CN204779275U - Dry formula sludge drying device in bottom - Google Patents
Dry formula sludge drying device in bottom Download PDFInfo
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- CN204779275U CN204779275U CN201520008594.0U CN201520008594U CN204779275U CN 204779275 U CN204779275 U CN 204779275U CN 201520008594 U CN201520008594 U CN 201520008594U CN 204779275 U CN204779275 U CN 204779275U
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Abstract
The utility model provides a dry formula sludge drying device in bottom, it includes the casing, wherein, the space in the casing constitutes the drying chamber for mummification mud. The mud of setting in the drying chamber device that stirs, wherein, mud stirs the device and includes that the axis of rotation is rotating the epaxial subassembly that stirs with fixing. The gas vent of the dry gas behind the setting is used for treating dry mud on the top of drying chamber feed inlet and the dry mud that is used for discharging and set up the circumference wall at the drying chamber on the discharge gate that is used for the mud after the drying. The intercommunication mouth of formation on the bottom plate of casing to the outer dry gas of permission casing gets into the drying chamber, and wherein, the subassembly that turns can strike off near intercommunication mouthful interior or mud. Support housing's strutting arrangement, strutting arrangement make the bottom plate leave the ground certain distance to certain space has between casing and bottom plate.
Description
Technical field
The utility model relates to a kind of mud drying device, relates generally to a kind of mud drying device, particularly a kind of bottom drying type mud drying device of monomeric form.
Background technology
Along with the development in city, the sewage quantity produced in industrial production to be processed and life is needed to increase gradually, and as the byproduct after sewage disposal---the quantum of output of mud also can be increasing, but, relative to sewage, the process of mud seems more difficult.At present, sewage work generally adopts method that is concentrated or dehydration to carry out process in early stage to mud, after the water content of mud is reduced to 60-80% from more than 90%, carry out landfill, solidification or drying and other treatment to mud.The problem that landfill is easy to make sludge fermentation and occurs secondary pollution environment, and existing solidification or drying equipment need to consume a large amount of energy in the process of strong, the easy caking of process viscosity, difficult broken mud, therefore, are difficult to reduce costs and raise the efficiency.
Chinese invention patent (CN101186422A) proposes a kind of enclosed multi-chamber fluidized bed drying method for sludge, and this method needs to be blended in mud by the inert particle of such as river sand before drying sludge, afterwards high pressure, high-temperature gas are blown into carry out drying to mud mixture fluidized-bed from bottom through air distribution plate, and the mud after mummification is blown afloat and is discharged fluidized-bed again after crossing overflow plate step by step.This method not only causes the amount of the mud of every secondary mummification very little but also consume the energy, and therefore, its efficiency is very low, is difficult to realize continuously and large-scale sludge drying operation.
To be submitted to by the applicant and the Chinese utility model patent of authorizing (CN201000261Y) proposes a kind of mud low-temperature drier.Although this drying installation can realize a certain amount of drying sludge, spended time is long, has therefore both consumed the object that the energy does not reach the raising mummification efficiency of expection yet.
Chinese utility model patent (CN203319838U) proposes a kind of sludge solidification processing agitator, this stirrer is by stirring mud and dry powder blend to realize the solidification of mud, not only do not remove the moisture in mud, also add the volume of mud, and cause the mud after solidifying to be utilized again.
The application for a patent for invention (attorney docket CPME1443360N) submitted on the same day with the application proposes a kind of mud drying device of bottom ventilation.This mud drying device carries out drying through the connected entrance that is formed on the base plate of kiln to mud wherein by making dry gas.But this device also exists dry gas and is difficult to enter connected entrance swimmingly and the defect of passing mud, thus makes the drying process of mud still slow.
For this reason, need a kind of mud drying device of improvement, to improve the mummification efficiency of mud.
Summary of the invention
In order to overcome the deficiencies in the prior art, present applicant has proposed a kind of bottom drying type mud drying device of monomeric form.In mud drying device of the present utility model, while the turning device in kiln stirs mud, its stir blade on assembly or ratchet rotated around rotation axis is implemented to shear to mud and broken, improve mud and dry gas contact frequency, and then solve the uneven problem of inside and outside portion degree of drying that mud occurs in drying process.
In mud drying device of the present utility model; dry gas is enable to enter kiln also through mud from the bottom of mud by the connected entrance formed on base plate; and along with turning device to the stirring of mud, to shear and broken; mud granule degree constantly changes and changes towards powderization; and then improve mobility and the sponginess of mud, accelerate the rate of drying of mud.
In mud drying device of the present utility model, by to strike off in the front end stirring longer blade on assembly or ratchet of turning device or the front end of scraped parts that is arranged on blade or ratchet in connected entrance or near mud, make dry gas can move smoothly through connected entrance and enter in kiln.
In mud drying device of the present utility model, by air-blast device, blower unit or/and heating unit, and the configuration of boosting base plate, accelerate the velocity of flow that outside dry gas enters kiln, facilitate the contact of dry gas and mud, improve drying efficiency.
In mud drying device of the present utility model, by arranging two turning devices be arranged side by side in kiln, particularly, the assembly that stirs of two turning devices is staggered mutually layout, not only increase the contact frequency of dry gas and mud, but also make mud drying device total compacter.
The bottom drying type mud drying device of monomeric form of the present utility model has that mummification efficiency is high, energy consumption is low, floor space is little and adaptable feature, is applicable to the needs of existing market completely.Due in densely populated city, sewage work arranges and comparatively disperses, and therefore, when not needing the equipment changed on a large scale in sewage work, is suitable for the mud drying device arranging this small-sized monomeric form.
Bottom of the present utility model drying type mud drying device constantly stirs mud by the assembly that stirs of the turning device arranged in kiln, and mud is sheared and fragmentation continuously, thus high, the easy caking of the viscosity solving mud, a difficult broken difficult problem.In addition, by being arranged on the front end of stirring blade on assembly or ratchet or the scraped parts be arranged on blade or ratchet strike off mud in connected entrance or neighbouring, and the compound action of the air inlet of connected entrance from the base plate being arranged on housing, not only can prevent the blocking of connected entrance, and accelerate dry gas and enter velocity of flow in kiln, thus the chance that increase dry gas fully contacts with mud, the drying efficiency of mud is greatly improved.
