A coke forced dewatering device, system and method

Abstract

The application provides a high-efficiency coke forced dehydration device, system and method, wherein the high-efficiency coke forced dehydration device is used for dehydrating coke in at least one coke tower and comprises a coke treatment assembly, the coke treatment assembly comprises a sealed distribution bin, at least one first material taking machine and at least one forced dehydration machine, the forced dehydration machine comprises a feeder and a vibrating screen, the first material taking machine is used for conveying coke in the sealed distribution bin from the coke tower to the feeder of the forced dehydration machine, a feeding gear in the feeder is used for conveying the coke in the feeder to the vibrating screen, the coke is subjected to dehydration treatment through a dehydration grid, the coke is subjected to secondary dehydration treatment through vibration of the vibrating screen and is conveyed out, and the coke is separated only through natural sedimentation in the prior art, so that the dehydration time is greatly shortened and the dehydration efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of delayed coking in petroleum chemical industry, in particular to a high-efficiency coke forced dehydration device, system and method. BACKGROUND

[0002] Delay coking is a process of converting residual oil and other poor feedstocks into gas, liquid products through thermal cracking, and generating concentrated solid-coke. At present, the method of hydraulic decoking is generally used in delayed coking devices, which principle is to use high-pressure water to cut the coke in the coke drum, and the cut coke flows into the coke storage pool together with the decoking water. The coke storage pool is open to the air, and the decoking water in the pool is precipitated and filtered through a baffle pool before being recycled. The coke in the pool needs to be dehydrated.

[0003] A petroleum coke conveying system is disclosed in Chinese patent No. 201210449183.6, which is composed of a closed coke storage pool, a petroleum coke pre-crushing device and a material taking equipment. The petroleum coke pre-crushing device is in communication with the closed coke storage pool, and the material taking equipment is arranged in the closed coke storage pool, part of which is arranged outside the closed coke storage pool. This system overcomes the defects of the prior art, such as serious pollution of surrounding environment by coke powder, damage to the health of operators and fire accidents during the process of material grabbing, discharging and rolling crushing. However, the process of this conveying system is complex, the dehydration efficiency is low due to natural dehydration, a large coke storage pool is needed, and the high-temperature corrosive environment in the coke storage pool seriously corrodes mechanical equipment, electrical equipment and instrument equipment, affecting the long-period operation of the device.

[0004] A petroleum coke closed conveying dehydration and circulating treatment device for delayed coking is disclosed in Chinese patent No. 201821726456.6, which is composed of a conveying mechanism, a dehydration and circulating mechanism, a tail gas treatment device and a hot air system. Coke and decoking water are separated by natural sedimentation in the dehydration bin, and the decoking water discharged after sedimentation contains coke powder, which needs to be pumped into the dehydration bin by a sewage pump for multiple filtration until the coke powder content in the decoking water meets the requirements. The filtration is only by the interception of coke, and the dehydration time of coke is as long as 10-40 hours, which is not good. The dehydration time is too long, and once a problem occurs in one of the links, it will directly affect the normal operation of the delayed coking device. SUMMARY

[0005] In view of the above problems, it is necessary to propose a high-efficiency coke forced dehydration device to solve or partially solve the above problems. The technical scheme of the present application is as follows:

[0006] In a first aspect, the present application provides a high-efficiency coke forced dehydration device for dehydrating coke in at least one coke tower, comprising a coke processing assembly, the coke processing assembly comprising: a sealed distribution bin, at least one first reclaimer, and at least one forced dehydration machine, wherein:

[0007] The first inlet of the sealed distribution bin is used to receive coke in the coke tower, and the first outlet of the sealed distribution bin is in full-plane sealed butt joint with the second inlet of the first reclaimer.

[0008] The second outlet of the first reclaimer is used to deliver coke to the forced dehydration machine.

[0009] The forced dehydration machine comprises a feeder and a vibrating screen, the third inlet of the feeder is used to receive coke delivered by the second outlet, the feeder is provided with a third outlet; the feeder is provided with a feeding gear, which is used to deliver coke from the third inlet to the third outlet, the feeding gear is provided with a dehydration grid for dehydrating coke during the delivery process; the fourth inlet of the vibrating screen is in sealed connection with the third outlet, the vibrating screen is used to dehydrate coke by vibration, and the dehydrated coke is delivered out through the fourth outlet of the vibrating screen.

[0010] Further, the forced dehydration machine further comprises a water storage tank arranged below the feeding gear and the vibrating screen.

[0011] Further, the coke processing assembly further comprises at least one crusher and at least one sealed coke chute, one end of the crusher is connected with the outlet of the coke tower through the sealed coke chute, and the other end of the crusher is in sealed connection with the first inlet.

[0012] Further, the coke processing assembly further comprises a sealed conveyor, the fifth inlet of the sealed conveyor is in sealed connection with the fourth outlet, and the fifth outlet of the sealed conveyor is used to deliver coke.

[0013] Further, the coke processing assembly further comprises at least one second reclaimer, the sixth inlet of the second reclaimer is in sealed connection with the second outlet, and the sixth outlet of the second reclaimer is in sealed connection with the third inlet.

[0014] Further, the first reclaimer is arranged obliquely, so that one end of the sixth outlet is higher than one end of the sixth inlet.

[0015] Further, the coke processing assembly comprises two forced dewatering machines and two first material taking machines, the first material taking machine is a bidirectional spiral material taking machine; the bidirectional spiral material taking machine is provided with two second discharge ports, the two second discharge ports are in sealing connection with the sixth inlets of the two first material taking machines respectively; the sixth discharge ports of the two first material taking machines are connected with the two third inlets respectively.

[0016] Further, a coke cutting water processing assembly is further included, the coke cutting water processing assembly comprises a water collecting pool, a slurry pump and a cyclone separator, the water collecting pool is connected with the water outlet of the water storage tank through a pipeline, one end of the slurry pump is connected with the water collecting pool through a pipeline, and the other end is connected with the inlet of the cyclone separator through a pipeline.

