CN209706025U - Multi-functional collective-type afterburner combustion system - Google Patents

Abstract

The utility model relates to a kind of multi-functional collective-type afterburner combustion systems, the operation especially suitable for solid fuel therrmodynamic system.System includes that a cylindrical space vertical, with upper cover undertakes continuation and full combustion into flue gas, has tangential air inlet/outlet and uses refractory liner, and and external insulation cooling with air or water；It is characterized in that, it is with several inlet channels (5,7), it can be arranged in top or lower part, can be pooled together from several burners by its flue gas, then further complete the work of therrmodynamic system.And the release of the pressure under anticorrosion, safety dumping and the state of emergency of system may be implemented, while being provided with the cooling system for having fixation pressure and improving the device of temperature.Fuel efficiency can be improved by implementing the utility model and reduce therrmodynamic system operating cost, realize modular designs and manufacture, and convenient adjustment system heat power output can be made and while significantly improving discharge and become a reality.

Description

Multi-functional collective-type afterburner combustion system

Technical field

The utility model relates to the designs of the afterburner of large-scale burner, especially suitable for multiple burner heating power The low emission and safe operation of system.

Background technique

Due to the burning time that the flue gas that straw burning generates needs especially to grow, so needing the after-burning of one very big volume Room.But this volume of general conventional boiler is all not big enough, so the service capacity requirement of therrmodynamic system can not be fully met.

Generally there are biggish combustion chamber and metal heat exchanger by the large-sized boiler of fuel of coal, rubbish or biomass, But due to chemical component complicated in fuel in its combustion process, often furnace body has biggish likelihood of corrosion.People Attempt by selecting preferable furnace body ceramic coating or expanding the volume etc. of combustion chamber, but due to fuel flame length and when burning Between not enough, still can not effectively solve the problems, such as.Especially for straw burning system, even using cyclone firing mode or Using catalyst, effect is also limited.

Using the large-scale heating boiler of solid fuel, under the premise of meeting emission compliance, in response to weather temperature change The ability and range of increase and decrease heat power output are limited.It is further stringent with emission regulations, large-scale combustion system is divided into Several Small Combustion systems just become more and more necessary, while can also thus make further using technologies such as swirl combustions The realization that burning power output can be timely, relatively good in response to weather temperature change must be changed.But it yet there are no using as hereafter The product or technology of combustion system technology.

Swirl combustion is used for straw burning in 2005/040680A1.Though there is small-sized burning wood fuel boiler burning Room introduces gas and uses swirl combustion technology, but does not see while introducing what several different fuel flue gases were mixed and burned After-burning system precedent.

Conventional boiler is usually to be made of clad steel wall, and Inner Wall of Combustion Chamber has ceramic coating, has water between two layers of wall Equal coolants.The furnace body of this structure is since the cooling systems such as water will often have the up to operating pressure of 1.6Mpa, so it is made Valence is often very high, while boiler heat exchanger also makes the operating cost of entire therrmodynamic system higher.

Although traditional Large steam boiler is typically all heat-exchange system by corrosion most serious, someone is had no up to now Heat-exchange system is removed other than conventional boiler.

If necessary to higher heat power output, system needs very big inner space then to ensure that flue gas has enough stops Time but if it will be dangerous for being filled with unburned gas in combustion system, and is solved by setting afterburner combustion system The device of problem above also has not seen.

When the failure of such as blower causes flue gas to block, it is necessary to effectively be kept away by the exhaust gas volumn in reduction system in time When exempting to occur the emergencies such as hypertonia or flue gas leakage.It there are no solution at present to publish.

To reduce therrmodynamic system construction cost, afterburner combustion system should be delivered from factory's complete machine, but be divided into lesser module For road transport then advantageously.It there are no such mode at present and build afterburner combustion system.

Summary of the invention

The purpose of this utility model is to provide a kind of multi-functional collective-type afterburner combustion system, the system can it is sufficiently large but Highway transportation is remained suitable for, which merges together the flue gas of several burners.The utility model will also use pressure The higher water of power directly as coolant, can bear high pressure superheated steam but without special corrosion risk.The utility model It will also be by release flue gas pressures, reduction exhaust gas volumn, even if guaranteeing also to be avoided that system is in an emergency in the power-off state.

The task of the utility model is to solve foregoing problems using special vertical afterburner combustion system described below.

