CN101648181A - Integral overlapping drying equipment - Google Patents
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- CN101648181A CN101648181A CN 200910192211 CN200910192211A CN101648181A CN 101648181 A CN101648181 A CN 101648181A CN 200910192211 CN200910192211 CN 200910192211 CN 200910192211 A CN200910192211 A CN 200910192211A CN 101648181 A CN101648181 A CN 101648181A
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Abstract
The invention relates to integral overlapping drying equipment which is characterized by comprising a box body (10), a blowing unit (60) and a hot pump device (80), wherein the box body (10) comprisesa drying box cover (20) and a base (50); the drying box cover (20) is internally provided with drying cavities (13) and recovering cavities (14) which are mutually connected end to end and; the blowing unit (60) comprises a blower (30) and is internally provided with a wind inlet passage (63), a wind discharge passage (64) and a wind outlet passage (68); the hot pump device (80) comprises a hot pump compressor (89), a hot pump throttle valve (87), an evaporation condenser (85), a hot pump condenser (88), a refrigeration compressor (99), a refrigeration evaporator (96) and a refrigeration throttle valve (97) to form a hot pump system and a refrigeration system; and the hot pump system and the refrigeration system are overlapped by the evaporation condenser (85) to form the hot pump devicetogether. The integral overlapping drying equipment is widely suitable for processing equipment for drying thin strip-shaped objects continuously traveling and has the advantages of simplified structure, small volume, zero waste gas discharge and energy consumption reduction.
Description
Technical field
The present invention relates to integral overlapping drying equipment, be applicable to the thin strip-shaped object (hereinafter to be referred as printing) that oven dry is advanced continuously, be widely used in similar process equipments such as coating machine, compounding machine, printing machine, roller coating line, gluing machine, also can be used for drying the article of continuous transmission.Belong to drying plant technical fields such as printing, coating.
Background technology
At present, be used for the thin strip-shaped object process equipment and generally all have following feature: printing is the thin strip-shaped object of advancing continuously, as plastic sheeting, metal sheet etc., generally adopts unwinding and rewinding mechanism to realize advancing continuously, and processing continuously in the process of advancing.Institute's product processed or product substrate surface utilize the transfer device of equipment to cover one or more layers material earlier, as printing ink, coating, glue etc., and these materials need add solvent, water or other liquid for the purpose of dissolving, dilution, dispersion before transferring to product surface, shift to cover finish after, the baking oven that institute's converted products must be by equipment with hot blast with liquid component be evaporated to steam zone from.
Desirable drying plant must can be taken into account dries quantity and drying rate simultaneously, avoids environment is polluted, and cuts down the consumption of energy as much as possible, reduces the operating cost of process equipment.
Drying rate depends on evaporation rate, and the principal element that influences the liquid evaporation rate is the vapor partial pressure of temperature and liquid surface.When temperature reaches the boiling point of liquid, liquid will seethe with excitement and become steam apace.The liquid evaporation needs to absorb heat, and in time additional heat will cause evaporation rate to reduce.Because temperature also influences the saturated concentration of steam, the high more vapor partial pressure of saturated concentration is low more, and then evaporation rate is just fast more.So hot-air seasoning is the most frequently used drying mode, when hot blast brushes liquid surface, promptly diluted the steam of liquid surface, reduced vapor partial pressure, transmit heat again and given liquid, accelerated evaporation rate.For obtaining drying rate faster, the mode of taking to improve bake out temperature usually and strengthening the oven dry air quantity.But the big air quantity of high-temperature causes high thermal energy consumption, and is unfavorable for improving dries quantity.
Dries quantity is mainly observed the residual volume of liquid and the influence of drying course printing product surface impression.Be printed as example with plastics packed solvent ink, allow solvent residual amount extremely low, the obscission of bubbling must not appear in the surface.If beginning is just with the big air quantity oven dry of high temperature, the evaporation rate of solvent on printing ink top layer is moved to the speed on top layer greater than the internal layer solvent, top layer printing ink will be condensed into fine and close film by oven dry rapidly, stop the evaporation of internal layer solvent, it is the surface drying phenomenon, consequence or be that dissolvent residual causes the ink adhesion deficiency occurs coming off when serious, or is that solvent forms bubble or breaks through the top layer in the internal layer evaporation and pore occurs.If bake out temperature is low or air quantity is little, then drying rate is slow, and print speed printing speed must slow down, and necessarily has residual without the thorough dry out solvent of high temperature.So single bake out temperature can't be taken into account speed and quality, have only by the characteristic in each stage of oven dry and come regulating and controlling temperature and air quantity, just can take into account speed, quality, the energy consumption of oven dry.
Avoid environment is polluted, then should adopt the circulation mode of production to reduce or eliminate the generation of waste gas waste water.Energy-conservation energy resource consumption mode and the grade that then needs planning and designing equipment, comprehensive advanced person's the power-saving technology that adopts realizes.
According to prior art, oven dry amount small device such as printing machine adopt the monomer baking oven, because the baking oven size restrictions generally can only adopt single bake out temperature; The equipment that oven dry such as coating machine, compounding machine amount is bigger, the baking oven size restrictions is less, generally adopts many baking ovens unit combination, and there are independently air intake/outtake system and temperature control in each unit, can come regulating and controlling temperature and air quantity by the characteristic in each stage of oven dry roughly.
