CN105203583A - Device and method for testing coal pyrolysis coking process - Google Patents
Device and method for testing coal pyrolysis coking process Download PDFInfo
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Abstract
The invention discloses a device for testing a coal pyrolysis coking process. The device comprises a furnace with a rectangular furnace bottom, vertical sidewalls and an arched top, and is characterized in that the front and left sidewalls of the furnace are furnace walls, the right and rear sidewalls of the furnace are quartz glass sidewalls, the right quartz glass sidewall is a mobilizable quartz glass sidewall (11) which is arranged on a slide rail and can move forward and backward, and the top of the furnace forms a sight hole (5). According to the device and method, process characteristics can be reproduced by real-time image acquisition and process visualization is realized so that coal coking expansion can be observed visually and vividly and coal expansion process pressure is obtained and thus understanding of coal expansion characteristics and coal coke form change in coal heating coking is improved.
Description
Technical field
The invention belongs to the technical field of measurement and test of coal high temperature pyrolysis coking, be specifically related to a kind of test unit and method of testing pyrolysis of coal Coking Process.
Background technology
China has abundant coal resource, utilizes in process at the energy, larger to the dependence proportion of coal.Very many-sided work has been carried out to the processing and utilization coal worker of coal.Its utilization ways, mainly in three, utilizes coal to carry out gasification and obtains synthetic gas (CN1721511A, CN86105896) and be used for preparing methyl alcohol or being used as reducing gas; Utilize coal to carry out high temperature carbonization production coke (CN1171807A, CN1465656A) to produce for blast furnace ironmaking; Due to the shortage of petroleum resources, utilizing DCL/Direct coal liquefaction to prepare oil (CN1676572A) replaces oil to be also subject to increasing attention, CN202881174U proposes the testing coke oven that a kind of 40kg can measure the coking coal swelling pressure, also be only a conventional test coke oven, pyrolysis of coal coking visualization function can not be realized.
China produces molten iron every year more than 800,000,000 tons, and this has very big demand to ironmaking production coke raw material, and coke production remains China and utilizes coal resource very important approach.Coal is heated and produces a large amount of plastic masss in coke furnace carbonization chamber, and there occurs thermal decomposition and polyreaction, finally just defines the coke that can be used for blast fumance.Coke is along with what kind of metamorphosis the change of time and temperature there occurs in carbonization chamber, and there occurs which chemistry or physical reactions, changes phase how, owing in carbonization chamber being a high temperature black box, always unknown.Utilize the change that a kind of experimental provision observation coal testing pyrolysis of coal Coking Process occurs in Coking Process, for the control of process of coking temperature schedule, in pyrolysis of coal Coking Process, the adjustment of the control of coke quality and the control of plastic mass formation volume and Blending all has certain directive function.
Summary of the invention
Patent of the present invention proposes a kind of test unit and method of testing pyrolysis of coal Coking Process.The object of the invention is for coal in pyrolysis Coking Process, the coking of coal goes forward one by one the expansion in stage, degassed, the formation of plastic mass is grown up, the invisibility of adhesive solidification, invent a kind of test unit and method of testing pyrolysis of coal Coking Process, for improving coke quality, Optimized Coal Blending and coking technique system provide guidance.
Test a test unit for pyrolysis of coal Coking Process, comprise that furnace bottom is rectangle, sidewalls vertical, furnace roof are the body of heater of arch, it is characterized in that:
The front side of described body of heater and left side sidewall are furnace wall, and right side and rear side sidewall are quartz glass sidewall, and wherein the quartz glass sidewall on right side is the movable quartz glass sidewall 11 being arranged on slide rail, can moving forward and backward;
Described furnace roof top is formed with peep-hole 5;
Described a kind of test unit testing pyrolysis of coal Coking Process also comprises,
Be arranged at the electric furnace heating wire 9 in the furnace wall of side, be arranged at the heat-insulation layer outside described body of heater, be arranged at the pressure expansion instrument 16 outside described movable quartz glass sidewall 11, be arranged at the scale 18 below described movable quartz glass sidewall 11, be arranged at the top quartz glass 4 above described peep-hole 5, be arranged at the industrial camera 17 above described top quartz glass 4
Measure pyrolysis of coal swell value by scale 18 in temperature-rise period, measure the pyrolysis of coal swelling pressure by pressure expansion instrument 16, just can be obtained maximum swelling rate and the maximum swelling pressure of lump coal by computer disposal.
