A chemical oil removal device for raffinate

Abstract

This invention provides a chemical oil removal device for raffinate, comprising an oil removal tank, above which are connected nickel sulfate solution and steam pipelines. A level gauge and a mixer are located at the top of the oil removal tank. A first sodium persulfate preparation tank and a second sodium persulfate preparation tank are connected to the side of the mixer. The first sodium persulfate preparation tank is equipped with a first sodium persulfate delivery pump, and the second sodium persulfate preparation tank is equipped with a second sodium persulfate delivery pump. The mixer is connected to the oil removal tank, the nickel sulfate solution pipeline, the first sodium persulfate delivery pump, and the second sodium persulfate delivery pump. This invention can adjust the valve to control the flow rate according to the oil content of the system, achieving satisfactory oil removal while maximizing reagent mixing and improving reagent utilization efficiency, thereby reducing system production costs. It is easy to operate and highly practical.

Description

Technical Field

[0001] This utility model belongs to the field of hydrometallurgical technology and relates to a chemical degreasing device for raffinate. Background Technology

[0002] During solvent extraction, oil in the aqueous phase generally exists in states such as suspension, dispersion, emulsification, and dissolution. Among these, suspended oil typically has a particle size greater than 100 μm, easily floats to the surface of the aqueous phase, and is readily separated and removed. Dispersed oil has a particle size between 10 and 100 μm, often suspended in the aqueous phase as tiny oil droplets, and is unstable, agglomerating into floating oil upon settling. Emulsified oil has a particle size less than 10 μm, typically between 0.1 and 2 μm, with a stable interfacial film forming a double-electron-layer structure, resulting in fewer collisions between oil particles, strong stability, and making oil-water separation more difficult. Dissolved oil has a particle size even smaller than emulsified oil, dissolving in water down to the nanometer scale. Currently, physical separation is possible for suspended oil, dispersed oil, and emulsified oil, while dissolved oil cannot be separated using general physical methods.

[0003] The principle of chemical oil removal is to use advanced oxidation technology, which refers to a series of chemical oxidation technologies that use hydroxyl radicals to remove organic pollutants from wastewater. Because it can generate highly active free radicals, it has a wide range of adaptability to the degradation of organic matter, a fast degradation rate, and is inexpensive, chemical oil removal is widely used in the treatment of wastewater containing organic matter.

[0004] The existing raffinate oil removal system has the following problems: 1. The flow rates of sodium persulfate solution and primary oil removal solution are 20~25m³. 3 / h and 0.2~0.3m 3 1. The flow rates of the two components differ significantly, resulting in unstable mixing uniformity within the oil removal reaction tank. 2. The lack of a level indicator in the reaction tank leads to poor level stability and large fluctuations in reaction time due to fluctuations in the inlet and outlet flow rates. 3. The manual control of the reaction tank heating causes significant temperature fluctuations when the flow rate and level fluctuate, thus affecting the activation effect of sodium persulfate. All of these factors contribute to unstable oil removal performance. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a chemical oil removal device for raffinate, which solves the problem of unstable oil removal effect in existing raffinate oil removal systems.

[0006] Therefore, the present invention adopts the following technical solution:

[0007] A chemical oil removal device for raffinate includes an oil removal tank, with a nickel sulfate solution pipeline and a steam pipeline connected to the oil removal tank above it, and a level gauge and a pipeline mixer at the top of the oil removal tank.

[0008] The side of the pipeline mixer is provided with a first sodium persulfate preparation tank and a second sodium persulfate preparation tank connected thereto. The first sodium persulfate preparation tank is provided with a first sodium persulfate delivery pump, and the second sodium persulfate preparation tank is provided with a second sodium persulfate delivery pump. The mixer is connected to an oil removal tank, a nickel sulfate solution pipeline, the first sodium persulfate delivery pump and the second sodium persulfate delivery pump, respectively.

[0009] The side of the degreasing tank is provided with a pure nickel sulfate solution conveying pipeline, and a first pure nickel sulfate conveying pump and a second pure nickel sulfate conveying pump are connected in parallel between the two.

