Fluidized bed gas distributor and gasifier

A gas distributor and fluidized bed technology, applied in the direction of granular/powdered fuel gasification, etc., can solve the problems of easy loss of fluidization of large particles, reduced gasification efficiency of gasifier, uneven distribution of flow field in the furnace, etc. Achieve the effect of reducing processing difficulty and operation and maintenance costs, reducing design operation and maintenance costs, and reducing the risk of slagging

Active Publication Date: 2015-06-03
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the large velocity change gradient in the conical distribution plate area, the flow field in the furnace is unevenly distributed, and large particles are easily defluidized to form a flow dead zone; the connection between the conical distribution plate and the gasifier cylinder is also limited due to fluidization It is easy to form a flow dead zone, such as Figure 5 shown; in addition, because the conventional distribution plate usually adopts a uniform distribution of pore size, it does not take into account the change of the pressure difference of the distribution plate

Method used

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  • Fluidized bed gas distributor and gasifier
  • Fluidized bed gas distributor and gasifier
  • Fluidized bed gas distributor and gasifier

Examples

Experimental program
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Example Embodiment

[0032] Example 1

[0033] A fluidized bed gas distributor, such as figure 1 As shown, it includes a fluidization zone, the fluidization zone at least includes a first fluidization zone and a second fluidization zone, the lower end of the first fluidization zone distribution plate 1 is connected to the upper end of the second fluidization zone distribution plate 2, The included angle between the distribution plate 1 of the first fluidized area and the distribution plate 2 of the second fluidized area is at an obtuse angle.

[0034] According to the requirements of different fluidized beds and the properties of raw materials, at least two fluidized zone distribution plates are made to form multiple fluidized zones. Multiple fluidization zone distribution plates can be connected in sequence, or can be connected in other ways according to different requirements. In order to make the material on the first fluidization zone flow into the second fluidization zone smoothly, the ang...

Example Embodiment

[0053] Example 2

[0054] A gasifier containing a fluidized bed gas distributor, such as figure 2 As shown, the fluidized bed gas distributor is basically the same as that of Example 1, except that:

[0055] In this embodiment, the fluidized bed gas distributor has two fluidization zones. like image 3 As shown, the vertical height ratio of the distribution plate 1 in the first fluidized zone and the distribution plate 2 in the second fluidized zone is 1; 0.5%; the swirl holes 5 are placed on the middle annular surface of the distribution plate 1 in the first fluidization zone. like figure 1 As shown, the second fluidization zone distribution plate 2 adopts the form of a folded plate, the angle b between the second fluidization zone distribution plate 2 and the center line of the distributor is 45 degrees, and the small holes of the second fluidization zone distribution plate 2 are The holes are arranged in a combination of vertical and horizontal holes. On the second f...

Example Embodiment

[0069] Example 3

[0070] A gasifier containing a fluidized bed gas distributor, such as Figure 4 As shown, the fluidized bed gas distributor is basically the same as that of Example 2, except that:

[0071] In this embodiment, the vertical height ratio between the distribution plate 1 of the first fluidized zone and the second fluidized zone is 0.2, the distribution plate 1 of the first fluidized zone adopts 6 rotating holes, the diameter of the rotating holes 5 is 4 mm, and the opening rate is 0.6% .

[0072] like Figure 4 As shown, the distribution plate 2 of the second fluidization zone adopts the form of two folded plates, the angle bI between the first folded plate 8 of the second fluidized zone and the center line of the distributor is 31 degrees, and the second folded plate 9 is 31 degrees with the center line of the distributor. The angle bII of the center line of the distributor is 52 degrees, and the small holes of the first folded plate 8 and the second folded...

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Abstract

The invention relates to the technical field of chemical equipment and particularly to a fluidized bed gas distributor and a gasifier. The distributor comprises at least two fluidized zones. By means of carrying out divisional design on distribution plates in the fluidized zones, different fluidized distribution plates are designed specific to the properties of materials at different positions in a fluidized bed, and the aim of optimizing the distribution of a flow field is achieved through controlling the angles of each fluidized zone and the tapping characteristics of each zone. The fluidized bed gas distributor can be applied to the gasifier, improves the gasification efficiency, and reduces the operation and maintenance costs of the gasifier.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a fluidized bed gas distributor and a gasification furnace. Background technique [0002] Fluidized bed coal gasification technology is one of the earliest industrialized gasification processes. The process is that the raw coal maintains continuous boiling and suspension state movement under the action of bottom-up gasification agent, and rapidly mixes and exchanges heat. gasification technology. [0003] As the main component of the fluidized bed equipment, the gasification agent distribution device (generally called "distribution plate" or "distributor") plays an important role in evenly distributing gas and supporting solid particles, and its shape and structure greatly affect the equipment. Production operation performance such as heat transfer and mass transfer. [0004] The gasification agent distribution plates used in industrial-scale fluidized beds are mostl...

Claims

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Application Information

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IPC IPC(8): C10J3/56
CPCC10J3/56
Inventor 祖静茹李克忠湛月平
Owner ENN SCI & TECH DEV
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