CN111792781B - Integrated medical wastewater treatment equipment - Google Patents
Integrated medical wastewater treatment equipment Download PDFInfo
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- CN111792781B CN111792781B CN202010621908.XA CN202010621908A CN111792781B CN 111792781 B CN111792781 B CN 111792781B CN 202010621908 A CN202010621908 A CN 202010621908A CN 111792781 B CN111792781 B CN 111792781B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/003—Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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- C02F3/302—Nitrification and denitrification treatment
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Abstract
本发明公开了一体化医疗废水处理设备，包括由前至后依次连通的一级生物反应池、二级生物反应池、沉淀池、消毒池、污泥池，一级生物反应池上部设有进水口，消毒池上部设有出水管，沉淀池内设有主流通管道组，主流通管道组包括若干主流通管道，相邻主流通管道的外侧壁之间紧密贴靠，各主流通管道的下端开口靠近沉淀池底壁且位于同一水平面内，各主流通管道的上端开口位于同一水平面内，主流通管道从下至上朝后侧倾斜，二级生物反应池与沉淀池之间通过连通管相连通，连通管连接沉淀池一端低于流通管道下端开口，连通管连接二级生物反应池一端靠近液面。本发明可缩短建造周期，降低建造成本，并且提高废水处理的效率，使出水稳定达标。
The invention discloses an integrated medical wastewater treatment equipment, comprising a first-level biological reaction tank, a second-level biological reaction tank, a sedimentation tank, a disinfection tank and a sludge tank which are connected in sequence from front to back. The water outlet, the upper part of the disinfection tank is provided with a water outlet pipe, and the settling tank is provided with a main flow pipe group. The main flow pipe group includes several main flow pipes. It is close to the bottom wall of the sedimentation tank and is located in the same horizontal plane, the upper end openings of each main flow pipeline are located in the same horizontal plane, the main flow pipeline is inclined from bottom to top to the rear side, and the secondary biological reaction tank and the sedimentation tank are connected through a communication pipe. One end of the pipe connected to the sedimentation tank is lower than the opening of the lower end of the circulation pipe, and one end of the connecting pipe connected to the secondary biological reaction tank is close to the liquid surface. The invention can shorten the construction period, reduce the construction cost, and improve the efficiency of wastewater treatment, so that the effluent can reach the standard stably.
Description
Technical Field
The invention relates to the technical field of hydraulic generators, in particular to integrated medical wastewater treatment equipment.
Background
It is known that hospitals discharge a large amount of medical wastewater during operation, the medical wastewater contains a large amount of harmful substances such as germs, viruses, pyrogens and the like, and if the medical wastewater is directly discharged, serious harm is caused to the environment and the human health, so that the medical wastewater can be discharged outwards after corresponding emergency treatment, sterilization, disinfection and other treatment. Particularly, with the advance of medical reform, a large number of community hospitals are newly built, so that the discharge amount of medical wastewater is greatly increased.
The existing medical wastewater treatment device is generally of a reinforced concrete structure, needs on-site excavation construction, has large floor area, long construction period, high construction cost and high subsequent new management difficulty, and is not suitable for medical wastewater treatment of a large number of community hospitals. In particular, some suspended matters suspended in water need to be settled and separated in the treatment device, the settling speed in the water is slow due to the fact that the specific gravity of the suspended matters is close to that of the water, and when waste water flows, the settled suspended matters can be disturbed and then resuspended, and the settling efficiency is seriously influenced.
Disclosure of Invention
The invention aims to solve the problems of large equipment investment, long construction period and low efficiency of sedimentation of suspended matters in wastewater of the conventional medical wastewater treatment device, and provides integrated medical wastewater treatment equipment which can greatly shorten the construction period, reduce the construction cost, remarkably accelerate the sedimentation speed and efficiency of suspended matters in the wastewater and further ensure that the effluent reaches the discharge standard required by the state.
