Coke steam gasification reaction and performance detection device

Abstract

The utility model relates to a coke steam gasification reaction and performance detection device which comprises a steam generation device, a reaction device, a gas supply system, an electronic balance, an exhaust system and a control system, the water vapor generating device is an ultrasonic oscillation water vapor generating device. According to the utility model, the thermal performance of coke can be detected under various gas atmospheres, and the water vapor generating device adopts an ultrasonic oscillation principle, so that the problem of water vapor generation can be solved efficiently, safely and environmentally friendly in an energy-saving manner; the detection device is simple in structure and low in manufacturing cost, different blast furnace atmospheres can be simulated through the gas supply system, the mass change of the coke in the reaction process can be monitored on line by means of the electronic balance, meanwhile, other properties (such as strength and structure) of the coke after the experiment is finished are analyzed, and the detection accuracy is improved. Further, the influence of the water vapor gasification reaction on the coke quality is reasonably evaluated.

Description

TECHNICAL FIELD

[0001] The utility model relates to coke quality evaluation technical field especially, relate to a coke water vapor gasification reaction and performance detection device and. BACKGROUND

[0002] Coke is an important raw material for steel production, but the greenhouse gases produced in its gasification process contain carbon dioxide (CO2), methane (CH4), nitrogen oxides (NOx), sulfur oxides (SOx), as well as particulate matter and volatile organic compounds (VOCs) and other harmful substances, which pose a threat to the environment, the ecosystem and human health. Improving the utilization efficiency of coal is of great significance to alleviate the above problems, and the coke gasification reaction performance under water vapor conditions is a key process for efficient utilization of coal. The coke gasification reaction performance under water vapor conditions is affected by temperature, water vapor concentration, coke characteristics, catalyst and pressure, etc. Optimizing these factors can improve reaction efficiency and gas yield and promote clean and efficient utilization of coal. With the increasing environmental protection requirements, accurate detection of coke gasification reaction performance under water vapor conditions is crucial for optimizing coke use, reducing energy consumption and reducing pollution.

[0003] At present, the steel industry aims to improve energy utilization efficiency and continuously optimize the process; the quality and utilization efficiency of coke directly affect the production cost and product quality of steel enterprises. By accurately detecting the behavior characteristics of coke under water vapor conditions, the coal blending scheme can be optimized, coke consumption can be reduced, and energy saving and emission reduction can be achieved. Accurate detection of the gasification reaction performance of coke under water vapor conditions can provide a scientific basis for production organization and process adjustment of steel enterprises, thereby improving production efficiency and economic benefits.

[0004] A Chinese patent application with application number 201810461721.0 discloses a device and method for studying the influence of alkali metals on coke reactivity under water vapor and carbon dioxide conditions. The experimental device includes a heating system, a reaction system, a weighing system, a gas control system, and a water vapor generation system, etc. The coke is placed in a basket and hung below the weighing device by a hanging line; the furnace tube reactor is provided with a thermocouple and a perforated plate; the nitrogen and carbon dioxide flow is controlled by a mass flow controller, and the water solution containing sodium carbonate or potassium carbonate is input into the lower part of the electric resistance furnace for gasification, and the water solution flow is accurately controlled by a peristaltic pump to indirectly control the water vapor flow. The advantage is that water vapor, carbon dioxide and alkali metals are applied to the coke gasification reactivity experiment at the same time, and the water vapor flow and the alkali metal content in the reaction atmosphere are accurately controlled by the peristaltic pump, thereby realizing the experimental study of coke gasification reactivity under the mixed atmosphere of carbon dioxide and water vapor. It aims to explore the influence of alkali metals on coke reactivity under different conditions to better understand the mechanism of alkali metals in the coke gasification process.

