CN105745175A - Air current circulation type low-temperature hot-air sludge drying equipment and processing method - Google Patents
Air current circulation type low-temperature hot-air sludge drying equipment and processing method Download PDFInfo
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- CN105745175A CN105745175A CN201480060411.8A CN201480060411A CN105745175A CN 105745175 A CN105745175 A CN 105745175A CN 201480060411 A CN201480060411 A CN 201480060411A CN 105745175 A CN105745175 A CN 105745175A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/16—Treatment of sludge; Devices therefor by de-watering, drying or thickening using drying or composting beds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to air current circulation type low-temperature hot-air sludge drying equipment and a processing method, and the air current circulation type low-temperature hot-air sludge drying equipment utilizes dried low-temperature air for sewage sludge generated through sewage treatment and industrial sludge generated from industrial sites, and meanwhile, continuously circulates the air discharged from a dryer through a condensation process to dry the sewage sludge at the low temperature, thereby improving economic efficiency by utilizing the low-temperature waste heat and minimizing the occurrences of bad odors and wastewater treatment problems.
Description
Technical field
The present invention relates to following circulation of air flow type low temperature hot blast drying sludge and process equipment and processing method, namely, the air discharged from drying machine is made to circulate continuously through condensation process while utilizing the Cryogenic air being dried, the sewage sludge that produces being processed by lower water, carry out cold drying at industrial sludge produced by industry spot etc., thus make the problems such as generation stench and wastewater treatment minimize while utilizing low-temperature waste heat to improve economy.
Background technology
The downflow sludge that processed by lower water and produce and in the industrial production produced industrial sludge do not contain only a large amount of Organic substance producing stench, and owing to mud is made up of the material of high volatility, therefore, when mud is dried process, if raising baking temperature, then produce serious stench, thus there is many difficulties in mud is dried the process being used as the newly regenerated energy.
In order to solve the problems referred to above, it is provided with auxiliary equipment, the dry air burning that such as need to make final generation in incinerator or combustion furnace is made a return journey except lubricant component, or need to prevent facility from putting into the final dry air produced to remove stench etc. to biofilter and various stench, based on this, actually result in facility arrange input cost increase, facilities and equipment run subject many difficulties.
Especially, up to now, drying sludge process major part adopts by putting into heat and considering that temperature rises and evaporation latent heat, thus calculate the thermal efficiency and calculate the dry run (Heatenergyinputbasisdryingprocess) based on heat input that input heat is dried, owing to said process need to put into the heat of high temperature, therefore there is limitation in above-mentioned technology in solving the problem such as generation stench or Organic substance evaporation (Vaporizationofvolatileorganicmatter).
And, when putting into heat of high temperature and being dried, the steam produced in dry run can be recovered as condensed water (condensedwater), the steam of high temperature can with organic evaporation, therefore, the condensed water being condensed can produce the waste water (COD, BOD, T-N of high concentration) with high pollutional load degree, now, is necessarily required to the high pollution concentration wastewater treatment operation for processing above-mentioned waste water.
Therefore, drying process based on high temperature not only needs to arrange drying facility, but also need for build waste water treatment plant large-arealy, therefore, when considering the facility investment cost of drying equipment and operation cost and the waste water treatment plant's construction cost added and operation cost, the problem that a lot of economy aspect can be caused.
As the technology relevant to the drying method and device of mud, the applicant has applied for that first time is dry and second time is dry is shaped to granule afterwards the mud containing large quantity of moisture is carried out, and the heat of the granule through super-dry is used as " drying sludge processing method and device " (Korean granted patent publication the 10-0892649th, the patent documentation 1) of the drying source of mud and authorized.
But, above-mentioned technology has the structure utilizing boiler to be discharged to outside by filter to the thermal source that drying machine supplies.
Namely, as mentioned above, must be provided with auxiliary equipment, such as need to make the air burning through discharging after drying in incinerator or combustion furnace etc., or filter need to be put into and various stench prevents facility from removing the air etc. through discharging after drying, but existence can cause the problem that facility setup fee and input cost increase.
Especially, when cannot rapidly the industrial sludge including downflow sludge be processed, above-mentioned mud can rot, thus in the process that mud is dried, not only causing a large amount of stench, and moisture can be produced in putrefaction process, thus causing that moisture content increases, based on this, can increase for dry hot input amount, accordingly, there exist economy to be deteriorated, increase the vicious cycle continuously problem producing stench etc..
Finally, not yet develop the technology that the stench solving in stench, wastewater treatment, solution air-out produced by Organic substance in the process that mud is processed and economy etc. require up to now, therefore, the technology of the problems referred to above actually can be solved in the urgent need to exploitation.
Prior art literature
Patent documentation KR10-0892649 (2009.04.20)
Summary of the invention
The problem solved
nullThe circulation of air flow type low temperature hot blast drying sludge of the present invention processes equipment and processing method is used for solving the problems of the prior art as above，When mud is dried，Low temperature hot blast is used to be dried，Thus suppress the produced stench when mud being carried out high temperature drying，By preventing organic evaporation that the pollutional load degree of condensed water is greatly decreased，Thus not carrying out wastewater treatment operation，The low temperature hot blast required when mud is dried can be made to be circulated，Thus，Fundamentally prevent to outside drain low temperature hot blast，Can cool down the hot blast air containing moisture makes the temperature of the hot blast air containing moisture reach atmospheric temperature，Thus reducing the operation cost for operational outfit，And，The heat supply of atmosphere temperature rising required during for making to be dried by making steam or can be burned the multiple used heat of used heat etc. and carries out heat exchange and put into，Thus reduce dry heat Meteorological，And develop dried operation and the device that can carry out in real time processing，Thus effectively solving problem.