[0010] Furthermore, a sodium persulfate flow meter is installed on the pipeline connecting the mixer to the first sodium persulfate preparation tank.

[0011] Furthermore, the degreasing tank is equipped with a degreasing tank outlet thermometer.

[0012] Furthermore, the oil-containing nickel sulfate solution pipeline is equipped with an oil-containing nickel sulfate flow meter.

[0013] Furthermore, the steam pipeline is equipped with a steam flow meter.

[0014] Furthermore, the pure nickel sulfate solution delivery pipeline is equipped with a pure nickel sulfate solution flow meter.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention can adjust the flow rate of the flow meter by adjusting the valve according to the different oil contents of the system, and accurately control the temperature, reaction time and enhanced mixing method of the oil removal reaction to achieve a fast, efficient, green and low-energy oil removal effect. It can also maximize the mixing degree of the reagent and improve the utilization efficiency of the reagent, thereby reducing the production cost of the system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram, 1-Steam flow meter for the oil removal tank, 2-Oil-containing nickel sulfate flow meter, 3-Level gauge, 4-Pipeline mixer, 5-Oil removal tank outlet thermometer, 6-Sodium persulfate flow meter, 7-Oil removal tank, 8-First sodium persulfate preparation tank, 9-First sodium persulfate transfer pump, 10-Second sodium persulfate transfer pump, 11-Second sodium persulfate preparation tank, 12-First pure nickel sulfate transfer pump, 13-Second pure nickel sulfate transfer pump, 14-Pure nickel sulfate solution flow meter, 15-Oil-containing nickel sulfate solution pipeline, 16-Steam pipeline, 17-Steam regulating valve, 18-Oil-containing nickel sulfate solution valve, 19-Sodium persulfate solution valve, 20-First pure nickel sulfate solution valve, 21-Second pure nickel sulfate solution valve, 22-First sodium persulfate solution valve 23-First sodium persulfate transfer pump circulation pipe valve, 24-First sodium persulfate preparation tank valve, 25-First sodium persulfate transfer pump inlet valve, 26-First sodium persulfate transfer pump outlet valve, 27-Second sodium persulfate transfer pump circulation pipe valve, 28-Second sodium persulfate transfer pipe valve, 29-Second sodium persulfate preparation tank valve, 30-Second sodium persulfate transfer pump inlet valve, 31-Second sodium persulfate transfer pump outlet valve, 32-First pure nickel sulfate solution transfer pump outlet valve, 33-First pure nickel sulfate solution transfer pump inlet valve, 34-Second pure nickel sulfate solution transfer pump outlet valve, 35-Second pure nickel sulfate solution transfer pump inlet valve, 36-Pure nickel sulfate solution transfer pipeline. Detailed Implementation

[0019] The technical solution of this utility model will be described below with reference to the accompanying drawings and implementation methods.

[0020] like Figure 1 As shown, a chemical oil removal device for raffinate includes an oil removal tank 7, an oil removal tank outlet thermometer 5, and an oil-containing nickel sulfate solution pipeline 15 and a steam pipeline 16 connected to the oil removal tank 7.

[0021] The steam pipeline 16 is equipped with a steam flow meter 1 for entering the oil removal tank. By adjusting the steam regulating valve 17 on the steam pipeline 16, the temperature of the liquid in the oil removal tank can be precisely controlled, thereby eliminating the influence of temperature fluctuations on the oil removal effect and effectively improving the utilization rate of steam to achieve low energy consumption of the equipment.

[0022] The degreasing tank 7 is equipped with a level gauge 3, which ensures that the liquid level in the tank remains stable, thereby effectively guaranteeing the residence time of the solution in the tank and thus ensuring the reaction time for degreasing.

