阅读说明：本技术 一种燃煤电厂燃煤平衡监测装置及方法 (Coal-fired power plant coal-fired balance monitoring device and method ) 是由 王祝成 梁昊 陈敏 王小华 梅振峰 姚胜 薛晓垒 彭小敏 俞胜捷 刘瑞鹏 赵鹏 于 2021-04-20 设计创作，主要内容包括：本发明涉及一种燃煤电厂燃煤平衡监测装置及方法,包括卸船机、实物称重校验机构、皮带机组件以及给煤机,皮带机组件包括多个皮带机,一个上设置有入厂皮带秤、一个上设置有上仓皮带秤,实物称重校验机构包括煤仓、煤仓秤、给料机,卸船机与煤仓连接,给料机与皮带机组件连接。本发明通过在线实物称重校验机构对入厂皮带秤和上仓皮带秤进行修正,弥补仅依靠动态链码校验的不足而造成皮带秤累计流量的偏差；对每个煤种实物测量获得典型体积时的煤堆平均密度,通过差值法获得煤场各区域特定煤种的实时平均密度,消除仅靠人工模拟法或挖取法测量的煤堆密度的误差,省时省力,为数字化电厂建设打下基础,对于在役燃煤机组,满足现场空间改造要求。(The invention relates to a coal-fired power plant coal-fired balance monitoring device and a coal-fired balance monitoring method, which comprise a ship unloader, a real object weighing and checking mechanism, a belt conveyor assembly and a coal feeder, wherein the belt conveyor assembly comprises a plurality of belt conveyors, one belt conveyor is provided with a factory-entering belt conveyor scale, the other belt conveyor is provided with a bin-loading belt conveyor scale, the real object weighing and checking mechanism comprises a coal bin, a coal bin scale and a feeder, the ship unloader is connected with the coal bin, and the feeder is connected with the belt conveyor assembly. The on-line real object weighing and checking mechanism corrects the belt weigher entering the factory and the belt weigher entering the warehouse, and makes up for the deviation of the accumulated flow of the belt weigher caused by the lack of checking only by the dynamic chain code; the method has the advantages that the average density of the coal pile when the typical volume is obtained by measuring each coal type in real object is obtained, the real-time average density of specific coal types in each region of the coal yard is obtained by a difference method, the error of the coal pile density measured by only a manual simulation method or an excavation method is eliminated, time and labor are saved, the foundation is laid for the construction of a digital power plant, and the requirement of field space transformation is met for an on-service coal-fired unit.)

1. A coal fired power plant coal fired balance monitoring devices which characterized in that: comprises a ship unloader, a real object weighing and checking mechanism, a belt conveyor component and a coal feeder, wherein the ship unloader is connected with the real object weighing and checking mechanism, the real object weighing and checking mechanism is connected with the belt conveyor component, the belt conveyor component is connected with the coal feeder,

the belt conveyor component comprises a plurality of belt conveyors, one of the belt conveyors is provided with a factory entering belt weigher, the other belt conveyor is provided with an upper bin belt weigher,

the material object weighing and checking mechanism comprises a coal bunker, a coal bunker scale used for weighing the coal bunker, and a feeder communicated with the coal bunker, wherein the ship unloader is connected with the coal bunker, and the feeder is connected with the belt conveyor assembly.

2. The coal fired power plant coal fired balance monitoring device of claim 1 wherein: the material object weighing and checking mechanism further comprises a weighing display, and the weighing display is connected with the coal bunker scale.

3. The coal fired power plant coal fired balance monitoring device of claim 1 wherein: the balance monitoring device further comprises a coal plough, the ship unloader passes through the coal plough and is connected with the coal bunker, and meanwhile, the ship unloader passes through the coal plough and is connected with the belt conveyor assembly.

4. The coal fired power plant coal fired balance monitoring device of claim 1 wherein: the belt conveyor assembly comprises a first belt conveyor and a second belt conveyor, the first belt conveyor is connected with the feeding machine, the second belt conveyor is connected with the first belt conveyor, and the factory-entering belt scale is arranged on the second belt conveyor.

