Impurity removal equipment for zinc chloride production

Abstract

The utility model provides impurity removal equipment for zinc chloride production, which comprises a separation tank, an oxidation tank is arranged above the separation tank, an upper coil pipe and a lower coil pipe which are distributed up and down are fixed in the oxidation tank, and a feeding end of the upper coil pipe penetrates through the top of the oxidation tank. The discharge end of the lower coil pipe penetrates through the bottom of the oxidation tank and is communicated with a discharge pipe penetrating through the top of the separation tank; a connecting shell is fixed in the oxidation tank through a fixing block, the discharging end of the upper coil pipe and the feeding end of the lower coil pipe are communicated with the top and the bottom of the connecting shell respectively, and two baffle plates located between the discharging end of the upper coil pipe and the feeding end of the lower coil pipe respectively are fixed in the connecting shell. According to the utility model, a zinc chloride raw material solution can be effectively preheated and then effectively and comprehensively mixed with air, so that sulfite radicals are thoroughly desulfurized after being subjected to a sufficient oxidation reaction, and the quality of subsequent zinc chloride production is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of impurity removal equipment, in particular to impurity removal equipment for zinc chloride production. Background Art

[0002] Zinc chloride is a common industrial raw material; it is widely used in inorganic industry, organic industry, organic synthesis, special surfactants, petroleum industry, dye industry, rubber industry, printing and dyeing industry, electroplating industry, pigment industry, metallurgical industry, welding, coal plants and other fields.

[0003] There are many synthetic routes for zinc chloride. It can be synthesized from zinc alone and hydrogen or phosphorus oxychloride, from zinc oxide combined with hydrochloric acid, or through the reaction of zinc sulfate and hydrogen fluoride. However, with the development of industry, raw materials such as zinc ingots and zinc oxide are in short supply, so there is a need to find ways to expand the development of the zinc chloride industry. The main component of the waste slag produced during zinc ore smelting is zinc suboxide, which also contains a certain amount of zinc oxide and other metal elements such as iron, indium, and arsenic. In order to expand the raw material source for zinc chloride production and reduce the pollution caused by waste slag emissions from metal smelting, it has become a common production method to use zinc-containing waste slag mainly containing zinc suboxide as raw material for zinc chloride production.

[0004] The method for preparing zinc chloride using secondary zinc oxide as the main raw material mainly includes the following steps: hydrochloric acid dissolution, primary impurity removal with barium chloride, secondary impurity removal with potassium permanganate, zinc powder replacement, drying and crystallization, crushing and packaging, etc. Among them, the primary impurity removal with barium chloride is to remove sulfur by combining the barium ions in the barium chloride with the sulfate ions contained in the slag to precipitate. Since most zinc ores contain sulfur, this step is an indispensable link. In order to convert the sulfite ions in the solution into sulfate ions and thus completely desulfurize, it is necessary to first introduce air to allow the oxygen in the air to oxidize it and then add barium chloride for precipitation. However, when the current impurity removal equipment is in use, when the zinc chloride raw material liquid flows too fast in the pipeline and does not reach the most suitable temperature, the zinc chloride raw material liquid will not be effectively mixed with the air, resulting in the oxygen in the air not being able to fully oxidize the sulfite ions, so that the sulfite ions cannot be completely desulfurized, thereby reducing the quality of the subsequent zinc chloride produced. Utility Model Content

[0005] The utility model discloses an impurity removal device for zinc chloride production, which solves the problem that when the flow rate of zinc chloride raw material liquid in a pipeline is too fast and the temperature has not reached the most suitable temperature, the zinc chloride raw material liquid cannot be effectively mixed with air, so that sulfite cannot be completely desulfurized, and the quality of the produced zinc chloride is reduced.

[0006] In order to solve the above technical problems, the present invention specifically adopts the following technical solutions:

