JPH11104482A - Catalyst extrusion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catalyst extrusion device for extracting a catalyst with high workability while keeping the good working environment. SOLUTION: A catalyst extrusion device 10 is used for transferring the desired quantity of a powdery catalyst stored in a catalyst hopper 12 to a flexible container bag P disposed on a position lower than that of the catalyst hopper by utilizing the height difference. One end 22 of the device is connected with a catalyst extrusion opening of the catalyst hopper, and the other end 25 is inserted into the flexible container bag, and the device is provided with an actuator-driven cylinder valve 14 with an air blowing-off means or its chute face being brought into contact with the valve, an air extrusion tube 64 inserted between the on-off valve and the bag, and an air suction device with suction means 66, 68 and 70 for sucking air in the bag through the air extrusion tube.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalyst extracting device, and more particularly, to a catalyst extracting device for efficiently extracting a catalyst from a catalyst hopper while maintaining a good working environment. The present invention relates to a catalyst extracting device most suitable for extracting the catalyst.

[0002]

2. Description of the Related Art Fluid Catalytic Cr
An acking device (hereinafter simply referred to as an FCC device) regenerates a reaction tower containing a fluidized catalyst bed in which a powdery catalyst is fluidized, and a catalyst that has reduced the activity by contributing to the reaction in the reaction tower. A regenerative tower, and a heavy oil such as a vacuum distillate or an atmospheric resid obtained by re-distilling the residual oil obtained by distilling a crude oil in an atmospheric distillation tower under reduced pressure, or a mixture thereof as a feedstock oil. Is a device for performing a decomposition reaction at a high temperature under a fluidized catalyst bed of a reaction tower to obtain a high octane number gasoline base material rich in unsaturated aromatic hydrocarbons. In the cracking reaction of feedstock,
Coke is by-produced and accumulates on the catalyst, reducing catalytic activity. Therefore, the catalyst is sent from the fluidized catalyst layer of the reaction tower to the regeneration tower, and the coke deposited on the catalyst is burned to regenerate the catalyst activity and sent to the reaction tower again. Since the catalyst activity cannot be maintained, a new catalyst is continuously or intermittently charged into the regeneration tower, and an amount of the catalyst corresponding to the amount is extracted from the catalyst layer. The catalyst extracted from the catalyst layer is usually called an equilibrium catalyst, and is a very fine powder having a particle size of several μm to several tens μm.

[0003] The equilibrium catalyst is continuously or intermittently withdrawn from the regeneration tower, temporarily stored in the equilibrium catalyst hopper, and charged into the flexible container bag from the equilibrium catalyst hopper so as to maintain an appropriate level of the hopper. It is carried out of the place. The amount is about 20 to 200 tons per month with a normal FCC device. The flexible container bag is a double bag with a polyethylene outer bag and a vinyl interior, and is a bag used for packing powder or granules.

Here, the configuration of a conventional equilibrium catalyst extracting device will be described with reference to FIG. In the conventional equilibrium catalyst extraction device, as shown in FIG. 5, a manual opening / closing valve (gate valve) 18 is provided in the equilibrium catalyst extraction pipe 13 provided at the bottom of the hopper 12 and extending to the flexible container back P to extract the equilibrium catalyst. The distal end of the tube 13 is inserted into the bag opening of the flexible container bag P, and is squeezed with both arms so as not to leak from the bag opening of the flexible container bag P. The opening and closing of the on-off valve 18 controls the start and stop of the extraction of the equilibrium catalyst, and the equilibrium catalyst is supplied to the flexible container bag.

[0005]

However, the extraction of the equilibrium catalyst by the conventional equilibrium catalyst extraction device has the following problems. First, on-off valve 1
In this case, since the catalyst bites into the disk sheet surface of No. 8, even if the sheet is purged, the closing is incomplete and the catalyst leaks. Second, when the catalyst is charged into the flexible container bag, the bag mouth is squeezed, so that the pressure inside the flexible container bag increases, and fine dust is scattered around between the flexible container bag and the equilibrium catalyst extraction pipe. However, there is a problem that the working environment is deteriorated. Thirdly, when extracting the catalyst into the flexible container bag, the internal pressure around the bag opening decreases hydrodynamically due to the flow velocity when the catalyst flows into the bag opening of the flexible container bag. There has been a problem that it takes a long time to put the catalyst into one flexible container bag because the bag mouth is shrunk and the amount of catalyst to be withdrawn is reduced due to an increase in the pressure inside the flexible container bag. In the above description, the problem with extracting the catalyst is described by taking the equilibrium catalyst as an example.
There is a similar problem.

