CN107141506B - Reclaimed rubber desulfurization machine - Google Patents
Reclaimed rubber desulfurization machine Download PDFInfo
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- CN107141506B CN107141506B CN201710355292.4A CN201710355292A CN107141506B CN 107141506 B CN107141506 B CN 107141506B CN 201710355292 A CN201710355292 A CN 201710355292A CN 107141506 B CN107141506 B CN 107141506B
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- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
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Abstract
The invention provides a reclaimed rubber desulfurization machine capable of saving materials and time of a single test and used for a reclaimed rubber formula test, which comprises a uniform-speed feeding device, a spiral conveying device and a discharging cooling device, wherein the spiral conveying device comprises a first heating device, a second heating device, a first heat preservation device and a second heat preservation device; the first discharging cooling device and the second discharging cooling device respectively comprise a screw shaft conveying device, a water cooling device, a cooling water joint and a driving device, the water cooling device is arranged outside the screw shaft conveying device, and the screw shaft conveying device is connected with the driving device. The invention has the beneficial effects that: only a small amount of waste rubber and auxiliary agents are needed to complete each desulfurization, so that raw materials and time of a formula test are saved.
Description
The invention patent with application date of 2015.05.13 and application number of 201510241957.X named as 'a reclaimed rubber formula test method and reclaimed rubber devulcanizer' is filed as a parent application.
Technical Field
The invention relates to the field of regenerated rubber, in particular to a regenerated rubber desulfurization machine for a regenerated rubber formula test.
Background
The disposal of waste rubber is one of the serious problems facing people today. In order to meet the requirements of continuously improved material properties, rubber develops towards the directions of high strength, wear resistance, stability and aging resistance, but simultaneously, the problem that the discarded rubber cannot be naturally degraded for a long time is caused, and a large amount of waste rubber causes black pollution which is more difficult to treat than plastic pollution (white pollution). On the other hand, precious rubber resources are wasted. Millions of tons of waste rubber are generated every year all over the world, the quantity is huge, and how to effectively treat the waste rubber becomes a problem of general social attention. Therefore, in addition to burning waste rubber products piled up in mountains as fuel, scientists in various countries have studied more effective waste rubber regeneration treatment technology since 1910. The regenerated rubber refers to rubber which is prepared by crushing, heating, mechanically treating and other physical and chemical processes of waste vulcanized rubber, so that the waste vulcanized rubber is changed into rubber which has plasticity and viscosity and can be re-vulcanized. The essence of the regeneration process is that under the comprehensive action of heat, oxygen, mechanical action, chemical and physical action of the regenerant and the like, the vulcanized rubber network is damaged and degraded, and the fracture position has cross-linking bonds and macromolecular bonds among the cross-linking bonds.
The waste vulcanized rubber can become a plastic vulcanized rubber material after regeneration. However, because of the combination of various synthetic rubbers, the poor classification of the recycled waste vulcanized rubber, the complex composition of the regenerated raw rubber, the great variation and the difficulty in achieving the purpose of complete regeneration by using a certain fixed regeneration condition, a formula test is required before the production of the regenerated rubber. The regenerated rubber can be identified by a formula test, and a reference is provided for changing the regeneration condition and improving the quality of the regenerated rubber. In order to determine the proportion of various raw materials, a traditional formula test adopts a dynamic devulcanizer to break sulfur links, and the principle of the formula test is to adopt high temperature, high pressure, water addition and various auxiliary sulfur-breaking materials to break sulfur of vulcanized rubber powder and plasticize the vulcanized rubber powder into regenerated rubber. The dynamic desulfurization takes high-pressure saturated steam as a heat source, the desulfurization temperature is about 220 ℃, the steam pressure is as high as 2.5MPa, the rubber powder is swelled under the action of high temperature and high pressure and a regenerant, the swelling has certain time persistence, occupies the rebound space of macromolecules, forces the macromolecules to slowly lose elasticity, gradually reduces the molecules, and the rubber needs to be kept for a certain time when being swelled to the maximum degree, namely the necessary time for the macromolecules to lose elastic memory, which also causes the too long time consumption of the desulfurization mode. The desulfurization process of the formula test method has the defects of high and unsafe pressure, waste water and waste gas emission, low yield, high energy consumption and the like, a large amount of raw materials need to be delivered every desulfurization, the desulfurization process of a single test needs more than 3 hours, and the formula test needs to be carried out repeatedly, so that the raw materials and the time cost are greatly input when the desulfurization method is used for the formula test.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the reclaimed rubber desulfurization machine for the reclaimed rubber formula test can save materials and time of a single test.
