Environmentally friendly wet quenching system

Abstract

The environmentally friendly wet quenching system of the present invention relates to the field of quenching technology in the coking industry, and in particular to a wet quenching system with environmental protection function. The present invention comprises: a quenching car travels along its track, enters and exits the bottom of a quenching tower, and a fixed cover and a top water spraying device are arranged in the quenching tower; a dust removal and whitening equipment is connected to the quenching tower through a pipeline; a movable cover is arranged at the lower part of the fixed cover, and the movable cover moves downward to cover the top of the quenching car; the environmentally friendly wet quenching system also includes a side water spraying device; the side water spraying device has N nozzles, each of which is aimed at a water injection port at the rear of the rear side wall of the quenching car; and each nozzle is provided with a flow regulating valve. The technical solution of the present invention solves the problems in the prior art that the quenching flue gas is highly dissipated, the "white smoke" of the tail gas is serious; the water consumption is large; the quenching time is long; the quenching is not complete, resulting in damage to the coke drying platform and the conveyor belt; the quenching water is highly corrosive to the vehicle body structure, resulting in a short service life of the whole vehicle.

Description

Technical Field

[0001] The invention discloses an environmentally friendly wet coke quenching system, which relates to the technical field of coke quenching in the coking industry, and in particular to a wet coke quenching system with environmental protection function. Background Art

[0002] The coke produced by the coke oven has a temperature of about 1050℃ and needs to be extinguished and cooled, which is called quenching. There are two main quenching methods: dry quenching and wet quenching. Among them, wet quenching, as a traditional method, still occupies a place due to its advantages such as low investment, fast construction, simple equipment structure and low failure rate. However, the common problems of the common wet quenching method are:

[0003] 1. The coke box of the coke quenching car is not well sealed, the coke box and the flue gas hood are not well sealed, the flue gas overflows seriously, the dust content of the flue gas discharged into the atmosphere is high, and the "white smoke" and other pollution phenomena are serious;

[0004] 2. The quenching time is too long, the water consumption is large, and the moisture content of the coke at the top of the coke pile is too high;

[0005] 3. The center of the bottom of the coke pile cannot be completely extinguished, and the remaining "red coke" will cause damage to the coke drying platform and coke conveyor belt;

[0006] 4. The coke box of the quenching car is not a sealed structure. The quenching water leaking from the coke box will wash away important parts such as the frame and the traveling mechanism for a long time, causing serious corrosion and shortening the life of the whole car.

[0007] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new type of environmentally friendly wet coke quenching system to overcome the problems existing in the prior art. Summary of the invention

[0008] According to the above-mentioned prior art, the quenching flue gas has a lot of escape, the "white smoke" of the tail gas is serious; the water consumption is large; the quenching time is long; the quenching is not thorough, causing damage to the coke drying platform and the conveyor belt; the quenching water is highly corrosive to the vehicle body structure, resulting in a short service life of the whole vehicle and other technical problems, and an environmentally friendly wet quenching system is provided. The present invention mainly designs a closed quenching vehicle coke box with water gushing from the bottom and spraying from the top, a quenching tower with a safety flap, dust removal and whitening equipment, and a circulating water pool, so as to shorten the quenching time, ensure that the hot coke is quenched once, reduce the water content of the finished coke, make the coke particle size uniform, reduce the content of water vapor and solid particles in the flue gas, refine the solid particles, and achieve the effect of tail gas emission meeting the standards.

[0009] The technical means adopted by the present invention are as follows:

[0010] The principle of quenching hot coke of the present invention is mainly water gushing from the bottom and supplemented by water spraying from the top.

[0011] An environmentally friendly wet coke quenching system comprises: a coke quenching tower, a coke quenching car, a fixed cover, a top water spraying device and a dust removal and whitening device; the coke quenching car travels along its track and enters and exits the bottom of the coke quenching tower, and a fixed cover and a top water spraying device are arranged in the coke quenching tower; a movable cover is arranged at the lower part of the fixed cover, and the movable cover can cover the top of the coke quenching car by moving downward; the dust removal and whitening device is connected to the coke quenching tower through a pipeline; the characteristics are:

[0012] Furthermore, the coke quenching car comprises: a car body and a bucket-shaped coke box on the upper part of the car body; the bucket-shaped coke box is a box-type structure with an open top composed of a rear side wall, two end walls, a front side wall and a bottom plate, which is used to receive coke and keep quenching water and smoke from overflowing; the box-type structure is sealed on all sides and the bottom plate, and the water pipes and smoke pipes are made of stainless steel; a coke-blocking door and a water-blocking door are arranged at the lower part of the front side wall, and their function is that when quenching is completed, the water-blocking door needs to be opened to drain water before unloading the coke, and after the coke in the car is drained, the coke quenching car moves to the coke drying platform, and then the coke-blocking door is opened to unload the coke; the rear side wall and the bottom plate are both designed to be hollow structures, and the hollow structures of the two are connected; a water injection port is arranged at the rear of the rear side wall; and a plurality of rows of water gushing ports are arranged on the upper surface of the bottom plate along the length direction of the car body.

[0013] Further, the coke quenching tower comprises: a cover fixing seat, an air intake port, an air return port, an exhaust port, a positive pressure safety flap, a smoke pressure sensor and a negative pressure safety flap; the cover fixing seat is arranged in the middle of the coke quenching tower, and a fixed cover is fixedly mounted thereon; the smoke pressure sensor is mounted on the upper part of the cover fixing seat; the negative pressure safety flap is mounted on the side wall of the fixed cover, and the negative pressure safety flap can be opened inward; the air return port and the air intake port are arranged on the tower wall at the upper part of the coke quenching tower from top to bottom; the positive pressure safety flap is arranged in the upper part of the coke quenching tower, and the positive pressure safety flap can be flipped upward;

[0014] Furthermore, a movable cover is provided at the lower part of the fixed cover, and the movable cover can cover the top of the quenching car by moving downward; the movable cover is always in an extended state in the quenching condition, and its lower plane contacts the top of the coke box of the quenching car to form a sealed cavity; in other conditions, the movable cover is always in a retracted state so that the quenching car can pass under it. The upper plane of the coke box of the quenching car and the lower plane of the movable cover are both surrounded by a wide sealing plate, which allows a certain amount of misalignment in the plane, and the parking position of the quenching car does not need to be particularly precise, and there is still a sealing effect.

[0015] Furthermore, the dust removal and whitening equipment includes: a venturi dust collector, a dehydration tower, a cyclone group dust collector, a wet electrostatic dust collector and an induced draft fan; the venturi dust collector, the dehydration tower cyclone group dust collector, the wet electrostatic dust collector and the induced draft fan are connected in sequence through pipelines, the venturi dust collector is connected to the air intake port through the flue gas duct, and the induced draft fan is connected to the return air port through the flue gas duct.

[0016] Furthermore, the quenching flue gas and steam mist pass through the flue gas duct, first pass through the Venturi dust collector for cooling and humidification, and then enter the dehydration tower for cooling and steam purification and dehydration, and then reach the cyclone group dust collector for dust removal. At this time, most of the water vapor and dust have been removed, and then pass through the wet electrostatic precipitator for secondary purification, and finally are sent to the return air port of the quenching tower by the induced draft fan and the flue gas duct, and discharged into the atmosphere from the exhaust port.

[0017] Furthermore, according to different requirements for wet quenching flue gas treatment, the dehydration tower, cyclone group dust collector, and wet electrostatic precipitator can be used simultaneously, or only one or more of them can be used in combination.

[0018] Furthermore, the environmentally friendly wet quenching system also includes a side water spray device; the side water spray device has N nozzles, which are arranged in a row along the length direction of the car body and are arranged inside the quenching tower, and each nozzle is aimed at a water injection port at the rear of the rear wall of the quenching car; each nozzle is provided with a flow regulating valve, which can adjust the flow of each water channel according to the water demand at the bottom of the coke pile, to ensure that the coke is evenly quenched and not locally soaked for too long.

[0019] Furthermore, the quenching tower, dehydration tower and cyclone dust collector are all connected to the circulating water pool through a sewage pipeline, and the sewage is collected into the circulating water pool. The circulating water pool is connected to the side wall water spraying device through a clean water pipeline to provide clean water for spraying.

