CN117547903A - Organic solvent separation recovery unit in dry-type vacuum pump tail gas - Google Patents
Organic solvent separation recovery unit in dry-type vacuum pump tail gas Download PDFInfo
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- CN117547903A CN117547903A CN202410035040.3A CN202410035040A CN117547903A CN 117547903 A CN117547903 A CN 117547903A CN 202410035040 A CN202410035040 A CN 202410035040A CN 117547903 A CN117547903 A CN 117547903A
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- organic solvent
- tail gas
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- adsorption
- water
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- 239000003960 organic solvent Substances 0.000 title claims abstract description 58
- 238000000926 separation method Methods 0.000 title claims abstract description 43
- 238000011084 recovery Methods 0.000 title claims abstract description 7
- 238000001179 sorption measurement Methods 0.000 claims abstract description 57
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 239000000428 dust Substances 0.000 claims abstract description 22
- 238000000746 purification Methods 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003795 desorption Methods 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 238000004080 punching Methods 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 238000004064 recycling Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 85
- 238000005406 washing Methods 0.000 claims description 17
- 239000000945 filler Substances 0.000 claims description 16
- 239000000443 aerosol Substances 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 51
- 238000000034 method Methods 0.000 abstract description 12
- 239000002912 waste gas Substances 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 239000007921 spray Substances 0.000 description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 12
- 238000001914 filtration Methods 0.000 description 7
- 239000001569 carbon dioxide Substances 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 238000009298 carbon filtering Methods 0.000 description 5
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- QMMOXUPEWRXHJS-HWKANZROSA-N (e)-pent-2-ene Chemical compound CC\C=C\C QMMOXUPEWRXHJS-HWKANZROSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QMMOXUPEWRXHJS-UHFFFAOYSA-N pentene-2 Natural products CCC=CC QMMOXUPEWRXHJS-UHFFFAOYSA-N 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
-
- 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
- B01D53/002—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 condensation
-
- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/06—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 adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
-
- 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
- B01D53/185—Liquid distributors
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the field of waste gas treatment, and discloses an organic solvent separating and recycling device in tail gas of a dry vacuum pump, which comprises a pretreatment mechanism, wherein the pretreatment mechanism comprises a treatment tank for separating dust and large-particle impurities in the tail gas, an adsorption and desorption mechanism, the adsorption and desorption mechanism comprises an adsorption box for adsorbing and desorbing the organic solvent in the tail gas, the separation mechanism comprises a separation chamber for separating and recycling the desorbed organic solvent, and the purification mechanism comprises a purification tower for secondarily purifying and demisting the waste gas. The invention can improve the purity of the organic solvent desorbed later, and simultaneously, the rotatable active carbon filter layer is arranged in the adsorption box, and the adsorption process of the organic solvent in the tail gas can be completed to the greatest extent by matching with the punching plate and the conical through hole, so that the separation and recovery of the subsequent organic solvent are better satisfied.
Description
Technical Field
The invention relates to the field of waste gas treatment, in particular to a device for separating and recycling organic solvents in tail gas of a dry vacuum pump.
Background
In the normal production process of workshops, the primary liquid injection process, the secondary liquid injection process, the stirring process and the stirring process can be matched with vacuum pump equipment, and the main components of tail gas exhausted by a vacuum pump are as follows: dimethyl carbonate, methyl ethyl carbonate, ethylene carbonate, methane, ethane, ethylene, trans-2 pentene, C6 and a small amount of vacuum pump oil, wherein the tail gas contains a large amount of organic solvent, and the emission into the air not only causes environmental pollution, but also causes harm to human bodies, and in order to avoid the environmental influence caused by the waste gas, the tail gas is usually filtered and purified.
Most of the traditional filtering and purifying methods are to perform filtering firstly and then directly burn by a burning method to convert the organic solvent into carbon dioxide and water, but the method not only can generate some harmful gases with pungent smell to cause secondary pollution, but also can not recycle the organic solvent in tail gas to cause waste.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the device for separating and recovering the organic solvent in the tail gas of the dry vacuum pump, which solves the problems that the traditional method can generate harmful gases with some pungent smell to cause secondary pollution, and the organic solvent in the tail gas can not be recovered to cause waste.
