CN111102602A

CN111102602A - Flue device for reducing emission of fine particulate matters in flue gas of civil heating stove based on phase change agglomeration and wet dust removal

Info

Publication number: CN111102602A
Application number: CN201911225265.0A
Authority: CN
Inventors: 邓雨荷; 刘召婷; 傅彬彬; 李振中
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-05-05
Anticipated expiration: 2039-12-04
Also published as: CN111102602B

Abstract

The invention discloses a flue device for reducing emission of fine particulate matters in flue gas of a civil heating furnace based on phase change agglomeration and wet dust removal, which comprises a liquid tank, a steam inlet pipe I, a steam inlet pipe II, a steam cooling pipe, a liquid distribution plate, a liquid film assembly, a funnel, a liquid return pipe and a flue of the heating furnace; the flue of the heating stove is arranged at the upper end of the combustion chamber of the heating stove; the liquid tank is arranged around the combustion chamber of the heating furnace; the steam inlet pipe I is positioned outside the flue of the heating furnace; the steam inlet pipe II is positioned in a flue of the heating furnace; the steam cooling pipe is positioned above the flue of the heating furnace; the liquid distribution plate is arranged in the steam cooling pipe; the liquid film component comprises a plurality of liquid film plates; the liquid film plates are arranged in the flue of the heating stove, and each liquid film plate corresponds to one through groove of the liquid distribution plate; the funnel is positioned below the liquid film assembly; the upper end of the liquid return pipe is communicated with the funnel, and the lower end of the liquid return pipe is communicated with the liquid tank; the invention has simple structure, convenient maintenance, no secondary pollutant and strong economical efficiency.

Description

Flue device for reducing emission of fine particulate matters in flue gas of civil heating stove based on phase change agglomeration and wet dust removal

Technical Field

The invention relates to the field of flue gas purification, in particular to a flue device for reducing emission of fine particulate matters in flue gas of a civil heating stove based on phase change agglomeration and wet dust removal.

Background

At present, the development direction of the control technology of fine particles (PM2.5 and particles with smaller diameter) is mainly to remove the fine particles after the fine particles are coagulated and grown up through physical or chemical action. The fine particle agglomeration dust removal technology researched at home and abroad mainly comprises the following steps: chemical agglomeration technology, acoustic agglomeration technology, electric agglomeration technology, magnetic agglomeration technology, turbulent agglomeration technology, steam phase change agglomeration technology and the like.

The wet phase change agglomeration means that the agglomeration and growth of fine particles are promoted through the phase change of saturated flue gas, the mechanism is the synergistic effect of the phase change agglomeration of the saturated flue gas and the agglomeration of the fine particles, the heat transfer and the Brownian diffusion generated in the process promote the transfer of the fine particles, the frequency of mutual collision among the fine particles is improved, and finally the particle size of the fine particles is increased, the quality is increased, and the fine particles can be smoothly removed. In the supersaturated smoke environment, the water vapor takes fine particles as condensation nuclei to generate phase change, so that the mass of the particles is increased, the particle size is increased, and the inertial trapping effect is improved.

The vapor phase-change agglomeration technology refers to a technology that in a supersaturated vapor environment, vapor takes fine particulate matter PM2.5 as a condensation nucleus, phase-change condensation occurs on the surface of the vapor, and the vapor migrates and collides under the action of thermophoretic force and diffusion, and is further agglomerated into larger particulate matter. The process of water vapor condensation is referred to as heterogeneous nucleation, or heteronucleation. Heterogeneous nucleation can take place heterogeneous nucleation on some dust particle surfaces at supersaturation value when reaching 1.002 ~ 1.013, steam. After heterogeneously nucleated particles grow, Krastanov explained the condensation of steam on the particle surface as early as 1957, who thought that steam condensed around the particle surface as a core, and the condensed steam wrapped the particle in a continuous water film.

