CN107115776A - One kind CO suitable for cement kiln flue gas2The change system continuously trapped - Google Patents

One kind CO suitable for cement kiln flue gas2The change system continuously trapped Download PDF

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Publication number
CN107115776A
CN107115776A CN201710253279.8A CN201710253279A CN107115776A CN 107115776 A CN107115776 A CN 107115776A CN 201710253279 A CN201710253279 A CN 201710253279A CN 107115776 A CN107115776 A CN 107115776A
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China
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flue gas
trapping
gas
circulation
caught
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尹小林
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Changsha Zichen Technology Development Co Ltd
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Changsha Zichen Technology Development Co Ltd
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Priority to CN201710253279.8A priority Critical patent/CN107115776A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/60Simultaneously removing sulfur oxides and nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/64Heavy metals or compounds thereof, e.g. mercury
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/68Halogens or halogen compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/72Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/36Manufacture of hydraulic cements in general
    • C04B7/43Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44Burning; Melting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • F27D2017/007Systems for reclaiming waste heat including regenerators
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02CCAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00Capture or disposal of greenhouse gases
    • Y02C20/30Capture or disposal of greenhouse gases of perfluorocarbons [PFC], hydrofluorocarbons [HFC] or sulfur hexafluoride [SF6]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/151Reduction of greenhouse gas [GHG] emissions, e.g. CO2
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/121Energy efficiency measures, e.g. improving or optimising the production methods
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/18Carbon capture and storage [CCS]

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Treating Waste Gases (AREA)

Abstract

The present invention discloses one kind CO suitable for cement kiln flue gas2The change system continuously trapped, including cave tail's releaser, chimney, flue gas oxidation, purification device, N2/CO2Membrane separation device, cooler, flue gas compressor, CO2Circularly trapping tower, dewatering dryer, CO2Cooler, CO2Compressor, liquefaction CO2Storage tank, cave tail's releaser connects the air inlet of the flue gas oxidation, purification device, the purifying smoke outlet N of flue gas oxidation, purification device2/CO2The air inlet of membrane separation device, N2/CO2The rich N of membrane separation device2Outlet connection chimney, richness CO2Outlet passes sequentially through cooler and the CO is connected with flue gas compressor2Circularly trapping tower, CO2Circularly trapping tower includes CO2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B, and alternating is carried out continuously CO2Trapping and CO2From releasing.The present invention is not only simple in structure, and cost is low, industrially applicable, and realizes the purifying discharge of cement producing line flue gas, is realized the effective emission reduction and the production of low-carbon metaplasia of cement production enterprise, is also achieved the CO of high-efficiency and continuous2Trapping separation.

Description

One kind CO suitable for cement kiln flue gas2The change system continuously trapped
Technical field
The invention belongs to emission-control equipment technical field, and in particular to one kind CO suitable for cement kiln flue gas2Continuously The change system of trapping.
Background technology
One of the problem of climate change has turned into influence human survival and development, and the carbon dioxide of industrial discharge is considered as It is to cause the main cause of climate warming, China is as developing country maximum in the world, the primary energy based on coal With the secondary energy sources structure based on thermal power generation, with increasing rapidly for economic total volume, the CO of primary energy and secondary energy sources2 Discharge, which has, increases the characteristics of fast, total amount is big, and current carbon emission reduction and CCS (the Carbon Capture of reply climate change And Storage, carbon capture with seal up for safekeeping) or CCUS (Carbon Capture, Utilization and Storage, carbon is caught Obtaining, using with sealing up for safekeeping) the fortune economy of the trapping cost with high investment, high of technology becomes the serious hindrance of popularization and application, existing The research of some CCS or CCUS technologies and Demonstration Application are concentrated mainly on and must separated except high concentration CO2Coal chemical industry, synthesis Gas and coal electrical domain, and coal electrical domain concentrate on IGCC (Integrated Gasification Combined Cycle, it is whole Body integrated coal gasification combined cycle system) coal gasification, in the application of integrated gas-steam combined cycle power plant technology.
Due to current maximum CO2Power plant of the point source mainly using coal as raw material is discharged, in CO2Trapping technique field or CCS Technical elements are by CO2Capture technique method and system be referred to as pre-combustion capture, burning in trapping and post-combustion capture.
(1) pre-combustion capture:Mainly using IGCC coal gasifications, integrated gas-steam combined cycle power plant (IGCC) technology as base Plinth, first by coal gasification, obtains CO and H2, then by vapor conversion, CO switchs to CO2, then pass through separation or CO2Capture technique, Respectively obtain the H of high concentration2And CO2, H2Using combustion power generation or the carbon-free energy can be used as to export.Implement CO in IGCC technology2Catch Collection will make energy resource consumption increase by 10~40%, ton CO2Cost is trapped up to 20~50 dollars, wherein CO2The trapping solution renewable sources of energy are accounted for 60%.
(2) trapped in burning:Also known as oxygen-enriched combusting trapping technique, will be contained a large amount of in air first through utilizing space division system Nitrogen remove, obtain the O of high-purity2, then by high concentration O2Combustion system is introduced, beneficial to CO2Further capture and place Reason, or using pure oxygen as combustion adjuvant, while in combustion to being pressurizeed in boiler so that the main component after burning in flue gas For CO2And water, after separation water, the CO of such flue gas middle and high concentration2Gas can directly be compressed seizure.Oxygen-enriched combusting is trapped Technology increases energy resource consumption 20~50%, ton CO in addition to investment is high, operating cost is high2Cost is trapped up to 50~90 dollars.
(3) post-combustion capture:Refer to and CO directly is implemented to the flue gas after power plant combustion2Separation and trapping, capturing device position Downstream is discharged in power-plant flue gas, chemical absorption method, physisorphtion, membrane separation process, chemical chain partition method etc. can be divided into.Due to electricity The CO of factory's discharge2Concentration is low, pressure is small, causes energy consumption and cost excessive, is still not suitable for large-scale promotion.
