CN201534003U - Organic solvent drying recovering equipment - Google Patents
Organic solvent drying recovering equipment Download PDFInfo
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- CN201534003U CN201534003U CN2009200564297U CN200920056429U CN201534003U CN 201534003 U CN201534003 U CN 201534003U CN 2009200564297 U CN2009200564297 U CN 2009200564297U CN 200920056429 U CN200920056429 U CN 200920056429U CN 201534003 U CN201534003 U CN 201534003U
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Abstract
Organic solvent drying recovering equipment which is applied in drying and recovering organic solvent distributed in continuously moving band-shaped members comprises a hot-air drying device, a condensation recovery device and an air protection device. The equipment structure is characterized in that the air inlet of the hot-air drying device is connected with the air outlet of the condensation recovery device and the air outlet of the hot-air drying device is connected with the air inlet of the condensation recovery device. Thus an air circulation channel is formed in the inside of the hot-air drying device and the condensation recovery device. The band-shaped member entry channel from which the band-shaped members go into the hot-air drying device is applied as an air channel between the circulation channel and the outside environment. The air protection device is provided with an circulation channel inlet which is connected with the circulation channel. The utility model can be applied in upgrading the prior arts as well as designing and manufacturing novel equipment, which is fit for a single piece of equipment manufacturing and also a production line mixing a plurality of multiple equipments. Furthermore, the utility model can achieve the effects of energy saving, emission reduction and environmental protection with safety.
Description
[technical field]
The utility model provides a kind of oven dry reclaimer of organic solvent, be applicable to oven dry and reclaim the organic solvent that is distributed on the ribbon of advancing continuously, can be widely used in the equipment such as coating machine, compounding machine, printing machine, roller coating line, gluing machine, it relates to, and oven dry, gas separate, explosion-proof, heat exchange, refrigeration, technical field such as control automatically.
[background technology]
Utilization of the present utility model is to liking similar process equipments such as coating machine, compounding machine, printing machine, roller coating line, gluing machine.These equipment all have following feature: 1, institute's product processed or product base material are the ribbons of advancing continuously, as plastic sheeting, metal sheet etc., generally adopt unwinding and rewinding mechanism to realize advancing continuously, and processing continuously in the process of advancing.2, 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 one or more organic solvents for the purpose of dissolving, dilution, dispersion before transferring to product surface, could guarantee the quality that shifts like this.3, organic solvent is the required consumptive material of process, is not the part of final products, and therefore after the transfer covering was finished, institute's converted products must evaporate organic solvent by the drying plant of equipment.
Fig. 1 is traditional monomer-type drying plant schematic diagram, generally applies to organic solvent oven dry amount small device such as printing machine.Ribbon 00 is emitted from unreeling machine, the process transfer device is at the surface coverage desired substance, enter baking oven 11 through ribbon access road 103, hot-air brushes the surface of the ribbon 00 of advancing continuously, force organic solvent volatilization becoming organic vapor, ribbon 00 is dried after baking oven 11 is left in ribbon outlet 104, and is finished process by the winder rolling.Hot-air seasoning device 10 is generally by baking oven 11, heater 12, blower fan 13, blast pipe 14, inlet air door 15, backwind tube 16, return air air door 17, exhaust duct 18 is formed, natural air in the environment enters blast pipe 14 by hot-air seasoning device air inlet 101, inlet air door 15 can change intake, air enters baking oven 11 after blower fan 13 pressurizations and heater 12 heating, brush the surface of the ribbon 00 of advancing continuously, force organic solvent volatilization becoming organic vapor to mix the back with the air that enters baking oven 11 and form waste gas, the concentration of organic vapor generally is lower than 0.3% (vol) in the waste gas.Part waste gas is discharged into the atmosphere from hot-air seasoning device exhaust outlet 102 through exhaust duct 18, return baking oven after also having part waste gas by backwind tube 16, return air air door 17, blower fan 13, heater 12 heating, thereby reduce the amount of fresh air that enters, reduce the energy consumption that adds hot-air.Adjusting inlet air door 15 and return air air door 17 can change the flow and the mutual ratio of air intake, return air.
Fig. 2 is the box-like drying plant schematic diagram of traditional group, and drying plant is combined by a plurality of drying units (A, B, C, D, E, F) cascade, generally applies to the bigger equipment of organic solvent oven dry amount such as coating machine.The composition of each baking oven unit (adds A to operation to monomer drying plant shown in Figure 1 is similar behind each part name, as 11A etc., to show difference), the throughput of each unit and bake out temperature all can independently be adjusted, each unit combustion gas is pooled to exhaust duct 18 backs and is discharged in the atmosphere by air draft blower fan 19, this type of plant waste gases amount is very big, and the discharge capacity of each unit per hour surpasses 2000 cubic metres usually, and the single device total emission volumn surpasses a per hour ten thousand stere.
There is following problem in above-mentioned drying unit: 1, organic solvent is harmful to human body and environment, and directly discharging causes polluting; 2, 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; 3, 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; 4, 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; 5, the dust in the natural air influences the crudy of product.
As a kind of improvement project of above-mentioned drying unit, 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 literature 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 this patent documentation and find following problem, because organic steam can be blasted, for avoiding blast just organic vapor concentration must be controlled under the explosion limit, for control concentration just must be used bigger air circulation and lower condensation temperature, the benefit that causes condensation to be reclaimed is low, equipment cost and operating cost are all very high, make this patent documentation lack practicality.And closed cycle is all emphasized the necessary good seal of equipment, and the equipment that this patent documentation is used must allow institute's converted products walk by, cause the import and export air-tightness of institute's converted products relatively poor, especially the material of import department's product surface covering is dried as yet and is not allowed the object contact, be difficult to take seal approach completely, make closed cycle be difficult to utilization, and the problem that this patent documentation does not certainly exist at this point propose countermeasure, has the defective on the technical scheme.
