CN219469982U - Petroleum coke and coal tar coke continuous closed operation device - Google Patents

Abstract

A continuous closed running device for petroleum coke and coal tar coke is used for the comprehensive treatment of clean production of petroleum coke and coal tar coke. The device comprises a coke airtight output system, a coke powder drying system, an exhaust gas treatment system and a control system. The device is characterized in that coke is conveyed into a closed coke pool shared by two towers through hydraulic power, the coke deposited in the coke pool is dehydrated through a spiral conveying separator, and is output to a dewatering bin through a closed belt lifting machine, and the cyclic purification of cut coke water and the independent output of powdered coke are carried out through a low-speed dewatering drum and a negative pressure filtering coke powder drier. The utility model does not change the original structure of the coking device, has simple and compact equipment arrangement, small transferring and conveying load and high cutting Jiao Shuili utilization rate, can reduce the blockage probability of the pipe blockage of the powdered coke, effectively improves the quality of finished coke products, and has simple and convenient equipment maintenance, small investment and high comprehensive benefit.

Description

Petroleum coke and coal tar coke continuous closed operation device

Technical Field

The utility model relates to the technical field of petrochemical oil refining, in particular to a comprehensive treatment device for clean production in the delayed coking hydraulic decoking process.

Background

The delayed coking is the main processing means adopted by refineries at home and abroad for inferior heavy oil, is a thermal processing technology for converting residual oil into coking gas, coking gasoline, coking diesel oil, coking wax oil and petroleum coke by adopting high-temperature deep cracking, and is also the main industrialized form of the coking process (coking for short) of petroleum coke and coal tar. Petroleum coke (containing needle coke) generated in the delayed coking device is processed into fragments by a hydraulic decoking system and discharged out of the coking tower. The traditional hydraulic decoking system adopts an open or semi-closed (coke cooling water circulation treatment process) coke pond water filtering and grab bucket machine transferring mode; in the processes of water-cooling coke, coke soaking and overflow of the device before decoking, a large amount of coke blocks with high oil content, sulfur content, powder content sewage and oil content and water content, the temperature of which is about 100 ℃, can be generated. During hydraulic decoking, high-temperature coke, coke cooling water, overflow water and coke cutting water are directly discharged into a coke tank, and harmful substances such as coke powder, sulfides, VOCs and the like generated in the coke tank are volatilized along with high-temperature steam, so that the surrounding ecological environment is seriously polluted. Therefore, how to treat coking waste gas, waste water and dust, improve the operation environment and reduce pollution is a technical problem which needs to be solved urgently.

At present, the technology for sealing and decoking and transferring at home and abroad mainly comprises the steps of crushing coke by adopting a tower bottom crusher in the decoking process, then, dropping the crushed coke into a mixing bin, continuously feeding all solid coke which is changed into coke slurry into a dewatering bin for dewatering by a large water-coke ratio mixing and transferring pump, and sealing, outputting, loading and transferring the dry coke; the other mode is that the coke is crushed at the bottom of the tower and then directly falls into a dewatering bin for dewatering and then is output to dry coke, or the original coke pool is changed into the dewatering bin with bottom filter, and after the coke is dried after the coke is removed, lifting equipment is adopted for closed conveying and transferring.

The following drawbacks exist with the use of the above technique:

the tower bottom crusher needs to change the derrick design structure of the traditional delayed coking device, is difficult to install and implement by utilizing the traditional device structure, and has large occupied area and large investment;

the single coke tower is independently provided with complete equipment, and emergency production when equipment faults can not be met by adopting backup equipment in a key dehydration process;

in the coke conveying and lifting process, a slurry pump or a lifting machine with high rotating speed is adopted, so that the coke crushing rate is increased, and the quality grade of a finished coke product is influenced;

the continuous dehydration, transportation and transportation cannot be performed in the decoking process, the load rate of transportation equipment is high, and the water and electricity consumption is high;

the filter screen cannot be continuously dredged and cleaned in the dehydration process, and repeated filtration of fine powder often causes bin blockage and pipe blockage;

the large water quantity of the water-coke mixed dewatering bin is dewatered for a long time, arch tower bridges in the dewatering bin tank are easy to cause, coke discharging is difficult, equipment is complex and inconvenient to maintain, and equipment production is often stopped due to faults.