Wet dust removal is a method of cleaning a gas by sufficiently contacting a dust-containing gas with a cleaning liquid (generally water) to remove dust particles. The dust removing mode has high efficiency, the dust remover has simple structure, low cost, small occupied area and convenient operation and maintenance, is particularly suitable for treating high-temperature, high-humidity, inflammable and explosive dusty gas, and can remove partial gaseous pollutants while removing dust. Therefore, the method is widely applied to air pollution control and gas purification of various departments in industrial production.

At present, researches on emission reduction of fine particulate matters of the civil heating stove are not many, a novel energy-saving or emission-reducing heating stove is designed from the heating stove, and few improvement devices are designed on the aspect of emission reduction of the fine particulate matters of the existing civil heating stove.

Disclosure of Invention

Aiming at the defects or shortcomings, the invention aims to design a flue device for reducing emission of fine particles by utilizing the basic principle of phase-change agglomeration of fine particles and wet liquid film dust removal and combining the structural characteristics of a civil heating stove.

The technical scheme adopted for achieving the purpose of the invention is that the flue device for reducing emission of fine particulate matters in flue gas of the civil heating stove based on phase change agglomeration and wet dust removal comprises a liquid tank, a steam inlet pipe I, a steam inlet pipe II, a steam cooling pipe, a liquid distribution plate, a liquid film assembly, a funnel, a liquid return pipe and a flue of the heating stove.

The heating stove flue is installed at the upper end of the combustion chamber of the heating stove.

The liquid tank is arranged around a combustion chamber of a heating stove.

And the steam inlet pipe I is positioned outside a flue of the heating stove. The lower end of the steam inlet pipe I is communicated with the liquid tank. And the upper end of the steam inlet pipe I is connected to the side wall of the lower end of the heating furnace flue and communicated with the inside of the heating furnace flue.

And the steam inlet pipe II is positioned in the flue of the heating furnace, the lower end of the steam inlet pipe II is communicated with the liquid tank, and the upper end of the steam inlet pipe II extends out of the flue of the heating furnace.

The steam cooling pipe is positioned above the flue of the heating furnace. One end of the steam cooling pipe is communicated with the upper end of the steam inlet pipe II, and the other end of the steam cooling pipe is bent downwards to form an open end. The open end is communicated with a flue of the heating furnace.

The liquid distribution plate is plate-shaped, and a plurality of through grooves are formed in the plate surface. The liquid distribution plate is arranged in the open end of the steam cooling pipe.

The liquid film assembly comprises a plurality of liquid film plates. The liquid film plate is in a grid shape. A plurality of liquid lamina membranacea is arranged in the heating stove flue, and each liquid lamina membranacea all leads to the groove corresponding with a cloth liquid board.

The funnel is communicated with the flue of the heating furnace and is positioned below the liquid film component. And the funnel is provided with filter cloth.

The upper end of the liquid return pipe is communicated with the funnel, and the lower end of the liquid return pipe is communicated with the liquid tank.

In operation, fuel is combusted in the combustion chamber of the heating stove, and the heat generated heats and vaporizes the liquid in the liquid tank. And a part of steam enters the flue of the heating furnace through the steam inlet pipe I to be subjected to phase change agglomeration with the flue gas generated by the combustion chamber of the heating furnace, and the flue gas subjected to phase change agglomeration rises to the liquid membrane plate of the liquid membrane assembly through the flue of the heating furnace. The other part of steam flows through the steam cooling pipe through the steam inlet pipe II and then is cooled and condensed into liquid, flows down above the liquid distribution plate, and forms a liquid film on the liquid film plate. The liquid film catches the particulate matter when the flue gas passes through the liquid film board, and liquid carries the particulate matter to fall into the funnel under the effect of gravity, and liquid through filter cloth filtration returns to the liquid tank through the liquid back flow.

Further, the device also comprises ribs.

The fin is installed on the outer wall of heating stove flue lower extreme.

Further, a water filling port is installed on the steam cooling pipe. The filler is located above the open end.

Furthermore, the open end is provided with a regulating valve.

Further, the pipe diameter of the liquid return pipe is 10 mm.

