CN101832717B - Kiln tail waste heat boiler with independent economizer and waste heat recovery system - Google Patents
Kiln tail waste heat boiler with independent economizer and waste heat recovery system Download PDFInfo
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- CN101832717B CN101832717B CN2010101568521A CN201010156852A CN101832717B CN 101832717 B CN101832717 B CN 101832717B CN 2010101568521 A CN2010101568521 A CN 2010101568521A CN 201010156852 A CN201010156852 A CN 201010156852A CN 101832717 B CN101832717 B CN 101832717B
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Abstract
The invention provides a kiln tail waste heat boiler with an independent economizer and a waste heat recovery system, wherein the kiln tail waste heat boiler comprises a waste heat boiler body and an independent economizer outside the boiler; a smoke inlet pipe of the independent economizer is connected with a by-pass duct of a raw meal mill, and a smoke outlet pipe of the independent economizer is directly connected with an electric dust collector; an inlet header of the independent economizer is connected with a feed water pump, and an outlet header of the independent economizer is connected with a water inlet pipe of a boiler steam drum of the kiln tail waste heat boiler body or of the economizer of the kiln tail waste heat boiler. In the waste heat recovery system of the kiln tail waste heat boiler containing the independent economizer, a water side of the independent economizer is provided with a by-pass, and the independent economizer can be started and stopped at any time according to the demand of waste heat recovery so as to furthest recover smoke waste heat which cannot be completely utilized when the raw meal mill is run and the smoke waste heat which cannot be utilized when the raw meal mill is stopped and is used for heating and supplying water and improving the waste heat recovery rate of the kiln tail waste heat boiler and the generated energy of the whole system.
Description
Technical field
Low temperature waste gas residual heat boiler technical field in the present invention relates to, particularly a kind of kiln tail waste heat boiler and residual neat recovering system that is used to reclaim the kiln exit gas waste heat of new dry process rotary kiln.
Background technology
Recycle the waste gas residual heat in the clinker production line, generating electricity is the energy-saving and cost-reducing important channel of cement industry, also is a new technology.The fume afterheat heated feed water that middle low temperature waste gas that this techniques make use cooling machine is discharged and kiln tail preheater are discharged produces steam, promotes the Turbo-generator Set generating.The flue gas that the new dry process production line produces is discharged after the kiln tail preheater preheated raw meal; Temperature is up to more than 300 ℃; Some production line feeds this partial fume in the raw mill and is used to dry raw material; But the EGT that is used for the raw material oven dry only needs 190～250 ℃, and visible have a large amount of relative high-grade heats to be wasted, and afterheat generating system utilizes kiln tail waste heat boiler to reclaim this part heat.
Conventional SP boiler erection absorbs the flue gas heat that cement kiln preheaters is discharged after kiln tail preheater, heated feed water is produced steam.Flue gas from the SP fire grate goes out is sent into the oven dry that raw mill is used for raw material again, and therefore, the flue-gas temperature that the SP fire grate goes out has certain requirement, promptly satisfies the needs of raw material oven dry, generally requires EGT between 190-250 ℃.But because the exerting oneself greater than the feed consumption rate of cement kiln of raw mill, therefore, raw mill all will stop to grind several hrs every day, stops during the mill, and the SP stove is still discharged 190-250 ℃ waste gas, this part waste gas emptying after dedusting, and this part heat is all wasted.In addition; Raw mill does not need whole flue gases of cement kiln to dry raw material; Therefore rotary kiln and raw mill all under normal running (operation) conditions, also have the flue gas of part not get into raw mill and emptying, though this part flue gas is few; If but be used, also can improve the generated energy of afterheat generating system to a certain extent.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency that prior art exists; A kind of kiln tail waste heat boiler and residual neat recovering system with separated economizer is provided; Fully reclaim callable residual heat resources, improve waste heat recovery rate and system's generated energy to greatest extent, concrete technical scheme is following.
A kind of kiln tail waste heat boiler with separated economizer; Comprise the kiln tail waste heat boiler body and be positioned at this external separated economizer of kiln tail waste heat boiler; Separated economizer is provided with smoke inlet pipe, smoke outlet tube, inlet header case and outlet collection case; The smoke inlet pipe of separated economizer is connected with the bypass airduct of raw mill; The smoke outlet tube of separated economizer directly is connected with cottrell, and the inlet header case of separated economizer is connected with feed pump, and the outlet collection case of separated economizer is connected with the boiler-steam dome of kiln tail waste heat boiler body or the water inlet pipe of kiln tail waste heat boiler economizer.
The kiln tail waste heat boiler of above-mentioned band separated economizer; Separated economizer inlet header case and separated economizer outlet collection case that said separated economizer comprises the separated economizer shell, is arranged in the separated economizer water pipe of shell and is positioned at the separated economizer two ends; The right ends of separated economizer shell is connected to the smoke inlet pipe of separated economizer and the smoke outlet tube of separated economizer respectively; The end that the smoke inlet pipe of separated economizer shell and separated economizer joins is provided with separated economizer inlet air-valve; The end that the smoke outlet tube of economizer shell and separated economizer joins is provided with separated economizer outlet air-valve; The lower end of separated economizer shell is provided with the leakage ash bucket of separated economizer, and the leakage ash bucket of separated economizer exports out the baiting valve that is provided with separated economizer.
