CN209513693U - A kind of calorimeter assembly and system for coal dust calorific value on-line measurement - Google Patents
A kind of calorimeter assembly and system for coal dust calorific value on-line measurement Download PDFInfo
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- CN209513693U CN209513693U CN201821836158.2U CN201821836158U CN209513693U CN 209513693 U CN209513693 U CN 209513693U CN 201821836158 U CN201821836158 U CN 201821836158U CN 209513693 U CN209513693 U CN 209513693U
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- coal dust
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- calorific value
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Abstract
The utility model discloses a kind of calorimeter assemblies for coal dust calorific value on-line measurement, including the inner cylinder, insulating layer and outer cylinder being successively arranged from inside to outside, the inlet channel being connected after outer cylinder and insulating layer with inner cylinder, outlet passageway and laser channeling；First circulation working medium chamber is formed between the inner cylinder and insulating layer, forms second circulation working medium chamber between the insulating layer and outer cylinder, and the first circulation working medium chamber is connected with second circulation working medium chamber.Calorimeter assembly provided by the utility model for coal dust calorific value on-line measurement, based on laser ignition and temperature rise calorimetric principle, after the coal dust of industry spot enters combustion chambers burn, the online in situ measurement of coal dust calorific value may be implemented, measurement process is without human intervention, also, the temperature that working medium is reduced by the circulation of cycle fluid, does not need to be separately provided the measurement carried out again after temperature control device is cooled down next time；Accurately and timely, energy-saving effect is prominent for measurement result.
Description
Technical field
The utility model relates to calorific value on-line measurement fields, and in particular to a kind of for coal dust calorific value on-line measurement
Calorimeter assembly and system.
Background technique
The calorific value of coal is also known as coal kilocalorie, refers to the heat that coal is generated in burning.The calorific value of coal is to examine coal
The important link of principal element and power the fire coal valuation of charcoal quality, what the height of heating value of coal ran coal-burning power plant
Economy, feature of environmental protection etc. have a major impact.
The coal dust measurement of calorific value method being most widely used in coal-burning power plant at present is bomb method, by a certain amount of coal dust
It is put into crucible after sample weighing, crucible is placed in the container (oxygen bomb) of stainless steel.Hyperbaric oxygen is filled into combustion container/oxygen bomb
Gas.Sample is ignited in oxygen bomb by ignition wire and continuous line, and all organic compound combustions and oxidation in oxygen bomb release certain
Heat (sulfuric acid generates heat).It is full of water in interior bucket, water ring is made to be wound on the periphery of oxygen bomb, the heat that when burning generates can be transmitted to oxygen
Play the water on periphery.It measures and the temperature rise for calculating water can calculate the calorific value of coal dust.Bomb method measuring principle is simple, as a result may be used
It leans on, but needs artificial sample, to high operation requirements, and measurement need to carry out in laboratory, and measurement result hysteresis quality is big.
It is mostly by measured value relevant to burning front and back and to existing in existing online coal dust calorific value detection technique
The statistical analysis of field operation data, establishes fuel measurement model, predicts the calorific value of coal dust.But it is needed greatly due to establishing model
Amount data make statistical analysis early period, and model is not high for different coal versatilities, and on-line measurement ability is caused to be restricted.
The patent disclosure specification of Publication No. CN207148021U discloses a kind of improvement type calorimeter, which includes
Oxygen bomb with lid and cylinder, lid are equipped with concentrating component and oxygen bomb head assembly, the axis of oxygen bomb head assembly and lid
Axis collinear further includes optical transmitting set, and the light beam of optical transmitting set is injected in the cylinder through the light hole of the concentrating component, can
Realize automatic oxygenation and light ignition function simultaneously.The patent document of Publication No. CN101078702 discloses a kind of outer barrel band and stirs
The calorimeter of loop temperature-control device is mixed, it includes that interior bucket, outer barrel and the bung being set at the top of inner barrel and outer barrel, interior bucket are placed in
In outer barrel, the outer barrel cavity that medium is housed is formed between the lateral wall and inner sidewall of outer barrel, is equipped with air between inner barrel and outer barrel
Interlayer, said tub is interior to be equipped with the one or more outer barrel agitating device for medium agitation cycle, outer barrel stirring dress
It sets and is connected to form agitation cycle temperature regulating device with circulation supply equipment, circulation supply equipment includes temperature regulating device and driving device.
