Waste gas integrated treatment system and process

Abstract

The invention relates to the technical field of flue gas recovery, in particular to an integrated waste gas treatment system and process. The gas inlet end of an adsorption area of a zeolite rotating wheel is connected with a gas inlet main pipe, and the gas outlet end of a regeneration area of the zeolite rotating wheel is connected with a gas inlet pipe I of a heat exchanger I; a first exhaust pipe of the first heat exchanger is connected with the air inlet end of a desorption area of the zeolite rotating wheel, the air outlet end of the desorption area is connected with a second connecting pipe, a second control valve is installed on the second connecting pipe, the other end of the second connecting pipe is connected with a first air inlet pipe of the second heat exchanger, and a first exhaust pipe of the second heat exchanger is connected with the air inlet end of the incinerator. The exhaust end of the incinerator is connected with a second air inlet pipe of the first heat exchanger, a second exhaust pipe of the first heat exchanger is connected with a second air inlet pipe of the second heat exchanger, a second exhaust pipe of the second heat exchanger is connected with the chimney, a second connecting pipe is connected with a third connecting pipe, and a third control valve is installed on the third connecting pipe. According to the invention, the incinerator and the activated carbon adsorber are switched for use, so that the system can be overhauled without shutdown.

Description

Technical Field

[0001] The patent of this invention relates to the field of flue gas recovery technology, and specifically to an integrated waste gas treatment system and process. Background Art

[0002] In the pharmaceutical, printing, fine chemical and other industries, there are many low-concentration, high-volume exhaust gas treatment conditions, which require exhaust gas treatment before discharge. However, the existing exhaust gas treatment system needs to be stopped for maintenance after a period of use, which affects the progress and efficiency of exhaust gas treatment. Summary of the invention

[0003] The invention provides an integrated waste gas treatment system.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: An integrated waste gas treatment system comprises a zeolite rotor, wherein the air inlet end of the adsorption zone of the zeolite rotor is connected to the air inlet main pipe, the air outlet end of the adsorption zone is connected to the chimney, the air outlet end of the regeneration zone of the zeolite rotor is connected to the air inlet pipe 1 of the first heat exchanger, the exhaust pipe 1 of the first heat exchanger is connected to the air inlet end of the desorption zone of the zeolite rotor, the air outlet end of the desorption zone is connected to the second connecting pipe, the second connecting pipe is equipped with a control valve 2, the other end of the second connecting pipe is connected to the air inlet pipe 1 of the second heat exchanger, the exhaust pipe 1 of the second heat exchanger is connected to the air inlet end of the incinerator, the exhaust end of the incinerator is connected to the air inlet pipe 2 of the first heat exchanger, the exhaust pipe 2 of the first heat exchanger is connected to the air inlet end of the second heat exchanger, and the exhaust pipe 2 of the first heat exchanger is connected to the air inlet end of the second heat exchanger. The gas pipes are connected with each other, the exhaust pipe 2 of the heat exchanger 2 is connected with the chimney, the connecting pipe 2 is connected with the connecting pipe 3, the connecting pipe 3 is equipped with a control valve 3, the other end of the connecting pipe 3 is connected with the adsorption air inlet pipe at the bottom of the activated carbon adsorber, the adsorption exhaust pipe at the top of the activated carbon adsorber is connected with the chimney, the desorption air inlet pipe at the top of the activated carbon adsorber is connected with the connecting pipe 5, the connecting pipe 5 is equipped with a control valve 5, the connecting pipe 5 is connected with the connecting pipe 6, the connecting pipe 6 is equipped with a control valve 6, the other end of the connecting pipe 6 is connected with the upper part of the incinerator, the connecting pipe 5 is also connected with one end of the connecting pipe 7, and the connecting pipe 7 is equipped with a control valve 7. The other end of the connecting pipe seven is connected to the air inlet pipe two of the heat exchanger two, the desorption exhaust pipe at the bottom of the activated carbon adsorber is connected to the connecting pipe four, the other end of the connecting pipe four is connected to the air inlet end of the incinerator, the adsorption air inlet pipe of the activated carbon adsorber is connected to the connecting pipe one, a control valve one is installed on the connecting pipe one, and the other end of the connecting pipe one is connected to the air inlet main pipe.