The effect of the utility model afterburner combustion system is to switch combustion system at any time under the premise of not reducing discharge standard. For this purpose, the fuel gas of no less than two fuel elements is pooled to afterburner combustion system and burns away, if one Fuel element is flame-out, this unit may generate gas unburned or that burning is insufficient, if but these gases be caught Then full combustion and discharge standard can not be reduced after into afterburner combustion system.This process work when flame-out unit is lighted a fire again It is the same as principle.The flue gas that the afterburner combustion system of the utility model can collect two or more combustion systems, which continues to complete, to be filled Divided combustion.

The multi-functional collective-type afterburner combustion system of the utility model can allow more than two flue gas streams successively to enter from external Afterburner combustion system, pressure can be generated to air-flow is introduced by entering air-flow afterwards, this pressure can accelerate to be introduced into air-flow in original movement Velocity of displacement on direction, research find this twice for accelerating to can achieve former speed.Since flue gas by raising speed above Journey reaches optimal flow state, to guarantee that flue gas can be completely into afterburner combustion system.

The multi-functional collective-type afterburner combustion system of the utility model includes minimum of one collection channel, this channel can be most Few two air-flows pool together, and it is also possible for equally collecting four air-flows.This channel can be placed according to design requirement The bottom or top of collective-type afterburner combustion system.

Have steel construction sheath outside the multi-functional collective-type afterburner combustion system of the utility model, steel construction sheath ensure even if Stable operation is remained in the case where the multi-functional collective-type afterburner combustion system internal pressure of the utility model improves.

The heat dissipation of the utility model is by completing equipped with the pipeline of coolant liquid, these pipelines are arranged vertically on practical Inside novel afterburner combustion system wall body, pipeline is welded into pipe-bridge-pipe structure as in conventional boiler.This tube-cooled system System can work under any pressure.

The utility model can also by the gap between static load steel plate and weather-proof outer covering layer by surrounding air sucking do into One step is cooling, these are used as air needed for cooling air also acts as burning.

The utility model afterburner combustion system uses suspension type heat exchanger, and it is logical that upper part and bottom respectively have a steam to collect Road is equipped with many superheated steam conduits between upper and lower two channel.All these overheating conduits all good, high temperature resistants, resistance to by thermal conductivity Chemical attack, the profile-followed building block to interlink are fully sealed, one layer of these profile-followed building blocks from metal superheat pipe pass through to Keep metal superheat pipe completely enclosed without directly contacting with burning gases, and another layer is by changing profile-followed blocks shape and direction More solid durable protection wall is formed each other, thus protection such as metal tube within the walls.To the heat transfer of metal superheat pipe Then mainly completed by heat radiation form.This structure can directly contact flue gas to avoid overheated steam pipe, be conducive to extend Live steam pipe service life.Profile-followed building block is preferable using carbofrax material effect.

Relative to the richer rodent gas such as stalk or waste incineration, present invention heat exchanger structure is changed with conventional boiler Hot systems, which are compared, longer service life and more stable heating power performance.With the conventional boiler heat being placed directly in fuel gas Exchanger is compared, and the heat-exchange tube being placed in profile-followed building block can be guaranteed by hot fume longer time, more dense heat radiation Heat exchange is unaffected.In addition tall and big afterburner combustion system of the invention can also have bigger heat-transfer surface than conventional boiler, thus Guarantee sufficiently high heat exchanger effectiveness.If the above profile-followed building block protection wall construction uses molding protection of pipe superheater tube instead, thermally conductive Ability can be further enhanced.

The utility model heat exchanger is attached on the bracket being connected with wall, can be displaced in a certain range.By with On the basis of the firm wall that shape building block package superheater tube is constituted is located at, superheater tube and there are enough gaps to ensure between type wall Superheater tube will not be expressed to wall in the case where maximum thermal expansion.Another road insurance is then to ensure to overheat using limits device The movement of pipe does not exceed the tolerance space between wall and superheater tube.

Regardless of how high steam flow size, temperature be, it will guarantee the steam Uniform Flow by all superheater tubes.The present invention Being equipped with a depressor area on superheater tube input lateral section can make to form a pressure difference inside and outside superheater tube, can guarantee in this way Steam in all pipelines flows approaches uniformity.

The steam inlet and outlet that the utility model links upper and lower steam collection channel heat exchanger tube use opposite arrangement mode, from And the journey length for guaranteeing that steam passes through all heat exchanger tubes is the same.For the performance for changing superheater, the present invention can also be with The stifled refractory brickwork of setting one reduces the heating surface of superheater tube to type on the basis of side apparatus within the walls.

