CN209816047U - Coal catalytic gasification safety monitoring system - Google Patents
Coal catalytic gasification safety monitoring system Download PDFInfo
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- CN209816047U CN209816047U CN201920502343.6U CN201920502343U CN209816047U CN 209816047 U CN209816047 U CN 209816047U CN 201920502343 U CN201920502343 U CN 201920502343U CN 209816047 U CN209816047 U CN 209816047U
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Abstract
The utility model discloses a coal catalytic gasification safety monitoring system, which comprises a coal catalytic gasification device, a detection mechanism, a PLC controller and an actuating mechanism; through the reasonable position that sets up all kinds of detection device, can carry out real-time detection to the operational aspect, the risk that can predict to exist, through the reasonable quantity that sets up all kinds of detection device, avoid the misjudgement, the degree of accuracy of risk prediction has been improved, can in time carry out the action of stopping when the abnormal conditions appears, can avoid taking place in the production process and leaking, overtemperature, superpressure etc. and not stopping in time and causing serious consequence takes place, the safe and stable operation of assurance system, can realize the construction of coal catalytic gasification technical industry device.
Description
The technical field is as follows:
the utility model relates to a coal chemical industry field especially relates to a coal catalytic gasification safety monitoring system.
Background art:
the coal catalytic gasification technology is an important mode for clean and efficient utilization of coal, and the coal is mixed with water vapor (H) at a relatively low temperature by adopting the coal catalytic gasification technology2O), oxygen (O)2) The gasification agent of the composition is subjected to gasification reaction under the catalytic action of a catalyst to generate high-concentration methane (CH)4). Compared with other coal gasification technologies, the coal catalytic gasification technology has the advantages of high methane content, low temperature required by gasification reaction and the like. At present, the coal catalytic gasification technology is still in an analog simulation stage after years of experiments, and no corresponding industrial device is provided. Because the coal catalytic gasification technology has harsh technological conditions and is accompanied with chemical reaction, heat transfer and mass transfer, if the conditions of leakage, over-temperature, over-pressure and the like occur in the production process, serious consequences are generated: in the production process of catalytic coal gasification, raw material coal, oxygen and steam react in a fluidized bed reactor at 750 ℃ to generate crude synthesis gas, wherein the crude synthesis gas contains hydrogen, carbon monoxide, hydrogen sulfide, carbon dioxide and the like; when overtemperature, overpressure and leakage occur in the system, the crude synthesis gas can cause fire, and carbon monoxide and hydrogen sulfide can also cause personnel poisoning; the coal powder feeding, ash discharging and fly ash discharging of the fluidized bed reactor are all intermittent operations, and gate poles in the system are easy to abrade to cause process medium leakage, so that dangerous accidents such as fire, explosion and the like are caused; the over-temperature explosion accident can also happen due to improper proportion of the coal powder, the steam and the oxygen; when the furnace is stopped, if oxygen continues to enter the fluidized bed reactor and meets with combustible materials reserved in the furnace, explosion can also occur in the interior of the furnaceFrying; in addition, when the pressure of the raw materials is low, the materials in the fluidized bed reactor can be caused to flow back and forth, and fire explosion can be caused.
Therefore, the combination of the coal catalytic gasification process to predict risks and the design of an adaptive safety monitoring system is a key point for preventing dangerous accidents and is a technical difficulty for building industrial devices of the coal catalytic gasification technology.
The utility model has the following contents:
the utility model aims to provide a safe, reliable and stable coal catalytic gasification safety monitoring system;
the utility model discloses following technical scheme implements:
the coal catalytic gasification safety monitoring system comprises a coal catalytic gasification device, a detection mechanism, a PLC (programmable logic controller) and an execution mechanism;
the detection mechanism is connected with the PLC in a wired or wireless mode; the detection mechanism is used for detecting the operating temperature, the operating pressure and the oxygen content data of the coal catalytic gasification device and transmitting the detected operating temperature, operating pressure and oxygen content data to the PLC;
the PLC is connected with the actuating mechanism in a wired or wireless mode, and analyzes the received operating temperature, operating pressure and oxygen content data and controls the actuating mechanism to execute actions.
