Coalescence separation device for acrylic ester production

Abstract

The utility model discloses a coalescence separation device for acrylic ester production, which comprises an inner shell and an outer shell, a coil pipe structure for circulating chilled water is additionally arranged between the inner shell and the outer shell, a feeding pipe is communicated with an alkaline solution tank and a polymerization inhibitor storage tank through a pipeline valve, and a Y-shaped filter is further arranged between the feeding pipe and the separation device. And the coalescence filter element is communicated with the oil product temporary storage tank through a pipeline. The clogging of the coalescence separation device is prevented by reducing the temperature of the separation device, reducing solids entering the coalescence separation device, adding a polymerization inhibitor and an alkaline solution that dissolves a polymer thereto, and rapidly transferring separated oil and water. In addition, in order to conveniently replace and maintain the internal filter element, the coalescence filter element and the separation filter element are further provided with flanges with notches, and the flanges are rapidly connected with the clamping blocks of the inner shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to coalescing separation device technical field, specifically relates to a coalescing separation device for acrylic ester production. BACKGROUND

[0002] In the acrylic ester production process, the problems such as distillation volatilization caused by heating substrate to produce chemical reaction, volatile matter is collected through condenser and oil-water mixture is separated, usually coalescing separation device is used to carry out this work, coalescing separation device usually includes coalescing filter element and separation filter element, mixture first flows into coalescing filter element, coalescing filter element filters out solid impurities and condenses tiny water droplets into larger water beads. Most of the coalesced water beads can be separated and settled into the water collecting tank from the oil product by gravity. Then the oil product flows through the separation filter element to further separate the water, and finally the clean and water-free oil product flows out of the coalescing separation device.

[0003] But in the acrylic ester production, coalescing separation faces some technical problems, the reaction liquid of acrylic ester has high viscosity and dispersed phase content, which easily leads to the blockage of separation element. In addition, acrylic monomer can occur polymerization reaction at 60 DEG C, and the temperature of industrial production of acrylic ester is usually higher than 110 DEG C, which leads to the possibility of high polymerization reaction of condensed acrylic acid, and the polymerization of acrylic acid will form sediment to block the filter element, resulting in more polymer sediment in the equipment, affecting the long-term stability and service life of the equipment. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the defects of prior art, providing a coalescing separation device for acrylic ester production, improving the structure of coalescing separation device according to the production characteristics of acrylic ester, so that the blockage is reduced when separating liquid with polymerization characteristics and high viscosity.

[0005] To achieve the above object, the utility model provides the technical scheme as follows:

[0006] A coalescing separation device for acrylic ester production, including the shell, its characterized in that: the shell includes inner shell and outer shell, the inner shell is vertically provided with coalescing filter element in the inside, the coalescing filter element is provided with separation filter element in the inside, the inner shell top is connected with feed pipe, the inner shell bottom is connected with drain pipe between coalescing filter element and separation filter element, the drain pipe is provided with drain valve, the outer shell is provided with refrigerated water inlet and refrigerated water outlet, the refrigerated water inlet and refrigerated water outlet are connected with circulating water pipe, the circulating water pipe forms coil structure around the inner shell, and the circulating water pipe is connected with refrigerated water pipe.

[0007] Further, the bottom of the coalescing filter element is connected with the oil discharge pipeline, and the oil discharge pipeline is connected with the oil temporary storage tank.

[0008] Further, the feed pipe is also connected with a polymerization inhibitor storage tank through a pipeline and a valve.

[0009] Further, a flange-connected Y-shaped filter is arranged between the feed pipe and the shell.

[0010] Further, the feed pipe is also connected with an alkaline solution tank through a pipeline and a valve.

[0011] Further, the inner wall surface of the inner shell is provided with a polytetrafluoroethylene lining.

[0012] In order to facilitate the replacement, cleaning and maintenance of the coalescing filter and the separation filter, the technical scheme further comprises that the shell is provided with a top cover which is openable and closable through buckles.

[0013] Further, the lower part of the top cover is also fixedly provided with a flow guide hopper through a connecting rod, the end of the feed pipe is opposite to the flow guide hopper, and the flow guide hopper has a conical cylinder structure.

[0014] Further, the two kinds of filters are combined with the bottom of the inner shell through a quick connection structure, the quick connection structure comprises that a flange is arranged in the bottom end of the two kinds of filters and coaxially arranged inside the filter, the flange is provided with a gap, a clamping block which is adapted to the flange and the gap is arranged upwards on the bottom of the inner shell, the clamping block is inserted into the filter through the gap, the filter is relatively rotated with the clamping block, and the clamping block is locked with the flange to fix the filter.

[0015] Further, a floating interface meter capable of reflecting a water-oil interface is arranged between the coalescing filter and the separation filter, and the opening and closing of a drain valve and the floating interface meter are arranged through circuit interlocking.

