阅读说明：本技术 一种油系针状焦生产用循环油暂存系统 (Circulating oil temporary storage system for oil-based needle coke production ) 是由 牛永峰 李新 徐宝田 程亮 时泰雍 田振宝 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种油系针状焦生产用循环油暂存系统,包括换热冷凝塔,所述换热冷凝塔的蜡油出口端设置有循环油暂存机构,所述换热冷凝塔下部设置有原料油收集箱,所述原料油收集箱一侧设置有联合油混合仓,本发明利用定速给料机构对原料油以及循环油的供给量进行调节,从而实现对焦化作业循环比的有效控制,使得回供给加热炉的联合油中,原料油与循环油的比值保持相对稳定,进一步降低焦化作业过程中进入到焦化塔内的原料油的温度变化梯度,同时在联合油混合仓的出口端一侧设置有分离过滤机构,利用分离过滤机构对联合油液中混杂的焦粉颗粒以及催化剂粉末进行分离,从而提高焦化作业稳定性,提高针状焦结焦品质。(The invention discloses a circulating oil temporary storage system for oil-based needle coke production, which comprises a heat exchange condensing tower, wherein a circulating oil temporary storage mechanism is arranged at a wax oil outlet end of the heat exchange condensing tower, a raw oil collecting box is arranged at the lower part of the heat exchange condensing tower, and a combined oil mixing bin is arranged at one side of the raw oil collecting box. Thereby improving the stability of the coking operation and the coking quality of the needle coke.)

1. A circulating oil temporary storage system for oil-series needle coke production comprises a heat exchange condensation tower (1) and is characterized in that a circulating oil temporary storage mechanism is arranged at a wax oil outlet end of the heat exchange condensation tower (1), a raw oil collecting box (2) is arranged at the lower part of the heat exchange condensation tower (1), a combined oil mixing bin (3) is arranged on one side of the raw oil collecting box (2), constant-speed feeding mechanisms are arranged between the circulating oil temporary storage mechanism and the raw oil collecting box (2) and the combined oil mixing bin (3), and a separation filtering mechanism is arranged at an outlet end of the combined oil mixing bin (3);

circulating oil temporary storage mechanism includes: wax oil buffer tank (4), accuse temperature regulating assembly, oil extraction pump (5), liquid level monitoring subassembly and relief valve (6), wax oil buffer tank (4) set up in heat transfer condensing tower (1) one side, accuse temperature regulating assembly suit sets up in the wax oil buffer tank (4) outside, the entrance point of oil extraction pump (5) is linked together with the wax oil exit end of heat transfer condensing tower (1), the exit end of oil extraction pump (5) is linked together with the upper end of wax oil buffer tank (4), the liquid level monitoring subassembly sets up in wax oil buffer tank (4) and one end stretches out wax oil buffer tank (4) outside, relief valve (6) set up on wax oil buffer tank (4).

2. The system for temporarily storing the circulating oil for producing the oil-based needle coke according to claim 1, wherein the temperature control and adjustment assembly comprises: heat preservation housing (7), heating pipe (8), heat conduction inside lining (9) and temperature sensor (10), heat preservation housing (7) spiral-lock is in the wax oil buffer tank (4) outside, heating pipe (8) set up in heat preservation housing (7), heat conduction inside lining (9) subsides are adorned on wax oil buffer tank (4) outside wall and are pasted mutually with heating pipe (8), temperature sensor (10) subsides are adorned on wax oil buffer tank (4) inside wall face.

3. The system for temporarily storing the circulating oil for producing the oil-based needle coke as claimed in claim 1, wherein the liquid level monitoring assembly comprises: level sensor (11) and reposition of redundant personnel drain component, level sensor (11) set up in wax oil buffer tank (4), reposition of redundant personnel drain component sets up in wax oil buffer tank (4) one side and is linked together with wax oil buffer tank (4).

