentioned gas lift cartridge reactor, wherein, the exit end of described air input unit is set to hydraucone.
Above-mentioned gas lift cartridge reactor, wherein, it is the bend pipe structure with mud extraction direction exit end consistent with air flow line that described mud advances the mud device, this exit end is positioned at the bottom of annular gas elevated areas.
Above-mentioned gas lift cartridge reactor, wherein, the described mud device that effluents comprises high-temperature sterilization district and the mud mouth that is arranged on long barrel reactor bottom.
" the gas-liquid two-phase reverse guide switch " that gas lift cartridge reactor of the present invention is built-in, it comprises annular air baffle and annular space formula director and bubble flow-stopping plate.Air can form air cushion in the air guide plate; " back-mixing " that stops flow; Gas phase is separated in said device with liquid phase in the biphase gas and liquid flow; And liquid phase fluid can only get into lower region from the unidirectional undercurrent of said device upper area, and is opposite, and gaseous fluid can only be from zone, the unidirectional up-flow of lower region to top; The regional waterpower state of two portions that is separation with said " gas-liquid two-phase reverse guide switch " with this process completion separates, and realizes the merging with original ATAD two-stage reactor.
Supply with under the constant situation in the air total amount, increase air and the loss of head of fluid in reactor drum, can effectively reduce air, thereby reduce the fluidic cycle rate for the fluidic castering action.And the loss amount of pressure head can be controlled according to the variation that difference is shunted the guide frame size.On said " gas-liquid two-phase reverse guide switch ", be provided with gas-liquid shunting guide frame (being the shunting guide frame that air baffle combines annular space formula director); Biphase gas and liquid flow is effluented from gas channeling mouth and guiding fluid mouth respectively; Structural changes through shunting guiding is finally controlled the fluidic circulation velocity with the pressure drop of control biphase gas and liquid flow.
Gas lift cartridge reactor of the present invention includes internal recycle district, secondary compost district and high-temperature sterilization district three isolating standalone features of waterpower district, respectively the digestion process and the virus of mud is killed the enforcement unit operation.
Long barrel reactor top and top water tank are formed the internal recycle district; The internal recycle district comprises the center drum of a diameter less than long barrel reactor, and this center drum is installed in the top of long barrel reactor, and center drum forms an annular space with long barrel reactor wall; The upper and lower of this annular space is connected with long barrel reactor space through the top water tank respectively; Forming a complete circulation loop, is the decline district of mud in the center drum, and annular space is the rising area of mud.
Secondary compost district is positioned at below the internal recycle district, and bottom, secondary compost district is provided with the outlet of air input unit, is the whole reactor air feed, and secondary compost district accepts the mud extraction from the internal recycle district, and this is a unidirectional sludge stream.
It is following until the bottom of long barrel reactor that the high-temperature sterilization district is positioned at the fully mixing mixing zone, in bottom, high-temperature sterilization district mud mouth is set.
The present invention also provides a kind of urban sewage sludge compost treatment system that comprises described gas lift cartridge reactor, and this treatment system comprises:
Grid device is used for sieving charging mud bulk solid;
The gas lift cartridge reactor of built-in gas-liquid two-phase reverse guide switch adopts the mud after grid device is handled to enter into above-mentioned gas lift cartridge reactor through fresh feed pump; And
With the dewatering unit of the bottom discharge pipe coupling of gas lift cartridge reactor, this dewatering unit comprises pond and sludge dewatering equipment in the middle of the mud of the storage mud that connects through sludge pump.
In treatment system of the present invention, the former liquid mud after concentrating passes through grid device, preliminary solids removed by filtration dregs; Then; Through fresh feed pump, enter into the gas lift cartridge reactor and carry out internal recycle processing, secondary compost treatment, gas-liquid separation and enter into the sterilization of high-temperature sterilization district, the mud mouth through the bottom is input to pond in the middle of the mud that stores mud at last; Through the sludge dewatering equipment processed, accomplish urban sewage sludge compost and handle again.
The present invention is a raw material with the liquid sludge after concentrating, and in cartridge type gas lift reactor drum, carries out the aerobic fermentation compost.Mud owing to the endogenous respiration effect of mikrobe, utilizes solvability oxygen that the protoplasma degraded will be generated CO in composting process
2, and be dissolved in and form CO in the solution
3 2-Ion.NH
4 +Can with free CO in the solution
3 2-Ionic bond forms hydrocarbonate, and makes NH
4 +Fixed, eliminated NH
4 +Influence for dewatering performance of sludge.
