CN217104498U - Thermal cycle energy-saving papermaking system - Google Patents

Abstract

The application relates to an energy-conserving papermaking system of thermal cycle, it includes high temperature steam generator, the high temperature dryer, steam ejector and low temperature dryer, high temperature steam generator, the high temperature dryer, connect through a plurality of steam conduit between steam ejector and the low temperature dryer, every steam conduit all includes many interconnect's subsection pipe, per two adjacent and interconnect's subsection pipe is equipped with the caulking groove of embedding portion and confession embedding portion embedding respectively, all realize connecting through the cooperation of embedding portion and caulking groove between per two subsection pipes. Set up every steam conduit and form by many section pipe concatenations, compare in the mode of two devices of single steam conduit connection, the mode of many section pipe concatenations can be according to the connection demand between the different devices, freely adjusts the quantity of section pipe and the angle between two arbitrary interconnect's section pipe, increases the controllability to steam conduit length and angle, improves steam conduit's connection problem.

Description

Thermal cycle energy-saving papermaking system

Technical Field

The application relates to the technical field of papermaking, in particular to a thermal cycle energy-saving papermaking system.

Background

The energy consumption of the paper making industry is very large, and the heat energy consumption accounts for about 15% of the paper making cost, so that a heat pump is generally adopted in the industry to reduce the heat energy loss in the production process, so that the low-enthalpy heat energy is fully utilized, and the purpose of saving energy is achieved. When the existing drying cylinder is used, steam is conveyed to the drying cylinder through the heat pump, and heat is transferred to paper through the drying cylinder, so that the paper is dried.

In the prior art, there is a thermal cycle energy-saving papermaking system, which comprises a high-temperature steam generator, a high-temperature drying cylinder, a steam ejector, a low-temperature drying cylinder and the like. The exhaust end of the high-temperature steam generator is connected with the high-pressure air inlet end of the steam ejector and the air inlet end of the high-temperature drying cylinder through steam pipelines respectively, the air outlet end of the high-temperature drying cylinder is connected with the low-pressure air inlet end of the steam ejector through a steam pipeline, and the steam ejector is connected with the low-temperature drying cylinder through a steam pipeline. High-temperature steam of the high-temperature steam generator is supplied to the steam ejector, the high-temperature steam generator is combined with secondary steam discharged by the high-temperature drying cylinder, and the low-temperature drying cylinder is subjected to steam supply through the steam ejector, so that waste of the steam is reduced.

However, each device in the whole thermal cycle energy-saving papermaking system needs to be connected with one or more other devices at the same time, and the whole pipeline arrangement is complex, so that the requirements on the length and the angle of the steam pipeline are high, and when the length or the angle of the steam pipeline is inappropriate, the connection between different devices is inconvenient and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to improve the connection problem of steam pipelines, the application provides a thermal cycle energy-saving papermaking system.

The application provides a thermal cycle energy-saving papermaking system, adopts following technical scheme:

the utility model provides an energy-conserving papermaking system of thermal cycle, includes high temperature steam generator, high temperature dryer, steam ejector and low temperature dryer, connect its characterized in that through a plurality of steam conduit between high temperature steam generator, high temperature dryer, steam ejector and the low temperature dryer: every steam conduit all includes many interconnect's merogenesis pipe, and per two adjacent and interconnect's merogenesis pipe is equipped with the caulking groove of embedding part and confession embedding part embedding respectively, all realizes connecting through the cooperation of embedding part and caulking groove between per two merogenesis pipes.

Through the technical scheme, it forms by many subsection pipe concatenations to set up every steam conduit, compare in the mode of two devices of single steam conduit connection, the mode of many subsection pipe concatenations can be according to the connection demand between the different devices, freely adjust the quantity of subsection pipe and the angle between two arbitrary interconnect's subsection pipe, thereby realize the length and the regulation of angle to the steam conduit that the concatenation formed, increase the controllability to steam conduit length and angle, better satisfy the connection demand between the different devices, improve steam conduit's connection problem.

Optionally, the embedding part is located at one axial end of the sectional pipe, the embedding part is cylindrical, and a plurality of embedding blocks are uniformly distributed on the circumferential outer wall of the embedding part;

the caulking groove is the circular slot, the caulking groove is located the axial one end of sectional pipe, the circumference lateral wall of caulking groove has a plurality of butt pieces around axis evenly distributed, all is equipped with the breach that supplies the abaculus to pass through between per two adjacent butt pieces, and the breach quantity on every caulking groove all is the same with the abaculus quantity in every embedding portion, and every the butt piece all forms the chamber that slides that supplies the abaculus to pass through between the terminal surface of caulking groove tank bottom and the caulking groove tank bottom.

