阅读说明：本技术 地下核电站气载放射性过滤系统 (Underground nuclear power station airborne radioactivity filtration system ) 是由 钮新强 张涛 刘海波 潘霄 金乾 刘爽 何杰 张顺 陈卫鹏 党莹颖 于 2019-09-06 设计创作，主要内容包括：本发明涉及地下核电站技术领域,公开了一种地下核电站气载放射性过滤系统,包括位于地下岩层内的安全壳、卸压洞室及地面水池,卸压洞室内设有备用管线组和过滤装置,过滤装置包括进气口、出气口及首尾分别与进气口和出气口连通的文丘里过滤器组,文丘里过滤器组包括若干个通过备用管线组内管线连通的过滤器,备用管线组上设有备用截止阀组,备用截止阀组包括若干个设置在管线上通过开闭实现过滤器串并联的截止阀,进气口通过卸压管与安全壳内连通,出气口通过卸压排出管线与地面烟囱连通,过滤装置还通过地面注入管线和地面排出管线与地面水池相连。本发明地下核电站气载放射性过滤系统,可根据事故严重程度灵活机动地设置接入的过滤器数量,容易实现在役更换,使用寿命长。(The present invention relates to underground nuclear power station technical fields, disclose a kind of underground nuclear power station airborne radioactivity filtration system, including the containment in rock stratum located underground, release cavern and ground pond, active redundancy pipeline group and filter device are equipped in release cavern, filter device includes air inlet, the venturi filter group that gas outlet and head and the tail are connected to air inlet and air outlet respectively, venturi filter group includes that several pass through the filter that active redundancy pipeline group gut line is connected to, active redundancy pipeline group is equipped with spare cut-off valve group, spare cut-off valve group includes that several are arranged on pipeline by being opened and closed the shut-off valve for realizing that filter is series-parallel, air inlet in relief tube and containment by being connected to, gas outlet is connected to by release discharge pipe with ground chimney, filter device also injects pipeline and ground discharge pipe by ground and is connected with ground pond.The number of filters of access, in-service replacement easy to accomplish, long service life can be arranged flexiblely in underground nuclear power station airborne radioactivity filtration system of the present invention according to severity of injuries.)

1. a kind of underground nuclear power station airborne radioactivity filtration system, including the containment (2) in rock stratum located underground (1), release Cavern (3) and the ground pond (4) resting on the ground, it is characterised in that: active redundancy pipeline group is equipped in the release cavern (3) (5) and filter device (6), the filter device (6) include air inlet (61), gas outlet (62) and head and the tail respectively with the air inlet The venturi filter group (63) that mouth (61) is connected to gas outlet (62), the venturi filter group (63) include that several are logical The filter of active redundancy pipeline group (5) gut line (51) connection is crossed, the active redundancy pipeline group (5) is equipped with spare cut-off valve group (15), the spare cut-off valve group (15) includes that several are arranged on the pipeline (51) through the opening and closing realization filter Series-parallel shut-off valve, the air inlet (61) in relief tube (7) and the containment (2) by being connected to, the gas outlet (62) it is connected to by release discharge pipe (8) with ground chimney (9), the filter device (6) also injects pipeline by ground (10) it is connected with ground discharge pipe (11) with the ground pond (4).

2. underground nuclear power station airborne radioactivity filtration system according to claim 1, it is characterised in that: the release cavern (3) top is equipped with the control hanging (12) for lifting by crane the filter.

3. underground nuclear power station airborne radioactivity filtration system according to claim 1, it is characterised in that: the active redundancy pipeline group (5) pipeline (51) in is arranged in netted interconnection, and the connecting node of the pipeline (51) passes through the shut-off valve and separates, After filter in the venturi filter group (63) is connected to by the pipeline (51), any number of filters Series connection and parallel connection are realized by the opening and closing of the shut-off valve.

