CN207635366U - Heat preservation mechanism for chimney construction - Google Patents

Abstract

The utility model provides a kind of heat preservation mechanism for chimney construction.Heat preservation mechanism includes：Heat-exchanger rig, in chimney, heat-exchanger rig includes heat exchanging pipe and the radiator structure that is connected to heat exchanging pipe, and radiator structure is fixed on the dust stratification platform of chimney, heat transferring medium is flowed in heat exchanging pipe and is radiated by radiator structure, to be internally heated to chimney.The utility model efficiently solves the problems, such as that chimney construction cannot be carried out at low ambient temperatures in the prior art.

Description

Heat preservation mechanism for chimney construction

Technical field

The utility model is related to chimney technical fields, in particular to a kind of heat preservation mechanism for chimney construction.

Background technology

In 2003, power plant of China, which promotes, used Limestone-gypsum Wet Flue Gas Desulfurization Process technique, and the limestone-gypsum of early stage It is substantially all in wet desulfurization system and is configured with flue gas heat-exchange unit (Gas-gas heater, GGH).But in actual operation, GGH components will appear the problems such as serious burn into heat exchange element blocks.

After 2007, the wet desulfurization system of domestic design starts the chimney form phased out GGH, designed at that time Mainly there are patch foamed glass brick chimney, titanium steel composite board set in corrosion-proof type single-drum chimney, brick sleeve-type chimney, the steel bushing of resistance to sulfuric acid Cylinder chimney etc..However, to the end of the year 2015, a large amount of corrosion-proof type single-drum chimney, brick sleeve-type chimney, the steel of resistance to sulfuric acid from 2009 There is different degrees of leakage corrosion in the chimney of the domestic foamed glass brick of patch in sleeve, and some is quite serious, has influenced cigarette The safety of chimney structure, individual sleeve chimneys collapse since steel cylinder fracture occurs not in time in repair, affect the safety of power plant Operation.Up to the present, domestic existing more than 100 wet desulphurization chimney is transformed.

In the prior art, having relevant enterprise uses the attaching Bin Gaode brick glue in monotubular concrete chimney to carry out chimney Anti-corrosion transformation.However, environment temperature is required to be not less than 15 DEG C in the work progress of Bin Gaode brick glue, matrix surface temperature is not low When 10 DEG C, winter construction environment temperature at 0 DEG C hereinafter, it is impossible to ensure that construction continuity, influence construction speed.

Utility model content

The main purpose of the utility model is to provide a kind of heat preservation mechanisms for chimney construction, to solve the prior art In the problem of cannot carrying out chimney construction at low ambient temperatures.

To achieve the goals above, the utility model provides a kind of heat preservation mechanism for chimney construction, including：Heat exchange Device is located in chimney, and heat-exchanger rig includes heat exchanging pipe and the radiator structure that is connected to heat exchanging pipe, and radiator structure is fixed on On the dust stratification platform of chimney, heat transferring medium is flowed in heat exchanging pipe and is radiated by radiator structure, with the inside to chimney into Row heating.

Further, heat exchanging pipe is circumferentially disposed along the inner wall of chimney, and radiator structure is multiple, and multiple radiator structures exist Setting is spaced on heat exchanging pipe.

Further, heat preservation mechanism further includes air inlet pipeline and outlet tube road, air inlet pipeline and outlet tube road respectively with change Pipe line is connected to, and steam is entered to from air inlet pipeline in heat exchanging pipe and radiator structure, through by changing after liquefying in radiator structure Pipe line is simultaneously discharged from outlet tube road.

Further, the internal diameter of air inlet pipeline is more than or equal to 50mm and is less than or equal to 100mm.

Further, heat exchanging pipe is two groups, and two groups of heat exchanging pipes are arranged along the extending direction interval of chimney, heat dissipation knot Structure connects two heat exchanging pipes, and air inlet pipeline is connected to the heat exchanging pipe being located above, outlet tube road and underlying heat exchange Pipeline connection.