5. The coal fired power plant coal fired balance monitoring device of claim 4 wherein: the belt feeder subassembly still include third belt feeder, fourth belt feeder, the third belt feeder with the second belt feeder connect, communicate with the coal yard simultaneously, the fourth belt feeder with the third belt feeder connect, the belt weigher setting of going up the storehouse be in the fourth belt feeder on.

6. The coal fired power plant coal fired balance monitoring device of claim 5 wherein: the belt feeder subassembly still include fifth belt feeder, sixth belt feeder, the fifth belt feeder with the second belt feeder connect, the sixth belt feeder respectively with third belt feeder, fifth belt feeder connect, communicate with the coal yard simultaneously.

7. The coal fired power plant coal fired balance monitoring device of claim 5 wherein: the balance monitoring device further comprises a large block removing machine and a coal crusher, the large block removing machine is arranged between the first belt conveyor and the second belt conveyor, and the coal crusher is arranged between the third belt conveyor and the fourth belt conveyor.

8. The coal fired power plant coal fired balance monitoring device of claim 1 wherein: the ship unloader and the belt conveyor component are respectively provided with two groups, the ship unloader is connected with the coal bunker, and meanwhile, the ship unloader is connected with the belt conveyor component.

9. A coal-fired power plant coal-fired balance monitoring method is characterized in that: the method is realized by adopting the coal-fired power plant coal-fired balance monitoring device of any one of the preceding claims, and a factory-entering belt scale and a warehouse-loading belt scale are verified and corrected by a real object weighing and verifying mechanism, and the method comprises the following steps:

1) feeding coal into the coal bunker, and recording the weight W of the coal bunker₁Feeding coal to the belt conveyor assembly, synchronously performing a contrast test on a factory-entering belt scale and a warehouse-loading belt scale, stopping feeding coal to the belt conveyor assembly after the test is completed, and recording the weight W of the coal warehouse after the coal on the belt conveyor assembly is conveyed completely₂The weight of the coal is W₃The accumulated coal amount of the belt weigher entering the factory/the belt weigher entering the warehouse is Wn, the comparison test is repeated for n times, finally the average value of the test results of the n times is taken as the corrected value k of the belt weigher entering the factory/the belt weigher entering the warehouse,

2) dividing the coal yard into m areas: f₁、F₂、…F_nSetting coal types corresponding to the area of each coal yard: c₁、C₂、…C_nMeasuring the volume V of each coal type₁、V₂、…V_nMeasuring the weight WC of each coal₁、WC₂、…WC_nCalculating the average density of each coal as DC₁、DC₂、…DC_nObtaining a new volume V according to the difference method_nxPost-calculation coal pile real-time average density DC_ny，

3) According to the accumulated flow sigma-W of the belt scale entering the factory_IntoCumulative flow sigma-W of upper-bin belt weigher_{On the upper part}And the coal storage amount sigma WC of the coal yard can realize the real-time monitoring of the fuel balance, and the imbalance rate of the fire coal is required to be not more than 1 percent.

10. The fire coal of claim 9The power plant fire coal balance monitoring method is characterized by comprising the following steps: calculating the average density of coal as DC_nWhile, the coal pile W with the specified weight is entered into the yard every time_nAnd measuring the volume V of the coal pile with the specified weight_nRepeat x times, the average density of each coal pile is:

Technical Field

The invention relates to the field of coal-fired thermal power generating units, in particular to a coal-fired balance monitoring device and method for a coal-fired power plant.

Background

The fuel cost of a large coal-fired power plant accounts for about 70% of the power generation cost of the whole power plant, the fuel management is very important for each coal-fired power plant, and the well-done coal-fired whole-process management is an important basis for accurately accounting the power generation cost in the financial affairs of the power plant. For bidding and surfing of a power plant, the daily fuel consumption and the power generation cost need to be accurately accounted.