The kiln tail waste heat boiler of above-mentioned band separated economizer; Said kiln tail boiler body comprises the kiln tail boiler body smoke inlet pipe that is positioned at the top; Kiln tail boiler body smoke inlet pipe is provided with kiln tail boiler body inlet air-valve; The bottom of kiln tail boiler body is provided with kiln tail boiler body smoke outlet tube, and kiln tail boiler body smoke outlet tube is provided with kiln tail boiler body outlet air-valve, and kiln tail boiler body bottom is provided with leakage ash bucket; The outlet of leaking ash bucket is connected to the baiting valve of kiln tail boiler body; Kiln tail boiler body inside is provided with superheater and evaporimeter from top to bottom successively, and kiln tail boiler body also is provided with boiler-steam dome outward, and boiler-steam dome is connected with evaporimeter with the superheater of kiln tail boiler body respectively.
The kiln tail waste heat boiler of above-mentioned band separated economizer also comprises the economizer of the kiln tail boiler body that is positioned at evaporimeter below in the kiln tail boiler body, boiler-steam dome is connected with superheater, evaporimeter and the economizer of kiln tail boiler body respectively.
A kind of residual neat recovering system that comprises the kiln tail waste heat boiler of above-mentioned band separated economizer; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, separated economizer, raw mill, feed pump, feed pipe and feed-regulating valve; The delivery outlet of feed pump connects two supply lines; Wherein a supply line is connected with the inlet header case of separated economizer through second feed-regulating valve; Another root supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler; Independent economizer also is provided with the feed water by-pass pipe, converges with feed pipe from the public economizer of kiln hood waste heat boiler after the outlet pipe of this feed water by-pass pipe and independent economizer converges again, and is connected to the water inlet pipe of economizer of the kiln tail boiler body of kiln tail waste heat boiler afterwards; Kiln tail waste heat boiler body smoke inlet pipe is connected with the outlet of kiln tail preheater; Kiln tail boiler body smoke outlet tube is connected with the import of high-temperature blower; The outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the import of independent economizer smoke inlet pipe and raw mill respectively.
A kind of residual neat recovering system that comprises the kiln tail waste heat boiler of above-mentioned band separated economizer; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, separated economizer, raw mill, feed pump, feed pipe and feed-regulating valve; The delivery outlet of feed pump connects two supply lines; Wherein supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler; Another root is the shunt valve of the public economizer of kiln hood waste heat boiler, on the outlet water pipe of the public economizer of kiln hood waste heat boiler the 4th feed-regulating valve is installed; First feed-regulating valve is installed on the shunt valve of public economizer; Shunt valve be connected water main after the outlet water pipe of public economizer compiles; Water main is divided into two-way, second feed-regulating valve wherein is installed on the way and is connected to separated economizer inlet header case; Another road is the shunt valve of separated economizer, and the 3rd feed-regulating valve is installed; After converging, the water pipe of drawing from separated economizer outlet collection case and the shunt valve of separated economizer connect the inlet header case of the economizer of kiln tail waste heat boiler body again; Kiln tail waste heat boiler body smoke inlet pipe is connected with the outlet of kiln tail preheater; Kiln tail boiler body smoke outlet tube is connected with the import of high-temperature blower; The outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the second smoke inlet pipe of independent economizer and the import of raw mill.
A kind of residual neat recovering system that comprises the kiln tail waste heat boiler of above-mentioned band separated economizer; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, separated economizer, feed pump, raw mill, feed pipe and feed-regulating valve; The delivery outlet of feed pump connects two supply lines; Wherein a supply line is connected with the water inlet inlet header case of separated economizer through second control valve; Another root supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler; Independent economizer also is provided with the feed water by-pass pipe, converges with feed pipe from the public economizer of kiln hood waste heat boiler after the outlet pipe of this feed water by-pass pipe and independent economizer converges again, and is connected to the boiler-steam dome of the kiln tail boiler body of kiln tail waste heat boiler afterwards; Kiln tail waste heat boiler body smoke inlet pipe is connected with the outlet of kiln tail preheater; Kiln tail boiler body smoke outlet tube also is connected with the kiln tail preheater outlet; Kiln tail boiler body smoke outlet tube also is connected with the import of high-temperature blower; The outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the second smoke inlet pipe of independent economizer and the import of raw mill.
