CN104863631A - Optimization method for reducing harm of uranium ore gaseous effluents to surrounding environment - Google Patents
Optimization method for reducing harm of uranium ore gaseous effluents to surrounding environment Download PDFInfo
- Publication number
- CN104863631A CN104863631A CN201510191374.0A CN201510191374A CN104863631A CN 104863631 A CN104863631 A CN 104863631A CN 201510191374 A CN201510191374 A CN 201510191374A CN 104863631 A CN104863631 A CN 104863631A
- Authority
- CN
- China
- Prior art keywords
- formula
- return air
- wellhead
- gaseous effluent
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Treating Waste Gases (AREA)
Abstract
一种降低铀矿气态流出物对周边环境危害的优化方法，在铀矿回风井的井口加装一个锥形喷嘴，通过减小铀矿气态流出物出口的截面积，以增大出口流速和有效释放高度的方式来实现降低周边环境近地空气中污染物浓度的目的。锥形喷嘴出口直径的确定是利用回风井下风方向中心轴线处近地表气态流出物浓度与回风井井口直径Di之间的理论公式（10）计算出回风井下风方向中心轴上2000米范围内近地空气污染物浓度的分布，通过减小井口直径Di来降低井口周边空气污染物浓度，当污染物浓度不再随井口直径Di的减小有较大变化时，即能得到最优化的回风井井口直径Di，该井口直径Di即为锥形喷嘴出口直径，从而实现铀矿回风井周边气态污染物防控的优化。
An optimization method for reducing the harm of uranium ore gaseous effluent to the surrounding environment. A conical nozzle is installed at the wellhead of the uranium mine return air shaft, and the outlet flow rate and flow rate are increased by reducing the sectional area of the uranium ore gaseous effluent outlet. The way to effectively release the height is to achieve the purpose of reducing the concentration of pollutants in the surrounding environment near the ground. The outlet diameter of the conical nozzle is determined by using the theoretical formula (10) between the concentration of near-surface gaseous effluents at the central axis of the downwind direction of the return air shaft and the wellhead diameter D i of the return air shaft to calculate 2000 on the central axis of the downwind direction of the return air shaft. The concentration distribution of near-earth air pollutants within the range of meters, the concentration of air pollutants around the wellhead can be reduced by reducing the diameter of the wellhead D i , when the pollutant concentration no longer has a large change with the decrease of the wellhead diameter D i , the The optimized wellhead diameter D i of the return air shaft is obtained, and the wellhead diameter D i is the outlet diameter of the conical nozzle, so as to realize the optimization of the prevention and control of gaseous pollutants around the return air shaft of the uranium mine.
Description
技术领域 technical field
本发明涉及铀矿开采技术领域，特别是一种在铀矿开采过程中降低铀矿气态流出物对周边环境危害的优化方法。 The invention relates to the technical field of uranium ore mining, in particular to an optimization method for reducing the harm of uranium ore gaseous effluent to the surrounding environment during the uranium ore mining process.
背景技术 Background technique
在铀矿开采过程中会产生大量的放射性核素氡及其子体、铀矿尘等有害物质，这些铀矿工业废气、矿尘通过建在岩体2中的回风井1排放到大气中，排放到大气中的这些铀矿工业废气、矿尘会严重污染铀矿周边环境且危害工作人员或附近居民的健康。目前，对铀矿山气态流出物大多采用从回风井1近地表排放，因此铀矿回风井1周边地区一定范围内气态排放物浓度明显高于其他地区，致使矿区工作人员或附近居民受照剂量显著增高。 In the process of uranium mining, a large amount of harmful substances such as radionuclide radon and its daughters, uranium ore dust will be produced, and these uranium mine industrial waste gas and mine dust will be discharged into the atmosphere through the return air shaft 1 built in the rock mass 2 , These uranium mine industrial waste gas and mine dust discharged into the atmosphere will seriously pollute the surrounding environment of uranium mines and endanger the health of workers or nearby residents. At present, most of the gaseous effluents from uranium mines are discharged from the return air shaft 1 near the surface. Therefore, the concentration of gaseous emissions in a certain range around the uranium mine return air shaft 1 is obviously higher than that in other areas, causing the mine workers or nearby residents to be exposed. The dose was significantly increased.
