Device for preventing secondary crystallization of subcholafite in conveying process of salt pan old brine

Abstract

The utility model discloses a device for preventing secondary crystallization of subcholafite in the conveying process of old brine in a salt pan, which comprises a brine pipe, a brine pump connected with the brine pipe, an adsorption tower connected with the brine pump and a liquid storage tank connected with the adsorption tower, and is characterized in that an inlet of the brine pipe is connected with a subcholafite diluting device; the subchlorite diluting device comprises a diluting water tank, the diluting water tank is connected with a diluting water pipe, the diluting water pipe is connected with a diluting water pump, one end of the diluting water pipe is provided with a diluting distributor, and the diluting water pipe is fixedly connected with the brine pipe through the diluting water distributor; according to the dilution water dilution equipment provided by the device, brine crystal minerals at the inlet of the upstream brine pipeline pump are dissolved technologically, pipeline crystallization can be avoided, blockage of a subsequent system is reduced, stable operation of the equipment is ensured, and the brine conveying efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to salt lake lithium extraction structure technical field, concretely relates to a device for preventing secondary crystallization of magnesium hypochlorite in the conveying process of old brine in salt field. BACKGROUND

[0002] In the process of extracting and concentrating lithium ions in the front end of the lithium extraction industry from brine, the front end brine is pumped to the subsequent analysis and concentration equipment by pipeline pump, because the content of magnesium hypochlorite in the brine in the salt lake area exceeds 150g / L, the content of potassium chloride exceeds 50g / L, and the content of calcium chloride exceeds 10g / L. With the change of environmental temperature and liquid level, the concentration of magnesium hypochlorite, calcium chloride and other substances also changes, thereby causing magnesium hypochlorite, calcium chloride and other substances to crystallize at the inlet of the brine pipeline, which in turn affects the continuous operation of the subsequent system, and seriously affects the old brine conveying device. However, in the prior art, dilution water is mixed with brine, which causes crystallization of brine during conveying, affects the normal operation of downstream equipment during concentration and purification, and further affects the independent operation of the calcium and magnesium removal system equipment, so there is an urgent need for a device for preventing secondary crystallization of magnesium hypochlorite in the conveying process of old brine in salt field to solve the above problems. SUMMARY

[0003] The utility model aims at providing a device for preventing secondary crystallization of magnesium hypochlorite in the conveying process of old brine in salt field to solve the above problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A device for preventing secondary crystallization of magnesium hypochlorite in the conveying process of old brine in salt field, comprising a brine pipe, a brine pump connected to the brine pipe, an adsorption tower connected to the brine pump, and a liquid storage tank connected to the adsorption tower, characterized in that the inlet of the brine pipe is connected to a magnesium hypochlorite dilution device.

[0006] The magnesium hypochlorite dilution device comprises a dilution water tank, a dilution water pipe connected to the dilution water tank, a dilution water pump connected to the dilution water pipe, and a dilution distributor provided at one end of the dilution water pipe, the dilution water pipe being fixedly connected to the brine pipe through the dilution water distributor.

[0007] Preferably, the brine pipe is provided with a brine pump, and the brine pipe is provided with a brine flow regulating valve and a brine flow meter.

[0008] Preferably, the dilution water pipe is provided with a dilution water pump, and the dilution water pipe is provided with a dilution water flow regulating valve and a dilution water flow meter, and the water level of the dilution water pump is higher than that of the brine pump.

[0009] Preferably, the dilution water source is divided into two parts.

[0010] One is from the raw water tank used in production;

[0011] The second is from the concentrated water discharged by the rear-end nanofiltration system, and both parts can be controlled to freely enter water by valves.

[0012] Preferably, the dilution water distributor is located at the inlet of the brine pipe.

[0013] Preferably, the dilution water distributor comprises a base disc, one side of the base disc is provided with a water inlet connected with a dilution water pipe, the base disc is provided with a cavity penetrating through the water inlet, and the base disc is provided with a first nozzle and a second nozzle connected with the cavity.

[0014] Preferably, the first nozzle is longitudinally arranged perpendicularly to the horizontal plane where the base disc is located, the second nozzle is arranged on the inner side of the base disc, and the distance between each second nozzle is equal, so that the dilution water can be uniformly sprayed, the first nozzle is arranged in a spaced manner with the second nozzle, and the distance between each first nozzle is equal, so that the dilution water can be uniformly sprayed to the center.