A kind of residual neat recovering system that comprises the kiln tail waste heat boiler of above-mentioned band separated economizer; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, separated economizer, raw mill, feed pump, feed pipe and feed-regulating valve; The delivery outlet of feed pump connects two supply lines, and wherein supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler, and another root is the shunt valve of the public economizer of kiln hood waste heat boiler; On the outlet water pipe of the public economizer of kiln hood waste heat boiler the 4th feed-regulating valve is installed; First feed-regulating valve is installed on the shunt valve of public economizer, and the outlet water pipe of public economizer and the shunt valve of public economizer compile and connect water main, and water main is divided into two-way before extending to independent economizer; Wherein on one road feed pipe second feed-regulating valve is installed; And be connected with separated economizer inlet header case, another road feed pipe is the shunt valve of separated economizer, on this another road feed pipe the 3rd feed-regulating valve is installed; After converging, the water pipe of drawing from separated economizer outlet collection case and the shunt valve of separated economizer connect the boiler-steam dome of kiln tail waste heat boiler body again; Kiln tail waste heat boiler body smoke inlet pipe is connected with the outlet of kiln tail preheater; Kiln tail boiler body smoke outlet tube also is connected with the kiln tail preheater outlet; Kiln tail boiler body smoke outlet tube also is connected with the import of high-temperature blower; The outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the second smoke inlet pipe of independent economizer and the import of raw mill.
The present invention is in concrete the application, and the flue gas of discharging from the cement kiln end preheater gets into kiln tail boiler body, the superheater of flowing through successively, evaporimeter (and economizer; If any), the flue gas that leaves boiler leads to conditioning Tower through high-temperature blower, and the flue gas of discharging from conditioning Tower has two places to go; One of which; Flue gas feeds raw mill and is used to dry raw material, its two, flue gas feeds separated economizer.Separated economizer is a kind of shell-and-tube heat exchanger, and heat exchange when flue gas is flowed through pipeline, heated feed water are flow through in feedwater in managing.Waste gas behind the oven dry raw material is sent into kiln tail cottrell, and the flue gas of the separated economizer of flowing through is directly sent into kiln tail cottrell.The carbonated drink flow process of the kiln tail waste heat boiler of separated economizer is: the self-supporting water pipe that feeds water is sent into separated economizer, and the economizer (or drum) of kiln tail boiler body is sent in heated feedwater again.Separated economizer water side has bypass, i.e. feedwater can directly get into the economizer (or drum) of kiln tail boiler body without separated economizer.
During the raw mill operate as normal; Supply with oven dry according to the needs of raw mill and use wind, then open airduct valve before the separated economizer, make the lingering remnants of past customs separated economizer of flowing through if any the lingering remnants of past customs; Open (adjusting) separated economizer feed-water valve simultaneously; Make to the water section separated economizer of flowing through, heated feed water has reclaimed the heat of the lingering remnants of past customs.
When raw mill is stopped transport, close oven dry and use the wind air-valve, open airduct air-valve before the separated economizer, all the flue gases separated economizer entering cottrell of flowing through.Open the separated economizer feed-water valve simultaneously, turn down (or closing) from the public economizer of AQC stove to SP boiler economizer supply line valve.The exit gas temperature that passes through the control separated economizer in this process can significantly reclaim waste heat about 100 ℃, improve the generated energy of afterheat generating system.
Compared with prior art, the present invention has following advantage and beneficial effect:
(1) designed the separated economizer that is installed on outside the kiln tail waste heat boiler, be installed on the bypass airduct of raw mill, the heat of whole flue gases when lingering remnants of past customs heat that utilizes fully when recyclable raw mill moves and raw mill are not out of service; Improve the generated energy of afterheat generating system; When raw mill is out of service, whole flue gases separated economizers of flowing through, heating is from the low temperature feedwater of feed pump; Kiln tail boiler economizer or drum are sent in feedwater after the heating again; So can reduce the public economizer of AQC boiler because of heating SP stove feedwater dispersed heat, improve the steam production and the main steam quality of AQC boiler, and then improve system's generated energy; In raw mill when operation, still have the partial fume separated economizer of flowing through, and heating is from the low temperature feedwater of feed pump, or mix from the public economizer of feed pump and AQC stove and to feed water, and it is minimum that the exhaust gas discharged temperature is dropped to, and reclaimed waste heat to greatest extent;
(2) can reclaim the heat of the part waste gas of raw mill when operation discharging, recovery as much as possible system's waste heat, improved system's waste heat recovery rate and system's generated energy;
(3) through separated economizer is set, can reduce flue-gas temperature, both can reduce the injection flow rate of conditioning Tower, can reduce temperature again, alleviate infringement, improve dust removing effects cottrell into the cottrell flue gas.
Description of drawings
Fig. 1 is the structural representation of the kiln tail waste heat boiler of band separated economizer.
Fig. 2 is the separated economizer structure chart shown in Fig. 1.
Fig. 3 is that the kiln tail waste heat boiler of band separated economizer is beamed back the application sketch map in receipts and the electric system in cement kiln system and waste heat.
Fig. 4～Fig. 7 is respectively among the embodiment one to embodiment four and contains in the residual neat recovering system of the kiln tail waste heat boiler of being with separated economizer, kiln hood waste heat boiler, kiln tail waste heat boiler body and separated economizer be connected sketch map.