[0023] The degreasing tank 7 is equipped with a pipeline mixer 4, which has several spiral blades. The pipeline mixer 4 is connected to the oil-containing nickel sulfate solution management 15, the first sodium persulfate preparation tank 8, and the second sodium persulfate preparation tank 11. The first sodium persulfate preparation tank 8 and the second sodium persulfate preparation tank 11 are arranged in parallel, and the pipeline connecting the pipeline mixer 4 to the first sodium persulfate preparation tank 8 and the second sodium persulfate preparation tank 11 is equipped with a sodium persulfate solution valve 19.

[0024] When sodium persulfate and oil-containing nickel sulfate solution enter the pipeline mixer 4, the fluid passes through the spiral blades inside the pipeline, causing the two solutions to change their flow direction and creating turbulence, thereby improving the mixing efficiency. Without the need for external energy, the nickel sulfate solution and sodium persulfate solution can be uniformly mixed before entering the degreasing tank 7.

[0025] The nickel sulfate solution pipeline 15 is equipped with a nickel sulfate flow meter 2, and the supply flow is stabilized through the oil-containing nickel sulfate solution valve 18.

[0026] The continuous supply system for sodium persulfate solution is implemented with one standby and one in use. It includes a first sodium persulfate preparation tank 8 and a second sodium persulfate preparation tank 11. The first sodium persulfate preparation tank 8 is equipped with a first sodium persulfate transfer pump 9, and the second sodium persulfate preparation tank 11 is equipped with a second sodium persulfate transfer pump 10. The outlets of the first sodium persulfate transfer pump 9 and the second sodium persulfate transfer pump 10 are connected by a three-way parallel connection pipeline equipped with a sodium persulfate flow meter 6.

[0027] The pipeline connecting the first sodium persulfate preparation tank 8 and the first sodium persulfate delivery pump 9 is equipped with a first sodium persulfate preparation tank valve 24 and a first sodium persulfate delivery pump inlet valve 25. The pipeline connecting the first sodium persulfate delivery pump 9 and the sodium persulfate solution valve 19 is equipped with a first sodium persulfate delivery pump outlet valve 26 and a first sodium persulfate delivery pipe valve 23. The pipeline connecting the first sodium persulfate preparation tank 8 and the first sodium persulfate delivery pipe valve 23 is equipped with a first sodium persulfate delivery pump circulation pipe valve 22.

[0028] The pipeline connecting the second sodium persulfate preparation tank 11 and the second sodium persulfate delivery pump 10 is equipped with a second sodium persulfate delivery pump inlet valve 30 and a second sodium persulfate delivery pump outlet valve 31. The pipeline connecting the second sodium persulfate delivery pump 10 and the sodium persulfate solution valve 19 is equipped with a second sodium persulfate preparation tank valve 29 and a second sodium persulfate delivery pipe valve 28. The pipeline connecting the second sodium persulfate preparation tank 11 and the second sodium persulfate delivery pipe valve 28 is equipped with a second sodium persulfate delivery pump circulation pipe valve 27.

[0029] The preparation process of the sodium persulfate solution in the first sodium persulfate preparation tank 8 is as follows:

[0030] Add the calculated sodium persulfate solid to the first sodium persulfate preparation tank 8, add water to the fixed position, open the valve 24 of the first sodium persulfate preparation tank, the inlet valve 25 of the first sodium persulfate delivery pump, the circulation pipe valve 22 of the first sodium persulfate delivery pump, and the outlet valve 26 of the first sodium persulfate delivery pump, close the valve 23 of the first sodium persulfate delivery pipe, turn on the motor of the first sodium persulfate delivery pump 9, and after continuous circulation for 1 hour, the solution is prepared and ready for use.

[0031] The preparation process of the sodium persulfate solution in the second sodium persulfate preparation tank 11 is as follows:

[0032] Add the calculated sodium persulfate solid to the second sodium persulfate preparation tank 11, add water to the fixed position of the preparation tank, open the inlet valve 30, outlet valve 31, circulation pipe valve 27, and preparation tank valve 29 of the second sodium persulfate delivery pump, close the second sodium persulfate delivery pipe valve 28, turn on the motor of the first sodium persulfate delivery pump 9, and circulate continuously for 1 hour. The solution is then ready for use.

