CN113902311B - Coal conveying method and device - Google Patents
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Abstract
The embodiment of the invention provides a coal conveying method and a device, wherein the method comprises the following steps: carrying out coal conveying on a target coal adding coal bin in the coal adding coal bins to be added; switching and judging the target coal feeding coal bin and the coal bins of the coal feeding coal bin to be fed except the target coal feeding coal bin, generating a switching result, and taking the switching coal bin as the target coal feeding coal bin to feed coal if the switching result comprises the switching coal bin; and repeatedly determining the coal bins to be added and switching and judging until the coal quantity of all the coal bins to be added meets the safety condition, so that the start and stop times of the coal conveying system can be reduced, and the energy consumption is saved.
Description
Technical Field
The invention relates to the technical field of boiler combustion, in particular to a coal conveying method and device.
Background
In the running process of the power station boiler, the coal level of the coal bin is lowered at the moment, and along with the continuous lowering of the coal level, the coal conveying system needs to be started in advance, so that raw coal required by the combustion of the coal grinding system is obtained. In the related art, an auxiliary control operator monitors the coal level of the coal bunker, and when the coal level of the coal bunker is lower than a certain coal level, the coal conveying system is manually started to feed coal to the coal bunker. However, the method makes the coal conveying system frequently started and stopped, and causes larger energy consumption.
Disclosure of Invention
The invention aims to provide a coal conveying method which can reduce the start and stop times of a coal conveying system and save energy consumption. Another object of the present invention is to provide a coal conveyor. It is yet another object of the present invention to provide a computer readable medium. It is a further object of the invention to provide a computer device.
In order to achieve the above object, one aspect of the present invention discloses a coal conveying method, comprising:
Carrying out coal conveying on a target coal adding coal bin in the coal adding coal bins to be added;
switching and judging the target coal feeding coal bin and the coal bins of the coal feeding coal bin to be fed except the target coal feeding coal bin, generating a switching result, and taking the switching coal bin as the target coal feeding coal bin to feed coal if the switching result comprises the switching coal bin;
And repeatedly determining the coal bins to be added and switching and judging until the coal quantity of all the coal bins to be added meets the safety condition.
Preferably, determining the coal bunker to be charged includes:
And determining other coal bins except the coal bin corresponding to the shutdown coal mill and the coal bin meeting the safety condition in all the coal bins as the coal bin to be added.
Preferably, before the coal is conveyed to the target coal adding bunker in the coal adding bunker, the method further comprises:
calculating the actual coal quantity, the minimum coal quantity and the consumption rate of each coal bin in the coal bins to be charged through a set first formula, and generating a plurality of first time periods, wherein the first time periods are the time consumed by the coal bins from the actual coal quantity to the minimum coal quantity;
Screening a minimum first time period from the plurality of first time periods;
Adding the minimum first time period and the current time to generate minimum coal conveying time;
and determining the coal bunker to be added corresponding to the minimum coal conveying time as a target coal bunker.
Preferably, the method further comprises:
adding the actual coal quantity of the corresponding coal bins of all the off-stream coal mills to the full coal quantity;
and if all the coal bins to be added meet the safe consumption condition, sequentially conveying the coal to all the coal bins to be added so as to ensure that the actual coal quantity of all the coal bins reaches the full coal quantity.
Preferably, the switching and judging are performed on the target coal feeding bin and the coal bins of the coal bins to be fed except for the target coal feeding bin, so as to generate a switching result, including:
Calculating the safe coal quantity, the lowest coal quantity, the coal conveying rate and the consumption rate through a set second formula to generate a second time period, wherein the second time period is the time consumed by the coal bin reaching the safe coal quantity from the lowest coal quantity under the coal conveying condition;
Adding the second time period to the first time period consumed by the coal bunker from the actual coal quantity to the lowest coal quantity, and generating a first total time consumed by the coal bunker from the actual coal quantity to the safe coal quantity;
Adding the first time periods obtained by the coal bins except the target coal-feeding coal bin according to the current actual coal quantity to preset minimum coal conveying consumption time respectively, and generating a plurality of second total times corresponding to the coal bins except the current coal conveying coal bin;
Comparing the first total time with a plurality of second total times, and judging whether at least one second total time is smaller than the first total time;
If yes, determining the minimum second total time, determining a coal bin corresponding to the minimum second total time as a switching coal bin, and generating a switching result comprising the switching coal bin;
If not, generating a switching result of continuous coal conveying.
Preferably, the safety conditions include that the actual coal amount of the coal bunker is larger than the difference between the safety coal amount and the set safety threshold; the method further comprises the steps of:
judging whether the actual coal quantity of the coal bin is larger than the difference value between the safe coal quantity and the set safe threshold value;
if yes, determining that the coal bin meets safety conditions;
if not, determining that the coal bin does not accord with the safety condition.
