JP6793389B2 - Superheated steam supply unit - Google Patents

Description

The present invention relates to a superheated steam supply unit that is attached to a superheated steam utilization furnace and supplies superheated steam into the furnace.

Conventionally, as a device for supplying superheated steam to a superheated steam utilization furnace, as shown in Patent Document 1, a voltage is applied to electrodes connected to both ends of the conductor tube to energize and heat the conductor tube. Some of them heat the steam flowing through the water vapor to generate superheated steam.

In this superheated steam generator, a conductor tube is installed in a bare state inside a superheated steam utilization furnace, and the superheated steam is supplied into the furnace from a superheated steam outlet formed in the conductor tube. There is.

However, in the above configuration, since the conductor tube is installed at least inside the superheated steam utilization furnace in an exposed state, the user replaces the object to be processed in the superheated steam utilization furnace or maintains the inside of the superheated steam utilization furnace . In some cases, the conductor tube or electrodes may be touched unexpectedly, resulting in burns, electric shock, or sparks.

Further, in the above-mentioned superheated steam supply device, it is necessary to design a heat insulating structure or an insulating structure dedicated to the superheated steam used furnace after the connection between the superheated steam used furnace and the conductor pipe is decided in practice. is there. Since the superheated steam utilization furnace to be used is determined by the user's specifications, it is necessary to individually design the corresponding conductor tube configuration. For these reasons, the superheated steam generator having the above configuration is not easy to handle and is inconvenient for the user.

JP 2015-83913

Therefore, the present invention has been made to solve the above problems, and it is not necessary to design a dedicated heat insulating structure and insulating structure for the specifications of the superheated steam utilization furnace, and it is easy to handle and convenient for the user. Its main task is to provide a superheated steam supply unit with improved properties.

That is, the superheated steam supply unit according to the present invention is a superheated steam supply unit that is attached to a superheated steam utilization furnace to supply superheated steam into the furnace, and is a flow made of a conductive material having a flow path formed inside. The path forming body, the first electrode connected to one end side of the flow path of the flow path forming body, the second electrode connected to the other end side of the flow path of the flow path forming body, and the flow path forming. A housing for accommodating the body and each of the electrodes, an external power supply provided in the housing, and a power supply connection portion to which the electrodes are connected, and a housing provided in the housing, the flow A steam introduction unit that introduces steam into the path, a superheated steam derivation unit that is provided in the housing and derives superheated steam from the flow path, and a superheated steam derivation unit that is provided inside the housing and is provided from the flow path forming body. It is characterized by being provided with a heat insulating member that blocks the heat of the water vapor.

In such a superheated steam supply unit, since the flow path forming body and each electrode that become hot due to energization heating are housed in the housing, there is no possibility that the user unexpectedly touches the flow path forming body and each electrode. .. Further, since the heat insulating member is provided inside the housing, there is no risk of burns even if the user touches the housing. Further, since the flow path forming body and each electrode are housed in the housing, the insulation treatment can be performed inside the housing, and the flow path forming body and each electrode can be touched to cause an electric shock and the flow path forming body. Alternatively, sparks from the electrodes can be prevented. Furthermore, since it is unitized by a housing and this unit is configured to be attached to a superheated steam-using furnace, it is necessary to design a dedicated heat insulating structure and insulating structure for the specifications of the superheated steam-using furnace. It is easy to handle, and the convenience of the user can be improved.

In order to reduce the distance between the superheated steam supply unit and the superheated steam utilization furnace as much as possible and shorten the piping between them, the housing has a mounting surface portion to be attached to the superheated steam utilization furnace. It is desirable to do. Here, it is desirable that the mounting surface portion is directly mounted on the side wall of the superheated steam utilization furnace.

In order to eliminate the need for piping between the superheated steam supply unit and the superheated steam utilization furnace, the housing is externally attached to the superheated steam utilization furnace, and the superheated steam lead-out unit is attached. It is desirable that it is provided on the surface. In this case, a superheated steam passing portion (opening) corresponding to the superheated steam leading-out portion of the superheated steam supply unit is formed in the unit mounting portion in the superheated steam utilization furnace.
With the configuration in which the superheated steam supply unit is externally attached to the superheated steam utilization furnace in this way, the user can design the inside of the superheated steam utilization furnace without considering the space of the superheated steam supply unit.

