JPH0322597Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for attaching a seat ring to a valve box forming a descending flow path so as to protrude downward from the inner surface of the valve box adjacent to the seat ring. The present invention relates to a slide valve for a fluid catalytic cracking apparatus, in which a valve body located on the lower side of the valve body is attached to a guide fixed to the valve box so as to be slidable to open and close.

[Conventional technology]

Conventionally, as shown in FIG. 5, a gap with a wide vertical width is provided between the inner surface of the valve body 1a located above the seat ring 2 on the side of the valve body storage chamber 9 and the valve body 4 at an intermediate opening position. C exists, and because of the structure in which the valve body 4 is slidably attached to the guide 5, the mixture of oil and catalyst easily flows into the gap C from the descending passage 3 in the valve box 1. .

[Problem that the invention attempts to solve]

However, since the flow is stagnant in the gap C above the valve body 4, the catalyst that has flowed into the gap C tends to accumulate and stick on the valve body 4 at the intermediate opening position, causing the catalyst to become stuck to the valve body 4. There was a risk that the catalyst sticking would make it difficult or impossible to open and close the valve body 4 by pushing and pulling the rod 8, and there was room for improvement.

The purpose of the present invention is to make it difficult for the catalyst to stick to the valve body at the intermediate opening position, and to make it possible to easily and reliably remove the stuck catalyst even if the catalyst sticks, and to create a configuration that is advantageous in terms of manufacturing. The point is to make it something.

[Means for solving problems]

The characteristic configuration of the present invention is that a seat ring on the valve box side protrudes downward from the inner surface of the valve box, and a seat ring that extends between the valve box and the valve body toward the storage chamber side of the valve body below the seat ring. an extending portion is integrally formed, a purge nozzle is integrally provided on the seat ring extending portion, and a portion of the upper surface of the valve body at an intermediate opening position faces the seat ring extending portion; The purpose of this invention is to form a purge fluid ejection port in the nozzle, and its effects are as follows.

[Effect]

In other words, the gap between the valve body at the intermediate opening position and the inner surface of the valve body above it is filled by the seat ring extension, and the catalyst flows into the gap between the valve body and the seat ring extension. It can be made with a narrow top and bottom width.

In addition, the purge fluid ejected from the nozzle toward the top surface of the valve body can be blown out into the valve body storage chamber from the narrow gap between the valve body and the nozzle to prevent the catalyst from flowing into the gap, or to prevent the catalyst from flowing into the gap. If catalyst sticking occurs, the stuck catalyst can be removed with purge fluid from the nozzle.

Furthermore, since the seat ring extension portion is integrally constructed with the seat ring, an increase in the number of parts and assembly man-hours can be suppressed to a minimum compared to when they are separate parts.

[Effect of idea]

As a result, it is possible to reliably prevent problems with valve opening/closing operations caused by catalyst sticking to the valve body at the intermediate opening position, and to ensure that the valve remains open even after maintaining the intermediate opening state for a long time to adjust the flow rate. The opening can be easily and reliably adjusted and switched to both the side and the closed side, and the configuration for this can be made advantageous in terms of manufacturing. Overall, the slide valve for fluid catalytic cracking equipment has good performance. We are now able to offer this product at an advantageous price point.

〔Example〕

Next, an example will be shown with reference to FIGS. 1 to 4.

The seat ring 2 is attached to the valve box 1 with bolts in such a manner that it protrudes below the inner surface 1a of the adjacent valve box, and the lower narrowed flow path portion 3a, the small diameter flow path portion 3b, and the large diameter flow path portion 3c are aligned in the flow direction. A parallel downward flow path 3 is formed in the valve box 1, and a valve body 4 located below the seat ring 2 is slidably attached to a guide 5 fixed to the valve box 1 with bolts, and can be opened and closed. The operating handle 6 and the cylinder 7 are interlocked by a rod 8, forming a slide valve for a fluid catalytic cracking apparatus for adjusting the flow rate of a mixture of oil and catalyst.

From one end side of the seat ring 2 to the storage chamber 9 of the valve body 4
A purge nozzle 10 is integrally provided on a seat ring extension portion 2a that extends between the valve body 1 and the valve body 4 toward the side and is integrally formed on the seat ring 2. The purge fluid spout 10a is formed toward the upper surface of the valve body 4 at the intermediate opening position, facing the seat ring extension 2a, and the purge fluid supply pipe 11 is connected to the nozzle 10. The gap between the body 4 and the nozzle 10 is narrowed to suppress the inflow of the catalyst, and a purge fluid is used to prevent the catalyst from flowing into the gap and to remove the inflowing catalyst from the gap.

A purge fluid distribution path 10b is connected to the center of each row of purge fluid jet ports 10a, and in each row of purge fluid jet ports 10a, the central jet port 10a is formed to have a small diameter and the outer jet ports 10a are formed to have a large diameter. Thus, a sufficient amount of purge fluid is ejected from all the ejection ports 10a.

In the figure, 12 is a lining material, 13 is a nozzle that spouts purge fluid toward the guide 5, and 14 is a nozzle that jets purge fluid toward the valve body 4.

[Another example]

Next, another example will be shown.

Installation range of nozzle 10, purge fluid spout 10
The number and arrangement of a, the type and supply configuration of the purge fluid, the structure of the seat ring 2 and the valve body 4, and other specific configurations of the slide valve can be changed as appropriate.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention,
Figure 1 is a vertical cross-sectional view of the main part, Figure 2 is the − of Figure 1.
FIG. 3 is a cross-sectional view of the main part, and FIG. 4 is a partially cutaway overall side view. FIG. 5 is a vertical sectional view of the main part of the conventional example. DESCRIPTION OF SYMBOLS 1... Valve box, 1a... Valve box inner surface, 2... Seat ring, 2a... Seat ring extension part, 4... Valve body, 5... Guide, 9... Storage chamber, 10... Nozzle, 10a...Purge fluid spout.

Claims (1)

[Scope of utility model registration request] A seat ring 2 is attached to the valve box 1 forming the descending flow path 3 in a state protruding downward from the inner surface 1a of the valve box adjacent thereto, and the valve body 4 located below the seat ring 2 is attached to the valve box 1. This is a slide valve for a fluid catalytic cracking device that is attached to a guide 5 fixed to a box 1 so as to be able to open and close by sliding. A seat ring extension 2a extending between the valve bodies 4 is integrally formed, and a purge nozzle 10 is integrally provided on the seat ring extension 2a. A slide valve for a fluid catalytic cracking apparatus, in which a purge fluid jet port 10a is formed in the nozzle 10 toward a portion of the upper surface facing the seat ring extension portion 2a.