CN112080308A

CN112080308A - Operation method of waste tire pyrolysis reaction furnace feeding system

Info

Publication number: CN112080308A
Application number: CN202011068264.2A
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

Abstract

The invention relates to the technical field of environmental protection, in particular to an operation method of a feeding system of a waste tire pyrolysis reaction furnace. The method is characterized in that: the rotary ball assembly is connected with the middle bell jar through a hanging chain, the middle bell jar is controlled to move downwards, the rubber blocks are driven by gravity to fall into the tail section hopper body, the rotary ball assembly acts immediately when the accumulation amount of the rubber blocks reaches the volume of the microspheres of the tail section hopper body, the middle bell jar moves upwards to be matched and tightly attached with the middle bell jar seat to form a sealing surface, the multistage steam ejector assembly is started, steam fluid works, the steam is thermally insulated in the spray pipe, the flow rate of the steam is increased and the pressure is reduced at the outlet of the spray pipe, inert tail gas in the gap of the rubber blocks of the tail section hopper body is drained and extracted, the multistage steam ejector assembly stops working after the vacuum degree is controlled to be 1000-1300 Pa, the pull rod assembly is connected with the lower bell jar through a hanging wire, the lower bell jar is controlled to move downwards, the rubber blocks are driven by gravity to fall into the vertical pyrolysis tower body, and.

Description

Operation method of waste tire pyrolysis reaction furnace feeding system

Technical Field

The invention relates to the technical field of environmental protection, in particular to an operation method of a feeding system of 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, wherein the method for preparing fuel oil and carbon black through pyrolysis of the waste tires is one of the solutions, and the process conditions for preparing the fuel oil and the carbon black through pyrolysis of the waste tires are completed in an anoxic or vacuum environment. The invention Chinese patent (patent application No. 201822203253.5, the patent name is a hydraulic automatic feeder for tire cracking equipment) discloses a hydraulic automatic feeder for tire cracking equipment, which is characterized in that a support wheel (2) is arranged at the bottom of a frame (1), a hydraulic oil cylinder support frame (4) is fixed at the left end of the top of the frame (1), a feeder outer cylinder (3) is fixed at the right end of the top of the frame (1), an observation platform (9) is fixed at the left end of the top of the feeder outer cylinder (3), a feeding port (5) is arranged at the right end of the top of the feeder outer cylinder (3), a feeding hopper (8) is arranged at the feeding port (5), a discharging port (6) is arranged on the right end face of the feeder outer cylinder (3), a flange (7) is fixedly sleeved outside the right end of the feeder outer cylinder (3), an inner cylinder (10) is arranged inside the feeder outer cylinder (3, the bottom of inner tube (10) and guide rail (11) sliding connection, guide rail (11) are fixed on the inside bottom surface of feeder urceolus (3), the inside of inner tube (10) is provided with hydraulic cylinder (12), the front end and the fixed front bezel (13) fixed connection of hydro-cylinder (12), the fixed front bezel (13) of hydro-cylinder is fixed on the right-hand member face of inner tube (10), the rear end and the fixed rear bezel (14) fixed connection of hydro-cylinder (12), the fixed rear bezel (14) of hydro-cylinder is fixed on hydraulic cylinder support frame (4). The Chinese invention patent (patent application number 201310683103.8, the name of which is a scrap tire cracking feeding process and equipment) discloses a scrap tire cracking feeding process and equipment, which are characterized in that: the waste tires are automatically conveyed into a cracking bin by the whole tire in a sealed state; the equipment comprises a fixed barrel-shaped shell (2), an inner barrel (3) is arranged in the shell (2), a rotating shaft (8) is arranged at the center of the inner barrel (3), the barrel wall of the inner barrel is connected with the rotating shaft (8) through spokes (6), at least one opening (4) is arranged on the barrel wall of the inner barrel, a storage bin (10) is connected in the inner barrel at the inner side of each opening (4), and a window I (5) and a window II (9) corresponding to the openings (4) of the inner barrel are respectively arranged on the barrel walls at the left side and the right side of the shell (2); the shell (2) is of a double-layer structure; the rotating shaft (8) is a hollow rotating shaft with one closed end, a partition plate (19) with the same length as the rotating shaft (8) is arranged in the center of the rotating shaft (8), an air inlet pipeline (20) is arranged above the partition plate (19) and connected with an air supply pipe (21), an air outlet pipeline (22) is arranged below the partition plate (19) and connected with an air receiving pipe (23), and the air supply pipe (21) and the air receiving pipe (23) are both connected to the storage bin (10); the inner cylinder (3) is internally provided with a sealing heat-conducting filler; the air receiving pipe (23) is connected with the feed inlet end of the storage bin (10), and the air supply pipe (21) is connected with the closed end of the storage bin (10); the storage bin (10) is obliquely and downwards arranged in the inner cylinder body and is fixedly connected with the inner cylinder body.

