CN105784537A - Experimental method and experimental system for simulation of staged combustion of decomposing furnace - Google Patents
Experimental method and experimental system for simulation of staged combustion of decomposing furnace Download PDFInfo
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Abstract
The invention provides an experimental method and an experimental system for simulation of staged combustion of a decomposing furnace. The system comprises different gas cylinders, gas flow control instruments, a gas mixing device, high-temperature tubular furnaces, a reaction product collection device, a raw material inlet, a main fuel inlet, a staged fuel inlet, a decomposing furnace quartz tube model, a flue gas analyzer and display equipment. By closure control of the staged fuel inlet and control of the gas meters, different fuel staged combustion schemes, different air staged combustion schemes and different fuel staged and air staged combustion co-implementation schemes can be realized for hot-state experiment simulated experiments, and denitration rates, raw material decomposing rates and fuel burnout rates of the schemes are calculated and compared. The experimental method and the experimental system for simulation of staged combustion of the decomposing furnace has the advantages that convenience in use is achieved, hot-state experiment simulation of different staged combustion schemes of the decomposing furnace can be realized, and the problem of difficulty in implementation of hot-state experiment simulation during scheme design of staged combustion of the decomposing furnace is solved.
Description
Technical field
The present invention relates to simulation dore furnace simulation technical field, be specifically related to a kind of experimental system simulating dore furnace fractional combustion and method.
Background technology
Along with the continuous quickening of China's modernization, problem of environmental pollution is subject to social concerns gradually.Along with climbing up and up of China's cement output, manufacture of cement has become China NOxOne of important polluter of discharge, occupies the 3rd after being only second to thermal power generation and vehicle exhaust.2014 China " cement industry atmosphere pollutants emission standards " promulgation then make cement plant, various places carry out NOxThe task of reduction of discharging seem particularly arduous.For dore furnace NOxReduction of discharging, be generally adopted SCR SCR, SNCR SNCR and grading combustion technology.But SCR operating cost is higher, then there is certain temperature window in the use of SNCR, and above-mentioned two methods are all likely to result in the leakage of ammonia, bring new pollution.Grading combustion technology is then high because of its denitration efficiency, and operating cost is low, it is not necessary to dore furnace is carried out big transformation and enjoys favor.
Fractional combustion is broadly divided into fuel-staged combustion and Researched of Air Staging Combustion Burning Pulverized Coal, and what both of which can form coal combustion in stove not exclusively fires region so that corresponding region produces a certain amount of reducing atmosphere, thus to NO in stovexReduce, the NO that coal dust firing generates can also be suppressed in addition to a certain extentx, it is a kind of economical and practical NOxReduction of discharging approach.But in practice process, the difference of each material inlet condition in the difference constructed due to each cement plant dore furnace and actual production, thus causing very big difficulty to the determination of the optimum fractional combustion scheme corresponding to different decomposition stove.If carrying out the debugging of different fractional combustion scheme on the dore furnace that reality is properly functioning, stablizing of dore furnace operating mode obviously can be caused very macrolesion by this.And adopt the simulation that the mode of numerical simulation carries out different hierarchy plan also to there is certain deficiency, simulation process can exist the ideal modelization to some experiment conditions process, furnace interior divide the real data collection of boundary condition be the quantity of chemical reaction in difficult, stove in addition and interaction mechanism is also extremely complex.The appearance of these problems above-mentioned can make the analog result carrying out dore furnace fractional combustion with method for numerical simulation relatively large deviation occur with actual result, thus bringing uncertain consequence to the enforcement of practical solution.
Summary of the invention
The technical problem to be solved in the present invention is, in view of the foregoing defects the prior art has, provide a kind of experimental system simulating dore furnace fractional combustion and method, realize with fuel staging common implementing scheme, the different Researched of Air Staging Combustion Burning Pulverized Coal scheme of different decomposition stove, different fuel fractional combustion scheme and different air classification are carried out Thermal-state test simulation, solving dore furnace fractional combustion Thermal-state test in scheme design process and simulate the problem being difficult to carry out, this device is easy to use.
