CN116518409B - Feeding combustion-supporting cooperative system for coal combustion - Google Patents
Feeding combustion-supporting cooperative system for coal combustion Download PDFInfo
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- CN116518409B CN116518409B CN202310407468.1A CN202310407468A CN116518409B CN 116518409 B CN116518409 B CN 116518409B CN 202310407468 A CN202310407468 A CN 202310407468A CN 116518409 B CN116518409 B CN 116518409B
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 180
- 239000003245 coal Substances 0.000 title claims abstract description 125
- 239000000463 material Substances 0.000 claims abstract description 63
- 238000009423 ventilation Methods 0.000 claims abstract description 36
- 238000012216 screening Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 14
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/04—Stationary flat screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2239/00—Fuels
- F23N2239/02—Solid fuels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2900/00—Special features of, or arrangements for controlling combustion
- F23N2900/05001—Measuring CO content in flue gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2900/00—Special features of, or arrangements for controlling combustion
- F23N2900/05002—Measuring CO2 content in flue gas
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a feeding combustion-supporting cooperative system for coal combustion, which belongs to the technical field of coal combustion and comprises a combustion furnace, a material conveying component, a detecting component, a ventilation component and a control module, wherein the material conveying component is used for conveying required coal into the combustion furnace, the detecting component is used for detecting the combustion condition of coal in the combustion furnace, the ventilation component is used for conveying air into the combustion furnace, and the control module is used for receiving signals generated by the detecting component and controlling the material conveying component and the ventilation component to operate according to the signals; according to the invention, the coal combustion condition in the combustion furnace is judged by comprehensively analyzing the CO concentration, the CO 2 concentration and the temperature in the furnace, so that the judgment result of the coal combustion is more accurate, and the corresponding coal input amount and the air intake amount are adjusted according to the judgment result, so that the occurrence of insufficient coal combustion is reduced, the waste of coal resources is reduced, and the safety of operators is ensured.
Description
Technical Field
The invention belongs to the technical field of coal combustion, and particularly relates to a feeding combustion-supporting cooperative system for coal combustion.
Background
Coal is the fossil fuel with the most abundant reserve and the most widely distributed regions on the earth. The coal is known as black gold and industrial food, is one of main energy sources used in human world in the eighteenth century, enters the twenty-first century, is a source of energy which is indispensable for the production and life of human beings for a long time after the coal has a great value which is inferior to the prior art, and the supply of the coal is also related to the stability of the development of the industry in China and even the development of the whole social aspect.
When the coal is burnt, due to the reasons of the amount of the received coal, the ventilation size, the temperature and the like, incomplete combustion of the coal is caused, a large amount of harmful gas is generated, raw materials are wasted, operators are injured, the incomplete combustion of the coal is judged by observing the color of flame in a furnace, errors are easily caused by the method, and the incomplete combustion of the coal cannot be found in time; in addition, when the existing coal is just put into the furnace for combustion, the existing coal generally falls down to a certain place in a concentrated manner and covers a combustion area, so that air is easy to be prevented from flowing in the place, the combustion of the coal is affected, and incomplete combustion of the coal is easy to occur.
Disclosure of Invention
The invention aims to provide a feeding combustion-supporting cooperative system for coal combustion, which is used for solving the problems faced in the background technology.
The aim of the invention can be achieved by the following technical scheme:
A feeding combustion-supporting cooperative system for coal combustion comprises a combustion furnace, a material conveying assembly, a detection assembly, a ventilation assembly and a control module;
the material conveying component is arranged at the inlet of the combustion furnace and is used for conveying required coal into the combustion furnace;
The detection assembly is used for detecting the combustion condition of coal in the combustion furnace and comprises a plurality of infrared thermometers which are equidistantly arranged on the furnace wall of the combustion furnace and a gas detector which is arranged on the smoke exhaust pipe of the combustion furnace;
The ventilation assemblies are arranged on two sides of the combustion furnace body and are used for conveying air into the combustion furnace;
The control module is arranged on the combustion furnace and is electrically connected with the material conveying component, the detection component and the ventilation component, and the control module is used for receiving signals generated by the detection component and controlling the material conveying component and the ventilation component to operate according to the signals.
Through above-mentioned technical scheme, this scheme can detect the burning condition in the burning furnace through infrared thermoscope and the gas detector that set up, and accessible control module drives ventilation assembly or material conveying subassembly and carries out work according to the condition that detects, adjusts the coal material volume and the air amount in the burning furnace to reduce the emergence of the insufficient burning of coal, reduced the waste of coal resource promptly and can guarantee operating personnel's safety again.
Further, the gas detector includes a CO detector for detecting a CO concentration and a CO 2 detector for detecting a CO 2 concentration.
According to the technical scheme, as the main product of the full combustion of the coal is CO 2 and the main product of the insufficient combustion is CO, the combustion condition of the coal in the furnace can be judged more clearly through the detection of the concentration of the main product and the CO.
Further, the control module obtains the concentration C co of CO detected by the CO detector and the concentration C 2 of CO detected by the CO 2 detectorAnd pass through the formula/>The combustion temperature T v in the combustion furnace is obtained, wherein T i is the temperature detected by each infrared temperature detector, n is the number of the infrared temperature detectors, and the formula/>Determining a combustion index value K in the combustion furnace, wherein alpha 1、α2、α3 is respectively expressed as a compensation coefficient of CO 2 concentration, a compensation coefficient of combustion temperature in the combustion furnace and a compensation coefficient of CO concentration,/>
The control module compares the acquired combustion index value K with a standard combustion index threshold value K w preset in the system:
If K is more than or equal to K w, the combustion in the combustion furnace is unqualified;
otherwise, the combustion in the combustion furnace is up to standard.
Through the technical scheme, the obtained CO concentration, the obtained CO 2 concentration and the obtained in-furnace combustion temperature T v are comprehensively analyzed, so that the combustion index value in the combustion furnace is obtained, when the combustion index value is greater than the standard threshold value of the system, the combustion failure in the combustion furnace can be indicated, the phenomenon of incomplete combustion of coal is likely to occur, the judgment is convenient to make in time, and the loss is reduced.
Further, the control module controls the ventilation assembly and the material conveying assembly to work according to the condition that the combustion of the combustion furnace is unqualified:
when K is E [ K w,Ky ], the coal material dosage of the next feeding of the material conveying component is reduced;
when K epsilon (K y, ++ infinity), reducing the amount of the coal fed next time by the feeding assembly and increasing the air inlet amount of the ventilation assembly, wherein K y is a threshold value preset under the condition of unqualified combustion in the system.
Through the technical scheme, the combustion condition in the furnace can be represented more by analyzing the condition that the combustion index value exceeds the range, and the more the combustion index value is greater, the more the coal is incompletely combusted, the corresponding measures can be started at the moment to timely recover the combustion or reduce the occurrence of the phenomenon of incomplete combustion of the coal, so that the coal can be conveniently and timely adjusted according to the requirements.
Further, an electric control switch valve is arranged on the ventilation assembly and used for adjusting the air inflow of air entering the combustion furnace.
Through the technical scheme, the electric control switch valve can adjust the opening size of the ventilation assembly according to the requirement, so that the air inflow can be conveniently controlled at any time.
Further, an electric control direction regulating valve is further arranged in the air outlet of the ventilation assembly, and the electric control direction regulating valve can regulate and ventilate corresponding positions according to the temperature detected by the infrared temperature detector.
Through the technical scheme, the temperatures detected by each infrared temperature detector are different, when the temperature difference in the interior of the furnace is large, the air outlet position can be adjusted through the electric control direction-adjusting valve, so that the air outlet is opposite to the position with lower temperature for air inlet, the full combustion of coal in the furnace is facilitated, and the time required for recovering the full combustion is correspondingly reduced.
Further, the control module is further used for counting a CO concentration C co size change curve detected by the CO detector in the combustion time t of the primary coal-charging material under the condition that the combustion of the combustion furnace reaches the standard, comparing the obtained CO concentration change curve with a standard CO concentration change threshold curve preset by the system, marking an area enclosed below the obtained CO concentration change curve and above the preset standard CO concentration change threshold curve as S co, and reducing the amount of coal material to be charged next time if the obtained area S co is larger than a preset standard area value S.
Through the technical scheme, under the qualified condition, the index of the CO concentration is analyzed, whether the subsequent condition of insufficient combustion of coal can occur or not can be judged, and the potential combustion condition is judged to judge whether the dosage of coal is reduced for the next feeding or not, so that the occurrence of insufficient combustion of coal can be more accurately avoided.
Further, the material conveying assembly comprises a material conveying and screening integrated machine, a screen cloth which is obliquely arranged in the material conveying and screening integrated machine, a push plate is arranged at a discharge hole of the screen cloth, the push plate is driven by an electric control pushing cylinder arranged on the material conveying and screening integrated machine, an inclined plate is arranged below the screen cloth, the tail end of the inclined plate is connected with a feeding chamber arranged on the material conveying and screening integrated machine, the feeding chamber is obliquely arranged, an electric control valve for controlling the amount of coal is arranged on the feeding chamber, a gas conveying pipe is further arranged at the top of the feeding chamber, the tail end of the gas conveying pipe is arranged in the feeding chamber and is consistent with the direction of the feeding chamber, and the head end of the gas conveying pipe is connected with the ventilation assembly.
Through above-mentioned technical scheme, the material conveying subassembly can be carrying out further screening to the coal material, avoids the incomplete emergence of burning that the coal material is too big to cause, and automatically controlled valve can be according to the instruction adjustment time of opening and shutting or the degree of opening and shutting, come the quantity that the coal material got into in the stove, two gas-supply pipes then can blow to it when the coal material falls into in the stove, can disperse the coal material, increase the area of contact of coal material and fire, can provide the air amount again, support combustion to it, reduce the incomplete emergence of burning of coal.
The invention has the beneficial effects that:
According to the invention, the coal combustion condition in the combustion furnace is judged by comprehensively analyzing the CO concentration, the CO 2 concentration and the temperature in the furnace, so that the judgment result of the coal combustion is more accurate, and the corresponding coal input amount and the air intake amount are adjusted according to the judgment result, so that the occurrence of insufficient coal combustion is reduced, the waste of coal resources is reduced, and the safety of operators is ensured.
According to the invention, the obtained CO concentration is subjected to accumulated analysis within t time, and compared with the standard CO concentration change threshold curve preset by the system, whether insufficient coal combustion occurs later or not is judged, and the potential combustion condition is judged, so that whether the coal consumption is reduced for the next feeding is judged, and the occurrence of insufficient coal combustion can be more accurately avoided.
According to the invention, the coal is screened through the material conveying component, incomplete combustion caused by large-particle coal entering the furnace is reduced, meanwhile, the screened coal can be blown through the arranged gas conveying pipe during feeding, the coal can be dispersed, the concentrated falling of the coal is avoided, the contact area of the coal and a combustion area is increased, the incomplete combustion is reduced, the air flow quantity of the coal just entering is increased through blowing, and a good combustion supporting effect can be achieved, so that the incomplete combustion of the coal is further reduced.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the material conveying assembly according to the present invention;
FIG. 3 is a schematic view of the internal part of the material conveying assembly according to the present invention;
FIG. 4 is a system block diagram of a control module according to the present invention.
The drawings illustrate:
1. A combustion furnace; 2. a material conveying component; 3. an infrared thermometer; 4. a gas detector; 5. a vent assembly; 6. a control module; 201. conveying and screening all-in-one machine; 202. a screen; 203. a push plate; 204. an electric control pushing cylinder; 205. a sloping plate; 206. a feeding chamber; 207. an electric control valve; 208. and a gas pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The utility model provides a combustion-supporting collaborative system of pay-off for coal combustion, as shown in fig. 1, including burning furnace 1, the material conveying component 2, the detection component, ventilation component 5 and control module 6, material conveying component 2 sets up the entrance at burning furnace 1, be used for carrying the required coal material to the burning furnace 1 in, the detection component is used for detecting the interior coal combustion condition of burning furnace 1, the detection component includes a plurality of infrared temperature detectors 3 that the equidistance set up on burning furnace 1 oven wall and the gas detector 4 that sets up on burning furnace 1 exhaust pipe, and gas detector 4 includes the CO detector that is used for detecting the CO concentration and the CO 2 detector that is used for detecting CO 2 concentration, ventilation component 5 sets up in the both sides of burning furnace 1 furnace body, be used for carrying the air to the burning furnace 1 in, control module 6 sets up on burning furnace 1, and with material conveying component 2, detection component and ventilation component 5 electric connection, control module 6 is used for receiving the signal that the detection component produced, and according to signal control material conveying component 2 and ventilation component 5 function, obtain the CO concentration and the gas detector 4 that the burning furnace produced and CO concentration that the burning furnace is detected by the burning furnace and CO concentration and infrared temperature detector 4 carry out the temperature detector 2, the temperature detector is little through the temperature detector 3 and the corresponding temperature of the temperature measuring component that the temperature of the material conveying component 5 is little in the burning furnace 1, the combustion condition is less than the corresponding to the combustion condition is completely adjusted to the burning furnace 1, the combustion condition is completely adjusted to the air in the corresponding opening, the combustion condition is completely adjusted to the temperature in the combustion temperature detecting module 1, and the air is completely adjusted to be less than the temperature. The ventilation assembly 5 is provided with an electric control switch valve which is used for adjusting the quantity of air inflow of air into the combustion furnace 1, the electric control switch valve is controlled by the control module 6, and the opening degree of the electric control switch valve is adjusted according to the instruction of the control module 6, so that the air inflow is convenient to control at any time; the air outlet of the ventilation assembly 5 is internally provided with an electric control direction regulating valve, the electric control direction regulating valve can regulate and ventilate corresponding positions according to the temperature detected by the infrared temperature detector 3, because the combustion space in the furnace is larger, the temperature of each position is not completely the same, when the temperature of the position in a partial area is reduced, the combustion of coal can be influenced, at the moment, the position of each temperature relatively low is detected by the infrared temperature detector 3, when the ventilation assembly 5 ventilates into the furnace, the position of the electric control direction regulating valve can be regulated by the control module 6, so that the air outlet position is regulated, the air outlet is enabled to supply air to the position with relatively low temperature, thereby being beneficial to the full combustion of the coal in the furnace, the time required for recovering the full combustion is correspondingly reduced, the combustion of the coal is reduced, and the incomplete combustion of the coal is reduced.
As shown in fig. 2 and 3, the material conveying assembly 2 comprises a material conveying and screening integrated machine 201, a screen 202 obliquely arranged is arranged in the material conveying and screening integrated machine 201, a push plate 203 is arranged at a discharge hole of the screen 202, the push plate 203 is driven by an electric control pushing cylinder 204 installed on the material conveying and screening integrated machine 201, an inclined plate 205 is arranged below the screen 202, the tail end of the inclined plate 205 is connected with a material feeding chamber 206 installed on the material conveying and screening integrated machine 201, the material feeding chamber 206 is obliquely arranged, an electric control valve 207 for controlling the amount of coal is arranged on the material feeding chamber 206, a gas conveying pipe 208 is further arranged at the top of the material feeding chamber 206, the tail end of the gas conveying pipe 208 is arranged in the material feeding chamber 206 and is consistent with the direction of the material feeding chamber 206, and the head end of the gas conveying pipe 208 is connected with the ventilation assembly 5. The integrated conveying and screening machine 201 is arranged in an inlet of the furnace and is used for conveying and screening coal, and because the coal is too large, incomplete combustion of coal is caused, when the coal is conveyed, the coal is screened, large-particle coal is left on the screen 202 and is collected through the push plate 203, small-particle coal falls into the feeding chamber 206 through the inclined plate 205, the electric control valve 207 is controlled through the control module 6, and the amount of the coal entering the furnace is changed by changing the opening and closing time of the electric control valve 207; when the coal material falls into the stove, because the coal material falls to the combustion area in a large number in the same time, the combustion area is covered by the coal in a large number and can possibly lead to the coal to burn insufficiently in a short time, and the gas pipe 208 that sets up can blow the coal after sieving when throwing the material, can disperse the coal, avoid the concentrated whereabouts of coal, increase the area of contact of coal and combustion area, reduce incomplete combustion's emergence, and can increase the air flow when the coal just enters through blowing, can play fine combustion-supporting effect, thereby further reduce the emergence of incomplete combustion of coal.
As an embodiment of the present invention, as shown in fig. 4, the embodiment provides a specific classification flow of the control module 6, which is specifically as follows:
The control module 6 obtains the concentration C co of CO detected by the CO detector and the concentration C 2 of CO detected by the CO 2 detector And pass through the formula/>The combustion temperature T v in the combustion furnace 1 is obtained, wherein T i is the temperature detected by each infrared thermometer 3, n is the number of the infrared thermometers 3, and the formula/>A combustion index value K of the combustion furnace 1 is obtained, wherein alpha 1、α2、α3 is a compensation coefficient of the CO 2 concentration, a compensation coefficient of the combustion temperature and a compensation coefficient of the CO concentration respectively,
The control module 6 compares the acquired combustion index value K with a standard combustion index threshold value K w preset in the system:
If K is more than or equal to K w, the combustion in the combustion furnace 1 is not qualified;
Otherwise, the combustion in the combustion furnace 1 is up to the standard.
In the above technical solution, since the main product generated by incomplete combustion of coal is CO, the main product generated by complete combustion is CO 2, and in addition, the temperature is a main judging factor affecting the incomplete combustion of coal, but only judging a certain factor alone is easy to generate errors, for example, when the amount of coal is small, the corresponding temperature is also reduced, but the coal is completely combusted at this time, and the temperature is inaccurate; for example, when the amount of coal is large, the generated CO and CO 2 are also correspondingly large, and the judgment is inaccurate. Thus, the scheme passes the formulaBy performing comprehensive analysis, a combustion index value K of the combustion furnace 1 is obtained, and the formula/>The fluctuation of the combustion temperature of each region in the combustion furnace 1 can be obtained, so that the difference between the temperature of each region in the combustion furnace 1 and the average value can be judged, when S is larger, the unstable temperature in the furnace is indicated, the worse combustion condition is, and in addition, as can be seen from the whole formula, when C co is larger,/>, the temperature in the furnace is higherThe lower T v, the higher K, indicates a worse combustion in furnace 1, while when C co is smaller,/>The more T v is, the smaller K is, which shows that the better the combustion condition in the combustion furnace 1 is, so that the combustion condition of the coal in the furnace can be clearly judged, the judgment result is more accurate, and in the scheme, alpha 1、α2、α3 and a standard combustion index threshold K w can be obtained according to the related historical data in a big data system, which is not described herein too.
The control module 6 controls the ventilation assembly 5 and the material conveying assembly 2 to work according to the condition that the combustion furnace 1 is unqualified in combustion:
when K is E [ K w,Ky ], the coal material dosage of the next feeding of the material conveying component is reduced;
when K epsilon (K y, ++ infinity), reducing the amount of the coal fed next time by the feeding component and increasing the air inlet amount of the ventilation component, wherein K y is a threshold value preset under the condition of unqualified combustion in the system.
In the above technical scheme, as the combustion index value K is larger, the combustion condition in the surface furnace is worse, when K e [ K w,Ky ] is considered as worse, the combustion condition in the furnace may be caused by too much reserved coal or insufficient air content, at this time, the opening or opening time of the electric control valve 207 of the material conveying assembly 2 can be reduced by the control module 6 to reduce the amount of the coal to be fed next time, and the opening of the electric control switch valve of the ventilation assembly 5 can also be increased by the control module 6 to increase the amount of air to enter; when K epsilon (K y, ++ infinity) is considered to be very undesirable in the combustion condition of the furnace, too much coal can be reserved, meanwhile, the air content is insufficient, at the moment, the opening degree of the electric control valve 207 of the material conveying assembly 2 is reduced through the control module 6, and meanwhile, the opening degree of the electric control switch valve of the ventilation assembly 5 is increased, so that adjustment is timely made according to the internal combustion condition, the time of incomplete combustion of coal is reduced to the greatest extent, waste is avoided, and the acquisition of the K y value in the scheme can be acquired according to relevant historical data in a big data system, and is not excessively introduced.
The control module 6 also counts the time-varying curve of the CO concentration C co detected by the CO detector in the condition that the combustion time t of the combustion furnace 1 reaches the standard, compares the obtained CO concentration-varying curve with a standard CO concentration-varying threshold curve preset by the system, marks the area enclosed by the lower part of the obtained CO concentration-varying curve and the upper part of the preset standard CO concentration-varying threshold curve as S co, and reduces the amount of the coal to be put next time if the obtained area S co is larger than the preset standard area value S.
In the above technical scheme, under the condition that the CO is qualified, but the CO concentration is below the standard threshold, the CO concentration is defaulted to be normal at this time, but because the CO concentration is not increased immediately, when the CO concentration is detected to exceed the standard, the incomplete combustion phenomenon already occurs in the furnace, which is too late, so that the method judges the potential combustion situation by carrying out accumulated analysis on the obtained CO concentration in the time t and comparing the obtained CO concentration with the standard CO concentration change threshold curve preset by the system, when the obtained area S co is larger than the preset standard area value S, the occurrence of the potential non-combustion phenomenon can be considered to exist in the time, when the coal is fed next time, the opening of the electric control valve 207 of the coal feeding assembly 2 is reduced by the control module 6, the coal consumption in the furnace is reduced, and the occurrence of insufficient combustion of the coal can be more accurately avoided. In the scheme, a standard CO concentration change threshold curve preset by the system and a standard area value S preset by the system are obtained by carrying out data statistics according to related data in a big data system, and are not described too much.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.
Claims (6)
1. The feeding and combustion-supporting cooperative system for coal combustion is characterized by comprising a combustion furnace (1), a feeding assembly (2), a detection assembly, a ventilation assembly (5) and a control module (6);
The material conveying component (2) is arranged at the inlet of the combustion furnace (1) and is used for conveying required coal into the combustion furnace (1);
The detection assembly is used for detecting the combustion condition of coal in the combustion furnace (1), and comprises a plurality of infrared thermometers (3) which are equidistantly arranged on the furnace wall of the combustion furnace (1) and a gas detector (4) which is arranged on the smoke exhaust pipe of the combustion furnace (1), wherein the gas detector (4) comprises a CO detector for detecting the concentration of CO and a CO 2 detector for detecting the concentration of CO 2;
The ventilation assemblies (5) are arranged on two sides of the furnace body of the combustion furnace (1) and are used for conveying air into the combustion furnace (1);
The control module (6) is arranged on the combustion furnace (1) and is electrically connected with the material conveying component (2), the detection component and the ventilation component (5), and the control module (6) is used for receiving signals generated by the detection component and controlling the material conveying component (2) and the ventilation component (5) to operate according to the signals;
The control module (6) obtains the concentration C co of CO detected by the CO detector and the concentration C 2 of CO detected by the CO 2 detector And pass through the formula/>Determining the combustion temperature T v in the combustion furnace (1), wherein T i is the temperature detected by each infrared thermometer (3), n is the number of the infrared thermometers (3), and the formula/>Determining a combustion index value K of the combustion furnace (1), wherein alpha 1、α2、α3 is the compensation coefficient of the CO 2 concentration, the compensation coefficient of the combustion temperature and the compensation coefficient of the CO concentration respectively,/>
The control module (6) compares the acquired combustion index value K with a standard combustion index threshold value K w preset in the system:
if K is more than or equal to K w, the combustion in the combustion furnace (1) is unqualified;
Otherwise, the combustion in the combustion furnace (1) is up to the standard;
the control module (6) controls the ventilation assembly (5) and the material conveying assembly (2) to work according to the condition that the combustion furnace (1) is unqualified in combustion:
When K is E [ K w,Ky ], the coal material dosage of the next feeding of the material conveying component (2) is reduced;
When K is E (K y, ++ infinity), the amount of the coal material fed by the material conveying component (2) next time is reduced, and the air inlet amount of the ventilation component (5) is increased, wherein K y is a threshold value preset under the condition of unqualified combustion in the system.
2. The feeding combustion-supporting cooperative system for coal combustion according to claim 1, wherein the ventilation assembly (5) is provided with an electric control switch valve, and the electric control switch valve is used for adjusting the air inflow of air into the combustion furnace (1).
3. The feeding combustion-supporting cooperative system for coal combustion according to claim 1, wherein an electric control direction-regulating valve is further arranged in an air outlet of the ventilation assembly (5), and the electric control direction-regulating valve can regulate and ventilate corresponding positions according to the temperature detected by the infrared temperature detector (3).
4. The feeding combustion-supporting cooperative system for coal combustion according to claim 1, wherein the control module (6) is further used for counting a time-varying curve of the concentration C co of CO detected by the CO detector in the condition that the combustion of the combustion furnace (1) reaches the standard, comparing the obtained curve of the concentration C with a standard CO concentration variation threshold value curve preset by the system, and recording an area enclosed below the obtained curve of the concentration C and above the preset standard CO concentration variation threshold value curve as S co, and if the obtained area S co is larger than a preset standard area value S, reducing the amount of coal fed next time.
5. The feeding combustion-supporting cooperative system for coal combustion according to claim 1, wherein the feeding assembly (2) comprises a feeding screening integrated machine (201), a screen (202) obliquely arranged is arranged in the feeding screening integrated machine (201), a push plate (203) is arranged at a discharge hole of the screen (202), the push plate (203) is driven by an electric control push cylinder (204) arranged on the feeding screening integrated machine (201), an inclined plate (205) is arranged below the screen (202), and the tail end of the inclined plate (205) is connected with a feeding chamber (206) arranged on the feeding screening integrated machine (201).
6. The feeding combustion-supporting cooperative system for coal combustion according to claim 5, wherein the feeding chamber (206) is obliquely arranged, an electric control valve (207) for controlling the amount of coal is arranged on the feeding chamber (206), a gas pipe (208) is further arranged at the top of the feeding chamber (206), the tail end of the gas pipe (208) is arranged in the feeding chamber (206) and is consistent with the direction of the feeding chamber (206), and the head end of the gas pipe (208) is connected with the ventilation assembly (5).
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