As shown in Figure 12 and Figure 13, existing printing machine drying plant is made up of baking oven 10, hot air apparatus 40, connection airduct, exhaust system.Baking oven comprises oven cover 20, base 50, is provided with printing inlet 03, printing outlet 04;
During work, printing 00 enters baking oven through printing inlet 03, advances under backing roll 52 rolls support, dries after printing outlet 04 is left.Fresh air enters air intake passage 63 by new wind inlet 01, inlet air door 66 can be adjusted intake, enter 48 heating of air heater via and blower fan 30 pressurizations and back of air intake passage 63 by air-out passage 68, air taking port 46, air inlet 43 enters the inlet chamber 11 in the oven cover 20, purge the surface of the printing 00 of advancing continuously through nozzle 34 ejections, force liquid to be evaporated to steam and mix formation waste gas in back with air, waste gas enters discharge chamber 12 through air intake duct 42, again through exhaust outlet 44, return-air mouth 45 is got back to hot air apparatus, part is discharged into the atmosphere from waste gas outlet 02 through air exhaust passage 64, part is through return air channel 69, return air air door 67 mixes with the fresh air of air intake passage 63, heater via 48 heating and blower fan 30 pressurizations and back are by air-out passage 68 again, air taking port 46, air inlet 43 enters the inlet chamber 11 in the oven cover 20, thereby reduce the amount of fresh air that enters, reduce the energy consumption that adds hot-air.Adjusting inlet air door 66 and return air air door 67 can change the flow and the mutual ratio of air intake, return air.
Above-mentioned existing drying plant complex structure, owing to will obtain higher jet velocity, blower fan 30 all adopts centrifugal high pressure fan usually, cause inlet chamber to bear bigger pressure, need to adopt thicker steel plate to make, and then cause bulky, and the gas flow purging stroke is short, throughput is little, and drying efficiency is low, and then the lifting of the restriction equipment speed of service.Because gas can only adopt single bake out temperature with advancing with going out, and can't satisfy meticulous stoving process requirement, it is not saturating to select low bake out temperature then to dry, and select high bake out temperature then to occur the surface drying phenomenon easily, and energy consumption is huge.
Improvement project as above-mentioned drying plant oven dry performance and energy-conservation aspect, China utility model patent CN201214303Y discloses a kind of full-automatic circulation drier, comprise in the new wind air inlet and be provided with balance air door, new wind air inlet is by a three-way pipe, mixing bellows is communicated with heater, the outlet of heater is provided with the one-level blower fan, the one-level blower and pipeline is communicated with the baking oven of a side, the outlet of baking oven is communicated with the secondary blower fan by pipeline, the secondary blower and pipeline is communicated with the secondary baking oven, the outlet of baking oven is communicated with another three-way pipe by pipeline, this three-way pipe is communicated with the waste gas exhaust outlet, be provided with the waste discharge self closing door in the waste gas exhaust outlet, three-way pipe also takes back new wind air inlet by the pipeline that is provided with the circulation self closing door; Outlet at a back baking oven is provided with the LEL detector.The utility model can be realized energy-conservation in online detection, safety, environmental protection requirement; Be that heat energy has obtained effective utilization, saved the energy, improved the quality of printing effectively, waste discharge meets environmental protection requirement.
This utility model promote the oven dry performance, energy-conservation and secure context has progress, but device structure complexity, bulky, and only be divided into the two-stage oven dry can not satisfy the requirement of most stoving processes.Though can reduce waste heat discharge, there is no improvement aspect the minimizing solvent pollution from exhaust emission.
A kind of improvement project as above-mentioned drying plant environmental protection aspect, use active carbon or activated carbon fiber that exhaust gas discharged is carried out adsorption treatment, most organic solvent in the waste gas can be reclaimed, reduce atmosphere pollution to a certain extent, and had certain economic benefits.But also there is following problem in this improvement project: 1, for the control device cost need reduce exhaust gas flow, cause hidden peril of explosion more outstanding; 2, in waste gas treatment process, also want the huge energy of additive decrementation, operating cost is higher; 3, active carbon or activated carbon fiber are consumptive material, need periodic replacement, cause cost to rise and influence production; 4, the desorption processing procedure can produce the water pollution; Equipment complexity, bulky takies the production site of more preciousness, and makes improvement project be subjected to more restriction; 5, be helpless to promote product quality and avoid production process affected by environment.
Relevant textbook and pertinent literature propose to adopt in drying plant condensation to reclaim the scheme that cooperates the closed cycle oven dry for the purpose of energy savings, and this type of scheme has obtained practice in the equipment of oven dry moisture.Chinese patent CN101002991 discloses a kind of solvent reclaimer of loop circuit, the operation that the pressure fan that printing or painting device are established a calandria is dried for baking box, utilize air exhauster that heat exchanger, radiator and the condenser that the solvent that volatilizees is evacuated to reclaimer carried out three coolings again, make the solvent of volatilization carry out liquid gas and separate and be recovered in the condensation accumulator tank, and cold air promptly is sent to the pressure fan of evaporimeter, heat exchanger and calandria thereof and carries out three times and heat; Whereby, making the solvent of volatilization be able to store collected recycles in the condensation accumulator tank, and then the consumption of reduction solvent, gas with the volatilization in season can circulate and the anti-anxiety that leaks in this loop fully, pollute and air pollution with the water of avoiding the traditional printing device to be caused really, and then effectively improve environmental benefit and save the energy.
But analyse in depth the device structure complexity that this patent documentation discovery is provided, efficiency of energy utilization is low, lacks good cooperating with process equipment, and equipment cost and operating cost are all very high, makes this patent documentation lack practicality.
Purpose for environmental protection, the discharging of a plurality of countries such as America and Europe strict restriction organic vapor, industry adopts solvent-free processing scheme such as water color ink, water paint and equipment at present with development be striving direction, but water can't compare favourably with good dissolving, the dilution capacity of organic solvent all the time, adopt water color ink, water paint product processed chromaticity relatively poor, material and equipment are all relatively more expensive, and the baking needed energy consumption is bigger.And similar process equipment such as coating machine, dry compound machine, intaglio press, metallic plate roller coating line and institute's converted products all relate to the wide traditional industries of face width, so, need find and meet recycling economy, cleaner production, to can take into account environmental protection, safe, energy-conservation, quality and economic benefit solution, ensure that industry is continued to develop healthily, this also is that the present invention expects the social responsibility born.
