Gas flow limiting structure of desulfurization and denitrification dust collector

Abstract

The utility model discloses a kind of desulfurization denitration dust collector gas flow limiting structure, including box, the outer wall side of box is communicated with air inlet pipe, the outer wall other side of box is communicated with air outlet pipe, flange is fixedly connected with the end of air inlet pipe and air outlet pipe away from box, desulfurization denitration dust collector gas flow limiting structure further includes flow control device, flow control device is set to the inner wall of box;Sensing device is set to the top of box;Wherein, by flow control device control gas through air inlet pipe into the flow of inside box.The utility model relates to desulfurization denitration dust collector gas flow limiting technical field, by the cooperation between baffle, slide rail and baffle plate, gas flows through air inlet pipe and into the inside of box, rotating plate rotates under the action of pin shaft and the role of gas flow, gap appears between with baffle, gas flow is faster, and the opening and closing between with baffle is greater, otherwise smaller, while rotating plate rotates, by first connecting rod can drive baffle plate to move upwards on the outer wall of slide rail.

Description

Technical Field

[0001] This utility model relates to the field of gas flow limiting technology for desulfurization, denitrification and dust removal equipment, specifically a gas flow limiting structure for desulfurization, denitrification and dust removal equipment. Background Technology

[0002] A desulfurization, denitrification, and dust removal device is a purification device installed on a flue gas duct. It uses reducing agents such as NH3 and urea to spray into a region with a temperature of 850-1100℃ inside the device. The reducing agent rapidly decomposes into NH3 and selectively reacts with NOx in the flue gas, reducing NOx to nitrogen and water.

[0003] Existing desulfurization, denitrification, and dust removal equipment typically uses valves to control the gas flow rate, thereby controlling the gas flow rate inside the pipeline.

[0004] However, the existing gas flow limiting structure of desulfurization, denitrification and dust removal equipment is often difficult to accurately regulate the gas flow. Some flow limiting structures rely only on simple valve control. When the gas flow in the inlet pipe fluctuates greatly, the response and adjustment ability is slow, resulting in unstable pressure inside the chamber. This not only reduces the desulfurization, denitrification and dust removal effect, but may also damage the equipment due to excessive pressure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a gas flow limiting structure for a desulfurization, denitrification, and dust removal device. This solves the problem that when gas is limited by a simple perforated plate with holes, the gas tends to carry a lot of dust, and the holes on the perforated plate are small in size, which can easily cause blockage and lead to poor gas flow.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a gas flow limiting structure for a desulfurization, denitrification, and dust removal device, comprising a housing, an inlet pipe connected to one side of the outer wall of the housing, and an outlet pipe connected to the other side of the outer wall of the housing. Flanges are fixedly connected to the ends of both the inlet and outlet pipes furthest from the housing. The gas flow limiting structure also includes a flow control device located on the inner wall of the housing; a sensing device is located on the top of the housing. The flow control device controls the flow rate of gas entering the housing through the inlet pipe and exiting through the outlet pipe, while the sensing device monitors the internal pressure of the housing.

[0007] Preferably, the flow control device includes a baffle plate, which is fixedly connected to the inner wall of the housing near the air inlet pipe; a flow hole is opened on the outer wall of the baffle plate; a rotating plate is rotatably connected to the top of the housing via a pin and is located on the side of the baffle plate away from the air inlet pipe; a first sealing strip is fixedly connected to the outer wall of the rotating plate near the flow hole and fits against the outer wall of the baffle plate; a slide rail is fixedly connected to the inner wall of the housing near the air outlet pipe; one end of a first connecting rod is rotatably connected to the outer wall of the rotating plate via a pin; a blocking plate is slidably engaged with the outer wall of the slide rail and is rotatably connected to the other end of the first connecting rod via a pin; an auxiliary device is disposed on the wall surface of the blocking plate; wherein, the gas flow rate entering from the air inlet pipe drives the rotating plate to open, and drives the blocking plate to appropriately close the end face of the air outlet pipe through the first connecting rod, ensuring a balanced exhaust flow rate of the air outlet pipe, and the rotating plate cooperates with the first sealing strip to prevent backflow.

[0008] Preferably, the auxiliary device includes two arc surfaces, which are respectively opened on the upper and lower sides of the outer wall of the blockage plate near the air outlet pipe; the second sealing strip is fixedly connected to the side of the outer wall of the blockage plate near the air outlet pipe; wherein, the arc surfaces and the second sealing strip are provided to ensure the smoothness and fit of the blockage plate as it moves to the end face of the air outlet pipe.

[0009] Preferably, a filter screen is threadedly connected to the outer wall of the air intake pipe on the side inside the housing.

