CN104930862A - Alarm type sintering waste heat power generation system based on buffer power circuit - Google Patents
Alarm type sintering waste heat power generation system based on buffer power circuit Download PDFInfo
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- CN104930862A CN104930862A CN201510272109.5A CN201510272109A CN104930862A CN 104930862 A CN104930862 A CN 104930862A CN 201510272109 A CN201510272109 A CN 201510272109A CN 104930862 A CN104930862 A CN 104930862A
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Abstract
The invention discloses an alarm type sintering waste heat power generation system based on a buffer power circuit. The alarm type sintering waste heat power generation system based on the buffer power circuit comprises a sintering machine hot flue gas system, a hot waste gas heat utilization system and a sintering waste heat power generation thermal system. A buffer power output system connected with the output end of a turbine generator is arranged in the sintering waste heat power generation thermal system. The buffer power output system comprises a temperature alarm circuit, the buffer power circuit and a storage battery or electric equipment connected with the buffer power circuit. The buffer power circuit is composed of a buffer circuit and a power circuit. The stability of the alarm type sintering waste heat power generation system is improved, and the service life of the alarm type sintering waste heat power generation system is prolonged; running circuits in the system are adjusted so that damage to the storage battery or the electric equipment due to too high voltage fluctuation can be avoided.
Description
Technical field
The invention belongs to steel works sintering cogeneration technology field, particularly a kind of alarm type sintering waste heat generating system based on buffered sources circuit.
Background technology
In steel manufacture process, the energy consumption of sintering circuit accounts for 10% of total energy consumption, is only second to Iron-smelting, occupies second.In sintering circuit total energy consumption, the heat energy of nearly 50% enters air with the sensible heat form of sintering device flue gas and cooling machine waste gas, and sintering waste heat generating is the Important Action that steel plant realize energy-saving and emission-reduction.
In sintering machine non-desulfurization smoke pipe, amount of sulfur contenting in smoke is lower, and flue-gas temperature is more than 300 DEG C; Cooler exhaust gas recycling temperature is at 200 ~ 500 DEG C.In existing alarm type sintering waste heat generating system, sintering device flue gas system need arrange Induced fan and extract flue gas, and operating cost is higher, fault rate is high; Central cooler one, two sections of hot waste gas only arrange single flue gas leading, cause sealing internal mask pressure uneven, form district of local decompression, a large amount of cold airs bleeds seal closure, reduce flue-gas temperature, and flue-gas temperature fluctuation is comparatively large, cause afterheat generating system fluctuation of service, actual power generation only has 60% ~ 70% of former design generated energy.
For the problems referred to above existed, make full use of sintering device flue gas, central cooler waste gas residual heat, the stability improving afterheat generating system improves the key of sintering waste heat generating technology.Induced fan need be set for existing alarm type sintering waste heat generating system and extract flue gas, operating cost is higher, fault rate is high, and cogeneration fluctuation of service in method for power generation by waste heat, the defect that the aobvious utilization rate of heat is not high, of the present inventionly aim to provide a kind of alarm type sintering waste heat generating system and method, normally produce not affecting sintering circuit, when ensureing sintering quality, make full use of the flue gas of the non-desulfurization smoke pipe of sintering machine afterbody, the alarm type sintering waste heat generating system of cooling machine waste gas waste heat, and adopt the extraction of sintering exhaust-heat boiler tail flue gas not establish Induced fan, central cooler one, the method that in two sections of seal closures, hot waste gas lead-out mode and component loops utilize, sintering device flue gas and central cooler waste gas residual heat can be made full use of, reduce equipment investment, reduce operating cost, improve the generated energy of alarm type sintering waste heat generating system.
In addition, the present invention, in order to improve stability and the service life of product further, has carried out increasing changing to the internal operation circuit of product, and electric current when reducing electric power starting and cut off in circuit and the impact of voltage, to reduce the energy consumption of opening with when cutting off the electricity supply.The temperature that circuit runs can also be monitored, damage to avoid product to run in high temperature.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, provide a kind of alarm type sintering waste heat generating system based on buffered sources circuit.
To achieve these goals, the present invention realizes by the following technical solutions:
Based on the alarm type sintering waste heat generating system of buffered sources circuit, comprise sintering machine heat smoke system, hot waste gas bootstrap system and sintering waste heat generating therrmodynamic system, described sintering machine heat smoke system comprises the many heat smoke fairleads being arranged on sintering machine afterbody, be arranged on the heat smoke fairlead other end and the afterbody heat smoke header be communicated with it, be arranged on the heat smoke extraction pipe valve of on heat smoke fairlead and close afterbody heat smoke header one end, be arranged on the main exhauster of afterbody heat smoke header end, and the heat smoke arm be arranged on heat smoke fairlead and heat smoke manifold valve, wherein, the other end of heat smoke arm is communicated with smoke and waste steam boiler by gas approach, and the exhanst gas outlet of smoke and waste steam boiler is communicated with afterbody heat smoke header by waste heat boiler back-end ductwork, described hot waste gas bootstrap system comprises and is arranged on one section of seal closure on central cooler and two sections of seal closures, be arranged on the seal closure chimney on one section of seal closure and two sections of seal closures and seal closure chimney valve respectively simultaneously, to be arranged in one section of seal closure and two sections of seal closures and seal closure to be separated into the demarcation strip of 2 ~ 3 sections, be arranged at least one one section of hot waste gas arm on one section of seal closure and two sections of seal closures and at least one two sections of hot waste gas arms, and be arranged on the hot waste gas manifold valve on one section of hot waste gas arm and two sections of hot waste gas arms, wherein, one section of hot waste gas arm is communicated with waste gas residual heat boiler exhaust gas inlet respectively through one section of hot waste gas header, two sections of hot waste gas headers with the other end of two sections of hot waste gas arms, the waste gas outlet of waste gas residual heat boiler is connected with air-introduced machine by pipeline, air-introduced machine is also connected with chimney and circulating fan by pipeline, this pipeline is provided with the chimney valve corresponding with chimney and circulating fan valve, and this circulating fan is also connected with the blast pipe of central cooler, described sintering waste heat generating therrmodynamic system comprises the pressure superheater being arranged in waste gas residual