CN103322602A - A kind of spherical type line hearth gas stove made of refractory material - Google Patents

Abstract

A gas stove with a molded line hearth. A shell component which is similar to the spherical pan surface and made of refractory materials is added between the barrel-shaped space hearth and the spherical pan surface of the traditional big-pan gas stove and called a molded line hearth, and the spherical pan surface and the inner side surface of the molded line hearth form a narrow channel, so that the heat transfer is enhanced, the heat receiving capacity of the pan surface is increased, and the heat efficiency of the gas stove is greatly improved.

Description

A kind of spherical type line hearth gas stove made of refractory material

Technical field: The present invention relates to a cooker, in particular to a gas cooker that utilizes refractory-shaped line furnace technology to improve thermal efficiency

Background technology: the disadvantages of the current large pot gas stove (Fig. 2) are: ① the smoke exhaust port (13) is arranged under the furnace, the high-temperature gas that has not been working is bypassed, and the heat energy of the gas is not fully utilized; ②Because the flow velocity of the gas in the large space (10) is small, the convective heat release intensity between the spherical heating surface of the pot and the gas is low, so that the ability of the pot to accept the heat of the gas is poor. These two disadvantages make the thermal efficiency of the traditional cauldron gas stove very low. the

Summary of the invention: The purpose of developing the refractory shaped line furnace is to improve the thermal efficiency of the gas stove. Check Fig. 1, a shell (3) made of refractory material similar to the shape of the spherical pot surface, it is fixed tightly next to the spherical pot surface (2), this shell is just called the molded line furnace, its The lower part is the gas inlet (4) of the molded furnace. The high-temperature gas flowing from the gas inlet of the molded furnace flows radially upwards through the narrow channel (5) formed by the surface of the spherical pot and the inner surface of the molded furnace. The flow rate in the narrow channel is higher than that in the barrel-shaped space, and the heat release intensity is obviously improved due to the increase of the flow rate. The high-temperature gas after intense heat exchange transfers heat to the heated food through the pot surface (2), and the temperature is greatly increased. It is lowered, and then flows out from the smoke outlet (6) formed by a circle of gaps formed by the upper part of the profiled furnace and the lower part (1) of the pot, and is collected by the smoke collector (7) and finally discharged into the flue (8). Description of the drawings: The present invention "a spherical shaped line furnace gas stove made of refractory material" will be further described in detail in conjunction with the accompanying drawings. the

Fig. 1 is a schematic diagram of a profiled hearth made of refractory materials for a gas stove of the present invention. the

Fig. 2 is a schematic diagram of a barrel-shaped space furnace of a traditional cauldron gas stove. the

Among the figure, 1 is the lower part of the pot; 2 is the spherical surface of the pot of the stove of the present invention; 3 is the refractory molded line furnace; 4 is the gas inlet of the molded furnace; 5 is the narrow flow channel; 6 is the smoke outlet of the gap; 7 is the smoke collection 8 is the flue; 9 is the pot spherical surface of the traditional large cooker; 10 is the barrel-shaped space of the furnace; 11 is the gas inlet of the furnace; 12 is the refractory material furnace wall; 13 is the flue. the

Specific implementation method: choose a traditional cauldron gas stove with a diameter of Φ800, and change the refractory material barrel-shaped space hearth of the stove into a refractory spherical shaped line hearth. As for the fixed structure of the shaped line hearth, ordinary technical personnel can design it without repeat. The following is the result of the thermal performance test and trial of these two stoves. the

    〖Barrel-shaped space hearth stove〗 〖Shape-shaped hearth stove〗

1 Rotameter 77 cells 76

2 Weight of heated water 33 kg 33

3 Initial water temperature 10℃ 23

5 End water temperature 90℃ 94

5 Calculation of effective calories 2640 kcal 2343

6 LPG low calorific value 10000 kcal/kg 10000

7. Consumption of LPG weight 0.8835 kg 0.3664

8 Calculation of heat supply 8835 kcal 3664

9 heating time 0.3713 hours 0.1344

10 Exhaust temperature 664～667℃ 51～105

11 Calculated thermal efficiency 29.88% 63.9%

12 Calculate LPG flow 2.38 kg/h 2.73

13 Calculation of effective heat flow 7110.1 kcal/hour 17433

14 Test Dates 12/3-12 24/11-11

Note:

※1 The thermocouple thermometer installed on the pot cover has been checked with a glass thermometer when measuring the water temperature. the

※2 The rotameter has been calibrated to indicate the size of the firepower. It is generally believed that the thermal efficiency of the two stoves must be compared under the same firepower conditions. the

※3 It is considered that the heat dissipation from the lid and the heat from the air roughly cancel each other out. the

※4 The greater the firepower of the gas stove, that is, the greater the weight flow rate of LPG, the lower the thermal efficiency. In the test of "barrel-shaped space furnace stove", the weight flow rate of LPG is only G _F = 2.379Kg/H, and the measured thermal efficiency is compared with The working condition of the maximum firepower of the stove is 4Kg/H, but because its useful heat flow rate is too low, only 7110.1 kcal/hour, the stove has to work often at the working condition of high firepower of 4Kg/H, although the thermal efficiency is lower Some.

※5 The measuring point of exhaust gas temperature t _gas is outside the exhaust port of the furnace.

After long-term tests and trials, the thermal performance data is excellent and stable, which shows the effectiveness and practicability of the refractory-shaped line furnace gas stove. the

Claims (1)

1. the gas-cooker of a belt type line hearth, compare with the barrel-shaped space burner hearth (10) of traditional cauldron gas-cooker, it is characterized in that: between its barrel-shaped space burner hearth and spherical pot face, add similar with a spherical pot face housing parts (3) made from refractory material, be called the molded line burner hearth, it is close to spherical pot face (2) fixes it, its bottom is molded line burner hearth fuel gas inlet (4), molded line upper furnace and bottom, pot edge (1) have formed a circle slit outlet flue (6), flow through next high-temperature fuel gas from molded line burner hearth fuel gas inlet (4), make progress into the flow through slype (5) of spherical pot face and molded line burner hearth medial surface composition of radiation-like, at this, the heat of combustion gas is passed to by pot face (2) and is heated food, stood with the strong heat exchange of pot face after the high-temperature fuel gas temperature reduced, flow out through slit outlet flue (6), collected by smoke-collecting apparatus (7), enter at last flue (8).

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