CN106732315B - Drum heating and stirring device - Google Patents
Drum heating and stirring device Download PDFInfo
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- CN106732315B CN106732315B CN201611225770.1A CN201611225770A CN106732315B CN 106732315 B CN106732315 B CN 106732315B CN 201611225770 A CN201611225770 A CN 201611225770A CN 106732315 B CN106732315 B CN 106732315B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/28—Moving reactors, e.g. rotary drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00076—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements inside the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
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Abstract
The invention relates to a drum heating and stirring device which comprises a drum shell, wherein the drum shell comprises a drum inner shell and a drum outer shell, an included angle is formed between the axis of the drum shell in the length direction and the horizontal plane, drum shafts extending outwards along the horizontal line are respectively arranged at the left corner and the right corner of the drum shell, the drum shafts are respectively supported on a support through a bearing seat, the drum shell is driven to rotate by a drum driving mechanism, a material inlet and a material outlet are arranged at the upper side corner or the lower side corner of the drum shell, an air exhaust cap is arranged in an inner cavity of the drum inner shell, a jacket heating cavity is arranged between the drum inner shell and the drum outer shell, and a heat-conducting oil heating coil is arranged in the inner cavity of the drum inner shell. The heat conduction oil heating coils are turned back in a reciprocating mode in the axial direction of the rotary drum inner shell and are connected end to end, each layer of heat conduction oil heating coils are parallel to each other and are evenly distributed on a heat exchange cylindrical surface which is spaced from the inner wall of the rotary drum inner shell by a certain distance, and at least one layer of heat exchange cylindrical surface is arranged along the radial direction of the inner cavity of the rotary drum inner shell. The drum heating and stirring device has the advantages of large heating area, good material mixing and stirring effect, uniform material heating, drying and high solid-phase polymerization speed.
Description
Technical Field
The invention relates to a drum heating and stirring device, belongs to the technical field of production and manufacturing equipment of high-viscosity polymers, and can be used for heating, drying and solid-phase polymerization of materials such as polyester, nylon and the like.
Background
Polyester solid phase polycondensation tackifying products are widely applied, and the polyester solid phase polycondensation tackifying is to heat a polyester prepolymer with a certain molecular weight to a temperature higher than the glass transition temperature of the polyester prepolymer below the melting point of the polyester prepolymer, and carry away small molecular products under the protection of vacuum pumping or inert gas so as to continue a polycondensation reaction. Traditionally, a vacuum drum is adopted for solid-phase polycondensation, and a drum heating oil pipe is adopted to heat polyester chips in the drum according to a set curve, so that the polyester chips can reach reaction conditions in a solid state.
Chinese utility model with publication number CN 201276613Y discloses an auxiliary electric heating drum device, in which electric heating rods are arranged near the feeding port and the discharging port of the drum. Although the production efficiency is improved, the comprehensive energy consumption is higher, and higher requirements are put forward on the power capacity of enterprises.
The chinese patent application with publication number CN 104324663 a discloses a drum heating device, wherein a plurality of first heating oil pipes are arranged in a drum, the plurality of first heating oil pipes are uniformly distributed along the inner wall of the drum, and two second heating oil pipes which are perpendicular to each other and penetrate through the drum are also arranged in the drum. Although the second heating oil pipe is added in the rotary drum heating device, the overall heating area is still smaller, and the overall heating time is still longer.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a drum heating and stirring device which is large in heating area, good in material mixing and stirring effect, uniform in material heating, and high in drying and solid-phase polymerization speed.
In order to solve the technical problems, the drum heating and stirring device comprises a drum shell, wherein the drum shell comprises a drum inner shell and a drum outer shell which are mutually nested and coaxial, an included angle of 25-33 degrees is formed between the axis of the drum shell in the length direction and the horizontal plane, drum shafts which are coaxial and extend outwards along the horizontal line are respectively arranged at the left corner and the right corner of the drum shell, the drum shafts are respectively supported on a support through a bearing seat, the drum shell is driven to rotate by a drum driving mechanism, a material inlet and a material outlet are arranged at the upper side corner or the lower side corner of the drum shell, an air exhaust cap used for exhausting air is arranged in an inner cavity of the drum inner shell, a jacket heating cavity is arranged between the drum inner shell and the drum outer shell, and a heat-conducting oil heating coil is arranged in the inner cavity of the drum inner shell.
Compared with the prior art, the invention has the following beneficial effects: when the material inlet and outlet are upward, feeding the material into the inner cavity of the drum shell from the material inlet and outlet, and then closing the material inlet and outlet; the drum shell is driven by the drum driving mechanism to rotate, the materials are repeatedly turned in the inner cavity of the drum shell, the jacket heating cavity and the heat conduction oil heating coil tube are used for carrying out double heating on the materials, the materials are rapidly dried and heated to be higher than the vitrification temperature below the melting point of the materials, small molecular products generated by heating are pumped out through the air pumping cap, the polycondensation reaction is continued, and the materials are rapidly tackified. The axial line of the rotary drum shell and the horizontal plane form an included angle of 25-33 degrees, which not only can ensure the axial fluidity of the materials in the inner cavity of the rotary drum shell, but also can avoid the materials from being excessively accumulated at the lower corner part, and keep a larger scattering area, so that the materials, the jacket heating surface and the heat-conducting oil heating coil have larger heat exchange areas.
