CN106587061B - Dropped a hint using decarburization the system of purifying carbon dioxide - Google Patents
Dropped a hint using decarburization the system of purifying carbon dioxide Download PDFInfo
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- CN106587061B CN106587061B CN201710018702.6A CN201710018702A CN106587061B CN 106587061 B CN106587061 B CN 106587061B CN 201710018702 A CN201710018702 A CN 201710018702A CN 106587061 B CN106587061 B CN 106587061B
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- 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
- B01D53/04—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 stationary adsorbents
- B01D53/047—Pressure swing adsorption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D1/00—Devices using naturally cold air or cold water
- F25D1/02—Devices using naturally cold air or cold water using naturally cold water, e.g. household tap water
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Abstract
A kind of system for purifying carbon dioxide of being dropped a hint using decarburization,Including the unstripped gas air admission unit being sequentially connected,Thick desulfurization unit,Psa unit,Product gas output unit,Bosh,The unstripped gas air admission unit includes the first surge tank,Ventilating fan unit,First washing cooling tower,Relay air blower unit,Second washing cooling tower,Psa unit includes four adsorption towers,The material circulation duct connected with inside adsorption tower is respectively provided with the bottom of towe of each adsorption tower,Absorption bus dump is also set in the bottom of psa unit,Inverse put bus dump and negative pressure bus dump,The present invention to unstripped gas by carrying out desulfurization,Pressure-variable adsorption,Realize the purification of carbon dioxide,Reach 96% from the purity of the product air carbon dioxide of the system output,Not only decarburization is dropped a hint cycling and reutilization,Reduce emptying pollution,And continue to purify for postorder,Cooling prepares food-grade liquid carbon dioxide and laid a good foundation.
Description
Technical field
The present invention relates to carbon dioxide purification technical field, more particularly to a kind of dropped a hint purifying carbon dioxide using decarburization
System.
Background technology
During Ammonia Production, it will be discharged in decarbonization process containing the mixed gas that carbon dioxide ratio is 86%,
This not only causes the waste of raw material, does not meet the theory of company and national cycling and reutilization, and discharges for a long time to air
Cause pollution.
The content of the invention
It is necessary to propose that a kind of mixed gas of pairing ammonification decarbonization process discharge is recycled and then is made pure
The system of the purifying carbon dioxide of being dropped a hint using decarburization of the higher carbon dioxide of degree.
A kind of system for purifying carbon dioxide of being dropped a hint using decarburization, including the unstripped gas air admission unit, thick being sequentially connected
Desulfurization unit, psa unit, product gas output unit, bosh, the unstripped gas air admission unit include the first buffering
Tank, ventilating fan unit, the first washing cooling tower, relay air blower unit, the second washing cooling tower, in first surge tank
Top opens up the unstripped gas air inlet dropped a hint for being sent into decarburization, and unstripped gas outlet is opened up in the bottom of the first surge tank,
The bottom of first surge tank opens up condensation flow outlet, the air inlet that the unstripped gas outlet passes through pipeline and ventilating fan unit
Connection, the air outlet of ventilating fan unit are connected with the gas phase entrance of the first washing cooling tower, the tower top of the first washing cooling tower
Gaseous phase outlet is connected with the air inlet of relay air blower unit, the air outlet of relay air blower unit and the second washing cooling tower
Gas phase entrance is connected, and the top gaseous phase outlet of the second washing cooling tower is connected with the bottom of towe feeding mouth of the thick desulfurization unit, institute
Stating thick desulfurization unit includes the first desulfurizing tower and the second desulfurizing tower, the bottom of towe feeding mouth and the second desulfurizing tower of first desulfurizing tower
Bottom of towe feeding mouth export and connect with the top gaseous phase of the second washing cooling tower, the tower top discharging opening of the first desulfurizing tower and second
The tower top discharging opening of desulfurizing tower is connected with the bottom of towe feeding mouth of psa unit, and psa unit includes four absorption
Tower, the material circulation duct connected with inside adsorption tower is respectively provided with the bottom of towe of each adsorption tower, also in psa unit
Bottom absorption bus dump, inverse put bus dump and negative pressure bus dump, the absorption bus dump and each thing are set
Stream is connected between threading a pipe by adsorbing sequencing valve, between the input of inverse put bus dump and each material circulation duct
