CN220546936U - Device system for continuously producing acrolein and recycling acrylic acid - Google Patents
Device system for continuously producing acrolein and recycling acrylic acid Download PDFInfo
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- CN220546936U CN220546936U CN202321906178.3U CN202321906178U CN220546936U CN 220546936 U CN220546936 U CN 220546936U CN 202321906178 U CN202321906178 U CN 202321906178U CN 220546936 U CN220546936 U CN 220546936U
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- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical compound C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 title claims abstract description 206
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 title claims abstract description 43
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000004064 recycling Methods 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims abstract description 86
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 20
- 238000005406 washing Methods 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 claims abstract description 18
- 238000000605 extraction Methods 0.000 claims abstract description 17
- 238000007670 refining Methods 0.000 claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 17
- 239000002904 solvent Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000010992 reflux Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000010924 continuous production Methods 0.000 claims description 3
- 239000011344 liquid material Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 43
- 239000000047 product Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 9
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 9
- 239000006227 byproduct Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 150000001299 aldehydes Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- KNNPTLFTAWALOI-UHFFFAOYSA-N acetaldehyde;formaldehyde Chemical compound O=C.CC=O KNNPTLFTAWALOI-UHFFFAOYSA-N 0.000 description 1
- 238000005882 aldol condensation reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a device system for continuously producing acrolein and recovering acrylic acid, which comprises: the product outlet of the acrolein reaction device is connected with the acid washing tower; the gas outlet of the acid washing tower is connected with an acrolein absorption tower, and the gas outlet of the acrolein absorption tower is connected with a tail gas purifying device; the air outlet of the tail gas purifying device is connected with the acrolein reaction device; the discharge port of the acrolein absorption tower is connected with the acrolein refining tower; the bottom discharge port of the acrolein refining tower is connected with an acrolein absorption tower, and the top discharge port of the acrolein refining tower is connected with an acrolein product storage tank; the bottom discharge port of the acid washing tower is connected with an acrolein removal tower, and the bottom discharge port of the acrolein removal tower is connected with an extraction tower; the top gas outlet of the extraction tower is connected with the liquid inlet of the solvent recovery tower; the top discharge port of the solvent recovery tower is connected with the extractant inlet at the lower part of the extraction tower, and the bottom discharge port is connected with the heavy-removal tower; the top discharge port of the heavy-duty removal tower is connected with an acrylic acid product storage tank.
Description
Technical Field
The utility model belongs to the technical field of acrolein production, and particularly relates to a device system for continuously producing acrolein and recycling acrylic acid.
Background
Acrolein is the simplest unsaturated aldehyde of formula C 3 H 4 O, which is a colorless transparent malodorous liquid in general, has strong irritation and tear resistance. Acrolein is an important organic chemical raw material and a synthetic intermediate,widely used in resin production and organic synthesis.
The synthesis method of acrolein mainly comprises a propylene oxidation method, a formaldehyde-acetaldehyde gas-phase condensation method, a propylene catalytic oxidation method, a glycerol dehydration method, an aldol condensation method, a propylene ether pyrolysis method, an allyl alcohol oxidation method and the like. The propylene oxidation method is the most main method applied in the current industrial production, the reaction principle is that propylene, air and water vapor are mixed and preheated according to a certain proportion, then propylene is oxidized by air at 290-380 ℃ and normal pressure to generate acrolein, and the reaction equation is as follows:
the reaction products of the catalyst comprise, besides acrolein, by-products of acrylic acid, acetic acid, acetaldehyde, formaldehyde, carbon monoxide, carbon dioxide, a small amount of propylene, polymers and the like; the reacted synthesis gas contains about 10% acrolein, and the other gases are oxygen, nitrogen, water vapor and the byproducts.
In addition to acrolein, other gases must be effectively removed, particularly acrylic acid and acetic acid. The synthesis gas from the reactor is cooled and quenched by a large amount of water, acid byproducts such as acrylic acid, acetic acid and the like are removed in an acid washing tower, and acrylic acid wastewater is discharged from the bottom of the acid washing tower. The gas at the top of the acid washing tower is sent to an absorption tower to absorb acrolein, and the uncondensed gas discharged from the top of the absorption tower is sent to a tail gas treatment device.
