With the continuous improvement of environmental regulations on gas station oil and gas emissions, many gas stations that have already built secondary oil and gas recovery systems are facing the need to upgrade to tertiary recovery. Secondary recycling mainly solves the problem of oil and gas collection in the refueling and unloading processes, while tertiary recycling further concentrates the collected oil and gas to achieve standard emissions and oil recovery. Transformation is not simply adding a device, but a system engineering that involves evaluation, selection, construction, and commissioning. This article outlines the key steps in upgrading gas stations from secondary recycling to tertiary recycling.
Before upgrading and renovating, a complete evaluation of the existing secondary recovery system in the station should be conducted, including the direction and sealing status of the oil and gas recovery pipeline, the recovery efficiency of the fuel gun, the setting of the breathing valve in the underground oil storage tank, and the existing electrical and explosion-proof conditions. The evaluation results determine the renovation plan: stations with intact pipelines can retain the original collection pipelines and only need to install three processing devices; Stations with aging pipelines or poor sealing require synchronous repair of the pipelines, otherwise the effectiveness of the new device will be greatly reduced.
The selection of the tertiary recycling device is based on the processing capacity, mainly referring to the total volume of the oil tank, daily oil turnover, and unloading frequency. The WHSH series covers a processing range of 4 to 20 cubic meters per hour. Small stations can choose low processing capacity models to meet the demand, while large stations or high turnover stations should choose higher processing capacity models. At the same time, it is necessary to confirm the on-site installation conditions: the pry mounted device has a small footprint, a short installation cycle, and is suitable for renovation projects; If the on-site space is limited, it is necessary to evaluate the equipment placement and pipeline connection plan.
The tertiary recovery device needs to be connected to the existing oil and gas recovery main pipeline, and the oil and gas from the breathing valves of each oil tank should be converged to the processing device. During construction, efforts should be made to minimize the length of newly added bends and pipe sections, and maintain the slope of the pipeline to facilitate the reflux of condensate. The interface between new and old pipelines must undergo sealing and airtightness testing to prevent oil and gas leakage. Strict approval and on-site safety protection are required for hot work operations. During the renovation period, the oil tank area must be isolated according to regulations.
Renovation construction usually requires short-term station stops or zone operations, and construction windows should be planned in advance to avoid peak oil consumption periods. After the equipment installation is completed, conduct no-load trial operation and on load debugging, with a focus on verifying the treatment effect and exhaust concentration under unloading conditions. After passing the debugging, it will be officially put into operation, and the on-site personnel will be trained to master the equipment start stop, alarm handling, and daily inspection methods. After the renovation is completed, the site can obtain direct economic benefits through the recycling of oil products while meeting environmental requirements.
From secondary recycling to tertiary recycling, the upgraded processing capacity yields dual benefits of environmental compliance and oil recovery. By completing the four stages of evaluation, selection, construction, and commissioning, the renovation project can be successfully implemented.
Mr. Li 13526990215
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