CN105819665A - Sludge drying system and sludge drying method - Google Patents
Sludge drying system and sludge drying method Download PDFInfo
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- CN105819665A CN105819665A CN201510025421.4A CN201510025421A CN105819665A CN 105819665 A CN105819665 A CN 105819665A CN 201510025421 A CN201510025421 A CN 201510025421A CN 105819665 A CN105819665 A CN 105819665A
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- mud
- hothouse
- drying chamber
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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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- 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
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a sludge drying system. The sludge drying system comprises a conveying apparatus used for receiving and conveying sludge to a drying apparatus at downstream; the drying apparatus comprises a casing, wherein, a splitter plate is arranged in the casing, so that the space in the casing is divided into a first drying chamber and a second drying chamber. A communication port is formed on the splitter plate and used for communicating the first drying chamber with the second drying chamber. A feed inlet and an air outlet are arranged on the upper part of the first drying chamber, and a discharge hatch is arranged on the circumferential wall of the first drying chamber. An air inlet is arranged on the circumferential wall of the second drying chamber. A stirring apparatus is arranged in the first drying chamber, wherein, the stirring apparatus comprises a rotation shaft and a stirring component fixed on the rotation shaft, and the stirring component is used for scraping the sludge near the communication port. An air blast apparatus is capable of communicating with the second drying chamber when passes through the air inlet. The invention also provides a sludge drying method by using the sludge drying system.
Description
Technical field
The present invention relates to sludge drying field, in particular to a kind of sludge drying system, it is used for being dried the mud of moisture content about 70-85%, a kind of thus obtain moisture content mud below 40%, and method utilizing this sludge drying system to carry out sludge drying.
Background technology
In modern city, the process of sewage is requisite, and along with the substantial amounts of mud of generation is comprehended at the place of sewage.At present, sewage treatment plant typically uses the method concentrated or be dehydrated that mud is carried out early stage process, in order to from more than 90%, the moisture content of mud is reduced to 70-85%, fills processed mud afterwards, solidify or drying and other treatment.Landfill easily makes sludge fermentation the problem of secondary pollution environment occur, and existing solidification or drying equipment usual mummification efficiency is low and energy resource consumption is big, all it is difficult to while reducing moisture percentage in sewage sludge also to process substantial amounts of mud.
Chinese invention patent (CN101186422A) proposes a kind of enclosed multi-chamber fluidized bed drying method for sludge.Fluid bed employed in this method not only consumes the energy and efficiency is the lowest, it is difficult to realizes continuous and large-scale sludge drying and processes.
Chinese utility model patent (CN203319838U) proposes a kind of sludge solidification processing agitator.Mud is mixed the solidification realizing mud by this blender by stirring with additive, and this process does not the most remove the moisture in mud, also add the volume of mud, and causes the mud after solidification to be utilized again.
Owing to the mud of moisture content about 70-85% has viscosity conglomeration strong, easy, difficult broken characteristic, existing sludge drying device is difficult to the moisture content this kind of mud carrying out large-scale drying and other treatment to reduce mud, and the early stage not having a kind of equipment or system can either implement mud processes and it can be carried out drying and other treatment again.Therefore, need to provide such a sludge drying system and method, enforcement sludge handling process and drying process can be combined by this system and method, thus the mud of the about 70-85% of the moisture content from sewage treatment plant is converted into moisture content mud below 40%.
Summary of the invention
For defect present in prior art, the present invention proposes a kind of sludge drying system and the method utilizing this system to carry out sludge drying, the moisture content of the mud from sewage treatment plant directly can be reduced to less than 40% from about 70-85%, thus improve the mummification efficiency of mud.
The sludge drying system of the present invention includes conveyer device, desiccation apparatus and air-blast device; and semi-solid mud can be changed to powderization, such that it is able to make the mud after mummification will not cause secondary pollution after landfill because of water logging from agglomerate or block by these devices.
The sludge drying system of the present invention can include adjusting material feeder unit or modifying device so that mud in desiccation apparatus or enter desiccation apparatus advance into modifier treatment, to improve sponginess and the mobility of mud.
The sludge drying system of the present invention can include blower unit, heater and heat-exchange device, to improve mummification efficiency and to save the energy.
The sludge drying system of the present invention also includes the desiccation apparatus with the first hothouse and secondary drying chamber.The turning device arranged in the first hothouse is to the shearing of mud, broken and stir and the connected entrance on the demarcation strip for separately the first hothouse and secondary drying chamber or the mud near the side opening that formed between bridge and demarcation strip above connected entrance are struck off in the front end of its blade or ratchet, make to be dried gas to enter into the first hothouse swimmingly from secondary drying chamber and contact fully with mud, thus solve the problem that the inside and outside portion degree of drying of mud is uneven present in the dry run.
The sludge drying system of the present invention has mummification efficiency height, energy consumption is low, floor space is little and adaptable feature, user can by the sludge treatment equipment in the sludge drying system of the present invention, existing sludge treatment equipment be combined with sewage treatment plant, to reduce cost as required.