The present invention solves that above-mentioned technical problem be the technical scheme is that
A kind of experimental system simulating dore furnace fractional combustion, including the first tube type high-temperature furnace, the second tube type high-temperature furnace, three-tube type high temperature furnace, flue gas analyzer and display device；Dore furnace quartz ampoule model it is provided with in three-tube type high temperature furnace pipe, first tube type high-temperature furnace and the second tube type high-temperature furnace are arranged at three-tube type high temperature furnace lower end, it is provided with the first quartz ampoule in first tube type high-temperature furnace pipe, be provided with the second quartz ampoule and the 3rd quartz ampoule in second tube type high-temperature furnace pipe, the first quartz ampoule, the second quartz ampoule and the 3rd quartz ampoule respectively with dore furnace quartz ampoule model bottom UNICOM；
First tube type high-temperature furnace is externally provided with multiple flue gas gas cylinder and gas mixing device, and flue gas gas cylinder is provided with gas-flow rate controller, and flue gas gas cylinder is mixed to get simulated flue gas by pipeline through gas mixing device, is connected with the first quartz ampoule；
Second tube type high-temperature furnace is externally provided with two air gas cylinders, and air gas cylinder is provided with gas-flow rate controller, and an air gas cylinder is connected by pipeline and the second quartz ampoule, and another air gas cylinder is connected by pipeline and the 3rd quartz ampoule；
Three-tube type high temperature furnace upper end is provided with barb-shaped furnace roof, barb-shaped furnace roof afterbody is provided with product collection device, it is provided with baffle plate in product collection device, barb-shaped furnace roof inner chamber and dore furnace quartz ampoule mould impression UNICOM, dore furnace quartz ampoule model is provided with fuel inlet, raw material entrance and classification fuel inlet, barb-shaped furnace roof is provided with tail flue gas acquisition port, tail flue gas acquisition port is connected with flue gas analyzer by pipeline, and analysis result is shown by flue gas analyzer by display device.
Connecing technique scheme, described flue gas gas cylinder number is 4, is respectively provided with N in 4 flue gas gas cylinders2、NO、CO2And O2。
Connecing technique scheme, barb-shaped furnace roof is circular arc.
Connecing technique scheme, tail flue gas acquisition port is provided with high temperature resistant cell quartz and weaves cotton cloth net.
The experimental technique during experimental system of above-described simulation dore furnace fractional combustion is weighed in employing, comprises the following steps:
1) the first tube type high-temperature furnace, the second tube type high-temperature furnace and three-tube type high temperature furnace are opened so that it is be warming up to preset temperature；
2) flue gas analyzer and display device are opened；
3) opening flue gas gas cylinder, the blended device of various gases in flue gas gas cylinder passes in dore furnace quartz ampoule model, is controlled concentration and the flow of flue gas by gas-flow rate controller；
4) being simulated experiment according to multiple schemes respectively, multiple schemes include following several situation: the simulation non-fractional combustion of dore furnace, simulation dore furnace fuel-staged combustion, simulation dore furnace Researched of Air Staging Combustion Burning Pulverized Coal and simulation dore furnace fuel staging are implemented with Researched of Air Staging Combustion Burning Pulverized Coal simultaneously；
5) in dore furnace quartz ampoule model after stable conditions, closed baffle plate, record flue gas analyzer records the concentration value of various gas；
6) in dore furnace quartz ampoule model after stable conditions certain time, take off product collection device, collect reaction product layer on baffle plate, i.e. product after stable conditions weigh and record its gross mass, and obtain the fuel burnout rate of simulation experiment, meal calcining rate and reduction of nitrogen oxide rate by calculating.
7) data recorded in contrast multiple analog experimental program, obtain optimal case.
Connect technique scheme, described step 4) in simulation the non-fractional combustion of dore furnace specifically include following steps:
A) opening an air gas cylinder, air controls to pass into the flow of combustion air in dore furnace quartz ampoule model by gas-flow rate controller, and makes another air gas cylinder remain off；
B) close classification fuel inlet, open baffle plate, the raw material of certain mass and coal dust are passed into dore furnace quartz ampoule model from raw material entrance and fuel inlet respectively, burns.
Connect technique scheme, described step 4) in simulation dore furnace fuel-staged combustion specifically include following steps:
A) opening an air gas cylinder, air controls to pass into the flow of combustion air in dore furnace quartz ampoule model by gas-flow rate controller, and makes another air gas cylinder remain off；
B) open baffle plate, the raw material of certain mass are passed into dore furnace quartz ampoule model from raw material entrance, the coal dust of certain mass is passed into dore furnace quartz ampoule model from fuel inlet and classification fuel inlet respectively, burns.
Connect technique scheme, described step 4) in simulation dore furnace Researched of Air Staging Combustion Burning Pulverized Coal specifically include following steps:
A) opening two air gas cylinders, air enters in dore furnace quartz ampoule model respectively through the second quartz ampoule and the 3rd quartz ampoule, is controlled the flow of combustion air by gas-flow rate controller；
B) close classification fuel inlet, open baffle plate, the raw material of certain mass and coal dust are passed into dore furnace quartz ampoule model from raw material entrance and fuel inlet respectively, burns.