[0017] Further, the second material taking machine is provided with a water overflow hole near one end of the sixth inlet, and the water collecting pool is connected with the water overflow hole.

[0018] Further, the outlet of the cyclone separator is connected with the vibrating screen.

[0019] Further, a tail gas processing assembly is further included, the tail gas processing assembly comprises a condenser and at least four axial flow fans, one axial flow fan is connected with each of the coke towers, one axial flow fan is connected with the feeder and the vibrating screen respectively, one axial flow fan is connected with the closed conveyor, and the condenser is connected with the at least four axial flow fans.

[0020] Further, the tail gas processing assembly further comprises a liquid separation tank and an alkali washing tower, the inlet of the liquid separation tank is connected with the condenser, and the outlet of the liquid separation tank is connected with the alkali washing tower.

[0021] Further, the tail gas processing assembly further comprises an alkali liquor circulating pump, one end of the alkali liquor circulating pump is connected with the alkali liquor outlet of the alkali washing tower, and the other end is connected with the alkali liquor inlet of the alkali washing tower, so that the alkali liquor is recycled in the alkali washing tower.

[0022] Further, the tail gas processing assembly further comprises a waste alkali liquor overflow valve, the waste alkali liquor overflow valve is arranged between the alkali liquor circulating pump and the alkali liquor inlet of the alkali washing tower.

[0023] Further, the tail gas processing assembly further comprises a tail gas fan, the tail gas fan is connected with the alkali washing tower.

[0024] Further, the tail gas processing assembly further comprises a first tail gas valve, a second tail gas valve and a combustible gas detector, one end of the first tail gas valve is connected with the tail gas fan, and the other end is connected with an external coking heating furnace; one end of the second tail gas valve is connected with the tail gas fan; the combustible gas detector is arranged at the outlet of the tail gas fan and is in safety interlocking connection with the first tail gas valve.

[0025] In a second aspect, the present application provides a high-efficiency coke forced dehydration system, comprising a coking heating furnace and the high-efficiency coke forced dehydration device.

[0026] In a third aspect, the present application provides a high-efficiency coke forced dehydration method applied to the high-efficiency coke forced dehydration device, comprising:

[0027] The first material taking machine transports the coke from the coke tower in the sealed distribution bin to the feeder of the forced dehydration machine;

[0028] The feeding gear transports the coke in the feeder to the vibrating screen, and the coke is subjected to dehydration treatment through the dehydration grid during the transportation process;

[0029] The coke is subjected to secondary dehydration treatment through the vibration of the vibrating screen, and the coke after the secondary dehydration is transported out.

[0030] Based on the above technical solution, the present application has the following beneficial effects compared with the prior art:

[0031] The high-efficiency coke forced dehydration device provided by the present application, wherein the forced dehydration machine comprises a feeder, the feeding gear in the feeder is provided with a dehydration grid, and the coke is subjected to preliminary dehydration through the dehydration grid during the rotation and transportation of the feeding gear, and then the active dehydration of the coke is completed through the vibration of the vibrating screen, which is different from the separation by natural sedimentation in the prior art, thereby greatly reducing the dehydration time and improving the dehydration efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic diagram of the high-efficiency coke forced dehydration device in the first embodiment of the present application;

[0033] Figure 2 is a structural schematic diagram of the forced dehydration machine in the first and second embodiments of the present application;

[0034] Figure 3 is a structural schematic diagram of the high-efficiency coke forced dehydration device in the second embodiment of the present application;

[0035] Figure 4 is a flow schematic diagram of the high-efficiency coke forced dehydration method in the fourth embodiment of the present application.

[0036] In the attached diagram, 1-coke tower, 2-sealed coke chute, 3-crusher, 4-sealed distribution bin, 5-first feeder, 6-second feeder, 7-forced dewatering machine, 71-feeder, 72-feeding gear, 721-dewatering grid, 73-vibrating screen, 8-closed conveyor, 9-water collection tank, 10-slurry pump, 11-cyclone separator, 12-axial flow fan, 13-condenser, 14-liquid separator, 15-alkali washing tower, 16-tail gas fan, 17-alkali circulation pump, 18-coke cutting water tank, 19-material transfer bin, 20-first tail gas valve, 21-second tail gas valve, 22-waste alkali overflow valve. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0038] Example 1

[0039] This invention proposes a high-efficiency forced dehydration device for coke, combined with... Figure 1 , Figure 2 As shown, a coke processing assembly is used to dehydrate coke in at least one coke tower 1, comprising: a sealed dispensing bin 4, a first feeder 5, and a forced dewatering machine 7, wherein:

[0040] The first inlet of the sealed distribution bin 4 is used to receive coke from the coke tower 1, and the first outlet of the sealed distribution bin 4 is fully sealed and connected to the second inlet of the first feeder 5. Specifically, as shown... Figure 1 As shown, there are two coke towers 1, each with two first feed inlets. Each first feed inlet is sealed to the outlet of one of the two coke towers 1. The first discharge port of the sealed distribution bin 4 is fully sealed to the second feed inlet. This can be understood as the lower part of the sealed distribution bin 4 contracting to form the first discharge port. The first discharge port has the same shape and cross-sectional area as the second feed inlet, ensuring that there are no dead corners at the bottom of the sealed distribution bin 4, preventing coke from accumulating in these areas, and allowing all the coke to enter the first feeder 5.

[0041] The second discharge port of the first feeder 5 is used to transport coke to the forced dewatering machine 7. Two first feeders 5 can be set up, one for use and one for backup, to avoid the downtime of the equipment due to the failure or maintenance of one first feeder 5, and to improve the dewatering efficiency of the equipment.