Connected by inverse put sequencing valve, it is program control by vacuumizing between the input of negative pressure bus dump and each material circulation duct
Valve is connected, and the output end of the inverse put bus dump and the output end of negative pressure bus dump are connected with product gas output unit,
Exhaust emission tube line is respectively provided with the tower top of each adsorption tower, also sets waste gas to conflux pipeline at the top of psa unit
The pipeline that confluxes is pressed, the waste gas confluxes to be connected between pipeline and exhaust emission tube line by waste gas sequencing valve, described to press
Conflux by pressing sequencing valve to connect between pipeline and exhaust emission tube line, the product gas output unit includes the second buffering
Tank, output blower fan unit, the 3rd washing cooling tower, the output end and the air inlet of output blower fan unit of the inverse put bus dump
Connection, the output end of negative pressure bus dump is simultaneously with exporting the air inlet of blower fan unit and the gas phase entrance company of the second surge tank
Connect, the gaseous phase outlet at the top of the second surge tank is connected with inverse put bus dump, the setting condensed water outflow of the second buffering pot bottom
Mouthful, the air outlet of the output blower fan unit connects the gas phase entrance of the 3rd washing cooling tower, the tower top of the 3rd washing cooling tower
Product gas outlet is set, the bottom of the 3rd washing cooling tower sets condensation flow to export, the bosh include storage tank and with
The outlet conduit and water return pipeline of storage tank connection, one end of the outlet conduit are connected with storage tank, the other end point of outlet conduit
Liquid phase entrance, the liquid phase entrance of the second washing cooling tower not with the first washing cooling tower, the liquid phase of the 3rd washing cooling tower enter
Mouth connection, one end of the water return pipeline are connected with storage tank, and the other end of water return pipeline is cold with the first washing cooling tower respectively
Condensate flow export, the condensation flow outlet of the second washing cooling tower, the condensation flow outlet connection of the 3rd washing cooling tower, are going out
Circulating pump is set on waterpipe.
Preferably, the first washing cooling tower, the second washing cooling tower, the 3rd washing cooling tower have identical knot
Structure, gaseous phase outlet is set in the tower top of the first washing cooling tower, in the upper setting liquid phase entrance of the side wall of the first washing cooling tower,
It is followed successively by top slack tank area, foam removal area, middle part slack tank area, contact zone, bottom from the top down in the inside of the first washing cooling tower
Slack tank area, wire mesh demister is filled in foam removal area, to remove mist, ripple packing is filled in contact zone, to increase gas-liquid
The gaseous phase outlet connection of the surface area of contact, the top slack tank area and tower top, bottom slack tank area connect with condensation flow outlet,
The liquid phase entrance is opened in the side wall in the middle part slack tank area, and an annular water is fixedly installed in the slack tank area of middle part
Pipe, the annular water pipe are connected with the liquid phase entrance, and some umbrella shape sprays are also uniformly arranged in the side wall of annular water pipe
Head, some umbrella shape shower nozzles connect with annular water pipe, uniformly to be sprayed cooling water by annular water pipe and umbrella shape shower nozzle
Leaching is on ripple packing.
Preferably, check-valves also is set on the inverse put bus dump of the second surge tank front end.
Preferably, inlet valve is set at the bottom of towe feeding mouth of first desulfurizing tower, gone out in the tower top of the first desulfurizing tower
Outlet valve is set at material mouth, inlet valve is set at the bottom of towe feeding mouth of second desulfurizing tower, in the tower top of the second desulfurizing tower
Discharge outlet sets outlet valve, is also set between the bottom of towe feeding mouth of the first desulfurizing tower and the tower top discharging opening of the second desulfurizing tower
First series connection pipeline, sets second to connect between the bottom of towe feeding mouth of the second desulfurizing tower and the tower top discharging opening of the first desulfurizing tower
Pipeline, the first desulfurization sequencing valve is set on the described first series connection pipeline, sets the second desulfurization program control on the second series connection pipeline
Valve, so it is de- by the inlet valve of the first desulfurizing tower of control, outlet valve, the inlet valve of the second desulfurizing tower, outlet valve and first
Sulphur sequencing valve, the second desulfurization sequencing valve, realize the first desulfurizing tower and the second desulfurizing tower series, parallel or individually at the same work.