[0020] Furthermore, a plurality of evenly distributed water-blocking plates are arranged inside the rear side wall and the bottom plate along the length direction of the vehicle body, dividing the inside of the bottom plate into N parallel water channels, and each column of water channels is provided with a water inlet and a water gushing outlet.

[0021] Furthermore, the water inlets include: an upper water inlet, a middle water inlet and a lower water inlet, which are arranged from top to bottom on each row of water channels on the bottom plate and arranged from high to low in the form of an upper water inlet and a lower water inlet with the middle water inlet spaced apart.

[0022] Furthermore, an upwardly inclined guide plate is provided in each water gushing outlet to make water gush out from bottom to top.

[0023] Furthermore, a raised lining plate is arranged on the upper part of the water inlet, and the quenching water flows into the coke from below the lining plate, while the coke will not fall back into the waterway from the water inlet.

[0024] Furthermore, a positive pressure safety flap is arranged between the air intake and the air return port, and is closed by gravity or spring force. When the pressure in the tower is too high, the positive pressure safety flap is pushed upward, and the air intake and the air return port are connected, so that the high pressure in the tower is unloaded, thereby ensuring the safety of the quenching tower and the flue gas duct.

[0025] Furthermore, the negative pressure safety flap is closed by gravity or spring force. When the flue gas pressure is lower than the atmospheric pressure and reaches the set limit value, the pressure difference can automatically push the negative pressure safety flap open to unload the load, further ensuring the safety of the quenching tower and the flue gas duct.

[0026] Furthermore, the induced draft fan is driven by a variable frequency motor, and the power supply frequency is adjusted to control the air volume in real time and indirectly control the pressure in the flue gas duct.

[0027] Furthermore, the smoke pressure sensor is located between the positive pressure safety flap and the fixed cover, and the collected pressure signal is interlocked with the power supply frequency control signal of the induced draft fan motor.

[0028] Furthermore, the dehydration tower comprises: an R-shaped folded plate dehydration layer, a heat exchange tube layer, and a cooling spray layer;

[0029] Furthermore, the interior of the dehydration tower is provided with an R-shaped folded plate dehydration layer, a cooling spray layer, a heat exchange tube layer and an R-shaped folded plate dehydration layer in sequence from top to bottom.

[0030] Furthermore, the heat exchange tube layer is formed by bending stainless steel tubes. Cold water is injected from the higher water inlet, and after heat exchange with the flue gas, it flows out from the lower water outlet. The hot water converted into hot water can be transported to the place where hot water is needed for reuse. At the same time, the moisture in the flue gas is condensed on the outer wall of the tube to achieve the purpose of eliminating the whiteness of the exhaust gas.

[0031] The coke quenching process of the present invention is:

[0032] 1. The quenching car drives into the quenching tower, and the parking position is aligned with the movable cover;

[0033] 2. Extend the movable cover to make it contact with the upper plane of the coke box of the coke quenching car to seal;

[0034] 3. Send the quenching car position signal, movable cover sealing signal, water gate closing signal and coke gate closing signal to the control system;

[0035] 4. Start the induced draft fan and run it at idle speed;

[0036] 5. Open the side wall water spray valve and the top water spray valve to start quenching;

[0037] 6. As the flue gas volume increases, the flue gas pressure sensor is used to interlock and control the air volume of the induced draft fan, thereby ensuring that the flue gas pressure is within a reasonable range and that water spraying is continued to quench the coke for a reasonable period of time;

[0038] 7. Close the side wall spray valve and top spray valve;

[0039] 8. Open the water gate of the quenching car until the quenching water is drained;

[0040] 9. Retract the movable cover;

[0041] 10. Turn off the induced draft fan;

[0042] 11. The coke quenching vehicle drives to the coke drying platform;

[0043] 12. Open the coke blocking door until the coke unloading is completed;

[0044] 13. Close the coke blocking door, close the water blocking door, and drive the coke quenching car to the next furnace to prepare for receiving the coke.

