JP5563744B2 - Method for installing temperature measuring device in plate reactor, and plate reactor - Google Patents

Description

  The present invention relates to a plate reactor, and more particularly to a method for installing a temperature measuring device between plates in a plate reactor, and a plate reactor having such a temperature measuring device.

  As a reactor used for a gas phase reaction in which a granular solid catalyst is used, such as a gas phase catalytic oxidation reaction of propane, propylene, or acrolein, and a granular solid catalyst is used, for example, to react a gaseous raw material A reaction vessel, a plurality of heat transfer plates provided side by side in the reaction vessel, and a device for supplying a heat medium to the heat transfer tube, wherein the reaction vessel is supplied. The gas is discharged through a gap between adjacent heat transfer plates, and the heat transfer plates include a plurality of the heat transfer tubes connected at the peripheral edge or the edge of the cross-sectional shape and adjacent to each other. There is known a plate reactor in which a catalyst is filled in a gap between heat transfer plates (see, for example, Patent Document 1).

  Such a plate reactor generally has a plurality of catalyst layers formed in the gaps between adjacent heat transfer plates and has excellent contact between the heat transfer plates and the catalyst. It is excellent from the viewpoint of efficiently producing a product by a phase reaction in a large amount.

  On the other hand, in the gas phase reaction, measurement of the temperature in the catalyst layer between the heat transfer plates is desired from the viewpoint of controlling the gas phase reaction. In this case, it is necessary to install a temperature measurement device between the heat transfer plates so that the temperature measurement unit and the heat transfer plate do not contact each other. In a multitubular reactor used for a gas phase catalytic oxidation reaction, as a method of installing a temperature measuring device in a catalyst in a reaction tube, for example, a string-like or tubular support that supports a temperature measuring unit in the temperature measuring device. A technique for providing a steadying member for preventing contact between the inner wall of a reaction tube and a support is known (see, for example, Patent Document 2).

However, in the plate reactor, the surface of the heat transfer plate that forms the gap has irregularities formed along the ventilation direction in the reaction vessel, so that the support can be maintained in the center in the gap. If the anti-sway member is used as much as possible, it may not be possible to insert and withdraw the support body into the gap. For this reason, in a plate-type reaction, a technique capable of installing a temperature measuring device so as to accurately measure the temperature of the catalyst layer in which the catalyst is filled in the gap between adjacent heat transfer plates is required. It was.
JP 2004-202430 A JP 2003-1094 A

  The present invention provides a plate reactor capable of accurately measuring the temperature of a catalyst layer in which a catalyst is filled in a gap between adjacent heat transfer plates in a plate reaction.

  The present invention provides a plate reactor in which a support of a temperature measuring device is stretched in the gap between adjacent heat transfer plates on the center surface of the gap in the opposite direction of the heat transfer plate, and in this state, the catalyst is placed in the gap. And a plate reactor constructed by this method is provided.

That is, the present invention has a plurality of heat transfer plates provided side by side in a reaction vessel for reacting a gaseous raw material, and the heat transfer plates are connected in a straight line with peripheral edges or edges of the cross-sectional shape. In the plate reactor including a plurality of heat transfer tubes, a temperature measuring device for measuring the temperature of the gap is installed in the gap between adjacent heat transfer plates, and the temperature measuring device is flexible. And a temperature measuring unit supported by the support, the gap has a width larger than the width of the support, and the support is arranged in a direction opposite to the heat transfer plate. There is provided a method comprising the steps of stretching the center surface of the gap and filling the gap with a catalyst while the support is stretched.

The present invention also provides a reaction vessel for reacting a gaseous raw material, a plurality of heat transfer plates provided side by side in the reaction vessel, and a temperature for measuring the temperature of a gap between adjacent heat transfer plates. A measuring device and a catalyst filled in the gap, wherein the reaction vessel is a vessel in which the supplied gas is discharged through a gap between adjacent heat transfer plates, and the heat transfer plate Is a plate-type reactor including a plurality of heat transfer tubes whose peripheral edges or edges of the cross-sectional shape are connected in a straight line, and the temperature measuring device includes a flexible support body, and the support body. and a temperature measuring unit which is supported, the gap has a width greater than a width of said support, said support is the support center plane of the gap in the opposing direction of the heat transfer plate Tensioning step and the support being stretched Is established by the step of filling the catalyst into the gap, the support by the catalyst filled in the gap, providing a plate-type reactor is located in the center plane of the gap.

