CN212404027U - Oil slurry filtering device with backflow control system - Google Patents
Oil slurry filtering device with backflow control system Download PDFInfo
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- CN212404027U CN212404027U CN202021184449.5U CN202021184449U CN212404027U CN 212404027 U CN212404027 U CN 212404027U CN 202021184449 U CN202021184449 U CN 202021184449U CN 212404027 U CN212404027 U CN 212404027U
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Abstract
The invention provides an oil slurry filtering device with a backflow control system, which comprises an oil slurry raw material tank, a raw oil slurry pump, a group of parallel oil slurry filters, a filtered oil slurry line or a filtered oil slurry pump, a first backflow pipeline, a second backflow pipeline, a first stop valve and a backflow oil slurry regulating valve group. According to the invention, the main outlet pipeline is connected with the second backflow pipeline which is connected with the backflow oil slurry inlet on the oil slurry raw material tank corresponding to the upper part of the oil slurry liquid level in the oil slurry raw material tank, and the second backflow pipeline is provided with the backflow oil slurry adjusting valve group, so that the processing capacity of the oil slurry filtering device can be stabilized, and the influence of flow change on the outlet pipeline and the valve of the raw material oil slurry pump caused by normal operation of the device is eliminated; the method can stabilize the operation pressure of the system and eliminate the influence of the content fluctuation of the raw material slurry oil catalyst on the long-period stable operation of the slurry oil filtering device.
Description
Technical Field
The invention relates to the field of petroleum refining equipment, in particular to an oil slurry filtering device with a backflow control system.
Background
The bottom oil slurry of the fractionating tower of the catalytic cracking unit for refining and processing petroleum contains high catalyst particles (about 2000 ppm-8000 ppm) and is a heavy oil product containing colloid and asphaltene; the content of catalyst particles in the catalytic slurry oil is reduced to a required range through a slurry oil filtering device, and the filtered catalytic slurry oil can be used as a production raw material for blending heavy fuel oil, needle coke and carbon fiber.
The oil slurry pump is the main equipment of the oil slurry filtering device, comprises a raw oil slurry pump of an oil slurry filtering system and a filtered sump oil pump, and is characterized by high temperature, small flow, high lift, easy flushing and easy blockage because the operation temperature of the catalytic oil slurry filtering system is about 160-350 ℃. According to the setting of the differential pressure of the oil slurry filtering process flow, the conveying of the filtered oil slurry and the process flow setting of the filtered sump oil to a catalytic reactor riser or a coking device, the flow of a raw material oil slurry pump and the flow of a filtered sump oil slurry pump are generally required to be 0.5-20 m3The pump is a typical small-flow high-lift pump with a delivery head of 60-200 m; the process flow and the operation condition of the oil slurry filtering system are combined, and the backflow control system of the oil slurry pump is optimally arranged, so that the key effect on the stable operation of the oil slurry pump and the long-period operation of the oil slurry filtering device can be achieved.
In the general process pump reflux control in petrochemical equipment, a pipeline is led out from the outlet of the pump and refluxed to the inlet of the pump, a stop valve or an adjusting valve is added in the pipeline to adjust the reflux quantity of the pump, because the operating medium temperature of the slurry pump (including the raw slurry pump and the filtered sump pump) of the slurry oil filtering device is high, and the slurry oil pump is a centrifugal pump with small flow and high lift, the efficiency of the general pump is low, a large amount of pump motors can be converted into heat energy when acting to convey slurry oil media, if the return flow reaches more than 20% of the working flow of the slurry pump, the slurry pump can partially vaporize the slurry medium in the pump if the running time of the slurry pump is slightly long, thereby causing the cavitation of the medium in the slurry pump, causing the phenomena of evacuation and aggravation of vibration of the pump body and an output pipeline of the slurry pump, seriously affecting the stable operation of the slurry pump and the service life of mechanical seal of the pump, causing the maintenance of the pump and influencing the stable production of the slurry filter device. In addition, the reason that the raw material slurry pump and the filtered sump oil pump are both provided with conventional return lines (namely, a pipeline is led out from the outlet of the pump and flows back to the inlet of the pump) is that catalyst particles, colloid and asphaltene are contained in a slurry medium, and during shutdown steam purging, if the slurry filtering device purges through the pump body for a long time, the pump body and a flow channel at a pump impeller of the pump are easily blocked, so that unnecessary equipment maintenance of the slurry pump is caused, and therefore, the conventional return line which leads out a pipeline from the outlet of the pump and flows back to the inlet of the pump and is provided with a stop valve in the middle of the pipeline can be convenient for the pump to start, needs the flow adjustment of the slurry pump in a short time and meets the operation requirement; in addition, if the reflux flow of the pump needs to be adjusted in a short period in the initial stage of starting the pump, the reflux line needs to be set in order to be convenient for the principle consideration of operation.