And, the moisture in operation (conditioningprocess) reduction mud rapidly can be regulated by the moisture coming the pulverized particles through super-dry as moisture adjuster to mix rapidly with mud, thus reduce water activity degree (wateractivity), suppress the enzyme decomposition based on microorganism, cause and only just can effectively process Organic substance in the organic decomposition of stopping, prevent organic rotten and preserve above-mentioned Organic substance, being dried, thus can increase, the degree being used as the high newly regenerated energy of energy content afterwards.
nullMore specifically，Complete to move into or the moisture content of sludge dewatering thing of dehydration is less than 10%，In mixing by pulverizing after the powder of the mud granule of super-dry，Moisture content is made to decline about 50%，Drying machine is put into after making granular sludge，Dry heat adopts except electricity、Compressed petroleum gas (LPG)、The used heat of the carried out heat exchange outside liquefied natural gas (LNG) or steam etc.，And make dry heat make relative humidity reach less than 60% in the way of temperature independent，The temperature of input air reaches 0 DEG C～120 DEG C，Moisture in the humid air discharged after being dried is by making atmospheric air、Subsoil water or the circulation of available water are condensed and are discharged，Discharge moisture air by can when by heat up make relative humidity be circulated in the way of putting into drying machine when reaching below 60%，Thus not only realizing processing in real time，And，Can make mud is carried out the condensed water that cold drying minimizes to make organic volatilization to discharge with the low stain degree of loading reaching to be made directly discharge degree，And do not produce stench completely，Thus producing the dried object meeting purpose.
The scheme of solution problem
In order to solve problem as above, the circulation of air flow type low temperature hot blast drying sludge of the present invention processes equipment and includes: sewage sludge storage groove 1, from a side inflow and store mud；Particle powder accumulator tank 2, from a side inflow the pulverized particles through super-dry saving as moisture adjuster；Mixer 3, it is connected with above-mentioned sewage sludge storage groove 1, mud is supplied to the inside of above-mentioned mixer 3, it is connected with above-mentioned particle powder accumulator tank 2, the pulverized particles through super-dry as moisture adjuster is flowed into, the moisture of the mud input by regulating by mixing sludge with through the pulverized particles of super-dry to above-mentioned mixer 3；Screen cloth screening plant 4, from the screening of the mixture of mixing above-mentioned mixer 3 segregating foreign objects；Compressing grains forming machine 5, receives the mixture of separating out foreign objects from above-mentioned screen cloth screening plant 4, makes the granule that mixture extrusion molding is prescribed level of above-mentioned separating out foreign objects；Drying machine 6, receive the granule of molding above-mentioned compressing grains forming machine 5 from side, receive the air of low temperature and low humidity degree from opposite side, the granule of molding is carried out low temperature and low humidity degree and dries, the temperature of the air of the low temperature and low humidity degree flowed into is 1 DEG C～120 DEG C, and relative humidity is 0～65%；Dry granule accumulator tank 7, is connected with above-mentioned drying machine 6, is stored in the drying machine 6 granule through super-dry；Two-way discharge machine 8, is connected with above-mentioned dry granule accumulator tank 7, the granule that two-way discharge dries；Dry granular mill 9, side is connected with above-mentioned two-way discharge machine 8, pulverizes the dry granule discharged the side from two-way discharge machine 8 and makes pulverized particles, and opposite side is connected with above-mentioned particle powder accumulator tank 2, supplies pulverized particles to particle powder accumulator tank 2；Cyclone portion 10, is connected with above-mentioned drying machine, is used for the dust removing in the air of dryer inner；Condensate moisture device 11, side is connected with above-mentioned cyclone portion 10 by pipeline, removes via the dampness in the air in cyclone portion 10, and opposite side is connected with above-mentioned drying machine 6 by pipeline, removes the air of dampness to drying machine 6 supply；Water condensate storage groove 12, is connected with above-mentioned condensate moisture device 11 by pipeline, the moisture condensed for being stored in above-mentioned condensate moisture device 11；And heating plant 13, be connected with the pipeline between above-mentioned condensate moisture device 11 and drying machine 6, to drying machine 6 supplying temperature be 1 DEG C～120 DEG C, relative humidity be the air of 0～65%.
Now, it is a feature of the present invention that above-mentioned sewage sludge storage groove 1 and particle powder accumulator tank 2 are connected with instrument 16 respectively, to regulate the ratio of the raw material to mixer 3 supply.
Further, it is a feature of the present invention that above-mentioned heating plant 13 includes the heat exchanger being connected by the used heat discharger 22 of pipeline with the outside for producing used heat.
Further, it is a feature of the present invention that the discharge side of above-mentioned water condensate storage groove 12 is connected by pipeline with the supply side of condensate moisture device 11, so that the moisture of condensation is used as the cooling water of above-mentioned condensate moisture device 11 in above-mentioned condensate moisture device 11.
