CN210514147U - Coal pile spontaneous combustion tendency measuring system - Google Patents
Coal pile spontaneous combustion tendency measuring system Download PDFInfo
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- CN210514147U CN210514147U CN201920706279.3U CN201920706279U CN210514147U CN 210514147 U CN210514147 U CN 210514147U CN 201920706279 U CN201920706279 U CN 201920706279U CN 210514147 U CN210514147 U CN 210514147U
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Abstract
The utility model relates to a coal pile spontaneous combustion tendency survey system, especially can be comparatively real simulation coal yard pile spontaneous combustion tendency characteristic under mode, granularity, the air mass flow of piling up, be applicable to the survey of coal pile spontaneous combustion tendency characteristic. The main machine of the utility model comprises an inner cylinder upper cover, an inner cylinder heater, an air preheating conduit, a water tank, an inner cylinder thermometer, an inner cylinder, a reactor thermometer, an inner cylinder stirrer and a water pump; the inner cylinder heater, the air preheating conduit, the reactor thermometer and the inner cylinder stirrer are all arranged in the inner cylinder, the inner cylinder thermometer is arranged on an upper cover of the inner cylinder, the upper cover of the inner cylinder is arranged on the inner cylinder, the air preheating conduit is connected with the reactor, the water suction pump is connected with the inner cylinder, and the water suction pump is arranged in the water tank. The system is suitable for simulating the spontaneous combustion tendency characteristics of the coal pile under the conditions of coal yard accumulation mode, granularity and air flow rate, and has reasonable and compact structure and accurate and reliable test result.
Description
Technical Field
The utility model relates to a coal pile spontaneous combustion tendency survey system, especially can be comparatively real simulation coal yard pile spontaneous combustion tendency characteristic under mode, granularity, the air mass flow of piling up, be applicable to the survey of coal pile spontaneous combustion tendency characteristic.
Background
Coal spontaneous combustion is a common disaster in coal mining, transporting and storing processes, not only causes great waste of resources, but also seriously threatens lives and properties of people. Coal is used as 'grain' of thermal power generation enterprises, is the largest cost, accounts for about 70% of the total power generation cost, and directly influences the economic benefit level and competitiveness of the enterprises.
For thermal power generation enterprises, proper storage of a certain amount of coal is needed for safe operation of a unit, the phenomenon of oxidative spontaneous combustion of the coal in the storage process is difficult to prevent, the conventional coal industry standard adopts a chromatographic dynamic oxygen uptake method to determine the spontaneous combustion tendency of the coal, but the method only considers the physical oxygen uptake of a coal sample at 30 ℃ to judge the strength of the spontaneous combustion tendency of the coal, is an indirect test method and has a complex test process; the coal spontaneous combustibility tester also aims at the coal powder to carry out tests in technical condition requirements, and the experimental conditions are different from the actual stacking conditions of a coal yard in reality, so that the coal yard is difficult to effectively guide storage, blending and the like.
Aiming at the fact that no instrument for comprehensively and accurately measuring the spontaneous combustion tendency characteristic of the coal pile exists at present, on the basis that a team has implemented a measurement method for accurately measuring and judging the spontaneous combustion tendency of the coal pile in an electric power industry standard DL/T1712 plus 2017 'spontaneous combustion tendency characteristic measurement method of coal in a thermal power plant', the utility model discloses a set of formed, perfect and easily-popularized measurement equipment is designed and developed, the spontaneous combustion tendency characteristic of the coal pile is accurately measured, and important technical guidance is provided for the prevention and treatment work of the disaster. For example, chinese patent publication No. CN101206211A, publication No. 2015, 05 and 27, publication No. CN204359758U, discloses a measuring device simulating coal spontaneous combustion tendency in a coal yard, and chinese patent publication No. CN 272013896, publication No. 2009, 07 and 15, publication No. CN 272013896, disclose a measuring device simulating coal spontaneous combustion tendency in a coal yard, which all have the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design reasonable, can simulate coal yard true pile up coal pile spontaneous combustion oxidation process under mode, granularity, the air mass flow, test coal pile spontaneous combustion tendency characteristic, coal pile spontaneous combustion tendency survey system.