In sum, existing drying plant has following shortcoming: 1, oven dry gas is difficult to satisfy the stoving process requirement with advancing with going out.2, the gas flow purging stroke is short, and throughput is little, and drying efficiency is low, and casing is long, and the control difficulty is big.3, Btu utilization efficient is low, and energy consumption is excessive, the operating cost height.4, the air channel complex interface is many, and gas easily leaks, and fan noise is big, and the feature of environmental protection is poor.5, complex structure, huge heaviness, expend great deal of steel, the manufacturing cost height.6, installation and transportation trouble, expense height, it is big to take the factory building space.7, organic solvent is harmful to human body and environment, and directly discharging causes polluting.8, exist the utmost point that the organic solvent of economic worth and a large amount of heats are arranged in the waste gas, can not make a silk purse out of a sow's ear causes producing exorbitant expenditure, and processing benefit descends.9, for reduce add hot-air energy consumption just needs reduce the flow of fresh air, but there is serious potential safety hazard in the concentration that can cause organic steam above the explosion limit accident of blasting.10, adopt natural air in a large number, make processing be limited by climatic environment, when ambient air temperature was low, it was huge to heat required energy consumption, even can't satisfy the oven dry needs and cause stopping production.11, the dust in the natural air influences the crudy of product.
Summary of the invention
Purpose of the present invention is in order a kind of integral overlapping drying equipment to be provided, to be applicable to the thin strip-shaped object process equipment, can overcome most of shortcoming of existing drying plant, has the characteristics of compact conformation, superior performance, flexible and changeable, energy-conserving and environment-protective.
Purpose of the present invention can reach by following technical solution:
Integral overlapping drying equipment, its design feature is:
1) comprises casing, blowing unit and heat pump assembly; Described casing comprises oven cover, base, is provided with printing inlet, printing outlet on casing; In oven cover, be provided with mutual end to end drying cavity and recycling cavity, constitute the gas passage of inner loop oven dry;
2) described blowing unit is installed in the drying cavity; Blowing unit comprises blower fan, is provided with air intake passage, air exhaust passage, air-out passage in blowing unit;
3) described heat pump assembly comprises heat pump compressor, heat pump choke valve, evaporative condenser, heat pump condenser, refrigeration compressor, refrigerating evaporator and refrigeration choke valve; Evaporative condenser, heat pump compressor, heat pump condenser, heat pump choke valve link to each other successively, the head and the tail circulation, constitute heat pump; Evaporative condenser, refrigeration choke valve, refrigerating evaporator link to each other successively with cold compressor, the head and the tail circulation, constitute refrigeration system; Heat pump and refrigeration system realize overlapping by evaporative condenser, form heat pump assembly jointly; Heat pump condenser is installed in the drying cavity, and refrigerating evaporator is installed in the recycling cavity.
Blower fan is a cross flow fan, comprises deflector, stabilier, through-flow impeller; Blower fan adopts the laterally cross flow fan of air-supply, and blowing unit is built in the oven cover, has broken through the restriction of legacy equipment, makes structure become simple compact, and stoving process improves, and drying effect is significantly improved; Heat pump and refrigeration system realize overlapping by evaporative condenser, form the heat pump assembly of high temperature difference jointly; Heat pump condenser is installed in and is used to add hot-air in the drying cavity and dries, and refrigerating evaporator is installed in and is used to reclaim latent heat and condensing solvent steam in the recycling cavity, obtains energy-conservation and effect environmental protection simultaneously.
Link to each other by copper pipe between each parts of heat pump; actual heat pump also can comprise accessories such as reservoir, vapour liquid separator, oil eliminator, liquid mirror, stop valve usually, all belongs to known technology, and the present invention is for the purpose of simplified illustration book; do not described in detail, do not influenced integrality of the present invention.
Purpose of the present invention can also reach by following technical solution:
A kind of embodiment of the present invention is: described oven cover also comprises outer cover part, partition component, frame parts; Drying cavity is surrounded by partition component, frame parts and base, and recycling cavity is surrounded by partition component, frame parts and outer cover part.
A kind of embodiment of the present invention is: described heat pump assembly also comprises the heat pump cooler, and the heat pump cooler is connected between heat pump compressor and the heat pump condenser, and the heat pump cooler is installed in the drying cavity.
Heat pump compressor is discharged in the Compressed Gas and is comprised sensible heat and latent heat, and sensible heat is presented as that delivery temperature is higher than condensation temperature, and the calorific value of sensible heat is little but of high grade, and sensible heat accounts for 20%～35% of total heating capacity usually in heat pump, and delivery temperature can be up to 130 ℃.Adopt the purpose of heat pump cooler to be difference use sensible heat and latent heat, can under the situation that does not improve condensation temperature, obtain the highest bake out temperature between condensation temperature and delivery temperature.The highest bake out temperature of printing machine demand generally is higher than 80 ℃, and the condensation temperature during the economic reliability service of heat pump generally is no more than 65 ℃, adopt the heat pump cooler to cooperate the control of air quantity can satisfy the demand of high bake out temperature, and economy or compressor life-span that needn't the sacrificial system operation.
A kind of embodiment of the present invention is: described heat pump assembly also comprises the heat pump subcooler, and the heat pump subcooler is connected heat pump cooler heat pump and presses between the choke valve, and the heat pump subcooler is installed in the drying cavity.
The heat pump subcooler is used to discharge the heat of saturated condensate liquid, makes worker quality liquid cross cold and lifting cooling and warming coefficient, the temperature decrease speed of slowing down oven dry gas simultaneously.
