Nuclear medicine diagnosis and treatment waste liquid pretreatment unit and application method

Abstract

The invention discloses a nuclear medicine diagnosis and treatment waste liquid pretreatment unit and an application method. The nuclear medicine diagnosis and treatment waste liquid pretreatment unit comprises a waste liquid temporary storage pool communicated with a nuclear medicine diagnosis and treatment waste liquid outlet; the solid-liquid treatment module A and the solid-liquid treatment module B have the same structure and are connected in parallel; wherein each solid-liquid treatment module comprises a dry-wet separator communicated with a discharge pipe of the waste liquid temporary storage pool; the solid content treatment pond A and the solid content treatment pond B are matched with the solid content discharge end of the dry-wet separator; a filtrate discharge end of the dry-wet separator is communicated with a solid-liquid separation unit of the centrifugal machine, and the solid content treatment tank A and the solid content treatment tank B are communicated with a hospital sewage discharge pipe network through discharge pipelines. The invention provides a pretreatment unit of a nuclear medicine diagnosis and treatment waste liquid treatment system which combines dynamic and static solid-liquid separation and an application method, and is characterized in that the nuclear medicine diagnosis and treatment waste liquid is subjected to dynamic and static two-stage solid-liquid separation, and the volume of solid content can be effectively reduced through the two-stage separation.

Description

Technical Field

[0001] The present invention relates to the field of nuclear wastewater treatment, and more specifically, to a nuclear medicine diagnosis and treatment wastewater pretreatment unit and an application method combining dynamic and static solid-liquid separation. Background Art

[0002] Compared with natural decay pools, using a nuclear medicine diagnosis and treatment waste liquid treatment system to treat nuclear medicine diagnosis and treatment waste liquid can significantly shorten the discharge time of the filtrate and reduce the temporary storage volume of solids. The main function of the pretreatment unit of the nuclear medicine diagnosis and treatment waste liquid treatment system is to effectively separate the solids and liquids of the nuclear medicine diagnosis and treatment waste liquid, minimize the volume of solids that need to be temporarily stored, and ensure the continuity of the treatment process. Based on this, the present invention designs a pretreatment unit of a nuclear medicine diagnosis and treatment waste liquid treatment system that combines dynamic and static solid-liquid separation, which is characterized by "dynamic and static two-stage solid-liquid separation" of the nuclear medicine diagnosis and treatment waste liquid, that is: using a dry-wet separator to perform a primary dynamic solid-liquid separation on the nuclear medicine diagnosis and treatment waste liquid, and then using an ultra-fine filter to perform a secondary static solid-liquid separation on the solids after the primary solid-liquid separation, which can effectively reduce the volume of solids. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages which will be described hereinafter.

[0004] In order to achieve these purposes and other advantages of the present invention, a nuclear medicine diagnosis and treatment waste liquid pretreatment unit is provided, comprising:

[0005] A temporary waste liquid storage tank connected to the nuclear medicine diagnosis and treatment waste liquid discharge outlet;

[0006] Two solid-liquid processing modules A and solid-liquid processing modules B having the same structure and connected in parallel;

[0007] Among them, each solid-liquid processing module includes:

[0008] A dry-wet separator connected to the discharge pipe of the waste liquid temporary storage tank;

[0009] Solids treatment tank A and solids treatment tank B matched with the solids discharge end of the dry-wet separator;

[0010] The filtrate discharge end of the dry-wet separator is connected to the solid-liquid separation unit of the centrifuge, and the solid content treatment tank A and the solid content treatment tank B are connected to the hospital sewage network through a discharge pipeline;

[0011] Each solid-liquid processing module and each content processing tank is used to separate, collect and temporarily store solid and liquid;

[0012] The waste liquid storage tank is used to collect and temporarily store waste liquid.

[0013] Preferably, the feed pipe of each solid content treatment tank is also connected to the flushing unit and the circulation pipeline respectively.

[0014] Preferably, each solid-liquid processing module comprises:

[0015] Frame;

[0016] An inner frame having a predetermined spacing from the outer frame to ensure that the filtrate has a predetermined temporary storage space and a diversion channel;

[0017] An ultra-fine filter that is attached to the inner wall of the inner frame in the form of an insert;

[0018] Wherein, the inner frame is provided with matching hydrophobic holes;

[0019] The edge of the ultra-fine filter is provided with a frame.