And, the circulation of air flow type low temperature hot blast drying sludge processing method of the present invention includes: the initial stage processes step, utilize above-mentioned sludge drying processing device, save as the mud of main material at sewage sludge storage groove, save as the pulverized particles through super-dry of moisture adjuster at particle powder accumulator tank 2；Blend step, puts into mud and the pulverized particles through super-dry so that the moisture content of mixture reaches 45～60% to above-mentioned mixer 3；Screening step, supplies mixture to above-mentioned screen cloth screening plant 4, thus screening and separate the foreign body comprised in the mixture；Compression forming step, supplies the mixture via above-mentioned screen cloth screening plant 4 separating out foreign objects to above-mentioned compressing grains forming machine 5, makes the granule that mixture extrusion molding is prescribed level of above-mentioned separating out foreign objects；Drying steps, it is dropped in the granule that above-mentioned compressing grains forming machine 5 makes to above-mentioned drying machine 6, the air discharged from above-mentioned heating plant 13 or above-mentioned condensate moisture device 11 is supplied to above-mentioned drying machine 6, make the scope that the temperature to the air of the internal supply of above-mentioned drying machine 6 maintains 1 DEG C～120 DEG C, relative humidity maintains the scope of 0～65% so that the moisture content of granule reaches 0～10%；Storing step, is stored in the above-mentioned drying machine 6 granule through super-dry at dry granule accumulator tank 7；Dry granule pulverising step, supplies a part by above-mentioned two-way discharge machine 8 to dry granular mill 9 and dries granule and make pulverized particles by pulverizing, supply above-mentioned pulverized particles to above-mentioned particle powder accumulator tank 2；Dust removal step, supplies the air discharged after granule being dried inside above-mentioned drying machine 6 to above-mentioned cyclone portion 10, thus the dust removed in air；Moisture removal step, utilizes above-mentioned condensate moisture device 11 to remove the dampness in the air via cyclone portion 10；And dry air supplying step, heating plant 13 is utilized to supply the used heat of outside to drying machine 6 or carry out the air of heat exchange with outside used heat, the temperature of the air supplied is 1 DEG C～120 DEG C, relative humidity is 0～65%, make the air discharged from condensate moisture device 11 carry out heat exchange with outside used heat, thus to drying machine 6 supplying temperature be 1 DEG C～120 DEG C, relative humidity be the air of 0～65%.
The effect of invention
According to the present invention, carry out with the mode to ocean waste sludge processing or by compared with filling the negative means that mud is processed, the policy completely forbidden to ocean waste sludge can be responded actively, especially, according to mud generation amount, for the place of business producing low-temperature waste heat, very big difficulty is subject in drying sludge process, but when adopt the present invention, can very economical, effectively mud is processed, thus Treatment of Sludge cost minimization can be made.
Especially, the moisture content that can make dried object reaches less than 10%, thus, mud can be dried to external sales by low heat valve (energy content), by dry air circulation of air flow mode mud can be dried be fully solved owing to producing because storage area is not enough problem, be difficult to process and produce stench etc. because producing to rot and the inconvenience that cannot process, and it is dry to carry out low temperature (0 DEG C～120 DEG C), thus can use the used heat of low temperature, thus the economy that is greatly improved.
Especially, mud is carried out cold drying, thus can prevent organic volatilization, because the pollutional load degree of condensed water is extremely low, thus can be easy to solve waste water handling problem.
Accompanying drawing explanation
Fig. 1 illustrates the structure chart that the circulation of air flow type low temperature hot blast drying sludge of the present invention processes equipment.
Fig. 2 is the structure chart of the circulation of air flow type low temperature hot blast drying sludge processing method illustrating the present invention.
Fig. 3 is the structure chart of the embodiment illustrating the heating plant in the present invention.
Description of symbols
1: sewage sludge storage groove
2: particle powder accumulator tank
3: mixer
4: screen cloth screening plant
5: compressing grains forming machine
6: drying machine
7: dry granule accumulator tank
8: two-way discharge machine
9: dry granular mill
10: cyclone portion
11: condensate moisture device
12: water condensate storage groove
13: heating plant
13a: the first heat exchanger
13b: the second heat exchanger
14: transfer device
15: bucket elevator
16: instrument
17: the first two-way discharge machines
18: the second two-way discharge machines
19: aerator
20: excavationg pump
21: valve
22: used heat discharger
Detailed description of the invention
Mud is the complex of Organic substance and the inorganic matter produced in lower water or wastewater treatment operation, even if the volume and weight being made mud by dehydration procedure is reduced, but still possess the moisture content being about about 78～83 percentage by weights, and it is perishable and produce serious stench, and, not only it is difficult to mud is processed, and in withering situation, mass energy expense need to be expended.
Further, the common drying process developed at present uses the heat of high temperature of 180 DEG C to 850 DEG C, causes promoting organic volatilization and producing extremely serious stench, and the auxiliary equipment for solving stench arranges investment cost and maintenance management expense in the trend increased.
In the present invention, consider the many difficulties encountered in the process that mud is processed because of physicochemical characteristic as above, employing can fundamentally prevent that the measure of high economy and stench carrys out lignin-sludge, by air natural conditions and the used heat discharged with low temperature can be used or uses and relative humidity can be reduced to the thermal source of less than 65% mud is dried, thus economy can be made to maximize.
First, illustrate that the circulation of air flow type low temperature hot blast of the present invention pollutes equipment for drying.
The circulation of air flow type low temperature hot blast of the present invention pollutes equipment for drying and generallys include sewage sludge storage groove 1, particle powder accumulator tank 2, mixer 3, screen cloth screening plant 4, compressing grains forming machine 5, drying machine 6, dry granule accumulator tank 7, two-way discharge machine 8, dry granular mill 9, cyclone portion 10, condensate moisture device 11, water condensate storage groove 12 and heating plant 13.
And, between each structural element, especially, the transfer device 14 of transfer conveyer, conveying worm etc. it is provided with in the path of transfer liquid phase or the object of solid phase, between each structure, thus transfer raw material, bucket elevator 15 is set in the part that there is High variation.