[0010] Preferably, the sensing device includes a pressure sensor, which is fixedly connected to the top of the inner wall of the enclosure; a controller is fixedly connected to the top of the enclosure and electrically connected to the pressure sensor; and an alarm is fixedly connected to the top of the enclosure, located on the outer wall of the controller away from the pressure sensor, and electrically connected to the controller. The pressure sensor monitors the internal pressure of the enclosure and transmits the monitoring data to the controller, which then controls the alarm based on the data.

[0011] Beneficial effects This utility model provides a gas flow limiting structure for a desulfurization, denitrification, and dust removal device. It offers the following advantages: Through the cooperation of a baffle, a slide rail, and a blocking plate, gas flows into the interior of the housing via the inlet pipe. The rotating plate rotates under the action of the pin and the gas flow, creating a gap between itself and the baffle. The faster the gas flow, the larger the opening and closing of the gap with the baffle, and vice versa. Simultaneously, the rotating plate, via a first connecting rod, moves the blocking plate upwards on the outer wall of the slide rail, sealing the outlet pipe. When the gas flow speed is too fast, the larger the rotation of the rotating plate, the larger the area of ​​the blocking plate on the end face of the outlet pipe, thus limiting the gas flow and maintaining a stable gas flow speed in the outlet pipe.

[0012] Through the cooperation between the sleeve, the limiting rod, and the second connecting rod, when the blocking plate moves upward on the outer wall of the slide rail, the limiting rod moves upward on the inner wall of the sleeve through the connection of the second connecting rod. The limiting block on the outer wall of the limiting rod controls the upward movement distance of the limiting rod, thereby limiting the movement distance of the blocking plate and preventing the blocking plate from completely blocking the end face of the air outlet pipe, thus preventing the gas from flowing out. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the appearance of the present utility model; Figure 3 for Figure 1 A structural diagram of the first connecting rod, the blocking plate, and the slide rail; Figure 4 for Figure 1 A schematic diagram of the structure of the central air intake pipe, housing, and filter.

[0014] In the diagram: 1. Housing; 11. Inlet pipe; 12. Outlet pipe; 2. Flow control device; 21. Baffle; 22. Flow hole; 23. Rotating plate; 24. First sealing strip; 25. Slide rail; 26. First connecting rod; 27. Blocking plate; 28. Auxiliary device; 281. Arc surface; 282. Second sealing strip; 3. Filter screen; 4. Flange; 5. Sensing device; 51. Pressure sensor; 52. Controller; 53. Alarm device. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Existing gas flow limiting structures for desulfurization, denitrification, and dust removal equipment often struggle to precisely regulate gas flow. Some flow limiting structures rely solely on simple valve control, resulting in slow response and adjustment when the gas flow in the inlet pipe fluctuates significantly. This leads to unstable pressure within the chamber, which not only reduces the desulfurization, denitrification, and dust removal efficiency but may also damage the equipment due to excessive pressure.

[0017] In view of this, the present invention provides a gas flow limiting structure for a desulfurization, denitrification and dust removal device. Through the cooperation between the baffle, the slide rail and the blocking plate, the gas flows into the interior of the housing through the inlet pipe. The rotating plate rotates under the action of the pin and the gas flow, and a gap appears between it and the baffle. The faster the gas flow, the larger the opening and closing of the gap with the baffle, and vice versa. While the rotating plate rotates, the blocking plate can be driven to move upward on the outer wall of the slide rail through the first connecting rod to block the gas outlet pipe. When the gas flow speed is too fast, the larger the rotation of the rotating plate, the larger the area of ​​the blocking plate blocking the end face of the gas outlet pipe, thus limiting the gas flow and keeping the gas flow speed in the gas outlet pipe at a stable value.