发明内容 Contents of the invention
本发明的目的是克服现有技术的上述不足而提供一种降低铀矿气态流出物对周边环境危害的优化方法，通过改变铀矿回风井口径大小，增加气态流出物的有效释放高度来降低废气对周边环境的危害并确保回风井周边居民附加受照辐射剂量处于国家规定的剂量限值以内。 The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide an optimized method for reducing the harm of uranium ore gaseous effluent to the surrounding environment. The harm of exhaust gas to the surrounding environment and ensure that the additional radiation dose of residents around the return air shaft is within the dose limit specified by the state.
本发明所采用的技术方案是：一种降低铀矿气态流出物对周边环境危害的优化方法，在铀矿回风井的井口加装一个锥形喷嘴，通过减小铀矿气态流出物出口的截面积，以增大出口流速和有效释放高度的方式来实现降低周边环境近地空气中污染物浓度的目的。 The technical scheme adopted in the present invention is: an optimized method for reducing the harm of uranium ore gaseous effluent to the surrounding environment, and a conical nozzle is installed at the wellhead of the uranium ore return air shaft, and the outlet of uranium ore gaseous effluent is reduced. The purpose of reducing the concentration of pollutants in the air near the ground in the surrounding environment is achieved by increasing the outlet flow velocity and the effective release height.
研究表明：铀矿回风井气态污染物主要集中于井口周边2000米范围内，在此区域外受污染程度较低；平坦地形下污染物迁移扩散距离最远，且沿回风井下风方向中心轴上的污染物浓度最高。 The research shows that: the gaseous pollutants in the uranium mine return air shaft are mainly concentrated within 2000 meters around the well head, and the pollution degree outside this area is relatively low; the pollutants migrate and diffuse the farthest in flat terrain, and they are located along the center of the return air shaft in the downwind direction. Contamination concentrations are highest on the axis.
以高斯烟羽模型为基础推导在通风量和污染物排放量不变的情况下回风井的直径与近地空气污染物浓度的计算公式，通过该公式对回风井的井口进行优化设计，并利用该公式针对平坦地形回风井下风方向中心轴线2000米范围内的近地空气污染物水平进行优化。 Based on the Gaussian plume model, the calculation formula for the diameter of the return air shaft and the concentration of air pollutants near the ground is derived under the condition that the ventilation rate and pollutant discharge are constant, and the wellhead of the return air shaft is optimized by this formula. And use this formula to optimize the level of near-earth air pollutants within 2000 meters of the central axis of the downwind direction of the flat terrain return shaft.
首先推导出平坦地形回风井的井口直径与矿井下风方向中心轴线上近地表气态流出物浓度之间的理论公式，理论公式推导过程如下：根据回风井井口加锥形喷嘴前后气态流出物与锥形喷嘴直径之间的关系公式： Firstly, the theoretical formula between the diameter of the wellhead of the air return shaft in flat terrain and the concentration of gaseous effluent near the surface on the central axis in the downwind direction of the mine is derived. The relationship formula between the diameters of conical nozzles:
（1） (1)
式（1）中：S1为回风井井口的截面积，S2为锥形喷嘴嘴口的截面积，单位为m2；V1为加锥形喷嘴前的气态流出物出口速度，V2为加锥形喷嘴后的气态流出物出口速度，单位为m/s。 In formula (1): S 1 is the cross-sectional area of the wellhead of the return air well, S 2 is the cross-sectional area of the mouth of the conical nozzle, in m 2 ; V 1 is the exit velocity of the gaseous effluent before adding the conical nozzle, V 2 is the exit velocity of the gaseous effluent after adding a conical nozzle, in m/s.
