CN204554798U - A kind of CFBB oxygen-enriched combusting dry method desulfuration system - Google Patents
A kind of CFBB oxygen-enriched combusting dry method desulfuration system Download PDFInfo
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- CN204554798U CN204554798U CN201520197116.9U CN201520197116U CN204554798U CN 204554798 U CN204554798 U CN 204554798U CN 201520197116 U CN201520197116 U CN 201520197116U CN 204554798 U CN204554798 U CN 204554798U
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- cyclone separator
- airduct
- burner hearth
- air
- oxygen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a kind of CFBB oxygen-enriched combusting dry method desulfuration system, comprise burner hearth, coal feeding hole, an air compartment, air-distribution device, high temperature cyclone separator, back-end ductwork, economizer, material returning device, at coal feeding hole or/and the feed back leg of material returning device is provided with desulfurizing agent charge door, warm cyclone separator during the back-end ductwork at economizer rear is connected with, the feed back storehouse of middle temperature cyclone separator is connected with burner hearth by pipeline, the central tube of middle temperature cyclone separator is connected with an air compartment by airduct and primary air piping, be connected with burner hearth by airduct and secondary air channel, airduct is provided with air-introduced machine, at airduct, at least one of them is provided with oxygen filling container for primary air piping and secondary air channel, the utility model effectively can solve boiler SOx qualified discharge problem, and improves the utilization rate of lime stone, reduces lime stone consumption, improves desulfuration efficiency, realizes efficient in stove, economic desulfurization, realize CO simultaneously
2enrichment, be convenient to CO
2compression purifying utilize and seal up for safekeeping, meet environmental protection needs.
Description
Technical field
The utility model relates to a kind of oxygen-enriched combusting dry method desulfuration system for CFBB.
Background technology
Thermal power generation is China's primary energy consumption and pollutant emission rich and influential family, is also one of important sources of atmosphere pollution, wherein CO
2, SO
2, NOx discharge accounts for more than 40% of total emission volumn respectively.Propose in " 12 " planning outline: to the end of the year 2015, unit GDP energy resource consumption is compared 2010 and is reduced by 16%, SO
2, NOx emission reduces 8%, 10% respectively.In Copenhagen climate change conference in 2009, Chinese Government announces the clear quantified goal controlling greenhouse gas emission, determine that the GDP CO2 emission of the year two thousand twenty unit declined 40% ~ 45% than 2005, this means that China will realize CO
2extensive reduction of discharging.The energy resource structure of China based on coal determines CO
2, SO
2, the chronicity of NOx emission reduction work, uniqueness and the severe situation that faces.This just needs to find the effective solution of a kind of pollution reduction for fossil fuel power.
Comparatively coal-powder boiler is good to the adaptability of coal for CFBB, and pollutant emission is controlled cost lower, obtains at home and applies comparatively widely.At present, conventional CFB boiler adopts the mode of in-furnace calcium spraying to carry out desulfurization usually, and this system is simple, equipment investment and operation expense low, desulfuration efficiency can reach 90% usually, is the one preferred technique of CFB boiler desulfurization under the prerequisite meeting discharging standards.
But up-to-date " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) regulation: from 1 day January in 2012, newly-built thermal power generation boiler SO
2concentration of emission must not more than 100mg/Nm
3, key area then must not more than 50mg/Nm
3.The enforcement of this standard, is difficult to decision-making CFB boiler desulfurization technology path.The coal quality that CFB boiler burns is usually poor, if S content is higher in coal, when not taking desulfurization measure, and SO in CFB boiler smoke
2content is very high, often can reach 3000-5000mg/Nm
3, even can reach 10000mg/Nm
3.At this moment, only take the method for conventional furnace sorbent injection desulfurization, even by adopting the measure such as technical optimization, raising Ca/S that desulfuration efficiency is brought up to 95%, be also difficult to ensure CFB boiler smoke SO
2concentration of emission is up to standard, and the method is difficult to realize CO in stove simultaneously
2enrichment, CO
2follow-up being difficult to focuses on, CO
2discharge is difficult to control, and easily exceeds standard.If set up separately a set of Limestone-gypsum Wet Flue Gas Desulfurization Process system for CFB boiler, or other high-efficiency desulfurization systems, desulfuration efficiency is made to reach more than 95%, then need to increase huge investment, operating cost, the advantage that pollutant catabolic gene cost CFB boiler being lost have compared with pulverized-coal fired boiler is low.On the other hand, wet desulfurizing process is system complex not only, and water consumption is high, and desulphurization cost is higher, is subject to certain application restriction in the underdeveloped and water-deficient area that China is vast; Meanwhile, along with haze weather more and more receives publicity and attention, the control of PM2.5 certainly will become a main trend, and another large problem that wet desulphurization faces is SO
3removal efficiency is lower, SO after desulfurization
3acid mist concentration is difficult to control, SO
3acid mist then can increase the PM2.5 concentration of smoke evacuation, is difficult to the needs meeting environmental protection.