Connect technique scheme, described step 4) in simulation dore furnace fuel staging and Researched of Air Staging Combustion Burning Pulverized Coal implement to specifically include following steps simultaneously:
A) opening two air gas cylinders, air enters in dore furnace quartz ampoule model respectively through the second quartz ampoule and the 3rd quartz ampoule, is controlled the flow of combustion air by gas-flow rate controller；
B) open baffle plate, the raw material of certain mass are passed into dore furnace quartz ampoule model from raw material entrance, the coal dust of certain mass is passed into dore furnace quartz ampoule model from fuel inlet and classification fuel inlet respectively, burns.
Connect technique scheme, step 1) in the experimental temperature that is suitable for of the first tube type high-temperature furnace and the second tube type high-temperature furnace range for 1000 DEG C～1200 DEG C, the experimental temperature that three-tube type high temperature furnace 14 is suitable for ranges for 800 DEG C～1000 DEG C.
The method have the advantages that
By the closedown to various fuel, raw material entrance and various gas access, and flow and the speed of inlet gas are controlled by gas-flow rate controller, thus realizing with fuel staging common implementing scheme, the different Researched of Air Staging Combustion Burning Pulverized Coal scheme of different decomposition stove, different fuel fractional combustion scheme and different air classification are carried out Thermal-state test simulation, solving dore furnace fractional combustion Thermal-state test in scheme design process and simulate the problem being difficult to carry out, this device is easy to use.
Accompanying drawing explanation
Fig. 1 is the structural representation of the experimental system simulating dore furnace fractional combustion in the embodiment of the present invention；
Fig. 2 is the flow chart of the experimental technique simulating dore furnace fractional combustion in the embodiment of the present invention；
nullIn figure，1-the first gas cylinder，2-the second gas cylinder，3-the 3rd gas cylinder，4-the 4th gas cylinder，5-the first gas-flow rate controller，6-the second gas-flow rate controller，7-the 3rd gas-flow rate controller，8-the 4th gas-flow rate controller，9-gas mixing device，10-the first quartz ampoule，11-the first tube type high-temperature furnace，12-the second quartz ampoule，13-the 3rd quartz ampoule，14-the second tube type high-temperature furnace，15-the 5th gas-flow rate controller，16-the 6th gas-flow rate controller，17-the 5th gas cylinder，18-the 6th gas cylinder，19-fuel inlet，20-raw material entrance，21-classification fuel inlet，22-three-tube type high temperature furnace，23-product collection device，24-baffle plate，25-is high temperature resistant cell quartz weaves cotton cloth net，26-flue gas analyzer，27-display device，28-dore furnace quartz ampoule model.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
With reference to shown in Fig. 1, the experimental system of the simulation dore furnace fractional combustion in an embodiment provided by the invention, including first tube type high-temperature furnace the 11, second tube type high-temperature furnace 14, three-tube type high temperature furnace 22, flue gas analyzer 26 and display device 27；Three-tube type high temperature furnace 22 is provided with dore furnace quartz ampoule model 28 in managing, first tube type high-temperature furnace 11 and the second tube type high-temperature furnace 14 are arranged at three-tube type high temperature furnace 22 lower end, first tube type high-temperature furnace 11 is provided with the first quartz ampoule 10 in managing, second tube type high-temperature furnace 14 is provided with the second quartz ampoule 12 and the 3rd quartz ampoule 13 in managing, first quartz ampoule the 10, second quartz ampoule 12 and the 3rd quartz ampoule 13 respectively with dore furnace quartz ampoule model 28 bottom UNICOM；
First tube type high-temperature furnace 11 is externally provided with multiple flue gas gas cylinder and gas mixing device 9, and flue gas gas cylinder is provided with gas-flow rate controller, and flue gas gas cylinder is mixed to get simulated flue gas by pipeline through gas mixing device 9, is connected with the first quartz ampoule 10；
Second tube type high-temperature furnace 14 is externally provided with two air gas cylinders, and air gas cylinder is provided with gas-flow rate controller, and an air gas cylinder is connected by pipeline and the second quartz ampoule 12, and another air gas cylinder is connected by pipeline and the 3rd quartz ampoule 13；
Three-tube type high temperature furnace 22 upper end is provided with barb-shaped furnace roof, barb-shaped furnace roof afterbody is provided with product collection device 23, baffle plate 24 it is provided with in product collection device 23, barb-shaped furnace roof inner chamber and dore furnace quartz ampoule model 28 inner chamber UNICOM, dore furnace quartz ampoule model 28 is provided with fuel inlet 19, raw material entrance 20 and classification fuel inlet 21, barb-shaped furnace roof is provided with tail flue gas acquisition port, tail flue gas acquisition port is connected with flue gas analyzer 26 by pipeline, and analysis result is shown by flue gas analyzer 26 by display device 27.