[0020] Preferably, each solids treatment tank is laterally provided with a detector channel for accommodating a radiation detector;

[0021] Each solid content treatment pool is provided with a sampling channel for sampling the isotope activity test in the solid content;

[0022] Each solids treatment tank and waste liquid temporary storage tank is equipped with a liquid level meter;

[0023] The filtrate discharge pipeline of each dry-wet separator is provided with a matching water quality detector.

[0024] An application method of a nuclear medicine diagnosis and treatment waste liquid pretreatment unit, comprising:

[0025] S1. Nuclear medicine radioactive waste liquid enters the waste liquid temporary storage tank. After reaching the predetermined fixed liquid level, the waste liquid is pumped into the dry-wet separator for initial dynamic solid-liquid separation;

[0026] S2. The filtrate after the initial dynamic solid-liquid separation enters the centrifuge solid-liquid separation unit, and the solids enter the solids treatment tank A, and are subjected to secondary solid-liquid separation through the ultra-fine filter in the solids treatment tank A;

[0027] S3. After the solid content treatment pool A has been continuously treated for 180 days, the nuclear medicine radioactive waste liquid is switched to the solid content treatment pool B, so that the solid content treatment pool A that participated in the treatment previously is left to stand for about 180 days, and after the nuclides decay naturally and pass the test, they are discharged into the hospital's sewage network. The cycle of the solid content alternately entering the solid-liquid separation / collection / temporary storage pools A and B is 180 days;

[0028] The water quality detector detects the filtrate discharged from the filtrate storage tank. If it exceeds the set normal range, the control system connected to the pretreatment unit will send an alarm signal to prompt that the working state of the dry-wet separator is abnormal or the cutting pump flow needs to be adjusted.

[0029] The present invention includes at least the following beneficial effects: the present invention designs a pretreatment unit of a nuclear medicine diagnosis and treatment waste liquid treatment system that combines dynamic and static solid-liquid separation, which is characterized by "dynamic and static" two-stage solid-liquid separation of the nuclear medicine diagnosis and treatment waste liquid, namely: a dry-wet separator is used to perform a primary dynamic solid-liquid separation on the nuclear medicine diagnosis and treatment waste liquid to ensure that its separation rate meets the needs, and then an ultra-fine filter is used to perform a secondary static solid-liquid separation on the solid content after the primary solid-liquid separation, so that its separation effect meets the needs, and the volume of the solid content can be effectively reduced through two-stage separation.

[0030] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the pretreatment unit of the nuclear medicine diagnosis and treatment waste liquid treatment system of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the solid content treatment tank of the present invention;

[0033] Figure 3 This is a workflow diagram of the pretreatment unit of the nuclear medicine diagnosis and treatment waste liquid treatment system of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0035] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0036] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The present invention designs a pretreatment unit of a nuclear medicine diagnosis and treatment waste liquid treatment system that combines dynamic and static solid-liquid separation. The pretreatment unit is characterized by performing "dynamic and static two-stage solid-liquid separation" on the nuclear medicine diagnosis and treatment waste liquid, that is, using a dry-wet separator to perform a primary dynamic solid-liquid separation on the nuclear medicine diagnosis and treatment waste liquid, and then using an ultra-fine filter to perform a secondary static solid-liquid separation on the solid content after the primary solid-liquid separation, which can effectively reduce the volume of the solid content.

[0039] It should be noted that the ultra-fine filter referred to in this article refers to a filter with a pore size of 100 to 1000 mesh, and the mesh size can be adaptively adjusted according to needs and the filter layer in which it is located.

[0040] 1. Unit composition

[0041] The pretreatment unit of the nuclear medicine diagnosis and treatment waste liquid treatment system mainly includes a waste liquid collection / temporary storage tank (also called) 1, two parallel structures of the same solid-liquid separation / collection / temporary storage module A 2 and solid-liquid separation / collection / temporary storage module B 3, a liquid level meter 4, a water quality detector 5, a valve 6 and a pump, and the structure is as follows Figure 1 As shown. Solid-liquid collection / separation / temporary storage module A and solid-liquid separation / collection / temporary storage module B are used alternately or simultaneously based on the principle of "one use and one storage / reserve". The pretreatment unit is connected with the nuclear medicine diagnosis and treatment waste liquid outlet, flushing unit, centrifuge solid-liquid separation unit, membrane solid-liquid separation unit and the hospital's sewage pipe network to achieve primary solid-liquid separation of nuclear medicine diagnosis and treatment waste liquid, and collect / temporarily store waste liquid and solids, as well as solids concentration and volume reduction and release and control discharge functions.

