【Daily Question No. 322】November 24, 2018
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【Daily Question No. 322】November 24, 2018: Briefly describe the purging procedure for heat exchangers. 1. Drain the medium from the vent device and purge any remaining oil with nitrogen gas. 2. Use purge steam to remove all water. 3. The pipeline outlet is equipped with a blind flange that opens inward to allow steam to be discharged. 4. The main drain valve at the bottom of the shell and tube side of the heat exchanger is opened. 5. Introduce steam slowly; when purging the tube side, the drain valve at the lowest point of the shell side should be opened. When purging the shell side, the condensate drain valve on the tube side opens. 6. Pressuring and water hammering are strictly prohibited. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
1. Drain the medium from the vent device and purge any remaining oil with nitrogen gas. 2. Use purge steam to remove all water. 3. The pipeline outlet is equipped with a blind flange that opens inward to allow steam to be discharged. 4. The main drain valve at the bottom of the shell and tube side of the heat exchanger is opened. 5. Introduce steam slowly; when purging the tube side, the drain valve at the lowest point of the shell side should be opened. When purging the shell side, the condensate drain valve on the tube side opens. 6. Pressuring and water hammering are strictly prohibited.
1. Drain the medium from the vent device and purge any remaining oil with nitrogen gas. 2. Use purge steam to remove all water. 3. The pipeline outlet is equipped with a blind flange that opens inward to allow steam to be discharged. 4. The main drain valve at the bottom of the shell and tube side of the heat exchanger is opened. 5. Introduce steam slowly; when purging the tube side, the drain valve at the lowest point of the shell side should be opened. When purging the shell side, the condensate drain valve on the tube side opens. 6. Pressuring and water hammering are strictly prohibited.
Close the inlet and outlet valves — Drain the material from the heat exchanger — Steam purging
⑴Put on the protective equipment； ⑵Prepare tools and equipment such as walkie-talkies and F-wrenches ； ⑶Modify the purging process ； ⑷Steam line drain ； ⑸Slowly open the steam purge valve ； ⑹Check the purging condition for water hammer and pressure buildup.
1. Preparation: Set up the process properly to prevent medium leakage. 2. Introduce a cooling source: Slightly open the vent, then open the inlet valve; once the system pressure is balanced, close the bypass valve
⑴Put on the protective equipment； ⑵Prepare tools and equipment such as walkie-talkies and F-wrenches ； ⑶Modify the purging process ； ⑷Steam line drain ； ⑸Slowly open the steam purge valve ； ⑹Check the purging condition for water hammer and pressure buildup.
(1) The purging process for the tube side and shell side must be completed before steam purging can be carried out, in order to prevent equipment damage due to overpressure. (2) During steam purging, the one-way heat absorption capacity of the steam heat exchanger must be taken into account; when purging in one direction, the vent valve on the other side must be opened. (3) After purging, shut off the steam, drain all remaining water, and prepare for repair.
1. Drain the medium from the vent device and purge any remaining oil with nitrogen gas. 2. Use purge steam to remove all water. 3. The pipeline outlet is equipped with a blind flange that opens inward to allow steam to be discharged. 4. The main drain valve at the bottom of the shell and tube side of the heat exchanger is opened. 5. Introduce steam slowly; when purging the tube side, the drain valve at the lowest point of the shell side should be opened. When purging the shell side, the condensate drain valve on the tube side opens. 6. Pressuring and water hammering are strictly prohibited.
1. Drain the medium from the vent device and purge any remaining oil with nitrogen gas. 2. Use purge steam to remove all water. 3. The pipeline outlet is equipped with a blind flange that opens inward to allow steam to be discharged. 4. The main drain valve at the bottom of the shell and tube side of the heat exchanger is opened. 5. Introduce steam slowly; when purging the tube side, the drain valve at the lowest point of the shell side should be opened. When purging the shell side, the condensate drain valve on the tube side opens. 6. Pressuring and water hammering are strictly prohibited.
⑴Put on the protective equipment； ⑵Prepare tools and equipment such as walkie-talkies and F-wrenches ； ⑶Modify the purging process ； ⑷Steam line drain ； ⑸Slowly open the steam purge valve ； ⑹Check the purging condition for water hammer and pressure buildup.