At present, CO2Trapping is CO2Separation and purification process, realized industrialized method include solvent absorption, inhale Attached method, embrane method and low temperature processing etc., the big multipotency of these methods use clearance-type trapping.Solvent absorption therein includes Chemical absorption method, Physical Absorption method and physical chemistry absorption process, have proven to be current all CO2Technology among absorption process It is most ripe, most widely used, and with being appropriate for extensive CO2Catch the technical scheme of potentiality.But complex process is captured, Investment is big, is also easy to produce secondary pollution and some solvents have toxicity, solvent needs regeneration to consume mass energy, traps cost It is high.Membrane separation technique therein be by each component in mixed gas in film infiltration rate difference and obtain separation side Method, currently used for separation CO2Membrane material mainly have the polymer such as cellulose acetate, polysulfones, makrolon.For large-scale CO2Trapping system, film method also has larger gap in cost and on reliability requirement.Pressure swing adsorption method therein The general principle of (Pressure Swing Adsorption, PSA) is with pressure using adsorbent to the adsorbance of gas with various Change and it is different, the technology has technical process relatively easy, and energy consumption is relatively low, can remove from synthetic-ammonia transformation gas and return Receive CO2.Low-temperature fractionation isolation technics therein is at low temperature to condense out various components in gas according to technique and requirement, Then wherein all kinds of materials are separated one by one according to the difference of evaporating temperature with the way of distillation.This method is suitable for natural gas CO2、H2S contents are higher, and with CO2When carrying out 3 oil recoveries, CO in produced gas2There are the feelings such as larger fluctuation in content and flow Shape, technological equipment investment expense is larger, and energy consumption is higher.
So far, most CO2Trapping technique even implements IGCC coal gasification, combustion still in development Gas-steam combined cycle power generating, CO2Trap power plant with the power plant that trapping technique is not carried out compared with, it is necessary to consume 10%~ 40% energy, CO2The high cost of trapping causes coal-burning power plant, and also difficulty has implementation CO2The positive wish of trapping.And current various countries The CO of CCS or CCUS technologies2Application technology also focuses on the research and application of the liquefaction C0 displacement of reservoir oils, purging, geology and ocean envelope note, And to seal the environmental hazard that note objectively causes not expectable for geology and ocean.
So far, though field of cement production worldwide has the low-carbon emission reduction problem for emphasizing cement production enterprise, not yet See any specific collecting carbonic anhydride, the research of closing and application or practice report.And the actual production capacity of cement of China has exceeded 3500000000 tons, dry-process rotory kiln production line is a plurality of up to 1700.Cement production enterprise is generally acknowledged highly energy-consuming high pollution enterprise, is dioxy Change one of primary discharge source of carbon, not only primary energy (coal) and secondary energy sources (electricity) consumption are big, and have substantial amounts of discarded waste heat And exhaust emissions, pollutant composition is fluctuated in CO mostly in the waste gas of its discharge during fume environment protection qualified discharge212~ 29%th, SO280~200mg/Nm3、NOx100~400mg/Nm3, 10~30mg/Nm of dust3, and containing a small amount of hydrocarbon, Fluorine chlorine compound and heavy metal, manufacture of cement are synthesized because of its kiln gas composition of its process characteristic and property with coal chemical industry The electric flue gas of gas, natural gas, coal or even IGCC gas have significant difference.The CO of manufacture of cement2Discharge can be divided into material carbon hydrochlorate Decompose the CO that the burning with fuel is produced2Direct discharge and production process consumption the generation such as external power it is indirect Discharge.According to China Building Material Scientific Research General Institute to China cement industry CO2Emission analysis, China's cement production process raw material The CO of decomposition, fuel combustion and power consumption2Discharge capacity accounts for 59%, 26%, the 12% of manufacture of cement total release respectively, comprehensive CO2Emission factor is 0.8045t/t, cement industry CO2Emission factor cement produced with the dry method is 0.867t/t.China's cement production capacity exceedes 35 Hundred million tons, thus infer the CO of China's cement industry2Annual emissions are up to 3,000,000,000 tons.It can be seen that, China's cement production enterprise implements CO2Emission reduction is more Urgent and necessity is highlighted, but because still lacking for the specific CO of cement kiln flue gas2The research and development of trapping technique, it is in addition existing There is CO2The capacity limit that the high Cost Problems of trapping technique application can have been born far beyond cement production enterprise, and manufacture of cement Because its kiln gas composition of its process characteristic and fluid properties and coal chemical industry synthesis gas, natural gas, the electric flue gas of coal or even IGCC gas has significant difference, the thin cement industry of (cement price is low) low for this personal value profit, so far there is not yet any cement CO in kiln flue gas2Trapping and the specific research of application technology and practice report.
To promote cement production enterprise energy-saving and emission-reduction, though cement production enterprise policy require to have built waste gas residual heat boiler and generate electricity system System, but wherein more than 300 DEG C can only be typically utilized the characteristics of kiln hood due to existing application and the aqueous medium waste heat boiler of kiln tail Waste gas residual heat, substantial amounts of 80 DEG C~300 DEG C of waste gas residual heat can not utilize and directly empty and cause thermal pollution, meanwhile, also have big The high temperature heat radiation pollution of capital equipment-rotary kiln shell of other high-temperature services radiation waste heat such as manufacture of cement of amount, revolution The high temperature section trunk temperature of kiln is up to 300 DEG C~500 DEG C, and low-temperature zone trunk temperature is also up to 150 DEG C~300 DEG C, the life of these cement The existing waste heat boiler of high-temperature service in production can not be used directly to produce high-temperature high-pressure steam.
In summary, the demand of energy consumption (electricity, coal), reduction environmental contaminants to external world in reduction cement production enterprise production process Discharge is necessary, in the urgent need to for cement production process installation feature, exploitation is a kind of to utilize big in cement production process Measure the discarded waste heat produced, reduce cost, suitable for cement kiln flue gas CO2The technical method and change system of trapping, to realize The energy-saving and emission-reduction problem of manufacture of cement.
