CN102903411B - Liquid waste treating apparatus - Google Patents

Abstract

The invention provides that when the immersion membrane used in the radioactive waste treatment equipment of nuclear power plant is installed in the solid-liquid separation tank as the waste liquid treatment device, the treatment capacity of the radioactive waste liquid is increased and the simplicity of the replacement operation of the immersion membrane is improved. And a waste liquid treatment device that reduces the amount of radiation exposure to operators. The waste liquid treatment device of the present invention comprises: a water tank, which flows into the waste liquid and discharges filtered permeated water; a waste liquid inflow part, which allows the waste liquid to flow into the water tank; a plurality of immersion membranes arranged in a ring shape inside the water tank and are isolated from each other to filter foreign substances contained in the waste liquid flowing in through the waste liquid inflow part; a permeate water suction part sucks permeate water of the waste liquid passing through the immersion membrane and supplies it to the outside of the water tank; The air supply unit supplies compressed air to the immersion membrane to prevent foreign matter from adhering to the surface of the immersion membrane; the porous support plate supports the lower part of the immersion membrane and has a plurality of holes formed on the surface.

Description

Waste liquid treatment device

technical field

The present invention relates to a waste liquid treatment device, in particular to a method of adding a soaked hollow fiber membrane (hereinafter referred to as "soaked membrane") installed in the solid-liquid separation tank of the pretreatment equipment of the liquid radioactive waste treatment system of the nuclear power plant Set the quantity to increase the processing capacity, improve the convenience of operation and reduce the radiation risk of the operator when replacing the used immersion membrane.

Background technique

The submerged membrane is used in the pretreatment equipment of some nuclear power plant liquid radioactive waste treatment systems (Liquid Radwaste System).

These immersion membranes are set in the solid-liquid separation tank to perform primary treatment on the incoming radioactive waste liquid.

The immersion membrane has the function of removing turbid substances, organic and inorganic suspended solids present in the radioactive waste liquid.

The treatment process of the immersion membrane is designed to: use a centrifugal pump to form an appropriate range of vacuum in the permeate water capillary to inhale the permeate water. In order to prevent the pore blockage of the immersion membrane, the aerator at the bottom of the immersion membrane is continuously inflated. And it can be reversed periodically.

However, when the existing waste liquid treatment device arranges the immersed membranes in the solid-liquid separation tank, the immersed membranes are arranged in a straight line, so there is a problem that the number of installed immersed membranes is limited.

In addition, the operating method when replacing the submerged membrane used in the existing waste liquid treatment device is as follows. That is, when the upper cover of the solid-liquid separation tank is opened, the worker enters the water tank, and when approaching the immersion membrane in which radioactive particles are concentrated, disassembles the connectors of each suction port of the immersion membrane and the air inlet of the aerator. , then remove the used soaker membrane through the top of the sink. However, when such an immersion membrane replacement method is adopted, not only is it inconvenient to replace the immersion membrane, but also the worker is directly exposed to radiation, so there is a risk of excessive exposure to radiation.

In addition, the conventional waste liquid treatment apparatus has the following structure in the form of fixing the submerged membrane in the solid-liquid separation tank. That is, a submerged membrane is placed on a fixed porous support plate, and a special fixing device is provided. However, since the height of the immersion membrane that can be installed is limited at this time, it is not possible to install immersion membranes of various heights, and it takes a lot of time to attach and detach the immersion membrane, which has the problem of inconvenient work.

Contents of the invention

The present invention is proposed in order to solve the above-mentioned problems, and its purpose is to provide a waste liquid treatment device. The waste liquid treatment device is equipped with a soaked membrane applied to the radioactive waste liquid treatment equipment of a nuclear power plant on a solid waste liquid treatment device. When it is in the liquid separation tank, it can not only increase the treatment capacity of radioactive waste, improve the convenience of replacing the submerged membrane, and reduce the radiation exposure to the operator, but also can be used in general for the treatment of harmful /Toxic Chemicals.