heat boiler top, with the steam turbine of pressing the outlet of superheater to be connected by pipeline in this, be positioned at the low-pressure superheater on waste gas residual heat boiler top, be positioned at the superheater on smoke and waste steam boiler top, header is collected by pipeline communication with the outlet of this low-pressure superheater and superheater, filling mouth is by pipeline and the steam turbine collecting header and be connected, be arranged on the steam turbine generator of steam turbine side, be connected in the condenser of the steam drain of steam turbine, the condensate pump be connected through pipeline with condenser, with be positioned at waste gas residual heat boiler afterbody and the condensation water heater that is connected with condensate pump of import, with the outlet of condensation water heater and the low-pressure drum and the oxygen-eliminating device being positioned at waste gas residual heat boiler side is held concurrently that is connected, be communicated with this oxygen-eliminating device low-pressure drum of holding concurrently and be arranged on the low pressure evaporator in the middle part of waste gas residual heat boiler, and the hold concurrently upper end of low-pressure drum of import and this oxygen-eliminating device is connected and is arranged on the low-pressure superheater on waste gas residual heat boiler top, wherein, oxygen-eliminating device low-pressure drum lower end of holding concurrently is divided into two-way by pipeline through feed pump: lead up to the inlet communication of economizer of pressure-reducing valve and smoke and waste steam boiler bottom, the outlet of the economizer of this smoke and waste steam boiler is connected with the low-pressure drum of smoke and waste steam boiler side, this low-pressure drum is communicated with the evaporimeter in the middle part of smoke and waste steam boiler, this low-pressure drum also with the inlet communication of the superheater on smoke and waste steam boiler top, another road is connected with the import of the economizer of waste gas residual heat boiler bottom, the outlet of the economizer of this waste gas residual heat boiler is communicated with the pressure drum being arranged in waste gas residual heat boiler side, drum is pressed to be communicated with the middle pressure evaporimeter on waste gas residual heat boiler top in this, drum is pressed also to be connected with the superheater import of pressing being arranged in waste gas residual heat boiler top in this, the buffered sources output system be connected on the output of steam turbine generator is also provided with in described sintering waste heat generating therrmodynamic system, this buffered sources output system comprises temperature alarm circuit, buffered sources circuit and the battery be connected with this buffered sources circuit or electrical equipment, described buffered sources circuit is made up of buffer circuit and power circuit again, described temperature alarm circuit is by triode VT3, triode VT4, triode VT5, amplification chip IC1, time base circuit chip IC 2, one end is connected with the IN+ pin of amplification chip IC1, the thermistor RT1 that the other end is connected with input, one end is connected with the IN-pin of amplification chip IC1, the resistance R16 that the other end is connected with input, be serially connected in the resistance R15 between the IN-pin of amplification chip IC1 and Vcc-pin, one end is connected with the IN-pin of amplification chip IC1, the resistance R17 that the other end is connected with the Vcc-pin of amplification chip IC1 after slide rheostat RP2, positive pole is connected with input, the electric capacity C10 of minus earth, one end is connected with the positive pole of electric capacity C10, the inductance L 3 that the other end is connected with the colelctor electrode of triode VT3, one end is connected with the colelctor electrode of triode VT3, the resistance R20 that the other end is connected with the colelctor electrode of triode VT4, P pole is connected with the base stage of triode VT4, the Zener diode D4 that N pole is connected with the OFFSET pin of amplification chip IC1 after resistance R18, one end is connected with the emitter stage of triode VT4, the resistance R19 that the other end is connected with the emitter stage of triode VT5, one end is connected with the colelctor electrode of triode VT3, the resistance R21 that the other end is connected with the Discharge pin of time base circuit chip IC 2, one end is connected with the Discharge pin of time base circuit chip IC 2, the resistance R22 that the other end is connected with the Tegger pin of time base circuit chip IC 2, positive pole is connected with the Tegger pin of time base circuit chip IC 2, the electric capacity C12 of minus earth, positive pole is connected with the Controlvoltage pin of time base circuit chip IC 2, the electric capacity C15 of minus earth, positive pole is connected with the Output pin of time base circuit chip IC 2, the electric capacity C13 that negative pole is connected with the negative pole of electric capacity C15 after loudspeaker P, positive pole is connected with the positive pole of electric capacity C13, the electric capacity C14 that negative pole is connected with the negative pole of electric capacity C15 after resistance R23, and positive pole is connected with the colelctor electrode of triode VT3, the electric capacity C11 of minus earth forms, wherein, the Vcc+ pin of amplification chip IC1 is directly connected with input, the base earth of triode VT3, and the emitter stage of triode VT3 is connected with the base stage of triode VT4, the colelctor electrode of triode VT5 is connected with the PFFSET pin of amplification chip IC1, and the base earth of this triode VT5, the colelctor electrode of triode VT4 is connected with the Reset pin of time base circuit chip IC 2, the Tegger pin of time base circuit chip IC 2 is connected with the Threshold pin of this time base circuit chip IC 2, the GND pin ground connection of time base circuit chip IC 2, the Vcc pin of time base circuit chip IC 2 is connected with the colelctor electrode of triode VT3.
Further, above-mentioned buffer circuit is by triode VT1, triode VT2, positive pole is connected with the colelctor electrode of triode VT1 after resistance R7, the electric capacity C7 that negative pole is connected with the base stage of triode VT1, the electric capacity C6 that negative pole is connected with the negative pole of electric capacity C7 after resistance R6, the resistance R5 in parallel with electric capacity C6, one end is connected with the positive pole of electric capacity C7, the other end forms the inductance L 1 of input together with the positive pole of electric capacity C6, plus earth, the electric capacity C9 that negative pole is connected with the base stage of triode VT2 after resistance R8, one end is connected with the negative pole of electric capacity C9, the resistance R9 that the other end is connected with the colelctor electrode of triode VT2, one end is connected with the negative pole of electric capacity C7, the inductance L 2 of other end ground connection after resistance R14, positive pole is connected with the emitter stage of triode VT2 after resistance R10, the electric capacity C8 that negative pole is connected with the emitter stage of triode VT2 after resistance R11, one end is connected with the positive pole of electric capacity C8, the resistance R12 that the other end is connected with the tie point of resistance R14 with inductance L 2, and one end is connected with the positive pole of electric capacity C8, the resistance R14 of other end ground connection forms, wherein, the grounded emitter of triode VT1, the colelctor electrode of triode VT1 is connected with the base stage of triode VT2.