Accordingly, an object of the present invention is to solve the above-mentioned problems associated with the conventional apparatus, and to provide a catalyst extracting apparatus which efficiently extracts a catalyst while maintaining a favorable working environment.

[0007]

In order to achieve the above object, a catalyst extracting device according to the present invention comprises a bag for disposing a desired amount of a powdery catalyst contained in a catalyst hopper at a position lower than the catalyst hopper. A catalyst withdrawing device for transferring to a body at a height difference, wherein one end is connected to a catalyst withdrawal opening of a catalyst hopper, and the other end is provided with a valve body inserted into a bag body and a valve body. An on-off valve having a seat portion, a valve body that moves in and out of the valve body and closes the valve body in contact with the seat portion, an air blowing unit that blows air to the seat portion, and an actuator that advances and retreats the valve body, and a bag. An air suction device having an air extraction pipe interposed between the other end of the on-off valve inserted into the body and the bag body, and suction means for sucking air in the bag body through the air extraction pipe. Is characterized by having .

The shape of the catalyst hopper is not limited, and a catalyst hopper having a known shape can be used. There is no restriction on the type of the on-off valve as long as it can open and close the catalyst withdrawal. The configuration of the air suction device is not limited as long as the air in the bag body can be sucked through the air extraction tube, but preferably, the suction means is accompanied by the air in the bag body via the air extraction tube. A cyclone provided in the air extraction pipe so as to separate the fine particles from the air, an ejector provided downstream of the cyclone and using the air as a driving fluid to suck air passing through the cyclone, and the other inserted in the bag body An air inlet pipe is interposed between the end portion and the bag body and communicates the bag body with the atmosphere. The cyclone captures the dust that accompanies the sucked air, and the air inlet pipe introduces the amount of air that matches the amount of air sucked into the bag from the atmosphere, preventing the bag from shrinking due to the pressure of the air. I do.

The on-off valve may be a known on-off valve driven by an actuator, and may be either an electric actuator or a hydraulic actuator. Preferably, the on-off valve is connected at one end to the bottom opening of the catalyst hopper. A cylinder having a second opening communicating with the bag at the other end; a sheet portion provided along the cylinder inner periphery before the second opening of the cylinder; A circle attached to the tip of the shaft that moves forward and backward, separates from the seat portion toward the second opening as the shaft advances, approaches the seat portion as the shaft retreats, and contacts the seat portion at the peripheral surface to close the cylinder. The cylinder valve includes a plate-shaped valve element, an air nozzle that blows air to a valve element contact surface of a seat portion, and a hydraulic actuator that moves a shaft forward and backward. More preferably, it is controlled so that air is blown out from the air nozzle immediately before the valve body comes into contact with the seat portion.

In a preferred embodiment of the present invention, a ring-shaped frame portion inserted into the upper portion of the bag body and maintaining the upper shape of the bag body in a predetermined shape, and a mounting portion for attaching the frame portion to the tip of the on-off valve are provided. The holding frame body having the bag body shape is attached to the other end of the on-off valve via the attachment portion. Also,
In another preferred embodiment, an aeration air inlet nozzle for aerating the catalyst is provided at the bottom of the catalyst hopper. When the aeration of the catalyst is performed during the removal of the catalyst, air flows into the on-off valve together with the catalyst, and the amount of fine particles of the catalyst increases.When the on-off valve is opened, the aeration of the catalyst is stopped and the on-off valve is closed. Then, aeration of the catalyst is started.