Among the figure: 1 kiln tail boiler body smoke inlet pipe; 2 kiln tail boiler bodies inlet air-valve; 3 superheaters; 4 evaporimeters; The leakage ash bucket of the economizer 6 kiln tail boiler bodies of 5 kiln tail boiler bodies; The baiting valve of 7 kiln tail boiler bodies; 8 kiln tail boiler body smoke outlet tubes; 9 kiln tail boiler bodies outlet air-valve; 10 boiler-steam domes; 11 first feed-regulating valves; 12 second feed-regulating valves; 13 the 3rd feed-regulating valves; 14 separated economizers inlet air-valve; 15 separated economizer smoke inlet pipes; The leakage ash bucket of 16 separated economizers; The baiting valve of 17 separated economizers; 18 separated economizers outlet collection case; 19 separated economizer water pipes; The outlet air-valve of 20 separated economizers; The smoke outlet tube of 21 separated economizers; The inlet header case of 22 separated economizers; 23 separated economizer shells; 24 the 4th feed-regulating valves; 25 generators; 26 steam turbines; 27 condensers; 28 cottrells; 29 feed pumps; 30 high-temperature blowers; 31 chimneys.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is done further detailed description, but embodiment of the present invention is not limited thereto.
Embodiment one
A kind of kiln tail waste heat boiler and residual neat recovering system with separated economizer in the present embodiment are through designing new kiln tail waste heat boiler and waste heat reclaiming process, recovery waste heat to greatest extent.The kiln tail waste heat boiler of design is as shown in Figure 1, and cigarette wind steam-water pipeline connected mode is as shown in Figure 4, and concrete structure is following:
The kiln tail waste heat boiler of band separated economizer is made up of two parts: kiln tail boiler body and separated economizer.Kiln tail boiler body is made up of the economizer 5 of baiting valve 7, superheater 3, evaporimeter 4 and the kiln tail boiler body of the leakage ash bucket 6 of kiln tail boiler body smoke inlet pipe 1, kiln tail boiler body inlet air-valve 2, kiln tail boiler body smoke outlet tube 8, kiln tail boiler body outlet air-valve 9, kiln tail boiler body, kiln tail boiler body; Separated economizer is then by separated economizer smoke inlet pipe 15; Separated economizer inlet air-valve 14, the leakage ash bucket 16 of separated economizer smoke outlet tube 21, separated economizer outlet air-valve 20, separated economizer, the baiting valve 17 of separated economizer, separated economizer shell 23, separated economizer water pipe 19 are formed.
Separated economizer leads directly on the bypass airduct of cottrell after being installed on conditioning Tower.In the original system, this airduct is the bypass airduct of raw mill, and when promptly raw mill was stopped transport, flue gas this airduct of all flowing through got into cottrell.
Like Fig. 4; The residual neat recovering system that comprises the kiln tail waste heat boiler of being with separated economizer; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, separated economizer, feed pump, feed pipe and feed-regulating valve; The delivery outlet that it is characterized in that feed pump connects two supply line AD, AB; Wherein a supply line is connected with the inlet header case 22 of separated economizer through second control valve 12, and another root supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler, and independent economizer also is provided with feed water by-pass pipe DE; Converge with feed pipe again after the outlet pipe of this feed water by-pass pipe DE and independent economizer converges, be connected to the water inlet pipe of economizer 5 of the kiln tail boiler body of kiln tail waste heat boiler afterwards from the public economizer of kiln hood waste heat boiler; Kiln tail waste heat boiler body smoke inlet pipe 1 is connected with the outlet of kiln tail preheater; Kiln tail boiler body smoke outlet tube 8 also is connected with the kiln tail preheater outlet; Kiln tail boiler body smoke inlet pipe 1 is near the kiln tail preheater end; Kiln tail boiler body smoke outlet tube 8 is connected near the high-temperature blower end and with the import of high-temperature blower, and the outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the second smoke inlet pipe 15 of independent economizer and the import of raw mill.Pipeline AD, BC, the last feed-regulating valve (12,11,13) that is separately installed with of DE.
To this cover residual neat recovering system, the system operation method of formulation is following:
(1) like Fig. 3, Fig. 4, when raw mill is out of service, open separated economizer inlet air-valve 14 and outlet air-valve 20, close the air-valve on the raw mill Gas inlet tube; Progressively the feed-regulating valve 12 on the tube used for bottom pouring AD is turned the feed-regulating valve 11 on the pipe BC down.In the adjustment process, note controlling flue-gas temperature and feed temperature and the steam water-level that leaves separated economizer,, can transfer feed-regulating valve 12 big if the flue-gas temperature of discharging is too high; If steam water-level departs from ordinary water level, can adjust control valve 12 and change feedwater flow with control valve 11, keep boiler normally to move.
