Rotating wheel concentration and incinerator combined waste gas treatment system and method

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a rotating wheel concentration and incinerator combined waste gas treatment system and method.The gas inlet end of an adsorption area of a zeolite rotating wheel is connected with a first gas inlet branch pipe, the gas outlet end of the adsorption area of the zeolite rotating wheel is connected with an exhaust manifold, and the end of a second gas inlet branch pipe is connected with the gas inlet end of an incinerator; the air inlet end of the desorption area of the zeolite rotating wheel is connected with the second air outlet pipe of the heat exchanger, the air outlet end of the desorption area of the zeolite rotating wheel is connected with the air inlet end of the incinerator, the air outlet end of the regeneration area of the zeolite rotating wheel is connected with the second air inlet pipe of the heat exchanger, and the end of the first connecting pipe is communicated with the top end of the incinerator. The air outlet end of the incinerator is connected with the exhaust manifold, the first air inlet branch pipe is provided with a first control valve, the second air inlet branch pipe is provided with a second control valve, the first connecting pipe is provided with a third control valve, and the air inlet manifold is provided with a monitor.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a waste gas treatment system and method combining a rotary concentrator and an incinerator. Background Art

[0002] There are many low-concentration, high-volume exhaust gas treatment conditions in the pharmaceutical, printing, and fine chemical industries. Some VOCs exhaust gas has a relatively simple composition, with one or several pollutants of similar nature, which have the value of being recyclable and reused. However, due to the large fluctuations in the air volume and concentration of the working conditions, the use of a single set of equipment cannot meet such conditions at the same time, or wastes a lot of energy, resulting in the company being unable to bear the operating costs of the recycling system. Summary of the invention

[0003] The invention proposes a waste gas treatment system combining a rotary concentration and an incinerator.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A rotary concentration and incinerator combined waste gas treatment system, comprising a zeolite rotary wheel, wherein the air inlet end of the adsorption zone of the zeolite rotary wheel is connected to an air inlet branch pipe 1, the air outlet end of the adsorption zone of the zeolite rotary wheel is connected to an exhaust main pipe, the end of the air inlet branch pipe 1 is connected to the air inlet main pipe, the end of the air inlet main pipe is also connected to an air inlet branch pipe 2, the end of the air inlet branch pipe 2 is connected to the air inlet end of the incinerator, the air inlet end of the desorption zone of the zeolite rotary wheel is connected to an air outlet pipe 2 of a heat exchanger, the air outlet end of the desorption zone of the zeolite rotary wheel is connected to the air inlet end of the incinerator, and the air outlet end of the desorption zone of the zeolite rotary wheel is connected to the air outlet end of the incinerator. The air outlet end of the regeneration zone of the zeolite rotor is connected to the air inlet pipe 2 of the heat exchanger, the air inlet end of the regeneration zone of the zeolite rotor is connected to the cooling fan, the air inlet pipe 1 of the heat exchanger is connected to the connecting pipe 1, the end of the connecting pipe 1 is connected to the top of the incinerator, the air outlet end of the incinerator is connected to the exhaust main pipe, the exhaust main pipe is connected to the chimney, the air inlet branch pipe 1 is equipped with a control valve 1, the air inlet branch pipe 2 is equipped with a control valve 2, the connecting pipe 1 is equipped with a control valve 3, and the air inlet main pipe is equipped with a monitor.

[0005] Furthermore, a three-way connector is provided at the end of the intake main pipe, one interface of the three-way connector is connected to the end of the intake main pipe, another interface of the three-way connector is connected to the end of intake branch pipe one, and the last interface of the three-way connector is connected to the end of intake air duct two.

[0006] Furthermore, a filter box is also installed on the air intake manifold.

[0007] Furthermore, the air inlet pipe 1 and the air outlet pipe 1 of the heat exchanger are the shell side of the heat exchanger, and the air inlet pipe 2 and the air outlet pipe 2 of the heat exchanger are the tube side of the heat exchanger.

[0008] Furthermore, the incinerator includes an upper shell and a lower shell, three heat storage sections 1 are arranged at the lower end of the upper shell, and three heat storage sections 2 are arranged at the upper end of the lower shell, the heat storage sections 1 correspond to the heat storage sections 2 one by one, and the lower end surface of the heat storage section 1 is fixedly connected to the upper end surface of the heat storage section 2, heat storage ceramics are laid in the heat storage section 1, and a saddle ring anti-blocking layer is arranged in the heat storage section 2.

[0009] Furthermore, a maintenance window three is provided on the heat storage section two.

[0010] Furthermore, a first inspection window is provided on the upper shell, and a second inspection window is provided on the lower shell.

