CN117212767A

CN117212767A - Boiler preheating system

Info

Publication number: CN117212767A
Application number: CN202311000474.1A
Authority: CN
Inventors: 高忠义; 郑永峰; 韦巍; 刘振宙; 徐晖; 周勤艳; 薛红明; 周雄伟
Original assignee: Huaneng Suzhou Thermal Power Co ltd
Current assignee: Huaneng Suzhou Thermal Power Co ltd
Priority date: 2023-08-09
Filing date: 2023-08-09
Publication date: 2023-12-12

Abstract

The invention provides a boiler preheating system, which relates to the technical field of boiler appliances and comprises a boiler body, wherein a first smoke outlet pipeline of the boiler body is connected with one end of a boiler preheating device, the boiler preheating device comprises a dust filtering component, and the other end of the boiler preheating device is connected with a smoke treatment device. Through setting up boiler preheating device and dust filter equipment, earlier filter the dust through dust filter equipment, then thereby the flue gas that has heat that produces the boiler through boiler preheating device carries out preheating treatment through effectively utilizing the water in the boiler, and then improved the heat recovery effect of boiler, the consumption of fuel has been reduced, the effectual flue gas that has solved present boiler equipment and has discharged contains the carbon content high, the pollution is big, earlier after through waste heat recovery, rethread filterable mode handles the flue gas, this method makes the heat exchanger surface cover dust granule easily, thereby reduce the technical problem of preheating effect.

Description

Boiler preheating system

Technical Field

The invention relates to the technical field of boiler appliances, in particular to a boiler preheating system.

Background

The boiler is one of the main production equipment of thermal power factory, the main function of boiler is to convert the chemical energy of fuel into heat energy to heat the feedwater with this heat energy, make it have qualified steam of certain quantity and quality, when steam boiler is in producing the vapour operation, when the water gauge shows that its water level is less than normal value, in time to supply water for steam boiler, at this moment supply water for steam boiler is cold water, after the cold water gets into the boiler, lead to the steam boiler temperature to drop sharply, produce the vapour decline, vapour pressure is unstable, influence for production system normal operation, cause production system's output decline, inconvenient use, just need a boiler preheating system to preheat the feedwater at this moment.

The flue gas discharged by the existing boiler equipment is high in carbon content and high in pollution, and the flue gas waste heat recovery device is generally disclosed in CN213335590U, and the flue gas is treated in a filtering mode after waste heat recovery.

Therefore, in view of the above-mentioned current situation, there is an urgent need to develop a boiler preheating system so as to overcome the shortcomings in the current practical applications.

Disclosure of Invention

The invention provides a boiler preheating system, which is used for solving the problems set forth in the background art: the flue gas discharged by the existing boiler equipment is high in carbon content and high in pollution, and the flue gas waste heat recovery device is generally disclosed in CN213335590U, and the flue gas is treated in a filtering mode after waste heat recovery.

In order to solve the technical problems, the invention discloses a boiler preheating system which comprises a boiler body, wherein a first smoke outlet pipeline of the boiler body is connected with one end of a boiler preheating device, the boiler preheating device comprises a dust filtering component, and the other end of the boiler preheating device is connected with a smoke treatment device.

Preferably, the boiler preheating device includes: the first fixing base is characterized in that a dust filtering component and a waste heat recovery component are fixedly installed on the top end of the first fixing base from left to right, and a smoke outlet of the dust filtering component is communicated with a smoke inlet of the waste heat recovery component.

Preferably, the dust filter assembly comprises: the filter case, the filter case left end is connected with go out tobacco pipe one, the filter case right-hand member is connected with waste heat recovery subassembly, just filter case bottom fixed mounting has the dust collecting box, and interval grafting is about a plurality of filter is in the filter case, just filter top fixed mounting has the handle, filter left side bottom is equipped with through-hole one, through-hole one communicates with the dust collecting box, dust collecting box bottom fixed mounting is on unable adjustment base one.

