How to do the leakage detection of solvent recovery device? Fix "three steps and one closed loop": delimit the seal point account, detect point by point according to frequency, repair and re-inspect beyond punctuation point, and finally record the whole chain into the account to form a closed loop. Most of the leakage of the device comes from the dynamic and static sealing points of flange, screw thread, pump seal and valve packing. The leakage of single point is not large, and the accumulated solvent loss and unorganized emission throughout the year are not small. It is the most easily ignored account besides the recovery rate and emission index to pass the sealing point periodically.
First, check with the site according to the device drawings, and register all the dynamic and static sealing points that may leak one by one: location, medium, pressure grade, sealing form and accessibility, and number them point by point. Unreachable points are classified separately, and the reasons and alternative monitoring methods are explained. The ledger is the bottom book shared by testing, repair and re-inspection. Once the number is determined not to be changed at will, the newly added sealing points of the device renovation will be recorded in time, and the removed labels will be canceled to ensure the consistency of the accounts.
The frequency is divided into grades according to the importance of the point position: the high concentration section, the pump seal and the frequently operated valve are in one grade, and the detection period is short; The stationary flange in the normal temperature and low concentration section is in the second gear, and the period is relaxed. The device will be encrypted for the first round after being newly put into operation or overhauled, and will be changed to normal after being stable. The principle of testing arrangement is to spend limited manpower in the section with many historical problems and high medium risk. See the following table for frequency division and judgment:
| Point-to-point gear | Typical location | detection and processing |
|---|---|---|
| A program | Pump seal, high concentration section flange, constant action valve | Short cycle detection, repair when exceeding standard |
| Second gear | Normal temperature static flange, screw thread and instrument interface | Routine cycle detection, select the opportunity to eliminate leakage |
| Unreachable point | Sealing points in the insulation layer and in the enclosed area | Registration of alternative methods, inspection of maintenance window |
| determination and repair | Determine the limit value according to the control requirements implemented by the enterprise, and repair the exceeding punctuation listing deadline. | |
The conventional practice is to scan the field instruments point by point, and cooperate with visual observation of drip traces and listening to identify leakage. The response of the testing instrument shall be checked regularly with standard gas to ensure that the batch data before and after are comparable. The judgment limit value shall be determined according to the emission control requirements implemented by the enterprise, and the points that do not meet the standard shall be listed and registered on the spot: the point number, the detection value, the detection date and the responsible person shall be filled in item by item, and the weather and working conditions on the detection day shall be recorded together to avoid being unable to reproduce afterwards.
LuoyangWohong PetrochemicalEquipment Co., Ltd. provides leak detection cooperation in device operation and maintenance services: helping enterprises to build sealing point ledgers, on-site inspection according to the frequency of sub-files, guiding repair and rechecking the sales numbers beyond punctuation points, summarizing the detection and repair data into operation and maintenance reports on a monthly basis, and putting them together with the device recovery rate and energy consumption data to see the trend.
Needed. The quality of screw thread sealing and flange fastening in the installation stage of the new device is different. The leakage ratio in the first round is often higher than that of the old device that has been in operation for many years. It is most cost-effective to do a round of full coverage inspection in the early stage of operation to expose the problem during the warranty period.
Registration shall be listed first and temporary control shall be made according to the medium condition, which can be handled immediately with pressure fastening. If parking is required, it shall be included in the maintenance plan to eliminate leakage within a time limit. During this period, it shall be encrypted for observation to prevent small leakage from being dragged into leakage expansion.
There is no uniform value for all over the world, and it is classified according to the medium characteristics, sealing form and historical detection data. The reference method is to take the leakage point trend of your own device as the baseline, maintain the status quo continuously and smoothly, and encrypt the detection before abnormal amplification.
Luoyang wo hong petrochemical equipment co., ltd. provides services such as establishment of ledger of sealing point of recovery unit, on-site leak detection and repair re-inspection. welcome to contact and exchange.
This article is organized by Luoyang wohong petrochemical equipment co., ltd. if you need leakage checking and elimination arrangement or operation and maintenance service, please contact.
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