Disclosure of Invention

The utility model aims to overcome the defects of the conventional petroleum coke hydraulic continuous Jiao Mibi conveying and transferring technology, and provides a petroleum coke and coal tar coke continuous closed running device so as to realize coke and water separation, storage and transfer treatment, thereby achieving the purposes of easy device transformation, simple and stable equipment, high degree of automation, maintenance reduction, investment reduction and running consumption reduction and ensuring continuous, stable and clean production of a delayed coking device.

In order to achieve the aim of the utility model, the continuous closed running device mainly comprises a coke closed output system, a coke powder drying system, an exhaust gas treatment system and a control system;

the bottoms of the two coke towers of the coke airtight output system are connected with airtight coke chute, and the outlet of the airtight coke chute is connected with the airtight coke pool; the spiral conveying separator is obliquely arranged in the closed coke pond, one end below the water surface is connected with an underwater bearing below the maintenance platform, the other end is connected with a speed reducer outside the outlet of the closed coke pond, cut coke and cut coke water are evenly paved in the closed coke pond through two paths of auxiliary punches Jiao Shuiguan and are conveyed upwards to the closed belt lifting machine under the rotation of the spiral conveying separator, and a separating belt conveyor of the switching belt distributor enters two or more independent dewatering bins for dewatering and draining and then is output; the overflow port of the closed coke pond is connected with a low-speed rotary drum dehydrator, the low-speed rotary drum dehydrator drags out fine coke powder larger than 8mm through a filter screen, the fine coke powder falls into a receiving hopper under the action of a compressed air back-flushing device after rotating, the filter screen is continuously cleaned by a pressure water flow back-flushing device at the side surface of the low-speed rotary drum dehydrator, a slurry pump extracts concentrated coke slurry in a coke discharging channel as slag discharging power of the receiving hopper, and the mixed and filtered coke powder is sent back to the closed coke pond to be output through a spiral conveying separator; a filter tank is arranged below the low-speed drum dehydrator, an overflow channel is arranged in the filter tank, a mud scraper is arranged at the bottom of the filter tank to scrape fine coke powder into a coke discharging channel, the cut coke water and the fine coke powder filtered by the low-speed drum dehydrator enter a negative pressure filter coke powder desiccator of a coke powder desiccation system through the coke discharging channel to be output, and the filtered clear water enters a sedimentation tank; the clear water of the sedimentation tank is sent into a closed Jiao China to be burnt and stirred by a water pump I and a water pump II, and waste gas enters a waste gas treatment system through a gas collecting channel by adopting a fan; after the decoking is finished, the supernatant in the sedimentation tank is lifted to a high-level water tank by a pump for recycling.

Further, the closed coke pond is a concave pond with a steel structure or a cement structure, an inlet is connected with the coke chute, an overhaul platform is arranged above an outlet of the coke chute and is connected with an underwater bearing at the bottom of the pond through a steel cable, the underwater bearing is arranged at the bottom of a U-shaped groove of the closed coke pond, two auxiliary coke flushing water pipes are arranged at two sides of the closed coke pond and are respectively connected with a first water pump and a second water pump, and the upper part of the closed coke pond is integrally closed by adopting a sealing cover; the outlet of the closed coke pool is in butt joint with the closed belt lifting machine, the height of the outlet is two meters greater than that of the overflow port of the closed coke pool, and the speed reducer is arranged outside the outlet of the closed coke pool; the overflow port of the closed coke pond is connected with a low-speed drum dehydrator, and the height of the overflow port is lower than the height of the outlet of the closed coke chute.