Further, above-mentioned power circuit is by diode bridge rectifier U1, primary coil is as input, the transformer T1 that secondary coil two ends are connected with two inputs of diode bridge rectifier U1 respectively, positive pole is connected with the positive output end of diode bridge rectifier U1 after resistance R1, the electric capacity C1 that negative pole is connected with the negative output terminal of diode bridge rectifier U1 after resistance R2, positive pole is connected with the positive pole of electric capacity C1, the electric capacity C2 that negative pole is connected with the negative pole of electric capacity C1 after resistance R3, N pole is connected with the positive pole of electric capacity C2, P pole is in turn through resistance R4, the diode D1 be connected with the negative pole of electric capacity C2 after slide rheostat RP1, positive pole is connected with the P pole of diode D1 after diode D2, the electric capacity C4 that negative pole is connected with the negative pole of electric capacity C2, positive pole is connected with the negative pole of electric capacity C1, the electric capacity C3 that negative pole is connected with the positive pole of electric capacity C1, positive pole is connected with the P pole of diode D1, the electric capacity C5 that negative pole is connected with the negative pole of electric capacity C4, the diode D3 that N pole is connected with the positive pole of electric capacity C5, wherein, diode D2 and resistance R4 is arranged in parallel, the negative pole of electric capacity C3 is connected with inductance L 1, the positive pole of electric capacity C3 is connected with the positive pole of electric capacity C6, the positive pole of electric capacity C4 is connected with the negative pole of electric capacity C8, the P pole of diode D3 is connected with the colelctor electrode of triode VT2, and the input of temperature alarm circuit is connected on the positive pole of electric capacity C5.
In addition, described triode VT1, triode VT2, triode VT3 and triode VT4 are NPN type triode, and triode VT5 is PNP type triode.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention effectively make use of the heat smoke of the non-desulfurization bellows of sintering machine afterbody, the hot waste gas of central cooler one, two sections of seal closures, improves the utilization ratio of sintering system waste heat, adds cogeneration amount.
(2) the present invention is by controlling flue resistance and waste gas residual heat boiler flue gas resistance, realizes not establishing Induced fan to utilize sintering machine heat smoke, can reduce equipment investment, reduce operating cost, improve stability and the reliability of system cloud gray model.
(3) the present invention carries out annular cooler sealing cap segmentation, arranges 2 ~ 3 road hot waste gas arms respectively, can control pressure distribution in seal closure even, and be in the slight positive pressure state of 0 ~ 50Pa, reduce seal closure to leak out, ensure that EGT is stablized, improve the stability of system cloud gray model.
(4), in cogeneration therrmodynamic system of the present invention, low-pressure steam subsystem adopts and collects header, water supply system employing pressure-reducing valve, simplifies system, reduces equipment investment and operating cost.
(5) the present invention can better be suppressed the electric current in circuit and voltage in the moment of power initiation or power-off by buffered sources output system; avoid the excessive curtage of instantaneous variation and damage circuit; also reduce instantaneous power consumption when power initiation or power-off simultaneously; reduce the power attenuation of circuit; better protect the operation of circuit simultaneously, improve the service life of product.
(6) the present invention is by set temperature warning circuit, can be good at monitoring the running temperature of buffered sources output system, can immediately give the alarm when its running temperature is too high, avoid buffered sources output system continue at high temperature to run and cause its circuit damage, substantially increase safety in utilization and the service life of product.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the circuit diagram of power circuit of the present invention.
Fig. 3 is the circuit diagram of buffer circuit of the present invention.
Fig. 4 is the circuit diagram of temperature buzzer circuit of the present invention.
Wherein, the Reference numeral title in accompanying drawing is respectively:
1-sintering machine; 2-heat smoke fairlead; 3-smoke and waste steam boiler; 4-main exhauster; 5-central cooler; 6-mono-section of hot waste gas arm; 7-bis-sections of hot waste gas arms; 8-waste gas residual heat boiler; 9-air-introduced machine; 10-circulating fan; 11-chimney; 12-oxygen-eliminating device is held concurrently low-pressure drum; Drum is pressed in 13-; 14-feed pump; 15-pressure-reducing valve; 16-collects header; 17-steam turbine; 18-generator; 19-condenser; 20-condensate pump; Superheater is pressed in 21-; 22-low-pressure superheater; 23-superheater; Evaporimeter is pressed in 24-; 25-low pressure evaporator; 26-afterbody heat smoke header; 27-heat smoke draws pipe valve; 28-heat smoke arm; 29-heat smoke manifold valve; 30-hot waste gas manifold valve; 31-chimney valve; 32-circulating fan valve; 33-mono-section of hot waste gas header; 34-bis-sections of hot waste gas headers; 35-waste heat boiler back-end ductwork; 36-condensation water heater; 37-evaporimeter; 38,39-economizer; 40-low-pressure drum.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention includes sintering machine heat smoke system, hot waste gas bootstrap system and sintering waste heat generating therrmodynamic system;
Described sintering machine heat smoke system is: bottom sintering machine 1, bellows are respectively provided with a heat smoke fairlead 2, and this heat smoke fairlead 2 other end is communicated with afterbody heat smoke header 26.Be equipped with heat smoke on each heat smoke fairlead 2 and near afterbody heat smoke header 26 one end and draw pipe valve 27, this afterbody heat smoke header 26 one end is provided with main exhauster 4, from sintering machine afterbody second from the bottom heat smoke fairlead 2,2 ~ 4 heat smoke fairleads 2 are provided with heat smoke arm 28 and heat smoke manifold valve 29, heat smoke arm 28 other end is communicated with smoke and waste steam boiler 3 top, and smoke and waste steam boiler 3 bottom is communicated with sintering machine tail flue gas header 26 by back-end ductwork 35.
