Screw conveyor for sewage sludge

Abstract

A screw conveyor device for sewage sludge, characterized in that the device comprises a housing for the screw conveyor of sewage sludge, wherein the housing for the screw conveyor of sewage sludge is mounted on a support frame for sewage sludge, and screw conveyors for conveying and mixing the sewage sludge are arranged in the housing for the screw conveyor of sewage sludge; at least two screw conveyors are arranged; the screw conveyors are connected to rotary axes, both ends of the rotary axes are guided through side walls of the housing for the screw conveyor of sewage sludge and are rotatably connected to the side walls of the housing for the screw conveyor of sewage sludge via bearings; and a stirring and conveying mechanism for feeding the sewage sludge to be treated into the sewage sludge screw conveying housing is arranged at one end of the sewage sludge screw conveying housing.

Description

Technical FieldThe present invention relates to the field of sewage sludge treatment, in particular to a screw conveyor for sewage sludge.Prior ArtSewage sludge refers to solid residues formed in water treatment processes and are usually by-products of waste water treatment, industrial waste water treatment or other types of water treatment. The composition of the sewage sludge is complex and comprises mainly moisture, organics, inorganics, bacteria as well as other microorganisms. Depending on the origin, one differentiates among other things active sludge: it is formed during the biological treatment process in wastewater treatment plants, contains a large amount of microorganisms and has a good capacity for degrading organic substances. Moreover, organic sedimentation sludge is a solid substance which is separated by sedimentation during the treatment process; it can be used as fertilizer, soil improver, etc. Currently, conveying devices used for transporting sludge are all operated on the principle of "single-shaft screw conveying". This type of conveyance has the disadvantage, among other things, that the conveying capacity is low, and moreover, blockages easily occur in the screw conveying tubes, and at the same time a great amount of time has to be used for the decongestion.Content of the Utility ModelThe purpose of the present invention is achieved by the following technical solutions:A sewage sludge screw conveying device comprises a sewage sludge screw conveying housing, wherein the sewage sludge screw conveying housing is mounted on a sewage sludge supporting framework, and screw conveyors for conveying and mixing the sewage sludge are disposed in the sewage sludge screw conveying housing; at least two screw conveyors are disposed; the screw conveyors are connected to rotation axes, both ends of the rotation axes are respectively passed through side walls of the sewage sludge screw conveying housing and rotatably connected to the side walls of the sewage sludge screw conveying housing via bearings; and a stirring and conveying mechanism for supplying the sewage sludge to be treated into the sewage sludge screw conveying housing is disposed at one end of the sewage sludge screw conveying housing.Preferably, the stirring and conveying mechanism comprises a stirring housing; the stirring housing is disposed at an end of the housing for screw conveying sewage sludge and anchored to the ground via supports; and a stirring shaft for mixing the sewage sludge to be treated is disposed in the stirring housing.Preferably, one end of the stirring shaft is rotatably passed through a bottom of the stirring case via a bearing, the shaft end is mounted on an output shaft of a stirring drive motor, and the stirring drive motor is mounted and connected to the bottom of the stirring case; and a plurality of stirring blades for mixing the sewage sludge to be treated are mounted and connected to the stirring shaft.Preferably, ends of the rotating axes of the screw conveyors near the agitating housing are connected to screw conveying drive motors for moving the screw conveyors, and the screw conveying drive motors are mounted and connected to the side walls of the housing for screw conveying sewage sludge;Preferably, an insulation case for supplying the sewage sludge into the agitation case is disposed on a side of the agitation case opposite to the case for screw conveyance of sewage sludge, wherein a conveyance pipe for supplying the sewage sludge into the insulation case is mounted and connected to a bottom of the insulation case, and a sewage sludge pump for conveying the sewage sludge into the insulation case is mounted and connected to the conveyance pipe; the agitation case and the insulation case are continuously connected to each other; and an insulation plate for blocking the sewage sludge is mounted in the insulation case, both sides of the insulation plate sealingly contact inner side walls of the insulation case, and a bottom of the insulation plate sealingly contacts an inner bottom of the insulation case.Preferably, a side of the agitation housing facing the sewage sludge screw conveying housing is connected to the sewage sludge screw conveying housing via a piping, wherein a pump for conveying the sewage sludge to be treated from the agitation housing through the piping into the sewage sludge screw conveying housing is mounted and connected to the piping.Preferably, a passage opening for discharging the sewage sludge to be treated is provided at an end of the housing for conveying sewage sludge in a worm facing away from the agitating housing, and a chute is mounted and connected to an outer wall of the passage opening.The advantageous effect of the present invention is that the object of the present invention is to provide a screw feeder for sewage sludge. This screw conveyor was structurally improved as compared with the original structure by converting the original single-shaft screw conveyor structure into a "multi-shaft" conveyor structure. Moreover, the original screw conveying pipe was reformed into a housing structure. These structural improvements of the screw conveyor device significantly increased the efficiency of the sewage sludge conveyance, reduced the problem of pipe plugging and saved the time for pipe cleaning.DESCRIPTION OF THE ACCOMPANYING DRAWINGSFIG. 