CN206642578U

CN206642578U - It is a kind of to be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas

Info

Publication number: CN206642578U
Application number: CN201720403942.3U
Authority: CN
Inventors: 尹小林
Original assignee: Changsha Zichen Technology Development Co Ltd
Current assignee: Changsha Zichen Technology Development Co Ltd
Priority date: 2017-04-18
Filing date: 2017-04-18
Publication date: 2017-11-17
Anticipated expiration: 2027-04-18

Abstract

It is a kind of to be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas, mainly include tail exhaust blower, electric three passes air-valve, chimney, flue gas oxidation, purification device, membrane separation device, cooler, flue gas compressor, CO₂Circularly trapping tower, energy strorage by using residual heat device, dewatering dryer, CO₂Cooler, CO₂Compressor, liquefaction CO₂Storage tank, CO₂High-pressure pump, CO₂Energy storage equipment, flow straightener, turbine, generator and regenerator.The utility model can realize demand of the manufacture of cement to extraneous zero power consumption, and the recycling economy target of " 401 is negative " is realized beneficial to cement production enterprise；Waste gas, waste water, used heat and dust pollution to caused by environment can be greatly decreased in cement production process, effectively realize the effective emission reduction and low-carbon production of manufacture of cement.

Description

It is a kind of to be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas

Technical field

Environmentally friendly low-carbon and energy technology field are the utility model is related to, more particularly to one kind is filled using manufacture of cement Wiring technology Standby feature and exhaust gas components characteristic, with caused discarded waste heat energy in cement production process and/or the high temperature adversely affected Heat energy is the CO of main energy sources₂The continuous device for trapping and generating electricity.

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 the high throwing of current carbon emission reduction and CCS the or CCUS technologies of reply climate change Money, the fortune economy of high trapping cost become the serious hindrance of popularization and application, the research of existing CCS or CCUS technologies and Demonstration Application, which is concentrated mainly on, must separate except high concentration CO₂Coal chemical industry, synthesis gas and coal electrical domain, and coal electrical domain collection In with IGCC coal gasifications, integrated gas-steam combined cycle power plant（IGCC）In the application of technology.

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 with IGCC coal gasifications, integrated gas-steam combined cycle power plant（IGCC）Technology is base Plinth, first by coal gasification, obtain CO and H₂, then convert by vapor, CO switchs to CO₂, then pass through separation or CO₂Capture skill Art, 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 technology₂ Trapping 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, contained substantial amounts of nitrogen removes in air, obtains high-purity The O of degree₂, then by high concentration O₂Combustion system is introduced, beneficial to CO₂Further capture and processing, or using pure oxygen as combustion-supporting Agent, while in combustion to being pressurizeed in boiler so that the main component after burning in flue gas is CO₂And water, after separation water, So CO of flue gas middle and high concentration₂Gas can directly be compressed seizure.Oxygen-enriched combusting trapping technique except investment is high, operation into Outside this height, increase energy resource consumption 20~50%, ton CO₂Cost 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 CO₂Skill among absorption process Art is most ripe, most widely used, and has and be appropriate for extensive CO₂Catch the technical scheme of potentiality.But capture technique is answered Miscellaneous, investment is big, is also easy to produce secondary pollution and some solvents have toxicity, solvent needs regeneration to consume mass energy, trapped into This height.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 extensive CO₂Trapping system, film method also have larger gap in cost and on reliability requirement.Pressure swing adsorption method therein （PSA）General principle be using adsorbent it is different with the change of pressure to the adsorbance of gas with various, the technology has work Skill process is relatively easy, and energy consumption is relatively low, can remove and reclaim CO from synthetic-ammonia transformation gas₂.Low-temperature fractionation separation therein Technology be at low temperature by various components in gas according to technique and requiring that CO2 cools down, then will be wherein each with the way of distillation Class material is separated one by one according to the difference of evaporating temperature.This method CO suitable for natural gas₂、H₂S contents are higher, and With CO₂When carrying out 3 oil recoveries, CO in produced gas₂There is the situations such as larger fluctuation, technological equipment investment expense in content and flow Larger, energy consumption is higher.

So far, most CO₂Trapping technique even implements IGCC coal gasification, combustion still in development Gas-steam combined cycle power generating, CO₂Power plant is trapped compared with the power plant that trapping technique is not carried out, it is necessary to consume 10%~40% more The 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 CCS or The CO of 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 ground Environmental hazard caused by matter 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 is big, and has 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%、SO₂80~200mg/Nm³, 100~400mg/Nm of NOx³, 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 Raw material decomposes, fuel combustion and the CO of 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 Exceed 3,500,000,000 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 CO₂Subtract Row more highlights urgent and necessity, but because still missing is directed to the specific CO of cement kiln flue gas₂The research and development of trapping technique, add Existing CO₂The capacity limit that the high Cost Problems of trapping technique application can have been born far beyond cement production enterprise, and cement Produce because its kiln gas composition of its process characteristic and fluid properties are with coal chemical industry synthesis gas, natural gas, coal electricity flue gas There is significant difference to IGCC gas, it is low for this personal value（Cement price is low）The thin cement industry of profit, so far there is not yet any water CO in stall flue gas₂Trapping and the specific research of application technology and practice report.

