Automatic ash conveying device

Abstract

The utility model provides an automatic ash conveying device. According to the automatic ash conveying device, the safety problem existing when ash such as carbon black and auto-polymer powder is discharged on site can be avoided through matched operation of a filter, a bin pump, a vacuum pipe, a pressure measuring point, an ash conveying pipe, a nitrogen blowing-away pipe and a quick switching valve. Meanwhile, the device is simple in structure, and automatic control can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ash and slag conveying, and relates to an automatic ash and slag conveying device. Background Art

[0002] Hexafluoropropylene is an organic compound, which is a colorless gas under normal temperature and pressure, and is mainly used for preparing various fluorine-containing fine chemical products, pharmaceutical intermediates, etc.

[0003] Hexafluoropropylene is usually produced by cracking tetrafluoroethylene. During the production process of hexafluoropropylene, ash and slag such as carbon black and self-polymer powder are generated. At present, most of the industry discharges and disposes of the ash and slag on-site, stores them in packaging bags, and then sends them to qualified units for disposal. Since the ash and slag such as carbon black and self-polymer powder generated during the production of hexafluoropropylene from tetrafluoroethylene cracking contain highly toxic octafluoroisobutene, there are relatively large safety risks in the above disposal methods. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an automatic ash and slag conveying device to solve the problem of danger in the treatment of ash and slag generated during the production process of hexafluoropropylene.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an automatic ash and slag conveying device, which includes a filter and a bin pump. Among them, a cracking gas outlet, a cracking gas inlet, and an ash discharge pipe are respectively arranged at the top, side wall, and bottom of the filter; the ash discharge pipe communicates with the top of the bin pump; a filter packing is arranged inside the filter, and the cracking gas inlet is located below the filter packing;

[0007] A vacuum pipe, a pressure measuring point, and an ash and slag conveying pipe are arranged at the top of the bin pump, a nitrogen gas blowing pipe is arranged at the bottom of the bin pump, and the ash and slag conveying pipe communicates with the inner bottom of the bin pump.

[0008] Preferably, a fluidizing plate is arranged at the inner bottom of the bin pump, and the port of the ash and slag conveying pipe is located above the fluidizing plate; fluidizing holes are arranged on the fluidizing plate.

[0009] Preferably, a protective cover is arranged at the top of the nitrogen gas blowing pipe, and the port of the nitrogen gas blowing pipe is located below the fluidizing plate.

[0010] Preferably, the device further includes a nitrogen gas boosting pipe, and the nitrogen gas boosting pipe communicates with the vacuum pipe.

[0011] Preferably, quick cut valves are arranged on the ash discharge pipe, the vacuum pipe, the nitrogen gas boosting pipe, the ash and slag conveying pipe, and the nitrogen gas blowing pipe.

[0012] Preferably, a level gauge is also provided at the top of the bin pump.

[0013] Preferably, a flowmeter is provided on the ash and slag conveying pipe.

[0014] The utility model has the following beneficial effects:

[0015] The utility model provides an automatic ash and slag conveying device. Through the coordinated operation of a filter, a bin pump, a vacuum pipe, a pressure measuring point, an ash and slag conveying pipe, a nitrogen blowing pipe, a quick cut valve, etc., the device can avoid the safety problems existing in the on-site discharge of ash and slag such as carbon black and self-polymer powder. At the same time, the device has a simple structure and can realize automatic control. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the automatic ash and slag conveying device provided by the embodiment of the present application;

[0017] Figure 2 It is a schematic structural diagram of the bottom inside the bin pump provided by the embodiment of the present application;

[0018] Symbol representation:

[0019] 1 - Filter, 2 - Bin pump, 3 - Pyrolysis gas outlet, 4 - Pyrolysis gas inlet, 5 - Ash discharge pipe, 6 - Vacuum pipe, 7 - Pressure measuring point, 8 - Ash and slag conveying pipe, 9 - Nitrogen blowing pipe, 10 - Fluidization disk, 11 - Fluidization hole, 12 - Protective cover, 13 - Nitrogen boosting pipe, 14 - Quick cut valve, 15 - Level gauge, 16 - Filter packing, 17 - Flowmeter. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to the attached Figure 1 and the attached Figure 1 which show a schematic structural diagram of the automatic ash and slag conveying device provided by the embodiment of the present application. As can be seen from the attached Figure 1 the automatic ash and slag conveying device provided by the embodiment of the present application includes a filter 1 and a bin pump 2. Among them, the filter 1 is used to filter ash and slag such as carbon black and self-polymer powder, and the bin pump 2 is used to convey ash and slag such as carbon black and self-polymer powder through vacuum and nitrogen injection.