In order to efficiently supply superheated steam over a wide range as much as possible with the superheated steam supply unit mounted on the superheated steam utilization furnace, it is desirable that a plurality of the superheated steam out-licensing portions are provided on the mounting surface portion.

It is desirable that the housing has a side wall portion formed at a position different from that of the mounting surface portion, and the water vapor introduction portion is provided on the side wall portion.
With this configuration, the steam introduction pipe connected to the steam introduction unit can be connected without difficulty with the superheated steam supply unit attached to the superheated steam utilization furnace. Further, the steam introduction pipe connected to the steam introduction unit does not interfere with the attachment of the superheated steam supply unit to the superheated steam utilization furnace.

The housing is formed at a position different from the mounting surface portion and has a pair of side wall portions facing each other, and the water vapor introduction portion is provided on one of the pair of side wall portions. It is desirable that the superheated steam outlet portion is provided on the other side of the side wall portion of the above.
With this configuration, the configuration of the mounting surface portion can be simplified as compared with the configuration in which the steam introducing portion and the superheated steam leading portion are provided on the mounting surface portion, and the side walls provided with the steam introducing portion and the superheated steam leading portion are different. Therefore, the configuration of each side wall can be simplified.

The steam introduction section and the superheated steam lead-out section are exposed to the outside from the housing, and there is a risk of electric shock when the user touches them. Therefore, it is desirable that the steam introduction section and the superheated steam lead-out section are configured by using an insulating material.

It is desirable that the superheated steam lead-out unit is configured to be connectable to a steam introduction unit of another superheated steam supply unit. Specifically, it is desirable that the steam introduction section and the superheated steam lead-out section are configured by using an insulating flange.
With this configuration, a plurality of superheated steam supply units can be easily connected and used in combination according to the size of the superheated steam utilization furnace to be used and the intended use of superheated steam.

In order to preferably prevent electric shock due to the user touching the housing, an insulating member provided inside the housing and insulating the flow path forming body and each electrode and the housing from each other is further provided. It is desirable to prepare.

It is desirable that the flow path forming body has a plurality of straight portions forming a linear flow path, and a folded portion for sequentially connecting these straight portions in series.
With this configuration, the flow path in the housing can be lengthened, and the amount of superheated steam generated can be increased.

According to the present invention configured in this way, it is not necessary to design a dedicated heat insulating structure and insulating structure for the specifications of the superheated steam utilization furnace, and the superheated steam supply unit is easy to handle and has improved user convenience. Can be provided.

It is sectional drawing which shows typically the structure of the superheated steam supply unit of 1st Embodiment. It is a schematic diagram which shows the state which two superheated steam supply units of 1st Embodiment are connected. It is sectional drawing which shows typically the structure of the superheated steam supply unit of 2nd Embodiment. It is a schematic diagram which shows the state which two superheated steam supply units of a modified embodiment are connected.

<First Embodiment>
The superheated steam supply unit 100 according to the first embodiment is attached to the superheated steam utilization furnace TC to supply superheated steam into the furnace.

Specifically, as shown in FIG. 1, the superheated steam supply unit 100 is connected to a flow path forming body 2 made of a conductive material having a flow path formed inside and one end side of the flow path of the flow path forming body 2. A first electrode 3, a second electrode 4 connected to the other end of the flow path of the flow path forming body 2, and a housing 5 accommodating the flow path forming body 2 and the respective electrodes 3 and 4 are provided. I have.

The flow path forming body 2 is composed of, for example, a cylindrical conductor tube, and a plurality of (three in FIG. 1) straight line portions 2a forming a linear flow path and these straight line portions 2a are connected in series. It has a folded-back portion 2b that is sequentially connected. The folded-back portion 2b is formed in a U-shape or a U-shape so that the straight portions 2a are substantially parallel to each other. As a result, the flow path forming body 2 forms a flow path that reciprocates once or a plurality of times.

Here, as the arrangement configuration of the straight line portions 2a, the straight line portions 2a may be arranged substantially parallel to each other, may be arranged at equal intervals on the same plane, or the three straight line portions may be arranged at equal intervals. 2a may be arranged so as to be located at the apex of the triangle. In addition, the number of straight portions 2a of the flow path forming body 2 is not limited to three, and may be a plurality other than three.

