Gas treatment apparatus and gas treatment method

Abstract

The present invention provides a gas treatment apparatus and a gas treatment method using the same, which can burn gas and eliminate smoke and odor while maintaining an appropriate ambient temperature. [Solution] This gas treatment device 1 comprises a combustion tube 2 whose axis C is arranged along the vertical direction, a burner 3 positioned directly below the combustion tube 2 and ejecting an upward combustion flame to the lower part of the combustion tube, a gas supply tube 4 that supplies gas to the lower part of the combustion tube 2, and an insulating tube 5 that is concentric with the combustion tube 2 and positioned on the outer circumference of the combustion tube. An insulating space S with an open lower end is formed between the combustion tube 2 and the insulating tube 5.

Description

Technical Field

[0001] The present invention relates to a gas processing apparatus and a gas processing method, and more specifically, to a gas processing apparatus that combusts gas generated when heating an object to be heated to eliminate smoke and deodorize, and a gas processing method using the same.

Background Art

[0002] In recent years, food heating apparatuses such as rotary kiln type for heating food have been proposed (see, for example, Patent Document 1). This type of food heating apparatus is required to eliminate smoke and deodorize by combusting the gas (smoke) generated during heating. Here, for example, Patent Documents 2 and 3 describe, as a technique for eliminating smoke and deodorizing by combusting gas, an apparatus including a combustion pipe arranged such that its axial center extends along the vertical direction, a burner arranged directly below the combustion pipe to eject an upward combustion flame to the lower part of the combustion pipe, and a gas supply passage part for supplying gas to the lower part of the combustion pipe.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problem to be Solved by the Invention

[0004] However, in the techniques described in Patent Documents 2 and 3, radiant heat is released to the outside of the combustion pipe during gas combustion, causing the ambient temperature around the combustion pipe to rise to a high level. As a result, the environmental temperature tends to become undesirable for the operator of the apparatus and the like.

[0005] This invention has been made in view of the above-mentioned circumstances, and aims to provide a gas treatment apparatus and a gas treatment method using the same that can burn gas and eliminate smoke and odor while maintaining an appropriate ambient temperature. [Means for solving the problem]

[0006] The present invention is as follows: 1. A gas treatment device that burns the gas generated when heating an object to be heated to eliminate smoke and odor, A combustion tube is positioned so that its axis aligns vertically, A burner positioned directly below the combustion tube and ejecting an upward-facing combustion flame to the lower part of the combustion tube, A gas supply pipe that supplies gas to the lower part of the combustion pipe, The system comprises a heat insulating pipe concentric with the combustion pipe and positioned on the outer circumference of the combustion pipe, A gas processing apparatus characterized in that an insulating space with an open lower end is formed between the combustion tube and the insulating tube. 2. The gas treatment apparatus according to 1. above, wherein the gas supply pipe has an opening that faces upward into the combustion pipe. 3. A gas exhaust pipe connected to the upper end of the insulated pipe and exhausting gas in a direction intersecting the axis of the insulated pipe, The gas treatment apparatus according to 1., further comprising a blower that supplies cooling air into the gas exhaust pipe. 4. A first temperature measuring unit for measuring the gas temperature inside the combustion tube, A first display unit that displays the measured value of the first temperature measuring unit, A second temperature measuring unit for measuring the gas temperature inside the gas exhaust pipe, The gas apparatus according to 3. further comprising a second display unit for displaying the measured value of the second temperature measuring unit. 5. The gas treatment apparatus according to 4., further comprising an airflow adjustment unit capable of adjusting the airflow of an intake fan that supplies air to the burner. 6. A gas treatment method characterized by burning gas using a gas treatment device described in any one of items 1 to 5 above to eliminate smoke and odor. Furthermore, the phrase "to eliminate smoke and odor by burning gas" above means to burn the gas to eliminate or reduce smoke and to eliminate or reduce odor. [Effects of the Invention]

[0007] According to the present invention, it is possible to burn gas while maintaining an appropriate ambient temperature to eliminate smoke and odor. [Brief explanation of the drawing]

[0008] The present invention will be further described in the following detailed description with reference to the drawings, which refer to several drawings, with the same reference numerals indicating the same parts in several of the drawings. [Figure 1] This is a side view of the gas treatment apparatus according to the embodiment. [Figure 2] This is a longitudinal cross-section of the gas treatment device. [Figure 3] Figure 2 is a magnified view of the main part, where (a) shows the part including the gas exhaust pipe and (b) shows the part including the gas supply pipe. [Figure 4] This is a diagram illustrating the operation of a gas treatment device. [Figure 5] This is a cross-sectional view of the main part of a gas treatment apparatus according to another embodiment. [Modes for carrying out the invention]

[0009] The matters presented herein are illustrative and illustrative to illustrate embodiments of the present invention, and are intended to provide what is considered to be the most effective and readily understandable explanation of the principles and conceptual features of the present invention. In this regard, it is not intended to show structural details of the present invention beyond what is necessary for a fundamental understanding of the invention, and the description, in conjunction with the drawings, will make it clear to those skilled in the art how some forms of the present invention are actually embodied.