In order to solve the technical problems, the invention adopts the technical scheme that:
the technical scheme adopted by the invention is as follows: a reclaimed rubber desulfurization machine comprises a lifting feeding device, a temporary storage feeding device, a constant-speed feeding device, a spiral conveying device and a discharge cooling device, wherein a discharge hole of the lifting feeding device is connected with a feed hole of the temporary storage feeding device, and a discharge hole of the temporary storage feeding device is connected with a feed hole of the constant-speed feeding device;
the spiral conveying device comprises a first heating device, a second heating device, a first heat preservation device and a second heat preservation device, a discharge hole of the uniform-speed feeding device is connected with a feed hole of the first heating device, a discharge hole of the first heating device is connected with a feed hole of the second heating device, a discharge hole of the second heating device is connected with a feed hole of the first heat preservation device, and a discharge hole of the first heat preservation device is connected with a feed hole of the second heat preservation device;
the first heating device, the second heating device, the first heat preservation device and the second heat preservation device respectively comprise a screw shaft, a transmission mechanism and a cylinder sleeve, the cylinder sleeve is sleeved outside the screw shaft, one side of the screw shaft is connected with a transmission shaft of the transmission mechanism through a coupler, infrared heating pipes are arranged on the outer walls of the cylinder sleeves of the first heating device and the second heating device, heat insulation layers are arranged on the outer walls of the cylinder sleeves of the first heat preservation device and the second heat preservation device, and the screw shaft comprises a conveying rotating shaft and conveying screw blades which are arranged on the conveying rotating shaft and used for propelling materials;
the inner diameters of the first heating device, the second heating device and the first heat preservation device are gradually increased, and the inner diameters of the second heat preservation device and the first heat preservation device are the same;
the discharge cooling device comprises a first discharge cooling device and a second discharge cooling device, a discharge hole of the second heat preservation device is connected with a feed hole of the first discharge cooling device, a discharge hole of the first discharge cooling device is connected with a feed hole of the second discharge cooling device, the first discharge cooling device and the second discharge cooling device respectively comprise a screw shaft conveying device, a water cooling device, a cooling water joint and a driving device, the water cooling device is arranged outside the screw shaft conveying device, and the screw shaft conveying device is connected with the driving device;
and the first discharging cooling device and the second discharging cooling device are connected by flanges.
The invention has the beneficial effects that: in the reclaimed rubber desulfurization machine, the waste rubber powder sequentially passes through the lifting feeding device, the temporary storage feeding device, the constant-speed feeding device, the first heating device, the second heating device, the first heat preservation device, the second heat preservation device, the first discharging cooling device and the second discharging cooling device and is preheated in the first heating device, so that the phenomenon of rubber particle coking caused by temperature sudden rise is avoided; after secondary cooling, the time of the material in the discharging cooling device is prolonged, the cooling speed can be accelerated, and the production efficiency is improved; by adopting a high-temperature normal-pressure process, compared with a dynamic desulfurizing tank adopting a high-temperature high-pressure process in the traditional process, the method has the advantages of no discharge of waste gas and waste water, energy conservation and environmental protection; an infrared heating mode is adopted, so that the energy is saved, the efficiency is high, no pollution is caused, and the production cost is greatly reduced; in the heating process, water is not needed to be added to the materials to accelerate the cooling speed, so that the materials can keep a certain dryness, the quality of the produced regenerated rubber is stable, and no wastewater is generated; an exhaust hole or other water removing devices are not needed, so that the structure is simple; the rubber powder is fully expanded in the first heat preservation device and the second heat preservation device and is uniformly mixed, and the produced regenerated rubber is excellent in quality and stable in quality.
Drawings
FIG. 1 is a schematic view of a devulcanizer for reclaimed rubber in example 2 of the present invention.