Secondly, there is largely discarded waste heat, and the temperature of discarded waste heat is with original caused by continuing in cement production process The change fluctuation of combustible material and kiln system operating mode is big.Although the nearly all cement plant of policy energy-saving and emission-reduction is all built（Kiln tail） " preheater waste gas residual heat boiler+（Kiln hood）The electricity generation system of grate-cooler waste gas residual heat boiler ", what is typically utilized is kiln hood cooling 300~400 DEG C of the waste gas residual heat and the waste gas residual heat of more than 300 DEG C of preheater that machine middle-temperature section extracts, substantial amounts of 80 DEG C~300 DEG C waste gas residual heat can not utilize and directly empty and cause thermal pollution, meanwhile, also have substantial amounts of other high-temperature services radiation waste heat And the high temperature heat of high-temperature material causes the high temperature heat that some influence the adverse effects such as firer's condition, main such as manufacture of cement is set Standby-kiln head cover（Inner top causes ablation up to 800 DEG C to 1450 DEG C）, more than 1300 DEG C of clinker clinkering blizzard in grate-cooler People stops kiln, kiln tail preheater and enters the viscous stifled accident of 850 DEG C~950 DEG C high temperature skinning of kiln tremie pipe and rotary kiln shell（High temperature Section is up to 300 DEG C~500 DEG C, and low-temperature zone is up to 150 DEG C~300 DEG C）With kiln tail smoke-box（Smoke-box region internal temperature is up to 800~1200 ℃）Fusible skinning and high temperature heat radiation pollute, the existing waste heat boiler of high-temperature service in these manufacture of cement can not be direct It is that can reduce the strong heat radiation pollution of working environment and the spoke using these high-temperature services for producing high-temperature high-pressure steam Penetrate heat energy, Chinese patent ZL201420380874.X, ZL201420562882.6 disclosed in " using cylinder of rotary kiln radiate Heat energy supply cogeneration device " and ZL201420382011.6 disclosed in " using dry-process rotory kiln kiln head cover waste heat supply more than The device that heat generates electricity ", because preheating water for boiler and preheated air can only be used for, it is impossible to effectively solve the radiant heat profit of high-temperature service With and thermal pollution, and application can not be popularized, existing cement production enterprise is set in a row to prevent high temperature from causing rotary kiln to scrap Hair-dryer be rotary kiln standard configuration, with rows of hair drier it is lasting blow a cold wind over reduce rotary kiln trunk temperature, Not only increase power consumption also results in thermal pollution, and the increase of power consumption also increases carbon emission, and there is no both at home and abroad effectively to eliminate back so far Rotary kiln type high temp facility environment thermal pollution or the method for recycling rotary kiln high-temperature service radiation waste heat, can be effectively not sharp yet With the mode and equipment of a large amount of 80 DEG C~300 DEG C low temperature waste gas waste heats.

On the other hand, as the development of CCS technologies, supercritical carbon dioxide electricity generation system are a kind of with supercriticality Carbon dioxide has received significant attention for the Brayton Cycle system of working medium, and supercritical carbon dioxide electricity generation system mainly includes heat Source, high speed turbine, high-speed engine, high-speed compressor, cooler etc., its high-performance heat exchanger are supercritical generating system engineerings The basis of application.Circulatory mediator in its cyclic process is carbon dioxide, and in total recycle process, carbon dioxide is in super face Boundary's state, does not undergo phase transition, and cyclic process is that supercritical carbon dioxide boosts through compressor --- with the isobaric heating two of heat exchanger --- working medium enters turbo turbine acting drive motor and generates electricity --- working medium enters cooler --- again carbonoxide working medium Closed cycle is formed into compressor.The system thermal effect of the more traditional heat energy power-generating system of supercritical carbon dioxide electricity generation system Rate, gross weight and floor space, pollutant emission etc. show significant advantage, but its main movement equipment is all using height Fast gyration form, machining accuracy and material property control require high, and supercritical carbon dioxide Brayton cycle requires pressure Contracting machine parameter is near critical point, reduces heat exchange difference, and work done during compression still accounts for the 30% of turbine output during its compressor compresses More than, work done during compression still accounts for 40% to the 50% of turbine output, i.e. the compressor consumable of system in the compression process of practice Can be still higher.Heat exchange property mutation simultaneously for Near The Critical Point need to take into full account operation allowance, realize these target calls There is compact, efficient and reliable heat exchanger to carry out quick heat exchange, realize Low Temperature Difference high efficient heat exchanging.Existing overcritical dioxy The heat exchange for changing carbon experiment loop uses printed circuit platelet heat exchangers mostly（PCHE）, it is applied to elevated operating temperature and senior engineer Make pressure, and there is good extended capability, meet the requirement with the isobaric heating carbon dioxide working medium of heat exchanger, but mechanism is answered Miscellaneous, investment is big, and is objectively difficult in adapt to China's major part quality coal in cement kiln systems and discards waste heat supply temperature with raw materials and fuel and kiln system The big situation of fluctuation of operating conditions.Furthermore the high efficiency of its system circulation need to be established in CO2 cooler outlets i.e. compressor suction inlet （Loop start）Carbon dioxide still in 32 DEG C, the critical points of 7.4MPa supercriticalities, supercritical carbon dioxide generates electricity System running state control difficulty is big, it is still necessary to carries out control research.

According to China《Cement》（2014.No.9）《Utilize CO₂The cement afterheat generation system of power cycle》The U.S. of introduction During Ohio Akron city Echogen companies are extracted using the waste gas residual heat and chamotte cooler of cement plant preheater discharge CO is applied in warm waste gas residual heat design₂Power cycle afterheat generating system（Generated electricity using the waste gas residual heat of China's cement production enterprise Thermal source, but working media is different）, the waste heat exchanger of the currently available EPS100 8MW heat engine systems of Echogen companies North America region investment up to 2000~25,000,000 dollars, far above the investment of domestic 8MW double boilers the whole series afterheat generating system Total value（The waste gas residual heat boiler electricity generation system gross investment of the waste gas residual heat boiler and chamotte cooler of domestic cement plant preheater 4000~60,000,000 yuans）, and be objectively difficult in adapt to China's major part quality coal in cement kiln systems discard waste heat supply temperature with Raw materials and fuel and the big situation of kiln system fluctuation of operating conditions, and high-performance heat exchanger is the basis of supercritical generating system engineering application. Furthermore China's cement production enterprise has been popularized the medium temperature that the waste gas residual heat boiler for having built up preheater discharge and chamotte cooler extract and given up Gas afterheat boiler electricity-generating system（Water working media）, identical thermal source is with taking the system of dismounting Low investment to change in the case of output System with high investment, lack actuality under national conditions.Obviously, existing CO₂Power generation technology is not appropriate for China's national situation Cement industry.

In summary, titled with China's cement production enterprise of " high pollution high energy consumption " cap, reduce in production process to extraneous energy Consumption（Electricity, coal）Demand, reduce environmental contaminants discharge be necessary.How China cement production enterprise present situation, low throwing are adapted to Money is adapted to cement kiln flue gas CO using a large amount of caused discarded waste heats, exploitation in cement production process₂Trap and be applied to The change system of generating, energy-saving and emission-reduction and the carbon dioxide discharge-reduction of manufacture of cement are realized, be a real pressing problem.

Utility model content

Technical problem to be solved in the utility model is to provide one kind and utilizes cement producing line technological equipment feature, with All kinds of discarded waste heats that caused temperature fluctuation is big in cement production process, the temperature difference is big are main energy sources and low, investment of consuming energy certainly The device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas low, operating cost is low.

