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A volatile organic compound adsorption and desorption treatment and resource recovery device

A volatile organic compound and resource recovery technology, applied in organic chemistry, gas treatment, adsorption purification/separation, etc., to achieve high heat exchange efficiency, avoid water scaling, and solve the effect of heat and cold alternation

Active Publication Date: 2021-08-27
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a volatile organic compound adsorption and desorption treatment and resource recovery device, which mainly solves the technical problem that the temperature swing pressure swing adsorption treatment of VOCs has not been implemented industrially, and the bed pressure drop of the adsorber is low. Under certain circumstances, it is required to achieve high heat exchange efficiency in the process of desorption heating up and cooling down for standby; to solve the problem of air hammer caused by direct switching between heating steam and cold water in the existing adsorber, steam and cold water are set using steam-water mixers, and hot water is installed Realize the process of gradually cooling down and heating up with the cold water tank, solve the problem of alternating heat and cold, and use desalinated water to avoid potential water scaling problems

Method used

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  • A volatile organic compound adsorption and desorption treatment and resource recovery device
  • A volatile organic compound adsorption and desorption treatment and resource recovery device
  • A volatile organic compound adsorption and desorption treatment and resource recovery device

Examples

Experimental program
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Effect test

Embodiment

[0048] Such as figure 2 As shown, a volatile organic compound adsorption and desorption treatment and resource recovery device includes an adsorption and desorption unit, a water circulation unit and a vacuum unit; the adsorption and desorption unit includes an induced draft fan 1 and a VOCs waste gas buffer tank 2 With the two adsorbers 3; VOCs exhaust gas is also called VOCs exhaust gas, including organized exhaust gas and unorganized exhaust gas; the induced draft fan 1 can be a centrifugal fan, a Roots fan, etc., and the selection of the type belongs to common knowledge, and will not be repeated. VOCs exhaust gas is connected to the inlet of induced draft fan 1, and the outlet of induced draft fan 1 is connected to the inlet of VOCs exhaust gas buffer tank 2 through the second valve V2. The outlet of induced draft fan 1 is also connected in parallel to the safety exhaust pipeline through the first valve V1. When the system is operating normally, the second valve V2 is ope...

example 1

[0072] Example 1, if a styrene manufacturer discharges waste gas, the total concentration of styrene in the tail gas is 3.5×105mg / m 3 , the total amount of exhaust gas reaches 300m 3 / h. use as figure 2 and 3 Process scheme shown for processing. The styrene tail gas is led to the adsorption device by the fan. When the adsorption device is abnormal or in an emergency state, the shut-off valve is quickly switched to the emergency emptying to ensure the safety of the device. The exhaust gas introduced by the fan is sent to the buffer tank to remove the liquid and dust solids carried by the exhaust gas. The pretreated styrene tail gas enters the tubular fixed-bed adsorber, and is safely discharged at high altitude after treatment. The adsorbent is 3-6 mm silane-modified silicon dioxide and modified activated carbon pellets are packed in the fixed bed tubes at a ratio of 1:1 from top to bottom. The specification of the tubes is Φ38*3.5, and the ratio of the heat exchange are...

example 2

[0075] Example 2, if a hydrogen peroxide manufacturer discharges waste gas, the tail gas contains a variety of heavy aromatics, the content of which is as high as 4500ppm, and the total waste gas reaches 36000Nm 3 / h. use as figure 2 and 3 Process scheme shown for processing. The styrene tail gas is led to the adsorption device by the fan. When the adsorption device is abnormal or in an emergency state, the shut-off valve is quickly switched to the emergency emptying to ensure the safety of the device. The exhaust gas introduced by the fan is sent to the buffer tank to remove the liquid and dust solids carried by the exhaust gas. The pretreated tail gas enters the coiled radial fixed bed adsorber, and is safely discharged at high altitude after treatment. The adsorbent is 3-6mm silane-modified silicon dioxide and is packed in the shell side of the fixed bed. The specification of the tubes is Φ19*2, and the ratio of the heat exchange area of ​​the adsorber to the loading ...

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Abstract

The invention discloses a volatile organic matter adsorption and desorption treatment and resource recovery device, comprising an adsorption and desorption unit, a water circulation unit and a vacuum unit; the adsorption and desorption unit includes an induced draft fan (1), VOCs waste gas Buffer tank (2) and two absorbers (3), described water circulation unit has two sets, respectively comprises cooler (4), circulating water tank (5) and circulating water pump (6); Described circulating water pump ( 6) A steam-water mixer (12) is connected in series between the outlet and the heat exchanger inlet of the adsorber (3), and the air inlets of the two adsorbers (3) are also connected to a vacuum unit. Through the connection of multiple valves, the adsorption and desorption are controlled. It ensures that the temperature of the adsorption bed is maintained at the optimum desorption or analysis temperature. The way of water circulation avoids the phenomenon of excessive local temperature caused by direct steam heating.

Description

technical field [0001] The invention relates to the technical field of environmental protection and mechanical structure, in particular to a volatile organic compound (VOCs) adsorption and desorption treatment and resource recovery device. Background technique [0002] Volatile organic compounds (VOCs) emitted by industrial enterprises can cause great harm to human health and the atmospheric environment. It can not only directly damage the human respiratory and digestive system, but also have a photochemical reaction with NOx in the atmosphere, causing deep-seated environmental problems. [0003] At present, VOCs treatment technologies include two categories: destruction and recycling. The destruction technology is to directly decompose VOCs into carbon dioxide and water through biochemical reactions, mainly including biological treatment, catalytic combustion, ozone oxidation, photocatalysis, etc. These methods usually have high operating costs and high energy consumption....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04C07C7/12C07C15/46
CPCB01D53/0407B01D53/0438B01D2257/708B01D2259/40083C07C7/12C07C15/46
Inventor 黄龙陈建华高乐杜松松常锦
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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