JPH0435202B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for removing fluid within a machine in an upper liquid collection type pressurizing machine. When changing the excess liquid in an upper liquid collection type pressurizing machine, over-operation must be stopped while the liquid and stock liquid are both filled inside the machine, and conventionally, the drain valve at the bottom of the machine is used. Even if an attempt was made to recover only the stock solution by opening the tank, the liquid would flow back into the stock solution storage tank and peel off the slag, making it impossible to recover a clean stock solution. In the case of expensive stock solutions such as plating solution, it is not only economically impractical to dispose of the liquid in this way, but also because the slag that adheres to the surface of the material is mostly interposed in the pre-coat layer, so it is especially important to dispose of the liquid inside and outside the material. If the differential pressure is increased, it will easily peel off and fall in the stock solution storage chamber, and the material will have to be pre-coated every time the stock solution is changed, which is extremely time consuming and causes problems in terms of operational economy. Ta. Therefore, the present invention is an invention that makes it possible to recover the stock solution inside the machine as well as the liquid while preventing the flaking and falling phenomenon of the slag by preventing the generation of differential pressure between the inside and outside of the material in the stock solution storage chamber. be.

In the present invention, when the operation is stopped, the stock solution supply valve is closed, pressurized gas is supplied to the stock solution storage tank, the stock solution is forced to pass through to the bottom end of the material, and after being recovered as a liquid from the liquid discharge valve, a small amount of stock solution remains. A method and device for removing undiluted liquid from a drain valve, and furthermore, in the above device, a liquid recovery tube with a recovery tube facing the lower end of the interior of the material leading to the liquid recovery valve is additionally installed in the liquid intake chamber. As a result, the material and the liquid remaining in the liquid intake chamber after being forced to pass by the pressurized gas are separately pushed up and collected.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 3 of the attached drawings. Reference numeral 1 denotes an upper liquid collection type pressurizing machine body, and a drain valve is installed at the bottom of the intermediate partition plate 2. The excess stock solution storage tank 3 is equipped with a stock solution supply valve A and a stock solution supply valve A, and the liquid discharge valve E is located above.
A single or plural pieces of material 5 are vertically supported from the liquid intake chamber 4 above the partition plate 2 into the excess liquid storage tank 3. C is a pressurized gas valve provided in the excess stock solution storage tank 3. The air valve D, like the pressurized gas valve C, shall be installed in the raw liquid storage tank 3, and the air valve D shall be installed in the liquid intake chamber 4.
In addition to the liquid discharge valve E, an atmosphere release or pressurization valve F is also provided. The material 5 is composed of a perforated core material 6, such as a tube whose entire surface is perforated, as shown in FIG. 6, so that liquid can be ingested from any part of the outer circumferential surface, and a cloth 7 is coated on the surface of the perforated core material 6. Use porous materials such as stainless steel.

In the above-mentioned upper liquid collection type pressurizing machine main body 1,
The over-operating state is as shown in Figure 1, in which all valves are closed except for the stock solution supply valve A and the liquid discharge valve E, which are open.To stop the operation, the stock solution supply valve A is closed, and then the stock solution supply valve E is closed. When the pressurized gas valve C is opened, the stock solution in the stock solution storage tank 3 becomes a liquid due to the pressurized gas and is guided to the liquid discharge valve E even though the stock solution supply valve A is closed. Forced overflow by pressurized gas is the second
The condition progresses through the state shown in the figure and finally reaches the state shown in FIG. 3, and when the raw liquid level reaches the lowest end of the material 5, the forced overfunction stops. By continuing to pressurize the slag adhering to the surface of the material 5 even during the situation changes shown in FIGS. 1 to 3, it is possible to prevent the slag from peeling off. The residual liquid in the state shown in FIG. 3 is drained by opening the drain valve B while maintaining the pressure difference between the inside and outside. Next, a liquid recovery method and apparatus will be described as a second embodiment with reference to FIG. 4 of the accompanying drawings.

In contrast to the configuration of the first embodiment, a liquid recovery tube collection section 8 is additionally installed in the liquid intake chamber 4, with the recovery tube 9 facing up to the lower end of the inner space of the material 5 leading to the liquid discharge valve E. According to the first embodiment, the undiluted solution in the undiluted solution storage tank 3 becomes a liquid and is taken out from the discharge valve E. However, it goes without saying that the remaining liquid in the material 5 and the overdose chamber 4 cannot be recovered by the above-mentioned method for recovering the undiluted solution. By opening the liquid recovery valve G and supplying pressurized gas to the raw liquid storage tank 3 at a very low pressure, for example, 0.1 to 1.2 Kg/cm ² G as an experimental value,
The inside of the tank becomes pressurized, and the undiluted solution is directly pressurized and the undiluted solution is forced to pass through, resulting in the state shown in Fig. 4. The liquid intake chamber 4 is closed to the recovery pipe 9, as there is no escape route due to the increased liquid pressure. The liquid can be collected to the outside via the collection part 8 until the liquid reaches the lowest part of the material 5.

After that, by supplying pressurized gas whose gas pressure has been increased to, for example, about 0.5 kg/cm ² G, the gas gradually flows into the liquid intake chamber 4, and the chamber 4 is filled only with gas, and the liquid is filled with gas. As shown in FIG. 5, the pressure releases the recovery tube 9 and the recovery tube collecting section 8, and the liquid is recovered to the outside. In this case, the stock solution is the lowest part of the material 5 when the very low pressure gas is supplied. Then, by opening the drain valve B and draining the remaining stock solution while maintaining the internal and external pressure difference, the stock solution and liquid inside the machine can be completely recovered.