Further, the number of the spiral conveying separators is two, the inside of the spiral conveying separators is a main shaft, and detachable spiral blades are spirally arranged on the main shaft; the spiral conveying separator is obliquely arranged in the U-shaped groove of the closed coke pond, one end of the spiral conveying separator under water is connected with the underwater bearing, and the other end of the spiral conveying separator is connected with the speed reducer outside the outlet of the closed coke pond.

Further, the outer wall of the low-speed rotary drum dehydrator is a stainless steel filter screen, the inner wall of the low-speed rotary drum dehydrator is uniformly provided with a vane type sieve plate along the circumferential direction, the rotary drum rotates to drive fine coke powder to dehydrate, a receiving hopper is inlaid in the rotary drum to automatically finish fine coke powder collection, then coke discharging adopts a slurry pump flushing or belt pulling mode, a compressed air back flushing device is connected above the low-speed rotary drum dehydrator, and a pressure water flow back flushing device is connected to the side face of the low-speed rotary drum dehydrator.

Further, the filter pond is located below the low-speed drum dehydrator, the outlet of the filter pond is connected with the gate valve and the coke discharging channel, the overflow port for keeping the water level of the filter pond is connected with the overflow channel to lead to the coke discharging channel, the bottom of the pond is provided with a mud scraper, and the mud scraper and the gate valve are periodically opened to push fine coke powder deposited in the filter pond into the coke discharging channel.

Further, the coke powder drying system outputs fine coke powder in a negative pressure filtering, belt filtering or centrifugal drying mode, or the coke cutting water and the fine coke powder are directly conveyed to a sedimentation tank through a coke discharging channel to be sealed, kept stand and precipitated and then are independently output.

Further, a plurality of sets of water filtering nets for drying and separating the coke and water conveyed by the separating belt conveyor are vertically arranged in the dewatering bin.

Further, the waste gas treatment system is connected with the coke tower, the closed coke pond, the low-speed drum dehydrator, the dewatering bin and the high-level water tank through a fan, the fan sends waste gas of each path of waste gas collecting pipeline into the waste gas treatment system, after removing coke powder, moisture, oil slick, mercaptan and hydrogen sulfide, the desulfurized dry gas containing a small amount of VOCs is sent into a heating furnace combustion device air inlet duct of the waste gas treatment system for combustion treatment and then is discharged.

According to the utility model, the two towers share the sealed coke pool on the basis of the original coke pool, and after decoking is started, the cold coke water in the coke tower can be integrated into the sealed coke pool for centralized treatment; the multi-path auxiliary punch Jiao Shuiguan stirring design in the closed coke tank can effectively prevent coke accumulation in the closed coke tank from blocking the closed coke chute, and is convenient for the spiral conveying separator to drag out coke; the two spiral conveying separators are used for one, continuously run to drag out coke in the closed coke pond, and are conveyed into the closed belt lifter or the chain bucket lifter, and the separated belt conveyor of the switching belt distributor enters two or more independent dewatering bins to be dewatered and filtered and then output; flushing fine coke powder which is fished out by the low-speed dewatering drum and is larger than 8mm back to a closed Jiao China through a slurry pump, filtering the overflow cut coke water in the closed coke pond and the fine coke powder which is smaller than 8mm through the low-speed dewatering drum, and conveying the filtered fine coke powder to a negative-pressure filtering coke powder drier; the negative pressure filtering coke powder dryer can independently dehydrate and dry fine coke powder smaller than 8mm, then independently output, and purified water is returned to the closed coke pond through a pump for recycling; after the waste gas collecting pipelines of all the equipment are collected, the waste gas is sent to a waste gas treatment system, after coke powder, moisture and oil slick are removed, dry gas is sent to a desulfurization system of the waste gas treatment system to remove mercaptan and hydrogen sulfide, and finally the desulfurization dry gas containing a small amount of VOCs is sent to a heating furnace combustion device air inlet duct of the waste gas treatment system for combustion treatment.

