JPH0470941B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a high-pressure container having a valve (hereinafter referred to as a liquid supply valve) for supplying liquid to a high-pressure operation chamber, and in particular, a high-pressure container having high-pressure sealing properties. The present invention relates to a high-pressure container having a compact liquid supply valve that can supply liquid efficiently and in a short time.

[Prior Art] Generally, when supplying liquid to the high-pressure operation chamber of a high-pressure container, a liquid supply valve is interposed in the liquid supply pipe connected to the high-pressure operation chamber, and the liquid supply valve is opened. A liquid is introduced into the operation chamber, and when the introduction is completed, the liquid supply valve is closed and a pressure increasing operation is started. In this case, since the high-pressure operation chamber is in a sealed communication state with the liquid supply valve, the pressurizing force in the high-pressure operation chamber is directly transmitted to the liquid suction pipe and the liquid supply valve. So for example 1000
The liquid supply pipe to a high-pressure container that exceeds the atmospheric pressure must be made of a fairly thick wall, and the material itself for the liquid supply valve must be thickened, and the high-pressure seal structure and joint structure must be complicated. Because of this, it has no choice but to become something large. An example of such a situation regarding a liquid supply system of a high-pressure crystallizer (high-pressure container) will be explained as follows. A high-pressure crystallizer is a system in which a solid-liquid mixed slurry (sometimes a still liquid) consisting of multiple components is introduced into a high-pressure operation chamber, and high pressure is applied to the slurry with the exit side pipe of the filter closed. This is a device that promotes crystallization of components. In this high-pressure crystallization separation process, some liquids to be treated may be easily separated, so it is necessary to cool the liquid to be treated in advance to form a certain amount of crystals as a pretreatment for pressure separation. For example, m-cresol
In separating a mixture of 80% p-cresol and 20% p-cresol, it is necessary to cool the mixture to 13 to 16°C in advance to form a slurry with crystals present in the solution.

The slurry obtained by preliminary crystallization is sent to a high-pressure crystallizer. When transporting slurry, it is desirable that the transport pipe be larger than its diameter in view of pressure loss. On the other hand, in pressurized separation operation, it is usually 1000 ~
A high pressure of 2000Kgf/ ^cm2 is applied, and when pressurizing, high pressure is applied to the stop valve (slurry supply valve) installed in the middle of the slurry supply pipe (transport pipe) connected to the high-pressure container, so the slurry supply The pipe must be thick-walled, and the slurry supply valve will be large.

To explain this using a specific example of equipment shown in Figure 1 (longitudinal cross-sectional view of main parts), the above-mentioned mixed slurry is
The slurry is introduced into the high-pressure operation chamber 1 from V5 via the liquid supply pipe 5 installed in the lower block ₄ , and high pressure is applied to the slurry with the drain valve _V6 closed. When a state in which crystals of a specific component and liquids of other components are mixed is obtained by this high-pressure operation, the drain valve V ₆ is opened and pressure is continuously applied by the piston 3 under the solid-liquid coexistence state. The specific component is separated by discharging the liquid component to be removed from the filter through the drain passage 8 of the lower block 4, the drain pipe 6, and the drain valve _V6 . Then, the lid of the high-pressure operation chamber 1 is opened or the outer operation chamber 1 itself is disassembled, and the solid specific components remaining in the operation chamber 1 are taken out under atmospheric pressure and used as a product.
Various methods can be used to remove the solid from the high-pressure container depending on the characteristics of the substance.

[Problems to be Solved by the Invention] Even in such a high-pressure crystallizer, during pressurization, the interior of the high-pressure operation chamber 1, the liquid supply pipe 5, and the liquid supply valve _V5 are in sealed communication, and the liquid supply Pipe 5 and liquid supply valve
Since the pressurizing force is directly applied to _V5 , it is necessary to make the lower block 4 thick as described above. Moreover, since the liquid that communicates with the liquid supply pipe 5 is often in the form of a slurry, the liquid supply pipe 5 should have a diameter as large as possible in order to minimize the pressure drop during introduction and ensure prompt introduction. Because of the fact that the lower block is preferred, increasing the thickness of the lower block becomes an even more serious problem. Also liquid supply valve
In addition to the problem of increasing the size of the _V5 ,
High-pressure containers having a normal valve structure have problems with pressure resistance and poor sealing performance when loaded with high pressure.