Preferably, the safe consumption condition comprises that the second time period consumed by the lowest coal quantity of all coal bins to be added reaches the safe coal quantity is larger than the calculated third time period, and the third time period is the minimum time consumed by the coal bins to be reduced from the safe coal quantity to the lowest coal quantity;
the method further comprises the steps of:
Judging whether the second time periods of all coal bins to be added are larger than the third time period or not;
If yes, determining that all coal bins to be added meet the safe consumption conditions; if not, determining that at least one coal bunker to be added does not meet the safe consumption condition.
The invention also discloses a coal conveying device, which comprises:
the coal conveying unit is used for conveying coal to a target coal feeding bin in the coal feeding bins;
the judging unit is used for carrying out switching judgment on the target coal adding coal bin and the coal bins except the target coal adding coal bin in the coal bins to be added, generating a switching result, and carrying out coal conveying by taking the switching coal bin as the target coal adding coal bin if the switching result comprises the switching coal bin;
And the determining unit is used for repeatedly determining the coal bins to be added and performing switching discrimination until the coal quantity of all the coal bins to be added meets the safety condition.
The invention also discloses a computer readable medium having stored thereon a computer program which when executed by a processor implements a method as described above.
The invention also discloses a computer device comprising a memory for storing information comprising program instructions and a processor for controlling the execution of the program instructions, the processor implementing the method as described above when executing the program.
The invention carries out coal conveying on a target coal adding coal bin in the coal adding coal bins to be added; switching and judging the target coal feeding coal bin and the coal bins of the coal feeding coal bin to be fed except the target coal feeding coal bin, generating a switching result, and taking the switching coal bin as the target coal feeding coal bin to feed coal if the switching result comprises the switching coal bin; and repeatedly determining the coal bins to be added and switching and judging until the coal quantity of all the coal bins to be added meets the safety condition, so that the start and stop times of the coal conveying system can be reduced, and the energy consumption is saved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the 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 a coal conveying system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a coal grinding system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a coal conveying method according to an embodiment of the present invention;
FIG. 4 is a flow chart of yet another coal conveying method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a coal conveying device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
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.
In order to facilitate understanding of the technical scheme provided by the application, the following description will explain relevant contents of the technical scheme of the application.
Fig. 1 is a schematic structural diagram of a coal conveying system according to an embodiment of the present invention, and as shown in fig. 1, the coal conveying system includes a coal plough 110, a coal conveying belt 120 and a plurality of coal bins 130. As shown in fig. 1, each coal bin 130 has a bin number (# 1- # 10), and each coal bin 130 corresponds to one plow 110.
The coal conveying system comprises two coal conveying belts 120, one coal conveying belt 120 is used for bearing and conveying raw coal, the other coal conveying belt 120 is a standby coal conveying belt, and when the running coal conveying belt 120 fails, the standby coal conveying belt is started to bear and convey the raw coal. When the coal conveying belt 120 is started, the coal conveying belt 120 carries raw coal, conveys the raw coal from a coal yard to belt positions corresponding to the coal bins 130, and inputs the raw coal at the belt positions corresponding to the coal-missing coal bins 130 into the coal-missing coal bins 130 by controlling the lifting of the coal plough 110 so as to feed the coal-missing coal bins 130. When the coal bin 130 with coal shortage is in a full coal state, raw coal borne on the running coal conveying belt 120 needs to be emptied, the power of the coal conveying belt 120 conventionally designed by a power plant is higher, and the corresponding voltage level is 10kV or 6kV, so that in order to avoid excessive waste of resources, the coal conveying system is not suitable for keeping the coal conveying belt 120 idling for a long time under the condition of not bearing raw coal. Thus, there is a need to start and stop coal delivery systems on demand, namely: the coal conveying system is started only when the coal bin 130 is lack of coal, and is stopped when the coal bin 130 lack of coal is full of coal.
As shown in fig. 1, the coal conveying system corresponds to two coal grinding systems (# 1 machine and #2 machine), each coal grinding system corresponds to a plurality of coal bins 130, taking one coal bin 130 as an example, fig. 2 is a schematic structural diagram of a coal grinding system provided in an embodiment of the present invention, and as shown in fig. 2, the coal grinding system includes a coal bin 130, a coal feeder 140, a coal dropping pipe 150, a coal mill 160 and a powder pipe 170. The coal bin 130 is designed into a cone shape, raw coal in the coal bin 130 enters the coal feeder 140, enters the coal dropping pipe 150 through the coal feeder 140, and enters the coal mill 160 through the coal dropping pipe 150 to grind coal to obtain coal dust; the pulverized coal is transported through the powder pipe 170 and enters the boiler for combustion.
