CN212581742U - Novel double-helix sludge drying machine - Google Patents
Novel double-helix sludge drying machine Download PDFInfo
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- CN212581742U CN212581742U CN202020888199.7U CN202020888199U CN212581742U CN 212581742 U CN212581742 U CN 212581742U CN 202020888199 U CN202020888199 U CN 202020888199U CN 212581742 U CN212581742 U CN 212581742U
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Abstract
The utility model relates to the technical field of sludge treatment, in particular to a novel double-helix sludge drier, which comprises a casing and a motor, wherein two screw rods arranged at intervals are arranged at the bottom in the casing, the two screw rods are both provided with a plurality of continuous helical blades, and the driving end of each screw rod is in transmission connection with the motor; a plurality of cigarette folding plates which are arranged at intervals are arranged at the top in the shell; the bottom of casing is provided with the discharge opening, the top of casing is provided with feed inlet and exhanst gas outlet, the end of casing is provided with the flue gas import, compared with the prior art, through set up a plurality of cigarette folding plates in the casing, thereby prolong the dwell time of flue gas in the casing, so that abundant heat transfer, heat transfer efficiency is high, the cost is low, and, the structure of mummification machine is simple and easy, take up an area of less, it is convenient to install, the device leakproofness is good, the operation is reliable, the maintenance cost is low, be applicable to municipal sludge, the heat drying of industrial sludge handles, the mud moisture content after the mummification can fall to 30-50.
Description
Technical Field
The utility model relates to a sludge treatment technical field, concretely relates to novel double helix sludge drying machine.
Background
At present, domestic equipment for sludge heat drying mainly comprises a drum dryer, a disc dryer, a paddle dryer, a belt dryer and the like.
The drum dryer is in a direct heat exchange mode, high-temperature flue gas is in direct contact with the surface of the material to transfer heat, so that moisture in the material is evaporated, and the heat transfer efficiency is high. The drum dryer has the defects that the occupied area is large, the sealing of the rotating parts at the front end and the rear end is difficult, the phenomena of air leakage, smoke leakage and ash leakage exist, the number of refractory materials of the rotary kiln cylinder is large, the refractory materials are easy to fall off along with the rotation of the cylinder, the regular maintenance or replacement is needed, and the maintenance cost is low. The disc dryer is similar to the paddle dryer, an indirect heat exchange mode is adopted, an external steam heat source is needed, and steam is introduced into the hollow paddles to heat materials on the outer walls of the paddles. Relatively speaking, heat transfer is not as efficient as direct heat exchange. In addition, the heating steam is generally low-pressure steam and is not high in temperature, so that the required heat transfer area is large, and the equipment cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel double-helix sludge drying machine with simple structure aiming at the defects in the prior art.
The purpose of the utility model is realized through the following technical scheme: the application provides a novel double-helix sludge drying machine, which comprises a casing and a motor, wherein two screw rods arranged at intervals are arranged at the bottom in the casing, the two screw rods are respectively provided with a plurality of continuous helical blades, and the driving end of each screw rod is in transmission connection with the motor; a plurality of cigarette folding plates which are arranged at intervals are arranged at the top in the shell; the bottom of casing is provided with the discharge opening, and the top of casing is provided with feed inlet and exhanst gas outlet, and the end of casing is provided with the flue gas import.
Wherein, each helical blade is fixedly provided with a material cutting blade.
Wherein, the extension line of the cutting blade does not intersect with the axle center of the helical blade.
Wherein, the screw pitch that is located the helical blade of screw rod back half section between two adjacent helical blade reduces along material direction of delivery gradually.
Wherein, the inner wall of the casing is coated with a refractory material for heat preservation.
Wherein, the rotation directions of the two screws are opposite.
The utility model has the advantages that: compared with the prior art, the utility model, novel double helix sludge drying machine is through setting up a plurality of cigarette folding plates in the casing to the dwell time of extension flue gas in the casing, so that abundant heat transfer, heat transfer efficiency is high, and the cost is low, and, the structure of mummification machine is simple and easy, takes up an area of fewly, and it is convenient to install, and the device leakproofness is good, and the operation is reliable, and the maintenance cost is low, is applicable to municipal sludge, industrial sludge's heat drying and handles, and the mud moisture content after the mummification can fall to 30-50%.
Drawings
FIG. 1 is a schematic structural diagram of a novel double-helix sludge drier.
FIG. 2 is a sectional view of a novel double helix sludge drier.
Reference numerals: the device comprises a machine shell 1, a helical blade 2, a cigarette folding plate 3, a cutting blade 4, a refractory material 5, a motor 6 and a screw 7.
Detailed Description
The invention will be further described with reference to the following examples.
The present embodiment of the novel double-helix sludge drying machine of the present invention is described by taking a drying machine with a treatment capacity of 60t/d (moisture content about 80%) and a high calorific value (dry basis) of chemical examination sludge of about 3200kcal/kg as an example.
