CN220213960U - Maleic anhydride light component recovery system - Google Patents
Maleic anhydride light component recovery system Download PDFInfo
- Publication number
- CN220213960U CN220213960U CN202321462055.5U CN202321462055U CN220213960U CN 220213960 U CN220213960 U CN 220213960U CN 202321462055 U CN202321462055 U CN 202321462055U CN 220213960 U CN220213960 U CN 220213960U
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- maleic anhydride
- flash tank
- light component
- tank
- component recovery
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 238000011084 recovery Methods 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 62
- 238000009423 ventilation Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 229920006395 saturated elastomer Polymers 0.000 description 35
- 239000007788 liquid Substances 0.000 description 14
- 238000001704 evaporation Methods 0.000 description 10
- 230000008020 evaporation Effects 0.000 description 10
- 239000000498 cooling water Substances 0.000 description 9
- 239000006260 foam Substances 0.000 description 9
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 6
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 6
- 239000011976 maleic acid Substances 0.000 description 6
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical group CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 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
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 239000008258 liquid foam Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses a maleic anhydride light component recovery system which comprises a plurality of flash tanks which are arranged in series, and light component recovery tanks which are connected with the flash tanks which are connected in series, wherein a feed pipe is connected to the side wall of each flash tank, a steam exhaust pipe is connected to the top of each flash tank, a drain pipe is connected to the bottom of the side wall of each flash tank, the feed pipe on the flash tank of the next stage is connected with the drain pipe on the flash tank of the previous stage in the flash tanks which are connected in series in the plurality of stages, and the feed pipe, the steam exhaust pipe and the drain pipe are all communicated with the inner cavity of the flash tank.
Description
Technical Field
The utility model relates to the technical field of maleic anhydride production, in particular to a maleic anhydride light component recovery system.
Background
Maleic anhydride, simply maleic anhydride, also known as maleic anhydride, is a commonly used important organic chemical raw material. The main production method of maleic anhydride is n-butane oxidation method. The n-butane method is to gasify n-butane and mix it with air to enter a fixed bed tubular reactor to produce maleic anhydride through catalytic partial oxidation reaction. And (3) recovering the mixed gas containing the maleic anhydride generated by the maleic anhydride oxidation reaction in a maleic anhydride recovery section. At present, most of industrial maleic anhydride recovery processes adopt a water absorption method, the water absorption method utilizes the principle that water can react with maleic anhydride to generate maleic acid, water is used as an absorbent to absorb maleic anhydride in a gas phase to generate an maleic acid aqueous solution, xylene is used as an azeotropic dehydrating agent, free water in the maleic acid aqueous solution and water removed from maleic acid molecules are taken to the top of a tower, the xylene aqueous solution at the top of the tower is subjected to reduced pressure rectification and water separation, the xylene can be reused, a crude maleic anhydride product is obtained at the bottom of the tower, and a pure maleic anhydride product is obtained after the crude maleic anhydride is refined. The method is characterized in that a large amount of steam is consumed to gasify maleic acid aqueous solution when maleic anhydride is recovered in a rectifying tower, and maleic acid is repeatedly contacted with moisture in a high-temperature area of a stripping section, so that a large amount of saturated water containing maleic anhydride is generated.
Disclosure of Invention
In view of the above, the present utility model provides a maleic anhydride light component recovery system to solve the above-mentioned problems.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a maleic anhydride light component recovery system, includes the flash tank that multistage series connection set up, and with multistage series connection the light component recovery jar that flash tank all is connected, be connected with the inlet pipe on the lateral wall of flash tank, the top of flash tank is connected with the exhaust pipe, the lateral wall bottom of flash tank is connected with the fluid-discharge tube, in the flash tank of multistage series connection, the next grade on the flash tank the inlet pipe with last stage on the flash tank the fluid-discharge tube is connected, the inlet pipe the exhaust pipe with the fluid-discharge tube all with the inner chamber of flash tank is linked together.
Further, an air-permeable plate and a wire mesh foam remover are arranged in the inner cavity of the flash tank, the wire mesh foam remover is arranged at the top of the inner cavity of the flash tank, and the air-permeable plate is arranged below the wire mesh foam remover and is close to the feeding pipe.