However, the prior art slurry oil filtering device has the following defects:
the single filter of slurry oil filtration system belongs to intermittent operation, filter the pressure differential value increase to certain extent or filtering time when the inside filter core of filter reaches the specified value, just need to amputate this filter from the system and stop the slurry oil feeding, and carry out the backwash to the filter core, throw the feeding again after the washing, the filter stops the feeding and throws the process of feeding again and can arouse the great fluctuation of system slurry oil feeding volume, can arouse even when the filter number sets up when less in the system that the pipeline valve between raw materials slurry oil export to the slurry oil feeding governing valve acutely shakes, seriously influence slurry oil filtration system's normal operating.
Disclosure of Invention
In view of the above, it is necessary to provide a slurry oil filtering apparatus with a backflow control system, which can stabilize the processing throughput of the slurry oil filtering system, eliminate the influence of the flow change caused by the normal operation of the apparatus on the vibration of the outlet pipeline and the valve of the slurry oil pump, stabilize the operation pressure of the system, and eliminate the influence of the catalyst content fluctuation of the slurry oil on the long-term stable operation of the slurry oil filtering system.
The oil slurry filtering device with the backflow control system comprises an oil slurry raw material tank, a raw oil slurry pump, a group of parallel oil slurry filters, a filtered oil slurry line or a filtered oil slurry pump, wherein a raw oil slurry inlet is formed in the upper part of the oil slurry raw material tank, a raw oil slurry outlet is formed in the bottom of the oil slurry raw material tank, the raw oil slurry outlet is communicated with an inlet of the raw oil slurry pump, an outlet of the raw oil slurry pump is communicated with an inlet at the bottom of each oil slurry filter, an outlet at the upper part of each oil slurry filter is communicated with the filtered oil slurry line or the filtered oil slurry pump through a main outlet pipeline, a filtered oil slurry regulating valve group is arranged on the main outlet pipeline close to the end of the filtered oil slurry line or the filtered oil slurry pump, the outlet of the raw oil slurry pump is connected with a first backflow pipeline connected with the inlet of the raw oil slurry pump, and a first stop valve is arranged on the first backflow pipeline, and is characterized in that the oil slurry raw material tank is provided with, the main outlet pipeline is connected with a second backflow pipeline which is connected with a backflow oil slurry inlet, and a backflow oil slurry adjusting valve group is arranged on the second backflow pipeline.
In one embodiment, the filtered oil slurry regulating valve set comprises a first filtered stop valve, a filtered regulating valve, a second filtered stop valve and a third filtered stop valve, wherein the first filtered stop valve, the filtered regulating valve and the second filtered stop valve are sequentially connected in series and then connected in parallel with the third filtered stop valve.
In one embodiment, the backflow slurry adjusting valve set comprises a first backflow stop valve, a backflow adjusting valve, a second backflow stop valve and a third backflow stop valve, wherein the first backflow stop valve, the backflow adjusting valve and the second backflow stop valve are sequentially connected in series and then connected in parallel with the third backflow stop valve.
In one embodiment, a filtering inlet switch valve is arranged at the inlet of the bottom of each slurry filter, and a filtering outlet switch valve is arranged at the outlet of the upper part of each slurry filter.
In one embodiment, a raw oil slurry inlet stop valve is arranged at the raw oil slurry inlet, and a raw oil slurry outlet stop valve is arranged at the raw oil slurry outlet.
In one embodiment, a pump inlet stop valve is arranged at the inlet of the raw oil slurry pump, and a pump outlet stop valve is arranged at the outlet of the raw oil slurry pump.
The invention has the advantages and beneficial effects that:
according to the invention, the main outlet pipeline is connected with the second backflow pipeline which is connected with the backflow oil slurry inlet on the oil slurry raw material tank corresponding to the upper part of the oil slurry liquid level in the oil slurry raw material tank, and the second backflow pipeline is provided with the backflow oil slurry adjusting valve group, so that the processing capacity of the oil slurry filtering device can be stabilized, and the influence of flow change on the outlet pipeline and the valve of the raw material oil slurry pump caused by normal operation of the device is eliminated; the method can stabilize the operation pressure of the system and eliminate the influence of the content fluctuation of the raw material slurry oil catalyst on the long-period stable operation of the slurry oil filtering device. In addition, the filtered oil slurry which flows back to the oil slurry raw material tank through the second backflow pipeline is mixed with the oil slurry before filtration, so that the content of the catalyst in the oil slurry raw material tank can be stabilized, and the influence of large fluctuation of the content of the catalyst in the oil slurry raw material is reduced.
