CN215065934U - Vacuum degassing system for volatile components in coal mixed pyrolysis raw materials - Google Patents
Vacuum degassing system for volatile components in coal mixed pyrolysis raw materials Download PDFInfo
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Abstract
The utility model relates to a vacuum degassing system of volatile matter in coal mixed pyrolysis raw materials, mixed pyrolysis reaction system and evacuation system provide different reaction environment for volatile matter extraction, thus make avoid high temperature one-step pyrolysis reaction to determine the gas loss that volatile matter causes, it is favorable to the coal sample of part height coal bed gas or the low order coal of high volatile matter content; the mixed raw material processing system is matched with the reaction step, so that the processes of weighing, recovering and crushing the mixed raw materials can be realized; the vacuumizing system ensures that the gas collected by the volatile component gas collection system has no air interference, so that the accuracy of the system is improved; the utility model discloses can be used for predicting and guiding the coal-fired mixed pyrolysis raw materials kind, ratio and mix the problem of burning, when optimizing the coal-fired mixed pyrolysis raw materials's constitution, also reduced the heat loss of burning the raw materials, reduce cost has reached economic environmental protection's mesh ground, mixes the pyrolysis to the coal and has important guide meaning.
Description
Technical Field
The utility model relates to a clean thermal utilization technical field of coal specifically is a vacuum degassing system of volatile matter in coal mixing pyrolysis raw materials.
Background
The problems of resource shortage, air pollution, greenhouse effect and the like are caused by excessive development of fossil resources, and the mixed pyrolysis technology of fossil fuels is one of effective ways for solving the problems. By utilizing the mixed pyrolysis and coupling technology of the coal and the low-quality fossil fuel, the grading conversion utilization of an energy structure system can be changed, and the comprehensive heat utilization of fossil energy is realized.
The hybrid pyrolysis process is a complex chemical reaction process, including the cleavage of oxygen-containing functional groups, the decomposition of aliphatic side chains, the condensation of aromatic structures, the cross-linking between structures, and the migration of catalytic media. Wherein, the desorption process of volatile components, the semicoke cracking process, the gas phase reaction process of the volatile components and the like are carried out simultaneously in a complex multiphase environment.
The volatile component is one of the important characteristics of the coal coalification degree of coal and is used as an important index for measuring the quality of the coal-fired raw material, and the higher the volatile component is, the better the combustion degree is. Generally refers to volatile components contained in geological sampling coal, such as water and carbon dioxide, and volatile substances such as sulfur, chlorine, fluorine and the like. Factors affecting the volatile components include heating time and heating temperature. In the conventional method for measuring the volatile components, a coal sample is heated for 7min (the temperature is about 900 ℃) in a vacuum environment, liquid and gas (mainly comprising mineral substances and organic matters) after pyrolysis are collected, and the content of the volatile components in the coal sample is obtained through calculation.
However, there are problems in that the composition of volatiles in the raw materials for mixed pyrolysis is different, so that the yield and composition of the gas phase of the mixed pyrolysis are changed, and the volatile analysis properties of different fuels are different. The traditional high-temperature one-step pyrolysis reaction is utilized to measure the mixed pyrolysis volatile components, so that the loss of the volatile components in different degrees can be caused, for example, part of coal samples with high coal bed gas content, low-rank coal with high volatile component content and the like cause the result to deviate from the real situation, and obviously, the method is not suitable for use.
SUMMERY OF THE UTILITY MODEL
To the one step pyrolysis reaction of utilization tradition high temperature that exists among the prior art comes the survey to mix the pyrolysis volatile component, can cause the loss problem of the different degree of volatile component, the utility model provides a vacuum degassing system of volatile component in the coal mixes pyrolysis raw materials.
The utility model discloses a realize through following technical scheme:
a vacuum degassing system for volatile components in coal mixed pyrolysis raw materials is characterized by comprising a mixed raw material processing system, a vacuumizing system, a mixed pyrolysis reaction system and a volatile gas collection and distribution system;
the mixed pyrolysis reaction system comprises a pyrolysis tank;
the mixed raw material processing system comprises a feed valve and a weighing instrument which are sequentially arranged on a conveying pipeline;
the feed port of the pyrolysis tank is connected with the discharge port of the weighing instrument, and the discharge port of the pyrolysis tank is connected with the feed port of the feed valve;
the vacuumizing system is respectively connected with the feed port of the feed valve and the pyrolysis tank in a sealing manner, and the air inlet of the volatile component gas collection system is connected with the volatile component outlet at the top of the pyrolysis tank.
