Method for improving drying efficiency of ammonium bifluoride

Abstract

The invention provides a method for improving the drying efficiency of ammonium bifluoride, relates to the technical field of drying of ammonium bifluoride, and aims to solve the problems that an existing drying method of ammonium bifluoride is high in equipment maintenance cost, high in energy consumption and easy to generate waste gas and waste water in the operation process. The method comprises the following steps: a, starting a transmission motor, a feeding auger and a feeding auger of a drying section and a cooling section of the rotary kiln, b, then starting an induced draft fan, an air feeder and a dust remover pulse, monitoring the temperature rise process of the rotary kiln, starting a fluidized bed vibration motor, a discharging screw and a feeding screw, starting a dust remover induced draft fan, the air feeder and the dust remover pulse, and monitoring the temperature rise process of the fluidized bed, and c, starting the fluidized bed vibration motor when the temperature of an inlet of the fluidized bed is 100-120 DEG C; when the inlet temperature is 60-70 DEG C, the outlet temperature is 60-70 DEG C, the inlet temperature of the rotary kiln is 60-70 DEG C, and the outlet temperature is 40-50 DEG C, uniformly feeding the materials into the hopper, and d, after feeding is finished, starting the packaging machine and the discharging auger to obtain an ammonium bifluoride finished product.

Description

Technical Field

[0001] The invention relates to the technical field of ammonium bifluoride drying, and in particular to a method for improving the drying efficiency of ammonium bifluoride. Background Art

[0002] Ammonium bifluoride is an important inorganic fluoride with the appearance of white or colorless transparent rhombic crystals. It is corrosive, easily deliquescent, easily soluble in water, slightly soluble in alcohol, and decomposes in hot water. Ammonium bifluoride is mainly used as an etchant for carved glass, disinfectant, preservative, analytical reagent, organic synthetic fluorinating agent, surface treatment agent for silicon steel plates, oxidant for manufacturing ceramics and aluminum-magnesium alloys, electroplating solution, and reagent for extracting rare elements.

[0003] At present, the drying methods of ammonium bifluoride mainly include airflow drying and box drying. However, these traditional drying methods have obvious limitations in practical applications. For example, although airflow drying can use hot air to quickly remove moisture from the material, its design is relatively complex, which increases the difficulty and cost of equipment maintenance; although box drying has higher temperature control accuracy and better drying uniformity, it has low efficiency and high energy consumption. In addition, the wastewater, waste gas, etc. generated by the above methods during the drying process will pollute the environment if not handled properly. The existing drying methods of ammonium bifluoride have the problems of high equipment maintenance cost, high energy consumption, and easy generation of waste gas and wastewater during operation. Therefore, it is particularly important to design a method to improve the drying efficiency of ammonium bifluoride to solve the above technical problems. Summary of the invention

[0004] The invention provides a method for improving the drying efficiency of ammonium bifluoride, which is proposed to solve the problems of high equipment maintenance cost, high energy consumption and easy generation of waste gas and waste water in the operation process of the traditional ammonium bifluoride drying method.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a method for improving the drying efficiency of ammonium bifluoride, comprising the following steps: a. starting the transmission motors of the drying section and the cooling section of the rotary kiln, and the loading and feeding augers; b. then starting the induced draft fan, the blower, and the pulse of the dust collector to monitor the heating process of the rotary kiln; starting the fluidized bed vibration motor, the discharging screw, and the feeding screw; starting the induced draft fan, the blower, and the pulse of the dust collector to monitor the heating process of the fluidized bed; c. when the inlet temperature of the fluidized bed is 100-120°C, the outlet temperature is 60-70°C, the inlet temperature of the rotary kiln is 60-70°C, and the outlet temperature is 40-50°C, the material is evenly added to the hopper; d. after the feeding is completed, the packaging machine and the discharging augers are started to obtain the finished ammonium bifluoride product.

[0006] Preferably, in step c, the mesh diameter of the feed distributor at the fluidized bed inlet is 2 cm.

[0007] Compared with the prior art, the advantages and positive effects of the present invention are: 1. The present invention adds a feed distributor at the inlet of the vibrating fluidized bed, which fully guarantees the drying quality, can not only reduce the double drying in the later stage, improve the production efficiency, but also significantly reduce the production cost. The method for improving the drying efficiency of ammonium bifluoride provided by the present invention not only significantly reduces the energy consumption, but also is simple to operate, easy to control, green and environmentally friendly, suitable for large-scale production, and solves the problems of high equipment maintenance cost, high energy consumption and easy generation of waste gas and wastewater in the operation process of the traditional ammonium bifluoride drying method.