Furthermore, the upper surface of the liquid distribution plate is a cambered surface protruding towards the upper surface. The through grooves are arranged on the plate surface of the liquid distribution plate in a staggered mode. A plurality of the liquid film board is crisscross to be arranged in the heating stove flue, and each liquid film board all leads to the groove with cloth liquid board and corresponds.

Further, the length of the through groove is 2/3 the width of the liquid distribution plate.

The invention has the advantages that the technical effect is undoubted, the flue of the civil heating stove is reformed, the blank that the existing heating stove is lack of a fine particle emission reduction device is filled, the emission reduction process is environment-friendly, the emission reduction effect is obvious, an external power supply is not needed for emission reduction of fine particles in flue gas, the structure is simple, the maintenance is convenient, secondary pollutants are not generated, and the economy is strong.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the liquid distribution plate;

FIG. 3 is a front view of a liquid distribution plate;

FIG. 4 is a schematic view of a liquid film plate 1;

fig. 5 is a schematic view of a liquid film plate 2.

In the figure: the device comprises a liquid tank 1, a steam inlet pipe I2, a steam inlet pipe II3, a steam cooling pipe 4, an open end 401, a water filling port 5, a liquid distribution plate 6, a through groove 601, a liquid film assembly 7, a funnel 8, a liquid return pipe 9, fins 10, a heating furnace flue 11, a heating furnace combustion chamber 12 and a regulating valve 13.

Detailed Description

The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.

Example 1:

the embodiment discloses a flue device for reducing emission of fine particulate matters in flue gas of a civil heating stove based on phase change agglomeration and wet dust removal, and the flue device comprises a liquid tank 1, a steam inlet pipe I2, a steam inlet pipe II3, a steam cooling pipe 4, a liquid distribution plate 6, a liquid film assembly 7, a funnel 8, a liquid return pipe 9, fins 10 and a flue 11 of the heating stove, and is shown in the figure 1.

Heating stove flue 11 is fixed in heating stove combustion chamber 12 upper end, communicates heating stove combustion chamber 12.

Liquid case 1 is annular liquid case, and whole liquid case 1 is around on heating stove combustion chamber 12, is equipped with water in the liquid case 1.

The steam inlet pipe I2 is positioned outside the flue 11 of the heating stove. The lower end of the steam inlet pipe I2 is communicated with the liquid tank 1. The upper end of the steam inlet pipe I2 is bent and inserted into the side wall of the lower end of the flue 11 of the heating furnace and communicated with the inside of the flue 11 of the heating furnace.

Steam inlet pipe II3 is located heating stove flue 11, and its lower extreme intercommunication liquid case 1, the upper end stretches out from heating stove flue 11.

The steam cooling pipe 4 is located above the heating stove flue 11. One end of the steam cooling pipe 4 is communicated with the upper end of the steam inlet pipe II3, and the other end is bent downwards to form an open end 401. The open end 401 communicates with the heating stove flue 11. And a water filling port 5 is fixed on the steam cooling pipe 4. The filler 5 is directly above the open end 401.

Referring to fig. 2 and 3, the liquid distribution plate 6 is plate-shaped, the upper surface of the liquid distribution plate is an upwardly convex arc surface, and a plurality of through grooves 601 are arranged in parallel on the plate surface. The length of the through grooves 601 is 2/3 of the width of the liquid distribution plate, the through grooves are arranged on the plate surface of the liquid distribution plate 6 in a staggered mode, the width of the outlet of each through groove 601 is the same, the bottom of each through groove is upwards at a drawing angle of 30 degrees, the side wall of each through groove is an inclined plane, and the cross section of each through groove 601 is approximate to an isosceles trapezoid. The liquid distribution plate 6 is embedded in the open end 401 of the steam cooling pipe 4.

The liquid film assembly 7 comprises a plurality of liquid film plates. Referring to fig. 4 and 5, the liquid film plate is in a dense grid shape. The grid mesh width is 2/3 of the total width of the liquid film plate, with the grid mesh on the right side as positive and the grid mesh on the left side as negative. A plurality of liquid lamina membranacea is positive one is reverse to alternate embedding on heating stove flue 11 inner wall, and each liquid lamina membranacea all corresponds with a logical groove 601 of cloth liquid board 6.

