CN208130536U - Metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system - Google Patents
Metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system Download PDFInfo
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- CN208130536U CN208130536U CN201820283726.4U CN201820283726U CN208130536U CN 208130536 U CN208130536 U CN 208130536U CN 201820283726 U CN201820283726 U CN 201820283726U CN 208130536 U CN208130536 U CN 208130536U
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- destilling tower
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses metaformaldehydes to synthesize destilling tower vapour phase low level heat recovery system, recovery system includes condenser, separator, first regulating valve, second regulating valve, flowmeter, the cold boiler being sequentially communicated by pipeline, formaldehyde storage tank, metaformaldehyde synthesis reactor and synthesis destilling tower, synthesis destilling tower top are provided with first pipe and for providing the second pipe of side shell heat source to cold boiler；First pipe is connected to after passing through the first regulating valve with condenser；The bottom of condenser is connected to setting with separator；Cold boiler lower sidewall is provided with condensate liquid outlet；The bottom of separator is connected to synthesis destilling tower side wall upper part.The utility model can low level heat in effective recycling synthesizing triformol steam, reduce heating steam consumption, it is energy saving.Considerable economic benefit is brought to enterprise, more importantly reducing generated thermal pollution in entire process flow, while reducing fuel consumption needed for production technology.
Description
Technical field
The utility model relates to energy saving of chemical industry environment protection fields, and in particular to metaformaldehyde synthesizes destilling tower vapour phase low level heat and returns
Receipts system.
Background technique
Currently, domestic copolymerized methanal production technology mainly has two kinds of Polish ZAT technique and Hong Kong richness skill technique, with foreign countries
Advanced technologies compare, and the energy consumption of Polish ZAT technique and Hong Kong richness skill technique is higher, and therefore, domestic copolymerized methanal is in middle and high end
Competitiveness in market is weaker, and how to reduce copolymerized methanal production energy consumption becomes that domestic copolymerized methanal manufacturer is urgently to be resolved to be asked
Topic.
In metaformaldehyde synthesis process, the calorific value that vapour phase steam contains at the top of synthesis destilling tower is higher, cold
The heat taken away in condenser by cooling water too wastes.For the high level heat being recycled extensively,
These Lowlevel thermal energies are more difficult to get comprehensive recycling.
Utility model content
The purpose of this utility model is to provide metaformaldehydes to synthesize destilling tower vapour phase low level heat recovery system, to solve mesh
The technical problems such as low level recuperation of heat is difficult in preceding metaformaldehyde synthesis process, thermal pollution is high, fuel consumption is big in technical process.
The utility model offer metaformaldehyde synthesis destilling tower vapour phase low level heat recovery system, including condenser, separator,
First regulating valve, the second regulating valve, flowmeter, the cold boiler being sequentially communicated by pipeline, formaldehyde storage tank, metaformaldehyde close
At reactor and synthesis destilling tower, the synthesis distillation tower bottom is connected to metaformaldehyde synthesis reactor, the synthesis distillation
Top of tower is provided with first pipe and for providing the second pipe of side shell heat source to cold boiler, sets on the second pipe
It is equipped with flowmeter and the second regulating valve；The first pipe is connected to after passing through the first regulating valve with condenser；The condenser
Bottom is connected to setting with separator；
It is provided with fixed gas discharge pipe line in the middle part of the cold boiler side wall, cold boiler lower sidewall is provided with cold
Lime set outlet, condensate liquid outlet are connected to condenser；
The bottom of the separator is connected to synthesis destilling tower side wall upper part.
Further, pump is additionally provided in the connecting pipe of the formaldehyde storage tank and metaformaldehyde synthesis reactor.
Further, pump is additionally provided in the connecting pipe of the separator bottom and synthesis destilling tower.
Further, the cold boiler is corrosion resistant metal material；The corrosion resistant metal material be S32507 or
S32205 or 904L or C22 or 304L.
Further, the corrosion-resistant metal materials of cold boiler are with a thickness of 10~14mm.
Further, it is connected at the top of described second pipe one end and synthesis destilling tower, the second pipe other end and vacuum
The connection of evaporator side wall upper part.