The utility model is equipped with a upper cover, system this upper cover when setting pressure state and operating normally on system top It can be covered by self weight suitable for reading.The Gas phase Smoke ratio generated with natural gas or wood, though the combustible fumes burning velocity of stalk than More slowly it will not cause heavy explosion.But if then system burning is indoor when stalk is due to air-flow or pressure change generation detonation Pressure will be excessively high, and at this time upper cover can be jacked up by pressure along guidance bolt direction and be released the pressure of combustion chamber, presses Power, which is released rear upper cover, to return to original position by self weight along guidance bolt.

When Tthe utility model system operation is in an emergency, system should be disconnected with flue gas immediately, cannot there is any prolong Accidentally.It but is continuous process since burning generates flue gas, so the flue gas that in emergency circumstances must still continue into this system is discongested To prevent blocking.At this time afterburner combustion system of the invention can become flue gas and discongest system or an air chimney. There is a closing device on the upper lid of present system, in emergencies such as gas pressure is excessively high, power failure or system emergency stops When generation, this is closed device and will automatically open, and the flue gas in afterburner combustion system will pass through discharge flue all or part Discharge.If by discharge flue be discharged flue-gas temperature it is excessively high, upper cover open when have air enter mixed with overfire air, Allow flue-gas temperature reach steel bear, the temperature not higher than 600 DEG C.

Since the multi-functional collective-type afterburner combustion system of the utility model can all can exceed that highway transportation in size and weight The upper limit of appropriate gauge.So system, by two parts composition described above, these components can also be together with crane in fabricating yard Convenient movement.

The multi-functional collective-type afterburner combustion system of the utility model by the bottom containing more than one air inlet, contain gas outlet Top and the middle part composition that constitutes of cylindrical body, these parts can be interconnected along central axes, and this structure can satisfy respectively The different designs requirement of kind therrmodynamic system.

Detailed description of the invention

Fig. 1-a is multi-functional collective-type afterburner combustion system principle assumption diagram.

Fig. 1-b is multi-functional collective-type afterburner combustion system bottom sectional view.

Fig. 2-a show multi-functional collective-type afterburner combustion system walled structure top view.

Fig. 2-b show multi-functional collective-type afterburner combustion system walled structure side view.

Fig. 3 is the middle part body of wall structure for being integrated with overheated steam pipe.

Fig. 4 show with fire resisting function with type building block.

Fig. 5-a show multi-functional collective-type afterburner combustion system upper cover side view.

Fig. 5-b show multi-functional collective-type afterburner combustion system upper cover top view.

Fig. 6 show be made of top, middle part and bottom three parts, very high multi-functional collective-type afterburner combustion system.

Fig. 7 show the structure of the utility model safety device.

Fig. 8-a show steam through overheated steam pipe process side view.

Fig. 8-b show steam through overheated steam pipe process top view.

A kind of work that Fig. 9-a, Fig. 9-b, Fig. 9-c show regulating device when flue gas enters inner cavity through inlet channel is former Reason.

Figure 10-a, Figure 10-b show another original that works of regulating device when flue gas enters inner cavity through inlet channel Reason.

In figure: the bottom 1-, the middle part 2-, the top 3-, 4- upper cover, 5- inlet channel, the inner cavity 6-, 7- inlet channel, 8- outlet Channel, 9- ceramic material, 10- thermal insulation layer, 11- support construction, 12- support construction, 13- support construction, 14- mineral wool is heat-insulated, 15- lining, 16- insulating concrete, 17- cooling water pipe, 18- bridge plate, 19- mineral wool, the weather-proof outer covering layer of 20-, 21- cooling water collect Channel, 22- cooling water collection channel, 23- concrete are linked up with, 24- steel plate wall, 25- suspended structure, collect vapour channel, 27- on 26 Next part vapour channel, 28- superheater tube, 29- is with type building block, 30- rock, 31- Equipment Foundations, 32- refractory lining, 33- decompression Area, 34- steam input pipe road, 35- wall, 36- guide bolt, and 37- coal-burning boiler, 38- straw burning system, 39-, which is depressurized, to be filled in, 40- depressor area, 41- pivoting point, 42- hand lever, 43- electromagnet, 44- slide pipe fitting, the safe chimney of 45-, 46- air, 47- Crane boom, 48- bracket, 49- bracket, 50- bracket, 51- bracket, the output of 52- superheater tube steam, 53- regulating device, 54- reduce The cross-section area of nozzle, the maximum cross-section area of nozzle of 55-, 56- hot-blast spray nozzle.