Technical scheme is used by the utility model solves its technical problem：One kind is adapted to dioxy in cement kiln flue gas Change the device that carbon is continuously trapped and generated electricity, mainly include tail exhaust blower, electric three passes air-valve, chimney, flue gas oxidation, purification device, film Separator, cooler, flue gas compressor, CO₂Circularly trapping tower, energy strorage by using residual heat device, dewatering dryer, CO₂Cooler, CO₂ Compressor, liquefaction CO₂Storage tank, CO₂High-pressure pump, CO₂Energy storage equipment, flow straightener, turbine, generator and regenerator, it is described electronic Three-way air valve is located on the flue between the tail exhaust blower and chimney being connected with kiln tail deduster, and the tail exhaust blower goes out Gas port is connected with the air inlet of Electric air valve, and the flue gas of the first row gas port and flue gas oxidation, purification device of electric three passes air-valve enters Mouth is connected, and the second exhaust port of electric three passes air-valve is connected with chimney, the clean gas outlet of the flue gas oxidation, purification device It is connected with the gas feed of membrane separation device, the rich N of the membrane separation device₂Outlet is connected with chimney, the UF membrane The rich CO of device₂Outlet is connected with cooler gas import, and the cooler gas outlet is connected with flue gas compressor import It is logical, the flue gas compressor outlet and CO₂Circularly trapping tower air inlet pipe road junction is connected, the CO₂The rich N of circularly trapping tower₂Row Go out pipe outlet with chimney to be connected, the CO₂The CO of circularly trapping tower₂Discharge line exports and dewatering dryer gas feed It is connected, the CO₂The heat exchanging pipe import of circularly trapping tower is connected with the medium pipeline outlet of energy strorage by using residual heat device, institute State medium pipeline import and the CO of energy strorage by using residual heat device₂The heat exchanging pipe outlet of circularly trapping tower is connected, and the dehydration is dry Dry device gas vent and CO₂Cooler gas import is connected, CO₂Cooler outlet and CO₂Compressor inlet is connected, CO₂Pressure Contracting machine exports and liquefaction CO₂Storage tank import, regenerator high pressure CO₂Fluid inlet is connected, regenerator high pressure CO₂Fluid issuing with CO₂Energy storage equipment import is connected, CO₂Energy storage equipment outlet is connected with the import of flow straightener, and flow straightener outlet and turbine are high Inlet communication is pressed, turbine is connected with generator shaft, and turbine low tension outlet connects with regenerator low pressure inlet, regenerator low pressure Outlet and CO₂Cooler inlet connects, and liquefy CO₂Outlet and CO₂High pressure pump inlet is connected, CO₂High pressure pump outlet and CO₂ Energy storage equipment import is connected.

Further, described flue gas oxidation, purification device is contained SO in removing cement kiln flue gas₂、NO_x, chloride, fluorination Thing, hydrocarbon, heavy metal and dust pollution thing and purification separation solid waste and the device of clean gas, including oxidation, purification and water Qi leel is from agent set, oxidizing decontamination agent atomizing sprayer, scavenging solution circulating sprayer, sewage purification separator, institute State oxidizing decontamination agent atomizing sprayer and separate agent set top with oxidation, purification with aqueous vapor and be connected, the scavenging solution circulation Spray equipment is separated with oxidation, purification with aqueous vapor in the middle part of agent set and sewage purification separator is connected, the sewage purification The bottom that separator separates agent set with oxidation, purification with aqueous vapor is connected, and it is net that sewage purification separator isolates flue gas Solids caused by change simultaneously purifies reusing sewage.

Further, described membrane separation device is N₂/CO₂Membrane separation device, using the blast of tail exhaust blower air blast transmission as just Pressure, using the negative-pressure ward masterpiece of chimney as rich N₂The power of side, using the negative-pressure ward masterpiece of flue gas compressor as rich CO₂Side Power.

Further, described CO₂Energy storage equipment refers to CO₂For the kiln head cover in the direct accumulation cement production process of working medium （700 DEG C~1500 DEG C）And in grate-cooler（200 DEG C~1350 DEG C）Heat energy and/or kiln tail smoke-box（800 DEG C~1200 DEG C）Heat energy And/or in preheater tremie pipe（800 DEG C~950 DEG C）Heat energy and/or rotary kiln high temperature trunk（300 DEG C~500 DEG C）Radiant heat And/or high temperature waste gas residual heat（300 DEG C~400 DEG C）To supercritical CO₂Fluid accumulation of energy.

Further, described CO₂Circularly trapping tower is 2 more parallels to meet kiln gas CO₂Trapping ability, or 2 Series connection is with the CO of further purification trapping above₂, or in parallel+be used in series.

Further, described CO₂Energy storage equipment is 2 sets of more parallels or series connection, or in parallel+be used in series.

Further, described liquefaction CO₂Storage tank, CO₂Cooler, CO₂Compressor is 2 more parallel or is used in series, or It is in parallel+to be used in series.

The utility model utilizes cement production process technological equipment feature, is discharged for existing cement producing line kiln exit gas It is the situation first after kiln tail dust-precipitator gathers dust, then through the high chimney high altitude discharge of tail exhaust blower, flue more than 70 rice of feeding, in tail Electric air valve is set on flue between exhaust blower and chimney, first connected flue gas with the power of the tail exhaust blower of normal operation It is continuous to be sent into flue gas cleaner removing flue gas the pollutant being harmful to, and utilize the blast and existing 70 of tail exhaust blower air blast transmission Negative-pressure ward power caused by the negative-pressure ward power of the high chimney self-assembling formation of remaining rice and necessary cooling and compression solves film point From CO₂/N₂Required power consumption；With the CO of enrichment₂Continuous source of the gas is as CO₂Trapping object, trapping difficulty is greatly reduced, Efficiently to trap CO from relatively inexpensive hydrate or physical-chemical absorption method₂Condition is provided with trapping cost is reduced； Furthermore it is used as CO using a large amount of middle-low temperature heats of the continuous accumulation cement producing line of energy strorage by using residual heat device₂Trapping tower unit is continuously caught Collect CO₂Main energy sources, and with CO₂High temperature heat energy in the direct accumulation clinker production process of energy storage equipment is as supercritical CO₂ The energy of generating, and resolved with stable current regulator and fluctuated and temperature fluctuation and different CO with kiln condition using in manufacture of cement₂Store The supercritical CO of different temperatures difference energy storage density caused by energy device₂Fluid is unfavorable for the problem of stable electric generation.

The beneficial effects of the utility model：

1）With reference to cement producing line technological equipment feature, creative develops a kind of cement kiln flue gas CO₂Continuous trapping And supercritical CO₂The change system of generating, equipment is simpler, and investment is small, industrially applicable.