4. The temporary storage system for the circulating oil for producing the oil-based needle coke according to claim 3, wherein the flow dividing and guiding member comprises: honeycomb duct (12), flowing back tar pump (13), circulation buffer tank (29) and circulation tar pump (14), the one end of honeycomb duct (12) is inserted in wax oil buffer tank (4), the feed liquor end of flowing back tar pump (13) is linked together with honeycomb duct (12), circulation buffer tank (29) communicates with the play liquid end of flowing back tar pump (13), the feed liquor end of circulation tar pump (14) is linked together with circulation buffer tank (29), the flowing back end is linked together with wax oil buffer tank (4).

5. The system for temporarily storing the circulating oil for producing the oil-based needle coke according to claim 1, wherein the constant-speed feeding mechanism comprises: the wax oil mixing device comprises an oil guide pipe (15), a feeding pump (16) and a flowmeter (17), wherein one end of the oil guide pipe (15) is communicated with a wax oil buffer tank (4), the inlet end of the feeding pump (16) is communicated with the oil guide pipe (15), the other end of the feeding pump is communicated with a combined oil mixing bin (3), and the flowmeter (17) is sleeved on the oil guide pipe (15) and located on one side of the feeding pump (16).

6. The system for temporarily storing the circulating oil for producing the oil-based needle coke as claimed in claim 1, wherein the separation and filtration mechanism comprises: lead oil pump (18), filter storehouse (19), filtration separator assembly, middle buffer tank (20) and pressure boost tar pump (21), the feed liquor end of leading oil pump (18) is linked together with joint oil blending bin (3), filter storehouse (19) and set up on the play liquid end with leading oil pump (18), filtration separator assembly sets up in filtering storehouse (19), middle buffer tank (20) set up on the exit end of filtering storehouse (19), the feed liquor end and middle buffer tank (20) of pressure boost tar pump (21) are linked together, the flowing back end and the coking tower oil supply pipeline of pressure boost tar pump (21) are linked together.

7. The system for temporarily storing the circulating oil for producing the oil-based needle coke as claimed in claim 6, wherein the filtering and separating assembly comprises: spacing seat (22), annular frame (23), grid filter screen (24), adsorb filter screen (25) and assembly connecting component, spacing seat (22) set up in filtering storehouse (19), annular frame (23) cartridge is in filtering storehouse (19) and one end pastes with spacing seat (22) mutually, grid filter screen (24) are fixed to be inlayed and are served in annular frame (23), adsorb filter screen (25) and set up on the other end of annular frame (23), the assembly connecting component sets up and is served and be connected with annular frame (23) in filtering storehouse (19).

8. The system for temporarily storing circulating oil for the production of oil-based needle coke according to claim 7, wherein the fitting connection member comprises: mount pad (26), thrust collar (27) and rubber seal (28), mount pad (26) set firmly in filtering storehouse (19) and lie in annular frame (23) one side, seted up the ladder groove on mount pad (26), annular frame (23) run through mount pad (26) and one end and the tank bottom terminal surface in ladder groove pastes mutually, set up the thread groove on the ladder inslot annular surface, set up screw thread on the outer anchor ring of thrust collar (27), thrust collar (27) spiral set up in the ladder groove, rubber seal (28) set up on thrust collar (27) terminal surface and paste mutually with annular frame (23).

9. The circulating oil temporary storage system for oil-based needle coke production according to claim 8, wherein the annular frame (23) is a stainless steel tubular structure, one end of the annular frame (23) is provided with a step boss, the step boss is matched with the limiting seat (22), the other end of the annular frame (23) is provided with an annular seat, and the annular seat is matched with a step groove in the mounting seat (26).

10. The system for temporarily storing the circulating oil for producing the oil-based needle coke as claimed in claim 1, wherein the filtering and separating mechanism can be arranged in parallel by adopting two channels.

Technical Field

The invention relates to the technical field of oil-based needle coke production, in particular to a circulating oil temporary storage system for oil-based needle coke production.

Background

Delayed coking is used as one of heavy oil processing means, the device mainly comprises a heating furnace, a coking tower, a fractionating tower and the like, raw materials are heated by the heating furnace and then enter the coking tower, a thermal decomposition condensation reaction is generated in the coking tower, pyrolysis gas from the coking tower enters the fractionating tower, and different liquids are separated.

