Gas hot blast stove

Abstract

The utility model discloses a gas hot-blast stove which comprises a stove body outer shell, a stove body inner shell arranged in the stove body outer shell, a rotary cavity formed between the stove body outer shell and the stove body inner shell, a draught fan connected with one side of the left end of the rotary cavity, a ventilation opening formed in the right end of the stove body inner shell, a combustion chamber arranged in the stove body inner shell, an air inlet formed in the right side of the combustion chamber and an air outlet pipe connected with the left side of the combustion chamber. The upper end of the combustion chamber is connected with a gas pipe; by arranging the furnace body outer shell and the furnace body inner shell, fuel gas enters the fuel gas chamber through the fuel gas pipe, air enters the rotary cavity through the fan and then flows into the combustion chamber from the other end of the rotary cavity, the discharged air is inevitably combusted through the combustion chamber, and therefore the high temperature of discharged air can be guaranteed; and air certainly enters the combustion chamber and then flows out of the air outlet pipe, so that sufficient mixing of the air and the fuel gas is guaranteed, and the air is prevented from directly flowing away without combustion.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot blast stoves, and particularly relates to a gas hot blast stove. Background Art

[0002] A gas hot blast stove is a heating device that uses gas as fuel. It mixes gas and air in a combustion chamber for combustion, and the generated high-temperature combustion gas transfers heat to the object to be heated through a heat exchanger, thereby achieving the purpose of heating. In condiment production factories, gas hot blast stoves are often used to heat drying towers to dry condiment liquids into condiment powders, which is convenient for export, transportation, and consumption.

[0003] For gas hot blast stoves, in the prior art, after retrieval, the utility model patent with the Chinese patent publication number CN210772763U discloses an efficient gas hot blast stove. As Figure 1 shown, it mainly includes a furnace body a. One end inside the furnace body a is connected with a combustion nozzle c through a burner fixed end b. The combustion nozzle c is provided with air flow holes d. The other end inside the furnace body a is set as a hot air outlet e. A combustion air pipe f is arranged on the upper side of the furnace body a. After air and gas enter the combustion nozzle, combustion occurs, and the high-temperature combustion gas after combustion flows out from the hot air outlet and enters the heating and drying chamber to be heated.

[0004] In the actual implementation process of the gas hot blast stove, it is found that there are areas for improvement: after air enters from the combustion pipe, a considerable part directly flows away from the hot air outlet without being fully diffused and introduced into the combustion nozzle. In this way, firstly, the mixed combustion of air and gas is not sufficient, and secondly, the air is not fully heated, resulting in insufficient heat of the outflowing gas. Content of the Utility Model

[0005] In view of the deficiencies and defects existing in the prior art, the purpose of the utility model is to provide a gas hot blast stove, which solves the problems that in the existing gas hot blast stoves, after air enters from the combustion pipe, a considerable part directly flows away from the hot air outlet without being fully diffused and introduced into the combustion nozzle, resulting in insufficient mixed combustion of air and gas; and the air is not fully heated, resulting in insufficient heat of the outflowing gas.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a gas hot blast furnace, comprising a furnace body shell, a furnace body inner shell is arranged inside the furnace body shell, a rotating chamber is formed between the furnace body shell and the furnace body inner shell, one side of the left end of the rotating chamber is connected to the fan, and a ventilating port connected to the rotating chamber is arranged at the right end of the furnace body inner shell, a combustion chamber is connected to the inside of the furnace body inner shell through a connecting plate, a transition chamber is formed between the combustion chamber and the furnace body inner shell, an air inlet is arranged on the right side of the combustion chamber, and an air outlet is connected to the left side, the left end of the air outlet pipe extends out of the furnace body shell, the upper end of the combustion chamber is connected to the gas pipe, the upper end of the gas pipe extends out of the furnace body shell, and a combustion ignition device is arranged in the combustion chamber.

[0007] As a further improvement of the present invention, an air distribution plate is provided in the rotary cavity, the air distribution plate is located on the right side of the interface between the rotary cavity and the fan, and a plurality of ventilation holes are provided on the air distribution plate.

[0008] As a further improvement of the present invention, a certain gap is provided between the air inlet and the vent.

[0009] As a further improvement of the utility model, the left end of the furnace body inner shell is attached to the furnace body outer shell.