The application for a patent for invention of Application No. 201510579908.7 discloses a kind of based on the coal-fired cigarette of embrane method classification trapping CO in gas2Apparatus and method, it is, using " first enrichment, rear trapping " method, CO in desulfurization neat stress to be trapped in two steps2:It is coal-fired Flue gas is net after desulfurizer, enters separating film module by booster fan boosting, by adjusting between booster fan and air-introduced machine Matching relationship ensure separating film module retentate side be in barotropic state;Meanwhile, adjust per-meate side air-introduced machine, it is ensured that seperation film The per-meate side of component keeps required negative pressure state;Under booster fan, air-introduced machine, the collective effect of per-meate side air-introduced machine, The CO that the both sides of film are formed in pressure difference, pressure differential retentate side flue gas2Permeate, realized to CO in flue gas to per-meate side2Separation; Retentate side gas is discharged under air-introduced machine effect by chimney, the small tolerance of per-meate side, high concentration CO2Enriched gas, in per-meate side Air-introduced machine effect is lower to enter depth CO2Capturing device, is further captured.
Although this application is disclosed using separating film module to CO in coal-fired flue-gas2Trapped again after being separated, but should The blast of separating film module both sides must be pressurized and provide blast just by the regulation of booster fan, air-introduced machine and per-meate side air-introduced machine It can realize, it is excessive using the plant energy consumption cost, it should not promote the use of.
The content of the invention
The main object of the present invention is to provide one kind CO suitable for cement kiln flue gas2The change system continuously trapped, purport Solving existing CO2The problem of capturing device is complicated, purifying inadequate, high energy consumption, cost height are difficult to promote.
To achieve the above object, the present invention proposes one kind CO suitable for cement kiln flue gas2The change system continuously trapped, Including cave tail's releaser, chimney, flue gas oxidation, purification device, N2/CO2Membrane separation device, cooler, flue gas compressor, CO2Circulation Trap tower, dewatering dryer, CO2Cooler, CO2Compressor, liquefaction CO2Storage tank;The exhaust outlet connection of the tail exhaust blower is described The air inlet of flue gas oxidation, purification device, the flue gas oxidation, purification device is used to remove the SO in cement kiln flue gas2, NOx, chlorination Thing, fluoride, hydrocarbon, heavy metal and dust pollution thing, the purifying smoke outlet of the flue gas oxidation, purification device The N2/CO2The air inlet of membrane separation device, the N2/CO2The rich N of membrane separation device2Outlet connection chimney, richness CO2Discharge Mouth passes sequentially through cooler and the CO is connected with flue gas compressor2Circularly trapping tower;CO2Circularly trapping tower include structure it is identical and The CO being arranged in parallel2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B, the CO2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B friendships For being carried out continuously CO2Trapping and CO2From releasing, the CO2Circulation, which is caught, releases device A including housing, the gas distribution located at housing bottom and discharge opeing Device and the gas-liquid separation device being from top to bottom located in housing, atomizing sprayer, silk screen capture bed apparatus, cooling/heating Device, the case top is additionally provided with temperature and pressure inductor;The gas distribution is connected the outlet of the flue gas compressor with pumping equipment, For sending into richness CO into housing2Flue gas body, the atomizing sprayer, which is used to be atomized, sprays into CO2Trapping agent, the silk screen capture Bed apparatus includes horizontal silk screen, vertical silk screen and the tilting silk screen on support frame, and the cooling/heating device connects used heat Energy storage equipment, used heat energy storage equipment institute accumulation of heat can be the discarded waste heat that produces in cement production process, the housing A01 tops Portion is provided with richness N2Gas discharge line and CO2Discharge line, the rich N2CO is provided with gas discharge line2Sensor;The rich N2Gas Discharge line connects chimney or N2Storage tank, the CO2Discharge line is sequentially communicated dewatering dryer, CO2Cooler, CO2Compression Machine, liquefaction CO2Storage tank.
Preferably, electric three passes wind is provided between the cave tail's releaser and the flue gas oxidation, purification device, the chimney Valve, the air inlet of the electric three passes air-valve connects the cave tail's releaser, and the first row gas port of the electric three passes air-valve connects Lead to the flue gas oxidation, purification device, the second exhaust port of the electric three passes air-valve connects the chimney.
Preferably, the flue gas oxidation, purification device includes purifier shell, the sewage purification located at purifier shell bottom Separator, the oxidant atomizing sprayer in purifier shell and oxidation, purification separate agent set with aqueous vapor, set The scavenging solution circulating sprayer in the middle part of agent set, the scavenging solution circulated sprinkling dress are separated with aqueous vapor in the oxidation, purification Put the treated water outlet for connecting the sewage purification separator.
Preferably, the atomizing sprayer includes circulating line, multiple atomizers on circulating line, connection The trapping agent feed tube of the circulating line.
Preferably, the gas distribution includes the CO located at the housing bottom with pumping equipment2Cigarette gas inlet pipe and trapping Agent discharge pipe, the trapping agent discharge pipe is sequentially connected trapping agent circulating tank, circulating pump, and the outlet connection of the circulating pump is described Trapping agent feed tube.
Preferably, the trapping agent feed tube is provided with trapping agent feed liquor pipe valve, the CO2Cigarette gas inlet pipe is provided with Flue gas intake valve, the trapping agent discharge pipe discharges pipe valve, the CO provided with trapping agent2Cigarette gas inlet pipe is provided with The inlet end of flue gas intake valve is additionally provided with flue gas main valve.
Preferably, the cooling/heating device include coil pipe, hot flowing into pipeline, hot-fluid go out pipeline, it is cold flowing into pipeline, cold Pipeline is flowed out, the accumulation of energy fluid inlet of the coil pipe connects one end of the hot flowing into pipeline and the cold flowing into pipeline, described The accumulation of energy fluid issuing of coil pipe connects that the hot-fluid goes out pipeline and the cold flow goes out one end of pipeline, the hot flowing into pipeline it is another The other end that one end, the hot-fluid go out pipeline connects the two ends of the used heat energy storage equipment respectively, the cold flowing into pipeline it is another The other end that one end, the cold flow go out pipeline connects cold-storage device respectively, and the cold-storage device uses temperature for 0 DEG C~20 DEG C Cold energy fluid fluid, including underground water or NH3Or CO2
Preferably, the used heat energy storage equipment includes more than the 300 DEG C discarded waste heats produced in accumulation cement production process Or the existing aqueous medium waste heat hair of energy storage equipment, accumulation of 100 DEG C~300 DEG C discarded waste heats of energy storage equipment, accumulation of high temperature heat 150 DEG C~500 DEG C radiant heat of energy storage equipment, accumulation high-temperature service or conduct waste heat of 100 DEG C~170 DEG C discarded waste heats after electricity At least one of energy storage equipment.