Further, mix raw materials processing system still includes ball-milling appearance, hopper and the discharge valve of sealing connection in proper order, and the ball-milling appearance is connected to the discharge gate of feed valve, and the discharge valve sealing connection weighs the feed inlet of appearance.
Further, the vacuum pumping system comprises a vacuum pump, and the vacuum pump is connected with the pyrolysis tank through a vacuum valve of the pyrolysis tank; the vacuum pump is connected with the feed inlet of the feed valve through a vacuum valve of the raw material processing system and is used for vacuumizing the mixed raw material processing system.
Furthermore, the volatilization gas distribution and collection system comprises a gas collection bottle connected with a volatilization outlet of the pyrolysis tank through a gas collection pipeline, and a flowmeter is arranged on the gas collection pipeline.
Furthermore, the volatile component gas collection system also comprises a condenser connected in parallel on the gas collection pipeline; the air inlet of the condenser is connected to the air collecting pipeline behind the flowmeter, and the air outlet is connected to the air inlet of the air collecting bottle.
Further, a condenser inlet valve is arranged at the air inlet of the condenser, and a condenser outlet valve is arranged at the air outlet of the condenser.
Further, the gas outlet of the gas collecting bottle is connected with an analysis unit for analyzing volatile components.
Further, the air inlet of the analysis unit is provided with a sample sending analysis valve.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model relates to a vacuum degassing system of volatile matter in coal mixed pyrolysis raw materials, mixed pyrolysis reaction system and evacuation system provide different reaction environment for volatile matter extraction, thus make avoid high temperature one-step pyrolysis reaction to determine the gas loss that volatile matter causes, it is favorable to the coal sample of part height coal bed gas or the low order coal of high volatile matter content; the mixed raw material processing system is matched with the reaction step, so that the processes of weighing, recovering and crushing the mixed raw materials can be realized; the vacuumizing system ensures that the gas collected by the volatile component gas collection system has no air interference, so that the accuracy of the system is improved; the utility model discloses can be used for predicting and guiding the coal-fired mixed pyrolysis raw materials kind, ratio and mix the problem of burning, when optimizing the coal-fired mixed pyrolysis raw materials's constitution, also reduced the heat loss of burning the raw materials, reduce cost has reached economic environmental protection's mesh ground, mixes the pyrolysis to the coal and has important guide meaning.
Furthermore, the gas generating and distributing system comprises a flowmeter for monitoring the collected volatile components, and meanwhile, the condition of the collection degree of the volatile components in the mixed raw materials can be judged according to the size of the air flowing through the gas generating and distributing system.
Drawings
FIG. 1 is a schematic view of a vacuum degassing system for volatile components in a coal-mixed pyrolysis feedstock according to the present invention;
FIG. 2 is a schematic view of a pre-pulverization vacuum degassing system for volatiles in a coal-blending pyrolysis raw material according to the present invention;
FIG. 3 is a schematic view of a low temperature heating vacuum degassing system for coal mixed pyrolysis raw material before pulverization according to the present invention;
fig. 4 is a schematic diagram of a system for low-temperature vacuum degassing after pulverization and high-temperature vacuum degassing after pulverization of volatile components in a coal-mixed pyrolysis raw material of the utility model.
