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Equipment and method for recovering volatile organic compounds

A volatile organic compound and equipment technology, which is applied in the field of volatile organic compound recovery equipment, can solve the problems of complex equipment structure and processing process, low work efficiency, and many components, and achieve improved resource utilization, low cost, and high purification. efficiency effect

Inactive Publication Date: 2020-03-24
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main VOCs recovery equipment is relatively large, with many components, complex equipment structure and processing flow, low work efficiency, large energy consumption, and high cost

Method used

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  • Equipment and method for recovering volatile organic compounds
  • Equipment and method for recovering volatile organic compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] like figure 1 As shown, a device for recovering volatile organic compounds includes a circulating fluidized bed 1, a primary cyclone separator 2, a desorber 3 and a condenser 4; the circulating fluidized bed 1 is provided with a bottom inlet 5 and a lower inlet 6. The top outlet 7, the first lower return port 8 and the second lower return port 9, the bottom inlet 5 is used to input VOCs-containing gas, the lower inlet 6 is used to input adsorbent, the top outlet 7 is connected with the first stage The inlet of the cyclone separator 2 is connected, and the first lower return port 8 and the inlet of the desorber 3 are all connected with the solid outlet of the primary cyclone separator 2; the desorber 3 is provided with a first outlet 10 and a second outlet 11. The first outlet 10 communicates with the condenser 4, and the second outlet 11 communicates with the second lower return port 9.

[0050] Industrial emissions containing 500mg / m 3 Toluene gas, exhaust gas temper...

Embodiment 2

[0052] like figure 2 As shown, a device for recovering volatile organic compounds includes a circulating fluidized bed 1, a primary cyclone separator 2, a desorber 3 and a condenser 4; the circulating fluidized bed 1 is provided with a bottom inlet 5 and a lower inlet 6. The top outlet 7, the first lower material return port 8 and the second lower material return port 9, the bottom inlet 5 is used to input VOCs-containing gas, the lower material inlet 6 and the adsorbent storage tank 12 (considering the wear of the adsorbent loss, the adsorbent storage tank 12 regularly replenishes fresh adsorbent to maintain the system circulation) is communicated for inputting the adsorbent, and the top outlet 7 is communicated with the inlet of the primary cyclone separator 2; the gas outlet of the primary cyclone separator 2 is connected with the The inlet of the secondary cyclone separator 13 is communicated, the solid outlet of the secondary cyclone separator 13 is communicated with the...

Embodiment 3

[0055] The equipment for recovering volatile organic compounds is the same as in Example 2.

[0056] Divinyl styrene ethyl spherical resin with a particle size of 0.6 mm is used as an adsorbent to purify industrial emissions containing 200 mg / m 3 The exhaust gas of butyl acetate, the temperature is 25°C, the relative humidity is 60%, enters from the bottom of the circulating fluidized bed 1, and the air volume is 25000m 3 / h. The flow ratio of the first return pipe 14 and the desorber 3 is adjusted to 5:1, and the temperature of the desorber 3 is 150°C. The desorbed butyl acetate gas enters the condenser 4 under the action of the induced draft fan 17 and is condensed into a liquid state without producing noncondensables. Measured by gas chromatography, the butyl acetate content in the evacuated gas above the secondary cyclone separator 13 is lower than 10 mg / m 3 , The purification efficiency of butyl acetate reaches more than 95%.

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Abstract

The invention provides equipment and a method for recovering volatile organic compounds. The equipment for recovering the volatile organic compounds comprises a circulating fluidized bed, a primary cyclone separator, a desorber and a condenser. The method for recovering the volatile organic compounds comprises the following steps: an adsorbent and a VOCs-containing gas are contacted and adsorbed in the circulating fluidized bed and then enter the primary cyclone separator to separate the VOCs-adsorbed adsorbent from the gas, one part of the VOCs-adsorbed adsorbent returns to the circulating fluidized bed, and the other part of the VOCs-adsorbed adsorbent enters the desorber to be desorbed; the desorbed adsorbent returns to the circulating fluidized bed, desorbed VOCs enter the condenser tobe condensed to obtain liquid, and the uncondensed gas returns to the circulating fluidized bed to be subjected to circulating treatment. According to the equipment and method for recycling the volatile organic compounds, the equipment is small in size, low in energy consumption, simple in technological process and high in working efficiency.

Description

technical field [0001] The invention relates to the field of volatile organic compound treatment, in particular to a device and method for recovering volatile organic compounds. Background technique [0002] Volatile organic compounds (Volatile organic compounds, referred to as VOCs) are relatively common and ubiquitous air pollutants in the atmosphere. Common components include hydrocarbons, benzene series, alcohols, ketones, phenols, esters, amines, etc., and their sources are very extensive, not only industrial stationary sources such as petrochemicals, paint coatings, and leather production, but also There are mobile sources such as motor vehicle exhaust. In particular, the emissions from industrial stationary sources are often relatively high, which not only causes environmental pollution but also increases the waste of resources. Therefore, the effective recovery and treatment of VOCs is of great significance. [0003] There are two types of VOCs treatment methods: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/12
CPCB01D53/12B01D2257/708B01D2259/4009
Inventor 梁鹏焦甜甜张文睿朱佳楠张华伟张亚青王世伟王晓斌
Owner SHANDONG UNIV OF SCI & TECH
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