A kind of embodiment of the present invention is: described heat pump assembly also comprises evaporator with heat pump, and evaporator with heat pump is connected between evaporative condenser and the heat pump choke valve, and evaporator with heat pump is installed in the recycling cavity.
Evaporator with heat pump is used for reclaiming the sensible heat of oven dry gas, reduces low temperature level refrigeration demand, improves comprehensive Energy Efficiency Ratio, makes heat pump assembly flexible adaptation dry heat demand.
A kind of embodiment of the present invention is: described heat pump assembly also comprises refrigerant condenser, and refrigerant condenser is connected between refrigeration choke valve and the evaporative condenser, and refrigerant condenser is installed in the recycling cavity.
After the evaporative condenser condensation, working medium enters refrigerant condenser and in most of the cases is in supercooled state, is used to discharge the heat intensification oven dry gas temperature of saturated condensate liquid, makes worker quality liquid cross cold and lifting cryogenic refrigeration ability simultaneously.
A kind of embodiment of the present invention is: described heat pump assembly also comprises heat pump subcooler, heat pump cooler, evaporator with heat pump, refrigerant condenser; Refrigeration compressor, evaporative condenser, refrigerant condenser, refrigeration choke valve, refrigerating evaporator link to each other successively, the head and the tail circulation; Heat pump compressor, heat pump cooler, heat pump condenser, heat pump subcooler, heat pump choke valve, evaporator with heat pump, evaporative condenser link to each other successively, the head and the tail circulation; Heat pump subcooler, heat pump cooler are installed in the drying cavity; Evaporator with heat pump and refrigerant condenser are installed in the recycling cavity, and refrigerating evaporator is installed between evaporator with heat pump and the refrigerant condenser.
Content of the present invention provides a kind of and improves and unique cascade type heat pump system, can realize under higher Energy Efficiency Ratio that system's evapo tranpiration temperature reaches 130K with total condensation temperature difference and gets effect, make baking oven provided by the present invention can finish the dual role of oven dry and solvent recovery efficiently.
The unique distinction of the heat pump assembly that provides is, after adopting evaporative condenser, has also used evaporator with heat pump to realize that sensible heat reclaims, and reduces low temperature level refrigeration demand; It is cold also to use refrigerant condenser to realize, improves the efficient of low temperature level refrigeration, obtains higher coefficient of refrigerating performance, has widened the adaptability of heat pump assembly to the oven dry demand.
Increase heat exchange of heat pipe transfer sensible heat and also can reduce the refrigerating capacity demand before and after refrigerating evaporator, but also need to increase the lubricating condition that regenerator improves refrigeration compressor, system's composition and pipeline are relatively complicated.
A kind of embodiment of the present invention is: described oven cover comprises at least six blowing units, at least six blowing units are arranged along printing inlet order before and after the printing Way out, and the air intake passage of last blowing unit links to each other with the air exhaust passage of back one blowing unit; Baking oven is provided with low-temperature zone, middle-temperature section, high temperature section, cooling section along the printing inlet to the printing Way out; Low-temperature zone comprises blowing unit and heat pump subcooler, and middle-temperature section comprises heat pump condenser and at least two blowing units, and high temperature section comprises heat pump cooler and at least two blowing units, and cooling section comprises blowing unit.
Progressive part is to have adopted reverse air-supply drying mode, and disposed the drying heater in the baking oven by perfect stoving process demand, realized the different purposes of heat pump condenser, adopted cooling section to reclaim heat and realized further energy-conservation and perfect technology with heat pump cooler and heat pump subcooler.
Described oven cover also comprises new aerofoil, inlet air door, return air air door; High temperature section comprises new aerofoil 8 and inlet air door, establishes new wind passage between cooling section and the middle-temperature section, and described new wind passage is surrounded by new aerofoil and partition component.
Purpose is to provide a kind of concrete grammar that uses sensible heat and latent heat of distinguishing, and inlet air door cooperates with the heat pump cooler can obtain stoving process the highest required bake out temperature.New wind passage set up the heat exchange efficiency that has improved heat pump condenser, make heat pump assembly can obtain higher Energy Efficiency Ratio.
Set up inlet air door at more blowing unit and can obtain meticulousr temperature control effect, but can cause control procedure too complicated, influence the stability of system and increase manufacturing cost.
A kind of embodiment of the present invention is: described frame parts comprises front beam, rear cross beam, Zuo Qiang, right wallboard; Described left wallboard, right wallboard are established air vent; Described blower fan also comprises deflector, stabilier; Described partition component, new aerofoil, deflector, stabilier, through-flow impeller, inlet air door, return air air door all are assemblied on left wallboard and the right wallboard; Impeller edge, described through-flow impeller left side apart from left wallboard distance and impeller edge, right side apart from the difference of right wallboard distance greater than 30 millimeters.
Purpose is to provide a kind of complete succinct assembly structure scheme, provided the solution of utilizing air vent to improve the transmission device condition of work and reducing the external heat radiation of baking oven simultaneously, give and utilize asymmetric setting of through-flow impeller to realize gas flow in the base, improve the method for the coefficient of heat transfer.
A kind of embodiment of the present invention is: described heat pump assembly also comprises heat pump cabinet and control device, and control device, evaporative condenser, heat pump compressor, refrigeration compressor are installed in the source pump case; Described heat pump choke valve is an electromagnetic expanding valve, and described heat pump compressor is a frequency-changeable compressor; Described inlet air door, return air air door are stepper motor driven MOD; Described heat pump choke valve, inlet air door, all controlled device control of return air air door.Described control device comprises temperature sensor and solvent strength sensor; Described heat pump choke valve, inlet air door, return air air door are controlled by frequency-variable controller all.
The present invention makes described drying plant can adapt to the oven dry changes in demand automatically, makes drying plant have more performance.
