CN109696516A - Horizontal dual chamber coke activation energy analyzer - Google Patents
Horizontal dual chamber coke activation energy analyzer Download PDFInfo
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- CN109696516A CN109696516A CN201910109176.3A CN201910109176A CN109696516A CN 109696516 A CN109696516 A CN 109696516A CN 201910109176 A CN201910109176 A CN 201910109176A CN 109696516 A CN109696516 A CN 109696516A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Abstract
Horizontal dual chamber coke activation energy analyzer, including electric furnace, oxygen cylinder, Molotov cocktail, smoke exhaust pipe and communicating pipe, communicating pipe is H-shaped, communicating pipe horizontal branch pipe and horizontal branch pipe on two vertical branch pipes be respectively mounted hand stop valve, smoke exhaust pipe successively installs hand stop valve and oxygen determination box along flow of flue gas direction, Molotov cocktail includes bottle cap, it seals and is threadedly coupled between bottle cap and bottle cylinder, bottle cap opens up two interface tubes, the vertical branch pipe bottom end bite type in the right side under one interface tube and communicating pipe horizontal branch pipe is tightly connected, another interface tube and smoke exhaust pipe bottom end bite type are tightly connected, oxygen cylinder opens up an interface tube, the interface tube is connected with the vertical branch pipe bottom end thread seal in the left side under communicating pipe horizontal branch pipe, two vertical branch pipes and smoke exhaust pipe pass through furnace lid under communicating pipe horizontal branch pipe.Fuel combustion experimental teaching, scientific research and industrial production etc. are higher than self-ignition point coke activation energy and measure occasion, and the present invention can be used.Measuring accuracy of the present invention improves 10%.
Description
Technical field
The present invention relates to a kind of coke activation energy measurement devices more particularly to one kind to be suitable for fuel combustion teaching, scientific research
Or the horizontal dual chamber coke activation energy analyzer that industrial production uses.
Background technique
Coal resources quantity is big, type is more, distribution is wide and the most commonly used solid fuel in China.Coal combustion character master
If being determined by coke burning.Coke quality reaches 55~97% in pure coal substance gross mass accounting, and coke calorific value is sent out in coal
Heat accounting reaches 60~95%, and coke burning time reaches 90% in coal combustion total time accounting, and the burning of research coke is to grinding
Studying carefully coal burning has great significance.Activation energy is that coke burning utilizes one of important motivity parameter.Obtaining fuel activating can be quasi-
Exact figures evidence can improve coal in application effects such as burning, chemical industry and refining catalytics, to improve fuel availability.
Conventional activation energy analyzer relies on pervasive integration method and Kissinger method, and test operation is complicated, data processing
It measures big (30 kinds of mechanism functions select one), data are influenced vulnerable to the external world, keep test error larger because fuel characteristic is different.Patent
CN104122295A discloses a kind of activation energy analyzer based on multiple scaaning performance rate method, coal and oxygen is placed in same
Room, oxygen heating heating, coal destructive distillation, coke heat temperature raising and coke combustion carry out simultaneously, exist release CO gas and
React the disadvantages of incomplete.CN204630963U discloses a kind of spontaneous combustible substance activation energy survey based on F-K involuntary ignition theory
Determine instrument, solid fuel is packed together, exists and lacked with air insufficient contact, uneven heating and the intermediate fuel gas of release etc.
Point.CN103926378A discloses a kind of activation energy analyzer based on Arrhenius law, and solution reagent is carried out water-bath
It carries out reaction with oxygen mix again after heating, there is the disadvantages of being only applicable to liquid and long reaction time.
Exploitation fuel activating can measure new equipment, activation energy cost of determination capable of saving fuel, easily operated and promote activation
Energy determination techniques industrial application, promotes resource-effective and environmental protection.
Summary of the invention
In order to overcome, existing activation energy sensing equipment is complicated for operation, calculates vulnerable to external environmental interference and later data processing
It measures the disadvantages of big, the present invention provides a kind of with " oxygen cylinder and Molotov cocktail separate " design feature, " oxygen heating, coke heating
Independently regulate and control with three processes such as coke-oxygen combustions " technical characterstic, " structure is simple, precision is high, easily operated and calculation amount is small "
Technical advantage is suitable for coke ignition temperature horizontal dual chamber coke activation energy analyzer used above.
