CN112794615B - Sludge crushing and drying device - Google Patents

Abstract

The invention discloses a sludge crushing and drying device which comprises a machine base, wherein a drying rotary drum is transversely arranged on the machine base, an inner rotary shaft is arranged in the drying rotary drum, a stirring and pushing rod assembly is radially arranged on the inner rotary shaft, the stirring and pushing rod assembly comprises a pushing section and a fine crushing section along the extension direction of the inner rotary shaft, one end of the drying rotary drum, which is close to the pushing section, is provided with a material inlet, a hot smoke inlet is arranged above the material inlet, and the tail end of the stirring and pushing rod in the fine crushing section is provided with a fine crushing rotary wheel. The stirring push rod that will set up along mummification rotary drum length direction divide into propulsion section and smart garrulous section two parts, refines and divides the worker, and the smart garrulous runner through smart garrulous section tail end will be in the mud in glued stage and carry out abundant breakage, effectively promotes the treatment effect of mud broken mummification device, promotes mummification efficiency, extension equipment life.

Description

Sludge crushing and drying device

Technical Field

The invention relates to the technical field of sludge treatment, in particular to a sludge crushing and drying device.

Background

With the large-scale construction of modern sewage treatment plants, the sludge yield is rapidly increasing. The water content of the sludge is high (generally 98%), the water content is still more than 80% after dehydration, and the sludge is not easy to treat, and if the sludge is not properly treated and disposed, secondary pollution to the surrounding environment of a stacking area is caused. The rational treatment of sludge is a necessary requirement for maintaining the beautiful environment around us and protecting the health of us. Anaerobic digestion, high-temperature composting, incineration and landfill are the most common methods for sludge treatment and disposal, but the sludge with high water content is directly used for composting and landfill and is easy to cause new environmental pollution, and the sludge incineration treatment needs to be firstly dehydrated and dried or added with combustion auxiliary materials. Therefore, various sludge treatment methods generally require drying sludge in advance to reduce the water content of the sludge.

The traditional process for reducing the water content of the sludge is to carry out drying treatment on the sludge by adopting drying equipment at the high temperature of 200-700 ℃, and primary energy sources such as coal, oil, natural gas and the like are required to be consumed; in the drying process of the sludge, along with the reduction of the water content of the sludge, when the water content is reduced to about 60 percent, the sludge is in a cementation stage, and is easy to agglomerate, so that particles which are hard in surface, difficult to crush and still have thin mud inside are formed, and the water is difficult to remove; meanwhile, the sludge in the cementation stage is easy to adhere to the equipment, so that the drying efficiency is reduced, and the service life of the equipment is shortened; the problem of caking is a problem which has to be considered in the sludge drying process.

For example, a sludge crushing type drying device disclosed in chinese patent document, whose publication number is "CN105084707B", includes a horizontal drying main cylinder, a frame for positioning the drying main cylinder, and a rotor spindle, one end of the drying main cylinder is provided with a feeding end, the other end is provided with a discharging end, the drying main cylinder can rotate relative to the feeding end and the discharging end, the top of the feeding end is provided with a hot flue gas inlet, the top of the discharging end is provided with a wet flue gas outlet, the rotor spindle is located inside the drying main cylinder, the frame is provided with a bearing seat for positioning the rotor spindle, the frame is provided with a spindle driving motor capable of driving the rotor spindle to rotate and a main cylinder driving motor capable of driving the drying main cylinder to rotate, the rotor spindle and the drying main cylinder rotate in opposite directions, and the rotor spindle is provided with a plurality of stirring push rods. The device carries out sludge crushing through rotor main shaft cooperation mummification main drum, but this kind of device is to the mummification inefficiency of the ubiquitous mud mummification in-process, easily appear the mud caking problem, still can not obtain better treatment.