But the water temperature of the cyclic water tank in patent document disclosed above can increase at any time and increase, need to pass through temperature control
It could be used to measure again after equipment cooling, conventional efficient is reduced while increasing energy consumption, also to the accuracy band of measurement
Hidden danger is carried out；And the automatic placement that can not achieve crucible in above patent document, can not achieve on-line measurement.
Utility model content
The utility model provides a kind of calorimeter assembly and system for coal dust calorific value on-line measurement, is based on laser point
Fire and temperature rise calorimetric principle are not needed replacement oxygen bomb and are cooled down using temperature control device to thermometric working medium, and may be implemented
Coal dust is in the automatic clamping and placing of calorimeter assembly, and without human intervention, accurately and timely, energy-saving effect is prominent for measurement result for measurement process.
A kind of calorimeter assembly for coal dust calorific value on-line measurement, including be successively arranged from inside to outside inner cylinder, heat preservation
Layer and outer cylinder, the inlet channel being connected after outer cylinder and insulating layer with inner cylinder, outlet passageway and laser channeling；The inner cylinder
First circulation working medium chamber is formed between insulating layer, and second circulation working medium chamber, institute are formed between the insulating layer and outer cylinder
First circulation working medium chamber is stated to be connected with second circulation working medium chamber.
The calorimeter assembly for coal dust calorific value on-line measurement further includes removable end cap.The inner cylinder is burning
Room, coal dust burn in inner cylinder, and wherein coal dust is contained in crucible.
The volume of the second circulation working medium chamber is at least twice of first circulation working medium chamber.The mesh being arranged in this way
Be in order to can be used the multiple measurement that cycle fluid carries out coal dust calorific value, cycle fluid in first circulation working medium chamber and
Second circulation working medium chamber circulation, avoiding fixing working medium in the prior art not can be carried out coal dust next time after conducting certain heat
The test of calorific value, the problem of needing temperature control device to be cooled down.
The lower part of the insulating layer is equipped with cycle fluid entrance, and the top of the insulating layer goes out equipped with cycle fluid
Mouthful, first circulation working medium chamber is connected by cycle fluid entrance with cycle fluid outlet with second circulation working medium chamber.
The admission line is arranged by outer cylinder to inner cylinder in downwardly-inclined direction.The admission line and inner cylinder connects
Logical position is higher than position when crucible burns.Tilting down arrangement and a little higher than crucible of aperture position is to guarantee gas
It comes into full contact with after into combustion chamber with coal dust and is then exhausted from after combustion-supporting.
The inlet channel is connected with gas generator.
The laser channeling is located in admission line.Inlet channel and the two channels of laser channeling are combined into one,
On the one hand simplify structure, the gas of another aspect admission line can cool down laser fiber head and lens, while flying dust being avoided to be stained with
Dirty lens.
Optical fiber head and lens are equipped in the laser channeling, lens focus on the laser that optical fiber head issues in crucible
Coal dust surface.The optical fiber head is connected with laser generator, and the laser power that the optical fiber head issues is adjustable, and laser passes through lens
It is adjustable in the laser facula size and focal position of crucible inner focusing.
The outlet pipe from top to bottom surrounds inner cylinder screw arrangement.The screw arrangement of outlet pipe from top to bottom can be with
Increase the heat exchange area of exhaust gases after combustion and circulatory mediator, reduce the thermal loss that outlet exhaust is taken away, so that coal dust firing produces
Raw heat is as much as possible to pass to circulatory mediator.
The first circulation working medium chamber and second circulation working medium chamber is respectively equipped with temperature sensor；The air inlet
Flow sensor and temperature sensor are respectively equipped in pipeline and in outlet pipe.
