CN203648116U - Methylal rectifying tower with solvent addition port - Google Patents

Methylal rectifying tower with solvent addition port Download PDF

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Publication number
CN203648116U
CN203648116U CN201320782318.0U CN201320782318U CN203648116U CN 203648116 U CN203648116 U CN 203648116U CN 201320782318 U CN201320782318 U CN 201320782318U CN 203648116 U CN203648116 U CN 203648116U
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CN
China
Prior art keywords
solvent
tower
rectifying
pipe
dimethoxym ethane
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CN201320782318.0U
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Chinese (zh)
Inventor
黄志平
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惠州市利而安化工有限公司
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Priority to CN201320782318.0U priority Critical patent/CN203648116U/en
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Publication of CN203648116U publication Critical patent/CN203648116U/en

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Abstract

The utility model discloses a methylal rectifying tower with a solvent addition port. The methylal rectifying tower is characterized by mainly comprises a tower body, a reactor, a filler, an input pipe, an output pipe, a liquid suction pump and a material pool, wherein the solvent addition port is arranged on the side wall of the rectifying section of the tower body and above the filler, and the solvent addition port is connected with solvent distributors. According to the methylal rectifying tower disclosed by the utility model, because the solvent addition port is arranged on the side wall of the rectifying section of the tower body and above the filler, the defect of azeotropy is overcome, so that the rectifying and purifying accuracy of a methylal gas is greatly enhanced, and the purity of the methylal gas achieves more than 97%; because the reactor is arranged outside the tower body, not only is the convenience for charging achieved, but also the great convenience for the maintenance of the reactor is achieved; because a waste water discharge pipe is communicated with each solvent distributor through the solvent addition port, the waste water is used as a solvent, so that the waste water is sufficiently utilized, and the characteristics of energy conservation and environmental friendliness are sufficiently reflected.

Description

Add the dimethoxym ethane rectifying column of entrance with solvent

Technical field

The utility model relates to a kind of chemical industry equipment, specifically a kind of dimethoxym ethane rectifying column.

Background technology

Reaction rectification method is collection reaction and a kind of special extract rectification technology that is separated into one, this technology organically combines the engineering characteristic of the process characteristic of course of reaction and separation equipment, can utilize the centrifugation of rectifying to improve the equilibrium conversion of reaction, suppress the generation of series connection side reaction, can utilize again the fuel factor of exothermic reaction to reduce the energy consumption of rectifying, strengthen mass transfer.Therefore, in Chemical Manufacture, obtain applying more and more widely.The experiment that reactive distillation often adopts is the acetic acid acetal synthetic reaction that the esterification under sulfuric acid catalyst exists or formaldehyde and methyl alcohol carry out under sulfuric acid catalyst existence with ethanol.Dimethoxym ethane is C3H8O2.Another name: dimethoxymethane, (the volatilization flammable liquid of structural formula CH2 (OCH3) 2 achromaticity and clarifications, has chloroform smell and pungent taste to methylal.Fusing point-104.8 DEG C, relative density (d204) 0.8560,44 DEG C of boiling points, refractive index (n20 d) solubility 32 ℅ in 1.3513,20 DEG C of water, can dissolve multi-solvents.Purposes: produce ion exchange resin, solvent, spices, thunder rich (synthesizing).Reaction medium: 19.5 DEG C of reaction conditions of 64.7 DEG C of first aldehyde – of formaldehyde (water) 36.5-37.4 ℅ methyl alcohol: control tower top temperature 41.5-42 DEG C of cut and be: dimethoxym ethane carries out reactive distillation process research taking reacting as object of formaldehyde and methyl alcohol condensation production dimethoxym ethane (42.3 DEG C of boiling points).The reaction of synthesizing dimethoxym ethane is: this reaction of 2CH3OH+CH2O=C3H8O2+H2O is the reversible exothermic reaction carrying out under acid catalysis condition, be subject to the restriction of equilibrium conversion, if adopt traditional method separating afterwards of first reacting, even taking the formalin (38%~40%) of high concentration as raw material, the conversion ratio of formaldehyde also can only reach 60% left and right, a large amount of unreacted rare formaldehyde causes difficulty not only to follow-up separation, and the seriously corroded of the formic acid that produces when concentrated of rare formaldehyde to equipment.Adopt the method for reactive distillation can effectively overcome this thermodynamics obstacle of equilibrium conversion, because the size sequence of each component relative volatility is in this reaction system: α dimethoxym ethane > α methyl alcohol > α formaldehyde > α water, visible, because product dimethoxym ethane has maximum relative volatility, utilize the effect of rectifying it constantly can be separated from system, impel balance to move to the direction that generates product, increase substantially the equilibrium conversion of formaldehyde, if the control of raw material proportioning is reasonable, even can reach and approach equilibrium conversion.In addition, adopt reaction rectification technique also tool have the following advantages:

(1) under rational Processes and apparatus condition, can directly obtain qualified dimethoxym ethane product from tower top.

(2) reaction and separation processes carries out in same equipment, can save cost of equipment and operating cost.

(3) reaction heat is directly used in distillation process, capable of reducing energy consumption.

(4) due to the concentrate effect of rectifying, the concentration requirement of raw material formaldehyde is reduced, the formalin that mass percent is 7%-38% all can directly use.

In existing dimethoxym ethane rectifying column, reactor is provided in a side of in tower body, therefore in process of production, very inconvenient to the maintenance of reactor, has the shortcoming that maintenance cost is high, intensity is large; On traditional dimethoxym ethane rectifying column, do not establish colvent inlet, because formaldehyde and methyl alcohol exist the problem of azeotropic, so dimethoxym ethane in rectifying column after rectifying, its purity is not high; In addition, dimethoxym ethane rectifying column is in the process of producing, and waste water is not recycled, therefore wasted a large amount of water resources, does not meet the requirement of energy-conserving and environment-protective.

Summary of the invention

The purpose of this utility model is to provide a kind of purity that improves the rectifying of dimethoxym ethane gas, maintains easily, energy-conserving and environment-protective add the dimethoxym ethane rectifying column of entrance with solvent.

For achieving the above object, the technical solution adopted in the present invention is:

Add the dimethoxym ethane rectifying column of entrance with solvent, it is characterized in that: it is mainly by tower body, reactor, filler, input pipe, efferent duct, drawing liquid pump and material pond form, the top of described tower body is provided with dimethoxym ethane gas discharge outlet, waste water discharge opening is established in the bottom of tower body, the epimere of tower body is rectifying section, hypomere is rectifying section, described reactor is located at outside tower body, filler is located at the rectifying section in tower body, one end of described input pipe extend in tower body and is positioned at the top of filler, the other end is connected with the leakage fluid dram of reactor, described material pond is located at the rectifying section in tower body and is positioned at the below of filler, the bottom in the Yu Liao pond, one end of efferent duct is communicated with, the other end is connected with the liquid inlet of reactor, described drawing liquid pump is located on efferent duct, on the sidewall of the rectifying section of described tower body and the top that is positioned at described filler is provided with solvent and adds entrance, and described solvent adds entrance and is connected with solvent distributor, and described solvent distributor is located in the rectifying section of tower body.

Described reactor, filler, input pipe, efferent duct, drawing liquid pump, material pond, solvent add entrance and solvent distributor forms one group, is provided with altogether many groups, and the many groups of rectifying sections along tower body are separated distribution from top to bottom.

Described solvent distributor is to be made up of main pipe and multiple branched pipe, and multiple branched pipes are spaced apart and be communicated with main pipe on the tube wall of main pipe, are distributed with solvent tap on the tube wall of each branched pipe.

The rectifying section of described tower body is provided with water input, on the waste water discharge opening of described tower body bottom, is connected with wastewater discharge pipe.

External reactor type dimethoxym ethane rectifying column, also comprises circulation pipe and water pump, and one end of described circulation pipe is connected with the tube wall of wastewater discharge pipe, and the other end is connected with water input, and described water pump is located on circulation pipe.