[Means for Solving the Problems] Under these circumstances, the present invention has made extensive studies to provide a high-pressure container that has good high-pressure sealing properties and can supply liquid (including slurry) in a short time. The configuration of the present invention is such that a concave seat is provided on the inner wall surface of the high-pressure operation chamber, and a through passage for inserting the rod portion is communicated with the concave seat. A valve opening/closing member is assembled from a head portion which can be freely installed and removed within the valve and is brought into close contact with the bottom surface of the concave seat when installed, and a rod portion which is connected to the head portion and is loosely inserted into the through passage. During liquid supply, the head section moves to the inside of the high pressure operation chamber by the upward movement of the rod section to supply liquid, and at the same time, during high pressure operation, the head section is moved by the downward movement of the rod section. By attaching it to the concave seat and supporting the pressure applied to the upper surface of the head part with the concave seat, it is possible to maintain the valve opening/closing member while ensuring sealing between the rod part insertion passage and the high-pressure operation chamber. The main point lies in the following points.

[Operations and Examples] The configuration and effects of the present invention will be explained below with reference to the drawings of the embodiments.

FIG. 2 is a sectional view of the main parts when the present invention is applied to a high-pressure crystallizer, and the liquid supply valve V has a so-called check valve structure, and the high-pressure operation chamber main body (hereinafter simply referred to as the main body) The valve seat 23 (concave seat) provided at the center of the inner wall surface of the lower block 22 screwed into the lower block 21 is combined with the valve stem 24 consisting of a head 24a and a rod 24b, and the valve stem 24 is attached to the lower block 22. It is arranged so that it can reciprocate (in the figure, it moves up and down) within a liquid supply passage 25 that is provided in communication with the valve seat 23. Supply and supply slurry, etc. (hereinafter simply referred to as slurry) by opening and closing valves.
A stop takes place.

A more detailed explanation is as follows.

The bottom surface 23a of the valve seat 23 is formed into a conical shape, and at the center of the bottom surface 23a there is a horizontally extending main body that extends directly below the bottom surface 23a and is bent at a substantially right angle halfway inside the block 22. A through hole opened to the outside of 21 is communicated with each other to form a liquid supply passage 25 .

Also, the bottom surface 24a ₁ of the head 24a on the valve stem 24
is formed into a conical shape that matches the conical bottom surface 23a of the valve seat 23, and an O-ring 27 is installed in a ring groove 26 provided on the side peripheral surface _24a2 . Further, a rod 24b is screwed into the center of the lower surface of the head 24a, extends directly below the center of the liquid supply passage 25, penetrates the passage 25, and projects to the outside of the lower block 22 via the seal portion 28.

Also, the rod 2 protrudes to the outside of the lower block 22.
A reciprocating mechanism (not shown) is connected to the lower end of 4b, and the reciprocating mechanism moves the valve stem 2.
4 is raised or lowered. Note that various types of reciprocating mechanisms such as air cylinders, hydraulic cylinders, etc. can be considered, and any of them can be adopted.

When operating a high-pressure crystallizer incorporating the liquid supply valve V configured as described above, the procedure for supplying a mixed slurry consisting of multiple components into the main body 21 and performing a high-pressure crystallization operation is as follows. That's right.

The liquid supply valve _V5 is opened and the slurry is introduced into the liquid supply passage 25, and is allowed to reach the bottom surface _24a1 of the head. If the equipment is running continuously without stopping temporarily, there is no need to operate the liquid supply valve _V5 .
It should be kept open at all times. Next, when the reciprocating mechanism is driven to raise the valve stem 24, a gap is created between the outer peripheral surface of the head 24a and the inner peripheral surface of the valve seat 23, and this gap is connected to the liquid supply passage 25 and the main body 21.
Since it communicates with the interior, the slurry is introduced into the body 21. Furthermore, when the valve stem 24 rises, the head 2
Since the slurry supply pressure operates on the bottom surface _24a1 of the head 24a, when designing the output of the reciprocating mechanism, the size should be large enough to compensate for the fact that the head 24a cannot be pushed up enough by the slurry supply pressure alone. It is sufficient to consider. Also, when closing the valve, since the pressurizing force acts from the inner surface, it sometimes automatically acts in the direction of closing the valve, so it is the same as when opening the valve.

When a predetermined amount of slurry is introduced into the main body 21, the valve stem 24 is lowered, the head bottom surface _24a1 comes into contact with the valve seat bottom surface 23a, and the inside of the main body 21 and the liquid supply passage 2 are brought into contact.
5 and applies high pressure to the slurry in the main body 21 to promote crystallization of specific components. The bottom of the valve seat is tapered to ensure a stable centering when the valve is closed.