A large amount of acrylic acid wastewater can be generated in the acrolein production process, the wastewater is generally subjected to biochemical treatment, incineration or alkali neutralization in the prior art, and the environmental protection cost is high. In addition, the acrylic acid wastewater contains about 10wt% of acrylic acid, and the acrylic acid in the wastewater is not effectively recovered in the prior art, so that the economical efficiency is low, and the material utilization rate is low.
Patent document CN105461532a discloses a production method for producing acrolein and acrylic acid by oxidation of propylene, wherein acrylic acid wastewater produced after purification of acrolein is sent to an acrylic acid absorption tower in an acrylic acid production apparatus to absorb acrylic acid as an absorbent. The method recycles the acrylic acid wastewater, but needs to be used together with an acrylic acid production device, and is not suitable for an independent acrolein production device.
Disclosure of Invention
The utility model aims to provide a device system for continuously producing acrolein and recycling acrylic acid, which solves the problems of high environmental protection cost, low economic benefit, low material utilization rate and the like in the prior art of directly treating acrylic acid wastewater.
In order to achieve the above object, the present utility model has the following technical scheme.
The utility model relates to a device system for continuously producing acrolein and recovering acrylic acid, which is characterized by comprising: the acrolein reaction device is used for reacting propylene with air to prepare synthetic gas containing acrolein; the product outlet of the acrolein reaction device is connected with a gas phase feed inlet of the acid washing tower;
the upper part of the acid washing tower is provided with a deionized water inlet, and a gas outlet at the top of the tower is connected with a gas inlet of the acrolein absorption tower; the upper part of the acrolein absorption tower is provided with a deionized water inlet, and the tower top is provided with a gas outlet connected with a gas inlet of the tail gas purifying device; the gas outlet of the tail gas purifying device is connected with a gas phase feed inlet of the acrolein reaction device; a discharge port at the bottom of the acrolein absorption tower is connected with a liquid inlet of the acrolein refining tower through a rich liquid pipe; the acrolein refining tower is a rectifying tower, a bottom discharge port is connected with a reflux liquid inlet at the upper part of the acrolein absorption tower through a reflux lean liquid pipe, and a top discharge port is connected with an acrolein product storage tank;
the bottom discharge port of the acid washing tower is connected with the feed port of the acrolein removal tower; the acrolein removal tower is a rectifying tower, a top discharge port is connected with an acrolein product storage tank, and a bottom discharge port is connected with a feed inlet of the extraction tower; the lower part of the extraction tower is provided with an extractant inlet, the bottom of the extraction tower is provided with a waste liquid discharge port, and the tower top air outlet is connected with a liquid material inlet of the solvent recovery tower; the solvent recovery tower is a rectifying tower, a top discharge port is connected with an extractant inlet at the lower part of the extraction tower, and a bottom discharge port is connected with a liquid inlet of the weight removing tower; the heavy-removal tower is a rectifying tower, a discharge port at the top of the rectifying tower is connected with an acrylic acid product storage tank, and a waste liquid discharge port at the bottom of the rectifying tower.
