CN114835370A

CN114835370A - Sludge low-temperature drying coupling pyrolysis device

Info

Publication number: CN114835370A
Application number: CN202210463115.9A
Authority: CN
Inventors: 夏玉坤; 陈鑫波; 程正奇; 许晗; 金喆浩; 周恩峰
Original assignee: Hangzhou Zhenyi Environmental Protection Technology Co ltd
Current assignee: Hangzhou Zhenyi Environmental Protection Technology Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-08-02
Anticipated expiration: 2042-04-28
Also published as: CN114835370B

Abstract

The invention discloses a sludge low-temperature drying coupling pyrolysis device which comprises a machine body, a feeding assembly, a drying assembly, a solid-gas separation assembly and a pyrolysis furnace, wherein the feeding assembly is arranged on the machine body and used for feeding dehydrated sludge, the drying assembly is positioned on one side of the feeding assembly and is arranged in the machine body, the solid-gas separation assembly is positioned on one side of the drying assembly and is arranged in the machine body, and the pyrolysis furnace is communicated with the machine body and is fixedly arranged on the machine body.

Description

Sludge low-temperature drying coupling pyrolysis device

Technical Field

The invention relates to the technical field of sludge treatment, in particular to a low-temperature drying and coupling pyrolysis device for sludge.

Background

In recent years, with the accelerated increase of sewage quantity and treatment rate of Chinese cities, the sludge quantity is accelerated, the sludge is a byproduct after sewage treatment, is a non-uniform mass consisting of organic matters, bacterial thalli, pathogens and the like, and causes harm to the health of people around and secondary pollution to the surrounding environment if improper treatment is performed, the traditional sludge treatment is to dry the sludge, greatly reduce the volume and the weight of the sludge and send the sludge to subsequent treatment, no matter the sludge is dried at low temperature, dried at medium temperature and dried at high temperature, a large amount of heat is needed for evaporation of water in the sludge, the dried sludge adopts a pyrolysis mode, pyrolysis is used as a common technical means in petrochemical industry and coal chemical industry, the sludge is transplanted to a sludge treatment process, and organic matters in the sludge are decomposed into small molecular substances at the high temperature of 600 ℃ by utilizing the characteristic of pyrolysis oxygen deficiency/oxygen exclusion, and simultaneously becomes a pyrolysis gas, and the pyrolysis gas becomes a cleaner gas flow containing a certain heat value after being sprayed and dedusted, and can be used as a heat source in the pyrolysis process.

However, in the traditional sludge drying pyrolysis treatment process, the high-temperature flue gas after pyrolysis generally can be recycled by using a low-pressure steam mode produced by a waste heat boiler, the joint degree of the drying process and the pyrolysis process is insufficient, meanwhile, the drying process cannot be automatically fed, and the drying efficiency is slow and the drying effect is poor due to sludge accumulation.

Disclosure of Invention

The invention provides a sludge low-temperature drying coupling pyrolysis device for overcoming the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a sludge low-temperature drying coupling pyrolysis device comprises a machine body, a feeding assembly, a drying assembly, a solid-gas separation assembly and a pyrolysis furnace, wherein the feeding assembly is arranged on the machine body and used for feeding dehydrated sludge, the drying assembly is positioned on one side of the feeding assembly and is arranged in the machine body, the solid-gas separation assembly is positioned on one side of the drying assembly and is arranged in the machine body, and the pyrolysis furnace is communicated with the machine body and is fixedly arranged on the machine body; the material loading subassembly includes first baffle, the fixed housing of locating on the first baffle, first ring and the second ring of locating on housing and the organism simultaneously fixedly, both ends rotate respectively and locate the hollow commentaries on classics roller on first ring and the second ring, the fixed base of locating on the organism, rotate and locate on the base and fixed the driving shaft of locating in the hollow commentaries on classics roller, be used for driving shaft pivoted motor on the fixed base of locating, the fixed air inlet box of locating on the housing lateral wall, locate the gas blow hole that is used for with the air inlet box intercommunication on the housing, a plurality of heating pipes of gas blow hole department are located to the equidistance interval, a plurality of first swash plates that the outside interval of by hollow commentaries on classics roller becomes the setting gradually.