[0022] In an embodiment of the present application, a cracking gas outlet 3, a cracking gas inlet 4, and an ash discharge pipe 5 are respectively provided at the top, side wall, and bottom of the filter 1. A filter packing 16 is provided inside the filter 1. The ash discharge pipe 5 communicates with the top of the silo pump 2, and the cracking gas inlet 4 is located below the filter packing 16. The cracking gas mixed with ash slag enters the filter 1 through the cracking gas inlet 4. After being filtered by the filter packing 16, the cracking gas is discharged through the cracking gas outlet 3, and the ash slag generated by filtration enters the silo pump 2 through the ash discharge pipe 5.

[0023] At the top of the silo pump 2, a vacuum pipe 6, a pressure measurement point 7, an ash slag conveying pipe 8, and a level gauge 15 are provided. At the bottom of the silo pump 2, a nitrogen blowing pipe 9 is provided, and the ash slag conveying pipe 8 communicates with the inner bottom of the silo pump 2. Among them, the vacuum pipe 6 is used to make the inside of the silo pump 2 in a vacuum state; the pressure measurement point 7 is used to measure the pressure inside the silo pump 2, so as to facilitate the switching of each pipeline such as vacuum, nitrogen, and ash discharge. The ash slag conveying pipe 8 is used to discharge the ash slag deposited at the bottom of the silo pump 2. A flow meter 17 is provided on the ash slag conveying pipe 8 to facilitate monitoring the conveying flow rate of the ash slag. The level gauge 15 is used to monitor the accumulation amount of ash slag in the silo pump 2.

[0024] In addition, a fluidizing plate 10 is provided at the inner bottom of the silo pump 2, and fluidizing holes 11 are provided on the fluidizing plate 10, as shown in the appendix Figure 2 The nitrogen gas blown into the silo pump 2 from the bottom through the nitrogen blowing pipe 9 passes through the fluidizing holes 11 and through the fluidizing plate 10, thereby fluidizing and blowing the ash slag falling on the fluidizing plate 10, so that the blown ash slag is discharged outside the silo pump 2 through the ash slag conveying pipe 8.

[0025] In an embodiment of the present application, the port of the ash slag conveying pipe 8 is located above the fluidizing plate 10 to facilitate sucking the ash slag blown by the nitrogen blowing pipe 9. In addition, a protective cover 12 is provided at the top of the nitrogen blowing pipe 9, and the port of the nitrogen blowing pipe 9 is located below the fluidizing plate 10. The protective cover 12 is used to prevent the ash slag from blocking the pipe orifice of the nitrogen blowing pipe 9.

[0026] In an embodiment of the present application, the ash slag automatic conveying device further includes a nitrogen boosting pipe 13, which communicates with the vacuum pipe 6 and is used to introduce nitrogen gas into the silo pump 2, so as to maintain a stable pressure inside the silo pump 2. For the convenience of switching each pipeline, quick cut valves 14 are provided on the ash discharge pipe 5, the vacuum pipe 6, the nitrogen boosting pipe 13, the ash slag conveying pipe 8, and the nitrogen blowing pipe 9.