  Furthermore, the present invention provides the method and the plate reactor, wherein the temperature measuring device further includes a spacer in contact with one or both of two heat transfer plates that sandwich the support in the gap.

  According to the present invention, in the plate reactor, the support for supporting the temperature measuring unit is held in the center of the gap between the adjacent heat transfer plates, and the catalyst is filled in the gap in this state. Therefore, in the plate reactor, the temperature measuring part can be arranged at the center of the catalyst layer. Therefore, it is possible to provide a plate reactor that can accurately measure the temperature of the catalyst layer.

  Moreover, in this invention, when the said temperature measuring apparatus has the said spacer, it is still more effective from a viewpoint of suppressing the shake | deflection of the support body in the opposing direction of a heat exchanger plate.

  The plate reactor according to the present invention measures the temperature of a gap between a reaction vessel for reacting a gaseous raw material, a plurality of heat transfer plates provided side by side in the reaction vessel, and adjacent heat transfer plates. And a catalyst filled in the gap.

  The reaction vessel is a vessel in which a plurality of heat transfer plates arranged in parallel are accommodated, and the supplied gas is discharged through a gap between adjacent heat transfer plates. For the reaction vessel, for example, a casing having a rectangular cross section with respect to the aeration direction or a shell having a circular cross section is used.

  The reaction vessel usually has a pair of vents. One of the pair of vents serves as a supply port for a raw material gas supplied to the reaction vessel, and the other serves as a discharge port for a product gas generated in the reaction vessel. The form of the vent is not particularly limited as long as the gas is supplied to the reaction vessel and the gas is discharged from the reaction vessel. The pair of vent holes are preferably provided to face each other. As such a vent, for example, a pair of vents provided at both ends of a casing or a shell, or a cylindrical portion formed in a central portion including the central axis of the shell and an inner peripheral portion of the shell, respectively, the crossing of the shell A pair of vents for allowing gas to flow radially on the surface may be mentioned.

  The heat transfer plate includes a plurality of heat transfer tubes in which peripheral edges or edges of the cross-sectional shape are connected in a straight line. As disclosed in Patent Document 1, such a heat transfer plate is formed by forming two corrugated plates each having an arc, an elliptical arc, a rectangular pattern or the like continuously formed at the ends of the patterns of both corrugated plates. It can be formed by joining together with convex edges. Alternatively, the heat transfer plate can be formed by connecting a plurality of the heat transfer tubes at the peripheral edge or edge, or the heat transfer plates are stacked so that the plurality of the heat transfer tubes are in contact with each other at the peripheral edge or the edge in the reaction vessel. Can be formed.

  The shape and size of the heat transfer plate are determined according to the shape and size of the reaction vessel, but are generally rectangular, for example, the length (that is, the connection height of the heat transfer tubes) is 1 to 6 m, and the width (that is, the height). The length of the heat transfer tube) is 0.05 to 10 m.

  In the reaction vessel, the heat transfer plates are arranged so that a gap between adjacent heat transfer plates has a width larger than the width of the support at a position equidistant from the adjacent heat transfer plates. In a range where such a gap is formed, the heat transfer plates may be arranged so that the convex edges on the surfaces of adjacent heat transfer plates face each other, or the convex edges on the surface of one heat transfer plate are the other. It may be arranged so as to face the concave edge of the surface of the heat transfer plate. As for the distance between adjacent heat transfer plates, the shortest distance of the heat transfer tubes in the transverse direction of each heat transfer plate is preferably 5 to 50 mm.

  The heat transfer tube in the heat transfer plate is formed to extend in a direction orthogonal to the ventilation direction in the reaction vessel, that is, the direction of the heat medium flowing through the heat transfer tube is relative to the ventilation direction in the reaction vessel. It is preferable from the viewpoint of controlling the reaction of the raw material by adjusting the temperature of the heat medium in the heat transfer tube.