Compared with the prior art, the utility model has the following beneficial effects: (1) Can simultaneously realize the production of acrolein and the recovery of acrylic acid, and the purities of the acrolein and the acrylic acid reach the requirements of refined products; (2) Acrylic acid in the byproduct wastewater of the acrolein can be effectively recovered to obtain an acrylic acid product with the weight percent of more than 99 percent, materials in the process are recycled for multiple times, and the utilization rate of raw materials is improved; (3) The tail gas can meet the emission standard, the three wastes are less in emission, and the recovered byproduct acrylic acid can be sold as a product, so that the economic benefit of the production process is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
in the figure: 1-acrolein reaction device, 2-acid washing tower, 3-acrolein absorption tower, 4-acrolein refining tower, 5-acrolein removal tower, 6-extraction tower, 7-solvent recovery tower, 8-weightremoval tower, 9-first gas cooler, 10-lean/rich liquid heat exchanger, 11-absorption liquid cooler, 12-tail gas purification device, 13-first reboiler, 14-second gas cooler, 15-first gas-liquid separator, 16-first vacuum pump, 17-second reboiler, 18-third gas cooler, 19-second gas-liquid separator, 20-second vacuum pump, 21-third reboiler, 22-fourth gas cooler, 23-third gas-liquid separator, 24-third vacuum pump, 25-fourth reboiler, 26-fifth gas cooler, 27-fourth gas-liquid separator, 28-fourth vacuum pump, L1-rich liquid pipe, L2-reflux lean liquid pipe.
Detailed Description
The utility model will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it is understood that various changes and modifications of the present utility model may be made by those skilled in the art after reading the contents of the present utility model, and such equivalents are also within the scope defined in the claims appended hereto.
An apparatus system for continuous production of acrolein and recovery of acrylic acid, comprising:
the acrolein reaction device 1 is used for reacting propylene with air to prepare synthetic gas containing acrolein; the product outlet of the acrolein reaction device 1 is connected with a gas phase feed inlet of the acid washing tower 2;
the upper part of the acid washing tower 2 is provided with a deionized water inlet, and a gas outlet at the top of the tower is connected with a gas inlet of the acrolein absorption tower 3; the upper part of the acrolein absorption tower 3 is provided with a deionized water inlet, and the tower top is provided with a gas outlet connected with a gas inlet of the tail gas purifying device 12; the gas outlet of the tail gas purifying device 12 is connected with a gas phase feed inlet of the acrolein reaction device 1; a discharge port at the bottom of the acrolein absorption tower 3 is connected with a liquid inlet of the acrolein refining tower 4 through a rich liquid pipe L1; the acrolein refining tower 4 is a rectifying tower, a bottom discharge port is connected with a reflux liquid inlet at the upper part of the acrolein absorption tower 3 through a reflux lean liquid pipe L2, and a top discharge port is connected with an acrolein product storage tank;
the bottom discharge port of the acid washing tower 2 is connected with the feed port of the acrolein removal tower 5; the de-acrolein column 5 is a rectifying column, a discharge port at the top of the column is connected with an acrolein product storage tank, and a discharge port at the bottom of the column is connected with a feed port of the extraction column 6; the lower part of the extraction tower 6 is provided with an extractant inlet, the bottom is provided with a waste liquid discharge port, and the tower top air outlet is connected with a liquid material inlet of the solvent recovery tower 7; the solvent recovery tower 7 is a rectifying tower, a top discharge port is connected with an extractant inlet at the lower part of the extraction tower 6, and a bottom discharge port is connected with a liquid inlet of the weightlessness tower 8; the weight removing tower 8 is a rectifying tower, a discharge port at the top of the rectifying tower is connected with an acrylic acid product storage tank, and a waste liquid discharge port at the bottom of the rectifying tower.
Further, the tail gas purifying device 12 is a catalytic oxidation device and is used for treating non-condensable gas at the top of the acrolein absorption tower; the pipeline that the acid washing tower 2 is connected with the acrolein absorption tower 3 is also provided with a first gas cooler 9 for cooling the acrolein gas stream discharged from the acid washing tower 2 to the temperature required by the acrolein absorption tower 3.
Further, a lean liquid/rich liquid heat exchanger 10 is arranged at the junction of the rich liquid pipe L1 and the backflow lean liquid pipe L2, the aldehyde-containing aqueous solution coming out of the acrolein absorption tower 3 exchanges heat with the backflow lean liquid coming out of the acrolein refining tower, the aldehyde-containing aqueous solution is heated, and meanwhile, the backflow lean liquid is cooled; and an absorption liquid cooler is further arranged on the backflow lean liquid pipe L2 and used for further cooling the backflow lean liquid from the acrolein refining tower 4.
