JP2012217946A - Waste liquid recovery apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To combine the avoidance of equipment damage associated with tank replacement and simplification of replacement work.SOLUTION: This waste liquid recovery apparatus 100 is adapted to lift an empty tank 152 by the resilience of a plurality of coil springs 184 arranged at the circumferential equal pitches on the bottom face side of the tank to support the empty tank 152 from the lower side. Consequently, when the empty tank 152 is placed on a holding plate 182, a clearance K is formed between the bottom face of the holding plate 182 and the cell upper face of a load cell 188. When the tank 152 falls against the resilience with the progress of storage of waste liquid, the tank 152 is supported from the lower side while holding a tank fall position by stoppers 186 provided at the respective corners of the tank.

Description

  The present invention relates to a waste liquid recovery apparatus that recovers a waste liquid containing a metal that acts as a catalyst.

  The waste liquid is normally stored in a tank, and the tank is replaced when the waste liquid storage capacity reaches a specified amount, for example, a full water capacity. The detection of the amount of waste liquid is roughly classified into a detection method using a float sensor or the like installed in the tank and a detection method using a load cell or the like that measures the tank weight by contacting the bottom of the tank. A waste liquid containing a metal that acts as a catalyst (hereinafter referred to as catalyst metal) tends to cause damage or malfunction of the sensor in the tank due to the erosion action of the contained catalyst metal. For example, as shown in FIG. 7, in a sensor that is installed in a tank and directly detects the water level, the sensor erodes or the float switch can be slid up and down to detect the water level by the vertical movement of the float. The surface of the vertical movement guide shaft may be corroded, or the solid content in the waste liquid may adhere to the surface and the vertical movement of the float may become unstable. In order to avoid such a point, a method of measuring the weight of the waste liquid by measuring the weight with a load cell or the like is employed (for example, Patent Document 1). Such a weight measurement method is frequently used not only for waste liquid but also for collecting other solutions (Patent Document 2, etc.).

JP 2002-169625 A JP 2009-138102 A Japanese Patent Laid-Open No. 2007-1915

  The catalyst metal-containing solution is used, for example, in a manufacturing process in which both electrode layers of the cathode and the anode are formed on both membrane surfaces of the electrolyte membrane in the fuel cell. As recovered. In such a manufacturing process, since the amount of waste liquid increases, inconvenience may occur if the load cell is simply placed in contact with the bottom of the tank as disclosed in Patent Document 1. For example, when collecting waste liquid in the manufacturing process, if the tank capacity is small, the frequency of tank replacement increases, so a relatively large capacity tank is used. Such a large-capacity tank does not contain waste liquid, but also increases the weight of the tank itself.Therefore, when replacing a tank containing waste liquid and an empty tank not containing waste liquid, an inadvertent load is applied to the load cell that contacts the bottom of the tank. Careful work was required so as not to hang, and it was complicated. In addition, stable holding and support of the tank in the waste liquid storage process is also required, but it has not been sufficient to cope with these points.

  In view of the above problems, an object of the present invention is to achieve both avoidance of equipment damage associated with tank replacement and simplification of replacement work.

  In order to achieve at least a part of the above object, the present invention adopts the following configuration.

[Application 1: Waste liquid recovery equipment]
A waste liquid recovery device for recovering a waste liquid containing a metal that acts as a catalyst,
At least two tank units having a tank for storing the waste liquid;
A supply system for distributing and supplying the waste liquid to the tank of the tank unit;
A tank holding unit for holding the tank,
The holding unit is
The tank is disposed at the periphery of the bottom surface of the tank so as to extend toward the bottom surface of the tank, and exerts a resilience on the side where the tank is lifted to the front tank. A plurality of projectiles lifted by force to support the tank;
The tank is disposed so as to extend toward the bottom surface of the tank and is positioned closer to the bottom surface of the bottom than the projectile body, and the tank descends against the resilience as the waste liquid is accommodated in the tank. A plurality of solid stoppers that support the tank lowering position by supporting on the peripheral side,
The tank is disposed on the bottom side of the tank and is not in contact with the tank that does not contain waste liquid. When the waste liquid storage capacity approaches the specified storage capacity as the waste liquid is stored, the tank resists elasticity. And a measuring unit for measuring the tank weight in contact with the tank that descends,
The supply system is
The gist of the invention is that when the measuring unit measures the specified tank weight when the waste liquid storage capacity reaches the specified storage capacity, the distribution destination of the waste liquid is changed to a tank that does not store the waste liquid.

