CN213388281U - Heating assembly and sludge drying system - Google Patents

Abstract

The utility model relates to a sludge drying technical field discloses a heating element and sludge drying system, is provided with backmixing system and heating element in the sludge drying system, and heating element is including transportation pipeline and heating device, and transportation pipeline is connected with the mummification machine, and the wet sludge who obtains by the backmixing system enters into the transportation pipeline, and the heating device of transportation pipeline and mummification machine import department heats wet sludge, has solved the problem that wet sludge temperature is low excessively.

Description

Heating assembly and sludge drying system

Technical Field

The utility model relates to a sludge drying technical field especially relates to a heating element and sludge drying system.

Background

In the existing sludge treatment process, firstly, sludge is conveyed into a sludge drying system through a sludge conveying system, then the sludge conveyed by the sludge conveying system is treated and formed by the sludge drying system, and then the formed sludge is flatly paved on a mesh belt with the width of 1.4 meters, so that gaps are reserved among the formed sludge, the maximum contact area of the sludge and hot air is increased, the humidity of humid air is increased to the maximum extent, the optimal moisture discharging effect is achieved, the sludge runs for about 100 minutes in the sludge drying system, the set drying requirement is met, and the dried sludge can be automatically conveyed to a drying bin through the conveying system.

However, in the practical application process, the sludge is often too wet to achieve the preset effect, and particularly in winter in the south of China, the sludge has the problem of too low temperature.

The sludge temperature is too low, so that the low-temperature wet sludge in winter can be subjected to secondary condensation, the sludge fluidity in the pipeline is reduced, the sludge pipeline is easy to block, the maintenance workload of a screw pump for conveying the wet sludge is increased, meanwhile, the hot air in the drying main machine reservoir body cannot go up, the heat efficiency is greatly reduced, and the capacity is reduced.

Therefore, the problem that the temperature of wet sludge is too low in the sludge drying process is to be solved at present.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a heating element and sludge drying system is provided with backmixing system and heating element in the sludge drying system, and heating element is connected with the desiccator including transportation pipeline and heating device, transportation pipeline, and the wet sludge who obtains by the backmixing system enters into the transportation pipeline, and the heating device of transportation pipeline and desiccator import department heats wet sludge, has solved the problem that wet sludge temperature is low excessively.

In some embodiments of the present application, a heating assembly is provided for use in a sludge drying system, comprising: a dryer for drying wet sludge to obtain dry sludge; the transport pipeline is used for conveying wet sludge into the drying machine; a heating device for heating wet sludge; the heating device includes: the pipeline heating device is arranged on the conveying pipeline and used for heating the conveying pipeline so as to heat wet sludge; the heating device of the drying machine is arranged at the inlet of the drying machine and used for heating wet sludge entering the drying machine.

In some embodiments of the present application, the pipeline heating device is a sleeve that is fitted over the transport pipeline peripheral pipeline the pipeline heating device with a gap between the transport pipelines, the gap being internally provided with a liquid.

In some embodiments of the present application, the liquid disposed inside the gap is steam condensate at 85 ℃ to 95 ℃.

In some embodiments of the present application, the gap is a closed cavity, the gap is communicated with the condensed water tank, and a drain valve is disposed between the gap and the condensed water tank.

In some embodiments of the present application, the transport pipeline is configured as a DN350 seamless steel pipe; the pipeline heating device is set to be a DN420 seamless steel pipe.

In some embodiments of the present application, the dryer heating device is an infrared nano heating ring.

In some embodiments of this application, the one end of transportation pipeline with the mummification is connected, the other end of transportation pipeline is connected with the screw pump, the screw pump is used for driving wet mud and is in wet mud removes in the transportation pipeline.

In some embodiments of the present application, the pipeline heating device is a heating wire attached to an outer surface of the transportation pipeline.

In some embodiments of this application, still provide a sludge drying system, including the backmixing system, still include heating element, the transport pipe way sets up the downside of backmixing system, wet mud in the backmixing system flows into in the transport pipe way.

Compared with the prior art, the embodiment of the utility model, its beneficial effect lies in:

the sludge drying system is internally provided with the back mixing system, so that part of dry sludge is mixed with wet sludge, the humidity of the wet sludge is reduced, the wet sludge is conveniently paved and molded during drying, the fluidity is reduced, the ventilation effect during drying is increased, and the drying efficiency is improved; through set up pipeline heating device outside the conveying pipeline to set up infrared nanometer heating collar in desiccator import department, improve the temperature of mixing wet mud, avoid secondary condensation in the desiccator, block up the sludge conduit, improve the thermal efficiency of desiccator.

