CN207298924U

CN207298924U - A kind of feeder logical interlock system

Info

Publication number: CN207298924U
Application number: CN201720783615.5U
Authority: CN
Inventors: 李欣欣; 章俊成; 梅睿
Original assignee: Huangling Mining Group Co Ltd
Current assignee: Huangling Mining Group Co Ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2018-05-01
Anticipated expiration: 2027-06-30

Abstract

The utility model discloses a kind of feeder logical interlock system,Including DCS system,Control instrument,Frequency converter and give coal belt motor,The DCS system passes through the control instrument successively,Frequency converter is connected with described to coal belt motor,The DCS system connects interlocking switching module,The interlocking switching module is used to send coal amount set-point and instantaneous coal amount signal to the DCS system,The DCS system sends operational order according to the signal to the control instrument,The control instrument control receives described instruction and controls the frequency converter,Utilize the original interlocking switching functional block of Hollysys's system,Realize allows feeder to put into the protection when feeder coal-supplying amount is more than more than 5t/h,After protection input,When feeder coal amount is less than 5t/h shunt tripping feeders,Chain button automatically exits from the same time,Operation people is reminded to carry out disconnected coal operation,Whole system is safe and reliable,Environmental protection,Effective control environmental protection index is in the range of national regulation,Avoid burner hearth coking and the generation of deflagration accident.

Description

A kind of feeder logical interlock system

Technical field

The utility model belongs to power plant coal feeder protection system field of circuit technology, and in particular to a kind of feeder logical interlock System.

Background technology

Often there is disconnected coal phenomenon to 2X300MW circulating fluidized bed boiler in feeder in operation, when DCS shows that coal amount is 0 When, remaining coal on belt after feeder weighing apparatus can be sent into burner hearth by feeder with maximum (top) speed, cause boiler oxygen amount significantly ripple Dynamic, burner hearth bed temperature rises, environmental protection index rises, main vapour pressure fluctuation.When the processing of disconnected coal is normal, start to after coal when coal amount is shown When normal, the coal of the feeder is actual to be introduced into burner hearth, and the actual total coal amount of boiler is less than normal than display coal amount, until the feeder coal Actually entering burner hearth could recover normal.

Since current each high-power station is when designing feeder logic, as long as there is Peng's coal feeder and can't detect weight in feeder Amount 50HZ will operate, original coal nearly on 30 meters of long belts be fully entered burner hearth, i.e., when substantial amounts of coal enters burner hearth After cannot fully burn, cause boiler oxygen amount to fluctuate widely, burner hearth bed temperature rise, main vapour pressure fluctuation, boiler adjustment will plus Acute, environmental protection index rises, a series of chain problems such as not up to standard that seriously affect boiler safety stable operation and environment protection digital.

Utility model content

The technical problem to be solved by the utility model is to for above-mentioned deficiency of the prior art, there is provided one kind gives coal Machine logical interlock system, designs chain switching functional block, in the case of the button throwing of the protection is moved back, in order to which coal is thrown in ignition of the boiler Need, feeder can be run with low speed.

The utility model uses following technical scheme：

A kind of feeder logical interlock system, including DCS system, control instrument, frequency converter and coal belt motor is given, it is described DCS systems are connected by the control instrument, frequency converter with described to coal belt motor successively, and the DCS system is connected with connection Lock switching module, the interlocking switching module includes interlocking input block and block is exited in interlocking, the interlocking exit block be used for Input before the operation of coal belt motor, the interlocking input block be used to cut off automatically make it is described to coal belt motor stop jumping, it is described Lock switching module to be used to send coal amount set-point and instantaneous coal amount signal to the DCS system, the DCS system is used for by described in Signal is sent to the control instrument, and the control instrument receives the signal and is sent to the frequency converter.

Further, described to be connected with speed probe to coal belt motor, the speed probe is used to gather described To coal belt motor tach signal and be sent to the control instrument.

Further, the control instrument is also associated with weighing sensor.

Further, the control instrument is 6105P types on the spot, for instantaneous coal amount signal to be fed back to the DCS systems System.

Compared with prior art, the utility model at least has the advantages that：

The utility model feeder logical interlock system is real by connecting the original interlocking switching functional block of Hollysys's system Showed allows feeder to put into the protection when feeder coal-supplying amount is more than more than 5t/h, after protection is put into, when feeder coal amount Less than 5t/h shunt tripping feeders, while chain button automatically exits from, and reminds operation people to carry out disconnected coal operation, and whole system safely may be used Lean on, effectively save manpower and materials, it is effective to control environmental protection index to avoid burner hearth coking and detonation thing in the range of national regulation Therefore generation, the higher of the safe and environment-friendly stable operation of active response National Development and Reform Commission and National Energy Board to power plant will Ask.

Further, set speed probe and weighing sensor more accurately that tach signal and weighing-up wave is accurate By belt measurement rotating speed and weighing-up wave pass to 6105P controllers.