Preferably, the waste heat recovery assembly includes: the waste heat recovery box, waste heat recovery box top fixed mounting has feed liquor pipe one, fixedly mounted has valve one on the feed liquor pipe one, waste heat recovery box inside is equipped with out tobacco pipe two, go out two left ends of tobacco pipe and filter tank outlet port intercommunication, it runs through waste heat recovery box and is connected with flue gas processing apparatus to go out tobacco pipe two right-hand member, and a plurality of heat transfer board one end are pegged graft in waste heat recovery box, the heat transfer board other end is pegged graft in play tobacco pipe two, drain pipe one end with waste heat recovery box bottom intercommunication, the drain pipe other end and boiler body coupling, just be equipped with valve two on the drain pipe.

Preferably, the flue gas treatment device comprises: the treatment box, treatment box bottom fixed mounting is on unable adjustment base is second, just the treatment box from left to right is provided with cavity one, cavity two and cavity three respectively, cavity one bottom is equipped with electrostatic precipitator, electrostatic precipitator input with waste heat recovery subassembly's play cigarette mouth intercommunication, electrostatic precipitator's output and play cigarette pipeline three are connected, play cigarette pipeline three control both ends fixed mounting be in on cavity one inner wall, driving motor fixed mounting is in go out cigarette pipeline two tops on the treatment box, just driving motor's output shaft runs through the treatment box and is connected with the flabellum, just the flabellum sets up in play cigarette pipeline three, go out cigarette pipeline three and cavity two junction fixed mounting have the reverse-flow valve, fixed mounting has gas flow adjustment mechanism on the cavity one top inner wall.

Preferably, the gas flow rate adjustment mechanism includes: the mounting seat is fixedly mounted on the inner wall of the right end of the cavity, the second driving motor is fixedly mounted on the mounting seat, the first belt pulley is fixedly mounted on the output shaft of the second driving motor, the first belt pulley is connected with the second belt pulley through a belt, the second belt pulley is fixedly mounted on the cam, the cam is coaxially and rotatably connected to one end of the limiting rod, the other end of the limiting rod is fixedly mounted on the inner wall of the cavity, the bottom end of the cam is provided with a baffle on the third smoke outlet pipeline, the baffle is vertically and slidably connected in the third smoke outlet pipeline, the top end of the baffle is in contact with the cam, one end of the reset spring is fixedly mounted on the baffle, and the other end of the reset spring is fixedly mounted on the third smoke outlet pipeline.

Preferably, a mixing and stirring mechanism is arranged in the second cavity, and the mixing and stirring mechanism comprises: the third driving motor is fixedly arranged at the bottom end of the second cavity, the output end of the third driving motor penetrates through the partition plate and is connected with the stirring rod, a plurality of stirring blades are fixedly arranged on the stirring rod, the top end of the second cavity is fixedly provided with a smoke exhaust pipe on the treatment box, the second cavity is communicated with the third cavity through the second through hole, and a liquid conveying mechanism is arranged in the third cavity.

Preferably, the liquid delivery mechanism includes: the conveying box is fixedly arranged on the inner wall of the three left sides of the cavity, the other end of the conveying box is fixedly arranged on two supporting rods, the other end of each supporting rod is fixedly arranged on the inner wall of the three right ends of the cavity, the left side of the conveying box is communicated with the second cavity through a second through hole, the top end of the conveying box is fixedly arranged at one end of a first connecting pipe, the other end of the first connecting pipe penetrates through the second cavity to be connected with a plurality of spray heads, the left end of the second connecting pipe is communicated with the conveying box, the other end of the second connecting pipe penetrates through the treatment box, the piston is connected onto the inner wall of the conveying box in an up-down sliding manner, the bottom end of the piston is fixedly arranged at one end of a trapezoid block, the other end of the trapezoid block is in contact with a ball, an inclined plane is arranged on the right side of the trapezoid block, and the height of the inclined plane, which is close to one side of the vertical axis of the piston, is lower than the height of the inclined plane, which is far away from one side of the vertical axis of the piston; the ball swing joint is in the output of cylinder, the fixed end fixed mounting of cylinder is on the three right-hand member inner walls of cavity.