The utility model provides a kind of bottom drying type mud drying device, and described mud drying device comprises housing, and wherein, the space in described housing forms the kiln in order to dewatered sludge; Be arranged at least one mud turning device of described kiln, wherein, at least one mud turning device described comprises rotation axis and at least one being fixed on described rotation axis stirs assembly; Be arranged on the upper part of described kiln for the opening for feed of mud to be dried and the venting port for the dry gas after sludge-drying, and be arranged on the discharge port for dried mud on the circumferential wall of described kiln; And at least one connected entrance be formed on the base plate of described housing, to allow the dry gas outside housing to enter described kiln, wherein, described at least one stir assembly and can strike off mud at least one connected entrance described or neighbouring; And supporting the bracing or strutting arrangement of described housing, described bracing or strutting arrangement makes described base plate leave ground certain distance, to have certain space between described housing and base plate.
According to such scheme, at least one connected entrance described on described base plate has rule or irregular shape.
According to each scheme above-mentioned, at least one mud turning device described described at least one stir assembly and there is at least one blade or ratchet of extending radially outwardly from described rotation axis, for stirring, shearing and broken mud.
According to each scheme above-mentioned, described at least one stir assembly in the face of at least one connected entrance described, so that the front end of at least one at least one blade described or ratchet stirring assembly described can be struck off or part strikes off mud at least one connected entrance described or neighbouring.
According to each scheme above-mentioned, described at least one stir assembly in the face of at least one connected entrance described so that at least one front end stirring the scraped parts that at least one blade described in assembly or ratchet are installed described can strike off part is struck off at least one connected entrance described or near mud.
According to each scheme above-mentioned, at least one connected entrance described comprises multiple connected entrance, wherein, described multiple connected entrance is arranged at certain intervals on the longitudinal direction of described housing, and the length direction of each connected entrance intersects with the longitudinal direction of described housing or vertical.
According to each scheme above-mentioned, at least one mud turning device described comprises and multiplely stirs assembly, wherein, described multiple assembly that stirs is arranged at certain intervals on described rotation axis, and eachly stir the corresponding connected entrance of assembly in described multiple connected entrance so that described in stir assembly the front end of at least one blade or ratchet can to strike off or part strikes off mud in corresponding connected entrance or neighbouring.
According to each scheme above-mentioned, at least one mud turning device described comprises and multiplely stirs assembly, wherein, described multiple assembly that stirs is arranged at certain intervals on described rotation axis, and eachly stir the corresponding connected entrance of of assembly in described multiple connected entrance so that the front end of the scraped parts that the blade stirring assembly described or ratchet are installed can be struck off or part is struck off in described corresponding connected entrance or near mud.
According to each scheme above-mentioned, describedly multiplely stir the quantity of assembly and the not identical of described multiple connected entrance.
According to each scheme above-mentioned, at least one mud turning device described comprises and multiplely stirs assembly, wherein, described some stirring in assembly multiple are stirred assembly and are had longer blade or ratchet, and other stir assembly and have shorter blade or ratchet, and at least one connected entrance described comprises multiple connected entrance, wherein, the assembly that stirs with longer blade or ratchet is alternately arranged on described rotation axis with the assembly that stirs with shorter blade or ratchet, and have that to stir assembly described in longer blade or ratchet corresponding with described multiple connected entrance respectively, so that mud in corresponding connected entrance or neighbouring can be struck off in the front end of described longer blade or ratchet.
According to each scheme above-mentioned, at least one mud turning device described comprises two mud turning devices that the longitudinal direction along described housing is arranged side by side, wherein, each turning device has rotation axis and is fixed on described rotation axis and multiplely stirs assembly, and at least one connected entrance described comprises multiple connected entrance, wherein, it is corresponding with described multiple connected entrance respectively that each turning device described multiple stir assembly, so that described multiple stir assembly each described in stir one or more blade on assembly or ratchet front end can strike off mud in corresponding connected entrance or neighbouring.
According to each scheme above-mentioned, one of them turning device in described two mud turning devices described multiple stir assembly and the described multiple of another turning device stir assembly staggered arrangement, wherein, described multiple of stirring in assembly of one of them turning device described stir assembly close to the described rotation axis of another turning device described and stir adjacent two of assembly it described multiple and stir between assembly.
According to each scheme above-mentioned, described multiple stir assembly each described in stir on one or more blade of assembly or ratchet and scraped parts can be installed, so that mud in corresponding connected entrance or neighbouring can be struck off in the front end of described scraped parts.
According to each scheme above-mentioned, at least one mud turning device described comprises two mud turning devices that the longitudinal direction along described housing is arranged side by side, wherein, each turning device (7a) has rotation axis and is fixed on described rotation axis and multiplely stirs assembly, and at least one connected entrance described comprises multiple connected entrance, wherein, each turning device described multiple stir in assembly have one or more compared with long blade or ratchet to stir assembly corresponding with described multiple connected entrance respectively, so that mud in corresponding connected entrance or neighbouring can be struck off in described one or more front end compared with long blade or ratchet.
According to each scheme above-mentioned, each turning device of described two mud turning devices described multiple stir having in assembly and alternately arrange on described rotation axis compared with the assembly that stirs of short blade or ratchet with having compared with the assembly that stirs of long blade or ratchet, and adjacent two of described multiple a pair of stirring in assembly of one of them turning device stir assembly close to the described rotation axis of another turning device described and be positioned at it described multiplely stir adjacent two of a pair of assembly and stir assembly staggering layout.
According to each scheme above-mentioned, it also comprises air-blast device, and wherein, described air-blast device is communicated with described kiln through at least one connected entrance described.
According to each scheme above-mentioned, it also comprises gas distributing device, and wherein, gas distributing device comprises for the inlet mouth of dry gas and at least one pneumatic outlet.
According to each scheme above-mentioned, it also comprises air-blast device, wherein, described air-blast device is communicated with the described inlet mouth of gas distributing device, and described gas distributing device is communicated with described kiln with at least one connected entrance described through at least one pneumatic outlet described.
According to each scheme above-mentioned, described gas distributing device is arranged in the described space between described housing and ground.
According to each scheme above-mentioned, at least one pneumatic outlet described of gas distributing device comprises multiple pneumatic outlet, and at least one connected entrance described comprises multiple connected entrance, wherein, the quantity of described multiple pneumatic outlet or shape can with the quantity of described multiple connected entrance or shape identical or different.
According to each scheme above-mentioned, it also comprises blower unit, and wherein, described blower unit is communicated with described kiln through described venting port.