Compared with the prior art, the utility model has the following advantages:

1. the sealed coke tank can be newly built in the original coke tank by utilizing the original coke tower, a tower bottom valve and other equipment, so that the equipment transformation cost is reduced, and the transformation time is shortened.

2. The two coke drums share the same set of airtight transfer device, the spiral conveying separator in the airtight coke tank is used for one preparation, continuous dehydration operation is adopted, the load rate of transfer equipment is low, the water and electricity consumption is small, the structure is simple, the maintenance is easy, and meanwhile, an overhaul platform is arranged in the airtight coke tank, so that the equipment can be overhauled and maintained at any time.

3. The fine coke powder is filtered by adopting the low-speed dehydration rotary drum, the filter screen can be cleaned in the continuous dehydration process, and the rotary drum filter screen is detachable and convenient to replace; the fine coke powder is filtered again by the negative pressure filtering coke powder drying machine, so that the occurrence of coke powder bin blockage and pipe blockage in the decoking process can be reduced.

4. And in the coke conveying and lifting processes, a low-rotation-speed spiral conveying separator and a dewatering drum are adopted, so that the coke crushing rate of the coke is reduced, and the quality of a finished coke product is effectively improved.

5. The whole equipment is compact in arrangement, and does not occupy other plane positions except the original coke pond.

Drawings

Fig. 1 is a system configuration diagram of the present utility model.

Fig. 2 is a block diagram of the closed coke oven of fig. 1.

FIG. 3 is a block diagram of the screw conveyor separator of FIG. 1.

Fig. 4 is a block diagram of the low speed drum dehydrator of fig. 1.

Fig. 5 is a block diagram of the filter basin of fig. 1.

Detailed Description

As shown in fig. 1, 2, 3, 4 and 5, the continuous closed operation device of the present utility model mainly comprises a coke closed output system, a coke powder drying system, an exhaust gas treatment system 27 and a control system.