Further, for dry air, used heat, dried air mobile route, each structural element is connected by pipeline.
As in the sewage sludge storage tank 1 of present configuration key element, mud flows into and is stored in sewage sludge storage tank 1 externally to the inside of sewage sludge storage tank 1, is provided with the transfer device 14 for the conveying worm etc. to outside discharge mud in the way of connection in the bottom of sewage sludge storage tank 1.
As mentioned above, the mud being stored in sewage sludge storage groove 1 is the Organic substance and mineral complex that produce in lower water or wastewater treatment operation, even if the volume and weight being made mud by dehydration procedure is reduced, but still it is about the moisture content about 78～83 percentage by weights.
In the particle powder accumulator tank 2 of the structural element as the present invention, from the side inflow of particle powder accumulator tank 2 pulverized particles through super-dry as moisture adjuster and be stored in particle powder accumulator tank 2, the bottom of particle powder accumulator tank 2 is connected with the transfer device 14 of conveying worm etc., thus moisture adjuster can be discharged.
Being stored in the moisture adjuster of particle powder accumulator tank 2 is the pulverized particles through super-dry crushed in dry granular mill 9.
Now, by the pulverized particles through super-dry with becoming moisture adjuster in continuous circulating process, when equipment starts in the early stage, it is not fed past the pulverized particles that dries or is that 10 percentage by weight particles below start by additionally supplying moisture content.
As shown in Figure 1, mixer 3 as present configuration key element is connected with above-mentioned sewage sludge storage groove 1 by transfer device 14, mud is supplied to the inside of mixer 3 with this, above-mentioned mixer 3 is also connected with above-mentioned particle powder accumulator tank 2 by transfer device 14, the pulverized particles through super-dry as moisture adjuster is flowed into mixer 3, thereby through mixing sludge and the moisture regulating input mud through the pulverized particles of super-dry using this.
Now, it is preferable that make the final moisture content of mixture reach 45～60 percentage by weights.
Like this, it is preferable that as it can be seen, the method for the final moisture content that measures mixture is as follows, sewage sludge storage groove 1 and particle powder accumulator tank 2 are connected with instrument 16 respectively, thus the ratio of raw material that supplies to mixer 3 of scalable.
Now, in order to supply the mud of ormal weight, it is possible to use single-screw (single screw) pump.
As it can be seen, be provided with the transfer device 14 of conveying worm etc. in the way of connection in the bottom of above-mentioned mixer 3, thus supplying mixture to screen cloth screening plant 4.
As, in the screen cloth screening plant 4 of present configuration key element, when comprising foreign body in input mixture, being difficult in the compressing grains forming machine 5 arranged later and be shaped to granule, therefore remove foreign body by screen cloth.
Preferably, the preferred embodiment of screen cloth is that the particle that the size of sieve mesh reaches not make diameter be more than 5mm passes through.
The foreign body of the screen cloth not passing through screen cloth screening plant 4 is discharged, as it can be seen, move and be stored in mixture accumulator tank 16 by the mixture of screen cloth to mixture accumulator tank 16 to outside.
And, mixture accumulator tank 16 is provided with the transfer device 14 of conveying worm etc. in the way of connection, thus mixture can be transferred to compressing grains forming machine 5.
Now, as shown in the figure, first two-way discharge machine 17 can be set between screen cloth screening plant 4 and mixture accumulator tank 16, thus optionally classification individually is stored the mixture of other process pending for the mixture of grain forming with when not past grain forming.
Compressing grains forming machine 5 as the structural element of the present invention directly makes the granule that mixture extrusion molding is prescribed level of separating out foreign objects in above-mentioned screen cloth screening plant 4, or is received the granule that mixture extrusion molding is prescribed level of separating out foreign objects by mixture accumulator tank 16.
Compressing grains forming machine 5 includes hopper and forming machine, and above-mentioned hopper is used for storing mixture, and above-mentioned forming machine is connected with above-mentioned hopper and for making mixture extrusion molding.
Above-mentioned compressing grains forming machine 5 can be made up of known multiple compressing grains forming machine.
The granule made by extrusion molding process is in the state that moisture content is 45～60 percentage by weights.
Now, in order to again process or discharge unrealized grain forming or the bad article shaped of the suitable condition of molding of not met, as shown in the figure, discharge side at compressing grains forming machine 5 arranges the second two-way discharge and 18, thus the granule of molding can have been selectively supplied to drying machine 6, and can discharge or again put into incomplete article shaped to hopper.
Preferably, the diameter of suitably shaped granule is 6～12mm.
As it can be seen, as in the drying machine 6 of present configuration key element, receiving the granule of molding above-mentioned compressing grains forming machine 5 from side, receiving low temperature and low humidity degree air from opposite side, dry thus the granule of molding is carried out low temperature and low humidity degree.
Now, it is preferable that drying machine 6 is the Mixed-fluid dryer (Mixedflowdryer) of Low Temperature Thermal wind investing method.
Thus, preferably, bucket elevator 15 is set between compressing grains forming machine 5 and drying machine 6, the granule thus making molding flows into drying machine 6 top, complete the granule of dried after discharging from drying machine 6 bottom, transfer and be stored in dry granule accumulator tank 7 by the transfer device 14 of conveying worm etc. to follow-up dry granule accumulator tank 7.
On the other hand, it is preferable that the temperature to the internal low temperature and low humidity degree air flowed into of drying machine 6 is 1 DEG C～120 DEG C, relative humidity is 0～65%, the moisture content by the dry granule of above-mentioned drying machine 6 is below 10 percentage by weights.