Specific embodiment

The utility model is described in more detail by the following specific embodiment.

Fig. 1 is multi-functional collective-type afterburner combustion system principle assumption diagram.System is by (2) in the middle part of bottom (1), cylindrical body and top Portion's (3) three parts composition, three parts uprightly link.System head is upper cover (4), and the sectional view A-A of bottom (1) is lining Basic structure.Burning gases enter the turbine cyclone channel of afterburner combustion system inner cavity by the inlet channel (5) that section is taper, Inlet channel (7) is also such.Inlet channel quantity can increase to 4 from 2 if necessary.Gas passes through after-burning It is tangentially discharged after burning system from outlet passageway (8), all fiery faces (heating surface) of facing are covered with ceramic material (9) in afterburner combustion system With thermal insulation layer (10).Dynamic, static pressure inside afterburner combustion system is by external steel bushing and support construction (11,12,13) It bears.

Fig. 2 show multi-functional collective-type afterburner combustion system walled structure.Inner chamber body is by the lining that forms with type building block (15) enclose, be after lining one layer for keeping the temperature, thick insulating concrete (16).It is followed by the useful bridge plate (18) of package even The wall of the cooling water pipe (17) connect, then the sheath being made of outward mineral wool (19) and weather-proof outer covering layer (20), in this knot Also there is support function by the metal structure that cooling water pipe (17) and bridge plate (18) form in structure.

Fig. 3 is the middle part body of wall structure for being integrated with overheated steam pipe.Steel plate wall (24) plays stabilization, heat exchanger suspension On fixed frame (25), heat exchanger is made of upper collection vapour channel (26), next part vapour channel (27) and superheater tube (28).These cross device Pipe (28) with type building block (29) package by being located on Equipment Foundations (31).It is all to face fiery face and be covered with refractory material (rock etc.), Upper collection vapour channel (26), next part vapour channel (27) is protected will not directly face fire.

Hang on heat exchanger on bracket (48,49,50,51) can with finite displacement, can to avoid with type building block (29) with The collision of superheater tube (28) and directly contact.

Fig. 4 show with fire resisting function with type building block (29), these building blocks can be embedded in superheater tube by hand (28) between and mutually bonding stratification, is layering and is protected to superheater tube (28) and form rock-steady structure.

In order to obtain best heat transfer effect, carborundum tube can also will be replaced with type building block (29) to protect after burner Superheater tube (28).

As shown in figure 3, steam can be reduced before entering superheater tube (28) through depressor area (33) by cross section, it in this way can band Carry out the pressure difference in next part vapour channel (27) and superheater tube (28) inside, this pressure ensure that steam in all superheater tubes (28) It evenly distributes.

As thermal current movement, from top to bottom or from top to bottom, steam is typically all opposite work done.

As shown in figure 3, steam enters next part vapour channel (27) from figure right side steam input pipe (34), from figure left side and upper collection Vapour channel (26) steam output pipe (52) leaves.Steam passes through all superheater tubes (28) always with identical journey is long in this way.

As shown in figure 8, further illustrate that steam enters from the steam input pipe road (34) for connecting lower dry pipe road (27), from The steam output pipe (52) that dry pipe road (26) are arranged oppositely with steam input pipe road (34) in connection leaves.Pass through institute in this way The steam journey length of overheated steam pipe (28) is all identical.

Fig. 5 show the multi-functional collective-type afterburner combustion system upper cover (4) of the present invention, and upper cover can be with by guidance bolt (36) connection Limited unlatching.When over pressure, upper cover (4) is slowly opened, and overpressure gases are escaped to avoid occurring to discharge system pressure It is dangerous.Upper cover (4) is by the automatic closure of self weight after pressure release.

Fig. 6 show be made of top (3), middle part (2) and bottom (1) three parts, very high multi-functional collective-type after-burning Burning system.The system is sent to coal-burning boiler (37) after can collecting the hot winds of two straw burning systems (38), upper cover (4) Include depressor area (39,40).