In the first prior art, the supporting wheels, the flanges, the observation platform and the hydraulic oil cylinder are arranged, so that the problems of slow feeding and difficult feeding of the traditional tire cracking equipment are solved, the waste tires are fed into the pyrolysis furnace by the hydraulic oil cylinder, the automatic feeding is realized, but the problem of how to isolate air in the feeding process is not solved, and therefore, the oxidation reaction in the pyrolysis process of the waste tires is avoided, and the yield of the pyrolysis oil is reduced and the asphaltene component of the pyrolysis oil is increased; the barrel center is provided with the pivot in prior art two, the whole child continuous feed schizolysis of junked tire has been realized, be provided with sealed heat conduction filler in the interior barrel, the purpose is solved the problem at the isolated air of in-process of feeding, the feeding of this kind of similar rotary drum is not reliable with sealed mode, the reason is that the sealed face of the movive seal of rotary drum can warp under high temperature, sealed filler does not possess the compensation function, still there is the possibility of leaking, can seriously warp after the junked tire damage again, extremely irregular junked tire fills the rotary drum and will lead to the rotary drum card to die.

Disclosure of Invention

In view of the above problems, the present invention provides a method for operating a feeding system of a pyrolysis reactor for waste tires, which comprises the following steps:

the method comprises the steps that firstly, waste tires are crushed into rubber blocks with the size of 3-4 cm, the rubber blocks are weighed by a self-weighing trolley and then are conveyed to a three-section bell jar feeding mechanism along a lifting track under the drive of a pulley traction assembly, the rubber blocks of the waste tires conveyed by a bucket lifting trolley mechanism are stacked in a first-section bell jar storage bin, the stacking amount accounts for the volume of a first-section hopper body, the first-section bell jar storage bin and a last-section bell jar storage bin are both in a sealed state, inert tail gas is output from a tail gas recovery buffer tank and enters the first-section hopper body through an outer annular air passage of an inner partition bin assembly and an outer partition bin assembly to be swept, air in the first-section bell jar storage bin is extruded and discharged, the multistage steam ejector assembly comprises a first-stage ejector, a second-stage ejector, a third-stage ejector, a middle condenser and a last-stage ejector, and the vacuum degree.

And secondly, connecting the pin shaft assembly with an upper bell jar through a suspender, controlling the upper bell jar to move downwards, separating the upper bell jar from an upper bell jar seat, driving a rubber block to fall into a middle hopper body under the action of gravity, immediately actuating the pin shaft assembly when the accumulation amount of the rubber block reaches the microspheres volume of the middle hopper body, upwards moving the upper bell jar to be matched and tightly attached with the upper bell jar seat to form a sealing surface, outputting inert tail gas from a tail gas recovery buffer tank, entering the middle hopper body through an outer annular air passage of an inner compartment assembly and an outer compartment assembly to purge for 30-40 s, extruding and discharging air in the gap of the rubber block, and enabling the middle hopper body to be in a sealing state again after the inert tail gas purging is stopped, wherein the inert tail gas is the exhaust gas after the high-temperature flue gas output by a pyrolysis gas combustion kiln is recycled and subjected to heat exchange through a vertical pyrolysis tower body and a rotary.

And thirdly, the rotary ball assembly is connected with the middle bell jar through a hanging chain, the middle bell jar is controlled to move downwards, the rubber blocks are driven by gravity to fall into the tail section hopper body, the rotary ball assembly acts immediately when the accumulation amount of the rubber blocks reaches the volume of the tail section hopper body, the middle bell jar moves upwards to be matched and attached with the middle bell jar seat to form a sealing surface, the multi-stage steam ejector assembly is started, steam works in a steam fluid mode, the steam is thermally insulated in the spray pipe, the flow rate of the steam is increased and the pressure is reduced at the outlet of the spray pipe, the inert tail gas in the gap of the rubber blocks of the tail section hopper body is drained and separated, the multi-stage steam ejector assembly stops working after the vacuum degree is controlled to be 1000-1300 Pa, the pull rod assembly is connected with the lower bell jar through a hanging wire to control the lower bell jar to move downwards, the rubber blocks are driven by gravity to fall into the vertical pyrolysis.

