Combined switching control system and method for rotating wheel concentration and adsorption recovery system
Through the joint switching control of the rotor concentration and adsorption and recovery system, the problem that equipment in low-concentration and high-air exhaust gas treatment is difficult to meet the working conditions, and the effect of energy saving and consumption reduction and emission compliance is achieved.
Patent Information
- Application Number
- CN202510684782.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2025-07-25
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In industries such as pharmaceuticals, printing and fine chemicals, under low concentration and high air volume waste gas treatment conditions, existing equipment is difficult to meet the working conditions requirements at the same time, resulting in waste of energy and high operating costs.
The joint switching control system of the rotor concentration and adsorption recovery system is adopted. Through the control of the switching valve, the series and parallel switching of the concentration rotor and the activated carbon adsorber are realized. The working mode is automatically adjusted according to the VOCs concentration and air volume to meet the needs of different working conditions.
It achieves energy saving, reduce operating costs, meet emission standards under different working conditions, and improves the efficiency and economicality of waste gas treatment.
Smart Images
Figure CN120361674A_ABST
Abstract
Description
Technical Field
[0001] This invention patent relates to the technical field of flue gas recovery, and particularly to a combined switching control system and method for a rotary concentrator and an adsorption recovery system. Background Art
[0002] In industries such as pharmaceuticals, printing, and fine chemicals, there are many low-concentration, large-volume waste gas treatment conditions. Some VOCs waste gas components are relatively simple, and the pollutants are one or several with similar properties, having the value of recyclable reuse. However, due to large fluctuations in the air volume and concentration of the working conditions, a single set of equipment cannot meet such conditions simultaneously, or wastes a lot of energy, resulting in enterprises being unable to bear the operating costs of the recovery system. Summary of the Invention
[0003] The present invention provides a combined switching control system for a rotary concentrator and an adsorption recovery system.
[0004] To achieve the above object, the present invention adopts the following technical solutions: A combined switching control system for a rotary concentrator and an adsorption recovery system includes a concentrator rotor and an activated carbon adsorber. The inlet of the adsorption zone of the concentrator rotor is connected to one end of a connecting pipeline 1. The outlet of the desorption zone of the concentrator rotor is connected to one end of a connecting pipeline 3. The outlet of the adsorption zone of the concentrator rotor is connected to an exhaust pipeline. The inlet of the desorption zone of the concentrator rotor is connected to the outlet of an incinerator. The other end of the connecting pipeline 1 is connected to an intake main pipe. The intake main pipe is also connected to one end of a connecting pipeline 2. The other end of the connecting pipeline 2 is connected to one end of at least two activated carbon adsorbers. The other end of the activated carbon adsorber is connected to one end of a connecting pipeline 6. The other end of the connecting pipeline 6 is connected to one interface of a three-way connector. The other interface of the three-way connector is connected to one end of a connecting pipeline 5. The other end of the connecting pipeline 5 is also connected to the connecting pipeline 1. The last interface of the three-way connector is connected to one end of a connecting pipeline 4. The other end of the connecting pipeline 4 is connected to the exhaust pipeline. One end of the activated carbon adsorber is provided with a three-way connector 1, and the other end of the activated carbon adsorber is provided with a three-way connector 2. The largest interface of the three-way connector 1 is connected to the box body of the activated carbon adsorber. Another interface of the three-way connector 1 is connected to the connecting pipeline 2. The last interface of the three-way connector 1 is connected to the inlet 1 of a cooler. The largest interface of the three-way connector 2 is connected to the box body of the activated carbon adsorber. Another interface of the three-way connector 2 is connected to the connecting pipeline 6. The last interface of the three-way connector 2 is connected to the inlet of steam. A switching valve 1 is installed at the connection between the intake main pipe and the connecting pipeline 1. A switching valve 2 is installed at the connection between the intake main pipe and the connecting pipeline 2. A switching valve 3 is installed at the connection between the three-way connector and the connecting pipeline 4. A switching valve 4 is installed at the connection between the three-way connector and the connecting pipeline 5.
[0005] Further, there are two activated carbon adsorbers. A control valve I is installed at the connection between the first three-way connector of one activated carbon adsorber and the second connecting pipeline. A control valve VII is installed at the connection between the first three-way connector of this activated carbon adsorber and the cooler. A control valve V is installed at the connection between the second three-way connector of this activated carbon adsorber and the steam inlet. A control valve III is installed at the connection between the second three-way connector of this activated carbon adsorber and the sixth connecting pipeline. A control valve II is installed at the connection between the first three-way connector of the other activated carbon adsorber and the second connecting pipeline. A control valve VIII is installed at the connection between the first three-way connector of this activated carbon adsorber and the cooler. A control valve VI is installed at the connection between the second three-way connector of this activated carbon adsorber and the steam inlet. A control valve IV is installed at the connection between the second three-way connector of this activated carbon adsorber and the sixth connecting pipeline.
