Dust treatment equipment of coal conveying system

Abstract

The utility model discloses dust treatment equipment of a coal conveying system, which belongs to the technical field of dust treatment and comprises a gas collection pipeline, a water bath dust removal chamber, a sedimentation dust removal chamber, a sinter plate dust removal chamber and a gas purification chamber, an outlet of the gas purification chamber is connected with an input end of a smoke exhaust pipeline, and an induced draft fan is arranged in the smoke exhaust pipeline; the output tail end of the gas collection pipeline is connected with a flow equalizing plate in the water bath dust removal chamber, a bottom turbulent flow layer, a streaming layer and a top turbulent flow layer are arranged in the sedimentation dust removal chamber, the streaming layer is formed by Y-shaped streaming elements in a matrix distribution mode, one end of a turbulent flow pipe is open, and the other end of the turbulent flow pipe is connected with an induced draft fan; the sinter plate dust removal chamber is used for further treating the gas treated by the water bath dust removal chamber and the sedimentation dust removal chamber; the flow layer enhances the agglomeration of coal dust gas and water turbulence and the phase change agglomeration of water vapor, and ensures that the airflow is uniformly distributed in the dust removal equipment, so that the dust filtering strength borne by each sinter plate is roughly the same, the dust removal efficiency of the sinter plate is improved, and the service life of the sinter plate is prolonged.

Description

Technical Field

[0001] The utility model relates to dust processing equipment for a coal conveying system, belonging to the technical field of dust processing. Background Art

[0002] Two types of dust removal equipment are currently widely used in coal conveying systems: bag filters and wet dust collectors. Currently, due to coal costs and operational pressures, thermal power generation companies generally choose to blend low-quality coal, with Indonesian coal being the most common type. Indonesian coal has a high moisture content, high volatile matter content, and small dust particles, making it difficult to settle. Both traditional dust removal systems have significant drawbacks when dealing with Indonesian coal dust. Bag filters are prone to sticking when exposed to damp, high-dust particles, resulting in ineffective dust collection and significantly increased maintenance costs. Small coal dust particles are compact, have a large surface area, and have a weak adhesion, making wet dust collectors ineffective. Utility Model Content

[0003] Aiming at the above problems existing in the prior art, the utility model provides a dust treatment device for a coal conveying system, which solves the problem of poor dust removal effect of the coal conveying system in the prior art.

[0004] The purpose of the utility model is achieved through the following technical solutions: a coal conveying system dust treatment equipment, including a gas collection pipeline, a water bath dust removal chamber, a sedimentation dust removal chamber, a plastic burning plate dust removal chamber, a clean air chamber, a smoke exhaust pipeline, and an induced draft fan. The water bath dust removal chamber, the sedimentation dust removal chamber, the plastic burning plate dust removal chamber, and the clean air chamber are arranged in sequence from bottom to top. The outlet of the clean air chamber is connected to the input end of the smoke exhaust pipeline, and an induced draft fan is provided inside the smoke exhaust pipeline; the gas collection pipeline is used to collect the coal dust gas to be treated, and the output end of the gas collection pipeline is connected to the input end of the smoke exhaust pipeline. The input end of the water bath dust removal chamber is connected, and a flow equalizing plate is provided in the water bath dust removal chamber. The output end of the air collecting pipe is connected to the flow equalizing plate. A spoiler layer and a flow bypass layer are provided in the sedimentation dust removal chamber. The spoiler layer includes a bottom spoiler layer and a top spoiler layer. The flow bypass layer is arranged between the bottom spoiler layer and the top spoiler layer. The flow bypass layer is composed of "Y"-shaped flow bypass particles in a matrix distribution manner. One end of the spoiler layer is an opening, and the other end of the spoiler layer is connected to an induced draft fan. The induced draft fan provides a power source for the air to be introduced into the spoiler layer.

[0005] The sintered plate dust removal chamber further processes the gas processed by the water bath dust removal chamber and the sedimentation dust removal chamber, and the clean gas chamber is used to discharge the clean gas.

[0006] Furthermore, a swirl plate is provided at the output end of the gas collecting pipe, and the swirl plate is located below the flow balancing plate.

