Dust removal device for reducing particulate matters in coke quenching tower

Abstract

The utility model discloses a dust removal device for reducing particulate matters in a quenching tower, which belongs to the technical field of wet quenching dust removal and comprises four stages of serial dust removal structures arranged in the quenching tower from bottom to top in sequence. Comprising a first-stage dust removal device, a second-stage dust removal device, a third-stage dust removal device and a fourth-stage dust removal device, the first-stage dust removal device is arranged above the top of the quenching car and comprises an upper-layer dust removal baffle group, a middle-layer dust removal baffle group and a lower-layer dust removal baffle group, each layer of dust removal baffle group comprises a plurality of dust removal baffles which are arranged in parallel, and each dust removal baffle is fixedly connected with the inner wall of a quenching tower; the third-stage dust removal device comprises a louvered dust removal plate, the fourth-stage dust removal device comprises a water mist spraying system, and the technical problems that an existing coke quenching tower is low in dust removal efficiency, poor in particulate matter stage treatment capacity, insufficient in harmful gas treatment and the like are effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of wet quenching dust removal technology, and in particular relates to a dust removal device for reducing particulate matter in a quenching tower. Background Technology

[0002] Wet quenching is an important process for cooling red-hot coke in coking production. The basic principle of this process is to introduce red-hot coke, which has reached a temperature of over 1000℃ in the carbonization chamber, into the quenching car, and then rapidly cool it with industrial water in the quenching tower, reducing its temperature to below 200℃ to obtain cold coke that meets the requirements.

[0003] Currently, coking plants commonly use baffle-type wooden grid dust collectors installed at the top of the quenching tower to treat the dust-laden vapors generated during the quenching process. These dust collectors, through the principle of baffles, can capture some of the coke dust and water mist generated during quenching.

[0004] However, existing baffle-type wooden grate dust collectors have the following technical problems:

[0005] 1. Low dust removal efficiency, a large number of coke particles cannot be effectively captured, resulting in the direct discharge of dust-laden vapor;

[0006] Second, it cannot classify coke powder particles of different sizes, and the removal effect is particularly poor for fine particles.

[0007] Third, there is a lack of capacity to treat harmful gases in the escaping vapors, such as hydrogen sulfide and carbon monoxide, which cannot be effectively removed.

[0008] In response, this utility model provides a dust removal device for a coke quenching tower that can achieve multi-stage high-efficiency dust removal. Utility Model Content

[0009] The purpose of this invention is to provide a dust removal device for reducing particulate matter in a quenching tower, so as to solve the technical problems mentioned in the background art, such as low dust removal efficiency, poor particulate matter classification and treatment capacity, and insufficient treatment of harmful gases in existing quenching towers.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A dust removal device for reducing particulate matter in a coke quenching tower includes: a four-stage series dust removal structure installed inside the coke quenching tower, wherein the four-stage series dust removal structure is arranged sequentially from bottom to top, including a first-stage dust removal device, a second-stage dust removal device, a third-stage dust removal device and a fourth-stage dust removal device;

[0012] The first-stage dust removal device is located above the top of the coke quenching car and includes three layers of dust removal baffles: upper, middle and lower. Each layer of dust removal baffles includes several parallel dust removal baffles. Each dust removal baffle is fixedly connected to the inner wall of the coke quenching tower. The baffles between two adjacent layers of dust removal baffles are staggered in the horizontal direction.

[0013] The second-stage dust removal device includes several identical corrugated baffles. Both ends of each corrugated baffle are fixedly connected to the inner wall of the quenching tower. Several branch plates are provided on the convex surfaces of the crests and troughs of the corrugated baffles. The acute angle formed between the branch plates and the corrugated baffles faces downward.

[0014] The third-stage dust removal device includes a louvered dust removal plate, which includes an inverted V-shaped frame and several metal blades with adjustable angles. The two ends of the inverted V-shaped frame are fixedly connected to the inner wall of the quenching tower. The metal blades are rotatably arranged inside the inverted V-shaped frame, and several metal blades are arranged in a stepped manner along the inverted V-shaped frame.

[0015] The fourth-stage dust removal device includes a water mist spraying system, which includes a horizontally arranged water mist spraying pipe with several downward-facing nozzles. The water mist spraying pipe is connected to a water tank via a pipeline, and a water pump is installed on the pipeline.

[0016] Preferably, in the first-stage dust removal device, the spacing between adjacent dust removal baffle groups is the same to ensure uniform airflow distribution and improve the settling efficiency of large coke particles.

[0017] Preferably, the corrugated baffles are arranged side by side at intervals along the horizontal direction, and the waveforms of adjacent corrugated baffles are completely corresponding; forming a regular airflow channel, enhancing the impact and settling effect of particles.