The utility model provides a technical scheme that above-mentioned problem adopted is: the coal pile spontaneous combustion tendency measuring system comprises a host, a reactor, an SD controller and a computer, wherein the reactor is installed in the host, the reactor is connected with the SD controller, the SD controller is connected with the computer, and the coal pile spontaneous combustion tendency measuring system is characterized in that: the host comprises an inner cylinder upper cover, an inner cylinder heater, an air preheating conduit, a water tank, an inner cylinder thermometer, an inner cylinder, a reactor thermometer, an inner cylinder stirrer and a water pump; inner tube heater, air preheat pipe, reactor thermometer and inner tube agitator and all install in the inner tube, the inner tube thermometer is installed and is covered on the inner tube, the inner tube upper cover is installed on the inner tube, the air preheats the pipe and is connected with the reactor, the suction pump is connected with the inner tube, and the suction pump is installed in the water tank. The system is suitable for simulating the spontaneous combustion tendency characteristics of the coal pile under the conditions of coal yard accumulation mode, granularity and air flow rate, and has reasonable and compact structure and accurate and reliable test result.
Further, the reactor comprises a gas outlet connecting pipe, an outlet porous partition plate, a sample containing tank body, a temperature measuring hole, an inlet porous partition plate, a bottom cover clamp, a gas inlet connecting pipe, a bottom cover, a top cover and a top cover clamp; the top cover is arranged at the upper end of the sample containing tank body through the top cover clamp, the bottom cover is arranged at the lower end of the sample containing tank body through the bottom cover clamp, the gas outlet connecting pipe is arranged on the top cover, the gas inlet connecting pipe is arranged on the bottom cover, the outlet porous partition plate and the inlet porous partition plate are arranged in the sample containing tank body, the outlet porous partition plate is located below the gas outlet connecting pipe, the inlet porous partition plate is located above the gas inlet connecting pipe, the temperature measuring hole is formed in the sample containing tank body, and the air preheating conduit is connected with the gas inlet connecting pipe.
Further, the reactor thermometer passes through the temperature measuring hole, and the measuring head is positioned in the reactor; and/or; the inner cylinder heater is connected with the air preheating conduit.
Furthermore, the SD controller comprises a data acquisition device and a temperature tracking heating device, wherein the data acquisition device is used for acquiring temperature rise data of the coal sample in the reactor, the temperature tracking heating device controls the inner cylinder heater to automatically heat water according to the temperature rise of the coal sample, the temperature of the water is ensured to be consistent with the temperature of the coal sample, and the heat insulation heating of the coal sample is ensured; the SD controller is connected with a computer through an SD measurement and control interface, and the computer is connected with the electronic balance, the display and the printer. The data acquisition device acquires the central temperature of the reactor and the temperature of the inner barrel water in real time through the temperature sensor and feeds temperature parameters back to the control system; after the temperature tracking and heating device in the control system receives the temperature signal of the temperature sensor, the inner cylinder heater is controlled to track the temperature change of the coal sample, the temperature of the water is ensured to be consistent with the temperature of the coal sample reactor, and the adiabatic temperature rise of the coal sample is ensured.
Furthermore, superfine glass fiber heat-insulating cotton is arranged outside the inner cylinder and the water tank to keep the temperature of water in the inner cylinder and the water tank constant, and the control precision is high.
Furthermore, the inner cylinder heater is a variable frequency heater to ensure uniform heating of water supply, and has high control precision and good stability.
Further, the reactor is made of a cylindrical polished stainless steel material. Put and be equipped with ventilative even import porous baffle, during gaseous even baffle that passes through the below evenly gets into the coal sample, the top cap is fixed with flourishing appearance jar body with the top cap clamp is sealed.