Described hot waste gas bootstrap system is: central cooler 5 is provided with one, two sections of seal closures, this is one years old, two sections of seal closures are respectively equipped with seal closure chimney, the demarcation strip that seal closure can be separated into 3 sections is provided with in this section of seal closure, one section of seal closure is provided with three hot waste gas arms 6, the demarcation strip that seal closure can be separated into 2 sections is provided with in these two sections of seal closures, two sections of seal closures are provided with two hot waste gas arms 7, hot waste gas arm 6, hot waste gas manifold valve 30 is equipped with on 7, hot waste gas arm 6, 7 other ends are respectively through one, two sections of hot waste gas headers 33, 34 are communicated with waste gas residual heat boiler 8 top, waste gas residual heat boiler 8 bottom is connected with air-introduced machine 9 by pipeline, air-introduced machine 9 is communicated with circulating fan 10 with chimney 11 respectively by pipeline, this pipeline is respectively equipped with corresponding chimney valve 31 and circulating fan valve 32, this circulating fan 10 is connected with central cooler 5 blast pipe.
Described sintering waste heat generating therrmodynamic system is: the outlet being arranged in the pressure superheater 21 at waste gas residual heat boiler 8 top is connected with steam turbine 17 main inlet throttle-stop valve by pipeline, the outlet being positioned at the low-pressure superheater 22 on waste gas residual heat boiler 8 top by pipeline with collect header 16 and be communicated with, the outlet being positioned at the superheater 23 on smoke and waste steam boiler 3 top by pipeline with collect header 16 and be communicated with, collect header 16 to be connected with steam turbine 17 filling mouth by pipeline, for steam turbine 17 supplies steam, steam turbine 17 side is provided with steam turbine generator 18, steam turbine 17 steam drain is connected with condenser 19, this condenser 19 is connected with condensate pump 20 through pipeline, condensate pump 20 is connected with the import of the condensation water heater 36 being positioned at waste gas residual heat boiler 8 afterbody, outlet and the oxygen-eliminating device being positioned at waste gas residual heat boiler 8 side of condensation water heater 36 low-pressure drum 12 of holding concurrently is connected, this oxygen-eliminating device low-pressure drum 12 of holding concurrently is communicated with the low pressure evaporator 25 in the middle part of waste gas residual heat boiler 8, this oxygen-eliminating device low-pressure drum 12 upper end of holding concurrently is connected with low-pressure superheater 22 import on waste gas residual heat boiler 8 top, oxygen-eliminating device low-pressure drum 12 lower end of holding concurrently is divided into two-way by pipeline through feed pump 14: lead up to the inlet communication of alkali pressure valve 15 and the economizer 39 of smoke and waste steam boiler 3 bottom, the outlet of the economizer 39 of this smoke and waste steam boiler 3 is connected with the low-pressure drum 40 of smoke and waste steam boiler 3 side, this low-pressure drum 40 is communicated with the evaporimeter 37 in the middle part of smoke and waste steam boiler 3, this low-pressure drum 40 also with the inlet communication of the superheater 23 on smoke and waste steam boiler 3 top, another road is connected with the import of the economizer 38 of waste gas residual heat boiler 8 bottom, the outlet of the economizer 38 of this waste gas residual heat boiler 8 is communicated with the pressure drum 13 being arranged in waste gas residual heat boiler 8 side, press drum 13 to be communicated with the middle pressure evaporimeter 24 on waste gas residual heat boiler 8 top in this, in this, press drum 13 to be also connected with superheater 21 import of pressing being arranged in waste gas residual heat boiler 8 topmost.
Described waste gas residual heat boiler 8 is binary channels two pressure waste gas residual heat boiler; Described steam turbine 17 is filling condensing turbine.Described heat smoke extraction pipe valve 27, heat smoke manifold valve 29, hot waste gas manifold valve 30, circulating fan valve 32, chimney valve 31 are electric control valve.
Utilize the method that the present invention generates electricity, when alarm type sintering waste heat generating system runs, close heat smoke and draw pipe valve 27, regulate the aperture of heat smoke manifold valve 29, smoke and waste steam boiler 3 fume side resistance is made to be no more than 800Pa, smoke and waste steam boiler 3 is no more than 1200Pa with total flue gas resistance of heat smoke arm 28, waste heat boiler 3 back-end ductwork 35, and in heat smoke arm 28, flue-gas temperature controls at 300 ~ 350 DEG C; Close seal closure chimney valve, regulate the aperture of hot waste gas manifold valve 30 and circulating fan valve 32, ensure that in one, two section of seal closure, flue gas pressures is evenly distributed, and in one, two section of seal closure Stress control at 0 ~ 50Pa, in one section of hot waste gas header 33, EGT controls at 350 ~ 450 DEG C, and two sections of hot waste gas header 34 EGTs control at 210 ~ 280 DEG C.
Concrete electrification technique as well as flow process is: middle pressure steam is sent into steam turbine 17 main inlet throttle-stop valve by pipeline by the pressure superheater 21 being arranged in waste gas residual heat boiler 8 top, middle pressure steam feeding is collected header 16 by pipeline by the superheater 23 being positioned at smoke and waste steam boiler 3 top, low-pressure steam feeding is collected header 16 by pipeline by the low-pressure superheater 22 being positioned at waste gas residual heat boiler 8 top, collects header 16 and steam is sent into steam turbine 17 filling mouth again, steam through steam turbine 17 do work and drive electrical generators 18 generate electricity, water is condensed into through condenser 19 after steam acting, sent into by condensate pump 20 again in the condensation water heater 36 of waste gas residual heat boiler 8 afterbody and heat, water after heating is sent into the oxygen-eliminating device being positioned at waste gas residual heat boiler 8 side and to be held concurrently low-pressure drum 12 by condensation water heater 36, hold concurrently low-pressure drum 12 of this oxygen-eliminating device carries out water circulation with the low pressure evaporator 25 in the middle part of waste gas residual heat boiler 8, this oxygen-eliminating device low-pressure steam that low-pressure drum 12 collects generation of holding concurrently sends into the low-pressure superheater 22 on waste gas residual heat boiler 8 top, deaerated water is also divided into two-way through feed pump 14 by this oxygen-eliminating device low-pressure drum 12 of holding concurrently: the economizer 38 that waste gas residual heat boiler 8 bottom is sent on a road heats, working-medium water after heating presses drum 13 in sending into, being flow in the middle part of waste gas residual heat boiler 8 by down-comer bottom middle pressure drum 13 presses evaporimeter 24 to be heated generation steam again, steam is sent back to middle pressure drum 13, enter again after carbonated drink is separated in drum 13 be arranged in waste gas residual heat boiler 8 topmost press superheater 21, the economizer 39 that smoke and waste steam boiler 3 bottom is sent into through pressure-reducing valve 15 in another road heats, working-medium water after heating is admitted to the low-pressure drum 40 of smoke and waste steam boiler 3 side, this low-pressure drum 40 carries out water circulation with the evaporimeter 37 in the middle part of smoke and waste steam boiler 3, this low-pressure drum 40 collects the superheater 23 on steam feeding smoke and waste steam boiler 3 top of generation, realizes recycling of working medium.
