TWI518289B - Air flow control device - Google Patents

Description

Air flow control device

The present invention relates to a combustion control device, and more particularly to a gas flow control device for a combustion furnace.

After the combustion furnace fuel is ignited, the fuel reacts with the oxygen in the air. A fan is conventionally added to blow the wind from the furnace opening into the furnace to promote combustion. Generally, the burner is equipped with a fan, which can increase the intake air to promote combustion, but the airflow is blown from the outside of the furnace to the opening, which is affected by the shape effect, and the oxygen can not be uniformly and fully distributed in the combustion field, so that the conventional addition The combustion-supporting effect of the fan is greatly reduced.

The biomass gasifier is a combustion device that uses biomass materials (branches, leaves, paper, etc.) as fuel for cooking or heating. The furnace body of the gasification furnace comprises an inner barrel and an outer barrel, and the inner barrel serves as a combustion chamber. The high temperature during combustion causes a gasification effect of the raw material, and the gasified gas has flammable gas and non-flammable gas, and is combustible. The main gases are carbon monoxide, hydrogen and methane, and the non-flammable gases are mainly carbon dioxide and nitrogen. Among them, carbon monoxide, hydrogen and methane are quite good fuels. Traditional farmhouses use the output of biomass gasifiers to provide household heat energy, or as a source of household gas fuel, which is a very common technology.

The gasification of the gasifier produces gas, which is affected by the pressure of the external gas field, affecting the gasification output. The conventional gasifier also has a fan installed, which is expected to promote the flow of air. However, the conventional gasifier does not have a flow control design for the flow field flow characteristics, so the ability to produce gasification is limited.

In view of the shortcomings of the conventional technology, the present invention provides a gas flow control device for a combustion furnace and a gasification furnace. Compared with the conventional technology, the present invention has the effect of assisting gasification and also increases the mixing of gas and air. Increase combustion efficiency and reduce black smoke emissions and pollution Health.

The invention provides a gas flow control device, which is used for a combustion furnace, comprising: a casing having a space inside the casing for accommodating air flow, and a side wall of the casing is provided with a plurality of openings, and the sides of the opening are vertically arranged a blocking piece; and an air inlet portion disposed on one side of the housing for guiding air into a space inside the housing, the air inlet portion is provided with a directional valve for controlling the inside of the housing a direction in which the air flows; wherein the airflow flowing in the space is blocked by the baffle into the opening, and the operating state is such that the combustion zone is mixed with fresh air to increase combustion efficiency; if the flow direction is changed, the airflow is subjected to the airflow. The baffle is blocked to create a low pressure zone in front of the opening in the rear of the baffle, which has the effect of guiding the outflow of the vaporized gas. This operating state helps to draw the gas out of the opening and contributes to the gasification effect.

The invention provides a gas flow control device, which is used for a single-layer combustion furnace, comprising: an annular casing having a space for accommodating air flow inside, and a plurality of drainage holes provided in the inner side wall ring of the casing, the diversion a side of the hole is vertically disposed with a blocking piece; and an air inlet portion is disposed on one side of the annular housing for guiding air into the annular housing; wherein air flowing in the space is blocked by the air The sheet is blocked and the flow direction is changed from the flow guiding hole into the combustion chamber. The annular casing has a heat insulating material on the wall surface of the single-layer combustion furnace, and the annular casing can be made of a hard material, or can be made of a soft material, and the cross section can also be made into other shapes as long as it can be combined with a single layer. The air holes of the burner are tightly joined to provide airflow control.

The present invention provides a gas flow control device for a two-layer combustion furnace, comprising: a furnace body having an accommodating space, the side wall ring of the furnace body is provided with a plurality of openings, and the side edges of the opening are vertically disposed. a casing; an outer casing covering the outside of the furnace body, and a space between the furnace body for accommodating air flow; and an air inlet portion disposed on one side of the outer casing for guiding air Entering a space between the furnace body and the outer casing; wherein air flowing in the space is blocked by the baffle, and changing a flow direction enters the furnace body through the opening.