According to each scheme above-mentioned, it also comprises heating unit, and wherein, described heating unit is arranged on upstream, the downstream of described air-blast device or is integrally formed with it.
According to each scheme above-mentioned, described base plate comprises upper plate and lower shoe, wherein said upper plate and described lower shoe are formed with the mutually corresponding connected entrance of a part and conduit respectively, when mutually fitting together with the described upper plate of box lunch and described lower shoe, form connected entrance thickness running through described base plate and the passage closed at described base plate interior.
According to each scheme above-mentioned, drying medium is allowed to flow therethrough and have the entrance and exit be communicated with drying medium feedway at the described passage of described base plate.
According to each scheme above-mentioned, in the well-regulated geometrical shape of cross section tool of the described passage of described base plate, the loop pipe for drying medium can be arranged, wherein, described pipe has the import and outlet that are communicated with drying medium feedway.
Accompanying drawing explanation
The structure of preferred embodiment of the present utility model, advantage and technique effect is described in detail below in conjunction with accompanying drawing and specific embodiment, wherein:
Fig. 1 is according to the partial lengthwise sectional view of bottom of the present utility model drying type mud drying device;
Fig. 2 is the transverse sectional view of the mud drying device of Fig. 1;
Fig. 3 is the schematic perspective view of the base plate of turning device in mud drying device and housing;
Fig. 4 is the body of housing and the perspective exploded view for the base plate of boosting;
Fig. 5 is the transverse sectional view of the base plate of Fig. 4;
Fig. 6 is the perspective exploded view of the base plate of Fig. 4;
Fig. 7 is the schematic diagram longitudinally cut open according to the local of another embodiment of bottom of the present utility model drying type mud drying device;
Fig. 8 is the transverse sectional view of the mud drying device of Fig. 7;
Fig. 9 is the schematic perspective view of the gas distributing device in the mud drying device of Fig. 7;
Figure 10 is body, the lid and bottom plate perspective exploded view of the housing in the mud drying device of Fig. 7; And
Figure 11 is the schematic perspective view that the turning device of the mud drying device of Fig. 1 is arranged on above base plate.
Embodiment
Fig. 1 is longitudinal part sectioned view of a preferred embodiment of bottom of the present utility model drying type mud drying device, and Fig. 2 is the transverse sectional view of the bottom drying type mud drying device shown in Fig. 1.Bottom drying type mud drying device 1 comprises housing, turning device 7 and bracing or strutting arrangement 11 generally.Housing comprises body 2, be arranged on upper cover (or lid) 3 on body 2 and base plate 4, and wherein body 2, upper cover 3 form the kiln 6 with certain internal space together with base plate 4.Turning device 7 is arranged in kiln 6, for shearing, broken and stir the mud be deposited on base plate 4.Mud drying device 1 is raised away from ground or the certain distance h of floor B by bracing or strutting arrangement 11.
As shown in the figure, the upper cover 3 of housing is respectively equipped with for introducing to be dried or wanting the opening for feed 8 of dry mud and the venting port 10 for the tail gas after discharging sludge-drying or dry gas, and away from the body 2 near the base plate 4 of opening for feed 8, namely the end wall of kiln is provided with the discharge port 9 for dry mud.In a further embodiment, can as required by be arranged on for the opening for feed 8 of kiln 6 or venting port 10 body 2 and upper cover 3 one of them on optional position, the also optional position of the i.e. upper part of kiln 6.Equally, what discharge port 9 can be arranged on body 2 comprises the circumferential wall of sidewall and end wall or the optional position of base plate, i.e. the circumferential wall of kiln 6 and the optional position of base plate.Base plate 4 is formed at least one connected entrance or through hole 5, and to allow air in air or dry gas below mud drying device 1, namely the bottom of kiln 6 or the base plate 4 of housing enter into kiln 6.As shown in the figure, the bracing or strutting arrangement 11 for support housing is forms of support, and wherein, two supports lay respectively at the two ends of housing and the position be in below base plate 4.In addition, bracing or strutting arrangement also can adopt other supporting way or structure, such as the form such as back up pad, pillar.This configuration causes between the base plate 4 of housing and ground B and occurs certain space, makes air in air not only can unrestricted flow in space, and allows air to be flow in kiln 6 by the connected entrance 5 on base plate 4.The support illustrated can make air enter the space between base plate 4 and ground B from four direction, thus is conducive to air at the flowing underneath of housing and entered in kiln 6 by connected entrance 5.The shape of kiln is rectangular, but also can be square, Polygons, ellipse or other shape.But housing can be formed by multiple parts or constructed in various ways.As shown in the figure, the body 2 of mud drying device 1 and base plate 4 are independent parts respectively, and can by known mode of connection as welding, bolt, riveted joint etc. fit together.In addition, body 2 can with upper cover 3 or base plate 4 integrally formed.
Fig. 3 shows the schematic perspective view of the base plate of turning device and housing, and wherein, in kiln, turning device is positioned at above base plate.The turning device 7 be arranged in kiln 6 has rotation axis 701 and is fixed on rotation axis 701 and stirs assembly 702 for what stir mud.Each rotation axis 701 is provided with and multiplely stirs assembly 702, and each assembly 702 that stirs has four blades or ratchet, therefore, stirs assembly 702 and be similar to water screw on profile, wherein, each blade or ratchet radially stretch out from the axis of rotation axis 701.But, the shape stirring assembly 702 is not limited only to this, those skilled in the art can according to the needs of sludge drying, to assembly 702 be stirred be designed to be similar to the shape of gear, also can arrange on the rotating shaft and one or morely stir assembly 702, and configure one or more blade or ratchet for it.Although blade in the drawings or ratchet are soldered on rotation axis 701, but also can adopt as other fixed form such as bolt, riveted joint, in addition, by blade or ratchet are connected or be fixed on the axle collar, axle sleeve or wheel hub (not shown), afterwards the axle collar etc. can also be installed on the rotating shaft.
As shown in the figure, in kiln 6, base plate 4 forms multiple difform connected entrance 5 arranged spaced apart.The shape of connected entrance 5 can comprise arch 5a, trilateral 5b, rectangle 5c, trapezoidal 5d and Polygons 5e etc., and it also can be erose.In other words, connected entrance 5 does not have shape and quantitative restriction, can determine as required.Multiple connected entrance 5 is arranged to row along the longitudinal direction G of housing on base plate 4, and the length direction of each connected entrance 5 roughly intersects with the longitudinal direction G of housing, preferably mutually vertical.