The hollow roller that changes includes the roll body, equidistance annular distribution just rotates and locates a plurality of first pivots on the roll body, the fixed epaxial centrifugal plate of first pivot of locating, the cover is located the first pivot outside and is fixed the arc round bar of locating on the roll body, the portable one end is located on the arc round bar and the other end is fixed locates the epaxial connecting plate of first pivot, rotate and locate the gyro wheel on the centrifugal plate, locate a plurality of fixed plates on the centrifugal plate by low to high and equidistance interval, the cover is located on the arc round bar and both ends are fixed respectively and are located the first spring on roll body and the connecting plate.

The movable roof plate is characterized in that a guide rail is arranged on the housing, a first groove and a second groove are formed in the guide rail, the movable roof plate is located at the second groove and can be movably arranged on the guide rail, an arc-shaped surface is arranged on the roof plate, two ends of the second spring are fixedly arranged on the guide rail and the roof plate and are used for resetting the roof plate, and the idler wheel is located on the guide rail and rolls.

The material loading subassembly is still including rotating first driving roller and the second driving roller of locating on the organism, around locating first transportation area on first driving roller and the second driving roller, the fixed scraper blade of locating on the housing, fixed cover locates the first gear on the first driving roller, set up and rotate the second gear of locating on the base with first gear engagement, fixed cover locates on the driving shaft and the intermittent type nature gear that sets up with second gear engagement, third driving roller and the fourth driving roller on the organism are located in the rotation, around locating the second transportation area on third driving roller and the fourth driving roller, fixed cover locates the third gear on the third driving roller, set up and rotate the fourth gear of locating on the base with third gear engagement, fixed cover locates on the driving shaft and the fifth gear that sets up with fourth gear engagement.

The feeding assembly further comprises a feeding hole, a cover plate, a movable plate, a through groove, an air cylinder and a hopper, wherein the feeding hole is located above the first conveying belt and is arranged on the machine body, the cover plate is located at the feeding hole and is fixedly arranged on the machine body, the movable plate is movably arranged on the cover plate, the through groove is arranged on the movable plate, the air cylinder is fixedly arranged on the machine body and is used for driving the movable plate to move, and the hopper is fixedly arranged on the cover plate.

The drying assembly comprises a second partition plate and a third partition plate which are fixedly arranged on the machine body, a guide plate fixedly arranged on the third partition plate, a plurality of convex parts which are equidistantly arranged on the guide plate at intervals, a plurality of circular fixing columns which are positioned between the second partition plate and the third partition plate and are equidistantly and fixedly arranged on the machine body, a plurality of gas pipes which are positioned below the circular fixing columns and are fixedly arranged on the machine body at two ends, a fifth driving roller and a sixth driving roller which are rotatably arranged on the machine body, a third conveying belt wound on the fifth driving roller and the sixth driving roller, a plurality of baffle plates fixedly arranged on the third conveying belt at intervals, and a driving belt wound on the fourth driving roller and the fifth driving roller; a plurality of circular fixed columns are arranged in a staggered mode.

The solid-gas separation component comprises a plurality of fourth partition plates, a second inclined plate, a plurality of through holes, an air inlet and an air outlet, wherein the fourth partition plates are gradually increased from the third partition plates to the pyrolysis furnace and are fixedly arranged on the machine body at equal intervals; the through holes are obliquely and downwards arranged, and the through holes on the adjacent fourth partition plates are arranged in a staggered mode.

The invention has the following advantages: the invention firstly carries out automatic feeding on sludge (sludge subjected to filter pressing) through a feeding assembly, simultaneously can realize quantitative feeding, and leads the sludge to carry out centrifugal motion, removes partial moisture in the sludge in the centrifugal process, the centrifuged sludge finally falls into a drying assembly, the sludge is heated and dried through the drying assembly, the dried sludge is conveyed into a pyrolysis furnace, the smoke, fixed dust and water vapor generated in the drying process are separated through a solid-gas separation assembly, the solid dust is precipitated and then can enter the pyrolysis furnace together with the dried sludge through the solid-gas separation assembly, the sludge is further treated through the pyrolysis furnace, the air treated by the pyrolysis furnace is purified, one part of the purified air is used on the feeding assembly, the other part is used on the pyrolysis furnace, the combination degree of the drying process and the pyrolysis process is high through the arrangement, the sludge is more convenient to be dried in the centrifugal movement process of the sludge, and the drying efficiency is high and the effect is good.