Further, the ventilation plate comprises a plate body and a frame arranged at the edge of the plate body, wherein the frame is fixedly connected with the plate body or integrally formed with the plate body, and the plate body is detachably arranged on the side wall of the inner cavity of the flash tank through the frame.
Further, a plurality of ventilation holes are uniformly formed in the surface of the plate body.
Further, the light component recovery tank comprises a tank body and a shell sleeved on the periphery of the wall of the tank body, and the shell is fixedly connected with the tank body or integrally formed.
Further, a plurality of guide plates are arranged on two sides of the cavity wall of the inner cavity of the tank body in a staggered mode, and the guide plates are obliquely arranged and the distance between every two guide plates is equal.
Further, a discharging pipe is connected to the bottom of the side wall of the tank body, and the discharging pipe is arranged below the shell and is communicated with the inner cavity of the tank body.
Further, the inside of casing has been seted up and has been held the chamber, the lateral wall bottom of casing is connected with the circulating water and advances the pipe, the lateral wall top of casing is connected with the circulating water exit tube, the circulating water advance the pipe with the circulating water exit tube all with hold the chamber and be linked together, it is equipped with nanometer micropore heat-insulating board to hold to fix on the chamber wall in chamber.
Further, the maleic anhydride light component recovery system further comprises a conveying pipe connected between the flash tank and the light component recovery tank, and the steam exhaust pipe is connected with the conveying pipe.
The beneficial effects of the utility model are as follows:
the maleic anhydride light component recovery system comprises a flash tank and a light component recovery tank, wherein the flash tank is arranged in series and used for carrying out flash evaporation on saturated water, the light component recovery tank is connected with the flash tank in series and used for condensing maleic anhydride steam, a feeding pipe used for conveying high-pressure saturated water containing maleic anhydride is connected to the side wall of the flash tank, a steam exhaust pipe used for discharging maleic anhydride steam generated after flash evaporation is connected to the top of the flash tank, a low-pressure saturated water liquid discharge pipe is connected to the bottom of the side wall of the flash tank, a feeding pipe on the flash tank of the next stage is connected with the liquid discharge pipe on the flash tank of the previous stage, the high-pressure saturated water containing maleic anhydride is subjected to flash evaporation through the flash tank to form maleic anhydride steam and low-pressure saturated water, the low-pressure saturated water is conveyed into the flash tank of the next stage through a pipeline to be subjected to continuous flash evaporation to form maleic anhydride steam and saturated water, and the purpose of recovering the maleic anhydride in the saturated water is achieved, the concentration treatment step is omitted, and the maleic anhydride recovery efficiency in the saturated water is improved.
Drawings
The utility model is further described below with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the maleic anhydride light component recovery system of the present utility model;
FIG. 2 is a cross-sectional view of a flash tank in the maleic anhydride light component recovery system of the present utility model shown in FIG. 1;
FIG. 3 is a top view of a gas permeable panel in the flash tank shown in FIG. 2;
fig. 4 is a cross-sectional view of a light component recovery tank in the maleic anhydride light component recovery system of the present utility model shown in fig. 1.
In the figure: 100. maleic anhydride light component recovery system 1, flash tank, 11, inlet pipe, 12, exhaust pipe, 13, drain pipe, 14, ventilation plate, 141, plate body, 142, frame, 143, ventilation hole, 15, silk screen foam remover, 2, conveyer pipe, 3, light component recovery tank, 31, tank body, 311, deflector, 312, discharge pipe, 32, casing, 321, circulating water inlet pipe, 322, circulating water outlet pipe, 323, accommodation chamber, 324, nanometer micropore heat insulation board.
Detailed Description
The present utility model will now be described in detail with reference to the accompanying drawings. The figure is a simplified schematic diagram illustrating the basic structure of the utility model only by way of illustration, and therefore it shows only the constitution related to the utility model.