2）The a large amount of waste heats discarded by the use of cement producing line are used as CO₂The energy of trapping, and using in cement production process The installations and facilities of the existing normal operation such as high chimney of kiln tail blower fan, more than 70 rice, and made using its normal power consumption For major impetus so that cement kiln flue gas CO₂Trap whole change system and increase that energy consumption is extremely low, and operation cost is low newly, breach existing There are CCS technological systems to include CO in IGCC system₂The with high investment of trapping, high energy consumption, the bottleneck of high cost, are also breached with cement Kiln condition is fluctuated and temperature fluctuation and different waste heat supply temperature differences are difficult in adapt in need to use the isobaric heating carbon dioxide working medium of heat exchanger Requirement.

3）Demand of the manufacture of cement to extraneous zero power consumption can be achieved, the circulation for realizing " 401 is negative " beneficial to cement production enterprise passes through Ji target.

4）Waste gas, waste water, used heat and dust pollution to caused by environment can be greatly decreased in cement production process, it is effectively real The effective emission reduction and low-carbon production of existing manufacture of cement.

Brief description of the drawings

Fig. 1 is the schematic device that the utility model is adapted to that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas.

Fig. 2 is adapted to cement kiln flue gas for one kind and contains 2 sets of CO₂The trapping in parallel of circularly trapping tower, 2 sets of CO₂Energy storage equipment is simultaneously The schematic device that connection application generates electricity.

Fig. 3 is adapted to cement kiln flue gas for one kind and contains 2 sets of CO₂Circularly trapping tower series connection trapping, 2 sets of CO₂Energy storage equipment is simultaneously The schematic device that connection application generates electricity.

Fig. 4 is a kind of CO for cancelling gas cleaning and membrane separation device₂Continuous trapping and CO₂The schematic device of generating.

Fig. 5 is a kind of double-tower type CO₂The structural representation of circularly trapping tower.

Fig. 6 is a kind of continous way CO₂The structural representation of absorption tower-regenerator.

In figure：1- tail exhaust blowers, 2- electric three passes air-valves, 3- chimneys, 4- flue gas oxidation, purification devices, 401- oxidation, purifications with Aqueous vapor separation agent set, 402- oxidizing decontamination agent atomizing sprayers, 403- scavenging solution circulating sprayers, 404- sewage are net Change separator, 5- membrane separation devices, 6- coolers, 7- flue gas compressors, 8-CO₂Circularly trapping tower, the CO of 8 ˊ-the two₂Circulation is caught Ji Ta, 9- energy strorage by using residual heat device, 9A- head last person's gas energy storage equipments, 9B- kiln tail gas energy storage equipments, 9C- kiln shells accumulation of energy dress Put, 9D- head waste air energy storage equipments, 10- dewatering dryers, 11-CO₂Cooler, 12-CO₂Compressor, 13- liquefaction CO₂Storage tank, 14-CO₂High-pressure pump, 15-CO₂Energy storage equipment, 15A- kiln tail smoke-boxes CO₂Energy storage equipment, 15B- kiln head covers CO₂Energy storage equipment, 15C- Preheater expects pipe CO₂Energy storage equipment, CO built in 15D- grate-coolers₂Energy storage equipment, 16- flow straighteners, 17- turbines, 18- regenerators, 19- generators.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Embodiment 1

Reference picture 1, one kind are adapted to CO in cement kiln flue gas₂Continuous trapping and CO₂The device of generating, mainly include tail and arrange Blower fan 1, electric three passes air-valve 2, chimney 3, flue gas oxidation, purification device 4, membrane separation device 5, cooler 6, flue gas compressor 7, CO₂ Circularly trapping tower 8, energy strorage by using residual heat device 9, dewatering dryer 10, CO₂Cooler 11, CO₂Compressor 12, liquefaction CO2 storage tanks 13, CO₂High-pressure pump 14, CO₂Energy storage equipment 15, flow straightener 16, turbine 17, regenerator 18 and generator 19, the electric three passes wind Valve 2 is located on the flue between the tail exhaust blower 1 and chimney 3 being connected with kiln tail deduster, the outlet of the tail exhaust blower 1 Mouth is connected with the air inlet of electric three passes air-valve 2, first row gas port and the flue gas oxidation, purification device of the electric three passes air-valve 2 4 gas approach is connected, and the second exhaust port of the electric three passes air-valve 2 is connected with chimney 3；The flue gas oxidation, purification The gas feed of the clean gas outlet of device 4 and membrane separation device 5 is connected, the rich N of the membrane separation device 5₂Outlet and chimney 3 It is connected, the rich CO of the membrane separation device 5₂Outlet is connected with the gas feed of cooler 6, the gas vent of cooler 6 It is connected with the import of flue gas compressor 7, the flue gas compressor 7 exports and CO₂The air inlet pipe road junction of circularly trapping tower 8 is connected, The CO₂The rich N of circularly trapping tower 8₂Discharge line outlet is connected with chimney 3, the CO₂The CO of circularly trapping tower 8₂Discharge Pipe outlet is connected with the gas feed of dewatering dryer 10, the CO₂The heat exchanging pipe import of circularly trapping tower 8 and waste heat The medium pipeline outlet of energy storage equipment 9 is connected, the medium pipeline import of the energy strorage by using residual heat device 9 and CO₂Circularly trapping tower 8 Heat exchanging pipe outlet be connected；The gas vent of dewatering dryer 10 and CO₂The gas feed of cooler 11 is connected, CO₂ Cooler 11 exports and CO₂The import of compressor 12 is connected, CO₂Compressor 12 exports and liquefaction CO₂The import of storage tank 13, regenerator 18 high pressure COs₂Fluid inlet is connected, the high pressure CO of regenerator 18₂Fluid issuing and CO₂The import of energy storage equipment 15 is connected, CO₂Store The outlet of energy device 15 is connected with the import of flow straightener 16, and the outlet of flow straightener 16 connects with the high-pressure inlet of turbine 17, turbine 17 are connected with generator 19, and the low tension outlet of turbine 17 connects with the low pressure inlet of regenerator 18, the low tension outlet of regenerator 18 and CO₂ The inlet communication of cooler 11, liquefy CO₂Storage tank 13 exports and CO₂The import of high-pressure pump 14 is connected, CO₂High-pressure pump 14 exports and CO₂ The import of energy storage equipment 15 is connected.

