Aluminum oxide roaster vertical fluidized bed and powder flow cooling method

A roaster, alumina technology, applied in fluidized bed furnaces, furnace cooling, furnaces, etc., can solve the problems of inability to recover heat from cooling water, waste of powder energy, etc., to facilitate transportation, ensure product quality, and strengthen heat exchange. Effect

Active Publication Date: 2017-07-21
张金波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a vertical fluidized bed of an alumina roasting furnace and a powder flow cooling method to solve the problem in the prior art that the fluidized bed needs a blower to push the material forward, and cannot recover heat from the cooling water And the problem of energy waste caused by re-baking of powder

Method used

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  • Aluminum oxide roaster vertical fluidized bed and powder flow cooling method
  • Aluminum oxide roaster vertical fluidized bed and powder flow cooling method
  • Aluminum oxide roaster vertical fluidized bed and powder flow cooling method

Examples

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Embodiment

[0029] Example: see figure 1 with 2 , a vertical fluidized bed for an alumina roaster, comprising a support, a heat exchange unit arranged on the support, and a control system, the heat exchange unit includes at least one heat exchange module, and the heat exchange module is arranged in parallel up and down It consists of heat exchangers, wherein the heat exchange tubes of adjacent heat exchangers are arranged alternately up and down, the upper part of the heat exchange unit is provided with a feeding unit, and the lower part is provided with a discharge valve, and the feeding unit is provided with a high material A level sensor and a low material level sensor, the high material level sensor and the low material level sensor are respectively electrically connected to the controller signal input end of the control system, and the output end of the controller is connected to the discharge valve, which according to the The sampling results of the high material level sensor and t...

Embodiment 2

[0034] Example 2: see image 3 , the structure of embodiment 2 is basically the same as that of embodiment 1, and the similarities will not be repeated. The difference is that a filter plate is arranged below the cloth sieve plate, and the side walls around the filter plate and the cloth sieve plate are all It is fixed on the inner wall of the feed housing, and the housing is provided with a slag removal port for removing the slag on the filter plate, and the slag removal port and the slag removal port for cleaning the cloth sieve plate can be connected It is the same slag removal port, or the slag removal ports can be set separately.

Embodiment 3

[0035] Embodiment 3: The figure is not drawn, and the structure of Embodiment 3 is basically the same as that of Embodiment 1, and the similarities will not be repeated. The difference is that the discharge valve is installed at the lower end of the heat exchange unit through the discharge unit. At the outlet of the outlet, the discharge unit includes an inverted truncated cone-shaped discharge shell and a blanking plate, the upper end of the discharge shell is fixedly connected to the lower end of the heat exchange unit, and the discharge valve is set at the lower end , the blanking plate is provided with a blanking hole opposite to the discharge hole, so that the material flowing on the blanking plate can directly enter the discharge hole through the blanking hole, so as to prevent the accumulation of powder materials.

[0036] The cross-section of the blanking plate is a parabolic shape with an upward opening, or the shape of the blanking plate is a spherical shape with an u...

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Abstract

The invention relates to an aluminum oxide roaster vertical fluidized bed. The aluminum oxide roaster vertical fluidized bed comprises a support, a heat exchange unit and a control system, wherein the heat exchange unit and the control system are arranged on the support. The heat exchange unit comprises at least one heat exchange module. Each heat exchange module is composed of heat exchangers which are arranged vertically in parallel, wherein heat exchange tubes of the adjacent heat exchangers are arranged vertically in a staggered mode. A feeding unit is arranged on the upper portion of the heat exchange unit, and a discharging valve is arranged on the lower portion of the heat exchange unit. The feeding unit is provided with a high-material-level sensor and a low-material-level sensor. The high-material-level sensor and the low-material-level sensor are electrically connected with the signal input end of a controller of the control system. The output end of the controller is connected with the discharging valve. Opening and closing of the discharging valve are controlled according to sampling results of the high-material-level sensor and the low-material-level sensor. According to the aluminum oxide roaster vertical fluidized bed, flowing heat transfer enhancement of powder flow can be achieved without external force, the overall structure design is reasonable and simple, the size is small, the occupied space is saved, manufacturing, transportation, installation and maintenance are facilitated, the cost is low, and implementation and popularization are easy.

Description

technical field [0001] The invention belongs to the field of alumina roasting, in particular to a vertical fluidized bed of an alumina roasting furnace and a powder flow cooling method. Background technique [0002] At present, in the production process of alumina, the roasting process is one of the processes that consume the most energy and cost the most. Currently used roasters mainly include gas suspension roasters and circulating fluidized roasters. After the alumina is cooled by the cyclone cooling system from the roaster, the temperature is above 250°C, so it cannot be directly sent to the packaging system. For the safety of equipment and personnel, the alumina cooled by the cyclone cooling system needs to be cooled again by the fluidized bed cooler. [0003] Existing fluidized beds for cooling powder materials such as alumina require a blower to push the powder forward, increasing energy consumption, and the heat exchanger can only water-cool the material particles ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B15/08F27B15/09F27B15/16F27D9/00
CPCF27B15/08F27B15/09F27B15/16F27D9/00F27M2001/012F27D2009/0091F27M2001/16Y02P20/10
Inventor 鲁玉弟
Owner 张金波
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