[0008] 2. The method for improving the drying efficiency of ammonium bifluoride provided by the present invention achieves the goal of producing ammonium bifluoride with high efficiency, low cost and high quality. DETAILED DESCRIPTION

[0009] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the attached table and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0010] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0011] Turn on the rotary kiln drying section and cooling section transmission motor, loading and feeding auger, turn on the induced draft fan, blower, and dust collector pulse, and monitor the heating process of the rotary kiln; turn on the fluidized bed vibration motor, discharging screw, and feeding screw, turn on the dust collector induced draft fan, blower, and dust collector pulse, and monitor the heating process of the fluidized bed; when the fluidized bed inlet temperature is 108°C, the outlet temperature is 66°C, the rotary kiln inlet temperature is 64°C, and the outlet temperature is 45°C, add materials to the hopper evenly; after feeding, turn on the packaging machine and the discharging auger to complete the drying process of ammonium bifluoride. The moisture content of the ammonium bifluoride finished product obtained by the processing method adopted in the above embodiment is 0.02, the drying efficiency is 96%, and the steam consumption is 1.2m³.

[0012] The method is basically the same as Example 1, except that: the feed distributor is not installed at the inlet of the fluidized bed, and the moisture content of the finished ammonium bifluoride obtained by the processing method adopted in this embodiment is 0.78, the drying efficiency is 89%, and the steam consumption is 1.6m³.

[0013] It is basically the same as Example 1, except that: the mesh diameter of the feed distributor at the inlet of the fluidized bed is 3 cm, the moisture content of the finished ammonium bifluoride obtained by the processing method adopted in this embodiment is 0.55, the drying efficiency is 90%, and the steam consumption is 1.5 m³.

[0014] It is basically the same as Example 1, except that: the mesh diameter of the feed distributor at the inlet of the fluidized bed is 1 cm: the moisture content of the finished ammonium bifluoride obtained by the processing method adopted in this embodiment is 0.38, the drying efficiency is 92%, and the steam consumption is 1.8m³.

[0015] The method is basically the same as Example 1, except that the inlet temperature of the fluidized bed is adjusted to 80-100°C, the moisture content of the ammonium bifluoride product obtained by the processing method adopted in this embodiment is 0.67, the drying efficiency is 94%, and the steam consumption is 1.4m³.

[0016] The indicators of the above embodiments are compared as follows: Conditions changed relative to Example 1 Moisture Drying efficiency (%) Steam consumption (m3) Example 1 —— 0.02 96 1.2 Example 2 Without feed distributor 0.78 89 1.6 Example 3 The mesh diameter of the feed distributor is 3 cm 0.55 90 1.5 Example 4 The mesh diameter of the feed distributor is 1 cm 0.38 92 1.8 Example 5 The fluidized bed inlet temperature is 80-100℃ 0.67 94 1.4 In summary, by adopting the method for improving the drying efficiency of ammonium bifluoride provided by the present invention, the moisture content of the finished ammonium bifluoride product is ≤0.03% after only one drying. A feed distributor is installed at the inlet of the vibrating fluidized bed to fully ensure the drying quality, which can not only reduce the double drying in the later stage, improve the production efficiency, but also significantly reduce the production cost. By optimizing the process flow, the present invention not only improves the product quality, but also achieves cost savings and environmental protection.

Claims

1. A method for improving the drying efficiency of ammonium bifluoride, comprising the following steps, characterized in that: a. Turn on the driving motors of the drying section and cooling section of the rotary kiln, as well as the loading and feeding augers. b. Then turn on the induced draft fan, blower, and dust collector pulses to monitor the heating process of the rotary kiln. Turn on the fluidized bed vibration motor, discharging screw, and feeding screw. Turn on the dust collector induced draft fan, blower, and dust collector pulses to monitor the heating process of the fluidized bed. c. When the inlet temperature of the fluidized bed is 100-120°C, the outlet temperature is 60-70°C, the inlet temperature of the rotary kiln is 60-70°C, and the outlet temperature is 40-50°C, add materials evenly to the hopper. d. After the feeding is completed, turn on the packaging machine and the discharging augers to obtain the finished ammonium bifluoride product.

2. The method for improving the drying efficiency of ammonium bifluoride according to claim 1, wherein: In the step c, the mesh diameter of the feed distributor at the fluidized bed inlet is 2 cm.