JP3136377B2 - Trap for collecting solids - Google Patents

Abstract

PURPOSE:To provide a trap for solid capture which can precipitate solids in sublimate gas with high efficiency for concentrated capture and facilitate maintenance with a simple structure. CONSTITUTION:This is a trap 1 for solid capture which is installed on the exhaust side of a pump for sublimate gas and captures solids precipitated from the sublimate gas discharged from the pump. This trap 1 is provided with a spiral member 30 stored in the casing 10, in which a spiral passage A is also formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to a solid capturing collection trap attached to the exhaust side of the pump to handle the sublimable gas.

[0002]

2. Description of the Related Art When a sublimable gas (that generates a solid content from a gas by a change in pressure-temperature state) is compressed and discharged by a pump, the sublimable gas is compressed. As a result, the temperature becomes high and high. However, as shown in FIG. 2, when the sublimation gas has the same pressure,
It has the property that solids precipitate out when the temperature drops. For this reason, the sublimable gas discharged from the pump is cooled by the outside air of the exhaust-side pipe, solids are deposited, adhere to the pipe, and close the pipe in a relatively short time. was there.

[0005] To Collection capturing solids exhaust pipe not clog, but also conceivable to increase the length by increasing the diameter of the pipe, in this case becomes large space for piping The maintenance is also difficult.

On the other hand, by a predetermined portion of the pipe is cooled with water or the like, a method of collecting capturing intensively precipitated the solids are also contemplated. According to this method, the space for piping does not increase. However, in this case, a cooling device is required, the structure becomes complicated, and its maintenance is also required.

[0005] The present invention has been made in view of the above, an object of the can centrally collection efficiency may precipitated solids sublimation gas, yet easy maintenance structure is simple It is to provide a solid catching collection for the trap.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a trap for collecting solids according to the present invention has a cylindrical casing.
A spiral member with a spiral plate inside the thing is stationary
A spiral passage is provided in the casing by being detachably accommodated in the casing, and this is attached to the exhaust side of a pump that handles sublimable gas.

[0007]

[Acting] sublimable gas was compressed with high temperature and high pressure by the pump, he Shirubebi this solid capturing current for the trap are ejected by moving while swirling the passage. During this time, the sublimable gas is cooled by the outside air and solids are precipitated. Since the solid content is heavier and swirling than the gas, a centrifugal force is applied to the solid content, and the solid content adheres to only one surface, not the entire inner peripheral surface of the cross section of the passage. Therefore, unlike the case where the sublimable gas is passed only through the cylindrical pipe, the solid content does not adhere almost uniformly to the entire inner peripheral surface of the pipe. The period in which the passage is closed by the attachment of the solid matter can be extended as compared with the case of only the case. Further, since the passage is helical, the length of the passage can be made longer than in the case of only a pipe, the distance over which solids can be deposited can be increased, and solids can be efficiently deposited.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. Figure 1 is a side sectional view showing a solid capturing collection trap according to the present invention. The solid capturing current trap 1 as shown in the figure, by accommodating the helical member 30 in casing 10, and is configured to provide a helical path A in the casing 10.

Here, the casing 10 is formed in a cylindrical shape, and its lower surface is closed by a lid 11. A lid 15 is hermetically fixed to a flange 13 provided on the upper surface of the casing 10 by screws 17 and O-rings 18. On the other hand, a gas inlet 19 for allowing gas to flow in is provided on the lower side surface of the casing 10, and a gas outlet 21 for discharging gas is provided in the lid 15.

On the other hand, the spiral member 30 is configured by attaching a spiral plate 33 around a shaft 31. An internal thread 35 is cut on the upper end surface of the shaft 31.

[0011] Next, a description will be given of the operation of this solid catching collection for the trap 1. When flowing the sublimable gas is compressed by a pump (not shown) heated to a high temperature and high pressure from the gas inlet 19 of the solid capturing current trap 1,該昇Hua gas is increased while swirling the passage A And is discharged from the gas outlet 21.

During this time, the sublimable fluid is applied to the casing 1
The solid content precipitates because it is cooled by the inner peripheral surface a of 0. A large amount of solids is deposited on the inner peripheral surface a where the temperature is low.
The deposited solid is sprayed onto the inner peripheral surface a of the casing 10 by centrifugal force because the solid is heavier than the gas and is swirling. Therefore, the solid content mainly adheres to the inner peripheral surface a of the casing 10. That is, in the cross section of the passage A constituted by the shaft 31, the spiral plate 33, and the surface of the inner peripheral surface a, the precipitated solid adheres mainly to only one surface a, not to the entire cross section of the passage A.

Therefore, unlike the case where the sublimable gas is passed only through the cylindrical pipe, the solid content does not adhere almost uniformly to the entire cross section of the pipe (that is, the path). Even in the case of a cross section, it is possible to extend the period in which the passage is closed due to the adhesion of solid matter, as compared with the case where only the pipe is used.

Further, since the passage A is helical, the length of the passage can be made longer than in the case of only a pipe, the distance over which solids can be deposited can be increased, and solids can be efficiently deposited.

When solids begin to adhere to the inner peripheral surface a of the casing 10, the solids first
The gap b between the inner peripheral surface a of the helical plate 33 and the outer periphery of the spiral plate 33 is filled. Thereby, even if there is a gap b in advance, a completely sealed passage A can be easily formed. In other words, since the outer periphery of the spiral plate 33 does not have to be in close contact with the inner peripheral surface a of the casing 10, not only is the attachment and detachment of the spiral member 30 from the casing 10 easy, but also the two members are in close contact. In this case, there is no problem such as stress caused by the difference between the two coefficients of thermal expansion.

[0016] On the other hand, when washing the solids capturing current trap 1, remove the lid 15 first, then the female screw 35 provided at the upper end of the shaft 31, screwed the male thread of the take-out jig, not shown, The spiral member 30 is pulled up while rotating. Since the spiral plate 33 of the spiral member 30 is pulled up while rotating along the shape of the plate, it can be easily pulled out even if solids are attached. After cleaning the inside of the casing 10 and the spiral member 30, respectively, the casing 1
0, the spiral member 30 is housed, and the cover 15 is covered.
If it is fixed at 7, it returns to its original state.

The present invention is not limited to the above-described embodiment, but may be any structure having a structure in which a spiral passage is provided in a cylindrical casing.

[0018]

[Effect of the Invention] As described above in detail, according to the solid capturing collection trap according to the present invention, it can collector capturing solids efficiently sublimation gas as compared with a mere pipe and clogging of the passage The time to reach is also longer. Therefore, the frequency of stopping the pump due to the blockage of the discharge pipe is reduced, and the maintenance is only required to replace or clean the trap itself, and the workability is improved. Further, the structure is simple.

[Brief description of the drawings]

1 is a side sectional view of such a solid capturing collection trap to the present invention.

FIG. 2 is a diagram showing pressure-temperature characteristics of a sublimable gas.

[Explanation of symbols]

1 solids capturing converging trap 10 casing 30 helical member A passage

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-48-88074 (JP, A) JP-A-53-53460 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04B 39/16 B01D 8/00 F16L 55/24

Claims (1)

(57) [Claims] 1. A solid content trap attached to an exhaust side of a pump that handles a sublimable gas and that collects solid content precipitated from the sublimable gas exhausted from the pump . The trap is placed inside a cylindrical casing
A helical member with a helical plate can be attached and detached in a stationary state
By accommodating, solids collecting trap characterized in that it is formed by providing a helical path inside the casing.