CN216998281U - Environment-friendly wet quenching system - Google Patents

Abstract

The utility model is an environment-friendly wet coke quenching system, which relates to the technical field of coke quenching in the coking industry, in particular to a wet coke quenching system with an environmental protection function. The utility model comprises: a coke quenching vehicle travels along its track, enters and exits the lower part of the coke quenching tower, a fixed cover and a top water spray device are arranged in the coke quenching tower; The lower part is provided with a movable cover, which can be moved down to cover the top of the coke quenching car; the environmental-friendly wet coke quenching system also includes a side water spray device; A water injection port at the rear of the side wall; each nozzle is provided with a flow regulating valve. The technical scheme of the utility model solves the problem that the coke quenching flue gas in the prior art escapes a lot, and the "white smoke" of the tail gas is serious; the water consumption is large; the coke quenching time is long; The quenching water is highly corrosive to the car body structure, resulting in problems such as short service life of the whole car.

Description

Environmentally friendly wet coke quenching system

technical field

The utility model relates to an environment-friendly wet coke quenching system, which relates to the technical field of coke quenching in the coking industry, in particular to a wet coke quenching system with an environmental protection function.

Background technique

The coke produced from the coke oven has a discharge temperature of about 1050 ℃, which needs to be quenched and cooled, which is called quenching. At present, there are mainly two quenching methods: dry quenching and wet quenching. Among them, wet coke quenching, as a traditional method, still occupies a place due to its advantages of less investment, fast construction, simple equipment structure and low failure rate. But the common wet quenching method, the common problems are:

1. The coke box of the coke quenching car is not well sealed, and the sealing between the coke box and the flue gas hood is not good, the flue gas overflow is serious, the flue gas discharged into the atmosphere has a high dust content, and the pollution phenomenon such as "white smoke" is serious;

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

3. The central position of the bottom of the coke pile cannot be extinguished completely, and the residual "red coke" will cause damage to the coke drying table and the coke conveyor belt;

4. The coke box of the coke quenching car is not a sealed structure. The coke quenching water leaking from the coke box washes away important parts such as the frame and the traveling mechanism for a long time, and the corrosion is serious, and the life of the whole car is too short;

In view of the above problems in the prior art, it is very necessary to research and design a new type of environment-friendly wet coke quenching system to overcome the problems in the prior art.

SUMMARY OF THE INVENTION

According to the above-mentioned prior art, the coke quenching flue gas has a lot of escape, and the tail gas has serious "white smoke"; the water consumption is large; the coke quenching time is long; It is highly corrosive to the structure of the car body, resulting in technical problems such as short service life of the entire car, and an environment-friendly wet coke quenching system is provided. The utility model mainly designs a closed coke quenching car coke box with water gushing at the bottom and water spraying at the top, a coke quenching tower with a safety flap, a dedusting and whitening device and a circulating water pool, so as to shorten the coke quenching time and ensure that the hot coke is quenched at one time. It can reduce the water content of the finished coke, make the coke particle size uniform, and reduce the water vapor and solid particle content in the flue gas, refine the solid particles, and achieve the effect of exhaust gas discharge.

The technical means adopted by the utility model are as follows:

The principle of the hot coke extinguishing of the utility model is that the bottom is mainly gushing water, and the top is simultaneously spraying water.

An environment-friendly wet coke quenching system, comprising: a coke quenching tower, a coke quenching car, a fixed cover, a top water spray device and a dedusting and whitening device; A fixed cover and a top water spray device are arranged in the tower; a movable cover is arranged at the lower part of the fixed cover, and the movable cover moves down to cover the top of the coke quenching car; the dedusting and whitening equipment is connected with the coke quenching tower through pipelines; it is characterized in that :

Further, the coke quenching car includes: 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-shaped structure with an open top composed of a rear side wall, two end walls, a front side wall and a bottom plate. It is used to undertake coke and keep the coke quenching water and flue gas from overflowing; the box-shaped structure and the bottom plate are sealed and manufactured, and the water pipes and flue gas pipes are all made of stainless steel; the lower part of the front side wall is provided with a coke blocking door and a water blocking door. At the end of coke quenching, you need to open the water blocking door to drain water before unloading the coke. After the coke in the car is drained, the coke quenching car will go to the coke drying table, and then open the coke blocking door to unload the coke; the rear side wall and bottom plate are designed as hollow structures. , and the hollow structures of the two are connected; the rear part of the rear side wall is provided with a water injection port; the upper surface of the bottom plate is provided with multiple rows of water injection ports along the length direction of the vehicle body.

