CN203625268U - Absorption device for removing peroxide in acrylonitrile product - Google Patents
Absorption device for removing peroxide in acrylonitrile product Download PDFInfo
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- CN203625268U CN203625268U CN201320539671.6U CN201320539671U CN203625268U CN 203625268 U CN203625268 U CN 203625268U CN 201320539671 U CN201320539671 U CN 201320539671U CN 203625268 U CN203625268 U CN 203625268U
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- adsorption bed
- vinyl cyanide
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Abstract
The utility model relates to a production device of chemical products, and particularly relates to an absorption device for removing peroxide in an acrylonitrile product. The absorption device is characterized by being provided with an adsorption bed reactor, wherein an activated aluminum oxide adsorbent is contained in the reactor, and the adsorption bed reactor adopts spherical-particle activated aluminum oxide. The stack height of the adsorption bed activated aluminum oxide is 2.0-2.5m, and the contact time between the acrylonitrile material and the activated aluminum oxide of the adsorption bed reactor is 0.5-2.5 minutes. An inertia ceramic ball serves as a carrier, and a fixed grid is provided; in the reaction equipment supported by the fixed grid, the material of the shell and the internal part is SS304 stainless steel. The device provided by the utility model has the beneficial effects that due to the characteristics of porous structure, good thermal stability, high specific surface area and the like of aluminum oxide, about 0.1ppm of peroxide in the acrylonitrile product can be perfectly adsorbed, which is much lower than the national standard 0.2ppm, and the product quality meets the indexes of high-grade products. The production of enterprises of acrylonitrile is better, thereby benefiting the nation and the people.
Description
Technical field
The utility model relates to a kind of production equipment of Chemicals, particularly a kind of vinyl cyanide product production device.
background technology
Vinyl cyanide is a kind of colourless organic liquid, is the main raw material of synthon, synthetic rubber, synthetic resins and acrylamide.Along with the diversification of vinyl cyanide derived product processing, peroxide in vinyl cyanide product content is also had to different requirements, the enterprise that the problem that superoxide exceeds standard is perplexing vinyl cyanide industry often produces.
In the production process of vinyl cyanide product, in product, often there is the phenomenon that peroxide level exceeds standard, national standard is 0.2ppm, the highest peroxide level in currently available products reaches 2.0ppm, on average reach 1.0ppm, considerably beyond state quality standard, bring serious impact to the production of derived product, directly have influence on the sales and marketing competitive power of vinyl cyanide product.For this reason, acrylonitrile plant has carried out a series of adjustment according to practical production experience to device, and after adjusting, peroxide level declines to some extent, but DeGrain, quality product does not reach top grade product index yet.
summary of the invention
The purpose of this utility model is to overcome the deficiency of prior art, and a kind of device of removing peroxide in vinyl cyanide product content overproof thing is provided.
A kind of vinyl cyanide product superoxide absorption unit of removing, it is characterized in that, be provided with adsorption bed reactor, the vinyl cyanide material of superoxide, enter adsorption bed reactor bottom from bottom to top, the material after absorption enters strainer and filters, and the vinyl cyanide finished product after filtration goes to tank field to store, the bottom raffinate of strainer refluxes and enters tank field house steward, and activated alumina adsorbents is housed in reactor; Inert ceramic balls is carrier, is provided with stationary grizzly, and stationary grizzly is supported in conversion unit, and housing and internals material are SS304 stainless steel.
Be provided with finished product strainer A and finished product filter B, material is: SS304 stainless steel.The further peroxide level in filtering product, the specification of strainer A and filter B is the same, and the in the situation that of normal running, the working order of strainer A and filter B is normal a use, and another is for subsequent use.
Be provided with overpressure protection measure safety valve in adsorption bed reactor head, in the time that device appearance is abnormal, safety valve jumping up, vinyl cyanide belongs to all materials of hazardous material (fluids) discharges by pipeline, and after safety valve jumping up, fluid enters tank field house steward by pipeline.
Filter bottom raffinate enters tank field house steward, and pipeline has raffinate stream to tank field house steward with the i=0.3% gradient.
Activated alumina is unbodied vesicular structure material, is a kind of solid materials of porousness high degree of dispersion, has very large specific surface, and its micropore surface has adsorption function.Consider the space factor of aluminum oxide, find that he is a kind of material of metamorphosis complexity, not only between different forms, even if its macrostructure character of same form, as density, porosity, pore size distribution, specific surface area etc., also differs widely according to its source difference.The active centre on activated alumina surface is hydroxyl and Lewis acid centers, and polarity is strong, and water is had to very strong affinity interaction.Because activated alumina material has vesicular structure, Heat stability is good, high-specific surface area and in unsettled transition state, thereby there is larger activity.In petrochemical complex, chemical fertilizer industry, be widely used as catalyzer, support of the catalyst.Because it has again characterization of adsorption, thereby as color and the antiodorant etc. of the sorbent material of the siccative of gas and liquid, gas sweetening, Reducing Fluoride Materials In Drinkeng Water, industrial sewage.
