JP2000501166A - Drying device with rotatable housing - Google Patents

Abstract

(57) Abstract: A thermal evaporator includes a cylindrical tube with two ends. A base is provided and the cylindrical tube is rotatable relative to the base. A first drive exerts a rotational force on the cylindrical tube. An auger with two ends penetrates the cylindrical tube and a second drive exerts a rotational force on the auger. At least one gas fired burner is provided for heating the outside of the rotating cylindrical tube. Further, a supply mechanism for introducing the liquid material inside the cylindrical tube and outside the auger in the cylindrical tube is provided.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus, and more particularly to a rotary heating apparatus having an auger for transporting materials. As the prior art environmental regulations become ever more stringent, there is increasing interest in the disposal of waste containing liquid components that can be evaporated by heat. Such waste sources are municipal waste, petrochemical industry, paper industry, food manufacturing, agriculture, remediation and cleaning businesses, and general industrial sources. SUMMARY OF THE INVENTION The present invention provides a thermal evaporator having a cylindrical tube heated by one or more gas fired burners. The cylindrical tube can rotate with respect to the base. By using both rotation of the cylindrical tube and rotation of the auger, excellent evaporation performance can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS A more complete understanding of the nature of the invention and its advantages will become apparent from a reading of the following detailed description when taken in conjunction with the drawings. FIG. 1 is a side view of the present apparatus. FIG. 2 is a plan view of the present apparatus. 3 and 4 are end views of the present apparatus. FIG. 5 is a partial cutaway schematic side view of the device in operation. DETAILED DESCRIPTION Referring initially to FIGS. 1-5 (where like numerals indicate like and corresponding parts), apparatus 10 includes a cylindrical tube 12 having two ends 14,16. Have. The cylindrical tube 12 has at least one support wheel 18 at each end 14,16. A roller 20 is rotatably mounted on the base 22 in contact with the support wheel 18 in supporting relationship, so that the cylindrical tube 12 can rotate with respect to the base 22. The first driving means 24 for exerting a rotational force on the cylindrical tube 12 includes a chain, a sprocket, a reduction gear unit, and a variable speed DC motor. A stationary wet or liquid material (hereinafter “liquid material”) receiving chamber 26 is secured to the base 22 at one end 16 of the cylindrical tube 12. A stationary dry material and product vapor discharge chamber 28 is secured to the base 22 at the other end 14 of the cylindrical tube 12. The ends 14, 16 of the cylindrical tube 12 extend into chambers 28, 26, respectively. High temperature heat resistant seals (not shown) at ends 14, 16 prevent material and vapor leakage. Auger 30 has two ends 32,34. The auger 30 passes through the cylindrical tube 12 and the stationary chambers 26 and 28. The auger 30 has a hollow central shaft 36 and is mounted in the cylindrical tube 12 rotatably supported by chambers 26, 28 at each end 34,32. The second drive means 38 for exerting a rotational force on the auger 30 comprises a suitable chain, spout, reduction gear unit and variable speed motor. An insulating cover 40 for the cylindrical tube 12 is dimensioned around the cylindrical tube 12 to define an annular space 42 within the cover 40. A plurality of gas-fired burners 44 communicate with the annular space 42 to heat the exterior 44 of the cylindrical tube 12. In a preferred embodiment, a conduit 46 connects the annular space 42 and the auger hollow shaft 36 at the liquid material receiving chamber 26 by a blower 48. In some applications, the benefits of the present invention may be obtained without the use of conduit 46. A supply means 50 is provided for introducing the liquid material 52 into the liquid material receiving chamber 26, thereby introducing the liquid material 52 into the inner annular space 54 of the cylindrical tube 12 and the outside 56 of the auger. Discharge means 58 is provided for receiving the dried material 60 at the bottom end 61 of the dry material and product vapor discharge chamber 28. A first degassing means 62 for discharging smoke 68 from the cylindrical tube 12 and the chamber 28 is connected to the top 64 of the dry material and product vapor discharge chamber 28. A second degassing means 70 for discharging combustion gas 72 is connected to the end 32 of the auger hollow shaft 36 at the drying material and product vapor discharge chamber 28. The third degassing means 74 discharges the remaining combustion gas 76. The control panel 78 can control the speed of the burner and the DC motor. An air treatment device 80 is preferably provided at the outlet of the first degassing means 62, but this is optional. A conveyor 82 may be provided for handling the dried material obtained by the apparatus, but this is optional. In operation, the device 10 has as its main component a cylindrical tube 12 with large diameter steel support wheels 18 at both ends. These support wheels 18 are arranged on rollers 20 mounted on a base 22 to allow rotation of the dewatering chamber formed by the cylindrical tube 12. This chamber is mounted on a reduction gear unit and is driven by a chain and sprocket device powered by a variable speed DC motor. The "wet end" (liquid material receiving chamber 26) and the "dry end" (dry material and generated steam discharge chamber 28) are both stationary chambers. The dehydration chambers extend into these chambers. High temperature heat resistant seals at each end around these chambers prevent material and vapor leakage. A custom screw auger with a flight mounted on the hollow shaft 36 passes through the center of the dewatering chamber and the stationary end. The auger 30 is also driven by a chain and sprocket device mounted on a reduction gear unit that is powered by a variable speed DC motor. The tumble drying chamber is housed in an insulated metal cover 40 with a gap of several inches between the insulated cover and the tube 12. Heat from the gas-fired burner 44 is introduced into this gap through a plenum located below the annular space 42 and then exhausted to the atmosphere. According to this method, the low-speed rotation chamber can be uniformly heated over the entire outer peripheral portion. If necessary, a portion of the hot combustion gas can be withdrawn from the annular space 42 by the blower 48 and injected into the "wet end" of the hollow auger shaft 36. Also, the hot combustion gases are vented to the atmosphere at the "dry end" of the system. The material 52 to be dewatered can be metered into the chamber 26 by either a variable speed screw auger or a metering pump. And, if desired, the indirect heating of a heated hollow auger shaft.Dried material 60 is discharged from the drying tube through the bottom of the "dry end" stationary chamber. Steam from the product is discharged at the top of this end. The nature and composition of the material and the requirements of the Air Quality Regulatory Agency that must be met in a particular field will determine what type of air handling device 80 (if any) is required. Although the present invention has been described with respect to particular embodiments thereof, various modifications and variations will occur to those skilled in the art, which are intended to be within the scope of the following claims.