Thus, industrial camera by top carries out real-time online sampling to the coal coking sample in stove, by dismounting detachable heat-insulation layer naked-eye observation slagging process, the swelling pressure in coal Coking Process are measured by pressure expansion instrument, directly swell value is measured by scale, obtain coal sample linear expansion value at this temperature, then by calculating the expansivity of coal sample.
According to a kind of test unit testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
Described heat-insulation layer comprises: to be arranged on the downside of described furnace bottom and bottom heat-insulation layer 14 outside described furnace wall, furnace roof week side top heat-insulation layer 2, be arranged at the detachable heat-insulation layer 13 of described quartz glass sidewall outside.
According to a kind of test unit testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
The inclined-plane of described furnace roof is provided with Halogen lamp LED 7, described body of heater outer setting has the intensity of light controller controlling described Halogen lamp LED.
Thus, can to throwing light in body of heater and controlling intensity of light, with the image of shooting clear.
According to a kind of test unit testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
Be formed with the purging slit 6 of height 4-6mm between described top quartz glass and described peep-hole, described purging slit 6 is connected with the draft tube 1 of leading to described body of heater outside, diameter is 4-6mm.
According to a kind of test unit testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
Be provided with above the furnace wall of described left side lead to body of heater outside, diameter is 2-4mm goes out air cleft 7, described in go out the externally ported of air cleft 7 and be provided with condenser 15 of bleeding.
Thus, inert gas N2, He or Ar gas can be entered after purging slit through draft tube and enter furnace roof space through peep-hole, then through going out air cleft, by bleeding, the pyrolysis gas produced in stove and the gas passed into are extracted out outside stove by condenser, keep gas circuit steady, can ensure that the tar gas produced is not bonded on the quartz glass of top by gas purging, ensure that shooting is clear.
A kind of test unit testing pyrolysis of coal Coking Process of the present invention, is characterized in that: the furnace wall of described front side sidewall is provided with three temperature thermocouple jacks.
Thus, the temperature of diverse location in coal sample can be measured.
A kind of test unit testing pyrolysis of coal Coking Process of the present invention, is characterized in that: described top quartz glass edge is provided with sealing mechanism.
A kind of test unit testing pyrolysis of coal Coking Process of the present invention, is characterized in that: the section of described peep-hole is trapezoidal.
Test a method for the test of pyrolysis of coal Coking Process, use a kind of test unit testing pyrolysis of coal Coking Process, use concrete steps as follows:
Step one, preparation coal sample, the coal of granularity <6mm is added in comminutor at normal temperatures and pressures and is crushed to granularity <1mm, then the coal sample after pulverizing is allocated into moisture fully to mix and make coal blending moisture be load stove from the top of test unit after 4-6%, and with flat board by the coal sample compacting side of the being formed body coal sample of loading;
Step 2, pyrolysis coking, installs sealing mechanism after installing coal sample, opens halogen light source, by regulating the intensity of light source controller be installed on outside stove, makes industrial camera can collect procedural image clearly.The inert gas of 3-6L/min is passed into from draft tube, open condenser gas bleeding of bleeding, open the programmed control of resistance wire gauge tap and be warming up to 1100 DEG C, be greater than 450-650 DEG C of heating rate at 200-450 DEG C of stage heating rate, be less than more than 650 DEG C stage heating rates;
Step 3, image data, to expand when coal sample heats by given temperature in heating furnace, thus promotion activity quartz glass sidewall is moved, directly swell value is measured by scale, and pressure expansion instrument can be utilized to measure the pyrolysis of coal Coking Process swelling pressure, in heating process, utilize industrial camera to carry out real-time online image acquisition to coal Coking Process sample, processing procedure image obtains coal sample linear expansion value at this temperature, then by calculating the expansivity of coal sample.
According to a kind of test method of testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
Be set as that 3 DEG C/min, a 450-650 DEG C heating rate is set as 2.5 DEG C/min at 200-450 DEG C of stage heating rate, all the other stages are 4 DEG C/min.
According to a kind of test method of testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
Obtaining coal sample is that 190-220mm is square.
