How to test the air tightness of new gasification equipment, including the flash evaporation part
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This post was finally edited by GSP on 2010-6-20 21:43. Let’s discuss it. Thank you.
You don’t have to worry about this. The technician will compile it. When the time comes, you will see the popularity. Many questions will be encountered in future operations. I want to ask because I don’t know. There is a test run plan for something like this, just ask your technician for it.
Since the pressures at each stage of flash evaporation are different, they need to be airtight separately. The gasifier can be airtight together with the scrubber, and medium-pressure nitrogen can be used.
Rambling ~ 100 Questions I downloaded before, where can I find the link now?
When the entire gasification system is undergoing water intermodal transportation, the system is pressurized to the pressure required for airtightness.
The air tightness test is divided into three pressure levels: high, medium and low. Accident nitrogen and oxygen are high-pressure systems. Use an accident nitrogen compressor to pressurize and check for leaks. There are multiple requirements for the charging pressure.； The medium-pressure system is the gasification furnace and scrubber syngas system. Medium-pressure nitrogen is used to pressurize and check for leaks. There are multiple requirements for the pressurization. ； Low-pressure systems include flash steam systems, high flash, low flash, and true flash. Low-pressure nitrogen is used to pressurize to check for leaks. There are multiple requirements for the charging pressure. For true flash, a vacuum test is required. ； in principle: If the gasification device can be subjected to a hydraulic pressure test, a hydraulic pressure test must be performed. Never perform a pneumatic pressure test, as there are certain risk factors.
Equipment with different pressures needs to be airtight separately
The pressure in different sections is different, and it is divided into several parts according to the upper pressure limit. For example, the flash evaporation side can be stamped with a compressed air system, and then the leakage can be checked.
Reply 1# lzl8792 The hydrostatic test should be carried out after passing the non-destructive testing and heat treatment. The test procedure is as follows: (1) Before the test, the fastening bolts of each connecting component must be fully assembled, and two calibrated pressure gauges with the same range must be installed on the test device in a place convenient for observation. (2) The test site should have reliable safety protection devices. Stop work unrelated to the test and evacuate personnel unrelated to the test. (3) After filling the boiler and pressure vessel with water, use the vent valve on the top to drain the internal gas. Check that the outer surface is dry. (4) Slowly increase the pressure to the maximum working pressure, and then continue to increase the pressure to the specified test pressure after confirming that there is no leakage. Welded boilers shall be maintained at test pressure for 5 minutes ； The pressure vessel should maintain pressure for 10 to 30 minutes depending on its volume. Then reduce to the maximum working pressure for inspection. The pressure should remain constant during the inspection.