The catalyst extracting apparatus according to the present invention can be applied to a work of putting a catalyst such as a waste catalyst into a bag and carrying it out, and is particularly suitable for a work of putting an equilibrium catalyst in a flexible container bag and carrying it out.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment Example This embodiment is one example showing an embodiment of a catalyst extracting device according to the present invention, FIG. 1 is a schematic diagram showing a configuration of a catalyst extracting device of the present embodiment, and FIG. FIG. 3 is a detailed sectional view showing the configuration of the seat portion of the cylinder valve, and FIG. 3 is a detailed sectional view of the mounting end of the cylinder valve. When the catalyst extracting device 10 (hereinafter simply referred to as the device 10) of the present embodiment loads the equilibrium catalyst from the equilibrium catalyst hopper 12 into the flexible container bag P and carries it out, the equilibrium catalyst is charged into the flexible container bag P. Device.

As shown in FIG. 1, the present apparatus 10 comprises an equilibrium catalyst hopper 12, a cylinder valve 14, an air suction device 16,
And The equilibrium catalyst hopper 12 is a hopper for temporarily storing a waste catalyst partially extracted from a regeneration tower (not shown) for regenerating a catalyst with reduced catalyst activity, that is, an equilibrium catalyst. In order to adjust the flow rate of the catalyst withdrawn from the equilibrium catalyst hopper 12, a gate valve 18 is attached to its opening.

The cylinder valve 14 has one end 22 connected to the gate valve 18 and the other end 2 as shown in FIG.
5 is inserted into the bag opening of the flexible container bag P, and around the bag opening of the flexible container bag P, the flexible container bag P and the cylinder valve 1 are inserted.
4 and lightly squeezed with a rubber band or the like to prevent leakage. When the catalyst is charged, the plastic bag shifts forward due to its own weight. More specifically, as shown in FIG. 2, the cylinder valve 14 includes a first valve connected to a gate valve 18 as a valve body.
The opening 20 (see FIG. 3) of the second opening 2 communicating with the flexible container bag P is connected to one end (the end on the mounting side) 22.
4 at the other end 25. Inside the cylinder 26, a cylindrical sheet portion 28 made of carbon steel is provided along the inner circumference of the cylinder before the second opening 24. In the cylinder 26, a shaft 33 having a valve body 30 at the tip is driven by a pneumatic actuator 34 (see FIG. 1) to advance and retreat.

The valve body 30 is a disk-shaped member extending in a direction perpendicular to the shaft 33 and having a diameter slightly smaller than the inner diameter of the cylinder 26.
The shaft 26 moves away from the seat portion 28 toward the opening 24 and approaches the seat portion 28 with the retraction of the shaft 33 to contact the end surface (sheet surface) 32 of the seat portion 28 on the peripheral surface to close the cylinder 26. The valve body 30 includes an annular rubber packing 36 on a surface of the seat portion 28 that is in contact with the seat surface 32, and a valve body 3.
A short-cylindrical lens-shaped metal gasket 38 for guiding the zero to the seat portion 28 is provided. Cylinder valve 14
Further, an air flow path 40 that allows air to flow through the seat surface 32 immediately before the valve body 30 comes into contact with the seat surface 32 of the seat portion 28.
Between the seat portion 28 and the cylinder 26 and an air nozzle 42 for supplying air to the air passage 40. An on-off valve (not shown) provided in the air nozzle 42 is opened just before the actuator 34 starts and the shaft 33 starts to retreat and comes into contact with the seat surface 32, so that air flows through the seat surface 32 and the valve 30 When the sheet surface 32 comes into contact, the air path 40 is automatically closed, and the inflow of air stops.

The mounting side end 22 of the cylinder valve 14 is
As shown in FIG. 3, the inner cylinder portion 44 connected to the cylinder 26
And an outer cylinder portion 48 rotatably provided around the inner cylinder portion 44 and connected to and fixed to the gate valve 18 via flanges 46A and 46B. In addition, 50 is an inner cylinder part 44,
Reference numeral 52 denotes an O-ring, which is an inlet for grease to be injected for smooth sliding between the outer cylinder 48 and the outer cylinder 48. As a result, the cylinder valve 14 is rotatable around the outer cylinder portion 48, and thus around the equilibrium catalyst hopper 12. Further, the cylinder valve 14 is provided with a shaft hole 5 having a cylinder sealing gland in order to allow the shaft 33 to pass through the end 22.
4

As shown in FIG. 4 (a), a bag-shaped holding frame 56 for keeping the bag opening of the flexible container bag P largely open is attached to the end portion 25 of the cylinder valve 14. As shown in FIG. As shown in FIGS. 4A and 4B, the holding frame body 56 is inserted into the upper part of the flexible container bag P, and has a ring-shaped frame portion 58 for holding the upper shape of the flexible container bag P.
And a mounting portion 60 for mounting the frame portion 58 to the end portion 25 of the cylinder valve 14.

