CN112159053A - Sludge low-temperature drying and granulating integrated system - Google Patents
Sludge low-temperature drying and granulating integrated system Download PDFInfo
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- CN112159053A CN112159053A CN202011042135.6A CN202011042135A CN112159053A CN 112159053 A CN112159053 A CN 112159053A CN 202011042135 A CN202011042135 A CN 202011042135A CN 112159053 A CN112159053 A CN 112159053A
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- shell
- granulation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/26—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic on endless conveyor belts
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sludge low-temperature drying and granulating integrated system, which comprises a shell and a hot air generator, wherein the bottom of the shell is provided with a hot air port, the hot air generator is communicated with the hot air port through a heat insulation pipeline, a kneading granulation conveying belt and a vibrating conveying belt are arranged in the shell, the inner wall of the shell is processed with a kneading cambered surface, a kneading granulation channel is formed between the adjacent kneading granulation conveying belts, and the inner side of the vibrating conveying belt is provided with a vibrator; the top of casing is provided with slitting device. The utility model provides an integrative system of mud low temperature mummification and granulation cuts mud equally through slitting device, and the rethread rubs granulation conveyer belt and rubs the kneading extrusion between the cambered surface and rubs the kneading extrusion of granulation passageway and makes mud rub the shaping, makes mud granule vibration dispersion through the vibrator at last, makes mud granule be heated evenly, has improved the efficiency and the homogeneity of mud granulation greatly, has economic energy-conserving, treatment process simple accurate, advantage that the treatment effect is good.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a low-temperature sludge drying and granulating integrated system.
Background
Along with the development of urban construction and the improvement of living standard, domestic sewage and industrial wastewater are increased, various environmental protection policies restrict the treatment of various kinds of sewage, sewage treatment facilities are more and more complete, but the amount of the sludge serving as a product after sewage treatment in China is very large, the yield is about 150 million tons every year, more than half of the sludge is not effectively treated, and serious harm is brought to the environment.
In the treatment of municipal sewage, a large number of derivatives occur, of which municipal sludge is one. Generally, municipal sludge is composed of various bacterial cells, colloids, organic debris, inorganic particles and the like, has a very complicated structure, and is a special heterogeneous body. From the aspect of properties, the organic matter accounts for more than half of the total amount, and the content of N, P and other nutrients is very high, wherein the content of N is 1.5-7.0% at most, and the content of P is 0.8-3%. The water quality treatment mode and the application technology of the municipal sewage can directly relate to the output of municipal sludge. In the process of sewage treatment, the generated sludge accounts for about 3-5 per mill of the total amount of the sewage. On the whole, municipal sludge in China has the characteristics of complex structure, high yield and the like, most of the municipal sludge is rich in organic matters, is easy to corrode, emits stink, and brings secondary pollution to the environment. The characteristics of municipal sludge in China just enable the municipal sludge to be used as fertilizer after treatment, and the municipal sludge has very high utilization potential.
At present, the method for carrying out batch treatment on municipal domestic sludge generally comprises a physical method and a biochemical method, wherein the physical method is mechanical treatment or drying treatment, wherein the mechanical dehydration mainly comprises plate frame/stacked screw dehydration, and simply means that water is extruded out. The water content after extrusion is generally between 60 and 85 percent, and the water content is still larger. The drying treatment is generally to treat the sludge after mechanical dehydration again to remove most of the moisture contained in the sludge, and then to perform harmless treatment on the residual slag or to convert the residual slag into other uses. Compared with a biochemical treatment mode, the physical drying treatment mode has obvious advantages, such as small occupied area of treatment equipment, short treatment period, difficult secondary pollution and the like. Drying is divided into high-temperature drying and low-temperature drying, the high-temperature drying can cause harmful substances in the mud to volatilize, and the poor stability and safety of high-temperature equipment are gradually eliminated. The low-temperature drying is to evaporate water in the sludge by utilizing circulating hot air (generally 40-45 ℃), and because the temperature is low, harmful substances cannot volatilize out and the temperature is low, the stability and the safety of equipment are greatly improved.
Before sludge is dried, the sludge needs to be granulated, and the conventional sludge granulator is generally a double-roller mutual extrusion type granulator as shown in CN207463173U, CN103316609A and the like and mainly comprises two rollers which rotate at constant speed and in opposite directions, wherein grooves are formed in the surfaces of the two rollers or the surface of one roller is provided with a groove, and the surface of the other roller is provided with a bulge, so that a granulation space is formed. The granulator with the structure has the following disadvantages: the grooves and the protrusions are mutually extruded to form particles, sludge is easily adhered in the grooves in the granulation process to influence the granulation efficiency and the granulation uniformity, the drying time is longer for sludge particles with larger size at the same temperature, and the drying time is shorter for sludge particles with small size and regular shape, so that the drying efficiency is low and energy is wasted easily if the particle size is not uniform.