Description of reference numerals:
1. a temporary storage feeding device; 2. a uniform feeding device; 31. a first heating device; 32. a second heating device; 33. a first heat preservation device; 34. a second heat preservation device; 41. a first discharge cooling device; 42. and a second discharge cooling device.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The most key concept of the invention is as follows: the compounding is in proper order through preheating, heating, heat preservation and cooling process under the ordinary pressure, screw rod rotational speed reduces during the heat preservation, screw rod rotational speed increases during the cooling to prolong the heat preservation time, cooling with higher speed, under the shearing extrusion effect of screw rod, only need deliver a small amount of compounding and also can reach the effect the same with a large amount of compounding of delivering, avoided the waste rubber shock cooling to be of unstable quality down, finally with the time control of desulfurization process 15 ~ 19min, greatly saved the experimental time of formula and raw materials cost.
The invention provides a technical scheme that:
a testing method for a regenerated rubber formula comprises the following steps:
step 1, crushing waste rubber into waste rubber powder of 20-30 meshes;
step 2, continuously preheating, heating, preserving heat and cooling a mixed material obtained by mixing waste rubber powder, an activating agent, a softening agent and other auxiliaries at normal pressure to obtain regenerated rubber, wherein the preheating, heating, preserving heat and cooling processes are all conveyed through respective independent screws, the preheating and heating are realized by heating the mixed material in an infrared heating mode, the preheating temperature is 50-60 ℃, the heating temperature is 280-300 ℃, the screw rotating speed is 24r/min during preheating and heating, and the total preheating and heating time is 5-6 min; the rotating speed of the screw is 16r/min during heat preservation, and the heat preservation time is 7-9 min; and the rotating speed of the screw is 30r/min during cooling, and the cooling time is 3-4 min.
From the above description, the beneficial effects of the present invention are: the mixed material of the waste rubber powder, the activating agent, the softening agent and other auxiliary agents is preheated at 50-60 ℃ before being heated, and the waste rubber powder is crushed into particles of 20-30 meshes and heated in an infrared heating mode, so that the waste rubber powder can be slowly and uniformly heated, and the coking phenomenon of the waste rubber powder in the heating and conveying process caused by slow heat conduction and sudden temperature rise of rubber is avoided, and the quality of a final product is further influenced; preheating and heating are controlled to be 5-6 min, heat preservation is carried out for 7-9 min after heating, the rotating speed is reduced to 16r/min during heat preservation, sufficient expansion time and space can be provided for rubber particles, and regenerated rubber obtained through heat preservation is more stable and uniform in quality; the cooling is carried out for 3-4 min after the heat preservation is carried out for 7-9 min, the rotating speed of a screw rod during cooling is 30r/min, the cooling speed is accelerated, the problem that the quality of the rubber powder is affected due to the fact that water is added into the rubber powder can be solved, the materials are sequentially preheated, heated, kept warm and cooled under the normal pressure, the rotating speed of the screw rod during heat preservation is reduced, the rotating speed of the screw rod during cooling is increased, the heat preservation time is prolonged, cooling is accelerated, under the shearing and extruding action of the screw rod, the effect the same as that of a large number of materials can be achieved by only delivering a small number of materials, unstable quality of waste rubber under sudden cooling is avoided, the time of the desulfurization process is controlled to be 15-19 min finally, and the time and the raw material.
Further, the method also comprises the step 3: and (3) testing the chemical and physical performance indexes of the regenerated rubber according to GB/T134602008, and if the test result does not meet the GB/T134602008, changing the proportion of the waste rubber powder, the activating agent and the softening agent, and repeating the step 2 and the step 3.
Further, before the normal-pressure continuous desulfurization in the step 2, the waste rubber powder, the activating agent, the softening agent and other auxiliary agents are uniformly stirred by a high-speed stirrer.
As can be seen from the above description, the quality of the reclaimed rubber can be made uniform by uniformly stirring the waste rubber powder, the activator, the softener and other auxiliaries with a high-speed stirrer before the normal-pressure continuous desulfurization is carried out.
Further, the softening agent is coal tar, the activating agent is RX-680, and the other auxiliary agents comprise nickel dibutyl dithiocarbamate and 2-thiol benzothiazole.