  The waste liquid recovery apparatus having the above configuration includes at least two tank units, and distributes and supplies the waste liquid to the tanks of the tank units via a supply system. In this way, the tank that receives the supply of the waste liquid is held by the holding unit, and receives the elastic force from the plurality of projectiles located on the periphery of the bottom surface of the tank and extending to the tank bottom surface on the side where the tank is lifted. . In the case of a tank that does not contain waste liquid, the tank is lifted and supported by the resilience of each of the projectiles, and the support locations are a plurality of locations on the periphery of the bottom surface of the tank. For this reason, the tank that does not contain the waste liquid has a relatively stable posture by lifting and supporting at a plurality of locations on the peripheral edge of the bottom surface of the tank. If a plurality of projectiles are arranged on the periphery of the tank bottom surface at an equal pitch on the same circumference from the center of the tank bottom surface, the tank posture can be further stabilized.

  In addition, the waste liquid recovery apparatus having the above-described configuration includes a plurality of solid stoppers in addition to the plurality of projectiles in the tank holding unit, and the stopper is located on the side of the bottom edge of the projectile. It arrange | positions so that it may extend to a bottom face side. For this reason, when a tank that does not contain waste liquid is arranged or replaced to be supported by a plurality of projectiles, even if the tank is inclined, the tank is supported by a solid stopper on the inclined side. Become. In addition, since the tank is lifted by receiving the elastic force of the slanted side projectile, the tank tilt can be restored.

  As the waste liquid is accommodated in the tank, the total weight including the tank and the waste liquid increases, so that the tank descends against the resilience of the projectile. Even if the tank tilts during the descending process, the tank tilt can be restored by the solid stopper and the projectile as described above. When the waste liquid is further stored in the tank, the tank is supported by the stopper while maintaining the tank lowering position by a plurality of solid stoppers positioned closer to the bottom edge than the projectile.

  The waste liquid recovery apparatus having the above configuration is provided with a measuring unit for measuring the tank weight disposed on the bottom side of the tank, but is not in contact with a tank that does not contain waste liquid. This can be easily secured by lifting and supporting the tank that does not contain the waste liquid by a plurality of projectiles around the bottom edge of the tank. And since the measuring unit is not in contact with a tank that does not contain waste liquid, when placing or replacing a tank that does not contain waste liquid to be supported by multiple projectiles, the measurement is performed on the bottom surface of the tank. It is possible to suppress a situation where the parts are brought into contact with each other. As a result, it is possible to avoid damage to the measuring unit when installing / replacing a tank that does not contain waste liquid, and to reduce work intentions to avoid contact in the work involved in the placement / replacement of the tank. Can also be achieved. In this case, as described above, even if a tank tilt occurs at this time, since it is non-contact, it can be prevented from contacting the bottom surface of the tank to the measurement unit, so the work intention to avoid contact can be reduced. Effectiveness of simplified work is increased.

  When the waste liquid storage capacity approaches the specified storage capacity as the waste liquid is stored, this measuring unit comes into contact with the tank that descends against the resilient force and measures the tank weight. Absent. In addition, when the waste liquid storage capacity reaches the specified storage capacity, the tank is held by a plurality of solid stoppers and the tank lowering position is maintained, so that the dunk weight can be measured by the measurement unit in a stationary state. When the measuring unit measures the specified tank weight when the waste liquid storage capacity reaches the specified storage capacity, the supply system changes the waste liquid distribution destination to a tank that does not store the waste liquid. It is possible to avoid excessive waste liquid storage. In this case, in order to replace a tank whose waste liquid storage capacity has reached the specified storage capacity (hereinafter referred to as a full tank) with a tank that does not contain waste liquid, the full tank should be moved away from the measuring unit by a cargo handling device such as a crane or a lift. In this case, the intention to avoid contact can be reduced.