  The heat transfer tube is formed of a material having heat transfer properties in which heat is exchanged between a heat medium in the heat transfer tube and a catalyst layer circumscribing the heat transfer tube. Examples of such a material include stainless steel and carbon steel. The cross-sectional shape of the heat transfer tube may be a circle, a substantially circular shape such as an elliptical shape or a rugby ball shape, or a polygonal shape such as a rectangle. The peripheral edge in the cross-sectional shape of the heat transfer tube means a peripheral edge in a circular shape, and the end edge in the cross-sectional shape of the heat transfer tube means an edge of a major axis end in a substantially circular shape or a single edge in a polygon.

  The cross-sectional shape and size of each of the plurality of heat transfer tubes in one heat transfer plate may be constant or different. Regarding the size of the cross-sectional shape of the heat transfer tube, for example, the width of the heat transfer tube is 3 to 20 mm, and the height of the heat transfer tube is 10 to 50 mm.

  The temperature measuring device includes a flexible support and a temperature measurement unit supported by the support. One temperature measurement device may be provided in an integral reaction vessel or a plurality of temperature measurement devices may be provided. From the viewpoint of grasping and controlling the reaction state in one reaction vessel, a plurality of temperature measuring devices are preferably provided in an integral reaction vessel, for example, 2 to 20 are preferably provided.

  For the support, for example, a flexible string, band, chain, or tube is used. The length of the support is preferably 1.1 to 12 m, and the thickness (width) of the support is preferably 0.5 to 5 mm. Moreover, it is preferable that the thickness of a support body is 1/5 or less of the shortest distance in the cross direction of a heat exchanger tube between adjacent heat exchanger plates. In addition, the thickness of a support body is the maximum thickness in the cross direction of a heat exchanger tube when a support body is provided in the said clearance gap.

The temperature measuring unit is preferably a member capable of transmitting a temperature measurement value as an electric signal. For the temperature measurement unit, the above-described member corresponding to the temperature range of the catalyst layer during the reaction can be used. Examples of such a temperature measuring unit include a platinum resistance thermometer having a coiled platinum wire, a thermistor, a thermocouple, and an optical fiber type temperature measuring device that measures temperature by changing an optical signal in the optical fiber. Can be mentioned.

  One temperature measurement unit may be provided for one support, or a plurality of temperature measurement units may be provided. The temperature measurement unit may be fixed to a support, or may be supported by the support so as to be movable in a tubular support, for example. From the viewpoint of controlling the reaction by detecting the temperature of the catalyst layer, the temperature measurement unit fixed to the support is preferably provided in one support in the range of 1 to 30, and when a plurality of reaction zones are formed in the catalyst layer Then, it is preferable to provide 1-10 with respect to one reaction zone.

  The said support body is arrange | positioned in the said clearance gap in the position of equidistance from the adjacent heat exchanger plate. The position at the same distance from the adjacent heat transfer plate is the axis of the adjacent heat transfer plate when the straight line formed by connecting the connection ends of the heat transfer tubes in the cross section of the heat transfer plate is the axis of the heat transfer plate. The intermediate position (also referred to as “the center plane of the gap”). Such an arrangement of the support can be performed by a tensioning step and a filling step described later.

  The support only needs to be stretched on the center plane of the gap. For example, the fact that the support is further fixed along the aeration direction in the reaction vessel accurately grasps the reaction state at a predetermined temperature of the heat medium. It is preferable from the viewpoint that the support is further fixed to the center plane of the gap diagonally, for example, along a diagonal line, from the viewpoint of widely grasping the reaction state in the catalyst layer with a single support.

  The temperature measuring device preferably further includes a spacer in contact with one or both of the two heat transfer plates that sandwich the support in the gap, from the viewpoint of suppressing the swing of the support in the opposing direction of the heat transfer plate. . One or a plurality of spacers may be provided for one support. The spacer is preferably a bar or a plate whose surface extends along the supply direction of the catalyst at the time of filling, from the viewpoint of preventing the catalyst from staying at the time of filling the catalyst. Furthermore, it is preferable that one spacer is in contact with only one of the adjacent heat transfer plates from the viewpoint of easily inserting the support body into the gap and pulling out the support body from the gap. It is preferable to contact the heat transfer plate from the viewpoint of reducing the number of spacers. In addition, the spacers should be provided on one support from 1 to 10 from the viewpoints of filling these catalysts, installing and removing the temperature measuring device in the gap, and arranging the support on the center plane of the gap. Is preferred.

