CN113003915B - Belt type sludge low-temperature drying device and drying method based on waste heat coupling utilization - Google Patents
Belt type sludge low-temperature drying device and drying method based on waste heat coupling utilization Download PDFInfo
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- CN113003915B CN113003915B CN202110172225.5A CN202110172225A CN113003915B CN 113003915 B CN113003915 B CN 113003915B CN 202110172225 A CN202110172225 A CN 202110172225A CN 113003915 B CN113003915 B CN 113003915B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
- B01D46/681—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
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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
- C02F2303/00—Specific treatment goals
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
Abstract
The invention belongs to the technical field of sludge drying treatment, and particularly relates to a belt type sludge low-temperature drying device and a drying method based on waste heat coupling utilization, which comprise a shell; a spiral feeder is arranged on one side of the top end of the shell, and a feeding cylinder is arranged on the spiral feeder; a heat inlet cylinder and a discharge cylinder are arranged on the side wall of the shell close to the spiral feeder, and the heat inlet cylinder is positioned on the upper side of the discharge cylinder; a transmission mechanism is arranged in the shell; a tail gas treatment box is arranged on the side wall of the shell far away from the spiral feeder; the invention provides a belt type sludge low-temperature drying device and a belt type sludge low-temperature drying method based on waste heat coupling utilization, which aim to solve the problems that sludge is dried by using flue gas waste heat generated by boiler coal, tail gas generated after drying is generally directly input into a tail gas waste heat utilization system, but the tail gas carries a plurality of coal-fired waste particles, sludge organic matter impurities and odor, and the emission and utilization of the dried tail gas are influenced if the tail gas is not treated.
Description
Technical Field
The invention belongs to the technical field of sludge drying treatment, and particularly relates to a belt type sludge low-temperature drying device and a drying method based on waste heat coupling utilization.
Background
Sludge produced by a water treatment plant is rich in harmful substances such as organic humus, bacterial thalli, parasitic ova, heavy metals and the like, and seriously pollutes the environment if harmless treatment is not carried out. At present, drying incineration is a mainstream technical route for treating sludge on a large scale at low cost, and can realize 'harmlessness, stabilization, recycling and greening' of sludge treatment.
Also some technical scheme about sludge drying treatment technique have appeared among the prior art, have disclosed a sludge drying machine like a chinese patent with application number 2018105666939, which comprises a housin, the casing left and right sides outer wall is provided with discharge gate and feed inlet respectively, and is provided with the liquid reserve tank bottom the feed inlet, the terminal surface is provided with step motor before the discharge gate, casing top right side is provided with the desiccator, the casing top is provided with the dust catcher, and the right side play dirt mouth of dust catcher passes through the dust removal pipe and is connected with the rose box, the bottom of dust absorption mouth is provided with the air water separation layer.
In the prior art, the sludge is dried by using the waste heat of the flue gas generated by the boiler coal, the dried tail gas is generally directly input into a tail gas waste heat utilization system, but the tail gas can carry some waste particles of the coal, sludge organic matter impurities and odor, and the emission and the utilization of the dried tail gas can be influenced if the tail gas is not treated.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that the sludge is dried by using the waste heat of the flue gas generated by the coal burning of the boiler, the tail gas generated after drying is generally directly input into a tail gas waste heat utilization system, but the tail gas can carry some waste particles of the coal burning, sludge organic matter impurities and odor, and the emission and the utilization of the dried tail gas can be influenced if the tail gas is not treated, the invention provides the belt type low-temperature sludge drying device and the drying method based on the coupling utilization of the waste heat.
