Experimental device and method for measuring dry quenching burn-out rate

Abstract

The invention relates to the technical field of dry quenching, in particular to an experimental device and method for measuring the burn-out rate of dry quenching. Comprising a high-frequency ceramic core hearth furnace, an interface, a thermocouple and a purification mechanism, the interface is fixedly connected to the high-frequency ceramic core hearth furnace, and the functional cover plate is fixedly connected to the interface; a carbon monoxide breather pipe, a carbon dioxide breather pipe, an oxygen breather pipe and a nitrogen breather pipe which are communicated with the interior of the high-frequency ceramic core hearth furnace are arranged on the functional cover plate, and electromagnetic valves are arranged on the breather pipes; the thermocouple penetrates through the functional cover plate and is movably connected with the functional cover plate; and the purification mechanism is fixedly connected to the outer wall of the high-frequency ceramic core hearth furnace. The gas flow can be adjusted in real time according to actual circulating gas components in the dry quenching furnace, and the coke burn-out rate under the circulating atmosphere can be rapidly and accurately calculated.

Description

Technical Field

[0001] The invention relates to the technical field of dry quenching coke, in particular to an experimental device and method for measuring a dry quenching coke burning rate. Background Art

[0002] During the CDQ process, the burning of coke is mainly due to the air leaking into the CDQ furnace during the gas circulation process and the air brought in with the red coke. These air react with the coke, causing part of the coke to be burned. In addition, the collision or friction of the coke in the CDQ furnace will also increase the coke powder rate, which will lead to burning.

[0003] The CDQ burn rate refers to the loss rate of coke during the CDQ process. The CDQ burn rate is an important indicator for evaluating the operation of the CDQ system. Accurate and rapid calculation of the burn rate is crucial to improving CDQ operations and increasing coke production and quality.

[0004] At present, the commonly used methods for calculating the burn-down rate in coking plants include the oxygen atom conservation method, the energy conservation method and the mass conservation method. However, since the above methods have certain errors in data collection and lags, they cannot reflect the CDQ burn-down rate in a timely and accurate manner. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, an experimental device and method for determining the dry quenching coke burnout rate are provided, which can adjust the gas flow rate in real time according to the actual circulating gas composition in the dry quenching furnace, and can quickly and accurately calculate the coke burnout rate under the circulating atmosphere.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An experimental device for measuring the dry quenching coke loss rate comprises a high-frequency ceramic core furnace, an interface, a thermocouple and a purification mechanism; the interface is fixedly connected to the high-frequency ceramic core furnace, and a functional cover is fixedly connected to the interface; the functional cover is provided with a carbon monoxide ventilation pipe, a carbon dioxide ventilation pipe, an oxygen ventilation pipe and a nitrogen ventilation pipe which are communicated with the interior of the high-frequency ceramic core furnace, and solenoid valves are provided on the ventilation pipes; the thermocouple passes through the functional cover and is movably connected to the functional cover; the purification mechanism is fixedly connected to the outer wall of the high-frequency ceramic core furnace.

[0008] Furthermore, a furnace is provided inside the high-frequency ceramic core furnace, a high-temperature resistant partition is fixed to the inner wall of the furnace, and the furnace is connected to the purification mechanism.

[0009] Furthermore, the high temperature resistant partition is provided with ventilation holes.

[0010] Furthermore, the carbon monoxide ventilation pipe includes a first connecting pipe, a first mounting shell, a second mounting shell, a flame arrester and a second connecting pipe; the first mounting shell is fixedly connected to the lower end of the first connecting pipe, and the second mounting shell is fixedly connected to the upper end of the second connecting pipe; the inner cavity of the second mounting shell is embedded with a flame arrester, and the first mounting shell is sleeved on the upper end of the flame arrester and connected to the second mounting shell.

[0011] Furthermore, flanges are provided at the ends of the first installation shell and the second installation shell, and the first installation shell and the second installation shell are connected via the flanges and bolts.

[0012] Furthermore, a rubber sealing layer is fixedly connected to the outer circumferential surface of the flame arrester, and the rubber sealing layer is in close contact with the inner walls of the first mounting shell and the second mounting shell.

