CN104174259A - Coupling device for methanol evaporation and formaldehyde absorption - Google Patents
Coupling device for methanol evaporation and formaldehyde absorption Download PDFInfo
- Publication number
- CN104174259A CN104174259A CN201410426238.0A CN201410426238A CN104174259A CN 104174259 A CN104174259 A CN 104174259A CN 201410426238 A CN201410426238 A CN 201410426238A CN 104174259 A CN104174259 A CN 104174259A
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- China
- Prior art keywords
- formaldehyde
- methyl alcohol
- methanol
- evaporation
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 231
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 212
- 238000001704 evaporation Methods 0.000 title claims abstract description 44
- 230000008020 evaporation Effects 0.000 title claims abstract description 41
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 40
- 238000010168 coupling process Methods 0.000 title claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 14
- 230000008878 coupling Effects 0.000 title claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 15
- 238000009826 distribution Methods 0.000 claims abstract description 12
- 238000005192 partition Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a coupling device for methanol evaporation and formaldehyde absorption. The coupling device comprises a tower body; the tower body is divided into a methanol evaporation side and a formaldehyde absorption side independent from each other through a division wall; a methanol outlet and an air distribution pipe are arranged at the bottom of the methanol evaporation side; a heat transfer filler is arranged in the middle of the methanol evaporation side; a methanol sprayer is arranged at the upper part of the methanol evaporation side and connected with the methanol outlet through a conveying pump, so that circulation is formed; a methanol mixed gas outlet is also arranged on the top of the methanol evaporation side; a formaldehyde outlet and an air distribution pipe are arranged at the bottom of the formaldehyde absorption side; a filler is also arranged in the middle of the formaldehyde absorption side; a formaldehyde sprayer is arranged at the upper part of the formaldehyde absorption side and connected with the formaldehyde outlet through a conveying pump, so that circulation is formed; a formaldehyde mixed gas outlet is also arranged on the top of the formaldehyde evaporation side; and a heat transfer component passing through the two sides is arranged between the heat transfer fillers in a hybrid manner. According to the invention, the electricity consumption is reduced; formaldehyde absorption and methanol evaporation are integrated, therefore, the occupation area is saved; and the cost is reduced.
Description
Technical field
The invention belongs to Chemical Manufacture Processes and apparatus technical field, relate generally to the silver-colored Division A League Matches of French Football aldehyde Technical facilities in production of preparation.
Background technology
At present, silver-colored method Formaldehyde Production is mainly divided into following unit operations, methyl alcohol evaporation element, oxidation reaction unit, formaldehyde absorption unit, tail gas treating unit.
The place of mainly expending steam in silver method Formaldehyde Production is the evaporation of methyl alcohol, current domestic methyl alcohol evaporation mainly contains two kinds of modes: the first is film-rising evaporator, owing to being pure methyl alcohol evaporation, control evaporating pressure is 5 ~ 15Kpa, 65 ~ 70 ℃ of evaporating temperatures, directly utilize steam as the thermal source of methyl alcohol evaporation, steam power consumption is larger comparatively speaking for this evaporation mode, is domesticly substantially eliminated.Only there are at present some old factories still continuing to use this evaporation mode, the second is for adopting air bubbling evaporation in methanol solution to take away the mode of methyl alcohol, its heat exchange mode mainly contains two kinds: the first for arranging central circulation heater in methanol evaporator, methyl alcohol is walked tube side in evaporimeter, shell side adopts hot formaldehyde heating, and because heat exchanger is built in evaporimeter, equipment size is relatively large, equipment investment expense is larger, the second is that heater is not set in methanol evaporator, methyl alcohol enters methanol evaporator flash of steam enter the abundant heat exchange of material of the plate type heat exchanger of outer setting and the circulation of formaldehyde absorbing tower by methanol loop pump after, due to being set, outer loop heat exchange increases by two outer loop pumps, and internal circulating load is larger, power load is larger.
