CN214829882U

CN214829882U - Sludge drying and granulating integrated device adopting indirect and direct simultaneous sludge drying

Info

Publication number: CN214829882U
Application number: CN202121731512.7U
Authority: CN
Inventors: 施剑
Original assignee: Shanghai Maiquesi Environmental Engineering Technology Co ltd
Current assignee: Shanghai Maiquesi Environmental Engineering Technology Co ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2021-11-23
Anticipated expiration: 2031-07-28

Abstract

The utility model provides an adopt integrative device of sludge drying granulation of indirect and direct mummification mud simultaneously, include: the heat conducting oil sequentially flows through each layer of drying disc from top to bottom and indirectly exchanges heat with the sludge on the drying disc; the waste flue gas enters from the lower layer space inside the shell, diffuses around and then collects towards the middle to enter the upper layer space, and the flue gas rises to the upper space layer by layer through a channel between the drying disc and the shaft and between the drying disc and the shell while collecting and diffusing, so that the waste heat of the flue gas is utilized to directly exchange heat with the sludge on the drying disc, the moisture in the sludge is separated out, and the flue gas after heat exchange is discharged from the outlet. The utility model adopts indirect and direct heat exchange to dry sludge, thereby improving the speed of sludge drying and the processing capacity of the equipment; meanwhile, waste heat in the waste flue gas is fully utilized, the heat economy is improved, the environmental pollution is reduced, and the cost of sludge drying and granulating is reduced.

Description

Sludge drying and granulating integrated device adopting indirect and direct simultaneous sludge drying

Technical Field

The utility model relates to a sludge drying device field specifically relates to an adopt integrative device of sludge drying granulation of indirect and direct while mummification mud.

Background

With the gradual improvement of the economic development level of China, the sludge yield of a sewage treatment plant is increased day by day. At present, the sludge treatment mode in China is mainly landfill, the treatment cost is low, but most of the sludge in cities and towns is not subjected to standardized treatment in the landfill process, the treatment mode is laggard, and secondary pollution is directly caused. The sludge treatment scheme of sludge drying and incineration is an effective way for realizing reduction, stabilization, harmlessness and recycling of urban sludge, and the sludge drying cost is a technical problem which is urgently needed to be solved for restricting normal operation of sludge drying. Aiming at the existing sludge drying technology, sludge from urban sewage plants is subjected to plate frame extrusion and preliminary dehydration, the water content is 70-80%, the sludge needs to be further dehydrated to about 30% or even lower by a sludge drier according to the heat value of combustible components in the sludge, and the dried sludge enters an incinerator for combustion, so that higher combustion efficiency can be generated.

The existing vertical sludge drying machine has the advantages of small occupied area, low energy consumption, good drying effect, high safety, convenience in conveying sludge particles and the like. However, the existing vertical sludge drying machine has high requirements on the quality of a heat source, heat conduction oil or steam is used as a heat conduction medium for indirect drying, the heat conduction oil or the steam is heated, high-temperature flue gas is required as a heat source, and the heat is generally not used for providing heat for sludge drying. As is well known, in many energy projects, a large amount of low-quality heat (at a temperature below 300 ℃) is directly wasted, which not only causes a large amount of energy waste, but also causes thermal pollution to the environment.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing an adopt integrative device of sludge drying granulation of indirect and direct mummification mud simultaneously, realized that conduction oil and abandonment flue gas get into simultaneously respectively with mud carry out indirect, direct heat transfer.

The utility model provides an adopt integrative device of sludge drying granulation of indirect and direct mummification mud simultaneously, include: shell, rotatable axle, multilayer have the rake arm subassembly of scraper and be used for placing the dry disc of multilayer of material, the rake arm subassembly is in rotate under the drive of axle, it is right mud breakage, roll, mummification and granulation processing on the dry disc to follow the mud after handling on the dry disc is inboard or outside lateral edge or the central promotion falls down to the dry disc of lower floor, its characterized in that still includes:

the pipeline is arranged in the shell and used for introducing heat conduction oil, and the heat conduction oil sequentially flows through each layer of drying disc from top to bottom through the pipeline and indirectly exchanges heat with the sludge on the drying disc so as to dry and dehydrate the sludge;

set up in be used for letting in the import of abandonment flue gas and the export that is used for discharging the abandonment flue gas on the shell, wherein, the import set up in the below of shell, the export set up in the top of shell, the waste gas flue gas is followed the inside lower floor's space of shell gets into and gathers to the centre, gets into the upper space, and the flue gas is when diffusion, gathering promptly, through dry disc and axle the passageway successive layer between the shell rises to casing top space, utilizes the waste heat of waste gas flue gas with the direct heat transfer of mud on the dry disc to make moisture deviate from in the mud, follow together with the waste gas flue gas after the heat transfer the export is discharged.