When the coal level in the coal bunker is lower than the lowest coal level, potential safety hazards exist in the coal conveying system and the coal grinding system. The utility boiler is continuously expanded and stopped along with the unit load, and the coal mill and the coal feeder are frequently started and stopped. The actual power generation amount (unit load) of the power station is directly related to the actual coal burning amount and the heating value of the coal. Due to different loads, the coal feeding amount requirement of the coal feeder is continuously changed. If the independent coal bin lacks coal, the coal conveying system is started, so that the starting time of the coal conveying system is short, and the system is frequently started and stopped. Therefore, in the related art, an auxiliary control operator monitors the coal level of the coal bunker, and when the coal level in the coal bunker is lower than the lowest coal level, the coal conveying system is started manually; and when the coal bunker is in a full coal state, stopping the coal conveying system manually. Because the coal bins of the utility boiler are more, the manual operation amount is larger, and the problems of frequent start and stop of the coal conveying system and larger energy consumption exist.
In order to solve the above technical problems, a coal conveying device is taken as an execution main body for example, and a realization process of the coal conveying method provided by the embodiment of the invention is described below. It can be understood that the execution main body of the coal conveying method provided by the embodiment of the invention comprises, but is not limited to, a coal conveying device.
Fig. 3 is a flowchart of a coal conveying method according to an embodiment of the present invention, as shown in fig. 3, where the method includes:
and 101, conveying coal to a target coal adding bunker in the coal adding bunkers to be added.
102, Switching and judging the target coal feeding bin and the coal bins of the coal bins to be fed except the target coal feeding bin, generating a switching result, and conveying coal by taking the switching coal bin as the target coal feeding bin if the switching result comprises the switching coal bin.
And 103, repeatedly determining coal bins to be added and switching and judging until the coal quantity of all the coal bins to be added meets the safety condition.
In the technical scheme provided by the embodiment of the invention, coal is conveyed to a target coal adding coal bin in the coal adding coal bins to be added; switching and judging the target coal feeding coal bin and the coal bins of the coal feeding coal bin to be fed except the target coal feeding coal bin, generating a switching result, and taking the switching coal bin as the target coal feeding coal bin to feed coal if the switching result comprises the switching coal bin; and repeatedly determining the coal bins to be added and switching and judging until the coal quantity of all the coal bins to be added meets the safety condition, so that the start and stop times of the coal conveying system can be reduced, and the energy consumption is saved.
Fig. 4 is a flowchart of another coal conveying method according to an embodiment of the present invention, as shown in fig. 4, the method includes:
And 201, determining other coal bins except the coal bin corresponding to the shutdown coal mill in all the coal bins as the coal bin to be added, wherein the coal bins meet the safety conditions.
In the embodiment of the invention, each step is executed by the coal conveying device.
In the embodiment of the invention, the safety condition can be set according to the actual situation. As an alternative, the safety conditions include that the actual coal amount of the coal bunker is larger than the difference between the safety coal amount and the set safety threshold, namely: mx > M Anan (safety) -M Threshold value , where M x is the actual coal quantity and M Anan (safety) is the safe coal quantity. The safe coal quantity is a coal quantity index set according to actual conditions, and the safe threshold value is a threshold value index set according to actual conditions. For example, if the safety threshold is set to 80, the safety condition is Mx > M Anan (safety) -80. Specifically, judging whether the actual coal quantity of the coal bin is larger than the difference value between the safe coal quantity and the set safe threshold value; if yes, determining that the coal bin meets the safety condition, wherein the coal quantity in the coal bin is enough, and temporarily, coal conveying of the coal bin is not needed; if not, determining that the coal bin does not meet the safety condition, indicating that the coal amount in the coal bin is small, and conveying the coal to the coal bin is needed, otherwise, the safety problem is easily caused in the boiler combustion.
It should be noted that, the specific content of the security condition may also be set as other content, and the embodiment of the present invention does not limit the specific content of the security condition; the safe coal amount and the safe threshold value can be set to other values, and the specific values of the safe coal amount and the safe threshold value are not limited in the embodiment of the invention.
In the embodiment of the invention, the coal level of the corresponding coal bin is not lowered because the shutdown coal mill is an unoperated coal mill, so that the coal conveying of the corresponding coal bin of the shutdown coal mill is not needed temporarily. The coal bunker corresponding to the shutdown coal mill and the coal bunker meeting the safety condition are coal bunkers which do not need to convey coal temporarily, so that the coal bunkers except the coal bunker corresponding to the shutdown coal mill and the coal bunkers meeting the safety condition are the coal bunkers which need to convey coal so as to avoid danger in boiler combustion, and the coal bunkers except the coal bunker corresponding to the shutdown coal mill and the coal bunkers meeting the safety condition are determined as the coal bunkers to be added.