It is explanatory drawing which shows schematic structure of the waste-liquid collection | recovery apparatus 100 as an Example of this invention. It is explanatory drawing which shows the positional relationship of a tank and another apparatus overlooking a tank. It is explanatory drawing which shows the original mode which started the waste liquid distribution to the tank 152 of the tank unit 150A. It is explanatory drawing which shows a mode that waste liquid accommodation became full. It is explanatory drawing which shows a mode that the waste liquid distribution destination switched. It is explanatory drawing which shows typically the mode of the weight measurement by the load cell 188 of the tank 152 supported by the stopper 186. FIG. It is explanatory drawing which shows the problem of a prior art.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a schematic configuration of a waste liquid recovery apparatus 100 as an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a positional relationship between the tank and other devices overlooking the tank. FIG. 1 shows a state in which the waste liquid is not accommodated.

  The waste liquid recovery apparatus 100 is connected to a catalyst electrode formation process section in a fuel cell manufacturing apparatus (not shown), and recovers the waste liquid of the process section. In the process of forming the catalyst electrode, for example, a catalyst dispersion liquid in which a metal such as platinum acting as a catalyst for causing an electrochemical reaction between hydrogen and oxygen is dispersed in fine particles is spray-coated on the surface of the electrolyte membrane. Therefore, an excessive coating liquid is generated as a waste liquid. The waste liquid recovery apparatus 100 stores this waste liquid in a tank as will be described later.

  As shown in FIG. 1, the waste liquid recovery apparatus 100 includes a waste liquid supply unit 120, two tank units 150A and 150B, and a tank holding unit 180 for each tank unit. Both the tank units and the respective tank holding units 180 are disposed inside the oil pan 200. The oil pan 200 is an open container formed of a steel plate such as stainless steel having high corrosion resistance, and stores waste liquid leaked during waste liquid storage. The oil pan 200 is equipped with a float sensor 202, which detects the level of the leaked waste liquid in the oil pan 200 and transmits the detection signal to the control device 210 described later. Control by the control device 210 that has received this detection signal will be described later.

  The tank unit 150A and the tank unit 150B have the same configuration, and individually store waste liquid. Hereinafter, the tank unit 150A will be described as an example, the configuration thereof will be described, and the tank unit 150B will be denoted by the same reference numeral. The tank unit 150A has a tank 152 as a main member, and various members are attached thereto. The tank 152 is provided with a bottom plate 154 for reinforcement on the bottom side integrally with a hollow waste liquid storage location in the upper part thereof, and a hook 160 and a cap 170 on the ceiling side. The tank 152 includes a bottom plate 154 and is made of a steel plate such as stainless steel having high corrosion resistance. The bottom plate 154 is hollow for weight reduction, and includes a through hole 156 that penetrates from the front side of the sheet of FIG. 1 to the back side. As shown in FIG. 2, the through hole 156 serves as an insertion hole for the lift fork Fc when the tank is replaced. The hook 160 is used for hanging by a lift during tank replacement or the like. The cap 170 is a so-called one-touch type cap that is configured to be detachable from the tank 152, and is connected to the flexible hose 172 to introduce waste liquid into the tank 152.

  The tank holding unit 180 for each tank unit includes a holding plate 182 on which the tank 152 is placed, a plurality of coil springs 184 and stoppers 186 extending to the bottom surface side of the tank 152, a load cell 188, and a proximity sensor 190 for each tank. Is provided. As shown in FIG. 2, the coil spring 184 is disposed on the periphery of the tank bottom surface at an equal pitch from the center of the tank bottom surface of the tank 152, with one end fixed to the oil pan 200 and the other end fixed to the holding plate 182. Yes. Each of the coil springs 184 exerts a resilient force on the side of lifting the tank to the tank 152 via the holding plate 182, and lifts this to the tank 152 that does not contain waste liquid by the resilient force. The tank 152 is supported. As the waste liquid is accommodated in the tank 152 that does not contain the waste liquid, the total weight including the tank 152 and the waste liquid increases, so that the tank 152 descends against the resilient force of the coil spring 184. The coil springs 184 arranged at equal pitches apply the elastic force to the tank lifting side to support the tank 152 via the holding plate 182.