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 development healthily, this also is the social responsibility that the utility model expectation is born.
[utility model content]
The purpose of this utility model aims to provide a kind of organic solvent oven dry reclaimer, realize safety and environmental protection, the energy-saving and emission-reduction of process equipments such as coating machine, compounding machine, printing machine, roller coating line, gluing machine, reach and reduce the environmental pollution that waste gas causes, the recovery organic solvent is increased economic efficiency, prevent that blast from guaranteeing safe production, reduce the energy resource consumption in the production process, lifting means institute converted products quality, reduce production process and be subjected to the amblent air temperature condition influence, to overcome weak point of the prior art.
For achieving the above object; general thought of the present utility model is: can't adopt relative closed cycle under the airtight fully situation at equipment; promptly under the situation of controlled limited discharging, realize recycling of most of protective gas; reduce toxic emission, for the protective gas that uses nitrogen, carbon dioxide etc. can play explosion-proof creates conditions as the oven dry protective gas as far as possible.Do not use outside natural air, make production process not be subjected to the amblent air temperature condition influence, the converted products quality also can not be subjected to the influence of dust in the air.Improve the concentration of organic vapor in the drying course after the use protective gas acquisition safety guarantee, the benefit that makes condensation method reclaim organic solvent promotes greatly.Adopt heat exchanger to reduce before the condensation gas temperature after the gas temperature and the condensation that raises, reclaim the heat of most of protective gas, further the energy consumption of reduction equipment operation.The purging effect that adds air blast is offset because of the influence of organic vapor concentration rising back to dries quantity.
According to above-mentioned utility model thinking, provide following utility model content:
1, a kind of oven dry reclaimer of organic solvent, comprise hot-air seasoning device, condensation retracting device and gas shield device, its architectural feature is: hot-air seasoning is put into gas port and is connected to condensation retracting device gas vent, hot-air seasoning device exhaust outlet is connected to condensation retracting device gas access, the inner space of hot-air seasoning device and condensation retracting device forms gas circulation channel, and ribbon enters the ribbon access road of hot-air seasoning device as the gas channel between circulation canal and the external environment condition; Gas shield device is provided with the circulation canal inlet and links to each other with circulation canal.
Gas shield device injects protective gas and inside is mixed gas in circulation canal discharges to external environment condition by the gas channel between circulation canal and the external environment condition; ribbon passes through from the hot-air seasoning device; hot-air seasoning device heated air is also ordered about the ribbon that gas purging is advanced continuously; impelling the organic solvent evaporation that is distributed on the ribbon is in organic vapor and the entrained gas; after the gas that hot-air seasoning device exhaust outlet is discharged enters the condensation retracting device; the part organic vapor reclaims after being condensed into liquid, and the gas that has reclaimed the part organic vapor that is condensed is circulated back in the hot-air seasoning device through condensation retracting device gas vent.
The hot-air seasoning device is identical with the drying plant major part of legacy equipment, usually form by baking oven, blower fan, heater, airduct, main difference is that its air intake, air draft compile the back respectively and dock with the condensation retracting device, form the gas circulation channel of relative closure, neither use extraneous air in a large number, also not to a large amount of discharging waste gas in outside.
The condensation retracting device is the industrial circle conventional equipment, is made up of refrigeration machine, condenser, reservoir usually, and refrigeration modes, gas cooled mode all have multiple choices, and a refrigeration machine can provide cold for the condensation retracting device of a plurality of oven dry reclaimers.The utility model is recommended to use and is adopted vapour compression refrigerator, adopts the R410A environmental protection refrigerant, and condenser adopts finned heat exchanger to realize gas cooled, and the condensation temperature range of choice is preferably between-35 ℃-5 ℃.
Gas in the circulation canal both can utilize the blower fan in the hot-air seasoning device to promote circulation, also can increase circulating fan separately and promote.Because between circulation canal and external environment condition gas channel is arranged, its air pressure inside is generally near environment atmospheric pressure.
The core of gas shield device is a source of the gas, and a source of the gas can be a plurality of oven dry reclaimer air feed simultaneously.The caisson, carbon-dioxide generator, membrane nitrogen machine, the pressure swing adsorption method nitrogen making machine that store finished product gas all can be used as source of the gas; the pressure of protective gas is all far above atmospheric pressure in the common source of the gas; and the pressure in the circulation canal is almost identical with atmospheric pressure; so do not need other power drive, protective gas can easily overcome blast any position injection in circulation canal that blower fan produces.
Its surface coverage material oven dry as yet when 2, entering the hot-air seasoning device owing to ribbon, the surface of ribbon does not allow the object contact and causes its inlet port to be difficult to sealing, and circulation canal is communicated with external environment condition, and equipment can't be airtight fully.So adopt relative closed cycle, under the situation of controlled limited discharging, realize recycling of most of protective gas.
Can guarantee that internal gas can discharge though inject protective gas; but under the influence of circulating current; if the ribbon inlet port is too opened wide; gas exchange phenomenon in inside and outside will take place under flow perturbation, and extraneous air also can destroy safety guarantee by the inner oxygen content that improves gas in the circulation canal of access arrangement.Therefore need take measures to control the circulation of inside and outside gas, realize controlled limited discharging.So a kind of oven dry reclaimer perfect in addition on utility model content 1 basis is provided: described ribbon access road is a contour or not contour narrow-gap channel, the ribbon access road is along greater than the minimum slit internal height of channel interior H 6 times of the length L of ribbon direct of travel, i.e. L/H＞6.The ribbon outlet is provided with a pair of rubber rollers to realize the shutoff to gas.
