CN112551927B

CN112551927B - Electromagnetic sludge roasting treatment system and process for preparing lightweight aggregate

Info

Publication number: CN112551927B
Application number: CN202011422692.0A
Authority: CN
Inventors: 欧钱江; 夏禹竑
Original assignee: Shanghai Environmental Protection Co ltd
Current assignee: Shanghai Environmental Protection Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2022-02-01
Anticipated expiration: 2040-12-08
Also published as: CN112551927A

Abstract

The invention discloses a sludge electromagnetic roasting treatment system and a process for preparing lightweight aggregate, and belongs to the technical field of sludge treatment. The kiln comprises a kiln body, a power generation box, a drying device and a ball making device, wherein a smoke waste heat recovery box is arranged at the tail part of the kiln body, high-temperature gas in the kiln body is guided in by utilizing an internal flue cavity, heat exchange is carried out through an internal side cavity to heat water in a water cavity to steam, a steam impeller is pushed to rotate through a heat conduction pipe to generate electricity and supply power to the kiln body, the heat loss is reduced, the waste heat recovery box and the kiln body work independently, the motion state of the kiln body is prevented from influencing the waste heat recovery box, the smoke subjected to heat exchange is cooled, the sludge is dried in a drying box, the production cost and the occupied space of the drying process are reduced, the dried sludge is crushed by the ball making device and then enters the kiln body to efficiently roast to obtain lightweight aggregate, the process greatly reduces the energy consumption, saves the cost, reduces the investment and reduces the occupied area, The process is simple.

Description

Electromagnetic sludge roasting treatment system and process for preparing lightweight aggregate

Technical Field

The invention relates to the technical field of sludge treatment, in particular to a sludge electromagnetic roasting treatment system and a process for preparing lightweight aggregate.

Background

The sludge has high water content and low heat value, can not be directly burnt, is easy to generate dioxin in the burning process with household garbage, generates a large amount of percolate in the landfill treatment, and seriously pollutes the environment.

At present, the main treatment mode of sludge in the market is to dry the sludge and send the dried sludge to a power plant for incineration, composting or landfill. The sludge treatment plant mostly adopts drying equipment such as rotary kilns, paddle type, disc type and low-temperature heat pumps in the process of drying the sludge, and adopts a method of directly or indirectly drying by using heat sources such as fuel, electricity, steam and the like, so that the operation cost is extremely high, and the production cost pressure of the treatment plant is increased; in order to reduce part of drying cost, organic components and inorganic components are separated by a physical method of adding water into sludge to dilute, the inorganic components are directly aired after being filter-pressed to be used as building materials, and the organic components are dried by a low-temperature heat pump after being filter-pressed to be sent to compost or incineration.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a sludge electromagnetic roasting treatment system and a process for preparing lightweight aggregate.

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

mud electromagnetism calcination processing system, including the kiln body, power generation box, drying device and system ball device, the outer wall of the kiln body is provided with flue gas waste heat recovery case, flue gas waste heat recovery case set up the afterbody of the kiln body and with the inside intercommunication of the kiln body, the bottom welding of flue gas waste heat recovery case has the supporting seat, the top of flue gas waste heat recovery case is provided with the heat pipe, the right-hand member bottom of heat pipe and the top sealing connection of power generation box, the outer wall sealing connection of heat pipe has the counterflow pipe, flue gas waste heat recovery case and drying device pipeline intercommunication just dry mud through the flue gas of retrieving the waste heat, through mud behind the drying device gets into the inside calcination that smashes of system ball device reentrant kiln body.

Further preferably, flue gas waste heat recovery case includes outside chamber, inboard chamber and flue chamber, the outer wall overlap joint in inboard chamber has the water cavity, the outer wall in water cavity and the inner wall overlap joint in outside chamber, the outer wall of heat pipe runs through in the outside chamber, just the bottom through connection of heat pipe has the water cavity, the flue chamber sets up inboard in the inboard chamber and communicates with the inside of the kiln body.

Further preferably, the inner wall top fixed mounting of heat pipe has the baffler, the refluence hole has been seted up to the inner wall bottom of heat pipe, the outer wall of refluence hole inlays the rigid coupling and is connected with the heat pipe, the inner wall sealing connection in refluence hole has the counterflow pipe.