According to a kind of test method of testing pyrolysis of coal Coking Process of the present invention, it is characterized in that, described test unit comprises that furnace bottom is rectangle, sidewalls vertical, furnace roof are the body of heater of arch, the front side of described body of heater and left side sidewall are furnace wall, right side and rear side sidewall are quartz glass sidewall, and wherein the quartz glass sidewall on right side is the movable quartz glass sidewall (11) being arranged on slide rail, can moving forward and backward;
Described furnace roof top is formed with peep-hole (5);
Described a kind of test unit testing pyrolysis of coal Coking Process also comprises,
Be arranged at the electric furnace heating wire (9) in the furnace wall of side, be arranged at the heat-insulation layer outside described body of heater, be arranged at the pressure expansion instrument (16) in described movable quartz glass sidewall (11) outside, be arranged at the scale (18) of described movable quartz glass sidewall (11) below, be arranged at the top quartz glass (4) of described peep-hole (5) top, be arranged at the industrial camera (17) of top, described top quartz glass (4)
Measure pyrolysis of coal swell value by scale 18 in temperature-rise period, measure the pyrolysis of coal swelling pressure by pressure expansion instrument 16, just can be obtained maximum swelling rate and the maximum swelling pressure of lump coal by computer disposal.
According to a kind of test method of testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
Described heat-insulation layer comprises: to be arranged on the downside of described furnace bottom and bottom heat-insulation layer (14) outside described furnace wall, the top heat-insulation layer (2) of all sides of furnace roof, is arranged at the detachable heat-insulation layer (13) of described quartz glass sidewall outside.
According to a kind of test method of testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
The inclined-plane of described furnace roof is provided with Halogen lamp LED (7), described body of heater outer setting has the intensity of light controller controlling described Halogen lamp LED.
According to a kind of test method of testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
Be formed with the purging slit (6) of height 4-6mm between described top quartz glass and described peep-hole, described purging slit (6) is connected with the draft tube (1) of leading to described body of heater outside, diameter is 4-6mm.
According to a kind of test method of testing pyrolysis of coal Coking Process of the present invention, it is characterized in that:
Be provided with above the furnace wall of described left side lead to body of heater outside, diameter is 2-4mm goes out air cleft (7), described in go out the externally ported of air cleft (7) and be provided with condenser of bleeding (15).
According to the present invention, adopt real time image collection can reconstruction processes behavioral trait, make process visualization, thus the expansion of directly perceived, vivid coal Coking Process can be observed, obtain coal expansion process pressure, the understanding to coal its expansion characteristics and coal tar metamorphosis in heating Coking Process can be improved.
The test unit testing pyrolysis of coal Coking Process by a kind of and method can be good at detecting the pyrolysis of coal under different temperatures and different heating velocity conditions and degasification process, expansion behavior and expansion characteristics, thus provide guidance for the use of coal in process of coking, also provide a kind of new method for resolving carbonization chamber coking process simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of test unit schematic diagram testing pyrolysis of coal Coking Process;
Wherein 1 is draft tube; 2 is upper heat-insulation layer; 3 is sealing mechanism; 4 is top quartz glass; 5 is peep-hole; 6 for purging slit; 7 for going out air cleft; 8 is Halogen lamp LED; 9 is electric furnace heating wire; 10 is the bed of material; 11 is movable quartz glass sidewall; 12 is galvanic couple jack; 11 is detachable heat-insulation layer; 14 is bottom heat-insulation layer; 15 is condenser of bleeding; 16 is pressure expansion instrument; 17 is industrial camera; 18 is scale.
Embodiment
Embodiment 1
Be 13.11% by ash content, fixed carbon content is 61.93%, volatile content is 23.87%, moisture be 1.09% the mixed coal being less than 6mm be crushed to and be less than 1mm, allocate moisture into and make coal blending moisture be add in stove after 4% to ensure that volume is 200mm*200mm*200mm.
By regulating the intensity of light source controller be installed on outside stove, make industrial camera 17 can collect procedural image clearly.The N2 gas of 3L/min is passed into from draft tube 1, open condenser 15 of bleeding and ensure that gas is discharged, open the programmed control of resistance wire gauge tap and be warming up to target temperature, 3 DEG C/min is set as at 200-450 DEG C of stage heating rate, 450-650 DEG C of heating rate is set as 2.5 DEG C/min, all the other stages are 4 DEG C/min, pyrolysis of coal swell value is measured by scale 18 in temperature-rise period, the pyrolysis of coal swelling pressure are measured by pressure expansion instrument 16, the maximum swelling rate that just can be obtained coal by computer disposal is 4.3%, and to record maximum swelling pressure be 3.33kPa.