[0010] Hereinafter, the present invention will be specifically described by way of embodiments with reference to the drawings. In the present embodiment, as the "gas treatment device" according to the present invention, a gas treatment device 1 for eliminating smoke and deodorizing gas (smoke) generated when heating food (for example, sesame, spices (for example, cumin, coriander, etc.), wheat flour, buckwheat flour, rice, coffee beans, soybeans, nuts, vegetables, fish meal, etc.) (for example, roasting, drying, sterilization, puffing, etc.) is illustrated (see Figure 1). However, the gas treatment device 1 may also be used to eliminate smoke and deodorize gas generated when heating objects to be heated other than food (for example, cement, industrial waste, etc.).

[0011] As shown in Figure 1 and Figure 2, the gas treatment device 1 of the present embodiment includes a combustion pipe 2 arranged such that its axis C extends along the vertical direction (i.e., the perpendicular direction), a burner 3 arranged directly below the combustion pipe 2 for ejecting an upward combustion flame F to the lower part of the combustion pipe 2, a gas supply pipe 4 for supplying gas G to the lower part of the combustion pipe 2, and a heat insulating pipe 5 arranged concentrically with the combustion pipe 2 on the outer peripheral side of the combustion pipe 2. Furthermore, the gas treatment device 1 is provided with a frame 7 formed by framing vertical struts 7a arranged in the perpendicular direction and horizontal struts 7b arranged in the horizontal direction.

[0012] The combustion pipe 2 is a straight metal pipe having a predetermined outer diameter (for example, about 90 mm). The lower end of the combustion pipe 2 is attached to the frame 7 by screwing or the like.

[0013] The burner 3 is attached to the frame 7 by screwing or the like. Further, an intake fan 13 for supplying air and a gas supply unit 14 for supplying fuel gas (for example, propane gas, city gas, etc.) are connected to the burner 3. When the burner 3 misfires and extinguishes, the supply of fuel gas is stopped by a safety device (not shown).

[0014] The gas supply pipe 4 has an opening portion 4b that faces the inside of the combustion pipe 2 and opens upward (see Fig. 3(b)). Specifically, the gas supply pipe 4 has a tubular horizontal pipe portion 4a whose axis extends along the horizontal direction, and a substantially L-shaped opening portion 4b connected to a constricted portion 4c on the distal end side of the horizontal pipe portion 4a. The opening portion 4b has an outer diameter (for example, about 48 mm) smaller than the outer diameter of the combustion pipe 2. Further, the gas supply pipe 4 (specifically, the opening portion 4b) is attached to the lower part of the combustion pipe 2 by welding or the like.

[0015] The heat insulating pipe 5 is a straight metal pipe, and has a predetermined outer diameter (for example, about 156 mm) larger than the outer diameter of the combustion pipe 2. The heat insulating pipe 5 is integrated with the combustion pipe 2 by screwing or the like. Further, the heat insulating pipe 5 is arranged such that its upper end is at substantially the same height as the upper end of the combustion pipe 2, and its lower end is positioned higher than the lower end of the combustion pipe 2.

[0016] Between the combustion pipe 2 and the heat insulating pipe 5, a heat insulating space S whose lower end is open to the outside is formed. The heat insulating space S is a cylindrical space surrounded by the outer peripheral surface of the combustion pipe 2 and the inner peripheral surface of the heat insulating pipe 5. The upper end of the heat insulating space S communicates with a gas exhaust pipe 16 described later.

[0017] The gas treatment apparatus 1 further includes: a gas exhaust pipe 16 connected to the upper end portion of the heat insulating pipe 5 for exhausting the combusted gas G (see Fig. 4) in a direction intersecting the axis C of the heat insulating pipe 5 (specifically, the horizontal direction); and a blower 19 (for example, a blower blower, a fan, etc.) that sends cooling air W (see Fig. 4) into the gas exhaust pipe 16 (see Fig. 3(a)).

[0018] The gas exhaust pipe 16 is formed in a roughly T-shape. Specifically, the gas exhaust pipe 16 has a roughly cylindrical horizontal pipe section 16a whose axis is aligned horizontally, and a connecting pipe section 16b provided in the axial middle of the horizontal pipe section 16a and connected to the upper end of the insulated pipe 5. The axis of the horizontal pipe section 16a and the axis of the connecting pipe section 16b are perpendicular to each other. The connecting pipe section 16b has an outer diameter that allows it to be inserted into the upper end of the insulated pipe 5 with a small amount of play. The gas exhaust pipe 16 is connected to the upper end of the insulated pipe 5 by screws or the like when the connecting pipe section 16b is inserted into the upper end of the insulated pipe 5. By removing the gas exhaust pipe 16 from the insulated pipe 5, each pipe 16, 2, 5 and the temperature measuring sections 21, 22 described later can be maintained.