Further preferably, the top fixed mounting of power generation box has the water storage box, the top sealing connection of water storage box has the filter tube, the left end sealing connection of filter tube has the retaining ring, the inner wall top fixed mounting of power generation box has the turbine blade guard box, the axle center department of turbine blade guard box inlays the rigid connection and is connected with the pivot, the bottom embedding of pivot is connected with the power generation case, the pivot rotates through the turbine blade guard box that sets up and is connected with the power generation case, and the wiring end line connection of power generation case has the battery, the right side of power generation case is provided with electrical socket, the output end circuit and the kiln body coupling of battery.

Further preferably, the water storage ring comprises an outer ring and an inner ring, the heat conduction pipe is arranged between the outer ring and the inner ring, the outer wall of the heat conduction pipe penetrates through the bottom of the outer ring, the outer wall of the heat conduction pipe below the outer ring is hermetically connected with the bottom of the inner ring, and the upper left end of the filter pipe sequentially penetrates through the outer ring and the outer wall of the heat conduction pipe and is overlapped with the bottom of the inner ring.

Further preferably, the bottoms of the generator box and the storage battery are welded to the bottom of the inner wall of the generator box, and the top of the turbine blade protection box is welded to the top of the inner wall of the generator box.

Preferably, the left side of the heat conduction pipe is connected with a water inlet valve in a penetrating manner, the bottom of the kiln body is rotatably connected with an auxiliary support frame, and the bottom of the auxiliary support frame and the bottom of the support seat are positioned on the same horizontal line.

Further preferably, still include the stoving case, be equipped with feed inlet, discharge gate, air inlet and exhaust port on the stoving case, the air inlet passes through pipeline and flue chamber intercommunication, exhaust port department installs flue gas purification device, the stoving incasement portion of extending to stoving incasement portion of installing driving motor and driving motor's output, stoving incasement portion be provided with driving motor's output fixed mounting's churn, a plurality of stirring subassembly is installed to circumference on the churn.

Further preferably, the bottom of the drying box positioned on the inner side of the mixing drum is provided with a baffle plate, the mixing assembly comprises a first mixing sheet set, a connecting assembly and a second mixing sheet set, the first mixing sheet set is arranged between the mixing drum and the inner wall of the drying box, the second mixing sheet set is arranged on the inner side of the mixing drum, the first mixing sheet set and the second mixing sheet set both comprise two oppositely-opened stirring sheets, the stirring sheets of the second mixing sheet set are both matched with the baffle plate, the connecting assembly comprises a connecting shaft, a connecting rod, a guide groove and a compression spring, the connecting shaft is provided with two stirring sheets which are both rotatably arranged on the mixing drum, the connecting shaft is used for connecting the first mixing sheet set and the second mixing sheet set, the connecting rod is arranged on the inner side of the mixing drum, the connecting rod is provided with the guide groove, and the guide groove is internally and symmetrically provided with two sliders and two compression springs, one end of the compression spring is fixedly installed on the inner wall of the guide groove, the other end of the compression spring is fixedly installed on one side of the sliding block, and the sliding block is rotatably installed on the other shifting piece on the first stirring piece group and the second stirring piece group respectively.

The invention also discloses a process for preparing the lightweight aggregate by the sludge electromagnetic roasting treatment system, which comprises the following steps:

the method comprises the following steps: firstly, a certain amount of sludge with the water content of 30 percent is placed in a kiln body to be roasted at 1150-1250 ℃, high-temperature flue gas is generated in the roasting process, the high-temperature flue gas enters a flue cavity and exchanges heat with an inner cavity, heat is transferred to a water cavity through the inner cavity firstly, water in the water cavity reaches a certain temperature to generate steam, the steam moves upwards due to the low density of the steam, the steam flows into the power generation box through the arranged heat conduction pipe to generate power, water drops are generated when the steam meets cold air outside the heat conduction pipe in the flowing process, the steam can collect the water drops when passing through the baffle plate and then falls at the bottom of the heat conduction pipe, at the moment, the height of the heat conduction pipe is uneven, the water drops gradually flow towards the direction of the counter-flow hole, the water drops flow into the water cavity again through the arranged counter-flow pipe, and before the steam enters the power generation box, water drops on the inner part of the heat conduction pipe can flow into the joint between the inner side ring and the heat conduction pipe to enable the water drops to be detained, the detained water drops are drained into the water storage tank through the filter pipe, at the moment, water vapor can enter the interior of the turbine blade protection box, the high-temperature and high-pressure water vapor can be sprayed onto the turbine blade to enable the turbine blade to rotate, and in the rotating process, the rotating shaft is driven, so that a generator in the generator box is driven, the generated electricity is transmitted into the storage battery, the heat is recycled to generate electricity, and the electricity is supplied to the kiln body;