[0042] The forced dewatering machine 7 includes a feeder 71 and a vibrating screen 73. The third inlet of the feeder 71 is used to receive coke conveyed from the second outlet, and the feeder 71 is provided with a third outlet.Figure 2 As shown, the feeder 71 is provided with a feeding gear 72 for conveying the coke from the third inlet to the third outlet, the feeding gear 72 is provided with a dehydration grid 721 for dehydrating the coke during the conveying process; the fourth inlet of the vibrating screen 73 is in sealing connection with the third outlet, the vibrating screen 73 is used for dehydrating the coke by vibration, and the dehydrated coke is conveyed out through the fourth outlet of the vibrating screen 73.

[0043] Since the mixture of coke and water contains a large amount of foul-smelling chemical substances such as hydrogen sulfide, mercaptans, hydrocarbons and organic halogen derivatives, most of which are harmful to human health, and also pollute the environment, the connections in the embodiment of the application are all sealing connections, so as to prevent the harmful substances from causing harm to human health and the environment.

[0044] The forced dehydration device for coke provided by the embodiment of the application has the forced dehydration machine 7 including the feeder 71, the dehydration grid 721 is arranged in the feeding gear 72 in the feeder 71, the coke is preliminarily dehydrated through the dehydration grid 721 during the conveying process of the feeding gear 72, and the active dehydration of the coke is completed through the vibration of the vibrating screen 73, which is different from the separation by only natural sedimentation in the prior art, so that the dehydration time is greatly shortened, and the dehydration efficiency is improved; in addition, a large storage pool is not needed, and the equipment does not need to be placed in the storage pool, so that the corrosion of the high-temperature corrosion environment in the storage pool to the mechanical equipment, electrical equipment and instrument equipment is avoided, and the device can be operated for a long period.

[0045] In some embodiments, the forced dehydration machine 7 further includes the water storage tank 74 arranged below the feeding gear 72 and the vibrating screen 73, which is used for collecting the water dehydrated by the feeding gear 72 and the vibrating screen 73, and plays a role of collection and temporary storage, so that the water is not directly splashed on the ground, and the collected water is more convenient to convey.

[0046] In some embodiments, the coke processing assembly further includes at least one crusher 3 and at least one sealing coke chute 2, one end of the crusher 3 is connected with the outlet of the coke tower 1 through the sealing coke chute 2, and the other end of the crusher 3 is in sealing connection with the first inlet. Figure 1As shown, the coke towers 1 are two, the crushers 3 and the sealed coke chute 2 are also correspondingly provided with two, and the first feed ports are also two. One end of each of the crushers 3 is connected with the outlet of one of the coke towers 1 through one of the sealed coke chutes 2, and the other end is sealingly connected with one of the first feed ports. After the coke in the coke tower 1 is removed by water, the coke is transported to the crusher 3 through the sealed coke chute 2. The crusher 3 crushes the coke to a preset size (such as 150mm-200mm) and directly enters the sealed distribution bin 4 below. The coke of appropriate size can be conveniently dehydrated by the subsequent forced dehydrator 7.

[0047] In some embodiments, the coke treatment assembly further comprises a second reclaimer 6, a sixth feed port of the second reclaimer 6 is sealingly connected with the second discharge port, and a sixth discharge port of the second reclaimer 6 is sealingly connected with the third feed port. The coke in the first reclaimer 5 enters the second reclaimer 6 through the sixth feed port, and the coke in the second reclaimer 6 enters the feeder 71 of the forced dehydrator 7 through the sixth discharge port. In actual use, the second reclaimer 6 can be inclinedly arranged so that one end of the sixth discharge port is higher than one end of the sixth feed port. The second reclaimer 6 transports the coke to an appropriate height and then enters the feeder 71 of the forced dehydrator 7. The angle of the second reclaimer 6 can be adjusted to adapt to coke towers 1 of different heights, improve the flexibility of the device, and reasonably utilize the site of the factory. The second reclaimer 6 is arranged to be inclined, a large amount of cutting water can be removed by gravity, the proportion of water in the coke is reduced, the moisture content of the coke entering the forced dehydrator 7 is lower, the dehydration time of the forced dehydrator 7 is reduced, and thus the dehydration efficiency is improved.

[0048] In some embodiments, the coke treatment assembly further comprises a closed conveyor 8, a fifth feed port of the closed conveyor 8 is sealingly connected with the fourth discharge port, and a fifth discharge port of the closed conveyor 8 is used to transport the coke out. In specific use, the fifth discharge port of the closed conveyor 8 can also be connected with an existing material transfer bin 19. The coke dehydrated by the forced dehydrator 7 is sent to the material transfer bin 19 through the closed conveyor 8. The entire device is transported in a closed environment, which ensures that it does not harm human health and the environment.

[0049] In some embodiments, the high-efficiency coke forced dehydration device further comprises a cutting water treatment assembly, such as Figure 1As shown, the cutting coke water treatment assembly includes a water collecting tank 9, a slurry pump 10, and a cyclone 11. The water collecting tank 9 is connected to the water outlet of the water storage tank 74 by a pipeline. One end of the slurry pump 10 is connected to the water collecting tank 9 by a pipeline, and the other end is connected to the inlet of the cyclone 11 by a pipeline. The water collecting tank 9 collects water in the water storage tank 74. The cutting coke water in the water collecting tank 9 is pumped by the slurry pump 10 and then enters the cyclone 11. The cutting coke water is separated from coke powder in the cyclone 11. The outlet of the slurry pump 10 is also provided with a turbulence pipeline connected to the water collecting tank 9 to return the cutting coke water to the water collecting tank 9, preventing coke powder from depositing in the water collecting tank 9.

