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Coal gangue circulating fluidized bed calcinator device

A technology of circulating fluidized bed and coal gangue, which is applied in fluidized bed furnaces, furnaces, furnace components, etc., can solve the problems of large floor area, poor quality, and high operation and combustion costs, so as to improve the utilization effect and improve the vanadium grade , Simplify the roasting process and the effect of the system

Inactive Publication Date: 2016-03-16
伍蔚恒 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing traditional crafts are flat kilns and vertical kilns, which have low output and poor quality; while tunnel kilns need to be built more than 100 meters long, require a lot of investment, low production capacity, and occupy a large area. In addition, high-quality fuel diesel or gas must be added to the combustion section to support combustion. , the operation and combustion costs are high, and the system is complex

Method used

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  • Coal gangue circulating fluidized bed calcinator device
  • Coal gangue circulating fluidized bed calcinator device
  • Coal gangue circulating fluidized bed calcinator device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] like figure 1 , figure 2 , image 3 and Figure 4 As shown, the vanadium-containing low calorific value coal gangue circulating fluidized bed roaster device includes a combustion chamber 1, a fly ash circulation system 2, a secondary roasting and heat preservation area 3, an evaporation heating surface 4, and an ash cooler 5.

[0032] The furnace does not arrange a water-cooled wall heating surface in the main body (1-1) of the fluidized bed combustion chamber. Vanadium coal gangue and matching lime are put into the furnace and then ignited with charcoal. The heat released by the combustion of vanadium coal gangue is used to increase the temperature of the furnace body, flue gas and ash, and continuously heat the subsequent coal gangue into the furnace. The temperature of the furnace can be raised to 950-1000°C, so that the coal gangue with high ash content, high moisture content and low calorific value can be fully burned to complete the purpose of decarbonization...

Embodiment 2

[0037] like figure 1 , image 3 , Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the hood of the air distribution plate (3-2) is a small hole type, the hood is longer, there are many holes on it, the aperture is small, the pressure of the fan is high, and this area The material in the section is not fluidized, so that the ash and slag accumulated here can supplement oxygen, and complete the secondary roasting, decarburization and heat preservation.

[0038] To meet the requirements of the vanadium extraction process, the roasted materials are discharged from the discharge pipe (3-3) to the ash cooler (5) to recover the physical heat in the ash, and adjust the speed of the ash cooler to control the secondary roasting and heat preservation The thickness of the material layer in the area, the storage capacity of the material and the holding time, and the ash and slag are sent to the vanadium extraction system by the conveyor after cooling do...

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Abstract

The invention discloses a coal gangue circulating fluidized bed calcinator device. The coal gangue circulating fluidized bed calcinator device comprises a fluidized bed combustion chamber (1), a fly ash circulating system (2), a secondary roasting and heat preservation area (3), a heating surface (4) and an ash cooler (5), wherein the fluidized bed combustion chamber (1) and the secondary roasting and heat preservation area (3) are communicated through an overflow port (1-3); the fly ash circulating system (2) and the heating surface (4) are connected with a smoke exhaust pipe of the fluidized bed combustion chamber (1); the ash cooler (5) and the secondary roasting and heat preservation area (3) are connected, and the ash cooler (5) is used for collecting ash. The coal gangue circulating fluidized bed calcinator device can directly use bulk coal gangue which are not balled and 0-6 mm in low-calorific-value particle diameter, and heat obtained by combustion of the coal gangue can maintain operation of the whole coal gangue circulating fluidized bed calcinator device. In addition, the ash obtained after the coal gangue containing vanadium is processed has good vanadium grade and can be directly used for vanadium extraction.

Description

technical field [0001] The invention belongs to the technical field of industrial furnace combustion systems, and more specifically relates to a coal gangue circulating fluidized bed roasting furnace device. Background technique [0002] my country's vanadium-bearing stone coal reserves are extremely rich, with reserves of 18.7 billion tons, widely distributed in Hunan, Hubei, Guizhou, Zhejiang, Jiangxi, Shaanxi, Anhui and other places. Most of them are associated with other metals, and vanadium-containing coal gangue is the main raw material for extracting vanadium at present. Its calorific value is very low, and the grade of vanadium is also very different. Add a certain proportion of high-quality coal, crush it into 100-mesh powder, and send it to a flat kiln, vertical kiln or tunnel kiln after being air-dried into balls, and roast and keep warm at about 850 ° C. After the roasted product is cooled, it will be acid-leached to extract vanadium. The existing traditional cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B15/00F27B15/10F27B15/14F27B15/16F27D17/00
CPCF27B15/00F27B15/10F27B15/14F27B15/16F27D17/004
Inventor 伍蔚恒伍亦勇
Owner 伍蔚恒
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