CN221344317U - DMF waste water recovery device - Google Patents
DMF waste water recovery device Download PDFInfo
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- CN221344317U CN221344317U CN202323423751.8U CN202323423751U CN221344317U CN 221344317 U CN221344317 U CN 221344317U CN 202323423751 U CN202323423751 U CN 202323423751U CN 221344317 U CN221344317 U CN 221344317U
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- rectifying column
- tower
- evaporation
- level
- cauldron
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- 239000002351 wastewater Substances 0.000 title claims abstract description 25
- 238000011084 recovery Methods 0.000 title claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims abstract description 42
- 230000008020 evaporation Effects 0.000 claims abstract description 39
- 230000006837 decompression Effects 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000007701 flash-distillation Methods 0.000 claims description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 123
- 238000002425 crystallisation Methods 0.000 description 14
- 230000008025 crystallization Effects 0.000 description 14
- 239000002649 leather substitute Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 239000013064 chemical raw material Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 150000002576 ketones Chemical class 0.000 description 2
- 231100000053 low toxicity Toxicity 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses a DMF wastewater recovery device which comprises an adjusting tank, a first-stage evaporation kettle, a gas-liquid separator, a rectifying tower, a filter, a first-stage decompression concentration kettle tower, an evaporation separator, a first-stage decompression rectifying tower and a flash evaporation cooling crystallizer.
Description
Technical Field
The utility model relates to the technical field of synthetic leather wastewater recovery, in particular to a DMF wastewater recovery device.
Background
Dimethylformamide (DMF) is used as an important chemical raw material and a solvent with excellent performance, and is mainly applied to various chemical industries. Due to the unique physical properties, most organic matters and various inorganic matters can be dissolved, DMF is a colorless transparent liquid, has strong polarity and low toxicity, can be mixed with water, alcohol, ester, ketone, ether, unsaturated hydrocarbon and aromatic hydrocarbon, is called as a universal solvent, and is widely applied to the fields of synthetic leather and the like, so that a large amount of DMF wastewater can be generated in the production process of a synthetic leather production enterprise, the wastewater has the characteristics of bad smell, strong toxicity, stable property and the like, the emission of DMF wastewater can further cause water quality deterioration, a large amount of DMF is not recycled, and resources are greatly wasted, and therefore, the DMF wastewater recycling device is provided.
Disclosure of utility model
The utility model aims to provide a DMF wastewater recovery device to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model is realized by the following technical means:
The utility model provides a DMF effluent recycling device, includes equalizing basin, one-level evaporation cauldron, vapour and liquid separator, rectifying column, filter, one-level decompression concentration cauldron tower, evaporation separator, one-level decompression rectifying column, flash distillation cooling crystallizer, the equalizing basin is connected with one-level evaporation cauldron, one-level evaporation cauldron's discharge gate is connected with vapour and liquid separator, vapour and liquid separator's top discharge gate is connected with the middle part pan feeding mouth that sets up the rectifying column in one side, the top discharge gate of rectifying column is connected with evaporation separator's pan feeding mouth through first condenser, one-level evaporation cauldron's bottom discharge gate is connected with one-level decompression concentration cauldron tower's feed inlet through the filter, one-level decompression concentration cauldron tower's top discharge gate is connected with evaporation separator's top feed inlet, one-level decompression rectifying column's middle part discharge gate is connected with flash distillation cooling crystallizer, one-level decompression rectifying column's top is connected with the middle part feed inlet of rectifying column through the second condenser, one-level decompression rectifying column's top is connected with rectifying column's middle part feed inlet through the second condenser, one-level decompression rectifying column's top discharge gate is connected with vapour and liquid separator's feed inlet.
Compared with the prior art, the utility model has the following beneficial effects:
According to the utility model, DMF wastewater from synthetic leather production is used as a raw material, DMF products are recovered through the procedures of gas-liquid separation, reduced pressure concentration, reduced pressure distillation, flash evaporation and cooling crystallization, the content of recovered and purified DMF is more than or equal to 99.5%, the operation is simple, the operation is stable and the period is long, the DMF decomposition rate is reduced, the energy-saving effect is achieved through recycling of a heat source, the procedure is simple, the energy consumption of rectification is reduced, and the DMF decomposition rate is reduced through separation, concentration and flash evaporation, and the DMF recovery production efficiency is improved.
Drawings
FIG. 1 is a block diagram of the components of the present utility model;
fig. 2 is a structural diagram of the components of the present utility model.
Detailed Description
The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.