Further, radiator structure includes multiple intermediate conduits and two transition conduits, and two transition conduits are located at The both ends of multiple intermediate conduits, the heat exchanging pipe being located above include multiple spaced first heat exchange pipeline sections, are located at lower section Heat exchanging pipe include multiple spaced second heat exchange pipeline sections, each transition conduit has the first end and second that is oppositely arranged End, the first heat exchange pipeline section are connected to the first end of two transition conduits, the second end of the second heat exchange pipeline section and two transition conduits Connection.

Further, multiple intermediate conduits are arranged in parallel.

Further, the internal diameter of intermediate conduit is more than or equal to 150mm and is less than or equal to 170mm.

Further, heat preservation mechanism further includes：Electric heater is arranged in chimney, and electric heater is located at heat-exchanger rig Top and with dust stratification platform have preset distance.

Further, heat preservation mechanism further includes：One or more heat preservation members, at least one heat preservation member are arranged on the top of chimney At portion's outlet flue, to be blocked to top outlet flue.

Further, the inner wall of chimney has interconnecting piece, when heat preservation member is multiple, extension of multiple heat preservation members along chimney Direction interval is arranged, and part heat preservation member is connect with interconnecting piece so that heat preservation member blocks the chimney at this.

Further, the distance between each heat preservation member L is more than or equal to 60m and is less than or equal to 80m.

Further, heat preservation member includes：Supporting network；Cotton-wadded quilt is laid on supporting network；Flameproof fabric, be folded in supporting network with Between cotton-wadded quilt.

Further, it is equipped with plastic cloth on the surface of the separate supporting network of cotton-wadded quilt.

Further, heat preservation mechanism further includes gas exhaust piping, and gas exhaust piping is connected to heat exchanging pipe, and steam can be from exhaust Pipeline drains into the external world.

Using the technical solution of the utility model, heat preservation mechanism includes heat-exchanger rig.Wherein, heat-exchanger rig is located at chimney Interior, heat-exchanger rig includes heat exchanging pipe and the radiator structure that is connected to heat exchanging pipe, and the dust stratification that radiator structure is fixed on chimney is flat On platform, heat transferring medium is flowed in heat exchanging pipe and is radiated by radiator structure, to be internally heated to chimney.In this way, Heat transferring medium can be entered to radiator structure by heat exchanging pipe and carry out heat exchange in radiator structure so that radiator structure Chimney is internally heated, ensures to maintain specific range of temperatures inside chimney.

When constructing in winter to chimney inside, heat transferring medium circulates in heat exchanging pipe and passes through radiator structure and cigarette Heat exchange is carried out inside chimney, so that in the temperature for being suitble to construction inside chimney, and then ensure the continuity of construction, Bu Huiyou Construction speed is influenced in winter cold.

Description of the drawings

The accompanying drawings which form a part of this application are used to provide a further understanding of the present invention, this practicality Novel illustrative embodiments and their description are not constituted improper limits to the present invention for explaining the utility model. In the accompanying drawings：

Fig. 1 shows the sectional view of the embodiment of the heat preservation mechanism according to the present utility model for chimney construction；And

Fig. 2 shows the partial structural diagrams of the radiator structure of the heat preservation mechanism in Fig. 1.

Wherein, above-mentioned attached drawing includes the following drawings label：

10, chimney；11, dust stratification platform；21, heat exchanging pipe；22, radiator structure；221, intermediate conduit；222, coupling tube Road；31, air inlet pipeline；32, outlet tube road；33, gas exhaust piping；40, melt pit.

Specific implementation mode

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have and the application The normally understood identical meanings of person of an ordinary skill in the technical field.

In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower " is typically to be directed to For direction shown in the drawings, or on vertical, vertical or gravity direction；Similarly, for ease of understanding And description, " left and right " is typically for shown in the drawings left and right；" inside and outside " refers to the profile relative to each component itself It is inside and outside, but the above-mentioned noun of locality is not intended to limit the utility model.