Further, the coke quenching tower includes: a cover holder, a suction port, an air return port, a discharge port, a positive pressure safety flap, a flue gas pressure sensor and a negative pressure safety flap; the cover holder is arranged in the middle of the coke quenching tower. , a fixed cover is fixed on it; the flue gas pressure sensor is installed on the upper part of the cover fixed seat; the negative pressure safety flap is installed on the side wall of the fixed cover, and the negative pressure safety flap can be opened inward; The mouth is arranged on the tower wall of 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 turned up;

Further, a movable hood is arranged at the lower part of the fixed hood, and the movable hood can be moved down to cover the top of the coke quenching car; the movable hood, in the coke quenching condition, is always in a protruding state, and its lower plane is in contact with the top of the coke box of the coke quenching car. In other working conditions, the movable cover is always in a retracted state, so that the coke quenching car can pass under it. The upper plane of the coke box of the coke quenching car and the lower plane of the movable hood have a wide sealing plate, which allows a certain amount of dislocation in the plane. The parking position of the coke quenching car does not need to be particularly accurate, and the sealing effect is still there.

Further, the dedusting and whitening equipment includes: venturi dust collector, dehydration tower, cyclone group dust collector, wet electrostatic precipitator and induced draft fan; venturi dust collector, dehydration tower cyclone group dust collector, wet electrostatic precipitator and induced draft fan. The fans are connected through pipelines in turn, the venturi dust collector is connected with the suction port through the flue gas pipeline, and the induced draft fan is connected with the return air opening through the flue gas pipeline.

Further, the coke quenching flue gas and steam water mist pass through the flue gas pipeline first through the venturi dust collector for cooling, humidification and dust removal, and then enter the dehydration tower for cooling and purification steam dehydration, and then reach the cyclone group dust collector for dust removal. Part of the water vapor and dust is purified by the wet electrostatic precipitator for the second time, and finally sent to the return air port of the coke quenching tower by the induced draft fan and the flue gas pipeline, and discharged into the atmosphere from the discharge port.

Further, according to different requirements of wet coke quenching flue gas treatment, dehydration tower, cyclone group dust collector and wet electrostatic precipitator can be used at the same time, or only one or more of them can be used in combination.

Further, the environment-friendly wet coke quenching system also includes a side water spray device; the side water spray device has N spray heads, which are arranged in a line along the length of the vehicle body and are arranged inside the coke quenching tower, and each spray head is aligned with each other. A water injection port at the rear of the rear sidewall of the coke quenching car; each nozzle is equipped with a flow control valve, which can adjust the flow of each column of water channels according to the water demand at the bottom of the coke pile to ensure that the coke is evenly extinguished and the local soaking time is not too long .

Further, the coke quenching tower, the dehydration tower and the cyclone group dust collector are all connected with the circulating water tank through the sewage pipeline, and the sewage is merged into the circulating water tank. Clean water for spraying.

Further, the interior of the rear side wall and the bottom plate is provided with a plurality of uniformly distributed water baffles along the length direction of the vehicle body, and the bottom plate is divided into N parallel water channels, and each water channel is provided with a water injection port and a water spout.

Further, the water spout includes: an upper spout, a middle spout and a lower spout, which are arranged on each row of water channels on the bottom plate from top to bottom, and are in the form of the middle spout in the interval between the upper spout and the lower spout. arrangement.

Further, an upwardly inclined deflector is arranged in the water spout to spew the water out from the bottom to the top.

Further, a raised lining plate is arranged on the upper part of the water spout, and the coke quenching water pours into the coke from the bottom of the lining plate, and the coke will not fall into the water channel reversely from the water spout.

Further, the positive pressure safety flap is arranged between the suction port 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 suction port and the air return port are connected. , so that the high pressure in the tower is unloaded to ensure the safety of the coke quenching tower and the flue gas pipeline.

Further, 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 negative pressure safety flap can be automatically pushed open by this pressure difference to unload, which further ensures Safety of quench towers and flue gas ducts.