4. underground nuclear power station airborne radioactivity filtration system according to claim 3, it is characterised in that: the active redundancy pipeline group (5) pipeline (51) in is arranged as four horizontally-arranged and four stringer interconnections, between the horizontally-arranged connecting node of the pipeline (51) four Separated by the shut-off valve, between upper three connecting nodes of (51) four tandem of pipeline by the shut-off valve every It opens, the venturi filter group (53) includes nine filters, and nine filters press three horizontally-arranged and three stringers arrangements, on The filter is equipped on the three horizontally-arranged pipelines between every two connecting node, between two connecting nodes The shut-off valve is located at the inlet end of the filter.

5. underground nuclear power station airborne radioactivity filtration system according to claim 1, it is characterised in that: the ground injection pipe The connectivity points of line (10) and the filter device (6) are located at the lower part of the filter device (6), the ground discharge pipe (11) It is located at the top of the filter device (6) with the connectivity points of the filter device (6).

6. underground nuclear power station airborne radioactivity filtration system according to claim 1, it is characterised in that: the filter device (6) it is located in the melt pit of release cavern (3) bottom.

7. underground nuclear power station airborne radioactivity filtration system according to claim 1, it is characterised in that: the release discharge pipe Line (8) is equipped with radioactivity monitor (13).

8. underground nuclear power station airborne radioactivity filtration system according to claim 1, it is characterised in that: the relief tube (7) It is equipped with air pump (14).

Technical field

The present invention relates to underground nuclear power station technical fields, and in particular to a kind of underground nuclear power station airborne radioactivity filtering system System.

Background technique

Nuclear island etc. is related to core workshop and is placed in underground by underground nuclear power station, and using the protection of subterranean body, containment role, limitation is latent Radioactive substance to Environment release, improve nuclear plant safety, for China's Nuclear Safety development provide new approaches.

And a big advantage of underground nuclear power station can be prevented from major accident airborne radioactivity uncontrolledly immediately to External environment release, causes radioactive pollution.In this regard, in the prior art mostly using the venturi of the sand beds of dry type and wet type Filtering is made into filtration system, but this mode lacks flexibility, and filtration capacity is non-adjustable, and caused by SE secondary emission contact scar filter Core inconvenience replacement.

Chinese invention patent application (publication date: February 15, publication number in 2017: CN106409370A) discloses one kind Low and intermediate level radioac disposition library and method with airborne radioactivity filtering emission function, utilize ventilative concrete and filtering fine sand layer The radioactive particulate in airborne radioactivity is crossed, but this filtering can generate reluctant radioactivity sand bed, and filtration capacity is true It is fixed, it is non-exchange.

Chinese invention patent application (publication date: 09 month 2014 24 days, publication number: CN104064238A) discloses one kind The passive washing filtering system of underground nuclear power station airborne radioactivity effluent, utilizes the radioactivity in washing filtering airborne radioactivity Particle, but program filtration capacity is single, and different filtration capacities cannot be selected according to severity of injuries, once investment makes With even if filtering a small amount of airborne radioactivity substance, which also will be whole contaminated, and system in-service cannot be replaced.

Summary of the invention

The purpose of the present invention is to the deficiencies of above-mentioned technology, provide a kind of underground nuclear power station airborne radioactivity filtering system System, the number of filters of access, and in-service replacement easy to accomplish can be arranged flexiblely according to severity of injuries, use the longevity Life length.

To achieve the above object, the underground nuclear power station airborne radioactivity filtration system designed by the present invention, including it is located at ground Containment, release cavern in lower rock stratum and the ground pond resting on the ground are equipped with active redundancy pipeline group in the release cavern And filter device, the filter device include that air inlet, gas outlet and head and the tail are connected to the air inlet and air outlet respectively Venturi filter group, the venturi filter group include the filtering that several are connected to by the active redundancy pipeline group gut line Device, the active redundancy pipeline group are equipped with spare cut-off valve group, and the spare cut-off valve group includes that several are arranged in the pipeline Upper to realize the series-parallel shut-off valve of the filter by opening and closing, the air inlet in relief tube and the containment by connecting Logical, the gas outlet be connected to by release discharge pipe with ground chimney, the filter device also by ground injection pipeline with Ground discharge pipe is connected with the ground pond.

