CN112393228A

CN112393228A - RB (reverse bearing) jumping and grinding control device and method for octagonal tangential coal-fired boiler

Info

Publication number: CN112393228A
Application number: CN202011378224.8A
Authority: CN
Inventors: 邢智炜; 赖联琨; 尤默; 高明帅; 刘磊; 高爱国; 尚勇; 杨振勇; 李卫华
Original assignee: State Grid Corp of China SGCC; North China Electric Power Research Institute Co Ltd
Current assignee: State Grid Corp of China SGCC; North China Electric Power Research Institute Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-02-23

Abstract

The embodiment of the specification provides an RB jump grinding control device and method for an octagonal tangential circle coal-fired boiler. The device comprises a trigger, and a trigger output RB tripping coal mill signal responding to a trigger signal; the judging module is connected with the trigger and the octagonal tangential coal-fired boiler and used for responding to an RB tripping coal mill signal output by the trigger and judging the number of coal mills currently running in the octagonal tangential coal-fired boiler; the control cabinet is connected with the judging module and the octagonal tangential circle coal-fired boiler and is used for executing a corresponding jumping and grinding circuit according to a judging result output by the judging module; the coal mill trip control system comprises a coal mill, a trip grinding circuit and a trip grinding circuit, wherein the number of different coal mills corresponds to different trip grinding circuits, and the trip grinding circuits are used for sending trip instructions to the coal mills. By utilizing the embodiment of the specification, the heat load of the boiler can be quickly and safely reduced in the RB process, and the stability and the safety of the unit in the RB process can be better guaranteed.

Description

RB (reverse bearing) jumping and grinding control device and method for octagonal tangential coal-fired boiler

Technical Field

The application relates to the field of power plant unit control, in particular to an RB jump grinding control device and method for an octagonal tangential circle coal-fired boiler.

Background

The auxiliary machine fault load reduction (Runback, RB) is that when a unit has a fault trip of part of main auxiliary machines and the maximum theoretical output of the unit is lower than the current actual load, the unit coordination control system quickly reduces the unit load to the response output which can be actually achieved by all auxiliary machines, and can control unit parameters to keep the unit running continuously within an allowable range. For boiler systems, due to the large combustion thermal inertia, it becomes important to be able to quickly trip the mill group after RB triggering to reduce the boiler thermal load, match the drop in electrical power, and maintain an appropriate boiler firing rate.

At present, the arrangement of boiler burners is generally designed into a front-back wall hedging and four-corner circle cutting mode, coal mills of the boiler burners are arranged in an upper-layer and lower-layer mode, and after RB is triggered, the stable combustion of a hearth in the RB process is guaranteed by quickly jumping an upper-layer coal mill to reserve a lower-layer coal mill. For the tower furnace adopting the octagonal tangential firing mode, the flame deflection of the boiler is easily caused, the wall temperature is over-temperature and the water circulation fault is caused, and therefore the safety of the unit in the RB process cannot be guaranteed.

Therefore, there is a need for a solution to the above technical problems.

Disclosure of Invention

The embodiment of the specification provides an RB jump grinding control device and method for an octagonal tangential circle coal-fired boiler, which can quickly and safely reduce the heat load of the boiler in the RB process and better ensure the stability and safety of a unit in the RB process.

The RB jump grinding control device and method for the coal-fired boiler with the octagonal tangential circle are realized in the following mode.

An eight angle tangent circle coal fired boiler's RB jumps and grinds controlling means, includes: the trigger responds to the trigger signal to output an RB tripping coal mill signal; the judging module is connected with the trigger and the octagonal tangential coal-fired boiler and used for responding to an RB tripping coal mill signal output by the trigger and judging the number of coal mills currently running in the octagonal tangential coal-fired boiler; the control cabinet is connected with the judging module and the octagonal tangential circle coal-fired boiler and is used for executing a corresponding jumping and grinding circuit according to a judging result output by the judging module; the coal mill trip control system comprises a coal mill, a trip grinding circuit and a trip grinding circuit, wherein the number of different coal mills corresponds to different trip grinding circuits, and the trip grinding circuits are used for sending trip instructions to the coal mills.

An RB jump grinding control method of an octagonal tangential circle coal-fired boiler comprises the following steps: receiving RB tripping coal mill signals; judging the number of the coal mills in current operation; executing corresponding jumping mill circuits according to the number of the currently operated coal mills; the coal mill trip control system comprises a coal mill, a trip grinding circuit and a trip grinding circuit, wherein the number of different coal mills corresponds to different trip grinding circuits, and the trip grinding circuits are used for sending trip instructions to the coal mills.

The specification provides an RB jump grinding control device and method for an octagonal tangential circle coal-fired boiler. In some embodiments, for a boiler adopting an octagonal tangential firing mode, an RB tripping coal mill signal is received, the number of the currently-operated coal mills is judged, and then a corresponding tripping circuit is executed according to the number of the currently-operated coal mills, so that the safety and stability of the unit can be guaranteed when an auxiliary machine fails, and the load is reduced. Through providing perfect reasonable jump-grinding logic circuit to the RB process, can ensure the reduction boiler heat load of RB in-process quick safety, realize that the stability of RB in-process flame center is not burnt partially, ensure the stable control of steam temperature. When different jumping mill logic circuits are executed, the coal mill operation in each corner mill group is guaranteed, opposite jumping adjacent corners are reserved, stable combustion after RB triggering can be better guaranteed, and stability and safety of the unit in the RB process are better guaranteed. By adopting the implementation scheme provided by the specification, the heat load of the boiler can be quickly and safely reduced in the RB process, and the stability and the safety of the unit in the RB process can be better ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the specification, are incorporated in and constitute a part of this specification, and are not intended to limit the specification. In the drawings:

FIG. 1 is a schematic structural diagram of an RB jump grinding control device of an octagonal tangential circle coal-fired boiler provided by the specification;

FIG. 2 is a schematic view of an octagonal tangential coal pulverizer configuration provided herein;

FIG. 3 is a schematic flow chart diagram of one embodiment of an RB jump grinding control method for an octagonal tangential firing coal boiler provided by the present specification;

fig. 4 is a block diagram of a hardware structure of an embodiment of an RB trip and grinding control server of an octagonal tangential circle coal-fired boiler provided by the present specification.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only a part of the embodiments in the present specification, and not all of the embodiments. All other embodiments that can be obtained by a person skilled in the art on the basis of one or more embodiments of the present description without inventive step shall fall within the scope of protection of the embodiments of the present description.