[0015] Preferably, the base disc is annular, the inner diameter of the base disc is equal to the inner diameter of the brine pipe, and the base disc is in a vacuum state during the operation of the brine pump due to the negative pressure formed during pumping.

[0016] Preferably, a filter screen is arranged between the dilution water distributor and the brine pipe.

[0017] In the above technical solution, the device for preventing secondary crystallization of magnesium hypochlorite in the transportation process of old brine in a salt field provided by the present application, (1) the device for preventing secondary crystallization of magnesium hypochlorite in the transportation process of old brine in a salt field provided by the present application adjusts the dilution water valve, so that the concentration of magnesium hypochlorite and calcium chloride at the brine inlet is reduced, when the dilution water flow adjustment range is 5-20 m3 / h, the brine at the inlet will not crystallize, and the dilution water is uniformly sprayed into the brine through the dilution water distributor, which can improve the transportation efficiency of the brine, reduce the load of the brine concentration and purification equipment, and provide a prerequisite for stable operation of the subsequent calcium and magnesium removal equipment; the dilution water dilution equipment provided by the present application dissolves the brine crystalline minerals at the upstream brine pipe pump inlet in the process, and can avoid pipe crystallization, reduce subsequent system blockage, ensure stable operation of the equipment, and improve the transportation efficiency of the brine. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0019] Fig. 1 A structural schematic view provided by an embodiment of the device for preventing secondary crystallization of magnesium hypochlorite in the conveying process of old brine in a salt field.

[0020] Fig. 2 A dilution water distributor schematic view provided by an embodiment of the device for preventing secondary crystallization of magnesium hypochlorite in the conveying process of old brine in a salt field.

[0021] Fig. 3 A process diagram of the device for preventing secondary crystallization of magnesium hypochlorite in the conveying process of old brine in a salt field.

[0022] Explanation of reference signs:

[0023] 1 - brine pipe, 2 - brine pump, 3 - adsorption tower, 4 - liquid storage tank, 5 - dilution magnesium hypochlorite device, 6 - dilution water tank, 7 - dilution water pipe, 8 - dilution water pump, 9 - dilution water distributor, 10 - brine flow regulating valve, 11 - bottom disc, 12 - water inlet, 13 - first nozzle, 14 - second nozzle, 15 - filter screen, 16 - brine flow meter, 17 - dilution water flow regulating valve, 18 - dilution water flow meter, 19 - raw water tank, 20 - nanofiltration system. DETAILED DESCRIPTION

[0024] In order to make the technical personnel in the art better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the drawings.

[0025] As shown in Figs. 1-3 The embodiment of the present application provides a device for preventing secondary crystallization of magnesium hypochlorite in the conveying process of old brine in a salt field, which comprises a brine pipe 1, the brine pipe 1 is connected with a brine pump 2, the brine pump 2 is connected with an adsorption tower 3, and a liquid storage tank 4 connected with the adsorption tower 3, characterized in that the brine pipe 1 inlet is connected with a dilution magnesium hypochlorite device 5.

[0026] The dilution magnesium hypochlorite device 5 comprises a dilution water tank 6, the dilution water tank 6 is connected with a dilution water pipe 7, the dilution water pipe 7 is connected with a dilution water pump 8, one end of the dilution water pipe 7 is provided with a dilution distributor 9, and the dilution water pipe 7 is fixedly connected with the brine pipe 1 through the dilution water distributor 9.

[0027] In the embodiment, the brine pipe 1 is provided with the brine pump 2, the brine pipe 1 is provided with a brine flow regulating valve 10 and a brine flow meter 16.

[0028] In the embodiment, the dilution water pipe 7 is provided with the dilution water pump 8, the dilution water pipe 7 is provided with a dilution water flow regulating valve 17 and a dilution water flow meter 18, and the water level of the dilution water pump 8 is higher than that of the brine pump 2.

[0029] In this embodiment, the dilution water source can be divided into two parts.

[0030] One part is from the raw water tank 19 used in production;

[0031] The other part is from the concentrated water discharged by the rear-end nanofiltration system 20, both of which can be controlled to freely enter water by valves; the lithium ion content in the concentrated water is 30-50 ppm, the magnesium ion content is 5-10 g / l, and the calcium ion content is 1-2 g / l.

[0032] In this embodiment, the dilution water distributor 9 is located at the inlet of the brine pipe 1.