[0042] (1) Waste liquid collection / temporary storage pool

[0043] The waste liquid collection / temporary storage tank is connected to the nuclear medicine treatment waste liquid outlet and the solid-liquid collection / separation / temporary storage module pipeline, and its function is to collect and temporarily store the waste liquid generated in real time during nuclear medicine treatment activities. The liquid level meter detects the liquid level of the waste liquid collection / temporary storage tank in real time online and feeds it back to the control unit.

[0044] (2) Solid-liquid separation / collection / temporary storage module

[0045] The solid-liquid separation / collection / temporary storage module is composed of a dry-wet separator 20 and a solid collection / separation / temporary storage tank 21. Figure 1 shown.

[0046] 1) Dry and wet separator

[0047] The dry-wet separator 20 is connected to the waste liquid collection / temporary storage tank 1, the centrifuge solid-liquid separation unit (not shown), the solid content collection / separation / temporary storage tank 21 and the flushing unit (not shown) to achieve primary solid-liquid separation of nuclear medicine diagnosis and treatment waste liquid.

[0048] 2) Solids collection / separation / temporary storage pool

[0049] The solid content collection / separation / temporary storage tank is divided into a tank A and a tank B for solid content collection / separation / temporary storage with the same structure. The structure and composition of each tank are as follows: Figure 2 As shown, it includes an outer frame 210, an inner frame 211, an ultrafine filter 212, a detector channel 213 and a sampling port 214. The inner frame 211 is provided with matching filter holes 215. The outer frame 210 and the inner frame 211 have a certain interval to ensure that the filtrate has a certain temporary storage space and diversion channel. The ultrafine filter 212 is close to the inner wall of the inner frame in the form of a plug-in. The solid content collection / separation / temporary storage pool is connected to the dry-wet separator, the flushing unit, the centrifuge solid-liquid separation unit, the membrane solid-liquid separation unit and the hospital's sewage network. Pool A and pool B are used alternately or simultaneously based on the principle of "one use and one storage / reserve". The detector channel is a channel that runs horizontally through the solid content collection / separation / temporary storage pool and can accommodate a radiation detector. The sampling port is a sampling channel for isotope activity experiments in solid content.

[0050] (3) Liquid level meter

[0051] The liquid level meter 4 is placed in the solid content collection / separation / temporary storage module, and is used to detect the liquid level of the solid content and the filtrate in real time online, and feed it back to the control unit.

[0052] (4) Radiation detectors

[0053] The radiation detector is placed in the detector channel of the solid collection / separation / temporary storage module to detect the activity of the radioactive nuclides in the solid content in real time online and feed it back to the control unit.

[0054] (5) Water quality detector

[0055] The water quality detector 5 is placed on the drainage pipe 7 and is used to detect various water quality parameters of the filtrate in real time online and feed back to the control unit.

[0056] (6) Valve

[0057] The valve 6 is placed on the pipeline connecting the various devices of the pre-processing unit, and receives the control command of the control unit to realize the opening or closing of the pipeline.

[0058] (7) Pump

[0059] The cutting pump 70 and the water quality detector 5 are placed on the discharge pipe 7, and the sludge pump 80 is placed on the slag discharge pipe 8, receiving the control command of the control unit to realize the solid and liquid entering the centrifuge

[0060] Filtrate flow control and solid content emission control of separation unit.

[0061] 2. Workflow

[0062] The workflow of the pretreatment unit of the nuclear medicine diagnosis and treatment waste liquid treatment system is as follows: Figure 3 shown.