Preferably, release cavern top is equipped with the control hanging for lifting by crane the filter.

Preferably, the pipeline in the active redundancy pipeline group is arranged in netted interconnection, and the connecting node of the pipeline is equal It is separated by the shut-off valve, after the filter in the venturi filter group is connected to by the pipeline, any number of institutes Stating filter can realize series connection and parallel connection by the opening and closing of the shut-off valve.

Preferably, the pipeline in the active redundancy pipeline group is arranged as four horizontally-arranged and four stringer interconnections, the pipeline four It is separated by the shut-off valve between horizontally-arranged connecting node, it is logical between upper three connecting nodes of four tandem of pipeline It crosses the shut-off valve to separate, the venturi filter group includes nine filters, and nine filters are horizontally-arranged and three by three Stringer is arranged, the filter, two companies are equipped between every two connecting node on the upper three horizontally-arranged pipelines Connect the inlet end that the shut-off valve between node is located at the filter, may be implemented filter described in minimum of one, at most The flexible access of nine filters.

Preferably, the connectivity points of the ground injection pipeline and the filter device are located at the lower part of the filter device, The connectivity points of the ground discharge pipe and the filter device are located at the top of the filter device, can make full use of cooling water It is heated rear density and reduces the natural driving force realization Natural Circulation risen.

Preferably, the filter device is located in release cavern bottom melt pit, convenient for by the water in the ground pond Introduce the filter device.

Preferably, the release discharge pipe is equipped with radioactivity monitor, carries out radiological measuring to the gas of filtering.

Preferably, the relief tube is equipped with air pump, controls the gas generated in the containment.

Compared with prior art, the present invention having the advantage that

1, lower embedding type venturi filter group is set using the radiation shield function of rock mass in release cavern, and by standby It is opened and closed with the selectivity of cut-off valve group, filter is series-parallel in realization venturi filter group, can be according to severity of injuries The number of filters of access is set flexiblely, has saved resource, extends service life；

2, by control hanging, the in-service replacement of filter easy to accomplish, further extend filter device uses the longevity Life.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of underground nuclear power station airborne radioactivity filtration system of the present invention；

Fig. 2 is a kind of structural schematic diagram of embodiment of venturi filter group in filter device in Fig. 1.

Each part numbers are as follows in figure:

Subterranean strata 1, containment 2, release cavern 3, ground pond 4, active redundancy pipeline group 5, filter device 6, relief tube 7, Release discharge pipe 8, ground chimney 9, ground injection pipeline 10, ground discharge pipe 11, control hanging 12, radioactivity monitor 13, air pump 14, spare cut-off valve group 15, pipeline 51, air inlet 61, gas outlet 62, venturi filter group 63, the first shut-off valve 101, the second shut-off valve 102, third shut-off valve 103, the 4th shut-off valve 104, the 5th shut-off valve 105, the 6th shut-off valve 106, Seven shut-off valves 107, the 8th shut-off valve 108, the 9th shut-off valve 109, the tenth shut-off valve 110, the 11st shut-off valve the 111, the 12nd Shut-off valve 112, the 13rd shut-off valve 201, the 14th shut-off valve 202, the 15th shut-off valve 203, the 16th shut-off valve 204, 17 shut-off valves 205, the 18th shut-off valve 206, the 19th shut-off valve 207, the 20th shut-off valve 208, first filter 301, Second filter 302, third filter 303, the 4th filter 304, the 5th filter 305, the 6th filter 306, the 7th mistake Filter 307, the 8th filter 308, the 9th filter 309.

