JP2000214054A - Particle sampler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sample a catalyst in the center of a catalyst filling layer without opening a catalyst filling pressure vessel. SOLUTION: An upper sampler 5 comprises an outer tube 7 secured to the side wall of a vessel by welding while penetrating it horizontally, and an inner tube 8 inserted therein rotatably wherein an outer hole 9 for feeding particles is made at a part of the outer tube 7 being inserted into the vessel and an inner hole 10 for feeding particles is made at a part of the inner tube 8 corresponding to the outer hole 9. The inner and outer holes 10, 9 are elongated in the length direction. The inner and outer tubes 8, 7 have closed forward ends. A flange 1 is provided at the base end of the inner tube 8 and an arcuate guide hole 12 is made in the circumferential direction. A projecting stopper 16 is fixed to the base end face of the outer tube 7 by means of screws with the body part being located in a guide hole 12. The inner tube 8 can be turned by about 90 deg. by means of a rotary knob 13 until the end of the guide hole 12 abuts against the stopper 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a particle sampling apparatus. It is necessary to periodically measure the life of the catalyst for adsorbing and removing mercury contained in natural gas produced from offshore oil fields, and to predict when the catalyst will be replaced. This catalyst life prediction is performed by removing a small amount of sample from the center of the catalyst packed bed and analyzing it by a catalyst manufacturer.
The present invention relates to a sampling device used for measuring the life of a mercury adsorption catalyst in a mercury adsorption catalyst facility installed as a pretreatment facility in a gas receiving line of an LPG plant for separating / purifying natural gas.

[0002]

2. Description of the Related Art Conventionally, mercury-adsorbing catalysts have been sampled for measuring the life of the mercury-adsorbing catalyst in a mercury-adsorbing catalyst facility, but there is no catalyst sampling device attached to a catalyst-filled pressure vessel.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a sampling apparatus capable of collecting a catalyst in the center of a catalyst packed bed without opening a catalyst filled pressure vessel.

[0004]

According to the present invention, there is provided a particle sampling apparatus comprising: an outer cylinder fixed to a vessel wall of a container so as to penetrate; an inner cylinder rotatably inserted into the outer cylinder and having a closed end. It consists of a cylinder, and an outer hole for inflow of particles is provided in a portion of the outer cylinder inserted into the container, and an inner hole for inflow of particles is provided in a position corresponding to the outer hole in the inner cylinder, and the inner cylinder is rotated. In this way, the inner hole is communicated with the outer hole to take in the particles in the container into the inner cylinder, and the inner cylinder is rotated to a position where the inner hole does not communicate with the outer hole to take out the particles in the inner cylinder to the outside. .

[0005]

By rotating the inner cylinder of the double-cylinder sampling device inserted into the center of the catalyst packed bed in the vessel, the inner hole is communicated with the outer hole, and sample particles can be collected through these holes. After the inner cylinder is rotated to a position where the inner hole does not communicate with the outer hole to shut off the inner cylinder, the catalyst in the inner cylinder can be taken out. By using this sampling device, it is possible to collect sample particles at the center of the catalyst packed bed without opening the manhole or the like of the container.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to the accompanying drawings.

FIG. 1 shows the structure of a catalyst-filled pressure vessel (1) having a design pressure of 49.5 barG. In the vessel (1), a packed bed of granular catalyst (for example, activated carbon sulfide manufactured by Calgon, USA)
(2) and ceramic ball layer sandwiching it from above and below (3) (4)
Are provided. Natural gas containing mercury flows from top to bottom in the catalyst packed bed (2), and in this process, mercury is adsorbed and removed by the catalyst. Two upper and lower catalyst sampling devices are provided on the side wall of the container (1). The upper sampling device (5) is located near the upper end of the catalyst packed bed (2), and the lower sampling device (6) is located near the lower end of the catalyst packed bed (2).