In the process of preparing needle coke, a mild and stable environment needs to be provided for the formation of a wide-area intermediate phase, excessive disturbance of a reaction system is avoided, the heat gradient distribution in the process of converting raw material oil from a liquid state to a solid state in the coking process is required to be as small as possible, in the actual production process, the raw material clarified oil enters an evaporation section of a heat exchange condensation tower from a clarified oil buffer tank through a convection chamber of a heating furnace through a raw material pump, oil gas overflowing from the top of a coke tower enters the evaporation section of the heat exchange condensation tower, the clarified oil exchanges heat with oil gas from the coke tower in the heat exchange condensation tower, the generated oil gas is separated to obtain gas, gasoline fraction, diesel fraction and wax oil fraction, wherein the wax oil fraction is used as circulating oil and mixed with the raw material oil in a certain circulation ratio and then enters the coking tower, needle coke and oil gas are generated by reaction in the coke tower, the needle coke is accumulated in the coke tower, oil and gas spill over the top of the coke drum.

The supply quantity and the supply stability of the circulating oil have important significance for the temperature regulation of the raw oil, and in the fractionation process of oil gas in a heat exchange condensing tower, part of coke powder particles which are difficult to coke and catalyst powder in the pretreatment process of raw material clarified oil can remain in the wax oil fraction, so that a certain influence is caused on the whole circulating oil supply path, and the coking quality of needle coke is influenced.

Disclosure of Invention

The invention aims to solve the problems, designs a circulating oil temporary storage system for oil-based needle coke production, and solves the problems in the background art.

The technical scheme of the invention for realizing the aim is as follows: a circulating oil temporary storage system for oil-series needle coke production comprises a heat exchange condensing tower, wherein a circulating oil temporary storage mechanism is arranged at a wax oil outlet end of the heat exchange condensing tower, a raw oil collecting box is arranged at the lower part of the heat exchange condensing tower, a combined oil mixing bin is arranged on one side of the raw oil collecting box, constant-speed feeding mechanisms are arranged among the circulating oil temporary storage mechanism, the raw oil collecting box and the combined oil mixing bin, and a separation filtering mechanism is arranged at the outlet end of the combined oil mixing bin;

circulating oil temporary storage mechanism includes: wax oil buffer tank, accuse temperature regulating assembly, oil extraction pump, liquid level monitoring subassembly and relief valve, the wax oil buffer tank sets up in heat transfer condensing tower one side, accuse temperature regulating assembly suit sets up in the wax oil buffer tank outside, the entrance point of oil extraction pump is linked together with the wax oil exit end of heat transfer condensing tower, the exit end of oil extraction pump is linked together with the upper end of wax oil buffer tank, the liquid level monitoring subassembly sets up in the wax oil buffer tank and one end stretches out the wax oil buffer tank outside, the relief valve sets up on the wax oil buffer tank.

The temperature control adjusting assembly comprises: the wax oil buffer tank comprises a heat insulation cover shell, a heating pipe, a heat conduction lining and a temperature sensor, wherein the heat insulation cover shell is buckled on the outer side of the wax oil buffer tank, the heating pipe is arranged in the heat insulation cover shell, the heat conduction lining is attached to the outer side wall surface of the wax oil buffer tank and attached to the heating pipe, and the temperature sensor is attached to the inner side wall surface of the wax oil buffer tank.

The liquid level monitoring assembly comprises: level sensor and reposition of redundant personnel drain component, level sensor sets up in the wax oil buffer tank, reposition of redundant personnel drain component sets up in wax oil buffer tank one side and is linked together with the wax oil buffer tank.

The reposition of redundant personnel drainage component includes: honeycomb duct, flowing back tar pump, circulation buffer tank and circulation tar pump, the one end of honeycomb duct is inserted in the wax oil buffer tank, the feed liquor end of flowing back tar pump is linked together with the honeycomb duct, the liquid outlet end of circulation buffer tank and flowing back tar pump communicates mutually, the feed liquor end of circulation tar pump is linked together, the flowing back end is linked together with the wax oil buffer tank with the circulation buffer tank.

