Nuclear medical waste liquid pretreatment unit based on static solid-liquid separation and application method

Abstract

The invention discloses a nuclear medical waste liquid pretreatment unit based on static solid-liquid separation and an application method, the nuclear medical waste liquid pretreatment unit comprises two solid-liquid treatment modules simultaneously communicated with a nuclear medical diagnosis and treatment waste liquid discharge port, and each solid-liquid treatment module comprises a plurality of solid-liquid treatment pools which have the same structure and are connected in series; each solid-liquid treatment tank comprises an outer frame; a preset interval is formed between the inner frame and the outer frame so as to ensure that the filtrate has a preset temporary storage space and a flow guide channel; the hyperfine filter screen is tightly attached to the inner side wall of the inner frame in a plug-in manner; and at least one solid-liquid treatment pond at the front end also comprises a hydrophobic plate which is tightly attached to the inner side wall of the superfine filter screen in an inserting piece form. According to the nuclear medical waste liquid pretreatment unit based on static solid-liquid separation and the application method, solid-liquid separation is conducted on nuclear medical diagnosis and treatment waste liquid through the multi-stage hyperfine filter screen, and the equipment and the size of the pretreatment unit can be greatly reduced.

Description

Technical Field

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

[0002] With the development of nuclear technology, the use of medical nuclides to diagnose and treat patient diseases is becoming more and more widespread. The treatment of a large amount of nuclear medical wastewater generated is an issue that cannot be ignored by hospitals. Nuclear medicine diagnosis and treatment wastewater is mainly human excrement and flushing water of nuclear medicine patients, which contains a certain amount of radioactive short-decay period isotopes. According to relevant national regulations, it takes about a year for nuclear medicine diagnosis and treatment wastewater to go from temporary storage, natural decay to controlled discharge. The use of a nuclear medicine diagnosis and treatment wastewater treatment system can speed up this process and significantly shorten the storage time.

[0003] In the nuclear medicine diagnosis and treatment waste liquid treatment system, the main function of the nuclear medicine diagnosis and treatment waste liquid pretreatment unit based on static solid-liquid separation is to effectively separate the solid-liquid 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 uses a multi-stage filter to achieve solid-liquid separation of nuclear medicine diagnosis and treatment waste liquid, which can reduce the equipment and volume of the pretreatment unit. Summary of the invention

[0004] 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.

[0005] In order to achieve these purposes and other advantages of the present invention, a nuclear medical waste liquid pretreatment unit based on static solid-liquid separation is provided, comprising a solid-liquid treatment module A and a solid-liquid treatment module B both connected to a nuclear medical diagnosis and treatment waste liquid discharge port, wherein the solid-liquid treatment modules each comprise a plurality of solid-liquid treatment tanks of the same structure and connected in series;

[0006] Each solid-liquid treatment tank includes:

[0007] Frame;

[0008] 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;

[0009] An ultra-fine filter that is attached to the inner wall of the inner frame in the form of an insert;

[0010] Wherein, the inner frame is provided with a matching hydrophobic hole I;

[0011] The at least one solid-liquid treatment tank located at the front end also includes: a hydrophobic plate in the form of a plug-in closely attached to the inner side wall of the ultra-fine filter;

[0012] Wherein, the hydrophobic plate is provided with a plurality of hydrophobic holes II whose pore diameter is larger than that of the ultra-fine filter.

[0013] Preferably, the hydrophobic plate is provided with a plurality of tooth-shaped hydrophobic nails on a side away from the inner frame side wall.

[0014] Preferably, the outer edge of the ultrafine filter is provided with a frame for easy insertion, and the later the processing level of the ultrafine filter is, the smaller the aperture of the ultrafine filter is.

[0015] Preferably, a detector channel for accommodating a radiation detector is disposed transversely on the solid-liquid treatment tank;

[0016] The solid-liquid treatment pool is provided with a sampling channel for sampling the isotope activity test in the solid content;

[0017] The solid-liquid treatment tank is provided with a liquid level meter, and the discharge pipeline of the last solid-liquid treatment tank is provided with a matching water quality detector.