[0011] Furthermore, a pad is provided between the heat storage section 1 and the heat storage section 2.

[0012] Furthermore, a lifting valve assembly and a purge air duct are provided at the bottom of the lower shell.

[0013] Beneficial effect: The present invention realizes the switching use of the zeolite rotor and the incinerator by switching between mode one and mode two. The low-concentration exhaust gas is concentrated into high-concentration exhaust gas by the zeolite rotor, which meets different working conditions and saves the natural gas usage of the incinerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a front view of the incinerator in the present invention; Figure 3 It is the right side view of the incinerator in the present invention.

[0015] In the figure: 1 zeolite wheel, 2 incinerator, 3 chimney, 4 air intake main pipe, 5 monitor, 6 filter box, 7 air intake branch pipe 1, 8 air intake branch pipe 2, 9 cooling fan, 10 exhaust main pipe, 11 connecting pipe 1, 12 heat exchanger, 13 control valve 4, 14 control valve 1, 15 control valve 2, 16 control valve 3; 201 upper shell, 202 lower shell, 203 inspection window one, 204 inspection window two, 205 purge air duct, 206 pad, 207 lift valve assembly, 208 inspection window three, 209 heat storage section one, 210 heat storage section two. DETAILED DESCRIPTION

[0016] 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.

[0017] 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.

[0018] Reference Figure 1 A rotary concentration and incinerator combined waste gas treatment system, comprising a zeolite rotary wheel 1, the air inlet end of the adsorption zone of the zeolite rotary wheel 1 is connected to an air inlet branch pipe 1 7, the air outlet end of the adsorption zone of the zeolite rotary wheel 1 is connected to an exhaust main pipe 10, the end of the air inlet branch pipe 1 7 is connected to an air inlet main pipe 4, the end of the air inlet main pipe 4 is also connected to an air inlet branch pipe 2 8, the end of the air inlet branch pipe 2 8 is connected to the air inlet end of an incinerator 2, the air inlet end of the desorption zone of the zeolite rotary wheel 1 is connected to an air outlet pipe 2 of a heat exchanger 12, the air outlet end of the desorption zone of the zeolite rotary wheel 1 is connected to the air inlet end of the incinerator 2, The air outlet end of the regeneration zone of the zeolite rotor 1 is connected to the air inlet pipe 2 of the heat exchanger 12, the air inlet end of the regeneration zone of the zeolite rotor 1 is connected to the cooling fan 9, the air inlet pipe 1 of the heat exchanger 12 is connected to the connecting pipe 11, the end of the connecting pipe 11 is connected to the top of the incinerator 2, the air outlet end of the incinerator 2 is connected to the exhaust main pipe 10, the exhaust main pipe 10 is connected to the chimney 3, the air inlet branch pipe 17 is equipped with a control valve 14, the air inlet branch pipe 28 is equipped with a control valve 2, the connecting pipe 11 is equipped with a control valve 3 16, and the air inlet main pipe 4 is equipped with a monitor 5. The end of the intake manifold 4 is provided with a three-way connector, one interface of the three-way connector is connected to the end of the intake manifold 4, the other interface of the three-way connector is connected to the end of the intake branch pipe 1 7, and the last interface of the three-way connector is connected to the end of the intake air duct 2 8. The intake manifold 4 is also equipped with a filter box 6. The intake pipe 1 and the outlet pipe 1 of the heat exchanger 12 are the shell side of the heat exchanger 12, and the intake pipe 2 and the outlet pipe 2 of the heat exchanger 12 are the tube side of the heat exchanger 12. When the control valve 3 is opened, the hot gas in the incinerator 2 enters the shell side of the heat exchanger 12 through the connecting pipe 1 11. In the shell side of the heat exchanger 12, the hot gas in the connecting pipe 1 11 heats the gas that needs to enter the desorption zone of the zeolite wheel 1 in the tube side of the heat exchanger 12, and the gas after heat exchange with the hot gas in the shell side enters the desorption zone of the zeolite wheel 1 to desorb the zeolite wheel 1. The gas outlet end of the desorption zone of the zeolite wheel 1 is connected to the connecting pipe 2, and the connecting pipe 2 is connected to the gas inlet end of the incinerator 2. The connecting pipe 2 is equipped with a control valve 4 13.

