Gelatin fourdrinier wire dryer heating system
Technical field
The utility model relates to technical field of drying, particularly relates to a kind of gelatin fourdrinier wire dryer heating system.
Background technology
The oven dry of gelatin product is tunnel type (being commonly called as the fourdrinier wire dryer) airflow drying.The oven dry heat medium is a hot blast, and the heating thermal source of hot blast is high temperature, high steam.The form of utilizing of high temperature, high steam directly influences the thermal efficiency of steam.
The structural representation of existing gelatin fourdrinier wire dryer heating system as shown in Figure 1, its air heat all adopts steam once to heat, between fourdrinier wire guipure driving wheel 19 and fourdrinier wire guipure driven pulley 1, be connected with fourdrinier wire guipure 2, between fourdrinier wire guipure driving wheel 19 and the fourdrinier wire guipure driven pulley 1, in fourdrinier wire guipure 2 outer setting fourdrinier wire casing 3 is arranged, be provided with the heating steam house steward a parallel in the fourdrinier wire casing 3 with fourdrinier wire guipure 2, be provided with the condensed water house steward b parallel with heating steam house steward a in fourdrinier wire casing 3 bottoms, in fourdrinier wire casing 3, length direction along fourdrinier wire guipure 2 is provided with relative fourdrinier wire casing air register and the air heater of many groups, in 8 grades of fourdrinier wire dryer heating systems, 7 groups of relative fourdrinier wire casing air register and air heaters are set altogether, wherein fourdrinier wire casing air register and the air heater in every group is crisscross arranged, air is entered in the fourdrinier wire casing 3 by air inlet, because of every grade of desired air themperature difference of heating, so be provided with air heater since the 2nd grade of heating, the 1st grade is heated to air themperature is 25 ℃, at this moment needs to lower the temperature with frozen water; The 2nd grade of air themperature is 30 ℃, first order air heater 6 is set uses Steam Heating; The 3rd level air themperature is 35 ℃, second level air heater 7 is set uses Steam Heating; The 4th grade of air themperature is 40 ℃, third level air heater 10 is set uses Steam Heating; The 5th grade of air themperature is 45 ℃, fourth stage air heater 11 is set uses steam heated; The 6th grade of air themperature is 50 ℃, level V air heater 14 is set uses Steam Heating; The 7th grade of air themperature is 55 ℃, the 6th grade of air heater 15 is set uses Steam Heating; The 8th grade of air themperature is 60 ℃, the 7th grade of air heater 18 is set uses Steam Heating, wherein, each heater is relatively set with fourdrinier wire casing air register, be respectively the 4~seven grade of air heater 18 of first order fourdrinier wire casing air register, use fourdrinier wire casing air register that air is flowed according to the direction of setting.
In the above-mentioned fourdrinier wire dryer heating system, directly logical Steam Heating is all adopted in every grade heating, the condensed water pressure height of being discharged (〉=0.1MPa), temperature is greater than 100 ℃, heat enthalpy value wherein is not fully utilized, cause the utilization rate of heat low, the heating steam consumption is big, and xanthan consumes steam and reaches more than 8 tons.
The utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model is to improve the utilization rate of fourdrinier wire dryer heating system heating steam, to reduce the steam consumption of gelatin oven dry.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of gelatin fourdrinier wire dryer heating system, comprise: fourdrinier wire guipure driving wheel 19 that be arranged in parallel and fourdrinier wire guipure driven pulley 1, described fourdrinier wire guipure driving wheel 19 and fourdrinier wire guipure driven pulley 1 are connected by fourdrinier wire guipure 2, described fourdrinier wire guipure 2 outer cover between described fourdrinier wire guipure driving wheel 19 and the fourdrinier wire guipure driven pulley 1 are provided with fourdrinier wire casing 3, described fourdrinier wire casing 3 inside are provided with some grades of air-heating units, described some grades of air-heating units are arranged alternately both sides at described fourdrinier wire guipure 2 along the length direction of described fourdrinier wire guipure 2, described every grade of air heater unit comprises air heater, the both sides of described fourdrinier wire guipure 2 have been arranged alternately several fourdrinier wire casing air registers, described each fourdrinier wire casing air register and described each air heater are oppositely arranged, be connected with steam-water separator between per two described air heaters, several described steam-water separators are connected in series.