Described wastewater discharge pipe adds entrance by solvent and is communicated with each solvent distributor.

Described dimethoxym ethane gas discharge outlet is connected with condenser by pipeline; The upper end of described tower body is provided with suspension hook.

The beneficial effects of the utility model: due on the sidewall of the rectifying section at tower body and be positioned at described filler above be provided with solvent and add entrance, thereby solve the defect of azeotropic, greatly improve the precision of the rectification and purification of dimethoxym ethane gas, the purity of dimethoxym ethane gas is reached more than 97%; Due to described reactor is located at outside tower body, not only facilitates charging, but also greatly facilitated the maintenance to reactor; Be communicated with each solvent distributor because wastewater discharge pipe adds entrance by solvent, thereby waste water is used as solvent, waste water is fully used, fully demonstrated the feature of energy-conserving and environment-protective.

Brief description of the drawings

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:

Fig. 1 is structural representation of the present invention;

Fig. 2 is the structural representation that solvent distributor shown in Fig. 1 amplifies.

In figure: 1, tower body; 2, reactor; 3, filler; 4, input pipe; 5, efferent duct; 6, drawing liquid pump; 7, material pond; 8, dimethoxym ethane gas discharge outlet; 9, waste water discharge opening; 10, water input; 11, wastewater discharge pipe; 12, circulation pipe; 13, water pump; 14, suspension hook; 15, solvent adds entrance; 16, solvent distributor; 17, main pipe; 18, branched pipe; 19, solvent tap.

Detailed description of the invention

As shown in Figure 1, add the dimethoxym ethane rectifying column of entrance with solvent, it is mainly by tower body 1, reactor 2, filler 3, input pipe 4, efferent duct 5, drawing liquid pump 6 and material pond 7 form, the top of described tower body 1 is provided with dimethoxym ethane gas discharge outlet 8, waste water discharge opening 9 is established in the bottom of tower body 1, the epimere of tower body 1 is rectifying section, hypomere is rectifying section, described reactor 2 is located at outside tower body 1, filler 3 is located at the rectifying section in tower body 1, one end of described input pipe 4 extend in tower body 1 and is positioned at the top of filler 3, the other end is connected with the leakage fluid dram of reactor 2, described material pond 7 is located at the rectifying section in tower body 1 and is positioned at the below of filler 3, the bottom in the Yu Liao pond, one end 7 of efferent duct 5 is communicated with, the other end is connected with the liquid inlet of reactor 2, described drawing liquid pump 6 is located on efferent duct 5.On the sidewall of the rectifying section of described the tower body 1 and top that is positioned at described filler 3 is provided with solvent and adds entrance 15, and described solvent adds entrance 15 and is connected with solvent distributor 16, and described solvent distributor 16 is located in the rectifying section of tower body 1.Described reactor 2, filler 3, input pipe 4, efferent duct 5, drawing liquid pump 6, material pond 7, solvent add entrance 15, solvent distributor 16 forms one group, is provided with altogether many groups, and the many groups of rectifying sections along tower body 1 are separated distribution from top to bottom.

The rectifying section of tower body 1 is provided with water input 10, on the waste water discharge opening 9 of described tower body bottom, is connected with wastewater discharge pipe 11.Also comprise circulation pipe 12 and water pump 13, one end of described circulation pipe 12 is connected with the tube wall of wastewater discharge pipe 9, the other end is connected with water input 10, and described water pump 13 is located on circulation pipe 12, and wastewater discharge pipe 11 adds entrance 15 by solvent and is communicated with each solvent distributor 16.

The upper end of tower body 1 is provided with suspension hook 14.Dimethoxym ethane gas discharge outlet 9 is connected with condenser by pipeline.

As shown in Figure 2, described solvent distributor 16 is to be made up of main pipe 17 and multiple branched pipe 18, and multiple branched pipes 18 are spaced apart and be communicated with main pipe 17 on the tube wall of main pipe 17, are distributed with solvent tap 19 on the tube wall of each branched pipe 18.