step two: flue gas after heat exchange occurs in the flue cavity enters the drying box, sludge enters through the feed inlet, the sludge is heated in the drying box under the action of driving the stirring cylinder to rotate by the driving motor, and simultaneously stirred under the action of the stirring assembly, so that the water content of the original sludge is reduced to 30% from 80%, when the sludge passes through the bottom of the drying box, the baffle can prevent the stirring sheet group II from rotating, two stirring sheets of the stirring sheet group II are opened, and meanwhile, two stirring sheets of the stirring sheet group I are also driven to be opened, the dried sludge can be accelerated to enter the ball making device for crushing, and a large amount of moisture is taken away after the sludge is dried by the flue gas and can be discharged through the flue gas purification device;

step three: the crushed sludge enters a kiln body to be roasted at the temperature of 1150-1250 ℃ for 55-65min, and the size range of the prepared lightweight aggregate is as follows: 5-30mm, bulk density: 500-1200kg/m3, barrel pressure: 10.0-20.0Mpa, sintering temperature: 1150-1250 ℃/1h, water absorption: less than or equal to 10 percent, the generated flue gas generates electricity through the flue gas waste heat recovery box to supply power to the kiln body, and the flue gas after heat exchange enters the drying box to dry the subsequent sludge.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention comprises a kiln body, a power generation box, a drying device and a ball making device, wherein a smoke waste heat recovery box is arranged at the tail part of the kiln body, high-temperature gas in the kiln body is introduced by utilizing an internal flue cavity, heat exchange is carried out through an internal cavity to heat water in a water cavity to steam, a steam impeller is pushed to rotate through a heat conduction pipe to generate electricity and supply power to the kiln body, the loss of heat is reduced, the waste heat recovery box and the kiln body work independently, the influence of the motion state of the kiln body on the waste heat recovery box is avoided, the smoke subjected to heat exchange is cooled, the smoke enters the drying box to dry sludge, the production cost and the occupied space of the drying process are reduced, the dried sludge enters the kiln body after being crushed through the ball making device and is high-efficiency roasted to obtain light aggregate, the process greatly reduces the energy consumption, saves the cost and reduces the investment, The occupied area is greatly reduced, and the process is simple.

2. According to the invention, the countercurrent pipe and the heat conduction pipe are combined, water drops condensed by water vapor in the heat conduction pipe are subjected to countercurrent, and the countercurrent pipe and the blocking plate are matched with each other, so that a large amount of water drops can be formed to flow into the water cavity through the countercurrent pipe, and water in the water cavity is heated and evaporated by heat emitted by the kiln body, so that the consumption of water in the water cavity can be reduced, and the arrangement of the water cavity avoids a waste heat recovery device arranged in the kiln body, and the service life of the waste heat recovery box is prolonged.

3. According to the invention, water drops generated before water vapor enters the power generation box can be prevented again through the water storage ring, and the water retained at the bottom of the water storage ring is guided into the water storage box by matching with the filter pipe, so that the water drops generated by the water vapor are utilized for multiple times.

4. According to the drying box, the stirring cylinder, the driving motor and the stirring assembly, the driving motor drives the stirring cylinder and the stirring assembly to rotate to drive sludge to stir, flue gas in a flue cavity is subjected to heat exchange in the process to dry sludge, the sludge drying effect is better through stirring and flue gas drying, meanwhile, the drying cost can be reduced, and resources are recycled. The baffle blocks the stirring sheet group II, so that the two shifting sheets of the stirring sheet group II are opened to drive the two shifting sheets of the stirring sheet group I to be opened, the dried sludge can be accelerated to enter the ball making device through the opening of the two shifting sheets, and then the dried sludge enters the kiln body to be roasted to prepare the lightweight aggregate, the whole process can better control the cost and can ensure the preparation of the lightweight aggregate.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a schematic view of the structural connection between the kiln body and the waste heat recovery tank according to the present invention;

FIG. 3 is a sectional view of the construction of the waste heat recovery tank of the present invention;

FIG. 4 is a cross-sectional view of a heat transfer tube configuration of the present invention;

FIG. 5 is a cross-sectional view of a generator box structure of the present invention;

FIG. 6 is a schematic view of a water impoundment ring structure of the present invention;

FIG. 7 is a schematic view of the overall structure of the drying box of the present invention;

fig. 8 is a schematic view of the overall structure of the stirring assembly of the present invention.