(2) when raw mill puts into operation; Open the raw mill exhaust blower, open the air-valve on the raw mill Gas inlet tube, progressively turn down separated economizer inlet air-valve 14 and outlet air-valve 20; Second feed-regulating valve 12 that to manage simultaneously on the AD is turned down, transfers first feed-regulating valve 11 on the pipe BC big.So the process raw mill needs whole waste gas could satisfy the requirement of oven dry; Can close separated economizer; Promptly close the air-valve on separated economizer inlet tube and the outlet, second feed-regulating valve 12 on the blanked-off pipe AD, and first feed-regulating valve 11 that will manage on the BC is transferred big.
Embodiment two
A kind of kiln tail waste heat boiler and residual neat recovering system in the present embodiment with separated economizer; As shown in Figure 5, to compare with embodiment one, its difference is; The kiln tail waste heat boiler body only is provided with superheater and evaporimeter; Corresponding carbonated drink flow process is: two supply lines, and a feed pipe AD from the female pipe of feed pump, another root is from the feed pipe BC of the public economizer exit of AQC stove.Connect the water inlet collection case of separated economizer from the feed pipe of the female pipe of feed pump; And feed water by-pass pipe DE is set; The outlet pipe of independent economizer and shunt valve meet at an E, meet at a C with feed pipe from the public economizer of AQC stove more afterwards, are connected to kiln tail waste heat boiler drum 10 afterwards.
Like Fig. 5; Like Fig. 4; The residual neat recovering system that comprises the kiln tail waste heat boiler of being with separated economizer; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, separated economizer, feed pump, feed pipe and feed-regulating valve, it is characterized in that the delivery outlet of feed pump connects two supply line AD, AB, wherein a supply line is connected with the water inlet inlet header case 22 of separated economizer through second control valve 12; Another root supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler; Independent economizer also is provided with feed water by-pass pipe DE, converges with feed pipe from the public economizer of kiln hood waste heat boiler after the outlet pipe of this feed water by-pass pipe DE and independent economizer converges again, and is connected to the boiler-steam dome 10 of the kiln tail boiler body of kiln tail waste heat boiler afterwards; Kiln tail waste heat boiler body smoke inlet pipe 1 is connected with the outlet of kiln tail preheater; Kiln tail boiler body smoke outlet tube 8 also is connected with the kiln tail preheater outlet; Kiln tail boiler body smoke inlet pipe 1 is near the kiln tail preheater end; Kiln tail boiler body smoke outlet tube 8 is connected near the high-temperature blower end and with the import of high-temperature blower, and the outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the second smoke inlet pipe 15 of independent economizer and the import of raw mill.
The system operation method of this cover residual neat recovering system is identical with embodiment two.
Embodiment three
A kind of kiln tail waste heat boiler and residual neat recovering system in the present embodiment with separated economizer; As shown in Figure 6, to compare with embodiment one, its difference is; Kiln tail waste heat boiler only is provided with a feed pipe CD, but the public economizer of AQC boiler is provided with bypass water pipe AC.Corresponding therewith carbonated drink flow process is: feed pipe is divided into two-way before the public economizer of AQC boiler; One the tunnel is the feed pipe AB that gets into public economizer; Another road; Be above-mentioned public economizer bypass water pipe AC, meet at a C with the feed pipe BC of branch of public economizer exit to SP boiler, before the feed pipe after converging causes separated economizer.Water pipe before the independent economizer divides two-way again, and one the tunnel is the feed pipe DF that connects the water inlet pipe of separated economizer, and another road then is the bypass water pipe DE of separated economizer.The outlet pipe of separated economizer and separated economizer by-pass water pipe meet at an E, are connected to the water inlet pipe of kiln tail waste heat boiler economizer afterwards.
This residual neat recovering system; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, separated economizer, feed pump, feed pipe and feed-regulating valve; The delivery outlet that it is characterized in that feed pump connects two supply line AB, AC; Wherein supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler, and another root is the shunt valve AC of the public economizer of kiln hood waste heat boiler, on the outlet water pipe BC of the public economizer of kiln hood waste heat boiler the 4th feed-regulating valve 24 is installed; First feed-regulating valve 11 is installed on the shunt valve AC of public economizer; Shunt valve AC be connected water main after the outlet water pipe BC of public economizer compiles; Water main is divided into two-way DFE; DE wherein is equipped with second feed-regulating valve 12 on the way and is connected to separated economizer inlet header case 22; Another road is the shunt valve of separated economizer, and the 3rd feed-regulating valve 13 is installed; The water pipe of drawing from separated economizer outlet collection case 14 and the shunt valve of separated economizer meet at an E, and the water pipe after converging connects the inlet header case of the economizer of kiln tail waste heat boiler body again.Kiln tail waste heat boiler body smoke inlet pipe 1 is connected with the outlet of kiln tail preheater; Kiln tail boiler body smoke outlet tube 8 also is connected with the kiln tail preheater outlet; Kiln tail boiler body smoke inlet pipe 1 is near the kiln tail preheater end; Kiln tail boiler body smoke outlet tube 8 is connected near the high-temperature blower end and with the import of high-temperature blower, and the outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the second smoke inlet pipe 15 of independent economizer and the import of raw mill.