Adopt the purpose of narrow-gap channel to be to strengthen windage, avoid the influence of circulating current disturbance, make internal gas unidirectional external environment condition that is discharged under the driving of injecting protective gas formation pressure, prevent extraneous air access arrangement inside.The injection control of protective gas should make inner space gas oxygen content be lower than 16% (vol).Adopt the protective gas amount of gas flow that this mode discharges and injection roughly suitable,, can reach below 0.1% with respect to the waste gas discharge capacity of legacy equipment if other position air-tightness of equipment is good.
For avoiding the inside and outside gas communication, ribbon leaves the outlet of hot-air seasoning device need take strict airtight measure, at exit ribbon drying, the surface allows to contact with object, the measure that can take is more, as use two rubber rollers shutoff outlets to pressing, and allow ribbon to passing the rubber rollers of pressing, can adopt mode such as elastic doctor blade to realize airtight between casing to the rubber rollers of pressing and hot-air seasoning device.
Though 3, utility model content 2 described equipment waste gas discharge capacities are very little, but because organic vapor concentration may be more than 10 times of legacy equipment in the combustion gas, so still there is environmental pollution problems, and the waste gas that extractor fan extract to discharge need be installed near exhaust outlet discharge, or additionally increase small-sized absorbent charcoal adsorber waste gas is handled with a large amount of air dilutions back.
For eliminating exhaust emission more up hill and dale; a kind of oven dry reclaimer perfect in addition on utility model content 2 bases is provided: the circulation canal inlet of described gas shield device communicates with circulation canal; another ribbon admission passage inlet communicates with described ribbon access road, and the protective gas that injects by back one inlet forms the gas curtain that intercepts the inside and outside gas communication in the ribbon access road.Protective gas as gas curtain both can flow into circulation canal, also can flow out to external environment condition.Be that described gas shield device has 2 inlets at least; one of them ribbon admission passage inlet is installed in the ribbon access road; constitute the triplate line of connection circulation canal, external environment condition and a gas shield device; ribbon admission passage inlet is made up of a plurality of micropores or a plurality of slit; be distributed in the upper and lower sides or the both sides of ribbon access road, overcome the obstruct that ribbon causes.Other inlet communicates with circulation canal, and single hole injects and gets final product.
The protective gas that ribbon admission passage inlet discharges in the ribbon access road forms gas curtain, has both stoped device external air access arrangement inside, also stops internal gas to be discharged to external environment condition.
In the preparatory stage; open the inlet that is connected to circulation earlier and inject protective gas; making internal gas pass through the ribbon access road discharges; after treating that inner oxygen content reaches setting value; open ribbon admission passage inlet again and continue to inject protective gas, make that oxygen content is lower than 16% (vol) in the gas of inner space with stable flow rate.
Under the situation of equipment gas position good seal; the exhausted major part of the protective gas that ribbon admission passage inlet is discharged flows out to external environment condition and stops air to enter; the protective gas of trace is entering circulation canal with internal gas intersection exchange; have the organic vapor of trace simultaneously in the emission gases, but concentration and absolute discharge capacity all can satisfy environmental requirement.
Because the device interior partial pressure is higher than external pressure; have partial interior gas in the actual motion probably and leak into external environment condition; just leak as the ribbon exit than being easier to; at this moment; blower fan is provided with the position should ensure that the ribbon porch is the lower place of device interior air pressure; like this; the protective gas that ribbon admission passage inlet discharges partly flows out to external environment condition and stops air to enter; the part flow into circulation canal remedy equipment leakage to the outside gas flow keep internal pressure; extraneous air does not have the passage of access arrangement inside, and additional protective gas also plays the effect that reduces the internal gas oxygen content simultaneously.
Because moving component is arranged, even take seal approach, the exit that ribbon leaves the hot-air seasoning device still is possible leakage point, extracts gas leakage if there is leakage that extractor fan should be installed really, can also cool off ribbon with extractor fan simultaneously.
4, the oxygen content of monitoring gas at any time is safing necessary means; it also is the foundation of control shield gas flow rate; a kind of oven dry reclaimer perfect in addition on utility model content 1 basis is provided; its part also comprises oxygen content sensor and air valve; the probe of oxygen sensor is installed in the oxygen content that detects gas in the circulation canal in the circulation canal; air valve is connected between gas shield device source of the gas and the inlet by tracheae, is used to control the flow that injects the circulation canal protective gas.The detection data start-stop equipment that control device can provide according to sensor, warning, adjustment shield gas flow rate etc.; control device can also can increase function for oven dry reclaimer or the independent design and installation of gas shield device in the original control appliance of equipment.
5, provide a kind of oven dry reclaimer perfect in addition on utility model content 1 basis, described condensation retracting device comprises parts such as heat exchanger, condenser, refrigeration machine, reservoir, heat exchanger has two-way to isolate mutually but the gas channel of heat exchange mutually, one the tunnel as the cooling passage, another road is as the intensification passage, heat exchanger cooling channel outlet links to each other with the condenser gas access, heat exchanger intensification feeder connection links to each other with the condenser gas vent, enters before the condenser and through the gas heat exchange in heat exchanger behind the condenser.Use the purpose of heat exchanger to be to retrieve waste heat, reduce the required refrigerating capacity of condensation, reduce the input and the operating cost of condensing plant, energy savings from hot blast drying unit gas.Described heat exchanger is the gas sensible heat interchanger, can make with reference to the principle and the structural design of heat pipe air heat exchanger, air conditioner fresh air machine.
