Square combined dehydration tank

Abstract

A square combined dehydration tank relates to the technical field of delayed coking dehydration, and comprises a dehydration tank frame body, straight wall plates, a top cover and a lower cone, the dehydration tank frame body is composed of a plurality of latticed frames, each latticed frame is formed by connecting a plurality of prefabricated frame parts, and the lower cone is provided with a lower cone. The frame part comprises a vertically-arranged square stand column, an upper cross beam and a middle cross beam, the upper cross beam and the middle cross beam are perpendicularly connected with the square stand column, a lower cone is arranged below the latticed frame, the lower cone is of a square-cone-shaped structure and is provided with a large end and a small end, the large end of the lower cone is connected to the middle cross beam of the latticed frame, and a discharging opening is formed in the small end of the lower cone; square stand columns on the outer side of the periphery of the dehydration tank frame body are connected with straight wall plates, and the straight wall plates are provided with feed ports and overflow ports; a top cover is arranged at the top of the dehydration tank frame body, and a top water inlet is formed in the top cover; and the dehydration tank frame body, the straight wall plate, the top cover and the lower cone form a dehydration tank internal closed space. According to the utility model, the dehydration and coke discharge efficiency can be effectively improved, and the whole coke conveying process is closed, environment-friendly and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of delayed coking dehydration, in particular to a square combined dehydration tank. Background Art

[0002] In traditional delayed coking technology, the coke drum enters an open coke pond through a coke chute. During the decoking process, a large amount of steam overflows from the coke outlet and the coke pond. This steam contains dust, sulfides, and volatile organic compounds. The unorganized emission of these gases pollutes the atmosphere. At the same time, the coke is dehydrated by the slope of the coke pond bottom and by being stacked for a long time. However, this dehydration method is inefficient. The prolonged dehydration in the coke pond causes the surface water to evaporate and fly in the wind, further polluting the environment. The dehydrated coke needs to be grabbed by a grab crane, which also causes the problem of coke dust flying and polluting the environment.

[0003] The newly constructed delayed coking unit utilizes closed-tank decoking technology. This technology elevates the coke drum and places a dehydration tank beneath it to hold a drum of coke. Exhaust gases are collected through a top exhaust port. After coke cutting, the dehydration tank begins dehydration, completing cooling, dehydration, and transfer operations within a single coke-making cycle. The dehydration tank in this technology is circular or polygonal and is placed within the coke drum frame, below the drum. Feeding occurs at the center of the upper section, while the lower tapered section connects to a discharge port. This dehydration tank must be placed on a coke drum frame platform, increasing the overall height of the unit and the complexity and cost of civil engineering design. Furthermore, since the dehydration tank has only a single discharge port, discharge time is also increased. Furthermore, due to its large size, the dehydration tank can only be manufactured on-site by assembling individual pieces, resulting in a lengthy manufacturing process. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a square combined dehydration tank, which can effectively improve the dehydration and coke discharge efficiency, and the entire coke transportation process is closed, environmentally friendly and efficient.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a square combined dehydration tank, comprising a dehydration tank frame, a straight wall plate, a top cover and a lower cone, wherein the dehydration tank frame is composed of a plurality of grid-like frames, each of the grid-like frames is composed of a plurality of prefabricated frame components, the frame components include vertically arranged square columns and upper cross beams and middle cross beams respectively connected to the square columns vertically, a lower cone is provided under the grid frame, the lower cone is a square cone structure, the lower cone has a large end and a small end, the large end of the lower cone is connected to the middle cross beam of the grid frame, and the small end is provided with a discharge port; the square columns on the outside of the dehydration tank frame are connected to the straight wall plates, and the straight wall plates are provided with a feed port and an overflow port; the top of the dehydration tank frame is provided with an adaptive top cover, and the top cover is provided with a top water inlet; the dehydration tank frame, the straight wall plates, the top cover and the lower cone form a closed space inside the dehydration tank for storing and dehydrating petroleum coke.

[0006] The beneficial effects are as follows: petroleum coke enters the combined tank directly through a pipe connected to the feed port, making the entire process environmentally friendly and efficient, while also saving equipment and petroleum coke loss during intermediate handling. Each grid-like frame is equipped with a square-conical structure with multiple outlets, increasing the number of outlets and allowing multiple conveying equipment to operate simultaneously, effectively reducing coke transportation time. The combined dehydration tank is supported on the foundation surface by square columns, which does not affect the foundation height of the coke drum frame. Furthermore, the increased horizontal area effectively reduces the overall height, lowering the petroleum coke accumulation height and shortening the coke-water separation time. The enclosed space within the dehydration tank prevents the leakage of coke fines during processing, thereby reducing environmental pollution.

