Smoke dust treatment device between rolling mills of steel rolling production line
By designing a multi-stage dust removal system and a blower cleaning device in the steel rolling production line, the problem of reduced dust removal efficiency caused by dust adhesion was solved, achieving efficient dust control and cost control.
Patent Information
- Application Number
- CN202422332144.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The existing smoke dust control device in the rolling mill room of the steel rolling production line has the problem that smoke dust easily adheres to the filter bags, resulting in a decrease in dust removal efficiency and increased operating costs due to frequent replacement of filter bags.
A device comprising multiple dust hoods, a dust collector, and plate filter elements was designed. It utilizes gravity and centrifugal force of airflow to separate dust particles and cleans the plate filter elements through a blowpipe, thereby reducing clogging and lowering operating costs.
It improves the purification efficiency of smoke and dust, reduces the replacement frequency of plate filter elements, reduces operating costs, and achieves significant dust removal effect.
Smart Images
Figure CN223474679U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of steel rolling production equipment, specifically relating to a dust control device for the mill room of a steel rolling production line. Background Art
[0002] During the finishing rolling process of wire rod in the steel mill's rolling workshop, a large amount of detached iron oxide powder, cooling water vapor, and combustion ash from lubricating oil are generated, producing a large amount of harmful smoke and dust between the mill stands. The main components of the smoke are FeO, Fe2O3, H2O, and oil fumes. In order to reduce and eliminate the pollution of these harmful substances to the environment and improve operating conditions, a smoke and dust removal system is installed in the finishing mill stands to ensure that all the smoke generated by the mill is drawn into a closed smoke hood and purified by a bag filter. Currently, the dust control equipment used in steel mill rolling mill workshops mainly consists of dust hoods, manual regulating valves, ducts, bag filters, fans, and exhaust chimneys. When this equipment purifies the dust in the rolling mill workshop, the dust easily adheres to the filter bags. Even with pulse jet cleaning, the dust adhering to the filter bags cannot be effectively cleaned. Over time, this severely impacts dust removal efficiency, necessitating timely replacement of the filter bags, which increases operating costs. Therefore, developing a dust control device for steel rolling production lines with a reasonable structure, low operating costs, and significant dust removal effect is objectively necessary. Summary of the Invention
[0003] The purpose of this utility model is to provide a dust control device for the rolling mill room of a steel rolling production line with reasonable structure, low operating cost, and significant dust removal effect.
[0004] The purpose of this utility model is achieved as follows: it includes multiple dust collection hoods and a dust collector connected to the dust collection hoods. A middle partition is vertically installed inside the dust collector, dividing the inner cavity of the dust collector into a primary dust collection chamber and a secondary dust collection chamber. A connecting hole is provided at the upper part of the middle partition. A dust hopper is provided at the bottom of both the primary and secondary dust collection chambers, and a screw conveyor is provided at the bottom of the dust hopper. A primary dust collection assembly is installed inside the primary dust collection chamber. A sealing door is provided on the side wall of the secondary dust collection chamber. A secondary dust collection assembly is installed inside the secondary dust collection chamber. The secondary dust collection assembly includes an upper support base and a lower support base arranged symmetrically. Multiple sets of plate filter elements are installed at equal intervals on the upper and lower support bases. A blowpipe is provided on one side of each plate filter element. A translation mechanism connected to the blowpipe is provided in the secondary dust collection chamber above the upper support base. An exhaust pipe is provided at the top of the secondary dust collection chamber, and a silencer and a waste heat recovery device are sequentially installed on the exhaust pipe.
[0005] Compared with existing technologies, the advantages of this device are as follows: Firstly, the primary dust removal chamber enables preliminary dust removal of the flue gas flow. After the flue gas enters the primary dust collector chamber, the primary dust removal components can change the flow direction and reduce the flow velocity of the flue gas. Utilizing the combined effects of gravity and centrifugal force, the flue gas flow and dust particles are separated, removing heavier dust particles and reducing the dust removal burden on the subsequent secondary dust removal chamber, thus improving the purification efficiency of the flue gas flow and enabling the recovery of dust particles. Secondly, the secondary dust removal chamber can further treat the flue gas after preliminary dust removal. The airflow undergoes a second dust removal process. After entering the secondary dust removal chamber, the installed plate filter element separates the rising dust airflow, removing smaller dust particles and achieving complete separation of the flue gas and dust particles. This further improves the dust removal efficiency. Simultaneously, the installed blowpipes, utilizing a translation mechanism, can reciprocate within the plate filter element. This reciprocating blowpipe cleans the filter element, preventing clogging, reducing the frequency of filter element replacement, lowering operating costs, and effectively improving dust removal efficiency. This system is easy to promote and use. Attached Figure Description
[0006] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0007] Figure 2 This is a top view of the translation mechanism in this utility model;
[0008] Figure 3 This is a top view of the filter element body in this utility model;
[0009] Figure 4 This is a top sectional view of the blowpipe 43 in this utility model;
[0010] In the diagram: 1-Dust hood, 2-Intermediate partition, 3-Primary dust removal chamber, 31-First baffle plate, 32-Second baffle plate, 33-Bottom plate, 34-Dust collection hole, 35-Baffle plate, 4-Secondary dust removal chamber, 41-Upper support seat, 41-Lower support seat, 43-Pulse jet pipe, 44-Upper support frame, 45-Lower support frame, 46-Filter plate, 47-Positioning plate, 48-Drive screw, 49-Slider, 410-Telescopic pipe, 411-Main air inlet pipe, 412-Air tank, 413-Pulley, 414-Drive belt, 415-Drive motor, 416-Pulley hole, 5-Dust hopper, 6-Screw discharge machine, 7-Sealed door, 8-Exhaust pipe, 9-Silencer, 10-Waste heat recovery unit. DETAILED DESCRIPTION
[0011] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.