[0033] The side of the degreasing tank 7 is provided with a pure nickel sulfate solution conveying pipe 36, and a first nickel sulfate conveying pump 12 and a second nickel sulfate conveying pump 13 are arranged in parallel between the two; wherein, a second pure nickel sulfate solution valve 21 is provided on the pipe connecting the degreasing tank 7 and the first nickel sulfate conveying pump 12, and a first pure nickel sulfate solution valve 20 is provided on the pipe connecting the degreasing tank 7 and the second nickel sulfate conveying pump 13.

[0034] The pure nickel sulfate solution conveying pipeline 36 is equipped with a pure nickel sulfate solution flow meter 14; the inlet and outlet of the first nickel sulfate conveying pump 12 are respectively equipped with a first pure nickel sulfate solution conveying pump outlet valve 32 and a first pure nickel sulfate solution conveying pump inlet valve 33, and the inlet and outlet of the second nickel sulfate conveying pump 13 are respectively equipped with a second pure nickel sulfate solution conveying pump outlet valve 34 and a second pure nickel sulfate solution conveying pump inlet valve 35.

[0035] The usage process of this utility model is as follows:

[0036] First, prepare the sodium persulfate solution. Turn on the supply systems for both the nickel sulfate solution and the sodium persulfate solution. Adjust the flow rates of both solutions to the target values ​​using regulating valves. After mixing in the pipeline mixer 4, the two solutions enter the oil removal tank 7. Adjust the steam regulating valve 17 to bring the solution in the tank to the specified temperature. When the solution level exceeds the level of the stirring paddle, turn on the stirring system in the oil removal tank 7. When the solution reaches the specified level, turn on the first pure nickel sulfate delivery pump 12 or the second pure nickel sulfate delivery pump 13 at the bottom of the oil removal tank. Adjust the corresponding outlet valve 32 of the first pure nickel sulfate solution delivery pump or the outlet valve of the second pure nickel sulfate solution delivery pump to bring the flow rate to the set value, thereby ensuring the stability of the liquid level in the oil removal tank 7.

Claims

1. A chemical deoiling device for raffinate, characterized by, It includes an oil removal tank (7), above which is provided an oil-containing nickel sulfate solution pipeline (15) and a steam pipeline (16) connected to it, and at the top of the oil removal tank (7) are a level gauge (3) and a pipeline mixer (4); The pipeline mixer (4) is provided with a first sodium persulfate preparation tank (8) and a second sodium persulfate preparation tank (11) connected to it. The first sodium persulfate preparation tank (8) is provided with a first sodium persulfate delivery pump (9), and the second sodium persulfate preparation tank (11) is provided with a second sodium persulfate delivery pump (10). The pipeline mixer (4) is connected to the degreasing tank (7), the nickel sulfate solution pipeline (15), the first sodium persulfate delivery pump (9), and the second sodium persulfate delivery pump (10), respectively. The side of the degreasing tank (7) is provided with a pure nickel sulfate solution conveying pipe (36), and a first pure nickel sulfate conveying pump (12) and a second pure nickel sulfate conveying pump (13) are provided in parallel between the two.

2. The chemical deoiling device for raffinate according to claim 1, characterized in that, A sodium persulfate flow meter (6) is installed on the pipeline connecting the pipeline mixer (4) and the first sodium persulfate preparation tank (8).

3. The chemical deoiling device for raffinate according to claim 1, characterized in that, The degreasing tank (7) is equipped with a degreasing tank outlet thermometer (5).

4. The chemical deoiling device for raffinate according to claim 1, characterized in that, The oil-containing nickel sulfate solution pipeline (15) is equipped with an oil-containing nickel sulfate flow meter (2).

5. The chemical deoiling device for raffinate according to claim 1, characterized in that, The steam pipeline (16) is equipped with a steam flow meter (1).

6. The chemical deoiling device for raffinate according to claim 1, characterized in that, The pure nickel sulfate solution conveying pipeline (36) is equipped with a pure nickel sulfate solution flow meter (14).

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