CN207992199U - One kind is based on14The mixed combustion of the biomass of C isotope on-line checkings is than monitoring system - Google Patents
One kind is based on14The mixed combustion of the biomass of C isotope on-line checkings is than monitoring system Download PDFInfo
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- CN207992199U CN207992199U CN201721865765.7U CN201721865765U CN207992199U CN 207992199 U CN207992199 U CN 207992199U CN 201721865765 U CN201721865765 U CN 201721865765U CN 207992199 U CN207992199 U CN 207992199U
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Abstract
One kind is based on14The mixed combustion of the biomass of C isotope on-line checkings belongs to boiler combustion detection technique field than monitoring system.The system include mixed combusting boiler, back-end ductwork, exhaust pipe, gas cooler, filter, drier,14C isotopes on-line detector and flue gas analyzer；The back-end ductwork by exhaust pipe successively with gas cooler, filter, drier,14C isotope on-line detectors are connected with flue gas analyzer.14Placement thermocouple, heater and pressure sensor in C isotopes on-line detector.The system by detecting in real time14CO2、CO、CO2And SO2Concentration information, and carry out calculation processing, the mixed combustion ratio of biomass and coal can be obtained, be suitable for the formulation and execution of the relevant policies of biomass energy, promote the utilization of clean energy resource.
Description
Technical field
The utility model is related to one kind to be based on14The mixed combustion of the biomass of C isotope on-line checkings belongs to boiler than monitoring system
Combustion supervision technical field.
Background technology
The mixed combustion power generation of biomass refers on the basis of traditional coal-burning boiler, burns a certain proportion of biology by being mixed in coal
Matter fuel generates electricity, and can effectively realize the utilization to clean energy resource, achieve energy-saving and emission reduction purposes.It generates electricity with other biological matter
Mode, such as biomass direct combustion power generation, gasifying electricity generation are compared, and biomass, which generates electricity to have with coal for mixing combustion, can effectively reduce CO2Discharge
Amount is not required to carry out larger transformation to coal-burning power plant, is influenced the advantages such as small by season, biomass material purchase situation.Currently, I
State's generating power with biomass combustion mainly uses direct combustion mode, but with its high speed development, and it is short industry disorderly competition, raw material occurred
The problems such as scarce, support policy lag, insufficient funds, talent shortage.And for mixed combustion power generation, due to lacking to the effective of mixed combustion ratio
Monitoring means, China's policy subsidize it that dynamics is smaller, limit the development of the mixed combustion power generation of biomass.Electricity price subsidy is to biomass
Mixed 80% or more proportion requirement of combustion, but still there is the measurement problem to this ratio.
14C is a kind of radioactive isotope of carbon, and half-life period is about 5730, is much smaller than the formation time of coal, therefore
In coal14C content tends to 0.But its content is basicly stable in biomass.It therefore, can be mixed by detecting biomass and coal
After combination burning in flue gas14CO2Concentration determines biomass and the ratio of coal for mixing combustion.Adoptable isotope detection means have：Presumptuously
Dissipate infra-red sepectrometry, laser spectrometry and fourier transform infrared spectroscopy etc..Establish the monitoring of biomass and coal for mixing combustion ratio
Mechanism is particularly significant, and burning coal is mixed by the first avoidable biomass direct combustion power generation factory, and second can put into effect phase according to practical mixed combustion ratio
The subsidy policy answered cancels 80% mixed combustion proportion requirement, promotes biomass and the development of coal for mixing combustion at home.
Utility model content
The utility model proposes one kind to be based on14The mixed combustion of the biomass of C isotope on-line checkings is than monitoring system, it can be achieved that right
Biomass mixes the purpose that the mixed combustion ratio of combusting boiler monitors in real time.
The technical solution of the utility model is as follows：
One kind is based on14The mixed combustion of the biomass of C isotopes concentration on-line checkings is than monitoring system, it is characterised in that：The system
Including mixed combusting boiler, back-end ductwork, exhaust pipe, gas cooler, filter, drier,14C isotopes on-line detector and
Flue gas analyzer；The back-end ductwork by exhaust pipe successively with gas cooler, filter, drier,14C isotopes
On-line detector is connected with flue gas analyzer；Described14Placement thermocouple, heater and pressure in C isotopes on-line detector
Sensor.
The technical characteristics of the utility model also resides in：14Gas piping between C isotopes on-line detector and drier
On, that is, exist14Gas absorption cell inlet is equipped with pressure maintaining valve in C isotope on-line detectors.
The utility model has the following advantages and high-lighting effect：1. using14CO2Concentration, which confirms, mixes combustion ratio, by coal and
The interference of biomass other compositions changes of contents is small, and accuracy is high.2. by the negative feedback mechanism of temperature and pressure, utmostly
On reduce the influence of temperature and air pressure change to measurement result；3. passing through on-line monitoring14CO2The variation of concentration, can be real-time
To the ratio of the mixed combustion of biomass；4. the utility model is suitable for using a variety of agriculture and forestry wastes such as stalk, timber as biomass original
The boiler of material is limited small by raw material type.
Description of the drawings
Fig. 1 is provided by the utility model is based on14The mixed combustion of the biomass of C isotopes concentration on-line checkings is than monitoring system
Structure diagram.
