Water washing membrane separation device for production of isooctyl nitrate

Abstract

The utility model discloses a water washing membrane separation device for production of isooctyl nitrate, which relates to the technical field of production of isooctyl nitrate and comprises an oil phase separator, a water phase settler and a fiber membrane contactor, the device is characterized in that the cross sections of the oil-phase separator and the water-phase settler are rectangular, distributed speed regulating mechanisms are arranged between the inner walls of the left and right opposite sides of the oil-phase separator and the water-phase settler, and channels are formed between the front and rear sides and the inner walls of the two groups of distributed speed regulating mechanisms; the oil phase separator and the water phase settler are respectively provided with a feeding pipe for feeding distilled water and isooctyl nitrate into the distribution speed regulating mechanism; the flow velocity of the isooctyl nitrate and the water is regulated by the distribution speed regulation mechanism, and the production efficiency can be improved and the production yield can be increased while the washing effect is ensured by optimizing the flow velocity; the water washing time can be shortened through the appropriate flow speed, the energy consumption and the labor cost are reduced, the overall production benefit is improved, and meanwhile it can be guaranteed that isooctyl nitrate and water can make full and even contact through the evenly-dispersed discharging mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitric acid isooctyl ester production technical field, concretely relates to a kind of water washing membrane separation device for nitric acid isooctyl ester production. BACKGROUND

[0002] In the production process of nitric acid isooctyl ester, the reaction product can contain unreacted acid, base and some water-soluble byproducts. Water washing can dissolve these impurities in water, thereby separating from nitric acid isooctyl ester and improving the purity of the product; at the same time, the pH value of nitric acid isooctyl ester reaches a certain range, meeting the product quality requirements, preventing the stability and performance of the product from being affected by acidity and alkalinity during storage and use.

[0003] The appropriate flow rate can allow nitric acid isooctyl ester to fully contact with water, making the mass transfer process between the two phases more efficient. If the flow rate is too slow, although the contact time of nitric acid isooctyl ester and water is long, the total amount of substances participating in mass transfer per unit time is limited, and the impurity removal efficiency is low. If the flow rate is too fast, the contact time of the two is too short, and the mass transfer is insufficient, which also affects the impurity removal effect and can cause nitric acid isooctyl ester to emulsify, making subsequent separation difficult and affecting the purity and quality of the product. Therefore, by adjusting the flow rate, the best balance point of mass transfer effect can be found, the water washing efficiency is improved, and the impurities in nitric acid isooctyl ester are better removed. SUMMARY

[0004] The utility model aims at providing a kind of water washing membrane separation device for nitric acid isooctyl ester production, to solve the problem of low water washing efficiency in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a kind of water washing membrane separation device for nitric acid isooctyl ester production, including oil phase separator, water phase settler and fiber membrane contactor, the top of the oil phase separator is provided with oil phase outlet, the bottom of the water phase settler is provided with water phase outlet, the bottom of the oil phase separator is sealedly connected with the top of fiber membrane contactor, the top of the water phase settler is sealedly connected with the bottom of the tube wall of fiber membrane contactor, distribution speed regulation mechanism is arranged between the left and right opposite inner walls of the transverse section of the oil phase separator and water phase settler, which is rectangular, and the passage is formed between the inner wall and the front and back sides of the two groups of distribution speed regulation mechanism, the oil phase separator and water phase settler are respectively provided with feed pipe for entering distribution speed regulation mechanism for distilled water and nitric acid isooctyl ester.

[0006] Further, the distribution speed regulation mechanism comprises a cylinder rotationally connected between the opposite two side inner walls and a sleeve sleeved outside the cylinder and fixedly connected between the opposite two side inner walls, a plurality of uniformly distributed through holes are formed in the side wall of the sleeve towards the fiber membrane contactor side, a plurality of uniformly distributed and corresponding to the through holes adjusting holes are formed in the cylinder side wall, the cylinder outer wall is tightly matched with the sleeve inner wall and is in sliding connection, the two feeding pipes are respectively penetrated through the side walls of the oil phase separator and the water phase settler and are rotationally installed, the feeding pipes are coaxially arranged with the cylinder and are in communication with each other, and the feeding pipes are integrally formed.

[0007] Further, the oil phase separator and the water phase settler are both fixedly provided with a stepping motor on the side wall, the output shaft of the stepping motor is fixedly connected with one end of the cylinder away from the feeding pipe, and the cylinder is driven to rotate.

[0008] Further, the water phase settler is provided with a wire mesh filler, and the wire mesh filler is a hydrophilic stainless steel wire mesh.