Further, the coal catalytic gasification device comprises a high-pressure coal bucket, a star-shaped feeder, a fluidized bed reactor, a steam generation device, an oxygen source, a chilling chamber, a primary cyclone separator, a secondary cyclone separator, an immersed dust collector and a synthetic gas storage tank;
the discharge port of the high-pressure coal hopper is communicated with the feed port of the star-shaped feeder, the discharge port of the star-shaped feeder is communicated with the feed port of the fluidized bed reactor through a coal feeding pipeline, the steam outlet of the steam generating device is divided into two paths, one path is communicated with the steam inlet of the distribution plate steam pipeline through the distribution plate steam pipeline, and the other path is communicated with the steam inlet of the central pipe steam pipeline through the central pipe steam pipeline; the gas outlet of the oxygen source is divided into two paths, one path is communicated with the steam inlet of the distribution plate steam oxygen pipeline through the distribution plate oxygen pipeline, and the other path is communicated with the steam inlet of the central pipe steam oxygen pipeline through the central pipe oxygen pipeline; the steam outlet of the steam pipeline of the distribution plate is communicated with the steam inlet of the distribution plate of the fluidized bed reactor, and the steam outlet of the steam pipeline of the central pipe is communicated with the air inlet of the central pipe of the fluidized bed reactor; the slag outlet of the fluidized bed reactor is communicated with the slag inlet of the chilling chamber, the synthetic gas outlet of the fluidized bed reactor is communicated with the gas inlet of the primary cyclone separator through a pipeline, the gas outlet of the primary cyclone separator is communicated with the gas inlet of the secondary cyclone separator through a pipeline, the gas outlet of the secondary cyclone separator is communicated with the gas inlet of the immersion type dust remover through a pipeline, the gas outlet of the immersion type dust remover is communicated with the gas inlet of the synthetic gas storage tank through a synthetic gas pipeline, the discharge outlet of the secondary cyclone separator is communicated with the feed back port of the primary cyclone separator through a pipeline, and the discharge outlet of the primary cyclone separator is communicated with the feed back port of the fluidized bed reactor through a pipeline;
one end of an emptying pipeline is communicated with the air outlet of the immersed dust remover, and the other end of the emptying pipeline is emptied; one end of the pressure relief pipeline is communicated with the air inlet of the synthetic gas storage tank, and the other end of the pressure relief pipeline is emptied.
Further, the detection mechanism comprises at least one first temperature detection device arranged on the distribution plate, at least one second temperature detection device, an oxygen content analyzer and at least one first pressure detection device arranged on the synthesis gas pipeline, at least one second pressure detection device arranged at the bed layer of the fluidized bed reactor, at least one third pressure detection device arranged at the expanded section of the fluidized bed reactor, at least one fourth pressure detection device arranged in the high-pressure coal hopper, at least one fifth pressure detection device arranged at the synthesis gas outlet of the fluidized bed reactor, at least one sixth pressure detection device arranged in the chilling chamber, at least one seventh pressure detection device arranged on the steam pipeline of the distribution plate, at least one eighth pressure detection device arranged on the oxygen pipeline of the distribution plate, at least one ninth pressure detection device arranged on the central pipe steam pipeline, at least one tenth pressure detection device arranged on the central pipe steam pipeline, at least one eleventh pressure detection device arranged on the central pipe oxygen pipeline, and at least one twelfth pressure detection device arranged on the central pipe steam pipeline;
the first temperature detection device, the second temperature detection device, the oxygen content analyzer, the first pressure detection device, the second pressure detection device, the third pressure detection device, the fourth pressure detection device, the fifth pressure detection device, the sixth pressure detection device, the seventh pressure detection device, the eighth pressure detection device, the ninth pressure detection device, the tenth pressure detection device, the eleventh pressure detection device, and the twelfth pressure detection device are all connected with a signal input end of the PLC controller.
Further, the number of the first temperature detection device, the second temperature detection device, the first pressure detection device, the second pressure detection device, the third pressure detection device, the fourth pressure detection device, the fifth pressure detection device, the sixth pressure detection device, the seventh pressure detection device, the eighth pressure detection device, the ninth pressure detection device, the tenth pressure detection device, the eleventh pressure detection device, and the twelfth pressure detection device is 3.
Further, the first temperature detection device and the second temperature detection device are both temperature sensors, and the first pressure detection device, the second pressure detection device, the third pressure detection device, the fourth pressure detection device, the fifth pressure detection device, the sixth pressure detection device, the seventh pressure detection device, the eighth pressure detection device, the ninth pressure detection device, the tenth pressure detection device, the eleventh pressure detection device, and the twelfth pressure detection device are all pressure sensors.
