CN217810057U

CN217810057U - High-efficient waste heat recovery forming machine

Info

Publication number: CN217810057U
Application number: CN202221486959.7U
Authority: CN
Inventors: 劳关明
Original assignee: Shaoxing Yongfeng Energy Saving Technology Co ltd
Current assignee: Shaoxing Yongfeng Energy Saving Technology Co ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-11-15
Anticipated expiration: 2032-06-15

Abstract

The utility model discloses a high-efficient waste heat recovery forming machine, including a plurality of series connection or parallelly connected heat recoverer, the preceding N festival oven of the oven body is for being equipped with the preheating section of air intake, and remaining oven divide into the several sections shaping sections that link to each other after to in the past, and every section shaping section contains 1 section to several ovens, and the air exit intercommunication of the oven on every section shaping section is connected with a corresponding heat recoverer, and the tail gas that the oven discharged on the shaping section gets into corresponding heat recoverer heat exchange cooling back and discharges, the air exit intercommunication of the oven of preheating section also is connected with a corresponding heat recoverer, and the tail gas that the oven discharged on the preheating section gets into corresponding heat exchange cooling back and discharges, and outside air gets into the oven of preheating section after one or more heat recoverer heat exchange intensifies. The utility model provides a high-efficient waste heat recovery forming machine that can high-efficient nimble utilization when reducing thermal emission extravagant.

Description

High-efficient waste heat recovery forming machine

Technical Field

The utility model relates to a high-efficient waste heat recovery forming machine belongs to forming machine equipment technical field.

Background

The setting machine is an important device for finishing after printing and dyeing textiles, can improve the hand feeling, slippage, color, breadth, strength, appearance and the like of textiles, is applied to various textile varieties, can play a role in stabilizing the size of cloth after being finished by the setting machine, is also a main energy consumption device in the textile printing and dyeing industry, is a device for drying and finishing the textiles and setting the textiles by utilizing hot air, and mainly comprises a drying box body, a cloth roll conveying device and the like, wherein the drying box body is formed by sequentially connecting and combining a plurality of drying boxes from front to back, each drying box is provided with a hot air circulating device, a heating device, an exhaust duct and an air supplementing inlet which are relatively independent, and the textiles have moisture before entering the drying box body of the setting machine and contain additives such as printing and dyeing auxiliaries and the like which are remained in the weaving process, the temperature of hot air in the drying box body of the setting machine is about 200 ℃, so when textile fabrics pass through the drying box body of the setting machine, tail gas generated by high-temperature baking contains a large amount of water vapor, high-temperature evaporated dye and auxiliary organic matters, vaporized solvent, fine flock fibers and other mechanical impurities, the tail gas still keeps a higher temperature about 170 ℃, the impurities contained in the tail gas such as direct recycling can pollute the fabrics, heat recovery and recycling are generally carried out by a heat exchange body, cold air of the existing setting machine generally enters the drying box of the setting section after being heated up by once heat exchange, on one hand, the heat of the tail gas is difficult to be fully and effectively recovered according to actual conditions, on the other hand, the temperature difference between the heated cold air and the temperature in the setting section is large, which is not beneficial to the stability of the temperature, and the setting effect is influenced.

Disclosure of Invention

The utility model aims to solve the technical problem that a be used for a high-efficient waste heat recovery forming machine is provided, cold air can carry out heat exchange recovery tail gas's heat and use as the early hot-air of forming machine once or many times according to actual need, does benefit to the stability of temperature when reducing thermal emission waste, can solve the not enough of prior art.

The technical scheme of the utility model is that: a high-efficiency waste heat recovery setting machine comprises a drying box body formed by sequentially arranging a plurality of drying boxes from front to back, wherein an air outlet is formed in each drying box body and comprises a plurality of heat recoverers connected in series or in parallel, the front N drying boxes of each drying box body are preheating sections provided with air inlets, the rest drying boxes are divided into a plurality of connected setting sections from front to back, each setting section comprises 1 to a plurality of drying boxes, the air outlet of each drying box on each setting section is communicated with and connected with a corresponding heat recoverer, tail gas discharged by the drying boxes on the setting sections enters the corresponding heat recoverers to perform heat exchange cooling and then is discharged, the air outlet of the drying boxes on the preheating sections is also communicated with and connected with a corresponding heat recoverer, tail gas discharged by the drying boxes on the preheating sections enters the corresponding heat recoverers to perform heat exchange cooling and then is discharged, and outside air is heated by one or more heat recoverers to enter the drying boxes of the preheating sections.