The technical scheme of the invention is further described in detail through the drawings and the embodiments.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure of the point A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged schematic view of the structure of the point B in FIG. 1 according to the present invention;

fig. 4 is an enlarged schematic view of the structure of the C point in fig. 3 according to the present invention.

In the figure: 1. a boiler body; 2. a first smoke outlet pipe; 3. a first fixed base; 4. a filter box; 5. a dust collection box; 6. a filter plate; 7. a grip; 8. a first through hole; 9. a waste heat recovery box; 10. a liquid inlet pipe I; 11. a valve I; 12. a smoke outlet pipeline II; 13. a heat exchange plate; 14. a liquid outlet pipe; 15. a second valve; 16. a treatment box; 17. a first cavity; 18. a second cavity; 19. a cavity III; 20. driving a first motor; 21. a fan blade; 22. a smoke outlet pipeline III; 23. an electrostatic precipitator; 24. a reverse flow valve; 25. a mounting base; 26. a second driving motor; 27. a first belt pulley; 28. a belt pulley II; 29. a cam; 30. a limit rod; 31. a baffle; 32. a return spring; 33. a third driving motor; 34. a partition plate; 35. a stirring rod; 36. stirring blades; 37. a smoke exhaust pipe; 38. a second through hole; 39. a delivery box; 40. a support rod; 41. a first connecting pipe; 42. a spray head; 43. a second connecting pipe; 44. a piston; 45. a trapezoid block; 46. a ball; 47. a cylinder; 48. and a second fixed base.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the invention solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between the embodiments may be combined with each other, but it is necessary to base that a person skilled in the art can implement the combination of technical solutions, when the combination of technical solutions contradicts or cannot be implemented, should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present invention.

The invention provides the following examples

Example 1

The embodiment of the invention provides a boiler preheating system, which is shown in fig. 1, and comprises a boiler body 1, wherein a first smoke outlet pipeline 2 of the boiler body 1 is connected with one end of a boiler preheating device, the boiler preheating device comprises a dust filtering component, and the other end of the boiler preheating device is connected with a smoke treatment device.

Optionally, the boiler preheating device includes: the first fixing base 3, the fixed mounting from left to right in the first fixing base 3 top has dust filtration subassembly and waste heat recovery subassembly, and dust filtration subassembly's play cigarette mouth and waste heat recovery subassembly's income cigarette mouth intercommunication.

The beneficial effects of the technical scheme are as follows: according to the invention, the boiler preheating device is arranged, the flue gas generated by the boiler is fully filtered by the dust filtering component through the operation of the boiler preheating device, and then the heat is transferred to the waste heat recovery component, so that the heat in the flue gas is transferred to water to be supplemented, the heat of the water to be supplemented is improved, and then the preheated water is transferred to the boiler, so that the initial temperature of hot water in the boiler is improved, the use amount of fuel is reduced, and the dust filtering component is detachably connected, so that the replacement treatment of the flue gas is facilitated. The method effectively improves the technical proposal of the background art: the existing boiler preheating device is used for treating the flue gas in a filtering mode after the waste heat is recovered, and the method is easy to enable the surface of the heat exchanger to be covered with dust particles, so that the technical problem of preheating effect is reduced.

Example 2

On the basis of embodiment 1, as shown in fig. 1-2, the boiler preheating device includes: the first fixing base 3, the fixed mounting from left to right in the first fixing base 3 top has dust filtration subassembly and waste heat recovery subassembly, and dust filtration subassembly's play cigarette mouth and waste heat recovery subassembly's income cigarette mouth intercommunication.

Optionally, the dust filtering assembly includes: the filter case 4, the filter case 4 left end is connected with a smoke outlet pipeline 2, the filter case 4 right-hand member is connected with waste heat recovery subassembly, just 4 bottom fixed mounting of filter case has dust collecting box 5, and interval grafting about a plurality of filter 6 is in the filter case 4, just 6 top fixed mounting of filter has handle 7, 6 left side bottom of filter is equipped with a through-hole 8, a through-hole 8 and dust collecting box 5 intercommunication, dust collecting box 5 bottom fixed mounting is on unable adjustment base 3.

