CN106699521A - M1 removal tower gas phase condensation system in DMMn refining device - Google Patents
M1 removal tower gas phase condensation system in DMMn refining device Download PDFInfo
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- CN106699521A CN106699521A CN201610680457.0A CN201610680457A CN106699521A CN 106699521 A CN106699521 A CN 106699521A CN 201610680457 A CN201610680457 A CN 201610680457A CN 106699521 A CN106699521 A CN 106699521A
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Abstract
The invention discloses a M1 removal tower gas phase condensation system in a DMMn refining device. The system comprises a M1 removal tower, a condensation absorption tower, a condensate backflow tank, a secondary condensation heat exchanger and a circulating spraying pump. A gas phase outlet is formed in the top of the M1 removal tower and communicated with the bottom of the condensation absorption tower through a pipeline, a gas phase outlet in the top of the condensation absorption tower is communicated with the secondary condensation heat exchanger through a pipeline, and the bottom of the condensation absorption tower and the secondary gas phase condensation heat exchanger are connected with the condensate backflow tank; the condensate backflow tank is connected with the top of the M1 removal tower and the top of the condensation absorption tower through pipelines respectively by means of the circulating spraying pump, so that a liquid phase is subjected to backflow and spraying in the M1 removal tower and the condensation absorption tower and makes countercurrent contact with a gas phase rising from the bottom. The system can effectively prevent gas phase formaldehyde on the top of the M1 removal tower from being polymerized in the condensation process and prevent a condenser from being blocked, reduces equipment investment, and avoids equipment dredging and overhaul.
Description
Technical field
The invention belongs to chemical production technology and equipment technical field, the process for refining of polymethoxy dimethyl ether is related generally to
Technology.
Background technology
In polymethoxy dimethyl ether DMMn technologies of preparing, after M1 removings, the gas phase of de- M1 column overheads needs condensation, so as to
Complete subsequent technique.Containing free gaseous formaldehyde in the gas phase, gaseous formaldehyde property of dissociating is extremely unstable, can gather immediately to the cold
Merging is attached on the wall of contact.Carried out using shell and tube condenser more than the condensation of the current gas phase, shell and tube condenser
In the technical process easily by gas phase in the gaseous free oxymethylene polymerization that contains block tubulation.The condensation method needs setting 2
Platform (one open one standby), equipment investment is big, and periodically needs switching heat exchanger to carry out dredging maintenance, plant running to another
Not smooth, labor intensive is huge.
The content of the invention
Goal of the invention：For above-mentioned problem and defect, the invention provides de- M1 in a kind of DMMn refining plants
Tower vapor condensation system, can effectively anti-anti-avulsion M1 column overheads gaseous formaldehyde occur in condensation process polymerization so as to block condensation
Device, reduces equipment investment and avoids heat exchanger dredging maintenance.
Technical scheme：For achieving the above object, the present invention uses following technical scheme：In a kind of DMMn refining plants
De- M1 tower vapor condensation systems, including de- M1 towers, condensed absorbent tower, condensate liquid backflash, time condensation heat exchanger, circulated sprinkling
Pump and condensate liquid extraction pump, the tower top of the de- M1 towers are provided with gaseous phase outlet, the gaseous phase outlet of the de- M1 towers by pipeline with
Condensed absorbent tower bottom is connected, and the tower top of the condensed absorbent tower is provided with gaseous phase outlet and by pipeline and time condensation heat exchanger
Connection, the bottom of the condensed absorbent tower and secondary vapor condensation heat exchanger are equipped with liquid-phase outlet and connect with condensate liquid backflash
Connect；The condensate liquid backflash is connected with de- M1 tops of tower and condensed absorbent top of tower pipeline respectively by circulated sprinkling pump, is made
The liquid phase gas phase counter current contacting that backflow is sprayed and risen with bottom in de- M1 towers and condensed absorbent tower in condensate liquid backflash,
The condensate liquid backflash is additionally provided with extraction pipe, and the condensate liquid extraction pump is located on extraction pipe.
When former shell and tube condenser is condensed to the gaseous component for taking off M1 towers, because tubulation tube wall is under the cooling of cold water
Temperature is relatively low, polymerization easily occurs so as to stifled when touching low temperature tube wall into the gaseous component high temperature gas formaldehyde in tubulation
Plug condenser.And the present invention directly uses absorption tower, gas formaldehyde absorb after tower bottom enters with from upper spray and under it is cold
Lime set carries out mass-and heat-transfer absorption, gaseous formaldehyde is become the polymerization that Liquid for maldehyde avoids formaldehyde, while PARA FORMALDEHYDE PRILLS(91,95) plays cold
Solidifying effect removal effect.