[0010] As a further improvement of the utility model, a plurality of flow holes are provided on the combustion chamber.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. By setting a furnace body shell and a furnace body inner shell, a rotary cavity is formed between the furnace body shell and the furnace body inner shell, and a vent is set at the right end of the furnace body inner shell, a combustion chamber is set inside the furnace body inner shell, and a transition cavity is formed between the combustion chamber and the furnace body inner shell. An air inlet is set on the right side of the combustion chamber, and an air outlet is connected to the left side. The upper end of the combustion chamber is connected to the gas pipe. When working, the gas enters the gas chamber through the gas pipe, and the air enters the rotary cavity through the fan, and then flows into the combustion chamber and the transition cavity from the other end of the rotary cavity. The air flowing into the combustion chamber is mixed with the gas and burned, and finally flows out from the outlet pipe. Because the outlet pipe is directly connected to the combustion chamber, the air going out is It must pass through the combustion chamber for combustion, so it can ensure a higher temperature of the exhaust gas and avoid the problem of unqualified exhaust temperature; in addition, during the operation, the air must enter the combustion chamber and then flow out from the exhaust pipe, which also ensures the full mixing of air and fuel gas and avoids the air flowing away directly without combustion; in addition, by setting up a rotary chamber and a transition chamber, when the combustion chamber is burning, the high temperature of the combustion chamber can preheat the air flowing through the transition chamber and the rotary chamber, increase the temperature of the air entering the combustion chamber, and improve the combustion effect after the air enters the combustion chamber, that is, make full use of the combustion waste heat of the combustion chamber to preheat the incoming air and improve the combustion effect and the exhaust temperature.

[0013] 2. By arranging an air distribution plate in the rotary cavity, the introduced air can be evenly distributed and scattered in the rotary cavity, facilitating the uniform preheating of the air by the combustion chamber.

[0014] 3. By providing a certain gap between the air inlet and the ventilation opening, it is convenient for air to enter the transition cavity to complete the preheating of the air by the combustion chamber.

[0015] 4. By arranging a flow-through hole on the combustion chamber, the air in the transition cavity can penetrate into the combustion chamber from the periphery, realizing the peripheral wrapping of the air and improving the mixed combustion effect of the gas and air. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described below with reference to the accompanying drawings:

[0017] Figure 1 is a schematic structural diagram of the prior art;

[0018] Figure 2 is a three-dimensional structural diagram of the present utility model;

[0019] Figure 3 is Figure 2 a sectional view of;

[0020] Figure 4 is Figure 3 a sectional view taken along line A-A of;

[0021] In the figures: 1, furnace body shell; 2, inner furnace body shell; 3, rotary cavity; 4, fan connection; 5, ventilation opening; 6, connecting plate; 7, combustion chamber; 8, transition cavity; 9, air inlet; 10, outlet duct; 11, combustion ignition device; 12, air distribution plate; 13, flow-through hole; 14, gas pipe; 15, ventilation hole; 16, base; 17, support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the present utility model in detail with reference to the attached Figures 2 - 4 drawings. For clearer illustration, only the structures related to the inventive points of the present utility model are shown in the figures.

[0023] For the convenience of description, a coordinate system is now defined as Figure 2 shown, with the left-right direction as the horizontal direction, the front-back direction as the longitudinal direction, and the up-down direction as the vertical direction.

[0024] An embodiment of the present utility model discloses a gas hot blast stove. Referring to Figure 2 , Figure 3 and Figure 4, A gas hot blast stove, comprising a furnace body outer shell 1, the furnace body outer shell 1 is fixedly connected with a base 16, a furnace body inner shell 2 is arranged inside the furnace body outer shell 1, the left end of the furnace body inner shell 2 is attached to the furnace body outer shell 1, and a rotary cavity 3 is formed between the furnace body outer shell 1 and the furnace body inner shell 2. The left end side of the rotary cavity 3 is connected to a blower 4, and a support 17 is provided at the bottom of the blower. A ventilation opening 5 communicating with the rotary cavity 3 is provided at the right end of the furnace body inner shell 2. Preferably, an air distribution plate 12 is arranged inside the rotary cavity 3, and the air distribution plate 12 is on the right side of the interface between the rotary cavity 3 and the blower. A plurality of ventilation holes 15 are provided on the air distribution plate 12, so that the introduced air can be evenly distributed and scattered in the rotary cavity 3, facilitating the uniform preheating of the air by the combustion chamber 7.