  As the catalyst, a normal granular catalyst filled in a gap between a tube or a heat transfer plate by a gas phase reaction can be used. One or more catalysts may be used. Examples of such a catalyst include a catalyst having a particle diameter (longest diameter) of 3 to 20 mm and a specific gravity of 0.5 to 2. Examples of the shape of the catalyst include a spherical shape, a cylindrical shape, and a Raschig ring shape.

  The plate reactor of the present invention may further have other configurations than the above-described configurations. Examples of such other configurations include a heat medium supply device, a partition, a partition locking portion, and a vent plug.

  The heat medium supply device is a device that supplies a heat medium to the heat transfer tube. Examples of such a heat medium supply device include a device that supplies a heat medium in one direction to all of the plurality of heat transfer tubes, and a heat medium that supplies a heat medium in one direction to a part of the plurality of heat transfer tubes. Another part of the heat pipe includes a device for supplying a heat medium in the reverse direction. The heat medium supply device is preferably a device that circulates the heat medium inside and outside the reaction tube via the heat transfer tube. The heating medium supply device preferably has a device for adjusting the temperature of the heating medium from the viewpoint of controlling the reaction in the reaction vessel.

  The partition is a member that is provided in a gap between adjacent heat transfer plates along a ventilation direction in the reaction vessel and forms a plurality of sections in the gap. As the partition, a member capable of holding the catalyst in each compartment when the catalyst is filled in each compartment is used. Examples of such partitions include stainless steel plates, square bars, round bars, nets, glass wool, and ceramic plates. The partition is preferable from the viewpoint of performing the filling of the catalyst into the gap in units of sections and filling the catalyst accurately and easily. From such a viewpoint, the partition preferably forms a partition having a volume of 1 to 100 L, and it is preferable that all the formed partitions have the same volume.

  The said partition can be suitably provided in the clearance gap between heat-transfer plates according to the property of a partition. For example, a flexible partition or a partition having the shortest distance between the heat transfer plates is inserted into a gap between adjacent heat transfer plates in a plurality of heat transfer plates installed in the reaction vessel in advance. Therefore, it can be provided in the gap between the heat transfer plates. In addition, when the heat transfer plate is installed in the reaction vessel, the partition having a shape closely contacting the surface of the heat transfer plate can be provided in the gap between the heat transfer plates by alternately installing the heat transfer plate and the partition. it can.

  The partition locking portion is a member for locking the partition end to the end of each partition in order to hold the flexible partition in the gap so that the catalyst does not leak from the formed partition. It is. Examples of the partition member include a hook, a ring for locking the hook, a hole, and a recess.

  The vent plug is a member that achieves both the air permeability of each section and the retention of the catalyst, and is a member that is detachably fixed to the end of each section. The vent plug is preferable from the viewpoint of extracting the catalyst in units of compartments from the gap. For example, the vent plug is detachably attached to the end of each compartment by using a hole and a claw that is biased in the direction of advancement into the hole, and a pair of locking portions such as a hole, bolt, and nut. Can be fixed.

  The plate reactor of the present invention can be constituted by the following method. This method has a plurality of heat transfer plates provided side by side in a reaction vessel for reacting gaseous raw materials, and the heat transfer plates are connected by a peripheral edge or an edge of a cross-sectional shape. A method of installing the temperature measuring device for measuring the temperature of the gap in the gap between adjacent heat transfer plates in a plate reactor including a heat tube, wherein the gap is separated from the adjacent heat transfer plate. A stretching step of stretching the support in a straight line at equidistant positions, and a filling step of filling the gap with the catalyst in a state where the support is stretched.