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 that pyrolysis of waste tires mainly aims at recycling pyrolysis oil and pyrolysis carbon to further prepare products such as fuel oil and carbon black, and the pyrolysis gas is uneconomical if being used as a main product because the yield of the pyrolysis gas is improved and a higher pyrolysis temperature (550-600 ℃) is needed to break pyrolysis oil chain hydrocarbon with a larger molecular weight to generate pyrolysis gas mainly containing components such as methane, ethane, ethylene and propylene with a smaller molecular weight, and the higher pyrolysis temperature causes a part of energy to be wasted on broken molecular chains, so that the pyrolysis gas generated by degrading the pyrolysis oil is flammable and explosive and is difficult to burn and explodeStoring and transporting; in order to reduce the manufacturing cost of the pyrolysis reaction furnace and meet the requirements of mechanical processing, Q345R steel is selected as a furnace body material, the allowable stress requirement of the Q345R steel at high temperature is considered, namely the steel is used at the temperature of not more than 475 ℃, the comprehensive consideration of the factors is taken, the pyrolysis process temperature of the waste tires is designed to be 350-400 ℃, the heat source for pyrolyzing the waste tires is high-temperature flue gas generated by recycling pyrolysis gas, the pyrolysis gas is non-condensable combustible gas after pyrolysis oil is condensed at normal temperature, and the low-grade heat value is 17-54 MJ/Nm³. Due to the requirements of heat transfer efficiency and heat transfer temperature difference, the temperature of flue gas from the outlet of the waste tire pyrolysis gas combustion kiln to the jacket of the vertical pyrolysis tower body and the inlet of the rotary rake roller is controlled to be 550-560 ℃, the temperature of flue gas after heat exchange of the vertical pyrolysis tower body and the rotary rake roller is 410-420 ℃, and the average temperature difference of heat transfer is 140 ℃, so that the pyrolysis gas combustion kiln can regulate and control the temperature of high-temperature flue gas generated by pyrolysis gas combustion, a cold source is required to be introduced to be mixed with the high-temperature flue gas, and the temperature required by a pyrolysis process is achieved by regulating the component ratio of.

The inventor finds that in the waste tire pyrolysis process, the requirements of material balance, water (steam) balance and energy balance and the total targets of saving energy, reducing emission and recycling, the oxygen content of the exhaust gas after the high-temperature flue gas output by the pyrolysis gas combustion kiln is subjected to heat exchange through the vertical pyrolysis tower body and the rotary rake roller is reduced to be less than 3%, the temperature is 410-420 ℃, the pressure bearing of the rotary rake roller under the dynamic seal high-temperature working condition is limited, and the designed absolute pressure is not more than 105kPa, so that the pressure index of the exhaust gas is lower than the pressure requirements of a secondary air inlet of a combustor and a cold source at an inlet of the pyrolysis gas combustion kiln of 112-118 kPa, and the exhaust gas cannot be directly recycled. According to the operating principle of turbocharging, considering that the pressure of the discharged waste gas is low, selecting an axial air inlet and vertical upward exhaust mode with small pressure loss at the air inlet end, and using a cantilever type rotor structure, the discharged waste gas is expanded through a static blade grid and a movable blade wheel to do work, the heat energy is converted into mechanical energy for rotating the movable blade wheel, the movable blade wheel drives a planetary speed increaser to drive the air turbine, the air turbine pumps the air to pressurize and enter a combustor, a blower required by premixed air conveyed by the combustor is replaced, but the absolute pressure of an inlet of the discharged waste gas is 105kPa, an outlet of the discharged waste gas is directly communicated with a chimney, namely, the backpressure of a waste gas turbine is 101 kPa, the pressure difference of the inlet and the outlet is not enough to overcome the pressure loss of a flow passage of the static blade grid and the movable blade wheel to cause the rotation, the outlet pressure of the discharged waste gas is reduced to 50-55 kPa, the pressure difference between the inlet and the outlet of the waste gas turbine reaches 52-57 kPa, and the movable impeller can work reliably. The steam source of the steam jet pump is saturated steam generated by condensation of pyrolysis oil, the pressure is 0.35-0.4 MPa, the exhaust gas and steam mixed gas at the outlet of the steam jet pump are sent to an expansion tank, non-condensable gas in the expansion tank is inert tail gas, the inert tail gas has three purposes, one of the inert tail gas serves as a cold source for adjusting the temperature of the pyrolysis gas combustion kiln, the other inert tail gas serves as an air source for adjusting the coefficient of excess air of a pyrolysis gas combustor, and the third inert tail gas serves as inert protective gas required by purging of a middle-section bell jar storage bin.

