Coke powder receiving device, coke drum system and method for receiving and removing coke powder through coke drum system

Abstract

The present invention relates to a coke powder receiving device, a coke can system, and a method for receiving and removing coke powder through a coke can system. The coke powder receiving device comprises: a box body and a receiving container movably arranged below a coke receiving port in the box body; the box body is provided with at least one box body door, and when the coke powder receiving device is in a non-coke powder removal period, the box body door is in a closed state, so that the box body can receive coke powder in the coke flue gas from the coke can through the receiving container in a closed state; and when the box body door is in an open state, the receiving container can be moved out of the box body to remove the coke powder in the receiving container. By using the coke powder receiving device and the coke can system according to the present invention, waterless spraying can be achieved, effectively preventing water from corroding the inner wall of the container, eliminating the hidden safety hazards of on-site personnel caused by water vapor diffusion, and protecting personnel from the risk of exposure to hot coke.

Description

Technical Field

[0001] The invention relates to the technical field of cracking furnaces, and in particular to a coke powder receiving device, a coke burning tank system, and a method for receiving and removing coke powder through the coke burning tank system. Background Art

[0002] During normal operation of a steam cracking furnace, coke is formed in the radiant tubes. In order to improve the performance of the cracking furnace and extend the operating cycle, it is usually necessary to remove the coke regularly through an operation called steam air coking. A large amount of coke flue gas (including steam and small-particle coke powder, etc.) is generated during the coke cleaning process. Most of the existing cracking furnace coke cleaning tanks use cyclone separation technology. The coke is sent from the radiant tube to the coke tank, and after cyclone separation, the heavy coke is discharged from the bottom of the coke tank into the coke powder receiving device, and the coke-free top returns to the furnace. Over time, coke powder will continue to accumulate in the coke powder receiving device, so the coke powder in the coke powder receiving device needs to be regularly removed. However, removing coke powder from the coke powder receiving device is challenging because the hot coke needs to be properly managed to avoid harm to operators and adverse effects on the environment during the removal of coke powder.

[0003] Most of the traditional coke powder receiving equipment known in the prior art adopt an open water spray coke receiving method or an underground water pit water seal coke receiving method. However, the water spray coke receiving method is prone to corroding the inner wall of the receiving container, causing leakage, and the diffusion of water vapor will also bring safety hazards to on-site operators. This open coke powder receiving equipment puts operators at risk of exposure to hot coke. In addition, although the underground water pit water seal coke receiving method solves the problems of water vapor diffusion and inner wall corrosion in the water spray coke receiving method, this method requires operators to enter a confined space to perform coke cleaning operations, which also poses a large operational safety hazard. Summary of the invention

[0004] The present invention is proposed based on such background, and aims to provide an improved coke powder receiving device and coke drum system to overcome the above-mentioned and / or other problems existing in the prior art.

[0005] According to a first aspect of the present invention, it relates to a coke powder receiving device, comprising: a box body, a coke receiving opening is provided on the top of the box body, and the coke receiving opening is intended to connect the coke inverting opening of the coke tank with the interior of the box body; and a receiving container movably arranged below the coke receiving opening in the box body; wherein the box body is provided with at least one box body door, and when the coke powder receiving device is in a non-coke powder clearing period, the box body door is in a closed state, so that the box body can receive coke powder in the coke flue gas from the coke tank through the receiving container in a closed state; and when the box body door is in an open state, the receiving container can be moved out of the box body to clear the coke powder in the receiving container.

[0006] As an embodiment, a filter cloth curtain is arranged in the box body around the coke receiving port and the receiving container to provide a coke powder receiving space and a steam condensation space separated from each other; wherein the filter cloth curtain is configured so that the coke powder in the burnt flue gas can be intercepted by the filter cloth curtain in the coke powder receiving space and fall into the receiving container, while the steam in the burnt flue gas can pass through the filter cloth curtain into the steam condensation space to condense into condensed water and fall to the bottom of the box body.

[0007] As an embodiment, a clamping structure is provided on the inner side wall of the top of the box body around the coke receiving port, for tightly clamping the filter cloth curtain.

[0008] As an embodiment, the clamping structure includes two opposite circumferential clamping parts, the two circumferential clamping parts are spaced apart from each other to define an annular gap, and the filter cloth curtain is embedded in the annular gap and is fixed by a plurality of threaded fasteners.

[0009] As an embodiment, a drain port is provided at the bottom of one side of the box body to discharge condensed water accumulated at the bottom of the box body; and / or a cleaning port is provided at the bottom of the other side of the box body to clean residual debris in the box body.

