Mixed hydrocarbon fine separation device

Abstract

The utility model discloses a mixed hydrocarbon fine separation device, which belongs to the technical field of mixed hydrocarbon separation, and comprises a filter component, a filter element and a control component, the gas-liquid separation assembly is connected with the output end of the filtering assembly; the filtering assembly comprises a coarse filtering assembly and a fine filtering assembly; the output end of the coarse filtering assembly is connected with the input end of the fine filtering assembly, and the output end of the fine filtering assembly is connected with the input end of the gas-liquid separation assembly; the coarse filter is used for filtering large-volume foreign matters in the mixed hydrocarbon, the fine filter assembly is used for filtering silt in the mixed hydrocarbon, the large-volume foreign matters in the mixed hydrocarbon are filtered through the coarse filter assembly, and the filtered mixed hydrocarbon is filtered again in two fine dehydrators arranged in front of an original rectifying tower; the mixed hydrocarbon is subjected to water enrichment and removal in the fine dehydrator, and silt in the mixed hydrocarbon is removed at the same time, so that the problem of regular shutdown of the device caused by accumulation of the silt on the tower plate is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mixed hydrocarbon separation, specifically to a mixed hydrocarbon separation device. BACKGROUND

[0002] Mixed hydrocarbon separation devices have wide applications in the petroleum industry, chemical industry, and other fields. In the petroleum industry, they are used for the separation and purification of crude oil to obtain liquefied petroleum gas, gasoline, diesel fuel, and other chemical products. In the chemical industry, they are used for the separation and purification of organic substances to produce various chemical raw materials and intermediates.

[0003] Mixed hydrocarbon separation devices separate and purify different components in mixed hydrocarbons through specific processes and principles to obtain single hydrocarbon products with high purity.

[0004] Currently, mixed hydrocarbon separation devices have a high water content and high mud content in mixed hydrocarbons, which can cause the float valve of the rectification tower plate to be blocked after a long period of operation, resulting in a short operation cycle of the device. SUMMARY

[0005] To solve the problems of the prior art, the utility model provides a mixed hydrocarbon separation device, which comprises: a filter assembly for filtering foreign matter in mixed hydrocarbons;

[0006] A gas-liquid separation assembly is connected to the output end of the filter assembly.

[0007] The filter assembly comprises a coarse filter assembly and a fine filter assembly.

[0008] The output end of the coarse filter assembly is connected to the input end of the fine filter assembly, and the output end of the fine filter assembly is connected to the input end of the gas-liquid separation assembly.

[0009] The coarse filter is used to filter large-volume foreign matter in mixed hydrocarbons, and the fine filter assembly is used to filter mud and sand in the mixed hydrocarbons.

[0010] Further, the coarse filter assembly comprises a first shunt pipe, a second shunt pipe, and a third shunt pipe.

[0011] One end of the first shunt pipe is connected to a mixed hydrocarbon conveying pipe, the other end of the first shunt pipe is connected to one end of the second shunt pipe, the other end of the second shunt pipe is connected to one end of the third shunt pipe, and the other end of the third shunt pipe is connected to the input end of the fine filter assembly.

[0012] A shunt plate is arranged in each of the second shunt pipe and the third shunt pipe, the shunt plate divides the corresponding shunt pipe into multiple shunt channels, the second shunt pipe includes two shunt channels, and the number of shunt channels in the third shunt pipe is twice that in the second shunt pipe.

[0013] The first shunt pipe, the second shunt pipe and the third shunt pipe are provided with filter units.

[0014] Further, one filter unit is arranged in the first shunt pipe, two filter units are arranged in the second shunt pipe and are respectively arranged in two shunt channels, and four filter units are arranged in the third shunt pipe and are respectively arranged in four shunt channels.

[0015] Further, the filter unit comprises a filter plate, a flow-converging plate and a filter cavity.

[0016] The flow-converging plate is in a cavity structure with two open ends, and the cross section of the flow-converging plate is in isosceles trapezoidal shape.

[0017] One end of the filter cavity is connected with one end of the flow-converging plate, a plurality of filter balls are arranged in the filter cavity, the filter balls are in hollow structure and a plurality of through holes are arranged on the surface of the filter balls.

[0018] The flow-converging plate and the filter plate are arranged in the shunt channel, the flow-converging plate is arranged close to one end of the shunt pipe, and the filter plate is arranged close to the other end of the shunt pipe.

[0019] The filter cavity is arranged between the flow-converging plate and the filter plate.

[0020] Further, the fine filtering assembly comprises two fine water separators, the input ends of the fine water separators are connected with the third shunt pipe, and the output ends of the fine water separators are connected with the gas-liquid separation assembly.

[0021] Further, the gas-liquid separation assembly comprises a reboiler, a rectifying tower, a condenser and a reflux tank.

[0022] The output ends of the fine water separators are connected with the rectifying tower.

[0023] The top of the rectifying tower is connected with the input end of the condenser, the output end of the condenser is connected with the reflux tank, and the reflux tank is connected with the rectifying tower.

