JPH04134980U - Catalyst deposition prevention structure of FCC slide valve support guide - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent catalyst from accumulating and solidifying on the slide valve support surface 2a formed on the support guide 2 that slidably supports the FCC slide valve 1 and guides the movement of the slide valve 1. Do it like this. [Structure] On the slide valve support surface 2a formed on the support guide 2 that supports the slide valve 1, an oyster catcher 5 that can slide in the moving direction of the slide valve 1 is arranged. The catalyst is reciprocated by a reciprocating device 6, and the catalyst placed on the slide valve support surface 2a is forcibly scraped off and removed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is applicable to FCC equipment that uses high-temperature catalysts to crack crude oil and refine fuel oil. The slide valve used to adjust the pressure of the high-temperature catalyst is slidably supported and moved. This invention relates to a catalyst deposition prevention structure for a slide valve support guide that guides the slide valve.

0002

[Conventional technology]

In an FCC unit that uses a high-temperature catalyst to crack crude oil and refine fuel oil, the catalyst (Fluid) pressure adjustment is performed by opening and closing the slide valve 1 shown in FIG. That is, , the slide valve 1 has ears 1A, 1A formed at both ends in the width direction. A, 1A is slidably supported on the horizontal support surface 2a of the support guide 2 whose lower surface has an L-shaped cross section. It's there. Therefore, the opening/closing movement of the slide valve 1 during pressure adjustment is performed by the support guide. This is done while being guided by 2.

0003 By the way, the slide valve 1 of the FCC device has a predetermined opening degree (for example, 4 degrees when fully open). (0 to 50% opening) is often held for a relatively long time. For that purpose, horizontal support The catalyst is deposited and solidified in the area where the slide valve 1 is not supported on the surface 2a. . Even if the catalyst accumulates on the support surface 2a and solidifies, the opening degree of the slide valve 1 can be increased. There is no problem when retracting the valve for the purpose of closing, but it does not cause any problem when retracting the When moving it forward, the solidified catalyst interferes with the slide valve 1 and prevents it from moving forward. It has the disadvantage of causing malfunction.

0004

[Problem that the idea aims to solve]

The problem we are trying to solve is that the catalyst is deposited on the support surface of the support guide, hardens, and slides. This prevents the valve from moving and causes malfunction.

[0005]

[Means to solve the problem]

The present invention supports slidably both ends of the slide valve in the width direction, and Slide the slide valve onto the slide valve support surface formed on the support guide that guides the movement. An oyster catcher that can slide in the direction of movement is arranged, and this oyster catcher is used as a reciprocating device. It is characterized by being configured so that it can be moved back and forth by.

[0006]

[Effect]

According to the present invention, even if the catalyst is placed on the slide valve support surface, the reciprocating device By sliding the oyster catcher on the slide valve support surface, the slide The catalyst resting on the valve support surface can be forcibly removed. Therefore, sli There is no catalyst build-up on the valve support surface. Therefore, the slide valve may malfunction. does not occur.

[0007]

【Example】

FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention, FIG. 2 is a plan view, and FIG. The same or corresponding parts as in the conventional example are given the same reference numerals and detailed explanations will be omitted. 1 is a plate-shaped slide valve, 2 is a support guide with an L-shaped cross section, and the width of the slide valve 1 is The direction edge portions 1A, 1A are the upper surface of the horizontal portion 2A of the support guide 2, that is, the water The support guide 2 is slidably supported by the flat support surface 2a, and the support guide 2 is supported by a plurality of bolts 3, 3. is fixed to the body 4 of the FCC device. on the horizontal part 2A of the support guide 2. , the oyster catcher 5 having a U-shaped cross section is attached so as to be slidable in the direction of movement of the slide valve 1. The oyster catcher 5 is moved back and forth by a reciprocating device 6. It has become. That is, the reciprocating device 6, for example, 2A, close to the inner end of the drive male screw 6A, which is parallel and rotatably arranged. Therefore, this drive male screw 6A is a female screw 5 formed through the oyster catcher 5. B, and extends airtightly to the outside through the body 4. Therefore, self By rotating the drive male screw 6A automatically or manually, the The oyster catcher 5 moves back and forth. In addition, 7 in the figure is a seat ring, 8 indicates a heat-resistant and wear-resistant lining layer made of high alumina material.

[0008] In the above configuration, the oyster catcher 5 is usually placed on standby at the position shown by the solid line in FIG. I'll leave it there. Operate the reciprocating device 6 periodically (for example, once a day) to collect oysters. Advance the fitting 5 to the position where it abuts the front end of the slide valve 1, and from this position proceed as described above. Retract to the standby position. As a result, the catalyst is supported by the slide valve of the support guide 2. The catalyst placed on the surface 2a is forcibly removed by removing the oysters using the oyster removal fitting 5. can do. Therefore, there is an inconvenience that the catalyst is deposited on the slide valve support surface 2a. This can be reliably prevented with an extremely simple structure. Besides that Even when moving the slide valve 1 forward in the closing direction for the purpose of reducing the opening degree, Unlike conventional methods, the solidified catalyst interferes with the slide valve 1 and prevents it from moving forward. Therefore, the slide valve 1 can be operated smoothly.

[0009] In the above embodiment, the reciprocating device 6 is not rotated automatically or manually. The explanation is that it is composed of a drive male screw 6A, but it is composed of a cylinder and a piston. The reciprocating device 6 is constructed by It may be connected to the tool 5.

0010

[Effect of the idea]

As explained above, the catalyst deposition prevention structure of the FCC slide valve support guide of the present invention Even if the catalyst is placed on the slide valve support surface, the catalyst should not be placed on the oyster catcher. Therefore, the oysters can be forcibly removed, so do not touch the slide valve support surface. No media build up. For this purpose, the slide valve is closed to reduce the opening degree. Even when moving forward in the same direction, the solidified catalyst prevents the slide valve from moving. It is possible to reliably prevent the occurrence of inconveniences that would impede the progress of the vehicle. However, Therefore, the slide valve can operate smoothly with a simple catalyst deposition prevention structure. It has the advantage of

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a longitudinal sectional front view showing a conventional example.

[Explanation of symbols]

1 Slide valve 1A Both widthwise ends (ears) of slide valve 2 Support guide 2a Horizontal support surface (slide valve support surface) 5 Oyster catcher 6 Reciprocating device

Claims (1)

[Scope of utility model registration request] 1. A catalyst deposition prevention structure for a support guide that slidably supports both widthwise ends of a slide valve and guides movement of the slide valve, the slide valve being formed on the support guide. An FCC slide valve support guide, characterized in that an oyster catcher that is slidable in the direction of movement of the slide valve is arranged on a support surface, and the oyster catcher is moved back and forth by a reciprocating device. Structure to prevent catalyst accumulation.