[0016] The advantages and beneficial effects of the utility model lie in that:

[0017] 1. A refrigerated water circulating winding is additionally arranged between the inner shell and the outer shell to adjust the temperature in the coalescing and separating device, so that the polymeric properties of acrylic acid and other oil products with high temperature are prevented from being polymerized into deposits to cause blockage. In addition, the refrigerated water of the device can be shared with a condenser of a pre-process and realize continuous work.

[0018] 2. The feed pipe is connected with a polymerization inhibitor storage tank, an alkaline solution tank and a Y-shaped filter through a valve and a pipeline, which are respectively used for preventing polymerization of oil products, dissolving polymers and pre-filtering solid particles, so that the blockage problem of the coalescing and separating device caused by the polymerization of acrylic acid oil products is prevented in multiple angles.

[0019] 3. The top cover is openable and closable connected to the coalescing and separating device through buckles, and the coalescing filter and the separation filter are assembled with the inner shell through a quick connection structure formed by the flange with the gap and the clamping block, so that the maintenance work is more simple and fast. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the utility model;

[0021] Figure 2 is a structural schematic diagram of the utility model quick connecting structure;

[0022] In the drawings:

[0023] 1-inner shell, 2-outer shell, 3-coalescence filter core, 4-separation filter core, 5-feeding pipe, 6-drain pipe, 7-drain valve, 8-chilled water inlet, 9-chilled water outlet, 10-circulating water pipe, 11-oil discharge pipeline, 12-oil temporary storage tank, 13-polymerization inhibitor storage tank, 14-alkali solution tank, 15-Y-shaped filter, 16-buckle, 17-top cover, 18-connecting rod, 19-diversion hopper, 20-flange, 21-notch, 22-clamping block, 23-floating interface meter. DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model are further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0025] Embodiment

[0026] A coalescence separation device for acrylate production, including shell, the shell includes inner shell 1 and outer shell 2, and the inner shell 1 is vertically provided with coalescence filter core 3 inside, and the coalescence filter core 3 is provided with separation filter core 4 inside, the inner shell 1 top is communicated with feeding pipe 5, and the bottom is communicated with drain pipe 6, and the drain pipe 6 is provided with drain valve 7, and the outer shell 2 is provided with chilled water inlet 8 and chilled water outlet 9, and the chilled water inlet 8 and chilled water outlet 9 are communicated and are provided with circulating water pipe 10, the circulating water pipe 10 forms coil pipe structure around the inner shell 1, and the circulating water pipe 10 is connected with chilled water pipeline. The bottom of coalescence filter core 3 is communicated with oil discharge pipeline 11, and the oil discharge pipeline 11 is connected with oil temporary storage tank 12. Feeding pipe 5 is also connected with polymerization inhibitor storage tank 13 and alkali solution tank 14 through pipeline and valve. Sodium hydroxide solution is preferably filled in alkali solution tank 14. Flange connection is further provided between feeding pipe 5 and shell to filter Y-shaped filter 15 of solid particle impurities. The inner wall surface of inner shell 1 is attached with polytetrafluoroethylene lining, and the separation filter core surface has oleophobic hydrophobic layer.

[0027] By the above technical scheme, the inner and outer shells are connected to the chilled water for cooling, the polymerization rate is slowed down to reduce the sediment generated by the polymerization of acrylic acid, thereby reducing the possibility of filter core blockage. The obtained acrylic acid and ester can be directly flowed into the oil product temporary storage tank 12 in the coalescence separation device, avoiding the acrylic acid and the like staying in the inner shell for a long time, causing the reaction to generate polymer to block the filter core. The polymerization inhibitor is added during feeding, so that the polymerization inhibitor is mixed with the feed solution, reducing the possibility of sediment generated by the polymerization of acrylic acid. After the coalescence separation device works for several weeks, the alkaline solution can be added to the coalescence separation device, and the alkaline solution can effectively depolymerize the solid polymer formed by the polymerization of acrylic acid into an oily liquid, reducing the blockage caused by solid particles. The inner lining made of polytetrafluoroethylene material can prevent the alkaline solution from corroding the shell, prolonging the service life of the coalescence separation device.

[0028] To facilitate the replacement, cleaning and maintenance of the coalescence filter core 3 and the separation filter core 4, the technical scheme further comprises that the shell is provided with a top cover 17 which is openable and closable through a buckle 16. The lower part of the top cover 17 is further fixedly provided with a conical cylinder structure guide hopper 19 through a connecting rod 18. The two filter cores are combined with the bottom of the inner shell 1 through a quick connection structure. The quick connection structure is as follows: a flange 20 is arranged coaxially inward at the bottom end of the two filter cores, the flange 20 is provided with a notch 21, and a clamping block 22 which is adapted to the flange 20 and the notch 21 is arranged upward at the bottom of the inner shell. After the clamping block 22 is inserted into the filter core through the notch 21, the filter core is relatively rotated with the clamping block, and the clamping block 22 is locked and fixed with the flange 20 to fix the filter core. A floating interface meter 23 which can reflect the water-oil interface is arranged between the coalescence filter core 3 and the separation filter core 4. The drain valve 7 is an electronic valve, and the drain valve 7 and the floating interface meter 23 are arranged through circuit interlocking.