The temperature sensor is used to acquire the temperature of cycle fluid or gas, and the flow sensor is for acquiring
The flow of combustion-supporting gas and burning waste gas.The temperature sensor is platinum resistance temperature sensor, the flow sensor
For gear meter.
Driving device, the driving device choosing are equipped in the first circulation working medium chamber or second circulation working medium chamber
From propeller or water pump.By setting propeller or water pump as driving device, to drive cycle fluid to recycle, and can lead to
Flow velocity is overregulated, realizes flash heat transfer, shortens time of measuring.Water pump also can be set outside device, or setting is recycling
Working medium entrances or cycle fluid outlet.
Specifically, the water pump can pump for microphyll piece.
The sealed chassis that the inner cylinder is equipped with support rod and is connected with support rod one end, the other end and motor of support rod
It is connected.
The support rod and sealed chassis is integral type or split type.Support rod moves up and down driven by the motor,
Crucible after sampling is put into inner cylinder to burn, and the crucible after burning is transferred out of inner cylinder.To realize coal dust
Automatic sampling.
Filling air or inert gas in the insulating layer.First circulation working medium chamber and first circulation working medium chamber
In cycle fluid be water.The gas generator is used to provide clean compressed gas, provides requisite oxygen for coal dust firing
Gas.The gas that the gas generator generates is air or oxygen.
The course of work of calorimeter assembly provided by the utility model for coal dust calorific value on-line measurement are as follows:
It moves end cap before measurement, at the top of device to open, sealed chassis and support rod are supreme with moving upwards by motor
At the top of device, the crucible for filling coal dust is placed in sealed chassis, and sealed chassis and support rod move downwardly to sealed chassis
It is close to inner cylinder bottom, the crucible for filling coal dust is put into inner cylinder, and top moves end cap and closes.
When measurement, combustion-supporting gas is passed through by gas generator from admission line, and laser generating device issues certain time length
Laser, laser light lens focus to coal dust surface firing coal-dust, coal dust under an oxygen-containing atmosphere all burnt discharge heat, combustion
Exhaust gas is burnt to be discharged from outlet pipe.The heat that coal dust firing discharges in combustion process passes to first circulation work by inner cylinder wall surface
Cycle fluid in matter chamber, cycle fluid is in first circulation working medium chamber and second circulation working medium chamber.
When coal dust firing, the temperature sensor in first circulation working medium chamber and second circulation working medium chamber acquires two respectively
The temperature of cycle fluid in a chamber, temperature sensor and flow sensor in inlet channel acquire the temperature of combustion-supporting gas respectively
Degree and flow, temperature sensor and flow sensor in outlet passageway acquire the temperature and flow of burning waste gas respectively.Wait adopt
After the temperature of collection is constant, above-mentioned temperature and data on flows are transmitted to computer, are modified calculating using computer program, i.e.,
The data of coal dust calorific value can be obtained.
It measures after-burner top and moves end cap opening, crucible is moved upwards by sealed chassis and support rod and is sent
Calorimeter assembly for coal dust calorific value on-line measurement.
The utility model also provides a kind of system for coal dust calorific value on-line measurement including above-mentioned calorimeter assembly.
The system further includes coal dust sampling weighing unit, clamping device, data processing unit and cleaning unit；It is described
Coal dust sampling weighing unit weighs to the coal dust of sampling；Coal dust after weighing is transferred to measurement list by the clamping device
Coal dust after burning is transferred to cleaning unit by member；The coal dust of the calorimeter assembly burning clamping device transfer, and acquire coal dust
The temperature and data on flows of calorific value, and it is transmitted to data processing unit；The data processing unit receive and process temperature and
Data on flows calculates coal dust calorific value；The cleaning unit is for clearing up the residual ash after coal dust firing.
The coal dust sampling weighing unit includes coal powder sampler, crucible and balance；The clamping device includes turning
Moving cell and the manipulator being mounted on rotating unit；After crucible to measuring unit, clamping burning after manipulator clamping sampling
Crucible to clearing up unit.
The clamping device is two, is located between coal dust sampling weighing unit and measuring unit and measurement is single
Between member and cleaning unit.
