CN206823510U - One kind CO suitable for cement kiln flue gas2The change system continuously trapped - Google Patents

Abstract

The utility model 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 connect 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, rich 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 utility model is not only simple in structure, industrially applicable, and realizes the purifying discharge of cement producing line flue gas, realizes the effective emission reduction and the production of low-carbon metaplasia of cement production enterprise, also achieves 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 utility model belongs to emission-control equipment technical field, and in particular to one kind CO suitable for cement kiln flue gas₂ The change system continuously trapped.

Background technology

Climate change has turned into one of the problem of influence human survival and development, and the carbon dioxide of industrial discharge is considered as It is the main reason for causing 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 are caught Obtaining, using with sealing up for safekeeping) the fortune economy of the trapping cost with high investment, high of technology becomes the serious hindrances of popularization and application, and it is 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, integrated gas-steam combined cycle power plant technology application in.

Due to current maximum CO₂It is mainly the power plant using coal as raw material to discharge point source, 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, obtain CO and H₂, then convert by vapor, CO switchs to CO₂, then pass through separation or CO₂Capture technique, Respectively obtain the H of high concentration₂And CO₂, H₂It can be exported using combustion power generation or as the carbon-free energy.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 account 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 using 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 traps 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 trap using clearance-type.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 have and be 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 is the sides that are different and obtaining separation by the infiltration rate in film of each component in mixed gas Method, currently used for separating CO₂Membrane material mainly have the polymer such as cellulose acetate, polysulfones, makrolon.For large-scale CO₂Trapping system, film method also have 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 that technical process is relatively easy, and energy consumption is relatively low, can remove and return from synthetic-ammonia transformation gas 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 environmental hazard caused by geology is noted objectively with ocean envelope is not expectable.

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, closing and the research of application or practice report.And the actual production capacity of cement in 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 largely discarded waste heat And exhaust emissions, during fume environment protection qualified discharge in the waste gas of its discharge pollutant composition mostly fluctuation in CO₂12~ 29%th, SO₂80~200mg/Nm³、NO_x100~400mg/Nm³, 10~30mg/Nm of dust³, and contain a small amount of nytron Thing, fluorine chlorine compound and heavy metal, manufacture of cement are closed because of its kiln gas composition of its process characteristic and property with coal chemical industry There is significant difference into gas, natural gas, coal electricity flue gas or even IGCC gas.The CO of manufacture of cement₂Discharge can be divided into material carbon hydrochlorate Decomposition and fuel burning caused by CO₂Direct discharge and production process consumption external power etc. caused by between Run in and put.According to China Building Material Scientific Research General Institute to China cement industry CO₂Emission analysis, China's cement production process are former The CO of material decomposition, fuel combustion and power consumption₂Discharge capacity accounts for 59%, 26%, the 12% of manufacture of cement total release respectively, comprehensive Close 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 3500000000 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 Urgent and necessity is more highlighted, but because still missing is directed to the specific CO of cement kiln flue gas₂The research and development of trapping technique, in addition Existing CO₂The capacity limit that the high Cost Problems of trapping technique application can have been born far beyond cement production enterprise, and cement is given birth to Production because its kiln gas composition of its process characteristic and fluid properties and coal chemical industry synthesis gas, natural gas, coal electricity flue gas or even IGCC gas has significant difference, for the thin cement industry of this personal value low (cement price is low) 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 also up to 150 DEG C~300 DEG C, give birth to by 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, reduce the demand in cement production enterprise production process to extraneous energy consumption (electricity, coal), reduce environmental contaminants Discharge is necessary, and there is an urgent need to for cement production process installation feature, exploitation is a kind of to be utilized in cement production process greatly Waste heat is discarded caused by amount, reduces 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 utility application of Application No. 201510579908.7 discloses a kind of based on embrane method classification trapping combustion CO in flue-gas₂Apparatus and method, it is using " first enrichment, rear trapping " method, traps CO in desulfurization neat stress in two steps₂： Coal-fired flue-gas after desulfurizer, enters separating film module, by adjusting booster fan and air-introduced machine by booster fan boosting only Between matching relationship ensure separating film module retentate side be in barotropic state；Meanwhile per-meate side air-introduced machine is adjusted, ensure to divide Per-meate side from membrane module keeps required negative pressure state；Booster fan, air-introduced machine, per-meate side air-introduced machine collective effect Under, the CO in the both sides of film formation pressure difference, pressure differential retentate side flue gas₂Permeate, realized to CO in flue gas to per-meate side₂'s Separation；Retentate side gas is discharged under air-introduced machine effect by chimney, the small tolerance of per-meate side, high concentration CO₂Enriched gas, oozing The air-introduced machine effect of saturating side is lower to enter depth CO₂Capturing device, further it is 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