In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Dimethylformamide (DMF) is used as an important chemical raw material and a solvent with excellent performance, and is mainly applied to various chemical industries. Due to the unique physical properties, most organic matters and various inorganic matters can be dissolved, DMF is a colorless transparent liquid, has strong polarity and low toxicity, can be mixed with water, alcohol, ester, ketone, ether, unsaturated hydrocarbon and aromatic hydrocarbon, is called as a universal solvent, and is widely applied to the fields of synthetic leather and the like, so that a large amount of DMF wastewater can be generated in the production process of a synthetic leather production enterprise, the wastewater has the characteristics of bad smell, strong toxicity, stable property and the like, the emission of DMF wastewater can further cause water quality deterioration, a large amount of DMF is not recycled, and resources are greatly wasted, and therefore, the DMF wastewater recycling device is provided.
In this embodiment, a DMF waste water recovery device, including equalizing basin 1, one-level evaporation cauldron 2, vapour and liquid separator 3, rectifying column 4, filter 5, one-level decompression concentration cauldron tower 6, evaporation separator 7, one-level decompression rectifying column 8, flash distillation cooling crystallizer 9, equalizing basin 1 and one-level evaporation cauldron 2 intercommunication, the discharge gate and the vapour and liquid separator 3 of one-level evaporation cauldron 2 are connected, the top discharge gate and the middle part pan feeding mouth that sets up rectifying column 4 in one side of vapour and liquid separator 3 are connected, the top discharge gate of rectifying column 4 is connected with the pan feeding mouth of evaporation separator 7 through first condenser 10, the bottom discharge gate of one-level evaporation cauldron 2 is connected with the feed inlet of one-level decompression concentration cauldron tower 6 through filter 5, the top discharge gate of one-level decompression concentration cauldron tower 6 is connected with the top feed inlet of evaporation separator 7, the discharge gate of evaporation separator 7 is connected with the middle part pan feeding mouth of one-level decompression rectifying column 8, the middle part discharge gate and the top of one-level decompression rectifying column 8 is connected with the middle part feed inlet 9 of rectifying column 8, the top discharge gate and the top of one-level decompression rectifying column 8 is connected with the middle part of two-level decompression rectifying column 4 through the feed inlet 11 of two condenser 11.
In one possible embodiment of the utility model, the MDF content of DMF wastewater in the synthetic leather production is 20-30%, the control range of specific parameters of each component is as follows, the temperature of the gas-liquid separator is controlled to be 70-100 ℃, the temperature in the first-stage reduced pressure concentration kettle tower is 40-50 ℃, the pressure in the tower kettle is 2-15kpa, the pressure in the first-stage reduced pressure rectification tower is 2-15kpa, the temperature in the tower kettle is 140 ℃, the temperature in the tower is 90-110 ℃, the temperature at the top of the tower is 70-80 ℃, the reflux ratio is controlled to be 12:1-4:1, the temperature of cooling medium in flash evaporation cooling crystallization is 0-5 ℃, and the vacuum degree in the flash evaporation cooling crystallization is 65-70kpa.
The flash evaporation cooling crystallizer adopted in the utility model is an OSLO type crystallizer.
In the specific application, the utility model regulates the pH of DMF wastewater in the production of synthetic leather to 7-8 through the regulating tank 1, then sends the DMF wastewater into the first-stage evaporation kettle 2 for evaporation, sends the DMF wastewater into the gas-liquid separator 3 after evaporation, obtains most of crude DMF, and sends the DMF back into the first-stage evaporation kettle 2, the other part of the DMF is purified by rectification in the rectifying tower 4, and separates the liquid DMF through the first condenser 10, the obtained liquid MDF is sent into the evaporation separator 7, the residual DMF wastewater in the first-stage evaporation kettle 2 is sent into the filter 5 for filtration, the impurities are preheated and regulated to be neutral, then sent into the first-stage reduced pressure concentration kettle 6, the concentrated solution after being concentrated by the first-stage reduced pressure concentration kettle 6 is sent into the first-stage reduced pressure rectification kettle 8 after being separated by the evaporation separator 7, and the concentrated solution steam 7 is sent into the first-stage reduced pressure rectification kettle 8, and after being condensed, a part of the DMF is circulated back into the rectifying tower through the top gas phase of the first-stage reduced pressure rectification kettle, the DMF concentrated solution steam is extracted from the middle part of the rectifying tower and crystallized through the flash evaporator 9, and the DMF product is obtained, after being decompressed and concentrated, and the DMF is concentrated through the pressure reduction, and the temperature reduction, the temperature can be reduced by the crystallization heat source, and the energy consumption can be reduced by the crystallization heat source, and the crystallization effect is reduced by the energy saving, and the energy consumption is reduced by the crystallization, and the crystallization heat concentration is reduced by the crystallization process by the temperature by the crystallization process by the energy reduction of the crystallization process of 5, and the temperature reduction of the crystallization process and the temperature is reduced by the temperature reduction of the temperature by the reduction of the crystallization process and the temperature reduction of the temperature and the reduction and the temperature reduction and the concentration.