Preferably, wire mesh demister is set in the raw material gas outlet of first surge tank, to remove mist, and then subtracted
The moisture entered less in adsorption tower.
The present invention realizes the purification of carbon dioxide, exported from the system by carrying out desulfurization, pressure-variable adsorption to unstripped gas
The purity of product air carbon dioxide reach 96%, not only decarburization is dropped a hint cycling and reutilization, reduces emptying pollution, and
For postorder continue to purify, cool down prepare food-grade liquid carbon dioxide lay a good foundation.
Brief description of the drawings
Fig. 1 is the connection diagram of the present invention.
Fig. 2 is the internal structure schematic diagram of the first washing cooling tower.
Fig. 3 is the annular water pipe of the first washing cooling tower and the schematic diagram of umbrella shape shower nozzle.
Fig. 4 is the internal structure schematic diagram of first surge tank.
Fig. 5 is the enlarged diagram of the thick desulfurization unit.
In figure：Unstripped gas air admission unit 10, the first surge tank 11, wire mesh demister 111, ventilating fan unit 12, first
Washing cooling tower 13, top slack tank area 131, foam removal area 132, wire mesh demister 1321, middle part slack tank area 133, annular water pipe
1331st, umbrella shape shower nozzle 1332, contact zone 134, ripple packing 1341, bottom slack tank area 135, relay air blower unit 14, the second water
Wash cooling tower 15, thick desulfurization unit 20, the first desulfurizing tower 21, inlet valve 211, outlet valve 212, the second desulfurizing tower 22, inlet valve
221st, outlet valve 222, the first desulfurization sequencing valve 23, the second desulfurization sequencing valve 24, psa unit 30, adsorption tower 31, material
Circulation duct 32, absorption bus dump 33, absorption sequencing valve 331, inverse put bus dump 34, inverse put sequencing valve 341, check-valves
342nd, negative pressure bus dump 35, vacuumize sequencing valve 351, exhaust emission tube line 36, waste gas and conflux pipeline 37, waste gas sequencing valve
371st, press the pipeline 38 that confluxes, press sequencing valve 381, product gas output unit 40, the second surge tank 41, output blower fan unit
42nd, the 3rd washing cooling tower 43, bosh 50, storage tank 51, outlet conduit 52, water return pipeline 53, circulating pump 54.
Embodiment
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, common for this area
For technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Referring to Fig. 1 to Fig. 4, the embodiments of the invention provide a kind of system for purifying carbon dioxide of being dropped a hint using decarburization,
Including be sequentially connected unstripped gas air admission unit 10, thick desulfurization unit 20, psa unit 30, product gas output unit 40,
Bosh 50.
Unstripped gas air admission unit 10 includes the first surge tank 11, ventilating fan unit 12, the first washing cooling tower 13, relay
Blower fan unit 14, the second washing cooling tower 15, the raw material dropped a hint for being sent into decarburization is opened up on the top of the first surge tank 11
Gas air inlet, unstripped gas outlet is opened up in the bottom of the first surge tank 11, condensation flow is opened up in the bottom of the first surge tank 11
Outlet, unstripped gas outlet be connected by pipeline with the air inlet of ventilating fan unit 12, the air outlet of ventilating fan unit 12 and
The gas phase entrance connection of first washing cooling tower 13, top gaseous phase outlet and the relay air blower unit 14 of the first washing cooling tower 13
Air inlet connection, the air outlet of relay air blower unit 14 is connected with the gas phase entrance of the second washing cooling tower 15, and second washes
The top gaseous phase outlet of cooling tower 15 is connected with the bottom of towe feeding mouth of thick desulfurization unit 20.
Thick desulfurization unit 20 includes the first desulfurizing tower 21 and the second desulfurizing tower 22, the bottom of towe feeding mouth of the first desulfurizing tower 21 with
The bottom of towe feeding mouth of second desulfurizing tower 22 is exported with the top gaseous phase of the second washing cooling tower 15 and connected, the first desulfurizing tower 21
Bottom of towe feeding mouth of the tower top discharging opening of tower top discharging opening and the second desulfurizing tower 22 with psa unit 30 is connected.
