CN115893786B - Microwave pyrolysis sludge drying system and device - Google Patents
Microwave pyrolysis sludge drying system and device Download PDFInfo
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- CN115893786B CN115893786B CN202211704668.5A CN202211704668A CN115893786B CN 115893786 B CN115893786 B CN 115893786B CN 202211704668 A CN202211704668 A CN 202211704668A CN 115893786 B CN115893786 B CN 115893786B
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- 239000010802 sludge Substances 0.000 title claims abstract description 88
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 86
- 238000001035 drying Methods 0.000 title claims abstract description 57
- 238000011084 recovery Methods 0.000 claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 230000006835 compression Effects 0.000 claims abstract description 29
- 238000007906 compression Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000004939 coking Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 20
- 230000007246 mechanism Effects 0.000 claims description 10
- 239000010865 sewage Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000001704 evaporation Methods 0.000 abstract description 5
- 230000008020 evaporation Effects 0.000 abstract description 5
- 239000002893 slag Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 239000003921 oil Substances 0.000 description 9
- 238000012856 packing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 210000003781 tooth socket Anatomy 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of hydraulic engineering, and provides a microwave pyrolysis sludge drying system and device, wherein the system comprises a vapor recovery device, a microwave pyrolysis drying device, a pyrolysis residue recovery device and an oil gas recovery device which are communicated with each other through pipelines, a microwave reaction cavity and a crushing cavity which are communicated with each other are arranged in the microwave pyrolysis drying device, and two sections of compression areas are arranged in the microwave reaction cavity; according to the invention, the microwave reaction cavity with the two sections of compression areas is arranged in the microwave pyrolysis drying device, so that the sludge is extruded once in the two sections of compression areas in sequence to further discharge water, and the heating areas which are staggered with the two sections of compression areas and are gradually increased in temperature are arranged in the microwave reaction cavity along the direction from the sludge inlet to the sludge outlet, so that the two times of microwave pyrolysis and coking treatment can be carried out in the process that the sludge passes through the compression areas, the water content in the sludge can be rapidly reduced, the drying efficiency is accelerated, and the problem of slow evaporation of the water in the sludge in the related technology is solved.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering, in particular to a microwave pyrolysis sludge drying system and device.
Background
The hydraulic engineering is a built engineering for controlling and allocating surface water and underground water in nature to achieve the aim of removing harm and benefiting. In the hydraulic engineering construction process, the river channel is cleaned frequently to generate a large amount of sludge, and the sludge is often accompanied with various greasy dirt, so that the random discharge can cause environmental pollution. Therefore, it is necessary to treat sludge generated during construction of hydraulic engineering by technical means. The microwave pyrolysis treatment is a more advantageous treatment means for sludge treatment than the conventional treatment means. The non-thermal effect of microwave pyrolysis can lead to molecular chain breakage to obtain more small molecular substances, and finally, the average molecular weight of the product is reduced. Therefore, in the sludge heat treatment process, the microwave technology is adopted, so that the heat treatment time can be shortened, the energy consumption can be reduced, and a large amount of oil resources can be recovered. In addition, the treated oil sludge does not produce secondary pollution any more, meets the principle of 'three-chemical', and has good industrial application prospect.
An apparatus and method for microwave pyrolysis of sludge is disclosed in application number CN 201610158334.0. The device for microwave pyrolysis of sludge comprises: a microwave reaction device, a vapor recovery device and an oil gas recovery device which are communicated with each other. The microwave reaction device comprises a microwave reaction cavity, wherein a first microwave generator arranged in the microwave reaction cavity enables the microwave reaction cavity to be provided with a plurality of temperature areas with sequentially increased temperatures in the direction from an inlet to an outlet of the microwave reaction cavity. According to the technology, microwaves are used as heat sources to replace a traditional heating method for pyrolyzing sludge, water, pyrolysis gas and pyrolysis residues are respectively obtained in a sectional heating and condensing mode, heat energy in a condensing process is fully utilized as a heat source for drying the sludge, and the purposes of energy conservation, environmental protection and sludge recycling are achieved.
However, the technology for treating the microwave pyrolysis sludge has the following problems in the implementation of the related art: the above-mentioned microwave pyrolysis sludge treatment mode is firstly through agitating unit to mud, combines microwave generator with mud moisture evaporation, and because earlier stage mud moisture is great, this kind of mode can make the evaporation of moisture in the mud slower, influences the work efficiency of equipment, in addition carry out pyrolysis desiccation back to mud through microwave generator in the microwave reaction chamber, mud is easy the tuberization to become the piece to cause its inside heat to be difficult to disperse, make thermal conversion efficiency reduce.