Furthermore, the executing mechanism comprises a distribution plate oxygen stop valve arranged on the distribution plate oxygen pipeline, a central pipe oxygen stop valve arranged on the central pipe oxygen pipeline, a coal discharge stop valve arranged on the coal discharge pipeline, a crude gas stop valve arranged on the synthetic gas pipeline, a pressure relief regulating valve arranged on the pressure relief pipeline and a high-point emptying regulating valve arranged on the emptying pipeline;
the distribution plate oxygen shut-off valve, the central pipe oxygen shut-off valve, the start-stop motor of the star-shaped feeder, the coal discharge shut-off valve, the raw gas shut-off valve, the pressure relief regulating valve and the high point air relief regulating valve are all connected with the signal output end of the PLC.
The utility model has the advantages that:
the utility model discloses a reasonable position that sets up all kinds of detection device, can carry out real-time detection to the operational aspect, the risk that predictability probably exists, through the reasonable quantity that sets up all kinds of detection device, avoid the misjudgement, the degree of accuracy of risk prediction has been improved, can in time carry out the action of parkking when the abnormal conditions appears, can avoid taking place to leak in the production process, the overtemperature, the condition such as superpressure and do not in time parkking the serious consequence that causes takes place, the safety and stability of assurance system moves, can realize the construction of coal catalysis gasification technical industry device.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the system configuration of embodiment 1;
FIG. 2 is a control schematic diagram of embodiment 1;
in the figure: the system comprises a high-pressure coal hopper 1, a star-shaped feeder 2, a fluidized bed reactor 3, a steam generating device 4, an oxygen source 5, a chilling chamber 6, a primary cyclone separator 7, a secondary cyclone separator 8, an immersion type dust remover 9, a synthetic gas storage tank 10, a coal feeding pipeline 11, a distribution plate steam pipeline 12, a distribution plate oxygen pipeline 13, a distribution plate steam pipeline 14, a central pipe steam pipeline 15, a central pipe oxygen pipeline 16, a central pipe steam pipeline 17, a synthetic gas pipeline 18, a first temperature detection device 19, a second temperature detection device 20, an oxygen content analyzer 21, a first pressure detection device 22, a second pressure detection device 23, a third pressure detection device 24, a fourth pressure detection device 25, a fifth pressure detection device 26, a sixth pressure detection device 27, a seventh pressure detection device 28, an eighth pressure detection device 29, a ninth pressure detection device 30, a first pressure detection device, a second pressure detection device, a third pressure detection device 24, a fourth pressure detection, A tenth pressure detection device 31, an eleventh pressure detection device 32, a twelfth pressure detection device 33, a PLC 34, a distribution plate oxygen shut-off valve 35, a central pipe oxygen shut-off valve 36, a start-stop motor 37, a coal discharge shut-off valve 38, a raw gas shut-off valve 39, a pressure relief regulating valve 40, a high point vent regulating valve 41, a pressure relief pipeline 43 and a vent pipeline 44.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
the coal catalytic gasification safety monitoring system shown in fig. 1 and 2 comprises a coal catalytic gasification device, a detection mechanism, a PLC controller 34 and an execution mechanism;
the detection mechanism is connected with the PLC 34 in a wired or wireless mode; the detection mechanism is used for detecting the operating temperature, the operating pressure and the oxygen content data of the coal catalytic gasification device and transmitting the detected operating temperature, operating pressure and oxygen content data to the PLC 34;
the PLC 34 is connected with the executing mechanism in a wired or wireless mode, and the PLC 34 analyzes the received operating temperature, operating pressure and oxygen content data and controls the executing mechanism to execute actions.