Now, the air that the dry granule discharged from drying machine 6 bottom is cooled down can be put into drying machine hot blast input port again, thus re-using heat or for regulating temperature and humidity.
And, preferably, in drying machine 6, in order to the uniform moisture in induced mixture evaporate and the cooling of inducing moisture to evaporate and regulate input air capacity, and adjust the heat extraction changing airduct, thus can discharge the air of ormal weight, thus utilizing the convection current of produced air in dry run and mechanics principle to make moisture evaporation effect maximize.
And, it is preferable that in Mixed-fluid dryer 6, wrap dampish air to discharge in time respectively through the discharge pipe being formed at drying machine 6 side, thus increase drying efficiency further, and dried object can be made to decline successively and be dried, can be easy to discharge the dried object being dried.
As it can be seen, the dry granule accumulator tank 7 as present configuration key element is stored in drying machine 6, by transfer device 14, the granule being dried.
Two-way discharge machine 8 as present configuration key element is connected with above-mentioned dry granule accumulator tank 7, thus the granule through super-dry is discharged on two-way choice ground.
The a part of granule optionally discharged is after super-dry granular mill 9 is crushed, and supplies to above-mentioned particle powder accumulator tank 2 as moisture adjuster, and the dry granule of residue is individually stored after being discharged, thus being used as the newly regenerated energy etc..
As shown in the figure, as in the dry granular mill 9 of present configuration key element, side is connected with above-mentioned two-way discharge and 8, pulverize the dry granule discharged the side from two-way discharge machine 8 and make pulverized particles, opposite side is connected with above-mentioned particle powder accumulator tank 2, supplies pulverized particles to particle powder accumulator tank 2.
As it can be seen, the cyclone portion 10 as present configuration key element is connected with above-mentioned drying machine 6 by pipeline, above-mentioned cyclone portion 10 is used for the dust removing in the air of dryer inner.
That is, cyclone portion 10 for remove put into drying machine 6 and the granule within drying machine 6 be dried after dust in the air discharged with the state containing moisture and dust etc..
Now, in order to be smoothly discharged air, aerator 19 or suction pump etc. can be set between cyclone portion 10 and drying machine 6.
As in the condensate moisture device 11 of present configuration key element, side is connected with cyclone portion 10 by pipeline, removes via the dampness in the air in cyclone portion 10, and opposite side is connected with above-mentioned drying machine by pipeline, removes the air of dampness to drying machine 6 supply.
As it can be seen, the water condensate storage groove 12 of the present invention is connected with above-mentioned condensate moisture device 11 by pipeline, for being stored in the moisture of above-mentioned condensate moisture device 11 condensation and utilizing excavationg pump 20 to discharge moisture.
As it can be seen, the heating plant 13 as present configuration key element is connected with the pipeline between above-mentioned condensate moisture device 11 and drying machine 6, and to drying machine 6 supplying temperature be 1 DEG C～120 DEG C, relative humidity be the air of 1～65%.
Now, when heating plant 13 supplies the outside used heat of high temperature, supplying after said external used heat being transformed into low temperature in the way of reaching said temperature and humidity, heating plant 13 forms the structure of the outside used heat that can directly feed low temperature.
Especially, be again fed through the air that condensate moisture device 11 is discharged available outside used heat to drying machine 6, to drying machine 6 supplying temperature be 1 DEG C～120 DEG C, relative humidity be the air of 1～65%.
Preferably, in a preferred embodiment, the heat exchanger that heating plant 13 is connected by the used heat discharger 22 by pipeline with generation and the outside discharging used heat is formed.
Namely, the discharge used heat (steam or air) making the used heat discharger 22 of outside flows into heating plant 13, and make discharge used heat in the inner loop of heating plant 13 and flow out, make the pipeline moved from condensate moisture device 11 to drying machine 6 in the inner loop of heating plant 13 and walk out simultaneously, thus between two pipelines, realize heat exchange so that the temperature of the air moved to drying machine 6 reach 1 DEG C～120 DEG C, relative humidity arrive 1～65%.
And, in the early stage in drying steps, because being difficult to flow into air in condensate moisture device 11, therefore the pipeline for making extraneous air flow into is formed in the side of condensate moisture device 11, after the discharge used heat making extraneous air and outside used heat discharger 22 carries out heat exchange, extraneous air is made to flow into drying machine 6, in operation later, utilize a valve to block extraneous air stream, make the air-out of condensate moisture device 11 and the discharge used heat of outside used heat generator carry out heat exchange.
As described in Figure 3, as an example of preferred structure as above, heating plant 13 can be made up of the first heat exchanger 13a being connected with used heat discharger 22 by pipeline and the second heat exchanger 13b.
Namely, the pipeline of used heat discharger 22 forms Liang Ge branch, it is respectively provided with valve 21 in the position diverged to, or diverging to position, check-valves is set, thus optionally supplying used heat to the first heat exchanger 13a and the second heat exchanger 13b, and, the side of the first heat exchanger 13a is connected with above-mentioned drying machine 6 by pipeline, extraneous air is from a side inflow of the first heat exchanger 13a and supplies heat to drying machine 6, and, the side of the second heat exchanger 13b is connected with drying machine 6 by pipeline, the opposite side of the second heat exchanger 13b is connected with condensate moisture device 11 by pipeline, also valve 21 can be set in the position of collecting of pipeline.