根据式（1）求出加锥形喷嘴之后的气态流出物出口流速，再将求得的气态流出物出口流速表达式以及测量得到的气态流出物平均浓度代入气态流出物释放率公式： Calculate the outlet flow velocity of gaseous effluent after adding a conical nozzle according to formula (1), and then substitute the obtained expression of outlet flow velocity of gaseous effluent and the average concentration of gaseous effluent obtained by measurement into the formula of release rate of gaseous effluent:
（2） (2)
式（2）中：Q为释放率，单位为Bq·s-1；C0为气态流出物平均浓度，单位为Bq/m3；P为井口气态流出物流率，单位为m3/s；S为回风井和锥形喷嘴任一监测面的截面积，单位为m2；V是回风井和锥形喷嘴任一监测面气态流出物的平均流速，单位为m/s。 In formula (2): Q is the release rate, the unit is Bq·s -1 ; C 0 is the average concentration of gaseous effluent, the unit is Bq/m 3 ; P is the flow rate of gaseous effluent at the wellhead, the unit is m 3 /s; S is the cross-sectional area of any monitoring surface of the air return shaft and the conical nozzle, in m 2 ; V is the average flow velocity of the gaseous effluent on any monitoring surface of the return air shaft and the conical nozzle, in m/s.
根据式（2）求得气态流出物释放率与井径之间的关系： The relationship between gaseous effluent release rate and well diameter is obtained according to formula (2):
（3） (3)
式（3）中：Di为回风井井口直径，单位为m。 In the formula (3): Di is the diameter of the wellhead of the return air well, and the unit is m.
已知烟羽有效释放高度h与回风井井径以及气态流出物出口流速三者之间的关系： Known the relationship between the effective release height h of the plume, the diameter of the return air shaft and the outlet velocity of the gaseous effluent:
（4） (4)
式（4）中：h为回风井烟羽有效释放高度，单位为m；us 是回风井井口高度处平均风速，单位为m/s； hs为回风井井口离地面高度，单位为m。 In formula (4): h is the effective release height of the return air shaft plume, in m; u s is the average wind speed at the height of the return air shaft wellhead, in m/s; h s is the height of the return air shaft wellhead from the ground, The unit is m.
将（3）式中V的表达式代入（4）式中，即求得烟羽有效释放高度与回风井井径两者之间的关系： Substituting the expression of V in formula (3) into formula (4), the relationship between the effective release height of the plume and the diameter of the return air well is obtained:
（5） (5)
最后将烟羽有效释放高度公式代入回风井下风方向中心轴线处的高斯烟羽扩散模型公式中： Finally, the formula for the effective release height of the plume is substituted into the Gaussian plume diffusion model formula at the central axis in the downwind direction of the return shaft:
（6） (6)
式（6）中：X（x,0,0）表示回风井下风方向中心轴线x米处的矿井气态流出物浓度，单位为Bq·m-3 ； 是纵向扩散参数，单位为m；u是烟羽有效释放高度处风速，单位为m/s；根据式（6）推导出回风井下风方向中心轴线上气态流出物浓度与回风井井径之间的表达式： In the formula (6): X (x, 0, 0) represents the gaseous effluent concentration of the mine at the central axis x meters in the downwind direction of the return air shaft, and the unit is Bq m-3; is the longitudinal diffusion parameter, the unit is m; u is the wind speed at the effective release height of the plume, the unit is m/s; according to formula (6), the concentration of gaseous effluent on the central axis of the downwind direction of the return air shaft and the diameter of the return air shaft are deduced Expressions between:
（7） (7)
根据布里格斯方法并由公式： According to the Briggs method and by the formula:
（8） (8)
（9） (9)
求出（7）式中的参数。 Find the parameters in (7) formula.
令 、并代入（7）中可得下式： make , And substitute into (7) to get the following formula:
（10） (10)
该式即为简化后的回风井下风方向中心轴线处近地表气态流出物浓度与回风井井口直径Di之间的理论公式。 This formula is the simplified theoretical formula between the near-surface gaseous effluent concentration at the central axis in the downwind direction of the return air shaft and the wellhead diameter D i of the return air shaft.