Preferably, the jackets in the drying disks and the jackets of the adjacent drying disks are communicated in sequence to form a circulation channel of the heat conducting oil.

Preferably, the inlet of the housing is connected to the incinerator outlet.

Preferably, the multi-layer scraper arm assembly comprises:

the scraper is arranged on the scraper blade of the first rake arm component layer;

the second rake arm component layer is arranged on the shaft, and scrapers with inclination angles are arranged on rake blades of the second rake arm component layer; and the blade length of the second arm assembly layer is greater than the blades of the first arm assembly layer;

the first rake arm component layer and the second rake arm component layer are sequentially distributed at intervals along the axial direction of the shaft, and scrapers on the first rake arm component layer and the second rake arm component layer are arranged in a reverse direction.

Preferably, the first and second rake arm assembly layers each comprise 4-8 rake blades.

Preferably, the multi-layer drying disk comprises:

the centers of the first drying disks respectively penetrate through the shaft and are arranged right below the first rake arm component layer to be fixed with the shell, a gap is reserved between the center of the first drying disk and the shaft, and a channel for sludge falling and waste flue gas rising is reserved between the outer edge of the first drying disk and the inner wall of the shell;

the outer diameter of the second drying discs is larger than that of the first drying discs, the centers of the second drying discs penetrate through the shaft respectively and are arranged right below the second rake arm component layer to be fixed with the shell, a channel for sludge to fall and waste flue gas to rise is reserved between the center of the second drying discs and the shaft, and the outer edge of each second drying disc is tightly attached to the inner wall of the shell.

Preferably, the outlet is provided at the top of the housing in a vertical direction.

Preferably, the inlet is provided at the bottom of the housing in a horizontal direction.

Preferably, the top and the bottom of the shell are respectively provided with a feed inlet for feeding sludge and a discharge outlet for discharging sludge.

Preferably, the housing is cylindrical.

Compared with the prior art, the utility model discloses at least one kind's beneficial effect as follows has:

the device of the utility model, through setting up the pipeline used for letting in the conduction oil and the import and the export used for passing in and out the abandonment flue gas, can let in abandonment flue gas and conduction oil simultaneously in the space storing with mud, adopt indirect and direct mode to dry mud, can improve the speed of sludge drying, improve the handling capacity of the apparatus; waste heat in the waste flue gas can be fully utilized, the heat economy is improved, the environmental pollution is reduced, and the cost of sludge drying granulation is reduced; the velocity of flow of abandonment flue gas at shell inner space is very little, can not cause dry mud to produce the raise dust to oxygen content is very low in the flue gas, can not produce the risk of dust explosion.

The above device of the utility model, further through will import and outside burning furnace export links to each other, the waste gas flue gas that lets in is the flue gas after deacidification, dust removal treatment, and its temperature generally is about 150 ℃, avoids the flue gas waste heat can't be further utilized, and direct emission to the atmosphere, the reducible thermal pollution that can cause the environment simultaneously.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of an integrated sludge drying and granulating device for indirectly and directly drying sludge simultaneously according to a preferred embodiment of the present invention;

fig. 2 is a schematic structural view of a drying disc according to a preferred embodiment of the present invention;

fig. 3 is a sectional view taken along line a-a of fig. 2.

The scores in the figure are indicated as: the device comprises a feed port 1, a shell 2, a material distributor 3, a first rake arm component layer 4, a first drying disk 5, a second rake arm component layer 6, a second drying disk 7, a shaft 8, a motor 9, a heat conduction oil inlet 10, a heat conduction oil outlet 11, a heat conduction oil outlet 12, an inlet 13, a discharge port 14 and a jacket 5001.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention. Portions not described in detail in the following embodiments may be implemented using existing components.

Referring to fig. 1, it is a schematic structural diagram of an integrated sludge drying and granulating device using indirect and direct simultaneous sludge drying according to a preferred embodiment of the present invention, and the structure diagram includes: the shell 2, shell 2 inside has the storage space that is used for the closed of storage mud material. The top and the bottom of the shell 2 are respectively provided with a feed inlet 1 and a discharge outlet 14 which are communicated with the storage space, the feed inlet 1 is used for adding wet sludge materials into the storage space, the wet sludge materials are fed to the drying disc positioned on the uppermost layer, and the discharge outlet 14 is used for discharging the sludge materials subjected to drying granulation.