Funnel 8 intercommunication heating stove flue 11 to be located liquid film subassembly 7 below. And filter cloth is attached to the funnel 8.

The upper end of the liquid return pipe 9 is communicated with the funnel 8, and the lower end is communicated with the liquid tank 1.

The fins 10 are fixed on the outer wall of the lower end of the flue 11 of the heating stove and correspond to the position of the steam inlet pipe I2.

During operation, a proper amount of coal is added into the combustion chamber 12 of the heating stove, water is slowly added into the device through the water adding port 5, the water flows to the liquid film plate through the through groove 601 of the liquid distribution plate 6, a liquid film is formed on the liquid film plate, and the coal burns in the combustion chamber 12 of the heating stove to generate heat to heat the water in the liquid tank 1 so as to generate a large amount of water vapor to participate in the subsequent process.

A part of the water vapor enters the vapor cooling pipe 4 through the vapor inlet pipe II3, and is cooled and condensed into liquid water in the vapor cooling pipe 4 through heat exchange with the outside, and the liquid water flows through the open end 401 of the vapor cooling pipe 4 to reach the liquid distribution plate 6. The liquid distribution plate 6 is arranged corresponding to the liquid film plate, so that liquid drops can accurately drop on the liquid film plate of the liquid film assembly 7. The liquid film plate is designed with a dense grid net, so that liquid drops are more easily attached to form a liquid film when flowing through. Liquid film board parallel arrangement in liquid film subassembly 7 to the area of contact of increase liquid film and flue gas promotes the collision of fine particles thing and liquid film, improves the efficiency that the liquid film removed dust.

And the other part of water vapor reaches the lower end of a flue 11 of the heating furnace above the combustion chamber 12 of the heating furnace through a steam inlet pipe I2, and is subjected to phase change agglomeration with flue gas generated in the combustion chamber 12 of the heating furnace in the area, so that the smaller fine particles in the flue gas are larger particles with the diameter of 2-4 mu m at most. The fin 10 structure is designed outside the lower end of the heating furnace flue 11, so that the heat dissipation of the agglomeration area is enhanced, the temperature of the agglomeration area is reduced, and certain supersaturation degree of steam is facilitated; because dust concentration is higher in the heating stove combustion chamber 12 upper end, the steam pressure that the liquid drop is in the oversaturation state is less, consequently the steam easily becomes the lower oversaturation steam of saturation in heating stove combustion chamber 12 upper end, carries out the phase transition with the flue gas that produces in the heating stove combustion chamber 12 in the regional reunion of heating stove flue 11 lower extreme, and temperature humidity is all better, can reach the effect that the less particulate matter in the flue gas grows up.

Flue gas after the phase transition is reunited rises to liquid membrane subassembly 7 through heating stove flue 11, because liquid lamina membranacea parallel arrangement, the particulate matter in the flue gas is long and large in the phase transition reunion district successfully, and the particulate matter is caught at this regional high efficiency, and liquid on the liquid lamina membranacea carries the particulate matter by the entrapment under the effect of gravity and filters in flowing into below funnel 8, and the particulate matter after the filtration is remaining on the filter cloth, and the water after the filtration returns to liquid tank 1 through liquid back flow 9. The filter cloth used in the funnel 8 can determine the replacement period according to the use frequency and the residual quantity of the particulate matters on the filter cloth; the liquid return pipe 9 connected below the funnel 8 is designed into a pipe with a thinner pipe diameter so as to reduce the steam amount in the liquid return pipe 9 and promote the smooth liquid return. When the water quantity in the liquid tank 1 is insufficient or more particles are adhered to the liquid membrane plate, water can be added through the water adding port 5 when the smoke gas flows unsmoothly, on one hand, the water quantity can be supplemented, on the other hand, the liquid membrane plate can be washed to a certain degree, and the trapped fine particles are promoted to fall off from the liquid membrane plate.