[0025] Inside the furnace body inner shell 2, a combustion chamber 7 is connected through a connecting plate 6. A transition cavity 8 is formed between the combustion chamber 7 and the furnace body inner shell 2. A plurality of through-flow holes 13 are provided on the combustion chamber 7, so that the air in the transition cavity 8 can penetrate into the combustion chamber 7 from the periphery, realizing the peripheral wrapping of the air and improving the mixed combustion effect of gas and air. An air inlet 9 is provided on the right side of the combustion chamber 7, and an air outlet pipe 10 is connected to the left side. The left end of the air outlet pipe 10 extends out of the furnace body outer shell 1. The upper end of the combustion chamber 7 is connected to a gas pipe 14, and the upper end of the gas pipe 14 extends out of the furnace body outer shell 1. A combustion ignition device 11 is arranged inside the combustion chamber 7.

[0026] In addition, a certain gap is provided between the air inlet 9 and the ventilation opening 5, facilitating the entry of air into the transition cavity 8 to complete the preheating of the air by the combustion chamber 7.

[0027] The implementation principle and technical effects of the utility model are as follows: by arranging a furnace body shell 1 and a furnace body shell 2, a rotary cavity 3 is formed between the furnace body shell 1 and the furnace body shell 2, and a vent 5 is arranged at the right end of the furnace body shell 2, a combustion chamber 7 is arranged inside the furnace body shell 2, a transition cavity 8 is formed between the combustion chamber 7 and the furnace body shell 2, an air inlet 9 is arranged on the right side of the combustion chamber 7, an air outlet pipe 10 is connected to the left side, and the upper end of the combustion chamber 7 is connected to the gas pipe 14. When working, the gas enters the gas chamber through the gas pipe 14, and the air enters the rotary cavity 3 through the fan, and then flows into the combustion chamber 7 and the transition cavity 8 from the other end of the rotary cavity 3. The air flowing into the combustion chamber 7 is mixed with the gas and burned, and finally flows out from the gas outlet pipe. The combustion chamber 7 is directly connected, so the outgoing air must be burned in the combustion chamber 7, so the high temperature of the outlet gas can be guaranteed to avoid the problem of unqualified outlet temperature; in addition, during the operation, the air must enter the combustion chamber 7 and then flow out from the outlet pipe, which also ensures the full mixing of air and fuel gas and avoids the direct flow of air without combustion; in addition, by setting the rotary chamber 3 and the transition chamber 8, when the combustion chamber 7 is burning, the high temperature of the combustion chamber 7 can preheat the air flowing through the transition chamber 8 and the rotary chamber 3, increase the temperature of the air entering the combustion chamber 7, and improve the combustion effect after the air enters the combustion chamber 7, that is, make full use of the combustion waste heat of the combustion chamber 7 to preheat the incoming air and improve the combustion effect and outlet temperature.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. It should be understood that the specific implementation methods described herein are only used to understand the present utility model, and are not used to limit the present utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present utility model.

Claims

1. A gas hot blast furnace, comprising a furnace shell, characterized in that: A furnace body inner shell is provided inside the furnace body shell, a rotating chamber is formed between the furnace body outer shell and the furnace body inner shell, one side of the left end of the rotating chamber is connected to the fan, and a ventilating port connected to the rotating chamber is provided at the right end of the furnace body inner shell. A combustion chamber is connected to the inside of the furnace body inner shell through a connecting plate, and a transition chamber is formed between the combustion chamber and the furnace body inner shell. An air inlet is provided on the right side of the combustion chamber, and an air outlet pipe is connected to the left side. The left end of the air outlet pipe extends out of the furnace body shell, the upper end of the combustion chamber is connected to the gas pipe, and the upper end of the gas pipe extends out of the furnace body shell, and a combustion ignition device is provided in the combustion chamber.

2. A gas hot blast stove according to claim 1, characterized in that: An air distribution plate is arranged in the rotary cavity, and the air distribution plate is located on the right side of the interface between the rotary cavity and the fan, and a plurality of ventilation holes are arranged on the air distribution plate.

3. A gas-fired hot blast stove according to claim 1, characterized in that: A certain gap is arranged between the air inlet and the vent.

4. A gas hot blast stove according to claim 1, characterized in that: The left end of the furnace body inner shell is attached to the furnace body outer shell.

5. A gas hot blast stove according to any one of claims 1 to 4, characterized in that: The combustion chamber is provided with a plurality of flow holes.

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