In the early stage in step, this structure makes the discharge used heat of extraneous air and used heat generator 20 carry out heat exchange and supply to drying machine 6, afterwards, makes the air-out of condensate moisture device 11 and the discharge used heat of used heat discharger 22 carry out heat exchange and circulate successively.
Preferably, this heating plant 13 supplies the device of dry heat for wet granule is dried, multiple used heat (low temperature or high temperature), steam, LNC etc. can be used as dry heat, heating plant 13 is adjusted to the air that the temperature maintenance less than 120 DEG C of the air put into drying machine 6 side, relative humidity can be made to maintain 65% to drying machine 6 supplying temperature, thus preventing Organic substance from evaporating.
For heat supply in the early stage, heating plant 13 can be made up of the heater of various boilers etc., but in contrast, it is preferable that heating plant 13 is made up of above-mentioned heat-exchange device.
And, in said structure, the discharge side of above-mentioned water condensate storage groove 12 is connected by pipeline with the supply side of condensate moisture device 11, thus the moisture of condensation in above-mentioned condensate moisture device 11 can be used as the cooling water of above-mentioned condensate moisture device 11.
More specifically, in order to be cooled in condensate moisture device 11 cold-producing medium used, utilize heat exchanger that the moisture being condensed discharged from water condensate storage groove 12 on the pipeline of cold-producing medium is cooled down, thus can further improve energy efficiency.
Hereinafter, the drying sludge processing method utilizing circulation of air flow type low temperature hot blast drying sludge as above to process equipment is described in detail.
1. the initial stage processes step
Save as the mud of main material at sewage sludge storage groove 1, save as the pulverized particles of moisture adjuster at particle powder accumulator tank 2.
2. blend step
Mud is put into and through the pulverized particles of super-dry and mix to above-mentioned mixer 3.
Now, utilize instrument 16 to measure the raw material moved from sewage sludge storage groove 1 and particle powder accumulator tank 2 to mixer 3 and the moisture content making mixture reaches 45～60%.
Certainly, for the mud for specified rate, single-screw (single screw) pump can be used.
Transfer device 14 is utilized to supply the mixture of mixing to screen cloth screening plant 4.
3. screening step
Supplying mixture to above-mentioned screen cloth screening plant 4, screening also separates the foreign body comprised in the mixture.
In order to carry out extrusion molding, do not passed through the mixture of screen cloth to compressing grains forming machine 5 transfer by transfer device 14.
Now, it is possible to transfer after the mixture by screen cloth screening plant 4 is stored in mixture accumulator tank 16 temporarily.
Preferably, by the diameter of the mixture of screen cloth less than 5mm.
4. extrusion molding step
The mixture of above-mentioned screen cloth screening plant 4 separating out foreign objects it is fed through to above-mentioned compressing grains forming machine 5, so that the granule that mixture extrusion molding is prescribed level of separating out foreign objects.
Now, the diameter of granule is 6～12mm, length is 20～60mm.
Bad article shaped that is unformed or that be unsatisfactory for suitable condition of molding is discharged by the second two-way discharge machine 18.
In order to make the extrusion molding granule discharged move to drying machine 6, transfer above-mentioned granule to bucket elevator 15.
5. drying steps
It is dropped in the granule that above-mentioned compressing grains forming machine 5 makes to above-mentioned drying machine 6, the air discharged from above-mentioned heating plant 13 or above-mentioned condensate moisture device 11 is supplied to above-mentioned drying machine 6, make the scope that the temperature to the air of the internal supply of drying machine 6 maintains 1 DEG C～120 DEG C, relative humidity maintains the scope of 0～65% so that the moisture content of granule reaches 0～10%.
Characteristic according to dry air, drying time is 2～24 hours, and has discharged the dry granule dried to drying machine 6 bottom.
6. storing step
Utilize the transfer device 14 of conveying worm etc., be stored in the above-mentioned drying machine 6 granule through super-dry at dry granule accumulator tank 7.
7. dry granule pulverising step
Supply a part by above-mentioned two-way discharge machine 8 to dry granular mill 9 dry granule and make pulverized particles by pulverizing, supply the pulverized particles for extrusion molding as moisture adjuster to above-mentioned particle powder accumulator tank 2, and discharge the dry granule of residue to be used as the extra renewable sources of energy etc..
8. dust removal step
The air discharged after granule being dried inside above-mentioned drying machine 6 is supplied to above-mentioned cyclone portion 10, thus the dust removed in air.
9. moisture removal step
Above-mentioned condensate moisture device 11 is utilized to remove the dampness in the air via cyclone portion 10.
Namely, in order to remove the dampness in the air being included in the process that the granule to above-mentioned extrusion molding is dried the dampness being discharged, put into above-mentioned air to condensate moisture device 11 and remove dampness, now, first humid air is made to make a return journey chalk dust removing via cyclone portion 10, bypass air through condensate moisture device 11 to make a return journey moisture removal, the moisture that is condensed to water condensate storage groove 12 transfer and by excavationg pump 20 to outside discharge.
10. dry air supplying step
Heating plant 13 is utilized to supply the used heat of outside to drying machine 6 or carry out the air of heat exchange with outside used heat, the air themperature supplied is 1 DEG C～120 DEG C, relative humidity is 0～65%, make the air discharged from condensate moisture device 11 carry out heat exchange with outside used heat, thus to drying machine 6 supplying temperature be 1 DEG C～120 DEG C, relative humidity be the air of 0～65%.
