JPS6151932B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) This invention is a method of producing liquid or gaseous oxygen, nitrogen, argon, etc. by liquefying and rectifying atmospheric air. The rectification tower is housed and placed inside an outer tank called a box.
A method for removing the insulation material from the outer tank of the air separation equipment when repairing or inspecting the space between the heat exchanger, piping, equipment, etc. and this outer tank, such as rock wool or perlite. and its apparatus.

(Background of the Invention) Some of the production facilities for liquid or gaseous oxygen, nitrogen, etc. include large-scale outdoor facilities installed in steel works, chemical factories, etc., and indoor facilities installed in factory buildings. When insulation materials are taken out during repairs and inspections, because they have a low specific gravity, they scatter into the atmosphere and become airborne, adhering to and accumulating on other equipment as snow, causing stains and significantly deteriorating the surrounding environment. Ta.

In addition, if it comes into contact with human skin, it can cause symptoms such as itchiness and eczema-like rash, so workers must wear protective equipment such as eyeglasses, dust-proof goggles, and a mask before removing and filling the product. Agricultural tools such as forks and portable farm equipment used for transferring grass and compost are being carried out in the narrow space where various towers, equipment, and piping are arranged inside the cold box. Work was carried out using inefficient methods such as using a conveyor to discharge the waste outside.

(Prior art and its problems) Conventionally, when the heat insulating material of such an air separation device has a relatively high specific gravity such as perlite, the heat insulating material is removed from the air separation device by air conveyance via a cyclone. There was a method and device for taking it out.

However, since a cyclone is usually equipped with a rotary valve to take out the filling material, the above method can be effectively used for materials such as pearlite which have a relatively large outer diameter and a relatively high specific gravity. Materials such as rock wool and glass fiber that have a small outer diameter and a low specific gravity have the disadvantage that they clog in the gap between the rotary valve moving parts, often causing the rotary valve to close and become unusable.

In addition, when pearlite, rock wool, etc. are taken out from the air separation device using the cyclone method, the pearlite, etc. rides on the swirling flow and collides with the inner wall of the cyclone, easily being abraded and crushed, making it impossible to reuse the pearlite, rock wool, etc. It also had the following drawbacks.

(Means for Solving the Problems) In view of the drawbacks of the above-mentioned conventional examples, the present invention provides a receiver tank equipped with a filter, pusher plate, discharge hatch, etc. between the insulation filling part of the air separation device and the suction path of the suction machine. The heat insulating material sucked from inside the outer tank of the air separation device is sucked into the receiver tank, only the intake air is sucked into the suction machine side through the filter, and the heat insulating material remaining in the receiver tank is sucked into the receiver tank by the pusher plate. The above-mentioned drawbacks are overcome by providing a method for removing heat insulating material in an outer tank of an air separation device which is discharged from the discharge hatch side, and a device used in the method.

(Example) An example of implementing the method and apparatus of the present invention will be described based on the drawings.

First, in Fig. 1, reference numeral 1 indicates the outer tank of the air separation device, 2 indicates various equipment such as a rectification column and heat exchanger necessary for producing liquid oxygen, liquid nitrogen, etc., and 3 indicates
4 is a heat insulating material such as rock wool or perlite filled in the heat insulating material filling part 3, 5 is a suction machine, and 8 is a heat insulating material filling part 3 and a suction machine 5. A receiver tank 12 is a pedestal on which the receiver tank 9 is placed.

Each part constituting the receiver tank 8 will be explained.

Reference numeral 8a designates the tank body, which is formed into a cylindrical shape as a whole.As shown in FIG. 5, a hood 31 is attached around the discharge hatch 21, which will be described later, and a fiber or resin canvas is hooked to the lower part of the hood 31. The chute 32 is installed vertically.

A discharge hatch 21 has a hatch opening/closing cylinder 27 and a hatch lock mechanism 28 as shown in FIGS. 2 and 3, and is attached to one end of the tank body 8a so as to be openable and closable.

22 is a telescopic cylinder, which is attached to the tank body 8.
It is attached to the inner wall of the other end of a.

Reference numeral 24 denotes a pusher plate, which is formed into a disc shape with approximately the same diameter as the inner diameter of the tank body 8a, and is attached to the tip of the telescopic cylinder 22.

