A kind of oven drying system using organic exhaust gas combustion heating【Technical field】
It the utility model is related to printing or coating industry, and in particular to a kind of baking oven using organic exhaust gas combustion heating is doneDrying system.
【Background technology】
Oven drying is an important process procedure in printing, coating apparatus, it is therefore an objective to by the paste containing solvent or waterShape slurry is dried, curing molding.
The mode of heating of existing baking oven mainly has：Electrical heating, heating medium for heating, infrared heating and air heating.Electrical heatingIt is a kind of most common simple and convenient method, is used for medium-sized and small enterprises very extensive.Infrared heating is to utilize electromagnetismRadiant heat transfer principle, conduct heat in direct mode and reach the purpose of drying objects, so as to avoid energy caused by heating medium bodyLoss.Heating medium for heating is that high temperature heat conductive oil is by oil pump through pipeline to the row in smart painting machine by heating heating agent (conduction oil)Tubing heat exchanger, heat is supplied to fresh cold air, it is become hot blast, for dry products；But in whole processIn, because the multiple medium conversion efficiency limitation intrinsic with heat exchanger, the heat loss of whole heat transfer process are larger.Air addsHeat applies in general to large enterprise, is configured with boiler room, by burning fuel (such as：Coal) a large amount of high-temperature steams of release enter to equipmentRow heating.
In an oven, due to solvent-borne type slurry, solvent volatilization produces a large amount of organic exhaust gas in drying course, if directlyDischarge can cause atmosphere pollution.It is by heat accumulating type heating power incinerator (RTO), at high temperature by waste gas by the way of at presentOrganic matter (VOCs) be oxidized to corresponding to carbon dioxide and water, so as to purify waste gas, and reclaim when waste gas decomposes and dischargedThe heat come, can be as the supplement heated to boiler, the heating of supply arrangement baking oven by brethaid.
But a set of boiler room floor space is big, general factory and enterprise can not configure.And need the energy such as a large amount of coals that burnSource could produce heat, first, energy minerals are increasingly reduced, second, coal burning produces a large amount of dust particle, form haze, makeInto serious environmental pollution, there is serious influence to social safety, health of human body.
Therefore, for problem above, there is an urgent need to a kind of economic and environment-friendly mode of heating, to meet all kinds of large, medium and small worksThe demand of factory.
【Utility model content】
The utility model is provided a kind of burnt using organic exhaust gas and baking oven is heated, and is accurately controlled using TIC, warp can be achievedThe oven drying system of Ji, environmental protection and high-efficiency heating mode.
In order to realize foregoing invention purpose, the technical solution adopted in the utility model is：
A kind of oven drying system using organic exhaust gas combustion heating, including body, body baking oven, control centre and heatPower incinerator, the body be printing machine or and coating machine, the printing machine or and coating machine body oven for drying work whenProduce organic exhaust gas, be provided with the body baking oven to printing machine or and coating machine drying work caused by organic exhaust gas enterThe recovery branch road of row recovery；The body baking oven is externally provided with blasts heat by the organic exhaust gas for reclaiming branch road collection by exhaust pipeThe exhaust gas fan of combustion chamber in power incinerator；The air inlet of combustion chamber is additionally provided with heating power incinerator is carried out to entering organic exhaust gasReduction of speed and preliminary preheating heat treatment prevent the heat-exchange tube for causing combustion chamber to extinguish, and combustion chamber is also associated with when having in incineratorMachine exhaust gas concentration deficiency, which can not burn, starts the natural gas nozzle of burning using natural gas；The heating power combustion chamber of incinerator dischargeHigh-temperature gas be connected with heat exchanger and the chimney being expelled directly out in turn, the built-in fresh cold wind with extraneous filtering of heat exchangerThe pipeline of connection, caused high-temperature gas inputs fresh cold wind through heat exchanger built-in pipe and carrys out indirect exchange after combustion chambers burnHigh-temperature hot-air is formed after cooling；Be additionally provided with the body baking oven to printing machine or and the product of coating machine carry out drying heatingDrying branch road, high-temperature hot-air connected by air return pipeline with each drying branch road in body baking oven.
Preferably, being additionally provided with the pipeline between the exhaust gas fan and recovery branch road is easy to the organic exhaust gas of recovery uniformThe equal bellows of waste gas of mixing.
Preferably, the equal bellows of the waste gas are provided with the organic exhaust gas course of conveying for preventing excessive concentration and sent out with duct wallPyrophoric burst disk is produced in raw friction.
Preferably, being additionally provided with the pipeline between the equal bellows of the waste gas and exhaust gas fan prevents from burning in heating power incineratorThe too high control valve of the fire box temperature of room and atmospheric valve.
Preferably, it is additionally provided between the air return pipeline and chimney of the heat exchanger discharge high-temperature hot-air in air return pipelineExcessive high-temperature hot-air bypass the bypass line and by-passing valve of discharge.
Preferably, the temperature sensor of measurement the temperature inside the box is additionally provided with the body baking oven, control centre is according to temperatureThe temperature signal of sensor adjusts the input quantity of fresh wind and high-temperature hot-air come the temperature of control input hot blast by three-way valve,Corresponding air return pipeline is provided with carries out the mixed uniformly equal bellows of hot blast by the fresh wind after regulation and high-temperature hot-air.
The beneficial effects of the utility model are：
The utility model cancels original boiler house design, saves factory floor space, saves the energy of boiler combustion consumptionSource, and the discharge of harmful exhaust is reduced, this system can recycle pernicious gas, realize that no pollution discharges, and heat effectRate is higher, and energy consumption is lower, economizes on resources, environmental protection, reduces cost.