The technical scheme adopted by the invention for solving the technical problem is as follows: the invention relates to a belt type sludge low-temperature drying device and a drying method based on waste heat coupling utilization, which comprises a shell; a spiral feeder is arranged on one side of the top end of the shell, and a feeding cylinder is arranged on the spiral feeder; a heat inlet cylinder and a discharge cylinder are arranged on the side wall of the shell close to the spiral feeder, and the heat inlet cylinder is positioned on the upper side of the discharge cylinder; a transmission mechanism is arranged in the shell; a tail gas treatment box is arranged on the side wall of the shell far away from the spiral feeder; an air inlet is formed in the side wall of one side in the tail gas treatment box, the air inlet is communicated with the inside of the shell, and an air outlet is formed in the side wall of the other side; the side wall of the tail gas treatment box close to the air outlet is provided with active carbon, and a filter screen is arranged in the tail gas treatment box; during operation, in the prior art, the waste heat of flue gas generated by boiler coal is utilized to dry sludge, the dried tail gas is generally directly input into a tail gas waste heat utilization system, but the tail gas can carry some waste particles of coal, sludge organic matter impurities and odor, and the emission and utilization of the dried tail gas can be influenced if the tail gas is not treated.
Preferably, a first rotating shaft is rotatably connected in the tail gas treatment tank; a group of fan blades is fixedly connected to the first rotating shaft; the position of the air inlet is arranged at a position far away from the central line of the tail gas treatment box; the inner side walls of the top end and the bottom end of the tail gas treatment box are respectively provided with a first groove; the top end and the bottom end of the filter screen are fixedly connected with connecting plates, and the filter screen is fixedly connected to the side wall of the first groove through a spring; a group of concave-convex arc-shaped grooves are formed in the bottom of the first groove, and the arc-shaped grooves of the pair of first grooves are staggered with each other; the connecting plate is connected to the bottom of the first groove in a sliding manner; the fan blades are mutually contacted with the filter screen when rotating; the during operation, when mummification tail gas enters, because of the skew tail gas treatment box central line of inlet port, can blow the flabellum and drive first axis of rotation and rotate when admitting air, the flabellum rotates the in-process and can promote the filter screen and make a round trip to be reciprocating motion in first recess, at the filter screen removal in-process, the connecting plate moves on the arc wall of first recess tank bottom, can drive the filter screen and reciprocate when controlling reciprocating motion, can clear up some and bond impurity on the filter screen, the impurity that prevents long-time filtration tail gas bonds on the filter screen, the influence is to the processing of tail gas, and the kinetic energy of tail gas partly turns into the rotation energy of flabellum, can weaken the flow velocity of tail gas, let the impurity in the absorption tail gas that the active carbon can be better.
Preferably, the end part of the fan blade far away from the first rotating shaft is a trapezoidal end; a second groove is formed in the end part of the trapezoidal end of the fan blade; a pressing block is connected in the second groove in a sealing and sliding manner; the end part of the pressing block, which is far away from the bottom of the second groove, is rotatably connected with a roller; a group of first cavities are formed in the side walls of the two sides of the trapezoidal end of each fan blade; the first cavities of one group increase in sequence in the direction away from the central line of the fan blade; a second push plate is connected in the first cavity in a sealing and sliding manner; the side wall of the second push plate, which is far away from the top end of the fan blade, is fixedly connected to the side wall of the first cavity through a spring, and the other side wall of the second push plate is fixedly connected with a top rod; the ejector rod penetrates through the first cavity and extends out of the fan blade; the rodless cavity of the first cavity is communicated with the sealing cavity of the second groove; when the fan blade vibration filter screen works, when the end part of the fan blade is in contact with the filter screen, the filter screen can extrude the press block, the press block moves downwards in the second groove, gas in the second groove enters the rodless cavity of the first cavity, the first push plate is pushed to move upwards, the ejector rods are driven to extend outwards and collide with the filter screen, the filter screen is vibrated, impurities attached to the filter screen are shaken, the lengths of a group of first cavities are sequentially increased, when the ejector rods are pushed by the first push plate to shake the filter screen outwards, the end parts of the group of ejector rods are positioned on the same horizontal plane, the filter screen can be shaken in sequence, and the shaking effect is enhanced; because the tip of flabellum can promote the filter screen and remove, the tip of flabellum and filter screen can produce relative slip, for preventing the promotion to the filter screen of sliding friction power influence, be provided with the gyro wheel on the flabellum tip, make things convenient for the promotion of flabellum to the filter screen.