[0005] Furthermore, the air intake main pipe is equipped with an air intake main valve, the air intake main pipe is also equipped with a filter box, the connecting pipe 1 is connected to the pipeline between the filter box and the zeolite rotor, and the pipeline between the filter box and the zeolite rotor is also equipped with a control valve 9.

[0006] Furthermore, an exhaust fan is installed on the pipeline between the gas outlet end of the adsorption zone of the zeolite wheel and the chimney.

[0007] Furthermore, the connecting pipe 2 is provided with a second fan, the connecting pipe 4 is provided with a third fan, and the air inlet end of the incinerator is connected to the fourth fan.

[0008] Furthermore, a control valve 8 is installed on the connecting pipeline between the exhaust pipe 2 of the heat exchanger 1 and the intake pipe 2 of the heat exchanger 2.

[0009] Furthermore, the air inlet end of the regeneration zone of the zeolite wheel is connected to a cooling fan.

[0010] Advantages: The present invention realizes non-stop maintenance of the system through the switchable use of the incinerator and the activated carbon adsorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the activated carbon adsorber in the present invention; In the figure: 1 air intake main pipe, 2 air intake main valve, 3 filter box, 4 zeolite rotor, 5 exhaust fan one, 6 chimney, 7 fan two, 8 heat exchanger one, 9 heat exchanger two, 10 incinerator, 11 activated carbon adsorber, 12 connecting pipe one, 13 control valve one, 14 connecting pipe two, 15 control valve two, 16 connecting pipe three, 17 control valve three, 18 connecting pipe four, 19 fan three, 20 connecting pipe five, 21 control valve five, 22 connecting pipe six, 23 control valve six, 24 connecting pipe seven, 25 control valve seven, 26 control valve eight, 27 fan four, 28 control valve nine; 1101 desorption exhaust pipe, 1102 adsorption exhaust pipe, 1103 desorption intake pipe, 1104 adsorption intake pipe, 1105 switching valve one, 1106 switching valve two, 1107 switching valve three, 1108 switching valve four. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0013] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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, and therefore cannot be understood as a limitation on the present invention.

[0014] Reference Figure 1 –2 shows an integrated waste gas treatment system in the present invention, including a zeolite rotor 4, wherein the air inlet end of the adsorption zone of the zeolite rotor 4 is connected to the air inlet manifold 1, and the air outlet end of the adsorption zone is connected to the chimney 6, the air outlet end of the regeneration zone of the zeolite rotor 4 is connected to the air inlet pipe 1 of the heat exchanger 8, the air exhaust pipe 1 of the heat exchanger 8 is connected to the air inlet end of the desorption zone of the zeolite rotor 4, the air inlet pipe 1 and the air exhaust pipe 1 of the heat exchanger 8 are the tube side of the heat exchanger 8, the air inlet pipe 2 and the air exhaust pipe 2 of the heat exchanger 8 are the shell side of the heat exchanger 8, the air inlet pipe 1 and the air exhaust pipe 1 of the heat exchanger 29 are the tube side of the heat exchanger 29, and the air inlet pipe 2 and the air exhaust pipe 2 of the heat exchanger 29 are the shell side of the heat exchanger 29.