Preferably, the condensed absorbent tower is packed absorber, temperature is 55~75 DEG C in tower, so as to can ensure that liquid
Formaldehyde is completely absent polymerization situation in the operating temperature range, so as to completely avoid line clogging.
Preferably, spray equipment is equipped with the top of the de- M1 towers and condensed absorbent tower, so as to efficiently enter promoting the circulation of qi
Liquid contact absorption forms Liquid for maldehyde.
Preferably, the inlet temperature of stabilizer that the condensate liquid enters condensed absorbent tower spray equipment is 45 ± 2 DEG C, the de- M1
The gaseous phase outlet temperature of tower is 72~78 DEG C.
Beneficial effect：Compared with prior art, the condensing mode that the present invention passes through condensed absorbent tower, can be by gaseous formaldehyde
It is effectively converted into Liquid for maldehyde.Liquid for maldehyde polymerization activity well below gaseous formaldehyde, and at normal operating temperatures completely not
In the presence of polymerization situation.By after the absorption of condensed absorbent tower, the gas phase tissue without formaldehyde is condensed by time condensation heat exchanger again
And reclaim.The time condensation heat exchanger is that can reach requirement using common plate type heat exchanger, whole cold so as to be greatly lowered
The investment of solidifying system, and do not need the regular heat exchanging device to carry out dredging maintenance.
Brief description of the drawings
Fig. 1 is the structural representation of de- M1 tower vapor condensation systems in DMMn refining plants of the present invention.
Wherein, M1 towers 1, condensed absorbent tower 2, condensate liquid backflash 3, time condensation heat exchanger 4, circulated sprinkling pump 5, cold are taken off
Lime set produces pump 6.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
The present invention rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are to of the invention each
The modification for planting the equivalent form of value falls within the application appended claims limited range.
As shown in figure 1, M1 tower vapor condensation systems are taken off in a kind of DMMn refining plants of the invention, including de- M1 towers, condensation
Absorption tower, condensate liquid backflash, time condensation heat exchanger, circulated sprinkling pump and condensate liquid extraction pump, the tower top of the de- M1 towers
Gaseous phase outlet is provided with, the gaseous phase outlet of the de- M1 towers is connected by pipeline with condensed absorbent tower bottom, the condensed absorbent tower
It is provided with gaseous phase outlet and is connected with time condensation heat exchanger by pipeline using packed tower, and tower top, the condensed absorbent tower
Bottom and secondary vapor condensation heat exchanger are equipped with liquid-phase outlet and are connected with condensate liquid backflash；The condensate liquid backflash leads to
Cross circulated sprinkling pump to be connected with de- M1 tops of tower and condensed absorbent top of tower pipeline respectively, the liquid phase in condensate liquid backflash is existed
Flow back the gas phase counter current contacting for spraying and rising with bottom in de- M1 towers and condensed absorbent tower, and the condensate liquid backflash is additionally provided with
Extraction pipe, the condensate liquid extraction pump is located on extraction pipe.
The de- tower top of M1 towers 1 contains the gaseous component of formaldehyde, M1, enters from the bottom of condensed absorbent tower 2, and circulated sprinkling pump 5 will
Condensate liquid circulates M1 towers 1, the top of condensed absorbent tower 2 back off and is sprayed in proportion.So containing formaldehyde, the gaseous component of M1 and cold
Lime set carries out reverse mass transfer contact absorption in condensed absorbent tower 2, and condensate liquid by low temperature and higher temperatures are containing formaldehyde, M1
The temperature that the mixing contact of gaseous component reduces gaseous component reaches cooling purpose.Enter condensate liquid by the liquid phase component for absorbing
Backflash 3, gaseous formaldehyde has now been free of by the gaseous component for absorbing, and the gas phase enters two from the top of condensed absorbent tower 2
Secondary condensing heat exchanger 4 is condensed, and condensate liquid enters condensate liquid backflash 3.A material part in condensate liquid backflash 3 passes through
Circulated sprinkling pump 5 is circulated spray, and another part produces the extraction system of pump 6 at next step operation by condensate liquid
Reason.