[0007] The roof is formed by connecting a plurality of prefabricated roof units, and the straight wall panel is formed by connecting a plurality of prefabricated straight wall panel units.

[0008] The beneficial effects are: the combined tank adopts a modular design, can be prefabricated in advance, and assembled on site, with less on-site workload and shortened manufacturing cycle.

[0009] The cone section of the lower cone is made of composite steel plate or stainless steel plate.

[0010] The beneficial effect is that the cone section of the lower cone is made of composite steel plate or stainless steel plate, which makes it not easy to rust and can effectively prevent the adhesion of solid petroleum coke.

[0011] A material leveling device is provided inside the dehydration tank for leveling the petroleum coke inside the dehydration tank.

[0012] The beneficial effect is that a material leveling device is provided inside the combination tank, which can evenly level the petroleum coke inside the combination tank, thereby improving the space utilization rate inside the dehydration tank and avoiding the accumulation of petroleum coke below the feed port.

[0013] A water filtering pipe is provided on the lower cone, and the end of the water filtering pipe is connected to the water filtering outlet.

[0014] The top cover is provided with a breathing valve port and an emergency pressure relief valve port, which are used to install corresponding valves to maintain the pressure balance inside and outside the equipment.

[0015] The beneficial effect is: in order to maintain the pressure balance inside and outside the equipment, the top of the combination tank is provided with corresponding breathing valve ports and emergency pressure relief valve ports, which are convenient for installing corresponding valves. The top of the combination tank is provided with corresponding breathing valve ports and emergency pressure relief valve ports, which are convenient for installing corresponding valves to maintain the pressure balance inside and outside the equipment.

[0016] The top cover is provided with an exhaust port for discharging internal exhaust gas into an exhaust gas treatment pipeline.

[0017] The beneficial effect is that the top cover of the combined tank is equipped with an exhaust port, which introduces the internal exhaust gas into the exhaust gas treatment pipeline for treatment.

[0018] The top cover is provided with a square observation window and a level meter port for observing the internal conditions of the tank body.

[0019] The beneficial effect is that the top cover of the combined dehydration tank is equipped with a square observation window and a level meter port. The square observation window is designed to observe the situation inside the tank. In addition, the level meter port can be installed with a level meter to monitor the height of the petroleum coke entering the combined tank in real time.

[0020] A heating pipe is laid around the outer peripheral wall of the lower cone.

[0021] The beneficial effect is that a heating pipe is provided on the outside of the lower cone to prevent the internal petroleum coke from freezing in areas with low ambient temperatures.

[0022] A vibrator and a quick-open sampling port are provided on the outside of the lower cone.

[0023] The beneficial effects are: a vibrator is designed on the outside of the lower cone to prevent the petroleum coke from sticking. In addition, a quick-opening sampling port is also set on the outside of the lower cone to facilitate rapid sampling and detection of the moisture content of the petroleum coke. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the present utility model.

[0025] Figure 2 It is a top view of the utility model.

[0026] Figure 3 It is a side view of the present utility model.

[0027] Markings in the figure: 1. Square column, 2. Upper crossbeam, 3. Straight wall plate, 4. Feed inlet, 5. Middle crossbeam, 6. Lower cone, 7. Water filter pipe, 8. Water filter outlet, 9. Feed outlet, 10. Overflow port, 11. Top cover, 12. Breathing valve port, 13. Emergency pressure relief valve port, 14. Exhaust port, 15. Observation window, 16. Level meter port, 17. Top water inlet, 18. Heating pipe, 19. Vibrator, 20. Quick-open sampling port. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification so as to facilitate understanding and reading by those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes shall still fall within the scope of the technical contents disclosed in this utility model without affecting the efficacy and objectives that can be achieved by the present utility model.

[0030] At the same time, it should be noted that, unless otherwise specified, "several" means two or more; the directions or positional relationships indicated by terms such as "upper," "lower," "left," "right," "front end," and "rear end" are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be considered within the scope of the present invention.