  In the tensioning step, the support is pulled so that tension is applied to the support without breaking the support and making the support substantially linear. In the tensioning step, the support may be pulled at both ends, or one end of the support may be fixed and the other end of the support may be pulled. Such pulling of the support body is a member such as a spring or a weight that urges the end of the support body with a predetermined force in a direction in which the support body is pulled, or a support body such as a screw and a nut. This can be done using a member that advances and fixes the end of the support in the direction. The end of the support may be fixed to the end of the gap in the ventilation direction, or may be fixed at an arbitrary position on the extension line. The end of the support can be fixed by, for example, a pair of members engaged with each other such as a hook provided on one side of the support or the reaction vessel and a hole or ring provided on the other side.

The filling step can be performed by continuously or intermittently filling the gaps with the same amount of catalyst as the gaps while the support is stretched. The appropriate filling state of the catalyst can be determined by, for example, comparing the position of the top surface of the catalyst (catalyst layer) filled in each gap, or comparing the measured value and the calculated value of the top surface in each gap. .

  When the plate reactor further has the partition, the catalyst can be charged in units of compartments. When the plate reactor further has the vent plug, the catalyst can be extracted in units of compartments. In this case, the filling step can be performed by continuously or intermittently filling each compartment with the same amount of catalyst as each compartment.

After the filling step, the support is held on the center plane of the gap by the catalyst, so that the tension of the support can be released. From the above, it is possible to configure a plate reactor that can measure the temperature of the catalyst at the center of the catalyst layer.
Hereinafter, the present invention will be described more specifically based on the drawings.

  The plate reactor shown in FIG. 1 has a rectangular casing 1 and a heat transfer tube 2, a plurality of heat transfer plates 3 provided side by side in the casing 1, and heat supplied to the heat transfer tube 2. A plurality of temperature measuring devices 5 provided along a ventilation direction in the casing 1 in a gap between adjacent heat transfer plates 3, and a hole provided in a lower portion of the heat transfer plate 3. It has the perforated board 6, the pump 7 for circulating the heat medium of the heat medium accommodating part 4, and the temperature control apparatuses 8a-8c for adjusting the temperature of the circulating heat medium (refer FIG. 2 and 3).

  The casing 1 forms an air passage having a rectangular cross-sectional shape and corresponds to the reaction vessel. The casing 1 has a pair of opposed vents 10 and 10 ′ at the upper end and the lower end of the casing 1. The casing end 11 including the vent 10 and the casing end 11 ′ including the vent 10 ′. And a casing main body in which the heat transfer plate 3 is accommodated. The casing end portions 11 and 11 'are connected to the casing body. The casing end 11 is provided with a nozzle 12 for inserting the temperature measuring device 5 into the casing 1.

  The heat transfer tube 2 is, for example, a tube having a major axis of 30 to 50 mm and a minor axis of 10 to 20 mm and an elliptical cross section.

  The heat transfer plate 3 has a shape in which a plurality of heat transfer tubes 2 are connected by an edge having a cross-sectional shape. In the cross-sectional shape of the heat transfer plate 3, these end edges are connected in a straight line. The heat transfer plate 3 is formed by joining two corrugated plates each having an elliptical arc formed continuously at a convex edge formed at the ends of the arcs of both corrugated plates. Adjacent heat transfer plates 3 may be arranged in parallel so that the convex edges of the surfaces face each other, but in the plate reactor of FIG. 1, the convex edges of the surface of one heat transfer plate 3 and the other The heat transfer plates 3 are arranged in parallel so as to face the concave edges on the surface.

  For example, as shown in FIG. 4, the heat transfer plate 3 includes three types of heat transfer tubes 2 a to 2 c having different cross-sectional sizes in the upper part, the middle part, and the lower part. The heat transfer plate 3 is formed such that the long axes of the heat transfer tubes 2a to 2c are arranged in a straight line. Further, for example, the heat transfer tube 2 a forms the heat transfer plate 3 for 20% of the height of the heat transfer plate 3, and the heat transfer tube 2 b forms the heat transfer plate 3 for 30% of the height of the heat transfer plate 3. The heat transfer tube 2 c forms the heat transfer plate 3 for 40% of the height of the heat transfer plate 3. 10% of the height of the heat transfer plate 3 is formed by the upper and lower joint plate portions of the heat transfer plate 3.