Step 202, calculating the actual coal quantity, the minimum coal quantity and the consumption rate of each coal bin in the coal bins to be charged through a set first formula, and generating a plurality of first time periods, wherein the first time periods are the time consumed by the coal bins from the actual coal quantity to the minimum coal quantity.
Specifically, taking a coal bin to be added as an x coal bin as an example, and passing through a first formulaAnd calculating the actual coal quantity, the minimum coal quantity and the consumption rate of each coal bin in the coal bins to be charged, and generating a first time period of x coal bins. Wherein t x1 is the first time period of the x coal bin, M x is the actual coal amount, M 0 is the minimum coal amount, and M x3 is the consumption rate. The consumption rate is the ratio of the actual total coal burning amount to the number of coal grinding machines operated, namely: /(I)The actual total coal burned is predetermined by a compliance curve given by the power plant, for example: the 660MW coal mill consumption rate was 80t/h.
Step 203, screening out the minimum first time period from the plurality of first time periods.
According to the embodiment of the invention, a plurality of coal bins are respectively calculated, a plurality of first time periods are calculated, and a first time period t x1 of an x coal bin, a first time period t y1 of a y coal bin and a first time period t z1 of a z coal bin are obtained; the smallest first time period is selected from t x1、ty1 and t z1.
In the embodiment of the invention, the first time period is the time consumed by the coal bin from the actual coal amount to the lowest coal amount, so that the coal bin corresponding to the smallest first time period is the coal bin which is fast reduced to the lowest coal amount, and the coal bin is fed with coal later.
And 204, adding the minimum first time period and the current time to generate minimum coal conveying time, and determining a coal bunker to be added corresponding to the minimum coal conveying time as a target coal bunker.
In the embodiment of the invention, the minimum coal conveying time is the time point of conveying coal to the coal bunker, so that the coal bunker is prevented from consuming to the minimum coal amount, and the safety of the boiler in the combustion process is ensured.
In the embodiment of the invention, the coal bin to be added corresponding to the minimum coal conveying time is determined as the target coal bin to determine the coal bin needing coal conveying in the subsequent process.
Step 205, conveying coal to a target coal adding bunker in the coal adding bunkers.
In the embodiment of the invention, the target coal feeding bin is fed with coal at the minimum coal feeding time so as to ensure the safety of the boiler in the combustion process.
In the embodiment of the invention, coal can be conveyed to the target coal feeding bin until the coal amount in the target coal feeding bin reaches the safe coal amount.
And 206, switching and judging the target coal feeding bin and the coal bins of the coal bins to be fed except the target coal feeding bin, generating a switching result, and conveying coal by taking the switching coal bin as the target coal feeding bin if the switching result comprises the switching coal bin.
In the embodiment of the present invention, step 206 specifically includes:
Step 2061, calculating the safe coal quantity, the minimum coal quantity, the coal conveying rate and the consumption rate according to the set second formula, and generating a second time period, wherein the second time period is the time spent by the coal bunker reaching the safe coal quantity from the minimum coal quantity under the coal conveying condition.
Specifically, by the second formulaAnd calculating the safe coal quantity, the minimum coal quantity, the coal conveying rate and the consumption rate to generate a second time period. Wherein t 1 is the second time period, M Anan (safety) is the safe coal amount, M 0 is the minimum coal amount, M 2 is the coal conveying rate, and M x3 is the consumption rate. Generally, the coal conveying rate is generally 1000-1200 t/h, and specific values are taken according to actual conditions, for example, the coal conveying rate is 1080t/h.
Step 2062, adding the second time period to the first time period consumed by the coal bunker to drop from the actual coal amount to the minimum coal amount, generating a first total time consumed by the coal bunker to reach the safe coal amount from the actual coal amount.
Taking an x coal bin as an example, adding the second time period to the first time period of the x coal bin to obtain a first total time of the x coal bin, namely: t x2＝tx1+t1, wherein t 1 is a second time period, t x2 is a first total time, and t x1 is a first time period. The first total time of the x-bin is the time that the x-bin spends from the actual amount of coal to the safe amount of coal in the event that the coal conveyor belt is started.
Step 2063, adding the first time periods obtained by the coal bins except the target coal-feeding coal bin according to the current actual coal quantity to the preset minimum coal conveying consumption time respectively, and generating a plurality of second total times corresponding to the coal bins except the current coal-feeding coal bin.