The inventor finds that the temperature of pyrolysis oil produced by a waste tire pyrolysis reaction furnace is 350-400 ℃, the pyrolysis oil needs to be condensed and fractionated and then is utilized, the condensation is generally realized through a dividing wall type heat exchanger, a cold source generally selects cooling water, the cooling water absorbs heat energy and converts the heat energy into steam, the steam with different qualities generated by multistage condensation is utilized, the steam can be used as a working fluid source with different pressure levels in a multistage steam ejector (pump) and can also be used as cooling steam of an exhaust turbine, and the total targets of material balance, water (steam) balance and energy balance in the waste tire pyrolysis process are achieved, and the total targets of energy conservation, emission reduction and cyclic utilization are achieved.

The inventor finds that in order to ensure that a waste tire feeding device is in a vacuum, inert gas protection and anaerobic closed environment, a waste tire pyrolysis reaction furnace feeding system is designed, and comprises a bucket lifting trolley mechanism and a three-section bell jar feeding mechanism, wherein the bucket lifting trolley mechanism comprises a self-weighing trolley, a lifting track and a pulley traction assembly, the three-section bell jar feeding mechanism comprises a first-section bell jar storage bin, a middle-section bell jar storage bin and a last-section bell jar storage bin, the first-section bell jar storage bin is provided with a first-section hopper body, an upper bell jar base, a lifting rod and a pin shaft assembly, the upper bell jar base is designed at the bottom of the first-section hopper body, the pin shaft assembly is connected with the upper bell jar through the lifting rod to control the upper bell jar to move up and down, and the upper bell jar is matched and tightly attached with a sealing surface of the upper bell jar base to form an upper; the middle section bell jar storage bin is provided with a middle section hopper body, a middle bell jar base, a sling chain, a rotary ball assembly, an inner and outer partition bin assembly and a tail gas recovery buffer tank, wherein the middle bell jar base is arranged at the bottom of the middle section hopper body, the rotary ball assembly is connected with the middle bell jar through the sling chain to control the middle bell jar to move up and down, a sealing surface of the middle bell jar and the middle bell jar base is matched and tightly adhered to form a lower seal of the middle section bell jar storage bin and an upper seal of the tail section bell jar storage bin, the inner and outer partition bin assembly is arranged at the upper part of the middle section hopper body, inert tail gas is output from the tail gas recovery buffer tank, enters the middle section hopper body through an outer annular air passage of the inner and outer partition bin assembly to be swept; the tail-section bell jar storage bin is provided with a tail-section hopper body, a lower bell jar seat, a suspension wire, a pull rod assembly and a multi-stage steam ejector assembly, wherein the lower bell jar seat is designed at the bottom of the tail-section hopper body, the pull rod assembly is connected with the lower bell jar through the suspension wire to control the lower bell jar to move up and down, the lower bell jar is matched and tightly attached to a sealing surface of the lower bell jar seat to form a lower seal of the tail-section bell jar storage bin, the multi-stage steam ejector assembly comprises a first-stage ejector, a second-stage ejector, a third-stage ejector, a middle condenser and a last-stage ejector, the first-stage ejector, the second-stage ejector, the third-stage ejector, the middle condenser and the last-stage ejector are sequentially connected, and.