Preferably, the CO2Circularly trapping tower include structure it is identical and be arranged in parallel by the CO2Circulation catch release device A and CO2Some sets for releasing device B compositions are caught in circulation, and the flue gas compressor connects some set CO simultaneously2Circularly trapping tower, it is each The CO2The rich N of circularly trapping tower2Gas discharge line connects chimney or N2Storage tank, each CO2The CO of circularly trapping tower2Row Go out pipeline and be sequentially communicated the dewatering dryer.
Preferably, the CO2Circularly trapping tower include structure it is identical and be arranged in series by the CO2Circulation catch release device A and CO2Some sets for releasing device B compositions are caught in circulation, and the flue gas compressor is sequentially connected some set CO2Circularly trapping tower, it is each The CO2The rich N of circularly trapping tower2Gas discharge line connects N2Storage tank, the CO positioned at upstream2The CO of circularly trapping tower2Row Go out the CO that pipeline connection is located at downstream2The gas distribution and pumping equipment of circularly trapping tower.
Compared with prior art, the beneficial effect of technical solution of the present invention:
First, the present invention is to combine cement producing line technological equipment feature and develop, and first cement kiln flue gas is carried out to aoxidize only Change, then mainly contain N to obtained2、CO2And O2Mixing purifying smoke carry out carbon dioxide and nitrogen separation so that sub-argument punish Press elevated CO2Gas, then sends the gas into CO2Circularly trapping tower carries out CO2Continuous trapping, obtains pure CO2, can not only The purifying discharge of cement producing line flue gas is realized, without secondary pollution, the effective emission reduction and low-carbon production of cement production enterprise is realized, Solve the direct exhaust emission environment of existing cement industry flue gas and existing CO2Catching apparatus is also easy to produce secondary pollution Problem, and equipment configuration is simpler, invests small, it is industrially applicable, suitable for promoting the use of, solve existing CO2Catch Collection apparatus and process is complicated, investment is big, the problem of be difficult to promote the use of.
2nd, the present invention takes full advantage of high chimney of tail exhaust blower in cement production process, more than 70 rice etc. these is existing The installations and facilities normally run, major impetus is used as by the use of its normal power consumption so that the whole change system of the present invention is new Energization consumption is extremely low, so as to reduce operation cost, breaching existing CCS technological systems includes CO in IGCC system2The height of trapping Investment, high energy consumption, the bottleneck of high cost, it is economical, solve existing CO2Catching apparatus high energy consumption, operation cost are big The problem of.
3rd, CO of the present invention2Circularly trapping tower uses two-column design, as the CO2Circulation, which is caught, releases device A progress CO2Trapping When, the CO2Circulation, which is caught, releases device B progress CO2From releasing, as the CO2Circulation, which is caught, releases device A CO2Hydration reaction is trapped close to completely When, the CO2Circulation, which is caught, releases device B progress CO2CO continuously can be uninterruptedly made in trapping, thus alternate cycles progress2Stored, Not only airflow is stable for whole technical process, and realizes CO2Continuous high-efficient trapping.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Structure according to these accompanying drawings obtains other accompanying drawings.
Fig. 1 is the CO suitable for cement kiln flue gas that the embodiment of the present invention one is proposed2The knot of the change system continuously trapped Structure schematic diagram.
Fig. 2 is the CO suitable for cement kiln flue gas that Fig. 1 is proposed2CO in the change system continuously trapped2Circularly trapping tower Structural representation.
Fig. 3 is the CO suitable for cement kiln flue gas that Fig. 1 is proposed2Atomizing sprayer in the change system continuously trapped Structural representation.
Fig. 4 is the CO suitable for cement kiln flue gas that Fig. 1 is proposed2Cooling/heating device in the change system continuously trapped Structural representation.
Fig. 5 is the CO suitable for cement kiln flue gas that the embodiment of the present invention two is proposed2The knot of the change system continuously trapped Structure schematic diagram.
Fig. 6 is the CO suitable for cement kiln flue gas that the embodiment of the present invention three is proposed2The knot of the change system continuously trapped Structure schematic diagram.
The drawing reference numeral explanation of the present invention:
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings.Herein it should be noted that for The explanation of these embodiments is used to help understand the present invention, but does not constitute limitation of the invention.In addition, disclosed below As long as each of the invention embodiment in involved technical characteristic do not constitute conflict each other and can just be mutually combined.
The present invention proposes one kind CO suitable for cement kiln flue gas2The change system continuously trapped.
Embodiment one
Fig. 1 is the CO suitable for cement kiln flue gas that the embodiment of the present invention one is proposed2The knot of the change system continuously trapped Structure schematic diagram.Fig. 2 is the CO suitable for cement kiln flue gas that Fig. 1 is proposed2CO in the change system continuously trapped2Circularly trapping tower Structural representation.Fig. 3 is the CO suitable for cement kiln flue gas that Fig. 1 is proposed2Atomizing spray in the change system continuously trapped The structural representation of device.Fig. 4 is the CO suitable for cement kiln flue gas that Fig. 1 is proposed2Cooled down in the change system continuously trapped/ The structural representation of heater.