In another preferred embodiment, the double-layer combustion furnace using the air flow control device is provided with a plurality of sound-assisting holes in the central position of the inner side of the inner casing, and the sound-assisting holes allow air to enter the central position of the combustion zone. The addition of fresh oxygen makes the burning zone more evenly burnt.

In another preferred embodiment, the double-layer combustion furnace using the air flow control device has a plurality of bottom holes on the bottom plate of the inner casing, and the air flow control device guides the airflow into the air. The combustion zone agitates the flow field, and the bottom hole allows the air below the bottom plate to enter the combustion zone, so that the combustion zone is supplemented with fresh oxygen to make the combustion temperature uniform; another use of the bottom hole is to allow the burned ash to enter. The space below the inner casing.

In another preferred embodiment, the double-layer combustion furnace using the airflow control device is provided with a pyramidal shaped flame trap at a certain height in the center of the bottom plate of the inner casing, and the flame-retardant system is a metal casing. The interior is filled with aluminum oxide; the flame standing body can absorb heat, so that the combustion field in the central position of the combustion zone is continuously maintained at a high temperature, which contributes to the stable combustion; the design of the flame standing body at a certain height can support the fuel The incoming solid fuel is not excessively compacted and affects combustion; the airflow blown by the airflow control device can be effectively mixed in the combustion zone.

In another preferred embodiment, the double-layer combustion furnace using the airflow control device is covered with a flame arrester above the combustion furnace, the flame arrester is an annular plate, and the center is provided with a downwardly concave flame limiting flame. The guide plate; the combustion flame flows upward, contacts the annular plate of the flame arrester, and is guided downward by the flame limiting guide to flow back to the combustion zone; using the airflow control device, the combustion is more prosperous, the flow field is stirred agitated, and the material is not completely burned. With the flow field of the combustion, it is easy to fly out of the combustion zone, and the flame arrester can effectively reduce the fly ash from leaving the furnace, making the furnace cleaner and more environmentally friendly.

In order to achieve a more stable combustion phenomenon, in another preferred embodiment, a double-layer combustion furnace using a gas flow control device is provided with a height adjusting device below the outer casing, and the flame assisting is adjusted by using a lever or a spiral adjustment. The height of the body, in turn, agitates the solid fuel placed to adjust the combustion state.

In another preferred embodiment, a double-layer combustion furnace using a gas flow control device is provided with an ash discharge device under the outer shell of the furnace, and the ash enters the ash discharge device from a hole below the outer casing, and the bottom of the ash discharge device is slidable. Valves can be manually opened to remove the ash.

In another preferred embodiment, the double-layer combustion furnace using the combustion gas flow control device is provided with a feeding device, and the feeding device is disposed above the outer shell side of the furnace, and is composed of a fuel tank and a conveying pipeline group. The pipe extends into the inner casing of the two-layer furnace, which is fitted with a valve that can be manually opened to allow solid fuel to enter the combustion zone of the inner casing.

In another preferred embodiment, a two-layer combustion furnace using a combustion gas flow control device is provided with a thermocouple power generation device outside the outer casing, and the generated electric power is supplied to the intake portion of the air flow control device.

In another preferred embodiment, a two-layer combustion furnace using a combustion gas flow control device is provided with a thermal power generation device outside the combustion furnace, and the hot gas of the combustion furnace is sent to the thermal power generation device through heat exchange. The thermal power generation device may be a CHP (Cogeneration), a Micro Turbine, a Stirling Engine, a Tesla Engine, or the like, or other thermal power generation device.

