Summary of the invention
The object of the invention is exactly in order to overcome making a low multiple use of existing in the prior art, the easy contaminated defective of admixtion, the oxy-fuel glass furnace flue gas potential recovery method and the potential retrieving arrangement of proposition.
The technical scheme that the present invention adopts is:
A kind of glass melter flue gas potential recovery method is characterized in that comprising three phases:
Fs: the high-temperature flue gas of drawing in the glass melter is adjusted to 800 ℃~1; 000 ℃; Deliver in the batch preheating decomposer admixtion is carried out the outer preheating decomposition of kiln; Admixtion is heated to 280~608 ℃ from room temperature, temperature≤608 ℃ when flue gas flows out from the preheating decomposer;
Subordinate phase: will through behind the batch preheating decomposer≤608 ℃ flue gas, introduce waste heat boiler through pipeline;
Phase III: after will passing through waste heat boiler≤300 ℃ flue gas, introduce in the gas heat exchanger through pipeline, the combustion-supporting gas that feeds glass melter is heated.
Batch preheating decomposer described in the technique scheme can be following two kinds of devices:
One, grid type heat pipe thermopnore, it comprises:
A, the urceolus that is obliquely installed that can between the 0-25 degree, adjust, the urceolus top and the bottom are provided with opening for feed respectively, venting port and discharge port; A sheathed inner core that is rotatably assorted in the urceolus forms airtight admixtion passage between urceolus and the inner core, the inner core two ends are respectively equipped with hot gas flow and import and export; Inner core both ends inner chamber is respectively equipped with a porose disc; Be respectively equipped with one group of corresponding connecting hole on each porose disc, correspondingly respectively in each connecting hole connect a heat pipe, the inner core front end is provided with gear ring and cooperates with driving toothed gear transmission in the driving mechanism; The hot gas flow import of inner core tail end; Introduce thermal source through high temperature draught fan, thermal source gets into heat pipe through porose disc and batching forms the heat exchange of reverse not contact flow;
The outer wall of b, inner core is provided with flight and cooperates with the admixtion passage, in the process of preheating glass batch, constantly takes up admixtion and promotes admixtion and evenly carry;
C, a steaming out pipe is set the rotating cylinder inwall is cleaned, to keep the exhaust gases passes cleaning unobstructed.
Two, heat pipe fluidizer, it comprises:
A, a hot tube heat exchanger; It comprises outer insulation shell, and one group of high-temperature heat pipe is set in the housing, a dividing plate is set in the housing housing inner chamber is separated into adopts hot-zone and heat release zone; One gas blower is set to link to each other with heat release zone one side through air intake duct; The heat release zone opposite side is connected with the air escape pipe, links to each other adopting hot-zone one side in high-temperature flue gas inlet pipe and the housing, adopts the high-temperature flue gas escape pipe that the hot-zone opposite side connects;
B, a frit preheating fluidized-bed; It comprises the plenum chamber that a bottom angled is provided with; Cullet hopper and glass batch hopper pass through pipe connection respectively on the sidewall of plenum chamber one side; Coarse rack fluidized-bed, the lower floor that the interior upper strata of plenum chamber is provided with an inclination is provided with the fine fack fluidized-bed of an inclination; The high-end corresponding connection of pipeline that is connected with cullet hopper and glass batch hopper respectively of coarse rack fluidized-bed and fine fack fluidized-bed; Through the sidewall outer of plenum chamber opposite side, the plenum chamber top and bottom link to each other with heat release zone outlet pipe and induced draft fan through hot blast inlet pipe, hot blast escape pipe respectively the low side of coarse rack fluidized-bed, fine fack fluidized-bed respectively;
C, the lower end in plenum chamber bottom connect a blanking recovery channel;
D, a cyclonic separator is set above the plenum chamber, the one of which end links to each other with plenum chamber, and the other end links to each other with induced draft fan.
In addition, the needs according to glass melter processing fusing amount adopt grid type heat pipe thermopnore or heat pipe fluidized-bed more than two or two to move simultaneously.