Preferably, a third groove is formed in the end part, far away from the first push plate, of the ejector rod; the bottom of the third groove is fixedly connected with a second push plate through a spring, and the second push plate is connected to the inner wall of the third groove in a sealing and sliding manner; a push ball is fixedly connected to the second push plate; an elastic curved film is fixedly connected to the side wall of the third groove close to the opening, and the elastic curved film faces the outside of the opening of the third groove; a group of cleaning brushes is fixedly connected to the elastic curved membrane; the sealing cavity of the third groove is communicated with the rod cavity of the first cavity; the during operation, because of the sealed chamber intercommunication each other that has pole chamber and third recess in the first cavity, when first push pedal promotes the ejector pin and moves up, the gaseous entering of having the pole chamber in the first cavity this moment is the sealed intracavity of third recess, promote the outside removal of second push pedal, drive the crooked membrane of the outside jack-up elasticity of pushing away the ball, the crooked membrane of elasticity promotes outwards, let the rigid coupling open at the crooked epimembranal brush that cleans of elasticity, after ejector pin vibrations filter screen, relative movement can take place for flabellum and filter screen this moment, move the in-process, clean the brush and further clean attached to the filter screen on impurity, keep the filtration efficiency of filter screen.
Preferably, a material scraping part is arranged between the ejector rods; the scraping piece comprises a scraping plate and a telescopic rod; a scraper is hinged between the top rods through a telescopic rod; one end of the telescopic rod is hinged to the scraping plate, the other end of the telescopic rod is hinged to the ejector rod, and a torsional spring is arranged at a hinged point; the during operation, when the ejector pin outwards promoted, because of a set of ejector pin tip when with the filter screen contact, all be in the coplanar, when the ejector pin shifts up, can promote the inside shrink of telescopic link, the jack-up scraper blade, when a set of ejector pin tip all with the filter screen contact, the top and the filter screen contact of scraper blade, when the flabellum promoted the filter screen and removes, promoted the scraper blade and scrape the material on the filter screen, prevent that some adhesion nature impurity from depending on the filter screen, further clear up the impurity on the filter screen.
Preferably, a sealing cavity is arranged in the telescopic rod; a fourth groove is formed in the scraper; an elastic bag is arranged in the fourth groove; the elastic bag is communicated with the sealed cavity in the telescopic rod; the during operation, be provided with the fourth recess on the scraper blade top, when the ejector pin shifts up, promote the telescopic link shrink, the inside sealed chamber of telescopic link gas of this moment can get into in the elastic bag, the elastic bag is inflated and is set up the sclerosis, when scraper blade and filter screen contact each other, the vertical sclerosis of elastic bag nevertheless has elasticity this moment, can contact each other with the filter screen, at scraper blade removal in-process, the elastic bag removes on the filter screen, can take place reciprocating collision with the filter screen at the elastic bag removal in-process, increase the effect of cleaning of scraper blade.
Preferably, a group of vibration balls is fixedly connected to the elastic bag; the during operation, when elasticity bag and filter screen reciprocating collision, vibrations ball can increase the vibrations effect of elasticity bag, lets the filter screen promote the in-process at the flabellum, can take place the motion of coming back and forth a little under the effect of the spring of filter screen and the vibrations ball of elasticity bag, further strengthens cleaning the effect of cleaning brush and scraper blade.
A drying method of a belt type sludge low-temperature drying device based on waste heat coupling utilization is suitable for the belt type sludge low-temperature drying device based on waste heat coupling utilization, and comprises the following steps:
s1: putting the sludge raw material subjected to preliminary dehydration into a feeding cylinder, performing rotary feeding by a spiral feeder, crushing the sludge, simultaneously connecting a heat feeding cylinder and a boiler chimney, and feeding a large amount of heat carried by boiler flue gas into a sludge drying machine;
s2: broken sludge entering the shell falls on a conveying belt of the conveying mechanism, heat of boiler flue gas enters a sludge drying machine to dry sludge flatly laid on the conveying belt, and generated tail gas is input into a waste heat utilization system after being treated by a tail gas treatment box
S3: and discharging the dried sludge from the discharge barrel, mixing the dried sludge with the fire coal, and burning and heating the boiler by using the mixture as fuel.
