CN100430112C - Gas chilled absorbing tower - Google Patents
Gas chilled absorbing tower Download PDFInfo
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- CN100430112C CN100430112C CNB2005101114706A CN200510111470A CN100430112C CN 100430112 C CN100430112 C CN 100430112C CN B2005101114706 A CNB2005101114706 A CN B2005101114706A CN 200510111470 A CN200510111470 A CN 200510111470A CN 100430112 C CN100430112 C CN 100430112C
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Abstract
A suddenly cooling-absorption tower of gas for the industrial apparatus used to prepare sulfuric acid, ethene, nitrile, etc features that the 1/4-1/3 length of a gas inlet tube has no opening, the residual length of said gas inlet tube has upward opening whose vertical length is equal to the 1/3-1/2 of tube diameter, and the upward residual part has the symmetrical two outlet slots whose radian is equal to the 1/6=1/4 of arc length.
Description
Technical field
The present invention relates to a kind of void tower equipment of gas chilled absorption.
Background technology
In many chemical production devices, absorption and chilling are very important two unit.After gas-phase reaction finishes, generally all need to utilize absorptive unit to absorb the gas-phase reaction product, and then obtain satisfactory product through the later separation purifier units.Therefore, absorb or the quality of chilling, directly have influence on the product recovery rate and the production cost of products of whole chemical plant installations, using maximum absorption towers and quench tower at present is conventional packed tower or plate column.
Document JP 80104246 has been introduced a kind of chilling of acrylonitrile and has been absorbed neutralizing tower equipment, and the hypomere of its tower is the Raschig ring filler, and each section of top is the structure of sieve-plate tower.Solid impurity and high-viscosity polymer contained in the gas feed of this invention are a lot, and operation forms easily and stops up in the filler environment, finally causes gas passage and fluid passage skewness, and gas-liquid heat-transfer and mass-transfer efficiency are not high.In addition, the control of the pressure in the tower requires high.Claim according to this patent, in the absorption and gas feed in unreacted ammonia effect be about 90%.Acrylonitrile is still very big at the polymerization losses of this tower and unreacted ammonia.
Introduced the another kind of tower that is used to absorb with chilling in the document " GAS ABSORPTION " (B.M. draws nurse, Chemical Industry Press, 1985).This class tower mostly adopts plank frame, as bubble cap plate, and sieve tray and valve plate.Though it is big that this type of tower can adapt to load variations, require in the high device of operating flexibility, the pressure drop that this type of tower requires is big.In reaction system is under the situation of normal pressure or low pressure, and the pressure that reacted product gas has is not high usually, therefore is difficult to meet the desired pressure of this type of tower and falls.In addition, exist certain gradient of liquid level on column plate, gas can not distributed on the column plate equably: lower near liquid level on that part of column plate of downflow weir, from then on most of gas pass through, and causes the skewness of gas in tower.This phenomenon is particularly evident in the equipment of big tower diameter.
Above-mentioned document all is that requirement gas has certain pressure head, and does not contain solid suspended impurity and other high viscosity liquid polymer.Owing to stop up and the gas skewness, caused the interior gas-liquid contact of tower bad, gas-liquid heat-transfer and mass-transfer efficiency are not high.Therefore in the high system of some normal pressure systems and impurity content, they all can't use expeditiously.
Summary of the invention
Technical problem to be solved by this invention be overcome in the prior art absorb and quenching process in the gas-liquid loose contact that produced, heat transfer and mass-transfer efficiency are not high, the conventional absorption and shortcoming that fast cooling device can't high-efficiency operation provides a kind of new chilled absorbing tower in normal pressure system and high pollution system.This chilled absorbing tower has the obstruction of being difficult for, uniform gas-liquid distribution, and the efficient height of gas-liquid heat-transfer and mass transfer in the tower requires low characteristics to the system pressure head.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of gas chilled absorbing tower, at least form for two sections by epimere and hypomere, catch tray is arranged in the middle of epimere and the hypomere, riser is arranged on the catch tray, epimere is the column plate type structure of hollow-spraying-tower formula structure or 1～5 block of column plate, hypomere is the spray structure that contains the gas redistributor, spray structure is positioned at below the catch tray, above the gas redistributor, gas inlet tube is positioned at below the gas redistributor, it is characterized in that gas inlet tube moves towards not opening of 1/4～1/3 tube side part along gas, remainder is towards upper shed, and the vertical range of opening portion is 1/3～1/2 of an import caliber; The remainder of opening pipeline has two outlet slots along the pipe range symmetry up, each outlet slot radian size be opening pipeline up remainder circular arc arc length 1/6～1/4.