See Fig. 2 and 3, turning device 7 multiple stir assembly 702 and are arranged to stirring assembly and being alternately arranged successively along rotation axis 701 with the assembly that stirs compared with short blade or ratchet compared with long blade or ratchet, in other words, rotation axis 701 to stir between assembly 702 or in contrast with compared with every two of short blade or ratchet with stirring assembly 702 compared with long blade or ratchet each.Certainly, what turning device 7 can have a different collocation form stirs assembly, and such as, multiple length stirring blade on assembly or ratchet 703 is identical; Multiple stir in assembly with stirring assembly 702 and optionally arranging in an alternating fashion on rotation axis 701 with the assembly 702 that stirs compared with short blade or ratchet compared with long blade or ratchet; The blade or ratchet 703 that assembly can have different lengths or quantity is stirred each.No matter stir assembly how to arrange on the rotating shaft, preferably, have compared with long blade or ratchet to stir assembly 702 mutually corresponding with connected entrance 5.
The two ends of rotation axis 701 are installed in housing respectively by such as bearing (not shown), i.e. in hole 201 in the opposite end walls of body 2.In another embodiment, rotation axis 701 also can be arranged on the supporting device outside the end being arranged at mud drying device 1 through hole 201, such as can at the support (not shown) for support rotating shaft 701 of the arranged outside of the opposite end walls of housing.External impetus equipment can drive turning device 7 by the power input 18 arranged on one end of rotation axis 701.
Flow in kiln in order to accelerate air or dry gas from hull outside, front end turning device 7 can being arranged to make to stir assembly 702 is close to base plate 4 and in the face of connected entrance 5, or the front end compared with long blade or ratchet making to stir on assembly 702 is close to base plate 4 and in the face of connected entrance 5, thus when stirring assembly 702 and rotating together along with rotation axis 701, the mud in connected entrance 5 or near it can be struck off compared with the front end of long blade or ratchet.Stirring, assembly 702 can be one or more compared with the quantity of long blade or ratchet.In other words, stir assembly 702 and preferably there is at least one for striking off comparatively long blade or the ratchet of mud, and also can be insinuated in connected entrance 5 compared with the front end of long blade or ratchet, but can not interfere with connected entrance 5.The quantity of connected entrance 5 can be equal to or less than with the quantity stirring assembly 702 compared with long blade or ratchet, but do not get rid of the quantity of assembly 702 more than connected entrance 5 of stirring yet, and except the effect of striking off, these with compared with long blade or ratchet stir assembly 702 can with compared with short blade or ratchet to stir assembly 702 the same, play to stir, shear and the effect of broken mud.
In another embodiment of turning device 7, stirring on one or more blade on assembly 702 or ratchet 703 of turning device 7, scraped parts 704 can be installed, as shown in Figure 3.When stirring assembly 702 and rotating together along with rotation axis 701, mud in connected entrance 5 or neighbouring can be struck off in the front end of the scraped parts 704 on blade or ratchet 703.Scraped parts 704 can be arranged on any position of blade or ratchet as required, and its front end also can be insinuated in connected entrance 5 or the mud swept near connected entrance 5, and can not interfere with connected entrance 5.Equally, the quantity stirring assembly 702 with scraped parts 704 can be set as required.No matter whether scraped parts 704 are set, do not affect and stir blade on assembly 702 or ratchet 703 stirs, shears and the effect of broken mud.
Fig. 4-6 shows another embodiment of the base plate 4 of housing, and wherein, base plate 4 has effect mud being carried out to drying aid.In the diagram, the base plate 4 of combination also can form multiple difform connected entrance, as irregularly shaped 5a, rectangle 5b, oval 5c, trilateral 5d, tetragon 5e etc., and these connected entrances are arranged to row along the longitudinal direction G of housing and are spaced from each other certain distance.See Fig. 5 and 6, base plate 4 comprises upper plate 4a and lower shoe 4b, wherein upper plate 4a and lower shoe 4b is formed respectively a part for connected entrance and conduit, in other words half connected entrance and half conduit.Connected entrance on two base plates 4a, 4b and the part of conduit corresponding each other, when upper plate 4a and lower shoe 4b fits together, formed as the complete connected entrance 5 on single base plate 4, and there is the complete passage 24A as regular shape of cross sections such as circle, rectangles.The loop pipe 24 being adapted to the shape of passage can be arranged in passage 24A, and with outlet 23b, loop pipe 24 be communicated with drying medium feedway 22 by import 23a.In another embodiment, can guarantee that passage 24A seals by arranging gasket between upper plate 4a and lower shoe 4b, and by corresponding entrance and exit, passage 24A is communicated with drying medium feedway 22.Upper plate 4a after assembling and lower shoe 4b by coupling device as bolt etc. is installed on body 2, in addition, if need to arrange heat insulating mattress (not shown) between body 2 and the base plate 4 of combination, can be delivered on body 2 to prevent heat.
See Fig. 1 and 2, bottom of the present utility model drying type mud drying device 1 can make dry gas such as air enter kiln from the bottom of kiln to realize the drying to mud.Along with mud to be dried is sent in kiln 6 by unshowned e Foerderanlage, external impetus equipment drives rotation axis 701 to rotate by power input 18, and rotation axis drives and stirs assembly 702 and rotate, and then make to stir the blade of assembly or ratchet 703 constantly stirs mud.Stir assembly 702 rotate and shear continuously, broken and while digging mud, at least one stirring on assembly 702 strikes off mud in connected entrance 5 or neighbouring at a certain time interval compared with long blade or ratchet 703 or the front end of scraped parts 704 that is arranged on blade or ratchet.Like this, the air in the space below the base plate 4 of mud drying device 1 enters the speed in kiln 6 through connected entrance 5 and accelerates the effect of the mud in kiln.Enter kiln 6 and carry out tail gas after drying with mud wherein or dry gas flows to venting port 10, be discharged in air afterwards or enter gas treating system to carry out follow-up process.After drying after a while, the water ratio of mud significantly reduces, and mud is after drying discharged from discharge port 9.