[0050] In actual use, the outlet of the cyclone 11 can be connected to the vibrating screen 73. The coke powder separated in the cyclone 11 can be recycled into the vibrating screen 73. The cyclone 11 can be arranged above the vibrating screen 73, and the coke powder can enter the vibrating screen 73 by gravity. In specific use, the efficient coke forced dehydration device can also connect the cyclone 11 to the existing cutting coke water tank 18 to recycle the cutting coke water after the coke powder is removed. After the coke powder is removed by the cyclone 11, the cutting coke water with a particle content of less than 55 ppmwt (ppm represents the mass of solute contained in one million units of mass of solution, and wt is the weight percentage) enters the cutting coke water tank 18 for recycling.

[0051] In some embodiments, the second reclaimer 6 is provided with a water overflow hole near one end of the sixth inlet, and the water collecting tank 9 is connected to the water overflow hole. The second reclaimer 6 is arranged obliquely, and the cutting coke water separated by gravity flows into the water collecting tank 9 through the water overflow hole, so that the water pre-dehydrated by the second reclaimer 6 can be collected.

[0052] In some embodiments, the efficient coke forced dehydration device further includes a tail gas treatment assembly. The tail gas treatment assembly includes a condenser 13 and at least four axial flow fans 12. One of the axial flow fans 12 is connected to each of the coke towers 1, two of the axial flow fans 12 are connected to each of the forced dehydration machines 7, one of the axial flow fans 12 is connected to the closed conveyor 8, and the condenser 13 is connected to the at least four axial flow fans 12. Specifically, as shown in the figure, there are five axial flow fans 12, two coke towers 1, one axial flow fan 12 connected to each of the coke towers 1, one axial flow fan 12 connected to the feeder 71 and the vibrating screen 73 of the forced dehydration machine 7, and one axial flow fan 12 connected to the closed conveyor 8. The tail gas in the coke towers 1, the forced dehydration machines 7, and the closed conveyor 8 is gathered into the condenser 13 through the five axial flow fans 12, and the condenser 13 condenses the tail gas. Figure 1 As shown, there are five axial flow fans 12, two coke towers 1, one axial flow fan 12 connected to each of the coke towers 1, one axial flow fan 12 connected to the feeder 71 and the vibrating screen 73 of the forced dehydration machine 7, and one axial flow fan 12 connected to the closed conveyor 8. The tail gas in the coke towers 1, the forced dehydration machines 7, and the closed conveyor 8 is gathered into the condenser 13 through the five axial flow fans 12, and the condenser 13 condenses the tail gas.

[0053] In some embodiments, the exhaust gas treatment assembly further includes a liquid separator 14 and an alkaline scrubbing tower 15. The inlet of the liquid separator 14 is connected to the condenser 13, and the outlet of the liquid separator 14 is connected to the alkaline scrubbing tower 15. After condensation, the exhaust gas enters the liquid separator 14 for liquid separation, and the non-condensable gas enters the alkaline scrubbing tower 15 for alkaline scrubbing and desulfurization.

[0054] In some embodiments, the exhaust gas treatment assembly further includes an exhaust gas fan 16, which is connected to the alkaline scrubbing tower 15. The exhaust gas fan 16 extracts the exhaust gas after alkaline scrubbing in the alkaline scrubbing tower 15. Figure 1 As shown, two exhaust gas fans 16 are provided. The exhaust gas from the alkali washing tower 15 is collected in a single pipe after passing through the exhaust gas fans 16. The number of exhaust gas fans 16 can be adjusted according to the actual required air volume. In actual use, the exhaust gas extracted by the exhaust gas fans 16 needs to be connected to other equipment. The exhaust gas treatment assembly also includes a first exhaust gas valve 20, a second exhaust gas valve 21, and a combustible gas detector (not shown in the figure). One end of the first exhaust gas valve 20 is connected to the exhaust gas fan 16, and the other end is connected to an external coking furnace. One end of the second exhaust gas valve 21 is connected to the exhaust gas fan 16. The combustible gas detector is located at the outlet of the exhaust gas fan 16 and is safety interlocked with the first exhaust gas valve 20. Specifically, the outlet of the exhaust gas fan 16 is connected to the first exhaust gas valve 20 and the second exhaust gas valve 21 respectively. When the combustible gas detector detects an excessively high exhaust gas concentration, the safety interlock is triggered, the first exhaust gas valve 20 closes, and emergency venting occurs through the second exhaust gas valve 21 to ensure the safety of the coking furnace.

[0055] In some embodiments, the exhaust gas treatment assembly further includes an alkali circulation pump 17, one end of which is connected to the alkali outlet of the alkali scrubbing tower 15, and the other end is connected to the alkali inlet of the alkali scrubbing tower 15, so that the alkali can be circulated in the alkali scrubbing tower 15. In actual use, the exhaust gas treatment assembly also includes a waste alkali overflow valve 22, which is disposed between the alkali circulation pump 17 and the alkali inlet of the alkali scrubbing tower 15. When waste alkali needs to be released, the waste alkali overflow valve 22 is opened, and the waste alkali flows out through the waste alkali overflow valve 22.

[0056] Example 2

[0057] This invention provides a high-efficiency forced dehydration device for coke, combined with... Figure 2 , Figure 3 As shown, a coke processing assembly is used to dehydrate coke in at least one coke tower 1, comprising: a sealed dispensing bin 4, a first feeder 5, and two forced dewatering machines 7, wherein:

[0058] The first feeding port of the sealed distribution bin 4 is used for receiving the coke in the coke tower 1, and the first discharge port of the sealed distribution bin 4 is in full-plane sealed butt joint with the second feeding port of the first reclaimer 5. Figure 1 As shown in the figure, the coke tower 1 has two, and the first feeding port has two, and the two first feeding ports are respectively in sealed connection with the outlets of the two coke towers 1. The full-plane sealed butt joint of the first discharge port of the sealed distribution bin 4 and the second feeding port can be understood as follows: the lower part of the sealed distribution bin 4 is contracted to form a fourth discharge port, and the fourth discharge port has the same shape and cross-sectional area as the second feeding port, so that the bottom of the sealed distribution bin 4 has no dead angle, and coke is prevented from accumulating in the dead angle, so that the coke can enter the first reclaimer 5.