[0007] The hopper is connected to the feed pipe of the hopper and the feed pipe of the hopper are connected to the feed pipe of the hopper, and the feed pipe of the hopper is connected to the feed pipe of the hopper.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] First, warm water is injected into the oxidation tank through the water injection pipe to make the temperature inside the oxidation tank more suitable for the oxidation reaction of sulfite. The feed end of the upper coil is connected to the external pipe for conveying the zinc chloride raw material liquid. When the zinc chloride raw material liquid enters the upper coil, it is first preheated by the warm water in the oxidation tank. When the zinc chloride raw material liquid enters the connecting shell, the external air pump inputs air into the fixed shell through the air inlet pipe, and the air is discharged through the perforations on the fixed shell, so that a large number of bubbles are formed in the connecting shell, so that the zinc chloride raw material liquid entering the connecting shell is fully mixed with the air, thereby improving the oxidation degree of sulfite by oxygen. At the same time, the two baffles can extend the flow distance of the zinc chloride raw material liquid in the connecting shell so that the sulfite can be completely desulfurized. And when the zinc chloride raw material liquid enters the upper coil or When the zinc chloride raw material liquid is in the lower coil, the two air transmission components can also respectively inject air into the upper coil and the lower coil, so that the zinc chloride raw material liquid passing through is fully mixed with the air. At the same time, the arrangement of the upper coil and the lower coil can effectively extend the flow path of the zinc chloride raw material liquid; after the zinc chloride raw material liquid subsequently enters the separation tank through the discharge pipe, the stirring component is started and barium chloride is added into the separation tank, the barium chloride and the raw material liquid are stirred and mixed, the barium ions and sulfate ions form barium sulfate precipitation, and the clear liquid containing zinc chloride passes through the filter and is discharged through the discharge pipe; the utility model can effectively preheat the zinc chloride raw material liquid, and then effectively and comprehensively mix the zinc chloride raw material liquid with the air, so that the sulfite undergoes a sufficient oxidation reaction and then is completely desulfurized, thereby ensuring the quality of the subsequent zinc chloride production. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic structural diagram of the utility model;

[0011] Figure 2 This is a schematic structural diagram of a cross-section of an oxidation tank according to the present invention;

[0012] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at point A;

[0013] Figure 4 This is a schematic diagram of the structure of the connection shell of the utility model from a top view;

[0014] Figure 5 This is a schematic structural diagram of a sectional view of a separation tank of the present invention.

[0015] In the figure: 1. Separation tank; 11. Discharge pipe; 12. Discharge pipe; 2. Oxidation tank; 21. Upper coil pipe; 22. Lower coil pipe; 23. Discharge pipe; 24. Water injection pipe; 25. Drain pipe; 26. Electric heating rod; 27. Support leg; 3. Connecting shell; 31. Baffle; 32. Fixed shell; 33. Inlet pipe; 34. Exhaust pipe; 4. Arc shell; 41. Short cylinder; 42. Gas pipe; 5. Stirring rod; 51. Round shell; 52. Inclined pipe; 53. Vertical pipe; 54. Motor; 55. Driving gear; 56. Driven gear; 6. Slag discharge pipe; 7. Filter screen; 8. Lower hopper; 9. Load-bearing block. DETAILED DESCRIPTION

[0016] The specific contents of the utility model are described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the utility model provides an impurity removal device for zinc chloride production, including a separation tank 1, an oxidation tank 2 is provided above the separation tank 1, an upper coil 21 and a lower coil 22 are fixed in the oxidation tank 2, the feed end of the upper coil 21 passes through the top of the oxidation tank 2, the discharge end of the lower coil 22 passes through the bottom of the oxidation tank 2 and is connected to a discharge pipe 23 passing through the top of the separation tank 1; a connecting shell 3 is fixed in the oxidation tank 2 through a fixing block, the discharge end of the upper coil 21 and the feed end of the lower coil 22 are respectively connected to the top and bottom of the connecting shell 3, and two connecting shells are fixed in the connecting shell 3. A baffle 31 is provided between the discharge end of the upper coil 21 and the feed end of the lower coil 22; a fixed shell 32 with a perforated surface and located between the two baffles 31 is fixed in the connecting shell 3, and the fixed shell 32 is connected to an air inlet pipe 33 extending to the outside of the oxidation tank 2, and the oxidation tank 2 is connected to a water injection pipe 24 and a drainage pipe 25; the oxidation tank 2 is provided with two gas transmission components respectively connected to the upper coil 21 and the lower coil 22; a stirring component is provided in the separation tank 1, and a filter screen 7 is fixed in the separation tank 1 on one side of the stirring component, and a discharge pipe 11 is connected to the side of the separation tank 1 close to the filter screen 7.

[0018] like Figure 1 and Figure 2 As shown, the top and bottom of the oxidation tank 2 are respectively fixed with electric heating rods 26 located inside the upper coil 21 and the lower coil 22. The top of the connecting shell 3 is connected to an exhaust pipe 34 that runs through the top of the oxidation tank 2. A supporting block 9 is fixed to the separation tank 1, and two supporting legs 27 are fixed to the bottom of the oxidation tank 2, which are connected to the separation tank 1 and the supporting block 9 respectively. When warm water is injected into the oxidation tank 2, the electric heating rods 26 can be turned on to keep the water temperature in the oxidation tank 2 at a temperature that is optimal for the sulfite oxidation reaction. The exhaust pipe 34 can exhaust the air in the connecting shell 3, and the supporting block 9 can increase the stability of the oxidation tank 2.