[0013] Furthermore, the purification mechanism includes a mounting frame, an air extractor, a pressure-stabilizing ventilation pipe, an L-shaped elbow, a storage pipe, a mesh storage plate and an activated carbon bag; the mounting frame is fixedly connected to the outer wall of the high-frequency ceramic core furnace, the air extractor is fixedly connected to the mounting frame, the air inlet of the air extractor is connected to the pressure-stabilizing ventilation pipe, and the pressure-stabilizing ventilation pipe is connected to the high-frequency ceramic core furnace;

[0014] One end of the L-shaped elbow is fixedly connected to the exhaust port of the vacuum pump, and the storage tube is fixedly connected to the other end of the L-shaped elbow; the mesh storage board is fixedly connected to the inner wall of the storage tube, and the activated carbon bag is placed on the mesh storage board.

[0015] A method for determining the dry quenching coke loss rate specifically comprises the following steps:

[0016] S1: Sample preparation: the test sample coke is made into approximately spherical particles of 20 to 30 mm;

[0017] S2: Drying: put the coke sample into a dryer at 180-200°C for more than 2 hours;

[0018] S3: Weighing: weigh 100-300 g of the dried coke sample and record its mass as M1, in g;

[0019] S4: Load the sample and heat it up, lay the weighed sample flat on the high temperature resistant partition inside the high frequency ceramic core furnace, start the heating device of the high frequency ceramic core furnace, and monitor the temperature inside the high frequency ceramic core furnace through a thermocouple;

[0020] When the temperature reaches 400°C, nitrogen is introduced at a flow rate of 1L / min; to prevent the coke from reacting with air, when the temperature rises to 950-1050°C, the gas flow rate is adjusted, wherein the volume fraction of CO ≤ 10%, O2 ≤ 1%, CO2 is 10%-20%, and the rest is N2, and the temperature is kept constant for 4-8 hours;

[0021] S5: Cooling and weighing. After the constant temperature is completed, wait for the furnace to cool to room temperature, take out the coke and weigh it again, and record its mass as M2, in g;

[0022] S6: Calculate the burnout rate, burnout rate

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention is provided with a high-frequency ceramic core furnace for placing test samples, and a functional cover plate is fixedly connected to the high-frequency ceramic core furnace. The functional cover plate is provided with a carbon monoxide vent pipe, a carbon dioxide vent pipe, an oxygen vent pipe and a nitrogen vent pipe which are connected to the inside of the high-frequency ceramic core furnace, and each of the vent pipes is provided with an electromagnetic valve; carbon monoxide, carbon dioxide, oxygen and nitrogen can be introduced into the high-frequency ceramic core furnace through the vent pipes, and the gas flow rate can be adjusted in real time according to the actual circulating gas composition in the dry quenching furnace. At the same time, a thermocouple for monitoring the temperature in the high-frequency ceramic core furnace and a purification mechanism for ensuring the safety of the test are provided. The method described in the present invention can quickly and accurately calculate the coke burnout rate under the circulating atmosphere, providing a technical reference for on-site dry quenching furnace operation.

[0025] 2. The purification mechanism of the present invention is provided with an activated carbon bag, which uses the activated carbon to adsorb harmful gases discharged during the test process, which can greatly reduce the pollution to the laboratory environment and reduce the harm to the human body.

[0026] 3. Since the carbon monoxide vent pipe is different from the carbon dioxide vent pipe, the oxygen vent pipe and the nitrogen vent pipe, the present invention installs a flame arrester inside the carbon monoxide vent pipe. When the CO gas burns due to an operating error, the burning flame will be blocked by the flame arrester to avoid causing the CO gas pipeline to explode, greatly reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the three-dimensional explosion structure of the present invention.

[0029] Figure 3 It is a schematic diagram of the structure of the carbon monoxide ventilation pipe of the present invention.

[0030] Figure 4 It is a schematic diagram of the internal structure of the storage tube of the purification mechanism of the present invention.