In the prior art, some sludge drying and granulating integrated systems appear, but all have the defects of complex structure, incapability of realizing online cleaning, unsatisfactory drying treatment effect, high energy consumption, unstable operation and the like. Therefore, manual cleaning and maintenance are needed, and the maintenance cost is high. Therefore, it is necessary to develop a novel device and a sludge treatment method which have the advantages of good treatment effect, strong impact load resistance, economy, energy conservation, low capital investment and operating cost, simple and convenient treatment process and convenient maintenance and management, thereby solving the current sludge treatment problem.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a sludge low-temperature drying and granulating integrated system, which optimizes the drying and granulating process while improving the granulating efficiency and uniformity, improves the waste heat utilization rate, and achieves the purposes of economy, energy conservation, low capital investment and operating cost, simple and easy treatment process and good treatment effect.
The invention solves the problems through the following technical means:
a sludge low-temperature drying and granulating integrated system comprises a shell and a hot air generator, wherein the top of the shell is provided with a feed hopper, the bottom of the shell is provided with a hot air port and a discharge port, and the hot air generator is communicated with the hot air port through a heat insulation pipeline; at least two layers of kneading granulation conveying belts and at least one layer of vibration conveying belt are arranged in the shell, kneading cambered surfaces are processed on the inner wall of the shell corresponding to the discharge end of each layer of kneading granulation conveying belt, a kneading granulation channel is formed between every two adjacent kneading granulation conveying belts, and a vibrator is arranged on the inner side of each vibration conveying belt; the top of casing is provided with slitting device, slitting device includes with the sealed sliding fit's of casing top about knife rest, the actuating mechanism that drives the knife rest and reciprocate and parallel equidistant a plurality of slitting blades of installing in the knife rest bottom.
Furthermore, a plurality of hot air ports are uniformly arranged at the bottom of the shell, and each hot air port is communicated with the hot air generator through a heat insulation pipeline.
Furthermore, a waste heat utilization cavity made of a heat insulation material is arranged outside the shell, and a waste heat airflow hole is formed in the top of the side wall of the shell.
Furthermore, a baffle plate is arranged in the waste heat utilization cavity.
Furthermore, a condensed water drain pipe with a valve is arranged at the bottom of the waste heat utilization cavity.
Further, the lateral wall of feeder hopper is provided with mud thickness control panel.
Further, the mud thickness control panel passes through the telescopic link and is connected with the feeder hopper lateral wall.
Further, a scraper is arranged on the kneading granulation conveying belt.
Further, the scraper blade includes fixed plate body and the activity plate body that sealed slip cup jointed, the activity plate body is located the internal one end of fixed plate and passes through spring and fixed plate body inner wall connection.
Further, the driving mechanism is an inverted oil cylinder or an air cylinder.
Further, the kneading cambered surface is concentrically matched with the end part cambered surface of the kneading granulation conveying belt.
Further, the feed hopper is nested with the housing.
Compared with the prior art, the invention has the beneficial effects that:
1. the utility model provides an integrative system of mud low temperature mummification and granulation at first cuts mud equally through slitting blade, loops through again and rubs granulation conveyer belt and rubs the extrusion of rubbing between the cambered surface and rub the extrusion of rubbing of granulation passageway and make mud rub the shaping, makes mud granule vibration dispersion through the vibrator at last, avoids the adhesion, has ensured the uniformity of mud granule particle diameter, has improved the efficiency and the homogeneity of mud granulation greatly.
2. The integrative system of mud low temperature mummification and granulation of this application through setting up the waste heat utilization chamber, has improved waste heat utilization rate greatly.
3. According to the sludge low-temperature drying and granulating integrated system, the sludge thickness control plate is arranged on the side wall of the feed hopper, and the thickness of sludge entering the kneading and granulating conveyor belt can be controlled strictly through the sludge thickness control plate (the sludge thickness is controlled through the distance between the sludge thickness control plate and the kneading and granulating conveyor belt on the topmost layer), so that the uniformity of sludge granulation is further improved; the sludge thickness control board is driven to lift through the telescopic link, and the distance between the granulation conveyer belt is rubbed with the topmost layer to adjustable sludge thickness control board to adjust sludge thickness.
4. The utility model provides an integrative system of mud low temperature mummification and granulation, through set up the scraper blade on kneading the granulation conveyer belt, on the one hand, can strike off the mud that bonds on kneading the cambered surface through the scraper blade, and on the other hand, the scraper blade can strike off adjacent mud on kneading the granulation conveyer belt. Therefore, the scraper can further improve the efficiency and uniformity of granulation.
5. The sludge is back-turned and conveyed on the kneading granulation conveying belt and the vibration conveying belt, so that the whole granulation space is saved.
