Continuous waste gas recovery treatment device

Abstract

The utility model discloses a continuous waste gas recovery processing device which comprises a main channel connected to a boiler chimney and an auxiliary channel welded and communicated to one side of the main channel, filter assemblies are arranged in the main channel and the auxiliary channel, and a valve assembly is arranged at the joint of the main channel and the auxiliary channel. The valve assembly comprises a second sealing baffle fixed to the inner wall of the main channel, a first sealing baffle fixed to the inner wall of the auxiliary channel and a valve plate matched with the first sealing baffle and the second sealing baffle. The gas treatment passage is switched through rotation of the valve plate, so that when a filter assembly in the main channel or the auxiliary channel breaks down or is maintained, the other channel is used for gas treatment, shutdown is not needed, meanwhile, when the amount of gas exhausted from the chimney is large, the main channel and the auxiliary channel can be used for double-channel treatment, and the treatment load is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas filtering, in particular to a continuous waste gas recovery and treatment device. Background Art

[0002] The exhaust gas from the heat exchange path contains a large amount of dust and heat. Therefore, when recovering the exhaust gas, the heat is recovered by heat exchange, and then the dust is filtered and discharged. If the exhaust gas contains sulfur and nitrogen oxides, further desulfurization and denitrification treatment is required.

[0003] After searching, a utility model patent with Chinese patent announcement number CN214019716U discloses an exhaust gas filter for high-temperature exhaust gas treatment, including an exhaust gas filter body, a filter plate is arranged on the exhaust gas filter body, handles are arranged on the outer walls at both ends of the exhaust gas filter body, a protective component is fixed to the outer wall of the exhaust gas filter body, and disassembly components are fixed to the outer walls on both sides of the exhaust gas filter body, and the handles are fixed to the outer wall of the exhaust gas filter body through the disassembly components.

[0004] The above patent has the following shortcomings: it uses a single-channel filter for gas filtration, which requires shutdown when the filter fails or is maintained, and continuous operation cannot be achieved.

[0005] To this end, a continuous waste gas recovery and treatment device is proposed. Utility Model Content

[0006] The technical solution of the embodiment of the utility model is implemented as follows: a continuous exhaust gas recovery and treatment device, comprising a main channel connected to the boiler chimney and a secondary channel welded and connected to one side of the main channel, wherein the main channel and the secondary channel are both provided with a filter assembly inside, and a valve assembly is provided at the connection between the main channel and the secondary channel;

[0007] The valve assembly includes a second sealing baffle fixed to the inner wall of the main channel, a first sealing baffle fixed to the inner wall of the secondary channel, and a valve plate matched with the first and second sealing baffles. A rotating shaft is fixed to one side of the valve plate, and the rotating shaft is rotatably connected to the inner wall of the main channel. A motor is fixed to the outer wall of the main channel by bolts, and the output shaft of the motor is connected to the end of the rotating shaft by a coupling.

[0008] In some embodiments, a heat recovery component is arranged upstream of the connection between the main channel and the secondary channel. The heat recovery component includes a heat exchange tube fixed to the inner wall of the main channel and a heat exchanger fixed to the side wall of the heat exchange tube. A fluid pump is arranged at the connection between the heat exchanger and the heat exchange tube.

[0009] In some embodiments, a smoke sensor is disposed in the main channel at an upstream position of the connection between the main channel and the secondary channel.

[0010] In some embodiments, a temperature sensor is disposed in the main channel at an upstream position of the connection between the main channel and the secondary channel.

[0011] In some embodiments, an air pressure sensor is disposed in the main channel at an upstream position of the connection between the main channel and the secondary channel.

[0012] In some embodiments, the smoke sensor, temperature sensor, and air pressure sensor are connected to a control cabinet, which is connected to the motor and fluid pump, and has a built-in signal receiver, a central processing unit, and a controller.

[0013] In some embodiments, the filter components in the main channel and the filter components in the secondary channel are arranged in multiple groups, and the mesh size of each group of filter components increases along the gas processing direction.

[0014] In some embodiments, the filter assembly includes a baffle ring 1 and a baffle ring 2 fixed to the inner walls of the main channel and the secondary channel, and a filter plate slidably connected to the inner walls of the main channel and the secondary channel is provided on the opposite side of the baffle ring 1 and the baffle ring 2, and the filter plate is connected to the baffle ring 2 through a spring 1.

[0015] In some embodiments, the side walls of the main channel and the secondary channel are provided with limiting components for limiting the position of the filter plate.