The invention has the following beneficial effects:
1. according to the belt type low-temperature sludge drying device and the drying method based on waste heat coupling utilization, the tail gas treatment box is used for separating and deodorizing impurities of the dried tail gas, the dried tail gas enters the tail gas treatment box through the air inlet hole, solid impurities in the dried tail gas are removed through the filter screen, odor and sulfur molecules in the tail gas are adsorbed by using active carbon, the treated tail gas is discharged and utilized through the air outlet hole, the heat of the dried and alive tail gas is favorably fully reused, and the external environment is not polluted.
2. According to the belt type low-temperature sludge drying device and drying method based on waste heat coupling utilization, through mutual matching of the ejector rod, the cleaning brush, the scraper and the elastic bag, when the fan blades push the filter screen to do reciprocating motion, impurities adhered to the filter screen in the tail gas filtering process of the filter screen can be cleaned, the filter screen is prevented from being reduced in filtering efficiency due to excessive impurities in the long-time working process of the filter screen, and the cleanness of the surface of the filter screen is guaranteed.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a cross-sectional view of the exhaust treatment tank;
FIG. 3 is a top view of the blade end;
FIG. 4 is an enlarged view of area A of FIG. 3;
FIG. 5 is an enlarged view of area B of FIG. 4;
FIG. 6 is a schematic flow chart of a drying method of a belt-type sludge low-temperature drying device based on waste heat coupling utilization;
in the figure: 1. a housing; 11. a feeding cylinder; 12. a screw feeder; 13. a heat inlet cylinder; 14. a discharging barrel; 2. a tail gas treatment tank; 21. an air inlet; 22. an air outlet; 23. activated carbon; 24. a filter screen; 3. a first rotating shaft; 31. a fan blade; 32. a connecting plate; 33. a first groove; 4. a second groove; 41. briquetting; 42. a first cavity; 43. a first push plate; 44. a top rod; 5. a third groove; 51. a second push plate; 52. pushing the ball; 53. an elastic curved film; 54. cleaning a brush; 6. a telescopic rod; 61. a squeegee; 62. a fourth groove; 63. an elastic bag; 64. the ball is shaken.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 6, the belt-type sludge low-temperature drying device and drying method based on waste heat coupling utilization of the invention comprises a shell 1; a spiral feeder 12 is arranged on one side of the top end of the shell 1, and a feeding cylinder 11 is arranged on the spiral feeder 12; a heat inlet cylinder 13 and a discharge cylinder 14 are arranged on the side wall of the shell 1 close to the spiral feeder 12, and the heat inlet cylinder 13 is positioned on the upper side of the discharge cylinder 14; a transmission mechanism is arranged in the shell 1; a tail gas treatment box 2 is arranged on the side wall of the shell 1 far away from the spiral feeder 12; an air inlet 21 is formed in the side wall of one side in the tail gas treatment box 2, the air inlet 21 is communicated with the inside of the shell 1, and an air outlet 22 is formed in the side wall of the other side; the side wall of the tail gas treatment box 2 close to the gas outlet 22 is provided with active carbon 23, and a filter screen 24 is arranged in the box; when the tail gas treatment device works, in the prior art, the flue gas waste heat generated by boiler coal is utilized to dry sludge, the tail gas generated after drying is generally directly input into a tail gas waste heat utilization system, but the tail gas can carry some coal-fired waste particles, sludge organic matter impurities and odor, and the emission and utilization of the dried tail gas can be influenced if the tail gas is not treated.