Fig. 7 show the structure of safety device of the present invention.Depressor area (40) are equipped in upper cover (4), has in protection zone and subtracts Tamponade (39) closing.Decompression plug (39) is kept closed by electromagnet (43) and depressor area (40).Subtract when if there is power-off Tamponade (39) can land automatically.Decompression plug can only be re-closed by hand lever (42).Upward hot gas is by can be to The adjustable section of jurisdiction (44) of upper sliding flows into safe chimney (45) and mixes with cooling air (46).This safety device is suitable for stopping The various emergencies such as electricity, air-introduced machine failure guarantee system overvoltage security risk, when adjustable section of jurisdiction (44) move up, Crane boom (47) also pull-up and can rotate entire upper cover and enter inner cavity (6) convenient for personnel.

Fig. 9 show flue gas through inlet channel (7) enter inner cavity (6) when regulating device (53) a kind of working principle, Regulating device (53) can reduce air inflow by adjusting the flow area product of inlet channel (7) burning hot-blast spray nozzle (56).It adjusts The position of regulating device (53) is referring also to Fig. 1.

Figure 10 show another original that works of the regulating device (53) when flue gas enters inner cavity (6) through inlet channel (7) Reason adjusts hot-blast spray nozzle by insertion admission line (7) with the regulating device (53) as made of silicon carbide is special grade for refractory materials (56) location drawing of two sectional areas (54,55) formed.

It can be pressurizeed, be accelerated to flue gas by reducing the sectional area (54) of hot-blast spray nozzle (56), mentioned by more dense burning High hot blast temperature can also equally increase hot-blast spray nozzle sectional area (55) and depressurize to flue gas, slow down and reduce hot blast temperature.

Such as every 1KW heating power, hot-blast spray nozzle sectional area are 0.5cm²When hot blast temperature can reach 1000 DEG C.

In system operation, the displacement of regulating device (53) can be realized by control system.

Claims (14)

1. multi-functional collective-type afterburner combustion system, it includes a vertical cylindrical container with upper cover for flue gas after Continuous and full combustion with tangential inlet, outlet and uses ceramic material lining, it is cooling with air or water and with outside every Heat；It is characterized in that, it is with several inlet channels (5,7), it can both be arranged in top, can also be arranged in lower part, lead to Crossing its flue gas can pool together from several burners.

2. multi-functional collective-type afterburner combustion system according to claim 1, which is characterized in that system is by bottom (1), middle part (2) it is formed with top (3) three parts.

3. multi-functional collective-type afterburner combustion system according to claim 1, which is characterized in that flue gas from inlet channel (5, 7) enter multi-functional collective-type afterburner combustion system.

4. multi-functional collective-type afterburner combustion system according to claim 1, which is characterized in that setting is taken out for cooling and heat The cooling water pipe (17) mentioned.

5. multi-functional collective-type afterburner combustion system according to claim 1, which is characterized in that in these superheater tubes (28) In be high temperature super heated steam.

6. multi-functional collective-type afterburner combustion system according to claim 5, which is characterized in that superheater tube (28) it is external by It is wrapped up with type building block (29), silicon carbide (Sic) material can be used with type building block (29).

7. multi-functional collective-type afterburner combustion system according to claim 6, which is characterized in that superheater tube (28) can be with It is placed in carborundum tube.

8. multi-functional collective-type afterburner combustion system according to claim 5, which is characterized in that in all superheater tubes (28) Steam inlet at be equipped with depressor area (33) to generating inside and outside differential pressure.

9. multi-functional collective-type afterburner combustion system according to claim 5, which is characterized in that even with next part vapour channel (27) The steam input pipe road (34) connect and the superheater tube steam output (52) being connected with upper collection vapour channel (26) are arranged oppositely.

10. multi-functional collective-type afterburner combustion system according to claim 5, which is characterized in that after multi-functional collective-type Combustion system inner cavity (6), face fiery face around superheater tube (28) is the wall (35) with type or built with type.

11. multi-functional collective-type afterburner combustion system according to claim 1, which is characterized in that the upper cover (4) of inner cavity (6) Gravity closing inner cavity (6) only are leaned on, upper cover (4) can be shifted up along guidance bolt (36) to a position.

12. multi-functional collective-type afterburner combustion system according to claim 1, which is characterized in that include one in upper cover (4) The depressor area (40) of inner opening and a decompression plug (39), decompression plug (39) are fixed on operating position by electromagnet (43).

13. multi-functional collective-type afterburner combustion system according to claim 5, which is characterized in that superheater pipe (28) movement that may occur will receive the limitation of bracket (48,49,50,51) or system unit.

14. multi-functional collective-type afterburner combustion system according to claim 1, which is characterized in that in the inlet channel (7) into Position before entering inner cavity (6) is equipped with a regulating device (53) for changing pipeline section product.