[0015] The gas outlet end of the desorption zone is connected to the connecting pipe 2 14, on which the control valve 2 15 is installed, the other end of the connecting pipe 2 14 is connected to the air inlet pipe 1 of the heat exchanger 2 9, the exhaust pipe 1 of the heat exchanger 2 9 is connected to the air inlet end of the incinerator 10, the exhaust end of the incinerator 10 is connected to the air inlet pipe 2 of the heat exchanger 1 8, the exhaust pipe 2 of the heat exchanger 1 8 is connected to the air inlet pipe 2 of the heat exchanger 2 9, the exhaust pipe 2 of the heat exchanger 2 9 is connected to the chimney 6, the connecting pipe 2 14 is connected to the connecting pipe 3 16, the connecting pipe 3 16 is equipped with a control valve 3 17, and the other end of the connecting pipe 3 16 It is connected to the adsorption air inlet pipe 1104 at the bottom of the activated carbon adsorber 11, the adsorption exhaust pipe 1102 at the top of the activated carbon adsorber 11 is connected to the chimney 6, the desorption air inlet pipe 1103 at the top of the activated carbon adsorber 11 is connected to the connecting pipe five 20, the connecting pipe five 20 is equipped with a control valve five 21, the connecting pipe five 20 is connected to the connecting pipe six 22, the connecting pipe six 22 is equipped with a control valve six 23, the other end of the connecting pipe six 22 is connected to the upper part of the incinerator 10, the connecting pipe five 20 is also connected to one end of the connecting pipe seven 24, and the connecting pipe seven 24 is equipped with a control valve seven 25. The other end of the connecting pipe 7 24 is connected to the air inlet pipe 2 of the heat exchanger 2 9, the desorption exhaust pipe 1101 at the bottom of the activated carbon adsorber 11 is connected to the connecting pipe 4 18, the other end of the connecting pipe 4 18 is connected to the air inlet end of the incinerator 10, the adsorption air inlet pipe 1104 of the activated carbon adsorber 11 is connected to the connecting pipe 1 12, the connecting pipe 1 12 is equipped with a control valve 13, and the other end of the connecting pipe 1 12 is connected to the air intake main pipe 1. The air intake main pipe 1 is equipped with an air intake main valve 2, and the air intake main pipe 1 is also equipped with a filter box 3. The connecting pipe 1 12 is connected to the pipeline between the filter box 3 and the zeolite runner 4, and the control valve 9 28 is also installed on the pipeline between the filter box 3 and the zeolite runner 4. An exhaust fan 5 is installed on the pipeline between the air outlet end of the adsorption zone of the zeolite runner 4 and the chimney 6. The connecting pipe 2 14 is provided with a fan 2 7, the connecting pipe 4 18 is provided with a fan 3 19, and the air inlet end of the incinerator 10 is connected to the fan 4 27. A control valve 8 26 is provided on the connecting pipe between the exhaust pipe 2 of the heat exchanger 1 8 and the air inlet pipe 2 of the heat exchanger 2 9. The air inlet end of the regeneration zone of the zeolite wheel 4 is connected to the cooling fan. The cooling fan is used to supply fresh air to the regeneration zone of the zeolite wheel 4. A monitor is provided on the air inlet main pipe 1. The monitor is used to monitor the exhaust gas concentration in the exhaust main pipe.

[0016] The desorption exhaust pipe 1101 of the activated carbon adsorber 11 is provided with a switching valve 1105, the desorption air inlet pipe 1103 is provided with a switching valve 2 1106, the adsorption air inlet pipe 1104 is provided with a switching valve 4 1108, and the adsorption exhaust pipe 1102 is provided with a switching valve 3 1107.

[0017] The present invention provides an embodiment, an integrated exhaust gas treatment process, which switches the mode of the integrated exhaust gas treatment system according to the exhaust gas concentration monitored by the monitor on the intake manifold 1. When the exhaust gas concentration monitored by the monitor is less than 300 mg / m³, the system selects mode one, and when the exhaust gas concentration monitored by the monitor is greater than or equal to 300 mg / m³, the system selects mode two.

