CN202014081U - Failure safety protecting device for ''three wastes'' fluidization mixed combustion furnace - Google Patents
Failure safety protecting device for ''three wastes'' fluidization mixed combustion furnace Download PDFInfo
- Publication number
- CN202014081U CN202014081U CN2011201358858U CN201120135885U CN202014081U CN 202014081 U CN202014081 U CN 202014081U CN 2011201358858 U CN2011201358858 U CN 2011201358858U CN 201120135885 U CN201120135885 U CN 201120135885U CN 202014081 U CN202014081 U CN 202014081U
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- induced draft
- draft fan
- fan
- value comparator
- dcs
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Abstract
Disclosed is a failure safety protecting device for a ''three wastes'' fluidization mixed combustion furnace, and the failure safety protecting device for a ''three wastes'' fluidization mixed combustion furnace relates to the technical field of ''three wastes'' fluidization mixed combustion furnace. The failure safety protecting device is characterized in that a DCS (distributed control system) or a PLC (programmable logic controller) central processing unit, a draught fan on/off signal breaker, a draught fan current signal sensor and a draught fan revolving speed signal sensor are additionally provided, wherein the DCS or the PLC central processing unit also comprises a current value comparator, a revolving speed value comparator and a logic processing device; the draught fan current signal sensor and the draught fan revolving speed signal sensor are connected with an A/D (analog/digital) converter in series and then are respectively connected with the current value comparator and the revolving speed value comparator; the draught fan on/off signal breaker is connected with a digital quantity input standard level converter in series and then is connected with lines of the logic processing device; the logic processing device is connected with a digital quantity output standard level converter in series and then is connected with the line of an execution relay cutting off a circuit switch; and a plurality of pairs of normally closed switch contacts of the execution relay are respectively connected with three electromagnetic valves, a primary fan switching power supply line and a secondary fan switching power supply line in series. The failure safety protecting device can judge the closing of the valve and the fan in time.
Description
Technical field:
The utility model relates to the security protection technology of the supporting three wastes fluidisation mixed combustion furnace of synthetic ammonia, methanol production.
Background technology:
Three wastes fluidisation mixed combustion furnace has used the combustion characteristics of ebullated bed, uses the returning charge recovery technology of CFBB, has adopted the pattern of blowing-out gas waste heat boiler.Waste gas, waste residue, useless ash that ammonia is produced can reach and mix combustion simultaneously, this stove will become a blowing-out gas waste heat boiler when the single fire blowing-out gas, free burning coal (or sulphur coal), spoil, cinder etc. will become a fluidized-bed combustion boiler, and slag, gas, coal multifuel combustion will become gas, solid fluidisation mixed combustion furnace.
Its structure is that mixed combustion furnace is provided with the blowing-out gas electromagnetically operated valve, the pressure-releasing electromagnetic valve of speeding, methyl alcohol pneumoelectric magnet valve, coal charge charging aperture, outlet port.Outlet port flow through combined dust remover, waste-heat oven, electrostatic precipitator enter chimney by the induced draft fan wind-guiding, and waste-heat oven also is provided with gas off-take, is fed back to mixed combustion furnace by primary air fan, secondary air fan water conservancy diversion respectively.
When waste gas, waste residue, when useless ash mixes combustion in three wastes fluidisation mixed combustion furnace, induced draft fan breaks down, because of after the fan trouble furnace temperature descends, and operate untimely, waste gas still in the stove conveying can blast.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned defective, and a kind of three wastes fluidisation mixed combustion furnace failure safe protective device is provided.