Horizontal dual chamber coke activation energy analyzer mainly includes electric furnace, oxygen cylinder, Molotov cocktail, smoke exhaust pipe and communicating pipe, connects
Siphunculus is process by steel pipe, upright arrangement and H-shaped, and the vertical branch pipe in a left side on communicating pipe horizontal branch pipe installs manual shutoff
Valve, the vertical branch pipe top in a left side and oxygen cylinder outlet conduit on horizontal branch pipe are tightly connected, and installation is cut manually on horizontal branch pipe
Only valve, the vertical branch pipe in the right side on horizontal branch pipe install hand stop valve, the upper right vertical branch pipe top of horizontal branch pipe and nitrogen
Bottle outlet conduit is tightly connected, and smoke exhaust pipe successively installs hand stop valve and oxygen determination box along flow of flue gas direction, and Molotov cocktail includes
Bottle cap, between bottle cap and bottle cylinder seal be threadedly coupled, bottle cap open up left and right two vertical interface tubes, Zuo Shuzhi interface tube be connected to
The vertical branch pipe bottom end bite type in the right side under pipe horizontal branch pipe is tightly connected, and right vertical interface tube and smoke exhaust pipe bottom end bite type are close
Envelope connection, oxygen cylinder open up a vertical interface tube, the vertical branch pipe bottom end in a left side under the interface tube and communicating pipe horizontal branch pipe
Thread seal connection, electric furnace include bell, and three holes are arranged in bell, from left to right successively for left perpendicular under communicating pipe horizontal branch pipe
Allotment pipe, communicating pipe horizontal branch pipe the vertical branch pipe of lower right and smoke exhaust pipe pass through.
Combustion experiment teaching, combustion science research, the high-temperature cokes combustive activation such as burning industrial production can measure occasion, can
To use the present invention.
The configuration of the present invention is simple, error is small, easily operated, and calculation amount is small.Compare with conventional activation energy analyzer, the present invention
Coke activation energy measurement accuracy improves 10%.
Detailed description of the invention
Fig. 1 is the vertical cross-sectional view of horizontal dual chamber coke activation energy analyzer.In Fig. 1,1 is electric furnace, and 11 be bell, and 2 be storage
Oxygen bottle, 3 be Molotov cocktail, and 31 be bottle cap, and 4 be smoke exhaust pipe, and 41 be hand stop valve, and 42 be oxygen determination box, and 5 be communicating pipe, 51,52 and
53 be hand stop valve.
Specific embodiment
Invention is further described with reference to the accompanying drawing.
As shown in Fig. 1, horizontal dual chamber coke activation energy analyzer mainly includes electric furnace 1, oxygen cylinder 2, Molotov cocktail 3, row
Smoke pipe 4 and communicating pipe 5.Communicating pipe 5 is process by steel pipe, it is upright arrangement and it is H-shaped.Communicating pipe 5 includes horizontal branch pipe, is located at
The vertical branch pipe in a left side on horizontal branch pipe, the vertical branch pipe in the right side on horizontal branch pipe, the left side under horizontal branch pipe are perpendicular
Allotment pipe and the vertical branch pipe in the right side under horizontal branch pipe.The vertical branch pipe installation in a left side on communicating pipe 5 horizontal branch pipe is manual
Shut-off valve 51, installs hand stop valve 52 on communicating pipe 5 horizontal branch pipe, the vertical branch pipe peace in the right side on communicating pipe 5 horizontal branch pipe
Fill hand stop valve 53.The vertical branch pipe top in a left side and oxygen cylinder outlet conduit on communicating pipe 5 horizontal branch pipe are tightly connected, water
The vertical branch pipe top in the right side and nitrogen cylinder outlet conduit on flat branch pipe are tightly connected.Successively along flow of flue gas direction smoke exhaust pipe 4
Hand stop valve 41 and oxygen determination box 42 are installed.Molotov cocktail 3 includes bottle cap 31, and bottle cap 31 opens up the two vertical interface tubes in left and right, left
The vertical branch pipe bottom end bite type in the right side under vertical 5 horizontal branch pipe of interface tube and communicating pipe is tightly connected, right vertical interface tube and
4 bottom end bite type of smoke exhaust pipe is tightly connected.It seals and is threadedly coupled between 3 bottle cap 31 of Molotov cocktail and bottle cylinder.Oxygen cylinder 2 opens up one
The vertical branch pipe bottom end thread seal in a left side under vertical interface tube, the vertical interface tube and 5 horizontal branch pipe of communicating pipe connects.Connection