利用（10）式计算出回风井下风方向中心轴上2000米范围内近地空气污染物浓度的分布，通过减小井口直径Di来降低井口周边空气污染物浓度，当污染物浓度不再随井口直径Di的减小有较大变化时，即能得到最优化的回风井井口直径Di，该井口直径Di即为锥形喷嘴出口直径，从而实现铀矿回风井周边气态污染物防控的优化。 Use formula (10) to calculate the distribution of air pollutant concentration near the ground within 2000 meters on the central axis of the downwind direction of the return air shaft, and reduce the concentration of air pollutants around the wellhead by reducing the diameter of the wellhead. When the concentration of pollutants is no longer When there is a large change with the decrease of the wellhead diameter D i , the optimized wellhead diameter D i of the return air shaft can be obtained . Optimization of pollutant prevention and control.
本发明与现有技术相比具有如下特点： Compared with the prior art, the present invention has the following characteristics:
（1）本方法在不改变矿山运行工况和增加通风量的情况下，采用在回风井井口添加锥形喷嘴的方式就达到降低铀矿周边环境中气态流出物浓度的目的。因此该方法不仅具有较强的可行性，还具备良好的经济性，其广泛适用于各类矿山回风井污染物防治。 (1) This method achieves the purpose of reducing the concentration of gaseous effluents in the surrounding environment of uranium mines by adding conical nozzles at the wellhead of the return air shaft without changing the operating conditions of the mine and increasing the ventilation volume. Therefore, this method not only has strong feasibility, but also has good economy, and it is widely applicable to the prevention and control of pollutants in return air shafts of various mines.
（2）本方法通过建立喷嘴口径与回风井周边近地空气气态流出物浓度的理论计算公式，可方便快速预测不同井径下矿井周边任意位置的气态流出物浓度水平，实现对锥形喷嘴出口直径的优化。 (2) By establishing the theoretical calculation formula of nozzle diameter and near-earth air gaseous effluent concentration around the return air shaft, this method can conveniently and quickly predict the concentration level of gaseous effluent at any position around the mine under different well diameters, and realize the accuracy of conical nozzles. Optimization of outlet diameter.
以下结合附图和具体实施方式对本发明的详细结构作进一步描述。 The detailed structure of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
附图说明 Description of drawings
附图1为现有铀矿回风井口的排放示意图； Accompanying drawing 1 is the discharge schematic diagram of existing uranium ore return air wellhead;
附图2为加锥形喷嘴后铀矿回风井口排放示意图； Accompanying drawing 2 is the schematic diagram of uranium return air wellhead discharge after adding conical nozzle;
附图3为锥形喷嘴出口直径分别为1米、2米和3米时，A回风井下风向中轴线上3000米范围内各监测点近地空气中附加氡浓度曲线图。 Accompanying drawing 3 is when the outlet diameter of the conical nozzle is 1 meter, 2 meters and 3 meters respectively, the additional radon concentration curve in the near-earth air of each monitoring point within the range of 3000 meters on the central axis of the downwind direction of the A return air shaft.
具体实施方式 Detailed ways
一种降低铀矿气态流出物对周边环境危害的优化方法，在铀矿回风井1的井口加装一个锥形喷嘴3，通过减小铀矿气态流出物出口的截面积，以增大出口流速和有效释放高度的方式来实现降低周边环境近地空气中污染物浓度的目的。 An optimization method for reducing the harm of uranium ore gaseous effluent to the surrounding environment. A conical nozzle 3 is installed at the wellhead of the uranium ore return air shaft 1 to increase the outlet by reducing the cross-sectional area of the uranium ore gaseous effluent outlet. The purpose of reducing the concentration of pollutants in the air near the ground in the surrounding environment is achieved by means of flow rate and effective release height.
研究表明：铀矿回风井气态污染物主要集中于井口周边2000米范围内，在此区域外受污染程度较低；平坦地形下污染物迁移扩散距离最远，且沿回风井1下风方向中心轴上的污染物浓度最高。 The research shows that the gaseous pollutants in the uranium mine return air shaft are mainly concentrated within 2000 meters around the wellhead, and the pollution degree outside this area is relatively low; the pollutants migrate and diffuse the farthest in the flat terrain, and they are along the downwind direction of the return air shaft 1 The concentration of pollutants is highest on the central axis.