By the closedown to various fuel, raw material entrance 20 and various gas access, and flow and the speed of inlet gas are controlled by gas-flow rate controller, thus the different Researched of Air Staging Combustion Burning Pulverized Coal scheme of different decomposition stove, different fuel fractional combustion scheme and different air classification are carried out Thermal-state test simulation with fuel staging common implementing scheme, solving dore furnace fractional combustion Thermal-state test in scheme design process and simulate the problem being difficult to carry out, this device is easy to use.
Further, described flue gas gas cylinder number is 4, is respectively provided with N in 4 flue gas gas cylinders2、NO、CO2And O2。
Further, barb-shaped furnace roof is circular arc.
Further, tail flue gas acquisition port is provided with high temperature resistant cell quartz and weaves cotton cloth net 25.
As in figure 2 it is shown, experimental technique when adopting the experimental system simulating dore furnace fractional combustion described in claim 1, comprise the following steps:
1) first tube type high-temperature furnace the 11, second tube type high-temperature furnace 14 and three-tube type high temperature furnace 22 is opened so that it is be warming up to preset temperature；
2) flue gas analyzer 26 and display device 27 are opened；
3) opening flue gas gas cylinder, the blended device of various gases in flue gas gas cylinder passes in dore furnace quartz ampoule model 28, is controlled concentration and the flow of flue gas by gas-flow rate controller；
4) being simulated experiment according to multiple schemes respectively, multiple schemes include following several situation: the simulation non-fractional combustion of dore furnace, simulation dore furnace fuel-staged combustion, simulation dore furnace Researched of Air Staging Combustion Burning Pulverized Coal and simulation dore furnace fuel staging are implemented with Researched of Air Staging Combustion Burning Pulverized Coal simultaneously；
5) (observe flue gas analyzer 26 and show numerical value after stable conditions in dore furnace quartz ampoule model 28, until the concentration value of each gas that flue gas analyzer 26 records remains stable for occurring without ± the change of 2% in 5min, it is believed that inner operating is stable, each gas is CO, CO2、O2、NO、NOxDeng), closed baffle plate 24, record flue gas analyzer 26 records the concentration value of various gas；
6) stable conditions after 5 minutes in dore furnace quartz ampoule model 28, take off product collection device 23, collect reaction product layer on baffle plate 24, i.e. product after stable conditions weigh and record its gross mass, and obtain the fuel burnout rate of simulation experiment, meal calcining rate and reduction of nitrogen oxide rate by calculating.
7) the non-fractional combustion of comparative simulation dore furnace, simulation dore furnace fuel-staged combustion, simulation dore furnace Researched of Air Staging Combustion Burning Pulverized Coal and simulation dore furnace fuel staging are implemented with Researched of Air Staging Combustion Burning Pulverized Coal to plant the data recorded in various schemes simultaneously, obtain optimal case.
Further, described step 4) in simulation the non-fractional combustion of dore furnace specifically include following steps:
A) opening an air gas cylinder, air controls to pass into the flow of combustion air in dore furnace quartz ampoule model 28 by gas-flow rate controller, and makes another air gas cylinder remain off；
B) close classification fuel inlet 21, open baffle plate 24, the raw material of certain mass and coal dust are passed into dore furnace quartz ampoule model 28 from raw material entrance 20 and fuel inlet 19 respectively, burns.
Further, described step 4) in simulation dore furnace fuel-staged combustion specifically include following steps:
A) opening an air gas cylinder, air controls to pass into the flow of combustion air in dore furnace quartz ampoule model 28 by gas-flow rate controller, and makes another air gas cylinder remain off；
B) open baffle plate 24, the raw material of certain mass are passed into dore furnace quartz ampoule model 28 from raw material entrance 20, the coal dust of certain mass is passed into dore furnace quartz ampoule model 28 from fuel inlet 19 and classification fuel inlet 21 respectively, burns.
Further, described step 4) in simulation dore furnace Researched of Air Staging Combustion Burning Pulverized Coal specifically include following steps:
A) opening two air gas cylinders, air enters in dore furnace quartz ampoule model 28 respectively through the second quartz ampoule 12 and the 3rd quartz ampoule 13, is controlled the flow of combustion air by gas-flow rate controller；
B) close classification fuel inlet 21, open baffle plate 24, the raw material of certain mass and coal dust are passed into dore furnace quartz ampoule model 28 from raw material entrance 20 and fuel inlet 19 respectively, burns.