As an improvement of the invention, the rotary drum shafts are hollow shafts, one of the rotary drum shafts is a vacuum pumping end rotary drum shaft, the other rotary drum shaft is a heat transfer oil inlet and outlet rotary drum shaft, a vacuum pumping end rotary joint is mounted at the outer end of the vacuum pumping end rotary drum shaft, a central pipe of the vacuum pumping end rotary joint extends into an inner cavity of the rotary drum inner shell along a central hole of the vacuum pumping end rotary drum shaft and turns upwards, the air pumping cap is mounted at the upper part of the inner end of the central pipe of the vacuum pumping end rotary joint, and the outer end of the central pipe of the vacuum pumping end rotary joint extends out of the vacuum pumping end rotary joint and is connected with a vacuum pumping port. The vacuumizing port is connected with a negative pressure system, when the vacuumizing end rotary drum shaft rotates, the central pipe of the vacuumizing end rotary joint is kept still, the top of the vacuumizing cap is always upward and is always positioned at the upper half part of the inner cavity of the rotary drum shell, the vacuumizing effect is guaranteed, and material particles are prevented from falling into the inner cavity of the vacuumizing cap.
As a further improvement of the invention, a heat-conducting oil inlet and outlet rotary joint is mounted on the outer end head of the heat-conducting oil inlet and outlet rotary drum shaft, a heat-conducting oil inlet and outlet rotary joint central pipe is arranged along the axis of the heat-conducting oil inlet and outlet rotary joint, a rotary joint oil inlet cavity is arranged between the heat-conducting oil inlet and outlet rotary joint central pipe and the heat-conducting oil inlet and outlet rotary joint shell, the rotary joint oil inlet cavity is communicated with the central pore passage of the heat-conducting oil inlet and outlet rotary joint, a rotary joint heat-conducting oil inlet is arranged at the upper part of the shell circumference of the heat-conducting oil inlet and outlet rotary joint, and a plurality of rotary drum shaft oil penetrating holes communicated with the jacket heating cavity are uniformly distributed on the circumference of the heat-conducting oil inlet and outlet rotary drum shaft; the heat transfer oil inlet and outlet rotary joint comprises a rotary drum shell, a heat transfer oil inlet and outlet end rotary joint shell, a heat transfer oil outlet of a jacket heating cavity is formed in the center, far away from a heat transfer oil inlet and outlet end rotary joint shaft, of the rotary drum shell, the heat transfer oil outlet of the jacket heating cavity is connected with a heat transfer oil return pipe, the heat transfer oil return pipe extends to one side where the heat transfer oil inlet and outlet end rotary joint shaft is located, the extending end of the heat transfer oil return pipe extends into an inner cavity of the heat transfer oil inlet and outlet end rotary joint shaft and is connected with an inner end of a heat transfer oil inlet and outlet end rotary joint center pipe, an outer end of the heat transfer oil inlet and outlet end rotary joint center pipe extends out of an outer end of the heat transfer oil inlet and outlet end rotary joint shell, and an outer end of the heat transfer oil outlet end rotary joint center pipe is provided with a rotary joint heat transfer oil outlet. The heat-conducting oil inlet and outlet end rotary drum shaft rotates along with the rotary drum shell, a central pipe of a rotary joint at the heat-conducting oil inlet and outlet end is kept still, high-temperature heat-conducting oil enters a rotary joint oil inlet cavity between the central pipe of the rotary joint at the heat-conducting oil inlet and outlet end and the rotary joint shell at the heat-conducting oil inlet and outlet end from a rotary joint heat-conducting oil inlet on the circumference of the rotary joint shell at the heat-conducting oil inlet and outlet end, then enters a central hole passage of the rotary drum shaft at the heat-conducting oil inlet and outlet end, enters a jacket heating cavity from an oil penetrating hole of the rotary drum shaft, fills the jacket heating cavity and flows leftwards until the heat-conducting oil flows out from a jacket heating cavity heat-conducting oil outlet at the center of the other end of the rotary drum shell, flows to one side where the heat-conducting oil inlet and outlet end rotary joint through a heat-conducting oil return pipe, and finally flows out from a heat-conducting oil outlet of the rotary joint; the temperature field of the jacket heating cavity is ensured to be uniform, and the material is heated from the outside.
As a further improvement of the invention, the oil inlet end of the heat-conducting oil heating coil is connected with the inner end head of the heat-conducting oil inlet and outlet rotary drum shaft and is communicated with the central pore channel of the heat-conducting oil inlet and outlet rotary drum shaft; the oil outlet end of the heat conduction oil heating coil pipe penetrates through the rotary drum shell and is connected with the heat conduction oil return pipe through a confluence tee joint. The heat conducting oil enters the heat conducting oil heating coil from the left end of the central hole passage of the heat conducting oil inlet and outlet rotary drum shaft while entering the jacket heating cavity, and goes along the heat conducting oil heating coil in a winding and winding way until entering the heat conducting oil return pipe from the oil outlet end of the heat conducting oil heating coil through the confluence tee joint, and flows to one side of the rotary drum shaft at the heat conducting oil inlet and outlet end along the heat conducting oil return pipe together with the oil outlet of the jacket heating cavity. The heat-conducting oil heating coil and the jacket heating cavity form a parallel connection relation and are directly connected with high-temperature heat-conducting oil, so that the heating intensity of the inner shell of the rotary drum and the inner cavity of the inner shell of the rotary drum is also high.