Further, the induced draft fan is driven by a variable frequency motor, and the power supply frequency can be adjusted, which can control the air volume in real time and indirectly control the pressure in the flue gas pipeline.

Further, the flue gas 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.

Further, the dehydration tower includes: an R-shaped folded plate dehydration layer, a heat exchange tube layer, and a cooling spray layer;

Further, R-type folded plate dehydration layer, cooling spray layer, heat exchange tube layer and R-type folded plate dehydration layer are sequentially arranged inside the dehydration tower from top to bottom.

Further, 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, and the hot water turned into hot water can be transported to the At the same time, the moisture in the flue gas is condensed on the outer wall of the pipe to achieve the purpose of whitening the exhaust gas.

The quenching process of the utility model is as follows:

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

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

3. Send the position signal of the coke quenching car, the sealing signal of the movable cover, the closing signal of the water blocking door and the closing signal of the coke blocking door to the control system;

4. Start the induced draft fan and run at idle speed;

5. Open the side wall water spray valve and the top water spray valve to start quenching the coke;

6. With the increase of flue gas volume, through the flue gas pressure sensor, the air volume of the induced draft fan is controlled in a chain, so as to ensure that the flue gas pressure is within a reasonable range, and the coke quenching with water spray continues for a reasonable time;

7. Close the side wall water spray and the top water spray valve;

8. Open the water blocking door of the quenching car until the quenching water is drained;

9. Retract the movable cover;

10. Turn off the induced draft fan;

11. Drive the coke quenching car to the coke drying table;

12. Open the coke blocking door until the coke removal is completed;

13. Close the coke blocking door, close the water blocking door, and drive the coke quenching car to the next furnace, ready to receive coke.

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

1. The environment-friendly wet coke quenching system provided by the present utility model can greatly reduce the amount of dust and water vapor in the discharge that finally enters the atmosphere, and the solid particle size can be more refined to achieve standard discharge;

2. In the environment-friendly wet coke quenching system provided by the present invention, the hot coke pile is in contact with cold water all around, and after splitting in the sealed cavity, it is rolled and surrounded by water and steam, which effectively avoids the phenomenon that thicker coke piles cannot be quenched at one time, and shortens the time. The long quenching time reduces the moisture content of the finished coke, and the particle size is uniform;

3. The environment-friendly wet coke quenching system provided by the utility model has good water sealing effect in the coke box, small demand for coke quenching water, and water vapor is recovered and reused by condensation, so the total water consumption of coke quenching is reduced and water resources are saved ;

4. The environment-friendly wet coke quenching system provided by the utility model can avoid the phenomenon of coke splashing and waste, and the coke quenching water and coke powder can hardly contact the car body other than the coke box of the coke quenching car, which can prolong the service life of the coke quenching car;

5. In the environment-friendly wet coke quenching system provided by the utility model, the source of the water at the bottom of the coke pile is the side wall water spray device, and the water inlet is directed to the side of the coke quenching car instead of upward, which can avoid coke errors when receiving coke. into the water system, causing blockage;

6. The environment-friendly wet coke quenching system provided by the utility model, because the side wall water spray device can arrange many nozzles 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 Completely solve the problem that the red coke cannot be quenched in the middle of the coke quenching car with a long coke box;

7. The environment-friendly wet coke quenching system provided by the utility model has relatively independent functional equipment and modular layout, which is convenient for maintenance and repair.

To sum up, the application of the technical solution of the present utility model solves the problems in the prior art that the coke quenching flue gas has a lot of escape, and the tail gas has serious "white smoke"; water consumption is large; coke quenching time is long; Damage to the coke table and conveyor belt; coke quenching water is highly corrosive to the car body structure, resulting in problems such as short service life of the whole car.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

Fig. 1 is the overall structure schematic diagram of the present utility model;

Figure 2 is a schematic diagram of the internal structure of the coke quenching tower;

Fig. 3 is the A-A sectional structure schematic diagram of Fig. 2;

Figure 4 is a schematic diagram of the internal structure of the dehydration tower.