Disclosure of Invention

Aiming at the problem that in the prior art, when the water content is reduced to about 60 percent in the sludge crushing process, the sludge is in a cementation stage and is easy to agglomerate, the invention provides the sludge crushing and drying device.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a sludge crushing mummification device, includes the frame, the mummification rotary drum is violently put on the frame, be provided with interior pivot in the mummification rotary drum, radially be provided with stirring push rod subassembly in the interior pivot, stirring push rod subassembly is including propulsion section and refined crushing section along adversion axle extending direction, the one end that the mummification rotary drum is close to propulsion section is provided with the material import, material import top is provided with the hot smoke air inlet, stirring push rod tail end in the refined crushing section is provided with the refined crushing runner. The sludge crushing and drying device disclosed by the invention is a direct drying mode by burning high-temperature hot flue gas, does not need conversion of a heat exchanger waste heat boiler, saves equipment investment and reduces engineering technical standards. The heat source for drying is exhaust hot air which enters along the air inlet in a large amount and is recycled, the oxygen content is low, the dried materials are not easy to oxidize, and the quality of finished products is good. After the sludge enters the drying rotary drum from the material inlet, the sludge is broken into boiling particles in the high-speed rotation of the propelling section, the specific surface area is rapidly changed, the sludge is rapidly propelled to move backwards, and the large amount of wet materials are prevented from being accumulated at the front end of the drying rotary drum; and as the drying drum is deeply driven, the water content of the sludge is reduced to 50-60%, the volume is reduced, and a sticky adhesive state begins to be formed. The retention time needs to be prolonged at the middle and rear sections of the drying rotary drum, and the stirring propelling rod and the fine crushing rotary drum in the fine crushing section are used for finely crushing the sludge to be agglomerated, so that the generation of particles which are hard in surface, difficult to crush and still in the fine crushing rotary drum is effectively avoided. Under the interaction of the stirring push rod assembly and the drying rotary drum, the dried sludge has regular particle size and is convenient for subsequent treatment.

Preferably, a rotating wheel accelerating part is arranged on the inner wall of the drying rotary drum and comprises a plurality of stop rods which are arranged along the radial direction of the drying rotary drum, the stop rods and the stirring and propelling rod are arranged in a parallel staggered mode, the fine crushing rotary wheel comprises a plurality of crushing columns, and the stop rods can impact the crushing columns. The runner acceleration portion sets up on the mummification rotary drum inner wall, including the directional rotation in-process of pivot, because pin and the parallel dislocation of stirring push rod, when the refined crushing rotary drum rotates to pin department, broken post is mutually perpendicular with the pin, when the refined crushing rotary drum passes through the pin, the broken post of pin striking for the refined crushing rotary drum rotational speed improves, and because runner acceleration portion includes a plurality of pins that set up along mummification rotary drum inner wall circumference, consequently the refined crushing rotary drum is every through a pin, and the homoenergetic produces the striking once, makes the speed of refined crushing rotary drum improve, and the broken post of refined crushing rotary drum, especially the broken post of keeping away from pin one side then can be difficult to smash to being in the surperficial hard, but inside still carries out effective striking for the mud granule of rare mud, this makes the mud that is about to agglomerate can be smashed the processing.

Preferably, a crushing rod parallel to the inner rotating shaft is arranged on the stirring and pushing rod in the pushing section, and a crushing chain is arranged on the inner wall of the drying drum corresponding to the pushing section. The chain plays a role in preventing sludge from adhering to the inner wall of the drying drum; simultaneously, can effectively promote the striking area of mud, make mud and chain continuously collide at the continuous rotation in-process of inner rotating shaft, the chain can be changed by the dismouting, thickness size is confirmed according to the nature of mud material.

Preferably, the drying drum is provided with a lifting plate on the inner wall corresponding to the fine crushing section, the lifting plate is arranged along the radial direction of the drying drum, and the lifting plate is arc-shaped. The lifting plate can lift the materials from the bottom of the drying drum to a high position for sliding and throwing, so that the sludge materials are conveniently crushed and dried; the lifting plate can be adjusted in angle, disassembled and replaced.

Preferably, a material outlet is formed in one end, away from the material inlet, of the drying rotary drum, a wind shield is arranged on the inner side of the material outlet, and the wind shield is sleeved on the inner rotary shaft. The wind shield can be disassembled and replaced; the wind shield is arranged to mainly play two roles: one is with hot-blast seal in the rotary drum, under the effect of lifting plate, chain, stirring push rod, crushing stick, forms turbulent air current and makes the abundant mummification material that is used for of heat, and it is second reaches the selection by winnowing purpose of mummification material through changing flue gas exhaust's velocity of flow and direction for mummification product moisture content and particle diameter are more even, and the quality is better.