It is dried after the granule that above-mentioned compressing grains forming machine 5 is discharged to put into drying machine 6, dry low temperature hot blast air need to be supplied, now, as mentioned above, heating plant 13 supplies the device of dry heat for wet granule is dried, multiple used heat (low temperature or high temperature), steam, liquefied natural gas etc. are used as dry heat, it is reduced to drying machine 6 internal inflow temperature and Organic substance will not be made to evaporate and make relative humidity maintain the air of less than 65%, now, aerator is utilized to put into dry air.
But, preferably, when dry heat is used heat and steam, use heat exchanger only to put into air, when dry heat is liquefied natural gas, compressed petroleum gas and electric heating machine, directly extraneous air is used as dry heat and puts into, baking temperature difficult so that Organic substance evaporation less than 120 DEG C, relative humidity is less than 65%, and, the temperature for maintaining above-mentioned condition can be automatically adjusted.
Namely, in dry air supplying step, in the early stage, directly supply the used heat of outside to drying machine 6 or supply extraneous air by heat change method to drying machine 6, afterwards, the used heat and the air discharged from condensate moisture device 11 that make outside carry out heat exchange, again make atmosphere temperature rising with this or make air be cooled to proper temperature, thus continuing to supply to drying machine 6.
The present invention as above has by condensing through the dried humid air discharged, make except the condensed water discharged to outside, again put into the circulation of air flow type structure being dried required air to drying machine by inner loop, the temperature making input air maintains less than 120 DEG C, relative humidity maintains less than 65%, drying time there are differences according to the characteristic putting into air, but carries out 2～24 hours dry.
And, the moisture content of the mixture mixed to carry out extrusion molding is 45～60 percentage by weights, the moisture content of dry granule is below 10 percentage by weights, in the case, when said mixture is used as newly regenerated energy fuel, low heat valve can be made to maximize, and execution can be made to minimize for the effect of the moisture adjuster of the moisture of conditioning of mud and the amount of dry particle powder put into carry out extrusion molding.
Drying mode and high temperature drying mode to the present invention formed with structure as above compare, and comparative result is shown in table 1 below.
Table 1
(+more increase, stench produces degree and condensed water colourity is high, and it is the result that 10 adults randomly drawed are investigated that stench produces degree)
Table one is compare in the process that mud is dried, adopt high-temperature hot to dry the principle of (Caloriebasedrying) and spontaneous combustion, and (humidity is balanced: low-temperature airflow formula EquilibriumMoistureContent) being dried dries the result presented by the movement promoting material.
Especially, compared with heated drying mode, the baking temperature of the present invention can be dried when extremely low about 60 DEG C, and presents the result that can use low-temperature waste heat, owing to being dried at low temperatures, thus, compared with heated drying, the level producing stench is non-normally low, this means when using low temperature, the evaporation that can make organic substance minimizes, and can be used in the cost minimization processing stench, thus high economy can be presented.
And then, according to table 2, compared with the condensed water obtained by heated drying, by making the minimizing degree of the pollutional load degree of condensed water that wet air condensation measures reach the degree being enough to directly discharge, to produce the result of degree consistent with being greatly reduced stench because organic evaporation minimizes for the above results.
And, the present invention has and does not discharge to outside for the air being dried and recycle the feature that can fundamentally prevent from discharging to outside stench for the air that is dried, thus can largely reduce the setting of Deodor facility, thus largely improving economy.
Table 2
Industrial applicability
The industrial field of the applicable present invention is use mud can produce the livestock products fecaluria drying sludge process of the newly regenerated energy, the process of slaughtering wastewater drying sludge, food company (oil processing company etc.) drying sludge process, food garbage wastewater sludge dried and excess sludge dried etc. discharge the industry mechanism of a large amount of organic principles, and the present invention is widely used in paper mill sludge.
Claims (5)
1. a circulation of air flow type low temperature hot blast drying sludge processes equipment, it is characterised in that including:
Sewage sludge storage groove (1), from a side inflow and store mud；
Particle powder accumulator tank (2), from a side inflow the pulverized particles through super-dry saving as moisture adjuster；
Mixer (3), it is connected with above-mentioned sewage sludge storage groove (1), mud is supplied to the inside of above-mentioned mixer (3), it is connected with above-mentioned particle powder accumulator tank (2), the pulverized particles through super-dry as moisture adjuster is flowed into, the moisture of the mud input by regulating by mixing sludge with through the pulverized particles of super-dry to above-mentioned mixer (3)；
Screen cloth screening plant (4), from the screening of the mixture of mixing above-mentioned mixer (3) segregating foreign objects；
Compressing grains forming machine (5), receives the mixture of separating out foreign objects, makes the granule that mixture extrusion molding is prescribed level of above-mentioned separating out foreign objects from above-mentioned screen cloth screening plant (4)；
Drying machine (6), the granule of molding above-mentioned compressing grains forming machine (5) is received from side, the air of low temperature and low humidity degree is received from opposite side, the granule of molding is carried out low temperature and low humidity degree dry, the temperature of the air of the low temperature and low humidity degree flowed into is 1 DEG C～120 DEG C, and relative humidity is 0～65%；
Dry granule accumulator tank (7), is connected with above-mentioned drying machine (6), is stored in the drying machine (6) granule through super-dry；
Two-way discharge machine (8), is connected with above-mentioned dry granule accumulator tank (7), the granule that two-way discharge dries；
Dry granular mill (9), side is connected with above-mentioned two-way discharge machine (8), pulverize the dry granule discharged the side from two-way discharge machine (8) and make pulverized particles, opposite side is connected with above-mentioned particle powder accumulator tank (2), supplies pulverized particles to particle powder accumulator tank (2)；
Cyclone portion (10), is connected with above-mentioned drying machine, is used for the dust removing in the air of dryer inner；
Condensate moisture device (11), side is connected with above-mentioned cyclone portion (10) by pipeline, remove via the dampness in the air of cyclone portion (10), opposite side is connected with above-mentioned drying machine (6) by pipeline, removes the air of dampness to drying machine (6) supply；
Water condensate storage groove (12), is connected with above-mentioned condensate moisture device (11) by pipeline, is used for being stored in the moisture of condensation in above-mentioned condensate moisture device (11)；And
Heating plant (13), is connected with the pipeline between above-mentioned condensate moisture device (11) and drying machine (6), to drying machine (6) supplying temperature be 1 DEG C～120 DEG C, relative humidity be the air of 0～65%.