Optionally, the waste heat recovery assembly includes: the waste heat recovery box 9, waste heat recovery box 9 top end fixed mounting has feed liquor pipe one 10, fixedly mounted has valve one 11 on the feed liquor pipe one 10, waste heat recovery box 9 inside is equipped with out cigarette pipe two 12, go out cigarette pipe two 12 left end and filter tank 4 play cigarette mouth intercommunication, it is connected with flue gas processing apparatus to go out cigarette pipe two 12 right-hand member and run through waste heat recovery box 9, and a plurality of heat transfer plates 13 one end are pegged graft in waste heat recovery box 9, the heat transfer plate 13 other end is pegged graft in play cigarette pipe two 12, drain pipe 14 one end with waste heat recovery box 9 bottom intercommunication, the drain pipe 14 other end is connected with boiler body 1, just be equipped with valve two 15 on the drain pipe 14.

The working principle of the technical scheme is as follows: when the boiler body 1 needs to be preheated, the first smoke outlet pipeline 2 is connected with the filter box 4, then after the smoke is fully filtered through the two filter plates 6, heat is transferred to water in the waste heat recovery box 9 under the action of the heat exchange plates 13 in the waste heat recovery box 9, so that the water in the waste heat recovery box 9 is heated, finally when the water in the boiler body 1 is used for a certain amount, the second valve 15 is opened, so that the water in the waste heat recovery box 9 is conveyed into the boiler body 1 under the action of the liquid outlet pipe 14, the preheating effect is achieved, when the smoke particles collected on the two filter plates 6 are too much, the smoke particles can fall into the dust collection box 5 through the first through holes 8 under the action of gravity, when the smoke particles on the filter plates 6 are too much, the smoke passing rate is reduced, a user pulls the filter plates 6 upwards through the grip handle 7, and the filter plates 6 are pumped out, and the boiler body is cleaned or replaced.

The beneficial effects of the technical scheme are as follows: by arranging the two filter plates 6, effective filtration of smoke dust particles is facilitated, and excessive smoke dust particles are prevented from adhering to the heat exchange plate 13, so that the preheating effect of the heat exchange plate 13 is reduced; the dust collection box 5 is arranged, so that dust particles collected by the filter plate 6 can be effectively collected, and centralized treatment is performed; the filter plates 6 are inserted into the filter box 4, so that a user can conveniently clean or replace the filter plates 6; the plurality of heat exchange plates 13 are arranged at intervals up and down, so that the path through which the flue gas passes is prolonged, the heat of the flue gas is fully utilized, the heating time of water in the waste heat recovery box 9 is prolonged, the preheating effect is greatly improved, and the water is supplemented through the liquid inlet pipe I10 and the valve I11; by arranging the liquid outlet pipe 14 and the valve II 15, the preheated water is conveniently and practically conveyed into the boiler body 1 through the liquid outlet pipe 14.

Example 3

On the basis of embodiment 1 or 2, as shown in fig. 3 to 4, the flue gas treatment device includes: the treatment box 16, treatment box 16 bottom fixed mounting is on unable adjustment base is second 48, just treatment box 16 from left to right is provided with cavity one 17, cavity two 18 and cavity three 19 respectively, cavity one 17 bottom is equipped with electrostatic precipitator 23 (electrostatic precipitator 23 can refer to CN 106423560A an efficient multilayer electrostatic precipitator), electrostatic precipitator 23 input with waste heat recovery subassembly's play cigarette mouth intercommunication, electrostatic precipitator 23's output and play cigarette pipeline three 22 are connected, go out cigarette pipeline three 22 left and right sides fixed mounting on the cavity one 17 inner wall, driving motor one 20 fixed mounting is in play cigarette pipeline two 12 tops handle on the box 16, just driving motor one 20's output shaft runs through treatment box 16 and flabellum 21 are connected, just flabellum 21 sets up in play cigarette pipeline three 22, play cigarette pipeline three 22 and cavity two 18 junction fixed mounting have counterflow valve 24, fixed mounting has gas flow adjustment mechanism on the cavity one 17 inner wall top.