The main purpose of RB logic design is to maintain the allowable boiler output when the main auxiliary machine of the unit fails, and to ensure that the unit is quickly and automatically reduced in load, the main regulating system is ensured to work normally, and the main parameters of the unit are maintained within the allowable range. For RB function design of the unit, the unit mainly comprises a coal mill RB, a feeding/induced draft fan RB, a primary fan RB and a water feeding pump RB. In general, the RB process needs to ensure that the action process is completely and automatically completed without manual intervention, and the parameter fluctuation range does not endanger the safety of the unit and does not cause the protective tripping of the unit. However, in the RB process of each power plant, the control effect differences of the main parameters such as steam temperature, steam pressure, feedwater flow, negative pressure of the furnace chamber are large, and the non-stop of the RB failed unit may be caused.

For the combustion mode of octagonal circle cutting, the coal mills are arranged according to the circle cutting of the corners, and the powder pipes of each coal mill are arranged from top to bottom.

From the actual operation condition of the boiler, the parameters of coal types for combustion, air distribution in the boiler, coal powder fineness and the like are different, and for the RB process, tangential firing with coal mills operating at four corners is finally reserved, or opposite firing modes at two corners are reserved, so that difference can exist. Therefore, in order to adapt to the change of the combustion characteristics of the boiler, the embodiment of the specification provides the RB jump grinding control device of the octagonal tangential coal-fired boiler, and the operation mode combination of various coal mills can be comprehensively considered.

In the embodiment of the specification, while the thermal load of the boiler is rapidly reduced, the flame center of a hearth is not deflected and the wall temperature of the boiler is in a controllable range, and the jumping grinding is performed according to a preset rule by judging the number of the coal mills in operation and the number of the coal mills in diagonal operation.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an RB jumping and grinding control device of an octagonal tangential coal-fired boiler provided in the present specification. The RB jump grinding control device of the octagonal tangential coal-fired boiler can comprise a trigger, a judgment module and a control cabinet. The trigger can respond to the trigger signal to output an RB tripping coal mill signal; the judging module is connected with the trigger and the octagonal tangential coal-fired boiler and can be used for responding to an RB tripping coal mill signal output by the trigger and judging the number of coal mills currently running in the octagonal tangential coal-fired boiler; the control cabinet is connected with the judging module and the octagonal tangential circle coal-fired boiler and can be used for executing a corresponding jump grinding circuit according to a judging result output by the judging module; the coal mill trip control system comprises a coal mill, a trip grinding circuit and a trip grinding circuit, wherein the number of different coal mills corresponds to different trip grinding circuits, and the trip grinding circuits are used for sending trip instructions to the coal mills.

In some embodiments, the operation of the trigger may be understood as a trigger signal. The trigger may be a front button of the operating panel. The operator can operate the trigger through the front button of the operation panel, and can also operate the trigger through the control on the operation control system. Wherein controls on the control system may be pre-associated with the pre-disc buttons.

In some embodiments, after operating the trigger, the trigger may output an RB trip coal pulverizer signal. The RB trip coal mill signal can be used for indicating that a unit auxiliary machine breaks down, and the RB trip coal mill control device of the octagonal tangential coal-fired boiler can trigger the RB function according to the number of the currently-operated coal mills after receiving the RB trip coal mill signal, so that RB trip coal mill logic is executed. The RB jump grinding logic can be realized through an RB jump grinding circuit, and the jump grinding circuit can be used for sending a tripping instruction to the coal mill.

In some embodiments, the RB jumping and grinding control device of the coal-fired boiler with an octagonal tangential circle may further include a selection module, which selects a tangential circle configuration mode in response to a first trigger signal, and selects a diagonal hedging configuration mode in response to a second trigger signal. The circle-cutting configuration may also be referred to as an octagonal circle-cutting coal mill configuration, as shown in fig. 2, fig. 2 is a schematic diagram of an octagonal circle-cutting coal mill configuration provided in this specification, in which each coal mill is disposed at one corner, and each floor from top to bottom corresponds to one corner, and the operation of one coal mill simultaneously cuts off each floor burner at a single corner. The opposite-angle opposite-impact configuration mode can also be called an opposite-impact mode, coal mills in the opposite-impact mode are arranged from top to bottom in a layered mode, and after RB is triggered, an upper-layer coal mill is jumped first, and a lower-layer coal mill is reserved.

In some embodiments, in order to ensure the stability of the combustion center, the control cabinet may include: the first jumping and grinding unit is used for executing a first jumping and grinding logic circuit when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 8; the second jumping and grinding unit is used for executing a second jumping and grinding logic circuit when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 7; the third jumping and grinding unit is used for executing a third jumping and grinding logic circuit when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 6; and the fourth jumping and grinding unit is used for executing a fourth jumping and grinding logic circuit when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 5.

