Earth fire gun combustion device for low-temperature uniform oven

Abstract

The invention relates to the technical field of metallurgical industry, in particular to an earth fire gun combustion device for a low-temperature uniform oven. Comprising at least one porous jet burner arranged in a smelting furnace body, at least one temperature sensor arranged in the smelting furnace body, a mixed gas inlet pipe communicated with the gas inlet end of the porous jet burner, and a gas supply module communicated with the mixed gas inlet pipe. Wherein the gas supply module comprises a compressed air valve frame and a gas valve frame which are communicated with the mixed gas inlet pipe; and an electric control valve is arranged on a communicating pipeline of the gas valve frame and the mixed gas inlet pipe. According to the invention, the temperature in the furnace body can be strictly controlled according to required heating and heat preservation curves; the overall structure is simple, and the failure rate can be greatly reduced; in addition, through accurate temperature control, when the temperature in the furnace body rises to the set temperature, the size of the electric ball valve can be automatically adjusted, output of natural gas is accurately controlled, fire power is reduced, and the heat preservation effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical industry, in particular to a fire gun combustion device for a low-temperature uniform baking furnace. Background Art

[0002] Conventionally, the walls, bottoms, slopes, etc. of melting furnaces and holding furnaces are damaged or fall off after being used for a long time, and need to be re-casted. In order to ensure the service life of the repaired melting furnace and holding furnace, the furnace is gradually heated to remove moisture in the castable, thereby improving the quality and service life of the re-casting.

[0003] The existing oven drying method is to heat the oven according to the oven heating curve using the oven's built-in regenerative burner gun. The disadvantages of using a burner gun are as follows:

[0004] 1. The flame of the burner gun cannot be adjusted

[0005] 2. When using a burner torch to heat, there is direct flame on the side wall of the burner side, and the temperature in the furnace cannot rise evenly, which can easily cause the wall to crack.

[0006] 3. When heating according to the baking curve, if the burner gun encounters a fault that cannot be handled in time, the temperature in the furnace will drop too quickly and need to be heated again. It is impossible to ensure normal heating according to the heating curve, which affects the quality of the baking furnace.

[0007] 4. The natural gas loss used in direct burning of burners is high, resulting in an increase in natural gas consumption per unit.

[0008] 5. If the temperature is not raised and kept warm strictly according to the time specified in the furnace drying curve, the furnace may burst after pouring and its service life may be reduced. Summary of the Invention

[0009] The purpose of the present invention is to provide a fire gun combustion device for low-temperature uniform furnace baking, which solves the problem that the furnace of a smelting furnace and a holding furnace cannot be evenly heated when a burner is used to bake the furnace during the baking stage after the furnace body is cast and overhauled, reduces the unit consumption of natural gas, avoids damage to the newly cast area after the furnace is baked, and extends the service life of the furnace body after the overhaul.

[0010] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0011] The present invention provides a fire gun combustion device for a low-temperature uniform baking furnace, comprising at least one multi-hole jet burner arranged in a smelting furnace body, at least one temperature sensor arranged in the smelting furnace body, a mixed air intake pipe connected to the air intake end of the multi-hole jet burner, and an air supply module connected to the mixed air intake pipe; wherein the air supply module comprises a compressed air valve rack and a gas valve rack connected to the mixed air intake pipe; an electric control valve is arranged on the connecting pipeline between the gas valve rack and the mixed air intake pipe.

[0012] Furthermore, in this embodiment, the multi-hole jet burner includes a bracket for installation in the smelting furnace body, a hollow blind tube arranged on the bracket, an air inlet pipe vertically connected to the middle of the hollow blind tube, and a plurality of flame holes evenly arranged on the outer wall of the hollow blind tube; wherein the gas is mixed with air and then sprayed and burned to achieve the purpose of dispersing the flame and improving the uniformity of heat distribution.

[0013] Furthermore, in this embodiment, a plurality of flame-spraying holes are radially opened on the outer wall of the hollow blind tube, so as to heat the space inside the smelting furnace body in all directions and improve the uniformity of heat distribution.