Referring to fig. 1 and 2, the drying machine includes a casing 1 and a motor 6, two screws 7 are disposed at an interval at the bottom of the casing 1, the two screws 7 are provided with a plurality of continuous helical blades 2, the driving end of each screw 7 is in transmission connection with the motor 6, the two screws 7 can be driven by using different motors 6 respectively, or one motor 6 can be used to drive two screws 7 through a gear box, specifically, the setting can be performed according to actual requirements. The bottom of casing 1 is provided with the discharge opening, and the top of casing 1 is provided with feed inlet and exhanst gas outlet, and the end of casing 1 is provided with the flue gas import, and the direction that the flue gas flows is opposite with the direction that the material was carried like this, can further improve heat exchange efficiency.
The working process of the drying machine of the embodiment is as follows: wet sludge enters from a feed inlet of the shell 1, and two screws 7 at the bottom in the dryer correspondingly drive the helical blades 2 to slowly rotate and stir the materials and convey the materials forwards. The upper space in the dryer is a flue gas channel, and the flue gas directly contacts with the material for heat exchange, so that the moisture in the material is evaporated to dryness, and the drying purpose is achieved. The temperature of the flue gas inlet is about 900-. After the wet sludge is dried, the water content is reduced to 30-50%, and the wet sludge is discharged from a discharge hole at the tail part of the dryer.
As an improvement, a plurality of smoke baffle plates 3 arranged at intervals are arranged at the top in the machine shell 1 so as to prolong the retention time of smoke in the cylinder and ensure sufficient heat exchange.
In the present embodiment, each helical blade 2 is fixedly mounted with a blanking blade 4. In addition, the blanking blade 4 is disposed obliquely, that is, the extension line of the blanking blade 4 does not intersect with the axis of the helical blade 2. Its function is to enhance the agitation of the material and to prevent wet sludge from sticking to the spiral sheet. In addition, the rotation directions of the two screws 7 are opposite, so that the drying efficiency can be further improved.
In the present embodiment, the pitch of the helical blade 2 located in the second half of the screw 7 between two adjacent helical blades 2 gradually decreases in the material conveying direction. Because the sludge slowly moves from the front end to the rear end in the dryer, the volume of the sludge is gradually reduced along with the evaporation of moisture, so that the pitch of the middle-rear helical blades 2 is also gradually reduced, and the sludge can be effectively ensured to have enough retention time.
In this embodiment, the inner wall of the cabinet 1 is coated with a refractory 5 for thermal insulation. The refractory material 5 is laid on the inner wall surface of the cylinder body to prevent the cylinder body from burning out and deforming.
Compared with the prior art, the novel double-helix sludge drying machine has the advantages of simple structure, low manufacturing cost, simple structure, small occupied area, convenience in installation, good sealing performance of the device, reliability in operation, low maintenance cost, suitability for heat drying treatment of municipal sludge and industrial sludge, and capability of reducing the water content of the dried sludge to 30-50%. Have the advantages of a drum-type drying machine and a double-propeller drying machine, and improve and innovate the internal structure. Under the condition of the same sludge treatment amount, the equipment has small overall dimension, low manufacturing cost and low failure rate. The skid-mounted type arrangement is simple and convenient to install.
The above embodiments are only used for the explanation of the technical solution of the present invention, and can not be taken as the limitation of the structure of the present invention. Through this embodiment, the technical mode that also can obtain equal result of use through simple modification or equivalent replacement can be seen by ordinary skilled person and falls into the utility model discloses the right protection scope of technique.
Claims (6)
1. A novel double-helix sludge drier is characterized in that: the motor comprises a shell and a motor, wherein two screw rods arranged at intervals are arranged at the bottom in the shell, a plurality of continuous helical blades are arranged on each screw rod, and the driving end of each screw rod is in transmission connection with the motor; a plurality of cigarette folding plates which are arranged at intervals are arranged at the top in the shell;
the bottom of casing is provided with the discharge opening, the top of casing is provided with feed inlet and exhanst gas outlet, the end of casing is provided with the flue gas import.
2. The novel double-helix sludge drying machine according to claim 1, which is characterized in that: each helical blade is fixedly provided with a material cutting blade.
3. The novel double-helix sludge drying machine according to claim 2, which is characterized in that: the extension line of the cutting blade does not intersect with the axle center of the helical blade.
4. The novel double-helix sludge drying machine according to claim 1, which is characterized in that: and the screw pitch between two adjacent screw blades is gradually reduced along the material conveying direction.
5. The novel double-helix sludge drying machine according to claim 1, which is characterized in that: the inner wall of the shell is coated with a refractory material for heat preservation.
6. The novel double-helix sludge drying machine according to claim 1, which is characterized in that: the rotation directions of the two screws are opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020888199.7U CN212581742U (en) | 2020-05-22 | 2020-05-22 | Novel double-helix sludge drying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020888199.7U CN212581742U (en) | 2020-05-22 | 2020-05-22 | Novel double-helix sludge drying machine |
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| CN212581742U true CN212581742U (en) | 2021-02-23 |
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| CN202020888199.7U Active CN212581742U (en) | 2020-05-22 | 2020-05-22 | Novel double-helix sludge drying machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI833310B (en) * | 2022-07-29 | 2024-02-21 | 王振邦 | Sludge drying system and sludge drying and fermenting treatment method |
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2020
- 2020-05-22 CN CN202020888199.7U patent/CN212581742U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI833310B (en) * | 2022-07-29 | 2024-02-21 | 王振邦 | Sludge drying system and sludge drying and fermenting treatment method |
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