Embodiment 2
Be 16.27% by ash content, fixed carbon content is 59.67%, volatile content is 23.21%, moisture be 0.85% the mixed coal being less than 6mm be crushed to and be less than 1mm, allocate moisture into and make coal blending moisture be add in stove after 5% to ensure that volume is 200mm*200mm*200mm.
By regulating the intensity of light source controller be installed on outside stove, make industrial camera 17 can collect procedural image clearly.The Ar gas of 4L/min is passed into from draft tube 1, open condenser 15 of bleeding and ensure that gas is discharged, open the programmed control of resistance wire gauge tap and be warming up to target temperature, 3 DEG C/min is set as at 200-450 DEG C of stage heating rate, 450-650 DEG C of heating rate is set as 2.5 DEG C/min, all the other stages are 4 DEG C/min, pyrolysis of coal swell value is measured by scale 18 in temperature-rise period, measure the pyrolysis of coal swelling pressure by pressure expansion instrument 16, just can obtain the maximum swelling rate 4.15% of lump coal by computer disposal and maximum swelling pressure is 3.16kPa.
Embodiment 3
Be 10.11% by ash content, fixed carbon content is 66.93%, volatile content is 21.87%, moisture be 1.09% the mixed coal being less than 6mm be crushed to and be less than 1mm, allocate moisture into and make coal blending moisture be add in stove after 5% to ensure that volume is 200mm*200mm*200mm.
By regulating the intensity of light source controller be installed on outside stove, make industrial camera 17 can collect procedural image clearly.The Ar gas of 5L/min is passed into from draft tube 1, open condenser 15 of bleeding and ensure that gas is discharged, open the programmed control of resistance wire gauge tap and be warming up to target temperature, 3 DEG C/min is set as at 200-450 DEG C of stage heating rate, 450-650 DEG C of heating rate is set as 2.5 DEG C/min, all the other stages are 4 DEG C/min, pyrolysis of coal swell value is measured by scale 18 in temperature-rise period, measure the pyrolysis of coal swelling pressure by pressure expansion instrument 16, the maximum swelling rate that just can obtain lump coal by computer disposal be 4.65% and maximum swelling pressure be 13.65kPa.
Embodiment 4
Be 11.10% by ash content, fixed carbon content is 76.24%, volatile content is 11.39%, moisture be 1.27% the mixed coal being less than 6mm be crushed to and be less than 1mm, allocate moisture into and make coal blending moisture be add in stove after 6% to ensure that volume is 200mm*200mm*200mm.
By regulating the intensity of light source controller be installed on outside stove, make industrial camera 17 can collect procedural image clearly.The He gas of 6L/min is passed into from draft tube 1, open condenser 15 of bleeding and ensure that gas is discharged, open the programmed control of resistance wire gauge tap and be warming up to target temperature, 3 DEG C/min is set as at 200-450 DEG C of stage heating rate, 450-650 DEG C of heating rate is set as 2.5 DEG C/min, all the other stages are 4 DEG C/min, pyrolysis of coal swell value is measured by scale 18 in temperature-rise period, measure the pyrolysis of coal swelling pressure by pressure expansion instrument 16, the maximum swelling rate that just can obtain lump coal by computer disposal be 5.55% and maximum swelling pressure be 55.7kPa.
According to the present invention, adopt real time image collection can reconstruction processes behavioral trait, make process visualization, thus the expansion of directly perceived, vivid coal Coking Process can be observed, obtain coal expansion process pressure, the understanding to coal its expansion characteristics and coal tar metamorphosis in heating Coking Process can be improved.
The test unit testing pyrolysis of coal Coking Process by a kind of and method can be good at detecting the pyrolysis of coal under different temperatures and different heating velocity conditions and degasification process, expansion behavior and expansion characteristics, thus provide guidance for the use of coal in process of coking, also provide a kind of new method for resolving carbonization chamber coking process simultaneously.
Claims (8)
1. test a test unit for pyrolysis of coal Coking Process, comprise that furnace bottom is rectangle, sidewalls vertical, furnace roof are the body of heater of arch, it is characterized in that:
The front side of described body of heater and left side sidewall are furnace wall, and right side and rear side sidewall are quartz glass sidewall, and wherein the quartz glass sidewall on right side is the movable quartz glass sidewall (11) being arranged on slide rail, can moving forward and backward;
Described furnace roof top is formed with peep-hole (5);
Described a kind of test unit testing pyrolysis of coal Coking Process also comprises,
Be arranged at the electric furnace heating wire (9) in the furnace wall of side, be arranged at the heat-insulation layer outside described body of heater, be arranged at the pressure expansion instrument (16) in described movable quartz glass sidewall (11) outside, be arranged at the scale (18) of described movable quartz glass sidewall (11) below, be arranged at the top quartz glass (4) of described peep-hole (5) top, be arranged at the industrial camera (17) of top, described top quartz glass (4)
Measure pyrolysis of coal swell value by scale 18 in temperature-rise period, measure the pyrolysis of coal swelling pressure by pressure expansion instrument 16, just can be obtained maximum swelling rate and the maximum swelling pressure of lump coal by computer disposal.
