CN214288243U - Deiodination resin bed for acetic acid finished product - Google Patents

Abstract

The utility model relates to an acetic acid finished product deiodination resin bed, including the bed body, the balanced export of gaseous phase, liquid phase material import, liquid phase material export, material liquid inlet distributor and material liquid outlet distributor, still include resin exchange mechanism, place the resin space, resin inlet and resin discharge port, resin exchange mechanism comprises resin exchange grid tray and water cap respectively, resin exchange grid tray level in the several resin exchange mechanism is expanded all around, the bed body that is located corresponding resin exchange grid tray top and below is fixed with resin exchange grid tray horizontal centre gripping, a plurality of water caps are evenly distributed respectively and fix on the resin exchange grid tray that is located the bed internal position; through the scheme, the resin exchange grid plate is designed by two or more sections, and the filtering silk screen and the silk screen pressing plate are replaced by adopting the water cap technology, so that the sealing is tighter, the service life of the resin exchange mechanism is effectively prolonged, the service life of the equipment is prolonged, the filtering precision is high, the qualified rate of finished products is greatly improved, and the assembly is simple and the maintenance is convenient.

Description

Deiodination resin bed for acetic acid finished product

Technical Field

The utility model relates to a resin bed in the chemical field, in particular to a deiodination resin bed for a finished acetic acid product.

Background

The process for synthesizing acetic acid by using methanol and carbon monoxide through low-pressure carbonylation selects iodide as a catalyst promoter, so that the finished acetic acid product inevitably contains a small amount of iodides such as CH3I, HI, KI, molecular iodine and other alkyl iodides, and although most of iodides can be removed by conventional rectification and chemical treatment processes, the product still contains a certain amount of iodides.

In the acetic acid production process, in order to improve the yield and reduce the consumption, a catalyst system is improved, although the improved catalyst has the advantages of improving the yield and reducing the use of the catalyst and raw materials, the iodide content in the finished product is higher.

The use of iodide in the synthesis of acetic acid products is severely limited by the presence of iodide, particularly in the production process of downstream products prepared by taking acetic acid as a raw material and precious metals sensitive to iodine as catalysts, the iodine can poison the catalysts and reduce or even destroy the catalytic performance, for example, palladium and gold catalysts used in the process of synthesizing vinyl acetate from ethylene and acetic acid require that the iodide content in the raw material acetic acid is controlled below 10 x 10 < -9 >, so a feasible, economical and simple method capable of removing iodide in the finished product is arranged in the production process.

In the prior art, the grid plate in the prior art has low strength, cannot bear the gravity of resin and the impact of materials, often deforms and collapses, and only runs for three months, the device must be stopped for maintenance or replaced, resulting in the shutdown treatment and frequent maintenance of the device; 2. the grid plate in the prior art has poor sealing performance and short service cycle, and because the resin particles are small and are generally about 0.35mm, the fluidity is strong, the resin loss is seriously high under a high-pressure environment, and the resin loss rate reaches about ten to fifteen percent; 3. the grid plate in the prior art has complex structure and difficult maintenance, and needs to be re-processed or replaced by a new grid plate after the grid plate is deformed, so that the shutdown time is longer and the maintenance cost is higher due to higher processing period and processing cost of the grid plate; due to the problems, the grid plate in the prior art has short service cycle and the production cost is increased; the grid plate structure is not easy to maintain, easy to deform or overturn, the qualification rate of the process system is low, the quality of the finished product is poor, and the process technical requirements of the acetic acid product cannot be met.

SUMMERY OF THE UTILITY MODEL

In view of this, the main object of the utility model is to provide a resin bed is iodine removed to acetic acid finished product, through this technical scheme, utilize two sections or multistage design resin exchange grid tray, adopt the water cap technique to replace removing filtration silk screen and silk screen clamp plate, make sealed tighter, effectively prolonged the working life of resin exchange mechanism, improved the life cycle of equipment, the filter fineness is high, the finished product qualification rate improves greatly to the assembly is simple to maintain the convenience.

In order to achieve the above purpose, the technical solution of the present invention is realized as follows: a deiodination resin bed for finished acetic acid products comprises a bed body, a gas phase balance outlet, a liquid phase material inlet, a liquid phase material outlet, a material liquid inlet distributor and a material liquid outlet distributor, wherein the gas phase balance outlet is arranged on the top of the bed body, the material liquid inlet distributor and the material liquid outlet distributor are respectively arranged at the top of the bed body and the bottom of the bed body, the liquid phase material inlet and the liquid phase material outlet are respectively connected with the material liquid inlet distributor and the material liquid outlet distributor, the deiodination resin bed also comprises a resin exchange mechanism, a resin placing space, a resin inlet and a resin outlet, the resin exchange mechanism is respectively composed of a resin exchange grid plate and water caps, the resin exchange grid plate in the plurality of resin exchange mechanisms horizontally expands all around, the bed body above and below the corresponding resin exchange grid plate clamps and fixes the resin exchange grid plate horizontally, and the plurality of water caps are respectively and are uniformly distributed and fixed on the resin exchange grid plate positioned at the position in the bed body, the resin placing space is arranged between the material liquid inlet distributor and the resin exchange grid plate and between the upper adjacent resin exchange grid plate and the lower adjacent resin exchange grid plate, and the resin inlet and the resin outlet are respectively communicated with the upper part and the lower part of the resin placing space.