At present, coal-fired power plants generally carry out regular coal inventory activities at the bottom of each month, and coal inventory groups comprise personnel in relevant departments such as a fuel part, a production part and a power generation part of the power plants. The general power plant factory entering belt weighers and warehouse entering belt weighers carry out monthly dynamic chain code verification, and the furnace entering belt weighers carry out monthly weight verification; the coal storage amount of the coal yard is calculated by measuring the volume and the density of the stored coal, wherein the volume of the stored coal of the coal yard is completed by a laser scanner, and the density of the fire coal is weighed and calculated by a simulation method or an excavation method. Because the incoming belt weigher and the feeding belt weigher are verified by an analog method, the physical verification is lacked, the belt weigher simulation verification meets the requirements frequently, but the deviation between the coal quantity of the incoming and outgoing coal yards and the coal storage quantity of the power plant coal yard is large. The main reasons for the great imbalance of the fire coal are: on one hand, the belt scale generates tension deviation along with the accumulation of running time, and the tension deviation can not be accurately eliminated through the verification of a dynamic chain code simulation method; on the other hand, the coal density is obtained by weighing and calculating through a simulation method or an excavation method, and the measurement result of the coal density has deviation.

Disclosure of Invention

One object of the invention is to provide a coal-fired power plant coal-fired balance monitoring device.

In order to achieve the purpose, the invention adopts the technical scheme that:

a coal-fired balance monitoring device of a coal-fired power plant comprises a ship unloader, a material object weighing and checking mechanism, a belt conveyor component and a coal feeder, wherein the ship unloader is connected with the material object weighing and checking mechanism, the material object weighing and checking mechanism is connected with the belt conveyor component, the belt conveyor component is connected with the coal feeder,

the belt conveyor component comprises a plurality of belt conveyors, one of the belt conveyors is provided with a factory entering belt weigher, the other belt conveyor is provided with an upper bin belt weigher,

the material object weighing and checking mechanism comprises a coal bunker, a coal bunker scale used for weighing the coal bunker, and a feeder communicated with the coal bunker, wherein the ship unloader is connected with the coal bunker, and the feeder is connected with the belt conveyor assembly.

Preferably, the real object weighing and checking mechanism further comprises a weighing display, and the weighing display is connected with the coal bunker scale.

Preferably, the balance monitoring device further comprises a coal plough, the ship unloader is connected with the coal bunker through the coal plough, and meanwhile, the ship unloader is connected with the belt conveyor assembly through the coal plough.

Preferably, the belt feeder subassembly include first belt feeder, second belt feeder, first belt feeder with the batcher be connected, the second belt feeder with first belt feeder connect, the factory belt balance setting of going into be in the second belt feeder on.

Further preferably, the balance monitoring device further comprises a bulk removing machine, and the bulk removing machine is arranged between the first belt conveyor and the second belt conveyor.

Further preferably, the belt conveyor assembly further comprises a third belt conveyor and a fourth belt conveyor, the third belt conveyor is connected with the second belt conveyor and communicated with a coal yard, the fourth belt conveyor is connected with the third belt conveyor, and the upper bin belt weigher is arranged on the fourth belt conveyor.

Further preferably, the balance monitoring device further comprises a coal crusher, and the coal crusher is arranged between the third belt conveyor and the fourth belt conveyor.

Further preferably, the belt conveyor assembly further comprises a fifth belt conveyor and a sixth belt conveyor, the fifth belt conveyor is connected with the second belt conveyor, and the sixth belt conveyor is respectively connected with the third belt conveyor and the fifth belt conveyor and is simultaneously communicated with the coal yard.

Preferably, the ship unloader and the belt conveyor assembly are respectively provided with two groups, the ship unloader is connected with the coal bunker, and simultaneously the ship unloader is connected with the belt conveyor assembly.

Preferably, the coal bunker is a cylinder or a cone, and the coal bunker scale and the feeder are arranged at the bottom of the coal bunker.

Another object of the present invention is to provide a coal fired power plant coal fired balance monitoring method.