[0059] The first reclaimer 5 adopts a bidirectional screw reclaimer, and the bidirectional screw reclaimer is provided with two second discharge ports, and the two second discharge ports are respectively used for conveying coke to two forced dewatering machines 7. The first reclaimer 5 can be provided with two, one for use and one for standby, so as to avoid the shutdown of the device caused by the failure or maintenance of one first reclaimer 5, and improve the dewatering efficiency of the device.

[0060] The forced dewatering machine 7 includes a feeder 71 and a vibrating screen 73, the third feeding port of the feeder 71 is used for receiving the coke conveyed by the second discharge port, and the feeder 71 is provided with a third discharge port. Figure 2 As shown in the figure, the feeder 71 is provided with a feeding gear 72, the feeding gear 72 is used for conveying coke from the third feeding port to the third discharge port, the feeding gear 72 is provided with a dewatering grid 721, and the dewatering grid 721 is used for dewatering the coke in the process of conveying the coke to the vibrating screen 73, the fourth feeding port of the vibrating screen 73 is in sealed connection with the third discharge port, and the vibrating screen 73 is used for dewatering the coke by vibration and conveying the dewatered coke out through the fourth discharge port of the vibrating screen 73.

[0061] The high-efficiency coke forced dewatering device provided by the embodiment of the application, the forced dewatering machine 7 includes the feeder 71, the feeding gear 72 in the feeder 71 is provided with the dewatering grid 721, the coke is preliminarily dewatered by the dewatering grid 721 in the process of rotating and conveying by the feeding gear 72, and the coke is actively dewatered by the vibration of the vibrating screen 73, which is different from the separation by only natural sedimentation in the prior art, greatly reduces the dewatering time, and thus improves the dewatering efficiency; in addition, the first reclaimer 5 adopts a bidirectional screw reclaimer, can convey materials to the two forced dewatering machines 7 in two directions, realizes double-series coke dewatering, avoids the shutdown risk caused by the failure of a single dewatering machine, and improves the dewatering efficiency.

[0062] In some embodiments, the forced dewatering machine 7 further comprises a water storage tank 74 arranged below the feed gear 72 and the vibrating screen 73, for collecting the water removed by the feed gear 72 and the vibrating screen 73, playing a role of collection and temporary storage, avoiding the water directly falling on the ground, and the collected water is more convenient for transportation.

[0063] In some embodiments, the coke handling assembly further comprises a sealed distribution bin 4 arranged below the at least one coke tower 1, the fourth feed inlet of the sealed distribution bin 4 is in sealed connection with the outlet of the coke tower 1, and the fourth discharge outlet of the sealed distribution bin 4 is in full-plane sealed butt joint with the second feed inlet. Specifically, as shown in Figure 3 , the coke tower 1 has two, and the fourth feed inlet has two, and the two fourth feed inlets are respectively in sealed connection with the outlets of the two coke towers 1. The full-plane sealed butt joint of the fourth discharge outlet of the sealed distribution bin 4 and the second feed inlet can be understood as follows: the fourth discharge outlet is formed by the contraction below the sealed distribution bin 4, and the fourth discharge outlet and the second feed inlet have the same shape and cross-sectional area, so that the bottom of the sealed distribution bin 4 has no dead angle, preventing coke from accumulating in the dead angle, so that the coke can enter the first reclaimer 5 completely.

[0064] In some embodiments, the coke handling assembly further comprises at least one crusher 3 and at least one sealed coke chute 2, one end of the crusher 3 is connected with the outlet of the coke tower 1 through the sealed coke chute 2, and the other end of the crusher 3 is in sealed connection with the fourth feed inlet. As shown in Figure 3 , the coke tower 1 has two, and the crusher 3 and the sealed coke chute 2 also correspondingly have two, and the fourth feed inlet also has two, each of the crusher 3 has one end connected with the outlet of one coke tower 1 through one sealed coke chute 2, and the other end is in sealed connection with one fourth feed inlet. After the coke is removed by water in the coke tower 1, it is transported to the crusher 3 through the sealed coke chute 2, the crusher 3 crushes the coke to a preset size (such as 150mm-200mm) and directly enters the sealed distribution bin 4 below, and the coke of appropriate size can facilitate the subsequent forced dewatering machine 7 to dewater the coke.

[0065] In some embodiments, the first reclaimer 5 is provided with two second discharge outlets, and the coke treatment assembly further comprises two second reclaimers 6, the sixth inlets of the two second reclaimers 6 are respectively in sealing connection with the two second discharge outlets, and the sixth discharge outlet of the second reclaimer 6 is in sealing connection with the third inlet. The coke in the first reclaimer 5 enters the second reclaimer 6 through the sixth inlet, and the coke in the second reclaimer 6 enters the feeder 71 of the forced dewatering machine 7 through the sixth discharge outlet. In actual use, the second reclaimer 6 can be arranged obliquely, so that one end of the sixth discharge outlet is higher than one end of the sixth inlet. The second reclaimer 6 transports the coke to a suitable height and then enters the feeder 71 of the forced dewatering machine 7. The angle of the second reclaimer 6 can be adjusted to adapt to coke towers 1 of different heights, improve the flexibility of the device, and reasonably utilize the site of the factory. When the second reclaimer 6 is arranged obliquely, a large amount of cutting water can be removed by gravity, reducing the proportion of water in the coke, so that the coke entering the forced dewatering machine 7 has lower moisture, reducing the dewatering time of the forced dewatering machine 7, thereby improving the dewatering efficiency.