Referring to fig. 1, another technical solution provided by the present invention is: the device comprises a lifting feeding device, a temporary storage feeding device 1, a constant speed feeding device 2, a spiral conveying device, a discharging cooling device and an electrical control device, wherein a discharging port of the lifting feeding device is connected with a feeding port of the temporary storage feeding device 1, and a discharging port of the temporary storage feeding device 1 is connected with a feeding port of the constant speed feeding device 2;
the spiral conveying device comprises a first heating device 31, a second heating device 32, a first heat preservation device 33 and a second heat preservation device 34, a discharge hole of the uniform-speed feeding device 2 is connected with a feed hole of the first heating device 31, a discharge hole of the first heating device 31 is connected with a feed hole of the second heating device 32, a discharge hole of the second heating device 32 is connected with a feed hole of the first heat preservation device 33, and a discharge hole of the first heat preservation device 33 is connected with a feed hole of the second heat preservation device 34; the first heating device 31, the second heating device 32, the first heat preservation device 33 and the second heat preservation device 34 respectively comprise a screw shaft, a cylinder sleeve and a transmission mechanism, the cylinder sleeve is sleeved outside the screw shaft, one side of the screw shaft is connected with a transmission shaft of the transmission mechanism through a coupler, infrared heating pipes are arranged on the outer walls of the cylinder sleeves of the first heating device 31 and the second heating device 32, and heat insulation layers are arranged on the outer walls of the cylinder sleeves of the first heat preservation device 33 and the second heat preservation device 34;
the discharge cooling device comprises a first discharge cooling device 41 and a second discharge cooling device 42, a discharge hole of the second heat preservation device 34 is connected with a feed hole of the first discharge cooling device 41, and a discharge hole of the first discharge cooling device 41 is connected with a feed hole of the second cooling device; the first discharging cooling device 41 and the second discharging cooling device 42 both comprise a screw shaft conveying device, a water cooling device, a cooling water joint and a driving device, the water cooling device is arranged outside the screw shaft conveying device, and the screw shaft conveying device is connected with the driving device;
the inner diameters of the first heating device 31, the second heating device 32 and the first heat preservation device 33 are gradually increased, and the inner diameters of the second heat preservation device 34 and the first heat preservation device 33 are the same.
Before the waste rubber powder is desulfurized, whether sundries exist in the regenerated rubber desulfurizer is checked firstly, the water cooling device of the first discharging cooling device 41 and the water cooling device of the second discharging cooling device 42 are started after the waste rubber powder is cleaned, the waste rubber powder is conveyed to the temporary storage feeding device 1 when the temperature of the first heating device 31 reaches 100 ℃, then the waste rubber powder enters the uniform speed feeding device 2 and then enters the first heating device 31 for preheating, the waste rubber powder enters the second heating device 32 after preheating, the waste rubber powder sequentially passes through the first heat preservation device 33 and the second heat preservation device 34 for fully reacting, finally, the waste rubber powder is cooled by water in the first discharging cooling device 41 and the second discharging cooling device 42, and a product obtained from a discharge port of the second discharging cooling device 42 is the regenerated rubber powder. And (3) the material flows in the whole regenerated rubber desulfurization machine for 15-30 minutes to complete desulfurization, so as to obtain the regenerated rubber powder.
Furthermore, cooling water is introduced to the outside of the first discharge cooling device 41, and cold water is introduced to the outside of the second discharge cooling device 42, so that the material cooling process can be accelerated.
In the reclaimed rubber desulfurization machine, the inner diameters of the first heating device 31, the second heating device 32 and the first heat preservation device 33 are gradually increased, the inner diameters of the second heat preservation device 34 and the first heat preservation device 33 are the same, and the first heat preservation device 33 and the second heat preservation device 34 provide expansion space for rubber, so that the produced reclaimed rubber has excellent quality, the electric energy is saved, and the first heat preservation device 33 and the second heat preservation device 34 do not need to be heated; the speed of the rubber powder is gradually reduced in the first heating device 31, the second heating device 32 and the first heat preservation device 33 so as to prolong the heat preservation time, fully mix the rubber powder and stabilize the quality of the obtained regenerated rubber.