Further, be provided with on the inner wall that the mummification rotary drum is close to material export one end and keep off the material ring, be provided with ejection of compact baffle on keeping off the material ring, the ejection of compact baffle is the bent plate, the crooked to interior pivot axis direction of ejection of compact board. The material blocking ring is used for increasing the thickness of a sludge material layer and prolonging the retention time of the sludge material in the drying process; the discharge guide plate arranged on the annular circumference of the material baffle plate can enable materials reaching the drying requirement to pass through and discharge, the materials enter the rear section of the outer rotor, and the materials which do not pass through the discharge guide plate can continue to be left in the middle section of the drying rotary drum to continue to be rolled and dried.

Further, be provided with the mummification material mouth on the frame, the mummification material mouth sets up in the material export outside, mummification material mouth top is provided with the cold cigarette gas outlet. Hot flue gas enters the interior of the rotary drum from a heat inlet at the front end of the drying rotary drum along an air inlet, the temperature is 600-700 ℃, high-temperature air enters the drying rotary drum and contacts with vaporous high-humidity sludge, the sludge material is dried quickly, the drying effect is effectively improved, and the tail gas treatment capacity is reduced; with the evaporation of water in the sludge, the hot smoke is gradually changed into cold smoke at the temperature of 150 to 200 ℃ and is discharged from a cold smoke outlet. And the sludge particles dried by the high-temperature air are discharged from the drying material port to the sludge crushing and drying device after being screened by the discharging guide plate.

Preferably, one end of the drying rotary drum, which is close to the material inlet, is provided with a hot air guide plate, and the hot air guide plate is provided with an air guide hole. The air guide holes are regularly distributed along the radial direction of the circular surface of the hot air guide plate; the hot air guide plate can be disassembled and replaced. The arrangement ensures that the hot air is dispersed more scientifically and reasonably, and the heat is transferred to the sludge material more efficiently and quickly, so that the drying efficiency is improved; and the gas after the sludge is mixed by the hot air can be rapidly cooled and quenched in a very short time, so that the condition of generating dioxin again is avoided. Under the action of hot air, the sludge moves forward in a Brownian motion mode in the drying rotary drum, fine particles can be bonded with particles with high humidity to reach certain dryness and then are separated again, the uniform drying effect is achieved, and the fine particles slowly move to a material outlet when reaching certain dryness. And finally, the dried material is discharged from a dried material port at the bottom of the drying device, so that the effect of uniform drying is achieved.

Preferably, the stirring and propelling rod sequentially comprises a connecting part, a crushing part and an extending part along the length direction, the connecting part is connected with the inner rotating shaft, the cross section of the crushing part is semicircular, and the fine crushing rotating wheel is arranged at the tail end of the extending part. The section of the middle section of the stirring and propelling rod is semicircular, and the semicircular surface faces the direction of the material and the direction of the flue gas outlet, so that the arrangement ensures that the material moves towards the outlet direction as far as possible, and the probability of splashing of the material towards the inlet direction is reduced. The section of the rear section of the stirring and propelling rod is circular and is directly connected with the main shaft, and the stirring and propelling rod and the crushing rod can be disassembled, assembled and replaced. The extension part of the front section of the stirring and propelling rod is a transition joint section of the fine crushing rotating wheel and the stirring and propelling rod, and is used for ensuring that the stirring area of the stirring and propelling rod component covers the inner cavity of the drying rotary drum as much as possible, enabling the speed increasing part of the rotating wheel to be in effective contact with the fine crushing rotating wheel, ensuring that the fine crushing rotating wheel rotates at a high speed in the sludge material and crushes sludge particles, and improving the crushing and drying effects.

Preferably, a sealing structure is arranged at the joint of the drying drum and the machine base. The sealing structure ensures the joint effect of the hot flue gas inlet and the drying rotary drum, improves the sealing effect of the drying rotary drum and prevents gas leakage when the device operates.