The method carrying out drying sludge utilizing sludge drying system of the present invention can significantly reduce the moisture content of mud to the quenched of mud and dry run.The assembly that stirs of the turning device by arranging in making the first hothouse of desiccation apparatus constantly stirs, shears and crushes mud and strikes off the mud near connected entrance or side opening, dry gas can be entered the first hothouse swimmingly carried out with mud fully and frequently contacting by connected entrance or side opening from secondary drying chamber, thus improve the mummification efficiency of mud and reduce energy consumption, solve because the viscosity of mud is strong, easily caking, the problem of the difficult dry difficulty caused such as broken.
Accompanying drawing explanation
The structure of the preferred embodiments of the invention, advantage and technique effect is described in detail, wherein below in conjunction with accompanying drawing and specific embodiment:
Fig. 1 is the schematic diagram of the sludge drying system of the present invention；
Fig. 2 is the longitudinal sectional view of the desiccation apparatus in the sludge drying system shown in Fig. 1；
Fig. 3 is the transverse sectional view of the desiccation apparatus in Fig. 2；
Fig. 4 is the schematic perspective view arranging turning device in the first hothouse of desiccation apparatus；
Fig. 5 is to form connected entrance and the schematic perspective view of bridge being provided above at connected entrance on the demarcation strip of a part of curved surface；
Fig. 6 is the zoomed-in view of the part A irised out in Fig. 2；
Fig. 7 is the partition wall sectional view of the Fig. 6 taken at the longitudinal direction being transverse to housing；
Fig. 8 is the flow chart of the mud drying process of sludge drying system；And
Fig. 9 is the flow chart of the mud drying process of the desiccation apparatus of sludge drying system.
Detailed description of the invention
Fig. 1 shows the preferred embodiment of the sludge drying system of the present invention, and wherein, the moisture content of mud can be reduced to less than 40% from about 70-85% by sludge drying system 1, thus obtains the mud of granular.
Sludge drying system 1 generally comprises conveyer device, desiccation apparatus and air-blast device, and can also include modifying device, blower unit, heater and heat-exchange device.
Existing sewage disposal device produces the semi-solid mud of moisture content 70-85% after to sewage disposal.After receiving this semisolid mud, conveyer device 101 can will be sent to be positioned at the desiccation apparatus 105 in conveyer device 101 downstream by such as pipeline, funnel or conveyer belt etc. such as the direction followed the arrow by transport path.Owing to this semi-solid mud has, viscosity is strong, easily caking, difficult broken characteristic, and therefore, being dried gas at drying process, to be difficult to touch it internal and realize being uniformly dried mud.For this reason, it may be necessary to carried out shearing and crushing, so that mud forms agglomerate or block so that mud have certain sponginess and mobility and.To this end, in desiccation apparatus 105, in order to make semi-solid mud form agglomerate or block, adjusting material can be thrown in the first hothouse of desiccation apparatus 105, so that semi-solid mud can convert to agglomerate or block.Along with throwing in adjusting material in desiccation apparatus 105, mud is stirred, shears and crushes by the turning device being arranged in the first hothouse in desiccation apparatus 105.Desiccation apparatus 105 is the bottom dry type mud drying device of a kind of monomeric form, and includes the first hothouse, secondary drying chamber and for by separate to the first hothouse and secondary drying chamber partition wall.Partition wall 4 being formed connection the first hothouse and the connected entrance of secondary drying chamber, being dried in connected entrance enters the first hothouse and to mud therein from secondary drying chamber so that being dried gas.Stirring, shear and crushing due to turning device, the intervention of adjusting material and dry gas to shearing and broken mud continuous print effect, mud is gradually converted into chunky shape, graininess until granular from bulk or bulk.Therefore, the present invention can include adjusting material feeder unit, for feeding adjusting material in the first hothouse by the charging aperture on the top of the first hothouse of desiccation apparatus 105.
Fig. 2 shows a preferred embodiment of the bottom dry type mud drying device of the present invention, and Fig. 3 is the transverse sectional view of the mud drying device in Fig. 2, wherein schematically illustrates the mud drying device of a kind of monomeric form.Bottom dry type mud drying device 105 includes housing, and housing includes upper shell 2, lower house 4a and upper cover (or lid) 3.The bottom of upper shell 2 is used as to be separated into the inner space of housing the partition wall 4 of the first hothouse 6a and secondary drying chamber 6b.Wherein, upper shell 2 and upper cover 3 constitute the first hothouse 6a, and the i.e. partition wall in bottom of lower house 4a and upper shell 2 constitutes secondary drying chamber 6b.Partition wall 4 being formed the connected entrance 5 for connection the first hothouse 6a and secondary drying chamber 6b, can enter into the first hothouse 6a from secondary drying chamber 6b so that being dried gas.Although as it can be seen, the first hothouse 6a and secondary drying chamber 6b arranges up and down but it also may there is other arrangement form.But, housing can be formed by multiple parts or constructed in various ways, such as, the sidewall of the upper shell 2 illustrated can be separately manufactured with partition wall 4, wherein, plate-shaped member can be used as demarcation strip with replacement partition wall and to be arranged on sidewall by demarcation strip, and sidewall, demarcation strip and lower house 4a can also be fitted together.Furthermore it is also possible to be integrally formed with partition wall 4 by lower house 4a, and cancel the bottom of lower house, lower house 4a is arranged on ground etc..The shape of housing is rectangular but it also may be square, polygon, ellipse or other shape.