  The cross-sectional shape of the heat transfer tube 2a formed on the upper part of the heat transfer plate 3 is an ellipse having a major axis of 50 mm and a minor axis of 20 mm. The cross-sectional shape is an ellipse having a major axis of 40 mm and a minor axis of 16 mm, and the sectional shape of the heat transfer tube 2 c formed at the lower part of the heat transfer plate 3 is a major axis of 30 mm and a minor axis of 10 mm. It is oval.

  The heat transfer plates 3 are arranged in parallel at the same interval in the entire reaction vessel. For example, the horizontal distance between the outer walls of the heat transfer tubes 2a in the gap between the adjacent heat transfer plates 3 is 30 mm.

  The heat medium accommodating portion 4 is a container provided on a pair of opposing walls of the casing 1, and a supply port for supplying a heat medium to each heat transfer tube 2 is formed in the wall. The heat medium is divided into a plurality at a predetermined height so that the heat medium meanders between the heat medium accommodating portions 4 via the heat transfer tubes 2.

  The perforated plate 6 is a plate in which holes having a diameter of 0.20 to 0.99 times the longest diameter of the catalyst to be filled are provided with an opening ratio of 20 to 99%. In the plate reactor shown in FIG. 1, in order to prevent air from flowing into the gap between the outermost heat transfer plate 3 and the wall of the casing 1, as shown in FIG. A gap from the edge of the arranged heat transfer plate 3 to the wall of the casing 1 is closed.

  For the pump 7, a device capable of transferring a heat medium having a desired temperature is used. Moreover, apparatuses, such as a heat exchanger which can control the temperature of a heat medium to desired temperature, are used for each of the temperature control apparatuses 8a-8c. The heat medium accommodating portion 4, the pump 7, and the temperature adjusting devices 8a to 8c constitute a heat medium supply device.

  For example, as shown in FIG. 5, the temperature measuring device 5 is provided in an outermost gap and an arbitrary gap in the central portion among a plurality of gaps formed by the heat transfer plate 3. In the gap, along the flow direction of the heat medium, it is provided at a plurality of locations including the vicinity of the heat medium inlet and the vicinity of the outlet in the casing 1. The installation position of the temperature measuring device 5 can be determined according to the temperature difference between the upstream heat medium and the downstream heat medium in one heat transfer tube 2 of the heat transfer plate 3. For example, in the case where the temperature of the heat medium is controlled in units of 0.5 ° C., the temperature measuring device 5 has a temperature difference between the heat medium on the upstream side and the heat medium on the downstream side in one heat transfer tube 2 of the heat transfer plate 3. Is provided at a position where the temperature becomes 1 ° C. or higher.

Temperature measuring apparatus 5, as shown in FIG. 4, a support 5a having flexibility, a plurality of temperature measuring section 5 d which is supported by the support member 5a, extends horizontally from the support 5a, Yes a plurality of spacers 5c in contact with the surface of the heat transfer plate 3, and the flange 5 b provided on the base end of the support member 5a, a connector 5e connected to the flange 5 b, and a cable 5f connected to the connector 5e doing. The tip of the support 5a extends downward through the hole in the perforated plate 7, and a fixing flange 5g is provided at the tip of the support 5a.

The support 5a is a stainless steel tube having an average tube wall thickness of 0.2 mm. In the support 5a, thermocouple 11 present a temperature measuring section 5 d is inserted. Each temperature measurement part 5d is arrange | positioned according to the temperature change in each catalyst layer. For example, the temperature measuring unit 5d is provided in the vicinity of the inlet of the reaction gas in the catalyst layer, in the vicinity of the outlet, and at three locations where the maximum temperature is predicted in each reaction zone of each catalyst layer. More specifically, as shown in FIG. 4, the temperature measuring unit 5 d is provided at the lower part of the first reaction zone formed by the heat transfer tube 2 a group, one at the upper end of each gap in the ventilation direction of each gap. Three at the center of the second reaction zone formed by the heat transfer tube 2b group, three at the top of the third reaction zone formed by the heat transfer tube 2c, and one at the lower end of each gap. , Respectively.

The position where the temperature difference of the heat medium in each heat transfer tube 2 is 1 ° C. or more and the position where the maximum temperature is predicted in each reaction zone of each catalyst layer are the results of experiments using this reactor tester. Or CFX from Ansys Corporation, STAR-CD from CD adapco, P
It can be determined based on the result of computer simulation using software such as SE's gPROMS.