[0031] Figure 5 This is a cross-sectional view of the high-frequency ceramic core furnace of the present invention.

[0032] In the figure: 1. high-frequency ceramic core furnace; 11. furnace; 12. high temperature resistant partition; 121. vent; 2. interface; 3. functional cover; 31. carbon monoxide ventilation pipe; 311. first connecting pipe; 312. first mounting shell; 313. second mounting shell; 314. flame arrester; 3141. rubber sealing layer; 315. second connecting pipe; 316. flange; 32. carbon dioxide ventilation pipe; 33. oxygen ventilation pipe; 34. nitrogen ventilation pipe; 35. solenoid valve; 4. thermocouple; 5. purification mechanism; 51. mounting frame; 52. vacuum pump; 53. pressure-stabilizing ventilation pipe; 54. L-shaped elbow; 55. storage pipe; 56. mesh storage board; 57. activated carbon bag. DETAILED DESCRIPTION

[0033] The present invention discloses an experimental device and method for determining the dry quenching coke loss rate. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve it. It should be particularly pointed out that all similar substitutions and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the method and application described in this article without departing from the content, spirit and scope of the present invention to realize and apply the technology of the present invention.

[0034] like Figure 1-5 As shown, an experimental device for measuring the dry quenching coke loss rate includes a high-frequency ceramic core furnace 1, which is cylindrical and has a vertical axis. The upper end of the high-frequency ceramic core furnace 1 is fixedly connected with an interface 2, and the upper end of the interface 2 is fixedly connected with a functional cover plate 3, and the upper end of the functional cover plate 3 is fixedly connected with a carbon monoxide ventilation pipe 31, a carbon dioxide ventilation pipe 32, an oxygen ventilation pipe 33 and a nitrogen ventilation pipe 34, and the carbon monoxide ventilation pipe 31, the carbon dioxide ventilation pipe 32, the oxygen ventilation pipe 33 and the nitrogen ventilation pipe 34 are all provided with an electromagnetic valve 35, and the upper end of the functional cover plate 3 is penetrated and movably connected with a thermocouple 4, and the outer circumferential surface of the high-frequency ceramic core furnace 1 is fixedly connected with a purification mechanism 5.

[0035] When in use, place the sample coke in a high-frequency ceramic core furnace 1, install the functional cover plate 3 and heat it up. When the coke is heated to 950-1050°C, introduce O2, CO, CO2 and N2 into the furnace. The waste gas generated during the experiment is discharged to the purification mechanism 5.

[0036] The solenoid valve 35 controls the flow of each gas, and the thermocouple 4 is used to monitor the temperature in the high-frequency ceramic core furnace 1 .

[0037] like Figure 1-3As shown, the carbon monoxide ventilation pipe 31 includes a first connecting pipe 311, a first mounting shell 312, a second mounting shell 313, a flame arrester 314 and a second connecting pipe 315. The lower end of the first connecting pipe 311 is fixedly connected to the first mounting shell 312, the upper end of the second connecting pipe 315 is fixedly connected to the second mounting shell 313, the inner cavity of the first mounting shell 313 is embedded with the flame arrester 314, and the first mounting shell 312 is sleeved on the upper end of the flame arrester 314 and connected to the second mounting shell 313.

[0038] When in use, the carbon monoxide ventilation pipe 31 is different from the carbon dioxide ventilation pipe 32, the oxygen ventilation pipe 33 and the nitrogen ventilation pipe 34. A flame arrester 314 is installed inside the carbon monoxide ventilation pipe 31. When an operating error occurs and causes the CO gas to burn, the burning flame will be blocked by the flame arrester 314 to avoid causing an explosion in the CO gas pipeline, greatly reducing safety hazards.

[0039] like Figure 3 As shown, the outer circumferential surfaces of the first mounting shell 312 and the second mounting shell 313 are fixedly connected with flanges 316, and the first mounting shell 312 and the second mounting shell 313 are fixed to the flanges 316 by bolts.

[0040] When in use, the first installation shell 312 and the second installation shell 313 can be disassembled by unscrewing the bolts, so that personnel can disassemble and replace the flame arrester 314 in the second installation shell 313.