[0010] As an embodiment, the bottom surface of the sewage outlet and / or the bottom surface of the cleaning outlet is flush with the bottom surface of the box body.

[0011] As an embodiment, a plurality of supporting legs are disposed at the bottom of the receiving container, and the height of the plurality of supporting legs is designed to be higher than the threshold height of the box body.

[0012] As an embodiment, a plurality of steps spaced apart from each other in the vertical direction are provided on at least one side of the box body to facilitate an operator to approach the position of the focal point along the plurality of steps; a safety handrail is also provided on at least one side of the box body and / or on the top of the box body for the operator to grasp during installation and maintenance.

[0013] As an embodiment, an electrostatic grounding plate is provided at the bottom of at least one side of the box.

[0014] According to a second aspect of the present invention, it relates to a coke pot system, which comprises a coke pot and the coke powder receiving device as described above.

[0015] As an embodiment, the coke pouring port of the coke burning tank and the coke receiving port of the coke powder receiving device are fixedly connected via a metal hose.

[0016] According to a third aspect of the present invention, it relates to a method for receiving and removing coke powder by the coke drum system as described above, the method comprising the following steps:

[0017] The coke receiving port of the coke powder receiving device is fixedly connected with the coke pouring port of the coke burning tank;

[0018] During steam air charring, placing a receiving container in the box below the char receiving opening, and closing the box door;

[0019] Open the valve above the coke pouring port so that the coke powder in the coking smoke can fall from the coke pouring port to the receiving container through the coke receiving port;

[0020] When the steam-air charring is finished, close the valve above the char opening;

[0021] When the temperature of the box is lower than a predetermined threshold, opening the box door and removing the receiving container; and

[0022] After processing the coke powder in the receiving container, the receiving container is moved back into the box body, and the coke cleaning is completed.

[0023] As an embodiment, the method further comprises: during the steam-air charring, opening a valve of a sewage outlet so that condensed water formed by steam in the charring flue gas accumulated at the bottom of the box can be discharged to a sewage pool.

[0024] As an embodiment, the predetermined threshold is 40° C., and the method further comprises measuring the temperature of the box by means of a temperature sensing device.

[0025] The use of the coke powder receiving equipment and the coke burning tank system according to the present invention can achieve waterless spraying, effectively preventing the corrosion of the inner wall of the receiving container by the spraying water, and eliminating the work safety hazards to on-site personnel caused by water vapor diffusing in the air when cleaning the cracking furnace; since the entire coke powder receiving equipment is in a closed state during operation (such as during the reception of coke powder), the risk of exposure of operators to hot coke is avoided, so it is safer and cleaner than traditional open water injection coke receiving equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other features and advantages of the present invention will become more readily understood through the following description with reference to the accompanying drawings, in which:

[0027] Figure 1 is a front view of a coke powder receiving device according to an embodiment of the present invention;

[0028] Figure 2 is a side view of a coke powder receiving device according to an embodiment of the present invention;

[0029] Figure 3 is a top view of a coke powder receiving device according to an embodiment of the present invention; and

[0030] Figure 4 The present invention is a flowchart of a method for receiving and removing coke powder by a coke drum system according to an embodiment of the present invention.

[0031] All the drawings are only schematic and not necessarily drawn to scale, and they only show those parts necessary for explaining the present invention, and other parts are omitted or only mentioned. That is, in addition to the parts shown in the drawings, the present invention may also include other parts. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the present invention may be implemented without some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, it is contemplated that the present invention may be implemented with any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless explicitly stated in the claims. The terms "including" and "having" are used to express an open-ended inclusion meaning and mean that additional elements / components may exist in addition to the listed elements / components.

[0033] As mentioned in the background technology, the water-spraying coke powder receiving equipment needs to spray water, which is easy to corrode the inner wall of the receiving container, thereby causing leakage, and due to the open structural design, the operator is exposed to the risk of hot coke, and the underground water pit water seal coke powder receiving equipment requires the operator to enter a confined space to perform coke cleaning operations, which also poses a safety hazard to the operation. To this end, the present invention proposes an improved coke powder receiving equipment, which reduces the risk of hot coke exposure for operators and effectively protects the on-site working environment.