As shown in fig. 1, the present utility model provides a maleic anhydride light component recovery system 100 for recovering maleic anhydride in saturated water, the maleic anhydride light component recovery system 100 comprises a plurality of flash tanks 1 which are serially connected and used for flash evaporation of saturated water, a light component recovery tank 3 which is connected with the flash tanks 1 in series and used for condensation of maleic anhydride steam, and a conveying pipe 2 which is connected between the flash tanks 1 and the light component recovery tank 3 and used for conveying maleic anhydride steam, wherein high-pressure saturated water containing maleic anhydride is flashed by the flash tanks 1 to form maleic anhydride steam and low-pressure saturated water, the maleic anhydride steam is conveyed by the conveying pipe 2 into the light component recovery tank 3 to be condensed, and the low-pressure saturated water is conveyed by a pipeline into the flash tank 1 of the next stage to be flashed continuously to form the maleic anhydride steam and the saturated water, so that the purpose of recovering the maleic anhydride in the saturated water is achieved, the concentration treatment step is omitted, and the recovery efficiency of the maleic anhydride is improved.
As shown in fig. 1, a feeding pipe 11 for conveying high-pressure saturated water containing maleic anhydride is connected to the side wall of a flash tank 1, a steam exhaust pipe 12 for exhausting maleic anhydride steam generated after flash evaporation is connected to the top of the flash tank 1, a liquid discharge pipe 13 for exhausting low-pressure saturated water generated after flash evaporation is connected to the bottom of the side wall of the flash tank 1, the feeding pipe 11, the steam exhaust pipe 12 and the liquid discharge pipe 13 are all communicated with the inner cavity of the flash tank 1, the steam exhaust pipe 12 is connected with a conveying pipe 2, in the flash tanks 1 connected in series in multiple stages, the feeding pipe 11 on the flash tank 1 of the next stage is connected with the liquid discharge pipe 13 on the flash tank 1 of the previous stage; the high-pressure saturated water containing maleic anhydride enters the flash tank 1 to be flashed to form maleic anhydride steam and low-pressure saturated water, the maleic anhydride steam enters the conveying pipe 2 through the steam exhaust pipe 12 and is conveyed into the light component recovery tank 3 to be condensed, the low-pressure saturated water flows to the bottom of the flash tank 1 and is conveyed into the flash tank 1 of the next stage through the liquid exhaust pipe 13 and the feeding pipe 11 on the flash tank 1 of the next stage to be flashed continuously to form maleic anhydride steam and saturated water, and therefore the flash recovery of the maleic anhydride steam is completed.
As shown in fig. 1, fig. 2 and fig. 3, the inner cavity of the flash tank 1 is further provided with a ventilation plate 14 for uniformly distributing and flowing maleic anhydride steam and a wire mesh foam remover 15 for removing foam from maleic anhydride steam, the wire mesh foam remover 15 is arranged at the top of the inner cavity of the flash tank 1, the ventilation plate 14 is arranged below the wire mesh foam remover 15 and the ventilation plate 14 is close to the feeding pipe 11, the ventilation plate 14 comprises a plate body 141 and a frame 142 arranged at the edge of the plate body 141, the frame 142 is fixedly connected with the plate body 141 or integrally formed, the plate body 141 is detachably arranged on the side wall of the inner cavity of the flash tank 1 through the frame 142, a plurality of ventilation holes 143 for penetrating maleic anhydride steam are uniformly formed in the surface of the plate body 141, the high-pressure saturated water containing maleic anhydride entering the flash tank 1 forms maleic anhydride steam and low-pressure saturated water after being flashed, the maleic anhydride steam passes through the ventilation holes 143 on the ventilation plate 14, and then liquid foam is removed through the wire mesh foam remover 15, so that the liquid content of the maleic anhydride steam is effectively reduced, and the subsequent recovery efficiency of the maleic anhydride in the flash tank is improved.