As a further improvement of the invention, a flow limiting pore plate is arranged in an inner cavity of an inlet section of the heat conducting oil return pipe, the flow limiting pore plate is positioned between a heat conducting oil outlet of the jacket heating cavity and the confluence tee joint, and the aperture ratio of the flow limiting pore plate enables the flow ratio of the jacket heating cavity and the heat conducting oil heating pipe to be equal to the heat exchange area ratio between the jacket heating cavity and the heat conducting oil heating pipe. Because the flow path sectional area of conduction oil heating coil is far less than the flow path sectional area of pressing from both sides the cover heating chamber, and the flow path length of conduction oil heating coil is far greater than the flow path length that presss from both sides the cover heating chamber far away for the pressure differential at conduction oil heating coil both ends is far greater than the pressure differential that presss from both sides the cover heating chamber both ends, set up the current-limiting orifice plate at the heat conduction oil export of pressing from both sides the cover heating chamber, increase the resistance that presss from both sides the outflow of cover heating chamber conduction oil, be favorable to balancing the flow of conduction oil heating coil and pressing from both sides the cover heating chamber, make the temperature field of rotary drum inner shell and its inner chamber more even.
As a further improvement of the invention, the heat conduction oil heating coils are turned back and forth in a reciprocating manner along the axial direction of the drum inner shell and are connected end to end, each layer of heat conduction oil heating coils are parallel to each other and are uniformly distributed on a heat exchange cylindrical surface which is spaced from the inner wall of the drum inner shell by a certain distance, and at least one layer of heat exchange cylindrical surface is arranged along the radial direction of the inner cavity of the drum inner shell. The heat-conducting oil heating coil is folded back in a snake shape along the length direction of the rotary drum inner shell and surrounds a circle along the cylindrical surface of the inner cavity of the rotary drum inner shell, so that the heat-conducting oil heating coil is uniformly distributed along the full length direction and the full circumference direction of the rotary drum inner shell, compared with the traditional method of radially distributing the heating coil along the rotary drum inner shell, the heating area is increased by several times or even tens of times, the heating strength is greatly improved, and no blind area exists in the flowing process of the heat-conducting oil along the heat-conducting oil heating coil. The heat-conducting oil heating coil is folded back and forth along the axial direction of the drum inner shell, so that the temperatures at two ends of the inner cavity of the drum inner shell are very uniform; in the rotating process of the drum shell, all materials inevitably pass through the cylindrical surface formed by the heat conduction oil heating coil when being turned over, so that all the materials can contact the heat conduction oil heating coil, and the heating efficiency is further improved.
As a further improvement of the invention, the inner wall of the drum inner shell is provided with an annular support ring for supporting each layer of the heat conduction oil heating coil, two ends of each layer of the heat conduction oil heating coil are respectively embedded in the inner edge grooves of the annular support ring, and a plurality of material through holes are uniformly distributed on the circumference of each annular support ring contacting with the drum inner shell. The annular support ring plays a supporting and positioning role in the heat conduction oil heating coil, and in the turning process, material particles positioned at the bottom of the annular support ring can both pass through the material through holes to flow downwards, so that local material overheating is avoided.
As a further improvement of the invention, the drum inner shell is formed by compounding an inner shell stainless steel plate positioned on the inner layer and an inner shell carbon steel plate positioned on the outer layer, the drum outer shell is a carbon steel plate, and a plurality of carbon steel supporting tubes are uniformly connected between the inner shell carbon steel plate and the drum outer shell. The stainless steel plate of the inner shell is contacted with the material, so that the material can be prevented from being polluted, the carbon steel plate of the inner shell is compounded on the outer side of the stainless steel plate of the inner shell, the strength of the whole inner shell of the rotary drum can be improved, the wall thickness of the inner shell of the rotary drum is reduced, the whole weight of the equipment is light, and the manufacturing cost is low; the inner shell carbon steel plate, the drum outer shell and the carbon steel supporting tube are made of the same material, and the welding performance of two ends of the carbon steel supporting tube is guaranteed. Because the rotary drum needs frequent temperature rise and temperature reduction in work, the carbon steel plate of the inner shell, the outer shell of the rotary drum and the carbon steel supporting tube are made of the same material and have the same thermal expansion coefficient, so that the thermal stress generated in the temperature rise and drop process can be reduced, and the welding seam is prevented from being torn.
As a further improvement of the invention, the drum driving mechanism and the vacuum pumping end drum shaft are positioned on the same side, the drum driving mechanism comprises a speed reducer driven by a main motor, a main chain wheel is installed on an output shaft of the speed reducer, a drum shaft chain wheel is installed on the vacuum pumping end drum shaft, and the drum shaft chain wheel is in transmission connection with the main chain wheel through a chain. Due to the requirement of vacuum pumping, the diameter ratio of the central pipe of the rotary joint at the heat conduction oil inlet and outlet ends is larger, so that the diameter of the rotary drum shaft at the vacuum pumping end is larger than that of the rotary drum shaft at the heat conduction oil inlet and outlet ends, the strength is higher, a key groove and a shaft shoulder are more convenient to arrange on the rotary drum shaft at the vacuum pumping end, and the radial and axial fixation of the rotary drum shaft chain wheel is realized through a key and the shaft shoulder; and no high-temperature heat conduction oil passes through the vacuumizing end drum shaft, so that no high-temperature heat conduction oil is splashed out even if cracks or fractures occur in the work, and serious safety accidents are avoided.
