A new shredding device for the pretreatment of metal sludge

Abstract

The utility model discloses a novel crushing device for the pretreatment of metal sludge, which comprises a first crushing mechanism for preliminarily crushing the blocky sludge, a second crushing mechanism for secondarily crushing the blocky sludge installed below the first crushing mechanism, and a first pressing group installed above the inlet of the upper machine box. The utility model adopts the structure design of the combination of the pressing plate and the flow dividing piece at the first pressing group. The water flows through the liquid injection port and falls into the drainage notch of the pressing plate, and then is guided to the flow dividing piece. The flow dividing piece divides the water into several parts, and the divided water falls uniformly and forms a water curtain, thereby effectively removing the dust from the inlet of the upper machine box and greatly relieving the dust overflow at the inlet.

Description

Technical Field

[0001] This utility model relates to the field of metal sludge treatment technology, and in particular to a novel crushing device for pretreatment of metal sludge. Background Technology

[0002] Metal sludge is a muddy waste rich in metal components generated during industrial production processes. It is typically composed of a mixture of solid particles, various heavy metal ions, and gravel. Because metal sludge contains heavy metals such as copper, nickel, chromium, and zinc, its resource recovery offers certain economic benefits. Before resource recovery of metal sludge, systematic and effective pretreatment is essential, a crucial step for achieving efficient metal extraction and process control. Pretreatment typically includes dewatering, crushing, and drying. Mechanical dewatering equipment, such as plate and frame filter presses and centrifuges, produces lumpy sludge with low moisture content but large volume and dense structure. These lumpy sludge lumps are hard and vary in size, requiring crushing to break them into smaller particles to improve the reaction efficiency and uniformity of subsequent processes. The crushing process of dried lumpy sludge generates a large amount of fine dust, which continuously emerges from the inlet of the crushing equipment, causing dust pollution on-site. Therefore, we propose a novel crushing device for the pretreatment of metal sludge. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a novel crushing device for the pretreatment of metal sludge.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a novel crushing device for pretreatment of metal sludge, comprising a first crushing mechanism for preliminary crushing of lumpy sludge, a second crushing mechanism for secondary crushing of lumpy sludge installed below the first crushing mechanism, the first crushing mechanism comprising an upper casing, a crushing wheel installed inside the upper casing, and a first pressing assembly installed above the crushing wheel near the feed inlet of the upper casing.

[0005] The first pressing assembly includes a pressing plate, which has a hinge end and a pressing end. The hinge end of the pressing plate is installed at the hinge shaft inside the upper housing. The pressing end of the pressing plate is connected to a compression spring inside the upper housing. A U-shaped flow channel is provided between the hinge end and the pressing end. A flow divider is installed at the flow channel. The flow divider has a liquid collecting plate and a liquid discharging plate. The included angle between the liquid collecting plate and the liquid discharging plate is an obtuse angle. The liquid collecting plate has several flow dividing plates. An injection port is opened at the upper housing. The injection port is located directly above the flow channel of the pressing plate.

[0006] To further elaborate, the flow divider is provided with a through-shaft hole, and the pressure plate is provided with a connecting shaft, which passes through the through-shaft hole of the flow divider.

[0007] To elaborate further, the angle between the liquid receiving plate and the liquid discharging plate is 120°-150°.

[0008] To elaborate further, a pressure head is installed on the lower side of the pressure plate, and screw connection holes for connecting to the pressure head are provided on both sides of the pressure plate.

[0009] To elaborate further, the upper casing is provided with a second pressing group and a third pressing group, and the first pressing group, the second pressing group and the third pressing group are distributed circumferentially at equal intervals along the crushing wheel.

[0010] To elaborate further, a receiving hopper is provided between the second crushing mechanism and the first crushing mechanism. The upper end of the receiving hopper is connected to the lower discharge port of the first crushing mechanism, and the lower end of the receiving hopper is connected to the upper feed port of the second crushing mechanism.

[0011] To elaborate further, the second crushing mechanism is equipped with two crushing wheels arranged side by side.