Connection is fully welded between 5 pipeline of pipe and hand stop valve 51, hand stop valve 52 or hand stop valve 53, gas in pipelines will not be let out
Drain to atmospheric environment.Connection is fully welded between 4 pipeline of smoke exhaust pipe and hand stop valve 41 or oxygen determination box 42, gas in pipelines will not be let out
Drain to atmospheric environment.Oxygen cylinder 2 and Molotov cocktail 3 are steel bottle, can high temperature high voltage resistant.5 horizontal branch pipe of oxygen cylinder 2 and communicating pipe
Under thread seal connection between left vertical branch pipe bottom end, high pressure oxygen will not leak into 1 inner cavity of electric furnace in oxygen cylinder 2.Burning
Bite type is tightly connected between bottle 3 and the vertical branch pipe bottom end of lower right of 5 horizontal branch pipe of communicating pipe, 4 bottom end of Molotov cocktail 3 and smoke exhaust pipe
Between bite type be tightly connected, high pressure oxygen or high pressure nitrogen will not leak into 1 inner cavity of electric furnace in Molotov cocktail 3.
Electric furnace 1 includes bell 11, and bell 11 is detachable, and three holes are arranged in bell 11, from left to right successively for 5 water of communicating pipe
Left vertical branch pipe under flat branch pipe, communicating pipe 5 horizontal branch pipe the vertical branch pipe of lower right and smoke exhaust pipe 4 pass through.At 1 three holes of electric furnace
It is tightly connected, hot-air in electric furnace 1 does not occur and leaks into atmospheric environment.Electric furnace 1 carries thermocouple and detects 1 inner cavity temperature of electric furnace
Degree, and temperature controller is carried by electric furnace 1 and controls 1 temperature of electric furnace within the scope of set temperature.
The vertical interface tube central axis in the left side that 3 bottle cap 31 of Molotov cocktail opens up, the vertical interface tube central axis that oxygen cylinder 2 opens up
Line, communicating pipe 5, left branch pipe central axis, horizontal branch pipe central axis and right horizontal branch pipe central axis vertically were same vertical
In plane.
2 cavity volume of oxygen cylinder is 1~1.5 times of 3 cavity volume of Molotov cocktail.Oxygen cylinder 2 and Molotov cocktail 3 can be mutually
Independent two bottles, are also possible to the horizontal dual chamber bottle being connected, and dual chamber bottle is in and inclines to " day " shape at this time.
The vertical interface tube that oxygen cylinder 2 opens up undertakes oxygen and enters and the functions such as oxygen discharge.3 bottle cap 31 of Molotov cocktail opens up
The vertical interface tube in a left side undertake oxygen and enter and functions, the vertical interface tube in the right side that bottle cap 31 opens up such as enter with nitrogen and undertake air row
Out, the functions such as nitrogen discharge and flue gas discharge.Communicating pipe 5 hand stop valve 51,52 and 53 switch combinations, thus it is possible to vary air-flow stream
Dynamic path.
It includes charging, gas cleaning, the four-stages such as heat temperature raising and coke burning that the present invention, which uses,.
Loading stage includes: to open bell 11, two vertical branch pipes of left and right and 4 bottom of smoke exhaust pipe under communicating pipe 5 horizontal branch pipe
End is each passed through the corresponding preformed hole of bell 11, and vertical branch pipe bottom end precession oxygen cylinder 2 left under 5 horizontal branch pipe of communicating pipe is erected
Straight tube interface makes the connection sealing of the vertical interface tube of oxygen cylinder 2 and the left vertical branch pipe bottom end of communicating pipe 5 between the two；It will be to be measured
Coke grind into powder weighs 1g~10g coke blacking and is placed in Molotov cocktail 3, screws 3 bottle cap 31 of Molotov cocktail, communicating pipe, 5 level was propped up
The vertical branch pipe bottom end in the right side under pipe is connected with the left vertical pipe interface cutting ferrule of 3 bottle cap of Molotov cocktail 31, makes both bottle cap 31 and bottle cylinder
Between connection sealing, make both vertical branch pipe bottom ends in the right side under left vertical 5 horizontal branch pipe of interface tube and communicating pipe of bottle cap 31
Between connection sealing；4 bottom end of smoke exhaust pipe is connected with the right vertical pipe interface cutting ferrule of 3 bottle cap of Molotov cocktail 31, keeps bottle cap 31 right vertical
The connection sealing of interface tube and 4 bottom end of smoke exhaust pipe between the two；Close bell 11；A left side on communicating pipe 5 horizontal branch pipe is vertical
It is tightly connected between branch pipe top and oxygen cylinder outlet conduit, seal for pipe joints connects between right vertical branch pipe top and nitrogen cylinder outlet
It connects.