Further, the open end 401 has a regulating valve 13 thereon for controlling the flow rate of the liquid droplets.

The utility model discloses a flue device of civilian heating stove emission reduction flue gas fine particle thing based on phase transition reunion and wet dedusting, through carrying out flue transformation to civilian heating stove, compensate current heating stove and lack the blank of fine particle thing emission reduction device, emission reduction process environmental protection, emission reduction effect are obvious, the device of carrying out the emission reduction of flue gas fine particle thing through this embodiment need not external power source, simple structure, it is convenient to maintain, does not produce secondary pollutant simultaneously, and economic nature is strong.

Example 2:

the embodiment provides a relatively basic implementation manner, a flue device for reducing emission of fine particulate matters in flue gas of a civil heating stove based on phase change agglomeration and wet dust removal, and referring to fig. 1, the flue device comprises a liquid tank 1, a steam inlet pipe I2, a steam inlet pipe II3, a steam cooling pipe 4, a liquid distribution plate 6, a liquid film assembly 7, a funnel 8, a liquid return pipe 9 and a heating stove flue 11.

The steam cooling pipe 4 is located above the heating stove flue 11. One end of the steam cooling pipe 4 is communicated with the upper end of the steam inlet pipe II3, and the other end is bent downwards to form an open end 401. The open end 401 communicates with the heating stove flue 11.

Referring to fig. 2 and 3, the liquid distribution plate 6 is plate-shaped, and the plate surface is provided with a plurality of through grooves 601. The liquid distribution plate 6 is embedded in the open end 401 of the steam cooling pipe 4.

The liquid film assembly 7 comprises a plurality of liquid film plates. Referring to fig. 4 and 5, the liquid film plate is in a dense grid shape. A plurality of the liquid film board embedding is on heating stove flue 11 inner wall, and each liquid film board all corresponds with logical groove 601 of cloth liquid board 6.

During operation, a proper amount of coal is added into the combustion chamber 12 of the heating furnace, and the coal is combusted in the combustion chamber 12 of the heating furnace to generate heat to heat water in the liquid tank 1 so as to generate a large amount of water vapor.

A part of the water vapor enters the vapor cooling pipe 4 through the vapor inlet pipe II3, and is cooled and condensed into liquid water in the vapor cooling pipe 4 through heat exchange with the outside, and the liquid water flows through the open end 401 of the vapor cooling pipe 4 to reach the liquid distribution plate 6. The liquid distribution plate 6 is arranged corresponding to the liquid film plate, so that liquid drops can accurately drop on the liquid film plate of the liquid film assembly 7. The liquid film plate is designed with a dense grid net, so that liquid drops are more easily attached to form a liquid film when flowing through.

And the other part of water vapor reaches the lower end of a flue 11 of the heating furnace above the combustion chamber 12 of the heating furnace through a steam inlet pipe I2, and is subjected to phase change agglomeration with flue gas generated in the combustion chamber 12 of the heating furnace in the area, so that the smaller fine particles in the flue gas are larger particles with the diameter of 2-4 mu m at most. Because dust concentration is higher in the heating stove combustion chamber 12 upper end, the steam pressure that the liquid drop is in the oversaturation state is less, consequently the steam easily becomes the lower oversaturation steam of saturation in heating stove combustion chamber 12 upper end, carries out the phase transition with the flue gas that produces in the heating stove combustion chamber 12 in the regional reunion of heating stove flue 11 lower extreme, and temperature humidity is all better, can reach the effect that the less particulate matter in the flue gas grows up.

Flue gas after the phase transition is reunited rises to liquid membrane subassembly 7 through heating stove flue 11, because liquid lamina membranacea parallel arrangement, the particulate matter in the flue gas is long and large in the phase transition reunion district successfully, and the particulate matter is caught at this regional high efficiency, and liquid on the liquid lamina membranacea carries the particulate matter by the entrapment under the effect of gravity and filters in flowing into below funnel 8, and the particulate matter after the filtration is remaining on the filter cloth, and the water after the filtration returns to liquid tank 1 through liquid back flow 9. The filter cloth used in the hopper 8 can determine the replacement period according to the use frequency and the residual amount of particulate matter on the filter cloth.