[0027] The use process of the ash slag automatic conveying device provided by the embodiment of the present application is as follows:

[0028] Slag such as carbon black and self-polymer powder enters the interior of the filter 1 through the cracking gas inlet 4. Under the upward action of the cracking gas, the slag is filtered and intercepted by the filter packing 16 located above the cracking gas inlet 4 and then falls to the bottom of the filter 1; the filtered cracking gas is discharged through the cracking gas outlet 3. The slag that has fallen to the bottom of the filter 1 enters the interior of the bin pump 2 through the ash discharge pipe 5. When the level gauge 15 at the top of the bin pump 2 detects that the slag content inside the bin pump 2 reaches 30% of the volume of the bin pump 2, the quick cut-off valve 14 on the ash discharge pipe 5 is closed, and at the same time, the quick cut-off valve 14 on the nitrogen blowing pipe 9 is opened, and nitrogen is blown into the bin pump 2 through the nitrogen blowing pipe 9 to blow the slag deposited at the bottom of the bin pump 2. When the pressure measuring point 7 detects that the pressure inside the bin pump 2 reaches 0.3 MPa, the quick cut-off valve 14 on the nitrogen blowing pipe 9 is closed, and the quick cut-off valve 14 on the ash slag conveying pipe 8 is opened. At this time, the slag is conveyed to the incinerator through the ash slag conveying pipe 8 for incineration.

[0029] When the pressure measuring point 7 detects that the pressure inside the bin pump 2 is less than 0.3 MPa, the quick cut-off valve 14 on the nitrogen booster pipe 13 is opened to maintain the pressure inside the bin pump 2 at 0.3 MPa. When the flowmeter 17 on the ash slag conveying pipe 8 shows a flow rate of 0, the quick cut-off valve 14 on the nitrogen booster pipe 13 is closed. When the pressure measuring point 7 detects that the pressure inside the bin pump 2 is 0.05 MPa, the quick cut-off valve 14 on the ash slag conveying pipe 8 is closed, and at the same time, the quick cut-off valve 14 on the vacuum pipe 6 is opened. At this time, the interior of the bin pump 2 starts to be evacuated. When the pressure measuring point 7 detects that the pressure inside the bin pump 2 is -0.85 MPa, the quick cut-off valve 14 on the vacuum pipe 6 is closed, and at the same time, the quick cut-off valve 14 on the ash discharge pipe 5 is opened. At this time, the bin pump 2 switches to the normal ash receiving state.

[0030] The ash slag automatic conveying device provided by the embodiment of the present application can avoid the safety problems existing in the on-site discharge of slag such as carbon black and self-polymer powder through the above operations. At the same time, the device has a simple structure and can achieve automatic control.

[0031] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An automatic ash conveying device, characterized in that, It includes a filter (1) and a bin pump (2), wherein, The top, side wall and bottom of the filter (1) are respectively provided with a cracked gas outlet (3), a cracked gas inlet (4) and an ash discharge pipe (5); the ash discharge pipe (5) communicates with the top of the bin pump (2); a filter packing (16) is arranged inside the filter (1), and the cracked gas inlet (4) is located below the filter packing (16); The top of the bin pump (2) is provided with a vacuum pipe (6), a pressure measuring point (7) and an ash and slag conveying pipe (8), the bottom of the bin pump (2) is provided with a nitrogen blowing pipe (9), and the ash and slag conveying pipe (8) communicates with the inner bottom of the bin pump (2).

2. The automatic ash conveying device according to claim 1, wherein A fluidizing disk (10) is arranged at the inner bottom of the bin pump (2), and the port of the ash and slag conveying pipe (8) is located above the fluidizing disk (10); fluidizing holes (11) are arranged on the fluidizing disk (10).

3. The automatic ash conveying device according to claim 2, characterized in that, A protective cover (12) is arranged at the top of the nitrogen blowing pipe (9), and the port of the nitrogen blowing pipe (9) is located below the fluidizing disk (10).

4. The automatic ash conveying device according to claim 1, characterized in that The device further includes a nitrogen boosting pipe (13), and the nitrogen boosting pipe (13) communicates with the vacuum pipe (6).

5. The automatic ash conveying device according to claim 4, characterized in that, Quick cut valves (14) are arranged on the ash discharge pipe (5), the vacuum pipe (6), the nitrogen boosting pipe (13), the ash and slag conveying pipe (8) and the nitrogen blowing pipe (9).

6. The automatic ash conveying device according to claim 1, characterized in that A level gauge (15) is further arranged at the top of the bin pump (2).

7. The automatic ash conveying device according to claim 1, characterized in that A flowmeter (17) is arranged on the ash and slag conveying pipe (8).

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