The pressure value of described middle pressure steam is 2.0MPa, and temperature is 350 DEG C, and the pressure value of low-pressure steam is 0.49MPa, and temperature is 205 DEG C.
Count from sintering machine 1 tail second-to-last heat smoke fairlead 2, each heat smoke fairlead 2 sulfur content is usually less than 400mg/m3, flue-gas temperature is more than 300 DEG C, heat smoke enters the smoke and waste steam boiler 3 being arranged in sintering machine 1 head side after afterbody heat smoke header 26 collects, by appropriate design flue gas fairlead 2, the diameter of heat smoke arm 28 and afterbody heat smoke header 26, by the aperture regulating heat smoke to draw pipe valve 27 and heat smoke manifold valve 29, the flue gas resistance controlling smoke and waste steam boiler 3 heating surface total is less than 800Pa, ensure that smoke and waste steam boiler 3 and flue system drag overall are less than 1200Pa, again by the valve opening of adjustment main exhauster 4, can realize utilizing heat smoke when not establishing Induced fan, in afterbody heat smoke header 26, heat smoke temperature controls at 300 ~ 350 DEG C.Like this, equipment investment and the operating cost of system can be reduced, improve the reliability of system cloud gray model.
Central cooler 1 divides five sections to cool sintering mineral aggregate along the direction that ore bed is lowered the temperature, in one, two cooling section seal closures, EGT is 200 ~ 500 DEG C.Dividing plate is increased respectively in one, two section of seal closure, the demarcation strip that seal closure can be separated into 3 sections is provided with in this section of seal closure, one section of seal closure is provided with three hot waste gas arms 6, the demarcation strip that seal closure can be separated into 2 sections is provided with in these two sections of seal closures, two sections of seal closures are provided with two hot waste gas arms 7, hot waste gas manifold valve 30 is adopted to control each hot waste gas arm 6, the exhaust gas flow of 7, ensure that in seal closure, in one, two section, flue gas pressures is 0 ~ 50Pa, be in slight positive pressure state, avoid cold air to bleed, reduce the outside inleakage of seal closure.
Hot waste gas is through one, two sections of hot waste gas headers 33, 34 send two pressure binary channels waste gas residual heat boiler 8, hot waste gas in one section of hot waste gas header 33 send the first passage of waste gas residual heat boiler 8, hot waste gas in two sections of hot waste gas headers 34 send the second channel of waste gas residual heat boiler 8, one section of hot waste gas converges on top in the boiler with two sections of hot waste gas after the heating surface cooling in waste gas residual heat boiler first passage, together by heating surface at different levels and the back-end ductwork of waste gas residual heat boiler middle and lower part, then export a road through air-introduced machine 9 and send chimney 11, central cooler 5 one sections is sent into through circulating fan 10 in another road, realize recycling of waste gas, heatrejection in one section of seal closure can be brought up to 350 ~ 450 DEG C like this.By adjusting aperture and the waste gas circulation amount of one, two section of hot waste gas manifold valve 30, realize one, two section of hot waste gas header temperature basicly stable, one section of hot waste gas is drawn EGT in header 33 and is controlled at 350 ~ 450 DEG C, two sections of hot waste gas are drawn EGT in header 34 and are controlled at 210 ~ 280 DEG C, can reduce the fluctuation of steam parameter when afterheat generating system runs.
In cogeneration therrmodynamic system, the operating pressure of feed pump 14 is determined according to the operating pressure of the drum of waste gas residual heat boiler 8 and smoke and waste steam boiler 3, is supplied water in the low-pressure drum 40 of smoke and waste steam boiler 3 by pressure-reducing valve 15.The steam parameter of smoke and waste steam boiler 3 is 0.60MPa, 250 DEG C, and waste gas residual heat boiler 8 middle pressure steam parameter is 2.0MPa, 350 DEG C, and low-pressure steam parameter is 0.49MPa, 205 DEG C.Adopt filling condensing turbine group, 2.0MPa middle pressure steam is sent into steam turbine 17 through steam turbine main inlet throttle-stop valve; 0.6MPa low-pressure steam and 0.49MPa low-pressure steam mix collecting header 16, send into steam turbine back segment.In, low-pressure steam through steam turbine 17 do work after condense into water, send waste gas residual heat boiler 8 and smoke and waste steam boiler 3 to recycle.
As in Figure 2-4, in described sintering waste heat generating therrmodynamic system, be also provided with the buffered sources output system on the output being connected to steam turbine generator 18, this buffered sources output system comprises temperature alarm circuit, buffered sources circuit and the battery be connected with this buffered sources circuit or electrical equipment; Described buffered sources circuit is made up of buffer circuit and power circuit again.Can better be suppressed the electric current in circuit and voltage in the moment of power initiation or power-off by buffered sources output system; avoid the excessive curtage of instantaneous variation and damage circuit; also reduce instantaneous power consumption when power initiation or power-off simultaneously; reduce the power attenuation of circuit; better protect the operation of circuit simultaneously, improve the service life of product.By set temperature warning circuit, can be good at monitoring the running temperature of buffered sources output system, can immediately give the alarm when its running temperature is too high, avoid buffered sources output system continue at high temperature to run and cause its circuit damage, substantially increase safety in utilization and the service life of product.
