CN111001359A - Acrolein tail gas treatment system - Google Patents
Acrolein tail gas treatment system Download PDFInfo
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- CN111001359A CN111001359A CN201911396712.9A CN201911396712A CN111001359A CN 111001359 A CN111001359 A CN 111001359A CN 201911396712 A CN201911396712 A CN 201911396712A CN 111001359 A CN111001359 A CN 111001359A
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- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical compound C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 title claims abstract description 284
- 239000007789 gas Substances 0.000 claims abstract description 130
- 239000002351 wastewater Substances 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- 230000003197 catalytic effect Effects 0.000 claims abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003546 flue gas Substances 0.000 claims abstract description 16
- 239000002918 waste heat Substances 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000000746 purification Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 50
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 50
- 238000005554 pickling Methods 0.000 claims description 45
- 238000003860 storage Methods 0.000 claims description 34
- 239000002253 acid Substances 0.000 claims description 31
- 239000006200 vaporizer Substances 0.000 claims description 31
- 238000010521 absorption reaction Methods 0.000 claims description 30
- 239000002699 waste material Substances 0.000 claims description 18
- 150000001299 aldehydes Chemical class 0.000 claims description 4
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 abstract description 20
- 239000000126 substance Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 231100000331 toxic Toxicity 0.000 abstract description 3
- 230000002588 toxic effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 20
- 238000005406 washing Methods 0.000 description 18
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 11
- 239000003595 mist Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- OTLLISYHVPWWCF-UHFFFAOYSA-N prop-2-enal;hydrate Chemical compound O.C=CC=O OTLLISYHVPWWCF-UHFFFAOYSA-N 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J7/00—Apparatus for generating gases
- B01J7/02—Apparatus for generating gases by wet methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
- C07C45/34—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds
- C07C45/35—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds in propene or isobutene
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/783—Separation; Purification; Stabilisation; Use of additives by gas-liquid treatment, e.g. by gas-liquid absorption
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C45/82—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
Abstract
An acrolein tail gas treatment system comprises a raw material pretreatment device, an acrolein reaction and collection device, an acrolein wastewater collection device and a purification device, wherein the purification device is arranged in the scheme, acrolein tail gas is firstly conveyed into a plate heat exchanger for cooling, then the cooled tail gas is conveyed into a tail gas saturation tower, the mixed gas of trace acrolein, acetaldehyde and water vapor is gathered at the top of the tail gas saturation tower, the mixed gas is conveyed to a tail gas preheater for preheating and then conveyed to a catalytic incineration reactor for incineration, the method has the advantages that toxic and harmful substances in the mixed gas are incinerated, the harmless treatment of the mixed gas is realized to the greatest extent, the incinerated tail gas sequentially passes through the tail gas preheater, the waste heat boiler and the plate heat exchanger to realize the recycling of waste heat in the tail gas, and then the tail gas reaching the standard is discharged into a chimney through the induced draft fan and the flue gas condenser. Through the arrangement, the standard emission of acrolein tail gas is realized, the service life of the incineration reactor is prolonged, and the flue gas treatment cost is reduced.
Description
Technical Field
The invention relates to the technical field of tail gas treatment, in particular to an acrolein tail gas treatment system.
Background
The method comprises the steps of weighing propylene, air and steam (water) according to the proportion requirement, preheating the air and the steam (water) by an air saturation tower, conveying the preheated air and the steam (water) to a reaction tower, carrying out catalytic oxidation reaction on the preheated air and the vaporized propylene in the reaction tower at 350-450 ℃, conveying a reaction product at the tower bottom of the reaction tower to an acid washing tower, discharging waste water containing acrylic acid, acrolein, acetic acid and the like from the tower bottom of the acid washing tower, wherein the content of the acrolein and the acetic acid is less, called acrylic acid waste water at the tower bottom of the acid washing tower for short, discharging mixed gas containing the acrolein, the acetaldehyde, the air and the like from the tower top of the acid washing tower, conveying the mixed gas into an absorption tower, discharging 4% of acrolein water solution from the tower bottom of the absorption tower, discharging tail gas containing trace amounts of the acrolein and the acetaldehyde from the tower top of the absorption tower, conveying the 4% of the acrolein water solution into an acrolein rectifying tower for distillation, discharging acrolein gas from the tower, and a certain amount of acrolein still exists in the acrolein wastewater, and the acrolein can still be recycled.