The constant-speed feeding mechanism comprises: the wax oil feeding device comprises an oil guide pipe, a feeding pump and a flowmeter, wherein one end of the oil guide pipe is communicated with a wax oil buffer tank, the inlet end of the feeding pump is communicated with the oil guide pipe, the other end of the feeding pump is communicated with a combined oil mixing bin, and the flowmeter is sleeved on the oil guide pipe and located on one side of the feeding pump.

The separation and filtration mechanism includes: lead the oil pump, filter the storehouse, filter separation subassembly, middle buffer tank and pressure boost tar pump, the feed liquor end of leading the oil pump is linked together with joint oil blending storehouse, filter the storehouse setting and serve with the play liquid of leading the oil pump, filter separation subassembly sets up in filtering the storehouse, middle buffer tank sets up on filtering the exit end in storehouse, the feed liquor end of pressure boost tar pump is linked together with middle buffer tank, the flowing back end and the coking tower oil supply pipeline of pressure boost tar pump are linked together.

The filtering and separating assembly comprises: spacing seat, annular frame, grid filter screen, absorption filter screen and assembly connection component, spacing seat sets up in filtering the storehouse, annular frame cartridge is pasted mutually in filtering the storehouse and one end and spacing seat, grid filter screen is fixed to be inlayed and is adorned in annular frame one and serve, absorption filter screen sets up on the other end of annular frame, the assembly connection component sets up and is served and be connected with the annular frame in filtering the storehouse one.

The fitting connection member includes: the installation seat is fixedly arranged in the filtering bin and located on one side of the annular frame, the stepped groove is formed in the installation seat, the annular frame penetrates through the installation seat, one end of the annular frame is attached to the end face of the bottom of the stepped groove, the inner annular face of the stepped groove is provided with the thread groove, the outer annular face of the thrust ring is provided with threads, the thrust ring is spirally arranged in the stepped groove, and the rubber sealing ring is arranged on the end face of the thrust ring and attached to the annular frame.

The annular frame is stainless steel tubular structure, the one end of annular frame is equipped with the ladder boss, ladder boss and spacing seat phase-match, the other end of annular frame is provided with annular seat, the ladder groove phase-match in annular seat and the mount pad.

The filtering and separating mechanism can adopt a two-channel parallel arrangement.

The circulating oil temporary storage system for producing the oil-series needle coke, which is manufactured by the technical scheme of the invention, is characterized in that a circulating oil temporary storage mechanism is arranged on one side of a wax oil outlet end of a heat exchange condensing tower, a raw oil collecting box is arranged on the lower part of the heat exchange condensing tower, a combined oil mixing bin is arranged on one side of the raw oil collecting box, the circulating oil temporary storage mechanism and the raw oil collecting box are respectively communicated with the combined oil mixing bin through a constant-speed feeding mechanism, the circulating oil temporary storage mechanism can be used for controlling the temperature of oil in a wax oil buffer tank and adjusting the quantity of the wax oil, so that the supply quantity of the circulating oil is kept stable in the subsequent operation process, the constant-speed feeding mechanism is used for adjusting the supply quantities of the raw oil and the circulating oil, the effective control of the cycle ratio of coking operation is realized, the ratio of the raw oil to the circulating oil is kept relatively stable in the combined oil which is fed back to a heating furnace, the temperature change gradient of the raw oil entering the coking tower in the coking operation process is further reduced, a separation filtering mechanism is arranged on one side of the outlet end of the combined oil mixing bin, coke powder particles and catalyst powder mixed in the combined oil are separated by the separation filtering mechanism, the coking operation stability is improved, the needle coke coking quality is improved, and the problems that in the prior art, the supply amount of circulating oil cannot be effectively controlled, the supply stability is poor, and part of coke powder particles which are difficult to coke and catalyst powder in the raw material clarified oil pretreatment process can be remained in wax oil fractions, a certain influence is caused on the whole circulating oil supply path, and the needle coke coking quality is influenced are solved.