Reference numeral 26 denotes an intake lid, which bulges outward from the peripheral wall of the tank body 8a at the position where the pusher plate slides, and the number of intake lids is not particularly limited, but
In this example, three were provided as shown in FIG.

Reference numeral 42 denotes a flexible filter, which is disposed along the lower surface of the zigzag-shaped coarse wire mesh 41 disposed in the inner space of the intake lid 26, as shown in FIG. It is supported by the boundary between the space and the space inside the tank body 8a and enters and exits both spaces in a folded state.

A suction lid 25 is attached to the tank body 8a at a position where the pusher plate 24 passes.

Reference numeral 6a denotes a suction pipe, which has a humidifying joint 9 in the middle, extends from the suction lid 25, and is connected to the inside of the air separation outer tank 1 through a manhole 7 of the outer tank 1.

As shown in FIGS. 7 and 8, this humidifying joint 9 is composed of a hollow ring body 51, and a water supply port 52 to which a water supply pipe 11 having a water supply valve 10 is connected is opened on the outer periphery of the hollow ring body 51. A large number of small water supply holes 53 are radially bored in the inner periphery of the hollow ring body 51 and are oriented toward the center within the suction pipe 6a.

Reference numeral 6b denotes an intake pipe, which has a vacuum release valve 6c, extends from the suction lid 26, and communicates with the suction machine 5.

A loading space 12a into which the loading platform of the truck 13 enters is held below the pedestal 12.

An example of a method for taking out heat insulating material using the above device will be described. As a means for taking out heat insulating material, there are cases in which the heat insulating material is reused and cases in which it is discarded. First, an example of taking out the heat insulating material for reuse will be described.

By operating the suction device 5, a suction path is formed from the insulation material filling part 3 in the outer tank 1 of the air separation device through the suction pipe 6a, the tank body 8a, and the intake pipe 6b, and the insulation material 4 in the insulation material filling part 3 is formed. is sucked into the tank body 8a through the suction pipe 6a and the suction lid 25, and the heat insulating material 4 sucked into the tank is separated by a filter 42, and only the intake air inside the tank body 8a is passed through the filter 4.
2. It is sucked into the suction device 5 through the wire mesh 41 and the intake pipe 6b, and released into the atmosphere from the discharge port 5b as exhaust gas.

After opening the discharge hatch 21, the insulation material 4 remaining in the tank body 8a is discharged into the chute 32 by the pusher plate 24 as shown in FIG. Fill the bag 34 by shaking and adjusting the filling amount. If necessary, the vacuum release valve 6c is opened with the hatch 21 closed before discharge, and the vacuum pressure inside the tank body 8a is used to connect the intake pipe 6c to the vacuum release valve 6c.
Air is caused to flow back into the interior of b, and the filter 42 is closed to the intake lid 2.
The filter 42 is hung from inside the tank body 8a in a folded state, and when the pusher plate 24 slides during discharge, the peripheral edge of the pusher plate 24 scrapes off the deposits on the surface of the filter 42.

Next, when discarding the heat insulating material 4, the water released by the water supply valve 10 provided in the middle of the suction pipe 6a is sucked into the receiver tank 8 together with the insulating material 4, and then the water is sucked into the receiver tank 8 inside the tank body 8a. The compression operation is repeated several times by the pressing force of the pusher plate 24 due to the expansion of the 22, and the compression is performed until a set constant pressure is reached. After raising the receiver tank 8, the discharge hatch 21 provided on one side of the receiver tank 8 is opened, and the pusher plate 24 is operated to push out the receiver tank 8, and as shown in FIG. and transport it to the dumping site.

Further, if necessary, the vacuum release bubble 6c is opened in the same manner as described above to scrape off the deposits on the surface of the filter 42.

Conventionally, workers could only load around 2,500 kg by stepping onto a raised 10 m ^3- load platform for transporting light objects, but with this invention, by adding around 15% moisture, the load can be increased to around 7,500 kg. It is now possible to double the load.

Furthermore, although the suction pipe 6a is shown inserted through the upper manhole 7 of the air separation device outer tank 1 in the figure, it is possible to sequentially use the lower manhole (not shown) depending on the discharge amount of the heat insulating material 4. You can also do this.

In addition, by making the suction port side of the suction pipe 6a thinner (250 mm) and the tank body 8a side thicker (300 mm), the flow rate on the suction port side becomes faster and easier to suction, and since the tank body 8a side is made thicker, the flow rate decreases. Deterioration of the heat insulating material due to impact with the inner wall of the tank body, etc. can be further prevented.

