CN105114940A - Jet flue gas recycling method for preventing spray opening burning loss of secondary reheating boiler - Google Patents
Jet flue gas recycling method for preventing spray opening burning loss of secondary reheating boiler Download PDFInfo
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- CN105114940A CN105114940A CN201510601013.9A CN201510601013A CN105114940A CN 105114940 A CN105114940 A CN 105114940A CN 201510601013 A CN201510601013 A CN 201510601013A CN 105114940 A CN105114940 A CN 105114940A
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Abstract
The invention provides a jet flue gas recycling method for preventing spray opening burning loss of a secondary reheating boiler and relates to a method for adjusting main steam temperature, primary reheating steam temperature and secondary reheating steam temperature of a secondary reheating power plant boiler capable of being used by a thermal power plant safely and economically for a long time. According to the method, a temperature-regulating flue wind spraying nozzle set, a temperature-regulating flue wind connection box, a temperature-regulating flue wind duct, a temperature-regulating wind-flue ejector, an ejector flue gas suction side closing baffle, an ejector heat primary wind adjusting baffle, a heat primary air duct, a multi-hole switch type throttling baffle and a DCS control system are included. By means of the method, the problems that in the prior art, a temperature-regulating system of the secondary reheating power plant boiler does not use a furnace flue recycling fan, and it is difficult for the temperature of a secondary reheating steam outlet to reach the design value under the work condition of 50%-65% BMCR are solved, the distribution uniformity of primary air for cooling in all temperature-regulating flue wind spray nozzles is remarkably improved, and it is guaranteed that the jet flue gas recycling system can operate safely and economically for a long time.
Description
(1) technical field:
Double reheat boiler of the present invention prevent the jet flue gas recirculation method of spout scaling loss relate to a kind of thermal power station can for a long time, the control method of the Stream temperature degree of safety, the economic double reheat station boiler used, single reheat stripping temperature, double reheat stripping temperature.
(2) background technology:
The double reheat station boiler of thermal power station's use of prior art is used for the Turbo-generator Set steam supply to double reheat, and the design load of typical boiler side Stream temperature degree/single reheat stripping temperature/double reheat stripping temperature is 605 DEG C/623 DEG C/623 DEG C.
The Turbo-generator Set of typical double reheat is furnished with level Four high-pressure heater and the steam condenser be separated, and boiler feed temperature is up to 330 DEG C; The inlet temperature of single reheat device and the inlet temperature of secondary reheater are generally at 420 ~ 440 DEG C.
The main steam method of temperature control of prior art: coal-water ratio+spray desuperheating, can guarantee that superheated steam outlet temperature all can reach design load under 30% ~ 100%BMCR operating mode; Reheated steam method of temperature control: gas baffle+tilting burner+spray desuperheating, can guarantee that single reheat steam exit temperature can reach design load under 50% ~ 100%BMCR operating mode; But double reheat steam exit temperature can only can reach design load under 65% ~ 100%BMCR operating mode.
In order to make double reheat steam exit temperature also can reach design load under 50% ~ 65%BMCR operating mode, prior art adopts the recirculation of stove cigarette, the flue gas volume flow in increase, under underload, and the quantity of heat convection increasing secondary reheater is reached.The outlet that the entrance of stove cigarette recirculation blower can be connected on economizer also can be connected on the outlet of deduster, and the outlet of stove cigarette recirculation blower connects burner hearth furnace hopper bottom.When the entrance of stove cigarette recirculation blower is connected on the outlet of economizer, high dust, compared with elevated operating temperature, lower flue gas severe, higher revolutions, the reliability of stove cigarette recirculation blower is reduced, power consumption increases; When the entrance of stove cigarette recirculation blower is connected on the outlet of deduster, air preheater cigarette effluent amount increases by 10% to 20%, and exhaust gas temperature can be caused significantly to raise, and boiler efficiency obviously declines.