[0033] In this embodiment, the dilution water distributor 9 includes a bottom plate 11, one side of the bottom plate 11 is provided with a water inlet 12 connected with the dilution water pipe 7, the bottom plate 11 is provided with a cavity penetrating through the water inlet 12, and the bottom plate 11 is provided with a first nozzle 13 and a second nozzle 14 connected with the cavity.

[0034] In this embodiment, the first nozzle 13 is longitudinally arranged perpendicular to the horizontal plane where the bottom plate 11 is located; the second nozzle 14 is arranged on the inner side of the bottom plate 11, and the distance between each second nozzle 14 is equal, so that the dilution water can be uniformly sprayed; the first nozzle 13 and the second nozzle 14 are arranged at intervals, and the distance between each first nozzle 13 is equal, so that the dilution water can be uniformly sprayed to the center.

[0035] In this embodiment, the bottom plate 11 is annular, the inner diameter of the bottom plate 11 is equal to the inner diameter of the brine pipe 1, and the bottom plate 11 is in a vacuum state during the operation of the brine pump 2 due to the negative pressure formed during pumping.

[0036] In this embodiment, a filter screen 15 is arranged between the dilution water distributor 9 and the brine pipe 1.

[0037] The working process of the device is as follows:

[0038] The dilution water in the dilution water tank 6 is pumped and delivered to the dilution water distributor 9 by the dilution water pipe pump 8, the dilution water is sprayed from the first nozzle 13 and the second nozzle 14, the dilution water in the bottom plate 11 is uniformly sprayed to the filter screen 15 of the brine pipe 1 from the longitudinal and transverse directions by the first nozzle 13 and the second nozzle 14, the crystals at the inlet of the brine pipe are gradually dissolved, the crystals at the inlet of the brine pipe 1 are reduced, and the brine mixed with the dilution water is delivered to the adsorption tower 3 by the brine pump 2 for adsorption treatment, and finally delivered to the liquid storage tank 4 and sent to the rear-end nanofiltration system 20.

[0039] Embodiment 1

[0040] As Figs. 1-2 - Fig. 3As shown, the device for secondary crystallization of bischofite in the transportation process of old salt pan brine, comprising brine pipe 1, brine pump 2 connected with brine pipe 1, adsorption tower 3 connected with brine pump 2, liquid storage tank 4 connected with adsorption tower 3;

[0041] The dilution water source can be divided into two parts, one part comes from the raw water tank 19 used for production, and the other part comes from the water sent by the rear nanofiltration system 20, both of which can be controlled by valves to freely enter water.

[0042] The dilution bischofite device 5 includes a dilution water tank, including a dilution water tank 6, the dilution water tank is a water tank with a volume of 5-20 m3, used to store 5-20 m3 of dilution water liquid, the dilution water tank 6 is made of PP material, the dilution water tank 6 is connected with a dilution water pipe 7, the dilution water pipe 7 is used to transport the dilution water in the dilution water tank 6 to the dilution water distributor 9 through the dilution water pipe pump 8, the pipe diameter is DN25-DN80 mm, the pipe material is selected according to the PH value of the dilution water, the dilution water pipe 7 is fixedly connected with the brine pipe 1 through the dilution water distributor 9, the dilution water distributor 9 is arranged at the inlet of the brine pipe 1, and a filter screen 15 is arranged between the dilution water distributor 9 and the brine pipe 1. The dilution water pipe 7 is provided with a dilution water pump 8, the brine pipe 1 is provided with a brine pump 2, the water level of the dilution water pump 8 is higher than that of the brine pump 2, the dilution water pipe pump 8 and the brine pump 2, the brine pipe 1 is provided with a brine flow regulating valve 10 and a brine flow meter 16. The dilution water pipe 7 is provided with a dilution water flow regulating valve 17 and a dilution water flow meter 18. The dilution water pump 8 transports the dilution water in the dilution water tank 6 to the dilution water distributor 9 through pressurization, the lift is 10-45 meters, and the flow is 20-70 m3 / h.