Next, in the case of extremely low pressure air supply described above, by supplying pressurized gas of about 0.5 kg/cm ² G directly to the stock solution from the beginning, the stock solution is forcibly passed through, and the gas is transferred to the liquid intake chamber. 4, and as a result of both of the above-mentioned phenomena, the liquid passes through the recovery pipe 9 and recovery tube collection section 8, and is recovered to the outside from the liquid recovery valve G. As explained above, by providing the atmosphere release or pressurizing valve F, when this valve F is opened and the liquid intake chamber 4 is pressurized, the recovery work from the liquid recovery pipe collection section 8 can be speeded up. becomes. However,
The condition is that the pressurized gas pressure is set lower than the pressurized gas pressure of the stock solution storage tank 3. The above-mentioned air bleed valve D functions to bleed air from the stock solution storage tank 3 when air is blown to the atmosphere or from the pressurized valve F for cleaning in the above-mentioned permeator.

As described above, in the method and device for removing the liquid in the machine body made of excess stock solution and liquid of the present invention, pressurized gas is continuously supplied to the excess stock solution storage tank 3 to constantly maintain the pressurized state. The slag deposited on the surface of the material 5 during forced filtration does not peel off and fall, and the undiluted solution that remains in the deposition position can be recovered.In addition, by adding a liquid collection pipe collection part 8, the liquid can be removed. This is a useful invention that can completely eliminate the force majeure losses that occur in the prior art due to switching work when changing expensive overstock solutions such as plating solution by achieving a recovery effect almost completely. It is preferable to select operating values for the pressure of the pressurized gas, the diameter of the liquid recovery tube collecting section 8, etc. through tests based on the functional specifications of the filter main body 1.

[Brief explanation of drawings]

1 to 3 are longitudinal sectional views showing the first embodiment, FIGS. 4 and 5 are the same figures showing the second embodiment, and FIG. 6 is a sectional view of the material. 1... Main body of the machine, 2... Intermediate partition plate, 3...
Excess liquid storage tank, 4...Liquid intake chamber, 5...
Material, 6... Perforated core material, 7... Cloth, 8... Liquid recovery tube gathering part, 9... Recovery pipe, A... Stock solution supply valve, B... Drain valve, C... Pressurized gas valve, D... ...Air bleed valve, E...Liquid discharge valve, F...Atmospheric release or pressurization valve, G...Liquid recovery valve.

Claims (1)

[Scope of Claims] 1 The lower part of the intermediate partition plate 2 is an excess stock solution storage tank 3 which is provided with a drain valve B and a stock solution supply valve A at the lowest part, and a liquid discharge valve E is connected to the upper part through a pipe line. A liquid intake chamber 4 is provided, and one or more pieces of material 5 are vertically supported from the liquid intake chamber 4 into the excess stock solution storage tank 3, and a pressurized gas valve C is provided in the excess stock solution storage tank 3. In the main body of the upper liquid collecting type pressurizing machine, in case of over-operation in which the raw liquid supply valve A and the liquid discharge valve E are all closed except in the open state,
The stock solution supply valve A is closed, and then the pressurized gas valve C is released to carry out forced overpressure until the stock solution level reaches the lowest end of the material 5, and then the drain valve B is released to supply the stock solution. The remaining liquid is recovered, and the lower end of the recovery tube 9 is exposed to the inner space of the material 5, and the liquid recovery tube gathering part 8 communicates with the upper end of the recovery tube 9.
Then, the liquid recovery valve G connected via a pipe line from the outside is released, and a pressurization valve connected to the pipe line between the liquid discharge valve E and the liquid intake chamber 4 is opened to the atmosphere or pressurized. In the upper liquid collection type pressurizing machine, the liquid in the liquid intake chamber 4 is recovered to the outside by opening the valve F and pressurizing the liquid intake chamber 4. How to remove fluids inside the aircraft. 2 The lower part of the intermediate partition plate 2 is an excess stock solution storage tank 3 equipped with a drain valve B and a stock solution supply valve A at the lowest part, and the upper part is a liquid intake chamber 4 equipped with a liquid discharge valve E via a conduit. An upper liquid collection type pressurizing machine in which one or more pieces of material 5 are vertically supported from the liquid intake chamber 4 into the excess stock liquid storage tank 3, and a pressurized gas valve C is provided in the storage tank 3. In the main body, there is a pressurizing valve F for opening to the atmosphere or pressurizing, which is provided in communication with the pipe line between the liquid discharge valve E and the liquid intake chamber 4, and a pressurizing valve F that communicates with the pipe line between the liquid discharge valve E and the liquid intake chamber 4, and a pressurizing valve F for opening to the atmosphere or pressurizing the liquid, and a pressure valve F that communicates with the pipe line between the liquid discharge valve E and the liquid intake chamber 4. It includes a recovery pipe 9, a liquid recovery tube collection part 8 provided in communication with the upper end of the recovery pipe 9, and a liquid collection valve G provided in a pipe line from the outside communicating with the liquid collection pipe collection part 8. A device for removing fluid inside the machine in an upper liquid collection type pressurizing machine.