Slurry catalyst discharging device

Abstract

The utility model discloses a slurry catalyst discharging device, which belongs to the technical field of discharging devices and comprises a slurry barrel, a buffer tank arranged on the lower side of the slurry barrel, a discharging pipe arranged at the bottom of the slurry barrel, a feeding pipe arranged on the upper portion of the buffer tank, a valve a arranged on the feeding pipe and connected with the discharging pipe through a flange. A feeding pipe is arranged on the buffer tank, a feeding device and an exhaust device are respectively arranged on the buffer tank and are positioned on two sides of the feeding pipe, a flushing pipe with external threads at the end part is arranged on the slurry barrel, a branching mechanism is arranged on the feeding device, and the branching mechanism is connected with the flushing pipe. The slurry catalyst in the slurry barrel can be directly washed to remove residues after being discharged, the operation is simple, the slurry barrel cannot be scratched by the washing liquid, and the subsequent use of the slurry barrel is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of unloading devices, in particular to a slurry catalyst unloading device. Background Art

[0002] Our company adopts low-pressure slurry process to produce high-density polyethylene products. The catalyst designed and used is a dry powder catalyst, which is sampled in a 200L iron barrel. In recent years, with the rapid increase in domestic ethylene production capacity, the production capacity of downstream polyethylene products with the same process has also shown explosive growth, and the products are seriously homogenized. In order to enhance the market competitiveness of the device, a domestically produced new slurry catalyst was introduced into the HDPE device for the production of high-performance polyethylene products. The catalyst is a mixture of hexane and titanium catalyst in a certain proportion and is contained in a 200L iron barrel. When the slurry catalyst is applied to the original catalyst feeding system, the slurry catalyst in the catalyst barrel is easy to hang on the wall at the end of unloading, resulting in incomplete unloading, catalyst loss, and increased production costs. The existing technology uses a scraping device to scrape the material, but the scraping operation is cumbersome and easy to cause scratches on the barrel wall, affecting subsequent use. Utility Model Content

[0003] In order to solve the technical problems mentioned in the above background technology, the utility model provides a slurry catalyst unloading device, and the technical solution adopted is as follows:

[0004] It includes a slurry barrel, which is characterized in that a buffer tank is arranged at the lower side of the slurry barrel, a discharge pipe is arranged at the bottom of the slurry barrel, a feed pipe is arranged at the upper part of the buffer tank, the discharge pipe and the feed pipe are connected by a flange, a valve a is arranged on the feed pipe, a feeding device and an exhaust device are respectively arranged on both sides of the feed pipe on the buffer tank, a flushing pipe with an external thread at the end is arranged on the slurry barrel, a tapping mechanism is arranged on the feed device, and the tapping mechanism is connected to the flushing pipe.

[0005] Preferably, the feeding device includes a feeding pipeline and valve b, a pressure reducing valve, a valve c, a batch controller, a flow valve a, a tapping mechanism and a valve d which are sequentially arranged on the feeding pipeline from left to right, and the feeding pipeline is connected to the buffer tank.

[0006] Preferably, the branching mechanism includes a branching pipe arranged on the feed pipeline, a valve e and a hose are arranged on the branching pipe, a connector is connected to one end of the hose, a nut is slidably arranged on the hose, and the connector is fixed to the flushing pipe through a threaded connection between the nut and the flushing pipe.

[0007] Preferably, the exhaust device comprises an exhaust pipeline arranged on the buffer tank, an air intake pipeline is arranged on the exhaust pipeline, a flow valve b is arranged on the air intake pipeline, and a flow valve c is arranged on the exhaust pipeline.

[0008] Preferably, a pressure gauge is provided on the buffer tank.

[0009] Preferably, a discharge pipe is provided at the bottom of the buffer tank, and a valve f is provided on the discharge pipe.