As shown in fig. 2, in some embodiments, eight coal mills can be included in the octagonal tangential coal-fired boiler, and the eight coal mills are sequentially labeled as coal mill No. 1, coal mill No. 2, coal mill No. 3, coal mill No. 4, coal mill No. 5, coal mill No. 6, coal mill No. 7, and coal mill No. 8. In some embodiments, coal mills # 1 and # 2 can be defined as a # 1 corner mill group, coal mills # 3 and # 4 as a # 2 corner mill group, coal mills # 5 and # 6 as a # 3 corner mill group, and coal mills # 7 and # 8 as a # 4 corner mill group. In some embodiments, coal mills # 3 and # 7 may be defined as micro-oil mills. When the micro oil mill is started, the micro oil burner is arranged at the outlet of the coal mill, so that the ignition of pulverized coal and stable combustion can be facilitated, and when the combustion at the outlet of the coal mill is unstable, the operation of the micro oil burner can be stabilized to prevent flame from losing. For a unit, one to two mills are generally provided with micro oil burners, and when the unit is started, the micro oil mills are started first, and then other coal mills are started. Of course, the above-mentioned number of the coal mill, the definition of the angle mill group and the definition of the micro oil mill are only exemplary illustrations, and other modifications are possible for those skilled in the art in light of the technical spirit of the embodiments of the present disclosure, but all that can be achieved by the coal mill, the angle mill group and the micro oil mill are covered by the protection scope of the embodiments of the present disclosure.

In some embodiments, the first skimming logic circuit may include: and the first trigger circuit can be used for sending a tripping command to the No. 2 coal mill.

In some embodiments, the second skipping logic circuit may include: the judgment circuit can be used for judging the operation condition of each coal mill in the octagonal tangential coal-fired boiler; the first exclusive-or gate circuit is connected with the judging circuit, and can send a tripping instruction to the No. 1 coal mill and the No. 5 coal mill when the No. 2 coal mill, the No. 3 coal mill, the No. 4 coal mill, the No. 6 coal mill, the No. 7 coal mill and the No. 8 coal mill run, one coal mill of the No. 1 coal mill and the No. 5 coal mill runs and the other coal mill stops; the second exclusive-or gate circuit is connected with the judging circuit, and can send a tripping instruction to the No. 2 coal mill and the No. 6 coal mill when the No. 1 coal mill, the No. 3 coal mill, the No. 4 coal mill, the No. 5 coal mill, the No. 7 coal mill and the No. 8 coal mill run, one coal mill of the No. 2 coal mill and the No. 6 coal mill runs and the other coal mill stops; the third differential or gate circuit is connected with the judging circuit, and can send a tripping instruction to the No. 4 coal mill and the No. 8 coal mill when the No. 1 coal mill, the No. 2 coal mill, the No. 3 coal mill, the No. 5 coal mill, the No. 6 coal mill and the No. 7 coal mill run, one coal mill runs and the other coal mill stops; the first trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 8 coal mill when the No. 1, the No. 2, the No. 4, the No. 5, the No. 6, the No. 7 and the No. 8 coal mills run and the No. 3 coal mill stops; and the second trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 4 coal mill when the No. 1, 2, 3, 4, 5, 6 and 8 coal mills run and the No. 7 coal mill stops.

In some embodiments, the third skimming logic circuit may include: the judging circuit can be used for judging the operation condition of the coal mills in each angle mill group in the octagonal tangential coal-fired boiler; the first trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 2 coal mill when two coal mills in the No. 1 and No. 2 angle mill groups are all operated and one coal mill in the No. 3 and No. 4 angle mill groups is operated; the second trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 2 coal mill when two coal mills in the No. 1 and No. 3 angle mill groups are all operated, one coal mill in the No. 2 and No. 4 angle mill groups is operated, and the jumping mill mode is a circle cutting configuration mode; the third trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 3 coal mills and the No. 4 coal mills when the two coal mills in the No. 1 and No. 3 angle mill groups are all operated, one coal mill in the No. 2 and No. 4 angle mill groups is operated, and the jumping mill mode is a diagonal opposite impact configuration mode; the fourth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 2 coal mill when two coal mills in the No. 1 and No. 4 angle mill groups are all operated and one coal mill in the No. 2 and No. 3 angle mill groups is operated; the fifth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 4 coal mill when two coal mills in the No. 2 and No. 3 angle mill groups are all operated and one coal mill in the No. 1 and No. 4 angle mill groups is operated; the sixth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 4 coal mill when two coal mills in the No. 2 and No. 4 angle mill groups are all operated, one coal mill in the No. 1 and No. 3 angle mill groups is operated, and the jumping mill mode is a circle cutting configuration mode; the seventh trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 1 coal mill and the No. 2 coal mill when two coal mills in the No. 2 and No. 4 angle mill groups are all operated, one coal mill in the No. 1 and No. 3 angle mill groups is operated, and the jumping mill mode is a diagonal opposite impact configuration mode; the eighth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 6 coal mill when two coal mills in the No. 3 and No. 4 angle mill groups are all operated and one coal mill in the No. 1 and No. 2 angle mill groups is operated; the ninth trigger circuit is connected with the judging circuit and can send a tripping instruction to the No. 6 coal mill when the two coal mills in the No. 2, 3 and 4 angle mill groups are all operated; the tenth trigger circuit is connected with the judging circuit and can send a tripping instruction to the No. 8 coal mill when the two coal mills in the No. 1, 3 and 4 angle mill groups are all operated; the eleventh trigger circuit is connected with the judging circuit and can send a tripping instruction to the No. 2 coal mill when two coal mills in the No. 1, No. 2 and No. 4 angle mill groups are all operated; and the twelfth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 4 coal mill when the two coal mills in the No. 1, 2 and 3 angle mill groups are all operated.