The tail gas containing micro acrolein and acetaldehyde (acrolein tail gas for short) discharged from the top of the absorption tower is usually directly conveyed to a caustic pool for absorption, but because the tail gas contains organic matters and other complex components, the tail gas is difficult to meet the emission standard after being treated, or the tail gas is directly conveyed to a combustor for incineration, although the tail gas can meet the emission standard after being treated, the incinerator is easy to corrode and structure, and the service life of the incinerator is shortened.
Disclosure of Invention
In view of the above, it is necessary to provide an acrolein tail gas treatment system.
An acrolein tail gas treatment system comprises a raw material pretreatment device, an acrolein reaction and collection device, an acrolein wastewater collection device and a purification device, wherein the raw material pretreatment device comprises a propylene vaporizer, a Roots blower and an air saturation tower, a first inlet of the propylene vaporizer is connected with a propylene storage tank, a first outlet of the propylene vaporizer is connected with an inlet of the top of a reaction tower, an inlet of a kettle of the air saturation tower is connected with the Roots blower, an inlet of the top of the air saturation tower is connected with a first outlet of a kettle of a rectification tower, an outlet of the top of the air saturation tower is connected with an inlet of the top of the reaction tower, the acrolein reaction and collection device comprises a reaction tower, a first pickling tower, a second pickling tower, a waste acid water tank, an absorption tower, a rectification tower and an acrolein storage tank, an outlet of the kettle of the reaction tower is connected with the first inlet of the kettle of the pickling tower, an outlet of the top of the pickling tower is connected with the inlet of the kettle of the, the second inlet of the tower kettle of the first pickling tower is connected with the second outlet of the propylene vaporizer, the outlet of the tower kettle of the first pickling tower is connected with the inlet of the tower top of the second pickling tower, the outlet of the tower top of the second pickling tower is connected with the third inlet of the tower kettle of the first pickling tower, the first outlet of the tower kettle of the second pickling tower is connected with the waste acid water tank, the outlet of the tower kettle of the absorption tower is connected with the middle part of the rectifying tower, the inlet of the tower top of the absorption tower is connected with the outlet of the acrolein wastewater storage tank, the first outlet of the tower kettle of the rectifying tower is connected with the inlet of the tower top of the air saturation tower, the first outlet of the tower kettle of the rectifying tower is also connected with the second inlet of the propylene vaporizer, the tower top of the rectifying tower is connected with the acrolein storage tank, the acrolein wastewater collection device of the acrolein comprises an ice machine set and the acrolein wastewater storage tank, the inlet of the ice machine set is connected, the purification device comprises a tail gas saturation tower, a tail gas saturation tower demister, a tail gas preheater, a catalytic incineration reactor, a waste heat boiler, a plate heat exchanger, an induced draft fan, a cooling fan and a flue gas condenser, wherein a second inlet of the plate heat exchanger is connected with a tower top outlet of an absorption tower, a second outlet of the plate heat exchanger is connected with a tower kettle inlet of the tail gas saturation tower, a tower top outlet of the tail gas saturation tower is connected with a demister inlet of the tail gas saturation tower, an outlet of the demister of the tail gas saturation tower is connected with a first inlet of the tail gas preheater, a first outlet of the tail gas preheater is connected with a catalytic incineration reactor inlet, an outlet of the catalytic incineration reactor is connected with a second inlet of the tail gas preheater, an inlet of the waste heat boiler is connected with a second outlet of the tail gas preheater, the first inlet of the plate heat exchanger is connected with, the outlet of the induced draft fan is connected with the inlet of the flue gas condenser, and the cooling fan is connected with the third inlet of the tail gas preheater.
Preferably, a propylene buffer tank is further arranged on a pipeline connecting the first outlet of the propylene vaporizer and the inlet of the top of the reaction tower, a waste aldehyde water heat exchanger is further arranged on a pipeline connecting the inlet of the top of the air saturation tower and the first outlet of the rectifying tower kettle, and a demister is further arranged on a pipeline connecting the outlet of the top of the air saturation tower and the inlet of the top of the reaction tower.