Further, a first reboiler 13 is arranged at the bottom of the acrolein refining tower 4, and a second gas cooler 14 and a first gas-liquid separator 15 are sequentially connected to the top outlet of the tower; the exhaust port of the first gas-liquid separator 15 is connected with a vacuum pump to vacuumize the acrolein refining tower 4 to form negative pressure; the liquid outlet of the first gas-liquid separator 15 is divided into two paths, one path is connected with the reflux liquid inlet at the upper part of the acrolein refining tower 4, and the other path is a discharge port and connected with an acrolein product storage tank.
Further, a second reboiler 17 is arranged at the bottom of the acrolein removal tower 5, and a third gas cooler 18 and a second gas-liquid separator 19 are sequentially connected to the top outlet of the tower; the exhaust port of the second gas-liquid separator 19 is connected with a vacuum pump to vacuumize the acrolein removal tower 5 to form negative pressure; the liquid outlet of the second gas-liquid separator 19 is divided into two paths, one path is connected with the reflux liquid inlet at the upper part of the acrolein removal tower 5, and the other path is a discharge port and connected with an acrolein product storage tank.
Further, a third reboiler 21 is arranged at the bottom of the solvent recovery tower 7, and an outlet of the tower top is sequentially connected with a fourth gas cooler 22 and a third gas-liquid separator 23, and is used for cooling the gas flow containing the extractant and circulating to an extractant inlet below the extraction tower for use; the exhaust port of the third gas-liquid separator 23 is connected with a third vacuum pump 24 to vacuumize the solvent recovery tower 7 to form negative pressure; the liquid outlet of the third gas-liquid separator 23 is divided into two paths, one path is connected with the reflux liquid inlet of the solvent recovery tower 7, and the other path is a discharge port and connected with the extractant inlet at the lower part of the extraction tower 6.
Further, a fourth reboiler 25 is arranged at the bottom of the de-weight tower 8, and the top outlet of the tower is sequentially connected with a fifth cooler 26 and a fourth gas-liquid separator 27 for cooling the acrylic acid gas to obtain an acrylic acid product; the exhaust port of the fourth gas-liquid separator 27 is connected with a fourth vacuum pump 28 to vacuumize the de-weight tower 8 to form negative pressure; the liquid outlet of the fourth gas-liquid separator 27 is divided into two paths, one path is connected with the reflux liquid inlet of the weight removing tower 8, and the other path is a discharge port and connected with an acrylic acid product storage tank.
Claims (7)
1. A system of equipment for continuous production of acrolein and recovery of acrylic acid, comprising:
the product outlet of the acrolein reaction device (1) is connected with the gas phase feed inlet of the acid washing tower (2);
the upper part of the acid washing tower (2) is provided with a deionized water inlet, and a gas outlet at the top of the tower is connected with a gas inlet of the acrolein absorption tower (3); the upper part of the acrolein absorption tower (3) is provided with a deionized water inlet, and the tower top is provided with a gas outlet which is connected with a gas inlet of the tail gas purification device (12); the air outlet of the tail gas purifying device (12) is connected with the gas phase feed inlet of the acrolein reaction device (1); a discharge port at the bottom of the acrolein absorption tower (3) is connected with a liquid inlet of the acrolein refining tower (4) through a rich liquid pipe (L1); the acrolein refining tower (4) is a rectifying tower, a bottom discharge port is connected with a reflux liquid inlet at the upper part of the acrolein absorption tower (3) through a reflux lean liquid pipe (L2), and a top discharge port is connected with an acrolein product storage tank;
the bottom discharge port of the acid washing tower (2) is connected with the feed port of the acrolein removal tower (5); the acrolein removal tower (5) is a rectifying tower, a top discharge hole is connected with an acrolein product storage tank, and a bottom discharge hole is connected with a feed inlet of the extraction tower (6); the lower part of the extraction tower (6) is provided with an extractant inlet, the bottom is provided with a waste liquid discharge port, and the tower top air outlet is connected with a liquid material inlet of the solvent recovery tower (7); the solvent recovery tower (7) is a rectifying tower, a top discharge hole is connected with an extractant inlet at the lower part of the extraction tower (6), and a bottom discharge hole is connected with a liquid inlet of the weight removing tower (8); the heavy-removal tower (8) is a rectifying tower, a discharge hole at the top of the rectifying tower is connected with an acrylic acid product storage tank, and a waste liquid discharge hole at the bottom of the rectifying tower is formed.