Main purpose of the present utility model is to provide one kind CO suitable for cement kiln flue gas₂The equipment system continuously trapped System, it is intended to solve existing CO₂Capturing device is complicated, it is purifying not enough, high energy consumption, cost height the problem of being not easy to promote.

To achieve the above object, the utility model proposes a kind of CO suitable for cement kiln flue gas₂The equipment continuously trapped System, including cave tail's releaser, chimney, flue gas oxidation, purification device, N₂/CO₂Membrane separation device, cooler, flue gas compressor, CO₂ Circularly trapping tower, dewatering dryer, CO₂Cooler, CO₂Compressor, liquefaction CO₂Storage tank；The exhaust outlet connection of the tail exhaust blower The air inlet of the flue gas oxidation, purification device, the flue gas oxidation, purification device are 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 connect Lead to the N₂/CO₂The air inlet of membrane separation device, the N₂/CO₂The rich N of membrane separation device₂Outlet connection chimney, rich CO₂Row Outlet passes sequentially through cooler and the CO is connected with flue gas compressor₂Circularly trapping tower；CO₂It is identical that circularly trapping tower includes structure 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 Alternating is carried out continuously CO₂Trapping and CO₂From releasing, the CO₂Circulation, which is caught, to be released device A and includes housing, the gas distribution located at housing bottom and row Liquid device and the from top to bottom gas-liquid separation device in housing, atomizing sprayer, silk screen capture bed apparatus, cooling/add Thermal, the case top are additionally provided with temperature and pressure inductor；The gas distribution is connected going out for the flue gas compressor with pumping equipment Mouthful, for being sent into rich CO into housing₂Flue gas body, the atomizing sprayer, which is used to be atomized, sprays into CO₂Trapping agent, the silk screen Capturing bed apparatus includes horizontal silk screen, vertical silk screen and tilting silk screen on support frame, the cooling/heating device connection Used heat energy storage equipment, used heat energy storage equipment institute accumulation of heat can be caused discarded waste heat in cement production process, the housing Rich N is provided with the top of A01₂Gas discharge line and CO₂Discharge line, the rich N₂CO is provided with gas discharge line₂Sensor；It is described Rich N₂Gas discharge line connects chimney or N₂Storage tank, the CO₂Discharge line is sequentially communicated dewatering dryer, CO₂Cooler, CO₂ Compressor, 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 connect 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 are sequentially connected trapping agent circulating tank, circulating pump, described in the outlet connection of the circulating pump 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 are provided with trapping agent discharge pipe valve, the CO₂Cigarette 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 includes coil pipe, hot flowing into pipeline, hot-fluid go out pipeline, 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 both 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 as 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 300 DEG C discarded waste heats caused by 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 solutions of the utility model：

First, the utility model is developed with reference to cement producing line technological equipment feature, first carries out oxygen to cement kiln flue gas Change purification, then mainly contain N to obtained₂、CO₂And O₂Mixing purifying smoke carry out carbon dioxide and nitrogen separation, so as to sub-argument Elevated CO is pressed in punishment₂Gas, the gas is then sent into CO₂Circularly trapping tower carries out CO₂Continuous trapping, obtains pure CO₂, no It is only capable of realizing the purifying discharge of cement producing line flue gas, without secondary pollution, realizes effective emission reduction and the low-carbon of cement production enterprise Production, solves the direct exhaust emission environment of existing cement industry flue gas and existing CO₂Catching apparatus is also easy to produce secondary The problem of pollution, and equipment configuration is simpler, and investment is small, industrially applicable, suitable for promoting the use of, solves existing CO₂Catching apparatus complex process, investment is big, the problem of being not easy to promote the use of.

