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Device for hydrothermal preparation of powder materials

A technology of powder materials and hydrothermal method, which is applied in chemical instruments and methods, chemical/physical/physical chemical processes of energy application, chemical/physical/physical chemical fixed reactors, etc., can solve the problem that microwave heating cannot be guaranteed uniformly The degree of radiation is not evenly distributed in the main space of the container, etc., so as to improve the quality of powder products, shorten the synthesis time, and improve the production efficiency.

Inactive Publication Date: 2017-07-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN201520170972 discloses a reactor that utilizes microwave heating to realize carbonization of biomass, CN201420531509 discloses a high-temperature microwave gasification device, CN20130754676 discloses a device for preparing diamond film by microwave plasma, and US9139909B2 discloses a microwave plasma reactor , these technologies limit the microwave reactor to a small size, which cannot guarantee the uniformity of microwave heating in large-scale devices
U.S. Patent US9156715B2 discloses a device for heating drinking water by ultraviolet radiation. The rotating inlet structure is used to make the radiation energy act on the incoming flow as fully and uniformly as possible, but there is no uniform distribution of radiation in the main space of the container.

Method used

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  • Device for hydrothermal preparation of powder materials
  • Device for hydrothermal preparation of powder materials
  • Device for hydrothermal preparation of powder materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] see figure 1 As shown, the device for preparing powder materials by the hydrothermal method of the present invention includes a tank-type stirred reactor composed of a top cover 4 and a kettle body 5, a circulation system and a microwave heating system, and the microwave heating system includes a microwave cavity, a microwave generator 15 And microwave power supply and control system 17. The top cover 4 and the kettle body 5 are connected by a flange 18. The top cover 4 is provided with a stirring motor 1, a gas discharge port 2 and a feed port 3. The stirring motor 1 is arranged in the middle of the top cover 4 and its bottom is connected with an extension Into the stirring paddle 7 in the kettle body 5, the outer wall of the middle and lower part of the kettle body 5 is provided with an insulating layer 6, the bottom of the kettle body 5 is connected with the inlet end of the circulation pump 10 through the first circulation pipeline 8, and the first circulation pipel...

Embodiment 2

[0037] see figure 2 As shown, on the basis of the device in Example 1, the microwave-heated inner tube 12 is set as three sections of tubes 121 arranged vertically and parallelly in series through metal pipes, and each section of tubes 121 is provided with an independent microwave-heated metal cavity 13. According to the needs of heating power, more sections of tubes can be set; the outer wall of the middle and lower part of the kettle body 5 is provided with an insulation layer 6, and the circulation pump 10 is replaced by a homogeneous pump 101, which can convert the The material of the block is evenly dispersed and then input into the subsequent microwave heating inner tube 12.

[0038] see image 3 As shown, the inlet end of the array tube 121 is provided with a helical member 19 , and the helical member 19 is 1 / 3 of the length of the array tube 121 .

[0039] Reaction material is with embodiment 1, and tank type stirred reactor is 1m 3 1. The length of the single-sect...

Embodiment 3

[0041] The device described in Example 2 was used to hydrothermally synthesize Y zeolite. The reactor size was 150 L. The length of the single-stage tubes 121 in the microwave cavity was 1.6 m, the inner diameter of the tubes 121 was 6 cm, and the maximum power of each single-stage microwave feeding was 5 kW. The reaction materials are water glass, aluminum sulfate, sodium metaaluminate and deionized water, according to the conventional formula and mixing sequence, the preparation composition is SiO 2 :Al 2 o 3 : Na 2 O: H 2 The molar ratio of O is 1:0.07:1.1:30 silica-alumina gel directing agent, and then the directing agent, silicon source, aluminum source and water are composed of SiO 2 : 0.1Al 2 o 3 : 0.9Na 2 O: 65H 2 The molar ratio of O is 1:0.1:0.9:65 for mixing and beating, turn on the homogeneous pump 101 to further mix evenly, turn on microwave heating, heat up to 100°C, cool down after constant temperature crystallization for 5 hours, and obtain the crystalli...

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Abstract

The invention relates to a device for hydrothermal preparation of powder materials. The device comprises a stirred tank reactor, a circulation system and a microwave heating system. The circulation system comprises a first circulation pipeline, a circulation pump and a second circulation pipeline in sequential connection, and tail ends of the first circulation pipeline and the second circulation pipeline are communicated with the bottom and the upper portion of a kettle body respectively. The stirred tank reactor, the first circulation pipeline or the second circulation pipeline is provided with a discharging port. The microwave heating system comprises a microwave cavity, a microwave generator and a microwave power supply and control system, and the microwave cavity consists of a microwave heating inner tube and a metal cavity. The device is capable of replacing a conventional hydrothermal synthesis kettle for preparation of powder materials such as zeolite, and zeolite crystallization time is shortened while production efficiency is improved.

Description

technical field [0001] The invention relates to chemical equipment, in particular to a device for preparing powder materials by hydrothermal method. Background technique [0002] Under the action of microwave field, the electric loss and magnetic loss mechanism inside the material make the energy of microwave electromagnetic field quickly transform into heat energy, and realize the rapid heating of the material. Its advantages such as rapidity, energy saving, pollution-free and easy process control have been fully reflected in the fields of food, medicine, wood and material processing; and its selective heating characteristics often lead to local high temperature distribution (hot spots) in multiphase reaction systems. The reaction is carried out under non-uniform temperature conditions, which not only leads to a substantial increase in reaction speed, product selectivity and yield, but also often produces some phenomena that are difficult to explain by traditional catalytic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/08B01J19/18
CPCB01J19/0013B01J19/0066B01J19/126B01J19/18B01J2219/00058B01J2219/00141B01J2219/1215
Inventor 周华群张兆前高飞李季万子岸于兴智董卫刚王辉王若欣杨明华庞新梅向兵王晓化李玮崔岩彭博施
Owner PETROCHINA CO LTD
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