[0019] like Figure 1 、 Figure 2 and Figure 3 As shown, the gas delivery assembly includes an arcuate shell 4 fixed to the outer annular surface of the oxidation tank 2. A set of fixedly connected short tubes 41 are inserted into the side of the arcuate shell 4 connected to the oxidation tank 2. One end of the short tubes 41 is located inside the arcuate shell 4, and the other end of the short tubes 41 extends through the oxidation tank 2. The arcuate shell 4 is connected to a gas delivery pipe 42. The ends of the two sets of short tubes 41 located inside the oxidation tank 2 are respectively connected to the upper coil 21 and the lower coil 22. The gas delivery pipes 42 on the two arcuate shells 4 are respectively connected to an external air pump. When the zinc chloride raw material liquid enters the upper coil 21 or the lower coil 22, the external air pump injects air into the arcuate shell 4 through the gas delivery pipe 42. The air in the two arcuate shells 4 then enters the upper coil 21 and the lower coil 22 respectively through the two sets of short tubes 41. As the zinc chloride raw material liquid flows in the upper coil 21 or the lower coil 22, it can be fully mixed with the air, thereby facilitating a sufficient oxidation reaction of the sulfite.

[0020] like Figure 1 and Figure 5As shown, the stirring assembly includes a stirring rod 5 arranged inside the separation tank 1, a round shell 51 with a leak hole on the bottom surface is fixed to the top of the stirring rod 5, the top of the round shell 51 is connected to a vertical pipe 53 that passes through the top of the separation tank 1 and is rotatably connected to the separation tank 1, a motor 54 is fixed on the separation tank 1, a driving gear 55 is fixed on the rotating shaft of the motor 54, and a driven gear 56 that meshes with the driving gear 55 is fixed on the vertical pipe 53; a lower hopper 8 is fixed on the oxidation tank 2 through a connecting block, and the discharge end of the lower hopper 8 is inserted into the top of the vertical pipe 53. After starting the motor 54, the rotating shaft of the motor 54 can drive the driven gear 56 to rotate through the driving gear 55, so that the vertical pipe 53 starts to rotate. After the vertical pipe 53 rotates, the stirring rod 5 can be driven to rotate through the circular shell 51 to stir the raw material liquid in the separation tank 1. At the same time, barium chloride can be added into the vertical pipe 53 through the lower hopper 8, and the barium chloride then enters the circular shell 51 and is discharged through the leakage hole at the bottom of the circular shell 51, so that the barium chloride is more evenly scattered in the separation tank 1, thereby improving the mixing efficiency of the barium chloride and the raw material liquid; the filter screen 7 can block the solid precipitation, and the clear liquid containing zinc chloride enters the next reaction equipment through the discharge pipe 11.

[0021] like Figure 1 and Figure 5 As shown, the bottom of the separation tank 1 is connected to a slag discharge pipe 6. The barium ions and sulfate ions form barium sulfate precipitates, which can be collected in the depression at the bottom of the separation tank 1 (such as Figure 5 ), and then discharged through the slag discharge pipe 6.

[0022] like Figure 5 As shown, the bottom end of the circular shell 51 is connected to a set of inclined tubes 52. When the circular shell 51 rotates, the inclined tubes 52 rotate accordingly, discharging the barium chloride entering the circular shell 51 toward a location away from the axis of the separation tank 1, thereby further evenly distributing the barium chloride in the separation tank 1.