Further, described step 4) in simulation dore furnace fuel staging and Researched of Air Staging Combustion Burning Pulverized Coal implement to specifically include following steps simultaneously:
A) opening two air gas cylinders, air enters in dore furnace quartz ampoule model 28 respectively through the second quartz ampoule 12 and the 3rd quartz ampoule 13, is controlled the flow of combustion air by gas-flow rate controller；
B) open baffle plate 24, the raw material of certain mass are passed into dore furnace quartz ampoule model 28 from raw material entrance 20, the coal dust of certain mass is passed into dore furnace quartz ampoule model 28 from fuel inlet 19 and classification fuel inlet 21 respectively, burns.
Further, described step 1) in the experimental temperature that is suitable for of the first tube type high-temperature furnace 11 and the second tube type high-temperature furnace 14 range for 1000 DEG C～1200 DEG C, the experimental temperature that three-tube type high temperature furnace 22 is suitable for ranges for 800 DEG C～1000 DEG C.
Further, in described step b), the experiment raw material amount passing into raw material entrance 20 applicable is 0.1～2g/min, and the experiment coal dust amount passing into fuel inlet 19 applicable is 0.01～0.2g/min, and the experiment coal dust amount passing into classification fuel inlet 21 applicable is 0.01～0.2g/min.
One embodiment of the present of invention one, dore furnace does not carry out the simulation of fractional combustion operating mode
Open the first tube type high-temperature furnace 11 to be allowed to warm to 1100 DEG C, open the second tube type high-temperature furnace 14 and be allowed to warm to 900 DEG C, open three-tube type high temperature furnace 22 and be allowed to warm to 1100 DEG C, and open flue gas analyzer 26 and result display apparatus 27, open equipped with N2The first gas cylinder 1 and by the first gas-flow rate controller 5 by its flow-control 1.06L/min, open the second gas cylinder 2 equipped with NO and by the second gas-flow rate controller 6 by its flow-control at 0.013L/min, open equipped with CO2The 3rd gas cylinder 3 and by the 3rd gas-flow rate controller 7 by its flow-control at 0.20L/min, open equipped with O2The 4th gas cylinder 4 and by the 4th gas-flow rate controller 8 by its flow-control at 0.053L/min, open the 6th gas cylinder 18 equipped with air, controlling to pass into the flow of combustion air in dore furnace model by the 6th gas-flow rate controller 16 is 1.28L/min, and make the 5th gas-flow rate controller 15 be maintained at closed mode, close classification fuel inlet 21, open baffle plate 24, preset the coal dust passing into raw material that certain mass flow is 0.60g/min and 0.05g/min from raw material entrance 20 and fuel inlet 19 respectively according to experimental program.Then flue gas analyzer 26 registration is observed, until CO, CO that flue gas analyzer 26 records2、O2、NO、NOxRemain stable for occurring without ± change the 5min of 2% etc. the concentration value of each gas, it is believed that inner operating is stable, and to count the now moment be 0 i.e. starting point moment.Now closed baffle plate 24, start collecting reaction product and start to record CO, the CO on current flue gas analyzer 26 display device 272、O2、NO、NOxDeng concentration value, to gather 5 minutes experimental datas for timing end point, average obtain CO, CO by recording the every kind of gas concentration value obtained in these 5 minutes2、O2、NO、NOxConcentration value respectively 2ppm, 33%, 2.67%, 800ppm and 810ppm.Take off product collection device 23, collect reaction product layer on baffle plate 24 and the product after stable conditions and weigh that to record its gross mass be 1.60g, and obtaining the fuel burnout rate of simulation experiment, meal calcining rate and reduction of nitrogen oxide rate respectively 95%, 92% and 19% by calculating.