Drawings

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

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

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is an enlarged view of fig. 3 at B.

Fig. 5 is a sectional view taken along line B-B of fig. 3.

Fig. 6 is an enlarged view of a portion a in fig. 5.

Fig. 7 is a sectional view taken along line C-C of fig. 3.

Fig. 8 is an enlarged view of fig. 7 at C.

Fig. 9 is a partial sectional view taken along line D-D in fig. 3.

Fig. 10 is a partial sectional view taken along line E-E of fig. 3.

Fig. 11 is a sectional view taken along line F-F in fig. 3.

Fig. 12 is an enlarged view of fig. 11 at D.

Detailed Description

In order to make the technical solutions of the present invention better understood, 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-12, a sludge low-temperature drying coupling pyrolysis device comprises a machine body 1, a feeding assembly 2 arranged on the machine body and used for feeding dehydrated sludge, a drying assembly 3 arranged on one side of the feeding assembly and arranged in the machine body, a solid-gas separation assembly 4 arranged on one side of the drying assembly and arranged in the machine body, and a pyrolysis furnace 5 communicated with the machine body and fixedly arranged on the machine body; the feeding assembly 2 comprises a first partition plate 21, a housing 22 fixedly arranged on the first partition plate, a first circular ring 23 and a second circular ring 24 fixedly arranged on the housing and the machine body at the same time, hollow rotating rollers 25 with two ends respectively rotatably arranged on the first circular ring and the second circular ring, a base 26 fixedly arranged on the machine body, a driving shaft 27 rotatably arranged on the base and fixedly arranged in the hollow rotating rollers, a motor 28 fixedly arranged on the base and used for driving the driving shaft to rotate, an air inlet box 29 fixedly arranged on the side wall of the housing, an air blowing hole 210 arranged on the housing and used for being communicated with the air inlet box, a plurality of heating pipes 211 arranged at equal intervals at the air blowing hole, and a plurality of first inclined plates 212 arranged by gradually increasing the outward intervals of the hollow rotating rollers, and the pyrolysis furnace is the prior art and is not illustrated herein; the driving shaft is driven by the motor to rotate, so that the driving shaft can drive the hollow rotating roller to rotate, sludge falls on the hollow rotating roller, and the sludge centrifugally moves, hot air is injected into the air inlet box, the main source of the hot air is purified air exhausted by the pyrolysis furnace, the air in the air inlet box enters the housing through the air blowing hole, the air passing through the heating pipes is further heated, the air in the housing is blown upwards, the air in the housing can be blown upwards in an inclined way through the arrangement of the first inclined plates, the sludge (the sludge which moves centrifugally) passing through the position is dried, and the water molecules and the sludge can be better separated in the centrifugal process due to the light weight of the water molecules, simultaneously, the sludge can be scattered in the centrifugal movement process of the sludge, so that the sludge is more convenient to dry, the centrifugal movement of the sludge can be assisted, and finally the sludge falls into the drying assembly.

The hollow rotating roller 25 comprises a roller body 251, a plurality of first rotating shafts 252 which are distributed in an equidistant annular manner and are rotatably arranged on the roller body, a centrifugal plate 253 fixedly arranged on the first rotating shaft, an arc round rod 254 sleeved outside the first rotating shaft and fixedly arranged on the roller body, a connecting plate 255 with one end movably arranged on the arc round rod and the other end fixedly arranged on the first rotating shaft, a roller 256 rotatably arranged on the centrifugal plate, a plurality of fixing plates 257 arranged on the centrifugal plate from low to high at equal intervals, and a first spring 258 sleeved on the arc round rod and fixedly arranged on the roller body and the connecting plate at two ends respectively; a guide rail 221 is arranged on the housing 22, a first groove 222 and a second groove 223 are arranged on the guide rail, a top plate 224 which is located at the second groove and can be movably arranged on the guide rail is arranged on the top plate, an arc-shaped surface 225 is arranged on the top plate, two ends of a second spring 226 which is fixedly arranged on the guide rail and the top plate and is used for resetting the top plate is arranged on the guide rail and the top plate, and the roller is located on the guide rail to roll; the motor drives the roller body to rotate, so that the first rotating shafts revolve, the centrifugal plates on the first rotating shafts revolve, the rollers on the centrifugal plates roll along the guide rails, the first rotating shafts always generate torsion through the arrangement of the first springs, the rollers can roll along the first grooves and the second grooves when passing through the first grooves and the second grooves, the centrifugal plates rotate gradually in the revolution process, the centrifugal plates better perform centrifugal motion on sludge, the sludge falls between adjacent fixed plates through the arrangement of the fixed plates, the sludge is separated from the centrifugal plates after rotating for a certain distance along with the hollow rotating rollers, the centrifugal motion of the sludge is improved, and the fixed plates are arranged from top to bottom, so that the sludge can gradually fall between the adjacent fixed plates and the centrifugal motion of the sludge can be improved again; after the gyro wheel contacted the roof, can play the scram effect to the centrifugation board of revolution in-process to can accelerate the mud on the centrifugation board and break away from speed, to mud initial velocity increase, improve mud centrifugal motion once more, through the reaction force that the second spring can slow down the roof and receive, through the arcwall face setting, make the gyro wheel be located the guide rail once more, make whole linking better, more smooth and easy.