In some embodiments, the fourth skimming logic circuit may include: the judging circuit can be used for judging the operation condition of the coal mills in each angle mill group in the octagonal tangential coal-fired boiler; the first trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 2 coal mill when two coal mills in the No. 1 angle mill group are all operated and one coal mill in each of the No. 2, 3 and 4 angle mill groups is operated; the second trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 4 coal mill when two coal mills in the No. 2 angle mill group are all operated and one coal mill in each of the No. 1, 3 and 4 angle mill groups is operated; the third trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 6 coal mill when two coal mills in the No. 3 angle mill group are all operated and one coal mill in the No. 1, No. 2 and No. 4 angle mill group is operated; the fourth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 8 coal mill when two coal mills in the No. 4 angle mill group are all operated and one coal mill in each of the No. 1, 2 and 3 angle mill groups is operated; the fifth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 6 coal mill when no coal mill in the No. 1 angle mill group operates and two coal mills in the No. 3 angle mill group operate completely; the sixth trigger circuit is connected with the judging circuit, and can send a tripping instruction to No. 5 and No. 6 coal mills when no coal mill in the No. 1 angle mill group operates and one coal mill in the No. 3 angle mill group operates; the seventh trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 8 coal mill when no coal mill in the No. 2 angle mill group operates and two coal mills in the No. 4 angle mill group operate completely; the eighth trigger circuit is connected with the judging circuit, and can send a tripping instruction to No. 7 and No. 8 coal mills when no coal mill runs in the No. 2 angle mill group and one coal mill runs in the No. 4 angle mill group; the ninth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 2 coal mill when no coal mill in the No. 3 angle mill group operates and two coal mills in the No. 1 angle mill group operate completely; the tenth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 1 coal mills and the No. 2 coal mills when no coal mill in the No. 3 angle mill group operates and one coal mill in the No. 1 angle mill group operates; the eleventh trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 4 coal mill when no coal mill in the No. 4 angle mill group operates and two coal mills in the No. 2 angle mill group operate completely; and the twelfth trigger circuit is connected with the judging circuit, and can send a tripping instruction to the No. 3 coal mills and the No. 4 coal mills when no coal mill runs in the No. 4 angle mill group and one coal mill runs in the No. 2 angle mill group.

In some embodiments, the apparatus may further comprise: and the delay unit is used for controlling the delay time of the jumping grinding of different coal mills when the logic circuit of the jumping grinding is executed.

Of course, the grinding logic circuit is not limited to the above examples, and other modifications may be made by those skilled in the art within the spirit of the embodiments of the present disclosure, and the functions and effects achieved by the grinding logic circuit are all covered by the scope of the embodiments of the present disclosure.

According to the technical scheme provided by the embodiment of the specification, aiming at the boiler adopting the octagonal tangential circle combustion mode, a complete and reasonable jump grinding logic circuit is provided for the RB process, the heat load of the boiler can be reduced rapidly and safely in the RB process, the stable non-biased burning of the flame center in the RB process is realized, and the stable control of the steam temperature is guaranteed. When different jumping mill logic circuits are executed, the coal mill operation in each corner mill group is guaranteed, opposite jumping adjacent corners are reserved, stable combustion after RB triggering can be better guaranteed, and stability and safety of the unit in the RB process are better guaranteed.

Referring to fig. 3, fig. 3 is a schematic flow chart of an embodiment of an RB skip grinding control method for an octagonal tangential circle coal-fired boiler provided in the present specification. Although the present specification provides the method steps or apparatus structures as shown in the following examples or figures, more or less steps or modules may be included in the method or apparatus structures based on conventional or non-inventive efforts.

One embodiment provided by the present specification can be applied to a client, a server, and the like. The client may include a terminal device, such as a smart phone, a tablet computer, and the like. The server may include a single computer device, or may include a server cluster formed by a plurality of servers, or a server structure of a distributed system, and the like.

It should be noted that the following description of the embodiments does not limit the technical solutions in other extensible application scenarios based on the present specification. In a specific embodiment, as shown in fig. 3, the present specification provides an RB skip grinding control method for an octagonal tangential circle coal-fired boiler, which may include the following steps.

S0: receiving RB tripping coal mill signals;

s2: judging the number of the coal mills in current operation;

s4: executing corresponding jumping mill circuits according to the number of the currently operated coal mills; the coal mill trip control system comprises a coal mill, a trip grinding circuit and a trip grinding circuit, wherein the number of different coal mills corresponds to different trip grinding circuits, and the trip grinding circuits are used for sending trip instructions to the coal mills.

In some embodiments, the reception of the RB trip coal mill signal may indicate that the unit auxiliary machine has a fault, that is, the reception of the RB trip coal mill signal may trigger the RB function, and then execute the RB trip grinding logic. RB jumps and grinds logic and can realize through RB jumps and grinds the circuit, jumps and grinds the circuit and can be used for sending the tripping operation instruction to the coal pulverizer to control the tripping operation of coal pulverizer, ensure the stable burning after RB triggers.

In some embodiments, after the RB function is triggered, the corresponding coal mill tripping circuit may be executed to control the corresponding coal mill to trip according to the number of currently operating coal mills in the octagonal tangential coal-fired boiler. Wherein, different coal pulverizer quantity corresponds different jump grinding circuit.

In some embodiments, before executing the corresponding skip-grinding circuit according to the number of the currently operating coal mills, it may be determined whether the current skip-grinding mode is a tangential configuration mode or a diagonal hedging configuration mode, and then the corresponding skip-grinding circuit is executed according to the selected skip-grinding mode. Therefore, different RB jump grinding circuits can be selected according to different combustion characteristics, stable combustion after RB triggering can be better guaranteed, and stability and safety of the unit in the RB process can be better guaranteed.

In some embodiments, eight coal mills can be included in the octagonal tangential coal-fired boiler, and the eight coal mills are sequentially marked as coal mill No. 1, coal mill No. 2, coal mill No. 3, coal mill No. 4, coal mill No. 5, coal mill No. 6, coal mill No. 7, and coal mill No. 8. In some embodiments, coal mills # 1 and # 2 can be defined as a # 1 corner mill group, coal mills # 3 and # 4 as a # 2 corner mill group, coal mills # 5 and # 6 as a # 3 corner mill group, and coal mills # 7 and # 8 as a # 4 corner mill group. In some embodiments, coal mills # 3 and # 7 may be defined as micro-oil mills.

The following description is given by way of example of eight coal mills included in the octagonal tangential coal-fired boiler, and it is to be understood that other embodiments of the present disclosure are not limited thereto.

In some implementation scenarios, when the number of currently operating coal mills in the octagonal tangential coal-fired boiler is 8, the number 2 coal mill can be tripped fixedly.