In order to solve the problems, such as that chimney construction cannot be carried out at low ambient temperatures in the prior art, this application provides one kind Heat preservation mechanism for chimney construction.The heat preservation mechanism of the application is mainly used for applying for monotubular concrete chimney female guest's Gao De brick glue Work is kept the temperature.

As depicted in figs. 1 and 2, heat preservation mechanism includes heat-exchanger rig.Wherein, heat-exchanger rig is located in chimney 10, heat exchange dress It sets including heat exchanging pipe 21 and the radiator structure being connected to heat exchanging pipe 21 22, the dust stratification that radiator structure 22 is fixed on chimney 10 is flat On platform 11, heat transferring medium is flowed in heat exchanging pipe 21 and is radiated by radiator structure 22, is added with the inside to chimney 10 Heat.

Using the technical solution of the present embodiment, heat transferring medium can be entered to by heat exchanging pipe 21 radiator structure 22 and Heat exchange is carried out in radiator structure 22 so that radiator structure 22 is internally heated to chimney 10, is ensured inside chimney 10 Maintain specific range of temperatures.

When in winter to constructing inside chimney 10, heat transferring medium circulates in heat exchanging pipe 21 and passes through radiator structure 22 carry out heat exchange with 10 inside of chimney, so that 10 inside of chimney is in the temperature for being suitble to construction, and then ensure the company of construction Continuous property will not influence construction speed since winter is cold.

In the present embodiment, in Bin Gaode brick glue work progress, the floss hole of chimney 10 is closed, using heat-exchanger rig plus The heat insulating construction method that heat, the heating of electric heater auxiliary, the inside segmentation of chimney 10 separate.

As shown in Figure 1, heat exchanging pipe 21 is circumferentially disposed along the inner wall of chimney 10, radiator structure 22 is multiple, and multiple scattered Heat structure 22 is spaced setting on heat exchanging pipe 21.Specifically, Bin Gaode bricks sticker is attached on the inner wall of chimney 10, heat exchanging pipe 21 are arranged close to the inner wall of chimney 10, and then ensure that the inner wall temperature of chimney 10 reaches Bin Gaode brick glue construction requirements, ensure cigarette The interior construction of chimney 10 is smoothed out.

Optionally, multiple radiator structures 22 are arranged evenly and at intervals on heat exchanging pipe 21.In this way, above-mentioned setting makes cigarette Temperature on the inner wall of chimney 10 is more uniform, so that the construction of staff is more smooth, continuous, improves construction quality.

In the present embodiment, the quantity of radiator structure 22 is depending on the size of dust stratification platform 11, in radiator structure 22 Supporting leg is welded in lower section, it is made to be fixed on dust stratification platform 11.

As shown in Figure 1, heat preservation mechanism further includes air inlet pipeline 31 and outlet tube road 32, air inlet pipeline 31 and outlet tube road 32 It is connected to respectively with heat exchanging pipe 21, steam is entered to from air inlet pipeline 31 in heat exchanging pipe 21 and radiator structure 22, is tied in heat dissipation Through being discharged by heat exchanging pipe 21 and from outlet tube road 32 after liquefaction in structure 22.Specifically, the floss hole closing of chimney 10 so that steam Vapour enters from air inlet pipeline 31 in heat exchanging pipe 21, and carries out heat exchange with the inside of chimney 10 in radiator structure 22, then Steam liquefies in radiator structure 22 or heat exchanging pipe 21, and the water after liquefaction is via heat exchanging pipe 21 from outlet tube road 32 Discharge.Such circulate operation so that the inside of chimney 10 maintains specific range of temperatures, and then ensures 10 female guest's Gao De bricks of chimney The continuity of glue construction.