Summary of the invention
For the technical problem of above-mentioned existence, the utility model provides a kind of CFBB oxygen-enriched combusting dry method desulfuration system, it effectively can solve boiler SOx qualified discharge problem, and improve the utilization rate of lime stone, reduce lime stone consumption, improve desulfuration efficiency, realize efficient in stove, economic desulfurization, be easy to control CO simultaneously
2discharge, meet environmental protection needs.
In order to achieve the above object, a kind of CFBB oxygen-enriched combusting dry method desulfuration system of the present utility model, comprise burner hearth, coal feeding hole, an air compartment, air-distribution device, high temperature cyclone separator, back-end ductwork, be located at the economizer in back-end ductwork, connect the material returning device of high temperature cyclone separator and burner hearth, at coal feeding hole or/and the feed back leg of material returning device is provided with desulfurizing agent charge door, warm cyclone separator in it is characterized in that being connected with on the back-end ductwork at economizer rear, the feed back storehouse of middle temperature cyclone separator is connected with burner hearth by pipeline, the central tube of middle temperature cyclone separator is connected with an air compartment by airduct and primary air piping, be connected with burner hearth by airduct and secondary air channel, airduct is provided with air-introduced machine, at airduct, at least one of them is provided with oxygen filling container for primary air piping and secondary air channel,
When the utility model uses: fire coal is sent into hearth combustion from coal feeding hole, limestone granularity as desulfurizing agent is broken for 0-2mm scope, by coal feeding hole or/and the desulfurizing agent charge door on the feed back leg of material returning device adds in stove, lime stone resolves into CaO and CO in stove
2, the SO in CaO and flue gas
2generate CaSO4, remove the SOx in flue gas; By high temperature cyclone separator by separating containing a large amount of unreacted lime stone or lime of carrying out through flue gas, send burner hearth back to by material returning device 8 and continue to participate in desulfurization, improve the utilization rate of lime stone and improve desulfuration efficiency; By middle temperature cyclone separator, containing unreacted lime stone or lime in the flying dust separated, collected and got off to send back to burner hearth continuation participation desulfurization, improve the utilization rate of lime stone and improve desulfuration efficiency; In simultaneously after economizer heat exchange, warm flue gas contains higher steam; the oxygen enrichment wind that part wet flue gas passes into through air-introduced machine, airduct, primary air piping and secondary air channel and oxygen filling container mixes; a large amount of steam is brought in stove; be equivalent to be humidified in stove; improve desulfuration efficiency, middle temperature flue gas recirculation forms large-scale CO again in stove
2enrichment;
The utility model is sent lime stone unreacted in flue gas or lime back to burner hearth at twice by high temperature cyclone separator and middle temperature cyclone separator and is continued to participate in desulfurization, desulfurizing agent, by fluidisation and the Inner eycle between burner hearth-separator-burner hearth in stove, can make the CaSO of parcel CaO
4breakage of particles, inner CaO exposed in flue gas and with the SO in flue gas
2or SO
3reaction generates CaSO
4, improve the utilization rate of lime stone; Middle temperature flue gas contains more steam, and the oxygen enrichment wind passed into oxygen filling container mixes, and brings in stove by a large amount of steam; be equivalent to be humidified in stove; can further improve desulfuration efficiency, ensure efficiency of combustion again, middle temperature flue gas recirculation forms again the CO of large-scale in stove
2enrichment, is convenient to follow-up focusing on, and is easy to control CO
2discharge, effectively solve the qualified discharge problem of boiler; Desulfurization all completes in stove, invest little, without water consumption, desulphurization cost is low, and without acid mist emission, meets environmental protection needs;
Preferred as one of the present utility model, also comprise disintegrating machine and screw conveyer, the discharging opening of disintegrating machine is connected by tube connector with the charging aperture of screw conveyer, and the discharge gate of screw conveyer is connected with each desulfurizing agent charge door by tube connector; By disintegrating machine and screw conveyer, limestone granularity can be broken within the scope of 0-2mm, and automatically send into each desulfurizing agent charge door;
In sum, the utility model effectively can solve boiler SOx qualified discharge problem, and improves the utilization rate of lime stone, reduces lime stone consumption, improves desulfuration efficiency, realizes efficient in stove, economic desulfurization, be easy to control CO simultaneously