In silver method Formaldehyde Production, mainly need to consume public work medium circulation water-cooled is formaldehyde absorption unit.Formaldehyde absorption is exothermic process, and thermal discharge is relatively large, thus formaldehyde generally need to be by shifting out heat with cooling medium so that the absorption of formaldehyde.Formaldehyde absorption is generally divided into two towers and absorbs, and at the bottom of the first absorption tower, operating temperature is generally 60 ~ 80 ℃, and tower reactor temperature is generally 40 ~ 60 ℃.The bottom of formaldehyde absorbing tower is general, and technique, in order effectively to save energy, adopts and utilizes methanol evaporator to take away the heat of a part of formaldehyde absorbing tower now, and that is then left takes away unnecessary heat by recirculated water.A set of 60,000 ton of 37% formaldehyde plant, the heat that the first formaldehyde absorbing tower need to shift out is 2000 ~ 4000KW left and right, the heat that methanol evaporator needs is 500 ~ 1500KW left and right.So because heat transfer process formaldehyde absorbing tower circulated material quantity is larger, to the power consumption of this formaldehyde absorption unit circulation, be very large, and if methyl alcohol evaporation adopts the mode of outer loop heat exchange again, methanol loop pump with electric consumption, be also very large.
Summary of the invention
The defect and the problem that in order to overcome prior art, exist, the invention provides a kind of coupling device of methyl alcohol evaporation-formaldehyde absorption, the present invention utilizes the heat that formaldehyde absorbing tower need to shift out to carry out methyl alcohol evaporation, and this invention utilizes Novel hot coupling technique, fully effectively reduce the internal circulating load of formaldehyde absorbing tower internal circulating load and methanol evaporator, thereby greatly reduce with electric consumption, and the present invention is made of one equipment by formaldehyde absorption and formaldehyde evaporation, greatly saved floor space, and equipment cost declines greatly.
Technical scheme: for achieving the above object, the present invention is by the following technical solutions: a kind of coupling device of methyl alcohol evaporation-formaldehyde absorption, comprise tower body, this tower body is divided into two independently methyl alcohol evaporation side and formaldehyde absorption sides by partition wall, the bottom of described methyl alcohol evaporation side is provided with methyl alcohol outlet and air distribution pipe, middle part is provided with heat-transfer filler, top is provided with methyl alcohol shower nozzle and is connected to form circulation by delivery pump and methyl alcohol outlet, and the top of described methyl alcohol evaporation side is also provided with methyl alcohol mixed gas outlet; The bottom of described formaldehyde absorption side is provided with formaldehyde outlet and air distribution pipe, and middle part is provided with filler equally, and top is provided with formaldehyde shower nozzle and is connected to form circulation by delivery pump and formaldehyde outlet, and the top of described formaldehyde evaporation side is also provided with formaldehyde mixed gas outlet; Described methyl alcohol evaporation side is corresponding with the setting position of the heat-transfer filler of formaldehyde absorption side, and between heat-transfer filler, mixes and be provided with the heat transfer element that runs through both sides.
Described heat transfer element is rib heat exchanging pipe.
Described rib heat exchanging pipe circulation has heat transfer medium and is slant setting, and lower one end is located at formaldehyde absorption side, and higher one end is located at methyl alcohol evaporation side.
Described air distribution pipe is calandria distributor.
Beneficial effect: compared with prior art, the present invention directly by two equipment by thermal coupling technology directly by two equipment as a cover system, the heat of carrying out strong motive force by the hot conduction of partition wall and heat radiation and heat pipe in system in internal system is transmitted, thereby reaches the effect of thermal coupling.The one-tenth that the present invention has fully reduced heat transmission equipment produces cost, and the internal circulating load of two cover systems pump separately, thereby effectively reduces power load.Because two equipment direct-couplings become an equipment, the equipment that therefore also effectively reduces takes up an area.