[0012] like Figures 1-4 As shown, this utility model includes multiple dust collection hoods 1 and a dust collector connected to the dust collection hoods 1. The dust collection hoods 1 adopt the structure of the dust collection hoods used in the prior art. A middle partition 2 is vertically installed inside the dust collector, dividing the inner cavity of the dust collector into a primary dust collection chamber 3 and a secondary dust collection chamber 4. A connecting hole is provided at the upper part of the middle partition 2. A dust hopper 5 is provided at the bottom of both the primary dust collection chamber 3 and the secondary dust collection chamber 4. A screw conveyor 6 is provided at the bottom of the dust hopper 5. A primary dust collection component is provided in the primary dust collection chamber 3. A sealing door 7 is provided on the side wall of the secondary dust collection chamber 4, allowing personnel to enter the secondary dust collection chamber 4 to replace and maintain the components inside. A secondary dust removal assembly is installed, comprising an upper support 41 and a lower support 42 symmetrically arranged. Multiple sets of plate filter elements are installed at equal intervals on the upper support 41 and the lower support 42. A blowpipe 43 is provided on one side of each plate filter element. A translation mechanism connected to the blowpipe 43 is provided in the secondary dust removal chamber 4 above the upper support 41. An exhaust pipe 8 is provided at the top of the secondary dust removal chamber 4. A silencer 9 and a waste heat recovery device 10 are sequentially provided on the exhaust pipe 8. The silencer 9 is a structure used in the prior art, which can reduce the noise of the exhaust gas emitted by the exhaust pipe 8. The waste heat recovery device 8 can recover the waste heat of the flue gas. The waste heat recovery device 8 adopts a shell and tube heat exchanger structure used in the prior art.
[0013] The working process of this device is as follows: The flue gas generated in the rolling mill workshop is collected by the dust collector hood 1 and then enters the primary dust collector 3 through the dust collection pipeline for preliminary dust removal. After entering the primary dust collector chamber 3, the primary dust removal components can change the flow direction and reduce the flow velocity of the flue gas. Utilizing the combined effects of gravity and centrifugal force, the flue gas and dust particles are separated, separating the heavier dust particles from the flue gas. The separated heavier dust particles enter the ash hopper 5. The flue gas then enters the secondary dust collector chamber 4 through the connecting holes for further dust removal. After entering the secondary dust collector chamber 4, the plate filter element can separate the rising flue gas, removing the smaller dust particles. The separation process achieves complete separation of flue gas flow and dust particles. The separated smaller dust particles enter the ash hopper 5, where they are then uniformly recycled by the screw conveyor 6. The separated flue gas flow is discharged through the exhaust pipe 8. During the discharge of flue gas flow through the exhaust pipe 8, the silencer 9 reduces the noise of the exhaust gas. The waste heat recovery device 8 recovers the waste heat from the dust. In addition, when the plate filter element is in use, the translation mechanism can periodically drive the blowpipe 43 to reciprocate, using the reciprocating blowpipe 43 to clean the inside of the plate filter element, preventing internal blockage, reducing the frequency of plate filter element replacement, lowering operating costs, and effectively improving the efficiency of dust removal.