In the figure: 1. a kiln body; 2. a power generation box; 3. a heat conducting pipe; 4. a waste heat recovery tank; 41. an outer cavity; 42. an inner cavity; 43. a flue cavity; 5. a supporting seat; 6. a reflux tube; 7. a water chamber; 8. a water storage ring; 81. an outer ring; 82. an inner ring; 9. a filter tube; 10. a water storage tank; 11. a turbine blade protection box; 12. a rotating shaft; 13. a generator box; 14. a storage battery; 15. a power jack; 16. a barrier plate; 17. an upstream orifice; 18. a water inlet valve; 19. a drying box; 20. a smoke outlet; 21. a mixing drum; 22. a stirring sheet group I; 23. a stirring sheet group II; 24. a baffle plate; 25. a connecting shaft; 26. a connecting rod; 27. a guide groove; 28. a compression spring; 29. a slide block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1 to 8, the electromagnetic sludge roasting treatment system comprises a kiln body 10 (an electromagnetic heating rotary kiln with a high front part and a low back part), a power generation box 2, a drying device and a ball making device, wherein a flue gas waste heat recovery box 4 is arranged on the outer wall of the kiln body 1, the flue gas waste heat recovery box 4 is arranged at the tail part of the kiln body 1 and is communicated with the inside of the kiln body 1, a support seat 5 is welded at the bottom of the flue gas waste heat recovery box 4, a heat conduction pipe 3 is arranged at the top of the flue gas waste heat recovery box 4, the bottom of the right end of the heat conduction pipe 3 is hermetically connected with the top of the power generation box 2, a counter-flow pipe 6 is hermetically connected with the outer wall of the heat conduction pipe 3, the flue gas waste heat recovery box 4 is communicated with a drying device pipeline and dries sludge through flue gas for recovering waste heat, the sludge enters the ball making device to be crushed and then enters the kiln body 1 to be roasted, the left side of the heat conduction pipe 3 is connected with a water inlet valve 18 in a penetrating mode, the bottom of the kiln body 1 is rotatably connected with an auxiliary supporting frame, and the bottom of the auxiliary supporting frame and the bottom of the supporting seat 5 are located on the same horizontal line.

In the embodiment, the supporting seat 5 and the auxiliary supporting frame at the bottom of the kiln body 1 are arranged to realize the mutually independent work between the waste heat recovery tank 2 and the kiln body 1, so that the waste heat recovery tank 2 is prevented from being influenced by the working state of the kiln body 1, meanwhile, the bottom of the auxiliary supporting frame is relatively horizontal to the bottom of the supporting seat 5, and whether the joint of the flue gas waste heat recovery tank 4 and the kiln body 1 needs to be attached or not is ensured, so that the heat recovery efficiency is higher, the flue gas waste heat recovery tank 4 generates electricity through the heat conduction pipe 3 and the power generation tank 4 and supplies power to the kiln body 1, the flue gas after waste heat recovery enters the drying device to dry sludge, the dried sludge enters the kiln body 1 to be roasted after being crushed and pelletized in the pelletizing device, the flue gas generated by the reciprocating circulation continuously supplies power to the kiln body 1, the production cost is greatly reduced, meanwhile, the quality of the lightweight aggregate can be ensured.

Further preferred scheme, flue gas waste heat recovery case 4 includes outside chamber 41, inboard chamber 42 and flue chamber 43, the outer wall overlap joint of inside chamber 42 has water cavity 7, the outer wall of water cavity 7 and the inner wall overlap joint of outside chamber 41, the outer wall of heat pipe 3 runs through in outside chamber 41, just the bottom through connection of heat pipe 3 has water cavity 7, and the vapor that the water cavity 7 of being convenient for produced passes through heat pipe 3 and transmits away, flue chamber 43 sets up inside of inside chamber 42 and communicates with the inside of the kiln body 1, the leading-in of the flue gas of being convenient for.

Further preferably, a blocking plate 16 is fixedly mounted at the top of the inner wall of the heat conduction pipe 3, the blocking plate 16 is composed of a plurality of blocking strips, and is convenient for water drops to form while water vapor circulates, a reverse flow hole 17 is formed in the bottom of the inner wall of the heat conduction pipe 3, the heat conduction pipe 3 is fixedly connected with the outer wall of the reverse flow hole 17 in an embedded mode, the reverse flow pipe 6 is connected with the inner wall of the reverse flow hole 17 in a sealing mode, the periphery of the reverse flow hole 17 is slightly lower than the left end and the right end of the heat conduction pipe 3, so that water drops falling off from the blocking plate 16 are collected around the reverse flow hole 17, the water drops fall into the water cavity 7 through the reverse flow pipe 6, a water inlet valve 18 is connected to the left side of the heat conduction pipe 3 in a penetrating mode, and the water inlet valve 18 is convenient for supplying water to the inside of the water cavity 7.