Scheme of the present utility model is: comprise the blowing-out gas electromagnetically operated valve, the pressure-releasing electromagnetic valve of speeding, methyl alcohol pneumoelectric magnet valve, primary air fan relay switch, secondary air fan relay switch, induced draft fan relay switch, it is characterized in that: also have additional DCS or PLC central processing unit, induced draft fan start-stop signal circuit breaker, induced draft fan current signal sensor, induced draft fan rotary speed signal sensor; DCS or PLC central processing unit also comprise:
Be used to receive the induced draft fan current signal, and carry out computing current value comparator relatively with typical set value;
Be used to receive the induced draft fan tach signal, and carry out computing tachometer value comparator relatively with typical set value;
Be used for three signals of input are carried out " one adds two " logical operation, and " one adds two " logic operation result be transferred to the logic processing device of digital quantity outputting standard level translator;
Current value comparator, tachometer value comparator are connected with the logic processing device circuit respectively;
Behind induced draft fan current signal sensor, the induced draft fan rotary speed signal sensor serial connection A/D converter, be connected with current value comparator, the tachometer value comparator circuit of DCS or PLC central processing unit respectively;
Be connected with the logic processing device circuit behind the induced draft fan start-stop signal circuit breaker serial connection digital quantity input fiduciary level transducer;
Behind the logic processing device serial connection digital quantity outputting standard level translator, be connected with the execution relay circuit that cuts off contactor;
Carry out relay some to the normally closed switch contact be serially connected with the blowing-out gas electromagnetically operated valve respectively, the pressure-releasing electromagnetic valve of speeding, methyl alcohol pneumoelectric magnet valve, primary air fan relay switch, secondary air fan relay switch power circuit.
Advantage of the present utility model is: can promptly and accurately judge the induced draft fan fault, and intelligent waste gas valve and three blower fans sent in the three wastes fluidisation mixed combustion furnace stove of closing, avoid the generation of accident.
Description of drawings:
Fig. 1 is a mixed combustion furnace operational process schematic diagram.
Fig. 2 is the utility model device schematic diagram.
Fig. 3 is " one adds two " logic processing device simulation drawing.
Embodiment:
The utility model structure comprises blowing-out gas electromagnetically operated valve 1, the pressure-releasing electromagnetic valve 2 of speeding, methyl alcohol pneumoelectric magnet valve 3, primary air fan 5 relay switchs, secondary air fan 6 relay switchs, induced draft fan 7 relay switchs, it is characterized in that: also have additional DCS or PLC central processing unit, induced draft fan 7 start-stop signal circuit breakers, induced draft fan 7 current signal sensor, induced draft fan 7 rotary speed signal sensors; DCS or PLC central processing unit also comprise:
Be used to receive induced draft fan 7 current signals, and carry out computing current value comparator relatively with typical set value;
Be used to receive induced draft fan 7 tach signals, and carry out computing tachometer value comparator relatively with typical set value;
Be used for three signals of input are carried out " one adds two " logical operation, and " one adds two " logic operation result be transferred to the logic processing device of digital quantity outputting standard level translator;
Current value comparator, tachometer value comparator are connected with the logic processing device circuit respectively;
Behind induced draft fan 7 current signal sensor, the induced draft fan 7 rotary speed signal sensors serial connection A/D converter, be connected with current value comparator, the tachometer value comparator circuit of DCS or PLC central processing unit respectively;
Be connected with the logic processing device circuit behind the induced draft fan 7 start-stop signal circuit breakers series connection digital quantity input fiduciary level transducer;
Behind the logic processing device serial connection digital quantity outputting standard level translator, be connected with the execution relay circuit that cuts off contactor;
Carry out relay some to the normally closed switch contact be serially connected with blowing-out gas electromagnetically operated valve 1 respectively, the pressure-releasing electromagnetic valve 2 of speeding, methyl alcohol pneumoelectric magnet valve 3, primary air fan 5 relay switchs, secondary air fan 6 relay switch power circuits.
Induced draft fan 7 rotary speed signal sensors; Induced draft fan 7 current signals, tach signal enter DCS respectively after the A/D converting digitalization or PLC central processing unit logic area compares with the typical set value of setting respectively; Signal after both comparison value signals and the induced draft fan 7 switching signal digitlizations carries out " one adds two " logic voting of three signals in logic area, as long as the start-stop signal adds that other any signals are up to standard, after logic processing device is then exported the digital quantity instruction, make and carry out the disconnection of relay normally-closed contact, cut off blowing-out gas electromagnetically operated valve 1, the pressure-releasing electromagnetic valve 2 of speeding, methyl alcohol pneumoelectric magnet valve 3, primary air fan 5 relay switchs, secondary air fan 6 relay switch power circuits.