One embodiment of the present of invention two, dore furnace fuel-staged combustion is simulated
Open the first tube type high-temperature furnace 11 to be allowed to warm to 1100 DEG C, open the second tube type high-temperature furnace 14 and be allowed to warm to 900 DEG C, open three-tube type high temperature furnace 22 and be allowed to warm to 1100 DEG C, and open flue gas analyzer 26 and result display apparatus 27, open equipped with N2The first gas cylinder 1 and by the first gas-flow rate controller 5 by its flow-control 1.06L/min, open the second gas cylinder 2 equipped with NO and by the second gas-flow rate controller 6 by its flow-control at 0.013L/min, open equipped with CO2The 3rd gas cylinder 3 and by the 3rd gas-flow rate controller 7 by its flow-control at 0.20L/min, open equipped with O2The 4th gas cylinder 4 and by the 4th gas-flow rate controller 8 by its flow-control at 0.053L/min, open the 6th gas cylinder 18 equipped with air, controlling to pass into the flow of combustion air in dore furnace model by the 6th gas-flow rate controller 16 is 1.28L/min, and make the 5th gas-flow rate controller 15 be maintained at closed mode, open baffle plate 24, preset according to experimental program respectively from raw material entrance 20, fuel inlet 19 and classification fuel inlet 21 and pass into the coal dust that mass flow is the raw material of 0.60g/min, the coal dust of 0.03g/min and 0.02g/min.Then flue gas analyzer 26 registration is observed, until CO, CO that flue gas analyzer 26 records2、O2、NO、NOxRemain stable for occurring without ± change the 5min of 2% etc. the concentration value of each gas, it is believed that inner operating is stable, and to count the now moment be 0 i.e. starting point moment.Now closed baffle plate 24, start collecting reaction product and start to record CO, the CO on current flue gas analyzer 26 display device 272、O2、NO、NOxDeng concentration value, to gather 5 minutes experimental datas for timing end point, average obtain CO, CO by recording the every kind of gas concentration value obtained in these 5 minutes2、O2、NO、NOxConcentration value respectively 4ppm, 31%, 2.70%, 618ppm and 623ppm.Take off product collection device 23, collect reaction product layer on baffle plate 24 and the product after stable conditions and weigh that to record its gross mass be 1.57g, and obtaining the fuel burnout rate of simulation experiment, meal calcining rate and reduction of nitrogen oxide rate respectively 92%, 89% and 38% by calculating.
One embodiment of the present of invention three, dore furnace Researched of Air Staging Combustion Burning Pulverized Coal is simulated
Open the first tube type high-temperature furnace 11 to be allowed to warm to 1150 DEG C～1200 DEG C, open the second tube type high-temperature furnace 14 and be allowed to warm to 850 DEG C～900 DEG C, open three-tube type high temperature furnace 22 and be allowed to warm to 1000 DEG C～1050 DEG C, and open flue gas analyzer 26 and result display apparatus 27, open equipped with N2The first gas cylinder 1 and by the first gas-flow rate controller 5 by its flow-control 1.06L/min, open the second gas cylinder 2 equipped with NO and by the second gas-flow rate controller 6 by its flow-control at 0.013L/min, open equipped with CO2The 3rd gas cylinder 3 and by the 3rd gas-flow rate controller 7 by its flow-control at 0.20L/min, open equipped with O2The 4th gas cylinder 4 and by the 4th gas-flow rate controller 8 by its flow-control at 0.053L/min, open the 6th gas cylinder 18 equipped with air, and to control the flow of this part combustion air by the 6th gas-flow rate controller 16 be 0.89L/min, open the 5th gas cylinder 17 equipped with air, and the flow passing through the 5th gas-flow rate controller 15 is controlled this part combustion air is 0.38L/min, close classification fuel inlet 21, open baffle plate 24, preset the coal dust passing into raw material that certain mass flow is 0.60g/min and 0.05g/min respectively according to experimental program from raw material entrance 20 and fuel inlet 19.Then flue gas analyzer 26 registration is observed, until CO, CO that flue gas analyzer 26 records2、O2、NO、NOxRemain stable for occurring without ± change the 5min of 2% etc. the concentration value of each gas, it is believed that inner operating is stable, and to count the now moment be 0 i.e. starting point moment.Now closed baffle plate 24, start collecting reaction product and start to record CO, the CO on current flue gas analyzer 26 display device 272、O2、NO、NOxDeng concentration value, to gather 5 minutes experimental datas for timing end point, average obtain CO, CO by recording the every kind of gas concentration value obtained in these 5 minutes2、O2、NO、NOxConcentration value respectively 5ppm, 29%, 2.72%, 722ppm and 730ppm.Take off product collection device 23, collect reaction product layer on baffle plate 24 and the product after stable conditions and weigh that to record its gross mass be 1.55g, and obtaining the fuel burnout rate of simulation experiment, meal calcining rate and reduction of nitrogen oxide rate respectively 91%, 89% and 27% by calculating.