Referring to fig. 1, a shaft 8, a plurality of layers of rake arm assemblies with scrapers, a plurality of layers of drying discs, a pipeline for introducing heat-conducting oil, an inlet 13 and an outlet 12 for introducing and discharging waste flue gas are arranged in the storage space.

Wherein, the shaft 8 is rotatably arranged in the middle of the material storage space, and the shaft 8 can rotate in the material storage space; preferably, a motor 9 is mounted below the shaft 8 for driving the shaft 8 in rotation.

The multilayer harrow arm components with scrapers are sequentially fixed on the shaft 8 at intervals along the axial direction of the shaft 8, and the rotation of the shaft 8 can drive the multilayer harrow arm components with scrapers to synchronously rotate; a layer of drying disc is arranged under each layer of rake arm assembly and used for placing sludge materials, each layer of rake arm assembly is driven by a shaft 8 to rotate, sludge on the drying disc positioned below the rake arm assembly is crushed, rolled, dried and granulated, and the treated sludge is pushed from the inner side or the outer side of the drying disc to the edge or to the center and falls onto the lower layer of drying disc.

The method comprises the following steps of sequentially arranging pipelines for introducing heat conduction oil from the upper layer to the lower layer along a plurality of layers of drying disks, wherein the pipelines are provided with a heat conduction oil inlet 10 and a heat conduction oil outlet 11, and the heat conduction oil inlet 10 is connected with the drying disk on the uppermost layer; the heat conducting oil outlet 11 is connected with the drying disc at the lowest layer, the heat conducting oil enters from the heat conducting oil inlet 10 and sequentially flows through each layer of drying disc from top to bottom, indirect heat exchange is carried out on the heat conducting oil and the sludge material on each layer of drying disc, the moisture in the sludge material is evaporated, and drying dehydration is achieved.

Set up the import 13 that is used for letting in the abandonment flue gas that is linked together with inside storage space and the export 12 that is used for discharging the abandonment flue gas on shell 2, wherein, import 13 sets up in the below of shell 2, export 12 sets up in the top of shell 2, the waste gas flue gas gets into and spreads all around from the inside lower floor space of shell 2, then to middle the collection, get into upper space, the flue gas is gathering, when the diffusion, through dry disc and axle 8, passageway successive layer between the casing of shell 2 rises to casing top space, utilize the waste heat of waste gas flue gas and the direct heat transfer of mud on the dry disc to make moisture deviate from in the mud, waste gas flue gas after the heat transfer is discharged from export 12.

The working process of the device is as follows:

when wet sludge materials are continuously added to the material distributor 3 at the top by the feeder, the sludge materials are uniformly distributed on the drying disc by the material distributor 3, the material scraping rake arm component makes rotary motion, the sludge material on the upper layer of the drying disc is crushed, rolled, dried and granulated, scraping and pushing the treated sludge material to the outer edge or the inner side, dropping the sludge material onto a lower layer of drying disc, crushing, rolling, drying and granulating the sludge dropped onto the drying disc through a rake arm assembly on the layer, scraping and pushing the treated sludge material to the outer edge or the inner side, dropping the sludge material on the next layer of drying disc, repeating the steps in sequence until the sludge material drops to the bottommost layer of drying disc, the material falling into the layer is scraped and pushed to a discharge port 14 by a rake arm assembly on the layer of drying disc to be discharged; the heat conduction oil is conveyed into the drying disks through a pipeline, so that the heat conduction oil flows through each layer of drying disks and indirectly exchanges heat with the sludge materials on each layer of drying disks, and the moisture in the sludge is evaporated; meanwhile, the temperature of the flue gas after deacidification and dust removal at the outlet of the incinerator is about 150 ℃, the flue gas waste heat cannot be further utilized and is directly discharged to the atmosphere, and the environment is polluted thermally. The flue gas of the part of waste gas is introduced into the shell 2 and directly exchanges heat with the sludge material on the drying disc, so that the flue gas of the waste gas is recycled. The flue gas enters from the inlet 13 of the shell 2, diffuses to the periphery, then converges to the middle, enters into the upper space, converges and diffuses layer by layer in the drying space, rises to the uppermost space of the shell layer by layer through a channel between the drying disc and the shaft 8 as well as between the drying disc and the shell, can directly exchange heat with the sludge on the drying disc in the diffusion and convergence process of the flue gas, removes moisture in the sludge, and leaves the equipment together with the waste gas and the flue gas after heat exchange from the outlet 12. The flow velocity of the flue gas in the shell is very low in the storage space, so that the dry sludge is not caused to generate raise dust, the oxygen content in the flue gas is very low, and the risk of dust explosion is avoided.