Therefore, the invention has the following beneficial effects: (1) The stirring and pushing rod arranged along the length direction of the drying drum is divided into a pushing section and a fine crushing section, the refining and the division are carried out, the sludge in the cementation stage is fully crushed through the fine crushing rotating wheel at the tail end of the fine crushing section, the treatment effect of the sludge crushing and drying device is effectively improved, the drying efficiency is improved, and the service life of the device is prolonged; (2) Under the action of the rotating wheel speed increasing part, the crushing column of the rotating wheel can be finely crushed, particularly the crushing column on the side far away from the stop lever can effectively impact sludge particles which are hard on the surface and difficult to crush but still have slime inside, so that the sludge to be agglomerated can be crushed; (3) The chain plays a role in preventing sludge from adhering to the inner wall of the drying drum; meanwhile, the impact area of the sludge can be effectively increased, the sludge is continuously collided with the chain in the continuous rotation process of the inner rotating shaft, the chain can be disassembled and replaced, and the thickness of the chain is determined according to the property of the sludge material; (4) The cross section of the middle section of the stirring and propelling rod is semicircular, and the semicircular section faces the direction of the material and the direction of the smoke outlet, so that the material is ensured to move towards the outlet direction as much as possible, and the probability of splashing of the material towards the inlet direction is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a right side view of the present invention.

Fig. 3 is a left side view of the present invention.

Fig. 4 is a schematic structural view of the stirring push rod in fig. 1.

Fig. 5 is a schematic structural view of the fine crushing rotor of fig. 4.

FIG. 6 is a schematic view showing the structure of a fining wheel in embodiment 2.

In the figure: 100-machine base, 200-stirring pushing rod, 201-connecting part, 202-crushing part, 203-extending part, 101-material inlet, 102-material outlet, 103-hot smoke inlet, 104-cold smoke outlet, 1-drying drum, 2-inner rotating shaft, 3-pushing section, 31-crushing rod, 32-crushing chain, 33-chain fixing plate, 4-fine crushing section, 5-fine crushing rotating wheel, 51-crushing column, 6-rotating wheel speed-raising part, 61-blocking rod, 7-lifting plate, 8-wind shield, 9-material blocking ring, 91-discharging guide plate, 10-drying material port, 11-hot air guide plate, 111-wind guide hole and 12-sealing structure.

Detailed Description

The invention is further described with reference to the following figures and embodiments. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "width", "thickness", "upper", "lower", "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 for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

As shown in fig. 1 and 2, a sludge crushing and drying device comprises a base 100, a drying drum 1 is transversely arranged on the base, an inner rotating shaft 2 is arranged in the drying drum, a stirring and pushing rod assembly 200 is radially arranged on the inner rotating shaft, the stirring and pushing rod assembly comprises a pushing section 3 and a fine crushing section 4 along the extension direction of the inner rotating shaft, a material inlet 101 is arranged at one end of the drying drum close to the pushing section, a hot smoke inlet 103 is arranged above the material inlet, and a fine crushing rotating wheel is arranged at the tail end of the stirring and pushing rod in the fine crushing section. The stirring and propelling rod sequentially comprises a connecting part 201, a crushing part 202 and an extending part 203 along the length direction, the connecting part is connected with the inner rotating shaft, the cross section of the crushing part is semicircular, and the fine crushing rotating wheel is arranged at the tail end of the extending part. The sludge crushing and drying device disclosed by the invention is a direct drying mode by burning high-temperature hot flue gas, does not need conversion of a heat exchanger waste heat boiler, saves equipment investment and reduces engineering technical standards. The heat source for drying is exhaust hot air which enters along the air inlet in a large amount and is recycled, the oxygen content is low, the dried materials are not easy to oxidize, and the quality of finished products is good. After the sludge enters the drying rotary drum from the material inlet, the sludge is broken into boiling particles in the high-speed rotation of the propelling section, the specific surface area is rapidly changed, the sludge is rapidly propelled to move backwards, and the large amount of wet materials are prevented from being accumulated at the front end of the drying rotary drum; and as the drying drum is deeply driven, the water content of the sludge is reduced to 50-60%, the volume is reduced, and a sticky adhesive state begins to be formed. The retention time needs to be prolonged at the middle and rear sections of the drying rotary drum, and the stirring propelling rod and the fine crushing rotary drum in the fine crushing section are used for finely crushing the sludge to be agglomerated, so that the generation of particles which are hard on the surface, difficult to crush and still in the fine crushing rotary drum is effectively avoided. Under the interaction of the stirring push rod assembly and the drying rotary drum, the dried sludge has regular particle size and is convenient for subsequent treatment. As shown in figures 4 and 5, the section of the middle section of the stirring and propelling rod is semicircular, and the semicircular section faces the direction of the material and the smoke outlet, so that the arrangement ensures that the material moves towards the outlet direction as much as possible, and the probability of splashing of the material towards the inlet direction is reduced. The section of the rear section of the stirring and propelling rod is circular and is directly connected with the main shaft, and the stirring and propelling rod and the crushing rod can be disassembled, assembled and replaced. The extension part of the front section of the stirring and propelling rod is a transition joint section of the fine crushing rotating wheel and the stirring and propelling rod, and is used for ensuring that the stirring area of the stirring and propelling rod component covers the inner cavity of the drying rotary drum as much as possible, enabling the speed increasing part of the rotating wheel to be in effective contact with the fine crushing rotating wheel, ensuring that the fine crushing rotating wheel rotates at a high speed in the sludge material and crushes sludge particles, and improving the crushing and drying effects.