[0018] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0019] Example 1: By Figure 1-4 It is known that a gas flow limiting structure for a desulfurization, denitrification, and dust removal device includes a housing 1. An inlet pipe 11 is connected to one side of the outer wall of the housing 1, and an outlet pipe 12 is connected to the other side of the outer wall of the housing 1. A flange 4 is fixedly connected to the end of the inlet pipe 11 and the outlet pipe 12 away from the housing 1. The gas flow limiting structure for the desulfurization, denitrification, and dust removal device also includes a flow control device 2 and a sensing device 5. The flow control device 2 is located on the inner wall of the housing 1, and the sensing device 5 is located on the top of the housing 1. The flow control device 2 controls the flow rate of gas entering the housing 1 through the inlet pipe 11 and discharging it through the outlet pipe 12. The sensing device 5 monitors the internal pressure of the housing 1. In the specific implementation process, it is worth noting that the air inlet pipe 11 and the air outlet pipe 12 are connected between the equipment through the flange 4. The gas flows in through the air inlet pipe 11, enters the flow control device 2 inside the box 1 for flow restriction, and finally is discharged through the air outlet pipe 12. The pressure inside the box 1 is monitored by the sensing device 5. Furthermore, the flow control device 2 includes a baffle 21, a flow hole 22, a rotating plate 23, a first sealing strip 24, a slide rail 25, a first connecting rod 26, a blocking plate 27, and an auxiliary device 28. The baffle 21 is fixedly connected to the inner wall of the housing 1 near the air inlet pipe 11; the flow hole 22 is opened on the outer wall of the baffle 21; the rotating plate 23 is rotatably connected to the top of the housing 1 via a pin and is located on the side of the baffle 21 away from the air inlet pipe 11; the first sealing strip 24 is fixedly connected to the outer wall of the rotating plate 23 near the flow hole 22 and fits against the outer wall of the baffle 21; the slide rail 25... The first connecting rod 26 is fixedly connected to the inner wall of the housing 1 near the side of the exhaust pipe 12; one end of the first connecting rod 26 is rotatably connected to the outer wall of the rotating plate 23 via a pin; the blocking plate 27 is slidably engaged with the outer wall of the slide rail 25, and is rotatably connected to the other end of the first connecting rod 26 via a pin; the auxiliary device 28 is set on the wall surface of the blocking plate 27; wherein, the gas flow entering from the intake pipe 11 drives the rotating plate 23 to open, and drives the blocking plate 27 to appropriately close the end face of the exhaust pipe 12 through the first connecting rod 26, ensuring that the exhaust flow of the exhaust pipe 12 is balanced, and the rotating plate 23 cooperates with the first sealing strip 24 to prevent backflow; In the specific implementation process, it is worth noting that when gas enters the interior of the housing 1 through the inlet pipe 11, the rotating plate 23 rotates due to the gas entry, creating a gap between it and the baffle 21, allowing the gas to flow out through the flow hole 22. As the rotating plate 23 rotates, the first connecting rod 26 drives the blocking plate 27 to move upward on the outer wall of the slide rail 25. The movement of the blocking plate 27 can seal one end of the outlet pipe 12 located inside the housing 1. The size of the sealing area of ​​the blocking plate 27 on the end face of the outlet pipe 12 is controlled according to the gas flow rate. When the gas flow rate is too fast, the rotating plate 23 rotates more, and the area of ​​the blocking plate 27 on the end face of the outlet pipe 12 is larger, thus limiting the gas flow and keeping the gas flow rate in the outlet pipe 12 at a stable value. The first sealing strip 24 is made of high-temperature resistant rubber to ensure the sealing between the rotating plate 23 and the baffle 21. Furthermore, the auxiliary device 28 includes an arc surface 281 and a second sealing strip 282. Two arc surfaces 281 are provided, respectively opened on the upper and lower sides of the outer wall of the blocking plate 27 near the vent pipe 12. The second sealing strip 282 is fixedly connected to the outer wall of the blocking plate 27 near the vent pipe 12. The arc surface 281 and the second sealing strip 282 ensure the smoothness and fit of the blocking plate 27 as it moves to the end face of the vent pipe 12. In the specific implementation process, it is worth noting that when the blocking plate 27 moves upward, the setting of the arc surface 281 and the second sealing strip 282 can ensure that the blocking plate 27 can move smoothly to the end face of the first vent pipe 12, avoiding jamming. The second sealing strip 282 is also made of high temperature resistant rubber material. Example 2: From Figure 1-4It can be seen that the outer wall of the intake pipe 11 is threaded with a filter screen 3 on the side inside the box 1; In the specific implementation process, it is worth noting that by setting the filter screen 3, dust in the gas can be filtered to prevent excessive dust from entering the box 1 and affecting the pins at both ends of the first connecting rod 26 that are connected to the rotating plate 23 and the blocking plate 27 respectively. This also ensures that the blocking plate 27 can move smoothly on the outer wall of the slide rail 25. The front of the box 1 is fixed with a cover by bolts. Opening the cover makes it easy to replace the filter screen 3 and to install the various structures inside the box 1. Furthermore, the sensing device 5 includes a pressure sensor 51, a controller 52, and an alarm 53. The pressure sensor 51 is fixedly connected to the top of the inner wall of the housing 1; the controller 52 is fixedly connected to the top of the housing 1 and electrically connected to the pressure sensor 51; the alarm 53 is fixedly connected to the top of the housing 1 and located on the outer wall of the controller 52 away from the pressure sensor 51, and is electrically connected to the controller 52. The pressure sensor 51 monitors the internal pressure of the housing 1 and transmits the monitoring data to the controller 52, which then controls the alarm 53 based on the data. In the specific implementation process, it is worth noting that the pressure sensor 51 monitors the pressure inside the chamber 1. If the pressure is too high, the data is transmitted to the controller 52, which then activates the alarm 53 to alert personnel, allowing for investigation of the cause of the excessive pressure inside the chamber 1. The pressure sensor 51 is a CYYZ68, the controller 52 is an S7-200, and the alarm 53 is an SAB-100. In this device, the controller 52 is fixedly connected to the top of the chamber 1 and connected to the pressure sensor 51 via an RS485 communication interface, using the standard Modbus communication protocol. -RTU protocol, set appropriate baud rate, data bits, stop bits and parity bits, for example baud rate 9600, data bits 8 bits, stop bits 1 bit, parity bit none. Specific parameters can be adjusted according to actual situation to achieve stable data transmission and accurate reception. The controller 52 is programmed to set the normal range of internal pressure of the box 1 and alarm threshold and other parameters. When the received data from the pressure sensor 51 exceeds the set alarm threshold, the controller 52 can send a control signal in time. The bottom of the controller 52 and the alarm 53 are equipped with heat insulation plates to avoid the box 1 from being affected by excessive temperature. The pressure sensor 51 also has high temperature resistance characteristics.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas flow limiting structure for a desulfurization, denitrification, and dust removal device, comprising a housing (1), characterized in that: An air inlet pipe (11) is connected to one side of the outer wall of the housing (1), and an air outlet pipe (12) is connected to the other side of the outer wall of the housing (1). A flange (4) is fixedly connected to the end of both the air inlet pipe (11) and the air outlet pipe (12) away from the housing (1). The gas flow restriction structure of the desulfurization and denitrification dust collector also includes: A flow control device (2) is disposed on the inner wall of the housing (1); A sensing device (5) is disposed on the top of the housing (1); The flow control device (2) controls the flow rate of gas entering the box (1) through the inlet pipe (11) and discharges it through the outlet pipe (12). The sensing device (5) monitors the pressure inside the box (1). The flow control device (2) includes: A baffle (21) is fixedly connected to the inner wall of the box (1) on the side near the air inlet pipe (11); A flow hole (22) is provided on the outer wall of the baffle (21); The rotating plate (23) is rotatably connected to the top of the box (1) by a pin and is located on the side of the baffle (21) away from the air inlet pipe (11); The first sealing strip (24) is fixedly connected to the outer wall of the rotating plate (23) near the flow hole (22) and is in contact with the outer wall of the baffle (21); The slide rail (25) is fixedly connected to the inner wall of the box (1) on the side near the air outlet pipe (12); The first connecting rod (26) is rotatably connected at one end to the outer wall of the rotating plate (23) via a pin. The blocking plate (27) is slidably attached to the outer wall of the slide rail (25) and is rotatably connected to the other end of the first connecting rod (26) via a pin. An auxiliary device (28) is disposed on the wall surface of the blocking plate (27); The gas flow from the intake pipe (11) drives the rotating plate (23) to open, and the first connecting rod (26) drives the blocking plate (27) to appropriately seal the end face of the exhaust pipe (12), ensuring that the exhaust flow of the exhaust pipe (12) is balanced, and the rotating plate (23) cooperates with the first sealing strip (24) to prevent backflow.