2nd, the utility model 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 of some normal operations, it is used as major impetus by the use of its normal power consumption so that the utility model entirely fills The standby newly-increased energy consumption of system is extremely low, and so as to reduce operation cost, breaching existing CCS technological systems includes CO in IGCC system₂ The with high investment of trapping, high energy consumption, the bottleneck of high cost, it is economical, solve existing CO₂Catching apparatus high energy consumption, fortune Seek the problem of cost is big.

3rd, the utility model CO₂Circularly trapping tower uses two-column design, as the CO₂Circulation, which is caught, releases device A progress CO₂Catch During collection, 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 complete It is full-time, the CO₂Circulation, which is caught, releases device B progress CO₂Trapping, thus alternate cycles progress, CO continuously can uninterruptedly be made₂Stored up Deposit, not only airflow is stable for whole technical process, and realizes CO₂Continuous high-efficient trapping.

Brief description of the drawings

, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.

Fig. 1 is the CO suitable for cement kiln flue gas that the utility model embodiment one proposes₂The change system continuously trapped Structural representation.

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 utility model embodiment two proposes₂The change system continuously trapped Structural representation.

Fig. 6 is the CO suitable for cement kiln flue gas that the utility model embodiment three proposes₂The change system continuously trapped Structural representation.

Drawing reference numeral explanation of the present utility model：

Embodiment

Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.Herein it should be noted that It is used to help understand the utility model for the explanation of these embodiments, but does not form to restriction of the present utility model.This Outside, as long as technical characteristic involved in each embodiment of the utility model disclosed below does not form conflict each other Can is mutually combined.

The utility model proposes a kind of 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 utility model embodiment one proposes₂The change system continuously trapped Structural representation.Fig. 2 is the CO suitable for cement kiln flue gas that Fig. 1 is proposed₂CO in the change system continuously trapped₂Circulation is caught Ji Ta structural representation.Fig. 3 is the CO suitable for cement kiln flue gas that Fig. 1 is proposed₂It is atomized in the change system continuously trapped The structural representation of spray equipment.Fig. 4 is the CO suitable for cement kiln flue gas that Fig. 1 is proposed₂In the change system continuously trapped The structural representation of cooling/heating device.

Fig. 1 to Fig. 4 is referred to, the CO suitable for 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 catch release device A include housing A01/B01, located at housing The gas distribution of bottom the gas-liquid separation device A06/B06 in housing, atomizing spray with pumping equipment A02/B02 and from top to bottom 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 It is sent into rich 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 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 caused useless in cement production process Waste heat is abandoned, rich N is provided with the top of the housing A01/B01₂Gas 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.

On the one hand the utility model proposes one kind by flue gas oxidation, purification device 4, N₂/CO₂Membrane separation device 5 and CO₂Circulation The new system that tower 8 is formed is trapped, 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 Fluorine, chlorine, sulphur, nitre, hydrocarbon and heavy metal and dust pollution thing therein is removed in the flue gas oxidation, purification device 4 to obtain Containing N₂、CO₂And O₂Mixing purifying smoke, subsequently into the N₂/CO₂Carbon dioxide and nitrogen point are carried out in membrane separation device 5 From isolating rich CO₂Flue gas body, the rich CO₂Flue gas body enters back into the CO₂Pass through hydrate or thing in circularly trapping tower 8 Reason-chemiadsorption carries out CO₂Trapping and CO₂From releasing, you can isolate pure CO₂, whole change system is not only simple in structure, makes Valency cost is low, industrially applicable, and realizes the purifying discharge of cement producing line flue gas, realizes cement production enterprise Effective emission reduction and the production of low-carbon metaplasia.

