Six-point equilibrum atomization device

Abstract

The invention discloses a six-point equilibrum atomization device which comprises a material spraying frame and nozzles, wherein the material spraying frame is provided with a gas inlet cavity, a diversion hole, an angle type injection surface and a gas inlet which is communicated with the gas inlet cavity, and six injection holes are uniformly distributed in the circumferential direction of the injection surface; and the nozzles are assembled on the injection holes of the material spraying frame, each nozzle is communicated with the gas inlet cavity and points to an atomization point, and the atomization point is arranged on an axial line of the diversion hole. Proved by experiments, the atomization efficiency of the six-point equilibrum atomization device is high, an ordinary free atomization device obtains about 44.2 percent of znic powder with the particle size of 150 microns under the pressure of 1.0MPa, while the invention can obtain the znic powder with the particle size of 150microns exceeding 80 percent under the pressure of 0.8Mpa and has the advantages of good controllability and difficult blockage. The invention can reach better effect through less pressure, thereby saving the energy and also enhancing the atomization efficiency.

Description

technical field [0001] The invention relates to the technical field of atomization devices, more specifically, to a six-point balanced atomization device. Background technique [0002] With the continuous improvement of the battery technology level, the performance requirements of mercury-free batteries in high current and storage time are continuously improved. After continuous experiments and repeated demonstrations, it is found that when the zinc powder of mercury-free batteries is When the average particle size reaches 150±20μm, and the particles are in the range of 20-300μm, the zinc powder has excellent high-power discharge performance in battery applications, and the gas evolution is small, and the performance is stable. The scanning electron microscope test found that the zinc powder particle shape has Irregularity of the bone type, at this time the zinc powder has good contact surface properties. The zinc powder that meets the above conditions will become a new gen...

AI Technical Summary

Problems solved by technology

However, the current large-scale production method of mercury-free zinc powder cannot achieve the average particle size of zinc powder under the premise of irregular particles to 150±20μm

[0003] At present, the mainstream mercury-free battery zinc powder and its preparation method in China is to control the average particle size of mercury-free zinc powder to 230±20μm or thicker. This kind of zinc powder is not conducive to reducing the internal resistance of the battery because of its relatively coarse particles. It is not conducive to the product transfer during the electrochemical reaction process, the specific surface area of ​​the contact between particles is small, and the activity is relatively low, which has become a bottleneck for improving high-power electrical performance

There are also ways to prepare fine zinc powder on the market, but the particle shape is too round spherical zinc powder or too fine. In the application of the battery, the contact surface of the spherical zinc powder is small, which seriously limits the drop performance of the battery.

Zinc powder that is too fine is prone to self-corrosion in the application of the battery, and the battery gas evolution is too large, which may cause leakage or explosion

[0004] Chinese patents with patent application numbers 02251367.1 and 00132203.6 respectively disclose "a nozzle for producing fine zinc powder by gas atomization method" and "high specific energy amalgam-free zinc powder for alkaline batteries and its preparation method and its used device", in which the first type of nozzle can achieve 95% of the zinc powder above 200 mesh (75μm), and the second type of zinc powder above 200 mesh (75μm) can reach 30-40%; but due to different processes, the above two Zinc powder produced by this method is mainly spherical in shape. Spherical zinc powder is not suitable for battery application because it severely limits the drop performance of the battery. The high proportion of fine zinc powder is likely to cause self-corrosion of the battery and partial gas evolution. Therefore, in the application of this kind of zinc powder in the battery, there is a big gap in various electrical performance indicators compared with high-end batteries. Among them, in the patent 03151176.7, the gas evolution index of the battery in the patent 00132203.6 has not reached the mercury-containing zinc powder. ask for a comparison

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