In the reclaimed rubber devulcanizer, rubber powder is chemically reacted during transfer and finally molded. However, at various stages in the process, there are requirements on reaction time and the amount of waste rubber crumb. The conveying device in the prior art is of a uniform structure from top to bottom, the time and conveying amount of conveying the waste rubber powder by the spiral shaft are not matched with the processing requirements, and the waste rubber powder is coked in the heating and conveying process due to slow heat conduction of rubber, so that the quality of a final product is influenced; the conveying amount is controlled by the temporary storage device and the uniform-speed feeding device 2, the processes of preheating, reheating, heat preservation and cooling are adopted, the material residence time of each stage is independently controlled, the temperature of the material is increased and then decreased step by step in the conveying process, the heating in the whole conveying process is not needed, the energy is greatly saved, and meanwhile, the regenerated rubber with good stability is obtained.
From the above description, the beneficial effects of the present invention are:
1. the waste rubber powder sequentially passes through the lifting feeding device, the temporary storage feeding device 1, the uniform speed feeding device 2, the first heating device 31, the second heating device 32, the first heat preservation device 33, the second heat preservation device 34, the first discharging cooling device 41 and the second discharging cooling device 42, and is preheated in the first heating device 31, so that the phenomenon of rubber particle coking caused by temperature sudden rise is avoided;
2. after secondary cooling, the time of the material in the discharging cooling device is prolonged, the cooling speed can be accelerated, and the production efficiency is improved;
3. compared with a dynamic devulcanizer adopting a high-temperature and high-pressure process in the traditional process, the high-temperature and normal-pressure process has the advantages that no waste gas and waste water are discharged, the low-carbon manufacturing, clean production and green development of the regenerated rubber are realized, the production is carried out under the normal pressure condition, the potential safety hazard generated under the high-pressure condition is avoided, and the safe production is really realized;
4. the infrared heating mode is adopted, the conversion consumption of water and vapor phase heating energy in the traditional method is avoided, and compared with a dynamic method, the energy can be saved by about 30 percent, and the energy is saved, the efficiency is high, and no pollution is caused;
5. the investment of a boiler, a steam generator, a tail gas purification device and an oil gas pipeline is saved, the investment can be saved by 50 percent, and the production cost is greatly reduced;
6. in the heating process, water is not needed to be added to the materials to accelerate the cooling speed, so that the materials can keep a certain dryness, the quality of the produced regenerated rubber is stable, and no wastewater is generated; an exhaust hole or other water removing devices are not needed, so that the structure is simple;
7. continuous production is realized, and the history of the traditional intermittent production of the reclaimed rubber is changed;
8. the production automation degree is improved, the labor consumption is reduced, the labor intensity is reduced, and the production environment is improved;
9. the rubber can be used for producing waste tire reclaimed rubber, butyl reclaimed rubber, ethylene propylene diene monomer reclaimed rubber, nitrile reclaimed rubber and the like, thereby really realizing the multiple purposes of one machine;
10. the rubber powder is fully expanded in the first heat preservation device 33 and the second heat preservation device 34 and is uniformly mixed, and the produced regenerated rubber has excellent quality and stable quality.
Furthermore, a material level detector is arranged on the temporary storage device.
Furthermore, the transmission mechanism comprises a frequency converter, a motor, a speed reducer, a gear kinematic pair and a chain wheel kinematic pair, wherein the frequency converter, the motor and the speed reducer are connected in sequence.
Further, the uniform-speed feeding device 2 comprises a spiral shaft, a frequency converter, a motor and a speed reducer which are connected in sequence.
Furthermore, the screw shaft conveying device consists of a single screw shaft and a cylinder sleeve or a double screw shaft and a cylinder sleeve.
Further, the screw shaft comprises a conveying rotating shaft and a conveying screw blade which is arranged on the conveying rotating shaft and used for propelling the materials.
Further, the first discharge cooling device 41 and the second discharge cooling device 42 are in flange connection.
Example 1 of the present invention is: 100Kg of waste steel wire tires with the particle size of 20 meshes are taken, 1.5Kg of activating agent is added into the waste steel wire tires, 16Kg of softening agent is added into the waste steel wire tires, the mixed materials are put into a regenerated rubber desulfurization machine for desulfurization, and the mixed materials are sequentially preheated, heated, kept warm and cooled, wherein: preheating at 55 ℃, wherein the heating rotating speed is 24 revolutions per minute, the heating temperature is 280-300 ℃, and the heating time is 5 minutes; the heat preservation rotating speed is 16 revolutions per minute, and the heat preservation time is 8 minutes; the cooling speed was 30 revolutions per minute for 3 minutes. The cooled rubber powder can be agglomerated but not adhered by lightly holding with hands, has high desulfurization degree, and can be used for tensile test and vulcanization test.