[0010] The utility model has the following advantages: first, nitrogen is filled into the buffer tank through the exhaust device to discharge the air in the buffer tank, and then the slurry barrel containing the slurry catalyst is connected upside down on the upper part of the buffer tank, so that the slurry catalyst in the slurry barrel flows into the buffer tank, and then a thick layer of slurry catalyst remains on the inner wall of the slurry barrel, and hexane is used as a flushing liquid. The hexane enters the flushing pipe through the feeding device to flush the slurry catalyst remaining in the slurry barrel, and then is discharged into the buffer tank. Since hexane has strong volatility, a very small part of the residual hexane in the slurry barrel will also evaporate into the buffer tank, and the hexane and the slurry catalyst in the buffer tank are transported to the downstream styrene production process. The utility model uses hexane as a flushing liquid and hexane is originally a diluent for the slurry catalyst, so that the slurry catalyst in the slurry barrel can be directly flushed to remove the residue after being discharged, and the operation is simple. The flushing liquid will not scratch the slurry barrel and will not affect the subsequent use of the slurry barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a flow chart of the utility model;

[0012] Figure 2 This is an assembly structure diagram of the tapping mechanism and flushing pipe of the utility model.

[0013] Figures: 1 slurry barrel, 2 buffer tank, 3 discharge pipe, 4 feed pipe, 5 flange, 6 valve a, 7 flushing pipe, 8 feed pipeline, 9 valve b, 10 pressure reducing valve, 11 valve c, 12 batch controller, 13 flow valve a, 14 valve d, 15 branch pipe, 16 valve e, 17 hose, 18 connector, 19 nut, 20 exhaust pipeline, 21 intake pipeline, 22 flow valve b, 23 flow valve c, 24 pressure gauge, 25 discharge pipe, 26 valve f. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] Example

[0016] like Figure 1-2 As shown:

[0017] The utility model provides a slurry catalyst unloading device, comprising a slurry barrel 1, wherein the slurry catalyst is contained in the slurry barrel 1, a buffer tank 2 is arranged at the lower side of the slurry barrel 1, a discharge pipe 3 is arranged at the bottom of the slurry barrel 1, the discharge pipe 3 is used for feeding when the slurry barrel 1 is upright, and is used for discharging when it is inverted, a feed pipe 4 is arranged at the upper part of the buffer tank 2, the discharge pipe 3 and the feed pipe 4 are connected by a flange 5, and the discharge pipe 3 and the feed pipe 4 are fixed by the flange 5 when the slurry barrel 1 is inverted, so that the slurry catalyst in the slurry barrel 1 can be discharged along the discharge pipe 4. Pipe 3 and feed pipe 4 enter into buffer tank 2. Valve a6 is provided on feed pipe 4 for controlling the switch of feed pipe 4. Feed device and exhaust device are respectively provided on both sides of feed pipe 4 on buffer tank 2. A flushing pipe 7 with external thread at the end is provided on slurry barrel 1. A tapping mechanism is provided on feed device, which is connected with flushing pipe 7. Nitrogen enters into buffer tank 2 through exhaust device to discharge air in buffer tank 2. Hexane enters into slurry barrel 1 through feed device to flush slurry catalyst remaining on the inner wall of slurry barrel 1.

[0018] The feeding device includes a feeding pipeline 8 and valve b9, a pressure reducing valve 10, a valve c11, a batch controller 12, a flow valve a13, a tapping mechanism and a valve d14 which are sequentially arranged on the feeding pipeline 8 from left to right. The feeding pipeline 8 is connected to the buffer tank 2.

[0019] The branching mechanism includes a branching tube 15 arranged on the feed pipeline 8, on which a valve e16 and a hose 17 are arranged, one end of the hose 17 is connected to a connector 18, a nut 19 is slidably arranged on the hose 17, the connector 18 is fixed to the flushing pipe 7 through the threaded connection between the nut 19 and the flushing pipe 7, the nut 19 on the sliding hose 17 reaches the end of the flushing pipe 7, and then the nut 19 is threadedly connected to the flushing pipe 17 so that the connector and the flushing pipe are fixedly and sealedly connected.

[0020] The exhaust device includes an exhaust pipeline 20 arranged on the buffer tank 2 , an air intake pipeline 21 is arranged on the exhaust pipeline 20 , a flow valve b22 is arranged on the air intake pipeline 21 , and a flow valve c23 is arranged on the exhaust pipeline 20 .

[0021] The buffer tank 2 is provided with a pressure gauge 24 , and the pressure in the buffer tank 2 is monitored by the pressure gauge 24 .

[0022] A discharge pipe 25 is provided at the bottom of the buffer tank 2 , and a valve f26 is provided on the discharge pipe 25 . The mixture of hexane and slurry catalyst in the buffer tank 2 is discharged by opening the valve f26 .