Fig. 1 is referred to Fig. 4, it is adaptable to CO in cement kiln flue gas2The change system continuously trapped, including cave tail's releaser 1st, chimney 3, flue gas oxidation, purification device 4, N2/CO2Membrane separation device 5, cooler 6, flue gas compressor 7, CO2Circularly trapping tower 8, Dewatering dryer 10, CO2Cooler 11, CO2Compressor 12, liquefaction CO2Storage tank 13;The exhaust outlet connection institute of the tail exhaust blower 1 The air inlet of flue gas oxidation, purification device 4 is stated, the flue gas oxidation, purification device 4 is used to remove the SO in cement kiln flue gas2, NOx, chlorine Compound, fluoride, hydrocarbon, heavy metal and dust pollution thing, the purifying smoke outlet of the flue gas oxidation, purification device 4 connect Lead to the N2/CO2The air inlet of membrane separation device 5, the N2/CO2The rich N of membrane separation device 52Outlet connection chimney 3, richness CO2Outlet passes sequentially through cooler 6 and connects the CO with flue gas compressor 72Circularly trapping tower 8;CO2Circularly trapping tower 8 includes Structure is identical and the CO that is arranged in parallel2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B, the CO2Circulation, which is caught, releases device A and CO2Circulation Catch release device B alternately be carried out continuously CO2Trapping and CO2From releasing, the CO2Circulation, which is caught, releases device A including housing A01/B01, located at housing Gas-liquid separation device A06/B06, the atomizing spray of the gas distribution of bottom with pumping equipment A02/B02 and from top to bottom in housing Device A03/B03, silk screen capture bed apparatus A04/B04, cooling/heating device A05/B05, the case top are additionally provided with temperature and pressure Inductor A09/B09;The gas distribution is connected the outlet of the flue gas compressor 7 with pumping equipment A02/B02, for into housing Send into richness CO2Flue gas body, the atomizing sprayer A03/B03, which is used to be atomized, sprays into CO2Trapping agent, the silk screen capture bed dress Putting A04/B04 includes horizontal silk screen 42, vertical silk screen 43 and the tilting silk screen on support frame 41, the cooling/heating dress A05/B05 connection used heat energy storage equipment 9 is put, described 9 accumulation of heats of used heat energy storage equipment can be useless for what is produced in cement production process Abandon at the top of waste heat, the housing A01/B01 and be provided with richness N2Gas discharge line A07/B07 and CO2Discharge line A08/B08, the richness N2CO is provided with gas discharge line2Sensor;The rich N2Gas discharge line connects chimney 3 or N2Storage tank 14, the CO2Discharge pipe Road is sequentially communicated dewatering dryer 10, CO2Cooler 11, CO2Compressor 12, liquefaction CO2Storage tank 13.
One aspect of the present invention proposes one kind by flue gas oxidation, purification device 4, N2/CO2Membrane separation device 5 and CO2Circularly trapping The new system that tower 8 is constituted, the cement kiln flue gas discharged from the cave tail's releaser 1 after the kiln tail dust-precipitator of cement plant is introduced into described Fluorine therein, chlorine, sulphur, nitre, hydrocarbon and heavy metal are removed in flue gas oxidation, purification device 4 and dust pollution thing is contained N2、CO2And O2Mixing purifying smoke, subsequently into the N2/CO2Carbon dioxide and nitrogen separation are carried out in membrane separation device 5, Isolate rich CO2Flue gas body, the rich CO2Flue gas body enters back into the CO2In circularly trapping tower 8 by hydrate or physics- Chemiadsorption carries out CO2Trapping and CO2From releasing, you can isolate pure CO2, whole change system is not only simple in structure, cost into This is low, industrially applicable, and realizes the purifying discharge of cement producing line flue gas, realizes the effective of cement production enterprise Emission reduction and the production of low-carbon metaplasia.
On the other hand, N of the present invention2/CO2The air inlet side of membrane separation device 5 is directly connected with the cave tail's releaser 1, Can by the use of cave tail's releaser 1 air blast as ahead power, go out CO2Side is connected with cooler 6 and flue gas compressor 7, Ke Yili It is power with the negative-pressure ward masterpiece of flue gas compressor, goes out N2Chimney 3 of the side directly with high more than 70 rice is connected, due to stack effect Also rich N can be produced2The power of side, it is thus of the invention to consume other energy again to promote the infiltration point of carbon dioxide and nitrogen From must set booster fan and air-introduced machine compared to existing membrane separation device must require the expenditure of energy, the present invention fully profit With these existing installations and facilities normally run such as high chimney 3 of cave tail's releaser 1, more than 70 rice in cement production process, Major impetus is used as by the use of its normal power consumption so that the newly-increased energy consumption of change system that the present invention is used is extremely low, drops significantly Energy expenditure in low whole technical process, so as to reduce operation cost.
Another further aspect, CO of the present invention2Circularly trapping tower 8 uses two-column design, as the CO2Circulation, which is caught, releases device A progress CO2During trapping, the CO2Circulation, which is caught, releases device B progress CO2From releasing, as the CO2Circulation, which is caught, releases in device A hydration reaction close to complete Entirely, i.e., as the rich N2Pass through CO in gas discharge line2Sensor monitoring is to CO in tower2When content rises, the CO2Circulation is caught Release device A and switch to CO2From program of releasing, the CO2Circulation, which is caught, releases device B switching progress CO2Trapping, thus alternate cycles progress, can connect Continuous uninterruptedly obtained CO2Stored, not only airflow is stable for whole technical process, realizes CO2Continuous high-efficient trapping, It is particularly suitable for use in CO in the big cement kiln discharge flue gas of gas flow2Trapping.
Provided with horizontal silk screen and vertical/tilting silk screen in further aspect, silk screen capture bed apparatus A04/B04 of the present invention Composition trapping-and from a large space is released, combined with atomizing sprayer A03/B03, make CO2Trapping agent is in countless droplets and richness CO2 Cigarette air flow contacts, more pass through trapping-from the horizontal silk screen released in a large space and vertically/tilting silk screen and reverse flow with big flow Dynamic liquid film contact, and directly produced between silk screen with flue gas and bury in oblivion countless cloth films and film bubble effect, it is first mandatory to change Liquid gas running orbit and haptoreaction state are become, by means of the countless complicated liquid films and film bubble of generation, with extra specific surface area Very thin liquid film and the CO in flue gas stream2Fully contact, quickly and efficiently carry out hydration reaction, second set by means of big silk screen space pass Silk screen silk screen induction nucleation quickly form substantial amounts of CO2Hydrate nucleus;At the same time, with cooling/heating device A05/B05 cold energy fluid cooling is continuous to remove a large amount of combination heats that reinforcing absorption hydration reaction is released, and maintains temperature in trapping tower A 0 DEG C~20 DEG C of degree (depending on feelings selection);Quick and efficient hydration reaction generates a large amount of CO2Hydrate crystal is gathered in trapping tower Silk screen large space trapping-from releasing in bed/space, last selectivity trapping separation CO2Remaining rich N afterwards2Air-flow continue up through The liquid qi leel that gas-liquid separation device A06/B06 merges large space gas-liquid in tower extensively is from liquid is flowed down along inner wall of tower, rich N2Gas Body is continuously discharged, until hydration reaction is close to completely.Thus the present invention uses CO2Trapping agent is to CO2Absorbed, and in reaction CO is used as using the discarded waste heat of cement production process2From required heat energy is released, the newly-increased of whole change system is greatly reduced Energy consumption, not only with higher purification separation effect, and has good energy-saving effect.