2discharge, meet environmental protection needs.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, this CFBB oxygen-enriched combusting dry method desulfuration system, comprise burner hearth 1, coal feeding hole 2, an air compartment 3, air-distribution device 4, high temperature cyclone separator 5, back-end ductwork 6, be located at the economizer 7 in back-end ductwork 6, connect the material returning device 8 of high temperature cyclone separator 5 and burner hearth 1, the feed back leg 9 of coal feeding hole 2 and material returning device 8 is equipped with desulfurizing agent charge door, disintegrating machine 10 and screw conveyer 11 is provided with above coal feeding hole 2, the discharging opening of disintegrating machine 10 is connected by tube connector with the charging aperture of screw conveyer 11, the discharge gate of screw conveyer 11 is connected with each desulfurizing agent charge door by tube connector, warm cyclone separator 12 during the back-end ductwork 6 at economizer 7 rear is connected with, the feed back storehouse 13 of middle temperature cyclone separator 12 is connected with burner hearth 1 by pipeline, the central tube 16 of middle temperature cyclone separator 12 is connected by airduct and primary air piping 18 with an air compartment 3, is connected with burner hearth 1 by airduct and secondary air channel 19, airduct is provided with air-introduced machine 17, primary air piping 18 and secondary air channel 19 are equipped with oxygen filling container 20 or 21,
When the utility model uses: fire coal is sent into burner hearth 1 from coal feeding hole 2 and burns; Using broken through disintegrating machine 10 for the lime stone as desulfurizing agent, its granularity is 0-2mm scope, more automatically sends into the desulfurizing agent charge door on the feed back leg 9 of coal feeding hole and material returning device 8 through screw conveyer 11, and add in stove, lime stone resolves into CaO and CO in stove
2, the SO in CaO and flue gas
2generate CaSO4, remove the SOx in flue gas; By high temperature cyclone separator 5 by separating containing a large amount of unreacted lime stone or lime of carrying out through flue gas, send burner hearth 1 back to by material returning device 8 and continue to participate in desulfurization, improve the utilization rate of lime stone and improve desulfuration efficiency; By middle temperature cyclone separator 12, containing unreacted lime stone or lime in the flying dust separated from tail flue gas, is collected and get off to send back to burner hearth 1 and continue to participate in desulfurization, improved utilization rate and the raising desulfuration efficiency of lime stone; In simultaneously after economizer 7 heat exchange, warm flue gas contains more steam; the oxygen enrichment wind that part wet flue gas passes into through air-introduced machine 17, airduct, primary air piping 18 and secondary air channel 19 and respective oxygen filling container 20 or 21 mixes; form First air and the Secondary Air of oxygen enrichment; pass into an air compartment 3 and burner hearth 1 respectively; a large amount of steam is brought in stove; be equivalent to be humidified in stove, improve desulfuration efficiency, middle temperature flue gas recirculation forms large-scale CO again in stove
2enrichment; By controlling the power of air-introduced machine 17, the recycle ratio of the recirculation wet flue gas making it extract controls 60% ~ 75%, prevents the SOx in flue gas from occurring the problem of enrichment with flue gas recirculation, prevents flue and heating surface acid corrosion; By the heating surface quantity of arranging in adjustment economizer 7, control 15 ~ 30% by the content of steam in recirculation wet flue gas, temperature controls, within the scope of 250 DEG C ~ 450 DEG C, to reach preferably desulfurized effect;
The utility model is sent lime stone unreacted in flue gas or lime back to burner hearth at twice by high temperature cyclone separator 5 and middle temperature cyclone separator 12 and is continued to participate in desulfurization, desulfurizing agent, by fluidisation and the Inner eycle between burner hearth-separator-burner hearth in stove, can make the CaSO of parcel CaO
4breakage of particles, inner CaO exposed in flue gas and with the SO in flue gas
2or SO
3reaction generates CaSO
4, improve the utilization rate of lime stone; Middle temperature flue gas contains more steam, burner hearth 1 is sent into by an air compartment 3 and airduct through air-introduced machine 17, a large amount of steam is brought in stove, be equivalent to be humidified in stove, can further improve desulfuration efficiency, effective solution boiler SOx qualified discharge problem, desulfuration efficiency can bring up to more than 98% after testing, coal-fired sulfur content is no more than to the newly-built thermal power generation boiler SO of 5%
2concentration of emission can be controlled in 100 mg/Nm
3within, coal-fired sulfur content is no more than to the key area SO of 3%
2concentration of emission can be controlled in 50mg/Nm
3within; Middle temperature flue gas recirculation forms large-scale CO again in stove
2enrichment, is convenient to follow-up focusing on, and is easy to control CO
2discharge, effectively solve the qualified discharge problem of boiler; The utility model desulfurization all completes in stove, invest little, without water consumption, desulphurization cost is low, and without acid mist emission, meets environmental protection needs.