As shown in the figure, the upper cover 3 of housing is respectively provided with and makes mud to be dried to be dried enter the charging aperture 8 of the first hothouse and the tail gas after discharging dry mud or the air vent 10 of dry gas, and on the end wall away from the upper shell 2 near the partition wall 4 of charging aperture 8, be provided with the discharging opening 9 for dried mud.In a further embodiment, as required the charging aperture 8 and air vent 10 that are used for the first hothouse can be arranged on the optional position in one of them of upper shell 2 and upper cover 3, namely the optional position of the upper part of the first hothouse 6a.Equally, discharging opening 9 can be arranged on the optional position of the circumferential wall including sidewall and end wall of upper shell 2, namely the optional position of the circumferential wall of the first hothouse 6a.
Fig. 4 shows the internal structure of the mud drying device of Fig. 2.The bottom of the first hothouse 6a i.e. partition wall 4 is formed two row's connected entrances 5 and has multiple connected entrance 5 arranged spaced apart in that, in each row, but each connected entrance of multiple connected entrances of a row is arranged over bridge 401 wherein.Except the rectangle illustrated, connected entrance 5 can be of a variety of shapes, the most trapezoidal, rectangle, triangle, arch, circular etc..The length direction X of each connected entrance 5 intersects with the longitudinal direction G of housing, is preferably mutually perpendicular to, and therefore, multiple connected entrances 5 of each row intersect or almost parallel with the longitudinal direction G of housing.
In the first hothouse, the longitudinal direction G along housing be arranged two in parallel for turning device 7a, 7b of stirring mud.Owing to two turning devices 7a, 7b have same or similar structure, therefore, only one of them turning device such as turning device 7a is described in detail.See Fig. 2-4 turning device 7a there is rotary shaft 701a and be fixed in rotary shaft 701a and stir assembly 702a for stir mud.Stir assembly 702a and include four blades or ratchet 703a, and each blade or ratchet 703a extend radially outward from rotary shaft 701a.But, each multiple blades stirring assembly 702a or ratchet 703a can be differing from each other from the length that rotary shaft 701a is extended, and multiple at least one stirred in assembly 702a is stirred assembly and can be had a blade or ratchet that length is longer, and other stirs assembly and can have the shorter blade of length or ratchet.Preferably, multiple each assemblies that stir stirring assembly 702a in rotary shaft 701a correspond to each other with each connected entrance in multiple connected entrances 5 respectively, and generally stir the top end face of the blade on assembly or ratchet 703a to connected entrance 5, and the length of blade or ratchet 703a is configured to its front end or top can strike off connected entrance in or neighbouring mud, in order to the dry gas in secondary drying chamber 6b can move smoothly through connected entrance 5 and enter the first hothouse 6a.
Although being dried gas (as shown by arrows) to enter the first hothouse 6a by the connected entrance 5 on partition wall 4 from secondary drying chamber 6b, being dried, to increase, the chance that gas contacts with mud, and being discharged by air vent 10 after interacting with mud,.But, when mud to be dried is in charging aperture 8 renders to the first hothouse 6a and after being deposited on partition wall 4, along with the effect stirring and being dried gas stirring assembly 702a, 702b of turning device 7a, 7b, a part of mud can be dropped from the first hothouse 6a by connected entrance 5 or leak into secondary drying chamber 6b.In order to reduce the leakage of mud, bridge 401 is arranged on the top of connected entrance 5, in order to utilize bridge 401 to stop mud through connected entrance to the leakage of secondary drying chamber 6b.As it can be seen, be arranged over bridge 401 in each of another multiple connected entrances arranged.Bridge 401 is arranged on the length direction X of connected entrance and strides across connected entrance 5, and almost parallel with the length direction of connected entrance 5.The length of bridge 401 is longer than the length of connected entrance 5, thus bridge 401 can ride upon above connected entrance 5 as bridge on the length direction of connected entrance 5, and its two ends are separately fixed on the partition wall 4 near the end margin of connected entrance.Owing to the interlude of bridge 401 is positioned at the top of connected entrance 5, thus between bridge 401 and partition wall 4, form side opening 402, and side opening 402 can be formed in the side of bridge 401 or form a side opening 402 in its every side.Therefore, the opening direction of side opening 402 is almost parallel with the longitudinal direction G of the axial direction of rotary shaft or housing.The bridge 401 of the top of connected entrance 5 advantageously reduces mud and drops from the first hothouse 6a or leak into secondary drying chamber 6b, but is deposited in the mud near side opening and also disturbs dry gas and enter in the first hothouse 6a from secondary drying chamber 6b.In order to promote to be dried the flowing of gas, each blade being configured to make it stirring assembly 702b of turning device 7b or the lateral edges of the front end of ratchet 703b or front end can strike off the mud near the side opening 402 of bridge 401.Can often the multiple connected entrances in row or the distance that is spaced of bridge determine that turning device 7a, 7b's stirs assembly 702a, 702b interval on rotary shaft 701a, 701b according on partition wall 4, in order to when rotary shaft rotates, near each connected entrance or bridge, mud can be struck off by the front end of the blade or ratchet that stir assembly.In a word, connected entrance or the bridge position on partition wall is associated with stirring assembly position on the rotating shaft, but the quantity of the quantity and connected entrance 5 or bridge thereon 401 stirring assembly 702a, 702b need not one_to_one corresponding.