As a further improvement of the invention, the included angle between the axis of the rotary drum shell and the horizontal plane is 28 degrees, the gear ratio of the rotary drum shaft chain wheel to the main chain wheel is 1:3, and the rotating speed of the rotary drum shaft chain wheel is below 2 revolutions per minute. The included angle between the axis of the rotary drum shell and the horizontal plane is 28 degrees, so that no residue of materials at the bottom of the seal head can be ensured during discharging; because the weight of the rotary drum is larger, the consumed power for parking and starting is larger, the gear ratio of the rotary drum shaft chain wheel to the main chain wheel is set to be 1:3, and the rotating speed of the rotary drum shaft chain wheel is controlled to be less than 2 revolutions per minute, so that the impact of starting the rotary drum driving mechanism can be relieved.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.
FIG. 1 is a front view of a drum type heating and stirring apparatus according to the present invention.
FIG. 2 is a cross-sectional view of the inner cavity of the drum inner shell provided with a layer of heat conducting oil heating coil.
FIG. 3 is a sectional view of the inner cavity of the inner shell of the rotary drum provided with two layers of heat-conducting oil heating coils.
In the figure: 1. a drum housing; 1a, a heat-conducting oil outlet of a jacket heating cavity; 2. a drum inner shell; 3. a carbon steel support tube; 4. feeding and discharging ports; 5. rotating the drum shaft at the vacuumizing end; 6. a vacuum pumping end rotary joint; 6a, vacuumizing a rotary joint central tube; 6b, vacuumizing port; 6c, an air exhaust cap; 6d, a temperature detection probe; 7. the heat conducting oil inlet and outlet ends rotate the drum shaft; 8. a heat conducting oil inlet and outlet end rotary joint; 8a, a heat conducting oil inlet of the rotary joint; 8b, a central pipe of the rotary joint of the heat conduction oil inlet and outlet ends; 8c, a heat conducting oil outlet of the rotary joint; 8d, rotating drum shaft oil penetration holes; 9. a heat conducting oil heating coil; 10. a heat conducting oil return pipe; 10a, a confluence tee joint; 10b, a restriction orifice plate; 11. an annular support ring; a material through hole; 12. a sampling tube; 12a, sealing the pipe cap; 13. a main motor; 14. a speed reducer; 15. a main sprocket; 16. a chain; 17. a drum shaft sprocket; 18. a bearing seat; 19. a support; v1. a first sampling valve; v2. second sampling valve.
Detailed Description
As shown in fig. 1 to 3, the drum comprises a drum shell, the drum shell comprises a drum inner shell 2 and a drum outer shell 1 which are nested with each other and coaxial, an included angle of 25-33 degrees is formed between the axis of the drum shell in the length direction and the horizontal plane, drum shafts which are coaxial and extend outwards along the horizontal line are respectively arranged at the left corner and the right corner of the drum shell, the drum shafts are respectively supported on a support 19 through a bearing seat 18, the drum shell is driven to rotate by a drum driving mechanism, a material inlet and a material outlet 4 are arranged at the upper side or the lower side corner of the drum shell, an air suction cap 6c for sucking air is arranged in an inner cavity of the drum inner shell 2, a jacket heating cavity is arranged between the drum inner shell 2 and the drum outer shell 1, and a heat-conducting oil heating coil 9 is arranged in the inner cavity of the drum inner shell 2.
When the material inlet and outlet 4 faces upwards, the material is fed into the inner cavity of the drum shell from the material inlet and outlet 4, and then the material inlet and outlet 4 is closed; the rotary drum shell rotates under the driving of the rotary drum driving mechanism, materials are repeatedly turned over in an inner cavity of the rotary drum shell, the jacket heating cavity and the heat conduction oil heating coil pipe 9 perform double heating on the materials, the materials are rapidly dried and heated to a temperature higher than the vitrification temperature of the materials below the melting point of the materials, small molecular products generated by heating are pumped out through the air pumping cap 6c, the polycondensation reaction is continued, and the materials are rapidly tackified. The included angle between the axis of the rotary drum shell and the horizontal plane is 25-33 degrees, which not only can ensure the axial fluidity of the materials in the inner cavity of the rotary drum shell, but also can avoid the materials from being excessively accumulated at the lower corner part, and keep larger scattering area, so that the materials, the jacket heating surface and the heat-conducting oil heating coil 9 have larger heat exchange area.
The rotary drum shafts are hollow shafts, one rotary drum shaft is a vacuumizing end rotary drum shaft 5, the other rotary drum shaft is a heat conduction oil inlet and outlet end rotary drum shaft 7, a vacuumizing end rotary joint 6 is installed at the outer end head of the vacuumizing end rotary drum shaft 5, a central pipe of the vacuumizing end rotary joint 6 extends into an inner cavity of the rotary drum inner shell 2 along a central hole of the vacuumizing end rotary drum shaft 5 and turns upwards, an air suction cap 6c is installed at the upper portion of the inner end head of a central pipe 6a of the vacuumizing end rotary joint, and the outer end head of the central pipe 6a of the vacuumizing end rotary joint extends out of the vacuumizing end rotary joint 6 and is connected with a vacuumizing port 6b. The vacuumizing port 6b is connected with a negative pressure system, when the vacuumizing end rotary drum shaft 5 rotates, the vacuumizing end rotary joint central pipe 6a is kept still, the top of the vacuumizing cap 6c is always upward and is always positioned at the upper half part of the inner cavity of the rotary drum shell, the vacuumizing effect is guaranteed, and material particles are prevented from falling into the inner cavity of the vacuumizing cap 6c.