Disclosure of Invention
The invention provides a microwave pyrolysis sludge drying system and device, which solve the problems of slow evaporation of water in sludge and difficult dissipation of heat in sludge nodule blocks in the related art.
The technical scheme of the invention is as follows: the utility model provides a microwave pyrolysis sludge drying system, includes vapor recovery unit, microwave pyrolysis drying device, pyrolysis residue recovery unit and the oil gas recovery unit that communicate each other through the pipeline, be equipped with microwave reaction chamber and broken chamber of mutual intercommunication in the microwave pyrolysis drying device, be equipped with two sections compression zones in the microwave reaction chamber, mud is two sections carry out extrusion in proper order in the compression zone and then discharge moisture, be equipped with along mud import to the outlet direction in the microwave reaction chamber and set up and the heating zone that the temperature increases gradually with two sections compression zone, mud is extruded moisture and is got into after the desiccation of microwave heating in the microwave reaction chamber in broken intracavity, the sludge coking residue after the desiccation is discharged to bottom pyrolysis residue recovery unit after the broken intracavity is accomplished the breakage and is in pyrolysis residue recovery unit carries out secondary shop and turn-over stoving, obtains abundant desiccation after making the interior residual moisture stoving of residue, the heat in microwave pyrolysis device and the mixed vapor of pyrolysis residue recovery unit exhaust oil water is separated by oil gas recovery unit, and the heat in the mixed vapor enters vapor recovery unit and collects.
Preferably, the microwave pyrolysis drying device comprises a shell, an inner rotating rod, a first outer tube and a second outer tube are arranged on the inner side of the shell along the axial direction of the inner rotating rod, the first outer tube and the second outer tube are sleeved outside the two ends of the inner rotating rod, a driving mechanism for driving the inner rotating rod, the first outer tube and the second outer tube to rotate at a reduced speed in sequence is arranged at one end of the shell, one section of packing auger is fixed on the outer walls of the inner rotating rod, the first outer tube and the second outer tube, and two sections of compression areas are formed by differential rotation under driving of the driving mechanism between the packing augers.
Preferably, the driving mechanism comprises a motor, motor fixed mounting is in the outside end of casing, the output axle head fixedly connected with first band pulley of motor, fixedly connected with second band pulley on the lateral wall of first outer tube, the second band pulley passes through belt drive with first band pulley and is connected, first outer tube outer end fixedly connected with first sun gear, the meshing of the upper and lower side of first sun gear has first side gear, one side of first side gear is connected with first gear frame through the pivot rotation, first gear frame rotates with casing, inner transfer pole respectively and is connected, fixedly connected with second sun gear on the outer lateral wall of inner transfer pole near mud export one end, the upper and lower side meshing of second sun gear has the second side gear, one side of second side gear is connected with the second gear frame through the pivot rotation, the second gear frame rotates with casing, inner transfer pole respectively and is connected, be equipped with the annular tooth's socket that meshes with first side gear, second side gear respectively on the both ends inner wall of casing, the second side gear is connected with through pivot fixedly connected with second outer fixed connection with the outer disc.
Preferably, the inner rotating rod comprises a middle rod, a first outer connecting rod and a second outer connecting rod, the first outer connecting rod and the second outer connecting rod are symmetrically arranged on two sides of the middle rod, and locking parts are arranged at two ends of the middle rod.
Preferably, the locking component comprises a first electromagnetic ring, a spring and a second electromagnetic ring, two ends of the spring are fixedly connected with the first electromagnetic ring and the second electromagnetic ring respectively, the first electromagnetic ring is fixedly sleeved on the outer side of the middle rod, the second electromagnetic ring is rotatably sleeved on the outer sides of the first outer connecting rod and the second outer connecting rod, locking heads are arranged at two side end parts of the middle rod, and locking holes matched with the locking heads are formed in one ends, close to the middle rod, of the first outer connecting rod and the second outer connecting rod.
Preferably, the inner side of the shell is fixedly provided with an inner cylinder body, a clamping cavity is formed between the inner side of the shell and the outer side of the inner cylinder body, a sewage inlet pipe penetrating through the clamping cavity and communicated with a microwave reaction cavity in the inner cylinder body is arranged at the top of one end of the shell, an exhaust pipe communicated with the clamping cavity is arranged at the top of the other end of the shell, a drain pipe communicated with the clamping cavity is arranged at the bottom of one end of the shell, and a filter screen is fixedly arranged at the bottom of the inner cylinder body.
Preferably, the crushing cavity is a stirring cavity, a sewage outlet communicated with the microwave reaction cavity in the inner cylinder body is formed in one side of the stirring cavity, and a plurality of stirring rods which are uniformly distributed are fixed on the outer side wall of the second outer tube in the stirring cavity.