[0018] Preferably, the discharge pipeline of the solid-liquid treatment pool at the front end is connected to the nuclear medicine treatment waste liquid discharge outlet and the flushing unit, and the discharge pipeline of the last solid-liquid treatment pool is connected to the centrifuge solid-liquid separation unit and the hospital sewage network respectively;

[0019] An application method of a nuclear medical waste liquid pretreatment unit based on static solid-liquid separation, comprising:

[0020] S1, nuclear medicine diagnosis and treatment waste liquid enters the solid-liquid treatment module A, the filtrate after primary solid-liquid separation enters the centrifuge solid-liquid separation unit, and the solid content is retained in the inner frame of the solid-liquid treatment module A;

[0021] S2. After the solid-liquid treatment module A has been continuously treating for 180 days, the nuclear medicine diagnosis and treatment waste liquid is switched to the solid-liquid treatment module B, so that the solid content treatment module A that participated in the previous treatment 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 solid-liquid treatment modules A and B exchanging and receiving waste liquid is 180 days;

[0022] When the filtrate discharged from the solid-liquid processing module is detected to be beyond the set normal range, the control system connected to the pretreatment unit sends an alarm signal to prompt that the working state of the solid-liquid processing module is abnormal or the cutting pump flow needs to be adjusted.

[0023] The present invention includes at least the following beneficial effects: The present invention designs a nuclear medical waste liquid pretreatment unit based on static solid-liquid separation, which is characterized by utilizing multi-stage ultra-fine filters to separate the solid and liquid of nuclear medical diagnosis and treatment waste liquid, which can greatly reduce the equipment and volume of the pretreatment unit.

[0024] 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

[0025] Figure 1 This is a block diagram of the composition of the pre-treatment unit of the nuclear medicine diagnosis and treatment waste liquid treatment system of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the front-end solid-liquid processing mold pool of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the hydrophobic plate of the ultra-fine filter of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the back-end solid-liquid processing mold pool of the present invention;

[0029] Figure 5 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

[0030] 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.

[0031] 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.

[0032] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the term is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and 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 of the present invention. In addition, the terms "Ⅰ" and "Ⅱ" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] 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.

[0034] 1. Unit composition

[0035] like Figure 1 As shown, the pretreatment unit of the nuclear medicine diagnosis and treatment waste liquid treatment system mainly includes two parallel-structured solid-liquid treatment modules (also called solid-liquid collection / separation / temporary storage modules, which are used to collect, separate and temporarily store solid and liquid) A1 and solid-liquid treatment module B2, a liquid level meter 3, a radiation detector 4, a water quality detector 5, multiple valves 6 and a pump, and the structure is as shown in FIG. Figure 1 As shown. Solid-liquid treatment module A1 and solid-liquid treatment module B2 are used alternately or simultaneously based on the principle of "one in use and one in 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 hospital sewage pipe network to achieve primary solid-liquid separation of nuclear medicine diagnosis and treatment waste liquid, and collect / temporarily store filtrate and solid content, as well as solid content concentration, volume reduction and release and control discharge functions.

