CN204162632U - A kind of high-concentration methylal Backpack type cycle production process device - Google Patents
A kind of high-concentration methylal Backpack type cycle production process device Download PDFInfo
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- CN204162632U CN204162632U CN201420167255.2U CN201420167255U CN204162632U CN 204162632 U CN204162632 U CN 204162632U CN 201420167255 U CN201420167255 U CN 201420167255U CN 204162632 U CN204162632 U CN 204162632U
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Abstract
The utility model discloses a kind of high-concentration methylal Backpack type cycle production process device, mainly comprise pre-reactor, reactive distillation column, rectifying tower and pressure distillation tower, described reactive distillation column comprises rectifying section and conversion zone, conversion zone is the multilayered structure be communicated with up and down, and every layer is all connected to form circulation by pipeline and single Backpack type reactor; The outlet of described pre-reactor is connected with the entrance of reactive distillation column by pipeline, being connected with rectifying column inlet by pipeline of reactive distillation column overhead; Be connected to form circulation by pipeline and reactive distillation column overhead at the bottom of the tower of described rectifying tower, described return tank is also provided with branch road and circulates with the tower top of rectifying tower and be connected.The utility model is by the tower process by reaction and rectifying, be divided into two tower process of reaction and rectifying, while the turnover ratio that effectively can improve methylal obtains the high-concentration methylal more than 99.5%, the height of the reactive distillation column of prior art is reduced greatly, thus reduces investment.
Description
Technical field
The utility model relates to methylal production technical field, particularly relates to the production technology that concentration is the high-concentration methylal of more than 99.9%.
Background technology
Methylal has excellent physicochemical property, namely good solubility, lower boiling, with aqueous phase dissolubility good, can be widely used in the products such as makeup, medicine, household supplies, industrial automotive articles for use, sterilant, leather polish, sanitising agent, rubber industry, paint, ink, also because methylal (109-87-5) has good ability of cleaning greasy dirt and volatility, F11 and F113 and chlorinated solvents can be substituted as sanitising agent, therefore be replacement fluorine Lyons, reduce volatile organic matter (VOCs) discharge, reduce the environmentfriendly products to topsoil.Development in recent years is very fast, especially presents good application development prospect at aerosol sectors.
Current domestic high-concentration methylal has two kinds of techniques, and one is extraction process, and the methylal technique of extraction needs solvent, and the loss of solvent pollutes, and the recovery of solvent simultaneously needs energy consumption, causes product energy consumption high, complex process.Another kind is compression rectification, and the production process equipment investment of the methylal of compression rectification method is originally comparatively large, and methylal waste water COD content is comparatively large, more difficult, causes product cost high.
Utility model content
Utility model object: for above-mentioned Problems existing and defect, the utility model provides a kind of high-concentration methylal Backpack type cycle production process device and method, and flow process is simpler, less investment, waste water content is low, by product is few and energy consumption is low advantage.
Technical scheme: for realizing above-mentioned utility model object, the utility model is by the following technical solutions: a kind of high-concentration methylal Backpack type cycle production process device, comprise pre-reactor, reactive distillation column, rectifying tower, pressure distillation tower, Backpack type reactor, reboiler, evaporative condenser and return tank, described reactive distillation column, the bottom of rectifying tower and pressure distillation tower is equipped with reboiler, described reactive distillation column comprises rectifying section and is located at the conversion zone on top, conversion zone is the multilayered structure be communicated with up and down, every layer is all connected to form circulation by pipeline and single Backpack type reactor, the outlet of described pre-reactor is connected with the entrance of reactive distillation column by pipeline, being connected with rectifying column inlet by pipeline of reactive distillation column overhead, rectifying tower tower top then connects evaporative condenser and return tank successively, and return tank is connected with pressure distillation tower by pipeline again, wastewater outlet is provided with at the bottom of the tower of described reactive distillation column, reflux cycle is connected to form by the tower top of pipeline and reactive distillation column at the bottom of the tower of described rectifying tower, described return tank is also provided with branch road and circulates with the tower top of rectifying tower and be connected, and the tower top of described pressure distillation tower forms heat exchange circulation passage by pipeline and the supporting reboiler of reactive distillation column simultaneously.