As it is shown on figure 3, the partition wall 4 between the first hothouse 6a and secondary drying chamber 6b has recessed upper surface.Looking up in the side of the longitudinal direction G being transverse to housing, the upper surface of partition wall 4 has recessed shape, namely the curved section on recessed surface is downwardly projected towards secondary drying chamber 6b from the first hothouse 6a, and in other words, the first hothouse 6a has the bottom of indent.Therefore, partition wall is shown as recessed area at the longitudinal direction G of housing.As it can be seen, the partition wall 4 of curved surface is recessed towards the region of each turning device of two turning devices 7a, 7b, the most each recessed area is corresponding with stirring assembly 702a or 702b, and recessed area can be circular arc.The bridge of the top being arranged on connected entrance can be plate, wherein, including flat board, twisted plate, herringbone plate etc..
Fig. 5 shows the preferred embodiment of the bridge on partition wall.The bridge 401 of flat board is positioned at the top of connected entrance 5 and is parallel to each other with connected entrance in the longitudinal direction, thus forms side opening 402 between bridge 401 and partition wall 4.If the recessed area of partition wall 4 is circular arc, then the shape of side opening 402 just presents crescent.Therefore, the shape of side opening 402 depends on the shape of recessed area of bridge 401 and partition wall.
Fig. 6 shows the amplification view of the part A irised out in Fig. 2, wherein, it is shown that the assembly that stirs of turning device is near a side opening.The bridge 401 of flat board is positioned at the top of connected entrance 5 and its both sides and defines two side openings 402 with partition wall.From the lower section of partition wall 4, i.e. secondary drying chamber 6b enters connected entrance 5 and is accomplished by turning to and gets to the first hothouse 6a through left or right side opening 402 dry gas as shown by arrows.Therefore, between the first hothouse and secondary drying chamber, there is at least one crooked route from connected entrance to side opening, in order to reduce mud from the first hothouse to the leakage of secondary drying chamber.The position stirring assembly 702b of turning device 7b make its blade or the front end of ratchet striking off one of them side opening 402 between bridge 401 and partition wall 4 near mud, and the leakage not only contributing to reduce mud of striking off to the mud near side opening, and also contribute to be dried gas from the first hothouse to the flowing of secondary drying chamber.In another embodiment, scraped parts can be installed on the blade stirring assembly or ratchet, to utilize the front end of scraped parts to strike off the mud near side opening.In another embodiment, side shield can be set in the side of bridge 401 to be blocked by one of them side opening, and only retain opposite side opening, enter the first hothouse 6a in one direction to allow to be dried gas.Side shield is arranged in side opening 402 along the length direction of bridge 401, to stop dry gas to pass therethrough, the assembly 702 that stirs of turning device 7 so can be made only to strike off the mud near opposite side opening 402.This set of baffle plate is to make dry gas outflow side opening 402 the most in one direction enter the first hothouse 6a, and prevents being dried gas and enter the first hothouse from contrary other direction and reduce the leakage of mud.
See shown in Fig. 2-4, in turning device 7a, 7b of two interlaced arrangement each other, in first rotary shaft 701a first stirs the blade of assembly 702a or the scraped front end of ratchet and stirs between assembly 702b close to the second rotary shaft 701b and at two adjacent second, otherwise and the most such.The most both shortened the distance between axles between the first rotary shaft 701a and the second rotary shaft 701b, it also avoid first stir assembly 702a and second stir between assembly 702b occur interfere.In another embodiment, can be configured to partition wall 4 only be formed on multiple connected entrance 5, and each turning device 7a, 7b multiple to stir assembly 702a, 702b the most corresponding with multiple connected entrances 5 respectively, in order to the interior or neighbouring mud of connected entrance 5 can be struck off in the scraped front end of the blade or ratchet 703a, 703b that stir assembly 702a, 702b.Bridge 401 can also be provided above at connected entrance 5, and each turning device 7a, 7b multiple to stir assembly 702a, 702b the most corresponding with multiple bridges 401 respectively, so that the lateral edges stirring the blade of assembly 702a, 702b or the scraped front end of ratchet 703a, 703b can strike off the mud near the side opening 402 of bridge 401, so that being dried gas to smoothly flow therein the first hothouse 6a.In addition to the effect of striking off, blade or ratchet 703a, 703b of stirring assembly 702a, 702b also function to shearing, crush and stir the effect of mud.In another embodiment, scraped parts can be installed on blade or ratchet, in order to the mud near connected entrance or side opening can be struck off in the front end of scraped parts.
See Fig. 2, rotary shaft 701a of two turning devices 7a, 7b, 701b one end on can be respectively equipped with and power input.By external impetus device drives actuating device, and actuating device drives rotary shaft 701a, 701b to rotate successively, the such as gear of the power input on rotary shaft 701a, 701b or belt pulley 18b is made to drive in two rotary shafts 701a, 701b, so that another rotary shaft rotates.First rotary shaft 701a and the second rotary shaft 701b both can rotate the most in the opposite direction, it is also possible to rotate the most in the same direction.