Be provided with runner acceleration portion on the inner wall of mummification rotary drum, runner acceleration portion includes a plurality of pin along the radial setting of mummification rotary drum, and the pin sets up with the parallel dislocation of stirring push rod, and the refining rotating wheel includes a plurality of broken posts, but the pin striking broken post. Runner acceleration portion sets up on mummification rotary drum inner wall, including the directional rotation in-process of pivot, because pin and the parallel dislocation of stirring push rod, when the refined crushing rotary drum rotates to pin department, broken post is mutually perpendicular with the pin, when the refined crushing rotary drum passes through the pin, the broken post of pin striking, make the refined crushing rotary drum rotational speed improve, and because runner acceleration portion includes a plurality of pins that set up along mummification rotary drum inner wall circumference, consequently the refined crushing rotary drum is every through a pin, all can produce once striking, make the speed of refined crushing rotary drum improve, and the broken post of refined crushing rotary drum, especially the broken post of keeping away from pin one side then can be to being in the surperficial hard smashing of being difficult to, but inside still carries out effective striking for the mud granule of rare mud, this makes the mud that is about to agglomerate can be smashed the processing.

As shown in fig. 2, a crushing rod 31 parallel to the inner rotating shaft is arranged on the stirring and propelling rod in the propelling section, and a crushing chain 32 is arranged on the inner wall of the drying drum corresponding to the propelling section. The end of the drying rotary drum, which is far away from the material inlet, is provided with a material outlet 102, the inner side of the material outlet is provided with a wind shield, and the wind shield is sleeved on the inner rotating shaft. The inner wall of the drying rotary drum, which is close to one end of the material outlet, is provided with a material blocking ring, the material blocking ring is provided with a discharging guide plate, the discharging guide plate is a bent plate, and the discharging plate is bent towards the axis direction of the inner rotating shaft. The chain plays a role in preventing sludge from adhering to the inner wall of the drying drum; simultaneously, can effectively promote the striking area of mud, make mud and chain continuously collide including the continuous rotation in-process of pivot, the chain can be changed by the dismouting, thickness size is confirmed according to the nature of mud material. The inner wall of the drying rotary drum corresponding to the fine crushing section is provided with a lifting plate, the lifting plate is arranged along the radial direction of the drying rotary drum, and the lifting plate is arc-shaped. The lifting plate can lift the materials from the bottom of the drying drum to a high position for sliding and throwing, so that the sludge materials are conveniently crushed and dried; the lifting plate can be adjusted in angle, disassembled and replaced. The wind shield can be disassembled and replaced; the wind shield is arranged to mainly play two roles: one is with hot-blast seal in the rotary drum, under the effect of lifting plate, chain, stirring push rod, crushing stick, forms turbulent air current and makes the abundant mummification material that is used for of heat, and it is second reaches the selection by winnowing purpose of mummification material through changing flue gas exhaust's velocity of flow and direction for mummification product moisture content and particle diameter are more even, and the quality is better. The material blocking ring is used for increasing the thickness of a sludge material layer and prolonging the retention time of the sludge material in the drying process; the discharge guide plate arranged on the annular circumference of the material baffle plate can enable materials reaching the drying requirement to pass through and discharge, the materials enter the rear section of the outer rotor, and the materials which do not pass through the discharge guide plate can continue to be left in the middle section of the drying rotary drum to continue to be rolled and dried.