Drawings

FIG. 1 is a schematic structural diagram of a temporary storage system of circulating oil for producing oil-based needle coke according to the present invention.

Fig. 2 is a schematic top view of a circulating oil temporary storage system for oil-based needle coke production according to the present invention.

Fig. 3 is a schematic perspective view of a circulating oil temporary storage system for oil-based needle coke production according to the present invention.

Fig. 4 is a schematic axial structure diagram of a circulating oil temporary storage system for oil-based needle coke production according to the present invention.

Fig. 5 is a schematic sectional view of a wax oil buffer tank of the circulating oil temporary storage system for producing oil-based needle coke according to the present invention.

Fig. 6 is a schematic sectional view of a filter bin of the circulating oil temporary storage system for producing oil-based needle coke according to the present invention.

Fig. 7 is a schematic diagram of a partially enlarged structure of a position a of a circulating oil temporary storage system for oil-based needle coke production according to the present invention.

Fig. 8 is a schematic diagram of a partial enlarged structure of a position b of the circulating oil temporary storage system for producing oil-based needle coke according to the present invention.

In the figure: 1. a heat exchange condensing tower; 2. a raw oil collecting box; 3. a combined oil mixing bin; 4. a wax oil buffer tank; 5. an oil discharge pump; 6. a pressure relief valve; 7. a heat-preserving housing; 8. heating a tube; 9. a thermally conductive liner; 10. a temperature sensor; 11. a liquid level sensor; 12. a flow guide pipe; 13. a liquid discharge tar pump; 14. a circulating tar pump; 15. an oil guide pipe; 16. a feed pump; 17. a flow meter; 18. an oil guide pump; 19. a filtering bin; 20. a middle buffer tank; 21. a pressurized tar pump; 22. a limiting seat; 23. an annular frame; 24. a grid filter screen; 25. adsorbing a filter screen; 26. a mounting seat; 27. a thrust ring; 28. a rubber seal ring; 29. and circulating the buffer tank.

Detailed Description

The present invention is described in detail below with reference to the accompanying drawings, as shown in fig. 1 to 8, all electrical components in the present application are connected to their adapted power supplies through wires, and an appropriate controller should be selected according to actual situations to meet control requirements, and specific connection and control sequence should be implemented by referring to the following working principle, in which the electrical connection between the electrical components is implemented in sequence, and the detailed connection means is a known technology in the art, and the following description mainly describes the working principle and process, and does not describe the electrical control.