The coal catalytic gasification device comprises a high-pressure coal bucket 1, a star-shaped feeder 2, a fluidized bed reactor 3, a steam generating device 4, an oxygen source 5, a chilling chamber 6, a primary cyclone separator 7, a secondary cyclone separator 8, an immersed dust collector 9 and a synthetic gas storage tank 10;
the discharge port of the high-pressure coal hopper 1 is communicated with the feed port of the star-shaped feeder 2, the discharge port of the star-shaped feeder 2 is communicated with the feed port of the fluidized bed reactor 3 through a coal feeding pipeline 11, the steam outlet of the steam generating device 4 is divided into two paths, one path is communicated with the steam inlet of a distribution plate steam pipeline 14 through a distribution plate steam pipeline 12, and the other path is communicated with the steam inlet of a central pipe steam pipeline 17 through a central pipe steam pipeline 15; the air outlet of the oxygen source 5 is divided into two paths, one path is communicated with the steam inlet of a distribution plate steam oxygen pipeline 14 through a distribution plate oxygen pipeline 13, and the other path is communicated with the steam inlet of a central pipe steam oxygen pipeline 17 through a central pipe oxygen pipeline 16; the steam outlet of the distributing plate steam oxygen pipeline 14 is communicated with the steam inlet of the distributing plate of the fluidized bed reactor 3, and the steam outlet of the central pipe steam oxygen pipeline 17 is communicated with the air inlet of the central pipe of the fluidized bed reactor 3; a slag outlet of the fluidized bed reactor 3 is communicated with a slag inlet of the chilling chamber 6, a synthetic gas outlet of the fluidized bed reactor 3 is communicated with an air inlet of a primary cyclone separator 7 through a pipeline, an air outlet of the primary cyclone separator 7 is communicated with an air inlet of a secondary cyclone separator 8 through a pipeline, an air outlet of the secondary cyclone separator 8 is communicated with an air inlet of an immersion type dust remover 9 through a pipeline, an air outlet of the immersion type dust remover 9 is communicated with an air inlet of a synthetic gas storage tank 10 through a synthetic gas pipeline 18, a discharge outlet of the secondary cyclone separator 8 is communicated with a feed back port of the primary cyclone separator 7 through a pipeline, and a discharge outlet of the primary cyclone separator 7 is communicated with a feed back port of the fluidized bed reactor 3 through a pipeline;
one end of an emptying pipeline 44 is communicated with the air outlet of the immersed dust remover 9, and the other end of the emptying pipeline 44 is emptied; one end of the pressure relief line 43 is in communication with the inlet of the syngas storage tank 10, and the other end of the pressure relief line 43 is vented.
The detection mechanism comprises 3 first temperature detection devices 19 arranged on the distribution plate, 3 second temperature detection devices 20, an oxygen content analyzer 21 and 3 first pressure detection devices 22 arranged on a synthetic gas pipeline 18, 3 second pressure detection devices 23 arranged at a bed layer of the fluidized bed reactor 3, 3 third pressure detection devices 24 arranged at an expansion section of the fluidized bed reactor 3, 3 fourth pressure detection devices 25 arranged in the high-pressure coal bunker 1, 3 fifth pressure detection devices 26 arranged at a synthetic gas outlet of the fluidized bed reactor 3, 3 sixth pressure detection devices 27 arranged in the chilling chamber 6, 3 seventh pressure detection devices 28 arranged on a steam pipeline 12 of the distribution plate, 3 eighth pressure detection devices 29 arranged on an oxygen pipeline 13 of the distribution plate, and 3 ninth pressure detection devices 30 arranged on the oxygen pipeline 14 of the distribution plate, 3 tenth pressure detection devices 31 arranged on the central pipe steam pipeline 15, 3 eleventh pressure detection devices 32 arranged on the central pipe oxygen pipeline 16, and 3 twelfth pressure detection devices 33 arranged on the central pipe steam pipeline 17;
the first temperature detection device 19, the second temperature detection device 20, the oxygen content analyzer 21, the first pressure detection device 22, the second pressure detection device 23, the third pressure detection device 24, the fourth pressure detection device 25, the fifth pressure detection device 26, the sixth pressure detection device 27, the seventh pressure detection device 28, the eighth pressure detection device 29, the ninth pressure detection device 30, the tenth pressure detection device 31, the eleventh pressure detection device 32, and the twelfth pressure detection device 33 are all connected to a signal input end of the PLC controller 34.
The first temperature detection device 19 and the second temperature detection device 20 are both temperature sensors, and the first pressure detection device 22, the second pressure detection device 23, the third pressure detection device 24, the fourth pressure detection device 25, the fifth pressure detection device 26, the sixth pressure detection device 27, the seventh pressure detection device 28, the eighth pressure detection device 29, the ninth pressure detection device 30, the tenth pressure detection device 31, the eleventh pressure detection device 32, and the twelfth pressure detection device 33 are all pressure sensors.