Fig. 7 shows the blade stirring on assembly of turning device or the top of the ratchet preferred embodiment through the rotational trajectory of the lower concave part office of the partition wall 4 of curved surface.Blade or ratchet 703b have a rotational trajectory of circle, and when blade or ratchet 703b top along the curved surfaces of partition wall 4 inswept time, near connected entrance 5, the top of blade or ratchet 703b is roughly equal with the distance of the inner surface of partition wall 4.This arcuate shape contributes to when stir the blade of assembly or the scraped front end of ratchet or the lateral edges of the front end of scraped parts that is arranged on blade or ratchet skims over side opening 402, after removing its neighbouring mud, the mud being stripped off and digging is also easier to fall back to the lower position in the first hothouse 6a along the recessed curved profile of partition wall, thus improves the contact frequency of dry gas and mud.Preferably, the contour line of the recessed area of partition wall 4 inner surface in the horizontal and the blade stirring assembly 702a, 702b of each turning device 7a, 7b or the scraped top of ratchet 703a, 703b or the rotational trajectory on the top of scraped parts installed on it are similar, namely the radius R that the demarcation strip of curved surface is in the face of the recessed circular arc region of turning device slightly larger than the axis of rotary shaft to distance r on the top stirring assembly.
As shown in Figures 2 and 3, secondary drying chamber 6b includes the air inlet 15 being arranged on the sidewall of lower house 4a, namely air inlet 15 is positioned on the sidewall of secondary drying chamber 6b, enters in secondary drying chamber 6b being used in the dry gas of mud to be dried, and air inlet can be one or more.Although stirring the blade of assembly 702a, 702b or the scraped front end of ratchet 703a, 703b or the mud contributing to reducing in the first hothouse 6a that strikes off of the mud near the side opening 402 of the bridge 401 above connected entrance 5 or connected entrance being dropped in secondary drying chamber 6b by the front end of scraped parts that is fixed on blade or ratchet, but still some mud may be had to be leaked in secondary drying chamber 6b by connected entrance 5 or the crooked route from side opening to connected entrance.In order to remove the mud leaked in secondary drying chamber 6b, being provided with clean-up port 15a on the end wall of lower house 4a, wherein, clean-up port 15a is used for the mud discharging alluvial in secondary drying chamber 6b.Furthermore it is possible to the position near bottom arranges discharge device, mud to be sent to the clean-up port 15a of one end of secondary drying chamber 6b and discharges housing in secondary drying chamber 6b.Secondary drying chamber 6b is the most substantially in infundibulate, the sidewall of its sidewall namely lower house 4a gradually narrows towards bottom from partition wall, and the shape at the position narrowed namely bottom is arc or semicircular, thus form the vertical passage of an arc section in the bottom of secondary drying chamber 6b.The mud leaked by the first hothouse 6a by the crooked route from side opening to connected entrance can be pooled in the vertical passage of arc section, in order to outside being discharged to housing easily by the discharge device being arranged in vertical passage.Leak into the mud in secondary drying chamber 6b to be dried again or redrying by the dry gas entering in secondary drying chamber 6b, to reduce the moisture content of mud further.In order to keep the opposing seal of secondary drying chamber 6b, movable baffle plate can be set at the 15a of clean-up port, do not leak so that being dried gas, and when discharging mud, sideboard is opened.
Sludge drying system 1 also includes air-blast device 12.As by the connection pipeline that represents in the direction of the arrow, desiccation apparatus 105 is connected with air-blast device 12 by air inlet 15, and wherein, air-blast device 12 can be dried the dry gas of mud and be blown into the secondary drying chamber 6b of desiccation apparatus 105.
Sludge drying system 1 can also include blower unit 13, heater 108 or heat-exchange device 103.If as it is shown in figure 1, need the hot drying gas blowed in secondary drying chamber 6b, heater 108 can be arranged at the downstream position of air-blast device 12, in order to provide the dry gas of heating to desiccation apparatus 105.Blower unit 13 can be arranged on the downstream position of desiccation apparatus 105, so that tail gas or dry gas after dry mud flow out as early as possible from the first hothouse 6a.Heat-exchange device 103 can be associated with air-blast device 12 and blower unit 13, and wherein, the hot junction of heat-exchange device 103 is connected with air-blast device 12, and its cold end is connected with blower unit 13.So, tail gas from blower unit 13 passes through the cold end of heat-exchange device 103, and the hot junction that the dry gas of the outside of air-blast device 12 to be entered is by heat-exchange device 103, heat-exchange device 103 is made to reclaim the heat in tail gas by heat-exchanging part and transfer heat to the dry gas for mud to be dried of air-blast device 12 to be entered, to improve the thermal efficiency.