[0018] Preferably, the spacing between adjacent metal blades is the same; this ensures uniform airflow and improves the collection efficiency of fine particles.

[0019] Preferably, the nozzles on the water mist spray pipe are arranged along its length to achieve uniform water mist coverage and improve the removal effect of fine particles and harmful gases.

[0020] Preferably, the bottom of the quenching tower is provided with a drainage ditch, which is connected to the sedimentation tank through a pipeline; thereby realizing the effective collection and solid-liquid separation of dusty wastewater.

[0021] Preferably, the sedimentation tank is connected to the water tank via a return water pipeline, and a return water pump is installed on the return water pipeline to realize the recycling of water resources in the system.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] This invention effectively solves the technical problems of low dust removal efficiency, poor particulate matter classification and treatment capacity, and insufficient treatment of harmful gases in existing coke quenching towers by setting up a four-stage series dust removal structure.

[0024] The first-stage dust removal device employs a three-layer staggered arrangement of dust baffles. Through this staggered arrangement and uniform spacing, it effectively captures large coke particles larger than 100 micrometers. The second-stage dust removal device utilizes a special structure of corrugated baffles and their branch plates, combined with the corresponding waveform arrangement of adjacent baffles, to achieve efficient separation of particles between 50 and 100 micrometers. The third-stage dust removal device uses adjustable metal blades arranged in a stepped pattern within an inverted V-shaped frame, with uniform blade spacing, to effectively capture particles in the 10-50 micrometer range. The fourth-stage dust removal device employs a uniformly arranged water mist spray system, which not only removes fine particles smaller than 10 micrometers but also effectively adsorbs harmful gases such as hydrogen sulfide and carbon monoxide. Simultaneously, the inclusion of drainage ditches, sedimentation tanks, and a water return system ensures the recycling of water resources.

[0025] Overall, this invention not only significantly improves dust removal efficiency and enables graded treatment of particles of different sizes, but also has comprehensive advantages such as simple operation, low maintenance cost, and good environmental protection effect, providing reliable technical support for the environmental upgrading and transformation of coking enterprises. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0027] In the diagram: 1. Quenching tower; 2. Quenching car; 3. Dust removal baffle; 4. Corrugated barrier plate; 5. Louvered dust removal plate; 6. Water mist spray pipe; 7. Water pump; 8. Water tank; 9. Drainage ditch; 10. Sedimentation tank. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] like Figure 1 As shown:

[0030] During the wet quenching process, a large amount of dust-laden vapor is generated when high-temperature coke comes into contact with cooling water. The composition of these vapors is quite complex, mainly consisting of solid, gaseous, and liquid substances.

[0031] In terms of solid particulate matter, it mainly includes coke dust of different sizes, with a wide range of particle sizes, from large visible particles to fine particles. In addition, it also includes carbonaceous material that is mechanically shed from the surface of the coke during the cooling process, as well as various mineral particles.

[0032] In terms of gaseous substances, water vapor is the most important component. In addition, it contains various harmful gases, such as hydrogen sulfide and carbon monoxide. Under high-temperature conditions, certain substances in coke will volatilize, forming various volatile organic compounds.

[0033] The liquid substances are mainly water droplets and droplets containing tar. These droplets are suspended in the vapor and may carry other substances. At the same time, the vapor also contains a variety of harmful substances, including polycyclic aromatic hydrocarbons, phenolic compounds, cyanides, and various sulfides.

[0034] These components mainly originate from several sources: first, water vapor generated from direct contact between high-temperature coke and cooling water; second, dust generated from mechanical peeling off the surface of coke during the cooling process; third, the volatilization or decomposition of residual substances in coke under high-temperature conditions; and fourth, various gases generated from the chemical reaction between coke and water.

[0035] Because of the complex composition of dust-laden vapors, multi-stage dust removal facilities are required for their treatment. These facilities must remove solid particles of varying sizes and handle different types of harmful gases to ensure compliance with environmental protection requirements. This is why multi-stage, series-connected dust removal systems are necessary for comprehensive and effective pollutant control.

[0036] To address this, this embodiment proposes a dust removal device for reducing particulate matter in a quenching tower, comprising:

[0037] The four-stage series dust removal structure is installed inside the quenching tower 1. The four-stage series dust removal structure is arranged from bottom to top and includes a first-stage dust removal device, a second-stage dust removal device, a third-stage dust removal device and a fourth-stage dust removal device.

[0038] The first-stage dust removal device is located above the top of the coke quenching car 2. The first-stage dust removal device includes three layers of dust removal baffles: upper, middle and lower. Each layer of dust removal baffles includes several parallel dust removal baffles 3. Each dust removal baffle 3 is fixedly connected to the inner wall of the coke quenching tower 1. The baffles between two adjacent layers of dust removal baffles are staggered in the horizontal direction, and the distance between adjacent dust removal baffles is the same.

