CN112080305A

CN112080305A - Preparation method of special rotary rake roller for waste tire pyrolysis reaction furnace

Info

Publication number: CN112080305A
Application number: CN202011068255.3A
Authority: CN
Inventors: 杨松
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-08
Filing date: 2020-10-08
Publication date: 2020-12-15
Anticipated expiration: 2040-10-08
Also published as: CN112080305B

Abstract

The invention relates to the technical field of environmental protection, in particular to a preparation method of a special rotary rake roller for a waste tire pyrolysis reaction furnace. The method is characterized in that: after the rotary rake roller body is completely rolled, the rake nails are arranged according to a similar spiral line and are fixed on the outer surface of the rotary rake roller body one by one according to the requirements of section included angles, then the spiral blades are welded and fixed on the tubular shaft, the whole rotary rake roller body is assembled with the cross-shaped support frame and sent into the rotary rake roller body rolling barrel, in order to prevent the barrel from local deformation due to welding, the cross-shaped support frame is fixed in the rotary rake roller body by adopting spot welding positioning back section welding, finally, the two ends of the rotary rake roller body are plugged by using end sockets, the air inlet shaft head and the air exhaust shaft head are connected with the rotary rake roller body and then tempered, and then the barrel of the rotary rake roller body is used as a processing reference, a ground lathe is used for processing bearing positions of the air inlet shaft head and the air exhaust shaft head.

Description

Preparation method of special rotary rake roller for waste tire pyrolysis reaction furnace

Technical Field

The invention relates to the technical field of environmental protection, in particular to a preparation method of a special rotary rake roller for a waste tire pyrolysis reaction furnace.

Background

Waste tires are common solid waste pollutants, people recycle the waste tires through a plurality of ways to realize harmless treatment, and the preparation of fuel oil and carbon black through the pyrolysis of the waste tires is one of the solutions. The invention discloses a Chinese patent (patent application number is 02112328.4, the patent name is a vertical cracking tower for cracking and recovering industrial carbon black and fuel oil from waste tires), which is characterized in that the invention is provided with a closed vertical tower body, the upper end of the tower body is provided with an upper scraping stirring device, a tire feed inlet and a cracking gas outlet, the tower body is internally provided with an upper hollow heating disc and a lower hollow cooling disc in sequence, and the upper hollow heating disc and the lower hollow cooling disc are respectively communicated with a flue gas distribution system and a cooling water inlet and outlet header outside the tower body, and the tower body is provided with a lower scraping stirring device and a tower bottom carbon black outlet. The cracking tower has the advantages of high operation flexibility, good cracking performance, continuous and reliable operation and low labor intensity, and is thermal cracking equipment with good performance. The main characteristics are as follows: 1) the energy consumption is low; 2) the regulation and control are convenient, and the adaptability is strong; 3) the operation is closed, no impurities enter, no cracking gas leaks, and the quality and the safety are ensured; 4) the equipment is light in weight, adopts a vertical structure and occupies small area; 5) the operation is stable and the operation is convenient. The invention Chinese patent (patent application number is 201610787571.3, the patent name is junked tire thermal cracking device) discloses a junked tire thermal cracking device, which comprises a junked tire crushing device, a thermal cracking furnace, an oil gas recovery system, a smoke discharge system and a solid material recovery system, wherein the thermal cracking furnace is provided with a furnace body, a vertically arranged hearth is arranged in the furnace body, a heat preservation shell is arranged outside the furnace body, the upper part of the furnace body is provided with a feed inlet, a smoke discharge port and an oil gas outlet, and the lower part of the furnace body is provided with a solid material discharge port connected with the solid material recovery system; the smoke discharge port is connected with a smoke discharge system through a smoke discharge pipe, and the oil gas outlet is connected with an oil gas recovery system through an oil gas discharge pipe; a closed hearth body is arranged in the hearth, an inner feed pipe connected with the feed inlet and an inner oil gas pipe connected with the oil gas outlet are arranged at the upper end of the hearth body, a smoke passing chamber is arranged between the inner wall of the hearth and the hearth body, a smoke discharge port is communicated with the smoke passing chamber, and an inner discharge pipe connected with a solid material discharge port is arranged at the lower end of the furnace body; the lower part of the furnace body is provided with a combustion chamber communicated with the smoke passing chamber; the central part of the furnace bed body is provided with a rotary mandrel, a plurality of layers of material chambers are arranged in the furnace bed body from top to bottom, the rotary mandrel is provided with a stir-frying device extending into each material chamber, a furnace section is arranged between adjacent material chambers and comprises a middle shaft tube, an upper annular plate and a lower annular plate, the inner edges of the upper annular plate and the lower annular plate are butted with the upper edge and the lower edge of the middle shaft tube, the outer edges of the upper annular plate and the lower annular plate are butted with the wall of the furnace bed body, a middle annular clapboard is arranged between the upper annular plate and the lower annular plate, the outer ring surface of the middle annular clapboard is connected with the inner wall of the furnace chamber, an upper smoke outlet window is arranged between the outer edge of the upper annular plate and the middle annular clapboard, a lower smoke inlet window is arranged between the outer edge of the lower annular plate and the middle annular clapboard, a smoke passage is arranged between the inner ring surface of the middle annular clapboard and the, the furnace section of the blanking channel arranged between the middle shaft tube and the rotary mandrel is an inner blanking-shaped furnace section; the furnace section of the blanking channel, which is arranged between the upper and lower annular disc sheets close to the outer edge, is an outer blanking-shaped furnace section, the inner blanking-shaped furnace section and the outer blanking-shaped furnace section are arranged at intervals, the stir-frying device comprises a plurality of stir-frying sheet arms fixed with the rotating mandrel, and stir-frying sheets which are arranged towards the blanking channel are arranged along the lower surfaces of the stir-frying sheet arms; the solid material recovery system is provided with a jacket type spiral cooling conveyor, the jacket type spiral cooling conveyor comprises a shell with a water-cooled jacket, a spiral conveying mechanism is arranged in the shell, a feed inlet of the shell is butted with a solid material discharge port of a thermal cracking furnace body, a double-roll crusher is arranged at a discharge port of the shell, a rubber conveying belt is arranged below the discharge port of the shell, a magnet is arranged at the lower part of the rubber conveying belt, and a steel wire receiving hopper is arranged at the discharge end of the rubber conveying belt; and a carbon suction draught fan is arranged above the rubber conveyer belt, a carbon suction nozzle of the carbon suction draught fan is arranged right opposite to the rubber conveyer belt, and an exhaust pipe of the carbon suction draught fan is connected with a dust removal system.