The present invention relates to a kind of admixtion method that preheating is decomposed outside the glass kiln, adopt grid type heat pipe thermopnore or heat pipe fluidized-bed as fs to high-temperature flue gas potential system recoveries.Guarantee that the various feed composition of admixtion stablize under the not stratified prerequisite, utilize high-temperature flue gas with batch preheating in ~ 608 ℃ of entering kilns of 300-, thereby reach again energy-conservation, reduce discharging the purpose that cuts operating costs.The energy that the potential absorption method is used can adopt any medium and high temperature heat energy, comprising the flue gas heat of smelting furnace generation itself.The potential of high-temperature flue gas is meant; Glass kiln all gas fuel; Sweet natural gas, coke-oven gas, producer gas, town gas, coal-seam gas.Liquid fuel; Heavy oil, coal tar, mixed oil.Solid fuel; Fuel such as refinery coke, coal dust adopts the high-temperature flue gas physics heat of the combustion-supporting production of total oxygen.The flue gas physics heat of potential absorption method also comprises employing; The fume afterheat of air, oxygen-enriched combustion-supporting kiln.
" grid type heat pipe thermopnore " that the potential absorption method adopts and the unique device for transporting objects of " heat pipe fluidized-bed " design adjustable guarantee that the admixtion stable feed prevents layering.
" grid type heat pipe thermopnore " and " heat pipe fluidized-bed " that the potential absorption method adopts are provided with special adjusting obliquity mechanism, as the regulating measure of admixtion operational throughput.
Admixtion is accepted heat exchange in the process that tilts, moves downward, pitch angle Ke Zai ⊿ ǎ ≌ 0-25 degree step-less adjustment in " grid type heat pipe thermopnore " and " heat pipe fluidized-bed "; " grid type heat pipe thermopnore " and " heat pipe fluidized-bed " possess the front end function that feeds intake; High-temperature flue gas is provided with special flue system and unit adjusting its flow and temperature;
High-temperature flue gas is in the potential recovery system, and the draft and the necessary special air inducing equipment that lean on the temperature difference to produce are from bottom to top regulated the flue gas rising, in flow process, accomplish the potential exchange;
In " grid type heat pipe thermopnore " and " heat pipe fluidized-bed ", be designed with special exhaust gases passes purge vapor system and regularly purge, to keep the exhaust gases passes cleaning unobstructed;
The liner parts of " grid type heat pipe thermopnore " and " heat pipe fluidized-bed " can carry out suitable, counterclockwise running, and balanced smooth and easy motion blocked not among whole process is to guarantee the admixtion decomposition that outside kiln, heats up;
" grid type heat pipe thermopnore " and " heat pipe fluidized-bed " be (separate unit) operation separately, also can move simultaneously according to two of needs employings or many " the grid type heat pipe thermopnore " and " heat pipe fluidized-bed " of handling the fusing amount;
Liang Tai and the operation scheme more than two have comprised the needs of the backup maintenance of " grid type heat pipe thermopnore " and " heat pipe fluidized-bed ";
The total system of potential absorption method (gets into chimney from exhanst gas outlet to recovery system tail end flue gas and adopts airtight connection; The total system of potential absorption method adopts the insulation enclosed construction, guarantees that to greatest extent the heat abstraction of flue gas physics drops to Schwellenwert.
The potential absorption method also can adopt general charging device afterwards at " grid type heat pipe thermopnore " and " heat pipe fluidized-bed ";
Adopt above technical scheme to have following advantage:
(1) " potential absorption method " changes over " two sections are decomposed melting process " with traditional glass kiln melting process.Significantly promoted the function of melting furnaces.
