Anti-accumulation drying device in manganese carbonate production

Abstract

The utility model belongs to the production technology field of manganese carbonate, disclose a kind of anti-accumulation drying device in manganese carbonate production, including screw feeder, the outlet of screw feeder is sequentially communicated to rotary flash drying machine, fluidized bed dryer and cyclone separator by pipeline and valve, the air outlet pipe of cyclone separator is communicated to the air inlet of pulse bag filter, the air outlet of pulse bag filter is communicated to the air inlet of induced draft fan by pipeline;The outlet of cyclone separator and pulse bag filter is all communicated to product storage tank;Rotary flash drying machine and fluidized bed dryer are all communicated with nitrogen circulation system.The utility model solves the problem of accumulation of material in drying process, can uniformly dry material, improve product quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of manganese carbonate production technology, specifically to a drying device for preventing accumulation in manganese carbonate production. Background Technology

[0002] Manganese carbonate is a raw material for manufacturing soft magnetic ferrites for telecommunications equipment, synthesizing manganese dioxide, and producing other manganese salts. It can also be used as a desulfurization catalyst, as a pigment in porcelain glazes, coatings, and varnishes, as a fertilizer and feed additive, in pharmaceuticals, as a welding electrode consumable, and as a raw material for the production of electrolytic manganese metal.

[0003] Because manganese carbonate powder has a high surface energy, strong van der Waals forces exist between particles. When the moisture content exceeds 8%, the powder's flowability index drops sharply from free flow to viscous flow, forming agglomerates similar to "wet sand." These agglomerates accumulate in existing belt dryers. Furthermore, in drying environments above 60°C, manganese carbonate undergoes a slow oxidation reaction to produce manganese trioxide, which has even stronger water absorption, forming a cemented layer on the material surface. When the oxidation degree exceeds 5%, the angle of repose of the powder increases from 32° to 58°, completely losing its flowability, also leading to accumulation in the belt dryer. These accumulated materials cause frequent shutdowns for cleaning, severely impacting not only normal production but also product quality. Therefore, it is necessary to overcome these problems as soon as possible. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a drying device for preventing accumulation in the production of manganese carbonate, which overcomes the defects of the prior art, solves the problem of material accumulation during the drying process, and can dry the material evenly, thus ensuring production efficiency and product quality.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A drying device for preventing accumulation in manganese carbonate production includes a screw feeder. The outlet of the screw feeder is connected in sequence to a rotary flash dryer, a fluidized bed dryer, and a cyclone separator via pipes and valves. The outlet of the cyclone separator is connected to the inlet of a pulse bag filter. The outlet of the pulse bag filter is connected to the inlet of an induced draft fan via a pipe. The outlets of both the cyclone separator and the pulse bag filter are connected to a product storage tank. Both the rotary flash dryer and the fluidized bed dryer are connected to a nitrogen circulation system.

[0007] Preferably, the screw feeder is an LSY200 screw feeder, provided by Henan Chaoying Machinery Manufacturing Co., Ltd.

[0008] Preferably, the rotary flash dryer is an XSG-16 rotary flash dryer, provided by Changzhou Haomai Drying Engineering Co., Ltd.

[0009] Preferably, the fluidized bed dryer is an XF0.5X7 fluidized bed dryer, provided by Changzhou Fengneng Drying Engineering Technology Co., Ltd.

[0010] Preferably, a first nitrogen heater is installed on the pipe between the outlet of the nitrogen circulation system and the inlet of the rotary flash dryer; a second nitrogen heater is installed on the pipe between the outlet of the nitrogen circulation system and the inlet of the fluidized bed dryer. Both the first and second nitrogen heaters are HCNLX nitrogen heaters, manufactured by Shanghai Huachao Electric Technology Co., Ltd.

[0011] Preferably, the nitrogen circulation system is a DGM-100 nitrogen circulation system, provided by Nantong Datong Baofu Blower Co., Ltd.

[0012] Preferably, the cyclone separator is an FX840 cyclone separator, provided by Weihai Haiwang Cyclone Separator Co., Ltd.

[0013] Preferably, the pulse bag filter is an LCMD-48 pulse bag filter, provided by Hebei Qiaoda Environmental Protection Technology Co., Ltd.

[0014] Preferably, the exhaust outlet of the induced draft fan is connected to the exhaust gas treatment system via a pipeline.