6, provide a kind of oven dry reclaimer perfect in addition on utility model content 5 bases, described its part of condensation retracting device also comprises a circulating fan, and the condensation retracting device comprises condenser, heat exchanger, circulating fan, reservoir, refrigeration machine.The air outlet of circulating fan links to each other with heat exchanger cooling feeder connection, sends into heat exchanger after the gas pressurized in the circulating fan extraction hot-air seasoning device.Use the purpose of circulating fan to be to increase the windage that blast overcomes heat exchanger, control air circulation flexibly.For obtaining good heat exchange effect, need in heat exchanger, form turbulent flow, cause windage bigger, need guarantee the flow of gas with higher blast.
7, a kind of oven dry reclaimer perfect in addition on utility model content 1 basis is provided, described hot-air seasoning device comprises baking oven at least, exhaust duct, blast pipe, backwind tube, blower fan and heater, the exhaust outlet of baking oven is connected to condensation retracting device gas access by exhaust duct, condensation retracting device gas vent is connected to the air inlet of blower fan by blast pipe, backwind tube is connected between exhaust duct and the blast pipe, the exhaust outlet of blower fan directly or be connected to the air inlet of heater by airduct, the air outlet of heater directly or by airduct is connected to the air inlet of baking oven, exhaust duct, blast pipe, backwind tube contains air door or does not contain air door.The technical program tradition simple in structure is highly suitable for adopting the equipment of small-sized drying plant, as printing machine.
Gas loops back baking oven from the baking oven exhaust outlet through exhaust duct, backwind tube, blast pipe, after blower fan pressurization, the heater heating and purges ribbon, discharges through the baking oven exhaust outlet again, finishes the oven dry circulation step.
Gas enters baking oven from the baking oven exhaust outlet through exhaust duct, condensation retracting device, blast pipe, after blower fan pressurization, the heater heating and purges ribbon, discharges through the baking oven exhaust outlet again, finishes the recovery circulation step.
If backwind tube installs air door additional, exhaust duct or blast pipe also install air door additional, needn't increase circulating fan in the condensation retracting device, oven dry purges with reclaiming circulation and all uses blower fan in the hot-air seasoning device, can regulate oven dry circulation and the air quantity ratio that reclaims circulation by the cooperation of air door.If but have heat exchanger and windage bigger in the condensation retracting device, and had better increase the air quantity that a circulating fan guarantees to reclaim circulation, make the air quantity adjustment of two kinds of circulations flexibly independent more.
8, the bigger equipment of organic solvent use amount, as coating machine, dried answer a pager's call etc., its drying plant is more complicated huge, is formed by a plurality of unit combination usually, reduce the oven dry energy consumption for strengthening drying effect, the oven dry air-flow should--high temperature--low temperature and oven dry circulation--reclaims the circulation route design by preheating.
A kind of oven dry reclaimer perfect in addition on utility model content 1 basis is provided, and described hot-air seasoning device is made up of three drying units identical or inequality at least:
One of them its part of drying unit A comprises baking oven, blower fan, backwind tube and exhaust duct, exhaust duct is connected between the exhaust outlet and condensation retracting device gas access of baking oven, the air inlet of blower fan is connected to exhaust duct by backwind tube, the exhaust outlet of blower fan directly or be connected to the air inlet of baking oven by airduct, exhaust duct, backwind tube contain air door or do not contain air door, ribbon enters the hot-air seasoning device from this drying unit, this drying unit is implemented low temperature step to drying circulation step, and gas purges in the drying unit inner loop;
Wherein have at least its part of another drying unit B to comprise baking oven, blower fan, heater, backwind tube, backwind tube is connected between baking oven exhaust outlet and the air inlet, the exhaust outlet of blower fan directly or by airduct links to each other with the air inlet of heater, the air outlet of heater directly or by airduct links to each other with the air inlet of baking oven, the gas of discharging from this unit baking oven flows back to this unit baking oven through backwind tube, blower fan, heater circulation, this drying unit is implemented high-temperature step to drying circulation step, and gas is at drying unit inner loop heating and blowing;
Wherein also have its part of drying unit F to comprise baking oven, blower fan, backwind tube and blast pipe, it is characterized in that: backwind tube is connected between the exhaust outlet and blast pipe of baking oven, condensation retracting device gas vent is connected to the air inlet of blower fan by blast pipe, the exhaust outlet of blower fan directly or be connected to the air inlet of baking oven by airduct, blast pipe, backwind tube contain air door or do not contain air door, ribbon leaves the hot-air seasoning device from this drying unit, this drying unit is implemented preheating step to drying circulation step, and gas purges in the drying unit inner loop.
Under circulating fan promotes in the condensation retracting device, gas in the hot-air seasoning device flows by the contrary ribbon direct of travel of ribbon path of travel between the baking oven unit, enter the condensation retracting device after flowing out the hot-air seasoning device, the hot-air seasoning device is got back in recirculation, implements to reclaim circulation step.
9, the bigger equipment of organic solvent use amount, as coating machine, dried answer a pager's call etc., its drying plant is more complicated huge, is formed by a plurality of unit combination usually, reduce the oven dry energy consumption for strengthening drying effect, the oven dry air-flow should--high temperature--low temperature and oven dry circulation--reclaims the circulation route design by preheating.