Preferably, a first reboiler is further arranged on one side of the rectifying tower kettle, an inlet of the first reboiler is connected with a second outlet of the rectifying tower kettle, an outlet of the first reboiler is connected with an inlet of the rectifying tower kettle, and a condenser is further arranged on a pipeline connecting the top of the rectifying tower and the acrolein storage tank.
Preferably, an internal circulating pump is further arranged on a pipeline connecting the inlet of the ice machine set and the second outlet of the propylene vaporizer, and an external circulating pump is further arranged on a pipeline connecting the outlet of the acrolein waste water storage tank and the inlet of the top of the absorption tower.
Preferably, a second reboiler is further arranged on one side of the tower kettle of the second pickling tower, an inlet of the second reboiler is connected with a second outlet of the tower kettle of the second pickling tower, and an outlet of the second reboiler is connected with an inlet of the tower kettle of the second pickling tower.
This scheme is provided with purifier, carries acrolein tail gas earlier and cools down in plate heat exchanger, carries the tail gas after will cooling to the tail gas saturation tower again, the gathering of tail gas saturation tower top of the tower has trace acrolein, the mist of acetaldehyde and steam, carry the mist to the tail gas preheater and preheat, carry again and burn in the catalytic incineration reactor to burn the poisonous and harmful substance in the mist, the at utmost realizes the innocent treatment of mist, the tail gas after will burning loops through the tail gas preheater again, exhaust-heat boiler, plate heat exchanger realizes the recovery of waste heat in the tail gas and recycles, then through the draught fan, flue gas condenser is up to standard exhaust emission to the chimney in. Through the arrangement, the standard emission of acrolein tail gas is realized, the service life of the incineration reactor is prolonged, and the flue gas treatment cost is reduced.
Drawings
FIG. 1 is a schematic diagram of an acrolein tail gas treatment system.
In the figure: the system comprises a propylene vaporizer 11, a propylene buffer tank 111, a Roots blower 12, an air saturation tower 13, a waste aldehyde water heat exchanger 131, a demister 132, a reaction tower 21, a first pickling tower 22, a second pickling tower 27, a second reboiler 271, a waste acid water tank 23, an absorption tower 24, a rectifying tower 25, a first reboiler 251, a condenser 252, an acrolein storage tank 26, an ice machine set 31, an internal circulation pump 311, an external circulation pump 312, an acrolein waste water storage tank 32, a tail gas saturation tower 51, a tail gas saturation tower demister 52, a tail gas preheater 53, a catalytic incineration reactor 54, a waste heat boiler 55, a plate heat exchanger 56, an induced draft fan 57, a cooling fan 58 and a flue gas condenser 59; a chimney 100.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1, the invention provides an acrolein tail gas treatment system, which comprises a raw material pretreatment device, an acrolein reaction and collection device, an acrolein wastewater collection device and a purification device;
the raw material pretreatment device comprises a propylene vaporizer 11, a Roots blower 12 and an air saturation tower 13, wherein a first inlet of the propylene vaporizer 11 is connected with a propylene storage tank to vaporize propylene conveyed by the propylene storage tank, a first outlet of the propylene vaporizer 11 is connected with a top inlet of a reaction tower 21 to convey vaporized propylene to the top inlet of the reaction tower 21, a kettle inlet of the air saturation tower 13 is connected with the Roots blower 12, the Roots blower 12 continuously conveys air to the air saturation tower 13, the air flows from the kettle of the air saturation tower 13 to the top of the tower, the top inlet of the air saturation tower 13 is connected with a first outlet of a kettle 25 of a rectifying tower to convey acrolein wastewater discharged from the first outlet of the kettle 25 of the rectifying tower to the top inlet of the air saturation tower 13, and the acrolein wastewater and the air are fully and uniformly mixed in the air saturation tower 13, forming a mixed gas of air and water vapor, wherein the top outlet of the air saturation tower 13 is connected with the top inlet of the reaction tower 21 so as to convey the mixed gas of air and water vapor which are uniformly mixed into the top inlet of the reaction tower 21, propylene, air and water vapor are subjected to catalytic oxidation reaction in the reaction tower 21, the reaction product comprises 85-95% of acrolein and 10-15% of acrylic acid, and the balance is acetic acid, acetaldehyde and other byproducts within 5%;
