Hydrophobic white carbon production fluidized bed reactor capable of recycling materials

Abstract

The invention relates to the field of fluidized beds, and discloses a hydrophobic white carbon production fluidized bed reactor capable of recycling materials. The hydrophobic white carbon productionfluidized bed reactor capable of recycling materials comprises a bed body, a gas distribution chamber is arranged at the bottom of the bed body, and an upper seal head is arranged at the top of the bed body; a plurality of groups of heat exchange tube assemblies are mounted in the bed body, each group of heat exchange tube assembly at least comprises two U-shaped heat exchange tube groups, and theU-shaped heat exchange tube groups share the same heat conduction oil inlet and the same heat conduction oil outlet; and each U-shaped heat exchange tube group is formed by connecting at least threeU-shaped heat exchange tubes in series. Compared with the prior art, the hydrophobic white carbon black production fluidized bed reactor capable of recycling the materials is large in number of heat exchange tubes, high in heat exchange efficiency, small in model selection limitation on a heat conduction oil pump and high in heat conduction efficiency; especially for solid materials with light weight, the solid materials and gas materials can be fully and uniformly mixed, the reaction is uniform and stable, the content of effective components in the reaction product is high, and the comprehensive production cost is low.

Description

technical field [0001] The invention relates to the field of fluidized beds, in particular to a fluidized bed reactor for producing hydrophobic white carbon black with recyclable materials. Background technique [0002] At present, the fluidized bed reactor used to prepare hydrophobic silica by using hydrophilic silica, due to the irrationality in the results, makes the active ingredients contained in the reaction product low, resulting in high production costs, affect economic benefits. The key parts of the fluidized bed are the gas distributor at the bottom of the bed and the heat exchange device inside the bed. The former affects the fluidization quality of the raw material gas, and the latter will affect the heat exchange efficiency of the reactor. [0003] Most of the gas distributors are now designed as sieve plates, spherical crowns and similar structures. For the lighter silica, this type of structure is easy to blow the silica, resulting in the gap between the gas ...

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Problems solved by technology

[0002] At present, the fluidized bed reactor used to prepare hydrophobic silica by using hydrophilic silica, due to the irrationality in the results, makes the active ingredients contained in the reaction product low, resulting in high production costs, Affect economic benefits

The key parts of the fluidized bed are the gas distributor at the bottom of the bed and the heat exchange device inside the bed. The former affects the fluidization quality of the raw material gas, and the latter will affect the heat exchange efficiency of the reactor.

[0003] Most of the gas distributors are now designed as sieve plates, spherical crowns and similar structures. For the lighter silica, this type of structure is easy to blow the silica, resulting in the gap between the gas and the silica. The contact between them is uneven, the reaction is unstable, the active ingredients in the reaction product are low, and the production cost is high

[0004] And another key component—the heat exchange device installed inside the bed body, most of them are designed as U-shaped tube structure, or finger-shaped tube structure with inner and outer tubes. The disadvantages of the U-shaped tube structure are: first, adjacent heat exchange The tubes are connected by U-shaped elbows or short horizontal tubes at the upper and lower ends, which affects the fluidization channel of the material and is not conducive to fluidization. Moreover, when this type of heat exchange tube is connected to the outer tube, there are often many interfaces. , causing inconvenience to installation and maintenance

Due to the above reasons, some fluidized bed reactors now adopt a finger-shaped tube structure with inner and outer sleeves. Although this structure avoids the disadvantages of the U-shaped tube structure, it is difficult for the layout of the heat exchange tubes and the impact on the inlet and outlet tubes. There are still deficiencies in the distribution of the heat transfer oil of the heat pipe

For example, some larger fluidized beds use heat transfer oil distribution boxes to distribute heat transfer oil. This distribution box reduces the number of joints between internal heat exchange tubes and outer tubes, which facilitates installation and maintenance. When oiling, the heat transfer oil entering the oil tank is distributed to each heat exchange tube at the same time and then discharged at the same time. When the number of heat exchange tubes is large, it is necessary to use a heat transfer oil pump with a larger flow rate to supply oil. Inconvenience, moreover, the time for the heat transfer oil pumped in each cycle to flow through the heat exchange tube is too short, and the heat taken away is limited, resulting in low heat transfer efficiency and high power consumption, which affects economic benefits

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