[0036] (1) Solid-liquid collection / separation / temporary storage module

[0037] Each solid-liquid collection / separation / temporary storage module is composed of a plurality of solid-liquid collection / separation / temporary storage tanks 10 of the same structure connected in series. The structure of the solid-liquid collection / separation / temporary storage tank is as follows: Figure 2 and Figure 3 As shown, the first solid content collection / separation / temporary storage tank is composed of an outer frame Ⅰ11, an inner frame Ⅰ12, an ultrafine filter Ⅰ13, a hydrophobic plate 14, a detector channel Ⅰ (not shown) and a sampling port Ⅰ15. The inner frame Ⅰ12 is provided with a matching filter hole Ⅰ120, and the outer frame Ⅰ11 and the inner frame Ⅰ12 have a certain interval to ensure that the filtrate has a certain temporary storage space and diversion channel. The ultrafine filter Ⅰ13 and the hydrophobic plate 14 are in the form of plug-ins and are close to the inner wall of the inner frame. The hydrophobic plate 14 is provided with a plurality of hydrophobic holes 140 and protruding hydrophobic nails 141. The function is mainly to prevent paper and plastic sheets from being close to the ultrafine filter, thereby improving the filtration efficiency. The Ⅰ tank connected in series in the solid-liquid processing module A1 and the Ⅱ tank connected in series in the solid-liquid processing module B2 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 tank and can accommodate a radiation detector 4. Sampling port Ⅰ15 is the sampling channel for isotope activity test in solids.

[0038] 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.

[0039] Other solid-liquid collection / separation / temporary storage tanks such as Figure 4As shown, it is composed of an outer frame II 21, an inner frame II 22, an ultra-fine filter 23, a detector channel II 24 and a sampling port II 25. The inner frame II 22 is provided with a matching filter hole II 220, and there is a certain interval between the outer frame II 21 and the inner frame II 22 to ensure that the filtrate has a certain temporary storage space and a guide channel, and the ultra-fine filter II 23 is in the form of a plug-in close to the inner wall of the inner frame.

[0040] The ultra-fine filters of all solid-liquid collection / separation / temporary storage tanks are arranged in each solid-liquid collection / separation / temporary storage tank according to the principle of "coarse first and fine later". The waste liquid passes through multiple cascade-connected solid-liquid collection / separation / temporary storage tanks to achieve primary solid-liquid separation, and the filtrate enters the centrifuge solid-liquid separation unit, and the solids are retained in the inner frame. The detector channel is a channel that runs horizontally through the solid-liquid collection / separation / temporary storage tank and can accommodate a radiation detector 4. The sampling port is a sampling channel for isotope activity experiments in solids.

[0041] (2) Liquid level meter

[0042] The liquid level meter 3 is placed on the solid-liquid collection / separation / temporary storage module to detect the liquid levels of the solids and filtrate in the solid-liquid collection / separation / temporary storage module in real time and online, and feed back to the control unit.

[0043] (3) Radiation detectors

[0044] The radiation detector 4 is placed on the solid-liquid collection / separation / temporary storage module to detect the activity of radionuclides in the solids and filtrate in real time and feed it back to the control unit.

[0045] (4) Water quality detector

[0046] The water quality detector 5 is placed on the drainage pipe 1 and is used to detect various water quality parameters of the filtrate in real time online and feed back to the control unit.

[0047] (5) Valve

[0048] 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.

[0049] (6) Pump

[0050] The cutting pump 7 and the water quality detector 5 are placed on the discharge pipe 8, and the sludge pump 8 is placed on the slag discharge pipe 9, receiving the control command of the control unit to realize the solid and liquid entering the centrifuge

[0051] Filtrate flow control and solid content emission control of separation unit.

[0052] 2. Workflow

[0053] The workflow of the pretreatment unit of the nuclear medicine diagnosis and treatment waste liquid treatment system is as follows: Figure 5 The specific workflow is as follows:

[0054] Nuclear medicine diagnosis and treatment waste liquid enters the solid-liquid collection / separation / temporary storage module A1 through the feed pipe 1 in real time, and the filtrate after primary solid-liquid separation through each cascade solid-liquid collection / separation / temporary storage tank enters the centrifuge solid-liquid separation unit through the discharge pipe 1, and the solid content is retained in the inner frame of the cascade solid-liquid collection / separation / temporary storage tank. After 180 days, the waste liquid is switched to the solid-liquid collection / separation / temporary storage module B2. The solid content in the solid-liquid collection / separation / temporary storage module A1 is left to stand for about 180 days for the nuclides to decay naturally. The radiation detector 4 in the solid-liquid collection / separation / temporary storage module A1 detects that the activity of the nuclides is below the national control limit, and after passing the inspection of the three-party testing agency, it is released from the slag discharge pipe 1 and discharged into the hospital's sewage network. The nuclear medicine diagnosis and treatment waste liquid alternately enters the solid-liquid collection / separation / temporary storage module A1 and the solid-liquid collection / separation / temporary storage B2 for a period of 180 days. Start the flushing unit when cleaning is required. When the parameters and liquid level of the filtrate discharged from the discharge pipe 1 are detected by the water quality detector 5 and exceed the set normal range, the control system sends an alarm signal to indicate that the working state of the solid-liquid collection / separation / temporary storage tank is abnormal or the flow of the cutting pump needs to be adjusted and processed.

[0055] 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.

[0056] 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.

[0057] 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 medical waste liquid pretreatment unit based on static solid-liquid separation, characterized in that: It includes a solid-liquid processing module A and a solid-liquid processing module B which are both connected to the nuclear medicine diagnosis and treatment waste liquid discharge outlet, and each of the solid-liquid processing modules includes a plurality of solid-liquid processing tanks with the same structure and connected in series; Each solid-liquid treatment tank 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 a matching hydrophobic hole I; The at least one solid-liquid treatment tank located at the front end also includes: a hydrophobic plate in the form of a plug-in closely attached to the inner side wall of the ultra-fine filter; Wherein, the hydrophobic plate is provided with a plurality of hydrophobic holes II whose pore diameter is larger than that of the ultra-fine filter.

2. The nuclear medical waste liquid pretreatment unit based on static solid-liquid separation according to claim 1, characterized in that: The hydrophobic plate is provided with a plurality of tooth-shaped hydrophobic nails on a side away from the inner frame side wall.

3. The nuclear medical waste liquid pretreatment unit based on static solid-liquid separation according to claim 1, characterized in that: The outer edge of the ultra-fine filter is provided with a frame for easy insertion, and the further back the processing level of the ultra-fine filter is, the smaller the aperture of the ultra-fine filter is.

4. The nuclear medical waste liquid pretreatment unit based on static solid-liquid separation according to claim 1, characterized in that: A detector channel for accommodating a radiation detector is disposed transversely on the solid-liquid treatment tank; The solid-liquid treatment pool is provided with a sampling channel for sampling the isotope activity test in the solid content; The solid-liquid treatment tank is provided with a liquid level meter, and the discharge pipeline of the last solid-liquid treatment tank is provided with a matching water quality detector.

5. The nuclear medical waste liquid pretreatment unit based on static solid-liquid separation according to claim 1, characterized in that: The solid-liquid treatment pool at the front is connected to the nuclear medicine diagnosis and treatment waste liquid outlet and the flushing unit respectively. The discharge pipeline of the last solid-liquid treatment pool is connected to the centrifuge solid-liquid separation unit and the hospital sewage network respectively.

6. A method for using the nuclear medical waste liquid pretreatment unit based on static solid-liquid separation as claimed in any one of claims 1 to 5, characterized in that: include: S1, nuclear medicine diagnosis and treatment waste liquid enters the solid-liquid treatment module A, the filtrate after primary solid-liquid separation enters the centrifuge solid-liquid separation unit, and the solid content is retained in the inner frame of the solid-liquid treatment module A; S2. After the solid-liquid treatment module A has been continuously treating for 180 days, the nuclear medicine diagnosis and treatment waste liquid is switched to the solid-liquid treatment module B, so that the solid content treatment module A that participated in the previous treatment 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 solid-liquid treatment modules A and B exchanging and receiving waste liquid is 180 days; When the filtrate discharged from the solid-liquid processing module is detected to be beyond the set normal range, the control system connected to the pretreatment unit sends an alarm signal to prompt that the working state of the solid-liquid processing module is abnormal or the cutting pump flow needs to be adjusted.

Images