The invention has the beneficial effects as follows:
1, the present invention is at first broken the whole up into parts original external air intake blower fan, heater and air channel, adopt small and exquisite blower fan to be built in the oven cover, substitute the air channel of original complex structure and function singleness by inner dexterous air channel, the effect that obtains compact conformation, saves space and minimizing material consumption, and the realization closed cycle, for the solvent condenses retracting device provides suitable installing space.On structure improved basis, adopt the overlapping heat pump to satisfy oven dry and heat demand and condensation recovery refrigeration demand.By air flow direction, add the hierarchical arrangement of heat, throughput, obtain meticulous stoving process adaptive capacity, reach the target that improves dries quantity and cut down the consumption of energy; Utilize heat pump to provide heat energy to obtain higher heat pump efficiency coefficient by minute grade, avoid or reduce and utilize high-grade heat energy; Further change waste gas condensation recovery process again, improve coefficient of refrigerating performance, enlarge the scope of application of heat pump.The cold air recovery heat, improvement equipment working environment, the minimizing equipment that utilize removal process to produce externally dispel the heat.At last, reach zero toxic emission, energy-conservation target for energy-saving and emission-reduction more than 60%.
2, drying plant provided by the invention not only structure simplify greatly than legacy equipment, occupation area of equipment significantly reduces, manufacturing cost and installation and transportation expense significantly descend, and the oven dry performance significantly promotes, printing is avoided dust pollution in the environment, can also realize that zero toxic emission, whole solvent recovery, energy resource consumption reduce more than 60%, its social benefit and economic benefit are very remarkable.
3, the present invention is used to dry the thin strip-shaped object (hereinafter to be referred as printing) of advancing continuously, is widely used in similar process equipments such as coating machine, compounding machine, printing machine, roller coating line, gluing machine, also can be used for drying the article of continuous transmission.Inspired by the present invention and based on this, those skilled in the art can carry out various improvement to the design of existing product.Described drying plant has multiple temperature sections oven dry, non-exhaust emission, solvent and reclaims entirely.
Description of drawings
Fig. 1 is the baking oven generalized section of the specific embodiment of the invention 1.
Fig. 2 is the oven cover agent structure generalized section of the specific embodiment of the invention 1.
Fig. 3 is the baking oven supply air system generalized section of the specific embodiment of the invention 1.
Fig. 4 is the baking oven heating system generalized section of the specific embodiment of the invention 1.
Fig. 5 is the oven cover right side view of the specific embodiment of the invention 1.
Fig. 6 is the unassembled outer cover part front view of the baking oven of the specific embodiment of the invention 1.
Fig. 7 is the oven cover left side view of the specific embodiment of the invention 1.
Fig. 8 is the heat pump casing structure schematic diagram of the specific embodiment of the invention 1.
Fig. 9 is the heat pump assembly schematic diagram of the specific embodiment of the invention 1.
Figure 10 is the oven cover generalized section of the specific embodiment of the invention 2.
Figure 11 is the unassembled outer cover part front view of the baking oven of the specific embodiment of the invention 2.
Figure 12 is existing printing machine drying plant oven structure schematic diagram.
Figure 13 is existing printing machine drying plant hot air apparatus structural representation.
The specific embodiment
Specific embodiment 1:
Fig. 1 to Fig. 9 constitutes specific embodiments of the invention 1.
Present embodiment is the drying plant that is applicable to the solvent-borne type printing machine.
Fig. 1 to Fig. 8 provides the detailed structure of the described drying plant of present embodiment, and Fig. 9 provides the heat pump assembly schematic diagram of present embodiment.
The corresponding relation of component names and Reference numeral is as shown in table 1 in each accompanying drawing.
Table 1: component names and Reference numeral correspondence table
| 00—— 10—— 20—— 01—— 11—— 21—— 02—— 12—— 22—— 03—— 13—— 23—— 04—— 14—— 24—— 16—— 25—— 17—— 26—— 18—— 27—— 19—— 28—— 29—— 30—— 40—— 50—— 31—— 41—— 51—— 32—— 42—— 52—— 33—— 43—— 70—— 34—— 44—— 38—— 45—— 39—— 46—— 47—— 48—— 49—— 60—— 80—— 93—— 61—— 81—— 96—— 62—— 82—— 97—— 63—— 83—— 98—— 64—— 85—— 99—— 66—— 86—— 67—— 87—— 68—— 88—— 69—— 89—— |
As shown in Figure 1 and Figure 2, baking oven 10 comprises oven cover 20, base 50, is provided with printing inlet 03, printing outlet 04.
As shown in Figure 3, blowing unit 60 comprises blower fan 30, is provided with air intake passage 63, air exhaust passage 64, air-out passage 68, and blowing unit 60 is installed in the drying cavity 13; Blower fan 30 is cross flow fans, comprises deflector 31, stabilier 32, through-flow impeller 33.Oven cover 20 also comprises the cycling element 41 that is installed in the drying cavity 13, cycling element 41 comprises blower fan 30 and return air air door 67, cycling element 41 can overcome the recovery approach windage and guarantee the global cycle air quantity, can avoid drying gas and leak, can adjust return air air door 67 according to the oven dry demand and change the global cycle air quantity from printing inlet 03.
Nine blowing units 60 are arranged along printing inlet 03 order before and after printing exports 04 direction, and the air intake passage 63 of last blowing unit 60 links to each other with the air exhaust passage 64 of back one blowing unit 60, and 64E links to each other with 63F as shown in FIG..
Adopt the laterally cross flow fan of air-supply, blowing unit 60 is built in the oven cover 20, broken through the restriction of legacy equipment, make structure become simple compact, stoving process improves, and drying effect is significantly improved.
As shown in Figure 9, heat pump assembly 80 is a kind of improving and unique cascade type heat pump system, can realize under higher Energy Efficiency Ratio that system's evapo tranpiration temperature and total condensation temperature difference reach the effect of 130K, make baking oven that present embodiment provides can finish the dual role of oven dry and solvent recovery efficiently.Heat pump assembly 80 comprises heat pump compressor 89, heat pump cooler 83, heat pump condenser 88, heat pump subcooler 82, heat pump choke valve 87, evaporator with heat pump 86, evaporative condenser 85, the heat pump compressor 89 that links to each other successively and the refrigeration compressor 99 that links to each other successively, evaporative condenser 85, refrigerant condenser 98, choke valve 97, refrigerating evaporator 96, refrigeration compressor 99 freeze.
Fig. 9 also provides the reference value of working medium and oven dry gas temperature, and temperature is the temperature that working medium passes in and out these parts in the picture frame, and dotted line is oven dry gas flow process, and picture frame external standard temperature indicating degree is the flow through turnover temperature of these parts of oven dry gas.As can be seen, the condensation temperature of high temperature level is 65 ℃, and maximum subcooled temperature is 25K, and evaporating temperature is 10 ℃, and the degree of superheat is 5K; Low temperature level condensation temperature is 20 ℃, and maximum subcooled temperature is 50K, and evaporating temperature is-40 ℃, and the degree of superheat is 50K.The highest bake out temperature that equipment can provide can surpass 80 ℃, can satisfy the demand of printing oven dry.
As shown in Figure 4, baking oven 10 exports 04 direction along printing inlet 03 to printing and is provided with low-temperature zone 16, middle-temperature section 17, high temperature section 18, cooling section 19.
Low-temperature zone 16 comprises blowing unit 60H, 60I and heat pump subcooler device 82H, 82I.Middle-temperature section 17 comprises blowing unit 60E, 60F, 60G and heat pump condenser 88E, 88F, 88G, and high temperature section 18 comprises blowing unit 60B, 60C, 60D and heat pump cooler 83B, 83C, 83D, and cooling section 19 comprises blowing unit 60A.
With reverse air-supply drying mode segmentation oven dry, utilize heat pump condenser 88, heat pump cooler 83, heat pump subcooler 82 to realize different bake out temperatures, disposed drying heater in the baking oven 10 by perfect stoving process demand, adopted cooling section to reclaim heat and realized further energy-conservation and perfect technology.
As Fig. 5～shown in Figure 7, oven cover 20 also comprises blower motor 38 and driving belt 39, and blower motor 38 is installed in the recycling cavity 14, drives all blower fans 30 by driving belt 39.Blower motor 38 is installed in and can reduces the operating temperature of blower motor 38 in the recycling cavity 14 and reclaim the heat that it distributes.
Shown in 33J among Fig. 6, difference apart from right wallboard 27 distances is 33 millimeters to impeller edge, through-flow impeller 33 left side apart from left wallboard 26 distances and impeller edge, right side, the asymmetric setting of through-flow impeller 33 realized gas flow in the base 50, improved the coefficient of heat transfer of printing 00 with oven dry gas.
As shown in Figure 8, heat pump assembly 80 also comprises heat pump cabinet 81 and control device 70, and heat pump compressor 89, control device 70, refrigeration compressor 99, evaporative condenser 85 are installed in the source pump case 81.Heat pump choke valve 87, refrigeration choke valve 97 all are installed in the oven cover 20 nearby, and each parts of heat pump assembly 80 connect by copper pipe.
In the present embodiment, refrigeration choke valve 97 adopts capillary, and heat pump choke valve 87 is electromagnetic expanding valves, and heat pump compressor 89 is frequency-changeable compressors; Inlet air door 66, return air air door 67 are stepper motor driven MOD; Control device 70 comprises temperature sensor and solvent strength sensor, and sensor is installed in the oven cover 20; The control of heat pump choke valve 87, inlet air door 66, all controlled device 70 of return air air door 67.Drying plant that present embodiment provides can adapt to the oven dry changes in demand automatically.
Drying course along printing 00 direct of travel is as follows:
The course of work along the oven dry gas flow direction is as follows:
Following process is to be ethyl acetate at solvent, under the situation of total solvent oven dry amount 5g/s.
About 15 ℃, solvent steam concentration be 0.26% (vol, percentage by volume, down with) gas enter blowing unit 60A, through being warmed up to about 25 ℃ the essentially no variation of solvent steam concentration after the cycle purge printing 00.
Distribute through inlet air door 66, gas divides two-way to enter high temperature section 18 and middle-temperature section 17 respectively.
The new wind flow that enters high temperature section is very little, and wherein part flows into blowing unit 60B and is heated to 80 ℃ or higher by heat pump cooler 83.By the portion gas after the 60B heating and the 60C that flows through after the new wind that does not flow to 60B mixes, part is sucked and is heated to about 75 ℃ by 60C, equally, by the portion gas after the 60C heating with flow to 60D after the mist that does not flow to 60C mixes again, heat to about 70 ℃ through the 60D circulation, the gas in part discharge and the new wind passage 62 is mixed into middle-temperature section 17.Because the quantity of solvent in high temperature section oven dry evaporation is little, mix behind the new wind that the concentration of solvent vapo(u)r just slightly improves in the gas, greatly about about 0.3%.
The gas that enters middle-temperature section is under the heating of heat pump condenser 88, temperature is between 55～60 ℃, solvent evaporates in a large number during this period, solvent steam concentration rises to about 0.5% in the gas, solvent evaporation and printing 00 temperature rise and have absorbed the heat of heat pump condenser 88 dispensings, the temperature that gas is entered after the low-temperature zone drops to about 45 ℃, in low-temperature zone, though temperature is lower, the exposed area of solvent is big on the printing 00, so evaporation rate is also very fast, heat pump subcooler release heat is slowed down decrease of temperature.The concentration of solvent rises to about 0.7% at last in the gas, is equivalent to 30% of lower explosive limit LEL2.2%.