1 is a schematic view showing the overall connection structure of a sewage sludge screw conveyor according to the present invention; FIG. 2 is a schematic diagram showing the connection structure of a sewage sludge screw conveying body of the sewage sludge screw conveying apparatus according to the present invention; and FIG. 3 is a schematic diagram showing the connection structure of a stirring body of the sewage sludge screw conveying apparatus according to the present invention.In the figures: 1-housing for screw conveyance of sewage sludge; 2-screw conveyor; 3-agitation housing; 4-insulation housing; 11-chute; 31 agitation shaft; and 41 insulation plate.Exemplary EmbodimentsIn order to more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be described below in more detail with reference to the accompanying drawings and embodiments.As shown in FIGS. 1 to 3, a sewage sludge screw conveying device is a constructional improvement over the original structure in which the original single-shaft screw conveying structure is converted into a "multi-shaft" conveying structure; and the original screw conveying pipe is reformed into a housing structure.The structurally improved screw conveying device comprises a housing for the screw conveying of sewage sludge 1. The sludge support structure stably supports the sewage sludge screw conveying case 1. in the sewage sludge screw conveying case 1, screw conveyors 2 (present helical screw structure) for conveying and mixing the sewage sludge are disposed, and at least two screw conveyors 2 are disposed. The screw conveyors 2 are connected to rotation axes. Both ends of the rotation axes are each passed through side walls of the housing for the screw conveyance of sewage sludge 1 and rotatably connected to the side walls of the housing for the screw conveyance of sewage sludge 1 via bearings. A stirring and conveying mechanism for supplying the sewage sludge to be treated into the sewage sludge screw conveying case is disposed at one end of the sewage sludge screw conveying case 1.In the exemplary embodiment, the sewage sludge to be treated is conducted into the stirring and conveying mechanism and mixed in order to ensure thorough mixing of the sewage sludge to be treated. Subsequently, the mixed sewage sludge is conveyed from the stirring and conveying mechanism through the stirring and conveying mechanism into the sewage sludge screw conveying housing 1. By activating the screw conveyors 2, the mixed sewage sludge is transported to the next processing step for further processing (e.g. filtration and separation). Since the mixed sewage sludge is present in a "viscous state", the arrangement of the "multi-shaft" screw conveyors 2 enables rapid conveyance. By mounting the "multi-shaft" screw conveyors 2 in the housing for the screw conveyance of sewage sludge 1, instead of the original arrangement of a single-shaft screw conveyor in a conveying line, the probability of pipe plugging is reduced, which reduces much time that would be expended for the cleaning due to pipe plugging, saves time and improves the conveying efficiency.Further, the stirring and conveying mechanism includes a stirring housing 3, the stirring housing 3 being disposed at an end of the housing for screw conveying sewage sludge 1 and anchored to the ground through supports; and a stirring shaft 31 for mixing the sewage sludge to be treated being disposed in the stirring housing 3. One end of the stirring shaft 31 is rotatably passed through a bottom of the stirring case 3 via a bearing, the shaft end is mounted on an output shaft of a stirring drive motor, and the stirring drive motor is mounted and connected to the bottom of the stirring case 3. A plurality of agitating blades for agitating the sewage sludge to be treated are mounted on and connected to the agitating shaft 31. Ends of the rotation axes of the screw conveyors 2 near the agitating housing 3 are connected to screw conveying drive motors for moving the screw conveyors 2, and the screw conveying drive motors are mounted and connected to the side walls of the sewage sludge screw conveying housing 1.At the same time, an insulation case 4 for supplying the sewage sludge into the agitation case is disposed on a side of the agitation case 3 opposite to the case for the screw conveyance of sewage sludge 1, a conveyance pipe for supplying the sewage sludge into the insulation case 4 is mounted and connected to a bottom of the insulation case 4, and a sewage sludge pump for conveying the sewage sludge into the insulation case 4 is mounted and connected to the conveyance pipe; the agitation case 3 and the insulation case 4 are continuously connected to each other; and an insulation plate 41 for blocking the sewage sludge is mounted in the insulation case 4, both sides of the insulation plate 41 are sealingly in contact with inner side walls of the insulation case 4, and a bottom of the insulation plate 41 is sealingly in contact with an inner bottom of the insulation case 4.In the exemplary embodiment, the sewage sludge to be treated is conveyed into the insulating housing 4 by controlling the sewage sludge pump. The sewage sludge then enters the agitation housing 3 through the through-opening of the insulation housing 4, and by controlling the drive of the agitation drive motor, the agitation shaft 31 is driven and rotated to further drive the agitation blades on the agitation shaft 31 to thoroughly mix the sewage sludge in the insulation housing 4, and the water content in the sewage sludge mixed thereafter flows through the drainage openings formed in the insulation plate 41 into the insulation housing 4 on the side of the insulation plate 41 remote from the agitation housing 3 and is supplied to the sewage purification through the water outlet at the bottom of this side of the insulation housing 4. The sewage sludge present after mixing and after "separation of sludge and water" is then conveyed into the sewage sludge screw conveying housing 1 and transported through the sewage sludge screw conveying housing 1 over a long distance for further processing and treatment in the next process.Further, a side of the agitation housing 3 facing the sewage sludge screw conveying housing 1 is connected to the sewage sludge screw conveying housing 1 via a piping, and a pump for conveying the sewage sludge to be treated from the agitation housing 3 through the piping into the sewage sludge screw conveying housing 1 is mounted and connected to the piping. At the same time, a passage for discharging the sewage sludge to be treated is provided at an end of the sewage sludge screw conveying casing 1 remote from the agitating casing 3, and a chute 11 is mounted and connected to an outer wall of the passage.In the embodiment, the sewage sludge present after mixing is fed by the pump into the sewage sludge screw feeding housing 1, then the respective screw feeders 2 are started to enable the sewage sludge screw feeding housing 1 by the provided arrangement to feed the "viscous state of the sewage sludge" over a long distance, transport it to the next process position, and the sewage sludge passes through the passage hole provided at this end of the sewage sludge screw feeding housing 1, falls into the provided chute 11, and is transported through the chute 11 to the apparatus at this position for further processing and treatment.The improved screw conveyor device significantly increases the efficiency of the sewage sludge conveyance, reduces the lack of pipe blockages and saves the time for the cleaning of the lines.The preferred embodiments of the present invention have been described above in detail with reference to the accompanying drawings. However, all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the present invention. At the same time, the various embodiments of the present invention can be combined arbitrarily as long as they do not violate the spirit of the present invention, and should also be considered as disclosed contents of the present invention.