During work, the printing machine or and coating machine body oven for drying work when produce organic exhaust gas；Body baking oven leads toCross heat energy caused by organic exhaust gas burning caused by recycling to each printing machine or and the product of coating machine dry,And accurately controlled using TIC, substitute traditional heat exchanger, first, space is greatlyd save, second, reducing the energy of heat exchangeLoss, can improve the efficiency of heating surface, realize economic, environmentally friendly, efficient drying effect.
【Brief description of the drawings】
Fig. 1 is operation principle schematic diagram of the present utility model.
【Embodiment】
A kind of oven drying system using organic exhaust gas combustion heating, as shown in figure 1, including body 1, body baking oven 2,Control centre's (not shown) and heating power incinerator 3, the body 1 be printing machine or and coating machine, printing machine or and coatingMachine body baking oven 2 produces organic exhaust gas when working；Be provided with the body baking oven 2 to printing machine or and coating machine drying workThe recovery branch road 4 that caused organic exhaust gas is reclaimed, body baking oven 2 are externally provided with the organic exhaust gas for collecting recovery branch road 4The exhaust gas fan 7 of combustion chamber 6 in heating power incinerator is blasted by exhaust pipe 5；The air inlet of combustion chamber 6 is also in heating power incineratorProvided with reduction of speed and the preliminary heat-exchange tube 8 for preheating heat treatment and preventing from causing combustion chamber to extinguish is carried out to entering organic exhaust gas, burnChange combustion chamber 6 in stove to be also associated with starting the natural gas nozzle of burning using natural gas when organic exhaust gas concentration deficiency can not burn9；The combustion chamber 6 of the heating power incinerator discharges high-temperature gas and is connected with heat exchanger 10 and the chimney 11 being expelled directly out in turn, heatThe pipeline that the built-in fresh cold wind with external world's filtering of exchanger 10 connects, caused high-temperature gas is handed over through heat after combustion chamber 6 is burntThe built-in pipe of parallel operation 10 inputs after fresh cold wind carrys out indirect exchange cooling and forms high-temperature hot-air；It is additionally provided with the body baking oven 2 pairEach printing machine or and the product of coating machine dry the drying branch road 12 of heating, high-temperature hot-air by air return pipeline 13 withEach drying branch road 12 in body baking oven 2 connects.
Wherein, continue as shown in figure 1, exhaust gas fan 7 and recovery branch road 4 between pipeline on be additionally provided be easy to recovery haveThe equal bellows 14 of the mixed uniformly waste gas of machine waste gas, the equal bellows 14 of waste gas are provided with the organic exhaust gas course of conveying for preventing excessive concentrationIn friction occur with duct wall produce pyrophoric burst disk 15；Also set on pipeline between the equal bellows 14 of waste gas and exhaust gas fan 7There are the control valve 16 for preventing the fire box temperature of combustion chamber 6 in heating power incinerator too high and atmospheric valve 17, discharged in heat exchanger 10It is additionally provided between the air return pipeline 13 and chimney 11 of high-temperature hot-air and bypass discharge is carried out to excessive high-temperature hot-air in air return pipeline 13Bypass line 18 and by-passing valve 19.
In addition, the temperature sensor (not shown) of measurement the temperature inside the box is additionally provided with body baking oven 2, control centre's (figureIn do not show) input quantity of fresh wind and high-temperature hot-air is adjusted to control by three-way valve according to the temperature signal of temperature sensorThe temperature of hot blast is inputted, corresponding air return pipeline is provided with carries out mixed uniformly heat by the fresh wind after regulation and high-temperature hot-airThe equal bellows (not shown) of wind.
During work, printing machine or and coating machine body baking oven 2 work when produce organic exhaust gas, recovered branch road 4 is delivered toThe equal bellows 14 of waste gas, it is well mixed in the equal bellows 14 of waste gas, is provided with burst disk 15 in the equal bellows 14 of waste gas, prevents from conveyingDuring organic exhaust gas rubbed with duct wall, produce spark during excessive concentration.
Organic exhaust gas after the equal bellows 14 of waste gas are well mixed is transmitted to the burning of heating power incinerator by exhaust gas fan 7Room 6, before combustion chamber 6 is entered, heat-exchange tube 8 is first passed through, input combustion chamber 6 after reducing wind speed, avoid wind-force too big, directlyAfter by the fray-out of flame in combustion chamber 6.
Natural gas nozzle 9 is provided with combustion chamber 6, when organic exhaust gas concentration deficiency can not burn, natural gas nozzle 9 willInjection natural gas carry out burning generation heat, when printing machine or and coating machine it is stable after, produce enough organic exhaust gasWhen, natural gas nozzle 9 is closed, and the organic exhaust gas that burns only is needed in combustion chamber 6, caused high-temperature gas is through heat exchange after burningDevice 10 carries out indirect exchange cooling, the i.e. built-in pipe of heat exchanger 10, and filtered fresh cold wind is inputted in pipeline, is outside pipelineHigh-temperature hot-air caused by burning, the two high-temperature hot-air formed after indirect exchange cools pass through air return pipeline 13 and body baking ovenEach drying branch road 12 in 2 connects.
Printing machine or and organic exhaust gas is produced during coating machine body 2 drying work of baking oven, body baking oven 2, which passes through, circulates profitCaused by the burning of caused organic exhaust gas heat energy to each printing machine or and the product of coating machine dry, and use TICAccurate control, substitutes traditional heat exchanger,, can be with second, reduce the energy loss of heat exchange first, greatly save spaceThe efficiency of heating surface is improved, realizes economic, environmentally friendly, efficient drying effect.
It is preferred embodiment of the present utility model that embodiment described above, which is, not limits reality of the present utility model with thisScope is applied, all equivalence changes made according to the shape of the utility model, construction and principle, guarantor of the present utility model all should be covered byIn the range of shield.