Described flue gas oxidation, purification device 4 is contained SO in removing cement kiln flue gas₂、NO_x, chloride, fluoride, carbon Hydrogen compound, heavy metal and dust pollution thing and purification separation solid waste and the device of clean gas, including oxidation, purification and aqueous vapor point From agent set 401, oxidizing decontamination agent atomizing sprayer 402, scavenging solution circulating sprayer 403, sewage purification separation dress 404 are put, the oxidizing decontamination agent atomizing sprayer 402 separates the top of agent set 401 with oxidation, purification with aqueous vapor and is connected, The scavenging solution circulating sprayer 403 separates the middle part of agent set 401 with oxidation, purification with aqueous vapor and sewage purification separates dress Put 404 to be connected, the bottom that the sewage purification separator 404 separates agent set 401 with oxidation, purification with aqueous vapor is connected Logical, the sewage purification separator 404 isolates solids caused by gas cleaning and purifies reusing sewage.

Described membrane separation device 5 is N₂/CO₂Membrane separation device, using the blast of the air blast transmission of tail exhaust blower 1 as normal pressure, Using the negative-pressure ward masterpiece of chimney 3 as rich N₂The power of side, using the negative-pressure ward masterpiece of flue gas compressor 7 as rich CO₂Move side Power.

Described CO₂Circularly trapping tower 8, with caused waste heat in the accumulation cement production process of energy strorage by using residual heat device 9 As the energy, circulation, which is caught, to be released, separates the rich N of discharge₂Air-flow and pure CO₂Air-flow；Described energy strorage by using residual heat device 9 refers to can accumulation cement The energy storage equipment of caused waste gas residual heat in production process.

Described CO₂Energy storage equipment 15 refers to CO₂For the kiln head cover in the direct accumulation cement production process of working medium（700 DEG C~ 1500℃）And in grate-cooler（200 DEG C~1350 DEG C）Heat energy and/or kiln tail smoke-box（800 DEG C~1200 DEG C）Heat energy and/or preheating In device tremie pipe（800 DEG C~950 DEG C）Heat energy and/or rotary kiln high temperature trunk（300 DEG C~500 DEG C）Radiant heat and/or middle height Warm waste gas residual heat（300 DEG C~400 DEG C）To supercritical CO₂Fluid accumulation of energy.

Embodiment 2

Reference picture 2, one kind are adapted to cement kiln flue gas and contain 2 sets of CO₂The trapping in parallel of circularly trapping tower, 2 sets of CO₂Energy storage equipment The device that parallel connection application generates electricity, mainly includes tail exhaust blower 1, electric three passes air-valve 2, chimney 3, flue gas oxidation, purification device 4, film point From device 5, cooler 6, flue gas compressor 7, CO₂Circularly trapping tower 8, the 2nd CO₂The ˊ of circularly trapping tower 8, head last person's gas accumulation of energy dress Put 9A, kiln tail gas energy storage equipment 9B, dewatering dryer 10, CO₂Cooler 11, the 2nd CO₂Cooler 11 ˊ, CO₂Compressor 12, 2nd CO₂The ˊ of compressor 12, the 13, second liquefaction CO2 of liquefaction CO2 storage tanks storage tanks 13 ˊ, CO₂High-pressure pump 14, kiln tail smoke-box CO₂Accumulation of energy Device 15A, kiln head cover CO₂Energy storage equipment 15B, flow straightener 16, turbine 17, regenerator 18 and generator 19, described electronic three Ventilation valve 2 is located on the flue between the tail exhaust blower 1 and chimney 3 being connected with kiln tail deduster, the tail exhaust blower 1 Gas outlet is connected with the air inlet of electric three passes air-valve 2, and the first row gas port of the electric three passes air-valve 2 and flue gas oxidation are net The gas approach for changing device 4 is connected, and the second exhaust port of the electric three passes air-valve 2 is connected with chimney 3, the flue gas oxidation The gas feed of the clean gas outlet of clarifier 4 and membrane separation device 5 is connected, the rich N of the membrane separation device 5₂Gas goes out Mouth is connected with chimney 3, the rich CO of the membrane separation device 5₂Gas vent is connected with the gas feed of cooler 6, described cold But the gas vent of device 6 is connected with the import of flue gas compressor 7, and the flue gas compressor 7 exports and CO₂Circularly trapping tower 8, second CO₂The ˊ air inlet pipe road junction of circularly trapping tower 8 is connected, the CO₂The rich N of circularly trapping tower 8₂Gas outlet pipe road exports and chimney 3 and the 2nd CO₂The ˊ of circularly trapping tower 8 rich N₂The outlet of gas outlet pipe road is connected, the CO₂The CO of circularly trapping tower 8₂Gas Discharge line exports and the import of dewatering dryer 10 and the 2nd CO₂The ˊ of circularly trapping tower 8 CO₂Gas outlet pipe road exit gas phase Connection, the CO₂The heat exchanging pipe import of circularly trapping tower 8 is connected with head last person's gas energy storage equipment 9A medium pipeline outlet It is logical, the medium pipeline import of the head last person gas energy storage equipment 9A and CO₂The heat exchanging pipe outlet of circularly trapping tower 8 is connected It is logical, the 2nd CO₂The ˊ of circularly trapping tower 8 heat exchanging pipe import exports with kiln tail gas energy storage equipment 9B medium pipeline It is connected, medium pipeline import and the 2nd CO of the kiln tail gas energy storage equipment 9B₂The ˊ of circularly trapping tower 8 heat exchanging pipe Outlet is connected, the gas vent of dewatering dryer 10 respectively with CO₂The gas feed of cooler 11, the 2nd CO₂The ˊ of cooler 11 Gas feed is connected, the CO₂Cooler 11 exports and CO₂The import of compressor 12 is connected, the CO₂Compressor 12 exports Respectively with liquefy CO₂The import of storage tank 13, the high-pressure fluid inlet communication of regenerator 18, the 2nd CO₂The ˊ gas vents of cooler 11 are distinguished With CO₂The import of cooler 11 and the 2nd CO₂The ˊ inlet communications of compressor 12, the 2nd CO₂The ˊ of compressor 12 is exported and the second liquefaction CO2 The ˊ inlet communications of storage tank 13, the liquefaction CO₂Storage tank 13 exports and CO₂The import of high-pressure pump 14 is connected, the CO₂High-pressure pump 14 goes out Mouthful and the high pressure fluid output of regenerator 18 respectively with kiln tail smoke-box CO₂Energy storage equipment 15A imports, kiln head cover CO₂Energy storage equipment 15B Inlet communication, the kiln tail smoke-box CO₂Energy storage equipment 15A outlets, kiln head cover CO₂Energy storage equipment 15B outlet respectively with flow straightener 16 Inlet communication, the flow straightener 16 outlet connected with the entrance of turbine 17, and the turbine 17 is connected with generator 19, with more than The CO of heat₂After regenerator 18 carries out heat exchange, into CO₂Cooler 11 circulates.