A steam introduction section 6 for introducing steam (saturated steam or superheated steam) supplied from an external steam generation section (not shown) is formed at one end 2 m of the flow path forming body 2. Further, a superheated steam lead-out portion 7 for leading out the superheated steam generated by the flow path forming body 2 to the outside is formed at the other end 2n of the flow path forming body 2.

Further, a first electrode 3 is connected to one end 2 m of the flow path forming body 2. Further, a second electrode 4 is connected to the other end 2n of the flow path forming body 2. The second electrode 4 is provided so as to extend toward one end side (one end portion 2 m) of the flow path along the straight line portion 2a of the flow path forming body 2.

The housing 5 has, for example, a rectangular parallelepiped shape, and is made of stainless steel having excellent corrosion resistance, for example. The housing 5 has a mounting surface portion 51 that is attached to the superheated steam utilization furnace TC. The mounting surface portion 51 of the present embodiment is a side wall (left side wall) 5a on one end side in the longitudinal direction of the housing 5. The housing 5 is directly attached to the side wall portion TCa of the superheated steam utilization furnace TC via the mounting surface portion 51. The mounting structure may be screw-fixed via a mounting flange (not shown) provided on the housing 5, or may be fixed by a separate mounting member (not shown). ..

The mounting surface portion 51 of the housing 5 is provided with a superheated steam lead-out portion 7 formed at the other end portion 2n of the flow path forming body 2. Further, a superheated steam passing portion (opening) TC1 corresponding to the superheated steam leading-out portion 7 of the mounting surface portion 51 is formed on the unit mounting portion in the side wall TCa of the superheated steam utilization furnace TC. Further, a water vapor introduction portion 6 formed at one end portion 2m of the flow path forming body 2 is provided on the side wall (right side wall on the other end side in the longitudinal direction) 5b facing the mounting surface portion 51 of the housing 5. In the case of the present embodiment, the side wall on which the water vapor introduction portion 6 is provided may be any side wall as long as it is a side wall other than the side wall on which the mounting surface portion 51 is set.

The steam introduction section 6 and the superheated steam lead-out section 7 are configured by using an insulating material. Specifically, the steam introduction section 6 and the superheated steam lead-out section 7 are configured by using insulating flanges 6F and 7F. As a result, as shown in FIG. 2, it becomes possible to connect to another superheated steam supply unit 100. That is, the superheated steam lead-out unit 7 of one superheated steam supply unit 100 is directly connected to the steam introduction unit 6 of another superheated steam supply unit 100, or is connected via a connecting pipe of another member.

Further, the side wall (lower side wall) 5c of the housing 5 is provided with a power supply connecting portion 8 to which the first electrode 3 and the second electrode 4 are electrically connected. The power supply connection portion 8 is a terminal block, and the lead wire L of the external power supply P, which is a single-phase AC power supply, is connected. The power supply connection portion 8 is provided at a position that does not interfere with the mounting of the housing 5 on the superheated steam utilization furnace TC. The external power supply P is powered by a control unit (not shown) so that the temperature of the superheated steam derived from the superheated steam supply unit 100 becomes a predetermined temperature. The temperature of the superheated steam is detected by, for example, a temperature sensor (not shown) provided in or near the superheated steam lead-out unit 7.

Therefore, the superheated steam supply unit 100 of the present embodiment is provided inside the housing 5 and is provided inside the heat insulating member 9 that blocks heat from the flow path forming body 2 and inside the housing 5. An insulating member 10 that insulates the flow path forming body 2, the electrodes 3, 4 and the housing 5 from each other is provided.

The heat insulating member 9 is provided along the inner surface of the housing 5, and is provided so as to cover the periphery of the flow path forming body 2 and the electrodes 3 and 4. As the heat insulating member 9, for example, a heat insulating plate containing calcium silicate as a main component, a blanket-shaped heat insulating material made from ceramic fiber, alumina fiber, or the like can be considered.

Like the heat insulating member 9, the heat insulating member 10 is provided along the inner surface of the housing 5, and is provided so as to cover the periphery of the flow path forming body 2 and the electrodes 3 and 4. As the insulating member 10, for example, mica, heat-resistant silica cloth, or the like can be considered. Here, if the heat insulating member 9 and the insulating member 10 are configured by using a single member having heat insulating properties and insulating properties, for example, an electrically insulating heat insulating plate, the internal structure of the housing 5 can be simplified. it can. In addition, the insulating member 10 may be provided by winding around the outer peripheral surface of the flow path forming body 2 so as to cover the outer peripheral surface of the flow path forming body 2.

