Purging device for filter at bottom of crude epoxypropane tower

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a purging device for a filter at the bottom of a crude epoxypropane tower, which comprises a filter body, a material returning pipe orifice for discharging filtered materials is arranged at the bottom of the filter body, a water outlet is arranged on the outer surface of the material returning pipe orifice, and a water outlet is arranged on the outer surface of the water outlet. A conveying assembly for conveying nitrogen and a water source into the filter body is arranged outside the filter body, and a purging assembly for purging materials in the filter body is arranged in the filter body. A pressure gauge for monitoring the air pressure in the filter body is mounted at the top of the filter body. According to the embodiment of the utility model, the nitrogen line pipe, the conveying line pipe, the material returning pipe orifice, the water outlet and the four valves are additionally arranged, so that impurity materials in the filter body are respectively purged, flushed and discharged, and accumulated impurities in the filter body are effectively reduced, so that the disassembly and cleaning frequency is reduced, and the on-site pollution during disassembly and cleaning of the filter body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a purge device for a bottom filter of a crude propylene oxide tower. Background Art

[0002] In the chemical production process, the crude PO (propylene oxide) tower is a common equipment used for preliminary treatment of chemical substances. At the bottom of the crude PO tower, a filter is usually set to remove impurities. The crude PO tower bottom outlet filter is a filter used to filter salt impurities at the bottom of the PO tower.

[0003] In order to provide sufficient switching cycles, the filter equipment has a lot of material in it, so it is necessary to clean the filter regularly. The existing technology discharges a large amount of material through the return pipeline, and then uses iron barrels and oil-absorbing felt to collect the material, which not only causes process material loss, but also the material inside the filter is not discharged cleanly, causing methyl benzyl alcohol to leak on site and produce a strong odor, polluting the environment and damaging the health of on-site personnel. Methyl benzyl alcohol is a moderately toxic chemical that has a great impact on human health. A filter purge device that can cleanly discharge the material inside the filter is needed.

[0004] In view of this, the utility model provides a purge device for a bottom filter of a crude propylene oxide tower. Utility Model Content

[0005] The purpose of the utility model is to solve the above shortcomings and provide a crude propylene oxide tower bottom filter purge device to solve the problems raised by the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crude propylene oxide tower bottom filter purging device, comprising a filter body, a material return pipe opening for discharging filtered materials is installed at the bottom of the filter body, a drain port is installed on the outer surface of the material return pipe opening, a conveying component for conveying nitrogen and water to the inside of the filter body is arranged on the outside of the filter body, and a purging component for purging materials inside the filter body is arranged on the inside of the filter body.

[0007] As a further improvement of the technical solution, a pressure gauge for monitoring the air pressure in the tower is installed on the top of the filter body.

[0008] As a further improvement of the present technical solution, the delivery assembly includes a delivery line pipe for transporting nitrogen and water source into the filter body, a nitrogen line pipe for transporting nitrogen is fixedly installed on the outer surface of the delivery line pipe, a closing valve 1 for closing the line pipe is installed inside the delivery line pipe, and a closing valve 2 is installed inside the nitrogen line pipe, and the closing valve 1 and the closing valve 2 control the delivery interval of the water source and nitrogen in the delivery line pipe.

[0009] As a further improvement of the technical solution, a docking port is provided on the outer surface of the filter body, and the docking port is docked and installed with one end of the conveying line pipe.

[0010] As a further improvement of the technical solution, the purge assembly includes a cross-shaped purge pipe, and a plurality of nozzles for spraying nitrogen and water are provided at the bottom of the purge pipe.

[0011] As a further improvement of the technical solution, a docking tube is installed at one end of the purge tube, and the docking tube is fixedly installed at the other end of the docking port inside the filter body. The purge tube sprays the nitrogen and water source delivered to the docking port.

