CN114166010A - Gas detection control device and control method for centrifugal dehydration drying system - Google Patents
Gas detection control device and control method for centrifugal dehydration drying system Download PDFInfo
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- CN114166010A CN114166010A CN202111363938.6A CN202111363938A CN114166010A CN 114166010 A CN114166010 A CN 114166010A CN 202111363938 A CN202111363938 A CN 202111363938A CN 114166010 A CN114166010 A CN 114166010A
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- 238000001035 drying Methods 0.000 title claims abstract description 101
- 230000018044 dehydration Effects 0.000 title claims abstract description 98
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 98
- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 33
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 156
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 156
- 239000001301 oxygen Substances 0.000 claims abstract description 156
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 135
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 132
- 239000007789 gas Substances 0.000 claims abstract description 50
- 239000007921 spray Substances 0.000 claims abstract description 39
- 238000005507 spraying Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 abstract description 5
- 239000007787 solid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/009—Alarm systems; Safety sytems, e.g. preventing fire and explosions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
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- Microbiology (AREA)
- Centrifugal Separators (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a gas detection control device and a gas detection control method of a centrifugal dehydration drying system, which relate to the technical field of centrifugal dehydration drying.A main circulating pipeline between a circulating fan and a coal-fired generator is provided with an oxygen analyzer and a carbon monoxide analyzer; the oxygen analyzer, the carbon monoxide analyzer, the pipeline spray valve, the centrifuge housing spray valve, the centrifugal dehydration and drying integrated machine and the coal-fired generator are electrically connected with the PLC; and the oxygen alarm relay and the carbon monoxide alarm relay are electrically connected with the PLC controller. The method has the advantage that the safety of gas detection and the safety of equipment operation are ensured in the heat energy recovery process.
Description
Technical Field
The invention relates to the technical field of centrifugal dehydration and drying, in particular to a gas detection control device and a gas detection control method for a centrifugal dehydration and drying system.
Background
The sewage treatment plant and the sewage station generate sludge in the sewage treatment process, and the sludge which is not properly treated enters the environment, so that secondary pollution is directly brought to water and atmosphere, and serious threat is formed to the ecological environment and human activities.
At present, the treatment of sludge (or materials) is mainly a centrifugal dehydration drying system, and the main process (as shown in the attached figure 1 of the specification):
after the flocculation of the sludge (or materials) and the flocculant prepared by a flocculant dosing system is completed, the sludge (or materials) is conveyed to the feed end of a centrifugal dehydration and drying integrated machine (S101) through a feed system, enters a rotary drum to complete solid-liquid separation, and the solid is conveyed to a slag outlet of the rotary drum through the inner screw of a centrifugal machine and is dispersed into loose solid particles through a specially designed structure and a small differential control process. The solid particles are quickly subjected to heat exchange with hot air provided by a coal-fired generator (D101) in a unique reaction cover, the drying effect is completed within a few seconds, and the hot steam is taken out of the centrifugal dehydration and drying integrated machine (S101) to complete dehydration and drying.
The dried solid powder and steam (called as 'flue gas' for short) are conveyed into a cyclone separator (F102) together to complete gas-solid separation. The solid powder is discharged through a rotary discharge valve (X101) below the cyclone separator (F102), the dried hot steam still having a certain heat value is recycled, and the dried hot steam is conveyed to the coal-fired generator (D101) through a circulating fan (V101) to be reheated and deodorized. The surplus waste gas evaporated by the heat exchange of the pipeline passes through a Venturi scrubbing cooler (F102) and is exhausted to the atmosphere after passing through a waste gas fan (V102).
The energy used by the coal-fired generator (D101) is natural gas or kerosene, the combustion efficiency of the natural gas or kerosene directly determines the efficiency and cost control of the coal-fired generator, dry powder in a pipeline is circularly filtered in a closed pipeline, potential safety hazards can exist in extreme environments, and the oxygen content and carbon monoxide in the pipeline must be controlled to ensure the safe environment in the pipeline.
The foregoing description is provided for general background information and is not admitted to be prior art.
Disclosure of Invention
The invention aims to provide a gas detection control device and a gas detection control method for a centrifugal dehydration drying system, wherein the gas detection safety and the equipment operation safety are ensured in the heat energy recovery process by the detection control device.
The invention provides a gas detection control device of a centrifugal dehydration drying system, which comprises a centrifugal dehydration drying all-in-one machine, a coal-fired generator, a cyclone separator and a circulating fan, wherein the centrifugal dehydration drying all-in-one machine comprises a centrifugal dehydration drying machine, a coal-fired generator, a cyclone separator and a circulating fan; the centrifugal dehydration and drying all-in-one machine is respectively connected with the coal-fired generator and the cyclone separator through a main circulating pipeline, the other end of the cyclone separator is connected with the circulating fan through the main circulating pipeline, and the other end of the circulating fan is connected with the coal-fired generator through the main circulating pipeline; an oxygen analyzer and a carbon monoxide analyzer for detecting the content of oxygen and carbon monoxide in the main circulation pipeline are arranged on the main circulation pipeline between the circulating fan and the coal-fired generator, a pipeline spray valve for spraying water into the main circulation pipeline is arranged on the main circulation pipeline between the centrifugal dehydration and drying all-in-one machine and the coal-fired generator, and a centrifuge housing spray valve for spraying water into the centrifugal dehydration and drying all-in-one machine is arranged on a housing of the centrifugal dehydration and drying all-in-one machine; the oxygen analyzer, the carbon monoxide analyzer, the pipeline spray valve, the centrifuge housing spray valve, the centrifugal dehydration and drying all-in-one machine and the coal-fired generator are electrically connected with a PLC (programmable logic controller); the oxygen analyzer and the carbon monoxide analyzer are respectively connected with an oxygen alarm relay and a carbon monoxide alarm relay, and the oxygen alarm relay and the carbon monoxide alarm relay are electrically connected with the PLC.
Furthermore, a cyclone separator spraying valve used for spraying water to the interior of the cyclone separator is arranged on the cyclone separator; the cyclone spraying valve is electrically connected with the PLC.
Further, the oxygen analyzer comprises a first oxygen analyzer and a second oxygen analyzer; the first oxygen analyzer and the second oxygen analyzer are both installed on a main circulation pipeline between the circulating fan and the coal-fired generator.
Further, the oxygen alarm relay comprises an oxygen standard exceeding alarm relay and an oxygen analyzer fault alarm relay.
Further, the carbon monoxide alarm relay comprises a carbon monoxide standard exceeding alarm relay and a carbon monoxide analyzer fault alarm relay.
The invention provides a control method, which is applied to the gas detection control device of the centrifugal dehydration drying system and comprises the following steps:
the concentration of oxygen and carbon monoxide is collected,
judging whether the gas detection control device of the centrifugal dehydration drying system has a concentration regulation requirement according to the concentrations of oxygen and carbon monoxide;
when the gas detection control device of the centrifugal dehydration drying system has concentration regulation,
and further adjusting the working states of the pipeline spray valve, the centrifuge housing spray valve, the oxygen alarm relay, the carbon monoxide alarm relay, the centrifugal dehydration and drying integrated machine and the coal-fired generator according to the concentrations of oxygen and carbon monoxide.
Further, judging whether the gas detection control device of the centrifugal dehydration drying system has the oxygen concentration regulation requirement according to the oxygen concentration comprises:
if the oxygen concentration is less than the first oxygen set concentration, judging that no oxygen concentration regulation requirement exists;
and if the oxygen concentration is greater than the first oxygen set concentration, judging that the oxygen concentration regulation is required.
Further, judging whether the gas detection control device of the centrifugal dehydration drying system has a carbon monoxide concentration regulation demand according to the carbon monoxide concentration includes:
if the concentration of the carbon monoxide is less than the first carbon monoxide setting concentration, judging that no carbon monoxide concentration regulation requirement exists;
and if the concentration of the carbon monoxide is greater than the first carbon monoxide set concentration, judging that the carbon monoxide concentration is required to be adjusted.
Further, the determining the working state of the gas detection control device of the centrifugal dehydration drying system according to the oxygen concentration comprises:
if the oxygen concentration is greater than the first oxygen set concentration and less than or equal to the second oxygen set concentration, the pipeline spray valve is opened;
if the oxygen concentration is greater than the second oxygen set concentration and less than or equal to the third oxygen set concentration, the centrifugal machine housing spray valve is opened;
if the oxygen concentration is greater than the third oxygen set concentration and less than or equal to the fourth oxygen set concentration, stopping feeding and discharging of the centrifugal dehydration and drying all-in-one machine, stopping the auxiliary machine of the centrifugal dehydration and drying all-in-one machine and operating the coal-fired generator in an economic mode;
if the oxygen concentration is greater than the fourth oxygen set concentration, the centrifugal dehydration drying system is shut down, and an oxygen alarm relay gives an alarm.
Further, the determining the working state of the gas detection control device of the centrifugal dehydration drying system according to the concentration of the carbon monoxide comprises the following steps:
if the concentration of the carbon monoxide is greater than the first set concentration of the carbon monoxide and less than or equal to the second set concentration of the carbon monoxide, the pipeline spray valve is opened;
if the concentration of the carbon monoxide is greater than the second set concentration of the carbon monoxide and less than or equal to the third set concentration of the carbon monoxide, the spraying valve of the centrifugal machine housing is opened;
if the concentration of the carbon monoxide is greater than the third set concentration of the carbon monoxide and less than or equal to the fourth set concentration of the carbon monoxide, stopping feeding and discharging of the centrifugal dehydration and drying all-in-one machine, stopping the auxiliary machine of the centrifugal dehydration and drying all-in-one machine and stopping the coal-fired generator from running in an economic mode;
and if the concentration of the carbon monoxide is greater than the fourth set concentration of the carbon monoxide, stopping the auxiliary machine of the centrifugal dehydration and drying integrated machine, stopping the coal-fired generator and giving an alarm by a carbon monoxide alarm relay.
Further, the control method also comprises the step of detecting whether the oxygen analyzer breaks down, if so, the oxygen alarm relay gives an alarm, and the centrifugal dehydration drying system is stopped.
Further, the control method also comprises the step of detecting whether the carbon monoxide analyzer fails, if so, the carbon monoxide alarm relay gives an alarm, and the centrifugal dehydration drying system is stopped.
According to the gas detection control device of the centrifugal dehydration drying system, the oxygen analyzer and the carbon monoxide analyzer are used for detecting the concentrations of oxygen and carbon monoxide in the main circulating pipeline, and the PLC is used for controlling the pipeline spray valve, the centrifuge housing spray valve, the centrifugal dehydration drying all-in-one machine and the coal-fired generator, so that the concentrations of oxygen and carbon monoxide in the main circulating pipeline are adjusted, and the safety of gas detection and the safety of equipment operation are ensured in the heat energy recovery process.
Drawings
FIG. 1 is a process diagram of a prior art spin-drying system.
Fig. 2 is a block diagram of a gas detection control device of a centrifugal dehydration drying system according to an embodiment of the present invention.
Fig. 3 is a process diagram of the gas detection and control device of fig. 2.
Fig. 4 is a flowchart of an oxygen concentration control method of the gas detection control device of fig. 2.
Fig. 5 is a flowchart of a carbon monoxide concentration control method of the gas detection control device shown in fig. 2.
The reference numerals and components referred to in the drawings are as follows:
1. centrifugal dehydration and drying integrated machine 2 and coal-fired generator
3. Cyclone 4, circulating fan
5. Oxygen analyzer 6 and carbon monoxide analyzer
7. Pipeline spray valve 8 and centrifuge housing spray valve
9. PLC controller 10, oxygen warning relay
11. Carbon monoxide alarm relay 12, cyclone separator spray valve
13. A first oxygen analyzer 14 and a second oxygen analyzer
15. Oxygen standard exceeding alarm relay 16 and oxygen analyzer fault alarm relay
17. Carbon monoxide standard exceeding alarm relay 18 and carbon monoxide analyzer fault alarm relay
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The terms first, second, third, fourth and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example 1
Fig. 2 is a block diagram of a gas detection control device of a centrifugal dehydration drying system according to an embodiment of the present invention, and fig. 3 is a process diagram of the gas detection control device in fig. 2. Referring to fig. 2 and 3, the gas detection and control device of the centrifugal dehydration drying system provided in the present embodiment includes a centrifugal dehydration drying all-in-one machine 1, a coal-fired generator 2, a cyclone separator 3, and a circulating fan 4; the centrifugal dehydration and drying integrated machine 1 is respectively connected with the coal-fired generator 2 and the cyclone separator 3 through a main circulating pipeline, the other end of the cyclone separator 3 is connected with the circulating fan 4 through the main circulating pipeline, and the other end of the circulating fan 4 is connected with the coal-fired generator 2 through the main circulating pipeline;
an oxygen analyzer 5 and a carbon monoxide analyzer 6 for detecting the contents of oxygen and carbon monoxide in the main circulation pipeline are arranged on the main circulation pipeline between the circulating fan 4 and the coal-fired generator 2; further, the oxygen analyzer 5 includes a first oxygen analyzer 13 and a second oxygen analyzer 14; the first oxygen analyzer 13 and the second oxygen analyzer 14 are both installed on the main circulation pipe between the circulation fan 4 and the coal-fired generator 2. It should be noted that the oxygen concentration is an extremely important parameter in the process of the centrifugal dehydration drying system, and the oxygen concentration is monitored by designing the first oxygen analyzer 13 and the second oxygen analyzer 14, so as to prevent potential safety hazard to the process caused by damage to one of the oxygen analyzers.
A pipeline spray valve 7 for spraying water into the main circulation pipeline is arranged on the main circulation pipeline between the centrifugal dehydration drying all-in-one machine 1 and the coal-fired generator 2, and a centrifuge housing spray valve 8 for spraying water into the centrifugal dehydration drying all-in-one machine 1 is arranged on a housing of the centrifugal dehydration drying all-in-one machine 1; the water spray is mainly used for reducing the concentration of oxygen and carbon monoxide;
the oxygen analyzer 5, the carbon monoxide analyzer 6, the pipeline spray valve 7, the centrifuge housing spray valve 8, the centrifugal dehydration and drying integrated machine 1 and the coal-fired generator 2 are electrically connected with the PLC 9; oxygen alarm relay 10 and carbon monoxide alarm relay 11 are connected to oxygen analyzer 5 and carbon monoxide analyzer 6 respectively, and oxygen alarm relay 10 and carbon monoxide alarm relay 11 all with PLC controller 9 electric connection.
It should be noted that the oxygen analyzer 5 and the carbon monoxide analyzer 6 are used for detecting the concentration of oxygen and carbon monoxide, and transmit information to the PLC controller 9 through analog electric signals, and control the pipeline spray valve 7, the centrifuge housing spray valve 8, the centrifugal dehydration and drying integrated machine 1 and the working state of the coal-fired generator 2 through the PLC controller 9, so as to adjust the concentration of oxygen and carbon monoxide, and ensure the safety of gas detection and the safety of equipment operation in the heat energy recovery process of the centrifugal dehydration and drying system.
Further, a cyclone spraying valve 12 for spraying water to the inside of the cyclone 3 is installed on the cyclone 3; the cyclone spraying valve 12 is electrically connected with the PLC 9. The cyclone 3 is provided with a cyclone shower valve 12 to further accelerate the reduction of the oxygen and carbon monoxide concentrations.
Further, the oxygen alarm relay 10 includes an oxygen excessive alarm relay 15 and an oxygen analyzer failure alarm relay 16. When the oxygen concentration in the main circulation pipeline exceeds a certain preset value, the oxygen exceeding alarm relay 15 gives an alarm, and when the oxygen analyzer 5 breaks down, the oxygen analyzer fault alarm relay 16 gives an alarm; the carbon monoxide alarm relay 11 comprises a carbon monoxide overproof alarm relay 17 and a carbon monoxide analyzer fault alarm relay 18. When the concentration of carbon monoxide in the main circulation pipeline exceeds a certain preset value, the carbon monoxide overproof alarm relay 17 can give an alarm, and when the carbon monoxide analyzer 6 breaks down, the carbon monoxide analyzer fault alarm relay 18 can give an alarm.
Fig. 4 is a flowchart of an oxygen concentration control method of the gas detection control device of fig. 2, and fig. 5 is a flowchart of a carbon monoxide concentration control method of the gas detection control device of fig. 2. Referring to fig. 4 and 5, an embodiment of the invention further provides a control method applied to the gas detection control device of the centrifugal dehydration drying system, which includes:
the concentration of oxygen and carbon monoxide is collected,
judging whether a gas detection control device of the centrifugal dehydration drying system has a concentration regulation requirement according to the concentrations of oxygen and carbon monoxide;
when the gas detection control device of the centrifugal dehydration drying system has concentration regulation,
further adjusting the working states of a pipeline spray valve 7, a centrifuge housing spray valve 8, an oxygen alarm relay 10, a carbon monoxide alarm relay 11, the centrifugal dehydration and drying integrated machine 1 and the coal-fired generator 2 according to the oxygen and carbon monoxide concentrations.
As shown in fig. 4, specifically, the determining whether the gas detection control device of the centrifugal dehydration drying system has the oxygen concentration regulation requirement according to the oxygen concentration includes:
if the oxygen concentration is less than the first oxygen set concentration (e.g., 9 Vol%), determining that there is no oxygen concentration adjustment requirement;
and if the oxygen concentration is greater than the first oxygen set concentration, judging that the oxygen concentration regulation is required.
As shown in fig. 5, specifically, the determining whether the gas detection control device of the centrifugal dehydration drying system has the carbon monoxide concentration adjustment requirement according to the carbon monoxide concentration includes:
if the concentration of the carbon monoxide is less than the first set concentration of the carbon monoxide (for example, 800ppm), determining that no carbon monoxide concentration adjustment is required;
and if the concentration of the carbon monoxide is greater than the first carbon monoxide set concentration, judging that the carbon monoxide concentration is required to be adjusted.
As shown in fig. 4, the determining the operating state of the gas detection control device of the centrifugal dehydration drying system according to the oxygen concentration includes:
if the oxygen concentration is greater than the first oxygen set concentration and less than or equal to the second oxygen set concentration (for example, 9.5 Vol%), the pipeline spray valve 7 is opened; it should be noted that the inline shower valve 7 is intermittently opened/closed to avoid excessive spraying.
If the oxygen concentration is greater than the second oxygen set concentration and less than or equal to a third oxygen set concentration (for example, 9.8 Vol%), the spraying valve 8 of the centrifuge housing is opened; it should be noted that the centrifuge housing shower valve 8 is intermittently opened/closed to avoid excessive spraying.
If the oxygen concentration is greater than the third oxygen set concentration and less than or equal to the fourth oxygen set concentration (for example, 10 Vol%), stopping feeding and discharging of the centrifugal dehydration drying all-in-one machine 1, stopping the auxiliary machine of the centrifugal dehydration drying all-in-one machine 1 and operating the coal-fired generator 2 in an economic mode;
if the oxygen concentration is higher than the fourth oxygen set concentration, the centrifugal dehydration drying system is stopped, and the oxygen alarm relay 10 gives an alarm.
As shown in fig. 5, the determining the operation state of the gas detection control device of the centrifugal dehydration drying system according to the carbon monoxide concentration includes:
if the concentration of the carbon monoxide is greater than the first set concentration of the carbon monoxide and less than or equal to the second set concentration of the carbon monoxide (for example, 900ppm), the pipeline spray valve 7 is opened; it should be noted that the inline shower valve 7 is intermittently opened/closed to avoid excessive spraying.
If the concentration of the carbon monoxide is greater than the second set concentration of the carbon monoxide and less than or equal to the third set concentration of the carbon monoxide (for example, 1100ppm), the spraying valve 8 of the centrifuge housing is opened; it should be noted that the centrifuge housing shower valve 8 is intermittently opened/closed to avoid excessive spraying.
If the concentration of the carbon monoxide is greater than the third set concentration of the carbon monoxide and less than or equal to the fourth set concentration of the carbon monoxide (for example, 1300ppm), stopping feeding and discharging of the centrifugal dehydration drying all-in-one machine 1, stopping the auxiliary machine of the centrifugal dehydration drying all-in-one machine 1 and operating the coal-fired generator 2 in an economic mode;
if the concentration of the carbon monoxide is greater than the set concentration of the fourth carbon monoxide, the auxiliary machine of the centrifugal dehydration and drying integrated machine 1 is stopped, the coal generator 2 is stopped, and the carbon monoxide alarm relay 11 gives an alarm.
With further reference to fig. 4 and 5, the control method further includes detecting whether the oxygen analyzer 5 fails, and if so, alarming by the oxygen alarm relay 10, and shutting down the centrifugal dehydration drying system. The control method also comprises the steps of detecting whether the carbon monoxide analyzer 6 breaks down or not, and if the carbon monoxide analyzer breaks down, alarming by a carbon monoxide alarm relay 11, and stopping the centrifugal dehydration drying system.
Based on the above description, the present invention has the following advantages:
1. according to the gas detection control device of the centrifugal dehydration drying system, provided by the invention, the oxygen analyzer 5 and the carbon monoxide analyzer 6 are used for detecting the concentrations of oxygen and carbon monoxide, transmitting information to the PLC 9 through analog electric signals, and controlling the working states of the pipeline spray valve 7, the centrifuge housing spray valve 8, the centrifugal dehydration drying all-in-one machine 1 and the coal-fired generator 2 through the PLC 9 so as to adjust the concentrations of oxygen and carbon monoxide, so that the centrifugal dehydration drying system can ensure the safety of gas detection and the safety of equipment operation in the heat energy recovery process.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (12)
1. A gas detection control device of a centrifugal dehydration drying system comprises a centrifugal dehydration drying all-in-one machine (1), a coal-fired generator (2), a cyclone separator (3) and a circulating fan (4); the centrifugal dehydration and drying integrated machine (1) is respectively connected with the coal-fired generator (2) and the cyclone separator (3) through a main circulating pipeline, the other end of the cyclone separator (3) is connected with the circulating fan (4) through the main circulating pipeline, and the other end of the circulating fan (4) is connected with the coal-fired generator (2) through the main circulating pipeline; the coal drying system is characterized in that an oxygen analyzer (5) and a carbon monoxide analyzer (6) for detecting the content of oxygen and carbon monoxide in a main circulation pipeline are installed on the main circulation pipeline between the circulating fan (4) and the coal generator (2), a pipeline spray valve (7) for spraying water into the main circulation pipeline is installed on the main circulation pipeline between the centrifugal dehydration drying all-in-one machine (1) and the coal generator (2), and a centrifuge housing spray valve (8) for spraying water into the centrifugal dehydration drying all-in-one machine (1) is installed on a housing of the centrifugal dehydration drying all-in-one machine (1);
the oxygen analyzer (5), the carbon monoxide analyzer (6), the pipeline spray valve (7), the centrifuge housing spray valve (8), the centrifugal dehydration and drying all-in-one machine (1) and the coal-fired generator (2) are electrically connected with a PLC (programmable logic controller) (9); oxygen analysis appearance (5) with be connected with oxygen warning relay (10) and carbon monoxide warning relay (11) on carbon monoxide analysis appearance (6) respectively, oxygen warning relay (10) with carbon monoxide warning relay (11) all with PLC controller (9) electric connection.
2. The gas detection and control device of the centrifugal dehydration drying system according to claim 1, characterized in that a cyclone spraying valve (12) for spraying water to the inside of the cyclone (3) is installed on the cyclone (3); the cyclone separator spray valve (12) is electrically connected with the PLC (9).
3. The gas detection and control apparatus of a centrifugal dehydration drying system according to claim 1, characterized in that said oxygen analyzer (5) comprises a first oxygen analyzer (13) and a second oxygen analyzer (14); the first oxygen analyzer (13) and the second oxygen analyzer (14) are both installed on a main circulation pipeline between the circulating fan (4) and the coal-fired generator (2).
4. The gas detection and control device of a centrifugal dehydration drying system according to claim 1, characterized in that said oxygen alarm relay (10) comprises an oxygen out-of-standard alarm relay (15) and an oxygen analyzer failure alarm relay (16).
5. The gas detection and control device of a centrifugal dehydration drying system according to claim 1, characterized in that said carbon monoxide alarm relay (11) comprises a carbon monoxide over standard alarm relay (17) and a carbon monoxide analyzer failure alarm relay (18).