The air suction device 16 is inserted between the flexible container bag P and the cylinder valve 14 to supply air to the flexible container bag P, and between the flexible container bag P and the cylinder valve 14. , A first cyclone 66 connected to the air suction tube 64, a second cyclone 68 connected to the first cyclone 66, and a second cyclone 68. And an ejector 70 for sucking the air in the flexible container bag P via the air suction pipe 64, the first cyclone 66, and the second cyclone 68.
The first cyclone 66 and the second cyclone 68 capture dust entrained in the air sucked from the flexible container bag P via the air suction pipe 64, and respectively store the lower storage tank 72,
74. The ejector 70 uses the air supplied from the air source as a driving fluid to suck and remove the air in the second cyclone 68, that is, in the flexible container bag P. During the air suction, the air inlet pipe 62 takes in air from the surroundings and adjusts the internal pressure in the flexible container bag P to be slightly negative or equal to the atmospheric pressure so that the flexible container bag P is not reduced by the negative pressure. I have to. The air inlet pipe becomes a supercharger by an air nozzle and also functions as a check valve.

At the bottom of the equilibrium catalyst hopper 12, an aeration air inlet pipe 76 for introducing air and an on-off valve 78 are provided to aerate the catalyst stored in the equilibrium catalyst hopper 12 to increase the fluidity. It is. The opening and closing of the on-off valve 78 is the reverse of the opening and closing of the cylinder valve 14. When the cylinder valve 14 is opened, the on-off valve 78 is closed, aeration of the catalyst is stopped, and when the cylinder 14 is closed, the on-off valve is opened. 78 is opened and aeration of the catalyst is started. If aeration of the catalyst is performed during the removal of the catalyst, the air flows into the cylinder valve 14 together with the catalyst, and the amount of the catalyst particles increases, which is not preferable.

A method of charging the equilibrium catalyst from the equilibrium catalyst hopper 12 to the flexible container bag P using the above-described apparatus 10 will be described below. (1) Open the gate valve 18 appropriately. (2) Set the flexible container bag P in a lifting device (not shown) so that the outer bag of the flexible container bag P can be lifted, take out the plastic bag, cover the end portion 25 of the cylinder valve 14 with a plastic bag, End 25 and holding frame 56
Into the plastic bag, and squeeze the plastic bag at the center of the cylinder valve with rubber or the like. (3) The driving air is supplied to the ejector 70 to start the air suction device 16. (4) Activate the actuator 34 to open the cylinder valve 14 and charge the equilibrium catalyst from the equilibrium catalyst hopper 12 into the flexible container bag P. (5) The catalyst particles soared in the flexible container bag P during the extraction of the equilibrium catalyst are entrained by the air, guided to the first and second cyclones 66 and 68 through the air suction pipe 64, captured, and captured by the air. Is released to the atmosphere. (6) When a predetermined amount of the equilibrium catalyst has been charged into the flexible container bag P, the flexible container bag P is removed from the cylinder valve 14 and replaced with the next flexible container bag. Flexible container back P
When replacing the cylinder, first, the actuator 34 is activated and the cylinder valve 14 is closed. At this time, air flows to the seat surface 32 of the seat portion 28 in conjunction with the activation of the actuator 34, thereby preventing the catalyst from being caught at the time of contact between the valve body 30 and the seat surface 32. When the valve body 30 comes into contact with the seat surface 32, the air path 40 is automatically closed, and the inflow of air is stopped. When the cylinder 14 is closed, the on-off valve 78 of the aeration air inlet pipe 76 is opened, and the aeration of the catalyst is started. (7) After the cylinder valve 14 is closed, the flexible container bag P is removed, and the next flexible container bag is attached. (8) Hereinafter, the operations of (2) to (7) are repeated.