In the technique scheme, the hypomere spray number of plies is 1～5 layer, and the setting angle α of nozzle is 0～180 ° in the spray structure, and preferable range is 0～60 ° or 120～180 °, press regular geometric shapes with one deck nozzle and arrange, regular geometric shapes is concentric circles, rectangle, square or equilateral triangle.Epimere is the column plate type structure of 1～5 block of column plate, and column plate is reverse-flow double overflow column plate.Gas redistributor preferred version is to be made up of 1～20 taper shape or oval taper unit piece, and unit piece is pressed tower vertical axis symmetric arrays, and gas redistributor height is 30%～100% of a gas feed caliber.The gas inlet tube preferred version be gas inlet tube not opening portion seal with the contacted perpendicular end surface of opening portion up.
The present invention has eliminated gas and hit the asymmetric distribution that wall oppositely rises again after advancing tower by special air feeder structure.Under the effect of gas redistributor, gas obtains further homogenization.Simultaneously liquid phase preferably adopts the spray mode of multidirectional multilayer, can regulate the direction of nozzle spray and the number of plies of spray, reaches liquid phase to be distributed with pointedly distribute corresponding with gas phase.This kind way of contact, the gas-liquid contact is more abundant, and heat transfer and mass-transfer efficiency are greatly improved, and absorption and chilling are rapid, have reduced the time of staying of gas-liquid in tower, have reduced energy consumption, have improved absorption efficiency.In addition, because hypomere is the void tower structure, be difficult for being stopped up by solid impurity and/or other high-viscosity polymer impurity.At each section of multisection type void tower its upper side, owing to require every section independently liquid phase circulated sprinkling pattern is arranged, therefore require the uprising gas passage that certain height is arranged, carry out the liquid phase circulated sprinkling so that form certain liquid level.But uprising gas exists the problem of distribution of gas inequality by behind the gas passage between gas passage, influences the gas-liquid contact of each section of top, reduces the effect of absorption and chilling.After each section of top increased cross flow tower plate, gas has obtained redistribution, and was more even, and the gas-liquid contact is more abundant, and gas-liquid heat-transfer and mass-transfer efficiency improve greatly, and the effect of absorption and chilling has had very big improvement.Commercial plant is used proof: the present invention can make whole plant energy consumption reduce by 15%～30%, and the absorption efficiency of major product improves about 15%, has obtained better technical effect.
Description of drawings
Fig. 1 is chilled absorbing tower equipment of the present invention and technological process;
Fig. 2 is gas inlet tube of the present invention and E-E cross section and A-A schematic cross-section;
Fig. 3 A is a gas redistributor of the present invention;
Fig. 3 B is a gas redistributor unit piece of the present invention;
Fig. 4 A is the spraying layer set-up mode;
Fig. 4 B is the arrangement mode of nozzle;
Fig. 4 C is the mounting means of nozzle.
1 is void tower equipment among Fig. 1～Fig. 4, and 2 is gas feed, and 3 is the gas redistributor, 4 is column plate, 5 uprising gas passages, and 6 is nozzle, 7 is hypomere circulated sprinkling liquid, 8 is absorption liquid, and 9 for absorbing tail gas, and 10 is gas inlet tube, 11 is epimere circulated sprinkling liquid, 12 is uprising gas, and L1, L2, L3, L4 are spraying layer, and α is the installation direction of nozzle and the angle of cut of vertical plane.
Among Fig. 1, gas feed 2 enters the void tower bottom by gas inlet tube 10, is undertaken one by gas redistributor 3 Inferior again distribution is then with circulated sprinkling liquid 7 reverse contacts by chilling, absorption; Circulated sprinkling liquid 7 is connecing with gas feed 2 Discharge from tower reactor after touching absorption, an absorption liquid part enters subsequent treatment workshop section, and a part circulates as circulated sprinkling liquid Spray. Gaseous state chilling effluent after the quench tower lower portion contact rises to the tower epimere through the uprising gas passage, by the epimere tower After plate 4 distributes again, with circulated sprinkling liquid 11 reverse contacts by further chilling and absorption; An absorption liquid part Enter in the subsequent treatment unit with the merging of hypomere absorption liquid, a part is carried out circulated sprinkling as circulated sprinkling liquid. Tail after absorbing Gas is discharged from cat head, enters subsequent treatment workshop section.
In the preferred version of gas inlet tube, opening portion does not seal with the perpendicular end surface of opening portion up. Fig. 2 A Dash area in the-A schematic cross-section namely represents the part of sealing.
The invention will be further elaborated below by embodiment.