[0066] In some embodiments, the coke treatment assembly further comprises a closed conveyor 8, the fifth inlet of the closed conveyor 8 is in sealing connection with the fourth discharge outlet, and the fifth discharge outlet of the closed conveyor 8 is used to convey the coke out. In specific use, the fifth discharge outlet of the closed conveyor 8 can also be connected with an existing material transfer bin 19. The coke dewatered by the forced dewatering machine 7 is sent to the material transfer bin 19 through the closed conveyor 8. The conveying environment of the entire device is carried out in a closed environment, ensuring that it will not harm human health and the environment.

[0067] In some embodiments, the high-efficiency coke forced dewatering device further comprises a cutting water treatment assembly, as shown in Figure 1 The cutting water treatment assembly comprises a water collecting tank 9, a slurry pump 10 and a cyclone 11. The water collecting tank 9 is connected with the water outlet of the water storage tank 74 through a pipeline. One end of the slurry pump 10 is connected with the water collecting tank 9 through a pipeline, and the other end is connected with the inlet of the cyclone 11 through a pipeline. The water collecting tank 9 collects the water in the water storage tank 74. The cutting water in the water collecting tank 9 is pressurized by the slurry pump 10 and then enters the cyclone 11. The cutting water removes the coke powder in the cyclone 11. The outlet of the slurry pump 10 is also provided with a turbulence pipeline connected with the water collecting tank 9, so as to return the cutting water to the water collecting tank 9, preventing the coke powder from depositing in the water collecting tank 9.

[0068] In actual use, the outlet of the cyclone 11 can be connected to the vibrating screen 73, and the coke powder separated from the cyclone 11 can be recovered into the vibrating screen 73. The cyclone 11 can be arranged above the vibrating screen 73, and the coke powder can enter the vibrating screen 73 by gravity. In the specific use process, the high-efficiency coke forced dehydration device can also connect the cyclone 11 with the existing coke cutting water tank 18 to recover the coke cutting water after the coke powder is separated. After the coke powder is separated by the cyclone 11, the coke cutting water with a particle content of less than 55 ppmwt (ppm represents one million units of mass of a solution containing solute, and wt is weight percentage) enters the coke cutting water tank 18 for recycling.

[0069] In some embodiments, the second reclaimer 6 is provided with a water overflow hole near one end of the sixth inlet, and the water collecting tank 9 is connected to the water overflow hole. The second reclaimer 6 is arranged obliquely, and the coke cutting water separated under the action of gravity flows into the water collecting tank 9 through the water overflow hole, so that the water pre-dehydrated by the second reclaimer 6 can be collected.

[0070] In some embodiments, the high-efficiency coke forced dehydration device further comprises a tail gas treatment assembly, the tail gas treatment assembly comprising a condenser 13 and at least six axial flow fans 12, one of the axial flow fans 12 being connected to each of the coke towers 1, two of the axial flow fans 12 being connected to each of the forced dehydration machines 7, one of the axial flow fans 12 being connected to the closed conveyor 8, and the condenser 13 being connected to the at least six axial flow fans 12. Specifically, as shown in Figure 1 The axial flow fan 12 has seven, the coke tower 1 has two, the forced dehydration machine 7 has two, one of the axial flow fans 12 is connected to each of the coke towers 1, one of the axial flow fans is connected to the feeder 71 and the vibrating screen 73 of each of the forced dehydration machines 7 respectively, one of the axial flow fans is connected to the closed conveyor 8, and the tail gas in the coke tower 1, the forced dehydration machine 7 and the closed conveyor 8 is gathered into the condenser 13 through the seven axial flow fans, and the condenser 13 condenses the tail gas.

[0071] In some embodiments, the tail gas treatment assembly further comprises a liquid separation tank 14 and an alkali washing tower 15, the inlet of the liquid separation tank 14 being connected to the condenser 13, and the outlet of the liquid separation tank 14 being connected to the alkali washing tower 15. The tail gas enters the liquid separation tank 14 for liquid separation after condensation, and the non-condensable gas enters the alkali washing tower 15 for alkali washing and desulfurization.

[0072] In some embodiments, the tail gas treatment assembly further comprises a tail gas fan 16, the tail gas fan 16 being connected to the alkali washing tower 15, and the tail gas after alkali washing by the alkali washing tower 15 being extracted by the tail gas fan 16, as shown in Figure 1As shown, two tail gas fans 16 are arranged, and the tail gas in the caustic washing tower 15 is gathered into a pipeline after passing through the tail gas fans 16. Of course, the number of tail gas fans 16 can be arranged according to the actual required air volume. In actual use, the tail gas drawn out by the tail gas fan 16 needs to be connected to other equipment. The tail gas treatment assembly further comprises a first tail gas valve 20, a second tail gas valve 21, and a combustible gas detector (not shown in the figure). One end of the first tail gas valve 20 is connected with the tail gas fan 16, and the other end is connected with an external coking furnace. One end of the second tail gas valve 21 is connected with the tail gas fan 16. The combustible gas detector is arranged at the outlet of the tail gas fan 16 and is safety interlocked with the first tail gas valve 20. Specifically, after the tail gas passes through the tail gas fan 16 and is gathered into a pipeline, it is connected with the first tail gas valve 20 and the second tail gas valve 21 respectively. When the combustible gas detector detects that the concentration of the tail gas is too high, the safety interlock is triggered, the first tail gas valve 20 is closed, and the emergency venting is performed through the second tail gas valve 21, so as to ensure the safety of the coking furnace.

[0073] In some embodiments, the tail gas treatment assembly further comprises a caustic solution circulating pump 17. One end of the caustic solution circulating pump 17 is connected with the caustic solution outlet of the caustic washing tower 15, and the other end is connected with the caustic solution inlet of the caustic washing tower 15, so as to make the caustic solution circulate in the caustic washing tower 15. In actual use, the tail gas treatment assembly further comprises a waste caustic solution overflow valve 22. The waste caustic solution overflow valve 22 is arranged between the caustic solution circulating pump 17 and the caustic solution inlet of the caustic washing tower 15. When the waste caustic solution needs to be discharged, the waste caustic solution overflow valve 22 is opened, and the waste caustic solution flows out through the waste caustic solution overflow valve 22.