In addition, by making the suction pipe 6a from a transparent material so that the inside can be seen through, or by providing a transparent part at least in the vicinity of the tank body 8a of the suction pipe 6a, after the tank body 8a is filled with the heat insulating material, The accumulation in the suction tube 6a can be visually observed.

A foreign object removing device 15 may be provided in the suction tube 6a to remove foreign objects such as bolts.

By making the cylinder 22 of the receiver tank 8 a multistage hydraulic cylinder, the inside of the tank body 8a can be effectively utilized.

Furthermore, by connecting the valve and the pusher plate chamber with piping or by providing a valve to break the vacuum in the pusher cylinder chamber, the gas can be transferred from the gap between the rubber packing around the pusher plate and the inner wall of the tank to the pusher cylinder chamber. This prevents insulation from leaking.

If there is no communication piping, when suction work is stopped,
The degree of vacuum in the pusher cylinder chamber becomes higher than the degree of vacuum in the insulation material storage chamber, and the insulation material leaks out.

(Effects) As explained above, the method for extracting heat insulating material from an air separation device according to the present invention involves sucking up heat insulating material such as rock wool or perlite in the outer tank of the air separation device using a suction machine. In the extraction method, a receiver tank is placed between the suction path between the insulation material filling part in the outer tank of the air separation device and the suction machine, and this receiver tank is attached to the tank body and one end of this tank body so that it can be opened and closed. a discharge hatch; a telescoping cylinder attached to the inner wall of the other end of the tank body;
A pusher plate attached to the tip of the telescopic cylinder and formed to have approximately the same diameter as the inner diameter of the tank body; an intake lid that bulges outward from the circumferential wall of the tank body at the position where the pusher plate slides; a flexible filter that is supported at the boundary between the intake lid internal space and the tank body space and enters and exits the two spaces in a folded manner; a suction lid that is attached to the tank body peripheral wall at a position where the pusher plate passes; A suction pipe extending from the suction lid and communicating with the inside of the air separation device outer tank, an intake pipe extending from the suction lid and communicating with the suction machine, and a vacuum provided in the intake pipe. The insulating material is sucked into the receiver tank from the outside tank of the air separation device through the suction pipe, and only the intake air is sucked into the suction machine side through a filter, and the insulating material remaining in the receiver tank is pumped out. Since this is a method for taking out a heat insulating material from an air separation device, which is characterized in that the material is discharged from the discharge hatch side by pressing a plate, the following effects are achieved.

In other words, the insulation material can be effectively taken out from inside the outer tank of the air separation device without being scattered into the atmosphere, and the insulation material can also be reused by preventing wear and tear of the insulation material. The heat insulating material adhering to the filter surface can also be scraped off, and the ventilation function of the filter can be easily maintained.

Further, in the method for taking out a heat insulating material from an air separation device according to the present invention, particularly the suction pipe has a water supply device,
In the case where the suction of the heat insulating material through the suction pipe is performed while humidifying the heat insulating material by the water supply device, and the discharge is performed after the heat insulating material is compressed by the pusher plate, the heat insulating material is The material can be loaded onto the truck in a compressed and compact state, improving the loading efficiency of the truck when disposing of the insulation material.

Further, the device for taking out the heat insulation material of the outer tank of the air separation equipment according to the present invention includes a manhole provided in the outer tank of the air separation equipment, a receiver tank, a pedestal on which the receiver tank is placed, and a suction machine, The receiver tank consists of a tank body, a discharge hatch attached to one end of the tank body so as to be openable and closable, a hood located around the discharge hatch and attached to the tank body, and a chute hanging vertically below the hood. , a telescoping cylinder mounted on the inner wall of the other end of the tank body, a pusher plate mounted on the tip of the telescoping cylinder and formed to have approximately the same diameter as the inner diameter of the tank main body, and a sliding passage position of the pusher plate. An intake lid bulging outward from the peripheral wall of the tank body, a flexible filter supported by the boundary between the space inside the intake lid and the space inside the tank body and entering and leaving both spaces in a folded state; a suction lid attached to the peripheral wall of the tank body at a position where the shear plate passes; a suction pipe extending from the suction lid and communicating with the air separation device outer tank; and a suction pipe extending from the suction lid and connected to the outer tank of the air separation device. This is because it is a heat insulating material extraction device for an air separation device, which consists of an intake pipe that communicates continuously with the machine and a vacuum release valve provided on this intake pipe, and the pedestal has a space for entering the truck loading platform below. It has the following effects.