Seeing Fig. 1 and 3, air-blast device 12 connects with secondary drying chamber 6b with air inlet 15 through pipeline, in order to be blown in secondary drying chamber 6b by dry gas.Blower unit 13 connects with the first hothouse 6a with air vent 10 through pipeline.The dry gas being transported in secondary drying chamber 6b can be such as the dry medium such as hot gas, gas, hot-air, gas at normal temperature or frozen gas containing chemical substance, it is also possible to is the dry medium of formulated.Air-blast device 12 can be used to improve dry gas and flows into the speed in secondary drying chamber 6b, and blower unit 13 can accelerate the tail gas outflow from the first hothouse 6a.Typically, air-blast device can be aerator or fan, and blower unit can be air-introduced machine.Alternatively, it is also possible to substitute air-blast device 12 with pressurizer, so that dry gas is transported to secondary drying chamber 6b with certain pressure, accelerate to flow into the first hothouse 6a so that being dried gas.Equally substitute blower unit 13 with decompressor, to accelerate the flowing of tail gas, thus improve sludge drying efficiency.Heater can be separately provided, it is also possible to integrates with air-blast device.It addition, mud therein can be dried again in the dry gas of heating is transported to secondary drying chamber 6b by air-blast device or pressurizer.At the dry gas of heating to dropping or leaking into while the mud in secondary drying chamber 6b carries out redrying, a part of heat therein can also be delivered to, by upper shell 2 that metal material is made and partition wall 4, the mud that is laid on partition wall 4, so that the mud in the first hothouse 6a to play the effect of auxiliary mummification.
Sludge drying system 1 can also include modifying device 102, and wherein, modifying device 102 can replace input adjusting material in desiccation apparatus 105.In order to change toughness and the hydrophilic of mud, namely improve mobility or sponginess, adjusting material is mixed by modifying device 102 with mud, to promote mud to become agglomerate or block, wherein, adjusting material can be previously laid in modifying device 102, it is also possible to enters modifying device 102 at mud and throws in simultaneously or after.
Mud after conditioned is by being sent to be positioned at the desiccation apparatus 105 in modifying device 102 downstream such as pipeline, funnel or conveyer belt etc..In desiccation apparatus 105, the agglomerate of mud or block by the shearing of turning device, broken and stir and with dry gas be fully contacted gradate into broken certainly and granule, thus eventually become the mud of the granular of moisture content less than 40%.Mud after drying is discharged by being arranged on the discharging opening 9 of desiccation apparatus.Mud through dried does not haves the secondary pollution problem to environment after landfill, and if for composting, make construction material etc. and can also realize the recycling of resource.
Fig. 8 shows sludge drying flow process or the method for the present invention.As it has been described above, the mud of the moisture content 70-85% received can be directly obtained the mud of moisture content less than 40% after drying and other treatment by the sludge drying system 1 of the present invention.Utilize sludge drying system 1 to carry out sludge drying method and be applicable to process the semisolid mud of moisture content 70-85%, such as, supplying step 101a is implemented after having detected the moisture content of mud, conveyer device 101 can be utilized mud to be transported to the dehydration device 105 in downstream or is delivered to modifying device 102 and carries out modifier treatment, in quenched step 102a, adjusting material is mixed with mud, so that semi-solid mud is changed into bulk or bulk, and conditioned after mud be transported to desiccation apparatus 105 to carry out drying and other treatment.In mummification step 105a, the mud of bulk or bulk is transported in the first hothouse of desiccation apparatus 105, being stirred mud by the assembly that stirs of turning device, sheared and dry gas broken, that enter in the first hothouse from secondary drying chamber through connected entrance or side opening contact and stir the blade of assembly or scraped front end the striking off the mud near connected entrance or side opening of ratchet with mud, mud has obtained sufficient dry.The mud being dried is discharged desiccation apparatus 105 by implementing discharging step 9a.Additionally, the drying process at mud needs to implement aeration step 12b, wherein, make to be dried gas and enter air-blast device 12, and by air-blast device 12, dry gas is blown into the air inlet 15 of secondary drying chamber 6b.In another embodiment, it is possible to implement air inducing step 13b, by blower unit 13, tail gas is reclaimed from the air vent 10 of the first hothouse, to flow to follow-up processing equipment.Heating steps 104a can also be implemented, make the outside gas that is dried flow through heater 104 so that dry gas is heated to desired temperature.Heat exchange steps 103a can also be implemented, the tail gas reclaimed by blower unit 13 is transported to the cold end of heat-exchange device 103, by heat exchanging process, the heat in tail gas is passed to flow through the dry gas in the hot junction of heat-exchange device 103, such that it is able to improve the utilization rate of used heat.