In order to achieve the above purpose, the invention is realized by the following technical scheme: organic solvent separation recovery unit in dry-type vacuum pump tail gas includes: the pretreatment mechanism comprises a treatment tank for separating dust and large-particle impurities in tail gas, and an adsorption and desorption mechanism, wherein the adsorption and desorption mechanism comprises an adsorption box for adsorbing and desorbing organic solvents in the tail gas, and the separation mechanism comprises a separation chamber for separating and recovering the desorbed organic solvents, and the purification mechanism comprises a purification tower for secondarily purifying and demisting waste gas.
Preferably, one side of the bottom of the treatment tank is connected to one side of the adsorption tank through a first air duct, the middle part of one end of the adsorption tank far away from the treatment tank is connected to one side of the middle part of the separation chamber through a second air duct, and one side of the top of the adsorption tank is connected to one side of the bottom of the purification tower through a switch valve.
Preferably, the top of the treatment tank is provided with a first motor, the driving end of the first motor penetrates through the top wall of the treatment tank and is provided with a rodless spiral, the middle part of the treatment tank is provided with a bent pipe, and the tail end of the bent pipe penetrates through the outer wall of the bottom of the treatment tank and is connected with one end of the first air duct.
Preferably, one side of the bottom of the treatment tank, which is far away from the adsorption box, is fixedly connected with an air inlet, a dust blocking net is arranged on the inner wall of the treatment tank, and a dust collecting chamber is arranged at the bottom end of the treatment tank.
Preferably, the inside of adsorption case is connected with the mount through a plurality of bearing connection seats, the mid-mounting of mount has the active carbon filtering layer, steam generator is installed to the rear side of adsorption case, steam generator's output is linked together with the inside of adsorption case through steam conduit.
Preferably, one side of the inside of adsorption case near first air duct fixedly connected with punching plate, the inside of punching plate evenly is equipped with a plurality of taper through-hole, the second motor is installed to the one end upside that the adsorption case is close to the second air duct, the drive end of second motor runs through the outer wall of adsorption case and installs the driving gear, the one end that the mount is close to the second air duct has driven gear through support mounting, the inside end meshing of driving gear and driven gear links to each other.
Preferably, the mid-mounting of separation chamber has three water to drench and communicates each other between the adjacent water drenches jar, oil water separator is installed to the interior bottom of separation chamber, the bottom that water drenches jar all links to each other with oil water separator's input through the back flow, the one end downside that the second air duct was kept away from to the separation chamber is installed circulating pump and circulating pump's input and is passed through the pipeline and link to each other with oil water separator's inside, the interior top that the water pipe and the end extension of aqueduct reach the separation chamber is installed to the output of circulating pump.
Preferably, the atomizer is all installed to the interior top of left side two the water drenches jar and atomizer's input all is linked together with the aqueduct, the right side the combustor is installed to the interior top of water drenches jar, the refrigerator is installed to the upside position department that the interior top of separation chamber is close to the aqueduct, oil water separator's output runs through the bottom outer wall of separation chamber and extends to outside through the fluid-discharge tube.
Preferably, the interior top of purifying column is equipped with waste gas washing layer, be equipped with the washing filler in the waste gas washing layer, the washing filler material is the multiaspect spheroid, the interior top of purifying column is equipped with the aerial fog separating layer, be equipped with aerial fog separating filler in the aerial fog separating layer, aerial fog separating filler material is the metal multiaspect spheroid, the top of purifying column is equipped with the blast pipe.
