CN202968431U - Composite tower for separating intermediate products dimethyl oxalate and methanol in industrial production of ethylene glycol - Google Patents
Composite tower for separating intermediate products dimethyl oxalate and methanol in industrial production of ethylene glycol Download PDFInfo
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- CN202968431U CN202968431U CN 201220571276 CN201220571276U CN202968431U CN 202968431 U CN202968431 U CN 202968431U CN 201220571276 CN201220571276 CN 201220571276 CN 201220571276 U CN201220571276 U CN 201220571276U CN 202968431 U CN202968431 U CN 202968431U
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- tower
- ethylene glycol
- dimethyl oxalate
- industrial production
- intermediate products
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Abstract
The utility model discloses a composite tower for separating intermediate products dimethyl oxalate and methanol in industrial production of ethylene glycol. The tower comprises a closed vertical shell provided with a feed inlet, a gas phase methanol colleting device and a liquid collecting device. A float valve tower horizontally arranged in the vertical shell divides the vertical shell into upper and lower parts. The upper part is a rectifying section while the lower part is a stripping section. The rectifying section is internally provided with separating structured packing, and a stainless steel liner is arranged on the inner wall of the shell at the stripping section. With the adoption of the technical scheme, the part above the cylinder of the feed inlet is made of carbon steel, and the inner part is filled with structured packing, so that the resistance of the tower is reduced, the production efficiency is improved, and the safe production is ensured. The operating pressure of the composite tower is negative: -0.1 to -0.09MPa, and the operating temperature of the tower kettle is 150-170 DEG C to accelerate oxalate decomposition and reduce corrosion. According to the improved composite tower, the online service period is prolonged, and the maintenance cost of the device is lowered.
Description
Technical field
The utility model belongs to the ethylene glycol field of industrial production, and more particularly, the utility model relates to the compound tower of a kind of ethylene glycol industrial production isolation of intermediate products dimethyl oxalate and methyl alcohol.
Background technology
Indirect method synthesizing glycol technique is 2 footworks, and the first step is first by methyl nitrite and carbon monoxide carbonylation intermediate product dimethyl oxalate, and second step is by hydrogenation of dimethyl oxalate to synthesizing ethylene glycol; The dimethyl oxalate of oxonation device outlet is made of methyl alcohol through scrubber tower and is collected after the gas washing medium cleans, and obtains the mixed solution of dimethyl oxalate and methyl alcohol at the bottom of tower, and mixed solution with separating methanol, obtains pure dimethyl oxalate to recovery tower at the bottom of tower.Existing most of synthetic gas preparing ethylene glycol device intermediate product dimethyl oxalate ester will decomposite oxalic acid under the effect of minor amount of water, the compound tower of prior art adopts carbon steel material or common stainless steel mostly, decomposite oxalic acid the tower wall is had corrosive nature, after using for some time, the liner of tower is changed in the maintenance that will stop production, and this maintain and replace has strengthened production cost, if seriously corroded also can cause the generation of leakage accident.
The utility model content
Problem to be solved in the utility model is to provide a kind of reducing production costs, and guarantees the ethylene glycol industrial production isolation of intermediate products dimethyl oxalate of safety in production and the compound tower of methyl alcohol.
To achieve these goals, the technical scheme that the utility model is taked is: a kind of ethylene glycol industrial production isolation of intermediate products dimethyl oxalate that provides and the compound tower of methyl alcohol, comprise have opening for feed, the upright shell of the sealing of the collection device of gas-phase methanol and liquid collector, in upright shell, horizontally disposed valve tray column is divided into two ones of up and down with it, top is rectifying section, the bottom is stripping section, be provided with the separation structured packing in the rectifying section section, the stripping section inner walls is provided with stainless liner.
Preferably, valve tray column is the double-layer structure of the horizontal positioned that be arranged in parallel.
Preferably, the sidewall of upright shell is provided with opening for feed, and the bottom of opening for feed is near the valve tray column on upper strata.
Preferably, the top of upright shell is provided with the collection device of gas-phase methanol.
Preferably, the collection device of gas-phase methanol is the air collector that the affixed airway of an end and housing and the airway the other end removably connect.
Preferably, the bottom of upright shell is provided with liquid collector.
Preferably, liquid collector is the catheter of water cooler bottom setting and the liquid collecting tank that removably connects with catheter.
Preferably, catheter and liquid collecting tank place also are provided with sleeve pipe companion heat.
Preferably, the pressure of compound tower operation is negative pressure, pressure is-0.1 ~-0.09MPa.
Preferably, the tower reactor service temperature is at 150 ~ 170 ℃.