And a detachable filter screen is arranged at the air outlet of each section of the oven.

The heat recovery device comprises a base and a plurality of heat exchange bodies arranged on the base, wherein the plurality of heat exchange bodies comprise outer shells and a plurality of heat exchange tubes vertically arranged in the shells, and channels for communicating the plurality of heat exchange bodies are arranged in the base.

Furthermore, a group of tube plates with evenly distributed tube holes are arranged in the shell of the heat exchange body, a plurality of heat exchange tubes are arranged between the two tube plates and are respectively communicated with the corresponding tube holes, part or all of the heat exchange tubes are metal thin tubes with the wall thickness not more than 1mm, connecting tube sleeves are inserted into two ends of each metal thin tube, and the connecting tube sleeves at the two ends are welded or are fixed at the corresponding tube holes of the corresponding tube plates through expansion of tube expanders.

And a further part of the heat exchange tubes are thick metal tubes with the wall thickness not less than 1.5mm, and two ends of each thick metal tube are welded or are fixed at corresponding tube holes of the corresponding tube plates through expansion joint of tube expanders so as to support the tube plates.

And further, after the connecting pipe sleeve is fixed on the pipe plate, the connecting end of the connecting pipe sleeve and the thin metal pipe is positioned on the inner side of the pipe plate, and the thin metal pipe is inserted into the pipe of the thin metal pipe or inserted into the pipe of the thin metal pipe.

Furthermore, the connecting surface of the connecting pipe sleeve and the thin metal pipe in an inserting fit mode is a guiding conical surface.

And the other end of the connecting pipe sleeve comprises a convex edge, and when the connecting pipe sleeve is inserted in the pipe hole of the pipe plate, the convex edge and the outer side of the pipe plate limit stop are connected.

Further, the heat exchange tube is a spiral tube with an inner wall and an outer wall both provided with extrusion, and two ends of the spiral tube are connecting ends without spiral extrusion.

The heat recovery device comprises a waste heat inlet, a waste heat outlet, a cold air inlet and a hot air outlet, the lifting frame is connected with a ventilation pipe which is matched and communicated with the waste heat inlet, the waste heat outlet, the cold air inlet and the hot air outlet, and the ventilation pipe comprises a soft connection section.

Furthermore, an isolating device is arranged between the preheating section and the shaping section adjacent to the preheating section, and the isolating device separates the upper space and the lower space of the oven except the cloth.

Through implementing the utility model discloses, the tail gas of preheating section oven discharges after corresponding heat recoverer heat transfer cooling, the tail gas of the oven of several sections shaping sections also discharges after corresponding heat recoverer heat transfer cooling respectively, heat recoverer and heat recoverer series connection or parallelly connected and with the oven on the preheating section air inlet intercommunication, outside air makes the hot-air use in earlier stage in getting into the oven of preheating section after one or more heat recoverer heat transfer intensification according to practical need, in order to replace heating device, its difference in temperature with the preheating section is also less, do benefit to the stability of holding the temperature when reducing the high-efficient nimble utilization of thermal emission waste energy.

Drawings

Fig. 1 is a first connection diagram of the present invention;

FIG. 2 is a second connection diagram of the present invention;

fig. 3 is a third connection diagram of the present invention;

FIG. 4 is a schematic structural view of the first heat exchanging body and the second heat exchanging body;

FIG. 5 is a schematic view of a heat exchange body;

FIG. 6 is an enlarged view of FIG. 5 at B;

FIG. 7 is a schematic view of the external socket joint of the heat exchange tube and the connecting tube sleeve;

FIG. 8 is a schematic view of the inner socket of the heat exchange tube and the connecting tube sleeve;

FIG. 9 is a first schematic view of a connecting sleeve;

FIG. 10 is a second schematic view of a connecting sleeve;

fig. 11 is a third schematic view of a connecting sleeve.

Shown in the figure: an oven 1; a preheating section 2; shaping sections 3, 3A; heat recovery units 4, 4A, 4B; a filter screen 6; a base 7;

heat exchange bodies

8, 8A; a housing 9;

tube sheets

10, 10A; a thin metal tube 13; a connecting pipe sleeve 14; an inner wall surface 15; an outer wall surface 16; an outer convex edge 17; a partition 18; a tube hole fitting section 19; a lifting frame 20; a cold air inlet 21; a hot air outlet 22; a waste heat inlet 23; a waste heat outlet 24; an isolation device 25; a dead point 26.