Further preferably, a water storage tank 10 is fixedly installed at the top of the power generation tank 2, a filter pipe 9 is hermetically connected at the top of the water storage tank 10, a water storage ring 8 is hermetically connected at the left end of the filter pipe 9, a turbine blade protection tank 11 is fixedly installed at the top of the inner wall of the power generation tank 2, a rotating shaft 12 is fixedly connected at the axis of the turbine blade protection tank 11 in an embedded manner, a power generation tank 13 is connected at the bottom of the rotating shaft 12 in an embedded manner, the rotating shaft 12 is rotatably connected with the power generation tank 13 through the arranged turbine blade protection tank 11, and a wiring terminal line of the power generation tank 13 is connected with a storage battery 14. when high-temperature and high-pressure steam enters the turbine blade protection tank 11, the steam can be sprayed onto the turbine blades in the turbine blade protection tank 11 to rotate, the rotating shaft 12 is driven to rotate in the rotating process, so as to rotate the driving end of a generator in the power generation tank 13, the electricity that the generator produced is carried in battery 14 and is stored, and the right side of power generation box 2 is provided with electrical socket 15, and the output end line connection of battery 14 has electrical socket 15, and the bottom of generator box 13 and battery 14 and the inner wall bottom welding of power generation box 2, the top of turbine blade guard box 11 and the inner wall top welding of power generation box 2.

Further preferably, the water storage ring 8 includes an outer ring 81 and an inner ring 82, the heat conductive pipes 3 are disposed between the outer ring 81 and the inner ring 82, the outer wall of the heat conduction pipe (3) penetrates the bottom of the outer ring 81, the outer wall of the heat conduction pipe (3) positioned below the outer ring 81 is hermetically connected with the bottom of the inner ring 82, the left upper end of the filter tube 9 penetrates through the outer ring 81 and the outer wall of the heat conducting tube 3 in sequence and is lapped with the bottom of the inner ring 82, the heat conducting tube 3 is arranged between the outer ring 81 and the inner ring 82, the joint of the outer wall of the heat conducting tube 3 and the bottom of the outer ring 81 is in penetrating connection, and has a certain sealing property so that water droplets on the inner wall of the heat conductive pipe 3 fall into the region between the outer ring 81 and the inner ring 82 due to gravity and temporarily stay at the bottom, and are discharged to the inside of the water reservoir 10 through the filter pipe 9 toward the bottom thereof.

Further preferably, the bottoms of the generator box 13 and the storage battery 14 are welded to the bottom of the inner wall of the generator box 2, and the top of the turbine blade protection box 11 is welded to the top of the inner wall of the generator box 2.

Further preferred scheme still includes stoving case 19, be equipped with feed inlet, discharge gate, air inlet and exhaust port 20 on the stoving case 19, the air inlet passes through pipeline and flue chamber 43 intercommunication, exhaust port 20 department installs flue gas purification device, it extends to inside the stoving case 19 to install driving motor and driving motor's output on the stoving case 19, the inside churn 21 that is provided with driving motor's output fixed mounting of stoving case 19, a plurality of stirring subassembly is installed to circumference on the churn 21.

Further preferred scheme, be located the churn 21 inboard the bottom of stoving case 19 installs baffle 24, the stirring subassembly includes stirring piece group one 22, coupling assembling and stirring piece group two 23, stirring piece group one 22 sets up between churn 21 and stoving case 19 inner wall, stirring piece group two 23 sets up the inboard at churn 21, stirring piece group one 22 and stirring piece group two 23 all include two to open plectrums, the plectrum of stirring piece group two 23 all with baffle 24 adaptation, coupling assembling includes connecting axle 25, connecting rod 26, guide way 27 and compression spring 28, connecting axle 25 is equipped with two and all rotates and installs on churn 21, connecting axle 25 is used for connecting a plectrum of stirring piece group one 22, stirring piece group two 23, connecting rod 26 sets up the inboard at churn 21, the guide way 27 has been seted up on connecting rod 26, two sliding blocks 29 and two compression springs 28 are symmetrically arranged in the guide groove 27, one end of each compression spring 28 is fixedly installed on the inner wall of the guide groove 27, the other end of each compression spring 28 is fixedly installed on one side of each sliding block 29, and each sliding block 29 is rotatably installed on the other stirring piece of the first stirring piece group 22 and the other stirring piece group 23 respectively.