In order to achieve the purpose, the invention adopts the technical scheme that:

a coal-fired power plant coal-fired balance monitoring method is realized by adopting the coal-fired power plant coal-fired balance monitoring device, and a factory entering belt scale and a warehouse loading belt scale are verified and corrected by a real object weighing and verifying mechanism, and the method comprises the following steps:

1) feeding coal into the coal bunker, and recording the weight W of the coal bunker₁Feeding coal to the belt conveyor assembly, synchronously performing a contrast test on a factory-entering belt scale and a warehouse-loading belt scale, stopping feeding coal to the belt conveyor assembly after the test is completed, and recording the weight W of the coal warehouse after the coal on the belt conveyor assembly is conveyed completely₂The weight of the coal is W₃The accumulated coal amount of the belt weigher entering the factory/the belt weigher entering the warehouse is Wn, the comparison test is repeated for n times, finally the average value of the test results of the n times is taken as the corrected value k of the belt weigher entering the factory/the belt weigher entering the warehouse,

，

，

2) dividing the coal yard into m areas: f₁、F₂、…F_nSetting coal types corresponding to the area of each coal yard: c₁、C₂、…C_nMeasuring the volume V of each coal type₁、V₂、…V_nMeasuring the weight WC of each coal₁、WC₂、…WC_nCalculating the average density of each coal as DC₁、DC₂、…DC_nObtaining a new volume V according to the difference method_nxPost-calculation coal pile real-time average density DC_ny，

3) According to the accumulated flow sigma-W of the belt scale entering the factory_IntoCumulative flow sigma-W of upper-bin belt weigher_{On the upper part}And the coal storage amount sigma WC of the coal yard can realize the real-time monitoring of the fuel balance, and the unbalanced rate of the fire coal is required to be not more than 1 percent, namely:

。

preferably, the average density of the coal species is calculated to be DC_nWhile, the coal pile W with the specified weight is entered into the yard every time_nAnd measuring the volume V of the coal pile with the specified weight_nRepeat x times, the average density of each coal pile is:

。

due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the on-line real object weighing and checking mechanism corrects the belt weigher entering the factory and the belt weigher entering the warehouse, and makes up for the deviation of the accumulated flow of the belt weigher caused by the lack of checking only by the dynamic chain code; the method has the advantages that the average density of the coal pile when the typical volume is obtained by measuring each coal type in real objects, the real-time average density of specific coal types in each region of the coal yard is obtained by a difference method, the error of the coal pile density measured by only a manual simulation method or an excavation method is eliminated, time and labor are saved, the foundation is laid for the construction of a digital power plant, and the site space can meet the reconstruction requirement for an in-service coal-fired unit.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

In the above drawings:

1. a ship; 2. a ship unloader; 30. a coal bunker; 31. a coal bunker scale; 32. a weighing display; 33. a feeder; 40. entering a factory belt scale; 41. a belt weigher is arranged on the bin; 5. removing large blocks; 6. a coal crusher; 7. a coal feeder; 8. a coal plough; 90. 1, a coal yard; 91. and (4) a coal yard 2.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The coal-fired power plant coal-fired balance monitoring device shown in fig. 1 comprises a ship unloader 2, a material object weighing and verifying mechanism, a belt conveyor assembly, a lump removing machine 5, a coal crusher 6, a coal feeder 7 and the like. The steamship 1 is connected with ship unloader 2, and ship unloader 2 is connected with the verification mechanism that weighs in kind, and the verification mechanism that weighs in kind is connected with the belt feeder subassembly, and the belt feeder subassembly is connected with coal feeder 7.

In this embodiment: the material object weighing and checking mechanism comprises a coal bunker 30, a coal bunker scale 31 for weighing the coal bunker 30, a weighing display 32 for displaying the weighing weight of the coal bunker scale 31 and a feeder 33 communicated with the coal bunker 30. Wherein: the coal bunker 30 is generally designed into a cylinder or a cone, the coal bunker scale 31 and the feeder 33 are arranged at the bottom of the coal bunker 30, and the weighing display 32 is connected with the coal bunker scale 31; the ship unloader 2 is connected with the coal bunker 30, and the feeder 33 is connected with the belt conveyor assembly. In this embodiment: the ship unloader 2 is connected with the coal bunker 30 through the coal plough 8 to cut the fire coal to the coal bunker 20, and meanwhile, the ship unloader 2 can also be directly connected with the belt conveyor assembly through the coal plough 8 to cut the fire coal to the belt conveyor assembly.