Psa unit 30 includes four adsorption towers 31, is respectively provided with and adsorption tower 41 in the bottom of towe of each adsorption tower 41
The material circulation duct 32 of inside connection, also absorption bus dump 33, inverse put is set to conflux in the bottom of psa unit 30
Pipeline 34 and negative pressure bus dump 35, adsorb between bus dump 33 and each material circulation duct 32 by adsorbing sequencing valve
331 connections, are connected between the input of inverse put bus dump 34 and each material circulation duct 32 by inverse put sequencing valve 341
Connect, connected between the input of negative pressure bus dump 35 and each material circulation duct 32 by vacuumizing sequencing valve 351, it is inverse
Put the output end of bus dump 34 and the output end of negative pressure bus dump 35 is connected with product gas output unit 40, at each
The tower top of adsorption tower 31 is respectively provided with exhaust emission tube line 36, also sets waste gas to conflux pipeline 37 at the top of psa unit 30
The pipeline 38 that confluxes is pressed, waste gas confluxes to be connected between pipeline 37 and exhaust emission tube line 36 by waste gas sequencing valve 371, is pressed
Conflux between pipeline 38 and exhaust emission tube line 36 by pressing sequencing valve 381 to connect.
Product gas output unit 40 includes the second surge tank 41, output blower fan unit 42, the 3rd washing cooling tower 43, inverse put
The output end of bus dump 34 be connected with exporting the air inlet of blower fan unit 42, the output end of negative pressure bus dump 35 and meanwhile with it is defeated
The gas phase entrance of the air inlet of blowing machine unit 42 and the second surge tank 41 connects, the gaseous phase outlet at the top of the second surge tank 41 with
Inverse put bus dump 34 connects, the setting condensation flow outlet of the bottom of the second surge tank 41, the air outlet of output blower fan unit 42
The gas phase entrance of the 3rd washing cooling tower 43 is connected, the tower top of the 3rd washing cooling tower 43 sets product gas outlet, the 3rd washing
The bottom of cooling tower 43 sets condensation flow to export.
Bosh 50 includes storage tank 51 and the outlet conduit 52 and water return pipeline 53 that are connected with storage tank 51, outlet conduit 52
One end be connected with storage tank 51, the other end of outlet conduit 52 the liquid phase entrance with the first washing cooling tower 13, the second water respectively
Wash the liquid phase entrance connection of the liquid phase entrance, the 3rd washing cooling tower 43 of cooling tower 15, one end and the storage tank 51 of water return pipeline 53
Connection, the other end of water return pipeline 53 the condensation flow outlet with the first washing cooling tower 13, the second washing cooling tower 15 respectively
Condensation flow outlet, the 3rd washing cooling tower 43 condensation flow outlet connection, on outlet conduit 52 set circulating pump 54.
Emptying gas from synthesis ammonia decarbonization process are delivered to the first washing cooling tower 13 by ventilating fan unit 12
It is interior, because the flowmeter tolerance that the gas of decarbonization process is discharged is unstable, so first unstripped gas is sent into the first surge tank 11
Voltage stabilizing buffers, then is suppressed by ventilating fan unit 12 to 10KPa, and is delivered in the first washing cooling tower 13, and pressure-variable adsorption
Because the required pressure of absorption of the adsorbent to carbon dioxide is 40KPa in unit 30, if using ventilating fan unit
12 directly suppress unstripped gas to 40KPa, the problem of pressure differential is larger, blower fan unit power consumption is larger be present, and synthesize ammonia and take off
Carbon process to the system distance also farther out, pressure loss is very serious.
So need setting relay air blower unit 14 close to the position of the system, by relay air blower unit 14 to gas
Conveying pressurization is carried out, the pressure of gas is reached 40KPa, meets the requirement of the pressure-variable adsorption of adsorption tower, in this way, ventilating fan machine
Group 12 primarily serves the effect that enough gas tolerance is conveyed for postorder, and relay air blower unit 14 is played and conveyed for adsorption tower
Air pressure meets the effect of the gas of technological requirement.For example, in one embodiment, two 55KW's of the selection of ventilating fan unit 12
Lodz blower fan, Lodz blower fan of the relay air blower unit 14 from three 75KW.