the acrolein reaction and collection device comprises a reaction tower 21, a first pickling tower 22, a second pickling tower 27, a waste acid water tank 23, an absorption tower 24, a rectifying tower 25 and an acrolein storage tank 26, wherein an outlet of a tower kettle of the reaction tower 21 is connected with a first inlet of a tower kettle of the first pickling tower 22 so as to convey reaction products discharged from the tower kettle of the reaction tower 21 to the first pickling tower 22, the first pickling tower 22 separates acrylic acid and acetic acid with high boiling points from acrolein and acetaldehyde with low boiling points, an outlet of the tower top of the first pickling tower 22 is connected with an inlet of the tower kettle of the absorption tower 24 so as to convey mixed gas containing acrolein, acetaldehyde and air to the tower kettle of the absorption tower 24, a second inlet of the tower kettle of the first pickling tower 22 is connected with a second outlet of a propylene vaporizer 11 so as to convey acrolein wastewater absorbed by the propylene vaporizer 11 to the tower kettle of the first pickling tower 22 so as to supplement water consumption in the first pickling tower 22, meanwhile, the first acid washing tower 22 continuously separates out residual acrolein in the acrolein waste water, so that the residual acrolein is discharged from the top of the first acid washing tower 22 after being acid-washed and recycled, and the yield of the acrolein is improved, the outlet of the tower bottom of the first acid washing tower 22 is connected with the inlet of the tower top of the second acid washing tower 27 so as to convey waste acid water containing acrylic acid, acrolein and acetic acid to the second acid washing tower 27, the second acid washing tower 27 continuously evaporates the waste acid water containing acrylic acid, acrolein and acetic acid so as to separate the acrolein from the waste acid water, the acrolein steam is gathered at the top of the second acid washing tower 27, the residual product is gathered at the tower bottom of the second acid washing tower 27 to become acrylic acid waste water, the outlet of the tower top of the second acid washing tower 27 is connected with the third inlet of the tower bottom of the first acid washing tower 22 so as to convey the separated acrolein steam to the first acid washing tower 22, and the first acid washing tower 22 continuously separates out residual acrolein in the acrolein steam, the residual acrolein is discharged from the top of the first acid washing tower 22 after being acid-washed and recycled again, so as to improve the yield of the acrolein, the first outlet of the tower kettle of the second acid washing tower 27 is connected with the waste acid water tank 23, so as to convey the acrylic acid wastewater into the waste acid water tank 23 for treatment of a subsequent purification device, the outlet of the tower kettle of the absorption tower 24 is connected with the middle part of the rectifying tower 25, so as to convey the 4% acrolein aqueous solution into the rectifying tower 25, the inlet of the tower top of the absorption tower 24 is connected with the outlet of the acrolein wastewater storage tank 32, so as to convey the acrolein wastewater in the acrolein wastewater storage tank 32 into the absorption tower 24, so as to supplement the water consumption in the absorption tower 24, and also dissolve the residual acrolein in the water in the acrolein wastewater, so as to be recycled again, so as to improve the yield of the acrolein, the first outlet of the tower kettle of the rectifying tower 25 is connected with the inlet of the tower top of the air saturation, the first outlet of the tower bottom of the rectifying tower 25 is also connected with the second inlet of the propylene vaporizer 11 so as to convey the acrolein wastewater into the propylene vaporizer 11, and since the acrolein wastewater contains higher heat energy, the propylene in the propylene vaporizer 11 can be vaporized, the energy utilization rate of the acrolein wastewater is improved, the propylene vaporization does not need to use additional electric energy, and the propylene vaporization cost is greatly reduced, the tower top of the rectifying tower 25 is connected with an acrolein storage tank 26 so as to convey the rectified acrolein into the acrolein storage tank 26 for storage;