Detailed Description

The embodiment of the utility model discloses an: a high-efficiency waste heat recovery setting machine is disclosed in figures 1 to 3, and comprises a front drying box body which is formed by sequentially drying a plurality of drying boxes from front to back, the drying box body is a 10-section drying box in the embodiment, the drying box 1 is provided with an air outlet, the 1 st to 3 rd drying boxes 1 of the drying box body are preheating sections 2 provided with air inlets, the 4 th to 7 th drying boxes and the 8 th to 10 th drying boxes are two sections of setting sections 3 and 3A which are connected, heating devices are arranged in the drying boxes of the setting sections 3 and 3A and are radiators or burners which are used by the setting machine conventionally, the air outlet of the drying box on the setting section 3 is communicated and connected with a heat recoverer 4, tail gas exhausted from the drying box on the setting section 3 is cooled by heat exchange through the heat recoverer 4, the air outlet of the drying box on the setting section 3A is communicated and connected with the heat recoverer 4A, the tail gas exhausted from the drying box on the setting section 3A is cooled by heat exchange through the heat recoverer 4A, the air outlet of the drying box on the setting section 2 is communicated and connected with a heat recoverer 4B, the tail gas exhausted after being cooled by heat exchange through the heat exchanger 4B, the heat recoverer 4B is exhausted, and is communicated with the upper air inlet of the drying box 2 and connected with the heat recoverer 4A in series and connected with the drying box 2, according to actual needs, the outside air can enter the preheating section 2 to be used as early-stage hot air through one of the heat recoverers 4, 4A and 4B for heating through once heat exchange or through two of the heat recoverers for heating through twice heat exchange, the temperature of hot air entering a drying oven in front of the preheating section 2 is lower than that of hot air entering a drying oven at the back by replacing a heating device, so that the drying oven in the preheating section 2 is gradually heated, the specific connection mode can be as shown in figure 1, and external air can pass through a heat recoverer 4B for primary heat exchange and then pass through a heat recoverer 4 or a heat recoverer 4A for secondary heat exchange and then respectively enter drying ovens in sections 1-2 of the preheating section 2; as shown in fig. 2, the outside air enters the 1 st section of oven of the preheating section 2 after passing through the heat recovery device 4B for once heat exchange, and enters the 2 nd section of oven of the preheating section 2 after passing through the heat recovery device 4 and then passing through the heat recovery device 4A for twice heat exchange; as shown in fig. 3, the external air enters the 1 st section of oven of the preheating section 2 after being subjected to primary heat exchange by the heat recoverer 4B, enters the 2 nd section of oven of the preheating section 2 after being subjected to heat exchange by the heat recoverer 4A, enters the 3 rd section of oven of the preheating section 2 after being subjected to heat exchange by the heat recoverer 4A, because the temperature of the hot air in the shaping sections 3 and 3A is generally about 200 ℃, and the temperature of the hot air in the preheating section 2 is lower than 200 ℃, the temperature of the external air entering the preheating section 2 after being subjected to heat exchange and temperature rise by the external air is lower than the temperature of the external air after being subjected to heat exchange by the heat recoverer 4B, according to the characteristics, the heat recoverer 4B and the heat recoverers 4 and 4A are connected in series and in parallel, so that the temperature of hot air entering a front oven of the preheating section 2 is lower than that of hot air entering a rear oven, the waste of heat emission is reduced, the heat recoverers 4, 4A and 4B can be efficiently and flexibly utilized, and in addition, in order to reduce the heat loss of a pipeline, the heat recoverers 4, 4A and 4B are arranged above or beside the corresponding shaping sections 3 and 3A and the preheating section 2 due to the fact that the distance lengths of exhaust pipes and heating pipes which are connected are shortened as much as possible.

The detachable filter screen 6 is installed to every section of further air outlet department of oven 1, carries out prefilter to tail gas, reduces the risk that the heat exchanger blockked up.