In the above-mentioned gelatin fourdrinier wire dryer heating system, in described several steam-water separators, the air heater of close described fourdrinier wire guipure driving wheel 19 1 ends is provided with the heating steam air inlet.
In the above-mentioned gelatin fourdrinier wire dryer heating system, in described several steam-water separators, the air heater of close described fourdrinier wire guipure driven pulley 1 one ends is provided with condensation-water drain 5a.
In the above-mentioned gelatin fourdrinier wire dryer heating system, the described fourdrinier wire casing 3 of close described fourdrinier wire guipure driven pulley 1 one ends is provided with air inlet.
In the above-mentioned gelatin fourdrinier wire dryer heating system, the described fourdrinier wire casing 3 of close described fourdrinier wire guipure driving wheel 19 1 ends is provided with exhaust outlet.
In the above-mentioned gelatin fourdrinier wire dryer heating system, described condensation-water drain 5a place is provided with condensation-water drain visor 20.
In the above-mentioned gelatin fourdrinier wire dryer heating system, described several steam-water separators are positioned at the bottom of described fourdrinier wire casing 3.
(3) beneficial effect
In the gelatin fourdrinier wire dryer heating system that technique scheme provided, change traditional fourdrinier wire air heat mode, utilized the heat enthalpy value of steam to greatest extent, reduced the consumption of steam; Stepped steam heated mode, the temperature difference is less, and condensate liquid is less, and the liquid film layer that steam and air heat-transfer surface place form is thinner, coefficient of heat transfer height, heat transfer rate is fast, and heat loss is little; This system architecture is simple, is convenient to carry out automation control.
Description of drawings
Fig. 1 is the structural representation of gelatin fourdrinier wire dryer heating system in the prior art;
Fig. 2 is the structural representation of the gelatin fourdrinier wire dryer heating system of the utility model embodiment.
Wherein, 1: fourdrinier wire guipure driven pulley; 2: the fourdrinier wire guipure; 3: the fourdrinier wire casing; 4: first order fourdrinier wire casing air register; 5: heating steam admission house steward; 5a: condensation-water drain; 6: first order air heater; 7: second level air heater; 8: second level fourdrinier wire casing air register; 9: third level fourdrinier wire casing air register; 10: third level air heater; 11: fourth stage air heater; 12: fourth stage fourdrinier wire casing air register; 13: level V fourdrinier wire casing air register; 14: the level V air heater; 15: the six grades of air heaters; 16: the six grades of fourdrinier wire casing air registers; 17: the seven grades of fourdrinier wire casing air registers; 18: the seven grades of air heaters; 19: fourdrinier wire guipure driving wheel; 20: the condensation-water drain visor; 21: first order steam-water separator; 22: second level steam-water separator; 23: third level steam-water separator; 24: fourth stage steam-water separator; 25: the level V steam-water separator; 26: the six grades of steam-water separators; A: heating steam house steward; B: condensed water house steward.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following examples are used to illustrate the utility model, but are not used for limiting scope of the present utility model.