the acrolein wastewater collection device comprises an ice unit 31 and an acrolein wastewater storage tank 32, wherein an inlet of the ice unit 31 is connected with a second outlet of the propylene vaporizer 11 so as to cool and condense the acrolein wastewater cooled by the propylene vaporizer 11, and an outlet of the ice unit 31 is connected with an inlet of the acrolein wastewater storage tank 32 so as to convey the acrolein wastewater to the acrolein wastewater storage tank 32 for storage;
purifier includes tail gas saturation tower 51, tail gas saturation tower defroster 52, tail gas preheater 53, catalytic incineration reactor 54, exhaust-heat boiler 55, plate heat exchanger 56, draught fan 57, cooling fan 58, flue gas condenser 59, 56 second entrances of plate heat exchanger and 24 top of the tower exit linkage of absorption tower to carry out the cooling to plate heat exchanger 56 with acrolein tail gas that the tail gas contains trace acrolein, acetaldehyde in absorption tower 24 top of the tower to retrieve waste heat in the tail gas, ensure that the tail gas temperature after the heat transfer satisfies tail gas saturation tower 51 tower cauldron entry temperature, 56 second exits of plate heat exchanger and 51 tower cauldron entry linkage of tail gas saturation tower, remaining minim amount acrylic acid in the tail gas saturation tower 51 absorption tail gas, tail gas saturation tower 51 tower cauldron forms the acrylic acid waste liquid, the gathering of tail gas saturation tower 51 top of the tower has trace acrolein, acrolein 51 tower top of the tower, The mixed gas of acetaldehyde and water vapor, the outlet of the top of the tail gas saturation tower 51 is connected with the inlet of a tail gas saturation tower demister 52, the tail gas saturation tower demister 52 removes fog particles in the mixed gas and avoids the fog particles from blocking, corroding and scaling downstream equipment, the outlet of the tail gas saturation tower demister 52 is connected with a first inlet of a tail gas preheater 53 so as to convey the demisted mixed gas to the tail gas preheater 53 for preheating, the first outlet of the tail gas preheater 53 is connected with an inlet of a catalytic incineration reactor 54 so as to convey the preheated mixed gas to the catalytic incineration reactor 54, the catalytic incineration reactor 54 carries out high-temperature incineration on the mixed gas, organic substances are decomposed and destroyed by utilizing heat energy, toxic and harmful substances are incinerated, the harmless treatment of the mixed gas is realized to the greatest extent, the outlet of the catalytic incineration reactor 54 is connected with a second inlet of the tail gas preheater 53, further preheat in order to carry the tail gas after burning to tail gas preheater 53, exhaust-heat boiler 55 entry and tail gas preheater 53 second exit linkage, exhaust-heat boiler 55 retrieves the waste heat in the tail gas after preheating, carries the hot water that produces to the production line and supplies the circulation to recycle, the first entry of plate heat exchanger 56 and exhaust-heat boiler 55 exit linkage, plate heat exchanger 56 further retrieves the waste heat in the tail gas, carries the hot water that produces to the production line and supplies the circulation to recycle, draught fan 57 entry and the first exit linkage of plate heat exchanger 56, draught fan 57 export and flue gas condenser 59 entry linkage to with the tail gas after the heat transfer is with higher speed to be extracted to flue gas condenser 59 in, flue gas condenser 59 further cools down the tail gas, flue gas condenser 59 export is connected with outside chimney 100 to discharge the tail gas to in chimney 100, the temperature reduction fan 58 is connected to the third inlet of the tail gas preheater 53 to deliver air into the tail gas preheater 53 to deliver air to the catalytic incineration reactor 54.
According to the scheme, the acrolein wastewater at the first outlet of the tower kettle of the rectifying tower 25 is divided into two paths, one path of the acrolein wastewater is conveyed to the inlet at the top of the air saturation tower 13 to provide water vapor for the air saturation tower 13, and the acrolein wastewater has high heat energy, so that not only can the water resource be recycled, but also the heating energy consumption of the air saturation tower 13 can be reduced, the energy utilization rate of the acrolein wastewater is improved, meanwhile, the residual acrolein in the acrolein wastewater is dissolved in the water vapor again, enters the reaction tower 21 along with the water vapor and the air, and is recycled again, and the yield of the acrolein is improved; the other path is conveyed to a second inlet of the propylene vaporizer 11, the acrolein wastewater has higher heat energy and can vaporize propylene in the propylene vaporizer 11, the energy utilization rate of the acrolein wastewater is improved, the propylene vaporization cost is greatly reduced, a second outlet of the propylene vaporizer 11 divides the acrolein wastewater with reduced temperature into two paths again, one path is conveyed to a second inlet of a tower bottom of the first pickling tower 22 to supplement the water consumption in the first pickling tower 22, meanwhile, the first pickling tower 22 continuously separates out residual acrolein in the acrolein wastewater, the residual acrolein is discharged from the tower top of the first pickling tower 22 after being pickled, the residual acrolein is recycled again, the acrolein yield is improved, the other path is conveyed to an ice maker set 31, the ice maker set 31 further reduces the temperature of the acrolein wastewater, the acrolein wastewater is stored in an acrolein wastewater storage tank 32, and then the acrolein wastewater in the acrolein wastewater storage tank 32 is conveyed to an absorption tower 24, not only the water consumption in the absorption tower 24 is supplemented, but also the residual acrolein in the acrolein waste water is dissolved in the water to form 4% acrolein water solution which is recycled, thereby improving the yield of the acrolein. Through the arrangement, the total yield of the acrolein is greatly improved, the total yield of the acrolein is improved from 93% to 98%, and the economic benefit of the acrolein is obviously improved.
According to the scheme, acrolein tail gas is conveyed to the plate heat exchanger 56 to be cooled firstly, the temperature of the tail gas subjected to heat exchange is ensured to meet the inlet temperature of a tower kettle of the tail gas saturation tower 51, the cooled tail gas is conveyed to the tail gas saturation tower 51, the mixed gas of trace acrolein, acetaldehyde and water vapor is gathered at the top of the tail gas saturation tower 51, the mixed gas is conveyed to the tail gas preheater 53 to be preheated and then conveyed to the catalytic incineration reactor 54 to be incinerated, toxic and harmful substances in the mixed gas are incinerated, harmless treatment of the mixed gas is realized to the maximum extent, the incinerated tail gas sequentially passes through the tail gas preheater 53, the waste heat boiler 55 and the plate heat exchanger 56 to realize the recycling of waste heat in the tail gas, and then the tail gas reaching the standard is discharged to the chimney 100 through the draught fan 57 and the flue gas. Through the arrangement, the standard emission of acrolein tail gas is realized, the service life of the incineration reactor is prolonged, and the flue gas treatment cost is reduced.
Further, a propylene buffer tank 111 is further arranged on a pipeline connecting the first outlet of the propylene vaporizer 11 and the top inlet of the reaction tower 21 to adjust the pressure of the vaporized propylene, a waste aldehyde water heat exchanger 131 is further arranged on a pipeline connecting the top inlet of the air saturation tower 13 and the first outlet of the rectifying tower 25 to increase the temperature of the acrolein waste water, ensure that the water vapor and the air in the air saturation tower 13 are fully mixed and have high enough temperature, so that the temperature of the water vapor and the air in the top outlet of the air saturation tower 13 meets the temperature requirement of the top inlet of the reaction tower 21, and a demister 132 is further arranged on a pipeline connecting the top outlet of the air saturation tower 13 and the top inlet of the reaction tower 21 to remove mist particles in the water vapor and the air, thereby avoiding the mist particles from causing blockage, corrosion and scaling on downstream equipment.
Further, a first reboiler 251 is further arranged on one side of the tower bottom of the rectifying tower 25 to heat the tower bottom of the rectifying tower 25, so that the rectifying efficiency of the rectifying tower 25 on acrolein is improved, an inlet of the first reboiler 251 is connected with a second outlet of the tower bottom of the rectifying tower 25, an outlet of the first reboiler 251 is connected with an inlet of the tower bottom of the rectifying tower 25 to circularly heat an acrolein water solution in the rectifying tower 25, and a condenser 252 is further arranged on a pipeline connecting the tower top of the rectifying tower 25 and the acrolein storage tank 26 to accelerate the condensation efficiency of acrolein gas and improve the collection amount of the acrolein storage tank 26.