In some implementation scenarios, when the number of currently operated coal mills in the octagonal tangential coal-fired boiler is 7, and the No. 1 and No. 5 coal mills are operated in an exclusive-or mode, the No. 1 and No. 5 coal mills can be tripped; when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 7, and the No. 2 and No. 6 coal mills are operated in an exclusive or mode, the No. 2 and No. 6 coal mills can be tripped; when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 7, and the No. 4 and No. 8 coal mills are operated in an exclusive OR mode, the No. 4 and No. 8 coal mills can be tripped.

In some implementation scenarios, when the number of currently operating coal mills in the octagonal tangential coal-fired boiler is 7 and the stopped coal mill is a micro oil mill, another micro oil mill can be stopped to start micro oil stable combustion. For example, when the number of currently operating coal mills in an octagonal tangential coal fired boiler is 7 and the coal mill # 3 is shut down, the coal mill # 8 may be tripped. For another example, when the number of currently operating coal mills in the octagonal tangential coal-fired boiler is 7 and the No. 7 coal mill is shut down, the No. 4 coal mill may be tripped.

In some implementation scenarios, when the number of currently operating coal mills in the octagonal tangential coal-fired boiler is 6, the situation that two coal mills in 2 corner mill groups are all operated and one coal mill in each of the other 2 corner mill groups is operated, and the situation that two coal mills in 3 corner mill groups are all operated and no coal mill is operated in the other 1 corner mill group can be divided.

Specifically, the condition that two coal mills in 2 corner mill groups are operated completely and one coal mill in each of the other 2 corner mill groups is operated at least comprises one of the following conditions: two coal mills in No. 1 and No. 2 angle grinding groups operate completely, one coal mill in No. 3 and No. 4 angle grinding groups operates, and at the moment, the No. 2 coal mill can be tripped; or two coal mills in the No. 1 and No. 3 angle grinding groups operate completely, one coal mill in each of the No. 2 and No. 4 angle grinding groups operates, the jumping grinding mode is a circle cutting configuration mode, and at the moment, the No. 2 coal mill can be tripped; or two coal mills in the No. 1 and No. 3 angle grinding groups operate completely, one coal mill in each of the No. 2 and No. 4 angle grinding groups operates, the jumping grinding mode is a diagonal opposite impact configuration mode, and at the moment, the No. 3 and No. 4 coal mills can be tripped; or two coal mills in the No. 1 and No. 4 angle grinding groups operate completely, one coal mill in each of the No. 2 and No. 3 angle grinding groups operates, and at the moment, the No. 2 coal mill can be tripped; or two coal mills in the No. 2 and No. 3 angle grinding groups are operated completely, one coal mill in each of the No. 1 and No. 4 angle grinding groups is operated, and at the moment, the No. 4 coal mill can be tripped; or two coal mills in the No. 2 and No. 4 angle grinding groups operate completely, one coal mill in each of the No. 1 and No. 3 angle grinding groups operates, the jumping grinding mode is a circle cutting configuration mode, and at the moment, the No. 4 coal mill can be tripped; or two coal mills in the No. 2 and No. 4 angle grinding groups are operated completely, one coal mill in each of the No. 1 and No. 3 angle grinding groups is operated, the jumping grinding mode is a diagonal opposite impact configuration mode, and at the moment, the No. 1 and No. 2 coal mills can be tripped; or two coal mills in the No. 3 and No. 4 angle grinding groups are operated completely, one coal mill in each of the No. 1 and No. 2 angle grinding groups is operated, and at the moment, the No. 6 coal mill can be tripped.

The case that two coal mills in the 3 angle mill groups are operated completely and no coal mill in the other 1 angle mill group is operated can at least comprise one of the following cases: the two coal mills in the No. 2, 3 and 4 angle grinding groups are operated completely, and at the moment, the No. 6 coal mill can be tripped; or, two coal mills in the No. 1, No. 3 and No. 4 angle grinding groups are operated completely, and at the moment, the No. 8 coal mill can be tripped; or, two coal mills in the No. 1, No. 2 and No. 4 angle grinding groups are operated completely, and at the moment, the No. 2 coal mill can be tripped; or, two coal mills in the No. 1, 2 and 3 angle grinding groups are operated completely, and at the moment, the No. 4 coal mill can be tripped.

In some implementation scenarios, when the number of currently operating coal mills in the octagonal tangential coal-fired boiler is 5, the coal mill operation condition of each angle mill group in 4 angle mill groups and the coal mill operation condition of each angle mill group in 3 angle mill groups can be divided.

Specifically, the operation condition of the coal mill in each of the 4 angle mill groups may include at least one of the following: two coal mills in the No. 1 angle grinding group are operated completely, one coal mill in each of the No. 2, 3 and 4 angle grinding groups is operated, and at the moment, the No. 2 coal mill can be tripped; or two coal mills in the No. 2 angle grinding group operate completely, one coal mill in each of the No. 1, 3 and 4 angle grinding groups operates, and at the moment, the No. 4 coal mill can be tripped; or two coal mills in the No. 3 angle grinding group operate completely, one coal mill in each of the No. 1, 2 and 4 angle grinding groups operates, and at the moment, the No. 6 coal mill can be tripped; or two coal mills in the No. 4 angle grinding group are operated completely, one coal mill in each of the No. 1, 2 and 3 angle grinding groups is operated, and at the moment, the No. 8 coal mill can be tripped.

