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Rotary hearth furnace smoke comprehensive treatment system and method

A comprehensive treatment, rotary hearth furnace technology, applied in combustion methods, steam generation methods using heat carriers, furnaces, etc., can solve the problems of substandard flue gas emissions, scaling and blockage of the flue gas heat exchange system of rotary hearth furnaces , to achieve the effect of solving the cost of use, good industrialization prospects, and improving heat transfer efficiency

Pending Publication Date: 2020-04-10
NANJING CHANGRONG ACOUSTIC INC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a device and method for comprehensive treatment of flue gas from a rotary hearth furnace, which can solve the problem of fouling and blockage in the flue gas heat exchange system of a rotary hearth furnace; Scale and dust removal, prolong the service life of the bag filter; at the same time solve the problem of non-standard flue gas emission

Method used

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  • Rotary hearth furnace smoke comprehensive treatment system and method
  • Rotary hearth furnace smoke comprehensive treatment system and method
  • Rotary hearth furnace smoke comprehensive treatment system and method

Examples

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Embodiment 1

[0034] Such as figure 1 As shown, this embodiment provides a comprehensive treatment system for flue gas of a rotary hearth furnace, which includes a rotary hearth furnace 1, a high-temperature flue gas outlet of the rotary hearth furnace 1 is connected to a waste heat boiler 2, and the outlet of the waste heat boiler 2 is connected to an air heat exchanger 3. The air heat exchanger 3 is connected to the bag filter 4, the outlet end of the bag filter 4 is connected to the cyclone dust collector 6 through a pipe, a fan 5 is arranged on the pipe, and the cyclone dust collector 6 is connected to the chimney 7. In this embodiment, the high-temperature flue gas from the rotary hearth furnace 1 enters the waste heat boiler 2 for heat exchange and cooling. The flue gas from the waste heat boiler 2 is further connected to the air heat exchanger 3 for heat exchange. 3. Install the adjustable frequency high sound intensity sonic soot blower 31, the sound wave output port of the adjustable...

Embodiment 2

[0037] This embodiment is a further improvement on the basis of the above embodiment 1, such as figure 2 As shown, the bag filter 4 includes a dust collector body, a dust filter bag 41 arranged inside the dust collector body, and a collecting bucket 43 arranged at the bottom of the dust collector body. The inlet of the bag filter 4 is arranged at the lower part of the dust collector body. Below the dust filter bag 41, the outlet of the bag filter 4 is arranged above the dust filter bag 41 on the upper part of the dust collector body. The dust collector body is provided with a first sonic wave agglomeration device 42. The output end faces the inside of the dust collector. By installing the first acoustic wave agglomeration device 42 on the bag filter 4, the dust particles in the ultrafine dust flue gas can be agglomerated and enlarged by sound waves, and then better filtered by the dust filter bag 41, which effectively improves Dust removal efficiency and dust removal effect.

Embodiment 3

[0039] This embodiment is a further improvement on the basis of embodiment 2, such as image 3 As shown, the cyclone dust collector 6 includes a multi-stage cyclone dust removal unit 61, a transition cavity is provided between adjacent cyclone dust removal units, and a second acoustic wave agglomeration device 62 is provided on the transition cavity; the cyclone dust collector 6 is the most The inlet of the cyclone dust collector 6 is arranged below the cyclone ash removal unit at the lower end, the ash hopper 63 is arranged at the bottom end, and the outlet of the cyclone dust collector 6 is arranged at the top. Both the collection bucket (43) and the ash bucket (63) are installed in a detachable manner, which is convenient for replacement and cleaning at any time.

[0040] The rotary hearth furnace flue gas comprehensive treatment system provided in this embodiment is used to process the converter flue gas. The ultrafine dust flue gas removed by the bag filter 4 enters the cyclo...

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Abstract

The invention relates to a rotary hearth furnace smoke comprehensive treatment system and method. The treatment system comprises a rotary hearth furnace, a high-temperature smoke outlet of the rotaryhearth furnace is connected with a waste heat boiler, an outlet of the waste heat boiler is connected with an air heat exchanger, the air heat exchanger is connected with a bag type dust collector, anoutlet of the bag type dust collector is connected with a cyclone dust collector through a pipeline, and the cyclone dust collector is connected with a chimney. A frequency-adjustable high-sound-intensity acoustic wave soot blower located on the air heat exchanger can conduct effective blockage removing and descaling on the air heat exchanger; after zinc-containing metal dust and other metal dustenter the bag type dust collector, ultrafine particles are aggregated into large particles through a first acoustic wave aggregation device, and the metal dust recovery efficiency of the bag type dust collector is improved; the bag type dust collector is further subjected to real-time blockage removing, the service life of the bag type dust collector is prolonged, the cost is reduced, and high-sound-intensity acoustic waves conduct collaborative efficiency improving and descaling on the bag type dust collector in the rotary hearth furnace smoke system; and the ultralow emission requirement for smoke of the rotary hearth furnace is met on the front section of the chimney through an acoustic wave aggregation dedusting device.

Description

Technical field [0001] The invention relates to a system and method for comprehensive treatment of flue gas from a rotary hearth furnace. The invention belongs to the technical field of high-temperature flue gas treatment, and particularly relates to a method for preventing adhesion and blockage of a flue gas system of a rotary hearth furnace. The flue gas contains zinc metal dust Recycling, the technical field of ultra-low emission control of flue gas. Background technique [0002] Although the existing rotary hearth furnace flue gas treatment system can realize the basic flue gas recycling treatment, because the high-temperature flue gas passes through the waste heat boiler and heat exchanger often clogging, the blockage of the flue gas system causes the production and operation of the rotary hearth furnace A series of consequences: the blockage of the flue gas system causes a positive pressure in the rotary hearth furnace, which further leads to gas overflow, destroys the redu...

Claims

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Application Information

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IPC IPC(8): F27D17/00F22B1/18F28G7/00F23L15/00
CPCF27D17/004F27D17/008F22B1/18F28G7/00F23L15/00F27D2017/009Y02E20/34Y02P10/25
Inventor 方健刘宇清张荣初
Owner NANJING CHANGRONG ACOUSTIC INC
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