If the combination base plate 2 for boosting in employing Fig. 4, then along with the operation of turning device 7, drying medium feedway 22 by be stored in wherein or from the heated drying medium transport in drying medium source to being arranged in the combination import 23a of loop pipe 24 of base plate 2 or the entrance of passage 24A, the combination base plate 2 that heat trnasfer is made to metallic substance by the heated drying medium flowing through loop pipe 24, heated drying medium turns back to drying medium feedway 22 from the outlet 23b of loop pipe 24 or the outlet of passage 24A afterwards.Drying medium feedway 22 such as can comprise pump or motor.Drying medium feedway 22 can make the loop pipe 24 of heated drying medium in base plate 2 or constantly circulate between passage 24A and drying medium source, and heated drying medium can be gas or liquid.Along with heated drying medium enters into loop pipe 24 or the passage 24A of combination base plate 2, heat is delivered to stacking mud on a base plate 2 indirectly by combination base plate 2, thus turning device 7 the shearing stirring assembly 702, fragmentation and stir mud, entered the effect of the base plate 2 of dry gas in kiln 6 and heating by the connected entrance 5 of base plate 2 under, accelerate the drying of the mud in kiln.In addition, by heat insulating mattress, base plate 4 and body 2 can be carried out thermal isolation, to prevent heat to be delivered on body 2, thus mud heat being concentrated pass to base plate 2 and stack on a base plate 2.
Because bottom of the present utility model drying type mud drying device 1 is provided with connected entrance 5 on the base plate 4 of the bottom of kiln 6 also i.e. housing, and strike off mud in connected entrance 5 or near it by least one stirring on assembly 702 of turning device 7 compared with long blade or ratchet or the front end of scraped parts 704 that is arranged on blade or ratchet, dry gas can be discharged from top through mud swimmingly from the bottom of mud drying device 1 or base plate 4.The prior art that this mode is completely different from the past, first, method of the present utility model and common compared with hot gas from similar to the phenomenon flowed in the air ground, by means of bracing or strutting arrangement 11, mud drying device 1 is raised from ground B, there is certain space between base plate 4 and ground B, thus in space below flowing air can from the bottom natural of mud drying device 1 connected entrance 5 through base plate 4 flow in kiln 6.Secondly, the utility model change in the past from top to the mud in kiln blow dry gas or by pressurized gas by force from the traditional drying mode that the bottom of device is carried.Blow dry gas from top, can only the upper surface of sludge-drying layer, and from the bottom of device by force transporting compressed gas body only to desiccation a fraction of basal surface of the sludge blanket of lay.Method of the present utility model is that the dry gas such as air making to enter through connected entrance 5 interacts with the mud stirred; to improve the frequency that dry gas contacts with mud; and; stir while assembly stirs mud at turning device; stir the blade on assembly or ratchet is sheared the block of mud or fragment and broken, and then the granularity of mud is diminished and powder gradually.Particularly, continue compared with the front end of long blade or ratchet or the front end of scraped parts 704 that is arranged on blade or ratchet or strike off mud in the connected entrance 5 of base plate 4 or neighbouring discontinuously, make air enter kiln 6 and pass mud and interact with it to become more easy, thus the chance that mud and air are directly contacted significantly increases.Along with mud granularity constantly change and the raising of drying sludge degree facilitates the flowing of dry gas by connected entrance, thus shorten the time of sludge drying.This method changes the mode of in the past only carrying out partial drying at the upper surface of sludge blanket or basal surface, and drying sludge efficiency is significantly improved.When adopting the combination base plate 4 being used for boosting, the acting in conjunction of air to the mud indirect heating that the heated drying media stack flowed in the direct effect of mud and base plate is placed on base plate entering connected entrance 5 further shorten the time of sludge drying.In addition, stir on assembly 702 at least one compared with long blade or ratchet or the front end that is arranged on the scraped parts 704 on blade or ratchet in connected entrance 5 or near carry out in abrading process, some mud possible drops to the B of ground from connected entrance 5, therefore, the space between base plate 4 and ground B also contributes to disposing the mud fallen earthward on B.
Fig. 7 and 8 shows another preferred embodiment of bottom of the present utility model drying type mud drying device 1, wherein represents this improved plan with longitudinal part sectioned view and transverse sectional view respectively.Represent with the same Reference numeral of the same or similar parts of the embodiment shown in Fig. 1 and 2 in Fig. 7 and 8, therefore, the structure of these parts, shape and function applicant repeat no more, and only describe different parts or device.
As mentioned above, mud drying device 1 utilizes the connected entrance 5 formed on the bottom of kiln 6 or base plate 4 to make dry gas enter kiln 6 and contacts with mud, and, by the mud in the connected entrance 5 striking off on base plate 4 compared with long blade or ratchet or the front end of scraped parts that is arranged on blade or ratchet stirring on assembly 702 that is arranged on turning device 7 in kiln 6 or near it, make extraneous air flow into kiln 6 by connected entrance 5 and become more smooth and easy, and then increase the contact frequency of gas and mud.Although this method has good drying effect for prior art, still need further improvement.Entering the speed of kiln to improve dry gas, can be bottom drying type mud drying device 1 configuration air-blast device 12, blower unit 13, gas distributing device 14 or heating unit in addition.
As shown in FIG. 7 and 8, gas distributing device 14 is arranged in the space of the below of mud drying device 1, in the space below the base plate 4 of also i.e. housing, and is supported by bracing or strutting arrangement, but also can be suspended on the base plate 4 of housing by suspension bracket (not shown).Gas distributing device 14 in casing form, and forms the inlet mouth 15 for receiving dry gas on its side plate, and plate is formed the pneumatic outlet 16 for dry gas of providing and delivering thereon.The pneumatic outlet 16 of gas distributing device 14 can be formed in upper surface except it or top panel, any position namely beyond the surface of base plate 4, and can have different shape.Inlet mouth 15 also can be arranged on other position.
