WO2020098341A1 - 一种下水道防爆炸及沼气收集系统 - Google Patents
一种下水道防爆炸及沼气收集系统 Download PDFInfo
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- WO2020098341A1 WO2020098341A1 PCT/CN2019/104059 CN2019104059W WO2020098341A1 WO 2020098341 A1 WO2020098341 A1 WO 2020098341A1 CN 2019104059 W CN2019104059 W CN 2019104059W WO 2020098341 A1 WO2020098341 A1 WO 2020098341A1
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- collection
- biogas
- collection system
- sewer
- isolation
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
Definitions
- the present invention belongs to the technical field of municipal construction, and specifically relates to a sewer anti-explosion and biogas collection system.
- the reason for the explosion is on the one hand due to the excessive biogas content in the pipeline (the main reason is that there is too much sewage and feces in the sewer.
- biogas will be produced. 8.6% ⁇ 20.8% (by volume) of biogas, it will form an explosive mixed gas); on the other hand, it is due to people ’s negligence, for example: the cigarette butts that were not extinguished while smoking were thrown into the pipeline, Fireworks and firecrackers accidentally fell into the shaft, especially the curiosity of some playful children when they set fireworks and firecrackers could easily throw the fire source into the wellhead and cause an explosion accident.
- biogas is a secondary energy source and a renewable resource. It is widely used in many fields. If the biogas in the sewer is lost, it will cause a lot of energy waste. There are some pipeline biogas collection devices on the market, which have a complicated structure, the collected biogas is not pure enough, and cannot prevent the explosion hazard caused by the fire source entering the well cover.
- the present invention provides a sewer anti-explosion and biogas collection system that can effectively isolate sewer wellheads to prevent sewer explosion accidents, and can collect biogas in the wellhead to facilitate cleaning of wellhead waste.
- a sewer anti-explosion and biogas collection system includes an isolation system and a collection system;
- the isolation system includes a storage platform located under the manhole cover, and the storage platform is controlled by the platform controller according to the signal from the water level sensor located in the well Lifting is controlled, and the sides of the storage platform are separated by a separation plate, and the bottom of the separation plate has a number of water flow holes;
- the collection system includes a collection tube near the top of the shaft, the collection tube is located between adjacent well covers Between the two isolation plates, the collection tube communicates with the collection box outside the well, the collection tube is provided with a number of airflow holes at the top, and the connection between the collection tube and the collection box is provided with an exhaust fan, the exhaust fan It is controlled by the fan controller according to the signal from the biogas detector located in the shaft.
- the upper surface of the storage platform is provided with a number of grooves
- the protrusions in the middle of the grooves have a certain arc
- metal isolation nets are provided at both ends of the grooves.
- the isolation board is provided with a closed door.
- the storage platform controls the lifting and lowering of the hydraulic cylinder through a platform controller.
- the collection pipe leads to the top of the collection box, and the top of the collection box is provided with a switchable biogas transmission channel.
- the platform controller and the fan controller are connected to the handheld terminal through a wireless network.
- the invention has the following advantages: 1.
- the shaft is separated at the mouth of the well cover by an isolation system, so that the fire source entering the well head is away from the methane gas, and explosion accidents are avoided.
- the storage platform of the isolation system can collect the solid pollutants entering the wellhead, timely cleaning can effectively prevent the solid waste pollution in the shaft, and has a very good environmental protection effect; in addition, because the lifting function of the storage platform can also be used for maintenance
- the pedal for personnel to enter the pipeline is convenient and practical.
- the biogas in the shaft can be collected through the collection system to realize the effective utilization of biogas and avoid energy waste.
- Figure 1 is a schematic structural view of the present invention
- Figure 2 is a three-dimensional structure diagram of the storage platform
- Figure 3 is a schematic diagram of the isolation board structure
- Fig. 4 is a control principle diagram of the present invention.
- isolation system In the picture: 1, isolation system; 11, manhole cover; 12, storage platform; 121, groove; 122, metal isolation net; 13, isolation plate; 131 water flow hole; 132, closed door; 14, platform controller; 15 2. Water level sensor; 2. Collection system; 21. Collection tube; 211, air flow hole; 22. Collection box; 23. Exhaust fan; 24. Fan controller; 25. Biogas detector.
- the present invention discloses a sewer anti-explosion and biogas collection system, including an isolation system 1 and a collection system 2; the isolation system includes a liftable storage platform 12 located in the shaft below the manhole cover 11 The storage platform 12 is controlled by the platform controller 14 according to the signal from the water level sensor 15 located in the well.