One embodiment of the present of invention four, dore furnace fuel staging implements simulation with Researched of Air Staging Combustion Burning Pulverized Coal simultaneously
Open the first tube type high-temperature furnace 11 to be allowed to warm to 1100 DEG C, open the second tube type high-temperature furnace 14 and be allowed to warm to 900 DEG C, open three-tube type high temperature furnace 22 and be allowed to warm to 1100 DEG C, and open flue gas analyzer 26 and result display apparatus 27, open equipped with N2The first gas cylinder 1 and by the first gas-flow rate controller 5 by its flow-control 1.06L/min, open the second gas cylinder 2 equipped with NO and by the second gas-flow rate controller 6 by its flow-control at 0.013L/min, open equipped with CO2The 3rd gas cylinder 3 and by the 3rd gas-flow rate controller 7 by its flow-control at 0.20L/min, open equipped with O2The 4th gas cylinder 4 and by the 4th gas-flow rate controller 8 by its flow-control at 0.053L/min, open the 6th gas cylinder 18 equipped with air, and to control the flow of this part combustion air by the 6th gas-flow rate controller 16 be 0.89L/min, open the 5th gas cylinder 17 equipped with air, and the flow passing through the 5th gas-flow rate controller 15 is controlled this part combustion air is 0.38L/min, open baffle plate 24, from raw material entrance 20, fuel inlet 19 and classification fuel inlet 21 are preset according to experimental program respectively and are passed into the raw material that mass flow is 0.60g/min, the coal dust of 0.03g/min and the coal dust of 0.02g/min.Then flue gas analyzer 26 registration is observed, until CO, CO that flue gas analyzer 26 records2、O2、NO、NOxRemain stable for occurring without ± change the 5min of 2% etc. the concentration value of each gas, it is believed that inner operating is stable, and to count the now moment be 0 i.e. starting point moment.Now closed baffle plate 24, start collecting reaction product and start to record CO, the CO on current flue gas analyzer 26 display device 272、O2、NO、NOxDeng concentration value, to gather 5 minutes experimental datas for timing end point, average obtain CO, CO by recording the every kind of gas concentration value obtained in these 5 minutes2、O2、NO、NOxConcentration value respectively 5ppm, 29%, 2.71%, 544ppm and 550ppm.Take off product collection device 23, collection can product after reaction product layer and stable conditions weigh that to record its gross mass be 1.55g on closed baffle plate 24, and obtain the fuel burnout rate of simulation experiment, meal calcining rate and reduction of nitrogen oxide rate respectively 91%, 88% and 45% by calculating.
In sum, this device is easy to use, the closedown to various fuel, raw material entrance 20 and various gas access can be passed through, and adopt gas-flow rate controller that the flow of inlet gas is controlled, thus realizing different dore furnace fractional combustion schemes is simulated, solving Thermal-state test in the design process of dore furnace fractional combustion scheme and simulating the problem being difficult to carry out.
Above is only presently preferred embodiments of the present invention, certainly with this interest field limiting the present invention, therefore can not change according to the equivalence that the present patent application the scope of the claims is made, still belong to protection scope of the present invention.
Claims (10)
1. the experimental system simulating dore furnace fractional combustion, it is characterised in that include the first tube type high-temperature furnace, the second tube type high-temperature furnace, three-tube type high temperature furnace, flue gas analyzer and display device；Dore furnace quartz ampoule model it is provided with in three-tube type high temperature furnace pipe, first tube type high-temperature furnace and the second tube type high-temperature furnace are arranged at three-tube type high temperature furnace lower end, it is provided with the first quartz ampoule in first tube type high-temperature furnace pipe, be provided with the second quartz ampoule and the 3rd quartz ampoule in second tube type high-temperature furnace pipe, the first quartz ampoule, the second quartz ampoule and the 3rd quartz ampoule respectively with dore furnace quartz ampoule model bottom UNICOM；
First tube type high-temperature furnace is externally provided with multiple flue gas gas cylinder and gas mixing device, and flue gas gas cylinder is provided with gas-flow rate controller, and flue gas gas cylinder is mixed to get simulated flue gas by pipeline through gas mixing device, is connected with the first quartz ampoule；
Second tube type high-temperature furnace is externally provided with two air gas cylinders, and air gas cylinder is provided with gas-flow rate controller, and an air gas cylinder is connected by pipeline and the second quartz ampoule, and another air gas cylinder is connected by pipeline and the 3rd quartz ampoule；
Three-tube type high temperature furnace upper end is provided with barb-shaped furnace roof, barb-shaped furnace roof afterbody is provided with product collection device, it is provided with baffle plate in product collection device, barb-shaped furnace roof inner chamber and dore furnace quartz ampoule mould impression UNICOM, dore furnace quartz ampoule model is provided with fuel inlet, raw material entrance and classification fuel inlet, barb-shaped furnace roof is provided with tail flue gas acquisition port, tail flue gas acquisition port is connected with flue gas analyzer by pipeline, and analysis result is shown by flue gas analyzer by display device.