The cleaning unit includes air gun and articles holding table, and the tail portion of the air gun has gas generator, for generating
Compressed gas cleans the residual ash of coal dust after burning.
The method of the system on-line measurement coal dust calorific value are as follows:
S1, coal dust enter crucible from coal powder sampler, and balance weighs the quality of sampling front and back, obtains coal dust in crucible
Quality；
It is concordant with balance that S2, motor drive support rod to rise to upwards；
Crucible is transferred on support rod by S3, clamping device from balance；
S4, motor drive support rod decline, and crucible is sent into inner cylinder；
S5, air or oxygen enter inner cylinder by inlet channel, and laser passes through laser channeling firing coal-dust, coal dust firing
Afterwards, measuring device, combustion-supporting gas in temperature sensor and flow sensor acquisition inlet channel is discharged by outlet passageway in exhaust gas
Temperature and flow；The temperature and flow of acquisition disengaging gas, real-time Transmission is to data processing unit；
Heat is passed into first circulation working medium chamber and second circulation working medium chamber by inner cylinder when S6, coal dust firing
Cycle fluid and burning waste gas；It is recycled in temperature sensor acquisition first circulation working medium chamber and second circulation working medium chamber
The temperature and flow of burning waste gas in the temperature of working medium, temperature sensor and flow sensor acquisition outlet passageway；The temperature of acquisition
Degree and data on flows real-time Transmission are to data processing unit；
S7, coal dust afterburnt, motor drive support rod to rise to outside measuring device upwards；
Crucible is transferred to below articles holding table and air gun by S8, clamping device from support rod；
S9, air gun generator spray compressed gas, clean the residual ash in crucible after coal dust firing.
The circulation that S10, data processing unit are acquired by the temperature and flow of the step S5 combustion-supporting gas acquired, step S6
Temperature, the temperature and flow of the burning waste gas of step S6 acquisition of working medium, calculate coal dust calorific value.
The calculation formula of coal dust calorific value is as follows:
Wherein:
QcoalFor unit quality coal dust calorific value, U1For the amount of can increase in cycle fluid in first circulation working medium chamber, U2
For the amount of can increase in cycle fluid in second circulation working medium chamber, Q1For laser input energy, Q2Band when being discharged for combustion-supporting gas
Walk heat, Q3For outer cylinder and environment heat exchange amount, T0For in initial time first circulation working medium chamber and second circulation working medium chamber
The temperature of cycle fluid, T1For the temperature of cycle fluid in first circulation working medium chamber, T2To be recycled in second circulation working medium chamber
The temperature of working medium, TinFor the gas temperature in inlet channel, ToutFor the gas temperature in outlet passageway, TambientFor environment temperature
Degree, M is quality of pc, m1For cycle fluid quality in first circulation working medium chamber, m2For circulation industrial in second circulation working medium chamber
Matter quality, c are the specific heat of cycle fluid, cgFor the specific heat of gas, qgFor the mass flow of gas, h is that outer cylinder is changed with environmental convection
Hot coefficient, A are outer barrel surface product.m1And m2For fixed value, m2Much larger than m1。
Calorimeter assembly provided by the utility model for coal dust calorific value on-line measurement is arranged by pulverized coal channel, institute
The coal dust stated is equal partial sizes above industrial power coal in the micron-scale.
Calorimeter assembly provided by the utility model for coal dust calorific value on-line measurement, based on laser ignition and temperature rise amount
Pyrogen reason, after the coal dust of industry spot enters combustion chambers burn, may be implemented the in situ measurement of coal dust calorific value, measurement process without
It needs manual operation to replace oxygen bomb, also, reduces the temperature of working medium by the circulation of cycle fluid, do not need that temperature control is separately provided
Equipment carries out measurement next time again after being cooled down.Using system provided by the utility model measurement result accurately and timely,
Energy-saving effect is prominent.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the calorimeter assembly provided by the utility model for coal dust calorific value on-line measurement；
Fig. 2 is that the calorimeter assembly measurement front and back dress provided by the utility model for coal dust calorific value on-line measurement takes coal dust
And send out the schematic diagram of coal dust；
Fig. 3 is the schematic top plan view of the calorimeter assembly provided by the utility model for coal dust calorific value on-line measurement.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples, it is necessary to, it is noted that this reality
It applies example to be served only for that the utility model is further detailed, the boundary to scope of protection of the utility model can not be interpreted as
It is fixed.