- the storage platform 12 is separated by a separation plate 13 on both sides of the storage platform 12, the bottom of the isolation plate 13 is Several water flow holes 131, the platform area of the storage platform 12 is larger than the area of the manhole cover 11 so that objects (solids, liquids) entering from the manhole cover 11 preferentially fall on the platform, and the objects that fall at this time are separated on both sides of the separation plate 13 is separated from the two sides of the hoistway;
- the collection system 2 includes a collection tube 21 near the top of the hoistway, the collection tube 21 is located between two isolation plates 13 between adjacent well covers 11, the collection tube 21 communicates with a collection box 22 located outside.
- a plurality of airflow holes 211 are provided on the top of the collection tube 21.
- An extraction fan 23 is provided at the connection between the collection tube 21 and the collection box 22. The extraction fan 23 is provided by a fan
- the controller 24 is controlled according to the signal from the biogas detector 25 located in the shaft.
- the isolation system 1 isolates the shaft through the isolation plates 13 located on both sides below the manhole cover 11. Due to the lighter weight of biogas than air, most of the biogas in the shaft stays in the two isolation plates between the adjacent manhole covers 11 Between 13 and located in the upper part of the shaft, and a small amount of biogas directly under the manhole cover 11 flows away through the mouth of the manhole cover.
- the storage platform 12 of this embodiment is liftable, and it is preferably controlled by a hydraulic cylinder.
- Its normal height can be set according to the height of the water level transmitted by the water level sensor 15 in the well. Generally, it should be higher than the water level in the water channel. 10cm ⁇ 25cm is appropriate. When there is no water or the water level is low, it should be more than 0.5m away from the ground of the waterway.
- the upper surface of the storage platform 12 is provided with a plurality of grooves 121, the protrusions in the middle of the grooves 121 have a certain curvature, and both ends of the grooves 121 are provided with metal isolation nets 122;
- the protrusions can make the water on the surface of the storage platform 12 flow into the shaft smoothly, and the metal isolation nets 122 at both ends can effectively intercept small solid pollutants (such as cigarette butts, paper scraps, bottle caps, etc.) in the groove;
- Platform 12 can not only achieve the above-mentioned role of collecting waste but also can be used as a lifting pedal when people enter the shaft for maintenance, which not only saves the number of tools brought during maintenance, but also makes the lifting platform faster and safer, which is conducive to improving work efficiency.
- the raised plates formed between the grooves 121 can also play a non-slip effect, and the distance between adjacent grooves can be set to a suitable distance to achieve a more ideal effect. In general, the distance between adjacent grooves is set at 1cm ⁇ 3cm is appropriate). From the above analysis, it can be seen that the various functions of the storage platform 12 of the present invention are significantly improved compared to the prior art.
- a closed door 131 is provided on the isolation plate 13; the whole shaft can be connected or disconnected by opening or closing the closed door 131 to facilitate engineering personnel to enter the shaft.
- the collection system 2 of this embodiment collects the biogas in the well through the collection pipe 21 between the partition plates 13 between adjacent well covers 11 in the well and the external collection tank 22 connected to the collection pipe 21.
- the biogas detector 25 detects the biogas content in the shaft (between the two isolation plates 13 between the adjacent manhole covers 11).
- the fan controller 24 starts the exhaust fan 23 to make the well.
- the biogas in the channel enters the pipe to the collection box 22 through the airflow hole 211 on the collection tube 21; in this embodiment, the collection tube 21 is close to the top of the well, and the airflow hole 211 is located on the upper surface of the collection tube 21. Entering the collection pipe 21 can make the collected biogas more pure.
- the on time of the exhaust fan 23 is determined according to the biogas content detected by the biogas detector 25 and the amount of air drawn by the exhaust fan 23, so as to avoid drawing air for too long.
- the collection pipe 21 leads to the top of the collection box 22, and a switchable biogas transmission channel is provided at the top of the collection box 22; when the biogas enters the collection box 22, the biogas flows down the top of the collection box 22 Filling is equivalent to adopting the downward air discharge method, so that a small amount of air accidentally collected during the collection process is located at the lower part of the collection box 22, and then the biogas transmission channel located at the top of the collection box 22 is transferred to the desired location.
- the amount is only slightly less than the collected amount to obtain pure biogas, and the collection box 22 can be cleaned at regular intervals to exclude excess air.