[0034] Figures 1 to 3 FIG. 2 shows a coke powder receiving device according to an exemplary embodiment of the present invention. Specifically, see Figure 1 The coke powder receiving device 1 includes a housing 11 and a movable receiving container 12 ( Figure 1 Indicated by dot-dash lines in the figure). A coke receiving port 111 is provided on the top of the box body 11, and a receiving container 12 is provided below the coke receiving port 111. The coke receiving port 111 is intended to be connected to the coke pouring port 2 of the coke burning tank (not shown in the figure) through, for example, a metal hose (such as a steel wire hose), so as to connect the coke pouring port 2 of the coke burning tank with the interior of the box body 11, thereby allowing coke powder to be received from the coke pouring port 2 into the box body 11. For example, the box body 11 can be fixed to the factory building by anchor bolts 13, and the receiving container 12 can be moved into or out of the box body 11 by a carrying device such as a forklift. In order to strengthen the structural strength of the box body 11, a reinforcing structure 16 such as a reinforcing angle iron (see Figure 2 ).

[0035] Different from the open coke powder receiving equipment in the prior art, the coke powder receiving equipment in the present invention is in a closed state during the non-coke powder removal period (i.e., the time period when coke powder does not need to be removed, such as the period of steam air burning and receiving coke powder and the period when the entire equipment is shut down), so as to prevent water vapor from diffusing into the air, reduce the safety hazards of the workers, and protect the workers from the risk of exposure to hot coke. See especially Figure 1, at least one, for example two, box doors 112 are provided on the box body 11, which can rotate around a pivot shaft 113 provided on the box door 112 relative to other fixed parts of the box body 11. When the box door 112 is in a closed state, the entire box body 11 is a closed structure, so that the box body 11 can receive high-temperature coke powder from the coke tank in a closed state, which greatly reduces the risk of hot coke exposure for workers. When the coke powder in the receiving container 12 accumulates to a certain extent and needs to be removed, the box door 112 can be opened when the corresponding conditions are met (for example, the coke powder temperature is reduced to a specific temperature threshold), and the receiving container 12 can be moved out of the box body 11 by, for example, a forklift, thereby removing the coke powder in the receiving container that has been cooled to a lower temperature. It can be seen that the coke powder receiving device of the present invention is safer and cleaner than the traditional open coke powder receiving device.

[0036] Continue to see Figure 1 , a filter cloth curtain 13 (which should be made of high temperature resistant, such as flame retardant material resistant to high temperature above 400°C) can be arranged around the coke receiving port 111 and the receiving container 12 in the box 11, which can provide a coke powder receiving space and a steam condensation space separated from each other, and the filter cloth curtain is configured so that the coke powder in the coke flue gas flowing from the coke receiving port 111 into the box 11 can be filtered by the filter cloth curtain 13 and intercepted in the coke powder receiving space and fall into the receiving container 12, while the steam in the coke flue gas can pass through the filter cloth curtain 13 into the steam condensation space and condense into condensed water, falling to the bottom of the box 11, and the condensed water is retained at the bottom of the box through the threshold of the box 11. In this way, the coke flue gas in the coke tank can be safely separated.

[0037] The bottom of the receiving container 12 is provided with a plurality of supporting legs 121, and the height of the plurality of supporting legs 121 is designed to be higher than the height of the threshold of the box body 11. Such a height design of the supporting legs 121 is advantageous because, on the one hand, sufficient space is provided between the bottom of the receiving container 12 and the threshold of the box body 11 to allow, for example, a forklift arm to extend therein, so as to facilitate the transfer of the receiving container 12 by a forklift, etc., and on the other hand, the bottom of the receiving container 12 is prevented from contacting with the condensed water accumulated at the bottom of the box body 11, and the receiving container 12 is prevented from occupying the condensed water accumulation space.

[0038] In order to ensure that the filter cloth curtain 13 can effectively intercept the coke particles, the filter cloth curtain 13 needs to be tightly surrounded at the receiving opening of the receiving container 12 in the circumferential direction to provide a relatively closed coke powder receiving space between the coke receiving port 111 and the receiving opening of the receiving container 12 to avoid providing any leakage gaps. Figure 1In the specific embodiment shown in , a clamping structure 14 is provided on the inner side wall of the top of the box body 11 around the coke receiving port 111, for tightly clamping the filter cloth curtain 13. The clamping structure includes two circumferential clamping parts (such as in the form of opposing clamping plates), and the two circumferential clamping parts are spaced apart from each other to define an annular gap, and the filter cloth curtain 13 is clamped in the annular gap and fixed by a plurality of threaded fasteners. For example, a threaded fastener is used to fix the filter cloth curtain 13 at intervals in the circumferential direction, so that the filter cloth curtain 13 can be tightly overlapped at the edge of the receiving opening of the receiving container 12, thereby providing a relatively closed coke powder receiving chamber 15 (see Figure 1 The "relatively airtight" here is not intended to limit the absolute airtightness of the receiving chamber, but to emphasize the use of the filter cloth curtain 13 to achieve as seamless overlap as possible to obtain effective separation of the burnt smoke.