[0016] In some embodiments, the limiting assembly includes an outer shell fixed to the side walls of the main channel and the secondary channel and a slide plate slidably connected to the inner wall of the outer shell, a spring 2 is provided on one side of the slide plate, the other end of the spring 2 is buckled to the inner wall of the outer shell, and an arc head limiting rod for limiting the filter plate is fixed to the other side of the slide plate.

[0017] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0018] 1. A continuous waste gas recovery and treatment device, which is provided with two channels, a main channel and a secondary channel, and a valve assembly, and uses the rotation of the valve plate to switch the gas treatment channel. Therefore, when the filter assembly in the main channel or the secondary channel fails or is maintained, the other channel can be used for gas treatment without stopping the machine. At the same time, when the amount of gas discharged from the chimney is large, the main channel and the secondary channel can be used for dual-channel treatment to reduce the treatment load.

[0019] 2. A continuous waste gas recovery and treatment device, which can automatically control the switching of treatment channels and heat recovery efficiency according to the smoke concentration, temperature and filtration pressure by setting up smoke sensors, temperature sensors, air pressure sensors and control cabinets and other components.

[0020] 3. A continuous waste gas recovery and treatment device, which is equipped with multiple groups of filter components, and the mesh size of each group of filter components increases along the gas treatment direction, so that the impurities of different particle sizes in the smoke can be filtered step by step from large to small, thereby reducing the filtering load of each group of filter components and delaying the maintenance cycle.

[0021] 4. A continuous waste gas recovery and treatment device, which achieves the purpose of self-cleaning by setting the filter component as a combination of a baffle ring 1, a filter plate, and a baffle ring 2, so that after a single use, the filtered smoke and dust particles can be shaken off by the impact force of the filter plate rebounding with the baffle ring 1, thereby achieving the purpose of self-cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is the overall structure diagram of the continuous waste gas recovery and treatment device of the utility model;

[0024] Figure 2 This is a structural diagram of the valve assembly of the continuous waste gas recovery and treatment device of the utility model;

[0025] Figure 3 This is an internal structural diagram of the upstream of the main channel of the continuous exhaust gas recovery and treatment device of the utility model;

[0026] Figure 4 This is a structural diagram of the filter assembly of the continuous waste gas recovery and treatment device of the utility model;

[0027] Figure 5 It is a cross-sectional structural diagram of the limiting component of the continuous exhaust gas recovery and treatment device of the utility model;

[0028] Figure 6 This is a circuit diagram of the continuous waste gas recovery and treatment device of the utility model.

[0029] Reference numerals:

[0030] 1-main channel, 2-filter assembly, 3-secondary channel, 4-valve assembly, 5-valve plate, 6-sealing baffle 1, 7-motor, 8-rotating shaft, 9-sealing baffle 2, 10-smoke sensor, 11-heat recovery assembly, 12-temperature sensor, 13-heat exchanger, 14-fluid pump, 15-heat exchange tube, 16-arc head limit rod, 17-air pressure sensor, 18-retaining ring 1, 19-filter plate, 20-spring 1, 21-retaining ring 2, 22-limiting assembly, 23-outer shell, 24-spring 2, 25-slide plate. DETAILED DESCRIPTION

[0031] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0032] Example 1: Figure 1-6 As shown, a continuous exhaust gas recovery and treatment device includes a main channel 1 connected to the boiler chimney and a secondary channel 3 welded and connected to one side of the main channel 1, a filter assembly 2 is arranged inside the main channel 1 and the secondary channel 3, and a valve assembly 4 is arranged at the connection between the main channel 1 and the secondary channel 3.

[0033] The valve assembly 4 includes a sealing baffle 2 9 fixed to the inner wall of the main channel 1, a sealing baffle 1 6 fixed to the inner wall of the secondary channel 3, and a valve plate 5 cooperating with the sealing baffle 1 6 and the sealing baffle 2 9. A rotating shaft 8 is fixed to one side of the valve plate 5, and the rotating shaft 8 is rotatably connected to the inner wall of the main channel 1. A motor 7 is fixed to the outer wall of the main channel 1 by bolts, and the output shaft of the motor 7 is connected to the end of the rotating shaft 8 by a coupling.

[0034] When the device is in use, the end of the main channel 1 is connected to the chimney to receive the gas discharged from the chimney, and then the position of the motor 7 is controlled. The motor 7 can drive the rotating shaft 8 to rotate by rotating, thereby driving the valve plate 5 to rotate. When the valve plate 5 is in contact with the sealing baffle 2 9, the filter component 2 in the secondary channel 3 performs exhaust gas filtering. When the valve plate 5 is in contact with the sealing baffle 1 6, the filter component 2 in the main channel 1 performs exhaust gas filtering. Moreover, when the amount of gas discharged from the chimney is large, the valve plate 5 can be placed in the middle position, and the filter components 2 in the main channel 1 and the secondary channel 3 are filtered synchronously.