1-mixed combusting boiler；2-back-end ductworks；3-exhaust pipes；4-gas coolers；5- filters；6-driers；
7-pressure maintaining valves；8—14C isotope on-line detectors；9-flue gas analyzers.
Specific implementation mode
The principles of the present invention, concrete structure and embodiment are further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is provided by the utility model is based on14The mixed combustion of the biomass of C isotopes concentration on-line checkings is than monitoring system
Structure diagram, the system comprises mixed combusting boiler 1, back-end ductwork 2, exhaust pipe 3, gas cooler 4, filter 5, driers
6, pressure maintaining valve 7,14C isotopes on-line detector 8 and flue gas analyzer 9.The mixed combusting boiler 1 is biomass and the mixed combustion pot of coal
Stove is connected to exhaust pipe 3 on back-end ductwork 2.Exhaust pipe 3 is sequentially connected filter 5 and drier by gas cooler 4
6.14On gas piping between C isotopes on-line detector 8 and drier 6, that is, exist14Gas in C isotopes on-line detector 8
Body absorption cell inlet is equipped with pressure maintaining valve 7,14C isotope on-line detectors outlet connection flue gas analyzer 9.Described14C is same
The temperature, pressure of under test gas is maintained to stablize by thermocouple, pressure sensor, heater etc. inside position element on-line detector 8.
The operation principle and process of the utility model is as follows：
Flue gas is extracted in real time from mixed combusting boiler back-end ductwork, is cooled down by gas cooler 4, and flue-gas temperature must be down to 25
DEG C or so, it is sequentially sent to filter 5 and drier 6 later, removes dust and vapor in flue gas；Flue gas is by steady after drying
Pressure valve 7 is sent into14C isotope on-line detectors, flue gas need to be in constant temperature and pressure state in gas absorption cell inside it, detect
It arrives14CO2Concentration；14C isotope on-line detectors detect14CO2The precision of concentration is at least 0.1ppt, i.e., 10-13Magnitude acquires it
In14CO2Flue gas is input to flue gas analyzer 9 after concentration information, detects CO, CO in flue gas2And SO2Levels.It is described14C
Isotope on-line detector uses but is not limited to following methods and is detected：Non-disperse infrared spectrum method, laser spectrometry and Fu
In leaf transformation infra-red sepectrometry etc..The gas cooler uses the indirect type of cooling, can be used but is not limited in flue gas pipeline
The outer mode for adding water cold sleeve cools down.The drier is used but is not limited to dry using Nafion pipes and addition HE-3 type chemistry
The drying tube etc. of drying prescription.Filter uses but is not limited to stainless steel particulate filter, porous ceramic filter and sintered porous gold
Belong to filter etc..
It obtains in flue gas by the above process14CO2Concentration, CO concentration and RO2Concentration, according to the principle of mass conservation, biology
Matter mixing proportion is calculated according to following formula：
Wherein, R is the mixing proportion of biomass in the mixed combustion fuel, FC、FSCarbon in the respectively described fuel in coal
Element and element sulphur mass content percentage, BcFor the carbon mass content percentage in biomass in the fuel, B14For
In the biomass14C accounts for the ratio of carbon total amount, G14For in flue gas14CO2Concentration, GCOFor the collected cigarette of flue gas analyzer
CO concentration in gas,For the collected CO of flue gas analyzer2And SO2Concentration and.
It is provided by the utility model to be based on14The mixed combustion of the biomass of C isotopes concentration on-line checkings is than the life in monitoring method
Biomass fuel can be stalk, timber or other agriculture and forestry wastes.
Claims (2)
1. one kind is based on14The mixed combustion of the biomass of C isotope on-line checkings is than monitoring system, it is characterised in that：The system includes mixed
Combusting boiler (1), back-end ductwork (2), exhaust pipe (3), gas cooler (4), filter (5), drier (6),14C isotopes
On-line detector (8) and flue gas analyzer (9)；The back-end ductwork by exhaust pipe successively with gas cooler (4), mistake
Filter (5), drier (6),14C isotopes on-line detector (8) and flue gas analyzer (9) connection；Described14C isotopes exist
Placement thermocouple, heater and pressure sensor in line detector.
2. one kind as described in claim 1 is based on14The mixed combustion of the biomass of C isotope on-line checkings is than monitoring system, feature
It is：14On gas piping between C isotopes on-line detector (8) and drier (6), that is, exist14C isotope on-line checkings
Gas absorption cell inlet is equipped with pressure maintaining valve (7) in instrument.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721865765.7U CN207992199U (en) | 2017-12-27 | 2017-12-27 | One kind is based on14The mixed combustion of the biomass of C isotope on-line checkings is than monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721865765.7U CN207992199U (en) | 2017-12-27 | 2017-12-27 | One kind is based on14The mixed combustion of the biomass of C isotope on-line checkings is than monitoring system |
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| CN207992199U true CN207992199U (en) | 2018-10-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051563A (en) * | 2017-12-27 | 2018-05-18 | 清华大学 | It is based on14The biomass of C isotope on-line checkings mixes combustion than monitoring system and method |
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2017
- 2017-12-27 CN CN201721865765.7U patent/CN207992199U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051563A (en) * | 2017-12-27 | 2018-05-18 | 清华大学 | It is based on14The biomass of C isotope on-line checkings mixes combustion than monitoring system and method |
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