Claims

A sewage sludge screw conveying device, characterized in that the device comprises a sewage sludge screw conveying housing, wherein the sewage sludge screw conveying housing is mounted on a sewage sludge supporting framework, and screw conveyors for conveying and mixing the sewage sludge are disposed in the sewage sludge screw conveying housing; at least two screw conveyors are disposed; the screw conveyors are connected to rotation axes, both ends of the rotation axes are respectively passed through side walls of the sewage sludge screw conveying housing and rotatably connected to the side walls of the sewage sludge screw conveying housing via bearings; and a stirring and conveying mechanism for supplying the sewage sludge to be treated into the sewage sludge screw conveying housing is disposed at an end of the sewage sludge screw conveying housing.The sewage sludge screw conveying device according to claim 1, characterized in that the stirring and conveying mechanism comprises a stirring housing; the stirring housing is disposed at an end of the sewage sludge screw conveying housing and is anchored to the ground via supports; and a stirring shaft for mixing the sewage sludge to be treated is disposed in the stirring housing.The sewage sludge screw conveying device according to claim 2, characterized in that one end of the stirring shaft is rotatably passed through a bottom of the stirring housing via a bearing, the shaft end is mounted on an output shaft of a stirring drive motor, and the stirring drive motor is mounted and connected to the bottom of the stirring housing; and a plurality of stirring blades for mixing the sewage sludge to be treated are mounted and connected to the stirring shaft.The sewage sludge feed device according to claim 3, characterized in that proximal ends of the rotation axes of the screw conveyors to the agitating housing are connected to screw feed drive motors for moving the screw conveyors, and the screw feed drive motors are mounted and connected to the side walls of the sewage sludge feed housing.The sewage sludge screw conveying device according to claim 4, characterized in that an insulation case for supplying the sewage sludge into the agitation case is disposed on a side of the agitation case opposite to the sewage sludge screw conveying case, wherein a conveying pipe for supplying the sewage sludge into the insulation case is mounted and connected to a bottom of the insulation case, and a sewage sludge pump for conveying the sewage sludge into the insulation case is mounted and connected to the conveying pipe; the agitation case and the insulation case are continuously connected to each other; and an insulation plate for blocking the sewage sludge is mounted in the insulation case, both sides of the insulation plate are sealingly in contact with inner side walls of the insulation case, and a bottom of the insulation plate is sealingly in contact with an inner bottom of the insulation case.The sewage sludge screw conveying device according to claim 5, characterized in that a side of the agitation housing facing the sewage sludge screw conveying housing is connected to the sewage sludge screw conveying housing via a piping, wherein a pump for conveying the sewage sludge to be treated from the agitation housing through the piping into the sewage sludge screw conveying housing is mounted and connected to the piping.The sewage sludge screw conveying device according to claim 6, characterized in that a passage opening for discharging the sewage sludge to be treated is provided at an end of the sewage sludge screw conveying housing facing away from the agitating housing, and a chute is mounted and connected to an outer wall of the passage opening.

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