Working principle: firstly, the tail gas of a vacuum pump is led into a treatment tank by utilizing an air inlet, a first motor is started, the first motor drives a rodless spiral to rotate, the tail gas moves upwards along the rodless spiral, meanwhile, dust, large particle impurities and the like in the tail gas are thrown onto a dust blocking net by utilizing centrifugal force generated during rotation, primary purification and filtration are completed, then the tail gas enters a bending pipe and enters an adsorption box along a first air duct, the tail gas uniformly and quickly enters an active carbon filter layer to carry out filtration and adsorption of an organic solvent by utilizing a punching plate and a conical through hole, a second motor drives a driving gear to rotate, a driven gear and a fixing frame are driven to rotate, so that the active carbon filter layer is driven to rotate, the contact area of the tail gas and the active carbon filter layer is increased, the filtration and adsorption efficiency is improved, a switch valve on the second air duct is closed, and a switch valve on a third air duct is opened, the filtered and adsorbed waste gas enters the purifying tower through the third air duct, the waste gas is fully reacted with the washing filler in the washing layer to finish secondary purification, then the waste gas is effectively separated from the mist generated in the purification process through the action of the gas mist separating filler in the gas mist separating layer, finally clean air is discharged from the exhaust pipe, when the organic solvent in the active carbon filter layer reaches saturation, the switch valve on the second air duct is opened, the switch valve on the third air duct is closed, the steam generator is opened, high-temperature steam is introduced into the adsorption box through the steam duct, desorption steam penetrates through the active carbon filter layer, the adsorbed organic solvent is desorbed and forms high-concentration organic solvent steam, the high-concentration organic solvent steam enters the first water spray tank in the separation chamber along the second air duct, a certain amount of clear water is added into the oil-water separator, the circulating pump leads out the clear water through the water duct, and finally, spraying the clear water through an atomization spray head to enable high-concentration organic solvent steam to fully contact with condensed water, enabling most of the organic solvent in the tail gas to be cooled down, enabling the organic solvent to flow into an oil-water separator through a return pipe together with water, fully standing, enabling the solvent to be light, heavy in upper layer and heavy in water, enabling the organic solvent in the upper layer to be discharged through a liquid discharge pipe, enabling the clear water in the lower layer to enter the next circulation, enabling gas to be subjected to two cooling separation operations in the first water spray tank and the second water spray tank, finally entering the third water spray tank, enabling the redundant solvent to be combusted by a combustor to generate carbon dioxide and water, and finally discharging the carbon dioxide and the water from an outlet.
The invention provides a device for separating and recycling organic solvents in tail gas of a dry vacuum pump. The beneficial effects are as follows:
1. according to the invention, through arranging the pretreatment mechanism, dust, large particle impurities and the like in the tail gas are removed, the purity of the organic solvent desorbed in the follow-up process can be improved, meanwhile, the rotatable active carbon filter layer is arranged in the adsorption box, and the adsorption process of the organic solvent in the tail gas can be completed to the greatest extent by matching with the punching plate and the conical through hole, so that the separation and recovery of the follow-up organic solvent can be better satisfied.
2. The separation mechanism adopts a cooling water spraying mode and is matched with the oil-water separator to finish the separation work of the organic solvent, the structure is simple, the separation effect is good, the maintenance and the management are convenient, meanwhile, the purification tower is arranged to secondarily purify the tail gas after the active filtration, the exhaust purity of the tail gas is improved, the secondary pollution after the tail gas treatment is prevented, and the environment is protected.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic diagram of a pretreatment mechanism according to the present invention;
FIG. 3 is a schematic diagram of an adsorption/desorption mechanism according to the present invention;
FIG. 4 is a schematic view of a separating mechanism according to the present invention;
FIG. 5 is a schematic diagram of the purification mechanism of the present invention.
Wherein, 1, pretreatment mechanism; 101. a treatment tank; 102. an air inlet; 103. a first motor; 104. a rodless spiral; 105. bending the pipe; 106. a dust blocking net; 107. a dust collection chamber; 2. an adsorption and desorption mechanism; 201. an adsorption box; 202. punching a plate; 203. a tapered through hole; 204. a fixing frame; 205. an active carbon filter layer; 206. a second motor; 207. a drive gear; 208. a driven gear; 209. a steam generator; 210. a steam conduit; 3. a separation mechanism; 301. a separation chamber; 302. a water shower; 303. an oil-water separator; 304. a circulation pump; 305. a water conduit; 306. an atomizing nozzle; 307. a refrigerator; 308. a burner; 309. a return pipe; 310. a liquid discharge pipe; 4. a purifying mechanism; 401. a purifying tower; 402. an exhaust gas washing layer; 403. an aerosol separation layer; 404. an exhaust pipe; 5. a first air duct; 6. a second air duct; 7. a third air duct; 8. and (3) switching the valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples:
referring to fig. 1-5, an embodiment of the invention provides a dry vacuum pump tail gas organic solvent separating and recovering device, which comprises a pretreatment mechanism 1, wherein the pretreatment mechanism 1 comprises a treatment tank 101 for separating dust and large particle impurities in the tail gas, an adsorption and desorption mechanism 2, the adsorption and desorption mechanism 2 comprises an adsorption tank 201 for adsorbing and desorbing organic solvents in the tail gas, the separation mechanism 3 comprises a separation chamber 301 for separating and recovering the desorbed organic solvents, a purifying mechanism 4 comprises a purifying tower 401 for secondarily purifying and demisting the waste gas, one side of the bottom of the treatment tank 101 is connected with one side of the adsorption tank 201 through a first air duct 5, one side of one end of the adsorption tank 201, which is far away from the treatment tank 101, is connected with one side of the middle of the separation chamber 301 through a second air duct 6, and one side of the top of the adsorption tank 201 is connected with one side of the bottom of the purifying tower 401 through a switch valve 8.