[0007] Furthermore, the gas collecting pipe is divided into two routes, each of which is provided with two outlets, and the swirl plates of the two outlets of the same route rotate in opposite directions. The provision of swirl plates can increase the gas-liquid contact area, and the swirl plates make the flue gas have a certain rotational momentum after entering the water bath dust removal chamber, thereby increasing the disturbance. After the airflow rotates and enters below the liquid surface, the gas-liquid mixed liquid level increases, which is beneficial to the capture of particulate matter in the dust-laden airflow. After the airflow rotates and disperses radially, the airflow velocity decreases and the coverage area increases, which is beneficial to the uniformity of the flow field in the water bath dust removal chamber and can improve the dust removal efficiency of the plastic sintering plate on particulate matter. In addition, the swirl plates of the same route make the direction of the flue gas rotation adopt a combination of clockwise and counterclockwise, which plays a role in turbulent agglomeration, increases the turbulence of the gas when it moves upward, and the airflow rises. The process is accompanied by rotational motion. The rotation directions of adjacent air flows are inconsistent, which play a role in derotation and promote the vertical rise of the overall airflow. The inconsistent rotation directions of adjacent air flows increase the relative flow velocity in the airflow contact area, and promote the mutual collision between particulate matter in the airflow and droplets entrained in the liquid. The mutual collision between particles (dust + dust, dust + droplets, droplets + droplets) in a high humidity environment will lead to collision and agglomeration, making the particle size larger and the inertial force stronger. When the overall airflow velocity decreases, it is easier to fall through gravity sedimentation, thereby improving the dust removal efficiency and reducing the carryover of droplets.

[0008] Furthermore, the flow balancing plate is a grid plate.

[0009] Furthermore, the bottom spoiler layer or the top spoiler layer is arranged in sequence using a plurality of spoiler tubes, each of which is a hollow metal tube, one end of which is open, and the other end of which is connected to a main tube, which is connected to an induced draft fan.

[0010] Furthermore, the spacing between the spoiler tubes is 20 mm, and the diameter of the spoiler tube is 20 mm.

[0011] Furthermore, the arrangement direction of the spoiler tubes of the bottom spoiler layer is perpendicular to the arrangement direction of the spoiler tubes of the top spoiler layer.

[0012] Furthermore, the bottom spacing of the "Y"-shaped windings in the transverse direction of the winding layer is 100 mm, the top spacing thereof is 40 mm, and the spacing between the "Y"-shaped windings in the longitudinal direction of the winding layer is 50 mm.

[0013] Furthermore, the specifications of the "Y"-shaped flow rotor are: height 150mm, width 60mm, thickness 100mm, and top opening angle 60°. A sedimentation dust removal chamber is set between the water bath dust removal chamber and the sintered plate dust removal chamber. The spoiler tube adopts a hollow metal tube, and air can pass into the interior. The power adopts the tail induced draft fan, and two layers of spoiler layers are arranged, and a flow layer is set in between. The arrangement of the bottom spoiler layer plays a role of de-rotation and homogenization process to a certain extent, which is beneficial to the uniformity of flue gas flow. The addition of flow layers between the spoiler layers is beneficial to the turbulence of the local airflow, especially the mixing zone at the tail of the "Y"-shaped flow rotor, which has a large turbulence, further promoting the collision and aggregation between particles (dust + dust, dust + droplets, droplets + droplets), increasing the particle size and inertia of the particles, and promoting the gravity sedimentation of the particles. The setting of the top spoiler layer further homogenizes the airflow field and makes the airflow rise evenly, which is beneficial to the dust removal of the dust-laden airflow by the plastic sintering plate. Air is introduced into the spoiler tubes and extracted by the tail induced draft fan, which can cool the dust-laden airflow. Since the humidity of the dust-laden airflow increases after being washed with water, its relative humidity can be further increased after cooling, and can reach an oversaturated state. The particles in the near-wall area of the spoiler tube can grow through condensation of water vapor and then be deposited on the spoiler tube. When the airflow containing particles (dust, liquid droplets) collides and grows under the action of the flow particles and falls, it will pass through the bottom spoiler tube, which can flush the particles on the wall of the spoiler tube and play a self-cleaning role.

[0014] The utility model has the following beneficial effects: the utility model designs gas flow equalization and turbulence equipment, which mainly includes a swirl plate, a flow equalization plate in a water bath dust removal chamber, a turbulence layer and a circumferential flow layer in a sedimentation dust removal chamber. This improvement helps to greatly improve the flow of dust gas in the equipment, enhance the mixing strength of dust and water, improve the dust removal effect, and at the same time avoid the occurrence of uneven output between the plastic sintering plates.