  The stopper 186 is formed of a metal block or the like, and is positioned on the side of the bottom edge of the tank 152 relative to the coil spring 184, specifically, at each corner of the tank as shown in FIG. The stopper 186 has sufficient strength to support the tank 152 even when the tank 152 contains the waste liquid to the full water level. The stopper 186 comes into contact with the bottom surface of the tank 152, specifically, the bottom surface of the holding plate 182 when the above-described tank lowering accompanying the waste liquid storage in the tank 152 proceeds to a certain stage. Support the tank down position by supporting it. In this embodiment, when the waste liquid is stored at 1/3 to 1/2 of the internal volume (waste liquid storage volume) in the tank 152, the bottom surface of the holding plate 182 contacts the stopper 186, and the stopper 186 The tank 152 is supported at the tank lowering position.

  When the load cell 188 is located at the center of the bottom surface of the tank 152 and receives a load on the top surface thereof, the load cell 188 generates a detection signal corresponding to the load and transmits it to the control device 210 described later. Control by the control device 210 that has received this detection signal will be described later. As shown in FIG. 1, the load cell 188 is not in contact with the tank 152 that does not contain waste liquid so that a gap K remains between the bottom surface of the tank 152, specifically, the bottom surface of the holding plate 182. In the following situation, the load comes into contact with the bottom surface of the tank 152. When the waste liquid is stored in the tank 152 that does not contain the waste liquid, the tank 152 is supported by the stopper 186 while the tank lowering position is maintained as described above, and stops at that position. The load cell 188 receives the load from the tank 152 on the upper surface of the cell, and generates and transmits the detection signal at least after the gap K becomes zero at least when the tank is stationary. That is, the load of the tank 152 is detected as described above by installing the load cell 188 so that the height of the upper surface of the cell does not become lower than the height of the stopper 186.

  The proximity sensor 190 is held by a bracket (not shown), detects whether the tank 152 is placed on the holding plate 182, and transmits a detection signal to the control device 210. Note that, in place of the proximity sensor 190, a sensor that detects a separation between the bottom surface of the holding plate 182 and the top surface of the stopper 186 can detect whether the tank 152 is placed on the holding plate 182.

  The waste liquid supply unit 120 includes a main pipeline 122, a branch pipeline 124 branched from the pipeline, and open / close valves 126A and 126B incorporated in the pipeline. The main pipe line 122 is connected to a catalyst electrode formation process unit in a fuel cell manufacturing apparatus (not shown), and guides catalyst metal-containing waste liquid generated in the process unit. The downstream side of the on-off valve 126A and the on-off valve 126B is a steel pipe line or a corrosion-resistant resin pipe that reaches the upper end of the flexible hose 172 of each tank unit described above, and the pipe line that reaches the flexible hose 172 is bent. An odor pipe 174 that rises vertically upward and is open at one end is provided in the straight line section in front of the place. Since the odor pipe 174 communicates with the tank 152 via the flexible hose 172, the odor is released so that the odor in the tank is released to the atmosphere. Since the on-off valves 126A and 126B in the branch pipe 124 are driven based on a control signal from the control device 210, the waste liquid supply unit 120 cooperates with the control device 210 to discharge waste liquid containing catalyst metal such as platinum. It distributes and supplies to the tank 152 of each said tank unit. The branch pipe 124 and the opening / closing valves 126A and 126B located above the tank 152 are arranged at a sufficient distance from the tank ceiling, which hinders replacement of the tank 152 using a lift or a crane. There is no.