As preferably, at the bottom of the tower of described pressure distillation tower, be also connected with adsorption tanks and products pot in turn by pipeline.
As preferably, described Backpack type reactor is 8, and setting relatively independent with reactive distillation column.
As preferably, described pre-reactor is the fixed bed catalyst reactors of two series connection, and is furnished with the fixed bed catalyst reactor of adapted.
As preferably, after described pressure distillation column overhead carries out heat exchange by pipeline and the supporting reboiler of reactive distillation column, then be connected with pressure distillation tower and rectifying tower respectively by pipeline.
Beneficial effect: compared with prior art, the utility model has the following advantages: change two tower process into by an original tower process, can reduce the height of tower, greatly reduce facility investment; 8 reactors of reactive distillation column, can make not in formaldehyde, the methyl alcohol continuation reaction of pre-reactor complete reaction, until complete reaction.Make the waste water COD≤30ppm at the bottom of reactive distillation column, directly reach emission standard; Methylal plate-type condenser is changed for energy-conservation evaporative condenser, high without heat exchange efficiency, also save the investment of the floor space of circulating water pool and pipeline, pump, and save the consumption of power consumption and water, reduce production cost.
Accompanying drawing explanation
Fig. 1 is the technological process of production schematic diagram of described high-concentration methylal of the present utility model.
Wherein, pre-reactor 1, reactive distillation column 2, Backpack type reactor 3, rectifying tower 4, evaporative condenser 5, return line 6, pressure distillation tower 7, reboiler 8.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
As shown in Figure 1, a kind of technological process of production of high-concentration methylal, pre-reactor is sent into after raw material formaldehyde and methanol mixed, after the methylal generated through reaction, water and the formaldehyde do not reacted, the reacted solution of methyl alcohol enter reactive distillation column, in conversion zone, responseless formaldehyde and methyl alcohol are by reactor pump circulation feeding 8 Backpack type reactors, and after reaction in Backpack type reaction, Posterior circle sends reactive distillation column back to.Successively after 8 side reactors, through reactive distillation, methylal and methyl alcohol are gone out to enter follow-up rectifying tower from reactive distillation column overhead and are separated further, after the water that reacted water and methylal generate sends into surge tank buffering at the bottom of tower after pump extraction, evaporative condenser is sent into again through overcooling, as the make up water of evaporative condenser, thus can water saving.Methylal in rectifying tower and methyl alcohol are through being separated, and the water at the bottom of rectifying tower, methylal, methyl alcohol are through the backflow of reflux pump as reactive distillation column; The methylal of 92% enters return tank from rectifying tower tower top after evaporative condenser condensation.A part is as the backflow of rectifying tower, and a part enters pressure distillation tower, and in pressurizing tower, methylal and methyl alcohol are through being separated, the methylal of 99.5% at the bottom of tower as product extraction.The methylal of pressurizing tower tower top and methyl alcohol heat as the thermal source reboiler of reactive distillation column, and condensation rear portion goes pressurizing tower to reflux, and a part goes rectifying tower rectifying.
Because this technique adopts solid acid as catalyzer, reaction and rectifying are separated, not at a chemical industry equipment device, the height of equipment can be reduced like this, reduce investment outlay; 8 reactors of simultaneous reactions rectifying tower, methyl alcohol and formaldehyde can more fully be reacted, and the COD content of waste water is low, reaches emission standard.The gas of pressurizing tower, as the thermal source of reactive distillation column, replaces steam heating, makes heat recovery and utilization.And the cost of product.Following table is the contrast of the utility model processing method and prior art.Therefore this technique is by a tower process of just reaction and rectifying, be divided into two tower process of reaction and rectifying, while the turnover ratio that effectively can improve methylal obtains the high-concentration methylal more than 99.5%, the height of the reactive distillation column of prior art is reduced greatly, thus reduces investment; In addition, this technique also adopts multiple reflux cycle and thermal source more than needed, reduces discharge of wastewater and heat energy consumption.