As a further technical scheme, the lower part of the water cap is provided with threads, the threads are screwed with an upper fastening nut and a lower fastening nut, through holes are uniformly distributed on the resin exchange grid plate, sealing gaskets are arranged on two sides of the through holes, the threads on the water cap penetrate through the through holes, and the water cap is fixed on the resin exchange grid plate in a sealing manner through the upper fastening nut and the lower fastening nut.

As a further technical solution, the resin inlet port is provided with an outer side inclined upward, and the resin outlet port is provided with an outer side inclined downward.

As a further technical scheme, the bed body is characterized by further comprising an upper manhole and a bottom manhole, wherein the upper manhole is arranged on the side wall of the bed body below the material liquid inlet distributor, and the bottom manhole is arranged at the bottom of the bed body.

As a further technical scheme, the device also comprises a lower manhole which is arranged on the side wall of the lower bed body of the space for placing the resin which is positioned at the lowest part in the bed body.

As a further technical scheme, the bed further comprises a safety valve port which is arranged on the top of the bed body.

The beneficial effect after adopting above-mentioned technical scheme is: the technical scheme is that two or more sections of resin exchange grid plates are designed, and a water cap technology is adopted to replace a filtering screen and a screen pressing plate, so that the sealing is tighter, the service life of the resin exchange mechanism is effectively prolonged, the service life of equipment is prolonged, the filtering precision is high, the qualified rate of finished products is greatly improved, and the assembly is simple and the maintenance is convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the resin exchange mechanism of the present invention.

Fig. 3 is a schematic top view of a resin exchange grid in the resin exchange mechanism according to the present invention.

Fig. 4 is a schematic view of an appearance structure of a water cap in the resin exchange mechanism of the present invention.

In the figure, a bed body 1, a gas phase balance outlet 2, a liquid phase material inlet 3, a liquid phase material outlet 4, a material liquid inlet distributor 5, a material liquid outlet distributor 6, a resin placing space 7, a resin adding port 8, a resin discharging port 9, a resin exchange grid plate 10, a water cap 11, threads 12, an upper fastening nut 13, a lower fastening nut 14, an upper manhole 15, a bottom manhole 16, a lower manhole 17 and a safety valve port 18 are arranged.

Detailed Description

The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1-4, the utility model relates to an acetic acid finished product deiodination resin bed, which comprises a bed body 1, a gas phase balance outlet 2, a liquid phase material inlet 3, a liquid phase material outlet 4, a material liquid inlet distributor 5 and a material liquid outlet distributor 6, wherein the gas phase balance outlet 2 is arranged on the top of the bed body 1, the material liquid inlet distributor 5 and the material liquid outlet distributor 6 are respectively arranged on the top of the bed body 1 and the bottom of the bed body 1, the liquid phase material inlet 3 and the liquid phase material outlet 4 are respectively connected with the material liquid inlet distributor 5 and the material liquid outlet distributor 6, the bed body also comprises a resin exchange mechanism, a resin placing space 7, a resin inlet 8 and a resin outlet 9, the resin exchange mechanism is respectively composed of a resin exchange grid plate 10 and a water cap 11, the resin exchange grid plates 10 in a plurality of resin exchange mechanisms are horizontally expanded all around, the bed body 1 above and below the corresponding resin exchange grid plate 10 horizontally clamps and fixes the resin exchange grid plate 10, a plurality of water caps 11 are respectively and uniformly distributed and fixed on a resin exchange grid plate 10 positioned in the bed body 1, the resin placing space 7 is arranged between the material liquid inlet distributor 5 and the resin exchange grid plate 10 and between the upper adjacent resin exchange grid plate 10 and the lower adjacent resin exchange grid plate 10, and the resin inlet 8 and the resin outlet 9 are respectively communicated with the upper part and the lower part of the resin placing space 7.

As a further embodiment, the lower part of the water cap 11 is provided with threads 12, the threads 12 are screwed with upper fastening nuts 13 and lower fastening nuts 14, through holes are uniformly distributed on the resin exchange grid 10, sealing gaskets are arranged on two sides of the through holes, the threads 12 on the water cap 11 penetrate through the through holes, and the water cap 11 is hermetically fixed on the resin exchange grid 10 through the upper fastening nuts 13 and the lower fastening nuts 14.

As a further example, the resin inlet port 8 is provided with an outer side inclined upward, and the resin discharge port 9 is provided with an outer side inclined downward.