[0006] Further, a three-way connector III is provided at the connection between the second three-way connector and the sixth connecting pipeline. The three-way connector III is arranged between the second three-way connector and the control valve III. One interface of the three-way connector III is connected to the second three-way connector. Another interface of the three-way connector III is connected to the sixth connecting pipeline. The last interface of the three-way connector III is connected to one end of a series pipeline. The other end of the series pipeline is connected to the first three-way connector of the other activated carbon adsorber. This three-way connector I is connected to one interface of a three-way connector IV. The three-way connector IV is arranged between the first three-way connector and the control valve II. Another interface of the three-way connector IV is connected to the second connecting pipeline. The last interface of the three-way connector IV is connected to the other end of the series pipeline. A control valve IX is installed on the series pipeline.
[0007] Further, a filter is installed on the intake main pipeline, and a monitoring device I is installed at the intake port of the filter.
[0008] Further, the end of the exhaust pipeline is connected to a chimney, and a monitoring device II is installed on the exhaust main pipeline between the connection between the fourth connecting pipeline and the exhaust main pipeline and the chimney.
[0009] Further, there are two coolers. The activated carbon adsorber is connected to the gas-phase inlet of one cooler. The gas-phase outlet of this activated carbon adsorber is connected to the gas-phase inlet of the other activated carbon adsorber. The gas-phase outlet of this activated carbon adsorber is connected to the inlet of a separation tank. The liquid-phase inlets of both activated carbon adsorbers are connected to a cooling water supply system, and the liquid-phase outlets of both activated carbon adsorbers are connected to a cooling water return system.
[0010] Further, the outlet of the separation tank is connected to a solvent recovery system.
[0011] Further, the activated carbon adsorber includes a box body. An activated carbon adsorption group is installed inside the box body. Both ends of the box body are open. A three-way connector is installed at each of the two open ends of the box body. The three-way connector includes a connecting hopper. One end of the connecting hopper is connected to the box body, and the other end of the connecting hopper is connected to a communicating pipe. The other end of the communicating pipe is communicated with the middle of a connecting pipe. The activated carbon adsorption group includes a number of frame units. The frame unit includes a rectangular frame. Filter side plates are arranged on the front side and the rear side of the rectangular frame. Filter end plates are arranged on the left side and the right side of the rectangular frame. Adjacent two frame units are connected by a connecting rod. A blocking plate is arranged at the end of the frame unit. The blocking plate is fixed in the gas passing channels at the ends of adjacent two frame units. The blocking plates are arranged staggeredly at the ends of the frame units.
[0012] According to the data of the VOCs monitor (monitoring device 1) on the intake main pipe, when the concentration and air volume are below a certain set value, such as the concentration < 300 mg / m³ and the air volume > 5000 m³ / h, the system adopts mode two (concentrate first and then recover), that is, switching valve one is opened, switching valve two is closed, switching valve three is opened, and switching valve four is closed. The flue gas first enters the adsorption area of the concentrator wheel through connecting pipeline one for adsorption. The adsorbed flue gas enters the exhaust main pipe and is finally discharged through the chimney. Then, the high-temperature gas generated by the incinerator is used for desorption in the desorption area, so that the flue gas is concentrated into a small air volume and high concentration. Then it enters connecting pipeline two through connecting pipeline three, and enters the activated carbon adsorber through connecting pipeline two. In the activated carbon adsorber, the activated carbon in the activated carbon adsorption group purifies the concentrated flue gas. The purified flue gas enters the exhaust pipeline through connecting pipeline four and is finally discharged through the chimney. According to the data of monitoring device 2, when the emission concentration exceeds 80% of the emission standard, the system will switch to mode one, that is, switching valve two is opened, switching valve one is closed, switching valve four is opened, and switching valve three is closed.