[0039] As mentioned above, the steam passing through the filter cloth curtain 13 can condense to form condensed water, which will fall into the box space outside the receiving container 12 and accumulate at the bottom of the box. In order to facilitate the discharge of the condensed water accumulated at the bottom of the box, a side of the box 11 (such as Figure 1 The bottom and especially the middle position (see Figure 2 ) can be provided with a drain port 114. The drain port 114 can be connected to a valve and a dehydration hose. During the steam air burning period, the valve of the drain port 114 can be in an open state, and condensed water can be discharged from the drain port 114 to the sewage pool through the dehydration hose. More advantageously, the other side of the box body 11 (such as Figure 2 As shown in the figure, at the bottom of the rear side of the box, especially the middle position (see Figure 3 ) is provided at the drain outlet 114 to facilitate cleaning of any residual debris in the box body 11. In order to facilitate cleaning of the residue at the drain outlet 114 / cleaning outlet 115 to avoid any pipe blockage, the bottom surface of the drain outlet 114 and / or the bottom surface of the cleaning outlet 115 is designed to be flush with the bottom surface of the box body 11.

[0040] According to the coke powder receiving device of the present invention, the box body 11 can be optionally always in a fixed state, and the coke receiving port 111 at the top of the box body 11 is always connected to the coke inverting port 2 of the coke burning tank (even during the operation of the cracking furnace or during the coking period), except for the normal maintenance or inspection of the connection between the coke receiving port 111 and the coke inverting port 2 during a specific maintenance period. This makes it possible to avoid pipeline stress caused by frequent disassembly, effectively protect the box body and the connecting pipeline, and also simplify the operation process of the coke powder receiving device.

[0041] In order to facilitate the operator to connect the coke receiving port 111 and the coke inverting port 2 and to perform daily maintenance on the connection between the two, a plurality of stepping steps 116 spaced apart from each other in the vertical direction may be provided on at least one side of the box body 11 (e.g., Figure 2 In the figure, there are a plurality of steps (shown by thin dotted lines) on the invisible opposite side, i.e., the right side of the box body, to facilitate the operator to reach the top of the box body 11 along the plurality of steps 116.

[0042] In order to ensure the safety of the operator, a step 116 is provided on the box 11 (for example, at the top of the box and at the right side near the top, see Figure 1 ) is also provided with a safety handrail 117 for the operator to grasp during installation and maintenance. In addition, it is also possible to Figure 3 As shown in FIG, an electrostatic grounding plate 118 is provided at the lower rear right side of the box body to conduct static electricity generated during the use of the equipment to prevent explosion and other hazards caused by static electricity accumulation.

[0043] Next, see Figure 4 The following describes an operation method for receiving and removing coke powder using a coke pot system (which includes a coke pot and a coke powder receiving device) according to the present invention. The method may mainly include the following operation steps:

[0044] The coke receiving port 111 of the coke powder receiving device 1 is fixedly connected to the coke pouring port 2 of the coke burning tank, for example, by using a metal hose (such as a steel wire hose);

[0045] During steam air charring, the receiving container 12 is placed at a position corresponding to the char receiving opening 111 in the box 11 and the box door 112 is closed;

[0046] Open the valve above the coke pouring port 2 so that the coke powder can fall from the coke pouring port 2 into the receiving container 12 through the coke receiving port 111;

[0047] Optionally, during steam air charring, the valve of the drain port 114 is opened so that the condensed water accumulated at the bottom of the tank 11 can be discharged to the sewage tank;

[0048] When the steam-air charring is finished, close the valve above the char opening 2;

[0049] After a period of natural cooling, the temperature of the box 11 may be measured, for example, by means of a temperature sensing device (such as a temperature measuring gun), and when the measured temperature of the box 11 is lower than a predetermined threshold (such as 40° C.), the box door 112 is opened, and the receiving container 12 is removed by, for example, a forklift; and

[0050] After the coke powder in the receiving container 12 is processed, the receiving container 12 can be moved back into the box body 11 by, for example, a forklift, and the coke cleaning is completed at this time.

[0051] As can be seen from the above, the coke powder receiving equipment according to the present invention adopts a fully enclosed receiving system, which can achieve waterless spraying, effectively prevent the corrosion of the inner wall of the container by the spraying water, eliminate the work safety hazards caused by water vapor diffusing in the air when cleaning the cracking furnace, and avoid the risk of exposure of operators to hot coke. Therefore, it is safer and cleaner than traditional open water injection coke receiving equipment.

[0052] It should be noted that the embodiments described above are only to be considered as exemplary, and the present invention is not limited to these embodiments. By considering the contents of this specification, those skilled in the art can make various changes and modifications without departing from the scope or spirit of the present invention. The true scope of the present invention is limited by the appended claims and equivalents.