The first washing cooling tower 13 is provided with the air opening end of relay air blower unit 14, and in ventilating fan unit 12
Air opening end is provided with the second washing cooling tower 15, and then to due to pressurization, to air work, caused heat cools,
So that it is satisfied by technological requirement into other pressure, the temperature in adsorption tower.
Buffer gas is played a part of in the setting of second surge tank 41, when output blower fan unit 42 passes through negative pressure bus dump
When 35 pairs of adsorption towers carry out negative-pressure ward, output blower fan unit 42 can also carry out negative pressure by the second surge tank 41 to adsorption tower
Suction, while the pressure of negative-pressure ward is strengthened, play a part of gas voltage stabilizing buffering in surge tank so that during negative-pressure ward
Steady air current.
The system carries out absorption purification, the pressure-swing absorption process bag of adsorption tower to carbon dioxide using the principle of pressure-variable adsorption
Include absorption, pressure, inverse put, the step of vacuumizing, four adsorption towers in the system are respectively the first adsorption tower, the from left to right
Two adsorption towers, the 3rd adsorption tower, the 4th adsorption tower.
The process for illustrating pressure-variable adsorption exemplified by a circulation absorption process of the first adsorption tower, the first adsorption tower are chosen below
Absorption sequencing valve 331 open, now mixed gas enters inside from the material circulation duct 32 of the first adsorption tower, starts to inhale
Attached, when tower pressure interior force is more than 40KPa, the waste gas sequencing valve 371 of the first adsorption tower is opened, after the completion of absorption, the first adsorption tower
Absorption sequencing valve 331 close, the waste gas sequencing valve 371 of the first adsorption tower is closed, the He of pressure sequencing valve 381 of the first adsorption tower
The pressure sequencing valve 381 of second adsorption tower is opened, and now the second adsorption tower is to vacuumize the state finished, the first adsorption tower and
Realize between two adsorption towers and press, after the completion of pressing, the pressure journey for pressing the adsorption tower of sequencing valve 381 and second of the first adsorption tower
Control valve 381 is closed, and the inverse put sequencing valve 341 of the first adsorption tower is opened, and inverse put gas enters the 3rd along inverse put bus dump 34
Washing cooling tower 43, and then discharged as product gas, after the completion of inverse put, the inverse put sequencing valve 341 of the first adsorption tower is closed, and first
The sequencing valve 351 that vacuumizes of adsorption tower is opened, and output blower fan unit 42 is by the gas in the first adsorption tower along negative pressure collecting pipe
The surge tank 41 of road 35 and second is drawn to the 3rd washing cooling tower 43, and then is discharged as product gas.So complete the first suction
The absorption of attached tower and the regeneration of adsorbent.
Further, the first washing cooling tower 13, the second washing cooling tower 15, the 3rd washing cooling tower 43 have identical knot
Structure, gaseous phase outlet is set in the tower top of the first washing cooling tower 13, in the upper setting liquid phase of the side wall of the first washing cooling tower 13
Entrance, it is followed successively by top slack tank area 131, foam removal area 132, middle part slack tank area from the top down in the inside of the first washing cooling tower 13
133rd, the inside of contact zone 134, bottom slack tank area 135, the second washing cooling tower 15 and the 3rd washing cooling tower 43 is from the top down
Also top slack tank area 131, foam removal area 132, middle part slack tank area 133, contact zone 134, bottom slack tank area 135 are followed successively by, in foam removal
Filling wire mesh demister 1321 in area 132, to remove mist, the filling ripple packing 1341 in contact zone 134, to increase gas-liquid
The surface area of contact, top slack tank area 131 are connected with the gaseous phase outlet of tower top, and bottom slack tank area 135 connects with condensation flow outlet
Connect, liquid phase entrance is opened in the side wall in middle part slack tank area 133, a piece annular water of fixed setting in middle part slack tank area 133
Pipe 1331, annular water pipe 1331 are connected with liquid phase entrance, and some umbrellas are also uniformly arranged in the side wall of annular water pipe 1331
Shape shower nozzle 1332, some umbrella shape shower nozzles 1332 connect with annular water pipe 1331, to be sprayed by annular water pipe 1331 and umbrella shape
First 1332 uniformly spray cooling water on ripple packing 1341.
Certainly, in the 3rd washing cooling tower 43, top slack tank area 131 is connected with the product gas outlet of tower top.