[0014] Furthermore, the primary dust removal assembly includes a first baffle plate 31 and a second baffle plate 32. A base plate 33 is installed between the primary dust removal chamber 3 and the ash hopper 5. The first baffle plate 31 is vertically installed on the top of the primary dust removal chamber 3 near the dust removal hood 1. The second baffle plate 32 is installed on the base plate 33 near the secondary dust removal chamber 4. Ash collection holes 34 are machined on the base plates on both sides of the second baffle plate 32. When the flue gas enters the primary dust removal chamber 3, its flow direction and velocity are changed once after being blocked by the first baffle plate 31. Then, it is blocked by the second baffle plate 32, and its flow direction and velocity are changed once more. After the flow velocity and direction of the flue gas are changed twice, the flue gas flows in a curved shape in the primary dust removal chamber 3, causing the flue gas to be affected by gravity. Under the action of [unclear], the separation of flue gas and larger dust particles can be achieved. The separated dust particles enter the ash hopper 5 through the ash discharge hole. Preferably, the side of the second baffle 32 near the first baffle 31 is set with an arc surface structure. The arc curvature of the second baffle 32 gradually increases from high to low. The arc surface structure can cause the flue gas flow to flow back and change direction, thereby generating centrifugal force. It realizes the dual effect of gravity and centrifugal force of airflow. Under the action of centrifugal force, the separation of flue gas and larger dust particles is achieved, further improving the dust removal effect. Multiple flow-blocking plates 35 are installed at equal intervals on the arc surface of the second baffle 32. The downwardly inclined flow-blocking plates 35 can block larger dust particles in the flue gas flow, improving the efficiency of separating larger dust particles from the flue gas flow.
[0015] Furthermore, the plate-type filter element includes an upper support frame 44 and a lower support frame 45 arranged symmetrically. The upper support frame 44 is mounted on an upper support base 41, and the lower support frame 45 is mounted on a lower support base 42. A filter element body is installed between the upper support frame 44 and the lower support frame 45. Installing the filter element body between the upper support frame 44 and the lower support frame 45 can improve the stability of the connection and prevent the filter element body from deforming and affecting the dust removal efficiency. The filter element body includes two symmetrically arranged filter plates 46 and a positioning plate 47 connecting the two sides of the two filter plates 46. The filter plate 46 is a corrugated plate with a polytetrafluoroethylene (PTFE) coating. The PTFE coating has properties such as inertness, smooth surface, and hydrophobicity, which makes it more effective in treating acidic, alkaline, and hygroscopic dust, and facilitates the purification of dirty air. The dusty airflow enters the irregular space between the two corrugated plates and rises in the curved space enclosed by the two corrugated plates and the positioning plate 47. When the finer dust particles in the dusty airflow collide with the corrugated plates, the finer dust particles will fall along the inner wall of the corrugated plates, thus achieving the separation of smaller dust particles from the flue gas flow.
[0016] Furthermore, the translation mechanism includes a transmission screw 48 and a slider 49. Multiple transmission screws 48 are rotatably mounted above each set of plate filter elements. The slider 49 is slidably mounted on the transmission screw 48. The upper end of the blowpipe 43 is connected to the slider 49, and the lower end of the blowpipe 43 is located inside the plate filter element. A telescopic pipe 410 is connected to the upper side of the blowpipe 43. The telescopic pipe 410 communicates with the air inlet main pipe 411 at the upper end of the transmission screw 48. One end of the air inlet main pipe 411 is sealed, and the other end is connected to the outlet of the gas tank 412. A pulse valve is provided. A pulley 413 is installed at the same end of the transmission screw 48 outside the secondary dust removal chamber 4. The pulleys 413 are connected by a transmission belt 414. A drive motor 415 is installed on one of the pulleys 413. The drive motor 415 is a structure used in existing technology; a finished product can be purchased directly based on the power required. When it is necessary to perform pulse cleaning of the filter element body, the pulse valve at the outlet of the air tank 412 is opened. The compressed air in the air tank 412 enters the intake main pipe 411, and then enters the blowpipe 43 through each telescopic pipe 410. The compressed air is then ejected through the blowpipe 43. Air is blown and cleaned against the inner wall of the filter element body. During the process of supplying compressed air to the blow pipe 43, the drive motor 415 drives the pulley 413 connected to it to rotate, which in turn drives multiple pulleys 413 to rotate synchronously through the transmission belt 414, thereby realizing the synchronous rotation of multiple transmission screws 48. During the rotation of the transmission screws 48, the slider 49 can move on the transmission screw 48, which in turn drives the blow pipe 43 connected to it to move back and forth. This can perform a comprehensive blow cleaning of the inner cavity of the filter element body. Preferably, in order to improve the thorough and comprehensive cleaning of the inner cavity of the filter element body, the blow pipe 43 is... The lower end of the blowpipe 43 extends into the lower part of the plate filter element. A sealing plate is installed at the bottom of the blowpipe 43. Multiple rings of air jet holes 416 are installed at equal intervals on the wall of the blowpipe 43 located inside the plate filter element. Each ring of air jet holes 416 is evenly distributed around the blowpipe 43, and the number of air jet holes 416 in each ring is 3 to 5. The blowpipe 43 is arranged through the filter element body. The multiple rings of blowpipe 43 are used to perform all-round blowing and cleaning of the inner cavity of the filter element body. In order to further improve the blowing and cleaning effect of the filter element body, the upper and lower adjacent rings of air jet holes 416 are staggered on the blowpipe 43.