As an embodiment of the present invention, a first rotating shaft 3 is rotatably connected to the exhaust gas treatment tank 2; a set of fan blades 31 is fixedly connected to the first rotating shaft 3; the position of the air inlet 21 is arranged at a position far away from the central line of the tail gas treatment box 2; the inner side walls of the top end and the bottom end of the tail gas treatment box 2 are respectively provided with a first groove 33; the top end and the bottom end of the filter screen 24 are fixedly connected with connecting plates 32, and the filter screen 24 is fixedly connected to the side wall of the first groove 33 through a spring; a group of concave-convex arc-shaped grooves are formed in the bottom of the first groove 33, and the arc-shaped grooves of the pair of first grooves 33 are staggered; the connecting plate 32 is connected to the bottom of the first groove 33 in a sliding manner; the fan blades 31 are contacted with the filter screen 24 when rotating; the during operation, when mummification tail gas enters, 2 central lines of case are handled to skew tail gas because of inlet port 21, can blow flabellum 31 and drive first axis of rotation 3 and rotate during admitting air, flabellum 31 rotates the in-process and can promote filter screen 24 and make a round trip to be reciprocating motion in first recess 33, remove the in-process at filter screen 24, connecting plate 32 removes on the arc wall of first recess 33 tank bottom, can drive filter screen 24 and reciprocate when controlling reciprocating motion, can clear up some and bond impurity on filter screen 24, prevent that long-time filtration tail gas's impurity from bonding on filter screen 24, the influence is to the processing of tail gas, and the kinetic energy part of tail gas turns into flabellum 31's rotation energy, can weaken the velocity of flow of tail gas, let the impurity in the absorption tail gas that active carbon 23 can be better.
As an embodiment of the present invention, the end of the fan blade 31 away from the first rotating shaft 3 is a trapezoidal end; a second groove 4 is formed in the end part of the trapezoidal end of the fan blade 31; a pressing block 41 is connected in the second groove 4 in a sealing and sliding manner; the end part of the pressing block 41, which is far away from the bottom of the second groove 4, is rotatably connected with a roller; a group of first cavities 42 are formed in the side walls of the two sides of the trapezoidal end of the fan blade 31; the first cavities 42 are sequentially increased in the direction away from the central line of the fan blade 31; a second push plate 51 is connected in the first cavity 42 in a sealing and sliding manner; the side wall of the second push plate 51 far away from the top end of the fan blade 31 is fixedly connected to the side wall of the first cavity 42 through a spring, and the other side wall of the second push plate 51 is fixedly connected with a push rod 44; the top rod 44 penetrates through the first cavity 42 and extends out of the fan blade 31; the rodless cavity of the first cavity 42 and the sealed cavity of the second groove 4 are communicated with each other; when the fan blade 31 and the filter screen 24 are in contact with each other, the filter screen 24 extrudes the pressing block 41, the pressing block 41 moves downwards in the second groove 4, the gas in the second groove 4 enters the rodless cavity of the first cavity 42, the first pushing plate 43 is pushed to move upwards, the pushing rods 44 are driven to extend outwards and collide with the filter screen 24, the filter screen 24 is vibrated, impurities attached to the filter screen 24 are shaken, the lengths of a group of first cavities 42 are sequentially increased, when the pushing rods 44 are pushed by the first pushing plate 43 to vibrate the filter screen 24 outwards, the ends of the group of pushing rods 44 are positioned on the same horizontal plane, the filter screen 24 can be vibrated sequentially, and the vibration effect is enhanced; because the end of the fan blade 31 can push the filter screen 24 to move, the end of the fan blade 31 and the filter screen 24 can slide relatively, and in order to prevent the influence of sliding friction on the pushing of the filter screen 24, the end of the fan blade 31 is provided with a roller wheel, which is convenient for the fan blade 31 to push the filter screen 24.
As an embodiment of the present invention, a third groove 5 is formed on the end of the top rod 44 away from the first push plate 43; a second push plate 51 is fixedly connected to the bottom of the third groove 5 through a spring, and the second push plate 51 is connected to the inner wall of the third groove 5 in a sealing and sliding manner; a push ball 52 is fixedly connected to the second push plate 51; an elastic curved membrane 53 is fixedly connected to the side wall of the third groove 5 close to the opening, and the elastic curved membrane 53 faces the outside of the opening of the third groove 5; a group of cleaning brushes 54 is fixedly connected to the elastic curved membrane 53; the sealing cavity of the third groove 5 and the rod cavity of the first cavity 42 are communicated with each other; during operation, because the rod cavity in the first cavity 42 and the seal cavity of the third groove 5 are communicated with each other, when the first push plate 43 pushes the push rod 44 to move upward, at this time, the gas in the rod cavity in the first cavity 42 enters the seal cavity of the third groove 5, and pushes the second push plate 51 to move outward, so as to drive the push ball 52 to jack up the elastic curved membrane 53 outward, and the elastic curved membrane 53 pushes outward, so that the cleaning brush 54 fixedly connected to the elastic curved membrane 53 is opened, after the push rod 44 vibrates the filter screen 24, at this time, the fan blade 31 and the filter screen 24 can move relatively, and during moving, the cleaning brush 54 further cleans impurities attached to the filter screen 24, and the filtering efficiency of the filter screen 24 is maintained.