[0015] The utility model provides a dust treatment device for a coal conveying system, which enhances the turbulent agglomeration of coal dust gas and water and the phase change agglomeration of water vapor, and at the same time ensures that the airflow is evenly distributed in the dust removal equipment, so that the dust filtration intensity borne by each plastic-fired plate is roughly the same, thereby improving the dust removal efficiency and service life of the plastic-fired plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the dust treatment equipment of the coal conveying system of the utility model;

[0017] Figure 2 This is a cross-sectional view of the dust handling equipment of the coal conveying system;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 Schematic diagram of the structure of the bottom spoiler layer;

[0020] Figure 5 Schematic diagram of the structure of the flow layer;

[0021] Figure 6 Schematic diagram of the structure of the "Y" type vortex carrier;

[0022] Figure 7 Schematic diagram of the structure of the top spoiler layer;

[0023] Figure 8 This is a schematic diagram of the airflow direction of the dust handling equipment of the coal conveying system of the present invention.

[0024] In the figure: 1. Gas collecting pipe; 2. Outlet; 3. Water bath dust removal chamber; 4. Flow equalizing plate; 5. Swirl plate; 6. Sedimentation dust removal chamber; 7. Bottom turbulence layer; 8. Flow spoiler; 9. Top turbulence layer; 10. Flow around layer; 11. "Y" type vortex; 12. Plastic sintered plate dust removal chamber; 13. Clean air chamber; 14. Smoke exhaust duct; 15. Main pipe. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and accompanying descriptions.

[0026] like Figure 1-8 As shown, a dust treatment device for a coal transportation system includes a gas collection pipe 1, a water bath dust removal chamber 3, a sedimentation dust removal chamber 6, a plastic sintering plate dust removal chamber 12, a clean air chamber 13, a smoke exhaust pipe 14, and an induced draft fan. The water bath dust removal chamber 3, the sedimentation dust removal chamber 6, the plastic sintering plate dust removal chamber 12, and the clean air chamber 13 are arranged in order from bottom to top. The outlet of the clean air chamber 13 is connected to the input end of the smoke exhaust pipe 14. An induced draft fan is arranged in the middle of the smoke exhaust pipe 14 to provide power for the flow of coal dust gas, the flow of air in the turbulent pipe, and the discharge of clean gas.

[0027] The gas collecting pipe 1 is used to collect the coal dust gas to be treated. The output end of the gas collecting pipe 1 is connected to the input end of the water bath dust removal chamber 3. The gas collecting pipe is divided into two paths, each of which is provided with two outlets 2. The coal dust gas enters the water bath dust removal chamber 3 through the outlet 2. Each outlet 2 is provided with a swirl plate 5. The power for the coal dust gas to pass through the swirl plate 5 comes from the induced draft fan in the middle section of the smoke exhaust pipe 14, and the swirl plate 5 is located below the flow equalizing plate 4 in the water bath dust removal chamber 3. The swirl plates 5 of the two outlets 2 of the same path rotate in opposite directions. In this embodiment, the flow equalizing plate 4 is a grid plate.

[0028] The sedimentation dust removal chamber 6 is provided with a spoiler layer and a flow-around layer 10, the spoiler layer includes a bottom spoiler layer 7 and a top spoiler layer 9, the flow-around layer 10 is arranged between the bottom spoiler layer 7 and the top spoiler layer 9, the bottom spoiler layer 7 or the top spoiler layer 9 adopts a plurality of spoiler tubes 8 arranged in sequence, the spoiler tube 8 is a hollow metal tube, air can be passed into the interior, the power comes from the induced draft fan in the middle of the smoke exhaust duct 14, one end of the spoiler tube 8 is open, and the other end is connected to the main tube 15, the main tube 15 is connected to the induced draft fan, the bottom spoiler layer 7 adopts a spoiler tube 8 with a diameter of 20 mm arranged horizontally, and the spacing between the spoiler tubes 8 is 20 mm. The spacing is 20mm, and the top spoiler layer 9 adopts spoiler tubes 8 with a diameter of 20mm arranged longitudinally. The spacing between the spoiler tubes 8 is 20mm. With the help of the negative pressure formed, the atmosphere is collected to the main pipe 15 through the spoiler tube 8 and further enters the inlet of the induced draft fan. The atmosphere is used to cool the air flow inside the sedimentation dust removal chamber 6, that is, in a high humidity environment, the humidity of the air flow is increased to supersaturation by cooling. Through the heterogeneous condensation phase change of water vapor, the particles are promoted to condense and grow after the reaction with water vapor, and then fall to the dust collection area by gravity sedimentation; the vortex layer 10 is composed of "Y"-shaped vortex elements 11 in a matrix distribution. The Y-shaped stators 11 in the transverse direction of the flow layer 10 have a bottom spacing of 100 mm and a top spacing of 40 mm. The Y-shaped stators 11 in the longitudinal direction of the flow layer 10 are spaced 50 mm apart. The specifications of the Y-shaped stators 11 are: height 150 mm, width 60 mm, thickness 100 mm, and a top opening angle of 60°. The flow layer 10 is used to increase the local turbulence of the flue gas. Under higher turbulence, it strengthens the collision and coalescence between particles / droplets in the gas, promotes the interaction of small particles to form large particles, and then leaves the main gas phase through gravity sedimentation and falls into the dust collection area at the bottom.