It is power with heat primary air that patent of invention " a kind of stove cigarette recirculation thermoregulating system of novel secondary reheating station boiler " describes a kind of, respectively arrange one " temperature adjustment wind-cigarette injector " at the left and right side of double reheat station boiler, the flue gas of injection economizer exit, cigarette wind mixture is through temperature adjustment cigarette wind connects air channel, temperature adjustment cigarette wind header, temperature adjustment cigarette wind nozzle sets enter boiler furnace technical scheme.
The thermoregulating system of the double reheat station boiler of prior art is not if used stove cigarette recirculation blower, and when using easy slagging scorification bituminous coal furnace outlet gas temperature and being lower, under 50% ~ 65%BMCR operating mode, double reheat steam exit temperature is difficult to reach design load; When the entrance of stove cigarette recirculation blower is connected on the outlet of economizer, high dust, compared with elevated operating temperature, lower flue gas severe, higher revolutions, the reliability of stove cigarette recirculation blower is reduced, power consumption increases; When the entrance of stove cigarette recirculation blower is connected on the outlet of deduster, air preheater cigarette effluent amount increases by 10% to 20%, exhaust gas temperature can be caused to raise, boiler efficiency decline; Introducing condensate water from steam turbine side and/or the lower feedwater of temperature carrys out cooled flue gas for reducing exhaust gas temperature, the condensing loss of steam turbine can be increased again, raise the hear rate of steam turbine.
The one that patent of invention " a kind of stove cigarette recirculation thermoregulating system of novel secondary reheating station boiler " is recorded take heat primary air as power, on a left side for double reheat station boiler, right side is each arranges one " temperature adjustment wind-cigarette injector ", the flue gas of injection economizer exit, cigarette wind mixture connects air channel through temperature adjustment cigarette wind, temperature adjustment cigarette wind header, temperature adjustment cigarette wind nozzle sets enters the technical scheme of boiler furnace, because the temperature adjustment cigarette wind nozzle sets be connected with temperature adjustment cigarette wind header is made up of multiple temperature adjustment cigarette wind nozzle, cooling temperature adjustment cigarette wind nozzle sets is gone with micro-First air, temperature adjustment cigarette wind header, when temperature adjustment cigarette wind connects air channel, the flow flowing through each temperature adjustment cigarette wind nozzle in temperature adjustment cigarette wind nozzle sets is likely uneven, the flow of the temperature adjustment cigarette wind nozzle of far-end is greatly abnormal, the flow of the temperature adjustment cigarette wind nozzle of near-end is abnormal little, when extreme, the flow of the temperature adjustment cigarette wind nozzle of near-end is little of 0, even there is high temperature gases recirculating, scaling loss temperature adjustment cigarette wind nozzle, in order to when boiler high load capacity stops using jet flue gas recirculation, the temperature adjustment cigarette wind nozzle that not burning cooling air flow is minimum, certainly will will increase the First air total amount of cooling, improve the First air uniformity of distributing in each temperature adjustment cigarette wind nozzle of cooling, to ensureing that long-term, safety, the economical operation of jet flue gas recirculation system are significant.
Solve the technical scheme that its technical problem adopts:
The object of this invention is to provide a kind of double reheat boiler prevents the jet flue gas recirculation method of spout scaling loss from taking the diverse technology path with prior art, both the thermoregulating system having solved the double reheat station boiler of prior art does not use stove cigarette recirculation blower, and under 50% ~ 65%BMCR operating mode, double reheat steam exit temperature is difficult to the problem reaching design load; The uniformity that the First air significantly improving cooling again distributes in each temperature adjustment cigarette wind nozzle, to ensureing that long-term, safety, the economical operation of jet flue gas recirculation system are significant.