In the embodiment of the invention, the minimum coal conveying consumption time is a fixed time calculated in advance, and can be adjusted according to actual conditions. As an alternative, the method is performed by the formulaAnd calculating the actual coal quantity, the safe coal quantity, the maximum coal conveying rate and the consumption rate to obtain the minimum coal conveying consumption time. Wherein t m is the minimum coal-conveying consumption time, M Anan (safety) is the safe coal amount, and M 0 is the minimum coal amount. For example: the safe coal amount is 200t, the minimum coal amount is 100t, the maximum coal conveying rate is 1080t/h, the consumption rate is 80t/h, and the minimum coal conveying consumption time is 6 minutes.
Taking the target coal adding bin as an x coal bin as an example, and taking the coal bins except the target coal adding bin as a y coal bin and a z coal bin, adding the first time period t y1 of the y coal bin and the first time period t z1 of the z coal bin to the minimum coal conveying consumption time t m respectively to generate a second total time (t y1+tm) corresponding to the y coal bin and a second total time (t z1+tm) corresponding to the z coal bin.
Step 2064, comparing the first total time with a plurality of second total times, and judging whether at least one second total time is smaller than the first total time; if yes, go to step 2065; if not, go to step 2066.
In the embodiment of the present invention, if at least one second total time is less than the first total time, it indicates that if coal is continuously fed to the target coal-feeding coal bin, the amount of coal in at least one coal-feeding coal bin to be fed is too low, and step 2065 is continuously performed; if the second total time is greater than or equal to the first total time, indicating that there is no coal bunker to be added with too low coal amount, continuing to execute step 2066.
Step 2065, determining the minimum second total time, determining the coal bin corresponding to the minimum second total time as the switching coal bin, generating a switching result comprising the switching coal bin, and continuing to execute step 207.
In the embodiment of the invention, the coal bin corresponding to the minimum second total time is the coal bin with the lowest coal amount, in order to ensure the safety problem, coal is conveyed to the coal bin with the lowest coal amount, the coal bin corresponding to the minimum second total time is determined to be the switching coal bin, the switching result is generated, the switching result comprises the switching coal bin, and the step 207 is continuously executed. For example: if the target coal feeding bin is an x coal bin and the switching bin is a y coal bin, the coal plough of the y coal bin is lowered, the coal plough of the x coal bin is lifted, coal is conveyed to the y coal bin, and at the moment, the y coal bin is the target coal feeding bin, and the other coal bins are coal bins to be fed.
Step 2066, generating a switching result of continuous coal transportation.
In the embodiment of the invention, if the coal bin to be added with the too low coal amount does not exist, the coal is continuously conveyed to the current target coal bin to generate a switching result of continuous coal conveying.
And 207, repeatedly determining coal bins to be added and switching and judging until the coal quantity of all the coal bins to be added meets the safety condition.
In the embodiment of the invention, the safety condition can be set according to the actual situation. As an alternative, the safety conditions include that the actual coal amount of the coal bunker is larger than the difference between the safety coal amount and the set safety threshold, namely: mx > M Anan (safety) -M Threshold value , where M x is the actual coal quantity and M Anan (safety) is the safe coal quantity. The safe coal quantity is a coal quantity index set according to actual conditions, and the safe threshold value is a threshold value index set according to actual conditions. For example, if the safety threshold is set to 80, the safety condition is Mx > M Anan (safety) -80. Specifically, judging whether the actual coal quantity of the coal bin is larger than the difference value between the safe coal quantity and the set safe threshold value; if yes, determining that the coal bin meets the safety condition, wherein the coal quantity in the coal bin is enough, and temporarily, coal conveying of the coal bin is not needed; if not, determining that the coal bin does not meet the safety condition, indicating that the coal amount in the coal bin is small, and conveying the coal to the coal bin is needed, otherwise, the safety problem is easily caused in the boiler combustion.
It should be noted that, the specific content of the security condition may also be set as other content, and the embodiment of the present invention does not limit the specific content of the security condition; the safe coal amount and the safe threshold value can be set to other values, and the specific values of the safe coal amount and the safe threshold value are not limited in the embodiment of the invention.
In the embodiment of the invention, the coal amount of all coal bins to be added meets the safety condition, namely: the coal quantity of all coal bins to be added reaches the safe coal quantity, and the safety in the combustion process of the boiler can be ensured due to the sufficient coal quantity.
And step 208, adding the actual coal quantity of the corresponding coal bins of all the off-stream coal mills to the full coal quantity.
In the embodiment of the invention, under the condition that the coal quantity of all coal bins to be added is sufficient, the actual coal quantity of the coal bins corresponding to all the off-stream coal mills is added to the full coal quantity, the coal quantity of the coal bins corresponding to the off-stream coal mills is supplemented, and safety accidents caused by the fact that the coal quantity of the coal bins is small when the coal mills are started are avoided, so that the start and stop times of a coal conveying system are reduced.
