Steam tail gas treatment system of belt filter for rare earth carbonate

Abstract

The utility model relates to the technical field of belt filters, in particular to a steam tail gas treatment system of a belt filter for rare earth carbonate, which comprises a sealing cover fixedly covering the belt filter. Airflow treated by the dehumidification frequency conversion fan is discharged to the high altitude of a factory along a chimney connected with an air outlet of the dehumidification frequency conversion fan, and online collection, conveying, water falling and steam tail gas emptying can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of belt filter technology, specifically to a steam exhaust gas treatment system for rare earth carbonate belt filters. Background Technology

[0002] The rare earth solution carbon precipitation process uses rare earth chloride solution as raw material and ammonium bicarbonate as precipitant in a reaction tank. The reaction produces a slurry of rare earth carbonate, which is then separated into solid and liquid components using filtration equipment such as a belt filter. The separated solid is the rare earth carbonate product.

[0003] Belt filters generate a large amount of steam during the filtration process. If this steam is not collected and treated, it will seriously affect the working environment inside the factory and the health of workers in the area. In winter, it will produce a large amount of white fog, which will condense on equipment and factory beams and columns, corroding steel structures and affecting visibility in the work area, posing a significant safety hazard to production activities. Utility Model Content

[0004] The present invention aims to at least solve the problem that the steam generated by belt filters in the prior art does not have a dedicated treatment structure.

[0005] This solution provides a steam exhaust gas treatment system for belt filters used in rare earth carbonates. It can collect, transport, dehumidify, and vent steam exhaust gas online, which is achieved by the following specific technical means: including a sealed cover fixedly installed on the belt filter, the sealed cover being connected to a dehumidifying variable frequency fan through a ventilation duct, and the airflow treated by the dehumidifying variable frequency fan being discharged to the factory altitude along a chimney connected to the air outlet of the dehumidifying variable frequency fan.

[0006] Preferred technical solution 1: The ventilation duct is provided with a drain outlet.

[0007] Preferred technical solution 2: The sealing cover is a visible cover.

[0008] Preferred technical solution 3: The main structure of the sealing cover is constructed from a stainless steel frame, and the surrounding protective structure of the stainless steel frame is made of transparent PVC sheet, thereby forming multiple observation windows on the sealing cover.

[0009] Preferred technical solution four: An electronically controlled valve is installed inside the exhaust port to achieve online control.

[0010] The above structure gives this solution the following advantages:

[0011] 1. Small investment, small footprint, good steam collection effect, and the collected steam condensate can be reused in the production line, making it suitable for large-scale continuous industrial operations.

[0012] 2. It can achieve automated operation, the operation process is simple, and the equipment has good sealing performance. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0015] Figure 2 This is a side view of the sealing cover in this design.

[0016] The components include: 1. Sealing cover, 2. Transparent PVC board, 3. Observation window, 4. Exhaust port, 5. Belt filter, 6. Ventilation duct, 7. Fan, and 8. Chimney. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-2 A rare earth carbonate belt filter steam exhaust gas treatment system includes a sealing cover 1 fixedly mounted on a belt filter 5. The sealing cover 1 is a visible cover. The sealing cover 1 is connected to a dehumidifying variable frequency fan 7 via a ventilation duct 6. The airflow treated by the dehumidifying variable frequency fan 7 is discharged outside the factory through a chimney 8 connected to the outlet of the dehumidifying variable frequency fan 7. One end of the ventilation duct 6 is fixedly connected to the exhaust port 4 of the sealing cover 1. An automatic shut-off valve is installed in the exhaust port 4 to achieve online control. The other end of the ventilation duct 6 is fixedly connected to the air inlet of the dehumidifying variable frequency fan 7. A drain outlet is provided on the ventilation duct 6. The dehumidifying variable frequency fan 7 is connected to the chimney 8 via an exhaust pipe.

[0019] Please see Figure 2 The steam exhaust gas treatment system for rare earth carbonate belt filter has a visible sealing cover 1 whose size is adjusted to match the overall length of the belt filter 5. Multiple sets of exhaust ports 4 are opened on the top of the sealing cover 1 along the length direction. Depending on the required ventilation volume of the belt filter 5, the diameter of the ventilation duct 6 connected to the exhaust port 4 is generally between DN250 and DN500. The main structure of the sealing cover 1 is built with a stainless steel frame, and the surrounding protective structure of the stainless steel frame is made of transparent PVC board 2, thus forming multiple sets of observation windows 3 on the sealing cover 1.

[0020] Specific usage process: The top filter belt of the belt filter 5 is the main area for steam generation, which needs to be collected and treated. The lower end of the sealing cover 1 is fixedly installed on the belt filter 5 to collect steam. After being collected by the sealing cover 1, the steam is discharged through the exhaust port 4 and enters the dehumidifying variable frequency fan 7 through the ventilation duct 6. During the flow of steam in the ventilation duct 6, some of the steam condenses and is discharged from the drain port. The remaining steam enters the dehumidifying variable frequency fan 7 for further dehumidification and is finally discharged to the high altitude of the plant through the chimney 8.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A belt filter steam exhaust gas treatment system for rare earth carbonates, characterized in that: Includes a sealing cover (1) fixedly mounted on the belt filter (5), the sealing cover (1) being connected to the fan (7) via a ventilation duct (6), and the airflow processed by the fan being discharged to the factory height along the chimney (8) connected to the air outlet of the fan (7); The top of the sealing cover (1) is connected to the ventilation duct (6) through an exhaust port (4); An electrically controlled valve is installed inside the exhaust port (4); The exhaust port (4) has multiple sets of openings along the length direction on the top of the sealing cover (1).

2. The belt filter steam exhaust gas treatment system for rare earth carbonates according to claim 1, characterized in that: A drain outlet is provided on the ventilation duct (6).

3. The belt filter steam exhaust gas treatment system for rare earth carbonates according to claim 1, characterized in that: The sealing cover (1) is a visible cover.

4. The belt filter steam exhaust gas treatment system for rare earth carbonates according to claim 1, characterized in that: The fan (7) is a dehumidifying variable frequency fan.

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