[0041] like Figure 3 As shown, a rubber sealing layer 3141 is fixedly connected to the outer circumferential surface of the flame arrester 314 , and the rubber sealing layer 3141 is in close contact with the inner walls of the first installation shell 312 and the second installation shell 313 .

[0042] When in use, the sealing between the flame arrester 314 and the first mounting shell 312 and the second mounting shell 313 is greatly improved to prevent the burning CO from entering the pipeline from the connection gap, further reducing safety hazards.

[0043] like Figure 1 and 4As shown, the purification mechanism 5 includes a mounting frame 51, an air extractor 52, a pressure-stabilizing ventilation pipe 53, an L-shaped elbow pipe 54, a storage pipe 55, a mesh storage plate 56 and an activated carbon bag 57. The mounting frame 51 is fixedly connected to the outer wall of the high-frequency ceramic core furnace 1, the upper end of the mounting frame 51 is fixedly connected with the air extractor 52, the air inlet of the air extractor 52 is fixedly connected with the pressure-stabilizing ventilation pipe 53, the pressure-stabilizing ventilation pipe 53 is connected with the high-frequency ceramic core furnace 1, the exhaust port of the air extractor 52 is fixedly connected with the L-shaped elbow pipe 54, one end of the L-shaped elbow pipe 54 is fixedly connected with the storage pipe 55, the inner wall of the storage pipe 55 is fixedly connected with the mesh storage plate 56, and the upper end of the mesh storage plate 56 is placed with the activated carbon bag 57.

[0044] When in use, the waste gas generated by the experiment is discharged to the outside through the pressure-stabilizing ventilation pipe 36, and the exhausted waste gas will be adsorbed by the vacuum fan 52 in cooperation with the pressure-stabilizing ventilation pipe 53. After the adsorbed waste gas passes through the pressure-stabilizing ventilation pipe 53, it is finally discharged into the receiving pipe 55 from the L-shaped elbow 54 on the vacuum fan 52. After the waste gas enters the receiving pipe 55, the activated carbon bag 57 will adsorb the harmful molecules, which can greatly reduce the pollution to the laboratory environment and reduce the harm to the health of personnel.

[0045] like Figure 5 As shown, a furnace chamber 11 is provided inside the high-frequency ceramic core furnace 1, a high-temperature resistant partition 12 is fixedly connected to the inner wall of the furnace chamber 11, a vent hole 121 is opened on the high-temperature resistant partition 12, and the furnace chamber 11 is connected to the purification mechanism 5.

[0046] When in use, the sample coke is placed on the high temperature resistant partition 12 , and after the gas is introduced for reaction, the waste gas generated enters the purification mechanism 5 through the vent holes 121 on the high temperature resistant partition 12 .

[0047] Embodiment 1:

[0048] This embodiment provides a method for determining the dry quenching coke loss rate, which is implemented based on the above device and specifically includes the following steps:

[0049] S1: Sample preparation: The test sample coke is made into 20 mm spherical particles.

[0050] S2: Drying: Place the coke sample in a dryer, adjust the temperature to 180°C, and dry for 2 hours.

[0051] S3: Weighing. Weigh 100 g of the dried coke sample and record its mass.

[0052] S4: Load the sample and heat up. Place the weighed sample flat on the baffle and start the device to heat up. When the temperature reaches 400°C, introduce nitrogen at a flow rate of 1L / min. When the temperature rises to 1000°C, adjust the gas volume fraction as shown in Table 1, the mixed gas flow rate is 10L / min, and keep the temperature constant for 6 hours.

[0053] Table 1 Gas volume fraction

[0054] gas CO <![CDATA[O2]]> <![CDATA[CO2]]> <![CDATA[N2]]> Volume fraction / % 5 0.5 16 78.5

[0055] S5: Cooling and weighing. After the constant temperature is completed, wait for the furnace to cool to room temperature, take out the coke and weigh it again, and its mass is 97.67g.

[0056] S6: Calculate the burning rate. Burning rate α = (100-97.67) / 100×100% = 2.33%.