[0039] The first-stage dust removal system is mainly used to treat large particles of coke dust. The dust collector baffles (3) employ a three-layer staggered arrangement. When dust-laden vapor flows through, larger particles, due to their greater mass, cannot be redirected by the airflow and directly impact the baffles, achieving separation. This stage primarily handles large particles larger than 100 micrometers, providing preliminary coarse dust removal.

[0040] The second-stage dust removal device is installed above the first-stage dust removal device and includes several identical corrugated baffles 4, wherein: both ends of each corrugated baffle 4 are fixedly connected to the inner wall of the quenching tower 1, and several corrugated baffles 4 are arranged side by side at intervals in the horizontal direction, and the waveforms of adjacent corrugated baffles 4 are completely corresponding; several branch plates are provided on the convex surfaces of the crests and troughs of the corrugated baffles 4, and the acute angle formed between the branch plates and the corrugated baffles 4 faces downward.

[0041] The second-stage dust removal device is mainly used to filter out the remaining large particles and most of the medium-sized coke dust. By alternating corrugated baffles 4 and branch plates, the airflow direction is changed, and the principle of inertial separation is used to separate and settle particles of approximately 50-100 micrometers after impacting the baffles. After these two stages of dust removal, the large particles and the majority of the medium-sized coke dust are essentially blocked and fall to the bottom of the quenching tower 1.

[0042] The third-stage dust removal device is located above the second-stage dust removal device and includes a louvered dust removal plate 5. The louvered dust removal plate 5 includes an inverted V-shaped frame and several metal blades with adjustable angles. The two ends of the inverted V-shaped frame are fixedly connected to the inner wall of the quenching tower 1. The metal blades are rotatably arranged inside the inverted V-shaped frame. Several metal blades are arranged in a stepped manner along the inverted V-shaped frame. The spacing between adjacent metal blades is the same. The tilt angle of the metal blades is adjustable to change the direction of steam flow.

[0043] The third-stage dust removal device is mainly used to filter out the remaining medium-sized particles and floating small coke dust particles. By changing the number, spacing, and angle of the metal blades, the airflow direction is altered, causing coke dust particles in the 10-50 micrometer range to separate and settle after impacting the blades.

[0044] The fourth-stage dust removal device is located above the third-stage dust removal device and includes a water mist spraying system. The water mist spraying system includes a horizontally arranged water mist spraying pipe 6. Several nozzles with downward-facing outlets are arranged along the length of the water mist spraying pipe 6. The water mist spraying pipe 6 is connected to a water tank 8 through a pipeline, and a water pump 7 is installed on the pipeline.

[0045] The fourth-stage dust removal device uses continuous spraying of atomized water to quickly adsorb fine coke particles and harmful impurities remaining in the steam. It can handle not only fine coke particles smaller than 10 micrometers, but also remove harmful gases such as hydrogen sulfide and carbon monoxide through the adsorption and condensation of the water mist. It can also treat harmful substances such as phenols and cyanides. The sprayed fine water mist can capture extremely fine dust, absorb harmful gases, and the cooling effect of the water mist can also cause some of the steam to condense.

[0046] The bottom of the quenching tower 1 is equipped with a drainage ditch 9, which is connected to a sedimentation tank 10 via a pipeline. The sedimentation tank 10 is connected to a water tank 8 via a return water pipeline, and a return water pump is installed on the return water pipeline. The continuously collected dust-laden water flows from the drainage ditch 9 into the sedimentation tank 10 for sedimentation. The settled coke dust is periodically scooped out and sent to the coke powder storage for recycling. The treated water can be pumped back to the water tank 8 and reused in the water mist spraying system of the fourth-stage dust removal device, thereby realizing the recycling of water resources.

[0047] Working principle:

[0048] During operation, the dust-laden airflow first encounters the first-stage dust removal device located above the top of the coke quenching car 2 within the quenching tower 1. As the airflow passes through the upper, middle, and lower layers of dust removal baffles 3, the airflow is forced to change direction due to the horizontally staggered arrangement of these baffles 3. At this point, large coke particles larger than 100 micrometers in the airflow, due to their greater mass, cannot quickly change direction with the airflow and directly collide with the staggered dust removal baffles 3, losing kinetic energy and settling away.

[0049] The rising airflow then reaches the second-stage dust removal device, where it encounters several corrugated baffles 4. As the airflow flows along the surface of the corrugated baffles 4, it not only has to constantly change direction with the undulations of the waves, but also has to bypass the branch plates set on the convex surfaces of the wave crests and troughs. These branch plates form a downward acute angle with the corrugated baffles 4, forcing the airflow to undergo complex turning motions. During this process, medium-sized particles of 50-100 micrometers in the airflow, due to inertia, cannot flexibly change direction with the airflow and are separated and settled after colliding with the corrugated baffles 4 and the branch plates.