In other words, not only can the insulation material be efficiently taken out from the outer tank of the air separation device without scattering it into the atmosphere, but even when the insulation material is discharged from the receiver tank for the purpose of reusing the insulation material, The required amount can be taken out in the state that it is scattered into the atmosphere, and when the insulation material is discharged, the insulation material that has adhered to the filter surface can be scraped off, making it possible to easily maintain the ventilation function of the filter. The insulation material can be easily transferred to the truck bed while it is infiltrated.

[Brief explanation of the drawing]

The drawings are an explanatory diagram of the method of the present invention and an embodiment of the apparatus according to the present invention used in the method of the present invention. Figure 3 is a side view of the humidifying joint, Figures 4 and 5 are side views showing examples of its use, Figure 6 is a partially enlarged cross-sectional view of the receiver tank, Figure 7 is a vertical front view of the humidifying joint, and Figure 8 is a side view of the humidifying joint.
The figure is its plan view. 1...Air separation device outer tank, 3...Insulating material filling part, 4
...Insulating material, 5...Suction device, 5a...Suction port, 6...Suction/intake pipe, 6a...Suction pipe, 8...Receiver tank, 10...Water supply valve, 21...Discharge hatch, 2
2... Cylinder, 24... Pusher plate, 42
...filter.

Claims (1)

[Scope of Claims] 1. In a method for removing heat insulating material from an air separation device in which a heat insulating material such as rock wool or perlite in the outer tank of the air separation device is sucked by a suction device, A receiver tank is arranged between the suction path of the suction machine, and this receiver tank includes a tank body, a discharge hatch attached to one end of the tank body so as to be openable and closable, and an expandable and retractable hatch attached to the inner wall of the other end of the tank body. A cylinder, a pusher plate that is attached to the tip of the telescopic cylinder and has a diameter that is approximately the same as the inner diameter of the tank body, and an intake lid that bulges outward from the circumferential wall of the tank body at the position where the pusher plate slides through. a flexible filter that is supported at the boundary between the intake lid space and the tank body space and moves in and out of both spaces in a reciprocating manner; and a flexible filter that is attached to the tank body peripheral wall at a position where the pusher plate passes through. a suction lid; a suction pipe extending from the suction lid and communicating with the air separation device outer tank; an intake pipe extending from the suction lid and communicating with the suction machine; The insulation material is sucked into the receiver tank from the outside tank of the air separation device through the suction pipe, and only the intake air is sucked into the suction machine side through a filter, and the insulation remaining in the receiver tank is sucked into the receiver tank. A method for taking out heat insulation material from an air separation device, characterized in that the material is discharged from a discharge hatch side by pressing a pusher plate. 2. The suction pipe has a water supply device, the suction of the heat insulating material through the suction pipe is performed while the heat insulating material is humidified by the water supply device, and the discharge is performed while the heat insulating material is compressed by a pusher plate. A method for removing a heat insulating material from an air separation device according to claim 1, which is performed after the air separation device is removed. 3 Consisting of a manhole provided in the outer tank of the air separation device, a receiver tank, a pedestal on which the receiver tank is placed, and a suction machine, the receiver tank is attached to a tank body and one end of the tank body so that it can be opened and closed. an attached discharge hatch, a hood located around the discharge hatch and attached to the tank body, a chute vertically installed below the hood, and a telescopic cylinder attached to the inner wall of the other end of the tank body; A pusher plate attached to the tip of the telescopic cylinder and formed to have approximately the same diameter as the inner diameter of the tank body; an intake lid that bulges outward from the circumferential wall of the tank body at the position where the pusher plate slides; a flexible filter that is supported at the boundary between the intake lid space and the tank body space and enters and exits the two spaces in a folded manner; and a suction lid that is attached to the tank body peripheral wall at a position where the pusher plate passes through. , a suction pipe extending from the suction lid and communicating with the inside of the air separation device outer tank; an intake pipe extending from the suction lid and communicating with the suction machine; and a suction pipe provided in the suction pipe. 1. A heat insulating material extraction device for an air separation device, which comprises a vacuum release valve, and the pedestal has a space below which a truck's loading platform enters.