Fig. 9 shows a preferred embodiment of gas distributing device, and Figure 10 shows a preferred embodiment of housing.As shown in the figure, gas distributing device 14 is rectangular parallelepiped and surface or top panel forms the pneumatic outlet 16 of various shape thereon, and it comprises trapezoidal 16a, rectangle 16b, trilateral 16c, and arch door shape, circle or Polygons (not shown) etc.Each shape of these pneumatic outlets all corresponds to each other with the shape of the connected entrance 5 shown in Figure 10, and is communicated with pneumatic outlet 16 by corresponding connected entrance by conduit or pipeline 17.Therefore, connected entrance 5 can be made corresponding with the shape of corresponding connected entrance and pneumatic outlet with the cross-sectional shape of each pipeline 17 of pneumatic outlet 16, so that dry gas can enter in kiln 6 through connected entrance 5 swimmingly.In addition, pipeline 17 also can the same form adopting flexible duct of image tube road 12a with 13a, difform connected entrance and pneumatic outlet can be connected, and it is corresponding also the cross-sectional shape of one end of pipeline 17 can be made with pneumatic outlet 16, and it is corresponding to be made by the cross-sectional shape of the other end of pipeline 17 with connected entrance 5.In another embodiment, a flexible manifold road can be used to substitute gas distributing device 14, and substitute pipeline 17 with the other flexible arm corresponding with the quantity of the connected entrance 5 on base plate 4, this can play the effect of carrying dry gas to kiln 6 equally.In addition, gas distributing device 14 also can be arranged on other place beyond the space between housing and ground, and can have other shapes such as cylindrical shell, tank body, spheroid.
See Fig. 8, mud drying device 1 can be included in the unshowned air-blast device 12 of Fig. 7, wherein, air-blast device 12 is communicated with gas distributing device 14 with inlet mouth 15 through pipeline 12a, to be transported to by dry gas in gas distributing device 14, and through the pneumatic outlet 16 of gas distributing device 14 and connected entrance 5, dry gas is entered in kiln 6.Air-blast device 12 can be used for accelerating the flowing of dry gas.Equally, mud drying device 1 can also comprise blower unit 13, and wherein, blower unit 13 is communicated with kiln 6 with the venting port 10 on the top being positioned at housing through pipeline 13a.Blower unit 13 can accelerate the speed that tail gas flows out from kiln 6.Being transported to gas distributing device 14 and the dry gas entered in kiln 6 can be drying medium as hot gas, gas, warm air, gas at normal temperature or frozen gas etc. containing chemical substance, also can be the drying medium of formulated.Typically, air-blast device can be gas blower or fan, and blower unit can be induced draft fan.In addition, air-blast device 12 can be substituted with supercharging device, so that dry gas is transported to gas distributing device 14 with certain pressure, thus make dry gas accelerate to flow into kiln 6.Equally, also can substitute blower unit 13 to accelerate the flowing of tail gas with reliever, thus improve sludge drying efficiency.
For the mud needing to utilize hot drying gas dry, heating unit (not shown) can be set, to heat the dry gas be transported in kiln 6.Heating unit can be arranged on separately upstream position or the downstream position of air-blast device, also can integrate with air-blast device, to be transported in gas distributing device 14 by the dry gas of heating.
As shown in the figure, arrange two for stirring the turning device of mud in kiln 6, wherein, the first turning device 7a and the second turning device 7b is arranged parallel to each other along the longitudinal direction G of housing.First turning device 7a comprises and is arranged on first on the first rotation axis 701a and stirs assembly 702a, and the second turning device 7b comprises and is arranged on second on the second rotation axis 701b and stirs assembly 702b, and first stirs assembly 702a and second and stirs assembly 702b staggered arrangement each other, namely also the first front end stirring assembly 702a is stirred between assembly 702b close to the second rotation axis 701b at two adjacent second, otherwise and also like this, both the between centers between the first rotation axis 701a and the second rotation axis 701b can have been shortened, also can avoid occurring between the two interfering.
Figure 11 shows the preferred embodiment arranging two turning devices in kiln, wherein, at each turning device 7a, in 7b, at rotation axis 701a, multiple on 701b stir assembly 702a, adjacent two in 702b to stir assembly be one group, and two of stirring in assembly have comparatively long blade or ratchet or be provided with scraped parts 704, and another has comparatively short blade or ratchet, wherein, often group on the first rotation axis 701a often group stirred on assembly 702a and the second rotation axis 701b stirs that assembly 702b is interlaced to be opened, making on the first rotation axis 701a one group first to stir assembly 702a stirs between assembly 702b close to the second rotation axis 701b at adjacent two group second, thus the distance reduced between the first rotation axis 701a and the second rotation axis 701b.Certainly, the utility model is not limited to this layout stirring assembly, such as, also three adjacent assemblies that stir can be adopted on identical rotation axis to be one group, wherein one or two stirs assembly with comparatively long blade or ratchet or be provided with scraped parts 704, or each on two rotation axiss to stir assembly interlaced with each other.Stir assembly configuration on the rotating shaft and can adopt various forms, no longer enumerate at this.But, no matter stirring assembly adopts which kind of to arrange on the rotating shaft, but all should ensure major part with compared with long blade or ratchet or be provided with scraped parts 704 to stir assembly 702a, 702b corresponding with connected entrance 5, namely guarantee to strike off mud in connected entrance 5 or neighbouring, flow into kiln 6 swimmingly to make gas.Therefore, the distribution of the connected entrance 5 on base plate 4 should with compared with long blade or ratchet or be provided with scraped parts 704 to stir assembly 702a and 702b corresponding roughly each other.As shown in the figure, multiple connected entrance is arranged to two rows, and often in row multiple connected entrances 5 of gap-forming at a certain distance respectively with two turning devices be arranged side by side with compared with long blade or ratchet or be provided with scraped parts 704 to stir assembly 702a and 702b mutually corresponding.The length direction of each connected entrance intersects mutually with the axial direction due of the rotation axis of turning device, preferably perpendicular to one another, to stir assembly 702a, 702b can strike off mud in connected entrance or neighbouring compared with long blade or ratchet 703 or the front end of scraped parts 704 that is arranged on blade or ratchet.In addition, as required, a part of width that assembly 702a, 702b only can cover connected entrance is stirred, it to strike off the mud near connected entrance compared with long blade or ratchet 703 or the fore-end of scraped parts 704 that is arranged on blade or ratchet.