Through above-mentioned technical scheme, set up abaculus and breach, when two segmental pipes need be connected, aim at a plurality of breachs with a plurality of abaculus on the embedding portion one by one for the abaculus one-by-one staggers one by one through the breach of correspondence and the one end butt of embedding portion orientation caulking groove tank bottom in the caulking groove tank bottom, rotatory segmental pipe makes a plurality of abaculus and a plurality of breach, accomplishes the high-speed joint of two segmental pipes, improves the connection efficiency between the segmental pipe.

Optionally, the tank bottom of caulking groove is coaxial to be equipped with first sealed annular, coaxial being equipped with first elasticity sealing washer in the first sealed annular, first elasticity sealing washer is used for butt embedding portion to correspond the terminal surface of caulking groove towards.

Through above-mentioned technical scheme, set up first elastic sealing ring for first elastic sealing ring butt improves the leakproofness between two interconnect's the merogenesis pipe in the terminal surface of embedding portion orientation caulking groove tank bottom.

Optionally, the tank bottom of caulking groove is coaxial to be equipped with the sealed annular of second, the diameter of the sealed annular of second is greater than first sealed annular, the sealed annular of second is coaxial to be equipped with second elastic sealing ring, second elastic sealing ring is used for the butt abaculus orientation to correspond the terminal surface of caulking groove.

Through above-mentioned technical scheme, set up second elastic sealing ring, when two segmental pipes interconnect, second elastic sealing ring supports tightly in the terminal surface of abaculus orientation caulking groove tank bottom, improves the leakproofness between two interconnect's segmental pipes.

Optionally, a fastening bolt penetrates through the sectional pipe, the fastening bolt penetrates through the circumferential side wall of the caulking groove and extends into the caulking groove, and the fastening bolt is located between the fastening block and the bottom of the caulking groove along the axial direction of the caulking groove;

the circumferential end wall of the embedded part is provided with a propping groove;

when the two section pipes are connected and the embedding part is embedded into the embedding groove, the abutting bolt abuts against the abutting groove to limit the relative rotation of the two section pipes.

Through above-mentioned technical scheme, set up and support tight bolt and support tight groove, restrict the rotation each other between two interconnect's subsection pipe, improve the stability of connecting between the subsection pipe.

Optionally, a plurality of abutting bolts are arranged on the sectional pipes, and the plurality of abutting bolts on each sectional pipe are uniformly distributed in the circumferential direction;

the plurality of abutting grooves are formed in the circumferential end wall of the embedding part, and the plurality of abutting grooves are uniformly distributed in the circumferential end wall of the embedding part along the circumferential direction;

when the two segmental pipes are connected with each other, the plurality of abutting bolts abut against the plurality of abutting grooves in a one-to-one correspondence manner.

Through above-mentioned technical scheme, set up many and support tight bolt and a plurality of tight groove of supporting for the connection between the segmental pipe is more stable.

Optionally, each abutting block is provided with a positioning block for abutting against the insert block towards one end of the corresponding caulking groove bottom, and the position of each positioning block on each abutting block is the same.

Through above-mentioned technical scheme, set up the locating piece, at the in-process of two subsection pipe interconnect, relative rotation is done around the caulking groove axis to the breach and the embedding portion that the abaculus one-to-one passes through the correspondence, supports when leaning on in the locating piece when the abaculus, can't continue to rotate around the rotation direction before between two subsection pipes, and a plurality of abaculus and a plurality of breach stagger one by one this moment, through the locating piece, realize quick pre-connection between two subsection pipes, improve the connection efficiency between two subsection pipes.

Optionally, the joint between every two sectional pipes is sleeved with a heat insulation sleeve, and the heat insulation sleeve is made of an elastic material.

Through above-mentioned technical scheme, set up the radiation shield, reduce the dispersion and loss of the branch pipe at the in-process steam heat of transportation steam, improve the thermal insulation performance of branch union coupling department.