Drawings

FIG. 1 is a block diagram of a sludge drying system according to an embodiment of the present invention;

FIG. 2 is a block diagram of a sludge drying system according to an embodiment of the present invention;

FIG. 3 is a detail view of FIG. 2 "A" in an embodiment of the present invention;

FIG. 4 is a front view of the lift blades in an embodiment of the present invention;

FIG. 5 is a structural view of a lift blade in an embodiment of the present invention;

FIG. 6 is one of the structural diagrams of the agitation tank in the embodiment of the present invention;

FIG. 7 is one of the structural diagrams of the agitation tank in the embodiment of the present invention.

In the figure, 100, a dry sludge conveying system; 200. a back mixing system; 210. lifting the screw; 211. an opening; 220. lifting the scraper; 221. a lifting portion; 222. a transport section; 223. a feed inlet; 224. a discharge port; 225. a second screw pump; 226. a third screw pump; 230. a stirring tank; 231. a lead-out port; 232. a motor; 233. a drive shaft; 300. an infrared nano heating ring; 400. a transport pipeline; 500, a step of; a first screw pump; 600. a pipeline heating device.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

In some embodiments of the present application, a sludge drying system is provided, the sludge drying system includes a dry sludge conveying system 100, a back mixing system 200, a heating assembly, the heating assembly includes a drying machine therein, a transport pipeline 400 and a heating device, the dry sludge conveying system 100 is connected to the drying machine and the back mixing system 200, a part of dry sludge dried by the drying machine is conveyed to the back mixing system 200, the dry sludge is mixed with wet sludge in the back mixing system 200 to obtain wet sludge with a water content smaller than that of the wet sludge, and the wet sludge is conveyed to the drying machine through the transport pipeline 400.

In some embodiments of the present application, a lifting screw 210, a lifting scraper 220, and a mixing tank 230 are included in the back mixing system 200.

One end of the lifting screw 210 is connected to the dry sludge conveying system 100, the other end of the lifting screw is provided with an opening 211, the opening 211 is communicated with the lifting scraper 220, the lifting screw 210 is a shell with a central through hole, a screw shaft is arranged inside the shell, after the dry sludge enters the lifting screw 210, the dry sludge is scattered inside the shell under the action of the screw shaft, and the dry sludge is conveyed to the lifting scraper 220 according to the screw direction of the screw shaft.

The lifting scraper 220 comprises a lifting part 221 and a conveying part 222, and the lifting scraper 220 is a hollow and bent shell; relative to the ground, the transportation part 222 is arranged on the upper side of the lifting part 221, and the bending part of the lifting scraper 220 is the connection part of the transportation part 222 and the lifting part 221, namely, the lifting part 221 is communicated with one end of the transportation part 222; one end of the lifting part 221, which is positioned at the upper side, is communicated with the conveying part 222, one end of the lifting part 221, which is positioned at the lower side, is provided with a feed inlet 223, the feed inlet 223 is communicated with the lifting screw 210, and dry sludge in the lifting screw 210 enters the lifting scraper 220 through the feed inlet 223; the lower side of the transportation part 222 is provided with a discharge port 224.

In order to automatically feed the dry sludge into the stirring tank 230, the lifting scraper 220 is used to transport the dry sludge to a high place, and the discharge port 224 is formed in the lower side of the lifting scraper, so that the function of transporting the dry sludge is realized.

The lifting scraper 220 is further provided with a second screw pump 225 and a third screw pump 226, wherein the second screw pump 225 is arranged at the other end of the transportation part 222 and is used for driving the dry sludge entering the transportation part 222 to move along the rotation direction of the screw shaft, and the moving direction is from one end of the transportation part 222 to the other end; the third screw pump 226 is provided at one end of the lifting part 221 on the lower side, and drives the dry sludge to move from the bottom up.

It should be noted that, dry sludge is in the mummification in-process, need earlier the shaping for the strip back, air-dry again, consequently dry sludge is the fashioned strip mostly, the dry sludge of strip can cause the burden to conveyer in the transportation, cause the impact to conveyer's casing, and influence the follow-up mixing uniformity who mixes with wet mud, consequently set up and promote spiral 210, second screw pump 225 and third screw pump 226, when will dry sludge transmission to promotion scraper blade 220, break up dry sludge.

It should be noted that, the lifting screw 210 is transported in an inclined upward manner, and the dry sludge slides downward during transportation in a conventional transportation manner, so that the lifting efficiency is reduced, and therefore, the transportation efficiency can be improved by providing the screw shafts in the lifting screw 210 and the lifting part 221 and transporting the dry sludge upward by means of screw rotation.