2. The gas flow limiting structure for a desulfurization, denitrification, and dust removal device according to claim 1, characterized in that: The auxiliary device (28) includes: Two arc surfaces (281) are provided, respectively located on the upper and lower sides of the outer wall of the block plate (27) near the air outlet pipe (12); The second sealing strip (282) is fixedly connected to the outer wall of the plug plate (27) on the side near the air outlet pipe (12); The arc surface (281) and the second sealing strip (282) ensure the smoothness and fit of the blocking plate (27) as it moves to the end face of the air outlet pipe (12).

3. The gas flow limiting structure for a desulfurization, denitrification, and dust removal device according to claim 1, characterized in that: The outer wall of the air intake pipe (11) is threaded with a filter screen (3) on the side inside the box (1).

4. The gas flow limiting structure for a desulfurization, denitrification, and dust removal device according to claim 1, characterized in that: The sensing device (5) includes: A pressure sensor (51) is fixedly connected to the top of the inner wall of the housing (1); The controller (52) is fixedly connected to the top of the housing (1) and electrically connected to the pressure sensor (51); The alarm (53) is fixedly connected to the top of the housing (1) and located on the outer wall of the controller (52) away from the pressure sensor (51), and is electrically connected to the controller (52). The pressure sensor (51) monitors the internal pressure of the box (1) and transmits the monitoring data to the controller (52). The controller (52) controls the alarm (53) based on the data.

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