The feeding assembly 2 further comprises a first transmission roller 213 and a second transmission roller 214 which are rotatably arranged on the machine body, a first conveying belt 215 wound on the first transmission roller and the second transmission roller, a scraper 216 fixedly arranged on the housing, a first gear 217 fixedly sleeved on the first transmission roller, a second gear 218 which is meshed with the first gear and rotatably arranged on the base, an intermittent gear 219 fixedly sleeved on the driving shaft and meshed with the second gear, a third transmission roller 220 and a fourth transmission roller 227 rotatably arranged on the machine body, a second conveying belt 228 wound on the third transmission roller and the fourth transmission roller, a third gear 229 fixedly sleeved on the third transmission roller, a fourth gear 230 which is meshed with the third gear and rotatably arranged on the base, and a fifth gear 231 fixedly sleeved on the driving shaft and meshed with the fourth gear; the intermittent gear is also driven to rotate in the rotation process of the driving shaft, so that the second gear rotates intermittently, the first transmission roller rotates intermittently, and finally the first conveying belt operates intermittently, so that the sludge on the first conveying belt is conveyed and fed intermittently, namely the sludge is quantified; the driving shaft further drives a fifth gear to rotate, so that the fourth gear rotates, the third gear is meshed with the fourth gear, the third gear rotates, the third transmission roller rotates, the second conveying belt operates, a part of the sludge in the centrifugal motion process falls on the second conveying belt, and the sludge located in the position can be conveyed to the drying assembly through the second conveying belt.

The feeding assembly 2 further comprises a feeding hole 232 which is positioned above the first conveying belt and arranged on the machine body, a cover plate 233 which is positioned at the feeding hole and fixedly arranged on the machine body, a moving plate 234 which is movably arranged on the cover plate, a through groove 235 arranged on the moving plate, an air cylinder 236 which is fixedly arranged on the machine body and used for driving the moving plate to move, and a hopper 237 which is fixedly arranged on the cover plate; through cylinder drive movable plate reciprocating motion, logical groove on the movable plate and hopper coincidence back make the mud in the hopper fall into logical inslot, and the movable plate removes the in-process and can drive the mud that leads to the inslot and remove to the feed inlet direction, leads to groove and feed inlet coincidence back, makes the mud that leads to the inslot fall on first conveyer belt through the feed inlet, can seal feed inlet department through the aforesaid setting, also guarantees the sealed of this department promptly the mud material loading in-process, can realize simultaneously that the ration is reinforced.