Pipe AC, BC, DE, the last feed-regulating valve (seeing 11 among the figure, 24,13,12) of installing respectively of DF.
To this cover residual neat recovering system, the system operation method of formulation is following:
When raw mill is out of service, open separated economizer inlet air-valve 14 and outlet air-valve 20, close the air-valve on the raw mill Gas inlet tube; Progressively the feed-regulating valve 11 on the tube used for bottom pouring AC is turned the feed-regulating valve 24 on the pipe BC down.In the adjustment process; Note controlling flue-gas temperature and feed temperature and the steam water-level that leaves separated economizer; If the flue-gas temperature of discharging is too high, can feed-regulating valve 11 be transferred greatly, if steam water-level departs from ordinary water level; Can adjust control valve 24 and change feedwater flow, keep boiler normally to move with control valve 11.
Embodiment four
A kind of kiln tail waste heat boiler and residual neat recovering system in the present embodiment with separated economizer, as shown in Figure 7, compare with embodiment three; Its difference is; The kiln tail waste heat boiler body only is provided with superheater and evaporimeter, and corresponding carbonated drink flow process is: feed pipe is divided into two-way before the public economizer of AQC boiler, and one the tunnel is the feed pipe AB that gets into public economizer; Another road; Be above-mentioned public economizer bypass water pipe AC, meet at a C with the feed pipe BC of branch of public economizer exit to SP boiler, before the feed pipe after converging causes separated economizer.Water pipe before the independent economizer divides two-way again, and one the tunnel is the feed pipe DF that connects the water inlet pipe of separated economizer, and another road then is the bypass water pipe DE of separated economizer.The outlet pipe of separated economizer and separated economizer by-pass water pipe meet at an E, are connected to the kiln tail waste heat boiler drum afterwards.
Pipe AC, BC, DE, the last feed-regulating valve (seeing 11 among the figure, 24,13,12) of installing respectively of DF.
Residual neat recovering system comprises kiln hood waste heat boiler, kiln tail waste heat boiler body, separated economizer, feed pump, feed pipe and feed-regulating valve; The delivery outlet that it is characterized in that feed pump connects two supply line AB, AC, and wherein supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler, and another root is the shunt valve AC of the public economizer of kiln hood waste heat boiler; On the outlet water pipe BC of the public economizer of kiln hood waste heat boiler the 4th feed-regulating valve 24 is installed; First feed-regulating valve 11 is installed on the shunt valve AC of public economizer, and the outlet water pipe BC of public economizer compiles with, the shunt valve AC of public economizer and connects water main; Water main is divided into two-way DFE before extending to independent economizer; DE wherein is equipped with second feed-regulating valve 12 on one road feed pipe, and is connected with separated economizer inlet header case; Another road feed pipe is the shunt valve of separated economizer, on this another road feed pipe the 3rd feed-regulating valve 13 is installed; After converging, the water pipe of drawing from separated economizer outlet collection case and the shunt valve of separated economizer connect the boiler-steam dome 10 of kiln tail waste heat boiler body again; (outlet of the C1 among Fig. 3～C5) is connected for kiln tail waste heat boiler body smoke inlet pipe 1 and kiln tail preheater; Kiln tail boiler body smoke outlet tube 8 also is connected with the kiln tail preheater outlet; Kiln tail boiler body smoke inlet pipe 1 is near the kiln tail preheater end; Kiln tail boiler body smoke outlet tube 8 is connected near the high-temperature blower end and with the import of high-temperature blower; The outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the second smoke inlet pipe 15 of independent economizer and the import of raw mill.
The system operation method of this cover residual neat recovering system is identical with embodiment three.
Claims (8)
1. kiln tail waste heat boiler with separated economizer; It is characterized in that comprising the kiln tail waste heat boiler body and be positioned at this external separated economizer of kiln tail waste heat boiler; Separated economizer is provided with smoke inlet pipe, smoke outlet tube, inlet header case and outlet collection case; The smoke inlet pipe of separated economizer is connected with the bypass airduct of raw mill; The smoke outlet tube of separated economizer directly is connected with cottrell, and the inlet header case of separated economizer is connected with feed pump, and the outlet collection case of separated economizer is connected with the boiler-steam dome of kiln tail waste heat boiler body or the water inlet pipe of kiln tail waste heat boiler economizer.