Optionally, the gas flow regulating mechanism includes: the installation seat 25, installation seat 25 fixed mounting is in on the inner wall of cavity one 17 right-hand member, just fixed mounting has driving motor two 26 on the installation seat 25, driving motor two 26's output shaft fixed mounting has belt pulley one 27, belt pulley one 27 passes through the belt and is connected with belt pulley two 28, belt pulley two 28 fixed mounting is on cam 29, cam 29 coaxial rotation connects in gag lever post 30 one end, gag lever post 30 other end fixed mounting is on cavity one 17 inner wall, the cam 29 bottom go out and be equipped with baffle 31 on the cigarette pipeline three 22, baffle 31 from top to bottom sliding connection is in the cigarette pipeline three 22, just baffle 31 top and cam 29 contact, reset spring 32 one end fixed mounting is on baffle 31, reset spring 32 other end fixed mounting is on the cigarette pipeline three 22.

Optionally, a mixing and stirring mechanism is disposed in the second cavity 18, and the mixing and stirring mechanism includes: the third driving motor 33, the fixed end of the third driving motor 33 is fixedly arranged at the bottom end of the second cavity 18, the output end of the third driving motor 33 penetrates through the partition 34 and is connected with the stirring rod 35, a plurality of stirring blades 36 are fixedly arranged on the stirring rod 35, a smoke exhaust pipe 37 is fixedly arranged on the treatment box 16 at the top end of the second cavity 18, the second cavity 18 is communicated with the third cavity 19 through a second through hole 38, and a liquid conveying mechanism is arranged in the third cavity 19.

Optionally, the liquid delivery mechanism includes: the conveying box 39, one end of the conveying box 39 is fixedly mounted on the left inner wall of the cavity III 19, the other end of the conveying box 39 is fixedly mounted on two supporting rods 40, the other end of each supporting rod 40 is fixedly mounted on the right inner wall of the cavity III 19, the left side of the conveying box 39 is communicated with the cavity II 18 through a through hole II 38, the top end of the conveying box 39 is fixedly mounted at one end of a connecting pipe I41, the other end of the connecting pipe I41 penetrates through the cavity II 18 to be connected with a plurality of spray heads 42, the left end of the connecting pipe II 43 is communicated with the conveying box 39, the other end of the connecting pipe II 43 penetrates through the processing box 16, the piston 44 is connected on the inner wall of the conveying box 39 in an up-down sliding manner, the bottom end of the piston 44 is fixedly mounted at one end of a trapezoid block 45, the other end of the trapezoid block 45 is in contact with a ball 46, the right side of the trapezoid block 45 is provided with an inclined plane, and the height of the inclined plane, which is close to one side of the vertical axis of the piston 44, is lower than the height of the inclined plane, which is far away from the vertical axis of the piston 44; the ball 46 is movably connected to the output end of the air cylinder 47, and the fixed end of the air cylinder 47 is fixedly arranged on the inner wall of the right end of the cavity III 19.

The working principle of the technical scheme is as follows: when toxic gas in the flue gas needs to be treated, firstly, the chemical agent is conveyed into the conveying box 39 through the second connecting pipe 43, then the air cylinder 47 is started, the air cylinder 47 moves left and right to drive the trapezoidal block 45 to move up and down, so that under the action of pressure, the chemical agent is conveyed into the second cavity 18, when a certain amount of the chemical agent reaches, the conveying of the second connecting pipe 43 is stopped, then the driving motor III 33 is started, the driving motor III 33 rotates to drive the stirring rod 35 and the stirring blade 36 to rotate, then the static dust remover 23 is started, the electrostatic dust remover 23 effectively removes dust from the flue gas entering through the first connecting pipe 12, then the flue gas after dust removal is conveyed into the first connecting pipe 22, then the driving motor I20 rotates to drive the fan blade 21 to rotate, so that the conveying of the flue gas is accelerated, the driving motor II 26 is started, the driving motor II 26 rotates to drive the belt pulley 27 to rotate, the belt pulley II 28 and the cam 29 connected with the belt of the belt pulley II, the cam 29 rotates to drive the baffle 31 to move down, so that the chemical agent is controlled to be conveyed into the second cavity 18, the chemical agent is conveyed into the second cavity 18, the second cavity 18 is further discharged into the flue gas through the second connecting pipe 18, the flue gas after the flue gas is fully discharged from the first connecting pipe 18, the flue gas is fully, the flue gas is discharged from the flue gas through the first connecting pipe, and finally, the flue gas is fully discharged from the flue gas is fully, and the flue gas is fully reacted, and fully, and finally, the flue gas is discharged from the flue gas is reacted through the flue gas is discharged through the nozzle through the first connecting pipe, and the flue gas through the reaction box, and finally, the flue gas is fully.

