CN2150929Y

CN2150929Y - Hot air drier for coating

Info

Publication number: CN2150929Y
Application number: CN 93216388
Authority: CN
Inventors: 董伟国
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-22
Filing date: 1993-06-22
Publication date: 1993-12-29
Anticipated expiration: 2003-06-22

Abstract

The utility model relates to a hot air drier for coating, comprising a hot air drying stove (1). A circulating blower (6) is communicated with the air sucking port (4) of the drying stove, and the main pipe (7) of a circulating main body connected with the circulating blower (6) is respectively connected with the branch pipe (8) of the circulating main body, the branch pipe (9) of a reheating main body and the branch pipe (10) of a burning main body. The air passing through the branch pipe (9) is burned in burning chambers in a burner (13) and a preheater and is discharged into the atmosphere through an exhaust pipe (15). The utility model has the advantages of energy saving, less investment, low operative cost, low environmental pollution, etc. The utility model is a new-generation hot air drier and the utility model can be widely used in various industries.

Description

Hot air drier for coating

The utility model relates to the hot-air drying device that a kind of application is handled.

In paint industry, when workpiece enters hot-air drying stove with the filming final processing of liquid state or powdery, can be subjected to the circulating current heating of proper temperature, this air-flow in heating process because of reduce temperature need be in cyclic process additional heat, workpiece will volatilize harmful gas in drying course, it is low rate of drying to take place when this pernicious gas reaches finite concentration, low in glossiness, problems such as ecological deterioration, therefore need be in not following process a part of recyclegas of discharging and replenish a part of fresh air, keep volatile matter in the recyclegas in certain concentration range with this.The thermal source of electricity or steam hot wind is adopted in existing application substantially with hot-air drying stove, this electricity consumption or steam are made the hot-air drying stove investment costliness of thermal source, it comprises the electric power increase-volume, electric heater unit and supporting steam boiler etc., the operating cost height, also have the power supply contradiction in power tense area simultaneously, shortcoming such as the energy utilization rate in the Steam Heating process is low, having above-mentioned hot-air drying stove that the pernicious gas of discharging is handled again is the actual so far difficult problem that solves of environmental protection.

Goal of the invention of the present utility model provides a kind of thermal efficiency height, and small investment has application hot-air drying device energy-conservation and the improvement noxious gas emission, can obtain high-quality coated articles.

Provide structure of the present utility model in detail below in conjunction with accompanying drawing.

Accompanying drawing is a structural representation of the present utility model.

See also accompanying drawing, structure of the present utility model is: comprise hot air drying stove 1, it is inhaled mouthfuls 4 by low-temperature circulating gas and communicates with circulation blower fan 6, circulation blower fan 6 communicates with hot air drying stove 1 by loop-body supervisor 7, key of the present utility model be circulation gas supervisor 7 respectively be provided with valve 11,22 and 12 again heating body manifold 9, gas arm 10 communicates circulation gas arm 8 with burning but, the other end of circulation gas arm 8 links to each other with blender 18, insert again gas preheater 14 after burning but gas arm 10 and burner 13 being connected, heated air arm 9 communicates with preheater 14 again, the circulation gas outlet of preheater 14 communicates with blender 18 by pipeline 17, and the outlet of blender 18 communicates with the circulation air inlet 5 of hot air drying stove through the pipeline 19 of mixing. The course of work of the present utility model is after workpiece 2 is sent into hot-air drying stove by conveyer, is subjected to the homogeneous heating of furnace high-temperature gas, and circulation gas is through heating Workpiece, temperature reduces and contains harmful gas of workpiece coating volatilization, this low-temperature circulating gas is inhaled mouthfuls 4 and is entered 6 superchargings of circulation blower fan from the gas that follows that places in the hot air drying stove suitable position, is entered blender 18, enters blender 18 by pipeline 17 after heated air arm 9 enters preheater 14 again, enters combustion chamber that burner 13 enters preheater 14 again and will be harmful to and drain into atmosphere after the gas pyrolytic becomes innocuous gas through burning but gas arm 10 through circulation gas arm 8 respectively by circulation gas supervisor 7 again. Blender 18, be mixed into the uniform gas of temperature through the high-temperature gas that preheater 14 comes out and the cryogenic gas of directly discharging from circulation blower fan 6, enter circulation gas import 5 and enter drying oven through gaseous mixture pipeline 19 again.

The top of above-mentioned preheater 14 is provided with an exhaust stack 15, be provided with valve 16 in it, valve 16 manual valves, in order to control the speed of discharging waste gas, the utilization of favourable waste heat, the temperature that control enters the circulation gas of blender 18 by pipeline 17, adjustment enters the temperature of the mist of gaseous mixture pipeline 19.

For further adjusting the temperature of the recyclegas that enters drying oven, on mist pipeline 19, be provided with a thermocouple 20 and temperature indicating device 21, temperature indicating device can be a thermometer.

Above-mentioned transfer device 3 can be high-order hook conveyer chain, also can be the conveyor-belt apparatus of low level, can adapt to the situation of various workpiece like this, and the import and export of hot-air seasoning stove are sealed into air curtain or fire door.

Described recyclegas suction inlet 4 is positioned at the lower position of drying oven, and circulation air inlet 5 is positioned at the higher temperatures of drying oven, helps height gas flow and heat transmission like this.

In the utility model, the temperature of the burning combustion chamber in burner and the preheater is controlled to be 600-800 ℃, pernicious gas can be decomposed substantially, can effectively control the temperature that enters the mist in the hot-air drying stove by control valve 11 and 22 simultaneously, therefore the utility model can adapt to various coating, thisly whole recyclegas are not heated and pernicious gas can be cut down the consumption of energy greatly as the partial combustion composition, reduce the concentration of the pernicious gas that enters atmosphere simultaneously, the gas preheater replacement electricity of the utility model employing gas or liquid fuel or steam are as the thermal source of workpiece drying in addition, not only enlarged heating range, it is few also to have equipment investment, the advantage that operating cost is low, compare with electrical heating, investment reduces about 70%.

Claims

1, a kind of application hot-air drying device, comprise hot-air seasoning stove (1), it communicates with circulating fan (6) by low temperature recyclegas suction inlet (4), circulating fan (6) is responsible for (7) by recyclegas and is communicated with hot-air seasoning stove 1, it is characterized in that recyclegas be responsible for (7) respectively be provided with valve 11,22 and 12 the arm of heated air again (9), recyclegas arm (8) and burn but that gas service pipe (10) communicates, the other end of recyclegas arm (8) communicates with blender 18, insert gas preheater (14) again after burning but gas service pipe (10) and burner (13) being connected, heated air arm (9) communicates with preheater (14) again, the recyclegas outlet of preheater (14) communicates with blender (18) by pipeline (17), and the outlet of blender 18 communicates with the circulation air inlet (5) of hot-air seasoning stove through mist pipeline (19).

2, by the described application hot-air drying device of claim 1, it is characterized in that the top of preheater (14) is provided with an exhaust stack (15), be provided with valve (16) in it.

3, by the described application hot-air drying device of claim 1, it is characterized in that gas mixing pipe (19) is provided with a thermocouple (20) and temperature indicating device (21), temperature indicating device can be a thermometer.

4, by the described application hot-air drying device of claim 1, it is characterized in that transfer device (3) is high-order hook transfer chain, or the conveyor-belt apparatus of low level.