[0019] Reference Figure 2-3The incinerator 2 includes an upper shell 201 and a lower shell 202. The lower end of the upper shell 201 is provided with three heat storage sections 1 209. The interior of the heat storage section 1 209 is connected to the interior of the upper shell 201. The upper end of the lower shell 202 is provided with three heat storage sections 210. The interior of the heat storage section 210 is connected to the interior of the lower shell 202. The heat storage sections 1 209 and the heat storage sections 210 correspond to each other one by one, that is, the leftmost heat storage section 1 209 corresponds to the leftmost heat storage section 210. The heat section 210 is fixed together, the middle heat storage section 1 209 is fixed together with the middle heat storage section 210, the rightmost heat storage section 1 209 is fixed together with the rightmost heat storage section 210, and the lower end surface of the heat storage section 1 209 is fixedly connected to the upper end surface of the heat storage section 2 210, the heat storage section 1 209 is connected to the inside of the heat storage section 2 210, the heat storage section 1 209 is paved with heat storage ceramics, and the heat storage section 2 210 is provided with a saddle ring anti-blocking layer. The heat storage section 2 210 is provided with an inspection window 3 208. The inspection window is used to repair the saddle ring anti-blocking layer in the heat storage section 2 210, the upper shell 201 is provided with an inspection window 1 203, and the inspection window 1 203 is used to repair the inside of the upper shell 201, and the lower shell 202 is provided with an inspection window 2 204. The inspection window 204 is used to repair the interior of the lower shell 202. A pad 206 is provided between the heat storage section 1 209 and the heat storage section 2 210. A lifting valve assembly 207 and a purge air duct 205 are provided at the bottom of the lower shell 202.

[0020] According to the characteristics of zeolite wheel concentration and incinerator thermal oxidation decomposition, the two systems are used in series. According to the system inlet air volume and VOCs analyzer concentration, the system has two modes that can be automatically switched.

[0021] Mode 1 (high concentration): control valve 1 14, control valve 3 16, control valve 4 13 are closed, control valve 2 15 is opened, the flue gas passes through the air intake main pipe 4 and the filter box, then enters the incinerator 2 through the air intake pipe 2, and after combustion and oxidation in the incinerator 2, enters the chimney 3 through the exhaust main pipe 10 and is discharged.

[0022] Mode 2 (low concentration): control valve 1 14, control valve 3 16, control valve 4 13 are opened, and control valve 2 15 is closed. The flue gas passes through the air intake main pipe 4 and the filter box, and then enters the adsorption area of ​​the concentration wheel through the air intake pipe 1 for adsorption. The adsorbed flue gas enters the chimney 3 through the exhaust pipe for discharge. The regeneration area of ​​the concentration wheel is cooled and regenerated by the normal temperature air blown by the cooling fan 9. The air that has contacted with the regeneration area of ​​the zeolite wheel 1 enters the heat exchanger 12 through the air intake pipe 2. After heat exchange with the high-temperature gas discharged from the top of the incinerator 2 in the heat exchanger 12, the heated high-temperature gas enters the desorption area of ​​the zeolite wheel 1 to desorb the zeolite wheel 1. The high-concentration flue gas after desorption enters the incinerator 2 through the connecting pipe 2, and after combustion and oxidation in the incinerator 2, enters the chimney 3 through the exhaust main pipe 10 for discharge.

[0023] A method for treating waste gas combined with a rotary concentrator and an incinerator, according to the data of a VOCs monitor 5 on an air intake main pipe 4, when the concentration and air volume are below a certain set value: concentration <300mg / m³, air volume >5000m³ / h, the system adopts mode 2, that is, control valve 1 14, control valve 3 16, control valve 4 13 are opened, and control valve 2 15 is closed, and the flue gas first passes through the air intake main pipe 4 and passes through the filter box, and then enters the adsorption area of ​​the concentrator through the air intake pipeline 1 for adsorption, and the adsorbed flue gas enters the chimney 3 through the exhaust pipeline for discharge, and the regeneration area of ​​the concentrator is cooled by the normal temperature air blown by the cooling fan 9 and then The air that has contacted the regeneration zone of the zeolite wheel 1 enters the heat exchanger 12 through the air inlet pipe 2, and after heat exchange with the high-temperature gas discharged from the top of the incinerator 2 in the heat exchanger 12, the heated high-temperature gas enters the desorption zone of the zeolite wheel 1 to desorb the zeolite wheel 1. The high-concentration flue gas after desorption enters the incinerator 2 through the connecting pipe 2, and after combustion and oxidation in the incinerator 2, it enters the chimney 3 through the exhaust main pipe 10 for discharge. After concentration by the wheel, the inlet air volume of the incinerator 2 is less than 500m³ / h, and the concentration is greater than 3000mg / m³, which can effectively reduce the use of natural gas in the incinerator 2 and has economic benefits.