[0023] During use, warm water is first injected into the oxidation tank 2 through the water injection pipe 24, so that the temperature inside the oxidation tank 2 is more suitable for the oxidation reaction of sulfite radical. The feed end of the upper coil 21 is connected to the external pipeline conveying the zinc chloride stock liquid. After the zinc chloride stock liquid enters the upper coil 21, it is first preheated by the warm water in the oxidation tank 2. An air delivery component then injects air into the upper coil 21 to mix the air with the zinc chloride stock liquid in the upper coil 21; after the zinc chloride stock liquid enters the connecting shell 3, the external air pump inputs air into the fixed shell 32 through the air inlet pipe 33 (the top of the air inlet pipe 33 runs through the connecting shell 3 and the oxidation tank 2 in sequence), and then the air is discharged through the perforation on the fixed shell 32, so that a large amount of bubbles are formed in the connecting shell 3, so that the zinc chloride stock liquid entering the connecting shell 3 is fully Mixed with air, the degree of oxidation of sulfite by oxygen is increased, and at the same time, the two baffles 31 can extend the flow distance of the zinc chloride raw material liquid in the connecting shell 3; when the zinc chloride raw material liquid in the connecting shell 3 enters the lower coil 22, another air transmission component can also inject air into the lower coil 22, so that the zinc chloride raw material liquid passing through is fully mixed with the air. At the same time, the arrangement of the upper coil 21 and the lower coil 22 can effectively extend the flow path of the zinc chloride raw material liquid so that the sulfite can be completely desulfurized; after the subsequent zinc chloride raw material liquid enters the separation tank 1 through the discharge pipe 23, the stirring component is started and barium chloride is added to the separation tank 1, the barium chloride is stirred and mixed with the raw material liquid, and the barium ions and sulfate ions form barium sulfate precipitate, and the clear liquid containing zinc chloride passes through the filter and is discharged through the discharge pipe 11.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An impurity removal device for zinc chloride production, comprising a separation tank (1), characterized in that: An oxidation tank (2) is provided above the separation tank (1), and an upper coil (21) and a lower coil (22) are fixed in the oxidation tank (2) and are distributed in an upper and lower manner. The feed end of the upper coil (21) passes through the top of the oxidation tank (2), and the discharge end of the lower coil (22) passes through the bottom of the oxidation tank (2) and is connected to a discharge pipe (23) passing through the top of the separation tank (1); a connecting shell (3) is fixed in the oxidation tank (2) through a fixing block, and the discharge end of the upper coil (21) and the feed end of the lower coil (22) are respectively connected to the top and bottom of the connecting shell (3), and two discharge ends of the upper coil (21) and the lower coil (22) are fixed in the connecting shell (3). ) between the feed ends of the two baffles (31); a fixed shell (32) with a perforated surface and located between the two baffles (31) is fixed in the connecting shell (3); an air inlet pipe (33) extending to the outside of the oxidation tank (2) is connected to the fixed shell (32); a water injection pipe (24) and a drainage pipe (25) are connected to the oxidation tank (2); two gas transmission assemblies are provided on the oxidation tank (2) and are respectively connected to the upper coil (21) and the lower coil (22); a stirring assembly is provided in the separation tank (1); a filter screen (7) located on one side of the stirring assembly is fixed in the separation tank (1); and a discharge pipe (11) is connected to the side of the separation tank (1) close to the filter screen (7).

2. a kind of zinc chloride production impurity removal equipment according to claim 1, is characterized in that: The top and bottom of the oxidation tank (2) are respectively fixed with electric heating rods (26) located inside the upper coil (21) and the lower coil (22), and the top of the connecting shell (3) is connected to an exhaust pipe (34) that passes through the top of the oxidation tank (2); a bearing block (9) is fixed on the separation tank (1), and two supporting legs (27) are fixed on the bottom of the oxidation tank (2), which are respectively connected to the separation tank (1) and the bearing block (9).

3. a kind of zinc chloride production impurity removal equipment according to claim 1, is characterized in that: The gas transmission component comprises an arc-shaped shell (4) fixed on the outer annular surface of the oxidation tank (2); a group of fixedly connected short tubes (41) are passed through the side of the arc-shaped shell (4) connected to the oxidation tank (2); one end of the short tube (41) is located in the arc-shaped shell (4); the other end of the short tube (41) passes through the oxidation tank (2); and a gas transmission pipe (42) is connected to the arc-shaped shell (4); one end of the two groups of short tubes (41) on the two gas transmission components located in the oxidation tank (2) is respectively connected to the upper coil (21) and the lower coil (22).

4. a kind of zinc chloride production impurity removal equipment according to claim 1, is characterized in that: The stirring assembly comprises a stirring rod (5) arranged inside the separation tank (1); a circular shell (51) with a leak hole on the bottom surface is fixed to the top of the stirring rod (5); the top end of the circular shell (51) is connected to a vertical pipe (53) that penetrates the top end of the separation tank (1) and is rotatably connected to the separation tank (1); a motor (54) is fixed to the separation tank (1); a driving gear (55) is fixed to the rotating shaft of the motor (54); and a driven gear (56) meshing with the driving gear (55) is fixed to the vertical pipe (53); and a lower hopper (8) is fixed to the oxidation tank (2) via a connecting block, and the discharge end of the lower hopper (8) is inserted into the top end of the vertical pipe (53).

5. a kind of zinc chloride production impurity removal equipment according to claim 4, is characterized in that: The bottom of the separation tank (1) is connected to a slag discharge pipe (6).

6. a kind of zinc chloride production impurity removal equipment according to claim 4, is characterized in that: The bottom end of the circular shell (51) is connected to a group of inclined tubes (52) arranged in an inclined manner.

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