2. The plant system for the continuous production of acrolein and recovery of acrylic acid according to claim 1, wherein the exhaust gas purifying device (12) is a catalytic oxidation device; the acid washing tower (2) is also provided with a first gas cooler (9) on a pipeline connected with the acrolein absorption tower (3).
3. The system of the apparatus for continuously producing acrolein and recovering acrylic acid according to claim 1, wherein a lean liquid/rich liquid heat exchanger (10) is provided at a junction of the rich liquid pipe (L1) and the return lean liquid pipe (L2); and an absorption liquid cooler is further arranged on the backflow lean liquid pipe (L2).
4. The device system for continuously producing acrolein and recovering acrylic acid according to claim 1, wherein the bottom of the acrolein refining column (4) is provided with a first reboiler (13), and the outlet of the top of the column is connected with a second gas cooler (14) and a first gas-liquid separator (15) in this order; the exhaust port of the first gas-liquid separator (15) is connected with a vacuum pump; the liquid outlet of the first gas-liquid separator (15) is divided into two paths, one path is connected with the reflux liquid inlet at the upper part of the acrolein refining tower (4), and the other path is a discharge port and is connected with an acrolein product storage tank.
5. The system for continuously producing acrolein and recovering acrylic acid according to claim 1, wherein the bottom of the acrolein removal column (5) is provided with a second reboiler (17), and the top outlet of the column is connected in this order to a third gas cooler (18) and a second gas-liquid separator (19); the exhaust port of the second gas-liquid separator (19) is connected with a vacuum pump; the liquid outlet of the second gas-liquid separator (19) is divided into two paths, one path is connected with a reflux liquid inlet at the upper part of the acrolein removal tower (5), and the other path is a discharge port and is connected with an acrolein product storage tank.
6. The system of the device for continuously producing acrolein and recovering acrylic acid according to claim 1, wherein the bottom of the solvent recovery column (7) is provided with a third reboiler (21), and the top outlet of the column is connected with a fourth gas cooler (22) and a third gas-liquid separator (23) in this order; the exhaust port of the third gas-liquid separator (23) is connected with a third vacuum pump (24); the liquid outlet of the third gas-liquid separator (23) is divided into two paths, one path is connected with the reflux liquid inlet of the solvent recovery tower (7), and the other path is a discharge port and is connected with the extractant inlet at the lower part of the extraction tower (6).
7. The system for continuously producing acrolein and recovering acrylic acid according to claim 1, wherein the bottom of the weight removing column (8) is provided with a fourth reboiler (25), and the top outlet of the column is connected with a fifth cooler (26) and a fourth gas-liquid separator (27) in this order; the exhaust port of the fourth gas-liquid separator (27) is connected with a fourth vacuum pump (28); the liquid outlet of the fourth gas-liquid separator (27) is divided into two paths, one path is connected with the reflux liquid inlet of the weight removing tower (8), and the other path is a discharge port and connected with an acrylic acid product storage tank.
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| CN202321906178.3U CN220546936U (en) | 2023-07-19 | 2023-07-19 | Device system for continuously producing acrolein and recycling acrylic acid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321906178.3U CN220546936U (en) | 2023-07-19 | 2023-07-19 | Device system for continuously producing acrolein and recycling acrylic acid |
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| CN220546936U true CN220546936U (en) | 2024-03-01 |
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| CN202321906178.3U Active CN220546936U (en) | 2023-07-19 | 2023-07-19 | Device system for continuously producing acrolein and recycling acrylic acid |
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| CN (1) | CN220546936U (en) |
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