The execution mechanism comprises a distribution plate oxygen shut-off valve 35 arranged on a distribution plate oxygen pipeline 13, a central pipe oxygen shut-off valve 36 arranged on a central pipe oxygen pipeline 16, a coal discharge shut-off valve 38 arranged on a coal discharge pipeline 11, a raw gas shut-off valve 39 arranged on a synthetic gas pipeline 18, a pressure relief regulating valve 40 arranged on a pressure relief pipeline 43 and a high-point emptying regulating valve 41 arranged on an emptying pipeline 44;
the distribution plate oxygen shut-off valve 35, the central pipe oxygen shut-off valve 36, the start-stop motor 37 of the star feeder 2, the coal discharge shut-off valve 38, the raw gas shut-off valve 39, the pressure relief regulating valve 40 and the high point emptying regulating valve 41 are all connected with the signal output end of the PLC 34.
Example 2:
by using the monitoring method of the coal catalytic gasification safety monitoring system implemented in embodiment 1, the detection mechanism detects the operating temperature, operating pressure and oxygen content data of the coal catalytic gasification device, and transmits the detected operating temperature, operating pressure and oxygen content data to the PLC controller 34; the PLC controller 34 analyzes the received operating temperature, operating pressure, and oxygen content data, and controls the actuator to perform actions.
Presetting a first temperature set value, a second temperature set value, a first pressure difference set value, a second pressure difference set value, a third pressure difference set value, a fourth pressure difference set value, a fifth pressure difference set value, a sixth pressure difference set value, a seventh pressure difference set value, an eighth pressure difference set value and an oxygen content set value in the PLC 34;
the temperature of the distribution plate of the fluidized bed reactor 3 measured by the first temperature detection device 19 is taken as a first temperature value, and the first temperature value is transmitted to the PLC 34; the temperature of the crude gas at the outlet of the immersion dust remover, which is measured by the second temperature detection device 20, is taken as a second temperature value, and the second temperature value is transmitted to the PLC 34; the pressure at the outlet of the immersion dust collector measured by the first pressure detection device 22 is taken as a first pressure value, and the first pressure value is transmitted to the PLC 34; the pressure at the bed of the fluidized bed reactor 3 measured by the second pressure detection device 23 is taken as a second pressure value, and the second pressure value is transmitted to the PLC 34; the pressure at the expanded section of the fluidized bed reactor 3 measured by the third pressure detecting device 24 is taken as a third pressure value, and the third pressure value is transmitted to the PLC controller 34; the pressure in the high-pressure coal hopper 1 measured by the fourth pressure detection device 25 is used as a fourth pressure value, and the fourth pressure value is transmitted to the PLC 34; the pressure at the outlet of the synthesis gas of the fluidized bed reactor 3 measured by the fifth pressure detection device 26 is taken as a fifth pressure value, and the fifth pressure value is transmitted to the PLC controller 34; the pressure inside the quench chamber 6 measured by the sixth pressure detection device 27 is taken as a sixth pressure value and the sixth pressure value is transmitted to the PLC controller 34; the pressure in the distribution plate steam line 12 measured by the seventh pressure detecting device 28 is taken as a seventh pressure value, and the seventh pressure value is transmitted to the PLC controller 34; the pressure in the oxygen pipeline 13 of the distribution plate measured by the eighth pressure detection device 29 is used as an eighth pressure value, and the eighth pressure value is transmitted to the PLC controller 34; the pressure in the distribution plate vapor pipeline 14 measured by the ninth pressure detection device 30 is taken as a ninth pressure value, and the ninth pressure value is transmitted to the PLC controller 34; the pressure in the central pipe steam line 15 measured by the tenth pressure detecting means 31 is taken as a tenth pressure value, and the tenth pressure value is transmitted to the PLC controller 34; the pressure in the center pipe oxygen line 16 measured by the eleventh pressure detecting device 32 is taken as an eleventh pressure value, and the eleventh pressure value is transmitted to the PLC controller 34; the pressure in the central pipe oxygen evaporation pipeline 17 measured by the twelfth pressure detection device 33 is used as a twelfth pressure value, and the twelfth pressure value is transmitted to the PLC 34; the oxygen content value in the raw gas in the synthesis gas pipeline 18 measured by the oxygen content analyzer 21 is used as an oxygen content detection value, and the oxygen content detection value is transmitted to the PLC 34;