[0013] Advantages: Through the switching of the two modes of the present invention, different working conditions are satisfied and energy is saved. Description of the Drawings
[0014] Figure 1 It is the overall schematic diagram of the present invention; Figure 2 It is the schematic diagram of mode two of the present invention; Figure 3 It is the schematic diagram of mode one of the present invention; Figure 4 It is the schematic diagram when two adsorbers are connected in series for adsorption in the present invention; Figure 5 It is the schematic diagram when two adsorbers are adsorbed separately in the present invention; Figure 6Schematic diagram of the first adsorber for adsorption and the second adsorber for recovery in the present invention; Figure 7 Stereogram of the activated carbon adsorber in the present invention Figure 1 ; Figure 8 Stereogram of the activated carbon adsorber in the present invention Figure 2 ; Figure 9 Cross-sectional view of the activated carbon adsorber in the present invention; Figure 10 In the present invention Figure 7 Stereogram of the activated carbon adsorption group in Figure 1 ; Figure 11 In the present invention Figure 7 Stereogram of the activated carbon adsorption group in Figure 2 ; Figure 12 In the present invention Figure 7 Stereogram of the activated carbon adsorption group in Figure 3 ; Figure 13 In the present invention Figure 7 Stereogram of the activated carbon adsorption group in Figure 4 ; Figure 14 In the present invention Figure 7 Stereogram of the filter screen assembly.
[0015] In the figure: 1 filter, 2 first monitoring device, 3 concentrator wheel, 4 incinerator, 5 activated carbon adsorber, 6 cooler, 7 stratification tank, 8 first switching valve, 9 second switching valve, 10 third switching valve, 11 fourth switching valve, 12 second monitoring device, 13 chimney, 14 first connecting pipeline, 15 second connecting pipeline, 16 third connecting pipeline, 17 fourth connecting pipeline, 18 fifth connecting pipeline, 19 exhaust pipeline, 20 first control valve, 21 second control valve, 22 third control valve, 23 fourth control valve, 24 fifth control valve, 25 sixth control valve, 26 seventh control valve, 27 eighth control valve; 501 box body, 502 support leg, 503 activated carbon adsorption group, 504 filter screen assembly, 505 three-way connector, 506 feed cover, 507 discharge cover; 50301 frame unit, 50302 filter side plate, 50303 connecting rod, 50304 plug plate, 50305 filter end plate, 50306 discharge plate; 50401 fixing part, 50402 installation frame, 50403 filter screen. Detailed implementation manners
[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0017] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.
[0018] Refer to Figure 1 -14 shows the combined switching control system of the rotary wheel concentration and adsorption recovery system in Embodiment 1 of the present invention, including a concentration rotary wheel 3 and an activated carbon adsorber 5. The inlet of the adsorption zone of the concentration rotary wheel 3 is connected to one end of a connecting pipeline 14. The outlet of the desorption zone of the concentration rotary wheel 3 is connected to one end of a connecting pipeline 16. The outlet of the adsorption zone of the concentration rotary wheel 3 is connected to an exhaust pipeline 19. The inlet of the desorption zone of the concentration rotary wheel 3 is connected to the gas outlet of an incinerator 4. The other end of the connecting pipeline 14 is connected to an intake main pipe. The intake main pipe is also connected to one end of a connecting pipeline 15. The other end of the connecting pipeline 15 is connected to one end of at least two activated carbon adsorbers 5. The other end of the activated carbon adsorber 5 is connected to one end of a connecting pipeline 6. The other end of the connecting pipeline 6 is connected to one interface of a three-way connector. The other interface of the three-way connector is connected to one end of a connecting pipeline 18. The other end of the connecting pipeline 18 is also communicated with the connecting pipeline 14. The last interface of the three-way connector is connected to one end of a connecting pipeline 17. The other end of the connecting pipeline 17 is connected to the exhaust pipeline 19. One end of the activated carbon adsorber 5 is provided with a three-way connector 505 one, and the other end of the activated carbon adsorber 5 is provided with a three-way connector 505 two. The largest interface of the three-way connector 505 one is connected to the box body 501 of the activated carbon adsorber 5. The other interface of the three-way connector 505 one is connected to the connecting pipeline 15. The last interface of the three-way connector 505 one is connected to the first inlet of a cooler 6. The largest interface of the three-way connector 505 two is connected to the box body 501 of the activated carbon adsorber 5. The other interface of the three-way connector 505 two is connected to the connecting pipeline 6. The last interface of the three-way connector 505 two is connected to the inlet of water vapor. A switching valve 8 is installed at the connection between the intake main pipe and the connecting pipeline 14. A switching valve 9 is installed at the connection between the intake main pipe and the connecting pipeline 15. A switching valve 10 is installed at the connection between the three-way connector and the connecting pipeline 17. A switching valve 11 is installed at the connection between the three-way connector and the connecting pipeline 18.
[0019] Refer to Figures 1 - 3, this application provides an embodiment. There are two activated carbon adsorbers 5. A control valve one 20 is installed at the connection between the three-way connector 505 one of one activated carbon adsorber 5 and the connecting pipeline two 15. A control valve seven 26 is installed at the connection between the three-way connector 505 one of this activated carbon adsorber 5 and the cooler 6. A control valve five 24 is installed at the connection between the three-way connector 505 two of this activated carbon adsorber 5 and the inlet of water vapor. A control valve three 22 is installed at the connection between the three-way connector 505 two of this activated carbon adsorber 5 and the connecting pipeline six.