In order to achieve the purpose, the invention adopts the following technical scheme:
integration medical wastewater treatment facility, including control system and can form the one-level biological reaction pond of denitrification by the denitrifying bacteria, can form second grade biological reaction pond, sedimentation tank, disinfection pond, the sludge impoundment of nitrification by the nitrifying bacteria, one-level biological reaction pond, second grade biological reaction pond, sedimentation tank, disinfection pond, sludge impoundment communicate in proper order after by preceding, one-level biological reaction pond upper portion is equipped with the water inlet, disinfection pond upper portion is equipped with the outlet pipe, the sedimentation tank diapire is down trapezoidal, be equipped with mainstream through-pipe way group in the sedimentation tank, mainstream through-pipe way group includes a plurality of mainstream through-pipe ways that are the rectangle array, and closely paste between the lateral wall of adjacent mainstream through-pipe way and lean on, the lower extreme opening of each mainstream through-pipe way is close to the sedimentation tank diapire and is located same horizontal plane, and the upper end opening of each mainstream through-pipe way is close to the sedimentation tank opening and, the main flow pipeline inclines from bottom to top towards the rear side, the secondary biological reaction tank is communicated with the sedimentation tank through a communicating pipe, an opening in the sedimentation tank of the communicating pipe is lower than an opening at the lower end of the flow pipeline, and an opening in the secondary biological reaction tank of the communicating pipe is close to the liquid level.
Firstly, the treatment equipment comprises a primary biological reaction tank, a secondary biological reaction tank, a sedimentation tank, a disinfection tank and a sludge tank which are mutually independent, so that the treatment equipment can be transported to the site for fast assembly after the production of working batches, thereby greatly accelerating the construction period and correspondingly reducing the early investment.
When the medical wastewater enters the primary biological reaction tank through the water inlet, the denitrifying bacteria in the primary biological reaction tank convert the nitrate in the medical wastewater into nitrogen through biological denitrification and escape into the atmosphere, so that the aim of denitrification is fulfilled; nitrifying bacteria in the secondary biological reaction tank convert ammonia nitrogen in the medical wastewater and ammonia nitrogen formed by ammoniation of organic nitrogen into nitrate through biological nitrification; the sedimentation tank can effectively precipitate and separate suspended matters in the wastewater, so that the content of the suspended matters in the water is reduced; the medical wastewater is fully mixed with the disinfectant in the disinfection tank, so that the medical wastewater can be disinfected, and the water discharged outwards through the water outlet pipe can meet the national medical wastewater discharge standard. The sludge tank can be used for temporarily storing the sludge precipitated in the sedimentation tank, and the sludge in the sedimentation tank can be conveniently transported to the sludge tank for storage only through a pipeline and a corresponding pumping device or other existing transportation modes.
Particularly, the main flow pipe group is arranged in the sedimentation tank and comprises a plurality of main flow pipes which are arranged in a rectangular array and are obliquely arranged, so that the medical wastewater entering the sedimentation tank from the secondary biological reaction tank can enter from the lower end of the main flow pipe and flow out from the upper end of the main flow pipe. It can be understood that the medical wastewater flows by means of gravitational potential energy of the medical wastewater, and particularly, when the medical wastewater flows from bottom to top through a plurality of main flow channels of the main flow channel group, the water flow in the main flow channels forms a laminar flow with a slow and stable flow velocity, so that suspended matters mixed in the medical wastewater can be effectively precipitated on the lower side wall of the main flow channel group, and the precipitated wastewater flows out through the upper end opening of the main flow channel and enters a subsequent disinfection tank for chemical disinfection. The sludge deposited on the lower side wall can gradually move downwards along the lower side wall under the action of self gravity, and is discharged from the lower end opening of the main flow pipeline, so as to be deposited at the bottom of the sedimentation tank.
It will be appreciated that, because the "depth" of the medical waste water is shallow in the main flow pipe which is arranged obliquely, the suspended matter thereof is easily deposited on the lower side wall. That is, all the medical wastewater flowing through the sedimentation tank forms a stable laminar flow and is closely spaced to the lower side wall of the sedimentation tank, so that the sedimentation speed and efficiency can be improved to the maximum extent, and suspended matters can be prevented from being "flooded" due to the turbulent flow effect of the water flow.
It should be noted that the bottom wall of the inverted trapezoidal sedimentation tank with the large upper part and the small lower part is convenient for gathering and concentrating the sludge and is convenient for discharging the sludge from the sedimentation tank outwards in the follow-up process.