Comparative example 1
100Kg of waste steel wire tires with the particle size of 20 meshes are taken and added into a dynamic devulcanizer with the volume of 6 cubic meters, 1.5Kg of activating agent and 16Kg of softening agent are added into the dynamic devulcanizer, the mixed materials are devulcanized for 3 hours at 220 ℃ and under the steam pressure of 2.5MPa, rubber powder is coked in the devulcanizer, and cannot be taken out for subsequent tensile test and vulcanization test.
Comparative example 2
Taking waste rubber powder with the particle size of 20 meshes 1.5T, adding the waste rubber powder into a dynamic devulcanizer with the volume of 6 cubic meters, adding 5Kg of activating agent and 270Kg of softening agent into the waste rubber powder, and desulfurizing the mixed material for 3 hours under the conditions of 220 ℃ and steam pressure of 2.5MPa, wherein the desulfurized rubber powder can be agglomerated but not adhered by hand when being held by hand lightly, the desulfurization degree is high, and the desulfurized material can be subjected to a tensile test and a vulcanization test.
Referring to fig. 1, an embodiment 2 of the present invention is: a reclaimed rubber desulfurization machine comprises a lifting feeding device, a temporary storage feeding device 1, a constant speed feeding device 2, a spiral conveying device, a discharge cooling device and an electrical control device, wherein a discharge port of the lifting feeding device is connected with a feed port of the temporary storage feeding device 1, and a discharge port of the temporary storage feeding device 1 is connected with a feed port of the constant speed feeding device 2; the spiral conveying device comprises a first heating device 31, a second heating device 32, a first heat preservation device 33 and a second heat preservation device 34, a discharge hole of the uniform-speed feeding device 2 is connected with a feed hole of the first heating device 31, a discharge hole of the first heating device 31 is connected with a feed hole of the second heating device 32, a discharge hole of the second heating device 32 is connected with a feed hole of the first heat preservation device 33, and a discharge hole of the first heat preservation device 33 is connected with a feed hole of the second heat preservation device 34; the first heating device 31, the second heating device 32, the first heat preservation device 33 and the second heat preservation device 34 respectively comprise a screw shaft, a cylinder sleeve and a transmission mechanism, the cylinder sleeve is sleeved outside the screw shaft, one side of the screw shaft is connected with a transmission shaft of the transmission mechanism through a coupler, infrared heating pipes are arranged on the outer walls of the cylinder sleeves of the first heating device 31 and the second heating device 32, and heat insulation layers are arranged on the outer walls of the cylinder sleeves of the first heat preservation device 33 and the second heat preservation device 34; the discharge cooling device comprises a first discharge cooling device 41 and a second discharge cooling device 42, a discharge hole of the second heat preservation device 34 is connected with a feed hole of the first discharge cooling device 41, and a discharge hole of the first discharge cooling device 41 is connected with a feed hole of the second cooling device; the first discharging cooling device 41 and the second discharging cooling device 42 both comprise a screw shaft conveying device, a water cooling device, a cooling water joint and a driving device, the water cooling device is arranged outside the screw shaft conveying device, and the screw shaft conveying device is connected with the driving device; the inner diameters of the first heating device 31, the second heating device 32 and the first heat preservation device 33 are gradually increased, and the inner diameters of the second heat preservation device 34 and the first heat preservation device 33 are the same. And a material level detector is arranged on the temporary storage device. The transmission mechanism comprises a frequency converter, a motor, a speed reducer, a gear kinematic pair and a chain wheel kinematic pair, wherein the frequency converter, the motor and the speed reducer are connected in sequence. The uniform-speed feeding device 2 comprises a spiral shaft, a frequency converter, a motor and a speed reducer which are connected in sequence. The screw shaft conveying device consists of a single screw shaft and a cylinder sleeve or a double screw shaft and a cylinder sleeve. The screw shaft comprises a conveying rotating shaft and a conveying screw blade which is arranged on the conveying rotating shaft and used for propelling materials.
