CN201302289Y - Hot-air supply device taking steam as heat source - Google Patents

Abstract

The utility model discloses a hot air supply device using steam as a heat source, which comprises a thermal insulation box with a cold air inlet and a hot air outlet. There are a plurality of steam heaters in the box, and the upper ends of the steam heaters are connected with an upper collector. , the upper collector is connected to the main steam pipeline, the lower end of the steam heater is connected to the lower collector, the lower collector is connected to the sewage pipe and the return pipe, and a hot water preheater is installed on the cold air inlet side of the box body, and the hot water The upper end of the preheater is connected to the return pipe, and the lower end is connected to the upper water pipe of the boiler. Since steam is used as the heat source, the advantage is that the steam supply, temperature and pressure are relatively stable, so that the temperature of the hot air is basically constant, and the moisture uniformity of the grain after drying is improved. In order to guarantee, at the same time, because the high-temperature return water of the steam heater is introduced into the hot water preheater to preheat the cold air, the high-temperature return water is reused, and the heat energy is fully utilized. Finally, the return water temperature can reach 60°C .

Description

A hot air device using steam as a heat source

technical field

The utility model relates to an air heating device, in particular to an air heating device for providing hot air for a grain dryer.

Background technique

In recent years, with the development of alcohol, starch, and oil industries in the north, these industries need a large amount of corn or soybeans as processing raw materials every year. Since the newly harvested corn or soybean has high moisture content and is not suitable for direct processing and storage, it must be dried to make it reach the moisture that is convenient for processing and storage. At present, most of these industries widely use tower dryers as drying equipment for corn and soybeans, but these dryers mainly rely on separate supporting coal-fired hot blast stoves to provide heat sources. When it is too high, it will carbonize the grain, and even cause a fire. At the same time, it also makes these users face problems such as large investment, large space occupation, and increased pollution sources.

Utility model content

The technical problem to be solved by the utility model, the technical problem to be solved by the utility model is to provide a device that uses steam as a heat source to provide hot air for a grain dryer.

The technical solution adopted to solve the technical problem: a hot air device with steam as the heat source, including an insulation box with a cold air inlet and a hot air outlet. There are multiple steam heaters in the box. The upper end of the steam heater is connected to the The upper collector is connected, the upper collector is connected to the main steam pipeline, the lower end of the steam heater is connected to the lower collector, the lower collector is connected to the sewage pipe and the return pipe, and a hot water preheater is installed on the cold air inlet side of the box. The upper end of the hot water preheater is connected with the return pipe, and the lower end is connected with the upper water pipe of the boiler.

As an improvement of the utility model, a vapor-water separation device is provided on the return pipe.

The steam-water separation device is composed of a bypass pipe and a steam trap connected in parallel with the bypass pipe.

As a further improvement of the utility model, a temperature gauge and a pressure gauge are provided on the upper collector.

As a further improvement of the utility model, a hot water pipeline pump is also provided on the pipeline at the lower end of the hot water preheater.

As a preferred embodiment of the present utility model, the steam heater and the hot water preheater are finned heat exchange tubes.

Beneficial effects: Since the steam is used as the heat source, the advantage is that the steam supply, temperature and pressure are relatively stable, so that the temperature of the hot air is basically constant, and the moisture uniformity of the grain after drying is guaranteed; The water is introduced into the hot water preheater to preheat the cold air, which realizes the reuse of high temperature return water, fully utilizes the heat energy, and finally discharges the return water at a temperature of 60°C; since the hot water pipeline pump is installed to force the return water system to circulate, Avoid freezing of pipelines in winter; due to the use of finned heat exchange tubes, the utility model has high heat exchange efficiency and a small footprint. In addition, the utility model is used to provide hot air for the grain dryer without the need for additional hot blast stoves. It reduces investment, eliminates pollution sources, saves energy and protects the environment, and is easy to operate.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Fig. 1 is the front view of the utility model;

Fig. 2 is the top view of the utility model;

Fig. 3 is a left view of the utility model.

Detailed ways

Fig. 1 has shown the main body structure of the present utility model, and a kind of heating wind device that uses steam as heat source of the present utility model comprises the insulation box body 3 that cold air inlet 1 and hot air outlet 2 are arranged, and there is in the box body 3 A plurality of steam heaters 4, the steam heater 4 is a finned heat exchange tube, the upper end of the steam heater 4 is connected to the upper collector 5, and the upper collector 5 is provided with a thermometer 13 and a pressure gauge 14, and the upper collector 5 is equipped with a temperature gauge 13 and a pressure gauge 14. The collector 5 is connected to the main steam pipe 6, and the lower end of the steam heater 4 is connected to the lower collector 7. As shown in Figure 2, the lower collector 7 is connected to the sewage pipe 8 and the return pipe 9, and the return pipe is provided with a bypass A steam-water separation device composed of a pipe 12 and a steam trap 11 connected in parallel with the bypass pipe. A hot water preheater 10 is provided on the side of the cold air inlet 1 in the box. The hot water preheater 4 is a finned heat exchange device. Pipe, as shown in Figure 3, the upper end of the hot water preheater 10 is connected with the return pipe 9, and the lower end is connected with the upper water pipe 15 of the boiler, and a hot water pipeline pump 16 is also arranged on the lower end pipeline of the hot water preheater.

The working process of the present utility model is described below. The high-temperature steam from the boiler passes through the main steam pipeline 6 to the upper collector 5, and is distributed to the steam heater 4 by the upper collector 5 to heat the air in the casing 3. The steam and water mixture flowing out from the lower end of the steam heater 4 passes through the steam-water separation device, and the separated high-temperature water enters the hot water preheater 10 through the return pipe 9, and the hot water preheater 10 preheats the air entering the box , the low-temperature return water flowing out from the hot water preheater 10 is forced to circulate through the pipeline pump 16 through the upper water pipe 15 of the boiler to the boiler.

Claims (6)

1. A hot air device using steam as a heat source, comprising an insulated box (3) with a cold air inlet (1) and a hot air outlet (2), and a plurality of steam heaters ( 4), the upper end of the steam heater (4) is connected to the upper collector (5), the upper collector (5) is connected to the main steam pipeline (6), and the lower end of the steam heater (4) is connected to the lower collector (7) , the lower collector (7) is connected to the sewage pipe (8) and the return pipe (9), and it is characterized in that: a hot water preheater (10) is provided on the side of the cold air inlet (1) in the box body (3), The upper end of the hot water preheater (10) is connected with the return pipe (9), and the lower end is connected with the boiler upper water pipe (15). 2. A hot air supply device using steam as a heat source according to claim 1, characterized in that: a steam-water separation device is provided on the return pipe (9). 3. A kind of hot wind device using steam as heat source according to claim 2, characterized in that: said steam-water separation device consists of a bypass pipe (12) and a steam trap ( 11) Composition. 4. A hot air supply device using steam as a heat source according to claim 2, characterized in that: the upper collector (5) is provided with a thermometer (13) and a pressure gauge (14). 5. A hot air supply device using steam as a heat source according to claim 3, characterized in that: a hot water pipeline pump (16) is also provided on the pipeline at the lower end of the hot water preheater. 6. A hot air supply device using steam as a heat source according to any one of claims 1 to 5, characterized in that: the steam heater (4) and the hot water preheater (10) are finned Type heat exchange tube.

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