And the two-stage biological reaction tank is communicated with the sedimentation tank through a communicating pipe, an opening of the communicating pipe in the sedimentation tank is lower than an opening at the lower end of the circulating pipeline, and an opening of the communicating pipe in the two-stage biological reaction tank is close to the liquid level. On one hand, the medical wastewater in the secondary biological reaction tank can be ensured to firstly enter the lower part of the sedimentation tank and then be discharged outwards after being filtered by the main flow pipeline group; on the other hand, the medical wastewater with less suspended matters on the upper layer of the secondary biological reaction tank can enter the sedimentation tank, so that the sedimentation workload of the sedimentation tank can be reduced as much as possible.
Preferably, the primary biological reaction tank is internally provided with a combined filler, and the secondary biological reaction tank is internally provided with an MBBR filler.
The combined filler has the advantages of both soft filler and semi-soft filler, and is characterized in that a plastic wafer is changed into a double-ring large plastic ring by pressing and buckling, and hydroformylation fibers or polyester yarns are pressed on the ring of the ring, so that fiber bundles are uniformly distributed, a film can be hung, bubbles can be effectively cut, and the transfer rate and the utilization rate of oxygen are improved, thereby fully exchanging a water-gas biomembrane, and efficiently treating organic matters in water. And the specific surface area of the MBBR filler is large, and the biological adhesion capability is strong, so that the organic matter removal rate can be improved.
Preferably, a residual chlorine on-line detector electrically connected with the control system is arranged in the disinfection tank.
The residual chlorine on-line detector and the control system can form a feedback mechanism, so that the adding amount of the disinfectant in the disinfection tank can be automatically adjusted.
Preferably, the secondary biological reaction tank is internally provided with a dissolved oxygen online detection instrument electrically connected with a control system.
The DO value (the oxygen content dissolved in the medical wastewater) is detected in real time, positive feedback is formed with a control system, and the aeration quantity of a fan of the secondary biological reaction tank can be conveniently controlled.
Preferably, the upper openings of the primary biological reaction tank, the secondary biological reaction tank, the sedimentation tank, the disinfection tank and the sludge tank are respectively provided with an upper cover, and the upper covers are provided with access holes.
The upper cover can avoid medical waste water to cause secondary pollution to the external environment, and the access hole is used when the daily maintenance of later stage equipment is made things convenient for.
Preferably, the device also comprises a device room, wherein an aeration fan used for aerating the secondary biological reaction tank, a disinfection device used for conveying disinfectants to the disinfection tank and the sludge tank and the control system are arranged in the device room.
The disinfection device may include a hypochlorite generator to chemically disinfect the medical wastewater. The aeration fan, the disinfection device and the like are uniformly and intensively arranged in the equipment room, so that the assembly and debugging are facilitated, and the subsequent maintenance is facilitated.
Preferably, the control system comprises a standard module for controlling working procedures of the primary biological reaction tank, the secondary biological reaction tank, the sedimentation tank, the disinfection tank and the sludge tank, and the control system is a PLC automatic control system.
The PLC automatic control system can realize the automatic treatment of medical wastewater, thereby greatly improving the treatment efficiency and reducing the labor cost.
Preferably, a rear auxiliary duct group attached to the rearmost main flow duct is provided in a rear blank space formed between the rearmost main flow duct and the rear wall of the sedimentation tank, a front auxiliary duct group attached to the foremost main flow duct is provided in a front blank space formed between the foremost main flow duct and the front wall of the sedimentation tank, the front and rear auxiliary duct groups respectively include a plurality of auxiliary ducts attached to each other and having the same inclination angle as the main flow duct, an upper end opening of each auxiliary duct in the front auxiliary duct group and an upper end opening of the main flow duct are located in the same horizontal plane, and a lower end opening of each auxiliary duct in the rear auxiliary duct group and a lower end opening of the main flow duct are located in the same horizontal plane.
It can be understood that a triangular blank interval can be formed between the main flow channel group which is obliquely arranged and the front side wall and the rear side wall of the sedimentation tank, so that the waste of the space of the sedimentation tank is caused, and the reduction of the overall dimension of the sedimentation tank is not facilitated. Therefore, the front auxiliary pipeline group is arranged in the front blank interval on the front side, and the rear auxiliary pipeline group is arranged in the rear blank interval on the rear side, so that the passage for medical wastewater sedimentation is increased, the sedimentation speed is increased, or the overall dimension of the sedimentation tank can be correspondingly reduced.