Preferably, a discharge hole is formed in the bottom of the stirring cavity, and an electric valve is arranged in the discharge hole.
Preferably, the pyrolysis residue recovery unit includes outer box, sliding connection has interior box in the outer box, the outer terminal surface fixed mounting of outer box has the cylinder, the output and the interior box fixed connection of cylinder, the inboard of interior box is provided with the conveyer belt, set up the direction spout that is used for carrying out slip spacing to the conveyer belt on the both sides inner wall of interior box, the notch has been seted up to the bottom both sides of interior box, be provided with the pushing plate in the notch, the both ends of pushing plate run through interior box and with the inner wall fixed connection of outer box.
Preferably, the inner part of the outer box body is communicated with the discharge port, one side of the top of the outer box body is provided with a heat return pipe, and the bottom surfaces of the two ends of the inner box body are provided with discharge ports.
The working principle and the beneficial effects of the invention are as follows:
1. according to the invention, the microwave reaction cavity with the two sections of compression areas is arranged in the microwave pyrolysis drying device, so that the sludge is extruded once in the two sections of compression areas in sequence to further discharge water, and the heating areas which are staggered with the two sections of compression areas and sequentially increase in temperature are arranged in the microwave reaction cavity along the direction from the sludge inlet to the sludge outlet, so that the two times of microwave pyrolysis and coking treatment can be carried out in the process that the sludge passes through the compression areas, the water content in the sludge can be rapidly reduced, the drying efficiency is accelerated, and the problem of slow evaporation of the water in the sludge in the related technology is solved;
2. according to the pyrolysis residue recovery device disclosed by the invention, the coked slag is repeatedly paved, the heat and water vapor in the slag can be sufficiently dispersed, residual moisture in the slag is sufficiently dried after being dried, the oil-water mixed vapor discharged by the microwave pyrolysis drying device and the pyrolysis residue recovery device is separated by the oil-gas recovery device, the oil-gas is separated for subsequent treatment, the heat in the oil-water mixed vapor enters the water vapor recovery device for collection, hot water is further supplied for use, the heat generated by the drying treatment is utilized, the energy conversion efficiency is improved, and the problem that the heat in the sludge nodule is difficult to disperse in the block in the related art is solved;
the inner rotating rod consists of the middle rod, the first outer connecting rod and the second outer connecting rod, wherein the two ends of the middle rod can be flexibly connected with the first outer connecting rod and the second outer connecting rod through the locking parts, the locking parts at the two ends of the middle rod have three working states, and under the three working states, the corresponding adjustment can be carried out according to the positions of sludge transmission, so that the drying treatment of sludge can be realized, meanwhile, the kinetic energy loss can be reduced, the work load of a motor can be reduced, and the transmission efficiency can be improved.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a microwave pyrolysis sludge drying system according to the present invention;
fig. 2 is a schematic structural diagram of a microwave pyrolysis drying device and a pyrolysis residue recycling device in a microwave pyrolysis sludge drying system provided by the invention;
fig. 3 is a schematic cross-sectional structure of a microwave pyrolysis drying device in the microwave pyrolysis sludge drying system provided by the invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3A according to the present invention;
fig. 5 is a schematic diagram of a cross-sectional structure of a microwave pyrolysis drying device in a microwave pyrolysis sludge drying system according to another aspect of the present invention;
FIG. 6 is an enlarged schematic view of the structure of FIG. 5B according to the present invention;
fig. 7 is a schematic diagram of a front cross-sectional structure of a microwave pyrolysis drying device in a microwave pyrolysis sludge drying system according to the present invention;
fig. 8 is a schematic diagram of a front section structure of an inner rotating rod in a microwave pyrolysis sludge drying system according to the present invention;
FIG. 9 is an enlarged schematic view of the structure of FIG. 8C according to the present invention;
