A filter

Abstract

The present invention relates to the technical field of pyrolysis tar, and particularly relates to a filter, which includes a filter body, a pressure gauge is arranged on the filter body; a main sewage discharge pipeline is arranged at the bottom of the filter body, a cut-off valve is arranged at the lower end of the main sewage discharge pipeline, a field pressure gauge and a remote pressure gauge are arranged on the main sewage discharge pipeline, and the remote pressure gauge and the cut-off valve are interlocked; an oil sewage tank pipeline is arranged on one side of the main sewage discharge pipeline, and the inlet end of the oil sewage tank pipeline is communicated with the main sewage discharge pipeline; a cleaning pipeline is arranged on the other side of the main sewage discharge pipeline, and the outlet end of the cleaning pipeline is communicated with the main sewage discharge pipeline; the first outlet end of the steam pipeline is communicated with the oil sewage tank pipeline; the second outlet end of the steam pipeline is communicated with the cleaning pipeline. The present invention can not only reduce the cleaning time of the filter, increase the process operation cycle, but also reduce the number of times of switching the filter, and also solve the problem that two filters are blocked simultaneously, resulting in the process running at a reduced load.

Description

Technical Field

[0001] The present invention relates to the technical field of pyrolysis tar, and particularly to a filter. Background Art

[0002] In the pulverized coal pyrolysis process, the pulverized coal undergoes a rapid pyrolysis reaction in the reactor to generate oil and gas. The oil and gas are separated in the fractionating tower, and the separated pyrolysis tar is sent out from the bottom of the fractionating tower. Since the tar separated at the bottom of the fractionating tower is relatively heavy and also carries pulverized coke, if it directly enters the pump, it will cause wear of the pump impeller, greatly reducing the service life of the pump. Moreover, too much solid content in the tar will also cause blockage of the pipeline.

[0003] Therefore, two filters are provided at the inlet of the pump, and the two filters are used as spares for each other to reduce the solid content in the tar. However, long-term operation will cause blockage of the filters, and the pyrolysis tar will solidify after dropping to a certain temperature, increasing the cleaning difficulty. Due to the high solid content in the tar, it is possible that the standby filter has not been cleaned up yet, and the running filter has already become blocked, resulting in the process being forced to reduce the load until the filter is cleaned up. Summary of the Invention

[0004] In view of the above deficiencies of the prior art, a filter provided by the present invention can quickly drain sewage when the filter is blocked by providing a sewage main pipeline at the bottom of the filter body. The sewage main pipeline is connected to the sewage oil tank pipeline and the cleaning pipeline, solving the problem of long cleaning time for filter blockage.

[0005] A filter provided by the present invention includes a filter body, and further includes:

[0006] A pressure detection component, provided on the filter body;

[0007] A sewage main pipeline, provided below the filter body. The upper end of the sewage main pipeline is communicated with the bottom of the filter body, and a cut-off valve is provided at the lower end of the sewage main pipeline;

[0008] A sewage oil tank pipeline, provided on one side of the sewage main pipeline. The inlet end of the sewage oil tank pipeline is communicated with the sewage main pipeline;

[0009] A cleaning pipeline, provided on one side of the sewage main pipeline. The outlet end of the cleaning pipeline is communicated with the sewage main pipeline.

[0010] Preferably, a field pressure gauge and a remote pressure gauge are provided on the sewage main pipeline. The remote pressure gauge interlocks to control the opening and closing of the cut-off valve. When the pressure detected by the remote pressure gauge is higher than the set value, the cut-off valve is interlocked to open.

[0011] Preferably, two first valves are provided at the upper end of the main sewage pipeline. The lower end of the main sewage pipeline is connected to two branch pipes. A second valve is provided on one of the branch pipes, and the cut-off valve is provided on the other branch pipe. The on-site pressure gauge and the remote pressure gauge are provided between the first valve and the branch pipe.

[0012] Preferably, a steam pipeline is provided on one side of the main sewage pipeline. The first outlet end of the steam pipeline is communicated with the sewage oil tank pipeline, and a third valve is provided at the first outlet end of the steam pipeline.

[0013] Preferably, a second outlet end is provided on the steam pipeline. The second outlet end is communicated with the cleaning pipeline, and a fourth valve is provided at the second outlet end of the steam pipeline.

[0014] Preferably, a fifth valve is provided on the sewage oil tank pipeline, and the fifth valve is located on the side of the first outlet end of the steam pipeline away from the main sewage pipeline.

[0015] Preferably, a sixth valve is provided on the cleaning pipeline, and the sixth valve is located on the side of the second outlet end of the steam pipeline away from the main sewage pipeline.