[0005] Chinese patent application No. 202210089070.3 discloses a "detection device and method for coke and water vapor and carbon dioxide co-gasification reaction". The detection device includes: a gas supply device, a water vapor generation device, a gasification reaction device, a gas cooling device, a gas purification device, an infrared gas detector and a processor. The gas supply device includes an N2 storage tank and a CO2 storage tank. The water vapor generation device includes a high-temperature heating device and a continuous injection pump. The gasification reaction device includes a heating furnace, a corundum reaction tube and a temperature control thermocouple. The gasification reaction device is connected to the gas cooling device, the gas cooling device is connected to the gas purification device, the gas purification device is connected to the infrared gas detector, and the infrared gas detector, the temperature control thermocouple and the electromagnetic mass flow meter are respectively connected to the processor. It aims to simulate the gasification process of coke in the actual industrial environment, and can accurately distinguish the carbon dissolution reaction and the water gas reaction.

[0006] Chinese patent application No. 201711415675.2 discloses an "experimental system for detecting coke water vapor reactivity". It includes a liquid delivery unit, an evaporation unit and a heating furnace. The liquid delivery unit includes a beaker and a speed-regulated peristaltic pump. The evaporation unit includes a water vapor generator. The heating furnace is provided with a furnace tube, and a weighing balance is arranged at the top of the heating furnace. A sample cage is hung below the weighing balance, and the water vapor generator is vertically arranged inside the furnace tube. The speed-regulated peristaltic pump stably controls the supply amount and speed of distilled water. The upper and lower steady flow sheets of the circular hole in the water vapor generator are staggered to stably evaporate distilled water and prevent splashing. It aims to accurately measure the reactivity of coke in the presence of water vapor.

[0007] Chinese patent application No. 202111465824.2 discloses a "device for measuring high-temperature reaction of coke and water vapor", which is composed of a thermal gravimetric detection unit, a water supply unit, a residual moisture determination unit, a tail gas analysis unit and a process control and data recording unit. The thermal gravimetric detection unit includes a high-temperature electric furnace, an electronic balance, a reaction tube and a thermocouple. The water supply unit includes a micro-metering pump. The residual moisture determination unit includes a moisture absorption tube and a horizontal detection balance. The tail gas analysis unit includes a tail gas analyzer. The process control and data recording unit includes a computer. It is used to measure the melting loss reaction mechanism of coke and water vapor under the condition of simulating hydrogen-rich blast furnace, to make water vapor and coke react uniformly at high temperature through accurate control of water vapor generation and uniform diffusion of water vapor, to ensure the accuracy of data, and to monitor the amount of unreacted water vapor in real time, thereby comprehensively interpreting the reaction process of coke and water vapor. The device can accurately measure the reaction characteristics of coke and water vapor under high-temperature conditions, providing an experimental means for studying the high-temperature gasification behavior of coke.

[0008] At present, there is still a blank in the detection of coke gasification reaction under certain conditions (such as high temperature, high pressure, hydrogen-rich environment). Filling this technical gap, providing more accurate and reliable experimental means for researchers, promoting technological progress, meeting market demand, has become an inevitable choice for the development of the industry. SUMMARY

[0009] The utility model provides a kind of coke water vapor gasification reaction and performance detection device, can detect the thermal state performance of coke under a variety of gas atmosphere, the temperature control range in reaction device is 0~1600 ℃;Water vapor generating device uses ultrasonic oscillation principle, can efficiently, energy-saving, safely, environmentally solve the generation problem of water vapor;Detection device structure is simple, and manufacturing cost is low, can simulate different blast furnace atmosphere by gas supply system, and the mass change of coke in reaction process is monitored on line by means of electronic balance, while the other performance (such as strength, structure etc.) of coke after experiment is ended is analyzed, and then the influence of water vapor gasification reaction on coke quality is reasonably evaluated.

[0010] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0011] A kind of coke water vapor gasification reaction and performance detection device, including water vapor generating device, reaction device, gas supply system, electronic balance, exhaust system and control system;The water vapor generating device is located below reaction device, and water vapor generating device is ultrasonic oscillation water vapor generating device;The reaction device is composed of furnace body, furnace tube and heating element, the furnace tube with two ends closed is equipped in the middle of furnace body, and heating element is arranged in the furnace body outside the periphery of furnace tube, and the hanging basket for containing coke sample is hung in the furnace tube by electronic balance;Ultrasonic oscillation water vapor generating device is connected with the water vapor inlet at the bottom of furnace tube by water vapor delivery pipeline;The gas supply system includes gas supply pipeline and multiple gas supply sources, and the gas supply source is connected with the gas inlet at the bottom of furnace tube by gas supply pipeline;The gas outlet at the top of furnace tube is connected with exhaust system by gas outlet pipeline;The control end of heating element and the signal output end of electronic balance are connected with control system respectively.