Further, 6105P types, this controller can claim by the tach signal of belt and to coal on the spot for control instrument selection Weight signal carries out that the instantaneous coal amount of accurate belt and accumulative coal amount is calculated according to formula, and is passed by 4~20MA signals DCS systems are passed, and this control carries display function on the spot, can be with the instantaneous coal amount of real-time display and accumulative coal amount.

Below by drawings and examples, the technical solution of the utility model is described in further detail.

Brief description of the drawings

Fig. 1 is the utility model principle figure；

Fig. 2 interlocks switching function module schematic diagram for the utility model；

Fig. 3 interlocks switching function sequence diagram for the utility model.

Embodiment

The utility model provides a kind of feeder logical interlock system, the chain input functional block of design one and a company Lock excision functional block, is less than 5t/h in boiler coal feeding machine-made egg-shaped or honey-comb coal briquets amount, the shunt tripping feeder in the case of protection block input.

Referring to Fig. 1, the utility model discloses a kind of feeder logical interlock system, including DCS system, the DCS System is connected by 6105P types control instrument and frequency converter on the spot with to coal belt motor successively, and the DCS system connects respectively Interlocking puts into block and block is exited in interlocking, and the interlocking puts into block and 6105P types control instrument is respectively used to instantaneous coal on the spot Amount signal is sent to the DCS system, and the interlocking exits block and is used to coal amount set-point being sent to the DCS system, described DCS systems send operational order according to received signal to the type control instruments of 6105P on the spot, by the 6105P types on the spot Control instrument controls the frequency converter to be controlled to described to coal belt motor.

Described to be connected with speed probe to coal belt motor, the speed probe is used to gather described electric to coal belt The tach signal of machine is simultaneously sent to that described 6105P types control instrument, the type control instruments of 6105P on the spot are also associated with claiming on the spot Retransmit sensor.

Referring to Fig. 2, wherein, AO is automatically engages input terminal, and AF is automatic excision input terminal, and BL inputs for exterior locking End, for DV for input excision output terminal, instantaneous coal amount when what AO automatically engaged input terminal connection is feeder operation is more than 5t/h Signal, the TRUE signals put into manually with interlocking input block are carried out with being connected after logic；AF cut off automatically input terminal connection be Feeder operation number disappear or interlocking exit block put into manually TRUE signals occur interlocking input block automatically exit from；DV inputs are cut Instantaneous coal amount when being run except output terminal TRUE signals and feeder is less than 5t/h signals and carries out entering feeder with logical signal Trip signal, which is given, obtains L1 equipment protection OFF signals in block HSSCS6 in proper order.

Using the original interlocking switching functional block (SLC) of Hollysys's system, chain input functional block and a company are devised Lock excision functional block, the interlocking input root tuber work according to instantaneous coal amount, when being run to coal and coal amount is more than 5t/h, The interlocking input block allows protection to put into, and after protection is put into, when feeder coal amount is less than 5t/h, protects automatic excision, The interlocking input block automatically exits from, and feeder trip signal is closed letter to L1 equipment protections are obtained in block (HSSCS6) in proper order Number, so as to play feeder stop jumping, do not join and close feeder outlet electrically operated gate purpose, feeder is quickly opened after stop jumping It is dynamic.

Referring to Fig. 3, interlocking switching functional block is mainly used for program-controlled group of the equipment and its subgroup logic of interlocking function, with The enhancing of unit function and the raising of the degree of automation, many equipment need to automatically engage interlocking and automatically terminate interlocking, are Maloperation is avoided, it is necessary to which the switching of locking interlocking, when there is input signal in the case of no block signal, output input refers to Make, and produce input output until being removed, when there is block signal, shield automatically and manually input logic.

Above content is only to illustrate the technological thought of the utility model, it is impossible to the protection model of the utility model is limited with this Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical solution, each falls within this reality Within protection domain with new claims.

Claims

1. a kind of feeder logical interlock system, it is characterised in that including DCS system, control instrument, frequency converter and give coal belt Motor, the DCS system are connected by the control instrument, frequency converter with described to coal belt motor successively, the DCS system Interlocking switching module is connected, the interlocking switching module includes interlocking input block and block is exited in interlocking, and block is exited in the interlocking For the input before the operation of coal belt motor is being given, the interlocking input block, which is used to cut off automatically, to be made described to jump to coal belt motor Stop, the interlocking switching module is used to send coal amount set-point and instantaneous coal amount signal, the DCS system to the DCS system For the signal to be sent to the control instrument, the control instrument receives the signal and is sent to the frequency converter.

2. a kind of feeder logical interlock system according to claim 1, it is characterised in that described to connect to coal belt motor Speed probe is connected to, the speed probe is used to gather the tach signal to coal belt motor and is sent to the control Instrument processed.

3. a kind of feeder logical interlock system according to claim 2, it is characterised in that the control instrument is also connected with There is weighing sensor.

4. a kind of feeder logical interlock system according to claim 2, it is characterised in that the control instrument is on the spot 6105P types, for instantaneous coal amount signal to be fed back to the DCS system.