The specific embodiment
[comparative example 1]
By weight percentage, gas feed consists of: acrylonitrile 12.3, and acetonitrile 0.5, hydrogen cyanide 1.5, methacrylaldehyde 0.1, acrylic acid 0.1, ammonia 0.5, other are 85.0 years old.Flow is 49 kilograms/hour, and 220 ℃ of feeding temperatures adopt in the aqueous sulfuric acid and absorption ammonia.Utilize two-period form absorption tower equipment in the document JP 80104246, wherein the tower hypomere is the Raschig ring filler, and epimere is a column plate, and the number of plates is 5.Experimental results show that: the efficient that neutralization absorbs ammonia is 80.5%, and energy consumption is 232 kilowatts of/kilogram acrylonitrile.
[comparative example 2]
In percent by volume, gas feed consists of: CO
230.2 CO 4, H
248, N
217.8; Flow is 905 kilograms/hour, and 85 ℃ of feeding temperatures adopt 25 ℃ the aqueous solution to absorb CO
2Utilize one section column plate type absorption tower equipment, the valve plate number is 5, adopts common air inlet pipe and does not have the gas redistributor.Experimental results show that: absorb CO
2Efficient be 82%.
[embodiment 1]
By weight percentage, gas feed consists of: acrylonitrile 12.3, and acetonitrile 0.5, hydrogen cyanide 1.5, methacrylaldehyde 0.1, acrylic acid 0.1, ammonia 0.5, other are 85.0 years old.Flow is 9.25 kilograms/hour, and 220 ℃ of feeding temperatures adopt in the aqueous sulfuric acid and absorption ammonia.Utilize two-period form tower of the present invention, the hypomere spray is 5 layers, and the nozzle setting angle is 0 °, 30 °, 150 ° three kinds; The epimere spray is 3 layers, and the nozzle setting angle is 0 °, 180 ° two kinds, and the epimere number of plates is 2; Press rounded projections arranged with one deck nozzle.Gas inlet tube moves towards not opening of 1/4 tube side part along gas, and remainder is towards upper shed, and the vertical range of opening portion is 1/3 of an import caliber; Outlet slot radian size be up remainder circular arc arc length 1/4.The gas redistributor is made up of 10 conical unit pieces, highly is 60% of gas feed caliber.The efficient that neutralization absorbs ammonia is 95.0%, and the energy consumption of commercial plant is 195.0 kilowatts of/kilogram acrylonitrile.
[embodiment 2]
By weight percentage, gas feed consists of: acrylonitrile 12.3, and acetonitrile 0.5, hydrogen cyanide 1.5, methacrylaldehyde 0.1, acrylic acid 0.1, ammonia 0.5, other are 85.0 years old.Flow is 9.25 kilograms/hour, and 220 ℃ of feeding temperatures adopt in the aqueous sulfuric acid and absorption ammonia.Utilize two-period form tower of the present invention, the hypomere spray is 3 layers, and the nozzle setting angle is 0 °, 30 °, 180 ° three kinds; The epimere spray is 2 layers, and the nozzle setting angle is 0 °, 150 ° two kinds, and the epimere number of plates is 2; Press rectangular arranged with one deck nozzle.Gas inlet tube moves towards not opening of 1/3 tube side part along gas, and remainder is towards upper shed, and the vertical range of opening portion is 1/2 of an import caliber; Outlet slot radian size be up remainder circular arc arc length 1/4.The efficient that neutralization absorbs ammonia is 93.5%, and the energy consumption of commercial plant is 197.5 kilowatts of/kilogram acrylonitrile.
[embodiment 3]
By weight percentage, gas feed consists of: acrylonitrile 12.3, and acetonitrile 0.5, hydrogen cyanide 1.5, methacrylaldehyde 0.1, acrylic acid 0.1, ammonia 0.5, other are 85.0 years old.Flow is 9.25 kilograms/hour, and 220 ℃ of feeding temperatures adopt in the aqueous sulfuric acid and absorption ammonia.Utilize two-period form tower of the present invention, the hypomere spray is 3 layers, and the nozzle setting angle is 0 °, 150 °, 180 ° three kinds, and the epimere spray is 3 layers, and the nozzle setting angle is 0 °, and the epimere number of plates is 1; Press square arrangement with one deck nozzle.Gas inlet tube moves towards not opening of 1/3 tube side part along gas, and remainder is towards upper shed, and the vertical range of opening portion is 1/2 of an import caliber; Outlet slot radian size be up remainder circular arc arc length 1/6.The gas redistributor is made up of 6 oval taper unit pieces, highly is 100% of gas feed caliber.The efficient that neutralization absorbs ammonia is 96.3%, and the energy consumption of commercial plant is 188 kilowatts of/kilogram acrylonitrile.