A closed coke chute 3 is connected below the bottom valves 2 of the two coke drums 1 of the coke closed output system, the outlet of the closed coke chute 3 is connected with a closed coke pond 4, and the two coke drums 1 share a set of closed operation device; two spiral conveying separators 7 are obliquely arranged in the closed coke pond 4 according to a certain angle, one end below the water surface is connected with an underwater bearing 5 below the overhaul platform 6, and the other end is connected with a speed reducer 8 outside the outlet of the closed coke pond 4; the decoking process is started, the cut coke water and the coke enter the closed coke tank 4 through the closed coke chute 3, the cut coke and the cut coke water are evenly spread in the closed coke tank 4 through two paths of auxiliary coke flushing water pipes 25, the coke flushing water pipes 25 can prevent the coke from accumulating in the closed coke tank 4, the closed coke chute 3 is blocked, the spiral conveying separator 7 is ensured to evenly output the coke, and the coke falls into the bottom of the closed coke tank 4; the coke is obliquely lifted under the rotation of a spiral conveying separator 7, after the coke is lifted to the water surface of the closed coke pond 4 by about two meters in height, the coke is fished out through the outlet of the closed coke pond 4 and conveyed into a closed belt lifter 10 or a chain bucket lifter, a separating belt conveyor 11 of a switching belt distributor enters two or more independent dewatering bins 12 for dewatering and draining, a plurality of sets of water filtering nets are vertically arranged in the dewatering bins 12, the conveyed coke and water are dried and separated, and the coke is transported outwards after the water content of the coke is met; the overflow port 9 of the closed coke pond 4 is connected with a low-speed rotary drum dehydrator 13, fine coke powder larger than 8mm is fished out by the low-speed rotary drum dehydrator 13 through a filter screen, the fine coke powder falls into a receiving hopper 14 under the action of a compressed air back-flushing device 32 after rotating, a pressure water flow back-flushing device 33 continuously cleans the filter screen at the side surface of the low-speed rotary drum dehydrator 13, a slurry pump 18 extracts concentrated coke slurry in a coke discharging channel 17 as slag discharging power of the receiving hopper 14, and mixed and filtered fine coke powder is sent back to the closed coke pond 4 to be output through a spiral conveying separator 7; a water filtering pool 15 is arranged below the low-speed drum dehydrator 13, an overflow channel 34 is arranged in the water filtering pool 15, a mud scraper 16 is arranged at the bottom of the water filtering pool 15 to scrape fine coke powder below 8mm into a coke discharging channel 17, cut coke water and fine coke powder filtered by the low-speed drum dehydrator 13 enter a negative pressure filter coke powder dryer of a coke powder drying system 19 through the coke discharging channel 17, the fine coke powder is dried and then output, or the cut coke water and the fine coke powder are directly conveyed to a sedimentation tank 20 through the coke discharging channel 17 to be hermetically and statically deposited and then are singly output through a grab bucket or after the water of the sedimentation tank 20 is discharged, and the coke powder drying system 19 adopts a negative pressure filter, belt filter or centrifugal drying mode; the filtered clear water enters a sedimentation tank 20; the clear water of the sedimentation tank 20 is sent into the closed coke tank 4 by the two water pumps I23 and II 24 to be washed and stirred; the waste gas enters the waste gas treatment system 27 through a gas collecting channel, the waste gas treatment system 27 is connected with the coke tower 1, the closed coke pond 4, the low-speed drum dehydrator 13, the dewatering bin 12 and the high-level water tank 22 through a fan 26, the fan 26 sends the waste gas of each path of waste gas collecting pipeline into the waste gas treatment system 27, after removing coke powder, moisture, floating oil, mercaptan and hydrogen sulfide, the desulfurized dry gas containing a small amount of VOCs is sent into an air inlet duct of a heating furnace combustion device of the waste gas treatment system 27 for combustion treatment and then is discharged; after the decoking is finished, the supernatant in the sedimentation tank 20 is lifted to a high-level water tank 22 by a pump 21 for recycling.

The closed coke pond 4 is a concave pond with a steel structure or a cement structure, an inlet is connected with the coke chute 3, the overhaul platform 6 is arranged above the outlet of the coke chute 3 and is connected with the underwater bearing 5 at the bottom of the pond through a steel cable 31, the underwater bearing 5 is arranged at the bottom of the U-shaped groove of the closed coke pond 4, two auxiliary coke flushing water pipes 25 are arranged at two sides of the closed coke pond 4 and are respectively connected with the first water pump 23 and the second water pump 24, and the upper part of the closed coke pond 4 is integrally sealed by adopting a sealing cover 28; the outlet of the closed coke tank 4 is in butt joint with a closed belt lifting machine 10, the height of the outlet is two meters greater than that of an overflow port 9 of the closed coke tank 4, and a speed reducer 8 is arranged outside the outlet of the closed coke tank 4; the overflow port 9 of the closed coke pond 4 is connected with a low-speed drum dehydrator 13, and the height of the overflow port 9 is lower than the height of the outlet of the closed coke chute 3.

The inside of the spiral conveying separator 7 is provided with a main shaft 29, and a detachable spiral blade 30 is spirally arranged on the main shaft 29; the spiral conveying separator 7 is obliquely arranged in the U-shaped groove of the closed coke pond 4, one underwater end is connected with the underwater bearing 5, and the other end is connected with the speed reducer 8 outside the outlet of the closed coke pond 4; the two spiral conveying separators 7 are used for one time, continuous dehydration operation is adopted, the load rate of transfer equipment is low, the water and electricity consumption is small, the structure is simple, and the maintenance is easy.