As an embodiment of the present invention, a scraping member is disposed between the push rods 44; the scraping piece comprises a scraping plate 61 and an expansion rod 6; a scraping plate 61 is hinged between the top rods 44 through a telescopic rod 6; one end of the telescopic rod 6 is hinged on the scraping plate 61, the other end of the telescopic rod is hinged on the ejector rod 44, and a hinged point is provided with a torsion spring; the during operation, when ejector pin 44 outwards promotes, because of a set of ejector pin 44 tip when contacting with filter screen 24, all be in the coplanar, when ejector pin 44 shifts up, can promote the inside shrink of telescopic link 6, jack-up scraper blade 61, when a set of ejector pin 44 tip all contacted with filter screen 24, the top and the filter screen 24 of scraper blade 61 contact each other, when flabellum 31 promoted filter screen 24 and removes, promote scraper blade 61 and scrape the material on filter screen 24, prevent that some adhesive impurity from depending on filter screen 24, further clear up the impurity on the filter screen 24.
As an embodiment of the present invention, a sealed cavity is arranged in the telescopic rod 6; a fourth groove 62 is formed in the scraper 61; an elastic bag 63 is arranged in the fourth groove 62; the elastic bag 63 is communicated with a sealed cavity in the telescopic rod 6; during operation, be provided with fourth recess 62 at scraper blade 61 top, when ejector pin 44 shifts up, promote telescopic link 6 to contract, the gas of the inside sealed chamber of telescopic link 6 can get into in the elasticity bag 63 this moment, the elasticity bag 63 inflates and stands up the sclerosis, when scraper blade 61 and filter screen 24 contact each other, the vertical sclerosis of elasticity bag 63 has elasticity but this moment, can contact each other with filter screen 24, in scraper blade 61 removes the in-process, elasticity bag 63 removes on filter screen 24, can take place reciprocating collision with filter screen 24 in elasticity bag 63 removes the in-process, increase scraper blade 61's cleaning effect.
As an embodiment of the present invention, a set of vibration balls 64 is fixed on the elastic bag 63; during operation, when the elastic bag 63 collides with the filter screen 24 in a reciprocating manner, the vibration ball 64 increases the vibration effect of the elastic bag 63, so that the filter screen 24 moves back and forth slightly under the action of the spring of the filter screen 24 and the vibration ball 64 of the elastic bag 63 in the pushing process of the fan blades 31, and the cleaning effect of the cleaning brush 54 and the scraper 61 is further enhanced.