Preferably, vertical extension flow channels are respectively arranged on the front side wall and the rear side wall of the sedimentation tank, the lower end openings of the extension flow channels on the front side wall are flush with the lower end opening of the main flow channel, and the upper end openings of the extension flow channels are closed; the upper end opening of the extension flow channel on the rear side wall is flush with the upper end opening of the main flow through pipeline, and the lower end opening of the extension flow channel is closed; the lower end opening of the auxiliary pipeline in the front auxiliary pipeline group is communicated with the extending flow channel on the front side wall, and the upper end opening of the auxiliary pipeline in the rear auxiliary pipeline group is communicated with the extending flow channel on the rear side wall.
Because the lower end opening of the auxiliary pipeline in the front auxiliary pipeline group is communicated with the vertical extension flow channel on the front side wall, and the lower end opening of the extension flow channel on the front side wall is flush with the lower end opening of the main flow channel, the medical wastewater in the sedimentation tank can enter through the lower end opening of the extension flow channel and then sequentially enter each auxiliary pipeline in the front auxiliary pipeline group to form sedimentation, and sludge cannot be deposited in the vertical extension flow channel. Like this, because the vertical runner that extends on auxiliary tube upper end opening and the back lateral wall in the auxiliary tube group in the back communicates, consequently, the medical wastewater in the sedimentation tank accessible back auxiliary tube group auxiliary tube lower extreme opening gets into, then flows through vertical extension passageway upper end opening to form at auxiliary tube and deposit.
Preferably, a partition strip extending in the length direction is arranged in the main flow pipeline, the partition strip is divided into an upper water passing channel and a lower sedimentation channel in the main flow pipeline, the partition strip comprises a rectangular frame, a plurality of flow deflectors uniformly distributed in the length direction are arranged between a left frame strip and a right frame strip of the rectangular frame, the left side and the right side of the lower part of each flow deflector are respectively and integrally connected with the left frame strip and the right frame strip of the rectangular frame, the upper parts of the flow deflectors incline towards the front side relative to the rectangular frame, the flow deflectors are positioned in an angle area formed by the rectangular frame and a vertical plane, the included angle between each flow deflector and the vertical plane is smaller than that between each partition strip and the vertical plane, a horizontal partition plate positioned below the main flow pipeline group is arranged in the sedimentation tank, so that a sedimentation area is formed between each partition plate and the bottom of the, the lower end opening of the sedimentation channel is provided with an extension pipe connected to the partition plate, so that the sedimentation channel is communicated with the sedimentation area.
The medical wastewater in the sedimentation tank enters through the opening of the water channel at the lower end of the main flow through pipeline, then rises along the water channel, and finally flows out from the opening at the upper end of the water channel, and suspended matters in the medical wastewater are precipitated downwards and fall onto the separation strips in the process. The partition strip comprises a rectangular frame and a plurality of guide vanes which are uniformly distributed and inclined along the length direction, so that an upward opening is formed between each guide vane and the rectangular frame. The suspended solid that falls on the separation strip can get into the sediment passageway of downside through ascending opening in to the deposit is on the lateral wall under the mainstream through-flow pipeline, then moves down along the lateral wall under the effect of self gravity, and the extension pipeline of sediment passageway lower extreme open-ended gets into in the deposit area of division board below at last.
It should be noted that, because the water passing channel and the sedimentation channel are separated by the partition strip, the floating of suspended matters in the sedimentation channel caused by the flow of medical wastewater in the water passing channel can be effectively avoided. In particular, the baffle arranged along the length direction causes the separator strips to be serrated, and the upward opening of the baffle faces away from the direction of the water flow in the water passage. Therefore, the water flow in the water channel can not enter the sedimentation channel through the opening, namely, the 'dead water' is formed in the sedimentation channel, and the suspended matters are precipitated and move downwards. In addition, as the partition plate is provided with the overflow holes, when sludge in the sedimentation channel falls into the sedimentation area, wastewater in the sedimentation area can flow out upwards through the overflow holes, and the sludge can normally enter the sedimentation area.
Therefore, the invention has the following beneficial effects: the construction period can be greatly shortened, the construction cost is reduced, the settling speed and efficiency of suspended matters in the wastewater are remarkably accelerated, and the discharge standard is further improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
FIG. 2 is a schematic diagram of a sedimentation tank.
FIG. 3 is a partial schematic view of the main flow channel assembly.