Gas clean-up phase includes: to close hand stop valve 52, opens hand stop valve 51, is filled to 2 inner cavity of oxygen cylinder
Oxygen, controls oxygen cylinder and 2 meter pressure of oxygen cylinder reaches 0.4MPa, is then shut off hand stop valve 51；It successively opens manual
Shut-off valve 41 and 53 fills nitrogen to 3 inner cavity of Molotov cocktail, until oxygen concentration of flue gas sensor detects oxygen generation concentration in oxygen determination box 42
Reading is zero, and expression has drained original air in Molotov cocktail 3, successively closes hand stop valve 41 and 53.
The heat temperature raising stage includes: setting 1 inner cavity air themperature T of electric furnace1At 700-800 DEG C or more, electrified regulation makes to store up
Oxygen bottle 2 and 3 temperature of Molotov cocktail are raised to T1；Reach setting value T to 1 temperature of electric furnace1And it keeps no longer changing in 5 minutes.
Coke combustion phases includes: that oxygen concentration of flue gas sensor is placed in oxygen determination box 42, and on-line real-time measuremen coke
Combustion product gases oxygen concentration value；Hand stop valve 41 and 52 is successively opened, 2 oxygen of oxygen cylinder is entered by 5 horizontal branch pipe of communicating pipe
3 inner cavity of Molotov cocktail；The oxygen temperature being charged into is higher than coke self-ignition point, and coke initial burning spontaneous combustion, record oxygen concentration of flue gas is at any time
Between change and change curve.Writing down oxygen concentration of flue gas has the reaction start time of data and the unconverted reaction knot of oxygen concentration of flue gas
At the beam moment, the time is then in ignition temperature T between two moment1Lower coke burning time τ1。
1 power supply of electric furnace is closed, 1 temperature of electric furnace is waited to restore to room temperature, Molotov cocktail 3 is taken out and is cleaned.Second of test
1 temperature T of electric furnace is set2, and meet T2=T1+ 100 DEG C, keep test coke composition and quality, 2 the blowing pressure of oxygen cylinder twice
It is constant with test operation sequence, repeat above-mentioned testing procedure.Oxygen concentration of flue gas has the reaction start time of data and flue gas oxygen dense
Spending the time between unconverted reaction finish time is then in ignition temperature T2Lower coke burning time τ2。
According to Arrhenius law, coke combustive activation energy E calculating formula are as follows:
Lnk=-E/ (RT)+Lnk0
In formula: R is universal gas constant, and k is velocity constant of chemical reaction, k0For frequency factor.
Ignition temperature T1And T2Under, a pair of of equation group can be obtained in coke combustion reaction:
Lnk1=-E/ (RT1)+Lnk0
Lnk2=-E/ (RT2)+Lnk0
T2=T1+ 100 DEG C, solving equations can obtain:
E=83.14T1(T1+100)Ln(k2/k1)
With oxygen concentration of flue gas begin with reading to oxygen concentration of flue gas it is unchanged between time τ indicate burning time.Because
Velocity constant of chemical reaction k is related with ignition temperature T, and the more high then k of T is bigger, τ is shorter, τ1/τ2Indicate that combustion velocity increases
Multiple.
Coke combustive activation energy E calculating formula arranges are as follows:
E=83.14T1(T1+100)Ln(τ1/τ2)J/mol
Only two ignition temperatures need to be set, and guarantee that test condition is identical twice, being recorded twice burning time can arrange
Coke combustive activation energy out.