[0018] Mode 1: In mode 1, control valve 2 15, control valve 8 26, and control valve 9 28 are opened, and the exhaust gas enters the adsorption zone of the zeolite rotor 4 from the air intake main pipe 1 after being filtered by the filter box 3 for adsorption, and is then discharged through the chimney 6. The cooling air is blown into the regeneration zone of the zeolite rotor 4 through the cooling fan. The cooling air cools the rotor in the cooling zone and then enters the heat exchanger 1 8 for heat exchange with the hot air discharged from the incinerator 10, and then enters the desorption zone of the zeolite rotor 4 to desorb the rotor. The desorbed gas enters the heat exchanger 2 9 for heat exchange with the exhaust gas discharged from the heat exchanger 8, and then the desorbed gas enters the incinerator 10 for oxidative combustion. The exhaust gas discharged from the exhaust pipe 2 of the heat exchanger 2 9 is discharged through the chimney 6. In mode 1, the activated carbon adsorber 11 can be stopped for maintenance.

[0019] Mode 2: In mode 2, control valve 13 is opened, control valve 3 17, control valve 5 21, control valve 6 23, control valve 7 25, control valve 8 26, and control valve 9 28 are closed, and the exhaust gas passes through the filter box 3 from the intake manifold 1 and enters the adsorption intake pipe 1104 of the activated carbon adsorber 11 through the connecting pipe 12, and enters the activated carbon adsorber 11 for adsorption, the switching valve 2 1106 and switching valve 1 1105 of the activated carbon adsorber 11 are closed, and the switching valve 3 1107 and switching valve 4 1108 are opened; after adsorption, the exhaust gas is discharged from the adsorption exhaust end of the activated carbon adsorber 11 and then discharged from the chimney 6. In mode 2, the incinerator 10 can be stopped for maintenance.

[0020] In mode one, the activated carbon adsorber 11 can be desorbed. During desorption, the control valve six 23 and the control valve five 21 are opened, the switching valve two 1106 and the switching valve one 1105 of the activated carbon adsorber 11 are opened, and the switching valve three 1107 and the switching valve four 1108 are closed; the hot exhaust gas in the incinerator 10 enters the connecting pipe five 20 through the connecting pipe six 22, and enters the desorption inlet pipe 1103 of the activated carbon adsorber 11 through the connecting pipe five 20 to enter the activated carbon adsorber 11, and the hot exhaust gas desorbs the activated carbon in the activated carbon adsorber 11, and the desorbed gas enters the incinerator 10 through the connecting pipe four 18 for oxidative combustion.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated waste gas treatment system, characterized in that: The invention comprises a zeolite rotor, wherein the air inlet end of the adsorption zone of the zeolite rotor is connected to the air inlet main pipe, the air outlet end of the adsorption zone is connected to the chimney, the air outlet end of the regeneration zone of the zeolite rotor is connected to the air inlet pipe 1 of the first heat exchanger, the exhaust pipe 1 of the first heat exchanger is connected to the air inlet end of the desorption zone of the zeolite rotor, the air outlet end of the desorption zone is connected to the second connecting pipe, the second connecting pipe is equipped with a control valve 2, the other end of the second connecting pipe is connected to the air inlet pipe 1 of the second heat exchanger, the exhaust pipe 1 of the second heat exchanger is connected to the air inlet end of the incinerator, the exhaust end of the incinerator is connected to the air inlet pipe 2 of the first heat exchanger, the exhaust pipe 2 of the first heat exchanger is connected to the air inlet pipe 2 of the second heat exchanger, the exhaust pipe 2 of the second heat exchanger is connected to the chimney, the second connecting pipe is connected to the third connecting pipe, the third connecting pipe is equipped with a control valve 3, the other end of the third connecting pipe is connected to the activated carbon adsorption The adsorption inlet pipe at the bottom of the attachment is connected, the adsorption exhaust pipe at the top of the activated carbon adsorber is connected to the chimney, the desorption inlet pipe at the top of the activated carbon adsorber is connected to the connecting pipe five, the connecting pipe five is equipped with a control valve five, the connecting pipe five is connected to the connecting pipe six, the connecting pipe six is ​​equipped with a control valve six, the other end of the connecting pipe six is ​​connected to the upper part of the incinerator, the connecting pipe five is also connected to one end of the connecting pipe seven, the connecting pipe seven is equipped with a control valve seven, the other end of the connecting pipe seven is connected to the inlet pipe two of the heat exchanger two, the desorption exhaust pipe at the bottom of the activated carbon adsorber is connected to the connecting pipe four, the other end of the connecting pipe four is connected to the air inlet end of the incinerator, the adsorption inlet pipe of the activated carbon adsorber is connected to the connecting pipe one, the connecting pipe one is equipped with a control valve one, and the other end of the connecting pipe one is connected to the air intake main pipe.