The beneficial effects of the technical scheme are as follows: by arranging the first driving motor 20 and the fan blades 21, the flue gas conveying speed is improved under the action of the fan blades 21; the electrostatic dust collector 23 is arranged, so that dust particles in the flue gas can be effectively collected, the purity of the gas conveyed into the second cavity 18 is improved, dust is prevented from entering the second cavity 18, and the reaction liquid in the second cavity 18 is prevented from being polluted; by arranging the gas flow regulating mechanism, the amount of the smoke entering the second cavity 18 is favorably controlled, so that the smoke entering the second cavity 18 is prevented from being excessive, and the reaction is insufficient; by arranging the mixing and stirring mechanism, the reaction liquid in the second cavity 18 is favorably stirred, so that the reaction rate is improved; by arranging the countercurrent valve 24, the backflow of the reaction liquid into the third smoke outlet pipeline 22 is prevented; by arranging the plurality of spray heads 42, the reaction liquid flowing in through the second through holes 38 is favorably conveyed into the second cavity 18 under the action of pressurization, so that unreacted gas in the air of the second cavity 18 is fully contacted, and the reaction effect is improved; through setting up cylinder 47, be favorable to driving trapezoidal piece 45 and reciprocate under the effect of cylinder 47 to realize the transport to the reaction liquid, very convenient and practical.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The boiler preheating system is characterized by comprising a boiler body (1), wherein a first smoke outlet pipeline (2) of the boiler body (1) is connected with one end of a boiler preheating device, the boiler preheating device comprises a dust filtering component, and the other end of the boiler preheating device is connected with a smoke treatment device.

2. A boiler preheating system according to claim 1, wherein the boiler preheating means comprises: the dust filter device comprises a first fixed base (3), wherein a dust filter assembly and a waste heat recovery assembly are fixedly installed on the top end of the first fixed base (3) from left to right, and a smoke outlet of the dust filter assembly is communicated with a smoke inlet of the waste heat recovery assembly.

3. A boiler preheating system according to claim 2, wherein the dust filter assembly comprises: the filter case (4), filter case (4) left end is connected with play cigarette pipeline one (2), filter case (4) right-hand member is connected with waste heat recovery subassembly, just filter case (4) bottom fixed mounting has dust collecting box (5), and interval grafting is in about a plurality of filter (6) in filter case (4), just filter (6) top fixed mounting has handle (7), filter (6) left side bottom is equipped with through-hole one (8), through-hole one (8) and dust collecting box (5) intercommunication, dust collecting box (5) bottom fixed mounting is on unable adjustment base one (3).

4. A boiler preheating system according to claim 2, wherein the waste heat recovery assembly comprises: waste heat recovery case (9), waste heat recovery case (9) top fixed mounting has feed liquor pipe one (10), fixed mounting has valve one (11) on feed liquor pipe one (10), waste heat recovery case (9) inside is equipped with out cigarette pipeline two (12), go out cigarette pipeline two (12) left end and filter tank (4) play mouth intercommunication, it is connected with flue gas processing apparatus to run through waste heat recovery case (9) to go out cigarette pipeline two (12) right-hand member, and a plurality of heat exchange plates (13) one end are pegged graft in waste heat recovery case (9), the heat exchange plate (13) other end is pegged graft in play cigarette pipeline two (12), drain pipe (14) one end with waste heat recovery case (9) bottom intercommunication, the drain pipe (14) other end is connected with boiler body (1), just be equipped with valve two (15) on drain pipe (14).