2. the experimental system of simulation dore furnace fractional combustion according to claim 1, it is characterised in that described flue gas gas cylinder number is 4, is respectively provided with N in 4 flue gas gas cylinders2、NO、CO2And O2。
3. the experimental system of simulation dore furnace fractional combustion according to claim 1, it is characterised in that barb-shaped furnace roof is circular arc.
4. the experimental system of simulation dore furnace fractional combustion according to claim 1, it is characterised in that tail flue gas acquisition port is provided with high temperature resistant cell quartz and weaves cotton cloth net.
5. experimental technique when adopting the experimental system of simulation dore furnace fractional combustion described in claim 1, it is characterised in that comprise the following steps:
1) the first tube type high-temperature furnace, the second tube type high-temperature furnace and three-tube type high temperature furnace are opened so that it is be warming up to preset temperature；
2) flue gas analyzer and display device are opened；
3) opening flue gas gas cylinder, the blended device of various gases in flue gas gas cylinder passes in dore furnace quartz ampoule model, is controlled concentration and the flow of flue gas by gas-flow rate controller；
4) being simulated experiment according to multiple schemes respectively, multiple schemes include following several situation: the simulation non-fractional combustion of dore furnace, simulation dore furnace fuel-staged combustion, simulation dore furnace Researched of Air Staging Combustion Burning Pulverized Coal and simulation dore furnace fuel staging are implemented with Researched of Air Staging Combustion Burning Pulverized Coal simultaneously；
5) in dore furnace quartz ampoule model after stable conditions, closed baffle plate, record flue gas analyzer records the concentration value of various gas；
6) in dore furnace quartz ampoule model after stable conditions certain time, take off product collection device, collect reaction product layer on baffle plate, i.e. product after stable conditions weigh and record its gross mass, and obtain the fuel burnout rate of simulation experiment, meal calcining rate and reduction of nitrogen oxide rate by calculating.
7) data recorded in contrast multiple analog experimental program, obtain optimal case.
6. the experimental technique of simulation dore furnace fractional combustion according to claim 4, it is characterised in that described step 4) in simulation the non-fractional combustion of dore furnace specifically include following steps:
A) opening an air gas cylinder, air controls to pass into the flow of combustion air in dore furnace quartz ampoule model by gas-flow rate controller, and makes another air gas cylinder remain off；
B) close classification fuel inlet, open baffle plate, the raw material of certain mass and coal dust are passed into dore furnace quartz ampoule model from raw material entrance and fuel inlet respectively, burns.
7. the experimental technique of simulation dore furnace fractional combustion according to claim 4, it is characterised in that described step 4) in simulation dore furnace fuel-staged combustion specifically include following steps:
A) opening an air gas cylinder, air controls to pass into the flow of combustion air in dore furnace quartz ampoule model by gas-flow rate controller, and makes another air gas cylinder remain off；
B) open baffle plate, the raw material of certain mass are passed into dore furnace quartz ampoule model from raw material entrance, the coal dust of certain mass is passed into dore furnace quartz ampoule model from fuel inlet and classification fuel inlet respectively, burns.
8. the experimental technique of simulation dore furnace fractional combustion according to claim 4, it is characterised in that described step 4) in simulation dore furnace Researched of Air Staging Combustion Burning Pulverized Coal specifically include following steps:
A) opening two air gas cylinders, air enters in dore furnace quartz ampoule model respectively through the second quartz ampoule and the 3rd quartz ampoule, is controlled the flow of combustion air by gas-flow rate controller；
B) close classification fuel inlet, open baffle plate, the raw material of certain mass and coal dust are passed into dore furnace quartz ampoule model from raw material entrance and fuel inlet respectively, burns.
9. the experimental technique of simulation dore furnace fractional combustion according to claim 4, it is characterised in that described step 4) in simulation dore furnace fuel staging and Researched of Air Staging Combustion Burning Pulverized Coal implement to specifically include following steps simultaneously:
A) opening two air gas cylinders, air enters in dore furnace quartz ampoule model respectively through the second quartz ampoule and the 3rd quartz ampoule, is controlled the flow of combustion air by gas-flow rate controller；
B) open baffle plate, the raw material of certain mass are passed into dore furnace quartz ampoule model from raw material entrance, the coal dust of certain mass is passed into dore furnace quartz ampoule model from fuel inlet and classification fuel inlet respectively, burns.
10. the experimental technique of simulation dore furnace fractional combustion according to claim 5, it is characterized in that, step 1) in the experimental temperature that is suitable for of the first tube type high-temperature furnace and the second tube type high-temperature furnace range for 1000 DEG C～1200 DEG C, the experimental temperature that three-tube type high temperature furnace 14 is suitable for ranges for 800 DEG C～1000 DEG C.
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