(2) adopt " grid type heat pipe thermopnore " or " heat pipe fluidized-bed "+full-oxygen combustion process synthesis energy-conservation (fuel, combustion-supporting oxygen) consumption effect remarkable, can reduce the glass melting energy consumption: reach :≤1000 kcal/kg glass.Save energy, minimizing soot emissions;
(3) adopt " potential absorption method " ratio>=55%, glass melting energy consumption :≤860 kcal/kg glass at grog; Can play in flame kiln and the ware glass production horse and use;
(4) adopt potential absorption method " grid type heat pipe thermopnore " or " heat pipe fluidized-bed " fuel economy, combustion-supporting oxygen >=20% again;
(5) adopt " grid type heat pipe thermopnore " or " heat pipe fluidized-bed " can fully reclaim flue gas heat energy.Its recovery thermo-efficiency>high-temperature residual heat generating, capital contribution≤cogeneration;
(6) " potential absorption method " is a kind of effectively energy-conservation again, emission-reduction technology;
(7) adopt glass furnace full-oxygen combustion technology+" potential absorption method ", can reduce the plant produced cost significantly, increase economic efficiency;
(8) adopt " potential absorption method " significantly to promote kiln fusing, clarification function, having shortened the time span (kiln fritting shortening) of admixtion in smelting furnace provides possibility for melting furnaces are energy-conservation again;
(9) adopt potential to reclaim the fritting section that " grid type heat pipe thermopnore " or " heat pipe fluidized-bed " can shorten smelting furnace, reduce the kiln investment;
(10) adopt " grid type heat pipe thermopnore " or " heat pipe fluidized-bed ", admixtion drops into smelting furnace will be reduced by the batch particle (especially alkali) that flame blows mistake significantly;
(11) adopt potential recovery " grid type heat pipe thermopnore " or " heat pipe fluidized-bed " alkali vapor phase to descending, in the total oxygen kiln, lowered erosion the brick material;
(12) heat exchanger time of employing potential absorption method of the present invention " grid type heat pipe thermopnore " or " heat pipe fluidized-bed " admixtion and thermal source can be regulated and control according to melting capacity, and heat exchanger effectiveness is high;
(13) kiln that adopts the present invention's " potential absorption method " can take the mode of many " grid type heat pipe thermopnores " or " heat pipe fluidized-bed " combination to solve the large, medium and small type smelting furnace of different tonnages decomposes outward;
(14) mode of taking many " grid type heat pipe thermopnores " or " heat pipe fluidized-bed " to make up can solve the operating maintenance of " grid type heat pipe thermopnore " or " heat pipe fluidized-bed ", guarantees just usually phase continuous operation of system;
(16) adopting the potential absorption method is that glass dissolves technology and creates new melting process theory and proposed new approaches;
The technical process that patent potential of the present invention reclaims
(17) adopt system's potential absorption method will effectively implement from flue gas high temperature section, temperature on earth the temperature section fully reclaim the physics heat of flue gas, system recoveries high-temperature flue gas potential.
Embodiment
Embodiment one:
As shown in Figure 1, the system that a kind of glass melter flue gas potential recovery method provided by the invention is adopted forms as follows:
Glass melter high-temperature flue gas and other thermal source are passed through the entrance end that pipeline is introduced the batch preheating decomposer; The exit end of batch preheating decomposer is through the pipe connection waste heat boiler; The heat boiler outlet end is through the pipe connection gas heat exchanger, and the gas heat exchanger exit end passes through pipe connection to chimney.
One gas blower is set in addition, Cryogenic air is guided to the entrance end and the exit end of batch preheating decomposer respectively through pipeline, to regulate the temperature that gets into the batch preheating decomposer.
A kind of glass melter flue gas potential recovery method provided by the invention comprises three phases:
Fs: through gas blower; Cryogenic air is guided to the entrance end and the exit end of batch preheating decomposer respectively through pipeline; The high-temperature flue gas of drawing in the glass melter is adjusted to 800 ℃~1,000 ℃, gets in the batch preheating decomposer through pipe-line transportation admixtion is carried out the outer preheating decomposition of kiln; Admixtion is heated to 280~608 ℃ from room temperature, temperature≤608 ℃ when flue gas flows out from the preheating decomposer;
Subordinate phase: will decompose back≤flue gas of 608 ℃ outward through kiln, and introduce waste heat boiler through pipeline, the part steam that waste heat boiler produces is used for the insulation heating;
Phase III: after will passing through waste heat boiler≤300 ℃ flue gas, introduce in the gas heat exchanger through pipeline, the combustion-supporting gas that feeds melting furnaces is heated.Flue gas through gas heat exchanger arrives chimney through discharge of pipes.