The stirring tank 230 is disposed under the discharge port 224 of the elevating scraper 220, and the stirring tank 230 includes a discharge port 231, a switch, a plurality of stirring fins having different diameters concentric with the shaft, a driving shaft 233 at the bottom, and a motor 232. The stirring wing is sleeved on the driving shaft 233, and the driving shaft 233 is driven to rotate by the motor 232, so as to drive the stirring wing to rotate, thereby completing stirring. The outlet 231 is disposed at the bottom of the agitator tank 230, and communicates the inside and the outside of the agitator tank 230, and the outlet 231 is further provided with a switch, wherein the switch is closed when the agitator tank 230 is agitated, and the switch is opened when the agitator tank 230 is agitated, and the wet sludge obtained by agitation flows into the transport pipeline 400 through the outlet 231.

In an embodiment of this application, promote about 3000KG of scraper 220 weight, transportation volume is greater than 6 m/h, and total length is about 15200mm, 1 feed inlet 223 in total, 2 discharge gates 224, 2 access holes, and the size of feed inlet 223 and discharge gate 224 is 450 x 250mm, thickness 5 mm. The shell adopts the 304 corrosion resistant plate of 4mm to bend and forms, and the high 356mm of lift portion 221, width 340mm, effective width 300mm, the anticorrosive treatment of paint is taken on lift scraper 220 shell surface, and lift portion 221 and the transport portion 222 in the lift scraper 220 all adopt the preparation of 30mm corrosion resistant plate.

In an embodiment of the present application, 2 sets of stirring tanks 230 are respectively disposed at the lower sides of the two discharge ports 224, each stirring tank 230 has an effective volume of 3m and a diameter of 2000mm, and is configured for performing a stirring flow rate of 12m and performing a cultivation/h, and 4 sets of concentric-shaft stirring fins with different diameters are disposed in the stirring tank 230, wherein each stirring fin is provided with three scraping blades. The tank side plates are made of a 4mm carbon steel plate, the inner liner is made of a 2mm304 stainless steel plate, the tank bottom plate is made of a 6mm carbon steel plate, the inner liner is made of a 2mm304 stainless steel plate, and the stirring fin part and the fixing sleeve in the tank are made of 304 stainless steel. The motor 232 has a power of 15 KW.

It should be noted that, under the normal condition, there is 80% wet sludge moisture content to be higher than 80%, therefore in the mummification process, need to wet sludge slitting shaping back, air-dry on the guipure, but when the moisture content of wet sludge was too big, the unable slitting shaping of wet sludge, when tiling on the guipure simultaneously, because the mobility of mud is big, can lead to mud directly to drop from the top layer guipure, form the pie, serious still can block up the ventilation hole on the guipure, damage equipment, reduce efficiency, consequently through setting up back mixing system 200, make dry sludge mix with wet sludge in getting into agitator tank 230 through promotion spiral 210 and promotion scraper blade 220, obtain the wet mud that the moisture content is lower, make the wet mud of mixing can slitting shaping on the guipure, improve air-dry efficiency, avoid blockking up the ventilation hole.

In some embodiments of the present application, the sludge drying system is further provided with a heating assembly, the heating assembly includes a dryer, a transport pipe 400, a heating device and a first screw pump 500, and the heating device includes a pipe heating device 600 and a dryer heating device. The wet sludge mixed by the mixing tanks 230 flows out through the outlet 231 and flows into the transport pipeline 400 on the lower side, the transport pipeline 400 is arranged along the arrangement direction of the mixing tanks 230, and a first screw pump 500 is arranged at one end of the transport pipeline 400 and used for driving the wet sludge to move to the other end of the transport pipeline 400.

Pipeline heating device 600 sets up on transportation pipeline 400, pipeline heating device 600 establishes the pipeline at transportation pipeline 400 outlying for the cover, the clearance has between pipeline heating device 600 and transportation pipeline 400, and the clearance is closed cavity, the gap connection has the condensate tank, and be provided with the trap between condensate tank and the clearance, through opening the trap, pour into 85 ℃ -95 ℃ steam condensate into the clearance, it realizes the circulation return water to lead to the effect of steam condensate tank, keep the temperature of steam condensate, be used for heating transportation pipeline 400 through pipeline heating device 600, and then heat the muddy wet mud in the transportation pipeline 400.

In one embodiment of the present application, the transport pipeline 400 is configured as a DN350 seamless steel pipe, and the pipeline heating device 600 is configured as a DN420 seamless steel pipe.