[0024] 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. A combined exhaust gas treatment system of a rotary concentrator and an incinerator, 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 first air inlet branch pipe, the air outlet end of the adsorption zone of the zeolite rotor is connected to the exhaust main pipe, the end of the first air inlet branch pipe is connected to the air inlet main pipe, the end of the air inlet main pipe is also connected to the second air inlet branch pipe, the end of the second air inlet branch pipe is connected to the air inlet end of the incinerator, the air inlet end of the desorption zone of the zeolite rotor is connected to the second air outlet pipe of the heat exchanger, the air outlet end of the desorption zone of the zeolite rotor is connected to the air inlet end of the incinerator, and the zeolite The air outlet end of the regeneration zone of the rotor is connected to the air inlet pipe 2 of the heat exchanger, the air inlet end of the regeneration zone of the zeolite rotor is connected to the cooling fan, the air inlet pipe 1 of the heat exchanger is connected to the connecting pipe 1, the end of the connecting pipe 1 is connected to the top of the incinerator, the air outlet end of the incinerator is connected to the exhaust main pipe, the exhaust main pipe is connected to the chimney, the air inlet branch pipe 1 is equipped with a control valve 1, the air inlet branch pipe 2 is equipped with a control valve 2, the connecting pipe 1 is equipped with a control valve 3, and the air inlet main pipe is equipped with a monitor.

2. A rotary wheel concentration and incinerator combined exhaust gas treatment system according to claim 1, characterized in that: A three-way connector is provided at the end of the intake main pipe, one interface of the three-way connector is connected to the end of the intake main pipe, another interface of the three-way connector is connected to the end of the intake branch pipe one, and the last interface of the three-way connector is connected to the end of the intake air duct two.

3. A rotary wheel concentration and incinerator combined exhaust gas treatment system according to claim 2, characterized in that: A filter box is also mounted on the air intake manifold.

4. The exhaust gas treatment system of the rotary concentrator and incinerator combined with the exhaust gas treatment system of claim 1 is characterized by: The air inlet pipe 1 and the air outlet pipe 1 of the heat exchanger are the shell side of the heat exchanger, and the air inlet pipe 2 and the air outlet pipe 2 of the heat exchanger are the tube side of the heat exchanger.

5. The exhaust gas treatment system of the rotary wheel concentration and incinerator combined with the exhaust gas treatment system of claim 1 is characterized by: The gas outlet end of the desorption zone of the zeolite wheel is connected to the second connecting pipe, the second connecting pipe is connected to the gas inlet end of the incinerator, and the second connecting pipe is equipped with a control valve four.

6. The exhaust gas treatment system of the rotary wheel concentration and incinerator combined with the exhaust gas treatment system of claim 1 is characterized by: The incinerator comprises an upper shell and a lower shell. Three heat storage segments 1 are arranged at the lower end of the upper shell, and three heat storage segments 2 are arranged at the upper end of the lower shell. The heat storage segments 1 correspond to the heat storage segments 2 one by one, and the lower end surface of the heat storage segment 1 is fixedly connected to the upper end surface of the heat storage segment 2. Heat storage ceramics are laid in the heat storage segment 1, and a saddle ring anti-blocking layer is arranged in the heat storage segment 2.

7. A method for treating waste gas by combining a rotary concentrator and an incinerator, characterized in that: According to the data of the VOCs monitor on the air intake main pipe, when the concentration and air volume are below a certain set value: concentration <300mg / m³, air volume >5000m³ / h, the system adopts mode 2. According to the data of the VOCs monitor on the air intake main pipe, when the concentration and air volume are below a certain set value: concentration ≥300mg / m³, the system adopts mode 1.

8. The method for treating waste gas by combining a rotary concentrator and an incinerator according to claim 7, characterized in that: Mode 1: Control valve 1, control valve 3, and control valve 4 are closed, and control valve 2 is opened. The flue gas passes through the air intake main pipe and the filter box, and then enters the incinerator through the air intake pipe 2. After combustion and oxidation in the incinerator, it enters the chimney through the exhaust main pipe and is discharged; Mode 2: Control valve 1, control valve 3, and control valve 4 are opened, and control valve 2 is closed. The flue gas passes through the air intake main pipe and the filter box, and then enters the adsorption area of ​​the concentration wheel through the air intake pipe 1 for adsorption. The adsorbed flue gas enters the chimney through the exhaust pipe and is discharged. The regeneration area of ​​the concentration wheel is cooled and regenerated by the normal temperature air blown by the cooling fan. The air that has contacted the regeneration area of ​​the zeolite wheel enters the heat exchanger through the air intake pipe 2. After heat exchange with the high-temperature gas discharged from the top of the incinerator in the heat exchanger, the heated high-temperature gas enters the desorption area of ​​the zeolite wheel to desorb the zeolite wheel. The high-concentration flue gas after desorption enters the incinerator through the connecting pipe 2, and after combustion and oxidation in the incinerator, it enters the chimney through the exhaust main pipe and is discharged.

Images