Fig. 2 shows the structural representation of the gelatin fourdrinier wire dryer heating system of the utility model embodiment, as shown in the figure, this gelatin fourdrinier wire dryer heating system comprises: fourdrinier wire guipure driving wheel 19 that be arranged in parallel and fourdrinier wire guipure driven pulley 1, fourdrinier wire guipure driving wheel 19 and fourdrinier wire guipure driven pulley 1 are connected by fourdrinier wire guipure 2, fourdrinier wire guipure 2 outer cover between fourdrinier wire guipure driving wheel 19 and the fourdrinier wire guipure driven pulley 1 are provided with fourdrinier wire casing 3, fourdrinier wire casing 3 inside are provided with some grades of air-heating units, in the present embodiment, gelatin fourdrinier wire dryer heating system is set to 8 grades of heating systems, wherein first order heating-up temperature requires low, do not need Steam Heating, so described some grades of air-heating units comprise seven grades, seven grades of air-heating units are arranged alternately both sides at fourdrinier wire guipure 2 along the length direction of fourdrinier wire guipure 2, every grade of air heater unit comprises an air heater, the both sides of fourdrinier wire guipure 2 also have been arranged alternately seven fourdrinier wire casing air registers, each fourdrinier wire casing air register and each air heater are oppositely arranged, and seven steam-water separators are connected in series and all are arranged on the bottom of fourdrinier wire casing 3.From fourdrinier wire guipure driving wheel 19 1 ends to fourdrinier wire guipure driven pulley 1 one ends, heating unit is respectively seven grades of the first order to the, air heater should be seven grades of the first order to the mutually, steam-water separator between the air heater then is six grades of the first order to the, first order air heater 6 is provided with condensation-water drain 5a, condensation-water drain 5a place also is provided with 20, the seven grades of air heaters 18 of condensation-water drain visor and is provided with the heating steam air inlet.Fourdrinier wire casing 3 near fourdrinier wire guipure driven pulley 1 one ends is provided with air inlet, and the fourdrinier wire casing 3 of close fourdrinier wire guipure driving wheel 19 1 ends is provided with exhaust outlet.
Acting as of steam-water separator makes condensed water separate with indirect steam, and the higher steam condensate (SC) of relative pressure can carry out double evaporation-cooling in the process that pressure reduces, form new condensed water and indirect steam.Because the density of indirect steam is positioned at the top of steam-water separator less than the density of condensed water, condensed water is positioned at the bottom of steam-water separator, and steam is separated with water.Acting as of air heater utilizes the heat that contains in the steam by air heater air to be heated.
The principle of utilizing the gelatin fourdrinier wire dryer heating system of present embodiment to carry out the gelatin oven dry is: the air that upper level comes, and through the air heater heating, the temperature of air is raise, reduce the relative humidity of air.Air after heating passes glue-line glue is carried out drying, and this moment, the relative humidity of air raise, and entered the heating of next stage air heater, and the next stage glue-line is dried.The process of carrying out the gelatin oven dry is: high temperature, high steam (steam pressure 〉=0.6MPa) heat the hot-air (55 ℃) that the 6th grade of gelatin drying chamber comes by the 7th grade of air heater 18, make air themperature rise to 60 ℃, remove to dry the 8th grade of gelatin in the gelatin drying chamber; (pressure 〉=0.6MPa) enters the 6th grade of steam-water separator 26 (pressure 〉=0.5MPa) through the expansion valve that dams to the condensed water of the 7th grade of air heater 18, part water carries out double evaporation-cooling and becomes indirect steam, enter the hot-air (50 ℃) that the 6th grade of air heater 15 heating level V gelatin drying chambers come, make air themperature rise to 55 ℃, remove to dry the 7th grade of gelatin in the gelatin drying chamber; By that analogy, last condensed water becomes water at atmospheric pressure and discharges system through condensation-water drain 5a, and the condensate temperature of Pai Chuing reaches the purpose of saving steam less than 100 ℃ with this at last.The fourdrinier wire casing air register that is arranged on every grade of relative side of air heater is used for making air to flow successively in different gelatin drying chambers, is convenient to heat and guarantee the temperature of air in every grade of gelatin drying chamber.
As can be seen from the above embodiments, the utility model embodiment has changed traditional fourdrinier wire air heat mode, has utilized the heat enthalpy value of steam to greatest extent, has reduced the consumption of steam; Stepped steam heated mode, the temperature difference is less, and condensate liquid is less, and the liquid film layer that steam and air heat-transfer surface place form is thinner, coefficient of heat transfer height, heat transfer rate is fast, and heat loss is little; This system architecture is simple, is convenient to carry out automation control.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection domain of the present utility model.