Drive churn 21 and the rotatory mud that drives of stirring subassembly through driving motor and turn over and stir, the flue gas of in-process flue chamber 43 inside is dried mud after the heat exchange, dries through stirring and flue gas and makes mud stoving effect better, can also reduce the cost of drying simultaneously, the resource recycle ization. The baffle 24 blocks the stirring sheet group II 23, so that the two stirring sheets of the stirring sheet group II 23 are opened to drive the two stirring sheets of the stirring sheet group I22 to be opened, the dried sludge can be accelerated to enter the ball making device through the opening of the two stirring sheets, and then the dried sludge enters the kiln body 1 to be roasted to prepare the lightweight aggregate, the cost can be better controlled in the whole process, and the preparation of the lightweight aggregate can be ensured.

Example 2:

the process for preparing the lightweight aggregate by the sludge electromagnetic roasting treatment system comprises the following steps:

the method comprises the following steps: firstly, a certain amount of sludge with the water content of 25-35% is placed in a kiln body 1 to be roasted at 1150-1250 ℃, high-temperature flue gas is generated in the roasting process, the high-temperature flue gas enters a flue cavity 43 and is subjected to heat exchange with an inner side cavity 42, heat is then transferred to a water cavity 7 through the inner side cavity 42 to promote water temperature in the water cavity 7 to reach a certain temperature to generate water vapor, the water vapor moves upwards due to low density of the water vapor, the water vapor flows into the power generation box 2 through the arranged heat conduction pipe 3 to generate power, water drops are generated when the water vapor meets cold air outside the heat conduction pipe 3 in the flowing process, the water drops are collected when the water vapor passes through a baffle plate 16 and then fall at the bottom of the heat conduction pipe 3, the water drops gradually flow towards a countercurrent hole 17 direction, and flow into the water drops into the water cavity 7 again through the arranged countercurrent pipe 6, before the water vapor enters the power generation box 2, water drops on the inner part of the heat conduction pipe 3 flow into a connecting part between the inner side ring 82 and the heat conduction pipe 3, so that the water drops are detained, the detained water drops flow into the water storage box 10 through the filter pipe 9, at the moment, the water vapor enters the turbine blade protection box 11, the high-temperature and high-pressure water vapor is sprayed onto a turbine blade to rotate, the rotating shaft 12 is driven in the rotating process, and the generator in the generator box 13 is driven, so that the generated electricity is transmitted into the storage battery 14, the heat recovery is completed, and the power is supplied to the kiln body 1;

step two: flue gas after heat exchange occurs in the flue cavity 43 enters the drying box 19, sludge enters through the feed inlet, the sludge is heated in the drying box 17 under the action of the driving motor driving the stirring drum 21 to rotate, and simultaneously the sludge is stirred under the action of the stirring assembly, so that the water content of the original sludge entering is reduced to 30% from 80%, when the sludge passes through the bottom of the drying box 19, the baffle plate 24 can prevent the stirring sheet group II 23 from rotating, so that two stirring sheets of the stirring sheet group II 23 are opened, and meanwhile, two stirring sheets of the stirring sheet group I21 are also driven to be opened, the dried sludge can be accelerated to enter the ball making device for crushing, and a large amount of moisture can be discharged through the flue gas purification device after the sludge is dried by the flue gas;

step three: the crushed sludge enters the kiln body 1 for roasting at the temperature of 1150-1250 ℃ for 55-65min to prepare the lightweight aggregate with the size range: 5-30mm, bulk density: 500-1200kg/m3, barrel pressure: 10.0-20.0Mpa, sintering temperature: 1150-1250 ℃/1h, water absorption: less than or equal to 10 percent, the flue gas generated in the process generates electricity through the flue gas waste heat recovery box 4 to supply power to the kiln body 1, and the flue gas after heat exchange enters the drying box 19 to dry the subsequent sludge.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. The substitution may be of partial structures, devices, method steps, or may be a complete solution. The technical solution and the inventive concept thereof according to the present invention should be equally replaced or changed within the protection scope of the present invention.