The temperature detection probe 6d extends inwards from the outer end of the central tube 6a of the rotary joint of the vacuumizing end along the axis of the central tube 6a of the rotary joint of the vacuumizing end until the probe is inserted into the inner cavity of the drum inner shell 2 to detect the temperature of the inner cavity of the drum inner shell.
A heat-conducting oil inlet and outlet rotary joint 8 is mounted at the outer end head of the heat-conducting oil inlet and outlet rotary drum shaft 7, a heat-conducting oil inlet and outlet rotary joint central pipe 8b is arranged along the axis of the heat-conducting oil inlet and outlet rotary joint 8, a rotary joint oil inlet cavity is arranged between the heat-conducting oil inlet and outlet rotary joint central pipe 8b and the shell of the heat-conducting oil inlet and outlet rotary joint 8, the rotary joint oil inlet cavity is communicated with a central pore passage of the heat-conducting oil inlet and outlet rotary drum shaft 7, a rotary joint heat-conducting oil inlet 8a is arranged at the upper part of the circumference of the shell of the heat-conducting oil inlet and outlet rotary joint 8, and a plurality of rotary drum shaft oil penetrating holes 8d communicated with the jacket heating cavity are uniformly distributed on the circumference of the heat-conducting oil inlet and outlet rotary drum shaft 7; the center of the rotary drum shell 1 far away from the heat conduction oil inlet and outlet rotary drum shaft 7 is provided with a jacket heating cavity heat conduction oil outlet 1a, the jacket heating cavity heat conduction oil outlet 1a is connected with a heat conduction oil return pipe 10, the heat conduction oil return pipe 10 extends to one side of the rotary drum shaft 7 at the heat conduction oil inlet and outlet along the outer wall of the rotary drum shell 1, the extending end of the heat conduction oil return pipe 10 extends into the inner cavity of the rotary drum shaft 7 at the heat conduction oil inlet and outlet and is connected with the inner end of a heat conduction oil inlet and outlet rotary joint central pipe 8b, the outer end of the heat conduction oil inlet and outlet rotary joint central pipe 8b extends out from the outer end of the shell of the heat conduction oil inlet and outlet rotary joint 8b and turns upwards, and the outer end of the heat conduction oil inlet and outlet rotary joint central pipe 8b is provided with a rotary joint heat conduction oil outlet 8c.
The heat conducting oil inlet and outlet end rotary drum shaft 7 keeps the central pipe 8b of the heat conducting oil inlet and outlet end rotary joint still in the process of rotating along with the rotary drum shell, high-temperature heat conducting oil enters the oil inlet cavity of the rotary joint between the central pipe 8b of the heat conducting oil inlet and outlet end rotary joint and the rotary joint shell of the heat conducting oil inlet and outlet end from the heat conducting oil inlet 8a of the rotary joint on the circumference of the rotary joint shell of the heat conducting oil inlet and outlet end, then enters a central pore passage of a rotary drum shaft 7 at the heat conducting oil inlet and outlet ends, enters a jacket heating cavity from an oil penetrating hole 8d of the rotary drum shaft, fills the jacket heating cavity and flows leftwards until the heat conducting oil flows out from a heat conducting oil outlet 1a of the jacket heating cavity at the center of the other end of the rotary drum shell 1, the heat-conducting oil flows to one side of the rotary drum shaft 7 at the heat-conducting oil inlet and outlet ends through a heat-conducting oil return pipe 10, enters a central pipe 8b of the rotary joint at the heat-conducting oil inlet and outlet ends and finally flows out from a heat-conducting oil outlet 8c of the rotary joint; the temperature field of the jacket heating cavity is ensured to be uniform, and the material is heated from the outside.
The oil inlet end of the heat conduction oil heating coil pipe 9 is connected with the inner end head of the heat conduction oil inlet and outlet end rotary drum shaft 7 and is communicated with the central hole channel of the heat conduction oil inlet and outlet end rotary drum shaft 7; the oil outlet end of the heat conducting oil heating coil pipe 9 penetrates through the rotary drum shell and is connected with a heat conducting oil return pipe 10 through a confluence tee joint 10a. While the heat conduction oil enters the jacket heating cavity from the central hole passage of the heat conduction oil inlet and outlet rotary drum shaft 7, the heat conduction oil enters the heat conduction oil heating coil pipe 9 from the left end of the central hole passage of the heat conduction oil inlet and outlet rotary drum shaft 7, and meanders and moves forward along the heat conduction oil heating coil pipe 9 until the heat conduction oil enters the heat conduction oil return pipe 10 from the oil outlet end of the heat conduction oil heating coil pipe 9 through the confluence tee joint 10a, and the heat conduction oil and the outlet oil of the jacket heating cavity flow to one side where the heat conduction oil inlet and outlet rotary drum shaft 7 is located along the heat conduction oil return pipe 10 together.