[0023] The working principle of the utility model is as follows:

[0024] Close valve d14, valve a6 and valve f26, open flow valve b22 and flow valve c23, the nitrogen enters the exhaust pipeline 20 through the intake pipeline 21, and then enters the buffer tank 2, then close the flow valve b22, the air in the buffer tank 2 is discharged through the exhaust pipeline 20, and then close the flow valve c23.

[0025] Turn the slurry barrel 1 upside down, quickly move the nut 19 on the hose 17 close to the flushing pipe 7, rotate the nut 19 to thread it into the flushing pipe 7, so that the flushing pipe 7 and the joint 18 are sealed and fixed, close the valve e16, turn the slurry barrel 1 upside down, fix the discharge pipe 3 and the feed pipe 4 through the flange 5, open the valve a6, and allow the slurry catalyst in the slurry barrel 1 to enter the buffer tank 2 through the discharge pipe 3 and the feed pipe 4 for 5 minutes, then close the valve a6, and the slurry catalyst that is difficult to fall off the inner wall of the buffer tank 2 will remain.

[0026] Open valve b9, pressure reducing valve 10, valve c11, flow valve a13 and valve e16, so that the hexane in the feed pipeline 8 enters the branch pipe 15 at a low pressure and a certain flow rate, and then enters the hose 17, the joint 18 and the flushing pipe 7 in sequence, and then enters the slurry barrel 1 to flush the slurry catalyst remaining on the inner wall of the slurry barrel 1. At the same time, the total amount of hexane entering the slurry barrel 1 is controlled by the batch controller 12. After flushing, close valve e16 and open valve a6 to discharge the hexane in the slurry barrel 1 and the flushed residual slurry catalyst into the buffer tank 2. Then close valve a6 and open valve f26 to discharge the hexane and slurry catalyst in the buffer tank 2 through the discharge pipe 25 to the downstream styrene process.

[0027] Open valve 14, and the hexane in the feed pipeline 8 enters the buffer tank 2 to flush the slurry styrene that may remain in the buffer tank 2 and discharge it into the downstream styrene process. The total amount of hexane entering the buffer tank 2 is controlled by the batch controller 12.

[0028] The utility model is simple to operate and convenient to use, and is suitable for comprehensive promotion and application. Although the embodiments of the utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A slurry catalyst unloading device, comprising a slurry barrel (1), characterized in that: A buffer tank (2) is arranged at the lower side of the slurry barrel (1), a discharge pipe (3) is arranged at the bottom of the slurry barrel (1), a feed pipe (4) is arranged at the upper part of the buffer tank (2), the discharge pipe (3) and the feed pipe (4) are connected via a flange (5), a valve a (6) is arranged on the feed pipe (4), a feed device and an exhaust device are arranged on both sides of the feed pipe (4) on the buffer tank (2), a flushing pipe (7) with an external thread at the end is arranged on the slurry barrel (1), and a tapping mechanism is arranged on the feed device, which is connected to the flushing pipe (7).

2. A slurry catalyst unloading device according to claim 1, characterized in that: The feeding device comprises a feeding pipeline (8) and valve b (9), a pressure reducing valve (10), a valve c (11), a batch controller (12), a flow valve a (13), a tapping mechanism and a valve d (14) which are arranged on the feeding pipeline (8) from left to right in sequence. The feeding pipeline (8) is connected to a buffer tank (2).

3. A slurry catalyst unloading device according to claim 2, characterized in that: The branching mechanism comprises a branching pipe (15) arranged on the feed pipeline (8), a valve (16) and a hose (17) are arranged on the branching pipe (15), one end of the hose (17) is connected to a joint (18), a nut (19) is slidably arranged on the hose (17), and the joint (18) is fixed to the flushing pipe (7) through the threaded connection between the nut (19) and the flushing pipe (7).

4. A slurry catalyst unloading device according to claim 1, characterized in that: The exhaust device comprises an exhaust pipeline (20) arranged on a buffer tank (2), an air intake pipeline (21) being arranged on the exhaust pipeline (20), a flow valve b (22) being arranged on the air intake pipeline (21), and a flow valve c (23) being arranged on the exhaust pipeline (20).

5. A slurry catalyst unloading device according to claim 1, characterized in that: The buffer tank (2) is provided with a pressure gauge (24).

6. A slurry catalyst unloading device according to claim 1, characterized in that: A discharge pipe (25) is provided at the bottom of the buffer tank (2), and a valve f (26) is provided on the discharge pipe (25).

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