In the figure: the device comprises a mixed raw material 1, a feeding valve 2, a ball mill 3, a hopper 4, a discharge valve 5, a weighing instrument 6, a heating device 7, a pyrolysis tank vacuum valve 8, a raw material processing system vacuum valve 9, a vacuum pump 10, a pyrolysis tank 11, a sampling valve 12, a flowmeter 13, a condenser inlet valve 14, a gas collecting bottle inlet valve 15, a condenser 16, a condenser outlet valve 17, a gas collecting bottle 18, a sample sending analysis valve 19, an analysis unit 20, a mixed raw material processing system 21, a vacuumizing system 22, a mixed pyrolysis reaction system 23 and a volatile component gas collecting system 24.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The utility model relates to a vacuum degassing system for volatile components in coal mixed pyrolysis raw materials, as shown in figure 1, comprising a mixed raw material processing system 21, a vacuum pumping system 22, a mixed pyrolysis reaction system 23 and a volatile component gas collection system 24;
the mixed pyrolysis reaction system 23 comprises a pyrolysis tank 11, and specifically, a heating device 7 for providing a heat source for the pyrolysis tank 11; the mixed raw material processing system 21 comprises a feed valve 2 and a weighing instrument 6 which are sequentially arranged on a material conveying pipeline;
wherein, the discharge gate of weighing apparatus 6 is connected to pyrolysis tank 11's feed inlet, as shown in fig. 2, be convenient for this system collect before not smashing the collection of volatile matter in the mixed raw materials 1, and simultaneously, feed inlet of feed valve 2 on the conveying pipeline is connected to pyrolysis tank 11's discharge gate, form and to supply not smashing mixed raw materials 1 to get into mixed raw materials processing system 21 from pyrolysis tank 11 and carry out kibbling return circuit, can realize collecting to the volatile matter before mixed raw materials 1 smashes, and is concrete, in order to guarantee the accuracy that volatile matter gathered, the aforesaid is sealing connection.
The utility model provides a preferred embodiment, the mixed raw material processing system 21 comprises a ball mill 3, a hopper 4 and a discharge valve 5 which are hermetically connected in sequence, a discharge port of a feed valve 2 on a material conveying pipeline is connected with the ball mill 3, and the discharge valve 5 is connected with a feed port of a weighing instrument 6; specifically, the mixed raw material 1 enters a ball mill 3 through a conveying pipeline and is crushed to a proper particle size, the crushed mixed raw material is stored in a hopper 4, a weighing instrument 6 measures weighing feedback records, the feeding of a discharge valve 5 is adjusted according to quality feedback, and finally, the mixed raw material 1 enters a pyrolysis tank 11; specifically, the port of the vacuum pump 10 of the vacuum pumping system 22 is provided with the vacuum valve 9 of the raw material processing system and is connected with the feed valve 2 on the material conveying pipeline, so that the mixed raw material processing system 21 can be vacuumized, and the situation that air enters the volatilization air distribution system 24 in the crushing process of the mixed raw material 1 to influence the accuracy of the measured volatile data is avoided.
The utility model provides a preferred embodiment, the vacuum pumping system 22 comprises a vacuum pump 10, the vacuum pump 10 is connected with the gas outlet of the pyrolysis tank 11 through a vacuum valve 8 of the pyrolysis tank for pumping vacuum inside the pyrolysis tank 11; the vacuum pump 10 is connected to the feed valve 2 through the raw material processing system vacuum valve 9 for evacuating the mixed raw material processing system 21.
The utility model provides a preferred embodiment, volatile component gas collecting system 24 includes gas collecting bottle 18, and gas collecting bottle 18 passes through flowmeter 13 on the gas collecting pipeline and connects the volatile component export of pyrolysis jar 11, and specifically, flowmeter 13 is used for monitoring the volatile component gas total amount that passes through the gas collecting pipeline, and the researcher can monitor the mixed raw materials 1 pyrolysis process reaction according to volatile component gas flow, and gas collecting bottle 18 air inlet is provided with gas collecting bottle inlet valve 15; meanwhile, a condenser 16 is connected in parallel to the gas collecting pipeline behind the flow meter 13 to cool the pumped volatile gas, and a gas outlet of the condenser 16 is connected with a gas inlet of a gas collecting bottle 18 and then discharged into the gas collecting bottle 18 for analysis; specifically, the air inlet of the condenser 16 is provided with a condenser inlet valve 14, and the air outlet is provided with a condenser outlet valve 17, because in the use process of the system, the volatile gas generated in part of the steps contained in the system can enter the gas collecting bottle 18 for storage without cooling.
The utility model provides a preferred embodiment, the analysis unit 20 that is used for the analysis volatile is connected to the gas outlet of gas collecting bottle 18, and the air inlet of analysis unit 20 is provided with and send a kind analysis valve 19 for detection and analysis to the volatile.