In the embodiment of the invention, the minimum coal amount is smaller than the safe coal amount, and the safe coal amount is smaller than the full coal amount.
And 209, if all the coal bins to be added meet the safe consumption condition, sequentially conveying the coal to all the coal bins to be added so as to ensure that the actual coal quantity of all the coal bins reaches the full coal quantity.
In the embodiment of the invention, the safe consumption condition can be set according to the actual situation. As an alternative, the safe consumption condition includes that the second time period consumed by the lowest coal amount of all the coal bins to be added to reach the safe coal amount is larger than the calculated third time period, and the third time period is the minimum time consumed by the coal bins to drop from the safe coal amount to the lowest coal amount. By the formulaAnd calculating the safe coal amount, the minimum coal amount and the maximum consumption rate to generate a third time period. Where M Anan (safety) is the safe coal amount, M 0 is the minimum coal amount, and t n is the third time period. The maximum consumption rate is based on the maximum value of the design, for example: the maximum consumption rate was 96t/h. Specifically, judging whether the second time periods of all coal bins to be added are larger than the third time period; if yes, the coal quantity of the coal bunker to be added is sufficient, and all the coal bunkers to be added are determined to meet the safe consumption condition; if not, the coal quantity of at least one coal bin to be added is insufficient, and it is determined that the at least one coal bin to be added does not meet the safe consumption condition, and coal conveying is continuously carried out on the coal bin to be added which does not meet the safe consumption condition until the coal bin to be added meets the safe consumption condition.
In the embodiment of the invention, if all coal bins to be added meet the safe consumption condition, coal is sequentially conveyed from the tail end to the front end of the coal conveying belt to enable the actual coal quantity of all the coal bins to reach the full coal quantity, after the coal conveying system is started, the coal quantity of all the coal bins is added to the full coal quantity, and then the coal conveying system is stopped, so that the damage to the coal conveying system caused by frequent start and stop of the coal conveying system is reduced, and the energy consumption is saved.
In the technical scheme of the coal conveying method provided by the embodiment of the invention, coal is conveyed to a target coal feeding bin in the coal feeding bins; switching and judging the target coal feeding coal bin and the coal bins of the coal feeding coal bin to be fed except the target coal feeding coal bin, generating a switching result, and taking the switching coal bin as the target coal feeding coal bin to feed coal if the switching result comprises the switching coal bin; and repeatedly determining the coal bins to be added and switching and judging until the coal quantity of all the coal bins to be added meets the safety condition, so that the start and stop times of the coal conveying system can be reduced, and the energy consumption is saved.
Fig. 5 is a schematic structural diagram of a coal conveying device according to an embodiment of the present invention, where the device is configured to execute the above-mentioned coal conveying method, and as shown in fig. 5, the device includes: a coal conveying unit 11, a discriminating unit 12 and a first determining unit 13.
The coal conveying unit 11 is used for conveying coal to a target coal feeding bin in the coal feeding bins.
The judging unit 12 is configured to switch and judge the target coal feeding bin and the coal bins of the to-be-fed coal bin except for the target coal feeding bin, generate a switching result, and perform coal conveying with the switching coal bin as the target coal feeding bin if the switching result includes the switching coal bin.
The first determining unit 13 is configured to repeatedly determine the coal bins to be added and perform switching and distinguishing until the coal amounts of all the coal bins to be added meet the safety condition.
In the embodiment of the present invention, the first determining unit 13 is specifically configured to determine that other coal bins except for the coal bin corresponding to the shutdown coal mill and the coal bin meeting the safety condition in all the coal bins are coal bins to be added.
In the embodiment of the invention, the device further comprises: a first generation unit 14, a screening unit 15, a second generation unit 16 and a second determination unit 17.
The first generating unit 14 is configured to calculate, according to a set first formula, an actual coal amount, a minimum coal amount, and a consumption rate of each of the coal bins to be charged, and generate a plurality of first time periods, where the first time periods are time spent by the coal bins falling from the actual coal amount to the minimum coal amount.
The screening unit 15 is configured to screen out a minimum first time period from the plurality of first time periods.
The second generation unit 16 is configured to add the minimum first time period to the current time to generate a minimum coal conveying time.
The second determining unit 17 is configured to determine a coal bunker to be charged corresponding to the minimum coal conveying time as a target coal bunker.
In the embodiment of the invention, the coal conveying unit 11 is also used for adding the actual coal quantity of the corresponding coal bins of all the off-stream coal mills to the full coal quantity; and if all the coal bins to be added meet the safe consumption condition, sequentially conveying the coal to all the coal bins to be added so as to ensure that the actual coal quantity of all the coal bins reaches the full coal quantity.