The beneficial effects of the utility model are embodied in：
（1）The utility model metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system, being capable of effective recycling conjunction
At the low level heat in metaformaldehyde steam, heating steam consumption is reduced, it is energy saving.
（2）The utility model metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system, improves production metaformaldehyde
Efficiency of energy utilization, create economic value, also reduce mark coal usage amount and CO2 emissions indirectly, be conducive to
Environmental protection.Considerable economic benefit is not only brought to enterprise, more importantly reducing generated heat in entire process flow
Pollution, while reducing fuel consumption needed for production technology.
（3）The process route of device design provided by the utility model, the equipment cost of use is controllable, easy to maintain, work
People is easy to operate, high degree of automation.Formaldehyde cold boiler exports concentrated formaldehyde stability of concentration and recovery system can be real
The operation of existing continuous-stable, the cycle of operation is longer, has extraordinary industrial applications prospect.
Other features and advantages of the utility model will illustrate in the following description, and partly from specification
It becomes apparent, or is understood and implementing the utility model.The main purpose and further advantage of the utility model can lead to
Specifically noted scheme in specification, claims is crossed to be achieved and obtained.
Detailed description of the invention
Fig. 1 is that metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system schematic diagram.
Fig. 2 is cold boiler internal partition structural schematic diagram.
Detailed description of the invention：1-condenser, 2-separators, the 3-the first regulating valve, 4-first pipes, the 5-the second regulating valve,
6-second pipes, 7-formaldehyde storage tanks, 8-metaformaldehyde synthesis reactor, 9-synthesis destilling towers, 10-pumps, 11-flows
Meter, 12-cold boilers, 13-fixed gas discharge pipe lines, 14-condensate liquid outlets.
Specific embodiment
As used in the utility model, term "comprising", " comprising ", " containing ", " having " meaning be non-limiting, i.e.,
The other steps for influencing result and other ingredients can be added not.Terms above cover term " by ... form " and " substantially
By ... form ".Unless otherwise specified, material, equipment, reagent are commercially available.
With reference to Fig. 1, metaformaldehyde synthesis technology side of the utility model mainly for domestic each copolymerized methanal manufacturing enterprise
There are problems that synthesizing steam low level heat waster in method, metaformaldehyde synthesis destilling tower vapour phase low level heat recovery system be provided,
The recovery system includes condenser 1, separator 2, the first regulating valve 3, the second regulating valve 5, flowmeter 11, successively by pipeline
Cold boiler 12, formaldehyde storage tank 7, metaformaldehyde synthesis reactor 8 and the synthesis destilling tower 9 of connection, the synthesis destilling tower 9
Bottom is connected to metaformaldehyde synthesis reactor 8, first pipe 4 is provided at the top of the synthesis destilling tower 9 and for vacuum
Evaporator 12 provides the second pipe 6 of side shell heat source, is provided with flowmeter 11 and the second regulating valve 5 on the second pipe 6；Institute
It states and is connected at the top of 6 one end of second pipe and synthesis destilling tower 9, on 6 other end of second pipe and 12 side wall of cold boiler
Portion's connection.The first pipe 4 is connected to after passing through the first regulating valve 3 with condenser 1；The bottom of the condenser 1 and separator 2
Connection setting.The bottom of the separator 2 is connected to synthesis 9 side wall upper part of destilling tower, and pump 10 is additionally provided in connecting pipe.
The fixed gas discharge pipe line 13 for discharging on-condensible gas is provided in the middle part of 12 side wall of cold boiler, to mention
Heat transfer effect in high vacuum evaporator (HVE) 12.Diaphragm structure is provided with inside cold boiler 12, to reduce shell-side media flow
Resistance；Meanwhile to eliminate flow blind angle, shell-side bottom increases discharge pipe line.
Lower sidewall is additionally provided with condensate liquid outlet 14, and condensate liquid outlet 14 can be connected to condenser 1, referring to figure
Shown in 1.Because of heating source pressure, temperature variation, the heat exchange area of formaldehyde cold boiler 12 needs corresponding change.It is evaporated in vacuo
Device 12 is corrosion resistant metal material；The corrosion resistant metal material be S32507 or S32205 or 904L or C22 or
304L。
Wherein, the corrosion-resistant metal materials of cold boiler 12 are with a thickness of 10~14mm, and exchange heat tube thickness 2mm.