Optionally, each inner ring of the heat insulation sleeve is provided with two annular abutting parts, each section pipe is provided with an annular abutting groove, and the two annular abutting parts on each heat insulation sleeve are respectively embedded into the two annular abutting grooves on the two section pipes connected with the heat insulation sleeve;

every the both ends of radiation shield cover axis direction all are equipped with the clamp that is used for cramping the radiation shield cover.

Through above-mentioned technical scheme, set up annular butt portion and annular and support tight groove, support tight groove through annular butt portion embedding annular, increase the area of contact between radiation shield cover and the subregion pipe, reinforcing heat preservation effect.

In summary, the present application includes at least one of the following beneficial technical effects:

(1) compared with a mode that a single steam pipeline is connected with two devices, the mode of splicing the multiple section pipes can freely adjust the number of the section pipes and the angle between any two connected section pipes according to the connection requirements between different devices, so that the length and the angle of the steam pipeline formed by splicing can be adjusted, the controllability of the length and the angle of the steam pipeline is increased, the connection requirements between different devices are better met, and the connection problem of the steam pipeline is improved;

(2) by arranging the embedded blocks and the notches, when two sectional pipes need to be connected, the embedded blocks on the embedded parts are aligned to the notches one by one, so that the embedded blocks pass through the corresponding notches one by one, one ends of the embedded parts facing the bottoms of the embedded grooves are abutted to the bottoms of the embedded grooves, the sectional pipes are rotated to enable the embedded blocks to be staggered with the notches one by one, the quick connection of the two sectional pipes is completed, and the connection efficiency between the sectional pipes is improved;

(3) through setting up the radiation shield, reduce the pipe in the heat loss of steam of the in-process of transportation steam of subsection, improve the thermal insulation performance of the pipe connection department of subsection.

Drawings

Fig. 1 is a system diagram of the present embodiment.

Fig. 2 is a schematic view of the steam pipeline structure of the present embodiment.

Fig. 3 is an exploded view of the steam pipeline according to the present embodiment.

Fig. 4 is an enlarged view of the structure of the insertion portion and the insertion groove of the present embodiment.

Fig. 5 is an enlarged schematic view of the first seal ring groove and the second seal ring groove of the present embodiment.

Reference numerals: 1. a high temperature steam generator; 2. a high temperature dryer; 3. a steam ejector; 4. an evaporator; 5. a low temperature dryer; 6. a steam line; 61. a sectioned pipe; 7. an insertion section; 8. caulking grooves; 9. an insert block; 10. a butting block; 11. a notch; 12. positioning blocks; 13. tightly abutting against the screw hole; 14. tightly abutting against the bolt; 15. abutting against the groove; 16. a first seal ring groove; 17. a second seal ring groove; 18. a first elastic sealing ring; 19. a second elastic sealing ring; 20. a heat insulating sleeve; 21. an annular abutment; 22. an annular abutment groove; 23. and (5) clamping a hoop.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a thermal cycle energy-saving papermaking system.

Referring to fig. 1, there are included a high temperature steam generator 1, a high temperature drying cylinder 2, a steam injector 3, an evaporator 4, and a low temperature drying cylinder 5.

The exhaust end of the high-temperature steam generator 1 is connected with two steam pipelines 6, and the two steam pipelines 6 connected to the high-temperature steam generator 1 are respectively connected with the air inlet end of the high-temperature drying cylinder 2 and the high-pressure air inlet end of the steam ejector 3.

The exhaust end of the high-temperature drying cylinder 2 is connected with two steam pipelines 6, and the two steam pipelines 6 connected to the high-temperature drying cylinder 2 are respectively connected with the water inlet end of the evaporator 4 and the low-pressure air inlet end of the steam ejector 3.

The exhaust end of the evaporator 4 is connected with a steam pipeline 6, and the steam pipeline 6 connected with the evaporator 4 is connected with the low-pressure air inlet end of the steam ejector 3.

The drainage end of the evaporator 4 is connected with a conveying pipeline, one end of the conveying pipeline, which is far away from the evaporator 4, is connected with the water inlet end of the high-temperature steam generator 1, and the water inlet end of the high-temperature steam generator 1 is communicated with an external pipeline to be used for introducing external water resources.

The exhaust end of the steam ejector 3 is connected with a steam pipeline 6, and the steam pipeline 6 of the steam ejector 3 is connected with the air inlet end of the low-temperature drying cylinder 5.