Adsorption bed reactor operating pressure is 0.8MPaG, 10～30 ℃ of service temperatures, and housing and internals material adopt SS304.Porcelain ball material specification is pottery, and activated alumina material specification is common.This invention utilizes activated alumina to carry out adsorption treatment to peroxide in vinyl cyanide product, be 0.5 minute to 2.5 minutes duration of contact that makes peroxide level in vinyl cyanide product reduce vinyl cyanide material and activated alumina, and top condition is 1.0 minutes to 2.0 minutes.Activated alumina consumption is 1.5 tons/time, and change once every half a year; Just the superoxide in vinyl cyanide product can be removed by adsorption treatment, and water and stopper are still stayed in vinyl cyanide.
By experiment the activated alumina sample of different model is carried out to superoxide adsorption test, by analysis of experimental data, by activated alumina, vinyl cyanide product has been carried out, after adsorption treatment, can reducing peroxide level.The in the situation that peroxide level being lower than 3.0ppm in finished product, can reach top grade product index by absorption.Slightly raise through the water-content in adsorbs propylene nitrile finished product, the content of stopper slightly reduces, but all little on the impact of water and stopper MEHQ content.Use the model difference of activated alumina, treatment effect is also different.The height of activated alumina intensity, to the removal effect difference of superoxide.
The beneficial effects of the utility model are: the vesicular structure that utilizes aluminum oxide, Heat stability is good, the characteristics such as high-specific surface area, the peroxide level in adsorbs propylene nitrile product is 0.1ppm left and right well, be 0.2ppm far below national standard, quality product reaches top grade product index.In vinyl cyanide industry, the production of enterprise is better, benefits the nation and the people.
Accompanying drawing explanation
Fig. 1 is the utility model schematic flow sheet.
Adsorption bed reactor 1, strainer A2, filter B 3 in figure.
Embodiment
Below in conjunction with accompanying drawing with specifically depending on example, the present invention is made further detailed description.
As shown in Figure 1, the utility model is provided with adsorption bed reactor 1, reactor 1 is equipped with activated alumina adsorbents, the vinyl cyanide material of high superoxide, enter adsorption beds of activated alumina reactor 1 bottom from bottom to top, material after absorption enters strainer and filters, and the vinyl cyanide finished product after filtration goes to tank field to store, and the bottom raffinate of strainer refluxes and enters tank field house steward; Inert ceramic balls is carrier, be provided with stationary grizzly, in the conversion unit supporting, housing and internals material are SS304 stainless steel, be provided with finished product strainer A2 and finished product filter B 3, material is: SS304 stainless steel, the further peroxide level in filtering product, strainer A2 is the same with the specification of filter B 3, and the in the situation that of normal running, the working order of strainer A2 and filter B 3 is normal a use, another is for subsequent use, in the time of a strainer fault wherein, start another strainer for subsequent use, guarantee the quality of product.
Be provided with overpressure protection measure safety valve in adsorption bed reactor head; in the time that device appearance is abnormal; safety valve jumping up when reactor head pressure reaches 0.9MPaG, vinyl cyanide belongs to all materials of hazardous material (fluids) discharges by pipeline, and after safety valve jumping up, fluid enters tank field house steward by pipeline.
Filter bottom raffinate enters tank field house steward, and the pipeline of raffinate is with gradient i=0.3% slope aspect tank field house steward, and the fluid after safety valve jumping up enters tank field house steward.
An adsorption bed reactor for treatment ability is 120,000 tons/year, housing internal diameter 1100mm, and the high 4200mm of cylindrical shell, adsorption bed reactor, pressure is 0.8MPaG, temperature is 10～30 ℃, adopts spherical particle activated alumina, Al
2o
3content>=93%, diameter is 3～5mm, tap density>=0.7g/mL, specific surface area 300～420m
2/ g, ultimate compression strength>=150N/.Adsorption bed activated alumina piling height is 2.0～2.5m, and adsorption bed reactor vinyl cyanide material and activated alumina duration of contact are 0.5 minute to 2.5 minutes, and top condition is 1.0 minutes to 2.0 minutes.Just superoxide can be removed by adsorption treatment, and water and stopper are still stayed in vinyl cyanide.In adsorption process, on the reflux pipeline of discharge pump, drawing one flow is 30～60Nm
3the vinyl cyanide material of/h, enters adsorption beds of activated alumina bottom from bottom to top.With the superoxide in adsorbs propylene nitrile.After having adsorbed, enter strainer further filter by adsorption bed lateral line discharging, through enclosed sampling analysis, send into vinyl cyanide finished pot after qualified, unacceptable product is back to original vinyl cyanide tundish.After activated alumina adsorptive reactor comes into operation, the superoxide of vinyl cyanide finished product tundish is effectively controlled, and in product, other index is substantially unaffected, and product high-grade-goods rate can be greatly improved.