- the collection system 2 of this embodiment has a simple structure, and can effectively collect the biogas in the well, and the collected biogas can be further filtered in the collection box 22 by the downward air exhaust method to obtain pure biogas to avoid energy waste.
- the platform controller 15 and the fan controller 25 are connected to the handheld terminal through a wireless network.
- the storage platform of the isolation system can collect the solid pollutants entering the wellhead, timely cleaning can effectively prevent the solid waste pollution in the shaft, and has a very good environmental protection effect; in addition, because the lifting function of the storage platform can also be used for maintenance
- the pedal for personnel to enter the pipeline is convenient and practical. Sequence listing free content
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Abstract
一种下水道防爆炸及沼气收集系统，属于市政建设技术领域，包括隔离系统（1）和收集系统（2）；隔离系统（1）包括位于井盖（11）下方的储放平台（12），储放平台（12）由平台控制器（14）根据位于井道内的水位传感器（15）传出的信号控制升降，储放平台（12）两侧通过隔离板（13）将井道分隔，隔离板（13）底部有若干个水流孔（131）；收集系统（2）包括靠近井道顶部的收集管（21），收集管（21）位于相邻井盖（11）间的两隔离板（13）之间，收集管（21）与井道外部的收集箱（22）连通，收集管（21）顶部设有若干个气流孔（211），收集管（21）与收集箱（22）连接处设有抽气风扇（23），抽气风扇（23）由风扇控制器（24）根据位于井道内的沼气检测器（25）发出的信号控制。上述下水道防爆炸及沼气收集系统通过隔离系统将落入井口的火源与沼气有效隔离，防止爆炸事故发生；另外可通过收集系统收集沼气，提高能源的再利用。
Description
技术领域本发明属于市政建设技术领域，具体涉及一种下水道防爆炸及沼气收集系统。
随着城市的发展，城市管网铺设越来越密集，其中下水道是众多管道中最基础的一种公共设施，其主要作用是用来排放城市污水和雨水。近年来，国内多个城市都发生过下水道爆炸事故。
爆炸产生的原因一方面是由于管道中的沼气含量过多（主要原因是于下水道中存在过多的污水、粪便，当这些有机物在厌氧条件下经过微生物发酵就会产生沼气，当空气中含有8.6%～20.8%（按体积计）的沼气时，就会形成爆炸性的混合气体）；另一方面是由于人们的疏忽，例如：抽烟时未熄灭的烟头扔进了管道中，过年过节时的烟花爆竹不小心落入井道，尤其是一些贪玩的小朋友在放烟花爆竹时的好奇心很容易将火源扔入井口，造成爆炸事故。并且沼气属于二次能源，且是可再生资源，在众多领域中均有广泛的应用，如果让下水道中的沼气白白流失会造成大量的能源浪费。市场上存在一些管道沼气收集装置，其结构复杂，收集到的沼气不够纯净，且无法预防井盖口进入的火源导致的爆炸危险。
另外由于下水道的井盖大都设有流水的盖口，经过长时间的使用后井道内存在过多的垃圾（废弃纸屑、塑料袋、烟头），不仅污染下水道，而且大量的垃圾会影响水道的流通，清理麻烦。
为了克服上述缺陷，本发明提供了一种可以将下水道井口有效隔离防止下水道发生爆炸事故，且能够收集井道内沼气，方便清理井口废弃物的下水道防爆炸及沼气收集系统。
为了实现上述目的，本发明采用如下技术方案：
