Pulping tank

Abstract

The utility model discloses a slurrying tank which comprises a tank body, and an air pipe communicated with the tank body is arranged on the tank body; at least one first spray head is arranged in the air pipe, and the air pipe is arranged towards the groove body; the first spray head is connected with a spraying pipeline; and the spraying pipeline is communicated with a main anode liquid conveying pipeline. The slurrying tank provided by the utility model solves the technical problem of how to reduce the loss of materials brought out by an air pipe in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection equipment technology, and specifically relates to a slurry tank. Background Technology

[0002] The pulping process involves adding ground mineral powder from the fine powder silo to the pulping tank, where it mixes with the circulating anolyte produced in the electrolysis workshop. This anolyte is then transported to the pulping tank via a main anolyte delivery pipeline powered by an anolyte delivery pump. Residual acid in the anolyte is used for pre-leaching of the mineral powder, simultaneously preparing the slurry. The prepared slurry is then pumped to the leaching and chemical treatment workshop. Because the mineral powder is very fine, with 95% being smaller than 100 mesh, adding it to the pulping tank causes a violent chemical reaction between the powder and the sulfuric acid in the anolyte, producing carbon dioxide gas. This carbon dioxide gas, carrying water mist, carries the fine powder out from the top of the tank, severely impacting the workshop environment. Simultaneously, it causes fugitive particulate matter emissions, requiring collection and purification. Currently, the conventional practice is to install an exhaust vent at the top of the tank, with a duct connected to a dust collection system. By creating negative pressure in the dust collection tank using dust removal equipment to prevent dust from escaping, a large amount of mineral powder will enter the dust collection equipment through the ductwork, resulting in significant material loss. Therefore, how to reduce material loss carried out by the ductwork while ensuring that dust does not escape is an urgent problem to be solved. Utility Model Content

[0003] In view of the existing technical problems, the present invention aims to provide a slurry tank that can solve the technical problem of how to reduce the loss of materials carried out by the air duct in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A slurry tank includes a tank body with an air duct communicating with the tank body; its structural feature is that: at least one first nozzle is provided inside the air duct, and the air duct is sloped towards the tank body; the first nozzle is connected to a spray pipe, which is connected to the main pipe of the anolyte delivery pipe.

[0006] When using the pulping tank of this invention, the existing dust removal equipment is used to create negative pressure in the tank, preventing the flue gas inside the tank from escaping into the air. Simultaneously, the existing anolyte transfer pump in the pulping tank delivers the anolyte through the main anolyte transfer pipe and spray pipe to the first nozzle, which then sprays it into the duct. The anolyte adheres to the mineral powder in the flue gas and settles downwards. Under gravity, it flows back into the tank along the slope of the duct, thus reducing the loss of mineral powder carried out of the tank by the exhaust. This invention's pulping tank, by installing nozzles in the duct, returns the mineral powder in the flue gas to the tank, thereby reducing material loss. Furthermore, this invention's pulping tank uses the anolyte from the process pulping as the dust suppression spray liquid, eliminating the need for a separate dust suppression spray liquid. The process anolyte transfer pump provides the power, thus reducing the energy consumption required for dust suppression spraying.

[0007] Specifically, the air duct includes a main air duct and a branch air duct, the branch air duct being vertically arranged; the lower end of the branch air duct is connected to the exhaust port at the top of the trough, and the upper end is connected to the main air duct; at least one first nozzle is provided in the main air duct and / or the branch air duct; the main air duct is inclined toward the branch air duct, and the slope of the main air duct is not less than 2%.

[0008] Preferably, a grille is provided at the connection between the branch duct and the exhaust port, and an inspection port is provided on the side wall of the branch duct.

[0009] Preferably, a first baffle is provided at the bottom of the exhaust port at the top of the tank, and a second baffle is provided at the bottom of the feed port at the top of the tank. Both the first and second baffles are vertically arranged inside the tank. The first and second baffles are arranged opposite to each other, and the bottom of the exhaust port and the bottom of the feed port are separated by the first and second baffles. By setting the first and second baffles, dust at the feed port can be prevented from flowing directly from the feed port to the exhaust port.

[0010] Preferably, the first baffle is a vertically arranged cylindrical structure, and the bottom of the exhaust port is located within the space enclosed by the cylindrical structure; the height of the first baffle is not less than 1m, the height of the second baffle is not less than 1.5m, and the bottom of the first baffle and the second baffle are both not less than 1m above the liquid surface in the tank.

[0011] Preferably, the feeding port is located near one side wall of the tank, and a third baffle is provided on the side wall. There is a gap between the third baffle and the second baffle, and the bottom of the feeding port is located in the space enclosed by the second baffle, the third baffle and the side wall of the tank.

[0012] Preferably, the angle between the third baffle and the side wall of the tank is no greater than 80°.

[0013] Preferably, the second baffle includes a first connecting plate and a second connecting plate, the first connecting plate being vertically arranged; the upper end of the first connecting plate is connected to the top of the trough, and the lower end is connected to the second connecting plate, the included angle between the second connecting plate and the first connecting plate being not less than 135°.