[0035] The device is provided with two channels, a main channel 1 and a secondary channel 3, and a valve assembly 4, and utilizes the rotation of a valve plate 5 to switch the gas processing passage. Thus, when the filter assembly 2 in the main channel 1 or the secondary channel 3 fails or is under maintenance, the other channel can be utilized for gas processing without shutting down the device. At the same time, when the amount of gas discharged from the chimney is large, both the main channel 1 and the secondary channel 3 can be used for dual-channel processing to reduce the processing load.

[0036] In this embodiment, a heat recovery component 11 is provided upstream of the connection between the main channel 1 and the secondary channel 3. The heat recovery component 11 includes a heat exchange tube 15 fixed to the inner wall of the main channel 1 and a heat exchanger 13 fixed to the side wall of the heat exchange tube 15. A fluid pump 14 is provided at the connection between the heat exchanger 13 and the heat exchange tube 15. In this embodiment, the specific type of the heat exchanger 13 is not limited, and it is preferably a tubular heat exchanger. The tubular heat exchanger has two fluid channels, one of which is connected to the heat exchange tube 15 to form a circulation loop, and the other is connected to the heat recovery point to recover heat, so that when the fluid pump 14 is started, it can drive the heat exchanger 15 to recover heat. The fluid in the fluid channel connecting the heat pipe 15 and the heat exchange pipe 15 to the heat exchanger 13 circulates, thereby driving the heat of the gas in the main channel 1 and raising the temperature, and then transferring the fluid with the increased temperature to another fluid channel, thereby realizing heat energy exchange. The fluid in the other channel after the exchange can be used for preheating the boiler, or the channel can be directly connected to cold water to realize hot water supply. The fluid in the flow channel can also be set to gas, and then the technical means in the utility model patent with announcement number CN221166658U are used to recover heat energy. Since it is a prior art, this embodiment only shows the part of recovering the exhaust gas energy in the main channel 1, and no further elaboration is made.

[0037] In this embodiment, a smoke sensor 10 is provided in the main channel 1 at an upstream position of the connection between the main channel 1 and the secondary channel 3 .

[0038] In this embodiment, a temperature sensor 12 is provided in the main channel 1 at an upstream position of the connection between the main channel 1 and the secondary channel 3 .

[0039] In this embodiment, an air pressure sensor 17 is provided in the main channel 1 at an upstream position of the connection between the main channel 1 and the secondary channel 3 .

[0040] In this embodiment, the smoke sensor 10, the temperature sensor 12, and the air pressure sensor 17 are connected to a control cabinet, which is connected to the motor 7 and the fluid pump 14, and has a signal receiver, a central processing unit, and a controller built in the control cabinet.

[0041] In addition, the present embodiment does not limit the specific fixed position of the control cabinet, which can be fixed to the main channel 1, the secondary channel 3 or other positions convenient for operation and control. It is intended to receive signals from the smoke sensor 10, the temperature sensor 12, and the air pressure sensor 17, and then process them, and then control the start and stop of the motor 7 and the fluid pump 14 according to the control logic. The specific control logic is:

[0042] S1: Based on the control logic of the smoke sensor 10, the smoke concentration threshold is set according to the filtering capacity of the filter assembly 2 in the main channel 1 and the auxiliary channel 3. The smoke sensor 10 will monitor the smoke concentration at the air inlet of the main channel 1 in real time. When the smoke concentration is higher than the threshold, the motor 7 will be controlled to change the position of the valve plate 5, so that the main channel 1 and the auxiliary channel 3 are in dual-channel filtering mode, reducing the filtering load of the single channel;

[0043] S2: Based on the control logic of the air pressure sensor 17, the pressure threshold is determined according to the upstream pressure of the filter assembly 2 during normal filtration. When the pressure monitored by the air pressure sensor 17 is relatively high, it means that the filtration load in the current state is relatively high or part of the filter assembly 2 is blocked. The motor 7 is controlled to change the position of the valve plate 5, switch the channel, and notify the staff to perform maintenance.

[0044] S3: Based on the control logic of the temperature sensor 12, the temperature sensor 12 will monitor the intake temperature of the main channel 1 in real time. When the intake temperature is higher, it will control the power of the fluid pump 14 to increase, increase the flow rate of the fluid, increase the heat exchange rate, and ensure the heat recovery rate, and vice versa.