Accompanying drawing explanation
Fig. 1 is the structural representation of methyl alcohol vaporising device of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
As shown in Figure 1, a kind of methyl alcohol evaporation-formaldehyde absorption coupling device, this product mainly comprises two unit, be that methyl alcohol evaporation and two equipment of formaldehyde absorption are included in a device, then mainly utilize partition wall that the material of methyl alcohol evaporation side and formaldehyde absorption side the inside is completely independently divided, be the process that material mass transfer can not be carried out in both sides, can only carry out hot conduction or direct heat radiation is conducted heat by partition wall and heat transfer element.Separately as system independently, in methyl alcohol evaporation element, air enters divide equally distribution in air distribution pipe after, in methyl alcohol evaporation side, methyl alcohol is set up after certain liquid level, from methyl alcohol outlet, utilize methanol loop delivery pump, be promoted to methyl alcohol shower nozzle and sprayed by shower nozzle, methyl alcohol shower nozzle is mainly high efficiency methanol atomizer, its object is mainly that methyl alcohol can be distributed and wetting filler or column plate uniformly, meanwhile air flows from bottom to top, and be sprayed at and on filler or column plate, contact and then form efficient mass transfer and diabatic process with the top-down methanol liquid of methyl alcohol shower nozzle, finally by gas vent, enter next process.
Same, in formaldehyde absorption side, reaction gas enters divide equally distribution in gas distribution tube after, after setting up certain liquid level, from formaldehyde outlet, utilize formaldehyde circulating pump, be promoted to formaldehyde shower nozzle and have the ejection of formaldehyde shower nozzle, formaldehyde shower nozzle master is mainly efficient formaldehyde atomizer, its object is mainly that formaldehyde can distribute and wetting filler or column plate uniformly, formolite reaction gas flows from bottom to top, and contact and in filler or column plate, carry out efficient mass transfer and heat transfer with the top-down formaldehyde liquid of formaldehyde shower nozzle, after by gas vent, enter next process.For the heat exchange of strengthening between methyl alcohol evaporation and formaldehyde absorption can exchange to strengthen the heat transfer of both sides by heat pipe in two covering devices, thereby improve the motive force of methyl alcohol evaporation rate and formaldehyde absorption.
This product can be done squarely or circular configuration according to actual conditions, the methyl alcohol evaporation of both sides and the equipment of formaldehyde absorption and the routine configuration that part is conventional methyl alcohol evaporating column and absorption tower, owing to mainly considering the heat conduction of two cover systems, can consider to adopt high-performance heat transfer components-heat pipe, in the tilted placement of device, formaldehyde absorption unit is that low side is as the evaporator section of heating heat pipe, hydraulic fluid in tube core is subject to thermal evaporation, and take away heat, this heat is the evaporation latent heat of hydraulic fluid, steam flows to the condensation segment of heat pipe from central passage, the condensation segment of hydraulic fluid is high-end, because methyl alcohol evaporator strip is walked heat, therefore condense into liquid in heat pipe, emit latent heat simultaneously, under the effect of capillary force, liquid backflow is to evaporator section.Like this, just completed a closed circulation, thereby a large amount of heats has been passed to radiating segment from bringing-up section.Thereby completed the heat transmission of formaldehyde absorption to methyl alcohol evaporation two ends.
Claims (4)
1. the coupling device of a methyl alcohol evaporation-formaldehyde absorption, it is characterized in that: comprise tower body, this tower body is divided into two independently methyl alcohol evaporation side and formaldehyde absorption sides by partition wall, the bottom of described methyl alcohol evaporation side is provided with methyl alcohol outlet and air distribution pipe, middle part is provided with heat-transfer filler, top is provided with methyl alcohol shower nozzle and is connected to form circulation by delivery pump and methyl alcohol outlet, and the top of described methyl alcohol evaporation side is also provided with methyl alcohol mixed gas outlet; The bottom of described formaldehyde absorption side is provided with formaldehyde outlet and air distribution pipe, and middle part is provided with filler equally, and top is provided with formaldehyde shower nozzle and is connected to form circulation by delivery pump and formaldehyde outlet, and the top of described formaldehyde evaporation side is also provided with formaldehyde mixed gas outlet; Described methyl alcohol evaporation side is corresponding with the setting position of the heat-transfer filler of formaldehyde absorption side, and between heat-transfer filler, mixes and be provided with the heat transfer element that runs through both sides.