  The control device 210 is constituted by a so-called microcomputer having a CPU, a ROM, a RAM and the like for executing a logical operation, and inputs the sensor signals of the load cell 188, the float sensor 202, the proximity sensor 190, etc. described above, and a waste liquid recovery device Controls the entire 100. For example, if the detected water level of the float sensor 202 is a water level that requires the removal of the leaked waste liquid in the oil pan 200, the waste liquid suction device (not shown) of the oil pan 200 is driven to remove the leaked waste liquid, and the fact that the waste liquid leaks is indicated. And a buzzer sound. At the same time, the control device 210 controls the closing of both the on-off valve 126A and the on-off valve 126B of the branch pipe 124. When there is no tank detection signal from the proximity sensor 190, it is determined that the tank is not installed, and the on-off valve 126A or the on-off valve 126B on the side without the detection signal is controlled to close the pipe to stop the waste liquid distribution. Conversely, the opening / closing valve 126A or the opening / closing valve 126B on the side of the tank detected by the proximity sensor 190 is controlled to open the pipe, and the distribution of the waste liquid to the tank 152 is started. Along with the start of the waste liquid distribution, tank load monitoring based on the input of the load cell 188 is executed.

  Next, how the waste liquid is distributed to the tank 152 of each tank unit will be described. FIG. 3 is an explanatory diagram showing an initial state of the waste liquid distribution to the tank 152 of the tank unit 150A, FIG. 4 is an explanatory diagram showing a state where the waste liquid storage is full, and FIG. It is explanatory drawing which shows a mode.

  In FIG. 1, since the tanks 152 of both the tank units 150A and 150B are detected by the proximity sensor 190, the waste liquid can be distributed to any tank unit. Since the controller 210 initially distributes the fuel to the tank unit 150A, the control device 210 controls the opening of the on-off valve 126A. As a result, as shown in FIG. 3, the waste liquid is distributed and supplied to the tank 152 of the tank unit 150A. Note that a tank unit selection switch may be provided in the control device 210, and the initial distribution destination may be determined by operating the switch.

  When the waste liquid is stored in the tank 152 of the tank unit 150A, the tank 152 descends against the elastic force of the coil spring 184 as described above. Before starting the waste liquid storage, of course, when the tank is lowered, the tank 152 causes the spring force of the coil springs 184 arranged at an equal pitch as shown in FIG. And is supported by a coil spring 184. Since these tank support points are located at a plurality of circumferentially equal pitches from the center of the tank, the tank 152 has a relatively stable posture not only in the state in which the waste liquid is not stored but also during the tank descent accompanying the waste liquid storage. take.

  When waste liquid storage proceeds more than shown in FIG. 3, and the storage amount reaches 1/3 to 1/2 of the internal volume (waste liquid storage volume) in the tank 152 described above, as shown in FIG. The bottom surface of the holding plate 182 comes into contact with the top surface, and the tank 152 is supported at 186 at each corner of the tank (see FIG. 2). In parallel with this, the gap K between the cell upper surface of the load cell 188 and the bottom surface of the holding plate 182 becomes zero, and thereafter, the load of the tank 152 in the load cell 188, specifically, the weight of the tank 152 and the weight of the stored waste liquid The weight of the holding plate 182 is detected by the load cell 188, and the detection signal is sent to the control device 210. Then, when the water level of the stored waste liquid reaches the specified full water level, the control device 210 inputs a detection signal corresponding to the full water level from the load cell 188, and closes the opening / closing valve 126A that has been the pipe opening control until then. Control, and the opening / closing valve 126B is set to pipe opening control. As a result, as shown in FIG. 5, the waste liquid distribution destination is changed from the tank 152 of the tank unit 150A to the tank 152 of the tank unit 150B that does not contain the waste liquid. Distribution and containment can be reliably avoided. The signal from the load cell 188 includes the weight of the empty tank 152 and the weight of the holding plate 182, but these weights are stored in the control device 210 in advance. It is possible to detect the full storage of the waste liquid by the detection signal.

  In order to replace the tank 152 (full tank) of the tank unit 150A whose waste liquid storage capacity has become the specified storage capacity, the control device 210 drives and controls a lamp, a buzzer, etc. (not shown) to notify that effect. The worker who has received this removes the cap 170 on the tank ceiling from the tank 152 and then inserts the lift fork Fc into the through hole 156 of the bottom plate 154 as shown in FIG. Engage the wire hook and lift the full tank and remove it from the holding plate 182. Next, in preparation for the next waste liquid storage, an empty tank 152 that does not store waste liquid is placed on the holding plate 182 from above by a lift fork Fc or a ball suspension, and the cap 170 is connected to the tank 152 that has already been placed. When the empty tank 152 is placed in this manner, the proximity sensor 190 detects the tank, so that the control device 210 receives this detection signal and removes the tank unit 150A having the empty tank 152 from the next time. Distribution destination.