[0012] The water vapor generating device is composed of a shell, an ultrasonic generator, an ultrasonic oscillation sheet, a water vapor generating chamber, a water storage tank and a fan arranged in the shell;The water storage tank is arranged above the water vapor generating chamber, and a water outlet pipe is arranged at the bottom of the water storage tank to communicate with the water vapor generating chamber;The ultrasonic oscillation sheet is arranged at the bottom of the water vapor generating chamber, and the ultrasonic generator and the fan are arranged below the water vapor generating chamber, the ultrasonic oscillation sheet is connected with the ultrasonic generator, the fan is connected with the space above the liquid level of the water vapor generating chamber through an air outlet pipe, and an air filter sheet is arranged at the air outlet of the fan;The water vapor generating chamber is connected with the reaction device through a water vapor delivery pipeline;The water vapor generating chamber is also provided with a water level detection element, and the signal output end of the water level detection element is connected with the control system.

[0013] The water vapor conveying pipeline is provided with an electric valve one, and the control end of the electric valve one is connected with the control system.

[0014] The top of the furnace tube is closed by an upper flange, and the bottom of the furnace tube is closed by a lower flange; the outer side of the furnace body is provided with a furnace body heat preservation layer; a thermocouple is arranged in the furnace tube and extends from the upper flange; an electric valve two is arranged on the gas outlet pipeline; and the signal output end of the thermocouple and the control end of the electric valve two are respectively connected with the control system.

[0015] The electronic balance is a recording function electronic balance.

[0016] The gas supply source includes an H2 gas source, a CO gas source, a CO2 gas source and an N2 gas source, and an electric valve three is arranged at the connection position of the gas supply source and the gas supply pipeline; an electric valve four is arranged on the gas supply pipeline; and the control ends of the electric valve three and the electric valve four are respectively connected with the control system.

[0017] The exhaust system includes a gas cooling device and a gas component detector.

[0018] Compared with the prior art, the coke water vapor gasification reaction and performance detection device has the following beneficial effects:

[0019] The coke thermal state performance can be detected under various gas atmospheres, the temperature control range in the reaction device is 0-1600 DEG C, the water vapor generation device adopts the ultrasonic oscillation principle, and the water vapor generation problem can be solved efficiently, energy-savingly, safely and environmentally-friendlyly; the detection device has simple structure and low manufacturing cost, different blast furnace atmospheres can be simulated through the gas supply system, the mass change of the coke in the reaction process is monitored on line by means of the electronic balance, the other performances (such as strength, structure, etc.) of the coke after the experiment is finished are analyzed, and the influence of the water vapor gasification reaction on the coke quality is reasonably evaluated. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the coke water vapor gasification reaction and performance detection device.

[0021] In the drawing: 1. upper flange 2. gas outlet pipeline 3. coke sample 4. heating element 5. furnace tube 6. lower flange 7. electric valve one 8. water level detection element 9. ultrasonic generator 10. power supply 11. ultrasonic oscillation sheet 12. fan 13. air filter sheet 14. water storage tank 15. pipeline heat preservation layer 16. water vapor conveying pipeline 17. gas supply pipeline 18. furnace body heat preservation layer 19. basket 20. thermocouple 21. electronic balance DETAILED DESCRIPTION

[0022] The utility model discloses a further illustrate the specific implementation of the utility model below with the drawings:

[0023] As Figure 1 The utility model discloses a coke water vapor gasification reaction and performance detection device, including water vapor generating device, reaction device, gas supply system, electronic balance 21, exhaust system and control system, the water vapor generating device is located reaction device below, and water vapor generating device is ultrasonic oscillation water vapor generating device, the reaction device is by furnace body, furnace pipe 5 and heating element 4 is composed, and the furnace pipe 5 is equipped with the furnace pipe 5 of two ends closed in the middle part of furnace body, and heating element 4 is equipped in the furnace body of furnace pipe 5 periphery, and the hanging basket 19 for containing coke sample 3 is suspended in the furnace pipe 5 through electronic balance 21, and the ultrasonic oscillation water vapor generating device is connected the water vapor inlet of furnace pipe 5 bottom through water vapor delivery pipeline 16, the gas supply system includes gas supply pipeline and a plurality of gas supply sources, and the gas supply source is connected the gas inlet of furnace pipe 5 bottom through gas supply pipeline 17 respectively, and the top of furnace pipe 5 is equipped with the gas outlet and is connected exhaust system through gas outlet pipeline 2, and the control end of heating element 4, the signal output end of electronic balance 21 is connected control system respectively.

[0024] The water vapor generating device is composed of a shell, an ultrasonic generator 9, an ultrasonic oscillation sheet 11, a water vapor generating chamber, a water storage tank 14 and a fan 12 arranged in the shell, a water storage tank 14 is arranged above the water vapor generating chamber, a water outlet pipe is arranged at the bottom of the water storage tank 14 and is communicated with the water vapor generating chamber, an ultrasonic oscillation sheet 11 is arranged at the bottom of the water vapor generating chamber, an ultrasonic generator 9 and a fan 12 are arranged below the water vapor generating chamber, the ultrasonic oscillation sheet 11 is connected with the ultrasonic generator 9, the fan 12 is communicated with the space above the liquid level of the water vapor generating chamber through an air outlet pipe, and an air filter sheet 13 is arranged at the air outlet of the fan 12, the water vapor generating chamber is connected with the reaction device through a water vapor delivery pipeline 16, and a water level detection element 8 is further arranged on the water vapor generating chamber, and the signal output end of the water level detection element 8 is connected with the control system.

[0025] An electric valve one 7 is arranged on the water vapor delivery pipeline 16, and the control end of the electric valve one 7 is connected with the control system, and a pipeline heat preservation layer 15 is arranged on the outer side of the water vapor delivery pipeline 16.

[0026] The top of the furnace pipe 5 is closed through an upper flange 1, the bottom of the furnace pipe 5 is closed through a lower flange 6, a furnace body heat preservation layer 18 is arranged on the outer side of the furnace body, a thermocouple 20 is arranged in the furnace pipe 5, the thermocouple 20 extends from the upper flange 1, an electric valve two is arranged on the gas outlet pipeline 2, and the signal output end of the thermocouple 20 and the control end of the electric valve two are connected with the control system respectively.

[0027] The electronic balance 21 is an electronic balance with recording function.

[0028] The gas supply source comprises an H2 gas source, a CO gas source, a CO2 gas source and a N2 gas source, and an electric valve three is arranged at the connection between the gas supply source and the gas supply pipeline 17; an electric valve four is arranged on the gas supply pipeline 17; and the control ends of the electric valve three and the electric valve four are connected to the control system.

[0029] The exhaust system comprises a gas cooling device and a gas component detector.

[0030] The detection method of the coke water vapor gasification reaction and performance detection device is as follows:

[0031] S1, crushing coke to prepare a coke sample 3 with a particle size of 0.1-0.3 mm, drying the coke sample 3 at a temperature of 105-110 DEG C for more than 2 hours, and then taking out and cooling to room temperature;

[0032] S2, connecting the water vapor generating device and the reaction device through a water vapor conveying pipeline 16, connecting the gas supply pipeline 17 with the gas supply system, and connecting the gas outlet pipeline 2 with the exhaust system;

[0033] S3, placing 200g±1g of the coke sample in the basket 19, connecting the basket 19 with the electronic balance 21, recording the mass of the basket 19 as 0, and recording the mass of the coke sample 3 in the basket 19 as m1;