The inlet of the backflow oil slurry is arranged on the upper portion of the oil slurry raw material tank corresponding to the upper portion of the normal operation oil slurry liquid level in the oil slurry raw material tank, and the influence of the oil slurry raw material tank on resistance generated by feeding under liquid on the backflow liquid can be eliminated.
Drawings
Fig. 1 is a schematic structural diagram of this embodiment 1.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
Referring to fig. 1, the slurry oil filtering apparatus with a backflow control system includes a slurry oil stock tank 1, a slurry oil pump 2, a set of slurry oil filters 3 connected in parallel, and a post-filter slurry oil pump 4.
Wherein, the upper portion of slurry oil head tank 1 is equipped with raw materials slurry oil import 11, and the bottom of slurry oil head tank 1 is equipped with raw materials slurry oil export 12.
Specifically, the raw oil slurry outlet 12 is communicated with the inlet of the raw oil slurry pump 2. The outlet of the raw oil slurry pump 2 is communicated with the bottom inlet of each oil slurry filter 3. The upper outlet of each slurry filter 3 is connected to the post-filter slurry pump 4 via a main outlet line 5. The end of the main outlet pipeline 5 close to the filtered oil slurry pump 4 is provided with a filtered oil slurry regulating valve group. The outlet of the raw oil slurry pump 2 is connected with a first flow return line 7 and connected with the inlet of the raw oil slurry pump 2, and the first flow return line 7 is provided with a first stop valve 71.
Specifically, a backflow slurry inlet 13 is arranged on the slurry tank 1 corresponding to the upper portion of the slurry level in the slurry tank 1. The main outlet line 5 is connected with a second return line 8 which is connected with a return slurry inlet 13. A backflow slurry oil regulating valve group is arranged on the second backflow pipeline 8.
Specifically, the filtered oil slurry regulating valve group comprises a first filtered stop valve 61, a filtered regulating valve 62, a second filtered stop valve 63 and a third filtered stop valve 64. The first post-filter stop valve 61, the post-filter regulating valve 62 and the second post-filter stop valve 63 are connected in series in sequence and then connected in parallel with the third post-filter stop valve 64.
Specifically, the backflow slurry oil regulating valve group comprises a first backflow stop valve 91, a backflow regulating valve 92, a second backflow stop valve 93 and a third backflow stop valve 94. The first backflow stop valve 91, the backflow regulating valve 92 and the second backflow stop valve 93 are sequentially connected in series and then connected in parallel with the third backflow stop valve 94.
Wherein, a filtering inlet switch valve 31 is arranged at the bottom inlet of each oil slurry filter 3, and a filtering outlet switch valve 32 is arranged at the upper outlet of each oil slurry filter 3.
Wherein, a raw material oil slurry inlet stop valve 14 is arranged at the raw material oil slurry inlet 1, and a raw material oil slurry outlet stop valve 15 is arranged at the raw material oil slurry outlet 12.
Specifically, the inlet of the raw oil slurry pump 2 is provided with a pump inlet stop valve 21, and the outlet of the raw oil slurry pump 2 is provided with a pump outlet stop valve 22.
Working principle and working process of the invention
Oil slurry flow path: the method comprises the steps of slurry oil raw material tank, raw slurry oil pump, slurry oil filter, filtered slurry oil line or filtered slurry oil pump.
The second backflow pipeline mainly adjusts the backflow amount of the oil slurry filtering device to the oil slurry raw material tank through the backflow oil slurry adjusting valve group, the main purpose is to stabilize the treatment capacity of the oil slurry filtering device, and the oil slurry filtering device is guaranteed not to change the treatment capacity of the oil slurry filtering device due to the fact that the coming amount of raw oil slurry entering the oil slurry raw material tank changes and the flow change of the filtered oil slurry exiting the oil slurry filtering device is required, so that the oil slurry filtering device always keeps running under a stable operation condition, and the stable running of the long-period running, especially the raw oil slurry pump, of the oil slurry filtering device can play a role in determining.
It should be noted that: the invention can select to set the filtered oil slurry line or the filtered oil slurry pump according to the requirement of the subsequent oil slurry processing device.