A kind of double reheat boiler of the present invention prevents the jet flue gas recirculation method of spout scaling loss from comprising temperature adjustment cigarette wind nozzle (4), temperature adjustment cigarette wind header (5), and temperature adjustment cigarette wind connects air channel (7), temperature adjustment wind-cigarette injector (9), injector flue gas suction side shutoff baffle plate (8), injector heat primary air controllable register (10), heat primary air road (11), porous switching regulator throttle flap (12), DCS control system; In the boiler, during underload, heat primary air enters temperature adjustment wind-cigarette injector (9) through heat primary air road (11), injector heat primary air controllable register (10), open injector flue gas suction side and turn off baffle plate (8), from Boiler Furnace cigarette outlet port (6) suction boiler economizer (3) front/economizer (3) after flue gas, cigarette wind mixture connects air channel (7) through temperature adjustment cigarette wind, temperature adjustment cigarette wind header (5), porous switching regulator throttle flap (12), temperature adjustment cigarette wind nozzle (4) enter boiler furnace (1); Under temperature adjustment cigarette wind nozzle (4) is arranged in boiler platen superheater (2), 3m to 4m locates, and only changes the ratio of Radiant exothermicity and the quantity of heat convection in burner hearth, increases flue gas volume flow, substantially do not participate in and disturb low nitrogen burning process; When boiler high load capacity, close injector flue gas suction side and turn off baffle plate (8), porous switching regulator throttle flap (12), half-open injector heat primary air controllable register (10) connects air channel (7) scaling loss to avoid temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5), temperature adjustment cigarette wind; DCS control system reaches design load by the aperture of boiler load, double reheat stripping temperature adjustment injector heat primary air controllable register (10) to make double reheat stripping temperature, First air controllable register (10) is opened lower than during 70%BMCR at boiler load, and the weight flow of temperature adjustment cigarette wind mixture is adjustable between 5% to 20% of BMCR flue gas weight flow.
The beneficial effect of the invention:
● the thermoregulating system solving the double reheat station boiler of prior art does not use stove cigarette recirculation blower, under 50% ~ 65%BMCR operating mode, double reheat steam exit temperature is difficult to the problem reaching design load, particularly using easy slagging scorification bituminous coal, when raising furnace outlet gas temperature is restricted;
● when avoiding the entrance of stove cigarette recirculation blower to be connected on the outlet of deduster, air preheater cigarette effluent amount increases by 10% to 20% and causes exhaust gas temperature significantly to raise, and boiler efficiency significantly declines problem;
● cigarette wind mixture temperature is apparently higher than flue-gas temperature after deduster, and temperature adjustment process exergy (fire with) loss reduces;
● increase the thermal capacity of the empty side of air preheater, exhaust gas temperature is downward trend;
● carry out cooled flue gas avoid the condensing loss of steam turbine to increase without the need to introducing condensate water and/or the lower feedwater of temperature from steam turbine side;
● the huge investment of the low-pressure coal saver after the bypass economizer of air preheater and/or preheater can be saved;
● without stove cigarette recirculation blower, save capital expenditure, save station service, resistance to wear, save operation and maintenance cost;
● the flue gas pressure reduction between temperature adjustment cigarette wind nozzle and economizer exit is quite less than the flue gas pressure reduction between boiler furnace hopper bottom and house outlet, and the energy consumption of stove cigarette recirculation required for temperature adjustment greatly reduces;
● avoid low-temperature furnace smoke to enter burner hearth furnace hopper bottom to the interference of low nitrogen burning system;
● the uniformity that the First air significantly improving cooling distributes in each temperature adjustment cigarette wind nozzle, to ensureing that long-term, safety, the economical operation of jet flue gas recirculation system are significant.
(3) summary of the invention:
Technical problem to be solved:
(4) accompanying drawing illustrates:
Fig. 1 is jet flue gas recirculation layout drawing П type stove scheme;
Fig. 2 is jet flue gas recirculation layout drawing tower-type furnace scheme;
Fig. 3 is stove cigarette recirculation thermoregulating system figure (one-sided).
In Fig. 1, Fig. 2, Fig. 3:
1 burner hearth, 2 pendant superheaters,
3 economizers, 4 temperature adjustment cigarette wind nozzles,
5 temperature adjustment cigarette wind headers, 6 stove cigarette outlet ports,
7 temperature adjustment cigarette wind connect air channel, 8 injector flue gas suction sides turn off baffle plate,
9 temperature adjustment wind-cigarette injectors, 10 injector heat primary air controllable registers,
11 heat primary air roads, 12 porous switching regulator throttle flaies.