[0012] The beneficial effects of this utility model are as follows: This utility model adopts a structural design that combines a pressure plate and a diverter at the first pressure assembly. Water flows through the injection port and falls into the diversion groove of the pressure plate. The diversion groove then guides the water to the diverter. The diverter's diversion plate divides the water, so that the divided water falls evenly and forms a water curtain, thereby effectively removing dust from the feed inlet of the upper casing and greatly alleviating the situation of dust overflowing from the feed inlet. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a cross-sectional view of the internal structure of the first crushing mechanism.

[0015] Figure 3 This is a schematic diagram of the first pressing unit.

[0016] Figure 4 This is a schematic diagram of the flow divider.

[0017] Figure 5 This is a schematic diagram of the second crushing mechanism.

[0018] Reference numerals: 10. First crushing mechanism; 101. First pressing group; 102. Second pressing group; 103. Third pressing group; 11. Upper casing; 111. Liquid injection port; 112. Feed inlet; 12. Crushing wheel; 13. Pressing plate; 131. Hinge end; 132. Pressing end; 133. Drainage groove; 134. Screw connection hole; 14. Hinge shaft; 15. Compression spring; 16. Diverter; 161. Liquid receiving plate; 162. Liquid outlet plate; 163. Diverter section; 164. Through shaft hole; 17. Connecting shaft; 18. Pressing head; 20. Second crushing mechanism; 21. Crushing wheel; 30. Receiving hopper. Detailed Implementation

[0019] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0020] Combined with appendix Figure 1 As shown, a novel crushing device for pretreatment of metal sludge includes a first crushing mechanism 10 for initial crushing of lumpy sludge, and a second crushing mechanism 20 installed below the first crushing mechanism 10 for secondary crushing of lumpy sludge. The first crushing mechanism 10 crushes large lumpy metal sludge into several small pieces, and the second crushing mechanism 20 further crushes the small pieces of lumpy metal sludge.

[0021] Combined with appendix Figure 1 To be continued Figure 3 As shown, the first crushing mechanism 10 includes an upper housing 11, a crushing wheel 12 is installed inside the upper housing 11, and a first pressing group 101 is installed above the crushing wheel 12 near the feed inlet 112 of the upper housing 11. When large pieces of blocky metal sludge are inserted into the feed inlet 112 of the upper housing 11, they are continuously pushed closer to the crushing wheel 12 by the limiting effect of the first pressing group 101, and are thus crushed into several small pieces.

[0022] Combined with appendix Figure 3 As shown, the first pressing group 101 includes a pressing plate 13. The pressing plate 13 is provided with a hinge end 131 and a pressing end 132. The hinge end 131 of the pressing plate 13 is installed at the hinge shaft 14 in the upper housing 11. The pressing end 132 of the pressing plate 13 is connected to the compression spring 15 in the upper housing 11. A U-shaped flow channel 133 is provided between the hinge end 131 and the pressing end 132. A flow divider 16 is installed at the flow channel 133.

[0023] A liquid injection port 111 is provided at the upper casing 11, located directly above the flow channel 133 of the pressure plate 13. When dust removal is required, water can be injected directly into the upper casing 11 through the liquid injection port 111 at a flow rate of 15-20 ml per second. The water flows through the liquid injection port 111 and falls into the flow channel 133 of the pressure plate 13, where it is then concentrated and guided to the distribution component 16.

[0024] Combined with appendix Figure 3 and attached Figure 4 As shown, the diverter 16 is provided with a liquid receiving plate 161 and a liquid discharging plate 162. The included angle between the liquid receiving plate 161 and the liquid discharging plate 162 is an obtuse angle. The liquid receiving plate 161 is provided with a plurality of diverting plates 163. The included angle between the liquid receiving plate 161 and the liquid discharging plate 162 is 120°-150°. After the liquid receiving plate 161 of the diverter 16 receives water, the water is diverted by the diverting plates 163. The diverted water falls evenly and forms a water curtain, thereby effectively removing dust from the feed inlet 112 of the upper casing 11 and greatly alleviating the situation of dust overflow from the feed inlet 112.

[0025] Combined with appendix Figure 3 and attached Figure 4 As shown, a through-shaft hole 164 is provided at the flow divider 16, and a connecting shaft 17 is provided at the pressure plate 13. The connecting shaft 17 passes through the through-shaft hole 164 of the flow divider 16. A pressure head 18 is installed on the lower side of the pressure plate 13, and screw connection holes 134 for connecting with the pressure head 18 are provided on both sides of the pressure plate 13.