Adopt the technical solution of the utility model, the profile of compound tower is the upright shell of sealing, in upright shell, horizontally disposed valve tray column is divided into two ones of up and down with it, top is rectifying section, and the bottom is stripping section, is provided with the high efficiency separation structured packing in the rectifying section section, the stripping section inner walls is provided with stainless liner, adopt the compound tower of the utility model structure, can increase production stability, guarantee safety in production; Tower bottom internals are selected two valve tray columns, the above carbon steel that adopts of tower opening for feed cylindrical shell, and structured packing is used in inside, reduces the resistance of tower, enhances productivity; The overhead extraction gas-phase methanol, gas phase pipe, water cooler etc. can use carbon steel equipment, and the liquid collector of extraction dimethyl oxalate at the bottom of tower all uses pitting corrosion resistance, and the outstanding 316L Ultralow Carbon Stainless Steel of high temperature resistant, creep-resistant property reduces corrosion; The pressure of compound tower operation is negative pressure, pressure be-0.1 ~-0.09MPa, the tower reactor service temperature be at 150 ~ 170 ℃, and its purpose is to impel oxalic acid to decompose, and minimizing is corroded; Catheter and liquid collecting tank place also are provided with sleeve pipe companion heat, can enhance productivity; Carry out improvedly on the basis of transformed combination tower at original equipment, cost of investment is low, and the device processes amount after improvement is large, and product separation is effective, has improved the products production rate; Combination tower after improvement has extended online life cycle, has reduced the maintenance of equipment cost.
Description of drawings
The below is briefly described the expressed content of each width accompanying drawing of this specification sheets and the mark in figure:
Fig. 1 is the schematic diagram of the compound tower of a kind of ethylene glycol industrial production of the utility model isolation of intermediate products dimethyl oxalate and methyl alcohol.
Be labeled as in figure: 1, upright shell; 2, filler; 3, separating reaction section; 4, valve tray column; 5, water cooler; 6, opening for feed; 7, catheter; 8, liquid collecting tank; 9, airway; 10, air collector.
Embodiment
The below contrasts accompanying drawing, by the description to embodiment, effect and principle of work, manufacturing process and operation using method etc. to the mutual alignment between the shape of embodiment of the present utility model such as related each member, structure, each several part and annexation, each several part, be described in further detail, with help those skilled in the art to utility model of the present utility model conceive, technical scheme has more complete, accurate and deep understanding.
Fig. 1 is the schematic diagram of the compound tower of a kind of ethylene glycol industrial production of the utility model isolation of intermediate products dimethyl oxalate and methyl alcohol; The compound tower of a kind of ethylene glycol industrial production of the utility model as shown in the figure isolation of intermediate products dimethyl oxalate and methyl alcohol, the upright shell 1 that comprises the sealing of collection device with opening for feed 6, gas-phase methanol and liquid collector, in upright shell, horizontally disposed valve tray column 4 is divided into two ones of up and down with it, top is rectifying section 3, the bottom is stripping section 5, be provided with structured packing 2 in rectifying section 3, water cooler 5 inner walls are provided with stainless liner; Valve tray column 4 is the double-layer structure of the horizontal positioned that be arranged in parallel; The sidewall of upright shell 1 is provided with opening for feed 6, and the bottom of opening for feed 6 is near the valve tray column 4 on upper strata; The top of upright shell 1 is provided with the collection device of gas-phase methanol, and the collection device of gas-phase methanol is the air collector 10 that the affixed airway 9 of an end and upright shell 1 and airway 9 the other ends removably connect; The bottom of upright shell 1 is provided with liquid collector, and liquid collector is the catheter 7 of water cooler 5 bottoms settings and the liquid collecting tank 8 that removably connects with catheter 7; Catheter 7 and liquid collecting tank 8 places also are provided with sleeve pipe companion heat; Adopt the technical solution of the utility model, the profile of compound tower is the upright shell 1 of sealing, the interior horizontally disposed valve tray column 4 of upright shell 1 is divided into two ones of up and down with it, top is separating reaction section 3, and the bottom is water cooler 5, is provided with structured packing 2 in separating reaction section 3, water cooler 5 inner walls are provided with stainless liner, adopt the compound tower of the utility model structure, can increase production stability, guarantee safety in production; Tower bottom internals are selected two valve tray columns, increase production stability; The above carbon steel that adopts of tower opening for feed 6 cylindrical shells, inner use structured packing, the resistance of reduction tower increases production efficiency; The pressure of compound tower operation is negative pressure, pressure be-0.1～-0.09MPa, the tower reactor service temperature be at 150 ~ 170 ℃, preferably is controlled at 160 ℃, decomposes to impel oxalic acid, minimizing is corroded; The overhead extraction gas-phase methanol, airway 9, water cooler 5 etc. can use carbon steel equipment, extraction dimethyl oxalate at the bottom of tower, use the part of carbon steel material all to use pitting corrosion resistance, the outstanding 316L Ultralow Carbon Stainless Steel of high temperature resistant, creep-resistant property, catheter 7 and liquid collecting tank 8 places also are provided with sleeve pipe companion heat, can enhance productivity; Carry out improvedly on the basis of transformed combination tower at original equipment, cost of investment is low, and the device processes amount after improvement is large, and product separation is effective, has improved the products production rate; Combination tower after improvement has extended online life cycle, has reduced the maintenance of equipment cost.