[0019] The blower 19 is attached to the frame 7 via a bracket using screws or the like. The blower 19 is positioned so that its air outlet faces one end opening of the horizontal section 16a of the gas exhaust pipe 16. In other words, the blower 19 is positioned to blow cooling air into the horizontal section 16a of the gas exhaust pipe 16.

[0020] The gas treatment device 1 further includes a first temperature measuring unit 21 for measuring the gas temperature inside the combustion tube 2 (specifically, the gas temperature inside the upper part of the combustion tube 2), a first display unit 31 for displaying the measurement value from the first temperature measuring unit 21, a second temperature measuring unit 22 for measuring the gas temperature inside the gas exhaust pipe 16 (specifically, the gas temperature downstream of the connection point between the horizontal pipe section 16a and the connecting pipe section 16b), and a second display unit 32 for displaying the measurement value from the second temperature measuring unit 22. For each temperature measuring unit 21 and 22, for example, thermocouples can be used. For each display unit 31 and 32, for example, a seven-segment display or a liquid crystal display can be used.

[0021] The first temperature measuring unit 21 is attached to the upper end of the insulated pipe 5 by screw fastening or the like, and its measuring probe faces into the combustion pipe 2. The second temperature measuring unit 22 is attached to the frame 7 by screw fastening or the like, and its measuring probe faces into the gas exhaust pipe 16. As shown in Figure 1, the first display unit 31 and the second display unit 32 are provided on the control panel 11 for driving and controlling the gas treatment device 1.

[0022] The control panel 11 is attached to the frame 7 by screws or the like. The control panel 11 is equipped with a power switch 33 for turning the power on and off, an ignition switch 34 for igniting the burner 3, an ignition lamp 35 for indicating the ignition of the burner 3, a warning lamp 36 for warning of abnormalities such as flame failure, and an airflow adjustment unit 37 for adjusting the airflow of the intake fan 13. The frame 7 is also attached by screws or the like to a cover 8 that surrounds the outer circumference of the insulated pipe 5 and a cover 9 that covers the gas exhaust pipe 16.

[0023] Next, the operation and effects of the gas treatment device 1 with the above configuration will be explained. As shown in Figure 4, the blower 19 supplies cooling air W into the gas exhaust pipe 16, and the intake fan 13 and gas supply unit 14 supply air and fuel gas to the burner 3, igniting the burner 3 and blowing an upward combustion flame F out to the bottom of the combustion pipe 2. From this state, the gas (smoke) G generated when heating food in the food heating device 41 is supplied to the bottom of the combustion pipe 2 by the gas supply pipe 4. The supplied gas G is then burned (secondary combustion) by the combustion flame F at an appropriate combustion temperature (for example, 500°C to 800°C), and the smoke and odor are eliminated. After combustion, the gas G is sent to the top of the combustion pipe 2 by the rising airflow and flows into the gas exhaust pipe 16, where it is cooled to an appropriate exhaust temperature (for example, about 120°C) by the cooling air W of the blower 19 and exhausted to the outside. Furthermore, the heated air A within the insulated space S flows into the gas exhaust pipe 16 due to the rising airflow, is cooled by the cooling air W, and is exhausted to the outside. Meanwhile, new air A is drawn into the insulated space S from its lower end.

[0024] As described above, the gas treatment device 1 of this embodiment comprises a combustion tube 2 whose axis C is arranged along the vertical direction, a burner 3 positioned directly below the combustion tube 2 and ejecting an upward combustion flame F to the lower part of the combustion tube 2, a gas supply tube 4 that supplies gas G to the lower part of the combustion tube 2, and an insulating tube 5 positioned concentrically with the combustion tube 2 on the outer circumference of the combustion tube 2, with an insulating space S formed between the combustion tube 2 and the insulating tube 5, with the lower end open. As a result, when gas G is burned, the transfer of radiant heat to the surroundings of the combustion tube 2 is suppressed by the insulating space S and the insulating tube 5. Therefore, gas G can be burned and smoke and odor removed while maintaining an appropriate ambient temperature.

[0025] Furthermore, in this embodiment, the gas supply pipe 4 has an opening 4b that faces upward into the combustion pipe 2. As a result, the gas G supplied into the combustion pipe 2 is smoothly drawn into the upward combustion flame F, and backflow into the opening 4b is suppressed. Therefore, the gas G can be effectively burned to eliminate smoke and odor.