The operation condition of each angle mill group in the 3 angle mill groups with the coal mill can at least comprise one of the following conditions: no. 1 angle grinding group has no coal grinding machine to run, and No. 3 angle grinding group has two coal grinding machines to run completely, at this time, the No. 6 coal grinding machine can be tripped; or no coal mill runs in the No. 1 angle mill group, one coal mill runs in the No. 3 angle mill group, and at the moment, the No. 5 and No. 6 coal mills can be tripped; or no coal mill operates in the No. 2 angle mill group, and two coal mills in the No. 4 angle mill group operate completely, and at the moment, the No. 8 coal mill can be tripped; or no coal mill operates in the No. 2 angle mill group, one coal mill operates in the No. 4 angle mill group, and at the moment, the No. 7 and No. 8 coal mills can be tripped; or no coal mill runs in the No. 3 angle mill group, and two coal mills in the No. 1 angle mill group run completely, and at the moment, the No. 2 coal mill can be tripped; or no coal mill runs in the No. 3 angle mill group, one coal mill runs in the No. 1 angle mill group, and at the moment, the No. 1 and No. 2 coal mills can be tripped; or no coal mill runs in the No. 4 angle mill group, and two coal mills in the No. 2 angle mill group run completely, and at the moment, the No. 4 coal mill can be tripped; or no coal mill runs in the No. 4 angle mill group, one coal mill runs in the No. 2 angle mill group, and the No. 3 and No. 4 coal mills can be tripped.

In some embodiments, the delay time of the coal mill running can be set, for example, the delay time of 7 coal mills running can be set to 2 seconds, the delay time of 6 coal mills running can be set to 2 seconds, and the delay time of 5 coal mills running can be set to 2 seconds.

In some embodiments, a signal to exit the RB may be received, and the RB jump grinding device of the octagonal tangential firing boiler exits the RB function based on the signal to exit the RB.

In some embodiments, a reset signal may be received, and the RB trip grinding device of the octagonal tangential coal-fired boiler may be reset based on the reset signal.

It is to be understood that the foregoing is only exemplary and that other modifications may occur to those skilled in the art from the teachings of the embodiments herein, but that the functions and effects achieved by the embodiments herein are covered by the scope of the embodiments herein as long as they are the same or similar to the embodiments herein.

From the above description, it can be seen that the embodiments of the present application can achieve the following technical effects: for the boiler of the octagonal tangential firing mode, RB tripping coal mill signals are received, the number of the coal mills in current operation is judged, and then corresponding tripping circuits are executed according to the number of the coal mills in current operation, so that the safety and stability of the unit can be guaranteed when an auxiliary machine fails, and the load is reduced. Through providing perfect reasonable jump-grinding logic circuit to the RB process, can ensure the reduction boiler heat load of RB in-process quick safety, realize that the stability of RB in-process flame center is not burnt partially, ensure the stable control of steam temperature. When different jumping mill logic circuits are executed, the coal mill operation in each corner mill group is guaranteed, opposite jumping adjacent corners are reserved, stable combustion after RB triggering can be better guaranteed, and stability and safety of the unit in the RB process are better guaranteed.

In the present specification, each embodiment of the method is described in a progressive manner, and the same and similar parts in each embodiment may be joined together, and each embodiment focuses on the differences from the other embodiments. Reference is made to the description of the method embodiments.

Based on the above RB skip milling control method for the octagonal tangential firing boiler, one or more embodiments of the present specification further provide an embodiment of RB skip milling control equipment for the octagonal tangential firing boiler, where the RB skip milling control equipment includes a processor and a memory for storing executable instructions of the processor, and when the processor executes the instructions, the processor implements the steps of the method in any one or more embodiments, for example, including: receiving RB tripping coal mill signals; judging the number of the coal mills in current operation; executing corresponding jumping mill circuits according to the number of the currently operated coal mills; the coal mill trip control system comprises a coal mill, a trip grinding circuit and a trip grinding circuit, wherein the number of different coal mills corresponds to different trip grinding circuits, and the trip grinding circuits are used for sending trip instructions to the coal mills.

It should be noted that the above description of the device according to the method embodiment may also include other implementation manners, and specific implementation manners may refer to the description of the related method embodiment, which is not described herein again.

The method embodiments provided in the present specification may be executed in a mobile terminal, a computer terminal, a server or a similar computing device. Taking an operation on a server as an example, fig. 4 is a hardware structure block diagram of an embodiment of an RB jumping and grinding control server of an octagonal tangential firing boiler provided in this specification, where the server may be an RB jumping and grinding control device of the octagonal tangential firing boiler or an RB jumping and grinding control device of the octagonal tangential firing boiler in the above embodiments. As shown in fig. 4, the server 10 may include one or more (only one shown) processors 100 (the processors 100 may include, but are not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 200 for storing data, and a transmission module 300 for communication functions. It will be understood by those skilled in the art that the structure shown in fig. 4 is only an illustration and is not intended to limit the structure of the electronic device. For example, the server 10 may also include more or fewer components than shown in FIG. 4, and may also include other processing hardware, such as a database or multi-level cache, a GPU, or have a different configuration than shown in FIG. 4, for example.

The memory 200 may be used to store software programs and modules of application software, such as program instructions/modules corresponding to the RB skip-grinding control method of the coal-fired boiler with the octagonal tangential circle in the embodiment of the present specification, and the processor 100 executes various functional applications and data processing by running the software programs and modules stored in the memory 200. Memory 200 may include high speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, memory 200 may further include memory located remotely from processor 100, which may be connected to a computer terminal through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission module 300 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the computer terminal. In one example, the transmission module 300 includes a Network adapter (NIC) that can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission module 300 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.

The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

The method or apparatus provided by the present specification and described in the foregoing embodiments may implement service logic through a computer program and record the service logic on a storage medium, where the storage medium may be read and executed by a computer, so as to implement the effect of the solution described in the embodiments of the present specification. The storage medium may include a physical device for storing information, and typically, the information is digitized and then stored using an electrical, magnetic, or optical media. The storage medium may include: devices that store information using electrical energy, such as various types of memory, e.g., RAM, ROM, etc.; devices that store information using magnetic energy, such as hard disks, floppy disks, tapes, core memories, bubble memories, and usb disks; devices that store information optically, such as CDs or DVDs. Of course, there are other ways of storing media that can be read, such as quantum memory, graphene memory, and so forth.

The embodiment of the RB jump grinding control method or device for the coal-fired boiler with the octagonal tangential circle provided in this specification can be implemented in a computer by a processor executing corresponding program instructions, for example, implemented in a PC end using a c + + language of a windows operating system, implemented in a linux system, or implemented in an intelligent terminal using, for example, android and iOS system programming languages, and implemented in processing logic based on a quantum computer.