[0021]

According to the present invention, one end is connected to the catalyst withdrawal opening of the catalyst hopper, the other end is inserted into the bag body, and has air blowing means on the seat surface in contact with the valve body. A favorable working environment is maintained by configuring a catalyst extracting device including an actuator-driven opening / closing valve and an air suction device including suction means for sucking air in the bag body through an air extracting tube. The catalyst can be efficiently sent to the bag body while being used.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a configuration of a catalyst extracting device according to an embodiment of the present invention.

FIG. 2 is a detailed sectional view showing a configuration of a seat portion of the cylinder valve.

FIG. 3 is a detailed sectional view of a mounting portion of the cylinder valve.

FIG. 4A is a perspective view of the holding frame, and FIG. 4B is a top view of the holding frame viewed from above.

FIG. 5 is a schematic diagram showing a configuration of a conventional equilibrium catalyst extraction device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Embodiment of catalyst extraction apparatus 12 Equilibrium catalyst hopper 13 Equilibrium catalyst extraction pipe 14 Cylinder valve 16 Air suction device 18 Gate valve 20 First opening 22 One end 24 Second opening 25 The other end 26 Cylinder 28 Seat part 30 Valve element 32 Seat surface 33 Shaft 34 Pneumatic actuator 36 Rubber packing 38 Gasket 40 Air flow path 42 Air nozzle 44 Inner cylinder part 46 Flange 48 Outer cylinder part 50 Grease injection port 52 O-ring 54 Shaft hole 56 Bag Body shape holding frame 58 Frame section 60 Attachment section 62 Air inlet pipe 64 Air suction pipe 66 First cyclone 68 Second cyclone 70 Ejector 72, 74 Storage tank 76 Aeration air inlet pipe 78 On-off valve

Claims (5)

[Claims] 1. A catalyst extracting device for transferring a desired amount of a powdery catalyst contained in a catalyst hopper to a bag disposed at a position lower than the catalyst hopper by a height difference, wherein one end of the catalyst hopper is a catalyst hopper. The valve body is connected to the catalyst withdrawal opening, and the other end is inserted into the bag body, the seat portion provided on the valve body, and the valve body is moved forward and backward, and comes into contact with the seat portion to close the valve body. An on-off valve having a valve body, air blowing means for blowing air to the seat portion, and an actuator for moving the valve body forward and backward; and an intervening valve interposed between the other end of the on-off valve inserted into the bag body and the bag body. A catalyst extraction device comprising: an air extraction tube having an air suction pipe; and an air suction device having suction means for sucking air in the bag body through the air extraction tube. 2. A bag-shaped holding frame having a ring-shaped frame inserted into the upper portion of the bag and maintaining the upper shape of the bag in a predetermined shape, and a mounting portion for attaching the frame to the tip of the on-off valve. The catalyst removal device according to claim 1, wherein the body is attached to the other end of the on-off valve via an attachment portion. 3. A cyclone provided in the air extraction pipe so as to separate fine particles entrained in the air from the bag via the air extraction pipe from the air, and a suction means provided downstream of the cyclone. As a driving fluid,
An ejector that sucks air through the cyclone and an intervening member between the other end inserted into the bag and the bag,
The catalyst removal device according to claim 1 or 2, further comprising: an air inlet pipe that communicates air between the bag body and the atmosphere to feed air into the bag body. 4. An on-off valve comprising: a cylinder having a first opening connected to a bottom opening of a catalyst hopper at one end and a second opening communicating with a bag at the other end; A seat portion provided along the inner periphery of the cylinder just before the second opening, and attached to a tip of a shaft which advances and retreats in the cylinder;
A disc-shaped valve body that moves away from the seat portion toward the second opening as the shaft advances, approaches the seat portion as the shaft retreats, and contacts the seat portion on the peripheral surface to close the cylinder; The catalyst extracting device according to any one of claims 1 to 3, wherein the device is a cylinder valve including an air nozzle that blows air to a valve body contact surface, and a hydraulic actuator that moves a shaft forward and backward. . 5. The catalyst extracting device according to claim 1, further comprising an aeration air supply nozzle for performing aeration of the catalyst at a bottom of the catalyst hopper.