The two ends of each rotation axis 701a, 701b are installed in respectively by such as bearing (not shown) in hole 201a, the 201b in the opposite end walls of housing, and the power input be provided with on one end of rotation axis 701a, 701b, such as power input 18a.Can external impetus device drives transmission mechanism be passed through, and drive power input and rotation axis 701a, 701b to rotate successively by transmission mechanism.First rotation axis 701a and the second rotation axis 701b both inwardly can rotate relative to each other and also can outwards rotate relative to each other.Equally, the shape of connected entrance 5 does not limit, and can be arbitrary, and, connected entrance 5 is arranged to two rows, and in each row connected entrance 5 quantity can with compared with long blade or ratchet or to be provided with the quantity stirring assembly 702a, 702b of scraped parts 704 identical or different.In addition, can determine that turning device 7a, 7b's stirs assembly 702a, 702b interval on rotation axis 701a, 701b according to the distance that is spaced of the multiple connected entrances on the base plate 4 of housing, to ensure when rotation axis rotates, in each front end scraped connected entrance 5 stirring the front end compared with long blade or ratchet 703a, 703b on assembly 702a, 702b or be arranged on scraped parts 704a, 704b on blade or ratchet 703a, 703b or neighbouring mud.In other words, the position of connected entrance on base plate with stir assembly position on the rotating shaft and be associated.
See Fig. 7 and 8, similar with the bottom drying type mud drying device 1 in Fig. 1 and 2, this improved plan can make dry gas enter kiln from the bottom of kiln equally, but better to the drying effect of mud.When configuring air-blast device 12, external impetus drives turning device 7a, 7b, wherein, rotation axis 701a, 702b drive and stir assembly 702a, 702b rotation, and then impel each blade or ratchet constantly to shear, stir and broken mud, and at least one stirring on assembly 702a, 702b strikes off mud in connected entrance 5 on the other side or neighbouring compared with long blade or ratchet 703a, 703b or the front end that is arranged on scraped parts 704a, 704b on blade or ratchet by certain time interval.Meanwhile, dry gas is blown in gas distributing device 14 through piping 12a by air-blast device 12, and dry gas is assigned with and arrives corresponding connected entrance 5 by corresponding pipeline 17 from the pneumatic outlet 16 of gas distributing device 14 thus.Under the effect of air-blast device, dry gas enters the flow faster of kiln 6 through connected entrance 5, thus is conducive to the drying of dry gas to mud, shortens the time of drying of mud.When configuring blower unit 13, complete the flow faster that the tail gas of dry work or dry gas leave kiln 6 under the effect of blower unit 13, serve equally and accelerate the effect that contacts with mud of dry gas, and exhaust treatment system can be transported to from the tail gas of venting port 10 discharge and carry out subsequent disposal.When configuring heating unit, before dry gas enters into gas distributing device 14, it is heated, to utilize hot drying gas to carry out drying to the mud in kiln 6.By the effect of hot drying gas to mud, the moisture in mud is evaporated with the drying accelerating mud, and this is conducive to the efficiency improving drying sludge equally.Therefore, the configuration of each device above-mentioned further increases sludge drying efficiency.Be understandable that, as required, air-blast device 12, blower unit 13 and heating unit both can configure separately also can combining and configuring.Equally, base plate 4 can replace with the combination base plate 2 for boosting as shown in Figure 4, thus improves the drying efficiency of mud further.
In addition, due to stir on assembly 702 compared with long blade or ratchet or in being fixed on blade or ratchet scraped parts 704 pairs of connected entrances 5 or neighbouring cleaning, make a part of mud to drop from connected entrance 5 or to leak into gas distributing device 14.Therefore, at gas distributing device 14 below the B of ground or clean-up port 14a lower panel is provided with for removing the mud dropping or leak into wherein, to avoid dry mud alluvial in gas distributing device 14, thus ensure that the flowing of the gas in gas distributing device 14 is unimpeded.In order to ensure the opposing seal in gas distributing device 14, movable baffle plate can being set at 14a place, clean-up port, to make dry gas not leak, and when discharging mud, shifting board being opened.
Moreover, as illustrated in figures 1 and 7, in order to contribute to the drying effect improving mud, advantageously the opening for feed 8 on upper cover 3 is arranged to the one end near mud drying device 1, and the discharge port 9 on body 2 is arranged to the other end close to mud drying device 1, and venting port 10 is arranged to contiguous opening for feed 8, and turning device 7 or 7a, 7b adopt a kind of turning device that not only can stir mud but also can promote mud movement on the longitudinal direction G of housing.Like this, carry out drying treatment along with the high mud of water ratio mud also namely to be dried is transported to kiln 6 from opening for feed 8 and enters progressively dry to mud of dry gas in kiln by connected entrance 5, the water ratio of mud can reduce gradually, and turning device 7 is stirring, shearing and also progressively push mud to discharge port 9 while broken mud.So, the mud the closer to discharge port 9 is drier, and just becomes very smooth and easy during the connected entrance 5 of dry gas near it.Therefore, the gas of the connected entrance 5 near discharge port 9, carrying out further drying to the surface of mud on the longitudinal direction G of mud drying device 1 through after dried mud, thus, extends the duration of contact of gas and mud.
Although list preferred embodiment multiple in this application, but the utility model is not limited only to the content arrived mentioned by specification sheets, those skilled in the art completely can be changed all parts in the drying type mud drying device of bottom of the present utility model or device and retrofit by above-mentioned design philosophy of the present utility model, and these changes or remodeling are all within concept of the present utility model.
Claims (18)
1. a bottom drying type mud drying device, described mud drying device comprises:
Housing, wherein, the space in described housing forms the kiln in order to dewatered sludge;
Be arranged at least one the mud turning device in described kiln, wherein, at least one mud turning device described comprises rotation axis and at least one being fixed on described rotation axis stirs assembly;
Be arranged on the upper part of described kiln for the opening for feed of mud to be dried and the venting port for discharging the dry gas after sludge-drying, and be arranged on the discharge port for dried mud on the circumferential wall of described kiln; And
Be formed at least one connected entrance on the base plate of described housing, to allow the dry gas outside housing to enter described kiln, wherein, described at least one stir assembly and can strike off mud at least one connected entrance described or neighbouring; And
Support the bracing or strutting arrangement of described housing, described bracing or strutting arrangement makes described base plate leave ground certain distance, to have certain space between described housing and base plate.
2. mud drying device according to claim 1, is characterized in that, at least one connected entrance described on described base plate has rule or irregular shape.
3. mud drying device according to claim 1, it is characterized in that, at least one mud turning device described described at least one stir assembly and there is at least one blade or ratchet of extending radially outwardly from described rotation axis, for stirring, shearing and broken mud.
4. the mud drying device according to any one of claim 1-3, it is characterized in that, described at least one stir assembly in the face of at least one connected entrance described, so that the front end of at least one at least one blade described or ratchet stirring assembly described can be struck off or part strikes off mud at least one connected entrance described or neighbouring.