The device adopts indirect and direct sludge drying modes, so that the sludge drying speed can be increased, and the treatment capacity of equipment can be improved; the waste heat in the waste flue gas can be fully utilized, the heat economy is improved, the environmental pollution is reduced, and the cost of sludge drying and granulating is reduced.

In other partially preferred embodiments, a jacket 5001 is provided inside the drying disk to form a conduction oil flow path so that the conduction oil flows through the entire drying disk along the flow path. The jacket 5001 is provided with a heat-conducting oil inlet 10 and a heat-conducting oil outlet 11; the jackets 5001 of the adjacent drying disks are communicated in sequence through a pipeline, so that the jackets 5001 of the multiple layers of drying disks are communicated in sequence from top to bottom.

As a preferred mode, the drying disk includes: the first semicircular part and the second semicircular part form an integrated disc structure after the second semicircular part and the first semicircular part are spliced.

Referring to fig. 2 and 3, the first and second semicircular portions have the same structure, and both include: the heat conducting medium is an arc-shaped hollow cavity, a plurality of arc-shaped guide plates are uniformly distributed in the radial direction at intervals in the hollow cavity, arc-shaped flow channels are formed between the adjacent arc-shaped guide plates and the inner wall of the hollow cavity, namely a jacket 5001 structure is formed, a plurality of arc-shaped flow channels connected end to end are formed in the hollow cavity from inside to outside, namely a one-way roundabout labyrinth flow channel is formed between the arc-shaped guide plates and the inner wall of the hollow cavity, so that the heat conducting medium flows along a one-way roundabout path in the labyrinth flow channel. In the heating process, the heat conduction oil flows in a single direction, no dead zone exists, the temperature difference between adjacent arc-shaped flow channels is extremely small, and the purpose of preventing the heat conduction surface of the drying disc from deforming due to uneven heating is achieved.

An inlet pipeline and an outlet pipeline are arranged on the outer wall of the hollow cavity, the inlet pipeline 1 is communicated with an inlet of the labyrinth flow channel, and heat conduction oil is introduced into the labyrinth flow channel through the inlet pipeline. The outlet pipeline is communicated with an outlet of the labyrinth flow passage, and the heat conducting oil in the labyrinth flow passage is discharged through the outlet pipeline.

In other partially preferred embodiments, the inlet 13 of the housing 2 is connected to the incinerator outlet.

In other preferred embodiments, the multi-tiered scraper arm assembly comprises: a number of first and second rake arm assembly layers 4, 6 mounted on a shaft 8. A row of scrapers with inclination angles are arranged on the rake arms of the first rake arm component layer 4 and the second rake arm component layer 6;

the length dimension of the second rake arm assembly layer 6 is greater than that of the first rake arm assembly layer 4;

the first rake arm component layer 4 and the second rake arm component layer 6 are sequentially distributed at intervals along the axial direction of the shaft 8, and the installation angles of the scrapers on the first rake arm component layer 4 and the second rake arm component layer 6 are opposite.

The multilayer drying disk comprises: the drying device comprises a plurality of first drying circular discs 5 and a plurality of second drying circular discs 7, wherein the first drying circular discs 5 and the second drying circular discs 7 are sequentially arranged at intervals from top to bottom. As a preferable mode, the heat conducting oil is introduced into the jacket 5001 of the first drying disk 5 and the second drying disk which are positioned at the uppermost positions at the same time, and after passing through the whole drying disks and being subjected to heat exchange, the heat conducting oil flows into the first drying disk 5 and the second drying disk 7 of the next layer through the pipeline.

The center of the first drying disk 5 is provided with a first central through hole. First central through holes of the plurality of first drying disks 5 respectively pass through the shaft 8 and are arranged right below the first rake arm assembly layer 4 and fixed with the housing 2. A gap is reserved between the center of the first drying disc 5 and the shaft 8, and a first channel for sludge falling and waste flue gas rising is reserved between the outer edge of the first drying disc 5 and the inner wall of the shell 2; the first rake arm assembly level 4 is sized to match the first drying disk 5.