In a preferred embodiment, the present invention provides a two-layer environmentally friendly combustion furnace having a gas flow control device, comprising: an inner tub having an accommodating space, and a plurality of flame holes are disposed at a position above the side wall of the inner tub; A plurality of air-assisting holes are disposed at a central position of the side wall of the inner tub, and a plurality of air holes are disposed at a position below the side wall of the inner tub, and a plurality of air holes are vertically disposed on a side of the air inlet hole, and a center of the inner bottom of the inner bucket is provided with a flame holding body The body can maintain high heat, stabilize the combustion flow field in the furnace body, and support the fuel so that the fuel is not excessively dense and affects the combustion state. The bottom plate is provided with a plurality of ring-shaped ash discharge holes; an outer barrel is covered therein. The outside of the barrel has a space for the airflow to flow between the inner tub, and the main air inlet is provided at the side of the outer tub for guiding air into the airflow flow space between the inner tub and the outer tub; The flame device is disposed above the inner tub and is used for guiding a part of the combustion flow field to flow down into the furnace body, thereby reducing fly ash scattered from the furnace body and achieving full combustion; an auxiliary component, including: Upper insulation Disposed above the furnace system; flame stopper portion disposed above the furnace system; lower heat insulating portion, based on the outer side of the outer tub cover; a support portion, is provided on the line below the furnace.

In summary, the present invention provides a gas flow control device which can be applied to a general combustion furnace and a gasification furnace. Compared with the conventional technology, the present invention improves the shortcomings of the conventional technology, and not only assists the gasification effect, but also has It can increase the mixing of gas and air, thereby increasing combustion efficiency and reducing black smoke emissions and pollution. In the process of creation, the invention further finds that the airflow control device is supplemented by the design of the bottom ring, the flame assisting hole, or the flame standing body and the height adjusting device, or the flame arrester, etc., so that the airflow control of the present invention The device's efficacy is more pronounced, burning faster and more complete, and generating more heat. After searching for related patents and products seen in the market, no similar technical ideas were found, and patent applications were filed.

The above summary, the following detailed description and the accompanying drawings are intended to further illustrate the manner, the Other objects and advantages of the present invention will be described in the following description and drawings.

11‧‧‧ Inner layer

111‧‧‧ vent

112‧‧‧Block

12‧‧‧Outer body

13‧‧‧Intake Department

131‧‧‧ Directional selection valve

21‧‧‧Single layer burner

211‧‧‧vents

22‧‧‧Circular housing

31‧‧‧ furnace body

32‧‧‧Outer casing

33‧‧‧floor

331‧‧‧ hole

34‧‧‧The flame body

341‧‧‧ Height adjustment device

35‧‧‧ flame arrester

351‧‧‧Restricted flame guide

36‧‧‧ Ash discharge device

361‧‧‧ Ash Handle

362‧‧‧Drain gate

363‧‧‧ ash hole

37‧‧‧Feeding device

371‧‧‧ fuel storage

372‧‧‧fuel delivery pipe

373‧‧‧ Feed gate

4‧‧‧ burning furnace

41‧‧‧ thermocouple generator

42‧‧‧fan

43‧‧‧ heat exchanger

44‧‧‧Thermal power generation unit

51‧‧‧ inner barrel

511‧‧‧flame hole

512‧‧‧Helper hole

513‧‧‧Air intake

514‧‧ ‧Flap

52‧‧‧floor

521‧‧‧ Flames

522‧‧‧ ash hole

53‧‧‧Outer barrel

531‧‧‧Main air intake

54‧‧‧ flame arrester

55‧‧‧Insulation Department

56‧‧‧ Flame Department

57‧‧‧Under the thermal insulation department

58‧‧‧Support

1 is a schematic view of the technical idea of the airflow control device of the present invention.

2 is a schematic view showing the relative position of the blocking piece and the air hole.

Figure 3 is a structural view of the air flow control device of the present invention.

Fig. 4 is a structural view of a two-layer combustion furnace having a gas flow control device to which an embodiment of the present technology is applied.

Figure 5 is a block diagram of a floor that can be applied to various furnaces.

Fig. 6 is a view showing a structure of a flame standing body which can be applied to various combustion furnaces.

Figure 7 is a structural diagram of a flame arrester that can be applied to various combustion furnaces.

Fig. 8 is a structural view of a selection valve which can be applied to the inlet portions of various combustion furnaces.

Figure 9 is a structural view of a ash discharge device that can be applied to the bottom of various burners.