Described CO₂Circularly trapping tower 8, the 2nd CO₂The ˊ of circularly trapping tower 8 is respectively by head last person's gas energy storage equipment 9A, kiln tail Energy needed for waste gas energy storage equipment 9B offers, the head last person gas energy storage equipment 9A, kiln tail gas energy storage equipment 9B are stored with waste heat Caused waste gas residual heat in the mode accumulation cement production process of energy（100 DEG C~400 DEG C）And radiant heat（150 DEG C~500 DEG C） As continous way CO₂Trap the energy of heat-exchange device in tower.

Described CO₂Circularly trapping tower 8, the 2nd CO₂The ˊ of circularly trapping tower 8 is arranged in parallel, and can double rich CO₂The place of flue gas Reason amount, effectively improves CO₂Collection efficiency.

Described kiln tail smoke-box CO₂Energy storage equipment 15A, kiln head cover CO₂Energy storage equipment 15B is arranged in parallel, and improves manufacture of cement The residual heat collection of line, improve energy recovery utilization rate.

Embodiment 3

Reference picture 3, containing 2 sets of CO₂The series connection of circularly trapping tower is adapted to CO in cement kiln flue gas₂The continuous dress for trapping and generating electricity Standby system, mainly include tail exhaust blower 1, electric three passes air-valve 2, chimney 3, flue gas oxidation, purification device 4, membrane separation device 5, cooling Device 6, flue gas compressor 7, CO₂Circularly trapping tower 8, the 2nd CO₂The ˊ of circularly trapping tower 8, kiln shell energy storage equipment 9C, head waste air store Can device 9D, dewatering dryer 10, CO₂Cooler 11, CO₂Compressor 12, liquefaction CO₂Storage tank 13, CO₂High-pressure pump 14, preheater Expect CO₂CO built in energy storage equipment 15C, grate-cooler₂Energy storage equipment 15D, flow straightener 16, turbine 17, generator 19 and regenerator 18, the electric three passes air-valve 2 is placed on the flue between the tail exhaust blower 1 and chimney 3 being connected with kiln tail deduster, institute The gas outlet for stating tail exhaust blower 1 is connected with the air inlet of electric three passes air-valve 2, the first exhaust of the electric three passes air-valve 2 Mouth is connected with the gas approach of flue gas oxidation, purification device 4, and the second exhaust port of the electric three passes air-valve 2 is connected with chimney 3 Logical, the gas feed of the clean gas outlet and membrane separation device 5 of the flue gas oxidation, purification device 4 is connected, the UF membrane dress Put 5 rich N₂Gas vent is connected with chimney 3, the rich CO of the membrane separation device 5₂Gas vent and the gas feed of cooler 6 It is connected, the gas vent of cooler 6 is connected with the import of flue gas compressor 7, and the flue gas compressor 7 exports and CO₂Circulation is caught Collection tower 8 air inlet pipe road junction is connected, CO₂The rich N of circularly trapping tower 8₂Gas outlet pipe road exports and the CO of chimney 3 and the 2nd₂Circulation Trap the ˊ of tower 8 pure N₂The outlet of gas outlet pipe road is connected, CO₂The CO of circularly trapping tower 8₂Gas outlet pipe road exports and second CO₂The ˊ air inlet pipe road junction of circularly trapping tower 8 is connected, the 2nd CO₂The ˊ of circularly trapping tower 8 CO₂Gas outlet pipe road exit gas with The import of dewatering dryer 10 is connected, the CO₂The heat exchanging pipe import of circularly trapping tower 8 is with kiln shell energy storage equipment 9C's Medium pipeline outlet is connected, kiln shell energy storage equipment 9C medium pipeline import and CO₂The heat exchanging pipe of circularly trapping tower 8 Outlet is connected, the 2nd CO₂The ˊ heat exchanging pipes import of circularly trapping tower 8 and head waste air energy storage equipment 9D medium tube Road outlet is connected, head waste air energy storage equipment 9D medium pipeline import and the 2nd CO₂The ˊ of circularly trapping tower 8 heat-exchange tube Road outlet is connected, the gas vent of dewatering dryer 10 and CO₂The gas feed of cooler 11 is connected, CO₂Cooler 11 export with CO₂The import of compressor 12 is connected, CO₂Compressor 12 export respectively with liquefy CO₂The import of storage tank 13, the high-pressure fluid of regenerator 18 Import is connected, and liquefy CO₂Storage tank 13 exports and CO₂The import of high-pressure pump 14 is connected, CO₂High-pressure pump 14 exports, regenerator 18 is high Press fluid issuing respectively with preheater expects pipe CO₂CO built in energy storage equipment 15C imports, grate-cooler₂Energy storage equipment 15D imports connect It is logical, preheater expects pipe CO₂CO built in energy storage equipment 15C outlets, grate-cooler₂Energy storage equipment 15D outlet respectively with flow straightener 16 Inlet communication, the outlet of flow straightener 16 and the inlet communication of turbine 17, the turbine 17 generates electricity with generator 19, with waste heat CO₂After regenerator 18 carries out heat exchange, into CO₂Cooler 11 circulates.

Described CO₂Circularly trapping tower 8, the 2nd CO₂The ˊ of circularly trapping tower 8 is individually by kiln shell energy storage equipment 9C, head Waste air energy storage equipment 9D provides CO₂Energy needed for collection.

Described CO₂Circularly trapping tower 8, the 2nd CO₂The ˊ arranged in series of circularly trapping tower 8, can effectively improve CO₂Collect Purity.

Described preheater expects pipe CO₂CO built in energy storage equipment 15C, grate-cooler₂Energy storage equipment 15D is arranged in parallel, to improve The residual heat collection of cement producing line, improve energy recovery utilization rate.