The above is preferred embodiment of the present utility model; certainly can not limit with this interest field of the utility model; should be understood that; for those skilled in the art; the technical solution of the utility model is modified or is equal to replacement, do not depart from the protection domain of technical solutions of the utility model.

Claims (7)

1. one kind adds the dimethoxym ethane rectifying column of entrance with solvent, it is characterized in that: it is mainly by tower body, reactor, filler, input pipe, efferent duct, drawing liquid pump and material pond form, the top of described tower body is provided with dimethoxym ethane gas discharge outlet, waste water discharge opening is established in the bottom of tower body, the epimere of tower body is rectifying section, hypomere is rectifying section, described reactor is located at outside tower body, filler is located at the rectifying section in tower body, one end of described input pipe extend in tower body and is positioned at the top of filler, the other end is connected with the leakage fluid dram of reactor, described material pond is located at the rectifying section in tower body and is positioned at the below of filler, the bottom in the Yu Liao pond, one end of efferent duct is communicated with, the other end is connected with the liquid inlet of reactor, described drawing liquid pump is located on efferent duct, on the sidewall of the rectifying section of described tower body and the top that is positioned at described filler is provided with solvent and adds entrance, and described solvent adds entrance and is connected with solvent distributor, and described solvent distributor is located in the rectifying section of tower body.
2. the dimethoxym ethane rectifying column that adds entrance with solvent according to claim 1, it is characterized in that: described reactor, filler, input pipe, efferent duct, drawing liquid pump, material pond, solvent add entrance and solvent distributor forms one group, be provided with altogether many groups, the many groups of rectifying sections along tower body are separated distribution from top to bottom.
3. the dimethoxym ethane rectifying column that adds entrance with solvent according to claim 1 and 2, it is characterized in that: described solvent distributor is to be made up of main pipe and multiple branched pipe, multiple branched pipes are spaced apart and be communicated with main pipe on the tube wall of main pipe, are distributed with solvent tap on the tube wall of each branched pipe.
4. the dimethoxym ethane rectifying column that adds entrance with solvent according to claim 3, is characterized in that: the rectifying section of described tower body is provided with water input, on the waste water discharge opening of described tower body bottom, is connected with wastewater discharge pipe.
5. the dimethoxym ethane rectifying column that adds entrance with solvent according to claim 4, it is characterized in that: also comprise circulation pipe and water pump, one end of described circulation pipe is connected with the tube wall of wastewater discharge pipe, and the other end is connected with water input, and described water pump is located on circulation pipe.
6. the dimethoxym ethane rectifying column that adds entrance with solvent according to claim 4, is characterized in that: described wastewater discharge pipe adds entrance by solvent and is communicated with each solvent distributor.
7. the dimethoxym ethane rectifying column that adds entrance with solvent according to claim 4, is characterized in that: described dimethoxym ethane gas discharge outlet is connected with condenser by pipeline; The upper end of described tower body is provided with suspension hook.
CN201320782318.0U 2013-12-03 2013-12-03 Methylal rectifying tower with solvent addition port CN203648116U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103657129A (en) * 2013-12-03 2014-03-26 惠州市利而安化工有限公司 Methylal rectifying tower with solvent feeding ports
WO2016003498A1 (en) * 2014-07-03 2016-01-07 Chevron U.S.A. Inc. Reactor for ionic liquid catalyzed alkylation based on motionless mixer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103657129A (en) * 2013-12-03 2014-03-26 惠州市利而安化工有限公司 Methylal rectifying tower with solvent feeding ports
WO2016003498A1 (en) * 2014-07-03 2016-01-07 Chevron U.S.A. Inc. Reactor for ionic liquid catalyzed alkylation based on motionless mixer
US10173194B2 (en) 2014-07-03 2019-01-08 Chevron U.S.A. Inc. Systems for ionic liquid catalyzed alkylation based on a modular reactor

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