Fig. 4 is a schematic view of a structure of the main flow channel group in the sedimentation tank.
In the figure: 1. first order biological reaction pond 11, water inlet 12, upper cover 13, access hole 2, second grade biological reaction pond 21, communicating pipe 3, sedimentation tank 31, preceding blank region 32, back blank region 33, division board 34, sedimentation zone 4, disinfection pond 41, outlet pipe 5, sludge impoundment 6, mainstream through pipe group 61, mainstream through pipe 62, division piece strip 621, rectangle frame 622, water conservancy diversion piece 63, water channel 64, deposit passageway 7, equipment room 8, preceding auxiliary conduit group 81, auxiliary conduit 82, extend runner 9, back auxiliary conduit group.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
As shown in figure 1, the integrated medical wastewater treatment equipment comprises a control system, a first-stage biological reaction tank 1 which can form denitrification by denitrifying bacteria, a second-stage biological reaction tank 2 which can form nitrification by nitrifying bacteria, a sedimentation tank 3, a disinfection tank 4 and a sludge tank 5, wherein a water inlet 11 is formed in the upper part of the first-stage biological reaction tank, a water outlet pipe 41 is formed in the upper part of the disinfection tank, and the first-stage biological reaction tank, the second-stage biological reaction tank, the sedimentation tank, the disinfection tank and the sludge tank are sequentially communicated from front to back, so that medical wastewater can be input from the water inlet and is discharged from the water outlet pipe after being treated.
In this embodiment, the primary biological reaction tank side is referred to as the front side, and the sludge tank side is referred to as the rear side. In addition, the primary biological reaction tank, the secondary biological reaction tank, the sedimentation tank, the disinfection tank and the sludge tank can be made of carbon steel, stainless steel plates, glass fiber reinforced plastics and other materials, so that the industrial mass production and the manufacturing are facilitated. When in use, the device can be arranged on the ground to facilitate arrangement and subsequent maintenance, thereby reducing investment; or buried underground to reduce the occupied area and reasonably utilize resources.
When the medical wastewater enters the primary biological reaction tank through the water inlet, the denitrifying bacteria in the primary biological reaction tank convert the nitrate in the medical wastewater into nitrogen through biological denitrification and escape into the atmosphere, so that the aim of denitrification is fulfilled; nitrifying bacteria in the secondary biological reaction tank convert ammonia nitrogen in the medical wastewater and ammonia nitrogen formed by ammoniation of organic nitrogen into nitrate through biological nitrification; the sedimentation tank can effectively precipitate and separate suspended matters in the wastewater, so that the content of the suspended matters in the water is reduced; the medical wastewater is fully mixed with the disinfectant in the disinfection tank, so that the medical wastewater is disinfected, and the water discharged outwards through the water outlet pipe can meet the national medical wastewater discharge standard. The sludge tank can be used for temporarily storing the sludge precipitated in the sedimentation tank, the sludge in the sedimentation tank can be conveniently transported to the sludge tank for storage only through a pipeline and a corresponding pumping device or other existing transportation modes, and the sludge can be dewatered by a sludge dewatering machine so as to be transported outwards.
It should be noted that the disinfectant in the disinfection tank can adopt sodium hypochlorite, and then is subjected to double disinfection treatment by combining with an ultraviolet sterilizer, so as to ensure that the quality of the effluent water reaches the standard safely. And the mixed liquor in the secondary biological reaction tank can also flow back to the primary biological reaction tank through a pumping pipeline to realize the backflow of the nitrate so as to carry out denitrification.
In addition, the bottom wall of the sedimentation tank can be set to be a reversed isosceles trapezoid with a large upper part and a small lower part, so that sludge formed by suspended matter sedimentation is gathered and concentrated on the bottom wall, and the subsequent sludge is conveniently discharged from the sedimentation tank.