[0029] Through the above technical scheme, the guide hopper is used to prevent the liquid mixture entering the feed pipe from directly impacting the filter core or flowing into the inner wall of the separation filter core, causing the part of the filter core directly impacted to be excessively impacted and the separation effect to be poor or the oil-water mixture to directly flow into the oil discharge pipeline without being filtered and separated by the two layers of filter cores, causing ineffective separation. After the buckle 16 is used to open and close the top cover 17, the filter core is replaced more conveniently through the quick connection structure. Specifically, the notch 21 of the flange 20 at the bottom of the filter core is aligned with the clamping block 22, the clamping block 22 is inserted into the notch 21 after the filter core is pressed down, and the filter core is rotated to make the clamping block 22 buckled with the flange 20, so that the assembly is completed. When disassembled, the filter core is pulled out after the notch 21 is aligned with the clamping block 22 by rotating the filter core. The drain valve 7 and the floating interface meter 23 are arranged through circuit interlocking. When the floating interface meter detects that the water-oil interface is not obvious, that is, the oil phase is about to be discharged, the drain valve 7 is prevented from mistakenly discharging the oil phase in the drainage work.

[0030] Working principle:

[0031] The drain valve is in a closed state, and before the condensate generated in the condenser in the acrylic acid production flows into the coalescence separation device from the feed pipe, the valve at the inhibitor storage tank is opened to add the inhibitor into the coalescence separation device, and the oil-water mixture passes through the Y-shaped filter for the first time to filter solid particles, especially dust impurities, and then enters from the feed port and falls along the guide plate from the periphery of the inner shell to the bottom end of the inner shell. The chilled water pipeline passes through the circulating chilled water to keep the temperature of the inner shell below 40 degrees Celsius. The oil in the oil-water mixture can pass through the coalescence filter element and the separation filter element and finally gather in the separation filter element, and the oil with polymerization characteristics can directly flow into the oil temporary storage tank from the oil outlet pipeline. The water coalesced through the coalescence filter element can flow out from the drain valve. The solid or viscous liquid generated by polymerization between the inner shell and the coalescence filter element during the process can be filtered by the coalescence filter element. The deposits generated between the coalescence filter element and the separation filter element can be discharged from the drain pipe. After one week of work, the coalescence separation work is stopped, the alkaline solution tank is opened, the feed pipe is connected to water, and the alkaline solution is added to the coalescence separation device to decompose and discharge the polymerization deposits between the inner shell and the coalescence filter element.

[0032] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A coalescing separation device for the production of acrylic esters comprising a housing, characterized in that: The shell comprises an inner shell and an outer shell, a coalescence filter is vertically arranged inside the inner shell, a separation filter is arranged inside the coalescence filter, a feed pipe is communicated with the top end of the inner shell, a drain pipe is communicated with the bottom end of the inner shell between the coalescence filter and the separation filter, the drain pipe is provided with a drain valve, the outer shell is provided with a chilled water inlet and a chilled water outlet, the chilled water inlet and the chilled water outlet are communicated with a circulating water pipe, the circulating water pipe surrounds the inner shell to form a coil pipe structure, and the circulating water pipe is connected with a chilled water pipe.

2. The coalescing separation device for producing acrylate according to claim 1, characterized by: The bottom end of the coalescence filter is communicated with an oil discharge pipe, and the oil discharge pipe is connected with an oil temporary storage tank.

3. The coalescer separation device for producing an acrylate according to claim 1 or 2, characterized in that: The feed pipe is further connected with a polymerization inhibitor storage tank through a pipe and a valve.

4. The coalescing separation device for acrylate production according to claim 1, characterized in that: A Y-shaped filter connected through flanges is further arranged between the feed pipe and the shell.

5. The coalescing separation device for acrylate production according to claim 1, characterized in that: The shell is provided with a top cover which can be opened and closed through buckling.

6. The coalescing separation device for producing acrylate esters according to claim 5, characterized in that: A flow guide hopper is further fixedly arranged at the lower part of the top cover through a connecting rod, the end of the feed pipe is opposite to the flow guide hopper, and the flow guide hopper has a conical cylinder structure.

7. The coalescing separation device for acrylate production according to claim 1, characterized in that: The two filters are combined with the bottom of the inner shell through a quick connection structure, the quick connection structure comprises a flange arranged coaxially inward at the bottom end of the two filters, and a clamping block adapted to the flange and the notch is arranged upward at the bottom of the inner shell.

8. The coalescing separation device for acrylate production according to claim 1, characterized by: The feed pipe is further connected with an alkaline solution tank through a pipe and a valve.

9. The coalescing separation device for acrylate production according to claim 1, characterized in that: A polytetrafluoroethylene lining is arranged on the inner wall surface of the inner shell.

10. The coalescing separation device for acrylate production according to claim 1, characterized in that: A floating interface meter is arranged between the coalescence filter and the separation filter, the drain valve is an electronic valve, and the floating interface meter and the drain valve are arranged in interlocking through a circuit.

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