  The spacer 5c is a stainless steel bar that has a base end fixed to the support 5a and extends in the horizontal direction. The spacer 5c has a length corresponding to the position on the support 5a, and the length at which the tip of the spacer 5c contacts the surface of the heat transfer plate 3 when the support 5a is supported by the center surface of each gap. Have Three spacers 5c are provided from the center portion to the base end portion of the support body 5a, which is separated from the distal end portion of the support body 5a to which the support body 5a is fixed, and each of the opposing heat transfer plates 3 is provided. It is provided so that it may contact alternately.

The flange 5 b is placed on a flange support member that supports the flange 5 b at a predetermined height in the casing 1. The flange support member is, for example, a member that is inserted through a bolt suspended from the casing end 11 and is maintained at a predetermined height by a nut. For example, two steel wires sandwiching the support 5a and a hole for the bolt And a steel wire support member that supports two steel wires, and a nut that tightens the steel wire support member in which the bolt is inserted into a bolt hole from below. The fixing flange 5g is a disk or a ring provided at the tip of the support 5a and having a diameter larger than the diameter of the hole of the perforated plate 6.

  The temperature measuring device 5 of FIG. 4 is fixed to the perforated plate 6 by the fixing flange 5g at the lower end of the gap at a position equidistant from each heat transfer plate 3 in the vertical direction. At the upper end of the gap, the base end of the support body 5a is fixed by the flange support member at a position equidistant from each heat transfer plate 3. By tightening the nut of the flange support member, the nut moves upward, the support 5 is stretched upward by the flange support member, and the support 5a is in contact with the surface of the heat transfer plate 3 with each spacer 5c being in contact with the surface. It becomes straight.

  In this way, the catalyst is filled in the gap in a state where tension is applied to the support 5a in the vertical direction. As the catalyst, for example, a catalyst having a cylindrical shape, a particle diameter (longest diameter) of 4 mm, and a specific gravity of 0.7 is used.

  When the gap is filled with the catalyst, the support 5a is supported by the filled catalyst, and the gap is disposed on the center plane of the gap. After filling the catalyst, the nut of the flange support member may be loosened, the fixing flange 5g may be removed, or the flange support member may be disassembled.

Further, as shown in FIG. 6, the support 5 a is fixed to the flange 5 b by the flange support member above the gap and passes through the hole of the perforated plate 6 before filling the catalyst. By hanging the weight 5h on the tip, it can be stretched linearly on the center plane of the gap. In this case, after filling the catalyst, the weight 5h may be removed, and the flange support member may be disassembled.

  By using the plate reactor of FIG. 1, the temperature of the heating medium can be appropriately controlled based on the measured value of the temperature measured by each temperature measuring device 5 during the reaction. For example, in the gas phase catalytic oxidation reaction that is an exothermic reaction using the plate reactor of FIG. 1, the heating medium before supplying the heat transfer tube 2 so that the measured value in each temperature measuring device 5 is not more than the upper limit temperature of the catalyst. Can be adjusted by the temperature adjusting devices 8a to 8c. For supplying the heat medium to each heat transfer tube, from the viewpoint of precisely adjusting the temperature of the heat medium and controlling the reaction temperature, as shown in FIG. A mixer 13 that disperses the heat medium in the heat medium container 4 from the heat medium container 4 toward each heat transfer plate 3 in the horizontal direction can be used.

  In the plate reactor shown in FIG. 1, the temperature is measured at the center of the gap in the opposing direction of the heat transfer plate 3 because the gap is filled with the catalyst while the temperature measuring device 5 is stretched on the center plane of the gap. A plate reactor in which the measuring device 5 is held can be configured. Therefore, the plate reactor of FIG. 1 is excellent in that the reaction temperature in the plate reactor is precisely controlled. In the plate reactor of FIG. 1, the support 5a can be stretched in the vertical direction by fixing the lower end of the support 5a and lifting the upper end, and fixing the upper end of the support 5a to the lower end. Can be done by pulling down.

