Waste gas treatment system capable of improving removal efficiency

Abstract

The utility model discloses a waste gas treatment system capable of improving removal efficiency, which comprises a dry filter arranged at an inlet pipe of the system; an adsorption inlet of the zeolite rotating wheel is connected with an outlet of the dry filter; the adsorption fan is arranged between the adsorption outlet of the zeolite rotating wheel and the chimney and is used for conveying the waste gas which is purified to reach the standard to the chimney to be discharged; a hot side inlet of the high-temperature heat exchanger is connected with the heat accumulating type incinerator, and a hot side outlet of the high-temperature heat exchanger is connected with the chimney; a cold-side inlet of the high-temperature heat exchanger is connected with an air outlet of a desorption completion area of the zeolite runner, and a cold-side outlet of the high-temperature heat exchanger is connected with an air inlet of the desorption area of the zeolite runner; and the desorption fan is arranged between the air outlet of the desorption area of the zeolite rotating wheel and the heat accumulating type incinerator and is used for conveying the waste gas of the desorption area to the heat accumulating type incinerator.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and specifically to a waste gas treatment system that improves removal efficiency. Background Technology

[0002] Waste gas refers to toxic and harmful gases emitted by humans during production and daily life, which seriously pollute the environment and affect human health. Because there are many types of waste gas, the methods for treating them also vary, with condensation, absorption, combustion, catalysis, and adsorption being some of the more commonly used methods.

[0003] Currently, activated carbon adsorption systems are mainly used to treat pollutants in waste gas. However, these systems only separate the pollutants from the waste gas without converting them. Furthermore, saturated activated carbon is considered hazardous waste and needs to be replaced regularly, which is costly.

[0004] Therefore, how to transform existing waste gas treatment systems to convert organic pollutants into non-polluting substances for emission while recycling adsorption materials, thereby reducing waste gas treatment costs, has become an urgent problem to be solved. Utility Model Content

[0005] In view of this, the present invention provides a waste gas treatment system that improves removal efficiency, in order to solve the problems of low recycling rate of adsorption materials and high waste gas treatment cost in the prior art.

[0006] This utility model embodiment provides a waste gas treatment system with improved removal efficiency, including:

[0007] A dry filter is installed at the system inlet pipe;

[0008] The zeolite rotor has its adsorption inlet connected to the outlet of the dry filter.

[0009] An adsorption fan is installed between the adsorption outlet of the zeolite rotor and the chimney to transport the purified exhaust gas to the chimney for discharge.

[0010] The high-temperature heat exchanger has its hot-side inlet connected to a regenerative incinerator and its hot-side outlet connected to a chimney; its cold-side inlet is connected to the air outlet of the desorption completion zone of the zeolite rotor and its cold-side outlet is connected to the air inlet of the desorption zone of the zeolite rotor.

[0011] The desorption fan is located between the air outlet of the desorption zone of the zeolite rotor and the regenerative thermal oxidizer, and transports the exhaust gas from the desorption zone to the regenerative thermal oxidizer.

[0012] In this process, the cold exhaust gas from the desorption completion zone of the zeolite rotor enters the high-temperature heat exchanger through the cold side inlet. After heat exchange, the heated exhaust gas enters the desorption zone of the zeolite rotor through the cold side outlet to desorb the zeolite in the desorption zone. The resulting higher concentration exhaust gas is then transported to the regenerative thermal oxidizer via the desorption fan for high-temperature degradation.

[0013] Optionally, it also includes:

[0014] A differential pressure sensor is installed at the system inlet pipe to control the variable frequency operation of the adsorption fan;

[0015] Both fire dampers and electric valves are installed at the system inlet pipe.

[0016] Optionally, dry filters include: four-stage plate filters and bag filters.

[0017] Optionally, it also includes a fire sprinkler system installed inside the zeolite rotor.

[0018] Optionally, both the air inlet and outlet of the adsorption fan are made of flexible connection.

[0019] Optionally, it also includes:

[0020] A combustible gas concentration detector is installed in the first pipe connected to the air outlet of the desorption zone to detect the concentration of desorbed exhaust gas.