fig. 10 is a schematic diagram of an exploded structure of a locking component in a microwave pyrolysis sludge drying system according to the present invention;
FIG. 11 is a schematic diagram showing a front sectional structure of a pyrolysis residue recovery device in a microwave pyrolysis sludge drying system according to the present invention;
fig. 12 is a schematic structural diagram of an inner box in a first state in a microwave pyrolysis sludge drying system according to the present invention;
fig. 13 is a schematic diagram of a second state structure of an inner box in the microwave pyrolysis sludge drying system according to the present invention;
fig. 14 is a schematic structural diagram of a third state of an inner box in the microwave pyrolysis sludge drying system according to the present invention;
fig. 15 is a schematic structural diagram of a fourth state of an inner tank in the microwave pyrolysis sludge drying system according to the present invention;
in the figure: 1. a water vapor recovery device; 2. a microwave pyrolysis drying device; 21. a housing; 211. a sewage inlet pipe; 212. an exhaust pipe; 213. a drain pipe; 214. an inner cylinder; 215. a filter screen; 216. a sewage outlet; 217. a stirring cavity; 218. a stirring rod; 219. an electric valve; 22. an inner rotating rod; 221. an intermediate lever; 2211. a lock head; 222. a first outer connecting rod; 223. a second outer extension rod; 2231. a lock hole; 224. a locking member; 2241. a first electromagnetic ring; 2242. a spring; 2243. a second electromagnetic ring; 23. a first outer tube; 24. a second outer tube; 25. a driving mechanism; 251. a motor; 252. a first pulley; 253. a second pulley; 254. a belt; 255. a first carrier; 256. a first sun gear; 257. a first side gear; 258. a second carrier; 259. a second sun gear; 2510. a second side tooth; 2511. a fixed plate; 2512. annular tooth slots; 26. an auger; 3. pyrolysis residue recovery device; 31. an outer case; 32. a heat return pipe; 33. an inner case; 34. a cylinder; 35. a conveyor belt; 36. a guide chute; 37. a pushing plate; 38. a feed opening; 39. a notch; 4. an oil gas recovery device.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: a microwave pyrolysis sludge drying system and device comprises a vapor recovery device 1, a microwave pyrolysis drying device 2, a pyrolysis residue recovery device 3 and an oil gas recovery device 4 which are communicated with each other through pipelines, wherein a microwave reaction cavity and a crushing cavity which are communicated with each other are arranged in the microwave pyrolysis drying device 2, two sections of compression areas are arranged in the microwave reaction cavity, sludge is extruded once in the two sections of compression areas in sequence so as to discharge water, heating areas which are staggered with the two sections of compression areas and are gradually increased in temperature are arranged in the microwave reaction cavity along the direction from a sludge inlet to an outlet (the sludge inlet is a sewage inlet pipe 211, the sludge outlet is a sewage outlet 216), namely, a microwave generating device (not shown in the drawing) is arranged in the area, so that the temperature of the sludge is firstly lower after entering the microwave reaction cavity, the area is gradually increased, the temperature of the regional section is between 600 ℃ and 800 ℃, the temperature region can lead heavy oil, asphalt and other organic substances in the sludge to be completely cracked due to high temperature, further pyrolysis treatment under a microwave environment is realized, then the sludge enters the regional section with higher temperature, the temperature of the regional section is rapidly increased, the temperature of the regional section is between 800 ℃ and 900 ℃, the pyrolysis residue can be completely coked at the temperature, further coking treatment of the pyrolysis residue is realized, the sludge extrudes moisture in a microwave reaction cavity and enters a crushing cavity after being dried by microwave heating, the sludge coking residue is discharged to a bottom pyrolysis residue recovery device 3 after being crushed in the crushing cavity, the crushed coking residue is repeatedly paved and turned over in the pyrolysis residue recovery device 3 for drying, and the residual moisture in the residue is fully dried after being dried, the oil-water mixed steam discharged by the microwave pyrolysis drying device 2 and the pyrolysis residue recovery device 3 is separated by the oil-gas recovery device 4, the oil-gas is separated for subsequent treatment, heat in the oil-water mixed steam enters the water-steam recovery device 1 for collection, hot water is further supplied for use, and heat generated by drying treatment is utilized to maximize energy conversion benefit.