[0015] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] This invention improves drying efficiency by 60% and reduces energy consumption by 30% compared to traditional single-stage drying through a two-stage drying process. The nitrogen circulation system controls the oxidation level to below 0.3%, and the product purity is ≥99.5%. The two-stage separation can improve the product yield. In summary, this invention solves the problem of material accumulation during the drying process through the above settings, enabling uniform drying of materials and improving product quality and production efficiency. Attached Figure Description

[0017] Figure 1 This is a flowchart of an embodiment of the present utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1As shown, a manganese carbonate production anti-accumulation drying device includes a screw feeder. The discharge port of the screw feeder is connected in sequence to a rotary flash dryer, a fluidized bed dryer, and a cyclone separator via pipes and valves. The air outlet of the cyclone separator is connected to the air inlet of a pulse bag filter. The air outlet of the pulse bag filter is connected to the air inlet of an induced draft fan via a pipe. The discharge ports of both the cyclone separator and the pulse bag filter are connected to a product storage tank. Both the rotary flash dryer and the fluidized bed dryer are connected to a nitrogen circulation system.

[0020] In practical applications, wet material with a moisture content of 20% is fed into a rotary flash dryer via a screw feeder (30 rpm). It comes into contact with 150°C hot nitrogen gas (obtained through a nitrogen circulation system and a first nitrogen heater installed between the dryer and the dryer), completing initial drying within 20 seconds, reducing the moisture content to 5-8%. The initially dried hot material is then transferred to a fluidized bed dryer, where it is further dried to a moisture content ≤1% under the action of 120°C hot nitrogen gas (obtained through a nitrogen circulation system and a second nitrogen heater installed between the dryer and the dryer). During the drying process, the frequency of the vibrating motor (0-50 rpm) is adjusted. The material residence time is controlled by a cyclone separator (with a separation efficiency of 95%). The dried material is separated by a cyclone separator, and the product falls into the product storage tank through the outlet. The cyclone is then transported to a pulse bag filter for further separation through the outlet pipe. Some of the product carried in by the cyclone is separated and falls into the product storage tank through the outlet. Then, it undergoes post-processing (entering the cooling silo and being packaged and stored by an automatic packaging machine). The outlet of the pulse bag filter is connected to an induced draft fan through a pipeline. The induced draft fan generates negative pressure on the previous process and simultaneously transports the exhaust gas to the exhaust gas treatment system for treatment before being discharged.

[0021] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A drying device for preventing accumulation in manganese carbonate production, characterized in that: The system includes a screw feeder, whose outlet is connected sequentially to a rotary flash dryer, a fluidized bed dryer, and a cyclone separator via pipes and valves. The outlet of the cyclone separator is connected to the inlet of a pulse jet bag filter, and the outlet of the pulse jet bag filter is connected to the inlet of an induced draft fan via a pipe. The outlets of both the cyclone separator and the pulse jet bag filter are connected to a product storage tank. Both the rotary flash dryer and the fluidized bed dryer are connected to a nitrogen circulation system.

2. The anti-accumulation drying device for manganese carbonate production as described in claim 1, characterized in that: The screw feeder is an LSY200 screw feeder.

3. The anti-accumulation drying device for manganese carbonate production as described in claim 1, characterized in that: The rotary flash dryer is the XSG-16 rotary flash dryer.

4. The anti-accumulation drying device for manganese carbonate production as described in claim 1, characterized in that: The fluidized bed dryer is an XF0.5X7 fluidized bed dryer.

5. The anti-accumulation drying device for manganese carbonate production as described in claim 1, characterized in that: The nitrogen circulation system is a DGM-100 nitrogen circulation system; a first nitrogen heater is installed on the pipe between the outlet of the nitrogen circulation system and the inlet of the rotary flash dryer; a second nitrogen heater is installed on the pipe between the outlet of the nitrogen circulation system and the inlet of the fluidized bed dryer.

6. The anti-accumulation drying device for manganese carbonate production as described in claim 1, characterized in that: The cyclone separator is an FX840 cyclone separator.

7. The anti-accumulation drying device for manganese carbonate production as described in claim 1, characterized in that: The pulse bag filter is an LCMD-48 pulse bag filter.

8. The anti-accumulation drying device for manganese carbonate production as described in claim 1, characterized in that: The exhaust outlet of the induced draft fan is connected to the exhaust gas treatment system via a pipeline.

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