一种下水道防爆炸及沼气收集系统，包括隔离系统和收集系统；所述隔离系统包括位于井盖下方的储放平台，所述储放平台由平台控制器根据位于井道内的水位传感器传出的信号控制升降，所述储放平台两侧通过隔离板将井道分隔，所述隔离板底部有若干个水流孔；所述收集系统包括靠近井道顶部的收集管，所述收集管位于相邻井盖间的两隔离板之间，所述收集管与井道外部的收集箱连通，所述收集管顶部设有若干个气流孔，所述收集管与收集箱连接处设有抽气风扇，所述抽气风扇由风扇控制器根据位于井道内的沼气检测器发出的信号控制。
优选的：所述储放平台上表面设有若干凹槽，所述凹槽中部凸起呈一定弧度，凹槽两端设有金属隔离网。
优选的：所述隔离板上设有密闭门。
优选的：所述储放平台通过平台控制器控制液压气缸升降。
优选的：所述收集管通往收集箱顶部，收集箱顶部设有可开关的沼气传输通道。
优选的：所述平台控制器和风扇控制器通过无线网络与手持式终端连接。
本发明与现有技术相比具有如下优点：1.通过隔离系统将井道在井盖口处分离，使进入井口的火源远离沼气，避免发生爆炸事故。2.通过隔离系统的储放平台可收集进入井口的固体污染物，及时清理可有效防止井道内的固体废弃物污染，有很好的环保效果；另外由于储放平台的升降功能还可作为检修人员进入管道的踏板，方便实用。3.通过收集系统可收集井道内的沼气，实现沼气的有效利用，避免能源浪费。
图1为本发明的结构示意图；
图2为储放平台三维结构图；
图3为隔离板结构示意图；
图4为本发明的控制原理图。
图中：1、隔离系统；11、井盖；12、储放平台；121、凹槽；122、金属隔离网；13、隔离板；131水流孔；132、密闭门；14、平台控制器；15、水位传感器；2、收集系统；21、收集管；211、气流孔；22、收集箱；23、抽气风扇；24、风扇控制器；25、沼气检测器。
具体实施方式
如图1至图4所示，本发明公开了一种下水道防爆炸及沼气收集系统，包括隔离系统1和收集系统2；所述隔离系统包括位于井盖11下方井道内的可升降储放平台12，所述储放平台12由平台控制器14根据位于井道内的水位传感器15传出的信号控制升降，所述储放平台12两侧通过隔离板13将井道分隔，所述隔离板13底部有若干个水流孔131，所述储放平台12的平台面积大于井盖11的面积以使从井盖11进入的物体（固体、液体）优先落在平台上，此时落入的物体在两侧隔离板13的设置下与两侧的井道分隔开；所述收集系统2包括靠近井道顶部的收集管21，所述收集管21位于相邻井盖11间的两隔离板13之间，所述收集管21与位于外部的收集箱22连通，所述收集管21顶部设有若干个气流孔211，所述收集管21与收集箱22连接处设有抽气风扇23，所述抽气风扇23由风扇控制器24根据位于井道内的沼气检测器25发出的信号控制。
本实施例中隔离系统1通过位于井盖11下方两侧的隔离板13将井道隔离，由于沼气相比空气的重力轻，使井道内的绝大多数沼气停留在相邻井盖11间的两隔离板13之间，并位于井道上部，而井盖11正下方极少量的沼气则通过井盖口流走，此时井盖11下方空间没有沼气；当有意外火源从井盖11口落入井道后，会停留在没有沼气的储放平台12上，避免沼气遇到火源发生的爆炸事故，大大提高了井道的安全性；在隔离板13底部设有若干个水流孔131，可以使通过井盖11进入的雨水或污水顺利流入井道内；另外储放平台12可留住落入井道的固体废弃物，方便清洁人员及时回收清理，避免污染井道，具有很好的环保效果。本实施例的储放平台12为可升降式，优选采用液压气缸控制升降，其常规时的高度可根据在井道内的水位传感器15传出的水位高度设置，一般情况下应高出水道中水位10cm～25cm为宜，当没有水或水位较低时也应离开水道地面0.5m以上。优选的，所述储放平台12上表面设有若干凹槽121，所述凹槽121中部凸起呈一定弧度，凹槽121两端设有金属隔离网122；通过所述凹槽121中部的凸起可使储放平台12表面的水顺利流入井道，且两端的金属隔离网122可有效拦截住凹槽中的小型固体污染物（如：烟头、纸屑、瓶盖等）；另外储放平台12不仅可以达到上述收集废弃物的作用而且在人员进入井道检修时还可作为升降踏板使用，不仅节省了检修时所带的工具数量，而且升降平台更加快捷安全，有利于提高工作效率（所述凹槽121间形成的凸起板还可以起到防滑的效果，可将相邻凹槽间距设置为合适距离已达到更为理想的效果，一般情况下相邻凹槽间的距离设置在1cm～3cm之间为宜）。由上述分析可以看出，本发明储放平台12的多种功能相比现有技术具有显著的进步。
另外，在所述隔离板13上设有密闭门131；可通过打开或关闭密闭门131实现井道整体的连通或断开，方便工程人员进入对井道作业。