(5) detailed description of the invention:
Embodiment 1:
Existing composition graphs 1 and Fig. 3, with a 1000MW grade, the design load of Stream temperature degree/single reheat stripping temperature/double reheat stripping temperature is the double reheat П type station boiler of 605 DEG C/623 DEG C/623 DEG C is that example illustrates the preferred embodiment realizing invention.
A kind of double reheat boiler of the present invention prevents the jet flue gas recirculation method of spout scaling loss from comprising temperature adjustment cigarette wind nozzle (4), temperature adjustment cigarette wind header (5), and temperature adjustment cigarette wind connects air channel (7), temperature adjustment wind-cigarette injector (9), injector flue gas suction side shutoff baffle plate (8), injector heat primary air controllable register (10), heat primary air road (11), porous switching regulator throttle flap (12), DCS control system; In the boiler, during underload, heat primary air enters temperature adjustment wind-cigarette injector (9) through heat primary air road (11), injector heat primary air controllable register (10), open injector flue gas suction side and turn off baffle plate (8), from the flue gas that Boiler Furnace cigarette outlet port (6) suction boiler economizer (3) is front, cigarette wind mixture enters boiler furnace (1) through temperature adjustment cigarette wind connection air channel (7), temperature adjustment cigarette wind header (5), porous switching regulator throttle flap (12), temperature adjustment cigarette wind nozzle (4); Under temperature adjustment cigarette wind nozzle (4) is arranged in boiler platen superheater (2), 3m to 4m locates, and only changes the ratio of Radiant exothermicity and the quantity of heat convection in burner hearth, increases flue gas volume flow, substantially do not participate in and disturb low nitrogen burning process; When boiler high load capacity, close injector flue gas suction side and turn off baffle plate (8), porous switching regulator throttle flap (12), half-open injector heat primary air controllable register (10) connects air channel (7) scaling loss to avoid temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5), temperature adjustment cigarette wind; DCS control system reaches design load by the aperture of boiler load, double reheat stripping temperature adjustment injector heat primary air controllable register (10) to make double reheat stripping temperature, First air controllable register (10) is opened lower than during 70%BMCR at boiler load, and the weight flow of temperature adjustment cigarette wind mixture is adjustable between 5% to 20% of BMCR flue gas weight flow.
Temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5) to be arranged in after П type station boiler below water-cooling wall smoke folded angle, apart from 3 to 4m place, pendant superheater (2) bottom, temperature adjustment cigarette wind nozzle (4) is wide uniform along stove; Temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5) are divided into two groups, left and right to be arranged symmetrically with; The cigarette wind mixture outlet peak flow rate (PFR) of temperature adjustment cigarette wind nozzle (4) is no more than 40m/s; Total head liter between the cigarette wind mixture outlet of temperature adjustment wind-cigarette injector (9) and stove cigarette outlet port (6) is no more than 1.5kPa, the blast of the heat primary air nozzle of temperature adjustment wind-cigarette injector (9) is not less than 12kPa, heat primary air can accomplish 1: 4 to the inject ratio of flue gas, and temperature adjustment wind-two, cigarette injector (9) left and right is arranged symmetrically with; The flue gas flow rate of stove cigarette outlet port (6) is no more than 40m/s; Temperature adjustment cigarette wind connects air channel (7) and connects the entrance of temperature adjustment cigarette wind header (5) and the outlet of temperature adjustment wind-cigarette injector (9); Temperature adjustment cigarette wind connects air channel (7) and comprises corrugated-type expansion joint group and elbow; Injector heat primary air controllable register (10) is metal sealing rotation controllable register; DCS control system hardware and generating set share, software is a subsystem of generator set control software, controls injector flue gas suction side and turns off baffle plate (8), the open and close of porous switching regulator throttle flap (12) and the aperture of injector heat primary air controllable register (10).