[0057] S7: Result verification. The energy conservation method of CDQ system was used to verify the result, and the result was 2.27%, with a relative error of 2.6%.

[0058] Embodiment 2:

[0059] This embodiment provides a method for determining the dry quenching coke loss rate, which is implemented based on the above device and specifically includes the following steps:

[0060] S1: Sample preparation: The test sample coke is made into 25 mm spherical particles.

[0061] S2: Drying. Put the coke sample into a dryer, adjust the temperature to 190°C, and dry for 2 hours.

[0062] S3: Weighing. Weigh 200 g of the dried coke sample and record its mass.

[0063] S4: Load the sample and heat up. Place the weighed sample flat on the baffle and start the device to heat up. When the temperature reaches 400°C, introduce nitrogen at a flow rate of 1L / min. When the temperature rises to 950°C, adjust the gas volume fraction as shown in Table 2, the mixed gas flow rate is 10L / min, and keep the temperature constant for 4 hours.

[0064] Table 2 Gas volume fraction

[0065] gas CO <![CDATA[O2]]> <![CDATA[CO2]]> <![CDATA[N2 <!-- 4 -->]]> Volume fraction / % 7.5 1 10 81.5

[0066] S5: Cooling and weighing. After the constant temperature is completed, wait for the furnace to cool to room temperature, take out the coke and weigh it again, and its mass is 195.62g.

[0067] S6: Calculate the burning rate. Burning rate α = (200-195.62) / 100×100% = 2.19%.

[0068] S7: Result verification. The energy conservation method of CDQ system was used to verify the result, and the result was 2.22%, with a relative error of 1.4%.

[0069] Embodiment 3:

[0070] This embodiment provides a method for determining the dry quenching coke loss rate, which is implemented based on the above device and specifically includes the following steps:

[0071] S1: Sample preparation: The test sample coke is made into 30 mm spherical particles.

[0072] S2: Drying: Place the coke sample in a dryer, adjust the temperature to 200°C, and dry for 2 hours.

[0073] S3: Weighing. Weigh 300 g of the dried coke sample and record its mass.

[0074] S4: Load the sample and heat up. Place the weighed sample flat on the baffle and start the device to heat up. When the temperature reaches 400°C, introduce nitrogen at a flow rate of 1L / min. When the temperature rises to 1050°C, adjust the gas volume fraction as shown in Table 3, the mixed gas flow rate is 10L / min, and keep the temperature constant for 5 hours.

[0075] Table 3 Gas volume fraction

[0076] gas CO <![CDATA[O2]]> <![CDATA[CO2]]> <![CDATA[N2]]> Volume fraction / % 10 0.3 20 69.7

[0077] S5: Cooling and weighing. After the constant temperature is completed, wait for the furnace to cool to room temperature, take out the coke and weigh it again, and its mass is 292.32g.

[0078] S6: Calculate the burning rate. Burning rate α = (300-292.32) / 100×100% = 2.56%.

[0079] S7: Result verification. The energy conservation method of CDQ system was used to verify the result, and the result was 2.51%, with a relative error of 2%.

[0080] The present invention provides an experimental device and method for determining the dry quenching coke burnout rate, which can adjust the gas flow rate in real time according to the actual circulating gas composition in the dry quenching furnace, and can quickly and accurately calculate the coke burnout rate under the circulating atmosphere, providing a technical reference for the on-site dry quenching furnace operation. In addition, a flame arrester is installed inside the carbon monoxide ventilation pipe of the present invention. When a person makes an operating error and causes the CO gas to burn, the burning flame will be blocked by the flame arrester to avoid causing the CO gas pipeline to explode, greatly reducing safety hazards.

[0081] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An experimental device for measuring the dry quenching coke loss rate, characterized in that: Including high frequency ceramic core furnace, interface, thermocouple and purification mechanism; The interface is fixedly connected to the high-frequency ceramic core furnace, and the functional cover is fixedly connected to the interface; The functional cover plate is provided with a carbon monoxide ventilation pipe, a carbon dioxide ventilation pipe, an oxygen ventilation pipe and a nitrogen ventilation pipe which are connected to the interior of the high-frequency ceramic core furnace, and each of the ventilation pipes is provided with a solenoid valve; The thermocouple passes through the functional cover plate and is movably connected to the functional cover plate; The purification mechanism is fixedly connected to the outer wall of the high-frequency ceramic core furnace.

