JP2001120979A - Vacuum and reduced pressure drying system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum and reduced pressure drying system which dispenses with a smaller floor space, dispenses with lower costs for all of installation, maintenance, and the like, is good in working accuracy, conserves the peripheral environment without public pollution such as odor and is free from danger of flash, ignition, or the like. SOLUTION: A vacuum pump is directly and successively connected to a vacuum drying device to which hot water is supplied. Draining and evacuating are effected via this vacuum pump. The dry matter is discharged from the vacuum drying device and steam drain is discharged therefrom. The vacuum pump receives water feeding for mechanically sealing the pump and condensation is performed by the water sealing water of the vacuum pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum and reduced pressure drying system, which can be used for a wide variety of applications such as food and feed such as okara, sludge, waste liquid, livestock manure, and the like, and requires a small equipment space. And a vacuum and reduced pressure drying system that can be inexpensive.

[0002]

2. Description of the Related Art It is well known that the boiling point of water is reduced under reduced pressure in a vacuum state, and a temperature difference is created by indirect heating using hot water or steam by utilizing this principle. There is known a method system for evaporating and drying water from raw materials.

This conventional system has a configuration shown in FIG. In this conventional vacuum drying system, a heat supply unit and a steam cooling unit are connected to a vacuum drying unit. The vacuum drying device in the vacuum drying unit is of a hollow tank type, and has an inlet for the raw material formed on the upper surface, and an outlet for the dry matter provided with an opening / closing door at a part on the lower side.

The heat supply unit has a hot water boiler, and the hot water is sent to the above-mentioned vacuum drying apparatus by a circulation pump to increase the temperature inside the vacuum drying apparatus.

Further, in the conventional system, a steam cooling unit is connected to the vacuum drying device, and the steam cooling unit includes a condenser for steam discharged from the vacuum drying device, and the condenser and the cooling water circulation pump. It has a cooling tower which is connected through the cooling tower. A vacuum pump is connected to the condenser to drain and exhaust.

[0006]

The conventional vacuum drying system is composed of three units as described above.
Therefore, a very large installation space is required as a plant, and in addition to installation costs, running costs including maintenance are also greatly required.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides the above-mentioned conventional situation
It was made by focusing on the problems, eliminating such problems and requiring a small installation space, all costs for installation, maintenance, etc. were low, and the work accuracy was good, In addition, an object of the present invention is to provide a vacuum and reduced pressure drying system that protects the surrounding environment without pollution such as odor and has no danger of ignition or ignition.

[0008]

According to the present invention, a vacuum pump is directly connected to a vacuum drying apparatus to which hot water is supplied, and drainage and exhaust are performed through the vacuum pump. Discharging the dried matter and discharging the steam drain from the vacuum drying apparatus, and supplying water to the vacuum pump to mechanically seal the pump. It is characterized in that it is condensed with water seal water.

[0009]

With this configuration, the vacuum and reduced pressure drying system according to the present invention does not require a steam cooling unit including a cooling tower, a condenser, a cooling water circulating pump, and the like. Small,
Maintenance becomes easy, and a vacuum drying apparatus capable of efficiently and finely drying the raw material and discharging the dried matter can be obtained.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a vacuum and reduced pressure drying system embodying the present invention,
FIG. 2 is a side view showing the mechanism of the vacuum drying apparatus used in the present invention, FIG. 3 is a rear view thereof, FIG. 4 is a plan view thereof, and FIG.
6 is a front view, FIG. 6 is a side view of the external appearance, FIG. 7 is a detail view of a portion A in FIG. 6, FIG. 8 is a detail view of a portion B in FIG.
FIG. 9 is a detailed view of the C portion.

In these figures, reference numeral 1 denotes a vacuum evaporation can constituting a vacuum drying apparatus. In the can body 1, an inlet 2 for raw materials and a viewing window 3 are juxtaposed on an upper surface, and an outlet 4 for a processed dry substance is formed on a lower surface. A hollow shaft 7 having a spiral wing 6 for stirring, which is rotated by a motor 5, is inserted into the can body 1 as will be described in detail later.
A vane 8 is provided for approaching the portion.

Hot water is used as a heating means in the can 1 and is sent as steam to the inside of the can 1 and the hollow shaft 7 to improve thermal efficiency. Further, a vacuum pump 9 is connected to the can body 1 to reduce the internal pressure and draw out the internal vapor, which is separated into water and air by a separator 10 and discharged. Further, water is supplied to the vacuum pump 9 for a mechanical seal of the pump.
Water is condensed by the water sealing of the vacuum pump 9, and the steam drain can be discharged from the can body 1 and the spiral wing 6 or the hollow shaft 7 to the outside. Further, iron and the like mixed into the water seal water are returned to a wastewater treatment facility or the like to be treated again as sludge.

Although the vacuum and reduced pressure drying system according to the present embodiment is configured as described above and sufficiently achieves the object as compared with the conventional one, it does not require the presence of the steam cooling unit unlike the conventional one. The space required for installation is significantly smaller. In a factory or the like that does not have a wastewater facility, it is also possible to perform gas-liquid separation, connect a liquid storage tank, a heat exchanger, and the like to a vacuum pump to form a circulation type.