A kind of oven dry reclaimer perfect in addition on utility model content 1 basis is provided, and described hot-air seasoning device is made up of three drying units identical or inequality at least:
One of them its part of drying unit A comprises baking oven, blower fan, backwind tube, blast pipe and exhaust duct, exhaust duct is connected between the exhaust outlet and condensation retracting device gas access of baking oven, the air inlet of blower fan is connected to the exhaust duct of another adjacent drying unit by blast pipe, backwind tube is connected between exhaust duct and the blast pipe, the exhaust outlet of blower fan directly or be connected to the air inlet of baking oven by airduct, blast pipe, exhaust duct, backwind tube contains air door or does not contain air door, ribbon enters the hot-air seasoning device from this drying unit, this drying unit is implemented low temperature step to drying circulation step, and gas purges in the drying unit inner loop;
Wherein have at least its part of another drying unit E to comprise baking oven, blower fan, blast pipe, backwind tube and exhaust duct, the exhaust outlet of baking oven is connected to the blast pipe of adjacent drying unit by exhaust duct, the air inlet of blower fan is connected to the exhaust duct of another adjacent drying unit by blast pipe, backwind tube is connected between exhaust duct and the blast pipe, the exhaust outlet of blower fan directly or by airduct is connected to the air inlet of baking oven, and blast pipe, exhaust duct, backwind tube contain air door or do not contain air door;
Wherein also have its part of drying unit F to comprise baking oven, blower fan, backwind tube, exhaust duct and blast pipe, the exhaust outlet of baking oven is connected to the blast pipe of adjacent drying unit by exhaust duct, the air inlet of blower fan is connected to condensation retracting device gas vent by blast pipe, backwind tube is connected between exhaust duct and the blast pipe, the exhaust outlet of blower fan directly or be connected to the air inlet of baking oven by airduct, blast pipe, exhaust duct, backwind tube contains air door or does not contain air door, ribbon leaves the hot-air seasoning device from this drying unit, this drying unit is implemented preheating step to drying circulation step, and gas purges in the drying unit inner loop.
Under circulating fan promotes in the condensation retracting device, gas in the hot-air seasoning device flows by the contrary ribbon direct of travel of air inlet pipe, blast pipe that links to each other between the baking oven unit, enter the condensation retracting device after flowing out the hot-air seasoning device, the hot-air seasoning device is got back in recirculation, implements to reclaim circulation step.
The utility model both can be used for transforming existing equipment, also can be used in the designing and manufacturing of new equipment; Both can be used for single production equipment, also can be used in the production line of many plurality of devices mixing.Can realize the purpose of energy-saving and emission-reduction, safety and environmental protection.
[description of drawings]
Fig. 1 is traditional monomer-type drying plant schematic diagram.
Fig. 2 is the box-like drying plant schematic diagram of traditional group.
Fig. 3 is a principle schematic of the present utility model.
Fig. 4 is the structural representation of ribbon access road.
Fig. 5 is the structural representation of ribbon access road inlet.
Fig. 6 is the structural representation of condensation retracting device.
Fig. 7 is the structural representation of the utility model first embodiment.
Fig. 8 is the structural representation of the utility model second embodiment.
Fig. 9 is the structural representation of the utility model the 3rd embodiment.
Among the figure: the 00--ribbon,
10--hot-air seasoning device, A, B, C, D, each drying unit numbering of E, F--
101--hot-air seasoning device air inlet, 102--hot-air seasoning device exhaust outlet
103--ribbon access road, the outlet of 104--ribbon
11--baking oven 111--baking oven gas access
112--baking oven gas vent 12--heater
13--blower fan 14--blast pipe
15--inlet air door 16--backwind tube
17--return air air door 18--exhaust duct
19--air draft blower fan 20--condensation retracting device
201--condensation retracting device gas access 202--condensation retracting device gas vent
21--condenser 22--heat exchanger
23--circulating fan 24--reservoir
25--refrigeration machine 30--gas shield device
301--circulation canal inlet 303--ribbon admission passage inlet
31--source of the gas 32--circulation canal inlet air valve
33--ribbon admission passage inlet air valve 34--loop control air door
35--oxygen content sensor
[specific embodiment]
Below in conjunction with drawings and Examples the utility model is described in further detail.
Embodiment 1
Referring to Fig. 7, the oven dry reclaimer is used for supporting 8 look intaglio press in the present embodiment, and an oven dry reclaimer is joined in each look printing separately, and 8 oven dry reclaimers are identical.This oven dry reclaimer is made up of hot-air seasoning device 10, condensation retracting device 20, gas shield device 30.
As described in the novel content 7 of practicality, hot-air seasoning device 10 is a kind of monomer baking oven forms of taking back wind, and the printing machine drying plant belongs to this type typical case mostly.Come the gas of autocondensation retracting device 20 to enter blast pipe 14 through hot-air seasoning device air inlet 101, after entering blower fan 13 pressurizations, heater via 12 heating are after baking oven gas access 111 enters baking oven 11 again, gas after pressurized, heated gas nozzle in baking oven 11 is ejected into ribbon 00 surface, the organic vapor that produces mixes the back and is sucked and be pooled to baking oven gas vent 112 by air entry in the baking oven 11 with gas, part enters into condensation retracting device 20 through exhaust duct 18, finish the recovery circulation step, other portion gas then directly enters into blast pipe 14 through backwind tube 16 and loops back baking oven 11 in the exhaust duct 18, finishes the oven dry circulation step.