In a word, the sludge low-temperature drying and granulating integrated system has the advantages of economy, energy conservation, simple and easy treatment process and good treatment effect.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of a squeegee according to an embodiment of the invention.
In the figure: 1- -a housing; 2-vibrating the conveyor belt; 3- -vibrator; 4- -a scraper; 5- -rub the cambered surface; 6- -kneading granulation conveyer belt; 7- -a feed hopper; 8, a telescopic rod; 9- -sludge thickness control board; 10-a tool holder; 11- -slitting blade; 12- -a drive mechanism; 13- -sludge; 14- -a discharge port; 15- -hot air generator; 16- -heat preservation pipeline; 17- -hot air port; 18- -residual heat utilization cavity; 19- -residual heat airflow hole; 20- -baffle plate; 21- -a valve; 22- -condensate drain; 41- -fixed plate body; 42- -a movable plate body; 43- -spring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1-2, the present embodiment discloses an integrated system for low-temperature drying and granulation of sludge, which includes a housing 1, a hot air generator 15, a feeding hopper 7 and a discharging port 14, wherein the bottom of the housing is uniformly provided with a plurality of hot air ports 17, and each hot air port is communicated with the hot air generator through a heat insulation pipe 16. Feeder hopper 7 and discharge gate 14 set up respectively in the top and the bottom of casing, and one side of feeder hopper bottom export is provided with mud thickness control panel 9, mud thickness control panel 9 passes through telescopic link 8 and is connected with feeder hopper 7 lateral wall, telescopic link 8 is including the barrel and the body of rod that slide cup joints, realize sliding lock through locking screw between the barrel and the body of rod. The thickness of the sludge entering the kneading granulation conveyor belt can be controlled strictly through the sludge thickness control plate 9 (the sludge thickness is controlled through the distance between the sludge thickness control plate and the topmost kneading granulation conveyor belt); the sludge thickness control board is driven to lift through the telescopic link, and the distance between the granulation conveyer belt is rubbed with the topmost layer to adjustable sludge thickness control board to adjust sludge thickness. In some preferred embodiments, the hopper 7 is a nested fit with the housing 1 so that the hopper can be removed to adjust the sludge thickness control plate.
At least two layers of kneading granulation conveying belts 6 and at least one layer of vibrating conveying belt 2 are arranged in the shell 1, in the embodiment, the two layers of kneading granulation conveying belts 6 and the three layers of vibrating conveying belts 2 are arranged, and the kneading granulation conveying belts and the vibrating conveying belts are turned back and conveyed in sequence; and a kneading cambered surface 5 is processed on the inner wall of the shell 1 corresponding to the discharge end of each layer of kneading granulation conveying belt 6, the kneading cambered surface is concentrically matched with the end part cambered surface of each kneading granulation conveying belt, and a kneading granulation channel is formed between every two adjacent kneading granulation conveying belts.
Be provided with scraper blade 4 on kneading granulation conveyer belt 6, on the one hand, can strike off the mud that bonds on kneading cambered surface 5 through scraper blade 4, on the other hand, scraper blade 4 can strike off the mud on adjacent kneading granulation conveyer belt 6. Preferably, the scraper includes a fixed plate 41 and a movable plate 42 which are hermetically and slidably sleeved, and one end of the movable plate 42 located in the fixed plate 41 is connected with the inner wall of the fixed plate through a spring 43. By adopting the structural design, the height of the whole scraper can be adjusted in a self-adaptive elastic mode, so that the use requirements of different kneading granulation conveying belt distances and different kneading granulation conveying belt and kneading cambered surface distances are met.
A vibrator 3 is installed on the inner side of the vibration conveyor belt 2. The top of the shell 1 is provided with a slitting device, the slitting device comprises a tool rest 10 which is in up-and-down sealing sliding fit with the top of the shell, a driving mechanism 12 for driving the tool rest to move up and down, and a plurality of slitting blades 11 which are arranged at the bottom of the tool rest in parallel at equal intervals, and the driving mechanism is an inverted oil cylinder or an inverted air cylinder.
The shell is externally provided with a waste heat utilization cavity 18 made of heat insulation materials, and the top of the side wall of the shell is provided with a waste heat airflow hole 19. Steam generated in the drying and granulating process flows into the waste heat utilization cavity from the waste heat airflow hole, and the waste heat utilization cavity has a heat preservation effect and can absorb the steam waste heat for drying. Preferably, a baffle plate 20 is arranged in the waste heat utilization cavity, and the steam flows back under the limit of the baffle plate so as to extend the residence time of the steam in the waste heat utilization cavity, thereby further improving the waste heat absorption rate. And a condensate water drain pipe 22 with a valve 21 is arranged at the bottom of the waste heat utilization cavity so as to discharge steam condensate water in time.