Specifically, the vacuum degree in the flash evaporation cooling crystallization is 65-70kpa.
Example 1
The utility model discloses a DMF wastewater recovery device, when in use, DMF wastewater with MDF content of 30% in synthetic leather production is processed, the temperature of a gas-liquid separator 3 is controlled at 90 ℃, the temperature in a tower of a first-stage decompression concentration kettle tower 6 is 50 ℃, the pressure in the tower of the first-stage decompression rectifying tower 8 is 2kpa, the temperature in the tower is 140 ℃, the temperature in the tower is 110 ℃, the temperature in the tower top is 80 ℃, the reflux ratio is controlled to 4:1, the temperature of cooling medium in a flash evaporation cooling crystallizer 9 is 0 ℃, the vacuum degree in the flash evaporation cooling crystallizer 9 is 65kpa, the purity of 99.8wt% DMF is obtained, the chromaticity is 7, the density of 20 ℃ is 0.92g/cm 3, and the moisture content is 0.01wt%.
The disclosed embodiments fall within the scope of the appended claims, and are intended to be illustrative of the scope of the utility model as defined by the claims, which should not be construed as limiting the scope of the claims.
The product structure connection relations falling within the protection scope of the utility model fall into the protection content of the utility model; conventional modifications to the structure of the product parts, such as those described in the embodiments of the utility model, would fall within the spirit of the utility model without departing from the spirit of the utility model.
While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments without departing from the scope of the utility model, and accordingly, the various pumps in actual practice, and the corresponding controllers, valves, heaters, etc., are not described in the foregoing description, without affecting the practice of the utility model. Accordingly, the foregoing description is illustrative in nature and is not to be construed as limiting the scope of the utility model as claimed.
Unless defined otherwise, all academic and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
In the case of abutment, the definition in this specification controls.
All percentages, parts, ratios, etc. are by weight unless otherwise specified.
When values or ranges of values, preferred ranges or a list of lower and upper preferred values are provided, it is to be understood that any range formed from any smaller range limit or preferred value and any pair of values for any larger range limit or preferred value, whether or not the ranges are separately disclosed. Where the specification describes a numerical range, unless the specification states otherwise, the range is intended to include both the end of the range and all integers and fractions within the range.
When the terms "about" or "about" are used to describe the end of a numerical value or range, the disclosure should be interpreted to include the particular numerical value or end of the range concerned.
The use of "a" and "an" are used to describe elements of the utility model for convenience and to give a general description of the utility model. Unless explicitly stated otherwise, the description should be understood as including one or at least one.
Claims (2)
1. DMF waste water recovery device, its characterized in that: including equalizing basin (1), one-level evaporation cauldron (2), gas-liquid separator (3), rectifying column (4), filter (5), one-level decompression concentrated cauldron tower (6), evaporation separator (7), one-level decompression rectifying column (8), flash distillation cooling crystallizer (9), equalizing basin (1) and one-level evaporation cauldron (2) intercommunication, the discharge gate and the gas-liquid separator (3) of one-level evaporation cauldron (2) are connected, the top discharge gate and the middle part pan feeding mouth of rectifying column (4) that sets up in one side of gas-liquid separator (3), the top discharge gate of rectifying column (4) is connected with the pan feeding mouth of evaporating separator (7) through first condenser (10), the bottom discharge gate of one-level evaporation cauldron (2) is connected with the feed inlet of one-level decompression concentrated cauldron tower (6) through filter (5), the top discharge gate of one-level decompression concentrated cauldron tower (6) is connected with the top feed inlet of evaporating separator (7), the top discharge gate of evaporating separator (7) is connected with the middle part pan feeding mouth of rectifying column (8) and the middle part of rectifying column (8) through first condenser (8), the top of one-level decompression concentrated cauldron tower (8) is connected with the middle part of rectifying column (8) is connected with the pan feeding mouth of rectifying column (8), the middle discharge port of the rectifying tower (4) is communicated with the feed inlet of the gas-liquid separator (3).
2. A DMF waste water recovery apparatus according to claim 1, wherein: the flash evaporation cooling crystallizer (9) is an OSLO type crystallizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323423751.8U CN221344317U (en) | 2023-12-15 | 2023-12-15 | DMF waste water recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323423751.8U CN221344317U (en) | 2023-12-15 | 2023-12-15 | DMF waste water recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221344317U true CN221344317U (en) | 2024-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323423751.8U Active CN221344317U (en) | 2023-12-15 | 2023-12-15 | DMF waste water recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221344317U (en) |
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2023
- 2023-12-15 CN CN202323423751.8U patent/CN221344317U/en active Active
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