[0012] As a further improvement of the technical solution, a valve 1 for closing the pipeline of the material return pipe outlet is installed inside the material return pipe outlet, and a valve 2 for closing the pipeline of the drainage outlet is installed inside the drainage outlet.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. In the purging device of the bottom filter of the crude propylene oxide tower, when cleaning the impurity materials in the filter body, open the valve 1 on the material return pipe port, transport nitrogen into the nitrogen line pipe, open the closing valve 2, at this time the closing valve 1 is closed, nitrogen is transported from the nitrogen line pipe to the transport line pipe, and docked to the docking port, so that the nitrogen is transported into the filter body, and the nitrogen is purged in the filter body, and the material impurities are discharged and collected through the material return pipe port. By observing the pressure gauge on the top of the filter body, when the pressure gauge drops to 0.3MPa, it means that the impurities in the filter body are completely withdrawn, close the closing valve 2 and the valve 1 on the material return pipe port, open the closing valve 1, Allow the connected water source to flow into the filter body from one end of the conveying line pipe. Soak the filter body with water and rinse it for 30 minutes. Then open valve 2 on the drain outlet to allow the flushing water source to flow out of the drain outlet. The conveying line pipe continues to convey water source for flushing for ten minutes. Then close valve 1 and the water source is completely discharged from the drain outlet. Open valve 2 again and purge the filter body with nitrogen. When the pressure gauge pressure drops to positive pressure, it means that the flushing water in the filter body has been drained. Continue to purge for 3 minutes, then close valve 2 and valve 2 on the drain outlet to achieve the effect of thoroughly purging and discharging the impurities in the filter body. It can be safely disassembled and cleaned.

[0015] 2. In the purging device for the bottom filter of the crude propylene oxide tower, the material filtered in the filter body is discharged through the material return pipe port, the conveying component conveys water and nitrogen to the purging component, and the residual material in the filter body is thoroughly purged and cleaned. The pressure gauge on the filter body can monitor the air pressure in the filter body, so as to judge whether the impurities in the filter body are discharged cleanly, effectively reducing the accumulation of impurities in the filter body, thereby reducing the frequency of dismantling and cleaning, and reducing the on-site pollution when dismantling and cleaning the filter body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is described in more detail below by way of example with reference to the accompanying drawings, in which:

[0017] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0018] Figure 2 It is a three-dimensional schematic diagram of the material withdrawal nozzle of the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of the purge assembly of the present utility model.

[0020] The meanings of the numbers in the figure are as follows: 1. filter body; 2. pressure gauge; 3. material return pipe port; 31. drain port; 4. conveying assembly; 401. conveying line pipe; 402. nitrogen line pipe; 403. closing valve one; 404. closing valve two; 5. purge assembly; 501. purge pipe; 502. nozzle; 6. docking port; 7. docking pipe. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] like Figure 1-2 As shown, a purging device for the bottom filter of a crude propylene oxide tower comprises a filter body 1, a material return pipe 3 for discharging filtered materials is installed at the bottom of the filter body 1, a drain port 31 is installed on the outer surface of the material return pipe 3, a conveying assembly 4 for conveying nitrogen and water to the inside of the filter body 1 is arranged outside the filter body 1, and a purging assembly 5 for purging the materials inside the filter body 1 is arranged inside the filter body 1. A pressure gauge 2 for monitoring the air pressure in the tower is installed on the top of the filter body 1.

[0023] The filtered material in the filter body 1 is discharged through the return pipe port 3, and the conveying component 4 conveys water and nitrogen to the purging component 5 to thoroughly purge and clean the residual material in the filter body 1. The pressure gauge 2 on the filter body 1 can monitor the air pressure in the filter body 1, so as to judge whether the impurities in the filter body 1 are discharged cleanly, effectively reducing the accumulated impurities in the filter body 1, thereby reducing the disassembly and cleaning frequency, and reducing the on-site pollution when the filter body 1 is disassembled and cleaned.

[0024] First, the specific structure of the conveying component 4 is disclosed. The conveying component 4 includes a conveying line pipe 401 for conveying nitrogen and water source into the filter body 1. A nitrogen line pipe 402 for conveying nitrogen is fixedly installed on the outer surface of the conveying line pipe 401. A closing valve 1 403 for closing the line pipe is installed inside the conveying line pipe 401. A closing valve 2 404 is installed inside the nitrogen line pipe 402. The closing valve 1 403 and the closing valve 2 404 control the conveying interval of the water source and the nitrogen in the conveying line pipe 401.