The outer wall of the low-speed drum dehydrator 13 is a stainless steel filter screen 36, the inner wall is uniformly provided with a vane type sieve plate 37 along the circumferential direction, the drum rotates to drive fine coke powder to dehydrate, a receiving hopper 14 is inlaid in the drum to automatically collect the fine coke powder, then the fine coke powder is discharged by flushing with a slurry pump 18 or pulling out the fine coke powder with a belt, and the like, a compressed air back-flushing device 32 is connected above the low-speed drum dehydrator 13, and a pressure water flow back-flushing device 33 is connected on the side surface of the low-speed drum dehydrator 13.

The filter tank 15 is positioned below the low-speed drum dehydrator 13, the outlet of the filter tank 15 is connected with a gate valve 35 and a coke discharging channel 17, the overflow port is connected with an overflow channel 34 and leads to the coke discharging channel 17, the filter tank 15 is used for keeping the water level, a mud scraper 16 is arranged at the bottom of the filter tank, and the mud scraper 16 and the gate valve 35 are periodically opened to push fine coke powder deposited in the filter tank 15 into the coke discharging channel 17.

Claims (8)

1. A petroleum coke and coal tar coke continuous closed operation device is characterized in that: the continuous closed operation device comprises a coke closed output system, a coke powder drying system, an exhaust gas treatment system (27) and a control system;

the lower parts of tower bottom valves (2) of two coke towers (1) of the coke closed output system are connected with a closed coke chute (3), and an outlet of the closed coke chute (3) is connected with a closed coke tank (4); the spiral conveying separator (7) is obliquely arranged in the closed coke pond (4), one end below the water surface is connected with the underwater bearing (5) below the overhaul platform (6), the other end is connected with the speed reducer (8) outside the outlet of the closed coke pond (4), cut coke and cut coke water are evenly paved in the closed coke pond (4) through two paths of auxiliary punches Jiao Shuiguan (25), and are conveyed upwards to the closed belt lifter (10) under the rotation of the spiral conveying separator (7), and the sub-bin belt conveyor (11) of the transfer belt distributor enters two or more independent dewatering bins (12) for dewatering and draining and then is output; an overflow port (9) of the closed coke pond (4) is connected with a low-speed rotary drum dehydrator (13), fine coke powder larger than 8mm is fished out by the low-speed rotary drum dehydrator (13) through a filter screen, the fine coke powder falls into a receiving hopper (14) under the action of a compressed air back-flushing device (32) after rotating, a pressure water flow back-flushing device (33) continuously cleans the filter screen at the side surface of the low-speed rotary drum dehydrator (13), a slurry pump (18) extracts concentrated coke slurry in a coke discharging channel (17) as slag discharging power of the receiving hopper (14), and mixed and filtered coke powder is returned to the closed coke pond (4) to be output through a spiral conveying separator (7); a water filtering tank (15) is arranged below the low-speed rotary drum dehydrator (13), an overflow channel (34) is arranged in the water filtering tank (15), a mud scraper (16) is arranged at the bottom of the water filtering tank (15) to scrape fine coke powder into a coke discharging channel (17), the cut coke water and the fine coke powder filtered by the low-speed rotary drum dehydrator (13) enter a negative pressure filter coke powder desiccator of a coke powder desiccation system (19) through the coke discharging channel (17) to be output, and the filtered clear water enters a sedimentation tank (20); the clear water of the sedimentation tank (20) is sent into the closed coke tank (4) by the two paths of water pumps (23) and the water pump (24) to be washed and stirred, and waste gas enters the waste gas treatment system (27) through the gas collecting channel by adopting the fan (26); after the decoking is finished, the supernatant in the sedimentation tank (20) is lifted to a high-level water tank (22) through a pump (21) for recycling.