Further, electronic three are provided between the cave tail's releaser 1 and the flue gas oxidation, purification device 4, the chimney 3 Ventilation valve 2, the air inlet of the electric three passes air-valve 2 connects the cave tail's releaser 1, the first of the electric three passes air-valve 2 Exhaust outlet connects the flue gas oxidation, purification device 4, and the second exhaust port of the electric three passes air-valve 2 connects the chimney 3.
The electric three passes air-valve 2 CO in cement kiln flue gas is carried out2Trapping when turn on the flue gas oxidation, purification device 4th, cut-out and the connection of the chimney 3, when without CO2During trapping, the cement kiln flue gas conducting connection chimney 3 can be made, used In the safety inspection of input and output gas passage in chimney 3.
Further, the flue gas oxidation, purification device 4 is net including purifier shell, the sewage located at purifier shell bottom Change separator 404, the oxidant atomizing sprayer 402 in purifier shell and oxidation, purification and separate main body with aqueous vapor Device 401, the scavenging solution circulating sprayer 403 that the middle part of agent set 401 is separated located at the oxidation, purification with aqueous vapor, it is described Scavenging solution circulating sprayer 403 connects the treated water outlet of the sewage purification separator 404.
The oxidant atomizing sprayer 402 is used in atomizing spray oxidizing decontamination agent, the cement kiln flue gas SO2、NOx, chloride, fluoride, hydrocarbon and a huge sum of money belong to the oxidation, purification and separated with aqueous vapor in agent set 401 Oxidative cure is main containing sulfate, nitrate, villiaumite, the discarded object of villaumite, and the discarded object is separated by sewage purification and filled 404 carry out separation of solid and liquid are put, the solid waste isolated is discharged in bottom and collected, and the purified water isolated is followed by scavenging solution Ring spray shower device 403 is reintroduced back to the middle part of flue gas oxidation, purification device 4 and carries out circulated sprinkling, so that, oxidized solidification The solid waste produced after decontamination can be utilized as manufacture of cement or industrial chemicals, and the purified water that decontamination is produced can be reintroduced back to Atomizing spray is carried out in flue gas oxidation, purification device 4, the cycling and reutilization of discarded object is realized.
Further, the atomizing sprayer A03/B03 includes circulating line 31, multiple on circulating line 31 The trapping agent feed tube 33 of atomizer 32, the connection circulating line 31.
CO2Trapping agent flow at the multiple atomizer 32 by the trapping agent feed tube 33, circulating line 31 Row atomized spray.
Further, the gas distribution includes the CO located at the housing bottom with pumping equipment A02/B022Cigarette gas inlet Pipe 21 and trapping agent discharge pipe 22, the trapping agent discharge pipe 22 are sequentially connected trapping agent circulating tank 23, circulating pump 24, described to follow The outlet of ring pump 24 connects the trapping agent feed tube 33.
The rich CO sent from the flue gas compressor 72Flue gas body passes through the CO2Cigarette gas inlet pipe 21 enters the CO2 CO is carried out in circularly trapping tower 82Trapping, CO2Trap from releasing rear remaining CO2Trapping solution is drained into by the trapping agent discharge pipe 22 Unified collection is carried out in the trapping agent circulating tank 23, CO next time in tower is treated2Trapping be when will start, and the circulating pump 24 is by CO2Catch Collection agent is pumped into the atomizing sprayer A03/B03 in tower and carries out CO again2The atomizing spray of trapping agent, thus achieves original Material is recycled.
Further, the trapping agent feed tube 33 is provided with trapping agent feed liquor pipe valve 331, the CO2Cigarette gas inlet Pipe 21 is provided with flue gas intake valve 211, and the trapping agent discharge pipe 22 discharges pipe valve 221, the CO provided with trapping agent2 Inlet end of the cigarette gas inlet pipe 21 provided with flue gas intake valve is additionally provided with flue gas main valve 212, the rich N2Gas discharge line A07/B07 is provided with N2Gas discharges switching valve 71, the CO2Discharge line A08/B08 is provided with CO2Discharge switching valve 81.
The trapping agent feed liquor pipe valve 331 is used to control CO2The input of trapping agent, flue gas main valve 212 is used to control from institute State the rich CO that flue gas compressor 7 is sent2Total break-make of flue gas body, the flue gas intake valve 211 is used to control the rich CO2Flue gas Body is in the CO2Circulation, which is caught, releases device A (or CO2Circulation, which is caught, releases device B) carry out CO2Opened during trapping, carry out CO2Closed from when releasing, institute Stating trapping agent discharge pipe valve 221 is used for CO in tower2From having released rear CO2The discharge of trapping agent and waste liquid, the N2Gas discharges switching valve 71 are used to control the rich N2Gas discharge line A07/B07 is in the CO2Circulation, which is caught, releases device A (or CO2Circulation, which is caught, releases device B) carry out CO2Turned on during trapping, carry out CO2Cut off from when releasing, the CO2Discharge switching valve 81 is used to control the CO2Discharge line A08/ B08 is in the CO2Circulation, which is caught, releases device A (or CO2Circulation, which is caught, releases device B) carry out CO2Cut off during trapping, carry out CO2Turned on from when releasing, Thereby guarantee that CO2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B stably alternately CO2Trapping and CO2From releasing, realize efficient Continuous CO2Trapping separation.