  The waste liquid recovery apparatus 100 of the present embodiment described above performs support of the tank 152 by the coil springs 184 arranged at equal circumferential pitches, and support by the stoppers 186 at each corner of the tank when the waste liquid storage progresses. . Therefore, when the empty tank 152 is placed on the holding plate 182, even if the tank 152 is inclined, the tank 152 can be supported by the stopper 186 on the inclined side and the coil spring 184 on the inclined side. Since the tank 152 is lifted on the inclined side in response to the elastic force, the tank inclination can be restored. In this case, even when the tank 152 descends as the waste liquid is stored in the tank 152, the tank support is provided by the coil spring 184 and the stopper 186. Even if it happens, the tank inclination can be restored as described above. As the waste liquid is further accommodated, the tank 152 is supported by the plurality of stoppers 186 positioned closer to the tank bottom surface than the coil spring 184 while maintaining the tank lowering position.

  The load cell 188 has its upper surface in contact with the bottom surface of the holding plate 182 in a tank stationary state where the tank 152 is supported by the stopper 186, and before that, a gap K is formed between the load cell 188 and the bottom surface of the holding plate 182. . For this reason, when the tank 152 whose waste liquid storage capacity has become the specified storage capacity is lifted and removed from the holding plate 182 and then the empty tank 152 that does not store waste liquid is placed on the holding plate 182 and replaced, the holding plate 182 Since the tank 152 is placed on the bottom surface of the holding plate 182, it is possible to suppress a situation in which the upper surface of the load cell 188 is brought into contact with the bottom surface of the holding plate 182. As a result, it is possible to avoid damage to the load cell 188 when installing or replacing the tank 152 that does not contain waste liquid, and to reduce work intentions for avoiding contact in the work accompanying the installation or replacement of the tank 152. Simplification can also be achieved. In this case, even if the tank inclination as described above occurs with the placement of the tank, since the gap K is formed, it is possible to prevent the bottom surface of the holding plate 182 from contacting the top surface of the load cell 188. The work intention to avoid contact can be reduced, and the effectiveness of simplifying the work is enhanced.

  When removing the full tank 152 whose waste liquid capacity has reached the specified capacity from the holding plate 182, the full tank 152 can be lifted away from the load cell 188 by a cargo handling device such as a crane or a lift. Good. Therefore, even when the tank is removed, the intention to avoid contact can be reduced.

  Further, in the waste liquid recovery apparatus 100 of the present embodiment, the flexible hose 172 is used up to the cap 170 attached to the tank 152 on the tank ceiling, and the pipe line upstream of the hose is a steel pipe line or a corrosion-resistant resin. It was a pipeline. In addition, the odor pipe 174 is raised vertically upward and communicated with the tank 152 via the flexible hose 172 in the straight line section before the bent portion of the pipe. Eliminate odors. This eliminates the need for a device structure that eliminates odor in the tank itself.

  As mentioned above, although the embodiment of the present invention has been described in the embodiments, the present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes without departing from the gist thereof. Is possible. For example, in the above embodiment, the coil spring 184 is fixed to the holding plate 182 at one end thereof, but the holding plate 182 is omitted, and the coil spring is placed on the bottom surface of the tank 152, specifically, the bottom surface of the bottom plate 154. The tank 152 may be supported by the coil spring 184 by bringing one end of the 184 into contact.

  Further, the number of tank units can be three or more depending on the scale and frequency of waste liquid recovery, and the shape of the tank 152 can be various, such as a cylindrical shape. In addition, other load measurement sensors instead of the load cell 188 can be used.