[0014] Furthermore, in this embodiment, porous jet burners I, II and III are respectively provided at different heights in the smelting furnace body; the porous jet burners I, II and III are respectively connected to the compressed air valve rack and the gas valve rack through the mixing air intake pipe; the porous jet burners at different positions are used to improve the uniform heating in the space inside the smelting furnace body.

[0015] Furthermore, in this embodiment, the compressed air valve rack is connected to the air inlet end of the mixed air intake pipe through an air delivery pipe, and a ball valve I is provided on the pipeline of the air delivery pipe, and the air delivery pipe is a hose.

[0016] Furthermore, in this embodiment, the gas valve rack is connected to the gas inlet end of the mixed gas inlet pipe through a gas delivery pipe, and a pressure gauge and a ball valve II are provided on the pipeline of the gas delivery pipe.

[0017] Furthermore, in this embodiment, the gas source of the gas valve rack is one or more of natural gas, hydrogen, liquefied petroleum gas, or water gas.

[0018] Furthermore, in this embodiment, the temperature sensor is electrically connected to an electrical control box, and the electrical control box controls the electric control valve based on the detection value of the temperature sensor; the electric control valve is an electric fine-tuning ball valve; wherein dynamic temperature control is set according to the electrical control box to control the amount of gas entering to adjust the temperature rise in the smelting furnace body.

[0019] Compared with the prior art, the present invention has the following beneficial technical effects:

[0020] 1. The temperature inside the furnace can be strictly controlled according to the required heating and insulation curves;

[0021] 2. Temperatures of 350°C and below can be controlled more precisely;

[0022] 3. This earthen fire gun has a simple structure and can greatly reduce the failure rate, thus avoiding the disadvantages of the previously used regenerative burner, which has a long repair time after failure and a rapid drop in the temperature inside the furnace body;

[0023] 4. The original regenerative burner consumed a lot of natural gas and the flame could not be adjusted. This earth fire gun has a uniform flame and consumes less natural gas. Through precise temperature control, when the temperature inside the furnace rises to the set temperature, the size of the electric ball valve can be adjusted automatically, the output of natural gas can be accurately controlled, the firepower can be reduced, and the heat preservation effect can be achieved;

[0024] 5. The temperature control of this earth fire gun is precise and can reach ±5℃. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the structure of the earthen musket after it is placed in the smelting furnace;

[0027] Figure 2 This is a schematic diagram of the structure of the earthen musket;

[0028] Figure 3 Schematic diagram of the air supply module structure.

[0029] Description of reference numerals:

[0030] 1. Smelting furnace body; 11. Burner; 2. Multi-hole jet burner; 21. Multi-hole jet burner I; 22. Multi-hole jet burner II; 23. Multi-hole jet burner III; 2a. Flame hole; 2b. Bracket; 2c. Inlet pipe; 3. Temperature sensor; 4. Mixing air inlet pipe; 5. Air supply module; 6. Compressed air valve rack; 61. Air delivery pipe; 62. Ball valve I; 7. Gas valve rack; 71. Gas delivery pipe; 72. Pressure gauge; 73. Ball valve II; 8. Electric control valve. DETAILED DESCRIPTION

[0031] refer to Figure 1In this embodiment, a lance combustion device for low-temperature uniform furnace baking is disclosed, including three multi-hole jet burners installed in a smelting furnace body 1, a temperature sensor 3 installed in the smelting furnace body 1, a mixing air intake pipe 4 connected to the air intake end of the multi-hole jet burner 2, and an air supply module 5 connected to the mixing air intake pipe 4.

[0032] The three porous jet burners include a porous jet burner I21, a porous jet burner II22, and a porous jet burner III23 installed at different heights in the smelting furnace body 1; wherein the porous jet burner I21, the porous jet burner II22, and the porous jet burner III23 are respectively connected to the compressed air valve rack 6 and the gas valve rack 7 through the mixing air intake pipe 4.

[0033] The air supply module 5 includes a compressed air valve rack 6 and a gas valve rack 7 connected to the mixed intake pipe 4; an electric control valve 8 is installed on the connecting pipeline between the gas valve rack 7 and the mixed intake pipe 4; the temperature sensor 3 is electrically connected to an electrical control box, and the electrical control box controls the electric control valve 8 based on the detection value of the temperature sensor 3; the electric control valve 8 is an electric fine-tuning ball valve; and the mixed intake pipe 4 is made of high-temperature resistant material.