[0024] The two ends of the reboiler are respectively connected with the side wall and the bottom of the rectifying tower.

[0025] The beneficial effects of the utility model are as follows:

[0026] The coarse filtering assembly is arranged to filter large-volume foreign matters in mixed hydrocarbon, the filtered mixed hydrocarbon is filtered again in two fine water separators arranged in front of the original rectifying tower, water in the mixed hydrocarbon is enriched and removed in the fine water separators, and the mixed hydrocarbon is also removed from the mixed hydrocarbon, so that the problem that the device is regularly stopped due to the accumulation of sand on the tower plate is solved, and the mixed hydrocarbon enters the rectifying tower after passing through the fine water separators. Attached Figure Description

[0027] Fig. 1 A schematic diagram of the overall structure of the mixed hydrocarbon separation device provided by this utility model;

[0028] Fig. 2 A schematic diagram of the front structure of the coarse filter provided by this utility model;

[0029] Fig. 3 This is a schematic diagram of the exploded structure of the coarse filter provided by this utility model.

[0030] Figure label:

[0031] In the diagram: 1 is the first branch pipe, 2 is the second branch pipe, 3 is the third branch pipe, 4 is the flow divider plate, 5 is the filter plate, 6 is the flow converger plate, 7 is the filter chamber, 8 is the dehydrator, 9 is the reboiler, and 10 is the distillation column. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figs. 1-3 This utility model provides a mixed hydrocarbon fine separation device, including: a filter assembly for filtering foreign matter in mixed hydrocarbons;

[0034] A gas-liquid separation component, wherein the gas-liquid separation component is connected to the output end of the filter component;

[0035] The filtration assembly includes: a coarse filtration assembly and a fine filtration assembly;

[0036] The output end of the coarse filtration component is connected to the input end of the fine filtration component, and the output end of the fine filtration component is connected to the input end of the gas-liquid separation component.

[0037] The coarse filter is used to filter large foreign objects in the mixed hydrocarbons, and the fine filter assembly is used to filter mud and sand in the mixed hydrocarbons.

[0038] It should be noted that the main inventive point of this application is that by setting up a coarse filtration component to filter large foreign objects in the mixed hydrocarbons first, the mixed hydrocarbons then enter the fine filtration component to filter out silt and sand, thereby improving the purity of the mixed hydrocarbons and solving the problem of silt and sand accumulating on the trays and causing the unit to shut down periodically.

[0039] In some embodiments, the coarse filtering assembly comprises a first shunt pipe 1, a second shunt pipe 2 and a third shunt pipe 3;

[0040] One end of the first shunt pipe 1 is connected with the mixed hydrocarbon conveying pipe, the other end of the first shunt pipe 1 is connected with one end of the second shunt pipe 2, the other end of the second shunt pipe 2 is connected with one end of the third shunt pipe 3, and the other end of the third shunt pipe 3 is connected with the input end of the fine filtering assembly;

[0041] A shunt plate 4 is arranged in each of the second shunt pipe 2 and the third shunt pipe 3, the shunt plate 4 divides the corresponding shunt pipe into a plurality of shunt channels, the second shunt pipe 2 comprises two shunt channels, and the number of shunt channels in the third shunt pipe 3 is twice that of the second shunt pipe 2;

[0042] A filtering unit is arranged in each of the first shunt pipe 1, the second shunt pipe 2 and the third shunt pipe 3.

[0043] One filtering unit is arranged in the first shunt pipe 1, two filtering units are arranged in the second shunt pipe 2 and located in the two shunt channels respectively, and four filtering units are arranged in the third shunt pipe 3 and located in the four shunt channels respectively.

[0044] The filtering unit comprises a filtering plate 5, a flow converging plate 6 and a filtering cavity 7.

[0045] The flow converging plate 6 has a cavity structure with two open ends, and the cross section of the flow converging plate 6 is isosceles trapezoidal.

[0046] One end of the filtering cavity 7 is connected with one end of the flow converging plate 6, a plurality of filtering balls are arranged in the filtering cavity 7, the filtering balls have a hollow structure, and a plurality of through holes are formed in the surface of the filtering balls.

[0047] The flow converging plate 6 and the filtering plate 5 are arranged in the shunt channel, one end of the flow converging plate 6 is arranged close to one end of the shunt pipe, and the other end of the filtering plate 5 is arranged close to the other end of the shunt pipe.

[0048] The filtering cavity 7 is located between the flow converging plate 6 and the filtering plate 5.

[0049] The diameters of the filtering holes on the filtering plates in the first shunt pipe, the second shunt pipe and the third shunt pipe decrease in turn, and when the mixed hydrocarbon passes through the first shunt pipe, the second shunt pipe and the third shunt pipe, the first fluid is gradually divided into two fluids and then into four fluids, so that the filtering effect can be improved. Since the filtering cavity is arranged in each shunt pipe and the filtering balls are arranged in the filtering cavity, the large-volume foreign matters in the mixed hydrocarbon can be effectively filtered.