以高斯烟羽模型为基础推导在通风量和污染物排放量不变的情况下回风井1的直径与近地空气污染物浓度的计算公式，通过该公式对回风井1的井口进行优化设计，并利用该公式针对平坦地形回风井1下风方向中心轴线2000米范围内的近地空气污染物水平进行优化。 Based on the Gaussian plume model, the calculation formula of the diameter of the return air shaft 1 and the concentration of air pollutants near the ground is derived under the condition of constant ventilation and pollutant discharge, and the wellhead of the return air shaft 1 is optimized by this formula Design, and use this formula to optimize the level of near-earth air pollutants within 2000 meters of the central axis in the downwind direction of return shaft 1 in flat terrain.
首先推导出平坦地形回风井1的井口直径与矿井下风方向中心轴线上近地表气态流出物浓度之间的理论公式，理论公式推导过程如下：根据回风井1井口加锥形喷嘴3前后气态流出物与锥形喷嘴3直径之间的关系公式： First, the theoretical formula between the diameter of the wellhead of return air shaft 1 in flat terrain and the concentration of gaseous effluent near the surface on the central axis in the downwind direction of the mine is deduced. The formula for the relationship between the effluent and the diameter of the conical nozzle 3:
（1） (1)
式（1）中：S1为回风井1井口的截面积，S2为锥形喷嘴3嘴口的截面积，单位为m2；V1为加锥形喷嘴3前的气态流出物出口速度，V2为加锥形喷嘴2后的气态流出物出口速度，单位为m/s。 In the formula (1): S 1 is the cross-sectional area of the well head of the return air shaft 1, S 2 is the cross-sectional area of the mouth of the conical nozzle 3, the unit is m 2 ; V 1 is the gaseous effluent outlet before the conical nozzle 3 is added Velocity, V 2 is the exit velocity of gaseous effluent after adding conical nozzle 2, the unit is m/s.
根据式（1）求出加锥形喷嘴3之后的气态流出物出口流速，再将求得的气态流出物出口流速表达式以及测量得到的气态流出物平均浓度代入气态流出物释放率公式： Calculate the outlet velocity of the gaseous effluent after adding the conical nozzle 3 according to formula (1), and then substitute the obtained expression for the outlet velocity of the gaseous effluent and the average concentration of the gaseous effluent obtained by measurement into the formula for the release rate of the gaseous effluent:
（2） (2)
式（2）中：Q为释放率，单位为Bq·s－1；C0为气态流出物平均浓度，单位为Bq/m3；P为井口气态流出物流率，单位为m3/s；S为回风井1和锥形喷嘴3任一监测面的截面积，单位为m2；V是回风井1和锥形喷嘴3任一监测面气态流出物的平均流速，单位为m/s。 In formula (2): Q is the release rate, the unit is Bq s-1; C 0 is the average concentration of gaseous effluent, the unit is Bq/m3; P is the gaseous effluent flow rate at the wellhead, the unit is m 3 /s; S is the cross-sectional area of any monitoring surface of return air shaft 1 and conical nozzle 3, in m2 ; V is the average velocity of the gaseous effluent at any monitoring surface of return air shaft 1 and conical nozzle 3, in m/s .
根据式（2）求得气态流出物释放率与井径之间的关系： The relationship between gaseous effluent release rate and well diameter is obtained according to formula (2):
（3） (3)
式（3）中：Di为回风井1井口直径，单位为m。 In formula (3): Di is the diameter of the wellhead of return air shaft 1, in m.
已知烟羽有效释放高度h与回风井1井径以及气态流出物出口流速三者之间的关系： Known the relationship between the effective release height h of the plume and the diameter of the return air shaft 1 and the outlet velocity of the gaseous effluent:
（4） (4)
式（4）中：h为回风井1烟羽有效释放高度，单位为m；us 是回风井1井口高度处平均风速，单位为m/s； hs为回风井1井口离地面高度，单位为m。 In formula (4): h is the effective release height of the plume of return air shaft 1, in m; u s is the average wind speed at the height of the well head of return air shaft 1, in m/s; h s is the distance from the well head of return air shaft 1 The height of the ground, in m.