The similar of porous switching regulator throttle flap (12) is in low pressure big orifice slide valve, it is the hole of uniform many φ about 12mm on flashboard, changing aperture and hole count can effective controlled cooling model air quantity, and on flashboard, the gross area of perforate is about 4% to 8% of temperature adjustment cigarette wind nozzle (4) flow area; When boiler high load capacity, porous switching regulator throttle flap (12) is in and closes position, First air provides necessary cooling air quantity by porous restriction baffle plate, guarantees that temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5), temperature adjustment cigarette wind connect air channel (7) and is not burnt; In the boiler, underload, need with jet flue gas recirculation time, porous switching regulator throttle flap (12) is in open position, and temperature adjustment cigarette wind nozzle (4) runner is unblocked, to obtain inject ratio large as far as possible; Porous switching regulator throttle flap (12) uses heat-resistance stainless steel to make.
Embodiment 2:
Existing composition graphs 2 and Fig. 3, with a 1000MW grade, the design load of Stream temperature degree/single reheat stripping temperature/double reheat stripping temperature is the double reheat tower power station boiler of 605 DEG C/623 DEG C/623 DEG C is that example illustrates the preferred embodiment realizing invention.
A kind of double reheat boiler of the present invention prevents the jet flue gas recirculation method of spout scaling loss from comprising temperature adjustment cigarette wind nozzle (4), temperature adjustment cigarette wind header (5), and temperature adjustment cigarette wind connects air channel (7), temperature adjustment wind-cigarette injector (9), injector flue gas suction side shutoff baffle plate (8), injector heat primary air controllable register (10), heat primary air road (11), porous switching regulator throttle flap (12), DCS control system; In the boiler, during underload, heat primary air enters temperature adjustment wind-cigarette injector (9) through heat primary air road (11), injector heat primary air controllable register (10), open injector flue gas suction side and turn off baffle plate (8), flue gas behind Boiler Furnace cigarette outlet port (6) suction boiler economizer (3), cigarette wind mixture enters boiler furnace (1) through temperature adjustment cigarette wind connection air channel (7), temperature adjustment cigarette wind header (5), porous switching regulator throttle flap (12), temperature adjustment cigarette wind nozzle (4); Under temperature adjustment cigarette wind nozzle (4) is arranged in boiler platen superheater (2), 3m to 4m locates, and only changes the ratio of Radiant exothermicity and the quantity of heat convection in burner hearth, increases flue gas volume flow, substantially do not participate in and disturb low nitrogen burning process; When boiler high load capacity, close injector flue gas suction side and turn off baffle plate (8), porous switching regulator throttle flap (12), half-open injector heat primary air controllable register (10) connects air channel (7) scaling loss to avoid temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5), temperature adjustment cigarette wind; DCS control system reaches design load by the aperture of boiler load, double reheat stripping temperature adjustment injector heat primary air controllable register (10) to make double reheat stripping temperature, First air controllable register (10) is opened lower than during 70%BMCR at boiler load, and the weight flow of temperature adjustment cigarette wind mixture is adjustable between 5% to 20% of BMCR flue gas weight flow.
Temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5) are arranged in tower power station boiler side water-cooling wall pendant superheater (2) below, locate apart from the lower of pendant superheater (2) along 3 to 4m, temperature adjustment cigarette wind nozzle is uniform in side wall level; Temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5) respectively have 2 groups, are arranged symmetrically in left and right sides water-cooling wall respectively; The cigarette wind mixture outlet peak flow rate (PFR) of temperature adjustment cigarette wind nozzle (4) is no more than 40m/s; Total head liter between the cigarette wind mixture outlet of temperature adjustment wind-cigarette injector (9) and stove cigarette outlet port (6) is no more than 2.0kPa, the blast of the heat primary air nozzle of temperature adjustment wind-cigarette injector (9) is not less than 12kPa, heat primary air can accomplish 1: 3 to the inject ratio of flue gas, and temperature adjustment wind-two, cigarette injector (9) left and right is arranged symmetrically with; The flue gas flow rate of stove cigarette outlet port (6) is no more than 40m/s; Temperature adjustment cigarette wind connects the outlet that air channel (7) connects temperature adjustment cigarette wind header (5) and temperature adjustment wind-cigarette injector (9); Temperature adjustment cigarette wind connects air channel (7) and comprises corrugated-type expansion joint group; Injector heat primary air controllable register (10) is metal sealing rotation controllable register; DCS control system hardware and generating set share, software is a subsystem of generator set control software, controls injector flue gas suction side and turns off baffle plate (8), the open and close of porous switching regulator throttle flap (12) and the aperture of injector heat primary air controllable register (10).