Claims

1. A coke powder receiving device, comprising: A box body (11), wherein a coke receiving opening (111) is provided at the top of the box body (11), wherein the coke receiving opening (111) is intended to connect the coke pouring opening (2) of the coke burning tank with the interior of the box body (11); and a receiving container (12) movably arranged below the coke receiving opening (111) in the box body (11); The box body (11) is provided with at least one box body door (112); when the coke powder receiving device is in a non-coke powder removal period, the box body door is in a closed state, so that the box body (11) can receive coke powder in the coking flue gas from the coke burning tank through the receiving container (12) in a closed state; and when the box body door (112) is in an open state, the receiving container (12) can be removed from the box body (11) to remove the coke powder in the receiving container (12); and Wherein, a filter cloth curtain (13) is arranged around the coke receiving port (111) and the receiving container (12) in the box body (11) to provide a coke powder receiving space and a steam condensation space separated from each other; wherein, the filter cloth curtain is configured so that coke powder in the coke flue gas can be intercepted by the filter cloth curtain (13) in the coke powder receiving space and fall into the receiving container (12), while the steam in the coke flue gas can pass through the filter cloth curtain (13) into the steam condensation space to condense into condensed water and fall into the bottom of the box body (11).

2. The coke powder receiving device according to claim 1, wherein: A clamping structure (14) is provided on the inner side wall of the top of the box body (11) around the coke receiving port (111) and is used to tightly clamp the filter cloth curtain (13).

3. The coke powder receiving device according to claim 2, wherein: The clamping structure (14) comprises two circumferential clamping parts, which are spaced apart from each other to define an annular gap, and the filter cloth curtain (13) is embedded in the annular gap and is fixed by a plurality of threaded fasteners.

4. The coke powder receiving device according to any one of claims 1 to 3, wherein: A drain port (114) is provided at the bottom of one side of the box body (11) to facilitate the discharge of condensed water accumulated at the bottom of the box body; and / or a cleaning port (115) is provided at the bottom of the other side of the box body (11) to facilitate the cleaning of residual debris in the box body.

5. The coke powder receiving device according to claim 4, wherein: The bottom surface of the sewage outlet (114) and / or the bottom surface of the cleaning outlet (115) are flush with the bottom surface of the box body (11).

6. The coke powder receiving device according to any one of claims 1 to 3, wherein: The bottom of the receiving container (12) is provided with a plurality of supporting legs (121), and the height of the plurality of supporting legs is designed to be higher than the threshold height of the box body (11).

7. The coke powder receiving device according to any one of claims 1 to 3, wherein: A plurality of steps (116) spaced apart from each other in the vertical direction are provided on at least one side of the box (11) to facilitate operators to approach the position of the focal point along the plurality of steps (116); and a safety handrail (117) for operators to grasp during installation and maintenance is also provided on at least one side of the box (11) and / or on the top of the box (11).

8. The coke powder receiving device according to any one of claims 1 to 3, wherein: An electrostatic grounding plate (118) is provided at the bottom of at least one side of the box (11).

9. A coke pot system, comprising a coke pot and a coke powder receiving device according to any one of claims 1 to 8.

10. The char can system according to claim 9, wherein: The coke pouring port (2) of the coke burning tank and the coke receiving port (111) of the coke powder receiving device (1) are fixedly connected via a metal hose.

11. A method for receiving and removing coke powder by the coke drum system according to claim 9 or 10, the method comprising the following steps: The coke receiving port (111) of the coke powder receiving device is fixedly connected to the coke pouring port (2) of the coke burning tank; During steam air charring, a receiving container (12) is placed in the box (11) below the char receiving opening (111), and the box door (112) is closed; Opening a valve above the coke pouring port (2) so that coke powder in the coking smoke can fall from the coke pouring port (2) through the coke receiving port (111) into the receiving container (12); When the steam-air charring is completed, close the valve above the char opening (2); When the temperature of the cabinet (11) is lower than a predetermined threshold, opening the cabinet door (112) and removing the receiving container (12); and After the coke powder in the receiving container (12) is processed, the receiving container (12) is moved back into the housing (11), and the coke cleaning is completed.

12. The method according to claim 11, wherein: The method further comprises: during the steam air charring, opening the valve of the sewage outlet (114) so ​​that the condensed water formed by the steam in the charring flue gas accumulated at the bottom of the box can be discharged to the sewage pool.

13. The method according to claim 11, wherein: The predetermined threshold is 40° C., and the method further comprises measuring the temperature of the box (11) by means of a temperature sensing device.

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