As shown in Figure 1, Figure 2 and Figure 3, the calorimeter assembly provided in this embodiment for coal dust calorific value on-line measurement, packet
It includes: the removable end cap 1 at top, the inner cylinder 2 being successively arranged from inside to outside, insulating layer 3 and outer cylinder 4, inner cylinder 2, insulating layer 3 and outer
Cylinder 4 is in arranged in concentric circles, and first circulation working medium chamber 21, shape between insulating layer 3 and outer cylinder 4 are formed between inner cylinder 2 and insulating layer 3
At second circulation working medium chamber 22.
The lower part of insulating layer 3 is equipped with cycle fluid entrance 31, and the top of insulating layer 3 is equipped with cycle fluid and exports 32, first
Cycle fluid chamber 21 is connected by cycle fluid entrance 31 with cycle fluid outlet 32 with second circulation working medium chamber 22.It follows
Ring sender property outlet 32 is equipped with vane pump, and first circulation working medium chamber 21 flow to second circulation working medium chamber by vane pump
22, realize working medium in the circulation of first circulation working medium chamber 21 and second circulation working medium chamber 22.
First circulation working medium chamber 21 is equipped with the first temperature sensor, and second circulation working medium chamber 22 is passed equipped with second temperature
Sensor.Specifically, the lateral wall in inner cylinder can be set in the first temperature sensor, and second temperature sensor can be set in outer cylinder
Inner sidewall.
The inlet channel 5 arranged in 45 ° of directions are tilted down being connected with inner cylinder 2, admission line 5 are interior equipped with first-class
Quantity sensor and third temperature sensor.
Laser channeling 6 in inlet channel 5, is equipped with optical fiber head 61 and lens 62 in laser channeling 6, and lens 62 are by light
The laser that fine head 61 issues focuses on the coal dust surface in crucible.
The outlet passageway 7 for from top to bottom surrounding 2 screw arrangement of inner cylinder, be equipped in outlet pipe 7 second flow sensor and
4th temperature sensor.
The sealed chassis 9 that inner cylinder 2 is equipped with support rod 8 and is connected with support rod one end, the other end and the motor phase of support rod
Even.
It moves end cap 1 before measurement, at the top of device to open, sealed chassis 9 and support rod 8 are by motor with moving up to
Higher than at the top of device, the crucible for filling coal dust is placed in sealed chassis 9.Sealed chassis 9 and support rod 8 move downwardly to sealing
2 bottom of inner cylinder is close on chassis 9, and the crucible for filling coal dust is put into inner cylinder 2, and top moves end cap 1 and closes.
When measurement, combustion-supporting gas is passed through by gas generator from admission line 5, and optical fiber head 61 issues swashing for certain time length
Light, laser light lens 62 focus on coal dust surface firing coal-dust, and when coal dust firing transfers heat to first circulation working fluid chamber
The cycle fluid of room 21, under the driving of vane pump, cycle fluid is in first circulation working medium chamber 21 and second circulation working fluid chamber
Room 22 recycles；Burning waste gas also takes away certain heat simultaneously.
When burning, the first temperature sensor acquires the temperature of cycle fluid in first circulation working medium chamber 21, second temperature
Sensor acquires the temperature of cycle fluid in second circulation working medium chamber 22；Third temperature sensor and the 4th temperature sensor point
Not Cai Ji in inlet channel 5 and outlet passageway 7 combustion-supporting gas and burning waste gas temperature, first flow sensor and second flow
Sensor is respectively used to the mass flow of combustion-supporting gas and burning waste gas in acquisition inlet channel 5 and outlet passageway 7.By temperature with
Data on flows is transmitted to computer, is modified calculating using computer program, the data of coal dust calorific value can be obtained.