The above is exemplarily described the utility model by reference to the accompanying drawings; obviously the utility model specific implementation is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technical scheme carry out; or without improving, design of the present utility model and technical scheme are directly applied to other occasion, all within protection domain of the present utility model.
Claims (8)
1. the compound tower of an ethylene glycol industrial production isolation of intermediate products dimethyl oxalate and methyl alcohol, comprise have opening for feed, the upright shell of the sealing of the collection device of gas-phase methanol and liquid collector, it is characterized in that: in upright shell, horizontally disposed valve tray column is divided into two ones of up and down with it, top is rectifying section, the bottom is stripping section, be provided with the separation structured packing in the rectifying section section, the stripping section inner walls is provided with stainless liner.
2. according to the compound tower of a kind of ethylene glycol industrial production isolation of intermediate products dimethyl oxalate claimed in claim 1 and methyl alcohol, it is characterized in that: described valve tray column is the double-layer structure of the horizontal positioned that be arranged in parallel.
3. according to the compound tower of a kind of ethylene glycol industrial production isolation of intermediate products dimethyl oxalate claimed in claim 2 and methyl alcohol, it is characterized in that: described opening for feed is positioned at the sidewall of upright shell, and the bottom of opening for feed is near the valve tray column on upper strata.
4. according to the compound tower of a kind of ethylene glycol industrial production isolation of intermediate products dimethyl oxalate claimed in claim 1 and methyl alcohol, it is characterized in that: described gas-phase methanol collection device is arranged on the top of upright shell.
5. according to the compound tower of a kind of ethylene glycol industrial production isolation of intermediate products dimethyl oxalate claimed in claim 4 and methyl alcohol, it is characterized in that: the collection device of described gas-phase methanol is the air collector that the affixed airway of an end and upright shell and the airway the other end removably connect.
6. according to the compound tower of a kind of ethylene glycol industrial production isolation of intermediate products dimethyl oxalate claimed in claim 1 and methyl alcohol, it is characterized in that: described liquid collector is arranged on the bottom of upright shell.
7. according to the compound tower of a kind of ethylene glycol industrial production isolation of intermediate products dimethyl oxalate claimed in claim 6 and methyl alcohol, it is characterized in that: described liquid collector is the catheter of water cooler bottom setting and the liquid collecting tank that removably connects with catheter.
8. according to the compound tower of a kind of ethylene glycol industrial production isolation of intermediate products dimethyl oxalate claimed in claim 6 and methyl alcohol, it is characterized in that: described catheter and liquid collecting tank place also are provided with sleeve pipe companion heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220571276 CN202968431U (en) | 2012-11-01 | 2012-11-01 | Composite tower for separating intermediate products dimethyl oxalate and methanol in industrial production of ethylene glycol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220571276 CN202968431U (en) | 2012-11-01 | 2012-11-01 | Composite tower for separating intermediate products dimethyl oxalate and methanol in industrial production of ethylene glycol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202968431U true CN202968431U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220571276 Expired - Fee Related CN202968431U (en) | 2012-11-01 | 2012-11-01 | Composite tower for separating intermediate products dimethyl oxalate and methanol in industrial production of ethylene glycol |
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| Country | Link |
|---|---|
| CN (1) | CN202968431U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921182A (en) * | 2012-11-01 | 2013-02-13 | 安徽淮化股份有限公司 | Composite tower for separating intermediater products of dimethyl oxalate and carbinol in ethylene glycol industrial production |
| CN105218309A (en) * | 2014-07-03 | 2016-01-06 | 中国石油化工股份有限公司 | Produce the method for ethylene glycol |
| CN105330542A (en) * | 2014-07-03 | 2016-02-17 | 中国石油化工股份有限公司 | Production method of dimethyl oxalate |
| CN106777878A (en) * | 2016-11-22 | 2017-05-31 | 天津大学 | A kind of computational methods of jacket type tower intrinsic frequency |
-
2012
- 2012-11-01 CN CN 201220571276 patent/CN202968431U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921182A (en) * | 2012-11-01 | 2013-02-13 | 安徽淮化股份有限公司 | Composite tower for separating intermediater products of dimethyl oxalate and carbinol in ethylene glycol industrial production |
| CN105218309A (en) * | 2014-07-03 | 2016-01-06 | 中国石油化工股份有限公司 | Produce the method for ethylene glycol |
| CN105330542A (en) * | 2014-07-03 | 2016-02-17 | 中国石油化工股份有限公司 | Production method of dimethyl oxalate |
| AU2015203732B2 (en) * | 2014-07-03 | 2019-04-04 | China Petroleum & Chemical Corporation | Method for producing dimethyl oxalate |
| RU2692099C2 (en) * | 2014-07-03 | 2019-06-21 | Чайна Петролеум Энд Кемикал Корпорейшн | Dimethyl oxalate production method |
| CN106777878A (en) * | 2016-11-22 | 2017-05-31 | 天津大学 | A kind of computational methods of jacket type tower intrinsic frequency |
| CN106777878B (en) * | 2016-11-22 | 2019-07-09 | 天津大学 | A kind of calculation method of jacket type tower intrinsic frequency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20161101 |