[0021] The fresh air valve is installed at the inlet of the desorption fan. When the concentration of exhaust gas in the first duct is higher than the preset value, the fresh air valve opens, and the desorption fan supplies fresh air to the first duct to reduce the concentration of exhaust gas.

[0022] Optionally, it also includes:

[0023] The flame arrester is installed at the outlet of the desorption fan.

[0024] Optionally, it also includes:

[0025] The first pneumatic switch valve is located at the inlet of the regenerative incinerator;

[0026] The second pneumatic switch valve is located at the outlet of the regenerative incinerator;

[0027] The flow direction of the desorbed gas is switched by controlling the opening and closing states of the first and second pneumatic switching valves.

[0028] Optionally, it also includes:

[0029] The back-blowing fan uses air to blow the organic waste gas in the ceramic regenerator into the upper part of the regenerative incinerator for oxidation and degradation.

[0030] Optionally, it also includes:

[0031] Explosion relief discs are installed at the outlet of the desorption fan and on the upper part of the regenerative incinerator.

[0032] The beneficial effects of this utility model are:

[0033] 1. This utility model is applicable to the treatment of volatile organic waste gas. It utilizes a zeolite rotor and a regenerative thermal oxidizer to separate and transform pollutants in the waste gas, converting volatile organic pollutants into harmless carbon dioxide and water vapor for emission in compliance with standards.

[0034] 2. This utility model's waste gas treatment system has low energy consumption and low operating costs. The regenerative thermal oxidizer can efficiently store heat in the regenerator, saving natural gas consumption and thus reducing operating costs.

[0035] 3. This utility model adopts a four-stage dry filter, which can filter out most particulate matter and has the advantages of high filtration accuracy, no secondary pollution and reusability.

[0036] 4. This utility model utilizes a high-temperature heat exchanger to improve energy utilization efficiency and reduce energy consumption. Attached Figure Description

[0037] The features and advantages of this utility model will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as limiting the utility model in any way. In the drawings:

[0038] Figure 1 A structural block diagram of a waste gas treatment system for improving removal efficiency is shown in an embodiment of the present invention.

[0039] Figure 2 A top view of a waste gas treatment system with improved removal efficiency is shown in an embodiment of the present invention.

[0040] Figure 3 This illustration shows one side view of a waste gas treatment system for improving removal efficiency according to an embodiment of the present invention.

[0041] Figure 4 This is a second side view of a waste gas treatment system with improved removal efficiency according to an embodiment of the present invention;

[0042] Figure Label Explanation: 1-Exhaust gas inlet pipe; 101-Differential pressure sensor; 2-Dry filter; 201-Fire damper; 202-Electric valve; 203-Differential pressure gauge; 204-Dry filter access door; 3-Rotor inlet pipe; 4-Zeolite rotor; 401-Rotor inlet square to round; 402-Rotor outlet square to round; 5-Adsorption fan inlet pipe; 6-Adsorption fan; 601-Adsorption fan inlet flexible connection; 602-Adsorption fan outlet flexible connection; 7-Adsorption fan outlet pipe; 8-Chimney grid frame; 9-Chimney; 10-Z-shaped inspection ladder; 11-Regenerative thermal oxidizer; 1101-Maintenance ladder; 1102-Equipment detonator; 1103-Regenerative thermal oxidizer base; 1104-High temperature valve; 1105-Canopy; 1106-Regenerative thermal oxidizer furnace access door; 11 07-Maintenance platform; 1108-Pneumatic switch valve; 12-Backflow blower; 13-Combustion fan; 14-Desorption fan; 15-High-temperature heat exchanger; 1501-High-temperature heat exchanger outlet pipe; 1502-High-temperature heat exchanger maintenance platform; 1503-Heat exchanger hot side inlet; 1504-Heat exchanger hot side outlet; 1505-Heat exchanger cold side inlet; 1506-Heat exchanger cold side outlet; 1 6-Desorption blower outlet pipe; 1601-Explosion relief disc; 1602-Flame arrester; 17-Combustion system; 1701-Combustion air duct; 1702-Gas pipe; 18-Desorption completion zone outlet pipe; 19-Desorption zone inlet pipe; 20-Desorption zone outlet pipe; 2001-Combustible gas concentration detector; 2002-Fresh air valve; 21-Backdraft blower inlet pipe; 22-Regenerative thermal oxidizer outlet pipe. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] This utility model provides a waste gas treatment system with improved removal efficiency, including a dry filter, a zeolite rotor, a regenerative thermal oxidizer, power equipment, and connecting pipelines. It is applicable to the treatment of volatile organic compounds (VOCs), such as... Figure 1 As shown, the working principle of this utility model embodiment is as follows:

[0045] First, most particulate matter is separated by a dry filter. Volatile organic pollutants are adsorbed by a zeolite rotor. The purified exhaust gas is transported to the chimney by an adsorption fan and discharged in compliance with standards. The concentrated organic pollutants are then desorbed by high-temperature gas. The desorbed exhaust gas is degraded at high temperature in a regenerative thermal oxidizer. Finally, the treated desorbed exhaust gas is discharged through the chimney in compliance with standards.

[0046] The exhaust gas first enters the dry filter, where plate filter and bag filter are used to filter out particulate matter.

[0047] Volatile organic waste gas passes through the adsorption zone of the zeolite rotary device, where the volatile organic pollutants in the waste gas are adsorbed by the zeolite.

[0048] The purified exhaust gas is transported to the chimney by the power equipment adsorption fan and discharged in compliance with standards.

[0049] The exhaust gas in the desorption completion zone enters through the inlet of the cold side zone of the high-temperature heat exchanger, while the high-temperature gas in the regenerative incinerator enters through the hot side zone of the high-temperature heat exchanger. Due to the large temperature difference between the gas in the regenerative incinerator and the exhaust gas in the desorption completion zone, the temperature of the exhaust gas in the desorption completion zone increases, thus achieving heat exchange.

[0050] The exhaust gas from the heat exchanged desorption zone enters the zeolite rotor desorption zone, where organic pollutants adsorbed on the zeolite rotor are desorbed.

[0051] The exhaust gas from the desorption zone is transported by the desorption blower to the regenerative thermal oxidizer through the desorption zone outlet duct. The pollutants are oxidized and degraded into carbon dioxide and water vapor at high temperature inside the furnace.

[0052] After being degraded at high temperature, the exhaust gas from the desorption zone is transported from the outlet pipe of the regenerative thermal oxidizer to the chimney for emission in compliance with standards.

[0053] After the zeolite rotor desorption is completed, the temperature is high and needs to be cooled down. The room temperature gas after the zeolite rotor adsorption and treatment is used to cool down the zeolite rotor, thereby reducing the temperature of the desorption zone and restoring the adsorption function of the desorption zone.

[0054] In a specific embodiment, such as Figures 2-4 As shown, a differential pressure sensor is installed on the system inlet pipe to control the variable frequency operation of the fan.

[0055] A fire damper is installed at the system inlet. In the event of a fire, the fire damper will automatically close to isolate the fire. An electric valve is also installed at the system inlet to automatically control the opening and closing of the system.

[0056] The dry filter employs a four-stage plate and bag filter system. This multi-stage filtration effectively removes particulate matter and prevents clogging of the zeolite rotor. The dry filter is equipped with an inspection door for easy maintenance and repair. A mechanical differential pressure gauge is also included to monitor the pressure difference within the filtration system.

[0057] Volatile organic waste gas enters the zeolite rotor adsorption zone, where the volatile organic compounds in the waste gas are adsorbed by the zeolite on the rotor.

[0058] The zeolite rotor is equipped with a fire sprinkler system. When the internal temperature of the zeolite rotor is too high, the solenoid valve will automatically open, and fire sprinkler water will be used to cool it down.

[0059] The inlet and outlet of the zeolite rotor are equipped with square-to-round transitions to facilitate pipe connection.

[0060] The inlet and outlet of the adsorption fan are equipped with flexible connections, which can reduce the transmission of fan vibration, reduce noise generation, and extend the service life of the fan; the purified exhaust gas is transported to the chimney by the power equipment adsorption fan and discharged in compliance with standards.