Figure 10 is a structural view of a feeding device that can be applied to various combustion furnaces.

Figure 11A is a schematic illustration of a burner system employing another embodiment of the present technology.

Figure 11B is a schematic view of a combustion furnace thermal power generation system to which another embodiment of the present technology is applied.

Figure 12 is a structural view of a gas flow control environmentally friendly combustion furnace to which the technique of the present invention is applied.

The embodiments of the present invention are described below by way of specific examples, and those skilled in the art can readily appreciate other advantages and functions of the present invention from the disclosure herein.

1 is a schematic view of the technical idea of the airflow control device of the present invention, comprising: an inner layer body 11; an outer layer body 12 having a space for accommodating air flow between the inner layer body and the outer layer body, the inner layer body The side wall is provided with a plurality of air holes 111. The air holes 13 are vertically disposed with a blocking piece 112. An air inlet portion 13 is disposed on one side of the outer layer body for guiding air into the space inside the airflow control device. The air intake portion is provided with a direction selection valve 131 for controlling the direction of air flow in the air flow control device; wherein air flowing in the space is blocked by the blocking piece, changing the flow direction from the opening, or The airflow is blocked by the baffle into the air hole, and the operating state is to increase the combustion zone to mix with the fresh air, thereby increasing the combustion efficiency; The flow direction causes the airflow to be blocked by the baffle, thereby creating a low pressure zone in front of the air vent behind the baffle, producing an effect of directing the outflow of the vaporized gas, which is beneficial to the gasification effect.

2 is a schematic view showing the relative position of the blocking piece and the air hole. The position of the blocking piece 112 is on the side of the air hole 111, and the left side or the right side of the air hole does not affect its function. When the air flow is blocked by the blocking piece, the operation is blocked. The state has the function of increasing the mixing of the combustion zone with the fresh air, thereby increasing the combustion efficiency; when the airflow is blocked by the baffle, a low pressure zone is generated behind the baffle and in front of the air vent, thereby generating an effect of guiding the outflow of the gas. The operating state helps to extract the airflow and contributes to the gasification effect. After many analyses and tests, when the pore diameter of the pore is D, the preferred distance between the flap and the pore is 0.3D~0.8D. The preferred range of the aspect ratio of the blank is (1.7D~2.3D): (1.3D~1.8D).

3 is a structural view of a gas flow control device according to the present invention. The air flow control device is used in a single-layer combustion furnace 21, and includes an annular casing 22 having a space for accommodating air flow and a side wall ring of the casing. a plurality of air holes 111 are disposed, the air hole side is vertically disposed with a blocking piece; and an air inlet portion 13 is disposed on one side of the annular housing for guiding air into the annular housing; The air in the space is blocked by the baffle, and the flow direction is changed from the air hole into the combustion chamber of the combustion furnace; the annular casing has a heat insulating material on the wall surface of the single-layer combustion furnace, and the annular casing can be made of a hard material. It can also be made of a soft material, and its cross section can be made into other shapes. As long as it can be closely engaged with the vent hole 211 of the single-layer combustion furnace, it can have a function of air flow control.

4 is a structural diagram of a two-layer combustion furnace having a gas flow control device according to an embodiment of the present invention. The double-layer combustion furnace includes a furnace body 31 having an accommodation space and a side wall ring of the furnace body. a plurality of air holes 111, the side of the opening is vertically disposed with a baffle; an outer casing 32 is wrapped around the outside of the furnace body, and has a space for accommodating air flow between the furnace body; The air inlet portion 13 is provided with a direction selection valve 131 for guiding air into the space between the furnace body and the outer casing; wherein the air flowing in the space flows therein Blocked by the baffle, the flow direction is changed to enter the furnace body through the opening, and a venturi effect is generated at the baffle to accelerate the discharge of combustion gas inside the furnace body.