[0026] Combined with appendix Figure 2 As shown, the upper casing 11 is equipped with a second pressing group 102 and a third pressing group 103. The first pressing group 101, the second pressing group 102, and the third pressing group 103 are distributed circumferentially at equal intervals along the crushing wheel 12. When large pieces of lumpy metal sludge are fed into the feed inlet 112 of the upper casing 11, a portion of the lumpy metal sludge is crushed by the first pressing group 101, and the remaining lumpy metal sludge is further crushed by the second pressing group 102 and the third pressing group 103.

[0027] Combined with appendix Figure 1 and attached Figure 5 As shown, a receiving hopper 30 is provided between the second crushing mechanism 20 and the first crushing mechanism 10. The upper end of the receiving hopper 30 connects to the lower discharge port of the first crushing mechanism 10, and the lower end of the receiving hopper 30 connects to the upper feed port of the second crushing mechanism 20. The second crushing mechanism 20 has two crushing wheels 21 arranged side-by-side. Large pieces of lumpy metal sludge are crushed into several smaller pieces by the first crushing mechanism 10. These smaller pieces of lumpy metal sludge fall into the second crushing mechanism 20 through the receiving hopper 30. The two crushing wheels 21 of the second crushing mechanism 20 rotate in opposite directions, thereby further crushing the smaller pieces of lumpy metal sludge.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0030] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the technical scope of this utility model.

Claims

1. A novel crushing device for pretreatment of metal sludge, comprising a first crushing mechanism (10) for preliminary crushing of lumpy sludge, a second crushing mechanism (20) for secondary crushing of lumpy sludge installed below the first crushing mechanism (10), the first crushing mechanism (10) comprising an upper housing (11), a crushing wheel (12) installed inside the upper housing (11), and a first pressing group (101) installed above the crushing wheel (12) near the feed inlet (112) of the upper housing (11), characterized in that: The first pressing assembly (101) includes a pressing plate (13), which has a hinge end (131) and a pressing end (132). The hinge end (131) of the pressing plate (13) is installed at the hinge shaft (14) inside the upper housing (11). The pressing end (132) of the pressing plate (13) is connected to the compression spring (15) inside the upper housing (11). A U-shaped drainage slot is provided between the hinge end (131) and the pressing end (132). 133), a diverter (16) is installed at the diversion slot (133). The diverter (16) is provided with a liquid receiving plate (161) and a liquid outlet plate (162). The included angle between the liquid receiving plate (161) and the liquid outlet plate (162) is an obtuse angle. The liquid receiving plate (161) is provided with a plurality of diverter plates (163). The upper casing (11) is provided with an injection port (111). The injection port (111) is located directly above the diversion slot (133) of the pressure plate (13).

2. The novel shredding device for pretreatment of metal sludge according to claim 1, characterized in that: The diverter (16) has a through-shaft hole (164), and the pressure plate (13) has a connecting shaft (17), which passes through the through-shaft hole (164) of the diverter (16).

3. A novel shredding device for pretreatment of metal sludge according to claim 1 or 2, characterized in that: The angle between the liquid receiving plate (161) and the liquid discharging plate (162) is 120°-150°.

4. A novel shredding device for pretreatment of metal sludge according to claim 1 or 2, characterized in that: A pressure head (18) is installed on the lower side of the pressure plate (13), and screw connection holes (134) for connecting with the pressure head (18) are provided on both sides of the pressure plate (13).

5. A novel shredding device for pretreatment of metal sludge according to claim 1, characterized in that: The upper housing (11) is provided with a second pressing group (102) and a third pressing group (103). The first pressing group (101), the second pressing group (102), and the third pressing group (103) are circumferentially distributed at equal intervals along the crushing wheel (12).

6. A novel shredding device for pretreatment of metal sludge according to claim 1, characterized in that: A receiving hopper (30) is provided between the second crushing mechanism (20) and the first crushing mechanism (10). The upper end of the receiving hopper (30) is connected to the lower discharge port of the first crushing mechanism (10), and the lower end of the receiving hopper (30) is connected to the upper feed port of the second crushing mechanism (20).

7. A novel shredding device for pretreatment of metal sludge according to claim 1, characterized in that: The second crushing mechanism (20) is provided with two crushing wheels (21) arranged side by side.

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