[0009] The utility model has the following beneficial effects:

[0010] The utility model provides a water washing membrane separation device for isooctyl nitrate production, through the distribution speed regulation mechanism arranged, can adjust the flow velocity of isooctyl nitrate and water, and the optimized flow velocity can improve production efficiency while guaranteeing the water washing effect, through experiment and production practice determine the best flow velocity, can handle more isooctyl nitrate in unit time, under the premise of not reducing product quality, increase production yield, satisfy market demand, simultaneously, proper flow velocity can also reduce the time of water washing process, reduce energy consumption and manpower cost, improve overall production benefit, simultaneously, even dispersed discharge mode from the adjusting hole can guarantee that isooctyl nitrate and water can fully and evenly contact. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the whole structure schematic diagram of the utility model;

[0012] Figure 2 It is Figure 1 It is the enlarged view of A;

[0013] Figure 3 It is the lateral structure schematic diagram of the distribution speed regulation mechanism in the utility model;

[0014] Figure 4 It is the structure schematic diagram of the cylinder in the utility model;

[0015] Figure 5 It is the structure schematic diagram of the sleeve in the utility model;

[0016] In the diagram: 1. Oil phase separator; 2. Aqueous phase settler; 3. Fiber membrane contactor; 4. Oil phase outlet; 5. Aqueous phase outlet; 6. Feed pipe; 7. Cylinder; 8. Sleeve; 9. Stepper motor; 10. Wire mesh packing. Detailed Implementation

[0017] like Figures 1 to 5 As shown, a water washing membrane separation device for isooctyl nitrate production includes an oil phase separator 1, an aqueous phase settler 2, and a fiber membrane contactor 3. The device is characterized by: an oil phase outlet 4 at the top of the oil phase separator 1; an aqueous phase outlet 5 at the bottom of the aqueous phase settler 2; a sealed connection between the bottom of the oil phase separator 1 and the top of the fiber membrane contactor 3; a sealed connection between the top of the aqueous phase settler 2 and the bottom of the pipe wall of the fiber membrane contactor 3; a distributed speed regulating mechanism between the inner walls of the oil phase separator 1 and the aqueous phase settler 2, which have rectangular cross-sections and are opposite each other; and channels formed between the front and rear sides of the two distributed speed regulating mechanisms and the inner walls. The oil phase separator and the aqueous phase settler are respectively equipped with devices for distilling water and isooctyl nitrate. Octyl nitrate enters the feed pipe 6 of the distribution speed regulation mechanism. This mechanism evenly distributes the distilled water and isooctyl nitrate entering the washing equipment across the entire cross-section, ensuring uniform spraying and preventing uneven flow, localized overflow, or dry areas within the equipment. This guarantees sufficient and uniform contact between isooctyl nitrate and water, thereby improving the washing effect and ensuring consistent product quality. Uniform liquid distribution also makes the pressure distribution within the equipment more even, reducing localized pressure fluctuations caused by uneven liquid distribution, thus improving the operational stability and reliability of the equipment. Furthermore, good liquid distribution can reduce energy consumption, increase production efficiency, and lower production costs.

[0018] During the washing process, isooctyl nitrate enters from the top of the device, while distilled water enters from the bottom. Since isooctyl nitrate is generally less dense than water, it floats to the top during washing, while the water flows downwards due to gravity. This counter-current flow ensures a significant concentration difference throughout the mass transfer process, facilitating the transfer of impurities from isooctyl nitrate to distilled water and improving washing efficiency. At the bottom of the device, the distilled water containing impurities accumulates and flows out, while the washed isooctyl nitrate flows out from the top.

[0019] The distribution speed regulation mechanism comprises a cylinder 7 rotatably connected between the opposite two side walls and a sleeve 8 sleeved outside the cylinder 7 and fixedly connected between the opposite two side walls, a plurality of uniformly distributed through holes are formed in the side wall of the sleeve 8 towards the fiber membrane contactor 3, a plurality of uniformly distributed and corresponding regulating holes are formed in the side wall of the cylinder 7, the outer wall of the cylinder 7 is closely attached to the inner wall of the sleeve 8 and is slidably connected, the two feeding pipes 6 are respectively penetrated through the side walls of the oil phase separator 1 and the water phase settler 2 and are rotatably installed, the feeding pipes 6 are coaxially arranged with the cylinder 7 and are in communication with each other and are integrally formed, the step motor 9 is fixedly arranged on the side wall of the oil phase separator 1 and the water phase settler 2, the output shaft of the step motor 9 is fixedly connected to one end of the cylinder 7 away from the feeding pipe 6, the step motor 9 drives the cylinder 7 to rotate by a small angle, the through holes on the surface of the cylinder 7 are dislocated with the regulating holes on the sleeve 8, the flow rate is regulated by regulating the size of the outlet, in addition, the liquid entering the cylinder through the feeding pipe 6 passes through the through holes on the cylinder 7, the regulating holes are uniformly arranged, so that the liquid is uniformly dispersed and discharged from the regulating holes, and the inlet end of the feeding pipe 6 is in communication with the external liquid storage tank through the rotary joint.