Figure 5 is a structural view of a bottom plate 33 that can be applied to various combustion furnaces. A plurality of holes 331 are provided, and the results of the repeated tests are currently performed in a range of 2 to 4 rows, and the angle of the holes relative to the center of the circle is preferably between 15 and 23 degrees; 6 is a structural view of a flame-assisting body 34 applicable to various combustion furnaces. The flame-retardant system is disposed at a certain height in the center of the inner side of the furnace body 31 to maintain high heat and stabilize the combustion flow field in the furnace body. The fuel is raised so that the fuel is not excessively dense and affects the combustion state; a height adjusting device 341 is disposed under the furnace body, and the height adjusting device is used to adjust the height of the flame-assisting body.

Figure 7 is a structural view of a flame arrester 35 that can be applied to various burners. The flame limiter is disposed above the furnace body 31. The flame limiter is an annular plate having a downwardly concave flame-limited guide at the center. The plate 351, when the combustion flame flows upwardly to contact the flame arrester, is then guided downward by the flame limiting guide to flow back to the combustion zone; the flame arrester can effectively reduce the fly ash from leaving the furnace, making the combustion furnace cleaner and more environmentally friendly.

Figure 8 is a structural view of a direction selection valve 131 applicable to the inlet portion 13 of various burners, the direction selection valve having a manually-operated direction lever 1311 for turning the internal valve body opening to the left air outlet 1312 or The right air outlet 1313 allows the incoming airflow to flow in a clockwise or counterclockwise direction.

Figure 9 is a structural view of an ash discharge device 36 that can be applied to the bottom of various combustion furnaces, the ash discharge device is a hollow housing above, and the burned ash is dropped into the ash discharge device, the ash discharge device has A row of gray handles 361 are connected to a row of gray gates 362, and the gray discharge handles are pulled to drive the gray discharge gates to expose the gray discharge holes 363 to discharge the ash.

10 is a structural view of a feeding device 37 that can be applied to various types of combustion furnaces, including a fuel tank 371, a fuel delivery pipe 372, and a feed gate 373 that is pulled to allow fuel to fall into the furnace.

11A is a schematic diagram of a combustion furnace system to which another embodiment of the present technology is applied, wherein the combustion furnace 4 can be attached with a thermocouple power generation device 41 to convert the heat of the combustion furnace into electric power, and then provide a fan 42 for use; 11B is a schematic diagram of a combustion furnace thermal power generation system to which another embodiment of the present technology is applied. The combustion furnace 4 generates hot gas output to a heat exchanger 43 and then to a thermal power generation device 44, which generates electric power reflow. The fan 42 provided to the burner is used, or the electric power is converted to other uses; the thermal power generation device includes CHP (cogeneration), micro vortex Micro Turbine, Stirling Engine, Tesla Turbine or other thermal power generation devices, etc. Currently, the above-mentioned thermal power generation devices have ready-made products that can be directly applied.

12 is a structural diagram of a gas flow control environment-friendly combustion furnace to which the present invention is applied, and includes an inner tub, an outer tub, a air flow control device, and the like, as shown in the figure, including: an inner tub 51 having an accommodation space. A plurality of flame holes 511 are disposed at a position above the sidewall of the inner tub, and a plurality of flame-assisted holes 512 are disposed at a central position of the sidewall of the inner tub, and a plurality of air inlet holes 513 are disposed at a position below the sidewall of the inner tub, and the sides of the air inlet are vertically disposed. a blocking piece 514, a flame standing body 521 is disposed at a central position of the bottom plate 52 of the inner barrel, which can maintain high heat, stabilize the combustion flow field in the furnace body, and support the fuel, so that the fuel is not excessively dense and affects the combustion state; The ash hole 522 is disposed on the bottom plate; the outer tub 53 is wrapped around the outer tub, and has a space for accommodating air flow between the inner tub; the main air inlet 531 is disposed at the bottom The side of the outer tub is for guiding air into the space between the inner tub and the outer tub; the flame arrester 54 is disposed above the inner tub for guiding a part of the combustion flow field to flow into the furnace body. , can reduce the fly ash scattered from the furnace body, up to For the purpose of full combustion; the auxiliary component includes a heat insulating portion 55 disposed above the furnace body, a flame shield portion 56 disposed above the furnace body, and a heat insulating portion covering the outer side of the outer tub 57 and a support portion 58 disposed under the furnace body.