2. circulation of air flow type low temperature hot blast drying sludge according to claim 1 processes equipment, it is characterized in that, above-mentioned sewage sludge storage groove (1) and particle powder accumulator tank (2) are connected with instrument (16) respectively, to regulate the ratio of the raw material supplied to mixer (3).
3. circulation of air flow type low temperature hot blast drying sludge according to claim 2 processes equipment, it is characterized in that, above-mentioned heating plant (13) includes the heat exchanger being connected by pipeline with the used heat discharger (22) of the outside for producing used heat.
4. circulation of air flow type low temperature hot blast drying sludge according to claim 3 processes equipment, it is characterized in that, the discharge side of above-mentioned water condensate storage groove (12) is connected by pipeline with the supply side of condensate moisture device (11), so that the moisture of condensation is used as the cooling water of above-mentioned condensate moisture device (11) in above-mentioned condensate moisture device (11).
5. a circulation of air flow type low temperature hot blast drying sludge processing method, it is characterised in that including:
Initial stage processes step, utilize one in claim 1 to 4 described circulation of air flow type low temperature hot blast sludge drying processing device, save as the mud of main material at sewage sludge storage groove, save as the pulverized particles through super-dry of moisture adjuster at particle powder accumulator tank (2)；
Blend step, puts into mud and the pulverized particles through super-dry so that the moisture content of mixture reaches 45～60% to above-mentioned mixer (3)；
Screening step, supplies mixture to above-mentioned screen cloth screening plant (4), thus screening and separate the foreign body comprised in the mixture；
Compression forming step, to the supply of above-mentioned compressing grains forming machine (5) via the mixture of above-mentioned screen cloth screening plant (4) separating out foreign objects, makes the granule that mixture extrusion molding is prescribed level of above-mentioned separating out foreign objects；
Drying steps, it is dropped in the granule that above-mentioned compressing grains forming machine (5) makes to above-mentioned drying machine (6), the air discharged from above-mentioned heating plant (13) or above-mentioned condensate moisture device (11) is supplied to above-mentioned drying machine (6), make the scope that the temperature to the air of the internal supply of above-mentioned drying machine (6) maintains 1 DEG C～120 DEG C, relative humidity maintains the scope of 0～65% so that the moisture content of granule reaches 0～10%；
Storing step, is stored in the above-mentioned drying machine (6) granule through super-dry dry granule accumulator tank (7)；
Dry granule pulverising step, to dry granular mill (9) the dry granule of a supply part and make pulverized particles by pulverizing by above-mentioned two-way discharge machine (8), supply above-mentioned pulverized particles to above-mentioned particle powder accumulator tank (2)；
Dust removal step, to the air that the supply of above-mentioned cyclone portion (10) is discharged after granule is dried by above-mentioned drying machine (6) inside, thus the dust removed in air；
Moisture removal step, utilizes above-mentioned condensate moisture device (11) to remove via the dampness in the air of cyclone portion (10)；And
Dry air supplying step, heating plant (13) is utilized to the used heat outside drying machine (6) supply or to carry out the air of heat exchange with outside used heat, the temperature of the air supplied is 1 DEG C～120 DEG C, relative humidity is 0～65%, make the air discharged from condensate moisture device (11) carry out heat exchange with outside used heat, thus to drying machine (6) supplying temperature be 1 DEG C～120 DEG C, relative humidity be the air of 0～65%.
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| KR10-2013-0135479 | 2013-11-08 | ||
| KR1020130135479A KR101338369B1 (en) | 2013-11-08 | 2013-11-08 | Equipment and method for renewable energy production process by continuous air circulation drying process without emission |
| PCT/KR2014/010318 WO2015068984A1 (en) | 2013-11-08 | 2014-10-31 | Air current circulation type low-temperature hot-air sludge drying equipment and processing method |
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| KR (1) | KR101338369B1 (en) |
| CN (1) | CN105745175A (en) |
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| CN108726834A (en) * | 2017-04-14 | 2018-11-02 | 中国科学院生态环境研究中心 | The biological dewatered reaction unit of forced ventilation level stream and method |
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| KR101697525B1 (en) * | 2016-01-27 | 2017-01-18 | 주식회사 기수정밀 | A drying treatment method for organic sludge and the apparatus therefor |
| KR101817647B1 (en) * | 2017-07-18 | 2018-02-21 | 주식회사 아쿠엑스 코리아 | Equipment for Zero-Discharge Treatment of Livestock Wastewater |
| CN107382016B (en) * | 2017-09-01 | 2023-08-18 | 浙江海河环境科技有限公司 | Low-temperature closed-loop sludge drying system |
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| WO2015068984A1 (en) | 2015-05-14 |
| KR101338369B1 (en) | 2013-12-06 |
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