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Condensing adsorption catalytic oxidation device and method for treating water vapor VOCs of fuel oil

An adsorption, catalysis and oxidation device technology, applied in chemical instruments and methods, gas treatment, separation methods, etc., can solve the problems of catalytic oxidation of high intake air concentration, temperature rise of light components, blockage of heat exchangers, etc., to ensure long-term stability. Periodic continuous discharge up to the standard, convenient and quick on-site installation, and the effect of solving the problem of temperature rise

Pending Publication Date: 2018-12-14
NANJING DOULE REFRIGERATION EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for treating fuel oil containing water vapor VOC s The condensation adsorption catalytic oxidation device and method can couple the technical advantages of condensation technology, adsorption and catalytic oxidation, and solve the problem of water vapor blocking the heat exchanger during the condensation process, the problem of temperature rise during the adsorption process, and the emission of light components such as carbon dioxide.
Based on the analysis of the physical properties of organic media in VOCs containing water vapor such as crude oil, gasoline, naphtha, and the analysis and calculation of energy consumption and temperature of condensation technology, the distribution of cooling capacity in the cold field is determined, and two parallel heat exchangers are used to refrigerate with one refrigeration compressor to solve the condensation and crystallization of water vapor in VOCs For the problem of ice blockage, reduce the concentration of adsorbed intake air through condensation pretreatment, solve the problem of temperature rise in the adsorption system, solve the problem of excessively high concentration of intake air through catalytic oxidation through the adsorption system, and use catalytic oxidation to decompose light VOCs in gasoline, naphtha, and water vapor Hydrocarbons such as carbon two, to ensure long-term continuous emission standards

Method used

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  • Condensing adsorption catalytic oxidation device and method for treating water vapor VOCs of fuel oil
  • Condensing adsorption catalytic oxidation device and method for treating water vapor VOCs of fuel oil

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The equipment is used to treat South Pass crude oil shipment containing water vapor VOCs gas volume 3500Nm 3 / h.

[0033] First start the condensation system to condense the VOCs waste gas containing water vapor from the crude oil shipment to -75°C, and use gas chromatography equipped with FID detectors to detect the VOCs at the condensation inlet and outlet and the adsorption outlet. The detection is continuous for 3 days, and samples are taken every 3 hours. The concentration of VOCs exhaust gas containing water vapor in condensed imported crude oil is 60g / m 3 ~600g / m 3 , the concentration of VOCs waste gas containing water vapor contained in the adsorption export crude oil is 4.1g / m 3 ~12g / m 3 , where the exhaust gas concentration at the outlet to be adsorbed is stably lower than 20g / m 3 30 minutes after turning on the electric heater, start the air fan. At this time, the motor heat is automatically turned off, and the temperature of the catalytic oxidation react...

Embodiment 2

[0035] The equipment is used to treat gasoline loading and top filling with water vapor VOCs gas volume of 2000Nm 3 / h.

[0036] First start the condensation system to condense the VOCs waste gas containing water vapor from the crude oil shipment to -75°C, and use gas chromatography equipped with FID detectors to detect the VOCs at the condensation inlet and outlet and the adsorption outlet. The detection is continuous for 3 days, and samples are taken every 3 hours. The concentration of VOCs exhaust gas containing water vapor in condensed imported crude oil is 50g / m 3 ~400g / m 3 , the concentration of VOCs waste gas containing water vapor contained in the adsorption of exported crude oil is 3g / m 3 ~16g / m 3 , where the exhaust gas concentration at the outlet to be adsorbed is stably lower than 20g / m 3 30 minutes after turning on the electric heater, start the air fan. At this time, the motor heat is automatically turned off, and the temperature of the catalytic oxidation re...

Embodiment 3

[0038] The equipment is used to treat VOCs containing water vapor in naphtha loading with a gas volume of 2000Nm 3 / h.

[0039] First start the condensation system to condense the VOCs waste gas containing water vapor from the crude oil shipment to -75°C, and use gas chromatography equipped with FID detectors to detect the VOCs at the condensation inlet and outlet and the adsorption outlet. The detection is continuous for 3 days, and samples are taken every 3 hours. The concentration of VOCs exhaust gas containing water vapor in condensed imported crude oil is 80g / m 3 ~900g / m 3 , the concentration of VOCs waste gas containing water vapor contained in the adsorption of export crude oil is 6g / m 3 ~18g / m 3 , where the exhaust gas concentration at the outlet to be adsorbed is stably lower than 20g / m 3 30 minutes after turning on the electric heater, start the air fan. At this time, the motor heat is automatically turned off, and the temperature of the catalytic oxidation react...

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Abstract

The invention discloses a condensing adsorption catalytic oxidation device and method for treating water vapor VOCs of fuel oil. The device comprises: a VOCs conveying system, a condensing system, anadsorption system and a catalytic oxidation system. The method comprises: (1) stepwise cooling water vapor VOCs of high concentration fuel oil through the condensing system, a first temperature cold field, a second temperature cold field and a third temperature cold field, (2) feeding the condensed normal temperature gas into the adsorption system and further reducing the concentration of organicwaste gas through the adsorption system in a double-tank adsorption vacuum analysis mode, and (3) treating gas with small gas condensation fluctuation through the catalytic oxidation system so that the light components in the low-concentration organic waste gas are catalytically oxidized into CO2 and H2O and the fuel oil water vapor VOCs satisfying the standards is discharged. The device and method combine the technical advantages of the condensation technology, adsorption and catalytic oxidation and solve the problem that water vapor blocks a heat exchanger in the condensation process, the temperature is increased in the adsorption process and a light component such as C2 satisfying the standards is discharged.

Description

technical field [0001] The invention relates to the field of environmental protection technology, in particular to a method for treating water vapor VOC in fuel oil s Condensation adsorption catalytic oxidation device and method. Background technique [0002] Crude oil, gasoline and naphtha are common fuel oils in the petrochemical industry. They are easy to evaporate and lose during transportation, storage, production and use. The volatilized oil gas is also called organic waste gas, that is, VOCs are mainly carbon 4, carbon 5 and Carbon six, and a small amount of carbon one, carbon two, carbon three and carbon seven. According to statistics, the volume fraction of organic solvents is as high as about 30% in the oil and gas volatilized from gasoline tanks. The physical and chemical properties of naphtha and gasoline are similar, especially light naphtha, whose distillation range is 70°C to 145°C, and light naphtha from some refineries is more volatile than gasoline. Crud...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/44
CPCB01D53/002B01D53/02B01D53/8687B01D2257/708
Inventor 张贵德朱志平孙罡赵向雨张林薛文波周志军张杰张剑侠刘金波
Owner NANJING DOULE REFRIGERATION EQUIP