Specific embodiment

The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2, underground nuclear power station airborne radioactivity filtration system of the present invention, including in rock stratum located underground 1 Containment 2, release cavern 3 and the ground pond 4 resting on the ground, active redundancy pipeline group 5 and filtering dress are equipped in release cavern 3 6 are set, filter device 6 is located in 3 bottom melt pit of release cavern, and filter device 6 includes air inlet 61, gas outlet 62 and head and the tail difference The venturi filter group 63 being connected to air inlet 61 and gas outlet 62, venturi filter group 63 pass through spare including several The filter of 5 gut line 51 of pipeline group connection, active redundancy pipeline group 5 are equipped with spare cut-off valve group 15, and spare cut-off valve group 15 is wrapped Include several and be arranged on pipeline 51 and the series-parallel shut-off valve of filter is realized by opening and closing, air inlet 61 by relief tube 7 with Connection in containment 2, relief tube 7 are equipped with air pump 14, and gas outlet 62 is connected to ground chimney 9 by release discharge pipe 8, is unloaded Discharge pipe 8 is pressed to be equipped with radioactivity monitor 13, filter device 6 also injects pipeline 10 and ground discharge pipe 11 by ground It is connected with ground pond 4, wherein the connectivity points of ground injection pipeline 10 and filter device 6 are located at the lower part of filter device 6, ground The connectivity points of face discharge pipe 11 and filter device 6 are located at the top of filter device 6.

In addition, the pipeline 51 in active redundancy pipeline group 5 is arranged in netted interconnection, the connecting node of pipeline 51, which passes through, is cut Only valve separates, and after the filter in venturi filter group 63 is connected to by pipeline 51, any number of filters can be by cutting Only series connection and parallel connection are realized in the opening and closing of valve.

In the present embodiment, the pipeline 51 in active redundancy pipeline group 5 is arranged as four horizontally-arranged and four stringer interconnections, pipeline 51 It is separated by shut-off valve between four horizontally-arranged connecting nodes, by cutting between upper three connecting nodes of 51 4 tandem of pipeline Only valve separates, specifically, as shown in Fig. 2, being followed successively by the first lateral shut-off valve 101, the second shut-off valve 102, third cut-off Valve 103, the 4th shut-off valve 104, the 5th shut-off valve 105, the 6th shut-off valve 106, the 7th shut-off valve 107, the 8th shut-off valve 108, 9th shut-off valve 109, the tenth shut-off valve 110, the 11st shut-off valve 111, the 12nd shut-off valve 112 and the 13rd cut-off of longitudinal direction Valve 201, the 14th shut-off valve 202, the 15th shut-off valve 203, the 16th shut-off valve 204, the 17th shut-off valve the 205, the 18th Shut-off valve 206, the 19th shut-off valve 207 and the 20th shut-off valve 208, venturi filter group 53 include nine filters, nine A filter presses three horizontally-arranged and three stringers arrangements, and a mistake is equipped between every two connecting node on upper three horizontally-arranged pipelines Filter, the shut-off valve between two connecting nodes is located at the inlet end of filter, specifically, as shown in Fig. 2, being followed successively by first Filter 301, the second filter 302, third filter 303, the 4th filter 304, the 5th filter 305, the 6th filter 306, the 7th filter 307, the 8th filter 308 and the 9th filter 309, in addition, 3 top of release cavern is equipped with lifting filtering The control hanging 12 of device.

