Afterheat energy-saving automatic humidification drying line
Technical field
The present invention relates to product drying technology, specifically, relate to a kind of humidification drying line for paper products shaping.
Background technology
In paper products forming process, after mould molding, because of shaped article moisture content higher, need to dry it, the drying mode of extensive use is at present tunnel type drying, tunnel type drying passage is set in baking zone, and the Transmission that needs are dried, to as in tunnel type drying passage, utilizes the needed high temperature of product in tunnel type drying passage that the moisture in product is evaporated.After below heat rises in this drying mode baking zone and be underutilized, and just utilized heat below tunnel, the shortcoming that exists energy to be not fully utilized, does not meet the general policy of national development recycling economy, energy-saving and emission-reduction.In addition, paper products after oven dry, park and after at least 24 hours, carry out shaping, in south, because air ratio is moister, paper products after oven dry absorbs the moisture in portion of air after parking, after shaping process in drawing crack, damaged, irregular situation is fewer, product percent of pass is relatively higher, but in the north, air ratio is drier, although the paper products after oven dry is through parking the moisture absorbing in portion of air, the moisture absorbing is fewer, after shaping process in drawing crack, damaged, irregular situation is many, product percent of pass is lower.As can be seen here, paper products is in whole production process, paper products after oven dry need at least be parked 24 hours, production time is long, inefficiency, and easily drawing crack, breakage, out-of-flatness in shaping process, poor product quality, qualification rate are low, to drawing crack, breakage, irregular paper products, need to melt down processing again, wasting manpower and material resources.
Summary of the invention
The object of the invention is to the problems referred to above that exist in existing paper products process, a kind of afterheat energy-saving automatic humidification drying line is provided, this automatic humidification drying line can make full use of the heat that heat exchanger distributes, assurance energy can not wasted, and product is directly introduced automatic humidification district after drying simultaneously, by automatic humidification district, it is carried out to humidification, guarantee that product humidification comprehensively simultaneously uniformly, reduce the humidification time, resource utilization is high, has improved operating efficiency.
Technical scheme of the present invention is: a kind of afterheat energy-saving automatic humidification drying line, this humidification drying line comprises baking zone and is arranged on the automatic humidification district in baking zone exit, baking zone is divided into, lower two-layer, in upper strata baking zone and lower floor's baking zone, be provided with a product pipeline, and the product pipeline in the baking zone of upper strata is connected with the product pipeline of lower floor's baking zone, in lower floor's baking zone, be provided with drying channel, product pipeline in lower floor's baking zone is positioned at drying channel, in drying channel, be provided with a plurality of heat exchangers, heat exchanger is positioned at the top of product pipeline.
Preferably, the product pipeline in the baking zone of described upper strata is connected by a drive unit with the product pipeline in lower floor baking zone.
Further, automatic humidification district comprises and adds wet channel and be arranged on the control system that adds wet channel outside, add and in wet channel, be provided with product pipeline, feed pipe and compressed air hose, adding product pipeline in wet channel is connected with the product pipeline in lower floor baking zone, the both sides that add product pipeline in wet channel are provided with a plurality of biphase gas and liquid flow shower nozzles, one of biphase gas and liquid flow shower nozzle is connected with feed pipe, and another is connected with compressed air hose.
Preferably, control system comprises with the humidity controller of single-chip microcomputer and the water supply electromagnetic valve being connected with humidity controller respectively, gas supply electromagnetic valve and humidity sensor, water supply electromagnetic valve is arranged on the water inlet of feed pipe, gas supply electromagnetic valve is arranged on compressed air hose air inlet place, and humidity sensor is arranged on and adds in wet channel.
Preferably, biphase gas and liquid flow shower nozzle is provided with 200, and every 10 biphase gas and liquid flow shower nozzles are one group, staggered within adding wet channel the both sides of product pipeline.
Preferably, biphase gas and liquid flow shower nozzle is provided with 180, and every 10 biphase gas and liquid flow shower nozzles are one group, staggered within adding wet channel the both sides of product pipeline.
Preferably, biphase gas and liquid flow shower nozzle is provided with 220, and every 10 biphase gas and liquid flow shower nozzles are one group, staggered within adding wet channel the both sides of product pipeline.
Further, feed pipe is by the pressurized tank of outside supply channel connecting band air bag, and this pressurized tank connects high-pressure hydraulic pump, and between pressurized tank and high-pressure hydraulic pump, is connected with the constant-voltage controller of controlling hydraulic balance.
Further, compressed air hose connects air compressor by outside supply air line.
Preferably, adding wet channel is comprised of glass epoxy and aluminum alloy frame.
The invention has the beneficial effects as follows: the present invention adopts the mode of drying humidification, guaranteed that follow-up paper products shaping is convenient, effectively reduced paper finished product and occurred drawing crack, breakage, irregular situation, improved product quality and operating efficiency, energy utilization rate is high, has saved manpower and materials.Baking zone of the present invention is divided into two-layer, drying channel is positioned at lower floor's baking zone, in the baking zone of upper strata, be distributed with the waste heat of drying channel, paper products is first dried in advance through upper strata baking zone, can evaporate 10% moisture, then through the drying channel in lower floor baking zone, normally dry again, guarantee that the energy that heater distributes is fully used, heat utilization rate is high, for major contribution is made in energy-saving and emission-reduction.The present invention has also increased automatic humidification district, guarantee that product humidification is comprehensively even, water utilization rate is high, after paper products drying, directly enter automatic humidification district, reduced the humidification time, and can automatically regulate humidity, humidification product does not need to adopt placement mode a collection of, that humidification is a collection of to carry out, and only need to through just guaranteeing, get damp again in inside, humidification district.