In order to achieve the above object, the waste liquid treatment device provided by the present invention includes: a water tank, which flows into the waste liquid, and discharges filtered permeated water; a waste liquid inflow part, which flows into the waste liquid toward the inside of the water tank; a plurality of immersion membranes, along the Arranged in the water tank with an annular space to filter the foreign matter contained in the waste liquid flowing in through the waste liquid inflow part; the permeate water suction part sucks the permeate water of the waste liquid passing through the immersion membrane, to supply permeated water to the outside of the water tank; the air supply part supplies compressed air to the immersion membrane to prevent foreign matter from adhering to the surface of the immersion membrane; the porous support plate supports the lower part of the immersion membrane, and at the same time Multiple pores are formed on the surface.

At this time, the permeate water suction part includes: an upper permeate water pipe extending from the outside of the water tank to the upper side of the water tank; Suction pipeline; extending radially from the lower end of the permeate water suction pipeline, an annular permeate water suction capillary arranged in a ring on the upper side of the immersion membrane. The air supply part includes: an upper air line for supplying compressed air from the outside of the water tank to the upper side of the water tank; connected to the upper air line, surrounding the outer surface of the permeated water suction line , an air supply pipeline extending to the inside of the water tank; an annular air supply capillary tube extending radially from the lower end of the air supply pipeline and arranged in a ring on the upper side of the immersion membrane.

And, on the bottom surface of the annular permeate water suction capillary, the membrane connection sockets arranged corresponding to the number of the plurality of soaking membranes are connected to the suction nozzles arranged on the upper end of the soaking membranes through quick connectors .

And, the annular air supply capillary is connected to an air diffuser through a one-touch connector, wherein the air diffuser is connected to the air inflow port at the lower part of the immersion membrane.

Moreover, the permeate water suction pipeline is connected to the porous support plate through a rotating shaft, and the permeate water suction pipeline is driven by a motor to be rotatably connected.

In addition, a sealing flange is connected to the upper end of the water tank through which the permeated water suction line and the air supply line pass to maintain airtightness.

Also, the connection between the upper permeate water line and the permeate water suction line, the connection between the upper air line and the air supply line, and the permeate water suction line and the The connecting parts between the rotating shafts are detachably combined through connecting flanges.

Moreover, the connecting portion between the rotating shaft and the porous support plate is threadedly connected by a screw, so that the position of the porous support plate can be changed up and down.

In addition, the lower end of the rotating shaft is rotatably supported by a rotating shaft support member fixed to the bottom of the water tank, and a stopper for restricting rotation of the porous support plate is provided on one side inside the water tank.

Moreover, an openable and closable hatch door is provided on one side of the water tank for taking and taking out the submerged membrane.

In addition, one side surface of the water tank provided with the hatch door is further provided with a lead shielding plate for cutting off radiation.

According to the waste liquid treatment device of the present invention, the immersion membrane is arranged in a ring shape, which not only makes it easier to replace the immersion membrane arranged inside the solid-liquid separation tank while rotating, but also increases the durability of the immersion membrane in the inner space of the solid-liquid separation tank. Since the quantity is set, it has the effect of increasing the processing capacity of the radioactive waste liquid.

Also, according to the present invention, a lead shielding body for shielding radiation is arranged while a hatch door is provided on one side of the water tank, so that while the annular permeate water suction capillary and the annular air supply capillary connected with the soaking membrane are rotated, Since the immersion membranes are attached and detached one by one on the side outside the water tank, the ease of replacement of the immersion membranes can be improved and the radiation risk from radiation can be reduced.

In addition, according to the present invention, when fixing the submerged membrane, the vertically adjustable porous support plate is introduced, whereby submerged membranes of various heights can be installed, and the submerged membrane can be quickly attached and detached by adopting a one-touch connection method. Effect.

Furthermore, the present invention can be generally applied to devices for processing hazardous/poisonous substances in addition to being applied to the processing of radioactive waste liquid.

Description of drawings

Fig. 1 is a side view of the waste liquid treatment device provided by the present invention with the soaked membrane arranged in a ring;

Fig. 2 is a top view of the waste liquid treatment device provided by the present invention in which the submerged membrane is arranged in a ring;

Fig. 3 is a detailed view of the side hatch door side of the waste liquid treatment device provided by the present invention with the soaked membrane arranged in a ring;

Fig. 4 is a state view showing the opening state of the side hatch door of the waste liquid treatment device provided by the present invention in which the submerged membranes are arranged in a ring shape.