In the picture:

1. Coke quenching tower 1-1, cover holder 1-2, suction port 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;

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 spout 2-6-2, middle spout 2-6-3, lower spout 2-6-4, baffle 2-7, car body;

3. Side wall water spray device 3-1. Flow control valve;

4. Active cover

5. Fixed cover

6. Top water spray device;

7. Coke;

8. Venturi dust collector;

9. Dehydration tower 9-1, R-type 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;

10. Cyclone group dust collector;

11. Wet electrostatic precipitator;

12. Induced fan;

13. Flue gas pipeline;

14. Sewage pipeline;

15. Circulating pool;

16. Water purification pipeline.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are only a part of the embodiments of the present invention, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application or uses in any way. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that the terminology used herein is for describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise. Meanwhile, it should be understood that, for convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship. Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the authorized specification. In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other examples of exemplary embodiments may have different values. It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present invention, it should be understood that orientation words such as "front, rear, top, bottom, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. The orientation or positional relationship is usually based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and these orientations do not indicate and imply the indicated device unless otherwise stated. Or elements must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as a limitation on the protection scope of the present invention: the orientation words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under its device or structure". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood To limit the scope of protection of the present invention.

As shown in the figure, the utility model provides an environment-friendly wet coke quenching system, including: a coke quenching tower 1, a coke quenching car 2, a fixed cover 5, a top water spray device 6 and a dust removal and whitening device; 2. Drive along its track, enter and exit below 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 top of 2 is covered; the dedusting and whitening equipment is connected with the coke quenching tower 1 through pipelines; it is characterized in that:

The quenching car 2 includes: 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 composed of a rear side wall 2-1, two end walls 2-2, and a front side wall 2- 3 and bottom plate 2-6 with open top box structure; the lower part of front side wall 2-3 is provided with focus blocking door 2-4 and water blocking door 2-5; rear side wall 2-1 and bottom plate 2-6 are designed It is a hollow structure, and the hollow structures of the two are connected; the rear part of the rear side wall 2-1 is provided with a water injection port; the upper surface of the bottom plate 2-6 is provided with multiple rows of water gushing ports along the length direction of the vehicle body 2-7;

Coke quenching tower 1 includes: cover holder 1-1, suction port 1-2, air return port 1-3, discharge port 1-4, positive pressure safety flap 1-5, flue gas pressure sensor 1-6 and negative Press the safety flap 1-7; the cover fixing base 1-1 is arranged in the middle position of the coke quenching tower 1, and the fixed cover 5 is fixed on it; the flue gas pressure sensor 1-6 is installed on the upper part of the cover fixing base 1-1 ; The negative pressure safety flap 1-7 is installed 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 suction port 1-2 are arranged from top to bottom On the tower wall of the upper part of the coke quenching tower 1; the positive pressure safety flaps 1-5 are arranged on the inner upper part of the coke quenching tower 1, and the positive pressure safety flaps 1-5 can be turned up;

The lower part of the fixed cover 5 is provided with a movable cover 4, and the movable cover 4 can be moved down to cover the top of the quenching car (2);

Dust removal and whitening equipment includes: venturi dust collector 8, dehydration tower 9, cyclone group dust collector 10, wet electrostatic precipitator 11 and induced draft fan 12; venturi dust collector 8, dehydration tower 9 cyclone group dust collector 10, wet type The electrostatic precipitator 11 and the induced draft fan 12 are connected in sequence through pipelines, the venturi precipitator 8 is connected to the suction 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. connected;

The environment-friendly wet coke quenching system also includes a side water spray device 3; the side water spray device 3 has N spray heads, which are arranged in a line along the length direction of the car body 2-7, and are arranged inside the coke quenching tower 1. Each spray head Each of them is aligned with a water injection port at the rear of the rear side wall 2-1 of the coke quenching car 2; each nozzle is provided with a flow regulating valve 3-1.

The coke quenching tower 1, the dehydration tower 9 and the cyclone group dust collector 10 are all connected with the circulating water tank 15 through the sewage pipeline 14, and the sewage is merged into the circulating water tank 15, and the circulating water tank 15 is sprayed with the side wall through the water purification pipeline 16. The device 3 is connected to provide purified water for spraying.

The interior of the rear side wall 2-1 and the bottom plate 2-6 is provided with a plurality of evenly distributed water baffles 2-6-4 along the length direction of the vehicle body 2-7, and the bottom plate 2-6 is divided into N parallel water channels, Each row of water channels are provided with water injection ports and water gushing ports.