Further, check-valves 342 is set also on the inverse put bus dump 34 of the front end of the second surge tank 41.When inverse put process
After the completion of, inverse put sequencing valve 341 is closed, and is vacuumized sequencing valve 351 and is opened, due to adsorption tower during the two Vavle switchings
Interior pressure is less than the pressure in inverse put bus dump 34, so gas can be back in adsorption tower in inverse put bus dump 34,
In order to avoid the generation of this gas backflow, there is provided check-valves 342, check-valves 342 is unidirectional automatic valve, before check-valves 342
When the air pressure at end is more than the air pressure of rear end, check-valves 342 is opened, when the air pressure of the rear end of check-valves 342 is more than the air pressure of front end,
Check-valves 342 closes, and then avoids gas backstreaming.
Referring to Fig. 5, further, inlet valve is set at the bottom of towe feeding mouth of the first desulfurizing tower 21, in the first desulfurizing tower 21
Tower top discharge outlet set outlet valve, at the bottom of towe feeding mouth of the second desulfurizing tower 22 set inlet valve, in the second desulfurizing tower
22 tower top discharge outlet sets outlet valve, also goes out in the tower top of the bottom of towe feeding mouth and the second desulfurizing tower 22 of the first desulfurizing tower 21
First series connection pipeline is set between material mouth, in the bottom of towe feeding mouth of the second desulfurizing tower 22 and the tower top discharging opening of the first desulfurizing tower 21
Between set second series connection pipeline, first series connection pipeline on the first desulfurization sequencing valve 23 is set, second series connection pipeline on set
The second desulfurization sequencing valve 24 is put, and then by controlling the inlet valve 211 of the first desulfurizing tower 21, outlet valve 212, the second desulfurizing tower 22 to enter
Expect valve 221, the desulfurization sequencing valve 23 of outlet valve 222 and first, the second desulfurization sequencing valve 24, realize the first desulfurizing tower 21 and the
The series, parallel of two desulfurizing towers 22 individually works simultaneously.
When needing the first desulfurizing tower 21 and the second desulfurizing tower 22 to work independently, opening the first desulfurizing tower 21 inlet valve 211,
Outlet valve 212, the inlet valve 221 of the second desulfurizing tower 22, outlet valve 222 are closed, then the first desulfurizing tower 21 works, the second desulfurizing tower 22
Do not work；The inlet valve 221 of the second desulfurizing tower 22, outlet valve 222 are opened, closes the inlet valve 211 of the first desulfurizing tower 21, outlet valve
212, then the second desulfurizing tower 22 work, the first desulfurizing tower 21 does not work.
When needing the first desulfurizing tower 21 and the second desulfurizing tower 22 works simultaneously, i.e. parallel operation opens the first desulfurizing tower
21 inlet valves 211, outlet valve 212, open the inlet valve 221 of the second desulfurizing tower 22, outlet valve 222.
When needing the first desulfurizing tower 21 and the second 22 tandem working of desulfurizing tower, the inlet valve of the first desulfurizing tower 21 is opened
211, the outlet valve 212 of the first desulfurizing tower 21 is closed, opens the outlet valve 222 of the second desulfurizing tower 22, closes the second desulfurizing tower 22
Inlet valve 221, open the second desulfurization sequencing valve 24, close the first desulfurization sequencing valve 23, in this way, from the bottom of towe of the first desulfurizing tower 21
The gas that inlet valve enters passes through the tower of the first desulfurizing tower 21, second series connection pipeline, the second desulfurizing tower 22 and the second desulfurizing tower 22
Top gaseous phase outlet is desulfurized, and this process is to first pass through the first desulfurizing tower 21, then by the second desulfurizing tower 22；
Conversely, opening the inlet valve 221 of the second desulfurizing tower 22, the outlet valve 222 of the second desulfurizing tower 22 is closed, opens first
The outlet valve 212 of desulfurizing tower 21, the inlet valve 211 of the first desulfurizing tower 21 is closed, open the first desulfurization sequencing valve 23, close second
Desulfurization sequencing valve 24, in this way, being connected from the gas that the bottom of towe inlet valve of the second desulfurizing tower 22 enters by the second desulfurizing tower 22, first
The top gaseous phase outlet of pipeline, the first desulfurizing tower 21 and the first desulfurizing tower 21 is desulfurized, and this process is to first pass through the second desulfurizing tower
22, then by the first desulfurizing tower 21.
