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Fine desulfurization purification process for waste lubricating oil hydrogenation tail gas

A waste lubricating oil and purification process technology, which is applied in the direction of magnesium/calcium/strontium/barium sulfide/polysulfide, chemical instruments and methods, and separation of dispersed particles, can solve the problem of insufficient removal accuracy and can not meet the requirements of waste lubricating oil Requirements for fine desulfurization of hydrogenation tail gas, how to deal with other issues involved, to achieve the effect of improving absorption efficiency, stable structure, and improving absorption accuracy

Pending Publication Date: 2022-02-25
湖北润驰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Invention patent CN104611058B discloses a hydrorefining process of waste lubricating oil. This process belongs to the leader in this field. It first pretreats the waste lubricating oil and then enters the hydrogenation reactor to contain S, N, O, Cl organic matter is converted to H 2 S, NH 3 、H 2 O, HCl, but did not address how to deal with these pollutants
At present, the removal of hydrogen sulfide is often absorbed by adsorbents such as zinc oxide and iron manganese, which often require certain absorption conditions, or the removal accuracy is not enough
The high content of sulfur-containing substances in waste lubricating oil, in the face of increasingly stringent environmental protection requirements, the existing hydrogen sulfide removal process can no longer meet the fine desulfurization requirements of waste lubricating oil hydrogenation tail gas

Method used

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  • Fine desulfurization purification process for waste lubricating oil hydrogenation tail gas

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Effect test

Embodiment 1

[0033] A lubricating oil hydrotreating unit in Tianmen, Hubei Province processed a certain batch of recovered waste lubricating oil, and the hydrogenation tail gas contained 3609mg / m 3 H 2S, 522 mg / m 3 HCl, the tail gas treatment is carried out through the fine desulfurization process provided by the present invention. Exhaust gas first passes through liquid paraffin absorption tank 1 to absorb organic components, and then enters NaOH solution absorption tank 21, NaOH solution absorption tank 22, NaOH solution absorption tank 23, NaOH solution absorption tank 21, NaOH solution absorption tank 22, NaOH solution absorption tank 23 Take series connection, NaOH solution absorption tank 24 and NaOH solution absorption tank 25 are standby, the mass concentration of NaOH solution is 50%, and the anion polyacrylamide is equipped with in the NaOH solution absorption tank, and its concentration is 0.3% of the NaOH solution quality. The gas that comes out from NaOH solution absorption ...

Embodiment 2

[0035] A lubricating oil hydrotreating unit in Tianmen, Hubei Province processed a batch of recycled waste lubricating oil, and the hydrogenation tail gas contained 309mg / m 3 H 2 S, 36mg / m 3 HCl, the tail gas treatment is carried out through the fine desulfurization process provided by the present invention. Exhaust gas first passes through liquid paraffin absorption tank 1 to absorb organic components, and then enters NaOH solution absorption tank 21, NaOH solution absorption tank 22, NaOH solution absorption tank 23, NaOH solution absorption tank 21, NaOH solution absorption tank 22, NaOH solution absorption tank 23 Take parallel connection, NaOH solution absorption tank 24 and NaOH solution absorption tank 25 are standby, the mass concentration of NaOH solution is 30%, and the NaOH solution absorption tank is equipped with anionic polyacrylamide, and its concentration is 0.05% of the NaOH solution quality. The gas that comes out from NaOH solution absorption tank 21, NaOH...

Embodiment 3

[0037] A lubricating oil hydrorefining unit in Tianmen, Hubei Province processed a certain batch of recovered waste lubricating oil, and the hydrogenation tail gas contained 1216mg / m 3 H 2 S, 154 mg / m 3 HCl, the tail gas treatment is carried out through the fine desulfurization process provided by the present invention. Exhaust gas first passes through liquid paraffin absorption tank 1 to absorb organic components, and then enters NaOH solution absorption tank 23, NaOH solution absorption tank 24, NaOH solution absorption tank 25, NaOH solution absorption tank 23, NaOH solution absorption tank 24, NaOH solution absorption tank 25 Take series connection, NaOH solution absorption tank 21 and NaOH solution absorption tank 22 are standby, the mass concentration of NaOH solution is 40%, and the NaOH solution absorption tank is equipped with anionic polyacrylamide, and its concentration is 0.1% of the NaOH solution quality. The gas that comes out from NaOH solution absorption tank...

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Abstract

The invention discloses a fine desulfurization purification process for waste lubricating oil hydrogenation tail gas. According to the process, after organic components in tail gas are absorbed by a liquid paraffin absorption tank, high-S-content components in the tail gas are removed step by step through a NaOH solution absorption tank, a basic cupric carbonate absorption tower, a CaO absorption tower, an anhydrous sodium thiosulfate absorption tower, a molecular sieve absorption tower, a noble metal catalyst absorption tower, a dimethylacetamide absorption tower and a liquid paraffin absorption tank soaked with metal sodium, so that fine desulfurization is realized, and Cl-containing components can be removed at the same time. The whole process is free of pollution emission, simple in procedure and flexible to use.

Description

technical field [0001] The invention relates to a fine desulfurization and purification process, which is especially suitable for the fine desulfurization and purification of waste lubricating oil hydrogenation tail gas. Background technique [0002] Today's society is developing rapidly, and the number of vehicles, ships, and mechanical equipment has increased exponentially, which will lead to a series of contradictions between economic development and environmental protection. One of the most prominent problems is waste lubrication. Oil production is a growing threat to the environment. Waste lubricating oil has been included in the "National Hazardous Waste List", numbered HW08. According to regulations, waste mineral oil refers to various waste engine oil, waste gasoline, waste diesel oil, Waste crude oil, waste vacuum pump oil, waste gear oil, waste hydraulic oil, waste heat treatment oil, waste transformer oil and other mineral oil-based lubricating oils that lose the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/75B01D53/78B01D53/52B01D53/82B01D53/68B01D53/26B01D53/04B01D53/86C01B17/42C01B17/43
CPCB01D53/1487B01D53/75B01D53/78B01D53/52B01D53/685B01D53/263B01D53/04B01D53/86C01B17/42C01B17/43B01D2251/304B01D2251/604B01D2251/602B01D2251/404B01D2253/108
Inventor 王瑜陈凯王俊杰杨贞武王佳豪李玲隆顺均龙来覃晓阳李浩唐盈张先茂
Owner 湖北润驰环保科技有限公司