Hot-air seasoning device exhaust outlet 102 is discharged gas and is entered into condensation retracting device 20 through condensation retracting device gas access 201, and heat exchanger 22 is the fin heat pipe heat exchanger, and heat transfer temperature difference is 10 ℃.The cooling passage that 60 ℃ of gas enters heat exchanger 22 cools to 0 ℃, enters condenser 21 again.Condenser 21 is the copper tube and fin heat exchanger, the cold that utilizes refrigeration machine 25 to provide continues to cool to-10 ℃ to gas, the part organic vapor is recovered in the reservoir 24 after being condensed into liquid, organic vapor concentration drops to 1.67% (vol) from 3.8% (vol), remaining gas leaves the heat exchange intensification passage that condenser 21 enters heat exchanger 22 and is warmed up to 50 ℃ by-10 ℃, and the gas that has reclaimed most of heat leaves condensation retracting device 20 through condensation retracting device gas vent 202 and gets back to hot-air seasoning device 10.
Nitrogen by the road, circulation canal inlet air valve 32 enters circulation canal by the circulation canal inlet 301 that is installed on the exhaust duct 18, the gas that mixes in the circulation canal is discharged by ribbon access road as described in the novel content 9 of practicality 103 simultaneously, ribbon access road 103 internal height are 6mm, and passage length is 120mm.As described in the novel content 11 of practicality, the oxygen content sensors 35 that are installed in the baking oven 11 provide the oxygen content detected value, and circulation canal inlet air valve 32 adopts proportioning valves, can change the flow that nitrogen injects, and in service on average to inject flow with reference to nitrogen be 6m
3/ h, exhaust flow velocity 0.2m/s in the ribbon access road 103.
Before equipment brings into operation; close loop control air door 34 earlier; ON cycle passage inlet air valve 32 static nitrogen injections; rely on nitrogen pressure to discharge the interior most of residual gas of circulation canal; treat that oxygen content drops to setting value 5% (vol) and opens the 34 startup circulations of loop control air door again; implement dynamically to inject, can reduce the initial stage consumption of protective gas like this.
The source of the gas 31 of gas shield device 30 is a nitrogen making machine, gas production 60m
3/ h, purity 99% (vol), band 2m
3High pressure tank, supply gas pressure can be 8 oven dry reclaimer air feed greater than 0.4Mpa simultaneously.
All parts are by the unified control of central controller of printing machine, and all the sensors all links to each other with central controller.
The operation reference data: the recovery air circulation is 350m
3/ h, the oven dry air circulation is 2200m
3/ h, maximum organic vapor concentration 3.8%, 80 ℃ of baking oven gas access 111 temperature, 60 ℃ of baking oven gas vent 112 temperature.
In the present embodiment, oven dry circulation and recovery circulation are leaned on blower fan 13 and inlet air door 15 to cooperatively interact with return air air door 17 and are finished, and do not use independent circulating fan.
The above is one of in 8 supporting oven dry reclaimers of printing machine, and designing maximum solvent oven dry amount is 5g/s.
Embodiment 2
Referring to Fig. 8, the oven dry reclaimer is used for supporting coating machine in the present embodiment, and the maximum oven dry amount of coating machine organic solvent is 25g/s, and used organic solvent is based on toluene.This oven dry reclaimer is made up of hot-air seasoning device 10, condensation retracting device 20, gas shield device 30.
As described in the novel content 8 of practicality, hot-air seasoning device 10 is made up of six drying units of A-F, wherein drying unit A is by baking oven 11, blower fan 13, backwind tube 16 and exhaust duct 18 are formed, exhaust duct 18 is connected between the exhaust outlet and condensation retracting device gas access 201 of baking oven, the air inlet of blower fan 13 is connected to exhaust duct 18 by backwind tube, the exhaust outlet of blower fan 13 is directly connected to the air inlet of baking oven 11, loop control air door 34 is housed in the exhaust duct, ribbon 00 enters hot-air seasoning device 10 from ribbon access road 103, drying unit A implements low temperature step to drying circulation step, and gas purges in the drying unit inner loop.
Drying unit B-E is made up of baking oven 11, blower fan 13, heater 12, backwind tube 16, backwind tube is connected between baking oven exhaust outlet and the air inlet, the exhaust outlet of blower fan directly links to each other with the air inlet of heater 12, the air outlet of heater 12 directly links to each other with the air inlet of baking oven 11, the gas that each unit baking oven is discharged flows back to baking oven separately through backwind tube, blower fan, heater circulation, implement high-temperature step to drying circulation step, gas is at drying unit inner loop heating and blowing.
Drying unit F is made up of baking oven 11, blower fan 13, backwind tube 16 and blast pipe 14, backwind tube is connected between the exhaust outlet and blast pipe 14 of baking oven, condensation retracting device gas vent 202 is connected to the air inlet of blower fan 13 by blast pipe, the exhaust outlet of blower fan 13 is directly connected to the air inlet of baking oven 11, ribbon 00 leaves hot-air seasoning device 10 from the ribbon outlet 104 of drying unit F, drying unit F implements preheating step to drying circulation step, gas purges in drying unit F inner loop, by heating up with ribbon 00 heat exchange.
Condensation retracting device 20 as shown in Figure 6, refrigeration machine 25 is an air-cooled refrigerator of kx-201A in the condensation retracting device 20, has the refrigerating capacity of 30kw for-15 ℃ the time in evaporating temperature.By electromagnetic expanding valve shunting, can be simultaneously provide cold for the oven dry reclaimer of many coating machines.Condenser 21 is the copper tube and fin heat exchanger, and condensation temperature is-10 ℃; Heat exchanger is the heat pipe fin heat exchanger, and heat transfer temperature difference is 10 ℃; The condensation removal process is identical with embodiment 1.