It should be noted that descriptions of the apparatuses and devices described above according to the related method embodiments in the specification may also include other embodiments, and specific implementation manners may refer to descriptions of corresponding method embodiments, which are not described in detail herein.

The embodiments in the present application are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment.

For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, when implementing one or more of the present description, the functions of some modules may be implemented in one or more software and/or hardware, or the modules implementing the same functions may be implemented by a plurality of sub-modules or sub-units, etc.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, devices according to embodiments of the invention. It will be understood that the implementation can be by computer program instructions which can 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. 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.

As will be appreciated by one skilled in the art, one or more embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, one or more embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.

The above description is merely exemplary of one or more embodiments of the present disclosure and is not intended to limit the scope of one or more embodiments of the present disclosure. Various modifications and alterations to one or more embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims.

Claims

1. The utility model provides an eight angle tangent circle coal fired boiler's RB jumps and grinds controlling means which characterized in that includes:

the trigger responds to the trigger signal to output an RB tripping coal mill signal;

the judging module is connected with the trigger and the octagonal tangential coal-fired boiler and used for responding to an RB tripping coal mill signal output by the trigger and judging the number of coal mills currently running in the octagonal tangential coal-fired boiler;

the control cabinet is connected with the judging module and the octagonal tangential circle coal-fired boiler and is used for executing a corresponding jumping and grinding circuit according to a judging result output by the judging module; the coal mill trip control system comprises a coal mill, a trip grinding circuit and a trip grinding circuit, wherein the number of different coal mills corresponds to different trip grinding circuits, and the trip grinding circuits are used for sending trip instructions to the coal mills.

2. The apparatus of claim 1, further comprising:

and the selection module responds to the first trigger signal to select the tangent circle configuration mode and responds to the second trigger signal to select the diagonal hedging configuration mode.

3. The apparatus of claim 1, wherein the control cabinet comprises:

the first jumping and grinding unit is used for executing a first jumping and grinding logic circuit when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 8;

the second jumping and grinding unit is used for executing a second jumping and grinding logic circuit when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 7;

the third jumping and grinding unit is used for executing a third jumping and grinding logic circuit when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 6;

and the fourth jumping and grinding unit is used for executing a fourth jumping and grinding logic circuit when the number of the coal mills currently operating in the octagonal tangential coal-fired boiler is 5.

4. The device of claim 3, wherein eight coal mills are included in the octagonal tangential coal-fired boiler, and are sequentially marked as coal mill No. 1, coal mill No. 2, coal mill No. 3, coal mill No. 4, coal mill No. 5, coal mill No. 6, coal mill No. 7, and coal mill No. 8; wherein, No. 1 coal pulverizer and No. 2 coal pulverizer are No. 1 angle grinding group, and No. 3 coal pulverizer and No. 4 coal pulverizer are No. 2 angle grinding group, and No. 5 coal pulverizer and No. 6 coal pulverizer are No. 3 angle grinding group, and No. 7 coal pulverizer and No. 8 coal pulverizer are No. 4 angle grinding group, and No. 3 coal pulverizer and No. 7 coal pulverizer are the tiny-oil milling.

5. The apparatus of claim 4, wherein the first skip grind logic comprises:

and the first trigger circuit is used for sending a tripping instruction to the No. 2 coal mill.

6. The apparatus of claim 4, wherein the second skip grind logic comprises:

the judging circuit is used for judging the operation condition of each coal mill in the octagonal tangential coal-fired boiler;

the first exclusive-or gate circuit is connected with the judging circuit, and when the No. 2, 3, 4, 6, 7 and 8 coal mills run, one coal mill runs in the No. 1 and 5 coal mills, and the other coal mill stops, a tripping instruction is sent to the No. 1 and 5 coal mills;

the second exclusive-or gate circuit is connected with the judging circuit, and sends a tripping instruction to the No. 2 coal mill and the No. 6 coal mill when the No. 1 coal mill, the No. 3 coal mill, the No. 4 coal mill, the No. 5 coal mill, the No. 7 coal mill and the No. 8 coal mill run, one coal mill of the No. 2 coal mill and the No. 6 coal mill runs and the other coal mill stops;

the third differential OR gate circuit is connected with the judging circuit, and sends a tripping instruction to the No. 4 coal mill and the No. 8 coal mill when the No. 1 coal mill, the No. 2 coal mill, the No. 3 coal mill, the No. 5 coal mill, the No. 6 coal mill and the No. 7 coal mill run, one coal mill runs and the other coal mill stops;

the first trigger circuit is connected with the judging circuit, and sends a tripping instruction to the No. 8 coal mill when the No. 1, the No. 2, the No. 4, the No. 5, the No. 6, the No. 7 and the No. 8 coal mills run and the No. 3 coal mill stops;

and the second trigger circuit is connected with the judging circuit, and sends a tripping instruction to the No. 4 coal mill when the No. 1, the No. 2, the No. 3, the No. 4, the No. 5, the No. 6 and the No. 8 coal mills run and the No. 7 coal mill stops.