Furthermore, the air preheating conduit is a large-diameter red copper round pipe and is uniformly arranged on the inner wall of the inner barrel, and the water bath plays a role in heating gas so as to ensure that the temperature of the coal sample entering the air preheating conduit is consistent with the temperature of the coal sample.
Further, another technical object of the present invention is to provide a method for measuring a coal pile spontaneous combustion tendency measurement system.
The above technical object of the present invention can be achieved by the following technical solutions.
A measuring method of a coal pile spontaneous combustion tendency measuring system is characterized in that: the measurement method comprises the following steps:
before measurement, removing oxidized surfaces of collected coal samples, crushing the coal samples to the nominal maximum granularity of 6 mm to obtain experimental coal samples, uniformly putting the prepared coal samples with the nominal maximum granularity of 6 mm into a reactor, putting the reactor into an inner cylinder to be fixed, and sequentially connecting a gas outlet connecting pipe, a gas inlet connecting pipe, an inner cylinder thermometer and a reactor thermometer;
(II) when the measurement is started, the constant-temperature 69 ℃ water in the water tank enters the inner cylinder, the water passes through the reactor, the coal sample is indirectly heated, the coal sample in the reactor is heated, a water bath effect is achieved, when the central temperature of the coal sample rises to 69 ℃, the control program reminds that the experimental temperature is reached, the temperature is constant at 69 ℃ for 30 min, then the control program controls the air valve to be opened, the control air is introduced into the reactor at the flow rate of 50mL/min, the introduced air is heated to be consistent with the temperature of the coal sample through the air preheating conduit arranged in the inner cylinder, the data acquisition device acquires the central temperature and the water temperature of the reactor according to a certain frequency, when the coal sample starts to be oxidized and heated, the temperature tracking and heating device controls the inner cylinder heater, the water is automatically heated according to the rise of the temperature of the coal sample, the temperature of the air sent into the reactor is ensured to be consistent, finishing detection until the temperature of the coal sample rises to 71 ℃;
and (III) after the determination is finished, the SD controller controls the gas switch to be closed, water in the inner cylinder is pumped back into the water tank, the power supply of the heater of the inner cylinder is closed, the reactor is taken out, the coal sample is poured out and cleaned for next use, and the computer calculates the temperature rise rate of the coal sample according to the detection data by the computer software, so that the spontaneous combustion tendency characteristic of the coal is judged.
Furthermore, the computer displays, records, saves and calculates the temperature change of the coal sample, the gas flow and the water temperature parameter in the inner cylinder in real time through a control program.
Compared with the prior art, the utility model has the advantages of it is following: the coal pile spontaneous combustion tendency measuring system can measure the coal pile spontaneous combustion tendency characteristics by relatively real reaction coal pile accumulation mode, granularity and air flow rate and comprehensively considering the internal and external influence factors in the coal pile spontaneous combustion process. The device has the advantages of compact structure, reasonable design, simple method, convenient operation and use and accurate and reliable test result.
Drawings
FIG. 1 is a schematic structural diagram of a system for measuring spontaneous combustion tendency of a coal pile according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a reactor structure according to an embodiment of the present invention.
Fig. 3 is a schematic sectional structure diagram of a reactor according to an embodiment of the present invention.
Fig. 4 is a schematic control diagram of a coal pile spontaneous combustion tendency measurement system according to an embodiment of the present invention.