Fig. 9 shows the flow process utilizing desiccation apparatus 105 to realize mud drying process or method.In conjunction with Fig. 2 and 3, mud drying process can be implemented by each device illustrated.Semi-solid mud or quenched mud are in feed step 8a enters into the first hothouse 6a of desiccation apparatus 105 (as is shown in phantom lines).Stirring and curettage step 105a1, external impetus equipment (not shown) drives rotary shaft 701a, 701b to rotate by actuating device and power input such as power input 18b, and then drive is stirred assembly 702a, 702b and rotated.Mud is constantly stirred stirring assembly 702a, 702b, and stir each blade of assembly or ratchet 703a, 703b continuous shear stress and broken while, stir the blade of assembly 701a, 701b or the scraped front end of ratchet 702a, 702b or the front end of scraped parts being arranged on blade or ratchet or its lateral edges strike off the mud near connected entrance 5 or side opening 402 by certain time interval.Meanwhile implement air inlet step 15a, air-blast device 12 feed dry gas into the secondary drying chamber 6b of desiccation apparatus 105 through pipeline and air inlet 15.The flowing velocity being dried gas entrance secondary drying chamber 6b is associated with air supply velocity.Stir the blade of assembly or the front end of ratchet 702a, 702b or the front end of scraped parts that is arranged on blade or ratchet and striking off of the mud near connected entrance or side opening 402 is smoothly flowed therein the first hothouse 6a so that being dried gas.Along with stirring the blade of assembly or ratchet 702a, 702b shearing to mud, broken and stir and be dried the gas desiccation to mud in the first hothouse 6a, the granularity of mud tapers into and powder, thus the degree of drying of mud also improves constantly.After completing being dried of mud, it is dried gas be transported in air or in heat-exchange device 103 by the blower unit 13 air vent 10 and pipeline through being positioned at the top of the first hothouse 6a in steps of exhausting 10a, and in discharging step 9a, dried mud discharging opening 9 is discharged.Dried mud can be transported to mud collecting device by the discharging opening 9 of the first hothouse in discharging step 9a.In addition, redrying or drying steps 105a2 again at mud, the mud leaking in secondary drying chamber by connected entrance 5 or the crooked route from connected entrance to side opening is dried or redrying by dry gas again that be transported in secondary drying chamber 6b by air-blast device 12, to reduce the moisture content of mud further.It addition, feed step 8a, stir and both can implement successively with curettage step 105a1, air inlet step 15a, steps of exhausting 10a and redrying step 105a2, can implement again simultaneously.
Although list in this application multiple preferred embodiment, but the present invention is not limited only to the content arrived mentioned by description, those skilled in the art completely can be changed by all parts in the above-mentioned design philosophy of the present invention bottom dry type mud drying device to the present invention or device and be retrofited, and these changes or remodeling are all within the concept of the present invention.
Claims (21)
1. a sludge drying system, described sludge drying system includes:
Conveyer device, described conveyer device is for receiving and carry the mud desiccation apparatus to downstream；And
Desiccation apparatus, described desiccation apparatus includes:
Housing, wherein, is provided with demarcation strip in described housing, so that the space in described housing to be separated into the first hothouse and secondary drying chamber, and forms at least one connected entrance for connecting described first hothouse and described secondary drying chamber on described demarcation strip；
It is arranged on the charging aperture for mud to be dried on the top of described first hothouse and the air vent of the dry gas after discharging dry mud, and the discharging opening for dried mud being arranged on the circumferential wall of described first hothouse；
At least one being arranged on the sidewall of described secondary drying chamber is for the air inlet of the dry gas of mud to be dried；
At least one turning device for stirring mud being arranged in described first hothouse, at least one turning device described includes rotary shaft and at least one being arranged in described rotary shaft stirs assembly, wherein, described at least one stir the mud near at least one connected entrance described in assembly scraped；And
Air-blast device, wherein, described air-blast device connects with described secondary drying chamber through at least one air inlet described.
Sludge drying system the most according to claim 1, it is characterised in that its modifying device also including being positioned at conveyer device downstream, wherein, described modifying device is used for making adjusting material mix with mud, to change toughness and the hydrophilic of mud.
Sludge drying system the most according to claim 1 and 2, it is characterised in that on its circumferential wall of described secondary drying chamber being additionally included in described desiccation apparatus or bottom, at least one clean-up port is set.
4. according to the mud drying device according to any one of claim 1-3, it is characterised in that it also includes the heater for heat drying gas, and wherein, described heater is positioned at upstream or the downstream of described air-blast device.
5. according to the mud drying device according to any one of claim 1-4, it is characterised in that it also includes blower unit, and wherein, described blower unit connects with described first hothouse through described air vent.
6. according to the sludge drying system according to any one of claim 1-5, it is characterized in that, it also includes heat-exchange device, and the cold end of described heat-exchange device is connected with described blower unit, and its hot junction is connected with described air-blast device, in order to reclaim the heat from described air vent tail gas out.
7. according to the sludge drying system according to any one of claim 1-6, it is characterised in that it also includes adjusting material feeder unit, and wherein, adjusting material is fed in the first hothouse of described desiccation apparatus by described adjusting material feeder unit.
8. according to the sludge drying system according to any one of claim 1-7, it is characterized in that, at least one mud turning device described described at least one stir assembly there is at least one blade or ratchet extended radially outwardly from described rotary shaft, wherein, described in when described rotary shaft rotates, at least one stirs at least one blade described in assembly or the front end of ratchet or the front end of scraped parts that is arranged on blade or ratchet can be struck off or part strike off at least one connected entrance described in or near mud.
9. according to the sludge drying system according to any one of claim 1-8, it is characterized in that, it also includes being arranged on the bridge above at least one connected entrance described, wherein, side opening is formed, to form the crooked route from least one connected entrance described to described side opening between described bridge and described partition wall.
10. according to the sludge drying system according to any one of claim 1-9, it is characterized in that, described at least one to stir assembly corresponding with described bridge, in order at least one at least one blade described stirring assembly described or the front end of ratchet or the lateral edges of the front end of scraping member being arranged on blade or ratchet can strike off or part strikes off the mud near described side opening.
11. according to the sludge drying system according to any one of claim 1-10, it is characterised in that described partition wall has recessed upper surface.
