CN2585117Y - Coal-fired hot-air stove for greenhouse - Google Patents

Abstract

The utility model belongs to an agricultural facility, in particular to a coal-fired hot air blower for a greenhouse. Its main technical scheme includes the furnace body and the jacket located outside the furnace body, an annular space is formed between the furnace body and the jacket, a coal inlet and a chimney are arranged on the furnace body, and there is an ash outlet at the lower part. A flue in the furnace is set in the furnace formed by the furnace body, and an air inlet and an air outlet are arranged on the upper part of the furnace body. One end of the flue in the furnace is connected to the air inlet, and the other end is connected to the air outlet. The annular space is connected, and the chimney is connected with the furnace. After using the device, thermal efficiency can be improved and energy consumption can be reduced.

Description

Coal-fired hot air stove for greenhouse

technical field

The utility model belongs to an agricultural facility, in particular to a coal-fired hot air stove used in a greenhouse.

Background technique

In the prior art, fuel-fired air heaters are often used to heat up greenhouses. The purchase and use costs of such equipment are relatively high. For this reason, the applicant proposed a method of using coal to generate heat in Chinese patent 00265412.1. The fan sends hot air to the vegetable greenhouse technology. In comparison, this heating method has a lower cost. However, after a period of use, it was found that since the hot air passage used in this heating method is located outside the furnace body, most of the heating pipes are not in direct contact with the flue gas, which affects the heat exchange effect.

Contents of the invention

The purpose of this utility model is to design a coal-fired hot air stove for greenhouses, so as to further improve heat transfer efficiency and reduce costs.

Its main technical scheme includes the furnace body and the jacket located outside the furnace body, an annular space is formed between the furnace body and the jacket, a coal inlet and a chimney are arranged on the furnace body, and there is an ash outlet at the lower part. A flue in the furnace is set in the furnace formed by the furnace body, and an air inlet and an air outlet are arranged on the upper part of the furnace body. One end of the flue in the furnace is connected to the air inlet, and the other end is connected to the air outlet. The annular space is connected, and the chimney is connected with the furnace.

Radiating fins are arranged on the part of the outer wall of the furnace corresponding to the annular space; the flue in the furnace is U-shaped, and multiple U-shaped flues in the furnace are evenly arranged in the furnace; wheels are connected at the bottom of the furnace body; Set the grate; set the exhaust port at the bottom of the jacket.

The utility model has the advantages that the furnace body is changed from the original refractory brick to thin-walled metal with better thermal conductivity, and a U-shaped flue is arranged in the furnace, so that the air in the flue is directly heated in the furnace, which improves the thermal efficiency; The outlet of the channel is connected with the annular space, and the outer wall of the furnace in the annular space is provided with cooling fins. After the air is heated by the U-shaped flue in the furnace, it enters the annular space. Under the action of the cooling fins and the outer wall of the furnace, Heat further. Secondly, this device does not need heavy refractory materials, and after wheels are arranged at the bottom of the furnace body, it is easier to carry and install; at the same time, the material used in this device has high strength and a relatively long service life.

Description of drawings

Fig. 1 is a structural diagram of the utility model.

Detailed ways

As shown in the figure: the device includes a furnace body 14 and a jacket 5 located outside the furnace body 14, an annular space 6 is formed between the furnace body 14 and the jacket 5, and a coal inlet 9 and a chimney 1 are arranged on the furnace body 14 , there is an ash outlet 11 at its lower part, and a U-shaped furnace flue 4 is arranged in the furnace 8 formed by the furnace body 14, and a plurality of U-shaped furnace flues 4 are evenly arranged in the furnace 8, and in the furnace The upper part of body 14 is provided with air inlet 3 and air outlet 2, and one end of flue 4 in each furnace is connected with air inlet 3, and the other end is connected with air outlet 2, and the air outlet end of air outlet 2 is connected with annular space 6, and the chimney 1 is connected to the furnace 8, a fire grate 10 is arranged at the bottom of the furnace 8, and an exhaust port 13 is arranged at the bottom of the jacket 5.

Radiating fins 7 are arranged on the outer wall of the furnace body 14 corresponding to the portion inside the annular space 5 , and the heat transfer efficiency can be further improved by using the cooling fins to increase the temperature of the hot air flow.

Wheels 12 are connected to the bottom of the furnace body 14 for easy transportation and installation.

When working, coal is fed into the furnace 8 from the coal inlet 9, and the air outlet 13 is connected to the greenhouse by pipes. The flue gas generated during coal combustion is discharged from the furnace to the chimney, and the air enters from the air inlet 3 and passes through the smoke in the U-shaped furnace. After passage 4, it is discharged from the air outlet 2 and enters the annular space 6, passes through the annular space from top to bottom, contacts the outer wall of the furnace and the heat sink, and performs heat exchange again to further heat the air, and finally passes through the air outlet 13 are delivered to the greenhouse for heating the greenhouse. The slag falls into the ash outlet 11 through the fire grate, and then is regularly removed.

Claims (6)

1, the warmhouse booth coal-fired hot-blast stove, comprise body of heater (14) and be positioned at the outer chuck (5) of body of heater (14), between body of heater (14) and chuck (5), form annular space (6), coal filling hole (9) and chimney (1) are set on body of heater (14), ash hole (11) is arranged in its underpart, it is characterized in that in the burner hearth (8) that forms by body of heater (14), stove inner flue (4) being set, air inlet (3) and air outlet (2) are set on the top of body of heater (14), one end of stove inner flue (4) is connected with air inlet (3), the other end is connected with air outlet (2), the outlet air end of air outlet (2) is connected with annular space (6), and chimney (1) is connected with burner hearth (8).

2, hot-blast stove according to claim 1 is characterized in that corresponding to the part in the annular space (5) fin (7) being set at body of heater (14) outer wall.

3, hot-blast stove according to claim 1 is characterized in that stove inner flue (4) takes the shape of the letter U, and the stove inner flue (4) of many U-shapeds is evenly distributed in burner hearth (8).

4, hot-blast stove according to claim 1 is characterized in that connecting wheel (12) in the bottom of body of heater (14).

5, hot-blast stove according to claim 1 is characterized in that in the bottom of burner hearth (8) fire grate (10) being set.

6, hot-blast stove according to claim 1 is characterized in that in the bottom of chuck (5) exhaust outlet (13) being set.

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