Claims
1. A dust control device for a steel rolling mill, comprising multiple dust hoods (1) and a dust collector connected to the dust hoods (1), characterized in that: The dust collector is vertically equipped with a middle partition (2), which divides the inner cavity of the dust collector into a primary dust collection chamber (3) and a secondary dust collection chamber (4). A connecting hole is provided at the upper part of the middle partition (2). A dust hopper (5) is provided at the bottom of both the primary dust collection chamber (3) and the secondary dust collection chamber (4). A screw conveyor (6) is provided at the bottom of the dust hopper (5). A primary dust collection component is provided in the primary dust collection chamber (3). A sealing door (7) is provided on the side wall of the secondary dust collection chamber (4). A secondary dust collector is installed in the secondary dust collection chamber (4). The secondary dust removal assembly includes an upper support (41) and a lower support (42) symmetrically arranged. Multiple sets of plate filter elements are installed at equal intervals on the upper support (41) and the lower support (42). A blow pipe (43) is provided on one side of the plate filter element. A translation mechanism connected to the blow pipe (43) is provided in the secondary dust removal chamber (4) above the upper support (41). An exhaust pipe (8) is provided at the top of the secondary dust removal chamber (4). A silencer (9) and a waste heat recovery device (10) are arranged sequentially on the exhaust pipe (8).
2. The dust control device for the rolling mill room of a steel rolling production line according to claim 1, characterized in that: The primary dust removal assembly includes a first baffle plate (31) and a second baffle plate (32). A base plate (33) is installed between the primary dust removal chamber (3) and the ash hopper (5). The first baffle plate (31) is vertically installed on the top of the primary dust removal chamber (3) near the dust removal hood (1). The second baffle plate (32) is installed on the base plate (33) near the secondary dust removal chamber (4). Ash dropping holes (34) are machined on the base plates on both sides of the second baffle plate (32).
3. The dust control device for the rolling mill room of a steel rolling production line according to claim 2, characterized in that: The side of the second baffle (32) near the first baffle (31) is provided with an arc surface structure, and the arc of the second baffle (32) gradually increases from high to low.
4. The dust control device for the rolling mill room of a steel rolling production line according to claim 2, characterized in that: Multiple flow deflectors (35) are installed at equal intervals on the arc surface of the second deflector (32) at an angle downwards.
5. The dust control device for the rolling mill room of a steel rolling production line according to claim 1, characterized in that: The plate filter element includes an upper support frame (44) and a lower support frame (45) arranged symmetrically. The upper support frame (44) is mounted on an upper support base (41), and the lower support frame (45) is mounted on a lower support base (42). A filter element body is installed between the upper support frame (44) and the lower support frame (45). The filter element body includes two symmetrically arranged filter plates (46) and a positioning plate (47) connecting the two sides of the filter plates (46). The filter plates (46) are corrugated plates.
6. The dust control device for the rolling mill room of a steel rolling production line according to claim 1, characterized in that: The translation mechanism includes a transmission screw (48) and a slider (49). There are multiple transmission screws (48), which are rotatably mounted above each set of plate filter elements. The slider (49) is slidably mounted on the transmission screws (48). The upper end of the blowpipe (43) is connected to the slider (49), and the lower end of the blowpipe (43) is located inside the plate filter element. A telescopic pipe (410) is connected to the upper side of the blowpipe (43). The air intake pipe (411) is connected to the upper end of the transmission screw (48). One end of the air intake pipe (411) is sealed, and the other end is connected to the outlet of the gas tank (412). A pulse valve is provided on the outlet of the gas tank (412). A pulley (413) is installed on the same end of the transmission screw (48) outside the secondary dust removal chamber (4). The pulleys (413) are connected by a transmission belt (414). A drive motor (415) is installed on one of the pulleys (413).
7. A dust control device for a steel rolling production line mill room according to claim 6, characterized in that: The lower end of the blowpipe (43) extends into the lower part of the plate filter element. A sealing plate is installed at the bottom of the blowpipe (43). Multiple rings of air jet holes (416) are installed at equal intervals on the pipe wall of the blowpipe (43) located in the plate filter element. Each ring of air jet holes (416) is evenly distributed around the blowpipe (43), and the number of air jet holes (416) in each ring is 3 to 5.
8. A dust control device for a steel rolling mill workshop according to claim 7, characterized in that: Two adjacent rings of jet holes (416) are staggered on the jet pipe (43).