[0020] Refer to Figures 4 - 6 , this application provides an embodiment. A three-way connector three is provided at the connection between the three-way connector 505 two and the connecting pipeline six. The three-way connector three is arranged between the three-way connector 505 two and the control valve three 22. One interface of the three-way connector three is connected to the three-way connector 505 two. Another interface of the three-way connector three is connected to the connecting pipeline six. The last interface of the three-way connector three is connected to one end of the series pipe 28. The other end of the series pipe 28 is connected to the three-way connector 505 one of another activated carbon adsorber 5. This three-way connector 505 one is connected to one interface of a three-way connector four. The three-way connector four is arranged between the three-way connector 505 one and the control valve two 21. Another interface of the three-way connector four is connected to the connecting pipeline two 15. The last interface of the three-way connector four is connected to the other end of the series pipe 28. A control valve nine 29 is installed on the series pipe 28. A control valve two 21 is installed at the connection between the three-way connector 505 one of another activated carbon adsorber 5 and the connecting pipeline two 15. A control valve eight 27 is installed at the connection between the three-way connector 505 one of this activated carbon adsorber 5 and the cooler 6. A control valve six 25 is installed at the connection between the three-way connector 505 two of this activated carbon adsorber 5 and the inlet of water vapor. A control valve four 23 is installed at the connection between the three-way connector 505 two of this activated carbon adsorber 5 and the connecting pipeline six.
[0021] Refer to Figure 1 , this application provides an embodiment. A filter 1 is installed on the intake main pipe. A monitoring device one 2 is installed at the intake port of the filter 1. The intake main pipe is connected to the outlet end of the production line. Both the monitoring device one 2 and the monitoring device two 12 are VOCs monitors. The end of the exhaust pipeline 19 is connected to the chimney 13. A monitoring device two 12 is installed on the exhaust pipeline between the connection between the connecting pipeline four 17 and the exhaust pipeline and the chimney 13.
[0022] The present application provides an embodiment. There are two coolers 6 provided. The activated carbon adsorber 5 is connected to the gas-phase inlet of one cooler 6. The gas-phase outlet of this activated carbon adsorber 5 is connected to the gas-phase inlet of another activated carbon adsorber 5. The gas-phase outlet of this activated carbon adsorber 5 is connected to the inlet of the stratification tank 7. The liquid-phase inlets of the two activated carbon adsorbers 5 are both connected to the cooling water supply system. The liquid-phase outlets of the two activated carbon adsorbers 5 are both connected to the cooling water return system. The outlet of the stratification tank 7 is connected to the solvent recovery system.
[0023] The present application provides an embodiment. Referring to Figures 7 - 13 , the activated carbon adsorber 5 includes a box body 501. The box body 501 is internally filled with an activated carbon adsorption group 503. Both ends of the box body 501 are open. A three-way connector 505 is installed at each of the two open ends of the box body 501. The three-way connector 505 includes a connecting hopper. One end of the connecting hopper is connected to the box body 501, and the other end of the connecting hopper is connected to a communicating pipe. The other end of the communicating pipe is communicated with the middle of a connecting pipe. The activated carbon adsorption group 503 includes a number of frame units 50301. Activated carbon is provided in each frame unit 50301. The frame unit 50301 includes a rectangular frame. Filter side plates 50302 are provided on the front side and the rear side of the rectangular frame. Filter end plates 50305 are provided on the left side and the right side of the rectangular frame. Adjacent two frame units 50301 are connected by a connecting rod 50303. A blocking plate 50304 is provided at the end of the frame unit 50301. The blocking plate 50304 is fixed in the gas passing channels between adjacent two frame units 50301. The blocking plates 50304 are staggeredly arranged at the ends of the frame unit 50301.
[0024] The present application provides an embodiment. Referring to Figures 10 - 13 , the blocking plates 50304 on both sides of the activated carbon adsorption group 503 are asymmetric, that is, a blocking plate 50304 is fixed at one end of the gas passing channel between adjacent two frame units 50301, and there is no blocking plate 50304 at the other end of the gas passing channel. One blocking plate 50304 is fixed on each side at one end of the activated carbon adsorption group 503. This blocking plate 50304 is fixedly connected to the inner wall of the box body 501. A number of feed inlets for loading activated carbon are provided on the upper part of the box body 501. A number of discharge inlets for discharging activated carbon are provided on the lower part of the box body 501. A feed inlet is provided above each frame unit 50301. A discharge plate 50306 is installed at the bottom of each frame unit 50301. A discharge outlet is provided below each frame unit 50301. The feed inlet is equipped with a feed cover 506, and the discharge outlet is equipped with a discharge cover 507. Legs 502 are fixed at the bottom of the box body 501.