Temperature alarm circuit by triode VT3, triode VT4, triode VT5, amplification chip IC1, time base circuit chip IC 2, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, resistance R20, resistance R21, resistance R22, resistance R23, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, electric capacity C15, triode VT3, triode VT4, triode VT5, slide rheostat RP2, loudspeaker P, Zener diode D4, and inductance L 3 forms.During connection, one end of thermistor RT1 is connected with the IN+ pin of amplification chip IC1, the other end is connected with input, one end of resistance R16 is connected with the IN-pin of amplification chip IC1, the other end is connected with input, resistance R15 is serially connected between the IN-pin of amplification chip IC1 and Vcc-pin, one end of resistance R17 is connected with the IN-pin of amplification chip IC1, the other end is connected with the Vcc-pin of amplification chip IC1 after slide rheostat RP2, the positive pole of electric capacity C10 is connected with input, minus earth, one end of inductance L 3 is connected with the positive pole of electric capacity C10, the other end is connected with the colelctor electrode of triode VT3, one end of resistance R20 is connected with the colelctor electrode of triode VT3, the other end is connected with the colelctor electrode of triode VT4, the P pole of Zener diode D4 is connected with the base stage of triode VT4, N pole is connected with the OFFSET pin of amplification chip IC1 after resistance R18, one end of resistance R19 is connected with the emitter stage of triode VT4, the other end is connected with the emitter stage of triode VT5, one end of resistance R21 is connected with the colelctor electrode of triode VT3, the other end is connected with the Discharge pin of time base circuit chip IC 2, one end of resistance R22 is connected with the Discharge pin of time base circuit chip IC 2, the other end is connected with the Tegger pin of time base circuit chip IC 2, the positive pole of electric capacity C12 is connected with the Tegger pin of time base circuit chip IC 2, minus earth, the positive pole of electric capacity C15 is connected with the Control voltage pin of time base circuit chip IC 2, minus earth, the positive pole of electric capacity C13 is connected with the Output pin of time base circuit chip IC 2, negative pole is connected with the negative pole of electric capacity C15 after loudspeaker P, the positive pole of electric capacity C14 is connected with the positive pole of electric capacity C13, negative pole is connected with the negative pole of electric capacity C15 after resistance R23, the positive pole of electric capacity C11 is connected with the colelctor electrode of triode VT3, minus earth, wherein, the Vcc+ pin of amplification chip IC1 is directly connected with input, the base earth of triode VT3, and the emitter stage of triode VT3 is connected with the base stage of triode VT4, the colelctor electrode of triode VT5 is connected with the PFFSET pin of amplification chip IC1, and the base earth of this triode VT5, the colelctor electrode of triode VT4 is connected with the Reset pin of time base circuit chip IC 2, the Tegger pin of time base circuit chip IC 2 is connected with the Threshold pin of this time base circuit chip IC 2, the GND pin ground connection of time base circuit chip IC 2, the Vcc pin of time base circuit chip IC 2 is connected with the colelctor electrode of triode VT3.The model of amplification chip IC1 is UA741, and the model of time base circuit chip IC 2 is NE555.When temperature is normal, the resistance of thermistor RT1 is lower, and now the IN+ pin of amplification chip IC1 is greater than IN-pin, thus exports high level, and now the Reset pin current potential of time base circuit chip IC 2 is zero thus does not export, and circuit is not reported to the police; When temperature exceedes preset value, the resistance of thermistor RT1 raises, and now the IN+ pin of amplification chip IC1 is less than IN-pin, thus output low level, now the Reset pin current potential of time base circuit chip IC 2 is for " 1 " and then make loudspeaker P place circuit run, and loudspeaker are reported to the police.
Buffer circuit by triode VT1, triode VT2, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, inductance L 1, and inductance L 2 forms.During connection, the positive pole of electric capacity C7 is connected with the colelctor electrode of triode VT1 after resistance R7, negative pole is connected with the base stage of triode VT1, the negative pole of electric capacity C6 is connected with the negative pole of electric capacity C7 after resistance R6, resistance R5 is in parallel with electric capacity C6, one end of inductance L 1 is connected with the positive pole of electric capacity C7, the other end forms input together with the positive pole of electric capacity C6, the plus earth of electric capacity C9, negative pole is connected with the base stage of triode VT2 after resistance R8, one end of resistance R9 is connected with the negative pole of electric capacity C9, the other end is connected with the colelctor electrode of triode VT2, one end of inductance L 2 is connected with the negative pole of electric capacity C7, the other end is ground connection after resistance R14, the positive pole of electric capacity C8 is connected with the emitter stage of triode VT2 after resistance R10, negative pole is connected with the emitter stage of triode VT2 after resistance R11, one end of resistance R12 is connected with the positive pole of electric capacity C8, the other end is connected with the tie point of inductance L 2 with resistance R14, one end of resistance R14 is connected with the positive pole of electric capacity C8, other end ground connection, wherein, the grounded emitter of triode VT1, the colelctor electrode of triode VT1 is connected with the base stage of triode VT2.
Described power circuit is by diode bridge rectifier U1, and transformer T1, resistance R1, resistance R2, resistance R3, resistance R4, slide rheostat RP1, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, diode D1, diode D2, diode D3 form.During connection, the primary coil of transformer T1 is as input, secondary coil two ends are connected with two inputs of diode bridge rectifier U1 respectively, the positive pole of electric capacity C1 is connected with the positive output end of diode bridge rectifier U1 after resistance R1, negative pole is connected with the negative output terminal of diode bridge rectifier U1 after resistance R2, the positive pole of electric capacity C2 is connected with the positive pole of electric capacity C1, negative pole is connected with the negative pole of electric capacity C1 after resistance R3, the N pole of diode D1 is connected with the positive pole of electric capacity C2, P pole is in turn through resistance R4, be connected with the negative pole of electric capacity C2 after slide rheostat RP1, the positive pole of electric capacity C4 is connected with the P pole of diode D1 after diode D2, negative pole is connected with the negative pole of electric capacity C2, the positive pole of electric capacity C3 is connected with the negative pole of electric capacity C1, negative pole is connected with the positive pole of electric capacity C1, the positive pole of electric capacity C5 is connected with the P pole of diode D1, the electric capacity C5 that negative pole is connected with the negative pole of electric capacity C4, the N pole of diode D3 is connected with the positive pole of electric capacity C5, wherein, diode D2 and resistance R4 is arranged in parallel, the negative pole of electric capacity C3 is connected with inductance L 1, the positive pole of electric capacity C3 is connected with the positive pole of electric capacity C6, the positive pole of electric capacity C4 is connected with the negative pole of electric capacity C8, the P pole of diode D3 is connected with the colelctor electrode of triode VT2, and the input of temperature alarm circuit is connected on the positive pole of electric capacity C5.Described triode VT1, triode VT2, triode VT3 and triode VT4 are NPN type triode, and triode VT5 is PNP type triode.