Example (b): as can be seen from the attached figures 1-8 of the specification, the scheme comprises a heat exchange condensing tower 1, a circulating oil temporary storage mechanism is arranged at the wax oil outlet end of the heat exchange condensing tower 1, a raw oil collecting box 2 is arranged at the lower part of the heat exchange condensing tower 1, a combined oil mixing bin 3 is arranged at one side of the raw oil collecting box 2, constant-speed feeding mechanisms are arranged among the circulating oil temporary storage mechanism, the raw oil collecting box 2 and the combined oil mixing bin 3, and a separation filtering mechanism is arranged at the outlet end of the combined oil mixing bin 3; above-mentioned circulating oil temporary storage mechanism includes: the wax oil recovery device comprises a wax oil buffer tank 4, a temperature control adjusting component, an oil discharge pump 5, a liquid level monitoring component and a pressure release valve 6, wherein the wax oil buffer tank 4 is arranged on one side of a heat exchange condensing tower 1, the temperature control adjusting component is sleeved outside the wax oil buffer tank 4, the inlet end of the oil discharge pump 5 is communicated with the wax oil outlet end of the heat exchange condensing tower 1, the outlet end of the oil discharge pump 5 is communicated with the upper end of the wax oil buffer tank 4, the liquid level monitoring component is arranged in the wax oil buffer tank 4, one end of the liquid level monitoring component extends out of the wax oil buffer tank 4, the pressure release valve 6 is arranged on the wax oil buffer tank 4, a circulating oil temporary storage mechanism is arranged on one side of the wax oil outlet end of the heat exchange condensing tower 1, a raw oil collecting box 2 is arranged on the lower portion of the heat exchange condensing tower 1, a combined oil mixing bin 3 is arranged on one side of the raw oil collecting box 2, the circulating oil temporary storage mechanism and the raw oil collecting box 2 are respectively communicated with the combined oil mixing bin 3 through a constant-speed feeding mechanism, the wax oil fractionated in the heat exchange condensation tower 1 is led out through an oil discharge pump 5 and further injected into a wax oil buffer tank 4, the wax oil is used as circulating oil, in order to ensure the smoothness of oil discharge, a pressure release valve 6 is arranged on the wax oil buffer tank 4, when the gas pressure in the tank exceeds a set value, gas can be discharged, the oil can be ensured to smoothly enter the wax oil buffer tank 4, the liquid level of the oil in the wax oil buffer tank 4 can be monitored by a liquid level monitoring assembly in the wax oil buffer tank 4 by utilizing a circulating oil temporary storage mechanism, the oil level height can be automatically adjusted according to a monitoring result, the supply amount of the circulating oil in the whole coking operation process can be effectively ensured, and meanwhile, a temperature control adjusting assembly at the side part of the wax oil buffer tank 4 is matched to automatically adjust the oil temperature of the circulating oil in the wax oil buffer tank 4, and the subsequent operation process can be ensured, the mobility of fluid and to carrying out the function of auxiliary heating to raw oil, utilize constant speed feed mechanism to adjust the supply volume of raw oil and circulating oil, thereby realize the effective control to coking operation circulation ratio, make in the combined oil of resupply heating furnace, the ratio of raw oil and circulating oil keeps relatively stable, further reduce the temperature variation gradient of the raw oil that enters into the coking tower among the coking operation process, be provided with separation filter mechanism on one side of the exit end of combined oil blending bin 3 simultaneously, utilize separation filter mechanism to separate the fine coke granule and the catalyst powder of mixing in the combined fluid, thereby improve coking operation stability, improve needle coke coking quality.

As can be seen from fig. 1 to 5 and fig. 7 of the specification, in the implementation process, the temperature control adjustment assembly includes: heat preservation housing 7, heating pipe 8, heat conduction inside lining 9 and temperature sensor 10, heat preservation housing 7 spiral-lock in the 4 outsides of wax oil buffer tank, heating pipe 8 sets up in heat preservation housing 7, and heat conduction inside lining 9 pastes and adorns on 4 outside wall surfaces of wax oil buffer tank and paste mutually with heating pipe 8, and temperature sensor 10 pastes and adorns on 4 inside wall surfaces of wax oil buffer tank, and wherein the liquid level monitoring subassembly includes: level sensor 11 and reposition of redundant personnel drain component, level sensor 11 sets up in wax oil buffer tank 4, and reposition of redundant personnel drain component sets up in 4 one sides of wax oil buffer tank and is linked together with wax oil buffer tank 4, and above-mentioned reposition of redundant personnel drain component includes: the device comprises a flow guide pipe 12, a liquid-discharging tar pump 13, a circulating buffer tank 29 and a circulating tar pump 14, wherein one end of the flow guide pipe 12 is inserted into a wax oil buffer tank 4, the liquid inlet end of the liquid-discharging tar pump 13 is communicated with the flow guide pipe 12, the circulating buffer tank 29 is communicated with the liquid outlet end of the liquid-discharging tar pump 13, the liquid inlet end of the circulating tar pump 14 is communicated with the circulating buffer tank 29, and the liquid outlet end of the circulating buffer tank 4 is communicated with the wax oil buffer tank 4, when in use, the temperature of oil in the wax oil buffer tank 4 is monitored by using a temperature sensor 10, the heating power of a heating pipe 8 at the inner side of a heat-insulating housing 7 is adjusted according to the monitoring result, and heat exchange is carried out with the side wall of the wax oil buffer tank 4 through a heat-conducting lining 9, so that the temperature of the oil in the wax oil buffer tank 4 is uniformly adjusted, the liquidity of the wax oil can be ensured, and raw oil can be further heated in the subsequent oil mixing process, meanwhile, the liquid level of the oil in the wax oil buffer tank 4 is monitored by using the liquid level sensor 11, when the height of the oil level exceeds a set value, the liquid discharge tar pump 13 on one side of the flow guide pipe 12 is started, redundant wax oil is pumped out by using the liquid discharge tar pump 13 and is further injected into the circulating buffer tank 29, when the height of the liquid level in the wax oil buffer tank 4 is lower than the set value, the circulating tar pump 14 is started, and the oil in the circulating buffer tank 29 is injected into the wax oil buffer tank 4 by using the circulating tar pump 14, so that the oil amount in the wax oil buffer tank 4 is kept at a relatively stable numerical value, and further, the effective control on the circulation ratio is ensured in the subsequent operation process.