[0025] The present application provides an embodiment. Referring toFigures 7 - 14 Inside the box body 501, a filter assembly 504 is fixed. The filter assembly 504 includes two groups of fixing members 50401. Each group of fixing members 50401 includes two symmetrically arranged angle steels. An installation frame 50402 is fixed between the two angle steels. One group of fixing members 50401 is fixed at each of the upper and lower ends of the installation frame 50402. A filter screen 50403 is installed inside the installation frame 50402. The fixing members 50401 are fixedly connected to the inner wall of the box body 501.
[0026] According to the adsorption and recovery characteristics of the rotary concentrator and the activated carbon adsorber 5, two sets of systems are used in series. According to the inlet air volume of the system and the concentration of the VOCs analyzer, the system has two automatically switchable modes.
[0027] Mode 1: The switching valve II 9 is opened, the switching valve I 8 is closed, the switching valve IV 11 is opened, and the switching valve III 10 is closed. After the flue gas passes through the intake main pipe and the filter 1, it enters the activated carbon adsorber 5 through the connecting pipe II 15, is adsorbed by the activated carbon in the activated carbon adsorber 5, then enters the connecting pipe V 18 through the connecting pipe VI, enters the connecting pipe I 14 through the connecting pipe V 18, enters the adsorption zone of the concentrator wheel 3 through the connecting pipe I 14 for adsorption. The adsorbed flue gas is discharged into the chimney 13 through the exhaust pipe. After the desorption zone of the concentrator wheel 3 enters the high-temperature gas of the incinerator 4, desorption occurs. The desorbed flue gas enters the connecting pipe II 15 through the connecting pipe III 16, and then enters the activated carbon adsorber 5 for adsorption through the connecting pipe II 15, and the cycle is repeated to complete the purification of the flue gas.
[0028] Mode 2: The switching valve I 8 is opened, the switching valve II 9 is closed, the switching valve III 10 is opened, and the switching valve IV 11 is closed. After the flue gas passes through the intake main pipe and the filter 1, it enters the adsorption zone of the concentrator wheel 3 through the connecting pipe I 14 for adsorption. The adsorbed flue gas is discharged into the chimney 13 through the exhaust pipe. After the desorption zone of the concentrator wheel 3 enters the high-temperature gas of the incinerator 4, desorption occurs. The desorbed flue gas enters the connecting pipe II 15 through the connecting pipe III 16, and then enters the activated carbon adsorber 5 for adsorption through the connecting pipe II 15. After adsorption, it enters the connecting pipe IV 17 through the connecting pipe VI, and enters the exhaust pipe through the connecting pipe IV 17 and then is discharged into the chimney 13.
[0029] According to the data of the VOCs monitor (monitoring device 1 2) on the intake manifold, when the concentration and air volume are below a certain set value, such as concentration < 300 mg / m³ and air volume > 5000 m³ / h, the system adopts Mode 2 (concentrate first and then recover), that is, switching valve 1 8 is opened, switching valve 2 9 is closed, switching valve 3 10 is opened, and switching valve 4 11 is closed. The flue gas first enters the adsorption zone of the concentrator wheel 3 through connecting pipeline 1 14 for adsorption. The adsorbed flue gas enters the exhaust pipeline and is finally discharged through the chimney 13. Then, the high-temperature gas generated by the incinerator 4 is used for desorption in the desorption zone, so that the flue gas is concentrated into a small air volume and high concentration. Then it enters connecting pipeline 2 15 through connecting pipeline 3 16, and enters the activated carbon adsorber 5 through connecting pipeline 2 15. In the activated carbon adsorber 5, the activated carbon in the activated carbon adsorption group 503 purifies the concentrated flue gas. The purified flue gas enters the exhaust pipeline 19 through connecting pipeline 4 17 and is finally discharged through the chimney 13. Since the operating cost of the activated carbon adsorber 5 recovery system accounts for a relatively large proportion, and is directly proportional to the inlet air volume of the activated carbon adsorber 5 recovery system and inversely proportional to the concentration. After the concentration by the concentrator wheel, the inlet air volume of the recovery system < 500 m³ / h and the concentration > 3000 mg / m³, the system has economic benefits.
[0030] In this case, when the system concentration or air volume fluctuates, the concentration is taken as the main reference. The air volume can be adjusted by frequency conversion control of each fan in the system within the range of 30 - 50 Hz to keep the concentration at the optimal value and the air volume (workshop exhaust effect) within an acceptable range. The outlet of the adsorption zone of the concentrator wheel 3 is connected to the inlet of fan 1, and the outlet of fan 1 is connected to the exhaust pipeline. The inlet of the regeneration zone of the concentrator wheel 3 is connected to the outlet of fan 2, and the outlet of the regeneration zone is connected to the inlet of the incinerator 4.