The inventor finds that, in order to ensure that the junked tire feeding device is in vacuum, inert gas protection and oxygen-deficient closed environment, the solution of the three-section bell jar feeding mechanism is designed, as the name suggests, the feeding mechanism is isolated by bell jar sealing into a first-section bell jar storage bin, a middle-section bell jar storage bin and a last-section bell jar storage bin, the junked tire is broken into 3-4 cm rubber blocks, the junked tire is conveyed to the first-section bell jar storage bin for temporary storage through a bucket lifting trolley mechanism, the junked tire is blown out by inert tail gas through the middle-section bell jar storage bin to extrude carried air, and the inert tail gas is extracted through the last-section bell jar storage bin to be in a vacuum state, and the concrete steps are as follows: the waste tire is crushed into rubber blocks with the size of 3-4 cm, the rubber blocks are weighed by a self-weighing trolley and then are conveyed to a three-section bell jar feeding mechanism along a lifting track under the drive of a pulley traction assembly, the rubber blocks of the waste tire conveyed by a bucket lifting trolley mechanism are accumulated in a first-section bell jar storage bin, the accumulated amount of the rubber blocks accounts for the volume of a first-section hopper body, the first-section bell jar storage bin and a last-section bell jar storage bin are both in a sealed state, inert tail gas is output from a tail gas recovery buffer tank and enters the first-section hopper body through an outer annular air passage of an inner and outer partition bin assembly to be swept, air in the first-section bell jar storage bin is extruded and discharged, and the multistage steam ejector assembly comprises a first-stage ejector, a second-stage ejector, a third-stage ejector, a middle condenser and a last-stage ejector, and the vacuum degree of the last; the pin shaft assembly is connected with the upper bell jar through a suspender to control the upper bell jar to move downwards, the upper bell jar is separated from the upper bell jar base, the rubber blocks are driven by gravity to fall into the middle hopper body, the pin shaft assembly acts immediately when the accumulation amount of the rubber blocks reaches the volume of the microspheres in the middle hopper body, the upper bell jar moves upwards to be matched and tightly attached with the upper bell jar base to form a sealing surface, inert tail gas is output from the tail gas recovery buffer tank and enters the middle hopper body through the outer annular air passage of the inner and outer compartment assemblies to be blown for 30-40 s, air in the gap between the rubber blocks is extruded and discharged, and the middle hopper body is in a sealing state again after the blowing of the inert tail gas is stopped; the rotary ball assembly is connected with the middle bell jar through a suspension chain to control the middle bell jar to move downwards, and the rubber block falls into the tail section hopper body under the driving of gravity; when the rubber block accumulation amount reaches the volume of the tail-section hopper body, the rotary ball assembly acts immediately, the middle bell jar moves upwards to be matched and attached to the middle bell jar seat to form a sealing surface, the multistage steam ejector assembly is started, steam fluid works, the steam adiabatically expands in the spray pipe, the flow rate of the steam at the outlet of the spray pipe is increased, the pressure is reduced, the inert tail gas in the gap of the rubber block of the tail-section hopper body is drained and extracted, after the vacuum degree is controlled to be 1000-1300 Pa, the multistage steam ejector assembly stops working, the pull rod assembly is connected with the lower bell jar through a suspension wire to control the lower bell jar to move downwards, the rubber block is driven by gravity to fall into the vertical pyrolysis tower, and continuous production is realized through sequential circular reciprocation.

Compared with the prior art, the invention at least has the following advantages: firstly, in order to ensure that a waste tire feeding device is in a vacuum, inert gas protection and oxygen-lacking closed environment, a solution of a three-section bell jar feeding mechanism is designed, as the name suggests, the feeding mechanism is isolated into a first-section bell jar storage bin, a middle-section bell jar storage bin and a last-section bell jar storage bin through bell jar sealing, waste tires are crushed into rubber blocks with the size of 3-4 cm, the rubber blocks are conveyed to the first-section bell jar storage bin through a bucket lifting trolley mechanism for temporary storage, the rubber blocks are blown out by inert tail gas through the middle-section bell jar storage bin to extrude carried air, and then the inert tail gas is pumped out through the last-section bell jar storage bin to be in a vacuum state; secondly, the temperature of pyrolysis oil produced by the waste tire pyrolysis reaction furnace is 350-400 ℃, the pyrolysis oil needs to be condensed and fractionated and then is utilized, the condensation is generally realized through a dividing wall type heat exchanger, a cold source generally selects cooling water, the cooling water absorbs heat energy and converts the heat energy into steam, the steam with different qualities generated by multistage condensation is utilized, the steam can be used as a working fluid source with different pressure levels in a multistage steam ejector (pump) and can also be used as cooling steam of an exhaust turbine, and the total targets of material balance, water (steam) balance and energy balance in the waste tire pyrolysis process are achieved, and the total targets of energy conservation, emission reduction and cyclic utilization are achieved.