By the way, the pressure during high pressure operation is applied to the upper surface of the head 24a of the valve stem 24, acts on the contact surface between the head bottom surface _24a1 and the valve seat bottom surface 23a, and the main body 2
It supports the high pressure inside 1 and provides a reliable sealing effect. The area of the relevant contact surface (i.e. seal area)
is preferably as small as possible from the viewpoint of increasing the pressure per unit area. In addition, at the beginning of the pressurizing operation, sufficient surface pressure is not generated on the abutment surface, so that the slurry in the main body 21 is connected to the slurry in the liquid supply passage 25, and the There is a possibility that pressure may be transmitted into the liquid supply passage 25, but in this regard, the O-ring 27 is arranged above the contact surface, and the O-ring 2
7, the problem is solved by perfecting the sealing performance against the initial pressure at the start of high-pressure operation.

Therefore, even during pressurization operation, the high pressure inside the main body 21 does not apply to the liquid supply passage 25, the liquid supply pipe 5, and the liquid supply valve _V5 , so that the lower block 22 and the liquid supply pipe 5 can be made thicker. In addition, there is no need to increase the size of the liquid supply valve _V5 , and the liquid supply system of the high-pressure crystallizer can be designed compactly using ordinary piping parts near normal pressure.

Furthermore, the above-mentioned structure of the liquid supply passage 25 and the valve seat 23 can ensure a sufficiently large diameter, and there is almost no risk of pressure drop drop during slurry supply.
Further, the slurry can be supplied into the main body 21 in a short time, and the processing effect can be improved.

The above embodiment is merely a representative example of the present invention and does not limit the present invention, and the design of the valve seat, valve stem, etc. may be modified as appropriate within the scope of the above-mentioned spirit. It is. For example, when the valve stem 24 is raised to supply slurry into the main body 21, although the rod 24b is supported by the seal portion 28, it becomes cantilevered from the relatively long valve stem 24. Therefore, it is recommended that a guide metal 29 for centering the rod 24b be provided in the middle of the liquid supply passage 25, as shown in FIG. 3 (enlarged sectional view of the main part).
However, it goes without saying that a slurry passage hole 29a must be formed through which the slurry can easily pass.

Furthermore, the liquid supply valve V is not limited to the lower block 22, but can also be incorporated into the piston 3 or the main body 1 shown in FIG.

Furthermore, in the above description, the present invention is applied to a liquid supply system of a high-pressure crystallizer, but it is needless to say that the present invention is not limited to this. Can be applied.

Moreover, although the above description has focused on an example of application to a slurry liquid supply valve, the present invention is not limited to this, and can be similarly applied to a case where a large amount of liquid is supplied to a high-pressure container.

[Effects of the Invention] Since the present invention is configured as described above, it has good high-pressure sealing properties and can supply liquid (including slurry) in a short time.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the main parts illustrating a high-pressure crystallizer, Fig. 2 is a longitudinal cross-sectional view of the main parts when the present invention is applied to a high-pressure crystallizer, and Fig. 3 is an explanation of a modification of the present invention. It is a diagram. 1, 21... High pressure operation chamber main body, 4, 22... Lower block, 23... Valve seat, 24... Valve stem, 24
a...Head, 24b...Rod, 25...Liquid supply passage, 27...O ring, 28...Seal portion, 2
9...Guide metal.

Claims (1)

[Claims] 1 In addition to providing a concave seat on the inner wall surface of the high pressure operation chamber,
The concave seat communicates with a through passage for inserting the rod part,
A valve opening/closing member comprising a head portion that can be installed and removed within the recessed seat and that is brought into close contact with the bottom surface of the recessed seat when installed, and a rod portion that is connected to the head portion and loosely inserted into the through passage. When supplying liquid, the head section moves to the inside of the high-pressure operation chamber by the upward movement of the rod part to supply liquid, and at the same time, during high-pressure operation, the head part moves to the inside of the high-pressure operation chamber and supplies liquid by the downward movement of the rod part. By attaching the head part to the concave seat and supporting the pressurizing force applied to the upper surface of the head part with the concave seat, the valve opening/closing member is held and the through passage for the rod part insertion and the high pressure operation chamber are sealed. A high-pressure vessel characterized by being configured to ensure the following: