CN109898335A - A kind of synthetic leather production line baking oven system and its technique using waste gas circulation - Google Patents
A kind of synthetic leather production line baking oven system and its technique using waste gas circulation Download PDFInfo
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- CN109898335A CN109898335A CN201910302456.6A CN201910302456A CN109898335A CN 109898335 A CN109898335 A CN 109898335A CN 201910302456 A CN201910302456 A CN 201910302456A CN 109898335 A CN109898335 A CN 109898335A
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- 239000002649 leather substitute Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000002912 waste gas Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 21
- 239000007789 gas Substances 0.000 claims abstract description 67
- 238000001035 drying Methods 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 18
- 238000010521 absorption reaction Methods 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 8
- 239000003960 organic solvent Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012805 post-processing Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 6
- 230000001351 cycling effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000000643 oven drying Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 206010000269 abscess Diseases 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 210000000981 epithelium Anatomy 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000000935 solvent evaporation Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
本发明的利用废气循环的合成革生产线烘箱系统由首端内循环热风系统（1）、中段内循环热风系统（2）、尾端内循环热风系统（3）、输送带（4）、烘箱内集风罩（5）、烘箱（6）、首端集风罩（7）、废气风机（8）、外循环风机（9）和尾端集风罩（10）构成。利用将本发明的烘箱系统用于合成革生产，可实现烘箱内热废气的梯级利用、冷废气的再次利用、热废气的部分循环，进而环达到节能降耗，减少后处理装置负荷的效果。
The drying oven system of the synthetic leather production line utilizing waste gas circulation of the present invention is composed of a head end internal circulating hot air system (1), a middle section internal circulating hot air system (2), a tail end internal circulating hot air system (3), a conveyor belt (4), and a drying oven. An air collecting hood (5), an oven (6), a head end air collecting hood (7), an exhaust gas fan (8), an external circulation fan (9) and a tail end air collecting hood (10) are composed. Using the oven system of the present invention for synthetic leather production can realize the cascade utilization of hot exhaust gas in the oven, the reuse of cold exhaust gas, and the partial circulation of hot exhaust gas, thereby achieving the effects of energy saving and consumption reduction, and reducing the load of the post-processing device.
Description
Technical field
The invention belongs to oven drying technical fields, and in particular to a kind of synthetic leather production line baking oven using waste gas circulation
System and its technique.
Background technique
The production technology of synthetic leather is the integrated of wet process and dry production.Synthetic leather production technology is generally made of two steps,
The first step is that bass (bottom base) is made using wet process technique in polyurethane slurry；Second step is dry method transfer veneer, that is, is adopted
With release paper method, Polyurethane Leatherette is made in the fitting of both manufactured epithelium fabric and bass.The production technology of bass be with
Non-woven fabrics or felt are substrate, are shunk into pre- consolidated slot by water, squeeze dryness finalization, then enter coating platform, solidifying
Freezing film processing is carried out in slot, in process of setting, DMF solvent is replaced by water in slurry, is formed abscess, is then continued to use water
Abscess is cleaned, last drying and processing and become bass.DMF concentration in coagulating basin aqueous solution plays emphatically product quality
The effect wanted should be controlled 20% or so, and solidification can carry out at normal temperature, and winter then can suitably heat.Dry technology for production be by
PU cold coating overlays in release paper, then carries out drying and processing, forms PU resin involucra on release paper surface by heating, so
Bass and the epithelium fitting that wet process line is produced afterwards, release paper then need to eventually become synthetic leather product by removing.
The wet process and dry process of synthetic leather production are directed to oven drying process, and baking oven used is dry for tunnel-type hot air
Baking oven, the synthetic leather for being coated with resin continuously enters one end of baking oven by conveyer belt, in oven interior through hot air circulating system
It is exported after drying from the baking oven other end, successively experienced constant rate of drying and falling-rate periods of drying process in baking oven, in final resin
Solvent volatilizees completely, and the solid matter in resin solidifies on synthetic leather, and the hot waste gas of high-enriched organics is sucked in baking oven
Go exhaust gas absorption device.The inorganization volatilization of baking oven opening organic exhaust gas can generate pollution to workshop and factory circle periphery, usually
It is provided in the opening with exhaust gas gas gathering mask, the exhaust gas collected herein is the cold exhaust gas containing low-concentration organic, is usually pumped by blower
Exhaust gas absorption device, which increase the loads of exhaust gas absorption device.Oven drying process is the main consumption of synthetic leather production process
Energy and exhaust gas generate workshop section, therefore are of great significance to the energy conservation of baking oven and reduction disordered exhaust gas discharge.
Summary of the invention
It is a kind of using waste gas circulation the technical problem to be solved by the present invention is to provide for the above-mentioned state of the art
Synthetic leather production line baking oven system and its technique, the synthetic leather that resin is coated in baking oven successively experienced constant rate of drying and drop
Fast drying process, along baking oven import to outlet, in baking oven the concentration of exhaust gas successively from high in the end, temperature be distributed from low to high,
The fresh air (cold air) of heat external sucking is primarily used to by the energy consumption known to analysis in baking oven to remain higher in baking oven
Temperature, and evaporate the less energy intensive of organic solvent, the low dense high-temp waste gas of circulating air system in reasonable Arrangement baking oven can be passed through
Cascade utilization reduces the soakage of external fresh air；The cold exhaust gas of low concentration that the gas gathering mask of baking oven opening is collected is as entrance
The fresh air of baking oven can reduce the load of subsequent exhaust gas absorption device；The hot waste gas part that baking oven is discharged is recycled, it can be into one
Step improves the concentration of final discharge exhaust gas, reduces fresh air soakage, reduces energy consumption.The present invention passes through the heat in rationally arrangement baking oven
Air circulating system, the utilization again of cold exhaust gas, the part circulation realization of hot waste gas are energy-saving, reduce after-treatment device load
Purpose.
It is a kind of synthetic leather production using waste gas circulation that the present invention, which solves technical solution used by above-mentioned technical problem,
Line baking oven system is by circulating air system in circulating air system (2) in circulating air system (1) in head end, middle section, tail end
(3), conveyer belt (4), wind-collecting cover (5), baking oven (6), head end wind-collecting cover (7), exhaust gas fan (8), outer circulation blower (9) in baking oven
It is constituted with tail end wind-collecting cover (10)；
Circulating air system (1) in head end, in middle section in circulating air system (2) and tail end circulating air system (3) composition
It is identical, it is made of interior circulating fan (A), shell-and-tube heat exchanger (B), interior circulation wind-collecting cover (C), hot air distributor (D), it is described
Shell-and-tube heat exchanger (B) tube side outside be equipped with fin, hot fluid walks tube side, cold fluid walks shell, shell side be equipped with import and
Outlet；Hot air distributor (D) main body is the cabinet (D1) of cuboid, and the two sides of the bottom of the cabinet (D1) are respectively arranged
There is 1 hot wind inlet (D3), bottom is evenly equipped with rectangle air nozzle (D2)；The interior circulation wind-collecting cover (C) passes through horizontal tube
The shell side inlet communication on road and shell-and-tube heat exchanger (B), the opening direction of the interior circulation wind-collecting cover (C) and horizontal pipeline it
Between angle be γ；The shell-side outlet of the shell-and-tube heat exchanger (B) is connected by the import of pipeline and interior circulating fan (A)
Logical, the outlet of the interior circulating fan (A) is divided into two-way, respectively even with two hot wind inlets (D3) of hot air distributor (D)
It is logical；
The both ends open of baking oven (6), conveyer belt (4) are passed through from the both ends open of baking oven (6), and are passed through in described in baking oven
The middle position of the two-way pipeline of circulating fan (A) outlet, one end of conveyer belt (4) entering to dry case (6) are head end, go out entering to dry case
(6) one end is tail end；The inside of the baking oven (6) set gradually from head end to tail end circulating air system (1) in head end,
Circulating air system (3) in circulating air system (2) and tail end in middle section, circulating air system (1) is interior in the head end
Circulation wind-collecting cover (C) is arranged close to the head end of baking oven (6), γ=90 degree；The interior circulation of circulating air system (3) in the tail end
Wind-collecting cover (C) is arranged close to the tail end of baking oven (6), γ=90 degree；The interior cycle set of circulating air system (2) in the middle section
Fan housing (C) is arranged towards tail end, γ=100 ~ 170 degree；Wind-collecting cover (5) is arranged at the top of baking oven (6) in the baking oven, opens
Mouthful downwards, and it is located at the middle position of circulating air system (2) in circulating air system (1) and middle section in head end；
It is respectively arranged with head end wind-collecting cover (7) and tail end wind-collecting cover (10) in the head end of baking oven (6) and tail end open outer side top,
Exhaust gas fan (8) and outer circulation blower (9) are provided at the top of baking oven；Wind-collecting cover (5) by pipeline and gives up in the baking oven
The inlet communication of gas blower (8), the outlet of the exhaust gas fan (8) are divided into two-way after being connected to the first threeway (101), and first
Exhaust gas absorption device is gone on road, and the second tunnel is connected to first mouth of third threeway (103)；The head end wind-collecting cover (7) and tail
End wind-collecting cover (10) passes through second be merged into after pipeline is connected to the second threeway (102) all the way with third threeway (103) respectively
A mouthful of connection, the third mouth of the third threeway (103) and the inlet communication of outer circulation blower (9), the outer circulation blower
(9) outlet is deep into oven interior in the interior circulation wind-collecting cover (C) of circulating air system (3) in caudal part by pipeline
In the heart at about 10 ~ 15 cm of side.
Technique using the system for the drying process of synthetic leather production process are as follows: the synthetic leather from coating cloth deck
Resin coating weight be 50 ~ 200 g/m, the mass content of organic solvent is 50 ~ 80% in resin, the synthetic leather after being coated with resin
Baking oven (6) are delivered into from head end with the linear velocity of 10 ~ 40 m/min by conveyer belt (4), successively the circulating air system in head end
System (1), the hot wind that the hot air distributor (D) of circulating air system (3) is discharged in circulating air system (2) and tail end in middle section are blown
It strokes, the solvent after experience constant rate of drying, falling-rate periods of drying in synthetic leather volatilizees completely, then conveys and go out from baking oven (6) tail end；Head end
The hot blast temperature control of hot air distributor (D) discharge of interior circulating air system (1) is in 110 ~ 115 DEG C, interior circulating fan (A)
Boiler pressure control is in 10000 ~ 15000 Nm3/ h, the hot wind temperature of hot air distributor (D) discharge of circulating air system (2) in middle section
Degree control is in 125 ~ 130 DEG C, the Boiler pressure control of interior circulating fan (A) in 10000 ~ 20000 Nm3/ h, circulating air system in tail end
The hot blast temperature control of hot air distributor (D) discharge of system (3) exists in the Boiler pressure control of 135 ~ 140 DEG C, interior circulating fan (A)
10000~15000 Nm3/h；The Boiler pressure control of the exhaust gas fan (8) is in 4000 ~ 12000 Nm3/ h passes through the first threeway
(101) it goes exhaust gas absorption device after and removes the allocation of the amount of air ratio of third threeway (103) to be 1 ~ 4:2；The outer circulation blower (9)
Boiler pressure control in 5000 ~ 10000 Nm3/h。
Compared with the prior art, the advantages of the present invention are as follows: 1, the low concentration cold wind feeding will baking oven both ends on the outside of aspirated
Oven interior reuses, and reduces the load of the exhaust gas absorption device of post-processing；2, it is followed in rationally being arranged by oven interior
The setting of ring hot-air system and interior circulation wind-collecting cover opening direction, it can be achieved that baking oven tail end high temperature low concentration gas to head end
Direction is mobile, and gas in baking oven is made to realize that the gradient of hot waste gas utilizes with by the countercurrent movement of dry synthetic leather；3, to discharge
The part of baking oven hot waste gas recycles, and improves the final discharge concentration of hot waste gas, (dry for given organic solvent evaporation
It is dry) amount, higher exhaust gas concentration can be reduced hot waste gas discharge rate, with preferable energy-saving effect.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of synthetic leather production line baking oven system using waste gas circulation of the invention.
Fig. 2 is the schematic diagram of interior circulating air system of the invention.
Fig. 3 is the stereoscopic schematic diagram of hot air distributor of the invention.
Specific embodiment
1, attached drawing 2 and attached drawing 3 with reference to the accompanying drawing, by embodiment, present invention is further described in detail.
Embodiment 1
Utilize circulating air system in circulating air system (1) in the synthetic leather production line baking oven system head end of waste gas circulation, middle section
Unite (2), wind-collecting cover (5) in circulating air system (3) in tail end, conveyer belt (4), baking oven, baking oven (6), head end wind-collecting cover (7),
Exhaust gas fan (8), outer circulation blower (9) and tail end wind-collecting cover (10) are constituted；Circulating air system (1) in head end is followed in middle section
Ring hot-air system (2) is identical with the composition of circulating air system (3) in tail end, by interior circulating fan (A), shell-and-tube heat exchanger
(B), the tube side outside of interior circulation wind-collecting cover (C), hot air distributor (D) composition, the shell-and-tube heat exchanger (B) is equipped with wing
Piece, hot fluid walks tube side, cold fluid walks shell, and shell side is equipped with inlet and outlet；Hot air distributor (D) main body is rectangular
The cabinet (D1) of body, the two sides of the bottom of the cabinet (D1) are each provided with 1 hot wind inlet (D3), and bottom is evenly equipped with rectangle
Air nozzle (D2)；The interior circulation wind-collecting cover (C) passes through the shell side inlet communication of horizontal pipeline and shell-and-tube heat exchanger (B),
Angle between the opening direction and horizontal pipeline of the interior circulation wind-collecting cover (C) is γ；The shell-and-tube heat exchanger (B)
Shell-side outlet by the inlet communication of pipeline and interior circulating fan (A), the outlet of the interior circulating fan (A) is divided into two
Road is connected to two hot wind inlets (D3) of hot air distributor (D) respectively；The both ends open of baking oven (6), conveyer belt (4) is from baking
The both ends open of case (6) passes through, and the interposition for the two-way pipeline that the interior circulating fan (A) exports is passed through in baking oven
It sets, one end of conveyer belt (4) entering to dry case (6) is head end, the one end of entering to dry case (6) is tail end out；The inside of the baking oven (6)
Circulating air system (1) in head end is set gradually from head end to tail end, cycling hot in circulating air system (2) and tail end in middle section
Wind system (3), the interior circulation wind-collecting cover (C) of circulating air system (1) is arranged close to the head end of baking oven (6) in the head end,
γ=90 degree；The interior circulation wind-collecting cover (C) of circulating air system (3) is arranged close to the tail end of baking oven (6), γ=90 in the tail end
Degree；The interior circulation wind-collecting cover (C) of circulating air system (2) is arranged towards tail end, γ=170 degree in the middle section；The baking
Wind-collecting cover (5) is arranged at the top of baking oven (6) in case, and Open Side Down, and is located in head end in circulating air system (1) and middle section
The middle position of circulating air system (2)；Head end collection wind is respectively arranged in the head end of baking oven (6) and tail end open outer side top
(7) and tail end wind-collecting cover (10) are covered, exhaust gas fan (8) and outer circulation blower (9) are provided at the top of baking oven；In the baking oven
Wind-collecting cover (5) passes through the inlet communication of pipeline and exhaust gas fan (8), the outlet and the first threeway (101) of the exhaust gas fan (8)
Two-way is divided into after connection, the first via goes exhaust gas absorption device, and the second tunnel is connected to first mouth of third threeway (103)；Institute
The head end wind-collecting cover (7) and tail end wind-collecting cover (10) stated are merged into all the way after being connected to respectively by pipeline with the second threeway (102)
Be connected to second mouth of third threeway (103), the third mouth of the third threeway (103) and outer circulation blower (9) into
The outlet of mouth connection, the outer circulation blower (9) is deep into oven interior by circulating air system (3) in caudal part by pipeline
Interior circulation wind-collecting cover (C) about 10 cm of overcentre at.
Technique using above system for the drying process of synthetic leather production process: the tree of the synthetic leather from coating cloth deck
Rouge coating weight is 50 g/m, and the mass content of solvent is 50% in resin, and the synthetic leather after being coated with resin is by conveyer belt (4) with 10
The linear velocity of m/min delivers into baking oven (6) from head end, successively circulating air system (1), circulating air in middle section in head end
The hot wind of hot air distributor (D) discharge of circulating air system (3) brushes in system (2) and tail end, undergoes constant rate of drying, reduction of speed
Solvent after drying in synthetic leather volatilizees completely, then conveys and go out from baking oven (6) tail end；Circulating air system (1) in head end
The hot blast temperature control of hot air distributor (D) discharge is in 110 DEG C, the Boiler pressure control of interior circulating fan (A) in 10000 Nm3/ h,
The hot blast temperature control of hot air distributor (D) discharge of circulating air system (2) is in 130 DEG C, interior circulating fan (A) in middle section
Boiler pressure control is in 20000 Nm3/ h, the hot blast temperature control of hot air distributor (D) discharge of circulating air system (3) in tail end
In 135 DEG C, the Boiler pressure control of interior circulating fan (A) in 15000 Nm3/h；The Boiler pressure control of the exhaust gas fan (8) exists
4000Nm3/ h, by going exhaust gas absorption device after the first threeway (101) and removing the allocation of the amount of air ratio of third threeway (103) to be 4:
2；The Boiler pressure control of the outer circulation blower (9) is in 5000 Nm3/h。
The present embodiment uses steam-heating pipe shell heat exchanger, consumes 0.5 ton of steam of 1.0 MPa per hour；Power consumption function
Rate is 25 kW.
Embodiment 2
Utilize circulating air system in circulating air system (1) in the synthetic leather production line baking oven system head end of waste gas circulation, middle section
Unite (2), wind-collecting cover (5) in circulating air system (3) in tail end, conveyer belt (4), baking oven, baking oven (6), head end wind-collecting cover (7),
Exhaust gas fan (8), outer circulation blower (9) and tail end wind-collecting cover (10) are constituted；Circulating air system (1) in head end is followed in middle section
Ring hot-air system (2) is identical with the composition of circulating air system (3) in tail end, by interior circulating fan (A), shell-and-tube heat exchanger
(B), the tube side outside of interior circulation wind-collecting cover (C), hot air distributor (D) composition, the shell-and-tube heat exchanger (B) is equipped with wing
Piece, hot fluid walks tube side, cold fluid walks shell, and shell side is equipped with inlet and outlet；Hot air distributor (D) main body is rectangular
The cabinet (D1) of body, the two sides of the bottom of the cabinet (D1) are each provided with 1 hot wind inlet (D3), and bottom is evenly equipped with rectangle
Air nozzle (D2)；The interior circulation wind-collecting cover (C) passes through the shell side inlet communication of horizontal pipeline and shell-and-tube heat exchanger (B),
Angle between the opening direction and horizontal pipeline of the interior circulation wind-collecting cover (C) is γ；The shell-and-tube heat exchanger (B)
Shell-side outlet by the inlet communication of pipeline and interior circulating fan (A), the outlet of the interior circulating fan (A) is divided into two
Road is connected to two hot wind inlets (D3) of hot air distributor (D) respectively；The both ends open of baking oven (6), conveyer belt (4) is from baking
The both ends open of case (6) passes through, and the interposition for the two-way pipeline that the interior circulating fan (A) exports is passed through in baking oven
It sets, one end of conveyer belt (4) entering to dry case (6) is head end, the one end of entering to dry case (6) is tail end out；The inside of the baking oven (6)
Circulating air system (1) in head end is set gradually from head end to tail end, cycling hot in circulating air system (2) and tail end in middle section
Wind system (3), the interior circulation wind-collecting cover (C) of circulating air system (1) is arranged close to the head end of baking oven (6) in the head end,
γ=90 degree；The interior circulation wind-collecting cover (C) of circulating air system (3) is arranged close to the tail end of baking oven (6), γ=90 in the tail end
Degree；The interior circulation wind-collecting cover (C) of circulating air system (2) is arranged towards tail end, γ=100 degree in the middle section；The baking
Wind-collecting cover (5) is arranged at the top of baking oven (6) in case, and Open Side Down, and is located in head end in circulating air system (1) and middle section
The middle position of circulating air system (2)；Head end collection wind is respectively arranged in the head end of baking oven (6) and tail end open outer side top
(7) and tail end wind-collecting cover (10) are covered, exhaust gas fan (8) and outer circulation blower (9) are provided at the top of baking oven；In the baking oven
Wind-collecting cover (5) passes through the inlet communication of pipeline and exhaust gas fan (8), the outlet and the first threeway (101) of the exhaust gas fan (8)
Two-way is divided into after connection, the first via goes exhaust gas absorption device, and the second tunnel is connected to first mouth of third threeway (103)；Institute
The head end wind-collecting cover (7) and tail end wind-collecting cover (10) stated are merged into all the way after being connected to respectively by pipeline with the second threeway (102)
Be connected to second mouth of third threeway (103), the third mouth of the third threeway (103) and outer circulation blower (9) into
The outlet of mouth connection, the outer circulation blower (9) is deep into oven interior by circulating air system (3) in caudal part by pipeline
Interior circulation wind-collecting cover (C) about 15 cm of overcentre at.
Technique using above system for the drying process of synthetic leather production process: the tree of the synthetic leather from coating cloth deck
Rouge coating weight is 150 g/m, and the mass content of solvent is 70% in resin, and the synthetic leather after being coated with resin is by conveyer belt (4) with 40
The linear velocity of m/min delivers into baking oven (6) from head end, successively circulating air system (1), circulating air in middle section in head end
The hot wind of hot air distributor (D) discharge of circulating air system (3) brushes in system (2) and tail end, undergoes constant rate of drying, reduction of speed
Solvent after drying in synthetic leather volatilizees completely, then conveys and go out from baking oven (6) tail end；Circulating air system (1) in head end
The hot blast temperature control of hot air distributor (D) discharge is in 115 DEG C, the Boiler pressure control of interior circulating fan (A) in 15000 Nm3/ h,
The hot blast temperature control of hot air distributor (D) discharge of circulating air system (2) is in 125 DEG C, interior circulating fan (A) in middle section
Boiler pressure control is in 15000 Nm3/ h, the hot blast temperature control of hot air distributor (D) discharge of circulating air system (3) in tail end
In 140 DEG C, the Boiler pressure control of interior circulating fan (A) in 10000 Nm3/h；The Boiler pressure control of the exhaust gas fan (8) exists
12000 Nm3/ h, by going exhaust gas absorption device to be with the allocation of the amount of air ratio of third threeway (103) is removed after the first threeway (101)
1:2；The Boiler pressure control of the outer circulation blower (9) is in 10000 Nm3/h。
The present embodiment uses steam-heating pipe shell heat exchanger, consumes 0.8 ton of steam of 1.0 MPa per hour；Power consumption function
Rate is 30 kW.
Embodiment 3
Utilize circulating air system in circulating air system (1) in the synthetic leather production line baking oven system head end of waste gas circulation, middle section
Unite (2), wind-collecting cover (5) in circulating air system (3) in tail end, conveyer belt (4), baking oven, baking oven (6), head end wind-collecting cover (7),
Exhaust gas fan (8), outer circulation blower (9) and tail end wind-collecting cover (10) are constituted；Circulating air system (1) in head end is followed in middle section
Ring hot-air system (2) is identical with the composition of circulating air system (3) in tail end, by interior circulating fan (A), shell-and-tube heat exchanger
(B), the tube side outside of interior circulation wind-collecting cover (C), hot air distributor (D) composition, the shell-and-tube heat exchanger (B) is equipped with wing
Piece, hot fluid walks tube side, cold fluid walks shell, and shell side is equipped with inlet and outlet；Hot air distributor (D) main body is rectangular
The cabinet (D1) of body, the two sides of the bottom of the cabinet (D1) are each provided with 1 hot wind inlet (D3), and bottom is evenly equipped with rectangle
Air nozzle (D2)；The interior circulation wind-collecting cover (C) passes through the shell side inlet communication of horizontal pipeline and shell-and-tube heat exchanger (B),
Angle between the opening direction and horizontal pipeline of the interior circulation wind-collecting cover (C) is γ；The shell-and-tube heat exchanger (B)
Shell-side outlet by the inlet communication of pipeline and interior circulating fan (A), the outlet of the interior circulating fan (A) is divided into two
Road is connected to two hot wind inlets (D3) of hot air distributor (D) respectively；The both ends open of baking oven (6), conveyer belt (4) is from baking
The both ends open of case (6) passes through, and the interposition for the two-way pipeline that the interior circulating fan (A) exports is passed through in baking oven
It sets, one end of conveyer belt (4) entering to dry case (6) is head end, the one end of entering to dry case (6) is tail end out；The inside of the baking oven (6)
Circulating air system (1) in head end is set gradually from head end to tail end, cycling hot in circulating air system (2) and tail end in middle section
Wind system (3), the interior circulation wind-collecting cover (C) of circulating air system (1) is arranged close to the head end of baking oven (6) in the head end,
γ=90 degree；The interior circulation wind-collecting cover (C) of circulating air system (3) is arranged close to the tail end of baking oven (6), γ=90 in the tail end
Degree；The interior circulation wind-collecting cover (C) of circulating air system (2) is arranged towards tail end, γ=135 degree in the middle section；The baking
Wind-collecting cover (5) is arranged at the top of baking oven (6) in case, and Open Side Down, and is located in head end in circulating air system (1) and middle section
The middle position of circulating air system (2)；Head end collection wind is respectively arranged in the head end of baking oven (6) and tail end open outer side top
(7) and tail end wind-collecting cover (10) are covered, exhaust gas fan (8) and outer circulation blower (9) are provided at the top of baking oven；In the baking oven
Wind-collecting cover (5) passes through the inlet communication of pipeline and exhaust gas fan (8), the outlet and the first threeway (101) of the exhaust gas fan (8)
Two-way is divided into after connection, the first via goes exhaust gas absorption device, and the second tunnel is connected to first mouth of third threeway (103)；Institute
The head end wind-collecting cover (7) and tail end wind-collecting cover (10) stated are merged into all the way after being connected to respectively by pipeline with the second threeway (102)
Be connected to second mouth of third threeway (103), the third mouth of the third threeway (103) and outer circulation blower (9) into
The outlet of mouth connection, the outer circulation blower (9) is deep into oven interior by circulating air system (3) in caudal part by pipeline
Interior circulation wind-collecting cover (C) about 12 cm of overcentre at.
Technique using above system for the drying process of synthetic leather production process: the tree of the synthetic leather from coating cloth deck
Rouge coating weight is 150g/m, and the mass content of solvent is 80% in resin, and the synthetic leather after being coated with resin is by conveyer belt (4) with 20
The linear velocity of m/min delivers into baking oven (6) from head end, successively circulating air system (1), circulating air in middle section in head end
The hot wind of hot air distributor (D) discharge of circulating air system (3) brushes in system (2) and tail end, undergoes constant rate of drying, reduction of speed
Solvent after drying in synthetic leather volatilizees completely, then conveys and go out from baking oven (6) tail end；Circulating air system (1) in head end
The hot blast temperature control of hot air distributor (D) discharge is in 113 DEG C, the Boiler pressure control of interior circulating fan (A) in 10000 Nm3/ h,
The hot blast temperature control of hot air distributor (D) discharge of circulating air system (2) is in 130 DEG C, interior circulating fan (A) in middle section
Boiler pressure control is in 10000 Nm3/ h, the hot blast temperature control of hot air distributor (D) discharge of circulating air system (3) in tail end
In 140 DEG C, the Boiler pressure control of interior circulating fan (A) in 12000 Nm3/h；The Boiler pressure control of the exhaust gas fan (8) exists
8000 Nm3/ h, by going exhaust gas absorption device after the first threeway (101) and removing the allocation of the amount of air ratio of third threeway (103) to be 3:
2；The Boiler pressure control of the outer circulation blower (9) is in 5000 Nm3/h。
The present embodiment uses steam-heating pipe shell heat exchanger, consumes 0.98 ton of steam of 1.0 MPa per hour；Power consumption function
Rate is 22 kW.
Embodiment 4
Utilize circulating air system in circulating air system (1) in the synthetic leather production line baking oven system head end of waste gas circulation, middle section
Unite (2), wind-collecting cover (5) in circulating air system (3) in tail end, conveyer belt (4), baking oven, baking oven (6), head end wind-collecting cover (7),
Exhaust gas fan (8), outer circulation blower (9) and tail end wind-collecting cover (10) are constituted；Circulating air system (1) in head end is followed in middle section
Ring hot-air system (2) is identical with the composition of circulating air system (3) in tail end, by interior circulating fan (A), shell-and-tube heat exchanger
(B), the tube side outside of interior circulation wind-collecting cover (C), hot air distributor (D) composition, the shell-and-tube heat exchanger (B) is equipped with wing
Piece, hot fluid walks tube side, cold fluid walks shell, and shell side is equipped with inlet and outlet；Hot air distributor (D) main body is rectangular
The cabinet (D1) of body, the two sides of the bottom of the cabinet (D1) are each provided with 1 hot wind inlet (D3), and bottom is evenly equipped with rectangle
Air nozzle (D2)；The interior circulation wind-collecting cover (C) passes through the shell side inlet communication of horizontal pipeline and shell-and-tube heat exchanger (B),
Angle between the opening direction and horizontal pipeline of the interior circulation wind-collecting cover (C) is γ；The shell-and-tube heat exchanger (B)
Shell-side outlet by the inlet communication of pipeline and interior circulating fan (A), the outlet of the interior circulating fan (A) is divided into two
Road is connected to two hot wind inlets (D3) of hot air distributor (D) respectively；The both ends open of baking oven (6), conveyer belt (4) is from baking
The both ends open of case (6) passes through, and the interposition for the two-way pipeline that the interior circulating fan (A) exports is passed through in baking oven
It sets, one end of conveyer belt (4) entering to dry case (6) is head end, the one end of entering to dry case (6) is tail end out；The inside of the baking oven (6)
Circulating air system (1) in head end is set gradually from head end to tail end, cycling hot in circulating air system (2) and tail end in middle section
Wind system (3), the interior circulation wind-collecting cover (C) of circulating air system (1) is arranged close to the head end of baking oven (6) in the head end,
γ=90 degree；The interior circulation wind-collecting cover (C) of circulating air system (3) is arranged close to the tail end of baking oven (6), γ=90 in the tail end
Degree；The interior circulation wind-collecting cover (C) of circulating air system (2) is arranged towards tail end, γ=120 degree in the middle section；The baking
Wind-collecting cover (5) is arranged at the top of baking oven (6) in case, and Open Side Down, and is located in head end in circulating air system (1) and middle section
The middle position of circulating air system (2)；Head end collection wind is respectively arranged in the head end of baking oven (6) and tail end open outer side top
(7) and tail end wind-collecting cover (10) are covered, exhaust gas fan (8) and outer circulation blower (9) are provided at the top of baking oven；In the baking oven
Wind-collecting cover (5) passes through the inlet communication of pipeline and exhaust gas fan (8), the outlet and the first threeway (101) of the exhaust gas fan (8)
Two-way is divided into after connection, the first via goes exhaust gas absorption device, and the second tunnel is connected to first mouth of third threeway (103)；Institute
The head end wind-collecting cover (7) and tail end wind-collecting cover (10) stated are merged into all the way after being connected to respectively by pipeline with the second threeway (102)
Be connected to second mouth of third threeway (103), the third mouth of the third threeway (103) and outer circulation blower (9) into
The outlet of mouth connection, the outer circulation blower (9) is deep into oven interior by circulating air system (3) in caudal part by pipeline
Interior circulation wind-collecting cover (C) overcentre about 14cm at.
Technique using above system for the drying process of synthetic leather production process: the tree of the synthetic leather from coating cloth deck
Rouge coating weight is 200 g/m, and the mass content of solvent is 80% in resin, and the synthetic leather after being coated with resin is by conveyer belt (4) with 30
The linear velocity of m/min delivers into baking oven (6) from head end, successively circulating air system (1), circulating air in middle section in head end
The hot wind of hot air distributor (D) discharge of circulating air system (3) brushes in system (2) and tail end, undergoes constant rate of drying, reduction of speed
Solvent after drying in synthetic leather volatilizees completely, then conveys and go out from baking oven (6) tail end；Circulating air system (1) in head end
The hot blast temperature control of hot air distributor (D) discharge is in 110 DEG C, the Boiler pressure control of interior circulating fan (A) in 13000 Nm3/ h,
The hot blast temperature control of hot air distributor (D) discharge of circulating air system (2) is in 125 DEG C, interior circulating fan (A) in middle section
Boiler pressure control is in 15000 Nm3/ h, the hot blast temperature control of hot air distributor (D) discharge of circulating air system (3) in tail end
In 135 DEG C, the Boiler pressure control of interior circulating fan (A) in 15000 Nm3/h；The Boiler pressure control of the exhaust gas fan (8) exists
10000 Nm3/ h, by going exhaust gas absorption device to be with the allocation of the amount of air ratio of third threeway (103) is removed after the first threeway (101)
3:2；The Boiler pressure control of the outer circulation blower (9) is in 10000 Nm3/h。
The present embodiment uses steam-heating pipe shell heat exchanger, consumes 1.2 tons of steam of 1.0 MPa per hour；Power consumption function
Rate is 33 kW.
Comparative example 1
The first threeway (101), third threeway (103) and pipeline between the two in embodiment 1 is cancelled, baking oven system changes
Become part and directly remove waste gas collection device into the outlet of exhaust gas fan (8), from head end end wind-collecting cover (7) and tail end wind-collecting cover (10)
The fresh air of collection directly removes the air inlet of circulating fan (9) after the second threeway (102).Remaining is consistent with embodiment 1, final
As a result become 1.2 tons of steam that consume 1.0 MPa per hour；Power consumption power is 32 kW.
Comparative example 2
The interior circulation wind-collecting cover (C) of circulating air system (1) in head end in embodiment 4 is arranged close to the head end of baking oven (6),
γ=180 degree；The interior circulation wind-collecting cover (C) of circulating air system (3) is arranged close to the tail end of baking oven (6) in the tail end, and γ=
180 degree；The interior circulation wind-collecting cover (C) of circulating air system (2) is arranged towards tail end, γ=90 degree in the middle section.Remaining with
Embodiment 4 is consistent, and final result becomes the present embodiment using steam-heating pipe shell heat exchanger, consumes 1.0 MPa per hour
1.5 tons of steam；Power consumption power is 40 kW.
The above list is only a few specific embodiments of the present invention for finally, it should also be noted that.Obviously, this hair
Bright to be not limited to above embodiments, acceptable there are many deformations.Those skilled in the art can be from present disclosure
All deformations for directly exporting or associating, are considered as protection scope of the present invention.
Claims (2)
1. a kind of synthetic leather production line baking oven system using waste gas circulation, it is characterised in that: the system in head end by following
Circulating air system (2) in ring hot-air system (1), middle section, circulating air system (3) in tail end, conveyer belt (4), collection in baking oven
Fan housing (5), baking oven (6), head end wind-collecting cover (7), exhaust gas fan (8), outer circulation blower (9) and tail end wind-collecting cover (10) are constituted；
Circulating air system (1) in the head end, circulating air system (3) in circulating air system (2) and tail end in middle section
Composition it is identical, by interior circulating fan (A), shell-and-tube heat exchanger (B), interior circulation wind-collecting cover (C), hot air distributor (D) group
At equipped with fin outside the tube side of the shell-and-tube heat exchanger (B), hot fluid walks tube side, cold fluid walks shell, and shell side is equipped with
Inlet and outlet；Hot air distributor (D) main body is the cabinet (D1) of cuboid, the two sides of the bottom of the cabinet (D1)
It is each provided with 1 hot wind inlet (D3), bottom is evenly equipped with rectangle air nozzle (D2)；The interior circulation wind-collecting cover (C) passes through
The shell side inlet communication of horizontal pipeline and shell-and-tube heat exchanger (B), the opening direction and level of the interior circulation wind-collecting cover (C)
Angle between pipeline is γ；The shell-side outlet of the shell-and-tube heat exchanger (B) by pipeline and interior circulating fan (A) into
Mouthful connection, the outlet of the interior circulating fan (A) is divided into two-way, respectively with two hot wind inlets of hot air distributor (D)
(D3) it is connected to；
The both ends open of the baking oven (6), conveyer belt (4) are passed through from the both ends open of baking oven (6), and institute is passed through in baking oven
The middle position of the two-way pipeline for interior circulating fan (A) outlet stated, one end of conveyer belt (4) entering to dry case (6) be head end, go out into
One end of baking oven (6) is tail end；The inside of the baking oven (6) sets gradually circulating air system in head end from head end to tail end
(1), circulating air system (3) in circulating air system (2) and tail end in middle section, circulating air system (1) in the head end
Interior circulation wind-collecting cover (C) be arranged close to the head ends of baking oven (6), γ=90 degree；Circulating air system (3) is interior in the tail end
Circulation wind-collecting cover (C) is arranged close to the tail end of baking oven (6), γ=90 degree；The interior of circulating air system (2) follows in the middle section
Ring wind-collecting cover (C) is arranged towards tail end, γ=100 ~ 170 degree；Top of wind-collecting cover (5) setting in baking oven (6) in the baking oven
Portion, Open Side Down, and is located at the middle position of circulating air system (2) in circulating air system (1) and middle section in head end；
It is respectively arranged with head end wind-collecting cover (7) and tail end wind-collecting cover (10) in the head end of baking oven (6) and tail end open outer side top,
Exhaust gas fan (8) and outer circulation blower (9) are provided at the top of baking oven；Wind-collecting cover (5) by pipeline and gives up in the baking oven
The inlet communication of gas blower (8), the outlet of the exhaust gas fan (8) are divided into two-way after being connected to the first threeway (101), and first
Exhaust gas absorption device is gone on road, and the second tunnel is connected to first mouth of third threeway (103)；The head end wind-collecting cover (7) and tail
End wind-collecting cover (10) passes through second be merged into after pipeline is connected to the second threeway (102) all the way with third threeway (103) respectively
A mouthful of connection, the third mouth of the third threeway (103) and the inlet communication of outer circulation blower (9), the outer circulation blower
(9) outlet is deep into oven interior in the interior circulation wind-collecting cover (C) of circulating air system (3) in caudal part by pipeline
In the heart at about 10 ~ 15 cm of side.
2. the technique using system described in claim 1 for the drying process of synthetic leather production process, it is characterised in that: come
Resin coating weight from the synthetic leather of coating cloth deck is 50 ~ 200 g/m, and the mass content of organic solvent is 50 ~ 80% in resin, is applied
Synthetic leather after cloth resin delivers into baking oven (6) from head end with the linear velocity of 10 ~ 40 m/min by conveyer belt (4), successively passes through
Circulating air system (1) in head end, in middle section in circulating air system (2) and tail end circulating air system (3) hot wind distribution
The hot wind of device (D) discharge brushes, and experience constant rate of drying, the solvent after falling-rate periods of drying in synthetic leather volatilize completely, then from baking oven (6)
Tail end conveys and goes out；The hot blast temperature of hot air distributor (D) discharge of circulating air system (1) is controlled 110 ~ 115 in head end
DEG C, the Boiler pressure control of interior circulating fan (A) is in 10000 ~ 15000 Nm3/ h, the hot wind distribution of circulating air system (2) in middle section
The hot blast temperature control of device (D) discharge is in 125 ~ 130 DEG C, the Boiler pressure control of interior circulating fan (A) in 10000 ~ 20000 Nm3/
H, the hot blast temperature of hot air distributor (D) discharge of circulating air system (3) is controlled in 135 ~ 140 DEG C, interior circulated air in tail end
The Boiler pressure control of machine (A) is in 10000 ~ 15000 Nm3/h；The Boiler pressure control of the exhaust gas fan (8) is 4000 ~ 12000
Nm3/ h, by going exhaust gas absorption device after the first threeway (101) and removing the allocation of the amount of air ratio of third threeway (103) to be 1 ~ 4:2；
The Boiler pressure control of the outer circulation blower (9) is in 5000 ~ 10000 Nm3/h。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114808330A (en) * | 2022-06-07 | 2022-07-29 | 河北清山绿水节能科技有限公司 | Energy-efficient forming machine |
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