Starting material and power consumption contrast (in per ton 99.5%) in each technique
Claims (5)
1. a high-concentration methylal Backpack type cycle production process device, it is characterized in that: comprise pre-reactor, reactive distillation column, rectifying tower, pressure distillation tower, Backpack type reactor, reboiler, evaporative condenser and return tank, the bottom of described reactive distillation column, rectifying tower and pressure distillation tower is equipped with reboiler, described reactive distillation column comprises rectifying section and is located at the conversion zone on top, conversion zone is the multilayered structure be communicated with up and down, and every layer is all connected to form circulation by pipeline and single Backpack type reactor; The outlet of described pre-reactor is connected with the entrance of reactive distillation column by pipeline, being connected with rectifying column inlet by pipeline of reactive distillation column overhead, rectifying tower tower top then connects evaporative condenser and return tank successively, and return tank is connected with pressure distillation tower by pipeline again; Wastewater outlet is provided with at the bottom of the tower of described reactive distillation column, reflux cycle is connected to form by the tower top of pipeline and reactive distillation column at the bottom of the tower of described rectifying tower, described return tank is also provided with branch road and circulates with the tower top of rectifying tower and be connected, and the tower top of described pressure distillation tower forms heat exchange circulation passage by pipeline and the supporting reboiler of reactive distillation column simultaneously.
2. high-concentration methylal Backpack type cycle production process device according to claim 1, is characterized in that: be also connected with adsorption tanks and products pot in turn by pipeline at the bottom of the tower of described pressure distillation tower.
3. high-concentration methylal Backpack type cycle production process device according to claim 1, is characterized in that: described Backpack type reactor is 8, and setting relatively independent with reactive distillation column.
4. high-concentration methylal Backpack type cycle production process device according to claim 1, is characterized in that: described pre-reactor is the fixed bed catalyst reactors of two series connection, and is furnished with the fixed bed catalyst reactor of adapted.
5. high-concentration methylal Backpack type cycle production process device according to claim 1, it is characterized in that: after described pressure distillation column overhead carries out heat exchange by pipeline and the supporting reboiler of reactive distillation column, then be connected with pressure distillation tower and rectifying tower respectively by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167255.2U CN204162632U (en) | 2014-04-08 | 2014-04-08 | A kind of high-concentration methylal Backpack type cycle production process device |
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| CN201420167255.2U CN204162632U (en) | 2014-04-08 | 2014-04-08 | A kind of high-concentration methylal Backpack type cycle production process device |
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| CN204162632U true CN204162632U (en) | 2015-02-18 |
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| CN201420167255.2U Expired - Fee Related CN204162632U (en) | 2014-04-08 | 2014-04-08 | A kind of high-concentration methylal Backpack type cycle production process device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896747A (en) * | 2014-04-08 | 2014-07-02 | 江苏凯茂石化科技有限公司 | Backpack type circulation production process device of high-concentration methylal |
-
2014
- 2014-04-08 CN CN201420167255.2U patent/CN204162632U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896747A (en) * | 2014-04-08 | 2014-07-02 | 江苏凯茂石化科技有限公司 | Backpack type circulation production process device of high-concentration methylal |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180828 Address after: 214000 Jinxi Road, Wuxi City, Jiangsu Province, No. 100 Patentee after: WUXI ZHIGUI TECHNOLOGY CO., LTD. Address before: 214000 building 50, Heng Hua Science and Technology Park (Jiangnan South Gate), 58 Xiu Xiu Road, Binhu District, Wuxi, Jiangsu Patentee before: Jiangsu Kaimao Chemical Technology Co., Ltd. |
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| 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: 20150218 Termination date: 20200408 |