Specifically, air inlet pipeline 31 is picked out from nearby with steam pipeline, and in air inlet pipeline 31 pressure control 1.0~ Between 1.4Mpa, steam temperature is between 260~270 DEG C.Valve is installed on air inlet pipeline 31, with control air inlet pipeline 31 with The break-make of steam pipeline, to ensure the temperature isolation processing up to standard under abnormal conditions.

In the present embodiment, the internal diameter of air inlet pipeline 31 is more than or equal to 50mm and is less than or equal to 100mm.In this way, above-mentioned set Setting can ensure that steam supply is sufficient in heat preservation mechanism, and waste of steam will not occur, and then improve the heat preservation effect of heat preservation mechanism Fruit.Wherein, the internal diameter of air inlet pipeline 31 is depending on the bore of interface steam pipeline.

Optionally, air inlet pipeline 31 is seamless steel pipe.In this way, above-mentioned setting can ensure the air-tightness of heat preservation mechanism, one Aspect prevents steam from leakage occurs in the inside of chimney 10 and influences construction quality；On the other hand, prevent the steam of leakage Burn staff, improves the safety coefficient of heat preservation mechanism.

In the present embodiment, heat exchanging pipe 21 is two groups, and two groups of heat exchanging pipes 21 are along the extending direction interval of chimney 10 Setting, radiator structure 22 connect two heat exchanging pipes 21, and air inlet pipeline 31 is connected to the heat exchanging pipe 21 being located above, outlet tube Road 32 is connected to underlying heat exchanging pipe 21.In this way, above-mentioned setting can ensure steam or liquid in heat exchanging pipe 21 The smooth outflow of (steam generation liquefaction) improves the heat exchange efficiency of radiator structure 22.The structure of above structure is simple, is easy to add Work, assembly.

Specifically, when the floss hole of chimney 10 is closed, steam enters to the heat exchange being located above via air inlet pipeline 31 It in pipeline 21, is entered in radiator structure 22 by the heat exchanging pipe 21 later, and in radiator structure 22 and in chimney 10 Portion carries out heat exchange, and the steam (water) after liquefaction enters under dead weight in underlying heat exchanging pipe 21, later via Outlet tube road 32 is expelled in the melt pit 40 outside heat preservation mechanism.Repeatedly, maintain the inside of chimney 10 in specific range of temperatures, As the internal temperature of chimney 10 is not less than 15 DEG C, and the inner wall temperature of chimney 10 is not less than 10 DEG C, ensures that Bin Gaode brick glue is applied Work continuity.

As shown in Fig. 2, radiator structure 22 includes multiple intermediate conduits 221 and two transition conduits 222, two transition conduits 222 are located at the both ends of multiple intermediate conduits 221, and the heat exchanging pipe 21 being located above is changed including multiple spaced first Hot pipe section, underlying heat exchanging pipe 21 include multiple spaced second heat exchange pipeline sections, and each transition conduit 222 has phase To the first end and second end of setting, the first heat exchange pipeline section is connected to the first end of two transition conduits 222, the second heat exchange pipeline section It is connected to the second end of two transition conduits 222.In this way, above-mentioned setting can ensure the smooth of steam and water in radiator structure 22 Circulation ensures the normal operation of heat preservation mechanism, ensures construction period and the quality of Bin Gaode bricks.

Optionally, multiple intermediate conduits 221 are arranged in parallel.As shown in Fig. 2, the structure of above structure is simple, it is easily worked, And then reduce the processing cost of heat preservation mechanism.

In the present embodiment, the internal diameter of intermediate conduit 221 is more than or equal to 150mm and is less than or equal to 170mm.In this way, above-mentioned The smooth circulation of steam and water in heat preservation mechanism can be ensured by being arranged, and then improve the heat insulation effect of heat preservation mechanism.

Optionally, the internal diameter of intermediate conduit 221 is 160mm.