when one of the following 11 conditions is satisfied, executing the parking action:
condition 1: the first temperature value is greater than or equal to a first temperature set value, and the first temperature set value is 850 ℃; the condition that the slag outlet is blocked by slag can occur due to the over-temperature of the distribution plate of the fluidized bed reactor 3, so that the operating condition of the fluidized bed reactor 3 is deteriorated;
condition 2: the second temperature value is greater than or equal to a second temperature set value, and the second temperature set value is 220 ℃; the excessively high outlet temperature of the submerged dust collector 9 may be caused by abnormal reaction in the fluidized-bed reactor 3;
condition 3: the second pressure value-the third pressure value is more than or equal to a first pressure difference set value, and the first pressure difference set value is 100 kPa;
condition 4: the fourth pressure value to the fifth pressure value are less than or equal to a second pressure difference set value, and the second pressure difference set value is 100 kPa; the pressure difference between the two is too low, so that the materials cannot be conveyed into the fluidized bed reactor 3 to block or the materials in the fluidized bed reactor 3 are reversed;
condition 5: the second pressure value to the sixth pressure value is less than or equal to a third pressure difference set value, and the third pressure difference set value is 20 kPa; when the pressure difference between the two is too low, the chilling chamber 6 may be in failure, and the fluidized bed reactor 3 needs to be cut off in time;
condition 6: the ninth pressure value to the fifth pressure value are less than or equal to a fourth pressure difference set value, and the fourth pressure difference set value is 180 kPa; the pressure difference between the two is too low, so that the gas is reversely connected to the steam pipeline 12 or the oxygen pipeline 13 of the distribution plate;
condition 7: the twelfth pressure value to the fifth pressure value are less than or equal to a fifth pressure difference set value, and the fifth pressure difference set value is 180 kPa; the pressure difference between the two is too low, so that the gas is reversely connected to the central pipe steam pipeline 15 or the central pipe oxygen pipeline 16;
condition 8: the eighth pressure value to the seventh pressure value are less than or equal to a sixth pressure difference set value, and the sixth pressure difference set value is 150 kPa; the pressure difference between the two is too low, so that steam enters an oxygen system;
condition 9: the eleventh pressure value to the tenth pressure value are less than or equal to a seventh pressure difference set value, and the seventh pressure difference set value is 150 kPa; similarly, the pressure difference between the two is too low, so that steam enters the oxygen system;
condition 10: the fifth pressure value-the first pressure value is not less than an eighth pressure difference set value, and the eighth pressure difference set value is 150 kPa; the pressure difference between the two is too high, so that overpressure condition occurs in the fluidized bed reactor 3 due to the blockage of the immersion dust remover 9;
condition 11: the oxygen content detection value is more than or equal to an oxygen content set value, and the oxygen content set value is 1.5 percent; the excessive oxygen content may be caused by abnormal reaction in the fluidized bed reactor 3, and the excessive oxygen content in the synthesis gas may cause great safety hazard to the normal operation of downstream devices.
Further, the parking action includes:
(1) closing the oxygen cut-off valve 35 of the distribution plate to prevent oxygen from continuously entering the fluidized bed reactor 3 through the distribution plate;
(2) closing the central tube oxygen shut-off valve 36 to prevent oxygen from continuing to enter the fluidized bed reactor 3 through the central tube;
(3) stopping the start-stop motor 37 of the star-shaped feeder 2 to prevent the raw coal from continuously entering the coal feeding pipeline 11 to cause coal blockage;
(4) closing the coal feed cut-off valve 38 to prevent the raw coal from continuously entering the fluidized bed reactor 3;
(5) closing the raw gas shut-off valve 39 to prevent unqualified synthesis gas from entering a downstream device;
(6) and opening the pressure relief regulating valve 40 and the high point vent regulating valve 41, wherein the pressure relief rate of the high point vent regulating valve 41 is 100kPa/min, and the pressure relief rate is used for relieving the pressure of the fluidized bed reactor 3 to prevent explosion accidents.