As shown in fig. 3, a drying material port 10 is arranged on the machine base, the drying material port is arranged at the outer side of the material outlet, and a cold smoke outlet 104 is arranged above the drying material port. Hot flue gas enters the interior of the rotary drum from the heat at the front end of the drying rotary drum along the air inlet, the temperature is 600-700 ℃, high-temperature air enters the drying rotary drum and contacts with the vaporous high-humidity sludge, the sludge material is dried quickly, the drying effect is effectively improved, and the tail gas treatment capacity is reduced; with the evaporation of water in the sludge, the hot flue gas is gradually changed into cold flue gas at the temperature of 150 to 200 ℃ and is discharged from a cold flue gas outlet. And the sludge particles dried by the high-temperature air are discharged from the drying material port to the sludge crushing and drying device after being screened by the discharge guide plate. One end of the drying rotary drum close to the material inlet is provided with a hot air guide plate, and the hot air guide plate is provided with an air guide hole. The air guide holes are regularly distributed along the radial direction of the circular surface of the hot air guide plate; the hot air guide plate can be disassembled and replaced. The arrangement ensures that the hot air is dispersed more scientifically and reasonably, and the heat is transferred to the sludge material more efficiently and quickly, so that the drying efficiency is improved; and the gas after the sludge is mixed by the hot air can be rapidly cooled and quenched in a very short time, so that the condition of generating dioxin again is avoided. Under the action of hot air, sludge advances in a Brownian motion mode in the drying rotary drum, fine particles can be bonded with particles with high humidity to reach a certain dryness and then are separated again, the uniform drying effect is achieved, and the fine particles slowly move to a material outlet when reaching the certain dryness. And finally, the dried material is discharged from a dried material port at the bottom of the drying device, so that the effect of uniform drying is achieved. The joint of the drying drum and the machine base is provided with a sealing structure. The sealing structure ensures the joint effect of the hot flue gas inlet and the drying rotary drum, improves the sealing effect of the drying rotary drum and prevents gas leakage when the device operates.

In this embodiment, wet sludge material is lifted from the bottom to the top of the drying drum by the lifting plate disposed in the drying drum while entering the drying drum through the material inlet. When falling from the upper surface, the sludge is rapidly crushed and pushed by the crushing rod and the stirring push rod which rotate at high speed, and the sludge is repeatedly stirred and fully contacted with high-temperature hot air to evaporate and dry the water. In the propelling section, the large materials are crushed into small blocks with wet surfaces, the small blocks are contacted with hot air, and the small blocks are rapidly propelled to the middle section of the drying rotary drum to reach the fine crushing section through the stirring propelling rod. The small material is crushed into particles by the stirring and propelling rod of the fine crushing section and the fine crushing rotating wheel at the tail end of the stirring and propelling rod, and the fine crushing rotating wheel carries out continuous variable speed motion under the action of the rotating wheel accelerating part on the inner wall of the drying rotary drum, so that the small material collides with the sludge block thrown down by the sliding of the lifting plate at the top end in the drum in the one-time impact accelerating process of the stop rod. In this embodiment, the drying drum is externally provided with an external rotation motor, the drying drum rotates in a reciprocating manner under the driving of the external rotation motor, the internal rotation shaft is connected with an internal rotation motor, and the internal rotation motor drives the internal rotation shaft and the stirring push rod assembly thereon to continuously rotate at a high speed in one direction. Mud material is from propulsion section entering fine crushing section, keeps off the material ring with nearly unified granularity arrival under the continuous effect of fine crushing section, keeps off the ejection of compact baffle on the material ring and is the annular plate of inside pivot direction bending, and the ejection of compact baffle blocks the mud that the granularity is not conform to the requirement of presetting, makes its reentrant fine crushing section's processing procedure, and accords with the mud of presetting the requirement and discharges from the material export.

Example 2

Different from the embodiment 1, in the embodiment, the lengths of the crushing rods on the fine crushing rotating wheels on the two sides of the extending part are unequal, and the crushing rods comprise the long ends and the short ends, so that the fine crushing rotating wheels can rotate at variable speeds under the unbalanced structure no matter the long ends or the short ends collide with the stop rods, the fine crushing rotating wheels can effectively assist high-temperature hot air in the drying drum to form turbulent flow, and the drying effect is improved. Meanwhile, as the contact area between the long end and the sludge material is larger, after the short end collides with the stop lever, the free end of the long end has higher linear speed than the crushing lever in the embodiment 1 because the long end and the short end have the same angular speed, and the momentum of the long rod is obviously improved according to the momentum formula, so that the sludge particles can be more effectively impacted for crushing. Correspondingly, after the long end collides with the stop lever, the distance from the collision point to the central axis of the fine crushing runner is smaller than the distance from the collision point to the free end of the long end, so that the mass of the long end is higher than that of the crushing rod in embodiment 1, higher momentum is obtained, and the crushing effect is effectively improved.