Furthermore, a main flow channel group 6 can be arranged in the sedimentation tank, as shown in fig. 2 and fig. 3, the main flow channel group comprises a plurality of main flow channels 61, the main flow channels can be arranged into a plurality of layers which are tightly attached from bottom to top, and the main flow channels of each layer are attached together side by side along the horizontal direction, so that the main flow channels of the main flow channel group are distributed in a rectangular array. The lower extreme opening of each mainstream through pipeline is close to the sedimentation tank diapire and is located same horizontal plane, and the upper end opening of each mainstream through pipeline is close to the sedimentation tank opening and is located same horizontal plane, and the mainstream through pipeline is from supreme rear side slope down. Certainly, the lateral wall before the foremost mainstream through pipeline lower extreme can support by the sedimentation tank among the mainstream through pipeline group, and the lateral wall behind the sedimentation tank can be supported by the mainstream through pipeline upper end of rearmost, and the left and right sides of mainstream through pipeline group supports respectively and supports by the left and right sides lateral wall of sedimentation tank to arrange the as much as possible mainstream through pipeline in the sedimentation tank, improve the utilization efficiency of sedimentation tank.
In addition, the secondary biological reaction tank is communicated with the sedimentation tank through a communicating pipe 21, one end of the communicating pipe hermetically extends into the sedimentation tank, the other end of the communicating pipe hermetically extends into the secondary biological reaction tank, an opening of the communicating pipe in the sedimentation tank is lower than an opening at the lower end of the circulating pipeline, and an opening of the communicating pipe in the secondary biological reaction tank is close to the liquid level at the upper part. Therefore, the medical wastewater in the secondary biological reaction tank can be ensured to firstly enter the lower part of the sedimentation tank and then be discharged outwards after being precipitated by the main flow pipeline group; on the other hand, the medical wastewater with less suspended matters on the upper layer of the secondary biological reaction tank can enter the sedimentation tank, so that the sedimentation workload of the sedimentation tank can be reduced as much as possible.
When medical waste water relies on self gravitational potential energy to get into in the sedimentation tank from the second grade biological reaction pond to flow from the mainstream through-flow pipeline upper end, rivers in the mainstream through-flow pipeline can form the slow and more stable laminar flow of velocity of flow to make the suspended solid of mixing in medical waste water can deposit effectively on the lateral wall under the mainstream through-flow pipeline, waste water after the sediment flows out through the upper end opening of mainstream through-flow pipeline and gets into in subsequent disinfection pond and carry out the chemical disinfection. The sludge deposited on the lower side wall can gradually move downwards along the lower side wall under the action of self gravity, and is discharged from the lower end opening of the main flow pipeline, so as to be deposited at the bottom of the sedimentation tank.
It should be noted that the lower sidewall of the main flow channel in this embodiment refers to the sidewall of the main flow channel located at the lower side in the inclined state, that is, when the upper portion of the vertical main flow channel is inclined to the right side, the original right sidewall becomes the lower sidewall, and the original left sidewall becomes the upper sidewall.
It will be appreciated that the medical waste water in the obliquely arranged main flow channels is separated from each other by a "depth" which is equal to the vertical distance of the lower side wall of the upper side wall of the main flow channel, so that the suspension thereof can quickly settle on the lower side wall. That is, all the medical wastewater flowing through the sedimentation tank forms stable laminar flow and is very close to the lower side wall of the sediment, so that the sedimentation speed and efficiency can be improved to the maximum extent, and secondary 'flooding' of the settled suspended matters caused by the turbulent effect of the water flow can be avoided.
In order to control the treatment procedure of the medical wastewater conveniently, the invention also comprises an equipment room 7, wherein the control system, the aeration fan used for aerating the primary biological reaction tank and the secondary biological reaction tank and the disinfection device used for conveying disinfectant to the disinfection tank are arranged in the equipment room, so that the assembly and debugging are facilitated, and the subsequent maintenance is also facilitated. Degassing unit wherein can include sodium hypochlorite generator to carry sodium hypochlorite to the disinfection pond in through the pipeline, and then realize the chemical disinfection to medical waste water. The aeration fan can convey air into the primary biological reaction tank and the secondary biological reaction tank through the air pipes, the aeration fan can be directly arranged in the primary biological reaction tank and the secondary biological reaction tank, and a control system between devices can control the operation of the aeration fan so as to control the aeration of the primary biological reaction tank and the secondary biological reaction tank.
Preferably, the control system comprises a standard module for controlling the working procedures of the primary biological reaction tank, the secondary biological reaction tank, the sedimentation tank and the disinfection tank, and the control system is a PLC automatic control system, so that the automatic treatment of the medical wastewater can be realized, the treatment efficiency is greatly improved, and the labor cost is reduced.