Sorbent material in adsorption bed reactor is activated alumina, and consumption is 1.5 tons/time, and change once every half a year, and the activated alumina of inactivation belongs to Hazardous wastes and send landfill yard landfill disposal.
The technical solution of the utility model is implemented in the acrylonitrile installation of somewhere, through nearly operation more than 3 years, examination, explained hereafter stable operation indices all reaches design requirements, peroxide level in vinyl cyanide product is 0.1ppm left and right, be reduced to below 0.2ppm, thoroughly solve the problem that vinyl cyanide product superoxide exceeds standard, and other performance index of vinyl cyanide product are not affected, make vinyl cyanide product all reach national superior product index, the various demands of downstream user are met better, user's is completely reacted, improve widely the competitive capacity of enterprise.
Claims (3)
1. remove vinyl cyanide product superoxide absorption unit for one kind, it is characterized in that, be provided with adsorption bed reactor (1), finished product strainer A (2), finished product filter B (3), the vinyl cyanide of high superoxide enters from adsorption bed reactor (1) bottom, through adsorption bed reacting rear material from adsorption bed reactor (1) top out, enter finished product strainer A (2) and finished product filter B (3), going out vinyl cyanide finished product goes to tank field to store, the bottom of finished product strainer A (2) and finished product filter B (3), the superoxide that goes out vinyl cyanide product enters tank field house steward,
The vinyl cyanide material that contains superoxide, enter adsorption bed reactor (1) bottom from bottom to top, material after absorption enters strainer and filters, vinyl cyanide finished product after filtration goes to tank field to store, the bottom raffinate of strainer refluxes and enters tank field house steward, reactor is equipped with activated alumina adsorbents in (1), adopts spherical particle activated alumina; The carrier of activated alumina is inert ceramic balls, and adsorption bed reactor is provided with stationary grizzly in (1), is provided with bracing frame in stationary grizzly, and bracing frame is fixed in adsorption bed reactor (1) equipment, and housing and internals material are SS304 stainless steel;
Be provided with finished product strainer A (2) and finished product filter B (3), material is: SS304 stainless steel; Strainer A (2) is the same with the specification of filter B (3), and the in the situation that of normal running, the working order of strainer A (2) and filter B (3) is normal a use, and another is for subsequent use.
2. according to a kind of vinyl cyanide product superoxide absorption unit of removing claimed in claim 1, it is characterized in that, described adsorption bed reactor (1) top is provided with safety valve, and after safety valve jumping up, fluid enters tank field house steward by pipeline.
3. according to a kind of vinyl cyanide product superoxide absorption unit of removing claimed in claim 1, it is characterized in that, described strainer A (2), filter B (3) bottom raffinate enter tank field house steward, and pipeline has raffinate stream to tank field house steward with the i=0.3% gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320539671.6U CN203625268U (en) | 2013-08-26 | 2013-08-26 | Absorption device for removing peroxide in acrylonitrile product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320539671.6U CN203625268U (en) | 2013-08-26 | 2013-08-26 | Absorption device for removing peroxide in acrylonitrile product |
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| CN203625268U true CN203625268U (en) | 2014-06-04 |
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| CN201320539671.6U Expired - Lifetime CN203625268U (en) | 2013-08-26 | 2013-08-26 | Absorption device for removing peroxide in acrylonitrile product |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525096A (en) * | 2014-12-11 | 2015-04-22 | 中国科学院化学研究所 | Aluminum oxide adsorbent as well as preparation method and application thereof |
| CN107778197A (en) * | 2016-08-29 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of method of purification of acrylonitrile |
| CN116120210A (en) * | 2022-12-29 | 2023-05-16 | 南通立洋化学有限公司 | Purification method for preparing acetonitrile by acetic acid ammoniation method and application thereof |
-
2013
- 2013-08-26 CN CN201320539671.6U patent/CN203625268U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525096A (en) * | 2014-12-11 | 2015-04-22 | 中国科学院化学研究所 | Aluminum oxide adsorbent as well as preparation method and application thereof |
| CN107778197A (en) * | 2016-08-29 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of method of purification of acrylonitrile |
| CN116120210A (en) * | 2022-12-29 | 2023-05-16 | 南通立洋化学有限公司 | Purification method for preparing acetonitrile by acetic acid ammoniation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190930 Address after: 132002 3-6 and 9-13 floors of Block A, Jihua Economic and Trade Center, Tongtan Road, Changyi District, Jilin Province Patentee after: PetroChina Jilin Chemical Engineering Co.,Ltd. Address before: Changyi District of Jilin city in Jilin province 132001 Tong Tan Road Jihua Trade Center building A Patentee before: JILIN DESIGNING INSTITUTE OF CNPC NORTHEAST REFINING & CHEMICAL ENGINEERING Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |
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| CX01 | Expiry of patent term |