[0034] S4, heating the furnace body to the experimental temperature according to the set heating program, at the same time, starting the water vapor generating device to generate water vapor, controlling the flow of the water vapor entering the furnace tube 5 and the flow of the supplied gas through the control system, performing the coke water vapor gasification reaction experiment, and monitoring the mass of the coke in real time during the experiment;

[0035] S5, after the experiment, recording the mass of the coke after absorbing alkali metals as m2;

[0036] S6, under a nitrogen atmosphere, heating at a heating rate of 5-20 DEG C / min to 200 DEG C, and then performing a constant temperature reaction or a variable temperature reaction, specifically as follows:

[0037] Constant temperature reaction: heating from 200 DEG C to T1 at a rate of 10-20 DEG C / min; T1 is 900 DEG C-1300 DEG C, the supplied gas is one or a mixture of two or more of CO2, CO, H2O, H2 and N2, the ratio of the supplied gas is adjusted according to the need, the reaction time is 0.5-2h, nitrogen is introduced after the constant temperature reaction, and the temperature is lowered to room temperature at a rate of 10-20 DEG C / min;

[0038] ​Temperature swing reaction: from 200℃ to T1, and then from T1 to T2 at a rate of 5-10℃ / min, T2 is 900-1300℃; nitrogen is introduced after reaching T2, and the temperature is decreased to room temperature at a rate of 10-20℃ / min;

[0039] S7, after the reaction is completed and the reaction device is cooled, the coke sample is taken out, the mass of the coke after the reaction is weighed and recorded as m3; the coke reactivity and the strength after the reaction are tested three times, and the arithmetic mean value of the parallel tests is taken as the test result.

[0040] In the step S5, the calculation of the alkali metal adsorption amount in the coke is carried out according to formula (1):

[0041]

[0042] In formula (1), m1 is the mass of the coke sample before the reaction, and the unit is g;

[0043] m2 is the mass of the coke after the alkali metal is adsorbed, and the unit is g.

[0044] In the step S7, the coke reactivity SCRI is calculated according to formula (2):

[0045]

[0046] In formula (2), m1 is the mass of the coke sample before the gasification reaction, and the unit is g;

[0047] m3 is the mass of the residual coke sample after the reaction, and the unit is g;

[0048] The strength of the coke after the reaction SCSR is calculated according to formula (3):

[0049]

[0050] In formula (3), m3 is the mass of the residual coke sample after the reaction, and the unit is g;

[0051] m4 is the mass of the coke with a particle size greater than 10mm after the drum, and the unit is g.

[0052] The utility model discloses a coke water vapor gasification reaction and performance detection device, including water vapor generating device, reaction device, gas supply system, control system, exhaust system and electronic balance etc. Water vapor generating device adopts the principle of ultrasonic oscillation and produces water vapor, reaction device is used for heating to realize gasification reaction to coke sample, control system is used for accurately controlling reaction temperature, and the switch action of electric valve on each pipeline is controlled, realizes the mixing and flow control of reaction gas, to simulate different blast furnace atmosphere.

[0053] The detection method of the coke water vapor gasification reaction and performance detection device comprises a preparation stage, a water vapor generation stage, a coke gasification reaction stage, a data acquisition and result evaluation stage and the like.

[0054] The water vapor generation device comprises an ultrasonic generator (connected with a power source), an ultrasonic oscillation sheet, a water vapor generation chamber (provided with a water level detection element), a water storage tank, a fan and other auxiliary components, and through the cooperative work of the parts, the efficient water vapor generation function is realized, and the water vapor flow demand under different experimental scenes can be met.

[0055] The heating element is preferably a U-shaped silicon molybdenum rod, and the temperature regulation range of the heating element is 0-1600 DEG C.

[0056] The reaction device is provided with a furnace tube, a hanging basket is arranged in the constant temperature area of the furnace tube, and the hanging basket is convenient for gas to pass through while containing the coke sample.

[0057] The gas supply system is used for realizing gas mixing and flow control, and the gases that can be used in the experiment include H2O, H2, CO, CO2 and N2, and the various gases are mixed according to the required proportion in the experiment through corresponding gas supply pipelines and the flow is controlled through corresponding electric valves.