The utility model relates to a vacuum degassing system of volatile matter in coal mixing pyrolysis raw materials when using, including following step:
step one, as shown in fig. 2, the process of a vacuum degassing system before crushing of volatile components in the mixed raw material 1; specifically, the mixed raw material 1 is weighed by a weighing instrument 6 and then placed in a closed pyrolysis tank 11, and a sampling valve 12 of a volatile component outlet of the pyrolysis tank 11 is closed; starting a vacuum pump 10 to enable a pyrolysis tank 11 to be in a vacuum state until a vacuum pressure gauge is a negative value; opening the gas collection bottle inlet valve 15 to ensure that gas enters the gas collection bottle 18; slowly opening the sampling valve 12 to enable the gas in the pyrolysis tank 11 to automatically enter a gas collecting bottle 18 of a subsequent sampling device until a vacuum pressure gauge of the vacuum pump 10 returns to normal, repeating the step for multiple times according to specific conditions, wherein the interval is about 15-20 min each time until the flow meter 13 displays that the amount of the extracted gas is less than 10ml, and finishing gas extraction; the gas collected by the gas collecting bottle 18 is sent to an analysis unit 20 through a sample sending analysis valve 19, and is further processed and analyzed to obtain the components and the content of volatile components separated out from the mixed pyrolysis raw material at room temperature.
Step two, as shown in fig. 3, a process of low-temperature heating the vacuum degassing system before crushing of the volatile components in the mixed raw material 1; specifically, after the above steps are finished, the heating device 7 is started, the temperature is controlled to be about 100 ℃, and the mixed raw material 1 from which the volatile gas is removed at room temperature is separated out from the auxiliary pyrolysis tank 11 at a lower heating temperature; opening a condenser inlet valve 14 and a condenser outlet valve 17 to ensure that the gas enters a gas collecting bottle 18; slowly opening the sampling valve 12 to enable the gas in the pyrolysis tank 11 to automatically enter a subsequent sampling device, specifically, enabling the volatile gas to enter a gas collecting bottle 18 through a condenser 16 until a vacuum pressure gauge of the vacuum pump 10 returns to normal, repeating the step for multiple times according to specific conditions, wherein the interval is about 15-20 min each time until the flow meter 13 displays that the amount of the gas to be pumped is less than 10ml, and finishing pumping; the gas collected by the gas collecting bottle 18 is sent to an analysis unit 20 through a sample sending analysis valve 19, and is further processed and analyzed to obtain the components and the content of volatile matters separated out from the mixed pyrolysis raw material before crushing under the low-temperature heating state at 100 ℃.
Step three, as shown in fig. 4, the process of the low-temperature vacuum degassing system after the pulverization of the volatile components in the mixed raw materials; specifically, after the second step is finished, the mixed raw material 1 in the pyrolysis tank 11 from which volatile gas is removed by low-temperature heating is directly discharged into the feed valve 2, the process is a sealing operation, specifically, the mixed raw material 1 is crushed into a suitable particle size, such as a particle size of about 200 meshes, by the feed valve 2 through the ball mill 3, and enters the weighing instrument 6 from the hopper 4 through the discharge valve 5 to be weighed, and then is sent into the closed pyrolysis tank 11; the crushing system is carried out under the vacuum sealing condition and is controlled by a vacuum pump 10 and a vacuum valve 9 of a raw material processing system, so that the loss of volatile components of the raw materials in the crushing process can be avoided; closing a sampling valve 12 at the outlet of the pyrolysis tank 11, and starting a vacuum pump 10 to enable the pyrolysis tank 11 to be in a vacuum state; and starting the heating device 7, controlling the temperature to be about 100 ℃, and separating out volatile matters from the mixed coal sample in the auxiliary pyrolysis tank 11 at a lower temperature. Opening a condenser inlet valve 14 and a condenser outlet valve 17 to ensure that the gas enters a gas collecting bottle 18; and slowly opening the sampling valve 12 to enable the gas in the pyrolysis tank 11 to automatically enter a subsequent sampling device, and enter the gas collection bottle 18 through the condenser 16 until the vacuum pressure gauge of the vacuum pump 10 returns to normal, wherein the gas collected by the gas collection bottle 18 is sent to the analysis unit 20 through the sample sending analysis valve 19, and is further processed and analyzed to obtain the components and the content of the volatile matters separated out from the mixed pyrolysis raw material after being crushed under the low-temperature heating state at 100 ℃.
Step four, as shown in fig. 4, the process of the high-temperature vacuum degassing system after the pulverization of the volatile components in the mixed raw materials; consistent with the third step, it should be noted that the temperature of the heating device 7 is controlled to be about 900 ℃, and the volatile component is separated out at a higher temperature from the mixed raw material 1 which is crushed in the auxiliary pyrolysis tank 11 and is separated out at a low temperature, so as to obtain the components and the content of the volatile component separated out from the mixed pyrolysis raw material after being crushed at a high temperature of 900 ℃.