The water spouts include: the upper spout 2-6-1, the middle spout 2-6-2 and the lower spout 2-6-3, which are arranged on each row of water channels on the bottom plate 2-6 from top to bottom, from high to low. The bottom is arranged in the form of the water spout 2-6-2 in the interval between the upper spout 2-6-1 and the lower spout 2-6-3.

An upwardly inclined deflector is set in the water spout to pour the water out from the bottom to the top.

The upper part of the water spout is provided with a raised lining plate, and the coke quenching water pours into the coke 7 from the bottom of the lining plate, and the coke 7 will not fall into the water channel reversely from the water spout.

The positive pressure safety flap 1-5 is set between the suction 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 up. Open, the suction port 1-2 and the return gas port 1-3 are connected, so that the high pressure in the tower is unloaded, and the safety of the coke quenching tower 1 and the flue gas pipeline is ensured.

The negative pressure safety flaps 1-7 are 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 flaps 1-7 can be automatically pushed open by this pressure difference to unload. Further ensure the safety of the coke quenching tower 1 and the flue gas pipeline.

The induced draft fan 12 is driven by a variable frequency motor, and the power supply frequency can be adjusted to control the air volume in real time and indirectly control the pressure in the flue gas pipeline.

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 and the power supply frequency control signal of the induced draft fan motor are interlocked.

The dehydration tower 9 includes: 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. Cooling spray layer 9-3, heat exchange tube layer 9-2 and R-type folded plate dehydration layer 9-1; 9-2-1 is injected, and after heat exchange with the flue gas, it flows out from the lower water outlet 9-2-2, and the hot water turned into hot water can be transported to the place where hot water is needed for reuse; at the same time, the flue gas The moisture in the tube is condensed on the outer wall of the tube to achieve the purpose of whitening the exhaust gas.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that : it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the various embodiments of the present utility model Scope of technical solutions.

Claims (10)

1. An environment-friendly wet quenching system, comprising: the coke quenching device comprises a coke quenching tower (1), a coke quenching car (2), a fixed cover (5), a top water spraying device (6) and dust and white removing equipment; the coke quenching car (2) runs along the track and enters and exits the lower part of the coke quenching tower (1), and a fixed cover (5) and a top water spraying device (6) are arranged in the coke quenching tower (1); the dust and white removing equipment is connected with the coke quenching tower (1) through a pipeline; the method is characterized in that:

the coke quenching car (2) comprises: the coke box comprises a car body (2-7) and a hopper-shaped coke box at the upper part of the car body (2-7); the bucket-shaped coke box is a box-shaped structure with an open top, and the box-shaped structure consists of a rear side wall (2-1), two end walls (2-2), a front side wall (2-3) and a bottom plate (2-6); the lower part of the front side wall (2-3) is provided with a coke-blocking door (2-4) and a water-blocking door (2-5); the rear side wall (2-1) and the bottom plate (2-6) are both designed into hollow structures, and the hollow structures of the rear side wall and the bottom plate are communicated; the rear part of the rear side wall (2-1) is provided with a water filling port; a plurality of rows of water gushing ports are arranged on the upper surface of the bottom plate (2-6) along the length direction of the vehicle body (2-7);

the quenching tower (1) comprises: the device comprises a cover fixing seat (1-1), an air suction port (1-2), an air return port (1-3), a discharge port (1-4), a positive pressure safety turning plate (1-5), a smoke pressure sensor (1-6) and a negative pressure safety turning plate (1-7); the cover fixing seat (1-1) is arranged at the middle position in the coke quenching tower (1), and a fixing cover (5) is fixedly arranged on the cover fixing seat; the smoke pressure sensor (1-6) is arranged at the upper part of the cover fixing seat (1-1); the negative pressure safety turning plate (1-7) is arranged on the side wall of the fixed cover (5), and the negative pressure safety turning plate (1-7) can be opened inwards; the air return port (1-3) and the air suction port (1-2) are arranged on the tower wall at the upper part of the coke quenching tower (1) from top to bottom; the positive pressure safety turning plate (1-5) is arranged at the upper part in the coke quenching tower (1), and the positive pressure safety turning plate (1-5) can be turned upwards;