[0058] The electronic balance is used as the coke quality detection equipment, the electronic balance with a recording function is preferably selected, the hanging basket containing the coke sample with a certain mass is hung below the electronic balance through a connecting piece (such as a sling), and the real-time monitoring of the mass change of the coke sample in the experiment is realized.

[0059] The thermocouple is used for temperature measurement of the reaction device, the thermocouple is inserted into the furnace tube (a corundum tube or a quartz tube) from the upper flange, and the temperature of the region where the coke sample is located is directly measured.

[0060] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and inventive concept of the present application, can make equivalent substitutions or changes within the technical range disclosed by the present application, which should be encompassed in the protection scope of the present application.

Claims

1. A coke water vapor gasification reaction and performance detection device, characterized in that, The device comprises a water vapor generating device, a reaction device, a gas supply system, an electronic balance, an exhaust system and a control system; the water vapor generating device is arranged below the reaction device, and is an ultrasonic oscillation water vapor generating device; the reaction device is composed of a furnace body, a furnace pipe and a heating element; the furnace pipe is arranged in the middle of the furnace body and has closed ends; the heating element is arranged in the furnace body outside the furnace pipe; a hanging basket for containing a coke sample is suspended in the furnace pipe through the electronic balance; the ultrasonic oscillation water vapor generating device is connected to the water vapor inlet at the bottom of the furnace pipe through a water vapor conveying pipeline; the gas supply system comprises a gas supply pipeline and a plurality of gas sources; the gas sources are connected to the gas inlets at the bottom of the furnace pipe through the gas supply pipeline; the gas outlet at the top of the furnace pipe is connected to the exhaust system through an exhaust pipeline; and the control end of the heating element and the signal output end of the electronic balance are connected to the control system.

2. The coke water vapor gasification reaction and performance detection device according to claim 1, characterized in that, The water vapor generating device is composed of a shell, an ultrasonic generator, an ultrasonic oscillation sheet, a water vapor generating chamber, a water storage tank and a fan arranged in the shell; the water storage tank is arranged above the water vapor generating chamber; the water outlet pipe at the bottom of the water storage tank is in communication with the water vapor generating chamber; the ultrasonic oscillation sheet is arranged at the bottom of the water vapor generating chamber; the ultrasonic generator and the fan are arranged below the water vapor generating chamber; the ultrasonic oscillation sheet is connected to the ultrasonic generator; the fan is connected to the space above the liquid surface of the water vapor generating chamber through an air outlet pipe; an air filter sheet is arranged at the air outlet of the fan; the water vapor generating chamber is connected to the reaction device through a water vapor conveying pipeline; the water vapor generating chamber is also provided with a water level detection element; and the signal output end of the water level detection element is connected to the control system.

3. The coke water vapor gasification reaction and performance detection device according to claim 1, characterized in that, An electric valve one is arranged on the water vapor conveying pipeline; and the control end of the electric valve one is connected to the control system.

4. The coke water vapor gasification reaction and performance detection device according to claim 1, characterized in that, The top of the furnace pipe is closed through an upper flange; the bottom of the furnace pipe is closed through a lower flange; a furnace body heat preservation layer is arranged outside the furnace body; a thermocouple is arranged in the furnace pipe; the thermocouple extends from the upper flange; an electric valve two is arranged on the exhaust pipeline; and the signal output end of the thermocouple and the control end of the electric valve two are connected to the control system.

5. The coke water vapor gasification reaction and performance detection device according to claim 1, characterized in that, The electronic balance is an electronic balance with recording function.

6. The coke water vapor gasification reaction and performance detection device according to claim 1, characterized in that, The gas sources comprise H2 gas source, CO gas source, CO2 gas source and N2 gas source; an electric valve three is arranged at the connection between the gas sources and the gas supply pipeline; an electric valve four is arranged on the gas supply pipeline; and the control ends of the electric valve three and the electric valve four are connected to the control system.

7. The coke water vapor gasification reaction and performance detection device according to claim 1, characterized in that, The exhaust system comprises a gas cooling device and a gas component detector.

Images