And step five, calculating and analyzing the volatile components and the content separated out in the four vacuum degassing steps to obtain the total amount and the composition structure of the volatile components in the coal mixed pyrolysis raw material.
Specifically, the steps one to four can be independently repeated for a plurality of times according to specific conditions, the interval is about 15min to 20min each time, until the flow meter 13 displays that the gas amount pumped is less than 10ml, the pumping is finished, and the next step is executed.
The utility model relates to a vacuum degassing system of volatile component in coal mixed pyrolysis raw materials when using, collects mixed raw materials volatile component material at room temperature and low temperature respectively, later smashes mixed raw materials to add low-temperature heating and high-temperature heating respectively, carry out the collection of volatile component to the mixed raw materials under the different states respectively promptly, measure after gathering, make the data of gathering more accurate and complete.
Claims (8)
1. A vacuum degassing system for volatile components in coal mixed pyrolysis raw materials is characterized by comprising a mixed raw material processing system (21), a vacuumizing system (22), a mixed pyrolysis reaction system (23) and a volatile component gas distribution system (24);
the hybrid pyrolysis reaction system (23) comprises a pyrolysis tank (11);
the mixed raw material processing system (21) comprises a feed valve (2) and a weighing instrument (6) which are sequentially arranged on a material conveying pipeline;
the feed inlet of the pyrolysis tank (11) is connected with the discharge outlet of the weighing instrument (6), and the discharge outlet of the pyrolysis tank (11) is connected with the feed inlet of the feed valve (2);
the vacuumizing system (22) is respectively connected with a feed port of the feed valve (2) and the pyrolysis tank (11) in a sealing manner, and an air inlet of the volatile component gas collection system (24) is connected with a volatile component outlet at the top of the pyrolysis tank (11).
2. The vacuum degassing system for the volatile components in the coal mixed pyrolysis raw material according to claim 1, wherein the mixed raw material processing system (21) further comprises a ball mill (3), a hopper (4) and a discharge valve (5) which are hermetically connected in sequence, a discharge port of the feed valve (2) is connected with the ball mill (3), and the discharge valve (5) is hermetically connected with a feed port of the weighing instrument (6).
3. The vacuum degassing system for volatile components in coal mixed pyrolysis feedstock according to claim 1, wherein the vacuum pumping system (22) comprises a vacuum pump (10), the vacuum pump (10) is connected to the pyrolysis tank (11) through a pyrolysis tank vacuum valve (8); the vacuum pump (10) is connected with the feed inlet of the feed valve (2) through a vacuum valve (9) of the raw material processing system and is used for vacuumizing the mixed raw material processing system (21).
4. The vacuum degassing system for the volatile components in the coal mixed pyrolysis raw material according to claim 1, characterized in that the volatile component gas collection system (24) comprises a gas collection bottle (18) connected with a volatile component outlet of the pyrolysis tank (11) through a gas collection pipeline, and a flow meter (13) is arranged on the gas collection pipeline.
5. The vacuum degassing system for the coal mixed pyrolysis feedstock as recited in claim 4, wherein the volatile matter gas collection system (24) further comprises a condenser (16) connected in parallel to the gas collection pipeline; the air inlet of the condenser (16) is connected to the air collecting pipeline behind the flowmeter (13), and the air outlet is connected with the air inlet of the air collecting bottle (18).
6. The vacuum degassing system for coal mixed pyrolysis feedstock according to claim 5, wherein the air inlet of the condenser (16) is provided with a condenser inlet valve (14), and the air outlet is provided with a condenser outlet valve (17).
7. The vacuum degassing system for coal mixed pyrolysis feedstock as recited in claim 4, characterized in that the gas outlet of the gas collecting bottle (18) is connected with an analysis unit (20) for analyzing volatile components.
8. The vacuum degassing system for coal-mixed pyrolysis feedstock according to claim 7, wherein the gas inlet of the analysis unit (20) is provided with a sample-feeding analysis valve (19).
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| CN202121305177.4U CN215065934U (en) | 2021-06-10 | 2021-06-10 | Vacuum degassing system for volatile components in coal mixed pyrolysis raw materials |
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