In addition to the above embodiments, the technical features of the present invention can be re-selected and combined to form new embodiments within the scope of the claims and the specification of the present invention, which are all realized by those skilled in the art without creative efforts, and thus, the embodiments of the present invention which are not described in detail should be regarded as the specific embodiments of the present invention and are within the protection scope of the present invention.

Claims (9)

1. A sludge crushing and drying device is characterized by comprising a machine base, wherein a drying rotary drum is transversely arranged on the machine base, an inner rotary shaft is arranged in the drying rotary drum, a plurality of stirring and pushing rods are radially arranged on the inner rotary shaft, each stirring and pushing rod comprises a pushing section and a fine crushing section along the extension direction of the inner rotary shaft, one end of the drying rotary drum, which is close to the pushing section, is provided with a material inlet, a hot smoke inlet is arranged above the material inlet, and the tail end of each stirring and pushing rod in the fine crushing section is provided with a fine crushing rotary wheel;

a rotating wheel accelerating part is arranged on the inner wall of the drying rotary drum and comprises a plurality of stop rods arranged along the radial direction of the drying rotary drum, the stop rods and the stirring and propelling rod are arranged in a parallel and staggered manner, the fine crushing rotary wheel comprises a plurality of crushing columns, and the stop rods can impact the crushing columns; in the directional rotation process of the inner rotating shaft, because the stop lever and the stirring and propelling rod are in parallel dislocation, when the fine crushing rotating wheel rotates to the stop lever, the stop lever impacts the crushing column, so that the rotating speed of the fine crushing rotating wheel is increased;

the stirring and propelling rod sequentially comprises a connecting part, a crushing part and an extending part along the length direction; the length of the crushing rod on the fine crushing rotating wheel on two sides of the extending part is unequal, and the crushing rod comprises a long end and a short end, so that the fine crushing rotating wheel can rotate in a variable speed after the long end or the short end collides with the stop lever, and the fine crushing rotating wheel can effectively assist high-temperature hot air in the drying rotary drum to form turbulent flow.

2. The sludge crushing and drying device as claimed in claim 1, wherein the stirring and propelling rod in the propelling section is provided with a crushing rod parallel to the inner rotating shaft, and the drying drum is provided with a crushing chain on the inner wall corresponding to the propelling section.

3. The sludge crushing and drying device as claimed in claim 1, wherein a lifting plate is arranged on the inner wall of the drying drum corresponding to the fine crushing section, the lifting plate is arranged along the radial direction of the drying drum, and the lifting plate is arc-shaped.

4. The sludge crushing and drying device as claimed in claim 1, wherein a material outlet is arranged at one end of the drying drum away from the material inlet, a wind shield is arranged at the inner side of the material outlet, and the wind shield is sleeved on the inner rotating shaft.

5. The sludge crushing and drying device as claimed in claim 4, wherein a material blocking ring is arranged on the inner wall of one end of the drying drum close to the material outlet, a discharging guide plate is arranged on the material blocking ring, the discharging guide plate is a bent plate, and the discharging plate is bent towards the axis direction of the inner rotating shaft.

6. The sludge crushing and drying device according to claim 4, wherein a drying material port is arranged on the machine base, the drying material port is arranged on the outer side of the material outlet, and a cold smoke outlet is arranged above the drying material port.

7. The sludge crushing and drying device as claimed in claim 1, wherein a hot air guide plate is arranged at one end of the drying drum close to the material inlet, and an air guide hole is arranged on the hot air guide plate.

8. The sludge crushing and drying device as claimed in any one of claims 1 to 7, wherein the stirring and propelling rod comprises a connecting part, a crushing part and an extending part in sequence along the length direction, the connecting part is connected with the inner rotating shaft, the cross section of the crushing part is semicircular, and the fine crushing rotating wheel is arranged at the tail end of the extending part.

9. The sludge crushing and drying device as claimed in claim 1, wherein a sealing structure is arranged at the joint of the drying drum and the machine base.

Images