  FIG. 6 is an explanatory view schematically showing the state of weight measurement by the load cell 188 of the tank 152 supported by the stopper 186. In FIG. 6, among the stoppers 186 (see FIG. 2) located at the corners of the bottom surface of the tank 152, the two left stoppers 186 and the two right stoppers 186 in FIG. It was assumed that the two stoppers 186 on the right side were lowered. Although this difference in height leads to the inclination of the tank 152, it is very small with respect to the tank specifications (vertical and horizontal dimensions), so the tank 152 is shown to be significantly inclined in the figure. The degree of inclination is small and apparently the tank inclination is not so perceived. In addition, the load cell 188 was positioned on the side of the stopper 186 on the right side of the center of the tank in FIG. 2 with the height of the upper surface of the cell being the same as or slightly lower than the height of the stopper 186 having a high height. The two stoppers 186 on the right side can be made higher than the left side, and the two upper stoppers 186 in FIG. 2 can be made higher than the lower side, or vice versa.

  This has the following advantages. When the waste liquid is stored in the tank 152 and the tank 152 descends against the coil spring 184, the tank 152 is first supported by two stoppers 186 having a high height. In this state, the elastic force of the coil spring 184 acts on the tank 152 on the side of the stopper 186 having a low height, and the tank 152 is composed of two stoppers 186 having a high height and the coil spring 184 on the side having a low height. Supported. When the waste liquid recovery further proceeds, the tank 152 descends against the coil spring 184 on the side of the stopper 186 having a low height. At substantially the same time, the tank 152 also comes into contact with the load cell 188, so that the tank weight is detected (measured) by the load cell 188, and the tank 152 is inclined with the supporting point by the high stopper 186 as a fulcrum. The weight is hung on the load cell 188. In this case, since the tank 152 is always in contact with the two high stoppers 186 and the load cell 188 and is supported at these three points, the tank 152 can be reliably secured only by adjusting the height difference of the stopper 186 and the cell height of the load cell 188. The tank weight can be measured. In this case, since the load cell 188 is positioned on the right stopper 186 side in the figure with a low height, the three contact points of the two high stoppers 186 and the load cell 188 are widened, and the tank The support can be stabilized.

DESCRIPTION OF SYMBOLS 100 ... Waste liquid collection | recovery apparatus 120 ... Waste liquid supply part 122 ... Main pipe 124 ... Branch pipe 126A ... Open / close valve 126B ... Open / close valve 150A ... Tank unit 150B ... Tank unit 152 ... Tank 154 ... Bottom plate 156 ... Through-hole 160 ... Hook 170 ... Cap 172 ... Flexible hose 174 ... Odor tube 180 ... Tank holding unit 182 ... Holding plate 184 ... Coil spring 186 ... Stopper 188 ... Load cell 190 ... Proximity sensor 200 ... Oil pan 202 ... Float sensor 210 ... Control device K ... Gap Fc ... lift fork

Claims (1)

A waste liquid recovery device for recovering a waste liquid containing a metal that acts as a catalyst,
At least two tank units having a tank for storing the waste liquid;
A supply system for distributing and supplying the waste liquid to the tank of the tank unit;
A tank holding unit for holding the tank,
The holding unit is
The tank is disposed at the periphery of the bottom surface of the tank so as to extend toward the bottom surface of the tank, and exerts a resilience on the side where the tank is lifted to the front tank. A plurality of projectiles lifted by force to support the tank;
The tank is disposed so as to extend toward the bottom surface of the tank and is positioned closer to the bottom surface of the bottom than the projectile body, and the tank descends against the resilience as the waste liquid is accommodated in the tank. A plurality of solid stoppers that support the tank lowering position by supporting on the peripheral side,
The tank is disposed on the bottom side of the tank and is not in contact with the tank that does not contain waste liquid, and resists the elasticity when the waste liquid storage capacity approaches a specified storage capacity as the waste liquid is stored. A measuring unit that measures the weight of the tank in contact with the tank that descends
The supply system is
A waste liquid recovery device that changes a distribution destination of the waste liquid to a tank that does not contain waste liquid when the measuring unit measures a specified tank weight when the waste liquid storage capacity reaches the specified storage capacity.

Images