Under circulating fan 23 promoted, the gas in the hot-air seasoning device 10 flowed by the contrary ribbon direct of travel of ribbon path of travel between the baking oven unit, promptly flows to the E unit from the F unit, moves ahead successively, until flowing to the A unit.Gas enters condensation retracting device 20 after flowing out hot-air seasoning device 10 from the A unit, and hot-air seasoning device 10 is got back in recirculation, orders about gas and circulates between baking step and recycling step.
The source of the gas 31 of gas shield device 30 is a nitrogen making machine, gas production 60m
3/ h, purity 99% (vol), band 2m
3High pressure tank, supply gas pressure can be the oven dry reclaimer air feed of many coating machines greater than 0.4Mpa simultaneously.
As described in the novel content 3 of practicality, the inlet of two protective gas is arranged in the present embodiment, circulation canal inlet 301 is installed in the exhaust duct 18 to link to each other with circulation canal and communicates, and it injects air-flow by 32 controls of circulation canal inlet air valve.Ribbon 00 enters ribbon admission passage inlet 303 and is installed in the ribbon access road 103, constitutes the vent line of the threeway of connection circulation canal, external environment condition and a gas shield device, and it injects air-flow and is subjected to air valve 33 controls.
Before equipment brings into operation; close loop control air door 34, ribbon admission passage inlet air valve 33 earlier; the ON cycle passage inlet air valve 32 static protective gas that inject; rely on protective gas pressure to discharge the interior most of residual gas of circulation canal; treat that oxygen content drops to 5% (vol) and opens loop control air door 34, ribbon admission passage inlet air valve 33 again; start each blower fan and begin gas circulation, implement dynamically to inject.Ribbon admission passage inlet 303 in service is by about 6m
3/ h flow injects constantly, and circulation canal inlet air valve 32 is controlled as follows: 1, detect step: checkout equipment inner space gas oxygen content; 2, alarming step: when the oxygen content detected value was higher than the upper safety limit value, maximum stream flow was injected protective gas to circulation canal, and output alarm signal forbids that ribbon advances; 3, implantation step: the oxygen content detected value is higher than to be adjusted higher limit but when being lower than the upper safety limit value, starting to circulation canal and inject protective gas;
4, keep step: the oxygen content detected value is lower than when adjusting lower limit, stops to inject protective gas to circulation canal.The upper safety limit value is 8% (vol), is limited to 5% (vol) in the adjustment, is limited to 2% (vol) under adjusting.Injection flow when circulation canal inlet 301 is opened is about 60m
3/ h can reduce the oxygen content of device interior apace.
Reference data: the recovery air circulation is 1800m
3/ h, each unit oven dry air circulation is 3000m
3/ h, each drying unit gas temperature and organic vapor concentration reference value are as follows:
F：70℃ 1.7％(vol)
E：180℃ 1.7％(vol)
D：160℃ 2.0％(vol)
C：130℃ 2.6％(vol)
B：90℃ 3.2％(vol)
A：60℃ 3.8％(vol)
Embodiment 3
Referring to Fig. 9, present embodiment has adopted as the novel content 9 described hot-air seasoning devices 10 of practicality, difference from Example 2 is that the air inlet pipe 14 ', exhaust duct 18 ' the contrary ribbon direct of travel that link to each other between air communication overbaking box unit between each drying unit flow, rather than embodiment 2 is described only depends on that the ribbon path of travel flows between the baking oven unit.The muffler 16 ' and the blast pipe 14 ' of each unit have all been installed air door, can adjust throughput neatly.
The oven dry recovery that the utility model is applicable to organic solvent, realize by following steps:
Protection step: inject protective gas to oven dry reclaimer inner space, order about the gas that the inner space mixes and discharge, make that oxygen content is lower than 16% (vol) in the gas of inner space;
Baking step: order about through heating or the ribbon of not advancing continuously through the gas purging of heating, to impel the organic solvent evaporation that is distributed on the ribbon be organic vapor and be mixed in the gas;
Recycling step: will mix the gas cooled of organic vapor, and reduce the saturated concentration of organic vapor, will surpass and reclaim after saturated concentration organic vapor partly be condensed into liquid;
Circulation step: order about gas and between baking step and recycling step, circulate.
Claims (9)
1. the oven dry reclaimer of an organic solvent, comprise hot-air seasoning device (10), condensation retracting device (20) and gas shield device (30), it is characterized in that: hot-air seasoning device air inlet (101) is connected to condensation retracting device gas vent (202), hot-air seasoning device exhaust outlet (102) is connected to condensation retracting device gas access (201), the inner space of hot-air seasoning device and condensation retracting device forms gas circulation channel, and ribbon (00) enters the ribbon access road (103) of hot-air seasoning device as the gas channel between circulation canal and the external environment condition; Gas shield device is provided with circulation canal inlet (301) and links to each other with circulation canal.
2. according to the oven dry reclaimer of the described organic solvent of claim 1, it is characterized in that: described ribbon access road (103) is a contour or not contour narrow-gap channel, the ribbon access road is along greater than the minimum slit internal height of channel interior H 6 times of the length L of ribbon direct of travel, i.e. L/H＞6.
3. according to the oven dry reclaimer of the described organic solvent of claim 2; it is characterized in that: described gas shield device (30) also is provided with ribbon admission passage inlet (303) and communicates with described ribbon access road (103), and the protective gas that injects by ribbon admission passage inlet (303) forms the gas curtain that intercepts the inside and outside gas communication in ribbon access road (103).
4. according to the oven dry reclaimer of the described organic solvent of claim 1; it is characterized in that also being provided with oxygen content sensor (35) and air valve; the probe of oxygen sensor is installed in the circulation canal; air valve is connected between gas shield device source of the gas and the inlet by tracheae, is used to control the flow that injects the circulation canal protective gas.