Example 3:

the main structure of this embodiment is the same as that of embodiment 2, and further, the device further includes a rib 10.

The fins 10 are fixed on the outer wall of the lower end of the flue 11 of the heating stove and correspond to the position of the steam inlet pipe I2. When the steam generator works, the fins 10 enhance the heat dissipation of the agglomeration area, so that the temperature of the agglomeration area is reduced, and certain supersaturation degree of steam is facilitated.

Example 4:

the main structure of this embodiment is the same as that of embodiment 2, and further, a water filling port 5 is fixed on the steam cooling pipe 4. The filler 5 is directly above the open end 401.

After a proper amount of coal is added into a combustion chamber 12 of the heating furnace, water is slowly added into the device through a water adding port 5, flows to the liquid film plate through the through groove 601 of the liquid distribution plate 6, and forms a liquid film on the liquid film plate to participate in the subsequent process.

When the water quantity in the liquid tank 1 is insufficient or more particles are adhered to the liquid membrane plate, water can be added through the water adding port 5 when the smoke gas flows unsmoothly, on one hand, the water quantity can be supplemented, on the other hand, the liquid membrane plate can be washed to a certain degree, and the trapped fine particles are promoted to fall off from the liquid membrane plate.

Example 5:

the main structure of this embodiment is the same as that of embodiment 2, and further, the open end 401 has a regulating valve 13 for controlling the flow rate of the liquid droplets.

Example 6:

the main structure of this embodiment is the same as that of embodiment 2, and further, the pipe diameter of the liquid return pipe 9 is 10 mm. The liquid return pipe 9 connected below the funnel 8 is designed into a pipe with a thinner pipe diameter, so that the steam quantity in the liquid return pipe 9 is reduced, and the liquid is also promoted to smoothly return.

Example 7:

the main structure of this embodiment is the same as that of embodiment 2, and further, the upper surface of the liquid distribution plate 6 is an upwardly convex arc surface. A plurality of leads to groove 601 staggered arrangement on the face of cloth liquid board 6, and every leads to groove 601 exit width homogeneous phase the same, leads to the groove bottom and makes the channel lateral wall be the inclined plane for drawing die angle 30 upwards, leads to groove 601 cross-section approximate isosceles trapezoid promptly.

The width of the grid mesh is 2/3 of the total width of the liquid film plate, the grid mesh is positive on the right side, and the grid mesh is negative on the left side. A plurality of liquid lamina membranacea is positive one is reverse to alternate embedding on heating stove flue 11 inner wall, and each liquid lamina membranacea all corresponds with a logical groove 601 of cloth liquid board 6. Through the staggered arrangement mode to the area of contact of increase liquid film and flue gas promotes the collision of fine particles thing and liquid film, improves the efficiency that the liquid film removed dust.

Example 8:

the main structure of this embodiment is the same as that of embodiment 7, and further, the length of the through groove 601 is 2/3 of the width of the liquid distribution plate 6.

Claims

1. The utility model provides a flue device of civilian heating stove emission reduction flue gas fine particle thing based on phase transition is reunited and wet dedusting which characterized in that: comprises a liquid box (1), a steam inlet pipe I (2), a steam inlet pipe II (3), a steam cooling pipe (4), a liquid distribution plate (6), a liquid film assembly (7), a funnel (8), a liquid return pipe (9) and a heating furnace flue (11);

the heating furnace flue (11) is arranged at the upper end of a combustion chamber (12) of the heating furnace;

the liquid tank (1) is arranged around a combustion chamber (12) of a heating furnace;

the steam inlet pipe I (2) is positioned outside a flue (11) of the heating stove; the lower end of the steam inlet pipe I (2) is communicated with the liquid tank (1); the upper end of the steam inlet pipe I (2) is connected to the side wall of the lower end of the heating furnace flue (11) and communicated with the inside of the heating furnace flue (11);