[0025] The outer surface of the filter body 1 is provided with a docking port 6, which is docked with one end of the conveying line pipe 401. A valve 1 for closing the pipe of the material return pipe 3 is installed inside the material return pipe 3, and a valve 2 for closing the pipe of the water discharge port 31 is installed inside the water discharge port 31.

[0026] When cleaning the impurity materials in the filter body 1, open valve 1 on the material return pipe 3, and transport nitrogen to the nitrogen line pipe 402 through the air compressor outside the filter body 1, open the closing valve 2 404, at this time, the closing valve 1 403 is closed, and the nitrogen is transported from the nitrogen line pipe 402 to the delivery line pipe 401, and docked to the docking port 6, so that the nitrogen is transported into the filter body 1, and the nitrogen is purged in the filter body 1, and the material impurities are discharged and collected through the material return pipe 3. By observing the pressure gauge 2 on the top of the filter body 1, when the pressure gauge 2 drops to 0.3MPa, it means that the material impurities in the filter body 1 are completely withdrawn, close the closing valve 2 404 and the valve 1 on the material return pipe 3, open the closing valve 1 403, Allow the connected water source to flow from one end of the delivery line pipe 401 into the interior of the filter body 1. The water source soaks and rinses the filter body 1. After maintaining for 30 minutes, open valve 2 on the drain port 31 to allow the flushing water source to flow out of the drain port 31, and continue to deliver water in the delivery line pipe 401 to maintain flushing for ten minutes. Close valve 1 403, and the water source is completely discharged from the drain port 31. Open closing valve 2 404 again, and purge the interior of the filter body 1 with nitrogen. After the pressure of pressure gauge 2 drops to positive pressure, it means that the flushing water in the filter body 1 has been drained. After continuing to purge for 3 minutes, close closing valve 2 404 and valve 2 on the drain port 31 to achieve the effect of thoroughly purging and discharging impurities in the filter body 1, and it can be safely disassembled and cleaned.

[0027] Due to the prior art, how to discharge and flush the nitrogen and water source delivered to the filter body 1, Figure 3 A second embodiment of the present utility model is shown.

[0028] The specific structure of the purge assembly 5 is disclosed again. The purge assembly 5 includes a cross-shaped purge pipe 501, and a plurality of nozzles 502 for spraying nitrogen and water are provided at the bottom of the purge pipe 501. A docking pipe 7 is installed at one end of the purge pipe 501, and the docking pipe 7 is fixedly installed at the other end of the docking port 6 inside the filter body 1. The purge pipe 501 sprays the nitrogen and water delivered by the docking port 6.

[0029] One end of the purge pipe 501 is butt-connected and installed on the docking port 6 through the docking pipe 7, so that the purge pipe 501 is installed in the filter body 1 in a cross shape, and the delivered nitrogen can be sprayed out through the multiple nozzles 502 opened at the bottom of the purge pipe 501, and the impurities remaining in the filter body 1 can be evenly sprayed. Then, the water source is evenly sprayed through the purge pipe 501 to flush and discharge the purged impurities, so as to achieve the effect of evenly spraying the delivered nitrogen and water source, so that the purge pipe 501 can more efficiently purge the impurities with the delivered nitrogen and water source.

[0030] In summary, the working principle of this solution is as follows:

[0031] When cleaning the impurity materials in the filter body 1, open valve 1 on the material return pipe 3, and transport nitrogen to the nitrogen line pipe 402 through the air compressor outside the filter body 1, open the closing valve 2 404, at this time, the closing valve 1 403 is closed, and the nitrogen is transported from the nitrogen line pipe 402 to the delivery line pipe 401, and docked to the docking port 6, so that the nitrogen is transported into the filter body 1, and the nitrogen is purged in the filter body 1, and the material impurities are discharged and collected through the material return pipe 3. By observing the pressure gauge 2 on the top of the filter body 1, when the pressure gauge 2 drops to 0.3MPa, it means that the material impurities in the filter body 1 are completely withdrawn, close the closing valve 2 404 and the valve 1 on the material return pipe 3, open the closing valve 1 403, The connected water source flows into the filter body 1 from one end of the delivery line pipe 401, and the water source soaks and rinses the filter body 1. After 30 minutes, open the second valve on the drain port 31 to allow the flushing water source to flow out from the drain port 31, and the water source is continuously delivered in the delivery line pipe 401 to keep flushing for ten minutes. After closing the first valve 403, the water source is completely discharged from the drain port 31, and the second closing valve 404 is opened again, and the nitrogen is purged inside the filter body 1. After the pressure of the pressure gauge 2 drops to a positive pressure, it means that the flushing water in the filter body 1 has been drained. After continuing to purge for 3 minutes, close the second closing valve 404 and the second valve on the drain port 31 to achieve the effect of thoroughly purging and discharging the impurities in the filter body 1, and it can be safely disassembled and cleaned;

[0032] One end of the purge pipe 501 is butt-connected and installed on the docking port 6 through the docking pipe 7, so that the purge pipe 501 is installed in the filter body 1 in a cross shape, and the delivered nitrogen can be sprayed out through the multiple nozzles 502 opened at the bottom of the purge pipe 501, and the impurities remaining in the filter body 1 can be evenly sprayed. Then, the water source is evenly sprayed through the purge pipe 501 to flush and discharge the purged impurities, so as to achieve the effect of evenly spraying the delivered nitrogen and water source, so that the purge pipe 501 can more efficiently purge the impurities with the delivered nitrogen and water source.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A crude propylene oxide tower bottom filter purge device, comprising a filter body (1), characterized in that: The bottom of the filter body (1) is provided with a material return pipe opening (3) for discharging filtered material, the outer surface of the material return pipe opening (3) is provided with a water discharge port (31), the outside of the filter body (1) is provided with a conveying component (4) for conveying nitrogen and water source to the inside of the filter body (1), and the inside of the filter body (1) is provided with a purge component (5) for purging the material inside the filter body (1).

2. The crude propylene oxide tower bottom filter purge device according to claim 1, characterized in that: A pressure gauge (2) for monitoring the air pressure in the filter body (1) is installed on the top of the filter body (1).

3. The crude propylene oxide tower bottom filter purge device according to claim 1, characterized in that: The delivery assembly (4) comprises a delivery line pipe (401) for delivering nitrogen and water into the filter body (1); a nitrogen line pipe (402) for delivering nitrogen is fixedly mounted on the outer surface of the delivery line pipe (401); a closing valve 1 (403) for closing the line pipe is mounted inside the delivery line pipe (401); a closing valve 2 (404) is mounted inside the nitrogen line pipe (402); the closing valve 1 (403) and the closing valve 2 (404) control the delivery interval of the water source and the nitrogen in the delivery line pipe (401).

4. The crude propylene oxide tower bottom filter purge device according to claim 1, characterized in that: The outer surface of the filter body (1) is provided with a docking port (6), and the docking port (6) is docked and installed with one end of the conveying line pipe (401).

5. The crude propylene oxide tower bottom filter purge device according to claim 1, characterized in that: The purge assembly (5) comprises a cross-shaped purge pipe (501), and a plurality of nozzles (502) for spraying nitrogen and water are provided at the bottom of the purge pipe (501).

6. The crude propylene oxide tower bottom filter purge device according to claim 5, characterized in that: A docking tube (7) is installed at one end of the purge tube (501), and the docking tube (7) is fixedly installed at the other end of the docking port (6) inside the filter body (1). The purge tube (501) sprays nitrogen and water source delivered by the docking port (6).

7. The crude propylene oxide tower bottom filter purge device according to claim 1, characterized in that: A valve 1 for closing the pipeline of the material return pipe opening (3) is installed inside the material return pipe opening (3), and a valve 2 for closing the pipeline of the water discharge port (31) is installed inside the water discharge port (31).

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