In summary, the reclaimed rubber test method and the reclaimed rubber devulcanizer provided by the invention have the beneficial effects that: according to the regenerated rubber formula test method, the mixed material of the waste rubber powder, the activating agent, the softening agent and other auxiliaries is preheated at 50-60 ℃ before being heated, and the waste rubber powder is crushed into particles of 20-30 meshes and heated in an infrared heating mode, so that the waste rubber powder can be slowly and uniformly heated, and the problem that the quality of a final product is influenced due to the coking phenomenon of the waste rubber powder in the heating and conveying process caused by slow heat conduction and sudden temperature rise of rubber is avoided; preheating and heating are controlled to be 5-6 min, heat preservation is carried out for 7-9 min after heating, the rotating speed is reduced to 16r/min during heat preservation, sufficient expansion time and space can be provided for rubber particles, and regenerated rubber obtained through heat preservation is more stable and uniform in quality; the rubber powder is cooled for 3-4 min through flowing water outside the pipe after heat preservation for 7-9 min, the rotating speed of a screw rod is 30r/min during cooling, the cooling speed is accelerated, the problem that the quality of the rubber powder is affected due to the fact that water is added into the rubber powder for cooling can be avoided, the mixed materials sequentially undergo the preheating, heating, heat preservation and cooling processes under the normal pressure, the rotating speed of the screw rod is reduced during heat preservation, the rotating speed of the screw rod is increased during cooling, the heat preservation time is prolonged, cooling is accelerated, the same effect as that of delivering a large amount of mixed materials can be achieved only by delivering a small amount of mixed materials under the shearing and extruding effects of the screw rod, the quality instability of the waste rubber under shock cooling shock heating is avoided, the time of the desulfurization process is controlled to be 15-19 min, and. In the reclaimed rubber desulfurization machine, the waste rubber powder sequentially passes through the lifting feeding device, the temporary storage feeding device, the constant-speed feeding device, the first heating device, the second heating device, the first heat preservation device, the second heat preservation device, the first discharging cooling device and the second discharging cooling device and is preheated in the first heating device, so that the phenomenon of rubber particle coking caused by temperature sudden rise is avoided; after secondary cooling, the time of the material in the discharging cooling device is prolonged, the cooling speed can be accelerated, and the production efficiency is improved; by adopting a high-temperature normal-pressure process, compared with a dynamic desulfurizing tank adopting a high-temperature high-pressure process in the traditional process, the method has the advantages of no discharge of waste gas and waste water, energy conservation and environmental protection; an infrared heating mode is adopted, so that the energy is saved, the efficiency is high, no pollution is caused, and the production cost is greatly reduced; in the heating process, water is not needed to be added to the materials to accelerate the cooling speed, so that the materials can keep a certain dryness, the quality of the produced regenerated rubber is stable, and no wastewater is generated; an exhaust hole or other water removing devices are not needed, so that the structure is simple; the rubber powder is fully expanded in the first heat preservation device and the second heat preservation device and is uniformly mixed, and the produced regenerated rubber is excellent in quality and stable in quality.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (2)
1. A reclaimed rubber devulcanizer is characterized in that: the device comprises a lifting feeding device, a temporary storage feeding device, a constant speed feeding device, a spiral conveying device and a discharging cooling device, wherein a discharging port of the lifting feeding device is connected with a feeding port of the temporary storage feeding device, and a discharging port of the temporary storage feeding device is connected with a feeding port of the constant speed feeding device;
the spiral conveying device comprises a first heating device, a second heating device, a first heat preservation device and a second heat preservation device, a discharge hole of the uniform-speed feeding device is connected with a feed hole of the first heating device, a discharge hole of the first heating device is connected with a feed hole of the second heating device, a discharge hole of the second heating device is connected with a feed hole of the first heat preservation device, and a discharge hole of the first heat preservation device is connected with a feed hole of the second heat preservation device;
the first heating device, the second heating device, the first heat preservation device and the second heat preservation device respectively comprise a screw shaft, a transmission mechanism and a cylinder sleeve, the cylinder sleeve is sleeved outside the screw shaft, one side of the screw shaft is connected with a transmission shaft of the transmission mechanism through a coupler, infrared heating pipes are arranged on the outer walls of the cylinder sleeves of the first heating device and the second heating device, heat insulation layers are arranged on the outer walls of the cylinder sleeves of the first heat preservation device and the second heat preservation device, and the screw shaft comprises a conveying rotating shaft and conveying screw blades which are arranged on the conveying rotating shaft and used for propelling materials;
the inner diameters of the first heating device, the second heating device and the first heat preservation device are gradually increased, and the inner diameters of the second heat preservation device and the first heat preservation device are the same;
the discharge cooling device comprises a first discharge cooling device and a second discharge cooling device, a discharge hole of the second heat preservation device is connected with a feed hole of the first discharge cooling device, a discharge hole of the first discharge cooling device is connected with a feed hole of the second discharge cooling device, the first discharge cooling device and the second discharge cooling device respectively comprise a screw shaft conveying device, a water cooling device, a cooling water joint and a driving device, the water cooling device is arranged outside the screw shaft conveying device, and the screw shaft conveying device is connected with the driving device;
and the first discharging cooling device and the second discharging cooling device are connected by flanges.