With 200t/d level " grid type heat pipe thermopnore " or " heat pipe fluidized-bed " is example; Per hour handle 8.333t/h, PM is handled 0.139t/min, with various material compositions according to [potential absorption method] again charge calculation (for soda-lime glass; Infer wherein three kinds of composition: CaO2, MgO2~+ 0.5%; NaO2~2.5%: will outside kiln, begin to decompose), through the accurate weighing of electronic scales, is transported to mixing machine through belt and mixes.The admixtion that mixes is transported to intermediate bunker and deposits.When waiting to need to use; Use one or more levels conveyor that admixtion is transported to the top that the raw material kiln decomposes " grid type heat pipe thermopnore " or " heat pipe fluidized-bed " device outward; Incoming stock decomposition channels; Isostatic adopts continuous helical to push away, send under mechanism and the action of gravity continuously, keeps the equalization stable of admixtion to tilt to move downward, and the not stratified maintenance mixture homogeneity of admixtion drops to kiln hood insulation feed bin.Before this, heat energy capable of using is like the heat of the high-temperature flue gas that (Sweet natural gas, coke-oven gas, industrial furnace flue gas etc.) or melting furnaces (the combustion-supporting glass kiln of air, oxygen-enriched combustion-supporting kiln or total oxygen) produce; In " grid type heat pipe thermopnore " or " heat pipe fluidized-bed " device exhaust gases passes, get into from bottom, lean on special drainage inlet mouth; Under natural draft effect; Upwards flow and heat admixtion, the temperature of thermal source can be introduced the temperature that suitable air regulation gets into thermal source through the valve that induces one.Both through radiation, conduction heat exchange, reach preheating batch and produce the effect of decomposing therein.Admixtion does not directly contact with flue gas, and is not contaminated to guarantee admixtion.Admixtion goes out after " grid type heat pipe thermopnore " device, and temperature can reach 300 ℃ ~ 600 ℃.The admixtion that preheating is good gets into high-temperature heat-resistance sealing push-press type batch charger through the insulation feed bin and gets into melting furnaces.
Embodiment two:
As shown in Figure 2; Be a kind of batch preheating decomposer provided by the invention---grid type heat pipe thermopnore and melting furnaces system construction drawing; It comprises the admixtion oscillating feeder 1 of melting furnaces framework top, the insulation feed bin 3 and the sealing batch charger 4 of melting furnaces framework below; Sealing batch charger 4 drops into the dog-house 5 of melting furnaces 6 with admixtion, and these all belong to prior art.
One group of grid type heat pipe thermopnore 2 is set in the melting furnaces framework, and each kiln decomposes thermopnore 2 top and the bottom outward and is provided with opening for feed 2a respectively, venting port 2b and discharge port 2c, and they cooperate with oscillating feeder 1 and sealing batch charger 4 respectively.The bottom of grid type heat pipe thermopnore 2 is provided with jointed shaft 2d and cooperates with the melting furnaces framework; The upper articulation of grid type heat pipe thermopnore 2 has lifting hydraulic cylinder 2e; Make grid type heat pipe thermopnore 2 and horizontal plane between angle between the 0-25 degree, adjust, to be applicable to different mobile admixtiones.
Like Fig. 3, shown in 4, grid type heat pipe thermopnore 2 comprises the urceolus that has thermal insulation layer 1 that can between the 0-25 degree, adjust that is obliquely installed; Urceolus 1 top and the bottom are provided with opening for feed 2a respectively, inlet mouth 2b and discharge port 2c, a sheathed inner core that is rotatably assorted 3 in the urceolus; Form airtight admixtion passage 8 between urceolus 1 and the inner core 3, inner core 3 front ends are provided with gear ring 5, it with framework in drive unit in driving toothed gear 6 transmissions cooperate; Inner tank theca is provided with flight 7 and cooperates with admixtion passage 8, and the inner core tail end is provided with hot gas flow import 3a, introduces thermal source through high temperature draught fan; Thermal source gets into heat pipe through porose disc 11 and batching forms the heat exchange of reverse not contact flow.
After using for some time; When dust stratification need clean too much in some grid type heat pipe thermopnore inner cores; Can adopt steam cleaning unit as shown in Figure 5; It is extend in the rotating cylinder by an elongated metal tube 15, and metal tube 15 1 ends are provided with nozzle so that the dust stratification in the rotating cylinder is cleaned through hose connection HP steam, the other end.
