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Recovery processing method for hydrocarbon-contained waste gas

A technology for recycling and waste gas, which is applied in the field of recycling and processing, and can solve the problems of long process flow, economic impact, and economic decline.

Inactive Publication Date: 2010-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of condensation and catalytic oxidation can recover most of the volatile hydrocarbons, and can also achieve up-to-standard discharge of tail gas, but its disadvantages are that the process is long, the operation cost is high, and the economy is affected
Maximizing the recovery of hydrocarbons in the tail gas can increase the income, but generally speaking, when the recovery rate of hydrocarbons reaches a certain limit, the operating costs required to further increase the recovery rate will increase greatly, so the overall economy will decline; Comprehensive emission requirements, how to determine the recovery and treatment methods and control conditions of hydrocarbon-containing waste gas, and ensure the maximum economy under the premise of meeting the emission standards, are the key research issues that need to be studied in the recovery and treatment of hydrocarbon-containing waste gas

Method used

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  • Recovery processing method for hydrocarbon-contained waste gas
  • Recovery processing method for hydrocarbon-contained waste gas

Examples

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Embodiment 1

[0017] A certain gasoline oxidative sweetening tail gas and liquid hydrocarbon oxidative sweetening tail gas, the temperature is about 40°C, and the total hydrocarbon concentration is 30×10 4 ~80×10 4 mg / m 3 . The packed tower with two-stage packing is used, the packing is Φ25mm×25mm×6mm stainless steel Pall ring packing, and the volume ratio of the upper packing and the lower packing is 3:1.

[0018] The fresh diesel oil is normal second-line diesel oil with an initial boiling point of 200°C. It comes from the fractionation tower of the refinery unit at a temperature of 60°C. After heat exchange and cooling to 8°C, it enters the packed tower. The designed volume ratio of fresh diesel oil to the exhaust gas at the inlet of the packed tower is 0.08 (due to large fluctuations in exhaust gas flow during operation, the ratio also fluctuates in a large range), the amount of circulating diesel oil is 4 times the volume of fresh diesel oil, and the design value of the volume flow s...

Embodiment 2

[0024] A gas oil storage tank area and a waste oil tank area discharge exhaust gas, the temperature is about 40°C, and the total hydrocarbon concentration is 9×10 4 ~40×1 0 4mg / m 3, the sulfide concentration is 1000mg / m 3 about. First use sodium hydroxide solution to absorb and remove sulfide, after the sodium hydroxide solution absorbs, the sulfide concentration is lower than 10mg / m 3 , and then carry out distillate oil absorption-activated carbon adsorption treatment. Distillate oil absorption adopts a packed tower with two-stage packing. The packing is Φ25mm×25mm×6mm stainless steel Pall ring packing. The volume ratio of the upper packing and the lower packing is 1:1.

[0025] The fresh distillate oil is heavy naphtha with an initial boiling point of 90°C. It comes from the fractionation tower of the refinery unit at a temperature of 40°C. After heat exchange and cooling to -20°C, it enters the packed tower. The fresh heavy naphtha and the exhaust gas at the inlet of th...

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Abstract

The invention discloses a recovery processing method for a hydrocarbon-contained waste gas, which comprises the following steps of: absorbing distillate oil and adsorbing by using active carbon; carrying out distillate oil absorption treatment on the hydrocarbon-contained waste gas; carrying out active carbon absorption treatment on the adsorbed tail gas; and exhausting the tail gas adsorbed by the active carbon. The absorption treatment of the distillate oil adopts a padding tower; two sections of padding are charged into the padding tower; the low-temperature fresh distillate oil at -30-15 DEG C enters the padding tower from the upper part of the padding tower; the recycling distillate oil recycled at the bottom of the padding tower is introduced between the two sections of padding; and the hydrocarbon-contained waste gas enters the padding tower from the lower part of the padding tower and sequentially passes through the two sections of padding in the padding tower. Compared with the prior art, the method has the advantages of simple, economic and reasonable process, conformity of environmental-protection standard, and the like.

Description

technical field [0001] The invention relates to a method for recovering and treating hydrocarbon-containing waste gas, in particular to a method for recovering and treating exhaust gas from oil product storage tanks, tail gas from oxidative sweetening of light hydrocarbons and the like. Background technique [0002] Various oil product storage tanks, waste oil storage tanks, etc. generally discharge a certain amount of exhaust gas under normal operating conditions. These exhaust gases contain relatively high concentrations of hydrocarbons, and sometimes some non-hydrocarbon substances, such as hydrogen sulfide, Organic sulfides, etc., if not effectively recycled, will cause a lot of waste of resources on the one hand, and cause serious environmental pollution on the other hand, and there will be certain safety hazards at the same time. [0003] The recovery and treatment methods of hydrocarbon-containing waste gas discharged from oil storage tanks are more commonly used, suc...

Claims

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Application Information

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IPC IPC(8): B01D53/00
Inventor 刘忠生任龙王海波郭兵兵刘璐
Owner CHINA PETROLEUM & CHEM CORP
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