将（3）式中V的表达式代入（4）式中，即求得烟羽有效释放高度与回风井1井径两者之间的关系： Substituting the expression of V in formula (3) into formula (4), the relationship between the effective release height of the plume and the diameter of return air shaft 1 is obtained:
（5） (5)
最后将烟羽有效释放高度公式代入回风井1下风方向中心轴线处的高斯烟羽扩散模型公式中： Finally, the formula for the effective release height of the plume is substituted into the Gaussian plume diffusion model formula at the central axis in the downwind direction of the return shaft 1:
（6） (6)
式（6）中：X（x,0,0）表示回风井1下风方向中心轴线x米处的矿井气态流出物浓度，单位为Bq·m-3 ； 是纵向扩散参数，单位为m；u是烟羽有效释放高度处风速，单位为m/s；根据式（6）推导出回风井1下风方向中心轴线上气态流出物浓度与回风井1井径之间的表达式： In the formula (6): X (x, 0, 0) represents the gaseous effluent concentration of the mine at the central axis x meters in the downwind direction of the air return shaft 1, and the unit is Bq m-3; is the longitudinal diffusion parameter, the unit is m; u is the wind speed at the effective release height of the plume, the unit is m/s; according to formula (6), the gaseous effluent concentration on the central axis of the downwind direction of the return air shaft 1 is deduced from the Expressions between diameters:
（7） (7)
根据布里格斯方法并由公式： According to the Briggs method and by the formula:
（8） (8)
（9） (9)
求出（7）式中的参数。 Find the parameters in (7) formula.
令 、并代入（7）中可得下式： make , And substitute into (7) to get the following formula:
（10） (10)
该式即为简化后的回风井1下风方向中心轴线处近地表气态流出物浓度与回风井1井口直径Di之间的理论公式。 This formula is the simplified theoretical formula between the gaseous effluent concentration near the surface at the central axis in the downwind direction of return air shaft 1 and the wellhead diameter D i of return air shaft 1.
利用（10）式计算出回风井1下风方向中心轴上2000米范围内近地空气污染物浓度的分布，通过减小井口直径Di来降低井口周边空气污染物浓度，当污染物浓度不再随井口直径Di的减小有较大变化时，即能得到最优化的回风井1井口直径Di，该井口直径Di即为锥形喷嘴3出口直径，从而实现铀矿回风井1周边气态污染物防控的优化。 Use formula (10) to calculate the distribution of air pollutant concentration near the ground within 2000 meters on the central axis of the downwind direction of return air shaft 1, and reduce the concentration of air pollutants around the wellhead by reducing the diameter of the wellhead. When there is a large change with the decrease of the wellhead diameter D i , the optimized wellhead diameter D i of the air return shaft 1 can be obtained, and the wellhead diameter D i is the outlet diameter of the conical nozzle 3, so as to realize the return air of the uranium ore Optimization of prevention and control of gaseous pollutants around well 1.