[0029] In another embodiment, the clean air chamber 13 is used to discharge clean gas. The clean air chamber 13 can be divided into multiple small clean air chambers and switched on and off by a lifting valve. The lifting valve is closed each time soot is blown to ensure that all compressed air can enter the plastic sintering plate.

[0030] In another embodiment, the plastic-fired plate dust removal chamber 12 is equipped with a pulse soot blowing system, which includes a compressed air pipeline, a pulse solenoid valve, and a blowpipe nozzle. The pulse soot blowing system is arranged above the plastic-fired plate dust removal chamber 12. The compressed air is controlled by the pulse solenoid valve and is sprayed into the plastic-fired plate filter element chamber at regular intervals to remove the dust attached to the surface of the plastic-fired plate filter element, thereby ensuring its dust removal effect and preventing dust removal failure.

[0031] Working principle: Under the action of the fan, the coal dust gas to be treated first passes through the gas collecting pipe 1 and enters the water bath dust removal chamber 3. A swirl plate 5 is provided at the output end outlet of the gas collecting pipe 1. The swirl plate 5 can make the coal dust gas have a certain rotational momentum after entering the dust collector, thereby increasing the disturbance. After the airflow rotates, it enters the water bath dust removal chamber 3 below the water surface, where the gas-liquid mixing area increases, thereby capturing the particles in the dust-laden airflow; after the airflow rotates and disperses radially, the airflow velocity decreases and the coverage area increases, thereby making the flow field in the dust collector uniform. In addition, the swirl plate 5 adopts a combination of clockwise and counterclockwise rotations to increase the turbulence of the gas when it moves upward, thereby playing a role in Turbulent agglomeration: The upward process of airflow is accompanied by rotation. The rotation directions of adjacent airflows are inconsistent, which has a derotation effect on each other and promotes the vertical rise of the overall airflow. The inconsistent rotation directions of adjacent airflows increase the relative flow velocity in the airflow contact area, promoting the mutual collision between particles in the airflow and droplets sucked in the liquid. The mutual collision between particles (dust + dust, dust + droplets, droplets + droplets) in a high-humidity environment will lead to collision and agglomeration, making the particle size larger and the inertial force stronger. When the overall airflow speed decreases, the particles fall by gravity, thereby improving the dust removal efficiency and reducing the carryover of droplets.

[0032] After removing large-particle dust in the water bath dust removal chamber 3, the coal dust gas continues to move upward through the equalizing plate 4 and enters the sedimentation dust removal chamber 6. The arrangement of the bottom spoiler layer 7 plays the role of de-rotation and homogenizing the flow field, making the flue gas flow uniform; the addition of the flow layer 10 between the spoiler layers increases the turbulence of the local airflow, and the mixing zone at the tail of the "Y"-shaped spoiler 11 has a larger turbulence, which further promotes the collision and aggregation between particles (dust + dust, dust + droplets, droplets + droplets), increases the particle size and inertia force of the particles, and promotes the gravity sedimentation of the particles; the setting of the top spoiler layer 9 homogenizes the airflow field, makes the airflow rise evenly, and facilitates the dust removal of the dust-laden airflow by the plastic sintering plate; air is introduced between the spoiler layers and extracted by the tail induced draft fan, which has a cooling effect on the dust-laden airflow. Because the dust-laden airflow increases in humidity after water washing, cooling further increases its relative humidity, potentially reaching a supersaturated state. Particles near the walls of the spoiler tube 8 can condense and grow through water vapor, ultimately settling on the tube. As the particle-laden (dust, liquid droplets) airflow collides with and grows under the influence of the Y-shaped flow guides 11 and falls, it passes through the bottom spoiler layer 7, which flushes particles deposited on the walls of the spoiler tube 8, thus achieving a self-cleaning effect.