The similar of porous switching regulator throttle flap (12) is in low pressure big orifice slide valve, it is the hole of uniform many φ about 12mm on flashboard, changing aperture and hole count can effective controlled cooling model air quantity, and on flashboard, the gross area of perforate is about 4% to 8% of temperature adjustment cigarette wind nozzle (4) flow area; When boiler high load capacity, porous switching regulator throttle flap (12) is in and closes position, First air provides necessary cooling air quantity by porous restriction baffle plate, guarantees that temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5), temperature adjustment cigarette wind connect air channel (7) and is not burnt; In the boiler, underload, need with jet flue gas recirculation time, porous switching regulator throttle flap (12) is in open position, and temperature adjustment cigarette wind nozzle (4) runner is unblocked, to obtain inject ratio large as far as possible; Porous switching regulator throttle flap (12) uses heat-resistance stainless steel to make.
Claims (9)
1. a double reheat boiler prevents the jet flue gas recirculation method of spout scaling loss, it is characterized in that: comprise temperature adjustment cigarette wind nozzle (4), temperature adjustment cigarette wind header (5), temperature adjustment cigarette wind connects air channel (7), temperature adjustment wind-cigarette injector (9), injector flue gas suction side shutoff baffle plate (8), injector heat primary air controllable register (10), heat primary air road (11), porous switching regulator throttle flap (12), DCS control system; In the boiler, during underload, heat primary air enters temperature adjustment wind-cigarette injector (9) through heat primary air road (11), injector heat primary air controllable register (10), open injector flue gas suction side and turn off baffle plate (8), from Boiler Furnace cigarette outlet port (6) suction boiler economizer (3) front/economizer (3) after flue gas, cigarette wind mixture connects air channel (7) through temperature adjustment cigarette wind, temperature adjustment cigarette wind header (5), porous switching regulator throttle flap (12), temperature adjustment cigarette wind nozzle (4) enter boiler furnace (1); Under temperature adjustment cigarette wind nozzle (4) is arranged in boiler platen superheater (2), 3m to 4m locates, and only changes the ratio of Radiant exothermicity and the quantity of heat convection in burner hearth, increases flue gas volume flow, substantially do not participate in and disturb low nitrogen burning process; When boiler high load capacity, close injector flue gas suction side and turn off baffle plate (8), porous switching regulator throttle flap (12), half-open injector heat primary air controllable register (10) connects air channel (7) scaling loss to avoid temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5), temperature adjustment cigarette wind; DCS control system reaches design load by the aperture of boiler load, double reheat stripping temperature adjustment injector heat primary air controllable register (10) to make double reheat stripping temperature, First air controllable register (10) is opened lower than during 70%BMCR at boiler load, and the weight flow of temperature adjustment cigarette wind mixture is adjustable between 5% to 20% of BMCR flue gas weight flow.
2. double reheat boiler according to claim 1 prevents the jet flue gas recirculation method of spout scaling loss, it is characterized in that the similar of described porous switching regulator throttle flap (12) is in low pressure big orifice slide valve, it is the hole of uniform many φ about 12mm on flashboard, changing aperture and hole count can effective controlled cooling model air quantity, and on flashboard, the gross area of perforate is about 4% to 8% of temperature adjustment cigarette wind nozzle (4) flow area; When boiler high load capacity, porous switching regulator throttle flap (12) is in and closes position, First air provides necessary cooling air quantity by porous restriction baffle plate, guarantees that temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5), temperature adjustment cigarette wind connect air channel (7) and is not burnt; In the boiler, underload, need with jet flue gas recirculation time, porous switching regulator throttle flap (12) is in open position, and temperature adjustment cigarette wind nozzle (4) runner is unblocked, to obtain inject ratio large as far as possible; Porous switching regulator throttle flap (12) uses heat-resistance stainless steel to make.