The drying component 3 comprises a second partition plate 31 and a third partition plate 32 which are fixedly arranged on the machine body, a guide plate 33 which is fixedly arranged on the third partition plate, a plurality of convex parts 34 which are equidistantly arranged on the guide plate at intervals, a plurality of circular fixing columns 35 which are positioned between the second partition plate and the third partition plate and are equidistantly and fixedly arranged on the machine body, a plurality of gas pipes 36 which are positioned below the circular fixing columns and are fixedly arranged on the machine body at two ends, a fifth driving roller 37 and a sixth driving roller 38 which are rotatably arranged on the machine body, a third conveying belt 39 which is wound on the fifth driving roller and the sixth driving roller, a plurality of baffle plates 310 which are equidistantly and fixedly arranged on the third conveying belt, and a driving belt 311 which is wound on the fourth driving roller and the fifth driving roller; the plurality of round fixing columns are arranged in a staggered manner; the sludge in centrifugal motion is firstly beaten on the guide plate by the machine, the sludge can fall between the second partition plate and the third partition plate by refraction, water and the sludge can be separated again by the refraction, meanwhile, the direction of the sludge in the refraction is not fixed by the arrangement of a plurality of convex parts, the sludge is scattered again, the sludge in scattered materials is burnt and dried by the gas pipe, the falling speed of the sludge can be delayed and the falling track of the sludge can be changed by a plurality of circular fixed columns, the sludge is fully burnt and dried, the sludge burnt by the gas pipe falls on the third conveyer belt, when the second conveyer belt runs, the fourth driving roller rotates, when the fifth driving roller rotates by the arrangement, the third conveyer belt runs, the sludge on the third conveyer belt moves towards the pyrolysis furnace, and the arrangement of a plurality of baffle plates plays a good blocking role, the gas pipe incineration flue gas is located between the second partition plate and the third partition plate and flows upwards, and the upward flowing flue gas passes through the solid-gas separation assembly and is treated through the solid-gas separation assembly.

The solid-gas separation component 4 comprises a plurality of fourth partition plates 41 which are gradually increased from the third partition plates to the pyrolysis furnace and are fixedly arranged on the machine body at equal intervals, second inclined plates 42 which are fixedly arranged on the fourth partition plates and the guide plates, a plurality of through holes 43 which are arranged on the fourth partition plates at equal intervals, gas inlets 44 arranged on the pyrolysis furnace and gas outlets 45 arranged on the machine body; the through holes are obliquely arranged downwards, and the through holes on the adjacent fourth partition plates are arranged in a staggered manner; part of the flue gas passes through the fourth clapboards in sequence, and the flow direction of the flue gas is changed, so that the water vapor in the flue gas is better separated out, simultaneously blocking the solid in the flue gas to make the solid settle and fall on a third conveyer belt, enabling part of the flue gas to pass through the through holes by arranging a plurality of through holes on a fourth clapboard, wherein the through holes are arranged obliquely downwards to avoid the blockage of the through holes, meanwhile, the through holes on the adjacent fourth partition plates are arranged in a staggered mode, so that the effect of fixing solids is better, more solids in the flue gas fall on a third conveyer belt, water vapor and part of the flue gas are discharged from an exhaust port, the flue gas discharged from the exhaust port is further treated to remove the water vapor, the flue gas after the water vapor treatment enters a pyrolysis furnace to provide part of heat sources for the pyrolysis furnace, and the flue gas after the treatment of the plurality of fourth partition plates directly enters the pyrolysis furnace through an air inlet to provide part of heat sources for the pyrolysis furnace; the pyrolysis furnace can be used for exhausting air into the machine body through the air inlet, namely, the air in the machine body is sucked into the pyrolysis furnace.

The motor is commercially available.

Claims

1. The utility model provides a mud low temperature mummification coupling pyrolysis device which characterized in that: comprises a machine body (1), a feeding component (2) arranged on the machine body and used for feeding dewatered sludge, a drying component (3) positioned on one side of the feeding component and arranged in the machine body, a solid-gas separation component (4) positioned on one side of the drying component and arranged in the machine body, and a pyrolysis furnace (5) communicated with the machine body and fixedly arranged on the machine body; the material loading subassembly (2) includes first baffle (21), fixed housing (22) of locating on the first baffle, simultaneously fixed first ring (23) and second ring (24) of locating on housing and the organism, both ends rotate respectively and locate hollow commentaries on classics roller (25) on first ring and the second ring, fixed base (26) of locating on the organism, rotate and locate on the base and fixed driving shaft (27) of locating in the hollow commentaries on classics roller, fixed motor (28) that are used for driving shaft pivoted of locating on the base, fixed air inlet box (29) of locating on the housing lateral wall, locate on the housing be used for with air inlet box intercommunication blow hole (210), a plurality of heating pipes (211) of blow hole department are located to the equidistance interval, a plurality of first swash plates (212) that the outside interval grow gradually of hollow commentaries on classics roller set up.