The above-described embodiments are merely illustrative of the features and functions of the present invention, and are not intended to limit the scope of the technical scope of the present invention. Modifications and variations of the above-described embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as set forth in the scope of the claims described below.

11‧‧‧ Inner layer

111‧‧‧ vent

112‧‧‧Block

12‧‧‧Outer body

13‧‧‧Intake Department

131‧‧‧ Directional selection valve

Claims (12)

The utility model relates to a gas flow control device, which is used for a single-layer combustion furnace, comprising: an annular casing having a space for accommodating air flow inside, and a plurality of drainage holes are arranged on the inner side wall ring of the casing, and the side of the drainage hole is a blocking piece is disposed vertically; and an air inlet portion is disposed on one side of the annular casing for guiding air into the annular casing; wherein air flowing in the space is blocked by the blocking piece, and is changed The flow direction flows from the flow guiding orifice into the combustion chamber. A double-layer combustion furnace having a gas flow control device, comprising: a furnace body having an accommodating space, the side wall ring of the furnace body is provided with a plurality of openings, the side edges of the opening are vertically disposed with a blocking piece; Covering the outside of the furnace body, having a space for accommodating air flow between the furnace body; and an air inlet portion disposed on one side of the outer casing for guiding air into the furnace body and the a space between the outer casings; wherein air flowing in the space is blocked by the baffle, and the flow direction is changed to enter the furnace body through the openings. The double-layer combustion furnace according to claim 2, wherein the bottom of the furnace body is provided with a plurality of bottom holes. The double-layer combustion furnace of claim 2, wherein the central portion of the side wall of the furnace body is provided with a plurality of auxiliary air holes. The double-layer combustion furnace according to claim 2, wherein a flame standing body is disposed on the inner bottom of the furnace body. The double-layer burning furnace according to claim 5, wherein a height adjusting device is disposed under the furnace body for adjusting the height of the flame standing body. The double-layer combustion furnace of claim 2, wherein a flame arrester is disposed above the furnace body. The double-layer combustion furnace of claim 2, wherein the bottom of the furnace body is provided with a ash discharge portion, and the ash discharge portion has a gate that can be manually opened and closed. The double-layer burning furnace according to claim 2, wherein the combustion furnace is connected to a thermoelectric Even power generation unit. The double-layer combustion furnace according to claim 2, wherein the combustion furnace generates hot gas output to a heat exchanger, and then supplies the same to a thermal power generation device including CHP (cogeneration) and micro Micro Turbine, Stirling Engine, Tesla Turbine or other thermal power plants. The double-layer burning furnace according to claim 2, wherein a feeding device is disposed above the burning furnace. A gas flow control environment-friendly combustion furnace comprising: a double-layer combustion furnace having a gas flow control device as described in claim 2, comprising a furnace body, an outer casing and an air inlet portion, the furnace system having an accommodation space A plurality of flame holes are disposed at a position above the sidewall of the furnace body, and a plurality of flame-assisted holes are disposed at a central position of the sidewall of the furnace body, and a plurality of air inlet holes are disposed at a position below the sidewall of the furnace body, and a side of the air inlet hole is vertically disposed. a flame-retardant body is disposed at a central position of the bottom plate of the furnace body, and the outer casing system is coated on the outer side of the furnace body, and the outer casing body and the furnace body have a space for accommodating air flow, and the air intake system is disposed On the side of the outer casing, the air inlet portion is used to guide air into the space between the furnace body and the outer casing; a flame arrester is disposed above the furnace body for guiding part of the combustion flow field Flowing down into the furnace body, reducing the fly ash scattered from the furnace body for the purpose of full combustion; an auxiliary component comprising a heat insulating portion disposed above the furnace body and a block disposed above the furnace body Flame part, one covered in the a heat insulating portion under the outer side of the outer tub and a support portion disposed under the furnace body.