The vertical cracking tower for cracking and recovering industrial carbon black and fuel oil from waste tires in the prior art provides a solution for preparing fuel oil and continuously producing carbon black by cracking the waste tires, the vertical cracking tower designs a multi-stage tower tray (hollow disc) by referring to the working principle of a plate tower, but the plate tower is suitable for gas-liquid two-phase fluid and is not suitable for waste tire rubber blocks, and the rubber blocks containing steel wires are adopted in the vertical cracking tower, the reason is simple, the rubber blocks in the cracking state are thick jelly, a channel for fluid flowing in the hollow disc is blocked, so that the cracking reaction process is stopped, and agglomerated steel wires are sunk into rake blades and the disc except for blocking a flowing channel, so that a stirring shaft is locked; the reaction kettle working principle of the two waste tire thermal cracking devices in the prior art is similar to that of an external heating sleeve and a built-in stirrer, a smoke passing chamber between the inner wall of a hearth and a hearth body heats the hearth body through high-temperature smoke, waste tire rubber blocks are fried and mixed through a rotary mandrel and a frying piece arm, and in order to increase the heat exchange area, smoke passing channels are designed for an upper annular disc and a lower annular disc to pass through the high-temperature smoke.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a preparation method of a special rotary harrow roller for a waste tire pyrolysis reaction furnace, which is characterized by comprising the following steps:

step one, the rotary rake roller body, the air inlet shaft head and the air outlet shaft head are all made of Q345R steel in a rolling mode, and the rotary rake roller body, the air inlet shaft head and the air outlet shaft head are made of steel in a rolling mode and then reach the level II welding seam standard.

And secondly, welding and fixing the helical blades on the tubular shaft, assembling the whole body and the cross-shaped support frame and sending the assembled body into the rotary rake roller body coiling barrel, welding and fixing the cross-shaped support frame in the rotary rake roller body by adopting spot welding positioning rear sections in order to prevent the barrel body from being locally deformed due to welding, and finally plugging two ends of the rotary rake roller body by using end sockets.

And thirdly, embedding heat insulation tiles in the cylinder body coiled by the air inlet shaft head and the air exhaust shaft head, fixing a spiral coil pipe outside, welding an outer cover plate of the steam-water mixing chamber, performing a water pressure test after the corrugated plates are installed, and ensuring that the labyrinth cooling tank has no leakage phenomenon under the pressure of 1.0 MPa.

And fourthly, connecting the air inlet shaft head and the air exhaust shaft head with the rotary harrow roller body, tempering, and then using the cylinder body of the rotary harrow roller body as a processing reference, and using a floor lathe to machine the bearing positions of the air inlet shaft head and the air exhaust shaft head, thereby ensuring the coaxiality of the rotary harrow roller body, the air inlet shaft head and the air exhaust shaft head.