[0074] Embodiment three

[0075] The embodiment proposes a high-efficiency coke forced dehydration system, which comprises a coking furnace and the high-efficiency coke forced dehydration device in embodiments one and two.

[0076] The high-efficiency coke forced dehydration system proposed in the embodiment reduces the pollution caused by the high-efficiency coke forced dehydration system to the environment in the production process, because the tail gas treated by the tail gas treatment system is sent to the coking furnace for air distribution and combustion.

[0077] Embodiment four

[0078] The embodiment proposes a high-efficiency coke forced dehydration method, which is applied to the high-efficiency coke forced dehydration device in embodiments one and two, as shown in the figure, and comprises the following steps. Figure 4 As shown, the method comprises the following steps:

[0079] Step S101: A first reclaimer is used to transport the coke from a coke tower in a sealed distribution bin to a feeder of a forced dehydration machine.

[0080] Step S102: The coke in the feeder is transported to the vibrating screen by the feed gear, and the coke is dehydrated by the dehydration grid during the transportation process;

[0081] Step S103: The coke is subjected to secondary dehydration treatment by the vibration of the vibrating screen, and the coke after secondary dehydration is transported out.

[0082] The efficient coke forced dehydration method provided by the embodiment of the application dehydrates the coke by the dehydration grid during the rotation and transportation process of the feed gear, and completes the active dehydration of the coke by the vibration of the vibrating screen, which is different from the separation by natural sedimentation in the prior art, greatly reduces the dehydration time, and thus improves the dehydration efficiency.

[0083] In some embodiments, in step S101, the coke in the sealed distribution bin is transported to the feeder of the forced dehydration machine by the first reclaimer, including: sending the coke in the coke tower to the crusher through the sealed coke chute, crushing the coke by the crusher and transporting it to the sealed distribution bin, and transporting the coke in the sealed distribution bin to the feeder by the first reclaimer.

[0084] In the above steps, the first reclaimer transports the coke in the sealed distribution bin to the feeder, including: transporting the coke to the second reclaimer by the first reclaimer, and transporting the coke to the feeder by the second reclaimer.

[0085] In some embodiments, the efficient coke forced dehydration method further comprises, after step S103:

[0086] Step S104: The coke cutting water in the water collecting pool is pumped into the cyclone to remove the coke powder by the slurry pump, the spun coke powder is returned to the forced dehydration machine by the cyclone, and the coke cutting water after removing the coke powder is transported into the coke cutting water tank.

[0087] In some embodiments, the efficient coke forced dehydration method further comprises, after step S104:

[0088] Step S105: The tail gas in the coke tower, the forced dehydration machine and the closed conveyor is sequentially drawn into the condenser, the liquid separation tank and the caustic washing tower by the axial flow fan; the tail gas is condensed by the condenser, the tail gas is separated by the liquid separation tank, and the uncondensed tail gas is alkali washed and desulfurized by the caustic washing tower, and finally, the desulfurized tail gas is sent to the external coking heating furnace by the tail gas fan.

[0089] In the above description, the order of the step sequence numbers does not represent the sequence of the process, for example, the treatment of water, coke and tail gas can be performed synchronously.

[0090] In the detailed description above, various features are grouped together in single embodiments for the purpose of streamlining the disclosure. This method of disclosure, however, is not to be interpreted as reflecting a necessity that the claimed subject matter requires more features than the "one" feature per claim. On the contrary, as indicated above, aspects of the present application are directed to each individual feature, each claim being hereby expressly incorporated herein by reference in its entirety. Furthermore, the described subject matter can also be implemented in a computer program product, tangibly embodied in a machine-readable storage medium having stored, thereon, sequences of instructions defining actions that the computer will carry out when the instructions are executed by the computer. The described subject matter can also be implemented in a computer system including a computer and the computer program product.

[0091] The foregoing description includes example of one or more embodiments. Of course, not all possible combinations of components or method steps are described, but one of ordinary skill in the art having the benefit of this disclosure will recognize that many more combinations and permutations of the described elements are possible. Accordingly, the described embodiments are intended to embrace all such alterations, modifications and variations which fall within the scope of the appended claims. Further, the terms "comprises", "comprising", "includes", "including" and "contains", "containing" as used herein are intended to be interpreted as specifying the presence of stated features or components rather than precluding the presence or addition of further features or components. In addition, it is contemplated that any one or more of the following claims can be combined with any one or more of the following claims.

Claims

1. A coke forced dewatering device for dewatering coke in at least one coke drum, characterized by, The coke processing assembly and the coke cutting water processing assembly, the coke processing assembly comprising: a sealed distribution bin, at least one first reclaimer and at least one forced dewatering machine, wherein: The first inlet of the sealed distribution bin is used to receive coke in the coke tower, and the first outlet of the sealed distribution bin is in full-plane sealed butt joint with the second inlet of the first reclaimer; The second outlet of the first reclaimer is used to deliver coke to the forced dewatering machine; The forced dewatering machine comprises a feeder and a vibrating screen, the third inlet of the feeder is used to receive coke delivered by the second outlet, the feeder is provided with a third outlet; a feeding gear is arranged in the feeder, the feeding gear is used to deliver coke from the third inlet to the third outlet, the feeding gear is provided with a dewatering grid for dewatering coke during the delivery of coke to the vibrating screen; the fourth inlet of the vibrating screen is in sealed connection with the third outlet, the vibrating screen is used to dewater coke by vibration, and the dewatered coke is delivered out through the fourth outlet of the vibrating screen; the forced dewatering machine further comprises a water storage tank arranged below the feeding gear and the vibrating screen; The coke processing assembly further comprises at least one second reclaimer, the sixth inlet of the second reclaimer is in sealed connection with the second outlet, and the sixth outlet of the second reclaimer is in sealed connection with the third inlet; the coke cutting water processing assembly comprises a water collecting tank, a slurry pump and a cyclone separator, the water collecting tank is connected with the water outlet of the water storage tank through a pipeline, one end of the slurry pump is connected with the water collecting tank through a pipeline, and the other end is connected with the inlet of the cyclone separator through a pipeline; The outlet of the slurry pump is further provided with a turbulence pipeline connected with the water collecting tank, so as to return the coke cutting water to the water collecting tank to prevent coke powder from depositing in the water collecting tank; The outlet of the cyclone separator is connected with the vibrating screen, and the cyclone separator is arranged above the vibrating screen, so that coke powder enters the vibrating screen by gravity; The second reclaimer is arranged in an inclined manner, so that one end of the sixth outlet is higher than one end of the sixth inlet; The second reclaimer is provided with a water overflow hole near one end of the sixth inlet, and the water collecting tank is connected with the water overflow hole, so that the dewatered coke cutting water flows to the water collecting tank under the action of gravity.