The inner cavity of the inlet section of the heat conducting oil return pipe 10 is provided with a flow limiting pore plate 10b, and the flow limiting pore plate 10b is positioned between the heat conducting oil outlet 1a of the jacket heating cavity and the confluence tee 10a. The aperture ratio of the current limiting orifice plate 10b enables the flow ratio of the jacket heating cavity and the conduction oil heating coil 9 to be equal to the heat exchange area ratio between the jacket heating cavity and the conduction oil heating coil. For example, the total flow of heat transfer oil is 50 m/h, the heat exchange area of the jacket heating cavity is 36 square meters, the heat exchange area of the heat transfer oil heating coil is 18 square meters, the length of the corresponding heat transfer oil heating coil is 100m, and the size of the coil is 57 x 3 mm; according to area distribution flow, coil pipe flow is 16.5 m/h, and the coil pipe resistance drops to 1.2Bar, because the jacket resistance can be neglected, the resistance loss that corresponds the orifice plate this moment is 1.2Bar, and the flow of jacket heating chamber is 33.5 m tope/h.
The heat conduction oil heating coils 9 are turned back in a reciprocating mode in the axial direction of the rotary drum inner shell 2 and are connected end to end, each layer of heat conduction oil heating coils 9 are parallel to each other and are evenly distributed on a heat exchange cylindrical surface which is spaced from the inner wall of the rotary drum inner shell 2 by a certain distance, and at least one layer of heat exchange cylindrical surface is arranged in the radial direction of the inner cavity of the rotary drum inner shell. According to the process requirements, when the heat exchange cylindrical surface is provided with two or more layers along the radial direction of the inner cavity of the drum inner shell, the layers can be connected in series or in parallel, at least one group of heat medium inlet and outlet of the coil pipe is arranged, and multiple inlets and outlets can also be adopted. The invention realizes that the heat conduction oil heating coils 9 are uniformly arranged along the full length direction and the full circumference direction of the rotary drum inner shell 2, increases the heating area by several times or even tens of times compared with the traditional heating coils arranged along the radial direction of the rotary drum inner shell 2, and greatly improves the heating intensity.
The inner wall of the drum inner shell 2 is provided with an annular support ring 11 for supporting each layer of heat conduction oil heating coil pipe 9, two ends of each layer of heat conduction oil heating coil pipe 9 are respectively embedded in the inner edge groove of the annular support ring 11, and a plurality of material through holes 11a are uniformly distributed on the circumference of each annular support ring 11 contacted with the drum inner shell. The annular support ring 11 plays a role in supporting and positioning the heat conduction oil heating coil pipe 9, and in the turning process, material particles positioned at the bottom of the annular support ring 11 can both pass through the material through hole 11a and flow downwards, so that local material overheating is avoided.
The drum inner shell 2 is formed by compounding an inner shell stainless steel plate positioned on the inner layer and an inner shell carbon steel plate positioned on the outer layer, the drum outer shell 1 is a carbon steel plate, and a plurality of carbon steel supporting tubes 3 are uniformly connected between the inner shell carbon steel plate and the drum outer shell 1. The stainless steel plate of the inner shell, which is in contact with the material, adopts an S30408 stainless steel plate, so that the material can be ensured not to be polluted; compounding a Q345R inner shell carbon steel plate on the outer side of the inner shell stainless steel plate, wherein the allowable stress of the S30408 stainless steel plate at 250 ℃ is 122MPa, the allowable stress of the Q345R inner shell carbon steel plate with the thickness of 3-16 mm at 250 ℃ is 167MPa, and the allowable stress of the Q345R inner shell carbon steel plate with the thickness of 16-36 mm at 250 ℃ is 157 MPa; the thermal conductivity of the S30408 stainless steel plate at 200 ℃ is 17.45W/mK, and the thermal conductivity of the Q345R inner shell carbon steel plate at 200 ℃ is 44.19W/mK. The composite layer structure can improve the strength of the whole drum inner shell 2, reduce the wall thickness of the drum inner shell 2, and ensure that the whole equipment has light weight and low manufacturing cost; the heat conductivity coefficient of the inner shell carbon steel plate is more than one time higher than that of the inner shell stainless steel plate, and the heat transfer efficiency of the jacket heating cavity is improved. In addition, the inner shell carbon steel plate and the drum outer shell 1 are made of the same material as the carbon steel supporting tube 3, so that the welding performance of two ends of the carbon steel supporting tube 3 is ensured. Because the drum needs frequent temperature rise and temperature reduction in work, the carbon steel plate of the inner shell, the outer shell 1 of the drum and the carbon steel supporting tube 3 are made of the same material and have the same thermal expansion coefficient, so that the thermal stress generated in the temperature rise and drop process can be reduced, and the tearing of a welding seam is avoided.