Claims

1. Mud electromagnetism calcination processing system, its characterized in that: comprises a kiln body (1), a power generation box (2), a drying device and a ball making device, wherein the outer wall of the kiln body (1) is provided with a flue gas waste heat recovery box (4), the flue gas waste heat recovery tank (4) is arranged at the tail part of the kiln body (1) and is communicated with the interior of the kiln body (1), a supporting seat (5) is welded at the bottom of the flue gas waste heat recovery tank (4), a heat conduction pipe (3) is arranged at the top of the flue gas waste heat recovery tank (4), the bottom of the right end of the heat conducting pipe (3) is hermetically connected with the top of the power generation box (2), the outer wall of the heat conduction pipe (3) is hermetically connected with a counter-flow pipe (6), the flue gas waste heat recovery tank (4) is communicated with a drying device pipeline and dries sludge through flue gas for recovering waste heat, the sludge passing through the drying device enters the ball making device to be crushed and then enters the kiln body (1) to be roasted.

2. The electromagnetic sludge roasting treatment system of claim 1, wherein: flue gas waste heat recovery case (4) include outside chamber (41), inboard chamber (42) and flue chamber (43), the outer wall overlap joint of inside chamber (42) has water cavity (7), the outer wall of water cavity (7) and the inner wall overlap joint of outside chamber (41), the outer wall of heat pipe (3) runs through in outside chamber (41), just the bottom through connection of heat pipe (3) has water cavity (7), flue chamber (43) set up inboard in inside chamber (42) and with the inside intercommunication of the kiln body (1).

3. The electromagnetic sludge roasting treatment system of claim 2, wherein: the inner wall top fixed mounting of heat pipe (3) has baffler (16), retrograde hole (17) have been seted up to the inner wall bottom of heat pipe (3), the outer wall of retrograde hole (17) is inlayed and is fixedly connected with heat pipe (3), the inner wall sealing connection of retrograde hole (17) has countercurrent pipe (6).

4. The electromagnetic sludge roasting treatment system of claim 3, wherein: the top fixed mounting of power generation box (2) has water storage box (10), the top sealing connection of water storage box (10) has filter tube (9), the left end sealing connection of filter tube (9) has retaining ring (8), the inner wall top fixed mounting of power generation box (2) has turbine blade guard box (11), the axle center department of turbine blade guard box (11) inlays solid and is connected with pivot (12), the bottom embedding of pivot (12) is connected with generator case (13), pivot (12) are rotated through turbine blade guard box (11) that sets up and are connected with generator case (13), and the wiring end line connection of generator case (13) has battery (14), the right side of power generation box (2) is provided with electrical socket (15), the output terminal circuit and the kiln body (1) of battery (14) are connected.

5. The electromagnetic sludge roasting treatment system of claim 4, wherein: the water storage ring (8) comprises an outer side ring (81) and an inner side ring (82), the heat conduction pipe (3) is located between the outer side ring (81) and the inner side ring (82), the outer wall of the heat conduction pipe (3) penetrates through the bottom of the outer side ring (81), the outer wall of the heat conduction pipe (3) below the outer side ring (81) is connected with the bottom of the inner side ring (82) in a sealing mode, and the upper left end of the filter pipe (9) penetrates through the outer wall of the outer side ring (81) and the outer wall of the heat conduction pipe (3) and the bottom of the inner side ring (82) in an overlapping mode.

6. The electromagnetic sludge roasting treatment system of claim 5, wherein: the bottom of the generator box (13) and the bottom of the storage battery (14) are welded with the bottom of the inner wall of the generator box (2), and the top of the turbine blade protection box (11) is welded with the top of the inner wall of the generator box (2).

7. The electromagnetic sludge roasting treatment system of claim 6, wherein: the left side of the heat conduction pipe (3) is connected with a water inlet valve (18) in a penetrating mode, the bottom of the kiln body (1) is rotatably connected with an auxiliary supporting frame, and the bottom of the auxiliary supporting frame and the bottom of the supporting seat (5) are located on the same horizontal line.

8. The electromagnetic sludge roasting treatment system of claim 7, wherein: still include stoving case (19), be equipped with feed inlet, discharge gate, air inlet and exhaust port (20) on stoving case (19), the air inlet passes through pipeline and flue chamber (43) intercommunication, exhaust port (20) are located to install flue gas purification device, it extends to stoving case (19) inside to install driving motor and driving motor's output on stoving case (19), stoving case (19) inside be provided with driving motor's output fixed mounting's churn (21), a plurality of stirring subassembly is installed to circumference on churn (21).