[0031] According to the data of the VOCs monitor 2 (i.e., monitoring device 2 12), when the emission concentration exceeds 80% of the emission standard (such as when the emission standard is 60 mg / Nm³ and the outlet data is greater than 60 * 0.8 = 48 mg / Nm³), the system will switch to Mode 1 (recover first and then rotate), that is, switching valve 2 9 is opened, switching valve 1 8 is closed, switching valve 4 11 is opened, and switching valve 3 10 is closed. In this working condition, the waste gas concentration is first adsorbed and recovered, and then adsorbed by the concentrator wheel and discharged, which can ensure that the emission meets the environmental protection standards.
[0032] At this time, the recovery system has two mode matches, and the number of adsorption units of the adsorption system is adjusted according to the data of the VOCs monitor (monitoring device 1 2): ① When the air volume (> 3000 m³ / h) and the concentration 800 mg / m³ < concentration < 1500 mg / m³, single-stage adsorption is adopted, that is, at least one adsorption unit is opened for adsorption; Taking a system with two activated carbon adsorbers 5 as an example, for the convenience of introduction, they are marked as Adsorber One (on the left) and Adsorber Two (on the right). Each activated carbon adsorber 5 is equipped with a usage time accumulation module. At this time, the system compares the values of the usage time accumulation modules of each activated carbon adsorber 5. When the usage time accumulation modules of both activated carbon adsorbers 5 are less than the recovery threshold, and the cumulative usage times of both activated carbon adsorbers 5 are less than 50% of the recovery threshold, the system uses both activated carbon adsorbers 5 for adsorption and recovery. The control valve one 20 and control valve three 22 of Adsorber One are opened, the control valve four 23 and control valve of Adsorber One are closed, the control valve two 21 and control valve four 23 of Adsorber Two are opened, and the control valve six 25 and control valve eight 27 are closed. The flue gas is purified by the activated carbon in the two adsorbers; when the cumulative usage time of one of the activated carbon adsorbers 5 ≥ 90% of the recovery threshold, for example, the cumulative usage time of Adsorber Two ≥ 90% of the recovery threshold, the system recovers Adsorber Two. The control valve two 21 and control valve four 23 of Adsorber Two are closed, and the control valve six 25 and control valve eight 27 are opened. The solvent in the activated carbon adsorber 5 is recovered by steam, and the recovered gas enters the two coolers 6 for condensation and then enters the separation tank 7; When the cumulative usage times of both activated carbon adsorbers 5 are greater than 50% of the recovery threshold, the system selects the activated carbon adsorber 5 with the smaller value in the usage time accumulation module. For example, the cumulative usage time of Adsorber One is less than that of Adsorber Two. The control valve one 20 and control valve three 22 of Adsorber One are opened, and the control valve four 23 and control valve of Adsorber One are closed. In this state, the system recovers Adsorber Two. The control valve two 21 and control valve four 23 of Adsorber Two are closed, and the control valve six 25 and control valve eight 27 are opened. The solvent in the activated carbon adsorber 5 is recovered by steam, and the recovered gas enters the two coolers 6 for condensation and then enters the separation tank 7. After the recovery of Adsorber Two is completed, the usage time accumulation module of Adsorber Two is cleared, and then the system uses Adsorber Two for adsorption. The control valve two 21 and control valve four 23 of Adsorber Two are opened, and the control valve six 25 and control valve eight 27 are closed. Then, Adsorber One is recovered. The control valve one 20 and control valve three 22 of Adsorber One are closed, and the control valve four 23 and control valve of Adsorber One are opened. The solvent in the activated carbon adsorber 5 is recovered by steam, and the recovered gas enters the two coolers 6 for condensation and then enters the separation tank 7; ② For the air volume (< 3000 m³ / h) and concentration (concentration > 1500 mg / m³), double-stage adsorption is adopted, that is, the adsorption units are connected in series in two stages. In this state, the cumulative service time of the adsorber is not considered. At this time, control valve 1-20 is opened, control valve 2-21 is closed, control valve 3-22 is closed, control valve 4-23 is opened, control valve 5-24 is closed, control valve 6-25 is closed, control valve 7-26 is closed, control valve 8-27 is closed, and control valve 9-29 is opened. At this time, the flue gas enters the first adsorber from one end of control valve 1-20 of the first adsorber, then enters the series pipe 28 and enters the second adsorber, and is discharged through control valve 4-23 of the second adsorber.