In other embodiments of the present application, the pipeline heating device 600 is configured as a heating wire attached to the outer surface of the transportation pipeline 400.

The other end and the mummification machine intercommunication of transport pipe 400, the export of transport pipe promptly and the access connection of mummification machine, the import department cover at the mummification machine is equipped with mummification machine heating device, in an embodiment of this application, mummification machine heating device sets up to infrared nanometer heating ring 300, further heats muddy wet mud.

The wet sludge is dried into dry sludge in the drying machine and then enters the dry sludge transportation system, the dry sludge transportation system transports part of the dry sludge to the dry material bin, and transports the other part of the dry sludge to the back mixing system to continuously participate in the process of drying the wet sludge.

It should be noted that, in winter, the temperature of wet mud is crossed lowly and is leaded to wet mud to take place secondary condensation phenomenon, the transmission course of whole equipment is the pipe-line apparatus mostly, if mix wet mud and become little because of the temperature is crossed lowly and mobility, then can take place to mix the condition that wet mud blockked up the pipeline, increase the work load of maintenance, the thermal efficiency reduces, consequently, heat mixing wet mud through setting up pipeline heating device 600 and infrared nanometer heating coil 300, avoid secondary condensation, and set up pipeline heating device 600 into the form of pouring into the steam condensate water in the cover establishment pipeline clearance, make the effect of heating more even effective, and heating temperature is controllable.

In some embodiments of the present application, a method of operating a sludge drying system is provided, comprising:

s1, conveying part of dried sludge dried by the dried sludge machine to the lifting screw 210 by the dried sludge conveying system 100, scattering the dried sludge by the lifting screw 210 and conveying the scattered dried sludge to the lifting scraper 220;

s2: the dry sludge enters the lifting part 221 from the feeding hole 223, ascends under the driving of the third screw pump 226, further enters the conveying part 222, and moves in the conveying part 222 under the action of the second screw pump 225;

s3: the dry sludge moves in the transportation part 222, when the dry sludge passes through the discharge port 224, the dry sludge falls into the stirring tank 230, the wet sludge is contained in the stirring tank 230, and the stirring tank 230 stirs the dry sludge and the wet sludge to obtain wet-mixed sludge;

s4: mix wet mud stirring and accomplish the back, lead the export 231 switch and open, mix wet mud and drop the transportation pipeline 400 by agitator tank 230 in, under the drive of first screw pump 500, remove to the desiccator, at the removal in-process, pipeline heating device 600 heats mixing wet mud, when mixing wet mud and reaching the desiccator import, infrared nanometer heating coil 300 further heats mixing wet mud, and then enters into the desiccator, dries mixing wet mud, obtains dry sludge.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A heating assembly for use in a sludge drying system, the heating assembly comprising:

the drying machine is used for drying the wet sludge to obtain dry sludge;

the transportation pipeline is used for conveying the wet sludge to the drying machine;

the heating device is used for heating the wet mixing mud;

the heating device includes:

the pipeline heating device is arranged on the conveying pipeline and used for heating the conveying pipeline so as to heat the wet mixed mud;

the drying machine heating device is arranged at an inlet of the drying machine and used for heating wet mud entering the drying machine.

2. The heating assembly of claim 1, wherein the pipeline heating device is a pipeline sleeved on the periphery of the transportation pipeline, a gap is formed between the pipeline heating device and the transportation pipeline, and liquid is arranged in the gap.

3. The heating assembly of claim 2, wherein the liquid disposed within the gap is steam condensate at a temperature of 85 ℃ to 95 ℃.

4. The heating assembly of claim 2, wherein the gap is a closed cavity, the gap communicates with a condensate tank, and a trap is disposed between the gap and the condensate tank.

5. The heating assembly of claim 2, wherein the transport conduit is provided as DN350 seamless steel tubing; the pipeline heating device is set to be a DN420 seamless steel pipe.

6. The heating assembly of claim 1, wherein the dryer heating device is an infrared nano-heating coil.

7. The heating assembly of claim 1, wherein one end of the transport pipeline is connected to the drying machine, and the other end of the transport pipeline is connected to a first screw pump for driving the wet mixed mud to move in the transport pipeline.

8. The heating assembly of claim 1, wherein said line heating means is a heater wire attached snugly to an outer surface of said transport line.

9. A sludge drying system, which comprises a back mixing system and a heating assembly as claimed in any one of claims 1 to 8, wherein the transportation pipeline is arranged at the lower side of the back mixing system, and wet sludge in the back mixing system flows into the transportation pipeline.

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