2. The experimental device for measuring the dry quenching coke loss rate according to claim 1 is characterized in that: A furnace is provided inside the high-frequency ceramic core furnace, a high-temperature resistant partition is fixedly connected to the inner wall of the furnace, and the furnace is connected to the purification mechanism.

3. The experimental device for measuring the dry quenching coke loss rate according to claim 2 is characterized in that: The high temperature resistant partition is provided with ventilation holes.

4. The experimental device for measuring the dry quenching coke loss rate according to claim 1 is characterized in that: The carbon monoxide ventilation pipe comprises a first connecting pipe, a first mounting shell, a second mounting shell, a flame arrester and a second connecting pipe; The first mounting shell is fixedly connected to the lower end of the first connecting tube, and the second mounting shell is fixedly connected to the upper end of the second connecting tube; The inner cavity of the second installation shell is embedded with a flame arrester, and the first installation shell is sleeved on the upper end of the flame arrester and connected to the second installation shell.

5. The experimental device for measuring the dry quenching coke loss rate according to claim 4 is characterized in that: The ends of the first installation shell and the second installation shell are both provided with flanges, and the first installation shell and the second installation shell are connected by the flanges and bolts.

6. The experimental device for measuring the dry quenching coke loss rate according to claim 4, characterized in that: A rubber sealing layer is fixedly connected to the outer circumferential surface of the flame arrester, and the rubber sealing layer is in close contact with the inner walls of the first installation shell and the second installation shell.

7. The experimental device for measuring the dry quenching coke loss rate according to claim 1 is characterized in that: The purification mechanism includes a mounting frame, an air extractor, a pressure-stabilizing ventilation pipe, an L-shaped elbow, a storage pipe, a mesh storage plate and an activated carbon bag; The mounting frame is fixedly connected to the outer wall of the high-frequency ceramic core furnace, the air extractor is fixedly connected to the mounting frame, the air inlet of the air extractor is connected to the pressure-stabilizing ventilation pipe, and the pressure-stabilizing ventilation pipe is connected to the high-frequency ceramic core furnace; One end of the L-shaped elbow is fixedly connected to the exhaust port of the air extractor, and the receiving pipe is fixedly connected to the other end of the L-shaped elbow; The mesh storage plate is fixedly connected to the inner wall of the storage tube, and the activated carbon bag is placed on the mesh storage plate.

8. A method for measuring the dry quenching coke loss rate, implemented based on the experimental device for measuring the dry quenching coke loss rate according to any one of claims 1 to 7, characterized in that: The specific steps include: S1: Sample preparation: the test sample coke is made into particles with a particle size of 20 to 30 mm; S2: Drying: put the coke sample into a dryer at a temperature of 180-200°C and dry for more than 2 hours; S3: Weighing: weigh 100-300 g of the dried coke sample and record its mass as M1, in g; S4: Load the sample and heat it up, lay the weighed sample flat on the high temperature resistant partition inside the high frequency ceramic core furnace, start the heating device of the high frequency ceramic core furnace, and monitor the temperature inside the high frequency ceramic core furnace through a thermocouple; When the temperature reaches 400°C, nitrogen is introduced at a flow rate of 1L / min; when the temperature rises to 950-1050°C, the gas flow rate is adjusted, wherein the volume fraction of CO ≤ 10%, O2 ≤ 1%, CO2 is 10%-20%, and the rest is N2, and the temperature is kept constant for 4-8 hours; S5: Cooling and weighing. After the constant temperature is completed, wait for the furnace to cool to room temperature, take out the coke and weigh it again, and record its mass as M2, in g; S6: Calculate the burnout rate, burnout rate 9. The method for determining the dry quenching coke loss rate according to claim 1, characterized in that: In the S1, the particles are spherical.

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