Explanation of main symbols: 100 is the solid-liquid separation tank, 101 is the water tank, 102 is the sealing flange, 104 is the waste liquid inflow part, 105 is the drainage pipeline, 110 is the upper permeable water pipeline, 111, 115, 121 are connecting flanges , 112 is the permeate water suction pipeline, 114 is the annular permeate water suction capillary, 116 is the membrane connection socket, 118 is the quick connector, 120 is the upper air pipeline, 122 is the air supply pipeline, 124 is the annular air supply capillary, 125 is a one-touch connector, 126 is an aerator, 130 is a soaking membrane, 131 is a suction nozzle, 132 is an air inlet, 140 is a porous support plate, 150 is a rotating shaft, 155 is a screw, 160 is a rotating shaft supporting part, 170 For a hatch door, 172 is a handle, 180 is a lead shielding body, 190 is a motor, and 192 is a chain.

Detailed ways

Hereinafter, the configuration and functions of preferred embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a side view of a waste liquid treatment device provided by the present invention, in which submerged membranes are arranged in a ring shape. Fig. 2 is a top view of the waste liquid treatment device provided by the present invention in which the submerged membranes are arranged in a ring shape.

The characteristics of the waste liquid treatment device of the present invention include increasing the waste liquid treatment capacity in the solid-liquid separation tank 100, improving the ease of replacement of the submerged membrane 130, and improving the connection and fixing methods of the submerged membrane 130.

In order to achieve such a purpose, the solid-liquid separation tank 100 of the wastewater treatment device of the present invention is composed as a whole to include: discharge the permeated water filtered after the waste liquid flows in, and discharge the concentrated waste liquid foreign matter through the drainage pipeline 105 at the lower end. A water tank 101; a waste liquid inflow portion 104 for allowing waste liquid to flow into the water tank 101; a plurality of immersion membranes 130 arranged in a ring and separated from each other in the water tank 101 to filter foreign matter contained in the waste liquid; The permeate water in the waste liquid that passes through the immersion membrane 130 is sucked and supplied to the permeate water suction part outside the water tank 101; compressed air is supplied to prevent foreign matter from adhering to the surface of the immersion membrane 130. The air supply part of the pore clogging phenomenon; the lower part of the immersion membrane 130 is supported so that the immersion membrane 130 is closely fixed on the upper side, and the porous support plate 140 is formed with a plurality of holes on the surface.

In the present invention, as a structure in which the submerged membrane 130 is arranged in a ring shape inside the water tank 101 of the solid-liquid separation tank 100, the permeate water suction part includes: The upper permeated water pipeline 110 on the side; the permeated water suction pipeline 112 that is connected to the upper permeated water pipeline 110 and extends to the inside of the water tank 101; extends in a diffused form from the lower end of the permeated water suction pipeline 112, An annular permeate intake capillary 114 is thus arranged in the form of a ring on the upper side of the immersion membrane 130 .

In this way, the annular permeate water suction capillary 114 connected to the immersion membrane 130 is arranged along the circumferential direction. The length of 114 increases to the multiple of pi of the original length, so the number of immersion membranes 130 can be increased to three times.

In addition, the air supply unit includes: an upper air line 120 for supplying compressed air from the outside of the water tank 101 to the upper side of the water tank 101; connected to the upper air line 120, surrounding the permeated water The air supply pipeline 122 arranged on the outer peripheral surface of the suction pipeline 112; extending from the lower end of the air supply pipeline 122 in a diffused shape, thereby a ring-shaped annular air supply capillary is arranged on the upper side of the immersion membrane 130 124.

In this way, the permeated water suction line 112 and the air supply line 122 on its outer surface form a double pipe in the form of an air jacket. As described later, the permeated water suction line 112 and the air supply line are driven by the motor 190 122 can be integrally rotated, so that the submerged membrane 130 can be easily replaced.

In addition, the bottom surface of the annular permeate water suction capillary 114 is equipped with a plurality of membrane connection sockets 116 corresponding to the number of a plurality of immersion membranes 130 arranged in a ring, and is connected to the immersion membrane 130 arranged in the immersion through the medium of a quick coupling (QuickCoupling). The suction nozzle 131 on the upper end of the membrane 130. Therefore, when the submerged membrane 130 is replaced, the submerged membrane 130 can be easily separated from the annular permeate water suction capillary 114 .