The working principle is as follows: the tail gas treatment box 2 is used for carrying out impurity separation and deodorization on the dried tail gas, the dried tail gas enters the tail gas treatment box 2 through the air inlet hole 21, solid impurities in the dried tail gas are removed through the filter screen 24, odor and sulfur molecules in the tail gas are adsorbed by the activated carbon 23, and the treated tail gas is discharged and utilized through the air outlet hole 22, so that the heat of the dry tail gas can be fully utilized again, and the external environment cannot be polluted; when the dried tail gas enters, because the air inlet 21 deviates from the central line of the tail gas treatment box 2, the fan blade 31 is blown to drive the first rotating shaft 3 to rotate when the dried tail gas enters, the filter screen 24 is pushed to reciprocate in the first groove 33 when the fan blade 31 rotates, the connecting plate 32 moves on the arc-shaped groove at the bottom of the first groove 33 when the filter screen 24 moves, the filter screen 24 is driven to move up and down while reciprocating left and right, when the end part of the fan blade 31 and the filter screen 24 are contacted with each other, the filter screen 24 can extrude the pressing block 41 at the moment, the pressing block 41 moves down in the second groove 4, the gas in the second groove 4 enters the rodless cavity of the first cavity 42, the first push plate 43 is pushed to move up, the push rod 44 is driven to extend outwards and collide with the filter screen 24, when the first push plate 43 pushes the push rod 44 to move upwards, the gas with the rod cavity in the first cavity 42 enters the sealed cavity of the third groove 5 at the moment, the second push plate 51 moves outwards, the push ball 52 is driven to push the flexible curved membrane 53 outwards, the flexible curved membrane 53 pushes outwards, the flexible membrane 53 pushes the vibration, the flexible membrane 54 is fixed on the flexible membrane 53, and the filter screen 24 can be cleaned; when the push rods 44 push outwards, because the end parts of a group of push rods 44 are in contact with the filter screen 24 and are all in the same plane, when the push rods 44 move upwards, the telescopic rods 6 are pushed to contract inwards, the scraper 61 is pushed up, when the end parts of a group of push rods 44 are in contact with the filter screen 24, the top ends of the scraper 61 and the filter screen 24 are in mutual contact, when the push rods 44 move upwards, the telescopic rods 6 are pushed to contract, at the moment, gas in a sealed cavity inside the telescopic rods 6 can enter the elastic bags 63, the elastic bags 63 are inflated to stand up and harden, when the scraper 61 and the filter screen 24 are in mutual contact, at the moment, the elastic bags 63 are vertically hardened and have elasticity and can be in mutual contact with the filter screen 24, when the scraper 61 moves, the elastic bags 63 move on the filter screen 24 and can collide with the filter screen 24 in a reciprocating manner in the moving process of the elastic bags 63, and the cleaning effect of the scraper 61 is improved.
A drying method of a belt type sludge low-temperature drying device based on waste heat coupling utilization is suitable for the belt type sludge low-temperature drying device based on waste heat coupling utilization, and comprises the following steps:
s1: putting the sludge raw material subjected to preliminary dehydration into a feeding cylinder, performing rotary feeding by a spiral feeder, crushing the sludge, and simultaneously connecting a heat feeding cylinder and a boiler chimney mutually, wherein boiler flue gas carries a large amount of heat to enter a sludge drying machine;
s2: the crushed sludge entering the shell falls on a conveying belt of a conveying mechanism, the heat of the boiler flue gas enters a sludge drier to dry the sludge flatly laid on the conveying belt, and the generated tail gas is input into a waste heat utilization system after being treated by a tail gas treatment box;
s3: and discharging the dried sludge from the discharge barrel, mixing the dried sludge with the fire coal, and burning and heating the boiler by using the mixture as fuel.
The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and so on.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are merely intended to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A belt type sludge low-temperature drying device based on waste heat coupling utilization is characterized by comprising a shell (1); a spiral feeder (12) is arranged on one side of the top end of the shell (1), and a feeding cylinder (11) is arranged on the spiral feeder (12); a heat inlet cylinder (13) and a discharge cylinder (14) are arranged on the side wall of the shell (1) close to the spiral feeder (12), and the heat inlet cylinder (13) is positioned on the upper side of the discharge cylinder (14); a transmission mechanism is arranged in the shell (1); a tail gas treatment box (2) is arranged on the side wall of the shell (1) far away from the spiral feeder (12); an air inlet (21) is formed in the side wall of one side in the tail gas treatment box (2), the air inlet (21) is communicated with the interior of the shell (1), and an air outlet (22) is formed in the side wall of the other side; the side wall of the tail gas treatment box (2) close to the gas outlet (22) is