Measure after-burner top and move end cap 1 and open, crucible by sealed chassis 9 and support rod 8 move upwards by
Send out the calorimeter assembly for being used for coal dust calorific value on-line measurement.
It is above-mentioned be elaborate in conjunction with the embodiments to the utility model, but the embodiments of the present invention not by
The limitation of above-described embodiment, other any changes made under the utility model patent core guiding theory, replacement, combination letter
Change etc. is included within the protection scope of the utility model patent.
Claims (10)
1. a kind of calorimeter assembly for coal dust calorific value on-line measurement, which is characterized in that including what is be successively arranged from inside to outside
Inner cylinder, insulating layer and outer cylinder, the inlet channel being connected after outer cylinder and insulating layer with inner cylinder, outlet passageway and laser are logical
Road；First circulation working medium chamber is formed between the inner cylinder and insulating layer, forms second circulation between the insulating layer and outer cylinder
Working medium chamber, the first circulation working medium chamber are connected with second circulation working medium chamber.
2. the calorimeter assembly according to claim 1 for coal dust calorific value on-line measurement, which is characterized in that the guarantor
The lower part of warm layer is equipped with cycle fluid entrance, and the top of the insulating layer is exported equipped with cycle fluid, the first circulation
Working medium chamber is connected by cycle fluid entrance with cycle fluid outlet with second circulation working medium chamber.
3. the calorimeter assembly according to claim 1 for coal dust calorific value on-line measurement, which is characterized in that it is described into
Gas channel is arranged by outer cylinder to inner cylinder in downwardly-inclined direction.
4. the calorimeter assembly according to claim 3 for coal dust calorific value on-line measurement, which is characterized in that described swashs
Optical channel is located in inlet channel.
5. the calorimeter assembly according to claim 1 or 4 for coal dust calorific value on-line measurement, which is characterized in that described
Laser channeling in be equipped with optical fiber head and lens, the laser that optical fiber head issues focuses on the coal dust surface in crucible by lens.
6. the calorimeter assembly according to claim 1 for coal dust calorific value on-line measurement, which is characterized in that described goes out
Gas channel from top to bottom surrounds inner cylinder screw arrangement.
7. the calorimeter assembly according to claim 1 for coal dust calorific value on-line measurement, which is characterized in that described
One cycle fluid chamber and second circulation working medium chamber are respectively equipped with temperature sensor；In the inlet channel and outlet passageway
Inside it is respectively equipped with flow sensor and temperature sensor.
8. the calorimeter assembly according to claim 1 for coal dust calorific value on-line measurement, which is characterized in that described
Driving device is equipped in one cycle fluid chamber or second circulation working medium chamber, the driving device is selected from propeller or water pump.
9. the calorimeter assembly according to claim 1 for coal dust calorific value on-line measurement, which is characterized in that described is interior
The sealed chassis that cylinder is equipped with support rod and is connected with support rod one end, the other end of support rod are connected to the motor.
10. a kind of system for coal dust calorific value on-line measurement, which is characterized in that any described including claim 1-9
Calorimeter assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821836158.2U CN209513693U (en) | 2018-11-08 | 2018-11-08 | A kind of calorimeter assembly and system for coal dust calorific value on-line measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821836158.2U CN209513693U (en) | 2018-11-08 | 2018-11-08 | A kind of calorimeter assembly and system for coal dust calorific value on-line measurement |
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| CN209513693U true CN209513693U (en) | 2019-10-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270120A (en) * | 2018-11-08 | 2019-01-25 | 浙江大学 | A kind of calorimeter assembly and system for coal dust calorific value on-line measurement |
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2018
- 2018-11-08 CN CN201821836158.2U patent/CN209513693U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270120A (en) * | 2018-11-08 | 2019-01-25 | 浙江大学 | A kind of calorimeter assembly and system for coal dust calorific value on-line measurement |
| CN109270120B (en) * | 2018-11-08 | 2023-12-22 | 浙江大学 | Heat measuring device and system for on-line measurement of calorific value of pulverized coal |
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