And, on the bottom surface of the annular air supply capillary 124 is connected an aerator 126 with a one-touch connector as a medium, wherein the aerator 126 is connected to the air inlet 132 arranged at the lower part of the plurality of immersion membranes 130 . Therefore, the aerator 126 can be easily separated from the annular air supply capillary 124 when the submerged membrane 130 is replaced.

Here, the quick connector and the one-touch connector are configured to facilitate coupling of the connection parts, and may be composed of known one-touch connection units in various forms.

In addition, the permeated water suction line 112 and the porous support plate 140 are combined by a rotating shaft 150 , and the lower end of the permeated water suction line 112 and the upper end of the rotating shaft 150 are detachably coupled by a connecting flange 115 .

Moreover, the upper end of the permeated water suction pipeline 112 is connected to the rotating shaft of the low-speed rotating motor 190 through a chain 192. When the submerged membrane 130 is replaced, if the motor 190 is driven, the permeated water suction pipeline will 112 and the air supply line 122 on its outer peripheral surface rotate integrally, and in conjunction with this, the rotating shaft 150 rotates together with the porous support plate 140 and the submerged membrane 130 installed on the porous support plate.

Here, the upper permeated water pipeline 110 is detachably connected to the permeated water suction pipeline 112 through a connecting flange 111 , and the upper air pipeline 120 and the air supply pipeline 122 are detachably connected through a connecting flange 121 . Separately connected, when the motor 190 is driven at a low speed for replacing the submerged membrane 130, in order to prevent the rotation interference caused by the upper permeate water pipeline 110 and the upper air pipeline 120, the connecting flange 111 , 121 can be decomposed and separated.

And, the upper end of the water tank 101 penetrated by the permeated water suction pipeline 112 and the air supply pipeline 122 is provided with a sealing flange 102 to close the through opening, thereby preventing the radioactive waste liquid from passing through the aerator 126 during the treatment process. The radioactive gas that may be generated in the water tank 101 while inflating leaks to the outside of the water tank 101 .

In addition, the rotating shaft 150 is combined with the porous supporting plate 140 by passing the lower end of the rotating shaft 150 through the porous supporting plate 140. The outer surface of the lower part of the rotating shaft 150 forms a screw 155, and the porous supporting plate inserted by the screw 155 Corresponding screw threads are formed on the inner surface of 140 to perform screw connection. Therefore, the porous support plate 140 is formed in such a structure that the position can change up and down along the screw thread of the screw rod 155 when rotating.

In addition, the lower end of the rotating shaft 150 is rotatably supported by a rotating shaft support member 160 fixed to the bottom surface 101 a of the water tank 101 .

In this way, the adjustment of the upper and lower positions due to the rotation of the porous support plate 140 can provide an action space for installing the quick connector 118 and the one-touch connector 125 connector when loading and unloading the soaking membrane 130, and can correspond to the soaking Therefore, the immersion membrane 130 of various heights can be provided.

Also, a stopper 142 that restricts the rotation of the porous support plate 140 is provided on the inner side of the water tank 101. As shown in this embodiment, the stopper 142 can be configured to rotate on the inner side of the water tank 101, To be fixed on the side of the porous support plate 140.

Figure 3 is a detailed view of the side hatch door side of the waste liquid treatment device provided by the present invention with the soaked membranes arranged in a ring, and Figure 4 shows the waste liquid treatment device provided by the present invention with the soaked membranes arranged in a ring State diagram for the configuration with the side hatch door open.

In the present invention, when the submerged membrane 130 is replaced, in order to allow the operator to quickly load and unload each submerged membrane 130 on the outer side of the water tank 101, one side of the water tank 101 is provided with a device for taking and placing the submerged membrane 130. Open and close hatch door 170 (Hatch Door).

The hatch door 170 is opened and closed by rotating the handle 172 and can be rotated to one side. Preferably, the edge of the hatch door 170 is provided with a sealing unit for preventing water leakage.

In addition, the side surface of the water tank 101 provided with the hatch door 170 is further provided with a lead shield 180 for shielding radiation, so that the radiation to the operator can be minimized.