2. The coke forced dewatering device as claimed in claim 1, wherein The coke processing assembly further comprises at least one crusher and at least one sealed coke chute, one end of the crusher is connected with the outlet of the coke tower through the sealed coke chute, and the other end of the crusher is in sealed connection with the first inlet.

3. The coke forced dewatering device as claimed in claim 2, wherein The coke processing assembly further comprises a sealed conveyor, the fifth inlet of the sealed conveyor is in sealed connection with the fourth outlet, and the fifth outlet of the sealed conveyor is used to deliver coke out.

4. The coke forced dewatering device as claimed in claim 1, wherein The coke processing assembly comprises two forced dewatering machines and two second reclaimers, and the first reclaimer is a bidirectional screw reclaimer; the bidirectional screw reclaimer is provided with two second outlets, the two second outlets are respectively in sealed connection with the sixth inlets of the two second reclaimers; the sixth outlets of the two second reclaimers are respectively connected with the two third inlets.

5. The coke forced dewatering device as claimed in claim 3, wherein It also includes an exhaust gas treatment assembly, which includes a condenser and at least four axial flow fans. Each of the coke towers is connected to one of the axial flow fans, the feeder and the vibrating screen are each connected to an axial flow fan, the closed conveyor is connected to one of the axial flow fans, and the condenser is connected to the at least four axial flow fans.

6. The coke forced dewatering device as claimed in claim 5, wherein The exhaust gas treatment assembly also includes a separator and an alkaline scrubbing tower. The inlet of the separator is connected to the condenser, and the outlet of the separator is connected to the alkaline scrubbing tower.

7. The coke forced dewatering device as claimed in claim 6, wherein The exhaust gas treatment assembly also includes an alkaline solution circulation pump, one end of which is connected to the alkaline solution outlet of the alkaline scrubbing tower, and the other end is connected to the alkaline solution inlet of the alkaline scrubbing tower, so that the alkaline solution can be circulated in the alkaline scrubbing tower.

8. The coke forced dewatering device as claimed in claim 7, wherein The exhaust gas treatment assembly also includes a waste alkali overflow valve, which is located between the alkali circulation pump and the alkali inlet of the alkali washing tower.

9. The coke forced dewatering device as claimed in claim 8, wherein The exhaust gas treatment assembly also includes an exhaust gas fan, which is connected to the alkaline scrubbing tower.

10. The coke forced dewatering device as claimed in claim 9, wherein The exhaust gas treatment assembly further includes a first exhaust gas valve, a second exhaust gas valve, and a combustible gas detector. One end of the first exhaust gas valve is connected to the exhaust gas fan, and the other end is connected to an external coking furnace. One end of the second exhaust gas valve is connected to the exhaust gas fan. The combustible gas detector is located at the outlet of the exhaust gas fan and is interlocked with the first exhaust gas valve for safety.

11. A coke forced dewatering system characterized by, It includes a coking furnace and a coke forced dehydration device as described in any one of claims 1-10.

12. A method of forcibly dehydrating coke, using the coke forcibly dehydrating apparatus according to any one of claims 1 to 10, characterized by, include: The first feeder transports the coke from the coke tower in the sealed distribution bin to the feeder of the forced dewatering machine; The coke in the feeder is conveyed to the vibrating screen by the feeding gear, and the coke is dehydrated by the dewatering grid during the conveying process; The coke undergoes secondary dehydration through the vibration of a vibrating screen, and the dehydrated coke is then transported out.

13. The coke forced dewatering method as claimed in claim 12, characterized by, The process of conveying coke from the coke tower in the sealed distribution bin to the feeder of the forced dewatering machine by the first reclaimer includes: feeding coke from the coke tower into the crusher through a sealed coke chute, crushing the coke through the crusher and conveying it to the sealed distribution bin, and then conveying the coke from the sealed distribution bin to the feeder by the first reclaimer.

14. The coke forced dewatering method as claimed in claim 13, characterized by, The first reclaimer conveys the coke from the sealed distribution bin to the feeder, including: conveying the coke to the second reclaimer via the first reclaimer, and then having the second reclaimer convey the coke to the feeder.

15. The coke forced dewatering method as claimed in claim 14, characterized by, Also includes: The coke-cutting water in the collection tank is pumped by the slurry pump into the cyclone separator to remove coke powder. The cyclone separator returns the cyclone powder to the forced dewatering machine and the coke-cutting water after removing coke powder is transported into the coke-cutting water tank.

16. The coke forced dewatering method as claimed in claim 15, characterized by, Also includes: The exhaust gas from the coke tower, forced dehydrator and closed conveyor is sequentially drawn into the condenser, the separator and the alkaline washing tower by the axial flow fan. The tail gas is condensed by a condenser, separated by a separator, and the uncondensed tail gas is desulfurized by an alkaline scrubbing tower. Finally, the desulfurized tail gas is sent to the external coking furnace by a tail gas blower.

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