[0045] Compared with the prior art, the present invention has the following advantages:

[0046] 1. The environmentally friendly wet coke quenching system provided by the present invention can significantly reduce the amount of dust and water vapor in the emissions that eventually enter the atmosphere, and the size of solid particles can be further refined to achieve standard emissions;

[0047] 2. In the environmentally friendly wet coke quenching system provided by the present invention, the hot coke pile is in contact with cold water all around, and after being split in the sealed chamber, it rolls and is surrounded by water and steam, which effectively avoids the phenomenon that a thick coke pile cannot be quenched in one go, shortens the quenching time, reduces the water content of the finished coke, and makes the particle size uniform;

[0048] 3. The environmentally friendly wet coke quenching system provided by the present invention has good water sealing effect of the coke box, small demand for quenching water, and water vapor is recycled and reused after condensation, so the total water consumption for quenching is reduced, saving water resources;

[0049] 4. The environmentally friendly wet coke quenching system provided by the present invention avoids the phenomenon of coke splashing and waste, and the quenching water and coke powder hardly contact the body of the coke quenching car other than the coke box, which can extend the service life of the coke quenching car;

[0050] 5. In the environmentally friendly wet quenching system provided by the present invention, the water at the bottom of the coke pile comes from the side wall water spraying device, and the water inlet faces the side of the coke quenching car instead of facing upward, which can prevent coke from accidentally entering the water system when receiving coke and causing blockage;

[0051] 6. The environmentally friendly wet coke quenching system provided by the present invention can have a lot of sprinklers arranged along the length direction of the coke box of the coke quenching car, so the bottom plate of the coke quenching car can obtain a very uniform water gushing effect, especially it can completely solve the problem of the red coke in the middle of the coke quenching car with a long coke box not being quenched thoroughly;

[0052] 7. The environmentally friendly wet coke quenching system provided by the present invention has relatively independent functional equipment and a modular layout, which is easy to maintain and overhaul.

[0053] In summary, the technical solution of the present invention solves the problems in the prior art such as high emission of quenching flue gas, serious "white smoke" in tail gas, high water consumption, long quenching time, incomplete quenching, resulting in damage to the coke drying platform and conveyor belt, and high corrosiveness of quenching water to the vehicle body structure, resulting in a short service life of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0055] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0056] Figure 2 It is a schematic diagram of the structure inside the coke quenching tower;

[0057] Figure 3 for Figure 2 AA cross-sectional structural diagram;

[0058] Figure 4 Schematic diagram of the internal structure of the dehydration tower.

[0059] In the figure:

[0060] 1. Coke quenching tower 1-1, cover fixing seat 1-2, air inlet 1-3, air return port 1-4, discharge port 1-5, positive pressure safety flap 1-6, flue gas pressure sensor 1-7, negative pressure safety flap;

[0061] 2. Coke quenching car 2-1, rear side wall 2-2, end wall 2-3, front side wall 2-4, coke blocking door 2-5, water blocking door 2-6, bottom plate 2-6-1, upper water inlet 2-6-2, middle water inlet 2-6-3, lower water inlet 2-6-4, water baffle 2-7, car body;

[0062] 3. Side wall water spray device 3-1. Flow regulating valve;

[0063] 4. Movable cover

[0064] 5. Fixed hood

[0065] 6. Top water spray device;

[0066] 7. Coke;

[0067] 8. Venturi dust collector;

[0068] 9. Dehydration tower 9-1, R-shaped folded plate dehydration layer 9-2, heat exchange tube layer 9-2-1, water inlet 9-2-2, water outlet 9-3, cooling spray layer;

[0069] 10. Cyclone dust collector;

[0070] 11. Wet electrostatic precipitator;

[0071] 12. induced draft fan;

[0072] 13. Flue gas duct;

[0073] 14. Sewage pipeline;

[0074] 15. Circulating water pool;

[0075] 16. Water purification pipeline. DETAILED DESCRIPTION

[0076] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0077] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0078] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0079] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0080] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0081] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0082] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0083] As shown in the figure, the present invention provides an environmentally friendly wet quenching system, comprising: a quenching tower 1, a quenching car 2, a fixed cover 5, a top water spray device 6 and a dust removal and whitening device; the quenching car 2 travels along its track and enters and exits the bottom of the quenching tower 1, and the fixed cover 5 and the top water spray device 6 are arranged in the quenching tower 1; a movable cover 4 is arranged at the lower part of the fixed cover 5, and the movable cover 4 can cover the top of the quenching car 2 by moving downward; the dust removal and whitening device is connected to the quenching tower 1 through a pipeline; the characteristics are:

[0084] The coke quenching car 2 comprises: a car body 2-7 and a bucket-shaped coke box on the upper part of the car body 2-7; the bucket-shaped coke box is a box-shaped structure with an open top composed of a rear side wall 2-1, two end walls 2-2, a front side wall 2-3 and a bottom plate 2-6; a coke blocking door 2-4 and a water blocking door 2-5 are arranged at the lower part of the front side wall 2-3; the rear side wall 2-1 and the bottom plate 2-6 are both designed as hollow structures, and the hollow structures of the two are connected; a water injection port is arranged at the rear of the rear side wall 2-1; and a plurality of water inflow ports are arranged on the upper surface of the bottom plate 2-6 along the length direction of the car body 2-7;

[0085] The coke quenching tower 1 comprises: a cover fixing seat 1-1, an air inlet 1-2, an air return port 1-3, an exhaust port 1-4, a positive pressure safety flap 1-5, a flue gas pressure sensor 1-6 and a negative pressure safety flap 1-7; the cover fixing seat 1-1 is arranged in the middle of the coke quenching tower 1, and a fixed cover 5 is fixedly mounted thereon; the flue gas pressure sensor 1-6 is mounted on the upper part of the cover fixing seat 1-1; the negative pressure safety flap 1-7 is mounted on the side wall of the fixed cover 5, and the negative pressure safety flap 1-7 can be opened inward; the air return port 1-3 and the air inlet 1-2 are arranged on the tower wall of the upper part of the coke quenching tower 1 from top to bottom; the positive pressure safety flap 1-5 is arranged in the upper part of the coke quenching tower 1, and the positive pressure safety flap 1-5 can be turned up;

[0086] A movable cover 4 is arranged at the lower part of the fixed cover 5, and the movable cover 4 can cover the top of the quenching car (2) by moving downward;

[0087] The dust removal and whitening equipment includes: a venturi dust collector 8, a dehydration tower 9, a cyclone group dust collector 10, a wet electrostatic dust collector 11 and an induced draft fan 12; the venturi dust collector 8, the dehydration tower 9, the cyclone group dust collector 10, the wet electrostatic dust collector 11 and the induced draft fan 12 are connected in sequence through pipelines, the venturi dust collector 8 is connected to the air intake port 1-2 through the flue gas pipeline 13, and the induced draft fan 12 is connected to the air return port 1-3 through the flue gas pipeline 13;

[0088] The environmentally friendly wet quenching system also includes a side water spray device 3; the side water spray device 3 has N nozzles, which are arranged in a row along the length direction of the car body 2-7 and are arranged inside the quenching tower 1, and each nozzle is aimed at a water injection port at the rear of the rear side wall 2-1 of the quenching car 2; each nozzle is provided with a flow regulating valve 3-1.

[0089] The quenching tower 1, the dehydration tower 9 and the cyclone group dust collector 10 are all connected to the circulating water pool 15 through the sewage pipeline 14, and the sewage is collected into the circulating water pool 15. The circulating water pool 15 is connected to the side wall water spraying device 3 through the clean water pipeline 16 to provide clean water for spraying.

[0090] A plurality of evenly distributed water-blocking plates 2-6-4 are arranged inside the rear side wall 2-1 and the bottom plate 2-6 along the length direction of the vehicle body 2-7, dividing the bottom plate 2-6 into N parallel water channels, and each column of the water channels is provided with a water inlet and a water gushing outlet.

[0091] The water outlets include: an upper water outlet 2-6-1, a middle water outlet 2-6-2 and a lower water outlet 2-6-3, which are arranged from top to bottom on each water channel of the bottom plate 2-6, and arranged from high to low in the form of an upper water outlet 2-6-1 and a lower water outlet 2-6-3 with the middle water outlet 2-6-2 spaced apart.

[0092] An upwardly inclined guide plate is arranged in the water outlet to make the water gush out from bottom to top.

[0093] A raised lining plate is arranged above the water inlet, and the quenching water flows into the coke 7 from below the lining plate, while the coke 7 will not fall back into the waterway from the water inlet.