2. The reclaimed rubber devulcanizer of claim 1, wherein: the constant-speed feeding device is characterized by further comprising a temporary storage feeding device, wherein a discharge hole of the temporary storage feeding device is connected with a feed hole of the constant-speed feeding device, a discharge hole of the constant-speed feeding device is connected with a feed hole of the first heating device, and a material level detector is arranged on the temporary storage feeding device;
the uniform-speed feeding device comprises a spiral shaft, a frequency converter, a motor and a speed reducer which are connected in sequence;
the screw shaft conveying device consists of a single screw shaft and a cylinder sleeve or a double screw shaft and a cylinder sleeve.
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| CN201710355292.4A CN107141506B (en) | 2015-05-13 | 2015-05-13 | Reclaimed rubber desulfurization machine |
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| CN201510241957.XA CN104890165B (en) | 2015-05-13 | 2015-05-13 | Regenerated rubber formula test method, and regenerated rubber desulphurization machine |
| CN201710355292.4A CN107141506B (en) | 2015-05-13 | 2015-05-13 | Reclaimed rubber desulfurization machine |
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| CN105949502B (en) * | 2016-07-01 | 2023-03-28 | 山西礼信橡胶科技有限公司 | Vertical self-pressurizing and heating regenerated rubber device |
| CN106009034A (en) * | 2016-07-07 | 2016-10-12 | 福建省邵武市恒晖橡胶再生有限公司 | Regenerated rubber desulphurization method |
| CN107868274A (en) * | 2017-12-25 | 2018-04-03 | 福建省邵武市恒晖橡胶再生有限公司 | A kind of preparation method of reclaimed rubber |
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| CN87209463U (en) * | 1987-06-20 | 1988-05-25 | 重庆长江橡胶厂 | High temperature continuous desulphurizing machine for regenerated rubber |
| CN101434710B (en) * | 2008-12-18 | 2010-07-14 | 泰安市金山橡胶工业有限公司 | Automatic rubber powder plasticizing process and apparatus thereof |
| CN102030934B (en) * | 2009-09-30 | 2016-08-03 | 陈汇宏 | A kind of method of scrap rubber hot recycling |
| CN201677424U (en) * | 2010-01-11 | 2010-12-22 | 姜维 | Waste rubber powder automatic sulfur-breaking plasticizing device |
| CN101880406B (en) * | 2010-07-08 | 2012-02-01 | 都江堰市新时代工贸有限公司 | Method for normal pressure continuous desulfurization of rubber |
| CN102220006B (en) * | 2011-04-28 | 2012-09-26 | 天津大学 | Mixed filling type thermal conductive silicone rubber composite and preparation method thereof |
| US9120898B2 (en) * | 2011-07-08 | 2015-09-01 | Baker Hughes Incorporated | Method of curing thermoplastic polymer for shape memory material |
| EP2546294A1 (en) * | 2011-07-14 | 2013-01-16 | NCT GmbH | Method and assembly for converting old rubber tyres to reusable fluid materials |
| CN202744483U (en) * | 2012-07-06 | 2013-02-20 | 金茂龙 | Constant-pressure continuous rubber regenerating device |
| CN203461993U (en) * | 2013-07-29 | 2014-03-05 | 台州中宏废橡胶综合利用有限公司 | Waste rubber desulfurization plasticizing device |
| CN103753729A (en) * | 2014-01-03 | 2014-04-30 | 张兴和 | Continuous plasticizing production device and method |
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| CN104890165B (en) | 2017-04-19 |
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