2. the kiln tail waste heat boiler of band separated economizer according to claim 1; It is characterized in that separated economizer inlet header case (22) and separated economizer outlet collection case (18) that said separated economizer comprises separated economizer shell (23), is arranged in the separated economizer water pipe (19) of shell and is positioned at the separated economizer two ends; The right ends of separated economizer shell (23) is connected to the smoke inlet pipe (15) of separated economizer and the smoke outlet tube (21) of separated economizer respectively; The end that the smoke inlet pipe (15) of separated economizer shell (23) and separated economizer joins is provided with separated economizer inlet air-valve (14); The end that the smoke outlet tube (21) of separated economizer shell (23) and separated economizer joins is provided with separated economizer outlet air-valve (20); The lower end of separated economizer shell (23) is provided with the leakage ash bucket (16) of separated economizer, and leakage ash bucket (16) exit of separated economizer is provided with the baiting valve (17) of separated economizer.
3. the kiln tail waste heat boiler of band separated economizer according to claim 2; It is characterized in that said kiln tail waste heat boiler body comprises the kiln tail waste heat boiler body smoke inlet pipe (1) that is positioned at the top; Kiln tail waste heat boiler body smoke inlet pipe (1) is provided with kiln tail waste heat boiler body inlet air-valve (2); The bottom of kiln tail waste heat boiler body is provided with kiln tail waste heat boiler body smoke outlet tube (8); Kiln tail waste heat boiler body smoke outlet tube (8) is provided with kiln tail waste heat boiler body outlet air-valve (9); Kiln tail waste heat boiler body bottom is provided with Lou ash bucket (6), and the outlet of leaking ash bucket (6) is connected to the baiting valve (7) of kiln tail waste heat boiler body, and the kiln tail waste heat boiler body interior is provided with superheater (3) and evaporimeter (4) from top to bottom successively; This external boiler-steam dome (10) that also is provided with of kiln tail waste heat boiler, boiler-steam dome (10) is connected with evaporimeter (4) with the superheater (3) of kiln tail waste heat boiler body respectively.
4. the kiln tail waste heat boiler of band separated economizer according to claim 3; It is characterized in that also comprising in the kiln tail waste heat boiler body economizer (5) of the kiln tail waste heat boiler body that is positioned at evaporimeter (4) below, boiler-steam dome (10) is connected with superheater (3), evaporimeter (4) and the economizer (5) of kiln tail waste heat boiler body respectively.
5. residual neat recovering system that comprises the kiln tail waste heat boiler of the said band separated economizer of claim 4; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, raw mill, feed pump, feed pipe and feed-regulating valve; It is characterized in that also comprising separated economizer; The delivery outlet of said feed pump connects two supply lines (AD, AB); Wherein a supply line is connected with the inlet header case (22) of separated economizer through second feed-regulating valve (12); Another root supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler; Separated economizer also is provided with feed water by-pass pipe (DE), converges with feed pipe from the public economizer of kiln hood waste heat boiler after the outlet pipe of this feed water by-pass pipe (DE) and separated economizer converges again, and is connected to the water inlet pipe of economizer (5) of the kiln tail waste heat boiler body of kiln tail waste heat boiler afterwards; Kiln tail waste heat boiler body smoke inlet pipe (1) is connected with the outlet of kiln tail preheater; Kiln tail waste heat boiler body smoke outlet tube (8) also is connected with the kiln tail preheater outlet; Kiln tail waste heat boiler body smoke outlet tube (8) also is connected with the import of high-temperature blower; The outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the import of separated economizer smoke inlet pipe (15) and raw mill respectively.
6. residual neat recovering system that comprises the kiln tail waste heat boiler of the said band separated economizer of claim 4; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, raw mill, feed pump, feed pipe and feed-regulating valve; It is characterized in that also comprising separated economizer; The delivery outlet of said feed pump connects two supply lines (AB, AC); Wherein supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler, and another root is the shunt valve (AC) of the public economizer of kiln hood waste heat boiler, on the outlet water pipe (BC) of the public economizer of kiln hood waste heat boiler the 4th feed-regulating valve (24) is installed; First feed-regulating valve (11) is installed on the shunt valve of public economizer (AC); Shunt valve (AC) be connected water main after the outlet water pipe (BC) of public economizer compiles; Water main is divided into two-way (DFE; DE), second feed-regulating valve (12) and be connected to separated economizer inlet header case (22) wherein is installed on the way; Another road is the shunt valve of separated economizer, and the 3rd feed-regulating valve (13) is installed; After converging, the water pipe of drawing from separated economizer outlet collection case (14) and the shunt valve of separated economizer connect the inlet header case of the economizer of kiln tail waste heat boiler body again; Kiln tail waste heat boiler body smoke inlet pipe (1) is connected with the outlet of kiln tail preheater; Kiln tail waste heat boiler body smoke outlet tube (8) also is connected with the kiln tail preheater outlet; Kiln tail waste heat boiler body smoke outlet tube (8) also is connected with the import of high-temperature blower; The outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the smoke inlet pipe (15) of separated economizer and the import of raw mill.