The invention has the advantages and beneficial effects that:
according to the invention, the main outlet pipeline 5 is connected with the second backflow pipeline 8 and is connected with the backflow slurry inlet 13, corresponding to the upper part of the slurry level in the slurry raw material tank 1, on the slurry raw material tank 1, and the second backflow pipeline 8 is provided with the backflow slurry regulating valve group 9, so that the processing capacity of the slurry filtering device can be stabilized, and the influence of flow change on the outlet pipeline and the valve of the slurry raw material pump caused by normal operation of the device is eliminated; the method can stabilize the operation pressure of the system and eliminate the influence of the content fluctuation of the raw material slurry oil catalyst on the long-period stable operation of the slurry oil filtering device. In addition, the filtered oil slurry which flows back to the oil slurry raw material tank 1 through the second backflow pipeline 8 is mixed with the oil slurry before filtration, so that the content of the catalyst in the oil slurry raw material tank 1 can be stabilized, and the influence of large fluctuation of the content of the catalyst in the oil slurry raw material can be reduced.
The backflow slurry inlet 13 is arranged on the upper portion of the slurry tank 1 corresponding to the level of the normally-operated slurry in the slurry tank 1, and can eliminate the influence of the slurry tank 1 on the resistance of backflow liquid due to the fact that feeding is carried out under liquid.
The above-mentioned embodiments only express one embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The oil slurry filtering device with the backflow control system is characterized by comprising an oil slurry raw material tank, a raw oil slurry pump, a group of parallel oil slurry filters, a filtered oil slurry line or a filtered oil slurry pump, wherein a raw oil slurry inlet is formed in the upper part of the oil slurry raw material tank, a raw oil slurry outlet is formed in the bottom of the oil slurry raw material tank and communicated with an inlet of the raw oil slurry pump, an outlet of the raw oil slurry pump is communicated with an inlet at the bottom of each oil slurry filter, an outlet at the upper part of each oil slurry filter is communicated with the filtered oil slurry line or the filtered oil slurry pump through a main outlet pipeline, a filtered oil slurry adjusting valve group is arranged at the end, close to the filtered oil slurry line or the filtered oil slurry pump, of the main outlet pipeline, the outlet of the raw oil slurry pump is connected with the inlet of the raw oil slurry pump through a first backflow pipeline, a first stop valve is arranged on the first backflow oil pipeline, a backflow oil slurry inlet is arranged on the oil slurry raw material tank corresponding to, the main outlet pipeline is connected with a second backflow pipeline which is connected with a backflow oil slurry inlet, and a backflow oil slurry adjusting valve group is arranged on the second backflow pipeline.
2. The slurry filter apparatus with a backflow control system of claim 1, wherein the filtered slurry regulating valve set comprises a first filtered stop valve, a filtered regulating valve, a second filtered stop valve, and a third filtered stop valve, and the first filtered stop valve, the filtered regulating valve, and the second filtered stop valve are connected in series in sequence and then connected in parallel with the third filtered stop valve.
3. The slurry filtering device with the backflow control system according to claim 1, wherein the backflow slurry regulating valve set comprises a first backflow stop valve, a backflow regulating valve, a second backflow stop valve and a third backflow stop valve, and the first backflow stop valve, the backflow regulating valve and the second backflow stop valve are sequentially connected in series and then connected in parallel with the third backflow stop valve.
4. The slurry filtering device with the backflow control system according to claim 1, wherein a filtering inlet switch valve is arranged at a bottom inlet of each slurry filter, and a filtering outlet switch valve is arranged at an upper outlet of each slurry filter.
5. The slurry filtering device with the backflow control system according to claim 1, wherein a raw slurry inlet stop valve is arranged at the raw slurry inlet, and a raw slurry outlet stop valve is arranged at the raw slurry outlet.
6. The slurry filter apparatus with a backflow control system according to claim 1, wherein a pump inlet stop valve is provided at an inlet of the raw slurry pump, and a pump outlet stop valve is provided at an outlet of the raw slurry pump.
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| CN202021184449.5U CN212404027U (en) | 2020-06-24 | 2020-06-24 | Oil slurry filtering device with backflow control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115910410A (en) * | 2023-01-04 | 2023-04-04 | 中国原子能科学研究院 | Method for treating radioactive waste liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115910410A (en) * | 2023-01-04 | 2023-04-04 | 中国原子能科学研究院 | Method for treating radioactive waste liquid |
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