5. A boiler preheating system according to claim 2, wherein the flue gas treatment device comprises: the treatment box (16), treatment box (16) bottom fixed mounting is on unable adjustment base two (48), just treatment box (16) from left to right is provided with cavity one (17), cavity two (18) and cavity three (19) respectively, cavity one (17) bottom is equipped with electrostatic precipitator (23), electrostatic precipitator (23) input with waste heat recovery subassembly's play mouth intercommunication, the output of electrostatic precipitator (23) is connected with play tobacco pipe three (22), go out tobacco pipe three (22) left and right sides fixed mounting be in on cavity one (17) inner wall, driving motor one (20) fixed mounting is in go out tobacco pipe two (12) top on treatment box (16), just driving motor one (20) output shaft runs through treatment box (16) and flabellum (21) are connected, just flabellum (21) set up in play tobacco pipe three (22), play tobacco pipe three (22) are connected with cavity two (18) and are fixed mounting in countercurrent valve (24), gas flow adjustment mechanism is installed on cavity one (17) inner wall top.

6. A boiler preheating system according to claim 5, wherein the gas flow regulating mechanism comprises: the installation seat (25), installation seat (25) fixed mounting is in on the inner wall of cavity one (17) right-hand member, just fixed mounting has driving motor two (26) on installation seat (25), driving motor two (26)'s output shaft fixed mounting has belt pulley one (27), belt pulley one (27) are connected through the belt with belt pulley two (28), belt pulley two (28) fixed mounting is on cam (29), cam (29) coaxial rotation connects in gag lever post (30) one end, gag lever post (30) other end fixed mounting is on cavity one (17) inner wall, cam (29) bottom go out and be equipped with baffle (31) on tobacco pipe three (22), sliding connection is in out in three (22) from top to bottom baffle (31), just baffle (31) top and cam (29) contact, reset spring (32) one end fixed mounting is on baffle (31), reset spring (32) other end fixed mounting is on out three (22) of tobacco pipe.

7. A boiler preheating system according to claim 6, characterized in that a mixing and stirring mechanism is provided in the second chamber (18), the mixing and stirring mechanism comprising: the three (33) of driving motor, the fixed mounting of driving motor three (33) is in cavity two (18) bottom, just the output of driving motor three (33) runs through baffle (34) and is connected with puddler (35), fixed mounting has a plurality of stirring vane (36) on puddler (35), cavity two (18) top fixed mounting has smoke tube (37) on processing case (16), cavity two (18) are through-hole two (38) and cavity three (19) intercommunication, be provided with liquid conveying mechanism in cavity three (19).

8. A boiler preheating system according to claim 7, wherein the liquid delivery mechanism comprises: the conveying box (39), conveying box (39) one end fixed mounting is in on the left side inner wall of cavity three (19), conveying box (39) other end fixed mounting is on two spinal branch vaulting poles (40), bracing piece (40) other end fixed mounting is in on the right-hand member inner wall of cavity three (19), conveying box (39) left side is through-hole two (38) and cavity two (18) intercommunication, conveying box (39) top fixed mounting is in the one end of connecting pipe one (41), connecting pipe one (41) other end runs through cavity two (18) and is connected with a plurality of shower nozzles (42), connecting pipe two (43) left end with conveying box (39) intercommunication, connecting pipe two (43) other end runs through processing box (16), piston (44) upper and lower sliding connection is in on conveying box (39) inner wall, and piston (44) bottom fixed mounting is in trapezoidal piece (45) one end, trapezoidal piece (45) other end and ball (46) contact, trapezoidal piece (45) right side is provided with the inclined plane, and the inclined plane is less than vertical axis one side of piston (44) vertical height that is close to the inclined plane; the ball (46) is movably connected to the output end of the air cylinder (47), and the fixed end of the air cylinder (47) is fixedly arranged on the inner wall of the right end of the cavity III (19).