Embodiment 4

Reference picture 4, a kind of CO for cancelling gas cleaning and membrane separation device₂The continuous device for trapping and generating electricity；Main bag Include tail exhaust blower 1, electric three passes air-valve 2, chimney 3, cooler 6, flue gas compressor 7, CO₂Circularly trapping tower 8, the 2nd CO₂Circulation Trap the ˊ of tower 8, kiln tail gas energy storage equipment 9B, head waste air energy storage equipment 9D, dewatering dryer 10, CO₂Cooler 11, CO₂Pressure Contracting machine 12, liquefaction CO₂Storage tank 13, CO₂High-pressure pump 14, preheater expects pipe CO₂Energy storage equipment 15C, kiln tail smoke-box CO₂Energy storage equipment 15A, flow straightener 16, turbine 17 and regenerator 18, the electric three passes air-valve 2 are located at the tail air draft being connected with kiln tail deduster On flue between machine 1 and chimney 3, the gas outlet of tail exhaust blower 1 is connected with the air inlet of electric three passes air-valve 2, electricity The first row gas port of dynamic three-way air valve 2 is connected with chimney 3, the second exhaust port of electric three passes air-valve 2 and the import of cooler 6 It is connected, the gas vent of cooler 6 is connected with the import of flue gas compressor 7, and flue gas compressor 7 exports and CO₂Circularly trapping tower 8 Air inlet pipe road junction is connected, CO₂The rich N of circularly trapping tower 8₂Gas outlet pipe road exports and the CO of chimney 3 and the 2nd₂Circularly trapping The ˊ of tower 8 pure N₂The outlet of gas outlet pipe road is connected, CO₂The CO of circularly trapping tower 8₂Gas outlet pipe road exports and the 2nd CO₂ The ˊ air inlet pipe road junction of circularly trapping tower 8 is connected, the 2nd CO₂The ˊ of circularly trapping tower 8 CO₂Gas outlet pipe road exit gas is with taking off The import of water drier 10 is connected, CO₂The heat exchanging pipe import of circularly trapping tower 8 and kiln tail gas energy storage equipment 9B medium Pipe outlet is connected, kiln tail gas energy storage equipment 9B medium pipeline import and CO₂The heat-exchange tube of circularly trapping tower 8 is said Mouth is connected, the 2nd CO₂The ˊ of circularly trapping tower 8 heat exchanging pipe import and head waste air energy storage equipment 9D medium tube are said Mouth is connected, head waste air energy storage equipment 9D medium pipeline import and the 2nd CO₂The ˊ of circularly trapping tower 8 heat-exchange tube is said Mouth is connected, the gas vent of dewatering dryer 10 and CO₂The gas feed of cooler 11 is connected, CO₂Cooler 11 exports and CO₂ The import of compressor 12 is connected, CO₂Compressor 12 export respectively with liquefy CO₂The import of storage tank 13, the high-pressure fluid import of regenerator 18 It is connected, liquefy CO₂Storage tank 13 exports and CO₂The import of high-pressure pump 14 is connected, CO₂High-pressure pump 14 exports, the high-pressure spray of regenerator 18 Body outlet respectively with preheater expects pipe CO₂Energy storage equipment 15C imports, kiln tail smoke-box CO₂Energy storage equipment 15A inlet communications, preheater Expects pipe CO₂Energy storage equipment 15C outlets, kiln tail smoke-box CO₂Energy storage equipment 15A exports the inlet communication with flow straightener 16 respectively, current stabilization Device 16 exports and the inlet communication of turbine 17, HTHP CO₂Generating set 19 is driven to generate electricity by turbine 17, with waste heat CO₂After regenerator 18 carries out heat exchange, circulated into CO2 coolers 11.

In various embodiments above, the CO₂Circularly trapping tower is double-tower type CO₂Circularly trapping tower, as shown in figure 5, by structure Identical CO₂Circularly trapping device I A, CO₂The B of circularly trapping device II is in parallel to be formed, the CO₂The A of circularly trapping device I includes gas-liquid separation The A1 of device I, the A2 of trapping agent atomizing sprayer I, silk screen trapping bed I A3, the A4 of heat-exchange device I, flue gas enter and distribution device I A5, rich N₂Discharger I A6, CO₂The A7 of the discharger I and A8 of temperature and pressure induction installation I, the A1 of gas-liquid separator I, trapping agent mist Change the A2 of spray equipment I and be located at CO₂The A tops of circularly trapping device I, the silk screen trapping A3 of bed I are located at CO₂In the middle part of the A of circularly trapping device I, The A4 of heat-exchange device I is located at CO₂The A bottoms of circularly trapping device I, the flue gas enters is located at CO with the A5 of distribution device I₂Circulation The A bottoms of trap I, the rich N₂Discharger I A6, CO₂The A7 of discharger I and the A8 of temperature and pressure induction installation I are located at CO₂Circulation is caught At the top of the A of storage I, the CO₂The B of circularly trapping device II includes the B1 of gas-liquid separator II, the B2 of trapping agent atomizing sprayer II, silk screen The B3 of bed II, the B4 of heat-exchange device II, flue gas is trapped to enter and the B5 of distribution device II, rich N₂Discharger II B6, CO₂Discharger II B7 and temperature and pressure induction installation II B8, the CO₂Circulation, which is caught, releases the A of device I and the related device synchronism switching of releasing the B of device II is caught in circulation, Realize flue gas stream from CO₂The gas approach house steward of circularly trapping tower continuously enters, rich N₂Air-flow and CO₂Air-flow is vented from corresponding The continuous discharge in house steward outlet.

In various embodiments above, the CO₂Circularly trapping tower can be continous way CO₂Absorption tower-regenerator, as shown in fig. 6, Including continous way CO₂Absorption tower P, regenerator R, cold heat liquid heat exchanger S, continous way CO₂Absorption tower P and regenerator R pass through cold heat Liquid heat exchanger S-phase connects, continous way CO₂The cold rich solution continuously discharged in the P of absorption tower passes through with the hot lean solution continuously discharged in regenerator R After cold heat liquid heat exchanger S heat exchanges, the rich solution of preheating is sent into regenerator R and discharges CO₂, the lean solution to cool sends CO back to₂Inhale Receive and continue to absorb the CO in flue gas in tower P₂, CO₂Trapping agent is in continous way CO₂Continuously circulated in absorption tower P and regenerator R；

Described continous way CO₂Absorption tower P mainly includes gas distribution and drainage structure P1, cooling device P2, silk screen trapping bed III P3, the P4 of trapping agent atomizing sprayer III, liquid-gas separation device P5, rich N₂The tapping equipment P6 and P7 of temperature and pressure induction installation III, The gas distribution is located at absorption tower P bottom, with being connected in the P of absorption tower, the rich N with drainage structure P1₂Tapping equipment P6, temperature The pressure P7 of induction installation III is fixed on absorption tower P top, and with being connected in the P of absorption tower, the cooling device P2 is fixed on absorption Bottom in tower P, during silk screen trapping bed III P3, the P4 of trapping agent atomizing sprayer III are sequentially fixed in the P of absorption tower Portion, the liquid-gas separation device P5 are fixed on the topmost in the P of absorption tower；The flue gas is pressed into through gas distribution and drainage structure P1 CO₂The P3 of the bed III and P4 of trapping agent atomizing sprayer III is trapped in the P of absorption tower through apparatus for supercooling P2, silk screen successively upwards to spray Trapping agent liquid inversely exchange, the CO in flue gas₂Chemically react to form CO with hydration trapping agent liquid₂Hydrate, and heat is released, Hydration reaction liberated heat is removed through cooling device, the rich N of surplus₂Gas continues up removes liquid through liquid-gas separation device P5 After body, through rich N₂Tapping equipment P6 is discharged；