[0050] In some embodiments, the polishing filter assembly comprises two polishing water traps 8, the input ends of which are connected with the third shunt pipe 3, and the output ends of which are connected with the gas-liquid separation assembly.

[0051] In some embodiments, the gas-liquid separation assembly comprises a reboiler 9, a rectifying tower 10, a condenser 11 and a reflux tank 12.

[0052] The output ends of the polishing water traps 8 are connected with the rectifying tower 10.

[0053] The top of the rectifying tower 10 is connected with the input end of the condenser 11, the output end of the condenser 11 is connected with the reflux tank, and the reflux tank 12 is connected with the rectifying tower 10.

[0054] The two ends of the reboiler 9 are connected with the sidewall and the bottom of the rectifying tower 10, respectively.

[0055] In the original deethanizer, two polishing water traps are added (switched for use in normal production), and the mixed hydrocarbon is enriched and removed in the polishing water trap. Since the density of water is greater than that of mixed hydrocarbon, water will be enriched at the bottom of the polishing water trap, and the mud and sand in the mixed hydrocarbon will be removed, thereby solving the problem of periodic shutdown of the device caused by the accumulation of mud and sand on the tray.

[0056] After the mixed hydrocarbon enters the rectifying tower, the mixed hydrocarbon undergoes the process of heat transfer and mass transfer on the tray under the action of the heat source of the reboiler, and the vapor at the top of the tower enters the overhead condenser for condensation.

[0057] By adjusting the residence time of the mixed hydrocarbon in the water trap, it is ensured that water and mud and sand are completely removed, and water online analysis is performed at the inlet and outlet of the water trap. When the water content at the outlet of the water trap increases to the same as that at the inlet, it indicates that the internal parts of the polishing water trap are blocked, and it is necessary to switch to another polishing water trap in time.

[0058] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A mixed hydrocarbon purification and separation device, characterized in that, include: Filter assembly for filtering foreign matter from mixed hydrocarbons; A gas-liquid separation component, wherein the gas-liquid separation component is connected to the output end of the filter component; The filtration assembly includes: a coarse filtration assembly and a fine filtration assembly; The output end of the coarse filtration component is connected to the input end of the fine filtration component, and the output end of the fine filtration component is connected to the input end of the gas-liquid separation component. The coarse filter assembly is used to filter large foreign objects in the mixed hydrocarbons, and the fine filter assembly is used to filter mud and sand in the mixed hydrocarbons.

2. The mixed hydrocarbon purification and separation device according to claim 1, characterized in that, The coarse filtration assembly includes: a first branch pipe, a second branch pipe, and a third branch pipe; One end of the first split pipe is connected to the mixed hydrocarbon conveying pipe, the other end of the first split pipe is connected to one end of the second split pipe, the other end of the second split pipe is connected to one end of the third split pipe, and the other end of the third split pipe is connected to the input end of the fine filtration component. Both the second and third diversion pipes are equipped with diversion plates, which divide the interior of the corresponding diversion pipe into multiple diversion channels. The second diversion pipe includes two diversion channels, and the number of diversion channels in the third diversion pipe is twice that in the second diversion channel. A filter unit is provided in the first, second, and third diversion pipes.

3. The mixed hydrocarbon refining and separation device according to claim 2, characterized in that, One filter unit is provided in the first diversion pipe, two diversion units are provided in the second diversion pipe and are respectively located in two diversion channels, and four filter units are provided in the third diversion pipe and are respectively located in four diversion channels.

4. The mixed hydrocarbon purification and separation device according to claim 3, characterized in that, The filtration unit includes: a filter plate, a flow-concentrating plate, and a filter chamber; The flow-gathering plate has a cavity structure with openings at both ends, and the cross-section of the flow-gathering plate is an isosceles trapezoidal shape; One end of the filter chamber is connected to one end of the flow-concentrating plate. The filter chamber contains a plurality of filter balls, which are hollow and have several through holes on their surface. Both the flow-gathering plate and the filter plate are disposed inside the flow-dividing channel, with the flow-gathering plate disposed at one end near the flow-dividing pipe and the filter plate disposed at the other end near the flow-dividing pipe; The filter chamber is located between the flow-concentrating plate and the filter plate.

5. The mixed hydrocarbon purification and separation device according to claim 2, characterized in that, The fine filtration assembly includes two fine dehydrators, the input ends of which are connected to the third diverter pipe, and the output ends of which are connected to the gas-liquid separation assembly.

6. The mixed hydrocarbon refining and separation device according to claim 5, characterized in that, The gas-liquid separation assembly includes: a reboiler, a distillation column, a condenser, and a reflux tank; The output of each of the dehydrators is connected to a distillation column. The top of the distillation column is connected to the input end of the condenser, the output end of the condenser is connected to the reflux tank, and the reflux tank is connected to the distillation column; The two ends of the reboiler are connected to the side wall and bottom of the distillation column, respectively.

Images