The size of tolerance and the requirement of desulfurization of desulfurization are needed to adjust the first desulfurizing tower 21 when so can be according to production
With the working condition of the second desulfurizing tower 22.
Further, wire mesh demister 111 is set in the raw material gas outlet of the first surge tank 11, to remove mist, and then
Reduce the moisture entered in adsorption tower.
Module or unit in device of the embodiment of the present invention can be combined, divided and deleted according to actual needs.
Above disclosure is only preferred embodiment of present invention, can not limit the right model of the present invention with this certainly
Enclose, one of ordinary skill in the art will appreciate that all or part of flow of above-described embodiment is realized, and will according to right of the present invention
Made equivalent variations are sought, still falls within and invents covered scope.
Claims (5)
- A kind of 1. system for purifying carbon dioxide of being dropped a hint using decarburization, it is characterised in that：Unstripped gas including being sequentially connected enters Gas unit, thick desulfurization unit, psa unit, product gas output unit and bosh, the unstripped gas air admission unit bag The first surge tank, ventilating fan unit, the first washing cooling tower, relay air blower unit and the second washing cooling tower are included, described The top of first surge tank opens up the unstripped gas air inlet dropped a hint for being sent into decarburization, and original is opened up in the bottom of the first surge tank Expect gas outlet, condensation flow outlet is opened up in the bottom of the first surge tank, the unstripped gas outlet passes through pipeline and ventilating fan The air inlet connection of unit, the air outlet of ventilating fan unit are connected with the gas phase entrance of the first washing cooling tower, the first washing The top gaseous phase outlet of cooling tower is connected with the air inlet of relay air blower unit, the air outlet of relay air blower unit and described second The gas phase entrance connection of washing cooling tower, the top gaseous phase outlet of the second washing cooling tower and the bottom of towe of the thick desulfurization unit enter Material mouth connects, and the thick desulfurization unit includes the first desulfurizing tower and the second desulfurizing tower, the bottom of towe feeding mouth of first desulfurizing tower Export and connect with the top gaseous phase of the second washing cooling tower with the bottom of towe feeding mouth of the second desulfurizing tower, the tower top of the first desulfurizing tower Bottom of towe feeding mouth of the tower top discharging opening of discharging opening and the second desulfurizing tower with psa unit is connected, psa unit bag Four adsorption towers are included, the material circulation duct connected with inside adsorption tower is respectively provided with the bottom of towe of each adsorption tower, is also being become Press the bottom of absorbing unit that absorption bus dump, inverse put bus dump and negative pressure bus dump, the absorption bus dump are set It is connected between each material circulation duct by adsorbing sequencing valve, the input of inverse put bus dump and each material flow Connected by inverse put sequencing valve between threading a pipe, passed through between the input of negative pressure bus dump and each material circulation duct Sequencing valve connection is vacuumized, the output end of the inverse put bus dump and the output end of negative pressure bus dump export with product gas Unit is connected, and exhaust emission tube line is respectively provided with the tower top of each adsorption tower, is also set at the top of psa unit useless Gas confluxes pipeline and pressure is confluxed pipeline, and the waste gas confluxes and connected between pipeline and exhaust emission tube line by waste gas sequencing valve Connect, the pressure is confluxed by pressing sequencing valve to connect between pipeline and exhaust emission tube line, the product gas output unit bag Include the second surge tank, output blower fan unit and the 3rd washing cooling tower, output end and the output blower fan of the inverse put bus dump The air inlet connection of unit, the output end of negative pressure bus dump is simultaneously with exporting the air inlet and the second surge tank of blower fan unit Gas phase entrance is connected, and the gaseous phase outlet at the top of the second surge tank is connected with inverse put bus dump, the setting of the second buffering pot bottom Condensation flow exports, and the air outlet of the output blower fan unit connects the gas phase entrance of the 3rd washing cooling tower, and the 3rd washing is cold But the tower top of tower sets product gas outlet, and the bottom of the 3rd washing cooling tower sets condensation flow to export, the bosh bag The outlet conduit and water return pipeline for including storage tank and being connected with storage tank, one end of the outlet conduit are connected with storage tank, outlet conduit The other end liquid phase entrance with the first washing cooling tower, the liquid phase entrance of the second washing cooling tower, the 3rd washing cooling respectively The liquid phase entrance connection of tower, one end of the water return pipeline are connected with storage tank, and the other end of water return pipeline is washed with first respectively The condensation flow outlet of cooling tower, the condensation flow outlet of the second washing cooling tower, the condensed water outflow of the 3rd washing cooling tower Mouth connection, sets circulating pump on outlet conduit.