In the actual use process, the high-temperature steam generator 1 respectively conveys high-temperature steam to the high-temperature drying cylinder 2 and the steam ejector 3 through two steam pipelines 6 connected with the high-temperature steam generator; after the high-temperature drying cylinder 2 uses the high-temperature steam for drying paper, the generated secondary steam is discharged from the exhaust end of the high-temperature drying cylinder 2, the discharged secondary steam is sent to the low-pressure air inlet end of the steam ejector 3 to be mixed with the high-temperature steam, and the generated mixed steam is sent to the low-temperature drying cylinder 5 for secondary utilization; the liquid water generated by the high-temperature drying cylinder 2 is subjected to low-pressure steam generation through the water inlet end of the evaporator 4, and the low-pressure steam generated by the evaporator 4 and secondary steam are sent into the steam ejector 3 together for manufacturing mixed steam. The residual liquid water of the evaporator 4 is delivered to the high-temperature steam generator 1 through the delivery pipe to be made into high-temperature steam, and the residual liquid water of the evaporator 4 still has higher residual temperature and is used for making the high-temperature steam, so that the consumption of energy can be reduced, and the energy utilization rate of the whole circulating system is improved.

Referring to fig. 2 and 3, the steam pipe 6 includes a plurality of jointed pipes 61 connected to each other. Both ends of each joint pipe 61 in the axial direction are provided with an insertion portion 7 and a caulking groove 8 into which the insertion portion 7 is inserted.

The embedding part 7 is cylindrical, the embedding part 7 is fixed at one end, away from the bottom of the caulking groove 8, of the sectional pipe 61, the axis of the embedding part 7 coincides with the axis of one end, away from the bottom of the caulking groove 8, of the sectional pipe 61, and the diameter of the embedding part 7 is smaller than that of the sectional pipe 61. A plurality of insert blocks 9 are fixed on the circumferential outer wall of the embedding part 7, and the insert blocks 9 are uniformly distributed in the circumferential direction around the axis of the embedding part 7.

The caulking groove 8 is a circular groove, and the axis of the caulking groove 8 is superposed with the axis of one end of the sectional tube 61 far away from the embedding part 7. The circumference inner wall of caulking groove 8 is fixed with a plurality of butt piece 10, and a plurality of butt piece 10 is circumference evenly distributed around the axis that corresponds caulking groove 8. Gaps 11 for the embedded blocks 9 to pass through are formed between every two adjacent abutting blocks 10, and the number of the gaps 11 is the same as that of the embedded blocks 9 and is even.

A sliding cavity for the sliding of the insert block 9 is formed between the end surface of the abutting block 10 facing the bottom of the insert groove 8 and the insert groove 8. A positioning block 12 is fixed on the end surface of each abutting block 10 facing the bottom of the caulking groove 8, the positioning block 12 extends towards the direction close to the bottom of the caulking groove 8, and the position of each positioning block 12 corresponding to the abutting block 10 is kept consistent.

The pre-connection of each two jointed pipes 61 is as follows: the embedding part 7 on one section pipe 61 is opposite to the embedding groove 8 on the other section pipe 61, and then a plurality of embedding blocks 9 of one section pipe 61 are aligned with a plurality of gaps 11 on the other section pipe 61 one by one, so that the plurality of embedding blocks 9 pass through the plurality of gaps 11 one by one; after the multiple embedding blocks 9 pass through the notches 11 one by one, the two segment pipes 61 are rotated around the axis, so that the embedding blocks 9 slide in the sliding cavity until the embedding blocks 9 abut against the positioning block 12, the multiple embedding blocks 9 are staggered with the multiple notches 11 one by one, the two segment pipes 61 are pre-connected at the moment, and the two ends of the embedding blocks 9 in the axis direction of the embedding part 7 abut against the bottom of the embedding groove 8 and the end faces of the abutting blocks 10 facing the embedding groove 8 respectively.

In the actual installation process, the number of the branched pipes 61 constituting the steam pipeline 6 and the connection angle between the branched pipes 61 are determined according to the position relationship between different devices and the requirements. Because every steam conduit 6 is formed by the concatenation of many segmental pipes 61, and the angle modulation between interconnect's segmental pipe 61 is comparatively convenient, consequently steam conduit 6's length and angle are easily controlled to this can increase the controllability to steam conduit 6 length and angle, the better connection demand that satisfies between each device, improves steam conduit 6's connection problem.