Any two first temperature values in the 3 first temperature values measured by the 3 first temperature measuring devices are greater than or equal to a first temperature set value, namely the condition 1 is judged to be met;
any two second temperature values in the 3 second temperature values measured by the 3 second temperature measuring devices are greater than or equal to the first temperature set value, namely the condition 2 is judged to be met;
any two of first pressure difference values obtained by subtracting 3 second pressure values measured by the 3 second pressure measuring devices from 3 third pressure values measured by the 3 third pressure measuring devices are larger than or equal to a first pressure difference set value, namely the condition 3 is judged to be met;
any two second pressure difference values in second pressure difference values obtained by subtracting 3 fourth pressure values measured by the 3 fourth pressure measuring devices and 3 fifth pressure values measured by the 3 fifth pressure measuring devices are less than or equal to a second pressure difference set value, namely the condition 4 is judged to be met;
any two third pressure difference values in third pressure difference values obtained by subtracting 3 second pressure values measured by the 3 second pressure measuring devices and 3 sixth pressure values measured by the 3 sixth pressure measuring devices are less than or equal to a third pressure difference set value, namely the condition 5 is judged to be met;
any two fourth pressure difference values in fourth pressure difference values obtained by subtracting 3 ninth pressure values measured by the 3 ninth pressure measuring devices and 3 fifth pressure values measured by the 3 fifth pressure measuring devices are less than or equal to a fourth pressure difference set value, namely the condition 6 is judged to be met;
any two fifth pressure difference values in fifth pressure difference values obtained by subtracting 3 twelfth pressure values measured by the 3 twelfth pressure measuring devices and 3 fifth pressure values measured by the 3 fifth pressure measuring devices are less than or equal to a fifth pressure difference set value, namely the condition 7 is judged to be met;
any two sixth pressure difference values of sixth pressure difference values obtained by subtracting 3 eighth pressure values measured by the 3 eighth pressure measuring devices from 3 seventh pressure values measured by the 3 seventh pressure measuring devices are less than or equal to a sixth pressure difference set value, that is, the condition 8 is satisfied;
any two of seventh pressure difference values obtained by subtracting 3 eleventh pressure values measured by the 3 eleventh pressure measuring devices from 3 tenth pressure values measured by the 3 tenth pressure measuring devices are less than or equal to a seventh pressure difference set value, that is, it is judged that the condition 9 is satisfied;
any two eighth pressure difference values in eighth pressure difference values obtained by subtracting 3 fifth pressure values measured by the 3 fifth pressure measuring devices and 3 first pressure values measured by the 3 first pressure measuring devices are larger than or equal to an eighth pressure difference set value, namely the condition 10 is judged to be met;
of the 3 oxygen content detection values measured by the 3 oxygen content analyzers 21, any two oxygen content detection values are greater than or equal to the oxygen content set value, that is, it is judged that the condition 11 is satisfied.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The coal catalytic gasification safety monitoring system is characterized by comprising a coal catalytic gasification device, a detection mechanism, a PLC (programmable logic controller) and an execution mechanism;
the detection mechanism is connected with the PLC in a wired or wireless mode; the detection mechanism is used for detecting the operating temperature, the operating pressure and the oxygen content data of the coal catalytic gasification device and transmitting the detected operating temperature, operating pressure and oxygen content data to the PLC;
the PLC is connected with the actuating mechanism in a wired or wireless mode, and analyzes the received operating temperature, operating pressure and oxygen content data and controls the actuating mechanism to execute actions.
2. The coal catalytic gasification safety monitoring system of claim 1, wherein the coal catalytic gasification device comprises a high-pressure coal hopper, a star-shaped feeder, a fluidized bed reactor, a steam generation device, an oxygen source, a quench chamber, a primary cyclone separator, a secondary cyclone separator, an immersion dust collector and a syngas storage tank;
the discharge port of the high-pressure coal hopper is communicated with the feed port of the star-shaped feeder, the discharge port of the star-shaped feeder is communicated with the feed port of the fluidized bed reactor through a coal feeding pipeline, the steam outlet of the steam generating device is divided into two paths, one path is communicated with the steam inlet of the distribution plate steam pipeline through the distribution plate steam pipeline, and the other path is communicated with the steam inlet of the central pipe steam pipeline through the central pipe steam pipeline; the gas outlet of the oxygen source is divided into two paths, one path is communicated with the steam inlet of the distribution plate steam oxygen pipeline through the distribution plate oxygen pipeline, and the other path is communicated with the steam inlet of the central pipe steam oxygen pipeline through the central pipe oxygen pipeline; the steam outlet of the steam pipeline of the distribution plate is communicated with the steam inlet of the distribution plate of the fluidized bed reactor, and the steam outlet of the steam pipeline of the central pipe is communicated with the air inlet of the central pipe of the fluidized bed reactor; the slag outlet of the fluidized bed reactor is communicated with the slag inlet of the chilling chamber, the synthetic gas outlet of the fluidized bed reactor is communicated with the gas inlet of the primary cyclone separator through a pipeline, the gas outlet of the primary cyclone separator is communicated with the gas inlet of the secondary cyclone separator through a pipeline, the gas outlet of the secondary cyclone separator is communicated with the gas inlet of the immersion type dust remover through a pipeline, the gas outlet of the immersion type dust remover is communicated with the gas inlet of the synthetic gas storage tank through a synthetic gas pipeline, the discharge outlet of the secondary cyclone separator is communicated with the feed back port of the primary cyclone separator through a pipeline, and the discharge outlet of the primary cyclone separator is communicated with the feed back port of the fluidized bed reactor through a pipeline;
one end of an emptying pipeline is communicated with the air outlet of the immersed dust remover, and the other end of the emptying pipeline is emptied; one end of the pressure relief pipeline is communicated with the air inlet of the synthetic gas storage tank, and the other end of the pressure relief pipeline is emptied.