The invention has the beneficial effects as follows:
1. the one-tenth that obtains becoming thoroughly decomposed in the time at 4 ~ 6 days compost is fertile, and satisfies organic content simultaneously and remove more than 40%, and oxygen intake rate is lower than 1.5mgO
2/ h/g;
2. contain NO in the compost mud
3-N, and NH
4-N seldom reaches the mud standard of becoming thoroughly decomposed;
3. in said " gas-liquid two-phase reverse guide switch ", can accomplish once to the loss of air pressure head, once to air/flow two phase loss of head and accomplish being separated of gas-liquid two-phase; Finally reach convection cell step-down 1.5m ~ 5.5m, at 0.18 ~ 0.30m/s, and the liquid that can not " back-mixing " of said " gas-liquid two-phase reverse guide switch " bottom gets into top with the flow rate control of fluid in elevated areas;
In " the plug-flow district " of discharge end mud can back-mixing to the raceway, top, mud can obtain sterilization in this zone;
5. the no movable part of device keeps in repair few.
Description of drawings
Fig. 1 is the front view of a kind of gas lift cartridge reactor of the present invention.
Fig. 2 is applied to the treatment system of urban sewage sludge compost for a kind of gas lift cartridge reactor of the present invention.
Embodiment
Do explanation further below in conjunction with accompanying drawing and embodiment specific embodiments of the invention.
As shown in Figure 1, gas lift cartridge reactor 100 provided by the invention comprises: reactor body, pump around circuit system, gas-liquid two-phase reverse guide switch 30, air input unit 40, mud advance mud device 50, and the mud device that effluents.
Described reactor body comprises the long barrel reactor 11 and the top water tank 12 of the underground perpendicular elongate with outer wall; The aspect ratio of this long barrel reactor 11 surpasses 15; The setting of this structure is in order under the situation that obtains big reaction compartment, to reduce floor space simultaneously, and what is more important can be obtained bigger dissolved-air pressure to improve oxygen utilization rate.
Described pump around circuit system is arranged in the long barrel reactor 11; It comprises the center drum 21 that is arranged in the long barrel reactor 11; Itself and the centres of long barrel reactor 11; And extending longitudinally to about 3/4 place of long barrel reactor 11 length, spaces form flow in the reactor drums zone 212 that descends in the center drum 21.Annular space zone between long barrel reactor 11 and the center drum 21 is the complete mixing region of reactor drum flow, and promptly the gas elevated areas 211.Top at center drum 21 also is provided with flow shoe 22; Guide to the flow district 212 that descends with the mud of the complete admixture of gas-liquid that will rise to top water tank 12; Make the gas-liquid initial gross separation; The vapor pipe 121 of gas water tank from the top is discharged, and liquid phase descends through flow and distinguishes 212 entering circulation loops.
Described gas-liquid two-phase reverse guide switch 30 next-door neighbours are arranged on pump around circuit system below; Be welded on long barrel reactor 11 inwalls; This gas-liquid two-phase reverse guide switch 30 comprises: be arranged on the annular space formula director 31 of center drum 21 lower ends, this space formula director 31 is a tabular, also comprises annular slot; Be guiding fluid mouth 311, be used to guide air to carry liquid and enter into gas elevated areas 211 through this guiding fluid mouth 311; Be arranged on the air baffle 32 of annular space formula director 31 belows; This air baffle comprises traverse baffle, following traverse baffle and is arranged on the space between the traverse baffle up and down; The space of this flow deflector is a gas channeling mouth 321, is used for guiding air to pass through from this gas channeling mouth 321; And be arranged on the bubble flow-stopping plate 33 of air baffle 32 belows, be used to stop bubble and the bubble drainage is got into gas-liquid two-phase reverse guide switch 30.Rely on the connection rib (not shown) of welding polylith symmetric arrangement to be connected between described annular space formula director 31 and the air baffle 32 and fix.
Top water tank 12 with flow shoe 22 and exhaust pipe 121 is positioned at the top of center drum 21; One end of this flow shoe 22 is connected with the top of center drum 21, and flow shoe 22 spatial communication in top water tank 12 is passed through with gas elevated areas 211 in flow decline zone 212.Wherein, Flow shoe 22 can guide the flow direction center drum zone from gas elevated areas 211; Be flow decline zone 212, and the bubble that carries in flow vertical uplift in top water tank 12 reach the purpose of preliminary gas-liquid separation through waste gas exhaust pipe 121 dischargings; Descend zone 212 of flow is communicated with the upper space of gas elevated areas 211 through gas-liquid two-phase reverse guide switch 30.Be the decline district of mud in the center drum, annular space is the rising area of mud, in reactor body, forms a complete circulation loop, and the mud that gets in the gas lift cartridge reactor is accomplished the one-level compost treatment earlier in this circulation loop.