As can be seen from the accompanying fig. 1-4 of the specification, in the specific implementation process, the constant-speed feeding mechanism comprises: an oil guide pipe 15, a feeding pump 16 and a flowmeter 17, wherein one end of the oil guide pipe 15 is communicated with the wax oil buffer tank 4, the inlet end of the feeding pump 16 is communicated with the oil guide pipe 15, the other end of the feeding pump 16 is communicated with the combined oil mixing bin 3, the flowmeter 17 is sleeved on the oil guide pipe 15 and is positioned at one side of the feeding pump 16, when in use, the circulating oil in the wax oil buffer tank 4 is pumped out by a feed pump 16 at one end of an oil guide pipe 15 between the wax oil buffer tank 4 and the combined oil mixing bin 3 and is injected into the combined oil mixing bin 3, meanwhile, the flow meter 17 is utilized to accurately control the oil quantity of the injected circulating oil, and in the same way, the oil supply pipeline between the raw oil collecting box 2 and the combined oil mixing bin 3 can be controlled to inject the raw oil into the combined oil mixing bin 3 at a constant speed and in a quantitative manner, thereby accurately controlling the proportion between the circulating oil and the raw oil, and improving the operation stability and the quality of the coking product.

As can be seen from fig. 1 to 4, fig. 6 and fig. 8 of the specification, in the specific implementation process, the separation and filtration mechanism comprises: lead oil pump 18, filter storehouse 19, filter the separator subassembly, middle buffer tank 20 and pressure boost tar pump 21, the feed liquor end of leading oil pump 18 is linked together with joint oil blending bin 3, filter storehouse 19 and set up and lead the play liquid of oil pump 18 and serve, filter the separator subassembly and set up in filtering storehouse 19, middle buffer tank 20 sets up on the exit end of filtering storehouse 19, pressure boost tar pump 21's feed liquor end is linked together with middle buffer tank 20, pressure boost tar pump 21's drainage end and coking tower supply oil pipe way are linked together, wherein filter the separator subassembly includes: spacing seat 22, annular frame 23, grid filter screen 24, adsorb filter screen 25 and assembly connecting component, spacing seat 22 sets up in filtering storehouse 19, annular frame 23 cartridge is in filtering storehouse 19 and one end pastes with spacing seat 22 mutually, grid filter screen 24 is fixed to be inlayed and is served in annular frame 23, adsorb filter screen 25 and set up on the other end of annular frame 23, the assembly connecting component sets up and is served and be connected with annular frame 23 in filtering storehouse 19, above-mentioned assembly connecting component includes: the installation seat 26, the thrust collar 27 and the rubber seal ring 28, the installation seat 26 is fixedly arranged in the filtering bin 19 and is positioned on one side of the annular frame 23, the installation seat 26 is provided with a stepped groove, the annular frame 23 penetrates through the installation seat 26 and one end of the annular frame 23 is attached to the bottom end face of the stepped groove, the inner annular face of the stepped groove is provided with a threaded groove, the outer annular face of the thrust collar 27 is provided with threads, the thrust collar 27 is spirally arranged in the stepped groove, the rubber seal ring 28 is arranged on the end face of the thrust collar 27 and is attached to the annular frame 23, when the combined oil mixing bin is used, circulating oil and raw oil enter the combined oil mixing bin 3 according to a certain circulation ratio, are mixed in the combined oil mixing bin 3, are pumped out through the oil guide pump 18 at the lower part and are pressurized and then injected into the filtering bin 19, and residual coke powder and catalyst powder in the combined oil are filtered and separated through the grid filter screen 24 and the adsorption filter screen 25 in the filtering bin 19, therefore, for improving the quality of the combined oil, the filtered combined oil further enters the intermediate buffer tank 20 for temporary storage, is further pumped out and pressurized by the pressurized tar pump 21, is supplied to the heating furnace at one end of the oil inlet pipeline of the coking tower for heating, and then enters the coking tower for coking, through the arrangement of the multi-stage buffer structure, the continuation and stability of oil liquid between all links can be effectively ensured, so that the continuity of oil supply can be effectively ensured, wherein when important points are required, the grid filter screen 24 and the adsorption filter screen 25 are arranged in the annular frame 23, because the grid filter screen 24 and the adsorption filter screen 25 are seriously consumed in the actual production operation process, the replacement is frequently required, and in order to improve the convenience of the replacement operation, the annular frame 23 and the filter bin 19 are connected by plug-in assembly, utilize thrust ring 27 to block admittedly to annular frame 23, the installation and dismantle the operation all comparatively convenient, set up rubber seal 28 simultaneously between thrust ring 27 and annular frame 23, can further improve the sealing performance of hookup location, pass through rubber seal 28's elastic support effect between thrust ring 27 and the annular frame 23 simultaneously, can further improve the stability of blocking admittedly, avoid rigid contact to protect thrust ring 27 simultaneously.