Structure of the invention innovation, technical characteristic and bring technical effect are described as follows:
The present invention has " oxygen cylinder 2 is separated with Molotov cocktail 3 " structure feature.Compared to conventional activation energy analyzer by oxygen
Gas-coke is placed on heating burning in the same Molotov cocktail 3, is separately heated oxygen and coke both with oxygen cylinder 2 and Molotov cocktail 3
Can guarantee oxygen and coke be heated to it is mutually synthermal after remix, and avoid oxygen and coke that oxygen just occurs in the heating period
Change reaction, generate carbon monoxide fuel gas, causes the problems such as surveying error, the operability and measurement result of device can be improved
Accuracy.
" oxygen cylinder 2 is separated with Molotov cocktail 3 " structure feature of the invention directly results in " oxygen heating, coke heating and coke
Three processes such as burning independently regulate and control " technical characteristic.It is that these three processes independently regulate and control that oxygen cylinder 2 and Molotov cocktail 3, which are provided separately,
Premise.What oxygen cylinder 2 and Molotov cocktail 3 were implemented separately oxygen and coke separates heating.By communicating pipe 5 and hand stop valve 51,
52, oxygen cylinder 2 and Molotov cocktail 3 are connected in 53 and 41 switch combination, realize oxygen and coke contact mixing.Due to oxygen and coke
Temperature after charcoal heating reaches the burning point of coke, can be realized after oxygen and coke mixing oxygen and coke mixture is automatic
Fire burning, is lighted without additional igniter, simplifies 3 bottle cap 31 of Molotov cocktail and the design of 1 bell of electric furnace, 11 structure.It is surveyed using the present invention
Determine coal burning activation energy, then because coal heating destructive distillation phenomenon increases evaluated error.It can measure and compare with conventional activation, this hair
Combustion oxidation reaction occurs for bright be avoided that before oxygen and coke mixture are not up to set temperature, generates CO gas, because
The problems such as reaction not exclusively influences test result accuracy.
When the present invention is run, needs to be equipped with an oxygen concentration of flue gas analyzer and be used together.It is measured using oxygen concentration of flue gas
When instrument, oxygen concentration sensor is placed in oxygen determination box 42.
Above structure feature and technical characteristic bring complex art effect are: the present invention is easily operated, and calculation amount is small, solution
Certainly existing activation energy measurement device vulnerable to external environmental interference, measuring method is complicated and measurement result error is big the problems such as, survey
Accuracy of measurement improves 10% than conventional activation energy analyzer.
Claims (1)
1. horizontal dual chamber coke activation energy analyzer mainly includes electric furnace, oxygen cylinder, Molotov cocktail, smoke exhaust pipe and communicating pipe, spy
Sign is: communicating pipe is process by steel pipe, upright arrangement and H-shaped, the vertical branch pipe peace in a left side on communicating pipe horizontal branch pipe
Hand stop valve is filled, the vertical branch pipe top in the left side on horizontal branch pipe and oxygen cylinder outlet conduit are tightly connected, on horizontal branch pipe
Hand stop valve is installed, the vertical branch pipe in the right side on horizontal branch pipe installs hand stop valve, the upper right vertical branch pipe of horizontal branch pipe
Top and nitrogen cylinder outlet conduit are tightly connected, and smoke exhaust pipe successively installs hand stop valve and oxygen determination box along flow of flue gas direction,
Molotov cocktail includes bottle cap, seals and is threadedly coupled between bottle cap and bottle cylinder, and bottle cap opens up the two vertical interface tubes in left and right, left vertical pipe
The vertical branch pipe bottom end bite type in the right side under interface and communicating pipe horizontal branch pipe is tightly connected, right vertical interface tube and smoke exhaust pipe bottom
Bite type is held to be tightly connected, oxygen cylinder opens up a vertical interface tube, and the left side under the interface tube and communicating pipe horizontal branch pipe is perpendicular
The connection of allotment tube bottom end thread seal, electric furnace include bell, and three holes are arranged in bell, from left to right successively for communicating pipe level branch
Left vertical branch pipe under pipe, communicating pipe horizontal branch pipe the vertical branch pipe of lower right and smoke exhaust pipe pass through.
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| CN201910109176.3A CN109696516A (en) | 2019-02-04 | 2019-02-04 | Horizontal dual chamber coke activation energy analyzer |
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| CN201910109176.3A CN109696516A (en) | 2019-02-04 | 2019-02-04 | Horizontal dual chamber coke activation energy analyzer |
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