[0034] refer to Figure 2 The multi-hole jet burner 2 includes a bracket 2b for installation in the smelting furnace body 1, a hollow blind pipe installed on the bracket 2b, an air inlet pipe 2c vertically connected to the middle of the hollow blind pipe, and a plurality of flame holes 2a evenly opened on the outer wall of the hollow blind pipe.

[0035] As an embodiment, a plurality of flame-spraying holes 2a are radially opened on the outer wall of the hollow blind tube.

[0036] refer to Figure 3 The compressed air valve holder 6 is connected to the air intake end of the mixed air intake pipe 4 via an air delivery pipe 61, and a ball valve I 62 is installed on the air delivery pipe 61. The air delivery pipe 61 is a flexible hose. The gas valve holder 7 is connected to the air intake end of the mixed air intake pipe 4 via a gas delivery pipe 71, and a pressure gauge 72 and a ball valve II 73 are installed on the gas delivery pipe 71. In specific implementations, the air delivery pipe 61 and the gas delivery pipe 71 are each connected to the mixed air intake pipe 4 via a tee.

[0037] As an embodiment, the gas source of the gas valve rack 7 is one or more of natural gas, hydrogen, liquefied petroleum gas, or water gas; the compressed air valve rack 6 can be supplied with gas through an oxygen tank or a compressed air tank, or directly through an air pump.

[0038] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A fire gun combustion device for low temperature uniform baking furnace, characterized by: The invention comprises at least one multi-hole jet burner provided in a smelting furnace body, at least one temperature sensor provided in the smelting furnace body, a mixed air inlet pipe connected to an air inlet end of the multi-hole jet burner, and an air supply module connected to the mixed air inlet pipe; The air supply module includes a compressed air valve rack and a gas valve rack connected to the mixed air intake pipe; an electric control valve is provided on the connecting pipeline between the gas valve rack and the mixed air intake pipe.

2. The earth-fire gun combustion device for low-temperature uniform baking furnace according to claim 1, characterized in that: The multi-hole jet burner includes a bracket for installation in the smelting furnace body, a hollow blind tube arranged on the bracket, an air inlet pipe vertically connected to the middle of the hollow blind tube, and a plurality of flame holes evenly opened on the outer wall of the hollow blind tube.

3. The earth-fire gun combustion device for low-temperature uniform baking furnace according to claim 2, characterized in that: A plurality of flame-spraying holes are radially opened on the outer wall of the hollow blind tube.

4. The earth-fire gun combustion device for low-temperature uniform baking furnace according to claim 1, characterized in that: Multi-hole jet burner I, multi-hole jet burner II and multi-hole jet burner III are respectively arranged at different height positions in the smelting furnace body; the multi-hole jet burner I, multi-hole jet burner II and multi-hole jet burner III are respectively connected to the compressed air valve rack and the gas valve rack through the mixing air intake pipe.

5. The earth-fire gun combustion device for low-temperature uniform baking furnace according to claim 1, characterized in that: The compressed air valve rack is connected to the air inlet end of the mixed air inlet pipe through an air delivery pipe, and a ball valve I is provided on the pipeline of the air delivery pipe, and the air delivery pipe is a hose.

6. The earth-fire gun combustion device for low-temperature uniform baking furnace according to claim 1, characterized in that: The gas valve rack is connected to the gas inlet end of the mixed gas inlet pipe through a gas delivery pipe, and a pressure gauge and a ball valve II are provided on the pipeline of the gas delivery pipe.

7. The earth-fire gun combustion device for a low-temperature uniform baking furnace according to claim 6, characterized in that: The gas source of the gas valve rack is one or more of natural gas, hydrogen, liquefied petroleum gas, or water gas.

8. The earth-fire gun combustion device for low-temperature uniform baking furnace according to claim 1, characterized in that: The temperature sensor is electrically connected to an electrical control box, and the electrical control box controls the electric control valve based on the detection value of the temperature sensor; the electric control valve is an electric fine-tuning ball valve.

Images