3. The coal catalytic gasification safety monitoring system of claim 2, wherein the detection mechanism comprises at least one first temperature detection device arranged on the distribution plate, at least one second temperature detection device, an oxygen content analyzer and at least one first pressure detection device arranged on the syngas line, at least one second pressure detection device arranged at the fluidized bed reactor bed layer, at least one third pressure detection device arranged at the fluidized bed reactor expansion section, at least one fourth pressure detection device arranged in the high-pressure coal hopper, at least one fifth pressure detection device arranged at the syngas outlet of the fluidized bed reactor, at least one sixth pressure detection device arranged in the quench chamber, and at least one seventh pressure detection device arranged on the steam line of the distribution plate, the system comprises at least one eighth pressure detection device arranged on an oxygen pipeline of the distribution plate, at least one ninth pressure detection device arranged on an oxygen pipeline of the distribution plate, at least one tenth pressure detection device arranged on a central pipe steam pipeline, at least one eleventh pressure detection device arranged on the central pipe oxygen pipeline, and at least one twelfth pressure detection device arranged on the central pipe oxygen pipeline;
the first temperature detection device, the second temperature detection device, the oxygen content analyzer, the first pressure detection device, the second pressure detection device, the third pressure detection device, the fourth pressure detection device, the fifth pressure detection device, the sixth pressure detection device, the seventh pressure detection device, the eighth pressure detection device, the ninth pressure detection device, the tenth pressure detection device, the eleventh pressure detection device, and the twelfth pressure detection device are all connected with a signal input end of the PLC controller.
4. The coal catalytic gasification safety monitoring system according to claim 3, wherein the number of the first temperature detection device, the second temperature detection device, the first pressure detection device, the second pressure detection device, the third pressure detection device, the fourth pressure detection device, the fifth pressure detection device, the sixth pressure detection device, the seventh pressure detection device, the eighth pressure detection device, the ninth pressure detection device, the tenth pressure detection device, the eleventh pressure detection device, and the twelfth pressure detection device is 3.
5. The coal catalytic gasification safety monitoring system according to claim 4, wherein the first temperature detection device and the second temperature detection device are both temperature sensors, and the first pressure detection device, the second pressure detection device, the third pressure detection device, the fourth pressure detection device, the fifth pressure detection device, the sixth pressure detection device, the seventh pressure detection device, the eighth pressure detection device, the ninth pressure detection device, the tenth pressure detection device, the eleventh pressure detection device, and the twelfth pressure detection device are all pressure sensors.
6. The coal catalytic gasification safety monitoring system according to claim 2, wherein the execution mechanism comprises a distribution plate oxygen shut-off valve arranged on the distribution plate oxygen pipeline, a central pipe oxygen shut-off valve arranged on the central pipe oxygen pipeline, a coal discharge shut-off valve arranged on the coal discharge pipeline, a raw gas shut-off valve arranged on the synthetic gas pipeline, a pressure relief regulating valve arranged on the pressure relief pipeline, and a high point vent regulating valve arranged on the vent pipeline;
the distribution plate oxygen shut-off valve, the central pipe oxygen shut-off valve, the start-stop motor of the star-shaped feeder, the coal discharge shut-off valve, the raw gas shut-off valve, the pressure relief regulating valve and the high point air relief regulating valve are all connected with the signal output end of the PLC.
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| CN201920502343.6U CN209816047U (en) | 2019-04-12 | 2019-04-12 | Coal catalytic gasification safety monitoring system |
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| CN201920502343.6U CN209816047U (en) | 2019-04-12 | 2019-04-12 | Coal catalytic gasification safety monitoring system |
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