[0014] Preferably, at least one second nozzle is provided below the feed port. This second nozzle is connected to the spray pipe, and all second nozzles are located within the space enclosed by the second baffle, the third baffle, and the side wall of the tank. By providing the second nozzles, the mineral powder and anolyte can be pre-mixed on the third baffle before flowing into the slurry tank, increasing the moisture content of the mineral powder and reducing dust generation within the tank, thereby reducing material loss.

[0015] Preferably, the second nozzles are arranged circumferentially along the axial center line of the feed port, and the second nozzles face the axial center line of the feed port.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. The slurry tank of this utility model reduces material loss by using nozzles installed inside the air duct to return mineral powder in the flue gas to the tank body.

[0018] 2. The slurry tank of this utility model uses the anolyte used in the process slurry as the dust suppression spray liquid, eliminating the need for a separate dust suppression spray liquid. The process anolyte delivery pump provides the power, thereby reducing the energy consumption required for spray dust suppression.

[0019] 3. The slurry tank of this utility model, by setting a second nozzle, a first baffle, a second baffle and a third baffle, prevents dust at the feed port from flowing directly from the feed port to the exhaust port, and increases the moisture of the mineral powder, thereby reducing material loss. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the slurry tank structure of this utility model.

[0021] In the figure

[0022] 1-Air duct; 101-Main air duct; 102-Branch air duct; 2-Spray pipe; 3-Inspection port; 4-Exhaust port; 5-First baffle; 6-First nozzle; 7-Ball valve; 8-Feeding port; 9-Second baffle; 901-First connecting plate; 902-Second connecting plate; 10-Third baffle; 11-Tank body; 12-Second nozzle; 13-Grate plate. Detailed Implementation

[0023] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0024] like Figure 1As shown, the slurry tank provided in this embodiment includes a tank body 11, with an air duct 1 above the tank body 11. The air duct 1 includes a main air duct 101 and branch air ducts 102, both of which are rectangular air ducts made of plexiglass. A maintenance port 3, measuring 600mm × 600mm, is provided on the side wall of the branch air duct 102, and is sealed with a removable blind flange made of plexiglass. The branch air duct 102 is vertically arranged, with its lower end connected to an exhaust port 4 at the top of the tank body 11 and its upper end connected to the main air duct 101. The main air duct 101 is connected to the inlet of a dust removal device. A grating plate 13, made of plexiglass, with a 5mm × 5mm aperture, is provided at the connection between the branch air duct 102 and the exhaust port 4. The main air duct 101 is inclined towards the branch air duct 102, with a slope of 2%. Multiple first nozzles 6 are provided on the inner walls of both the main air duct 101 and the branch air duct 102. Each first nozzle 6 is connected to the spray pipe 2, and a ball valve 7 is provided on each connecting pipe. The spray pipe 2 is connected to the main anolyte delivery pipe and is powered by the anolyte delivery pump. A first baffle 5 is provided at the bottom of the exhaust port 4 at the top of the tank 11, and this first baffle 5 is welded to the cover plate of the tank 11. The first baffle 5 is a vertically arranged cylindrical structure, with the bottom of the exhaust port 4 located within the space enclosed by this cylindrical structure. The height of the first baffle 5 is 1m. A feeding port 8 is provided at the top of the tank 11, located near one side wall of the tank 11. A third baffle 10 is provided on this side wall, with an angle of 75° between the third baffle 10 and the side wall of the tank 11. A second baffle 9 is provided at the bottom of the feeding port 8. The first baffle 5, the second baffle 9, and the third baffle 10 are all made of 304 stainless steel. The second baffle 9 is vertically arranged with a height of 1.5m. The bottom of both the first baffle 5 and the second baffle 9 is 1.5m above the liquid surface inside the tank 11. A gap is provided between the second baffle 9 and the third baffle 10. The bottom of the feed port 8 is located within the space enclosed by the second baffle 9, the third baffle 10, and the side wall of the tank 11. The second baffle 9 includes a first connecting plate 901 and a second connecting plate 902. The first connecting plate 901 is vertically arranged. The upper end of the first connecting plate 901 is welded to the top cover plate of the tank 11, and the lower end is connected to the second connecting plate 902. The included angle between the second connecting plate 902 and the first connecting plate 901 is 135°. Multiple second nozzles 12 are provided below the feed port 8. These second nozzles 12 are connected to the spray pipe 2, and each connecting pipe is equipped with a ball valve 7. The multiple second nozzles 12 are all located within the space enclosed by the second baffle 9, the third baffle 10, and the side wall of the tank 11. Multiple second nozzles 12 are arranged circumferentially along the axial center line of the feed port 8, and all second nozzles 12 face the axial center line of the feed port 8. The spray pipe 2, the first nozzle 6, the ball valve 7, and the second nozzles 12 are all made of 304 stainless steel. The first nozzle 6, the ball valve 7, and the second nozzles 12 are all connected to the spray pipe 2 by flanges.