As a further embodiment, the bed further comprises an upper manhole 15 and a bottom manhole 16, the upper manhole 15 is arranged on the side wall of the bed body 1 below the material liquid inlet distributor 5, and the bottom manhole 16 is arranged on the bottom of the bed body 1.

As a further embodiment, a lower manhole 17 is further included, and the lower manhole 17 is disposed on a side wall of the lower bed 1 of the lowermost resin placing space 7 in the bed 1.

As a further embodiment, a relief valve port 18 is further included, and the relief valve port 18 is arranged on the top of the bed body 1.

In the embodiment of the utility model, two-stage deiodination is adopted, and the deiodination can be taken or chosen according to actual needs; in general, each of the resin storage spaces 7 has a resin inlet port 8 and a resin outlet port 9, which are independent of each other, and in the resin storage space 7 located above, an upper manhole 15 is used to double as the resin inlet port 8.

The utility model discloses in, the material advances liquid distributor 5, the material goes out liquid distributor 6 and water cap 11 and all is the prior art who adopts, no longer gives detailed description here.

The bed body 1 in the utility model can be designed into sections with different shapes such as round, oval and square according to the needs of actual conditions; the water cap 11 fixedly designed on the resin exchange grid 10 can also be fixedly arranged on the lower surface of the resin exchange grid 10 and can realize the low-in and high-out operation mode by matching with the change of the feeding mode.

The utility model discloses at the during operation, the technology material is imported 3 through liquid phase material, the material advances liquid distributor 5 and enters into bed body 1 and carry out evenly distributed, place resin space 7 at the first and carry out primary absorption, separate through first resin exchange mechanism, the technology material continues to get into downwards the second and places resin space 7 and carry out the secondary absorption, carry out the secondary separation through second resin exchange mechanism once more, the technology material after the separation goes out liquid distributor 6 through the material and distributes and retrieve, get into next process unit.

The utility model discloses during the installation of well water cap 11, last fastening nut 13 and lower fastening nut 14's mounting nut moment control is at 850 newton meters, dismantles moment control at 2000 newton meters to guarantee the leakproofness between water cap 11 and the resin exchange grid tray 10, the technical scheme of the utility model, in actual production practice, through verifying, the resin loss rate is less than three ten thousandths, and life cycle is greater than five years.

The above description is only a preferred and practical embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (6)

1. A resin bed for removing iodine from acetic acid finished product comprises a bed body, a gas phase balance outlet, a liquid phase material inlet, a liquid phase material outlet, a material liquid inlet distributor and a material liquid outlet distributor, wherein the gas phase balance outlet is arranged on the top of the bed body, the material liquid inlet distributor and the material liquid outlet distributor are respectively arranged on the top of the bed body and the bottom of the bed body, the liquid phase material inlet and the liquid phase material outlet are respectively connected with the material liquid inlet distributor and the material liquid outlet distributor, the resin bed is characterized by further comprising a resin exchange mechanism, a resin placing space, a resin inlet and a resin outlet, the resin exchange mechanism is respectively composed of a resin exchange grid plate and water caps, the resin exchange grid plates in a plurality of resin exchange mechanisms are horizontally expanded all around, the bed body above and below the corresponding resin exchange grid plate horizontally clamps and fixes the resin exchange grid plate, and the water caps are respectively and uniformly distributed and fixed on the resin exchange grid plate positioned in the bed body, the resin placing space is arranged between the material liquid inlet distributor and the resin exchange grid plate and between the upper adjacent resin exchange grid plate and the lower adjacent resin exchange grid plate, and the resin inlet and the resin outlet are respectively communicated with the upper part and the lower part of the resin placing space.

2. The deiodination resin bed for acetic acid finished product according to claim 1, wherein the lower part of said water cap is provided with screw threads, the screw threads are screwed with upper and lower fastening nuts, the resin exchange grid plate is uniformly distributed with through holes, the two sides of the through holes are provided with sealing gaskets, the upper screw threads of the water cap are penetrated in the through holes, and the water cap is sealed and fixed on the resin exchange grid plate through the upper and lower fastening nuts.

3. The finished acetic acid deiodination resin bed as recited in claim 1, wherein an outer side of said resin addition port is disposed upward and inclined, and an outer side of said resin discharge port is disposed downward and inclined.

4. The deiodination resin bed for acetic acid finished product according to claim 1, further comprising an upper manhole and a bottom manhole, wherein the upper manhole is arranged on the side wall of the bed body below the material liquid inlet distributor, and the bottom manhole is arranged on the bottom of the bed body.

5. The deiodination resin bed for acetic acid finished product according to claim 1, further comprising a lower manhole disposed on a lower bed body side wall of a lowest resin placing space in the bed body.

6. The deiodinated resin bed as claimed in claim 1, further comprising a safety valve port disposed on the top of the bed body.

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