Drawings

Fig. 1 is a schematic front view of the operation method of the feeding system of the waste tire pyrolysis reactor of the present invention.

Fig. 2 is a schematic structural diagram of a large sample A of the operation method of the waste tire pyrolysis reaction furnace feeding system.

Fig. 3 is a schematic structural diagram of a large sample B of the operation method of the waste tire pyrolysis reaction furnace feeding system.

Fig. 4 is a schematic structural diagram of a large sample C of the operation method of the feeding system of the waste tire pyrolysis reaction furnace of the invention.

Fig. 5 is a schematic diagram of a large sample structure D of the operation method of the feeding system of the waste tire pyrolysis reaction furnace of the present invention.

Fig. 6 is a schematic structural diagram of a large sample E of the operation method of the feeding system of the waste tire pyrolysis reaction furnace of the invention.

I-bucket lifting trolley mechanism II-three-section type bell jar feeding mechanism

1-self-weighing trolley 2-lifting track 3-pulley traction assembly 4-initial segment bell jar storage bin

5-middle section bell jar storage 6-end section bell jar storage 7-first section hopper body 8-upper bell jar

9-upper bell jar seat 10-suspender 11-pin shaft component 12-middle section hopper body

13-middle bell jar 14-middle bell jar base 15-sling chain 16-rotary ball assembly

17-inner and outer compartment assembly 18-tail gas recovery buffer tank 19-end hopper body

20-lower bell jar 21-lower bell jar base 22-suspension wire 23-pull rod assembly

24-Multi-stage steam ejector Assembly 25-Primary ejector 26-Secondary ejector

27-three stage ejector 28-intercondenser 29-last stage ejector

30-vertical pyrolysis tower body.

Detailed Description

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

As shown in fig. 1, 2, 3, 4, 5 and 6, the operation method of the feeding system of the scrap tire pyrolysis reaction furnace is characterized in that: firstly, the waste tires are crushed into rubber blocks with the size of 3-4 cm, the rubber blocks are weighed by a self-weighing trolley 1 and then are driven by a pulley traction assembly 3 to be sent to a three-section bell jar feeding mechanism II along a lifting track 2, the rubber blocks of the waste tires conveyed by a bucket lifting trolley mechanism I are accumulated in a first-section bell jar storage bin 4, the accumulated amount of the rubber blocks accounts for the volume of a first-section hopper body 7, at the moment, the first-section bell jar storage bin 5 and a last-section bell jar storage bin 6 are both in a sealed state, inert tail gas is output from a tail gas recovery buffer tank 18 and enters a middle-section hopper body 12 through an outer annular air passage of an inner and outer compartment assembly 17 to be swept, air in the middle-section bell jar storage bin 5 is extruded and discharged, and a multi-stage steam ejector assembly 24 comprises a first-stage ejector 25, a second-stage ejector 26, a third-, and controlling the vacuum degree of the tail-section bell jar storage bin 6 to be 1000-1300 Pa through continuous multi-stage pressurization.

And step two, the pin shaft assembly 11 is connected with the upper bell jar 8 through the suspender 10, the upper bell jar 8 is controlled to move downwards, the upper bell jar 8 is separated from the upper bell jar base 9, the rubber blocks are driven by gravity to fall into the middle-section hopper body 12, the pin shaft assembly 11 immediately acts when the stacking amount of the rubber blocks reaches the microspheres volume of the middle-section hopper body 12, the upper bell jar 8 moves upwards and is tightly matched with the upper bell jar base 9 to form a sealing surface, inert tail gas is output from the tail gas recovery buffer tank 18 and enters the middle-section hopper body 12 through the outer annular air passage of the inner and outer compartment assembly 17 to be purged for 30-40 seconds, air in the gap between the rubber blocks is extruded and discharged, the middle-section hopper body 12 is in a sealing state again after the purging of the inert tail gas is stopped, the inert tail gas is the discharged waste gas after high-temperature flue gas output by the pyrolysis gas combustion kiln is subjected to heat exchange through the vertical pyrolysis tower body 30 and the rotary.