As a preferable scheme, MBBR packing (moving bed biological fluidized bed packing) can be respectively arranged in the primary biological reaction tank and the secondary biological reaction tank. The MBBR filler has large specific surface area and strong biological adhesion capacity, so that the removal rate of organic matters can be improved.
In addition, can set up the online detector of chlorine residue that is connected with control system electricity in the disinfection pond to make the online detector of chlorine residue and control system form the feedback mechanism, thereby the sodium hypochlorite disinfectant of automatically regulated disinfection pond adds the dose.
In addition, a dissolved oxygen online detection instrument electrically connected with the control system can be arranged in the secondary biological reaction tank, and positive feedback is formed between the dissolved oxygen online detection instrument and the control system through detecting the DO value (the oxygen content dissolved in the medical wastewater) in real time, so that the aeration quantity of a fan of the secondary biological reaction tank can be conveniently controlled.
For avoiding causing secondary pollution to the external environment, one-level biological reaction pond, second grade biological reaction pond, sedimentation tank, disinfection pond, sludge impoundment upper portion opening part can set up upper cover 12 respectively, covers the access hole 13 that sets up the openable simultaneously on to use when making things convenient for later stage equipment daily overhaul.
Since the main flow channel group is disposed in the sedimentation basin in an inclined manner, as shown in fig. 4, a rear substantially triangular blank space 32 is formed between the rearmost main flow channel in the main flow channel group and the rear wall of the sedimentation basin, and a front substantially triangular blank space 31 is formed between the foremost main flow channel in the main flow channel group and the front wall of the sedimentation basin.
In order to maximize the utilization efficiency of the sedimentation tank, as shown in fig. 2, a rear auxiliary pipe group 9 attached to the rearmost main flow pipe may be disposed in a rear blank space, a front auxiliary pipe group 8 attached to the foremost main flow pipe may be disposed in a front blank space, the front auxiliary pipe group and the rear auxiliary pipe group respectively include a plurality of auxiliary pipes 81 attached to each other and having the same inclination angle as the main flow pipe, wherein an upper end opening of each auxiliary pipe in the front auxiliary pipe group and an upper end opening of the main flow pipe are located in the same horizontal plane, and a lower end opening of each auxiliary pipe in the rear auxiliary pipe group and a lower end opening of the main flow pipe are located in the same horizontal plane, so as to increase a passage through which medical wastewater is settled, thereby improving the sedimentation efficiency, or accordingly reducing the external dimensions of the sedimentation tank. Of course, each of the auxiliary ducts in the front and rear auxiliary duct groups should be arranged in the same rectangular array as the main flow duct.
In order to facilitate the medical wastewater in the sedimentation basin to flow to the upper end through the lower ends of the front auxiliary pipeline group and the rear auxiliary pipeline group so as to fully exert the sedimentation function, preferably, vertical extension flow channels 82 are respectively arranged on the front side wall and the rear side wall of the sedimentation basin, the lower end openings of the extension flow channels on the front side wall are flush with the lower end openings of the main flow through pipelines, and the upper end openings of the extension flow channels are closed; the upper end opening of the extension flow channel on the rear side wall is flush with the upper end opening of the main flow through pipeline, and the lower end opening of the extension flow channel is closed; the lower end opening of the auxiliary pipeline in the front auxiliary pipeline group is communicated with the extending flow channel on the front side wall, and the upper end opening of the auxiliary pipeline in the rear auxiliary pipeline group is communicated with the extending flow channel on the rear side wall.
Therefore, medical wastewater in the sedimentation tank can enter the extension flow channel through the lower end opening of the extension flow channel on the front side wall and then sequentially enter each auxiliary pipeline communicated with the extension channel to form sedimentation, and sludge cannot be deposited in the vertical extension channel. Like this, medical wastewater in the sedimentation tank accessible back auxiliary conduit group's auxiliary conduit lower extreme opening gets into, then flows through the extension passageway upper end opening with the auxiliary conduit upper end opening intercommunication in the back auxiliary conduit group to form at the auxiliary conduit and deposit.
It should be noted that, a plurality of extension flow channels may be respectively arranged on the front and rear side walls of the sedimentation tank side by side, at this time, the lower end opening of the auxiliary pipeline in each front row of the auxiliary pipeline group is communicated with the corresponding extension flow channel, and the upper end opening of the auxiliary pipeline in each rear row of the auxiliary pipeline group is communicated with the corresponding extension flow channel.