  In the plate type reactor of FIG. 1, the lower end of the support 5a is fixed to the center plane of the gap in the perforated plate 6, and a predetermined temperature between the heat transfer plate 3 and the support 5a is provided above the support 5a. Since the spacer 5c that keeps the distance is provided, it is excellent in that the support 5a is accurately arranged on the center plane of the gap even in the upper part of the support 5a.

In the plate reactor shown in FIG. 1, instead of the flange 5 b , a hole that is engaged with a hole of the perforated plate 6 or a ring provided on the perforated plate 6 is used. You may fix the front-end | tip of the support body 5a. Such a configuration is excellent in that the tip of the support body 5a is fixed to the center plane of the gap with a simple configuration with a small contact area.

  In a heterogeneous gas phase reaction in which a catalyst is packed as in a plate reactor, grasping the temperature of the catalyst layer is important from the viewpoint of controlling the reaction. According to the plate type reactor of the present invention, a temperature measuring device in a non-contact state with the heat transfer plate can be accurately and easily performed, and such a plate type reactor can be controlled together with precise reaction control in the plate type reactor. Great improvement in workability in reactor installation, maintenance management, and periodic inspection is expected.

It is a figure which shows schematically the structure in one Embodiment of the plate-type reactor of this invention. It is a figure which shows a cross section when the plate type reactor of FIG. 1 is cut | disconnected along the A-A 'line. It is a figure which shows a cross section when the plate type reactor of FIG. 1 is cut | disconnected along a B-B 'line. It is a figure which shows an example of the installation state of the adjacent heat-transfer plate 3 and the temperature measuring apparatus 5 provided between them. 3 is a plan view schematically showing an example of the arrangement of the temperature measuring device 5 in the casing 1. FIG. It is a figure which shows the other example of the installation state of the adjacent heat-transfer plate 3 and the temperature measurement apparatus 5 provided between them.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2, 2a-2c Heat-transfer tube 3 Heat-transfer plate 4 Heat-medium accommodating part 5 Temperature measuring device 5a Support body 5b Flange 5c Spacer 5d Temperature measuring part 5e Connector 5f Cable 5g Fixing flange 5h Weight 6 Perforated plate 7 Pump 8a ~ 8c Temperature adjusting device 10, 10 'Vent 11, 11' Casing end 12 Nozzle 13 Mixer 14 Disperser

Claims (4)

A plurality of heat transfer plates provided side by side in a reaction vessel for reacting gaseous raw materials, wherein the heat transfer plates are connected in a straight line at the peripheral edges or edges of the cross-sectional shape. A temperature measuring device for measuring the temperature of the gap in a gap between adjacent heat transfer plates in a plate reactor including:
The temperature measuring device includes a flexible support and a temperature measurement unit supported by the support.
The gap has a width greater than the width of the support;
Stretching the support on the center plane of the gap in the facing direction of the heat transfer plate;
And a step of filling the gap with a catalyst in a state where the support is stretched, and a method for installing a temperature measuring device in a plate reactor.   The method according to claim 1, wherein the temperature measuring device further includes a spacer in contact with one or both of two heat transfer plates that sandwich the support in the gap. A reaction vessel for reacting a gaseous raw material, a plurality of heat transfer plates provided side by side in the reaction vessel, a temperature measurement device for measuring the temperature of a gap between adjacent heat transfer plates, and Having a catalyst filled in the gap,
The reaction vessel is a vessel in which the supplied gas is discharged through a gap between adjacent heat transfer plates,
The heat transfer plate is a plate reactor including a plurality of heat transfer tubes whose peripheral edges or edges of the cross-sectional shape are connected in a straight line,
The temperature measuring device includes a flexible support and a temperature measurement unit supported by the support.
The gap has a width greater than the width of the support;
The support is installed by a step of stretching the support on the center surface of the gap in the facing direction of the heat transfer plate, and a step of filling the gap with a catalyst while the support is stretched .
The plate reactor according to claim 1, wherein the support is disposed on a central plane of the gap by a catalyst filled in the gap.   The plate reactor according to claim 3, wherein the temperature measuring device further includes a spacer in contact with one or both of two heat transfer plates that sandwich the support in the gap.

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