[0031] like Figures 1 to 3 As shown, this embodiment provides a square combined dehydration tank. The combined dehydration tank body is rectangular when viewed from above. The dehydration tank includes a dehydration tank frame, a straight wall plate 3, a top cover 11 and a lower cone 6.

[0032] The dehydration tank frame is composed of several grid-like frames assembled in a grid structure. The number of grid-like frames can be set to two, four or other numbers as needed. In this embodiment, the dehydration tank frame is composed of twelve grid-like frames assembled in a grid structure, such as Figure 2 shown.

[0033] Each of the grid-like frames is a square when viewed from above. The grid-like frame is composed of several prefabricated frame components connected together. The frame components include vertically arranged square columns 1 and upper crossbeams 2 and middle crossbeams 5 respectively connected vertically to the square columns 1. The square columns 1, upper crossbeams 2 and middle crossbeams 5 are all long strips.

[0034] A lower cone 6 is provided under each grid-like frame, and the lower cones 6 provided under several grid-like frames are connected in parallel with each other. The lower cone 6 is a square cone structure, and the lower cone 6 has a large end and a small end. The large end of the lower cone 6 is connected to the middle cross beam 5 of the grid-like frame, and the small end is provided with a discharge port 9. A control valve is provided on the discharge port 9 to control the opening and closing of the discharge port 9.

[0035] The square columns 1 on the outside of the dehydration tank frame are connected to the straight wall panels 3, which are composed of a number of prefabricated straight wall panel units. The top of the dehydration tank frame is provided with an adaptive top cover 11, which is composed of a number of prefabricated top cover units. The number of top covers 11 can be set to the same as the number of grid-shaped frames as needed. In this embodiment, the top cover 11 is composed of twelve prefabricated top cover units. Figure 2 shown.

[0036] The dehydration tank frame, straight wall panels 3, top cover 11, and lower cones 6, which correspond to the grid-like frames, form a sealed interior space within the dehydration tank for storing and dehydrating petroleum coke, preventing the leakage of coke fines during processing and thus reducing environmental pollution. Furthermore, the interior space of the combined dehydration tank can be partitioned or interconnected as needed.

[0037] The dehydration tank frame, the straight wall plate 3, the top cover 11 and the lower cone 6 are all made of steel; specifically, the cone section of the lower cone 6 is made of composite steel plate or stainless steel plate.

[0038] The combined dehydration tank is secured to the foundation surface by several square columns. The upper portions of two adjacent square columns 1 are reinforced by upper crossbeams 2, and the middle portion is reinforced by middle crossbeams 5. The expansion of the combined dehydration tank's horizontal area ensures stability while reducing the equipment's vertical footprint, maintaining a roughly constant height for the coke drum assembly.

[0039] A circular feed port 4 and a circular overflow port 10 are provided on the straight wall plate 3. The feed port 4 is connected to the bottom of the coke tower through a feed pipe for transporting petroleum coke; the overflow port 10 is connected to the overflow pipeline, and excess water during the dehydration process is discharged into the overflow pipeline through the overflow port 10.

[0040] There is also a material leveling device inside the dehydration tank to level the petroleum coke inside the dehydration tank.

[0041] A water filter pipe 7 is provided on the lower cone 6. The water filter pipe 7 is curved. The end of the water filter pipe 7 is connected to the water filter outlet 8. There is a water filter component inside the combined dehydration tank. The water filter component is a water filter component commonly used in existing dehydration tanks and will not be described in detail in this application.

[0042] The top cover 11 is provided with a breathing valve port 12, an emergency pressure relief valve port 13, an exhaust port 14, a level gauge port 16, and a top water inlet 17, all of which are circular. The radius of the emergency pressure relief valve port 13 and the exhaust port 14 is larger than that of the breathing valve port 12, the level gauge port 16, and the top water inlet 17. The breathing valve port 12 and the emergency pressure relief valve port 13 are used to install corresponding valves to maintain pressure balance inside and outside the equipment; the exhaust port 14 is used to discharge internal exhaust gas into the exhaust gas treatment pipeline. The level gauge port 16 provided on the top cover 11 can be installed with a level gauge to monitor the height of the petroleum coke entering the combined tank in real time. The top cover 11 is also provided with a square observation window 15 for observing the situation inside the tank.