[0016] Preferably, an oil filter tank is provided below the outlets of the two branch pipes.

[0017] Compared with the prior art, the filter provided by the present invention has the following beneficial effects:

[0018] 1. By providing a main sewage pipeline at the bottom of the filter body in the present invention, when the pressure detection component on the filter body detects an increase in the pressure inside the filter body, it indicates that the filter body is blocked. The sewage oil is discharged into the sewage oil tank through the main sewage pipeline and the sewage oil tank pipeline. The cut-off valve can automatically drain the sewage from the main sewage pipeline. After the sewage discharge is completed, the sewage pipeline is cleaned through the cleaning pipeline. This not only reduces the cleaning time of the filter, effectively increases the operation cycle of the process, but also solves the problem that the process operates at a reduced load due to the simultaneous blockage of two filters.

[0019] 2. The filter designed in the present invention can reduce the number of filter switches, shorten the cleaning time of the standby filter, and also solve the problem of simultaneous blockage of two filters. At the same time, the filter is easy to install, the materials used are easy to obtain, the price is low, and the production is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present invention.

[0021] Description of the reference numerals:

[0022] 1. Pyrolysis tar inlet pipeline; 2. Pyrolysis tar outlet pipeline; 3. Filter body; 4. Main sewage pipeline; 41. First valve; 43. Second valve; 44. Cut-off valve; 5. Cleaning pipeline; 51. Sixth valve; 6. Sewage oil tank pipeline; 61. Fifth valve; 7. Steam pipeline; 71. Third valve; 72. Fourth valve; 8. Oil filter tank. Specific embodiments

[0023] The following combines with the attached Figure 1 , and describes the specific embodiments of the present invention in detail, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0024] As Figure 1 shown, a filter provided by the present invention includes: a pyrolysis tar inlet pipeline 1, a pyrolysis tar outlet pipeline 2, a filter 3, a main sewage pipeline 4, a cleaning pipeline 5, a sewage oil tank pipeline 6, a steam pipeline 7, and an oil filter tank 8.

[0025] During normal process operation, pyrolysis tar enters the filter body 3 through the pyrolysis tar inlet pipeline 1 and is then sent to downstream equipment through the pyrolysis tar outlet pipeline 2. The inlet and outlet pipelines are respectively located above the two side plates of the filter body 3.

[0026] A pressure detection component is provided on the filter body 3. The pressure detection component is a pressure gauge installed on the top of the filter body 3. By observing the change of the pressure gauge, it can be judged whether the filter is operating normally and whether there is a blockage; a main sewage pipeline 4 is also provided at the bottom of the filter body 3.

[0027] Three manual valves are installed on the main sewage pipeline 4, two first valves 41 connected in series near the filter end, a second valve 43 arranged at the end of the main sewage pipeline 4, and a pneumatic cut-off valve 44. The first valve 41 is installed close to the filter body 3, and the second valve 43 and the pneumatic cut-off valve 44 are at the end of the main sewage pipeline 4. The second valve 43 is for manual sewage discharge, and the pneumatic cut-off valve 44 is for automatic sewage discharge. An oil filter tank 8 is provided below the second valve 43 and the pneumatic cut-off valve 44 to collect the slag in the main sewage pipeline 4.

[0028] Below the first valve 41, a local pressure gauge and a remote pressure gauge are also provided. The remote pressure gauge is used for interlocking control of the on-off of the cut-off valve 44. The smoothness of sewage discharge from the sewage main pipeline 4 can be judged by observing the change of the local pressure gauge. The sewage oil tank pipeline 6 can timely discharge the sewage oil of the filter body 3 to the underground sewage oil tank. The function of the cleaning pipeline 5 is to introduce semi-coke oil to clean the pipeline when the sewage discharge of the sewage main pipeline 4 is not smooth, reduce the solid content of the oil in the pipeline, and the filter residue after cleaning is discharged to the oil filter tank 8 through the second valve 43. A steam pipeline 7 is respectively connected to the cleaning pipeline 5 and the sewage oil tank pipeline 6 to clean the cleaning pipeline 5 and the sewage oil tank pipeline 6, preventing the residual oil in the pipeline from solidifying at low temperature and causing blockage of the pipeline.