[0061] The chimney is equipped with a grid frame to support its own weight and ensure safety. A Z-shaped inspection ladder facilitates sampling at the sampling port, which is beneficial for chimney inspection and maintenance, and improves operational safety.

[0062] The exhaust gas in the desorption completion zone enters through the inlet of the cold side zone of the high-temperature heat exchanger, while the high-temperature gas in the regenerative incinerator enters through the hot side zone of the high-temperature heat exchanger. Due to the large temperature difference between the gas in the regenerative incinerator and the exhaust gas in the desorption completion zone, the temperature of the exhaust gas in the desorption completion zone increases, thus achieving heat exchange.

[0063] The exhaust gas from the heat-exchange desorption zone enters the zeolite rotor desorption zone, where organic pollutants adsorbed on the zeolite rotor are desorbed. A combustible gas concentration detector is installed on the exhaust duct of the desorption zone to monitor the concentration of the desorbed exhaust gas.

[0064] The desorption fan inlet is equipped with a fresh air valve. When the exhaust gas concentration in the outlet duct of the desorption zone is high, the fresh air valve opens to supply fresh air, reducing the exhaust gas concentration and ensuring the purification efficiency of the regenerative thermal oxidizer. The desorption fan outlet is equipped with a pressure relief diaphragm. When the internal pressure of the duct is too high, the pressure relief diaphragm bursts, releasing the pressure. The desorption fan outlet is also equipped with a flame arrester. When the temperature inside the outlet duct of the desorption fan is high, the flame arrester automatically closes, preventing high-temperature gas from entering the front end and damaging the desorption fan.

[0065] The inlet and outlet of the regenerative incinerator are equipped with pneumatic switching valves to switch the direction of desorption gas flow.

[0066] The exhaust gas from the desorption zone is transported to the regenerative thermal oxidizer by the desorption fan, where the pollutants are oxidized and degraded into carbon dioxide and water vapor at high temperature.

[0067] The regenerative thermal oxidizer (RTO) has an explosion vent at the top, and explosion vents on the equipment are used to release pressure inside the furnace to prevent explosions. The RTO is equipped with a maintenance ladder and platform; the ladder is for personnel to walk on, and the platform houses the combustion system. A canopy is installed on the upper part of the ladder for rain and UV protection. A furnace access door is located at the top of the RTO for inspecting the furnace and installing the ceramic regenerator. The RTO's base is supported by H-beams, effectively bearing the load. A high-temperature proportional regulating valve is installed on the side of the RTO; this valve can withstand high temperatures and controls the flow of exhaust gas inside the furnace. The combustion system ensures complete combustion of the fuel gas within the furnace. A combustion air fan delivers outside air to the combustion chamber through combustion air ducts, increasing the oxygen concentration and enhancing combustion efficiency. The fuel gas is delivered to the combustion chamber through a fuel gas pipe. After high-temperature degradation, the exhaust gas from the desorption zone is delivered from the RTO outlet pipe to the chimney for compliant emissions.

[0068] After the zeolite rotor desorption is completed, the temperature is high and needs to be cooled down. Heat exchange is carried out using the room temperature gas after the zeolite rotor adsorption treatment, thereby reducing the temperature of the zeolite rotor desorption zone and restoring the adsorption function of the desorption zone.

[0069] The high-temperature heat exchanger is used for heat exchange, efficiently utilizing the heat in the regenerative thermal oxidizer to raise the temperature of the exhaust gas in the desorption zone. The high-temperature heat exchanger platform supports the weight of the heat exchanger. The exhaust gas from the desorption completion zone enters through the cold side inlet of the high-temperature heat exchanger, while the high-temperature gas from the regenerative thermal oxidizer enters through the hot side. Due to the significant temperature difference between the gas in the regenerative thermal oxidizer and the exhaust gas from the desorption completion zone, the temperature of the exhaust gas in the desorption completion zone rises, achieving heat exchange. The backflow blower uses air to blow the organic waste gas from the ceramic heat exchanger into the upper part of the regenerative thermal oxidizer for oxidation and degradation.