As further shown in fig. 4 to 6, the heat recovery device 4, 4A, 4B includes a base 7 and a plurality of

heat exchange bodies

8, 8A installed on the base 7, in this embodiment, the number of the

heat exchange bodies

8, 8A is two, each of the

heat exchange bodies

8, 8A includes an external casing 9 and a plurality of heat exchange tubes vertically installed in the casing 9, a channel for communicating the heat exchange tubes of the two heat exchange tubes 8 is provided in the base 7, a valve and an access hole are provided on the base 7, when in use, high-temperature tail gas enters the channel of the base 7 through the heat exchange tube of the heat exchange body 8 and then is discharged from another heat exchange tube of the heat exchange body 8A, external air exchanges heat with the high-temperature tail gas in the heat exchange tube in the casing 9, enters the heat exchange body 8 from the heat exchange body 8A to heat up, and then enters the preheating section 2 of the oven body, the heat exchange tubes are vertically arranged, condensed water, organic matters, dye and auxiliaries in the cooled tail gas flow into the channel of the base 7 along the heat exchange tube, the condensed water can be discharged through the valve, in order to prevent blockage of the access hole, and other impurities accumulated and can be periodically cleaned up through the access hole.

The heat exchange tube used in this embodiment is a thin metal tube 13 with a wall thickness of not more than 1mm, the thin metal tube 13 preferably has a wall thickness of 0.2 mm to 0.5 mm, and can be made of stainless steel, copper, aluminum, titanium, and the like, wherein the wall thickness of the stainless steel material is the best 0.35mm, the two ends of the thin metal tube 13 are respectively inserted with a connecting tube sleeve 14, the connecting tube sleeves 14 at the two ends are welded or fixed at the corresponding tube holes of the

tube plates

10 and 10A through tube expansion, the thin metal tube 13 has lower material cost, and the heat exchange efficiency is improved because the heat exchange area in unit cross-sectional area is increased, because the two ends are inserted with the connecting tube sleeves 14 welded or fixed at the corresponding tube holes of the corresponding tube plates through tube expansion, the thin metal tube 13 is not directly welded or used with a tube expansion device, so that the thin metal tube 13 does not have the condition of burning through or expansion.

Preferably, as shown in fig. 7 to 8, after the connecting pipe sleeve 14 is fixed on the

pipe plates

10 and 10A, the connecting end of the connecting pipe sleeve 14 and the thin metal pipe 13 is positioned on the inner sides of the

pipe plates

10 and 10A, the connecting pipe sleeve 14 exceeds the inner sides of the

pipe plates

10 and 10A by a certain length, the thin metal pipe 13 can be inserted into the pipe of the thin metal pipe or inserted into the pipe of the thin metal pipe as required, and the connection is more flexible.

Preferably, the inner wall surface 15 and the outer wall surface 16 of the connecting end of the connecting sleeve 14 and the thin metal pipe 13 are guiding conical surfaces, and as shown in fig. 9, the outer wall surface 16 is a guiding conical surface; as shown in fig. 10, the inner wall surface 15 is a guiding tapered surface; as shown in fig. 11, the inner wall surface 15 and the outer wall surface 16 are both guiding conical surfaces, which play a guiding role when inserting and inserting the metal thin tube 13 in the tube or inserting and inserting the metal thin tube out of the tube, so that the connection is convenient to align and match, and the connection is basically air-air heat exchange in the printing and dyeing industry, and does not require high sealing performance, so that the connection tube sleeve 14 and the metal thin tube 13 can be directly inserted and connected, and certainly, in order to improve the sealing performance, the connection between the two can be bonded by using an adhesive.

Preferably, the other end of the connecting pipe sleeve 14 comprises an outer convex edge 17, the middle section of the connecting pipe sleeve 14 is a pipe hole matching section 19, a step-shaped stop point 26 is formed between the pipe hole matching section 19 and the guide conical surface, when the connecting pipe sleeve 14 is connected with the pipe holes of the

pipe plates

10 and 10A through the middle pipe hole matching section 19, the outer convex edge 17 is limited and stopped with the outer sides of the

pipe plates

10 and 10A, and the stop point 26 can stop the metal thin pipe 13, so that the connecting pipe sleeve 14 can be placed at a specific position of the pipe holes on the

pipe plates

10 and 10A, and the accurate placement of the connecting pipe sleeve 14 is facilitated for subsequent welding or expansion joint fixing through a pipe expander.

Preferably, the metal thin tube 13 is a spiral tube with an extruded inner wall and an extruded outer wall; the pipe wall forms a spiral through extrusion, the two ends of the spiral pipe are provided with spirally extruded connecting ends, so that the spiral pipe can be conveniently and tightly connected with the connecting pipe sleeve 14 or pipe holes of the

pipe plates

10 and 10A, the spiral pipe is adopted, on one hand, the heat exchange area is increased, on the other hand, the medium can cause disturbance when passing through the spiral pipe, the rotary circulation is generated, and the heat exchange efficiency of two media inside and outside the pipe is further improved.

Preferably, a plurality of partition plates 18 positioned between the metal thin tubes 13 are installed in the shell 9, the plurality of partition plates 18 guide the medium positioned outside the metal thin tubes 13 to convey the medium in a serpentine shape, so that the distance and the time of heat exchange of the medium in the heat exchanger are prolonged, the heat exchange efficiency is improved, meanwhile, the partition plates 18 also have the reinforcing effect on the heat exchange tube, and particularly, the metal thin tubes 13 are easily deformed due to the thin tube walls, and are reinforced by the partition plates 18, so that the deformation resistance is improved.

Preferably, the heat recovery device comprises a lifting frame 20 capable of being adjusted in a lifting mode, the heat recovery device 4B or the heat recovery device 4A, 4A comprising a base 7 and a plurality of

heat exchange bodies

8 and 8A arranged on the base 7 is a whole body provided with a cold air inlet 21, a cold air outlet 22, a hot air inlet 23 and a hot air outlet 24, the cold air inlet 21, the cold air outlet 22, the hot air inlet 23 and the hot air outlet 24 are respectively and flexibly connected with ventilation pipelines, the ventilation pipelines are arranged on the lifting frame 20 and can be lifted up and down through the lifting frame 20, each ventilation pipeline can move up and down to be conveniently detached from the heat recovery device 4B or the heat recovery device 4 and 4A, and the heat recovery device 4B or the heat recovery device 4 and 4A can be conveniently replaced and cleaned.

The heat recovery device further comprises a lifting frame 20 capable of being adjusted in a lifting mode, the heat recovery devices 4, 4A and 4B comprise a waste heat inlet 23, a waste heat outlet 24, a cold air inlet 21 and a hot air outlet 22, the lifting frame 20 is connected with ventilation pipes which are communicated with the waste heat inlet 23, the waste heat outlet 24, the cold air inlet 21 and the hot air outlet 22 in a matched mode, the ventilation pipes comprise soft connection sections, tail gas enters from the waste heat inlet 23, is subjected to heat exchange and temperature reduction and then is discharged from the waste heat outlet 24, outside air enters from the cold air inlet 21, is subjected to heat exchange and temperature rise and then enters from the hot air outlet 22 into the preheating section 2 oven, one section of the ventilation pipes is a telescopic threaded pipe and serves as the soft connection section, the ports of the waste heat inlet 23, the waste heat outlet 24, the cold air inlet 21 and the hot air outlet 22 and corresponding tail end ventilation pipes are provided with matched connectors, the lifting frame 20 is lifted, and the ventilation pipes provided with the soft connection sections can be telescopic to be connected and disassembled with the waste heat inlet 23, the waste heat outlet 24, the cold air inlet 21 and the hot air outlet 22, and the heat recovery devices, and the hot air recovery devices are convenient to replace, and clean 4A and 4B.

Preferably, as shown in fig. 3, an isolating device 25 is arranged between the preheating section 2 and the adjacent shaping section 3 or between the adjacent ovens of the preheating section 2, the isolating device 25 separates the upper space and the lower space of the ovens except for the cloth, the temperature in the preheating section 2 is relatively low due to the high temperature of the shaping sections 3 and 3A, and the heat of the shaping sections 3 and 3A is reduced to flow to the preheating section 2 by the isolating device 25, so as to improve the shaping efficiency.

The second embodiment of the present invention is different from the first embodiment in that the heat exchange tube portion of the heat exchange body is a thick metal tube with a wall thickness not less than 1.5mm, two ends of the heat exchange tube portion are directly welded or fixed at corresponding tube holes of the

tube sheets

10 and 10A by expander expansion, because the number of the heat exchange tubes in the heat exchanger can reach tens or hundreds, the tube holes are distributed on the

tube sheets

10 and 10A, if the

tube sheets

10 and 10A are not supported, the heat exchange tubes are deformed due to insufficient strength, if the used heat exchange tubes are all thin metal tubes 13, the thin metal tubes are only inserted into the corresponding tube holes of the

tube sheets

10 and 10A by the connecting tube sleeve 14, and the strength of the thin metal tubes is insufficient, the second embodiment can not support the heat exchange tubes, the number of the thick metal tubes is not more and the number and the connecting position can be selected according to actual requirements, if the thick metal tubes are fixed at the corresponding tube holes of the

tube sheets

10 and 10A by the expander, the thick metal tubes can be fixed at the corresponding tube holes of the

tube sheets

10 and 10A, the tube sheets 10A so as to support the tubes without deformation, the number of the thick metal tubes is not more than 4, and the other four metal tubes can be installed at the same positions, if the other four metal tubes are no more than 3, the same as the first embodiment, the first embodiment can be installed at the same as the thick metal tubes.

What has just been said above is the preferred embodiment of the present invention, so all according to the utility model discloses a patent application scope structure, characteristic and principle do equivalent change or modify, all include the utility model discloses a patent application scope.

Claims

1. The utility model provides a high-efficient waste heat recovery forming machine, includes the oven body of compriseing multisection oven from the past to back range in proper order, is equipped with the air exit on the oven, its characterized in that: the drying oven comprises a plurality of heat recoverers which are connected in series or in parallel, wherein the front N sections of drying ovens of the drying oven body are preheating sections provided with air inlets, the rest drying ovens are divided into a plurality of sections of shaping sections which are connected from front to back, each section of shaping section comprises 1 section to a plurality of drying ovens, air outlets of the drying ovens on each section of shaping section are communicated and connected with a corresponding heat recoverer, tail gas discharged by the drying ovens on the shaping sections enters the corresponding heat recoverers to be discharged after being cooled through heat exchange, air outlets of the drying ovens on the preheating sections are also communicated and connected with one corresponding heat recoverer, tail gas discharged by the drying ovens on the preheating sections enters the corresponding heat recoverers to be discharged after being cooled through heat exchange, and outside air enters the drying ovens of the preheating sections after being heated through heat exchange of one or more heat recoverers.

2. The high-efficiency waste heat recovery setting machine according to claim 1, characterized in that: the heat recovery device comprises a base and a plurality of heat exchange bodies arranged on the base, each heat exchange body comprises an outer shell and a plurality of heat exchange tubes vertically arranged in the shell, and a plurality of channels communicated with the heat exchange bodies are arranged in the base.

3. The efficient waste heat recovery setting machine according to claim 2, wherein: the heat exchanger is characterized in that a group of tube plates with tube holes uniformly distributed are arranged in a shell of the heat exchanger, a plurality of heat exchange tubes are arranged between the two tube plates and are respectively communicated with the corresponding tube holes, part or all of the heat exchange tubes are thin metal tubes with the wall thickness not greater than 1mm, two ends of each thin metal tube are respectively inserted with a connecting tube sleeve, and the connecting tube sleeves at the two ends are welded or are fixed at the corresponding tube holes of the corresponding tube plates through expansion of a tube expander.

4. The high-efficiency waste heat recovery setting machine according to claim 3, characterized in that: and part of the heat exchange tubes are thick metal tubes with the wall thickness not less than 1.5mm, and two ends of each thick metal tube are welded or are fixed at corresponding tube holes of the corresponding tube plates through expansion joint of tube expanders so as to support the tube plates.

5. The high-efficiency waste heat recovery setting machine according to claim 3 or 4, characterized in that: the connecting pipe sleeve is fixed on the pipe plate, the connecting end of the connecting pipe sleeve and the thin metal pipe is positioned on the inner side of the pipe plate, and the thin metal pipe is inserted into the pipe of the thin metal pipe or inserted into the pipe of the thin metal pipe.

6. The efficient waste heat recovery setting machine according to claim 5, wherein: the connecting surface of the connecting pipe sleeve and the thin metal pipe in the inserting and matching mode is a guiding conical surface.

7. The high-efficiency waste heat recovery setting machine according to claim 5, characterized in that: the other end of the connecting pipe sleeve comprises a convex edge, and the convex edge and the outer side of the pipe plate limit stop are arranged when the connecting pipe sleeve is inserted in the pipe hole of the pipe plate.

8. The machine of claim 3 or 4, wherein the machine comprises: the heat exchange tube has extruded spiral pipes for inner wall and outer wall, the spiral pipe both ends are for not having spiral extruded link.

9. The efficient waste heat recovery setting machine according to claim 2, wherein: the heat recovery device comprises a lifting frame capable of being adjusted in a lifting mode, the heat recovery device comprises a waste heat inlet, a waste heat outlet, a cold air inlet and a hot air outlet, the lifting frame is connected with a ventilation pipe which is communicated with the waste heat inlet, the waste heat outlet, the cold air inlet and the hot air outlet in a matched mode, and the ventilation pipe comprises a soft connection section.

10. The efficient waste heat recovery setting machine according to claim 1, wherein: an isolating device is arranged between the preheating section and the shaping section adjacent to the preheating section, and the isolating device separates the upper space and the lower space of the oven except for the cloth.