[0020] The water phase settler 2 is provided with a wire mesh filler 10, and the wire mesh filler 10 is a hydrophilic stainless steel wire mesh.

[0021] The specific operation process of the utility model is as follows:

[0022] In operation, the step motor 9 is started to rotate, the flow rate is controlled by regulating the size of the water outlet, distilled water is conveyed into the cylinder 7 through the feeding pipe 6 on the oil phase separator 1 and the flow rate is regulated after passing through the regulating holes on the sleeve 8, and then the distilled water is uniformly distributed on the cross section of the equipment and enters the fiber membrane contactor 3, the isooctyl nitrate to be washed is conveyed into the cylinder 7 through the feeding pipe 6 on the water phase settler 2, is discharged through the regulating holes and enters the fiber membrane contactor 3, the density of the isooctyl nitrate is generally less than that of water, the isooctyl nitrate floats upwards, and the water flows downwards due to gravity, and the two naturally form a countercurrent trend, so that the distilled water and the isooctyl nitrate form a good gas-liquid contact state in the device, the water contacts the isooctyl nitrate in the form of uniform liquid film or liquid drops, the gas-liquid mass transfer area is increased, impurities are transferred from the isooctyl nitrate phase to the water phase, the mass transfer efficiency is improved, and the impurities in the isooctyl nitrate are more effectively removed, finally, the oil phase carrying the water phase enters the oil phase separator 1 to complete oil-water separation, the oil phase is discharged from the oil phase outlet 4, and the distilled water containing impurities is discharged from the water phase outlet 5 after completing water-oil settling separation in the water phase settler 2.

Claims

1. A water-washing membrane separation device for the production of isooctyl nitrate, comprising an oil phase separator (1), an aqueous phase settler (2), and a fiber membrane contactor (3), characterized in that: The oil phase separator (1) has an oil phase outlet (4) at its top and the aqueous phase settler (2) has an aqueous phase outlet (5) at its bottom. The bottom of the oil phase separator (1) is sealed to the top of the fiber membrane contactor (3). The top of the aqueous phase settler (2) is sealed to the bottom of the pipe wall of the fiber membrane contactor (3). A distributed speed regulation mechanism is provided between the inner walls of the two sides of the oil phase separator (1) and the aqueous phase settler (2) which have rectangular cross sections and are opposite to each other. A channel is formed between the front and rear sides of the two sets of distributed speed regulation mechanisms and the inner walls. The oil phase separator and the aqueous phase settler are respectively provided with feed pipes (6) for distilled water and isooctyl nitrate to enter the distributed speed regulation mechanism.

2. The water washing membrane separation device for isooctyl nitrate production according to claim 1, characterized in that, The distributed speed regulation mechanism includes a cylinder (7) rotatably connected between the inner walls of opposite sides and a sleeve (8) sleeved on the outside of the cylinder (7) and fixedly connected between the inner walls of opposite sides. The sleeve (8) has several evenly distributed through holes on the side wall facing the fiber membrane contactor (3). The side wall of the cylinder (7) has several evenly distributed adjustment holes that correspond one-to-one with the through holes. The outer wall of the cylinder (7) is tightly fitted and slidably connected to the inner wall of the sleeve (8). The two feed pipes (6) are respectively rotatably installed through the side walls of the oil phase separator (1) and the water phase settler (2). The feed pipes (6) are coaxially arranged with the cylinder (7) and interconnected, and are integrally formed.

3. The water washing membrane separation device for isooctyl nitrate production according to claim 2, characterized in that, Both the oil phase separator (1) and the water phase settler (2) are fixedly equipped with stepper motors (9). The output shaft of the stepper motor (9) is fixedly connected to the end of the cylinder (7) away from the feed pipe (6) to drive the cylinder (7) to rotate.

4. The water washing membrane separation device for isooctyl nitrate production according to claim 1, characterized in that, The water phase sedimentation device (2) is equipped with wire mesh packing (10), which is a hydrophilic stainless steel wire mesh.

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