5. according to the oven dry reclaimer of the described organic solvent of claim 1, it is characterized in that: described condensation retracting device (20) comprises heat exchanger (22) and condenser (21), heat exchanger has two-way to isolate mutually but the gas channel of heat exchange mutually, one the tunnel as the cooling passage, and another road is as the intensification passage; Heat exchanger cooling channel outlet links to each other with the condenser gas access, and heat exchanger intensification feeder connection links to each other with the condenser gas vent, and it is preceding and pass through gas heat exchange in heat exchanger behind the condenser to enter condenser.
6. according to the oven dry reclaimer of the described organic solvent of claim 5, it is characterized in that: described condensation retracting device (20) also comprises a circulating fan (23), the air outlet of circulating fan links to each other with heat exchanger (22) cooling feeder connection, sends into heat exchanger after the gas pressurized in the circulating fan extraction hot-air seasoning device.
7. according to the oven dry reclaimer of the described organic solvent of claim 1, it is characterized in that: described hot-air seasoning device comprises baking oven (11), exhaust duct (18), blast pipe (14), backwind tube (16), blower fan (13) and heater (12), the exhaust outlet of baking oven is connected to condensation retracting device gas access (201) by exhaust duct, condensation retracting device gas vent (202) is connected to the air inlet of blower fan by blast pipe, backwind tube is connected between exhaust duct and the blast pipe, the exhaust outlet of blower fan directly or be connected to the air inlet of heater by airduct, the air outlet of heater directly or by airduct is connected to the air inlet of baking oven, exhaust duct, blast pipe, backwind tube contains air door or does not contain air door.
8. according to the oven dry reclaimer of the described organic solvent of claim 1, it is characterized in that: described hot-air seasoning device (10) is made up of three drying units identical or inequality at least,
Its part of one of them drying unit (A) comprises baking oven (11) and exhaust duct (18) at least, and exhaust duct is connected between the exhaust outlet and condensation retracting device gas access (201) of baking oven, and ribbon (00) enters the hot-air seasoning device from this drying unit;
Wherein have at least its part of another drying unit (B) to comprise baking oven (11), blower fan (13), heater (12), backwind tube (16), backwind tube is connected between baking oven exhaust outlet and the air inlet, the exhaust outlet of blower fan directly or by airduct links to each other with the air inlet of heater, the air outlet of heater directly or by airduct links to each other with the air inlet of baking oven, and the gas of discharging from this unit baking oven flows back to this unit baking oven through backwind tube, blower fan, heater circulation;
Wherein also have its part of a drying unit (F) to comprise baking oven (11), blower fan (13) and blast pipe (14) at least, condensation retracting device gas vent (202) is connected to the air inlet of blower fan by blast pipe, the exhaust outlet of blower fan directly or by airduct is connected to the air inlet of baking oven, and ribbon leaves the hot-air seasoning device from this drying unit.
9. according to the oven dry reclaimer of the described organic solvent of claim 1, it is characterized in that: described hot-air seasoning device is made up of three drying units identical or inequality at least,
Its part of one of them drying unit (A) comprises baking oven (11) and exhaust duct (18) at least, and exhaust duct is connected between the exhaust outlet and condensation retracting device gas access (201) of baking oven, and ribbon (00) enters the hot-air seasoning device from this drying unit;
Wherein have at least its part of another drying unit (E) to comprise baking oven (11), blower fan (13), blast pipe (14 '), backwind tube (16 ') and exhaust duct (18 '), the exhaust outlet of baking oven is connected to the blast pipe of other drying unit by exhaust duct, the air inlet of blower fan is connected to the exhaust duct of another other drying unit by blast pipe, backwind tube is connected between exhaust duct and the blast pipe, the exhaust outlet of blower fan directly or by airduct is connected to the air inlet of baking oven, and blast pipe, exhaust duct, backwind tube contain air door or do not contain air door;
Wherein also have its part of a drying unit (F) to comprise baking oven (11), blower fan (13) and blast pipe (14) at least, condensation retracting device gas vent (202) is connected to the air inlet of blower fan by blast pipe, the exhaust outlet of blower fan directly or by airduct is connected to the air inlet of baking oven, and ribbon (00) leaves the hot-air seasoning device from this drying unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200564297U CN201534003U (en) | 2009-05-12 | 2009-05-12 | Organic solvent drying recovering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200564297U CN201534003U (en) | 2009-05-12 | 2009-05-12 | Organic solvent drying recovering equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201534003U true CN201534003U (en) | 2010-07-28 |
Family
ID=42533789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200564297U Expired - Lifetime CN201534003U (en) | 2009-05-12 | 2009-05-12 | Organic solvent drying recovering equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201534003U (en) |
-
2009
- 2009-05-12 CN CN2009200564297U patent/CN201534003U/en not_active Expired - Lifetime
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| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: YU ZHIJUN Effective date: 20150630 Owner name: GUANGDONG VERBOCA ENERGY-SAVING TECHNOLOGIES CO., Free format text: FORMER OWNER: JIAN Effective date: 20150630 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150630 Address after: No. 7 forewin International Industrial Park, 528300 Guangdong city of Foshan province Shunde Daliang district road five sand Xinkai a plant a layer of 102 units Patentee after: VERBOCA ENERGY-SAVING TECHNOLOGIES CO., LTD. Address before: 528300, Foshan District, Guangdong City, Shunde province Ronggui Street Zhenhua Road, Fu Garden, Xia Xia Pavilion No. 603 Patentee before: Jian Su Patentee before: Yu Zhijun |
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| CX01 | Expiry of patent term | ||
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Granted publication date: 20100728 |