6. A control method applied to the gas detection control device of the centrifugal dehydration drying system of claim 1, characterized by comprising:
the concentration of oxygen and carbon monoxide is collected,
judging whether the gas detection control device of the centrifugal dehydration drying system has a concentration regulation requirement according to the concentrations of oxygen and carbon monoxide;
when the gas detection control device of the centrifugal dehydration drying system has concentration regulation,
and further adjusting the working states of the pipeline spray valve (7), the centrifuge housing spray valve (8), the oxygen alarm relay (10), the carbon monoxide alarm relay (11), the centrifugal dehydration and drying integrated machine (1) and the coal-fired generator (2) according to the concentrations of oxygen and carbon monoxide.
7. The control method of claim 6, wherein the step of determining whether the gas detection control device of the centrifugal dehydration drying system has the oxygen concentration regulation requirement according to the oxygen concentration comprises the following steps:
if the oxygen concentration is less than the first oxygen set concentration, judging that no oxygen concentration regulation requirement exists;
and if the oxygen concentration is greater than the first oxygen set concentration, judging that the oxygen concentration regulation is required.
8. The control method of claim 6, wherein the step of determining whether the gas detection control device of the centrifugal dehydration drying system has the carbon monoxide concentration regulation requirement according to the carbon monoxide concentration comprises the following steps:
if the concentration of the carbon monoxide is less than the first carbon monoxide setting concentration, judging that no carbon monoxide concentration regulation requirement exists;
and if the concentration of the carbon monoxide is greater than the first carbon monoxide set concentration, judging that the carbon monoxide concentration is required to be adjusted.
9. The control method of claim 7, wherein determining the operating state of the gas detection control device of the centrifugal dehydration drying system according to the oxygen concentration comprises:
if the oxygen concentration is greater than the first oxygen set concentration and less than or equal to the second oxygen set concentration, the pipeline spray valve (7) is opened;
if the oxygen concentration is greater than the second oxygen set concentration and less than or equal to the third oxygen set concentration, the centrifuge housing spray valve (8) is opened;
if the oxygen concentration is greater than the third oxygen set concentration and less than or equal to the fourth oxygen set concentration, stopping feeding and discharging of the centrifugal dehydration and drying all-in-one machine (1), stopping an auxiliary machine of the centrifugal dehydration and drying all-in-one machine (1) and operating the coal-fired generator (2) in an economic mode;
if the oxygen concentration is greater than the fourth oxygen set concentration, the centrifugal dehydration drying system is shut down, and the oxygen alarm relay (10) gives an alarm.
10. The control method according to claim 8, wherein determining the operating state of the gas detection control device of the centrifugal dehydration drying system according to the carbon monoxide concentration comprises:
if the concentration of the carbon monoxide is greater than the first set concentration of the carbon monoxide and less than or equal to the second set concentration of the carbon monoxide, the pipeline spray valve (7) is opened;
if the concentration of the carbon monoxide is greater than the second set concentration of the carbon monoxide and less than or equal to the third set concentration of the carbon monoxide, the spraying valve (8) of the centrifuge housing is opened;
if the concentration of the carbon monoxide is greater than the third set concentration of the carbon monoxide and less than or equal to the fourth set concentration of the carbon monoxide, stopping feeding and discharging of the centrifugal dehydration and drying all-in-one machine (1), stopping an auxiliary machine of the centrifugal dehydration and drying all-in-one machine (1) and operating the coal-fired generator (2) in an economic mode;
if the concentration of the carbon monoxide is greater than the set concentration of the fourth carbon monoxide, stopping the auxiliary machine of the centrifugal dehydration and drying integrated machine (1) and stopping the coal-fired generator (2), and alarming by a carbon monoxide alarm relay (11).
11. The control method according to claim 5, characterized in that the control method further comprises the steps of detecting whether the oxygen analyzer (5) is in failure, and if the oxygen analyzer is in failure, an oxygen alarm relay (10) alarms and a centrifugal dehydration drying system is stopped.
12. The control method according to claim 5, characterized in that the control method further comprises the step of detecting whether the carbon monoxide analyzer (6) breaks down, if so, the carbon monoxide alarm relay (11) gives an alarm, and the centrifugal dehydration drying system is stopped.
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