Claims (1)

[Claims] 1. A cylindrical tube having two ends and a base, wherein the cylindrical tube is rotatable relative to the base.   And a first drive means for exerting a rotational force on the cylindrical tube, and two ends.   An auger penetrating the cylindrical tube and a second drive that applies a rotational force to the auger.   Moving means, at least one heating means for heating the outside of the rotating cylindrical tube,   Supply means for introducing the material into the inside of the cylindrical tube and outside the auger in the cylindrical tube;   A stationary liquid material receiving chamber fixed to the base at one end of the cylindrical tube, and at the other end of the cylindrical tube   A stationary dry material and a generated steam discharge chamber fixed to the base;   An end portion extends into the stationary chamber. 2. A high temperature heat-resistant seal to prevent material and vapor leakage is provided at the end of the cylindrical tube.   The device of claim 1, wherein 3. The auger extends through the cylindrical tube and the stationary chamber.   Equipment. 4. The auger is characterized in that each end is rotatably supported by the chamber.   4. The device of claim 3, wherein 5. It has a cylindrical tube with two ends and a base, the cylindrical tube being rotatable relative to the base.   And a first drive means for exerting a rotational force on the cylindrical tube, and two ends.   An auger penetrating the cylindrical tube and a second drive that applies a rotational force to the auger.   Moving means, at least one heating means for heating the outside of the rotating cylindrical tube,   Supply means for introducing the material into the inside of the cylindrical tube and outside the auger in the cylindrical tube;   A heat insulating cover for the cylindrical pipe, wherein the heat insulating cover is provided inside the heat insulating cover around the cylindrical pipe.   The heating means communicates with the annular space   A thermal evaporator characterized in that: 6. Auger connects hollow central shaft and annular space to end of auger hollow shaft   6. The apparatus of claim 5, further comprising a conduit for allowing the flow. 7. Having a supply means for introducing the liquid material into the liquid material receiving chamber of the cylindrical tube;   The device according to claim 1, characterized in that: 8. Evacuation means for receiving dry material at the bottom end of the dry material and product vapor discharge chamber are updated.   The apparatus according to claim 1, wherein the apparatus comprises: 9. Connected to the top of the dry material and product vapor discharge chamber, smoke is transferred to the cylindrical tube and the   2. The method according to claim 1, further comprising a first degassing means for discharging the gas from the chamber.   On-board equipment. Ten. At the end of the hollow central shaft of the auger at the dry material and product vapor discharge chamber   Second venting means connected to and discharging the combustion gas for discharging the combustion gas   The apparatus of claim 1, further comprising: 11. Two ends, at least one support wheel fixed to each of the ends   With the cylindrical tube in contact with the cylindrical tube support wheel in a supporting relationship.   So that it can rotate freely with respect to the base.   Roller, chain, sprocket, reduction gear unit and variable speed electric   First driving means for exerting a rotational force on the cylindrical tube, including a machine, and a base at one end of the cylindrical tube   The stationary liquid material receiving chamber in a stationary state is fixed to the stationary liquid material receiving chamber fixed to the base at the other end of the cylindrical tube.   A dry material in a stopped state and a generated steam discharge chamber, and an end of the cylindrical tube is provided in the chamber.   Extends and is provided at the end of the cylindrical tube to prevent material and vapor leakage   It has a high temperature heat-resistant seal and two ends, penetrating through the cylindrical tube and the stationary chamber   An auger having a hollow central shaft and rotating into a cylindrical tube.   The chamber is rotatably provided and each end is rotatably supported in the chamber.   Rotational force including cylindrical gear, sprocket, reduction gear unit and variable speed motor   And a heat insulating cover for the cylindrical tube, the heat insulating cover comprising:   Sized to create an annular space inside the insulation cover around the cylindrical tube   And a plurality of gas combustions in communication with the annular space to heat the outside of the cylindrical tube.   An auger hollow in the annular space at the liquid material receiving chamber by the type burner and blower   Conduit leading to the end of the central shaft and liquid material introduced into the liquid material receiving chamber   Supply means for introducing into the inside of the cylindrical tube and outside of the auger in the cylindrical tube   Discharge means for receiving the dry material at the bottom end of the dry material and product vapor discharge chamber;   Connected to the top of the dry material and product vapor discharge chamber, and for passing smoke through the cylindrical tube and the   A first degassing means for discharging from the chamber, and a space for discharging the dried material and the generated steam.   A filter connected to the end of the hollow central shaft of the auger to exhaust combustion gases   A second degassing means for discharging the combustion gas.