JPH0699153A - Method and apparatus for cleaning surface of solid continuously - Google Patents

Abstract

PURPOSE:To provide a cleaning method and an apparatus which remove a quantity of liquid and solid stuck on the surface of a solid efficiently at a low running cost without oxidizing the material to be treated and can recover the liquid and the solid almost in the original condition. CONSTITUTION:The first vacuum heating chamber 14, the second vacuum heating chamber 24, and the third vacuum heating chamber 36, having a closed space and equipped with a heating means, an evacuation means, a condensation means, and a pressurization means by non-oxidizing gas are installed jointly. A material to be treated is fed into the heating chambers in sequence and heated at different temperatures in each of these chambers so that the deposit is removed by evaporation. The deposit removed is condensed for recovery. A front vacuum replacement chamber 3 for the preliminary heating of the material to be treated is placed in front of the first vacuum heating chamber 14, while at the rear of the third vacuum heating chamber 36 is placed a back vacuum replacement chamber 47 for cooling the material to be treated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for removing water, oil, liquids or solids such as zinc plating, etc. adhering to the surface of an article, such as zinc plated on an iron plate or The present invention relates to a method and an apparatus for continuously cleaning a solid surface used for removing copper, water, oil and the like adhering to the surface.

[0002]

2. Description of the Related Art Conventionally, trichlene, pickling, shot processing, or oxidation removal in air is known as a method for removing galvanization or oil content on the surface of an automobile.

Of these, pickling is the most common, but there is a possibility that the washing solution may cause pollution, and there are problems in running cost and securing training of workers. Further, the shot processing method also has a problem that the running cost is high and it is difficult to process shot particles to which zinc is attached.

On the other hand, in the oxidation heat removal method, oxides and the like are formed on the treated product itself, and the dezincification performance is poor. Therefore, when the iron plate or the like is melted for reuse, noro (insoluble substance) such as iron oxide and zinc oxide and zinc penetrate into the furnace wall of the melting furnace, and as a result, the life of the furnace itself is shortened. .

[0005]

As described above, the conventional cleaning method has many problems. Therefore, the present invention is
An object of the present invention is to provide a continuous cleaning method and a continuous cleaning apparatus for a solid surface without such a problem.

[0006]

According to the cleaning method of the present invention, in the process of continuously providing a closed chamber having a closed space for charging the object to be treated, and allowing the object to be treated to pass through each of the enclosed chambers in order, By individually heating and vacuuming the sealed chamber, or by heating or depressurizing by pressurizing with a non-oxidizing gas, solids and liquids adhering to the article to be treated are continuously removed. It is characterized by having done.

Further, the cleaning apparatus according to the present invention has a heating means for raising the room temperature, a condensing means for condensing solids and liquids, a decompressing means for decompressing the interior of the room through the condensing means, and a non-oxidizing interior of the room. An appropriate number of closed chambers provided with a pressurizing means for pressurizing with a gas are provided in series, and the object to be processed can be moved by opening and closing the closed doors installed in the closed chambers between the plurality of closed chambers. A vacuum substitution chamber is installed on the inlet side and the outlet side of the continuous sealed chambers, and decompression, pressurization, heating, condensation, and cooling in each of the sealed chambers can be independently controlled.

[0008]

[Operation] The objects to be treated placed in a closed space are heated in vacuum to different temperatures in each chamber, or pressurized with a non-oxidizing gas and heated to continuously deposit the deposits in each chamber. Evaporate. Evaporated substances are continuously collected by cooling and condensing in each closed space.

[0009]

EXAMPLES The embodiments of the cleaning method according to the present invention will be described more specifically. When removing water, oil, liquids and solids such as metal plating adhered to the object to be processed, load the object to be processed into each closed chamber one by one, and individually in each closed space by decompression means. After the pressure is reduced to the desired pressure, it is heated by the heating means to make it vacuum, or the pressurizing means supplies non-oxidizing gas, and the heat transfer effect of this non-oxidizing gas makes it vacuum and then adheres to the object to be treated. The metal or the like is heated to a temperature above the boiling point of the metal, water, oil or the like to evaporate the metal or the like. After that, the steam is recovered by depressurizing it in the heated state, and the condensation means provided in the middle of the recovery path,
It contains the evaporant and condenses it.