In this embodiment: the belt conveyor assembly comprises a plurality of belt conveyors, wherein one of the belt conveyors is provided with a factory entering belt weigher 40, and the other belt conveyor is provided with an upper bin belt weigher 41. The method specifically comprises the following steps: a first belt conveyor 1A/1B, a second belt conveyor 2A/2B, a third belt conveyor 5A/5B, a fourth belt conveyor 6A/6B, a fifth belt conveyor 3A/3B, a sixth belt conveyor 4A/4B, a seventh belt conveyor 7A/7B and an eighth belt conveyor 8A/8B, wherein the first belt conveyor 1A/1B is connected with a feeding machine 33 and a ship unloader 2 at the same time, a bulk removing machine 5 is connected with the first belt conveyor 1A/1B, the second belt conveyor 2A/2B is connected with the bulk removing machine 5, the fifth belt conveyor 3A/3B is connected with the second belt conveyor 2A/2B, the sixth belt conveyor 4A/4B is connected with the fifth belt conveyor 3A/3B and a coal yard at the same time, the third belt conveyor 5A/5B is connected with the sixth belt conveyor 4A/4B and the coal yard at the same time, the coal crusher 6 is connected with the third belt conveyor 5A/5B, the fourth belt conveyor 6A/6B is connected with the coal crusher 6, the seventh belt conveyor 7A/7B is connected with the fourth belt conveyor 6A/6B, the eighth belt conveyor 8A/8B is connected with the seventh belt conveyor 7A/7B, and the coal feeder 7 is connected with the eighth belt conveyor 8A/8B. The factory entering belt weigher 40 is arranged on the second belt conveyor 2A/2B, and the upper bin belt weigher 41 is arranged on the fourth belt conveyor 6A/6B.

In this embodiment: the ship unloader 2 and the belt conveyor assembly are respectively provided with two groups, the factory-entering belt weigher 40 and the upper bin belt weigher 41 are verified and corrected through the material object weighing and verifying mechanism, the factory-entering belt weigher 40 and the upper bin belt weigher 41 on the two groups of lines can be verified in turn through the two groups of lines, and normal factory-entering coal unloading and upper bin coal feeding operation are not influenced.

When the factory entering belt weigher 40 and the warehouse entering belt weigher 41 need to be subjected to physical verification: firstly, carrying out dynamic chain code verification on a factory entering belt weigher 40 and a warehouse entering belt weigher 41, and verifying and checking an accumulation device of the belt weighers to ensure that instantaneous values and accumulated values of the belt weighers are displayed normally; and then a real object weighing and checking mechanism is utilized to sequentially carry out real object weighing and checking on the factory-entering belt scale 40 and the warehouse-loading belt scale 41, during the test, the large blocks are collected and removed and the weight is counted, the weight of the large blocks is subtracted from the weighing value of the real object weighing and checking mechanism to be used as a fire coal weight reference value, the display value of the belt scales is sequentially corrected, when the warehouse-loading belt scale 41 is checked, attention needs to be paid to the fact that the sixth belt conveyor 4A/4B is switched to the third belt conveyor 5A/5B, fire coal is prevented from being conveyed to a coal yard, the counting of the fire coal weight is influenced, each belt scale carries out repeated tests, and finally the belt scales are corrected according to the average value (the ratio of the fire coal weight reference.

When the density needs to be calculated for different coal types, different coal types are stacked in different areas of the coal yard (such as F11, F12, F13 and F14 in the coal yard 1 and F21, F22, F23 and F24 in the coal yard 2) from an empty place in a certain area of the coal yard, and if the coal types purchased by the power plant are too much, similar coal types can be selected to be stacked in the same place. The coal-fired bulk density can be calculated by the coal amount of a coal inlet field and the coal storage volume of each stack of the coal pile to obtain the average density of the coal pile with 10 working conditions and typical volumes of different coal types, the relationship among the coal pile (coal type), the volume of the coal pile and the average density of the coal pile is established, and the average density of the coal pile under different volumes is obtained according to a difference method. And realizing real-time balance data on-line display according to the accumulated flow of the factory entering belt weigher 40 and the upper bin belt weigher 41 of the coal yard and the coal storage amount of the coal yard, wherein the imbalance rate deviation of the coal burning amount is not more than 1%.