In the embodiment of the present invention, the determining unit 12 is specifically configured to calculate, according to a set second formula, the safe coal amount, the minimum coal amount, the coal conveying rate and the consumption rate, and generate a second time period, where the second time period is a time spent by the coal bunker reaching the safe coal amount from the minimum coal amount under the coal conveying condition; adding the second time period to the first time period consumed by the coal bunker from the actual coal quantity to the lowest coal quantity, and generating a first total time consumed by the coal bunker from the actual coal quantity to the safe coal quantity; adding the first time periods obtained by the coal bins except the target coal-feeding coal bin according to the current actual coal quantity to preset minimum coal conveying consumption time respectively, and generating a plurality of second total times corresponding to the coal bins except the current coal conveying coal bin; comparing the first total time with a plurality of second total times, and judging whether at least one second total time is smaller than the first total time; if yes, determining the minimum second total time, determining a coal bin corresponding to the minimum second total time as a switching coal bin, and generating a switching result comprising the switching coal bin; if not, generating a switching result of continuous coal conveying.
In the embodiment of the present invention, the apparatus further includes a first judging unit 18.
The first judging unit 18 is used for judging whether the actual coal amount of the coal bin is larger than the difference value between the safe coal amount and the set safe threshold value; if yes, determining that the coal bin meets safety conditions; if not, determining that the coal bin does not accord with the safety condition.
In the embodiment of the invention, the device further comprises a second judging unit 19.
The second judging unit 19 is configured to judge whether the second time periods of all the coal bins to be added are greater than the third time period; if yes, determining that all coal bins to be added meet the safe consumption conditions; if not, determining that at least one coal bunker to be added does not meet the safe consumption condition.
In the scheme of the embodiment of the invention, coal is conveyed to a target coal adding coal bin in the coal adding coal bins to be added; switching and judging the target coal feeding coal bin and the coal bins of the coal feeding coal bin to be fed except the target coal feeding coal bin, generating a switching result, and taking the switching coal bin as the target coal feeding coal bin to feed coal if the switching result comprises the switching coal bin; and repeatedly determining the coal bins to be added and switching and judging until the coal quantity of all the coal bins to be added meets the safety condition, so that the start and stop times of the coal conveying system can be reduced, and the energy consumption is saved.
The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. A typical implementation device is a computer device, which may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
The embodiment of the invention provides a computer device, which comprises a memory and a processor, wherein the memory is used for storing information comprising program instructions, the processor is used for controlling the execution of the program instructions, and the program instructions realize the steps of the embodiment of the coal conveying method when being loaded and executed by the processor.
Referring now to FIG. 6, there is illustrated a schematic diagram of a computer device 600 suitable for use in implementing embodiments of the present application.
As shown in fig. 6, the computer apparatus 600 includes a Central Processing Unit (CPU) 601, which can perform various appropriate works and processes according to a program stored in a Read Only Memory (ROM) 602 or a program loaded from a storage section 608 into a Random Access Memory (RAM)) 603. In the RAM603, various programs and data required for the operation of the computer device 600 are also stored. The CPU601, ROM602, and RAM603 are connected to each other through a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
The following components are connected to the I/O interface 605: an input portion 606 including a keyboard, mouse, etc.; an output portion 607 including a Cathode Ray Tube (CRT), a liquid crystal feedback device (LCD), and the like, and a speaker, and the like; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN card, a modem, or the like. The communication section 609 performs communication processing via a network such as the internet. The drive 610 is also connected to the I/O interface 606 as needed. Removable media 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on drive 610 as needed, so that a computer program read therefrom is mounted as needed as storage section 608.
In particular, according to embodiments of the present invention, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising program code for performing the method shown in the flowchart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication portion 609, and/or installed from the removable medium 611.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
For convenience of description, the above devices are described as being functionally divided into various units, respectively. Of course, the functions of each element may be implemented in the same piece or pieces of software and/or hardware when implementing the present application.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (9)
1. A method of coal transportation, the method comprising:
Carrying out coal conveying on a target coal adding coal bin in the coal adding coal bins to be added;
Switching and judging the target coal feeding bin and the coal bins of the coal bins to be fed except the target coal feeding bin, generating a switching result, and taking the switching coal bin as the target coal feeding bin to feed coal if the switching result comprises the switching coal bin;
repeatedly determining coal bins to be added and switching and judging until the coal quantity of all the coal bins to be added meets the safety condition;
The step of switching and judging the target coal adding bin and the coal bins of the coal bins to be added except the target coal adding bin to generate a switching result comprises the following steps:
calculating the safe coal quantity, the lowest coal quantity, the coal conveying rate and the consumption rate through a set second formula, and generating a second time period, wherein the second time period is the time consumed by the coal bin from the lowest coal quantity to the safe coal quantity under the coal conveying condition;
Adding the second time period to a first time period consumed by the coal bunker from the actual coal quantity to the lowest coal quantity, and generating a first total time consumed by the coal bunker from the actual coal quantity to the safe coal quantity;
adding the first time periods obtained by the coal bins except the target coal-feeding coal bin according to the current actual coal quantity to preset minimum coal conveying consumption time respectively, and generating a plurality of second total times corresponding to the coal bins except the current coal conveying coal bin;
comparing the first total time with the plurality of second total times, and judging whether at least one second total time is smaller than the first total time;
If yes, determining the minimum second total time, determining a coal bin corresponding to the minimum second total time as a switching coal bin, and generating a switching result comprising the switching coal bin;
If not, generating a switching result of continuous coal conveying.