Further, an internal circulation pump 311 is further disposed on a pipeline connecting an inlet of the ice making unit 31 and a second outlet of the propylene vaporizer 11 to increase a delivery rate of the acrolein wastewater from the second outlet of the propylene vaporizer 11 to the inlet of the ice making unit 31, and an external circulation pump 312 is further disposed on a pipeline connecting an outlet of the acrolein wastewater storage tank 32 and an inlet at the top of the absorption tower 24 to increase a delivery rate of the acrolein wastewater from the acrolein wastewater storage tank 32 to the absorption tower 24.
Further, No. two pickling tower 27 tower cauldron one side still is provided with second reboiler 271, second reboiler 271 entry and No. two pickling tower 27 tower cauldron second exit linkage, second reboiler 271 export and No. two pickling tower 27 tower cauldron entry linkage to improve No. two pickling tower 27 and to containing acrylic acid, acrolein, acetic acid waste acid water's back steaming efficiency, impel acrolein to follow waste acid aquatic quick separation.
The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. An acrolein tail gas processing system which characterized in that: the device comprises a raw material pretreatment device, an acrolein reaction and collection device, an acrolein wastewater collection device and a purification device, wherein the raw material pretreatment device comprises a propylene vaporizer, a Roots blower and an air saturation tower, a first inlet of the propylene vaporizer is connected with a propylene storage tank, a first outlet of the propylene vaporizer is connected with an inlet of the top of a reaction tower, an inlet of the kettle of the air saturation tower is connected with the Roots blower, an inlet of the top of the air saturation tower is connected with a first outlet of a tower kettle of a rectification tower, an outlet of the top of the air saturation tower is connected with an inlet of the top of the reaction tower, the acrolein reaction and collection device comprises a reaction tower, a first pickling tower, a second pickling tower, a waste acid water tank, an absorption tower, a rectification tower and an acrolein storage tank, an outlet of the tower kettle of the reaction tower is connected with the first inlet of the tower kettle of the pickling tower, an outlet of the top of the first pickling tower is connected with, the second inlet of the tower kettle of the first pickling tower is connected with the second outlet of the propylene vaporizer, the outlet of the tower kettle of the first pickling tower is connected with the inlet of the tower top of the second pickling tower, the outlet of the tower top of the second pickling tower is connected with the third inlet of the tower kettle of the first pickling tower, the first outlet of the tower kettle of the second pickling tower is connected with the waste acid water tank, the outlet of the tower kettle of the absorption tower is connected with the middle part of the rectifying tower, the inlet of the tower top of the absorption tower is connected with the outlet of the acrolein wastewater storage tank, the first outlet of the tower kettle of the rectifying tower is connected with the inlet of the tower top of the air saturation tower, the first outlet of the tower kettle of the rectifying tower is also connected with the second inlet of the propylene vaporizer, the tower top of the rectifying tower is connected with the acrolein storage tank, the acrolein wastewater collection device of the acrolein comprises an ice machine set and the acrolein wastewater storage tank, the inlet of the ice machine set is connected, the purification device comprises a tail gas saturation tower, a tail gas saturation tower demister, a tail gas preheater, a catalytic incineration reactor, a waste heat boiler, a plate heat exchanger, an induced draft fan, a cooling fan and a flue gas condenser, wherein a second inlet of the plate heat exchanger is connected with a tower top outlet of an absorption tower, a second outlet of the plate heat exchanger is connected with a tower kettle inlet of the tail gas saturation tower, a tower top outlet of the tail gas saturation tower is connected with a demister inlet of the tail gas saturation tower, an outlet of the demister of the tail gas saturation tower is connected with a first inlet of the tail gas preheater, a first outlet of the tail gas preheater is connected with a catalytic incineration reactor inlet, an outlet of the catalytic incineration reactor is connected with a second inlet of the tail gas preheater, an inlet of the waste heat boiler is connected with a second outlet of the tail gas preheater, the first inlet of the plate heat exchanger is connected with, the outlet of the induced draft fan is connected with the inlet of the flue gas condenser, and the cooling fan is connected with the third inlet of the tail gas preheater.