7. The apparatus of claim 4, wherein the third skipper logic circuit comprises:

the judging circuit is used for judging the operation condition of the coal mills in each angle mill group in the octagonal tangential coal-fired boiler;

the first trigger circuit is connected with the judging circuit, and when two coal mills in No. 1 and No. 2 angle grinding groups operate completely and one coal mill in No. 3 and No. 4 angle grinding groups operates, a tripping instruction is sent to the No. 2 coal mill;

the second trigger circuit is connected with the judging circuit, and when two coal mills in No. 1 and No. 3 angle mill groups are all operated, one coal mill in No. 2 and No. 4 angle mill groups is operated, and the jumping mill mode is a circle cutting configuration mode, a tripping instruction is sent to the No. 2 coal mill;

the third trigger circuit is connected with the judging circuit, and when two coal mills in No. 1 and No. 3 angle mill groups are all operated, one coal mill in No. 2 and No. 4 angle mill groups is operated, and a jumping mill mode is a diagonal opposite impact configuration mode, a tripping instruction is sent to the No. 3 and No. 4 coal mills;

the fourth trigger circuit is connected with the judging circuit, and when two coal mills in No. 1 and No. 4 angle grinding groups are all operated and one coal mill in No. 2 and No. 3 angle grinding groups is operated, a tripping instruction is sent to the No. 2 coal mill;

the fifth trigger circuit is connected with the judging circuit, and when two coal mills in No. 2 and No. 3 angle grinding groups operate completely and one coal mill in No. 1 and No. 4 angle grinding groups operates, a tripping instruction is sent to the No. 4 coal mill;

the sixth trigger circuit is connected with the judging circuit, and when two coal mills in No. 2 and No. 4 angle mill groups are all operated, and one coal mill in No. 1 and No. 3 angle mill groups is operated, and the jumping mill mode is a circle cutting configuration mode, a tripping instruction is sent to the No. 4 coal mill;

the seventh trigger circuit is connected with the judging circuit, and when two coal mills in No. 2 and No. 4 angle mill groups are all operated, one coal mill in No. 1 and No. 3 angle mill groups is operated, and a jumping mill mode is a diagonal opposite impact configuration mode, a tripping instruction is sent to the No. 1 and No. 2 coal mills;

the eighth trigger circuit is connected with the judging circuit, and when two coal mills in No. 3 and No. 4 angle grinding groups are all operated and one coal mill in No. 1 and No. 2 angle grinding groups is operated, a tripping instruction is sent to the No. 6 coal mill;

the ninth trigger circuit is connected with the judging circuit and sends a tripping instruction to the No. 6 coal mill when the two coal mills in the No. 2, 3 and 4 angle mill groups are all operated;

the tenth trigger circuit is connected with the judging circuit and sends a tripping instruction to the No. 8 coal mill when the two coal mills in the No. 1, 3 and 4 angle mill groups are all operated;

the eleventh trigger circuit is connected with the judging circuit and sends a tripping instruction to the No. 2 coal mill when the two coal mills in the No. 1, No. 2 and No. 4 angle mill groups are all operated;

and the twelfth trigger circuit is connected with the judging circuit and sends a tripping instruction to the No. 4 coal mill when the two coal mills in the No. 1, 2 and 3 angle mill groups are all operated.

8. The apparatus of claim 4, wherein the fourth skipper logic circuit comprises:

the first trigger circuit is connected with the judging circuit, and when two coal mills in the No. 1 angle grinding group are all operated and one coal mill in each of the No. 2, 3 and 4 angle grinding groups is operated, a tripping instruction is sent to the No. 2 coal mill;

the second trigger circuit is connected with the judging circuit, and when two coal mills in the No. 2 angle grinding group are all operated and one coal mill in each of the No. 1, 3 and 4 angle grinding groups is operated, a tripping instruction is sent to the No. 4 coal mill;

the third trigger circuit is connected with the judging circuit, and when two coal mills in the No. 3 angle grinding group are all operated and one coal mill in each of the No. 1, No. 2 and No. 4 angle grinding groups is operated, a tripping instruction is sent to the No. 6 coal mill;

the fourth trigger circuit is connected with the judging circuit, and when two coal mills in the No. 4 angle grinding group are all operated and one coal mill in each of the No. 1, No. 2 and No. 3 angle grinding groups is operated, a tripping instruction is sent to the No. 8 coal mill;

the fifth trigger circuit is connected with the judging circuit, and when no coal mill runs in the No. 1 angle mill group and two coal mills in the No. 3 angle mill group run completely, a tripping instruction is sent to the No. 6 coal mill;

the sixth trigger circuit is connected with the judging circuit, and when no coal mill runs in the No. 1 angle mill group and one coal mill runs in the No. 3 angle mill group, a tripping instruction is sent to the No. 5 and No. 6 coal mills;

the seventh trigger circuit is connected with the judging circuit, and when no coal mill runs in the No. 2 angle mill group and two coal mills in the No. 4 angle mill group run completely, a tripping instruction is sent to the No. 8 coal mill;

the eighth trigger circuit is connected with the judging circuit, and sends a tripping instruction to No. 7 and No. 8 coal mills when no coal mill runs in the No. 2 angle mill group and one coal mill runs in the No. 4 angle mill group;

the ninth trigger circuit is connected with the judging circuit, and when no coal mill runs in the No. 3 angle mill group and two coal mills in the No. 1 angle mill group run completely, a tripping instruction is sent to the No. 2 coal mill;

the tenth trigger circuit is connected with the judging circuit, and sends a tripping instruction to the No. 1 coal mills and the No. 2 coal mills when no coal mill in the No. 3 angle mill group operates and one coal mill in the No. 1 angle mill group operates;

the eleventh trigger circuit is connected with the judging circuit, and when no coal mill runs in the No. 4 angle mill group and two coal mills in the No. 2 angle mill group run completely, a tripping instruction is sent to the No. 4 coal mill;

and the twelfth trigger circuit is connected with the judging circuit, and sends a tripping instruction to the No. 3 coal mills and the No. 4 coal mills when no coal mill runs in the No. 4 angle mill group and one coal mill runs in the No. 2 angle mill group.

9. The apparatus of claim 2, further comprising:

and the delay unit is used for controlling the delay time of the jumping grinding of different coal mills when the logic circuit of the jumping grinding is executed.

10. An RB jump grinding control method of an octagonal tangential coal-fired boiler is characterized by comprising the following steps:

receiving RB tripping coal mill signals;

judging the number of the coal mills in current operation;

executing corresponding jumping mill circuits according to the number of the currently operated coal mills; the coal mill trip control system comprises a coal mill, a trip grinding circuit and a trip grinding circuit, wherein the number of different coal mills corresponds to different trip grinding circuits, and the trip grinding circuits are used for sending trip instructions to the coal mills.