[0094] The positive pressure safety flap 1-5 is arranged between the air intake port 1-2 and the air return port 1-3, and is closed by gravity or spring force. When the pressure in the tower is too high, the positive pressure safety flap 1-5 is pushed upward, and the air intake port 1-2 and the air return port 1-3 are connected, so that the high pressure in the tower is unloaded, ensuring the safety of the quenching tower 1 and the flue gas duct.

[0095] The negative pressure safety flap 1-7 is closed by gravity or spring force. When the flue gas pressure is lower than the atmospheric pressure and reaches the set limit value, the negative pressure safety flap 1-7 can be automatically pushed open by the pressure difference to unload, further ensuring the safety of the quenching tower 1 and the flue gas duct.

[0096] The induced draft fan 12 is driven by a variable frequency motor. By adjusting the power supply frequency, the air volume can be controlled in real time, and the pressure in the flue gas duct can be indirectly controlled.

[0097] The flue gas pressure sensor 1-6 is located between the positive pressure safety flap 1-5 and the fixed cover 5, and the collected pressure signal is interlocked with the power supply frequency control signal of the induced draft fan motor.

[0098] The dehydration tower 9 comprises: an R-shaped folded plate dehydration layer 9-1, a heat exchange tube layer 9-2, and a cooling spray layer 9-3; the interior of the dehydration tower 9 is sequentially provided with an R-shaped folded plate dehydration layer 9-1, a cooling spray layer 9-3, a heat exchange tube layer 9-2, and an R-shaped folded plate dehydration layer 9-1 from top to bottom; the heat exchange tube layer 9-2 is formed by bending a stainless steel tube, and cold water is injected from a higher water inlet 9-2-1, and after heat exchange with the flue gas, it flows out from a lower water outlet 9-2-2, and the hot water converted into hot water can be transported to a place where hot water is needed for reuse; at the same time, the moisture in the flue gas is condensed on the outer wall of the tube to achieve the purpose of eliminating the whiteness of the exhaust gas.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An environmentally friendly wet coke quenching system, comprising: A coke quenching tower (1), a coke quenching vehicle (2), a fixed cover (5), a top water spray device (6) and a dust removal and de-dusting device; the coke quenching vehicle (2) travels along its track and enters and exits the bottom of the coke quenching tower (1); a fixed cover (5) and a top water spray device (6) are arranged in the coke quenching tower (1); the dust removal and de-dusting device is connected to the coke quenching tower (1) via a pipeline; the characteristics are: The coke quenching car (2) comprises: a car body (2-7) and a bucket-shaped coke box on the upper part of the car body (2-7); the bucket-shaped coke box is a box-shaped structure with an open top, which is composed of a rear side wall (2-1), two end walls (2-2), a front side wall (2-3) and a bottom plate (2-6); a coke blocking door (2-4) and a water blocking door (2-5) are arranged at the lower part of the front side wall (2-3); the rear side wall (2-1) and the bottom plate (2-6) are both designed as hollow structures, and the hollow structures of the two are connected; a water injection port is arranged at the rear of the rear side wall (2-1); and a plurality of water-blocking holes are arranged on the upper surface of the bottom plate (2-6) along the length direction of the car body (2-7). A plurality of evenly distributed water baffles (2-6-4) are arranged inside the rear side wall (2-1) and the bottom plate (2-6) along the length direction of the vehicle body (2-7), dividing the bottom plate (2-6) into N parallel waterways, and a water injection port and a water gushing port are arranged on each waterway; the water gushing ports include: an upper water gushing port (2-6-1), a middle water gushing port (2-6-2) and a lower water gushing port (2-6-3), which are arranged from top to bottom on each waterway of the bottom plate (2-6), and arranged from high to low in the form of an upper water gushing port (2-6-1) and a lower water gushing port (2-6-3) separated by a middle water gushing port (2-6-2); The coke quenching tower (1) comprises: a cover fixing seat (1-1), an air intake port (1-2), an air return port (1-3), an exhaust port (1-4), a positive pressure safety flap (1-5), a smoke pressure sensor (1-6) and a negative pressure safety flap (1-7); the cover fixing seat (1-1) is arranged at the middle position of the coke quenching tower (1), and a fixed cover (5) is fixedly mounted thereon; the smoke pressure sensor (1-6) is mounted on the upper part of the cover fixing seat (1-1); the negative pressure safety flap (1-7) is mounted on the side wall of the fixed cover (5), and the negative pressure safety flap (1-7) can be opened inwardly; the air return port (1-3) and the air intake port (1-2) are arranged on the upper tower wall of the coke quenching tower (1) from top to bottom; the positive pressure safety flap (1-5) is arranged at the upper part of the coke quenching tower (1), and the positive pressure safety flap (1-5) can be flipped upwardly; A movable cover (4) is arranged at the lower part of the fixed cover (5), and the movable cover (4) can cover the top of the quenching car (2) by moving downward; The dust removal and whitening equipment comprises: a venturi dust collector (8), a dehydration tower (9), a cyclone group dust collector (10), a wet electrostatic dust collector (11) and an induced draft fan (12); the venturi dust collector (8), the dehydration tower (9), the cyclone group dust collector (10), the wet electrostatic dust collector (11) and the induced draft fan (12) are connected in sequence through pipelines, the venturi dust collector (8) is connected to the air intake port (1-2) through the flue gas pipeline (13), and the induced draft fan (12) is connected to the air return port (1-3) through the flue gas pipeline (13). The dehydration tower (9) comprises: an R-shaped folded plate dehydration layer (9-1), a heat exchange tube layer (9-2), and a cooling spray layer (9-3); the interior of the dehydration tower (9) is provided with an R-shaped folded plate dehydration layer (9-1), a cooling spray layer (9-3), a heat exchange tube layer (9-2), and an R-shaped folded plate dehydration layer (9-1) in order from top to bottom; the heat exchange tube layer (9-2) is formed by bending a stainless steel tube, and cold water is injected from a higher water inlet (9-2-1), exchanges heat with the flue gas, and then flows out from a lower water outlet (9-2-2); The environmentally friendly wet quenching system further comprises a side wall water spraying device (3); the side wall water spraying device (3) comprises N nozzles arranged in a row along the length direction of the car body (2-7) and arranged inside the quenching tower (1), each nozzle being aimed at a water injection port at the rear of the rear side wall (2-1) of the quenching car (2); and each nozzle being provided with a flow regulating valve (3-1).