The rotary drum driving mechanism and the vacuumizing end rotary drum shaft 5 are located on the same side, the rotary drum driving mechanism comprises a speed reducer 14 driven by a main motor 13, a main chain wheel 15 is installed on an output shaft of the speed reducer 14, a rotary drum shaft chain wheel 17 is installed on the vacuumizing end rotary drum shaft 5, and the rotary drum shaft chain wheel 17 is in transmission connection with the main chain wheel 15 through a chain 16. Due to the requirement of vacuum pumping, the diameter of the central pipe 8b of the rotary joint at the heat conduction oil inlet and outlet end is larger, so that the diameter of the rotary drum shaft 5 at the vacuum pumping end is larger than that of the rotary drum shaft 7 at the heat conduction oil inlet and outlet end, the strength is higher, a key groove and a shaft shoulder are more convenient to arrange on the rotary drum shaft 5 at the vacuum pumping end, and the radial and axial fixation of the rotary drum shaft chain wheel 17 is realized through the key and the shaft shoulder; and no high-temperature heat conduction oil passes through the vacuumizing end drum shaft 5, so that no high-temperature heat conduction oil is splashed out even if cracks or fractures occur in the work, and major safety accidents are avoided.
The included angle between the axis of the rotary drum shell and the horizontal plane is 28 degrees, so that no residue of materials at the bottom of the seal head can be ensured during discharging.
The gear ratio of the rotary drum shaft chain wheel 17 to the main chain wheel 15 is 1:3, and the rotating speed of the rotary drum shaft chain wheel 17 is below 2 r/min. Because the weight of the rotary drum is larger, the consumed power for parking and starting is larger, the impact of starting the rotary drum driving mechanism can be relieved by setting the gear ratio of the rotary drum shaft chain wheel 17 to the main chain wheel 15 to be 1:3 and controlling the rotating speed of the rotary drum shaft chain wheel 17 to be less than 2 r/min.
The circumference of the rotary drum shell is connected with a sampling tube 12, a first sampling valve V1 and a second sampling valve V2 are installed on the sampling tube 12 from inside to outside in series, and a sealing tube cap 12a is screwed on an outer tube opening of the sampling tube 12. During the sample, rotatory to the decurrent position of sampling tube 12 with the rotary drum casing, spin off sealed pipe cap 12a, open first sample valve V1 earlier, make the material granule fall to between first sample valve V1 and the second sample valve V2, then close first sample valve V1, open second sample valve V2 again, the material granule falls, close second sample valve V2 again, seal pipe cap 12a is screwed, can ensure not to destroy the vacuum of rotary drum inner chamber during the sample like this.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments, for example, the left and right directions may be interchanged, and any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.
Claims (8)
1. The utility model provides a rotary drum heating agitating unit, includes the rotary drum casing, the rotary drum casing includes nested and coaxial rotary drum inner shell and rotary drum shell each other, the axis of rotary drum casing length direction personally submits 25 ~ 33 contained angles with the level, the left and right side bight of rotary drum casing is equipped with coaxial line respectively and outwards extends along water flat line's rotary drum axle, the rotary drum axle supports on the support through the bearing frame respectively, the rotary drum casing is rotated by the drive of rotary drum actuating mechanism, the upside or the downside bight of rotary drum casing are equipped with into discharge gate, the inner chamber of rotary drum inner shell is equipped with the cap of bleeding that is used for bleeding, its characterized in that: a jacket heating cavity is arranged between the rotary drum inner shell and the rotary drum outer shell, and a heat conduction oil heating coil is arranged in an inner cavity of the rotary drum inner shell;
the heat transfer oil inlet and outlet end rotating joint comprises a heat transfer oil inlet and outlet end rotating joint body, a heat transfer oil inlet and outlet end rotating joint center pipe and a heat transfer oil inlet and outlet end rotating joint body, wherein the heat transfer oil inlet and outlet end rotating joint center pipe is arranged along the axis of the heat transfer oil inlet and outlet end rotating joint body; the oil inlet cavity of the rotary joint is communicated with a central pore passage of the rotary drum shaft at the heat conduction oil inlet and outlet ends, the upper part of the circumference of the shell of the rotary joint at the heat conduction oil inlet and outlet ends is provided with a heat conduction oil inlet of the rotary joint, and a plurality of rotary drum shaft oil penetrating holes communicated with the jacket heating cavity are uniformly distributed on the circumference of the rotary drum shaft at the heat conduction oil inlet and outlet ends; a heat conduction oil outlet of a jacket heating cavity is formed in the center of the rotary drum shell, which is far away from the heat conduction oil inlet and outlet ends of the rotary drum shaft, and the heat conduction oil outlet of the jacket heating cavity is connected with a heat conduction oil return pipe;
the oil inlet end of the heat conduction oil heating coil is connected with the inner end head of the heat conduction oil inlet and outlet rotary drum shaft and is communicated with the central pore canal of the heat conduction oil inlet and outlet rotary drum shaft; the oil outlet end of the heat conduction oil heating coil penetrates through the rotary drum shell and is connected with the heat conduction oil return pipe through a confluence tee joint;
the heat conduction oil return pipe is characterized in that a flow limiting pore plate is arranged in an inner cavity of an inlet section of the heat conduction oil return pipe, the flow limiting pore plate is positioned between a heat conduction oil outlet of the jacket heating cavity and the confluence tee joint, and the aperture ratio of the flow limiting pore plate enables the flow ratio of the jacket heating cavity and the heat conduction oil heating pipe to be equal to the heat exchange area ratio between the jacket heating cavity and the heat conduction oil heating pipe.