Referring to fig. 2-6, the microwave pyrolysis drying device 2 includes a housing 21, an inner rotating rod 22, a first outer tube 23 and a second outer tube 24 are disposed on the inner side of the housing 21 along the axial direction thereof, the first outer tube 23 and the second outer tube 24 are sleeved outside two ends of the inner rotating rod 22, a driving mechanism 25 for driving the inner rotating rod 22, the first outer tube 23 and the second outer tube 24 to rotate in a speed-reducing manner is disposed at one end of the housing 21, a section of packing auger 26 is fixed on the outer walls of the inner rotating rod 22, the first outer tube 23 and the second outer tube 24, two sections of compression areas are formed by differential rotation between the three packing augers 26 under the driving of the driving mechanism 25, sludge is accumulated and compressed in the two sections of compression areas, and water is compressed, so as to accelerate drying efficiency, as shown in fig. 4 and 6, the driving mechanism 25 includes a motor 251, the motor 251 is fixedly mounted at the outer end of the housing 21, the output shaft end of the motor 251 is fixedly connected with a first belt pulley 252, the outer side wall of the first outer tube 23 is fixedly connected with a second belt wheel 253, the second belt wheel 253 is in transmission connection with the first belt wheel 252 through a belt 254, the outer end part of the first outer tube 23 is fixedly connected with a first sun gear 256, a first side gear 257 is meshed up and down of the first sun gear 256, one side of the first side gear 257 is rotationally connected with a first gear frame 255 through a rotating shaft, the first gear frame 255 is respectively rotationally connected with the shell 21 and the inner rotating rod 22, one end outer side wall of the inner rotating rod 22 close to a sludge outlet is fixedly connected with a second sun gear 259, the upper side and the lower side of the second sun gear 259 are meshed with a second side gear 2510, one side of the second side gear 2510 is rotationally connected with a second gear frame 258 through the rotating shaft, the second gear frame 258 is respectively rotationally connected with the shell 21 and the inner rotating rod 22, and inner walls at two ends of the shell 21 are respectively provided with a second side gear 257, the other side of the second side gear 2510 is fixedly connected with a fixed disc 2511 through a rotating shaft, the fixed disc 2511 is fixedly connected with the second outer tube 24, the first belt wheel 252 can be driven to rotate when the motor 251 works, the first outer tube 23 can drive the first central gear 256 to synchronously rotate under the transmission action of the belt 254, the first central gear 256 is meshed with the first side gear 257, the first side gear 257 is meshed with the annular tooth socket 2512 on the inner wall of the shell 21, the speed reduction transmission is realized, namely the rotating speed of the inner rotating rod 22 is smaller than that of the first outer tube 23, so that a first compression area can be formed between the first outer tube 23 and the auger 26 of the inner rotating rod 22, and the second central gear 259 at the other end of the inner rotating rod 22 is meshed with the second side gear 2510 and the annular tooth socket 2512 on the inner wall of the shell 21, namely the rotating speed of the second outer tube 24 is smaller than that of the inner rotating rod 22, and a second compression area can be formed between the inner rotating rod 22 and the auger 26 of the second outer tube 24.
Referring to fig. 7 and 8, the inner rotating rod 22 includes a middle rod 221, a first outer connecting rod 222 and a second outer connecting rod 223, the first outer connecting rod 222 and the second outer connecting rod 223 are symmetrically disposed at two sides of the middle rod 221, two ends of the middle rod 221 are respectively provided with a locking member 224, as shown in fig. 9 and 10, the locking member 224 includes a first electromagnetic ring 2241, a spring 2242 and a second electromagnetic ring 2243, two ends of the spring 2242 are respectively fixedly connected with the first electromagnetic ring 2241 and the second electromagnetic ring 2243, the first electromagnetic ring 2241 is fixedly sleeved outside the middle rod 221, the second electromagnetic ring 2243 is rotatably sleeved outside the first outer connecting rod 222 and the second outer connecting rod 223, two side ends of the middle rod 221 are provided with locking heads 2211, one ends of the first outer connecting rod 222 and the second outer connecting rod 223 close to the middle rod 221 are respectively provided with locking holes 2231 adapted to the locking heads 2211, the first electromagnetic ring 2241 and the second electromagnetic ring 2243 can generate magnetic force under the electrified state, the middle rod 221 can approach to the first outer connecting rod 222 or the second outer connecting rod 223, the middle rod 221 has three working states through the two-end locking parts 224, the first is that the middle rod 221 is butted with the second outer connecting rod 223 through the right-end locking part 224, when the first outer connecting rod 222 rotates, the middle rod 221 and the second outer connecting rod 223 can not rotate, the second is that the middle rod 221 is butted with the first outer connecting rod 222 through the left-end locking part 224, when the first outer connecting rod 222 rotates, the second outer connecting rod 223 can not rotate, the third is that the middle rod 221 is butted with the first outer connecting rod 222 and the second outer connecting rod 223 through the two-end locking part 224, namely, the first electromagnetic ring 2241 and the second electromagnetic ring 2243 on the two-end locking part 224 are in the power-off state, the middle rod 221 is under the elastic force of the two-end springs 2242 at the middle position, and the first outer connecting rod 222, the intermediate rod 221 rotates in synchronization with the second outer connecting rod 223.
Referring to fig. 3, an inner cylinder 214 is fixed on the inner side of the housing 21, a clamping cavity is formed between the inner side of the housing 21 and the outer side of the inner cylinder 214, a sewage inlet pipe 211 penetrating the clamping cavity and communicating with the microwave reaction cavity in the inner cylinder 214 is arranged at the top of one end of the housing 21, an exhaust pipe 212 communicating with the clamping cavity is arranged at the top of the other end of the housing 21, a drain pipe 213 communicating with the clamping cavity is arranged at the bottom of one end of the housing 21, and a filter screen 215 is fixedly arranged at the bottom of the inner cylinder 214.