9. The electromagnetic sludge roasting treatment system according to claim 8, wherein a baffle plate (24) is installed at the bottom of the drying box (19) located inside the stirring cylinder (21), the stirring assembly comprises a first stirring sheet set (22), a connecting assembly and a second stirring sheet set (23), the first stirring sheet set (22) is arranged between the stirring cylinder (21) and the inner wall of the drying box (19), the second stirring sheet set (23) is arranged inside the stirring cylinder (21), the first stirring sheet set (22) and the second stirring sheet set (23) both comprise two oppositely-opened stirring sheets, the stirring sheets of the second stirring sheet set (23) are both adapted to the baffle plate (24), the connecting assembly comprises a connecting shaft (25), a connecting rod (26), a guide groove (27) and a compression spring (28), the connecting shaft (25) is provided with two stirring sheets which are both rotatably installed on the stirring cylinder (21), connecting axle (25) is used for connecting a plectrum of stirring piece group one (22), stirring piece group two (23), connecting rod (26) set up the inboard at churn (21), connecting rod (26) are last to be equipped with and to have seted up guide way (27), guide way (27) inside symmetry is provided with two slider (29) and two compression spring (28), the one end fixed mounting of compression spring (28) is on guide way (27) inner wall, one side of other end fixed mounting at slider (29), slider (29) rotate respectively and install another plectrum on stirring piece group one (22), stirring piece group two (23).

10. The process for preparing lightweight aggregate by using the electromagnetic sludge roasting treatment system as claimed in claim 9, which is characterized by comprising the following steps of:

the method comprises the following steps: firstly, a certain amount of sludge with the water content of 25-35% is placed in a kiln body (1) to be roasted at 1150-1250 ℃, high-temperature flue gas is generated in the roasting process, enters a flue cavity (43) and is subjected to heat exchange with an inner side cavity (42), heat is transferred to a water cavity (7) through the inner side cavity (42) firstly, water vapor is generated when the temperature of the water in the water cavity (7) reaches a certain temperature, the water vapor moves upwards due to the low density of the water vapor, the water vapor flows into a power generation box (2) through an arranged heat conduction pipe (3) to generate power, water drops are generated when the water vapor meets cold air outside the heat conduction pipe (3) in the flowing process, the water drops can be converged when the water vapor passes through a blocking plate (16) and then fall to the bottom of the heat conduction pipe (3), the height of the heat conduction pipe (3) is uneven, and the water drops gradually flow in the direction of a counter flow hole (17), the water drops flow into the water cavity (7) again through the arranged counter-current pipe (6), before the water vapor enters the power generation box (2), the water drops on the inner part of the heat conduction pipe (3) flow into the connection part between the inner side ring (82) and the heat conduction pipe (3) to be retained, the retained water drops flow and are guided into the water storage box (10) through the filter pipe (9), at the moment, the water vapor enters the turbine blade protection box (11), the high-temperature and high-pressure water vapor is sprayed onto the turbine blade to rotate, the rotating shaft (12) is driven in the rotating process, and then the generator in the power generation box (13) is driven, so that the generated electricity is transmitted into the storage battery (14), the heat recovery is completed, and the power is generated to supply power to the kiln body (1);

step two: flue gas after heat exchange occurs in the flue cavity (43) enters the drying box (19), sludge enters through the feed inlet, the sludge is heated in the drying box (19) under the action of driving the stirring cylinder (21) to rotate by the driving motor, and is stirred under the action of the stirring assembly, so that the water content of the original sludge is reduced to 30% from 80%, when the sludge passes through the bottom of the drying box (19), the baffle (24) can prevent the stirring sheet set II (23) from rotating, so that two stirring sheets of the stirring sheet set II (23) are opened, and meanwhile, two stirring sheets of the stirring sheet set I (22) are also driven to be opened, the dried sludge can be accelerated to enter the ball making device for crushing, and a large amount of water is taken away after the sludge is dried by the flue gas and is discharged through the flue gas purification device;

step three: the crushed sludge enters a kiln body (1) for roasting at the temperature of 1150-1250 ℃ for 55-65min to prepare the lightweight aggregate with the size range: 5-30mm, bulk density: 500-1200kg/m³And cylinder pressure strength: 10.0-20.0MPa, sintering temperature: 1150-1250 ℃/1h, water absorption: less than or equal to 10 percent, and the flue gas generated in the process generates electricity through the flue gas waste heat recovery box (4) to supply power to the kiln body (1), and the flue gas after heat exchange enters the drying box (19) to dry the subsequent sludge.