12. according to the sludge drying system according to any one of claim 1-11, it is characterized in that, described at least one include at least two mud turning device, the most each mud turning device includes multiple stirring assembly, and at least one connected entrance described in the scraping member scraped of the plurality of each at least one blade described stirred in assembly or the front end of ratchet or the front end that is arranged at least one blade described or ratchet or neighbouring mud, wherein, the plurality of assembly that stirs of one of them the mud turning device in described at least two mud turning device stirs assembly layout interlaced with each other with the plurality of of another.
13. according to the sludge drying system according to any one of claim 1-12, it is characterized in that, it also includes the discharge device being arranged in described secondary drying chamber, for the mud being dried again leaked in described secondary drying chamber from described first hothouse is discharged described clean-up port.
The method that 14. 1 kinds of sludge drying systems used according to any one of the claims carry out sludge drying, said method comprising the steps of:
By conveyer device, mud it is transported to the charging aperture of desiccation apparatus and makes mud enter in the first hothouse of described desiccation apparatus；At least one the mud turning device being arranged in described first hothouse is made to run, wherein, rotary shaft at least one mud turning device described drives at least one to stir assembly and rotates, thus described at least one second stir the mud near at least one connected entrance that at least one blade of assembly or the front end scraped of ratchet are formed on the demarcation strip of described first hothouse and secondary drying chamber；With
Make to be dried in gas enters described secondary drying chamber and enter described first hothouse by described at least one connected entrance (5) to contact with mud by air-blast device.
15. methods according to claim 14, it is characterised in that it also includes:
Adjusting material is thrown in, so that described adjusting material mixes with mud in described desiccation apparatus.
16. according to the method described in claims 14 or 15, it is characterised in that it also includes quenched step, wherein, is transported in modifying device by mud by conveyer device, so that mud mixes with adjusting material, so that quenched mud to be transported to the desiccation apparatus in downstream.
17. according to the method according to any one of claim 14-16, it is characterised in that it also includes heating steps: utilize described heater to heat the dry gas leaving or entering described air-blast device.
18. according to the mud drying device according to any one of claim 14-17, it is characterised in that it also includes blower unit, and wherein, described blower unit connects with described first hothouse through described air vent.
19. according to the method according to any one of claim 14-18, it is characterized in that, it also includes heat exchange steps: will be passed to enter the dry gas of described air-blast device by described blower unit heat from the tail gas of described first hothouse extraction by heat-exchange device.
20. according to the method according to any one of claim 14-19, it is characterized in that, it also includes striking off mud step: at least one at least one blade stirring assembly described at least one mud turning device described in making when described rotary shaft rotates or the front end of ratchet or the scraped parts installed on it strike off the mud near at least one connected entrance described.
21. according to the method according to any one of claim 14-20, it is characterized in that, it also includes curettage step: at least one at least one blade stirring on assembly described at least one mud turning device described in making when described rotary shaft rotates or the front end of ratchet or the scraped parts scraped installed on it are arranged between at least one bridge and the described demarcation strip above at least one connected entrance described mud near the side opening formed.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025421.4A CN105819665B (en) | 2015-01-07 | 2015-01-07 | Sludge drying system and method |
| PCT/CN2015/099793 WO2016110213A1 (en) | 2015-01-07 | 2015-12-30 | Sludge drying system and method |
| TW105100061A TW201641448A (en) | 2015-01-07 | 2016-01-04 | Sludge drying system and method |
| HK16110799.4A HK1222642A1 (en) | 2015-01-07 | 2016-09-13 | Sludge drying system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025421.4A CN105819665B (en) | 2015-01-07 | 2015-01-07 | Sludge drying system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105819665A true CN105819665A (en) | 2016-08-03 |
| CN105819665B CN105819665B (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510025421.4A Active CN105819665B (en) | 2015-01-07 | 2015-01-07 | Sludge drying system and method |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN105819665B (en) |
| HK (1) | HK1222642A1 (en) |
| TW (1) | TW201641448A (en) |
| WO (1) | WO2016110213A1 (en) |
Cited By (4)
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| CN106477643A (en) * | 2016-10-27 | 2017-03-08 | 浙江荣凯科技发展股份有限公司 | A kind of high efficiency chemistry waste water and dregs processing equipment |
| CN107445446A (en) * | 2017-09-22 | 2017-12-08 | 美恩科技股份有限公司 | A kind of column plate type dries installation for fermenting |
| CN110002708A (en) * | 2019-04-18 | 2019-07-12 | 苏州草宝能源科技有限公司 | A kind of pyrolyzing sludge dehydration and drying processing burning disposing technique |
| CN110002707A (en) * | 2019-04-18 | 2019-07-12 | 苏州草宝能源科技有限公司 | A kind of multistage technique for being heat-treated dry sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107702502A (en) * | 2017-10-17 | 2018-02-16 | 佛山市金凯地过滤设备有限公司 | A kind of belt drying device with humidity discharging function |
| CN107973517A (en) * | 2017-12-27 | 2018-05-01 | 中运建设控股有限公司 | A kind of mud drying device |
| CN113548784A (en) * | 2021-08-26 | 2021-10-26 | 北京中科国通环保工程技术股份有限公司 | Method and device for efficient sludge heat drying treatment |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201641448A (en) | 2016-12-01 |
| CN105819665B (en) | 2023-06-16 |
| WO2016110213A1 (en) | 2016-07-14 |
| HK1222642A1 (en) | 2017-07-07 |
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