2. A drum heater agitator apparatus as set forth in claim 1, wherein: the utility model discloses a vacuum pump, including evacuation end rotary joint, evacuation end rotary joint's center tube edge the centre bore of evacuation end rotary joint stretches into the inner chamber of rotary drum inner shell and turn round upwards, the cap of bleeding is installed the overhead portion in the inner of evacuation end rotary joint center tube, the outer end of evacuation end rotary joint center tube is stretched out the outer evacuation end that just is connected with the evacuation mouth that just is connected with of evacuation end rotary joint.
3. A drum heater agitator apparatus as set forth in claim 2, wherein: the heat conduction oil return pipe extends to one side of the heat conduction oil inlet and outlet rotary drum shaft along the outer wall of the rotary drum shell, the extending end of the heat conduction oil return pipe extends into the inner cavity of the heat conduction oil inlet and outlet rotary drum shaft and is connected with the inner end of the heat conduction oil inlet and outlet rotary joint central pipe, the outer end of the heat conduction oil inlet and outlet rotary joint central pipe extends out of the outer end of the heat conduction oil inlet and outlet rotary joint shell, and a rotary joint heat conduction oil outlet is formed in the outer end of the heat conduction oil inlet and outlet rotary joint central pipe.
4. A drum heater agitator apparatus as set forth in claim 1, wherein: the heat conduction oil heating pipes are in reciprocating return along the axial direction of the rotary drum inner shell and are connected end to end, the heat conduction oil heating pipes are mutually parallel and are uniformly distributed on a heat exchange cylindrical surface which is spaced from the inner wall of the rotary drum inner shell by a certain distance, and at least one layer of heat exchange cylindrical surface is arranged along the radial direction of the inner cavity of the rotary drum inner shell.
5. A drum heater agitator apparatus as set forth in claim 4, wherein: the inner wall of the rotary drum inner shell is provided with an annular support ring for supporting each layer of the heat conduction oil heating coil, two ends of each layer of the heat conduction oil heating coil are respectively embedded in grooves in the inner edge of the annular support ring, and a plurality of material through holes are uniformly distributed on the circumference of each annular support ring, which is in contact with the rotary drum inner shell.
6. A drum heater agitator apparatus as set forth in claim 1, wherein: the drum inner shell is formed by compounding an inner shell stainless steel plate positioned on the inner layer and an inner shell carbon steel plate positioned on the outer layer, the drum outer shell is a carbon steel plate, and a plurality of carbon steel supporting tubes are uniformly connected between the inner shell carbon steel plate and the drum outer shell.
7. A drum heater agitator apparatus as claimed in any one of claims 2 to 6, wherein: the rotary drum driving mechanism and the vacuumizing end rotary drum shaft are located on the same side, the rotary drum driving mechanism comprises a speed reducer driven by a main motor, a main chain wheel is installed on an output shaft of the speed reducer, a rotary drum shaft chain wheel is installed on the vacuumizing end rotary drum shaft, and the rotary drum shaft chain wheel is in transmission connection with the main chain wheel through a chain.
8. A drum heater agitator apparatus as set forth in claim 7, wherein: the included angle between the axis of the rotary drum shell and the horizontal plane is 28 degrees, the gear ratio of the rotary drum shaft chain wheel to the main chain wheel is 1:3, and the rotating speed of the rotary drum shaft chain wheel is below 2 revolutions per minute.
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| CN107914348A (en) * | 2017-12-29 | 2018-04-17 | 张家港市荣胜机械有限公司 | A kind of highly effective drying thickening vacuum drum |
| CN108398040B (en) * | 2018-05-02 | 2024-01-12 | 江苏远方涂装环保科技有限公司 | Rotary heat exchanger |
| CN109611827B (en) * | 2018-12-03 | 2020-08-18 | 宁波力芯科信息科技有限公司 | Temperature self-regulating flameless combustion device |
| CN110171065A (en) * | 2019-06-24 | 2019-08-27 | 深圳市格瑞实业发展有限公司 | A kind of Mobile type asphalt concrete agitating device |
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| FR2545331A1 (en) * | 1983-02-22 | 1984-11-09 | Gen Foods Corp | Method for coating foods |
| JPH11128878A (en) * | 1997-11-05 | 1999-05-18 | Mitsui Eng & Shipbuild Co Ltd | Thermal decomposition reactor for waste treating device |
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| CN2192855Y (en) * | 1994-03-02 | 1995-03-22 | 陈启松 | Full-efficiency dehydrator |
| CN103464084B (en) * | 2013-09-10 | 2016-05-18 | 张家港保税区万盛机械工业有限公司 | Batch (-type) solid-phase tack producing device |
| CN103920446B (en) * | 2014-04-29 | 2016-10-05 | 张家兴 | Spherical all-in-one multifunctional machine |
| CN104324663A (en) * | 2014-10-28 | 2015-02-04 | 南通御丰塑钢包装有限公司 | Rotary drum heating device |
| CN206355992U (en) * | 2016-12-27 | 2017-07-28 | 扬州惠通化工科技股份有限公司 | A kind of rotary drum heating and stirring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2545331A1 (en) * | 1983-02-22 | 1984-11-09 | Gen Foods Corp | Method for coating foods |
| JPH11128878A (en) * | 1997-11-05 | 1999-05-18 | Mitsui Eng & Shipbuild Co Ltd | Thermal decomposition reactor for waste treating device |
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