Filtering device for nickel sulfate silica-removed liquid

Abstract

The utility model discloses a filtering device for nickel sulfate desilication liquid, which comprises a filter press platform, a filter press, two filter press hoppers, a slurrying tank and a slurrying liquid delivery pump, the two filter press hoppers are fixed below the filter press platform in a W shape, the filter press platform is provided with a slag discharging channel above the filter press hoppers, and the slurrying liquid delivery pump is arranged in the slag discharging channel. Outlets below the hoppers of the filter presses are connected with a slurrying tank; and the slurrying tank is connected with a slurrying liquid conveying pump through a pipeline. Compared with an existing silicon removal filter pressing device, the silicon removal filter pressing device has the advantages that a double-slag-discharging-channel mode with two hoppers is adopted, the inclination angle of the hoppers is increased, the slag discharging process is quicker and smoother, and the problem that the hoppers are blocked by filter residues is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of nickel sulfate sulfur process desiliconization process production, in particular to a filtering device for nickel sulfate post-siliconization liquid. Background Art

[0002] During the nickel sulfate production process, the silicon content in the crude nickel sulfate solution from the leaching process often exceeds the standard. Before entering the extraction process to prepare refined nickel sulfate, the crude nickel sulfate solution needs to be desiliconized. Usually, polyaluminum sulfate is added to the crude nickel sulfate solution to form a colloid with the silicate in the crude nickel sulfate solution, thus forming a desiliconized nickel sulfate solution containing silicate colloid. Then, a filtration device is required to remove the silicate colloid from the nickel sulfate solution to obtain a clear nickel sulfate solution for the extraction process. The current separation equipment is a single slurry tank. In actual production, it has been found that the filtered solids do not fall smoothly and are prone to blockage in the slag hopper, which requires manual dredging to ensure smooth flow. Utility Model Content

[0003] The purpose of the utility model is to provide a filtering device for nickel sulfate desiliconized liquid, which can prevent solids from blocking the filtered liquid.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A filtering device for nickel sulfate desiliconized liquid comprises a filter press platform, a filter press, a filter press hopper, a slurrying tank, and a slurrying liquid delivery pump. The filter press hoppers are two and are fixed in a "W" shape below the filter press platform. The filter press platform is provided with a slag discharge channel above the filter press hoppers. The outlets below the filter press hoppers are connected to the slurrying tank, and the slurrying tank is connected to the slurrying liquid delivery pump through a pipeline.

[0006] Preferably, the filter press is placed above the filter press platform, and steel platforms are preset on both sides of the filter press for filter plate removal operations.

[0007] Preferably, the slurry tank is placed on the ground and is made of PPH material, and a feed port and a manhole are provided on the slurry tank cover, which are respectively used to connect to the outlet below the filter press hopper and observe the conditions inside the slurry tank.

[0008] Preferably, a slurry tank stirring device is provided in the center of the slurry tank.

[0009] Preferably, an acid mist exhaust port is also provided on the slurry tank cover.

[0010] Preferably, a slurry liquid outlet is provided on the side wall of the slurry tank.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0012] Compared with the existing desiliconization filter press device, the utility model adopts a double slag discharge channel method with two hoppers. The inclination angle of the hopper is increased, making the slag discharge process faster and smoother, avoiding the problem of filter residue blocking the hopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a top view of the utility model;

[0015] Figure 3 It is a top view of the slurry tank cover of the utility model.

[0016] In the figure: 1- filter press platform, 2- filter press, 3- filter press hopper, 4- slurrying tank, 5- slurrying liquid delivery pump, 6- steel platform, 7- feed inlet, 8- manhole, 9- slurrying tank stirring, 10- acid mist exhaust port, 11- slurrying liquid outlet. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-Figure 3 As shown, a filtering device for nickel sulfate desiliconized liquid includes a filter press platform 1, a filter press 2, a filter press hopper 3, a slurry tank 4, and a slurry liquid delivery pump 5. There are two filter press hoppers 3, which are fixed in a "W" shape below the filter press platform 1. The filter press platform 1 is provided with a slag discharge channel above the filter press hopper 3. The outlets below the filter press hopper 3 are connected to the slurry tank 4, and the slurry tank 4 is connected to the slurry liquid delivery pump 5 through a pipeline.

[0019] The filter press 2 is placed above the filter press platform 1. A hole is opened in the middle of the filter press platform 1 to provide a channel for the filter residue of the filter press 2 to be discharged. A return edge is set around the hole of the filter press platform 1 to support the installation of the filter press 2 and prevent sewage in the filter press 2 area from leaking out of the hole. The filter press 2 is a medium-pressure device with an operating pressure of 0.4-0.6MPa to facilitate the filtration of silicate colloids in the nickel sulfate solution. Steel platforms 6 are set on both sides of the filter press 2 for filter plate removal operations. The filter press hopper 3 is fixed under the filter press platform 1. The filter press hopper 3 is made of carbon steel. The filter press hopper 3 is fixed to the bottom of the filter press platform 1 by pre-embedded bolts at the bottom of the beam around the hole of the filter press platform 1, and the filter press hopper 3 is fixed to the bottom of the filter press platform 1 through bolt connection. The outlet below the filter press hopper 3 is connected to the slurry tank 4. The slurry tank 4 is made of PPH material, and there are two of them. A slurry tank stirrer 9 is set in the center of the slurry tank 4 cover, and a manhole 8 is set around the trough cover for observing the slurry tank, and an acid mist exhaust port 10 is set to connect to the external acid mist pipeline to extract the acid mist in the slurry tank in time to ensure a good on-site working environment. A slurry liquid outlet 11 is set on the side wall of the slurry tank 4 and is connected to the slurry liquid delivery pump 5 through a pipeline connection. The slurry liquid delivery pump 5 delivers the slurry liquid to the downstream process.

[0020] The working process of this device is as follows: a turbid nickel sulfate liquid containing silicate colloid is obtained from the silicon removal multipolar tank reaction, and is transported to the filter press 2 through a pipeline. The working pressure of the filter press 2 is maintained at 0.4-0.6MPa, and the silicate colloid impurities and the nickel sulfate liquid mixture are filtered. The filtered liquid is transported to the extraction process through a pipeline, and the filter residue leaks into the "W"-shaped filter press hopper 3 through the filter press 2 platform, and enters the two slurrying tanks 4 through the filter press hopper 3. Water is passed into the slurrying tank 4 to form a slurry liquid. After the slurry liquid is uniformly matured under the action of the slurrying tank stirring 9, it enters the slurrying liquid delivery pump 5 through the slurry liquid outlet 11 pipeline on the side wall of the slurrying tank, and enters the downstream process for treatment by pump delivery.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to modification and variation. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A filtering device for nickel sulfate desiliconized liquid, comprising a filter press platform (1), a filter press (2), a filter press hopper (3), a slurry tank (4), and a slurry liquid delivery pump (5), characterized in that: The filter press hoppers (3) are two and are fixed in a "W" shape below the filter press platform (1). The filter press platform (1) is provided with a slag discharge channel above the filter press hopper (3). The outlets below the filter press hopper (3) are connected to the slurry tank (4), and the slurry tank (4) is connected to the slurry liquid delivery pump (5) through a pipeline.

2. A filtering device for nickel sulfate desiliconized liquid according to claim 1, characterized in that: The filter press (2) is placed above the filter press platform (1), and steel platforms (6) are preset on both sides of the filter press (2) for filter plate disassembly operations.

3. A filtering device for nickel sulfate desiliconized liquid according to claim 1, characterized in that: The slurry tank (4) is placed on the ground and is made of PPH material. A feed port (7) and a manhole (8) are provided on the cover of the slurry tank (4), which are used to connect to the outlet below the filter press hopper (3) and observe the conditions inside the slurry tank (4), respectively.

4. A filtering device for nickel sulfate desiliconized liquid according to claim 1, characterized in that: A slurry tank stirrer (9) is provided in the center of the slurry tank (4).

5. The filtering device for nickel sulfate desiliconized liquid according to claim 1, characterized in that: The slurry tank (4) cover is also provided with an acid mist exhaust port (10).

6. A filtering device for nickel sulfate desiliconized liquid according to claim 1, characterized in that: The side wall of the slurry tank (4) is provided with a slurry liquid outlet (11).

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