[0033] As mentioned above, the above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.
Claims
1. A combined switching control system for a rotating wheel concentration and adsorption recovery system, characterized in that, It includes a concentrator wheel and an activated carbon adsorber. The inlet of the adsorption zone of the concentrator wheel is connected to one end of the connecting pipeline 1. The outlet of the desorption zone of the concentrator wheel is connected to one end of the connecting pipeline 3. The outlet of the adsorption zone of the concentrator wheel is connected to the exhaust pipeline. The inlet of the desorption zone of the concentrator wheel is connected to the gas outlet of the incinerator. The other end of the connecting pipeline 1 is connected to the intake main pipe. The intake main pipe is also connected to one end of the connecting pipeline 2. The other end of the connecting pipeline 2 is connected to one end of at least two activated carbon adsorbers. The other end of the activated carbon adsorber is connected to one end of the connecting pipeline 6. The other end of the connecting pipeline 6 is connected to one interface of a three-way connector. The other interface of the three-way connector is connected to one end of the connecting pipeline 5. The other end of the connecting pipeline 5 is also connected and communicated with the connecting pipeline 1. The last interface of the three-way connector is connected to one end of the connecting pipeline 4. The other end of the connecting pipeline 4 is connected to the exhaust pipeline. One end of the activated carbon adsorber is provided with a three-way connector 1, and the other end of the activated carbon adsorber is provided with a three-way connector 2. The largest interface of the three-way connector 1 is connected to the box body of the activated carbon adsorber. The other interface of the three-way connector 1 is connected to the connecting pipeline 2. The last interface of the three-way connector 1 is connected to the inlet 1 of the cooler. The largest interface of the three-way connector 2 is connected to the box body of the activated carbon adsorber. The other interface of the three-way connector 2 is connected to the connecting pipeline 6. The last interface of the three-way connector 2 is connected to the inlet of the water vapor. A switching valve 1 is installed at the connection between the intake main pipe and the connecting pipeline 1. A switching valve 2 is installed at the connection between the intake main pipe and the connecting pipeline 2. A switching valve 3 is installed at the connection between the three-way connector and the connecting pipeline 4. A switching valve 4 is installed at the connection between the three-way connector and the connecting pipeline 5.
2. The combined switching control system of a rotating wheel concentration and adsorption recovery system according to claim 1, wherein: There are two activated carbon adsorbers. A control valve 1 is installed at the connection between the three-way connector 1 of one activated carbon adsorber and the connecting pipeline 2. A control valve 7 is installed at the connection between the three-way connector 1 of this activated carbon adsorber and the cooler. A control valve 5 is installed at the connection between the three-way connector 2 of this activated carbon adsorber and the inlet of the water vapor. A control valve 3 is installed at the connection between the three-way connector 2 of this activated carbon adsorber and the connecting pipeline 6. A control valve 2 is installed at the connection between the three-way connector 1 of the other activated carbon adsorber and the connecting pipeline 2. A control valve 8 is installed at the connection between the three-way connector 1 of this activated carbon adsorber and the cooler. A control valve 6 is installed at the connection between the three-way connector 2 of this activated carbon adsorber and the inlet of the water vapor. A control valve 4 is installed at the connection between the three-way connector 2 of this activated carbon adsorber and the connecting pipeline 6.
3. A combined switching control system for a rotary wheel concentration and adsorption recovery system according to claim 2, characterized in that: A three-way connector three is provided at the connection between the three-way connector two and the connecting pipeline six. The three-way connector three is arranged between the three-way connector two and the control valve three. One interface of the three-way connector three is connected to the three-way connector two, another interface of the three-way connector three is connected to the connecting pipeline six, and the last interface of the three-way connector three is connected to one end of a series pipe. The other end of the series pipe is connected to a three-way connector one of another activated carbon adsorber. This three-way connector one is connected to one interface of a three-way connector four. The three-way connector four is arranged between the three-way connector one and the control valve two. Another interface of the three-way connector four is connected to the connecting pipeline two, and the last interface of the three-way connector four is connected to the other end of the series pipe. A control valve nine is installed on the series pipe.
4. A combined switching control system for a rotating wheel concentration and adsorption recovery system according to claim 1, characterized in that: A filter is installed on the intake main pipe, and a monitoring device one is installed at the intake port of the filter.
5. A combined switching control system for a rotary concentrator and adsorption recovery system according to claim 1, characterized in that: The end of the exhaust pipeline is connected to a chimney, and a monitoring device two is installed on the exhaust main pipe between the connection between the connecting pipeline four and the exhaust main pipe and the chimney.