As mentioned above, just the present invention can be realized preferably.
Claims (6)
1. based on the alarm type sintering waste heat generating system of buffered sources circuit, comprise sintering machine heat smoke system, hot waste gas bootstrap system and sintering waste heat generating therrmodynamic system, waste gas residual heat boiler (8) is provided with in hot waste gas bootstrap system, described sintering waste heat generating therrmodynamic system comprises the pressure superheater (21) being arranged in waste gas residual heat boiler (8) top, with the steam turbine (17) of pressing the outlet of superheater (21) to be connected by pipeline in this, be positioned at the low-pressure superheater (22) on waste gas residual heat boiler (8) top, be positioned at the superheater (23) on smoke and waste steam boiler (3) top, header (16) is collected by pipeline communication with the outlet of this low-pressure superheater (22) and superheater (23), filling mouth is by pipeline and the steam turbine (17) collecting header (16) and be connected, be arranged on the steam turbine generator (18) of steam turbine (17) side, be connected in the condenser (19) of the steam drain of steam turbine (17), the condensate pump (20) be connected through pipeline with condenser (19), with be positioned at waste gas residual heat boiler (8) afterbody and the condensation water heater (36) that is connected with condensate pump (20) of import, with the outlet of condensation water heater (36) and the low-pressure drum (12) and the oxygen-eliminating device being positioned at waste gas residual heat boiler (8) side is held concurrently that is connected, with this oxygen-eliminating device hold concurrently low-pressure drum (12) be communicated with and be arranged on waste gas residual heat boiler (8) middle part low pressure evaporator (25), and the hold concurrently upper end of low-pressure drum (12) of import and this oxygen-eliminating device is connected and is arranged on the low-pressure superheater (22) on waste gas residual heat boiler (8) top, wherein, oxygen-eliminating device low-pressure drum (12) lower end of holding concurrently is divided into two-way by pipeline through feed pump (14): lead up to the inlet communication of pressure-reducing valve (15) and the economizer (39) of smoke and waste steam boiler (3) bottom, the outlet of the economizer (39) of this smoke and waste steam boiler (3) is connected with the low-pressure drum (40) of smoke and waste steam boiler (3) side, the evaporimeter (37) at this low-pressure drum (40) and smoke and waste steam boiler (3) middle part is communicated with, this low-pressure drum (40) also with the inlet communication of the superheater (23) on smoke and waste steam boiler (3) top, another road is connected with the import of the economizer (38) of waste gas residual heat boiler (8) bottom, the outlet of the economizer (38) of this waste gas residual heat boiler (8) is communicated with the pressure drum (13) being arranged in waste gas residual heat boiler (8) side, drum (13) is pressed to be communicated with the middle pressure evaporimeter (24) on waste gas residual heat boiler (8) top in this, drum (13) is pressed also to be connected with pressure superheater (21) import being arranged in waste gas residual heat boiler (8) top in this, it is characterized in that, the buffered sources output system on the output being connected to steam turbine generator (18) is also provided with in described sintering waste heat generating therrmodynamic system, this buffered sources output system comprises temperature alarm circuit, buffered sources circuit and the battery be connected with this buffered sources circuit or electrical equipment, described buffered sources circuit is made up of buffer circuit and power circuit again, described temperature alarm circuit is by triode VT3, triode VT4, triode VT5, amplification chip IC1, time base circuit chip IC 2, one end is connected with the IN+ pin of amplification chip IC1, the thermistor RT1 that the other end is connected with input, one end is connected with the IN-pin of amplification chip IC1, the resistance R16 that the other end is connected with input, be serially connected in the resistance R15 between the IN-pin of amplification chip IC1 and Vcc-pin, one end is connected with the IN-pin of amplification chip IC1, the resistance R17 that the other end is connected with the Vcc-pin of amplification chip IC1 after slide rheostat RP2, positive pole is connected with input, the electric capacity C10 of minus earth, one end is connected with the positive pole of electric capacity C10, the inductance L 3 that the other end is connected with the colelctor electrode of triode VT3, one end is connected with the colelctor electrode of triode VT3, the resistance R20 that the other end is connected with the colelctor electrode of triode VT4, P pole is connected with the base stage of triode VT4, the Zener diode D4 that N pole is connected with the OFFSET pin of amplification chip IC1 after resistance R18, one end is connected with the emitter stage of triode VT4, the resistance R19 that the other end is connected with the emitter stage of triode VT5, one end is connected with the colelctor electrode of triode VT3, the resistance R21 that the other end is connected with the Discharge pin of time base circuit chip IC 2, one end is connected with the Discharge pin of time base circuit chip IC 2, the resistance R22 that the other end is connected with the Tegger pin of time base circuit chip IC 2, positive pole is connected with the Tegger pin of time base circuit chip IC 2, the electric capacity C12 of minus earth, positive pole is connected with the Control voltage pin of time base circuit chip IC 2, the electric capacity C15 of minus earth, positive pole is connected with the Output pin of time base circuit chip IC 2, the electric capacity C13 that negative pole is connected with the negative pole of electric capacity C15 after loudspeaker P, positive pole is connected with the positive pole of electric capacity C13, the electric capacity C14 that negative pole is connected with the negative pole of electric capacity C15 after resistance R23, and positive pole is connected with the colelctor electrode of triode VT3, the electric capacity C11 of minus earth forms, wherein, the Vcc+ pin of amplification chip IC1 is directly connected with input, the base earth of triode VT3, and the emitter stage of triode VT3 is connected with the base stage of triode VT4, the colelctor electrode of triode VT5 is connected with the PFFSET pin of amplification chip IC1, and the base earth of this triode VT5, the colelctor electrode of triode VT4 is connected with the Reset pin of time base circuit chip IC 2, the Tegger pin of time base circuit chip IC 2 is connected with the Threshold pin of this time base circuit chip IC 2, the GND pin ground connection of time base circuit chip IC 2, the Vcc pin of time base circuit chip IC 2 is connected with the colelctor electrode of triode VT3.