[0043] A heating pipe 18 is laid around the outer wall of the lower cone 6 to heat the petroleum coke inside the dehydration tank when the ambient temperature is low to prevent the petroleum coke from freezing.

[0044] The exterior of the lower cone 6 is equipped with a rapper 19 and a quick-opening sampling port 20, with the quick-opening sampling port 20 located below the rapper 19. When the combined dehydration tank is operating, the rapping action of the rapper 19 prevents the petroleum coke from clumping and adhering. When the moisture content of the petroleum coke needs to be tested, a sample is taken through the quick-opening sampling port 20.

[0045] Working process: Before the petroleum coke enters the combined dehydration tank from the coke tower, a certain amount of water is first injected into the tank body through the top water inlet 17 to act as a buffer. Subsequently, the petroleum coke is directly discharged into the interior of the combined dehydration tank through the feed port 4 of the combined dehydration tank from the bottom of the coke tower. In this process, excess water is discharged out of the tank body through the overflow port 10, and the generated exhaust gas is discharged to the exhaust gas treatment unit through the top exhaust port 14. After all the petroleum coke is discharged into the combined dehydration tank, it is left to stand for a certain period of time for dehydration. The dehydrated water is discharged through the filtered water pipe 7 and recycled after further treatment. In order to ensure that the moisture content of the petroleum coke meets the standard, sampling and testing are carried out through the quick-opening sampling port 20. When the test results meet the standard, the control valve on the discharge port 9 is opened to discharge the petroleum coke out of the combined dehydration tank through the discharge port 9.

[0046] It should be noted that the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the present invention.

Claims

1. A square combined dehydration tank, characterized by: The invention comprises a dehydration tank frame, a straight wall plate (3), a top cover (11) and a lower cone (6), wherein the dehydration tank frame is formed by combining a plurality of grid-like frames into a square shape, and each of the grid-like frames is formed by connecting a plurality of prefabricated frame components, wherein the frame components include vertically arranged square columns (1) and upper crossbeams (2) and middle crossbeams (5) respectively connected to the square columns (1). A lower cone (6) is provided below the grid-like frame, wherein the lower cone (6) is a square cone structure and has a large end and a small end. The large end of the lower cone (6) is connected to the middle crossbeam (5) of the grid-like frame, and the small end is provided with a discharge port (9); The square columns (1) on the outside of the dehydration tank frame are connected to the straight wall plate (3), and the straight wall plate (3) is provided with a feed port (4) and an overflow port (10); the top of the dehydration tank frame is provided with an adapted top cover (11), and the top cover (11) is provided with a top water inlet (17); The dehydration tank frame, the straight wall plate (3), the top cover (11) and the lower cone (6) form a closed space inside the dehydration tank for storing and dehydrating petroleum coke.

2. A square combined dehydration tank according to claim 1, characterized in that: The top cover (11) is composed of a plurality of prefabricated top cover units connected together, and the straight wall panel (3) is composed of a plurality of prefabricated straight wall panel units connected together.

3. The square combined dehydration tank according to claim 1, characterized in that: The cone section of the lower cone (6) is made of composite steel plate or stainless steel plate.

4. The square combined dehydration tank according to claim 1, characterized in that: A material leveling device is provided inside the dehydration tank for leveling the petroleum coke inside the dehydration tank.

5. The square combined dehydration tank according to claim 1, characterized in that: A water filter pipe (7) is provided on the lower cone (6), and the end of the water filter pipe (7) is connected to the water filter outlet (8).

6. The square combined dehydration tank according to claim 1, characterized in that: The top cover (11) is provided with a breathing valve port (12) and an emergency pressure relief valve port (13), which are used to install corresponding valves to maintain pressure balance inside and outside the equipment.

7. The square combined dehydration tank according to claim 1, characterized in that: The top cover (11) is provided with an exhaust port (14) for discharging internal exhaust gas into an exhaust gas treatment pipeline.

8. The square combined dehydration tank according to claim 1, characterized in that: The top cover (11) is provided with a square observation window (15) and a level meter port (16) for monitoring the internal conditions of the tank.

9. The square combined dehydration tank according to claim 1, characterized in that: A heating pipe (18) is laid around the outer peripheral wall of the lower cone (6).

10. The square combined dehydration tank according to claim 1, characterized in that: A vibrator (19) and a quick-opening sampling port (20) are provided on the outside of the lower cone (6).

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