Wherein, pump 10 is additionally provided in the formaldehyde storage tank 7 and the connecting pipe of metaformaldehyde synthesis reactor 8.
The method that metaformaldehyde synthesizes the low level recuperation of heat of destilling tower vapour phase, includes the following steps：
Step 1, by industrial formol（Usual concentration is 40%, wt）It is sent into be synthesized in cold boiler 12 with metaformaldehyde and steam
Vapour heating, it is 60% that concentration is obtained after being concentrated by evaporation under vacuum conditions（wt）Formalin is simultaneously transported to formaldehyde storage tank 7
It is interior, the concentrated formaldehyde aqueous solution in formaldehyde storage tank 7 is sent into metaformaldehyde synthesis reactor 8 by pump 10；Meanwhile fixed gas is arranged
It puts pipeline 13 to continue for on-condensible gas to be discharged, to improve heat transfer rate；The condensate liquid generated in cold boiler 12 is sent by pipeline
Enter and is recycled in condenser 1.
Step 2 in metaformaldehyde synthesis reactor 8, uses sulfuric acid as catalyst under catalytic action, through reboiler plus
Heat obtains metaformaldehyde gaseous mixture to 101 DEG C~106 DEG C；
Step 3, metaformaldehyde gaseous mixture, which enters in synthesis destilling tower 9, carries out initial gross separation, and the vapour phase after separation is steamed
Vapour a part enters cold boiler 12 by second pipe 6, and another part enters condenser 1 by first pipe 4, finally leads to
It crosses recirculated cooling water and enters cooling tower, and then can be discharged into environment；
Step 4, metaformaldehyde, formaldehyde mixed liquor in condenser 1 enter separator 2, carry out secondary separation processing, lead to
It crosses pump 10 and is sent into synthesis destilling tower 9；
Wherein, the gas phase steam in step 3, which enters in cold boiler 12, provides side shell heat source for it.
Examples 1 to 3 is to synthesize destilling tower vapour phase low level heat recovery system according to metaformaldehyde disclosed by the utility model
The experiment of progress：
The polyformaldehyde plant modification example detailed description carried out at home below according to utility model people is originally practical
Novel, the purpose of this utility model and effect will be apparent.
Table 1, Examples 1 to 3 are the performance characterization for synthesizing destilling tower vapour phase low level recuperation of heat transformation
Upper table 1 is parameter after different polyformaldehyde plant modifications, and it is 20,000 tons/year that Examples 1 to 3, which is directed to year output,
Polyformaldehyde device is transformed.
As can be seen from the table, partition is installed additional in cold boiler 12（Shown in Fig. 2）, disengagement area is kept at 135
m2More than.Improved cold boiler, steam consumption is 0 per hour, is because cold boiler does not use after transformation
The heating of 0.1MPa steam, and the low level heat heating of recycling is fully utilized.No longer need the cold boiler of external heat source completely according to
Rely the low level thermal technology of recycling to make, substantially reduce energy consumption, reduces production cost.
By the way that first pipe 4 and second pipe 6 is arranged at the top of synthesis destilling tower 9 and assembles flow sensor and tune simultaneously
Valve is saved, realizes the regulation of series of total system, the flow and pressure for further ensuring total system are stablized.The utility model pair
Traditional cold boiler 12 improves, and joined the diaphragm structure for reducing shell-side media flow resistance（Institute referring to fig. 2
Show）, disengagement area is more than doubled；It is additionally arranged the fixed gas discharge pipe line 13 for improving heat transfer effect；Corrosion resistant is used
Lose metal material；Cold boiler 12 is enabled preferably to adapt to heat source pressure, temperature change and heat exchange area.
