Circulating fluidized bed system for continuously treating organic waste gas

A circulating fluidized bed and organic waste gas technology, which is applied in gas treatment, incinerator, air quality improvement, etc., can solve the problem of failure to provide a good material replenishment method, powdered adsorbent blocking heat, and alternating heating and cooling of equipment Circulation and other issues, to achieve good heat transfer performance, avoid bed explosion, and high mass transfer rate

Pending Publication Date: 2020-10-09
JIANGSU NANFANG COATING & ENVIRONMENT PROTECTION EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Circulating fluidized bed system for continuously treating organic waste gas
  • Circulating fluidized bed system for continuously treating organic waste gas
  • Circulating fluidized bed system for continuously treating organic waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] like figure 1 A circulating fluidized bed system 1 for realizing the continuous treatment of organic waste gas is shown. The system includes: an organic waste gas main pipe 1, a fluidization fan 2, a riser air intake main pipe 5, a fluidization wind chamber 6 at the bottom of the riser, 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 lifted. The discharge port 123 of ...

Embodiment 2

[0084] 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 for realizing continuous treatment of organic waste gas. In addition to the components in system 1, system 2 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 corresponding co...

Embodiment 3

[0088] 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 for 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 the riser...

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Abstract

The invention discloses a circulating fluidized bed system for realizing continuous treatment of organic waste gas and belongs to the field of environmental protection. The system comprises an adsorption device, a desorption device, an incineration device, a heat recovery device and an air supply system; the adsorption device is used for fluidizing adsorbent particles in a lifting pipe (12) and adsorbing VOCs gas components in organic waste gas; the desorption device is used for fluidizing adsorbent particles in a desorption chamber (15) and removing VOCs gas components, so that the adsorbentparticles are regenerated; the incineration device is used for incinerating concentrated waste gas generated by regeneration of the adsorbent particles; the heat recovery device is used for recoveringheat in high-temperature tail gas output by the incineration device and converging the tail gas subjected to heat exchange into a tail gas flue (27); and the air supply system is used for supplying organic waste gas to the adsorption device and providing desorption carrier gas to the desorption device. According to the system of the invention, the adsorbent particles in the adsorption device andthe desorption device are in a fluidized state, and therefore, the adsorption and desorption efficiency is high, a heat utilization rate is high, and long-term continuous stable treatment can be achieved.

Description

technical field [0001] The invention belongs to the field of organic waste gas treatment, in particular to a circulating fluidized bed system for realizing continuous treatment of organic waste gas. 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, photocatalysis metho...

Claims

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Application Information

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IPC IPC(8): B01D53/12B01D53/26B01D46/00F23G7/06
CPCB01D46/00B01D53/12B01D53/26B01D2257/708F23G7/06Y02A50/20
Inventor 李爱军柯希玮
Owner JIANGSU NANFANG COATING & ENVIRONMENT PROTECTION EQUIP
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