<Effect of the first embodiment>
According to the superheated steam supply unit 100 configured in this way, the flow path forming body 2 and the electrodes 3 and 4 that become hot due to energization heating are housed in the housing 5, so that the user can use the flow path forming body 2. And there is no risk of unexpectedly touching each of the electrodes 3 and 4. Further, since the heat insulating member 9 and the heat insulating member 10 are provided inside the housing 5, there is no risk of burns and electric shock even if the user touches the housing 5, and the flow path forming body 2 or the electrodes 3, 4 It is also possible to prevent sparks from. Further, since it is unitized by the housing 5 and the unit 100 is configured to be attached to the superheated steam utilization furnace TC, a heat insulating structure and an insulating structure dedicated to the specifications of the superheated steam utilizing furnace TC are provided. It does not need to be designed, is easy to handle, and can improve user convenience.

In addition, when a single-phase AC voltage is applied from the external power source P to the flow path forming body 2 via the electrodes 3 and 4, the direction of the current flowing through each linear portion 2a and the direction of the current flowing through the second electrode 4 are opposite. It becomes. Then, the magnetic fluxes generated by the respective currents cancel each other out, the impedance generated in the flow path forming body 2 is reduced, and the circuit power factor can be improved. Therefore, the equipment efficiency of the superheated steam supply unit 100 can be improved.

<Second Embodiment>
Next, the superheated steam supply unit 100 according to the second embodiment will be described with reference to FIG.

The superheated steam supply unit 100 according to the second embodiment is different from the first embodiment in the configuration of the flow path forming body 2 and the position of the mounting surface portion 51 of the housing 5.

Specifically, the flow path forming body 2 is composed of, for example, a cylindrical conductor tube, and has a plurality of (four in FIG. 3) straight line portions 2a forming a linear flow path and these straight line portions 2a. It has a folded-back portion 2b that is sequentially connected in series. The folded-back portion 2b is formed in a U-shape or a U-shape so that the straight portions 2a are substantially parallel to each other.

The other end 2n of the flow path forming body 2 is closed, and a plurality of fluid ejection holes serving as superheated steam leading-out portions 7 are formed at least in the straight line portion 2a (2ax) on the most downstream side. The plurality of fluid ejection holes are formed in substantially the entire longitudinal direction in the straight portion 2ax on the most downstream side, but a part in the longitudinal direction, for example, the other end from the central portion in the longitudinal direction of the straight portion 2ax on the most downstream side. It may be formed in a portion. As described above, the flow path forming body 2 has one steam introduction section 6 on the upstream side and a plurality of superheated steam lead-out sections 7 on the downstream side thereof. A fluid ejection nozzle may be provided in the fluid ejection hole to form the superheated steam lead-out unit 7.

Further, both one end 2m and the other end 2n of the flow path forming body 2 are configured to be located on one end side in the longitudinal direction of the housing 5. As a result, both the first electrode 3 and the second electrode 4 connected to the flow path forming body 2 are located on one end side in the longitudinal direction, and the configuration inside the housing 5 can be simplified. Here, by providing the power supply connection portion 8 on one end side in the longitudinal direction of the housing 5, the configuration of the first electrode 3 and the second electrode 4 can be further simplified. The power supply connection portion 8 is provided on the longitudinal side wall (upper side wall) 5d along the longitudinal direction of the housing 5.

The mounting surface portion 51 of the housing 5 is set on the longitudinal side wall (lower side wall) 5c along the longitudinal direction of the housing 5. The mounting surface portion 51 is provided with a plurality of superheated steam lead-out portions 7 along the longitudinal direction. Further, as shown in FIG. 3 , a superheated steam passing portion (opening) TC1 corresponding to the superheated steam lead-out portion 7 of the mounting surface portion 51 is formed on the unit mounting portion in the side wall TCa of the superheated steam utilization furnace TC. .. The heat insulating member 9 and the heat insulating member 10 of the present embodiment are arranged inside the housing on the inner surface of the side wall other than the lower side wall 5c, but are also arranged on the inner surface of the lower side wall 5c. Is also good.

<Effect of the second embodiment>
According to the superheated steam supply unit 100 configured in this way, in addition to the effect of the first embodiment, since a plurality of superheated steam lead-out portions 7 are provided on the mounting surface portion 51 of the housing 5, one superheated steam is provided. The superheated steam can be efficiently supplied to a wide range by the supply unit.