[0050] The rising airflow then enters the third-stage dust removal device, where it encounters several adjustable-angle metal blades installed within an inverted V-shaped frame. Because these metal blades are arranged in a stepped pattern, the airflow is forced to zigzag between adjacent blades. During this process, the airflow direction is altered by the metal blades, causing coke particles in the 10-50 micrometer range to collide with the metal blade surface and the wall of the quenching tower 1, gradually losing kinetic energy and settling, as they cannot keep up with the airflow's direction.

[0051] Finally, the remaining airflow reaches the fourth-stage dust removal device, where it encounters the fine water mist generated by the water mist spray system. Ultrafine particles smaller than 10 micrometers in the airflow come into full contact with the water mist and are captured by the water droplets under surface tension. Simultaneously, harmful gases (such as hydrogen sulfide and carbon monoxide) and harmful substances (such as phenols and cyanides) in the airflow are also adsorbed by the water mist. Furthermore, the cooling effect of the water mist causes some of the vapor in the airflow to condense.

[0052] After passing through four stages of dust removal, the airflow is basically purified, while the separated coke powder forms dust-laden water along with the cooling water. This water flows into the sedimentation tank 10 through the drainage ditch 9 at the bottom of the quenching tower 1, where solid-liquid separation is finally achieved. The coke powder is periodically scooped out and sent to the coke powder storage for recycling and reuse. The clear water that has undergone sedimentation treatment can be pumped back into the water tank 8 and reused in the water mist spraying system of the fourth-stage dust removal device.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust removal device for reducing particulate matter in a coke quenching tower, characterized in that, include: The four-stage series dust removal structure is installed inside the coke quenching tower (1). The four-stage series dust removal structure includes, from bottom to top, a first-stage dust removal device, a second-stage dust removal device, a third-stage dust removal device and a fourth-stage dust removal device. The first-stage dust removal device is located above the top of the coke quenching car (2), and includes three layers of dust removal baffles: upper, middle and lower. Each layer of dust removal baffles includes several parallel dust removal baffles (3). Each dust removal baffle (3) is fixedly connected to the inner wall of the coke quenching tower (1). The baffles between two adjacent layers of dust removal baffles are staggered in the horizontal direction. The second-stage dust removal device includes several identical corrugated baffles (4). Both ends of each corrugated baffle (4) are fixedly connected to the inner wall of the quenching tower (1). Several branch plates are provided on the convex surfaces of the crests and troughs of the corrugated baffles (4). The acute angle formed between the branch plates and the corrugated baffles (4) faces downward. The third-stage dust removal device includes a louvered dust removal plate (5), which includes an inverted V-shaped frame and several metal blades with adjustable angles. The two ends of the inverted V-shaped frame are fixedly connected to the inner wall of the quenching tower (1). The metal blades are rotatably arranged in the inverted V-shaped frame, and several metal blades are arranged in a stepped manner along the inverted V-shaped frame. The fourth-stage dust removal device includes a water mist spraying system, which includes a horizontally arranged water mist spraying pipe (6). The water mist spraying pipe (6) is provided with several nozzles with downward-facing outlets. The water mist spraying pipe (6) is connected to a water tank (8) through a pipeline, and a water pump (7) is provided on the pipeline.

2. The dust removal device for reducing particulate matter in a quenching tower according to claim 1, characterized in that, In the first-stage dust removal device, the spacing between adjacent dust removal baffle groups is the same.

3. The dust removal device for reducing particulate matter in a quenching tower according to claim 1, characterized in that, The wave-shaped barrier plates (4) are arranged side by side at intervals along the horizontal direction, and the waveforms of adjacent wave-shaped barrier plates (4) are completely corresponding.

4. The dust removal device for reducing particulate matter in a quenching tower according to claim 1, characterized in that, The spacing between adjacent metal blades is the same.

5. The dust removal device for reducing particulate matter in a quenching tower according to claim 1, characterized in that, The nozzles on the water mist spray pipe (6) are arranged along its length.

6. The dust removal device for reducing particulate matter in a quenching tower according to claim 1, characterized in that, The bottom of the quenching tower (1) is provided with a drainage ditch (9), which is connected to the sedimentation tank (10) through a pipeline.

7. The dust removal device for reducing particulate matter in a quenching tower according to claim 6, characterized in that, The sedimentation tank (10) is connected to the water tank (8) through a return water pipeline, and a return water pump is installed on the return water pipeline.

Images