In the figure: the device comprises a host 1, a reactor 2, an SD controller 3, a computer 4, an inner cylinder upper cover 11, an inner cylinder heater 12, an air preheating conduit 13, a water tank 14, an inner cylinder thermometer 15, an inner cylinder 16, a reactor thermometer 17, an inner cylinder stirrer 18, a water suction pump 19, a gas outlet connecting pipe 21, an outlet porous partition plate 22, a sample containing tank body 23, a temperature measuring hole 24, an inlet porous partition plate 25, a bottom cover clamp 26, a gas inlet connecting pipe 27, a bottom cover 28, a top cover 29 and a top cover clamp 210.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1 to 4, it should be understood that the structures, ratios, sizes, etc. shown in the drawings attached to the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essence, and any modification of the structures, changes of the ratio relationship, or adjustment of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, in the present specification, if the terms such as "upper", "lower", "left", "right", "middle" and "one" are used, they are not intended to limit the scope of the present invention, but to limit the relative relationship between the terms and the terms, and the scope of the present invention is not to be considered as the scope of the present invention.
The coal pile spontaneous combustion tendency determination system in the embodiment comprises a host 1, a reactor 2, an SD controller 3 and a computer 4, wherein the reactor 2 is installed in the host 1, the reactor 2 is connected with the SD controller 3, the SD controller 3 is connected with the computer 4, and the host 1 comprises an inner cylinder upper cover 11, an inner cylinder heater 12, an air preheating conduit 13, a water tank 14, an inner cylinder thermometer 15, an inner cylinder 16, a reactor thermometer 17, an inner cylinder stirrer 18 and a water suction pump 19; the inner cylinder heater 12, the air preheating conduit 13, the reactor 2, the reactor thermometer 17 and the inner cylinder stirrer 18 are all arranged in the inner cylinder 16, the inner cylinder thermometer 15 is arranged on the inner cylinder upper cover 11, the inner cylinder upper cover 11 is arranged on the inner cylinder 16, the air preheating conduit 13 is connected with the reactor 2, the water suction pump 19 is connected with the inner cylinder 16, and the water suction pump 19 is arranged in the water tank 14.
The reactor 2 in the embodiment comprises a gas outlet connecting pipe 21, an outlet porous partition 22, a sample holding tank body 23, a temperature measuring hole 24, an inlet porous partition 25, a bottom cover clamp 26, a gas inlet connecting pipe 27, a bottom cover 28, a top cover 29 and a top cover clamp 210; the top cover 29 is arranged at the upper end of the sample containing tank body 23 through a top cover hoop 210, the bottom cover 28 is arranged at the lower end of the sample containing tank body 23 through a bottom cover hoop 26, the gas outlet connecting pipe 21 is arranged on the top cover 29, the gas inlet connecting pipe 27 is arranged on the bottom cover 28, the outlet porous partition plate 22 and the inlet porous partition plate 25 are both arranged in the sample containing tank body 23, the outlet porous partition plate 22 is positioned below the gas outlet connecting pipe 21, the inlet porous partition plate 25 is positioned above the gas inlet connecting pipe 27, the temperature measuring hole 24 is arranged on the sample containing tank body 23, and the air preheating guide pipe 13 is connected with the gas inlet connecting.
Preferably, the reactor thermometer 17 passes through the temperature measuring hole 24, and the measuring head is positioned in the reactor 2; the inner tub heater 12 is connected to an air preheating duct 13,
preferably, the SD controller 3 includes a data acquisition device and a temperature tracking heating device, wherein the data acquisition device is used to acquire temperature rise data of the coal sample in the reactor 2, the temperature tracking heating device controls the inner tube heater 12 to automatically heat water according to the temperature rise of the coal sample, so as to ensure that the water temperature is consistent with the temperature of the coal sample and ensure the adiabatic temperature rise of the coal sample; the SD controller 3 is connected with the computer 4 through an SD measurement and control interface, and the computer 4 is connected with the electronic balance, the display and the printer. The data acquisition device acquires the central temperature of the reactor 2 and the temperature of the inner barrel 16 water in real time through a temperature sensor and feeds temperature parameters back to the control system; after the temperature tracking and heating device in the control system receives the temperature signal of the temperature sensor, the inner cylinder heater 12 is controlled to track the temperature change of the coal sample, the temperature of the water is ensured to be consistent with the temperature of the coal sample reactor, and the adiabatic temperature rise of the coal sample is ensured.