[0029] Usage

[0030] First, establish a circulation through the pyrolysis tar inlet pipeline 1, the filter body 3, and the pyrolysis tar outlet pipeline 2. Observe the pressure of the pressure gauge on the top of the filter body 3, open the fifth valve 61 of the sewage main pipeline 4 to the sewage oil tank pipeline 6 to open the process, and then open the first two first valves 4 of the sewage main pipeline 4, and observe the pressure of the sewage main pipeline 4 through the local pressure gauge;

[0031] When the pressure of the filter body 3 is normal but the pressure of the sewage main pipeline 4 is high, it indicates that the sewage discharge of the sewage main pipeline 4 is not smooth. At this time, the remote pressure gauge interlocks to control the opening of the pneumatic cut-off valve 44 to discharge sewage from the sewage main pipeline 4. When the pressure drops to the normal range, close the pneumatic cut-off valve 44, and the sewage discharge ends;

[0032] Observe the pressure of the sewage main pipeline 4 through the local pressure gauge. If the pressure does not continue to drop, it indicates that the sewage main pipeline 4 is blocked. At this time, manual sewage discharge is required. The operation is as follows: close the first two first valves 41 of the sewage main pipeline 4, open the third valve 71 of the steam pipeline 7 to blow the sewage oil tank pipeline 6, and at the same time observe the pressure gauge of the sewage main pipeline 4;

[0033] If the pressure still does not drop, it indicates that the sewage main pipeline 4 is severely blocked. At this time, close the fifth valve 61 of the sewage oil tank pipeline 6 and the third valve 71 on the steam pipeline 7, open the sixth valve 51 of the cleaning pipeline 5 and the second valve 43 of the sewage main pipeline 4 to clean the pipeline, and discharge the filter residue to the oil filter tank 8;

[0034] When the sewage discharge through the second valve 43 is relatively smooth and the pressure drops to the normal range, it indicates that the pipeline is unblocked. Close the sixth valve 51 of the cleaning pipeline 5, and at the same time open the fourth valve 72 of the steam pipeline 7 to blow the pipeline. When the steam is discharged from the second valve 43, the sewage pipeline cleaning is completed. Then close the steam pipeline 72, close the second valve 43 of the sewage main pipeline 4, open the fifth valve 61 of the sewage oil tank pipeline 6, and finally slowly open the first two first valves 41 of the sewage main pipeline 4.

[0035] In this embodiment, by designing a filter that can be cleaned online, not only can the cleaning time of the filter be reduced, the process operation cycle be increased, the number of filter switches be reduced, but also the problem that two filters are blocked simultaneously, resulting in the process running at a reduced load can be solved. At the same time, this filter is easy to install, made of simple materials, inexpensive, and has simple operation.

[0036] The above-disclosed are only the preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A filter, comprising a filter body (3), characterized in that, Also includes: A pressure detection component is arranged on the filter body (3); A sewage main line (4) is arranged below the filter body (3); the upper end of the sewage main line (4) is connected to the bottom of the filter body (3); a cut-off valve (44) is arranged at the lower end of the sewage main line (4); an on-site pressure gauge and a remote pressure gauge are arranged on the sewage main line (4); the remote pressure gauge interlocks and controls the switch of the cut-off valve (44); when the pressure detected by the remote pressure gauge is higher than the set value, the interlock controls the cut-off valve (44) to open; two first valves (41) are arranged at the upper end of the sewage main line (4); the lower end of the sewage main line (4) is connected to two branch pipes, one of which is provided with a second valve (43); and the cut-off valve (44) is arranged on the other branch pipe; the on-site pressure gauge and the remote pressure gauge are arranged between the first valve (41) and the branch pipe; The waste oil tank pipeline (6) is arranged on one side of the sewage main line (4), and the inlet end of the waste oil tank pipeline (6) is connected to the sewage main line (4); The cleaning pipeline (5) is arranged on one side of the sewage main line (4), and the outlet end of the cleaning pipeline (5) is connected to the sewage main line (4).

2. The filter according to claim 1, characterized in that, A steam pipeline (7) is provided on one side of the sewage main line (4), a first outlet end of the steam pipeline (7) is connected to the waste oil tank pipeline (6), and a third valve (71) is provided at the first outlet end of the steam pipeline (7).

3. The filter according to claim 2, characterized in that, The steam pipeline (7) is provided with a second outlet end, the second outlet end is communicated with the cleaning pipeline (5), and the second outlet end of the steam pipeline (7) is provided with a fourth valve (72).

4. A filter according to claim 2, characterized in that, The waste oil tank pipeline (6) is provided with a fifth valve (61), and the fifth valve (61) is located on the side of the first outlet end of the steam pipeline (7) away from the sewage main pipeline (4).

5. A filter according to claim 3, characterized in that, The cleaning pipeline (5) is provided with a sixth valve (51), and the sixth valve (51) is located on the side of the second outlet end of the steam pipeline (7) away from the sewage main line (4).

6. A filter according to claim 1, characterized in that, An oil filter tank (8) is arranged below the outlets of the two branch pipes.

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