Referring to fig. 3 and 6, the crushing cavity is specifically a stirring cavity 217, a drain outlet 216 communicating with the microwave reaction cavity in the inner cylinder 214 is provided at one side of the stirring cavity 217, a plurality of stirring rods 218 uniformly distributed are fixed on the outer side wall of the second outer tube 24 positioned in the stirring cavity 217, a drain outlet is provided at the bottom of the stirring cavity 217, and an electric valve 219 is provided in the drain outlet.
Referring to fig. 11, the pyrolysis residue recovery unit 3 includes an outer case 31, an inner case 33 is slidably connected in the outer case 31, a cylinder 34 is fixedly mounted on an outer end surface of the outer case 31, an output end of the cylinder 34 is fixedly connected with the inner case 33, a conveyor belt 35 is disposed on an inner side of the inner case 33, guide sliding grooves 36 for sliding and limiting the conveyor belt 35 are disposed on inner walls of two sides of the inner case 33, notches 39 are disposed on two sides of a bottom of the inner case 33, a pushing plate 37 is disposed in the notches 39, two ends of the pushing plate 37 penetrate through the inner case 33 and are fixedly connected with an inner wall of the outer case 31, an inner portion of the outer case 31 is communicated with a discharge port, a heat return pipe 32 is disposed on one side of a top of the outer case 31, the heat return pipe 32 is communicated with the oil gas recovery unit 4, and a discharging port 38 is disposed on bottom surfaces of two ends of the inner case 33 for thoroughly discharging dried sludge.
The working principle and the using flow of the invention are as follows: the sludge to be treated enters the sludge inlet end of the microwave reaction cavity of the inner cylinder 214 through the sewage inlet pipe 211, the middle rod 221 is locked with the second external connecting rod 223 through the locking part 224 at one end, at the moment, the locking part 224 at the other end of the middle rod 221 is disconnected with the first external connecting rod 222, namely, the middle rod 221 and the second external connecting rod 223 can not rotate when the first external connecting rod 222 rotates, the first belt wheel 252 is driven to rotate when the motor 251 works, the first outer pipe 23 is driven to rotate by the second belt wheel 253 under the transmission action of the belt 254, the sludge is pushed forwards continuously through the auger 26 on the first outer pipe 23, and the sludge passes through a heating area at a relatively low temperature in the process, so that heavy oil, asphalt and other organic substances in the sludge can be completely cracked due to high temperature, and further pyrolysis treatment in a microwave environment is realized;
immediately before the sludge enters the compression zone, the middle rod 221 is quickly locked with the second outer connecting rod 223 through the locking part 224 at one end, the locking part 224 at the other end of the middle rod 221 is separated from the second outer connecting rod 223, namely, when the first outer connecting rod 222 rotates, the middle rod 221 synchronously rotates, but the second outer connecting rod 223 cannot rotate, in the process of rotating the first outer tube 23, the meshing relationship between the first central gear 256 and the first side gear 257 at the end part of the first outer tube 23 and the first side gear 257 and the annular tooth socket 2512 on the inner wall of the shell 21 can ensure that the first outer connecting rod 222 and the middle rod 221 synchronously rotate along with the first outer tube 23, and the sludge can be gradually accumulated in the compression zone between the first outer tube 23 and the auger 26 on the middle rod 221 by utilizing the speed reduction principle of the first outer connecting rod 222, so that the sludge can extrude excessive moisture under the compression action when passing through the zone, the sludge is then continuously conveyed forward after passing through the area, before passing through the area, the middle rod 221 is kept simultaneously locked with the first external connecting rod 222 and the second external connecting rod 223 through the two-end locking parts 224, namely, when the first external connecting rod 222 rotates, the first external connecting rod 222 and the second external connecting rod 223 synchronously rotate, the sludge can be gradually accumulated in a compression area between the middle rod 221 and the auger 26 on the second external pipe 24 by utilizing the same speed reducing principle, the sludge can be further extruded with excessive water under the compression effect when passing through the area, the sludge passes through a heating area under relatively high temperature in the process, the pyrolysis residues can be completely coked at the temperature, the coking treatment of the pyrolysis residues is further realized, the coked residues are continuously conveyed forward after passing through the area, and then discharged into the stirring cavity 217 through the drain outlet 216, and the stirring rod 218 is driven to rotate while being rotated by the second external connecting rod 223, crushing the mixture into slag in the stirring cavity 217, and discharging the slag by controlling the opening and closing of the electric valve 219;