Control principle is: the interlocking action of warning interlock must in time, accurately, reliably take place to avoid the unnecessary accident of malfunction or tripping, and therefore gathering " induced draft fan 7 fault-signals " must be promptly and accurately.The utility model is the next to be core with DCS or PLC central processing unit, gather the start-stop signal of induced draft fan 7 simultaneously by the input module of different types of data, current signal, tach signal, the comparison value of setting with the comparator in DCS or the PLC compares, this comparison value is pre-set according to the production control needs, the output valve of comparator after relatively used " one adds two " voting logic computing again, realizing when induced draft fan 7 faults, DCS or PLC send the output signal of interlocking and close the waste gas sent in three wastes fluidisation mixed combustion furnace 4 stoves simultaneously (as blowing-out gas in 50ms, off-gas, methyl alcohol is dropped a hint etc.) the valve signal; The primary air fan 5, secondary air fan 6 of interlocking simultaneously shut down, and makes three wastes fluidisation mixed combustion furnace 4 be in dead ship condition, guarantees the safety of device.Controller transfers to host computer with induced draft fan 7 start-stop signals, current signal, the tach signal that is detected simultaneously, realizes parameter monitoring.
When induced draft fan 7 faults, be that induced draft fan 7 may be because certain device fault in the circuit loop, as the switch that closes a floodgate damages, or line broken circuit or circuit breaker damage or overcurrent or electric current are crossed and owed, or the various faults that causes such as induced draft fan 7 faults itselfs, export this breakdown switch amount signal the input interface digital module of DCS or PLC to by electrical system, convert the logic area that is transferred to DCS or PLC behind the fiduciary level digital quantity to and carry out the logical process computing.The " RUN " of induced draft fan 7 is identification with " opening " signal and " stopping " signal promptly with " fault ".
Induced draft fan 7 start-stop signals are taken from the circuit breaker auxiliary contact signal that is attempted by in the induced draft fan control circuit, this contact is opened or is closed signal and sends to DCS or PLC system input interface digital module, converts to enter DCS behind the fiduciary level digital quantity or the PLC logic area carries out the logical process computing.
When just often, power circuit breaker closes a floodgate, circuit breaker auxiliary contact closure, the conducting of induced draft fan control circuit, and induced draft fan is in the operation operating state.Otherwise power supply disconnects, and the circuit breaker auxiliary contact are opened, and induced draft fan is in the state of quitting work.
DCS or PLC gather induced draft fan 7 start-stop signals may be because the loose contact of circuit breaker auxiliary contact, or module damage when entering DCS or PLC system, or multiple factor such as its wiring disconnection, and can't normally collect, gather induced draft fan 7 current signals or tach signal so increase, judge the operation or the malfunction of induced draft fan 7 accurately with intelligence, in case the unnecessary accident of interlock system generation malfunction or tripping.
Central processing unit receives above three signals, and the host computer picture promptly shows " electric current " value, " rotating speed " value and " opening/stop " state etc., for operation supervise and control.Value with this actual current value and comparator setting compares simultaneously, analog quantity converts the digital quantity of soft contact to when current value≤set point, value with actual speed value and comparator setting compares equally, analog quantity converts the digital quantity of soft contact to when tachometer value≤set point, induced draft fan 7 current signals, tach signal and induced draft fan 7 start-stop signal three signals can be constituted interlock logic circuit ladder diagram, in PLC, carry out logical operation and judge.
