Module system for treating volatile organic compounds

Abstract

A module system for treating volatile organic compounds (VOCs) includes an intake of VOC gas. A concentration unit generates concentrated VOC gas. A diversion valve controls the diversion ratio of the VOC gas between a concentration feed pipe and a diversion valve outlet pipe, wherein the sum of a first diversion ratio in the concentration feed pipe and a second diversion ratio in the diversion valve outlet pipe is 100%. A VOC removal unit removes VOCs at an operating temperature. A concentration discharge exhaust unit controls the concentration flow rate in the removal feed pipe. A removal intake unit controls the removal flow rate of the removal unit. The control equipment adjusts the concentration flow rate, removal flow rate, and diversion ratio to control the operating temperature and improve the concentration fluctuation range of the treated VOC gas.

Claims

1. A module system for processing volatile organic compounds, comprising: A volatile organic compound gas is introduced through one air inlet. A concentrated feed pipe is used to introduce the volatile organic compound gas; A concentration device is connected to the concentration feed pipe and the volatile organic compound gas is introduced through the concentration feed pipe to generate a concentrated volatile organic compound gas and an organic exhaust gas. A concentration discharge pipe is connected to the concentration equipment to discharge the concentrated volatile organic compound gas; A diversion valve is connected to the inlet, the concentrate feed pipe, and the diversion valve outlet pipe to control a diversion ratio of the volatile organic compound gas between the concentrate feed pipe and the diversion valve outlet pipe, wherein the concentrate feed pipe has a first diversion ratio, the diversion valve outlet pipe has a second diversion ratio, and the sum of the first diversion ratio and the second diversion ratio is not greater than 100%. A removal feed pipe is connected to the concentrate discharge pipe and the diverter valve discharge pipe; a volatile organic compound (VOC) removal device is connected to the removal feed pipe and introduces the VOC gas and the concentrated VOC gas from the concentrate discharge pipe through the diverter valve discharge pipe, such that the VOC gas and the concentrated VOC gas remove a VOC from the VOC gas and the concentrated VOC gas at an operating temperature, wherein the operating temperature includes a first operating temperature range, a second operating temperature range, a third operating temperature range, a fourth operating temperature range, and a fifth operating temperature range; a concentrate discharge exhaust device controls a concentration flow rate of the concentrated VOC gas introduced into the removal feed pipe, wherein the concentration flow rate includes a low concentration flow rate, a medium concentration flow rate, a high concentration flow rate, and a full concentration flow rate; A gas removal device controls the flow rate of the volatile organic compound gas and the concentrated volatile organic compound gas into the volatile organic compound removal device, wherein the flow rate includes a low removal flow rate, a medium removal flow rate, a high removal flow rate, and a full removal flow rate. The system also includes a control device electrically connected to the concentration discharge exhaust device, the removal intake device, the volatile organic compound removal device, and the diversion valve, which respectively adjust the concentration flow rate, the removal flow rate, a removal state of the volatile organic compound removal device, and the diversion ratio of the diversion valve to control the operating temperature and increase the concentration fluctuation range of the volatile organic compound gas processed by the volatile organic compound removal device.

2. The module system for processing volatile organic compounds as claimed in claim 1, wherein the first diversion ratio is 1% to 5%, the concentration flow rate is the low concentration flow rate, and the removal flow rate is the low removal flow rate, the volatile organic compounds are removed within the first operating temperature range.

3. The module system for processing volatile organic compounds as claimed in claim 1, wherein when the first diversion ratio is 1% to 5%, the concentration flow rate is the medium concentration flow rate, and the removal flow rate is the low removal flow rate, the volatile organic compounds are removed in the second operating temperature range which is greater than the first operating temperature range.

4. The module system for processing volatile organic compounds as claimed in claim 1, wherein when the first diversion ratio is 1% to 5%, the concentration flow rate is the high concentration flow rate, and the removal flow rate is the medium removal flow rate, the volatile organic compounds are removed in the third operating temperature range which is greater than the second operating temperature range.

5. The module system for processing volatile organic compounds as claimed in claim 1, wherein when the first diversion ratio is between greater than 5% and not greater than 40%, the concentration flow rate is the full concentration flow rate, and the removal flow rate is the high removal flow rate, the volatile organic compounds are removed in the fourth operating temperature range which is greater than the third operating temperature range.

6. The module system for processing volatile organic compounds as claimed in claim 1, wherein when the first diversion ratio is greater than 40% and not more than 100%, the concentration flow rate is the total concentration flow rate, and the removal flow rate is the total removal flow rate, the volatile organic compounds are removed in the fifth operating temperature range which is greater than the fourth operating temperature range.

7. The module system for processing volatile organic compounds as claimed in claim 1, wherein the volatile organic compounds are selected from the group consisting of alcohols, esters, aromatic hydrocarbons, alkanes with more than 2 Cs, alkenes, ketones, aldehydes, amines, nitriles, and ethers.

8. The module system for processing volatile organic compounds as claimed in claim 1, wherein the concentration equipment is selected from a group consisting of a concentration rotor module, an activated carbon tower, and a zeolite rotor module.

9. The module system for treating volatile organic compounds as claimed in claim 1, wherein the volatile organic compound removal equipment is selected from a group consisting of a regenerative thermal oxidizer (RTO), a catalytic regenerative thermal oxidizer (RCO), a catalytic oxidation unit (CTO), a direct combustion system (TO), and a condenser.

10. The module system for processing volatile organic compounds as claimed in claim 1, wherein the control device further dynamically sets at least one of a concentration threshold of the concentrated volatile organic compound gas and an upper or lower limit of the operating temperature based on at least one of the process operation mode and exhaust characteristics, as a basis for selecting at least one of the diversion and module.

11. The module system for processing volatile organic compounds as claimed in claim 1, wherein the diversion valve is selected from a group consisting of pneumatic valves, electric valves, sliding valves and ball valves, and the switching of the diversion valve is driven in real time by the control device based on a determination result.

12. The module system for processing volatile organic compounds as claimed in claim 1, wherein the module system is a modular layout with flexible cascading and quantity adjustment capabilities, and is dynamically configured according to at least one of the concentration flow rate, the removal flow rate, the split ratio, and the operating temperature.

13. The module system for processing volatile organic compounds as described in claim 1, further comprising: An emergency discharge pipe is connected to the inlet end of the diversion valve, wherein when at least one of the concentration feed pipe and the removal feed pipe is malfunctioning, under maintenance, or overloaded, the control device automatically switches the volatile organic compound gas to an emergency discharge mode that enters the emergency discharge pipe.

14. The module system for processing volatile organic compounds as claimed in claim 13, wherein the emergency exhaust pipe is connected to a backup module system, the backup module system including another module system for processing volatile organic compounds as claimed in claim 1.

15. The module system for processing volatile organic compounds as claimed in claim 1, wherein the control device further comprises a group selected from nondispersive infrared, Fourier transform infrared spectroscopy, a lower explosive limit combustible gas detector, a photoionization detector, a hot-wire flow device, and a temperature sensor.

16. The module system for processing volatile organic compounds as claimed in claim 1, further comprising: An exhaust pipe is connected to the concentration equipment to discharge the organic exhaust gas.

17. The module system for processing volatile organic compounds as claimed in claim 16, further comprising: An exhaust end is connected to the volatile organic compound removal equipment and the exhaust pipe to discharge a removed exhaust gas from the volatile organic compound removal equipment and the organic exhaust gas from the exhaust pipe.

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