the steam inlet pipe II (3) is positioned in the flue (11) of the heating furnace, the lower end of the steam inlet pipe II is communicated with the liquid tank (1), and the upper end of the steam inlet pipe II extends out of the flue (11) of the heating furnace;

the steam cooling pipe (4) is positioned above a flue (11) of the heating stove; one end of the steam cooling pipe (4) is communicated with the upper end of the steam inlet pipe II (3), and the other end of the steam cooling pipe is bent downwards to form an open end (401); the open end (401) is communicated with a flue (11) of the heating stove;

the liquid distribution plate (6) is plate-shaped, and a plurality of through grooves (601) are formed in the plate surface; the liquid distribution plate (6) is arranged in the open end (401) of the steam cooling pipe (4);

the liquid film assembly (7) comprises a plurality of liquid film plates; the liquid membrane plate is in a grid shape; the liquid film plates are arranged in a flue (11) of the heating furnace, and each liquid film plate corresponds to one through groove (601) of the liquid distribution plate (6).

The funnel (8) is communicated with a flue (11) of the heating furnace and is positioned below the liquid film component (7); the funnel (8) is provided with filter cloth;

the upper end of the liquid return pipe (9) is communicated with the funnel (8), and the lower end of the liquid return pipe is communicated with the liquid tank (1);

when the heating furnace works, fuel is combusted in a combustion chamber (12) of the heating furnace, and the generated heat heats and evaporates liquid in the liquid tank (1); a part of steam enters a flue (11) of the heating stove through a steam inlet pipe I (2) to be subjected to phase change agglomeration with smoke generated by a combustion chamber (12) of the heating stove, and the smoke subjected to phase change agglomeration rises to a liquid film plate of the liquid film assembly (7) through the flue (11) of the heating stove; the other part of steam flows through the steam cooling pipe (4) through the steam inlet pipe II (3) and is cooled and condensed into liquid, flows down above the liquid distribution plate (6), and forms a liquid film on the liquid film plate; when smoke passes through the liquid membrane plate, the liquid membrane traps particulate matters, liquid carries the particulate matters to fall into the funnel (8) under the action of gravity, and the liquid filtered by the filter cloth returns to the liquid tank (1) through the liquid return pipe (9).

2. The flue device of emission reduction flue gas fine particle thing of civil heating stove based on phase transition agglomeration and wet dedusting of claim 2, characterized in that: also comprises ribs (10);

the fins (10) are arranged on the outer wall of the lower end of the flue (11) of the heating stove.

3. The flue device of emission reduction flue gas fine particle thing of civil heating stove based on phase transition agglomeration and wet dedusting of claim 1, characterized in that: a water filling port (5) is arranged on the steam cooling pipe (4); the filler (5) is located above the open end (401).

4. The flue device of emission reduction flue gas fine particle thing of civil heating stove based on phase transition agglomeration and wet dedusting of claim 1, characterized in that: and the open end (401) is provided with a regulating valve (13).

5. The flue device of emission reduction flue gas fine particle thing of civil heating stove based on phase transition agglomeration and wet dedusting of claim 1, characterized in that: the pipe diameter of the liquid return pipe (9) is 10 mm.

6. The flue device of emission reduction flue gas fine particle thing of civil heating stove based on phase transition agglomeration and wet dedusting of claim 1, characterized in that: the upper surface of the liquid distribution plate (6) is a cambered surface which is convex; the through grooves (601) are arranged on the surface of the liquid distribution plate (6) in a staggered mode; the liquid film plates are arranged in the flue (11) of the heating furnace in a staggered mode, and each liquid film plate corresponds to one through groove (601) of the liquid distribution plate (6).

7. The flue device of emission reduction flue gas fine particle thing of civil heating stove based on phase transition agglomeration and wet dedusting of claim 6, characterized in that: the length of the through groove (601) is 2/3 of the width of the liquid distribution plate (6).