And step five, finally, fixing the braks on the outer surface of the rotary harrow roller body one by one, wherein the braks meet the requirement of spiral line arrangement on the outer surface of the rotary harrow roller body, and adjusting included angles between the braks and the section of the rotary harrow roller body, the included angles of the braks in the number of the microspheres are 9-16 degrees, the directions are inclined upwards, the included angles of the braks in the number of ¼ degrees are 9-20 degrees, and the directions are inclined downwards.

The inventor finds that the tire consists of an outer tire, an inner tire and a cushion belt, the outer tire consists of three main parts, namely a tire body, a tire tread and a tire bead, the tire body is formed by attaching a plurality of layers of rubberized cord fabrics according to a certain angle, and the cord fabrics are usually made of high-strength steel wires and synthetic fiber rubberized fabrics; the tread contacts with the ground and is made of heat-resistant and shear-resistant rubber materials; the tyre bead is used for tightly fixing the tyre on a wheel rim, and mainly comprises a steel wire ring, triangular filling rubber and steel wire ring wrapping cloth. The pneumatic tire can be classified into a car tire, a truck tire, an agricultural tire, an engineering tire, a special vehicle tire, an aircraft tire, a motorcycle tire and a bicycle tire according to the application of the pneumatic tire, and the recycled waste tire is generally a car tire, a truck tire, an agricultural tire, a motorcycle tire and a bicycle tire, and the structure of the waste tire is generally an oblique tire and a radial tire. The recovered waste tires are used for building fillers, highway fillers, regenerated rubber preparation, fuel oil and carbon black preparation by pyrolysis and the like.

The inventor finds that the process for preparing fuel oil and carbon black by pyrolyzing waste tires requires the processes to be carried out in a vacuum, inert gas protection and anaerobic closed environment, and the process is currently put into industrial production methods such as reaction kettle pyrolysis, rotary reaction furnace pyrolysis, vertical tower pyrolysis and the like. Although the pyrolysis method of the reaction kettle has the advantage that the whole material is fed without being crushed, the pyrolysis method has high energy consumption and low finished product yield and is difficult to popularize due to the reason that continuous production cannot be realized; the rotary reaction furnace pyrolysis method is difficult to popularize due to the reasons that feeding and discharging are difficult, pollutants are easy to leak through high-temperature dynamic sealing and the like; the vertical tower pyrolysis method has the advantages from the thermodynamic point of view undoubtedly compared with the first two methods, the power of the material from top to bottom is provided by gravity, the hot air completes heat exchange with the material from bottom to top, the feeding and discharging and the heat exchange are easy to implement, the vertical tower is static equipment, and the high-temperature sealing problem is easy to solve, but the technical problem that a discharge channel is blocked by a rubber jelly and a steel wire ball which are reformed after long chain breakage of rubber exists in the pyrolysis process of the waste tires, the surface of the waste tires is further pyrolyzed to generate pyrolytic carbon crust and the interior of the waste tires is prevented from being pyrolyzed continuously, and the technical problem that the pyrolysis efficiency is low due to the low thermal conductivity of the waste.

The inventor finds, to above-mentioned technological problem, this application has designed gyration harrow roller, gyration harrow roller includes gyration harrow roll body, the axle head that admits air, exhaust axle head, and the axle head that admits air designs respectively at the lower extreme and the upper end of gyration harrow roll body with the exhaust axle head, and gyration harrow roll body, the axle head that admits air, exhaust axle head revolve around same center pin. The utility model discloses a steam-water mixing chamber, including the axle head of admitting air, exhaust spindle head hole, the heat insulation tile, labyrinth cooling groove, bearing position are outwards designed in proper order to 450 ~ 500 ℃ high temperature flue gas, follow the hole, labyrinth cooling groove includes spiral coil, soda mixing chamber, buckled plate, and spiral coil fixes at soda mixing chamber inner wall, and the cooling water gets into the vaporization of soda mixing chamber thermal evaporation from spiral coil, and the bubble striking spiral coil that the boiling produced, buckled plate break rapidly for more tiny bubble to make the bubble evenly distributed in the cooling water, in other words just avoid steam coefficient of heat conductivity to differ greatly to lead to the local overheat of locular wall metal to produce the creep. The outer surface of the rotary rake roller body is spirally distributed with rake nails, the rake nails in quantity are rotated to apply downward thrust to the rubber block along with the rotary rake roller body by adjusting the included angle between the rake nails and the section of the rotary rake roller body, the rake nails in quantity of ¼ are rotated to apply upward thrust to the rubber block along with the rotary rake roller body, the rake nails apply downward thrust to the rubber block to help the asphalt jelly and the steel wire to be smoothly discharged, the resultant force of the two rake nails forms a twisting and cutting effect on the rubber block, the pyrolytic carbon hard shell is twisted and broken to enable the rubber block to be continuously pyrolyzed, meanwhile, a rubber block accumulation layer is stirred to form a gap, pyrolytic oil gas can escape from the gap of the accumulation layer, the pyrolytic oil gas is in mass transfer and heat transfer with the rubber block in the upward flowing process, and the gas-liquid-solid mass transfer and heat transfer efficiency far exceeds the gas-solid transfer. The cross support frame is installed at both ends in the rotary harrow roller body, and the cross support frame is fixed with helical blade through the hollow shaft, and high temperature flue gas rises along the passageway spiral that helical blade formed, and even heating rotary harrow roller body avoids the unable problem that causes the swell of circulation harrow roller body dead angle of flowing through of high temperature flue gas.