On the other hand, N described in the utility model₂/CO₂The air inlet side of membrane separation device 5 directly with the cave tail's releaser 1 Connection, can go out CO by the use of the air blast of cave tail's releaser 1 as ahead power₂Side is connected with cooler 6 and flue gas compressor 7, can Using the negative-pressure ward masterpiece using flue gas compressor as power, go out N₂Chimney 3 of the side directly with high more than 70 rice connects, due to chimney Effect can also produce rich N₂The power of side, thus the utility model without consuming other energy to promote carbon dioxide and nitrogen again Permeability and separation, must set booster fan and air-introduced machine compared to existing membrane separation device must require the expenditure of energy, this reality These existing normal operations such as the high chimney 3 of cave tail's releaser 1 in cement production process, more than 70 rice are taken full advantage of with new Installations and facilities, be used as major impetus by the use of its normal power consumption so that the utility model use change system increase newly Energy consumption is extremely low, greatly reduces the energy expenditure in whole technical process, so as to reduce operation cost.

Another further aspect, the utility model CO₂Circularly trapping tower 8 uses two-column design, as the CO₂Circulation, which is caught, to be released device A and enters Row 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 releasing program, 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, CO in the cement kiln discharge flue gas big especially suitable for gas flow₂Trapping.

Further aspect, silk screen capture bed apparatus A04/B04 described in the utility model are interior provided with horizontal silk screen and vertical/tilting The trapping of silk screen composition-and from a large space is released, combined with atomizing sprayer A03/B03, make CO₂Trapping agent in countless droplets with Rich CO₂Cigarette air flow contacts, more with big flow by trapping-from the horizontal silk screen and vertical/tilting silk screen released in a large space with The liquid film contact of reverse flow, and directly produced between silk screen with flue gas and bury in oblivion countless cloth films and film bubble effect, first by force System has sexually revised liquid gas running orbit and haptoreaction state, by means of caused countless complicated liquid films and film bubble, compares table with super large The very thin liquid film of area and the CO in flue gas stream₂Fully contact, quickly and efficiently carry out hydration reaction, it is second empty by means of big silk screen Between all over the silk screen induction nucleation of the silk screen that sets quickly form substantial amounts of CO₂Hydrate nucleus；At the same time, with cooling/plus Continuous remove of thermal A05/B05 cold energy fluid cooling strengthens a large amount of combination heats that absorption hydration reaction is released, and maintains trapping 0 DEG C~20 DEG C of temperature (being selected depending on feelings) in tower A；Quick and efficient hydration reaction generates a large amount of CO₂Hydrate crystal is gathered in Silk screen large space trapping in trapping tower-and from releasing in bed/space, last selectivity trapping separation CO₂Remaining rich N afterwards₂Air-flow after It is continuous upwards through gas-liquid separation device A06/B06 by the liquid qi leel that large space gas-liquid in tower merges extensively from, liquid along inner wall of tower stream Under, rich N₂Gas is continuously discharged, until hydration reaction is close to completely.Thus the utility model uses CO₂Trapping agent is to CO₂Carry out Absorb, and the discarded waste heat of cement production process is used as CO in reacting₂From required heat energy is released, whole dress is greatly reduced The newly-increased energy consumption of standby system, not only has higher purification separation effect, and have 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 connection cave tail's releaser 1 of the electric three passes air-valve 2, 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, cement kiln flue gas conducting can be made to connect the chimney 3, used In the safety inspection of input and output gas passage in chimney 3.

Further, it is net to include purifier shell, the sewage located at purifier shell bottom for the flue gas oxidation, purification device 4 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 for separating with aqueous vapor located at the oxidation, purification middle part of agent set 401, 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 for atomizing spray oxidizing decontamination agent, in the cement kiln flue gas SO₂、NO_x, 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 Caused solid waste can be used as manufacture of cement or industrial chemicals to utilize after decontamination, and purified water can be reintroduced back to caused by decontamination Atomizing spray is carried out in flue gas oxidation, purification device 4, realizes the cycling and reutilization of discarded object.