[0045] The device, by arranging components such as a smoke sensor 10, a temperature sensor 12, an air pressure sensor 17 and a control cabinet, can automatically control the switching of the processing channels and the heat recovery efficiency according to the smoke concentration, temperature and filtering pressure.

[0046] In this embodiment: the end of the main channel 1 is connected to the chimney to receive the gas discharged from the chimney, and then the position of the motor 7 is controlled. The motor 7 can drive the rotating shaft 8 to rotate by rotating, thereby driving the valve plate 5 to rotate. When the valve plate 5 contacts and cooperates with the sealing baffle 2 9, the filter component 2 in the secondary channel 3 performs exhaust gas filtering. When the valve plate 5 contacts and cooperates with the sealing baffle 1 6, the filter component 2 in the main channel 1 performs exhaust gas filtering. Moreover, when the amount of gas discharged from the chimney is large, the valve plate 5 can be placed in the middle position, and the filter components 2 in the main channel 1 and the secondary channel 3 are filtered synchronously. In addition, there are two fluid channels in the tubular heat exchanger, one of which is connected to the heat exchange tube 15 to form a circulation loop, and the other fluid channel is connected to the heat energy recovery point to recover heat energy. Therefore, when the fluid pump 14 is started, it can drive the heat exchange tube 15 and the fluid in the fluid channel connected to the heat exchange tube 15 and the heat exchanger 13 to circulate, thereby driving the gas heat in the main channel 1, the temperature rises, and then the fluid with the increased temperature is transferred to the other fluid channel, from To achieve heat exchange, the fluid in the other channel after the exchange can be used for preheating of the boiler. The channel can also be directly connected to cold water to achieve hot water supply. The fluid in the flow channel can also be set to gas, and then the technical means in the utility model patent with announcement number CN221166658U are used to recover heat. At the same time, the smoke sensor 10 will monitor the smoke concentration at the air inlet of the main channel 1 in real time. When the smoke concentration is higher than the threshold, the motor 7 will be controlled to change the position of the valve plate 5, so that the main channel 1 and the auxiliary channel 3 perform dual-channel filtering mode to reduce the filtering load of the single channel. When the pressure monitored by the air pressure sensor 17 is large, it means that the filtering load in the current state is high or some filter components 2 are blocked. The motor 7 is controlled to change the position of the valve plate 5, switch the channel, and notify the staff to perform maintenance. The temperature sensor 12 will monitor the intake temperature of the main channel 1 in real time. When the intake temperature is higher, it will control the power of the fluid pump 14 to increase, increase the flow rate of the fluid, increase the heat exchange rate, and ensure the heat recovery rate, and vice versa.

[0047] Embodiment 2: A continuous waste gas recovery and treatment device. This embodiment makes the following improvements on the basis of embodiment 1: Figure 1-5 As shown, the filter components 2 in the main channel 1 and the filter components 2 in the secondary channel 3 are arranged in multiple groups, and the mesh number of each group of filter components 2 increases along the gas processing direction.

[0048] The device is provided with a plurality of groups of filter components 2, and the mesh size of each group of filter components 2 increases gradually along the gas processing direction, so that impurities of different particle sizes in the smoke can be filtered step by step from large to small, thereby reducing the filtering load of each group of filter components 2 and delaying the maintenance cycle.

[0049] In this embodiment, the filter assembly 2 includes a baffle ring 18 and a baffle ring 21 fixed to the inner walls of the main channel 1 and the secondary channel 3. A filter plate 19 slidably connected to the inner walls of the main channel 1 and the secondary channel 3 is provided on the opposite side of the baffle ring 18 and the baffle ring 21. The filter plate 19 is connected to the baffle ring 21 through a spring 1 20.

[0050] The side walls of the main channel 1 and the secondary channel 3 are provided with a limiting assembly 22 for limiting the filter plate 19. The limiting assembly 22 includes an outer shell 23 fixed to the side walls of the main channel 1 and the secondary channel 3 and a slide plate 25 slidably connected to the inner wall of the outer shell 23. A spring 24 is provided on one side of the slide plate 25, and the other end of the spring 24 is buckled to the inner wall of the outer shell 23. An arc head limiting rod 16 for limiting the filter plate 19 is fixed to the other side of the slide plate 25.