The inventor finds that the rotary rake roller body, the air inlet shaft head and the air outlet shaft head are all made of Q345R steel, and the rotary rake roller body, the air inlet shaft head and the air outlet shaft head respectively achieve the level II welding seam standard after being made; the spiral blades are welded and fixed on the pipe shaft, the whole body and the cross-shaped support frame are assembled and sent into the rotary rake roller body to be rolled into the barrel body, in order to prevent the barrel body from being locally deformed due to welding, the cross-shaped support frame is fixed in the rotary rake roller body by adopting spot welding positioning and back section welding, and finally, the two ends of the rotary rake roller body are blocked by using end sockets; the air inlet shaft head and the air exhaust shaft head are coiled into the barrel, the heat insulation tile is embedded in the barrel, the spiral coil pipe is fixed outside the barrel, then an outer cover plate of the steam-water mixing chamber is welded, a water pressure test is carried out after the corrugated plates are installed, and the labyrinth cooling tank is guaranteed to have no leakage under the pressure of 1.0 MPa. Connecting the air inlet shaft head and the air exhaust shaft head with the rotary harrow roller body, tempering, and then using the cylinder body of the rotary harrow roller body as a processing reference, and lathing the bearing positions of the air inlet shaft head and the air exhaust shaft head by using a floor lathe so as to ensure the coaxiality of the rotary harrow roller body, the air inlet shaft head and the air exhaust shaft head; and finally, fixing the braks on the outer surface of the rotary harrow roller body one by one, wherein the braks are arranged on the outer surface of the rotary harrow roller body according to the spiral line-like arrangement requirement, and adjusting the included angles between the braks and the section of the rotary harrow roller body, the included angles of the braks in the number of microspheres are 9-16 degrees, the directions of the braks are inclined upwards, the included angles of the braks in the number of ¼ are 9-20 degrees, and the directions of the braks are inclined downwards.

Compared with the prior art, the invention at least has the following advantages: firstly, arranging rake nails on the outer surface of a rotary rake roller body in a spiral line manner, applying downward thrust to a rubber block by adjusting an included angle between the rake nails and the section of the rotary rake roller body, applying upward thrust to the rubber block by the rake nails in the amount of ¼ along with the rotation of the rotary rake roller body, applying downward thrust to the rubber block by the rake nails to help the asphalt jelly and a steel wire cluster to be smoothly discharged, forming a twisting action on the rubber block by the resultant force of two kinds of rake nails, twisting a pyrolytic carbon hard shell to continuously pyrolyze the rubber block, stirring a rubber block accumulation layer to form a gap, allowing pyrolytic oil gas to escape from the gap of the accumulation layer, and transferring heat with the rubber block in the process of upward flowing of the pyrolytic oil gas, wherein the gas-liquid-solid heat transfer efficiency is far higher than that of the rotary rake roller body and the rubber block solid heat transfer efficiency; secondly, the cross support frame is installed at both ends in the gyration harrow roller body, and the cross support frame passes through the hollow shaft and fixes helical blade, and the high temperature flue gas rises along the passageway spiral that helical blade formed, and even heating gyration harrow roller body avoids the unable problem that causes the swell of circulation harrow roller body dead angle of flowing through of high temperature flue gas.

Drawings

Fig. 1 is a schematic structural view of a main view of a method for manufacturing a rotary harrow roll special for a waste tire pyrolysis reaction furnace according to the present invention.

Fig. 2 is a schematic structural diagram of a large sample A of the preparation method of the special rotary rake roller for the waste tire pyrolysis reaction furnace.