as shown in fig. 11 and 12, in the initial state, the inner box 33 is located at the right side of the outer box 31, the conveyor belt 35 is located at the right end of the guiding chute 36, the inner box 33 is pushed by the air cylinder 34 to gradually move leftwards, the right roller of the conveyor belt 35 is blocked by the guiding chute 36, so that the conveyor belt 35 moves leftwards synchronously along with the inner box 33, in the process, the electric valve 219 is synchronously opened to discharge coked slag, so that coked slag can be paved on the upper surface of the conveyor belt 35, the heat and steam of the slag are favorably dispersed, the inner box 33 is located at the left position in the outer box 31, at the moment, the device is shown in fig. 13, then the inner box 33 is pulled back by the air cylinder 34, the right roller of the conveyor belt 35 is not blocked by the guiding chute 36 any more, so that the conveyor belt 35 can stay at the position, in this process, the conveyor belt 35 works anticlockwise, so that the slag on the upper surface can be conveyed to the left side and fall onto the bottom inner wall of the inner box 33, and since the inner box 33 moves to the right side, the fallen slag can be spread on the bottom inner wall of the inner box 33 again after being turned over, further the internal heat and steam of the slag are dispersed, the device is shown in fig. 14, and the pushing plate 37 is stationary relative to the inner box 33 along with the continued right movement of the inner box 33, so that the inner box 33 scrapes the slag at the bottom to the bottom of the outer box 31 by the left side blanking opening 38 in the moving process, the device is shown in fig. 15, and then is collected by the outer box 31, and the inner box 33 and the conveyor belt 35 gradually return to the initial position, thereby completing the one-time pushing process.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The microwave pyrolysis sludge drying system comprises a vapor recovery device (1), a microwave pyrolysis drying device (2), a pyrolysis residue recovery device (3) and an oil gas recovery device (4) which are communicated with each other through pipelines, and is characterized in that a microwave reaction cavity and a crushing cavity which are communicated with each other are arranged in the microwave pyrolysis drying device (2);
two sections of compression areas are arranged in the microwave reaction cavity, and sludge is extruded in the two sections of compression areas for one time in sequence so as to discharge water;
a heating zone which is staggered with the two sections of compression zones and sequentially increases in temperature is arranged in the microwave reaction cavity along the direction from the sludge inlet to the sludge outlet, and the sludge extrudes water in the microwave reaction cavity and enters the crushing cavity after being heated and dried by microwaves;
discharging sludge coking residues into a bottom pyrolysis residue recovery device (3) after the sludge coking residues are crushed in a crushing cavity, and performing secondary paving, turning and drying on the crushed residues in the pyrolysis residue recovery device (3) to fully dry residual moisture in the residues after drying;
the oil-water mixed steam discharged by the microwave pyrolysis drying device (2) and the pyrolysis residue recovery device (3) is separated by the oil-gas recovery device (4), and heat in the oil-water mixed steam enters the water vapor recovery device (1) for collection;
the microwave pyrolysis drying device (2) comprises a shell (21), an inner rotating rod (22), a first outer tube (23) and a second outer tube (24) are arranged on the inner side of the shell (21) along the axial direction of the shell, the first outer tube (23) and the second outer tube (24) are sleeved outside two ends of the inner rotating rod (22), a driving mechanism (25) for driving the inner rotating rod (22), the first outer tube (23) and the second outer tube (24) to rotate in a speed-reducing mode in sequence is arranged at one end of the shell (21), a section of auger (26) is fixed on the outer walls of the inner rotating rod (22), the first outer tube (23) and the second outer tube (24), and three augers (26) rotate in a differential mode under driving of the driving mechanism (25) to form two sections of compression areas;
the driving mechanism (25) comprises a motor (251), the motor (251) is fixedly arranged at the outer side end of the shell (21), a first belt pulley (252) is fixedly connected to the output shaft end of the motor (251), a second belt pulley (253) is fixedly connected to the outer side wall of the first outer tube (23), the second belt pulley (253) is in transmission connection with the first belt pulley (252) through a belt (254), a first central gear (256) is fixedly connected to the outer end of the first outer tube (23), a first side gear (257) is meshed above and below the first central gear (256), a first gear carrier (255) is connected to one side of the first side gear (257) through a rotating shaft in a rotating mode, the first gear carrier (255) is respectively connected with the shell (21) and an inner rotating rod (22) in a rotating mode, a second central gear (259) is fixedly connected to the outer side wall of one end of the inner rotating rod (22) close to a sludge outlet, a second side gear (2510) is meshed above and below the second central gear (259), a first side gear carrier (257) is respectively connected to the first side of the shell (21) through the rotating shaft, and two ends of the first gear carrier (258) are respectively connected to the first gear carrier (257) in a rotating mode, and the two ends of the shell (258) are respectively connected to the rotating rod (21 and the inner rotating rod (22) respectively The annular tooth grooves (2512) are meshed with the second side teeth (2510), a fixed disc (2511) is fixedly connected to the other side of the second side teeth (2510) through a rotating shaft, and the fixed disc (2511) is fixedly connected with the second outer tube (24);
the inner rotating rod (22) comprises a middle rod (221), a first outer connecting rod (222) and a second outer connecting rod (223), wherein the first outer connecting rod (222) and the second outer connecting rod (223) are symmetrically arranged on two sides of the middle rod (221), and locking parts (224) are arranged at two ends of the middle rod (221).