[0033] The coal dust gas that has passed through the sedimentation dust removal chamber 6 continues to move upward under the action of the induced draft fan and eventually enters the plastic-sintered board dust removal chamber 12. Here, it undergoes fine dust removal through the plastic-sintered board filter material, and the clean gas enters the top clean air chamber and is discharged. During the operation of the equipment, the compressed air enters the pulse valve through the gas storage tank, and then the blowing pipe and nozzle blow the plastic-sintered board to remove the dust on the surface of the plastic-sintered board.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made to the above embodiment based on the technical essence of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A dust treatment device for a coal conveying system, characterized in that: The invention comprises an air collecting pipe (1), a water bath dust removal chamber (3), a sedimentation dust removal chamber (6), a plastic sintering plate dust removal chamber (12), a clean air chamber (13), a smoke exhaust pipe (14), and an induced draft fan. The water bath dust removal chamber (3), the sedimentation dust removal chamber (6), the plastic sintering plate dust removal chamber (12), and the clean air chamber (13) are arranged in sequence from bottom to top. The outlet of the clean air chamber (13) is connected to the input end of the smoke exhaust pipe (14), and the smoke exhaust pipe (14) is provided with an induced draft fan inside. The gas collecting pipe (1) is used to collect the coal dust gas to be processed. The output end of the gas collecting pipe (1) is connected to the input end of the water bath dust removal chamber (3). The water bath dust removal chamber (3) is provided with a flow averaging plate (4). The output end of the gas collecting pipe (1) is connected to the flow averaging plate (4). The sedimentation dust removal chamber (6) is provided with a flow disturbance layer and a flow bypass layer (10). The flow disturbance layer includes a bottom flow disturbance layer (7) and a top flow disturbance layer (9). The flow bypass layer (10) is provided at the bottom. Between the lower spoiler layer (7) and the top spoiler layer (9), the vortex layer (10) is composed of "Y"-shaped vortex rollers (11) distributed in a matrix manner. One end of the spoiler layer is open, and the other end of the spoiler layer is connected to an induced draft fan, which provides a power source for the air to be introduced into the spoiler layer. The plastic sintering plate dust removal chamber (12) further processes the gas processed by the water bath dust removal chamber (3) and the sedimentation dust removal chamber (6), and the clean air chamber (13) is used to discharge the clean gas.

2. The dust treatment equipment for the coal transportation system according to claim 1, characterized in that: A swirl plate (5) is provided at the output end of the gas collecting pipe (1), and the swirl plate (5) is located below the flow averaging plate (4).

3. The dust treatment equipment of the coal transportation system according to claim 2, characterized in that: The gas collecting pipeline (1) is divided into two paths, each path is provided with two outlets (2), and the swirl plates (5) of the two outlets (2) of the same path rotate in opposite directions.

4. The dust treatment equipment for the coal transportation system according to claim 1, characterized in that: The flow balancing plate (4) is a grid plate.

5. The dust treatment equipment for the coal transportation system according to claim 1, characterized in that: The bottom spoiler layer (7) or the top spoiler layer (9) is provided with a plurality of spoiler tubes (8) arranged in sequence, wherein the spoiler tubes (8) are hollow metal tubes, one end of the spoiler tubes (8) is open, and the other end of the spoiler tubes (8) is connected to a main tube (15), and the main tube (15) is connected to an induced draft fan.

6. The dust treatment equipment for the coal transportation system according to claim 5, characterized in that: The spacing between the spoiler tubes (8) is 20 mm, and the diameter of the spoiler tubes (8) is 20 mm.

7. The dust treatment equipment for the coal transportation system according to claim 5, characterized in that: The arrangement direction of the spoiler tubes (8) of the bottom spoiler layer (7) is perpendicular to the arrangement direction of the spoiler tubes of the top spoiler layer (9).

8. The dust treatment equipment for the coal transportation system according to claim 1, characterized in that: The bottom spacing of the "Y"-shaped windings (11) in the transverse direction of the winding layer (10) is 100 mm, the top spacing thereof is 40 mm, and the spacing between the "Y"-shaped windings (11) in the longitudinal direction of the winding layer (10) is 50 mm.

9. The dust treatment equipment for the coal transportation system according to claim 1, characterized in that: The specifications of the "Y"-shaped winding (11) are: height 150 mm, width 60 mm, thickness 100 mm, and top opening angle 60°.

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