Described annular space formula director 31 is an annular space formula director slab construction, on flat board, cracks, and the circulating fluid in the reactor drum will flow out through this slit (being guiding fluid mouth 311), in this process, accomplishes convection cell and accomplishes a loss of head.In operational process; The flow that process center drum 21 descends is under the lifting of the bubble that air baffle 32 overflows; The guiding fluid mouth 311 that forms through annular space formula director 31 enters into gas elevated areas 211; Bubble and flow were mixed in together and got in the space, the complete mixing region of reactor drum (being gas elevated areas 211) through the slit this moment, carried out circular treatment.
Said air baffle 32 comprises traverse baffle and following traverse baffle, and traverse baffle is ring texture up and down, and the rib of dependence welding polylith symmetric arrangement connects and be fixing.When operation; In the slit that traverse baffle and long barrel reactor outer wall formed under bubble was got into by bubble flow-stopping plate 33 water conservancy diversion earlier; Get in the space of going up traverse baffle and the formation of reactor drum outer wall through slit; Because the natural vertical uplift characteristic of bubble in liquid phase will make within its space that is filled in traverse baffle and the formation of reactor drum outer wall and form air cushion, separates the fluid liquid of being brought into by bubble with this; The pressure that this air cushion brought makes in its slit (being gas channeling mouth 321) via last traverse baffle and the formation of following traverse baffle to pressure in bubbles simultaneously and gets into traverse baffle down, and overflows from the outside of following traverse baffle.Gas after the gas-liquid separation rises through gas channeling mouth 321, and the unidirectional secondary compost district that flow into of fluid liquid.In this process, not only accomplish the loss decompression of air pressure head, accomplished separating of gas phase and liquid phase simultaneously.The effect of accomplishing this gas-liquid separation can make the reactor area fluid liquid under the gas-liquid two-phase reverse guide switch 30 can not " back-mixing " to top, form independently waterpower " plug-flow district ".
Described air input unit 40 is arranged in the long barrel reactor 11, and for connecting the tubular structure of center drum 21, its exit end 41 is positioned at the below of center drum 21; This exit end 41 preferably is set to the hydraucone aeration head, is beneficial to a large amount of rapid diffusion of gas.Exit end 41 and " the plug-flow district " between the bubble flow-stopping plate 33 with gas input device of hydraucone aeration head are positioned at the below of said gas-liquid two-phase reverse guide switch 30, make mud can back-mixing to the raceway, top.
Described mud advances the side that mud device 50 is arranged on long barrel reactor 11; This mud advances mud device 50 for having the bend pipe structure of the mud extraction direction exit end consistent with air flow line 51; This exit end 51 is positioned at the bottom of annular gas elevated areas 212; And the bottom that is higher than annular gas elevated areas 212 makes charging mud to be carried by upflowing air smoothly and gets into the raceway, begins the compost treatment that circulates.
The described mud device that effluents comprises high-temperature sterilization district 61 and the mud mouth 62 that is arranged on long barrel reactor 11 bottoms.The district's mud extraction of secondary compost is from flowing into the 3rd reaction zone in gas lift cartridge reactor bottom, i.e. high-temperature sterilization district 62, aeration is not carried out in this zone, utilize in the zone high temperature with provide enough residence time that pathogenic agent in the mud is killed; Mud becomes gas lift cartridge reactor device and finally handles back mud behind the high-temperature sterilization, and mud mouth 62 effluents from the bottom, collects.
As shown in Figure 2, the present invention also provides a kind of above-mentioned gas lift cartridge reactor has been applied to the treatment system of urban sewage sludge compost, and this system comprises:
Grid device 200 is used for sieving charging mud bulk solid;
The gas lift cartridge reactor 100 of built-in gas-liquid two-phase reverse guide switch adopts the mud after grid device 200 is handled to enter into above-mentioned gas lift cartridge reactor 100 through fresh feed pump 201;
With the dewatering unit 300 of the bottom discharge pipe coupling of gas lift cartridge reactor 100, this dewatering unit 300 comprises pond 301 and sludge dewatering equipment 302 in the middle of the mud of the storage mud that connects through sludge pump 303.