As shown in fig. 1 and fig. 4, the light component recovery tank 3 comprises a tank body 31 for containing maleic anhydride steam and a shell 32 sleeved on the periphery of the side wall of the tank body 31 for carrying out heat exchange on the maleic anhydride steam in the tank body 31, a conveying pipe 2 is connected with the top of the tank body 31, a plurality of guide plates 311 for guiding condensed maleic anhydride to flow are arranged on two sides of the cavity wall of an inner cavity of the tank body 31 in a staggered manner, the guide plates 311 are obliquely arranged and the interval between every two guide plates 311 is equal, a discharge pipe 312 for discharging condensed maleic anhydride is connected to the bottom of the side wall of the tank body 31, and the discharge pipe 312 is arranged below the shell 32 and is communicated with the inner cavity of the tank body 31; casing 32 and jar body 31 fixed connection or integrated into one piece, the inside of casing 32 has offered and has been used for holding cooling water hold chamber 323, the lateral wall bottom of casing 32 is connected with and is used for carrying cooling water to advance pipe 321, the lateral wall top of casing 32 is connected with and is used for discharging cooling water's circulating water exit tube 322, circulating water advances pipe 321 and circulating water exit tube 322 all with hold chamber 323 and circulating water advances pipe 321 and circulating water exit tube 322 and set up the homonymy at casing 32, hold the fixed nanometer micropore insulation board 324 that is used for heat preservation and insulation that pastes on the chamber wall in chamber 323. When maleic anhydride steam is conveyed into the tank body 31 of the light component recovery tank 3 through the conveying pipe 2, cooling water subjected to heat exchange with the maleic anhydride steam is conveyed into the accommodating cavity 323 of the shell 32 through the circulating water inlet pipe 321, the maleic anhydride steam and the cooling water are subjected to heat exchange and then condensed into liquid, the liquid flows to the bottom of the inner cavity of the tank body 31 along the guide plate 311 and is discharged and collected through the discharging pipe 312 for subsequent treatment, and the cooling water entering the accommodating cavity 323 through the circulating water inlet pipe 321 is discharged out of the shell 32 through the circulating water outlet pipe 322 and then conveyed into the cooling tower for cooling treatment for recycling.
When the maleic anhydride-containing high-pressure saturated water is delivered into the flash tank 1 through the feed pipe 11 to be flashed to form maleic anhydride steam and low-pressure saturated water, the maleic anhydride steam enters the delivery pipe 2 through the steam discharge pipe 12 and is delivered into the light component recovery tank 3 to be condensed, the low-pressure saturated water flows to the bottom of the flash tank 1 and is delivered into the flash tank 1 at the next stage through the liquid discharge pipe 13 and the feed pipe 11 on the flash tank 1 at the next stage to be flashed to form maleic anhydride steam and saturated water, when the maleic anhydride steam is delivered into the tank 31 of the light component recovery tank 3 through the delivery pipe 2, the cooling water in heat exchange with the maleic anhydride steam is delivered into the accommodating cavity 323 of the shell 32 through the circulating water inlet pipe 321, the maleic anhydride steam and the cooling water are condensed into liquid after heat exchange, the liquid flows to the bottom of the inner cavity of the tank 31 through the discharge pipe 312 to be collected for subsequent treatment, the cooling water enters the accommodating cavity 323 through the circulating water inlet pipe 321 to be subjected to heat exchange, and then is delivered into the cooling tower to be cooled for cooling treatment after the cooling treatment for recycling.
The maleic anhydride light component recovery system 100 provided by the utility model comprises a flash tank 1 which is arranged in series in multiple stages and is used for carrying out flash evaporation on saturated water, and a light component recovery tank 3 which is connected with the flash tank 1 in series in multiple stages and is used for condensing maleic anhydride steam, wherein a feeding pipe 11 used for conveying high-pressure saturated water containing maleic anhydride is connected to the side wall of the flash tank 1, a steam exhaust pipe 12 used for discharging maleic anhydride steam generated after flash evaporation is connected to the top of the flash tank 1, a liquid discharge pipe 13 used for discharging low-pressure saturated water generated after flash evaporation is connected to the bottom of the side wall of the flash tank 1, in the flash tank 1 in series in multiple stages, the feeding pipe 11 on the flash tank 1 in the next stage is connected with the liquid discharge pipe 13 on the flash tank 1 in the previous stage, the maleic anhydride steam is conveyed into the light component recovery tank 3 through a conveying pipe 2 for condensation, and the low-pressure saturated water is conveyed into the flash tank 1 in the next stage through a pipeline for continuing to form the maleic anhydride steam and the saturated water, so that the purpose of concentrating the maleic anhydride in the saturated water is achieved, and the purpose of recycling the maleic anhydride is omitted.