the lower part of the fixed cover (5) is provided with a movable cover (4), and the movable cover (4) moves downwards to cover the top of the coke quenching car (2);

the dust removal and white elimination equipment comprises: a venturi tube dust remover (8), a dehydration tower (9), a cyclone group dust remover (10), a wet electrostatic dust remover (11) and an induced draft fan (12); the device comprises a venturi tube dust remover (8), a dehydrating tower (9), a cyclone group dust remover (10), a wet electrostatic dust remover (11) and an induced draft fan (12) which are sequentially connected through pipelines, wherein the venturi tube dust remover (8) is communicated with an air suction port (1-2) through a flue gas pipeline (13), and the induced draft fan (12) is communicated with an air return port (1-3) through the flue gas pipeline (13);

the environment-friendly wet quenching system also comprises a side wall water spraying device (3); the side wall water spraying device (3) is provided with N spray heads which are arranged in a line along the length direction of the coke quenching car body (2-7) and arranged in the coke quenching tower (1), and each spray head is respectively aligned with a water injection port at the rear part of the rear side wall (2-1) of the coke quenching car (2); each spray head is provided with a flow regulating valve (3-1).

2. The environment-friendly wet quenching system as claimed in claim 1, wherein the quenching tower (1), the dewatering tower (9) and the cyclone group dust collector (10) are all communicated with a circulating water tank (15) through a sewage pipeline (14) to collect sewage into the circulating water tank (15), and the circulating water tank (15) is connected with the side wall water spray device (3) through a water purification pipeline (16) to provide purified water for water spray.

3. The environment-friendly wet quenching system as claimed in claim 1, wherein a plurality of water-stop plates (2-6-4) are uniformly distributed in the rear side wall (2-1) and the bottom plate (2-6) along the length direction of the car body (2-7), the bottom plate (2-6) is internally divided into N parallel water channels, and each row of water channels is provided with a water injection port and a water gushing port.

4. The environmentally friendly wet quenching system of claim 3, wherein the water flush port comprises: the upper water gushing port (2-6-1), the middle water gushing port (2-6-2) and the lower water gushing port (2-6-3) are arranged on each row of water channels of the bottom plate (2-6) from top to bottom, and the middle water gushing ports (2-6-2) are arranged at intervals from top to bottom according to the form of the upper water gushing port (2-6-1) and the lower water gushing ports (2-6-3).

5. The environment-friendly wet quenching system as claimed in claim 4, wherein an upward inclined deflector is arranged in each water gushing port to guide water to gush from bottom to top; the upper part of the water gushing port is provided with a heightened lining plate, coke quenching water gushes into coke (7) from the lower part of the lining plate, and the coke (7) cannot reversely fall into a water channel from the water gushing port.

6. The environment-friendly wet quenching system as claimed in claim 1, wherein the positive pressure safety flap (1-5) is arranged between the air suction 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 open upwards, the air suction port (1-2) and the air return port (1-3) are communicated, so that the high pressure in the tower is unloaded, and the safety of the quenching tower (1) and a flue gas pipeline is ensured.

7. The environment-friendly wet quenching system as claimed in claim 1, wherein 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 away by the pressure difference to unload, and the safety of the quenching tower (1) and the flue gas pipeline (13) is further ensured.

8. The environment-friendly wet quenching system as claimed in claim 1, wherein the induced draft fan (12) is driven by a variable frequency motor to adjust power supply frequency, so that air volume can be controlled in real time and pressure in the flue gas pipeline can be indirectly controlled.

9. The environment-friendly wet quenching system as claimed in claim 1, wherein the flue gas pressure sensor (1-6) is located between the positive pressure safety turning plate (1-5) and the fixed cover (5), and the collected pressure signal and the power supply frequency control signal of the induced draft fan motor are controlled in an interlocking manner.

10. The environmentally friendly wet quenching system according to claim 1, wherein 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);

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) are sequentially arranged in the dehydration tower (9) from top to bottom;

the heat exchange tube layer (9-2) is formed by bending a stainless steel tube, cold water is injected from a higher water inlet (9-2-1) and flows out from a lower water outlet (9-2-2) after exchanging heat with flue gas.

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