<Other modified embodiments>
The present invention is not limited to each of the above embodiments.

For example, the superheated steam supply unit 100 of the second embodiment may be configured to be connectable to another superheated steam supply unit 100. In this case, as shown in FIG. 4, the flow path forming body 2 has a connecting portion 11 that branches from the straight portion 2a or the folded portion 2b and is connected to the steam introducing portion 6 of another superheated steam supply unit 100. It has a branch flow path portion 2c. The connecting portion 11 is composed of an insulating flange. When the superheated steam supply unit 100 having this configuration is used alone, the branch flow path portion 2c is closed and used.

Further, although the flow path forming body 2 of each of the above-described embodiments forms one flow path, it may be branched into a plurality of branch flow paths in the middle. In this case, it is conceivable to provide a superheated steam lead-out unit in each branch flow path.

Further, a plurality of flow path forming bodies 2 may be housed inside one housing 5.

Further, although the superheated steam supply unit 100 of the above embodiment has a configuration in which a single-phase AC pressure is applied to the flow path forming body, a configuration in which a three-phase AC voltage is applied to the flow path forming body may be used. Specifically, it is conceivable to provide the flow path forming body with three electrodes at different positions along the flow path direction and connect the U phase, the V phase, and the W phase to the three electrodes.

In addition, the present invention is not limited to each of the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

100 ... Superheated steam supply unit TC ... Superheated steam utilization furnace 2 ... Flow path forming body 2a ... Straight part 2b ... Folded part 3 ... First electrode 4 ... Second Electrode 5 ... Housing 51 ... Mounting surface 6 ... Steam introduction part 7 ... Superheated steam lead-out part 8 ... Power supply connection part P ... External power supply 9 ... Insulation member 10 ...・ ・ Insulation member 6F, 7F ・ ・ ・ Insulation flange

Claims (10)

A superheated steam supply unit that is attached to a superheated steam-using furnace and supplies superheated steam into the furnace.
A flow path forming body made of a conductive material having a flow path formed inside,
With the first electrode connected to one end side of the flow path of the flow path forming body,
A second electrode connected to the other end of the flow path of the flow path forming body,
A housing for accommodating the flow path forming body and each of the electrodes,
A power supply connection portion provided in the housing, to which an external power supply is connected, and to which the electrodes are connected,
A steam introduction portion formed at one end of the flow path forming body and introducing steam into the flow path from the outside of the housing .
A superheated steam derivation unit formed on the downstream side of the water vapor introduction portion in the flow path forming body and deriving superheated steam from the flow path to the outside of the housing .
A superheated steam supply unit provided inside the housing and provided with a heat insulating member that blocks heat from the flow path forming body. The superheated steam supply unit according to claim 1, wherein the housing has a mounting surface portion to be attached to the superheated steam utilization furnace. The housing is externally attached to the superheated steam utilization furnace.
The superheated steam supply unit according to claim 2, wherein the superheated steam lead-out unit is located on the mounting surface portion. The superheated steam supply unit according to claim 3, wherein a plurality of the superheated steam lead-out units are located on the mounting surface portion. The invention according to any one of claims 2 to 4, wherein the housing has a side wall portion formed at a position different from the mounting surface portion, and the water vapor introduction portion is located on the side wall portion. Superheated steam supply unit. The housing is formed at a position different from the mounting surface portion, and has a pair of side wall portions facing each other.
The invention according to any one of claims 2 to 5, wherein the steam introduction portion is located on one of the pair of side wall portions, and the superheated steam outlet portion is located on the other side of the pair of side wall portions. Superheated steam supply unit. The superheated steam supply unit according to any one of claims 1 to 6, wherein the steam introduction unit and the superheated steam derivation unit are configured by using an insulating material. The superheated steam supply unit according to any one of claims 1 to 7, wherein the superheated steam lead-out unit is configured to be connectable to a steam introduction unit of another superheated steam supply unit. The superheated steam supply according to any one of claims 1 to 8, further comprising an insulating member provided inside the housing and insulating the flow path forming body, each electrode, and the housing from each other. unit. The aspect according to any one of claims 1 to 9, wherein the flow path forming body has a plurality of straight portions forming a linear flow path and a folded portion for sequentially connecting these straight portions in series. Superheated steam supply unit.