[0051] In this embodiment: when the filter plate 19 is filtering, it will be moved to the side close to the retaining ring 21 by the force of the fluid, so that the spring 20 is compressed. When the boiler stops exhausting smoke, the pressure of the smoke is small, so that the elastic force of the spring 20 on the filter plate 19 is greater than the limiting force of the arc head limiting rod 16 on the filter plate 19, and the filter plate 19 rebounds quickly, and the filtered smoke particles are shaken off by the impact force between the filter plate 19 and the retaining ring 18 when it rebounds.

[0052] The device achieves the purpose of self-cleaning by configuring the filter assembly 2 as a combination of a retaining ring 18, a filter plate 19 and a retaining ring 21, so that after a single use, the filtered smoke particles can be shaken off by the impact force of the filter plate 19 and the retaining ring 18 when the filter plate 19 rebounds, thereby achieving the purpose of self-cleaning.

Claims

1. A continuous waste gas recovery and treatment device, characterized in that: It comprises a main channel (1) connected to a boiler chimney and a secondary channel (3) welded and connected to one side of the main channel (1), wherein a filter assembly (2) is arranged inside the main channel (1) and the secondary channel (3), and a valve assembly (4) is arranged at the connection between the main channel (1) and the secondary channel (3); The valve assembly (4) comprises a sealing baffle plate 2 (9) fixed to the inner wall of the main channel (1), a sealing baffle plate 1 (6) fixed to the inner wall of the secondary channel (3), and a valve plate (5) matched with the sealing baffle plate 1 (6) and the sealing baffle plate 2 (9), a rotating shaft (8) being fixed to one side of the valve plate (5), the rotating shaft (8) being rotatably connected to the inner wall of the main channel (1), and a motor (7) being fixed to the outer wall of the main channel (1) by means of bolts, the output shaft of the motor (7) being connected to the end of the rotating shaft (8) by means of a coupling.

2. A continuous waste gas recovery and treatment device according to claim 1, characterized in that: A heat recovery component (11) is arranged upstream of the connection between the main channel (1) and the secondary channel (3); the heat recovery component (11) comprises a heat exchange tube (15) fixed to the inner wall of the main channel (1) and a heat exchanger (13) fixed to the side wall of the heat exchange tube (15); a fluid pump (14) is arranged at the connection between the heat exchanger (13) and the heat exchange tube (15).

3. A continuous waste gas recovery and treatment device according to claim 2, characterized in that: The main channel (1) is provided with a smoke sensor (10) at a position upstream of the connection between the main channel (1) and the secondary channel (3).

4. A continuous waste gas recovery and treatment device according to claim 3, characterized in that: The main channel (1) is provided with a temperature sensor (12) at a position upstream of the connection between the main channel (1) and the secondary channel (3).

5. A continuous waste gas recovery and treatment device according to claim 4, characterized in that: The main channel (1) is provided with an air pressure sensor (17) at a position upstream of the connection between the main channel (1) and the secondary channel (3).

6. A continuous waste gas recovery and treatment device according to claim 5, characterized in that: The smoke sensor (10), the temperature sensor (12), and the air pressure sensor (17) are connected to a control cabinet, which is controlled and connected to the motor (7) and the fluid pump (14), and has a signal receiver, a central processing unit, and a controller built into the control cabinet.

7. The continuous waste gas recovery and treatment device according to claim 1, characterized in that: The filter components (2) in the main channel (1) and the filter components (2) in the secondary channel (3) are arranged in multiple groups, and the mesh size of each group of filter components (2) increases along the gas processing direction.

8. The continuous waste gas recovery and treatment device according to claim 7, characterized in that: The filter assembly (2) comprises a first retaining ring (18) and a second retaining ring (21) fixed to the inner walls of the main channel (1) and the secondary channel (3); a filter plate (19) slidably connected to the inner walls of the main channel (1) and the secondary channel (3) is provided on the opposite side of the first retaining ring (18) and the second retaining ring (21); the filter plate (19) is connected to the second retaining ring (21) via a first spring (20).

9. A continuous waste gas recovery and treatment device according to claim 8, characterized in that: The side walls of the main channel (1) and the secondary channel (3) are provided with a limiting assembly (22) for limiting the position of the filter plate (19).

10. A continuous waste gas recovery and treatment device according to claim 9, characterized in that: The limiting assembly (22) comprises an outer shell (23) fixed to the side walls of the main channel (1) and the auxiliary channel (3), and a slide plate (25) slidably connected to the inner wall of the outer shell (23), a second spring (24) being provided on one side of the slide plate (25), the other end of the second spring (24) being buckled to the inner wall of the outer shell (23), and an arc-shaped limiting rod (16) for limiting the filter plate (19) being fixed on the other side of the slide plate (25).

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