2. The coal conveying method according to claim 1, wherein determining a coal bunker to be charged comprises:
And determining other coal bins except the coal bin corresponding to the shutdown coal mill and the coal bin meeting the safety condition in all the coal bins as the coal bin to be added.
3. The coal conveying method according to claim 1, further comprising, before conveying coal to a target coal-adding coal bin among the coal-adding coal bins:
Calculating the actual coal quantity, the minimum coal quantity and the consumption rate of each coal bin in the coal bins to be charged through a set first formula, and generating a plurality of first time periods, wherein the first time periods are the time consumed by the coal bins from the actual coal quantity to the minimum coal quantity;
Screening a minimum first time period from the plurality of first time periods;
adding the minimum first time period and the current time to generate minimum coal conveying time;
and determining the coal bunker to be added corresponding to the minimum coal conveying time as a target coal bunker.
4. The coal conveying method according to claim 1, further comprising:
adding the actual coal quantity of the corresponding coal bins of all the off-stream coal mills to the full coal quantity;
and if all the coal bins to be added meet the safe consumption condition, sequentially conveying the coal to all the coal bins to be added so as to ensure that the actual coal quantity of all the coal bins reaches the full coal quantity.
5. The coal conveying method according to claim 1, wherein the safety conditions include that the actual coal amount of the coal bunker is larger than a difference between the safety coal amount and a set safety threshold; the method further comprises the steps of:
judging whether the actual coal quantity of the coal bunker is larger than the difference value between the safe coal quantity and a set safe threshold value;
If yes, determining that the coal bin meets the safety condition;
if not, determining that the coal bin does not accord with the safety condition.
6. The coal conveying method according to claim 4, wherein the safe consumption condition includes that a second time period consumed by a lowest coal amount of all coal bins to be charged reaching a safe coal amount is larger than a calculated third time period, the third time period being a minimum time consumed by the coal bins to be lowered from the safe coal amount to the lowest coal amount;
the method further comprises the steps of:
Judging whether the second time periods of all coal bins to be added are larger than the third time period or not;
if yes, determining that all coal bins to be added meet the safe consumption conditions;
If not, determining that at least one coal bunker to be added does not meet the safe consumption condition.
7. A coal conveying apparatus, the apparatus comprising:
the coal conveying unit is used for conveying coal to a target coal feeding bin in the coal feeding bins;
The judging unit is used for judging the switching of the target coal feeding bin and the coal bins of the coal feeding bin to be fed except the target coal feeding bin, generating a switching result, and taking the switching coal bin as the target coal feeding bin for coal conveying if the switching result comprises the switching coal bin;
the first determining unit is used for repeatedly determining coal bins to be added with coal and switching and judging until the coal quantity of all the coal bins to be added with coal meets the safety condition;
The judging unit is specifically configured to calculate, according to a second formula, a safe coal amount, a minimum coal amount, a coal conveying rate and a consumption rate, and generate a second time period, where the second time period is a time spent by the coal bunker from the minimum coal amount to the safe coal amount under the coal conveying condition; adding the second time period to the first time period consumed by the coal bunker from the actual coal quantity to the lowest coal quantity, and generating a first total time consumed by the coal bunker from the actual coal quantity to the safe coal quantity; adding the first time periods obtained by the coal bins except the target coal-feeding coal bin according to the current actual coal quantity to preset minimum coal conveying consumption time respectively, and generating a plurality of second total times corresponding to the coal bins except the current coal conveying coal bin; comparing the first total time with a plurality of second total times, and judging whether at least one second total time is smaller than the first total time; if yes, determining the minimum second total time, determining a coal bin corresponding to the minimum second total time as a switching coal bin, and generating a switching result comprising the switching coal bin; if not, generating a switching result of continuous coal conveying.
8. A computer readable medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the coal conveying method according to any one of claims 1 to 6.
9. A computer device comprising a memory for storing information including program instructions and a processor for controlling execution of the program instructions, wherein the program instructions when loaded and executed by the processor implement the coal conveying method of any one of claims 1 to 6.
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