Extraction tank with demulsification device

Abstract

The utility model discloses an extraction tank with a demulsification device, which comprises a mixing chamber and a clarifying chamber, and is characterized in that the demulsification device consists of a flow baffle and an overflow plate; the overflow plate is arranged between the mixing chamber and the clarifying chamber, and the flow baffle is arranged in the clarifying chamber; an oleophylic and hydrophobic layer is arranged on the bottom surface of the flow baffle or a hydrophilic and oleophobic layer is arranged on the surface of the flow baffle; a hydrophilic oleophobic layer is arranged on the surface of one side, facing the clarifying chamber, of the overflow plate; through two-step demulsification, rapid separation of water and oil can be realized, and the separation effect is good; the structure and the volume of the extraction tank are not changed, and the production efficiency is not influenced; a physical source influencing the performance of a chemical reagent or an extraction agent of an extraction system is not introduced, and no post-treatment burden exists; the device is simple, and labor cost, large equipment cost and occupied area are not increased.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment, and more specifically, relates to an extraction tank with a demulsification device. Background Art

[0002] Solvent extraction separation is often used to enrich and separate rare earth elements, precious metal elements and other metal elements. Emulsification often occurs in this process. In industry, the methods for oil-water separation after emulsification include gravity sedimentation, heating, chemical treatment, centrifugation, ultrasound or high-voltage pulse electrostatic method, and filtration. Among them, gravity sedimentation takes a long time or requires a large clarification tank.

[0003] Heating method; for example, the utility model patent "A multifunctional environmentally friendly mixed clarification extraction tank" with patent number 202021729943.5 discloses a tank body, a mixing chamber, an observation chamber, a clarification chamber, a water phase partition tank and a heat exchange chamber. A total feed pipe is provided at the lower end of the left side of the tank body, and the total feed pipe is connected to the water phase feed pipe and the oil phase feed pipe through a tee respectively. A water phase discharge pipe is provided at the upper end of the right side of the tank body, and an oil phase discharge pipe is provided at the right end of the front side of the tank body. The utility model provides a baffle hole, a stirrer, a baffle block and a demulsification hole, so that the oil-water mixture can be more uniform and the emulsified oil mass can be broken up; by providing a water phase partition tank, the water phase after the oil-water separation can be further clarified and separated from the oil and water, thereby improving the oil-water separation effect; by providing a heat exchange chamber, the observation chamber, the clarification chamber and the water phase partition tank are kept at a constant temperature, so that the extraction tank can be used uninterruptedly throughout the year and the extraction shutdown due to crystallization is prevented; the heat exchange chamber is provided, and the demulsification is performed by a heating method, but the heating method affects the life of the organic phase and is prone to volatilization.

[0004] Chemical treatment requires the addition of demulsifiers or stabilizers, which pollutes the extraction system and increases the burden of subsequent liquid treatment.

[0005] The centrifugal method utilizes the difference in density between the two phases to promote the separation of the two phases through the action of centrifugal force. During the extraction process, the density difference between the two phases gradually decreases, and the centrifugation of the two phases with a small density difference aggravates the emulsification phenomenon.

[0006] Ultrasonic or high-voltage pulse electrostatic method and filtration method all require the emulsion to be transferred to other devices for separation, which is incompatible with the continuous multi-stage large-flow production mode. Utility Model Content

[0007] In order to solve the above-mentioned technical problems, the utility model discloses an extraction tank with an emulsion breaking device.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] An extraction tank with a demulsification device, the extraction tank comprises a mixing chamber and a clarifying chamber, the demulsification device consists of a baffle plate and an overflow plate; the overflow plate is arranged between the mixing chamber and the clarifying chamber, and the baffle plate is arranged in the clarifying chamber; an oleophilic and hydrophobic layer is arranged on the bottom surface of the baffle plate or a hydrophilic and oleophobic layer is arranged on the surface of the baffle plate; and a hydrophilic and oleophobic layer is arranged on the surface of the overflow plate facing the clarifying chamber.

[0010] The utility model discloses a demulsification device for an extraction tank, wherein the baffle plate and the overflow plate are perpendicular to each other in different planes.

[0011] The utility model discloses a demulsification device for an extraction tank, wherein the baffle plate is provided with water permeable holes.

[0012] The utility model discloses a demulsification device for an extraction tank. The diameter of the water permeable hole is 2-15 mm, and the hole area accounts for 1 / 2 to 2 / 3 of the area of ​​the baffle plate.

[0013] Through the above arrangement: more preferably, the closer the water permeable holes are to the liquid outlet, the smaller the aperture is, the greater the number is, and the better the demulsification effect is.

[0014] The utility model discloses a demulsification device for an extraction tank. The baffle plate is fixed on one side of a liquid outlet in a clarification chamber of the extraction tank by a bracket or a pin connection.

[0015] The utility model discloses a demulsification device for an extraction tank, wherein the overflow plate is welded in the extraction tank.

[0016] The utility model discloses a demulsification device for an extraction tank, wherein the overflow plate and the baffle plate are surface-modified to make their surfaces hydrophilic and oleophobic or oleophilic and hydrophobic; or the surfaces of the overflow plate and the baffle plate are coated or clad with a hydrophilic and oleophobic film or an oleophilic and hydrophobic film; or the surfaces of the overflow plate and the baffle plate are welded with a hydrophilic and oleophobic layer or an oleophilic and hydrophobic layer.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. After two-step demulsification, water and oil can be separated quickly with good separation effect.