7. residual neat recovering system that comprises the kiln tail waste heat boiler of the said band separated economizer of claim 3; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, raw mill, feed pump, feed pipe and feed-regulating valve; It is characterized in that also comprising separated economizer; The delivery outlet of said feed pump connects two supply lines (AD, AB); Wherein a supply line is connected with the inlet header case (22) of separated economizer through second feed-regulating valve (12); Another root supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler; Separated economizer also is provided with feed water by-pass pipe (DE), converges with feed pipe from the public economizer of kiln hood waste heat boiler after the outlet pipe of this feed water by-pass pipe (DE) and separated economizer converges again, and is connected to the boiler-steam dome (10) of the kiln tail waste heat boiler body of kiln tail waste heat boiler afterwards; Kiln tail waste heat boiler body smoke inlet pipe (1) is connected with the outlet of kiln tail preheater; Kiln tail waste heat boiler body smoke outlet tube (8) also is connected with the kiln tail preheater outlet; Kiln tail waste heat boiler body smoke outlet tube (8) also is connected with the import of high-temperature blower; The outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the smoke inlet pipe (15) of separated economizer and the import of raw mill.
8. residual neat recovering system that comprises the kiln tail waste heat boiler of the said band separated economizer of claim 3; Comprise kiln hood waste heat boiler, kiln tail waste heat boiler body, raw mill, feed pump, feed pipe and feed-regulating valve; It is characterized in that also comprising separated economizer, the delivery outlet of feed pump connects two supply lines (AB, AC), and wherein supply line connects the inlet header case of the public economizer of kiln hood waste heat boiler; Another root is the shunt valve (AC) of the public economizer of kiln hood waste heat boiler; On the outlet water pipe (BC) of the public economizer of kiln hood waste heat boiler the 4th feed-regulating valve (24) is installed, first feed-regulating valve (11) is installed on the shunt valve of public economizer (AC), the outlet water pipe (BC) of public economizer and the shunt valve (AC) of public economizer compile and connect water main; Water main is divided into two-way (DFE before extending to separated economizer; DE), second feed-regulating valve (12) is installed on one road feed pipe wherein, and is connected with separated economizer inlet header case; Another road feed pipe is the shunt valve of separated economizer, on this another road feed pipe the 3rd feed-regulating valve (13) is installed; After converging, the water pipe of drawing from separated economizer outlet collection case and the shunt valve of separated economizer connect the boiler-steam dome (10) of kiln tail waste heat boiler body again; Kiln tail waste heat boiler body smoke inlet pipe (1) is connected with the outlet of kiln tail preheater; Kiln tail waste heat boiler body smoke outlet tube (8) also is connected with the kiln tail preheater outlet; Kiln tail waste heat boiler body smoke outlet tube (8) also is connected with the import of high-temperature blower; The outlet of high-temperature blower is connected with the import of conditioning Tower, and the outlet of conditioning Tower is connected with the smoke inlet pipe (15) of separated economizer and the import of raw mill.
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| CN2010101568521A CN101832717B (en) | 2010-04-20 | 2010-04-20 | Kiln tail waste heat boiler with independent economizer and waste heat recovery system |
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| CN2010101568521A CN101832717B (en) | 2010-04-20 | 2010-04-20 | Kiln tail waste heat boiler with independent economizer and waste heat recovery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102168921A (en) * | 2011-03-09 | 2011-08-31 | 娄底市兴华有色金属有限公司 | Tubular cooler for cooling flue gases |
| CN102607004A (en) * | 2012-03-21 | 2012-07-25 | 江苏太湖锅炉股份有限公司 | Hydrogen boiler structure |
| CN104236346A (en) * | 2014-10-13 | 2014-12-24 | 阿拉尔新农棉浆有限责任公司 | Heat energy recovery device |
| CN107631287A (en) * | 2017-09-29 | 2018-01-26 | 苏州海陆重工股份有限公司 | The waterworks of boiler economizer |
| CN112679121A (en) * | 2020-12-28 | 2021-04-20 | 安徽海螺集团有限责任公司 | Cement clinker production line with low emission and low energy consumption |
| CN215876789U (en) * | 2021-09-28 | 2022-02-22 | 中国华能集团清洁能源技术研究院有限公司 | Low-temperature desulfurization and denitrification system for flue gas of cement plant |
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| CN201653173U (en) * | 2010-04-20 | 2010-11-24 | 华南理工大学 | Kiln tail waste heat boiler with independent economizer and waste heat recovery system |
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| JP4730393B2 (en) * | 2008-05-07 | 2011-07-20 | 三菱マテリアル株式会社 | CO2 gas recovery method and recovery facility in cement manufacturing facility |
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| US7296994B2 (en) * | 2004-01-21 | 2007-11-20 | Khd Humboldt Wedag Gmbh | Cement clinker production comprising partial removal of a flow of rotary kiln exhaust gas containing harmful substances |
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Application publication date: 20100915 Assignee: XINGSHAN LIANGTE FLOUR CO., LTD. Assignor: South China University of Technology Contract record no.: 2013440000334 Denomination of invention: Kiln tail waste heat boiler with independent economizer and waste heat recovery system Granted publication date: 20120808 License type: Exclusive License Record date: 20130711 |
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