Preferably, the SD controller 3 includes an air inlet and outlet control module, a temperature control module, a stirring control module, and a water pump control module.
Preferably, the superfine glass fiber heat insulation cotton is arranged outside the inner cylinder 16 and the water tank 14 to keep the water temperature in the inner cylinder 16 and the water tank 14 constant, and the control precision is high.
Preferably, the inner cylinder heater 12 is a variable frequency heater to ensure uniform heating of the feed water, and has high control precision and good stability.
Preferably, the reactor 2 is made of a cylindrical polished stainless steel material. An inlet porous partition plate 25 with even ventilation is arranged in the lower position, gas uniformly enters the coal sample through the uniform partition plate below, and the top cover 29 and the sample containing tank body 23 are sealed and fixed through a top cover hoop 210.
Preferably, the air preheating conduit 13 is a large-diameter red copper round pipe uniformly arranged on the inner wall of the inner barrel 16, and the water bath serves to heat the gas to ensure that the temperature entering the coal sample is consistent with the temperature of the coal sample.
The measurement method of the coal pile spontaneous combustion tendency measurement system in this embodiment is as follows:
before measurement, removing oxidized surfaces of collected coal samples, crushing the coal samples to the nominal maximum granularity of 6 mm to obtain experimental coal samples, uniformly putting the prepared coal samples with the nominal maximum granularity of 6 mm into a reactor 2, putting the reactor 2 into an inner cylinder 16 to be fixed, and sequentially connecting a gas outlet connecting pipe 21, a gas inlet connecting pipe 27, an inner cylinder thermometer 15 and a reactor thermometer 17;
(II) when the measurement is started, the constant-temperature 69 ℃ water in the water tank 14 enters the inner cylinder 16, the water passes through the reactor 2, the coal sample in the reactor 2 is heated, the water bath effect is achieved, when the central temperature of the coal sample is raised to 69 ℃, the control program reminds that the experimental temperature is reached, the temperature is kept constant at 69 ℃ for 30 min, then the control program controls the air valve to be opened, the control air is introduced into the reactor 2 at the flow rate of 50mL/min, the introduced air is heated to be consistent with the temperature of the coal sample through the air preheating conduit 13 arranged in the inner cylinder 16, the data acquisition device acquires the central temperature and the water temperature of the reactor 2 according to a certain frequency, when the coal sample starts to be oxidized and heated, the temperature tracking and heating device controls the inner cylinder heater 12, the water is automatically heated according to the temperature rise of the coal sample, and the temperature of the air fed into the reactor 2 is ensured to be consistent, ensuring the adiabatic temperature rise of the coal sample until the detection is finished when the temperature of the coal sample rises to 71 ℃;
and (III) after the determination is finished, the SD controller 3 controls the gas switch to be closed, water in the inner cylinder 16 is pumped back into the water tank 14, the power supply of the inner cylinder heater 12 is closed, the reactor 2 is taken out, the coal sample is poured out and cleaned for next use, and the computer 4 calculates the temperature rise rate of the coal sample according to the detection data and judges the spontaneous combustion tendency characteristic of the coal.
Preferably, the computer 4 displays, records, saves, and calculates the temperature change of the coal sample, the gas flow rate, and the water temperature parameter in the inner tube 16 in real time by the control program.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. A coal pile spontaneous combustion tendency measuring system comprises a host (1), a reactor (2), an SD controller (3) and a computer (4), wherein the reactor (2) is installed in the host (1), the reactor (2) is connected with the SD controller (3), the SD controller (3) is connected with the computer (4), and the system is characterized in that: the main machine (1) comprises an inner cylinder upper cover (11), an inner cylinder heater (12), an air preheating conduit (13), a water tank (14), an inner cylinder thermometer (15), an inner cylinder (16), a reactor thermometer (17), an inner cylinder stirrer (18) and a water suction pump (19); inner tube heater (12), air preheat pipe (13), reactor (2), reactor thermometer (17) and inner tube agitator (18) and all install in inner tube (16), inner tube thermometer (15) are installed on inner tube upper cover (11), inner tube upper cover (11) are installed on inner tube (16), air preheat pipe (13) and reactor (2) and are connected, suction pump (19) are connected with inner tube (16), and suction pump (19) are installed in water tank (14).