2. the coupling device of methyl alcohol evaporation-formaldehyde absorption according to claim 1, is characterized in that: described heat transfer element is rib heat exchanging pipe.
3. the coupling device of methyl alcohol evaporation-formaldehyde absorption according to claim 2, is characterized in that: described rib heat exchanging pipe circulation has heat transfer medium and is slant setting, and lower one end is located at formaldehyde absorption side, and higher one end is located at methyl alcohol evaporation side.
4. according to the coupling device of methyl alcohol evaporation-formaldehyde absorption described in right 3, it is characterized in that: described air distribution pipe is calandria distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410426238.0A CN104174259B (en) | 2014-08-27 | 2014-08-27 | A kind of coupling device of methyl alcohol evaporation-formaldehyde absorption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410426238.0A CN104174259B (en) | 2014-08-27 | 2014-08-27 | A kind of coupling device of methyl alcohol evaporation-formaldehyde absorption |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104174259A true CN104174259A (en) | 2014-12-03 |
| CN104174259B CN104174259B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410426238.0A Active CN104174259B (en) | 2014-08-27 | 2014-08-27 | A kind of coupling device of methyl alcohol evaporation-formaldehyde absorption |
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| Country | Link |
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| CN (1) | CN104174259B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114832407A (en) * | 2022-04-29 | 2022-08-02 | 江苏理文化工有限公司 | Process for efficiently evaporating methanol by utilizing reaction heat |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2116523U (en) * | 1992-02-24 | 1992-09-23 | 华南理工大学 | Absorption condensation tower for manufacturing formaldehyde |
| CN102320942A (en) * | 2011-06-14 | 2012-01-18 | 田宝峰 | Production process and device of formaldehyde |
| CN102584549A (en) * | 2011-12-31 | 2012-07-18 | 田宝峰 | Process and evaporator for preparing raw material gas in methanal production |
| CN204275767U (en) * | 2014-08-27 | 2015-04-22 | 江苏凯茂石化科技有限公司 | A kind of coupling device of methyl alcohol evaporation-formaldehyde absorption |
-
2014
- 2014-08-27 CN CN201410426238.0A patent/CN104174259B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2116523U (en) * | 1992-02-24 | 1992-09-23 | 华南理工大学 | Absorption condensation tower for manufacturing formaldehyde |
| CN102320942A (en) * | 2011-06-14 | 2012-01-18 | 田宝峰 | Production process and device of formaldehyde |
| CN102584549A (en) * | 2011-12-31 | 2012-07-18 | 田宝峰 | Process and evaporator for preparing raw material gas in methanal production |
| CN204275767U (en) * | 2014-08-27 | 2015-04-22 | 江苏凯茂石化科技有限公司 | A kind of coupling device of methyl alcohol evaporation-formaldehyde absorption |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114832407A (en) * | 2022-04-29 | 2022-08-02 | 江苏理文化工有限公司 | Process for efficiently evaporating methanol by utilizing reaction heat |
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| Publication number | Publication date |
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| CN104174259B (en) | 2016-03-23 |
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Denomination of invention: Coupling device for methanol evaporation and formaldehyde absorption Effective date of registration: 20170622 Granted publication date: 20160323 Pledgee: Jiangsu Wujin credit Company limited by guarantee Pledgor: Jiangsu Kaimao Chemical Technology Co., Ltd. Registration number: 2017990000474 |
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