Fig. 3 is a schematic diagram of a partially enlarged structure B of the method for preparing the special rotary rake roll for the waste tire pyrolysis reaction furnace of the present invention.

1-rotary harrow roller body 2-air inlet shaft head 3-exhaust shaft head 4-heat insulation tile 5-bearing position

6-labyrinth cooling groove 7-spiral coil 8-steam-water mixing chamber 9-corrugated plate

10-harrow nails 11-pipe shaft 12-helical blades 13-cross support frame.

Detailed Description

The invention is further described with reference to the following detailed description of embodiments and drawings.

As shown in fig. 1, 2 and 3, the preparation method of the special rotary harrow roller for the waste tire pyrolysis reaction furnace is characterized in that:

step one, the rotary harrow roller body 1, the air inlet shaft head 2 and the exhaust shaft head 3 are all rolled by Q345R steel, and the rotary harrow roller body 1, the air inlet shaft head 2 and the exhaust shaft head 3 are respectively rolled to reach the standard of a II-level welding seam.

And step two, welding and fixing the helical blades 12 on the tubular shaft 11, integrally assembling the helical blades and the cross support frame 13, conveying the helical blades and the cross support frame into the rotary rake roller body 1 to be rolled, welding and fixing the cross support frame 13 in the rotary rake roller body 1 by adopting spot welding positioning rear sections in order to prevent the barrel from locally deforming due to welding, and finally plugging two ends of the rotary rake roller body 1 by using end sockets.

Thirdly, rolling the air inlet shaft head 2 and the air outlet shaft head 3 to form a cylinder body, embedding a heat insulation tile 4 and fixing a spiral coil pipe 7 outside, then welding an outer cover plate of the steam-water mixing chamber 8, performing a water pressure test after the corrugated plate 9 is installed, and ensuring that the labyrinth cooling tank 6 has no leakage phenomenon under the pressure of 1.0 MPa.

And fourthly, connecting the air inlet shaft head 2 and the air exhaust shaft head 3 with the rotary harrow roller body 1, tempering, and then using the cylinder body of the rotary harrow roller body 1 as a processing reference, and lathing the bearing positions of the air inlet shaft head 2 and the air exhaust shaft head 3 by using a floor lathe, thereby ensuring the coaxiality of the rotary harrow roller body 1, the air inlet shaft head 2 and the air exhaust shaft head 3.

And step five, finally, fixing the braks 10 on the outer surface of the cylinder body of the rotary harrow roller body 1 one by one, wherein the braks 10 meet the requirement of similar spiral line arrangement on the outer surface of the rotary harrow roller body 1, and adjusting the included angles of the braks 10 and the section of the rotary harrow roller body 1, the included angles of the braks 10 in the number of the microspheres are 9-16 degrees, the direction is inclined upwards, the included angles of the braks 10 in the number of ¼ are 9-20 degrees, and the direction is inclined downwards.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The preparation method of the special rotary harrow roller for the waste tire pyrolysis reaction furnace is characterized by comprising the following steps of: step one, a rotary rake roller body, an air inlet shaft head and an air outlet shaft head are all made of Q345R steel in a rolling mode, and the rotary rake roller body, the air inlet shaft head and the air outlet shaft head are made of steel in a rolling mode and then reach the level II welding seam standard; after the rotary harrow roller body barrel is rolled, fixing harrow nails on the outer surface of the rotary harrow roller body barrel one by one according to the requirements of similar spiral line arrangement and section included angles, then welding and fixing spiral blades on a pipe shaft, integrally assembling with a cross-shaped support frame and sending into the rotary harrow roller body rolling barrel, in order to prevent the barrel from local deformation due to welding, the cross-shaped support frame is fixed in the rotary harrow roller body by adopting spot welding positioning and back section welding, and finally plugging two ends of the rotary harrow roller body by using end sockets; thirdly, embedding heat insulation tiles in the cylinder body coiled by the air inlet shaft head and the air exhaust shaft head, fixing a spiral coil pipe outside, welding an outer cover plate of the steam-water mixing chamber, performing a water pressure test after the corrugated plates are installed, and ensuring that the labyrinth cooling tank has no leakage phenomenon under the pressure of 1.0 MPa; and fourthly, connecting the air inlet shaft head and the air exhaust shaft head with the rotary harrow roller body, tempering, and then using the cylinder body of the rotary harrow roller body as a processing reference, and using a floor lathe to machine the bearing positions of the air inlet shaft head and the air exhaust shaft head, thereby ensuring the coaxiality of the rotary harrow roller body, the air inlet shaft head and the air exhaust shaft head.