Claims (4)
1. M1 tower vapor condensation systems are taken off in a kind of DMMn refining plants, it is characterised in that：Including de- M1 towers, condensed absorbent tower,
Condensate liquid backflash, time condensation heat exchanger, circulated sprinkling pump and condensate liquid extraction pump, the tower top of the de- M1 towers are provided with gas phase
Outlet, the gaseous phase outlet of the de- M1 towers is connected by pipeline with condensed absorbent tower bottom, and the tower top of the condensed absorbent tower sets
There is gaseous phase outlet and connected with time condensation heat exchanger by pipeline, the bottom of the condensed absorbent tower and secondary vapor condensation are changed
Hot device is equipped with liquid-phase outlet and is connected with condensate liquid backflash；The condensate liquid backflash by circulated sprinkling pump respectively with it is de-
M1 tops of tower and condensed absorbent top of tower pipeline are connected, and make the liquid phase in condensate liquid backflash in de- M1 towers and condensed absorbent tower
Backflow spray and the gas phase counter current contacting risen with bottom, the condensate liquid backflash are additionally provided with extraction pipe, and the condensate liquid is adopted
Go out pump to be located on extraction pipe.
2. M1 tower vapor condensation systems are taken off in DMMn refining plants according to claim 1, it is characterised in that：The condensation is inhaled
Receipts tower is packed absorber, and temperature is 55~75 DEG C in tower.
3. M1 tower vapor condensation systems are taken off in DMMn refining plants according to claim 1, it is characterised in that：The de- M1 towers
Spray equipment is equipped with the top of condensed absorbent tower.
4. M1 tower vapor condensation systems are taken off in DMMn refining plants according to claim 1, it is characterised in that：The condensate liquid
Inlet temperature of stabilizer into condensed absorbent tower spray equipment is 45 ± 2 DEG C, and the gaseous phase outlet temperature of the de- M1 towers is 72~78 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610680457.0A CN106699521A (en) | 2016-08-17 | 2016-08-17 | M1 removal tower gas phase condensation system in DMMn refining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610680457.0A CN106699521A (en) | 2016-08-17 | 2016-08-17 | M1 removal tower gas phase condensation system in DMMn refining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106699521A true CN106699521A (en) | 2017-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610680457.0A Pending CN106699521A (en) | 2016-08-17 | 2016-08-17 | M1 removal tower gas phase condensation system in DMMn refining device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104725203A (en) * | 2015-03-24 | 2015-06-24 | 江苏凯茂石化科技有限公司 | Process device and method for synthesizing polymethoxyl dimethyl ether and deacidifying by formaldehyde gas |
| CN104817440A (en) * | 2015-05-14 | 2015-08-05 | 江苏凯茂石化科技有限公司 | Process unit and method for absorbing formaldehyde in polymethoxy dimethyl ether synthesis |
| CN105566077A (en) * | 2016-02-03 | 2016-05-11 | 凯瑞环保科技股份有限公司 | Process method for preparing polyoxymethylene dimethyl ethers |
| CN206051889U (en) * | 2016-08-17 | 2017-03-29 | 江苏凯茂石化科技有限公司 | M1 tower vapor condensation systems are taken off in a kind of DMMn refining plants |
-
2016
- 2016-08-17 CN CN201610680457.0A patent/CN106699521A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104725203A (en) * | 2015-03-24 | 2015-06-24 | 江苏凯茂石化科技有限公司 | Process device and method for synthesizing polymethoxyl dimethyl ether and deacidifying by formaldehyde gas |
| CN104817440A (en) * | 2015-05-14 | 2015-08-05 | 江苏凯茂石化科技有限公司 | Process unit and method for absorbing formaldehyde in polymethoxy dimethyl ether synthesis |
| CN105566077A (en) * | 2016-02-03 | 2016-05-11 | 凯瑞环保科技股份有限公司 | Process method for preparing polyoxymethylene dimethyl ethers |
| CN206051889U (en) * | 2016-08-17 | 2017-03-29 | 江苏凯茂石化科技有限公司 | M1 tower vapor condensation systems are taken off in a kind of DMMn refining plants |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190319 Address after: 214000 Xiuxi Road, Binhu District, Wuxi City, Jiangsu Province, 58-50 Applicant after: Wuxi Yimao International Trade Co., Ltd. Address before: 214061 Building 50, Henghua Science Park, 58 Xiuxi Road, Binhu District, Wuxi City, Jiangsu Province Applicant before: Jiangsu Kaimao Chemical Technology Co., Ltd. |
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| SE01 | Entry into force of request for substantive examination |