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 is 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, treats next CO in tower₂Trapping 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 recycles.

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 is provided with trapping agent discharge pipe valve 221, the CO₂ The inlet end that cigarette gas inlet pipe 21 is 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 are 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 are 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 State trapping agent discharge pipe valve 221 and be used for CO in tower₂From CO after having released₂The 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 both 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 as 0 DEG C~20 DEG C of cold energy fluid, including underground water or NH₃Or CO₂。

The cooling/heating device A05/B05 can also be calandria heat exchanger except that can be coil exchanger, The heat exchanger channels shape of heat exchanging device does not limit.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 Cold energy fluid is input into being cooled in tower, CO being carried out in tower₂Heated from heat energy fluid is inputted when releasing.

Ground is not limited, and the cold energy fluid uses temperature as 0 DEG C~20 DEG C of cold energy fluid, for absorbing CO₂Trapping is released The reaction heat put, temperature in tower can be made to lower.

Further, the used heat energy storage equipment 9 is discarded remaining including caused more than 300 DEG C in accumulation cement production process 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, reduce 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 utility model embodiment two proposes₂The change system continuously trapped Structural representation.

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 formed, 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 is 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 utility model embodiment three proposes₂The change system continuously trapped Structural representation.

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 formed, 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 is all first sent into first set CO₂Circulation Trap tower (A, B) and carry out CO₂Trap the N for from releasing, trapping and isolating₂Air-flow directly by smoke stack emission or delivers to N₂Storage tank enters Row storage, rich CO caused by trapping separation₂Gas is sent 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.

Preferred embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, Every equivalent structure under utility model of the present utility model design, made using the utility model specification and accompanying drawing content Conversion, or directly/be used in other related technical areas indirectly and be included in scope of patent protection of the present utility model.

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 fills The rich N put₂Outlet connection chimney, rich 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, the gas distribution located at the housing bottom gas-liquid separation device in housing, atomizing spray with pumping equipment and from top to bottom 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 being sent into rich CO into housing₂Flue gas body, the atomizing sprayer are used for Atomization sprays into CO₂Trapping agent, silk screen capture bed apparatus include horizontal silk screen on support frame, vertical silk screen and tilting Silk screen, the cooling/heating device connect used heat energy storage equipment, and used heat energy storage equipment institute accumulation of heat can be cement production process In caused discarded waste heat, the case top is provided with rich 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 suitable for cement kiln flue gas as claimed in claim 1₂The 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 connect the chimney.

3. the CO suitable for cement kiln flue gas as claimed in claim 1₂The 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 suitable for cement kiln flue gas as claimed in claim 1₂The change system continuously trapped, it is characterised in that described Atomizing sprayer includes the trapping of circulating line, multiple atomizers on circulating line, the connection circulating line Agent feed tube.

5. the CO suitable for cement kiln flue gas as claimed in claim 4₂The 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 suitable for cement kiln flue gas as claimed in claim 5₂The 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 is provided with trapping agent discharge pipe valve, the CO₂Cigarette 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 suitable for cement kiln flue gas as claimed in claim 1₂The 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 One end that the hot-fluid goes out pipeline and the cold flow goes out pipeline is connect, the other end, the hot-fluid of the hot flowing into pipeline go out pipeline The other end connect the both 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 as 0 DEG C~20 DEG C of cold energy fluid fluid, including ground Lower water or NH₃Or CO₂。

8. the CO suitable for cement kiln flue gas as claimed in claim 1₂The change system continuously trapped, it is characterised in that described Used heat energy storage equipment includes more than 300 DEG C discarded waste heats caused by 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 suitable for cement kiln flue gas as claimed in claim 1₂The 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 suitable for cement kiln flue gas as claimed in claim 1₂The 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.