provided with activated carbon (23), and a filter screen (24) is arranged in the box; a first rotating shaft (3) is rotationally connected in the tail gas treatment box (2); a group of fan blades (31) is fixedly connected to the first rotating shaft (3); the position of the air inlet (21) is arranged at a position far away from the central line of the tail gas treatment box (2); the inner side walls of the top end and the bottom end of the tail gas treatment box (2) are respectively provided with a first groove (33); the top end and the bottom end of the filter screen (24) are fixedly connected with connecting plates (32), and the filter screen (24) is fixedly connected to the side wall of the first groove (33) through a spring; a group of concave-convex arc-shaped grooves are formed in the bottoms of the first grooves (33), and the arc-shaped grooves of the pair of first grooves (33) are staggered; the connecting plate (32) is connected to the bottom of the first groove (33) in a sliding manner; the fan blades (31) are contacted with the filter screen (24) when rotating; the end part of the fan blade (31) far away from the first rotating shaft (3) is a trapezoidal end; a second groove (4) is formed in the end part of the trapezoidal end of the fan blade (31); a pressing block (41) is connected in the second groove (4) in a sealing and sliding manner; the end part of the pressing block (41) far away from the bottom of the second groove (4) is rotatably connected with a roller; a group of first cavities (42) are formed in the side walls of the two sides of the trapezoidal end of the fan blade (31); the first cavities (42) are sequentially increased in the direction away from the central line of the fan blade (31); a second push plate (51) is connected in the first cavity (42) in a sealing and sliding manner; the side wall of the second push plate (51) far away from the top end of the fan blade (31) is fixedly connected to the side wall of the first cavity (42) through a spring, and the other side wall of the second push plate (51) is fixedly connected with a top rod (44); the ejector rod (44) penetrates through the first cavity (42) and extends out of the fan blade (31); the rodless cavity of the first cavity (42) and the sealing cavity of the second groove (4) are communicated with each other; a third groove (5) is formed in the end part, far away from the first push plate (43), of the ejector rod (44); a second push plate (51) is fixedly connected to the bottom of the third groove (5) through a spring, and the second push plate (51) is connected to the inner wall of the third groove (5) in a sealing and sliding manner; a push ball (52) is fixedly connected to the second push plate (51); an elastic curved membrane (53) is fixedly connected to the side wall of the third groove (5) close to the opening, and the elastic curved membrane (53) faces the outside of the opening of the third groove (5); a group of cleaning brushes (54) is fixedly connected to the elastic curved membrane (53); the sealing cavity of the third groove (5) and the rod cavity of the first cavity (42) are communicated with each other.
2. The belt type sludge low-temperature drying device based on waste heat coupling utilization as claimed in claim 1, wherein a scraping member is arranged between the top rods (44); the scraping piece comprises a scraping plate (61) and a telescopic rod (6); a scraping plate (61) is hinged between the top rods (44) through a telescopic rod (6); one end of the telescopic rod (6) is hinged on the scraper (61), the other end of the telescopic rod is hinged on the ejector rod (44), and the hinged point is provided with a torsion spring.
3. The belt type sludge low-temperature drying device based on waste heat coupling utilization of claim 2, wherein a sealing cavity is arranged in the telescopic rod (6); a fourth groove (62) is formed in the scraper (61); an elastic bag (63) is arranged in the fourth groove (62); the elastic bag (63) is communicated with the sealing cavity in the telescopic rod (6).
4. The belt type sludge low-temperature drying device based on waste heat coupling utilization according to claim 3, wherein a group of vibration balls (64) are fixedly connected to the elastic bag (63).
5. A drying method of a belt type sludge low-temperature drying device based on waste heat coupling utilization is suitable for the belt type sludge low-temperature drying device based on waste heat coupling utilization in any one of claims 1 to 4, and is characterized in that: the method comprises the following steps:
s1: putting the sludge raw material subjected to preliminary dehydration into a feeding cylinder, performing rotary feeding by a spiral feeder, crushing the sludge, and simultaneously connecting a heat feeding cylinder and a boiler chimney mutually, wherein boiler flue gas carries a large amount of heat to enter a sludge drying machine;
s2: broken sludge entering the shell falls on a conveying belt of the conveying mechanism, heat of boiler flue gas enters a sludge drying machine to dry sludge flatly laid on the conveying belt, and generated tail gas is input into a waste heat utilization system after being treated by a tail gas treatment box
S3: and discharging the dried sludge from the discharge barrel, mixing the dried sludge with the fire coal, and burning and heating the boiler by using the mixture as fuel.
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