- 2. the system for purifying carbon dioxide of being dropped a hint as claimed in claim 1 using decarburization, it is characterised in that：First water Washing cooling tower, the second washing cooling tower, the 3rd washing cooling tower has identical structure, is set in the tower top of the first washing cooling tower Gaseous phase outlet is put, in the upper setting liquid phase entrance of the side wall of the first washing cooling tower, in the inside of the first washing cooling tower from upper Top slack tank area, foam removal area, middle part slack tank area, contact zone, bottom slack tank area are followed successively by downwards, silk screen is filled in foam removal area and is removed Foam device, to remove mist, ripple packing is filled in contact zone, to increase the surface area of gas-liquid contact, the top slack tank area It is connected with the gaseous phase outlet of tower top, bottom slack tank area connects with condensation flow outlet, and the liquid phase entrance is opened in the middle part In the side wall in slack tank area, an annular water pipe, the annular water pipe and the liquid phase are fixedly installed in the slack tank area of middle part Entrance is connected, and some umbrella shape shower nozzles, some umbrella shape shower nozzles and annular are also uniformly arranged in the side wall of annular water pipe Water pipe connects, uniformly to be sprayed cooling water on ripple packing by annular water pipe and umbrella shape shower nozzle.
- 3. the system for purifying carbon dioxide of being dropped a hint as claimed in claim 2 using decarburization, it is characterised in that：It is also slow second Rush on the inverse put bus dump of tank front end and check-valves is set.
- 4. the system for purifying carbon dioxide of being dropped a hint as claimed in claim 3 using decarburization, it is characterised in that：Described first Inlet valve is set at the bottom of towe feeding mouth of desulfurizing tower, outlet valve is set in the tower top discharge outlet of the first desulfurizing tower, described the Inlet valve is set at the bottom of towe feeding mouth of two desulfurizing towers, outlet valve is set in the tower top discharge outlet of the second desulfurizing tower, also the First is set to connect pipeline between the bottom of towe feeding mouth of one desulfurizing tower and the tower top discharging opening of the second desulfurizing tower, in the second desulfurizing tower Bottom of towe feeding mouth and the tower top discharging opening of the first desulfurizing tower between set second connect pipeline, connected described first on pipeline First desulfurization sequencing valve is set, the second desulfurization sequencing valve is set on the second series connection pipeline, and then by controlling the first desulfurizing tower Inlet valve, outlet valve, the inlet valve of the second desulfurizing tower, outlet valve and the first desulfurization sequencing valve, the second desulfurization sequencing valve, Realize the first desulfurizing tower and the second desulfurizing tower series, parallel or individually at the same work.
- 5. the system for purifying carbon dioxide of being dropped a hint as claimed in claim 4 using decarburization, it is characterised in that：Described first The raw material gas outlet of surge tank sets wire mesh demister, to remove mist, and then reduces the moisture entered in adsorption tower.
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| CN101254918B (en) * | 2008-03-31 | 2010-12-08 | 大连理工大学 | Device for purifying carbon dioxide by adsorption distillation technology |
| CN102303865B (en) * | 2011-08-15 | 2013-05-15 | 安庆凯美特气体有限公司 | Improved production method of food-grade liquid carbon dioxide product |
| CN102442667B (en) * | 2011-09-30 | 2013-07-31 | 白洪亮 | Catching and refining device of carbon dioxide gas |
| CN203419745U (en) * | 2013-07-18 | 2014-02-05 | 毛亚成 | Carbon dioxide distillation recycling device with double gas cabinets |
| US9452385B1 (en) * | 2015-03-04 | 2016-09-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Hybrid membrane and adsorption-based system and process for recovering CO2 from flue gas and using combustion air for adsorbent regeneration |
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