工業(yè)精萘顏色重是什么原因導致的？實際上不管是液體的還是固體的，存放時間長了都會變深，液體的為明顯，可能里面多苯環(huán)物質與空氣氧化的原因吧，總之里面肯定有物質易被空氣氧化。酚油也是這個現象，剛剛出來的是無色水狀，過段時間就變暗紅了。

What causes the heavy color of industrial naphthalene? In fact, whether it is liquid or solid, it will become deeper after being stored for a long time. The liquid is more obvious. Maybe there are many benzene ring substances in it and the reason for air oxidation. In short, there must be substances in it that are easy to be oxidized by air. Phenolic oil is also this phenomenon. It just comes out in colorless water, and it turns dark and red after a period of time.

如果是每次開工時一個階段顏色發(fā)黃，有可能是設備、管道的鐵銹。如果是經常性的，說明精萘當中的少量雜質容易氧化，可以進一步提高精萘純度，或者在操作環(huán)節(jié)減少氧化。

If the color turns yellow at one stage of each construction, it may be the rust of equipment and pipeline. If it is regular, it indicates that a small amount of impurities in refined naphthalene are easy to oxidize, which can further improve the purity of refined naphthalene or reduce oxidation in operation.

變色應該是由白變淡紅色，再變成紅棕色，后變成黑棕色吧。如果是說明工業(yè)萘中的雜酚脫除不干凈的緣故。酚類物質在陽光照射下，所帶的羥基易被空氣氧化成羰基，這樣酚類就變成了醌類物質啦，而醌類物質是工業(yè)染料一個大種類。醌類如苯醌、萘醌等等。

The color change should be from white to light red, then red brown, then black brown. If this is the reason why the impurity phenol in industrial naphthalene is not removed cleanly. Under sunlight, the hydroxyl group of phenols is easy to be oxidized into carbonyl group by air, so phenols become quinones, and quinones are a major category of industrial dyes. Quinones such as benzoquinone, naphthoquinone, etc.

針對工業(yè)萘顏色變深的原因分析，從兩個方面對系統(tǒng)進行了改造，一方面改善萘油洗滌系統(tǒng)的洗滌脫酚效果;另-方面在工業(yè)萘原料槽底部增加放酚鹽管線。

According to the analysis of the reasons for the darkening of industrial naphthalene, the system has been reformed from two aspects: on the one hand, the washing and dephenolization effect of naphthalene oil washing system has been improved; On the other hand, phenol salt discharge pipeline shall be added at the bottom of industrial naphthalene raw material tank.

1)改善萘油洗滌系統(tǒng)的洗滌脫酚效果的措施是萘油洗滌系統(tǒng)增加管道混合器。

1) The measure to improve the washing and dephenolization effect of naphthalene oil washing system is to add pipeline mixer in naphthalene oil washing system.

原萘油洗滌系統(tǒng)萘油和稀堿在噴射混合器內進行混合反應，進入洗滌塔后澄清分離，生成合格的脫酚萘油和中性酚鹽。在系統(tǒng)運行中，由于萘油和稀堿只在噴射混合器接觸反應，時間短，反應效果低，為增加反應時間，增強反應效果，在萘油洗滌塔的噴射混合器后，另增加管道混合器，以增強脫酚效果。

The naphthalene oil and dilute alkali of the original naphthalene oil washing system are mixed and reacted in the jet mixer. After entering the washing tower, they are clarified and separated to produce qualified dephenolized naphthalene oil and neutral phenol salt. During the system operation, because naphthalene oil and dilute alkali only react in contact with the jet mixer, the reaction time is short and the reaction effect is low. In order to increase the reaction time and enhance the reaction effect, another pipeline mixer is added after the jet mixer of naphthalene oil scrubber to enhance the dephenolization effect.

2)工業(yè)萘原料槽增加放酚鹽管線。

2) The phenol salt discharge pipeline is added to the industrial naphthalene raw material tank.

為了保證工業(yè)萘蒸餾時酚鹽不被帶入蒸餾系統(tǒng)，對工業(yè)萘原料槽增加放酚鹽管線到地下放空槽，投用前將底部酚鹽放凈，避免酚鹽進入蒸餾系統(tǒng)影響工業(yè)萘顏色。

In order to ensure that the phenol salt will not be brought into the distillation system during the distillation of industrial naphthalene, the phenol salt pipeline will be added to the raw material tank of industrial naphthalene to the underground vent tank, and the phenol salt at the bottom will be drained before use to prevent the phenol salt from entering the distillation system and affecting the color of industrial naphthalene.

系統(tǒng)經過改造，增加的管道混合器能夠滿足工藝要求，工業(yè)萘原料槽增加的放酚鹽管線也運行正常，產品的質量和顏色得到明顯改善。

The system has been revamped, and the added pipeline mixer can meet the process requirements, and the added phenol discharge pipeline of the industrial naphthalene raw material tank also operates normally, and the product quality and color have been significantly improved.

通過對工業(yè)萘產品進行定性地分析，確定了導致工業(yè)萘顏色變深的主要原因，并制定實施了與之相對應的措施，增加了萘油洗滌的脫酚效果，提高了酚類產品的回收率，工業(yè)萘產品的顏色得到了較大的改善。針對此產品您有需求就來我們網站http://m.2cgg.com咨詢吧！

Through qualitative analysis of industrial naphthalene products, the main causes of darkening of industrial naphthalene were determined, and corresponding measures were formulated and implemented to increase the dephenolization effect of naphthalene oil washing, improve the recovery rate of phenolic products, and greatly improve the color of industrial naphthalene products. Come to our website if you have any demand for this product http://m.2cgg.com Ask!