利用本发明对某铀矿山A回风井气态流出物氡的排放进行优化设计，在A回风井流出氡释放率、流量和风速等参数不变的情况下，分别加装出口直径为1米、2米、3米、5米、5米、7米、9米的锥形喷嘴，并利用本发明的理论公式，计算出以铀矿A回风井为中心3000米范围内下风方向中心轴线上各监测点近地空气中的氡附加浓度，化设计中采用该回风井参数进行计算，如表一所示： Utilize the present invention to optimize the design of the discharge of radon in the gaseous effluent radon of the air return shaft A of a certain uranium mine. Under the condition that the radon release rate, flow rate and wind speed of the air return shaft A remain unchanged, the diameter of the outlet is 1 meter. , 2 meters, 3 meters, 5 meters, 5 meters, 7 meters, and 9 meters of conical nozzles, and utilize the theoretical formula of the present invention to calculate the central axis of the downwind direction within the range of 3000 meters centered on the uranium mine A return air shaft The additional concentration of radon in the near-earth air at each monitoring point above is calculated using the parameters of the air return well in the chemical design, as shown in Table 1:
表一 计算参数 Table 1 Calculation parameters
利用公式（10）计算出3000米范围内在不同锥形喷嘴直径下回风井下风方向中心轴线上各监测点近地空气中附加氡浓度，算结果如表二和表三所示： Use the formula (10) to calculate the additional radon concentration in the air near the ground at each monitoring point on the central axis of the downwind direction of the return air shaft under different cone nozzle diameters within 3000 meters. The calculation results are shown in Table 2 and Table 3:
表二 不同井径下回风井流出氡的迁移扩散模拟结果 Table 2 Simulation results of migration and diffusion of radon outflow from return air shafts with different diameters
表三 不同井径下回风井流出氡的迁移扩散模拟结果 Table 3 Simulation results of migration and diffusion of radon outflow from return air shafts with different diameters
从表二和表三看出，A回风井流出氡在大气中的迁移扩散对井径变化十分敏感，特别是从100米～500米距离范围内，口内径越小下风向各点近地空气附加氡浓度越低。 It can be seen from Table 2 and Table 3 that the migration and diffusion of radon in the atmosphere from the air return well A is very sensitive to the change of the well diameter, especially in the range of 100 meters to 500 meters, the smaller the inner diameter of the mouth, the lower the wind direction and the closer to the ground. The lower the additional radon concentration in the air.
附图3是锥形喷嘴出口直径分别为1米、2米和3米时，A回风井下风向中轴线上3000米范围内各监测点近地空气中附加氡浓度曲线图。 Accompanying drawing 3 is when the outlet diameter of the conical nozzle is 1 meter, 2 meters and 3 meters respectively, the additional radon concentration curve in the near-earth air of each monitoring point within the range of 3000 meters on the central axis of the downwind direction of the A return air shaft.
结果表明：当加装的锥形喷嘴后，A回风井周边近地空气氡浓度将明显降低；当喷嘴直径为1米时，回风井周边3000米范围内下风方向中心轴线上近地空气中附加氡浓度均低于国家规定的限值（约20Bq/m3），该结果达到优化的目标且满足辐射防护安全的要求。 The results show that when the conical nozzle is installed, the radon concentration in the near-earth air around the air return shaft A will be significantly reduced; The concentration of additional radon in the medium is lower than the limit value stipulated by the state (about 20Bq/m3), the results reach the optimization goal and meet the requirements of radiation protection safety.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191374.0A CN104863631B (en) | 2015-04-22 | 2015-04-22 | The optimization method that reduction uranium ore gaseous effluent is endangered surrounding enviroment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191374.0A CN104863631B (en) | 2015-04-22 | 2015-04-22 | The optimization method that reduction uranium ore gaseous effluent is endangered surrounding enviroment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104863631A true CN104863631A (en) | 2015-08-26 |
| CN104863631B CN104863631B (en) | 2017-09-12 |
Family
ID=53909754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510191374.0A Active CN104863631B (en) | 2015-04-22 | 2015-04-22 | The optimization method that reduction uranium ore gaseous effluent is endangered surrounding enviroment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104863631B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197544A (en) * | 2016-07-18 | 2016-12-07 | 南华大学 | Particle packing type is emanated the determination method of physical parameter and measurement apparatus thereof that medium radon migrates |
| CN107228953A (en) * | 2017-07-20 | 2017-10-03 | 西南大学 | A kind of soil near surface flow rate of water flow measurement system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2325102Y (en) * | 1997-10-06 | 1999-06-23 | 陶炎勋 | Jetting type apparatus for removing sulphur and dust |
| CN101977842A (en) * | 2009-03-02 | 2011-02-16 | 卡勒拉公司 | Gas stream multi-pollutants control systems and methods |