The gas temperature of sending into recycling cavity 14 through cycling element 41 about about 35 ℃, enters refrigerating evaporator 96 and continues cooling greatly after cooling to 15 ℃ behind the evaporator with heat pump 86 recovery section sensible heats.The evaporating temperature of refrigerating evaporator 96 is-40 ℃, but the degree of superheat of latter end is higher, and purpose is to improve the condition of work of refrigeration compressor.Gas is reverse heat-exchange in refrigerating evaporator 96, and solvent vapo(u)r wherein constantly is condensed into liquid and flows to liquid trap 93, and gas cools to about-35 ℃ at last, and the concentration of solvent vapo(u)r is reduced to the saturated concentration 0.26% under this temperature.Subsequently, gas enters heat pump condenser 98 reverse heat-exchanges and is warmed up to 15 ℃, leaves recycling cavity 14 and enters the process that drying cavity 13 is finished the oven dry gas circulation.
Because the sensible heat of the latent heat of solvent evaporation and gas heating all is recovered utilization, the power that drying plant that present embodiment provides 10 compressors and blower fan consume should equal the heat energy that equipment dispels the heat to environment and printing 00 heats up and consumed.Since oven cover 20 adopt the new vane of low temperature around the insulation measure, in most cases not only can not dispel the heat to environment, also can from environment, absorb heat, base 50 is if take simple heat insulation measure, should reach thermal balance basically between drying plant and the environment, the main body that absorbs heat is a printing 00.Owing to increased the heat of cooling section recovery printing 00, and be subjected to the restriction of the coefficient of heat transfer, heat exchange area and heat-exchange time, the heat that printing 00 absorbs is very limited, even be low to moderate at operating ambient temperature under 0 ℃ the extreme case, 1.3 the printing element of rice width uses the required oven dry electric power of baking oven that present embodiment provides to have only about 5kw, compare with existing drying plant, energy-conservation up to 80%.And under extreme case, legacy equipment can't satisfy the demand of oven dry at all, and northerly performance in winter is particularly outstanding.
Specific embodiment 2:
Present embodiment is the drying plant that is applicable to the solvent-borne type printing machine of operation under the extreme case.
Figure 10, Figure 11 are the accompanying drawing of the specific embodiment of the invention 2, embody present embodiment and specific embodiment 1 difference and are:
The blower fan 30K that utilizes blower motor 38 direct-connected drivings is as cycling element 41, and the return air air door is corresponding to be moved.
Lengthening oven cover 20 increases low-temperature zone 16 blowing unit 60J, has strengthened effective oven dry area.
With the heat pump cooler 83B that heater 48 substitutes in the specific embodiment 1, described heater 48 is PTC electric heaters, uses heater 48 to produce and surpasses 100 ℃ hot blast, satisfies the extreme demand of printing machine.
Under normal circumstances, high temperature heater (HTH) can not start, and blowing unit 60B becomes the preheating unit of high temperature section 18, improves the temperature that enters high temperature section gas with the heat of printing 00, obtains printing 00 better cooling effect, makes equipment more energy-conservation.
Take the purpose of above measure to be to strengthen the drying capacity of drying plant, satisfy the demand of high speed printing and extreme environment.
All the other each parts and the course of work and specific embodiment 1 are same or similar, do not repeat them here.
The obvious improvement part of the present invention is to dry that performance is good, zero toxic emission, full solvent recovery, low energy expenditure, low noise pollution, small footprint size, easily transportation is installed, and the present invention can bring bigger social benefit and economic benefit.
Claims (10)
1, integral overlapping drying equipment is characterized in that:
1) comprises casing (10), blowing unit (60) and heat pump assembly (80); Described casing (10) comprises oven cover (20), base (50), is provided with printing inlet (03), printing outlet (04) on casing (10); In oven cover (20), be provided with mutual end to end drying cavity (13) and recycling cavity (14), constitute the gas passage of inner loop oven dry;
2) described blowing unit (60) is installed in the drying cavity (13); Blowing unit (60) comprises blower fan (30), is provided with air intake passage (63), air exhaust passage (64), air-out passage (68) in blowing unit (30);
3) described heat pump assembly (80) comprises heat pump compressor (89), heat pump choke valve (87), evaporative condenser (85), heat pump condenser (88), refrigeration compressor (99), refrigerating evaporator (96) and refrigeration choke valve (97); Evaporative condenser (85), heat pump compressor (89), heat pump condenser (88), heat pump choke valve (87) link to each other successively, the head and the tail circulation, constitute heat pump; Evaporative condenser (85), refrigeration choke valve (97), refrigerating evaporator (96) link to each other successively with cold compressor (99), the head and the tail circulation, constitute refrigeration system; Heat pump and refrigeration system realize overlapping by evaporative condenser (85), form heat pump assembly jointly; Heat pump condenser (88) is installed in the drying cavity (13), and refrigerating evaporator (96) is installed in the recycling cavity (14).
2, integral overlapping drying equipment according to claim 1 is characterized in that: described oven cover (20) also comprises outer cover part (21), partition component (22), frame parts (23); Drying cavity (13) is surrounded with base (50) by partition component (22), frame parts (23), and recycling cavity (14) is surrounded with outer cover part (21) by partition component (22), frame parts (23).
3, integral overlapping drying equipment according to claim 1 and 2, it is characterized in that: described heat pump assembly (80) also comprises heat pump cooler (83), heat pump cooler (83) is connected between heat pump compressor (89) and the heat pump condenser (88), and heat pump cooler (83) is installed in the drying cavity (13); Or described heat pump assembly (80) also comprises heat pump subcooler (82), and heat pump subcooler (82) is connected between heat pump condenser (88) and the heat pump choke valve (87), and heat pump subcooler (82) is installed in the drying cavity (13).
4, integral overlapping drying equipment according to claim 1 and 2, it is characterized in that: described heat pump assembly (80) also comprises evaporator with heat pump (86), evaporator with heat pump (86) is connected between evaporative condenser (85) and the heat pump choke valve (87), and evaporator with heat pump (86) is installed in the recycling cavity (14).
5, integral overlapping drying equipment according to claim 1 and 2, it is characterized in that: described heat pump assembly (80) also comprises refrigerant condenser (98), refrigerant condenser (98) is connected between refrigeration choke valve (97) and the evaporative condenser (85), and refrigerant condenser (98) is installed in the recycling cavity (14).
6, integral overlapping drying equipment according to claim 2 is characterized in that: described heat pump assembly (80) also comprises heat pump subcooler (82), heat pump cooler (83), evaporator with heat pump (86), refrigerant condenser (98); Refrigeration compressor (99), evaporative condenser (85), refrigerant condenser (98), refrigeration choke valve (97), refrigerating evaporator (96) link to each other successively, the head and the tail circulation; Heat pump compressor (89), heat pump cooler (83), heat pump condenser (88), heat pump subcooler (82), heat pump choke valve (87), evaporator with heat pump (86), evaporative condenser (85) link to each other successively, the head and the tail circulation; Heat pump subcooler (82), heat pump cooler (83) are installed in the drying cavity (13); Evaporator with heat pump (86) is installed in the recycling cavity (14) with refrigerant condenser (98), and refrigerating evaporator (96) is installed between evaporator with heat pump (86) and the refrigerant condenser (98).
7, integral overlapping drying equipment according to claim 7, it is characterized in that: described oven cover (20) comprises at least six blowing units (60), described at least six blowing units (60) are arranged along printing inlet (03) order before and after printing outlet (04) direction, and the air intake passage (63) of last blowing unit (60) links to each other with the air exhaust passage (64) of back one blowing unit (60); Baking oven (10) is provided with low-temperature zone (16), middle-temperature section (17), high temperature section (18), cooling section (19) along printing inlet (03) to printing outlet (04) direction; Low-temperature zone (16) comprises blowing unit (60) and heat pump subcooler (82), middle-temperature section (17) comprises heat pump condenser (88) and at least two blowing units (60), high temperature section (18) comprises heat pump cooler (83) and at least two blowing units (60), and cooling section (19) comprises blowing unit (60).
8, integral overlapping drying equipment according to claim 8 is characterized in that: described oven cover (20) also comprises new aerofoil (28), inlet air door (66), return air air door (67); High temperature section (18) comprises new aerofoil (28) and inlet air door (66), establishes new wind passage (62) between cooling section (19) and the middle-temperature section (17), and described new wind passage (62) is surrounded by new aerofoil (28) and partition component (22).
9, integral overlapping drying equipment according to claim 9 is characterized in that: described frame parts (23) comprises left wallboard (26), right wallboard (27), and described left wallboard (26), right wallboard (27) are established air vent (29); Described blower fan (30) also comprises deflector (31), stabilier (32), through-flow impeller (33); Described partition component (22), new aerofoil (28), deflector (31), stabilier (32), through-flow impeller (33), inlet air door (66), return air air door (67) all are assemblied on left wallboard (26) and the right wallboard (27).
10, according to Claim 8 or 9 described integral overlapping drying equipments, it is characterized in that: described heat pump assembly (80) also comprises heat pump cabinet (81) and control device (70), and control device (70), evaporative condenser (85), heat pump compressor (89), refrigeration compressor (99) are installed in the source pump case (81); Described heat pump choke valve (87) is an electromagnetic expanding valve, and described heat pump compressor (89) is a frequency-changeable compressor; Described inlet air door (66), return air air door (67) are stepper motor driven MOD; Described heat pump choke valve (87), inlet air door (66), all controlled device of return air air door (67) (70) control.
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| CN 200910192211 CN101648181B (en) | 2009-09-10 | 2009-09-10 | Integral overlapping drying equipment |
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| CN 200910192211 CN101648181B (en) | 2009-09-10 | 2009-09-10 | Integral overlapping drying equipment |
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| CN101648181B CN101648181B (en) | 2013-01-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102198337A (en) * | 2010-03-22 | 2011-09-28 | 杨峥雄 | Environment-friendly energy-saving exhaust gas treatment device and method |
| CN109827418A (en) * | 2019-01-24 | 2019-05-31 | 佛山市南海翔瀚制冷设备有限公司 | A kind of high temperature overlapping dryer |
| CN111118790A (en) * | 2020-01-21 | 2020-05-08 | 汕头市联和环保科技有限公司 | Intelligent energy-saving control system for steam heating of setting machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201220506Y (en) * | 2008-05-20 | 2009-04-15 | 杨栋 | Drying apparatus of textile printing machine |
| CN201214303Y (en) * | 2008-06-30 | 2009-04-01 | 陕西北人印刷机械有限责任公司 | Full-automatic circulation drying device |
-
2009
- 2009-09-10 CN CN 200910192211 patent/CN101648181B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102198337A (en) * | 2010-03-22 | 2011-09-28 | 杨峥雄 | Environment-friendly energy-saving exhaust gas treatment device and method |
| CN109827418A (en) * | 2019-01-24 | 2019-05-31 | 佛山市南海翔瀚制冷设备有限公司 | A kind of high temperature overlapping dryer |
| CN111118790A (en) * | 2020-01-21 | 2020-05-08 | 汕头市联和环保科技有限公司 | Intelligent energy-saving control system for steam heating of setting machine |
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