The present invention also provides a kind of " gas-liquid two-phase reverse guide switch " has been installed in the gas lift cartridge reactor, is applied to the method for municipal sludge liquid compost, and it may further comprise the steps:
A, to be 3% ~ 4.5% primary sludge with mud solid content behind the pre-concentration via grid device remove behind the thick suspended substance through fresh feed pump is delivered in the gas elevated areas of circulation loop system of gas lift cartridge reactor;
B, high-pressure air is delivered to the air input unit of gas lift cartridge reactor through air; Guide functions through said gas lift cartridge reactor gets in the rising space in internal recycle district, top; Simultaneously, said gas lift cartridge reactor can also separate with the biphase gas and liquid flow that air forms mud, under " air cushion " blocking-up that mud forms in the gas lift cartridge reactor; Can not return and get into the internal recycle district; And after air rose via shunting, pressure head descended, and promotes for the sludge stream in the rising area and slows down;
C, under the effect of air-lift unit; Mud begins to carry out the internal recycle uniflux; In the process of circulating, the airborne oxygen of microorganism panning carries out oxygenolysis to primary sludge, is referred to as " sludge composting for the first time "; In inner cyclic process, accomplished for the first time mud behind the biological compost, be referred to as " internal recycle mud extraction "; In working cycle, accomplish stirring and the exchange of heat and the recovery of thermophilic digestion bacterium simultaneously to mud;
D, internal recycle mud extraction are left to distribute part mud (volume is equal to the final mud extraction of reactor drum) undercurrent form of unidirectional dive and unidirectional circulating sludge flow point at internal reflux; And with on flow direction; Promptly axially there is not mixing, radially then reaching complete blended plug-flow form entering bottom said " secondary compost district ", become the mud that advances in secondary compost district; In this process, mud is brought heat into secondary compost district simultaneously; Described secondary compost district is positioned at below the internal recycle district, and bottom, secondary compost district is provided with the outlet of air input unit, is the whole reactor air feed, and secondary compost district accepts the mud extraction from the internal recycle district, and this is a unidirectional sludge stream;
E, in bottom, secondary compost district, gas stirs mud, mud absorbs airborne oxygen remaining organism in the mud is carried out further oxygenolysis (sludge composting), is referred to as " for the second time sludge composting "; Mud behind the completion sludge composting second time is referred to as the district's mud extraction of secondary compost;
F, the district's mud extraction of secondary compost are referred to as " high-temperature sterilization district " from flowing into the 3rd reaction zone in gas lift cartridge reactor bottom, and aeration is not carried out in this zone, utilize the high temperature in the zone and provide enough residence time that pathogenic agent in the mud is killed;
Mud becomes gas lift cartridge reactor device and finally handles back mud behind g, the high-temperature sterilization, and mud mouth effluents from the bottom, and flows into certainly in the middle of the mud in the pond;
The pond links to each other with follow-up mechanical dewatering equipment in the middle of the h, mud, via sludge pump with compost after mud be delivered to sludge dewatering equipment and carry out sludge dewatering.
Gas lift cartridge reactor provided by the invention and be applied to the treatment system of urban sewage sludge compost; Composting material with liquid state; And utilize air input and circulation loop in the cartridge type gas lift reactor drum can satisfy processing requirements such as needed oxygen supply of composting process and stirring and refluxing, accomplish compost to mud.After in reactor drum, input air and fluid being carried out " gas-liquid separation ", and utilize air cushion to prevent the fluid back-mixing, can in reactor drum, form independently " plug-flow district " by discharge end.And the formation in independent " plug-flow district " can prevent that charging mud from taking place discharging mud " inoculating ".And technical scheme provided by the invention can be controlled under the aeration rate that satisfies biochemical needs, and the whole circular flow velocity is still controlled, and circulation velocity is increased.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (10)
1. a gas lift cartridge reactor is characterized in that, this gas lift cartridge reactor (100) comprises:
Reactor body, this reactor body comprise long barrel reactor (11) and top water tank (12);
Be arranged on the pump around circuit system in the long barrel reactor (11),
Be close to the gas-liquid two-phase reverse guide switch (30) that said pump around circuit system below is provided with;
Air input unit (40) in the long barrel reactor (11) is set,
The mud that is arranged on long barrel reactor (11) one sides advances mud device (50); And
The mud that is arranged on long barrel reactor (11) the bottom device that effluents;
Described pump around circuit system comprises: be arranged on the center drum (21) in the long barrel reactor (11); This center drum (21) forms annular gas elevated areas (211) with the cylindrical shell of long barrel reactor (11), and the zone in this center drum (21) is flow decline zone (212);
Described gas-liquid two-phase reverse guide switch (30) comprises:
Be arranged on the annular space formula director (31) of center drum (21) lower end, have the slit on this annular space formula director (31), promptly guiding fluid mouth (311) is used to guide air to carry liquid and rises;
Be arranged on the air baffle (32) of annular space formula director (31) below; This air baffle (32) comprises traverse baffle and following traverse baffle; Should go up traverse baffle and form the slit with following traverse baffle; Be gas channeling mouth (321), be used for guiding air to pass through from the gas channeling mouth (321) of this flow deflector, and
Be arranged on the bubble flow-stopping plate (33) of air baffle (32) below, be used for making making things convenient under the liquid flow and stopping bubble.