3. double reheat boiler according to claim 1 prevents the jet flue gas recirculation method of spout scaling loss, it is characterized in that described temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5) to be arranged in after Π type station boiler below water-cooling wall smoke folded angle, apart from 3 to 4m place, pendant superheater (2) bottom, temperature adjustment cigarette wind nozzle (4) is wide uniform along stove; Temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5) are divided into two groups, left and right to be arranged symmetrically with; The cigarette wind mixture outlet peak flow rate (PFR) of temperature adjustment cigarette wind nozzle (4) is no more than 40m/s.
4. double reheat boiler according to claim 1 prevents the jet flue gas recirculation method of spout scaling loss, it is characterized in that described temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5) are arranged in tower power station boiler side water-cooling wall pendant superheater (2) below, locate apart from the lower of pendant superheater (2) along 3 to 4m, temperature adjustment cigarette wind nozzle is uniform in side wall level; Temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5) respectively have 2 groups, are arranged symmetrically in left and right sides water-cooling wall respectively; The cigarette wind mixture outlet peak flow rate (PFR) of temperature adjustment cigarette wind nozzle (4) is no more than 40m/s.
5. double reheat boiler according to claim 1 prevents the jet flue gas recirculation method of spout scaling loss, it is characterized in that described temperature adjustment cigarette wind connects air channel (7) and connects the entrance of temperature adjustment cigarette wind header (5) and the outlet of temperature adjustment wind-cigarette injector (9); Temperature adjustment cigarette wind connects air channel (7) and comprises corrugated-type expansion joint group and elbow.
6. double reheat boiler according to claim 1 prevents the jet flue gas recirculation method of spout scaling loss, it is characterized in that described DCS control system hardware and generating set share, software is a subsystem of generator set control software, controls injector flue gas suction side and turns off baffle plate (8), the open and close of porous switching regulator throttle flap (12) and the aperture of injector heat primary air controllable register (10).
7. double reheat boiler according to claim 1 prevents the jet flue gas recirculation method of spout scaling loss, it is characterized in that the flue gas flow rate of described stove cigarette outlet port (6) is no more than 40m/s.
8. double reheat boiler according to claim 1 prevents the jet flue gas recirculation method of spout scaling loss, it is characterized in that described injector heat primary air controllable register (10) is for metal sealing rotation controllable register.
9. double reheat boiler according to claim 1 prevents the jet flue gas recirculation method of spout scaling loss, it is characterized in that described temperature adjustment cigarette wind nozzle (4), porous switching regulator throttle flap (12), temperature adjustment cigarette wind header (5) are divided into two groups, left and right to be arranged symmetrically with.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107327818A (en) * | 2017-08-14 | 2017-11-07 | 西安热工研究院有限公司 | A kind of double reheat П formula boilers of utilization high-low-position flue gas recirculation temperature adjustment |
| CN113108272A (en) * | 2021-05-24 | 2021-07-13 | 西安热工研究院有限公司 | Boiler regulation and control air system for injecting flue gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327818A (en) * | 2017-08-14 | 2017-11-07 | 西安热工研究院有限公司 | A kind of double reheat П formula boilers of utilization high-low-position flue gas recirculation temperature adjustment |
| CN113108272A (en) * | 2021-05-24 | 2021-07-13 | 西安热工研究院有限公司 | Boiler regulation and control air system for injecting flue gas |
| CN113108272B (en) * | 2021-05-24 | 2023-01-31 | 西安热工研究院有限公司 | Boiler regulation and control air system for injecting flue gas |
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