[0070] This invention provides a waste gas treatment system with improved removal efficiency, suitable for the treatment of volatile organic compounds (VOCs). Utilizing a zeolite rotor and a regenerative thermal oxidizer (RTO), the system separates and transforms pollutants in the waste gas, converting VOCs into harmless carbon dioxide and water vapor for emission standards. The system employs a RTO, which efficiently stores heat in a regenerator, saving natural gas consumption and reducing operating costs. A four-stage dry filter removes most particulate matter, offering advantages such as high filtration accuracy, no secondary pollution, and reusability. High-temperature heat exchangers further improve energy efficiency and reduce energy consumption.

[0071] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A waste gas treatment system for improving removal efficiency, characterized in that, include: A dry filter is installed at the system inlet pipe; A zeolite rotor, the adsorption inlet of which is connected to the outlet of the dry filter; An adsorption fan is installed between the adsorption outlet of the zeolite rotor and the chimney to transport the purified exhaust gas to the chimney for discharge. A high-temperature heat exchanger has its hot-side inlet connected to a regenerative incinerator and its hot-side outlet connected to a chimney; the cold-side inlet of the high-temperature heat exchanger is connected to the air outlet of the desorption completion zone of the zeolite rotor, and the cold-side outlet of the high-temperature heat exchanger is connected to the air inlet of the desorption zone of the zeolite rotor. A desorption fan is installed between the desorption zone outlet of the zeolite rotor and the regenerative thermal oxidizer to transport the exhaust gas from the desorption zone to the regenerative thermal oxidizer. The cold exhaust gas from the desorption completion zone of the zeolite rotor enters the high-temperature heat exchanger through the cold side inlet. After heat exchange, the heated exhaust gas enters the desorption zone of the zeolite rotor through the cold side outlet to desorb the zeolite in the desorption zone. The resulting higher concentration exhaust gas is then transported to the regenerative thermal oxidizer by the desorption fan for high-temperature degradation.

2. The waste gas treatment system for improving removal efficiency according to claim 1, characterized in that, Also includes: A differential pressure sensor is installed at the system inlet pipe to control the variable frequency operation of the adsorption fan; Both fire dampers and electric valves are installed at the system inlet pipe.

3. The waste gas treatment system for improving removal efficiency according to claim 1, characterized in that, The dry filter includes: a four-stage plate filter and a bag filter.

4. The waste gas treatment system for improving removal efficiency according to claim 1, characterized in that, Also includes: A fire sprinkler system is installed inside the zeolite rotor.

5. The waste gas treatment system for improving removal efficiency according to claim 1, characterized in that, Both the air inlet and outlet of the adsorption fan are connected by flexible connections.

6. The waste gas treatment system for improving removal efficiency according to claim 1, characterized in that, Also includes: A combustible gas concentration detector is installed in the first pipe connected to the air outlet of the desorption zone to detect the concentration of desorbed exhaust gas. A fresh air valve is installed at the inlet of the desorption fan. When the concentration of exhaust gas in the first duct is higher than a preset value, the fresh air valve opens, and the desorption fan supplies fresh air to the first duct to reduce the concentration of exhaust gas.

7. The waste gas treatment system for improving removal efficiency according to claim 6, characterized in that, Also includes: A flame arrester is installed at the outlet of the desorption fan.

8. The waste gas treatment system for improving removal efficiency according to claim 1, characterized in that, Also includes: The first pneumatic switching valve is located at the inlet of the regenerative incinerator; The second pneumatic switching valve is located at the outlet of the regenerative incinerator; The flow direction of the desorbed gas is switched by the on / off states of the first and second pneumatic switching valves.

9. The waste gas treatment system for improving removal efficiency according to claim 1, characterized in that, Also includes: A back-blowing fan uses air to blow the organic waste gas in the ceramic regenerator into the upper part of the regenerative incinerator for oxidation and degradation.

10. The waste gas treatment system for improving removal efficiency according to claim 1, characterized in that, Also includes: Explosion relief discs are installed at the outlet of the desorption fan and on the upper part of the regenerative incinerator.

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