While the above description has been made in terms of an ideal embodiment according to the present utility model, it is clear from the foregoing that various changes and modifications can be made by the person skilled in the relevant art without departing from the scope of the utility model, which is not limited to the details of the description, but must be determined from the scope of the claims.
Claims (9)
1. A maleic anhydride light component recovery system is characterized in that: including the flash tank that multistage series connection set up, and with multistage series connection the light component recovery tank that flash tank all is connected with, be connected with the inlet pipe on the lateral wall of flash tank, the top of flash tank is connected with the exhaust pipe, the lateral wall bottom of flash tank is connected with the fluid-discharge tube, in the flash tank of multistage series connection, on the flash tank of next grade the inlet pipe with on the flash tank the fluid-discharge tube is connected, the inlet pipe the exhaust pipe with the fluid-discharge tube all with the inner chamber of flash tank is linked together.
2. The maleic anhydride light component recovery system of claim 1, wherein: the utility model discloses a flash tank, including flash tank, wire mesh demister, air-permeable plate and wire mesh demister, install in the inner chamber of flash tank ventilative plate and wire mesh demister, the wire mesh demister sets up the inner chamber top of flash tank, ventilative plate sets up the below of wire mesh demister just ventilative plate is close to the inlet pipe sets up.
3. The maleic anhydride light component recovery system of claim 2, wherein: the breathable plate comprises a plate body and a frame arranged at the edge of the plate body, wherein the frame is fixedly connected with the plate body or integrally formed with the plate body, and the plate body is detachably arranged on the side wall of the inner cavity of the flash tank through the frame.
4. A maleic anhydride light component recovery system as in claim 3, wherein: a plurality of ventilation holes are uniformly formed in the surface of the plate body.
5. The maleic anhydride light component recovery system of claim 1, wherein: the light component recovery tank comprises a tank body and a shell sleeved on the periphery of the wall of the tank body, and the shell is fixedly connected with the tank body or integrally formed.
6. The maleic anhydride light component recovery system of claim 5, wherein: a plurality of guide plates are arranged on two sides of the cavity wall of the inner cavity of the tank body in a staggered mode, and the guide plates are obliquely arranged and the distance between every two guide plates is equal.
7. The maleic anhydride light component recovery system of claim 5, wherein: the side wall bottom of the tank body is connected with a discharging pipe, and the discharging pipe is arranged below the shell and is communicated with the inner cavity of the tank body.
8. The maleic anhydride light component recovery system of claim 5, wherein: the inside of casing has been seted up and has been held the chamber, the lateral wall bottom of casing is connected with the circulating water and advances the pipe, the lateral wall top of casing is connected with the circulating water exit tube, the circulating water advance the pipe with the circulating water exit tube all with hold the chamber and be linked together, hold the fixed subsides of chamber wall in chamber and be equipped with nanometer micropore heat-insulating board.
9. The maleic anhydride light component recovery system of claim 1, wherein: the maleic anhydride light component recovery system further comprises a conveying pipe connected between the flash tank and the light component recovery tank, and the steam exhaust pipe is connected with the conveying pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321462055.5U CN220213960U (en) | 2023-06-08 | 2023-06-08 | Maleic anhydride light component recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321462055.5U CN220213960U (en) | 2023-06-08 | 2023-06-08 | Maleic anhydride light component recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220213960U true CN220213960U (en) | 2023-12-22 |
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ID=89188252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321462055.5U Active CN220213960U (en) | 2023-06-08 | 2023-06-08 | Maleic anhydride light component recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220213960U (en) |
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2023
- 2023-06-08 CN CN202321462055.5U patent/CN220213960U/en active Active
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