After the lower generation major accident in locality, when only discharging a small amount of airborne radioactivity waste, according to the airborne radiation of release Property amount of waste calculate, it is only necessary to two filters can meet filtering emission requirement, if selection the 8th filter 308 and the 9th 309 two filter series connection of filter are come into operation, at this point, controlling the opening and closing of shut-off valve, series connection by spare cut-off valve group 15 The 8th filter 308 and the 9th filter 309 are accessed, i.e. opening the 13rd shut-off valve 201, the 17th shut-off valve 205, the tenth section Only valve 110, the 8th shut-off valve 108, the 9th shut-off valve 109, close other shut-off valves, that is, realize in venturi filter group 63 The series connection of 8th filter 308 and the 9th filter 309 accesses.Air pump 14, the airborne radiation generated in containment 2 are opened at this time Property be discharged into filter device 6 under the action of air pump 14 by relief tube 7, in filter device 6, airborne radioactivity passes through air inlet Mouth the 61, the 13rd shut-off valve 201, the 17th shut-off valve 205, the tenth shut-off valve 110, the 8th shut-off valve 108, the 8th filter 308, the 9th shut-off valve 109, the 9th filter 309, gas outlet 62 are successively filtered, and filtered gas is through radioactivity monitor 13 Monitor it is up to standard after through being discharged by release discharge pipe 8 by ground chimney 9.During the filtration process, 6 Nei Wenduyin of filter device is radiated Property filtering and increases, after temperature increases, cooling water in ground pond 4 injects pipeline 10 from 6 bottom of filter device stream through ground Enter, is expelled to ground pond 4 from 6 top of filter device via ground discharge pipe 11 under density contrast promotion after heated, it is complete The discharge function discharged at heat.

Likewise, when generating a large amount of airborne radioactivity wastes, airborne according to release is put after local lower generation major accident Injectivity waste amount calculates, and needs five filters that can just meet filtering emission requirement, combines in venturi filter group 63 at this time The operation residual capacity of portion's filter selects first filter 301, the second filter 302, the filtering of the 7th filter the 307, the 8th 309 5 filters of device 308 and the 9th filter come into operation, and first filter 301 and the series connection of the second filter 302, the Seven filters 307 and the series connection of the 8th filter 308, connect with the 9th filter 309 again after this two groups of in-line filters are in parallel.This When, the opening and closing of shut-off valve is controlled by spare cut-off valve group 15, equally can easily realize the purpose, specifically, opening the One shut-off valve 101, the second shut-off valve 102, the 15th shut-off valve 203, the 19th shut-off valve 207, the 13rd shut-off valve 201, 17 shut-off valves 205, shut-off valve the 7th 107, the 8th shut-off valve 108 and the 9th shut-off valve 109, close other shut-off valves.At this time Air pump 14 is opened, the airborne radioactivity generated in containment 2 is discharged into filter device 6 by relief tube 7 under the action of air pump 14 In, in filter device 6, airborne radioactivity passes through first filter 301, the second filter 302, the 7th filter the 307, the 8th Filter 308 and the filtering of the 9th filter 309, filtered gas through radioactivity monitor 13 monitor it is up to standard after through by unloading pressure Pipeline 8 is discharged by ground chimney 9 out.During the filtration process, 6 Nei Wenduyin radioactivity of filter device is filtered and is increased, temperature liter Gao Hou, the cooling water in ground pond 4 inject pipeline 10 through ground and flow into from 6 bottom of filter device, it is heated after in density contrast It is expelled to ground pond 4 from 6 top of filter device via ground discharge pipe 11 under promotion, completes the discharge function of heat release Energy.

The above are two different filter series-parallel systems, when an accident occurs, useless according to the airborne radioactivity of release Object amount can be with the use number of reasonable arrangement filter in conjunction with the operation residual capacity of 63 internal ramp of venturi filter group Amount and serial or parallel connection consume each filter equilibrium, while guaranteeing filter efficiency and quality, additionally it is possible to greatly increase Filter the service life of device 6.

In addition, in the major accident later period, after airborne radioactivity filters, according to 63 internal filter of venturi filter group Filtering residual capacity, will filter the low filter of residual capacity by controlling hanging 12 and hang out replacement, realize filter Labour replacement, further extends the service life of filter device 6.

Underground nuclear power station airborne radioactivity filtration system of the present invention utilizes the radiation shield function of rock mass in release cavern 3 Lower embedding type venturi filter group 63 can be set, and be opened and closed by the selectivity of spare cut-off valve group 15, realize venturi filtering Filter is series-parallel in device group 63, and the number of filters of access can be arranged flexiblely according to severity of injuries, saves Resource, extends service life；Meanwhile by controlling hanging 12, the in-service replacement of filter easy to accomplish further extends The service life of filter device 6.