Therefore, when performing the replacement operation of the submerged membrane 130, the operator opens the hatch door 170, disassembles the connecting flanges 111, 121 on the upper side of the water tank 101, and then releases the locking state of the stopper 142, and makes the motor 190 While rotating at a low speed, the quick connector 118 and the one-touch connector 125 are disassembled, and the used immersion membrane 130 is led out to the outside through the hatch door 170, thereby enabling easy replacement of a new immersion membrane.

Above, the solid-liquid separation tank 100 for treating radioactive waste liquid by the waste liquid treatment device of the present invention is described as an example, but the waste liquid treatment device of the present invention can also be used for the treatment of harmful/poisonous substances in addition to the treatment of radioactive waste liquid Those skilled in the art should know that various modifications and variations can be made without departing from the scope of the technical gist of the present invention.

Claims (10)

1. a liquid waste treating apparatus, comprises:

Tank, flows into waste liquid, and discharges the infiltration water filtered;

Waste liquid inflow part, makes waste liquid flow into described tank inner;

Multiple immersion type film, to circularize and mutually isolated in described tank internal placement, to be filtered through the foreign matter comprised in waste liquid that described waste liquid inflow part flows into;

Infiltration water sucting, is aspirated through the infiltration water of the waste liquid of described immersion type film, and it is outside to be supplied to described tank;

Air supply unit, to described immersion type film supply pressurized air, with the surface preventing foreign matter from adhering to described immersion type film;

Porous support plate, supports the bottom of described immersion type film, is formed with multiple hole on the surface simultaneously,

Wherein, described multiple immersion type film, infiltration water sucting, air supply unit and porous support plate can rotate together.

2. liquid waste treating apparatus according to claim 1, is characterized in that,

Described infiltration water sucting comprises: the top infiltration water pipeline extending to the upside of described tank from the outside of described tank; Be connected to described top infiltration water pipeline, and extend to the infiltration water suction line of described tank inside; Extend from the lower end of described infiltration water suction line with diffusion type, and the annular infiltration water being arranged to annular in the upside of described immersion type film sucks kapillary,

Described air supply unit comprises: supply compressed-air actuated upper air pipeline from the upside externally to described tank of described tank; Be connected to described upper air pipeline, surround the outside surface of described infiltration water suction line, and extend to the air feed conduit of described tank inside; Extend with diffusion type from the lower end of described air feed conduit, and be arranged to the annular air supply kapillary of annular in the upside of described immersion type film.

3. liquid waste treating apparatus according to claim 2, is characterized in that,

Be arranged in the quantity corresponding with the quantity of described multiple immersion type film the film gang socket that described annular infiltration water sucks the bottom surface of kapillary to be connected by the suction ozzle of rapid-acting coupling with the upper end being arranged in described immersion type film,

Described annular air supply kapillary is connected to aerator by single connector that touches, and wherein aerator is connected to the air inflow aperture of described immersion type film bottom.

4. liquid waste treating apparatus according to claim 2, it is characterized in that described infiltration water suction line is connected by rotating shaft with described porous support plate, described infiltration water suction line is connected into and can be rotated by the driving of motor.

5. liquid waste treating apparatus according to claim 2, the upper end that it is characterized in that described infiltration water suction line and the through described tank of air feed conduit is combined with closure fange, for maintenance impermeability.

6. liquid waste treating apparatus according to claim 4, it is characterized in that the connecting portion between described top infiltration water pipeline and described infiltration water suction line, the connecting portion between described upper air pipeline and described air feed conduit and the connecting portion between described infiltration water suction line and described rotating shaft are combined into can be separated by each joint flange.

7. liquid waste treating apparatus according to claim 4, is characterized in that described rotating shaft is connected to be screwed mode by screw rod with the connecting portion of described porous support plate, vertically changes to make the position of described porous support plate.

8. liquid waste treating apparatus according to claim 7, is characterized in that the bottom of described rotating shaft is rotatably supported by the spindle supporting component being fixed on the bottom surface of described tank,

The side of described tank inside possesses the retainer of the rotation limiting described porous support plate.

9. the liquid waste treating apparatus according to any one in claim 1 to 8, is characterized in that possessing hatch door to be opened/closed in the face, side of described tank, for picking and placeing described immersion type film.

10. liquid waste treating apparatus according to claim 9, is characterized in that a side of the described tank possessing described hatch door also possesses the lead shield body for shielding radioactive ray.