Claims (2)
1. a CFBB oxygen-enriched combusting dry method desulfuration system, comprise burner hearth, coal feeding hole, an air compartment, air-distribution device, high temperature cyclone separator, back-end ductwork, be located at the economizer in back-end ductwork, connect the material returning device of high temperature cyclone separator and burner hearth, at coal feeding hole or/and the feed back leg of material returning device is provided with desulfurizing agent charge door, warm cyclone separator in it is characterized in that being connected with on the back-end ductwork at economizer rear, the feed back storehouse of middle temperature cyclone separator is connected with burner hearth by pipeline, the central tube of middle temperature cyclone separator is connected with an air compartment by airduct and primary air piping, be connected with burner hearth by airduct and secondary air channel, airduct is provided with air-introduced machine, at airduct, at least one of them is provided with oxygen filling container for primary air piping and secondary air channel.
2. a kind of CFBB oxygen-enriched combusting dry method desulfuration system according to claim 1, it is characterized in that: also comprise disintegrating machine and screw conveyer, the discharging opening of disintegrating machine is connected by tube connector with the charging aperture of screw conveyer, and the discharge gate of screw conveyer is connected with each desulfurizing agent charge door by tube connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520197116.9U CN204554798U (en) | 2015-04-03 | 2015-04-03 | A kind of CFBB oxygen-enriched combusting dry method desulfuration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520197116.9U CN204554798U (en) | 2015-04-03 | 2015-04-03 | A kind of CFBB oxygen-enriched combusting dry method desulfuration system |
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| Publication Number | Publication Date |
|---|---|
| CN204554798U true CN204554798U (en) | 2015-08-12 |
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ID=53829903
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520197116.9U Withdrawn - After Issue CN204554798U (en) | 2015-04-03 | 2015-04-03 | A kind of CFBB oxygen-enriched combusting dry method desulfuration system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807002A (en) * | 2015-04-03 | 2015-07-29 | 东方电气集团东方锅炉股份有限公司 | Circulating fluidized bed boiler oxygen-enriched combustion dry desulphurization system and method |
| CN105698163A (en) * | 2016-01-27 | 2016-06-22 | 华北电力大学 | Oxygen-enriched combustion device and method of solid fuel circulating fluidized bed |
| CN106224944A (en) * | 2016-08-31 | 2016-12-14 | 哈尔滨锅炉厂有限责任公司 | Improve desulfurization efficiency of circulating fluidized bed boiler device and the method for desulfuration efficiency |
| CN110115878A (en) * | 2019-04-17 | 2019-08-13 | 江苏大学 | A kind of the double circulation desulphurization system and sulfur method of the burning of solid fuel chemistry chain |
| CN111578268A (en) * | 2020-05-13 | 2020-08-25 | 浙江大学 | Method and system for inhibiting sulfur and nitrogen oxides in circulating fluidized bed boiler |
| CN114992627A (en) * | 2022-04-22 | 2022-09-02 | 东方电气集团东方锅炉股份有限公司 | Supercritical circulating fluidized bed boiler burning ultra-low heat value lignite |
-
2015
- 2015-04-03 CN CN201520197116.9U patent/CN204554798U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807002A (en) * | 2015-04-03 | 2015-07-29 | 东方电气集团东方锅炉股份有限公司 | Circulating fluidized bed boiler oxygen-enriched combustion dry desulphurization system and method |
| CN105698163A (en) * | 2016-01-27 | 2016-06-22 | 华北电力大学 | Oxygen-enriched combustion device and method of solid fuel circulating fluidized bed |
| CN106224944A (en) * | 2016-08-31 | 2016-12-14 | 哈尔滨锅炉厂有限责任公司 | Improve desulfurization efficiency of circulating fluidized bed boiler device and the method for desulfuration efficiency |
| CN110115878A (en) * | 2019-04-17 | 2019-08-13 | 江苏大学 | A kind of the double circulation desulphurization system and sulfur method of the burning of solid fuel chemistry chain |
| CN111578268A (en) * | 2020-05-13 | 2020-08-25 | 浙江大学 | Method and system for inhibiting sulfur and nitrogen oxides in circulating fluidized bed boiler |
| CN114992627A (en) * | 2022-04-22 | 2022-09-02 | 东方电气集团东方锅炉股份有限公司 | Supercritical circulating fluidized bed boiler burning ultra-low heat value lignite |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150812 Effective date of abandoning: 20171114 |