During drying granulation, sludge 13 is poured from a feeding hopper, falls onto the topmost kneading granulation conveyor belt 6 from an outlet at the bottom of the feeding hopper 7, the thickness of the sludge is controlled by a sludge thickness control plate 9, after the sludge is fully paved on the top layer of the topmost kneading granulation conveyor belt, a slitting device is started, a slitting blade 11 is driven by a driving mechanism 12 to move downwards, the sludge is equally divided and cut, then the sludge sequentially passes through kneading extrusion between the kneading granulation conveyor belt and a kneading arc surface and kneading extrusion of a kneading granulation channel to knead and shape the sludge, finally, the sludge flows back to flow through a vibration conveyor belt and flows out from a discharge port, and when the sludge is conveyed on the vibration conveyor belt, sludge particles are vibrated and dispersed by a vibrator, so that adhesion is avoided, and the heating uniformity is improved. Meanwhile, in the granulation process, hot air is blown in from the hot air port to dry sludge particles.
It is necessary to supplement that the cooperation of the components is controlled by a control unit, which is prior art and will not be described in detail here.
In conclusion, by adopting the sludge low-temperature drying and granulating integrated system, the efficiency and uniformity of sludge granulation are greatly improved, and energy consumption is saved.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. The utility model provides a sludge low temperature mummification and integrative system of granulation which characterized in that: the device comprises a shell (1) and a hot air generator (15), wherein the top of the shell is provided with a feed hopper (7), the bottom of the shell is provided with a hot air port (17) and a discharge port (14), and the hot air generator is communicated with the hot air port through a heat insulation pipeline (16); at least two layers of kneading granulation conveying belts (6) and at least one layer of vibrating conveying belt (2) are arranged in the shell, kneading arc surfaces (5) are processed at positions, corresponding to the discharge ends of the kneading granulation conveying belts, on the inner wall of the shell, kneading granulation channels are formed between adjacent kneading granulation conveying belts, and vibrators (3) are installed on the inner sides of the vibrating conveying belts; the top of casing is provided with the slitting device, the slitting device includes with sealed sliding fit's knife rest (10) about the casing top, drive mechanism (12) that the drive knife rest reciprocated and parallel equidistant a plurality of slitting blades (11) of installing in the knife rest bottom.
2. The integrated system for low-temperature drying and granulating sludge as claimed in claim 1, wherein the integrated system comprises: a plurality of hot air ports (17) are uniformly formed in the bottom of the shell, and each hot air port is communicated with a hot air generator through a heat insulation pipeline.
3. The integrated system for low-temperature drying and granulating sludge as claimed in claim 2, wherein: the shell is externally provided with a waste heat utilization cavity (18) made of heat insulation materials, and the top of the side wall of the shell is provided with a waste heat airflow hole (19).
4. The integrated system for low-temperature drying and granulating sludge as claimed in claim 3, wherein the integrated system comprises: and a baffle plate (20) is arranged in the waste heat utilization cavity.
5. The integrated system for low-temperature drying and granulating sludge as claimed in claim 4, wherein the integrated system comprises: and a condensed water drain pipe (22) with a valve (21) is arranged at the bottom of the waste heat utilization cavity.
6. The integrated system for low-temperature drying and granulating sludge as claimed in claim 5, wherein the integrated system comprises: the lateral wall of the feed hopper is provided with a sludge thickness control plate (9).
7. The integrated system for low-temperature drying and granulating sludge as claimed in claim 6, wherein the integrated system comprises: the sludge thickness control plate is connected with the side wall of the feed hopper through an expansion rod (8).
8. The integrated system for low-temperature drying and granulating sludge as claimed in any one of claims 1 to 7, wherein: and a scraping plate (4) is arranged on the kneading granulation conveying belt.
9. The integrated system for low-temperature drying and granulating sludge as claimed in claim 8, wherein: the scraper blade is including sealed fixed plate body (41) and the activity plate body (42) that slide cup joints, the one end that activity plate body (42) are located fixed plate body (41) is passed through spring (43) and is connected with fixed plate body inner wall.
10. The integrated system for low-temperature drying and granulating sludge as claimed in claim 9, wherein: the feed hopper (7) is in nested fit with the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042135.6A CN112159053A (en) | 2020-09-28 | 2020-09-28 | Sludge low-temperature drying and granulating integrated system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042135.6A CN112159053A (en) | 2020-09-28 | 2020-09-28 | Sludge low-temperature drying and granulating integrated system |
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| CN112159053A true CN112159053A (en) | 2021-01-01 |
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| CN202011042135.6A Pending CN112159053A (en) | 2020-09-28 | 2020-09-28 | Sludge low-temperature drying and granulating integrated system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115779789A (en) * | 2022-12-15 | 2023-03-14 | 杭州富阳康华制药机械有限公司 | Intelligent low-temperature dynamic sterilization granulation device for medicine and control method thereof |
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