Each section pipe 61 is provided with a plurality of abutting screw holes 13, and the abutting screw holes 13 are circumferentially and uniformly distributed around the axis direction of the section pipe 61. Each abutting screw hole 13 penetrates through the side wall of the sectional pipe 61 and extends into the caulking groove 8, the axial direction of each abutting screw hole 13 is perpendicular to the axial direction of the caulking groove 8, and the position of each abutting screw hole 13 along the axial direction of the caulking groove 8 is located between the bottom of the caulking groove 8 and the abutting block 10.

The number of the abutting screw holes 13 on each sectional pipe 61 is the same as that of the gaps 11, the positions of the plurality of abutting screw holes 13 on each sectional pipe 61 and the positions of the plurality of gaps 11 are in one-to-one correspondence, and each abutting screw hole 13 is in threaded connection with one abutting bolt 14.

A plurality of tight grooves 15 of supporting have all been seted up to the circumference lateral wall of every embedding portion 7, and every tight groove 15 of supporting is the circular slot, and a plurality of tight grooves 15 of supporting are circumference evenly distributed around the axis direction of embedding portion 7, and every axis direction of supporting tight groove 15 all is perpendicular with the axis direction of embedding portion 7. The plurality of abutting grooves 15 on each embedding part 7 are distributed in a staggered way with the plurality of embedding blocks 9.

After the two sectional pipes 61 confirm the relative angle and complete the pre-connection, the fixed connection between the two sectional pipes 61 is completed by abutting the ends of the abutting bolts 14 against the bottoms of the abutting grooves one by one.

Referring to fig. 4 and 5, a first sealing ring groove 16 and a second sealing ring groove 17 are coaxially formed at the bottom of the caulking groove 8, and the diameter of the second sealing ring groove 17 is larger than that of the first sealing ring groove 16. A first elastic sealing ring 18 is coaxially fixed in the first sealing ring groove 16, and a second elastic sealing ring 19 is coaxially fixed in the second sealing ring groove 17. When the two sectional pipes 61 are connected, one end of the first elastic sealing ring 18 away from the bottom of the first sealing ring groove 16 abuts against the end face of the embedding part 7 facing the bottom of the embedding groove 8. One end of the second elastic sealing ring 19, which is far away from the bottom of the second sealing ring groove 17, abuts against the end surface of the insert block 9, which faces the bottom of the insert groove 8.

Referring to fig. 2 and 3, the heat insulation sleeve 20 is sleeved at the joint of every two adjacent sectional pipes 61, and the heat insulation sleeve 20 is made of rubber and plastic heat insulation materials. The heat insulating sleeve 20 is annular, two annular abutting parts 21 are coaxially fixed on an inner ring of the heat insulating sleeve 20, and the two annular abutting parts 21 are distributed at two ends of the inner ring along the axial direction of the heat insulating sleeve 20. Two annular butt grooves 22 are coaxially formed in the circumferential outer wall of each section pipe 61, and the two annular butt grooves 22 are respectively close to the embedding portion 7 and the embedding groove 8 in the corresponding section pipe 61. When the two sectional pipes 61 are connected, the two annular abutting portions 21 of the inner ring of the heat insulating jacket 20 are fitted into the annular abutting grooves 22 of the two sectional pipes 61, respectively. The outer ring of the heat insulation sleeve 20 is coaxially sleeved with two hoops 23, and the two hoops 23 are respectively located at two axial ends of the outer ring of the heat insulation sleeve 20 and used for hooping the heat insulation sleeve 20.

The working principle of the embodiment is as follows: when two segmental tubes 61 are connected, make a plurality of abaculus 9 align with a plurality of breach 11 one by one, make abaculus 9 pass through breach 11, during embedding caulking groove 8 is embedded to embedding portion 7, rotate two segmental tubes 61, make a plurality of abaculus 9 support one by one in a plurality of locating piece 12, a plurality of abaculus 9 stagger one by one with a plurality of breach 11, twist and support tight bolt 14 and make the terminal butt that supports tight bolt 14 in supporting tight groove 15, accomplish the connection of two segmental tubes 61.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides an energy-conserving papermaking system of thermal cycle, includes high-temperature steam generator (1), high temperature dryer (2), steam ejector (3) and low temperature dryer (5), connect its characterized in that through a plurality of steam conduit (6) between high-temperature steam generator (1), high temperature dryer (2), steam ejector (3) and the low temperature dryer (5): every steam conduit (6) all include many interconnect's sectional pipe (61), and per two adjacent and interconnect's sectional pipe (61) are equipped with embedding portion (7) respectively and supply caulking groove (8) of embedding portion (7) embedding, all realize connecting through the cooperation of embedding portion (7) and caulking groove (8) between per two sectional pipe (61).