2. a kind of test unit testing pyrolysis of coal Coking Process according to claim 1, is characterized in that:
Described heat-insulation layer comprises: to be arranged on the downside of described furnace bottom and bottom heat-insulation layer (14) outside described furnace wall, the top heat-insulation layer (2) of all sides of furnace roof, is arranged at the detachable heat-insulation layer (13) of described quartz glass sidewall outside.
3. a kind of test unit testing pyrolysis of coal Coking Process according to claim 1, is characterized in that:
The inclined-plane of described furnace roof is provided with Halogen lamp LED (7), described body of heater outer setting has the intensity of light controller controlling described Halogen lamp LED.
4. a kind of test unit testing pyrolysis of coal Coking Process according to claim 1, is characterized in that:
Be formed with the purging slit (6) of height 4-6mm between described top quartz glass and described peep-hole, described purging slit (6) is connected with the draft tube (1) of leading to described body of heater outside, diameter is 4-6mm.
5. a kind of test unit testing pyrolysis of coal Coking Process according to claim 1, is characterized in that:
Be provided with above the furnace wall of described left side lead to body of heater outside, diameter is 2-4mm goes out air cleft (7), described in go out the externally ported of air cleft (7) and be provided with condenser of bleeding (15).
6. test a method for the test of pyrolysis of coal Coking Process, use the test unit testing pyrolysis of coal Coking Process described in a kind of any one of claim 1-5, concrete steps are as follows:
Step one, preparation coal sample, the coal of granularity <6mm is added in comminutor at normal temperatures and pressures and is crushed to granularity <1mm, then the coal sample after pulverizing is allocated into moisture fully to mix and make coal blending moisture be load stove from the top of test unit after 4-6%, and with flat board by the coal sample compacting side of the being formed body coal sample of loading;
Step 2, pyrolysis coking, installs sealing mechanism after installing coal sample, opens halogen light source, by regulating the intensity of light source controller be installed on outside stove, makes industrial camera can collect procedural image clearly.The inert gas of 3-6L/min is passed into from draft tube, open condenser gas bleeding of bleeding, open the programmed control of resistance wire gauge tap and be warming up to 1100 DEG C, be greater than 450-650 DEG C of heating rate at 200-450 DEG C of stage heating rate, be less than more than 650 DEG C stage heating rates;
Step 3, image data, to expand when coal sample heats by given temperature in heating furnace, thus promotion activity quartz glass sidewall is moved, directly swell value is measured by scale, and pressure expansion instrument can be utilized to measure the pyrolysis of coal Coking Process swelling pressure, in heating process, utilize industrial camera to carry out real-time online image acquisition to coal Coking Process sample, processing procedure image obtains coal sample linear expansion value at this temperature, then by calculating the expansivity of coal sample.
7. a kind of test method of testing pyrolysis of coal Coking Process according to claim 6, is characterized in that:
Be set as that 3 DEG C/min, a 450-650 DEG C heating rate is set as 2.5 DEG C/min at 200-450 DEG C of stage heating rate, all the other stages are 4 DEG C/min.
8. a kind of test method of testing pyrolysis of coal Coking Process according to claim 6, is characterized in that:
Obtaining coal sample is that 190-220mm is square.
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| CN109212157A (en) * | 2018-09-21 | 2019-01-15 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of detection method and its application of the single grade coal bulbs of pressure |
| CN112730545A (en) * | 2020-12-22 | 2021-04-30 | 华中科技大学 | Online prediction method and system for electrode coking amount in biomass pyrolysis oil electrolysis process |
| CN112730545B (en) * | 2020-12-22 | 2021-10-15 | 华中科技大学 | Online prediction method and system for electrode coking amount in biomass pyrolysis oil electrolysis process |
| CN113884577A (en) * | 2021-09-28 | 2022-01-04 | 西安科技大学 | Device and method for real-time monitoring of pyrolysis of oil-rich coal |
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