Embodiment three:
As shown in Figure 6, be alternative batch preheating decomposer provided by the invention---the structural representation of heat pipe fluidizer, it comprises following two portions:
A, a hot tube heat exchanger, it comprises outer insulation shell 100, and one group of high-temperature heat pipe 200 is set in the housing, a dividing plate 300 is set in the housing housing inner chamber is separated into adopts hot-zone 100a and heat release zone 100b.Housing is provided with a gas blower 400 outward, and it links to each other with the side of heat release zone 100b through air intake duct 600a, and the heat release zone opposite side is connected with air escape pipe 600b.As shown in the figure, in air intake duct 600a, air escape pipe 600b, all be provided with valve.Adopt hot-zone 100a one side in high-temperature flue gas inlet pipe 500a and the housing and link to each other, adopt the high-temperature flue gas escape pipe 500b that the hot-zone opposite side connects, it links to each other with device for generating power by waste heat.Equally, also all be provided with valve among high-temperature flue gas inlet pipe 500a, the high-temperature flue gas escape pipe 500b.
B, a frit preheating fluidizer; It comprises the plenum chamber 120 that a bottom angled is provided with; Cullet hopper 700 and glass batch hopper 800 respectively the pipe connection through separately on a side sidewall of plenum chamber 120; Coarse rack fluidized-bed 130, the lower floor that plenum chamber 120 interior upper stratas are provided with an inclination is provided with the fine fack fluidized-bed 140 of an inclination, coarse rack fluidized-bed 130 and the 140 high-end corresponding connections of pipeline that are connected with cullet hopper and glass batch hopper respectively of fine fack fluidized-bed; Coarse rack fluidized-bed 130, fine fack fluidized-bed 140 are held the sidewall outer of passing through plenum chamber 120 opposite sides respectively.Plenum chamber 120 top and bottom reach with heat release zone outlet pipe 600b and induced draft fan 160 through hot blast inlet pipe 110a, hot blast escape pipe 110b respectively and link to each other, and induced draft fan 160 links to each other with the waste heat boiler device through pipeline.
Described coarse rack fluidized-bed 130, fine fack fluidized-bed 140 are fixed on the sidewall of plenum chamber 120 through anchor 130a, 140a respectively.Coarse rack fluidized-bed, fine fack fluidized-bed promptly are the conveying belt that is similar to a type that adopts the metallic mesh formation of different sizes, and the coarse rack fluidized-bed is used to carry cullet material, fine fack fluidized-bed to be used to carry glass batch.
In addition, connect a blanking recovery channel 170 at the lower end of plenum chamber 120 bottom, right side; A cyclonic separator 150 is set above the plenum chamber 120, and the one of which end links to each other with plenum chamber and hot blast escape pipe 110b, and the other end links to each other with induced draft fan 160.
Principle of work is following: 1000 ℃ ~ 1200 ℃ high-temperature flue gas get in the hot tube heat exchanger adopts hot-zone 100a; Through high-temperature heat pipe 200 these intermediarys; High-temperature flue gas latent heat is passed to the uncontaminated air that feeds in the heat release zone rapidly, efficiently, and uncontaminated air is rapidly heated to 750 ℃ ~ 950 ℃.Clean hot air gets into the plenum chamber 120 of fluidizer under the draft that the temperature difference produces acts on special blast apparatus 400.Warm air rises in the plenum chamber, directly contacts with glass cullet on the coarse rack fluidized-bed 130 with glass batch on the fine fack fluidized-bed 140.Under the effect of hot gas flow, glass batch and glass cullet seethe to the exit downwards along the grid fluidized-bed.In this device; The valve that power through regulating gas blower and hot tube heat exchanger air pass in and out feed channel increases the flow and the speed of warm air in the fluidised bed system; Make when glass batch, glass cullet seethe the intergranular space increase downwards, so with the warm air sufficient heat exchange.When glass batch and glass cullet went out fluidised bed system, its temperature can reach 300 ~ 550 ℃.Drop into kiln after glass batch is preheated to 300 ~ 550 ℃ again, can realize fuel economy 12% ~ 20%.