2. The device for low-temperature drying and coupled pyrolysis of sludge according to claim 1, characterized in that: hollow commentaries on classics roller (25) include roll body (251), equidistance annular distribution just rotates a plurality of first pivot (252) of locating on the roll body, fixed centrifugal plate (253) of locating on the first pivot, the cover is located first pivot outside and fixed arc round bar (254) of locating on the roll body, one end is portable locates on the arc round bar and the other end is fixed locates connecting plate (255) on the first pivot, rotate gyro wheel (256) of locating on the centrifugal plate, locate a plurality of fixed plates (257) on the centrifugal plate by low to high and equidistance interval, the cover is located on the arc round bar and both ends are fixed respectively and are located first spring (258) on roll body and the connecting plate.

3. The device for low-temperature drying and coupled pyrolysis of sludge according to claim 1, characterized in that: be equipped with guide rail (221) on housing (22), be equipped with first recess (222) and second recess (223) on the guide rail, be located second groove department and movably locate roof (224) on the guide rail, be equipped with arcwall face (225) on the roof, both ends are fixed and are located second spring (226) that are used for the roof to reset on guide rail and the roof, the gyro wheel is located and rolls on the guide rail.

4. The device for low-temperature drying and coupled pyrolysis of sludge according to claim 1, characterized in that: the feeding assembly (2) also comprises a first transmission roller (213) and a second transmission roller (214) which are rotatably arranged on the machine body, a first conveying belt (215) wound on the first transmission roller and the second transmission roller, a scraper (216) fixedly arranged on the housing, a first gear (217) fixedly sleeved on the first transmission roller, a second gear (218) which is meshed with the first gear and rotatably arranged on the base, and an intermittent gear (219) fixedly sleeved on the driving shaft and meshed with the second gear, third driving roller (220) and fourth driving roller (227) on the organism are located in the rotation, around locating second transportation area (228) on third driving roller and fourth driving roller, third gear (229) on the third driving roller are located to fixed cover, set up and rotate fourth gear (230) of locating on the base with third gear engagement, fixed cover locate on the driving shaft and with fifth gear (231) of fourth gear engagement setting.

5. The device for low-temperature drying and coupled pyrolysis of sludge according to claim 1, characterized in that: the feeding assembly (2) further comprises a feeding hole (232) which is located above the first conveying belt and is arranged on the machine body, a cover plate (233) which is located at the feeding hole and is fixedly arranged on the machine body, a moving plate (234) which is movably arranged on the cover plate, a through groove (235) which is arranged on the moving plate, an air cylinder (236) which is fixedly arranged on the machine body and is used for driving the moving plate to move, and a hopper (237) which is fixedly arranged on the cover plate.

6. The device for low-temperature drying and coupled pyrolysis of sludge according to claim 1, characterized in that: the drying component (3) comprises a second partition plate (31) and a third partition plate (32) which are fixedly arranged on the machine body, a guide plate (33) which is fixedly arranged on the third partition plate, a plurality of convex parts (34) which are equidistantly arranged on the guide plate at intervals, a plurality of round fixing columns (35) which are positioned between the second partition plate and the third partition plate and are fixedly arranged on the machine body at equidistant intervals, a plurality of gas pipes (36) which are positioned below the round fixing columns and are fixedly arranged on the machine body at two ends, a fifth driving roller (37) and a sixth driving roller (38) which are rotatably arranged on the machine body, a third conveying belt (39) which is wound on the fifth driving roller and the sixth driving roller, a plurality of baffle plates (310) which are fixedly arranged on the third conveying belt at equidistant intervals, and a driving belt (311) which is wound on the fourth driving roller and the fifth driving roller; a plurality of circular fixed columns are arranged in a staggered mode.

7. The device for low-temperature drying and coupled pyrolysis of sludge according to claim 1, characterized in that: the solid-gas separation assembly (4) comprises a plurality of fourth partition plates (41) which are gradually increased from the third partition plates to the pyrolysis furnace and are fixedly arranged on the machine body at equal intervals, second inclined plates (42) which are fixedly arranged on the fourth partition plates and the guide plates, a plurality of through holes (43) which are arranged on the fourth partition plates at equal intervals, gas inlets (44) arranged on the pyrolysis furnace and gas outlets (45) arranged on the machine body; the through holes are obliquely and downwards arranged, and the through holes on the adjacent fourth partition plates are arranged in a staggered mode.