2. The system for determining the spontaneous combustion tendency of a coal pile according to claim 1, wherein: the reactor (2) comprises a gas outlet connecting pipe (21), an outlet porous partition plate (22), a sample containing tank body (23), a temperature measuring hole (24), an inlet porous partition plate (25), a bottom cover clamp (26), a gas inlet connecting pipe (27), a bottom cover (28), a top cover (29) and a top cover clamp (210); the sample storage tank is characterized in that the top cover (29) is arranged at the upper end of the sample storage tank body (23) through a top cover clamp (210), the bottom cover (28) is arranged at the lower end of the sample storage tank body (23) through a bottom cover clamp (26), the gas outlet connecting pipe (21) is arranged on the top cover (29), the gas inlet connecting pipe (27) is arranged on the bottom cover (28), the outlet porous partition plate (22) and the inlet porous partition plate (25) are arranged in the sample storage tank body (23), the outlet porous partition plate (22) is arranged below the gas outlet connecting pipe (21), the inlet porous partition plate (25) is arranged above the gas inlet connecting pipe (27), the temperature measuring hole (24) is arranged on the sample storage tank body (23), and the air preheating pipe (13) is connected with the gas inlet connecting pipe (27).
3. The system for determining the spontaneous combustion tendency of a coal pile according to claim 2, wherein: the reactor thermometer (17) passes through the temperature measuring hole (24), and the measuring head is positioned in the reactor (2); and/or; the inner cylinder heater (12) is connected with an air preheating conduit (13).
4. The system for determining the spontaneous combustion tendency of a coal pile according to claim 1, wherein: the SD controller (3) comprises a data acquisition device and a temperature tracking heating device, wherein the data acquisition device is used for acquiring temperature rise data of the coal sample in the reactor (2), the temperature tracking heating device controls the inner-cylinder heater (12) to automatically heat water according to the temperature rise of the coal sample, the temperature of the water is ensured to be consistent with the temperature of the coal sample, and the heat insulation heating of the coal sample is ensured; the SD controller (3) is connected with the computer (4) through the SD measurement and control interface, and the computer (4) is connected with the electronic balance, the display and the printer.
5. The system for determining the spontaneous combustion tendency of a coal pile according to claim 1, wherein: superfine glass fiber heat-insulating cotton is arranged outside the inner cylinder (16) and the water tank (14) to keep the water temperature in the inner cylinder (16) and the water tank (14) constant, and the control precision is high.
6. The system for determining the spontaneous combustion tendency of a coal pile according to claim 1, wherein: the inner cylinder heater (12) is a variable frequency heater to ensure uniform heating of water supply, and has high control precision and good stability.
7. The system for determining the spontaneous combustion tendency of a coal pile according to claim 1, wherein: the reactor (2) is made of cylindrical polished stainless steel.
8. The system for determining the spontaneous combustion tendency of a coal pile according to claim 1, wherein: the air preheating conduit (13) is a large-diameter red copper round pipe and is uniformly arranged on the inner wall of the inner barrel (16), and the water bath plays a role of heating gas so as to ensure that the temperature entering the coal sample is consistent with the temperature of the coal sample.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208316A (en) * | 2019-05-16 | 2019-09-06 | 华电电力科学研究院有限公司 | A kind of self-ignition of coal pile tendency measurement system and measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208316A (en) * | 2019-05-16 | 2019-09-06 | 华电电力科学研究院有限公司 | A kind of self-ignition of coal pile tendency measurement system and measuring method |
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