2. the alarm type sintering waste heat generating system based on buffered sources circuit according to claim 1, it is characterized in that, described buffer circuit is by triode VT1, triode VT2, positive pole is connected with the colelctor electrode of triode VT1 after resistance R7, the electric capacity C7 that negative pole is connected with the base stage of triode VT1, the electric capacity C6 that negative pole is connected with the negative pole of electric capacity C7 after resistance R6, the resistance R5 in parallel with electric capacity C6, one end is connected with the positive pole of electric capacity C7, the other end forms the inductance L 1 of input together with the positive pole of electric capacity C6, plus earth, the electric capacity C9 that negative pole is connected with the base stage of triode VT2 after resistance R8, one end is connected with the negative pole of electric capacity C9, the resistance R9 that the other end is connected with the colelctor electrode of triode VT2, one end is connected with the negative pole of electric capacity C7, the inductance L 2 of other end ground connection after resistance R14, positive pole is connected with the emitter stage of triode VT2 after resistance R10, the electric capacity C8 that negative pole is connected with the emitter stage of triode VT2 after resistance R11, one end is connected with the positive pole of electric capacity C8, the resistance R12 that the other end is connected with the tie point of resistance R14 with inductance L 2, and one end is connected with the positive pole of electric capacity C8, the resistance R14 of other end ground connection forms, wherein, the grounded emitter of triode VT1, the colelctor electrode of triode VT1 is connected with the base stage of triode VT2.
3. the alarm type sintering waste heat generating system based on buffered sources circuit according to claim 2, it is characterized in that, described power circuit is by diode bridge rectifier U1, primary coil is as input, the transformer T1 that secondary coil two ends are connected with two inputs of diode bridge rectifier U1 respectively, positive pole is connected with the positive output end of diode bridge rectifier U1 after resistance R1, the electric capacity C1 that negative pole is connected with the negative output terminal of diode bridge rectifier U1 after resistance R2, positive pole is connected with the positive pole of electric capacity C1, the electric capacity C2 that negative pole is connected with the negative pole of electric capacity C1 after resistance R3, N pole is connected with the positive pole of electric capacity C2, P pole is in turn through resistance R4, the diode D1 be connected with the negative pole of electric capacity C2 after slide rheostat RP1, positive pole is connected with the P pole of diode D1 after diode D2, the electric capacity C4 that negative pole is connected with the negative pole of electric capacity C2, positive pole is connected with the negative pole of electric capacity C1, the electric capacity C3 that negative pole is connected with the positive pole of electric capacity C1, positive pole is connected with the P pole of diode D1, the electric capacity C5 that negative pole is connected with the negative pole of electric capacity C4, the diode D3 that N pole is connected with the positive pole of electric capacity C5, wherein, diode D2 and resistance R4 is arranged in parallel, the negative pole of electric capacity C3 is connected with inductance L 1, the positive pole of electric capacity C3 is connected with the positive pole of electric capacity C6, the positive pole of electric capacity C4 is connected with the negative pole of electric capacity C8, the P pole of diode D3 is connected with the colelctor electrode of triode VT2, and the input of temperature alarm circuit is connected on the positive pole of electric capacity C5.
4. the alarm type sintering waste heat generating system based on buffered sources circuit according to claim 3, is characterized in that, described triode VT1, triode VT2, triode VT3 and triode VT4 are NPN type triode, and triode VT5 is PNP type triode.
5. the sintering waste heat generating system based on voltage-stabilized power supply circuit according to claim 4, it is characterized in that, described sintering machine heat smoke system comprises the many heat smoke fairleads (2) being arranged on sintering machine (1) afterbody, be arranged on heat smoke fairlead (2) other end and the afterbody heat smoke header (26) be communicated with it, be arranged on heat smoke fairlead (2) to go up and heat smoke extraction pipe valve (27) of close afterbody heat smoke header (26) one end, be arranged on the main exhauster (4) of afterbody heat smoke header (26) end, and be arranged on heat smoke arm (28) on heat smoke fairlead (2) and heat smoke manifold valve (29), wherein, the other end of heat smoke arm (28) is communicated with smoke and waste steam boiler (3) by gas approach, and the exhanst gas outlet of smoke and waste steam boiler (3) is communicated with afterbody heat smoke header (26) by waste heat boiler back-end ductwork (35).
6. the sintering waste heat generating system based on voltage-stabilized power supply circuit according to claim 5, it is characterized in that, described hot waste gas bootstrap system comprises and is arranged on one section of seal closure on central cooler (5) and two sections of seal closures, be arranged on the seal closure chimney on one section of seal closure and two sections of seal closures and seal closure chimney valve respectively simultaneously, to be arranged in one section of seal closure and two sections of seal closures and seal closure to be separated into the demarcation strip of 2 ~ 3 sections, be arranged at least one one section hot waste gas arm (6) on one section of seal closure and two sections of seal closures and at least one two sections hot waste gas arms (7), and be arranged on one section of hot waste gas arm (6) and the hot waste gas manifold valve (30) on two sections of hot waste gas arms (7), wherein, the other end of one section of hot waste gas arm (6) and two sections of hot waste gas arms (7) is respectively through one section of hot waste gas header (33), two sections of hot waste gas headers (34) are communicated with waste gas residual heat boiler (8) exhaust gas inlet, the waste gas outlet of waste gas residual heat boiler (8) is connected with air-introduced machine (9) by pipeline, air-introduced machine (9) is also connected with chimney (11) and circulating fan (10) by pipeline, this pipeline is provided with the chimney valve (31) corresponding with chimney (11) and circulating fan valve (32), this circulating fan (10) is also connected with the blast pipe of central cooler (5).
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