6. A combined switching control system for a rotating wheel concentration and adsorption recovery system according to claim 1, characterized in that: There are two coolers. The activated carbon adsorber is connected to the gas phase inlet of one cooler. The gas phase outlet of this activated carbon adsorber is connected to the gas phase inlet of another activated carbon adsorber. The gas phase outlet of this activated carbon adsorber is connected to the inlet of a stratified tank. The liquid phase inlets of both activated carbon adsorbers are connected to the cooling water supply system, and the liquid phase outlets of both activated carbon adsorbers are connected to the cooling water return system.
7. A combined switching control system for a rotating wheel concentration and adsorption recovery system according to claim 1, characterized in that: The activated carbon adsorber includes a box body. An activated carbon adsorption group is installed inside the box body. Both ends of the box body are open. A three-way connector is installed at each of the two open ends of the box body. The three-way connector includes a connecting hopper. One end of the connecting hopper is connected to the box body, and the other end of the connecting hopper is connected to a communicating pipe. The other end of the communicating pipe is communicated with the middle of a connecting pipe. The activated carbon adsorption group includes several frame units. The frame unit includes a rectangular frame. Filter side plates are arranged on the front side and the rear side of the rectangular frame. Filter end plates are arranged on the left side and the right side of the rectangular frame. Adjacent two frame units are connected by connecting rods. A blocking plate is arranged at the end of the frame unit. The blocking plate is fixed in the gas passing channels of adjacent two frame units, and the blocking plates are arranged staggeredly at the ends of the frame units.
8. A combined switching control method for a rotating wheel concentration and adsorption recovery system, characterized in that: According to the data of Monitoring Device 1 on the intake main pipe, when the concentration and air volume are below a certain set value, such as concentration < 300 mg / m³ and air volume > 5000 m³ / h, the system adopts Mode 2, that is, switching valve 1 is opened, switching valve 2 is closed, switching valve 3 is opened, and switching valve 4 is closed. The flue gas first enters the adsorption zone of the concentrator wheel through connecting pipe 1 for adsorption. The adsorbed flue gas enters the exhaust main pipe and is finally discharged through the chimney. Then, the high-temperature gas generated by the incinerator is used for desorption in the desorption zone, so that the flue gas is concentrated into a small air volume and high concentration. Then it enters connecting pipe 2 through connecting pipe 3, and enters the activated carbon adsorber through connecting pipe 2. In the activated carbon adsorber, the activated carbon in the activated carbon adsorption group purifies the concentrated flue gas. The purified flue gas enters the exhaust pipeline through connecting pipe 4 and is finally discharged through the chimney; According to the data of Monitoring Device 2, when the emission concentration exceeds 80% of the emission standard, the system will switch to Mode 1, that is, switching valve 2 is opened, switching valve 1 is closed, switching valve 4 is opened, and switching valve 3 is closed.
9. A combined switching control method for a rotating wheel concentration and adsorption recovery system according to claim 8, characterized in that: The working principle of Mode 1 is as follows: Switching valve 2 is opened, switching valve 1 is closed, switching valve 4 is opened, and switching valve 3 is closed. After passing through the filter through the intake main pipe, the flue gas enters the activated carbon adsorber through connecting pipe 2 and is adsorbed by the activated carbon in the activated carbon adsorber. Then it enters connecting pipe 5 through connecting pipe 6, enters connecting pipe 1 through connecting pipe 5, enters the adsorption zone of the concentrator wheel through connecting pipe 1 for adsorption. The adsorbed flue gas enters the chimney through the exhaust main pipe. After the desorption zone of the concentrator wheel enters the high-temperature gas of the incinerator, desorption occurs. The desorbed flue gas enters connecting pipe 2 through connecting pipe 3, and then enters the activated carbon adsorber through connecting pipe 2 for adsorption, and the cycle is repeated to complete the purification of the flue gas.
10. A combined switching control method for a rotating wheel concentration and adsorption recovery system according to claim 8, characterized in that: The working principle of Mode 2 is as follows: Switching valve 1 is opened, switching valve 2 is closed, switching valve 3 is opened, and switching valve 4 is closed. After passing through the filter through the intake main pipe, the flue gas enters the adsorption zone of the concentrator wheel through connecting pipe 1 for adsorption. The adsorbed flue gas enters the chimney through the exhaust main pipe. After the desorption zone of the concentrator wheel enters the high-temperature gas of the incinerator, desorption occurs. The desorbed flue gas enters connecting pipe 2 through connecting pipe 3, and then enters the activated carbon adsorber through connecting pipe 2 for adsorption. After adsorption, it enters connecting pipe 4 through connecting pipe 6, and enters the exhaust main pipe through connecting pipe 4 and then is discharged through the chimney.