[0026] Furthermore, this embodiment includes a gas exhaust pipe 16 connected to the upper end of the insulated pipe 5 and exhausting gas G in a direction intersecting the axis C of the insulated pipe 5, and a blower 19 that sends cooling air W into the gas exhaust pipe 16. This allows the gas G after combustion to be cooled and the exhaust temperature to be lowered, thereby enabling the maintenance of a more appropriate ambient temperature.

[0027] Furthermore, this embodiment includes a first temperature measuring unit 21 for measuring the gas temperature inside the combustion pipe 2, a first display unit 31 for displaying the measured value from the first temperature measuring unit 21, a second temperature measuring unit 22 for measuring the gas temperature inside the gas exhaust pipe 16, and a second display unit 32 for displaying the measured value from the second temperature measuring unit 22. This makes it possible to easily determine the ambient temperature based on the combustion temperature and / or exhaust temperature of the gas G.

[0028] Furthermore, this embodiment further includes an airflow adjustment unit 37 that can adjust the airflow of the intake fan 13 that supplies air to the burner 3. By adjusting the airflow of the airflow adjustment unit 37, the amount of air supplied to the burner 3 is adjusted, thereby changing the combustion temperature of the gas G and maintaining a more appropriate ambient temperature.

[0029] Furthermore, the present invention is not limited to the above embodiments, and various modified embodiments can be made within the scope of the present invention depending on the purpose and application. That is, in the above embodiments, a gas supply pipe 4 with its tip (mouth portion 4b) facing into the combustion pipe 2 was illustrated, but the invention is not limited to this, and for example, as shown in Figure 5, a gas supply pipe 4 may be provided whose tip does not face into the combustion pipe 2 but communicates with the combustion pipe 2.

[0030] Furthermore, although the above embodiment illustrates a gas exhaust pipe 16 that exhausts the burnt gas G in a horizontal direction, it is not limited to this, and for example, the gas exhaust pipe 16 may exhaust the burnt gas G in a direction inclined at a predetermined angle (for example, an angle of 45 degrees or less) with respect to the horizontal direction.

[0031] Furthermore, although the above embodiment illustrates a gas exhaust pipe 16 having a connecting pipe portion 16b that is inserted into the upper end of the insulated pipe 5, the invention is not limited to this, and for example, a gas exhaust pipe 16 having a connecting pipe portion 16b that is externally fitted to the upper end of the insulated pipe 5 may also be used.

[0032] Furthermore, although the above embodiment illustrates a gas exhaust pipe 16 that is detachably connected to the insulated pipe 5, the invention is not limited to this, and for example, an external gas pipe 16 that is not detachably connected to the insulated pipe 5 by welding or the like may also be used.

[0033] Furthermore, although the above embodiment illustrates a configuration that includes a gas exhaust pipe 16 and a blower 19, it is not limited to this, and for example, a configuration in which the upper end of the heat-insulating space S is open to the outside may be used without a gas exhaust pipe 16 and a blower 19. [Explanation of Symbols]

[0034] 1; Gas treatment device 2; Combustion pipe 3; Burner 4; Gas supply pipe 4b; opening 5; insulated pipe 13; Intake fan 16; Gas exhaust pipe 19;Blower 21;1st temperature measurement section 22;Second temperature measuring section 31;First display section 32;Second display section 37;Air volume adjustment section C: Axis of the combustion tube F: Combustion flame G: Gas S: Insulated space W; Cooling air

Claims

1. A gas treatment device that burns the gas produced when heating an object to be heated to eliminate smoke and odor, A combustion tube is positioned so that its axis aligns vertically, A burner positioned directly below the combustion tube and ejecting an upward-facing combustion flame to the lower part of the combustion tube, A gas supply pipe that supplies gas to the lower part of the combustion pipe, The system comprises a heat insulating pipe concentric with the combustion pipe and positioned on the outer circumference of the combustion pipe, A gas processing apparatus characterized in that an insulating space with an open lower end is formed between the combustion tube and the insulating tube.

2. The gas treatment apparatus according to claim 1, wherein the gas supply pipe has an opening that faces upward into the combustion pipe.

3. A gas exhaust pipe connected to the upper end of the insulated pipe and exhausting gas in a direction intersecting the axis of the insulated pipe, The gas treatment apparatus according to claim 1, further comprising a blower that supplies cooling air into the gas exhaust pipe.

4. A first temperature measuring unit for measuring the gas temperature inside the combustion tube, A first display unit that displays the measured value of the first temperature measuring unit, A second temperature measuring unit for measuring the gas temperature inside the gas exhaust pipe, The gas apparatus according to claim 3, further comprising a second display unit for displaying a measurement value from the second temperature measuring unit.

5. The gas processing apparatus according to claim 4, further comprising an airflow adjustment unit capable of adjusting the airflow of an intake fan that supplies air to the burner.

6. A gas treatment method characterized by burning gas using a gas treatment device described in any one of claims 1 to 5 to eliminate smoke and odor.

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