Accompanying drawing explanation
The plan structure figure that accompanying drawing 1 is the specific embodiment of the invention.
Accompanying drawing 2 is the fundamental diagram in specific embodiment of the invention automatic humidification district.
Wherein, 1, baking zone, 2, the product pipeline in the baking zone of upper strata, 3, the product pipeline in lower floor's baking zone, 4, drive unit, 5, add wet channel, 6, add the product pipeline in wet channel.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment 1: as shown in Fig. 1 to 2, a kind of afterheat energy-saving automatic humidification drying line, this humidification drying line comprises baking zone 1 and is arranged on the automatic humidification district in baking zone exit, baking zone is divided into, lower two-layer, in upper strata baking zone and lower floor's baking zone, be provided with a product pipeline, and the product pipeline 2 in the baking zone of upper strata is connected with the product pipeline 3 of lower floor's baking zone, in lower floor's baking zone, be provided with drying channel, product pipeline 3 in lower floor's baking zone is positioned at drying channel, in drying channel, be provided with a plurality of heat exchangers, heat exchanger is positioned at the top of product pipeline 3.
Product pipeline 2 in the baking zone of described upper strata is connected by a drive unit 4 with the product pipeline 3 in lower floor baking zone, for the conversion of the product pipeline 2 in the baking zone of upper strata and the product pipeline 3 in lower floor's baking zone, become the pipeline of a perforation.
In order to realize the humidification moisture regain of paper products, above-mentioned automatic humidification district comprises and adds wet channel 5 and be arranged on the control system that adds wet channel 5 outsides, add and in wet channel 5, be provided with product pipeline 6, feed pipe and compressed air hose, adding product pipeline 6 in wet channel is connected with the product pipeline 3 in lower floor baking zone, the both sides that add product pipeline 5 in wet channel are provided with a plurality of biphase gas and liquid flow shower nozzles, one of biphase gas and liquid flow shower nozzle is connected with feed pipe, and another is connected with compressed air hose.
Above-mentioned control system comprises with the humidity controller of single-chip microcomputer and the water supply electromagnetic valve being connected with humidity controller respectively, gas supply electromagnetic valve and humidity sensor, water supply electromagnetic valve is arranged on the water inlet of feed pipe, gas supply electromagnetic valve is arranged on compressed air hose air inlet place, and humidity sensor is arranged on and adds in wet channel.According to different paper products, can regulate inflow and air inflow by humidity controller, simultaneously can be according to the humidity value of humidity sensor measuring, with the humidity value comparison of setting, by humidistat, utilize magnetic valve to regulate inflow and air inflow, realize the Automatic Control to paper products resurgence process.
Feed pipe is by the pressurized tank of outside supply channel connecting band air bag, and this pressurized tank connects high-pressure hydraulic pump, and between pressurized tank and high-pressure hydraulic pump, is connected with the constant-voltage controller of controlling hydraulic balance, for feed pipe provides stable high-pressure water.
Compressed air hose connects air compressor by outside supply air line, and air compressor provides stable source of the gas for compressed air hose.
The above-mentioned wet channel that adds is comprised of glass epoxy and aluminum alloy frame.
In the present embodiment, biphase gas and liquid flow shower nozzle is provided with 200, and every 10 biphase gas and liquid flow shower nozzles are one group, staggered within adding wet channel the both sides of product pipeline,, make the moisture regain of paper products humidification more even.
Operation principle: the paper products of moulding, first through upper strata baking zone, utilizes the remaining temperature in the baking zone of upper strata to dry in advance paper products, can evaporate 10% moisture in the baking zone of upper strata, then through the paper products of drying in advance, through drive unit, go to lower floor's baking zone, enter drying channel and normally dry, convenient for guaranteeing paper products shaping, shaping effect is good, paper products after drying need to get damp again, now, paper products after drying completes directly enters automatic humidification district, by air compressor, provide stable compressed air gas source, for biphase gas and liquid flow shower nozzle provides the compressed air of 0.3-0.4MPa, by high-pressure hydraulic pump, provide stable high-pressure water, for biphase gas and liquid flow shower nozzle provides the water under high pressure of 0.3-0.6MPa, according to different paper products, adjust inflow and air inflow, by compressed-air actuated mode, make gas-liquid mixed form paper products get damp again needed fog and humidity, make moisture obtain sufficient materialization, through staggered biphase gas and liquid flow shower nozzle, evenly spray on paper products at the volley, complete the humidification moisture regain to paper products, and by humidity sensor, detect the humidity adding in wet channel, with the humidity value comparison of setting, according to the needs of paper products, humidity controller utilizes water supply electromagnetic valve and gas supply electromagnetic valve automatically to control inflow and air inflow, the humidity that makes to add in wet channel is moderate, realize the Automatic Control of product moisture regain.
Embodiment 2: as different from Example 1, in embodiment 2, biphase gas and liquid flow shower nozzle is provided with 180, and every 10 biphase gas and liquid flow shower nozzles are one group, staggered within adding wet channel the both sides of product pipeline.
Operation principle is with embodiment 1.
Embodiment 3: as different from Example 1, in embodiment 3, biphase gas and liquid flow shower nozzle is provided with 220, and every 10 biphase gas and liquid flow shower nozzles are one group, staggered within adding wet channel the both sides of product pipeline.
Operation principle is with embodiment 1.