FIG. 2 is a detailed structural view of the catalyst sampling device. The upper sampling device (5) includes an outer cylinder (7) penetrated horizontally through the side wall of the container (1) and fixed to the side wall by welding,
Inner cylinder rotatably inserted into outer cylinder (7)
The outer cylinder (7) is provided with an outer hole (9) for the inflow of particles at the insertion portion of the outer cylinder (7) into the container, and the inner cylinder (8) has a hole for inflow of particles at a position corresponding to the outer hole (9). Inner hole (10) is provided. Outer hole
Both (9) and the inner hole (10) are elongated holes extending in the length direction. Both ends of the outer cylinder (7) and the inner cylinder (8) are closed.

A flange (11) is provided at the base end of the inner cylinder (8), and an arc-shaped guide hole (12) is formed in the flange in the circumferential direction. On the other hand, a protruding stopper is provided on the base end face of the outer cylinder (7).
(16) is screwed, and its body is located in the guide hole (12). The inner cylinder (8) is rotated by the rotary knob (13) to guide holes (1).
It can be rotated about 90 degrees until the end of 2) hits the stopper (16).

A cover (15) for covering the base end surface of the inner tube (8) is arranged on the base end surface of the outer tube (7), and is screwed to a flange (14) of the outer tube (7).

The lower sampling device (6) has the same configuration as the upper sampling device (5).

In the catalyst sampling apparatus having the above structure, the inner tube (8) is rotated so that the inner hole (10) is communicated with the outer hole (9) of the outer tube (7), so that the catalyst in the container (1) is rotated. The particles are taken into the inner cylinder (8). Thereafter, the inner cylinder (8) is shut off from the outer cylinder (7) by rotating, for example, 90 degrees to a position where the inner hole (10) does not communicate with the outer hole (9), and the catalyst in the inner cylinder (8) is removed. Take out with a spatula. Sampling amount is 10c
c.

FIG. 3 shows the change over time of the mercury concentration in the catalyst. It can be seen from the catalyst at the position of the upper sampling device (5) that the mercury concentration in the catalyst increases and reaches saturation according to the operation time. When the mercury concentration of the catalyst at the position of the lower sampling device (6) starts to increase, the catalyst is replaced at the next periodic inspection of the plant.

In the above embodiment, both the upper sampling device (5) and the lower sampling device (6) are installed horizontally on the container (1), but these are inclined with respect to the container (1). It may be installed. In this case, the inner cylinder
The catalyst particles in (8) flow out due to their own weight.

[0015]

According to the particle sampling apparatus of the present invention, the catalyst at the center of the catalyst packed bed can be sampled without opening the catalyst packed pressure vessel, and the life of the catalyst can be reliably predicted from the analysis result. it can.

Further, since the collected catalyst is taken out of the inner cylinder without changing the outer cylinder of the sampling device, the catalyst packed layer is not broken.

[0017] This sampling device can maintain the sealing performance with a pressure resistance of 49.5 barG during normal operation of the equipment.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing the structure of a catalyst-filled pressure vessel.

FIG. 2 is an exploded view showing a sampling device.

FIG. 3 is a graph showing a change over time in mercury concentration.

[Explanation of symbols]

 1: pressure vessel filled with catalyst 2: catalyst packed layer 3, 4: ceramic ball layer 5: upper sampling device 6: lower sampling device 7: outer cylinder 8: inner cylinder 9: outer hole 10: inner hole 11, 14: flange 12 : Guide hole 13: Rotary knob 15: Lid 16: Stopper

Claims (1)

[Claims] An outer cylinder fixed to a vessel wall of a container so as to penetrate therethrough, and an inner cylinder rotatably inserted into the outer cylinder and having a closed end, and a portion of the outer cylinder inserted into the container. An outer hole for inflow of particles is provided in the inner cylinder, an inner hole for inflow of particles is provided in a position corresponding to the outer hole in the inner cylinder, and the inner hole is communicated with the outer hole by rotating the inner cylinder, so that the container is A particle sampling device that takes in particles in the inner cylinder, rotates the inner cylinder to a position where the inner hole does not communicate with the outer hole, and takes out the particles in the inner cylinder to the outside.