5. mud drying device according to claim 4, it is characterized in that, described at least one stir assembly in the face of at least one connected entrance described so that at least one front end stirring the scraped parts that at least one blade described in assembly or ratchet are installed described can strike off part is struck off at least one connected entrance described or near mud.
6. mud drying device according to claim 1, it is characterized in that, at least one connected entrance described comprises multiple connected entrance, wherein, described multiple connected entrance is arranged at certain intervals on the longitudinal direction of described housing, and the length direction of each connected entrance intersects with the longitudinal direction of described housing or vertical.
7. mud drying device according to claim 6, it is characterized in that, at least one mud turning device described comprises and multiplely stirs assembly, wherein, described multiple assembly that stirs is arranged at certain intervals on described rotation axis, and at least one stirs assembly at least one connected entrance in described multiple connected entrance, so as described in stir assembly the front end of at least one blade or ratchet can to strike off or part strikes off mud in corresponding connected entrance or neighbouring.
8. mud drying device according to claim 7, is characterized in that, at least one front end stirring the scraped parts that at least one blade of assembly or ratchet are installed described can be struck off or part strikes off mud in corresponding connected entrance or neighbouring.
9. mud drying device according to claim 8, is characterized in that, describedly multiplely stirs the quantity of assembly and the not identical of described multiple connected entrance.
10. mud drying device according to claim 7, it is characterized in that, described some stirring in assembly multiple are stirred assembly and are had longer blade or ratchet, and other stir assembly and have shorter blade or ratchet, and at least one connected entrance described comprises multiple connected entrance, wherein, the assembly that stirs with longer blade or ratchet is alternately arranged on described rotation axis with the assembly that stirs with shorter blade or ratchet, and have that to stir assembly described in longer blade or ratchet corresponding with described multiple connected entrance respectively, so that mud in corresponding connected entrance or neighbouring can be struck off in the front end of described longer blade or ratchet.
11. mud drying devices according to claim 1, it is characterized in that, at least one mud turning device described comprises two mud turning devices that the longitudinal direction along described housing is arranged side by side, wherein, each turning device has rotation axis and is fixed on described rotation axis and multiplely stirs assembly, and at least one connected entrance described comprises multiple connected entrance, wherein, it is corresponding with described multiple connected entrance respectively that each turning device described multiple stir assembly, so that described multiple stir assembly each described in stir one or more blade on assembly or ratchet front end can strike off mud in corresponding connected entrance or neighbouring.
12. mud drying devices according to claim 11, it is characterized in that, one of them turning device in described two mud turning devices described multiple stir assembly and the described multiple of another turning device stir assembly staggered arrangement, wherein, described multiple of stirring in assembly of one of them turning device described stir assembly close to the described rotation axis of another turning device described and stir adjacent two of assembly it described multiple and stir between assembly.
13. mud drying devices according to claim 11 or 12, it is characterized in that, described multiple stir assembly each described in stir on one or more blade of assembly or ratchet and scraped parts can be installed, so that mud in corresponding connected entrance or neighbouring can be struck off in the front end of described scraped parts.
14. mud drying devices according to claim 12, it is characterized in that, each turning device described multiple stir in assembly have one or more compared with long blade or ratchet to stir assembly corresponding with described multiple connected entrance respectively, so that mud in corresponding connected entrance or neighbouring can be struck off in described one or more front end compared with long blade or ratchet.
15. mud drying devices according to claim 12, it is characterized in that, each turning device of described two mud turning devices described multiple stir having in assembly and alternately arrange on described rotation axis compared with the assembly that stirs of short blade or ratchet with having compared with the assembly that stirs of long blade or ratchet, and adjacent two of described multiple a pair of stirring in assembly of one of them turning device stir assembly close to the described rotation axis of another turning device described and be positioned at it described multiplely stir adjacent two of a pair of assembly and stir assembly staggering layout.
16. mud drying devices according to claim 1,6 or 11, it is characterized in that, it also comprises air-blast device, and wherein, described air-blast device is communicated with described kiln through at least one connected entrance described.
17. mud drying devices according to claim 1,6 or 11, it is characterized in that, it also comprises blower unit, and wherein, described blower unit is communicated with described kiln through described venting port.
18. mud drying devices according to claim 1,6 or 11, it is characterized in that, it also comprises heating unit, and wherein, described heating unit is arranged on upstream, the downstream of air-blast device or is integrally formed with it.
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| CN201520008594.0U CN204779275U (en) | 2015-01-07 | 2015-01-07 | Dry formula sludge drying device in bottom |
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| CN201520008594.0U CN204779275U (en) | 2015-01-07 | 2015-01-07 | Dry formula sludge drying device in bottom |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016110212A1 (en) * | 2015-01-07 | 2016-07-14 | 广州新致晟环保科技机械设备有限公司 | Sludge drying system and method |
| WO2016110222A1 (en) * | 2015-01-07 | 2016-07-14 | 广州新致晟环保科技机械设备有限公司 | Bottom-drying sludge drying device and method |
| WO2016110213A1 (en) * | 2015-01-07 | 2016-07-14 | 广州新致晟环保科技机械设备有限公司 | Sludge drying system and method |
| WO2016110220A1 (en) * | 2015-01-07 | 2016-07-14 | 广州新致晟环保科技机械设备有限公司 | Stirring device and drying device for sludge drying device |
| CN108947166A (en) * | 2018-08-14 | 2018-12-07 | 占学宽 | A kind of Manure treatment method in pig farm |
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2015
- 2015-01-07 CN CN201520008594.0U patent/CN204779275U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016110212A1 (en) * | 2015-01-07 | 2016-07-14 | 广州新致晟环保科技机械设备有限公司 | Sludge drying system and method |
| WO2016110222A1 (en) * | 2015-01-07 | 2016-07-14 | 广州新致晟环保科技机械设备有限公司 | Bottom-drying sludge drying device and method |
| WO2016110213A1 (en) * | 2015-01-07 | 2016-07-14 | 广州新致晟环保科技机械设备有限公司 | Sludge drying system and method |
| WO2016110220A1 (en) * | 2015-01-07 | 2016-07-14 | 广州新致晟环保科技机械设备有限公司 | Stirring device and drying device for sludge drying device |
| CN108947166A (en) * | 2018-08-14 | 2018-12-07 | 占学宽 | A kind of Manure treatment method in pig farm |
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