本实施例的收集系统2通过井道内相邻井盖11间的隔离板13之间的收集管21以及与收集管21连接的外部收集箱22来收集井道内的沼气。具体的通过沼气检测器25检测井道中（相邻井盖11间的两隔离板13之间）的沼气含量，当沼气含量达到设定值时，通过风扇控制器24启动抽气风扇23，使井道内的沼气通过收集管21上的气流孔211进入管道至收集箱22；本实施例收集管21靠近井道顶部，气流孔211位于收集管21上表面，其位置设定可使气体从井道顶部逐渐进入收集管21，可使收集到的沼气更为纯净。根据沼气检测器25检测到的沼气含量及抽气风扇23的抽风量决定抽气风扇23的开启时间，以免开启时间过长抽入空气。在一个优选的实施例中，所述收集管21通往收集箱22顶部，收集箱22顶部设有可开关的沼气传输通道；在沼气进入收集箱22时，沼气沿着收集箱22顶部向下填充，相当于采用了向下排空气法，使在收集过程中意外收集到的少量空气位于收集箱22下部，再通过位于收集箱22顶部的沼气传输通道将上方的沼气传送至需要场所，传送量只需略少于收集量即可得到纯净的沼气，可通过每隔一段时间对收集箱22清理以排除多余空气。本实施例的收集系统2结构简单，可有效收集井道内的沼气，且收集到的沼气在收集箱22内通过向下排空气法进一步过滤后可得到纯净的沼气，避免能源浪费。
优选的，所述平台控制器15和风扇控制器25通过无线网络与手持式终端连接。在有需要时可通过手持式终端手动控制储放平台12对平台进行清理或进入井道对井道检修；也可手动控制抽气风扇23清理井道中的沼气或通过长时间的持续通风去除井道内的沼气及其他有毒气体，以方便工程人员进入进行检修和维护。
1.通过隔离系统将井道在井盖口处分离，使进入井口的火源远离沼气，避免发生爆炸事故。2.通过隔离系统的储放平台可收集进入井口的固体污染物，及时清理可有效防止井道内的固体废弃物污染，有很好的环保效果；另外由于储放平台的升降功能还可作为检修人员进入管道的踏板，方便实用。序列表自由内容
上述公开的所有特征除了互相排斥的特征以外，均可以任何方式组合，文中用到的有关方位的词语仅是基于本实施例附图的基础而言，且上述实施例仅为本发明的优选实施例，任何与本发明的原理和实质相一致的修改或改进都应在本发明的保护范围之内。
Claims (6)
- 一种下水道防爆炸及沼气收集系统，其特征在于，包括隔离系统（1）和收集系统（2）；所述隔离系统（1）包括位于井盖（11）下方的储放平台（12），所述储放平台（12）由平台控制器（14）根据位于井道内的水位传感器（15）传出的信号控制升降，所述储放平台（12）两侧通过隔离板（13）将井道分隔，所述隔离板（13）底部有若干个水流孔（131）；所述收集系统（2）包括靠近井道顶部的收集管（21），所述收集管（21）位于相邻井盖（11）间的两隔离板（13）之间，所述收集管（21）与井道外部的收集箱（22）连通，所述收集管（21）顶部设有若干个气流孔（211），所述收集管（21）与收集箱（22）连接处设有抽气风扇（23），所述抽气风扇（23）由风扇控制器（24）根据位于井道内的沼气检测器（25）发出的信号控制。
- 如权利要求1所述的一种下水道防爆炸及沼气收集系统，其特征在于，所述储放平台（12）上表面设有若干凹槽（121），所述凹槽（121）中部凸起呈一定弧度，凹槽（121）两端设有金属隔离网（122）。
- 如权利要求1所述的一种下水道防爆炸及沼气收集系统，其特征在于，所述隔离板（13）上设有密闭门（132）。
- 如权利要求1所述的一种下水道防爆炸及沼气收集系统，其特征在于，所述储放平台（12）通过平台控制器（14）控制液压气缸升降。
- 如权利要求1所述的一种下水道防爆炸及沼气收集系统，其特征在于，所述收集管（21）通往收集箱（22）顶部，收集箱（22）顶部设有可开关的沼气传输通道。
- 如权利要求1至5任一项所述的一种下水道防爆炸及沼气收集系统，其特征在于，所述平台控制器（15）和风扇控制器（25）通过无线网络与手持式终端连接。
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| CN110442054A (zh) * | 2019-07-24 | 2019-11-12 | 昆明理工大学 | 基于LoRa的下水道沼气实时检测与净化嵌入式物联网装置 |
| CN111576601B (zh) * | 2020-05-07 | 2021-08-31 | 嘉兴新博信息科技有限公司 | 一种用于污水处理的持续式下水道沼气抽取换气装置 |
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