In this embodiment, referring to fig. 2, a first motor 103 is installed at the top end of the treatment tank 101, a driving end of the first motor 103 penetrates through the top wall of the treatment tank 101 and is provided with a rodless spiral 104, the rodless spiral 104 is only composed of spiral blades, a guide rod is not arranged in the middle of the rodless spiral 104, when the rodless spiral is driven to rotate by the first motor 103, tail gas rises along the surface and dust and large-particle impurities in the tail gas are thrown out through centrifugal force, a bent pipe 105 is arranged in the middle of the treatment tank 101, the tail end of the bent pipe 105 penetrates through the outer wall of the bottom of the treatment tank 101 and is connected with one end of the first air duct 5, the vertical end of the bent pipe 105 is arranged at the middle of the rodless spiral 104, a horizontal section is connected with the first air duct 5, one side, away from the adsorption tank 201, of the bottom of the treatment tank 101 is fixedly connected with an air inlet 102 for guiding tail gas, a dust blocking net 106 is installed on the inner wall of the treatment tank 101, and a dust collecting chamber 107 is arranged at the bottom end of the treatment tank 101 for collecting dust and large-particle impurities.
Specifically, firstly, the tail gas of the vacuum pump is led into the treatment tank 101 by utilizing the air inlet 102, the first motor 103 is started, the first motor 103 drives the rodless screw 104 to rotate, the tail gas moves upwards along the rodless screw 104, meanwhile, dust, large particle impurities and the like in the tail gas are thrown onto the dust blocking net 106 by utilizing centrifugal force generated during rotation, primary purification and filtration are completed, dust on the dust blocking net 106 finally falls into the dust collecting chamber 107 by gravity, and then the tail gas enters the bending pipe 105 and enters the adsorption box 201 along the first air guide pipe 5.
Further, please refer to fig. 1 and combine fig. 3, the inside of adsorption case 201 is connected with mount 204 through a plurality of bearing connection seats, mount 204 can freely rotate in adsorption case 201, mount 204's mid-mounting has active carbon filtering layer 205, for cellular active carbon layer, can filter the organic solvent in the adsorption tail gas, steam generator 209 is installed to the rear side of adsorption case 201, steam generator 209's output is linked together with the inside of adsorption case 201 through steam conduit 210, leading-in high temperature steam to adsorption case 201 through steam generator 209 and steam conduit 210, desorption steam pierces active carbon filtering layer 205, come out the organic solvent desorption of absorption and form high concentration organic solvent steam, make active carbon filtering layer 205 regenerate simultaneously, resume the activity so that adsorb once more, one side fixedly connected with punching plate 202 near first air duct 5 in adsorption case 201, the inside of punching plate 202 evenly is equipped with a plurality of taper hole 203, can make the tail gas evenly quick enter into active carbon filtering layer 205 inside through steam conduit 210, improve adsorption motor efficiency, install the second gear 206 near the second gear 206 is installed to the second gear 206 of adsorption case 201 and drive driven gear 206, thereby the driven gear 207 rotates by the second gear 206, drive end is connected with the drive gear 207, thereby the driven gear 207 rotates, drive end is contacted with the driven gear 207, drive gear 207 is installed near the second gear 206, drive end is contacted with the driven gear 207, thereby, drive end is contacted with the driven gear 207, and the driven gear is rotated, thereby the driven gear is rotated, and is rotated by the gear is rotated, and is rotated.