2. The integrated exhaust gas treatment system according to claim 1, characterized in that: The air intake main pipe is equipped with an air intake main valve, and the air intake main pipe is also equipped with a filter box. The connecting pipe 1 is connected to the pipeline between the filter box and the zeolite runner, and the pipeline between the filter box and the zeolite runner is also equipped with a control valve 9.

3. The integrated exhaust gas treatment system according to claim 1, characterized in that: An exhaust fan is installed on the pipeline between the gas outlet end of the adsorption zone of the zeolite wheel and the chimney.

4. The integrated exhaust gas treatment system according to claim 1, characterized in that: The connecting pipe 2 is provided with a second fan, the connecting pipe 4 is provided with a third fan, and the air inlet end of the incinerator is connected to the fourth fan.

5. The integrated exhaust gas treatment system according to claim 1, characterized in that: A control valve 8 is installed on the connecting pipeline between the exhaust pipe 2 of the heat exchanger 1 and the intake pipe 2 of the heat exchanger 2.

6. The integrated exhaust gas treatment system according to claim 1, characterized in that: The air inlet end of the regeneration zone of the zeolite wheel is connected to the cooling fan.

7. An integrated waste gas treatment process, characterized in that: According to the exhaust gas concentration monitored by the monitor on the intake manifold, the mode of the exhaust gas integrated treatment system is switched. When the exhaust gas concentration monitored by the monitor is less than 300mg / m³, the system selects mode 1. When the exhaust gas concentration monitored by the monitor is ≥300mg / m³, the system selects mode 2.

8. The integrated waste gas treatment process according to claim 7 is characterized in that: Mode 1: In mode 1, control valve 2, control valve 8, and control valve 9 are opened, and the exhaust gas enters the adsorption area of ​​the zeolite wheel for adsorption after being filtered by the filter box from the intake manifold, and is then discharged through the chimney. The cooling air is blown into the regeneration area of ​​the zeolite wheel through the cooling fan. The cooling air cools the wheel in the cooling area and then enters the heat exchanger 1 to exchange heat with the hot air discharged from the incinerator, and then enters the desorption area of ​​the zeolite wheel to desorb the wheel. The desorbed gas enters the heat exchanger 2 to exchange heat with the exhaust gas discharged from the heat exchanger 1, and then enters the incinerator for oxidation combustion. The exhaust gas discharged from the exhaust pipe 2 of the heat exchanger 2 is discharged through the chimney; Mode 2: In mode 2, control valve 1 is opened, control valve 3, control valve 5, control valve 6, control valve 7, control valve 8 and control valve 9 are closed, and the exhaust gas is filtered through the filter box from the intake manifold, enters the adsorption intake pipe of the activated carbon adsorber through connecting pipe 1, and enters the activated carbon adsorber for adsorption. Switching valve 2 and switching valve 1 of the activated carbon adsorber are closed, and switching valve 3 and switching valve 4 are opened; after adsorption, the exhaust gas is discharged from the chimney through the adsorption exhaust end of the activated carbon adsorber.

9. The integrated waste gas treatment process according to claim 8, characterized in that: In mode one, the activated carbon adsorber can be desorbed. During desorption, control valve six and control valve five are opened, switching valve two and switching valve one of the activated carbon adsorber are opened, and switching valve three and switching valve four are closed; the hot exhaust gas in the incinerator enters connecting pipe five through connecting pipe six, and enters the desorption inlet pipe of the activated carbon adsorber through connecting pipe five to enter the activated carbon adsorber. The hot exhaust gas desorbs the activated carbon in the activated carbon adsorber, and the desorbed gas enters the incinerator through connecting pipe four for oxidative combustion.

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