2. The acrolein tail gas treatment system of claim 1, wherein: the pipeline that the first export of propylene vaporizer and reaction tower top entry are connected still is provided with the propylene buffer tank, still be provided with waste aldehyde water heat exchanger on the pipeline of air saturation tower top entry and the first exit linkage of rectifying column tower cauldron, still be provided with the defroster on the pipeline of air saturation tower top export and reaction tower top entry connection.
3. The acrolein tail gas treatment system of claim 1, wherein: and a first reboiler is further arranged on one side of the tower kettle of the rectifying tower, the inlet of the first reboiler is connected with the second outlet of the tower kettle of the rectifying tower, the outlet of the first reboiler is connected with the inlet of the tower kettle of the rectifying tower, and a condenser is further arranged on a pipeline for connecting the top of the rectifying tower with an acrolein storage tank.
4. The acrolein tail gas treatment system of claim 1, wherein: an inner circulating pump is further arranged on a pipeline connecting an inlet of the ice machine set and a second outlet of the propylene vaporizer, and an outer circulating pump is further arranged on a pipeline connecting an outlet of the acrolein waste water storage tank and an inlet at the top of the absorption tower.
5. The acrolein tail gas treatment system of claim 1, wherein: a second reboiler is further arranged on one side of the tower kettle of the second pickling tower, the inlet of the second reboiler is connected with a second outlet of the tower kettle of the second pickling tower, and the outlet of the second reboiler is connected with the inlet of the tower kettle of the second pickling tower.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2735989A1 (en) * | 1995-06-29 | 1997-01-03 | Rhone Poulenc Nutrition Animal | PROCESS AND PLANT FOR PURIFYING A GAS FLOW CONTAINING ACROLEIN |
| CN105461532A (en) * | 2015-11-26 | 2016-04-06 | 山东新和成氨基酸有限公司 | Clean production method for preparation of acrolein and acrylic acid through oxidation of propene |
| CN106631759A (en) * | 2016-12-09 | 2017-05-10 | 中国化学赛鼎宁波工程有限公司 | System and method for simultaneously producing methacrylic acid and methacrolein |
| CN206604215U (en) * | 2017-03-20 | 2017-11-03 | 河南精众生物科技有限公司 | A kind of propylene evaporation equipment |
| CN109603429A (en) * | 2018-11-14 | 2019-04-12 | 惠州宇新化工有限责任公司 | A kind of raw air preprocess method |
| CN110357189A (en) * | 2019-07-19 | 2019-10-22 | 范县金海德科贸有限公司 | The pollutant treatment technique of hydrocarbon oxygen compound |
| CN211562888U (en) * | 2019-12-30 | 2020-09-25 | 宁夏荆洪生物科技有限公司 | Acrolein tail gas treatment system |
-
2019
- 2019-12-30 CN CN201911396712.9A patent/CN111001359A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2735989A1 (en) * | 1995-06-29 | 1997-01-03 | Rhone Poulenc Nutrition Animal | PROCESS AND PLANT FOR PURIFYING A GAS FLOW CONTAINING ACROLEIN |
| CN105461532A (en) * | 2015-11-26 | 2016-04-06 | 山东新和成氨基酸有限公司 | Clean production method for preparation of acrolein and acrylic acid through oxidation of propene |
| CN106631759A (en) * | 2016-12-09 | 2017-05-10 | 中国化学赛鼎宁波工程有限公司 | System and method for simultaneously producing methacrylic acid and methacrolein |
| CN206604215U (en) * | 2017-03-20 | 2017-11-03 | 河南精众生物科技有限公司 | A kind of propylene evaporation equipment |
| CN109603429A (en) * | 2018-11-14 | 2019-04-12 | 惠州宇新化工有限责任公司 | A kind of raw air preprocess method |
| CN110357189A (en) * | 2019-07-19 | 2019-10-22 | 范县金海德科贸有限公司 | The pollutant treatment technique of hydrocarbon oxygen compound |
| CN211562888U (en) * | 2019-12-30 | 2020-09-25 | 宁夏荆洪生物科技有限公司 | Acrolein tail gas treatment system |
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