Further, the cooling/heating device A05/B05 goes out pipeline including coil pipe 51, hot flowing into pipeline 52, hot-fluid 53rd, cold flowing into pipeline 54, cold flow go out pipeline 55, the accumulation of energy fluid inlet 51m connections hot flowing into pipeline 52 of the coil pipe 51 With one end of the cold flowing into pipeline 54, the accumulation of energy fluid issuing 51n connections hot-fluid of the coil pipe 51 goes out pipeline 53 and institute State one end that cold flow goes out pipeline 54, the other end that the other end, the hot-fluid of the hot flowing into pipeline 52 go out pipeline 53 connects respectively The two ends of the used heat energy storage equipment are connect, the other end of the cold flowing into pipeline 54, the cold flow go out the other end point of pipeline 55 Do not connect cold-storage device, the cold-storage device uses temperature for 0 DEG C~20 DEG C of cold energy fluid, including underground water or NH3Or CO2
The cooling/heating device A05/B05, except that can be coil exchanger, can also be calandria heat exchanger, The heat exchanger channels shape of heat exchanging device is not limited.The hot flowing into pipeline 52, hot-fluid go out pipeline 53, cold flowing into pipeline 54, cold The on and off that corresponding pipeline valve carrys out control pipeline is respectively equipped with outflow pipeline 55, to carry out CO in tower2During trapping It is input into cold energy fluid and carries out CO to being cooled in tower, in tower2Heated from heat energy fluid is inputted when releasing.
Ground is not limited, and the cold energy fluid uses temperature for 0 DEG C~20 DEG C of cold energy fluid, for absorbing CO2Trapping is released The reaction heat put, can make temperature in tower lower.
Further, the used heat energy storage equipment 9 include in accumulation cement production process produce more than 300 DEG C it is discarded more than The existing aqueous medium waste heat of energy storage equipment, accumulation of 100 DEG C~300 DEG C discarded waste heats of energy storage equipment, accumulation of heat or high temperature heat 150 DEG C~500 DEG C radiant heat of energy storage equipment, accumulation high-temperature service of 100 DEG C~170 DEG C discarded waste heats after generating or conduction are useless At least one of energy storage equipment of heat.
The used heat energy storage equipment 9 make use of the discarded a large amount of waste heats of cement producing line as CO2The energy of trapping, reduction The newly-increased energy consumption of whole change system, reduces operation cost, breaches CO in existing CCS technological systems2The high throwing of trapping Money, high energy consumption, the bottleneck of high cost, it is economical.
Embodiment two
Fig. 5 is the CO suitable for cement kiln flue gas that the embodiment of the present invention two is proposed2The knot of the change system continuously trapped Structure schematic diagram.
Referring to Fig. 5, the present embodiment two and the difference of embodiment one are:The CO2Circularly trapping tower includes knot Structure it is identical and be arranged in parallel by the CO2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases two sets that device B is constituted, first set CO2Circulation Trapping tower 8 includes CO2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B, second set of CO2Circularly trapping tower 8 ' includes CO2Circulation, which is caught, to be released Device A ' and CO2Circulation, which is caught, releases device B ', each CO2The rich N for releasing device (A, B, A ', B ') is caught in circulation2Gas discharge line connects chimney Or N2Storage tank, each CO2The CO for releasing device (A, B, A ', B ') is caught in circulation2Discharge line is sequentially communicated the dewatering dryer.
So that, through N2/CO2The rich CO that membrane separation device is isolated2Flue gas body is divided into two strands while being continuously respectively fed to First set CO2Circularly trapping tower and second set of CO2In circularly trapping tower, first set CO2Circularly trapping tower and second set of CO2Circulation The N that trapping tower is discharged respectively2Air-flow all passes through the smoke stack emission, first set CO2Circularly trapping tower and second set of CO2Circulation is caught The CO of Ji Ta separation discharges2Air-flow is all continuously introduced into drier dehydration by the cooling compression set negative-pressure ward of drying of back segment, with After carry out CO2Storage.
Using two sets of CO being arranged in parallel2Circularly trapping tower, can double rich CO2The treating capacity of flue gas, improves CO2's Collection efficiency.
Embodiment three
Fig. 6 is the CO suitable for cement kiln flue gas that the embodiment of the present invention three is proposed2The knot of the change system continuously trapped Structure schematic diagram.
Referring to Fig. 6, the present embodiment three and the difference of embodiment one are:The CO2Circularly trapping tower includes knot Structure it is identical and be arranged in series by the CO2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases two sets that device B is constituted, first set CO2Circulation Trapping tower includes CO2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B, second set of CO2Circularly trapping tower includes CO2Circulation, which is caught, releases device A " and CO2Circulation, which is caught, releases device B ", and the flue gas compressor first connects first set CO2Circularly trapping tower, CO described in first set2Circulation Trap the rich N of tower2Gas discharge line connects chimney or N2Storage tank, first set CO2The CO of circularly trapping tower2Discharge line connection the Two sets of CO2The gas distribution and pumping equipment of circularly trapping tower, second set of CO2The rich N of circularly trapping tower2Gas discharge line connects N2Storage Tank, second set of CO2The CO of circularly trapping tower2Discharge line connects dewatering dryer.
So that, through N2/CO2The rich CO that membrane separation device is isolated2Flue gas body all first sends into first set CO2Circulation Trap tower (A, B) and carry out CO2Trap from releasing, trap the N isolated2Air-flow directly by smoke stack emission or delivers to N2Storage tank enters Row storage, the rich CO that trapping separation is produced2Gas sends into second set of CO2CO is carried out in circularly trapping tower again2Trap from releasing, Two sets of CO2The N of circularly trapping tower separation discharge2Air-flow purity height is fed directly to N2Storage tank is stored, second set of CO2Circulation is caught The CO of Ji Ta separation discharges2Air-flow is continuously introduced into drier dehydration by the cooling compression set negative-pressure ward of drying of back segment, also enters Row CO2Storage.
Using two sets of CO being arranged in series2Circularly trapping tower unit, further effectively increases CO2The purity of collection.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every at this Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectly It is included in other related technical fields in the scope of patent protection of the present invention.