The center of the second drying disk 7 is provided with a second central through hole. The outer diameter of the second drying disk 7 is larger than that of the first drying disk 5, and second central through holes of the second drying disks 7 respectively penetrate through the shaft 8 and are arranged right below the second rake arm component layer 6 to be fixed with the shell 2. A second channel for sludge falling and waste flue gas rising is reserved between the inner wall of a second central through hole of the second drying disk 7 and the shaft 8, and the outer edge of the second drying disk 7 is tightly attached to the inner wall of the shell 2. The second rake arm assembly level 6 is sized to match the second drying disk 7.

In the implementation, when a feeder continuously adds wet materials to a first drying disc 5 on the top, the blades of a first rake arm component layer 4 do rotary motion, sludge on the first drying disc 5 is crushed, rolled, dried and granulated by means of a scraper, and the sludge materials are pushed from the inner side of the first drying disc 5 to the edge of the disc and fall onto a second drying disc 7 on the lower layer; the sludge material on the second drying disk 7 rolls and is pushed to the inner side edge of the disk from the outer side of the disk under the scraping action of the reverse scraper, the sludge material drops to the first drying disk 5 on the next layer, the first drying disk 5 and the second drying disk 7 are alternately arranged, the steps are sequentially carried out, the sludge material is gradually dried and dehydrated, finally, the qualified dried sludge falls to the sludge material on the second drying disk 7 on the bottommost layer, and the sludge material is scraped by the rake blades of the second rake arm component layer 6, pushed to the central discharge hole 14 and discharged, and is sent out of the vertical disk drier.

In other partially preferred embodiments, the first and second rake arm assembly layers 4, 6 each comprise 4-8 rake blades.

In other partially preferred embodiments, and as shown with reference to FIG. 1, the outlet 12 is disposed at the top of the housing 2 in a vertical orientation.

In other partially preferred embodiments, the inlet 13 is disposed at the bottom of the housing 2 in a horizontal orientation, as shown with reference to FIG. 1. Preferably, the inlet 13 is located on the same side as the outlet 12.

In other partially preferred embodiments, the housing is cylindrical.

All the parts used in the application documents can adopt standard parts or common technologies if not detailed, and can be purchased from the market, the specific connection mode of all the parts can adopt conventional means such as bolts, rivets, welding and the like mature in the prior art, the machinery, the parts and the electrical equipment adopt conventional models in the prior art, the circuit connection adopts the conventional connection mode in the prior art, and the method is easy to realize for the person skilled in the art, and the detailed description is not provided.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. The utility model provides an adopt integrative device of sludge drying granulation of indirect and direct mummification mud simultaneously, includes: shell, rotatable axle, multilayer have the rake arm subassembly of scraper and be used for placing the dry disc of multilayer of material, the rake arm subassembly is in rotate under the drive of axle, it is right mud breakage, roll, mummification and granulation processing on the dry disc to follow the mud after handling on the dry disc is inboard or outside lateral edge or the central promotion falls down to the dry disc of lower floor, its characterized in that still includes:

2. The integrated sludge drying and granulating device capable of indirectly and directly drying sludge simultaneously as claimed in claim 1, wherein the jackets in the drying disks and the jackets of the adjacent drying disks are sequentially communicated to form a flow channel for heat conducting oil.

3. The integrated sludge drying and granulating device for indirectly and directly drying sludge as claimed in claim 1, wherein the inlet of the housing is connected to the outlet of the incinerator.

4. The integrated sludge drying and granulating device for indirectly and directly drying sludge simultaneously as claimed in claim 1, wherein the multi-layer scraper arm assembly with scrapers comprises:

5. The integrated sludge drying and granulating device for indirectly and directly drying sludge simultaneously as claimed in claim 4, wherein the first and second rake arm assembly layers each comprise 4-8 rake blades.

6. The integrated sludge drying and granulating device for indirectly and directly drying sludge simultaneously as claimed in claim 4, wherein the multi-layer drying disk comprises:

7. The integrated sludge drying and granulating device for indirectly and directly drying sludge according to any one of claims 1 to 6, wherein the outlet is vertically arranged at the top of the housing.

8. The integrated sludge drying and granulating device for indirectly and directly drying sludge according to any one of claims 1 to 6, wherein the inlet is arranged at the bottom of the housing along a horizontal direction.

9. The integrated sludge drying and granulating device for indirectly and directly drying sludge simultaneously as claimed in any one of claims 1 to 6, wherein the top and bottom of the housing are respectively provided with a feed inlet for feeding sludge and a discharge outlet for discharging sludge.

10. The integrated sludge drying and granulating device for indirectly and directly drying sludge according to any one of claims 1 to 6, wherein the housing is cylindrical.