In the present embodiment, heat preservation mechanism further includes electric heater.Wherein, electric heater is arranged in chimney 10, and electricity adds Hot device is located at the top of heat-exchanger rig and has preset distance with dust stratification platform 11.In this way, after being powered to electric heater, electrical heating Atmosphere temperature rising at this, heating can be realized and heated to the auxiliary inside chimney 10, is further ensured that inside chimney 10 by device Construction temperature.

Specifically, electric heater selects the heating power of 30~35KW, the temporary source of neighbouring 360KW is connected to, from safety Coefficient angle considers, is preferably heated up as far as possible using heat-exchanger rig, to reach the requirement of construction temperature condition, electric heater conduct Assisted heating device.

Optionally, heat preservation mechanism further includes heat preservation member.Wherein, heat preservation member is one or more, and at least one heat preservation member is set It sets at the top outlet flue of chimney 10, to be blocked to top outlet flue.In the present embodiment, heat preservation member is multiple, and One heat preservation member is arranged at the top outlet flue of chimney 10, to be blocked to top outlet flue.In this way, heat preservation member is above-mentioned Being arranged can prevent the heat inside chimney 10 to be lost in by top outlet flue, and then it is specific to ensure that the inside of chimney 10 maintains Temperature range.

In the present embodiment, it is multiple that the inner wall of chimney 10, which has interconnecting piece, heat preservation member, and multiple heat preservation members are along chimney 10 Extending direction interval is arranged, and part heat preservation member is connect with interconnecting piece so that heat preservation member blocks the chimney 10 at this.In this way, Above-mentioned setting can be sealed the inside of chimney 10, keep the temperature, and then reduce the heat losses inside chimney 10 so that chimney 10 internal temperature maintains particular range, to meet the requirement that Bin Gaode brick glue is continuously constructed.

Optionally, multiple heat preservation members are arranged evenly and at intervals along the extending direction of chimney 10.In this way, above-mentioned setting is further The internal temperature uniformity of chimney 10 is improved, and then ensures the construction quality of Bin Gaode brick glue.

In the present embodiment, the distance between each heat preservation member L is more than or equal to 60m and is less than or equal to 80m.

In the present embodiment, heat preservation member includes supporting network, cotton-wadded quilt and flameproof fabric.Wherein, cotton-wadded quilt is laid on supporting network.It is anti- Fiery cloth is folded between supporting network and cotton-wadded quilt.In this way, the construction of Bin Gaode brick glue is up constructed from the dust stratification platform 11 of chimney 10, not It is provided with heat preservation member at the position of construction, is sealed with the inside to chimney 10, the loss of heat is reduced, preferably maintains cigarette The internal temperature of chimney 10.In work progress from the bottom up, when construction is to predetermined altitude, the heat preservation member at the height is torn open It removes, to continue to construct.

Specifically, lifting lug is welded in the inner wall of chimney 10, the steel wire side of intersecting is used between the lifting lug at sustained height Formula links together, and heat preservation member is laid on steel wire and between the inner wall of chimney 10 without clear gap.

It should be noted that heat preservation member and the fixed form of chimney 10 are without being limited thereto.Optionally, heat preservation member is blocked with chimney 10 It connects or is fastenedly connected.

In the present embodiment, it is equipped with plastic cloth on the surface of the separate supporting network of cotton-wadded quilt.In this way, above-mentioned setting can be every The disconnected external world, plays heat insulation effect.

As shown in Figure 1, heat preservation mechanism further includes gas exhaust piping 33, gas exhaust piping 33 is connected to heat exchanging pipe 21, steam energy It is enough to drain into the external world from gas exhaust piping 33.In this way, the break-make by controlling gas exhaust piping 33 and heat exchanging pipe 21, to realize heat exchanger tube Ventilation operation inside road 21.The structure of above structure is simple, is easy assembly.

Specifically, when 21 inside of heat exchanging pipe is felt suffocated or steam circulation is unsmooth, control gas exhaust piping 33 is opened With the control valve of heat exchanging pipe 21 so that gas exhaust piping 33 is connected to heat exchanging pipe 21, to realize exhaust.

In the present embodiment, the operability of heat preservation mechanism is strong, short time limit, at low cost, with obvious effects, maintenance engineering amount Small, chimney 10 can secondary use after removing.Using the technical solution of the present embodiment, 10 interior environment temperature of chimney 15 DEG C with On, the inner wall surface temperature of chimney 10 meets the requirement that Bin Gaode brick glue is continuously constructed at 10 DEG C or more.

Specifically, the heat preservation mechanism in the present embodiment is mainly used on monotubular concrete chimney, and anti-corrosion transformation uses guest High moral brick glue protective system, air inlet pipeline 31 are connected in the main pipe of boiler sootblowing steam pipeline, and air inlet pipeline 31 is using a diameter of The seamless steel pipe of 50mm is simultaneously arranged that there are two shut-off valves.26 radiator structures 22, and radiator structure are provided on dust stratification platform 11 22 intermediate conduit 221 selects the seamless steel pipe of a diameter of 160mm, gas exhaust piping 33 is installed on heat exchanging pipe 21, and two Air bleeding valve is arranged in person junction.Heat exchanging pipe 21 connect with the outlet tube road 32 of a diameter of 50mm and water is drained into desulfuration absorbing tower In neighbouring melt pit 40.In chimney 10, floss hole heat preservation outer casing closing, other side floss hole sets up scaffold, in foot hand 9 35KW electric heaters are arranged above frame, to assist heating.It is sealed entirely in the top outlet flue setting heat preservation member of chimney 10 It closes, and heat preservation member is set in 60m absolute altitudes section, 120m absolute altitude sections, be segmented patch block.Meanwhile in winter during patch block, daily timing Thermometric is carried out, the surface temperature for measuring the radiator structure 22 being arranged on dust stratification platform 11 is not less than 260 DEG C, the inside of chimney 10 Environment temperature is more than or equal to 17 DEG C, and the inner wall temperature of chimney 10 is more than or equal to 10 DEG C.Wherein, normally opened 3 to 4 of electric heater, It is remaining spare.After the technical solution of the present embodiment, the interior environment temperature of chimney 10 is at 17 DEG C or more, the interior wall temperature of chimney 10 Degree is at 10 DEG C or more, and winter construction is free of discontinuities, and construction quality is good.

It can be seen from the above description that the above embodiments of the present invention achieve the following technical effects：

Using the technical solution of the application, heat transferring medium can be entered to radiator structure by heat exchanging pipe and be tied in heat dissipation Heat exchange is carried out in structure so that radiator structure is internally heated chimney, ensures to maintain specific temperature inside chimney Range.

When constructing in winter to chimney inside, heat transferring medium circulates in heat exchanging pipe and passes through radiator structure and cigarette Heat exchange is carried out inside chimney, so that in the temperature for being suitble to construction inside chimney, and then ensure the continuity of construction, Bu Huiyou Construction speed is influenced in winter cold.

Obviously, above-mentioned described embodiment is only the embodiment of the utility model part, rather than whole realities Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work The every other embodiment obtained should all belong to the range of the utility model protection.

It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, work, device, component and/or combination thereof.

It should be noted that term " first " in the description and claims of this application and above-mentioned attached drawing, " Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that using in this way Data can be interchanged in the appropriate case, so that presently filed embodiment described herein can be in addition to illustrating herein Or the sequence other than those of description is implemented.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (15)

1. a kind of heat preservation mechanism for chimney construction, which is characterized in that including：

Heat-exchanger rig, be located at chimney (10) in, the heat-exchanger rig include heat exchanging pipe (21) and with the heat exchanging pipe (21) The radiator structure (22) of connection, the radiator structure (22) are fixed on the dust stratification platform (11) of the chimney (10), and heat exchange is situated between Matter flowing and is radiated by the radiator structure (22) in the heat exchanging pipe (21), with the inside to the chimney (10) into Row heating.

2. heat preservation mechanism according to claim 1, which is characterized in that the heat exchanging pipe (21) is along the chimney (10) Inner wall is circumferentially disposed, and the radiator structure (22) is multiple, and multiple radiator structures (22) are in the heat exchanging pipe (21) Upper interval setting.

3. heat preservation mechanism according to claim 1, which is characterized in that the heat preservation mechanism further include air inlet pipeline (31) and Outlet tube road (32), the air inlet pipeline (31) and the outlet tube road (32) are connected to the heat exchanging pipe (21) respectively, are steamed Vapour is entered to from the air inlet pipeline (31) in the heat exchanging pipe (21) and the radiator structure (22), in the radiator structure (22) through being discharged by the heat exchanging pipe (21) and from the outlet tube road (32) after liquefaction in.

4. heat preservation mechanism according to claim 3, which is characterized in that the internal diameter of the air inlet pipeline (31) is more than or equal to 50mm and be less than or equal to 100mm.

5. heat preservation mechanism according to claim 3, which is characterized in that the heat exchanging pipe (21) is two groups, and two groups of institutes It states heat exchanging pipe (21) along the extending direction interval of the chimney (10) to be arranged, be changed described in radiator structure (22) connection two Pipe line (21), the air inlet pipeline (31) are connected to the heat exchanging pipe (21) being located above, the outlet tube road (32) It is connected to the underlying heat exchanging pipe (21).

6. heat preservation mechanism according to claim 5, which is characterized in that the radiator structure (22) includes multiple intermediate conduits (221) and two transition conduits (222), two transition conduits (222) are located at multiple intermediate conduits (221) Both ends, the heat exchanging pipe (21) being located above includes multiple spaced first heat exchange pipeline sections, underlying described Heat exchanging pipe (21) includes multiple spaced second heat exchange pipeline sections, and each transition conduit (222), which has, to be oppositely arranged First end and second end, the first heat exchange pipeline section are connected to the first end of two transition conduits (222), and described second changes Hot pipe section is connected to the second end of two transition conduits (222).

7. heat preservation mechanism according to claim 6, which is characterized in that multiple intermediate conduits (221) are arranged in parallel.

8. heat preservation mechanism according to claim 6, which is characterized in that the internal diameter of the intermediate conduit (221) is more than or equal to 150mm and be less than or equal to 170mm.

9. heat preservation mechanism according to claim 1, which is characterized in that the heat preservation mechanism further includes：

Electric heater, setting in the chimney (10), the electric heater be located at the top of the heat-exchanger rig and with it is described Dust stratification platform (11) has preset distance.

10. heat preservation mechanism according to claim 1, which is characterized in that the heat preservation mechanism further includes：

One or more heat preservation members, at least one heat preservation member is arranged at the top outlet flue of the chimney (10), with right The top outlet flue is blocked.

11. heat preservation mechanism according to claim 10, which is characterized in that the inner wall of the chimney (10) has interconnecting piece, When the heat preservation member is multiple, multiple heat preservation members are arranged along the extending direction interval of the chimney (10), and part institute Heat preservation member is stated to be connect with the interconnecting piece so that the heat preservation member blocks the chimney (10) at this.

12. heat preservation mechanism according to claim 11, which is characterized in that the distance between each described heat preservation member L be more than etc. In 60m and it is less than or equal to 80m.

13. heat preservation mechanism according to claim 10, which is characterized in that the heat preservation member includes：

Supporting network；

Cotton-wadded quilt is laid on the supporting network；

Flameproof fabric is folded between the supporting network and the cotton-wadded quilt.

14. heat preservation mechanism according to claim 13, which is characterized in that the surface far from the supporting network of the cotton-wadded quilt On be equipped with plastic cloth.

15. heat preservation mechanism according to claim 1, which is characterized in that the heat preservation mechanism further includes gas exhaust piping (33), The gas exhaust piping (33) is connected to the heat exchanging pipe (21), and steam can drain into the external world from the gas exhaust piping (33).