Described regenerator R is two-stage decarbonization device, is mainly followed including decarburization spray equipment R1, heater R2, decarburization Ring spray shower device R3, liquid-gas separation device R4, mesh mist eliminator R5, CO₂Output mechanism R6 and temperature and pressure induction installation IV R7, it is described CO₂Output mechanism R6, the R7 of temperature and pressure induction installation IV are fixed on regenerator R top, with being connected in regenerator R, the silk screen Demister R5, liquid-gas separation device R4 are sequentially fixed at the top in regenerator R, the decarburization spray equipment R1 and decarburization circulation Spray equipment R3 is fixed on the top in regenerator R, and the heater R2 is fixed on the middle part in regenerator R, carrys out self-absorption Heated in the first order decarbonization device that tower P rich solution is continuously sprayed into regenerator R through decarburization spray equipment R1 by heater R2 Discharge big portion CO₂Switch to semi lean solution, semi lean solution connects from the discharge of the bottom of first order decarbonization device through carbon cycle spray equipment R3 Continue in the second level decarbonization device in regenerator R and CO is discharged by heater R2 heating₂Switch to lean solution, lean solution is from the second level After the bottom discharge of decarbonization device after cold heat liquid heat exchanger S coolings, continuously sprayed into through the P4 of trapping agent atomizing sprayer III CO₂CO is caught in the P of absorption tower₂。

Claims

1. a kind of be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas, it is characterised in that mainly includes Tail exhaust blower, electric three passes air-valve, chimney, flue gas oxidation, purification device, membrane separation device, cooler, flue gas compressor, CO₂Follow Ring trapping tower, energy strorage by using residual heat device, dewatering dryer, CO₂Cooler, CO₂Compressor, liquefaction CO₂Storage tank, CO₂High-pressure pump, CO₂ Energy storage equipment, flow straightener, turbine, generator and regenerator, the electric three passes air-valve are located at what is be connected with kiln tail deduster On flue between tail exhaust blower and chimney, the gas outlet of the tail exhaust blower is connected with the air inlet of Electric air valve, The first row gas port of electric three passes air-valve is connected with the gas approach of flue gas oxidation, purification device, the second row of electric three passes air-valve Gas port is connected with chimney, and the clean gas outlet of the flue gas oxidation, purification device is connected with the gas feed of membrane separation device, The rich N of the membrane separation device₂Outlet is connected with chimney, the rich CO of the membrane separation device₂Outlet and cooler gas import It is connected, the cooler gas outlet is connected with flue gas compressor import, the flue gas compressor outlet and CO₂Circulation is caught Collection tower air inlet pipe road junction is connected, the CO₂The rich N of circularly trapping tower₂Discharge line outlet is connected with chimney, the CO₂Follow Ring traps the CO of tower₂Discharge line outlet is connected with dewatering dryer gas feed, the CO₂The heat exchange of circularly trapping tower Conduit entrance is connected with the medium pipeline outlet of energy strorage by using residual heat device, the medium pipeline import of energy strorage by using residual heat device and CO₂Follow The heat exchanging pipe outlet of ring trapping tower is connected, the dewatering dryer gas vent and CO₂Cooler gas import is connected It is logical, CO₂Cooler outlet and CO₂Compressor inlet is connected, CO₂Compressor outlet and liquefaction CO₂Storage tank import, regenerator are high Press CO₂Fluid inlet is connected, regenerator high pressure CO₂Fluid issuing and CO₂Energy storage equipment import is connected, CO₂Energy storage equipment Outlet is connected with the import of flow straightener, and flow straightener outlet is connected with turbine high-pressure inlet, and turbine is connected with generator shaft, Turbine low tension outlet connects with regenerator low pressure inlet, regenerator low tension outlet and CO₂Cooler inlet connects, and liquefy CO₂Storage Tank exports and CO₂High pressure pump inlet is connected, CO₂High pressure pump outlet and CO₂Energy storage equipment import is connected.

2. according to claim 1 be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas, it is special Sign is that described flue gas oxidation, purification device is contained SO in removing cement kiln flue gas₂、NO_x, it is chloride, fluoride, hydrocarbon Compound, heavy metal and dust pollution thing and purification separation solid waste and the device of clean gas, including oxidation, purification separate with aqueous vapor Agent set, oxidizing decontamination agent atomizing sprayer, scavenging solution circulating sprayer, sewage purification separator, the oxidation Cleanser atomizing sprayer separates agent set top with oxidation, purification with aqueous vapor and is connected, the scavenging solution circulated sprinkling dress Put and separated with oxidation, purification with aqueous vapor in the middle part of agent set and sewage purification separator is connected, the sewage purification separation dress Put and the bottom of agent set is separated with oxidation, purification with aqueous vapor be connected, sewage purification separator isolates gas cleaning generation Solids and purify reusing sewage.

3. according to claim 1 or 2 be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas, its It is characterised by, described membrane separation device is N₂/CO₂Membrane separation device, using the blast of tail exhaust blower air blast transmission as normal pressure, Using the negative-pressure ward masterpiece of chimney as rich N₂The power of side, using the negative-pressure ward masterpiece of flue gas compressor as rich CO₂The power of side.

4. according to claim 1 or 2 be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas, its It is characterised by, described CO₂Energy storage equipment refers to CO₂For the kiln head cover and grate-cooler in the direct accumulation cement production process of working medium In interior heat energy and/or kiln tail smoke-box heat energy and/or preheater tremie pipe heat energy and/or rotary kiln high temperature trunk radiant heat and/or High temperature waste gas residual heat is to supercritical CO₂Fluid accumulation of energy.

5. according to claim 1 or 2 be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas, its It is characterised by, described CO₂Circularly trapping tower is 2 more parallels to meet kiln gas CO₂More than trapping ability, or 2 go here and there Connection is with the CO of further purification trapping₂, or in parallel+be used in series.

6. according to claim 1 or 2 be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas, its It is characterised by, described CO₂Energy storage equipment is 2 sets of more parallels or series connection, or in parallel+be used in series.

7. according to claim 1 be adapted to the device that carbon dioxide is continuously trapped and generated electricity in cement kiln flue gas, it is special Sign is, described liquefaction CO₂Storage tank, CO₂Cooler, CO₂Compressor is 2 more parallels or is used in series, or parallel connection+string Connection uses.