An inert gas such as nitrogen or argon is used as the non-oxidizing gas so that the product is not oxidized when the pressure inside the closed container is increased, heated or cooled. This gas is also used to circulate in the preheating chamber to preheat the processed product.

Next, an embodiment of a cleaning device used for carrying out the cleaning method of the present invention will be described with reference to the drawings. The inside of the heating furnace main body 1 is partitioned by a heat-insulating closed door to be divided into a plurality of airtight chambers. At the bottom of each chamber is a self-propelled roll for transporting a tray 60 containing the products to be processed.
A roller (color roller) is installed, the roller shaft is exposed to the outside of the room, and is attached to a self-propelled roller driving device. In each chamber, a heat insulating material is arranged outside the hollow retort.

The frontmost chamber (the left end in the figure) is the front vacuum displacement chamber 3, and sealing doors 4 and 5 are provided on the side and rear (next chamber side) thereof. Reference numeral 6 is a door cylinder that opens and closes the closed door 4, and 7 is a door cylinder that opens and closes the closed door 5.

Reference numeral 8 is a loading drive device (cylinder) for loading the tray 60 containing the article to be processed into the front vacuum displacement chamber 3, and 9 is processed in the front vacuum displacement chamber 3. It is a cylinder for sending the processed product to the next chamber.
The front vacuum replacement chamber 3 further includes a vacuum pump 10 for evacuating the chamber, and metal removed from the workpiece.
Condensing means 11 for collecting water, oil, etc. is installed, and
A gas circulation pipe 12 for supplying the preheated gas and a recovery pipe 13 for recovering the gas are connected.

Reference numeral 14 designates a first vacuum connection chamber 3 connected to the front vacuum displacement chamber 3.
The vacuum heating chamber has a closed door 16 which is opened and closed by a door cylinder 15 on the inlet side. The first vacuum heating chamber 14 has a heater 17 for heating the chamber.
And condensing means 18 and 19 which are in communication with the chamber and condense evaporants removed from the article to be treated, and condensing means 1
It has a vacuum pump 20 as a pressure reducing means for reducing the pressure inside the chamber via 8 and 19. An exhaust pipe is attached to the vacuum pump 20. Reference numeral 21 is a vacuum valve, and 22 is a filter. The first vacuum heating chamber 14 is further provided with one or a plurality of stirring fans 23 that stir the atmosphere inside the chamber.

Reference numeral 24 denotes a second vacuum heating chamber, which has substantially the same structure as the first vacuum heating chamber 14. That is, 25 is the closed door 2
The door cylinder for opening and closing 6, 6 is a heater, 28,
29 is a condensing means. Further, 30 is a vacuum pump, 31
Is a vacuum valve, 32 is a filter, and 33 is a stirring fan. In the case of the second vacuum heating chamber 24, a hermetically closed door 34 is further provided at the rear part and is opened and closed by a door cylinder 35.

Reference numeral 36 denotes a third vacuum heating chamber, which is also the same as the above, which is a closed door 37, a door cylinder 38 for opening and closing the closed door 37, condensing means 39, 40, a vacuum pump 41,
Vacuum valve 42, filter-43 and cooling fan 44
Is provided. Further, a hermetic door 45 and a door cylinder 46 are also installed on the rear side.

Reference numeral 47 is a rear vacuum replacement chamber following the third heating chamber 36, which is a closed door 49 which is driven to open and close by a door cylinder 48, a vacuum pump 50 which vacuums the interior of the chamber, a condensing means 51, and the interior of the chamber. And a carry-out drive device (air cylinder) 52 for carrying out the tray 60 that has been ejected.

Although not shown, a gas cylinder made of nitrogen or the like is arranged outside the above, and is connected to each of the vacuum heating chambers 14, 24 and 36 through a pipe equipped with a pressure regulating valve and a pressure gauge.

In the above structure, when the article to be processed put in the tray 60 is carried into the front vacuum displacement chamber 3 by the action of the carry-in drive device 8, the closed door 4 is closed by the action of the door cylinder 6. . At that time, the closed door 5 is closed and the room is closed. Therefore, the inside of the chamber is evacuated by the action of the vacuum pump 10, the nitrogen gas warmed in the rear vacuum replacement chamber 47 is supplied through the gas circulation pipe 12, and the object to be processed is preheated by the vacuum replacement. To be done.