2. The microwave pyrolysis sludge drying system according to claim 1, wherein the locking component (224) comprises a first electromagnetic ring (2241), a spring (2242) and a second electromagnetic ring (2243), two ends of the spring (2242) are fixedly connected with the first electromagnetic ring (2241) and the second electromagnetic ring (2243) respectively, the first electromagnetic ring (2241) is fixedly sleeved outside the middle rod (221), the second electromagnetic ring (2243) is rotatably sleeved outside the first outer connecting rod (222) and the second outer connecting rod (223), locking heads (2211) are arranged at two side end parts of the middle rod (221), and locking holes (2231) matched with the locking heads (2211) are formed in one ends, close to the middle rod (221), of the first outer connecting rod (222) and the second outer connecting rod (223).
3. The microwave pyrolysis sludge drying system according to claim 1, wherein an inner cylinder (214) is fixed on the inner side of the shell (21), a clamping cavity is formed between the inner side of the shell (21) and the outer side of the inner cylinder (214), a sewage inlet pipe (211) penetrating the clamping cavity and communicated with the microwave reaction cavity in the inner cylinder (214) is arranged at the top of one end of the shell (21), an exhaust pipe (212) communicated with the clamping cavity is arranged at the top of the other end of the shell (21), a drain pipe (213) communicated with the clamping cavity is arranged at the bottom of one end of the shell (21), and a filter screen (215) is fixedly arranged at the bottom of the inner cylinder (214).
4. A microwave pyrolysis sludge drying system according to claim 3, wherein the crushing cavity is specifically a stirring cavity (217), a drain outlet (216) communicated with the microwave reaction cavity in the inner cylinder body (214) is formed on one side of the stirring cavity (217), and a plurality of stirring rods (218) which are uniformly distributed are fixed on the outer side wall of the second outer tube (24) in the stirring cavity (217).
5. The microwave pyrolysis sludge drying system as claimed in claim 4, wherein a discharge outlet is provided at the bottom of the stirring chamber (217), and an electric valve (219) is provided in the discharge outlet.
6. The microwave pyrolysis sludge drying system according to claim 5, wherein the pyrolysis residue recovery device (3) comprises an outer box body (31), an inner box body (33) is connected in the inner box body (31), an air cylinder (34) is fixedly arranged on the outer end face of the outer box body (31), the output end of the air cylinder (34) is fixedly connected with the inner box body (33), a conveyor belt (35) is arranged on the inner side of the inner box body (33), guide sliding grooves (36) for sliding limiting the conveyor belt (35) are formed in the inner walls of the two sides of the inner box body (33), notches (39) are formed in the two sides of the bottom of the inner box body (33), and pushing plates (37) are arranged in the notches (39), and the two ends of each pushing plate (37) penetrate through the inner box body (33) and are fixedly connected with the inner wall of the outer box body (31).
7. The microwave pyrolysis sludge drying system according to claim 6, wherein the inside of the outer box body (31) is communicated with the discharge port, a heat return pipe (32) is arranged on one side of the top of the outer box body (31), and the bottom surfaces of the two ends of the inner box body (33) are provided with the discharge ports (38).
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| KR20200080880A (en) * | 2018-12-27 | 2020-07-07 | 조북룡 | Apparatus for Drying Sludge using Microwave and Heat Medium |
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| CN101838096A (en) * | 2010-02-11 | 2010-09-22 | 浙江科力尔环保设备有限公司 | Sludge helix extrusion device in sewage treatment |
| CN104163555A (en) * | 2014-07-10 | 2014-11-26 | 浙江大学 | Consecutive reaction apparatus for moisture sludge through anhydration and pyrolysis under microwave irradiation as well as method thereof |
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| CN115893786A (en) | 2023-04-04 |
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