The detailed process of the device is illustrated by taking a supercritical 660MW unit of a certain plant as an example:

(1) firstly, coal is fed into a coal bunker 30 by operating a coal plough 8, when the material level reaches 100%, the coal feeding is stopped, the weight of the coal bunker is recorded as W1, then a feeding machine 33 at the lower part of the coal bunker 30 is started to carry out a belt scale comparison test, a sixth belt conveyor 4A is switched to a third belt conveyor 5A, the factory-entering belt scale 40 and an upper bin belt scale 41 are synchronously subjected to the comparison test, after the test is finished, the feeding machine 33 at the lower part of the coal bunker 30 is stopped, the coal on the first belt conveyor 1A, the second belt conveyor 2A and the fourth belt conveyor 6A is checked to be completely emptied, the weight of the coal bunker 30 is recorded as W2, the large block weight in the coal is W3, the accumulated coal amount of the factory-entering belt scale 40/upper bin belt scale 41 of the second belt conveyor 2A and the fourth belt conveyor 6A is W2A/W6A, the test is repeated for 3 times, and finally, the average value of the test results of 3 times. For example, the modified calculation formula for the factory belt scale 40 on the second belt conveyor 2A is as follows:

in the formula:

、、respectively representing the weight t/h of the fed coal bunker of the first test, the fed coal bunker of the second test and the fed coal bunker of the third test;

、、respectively representing the weight t/h of the fed coal bunker of the first test, the fed coal bunker of the second test and the fed coal bunker of the third test;

、、respectively representing the weights t/h after the first test coal bunker test, the second test coal bunker test and the third test coal bunker test are finished;

、、respectively representing the weight of the large blocks removed from the first test coal, the second test coal and the third test coal, and t/h;

、、respectively indicating the accumulated weight of the fire coal entering the factory belt scale 40 for the first test, the second test and the third test, and t/h;

、、respectively representing the accumulated coal weight correction coefficients of the first test, the second test and the third test which enter the factory belt scale 40;

average correction factor representing the accumulated weight entered into the factory belt scale 40.

The correction coefficients of the rest of the factory-entering belt weighers 40 and the warehouse-on belt weighers 41 can be obtained by the same steps, and are not described in detail herein.

(2) The coal yard 1 is divided into 4 areas: f11, F12, F13 and F14, the coal yard 2 is divided into four areas F21, F22, F23 and F24, and 8 coal types are daily used by the power plant: c1, C2, C3, C4, C5, C6, C7, and C8 correspond to 8 areas of the 2 coal yards, respectively, the volumes of the 8 coal piles measured by a laser scanner installed in the coal yard are V1, V2, V3, V4, V5, V6, V7, and V8, the weights of the coal piles are WC1, WC2, WC3, WC4, WC5, WC6, WC7, and WC8, respectively, and the corresponding average densities are DC1, DC2, DC3, DC4, DC5, DC6, DC7, and DC8, respectively. Taking the coal type C1 as an example, the process of calculating the average density is as follows: firstly, cleaning a coal yard area F11, then, starting to enter a yard for stacking, wherein the area F11 can stack 4 ten thousand tons of coal, the coal pile is conical, the coal pile volume is measured by a laser instrument every 4000 tons of coal entering the yard until the coal pile volume is 4 ten thousand tons, and the coal pile volume is measured 10 times in total, namely: v11, V12, V13, V14, V15, V16, V17, V18, V19, V110, 10 average densities were calculated by weight and volume, namely: DC11, DC12, DC12, DC13, DC14, DC15, DC16, DC17, DC18, DC19, DC 110:

；；；

；；；

；；；。

according to the difference method, the coal bulk average density DC1y is obtained after a new volume V1x is obtained by a laser scanner. The average density of other coals can be obtained by the same method as described above, and the details thereof are not repeated herein.

(3) After the 2 steps are completed, the fuel balance real-time monitoring can be realized according to the accumulated flow sigma W2 of the incoming belt scale, the accumulated flow sigma W6 of the coal on the upper bunker and the coal storage quantity sigma WC of the coal yard, and the imbalance rate of the fire coal is required to be not more than 1 percent, namely

。

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.