Next, the closed door 5 is operated by the door cylinder 7, and the closed door 1 is operated by the door cylinder 15.
6 is opened, the tray 60 is pressed by the action of the cylinder 9, and is fed into the first vacuum heating chamber 14 by the self-propelled roller. When the airtight door 16 is closed there, the vacuum pump 20 is operated, and the chamber is evacuated and heated by the heater 17, so that water or oil depending on the room temperature is discharged from the article to be treated in the tray 60. Etc. are evaporated and removed.

The removed evaporate is condensed by the condensing means 18, 19.
Is taken in and condensed. The heating in the first vacuum heating chamber 14 is performed at a relatively low temperature, and mainly liquids such as water and oil are removed and recovered.

Subsequently, the closed door 26 is opened, the product to be processed is transferred to the second vacuum heating chamber 24, and after the closed door 26 is closed,
Similar to the first vacuum heating chamber 14, depressurization and heating are performed, and evaporation materials are condensed. The heating in the second vacuum heating chamber 24 is performed at a temperature higher than that in the first vacuum heating chamber 14, and the solid such as zinc plating is evaporated in vacuum.

The object to be processed is further sent to the third vacuum heating chamber 36, where it is exposed to a higher temperature to remove copper and the like. Next, the object to be processed is sent to the rear vacuum displacement chamber 47, where it is pressurized with nitrogen gas, cooled, and then transported. At that time, the heated nitrogen gas is introduced into the front vacuum displacement chamber 3 through the gas circulation pipe 12. The front vacuum substitution chamber 3 and the rear vacuum substitution chamber 47 both serve to prevent the inflow of air into each vacuum heating chamber and prevent the oxidation of the object to be processed.

[0024]

As described above, the present invention uses liquids or solids such as water, oil and metals adhered to the surface of the article to be treated, and uses special detergents and combustion flames conventionally used. It can be removed very well and in large amounts without any problems. Moreover, since it is cleaned in a closed space, there is no concern about pollution or pollution of the working environment, the running cost is low and automation is easy. Moreover, since the adhered substance is recovered by vacuum evaporation, a substance which is almost pure can be obtained, and the recovered substance itself can be reused, which is a very useful technique.

[Brief description of drawings]

1 is a front view of an embodiment of the device according to the invention.

FIG. 2 is a plan view of an embodiment of the device according to the invention.

[Explanation of symbols]

 1 Heating Furnace Main Body 3 Front Vacuum Displacement Chamber 10 Vacuum Pump 11 Condensing Means 12 Gas Circulation Pipe 14 First Vacuum Heating Chamber 17 Heater 18 Condensing Means 19 Condensing Means 20 Vacuum Pump 24 Second Vacuum Heating Chamber 27 Heater -28 Condensing means 29 Condensing means 30 Vacuum pump 36 Third vacuum heating chamber 39 Condensing means 40 Condensing means 47 Rear vacuum displacement chamber 50 Vacuum pump 51 Condensing means

Claims (2)

[Claims] 1. A closed chamber having a closed space for loading a treatment object is continuously provided, and in the process of sequentially passing the treatment object through each of the closed chambers, the closed chamber is individually heated and evacuated, Alternatively, the method for cleaning the surface of a solid is characterized in that the solid and the liquid adhering to the article to be treated are continuously removed by applying pressure with a non-oxidizing gas to heat or depressurize. 2. A heating means for raising the room temperature, a condensing means for condensing solids and liquids, a decompressing means for decompressing the inside of the room through the condensing means, and a pressurizing means for pressurizing the inside of the room with a non-oxidizing gas. An appropriate number of closed chambers provided with are connected to each other, and the objects to be processed can be moved by opening and closing the closed doors installed in each closed chamber between the plurality of closed chambers. A continuous cleaning apparatus for solid surfaces, characterized in that vacuum replacement chambers are installed on the inlet side and the outlet side, and decompression, pressurization, heating, condensation, and cooling in each of the closed chambers can be independently controlled.