Thirdly, the rotary ball assembly 16 is connected with the middle bell jar 13 through the hanging chain 15, the middle bell jar 13 is controlled to move downwards, the rubber blocks are driven by gravity to fall into the end section hopper body 19, the rotary ball assembly 16 acts immediately when the stacking amount of the rubber blocks reaches the volume of the microspheres of the end section hopper body 19, the middle bell jar 13 moves upwards and is matched and tightly attached with the middle bell jar seat 14 to form a sealing surface, the multistage steam ejector assembly 24 is started, steam fluid works, the steam is thermally insulated in the spray pipe, the flow rate at the outlet of the spray pipe is increased while the pressure is reduced, the inert tail gas in the gap of the rubber blocks of the end section hopper body 19 is drained and extracted, the vacuum degree is controlled to be 1000-1300 Pa, the multistage steam ejector assembly 24 stops working, the pull rod assembly 23 is connected with the lower bell jar 20 through the suspension wire 22, the lower bell jar 20 is controlled to move downwards, the rubber blocks fall into the vertical pyrolysis tower body 30 under the drive of gravity, and continuous production is achieved through sequential circular reciprocation.

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 operation method of the waste tire pyrolysis reaction furnace feeding system is characterized by comprising the following steps: firstly, crushing waste tires into rubber blocks with the size of 3-4 cm, weighing the rubber blocks by a self-weighing trolley, conveying the rubber blocks to a three-section bell jar feeding mechanism along a lifting track under the driving of a pulley traction assembly, piling the rubber blocks of the waste tires conveyed by a bucket lifting trolley mechanism in a primary bell jar storage bin, wherein the piling amount accounts for the volume of a primary hopper body, the primary bell jar storage bin and a final bell jar storage bin are both in a sealed state, outputting inert tail gas from a tail gas recovery buffer tank, entering the primary hopper body through an outer annular air passage of an inner partition bin assembly and an outer partition bin assembly for blowing, and extruding and discharging air in the primary bell jar storage bin; step two, the pin shaft assembly is connected with the upper bell jar through a suspender, the upper bell jar is controlled to move downwards, the upper bell jar is separated from the upper bell jar seat, the rubber block is driven by gravity to fall into the middle hopper body, the pin shaft assembly acts immediately when the stacking amount of the rubber block reaches the microspheres volume of the middle hopper body, the upper bell jar moves upwards to be matched and tightly attached with the upper bell jar seat to form a sealing surface, inert tail gas is output from the tail gas recovery buffer tank and enters the middle hopper body through the outer annular air passage of the inner and outer compartment assemblies to be purged for 30-40 s, air in the gap of the rubber block is squeezed out and discharged, and the middle hopper body is in a sealing state again after the purging of the inert tail gas is stopped; and thirdly, the rotary ball assembly is connected with the middle bell jar through a hanging chain, the middle bell jar is controlled to move downwards, the rubber blocks are driven by gravity to fall into the tail section hopper body, the rotary ball assembly acts immediately when the accumulation amount of the rubber blocks reaches the volume of the tail section hopper body, the middle bell jar moves upwards to be matched and attached with the middle bell jar seat to form a sealing surface, the multi-stage steam ejector assembly is started, steam works in a steam fluid mode, the steam is thermally insulated in the spray pipe, the flow rate of the steam is increased and the pressure is reduced at the outlet of the spray pipe, the inert tail gas in the gap of the rubber blocks of the tail section hopper body is drained and separated, the multi-stage steam ejector assembly stops working after the vacuum degree is controlled to be 1000-1300 Pa, the pull rod assembly is connected with the lower bell jar through a hanging wire to control the lower bell jar to move downwards, the rubber blocks are driven by gravity to fall into the vertical pyrolysis.

2. The method for operating a scrap tire pyrolysis reactor feed system according to claim 1, wherein: the multistage steam ejector assembly comprises a first-stage ejector, a second-stage ejector, a third-stage ejector, an intermediate condenser and a final-stage ejector, wherein the first-stage ejector, the second-stage ejector, the third-stage ejector, the intermediate condenser and the final-stage ejector are sequentially connected, and the vacuum degree of a final-stage bell jar storage bin is controlled to be 1000-1300 Pa through continuous multistage pressurization.

3. The method for operating a scrap tire pyrolysis reactor feed system according to claim 1, wherein: the inert tail gas is the exhaust gas which is obtained by recycling high-temperature flue gas output by the pyrolysis gas combustion kiln and exchanging heat through the vertical pyrolysis tower body and the rotary rake roller, and the oxygen content is reduced to be below 3%.