Issues such as purging media for o-xylene tank cleaning
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This post was last edited by lvshan2004-9 on 2010-9-20 14:31 for advice: 1. Is it feasible to make an o-xylene storage tank with an internal floating roof without nitrogen sealing? 2. What medium is used to purge the o-xylene tank or the pipeline is on fire? 3. Is it necessary to install a drainage well next to the o-xylene tank? That is, should the materials discharged from the sewage outlet of the o-xylene tank be temporarily sealed in a container or discharged directly into the sewage well? 4. What pump is most suitable for transporting o-xylene?
first question: Not sure 2. Generally, nitrogen is used for purging. 3. I don’t know how big your storage tank is. Generally speaking, it is impossible for a pump to clean out all the materials in the tank. At this time, it is necessary to rely on the sewage well to clean the materials in the tank. If it is formal, it must be collected in a container.
Reply 2# tzyc First of all, thank you for your advice. My tank is 2000 meters tall. I made a drain hole with a drain pipe. The drain pipe is located below the bottom of the tank. I connected the pipeline from the drain outlet to the discharge pipe of the tank. You mean that the sewage pipe is not a sewage pipe that directly discharges into the sewage well inlet, but a container is used to pick up the materials coming out of the sewage pipe, right?
Reply 1# lvshan2004-9 The replies to the three questions are as follows: 1. The o-xylene storage tank is made into an internal floating roof without nitrogen sealing. It can be made into an internal floating roof tank according to Section 4.2.4 of SH/T 3007-2007. However, o-xylene is a moderately hazardous medium. If you add nitrogen sealing, it will definitely be beneficial to the environment. 2. Nitrogen purging is required when cleaning o-xylene tanks or when pipelines are on fire. 3. O-xylene has a certain degree of toxicity. The sewage needs to be discharged into the light pollution oil pipeline of the whole plant in a sealed manner and into the light pollution oil tanks of the whole plant. It cannot be discharged into the sewage well.
Reply 4# snec1 “The replies to the three questions are as follows: 1. The o-xylene storage tank is made into an internal floating roof without nitrogen sealing. It can be made into an internal floating roof tank according to Section 4.2.4 of SH/T 3007-2007. However, o-xylene is a moderately hazardous medium. If you add nitrogen sealing, it will definitely be beneficial to the environment. 2. Nitrogen purging is required when cleaning o-xylene tanks or when pipelines are on fire. 3. O-xylene has a certain degree of toxicity. The sewage needs to be discharged into the light pollution oil pipeline of the whole plant in a sealed manner and into the light pollution oil tanks of the whole plant. It cannot be discharged into the sewage well. ” Thank you for your advice. Regarding the third question, there is no sewage oil pipeline in the factory. I think the sewage outlet should be equipped with double valves that are always closed. When cleaning the tank, the material inside is first pumped out through the pump (from the connecting pipe between the sewage pipe and the outlet of the storage tank). When there is a small amount left, open the valve on the sewage pipe and use a bucket to collect the remaining material. Is this possible?
1. The internal floating roof does not need to be sealed with nitrogen, and there are no requirements for the specifications inside the tank. 2. Nitrogen 3. Whether it can directly discharge sewage depends on the requirements of sewage treatment and whether it has the ability to treat this kind of sewage. 4. Preferred canned pump