2. The petroleum coke and coal tar coke continuous closed operation device according to claim 1, wherein: the closed coke tank (4) is a concave tank with a steel structure or a cement structure, an inlet is connected with the coke chute (3), the overhaul platform (6) is arranged above an outlet of the coke chute (3) and is connected with an underwater bearing (5) at the bottom of the tank through a steel cable (31), the underwater bearing (5) is placed at the bottom of a U-shaped groove of the closed coke tank (4), two auxiliary punches Jiao Shuiguan (25) are arranged on two sides of the closed coke tank (4) and are respectively connected with a first water pump (23) and a second water pump (24), and the upper part of the closed coke tank (4) is integrally sealed by adopting a sealing cover (28); the outlet of the closed coke tank (4) is in butt joint with a closed belt lifting machine (10), the height of the outlet is two meters greater than that of an overflow port (9) of the closed coke tank (4), and a speed reducer (8) is arranged outside the outlet of the closed coke tank (4); the overflow port (9) of the closed coke pond (4) is connected with the low-speed drum dehydrator (13), and the height of the overflow port (9) is lower than the height of the outlet of the closed coke chute (3).

3. The petroleum coke and coal tar coke continuous closed operation device according to claim 1, wherein: the number of the spiral conveying separators (7) is two, a main shaft (29) is arranged in the spiral conveying separators, and detachable spiral blades (30) are spirally arranged on the main shaft (29); the spiral conveying separator (7) is obliquely arranged in a U-shaped groove of the closed coke pond (4), one end of the spiral conveying separator is connected with the underwater bearing (5) under water, and the other end of the spiral conveying separator is connected with the speed reducer (8) outside an outlet of the closed coke pond (4).

4. The petroleum coke and coal tar coke continuous closed operation device according to claim 1, wherein: the outer wall of the low-speed rotary drum dehydrator (13) is a stainless steel filter screen (36), the inner wall is uniformly provided with a vane type sieve plate (37) along the circumferential direction, the rotary drum rotates to drive fine coke powder to dehydrate, a receiving hopper (14) is inlaid in the rotary drum to automatically finish fine coke powder collection, coke discharging adopts a slurry pump (18) flushing or belt pulling mode, a compressed air back-flushing device (32) is connected above the low-speed rotary drum dehydrator (13), and a pressure water flow back-flushing device (33) is connected to the side surface of the low-speed rotary drum dehydrator (13).

5. The petroleum coke and coal tar coke continuous closed operation device according to claim 1, wherein: the filter tank (15) is positioned below the low-speed drum dehydrator (13), an outlet of the filter tank (15) is connected with a gate valve (35) and a coke discharging channel (17), an overflow port for keeping the water level of the filter tank (15) is connected with an overflow channel (34) to the coke discharging channel (17), a mud scraper (16) is arranged at the bottom of the filter tank, and the mud scraper (16) and the gate valve (35) are periodically opened to push fine coke powder deposited in the filter tank (15) into the coke discharging channel (17).

6. The petroleum coke and coal tar coke continuous closed operation device according to claim 1, wherein: the coke powder drying system (19) adopts a negative pressure filtering, belt filtering or centrifugal drying mode to output fine coke powder, or the coke cutting water and the fine coke powder are directly conveyed to the sedimentation tank (20) through the coke discharging channel (17) to be sealed, kept stand and precipitated and then are independently output.

7. The petroleum coke and coal tar coke continuous closed operation device according to claim 1, wherein: a plurality of sets of water filtering nets for drying and separating the coke and water conveyed by the separating belt conveyor (11) are vertically arranged in the dewatering bin (12).

8. The petroleum coke and coal tar coke continuous closed operation device according to claim 1, wherein: the waste gas treatment system (27) is connected with the coke tower (1), the closed coke pond (4), the low-speed rotary drum dehydrator (13), the dehydration bin (12) and the high-level water tank (22) through a fan (26), the fan (26) sends waste gas of each path of waste gas collecting pipeline into the waste gas treatment system (27), and after the coke powder, the moisture, the floating oil, the mercaptan and the hydrogen sulfide are removed, the desulfurized dry gas containing a small amount of VOCs is sent into a heating furnace combustion device of the waste gas treatment system (27) for combustion treatment and then is discharged.