Claims (10)

1. one kind CO suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that including cave tail's releaser, cigarette Chimney, flue gas oxidation, purification device, N2/CO2Membrane separation device, cooler, flue gas compressor, CO2Circularly trapping tower, dewatering dryer, CO2Cooler, CO2Compressor, liquefaction CO2Storage tank;
The exhaust outlet of the tail exhaust blower connects the air inlet of the flue gas oxidation, purification device, and the flue gas oxidation, purification device is used for Remove the SO in cement kiln flue gas2, NOx, chloride, fluoride, hydrocarbon, heavy metal and dust pollution thing, the cigarette N described in the purifying smoke outlet of gas oxidation, purification device2/CO2The air inlet of membrane separation device, the N2/CO2UF membrane is filled The rich N put2Outlet connection chimney, richness CO2Outlet passes sequentially through cooler and the CO is connected with flue gas compressor2Circulation is caught Ji Ta;
CO2Circularly trapping tower includes the CO that structure is identical and is arranged in parallel2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B, the CO2 Circulation, which is caught, releases device A and CO2Circulation catch release device B alternately be carried out continuously CO2Trapping and CO2From releasing, the CO2Circulation, which is caught, to be released device A and includes Housing, gas distribution and pumping equipment located at housing bottom and gas-liquid separation device from top to bottom in housing, atomizing spray Device, silk screen capture bed apparatus, cooling/heating device, the case top are additionally provided with temperature and pressure inductor;The gas distribution and discharge opeing Device connects the outlet of the flue gas compressor, for sending into richness CO into housing2Flue gas body, the atomizing sprayer is used for Atomization sprays into CO2Trapping agent, silk screen capture bed apparatus includes horizontal silk screen on support frame, vertical silk screen and tilting Silk screen, the cooling/heating device connects used heat energy storage equipment, and used heat energy storage equipment institute accumulation of heat can be cement production process The discarded waste heat of middle generation, the case top is provided with richness N2Gas discharge line and CO2Discharge line, the rich N2Gas discharge pipe CO is provided with road2Sensor;
The rich N2Gas discharge line connects chimney or N2Storage tank, the CO2Discharge line is sequentially communicated dewatering dryer, CO2It is cold But device, CO2Compressor, liquefaction CO2Storage tank.
2. the CO as claimed in claim 1 suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that described Electric three passes air-valve, the electric three passes air-valve are provided between cave tail's releaser and the flue gas oxidation, purification device, the chimney Air inlet connect the cave tail's releaser, the first row gas port of the electric three passes air-valve connects the flue gas oxidation, purification Device, the second exhaust port of the electric three passes air-valve connects the chimney.
3. the CO as claimed in claim 1 suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that described Flue gas oxidation, purification device includes purifier shell, the sewage purification separator located at purifier shell bottom, located at clarifier Oxidant atomizing sprayer and oxidation, purification in housing separate agent set with aqueous vapor, located at the oxidation, purification and aqueous vapor The scavenging solution circulating sprayer in the middle part of agent set is separated, the scavenging solution circulating sprayer connects the sewage purification point From the treated water outlet of device.
4. the CO as claimed in claim 1 suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that described Atomizing sprayer includes circulating line, multiple atomizers on circulating line, the trapping of the connection circulating line Agent feed tube.
5. the CO as claimed in claim 4 suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that described Gas distribution includes the CO located at the housing bottom with pumping equipment2Cigarette gas inlet pipe and trapping agent discharge pipe, the trapping agent Discharge pipe is sequentially connected trapping agent circulating tank, circulating pump, and the outlet of the circulating pump connects the trapping agent feed tube.
6. the CO as claimed in claim 5 suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that described Trapping agent feed tube is provided with trapping agent feed liquor pipe valve, the CO2Cigarette gas inlet pipe is provided with flue gas intake valve, the trapping Agent discharge pipe discharges pipe valve, the CO provided with trapping agent2Cigarette gas inlet pipe is provided with the inlet end of flue gas intake valve It is additionally provided with flue gas main valve.
7. the CO as claimed in claim 1 suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that described Cooling/heating device includes coil pipe, hot flowing into pipeline, hot-fluid and goes out pipeline, cold flowing into pipeline, cold flow and go out pipeline, the coil pipe Accumulation of energy fluid inlet connects one end of the hot flowing into pipeline and the cold flowing into pipeline, and the accumulation of energy fluid issuing of the coil pipe connects Connect that the hot-fluid goes out pipeline and the cold flow goes out one end of pipeline, the other end, the hot-fluid of the hot flowing into pipeline go out pipeline The other end connect the two ends of the used heat energy storage equipment respectively, the other end of the cold flowing into pipeline, the cold flow go out pipeline The other end connect cold-storage device respectively, the cold-storage device uses temperature for 0 DEG C~20 DEG C of cold energy fluid fluid, including ground Lower water or NH3Or CO2
8. the CO as claimed in claim 1 suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that described Used heat energy storage equipment includes more than the 300 DEG C discarded waste heats produced in accumulation cement production process or the accumulation of energy dress of high temperature heat Put, 100 DEG C~170 DEG C after the existing aqueous medium cogeneration of energy storage equipment, accumulation of 100 DEG C~300 DEG C discarded waste heats of accumulation In 150 DEG C~500 DEG C radiant heat of energy storage equipment, accumulation high-temperature service of discarded waste heat or the energy storage equipment of conduct waste heat at least It is a kind of.
9. the CO as claimed in claim 1 suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that described CO2Circularly trapping tower include structure it is identical and be arranged in parallel by the CO2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B compositions Some sets, the flue gas compressor connects some set CO simultaneously2Circularly trapping tower, each CO2Circularly trapping tower Rich N2Gas discharge line connects chimney or N2Storage tank, each CO2The CO of circularly trapping tower2Discharge line is sequentially communicated described Dewatering dryer.
10. the CO as claimed in claim 1 suitable for cement kiln flue gas2The change system continuously trapped, it is characterised in that institute State CO2Circularly trapping tower include structure it is identical and be arranged in series by the CO2Circulation, which is caught, releases device A and CO2Circulation, which is caught, releases device B structures Into some sets, the flue gas compressor is sequentially connected some set CO2Circularly trapping tower, each CO2Circularly trapping tower Rich N2Gas discharge line connects N2Storage tank, the CO positioned at upstream2The CO of circularly trapping tower2Under discharge line connection is located at The CO of trip2The gas distribution and pumping equipment of circularly trapping tower.
CN201710253279.8A 2017-04-18 2017-04-18 One kind CO suitable for cement kiln flue gas2The change system continuously trapped Pending CN107115776A (en)

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Application publication date: 20170901