Further, referring to fig. 4, three water showers 302 are installed in the middle of the separation chamber 301, and the adjacent water showers 302 are mutually communicated, an oil-water separator 303 is installed at the inner bottom of the separation chamber 301, so that water and organic solvent can be separated, recovery is facilitated, the bottom ends of the water showers 302 are connected with the input end of the oil-water separator 303 through return pipes 309, a circulating pump 304 is installed at the lower side of one end of the separation chamber 301 far away from the second air duct 6, the input end of the circulating pump 304 is connected with the inside of the oil-water separator 303 through a pipeline, a water guide pipe 305 is installed at the output end of the circulating pump 304, the tail end of the water guide pipe 305 extends to the inner top of the separation chamber 301, and cooling water is sprayed into the water showers 302 through the water guide pipe 305, so that the organic solvent is cooled down and flows back into the oil-water separator 303 together with the water.
Further, the inner top parts of the two water showering tanks 302 at the left side are respectively provided with an atomizing nozzle 306, the input ends of the atomizing nozzle 306 are respectively communicated with the water guide pipe 305, the contact area between high-concentration organic solvent steam and water can be increased, the inner top part of the water showering tank 302 at the right side is provided with a burner 308 for burning redundant solvent to generate carbon dioxide and water, and finally the carbon dioxide and water are discharged from an outlet, the upper side position of the inner top part of the separation chamber 301, which is close to the water guide pipe 305, is provided with a refrigerator 307 for cooling circulating water, and the output end of the oil-water separator 303 penetrates through the outer wall at the bottom of the separation chamber 301 through a liquid discharge pipe 310 and extends to the outside, so that the carbon dioxide and the water can be discharged and collected conveniently.
Specifically, when the organic solvent in the activated carbon filter layer 205 reaches saturation, at this time, the on-off valve 8 on the second air duct 6 is opened, and the on-off valve 8 on the third air duct 7 is closed, the steam generator 209 is opened, high-temperature steam is introduced into the adsorption box 201 through the steam duct 210, desorption steam penetrates through the activated carbon filter layer 205, the adsorbed organic solvent is desorbed and forms high-concentration organic solvent steam, the high-concentration organic solvent steam enters the first water spray tank 302 in the separation chamber 301 along the second air duct 6, a certain amount of clear water is added into the oil-water separator 303, the clear water is led out through the water guide pipe 305 by the circulating pump 304, the clear water is cooled by the refrigerator 307, and finally, the high-concentration organic solvent steam is sprayed out through the atomizing spray nozzle 306, so that the high-concentration organic solvent condensate is fully contacted with the condensate water, most of the organic solvent in the tail gas is cooled down, and flows into the oil-water separator 303 through the reflux pipe, the high-concentration organic solvent is separated in the lower layer through the reflux pipe, the first water spray tank 302, the upper-water spray tank is discharged through the second air duct 310, the lower-water spray tank is discharged from the first water spray tank is cooled, the first water spray tank is discharged into the second water spray tank 302, the combustion air is discharged from the second water spray tank is cooled, and finally, and the excess water is discharged from the first water spray tank is burnt, and finally, the combustion air is discharged from the first water spray tank 302, and is cooled.
Further, referring to fig. 5, an exhaust gas washing layer 402 is disposed at the inner top of the purifying tower 401, washing filler is disposed in the exhaust gas washing layer 402, the washing filler is made of polyhedral spheres, an aerosol separating layer 403 is disposed at the inner top of the purifying tower 401, aerosol separating filler is disposed in the aerosol separating layer 403, the aerosol separating filler is made of polyhedral spheres, an exhaust pipe 404 is disposed at the top of the purifying tower 401, the exhaust gas is fully reacted with the washing filler in the exhaust gas washing layer 402 to complete secondary purification, and then is effectively separated from mist generated in the purifying process under the action of the aerosol separating filler in the aerosol separating layer 403, so that clean air is finally discharged from the exhaust pipe 404.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. Organic solvent separation recovery unit in dry-type vacuum pump tail gas, its characterized in that includes:
a pretreatment mechanism (1), wherein the pretreatment mechanism (1) comprises a treatment tank (101) for separating dust and large-particle impurities in tail gas;
the adsorption and desorption mechanism (2), wherein the adsorption and desorption mechanism (2) comprises an adsorption box (201) for adsorbing and desorbing the organic solvent in the tail gas;
a separation mechanism (3), wherein the separation mechanism (3) comprises a separation chamber (301) for separating and recovering the organic solvent after the desorption;
a purification mechanism (4), the purification mechanism (4) comprising a purification tower (401) for secondary purification and defogging of the exhaust gas;
the bottom side of treatment jar (101) is connected in one side of adsorption tank (201) through first air duct (5), the one end middle part that treatment jar (101) was kept away from to adsorption tank (201) is connected in the middle part one side of separation chamber (301) through second air duct (6), the top one side of adsorption tank (201) is connected in the bottom one side of purifying column (401) through ooff valve (8).