In the specific implementation process, as preferred setting, above-mentioned annular frame 23 is stainless steel tubular structure, and the one end of annular frame 23 is equipped with the ladder boss, ladder boss and spacing seat 22 phase-match, and the other end of annular frame 23 is provided with annular seat, and the ladder groove phase-match in annular seat and the mount pad 26 adopts the tubular structure design of integral type, can effectively guarantee the structural strength of annular frame 23, keeps structural stability under the high pressure effect, and can effectively improve assembly efficiency.

In the specific implementation process, the filtering and separating mechanism can adopt double channels arranged in parallel, the double channels are arranged according to actual use requirements, and the double channels can be used for one by one, so that when the filtering component is replaced, the whole device does not need to be stopped for waiting, and the production and processing efficiency of the needle coke can be further improved.

In conclusion, the circulating oil temporary storage system for producing the oil-series needle coke is characterized in that a circulating oil temporary storage mechanism is arranged on one side of a wax oil outlet end of a heat exchange condensing tower 1, a raw oil collection box 2 is arranged on the lower portion of the heat exchange condensing tower 1, a combined oil mixing bin 3 is arranged on one side of the raw oil collection box 2, the circulating oil temporary storage mechanism and the raw oil collection box 2 are respectively communicated with the combined oil mixing bin 3 through a constant-speed feeding mechanism, the circulating oil temporary storage mechanism can be used for controlling the temperature of oil in a wax oil buffer tank 4 and adjusting the quantity of wax oil, so that the supply quantity of circulating oil is kept stable in the subsequent operation process, the constant-speed feeding mechanism is used for adjusting the supply quantities of raw oil and circulating oil, the effective control of the cycle ratio of coking operation is realized, and the ratio of the raw oil to the circulating oil in the combined oil returned to a heating furnace is kept relatively stable, the temperature change gradient of the raw oil entering the coking tower in the coking operation process is further reduced, meanwhile, a separation filtering mechanism is arranged on one side of the outlet end of the combined oil mixing bin 3, coke powder particles and catalyst powder mixed in the combined oil are separated by the separation filtering mechanism, the coking operation stability is improved, the needle coke coking quality is improved, and the problems that in the prior art, the supply amount of circulating oil cannot be effectively controlled, the supply stability is poor, and partial coke powder particles which are difficult to coke and catalyst powder in the raw material clarified oil pretreatment process can be remained in wax oil fractions, a certain influence is caused on the whole circulating oil supply path, and the needle coke coking quality is influenced are solved.

The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.