2. gas lift cartridge reactor as claimed in claim 1 is characterized in that, the aspect ratio of described long barrel reactor (11) surpasses 15.
3. gas lift cartridge reactor as claimed in claim 1 is characterized in that, also is provided with waste gas exhaust pipe (121) on the described top water tank (12).
4. gas lift cartridge reactor as claimed in claim 1; It is characterized in that, also be provided with the flow shoe (22) of guiding on the top of described center drum (21) from the gas-liquid mixture entering liquid decline zone (212) that annular gas elevated areas (211) rises.
5. gas lift cartridge reactor as claimed in claim 1 is characterized in that, described annular space formula director (31) is the platy structure of annular space.
6. gas lift cartridge reactor as claimed in claim 1 is characterized in that, described air input unit (40) is for connecting the tubular structure of center drum (21), and its exit end (41) is positioned at the below of center drum (21).
7. gas lift cartridge reactor as claimed in claim 6 is characterized in that, the exit end (41) of described air input unit (40) is set to hydraucone.
8. gas lift cartridge reactor as claimed in claim 1; It is characterized in that; Described mud advances mud device (50) for having the bend pipe structure of the mud extraction direction exit end consistent with air flow line (51), and this exit end (51) is positioned at the bottom of annular gas elevated areas (211).
9. gas lift cartridge reactor as claimed in claim 1 is characterized in that, the described mud device that effluents comprises high-temperature sterilization district (61) and the mud mouth (62) that is arranged on long barrel reactor (11) bottom.
10. urban sewage sludge compost treatment system that comprises gas lift cartridge reactor as claimed in claim 1 is characterized in that this treatment system comprises:
Grid device (200) is used for sieving charging mud bulk solid;
The gas lift cartridge reactor (100) of built-in gas-liquid two-phase reverse guide switch adopts the mud after grid device (200) is handled to enter into above-mentioned gas lift cartridge reactor (100) through fresh feed pump (201);
With the dewatering unit (300) of the bottom discharge pipe coupling of gas lift cartridge reactor (100), this dewatering unit (300) comprises pond (301) and sludge dewatering equipment (302) in the middle of the mud of the storage mud that connects through sludge pump (303).
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| CN201110064733.8A CN102674924B (en) | 2011-03-17 | 2011-03-17 | Airlift cylinder type reactor and urban sludge composting processing system using same |
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| CN201110064733.8A CN102674924B (en) | 2011-03-17 | 2011-03-17 | Airlift cylinder type reactor and urban sludge composting processing system using same |
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Cited By (4)
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| CN107311309A (en) * | 2017-08-02 | 2017-11-03 | 哈尔滨工业大学 | The micro- oxygen bioreactor of up-flow interior circulation and its aeration method and application method for strengthening mass transfer |
| CN107503976A (en) * | 2017-09-04 | 2017-12-22 | 陕西未来能源化工有限公司 | A kind of gas-liquid separation breathes oil return apparatus |
| CN111892182A (en) * | 2020-06-18 | 2020-11-06 | 广州文冲船舶修造有限公司 | Ship desulfurization washing water circulation cabin, ship desulfurization system and ship |
| CN113354238A (en) * | 2021-06-30 | 2021-09-07 | 中国石油化工股份有限公司 | Oil-containing sludge heating and separating device and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311309A (en) * | 2017-08-02 | 2017-11-03 | 哈尔滨工业大学 | The micro- oxygen bioreactor of up-flow interior circulation and its aeration method and application method for strengthening mass transfer |
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| CN107503976A (en) * | 2017-09-04 | 2017-12-22 | 陕西未来能源化工有限公司 | A kind of gas-liquid separation breathes oil return apparatus |
| CN111892182A (en) * | 2020-06-18 | 2020-11-06 | 广州文冲船舶修造有限公司 | Ship desulfurization washing water circulation cabin, ship desulfurization system and ship |
| CN111892182B (en) * | 2020-06-18 | 2022-07-22 | 广州文冲船舶修造有限公司 | Ship desulfurization washing water circulation cabin, ship desulfurization system and ship |
| CN113354238A (en) * | 2021-06-30 | 2021-09-07 | 中国石油化工股份有限公司 | Oil-containing sludge heating and separating device and using method thereof |
| CN113354238B (en) * | 2021-06-30 | 2022-07-15 | 中国石油化工股份有限公司 | Heating and separating device for oil-containing sludge and using method thereof |
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