2. The environmentally friendly wet coke quenching system according to claim 1, characterized in that: The quenching tower (1), dehydration tower (9) and cyclone dust collector (10) are all connected to a circulating water pool (15) via a sewage pipeline (14), and the sewage is collected into the circulating water pool (15). The circulating water pool (15) is connected to the side wall water spraying device (3) via a clean water pipeline (16) to provide clean water for spraying.

3. The environmentally friendly wet coke quenching system according to claim 1, characterized in that: An upwardly inclined guide plate is arranged in each of the water gushing outlets to guide water to gush out from the bottom to the top; a raised lining plate is arranged above the water gushing outlet, and the quenching water flows into the coke (7) from below the lining plate, while the coke (7) will not fall back into the waterway from the water gushing outlet.

4. The environmentally friendly wet coke quenching system according to claim 1, characterized in that: The positive pressure safety flap (1-5) is arranged between the air intake port (1-2) and the air return port (1-3) and is closed by gravity or spring force. When the pressure in the tower is too high, the positive pressure safety flap (1-5) is pushed upward, and the air intake port (1-2) and the air return port (1-3) are connected, so that the high pressure in the tower is unloaded, thereby ensuring the safety of the quenching tower (1) and the flue gas duct.

5. The environmentally friendly wet coke quenching system according to claim 1, characterized in that: The negative pressure safety flap (1-7) is closed by gravity or spring force. When the flue gas pressure is lower than the atmospheric pressure and reaches a set limit value, the negative pressure safety flap (1-7) can be automatically pushed open by the pressure difference to unload the load, thereby further ensuring the safety of the quenching tower (1) and the flue gas duct (13).

6. The environmentally friendly wet coke quenching system according to claim 1, characterized in that: The induced draft fan (12) is driven by a variable frequency motor, and the power supply frequency is adjusted to control the air volume in real time, thereby indirectly controlling the pressure in the smoke duct.

7. The environmentally friendly wet coke quenching system according to claim 1, characterized in that: The flue gas pressure sensor (1-6) is located between the positive pressure safety flap (1-5) and the fixed cover (5), and the collected pressure signal is interlocked with the power supply frequency control signal of the induced draft fan motor.

Images