2. The device for separating and recovering the organic solvent in the tail gas of the dry vacuum pump according to claim 1, wherein a first motor (103) is installed at the top end of the treatment tank (101), a driving end of the first motor (103) penetrates through the top wall of the treatment tank (101) and is provided with a rodless spiral (104), a bent pipe (105) is arranged in the middle of the treatment tank (101), and the tail end of the bent pipe (105) penetrates through the outer wall of the bottom of the treatment tank (101) and is connected with one end of the first air guide pipe (5).
3. The device for separating and recovering the organic solvent in the tail gas of the dry vacuum pump according to claim 2, wherein an air inlet (102) is fixedly connected to one side, far away from the adsorption box (201), of the bottom of the treatment tank (101), a dust blocking net (106) is arranged on the inner wall of the treatment tank (101), and a dust collecting chamber (107) is arranged at the bottom end of the treatment tank (101).
4. The device for separating and recovering the organic solvent in the tail gas of the dry vacuum pump according to claim 1, wherein a fixing frame (204) is connected to the inside of the adsorption box (201) through a plurality of bearing connecting seats, an active carbon filter layer (205) is installed in the middle of the fixing frame (204), a steam generator (209) is installed at the rear side of the adsorption box (201), and the output end of the steam generator (209) is communicated with the inside of the adsorption box (201) through a steam conduit (210).
5. The device for separating and recycling organic solvent in tail gas of dry vacuum pump according to claim 4, wherein one side, close to the first air duct (5), of the interior of the adsorption box (201) is fixedly connected with a punching plate (202), a plurality of conical through holes (203) are uniformly formed in the punching plate (202), a second motor (206) is installed on the upper side of one end, close to the second air duct (6), of the adsorption box (201), a driving end of the second motor (206) penetrates through the outer wall of the adsorption box (201) and is provided with a driving gear (207), one end, close to the second air duct (6), of the fixing frame (204) is provided with a driven gear (208) through a support, and the driving gear (207) is meshed with the inner side end of the driven gear (208).
6. The device for separating and recovering the organic solvent in the tail gas of the dry vacuum pump according to claim 1, wherein three water showers (302) are installed in the middle of the separation chamber (301) and are communicated with each other between the adjacent water showers (302), an oil-water separator (303) is installed at the inner bottom of the separation chamber (301), the bottom ends of the water showers (302) are connected with the input end of the oil-water separator (303) through return pipes (309), a circulating pump (304) is installed at the lower side of one end of the separation chamber (301) away from the second air guide pipe (6), the input end of the circulating pump (304) is connected with the inside of the oil-water separator (303) through a pipeline, a water guide pipe (305) is installed at the output end of the circulating pump (304), and the tail end of the water guide pipe (305) extends to the inner top of the separation chamber (301).
7. The device for separating and recovering organic solvent in tail gas of dry vacuum pump according to claim 6, wherein the inner top parts of the two water showering tanks (302) at left side are respectively provided with an atomizing nozzle (306) and the input ends of the atomizing nozzles (306) are respectively communicated with a water guide pipe (305), the inner top part of the water showering tank (302) at right side is provided with a burner (308), the upper side position of the inner top part of the separating chamber (301) close to the water guide pipe (305) is provided with a refrigerator (307), and the output end of the oil-water separator (303) penetrates through the outer wall of the bottom of the separating chamber (301) through a liquid discharge pipe (310) and extends to the outside.
8. The device for separating and recovering the organic solvent in the tail gas of the dry vacuum pump according to claim 1, wherein an exhaust gas washing layer (402) is arranged at the inner top of the purifying tower (401), washing filler is arranged in the exhaust gas washing layer (402), the washing filler is made of polyhedral spheres, an aerosol separating layer (403) is arranged at the inner top of the purifying tower (401), an aerosol separating filler is arranged in the aerosol separating layer (403), the aerosol separating filler is made of polyhedral spheres, and an exhaust pipe (404) is arranged at the top end of the purifying tower (401).
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