Star shaped casing tube preheater for large-scale canalization dissolving out apparatus

A pipeline and preheater technology, applied in the direction of heat exchanger types, indirect heat exchangers, fixed tubular conduit components, etc., can solve the problems of low work efficiency, improve efficiency, improve uniformity, increase heat Effect of Exchange Surface Area

Inactive Publication Date: 2008-12-03
NORTHEASTERN UNIV ENG & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent application 200510200288.8 discloses a "full single casing preheating, heat preservation and dissolution technology". This invention uses a single casing to preheat the raw ore pulp, and the work efficiency is low, so this process is mainly suitable for small Alumina plant application

Method used

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  • Star shaped casing tube preheater for large-scale canalization dissolving out apparatus
  • Star shaped casing tube preheater for large-scale canalization dissolving out apparatus
  • Star shaped casing tube preheater for large-scale canalization dissolving out apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 Top frame fixed star casing preheater

[0018] like figure 1 and 2 shown. Take a steel pipe of φ530mm as the outer casing 1 and press the two ends of the steel pipe figure 2 In the shown scheme, a bracket vertical tube 7 is welded on first, and then a bracket horizontal tube 9 is welded on both sides of the vertical tube to divide the inner space of the outer tube into three large and small parts, and then in the three large spaces T-shaped top frame 8 is welded on the inner wall of the outer tube at the position opposite to the joint of the support vertical tube and the horizontal tube. The space between the top frame and the vertical and horizontal pipes can accommodate the inner pipe 2 to pass through without allowing it to roll or slip. The inner pipe is a steel pipe of φ159×12mm. In the assembled type, three inner tubes are first inserted into the bracket at one end of the outer tube and passed out from the bracket at the other end, and then the ...

Embodiment 2

[0020] Embodiment 2 Small short tube fixed star casing preheater

[0021] like figure 1 and 3 shown. Take the steel pipe of φ610 as the outer casing 1 and press the two ends of the steel pipe figure 2 In the shown scheme, a bracket vertical tube 7 is welded on first, and then a bracket horizontal tube 9 is welded on both sides of the vertical tube to divide the inner space of the outer tube into three large and small parts, and then in the three large spaces Weld some small short pipes 10 for positioning the inner pipe on the corresponding positions on the vertical and horizontal pipes of the support. Do not allow it to roll or slip. The inner pipe is a steel pipe of φ219. In the assembled type, three inner tubes are first inserted into the bracket at one end of the outer tube and passed out from the bracket at the other end, and then the inner tube with the outer tube is welded in series. Since the inner pipe is longer than the outer pipe, the inner pipe can be welded ...

Embodiment 3

[0023] Embodiment 3 Small short tube and top frame combined fixed star-shaped casing preheater

[0024] like figure 1 and 4 shown. Take the steel pipe of φ610 as the outer casing 1 and press the two ends of the steel pipe figure 2 Shown scheme upper and lower each welds two bracket horizontal tubes 9, the distance between the two horizontal tubes can accommodate the inner tube to pass through, and then welds a short vertical tube 11 at the central part of the two horizontal tubes, and uses the short vertical tube Divide the space between the two support horizontal tubes into two, and then respectively weld a T-shaped top frame 8 on the inner wall of the outer tube on both sides of the short vertical tube, and in the upper space of the upper horizontal tube, use a horizontal The midpoint of the tube is the origin, and a T-shaped top frame 8 is welded on the corresponding position of the outer tube inner wall that is 120° before and after this point. The tube 2 passes freel...

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Abstract

The invention relates to a starlike sleeve preheater for a large-scale channelization dissolution device. The starlike sleeve preheater comprises an outer sleeve and an inner sleeve. The starlike sleeve preheater is characterized in that: (1) the outer sleeve is provided with more than three inner sleeves in parallel along the axis direction; and (2) the outer sleeve is provided with inner sleeve brackets at intervals. The corresponding positions of the three inner sleeves are positioned in the three vertex positions of a regular triangle and fixed by the inner sleeve brackets. The invention also provides three different design proposals of the inner sleeve brackets. The starlike sleeve preheater is adopted and can not slow the flow speed of ore slurry, can also increase an area of a heat exchange surface and improve the uniformity of temperature in ore slurry flow under the condition of increasing the flow of the ore slurry. In a word, the invention greatly improves the efficiency of channel dissolution and has great popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of high-pressure dissolution equipment for alumina production, and provides a star-shaped casing preheater for large-scale pipeline dissolution equipment. Background technique [0002] Pipeline stripping technology in the alumina production process, that is, the alumina in bauxite is stripped out with alkaline solution in a large pipeline. It adopts a double-layer pipe, that is, a single casing. The inner pipe transports the pulp, and the outer pipe passes through hot steam. The heat of the steam is transferred to the pulp through the pipe wall, so that the pulp reaches the temperature required for dissolution. The dissolution process is the core process in the alumina production process. The key to the development of large-scale and super-large alumina plants is how to make the dissolution equipment large-scale and efficient. [0003] Chinese patent application 200510200288.8 discloses a "full single casin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02F28D7/14
Inventor 王彧杨青辰刘文全
Owner NORTHEASTERN UNIV ENG & RES INST CO LTD
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