| CN103258116A (en) * | 2013-04-18 | 2013-08-21 | 国家电网公司 | Method for constructing atmospheric pollutant diffusion model |
| CN104181276A (en) * | 2013-05-28 | 2014-12-03 | 东北大学 | Unmanned plane-based enterprise carbon emission detection method |
| CN204252918U (en) * | 2014-12-02 | 2015-04-08 | 张红宾 | A kind of wellhead for production |
-
2015
- 2015-04-22 CN CN201510191374.0A patent/CN104863631B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2325102Y (en) * | 1997-10-06 | 1999-06-23 | 陶炎勋 | Jetting type apparatus for removing sulphur and dust |
| CN101977842A (en) * | 2009-03-02 | 2011-02-16 | 卡勒拉公司 | Gas stream multi-pollutants control systems and methods |
| CN103258116A (en) * | 2013-04-18 | 2013-08-21 | 国家电网公司 | Method for constructing atmospheric pollutant diffusion model |
| CN104181276A (en) * | 2013-05-28 | 2014-12-03 | 东北大学 | Unmanned plane-based enterprise carbon emission detection method |
| CN204252918U (en) * | 2014-12-02 | 2015-04-08 | 张红宾 | A kind of wellhead for production |
Non-Patent Citations (2)
| Title |
|---|
| 励哉拱: "环境保护对烟囱设计的要求及其计算", 《环境污染与防治》 * |
| 周注谋: "谈谈含铀石煤开采和利用中的放射性防护问题", 《辐射防护》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197544A (en) * | 2016-07-18 | 2016-12-07 | 南华大学 | Particle packing type is emanated the determination method of physical parameter and measurement apparatus thereof that medium radon migrates |
| CN106197544B (en) * | 2016-07-18 | 2018-05-18 | 南华大学 | Particle packing type emanate medium radon migration physical parameter definite method and its measuring device |
| CN107228953A (en) * | 2017-07-20 | 2017-10-03 | 西南大学 | A kind of soil near surface flow rate of water flow measurement system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104863631B (en) | 2017-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104390898A (en) | Simulation experiment device for spraying and dust-settling law under airflow field and experimental method of simulation experiment device | |
| Liu et al. | Behavior of the particulate matter (PM) emitted by trackless rubber-tyred vehicle (TRTV) at an idle speed under different movement conditions and ventilation optimization | |
| CN103422875B (en) | A kind of method using the distribution control device of major long tunnel ventilation system air quantity to carry out allocation of the amount of air control | |
| CN108171373A (en) | A kind of chemical industrial park poison gas reveals best-effort path planing method | |
| CN104121031A (en) | Ventilation monitoring system and method for long-distance tunnel construction | |
| CN208130819U (en) | Desulfurizing tower and its guiding device | |
| CN104863631B (en) | The optimization method that reduction uranium ore gaseous effluent is endangered surrounding enviroment | |
| CN105457465A (en) | Design method of SNCR-SCR combined flue gas denitrification system process | |
| Hua et al. | The control effect of 3D spiral wind-curtain generator on respirable dust pollution during tunnelling process | |
| Nie et al. | Study of spray atomization law and dust suppression effect of a wet dust catcher on a hydraulic support | |
| CN203441516U (en) | Ventilation structure of sliding and blasting system and capable of effectively removing dust and cooling | |
| Wang et al. | Performance of the micro-clean space system as a personal protection method at coal mine excavation face | |
| CN106500206B (en) | Negative ion air purification method for highway tunnel | |
| CN103939927A (en) | Smoke duct and three-in-one collecting pipe thereof | |
| CN208287715U (en) | A kind of helical blade type even gas distribution device | |
| CN102322287B (en) | Gas drainage, dilution and mixing demister | |
| CN104492290B (en) | Coal mine low-concentration gas mixing device | |
| CN104740935A (en) | Streamline-type two-passage demister with optimized barb | |
| Wang et al. | Study of jet flow and dust motion in flat chambers based on theory of gas-soild two phase flow | |
| Shi et al. | Influence of smoke exhaust volume and smoke vent layout on the ceiling centralized smoke exhaust effect in tunnel fires | |
| CN203239376U (en) | Tunnel construction ventilation device for partial outburst of gas | |
| CN208599444U (en) | A kind of emission-control equipment | |
| Choudhury et al. | The effect of velocity on the dispersion of pollutants in a hypothetical arctic open-pit mine | |
| CN206075155U (en) | A kind of self-loopa adjusting means for atmosphere pollution processing equipment | |
| JP2014070382A (en) | Tunnel ventilation control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |