A method for continuous treatment of organic waste gas based on circulating fluidized bed system

A technology of circulating fluidized bed and organic waste gas, which is applied in the direction of chemical instruments and methods, separation methods, combustion methods, etc., and can solve the problems of failure to provide a good material replenishment method, powdery adsorbent blockage heat, and equipment cold and hot Alternate circulation and other issues to achieve good heat transfer performance, avoid bed explosion, and high mass transfer rate

Active Publication Date: 2022-07-05
JIANGSU NANFANG COATING & ENVIRONMENT PROTECTION EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the activated carbon tower in this process needs to be cyclically switched between adsorption and desorption, which is inconvenient to operate, and there is a potential risk of local overheating and ignition of activated carbon
Utility model patent CN208694621U discloses a zeolite runner-catalytic combustion system for treating organic waste gas. The regeneration gas preheating unit is equipped with furnace gas mixing and direct heating after combustion waste heat exchange, which improves the utilization rate of combustion heat energy, but the In the system, the adsorption area and the desorption area are the same part, and there is still the problem of alternating heating and cooling of the equipment, and there are moving parts
However, additional heating pipes are arranged in the desorption fluidized bed, which increases energy consumption and increases the flow resistance in the bed, which increases the power consumption of the fan; no gas-solid separation device is arranged on the desorption fluidized bed, so that the powdery There is overflow loss of adsorbent particles; the high-temperature adsorbent particles returned after desorption are first returned to the adsorbent storage tank for storage without loose wind, which may easily cause blockage of powdered adsorbent and heat accumulation to catch fire
[0007] In addition, the fluidized bed system, especially the circulating fluidized bed system, inevitably has adsorbent particle wear and overflow loss, and the above patents also fail to provide a good method for timely replenishment of materials

Method used

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  • A method for continuous treatment of organic waste gas based on circulating fluidized bed system
  • A method for continuous treatment of organic waste gas based on circulating fluidized bed system
  • A method for continuous treatment of organic waste gas based on circulating fluidized bed system

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Embodiment 1

[0083] like figure 1 The structure of the circulating fluidized bed system 1 adopted by the method for continuous treatment of organic waste gas based on the circulating fluidized bed system shown, the system includes: organic waste gas main pipe 1, fluidization fan 2, riser intake pipe Tube bottom fluidization air chamber 6, riser air distribution plate 7, riser 12, riser separator 13, desorption chamber 15, desorption chamber air distribution plate 16, desorption carrier gas air chamber 17, desorption chamber separator 18. Feed leg 19, desorption chamber discharge pipe 20, regeneration fan 23, heat exchanger 24, VOCs gas incinerator 25, electric heater 26, exhaust flue 27, induced draft fan 28. The air outlet of the organic waste gas main pipe 1 is provided with a fluidization fan 2, and the air outlet of the fluidization fan 2 is connected to the air inlet of the fluidization air chamber 6 at the bottom of the riser through the riser inlet pipe 5, and the lift pipe 12 is li...

Embodiment 2

[0102] like figure 2 As shown, further, based on the above-mentioned system 1, the present invention also provides an improved circulating fluidized bed system 2 that can realize continuous treatment of organic waste gas. In addition to the components in system one, system two also adds a return device, also known as a particle circulation control device, whose function is not only to adjust and control the particle circulation to achieve the required particle circulation rate; 12 to the desorption chamber 15 "back-channeling" flow, especially for the present system where the reaction process and gas composition in the riser 12 and the desorption chamber 15 are different, it is particularly important to prevent the gas "back-channeling". The material-returning device includes a material-returning valve 21 , a material-returning air booster fan 22 and a corresponding connecting air duct. The return device includes a return valve 21, a return air booster fan 22 and a correspon...

Embodiment 3

[0106] like image 3 As shown, further, based on the above-mentioned system 2, the present invention also provides an improved circulating fluidized bed system 3 capable of realizing continuous treatment of organic waste gas. In addition to the components in system two, system three also includes a feeding device. The feeding device includes a silo 10 for holding adsorbent particles, a high-pressure screw feeder 11, and the high-pressure screw feeder 11 is arranged in the adsorption The front wall feeding port 121 of the riser 12 of the device and the high-pressure screw feeder 11 are arranged below the silo 10; the catalyst particles in the riser 12 are passed from the silo 10 through the high-pressure screw feeder 11 from the riser 12. into the feeding port 121 of the front wall. In addition, an upper pressure measuring point 902 and a lower pressure measuring point 901 are arranged on the riser 12 , the lower pressure measuring point 901 is arranged on the upper side of th...

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PUM

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Abstract

The invention discloses a continuous treatment method for organic waste gas based on a circulating fluidized bed system, which belongs to the field of environmental protection. The steps of the method are as follows: the organic waste gas to be treated fluidizes the adsorbent particles in the riser, and the adsorbent particles adsorb the VOCs gas components in the organic waste gas; The adsorbent particles fall into the desorption chamber; the desorption uses a high-temperature carrier gas to fluidize the adsorbent particles in the desorption chamber and desorb the VOCs gas components attached to the adsorbent particles, thereby regenerating the adsorbent particles and returning them to lift tube; the concentrated waste gas containing high-concentration VOCs gas carrying some adsorbent particles is separated from gas and solid, and the concentrated waste gas enters the incineration device and is incinerated and oxidized to be degraded into harmless high-temperature exhaust gas. in the flue. The method of the invention makes the adsorbent particles in a fluidized state, and has high adsorption and desorption efficiency and high heat utilization rate.

Description

technical field [0001] The invention relates to the field of organic waste gas treatment, in particular to a method for continuous treatment of organic waste gas based on a circulating fluidized bed system. Background technique [0002] Volatile Organic Compounds (VOCs) include non-methane hydrocarbons, oxygen-containing organics, chlorine-containing organics, nitrogen-containing organics, sulfur-containing organics, etc. harm. VOCs come from a wide range of sources and are generated during production, transportation or storage in petrochemical, transportation, printing, painting, pharmaceutical, furniture and other industries. my country's environmental protection departments have also put forward increasingly stringent requirements for the management of VOCs in various industries. [0003] There are many VOCs treatment technologies, including adsorption method, absorption method, thermal oxidation method, biodegradation method, low-temperature plasma method, photocatalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/12F23G7/06
CPCB01D53/12Y02A50/20
Inventor 李爱军柯希玮
Owner JIANGSU NANFANG COATING & ENVIRONMENT PROTECTION EQUIP
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