2. The thermal cycle energy-saving papermaking system according to claim 1, characterized in that: the embedding part (7) is positioned at one axial end of the sectional pipe (61), the embedding part (7) is cylindrical, and a plurality of embedding blocks (9) are uniformly distributed on the circumferential outer wall of the embedding part (7); caulking groove (8) are the circular slot, caulking groove (8) are located sectional pipe (61) axial one end, the circumference lateral wall of caulking groove (8) has a plurality of butt joint piece (10) around axis evenly distributed, all is equipped with breach (11) that supply abaculus (9) to pass through between per two adjacent butt joint piece (10), and breach (11) quantity on every caulking groove (8) all is the same with abaculus (9) quantity on every embedding portion (7), and every butt joint piece (10) all form the chamber that slides that supplies abaculus (9) to pass through between the terminal surface of caulking groove (8) tank bottom and caulking groove (8) tank bottom.

3. The thermal cycle energy-saving papermaking system according to claim 2, characterized in that: the tank bottom of caulking groove (8) is coaxial to be equipped with first sealed annular (16), coaxial first elastic sealing circle (18) of being equipped with in first sealed annular (16), first elastic sealing circle (18) are used for butt embedding portion (7) towards the terminal surface that corresponds caulking groove (8).

4. The thermal cycle energy-saving papermaking system according to claim 3, wherein: the tank bottom of caulking groove (8) is coaxial to be equipped with second seal ring groove (17), the diameter of second seal ring groove (17) is greater than first seal ring groove (16), second seal ring groove (17) are coaxial to be equipped with second elastic sealing ring (19), second elastic sealing ring (19) are used for butt abaculus (9) towards the terminal surface that corresponds caulking groove (8).

5. The thermal cycle energy-saving papermaking system according to claim 2, characterized in that: the abutting bolt (14) penetrates through the sectional pipe (61), the abutting bolt (14) penetrates through the circumferential side wall of the embedded groove (8) and extends into the embedded groove (8), and the abutting bolt (14) is located between the abutting block (10) and the bottom of the embedded groove (8) along the axis direction of the embedded groove (8);

a tight-resisting groove (15) is formed in the circumferential end wall of the embedding part (7);

when the two sectional pipes (61) are connected and the embedding part (7) is embedded into the embedding groove (8), the abutting bolt (14) abuts against the abutting groove (15) to limit the relative rotation of the two sectional pipes (61).

6. The thermal cycle energy-saving papermaking system according to claim 5, wherein: a plurality of abutting bolts (14) are arranged on the sectional pipes (61), and the plurality of abutting bolts (14) on each sectional pipe (61) are uniformly distributed in the circumferential direction;

the plurality of abutting grooves (15) are formed in the circumferential end wall of the embedding part (7), and the plurality of abutting grooves (15) are uniformly distributed in the circumferential end wall of the embedding part (7) along the circumferential direction;

when the two sectional pipes (61) are connected with each other, the plurality of abutting bolts (14) abut against the plurality of abutting grooves (15) in a one-to-one correspondence manner.

7. The thermal cycle energy-saving papermaking system according to claim 2, characterized in that: each abutting block (10) is provided with a positioning block (12) for abutting against the embedded block (9) towards one end of the bottom of the corresponding embedded groove (8), and the positions of each positioning block (12) on each abutting block (10) are the same.

8. The thermal cycle energy-saving papermaking system according to claim 1, characterized in that: the connection between every two sectional pipes (61) is all overlapped and is equipped with heat insulating sleeve (20), the material of heat insulating sleeve (20) is the elasticity material.

9. The thermal cycle energy-saving papermaking system according to claim 8, wherein: the inner ring of each heat insulation sleeve (20) is provided with two annular abutting parts (21), each sectional pipe (61) is provided with an annular abutting groove (15), and the two annular abutting parts (21) on each heat insulation sleeve (20) are respectively embedded into the two annular abutting grooves (15) on the two sectional pipes (61) connected with the heat insulation sleeve;

and both ends of the axis direction of each heat insulation sleeve (20) are provided with clamping hoops (23) used for clamping the heat insulation sleeves (20).

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