When induced draft fan 7 operations are broken down, after electrical system is sent induced draft fan 7 and " is stopped " switching value signal standards level digitalization, enter DCS or PLC control system logic area, enter DCS or PLC control system logic area after induced draft fan 7 current signals or the tach signal A/D converting digitalization simultaneously, (this value is default as electric current≤10A, should decide with concrete production status) or rev/min (this value is a default in rotating speed≤300, should decide with concrete production status) analog quantity converts the digital quantity of soft contact to, DCS or PLC central processing unit logic processing device carry out " one adds two " voting logic sequential operation with above contact close signal to be handled, " if one adds two " flexible cord circle R1 send electric instruction, it is electric then through digital quantity outputting standard level translator output order the execution relay to be got, and one road normally opened contact is closed to warning system and carries out sound and light alarm; One road normally-closed contact is disconnected to interlock system and realizes interlocked control in 50ms, and the power of electromagnetic valve of valve such as cut off that blowing-out gas, off-gas, methyl alcohol are dropped a hint is closed blowing-out gas, off-gas, methyl alcohol valve such as drop a hint rapidly; Cut off primary air fan 5, secondary air fan 6 power supplys simultaneously, primary air fan 5, secondary air fan 6 interlockings are shut down, thereby realize the mixed combustion failure safe protection of three wastes fluidisation mixed combustion furnace 4 safety protection devices.
Claims (1)
1. three wastes fluidisation mixed combustion furnace failure safe protective device, comprise blowing-out gas electromagnetically operated valve (1), the pressure-releasing electromagnetic valve of speeding (2), methyl alcohol pneumoelectric magnet valve (3), primary air fan (5) relay switch, secondary air fan (6) relay switch, induced draft fan (7) relay switch, it is characterized in that: also have additional DCS or PLC central processing unit, induced draft fan (7) start-stop signal circuit breaker, induced draft fan (7) current signal sensor, induced draft fan (7) rotary speed signal sensor; DCS or PLC central processing unit also comprise:
Be used to receive induced draft fan (7) current signal, and carry out computing current value comparator relatively with typical set value;
Be used to receive induced draft fan (7) tach signal, and carry out computing tachometer value comparator relatively with typical set value;
Be used for three signals of input are carried out " one adds two " logical operation, and " one adds two " logic operation result be transferred to the logic processing device of digital quantity outputting standard level translator;
Current value comparator, tachometer value comparator are connected with the logic processing device circuit respectively;
Behind induced draft fan (7) current signal sensor, induced draft fan (7) the rotary speed signal sensor serial connection A/D converter, be connected with current value comparator, the tachometer value comparator circuit of DCS or PLC central processing unit respectively;
Be connected with the logic processing device circuit behind induced draft fan (7) the start-stop signal circuit breaker series connection digital quantity input fiduciary level transducer;
Behind the logic processing device serial connection digital quantity outputting standard level translator, be connected with the execution relay circuit that cuts off contactor;
Carry out that relay is some to be serially connected with blowing-out gas electromagnetically operated valve (1), the pressure-releasing electromagnetic valve of speeding (2), methyl alcohol pneumoelectric magnet valve (3), primary air fan (5) relay switch, secondary air fan (6) relay switch power circuit respectively to the normally closed switch contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201358858U CN202014081U (en) | 2011-04-29 | 2011-04-29 | Failure safety protecting device for ''three wastes'' fluidization mixed combustion furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201358858U CN202014081U (en) | 2011-04-29 | 2011-04-29 | Failure safety protecting device for ''three wastes'' fluidization mixed combustion furnace |
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| Publication Number | Publication Date |
|---|---|
| CN202014081U true CN202014081U (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201358858U Expired - Fee Related CN202014081U (en) | 2011-04-29 | 2011-04-29 | Failure safety protecting device for ''three wastes'' fluidization mixed combustion furnace |
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| CN (1) | CN202014081U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324725A (en) * | 2011-04-29 | 2012-01-18 | 智胜化工股份有限公司 | Failure security protection method of three wastes fluidization mixing combustion furnace and device |
-
2011
- 2011-04-29 CN CN2011201358858U patent/CN202014081U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324725A (en) * | 2011-04-29 | 2012-01-18 | 智胜化工股份有限公司 | Failure security protection method of three wastes fluidization mixing combustion furnace and device |
| CN102324725B (en) * | 2011-04-29 | 2013-12-18 | 智胜化工股份有限公司 | Failure security protection method of three wastes fluidization mixing combustion furnace and device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20140429 |