[0063] The system workflow is as follows:

[0064] The radioactive waste liquid of nuclear medicine enters the waste liquid collection / temporary storage tank through the feed pipe 1 in real time. When it reaches a certain liquid level, the valve and pump are opened to pump the waste liquid into the dry-wet separator. The filtrate after the primary solid-liquid separation of the dry-wet separator enters the solid-liquid separation unit of the centrifuge, and the solids enter the A tank. After 180 days, the solids are switched to the B tank. The solids in the A tank are left to stand for about 180 days for the nuclides to decay naturally. The activity of the nuclides detected by the radiation detector in the A tank is below the national control limit, and after passing the inspection by the third-party testing agency, it is discharged from the slag discharge pipe 1 into the hospital's sewage network. The cycle of the waste liquid alternately entering the A and B tanks is about 180 days. The A and B tanks can work alternately or simultaneously. Start the flushing unit when cleaning is required. The parameters and liquid level of the filtrate discharged from the discharge pipe 1 are detected by the water quality detector and exceed the set normal range. The control system sends an alarm signal to indicate that the working state of the vibrating screen is abnormal or the flow of the cutting pump needs to be adjusted and processed.

[0065] The above solution is only an illustration of a preferred embodiment, but is not limited thereto. When implementing the present invention, appropriate replacement and / or modification can be performed according to user needs.

[0066] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0067] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A nuclear medicine diagnosis and treatment waste liquid pretreatment unit, characterized in that: include: A temporary waste liquid storage tank connected to the nuclear medicine diagnosis and treatment waste liquid discharge outlet; Two solid-liquid processing modules A and solid-liquid processing modules B having the same structure and connected in parallel; Among them, each solid-liquid processing module includes: A dry-wet separator connected to the discharge pipe of the waste liquid temporary storage tank; Solids treatment tank A and solids treatment tank B matched with the solids discharge end of the dry-wet separator; The filtrate discharge end of the dry-wet separator is connected to the solid-liquid separation unit of the centrifuge, and the solid content treatment tank A and the solid content treatment tank B are connected to the hospital sewage network through a discharge pipeline; Each solid-liquid processing module and each content processing tank is used to separate, collect and temporarily store solid and liquid; The waste liquid storage tank is used to collect and temporarily store waste liquid.

2. The nuclear medicine diagnosis and treatment waste liquid pretreatment unit according to claim 1, characterized in that: The feed pipe of each solid content treatment tank is also connected to the flushing unit and the circulation pipeline respectively.

3. The nuclear medicine diagnosis and treatment waste liquid pretreatment unit according to claim 1, characterized in that: Each solid-liquid processing module includes: Frame; An inner frame having a predetermined spacing from the outer frame to ensure that the filtrate has a predetermined temporary storage space and a diversion channel; An ultra-fine filter that is attached to the inner wall of the inner frame in the form of an insert; Wherein, the inner frame is provided with matching hydrophobic holes; The edge of the ultra-fine filter is provided with a frame.

4. The nuclear medicine diagnosis and treatment waste liquid pretreatment unit according to claim 1, characterized in that: A detector channel for accommodating radiation detectors is disposed transversely on each solid content treatment tank; Each solid content treatment pool is provided with a sampling channel for sampling the isotope activity test in the solid content; Each solids treatment tank and waste liquid temporary storage tank is equipped with a liquid level meter; The filtrate discharge pipeline of each dry-wet separator is provided with a matching water quality detector.

5. An application method of the nuclear medicine diagnosis and treatment waste liquid pretreatment unit according to any one of claims 1 to 4, characterized in that: include: S1. Nuclear medicine radioactive waste liquid enters the waste liquid temporary storage tank. After reaching the predetermined fixed liquid level, the waste liquid is pumped into the dry-wet separator for initial dynamic solid-liquid separation; S2. The filtrate after the initial dynamic solid-liquid separation enters the centrifuge solid-liquid separation unit, and the solids enter the solids treatment tank A, and are subjected to secondary solid-liquid separation through the ultra-fine filter in the solids treatment tank A; S3. After the solid content treatment pool A has been continuously treated for 180 days, the nuclear medicine radioactive waste liquid is switched to the solid content treatment pool B, so that the solid content treatment pool A that participated in the treatment previously is left to stand for about 180 days, and after the nuclides decay naturally and pass the test, they are discharged into the hospital's sewage network. The cycle of the solid content alternately entering the solid-liquid separation / collection / temporary storage pools A and B is 180 days; The water quality detector detects the filtrate discharged from the filtrate storage tank. If it exceeds the set normal range, the control system connected to the pretreatment unit will send an alarm signal to prompt that the working state of the dry-wet separator is abnormal or the cutting pump flow needs to be adjusted.

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