An example of the vacuum drying apparatus used in the vacuum and reduced pressure drying system is configured in detail as follows. The vacuum drying device is a base made of H steel, etc.
The can 1 is mounted and fixed on a screw 11, and the can 1 is fixed via support brackets 12. Liners 13 are interposed in the hollow shaft 7.

At the tip of the hollow shaft 7, a rotary joint 14 is provided.
Further, a steam inlet 15 and a steam drain outlet 16 are provided. A sprocket 17 is mounted near the end of the hollow shaft 7, and a chain 46 is hung between sprockets 18 mounted on the motor shaft of the motor 5 to rotate. .

The front and rear surfaces of the can 1 are provided with flanges 19.
The front flange 19 has bolts 23.2
The front cover 21 is fixed by 3.
The hollow shaft 7 is inserted into the can body 1 through the bush 22. The front lid 21 is subjected to a heat retaining process, and silicon is applied between the front lid 21 and the flange 19.

Further, the inspection flange 24 is provided on the rear flange 20.
The can 1 can be opened and closed so that the inside of the can 1 can be cleaned and inspected. The rear end of the hollow shaft 7 is supported by a seat 25 provided on the inspection opening lid 24. 26 is a steam drain outlet, and 24a is a handle of the inspection lid 24.

A steam inlet 28 is formed in a part of the can 1, and an exhaust pipe 27 is provided in a part of the viewing window 3. On the other hand, a manual lever 29 is provided at the discharge port 4 and the input port 2.
30 is provided to open and close the valve bodies 31 and 32 so that communication with the inside of the can body 1 and closing can be achieved.

Further, the bush 22 will be described in detail.
The bush 22 has a flange portion 22a fixed to the front cover 21 by bolts 33, 33, and a contact portion with the front cover 21 is provided with a collar 34 which also contacts the hollow shaft 7, and a rear portion of the collar 34. Is provided with an oil seal 35 in contact with the hollow shaft 7. A gland packing 36 is disposed between the bush 22 and the hollow shaft 7 in front of the collar 34. The gland packing 36 is provided with bolts 37, 37,.
It is held down by the packing hold-down 38 fixed by the. Reference numeral 39 indicates a grease nipple.

Next, the seat 25 will be described in detail.
Is fixed to the inspection lid 24 by bolts 40, 40..., A bush 41 is fitted on the inner surface of the receiving seat 25, and the rear end of the hollow shaft 7 The bush 41 is fitted and supported.

Next, the viewing window 3 will be described in detail. A flange 42 is formed at the opening edge of the viewing window 3, and an overlapping flange 43 is fixed to the bolts 44 on the flange 42. A hard glass 45 coated with silicon on both sides is sandwiched and fixed between the flange 42 and the overlapping flange 43.

[0022]

The vacuum and reduced pressure drying system according to the present invention is configured as described above. Therefore, there is no need for a conventional steam cooling unit, and the installation space is small, maintenance is easy, and the cost for installation and maintenance is low. Has become. Further, the vacuum drying apparatus is also new and unique, and is an apparatus capable of performing efficient and sophisticated processing in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a vacuum and reduced pressure drying system embodying the present invention.

FIG. 2 is a side view showing a mechanism of a vacuum drying device used in the present invention.

FIG. 3 is a rear view.

FIG. 4 is a plan view.

FIG. 5 is a front view.

FIG. 6 is an external side view.

FIG. 7 is a detailed view of a portion A in FIG. 6;

FIG. 8 is a detailed view of a part B.

FIG. 9 is a detailed view of a portion C.

FIG. 10 is a block diagram showing a conventional vacuum drying system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 can 2 inlet 3 inlet window 4 outlet 5 motor 6 spiral wing 7 hollow shaft 8 blade 9 vacuum pump 10 separator 11 base 12 support bracket 13 liner 14 rotary joint 15 steam introduction Mouth 16 Outlet 17 Sprocket 18 Sprocket 19 Flange 20 Flange 21 Front lid 22 Bush 23 Bolt 24 Inspection lid 24a Handle 25 Receipt 26 Outlet 27 Exhaust pipe 28 Steam inlet 29 Lever 30 Lever 31 Valve body 32 Valve body 33 Bolt 34 Color 35 Oil seal 36 Gland packing 37 Bolt 38 Packing hold 39 Grease nipple 40 Bolt 41 Bush 42 Flange 43 Overlay flange 44 Bolt 45 Hard glass 46 Chain

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 3L113 AA07 AB05 AC01 AC15 AC24 AC40 AC42 AC48 AC49 AC54 AC58 AC60 AC63 AC67 AC75 AC77 AC90 BA36 BA37 BA38 DA02 DA06 DA10 DA17 DA19 DA21 DA22 DA25 DA26 4D059 AA01 AA03 BD11 BD19 BD21 BD25 BJ04 BJ17 CA28

Claims (3)

[Claims] 1. A vacuum pump is directly connected to a vacuum drying apparatus to which hot water is supplied, and drains and exhausts through the vacuum pump, and also discharges dry matter and vapor drains from the vacuum drying apparatus. And a vacuum and reduced pressure drying system. 2. The vacuum pump according to claim 1, wherein water is supplied to the vacuum pump to mechanically seal the pump.
2. A vacuum and reduced pressure drying system according to claim 1. 3. The vacuum and reduced pressure drying system according to claim 1, wherein the water is condensed by water sealed by the vacuum pump.