[0043] The dilution water distributor 9 comprises a bottom disc 11, the bottom disc 11 is annular, the inner diameter of the bottom disc 11 is equal to the inner diameter of the brine pipe 1, the bottom disc 11 is provided with a water inlet 12 on one side, the water inlet 12 is connected with the dilution water pipe 7, the bottom disc 11 is provided with a cavity which is through the water inlet 12, the bottom disc 11 is provided with a first nozzle 13 and a second nozzle 14 which are connected with the cavity, the first nozzle 13 is longitudinally arranged perpendicularly to the horizontal plane where the bottom disc 11 is located, the second nozzle 14 is arranged on the inner side of the bottom disc 11, the first nozzle 13 and the second nozzle 14 are arranged from two directions, which can help to spray the dilution water to the inlet of the brine pipe 1 uniformly, so that the dilution crystallization effect is better, the first nozzle 13 and the second nozzle 14 are arranged at intervals, the dilution water distributor 9 is a bent pipe ring plus nozzle structure, the dilution water in the bottom disc 11 is sprayed to the filter screen 15 of the brine pipe 1 from the longitudinal direction and the transverse direction through the first nozzle 13 and the second nozzle 14. The nominal diameter of the bottom disc 11 is DN25-DN80mm, the nominal diameter of the first nozzle 13 and the second nozzle 14 is DN12-DN32mm. And during the operation of the brine pump 2, because the negative pressure is formed in the pipe, the bottom disc is in a vacuum state, so the bottom disc and the nozzle of the device will not produce crystallization.

[0044] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the present application.

Claims

1. A device for preventing secondary crystallization of magnesium hypochlorite during the transportation of old brine from salt fields, comprising a brine pipe (1), a brine pump (2) connected to the brine pipe (1), an adsorption tower (3) connected to the brine pump (2), and a storage tank (4) connected to the adsorption tower (3), characterized in that, The brine pipe (1) is connected to a device (5) for diluting magnesium chloride at its inlet; The dilution device (5) for magnesium hypochlorite includes a dilution water tank (6), which is connected to a dilution water pipe (7). The dilution water pipe (7) is connected to a dilution water pump (8). A dilution distributor (9) is provided at one end of the dilution water pipe (7), and the dilution water pipe (7) is fixedly connected to the brine pipe (1) through the dilution water distributor (9).

2. The device for preventing secondary crystallization of magnesium hypochlorite during the transportation of old brine from salt fields according to claim 1, characterized in that, The brine pipe (1) is equipped with a brine pump (2), a brine flow regulating valve (10), and a brine flow meter (16).

3. The device for preventing secondary crystallization of magnesium hypochlorite during the transportation of old brine from salt fields according to claim 2, characterized in that, The dilution water pipe (7) is equipped with a dilution water pump (8), and the dilution water pipe (7) has a dilution water flow regulating valve (17) and a dilution water flow meter (18). The water level of the dilution water pump (8) is higher than that of the brine pump (2).

4. The device for preventing secondary crystallization of magnesium hypochlorite during the transportation of old brine from salt fields according to claim 3, characterized in that, It also includes the source of the dilution water, which can be divided into two parts; Firstly, it comes from the raw water tank used in production (19); The second source is the concentrated water discharged from the downstream nanofiltration system (20). Both parts can be freely fed by valves.

5. The device for preventing secondary crystallization of magnesium hypochlorite during the transportation of old brine from salt fields according to claim 4, characterized in that, The dilution water distributor (9) is located at the inlet of the brine pipe (1).

6. The device for preventing secondary crystallization of magnesium hypochlorite during the transportation of old brine from salt fields according to claim 5, characterized in that, The dilution water distributor (9) includes a chassis (11), an inlet (12) is provided on one side of the chassis (11), the inlet (12) is connected to the dilution water pipe (7), the chassis (11) has a cavity that communicates with the inlet (12), and the chassis (11) has a first nozzle (13) and a second nozzle (14) that are connected to the cavity.

7. The device for preventing secondary crystallization of magnesium hypochlorite during the transportation of old brine from salt fields according to claim 6, characterized in that, The first nozzle (13) is arranged vertically perpendicular to the horizontal plane where the chassis (11) is located; the second nozzle (14) is arranged on the inner side of the chassis (11), and the distance between each second nozzle (14) is equal, so that dilution water can be sprayed evenly; the first nozzle (13) and the second nozzle (14) are arranged at intervals, and the distance between each first nozzle (13) is equal, so that dilution water can be sprayed evenly to the center.

8. The device for preventing secondary crystallization of magnesium hypochlorite during the transportation of old brine from salt fields according to claim 7, characterized in that, The chassis (11) is annular, and the inner diameter of the chassis (11) is equal to the inner diameter of the brine pipe (1). During operation, the brine pump (2) creates a vacuum state in the chassis (11) due to the negative pressure generated during pumping.

9. The device for preventing secondary crystallization of magnesium hypochlorite during the transportation of old brine from salt fields according to claim 8, characterized in that, A filter screen (15) is provided between the dilution water distributor (9) and the brine pipe (1).

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