Destilling tower vapour phase low level heat recovery system, improved system are synthesized using metaformaldehyde provided by the utility model
System can effectively recycle 9 vapour phase low level heat of synthesis destilling tower and its part is used for formaldehyde cold boiler 12 as shell-side
Heat source；Metaformaldehyde synthesis reactor is only remained in system to heat using external steam, and production cost is effectively reduced, improves production
The efficiency of energy utilization of metaformaldehyde creates more economic values, also reduces mark coal usage amount and carbon dioxide indirectly
Discharge amount, more importantly reducing generated thermal pollution in entire process flow.Equipment cost is controllable, easy to maintain,
Worker operation is convenient, high degree of automation.It is able to achieve the operation of continuous-stable, there is extraordinary industrial applications prospect.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical new to this
The range of type is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this reality
The various changes and improvements made with novel technical solution should all fall into the protection model that the utility model claims book determines
In enclosing.
Claims (6)
1. metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system, which is characterized in that including condenser（1）, separator
（2）, the first regulating valve（3）, the second regulating valve（5）, flowmeter（11）, the cold boiler that is sequentially communicated by pipeline（12）,
Formaldehyde storage tank（7）, metaformaldehyde synthesis reactor（8）With synthesis destilling tower（9）；
The synthesis destilling tower（9）Bottom and metaformaldehyde synthesis reactor（8）Connection, the synthesis destilling tower（9）Top is set
It is equipped with first pipe（4）With for cold boiler（12）The second pipe of side shell heat source is provided（6）, the second pipe
（6）On be provided with flowmeter（11）With the second regulating valve（5）；The first pipe（4）Across the first regulating valve（3）Afterwards with condensation
Device（1）Connection；The condenser（1）Bottom and separator（2）Connection setting；
The cold boiler（12）Fixed gas discharge pipe line is provided in the middle part of side wall（13）, cold boiler（12）Lower sidewall
It is provided with condensate liquid outlet（14）, condensate liquid outlet（14）With condenser（1）Connection；
The separator（2）Bottom and synthesis destilling tower（9）Side wall upper part connection.
2. metaformaldehyde as described in claim 1 synthesizes destilling tower vapour phase low level heat recovery system, which is characterized in that the first
Aldehyde storage tank（7）With metaformaldehyde synthesis reactor（8）Connecting pipe on be additionally provided with pump（10）.
3. metaformaldehyde as described in claim 1 synthesizes destilling tower vapour phase low level heat recovery system, which is characterized in that described point
From device（2）Bottom and synthesis destilling tower（9）Connecting pipe on be additionally provided with pump（10）.
4. metaformaldehyde as described in claim 1 synthesizes destilling tower vapour phase low level heat recovery system, which is characterized in that described true
Empty evaporator（12）For corrosion resistant metal material；Corrosion resistant metal material is S32507 or S32205 or 904L or C22
Or 304L.
5. metaformaldehyde as claimed in claim 4 synthesizes destilling tower vapour phase low level heat recovery system, which is characterized in that vacuum is steamed
Send out device（12）Corrosion-resistant metal materials with a thickness of 10~14mm.
6. metaformaldehyde as described in claim 1 synthesizes destilling tower vapour phase low level heat recovery system, which is characterized in that described the
Two pipelines（6）One end and synthesis destilling tower（9）Top connection, the second pipe（6）The other end and cold boiler（12）Side
The connection of wall top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820283726.4U CN208130536U (en) | 2018-02-28 | 2018-02-28 | Metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820283726.4U CN208130536U (en) | 2018-02-28 | 2018-02-28 | Metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system |
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| CN208130536U true CN208130536U (en) | 2018-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273282A (en) * | 2018-02-28 | 2018-07-13 | 重庆云天化天聚新材料有限公司 | Metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system and its recovery method |
-
2018
- 2018-02-28 CN CN201820283726.4U patent/CN208130536U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273282A (en) * | 2018-02-28 | 2018-07-13 | 重庆云天化天聚新材料有限公司 | Metaformaldehyde synthesizes destilling tower vapour phase low level heat recovery system and its recovery method |
| CN108273282B (en) * | 2018-02-28 | 2023-11-10 | 重庆云天化天聚新材料有限公司 | Vapor phase low-order heat recovery system of trioxymethylene synthetic distillation tower and recovery method thereof |
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