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Microwave reaction kettle with kneader

A microwave reaction, microwave technology, applied in chemical instruments and methods, chemical/physical/physical-chemical processes, chemical/physical/physical-chemical processes of applied energy, etc. problems, to achieve the effect of improving the reaction rate and product quality, improving heating efficiency, and good temperature control function

Pending Publication Date: 2020-07-03
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the existing technology: 1. The existing microwave oven has a single function and only has a heating function. It is not suitable for reactions that generate high-viscosity, elastic-plastic materials and require kneading and stirring during the reaction process, and cannot meet the requirements of certain chemical applications. Real-time stirring and kneading as needed
2. The existing microwave ovens cannot control the temperature of the reactants according to the requirements of the reaction conditions, so most of them produce solid polymerization reactions, sacrificing the advantages of microwaves, and use heat transfer for heating. This heating efficiency is not high, and the heating is not efficient. uniform

Method used

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  • Microwave reaction kettle with kneader
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Use the above-mentioned equipment for the synthesis of agricultural ammonium polyphosphate water-soluble fertilizer, use urea and phosphoric acid as raw materials to synthesize ammonium polyphosphate, set the microwave power to 500w, and set the reaction temperature to 170°C, and the agricultural polyphosphoric acid can be synthesized in only 8 minutes under microwave radiation heating Ammonium water-soluble fertilizer products; the microwave power is 1000W, and the reaction temperature is set at 160°C, which can synthesize agricultural ammonium polyphosphate water-soluble fertilizer products in 6 minutes. However, conventional heating is used to synthesize agricultural ammonium polyphosphate products, which usually requires about 3 hours of heating reaction.

Embodiment 2

[0033] Use the above-mentioned equipment for the synthesis of ammonium polyphosphate flame retardant, synthesize low-water-soluble ammonium polyphosphate with phosphoric acid and melamine as raw materials, microwave power 600W, first add phosphoric acid, set the temperature at 300°C, microwave radiation heating for 30 minutes, and the temperature drops to 180°C Add melamine after ℃, set the reaction temperature to 260℃, feed dry ammonia during the reaction, heat, stir and knead under microwave radiation for 20 minutes, stop heating, and cool to obtain low water-soluble ammonium polyphosphate flame retardant products. However, it takes about 4 hours to synthesize low water-soluble ammonium polyphosphate by conventional heating.

Embodiment 3

[0035] The above equipment is used for the synthesis of ammonium polyphosphate flame retardant, ammonium polyphosphate flame retardant is synthesized with ammonium dihydrogen phosphate and melamine as raw materials, the microwave power is 500W, the reaction temperature is set at 250°C, and the microwave radiation is carried out without ammonia gas Heating, stirring and kneading under low temperature for 30 minutes, then stop heating and cooling, and cool to obtain a low water-soluble ammonium polyphosphate flame retardant product with balanced quality. During the reaction process, low water-soluble ammonium polyphosphate can also be synthesized without feeding ammonia gas. Conventional heating is difficult to solidify without feeding ammonia, and there are temperature gradients and bottle wall effects during the reaction process, which makes the quality of the synthesized products different.

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Abstract

The invention discloses a microwave reaction kettle with a kneader. The microwave reaction kettle consists of two parts, one part is a material kneading device, and the other part is a microwave radiation device. The material kneading device is also used as a microwave reaction cavity; a plurality of kneading cutters are arranged in the reaction cavity, the kneading cutters are located at the bottom of the reaction cavity, the bottom of the whole reaction cavity is of a W double-arc structure, the radian of the reaction cavity is attached to the movement track of the kneading cutters, sufficient kneading of materials can be guaranteed, the kneading cutters are connected through a cutter transmission shaft, and transmission power is provided by a motor. A microwave radiation device is located on a top cover of the reaction cavity, a microwave radiator is installed on the center of the top cover, and microwave energy is radiated outwards in the form of a monopole antenna. An infrared temperature measuring device is arranged on the top cover, so that the reaction temperature can be measured in real time. The problem that materials cannot be kneaded in real time in the microwave heating process is solved, the operation is easy, and the reaction temperature can be controlled according to the reaction temperature requirement.

Description

technical field [0001] The invention relates to chemical equipment, in particular to a microwave reaction kettle. Background technique [0002] With the continuous development of science and technology, microwave energy, as a new type of high-efficiency clean energy, has been used more and more in various fields such as food processing, chemical industry, and medicine. Compared with traditional heating methods, microwave heating has the characteristics of high efficiency and energy saving, selective heating, clean and pollution-free, etc. Nowadays, microwave heating has been widely used in many fields. Microwave radiation a condensation reaction of naphthyl formaldehyde and diethyl malonate, the use of microwaves shortens the traditional heating time to the original 3‰, and reduces energy consumption by 95%. Microwave radiation catalyzes the synthesis of ammonium polyphosphate, which not only improves the synthesis efficiency, but also greatly improves the quality of the p...

Claims

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Application Information

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IPC IPC(8): B01J19/12
CPCB01J19/126B01J2219/00141
Inventor 解田王凤霞晏波杨丰铭肖玮
Owner WENGFU (GRP) CO LTD
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