Further, as shown in fig. 2 and 3, a partition strip 62 extending in the length direction may be further provided in the main flow channel, and the partition strip is divided into an upper water passage 63 and a lower sedimentation passage 64 in the main flow channel. Specifically, the partition strip includes a rectangular frame 621, a plurality of baffles 622 uniformly distributed along the length direction are disposed between the left and right frame strips of the rectangular frame, the left and right sides of the lower portion of each baffle are respectively integrally connected with the left and right frame strips of the rectangular frame, and the upper portion of each baffle inclines toward the front side relative to the rectangular frame, so that an upward opening is formed between each baffle and the rectangular frame. That is to say, the inclination angle of the rectangular frame is the same as that of the main flow channel, the included angle between the flow deflector and the vertical plane is smaller than that between the partition strips and the vertical plane, and the flow deflector is located in the angle area formed by the rectangular frame and the vertical plane.
Like this, medical waste water in the sedimentation tank gets into through the opening of mainstream through pipeline lower extreme water passing channel, then rises along water passing channel, flows out from water passing channel's upper end opening at last, and at this in-process, the suspended solid in the medical waste water is downward precipitation and falls on the partition strip. The suspended solid that falls on the separation strip can get into the sediment passageway of downside through ascending opening in to the deposit is on the lateral wall under the mainstream through-flow pipeline, then moves down along the lateral wall under the effect of self gravity, and the extension pipeline of sediment passageway lower extreme open-ended gets into in the deposit area of division board below at last. Because the water passing channel and the precipitation channel are separated by the separating strips, the floating of suspended matters in the precipitation channel caused by the flowing of medical wastewater in the water passing channel can be effectively avoided. In particular, the baffle arranged along the length direction causes the separator strips to be serrated, and the upward opening of the baffle faces away from the direction of the water flow in the water passage. Therefore, the water flow in the water channel can not enter the sedimentation channel through the opening, namely, the 'dead water' is formed in the sedimentation channel, and the suspended matters are precipitated and move downwards.
Furthermore, a horizontal partition plate 33 can be arranged in the sedimentation basin below the main flow channel group, so that a sedimentation area 34 is formed between the partition plate and the bottom of the sedimentation basin, and a plurality of overflow holes are arranged on the partition plate. When the sludge in the sedimentation channel falls into the sedimentation area, the wastewater in the sedimentation area can flow out upwards through the overflow holes, and the sludge can normally enter the sedimentation area. The lower extreme opening setting of deposiing the passageway is connected to the extension pipeline of division board to make deposit passageway and sedimentation area intercommunication, be favorable to deposiing mud fast deposit to the sedimentation area in, avoid the secondary of mud to rise, and ensure to deposit and form "stagnant water" in the passageway.
Claims (7)
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| CN102897974A (en) * | 2012-10-12 | 2013-01-30 | 江苏北辰环境科技有限公司 | Process for treating medical wastewater |
| CN203295286U (en) * | 2013-05-19 | 2013-11-20 | 无锡博美环境工程有限公司 | Novel integrated treatment device for hospital wastewater |
| CN204051102U (en) * | 2014-09-17 | 2014-12-31 | 诸城市宏利圣得环境科技有限公司 | Sewage disposal inclined-pipe settler |
| CN104909513A (en) * | 2015-05-22 | 2015-09-16 | 深圳市清研环境科技有限公司 | Sewage treatment device and sewage treatment method |
| CN108623107A (en) * | 2018-07-20 | 2018-10-09 | 上海泓济环保科技股份有限公司 | Integrated sewage treating apparatus and its processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897974A (en) * | 2012-10-12 | 2013-01-30 | 江苏北辰环境科技有限公司 | Process for treating medical wastewater |
| CN203295286U (en) * | 2013-05-19 | 2013-11-20 | 无锡博美环境工程有限公司 | Novel integrated treatment device for hospital wastewater |
| CN204051102U (en) * | 2014-09-17 | 2014-12-31 | 诸城市宏利圣得环境科技有限公司 | Sewage disposal inclined-pipe settler |
| CN104909513A (en) * | 2015-05-22 | 2015-09-16 | 深圳市清研环境科技有限公司 | Sewage treatment device and sewage treatment method |
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