[0025] In this embodiment, the slurry tank is used to create a negative pressure in the tank 11 using a dust removal device to prevent the flue gas inside the tank 11 from escaping into the air. The gas velocity in the main air duct 101 is 15 m / s, and the gas velocity in the branch air duct 102 is 4 m / s. Simultaneously, the anolyte is transported to the first nozzle 6 via the anolyte delivery pump through the main anolyte delivery pipe and the spray pipe 2. The anolyte is then sprayed into the main air duct 101 and the branch air duct 102. The anolyte adheres to the mineral powder in the flue gas and settles downwards. Under gravity, it flows back into the tank 11 along the slope of the main air duct 101, thereby reducing the loss of mineral powder material carried out of the tank 11 by the exhaust fan. By setting the first baffle 5 and the second baffle 9, a portion of the dust can be prevented from flowing directly from the feed port 8 to the exhaust port 4. Simultaneously, the anolyte is transported to the second nozzle 12 via the anolyte delivery pump through the main anolyte delivery pipeline and the spray pipe 2. The anolyte is then sprayed below the feed inlet 8 through the second nozzle 12, allowing the material and spray liquid to premix on the third baffle 10 before flowing into the tank 11. This increases the material's moisture content and reduces dust generation within the tank 11. The spray liquid in the spray pipe 2 comes from the process anolyte pump, eliminating the need for external spray liquid and energy consumption. The spray liquid at the main air duct 101, branch air duct 102, and third baffle 10 flows by gravity into the slurry tank to complete the slurrying process.

[0026] The above embodiments should be understood as being used only to illustrate the utility model more clearly, and not to limit the scope of the utility model. After reading this utility model, any modifications of the embodiments by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

Claims

1. A slurry tank, comprising a tank body (11), wherein a duct (1) communicating with the tank body (11) is provided on the tank body (11); characterized in that: The air duct (1) is provided with at least one first nozzle (6), and the air duct (1) is sloped toward the tank (11); the first nozzle (6) is connected to the spray pipe (2), and the spray pipe (2) is connected to the main pipe of the anolyte conveying pipe.

2. The slurry tank according to claim 1, characterized in that: The air duct (1) includes a main air duct (101) and a branch air duct (102), the branch air duct (102) being vertically arranged; the lower end of the branch air duct (102) is connected to the exhaust port (4) at the top of the trough (11), and the upper end is connected to the main air duct (101); at least one first nozzle (6) is provided in the main air duct (101) and / or the branch air duct (102); the main air duct (101) is inclined toward the branch air duct (102), and the slope of the main air duct (101) is not less than 2%.

3. The slurry tank according to claim 2, characterized in that: A grille (13) is provided at the connection between the branch duct (102) and the exhaust port (4), and an inspection port (3) is provided on the side wall of the branch duct (102).

4. The slurry tank according to claim 1, characterized in that: The bottom of the exhaust port (4) at the top of the tank (11) is provided with a first baffle (5), and the bottom of the feed port (8) at the top of the tank (11) is provided with a second baffle (9). The first baffle (5) and the second baffle (9) are both vertically arranged in the tank (11). The first baffle (5) and the second baffle (9) are arranged opposite to each other, and the bottom of the exhaust port (4) and the bottom of the feed port (8) are separated by the first baffle (5) and the second baffle (9).

5. The slurry tank according to claim 4, characterized in that: The first baffle (5) is a vertically arranged cylindrical structure, and the bottom of the exhaust port (4) is located in the space surrounded by the cylindrical structure; the height of the first baffle (5) is not less than 1m, the height of the second baffle (9) is not less than 1.5m, and the bottom of the first baffle (5) and the second baffle (9) are both not less than 1m above the liquid surface in the tank (11).

6. The slurry tank according to claim 4, characterized in that: The feeding port (8) is located near the side wall of the tank (11), and a third baffle (10) is provided on the side wall. There is a gap between the third baffle (10) and the second baffle (9). The bottom of the feeding port (8) is located in the space enclosed by the second baffle (9), the third baffle (10) and the side wall of the tank (11).

7. The slurry tank according to claim 6, characterized in that: The angle between the third baffle (10) and the side wall of the trough (11) is no greater than 80°.

8. The slurry tank according to claim 6, characterized in that: The second baffle (9) includes a first connecting plate (901) and a second connecting plate (902). The first connecting plate (901) is vertically arranged. The upper end of the first connecting plate (901) is connected to the top of the groove (11), and the lower end is connected to the second connecting plate (902). The included angle between the second connecting plate (902) and the first connecting plate (901) is not less than 135°.

9. The slurry tank according to claim 6, characterized in that: At least one second nozzle (12) is provided below the feeding port (8). The second nozzle (12) is connected to the spray pipe (2) and is located in the space enclosed by the second baffle (9), the third baffle (10) and the side wall of the tank (11).

10. The slurry tank according to claim 9, characterized in that: The second nozzle (12) is arranged circumferentially along the axial center line of the feed port (8), and the second nozzle (12) faces the axial center line of the feed port (8).

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