[0019] 2. The structure and volume of the extraction tank will not be changed, and the production efficiency will not be affected.

[0020] 3. No chemical reagents or physical sources that affect the performance of the extraction system or the extractant are introduced, and there is no post-processing burden.

[0021] 4. The device is simple and does not increase labor costs, large equipment costs or land occupation.

[0022] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following is a brief description of the contents and symbols in the drawings of this specification:

[0024] Figure 1 It is a schematic diagram of the utility model;

[0025] Marked in the figure: 1, mixing chamber; 2, clarifying chamber; 3, overflow plate; 4, baffle plate; 5, mixed liquid; 6, oil phase layer; 7, water phase layer. DETAILED DESCRIPTION

[0026] The following, with reference to the accompanying drawings, describes the embodiments and further explains the specific implementation methods of the utility model, such as the shapes and structures of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, the manufacturing process and the operation and use methods, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution of the utility model.

[0027] like Figure 1 The extractor tank with a demulsification device shown in the figure comprises a mixing chamber 1 and a clarifying chamber 2, and the demulsification device is composed of a baffle plate 4 and an overflow plate 3; the overflow plate 3 is arranged between the mixing chamber 1 and the clarifying chamber 2, and the baffle plate 4 is arranged in the clarifying chamber 2; the bottom surface of the baffle plate 4 is provided with an oleophilic and hydrophobic layer or the surface of the baffle plate 4 is provided with a hydrophilic and oleophobic layer; the surface of the overflow plate 3 facing the clarifying chamber 2 is provided with a hydrophilic and oleophobic layer; the baffle plate 4 is perpendicular to the overflow plate 3 on different planes; the baffle plate 4 is provided with a water permeable hole; the water permeable hole The diameter is 2-15mm, and the hole area accounts for 1 / 2 to 2 / 3 of the baffle area; the baffle 4 is fixed to the liquid outlet side of the clarification chamber 2 of the extraction tank by a bracket or a pin connection; the overflow plate 3 is welded in the extraction tank; the overflow plate 3 and the baffle 4 are surface-modified to make their surfaces hydrophilic and oleophobic or oleophilic and hydrophobic; or the surfaces of the overflow plate 3 and the baffle 4 are coated or clad with a hydrophilic and oleophobic film or an oleophilic and hydrophobic film; or the surfaces of the overflow plate 3 and the baffle 4 are welded with a hydrophilic and oleophobic layer or an oleophilic and hydrophobic layer.

[0028] Working principle and method

[0029] The utility model improves the overflow plate 3 so that the side of the overflow plate 3 facing the clarification chamber 2 is a hydrophilic and oleophobic layer. After the mixed liquid 5 overflows, the oil phase is repelled and gathered in the upper layer, and the water phase gathers in the lower layer along the overflow plate 3 under the action of gravity. The emulsified phase that is not separated after the initial demulsification will gather at the interface of the two phases. The clarification chamber 2 is provided with a transverse baffle 3, and the bottom surface of the baffle 3 is an oleophilic and hydrophobic layer or the surface is a hydrophilic and oleophobic layer. If the emulsified phase is an oil-in-water type, the baffle 3 can be arranged at the upper part of the interface of the two phases, and the emulsified phase encounters the bottom surface of the baffle 3 during the floating process of the upper layer, and the oil phase goes up along the bottom surface of the baffle 3 along the hole, and the water phase is repelled downward; if the emulsified phase is an oil-in-water type, the baffle 3 can be arranged at the lower part of the interface of the two phases, and the emulsified phase encounters the surface of the baffle 3 during the floating process of the lower layer, and the water phase goes down along the top surface of the baffle 3 along the hole, and the oil phase is repelled upward.

[0030] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An extraction tank equipped with a demulsifier, the extraction tank comprising a mixing chamber and a clarifying chamber, characterized in that: The demulsification device consists of a baffle and an overflow plate; the overflow plate is arranged between the mixing chamber and the clarifying chamber, and the baffle is arranged in the clarifying chamber; an oleophilic and hydrophobic layer is arranged on the bottom surface of the baffle or a hydrophilic and oleophobic layer is arranged on the surface of the baffle; and a hydrophilic and oleophobic layer is arranged on the surface of the overflow plate facing the clarifying chamber.

2. The extraction tank with demulsification device according to claim 1, characterized in that: The baffle plate is perpendicular to the overflow plate in different planes.

3. The extraction tank equipped with an emulsion breaking device according to claim 1, characterized in that: The baffle plate is provided with water permeable holes.

4. The extraction tank equipped with an emulsion breaking device according to claim 3, characterized in that: The water-permeable hole has a diameter of 2-15 mm, and the hole area accounts for 1 / 2-2 / 3 of the baffle area.

5. The extraction tank equipped with an emulsion breaking device according to claim 1, characterized in that: The baffle is fixed on one side of the liquid outlet in the clarification chamber of the extraction tank by means of a bracket or a pin connection.

6. The extraction tank equipped with an emulsion breaking device according to claim 1, characterized in that: The overflow plate is welded in the extraction tank.

7. The extraction tank equipped with an emulsion breaking device according to claim 1, characterized in that: The overflow plate and the baffle plate are surface-modified to make their surfaces hydrophilic and oleophobic or oleophilic and hydrophobic; or the surfaces of the overflow plate and the baffle plate are coated or clad with a hydrophilic and oleophobic film or an oleophilic and hydrophobic film; or the surfaces of the overflow plate and the baffle plate are welded with a hydrophilic and oleophobic layer or an oleophilic and hydrophobic layer.

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