[embodiment 4]
In percent by volume, gas feed consists of: CO
230.2 CO 4, H
248, N
217.8; Flow is 905 kilograms/hour, and 85 ℃ of feeding temperatures adopt 25 ℃ the aqueous solution to absorb CO
2Utilize one-part form tower of the present invention, the liquid phase circulated sprinkling is 3 layers, and the nozzle setting angle is 0 °, 180 ° two kinds, presses square arrangement with one deck nozzle.Gas inlet tube moves towards not opening of 1/4 tube side part along gas, and remainder is towards upper shed, and the vertical range of opening portion is 1/2 of an import caliber; Outlet slot radian size be up remainder circular arc arc length 1/6.Gas inlet tube not opening portion seals with the perpendicular end surface of opening portion up.The gas redistributor is made up of 12 conical unit pieces, highly is 80% of gas feed caliber.Experimental results show that: absorb CO
2Efficient be 93.6%.
Claims (6)
1, a kind of gas chilled absorbing tower, at least form for two sections by epimere and hypomere, catch tray is arranged in the middle of epimere and the hypomere, riser is arranged on the catch tray, epimere is the column plate type structure of hollow-spraying-tower formula structure or 1～5 block of column plate, hypomere is the spray structure that contains the gas redistributor, spray structure is positioned at below the catch tray, above the gas redistributor, gas inlet tube is positioned at below the gas redistributor, it is characterized in that gas inlet tube moves towards not opening of 1/4～1/3 tube side part along gas, remainder is towards upper shed, and the vertical range of opening portion is 1/3～1/2 of an import caliber; The remainder of opening pipeline has two outlet slots along the pipe range symmetry up, each outlet slot radian size be opening pipeline up remainder circular arc arc length 1/6～1/4.
2, according to the described gas chilled absorbing tower of claim 1, it is characterized in that the hypomere spray number of plies is 1～5 layer, the setting angle α of nozzle is 0～180 ° in the spray structure, presses regular geometric shapes with one deck nozzle and arranges, and regular geometric shapes is concentric circles, rectangle, square or equilateral triangle.
3, according to the described gas chilled absorbing tower of claim 2, the setting angle α that it is characterized in that nozzle in the spray structure is 0～60 ° or 120～180 °.
4, according to the described gas chilled absorbing tower of claim 1, it is characterized in that epimere is the column plate type structure of 1～5 block of column plate, column plate is reverse-flow double overflow column plate.
5, according to the described gas chilled absorbing tower of claim 1, it is characterized in that described gas redistributor is made up of 1～20 taper shape or oval taper unit piece, unit piece is pressed tower vertical axis symmetric arrays, and gas redistributor height is 30%～100% of a gas feed caliber.
6, according to the described gas chilled absorbing tower of claim 1, it is characterized in that described gas inlet tube not opening portion seal with the contacted perpendicular end surface of opening portion up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101114706A CN100430112C (en) | 2005-12-14 | 2005-12-14 | Gas chilled absorbing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101114706A CN100430112C (en) | 2005-12-14 | 2005-12-14 | Gas chilled absorbing tower |
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| CN1981912A CN1981912A (en) | 2007-06-20 |
| CN100430112C true CN100430112C (en) | 2008-11-05 |
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| CN101837220A (en) * | 2010-04-30 | 2010-09-22 | 蒋超 | Zinc electrolyte cooling acid mist treatment tower |
| CN104548818A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Device and method for increasing washing efficiency of catalyst in reactant gas |
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| CN104941419A (en) * | 2014-03-31 | 2015-09-30 | 英尼奥斯欧洲股份公司 | Modified ammonia removal system of reactor effluent |
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| CN105983314A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Automatic control device and method for amount of acid added into neutralization tower |
| CN105983315A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Multilevel spraying device and neutralization method |
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| CN105983317A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Ammonia neutralization device |
| CN105983323A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Spraying device and neutralization method |
| CN105983318A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Acid addition level regulating device for neutralization reaction tower |
| CN105983316A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Spraying equipment and method for neutralization reaction |
| CN105983320A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Water replenishing device of quench tower |
| CN105509062B (en) * | 2016-01-20 | 2017-07-07 | 南京工业大学 | Full-scale continuous pyrolysis incineration device for electronic and electric appliance wastes |
| CN109569199B (en) * | 2018-09-28 | 2024-02-20 | 中国华电科工集团有限公司 | Flue gas treatment device |
| CN109821382B (en) * | 2019-02-18 | 2024-01-30 | 中国华电科工集团有限公司 | Single tower desulfurizing and whitening device |
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